gt/debugfs_engines.o \
gt/debugfs_gt.o \
gt/debugfs_gt_pm.o \
+ gt/gen6_ppgtt.o \
+ gt/gen8_ppgtt.o \
gt/intel_breadcrumbs.o \
gt/intel_context.o \
gt/intel_engine_cs.o \
gt/intel_engine_pm.o \
gt/intel_engine_pool.o \
gt/intel_engine_user.o \
+ gt/intel_ggtt.o \
gt/intel_gt.o \
gt/intel_gt_irq.o \
gt/intel_gt_pm.o \
gt/intel_gt_pm_irq.o \
gt/intel_gt_requests.o \
+ gt/intel_gtt.o \
gt/intel_llc.o \
gt/intel_lrc.o \
gt/intel_mocs.o \
+ gt/intel_ppgtt.o \
gt/intel_rc6.o \
gt/intel_renderstate.o \
gt/intel_reset.o \
#include <drm/i915_drm.h>
+#include "gt/gen6_ppgtt.h"
#include "gt/intel_context.h"
#include "gt/intel_engine_heartbeat.h"
#include "gt/intel_engine_pm.h"
if (HAS_FULL_PPGTT(i915)) {
struct i915_ppgtt *ppgtt;
- ppgtt = i915_ppgtt_create(i915);
+ ppgtt = i915_ppgtt_create(&i915->gt);
if (IS_ERR(ppgtt)) {
DRM_DEBUG_DRIVER("PPGTT setup failed (%ld)\n",
PTR_ERR(ppgtt));
if (args->flags)
return -EINVAL;
- ppgtt = i915_ppgtt_create(i915);
+ ppgtt = i915_ppgtt_create(&i915->gt);
if (IS_ERR(ppgtt))
return PTR_ERR(ppgtt);
#include "i915_drv.h"
#include "i915_gem.h"
-#include "i915_gem_gtt.h"
#include "i915_scheduler.h"
#include "intel_device_info.h"
#include "display/intel_frontbuffer.h"
#include "i915_gem_object_types.h"
#include "i915_gem_gtt.h"
+#include "i915_vma_types.h"
void i915_gem_init__objects(struct drm_i915_private *i915);
mkwrite_device_info(dev_priv)->ppgtt_type = INTEL_PPGTT_FULL;
mkwrite_device_info(dev_priv)->ppgtt_size = 48;
- ppgtt = i915_ppgtt_create(dev_priv);
+ ppgtt = i915_ppgtt_create(&dev_priv->gt);
if (IS_ERR(ppgtt)) {
err = PTR_ERR(ppgtt);
goto out_unlock;
--- /dev/null
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+
+#include <linux/log2.h>
+
+#include "gen6_ppgtt.h"
+#include "i915_scatterlist.h"
+#include "i915_trace.h"
+#include "i915_vgpu.h"
+#include "intel_gt.h"
+
+/* Write pde (index) from the page directory @pd to the page table @pt */
+static inline void gen6_write_pde(const struct gen6_ppgtt *ppgtt,
+ const unsigned int pde,
+ const struct i915_page_table *pt)
+{
+ /* Caller needs to make sure the write completes if necessary */
+ iowrite32(GEN6_PDE_ADDR_ENCODE(px_dma(pt)) | GEN6_PDE_VALID,
+ ppgtt->pd_addr + pde);
+}
+
+void gen7_ppgtt_enable(struct intel_gt *gt)
+{
+ struct drm_i915_private *i915 = gt->i915;
+ struct intel_uncore *uncore = gt->uncore;
+ struct intel_engine_cs *engine;
+ enum intel_engine_id id;
+ u32 ecochk;
+
+ intel_uncore_rmw(uncore, GAC_ECO_BITS, 0, ECOBITS_PPGTT_CACHE64B);
+
+ ecochk = intel_uncore_read(uncore, GAM_ECOCHK);
+ if (IS_HASWELL(i915)) {
+ ecochk |= ECOCHK_PPGTT_WB_HSW;
+ } else {
+ ecochk |= ECOCHK_PPGTT_LLC_IVB;
+ ecochk &= ~ECOCHK_PPGTT_GFDT_IVB;
+ }
+ intel_uncore_write(uncore, GAM_ECOCHK, ecochk);
+
+ for_each_engine(engine, gt, id) {
+ /* GFX_MODE is per-ring on gen7+ */
+ ENGINE_WRITE(engine,
+ RING_MODE_GEN7,
+ _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE));
+ }
+}
+
+void gen6_ppgtt_enable(struct intel_gt *gt)
+{
+ struct intel_uncore *uncore = gt->uncore;
+
+ intel_uncore_rmw(uncore,
+ GAC_ECO_BITS,
+ 0,
+ ECOBITS_SNB_BIT | ECOBITS_PPGTT_CACHE64B);
+
+ intel_uncore_rmw(uncore,
+ GAB_CTL,
+ 0,
+ GAB_CTL_CONT_AFTER_PAGEFAULT);
+
+ intel_uncore_rmw(uncore,
+ GAM_ECOCHK,
+ 0,
+ ECOCHK_SNB_BIT | ECOCHK_PPGTT_CACHE64B);
+
+ if (HAS_PPGTT(uncore->i915)) /* may be disabled for VT-d */
+ intel_uncore_write(uncore,
+ GFX_MODE,
+ _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE));
+}
+
+/* PPGTT support for Sandybdrige/Gen6 and later */
+static void gen6_ppgtt_clear_range(struct i915_address_space *vm,
+ u64 start, u64 length)
+{
+ struct gen6_ppgtt * const ppgtt = to_gen6_ppgtt(i915_vm_to_ppgtt(vm));
+ const unsigned int first_entry = start / I915_GTT_PAGE_SIZE;
+ const gen6_pte_t scratch_pte = vm->scratch[0].encode;
+ unsigned int pde = first_entry / GEN6_PTES;
+ unsigned int pte = first_entry % GEN6_PTES;
+ unsigned int num_entries = length / I915_GTT_PAGE_SIZE;
+
+ while (num_entries) {
+ struct i915_page_table * const pt =
+ i915_pt_entry(ppgtt->base.pd, pde++);
+ const unsigned int count = min(num_entries, GEN6_PTES - pte);
+ gen6_pte_t *vaddr;
+
+ GEM_BUG_ON(px_base(pt) == px_base(&vm->scratch[1]));
+
+ num_entries -= count;
+
+ GEM_BUG_ON(count > atomic_read(&pt->used));
+ if (!atomic_sub_return(count, &pt->used))
+ ppgtt->scan_for_unused_pt = true;
+
+ /*
+ * Note that the hw doesn't support removing PDE on the fly
+ * (they are cached inside the context with no means to
+ * invalidate the cache), so we can only reset the PTE
+ * entries back to scratch.
+ */
+
+ vaddr = kmap_atomic_px(pt);
+ memset32(vaddr + pte, scratch_pte, count);
+ kunmap_atomic(vaddr);
+
+ pte = 0;
+ }
+}
+
+static void gen6_ppgtt_insert_entries(struct i915_address_space *vm,
+ struct i915_vma *vma,
+ enum i915_cache_level cache_level,
+ u32 flags)
+{
+ struct i915_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
+ struct i915_page_directory * const pd = ppgtt->pd;
+ unsigned int first_entry = vma->node.start / I915_GTT_PAGE_SIZE;
+ unsigned int act_pt = first_entry / GEN6_PTES;
+ unsigned int act_pte = first_entry % GEN6_PTES;
+ const u32 pte_encode = vm->pte_encode(0, cache_level, flags);
+ struct sgt_dma iter = sgt_dma(vma);
+ gen6_pte_t *vaddr;
+
+ GEM_BUG_ON(pd->entry[act_pt] == &vm->scratch[1]);
+
+ vaddr = kmap_atomic_px(i915_pt_entry(pd, act_pt));
+ do {
+ vaddr[act_pte] = pte_encode | GEN6_PTE_ADDR_ENCODE(iter.dma);
+
+ iter.dma += I915_GTT_PAGE_SIZE;
+ if (iter.dma == iter.max) {
+ iter.sg = __sg_next(iter.sg);
+ if (!iter.sg)
+ break;
+
+ iter.dma = sg_dma_address(iter.sg);
+ iter.max = iter.dma + iter.sg->length;
+ }
+
+ if (++act_pte == GEN6_PTES) {
+ kunmap_atomic(vaddr);
+ vaddr = kmap_atomic_px(i915_pt_entry(pd, ++act_pt));
+ act_pte = 0;
+ }
+ } while (1);
+ kunmap_atomic(vaddr);
+
+ vma->page_sizes.gtt = I915_GTT_PAGE_SIZE;
+}
+
+static void gen6_flush_pd(struct gen6_ppgtt *ppgtt, u64 start, u64 end)
+{
+ struct i915_page_directory * const pd = ppgtt->base.pd;
+ struct i915_page_table *pt;
+ unsigned int pde;
+
+ start = round_down(start, SZ_64K);
+ end = round_up(end, SZ_64K) - start;
+
+ mutex_lock(&ppgtt->flush);
+
+ gen6_for_each_pde(pt, pd, start, end, pde)
+ gen6_write_pde(ppgtt, pde, pt);
+
+ mb();
+ ioread32(ppgtt->pd_addr + pde - 1);
+ gen6_ggtt_invalidate(ppgtt->base.vm.gt->ggtt);
+ mb();
+
+ mutex_unlock(&ppgtt->flush);
+}
+
+static int gen6_alloc_va_range(struct i915_address_space *vm,
+ u64 start, u64 length)
+{
+ struct gen6_ppgtt *ppgtt = to_gen6_ppgtt(i915_vm_to_ppgtt(vm));
+ struct i915_page_directory * const pd = ppgtt->base.pd;
+ struct i915_page_table *pt, *alloc = NULL;
+ intel_wakeref_t wakeref;
+ u64 from = start;
+ unsigned int pde;
+ int ret = 0;
+
+ wakeref = intel_runtime_pm_get(&vm->i915->runtime_pm);
+
+ spin_lock(&pd->lock);
+ gen6_for_each_pde(pt, pd, start, length, pde) {
+ const unsigned int count = gen6_pte_count(start, length);
+
+ if (px_base(pt) == px_base(&vm->scratch[1])) {
+ spin_unlock(&pd->lock);
+
+ pt = fetch_and_zero(&alloc);
+ if (!pt)
+ pt = alloc_pt(vm);
+ if (IS_ERR(pt)) {
+ ret = PTR_ERR(pt);
+ goto unwind_out;
+ }
+
+ fill32_px(pt, vm->scratch[0].encode);
+
+ spin_lock(&pd->lock);
+ if (pd->entry[pde] == &vm->scratch[1]) {
+ pd->entry[pde] = pt;
+ } else {
+ alloc = pt;
+ pt = pd->entry[pde];
+ }
+ }
+
+ atomic_add(count, &pt->used);
+ }
+ spin_unlock(&pd->lock);
+
+ if (i915_vma_is_bound(ppgtt->vma, I915_VMA_GLOBAL_BIND))
+ gen6_flush_pd(ppgtt, from, start);
+
+ goto out;
+
+unwind_out:
+ gen6_ppgtt_clear_range(vm, from, start - from);
+out:
+ if (alloc)
+ free_px(vm, alloc);
+ intel_runtime_pm_put(&vm->i915->runtime_pm, wakeref);
+ return ret;
+}
+
+static int gen6_ppgtt_init_scratch(struct gen6_ppgtt *ppgtt)
+{
+ struct i915_address_space * const vm = &ppgtt->base.vm;
+ struct i915_page_directory * const pd = ppgtt->base.pd;
+ int ret;
+
+ ret = setup_scratch_page(vm, __GFP_HIGHMEM);
+ if (ret)
+ return ret;
+
+ vm->scratch[0].encode =
+ vm->pte_encode(px_dma(&vm->scratch[0]),
+ I915_CACHE_NONE, PTE_READ_ONLY);
+
+ if (unlikely(setup_page_dma(vm, px_base(&vm->scratch[1])))) {
+ cleanup_scratch_page(vm);
+ return -ENOMEM;
+ }
+
+ fill32_px(&vm->scratch[1], vm->scratch[0].encode);
+ memset_p(pd->entry, &vm->scratch[1], I915_PDES);
+
+ return 0;
+}
+
+static void gen6_ppgtt_free_pd(struct gen6_ppgtt *ppgtt)
+{
+ struct i915_page_directory * const pd = ppgtt->base.pd;
+ struct i915_page_dma * const scratch =
+ px_base(&ppgtt->base.vm.scratch[1]);
+ struct i915_page_table *pt;
+ u32 pde;
+
+ gen6_for_all_pdes(pt, pd, pde)
+ if (px_base(pt) != scratch)
+ free_px(&ppgtt->base.vm, pt);
+}
+
+static void gen6_ppgtt_cleanup(struct i915_address_space *vm)
+{
+ struct gen6_ppgtt *ppgtt = to_gen6_ppgtt(i915_vm_to_ppgtt(vm));
+
+ __i915_vma_put(ppgtt->vma);
+
+ gen6_ppgtt_free_pd(ppgtt);
+ free_scratch(vm);
+
+ mutex_destroy(&ppgtt->flush);
+ mutex_destroy(&ppgtt->pin_mutex);
+ kfree(ppgtt->base.pd);
+}
+
+static int pd_vma_set_pages(struct i915_vma *vma)
+{
+ vma->pages = ERR_PTR(-ENODEV);
+ return 0;
+}
+
+static void pd_vma_clear_pages(struct i915_vma *vma)
+{
+ GEM_BUG_ON(!vma->pages);
+
+ vma->pages = NULL;
+}
+
+static int pd_vma_bind(struct i915_vma *vma,
+ enum i915_cache_level cache_level,
+ u32 unused)
+{
+ struct i915_ggtt *ggtt = i915_vm_to_ggtt(vma->vm);
+ struct gen6_ppgtt *ppgtt = vma->private;
+ u32 ggtt_offset = i915_ggtt_offset(vma) / I915_GTT_PAGE_SIZE;
+
+ px_base(ppgtt->base.pd)->ggtt_offset = ggtt_offset * sizeof(gen6_pte_t);
+ ppgtt->pd_addr = (gen6_pte_t __iomem *)ggtt->gsm + ggtt_offset;
+
+ gen6_flush_pd(ppgtt, 0, ppgtt->base.vm.total);
+ return 0;
+}
+
+static void pd_vma_unbind(struct i915_vma *vma)
+{
+ struct gen6_ppgtt *ppgtt = vma->private;
+ struct i915_page_directory * const pd = ppgtt->base.pd;
+ struct i915_page_dma * const scratch =
+ px_base(&ppgtt->base.vm.scratch[1]);
+ struct i915_page_table *pt;
+ unsigned int pde;
+
+ if (!ppgtt->scan_for_unused_pt)
+ return;
+
+ /* Free all no longer used page tables */
+ gen6_for_all_pdes(pt, ppgtt->base.pd, pde) {
+ if (px_base(pt) == scratch || atomic_read(&pt->used))
+ continue;
+
+ free_px(&ppgtt->base.vm, pt);
+ pd->entry[pde] = scratch;
+ }
+
+ ppgtt->scan_for_unused_pt = false;
+}
+
+static const struct i915_vma_ops pd_vma_ops = {
+ .set_pages = pd_vma_set_pages,
+ .clear_pages = pd_vma_clear_pages,
+ .bind_vma = pd_vma_bind,
+ .unbind_vma = pd_vma_unbind,
+};
+
+static struct i915_vma *pd_vma_create(struct gen6_ppgtt *ppgtt, int size)
+{
+ struct i915_ggtt *ggtt = ppgtt->base.vm.gt->ggtt;
+ struct i915_vma *vma;
+
+ GEM_BUG_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE));
+ GEM_BUG_ON(size > ggtt->vm.total);
+
+ vma = i915_vma_alloc();
+ if (!vma)
+ return ERR_PTR(-ENOMEM);
+
+ i915_active_init(&vma->active, NULL, NULL);
+
+ kref_init(&vma->ref);
+ mutex_init(&vma->pages_mutex);
+ vma->vm = i915_vm_get(&ggtt->vm);
+ vma->ops = &pd_vma_ops;
+ vma->private = ppgtt;
+
+ vma->size = size;
+ vma->fence_size = size;
+ atomic_set(&vma->flags, I915_VMA_GGTT);
+ vma->ggtt_view.type = I915_GGTT_VIEW_ROTATED; /* prevent fencing */
+
+ INIT_LIST_HEAD(&vma->obj_link);
+ INIT_LIST_HEAD(&vma->closed_link);
+
+ return vma;
+}
+
+int gen6_ppgtt_pin(struct i915_ppgtt *base)
+{
+ struct gen6_ppgtt *ppgtt = to_gen6_ppgtt(base);
+ int err;
+
+ GEM_BUG_ON(!atomic_read(&ppgtt->base.vm.open));
+
+ /*
+ * Workaround the limited maximum vma->pin_count and the aliasing_ppgtt
+ * which will be pinned into every active context.
+ * (When vma->pin_count becomes atomic, I expect we will naturally
+ * need a larger, unpacked, type and kill this redundancy.)
+ */
+ if (atomic_add_unless(&ppgtt->pin_count, 1, 0))
+ return 0;
+
+ if (mutex_lock_interruptible(&ppgtt->pin_mutex))
+ return -EINTR;
+
+ /*
+ * PPGTT PDEs reside in the GGTT and consists of 512 entries. The
+ * allocator works in address space sizes, so it's multiplied by page
+ * size. We allocate at the top of the GTT to avoid fragmentation.
+ */
+ err = 0;
+ if (!atomic_read(&ppgtt->pin_count))
+ err = i915_ggtt_pin(ppgtt->vma, GEN6_PD_ALIGN, PIN_HIGH);
+ if (!err)
+ atomic_inc(&ppgtt->pin_count);
+ mutex_unlock(&ppgtt->pin_mutex);
+
+ return err;
+}
+
+void gen6_ppgtt_unpin(struct i915_ppgtt *base)
+{
+ struct gen6_ppgtt *ppgtt = to_gen6_ppgtt(base);
+
+ GEM_BUG_ON(!atomic_read(&ppgtt->pin_count));
+ if (atomic_dec_and_test(&ppgtt->pin_count))
+ i915_vma_unpin(ppgtt->vma);
+}
+
+void gen6_ppgtt_unpin_all(struct i915_ppgtt *base)
+{
+ struct gen6_ppgtt *ppgtt = to_gen6_ppgtt(base);
+
+ if (!atomic_read(&ppgtt->pin_count))
+ return;
+
+ i915_vma_unpin(ppgtt->vma);
+ atomic_set(&ppgtt->pin_count, 0);
+}
+
+struct i915_ppgtt *gen6_ppgtt_create(struct intel_gt *gt)
+{
+ struct i915_ggtt * const ggtt = gt->ggtt;
+ struct gen6_ppgtt *ppgtt;
+ int err;
+
+ ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL);
+ if (!ppgtt)
+ return ERR_PTR(-ENOMEM);
+
+ mutex_init(&ppgtt->flush);
+ mutex_init(&ppgtt->pin_mutex);
+
+ ppgtt_init(&ppgtt->base, gt);
+ ppgtt->base.vm.top = 1;
+
+ ppgtt->base.vm.bind_async_flags = I915_VMA_LOCAL_BIND;
+ ppgtt->base.vm.allocate_va_range = gen6_alloc_va_range;
+ ppgtt->base.vm.clear_range = gen6_ppgtt_clear_range;
+ ppgtt->base.vm.insert_entries = gen6_ppgtt_insert_entries;
+ ppgtt->base.vm.cleanup = gen6_ppgtt_cleanup;
+
+ ppgtt->base.vm.pte_encode = ggtt->vm.pte_encode;
+
+ ppgtt->base.pd = __alloc_pd(sizeof(*ppgtt->base.pd));
+ if (!ppgtt->base.pd) {
+ err = -ENOMEM;
+ goto err_free;
+ }
+
+ err = gen6_ppgtt_init_scratch(ppgtt);
+ if (err)
+ goto err_pd;
+
+ ppgtt->vma = pd_vma_create(ppgtt, GEN6_PD_SIZE);
+ if (IS_ERR(ppgtt->vma)) {
+ err = PTR_ERR(ppgtt->vma);
+ goto err_scratch;
+ }
+
+ return &ppgtt->base;
+
+err_scratch:
+ free_scratch(&ppgtt->base.vm);
+err_pd:
+ kfree(ppgtt->base.pd);
+err_free:
+ mutex_destroy(&ppgtt->pin_mutex);
+ kfree(ppgtt);
+ return ERR_PTR(err);
+}
--- /dev/null
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+
+#ifndef __GEN6_PPGTT_H__
+#define __GEN6_PPGTT_H__
+
+#include "intel_gtt.h"
+
+struct gen6_ppgtt {
+ struct i915_ppgtt base;
+
+ struct mutex flush;
+ struct i915_vma *vma;
+ gen6_pte_t __iomem *pd_addr;
+
+ atomic_t pin_count;
+ struct mutex pin_mutex;
+
+ bool scan_for_unused_pt;
+};
+
+static inline u32 gen6_pte_index(u32 addr)
+{
+ return i915_pte_index(addr, GEN6_PDE_SHIFT);
+}
+
+static inline u32 gen6_pte_count(u32 addr, u32 length)
+{
+ return i915_pte_count(addr, length, GEN6_PDE_SHIFT);
+}
+
+static inline u32 gen6_pde_index(u32 addr)
+{
+ return i915_pde_index(addr, GEN6_PDE_SHIFT);
+}
+
+#define __to_gen6_ppgtt(base) container_of(base, struct gen6_ppgtt, base)
+
+static inline struct gen6_ppgtt *to_gen6_ppgtt(struct i915_ppgtt *base)
+{
+ BUILD_BUG_ON(offsetof(struct gen6_ppgtt, base));
+ return __to_gen6_ppgtt(base);
+}
+
+/*
+ * gen6_for_each_pde() iterates over every pde from start until start+length.
+ * If start and start+length are not perfectly divisible, the macro will round
+ * down and up as needed. Start=0 and length=2G effectively iterates over
+ * every PDE in the system. The macro modifies ALL its parameters except 'pd',
+ * so each of the other parameters should preferably be a simple variable, or
+ * at most an lvalue with no side-effects!
+ */
+#define gen6_for_each_pde(pt, pd, start, length, iter) \
+ for (iter = gen6_pde_index(start); \
+ length > 0 && iter < I915_PDES && \
+ (pt = i915_pt_entry(pd, iter), true); \
+ ({ u32 temp = ALIGN(start+1, 1 << GEN6_PDE_SHIFT); \
+ temp = min(temp - start, length); \
+ start += temp, length -= temp; }), ++iter)
+
+#define gen6_for_all_pdes(pt, pd, iter) \
+ for (iter = 0; \
+ iter < I915_PDES && \
+ (pt = i915_pt_entry(pd, iter), true); \
+ ++iter)
+
+int gen6_ppgtt_pin(struct i915_ppgtt *base);
+void gen6_ppgtt_unpin(struct i915_ppgtt *base);
+void gen6_ppgtt_unpin_all(struct i915_ppgtt *base);
+void gen6_ppgtt_enable(struct intel_gt *gt);
+void gen7_ppgtt_enable(struct intel_gt *gt);
+struct i915_ppgtt *gen6_ppgtt_create(struct intel_gt *gt);
+
+#endif
--- /dev/null
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+
+#include <linux/log2.h>
+
+#include "gen8_ppgtt.h"
+#include "i915_scatterlist.h"
+#include "i915_trace.h"
+#include "i915_vgpu.h"
+#include "intel_gt.h"
+#include "intel_gtt.h"
+
+static u64 gen8_pde_encode(const dma_addr_t addr,
+ const enum i915_cache_level level)
+{
+ u64 pde = addr | _PAGE_PRESENT | _PAGE_RW;
+
+ if (level != I915_CACHE_NONE)
+ pde |= PPAT_CACHED_PDE;
+ else
+ pde |= PPAT_UNCACHED;
+
+ return pde;
+}
+
+static void gen8_ppgtt_notify_vgt(struct i915_ppgtt *ppgtt, bool create)
+{
+ struct drm_i915_private *i915 = ppgtt->vm.i915;
+ struct intel_uncore *uncore = ppgtt->vm.gt->uncore;
+ enum vgt_g2v_type msg;
+ int i;
+
+ if (create)
+ atomic_inc(px_used(ppgtt->pd)); /* never remove */
+ else
+ atomic_dec(px_used(ppgtt->pd));
+
+ mutex_lock(&i915->vgpu.lock);
+
+ if (i915_vm_is_4lvl(&ppgtt->vm)) {
+ const u64 daddr = px_dma(ppgtt->pd);
+
+ intel_uncore_write(uncore,
+ vgtif_reg(pdp[0].lo), lower_32_bits(daddr));
+ intel_uncore_write(uncore,
+ vgtif_reg(pdp[0].hi), upper_32_bits(daddr));
+
+ msg = create ?
+ VGT_G2V_PPGTT_L4_PAGE_TABLE_CREATE :
+ VGT_G2V_PPGTT_L4_PAGE_TABLE_DESTROY;
+ } else {
+ for (i = 0; i < GEN8_3LVL_PDPES; i++) {
+ const u64 daddr = i915_page_dir_dma_addr(ppgtt, i);
+
+ intel_uncore_write(uncore,
+ vgtif_reg(pdp[i].lo),
+ lower_32_bits(daddr));
+ intel_uncore_write(uncore,
+ vgtif_reg(pdp[i].hi),
+ upper_32_bits(daddr));
+ }
+
+ msg = create ?
+ VGT_G2V_PPGTT_L3_PAGE_TABLE_CREATE :
+ VGT_G2V_PPGTT_L3_PAGE_TABLE_DESTROY;
+ }
+
+ /* g2v_notify atomically (via hv trap) consumes the message packet. */
+ intel_uncore_write(uncore, vgtif_reg(g2v_notify), msg);
+
+ mutex_unlock(&i915->vgpu.lock);
+}
+
+/* Index shifts into the pagetable are offset by GEN8_PTE_SHIFT [12] */
+#define GEN8_PAGE_SIZE (SZ_4K) /* page and page-directory sizes are the same */
+#define GEN8_PTE_SHIFT (ilog2(GEN8_PAGE_SIZE))
+#define GEN8_PDES (GEN8_PAGE_SIZE / sizeof(u64))
+#define gen8_pd_shift(lvl) ((lvl) * ilog2(GEN8_PDES))
+#define gen8_pd_index(i, lvl) i915_pde_index((i), gen8_pd_shift(lvl))
+#define __gen8_pte_shift(lvl) (GEN8_PTE_SHIFT + gen8_pd_shift(lvl))
+#define __gen8_pte_index(a, lvl) i915_pde_index((a), __gen8_pte_shift(lvl))
+
+#define as_pd(x) container_of((x), typeof(struct i915_page_directory), pt)
+
+static inline unsigned int
+gen8_pd_range(u64 start, u64 end, int lvl, unsigned int *idx)
+{
+ const int shift = gen8_pd_shift(lvl);
+ const u64 mask = ~0ull << gen8_pd_shift(lvl + 1);
+
+ GEM_BUG_ON(start >= end);
+ end += ~mask >> gen8_pd_shift(1);
+
+ *idx = i915_pde_index(start, shift);
+ if ((start ^ end) & mask)
+ return GEN8_PDES - *idx;
+ else
+ return i915_pde_index(end, shift) - *idx;
+}
+
+static inline bool gen8_pd_contains(u64 start, u64 end, int lvl)
+{
+ const u64 mask = ~0ull << gen8_pd_shift(lvl + 1);
+
+ GEM_BUG_ON(start >= end);
+ return (start ^ end) & mask && (start & ~mask) == 0;
+}
+
+static inline unsigned int gen8_pt_count(u64 start, u64 end)
+{
+ GEM_BUG_ON(start >= end);
+ if ((start ^ end) >> gen8_pd_shift(1))
+ return GEN8_PDES - (start & (GEN8_PDES - 1));
+ else
+ return end - start;
+}
+
+static inline unsigned int
+gen8_pd_top_count(const struct i915_address_space *vm)
+{
+ unsigned int shift = __gen8_pte_shift(vm->top);
+ return (vm->total + (1ull << shift) - 1) >> shift;
+}
+
+static inline struct i915_page_directory *
+gen8_pdp_for_page_index(struct i915_address_space * const vm, const u64 idx)
+{
+ struct i915_ppgtt * const ppgtt = i915_vm_to_ppgtt(vm);
+
+ if (vm->top == 2)
+ return ppgtt->pd;
+ else
+ return i915_pd_entry(ppgtt->pd, gen8_pd_index(idx, vm->top));
+}
+
+static inline struct i915_page_directory *
+gen8_pdp_for_page_address(struct i915_address_space * const vm, const u64 addr)
+{
+ return gen8_pdp_for_page_index(vm, addr >> GEN8_PTE_SHIFT);
+}
+
+static void __gen8_ppgtt_cleanup(struct i915_address_space *vm,
+ struct i915_page_directory *pd,
+ int count, int lvl)
+{
+ if (lvl) {
+ void **pde = pd->entry;
+
+ do {
+ if (!*pde)
+ continue;
+
+ __gen8_ppgtt_cleanup(vm, *pde, GEN8_PDES, lvl - 1);
+ } while (pde++, --count);
+ }
+
+ free_px(vm, pd);
+}
+
+static void gen8_ppgtt_cleanup(struct i915_address_space *vm)
+{
+ struct i915_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
+
+ if (intel_vgpu_active(vm->i915))
+ gen8_ppgtt_notify_vgt(ppgtt, false);
+
+ __gen8_ppgtt_cleanup(vm, ppgtt->pd, gen8_pd_top_count(vm), vm->top);
+ free_scratch(vm);
+}
+
+static u64 __gen8_ppgtt_clear(struct i915_address_space * const vm,
+ struct i915_page_directory * const pd,
+ u64 start, const u64 end, int lvl)
+{
+ const struct i915_page_scratch * const scratch = &vm->scratch[lvl];
+ unsigned int idx, len;
+
+ GEM_BUG_ON(end > vm->total >> GEN8_PTE_SHIFT);
+
+ len = gen8_pd_range(start, end, lvl--, &idx);
+ DBG("%s(%p):{ lvl:%d, start:%llx, end:%llx, idx:%d, len:%d, used:%d }\n",
+ __func__, vm, lvl + 1, start, end,
+ idx, len, atomic_read(px_used(pd)));
+ GEM_BUG_ON(!len || len >= atomic_read(px_used(pd)));
+
+ do {
+ struct i915_page_table *pt = pd->entry[idx];
+
+ if (atomic_fetch_inc(&pt->used) >> gen8_pd_shift(1) &&
+ gen8_pd_contains(start, end, lvl)) {
+ DBG("%s(%p):{ lvl:%d, idx:%d, start:%llx, end:%llx } removing pd\n",
+ __func__, vm, lvl + 1, idx, start, end);
+ clear_pd_entry(pd, idx, scratch);
+ __gen8_ppgtt_cleanup(vm, as_pd(pt), I915_PDES, lvl);
+ start += (u64)I915_PDES << gen8_pd_shift(lvl);
+ continue;
+ }
+
+ if (lvl) {
+ start = __gen8_ppgtt_clear(vm, as_pd(pt),
+ start, end, lvl);
+ } else {
+ unsigned int count;
+ u64 *vaddr;
+
+ count = gen8_pt_count(start, end);
+ DBG("%s(%p):{ lvl:%d, start:%llx, end:%llx, idx:%d, len:%d, used:%d } removing pte\n",
+ __func__, vm, lvl, start, end,
+ gen8_pd_index(start, 0), count,
+ atomic_read(&pt->used));
+ GEM_BUG_ON(!count || count >= atomic_read(&pt->used));
+
+ vaddr = kmap_atomic_px(pt);
+ memset64(vaddr + gen8_pd_index(start, 0),
+ vm->scratch[0].encode,
+ count);
+ kunmap_atomic(vaddr);
+
+ atomic_sub(count, &pt->used);
+ start += count;
+ }
+
+ if (release_pd_entry(pd, idx, pt, scratch))
+ free_px(vm, pt);
+ } while (idx++, --len);
+
+ return start;
+}
+
+static void gen8_ppgtt_clear(struct i915_address_space *vm,
+ u64 start, u64 length)
+{
+ GEM_BUG_ON(!IS_ALIGNED(start, BIT_ULL(GEN8_PTE_SHIFT)));
+ GEM_BUG_ON(!IS_ALIGNED(length, BIT_ULL(GEN8_PTE_SHIFT)));
+ GEM_BUG_ON(range_overflows(start, length, vm->total));
+
+ start >>= GEN8_PTE_SHIFT;
+ length >>= GEN8_PTE_SHIFT;
+ GEM_BUG_ON(length == 0);
+
+ __gen8_ppgtt_clear(vm, i915_vm_to_ppgtt(vm)->pd,
+ start, start + length, vm->top);
+}
+
+static int __gen8_ppgtt_alloc(struct i915_address_space * const vm,
+ struct i915_page_directory * const pd,
+ u64 * const start, const u64 end, int lvl)
+{
+ const struct i915_page_scratch * const scratch = &vm->scratch[lvl];
+ struct i915_page_table *alloc = NULL;
+ unsigned int idx, len;
+ int ret = 0;
+
+ GEM_BUG_ON(end > vm->total >> GEN8_PTE_SHIFT);
+
+ len = gen8_pd_range(*start, end, lvl--, &idx);
+ DBG("%s(%p):{ lvl:%d, start:%llx, end:%llx, idx:%d, len:%d, used:%d }\n",
+ __func__, vm, lvl + 1, *start, end,
+ idx, len, atomic_read(px_used(pd)));
+ GEM_BUG_ON(!len || (idx + len - 1) >> gen8_pd_shift(1));
+
+ spin_lock(&pd->lock);
+ GEM_BUG_ON(!atomic_read(px_used(pd))); /* Must be pinned! */
+ do {
+ struct i915_page_table *pt = pd->entry[idx];
+
+ if (!pt) {
+ spin_unlock(&pd->lock);
+
+ DBG("%s(%p):{ lvl:%d, idx:%d } allocating new tree\n",
+ __func__, vm, lvl + 1, idx);
+
+ pt = fetch_and_zero(&alloc);
+ if (lvl) {
+ if (!pt) {
+ pt = &alloc_pd(vm)->pt;
+ if (IS_ERR(pt)) {
+ ret = PTR_ERR(pt);
+ goto out;
+ }
+ }
+
+ fill_px(pt, vm->scratch[lvl].encode);
+ } else {
+ if (!pt) {
+ pt = alloc_pt(vm);
+ if (IS_ERR(pt)) {
+ ret = PTR_ERR(pt);
+ goto out;
+ }
+ }
+
+ if (intel_vgpu_active(vm->i915) ||
+ gen8_pt_count(*start, end) < I915_PDES)
+ fill_px(pt, vm->scratch[lvl].encode);
+ }
+
+ spin_lock(&pd->lock);
+ if (likely(!pd->entry[idx]))
+ set_pd_entry(pd, idx, pt);
+ else
+ alloc = pt, pt = pd->entry[idx];
+ }
+
+ if (lvl) {
+ atomic_inc(&pt->used);
+ spin_unlock(&pd->lock);
+
+ ret = __gen8_ppgtt_alloc(vm, as_pd(pt),
+ start, end, lvl);
+ if (unlikely(ret)) {
+ if (release_pd_entry(pd, idx, pt, scratch))
+ free_px(vm, pt);
+ goto out;
+ }
+
+ spin_lock(&pd->lock);
+ atomic_dec(&pt->used);
+ GEM_BUG_ON(!atomic_read(&pt->used));
+ } else {
+ unsigned int count = gen8_pt_count(*start, end);
+
+ DBG("%s(%p):{ lvl:%d, start:%llx, end:%llx, idx:%d, len:%d, used:%d } inserting pte\n",
+ __func__, vm, lvl, *start, end,
+ gen8_pd_index(*start, 0), count,
+ atomic_read(&pt->used));
+
+ atomic_add(count, &pt->used);
+ /* All other pdes may be simultaneously removed */
+ GEM_BUG_ON(atomic_read(&pt->used) > NALLOC * I915_PDES);
+ *start += count;
+ }
+ } while (idx++, --len);
+ spin_unlock(&pd->lock);
+out:
+ if (alloc)
+ free_px(vm, alloc);
+ return ret;
+}
+
+static int gen8_ppgtt_alloc(struct i915_address_space *vm,
+ u64 start, u64 length)
+{
+ u64 from;
+ int err;
+
+ GEM_BUG_ON(!IS_ALIGNED(start, BIT_ULL(GEN8_PTE_SHIFT)));
+ GEM_BUG_ON(!IS_ALIGNED(length, BIT_ULL(GEN8_PTE_SHIFT)));
+ GEM_BUG_ON(range_overflows(start, length, vm->total));
+
+ start >>= GEN8_PTE_SHIFT;
+ length >>= GEN8_PTE_SHIFT;
+ GEM_BUG_ON(length == 0);
+ from = start;
+
+ err = __gen8_ppgtt_alloc(vm, i915_vm_to_ppgtt(vm)->pd,
+ &start, start + length, vm->top);
+ if (unlikely(err && from != start))
+ __gen8_ppgtt_clear(vm, i915_vm_to_ppgtt(vm)->pd,
+ from, start, vm->top);
+
+ return err;
+}
+
+static __always_inline u64
+gen8_ppgtt_insert_pte(struct i915_ppgtt *ppgtt,
+ struct i915_page_directory *pdp,
+ struct sgt_dma *iter,
+ u64 idx,
+ enum i915_cache_level cache_level,
+ u32 flags)
+{
+ struct i915_page_directory *pd;
+ const gen8_pte_t pte_encode = gen8_pte_encode(0, cache_level, flags);
+ gen8_pte_t *vaddr;
+
+ pd = i915_pd_entry(pdp, gen8_pd_index(idx, 2));
+ vaddr = kmap_atomic_px(i915_pt_entry(pd, gen8_pd_index(idx, 1)));
+ do {
+ vaddr[gen8_pd_index(idx, 0)] = pte_encode | iter->dma;
+
+ iter->dma += I915_GTT_PAGE_SIZE;
+ if (iter->dma >= iter->max) {
+ iter->sg = __sg_next(iter->sg);
+ if (!iter->sg) {
+ idx = 0;
+ break;
+ }
+
+ iter->dma = sg_dma_address(iter->sg);
+ iter->max = iter->dma + iter->sg->length;
+ }
+
+ if (gen8_pd_index(++idx, 0) == 0) {
+ if (gen8_pd_index(idx, 1) == 0) {
+ /* Limited by sg length for 3lvl */
+ if (gen8_pd_index(idx, 2) == 0)
+ break;
+
+ pd = pdp->entry[gen8_pd_index(idx, 2)];
+ }
+
+ kunmap_atomic(vaddr);
+ vaddr = kmap_atomic_px(i915_pt_entry(pd, gen8_pd_index(idx, 1)));
+ }
+ } while (1);
+ kunmap_atomic(vaddr);
+
+ return idx;
+}
+
+static void gen8_ppgtt_insert_huge(struct i915_vma *vma,
+ struct sgt_dma *iter,
+ enum i915_cache_level cache_level,
+ u32 flags)
+{
+ const gen8_pte_t pte_encode = gen8_pte_encode(0, cache_level, flags);
+ u64 start = vma->node.start;
+ dma_addr_t rem = iter->sg->length;
+
+ GEM_BUG_ON(!i915_vm_is_4lvl(vma->vm));
+
+ do {
+ struct i915_page_directory * const pdp =
+ gen8_pdp_for_page_address(vma->vm, start);
+ struct i915_page_directory * const pd =
+ i915_pd_entry(pdp, __gen8_pte_index(start, 2));
+ gen8_pte_t encode = pte_encode;
+ unsigned int maybe_64K = -1;
+ unsigned int page_size;
+ gen8_pte_t *vaddr;
+ u16 index;
+
+ if (vma->page_sizes.sg & I915_GTT_PAGE_SIZE_2M &&
+ IS_ALIGNED(iter->dma, I915_GTT_PAGE_SIZE_2M) &&
+ rem >= I915_GTT_PAGE_SIZE_2M &&
+ !__gen8_pte_index(start, 0)) {
+ index = __gen8_pte_index(start, 1);
+ encode |= GEN8_PDE_PS_2M;
+ page_size = I915_GTT_PAGE_SIZE_2M;
+
+ vaddr = kmap_atomic_px(pd);
+ } else {
+ struct i915_page_table *pt =
+ i915_pt_entry(pd, __gen8_pte_index(start, 1));
+
+ index = __gen8_pte_index(start, 0);
+ page_size = I915_GTT_PAGE_SIZE;
+
+ if (!index &&
+ vma->page_sizes.sg & I915_GTT_PAGE_SIZE_64K &&
+ IS_ALIGNED(iter->dma, I915_GTT_PAGE_SIZE_64K) &&
+ (IS_ALIGNED(rem, I915_GTT_PAGE_SIZE_64K) ||
+ rem >= (I915_PDES - index) * I915_GTT_PAGE_SIZE))
+ maybe_64K = __gen8_pte_index(start, 1);
+
+ vaddr = kmap_atomic_px(pt);
+ }
+
+ do {
+ GEM_BUG_ON(iter->sg->length < page_size);
+ vaddr[index++] = encode | iter->dma;
+
+ start += page_size;
+ iter->dma += page_size;
+ rem -= page_size;
+ if (iter->dma >= iter->max) {
+ iter->sg = __sg_next(iter->sg);
+ if (!iter->sg)
+ break;
+
+ rem = iter->sg->length;
+ iter->dma = sg_dma_address(iter->sg);
+ iter->max = iter->dma + rem;
+
+ if (maybe_64K != -1 && index < I915_PDES &&
+ !(IS_ALIGNED(iter->dma, I915_GTT_PAGE_SIZE_64K) &&
+ (IS_ALIGNED(rem, I915_GTT_PAGE_SIZE_64K) ||
+ rem >= (I915_PDES - index) * I915_GTT_PAGE_SIZE)))
+ maybe_64K = -1;
+
+ if (unlikely(!IS_ALIGNED(iter->dma, page_size)))
+ break;
+ }
+ } while (rem >= page_size && index < I915_PDES);
+
+ kunmap_atomic(vaddr);
+
+ /*
+ * Is it safe to mark the 2M block as 64K? -- Either we have
+ * filled whole page-table with 64K entries, or filled part of
+ * it and have reached the end of the sg table and we have
+ * enough padding.
+ */
+ if (maybe_64K != -1 &&
+ (index == I915_PDES ||
+ (i915_vm_has_scratch_64K(vma->vm) &&
+ !iter->sg && IS_ALIGNED(vma->node.start +
+ vma->node.size,
+ I915_GTT_PAGE_SIZE_2M)))) {
+ vaddr = kmap_atomic_px(pd);
+ vaddr[maybe_64K] |= GEN8_PDE_IPS_64K;
+ kunmap_atomic(vaddr);
+ page_size = I915_GTT_PAGE_SIZE_64K;
+
+ /*
+ * We write all 4K page entries, even when using 64K
+ * pages. In order to verify that the HW isn't cheating
+ * by using the 4K PTE instead of the 64K PTE, we want
+ * to remove all the surplus entries. If the HW skipped
+ * the 64K PTE, it will read/write into the scratch page
+ * instead - which we detect as missing results during
+ * selftests.
+ */
+ if (I915_SELFTEST_ONLY(vma->vm->scrub_64K)) {
+ u16 i;
+
+ encode = vma->vm->scratch[0].encode;
+ vaddr = kmap_atomic_px(i915_pt_entry(pd, maybe_64K));
+
+ for (i = 1; i < index; i += 16)
+ memset64(vaddr + i, encode, 15);
+
+ kunmap_atomic(vaddr);
+ }
+ }
+
+ vma->page_sizes.gtt |= page_size;
+ } while (iter->sg);
+}
+
+static void gen8_ppgtt_insert(struct i915_address_space *vm,
+ struct i915_vma *vma,
+ enum i915_cache_level cache_level,
+ u32 flags)
+{
+ struct i915_ppgtt * const ppgtt = i915_vm_to_ppgtt(vm);
+ struct sgt_dma iter = sgt_dma(vma);
+
+ if (vma->page_sizes.sg > I915_GTT_PAGE_SIZE) {
+ gen8_ppgtt_insert_huge(vma, &iter, cache_level, flags);
+ } else {
+ u64 idx = vma->node.start >> GEN8_PTE_SHIFT;
+
+ do {
+ struct i915_page_directory * const pdp =
+ gen8_pdp_for_page_index(vm, idx);
+
+ idx = gen8_ppgtt_insert_pte(ppgtt, pdp, &iter, idx,
+ cache_level, flags);
+ } while (idx);
+
+ vma->page_sizes.gtt = I915_GTT_PAGE_SIZE;
+ }
+}
+
+static int gen8_init_scratch(struct i915_address_space *vm)
+{
+ int ret;
+ int i;
+
+ /*
+ * If everybody agrees to not to write into the scratch page,
+ * we can reuse it for all vm, keeping contexts and processes separate.
+ */
+ if (vm->has_read_only && vm->gt->vm && !i915_is_ggtt(vm->gt->vm)) {
+ struct i915_address_space *clone = vm->gt->vm;
+
+ GEM_BUG_ON(!clone->has_read_only);
+
+ vm->scratch_order = clone->scratch_order;
+ memcpy(vm->scratch, clone->scratch, sizeof(vm->scratch));
+ px_dma(&vm->scratch[0]) = 0; /* no xfer of ownership */
+ return 0;
+ }
+
+ ret = setup_scratch_page(vm, __GFP_HIGHMEM);
+ if (ret)
+ return ret;
+
+ vm->scratch[0].encode =
+ gen8_pte_encode(px_dma(&vm->scratch[0]),
+ I915_CACHE_LLC, vm->has_read_only);
+
+ for (i = 1; i <= vm->top; i++) {
+ if (unlikely(setup_page_dma(vm, px_base(&vm->scratch[i]))))
+ goto free_scratch;
+
+ fill_px(&vm->scratch[i], vm->scratch[i - 1].encode);
+ vm->scratch[i].encode =
+ gen8_pde_encode(px_dma(&vm->scratch[i]),
+ I915_CACHE_LLC);
+ }
+
+ return 0;
+
+free_scratch:
+ free_scratch(vm);
+ return -ENOMEM;
+}
+
+static int gen8_preallocate_top_level_pdp(struct i915_ppgtt *ppgtt)
+{
+ struct i915_address_space *vm = &ppgtt->vm;
+ struct i915_page_directory *pd = ppgtt->pd;
+ unsigned int idx;
+
+ GEM_BUG_ON(vm->top != 2);
+ GEM_BUG_ON(gen8_pd_top_count(vm) != GEN8_3LVL_PDPES);
+
+ for (idx = 0; idx < GEN8_3LVL_PDPES; idx++) {
+ struct i915_page_directory *pde;
+
+ pde = alloc_pd(vm);
+ if (IS_ERR(pde))
+ return PTR_ERR(pde);
+
+ fill_px(pde, vm->scratch[1].encode);
+ set_pd_entry(pd, idx, pde);
+ atomic_inc(px_used(pde)); /* keep pinned */
+ }
+ wmb();
+
+ return 0;
+}
+
+static struct i915_page_directory *
+gen8_alloc_top_pd(struct i915_address_space *vm)
+{
+ const unsigned int count = gen8_pd_top_count(vm);
+ struct i915_page_directory *pd;
+
+ GEM_BUG_ON(count > ARRAY_SIZE(pd->entry));
+
+ pd = __alloc_pd(offsetof(typeof(*pd), entry[count]));
+ if (unlikely(!pd))
+ return ERR_PTR(-ENOMEM);
+
+ if (unlikely(setup_page_dma(vm, px_base(pd)))) {
+ kfree(pd);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ fill_page_dma(px_base(pd), vm->scratch[vm->top].encode, count);
+ atomic_inc(px_used(pd)); /* mark as pinned */
+ return pd;
+}
+
+/*
+ * GEN8 legacy ppgtt programming is accomplished through a max 4 PDP registers
+ * with a net effect resembling a 2-level page table in normal x86 terms. Each
+ * PDP represents 1GB of memory 4 * 512 * 512 * 4096 = 4GB legacy 32b address
+ * space.
+ *
+ */
+struct i915_ppgtt *gen8_ppgtt_create(struct intel_gt *gt)
+{
+ struct i915_ppgtt *ppgtt;
+ int err;
+
+ ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL);
+ if (!ppgtt)
+ return ERR_PTR(-ENOMEM);
+
+ ppgtt_init(ppgtt, gt);
+ ppgtt->vm.top = i915_vm_is_4lvl(&ppgtt->vm) ? 3 : 2;
+
+ /*
+ * From bdw, there is hw support for read-only pages in the PPGTT.
+ *
+ * Gen11 has HSDES#:1807136187 unresolved. Disable ro support
+ * for now.
+ *
+ * Gen12 has inherited the same read-only fault issue from gen11.
+ */
+ ppgtt->vm.has_read_only = !IS_GEN_RANGE(gt->i915, 11, 12);
+
+ /*
+ * There are only few exceptions for gen >=6. chv and bxt.
+ * And we are not sure about the latter so play safe for now.
+ */
+ if (IS_CHERRYVIEW(gt->i915) || IS_BROXTON(gt->i915))
+ ppgtt->vm.pt_kmap_wc = true;
+
+ err = gen8_init_scratch(&ppgtt->vm);
+ if (err)
+ goto err_free;
+
+ ppgtt->pd = gen8_alloc_top_pd(&ppgtt->vm);
+ if (IS_ERR(ppgtt->pd)) {
+ err = PTR_ERR(ppgtt->pd);
+ goto err_free_scratch;
+ }
+
+ if (!i915_vm_is_4lvl(&ppgtt->vm)) {
+ err = gen8_preallocate_top_level_pdp(ppgtt);
+ if (err)
+ goto err_free_pd;
+ }
+
+ ppgtt->vm.bind_async_flags = I915_VMA_LOCAL_BIND;
+ ppgtt->vm.insert_entries = gen8_ppgtt_insert;
+ ppgtt->vm.allocate_va_range = gen8_ppgtt_alloc;
+ ppgtt->vm.clear_range = gen8_ppgtt_clear;
+
+ if (intel_vgpu_active(gt->i915))
+ gen8_ppgtt_notify_vgt(ppgtt, true);
+
+ ppgtt->vm.cleanup = gen8_ppgtt_cleanup;
+
+ return ppgtt;
+
+err_free_pd:
+ __gen8_ppgtt_cleanup(&ppgtt->vm, ppgtt->pd,
+ gen8_pd_top_count(&ppgtt->vm), ppgtt->vm.top);
+err_free_scratch:
+ free_scratch(&ppgtt->vm);
+err_free:
+ kfree(ppgtt);
+ return ERR_PTR(err);
+}
--- /dev/null
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+
+#ifndef __GEN8_PPGTT_H__
+#define __GEN8_PPGTT_H__
+
+struct intel_gt;
+
+struct i915_ppgtt *gen8_ppgtt_create(struct intel_gt *gt);
+
+#endif
--- /dev/null
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+
+#include <linux/stop_machine.h>
+
+#include <asm/set_memory.h>
+
+#include "intel_gt.h"
+#include "i915_drv.h"
+#include "i915_scatterlist.h"
+#include "i915_vgpu.h"
+
+#include "intel_gtt.h"
+
+static int
+i915_get_ggtt_vma_pages(struct i915_vma *vma);
+
+static void i915_ggtt_color_adjust(const struct drm_mm_node *node,
+ unsigned long color,
+ u64 *start,
+ u64 *end)
+{
+ if (i915_node_color_differs(node, color))
+ *start += I915_GTT_PAGE_SIZE;
+
+ /*
+ * Also leave a space between the unallocated reserved node after the
+ * GTT and any objects within the GTT, i.e. we use the color adjustment
+ * to insert a guard page to prevent prefetches crossing over the
+ * GTT boundary.
+ */
+ node = list_next_entry(node, node_list);
+ if (node->color != color)
+ *end -= I915_GTT_PAGE_SIZE;
+}
+
+static int ggtt_init_hw(struct i915_ggtt *ggtt)
+{
+ struct drm_i915_private *i915 = ggtt->vm.i915;
+
+ i915_address_space_init(&ggtt->vm, VM_CLASS_GGTT);
+
+ ggtt->vm.is_ggtt = true;
+
+ /* Only VLV supports read-only GGTT mappings */
+ ggtt->vm.has_read_only = IS_VALLEYVIEW(i915);
+
+ if (!HAS_LLC(i915) && !HAS_PPGTT(i915))
+ ggtt->vm.mm.color_adjust = i915_ggtt_color_adjust;
+
+ if (ggtt->mappable_end) {
+ if (!io_mapping_init_wc(&ggtt->iomap,
+ ggtt->gmadr.start,
+ ggtt->mappable_end)) {
+ ggtt->vm.cleanup(&ggtt->vm);
+ return -EIO;
+ }
+
+ ggtt->mtrr = arch_phys_wc_add(ggtt->gmadr.start,
+ ggtt->mappable_end);
+ }
+
+ i915_ggtt_init_fences(ggtt);
+
+ return 0;
+}
+
+/**
+ * i915_ggtt_init_hw - Initialize GGTT hardware
+ * @i915: i915 device
+ */
+int i915_ggtt_init_hw(struct drm_i915_private *i915)
+{
+ int ret;
+
+ stash_init(&i915->mm.wc_stash);
+
+ /*
+ * Note that we use page colouring to enforce a guard page at the
+ * end of the address space. This is required as the CS may prefetch
+ * beyond the end of the batch buffer, across the page boundary,
+ * and beyond the end of the GTT if we do not provide a guard.
+ */
+ ret = ggtt_init_hw(&i915->ggtt);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+/*
+ * Certain Gen5 chipsets require require idling the GPU before
+ * unmapping anything from the GTT when VT-d is enabled.
+ */
+static bool needs_idle_maps(struct drm_i915_private *i915)
+{
+ /*
+ * Query intel_iommu to see if we need the workaround. Presumably that
+ * was loaded first.
+ */
+ return IS_GEN(i915, 5) && IS_MOBILE(i915) && intel_vtd_active();
+}
+
+static void ggtt_suspend_mappings(struct i915_ggtt *ggtt)
+{
+ struct drm_i915_private *i915 = ggtt->vm.i915;
+
+ /*
+ * Don't bother messing with faults pre GEN6 as we have little
+ * documentation supporting that it's a good idea.
+ */
+ if (INTEL_GEN(i915) < 6)
+ return;
+
+ intel_gt_check_and_clear_faults(ggtt->vm.gt);
+
+ ggtt->vm.clear_range(&ggtt->vm, 0, ggtt->vm.total);
+
+ ggtt->invalidate(ggtt);
+}
+
+void i915_gem_suspend_gtt_mappings(struct drm_i915_private *i915)
+{
+ ggtt_suspend_mappings(&i915->ggtt);
+}
+
+void gen6_ggtt_invalidate(struct i915_ggtt *ggtt)
+{
+ struct intel_uncore *uncore = ggtt->vm.gt->uncore;
+
+ spin_lock_irq(&uncore->lock);
+ intel_uncore_write_fw(uncore, GFX_FLSH_CNTL_GEN6, GFX_FLSH_CNTL_EN);
+ intel_uncore_read_fw(uncore, GFX_FLSH_CNTL_GEN6);
+ spin_unlock_irq(&uncore->lock);
+}
+
+static void gen8_ggtt_invalidate(struct i915_ggtt *ggtt)
+{
+ struct intel_uncore *uncore = ggtt->vm.gt->uncore;
+
+ /*
+ * Note that as an uncached mmio write, this will flush the
+ * WCB of the writes into the GGTT before it triggers the invalidate.
+ */
+ intel_uncore_write_fw(uncore, GFX_FLSH_CNTL_GEN6, GFX_FLSH_CNTL_EN);
+}
+
+static void guc_ggtt_invalidate(struct i915_ggtt *ggtt)
+{
+ struct intel_uncore *uncore = ggtt->vm.gt->uncore;
+ struct drm_i915_private *i915 = ggtt->vm.i915;
+
+ gen8_ggtt_invalidate(ggtt);
+
+ if (INTEL_GEN(i915) >= 12)
+ intel_uncore_write_fw(uncore, GEN12_GUC_TLB_INV_CR,
+ GEN12_GUC_TLB_INV_CR_INVALIDATE);
+ else
+ intel_uncore_write_fw(uncore, GEN8_GTCR, GEN8_GTCR_INVALIDATE);
+}
+
+static void gmch_ggtt_invalidate(struct i915_ggtt *ggtt)
+{
+ intel_gtt_chipset_flush();
+}
+
+static void gen8_set_pte(void __iomem *addr, gen8_pte_t pte)
+{
+ writeq(pte, addr);
+}
+
+static void gen8_ggtt_insert_page(struct i915_address_space *vm,
+ dma_addr_t addr,
+ u64 offset,
+ enum i915_cache_level level,
+ u32 unused)
+{
+ struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
+ gen8_pte_t __iomem *pte =
+ (gen8_pte_t __iomem *)ggtt->gsm + offset / I915_GTT_PAGE_SIZE;
+
+ gen8_set_pte(pte, gen8_pte_encode(addr, level, 0));
+
+ ggtt->invalidate(ggtt);
+}
+
+static void gen8_ggtt_insert_entries(struct i915_address_space *vm,
+ struct i915_vma *vma,
+ enum i915_cache_level level,
+ u32 flags)
+{
+ struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
+ struct sgt_iter sgt_iter;
+ gen8_pte_t __iomem *gtt_entries;
+ const gen8_pte_t pte_encode = gen8_pte_encode(0, level, 0);
+ dma_addr_t addr;
+
+ /*
+ * Note that we ignore PTE_READ_ONLY here. The caller must be careful
+ * not to allow the user to override access to a read only page.
+ */
+
+ gtt_entries = (gen8_pte_t __iomem *)ggtt->gsm;
+ gtt_entries += vma->node.start / I915_GTT_PAGE_SIZE;
+ for_each_sgt_daddr(addr, sgt_iter, vma->pages)
+ gen8_set_pte(gtt_entries++, pte_encode | addr);
+
+ /*
+ * We want to flush the TLBs only after we're certain all the PTE
+ * updates have finished.
+ */
+ ggtt->invalidate(ggtt);
+}
+
+static void gen6_ggtt_insert_page(struct i915_address_space *vm,
+ dma_addr_t addr,
+ u64 offset,
+ enum i915_cache_level level,
+ u32 flags)
+{
+ struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
+ gen6_pte_t __iomem *pte =
+ (gen6_pte_t __iomem *)ggtt->gsm + offset / I915_GTT_PAGE_SIZE;
+
+ iowrite32(vm->pte_encode(addr, level, flags), pte);
+
+ ggtt->invalidate(ggtt);
+}
+
+/*
+ * Binds an object into the global gtt with the specified cache level.
+ * The object will be accessible to the GPU via commands whose operands
+ * reference offsets within the global GTT as well as accessible by the GPU
+ * through the GMADR mapped BAR (i915->mm.gtt->gtt).
+ */
+static void gen6_ggtt_insert_entries(struct i915_address_space *vm,
+ struct i915_vma *vma,
+ enum i915_cache_level level,
+ u32 flags)
+{
+ struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
+ gen6_pte_t __iomem *entries = (gen6_pte_t __iomem *)ggtt->gsm;
+ unsigned int i = vma->node.start / I915_GTT_PAGE_SIZE;
+ struct sgt_iter iter;
+ dma_addr_t addr;
+
+ for_each_sgt_daddr(addr, iter, vma->pages)
+ iowrite32(vm->pte_encode(addr, level, flags), &entries[i++]);
+
+ /*
+ * We want to flush the TLBs only after we're certain all the PTE
+ * updates have finished.
+ */
+ ggtt->invalidate(ggtt);
+}
+
+static void nop_clear_range(struct i915_address_space *vm,
+ u64 start, u64 length)
+{
+}
+
+static void gen8_ggtt_clear_range(struct i915_address_space *vm,
+ u64 start, u64 length)
+{
+ struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
+ unsigned int first_entry = start / I915_GTT_PAGE_SIZE;
+ unsigned int num_entries = length / I915_GTT_PAGE_SIZE;
+ const gen8_pte_t scratch_pte = vm->scratch[0].encode;
+ gen8_pte_t __iomem *gtt_base =
+ (gen8_pte_t __iomem *)ggtt->gsm + first_entry;
+ const int max_entries = ggtt_total_entries(ggtt) - first_entry;
+ int i;
+
+ if (WARN(num_entries > max_entries,
+ "First entry = %d; Num entries = %d (max=%d)\n",
+ first_entry, num_entries, max_entries))
+ num_entries = max_entries;
+
+ for (i = 0; i < num_entries; i++)
+ gen8_set_pte(>t_base[i], scratch_pte);
+}
+
+static void bxt_vtd_ggtt_wa(struct i915_address_space *vm)
+{
+ /*
+ * Make sure the internal GAM fifo has been cleared of all GTT
+ * writes before exiting stop_machine(). This guarantees that
+ * any aperture accesses waiting to start in another process
+ * cannot back up behind the GTT writes causing a hang.
+ * The register can be any arbitrary GAM register.
+ */
+ intel_uncore_posting_read_fw(vm->gt->uncore, GFX_FLSH_CNTL_GEN6);
+}
+
+struct insert_page {
+ struct i915_address_space *vm;
+ dma_addr_t addr;
+ u64 offset;
+ enum i915_cache_level level;
+};
+
+static int bxt_vtd_ggtt_insert_page__cb(void *_arg)
+{
+ struct insert_page *arg = _arg;
+
+ gen8_ggtt_insert_page(arg->vm, arg->addr, arg->offset, arg->level, 0);
+ bxt_vtd_ggtt_wa(arg->vm);
+
+ return 0;
+}
+
+static void bxt_vtd_ggtt_insert_page__BKL(struct i915_address_space *vm,
+ dma_addr_t addr,
+ u64 offset,
+ enum i915_cache_level level,
+ u32 unused)
+{
+ struct insert_page arg = { vm, addr, offset, level };
+
+ stop_machine(bxt_vtd_ggtt_insert_page__cb, &arg, NULL);
+}
+
+struct insert_entries {
+ struct i915_address_space *vm;
+ struct i915_vma *vma;
+ enum i915_cache_level level;
+ u32 flags;
+};
+
+static int bxt_vtd_ggtt_insert_entries__cb(void *_arg)
+{
+ struct insert_entries *arg = _arg;
+
+ gen8_ggtt_insert_entries(arg->vm, arg->vma, arg->level, arg->flags);
+ bxt_vtd_ggtt_wa(arg->vm);
+
+ return 0;
+}
+
+static void bxt_vtd_ggtt_insert_entries__BKL(struct i915_address_space *vm,
+ struct i915_vma *vma,
+ enum i915_cache_level level,
+ u32 flags)
+{
+ struct insert_entries arg = { vm, vma, level, flags };
+
+ stop_machine(bxt_vtd_ggtt_insert_entries__cb, &arg, NULL);
+}
+
+struct clear_range {
+ struct i915_address_space *vm;
+ u64 start;
+ u64 length;
+};
+
+static int bxt_vtd_ggtt_clear_range__cb(void *_arg)
+{
+ struct clear_range *arg = _arg;
+
+ gen8_ggtt_clear_range(arg->vm, arg->start, arg->length);
+ bxt_vtd_ggtt_wa(arg->vm);
+
+ return 0;
+}
+
+static void bxt_vtd_ggtt_clear_range__BKL(struct i915_address_space *vm,
+ u64 start,
+ u64 length)
+{
+ struct clear_range arg = { vm, start, length };
+
+ stop_machine(bxt_vtd_ggtt_clear_range__cb, &arg, NULL);
+}
+
+static void gen6_ggtt_clear_range(struct i915_address_space *vm,
+ u64 start, u64 length)
+{
+ struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
+ unsigned int first_entry = start / I915_GTT_PAGE_SIZE;
+ unsigned int num_entries = length / I915_GTT_PAGE_SIZE;
+ gen6_pte_t scratch_pte, __iomem *gtt_base =
+ (gen6_pte_t __iomem *)ggtt->gsm + first_entry;
+ const int max_entries = ggtt_total_entries(ggtt) - first_entry;
+ int i;
+
+ if (WARN(num_entries > max_entries,
+ "First entry = %d; Num entries = %d (max=%d)\n",
+ first_entry, num_entries, max_entries))
+ num_entries = max_entries;
+
+ scratch_pte = vm->scratch[0].encode;
+ for (i = 0; i < num_entries; i++)
+ iowrite32(scratch_pte, >t_base[i]);
+}
+
+static void i915_ggtt_insert_page(struct i915_address_space *vm,
+ dma_addr_t addr,
+ u64 offset,
+ enum i915_cache_level cache_level,
+ u32 unused)
+{
+ unsigned int flags = (cache_level == I915_CACHE_NONE) ?
+ AGP_USER_MEMORY : AGP_USER_CACHED_MEMORY;
+
+ intel_gtt_insert_page(addr, offset >> PAGE_SHIFT, flags);
+}
+
+static void i915_ggtt_insert_entries(struct i915_address_space *vm,
+ struct i915_vma *vma,
+ enum i915_cache_level cache_level,
+ u32 unused)
+{
+ unsigned int flags = (cache_level == I915_CACHE_NONE) ?
+ AGP_USER_MEMORY : AGP_USER_CACHED_MEMORY;
+
+ intel_gtt_insert_sg_entries(vma->pages, vma->node.start >> PAGE_SHIFT,
+ flags);
+}
+
+static void i915_ggtt_clear_range(struct i915_address_space *vm,
+ u64 start, u64 length)
+{
+ intel_gtt_clear_range(start >> PAGE_SHIFT, length >> PAGE_SHIFT);
+}
+
+static int ggtt_bind_vma(struct i915_vma *vma,
+ enum i915_cache_level cache_level,
+ u32 flags)
+{
+ struct drm_i915_private *i915 = vma->vm->i915;
+ struct drm_i915_gem_object *obj = vma->obj;
+ intel_wakeref_t wakeref;
+ u32 pte_flags;
+
+ /* Applicable to VLV (gen8+ do not support RO in the GGTT) */
+ pte_flags = 0;
+ if (i915_gem_object_is_readonly(obj))
+ pte_flags |= PTE_READ_ONLY;
+
+ with_intel_runtime_pm(&i915->runtime_pm, wakeref)
+ vma->vm->insert_entries(vma->vm, vma, cache_level, pte_flags);
+
+ vma->page_sizes.gtt = I915_GTT_PAGE_SIZE;
+
+ /*
+ * Without aliasing PPGTT there's no difference between
+ * GLOBAL/LOCAL_BIND, it's all the same ptes. Hence unconditionally
+ * upgrade to both bound if we bind either to avoid double-binding.
+ */
+ atomic_or(I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND, &vma->flags);
+
+ return 0;
+}
+
+static void ggtt_unbind_vma(struct i915_vma *vma)
+{
+ struct drm_i915_private *i915 = vma->vm->i915;
+ intel_wakeref_t wakeref;
+
+ with_intel_runtime_pm(&i915->runtime_pm, wakeref)
+ vma->vm->clear_range(vma->vm, vma->node.start, vma->size);
+}
+
+static int ggtt_reserve_guc_top(struct i915_ggtt *ggtt)
+{
+ u64 size;
+ int ret;
+
+ if (!USES_GUC(ggtt->vm.i915))
+ return 0;
+
+ GEM_BUG_ON(ggtt->vm.total <= GUC_GGTT_TOP);
+ size = ggtt->vm.total - GUC_GGTT_TOP;
+
+ ret = i915_gem_gtt_reserve(&ggtt->vm, &ggtt->uc_fw, size,
+ GUC_GGTT_TOP, I915_COLOR_UNEVICTABLE,
+ PIN_NOEVICT);
+ if (ret)
+ DRM_DEBUG_DRIVER("Failed to reserve top of GGTT for GuC\n");
+
+ return ret;
+}
+
+static void ggtt_release_guc_top(struct i915_ggtt *ggtt)
+{
+ if (drm_mm_node_allocated(&ggtt->uc_fw))
+ drm_mm_remove_node(&ggtt->uc_fw);
+}
+
+static void cleanup_init_ggtt(struct i915_ggtt *ggtt)
+{
+ ggtt_release_guc_top(ggtt);
+ if (drm_mm_node_allocated(&ggtt->error_capture))
+ drm_mm_remove_node(&ggtt->error_capture);
+}
+
+static int init_ggtt(struct i915_ggtt *ggtt)
+{
+ /*
+ * Let GEM Manage all of the aperture.
+ *
+ * However, leave one page at the end still bound to the scratch page.
+ * There are a number of places where the hardware apparently prefetches
+ * past the end of the object, and we've seen multiple hangs with the
+ * GPU head pointer stuck in a batchbuffer bound at the last page of the
+ * aperture. One page should be enough to keep any prefetching inside
+ * of the aperture.
+ */
+ unsigned long hole_start, hole_end;
+ struct drm_mm_node *entry;
+ int ret;
+
+ /*
+ * GuC requires all resources that we're sharing with it to be placed in
+ * non-WOPCM memory. If GuC is not present or not in use we still need a
+ * small bias as ring wraparound at offset 0 sometimes hangs. No idea
+ * why.
+ */
+ ggtt->pin_bias = max_t(u32, I915_GTT_PAGE_SIZE,
+ intel_wopcm_guc_size(&ggtt->vm.i915->wopcm));
+
+ ret = intel_vgt_balloon(ggtt);
+ if (ret)
+ return ret;
+
+ if (ggtt->mappable_end) {
+ /* Reserve a mappable slot for our lockless error capture */
+ ret = drm_mm_insert_node_in_range(&ggtt->vm.mm,
+ &ggtt->error_capture,
+ PAGE_SIZE, 0,
+ I915_COLOR_UNEVICTABLE,
+ 0, ggtt->mappable_end,
+ DRM_MM_INSERT_LOW);
+ if (ret)
+ return ret;
+ }
+
+ /*
+ * The upper portion of the GuC address space has a sizeable hole
+ * (several MB) that is inaccessible by GuC. Reserve this range within
+ * GGTT as it can comfortably hold GuC/HuC firmware images.
+ */
+ ret = ggtt_reserve_guc_top(ggtt);
+ if (ret)
+ goto err;
+
+ /* Clear any non-preallocated blocks */
+ drm_mm_for_each_hole(entry, &ggtt->vm.mm, hole_start, hole_end) {
+ DRM_DEBUG_KMS("clearing unused GTT space: [%lx, %lx]\n",
+ hole_start, hole_end);
+ ggtt->vm.clear_range(&ggtt->vm, hole_start,
+ hole_end - hole_start);
+ }
+
+ /* And finally clear the reserved guard page */
+ ggtt->vm.clear_range(&ggtt->vm, ggtt->vm.total - PAGE_SIZE, PAGE_SIZE);
+
+ return 0;
+
+err:
+ cleanup_init_ggtt(ggtt);
+ return ret;
+}
+
+static int aliasing_gtt_bind_vma(struct i915_vma *vma,
+ enum i915_cache_level cache_level,
+ u32 flags)
+{
+ struct drm_i915_private *i915 = vma->vm->i915;
+ u32 pte_flags;
+ int ret;
+
+ /* Currently applicable only to VLV */
+ pte_flags = 0;
+ if (i915_gem_object_is_readonly(vma->obj))
+ pte_flags |= PTE_READ_ONLY;
+
+ if (flags & I915_VMA_LOCAL_BIND) {
+ struct i915_ppgtt *alias = i915_vm_to_ggtt(vma->vm)->alias;
+
+ if (flags & I915_VMA_ALLOC) {
+ ret = alias->vm.allocate_va_range(&alias->vm,
+ vma->node.start,
+ vma->size);
+ if (ret)
+ return ret;
+
+ set_bit(I915_VMA_ALLOC_BIT, __i915_vma_flags(vma));
+ }
+
+ GEM_BUG_ON(!test_bit(I915_VMA_ALLOC_BIT,
+ __i915_vma_flags(vma)));
+ alias->vm.insert_entries(&alias->vm, vma,
+ cache_level, pte_flags);
+ }
+
+ if (flags & I915_VMA_GLOBAL_BIND) {
+ intel_wakeref_t wakeref;
+
+ with_intel_runtime_pm(&i915->runtime_pm, wakeref) {
+ vma->vm->insert_entries(vma->vm, vma,
+ cache_level, pte_flags);
+ }
+ }
+
+ return 0;
+}
+
+static void aliasing_gtt_unbind_vma(struct i915_vma *vma)
+{
+ struct drm_i915_private *i915 = vma->vm->i915;
+
+ if (i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND)) {
+ struct i915_address_space *vm = vma->vm;
+ intel_wakeref_t wakeref;
+
+ with_intel_runtime_pm(&i915->runtime_pm, wakeref)
+ vm->clear_range(vm, vma->node.start, vma->size);
+ }
+
+ if (test_and_clear_bit(I915_VMA_ALLOC_BIT, __i915_vma_flags(vma))) {
+ struct i915_address_space *vm =
+ &i915_vm_to_ggtt(vma->vm)->alias->vm;
+
+ vm->clear_range(vm, vma->node.start, vma->size);
+ }
+}
+
+static int init_aliasing_ppgtt(struct i915_ggtt *ggtt)
+{
+ struct i915_ppgtt *ppgtt;
+ int err;
+
+ ppgtt = i915_ppgtt_create(ggtt->vm.gt);
+ if (IS_ERR(ppgtt))
+ return PTR_ERR(ppgtt);
+
+ if (GEM_WARN_ON(ppgtt->vm.total < ggtt->vm.total)) {
+ err = -ENODEV;
+ goto err_ppgtt;
+ }
+
+ /*
+ * Note we only pre-allocate as far as the end of the global
+ * GTT. On 48b / 4-level page-tables, the difference is very,
+ * very significant! We have to preallocate as GVT/vgpu does
+ * not like the page directory disappearing.
+ */
+ err = ppgtt->vm.allocate_va_range(&ppgtt->vm, 0, ggtt->vm.total);
+ if (err)
+ goto err_ppgtt;
+
+ ggtt->alias = ppgtt;
+ ggtt->vm.bind_async_flags |= ppgtt->vm.bind_async_flags;
+
+ GEM_BUG_ON(ggtt->vm.vma_ops.bind_vma != ggtt_bind_vma);
+ ggtt->vm.vma_ops.bind_vma = aliasing_gtt_bind_vma;
+
+ GEM_BUG_ON(ggtt->vm.vma_ops.unbind_vma != ggtt_unbind_vma);
+ ggtt->vm.vma_ops.unbind_vma = aliasing_gtt_unbind_vma;
+
+ return 0;
+
+err_ppgtt:
+ i915_vm_put(&ppgtt->vm);
+ return err;
+}
+
+static void fini_aliasing_ppgtt(struct i915_ggtt *ggtt)
+{
+ struct i915_ppgtt *ppgtt;
+
+ ppgtt = fetch_and_zero(&ggtt->alias);
+ if (!ppgtt)
+ return;
+
+ i915_vm_put(&ppgtt->vm);
+
+ ggtt->vm.vma_ops.bind_vma = ggtt_bind_vma;
+ ggtt->vm.vma_ops.unbind_vma = ggtt_unbind_vma;
+}
+
+int i915_init_ggtt(struct drm_i915_private *i915)
+{
+ int ret;
+
+ ret = init_ggtt(&i915->ggtt);
+ if (ret)
+ return ret;
+
+ if (INTEL_PPGTT(i915) == INTEL_PPGTT_ALIASING) {
+ ret = init_aliasing_ppgtt(&i915->ggtt);
+ if (ret)
+ cleanup_init_ggtt(&i915->ggtt);
+ }
+
+ return 0;
+}
+
+static void ggtt_cleanup_hw(struct i915_ggtt *ggtt)
+{
+ struct i915_vma *vma, *vn;
+
+ atomic_set(&ggtt->vm.open, 0);
+
+ rcu_barrier(); /* flush the RCU'ed__i915_vm_release */
+ flush_workqueue(ggtt->vm.i915->wq);
+
+ mutex_lock(&ggtt->vm.mutex);
+
+ list_for_each_entry_safe(vma, vn, &ggtt->vm.bound_list, vm_link)
+ WARN_ON(__i915_vma_unbind(vma));
+
+ if (drm_mm_node_allocated(&ggtt->error_capture))
+ drm_mm_remove_node(&ggtt->error_capture);
+
+ ggtt_release_guc_top(ggtt);
+ intel_vgt_deballoon(ggtt);
+
+ ggtt->vm.cleanup(&ggtt->vm);
+
+ mutex_unlock(&ggtt->vm.mutex);
+ i915_address_space_fini(&ggtt->vm);
+
+ arch_phys_wc_del(ggtt->mtrr);
+
+ if (ggtt->iomap.size)
+ io_mapping_fini(&ggtt->iomap);
+}
+
+/**
+ * i915_ggtt_driver_release - Clean up GGTT hardware initialization
+ * @i915: i915 device
+ */
+void i915_ggtt_driver_release(struct drm_i915_private *i915)
+{
+ struct pagevec *pvec;
+
+ fini_aliasing_ppgtt(&i915->ggtt);
+
+ ggtt_cleanup_hw(&i915->ggtt);
+
+ pvec = &i915->mm.wc_stash.pvec;
+ if (pvec->nr) {
+ set_pages_array_wb(pvec->pages, pvec->nr);
+ __pagevec_release(pvec);
+ }
+}
+
+static unsigned int gen6_get_total_gtt_size(u16 snb_gmch_ctl)
+{
+ snb_gmch_ctl >>= SNB_GMCH_GGMS_SHIFT;
+ snb_gmch_ctl &= SNB_GMCH_GGMS_MASK;
+ return snb_gmch_ctl << 20;
+}
+
+static unsigned int gen8_get_total_gtt_size(u16 bdw_gmch_ctl)
+{
+ bdw_gmch_ctl >>= BDW_GMCH_GGMS_SHIFT;
+ bdw_gmch_ctl &= BDW_GMCH_GGMS_MASK;
+ if (bdw_gmch_ctl)
+ bdw_gmch_ctl = 1 << bdw_gmch_ctl;
+
+#ifdef CONFIG_X86_32
+ /* Limit 32b platforms to a 2GB GGTT: 4 << 20 / pte size * I915_GTT_PAGE_SIZE */
+ if (bdw_gmch_ctl > 4)
+ bdw_gmch_ctl = 4;
+#endif
+
+ return bdw_gmch_ctl << 20;
+}
+
+static unsigned int chv_get_total_gtt_size(u16 gmch_ctrl)
+{
+ gmch_ctrl >>= SNB_GMCH_GGMS_SHIFT;
+ gmch_ctrl &= SNB_GMCH_GGMS_MASK;
+
+ if (gmch_ctrl)
+ return 1 << (20 + gmch_ctrl);
+
+ return 0;
+}
+
+static int ggtt_probe_common(struct i915_ggtt *ggtt, u64 size)
+{
+ struct drm_i915_private *i915 = ggtt->vm.i915;
+ struct pci_dev *pdev = i915->drm.pdev;
+ phys_addr_t phys_addr;
+ int ret;
+
+ /* For Modern GENs the PTEs and register space are split in the BAR */
+ phys_addr = pci_resource_start(pdev, 0) + pci_resource_len(pdev, 0) / 2;
+
+ /*
+ * On BXT+/CNL+ writes larger than 64 bit to the GTT pagetable range
+ * will be dropped. For WC mappings in general we have 64 byte burst
+ * writes when the WC buffer is flushed, so we can't use it, but have to
+ * resort to an uncached mapping. The WC issue is easily caught by the
+ * readback check when writing GTT PTE entries.
+ */
+ if (IS_GEN9_LP(i915) || INTEL_GEN(i915) >= 10)
+ ggtt->gsm = ioremap_nocache(phys_addr, size);
+ else
+ ggtt->gsm = ioremap_wc(phys_addr, size);
+ if (!ggtt->gsm) {
+ DRM_ERROR("Failed to map the ggtt page table\n");
+ return -ENOMEM;
+ }
+
+ ret = setup_scratch_page(&ggtt->vm, GFP_DMA32);
+ if (ret) {
+ DRM_ERROR("Scratch setup failed\n");
+ /* iounmap will also get called at remove, but meh */
+ iounmap(ggtt->gsm);
+ return ret;
+ }
+
+ ggtt->vm.scratch[0].encode =
+ ggtt->vm.pte_encode(px_dma(&ggtt->vm.scratch[0]),
+ I915_CACHE_NONE, 0);
+
+ return 0;
+}
+
+int ggtt_set_pages(struct i915_vma *vma)
+{
+ int ret;
+
+ GEM_BUG_ON(vma->pages);
+
+ ret = i915_get_ggtt_vma_pages(vma);
+ if (ret)
+ return ret;
+
+ vma->page_sizes = vma->obj->mm.page_sizes;
+
+ return 0;
+}
+
+static void gen6_gmch_remove(struct i915_address_space *vm)
+{
+ struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
+
+ iounmap(ggtt->gsm);
+ cleanup_scratch_page(vm);
+}
+
+static struct resource pci_resource(struct pci_dev *pdev, int bar)
+{
+ return (struct resource)DEFINE_RES_MEM(pci_resource_start(pdev, bar),
+ pci_resource_len(pdev, bar));
+}
+
+static int gen8_gmch_probe(struct i915_ggtt *ggtt)
+{
+ struct drm_i915_private *i915 = ggtt->vm.i915;
+ struct pci_dev *pdev = i915->drm.pdev;
+ unsigned int size;
+ u16 snb_gmch_ctl;
+ int err;
+
+ /* TODO: We're not aware of mappable constraints on gen8 yet */
+ if (!IS_DGFX(i915)) {
+ ggtt->gmadr = pci_resource(pdev, 2);
+ ggtt->mappable_end = resource_size(&ggtt->gmadr);
+ }
+
+ err = pci_set_dma_mask(pdev, DMA_BIT_MASK(39));
+ if (!err)
+ err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(39));
+ if (err)
+ DRM_ERROR("Can't set DMA mask/consistent mask (%d)\n", err);
+
+ pci_read_config_word(pdev, SNB_GMCH_CTRL, &snb_gmch_ctl);
+ if (IS_CHERRYVIEW(i915))
+ size = chv_get_total_gtt_size(snb_gmch_ctl);
+ else
+ size = gen8_get_total_gtt_size(snb_gmch_ctl);
+
+ ggtt->vm.total = (size / sizeof(gen8_pte_t)) * I915_GTT_PAGE_SIZE;
+ ggtt->vm.cleanup = gen6_gmch_remove;
+ ggtt->vm.insert_page = gen8_ggtt_insert_page;
+ ggtt->vm.clear_range = nop_clear_range;
+ if (intel_scanout_needs_vtd_wa(i915))
+ ggtt->vm.clear_range = gen8_ggtt_clear_range;
+
+ ggtt->vm.insert_entries = gen8_ggtt_insert_entries;
+
+ /* Serialize GTT updates with aperture access on BXT if VT-d is on. */
+ if (intel_ggtt_update_needs_vtd_wa(i915) ||
+ IS_CHERRYVIEW(i915) /* fails with concurrent use/update */) {
+ ggtt->vm.insert_entries = bxt_vtd_ggtt_insert_entries__BKL;
+ ggtt->vm.insert_page = bxt_vtd_ggtt_insert_page__BKL;
+ if (ggtt->vm.clear_range != nop_clear_range)
+ ggtt->vm.clear_range = bxt_vtd_ggtt_clear_range__BKL;
+ }
+
+ ggtt->invalidate = gen8_ggtt_invalidate;
+
+ ggtt->vm.vma_ops.bind_vma = ggtt_bind_vma;
+ ggtt->vm.vma_ops.unbind_vma = ggtt_unbind_vma;
+ ggtt->vm.vma_ops.set_pages = ggtt_set_pages;
+ ggtt->vm.vma_ops.clear_pages = clear_pages;
+
+ ggtt->vm.pte_encode = gen8_pte_encode;
+
+ setup_private_pat(ggtt->vm.gt->uncore);
+
+ return ggtt_probe_common(ggtt, size);
+}
+
+static u64 snb_pte_encode(dma_addr_t addr,
+ enum i915_cache_level level,
+ u32 flags)
+{
+ gen6_pte_t pte = GEN6_PTE_ADDR_ENCODE(addr) | GEN6_PTE_VALID;
+
+ switch (level) {
+ case I915_CACHE_L3_LLC:
+ case I915_CACHE_LLC:
+ pte |= GEN6_PTE_CACHE_LLC;
+ break;
+ case I915_CACHE_NONE:
+ pte |= GEN6_PTE_UNCACHED;
+ break;
+ default:
+ MISSING_CASE(level);
+ }
+
+ return pte;
+}
+
+static u64 ivb_pte_encode(dma_addr_t addr,
+ enum i915_cache_level level,
+ u32 flags)
+{
+ gen6_pte_t pte = GEN6_PTE_ADDR_ENCODE(addr) | GEN6_PTE_VALID;
+
+ switch (level) {
+ case I915_CACHE_L3_LLC:
+ pte |= GEN7_PTE_CACHE_L3_LLC;
+ break;
+ case I915_CACHE_LLC:
+ pte |= GEN6_PTE_CACHE_LLC;
+ break;
+ case I915_CACHE_NONE:
+ pte |= GEN6_PTE_UNCACHED;
+ break;
+ default:
+ MISSING_CASE(level);
+ }
+
+ return pte;
+}
+
+static u64 byt_pte_encode(dma_addr_t addr,
+ enum i915_cache_level level,
+ u32 flags)
+{
+ gen6_pte_t pte = GEN6_PTE_ADDR_ENCODE(addr) | GEN6_PTE_VALID;
+
+ if (!(flags & PTE_READ_ONLY))
+ pte |= BYT_PTE_WRITEABLE;
+
+ if (level != I915_CACHE_NONE)
+ pte |= BYT_PTE_SNOOPED_BY_CPU_CACHES;
+
+ return pte;
+}
+
+static u64 hsw_pte_encode(dma_addr_t addr,
+ enum i915_cache_level level,
+ u32 flags)
+{
+ gen6_pte_t pte = HSW_PTE_ADDR_ENCODE(addr) | GEN6_PTE_VALID;
+
+ if (level != I915_CACHE_NONE)
+ pte |= HSW_WB_LLC_AGE3;
+
+ return pte;
+}
+
+static u64 iris_pte_encode(dma_addr_t addr,
+ enum i915_cache_level level,
+ u32 flags)
+{
+ gen6_pte_t pte = HSW_PTE_ADDR_ENCODE(addr) | GEN6_PTE_VALID;
+
+ switch (level) {
+ case I915_CACHE_NONE:
+ break;
+ case I915_CACHE_WT:
+ pte |= HSW_WT_ELLC_LLC_AGE3;
+ break;
+ default:
+ pte |= HSW_WB_ELLC_LLC_AGE3;
+ break;
+ }
+
+ return pte;
+}
+
+static int gen6_gmch_probe(struct i915_ggtt *ggtt)
+{
+ struct drm_i915_private *i915 = ggtt->vm.i915;
+ struct pci_dev *pdev = i915->drm.pdev;
+ unsigned int size;
+ u16 snb_gmch_ctl;
+ int err;
+
+ ggtt->gmadr = pci_resource(pdev, 2);
+ ggtt->mappable_end = resource_size(&ggtt->gmadr);
+
+ /*
+ * 64/512MB is the current min/max we actually know of, but this is
+ * just a coarse sanity check.
+ */
+ if (ggtt->mappable_end < (64<<20) || ggtt->mappable_end > (512<<20)) {
+ DRM_ERROR("Unknown GMADR size (%pa)\n", &ggtt->mappable_end);
+ return -ENXIO;
+ }
+
+ err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
+ if (!err)
+ err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
+ if (err)
+ DRM_ERROR("Can't set DMA mask/consistent mask (%d)\n", err);
+ pci_read_config_word(pdev, SNB_GMCH_CTRL, &snb_gmch_ctl);
+
+ size = gen6_get_total_gtt_size(snb_gmch_ctl);
+ ggtt->vm.total = (size / sizeof(gen6_pte_t)) * I915_GTT_PAGE_SIZE;
+
+ ggtt->vm.clear_range = nop_clear_range;
+ if (!HAS_FULL_PPGTT(i915) || intel_scanout_needs_vtd_wa(i915))
+ ggtt->vm.clear_range = gen6_ggtt_clear_range;
+ ggtt->vm.insert_page = gen6_ggtt_insert_page;
+ ggtt->vm.insert_entries = gen6_ggtt_insert_entries;
+ ggtt->vm.cleanup = gen6_gmch_remove;
+
+ ggtt->invalidate = gen6_ggtt_invalidate;
+
+ if (HAS_EDRAM(i915))
+ ggtt->vm.pte_encode = iris_pte_encode;
+ else if (IS_HASWELL(i915))
+ ggtt->vm.pte_encode = hsw_pte_encode;
+ else if (IS_VALLEYVIEW(i915))
+ ggtt->vm.pte_encode = byt_pte_encode;
+ else if (INTEL_GEN(i915) >= 7)
+ ggtt->vm.pte_encode = ivb_pte_encode;
+ else
+ ggtt->vm.pte_encode = snb_pte_encode;
+
+ ggtt->vm.vma_ops.bind_vma = ggtt_bind_vma;
+ ggtt->vm.vma_ops.unbind_vma = ggtt_unbind_vma;
+ ggtt->vm.vma_ops.set_pages = ggtt_set_pages;
+ ggtt->vm.vma_ops.clear_pages = clear_pages;
+
+ return ggtt_probe_common(ggtt, size);
+}
+
+static void i915_gmch_remove(struct i915_address_space *vm)
+{
+ intel_gmch_remove();
+}
+
+static int i915_gmch_probe(struct i915_ggtt *ggtt)
+{
+ struct drm_i915_private *i915 = ggtt->vm.i915;
+ phys_addr_t gmadr_base;
+ int ret;
+
+ ret = intel_gmch_probe(i915->bridge_dev, i915->drm.pdev, NULL);
+ if (!ret) {
+ DRM_ERROR("failed to set up gmch\n");
+ return -EIO;
+ }
+
+ intel_gtt_get(&ggtt->vm.total, &gmadr_base, &ggtt->mappable_end);
+
+ ggtt->gmadr =
+ (struct resource)DEFINE_RES_MEM(gmadr_base, ggtt->mappable_end);
+
+ ggtt->do_idle_maps = needs_idle_maps(i915);
+ ggtt->vm.insert_page = i915_ggtt_insert_page;
+ ggtt->vm.insert_entries = i915_ggtt_insert_entries;
+ ggtt->vm.clear_range = i915_ggtt_clear_range;
+ ggtt->vm.cleanup = i915_gmch_remove;
+
+ ggtt->invalidate = gmch_ggtt_invalidate;
+
+ ggtt->vm.vma_ops.bind_vma = ggtt_bind_vma;
+ ggtt->vm.vma_ops.unbind_vma = ggtt_unbind_vma;
+ ggtt->vm.vma_ops.set_pages = ggtt_set_pages;
+ ggtt->vm.vma_ops.clear_pages = clear_pages;
+
+ if (unlikely(ggtt->do_idle_maps))
+ dev_notice(i915->drm.dev,
+ "Applying Ironlake quirks for intel_iommu\n");
+
+ return 0;
+}
+
+static int ggtt_probe_hw(struct i915_ggtt *ggtt, struct intel_gt *gt)
+{
+ struct drm_i915_private *i915 = gt->i915;
+ int ret;
+
+ ggtt->vm.gt = gt;
+ ggtt->vm.i915 = i915;
+ ggtt->vm.dma = &i915->drm.pdev->dev;
+
+ if (INTEL_GEN(i915) <= 5)
+ ret = i915_gmch_probe(ggtt);
+ else if (INTEL_GEN(i915) < 8)
+ ret = gen6_gmch_probe(ggtt);
+ else
+ ret = gen8_gmch_probe(ggtt);
+ if (ret)
+ return ret;
+
+ if ((ggtt->vm.total - 1) >> 32) {
+ DRM_ERROR("We never expected a Global GTT with more than 32bits"
+ " of address space! Found %lldM!\n",
+ ggtt->vm.total >> 20);
+ ggtt->vm.total = 1ULL << 32;
+ ggtt->mappable_end =
+ min_t(u64, ggtt->mappable_end, ggtt->vm.total);
+ }
+
+ if (ggtt->mappable_end > ggtt->vm.total) {
+ DRM_ERROR("mappable aperture extends past end of GGTT,"
+ " aperture=%pa, total=%llx\n",
+ &ggtt->mappable_end, ggtt->vm.total);
+ ggtt->mappable_end = ggtt->vm.total;
+ }
+
+ /* GMADR is the PCI mmio aperture into the global GTT. */
+ DRM_DEBUG_DRIVER("GGTT size = %lluM\n", ggtt->vm.total >> 20);
+ DRM_DEBUG_DRIVER("GMADR size = %lluM\n", (u64)ggtt->mappable_end >> 20);
+ DRM_DEBUG_DRIVER("DSM size = %lluM\n",
+ (u64)resource_size(&intel_graphics_stolen_res) >> 20);
+
+ return 0;
+}
+
+/**
+ * i915_ggtt_probe_hw - Probe GGTT hardware location
+ * @i915: i915 device
+ */
+int i915_ggtt_probe_hw(struct drm_i915_private *i915)
+{
+ int ret;
+
+ ret = ggtt_probe_hw(&i915->ggtt, &i915->gt);
+ if (ret)
+ return ret;
+
+ if (intel_vtd_active())
+ dev_info(i915->drm.dev, "VT-d active for gfx access\n");
+
+ return 0;
+}
+
+int i915_ggtt_enable_hw(struct drm_i915_private *i915)
+{
+ if (INTEL_GEN(i915) < 6 && !intel_enable_gtt())
+ return -EIO;
+
+ return 0;
+}
+
+void i915_ggtt_enable_guc(struct i915_ggtt *ggtt)
+{
+ GEM_BUG_ON(ggtt->invalidate != gen8_ggtt_invalidate);
+
+ ggtt->invalidate = guc_ggtt_invalidate;
+
+ ggtt->invalidate(ggtt);
+}
+
+void i915_ggtt_disable_guc(struct i915_ggtt *ggtt)
+{
+ /* XXX Temporary pardon for error unload */
+ if (ggtt->invalidate == gen8_ggtt_invalidate)
+ return;
+
+ /* We should only be called after i915_ggtt_enable_guc() */
+ GEM_BUG_ON(ggtt->invalidate != guc_ggtt_invalidate);
+
+ ggtt->invalidate = gen8_ggtt_invalidate;
+
+ ggtt->invalidate(ggtt);
+}
+
+static void ggtt_restore_mappings(struct i915_ggtt *ggtt)
+{
+ struct i915_vma *vma, *vn;
+ bool flush = false;
+ int open;
+
+ intel_gt_check_and_clear_faults(ggtt->vm.gt);
+
+ mutex_lock(&ggtt->vm.mutex);
+
+ /* First fill our portion of the GTT with scratch pages */
+ ggtt->vm.clear_range(&ggtt->vm, 0, ggtt->vm.total);
+
+ /* Skip rewriting PTE on VMA unbind. */
+ open = atomic_xchg(&ggtt->vm.open, 0);
+
+ /* clflush objects bound into the GGTT and rebind them. */
+ list_for_each_entry_safe(vma, vn, &ggtt->vm.bound_list, vm_link) {
+ struct drm_i915_gem_object *obj = vma->obj;
+
+ if (!i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND))
+ continue;
+
+ if (!__i915_vma_unbind(vma))
+ continue;
+
+ clear_bit(I915_VMA_GLOBAL_BIND_BIT, __i915_vma_flags(vma));
+ WARN_ON(i915_vma_bind(vma,
+ obj ? obj->cache_level : 0,
+ PIN_GLOBAL, NULL));
+ if (obj) { /* only used during resume => exclusive access */
+ flush |= fetch_and_zero(&obj->write_domain);
+ obj->read_domains |= I915_GEM_DOMAIN_GTT;
+ }
+ }
+
+ atomic_set(&ggtt->vm.open, open);
+ ggtt->invalidate(ggtt);
+
+ mutex_unlock(&ggtt->vm.mutex);
+
+ if (flush)
+ wbinvd_on_all_cpus();
+}
+
+void i915_gem_restore_gtt_mappings(struct drm_i915_private *i915)
+{
+ struct i915_ggtt *ggtt = &i915->ggtt;
+
+ ggtt_restore_mappings(ggtt);
+
+ if (INTEL_GEN(i915) >= 8)
+ setup_private_pat(ggtt->vm.gt->uncore);
+}
+
+static struct scatterlist *
+rotate_pages(struct drm_i915_gem_object *obj, unsigned int offset,
+ unsigned int width, unsigned int height,
+ unsigned int stride,
+ struct sg_table *st, struct scatterlist *sg)
+{
+ unsigned int column, row;
+ unsigned int src_idx;
+
+ for (column = 0; column < width; column++) {
+ src_idx = stride * (height - 1) + column + offset;
+ for (row = 0; row < height; row++) {
+ st->nents++;
+ /*
+ * We don't need the pages, but need to initialize
+ * the entries so the sg list can be happily traversed.
+ * The only thing we need are DMA addresses.
+ */
+ sg_set_page(sg, NULL, I915_GTT_PAGE_SIZE, 0);
+ sg_dma_address(sg) =
+ i915_gem_object_get_dma_address(obj, src_idx);
+ sg_dma_len(sg) = I915_GTT_PAGE_SIZE;
+ sg = sg_next(sg);
+ src_idx -= stride;
+ }
+ }
+
+ return sg;
+}
+
+static noinline struct sg_table *
+intel_rotate_pages(struct intel_rotation_info *rot_info,
+ struct drm_i915_gem_object *obj)
+{
+ unsigned int size = intel_rotation_info_size(rot_info);
+ struct sg_table *st;
+ struct scatterlist *sg;
+ int ret = -ENOMEM;
+ int i;
+
+ /* Allocate target SG list. */
+ st = kmalloc(sizeof(*st), GFP_KERNEL);
+ if (!st)
+ goto err_st_alloc;
+
+ ret = sg_alloc_table(st, size, GFP_KERNEL);
+ if (ret)
+ goto err_sg_alloc;
+
+ st->nents = 0;
+ sg = st->sgl;
+
+ for (i = 0 ; i < ARRAY_SIZE(rot_info->plane); i++) {
+ sg = rotate_pages(obj, rot_info->plane[i].offset,
+ rot_info->plane[i].width, rot_info->plane[i].height,
+ rot_info->plane[i].stride, st, sg);
+ }
+
+ return st;
+
+err_sg_alloc:
+ kfree(st);
+err_st_alloc:
+
+ DRM_DEBUG_DRIVER("Failed to create rotated mapping for object size %zu! (%ux%u tiles, %u pages)\n",
+ obj->base.size, rot_info->plane[0].width, rot_info->plane[0].height, size);
+
+ return ERR_PTR(ret);
+}
+
+static struct scatterlist *
+remap_pages(struct drm_i915_gem_object *obj, unsigned int offset,
+ unsigned int width, unsigned int height,
+ unsigned int stride,
+ struct sg_table *st, struct scatterlist *sg)
+{
+ unsigned int row;
+
+ for (row = 0; row < height; row++) {
+ unsigned int left = width * I915_GTT_PAGE_SIZE;
+
+ while (left) {
+ dma_addr_t addr;
+ unsigned int length;
+
+ /*
+ * We don't need the pages, but need to initialize
+ * the entries so the sg list can be happily traversed.
+ * The only thing we need are DMA addresses.
+ */
+
+ addr = i915_gem_object_get_dma_address_len(obj, offset, &length);
+
+ length = min(left, length);
+
+ st->nents++;
+
+ sg_set_page(sg, NULL, length, 0);
+ sg_dma_address(sg) = addr;
+ sg_dma_len(sg) = length;
+ sg = sg_next(sg);
+
+ offset += length / I915_GTT_PAGE_SIZE;
+ left -= length;
+ }
+
+ offset += stride - width;
+ }
+
+ return sg;
+}
+
+static noinline struct sg_table *
+intel_remap_pages(struct intel_remapped_info *rem_info,
+ struct drm_i915_gem_object *obj)
+{
+ unsigned int size = intel_remapped_info_size(rem_info);
+ struct sg_table *st;
+ struct scatterlist *sg;
+ int ret = -ENOMEM;
+ int i;
+
+ /* Allocate target SG list. */
+ st = kmalloc(sizeof(*st), GFP_KERNEL);
+ if (!st)
+ goto err_st_alloc;
+
+ ret = sg_alloc_table(st, size, GFP_KERNEL);
+ if (ret)
+ goto err_sg_alloc;
+
+ st->nents = 0;
+ sg = st->sgl;
+
+ for (i = 0 ; i < ARRAY_SIZE(rem_info->plane); i++) {
+ sg = remap_pages(obj, rem_info->plane[i].offset,
+ rem_info->plane[i].width, rem_info->plane[i].height,
+ rem_info->plane[i].stride, st, sg);
+ }
+
+ i915_sg_trim(st);
+
+ return st;
+
+err_sg_alloc:
+ kfree(st);
+err_st_alloc:
+
+ DRM_DEBUG_DRIVER("Failed to create remapped mapping for object size %zu! (%ux%u tiles, %u pages)\n",
+ obj->base.size, rem_info->plane[0].width, rem_info->plane[0].height, size);
+
+ return ERR_PTR(ret);
+}
+
+static noinline struct sg_table *
+intel_partial_pages(const struct i915_ggtt_view *view,
+ struct drm_i915_gem_object *obj)
+{
+ struct sg_table *st;
+ struct scatterlist *sg, *iter;
+ unsigned int count = view->partial.size;
+ unsigned int offset;
+ int ret = -ENOMEM;
+
+ st = kmalloc(sizeof(*st), GFP_KERNEL);
+ if (!st)
+ goto err_st_alloc;
+
+ ret = sg_alloc_table(st, count, GFP_KERNEL);
+ if (ret)
+ goto err_sg_alloc;
+
+ iter = i915_gem_object_get_sg(obj, view->partial.offset, &offset);
+ GEM_BUG_ON(!iter);
+
+ sg = st->sgl;
+ st->nents = 0;
+ do {
+ unsigned int len;
+
+ len = min(iter->length - (offset << PAGE_SHIFT),
+ count << PAGE_SHIFT);
+ sg_set_page(sg, NULL, len, 0);
+ sg_dma_address(sg) =
+ sg_dma_address(iter) + (offset << PAGE_SHIFT);
+ sg_dma_len(sg) = len;
+
+ st->nents++;
+ count -= len >> PAGE_SHIFT;
+ if (count == 0) {
+ sg_mark_end(sg);
+ i915_sg_trim(st); /* Drop any unused tail entries. */
+
+ return st;
+ }
+
+ sg = __sg_next(sg);
+ iter = __sg_next(iter);
+ offset = 0;
+ } while (1);
+
+err_sg_alloc:
+ kfree(st);
+err_st_alloc:
+ return ERR_PTR(ret);
+}
+
+static int
+i915_get_ggtt_vma_pages(struct i915_vma *vma)
+{
+ int ret;
+
+ /*
+ * The vma->pages are only valid within the lifespan of the borrowed
+ * obj->mm.pages. When the obj->mm.pages sg_table is regenerated, so
+ * must be the vma->pages. A simple rule is that vma->pages must only
+ * be accessed when the obj->mm.pages are pinned.
+ */
+ GEM_BUG_ON(!i915_gem_object_has_pinned_pages(vma->obj));
+
+ switch (vma->ggtt_view.type) {
+ default:
+ GEM_BUG_ON(vma->ggtt_view.type);
+ /* fall through */
+ case I915_GGTT_VIEW_NORMAL:
+ vma->pages = vma->obj->mm.pages;
+ return 0;
+
+ case I915_GGTT_VIEW_ROTATED:
+ vma->pages =
+ intel_rotate_pages(&vma->ggtt_view.rotated, vma->obj);
+ break;
+
+ case I915_GGTT_VIEW_REMAPPED:
+ vma->pages =
+ intel_remap_pages(&vma->ggtt_view.remapped, vma->obj);
+ break;
+
+ case I915_GGTT_VIEW_PARTIAL:
+ vma->pages = intel_partial_pages(&vma->ggtt_view, vma->obj);
+ break;
+ }
+
+ ret = 0;
+ if (IS_ERR(vma->pages)) {
+ ret = PTR_ERR(vma->pages);
+ vma->pages = NULL;
+ DRM_ERROR("Failed to get pages for VMA view type %u (%d)!\n",
+ vma->ggtt_view.type, ret);
+ }
+ return ret;
+}
static struct i915_address_space *kernel_vm(struct intel_gt *gt)
{
if (INTEL_PPGTT(gt->i915) > INTEL_PPGTT_ALIASING)
- return &i915_ppgtt_create(gt->i915)->vm;
+ return &i915_ppgtt_create(gt)->vm;
else
return i915_vm_get(>->ggtt->vm);
}
--- /dev/null
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+
+#include <linux/slab.h> /* fault-inject.h is not standalone! */
+
+#include <linux/fault-inject.h>
+
+#include "i915_trace.h"
+#include "intel_gt.h"
+#include "intel_gtt.h"
+
+void stash_init(struct pagestash *stash)
+{
+ pagevec_init(&stash->pvec);
+ spin_lock_init(&stash->lock);
+}
+
+static struct page *stash_pop_page(struct pagestash *stash)
+{
+ struct page *page = NULL;
+
+ spin_lock(&stash->lock);
+ if (likely(stash->pvec.nr))
+ page = stash->pvec.pages[--stash->pvec.nr];
+ spin_unlock(&stash->lock);
+
+ return page;
+}
+
+static void stash_push_pagevec(struct pagestash *stash, struct pagevec *pvec)
+{
+ unsigned int nr;
+
+ spin_lock_nested(&stash->lock, SINGLE_DEPTH_NESTING);
+
+ nr = min_t(typeof(nr), pvec->nr, pagevec_space(&stash->pvec));
+ memcpy(stash->pvec.pages + stash->pvec.nr,
+ pvec->pages + pvec->nr - nr,
+ sizeof(pvec->pages[0]) * nr);
+ stash->pvec.nr += nr;
+
+ spin_unlock(&stash->lock);
+
+ pvec->nr -= nr;
+}
+
+static struct page *vm_alloc_page(struct i915_address_space *vm, gfp_t gfp)
+{
+ struct pagevec stack;
+ struct page *page;
+
+ if (I915_SELFTEST_ONLY(should_fail(&vm->fault_attr, 1)))
+ i915_gem_shrink_all(vm->i915);
+
+ page = stash_pop_page(&vm->free_pages);
+ if (page)
+ return page;
+
+ if (!vm->pt_kmap_wc)
+ return alloc_page(gfp);
+
+ /* Look in our global stash of WC pages... */
+ page = stash_pop_page(&vm->i915->mm.wc_stash);
+ if (page)
+ return page;
+
+ /*
+ * Otherwise batch allocate pages to amortize cost of set_pages_wc.
+ *
+ * We have to be careful as page allocation may trigger the shrinker
+ * (via direct reclaim) which will fill up the WC stash underneath us.
+ * So we add our WB pages into a temporary pvec on the stack and merge
+ * them into the WC stash after all the allocations are complete.
+ */
+ pagevec_init(&stack);
+ do {
+ struct page *page;
+
+ page = alloc_page(gfp);
+ if (unlikely(!page))
+ break;
+
+ stack.pages[stack.nr++] = page;
+ } while (pagevec_space(&stack));
+
+ if (stack.nr && !set_pages_array_wc(stack.pages, stack.nr)) {
+ page = stack.pages[--stack.nr];
+
+ /* Merge spare WC pages to the global stash */
+ if (stack.nr)
+ stash_push_pagevec(&vm->i915->mm.wc_stash, &stack);
+
+ /* Push any surplus WC pages onto the local VM stash */
+ if (stack.nr)
+ stash_push_pagevec(&vm->free_pages, &stack);
+ }
+
+ /* Return unwanted leftovers */
+ if (unlikely(stack.nr)) {
+ WARN_ON_ONCE(set_pages_array_wb(stack.pages, stack.nr));
+ __pagevec_release(&stack);
+ }
+
+ return page;
+}
+
+static void vm_free_pages_release(struct i915_address_space *vm,
+ bool immediate)
+{
+ struct pagevec *pvec = &vm->free_pages.pvec;
+ struct pagevec stack;
+
+ lockdep_assert_held(&vm->free_pages.lock);
+ GEM_BUG_ON(!pagevec_count(pvec));
+
+ if (vm->pt_kmap_wc) {
+ /*
+ * When we use WC, first fill up the global stash and then
+ * only if full immediately free the overflow.
+ */
+ stash_push_pagevec(&vm->i915->mm.wc_stash, pvec);
+
+ /*
+ * As we have made some room in the VM's free_pages,
+ * we can wait for it to fill again. Unless we are
+ * inside i915_address_space_fini() and must
+ * immediately release the pages!
+ */
+ if (pvec->nr <= (immediate ? 0 : PAGEVEC_SIZE - 1))
+ return;
+
+ /*
+ * We have to drop the lock to allow ourselves to sleep,
+ * so take a copy of the pvec and clear the stash for
+ * others to use it as we sleep.
+ */
+ stack = *pvec;
+ pagevec_reinit(pvec);
+ spin_unlock(&vm->free_pages.lock);
+
+ pvec = &stack;
+ set_pages_array_wb(pvec->pages, pvec->nr);
+
+ spin_lock(&vm->free_pages.lock);
+ }
+
+ __pagevec_release(pvec);
+}
+
+static void vm_free_page(struct i915_address_space *vm, struct page *page)
+{
+ /*
+ * On !llc, we need to change the pages back to WB. We only do so
+ * in bulk, so we rarely need to change the page attributes here,
+ * but doing so requires a stop_machine() from deep inside arch/x86/mm.
+ * To make detection of the possible sleep more likely, use an
+ * unconditional might_sleep() for everybody.
+ */
+ might_sleep();
+ spin_lock(&vm->free_pages.lock);
+ while (!pagevec_space(&vm->free_pages.pvec))
+ vm_free_pages_release(vm, false);
+ GEM_BUG_ON(pagevec_count(&vm->free_pages.pvec) >= PAGEVEC_SIZE);
+ pagevec_add(&vm->free_pages.pvec, page);
+ spin_unlock(&vm->free_pages.lock);
+}
+
+void __i915_vm_close(struct i915_address_space *vm)
+{
+ struct i915_vma *vma, *vn;
+
+ mutex_lock(&vm->mutex);
+ list_for_each_entry_safe(vma, vn, &vm->bound_list, vm_link) {
+ struct drm_i915_gem_object *obj = vma->obj;
+
+ /* Keep the obj (and hence the vma) alive as _we_ destroy it */
+ if (!kref_get_unless_zero(&obj->base.refcount))
+ continue;
+
+ atomic_and(~I915_VMA_PIN_MASK, &vma->flags);
+ WARN_ON(__i915_vma_unbind(vma));
+ __i915_vma_put(vma);
+
+ i915_gem_object_put(obj);
+ }
+ GEM_BUG_ON(!list_empty(&vm->bound_list));
+ mutex_unlock(&vm->mutex);
+}
+
+void i915_address_space_fini(struct i915_address_space *vm)
+{
+ spin_lock(&vm->free_pages.lock);
+ if (pagevec_count(&vm->free_pages.pvec))
+ vm_free_pages_release(vm, true);
+ GEM_BUG_ON(pagevec_count(&vm->free_pages.pvec));
+ spin_unlock(&vm->free_pages.lock);
+
+ drm_mm_takedown(&vm->mm);
+
+ mutex_destroy(&vm->mutex);
+}
+
+static void __i915_vm_release(struct work_struct *work)
+{
+ struct i915_address_space *vm =
+ container_of(work, struct i915_address_space, rcu.work);
+
+ vm->cleanup(vm);
+ i915_address_space_fini(vm);
+
+ kfree(vm);
+}
+
+void i915_vm_release(struct kref *kref)
+{
+ struct i915_address_space *vm =
+ container_of(kref, struct i915_address_space, ref);
+
+ GEM_BUG_ON(i915_is_ggtt(vm));
+ trace_i915_ppgtt_release(vm);
+
+ queue_rcu_work(vm->i915->wq, &vm->rcu);
+}
+
+void i915_address_space_init(struct i915_address_space *vm, int subclass)
+{
+ kref_init(&vm->ref);
+ INIT_RCU_WORK(&vm->rcu, __i915_vm_release);
+ atomic_set(&vm->open, 1);
+
+ /*
+ * The vm->mutex must be reclaim safe (for use in the shrinker).
+ * Do a dummy acquire now under fs_reclaim so that any allocation
+ * attempt holding the lock is immediately reported by lockdep.
+ */
+ mutex_init(&vm->mutex);
+ lockdep_set_subclass(&vm->mutex, subclass);
+ i915_gem_shrinker_taints_mutex(vm->i915, &vm->mutex);
+
+ GEM_BUG_ON(!vm->total);
+ drm_mm_init(&vm->mm, 0, vm->total);
+ vm->mm.head_node.color = I915_COLOR_UNEVICTABLE;
+
+ stash_init(&vm->free_pages);
+
+ INIT_LIST_HEAD(&vm->bound_list);
+}
+
+void clear_pages(struct i915_vma *vma)
+{
+ GEM_BUG_ON(!vma->pages);
+
+ if (vma->pages != vma->obj->mm.pages) {
+ sg_free_table(vma->pages);
+ kfree(vma->pages);
+ }
+ vma->pages = NULL;
+
+ memset(&vma->page_sizes, 0, sizeof(vma->page_sizes));
+}
+
+static int __setup_page_dma(struct i915_address_space *vm,
+ struct i915_page_dma *p,
+ gfp_t gfp)
+{
+ p->page = vm_alloc_page(vm, gfp | I915_GFP_ALLOW_FAIL);
+ if (unlikely(!p->page))
+ return -ENOMEM;
+
+ p->daddr = dma_map_page_attrs(vm->dma,
+ p->page, 0, PAGE_SIZE,
+ PCI_DMA_BIDIRECTIONAL,
+ DMA_ATTR_SKIP_CPU_SYNC |
+ DMA_ATTR_NO_WARN);
+ if (unlikely(dma_mapping_error(vm->dma, p->daddr))) {
+ vm_free_page(vm, p->page);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+int setup_page_dma(struct i915_address_space *vm, struct i915_page_dma *p)
+{
+ return __setup_page_dma(vm, p, __GFP_HIGHMEM);
+}
+
+void cleanup_page_dma(struct i915_address_space *vm, struct i915_page_dma *p)
+{
+ dma_unmap_page(vm->dma, p->daddr, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+ vm_free_page(vm, p->page);
+}
+
+void
+fill_page_dma(const struct i915_page_dma *p, const u64 val, unsigned int count)
+{
+ kunmap_atomic(memset64(kmap_atomic(p->page), val, count));
+}
+
+int setup_scratch_page(struct i915_address_space *vm, gfp_t gfp)
+{
+ unsigned long size;
+
+ /*
+ * In order to utilize 64K pages for an object with a size < 2M, we will
+ * need to support a 64K scratch page, given that every 16th entry for a
+ * page-table operating in 64K mode must point to a properly aligned 64K
+ * region, including any PTEs which happen to point to scratch.
+ *
+ * This is only relevant for the 48b PPGTT where we support
+ * huge-gtt-pages, see also i915_vma_insert(). However, as we share the
+ * scratch (read-only) between all vm, we create one 64k scratch page
+ * for all.
+ */
+ size = I915_GTT_PAGE_SIZE_4K;
+ if (i915_vm_is_4lvl(vm) &&
+ HAS_PAGE_SIZES(vm->i915, I915_GTT_PAGE_SIZE_64K)) {
+ size = I915_GTT_PAGE_SIZE_64K;
+ gfp |= __GFP_NOWARN;
+ }
+ gfp |= __GFP_ZERO | __GFP_RETRY_MAYFAIL;
+
+ do {
+ unsigned int order = get_order(size);
+ struct page *page;
+ dma_addr_t addr;
+
+ page = alloc_pages(gfp, order);
+ if (unlikely(!page))
+ goto skip;
+
+ addr = dma_map_page_attrs(vm->dma,
+ page, 0, size,
+ PCI_DMA_BIDIRECTIONAL,
+ DMA_ATTR_SKIP_CPU_SYNC |
+ DMA_ATTR_NO_WARN);
+ if (unlikely(dma_mapping_error(vm->dma, addr)))
+ goto free_page;
+
+ if (unlikely(!IS_ALIGNED(addr, size)))
+ goto unmap_page;
+
+ vm->scratch[0].base.page = page;
+ vm->scratch[0].base.daddr = addr;
+ vm->scratch_order = order;
+ return 0;
+
+unmap_page:
+ dma_unmap_page(vm->dma, addr, size, PCI_DMA_BIDIRECTIONAL);
+free_page:
+ __free_pages(page, order);
+skip:
+ if (size == I915_GTT_PAGE_SIZE_4K)
+ return -ENOMEM;
+
+ size = I915_GTT_PAGE_SIZE_4K;
+ gfp &= ~__GFP_NOWARN;
+ } while (1);
+}
+
+void cleanup_scratch_page(struct i915_address_space *vm)
+{
+ struct i915_page_dma *p = px_base(&vm->scratch[0]);
+ unsigned int order = vm->scratch_order;
+
+ dma_unmap_page(vm->dma, p->daddr, BIT(order) << PAGE_SHIFT,
+ PCI_DMA_BIDIRECTIONAL);
+ __free_pages(p->page, order);
+}
+
+void free_scratch(struct i915_address_space *vm)
+{
+ int i;
+
+ if (!px_dma(&vm->scratch[0])) /* set to 0 on clones */
+ return;
+
+ for (i = 1; i <= vm->top; i++) {
+ if (!px_dma(&vm->scratch[i]))
+ break;
+ cleanup_page_dma(vm, px_base(&vm->scratch[i]));
+ }
+
+ cleanup_scratch_page(vm);
+}
+
+void gtt_write_workarounds(struct intel_gt *gt)
+{
+ struct drm_i915_private *i915 = gt->i915;
+ struct intel_uncore *uncore = gt->uncore;
+
+ /*
+ * This function is for gtt related workarounds. This function is
+ * called on driver load and after a GPU reset, so you can place
+ * workarounds here even if they get overwritten by GPU reset.
+ */
+ /* WaIncreaseDefaultTLBEntries:chv,bdw,skl,bxt,kbl,glk,cfl,cnl,icl */
+ if (IS_BROADWELL(i915))
+ intel_uncore_write(uncore,
+ GEN8_L3_LRA_1_GPGPU,
+ GEN8_L3_LRA_1_GPGPU_DEFAULT_VALUE_BDW);
+ else if (IS_CHERRYVIEW(i915))
+ intel_uncore_write(uncore,
+ GEN8_L3_LRA_1_GPGPU,
+ GEN8_L3_LRA_1_GPGPU_DEFAULT_VALUE_CHV);
+ else if (IS_GEN9_LP(i915))
+ intel_uncore_write(uncore,
+ GEN8_L3_LRA_1_GPGPU,
+ GEN9_L3_LRA_1_GPGPU_DEFAULT_VALUE_BXT);
+ else if (INTEL_GEN(i915) >= 9 && INTEL_GEN(i915) <= 11)
+ intel_uncore_write(uncore,
+ GEN8_L3_LRA_1_GPGPU,
+ GEN9_L3_LRA_1_GPGPU_DEFAULT_VALUE_SKL);
+
+ /*
+ * To support 64K PTEs we need to first enable the use of the
+ * Intermediate-Page-Size(IPS) bit of the PDE field via some magical
+ * mmio, otherwise the page-walker will simply ignore the IPS bit. This
+ * shouldn't be needed after GEN10.
+ *
+ * 64K pages were first introduced from BDW+, although technically they
+ * only *work* from gen9+. For pre-BDW we instead have the option for
+ * 32K pages, but we don't currently have any support for it in our
+ * driver.
+ */
+ if (HAS_PAGE_SIZES(i915, I915_GTT_PAGE_SIZE_64K) &&
+ INTEL_GEN(i915) <= 10)
+ intel_uncore_rmw(uncore,
+ GEN8_GAMW_ECO_DEV_RW_IA,
+ 0,
+ GAMW_ECO_ENABLE_64K_IPS_FIELD);
+
+ if (IS_GEN_RANGE(i915, 8, 11)) {
+ bool can_use_gtt_cache = true;
+
+ /*
+ * According to the BSpec if we use 2M/1G pages then we also
+ * need to disable the GTT cache. At least on BDW we can see
+ * visual corruption when using 2M pages, and not disabling the
+ * GTT cache.
+ */
+ if (HAS_PAGE_SIZES(i915, I915_GTT_PAGE_SIZE_2M))
+ can_use_gtt_cache = false;
+
+ /* WaGttCachingOffByDefault */
+ intel_uncore_write(uncore,
+ HSW_GTT_CACHE_EN,
+ can_use_gtt_cache ? GTT_CACHE_EN_ALL : 0);
+ WARN_ON_ONCE(can_use_gtt_cache &&
+ intel_uncore_read(uncore,
+ HSW_GTT_CACHE_EN) == 0);
+ }
+}
+
+u64 gen8_pte_encode(dma_addr_t addr,
+ enum i915_cache_level level,
+ u32 flags)
+{
+ gen8_pte_t pte = addr | _PAGE_PRESENT | _PAGE_RW;
+
+ if (unlikely(flags & PTE_READ_ONLY))
+ pte &= ~_PAGE_RW;
+
+ switch (level) {
+ case I915_CACHE_NONE:
+ pte |= PPAT_UNCACHED;
+ break;
+ case I915_CACHE_WT:
+ pte |= PPAT_DISPLAY_ELLC;
+ break;
+ default:
+ pte |= PPAT_CACHED;
+ break;
+ }
+
+ return pte;
+}
+
+static void tgl_setup_private_ppat(struct intel_uncore *uncore)
+{
+ /* TGL doesn't support LLC or AGE settings */
+ intel_uncore_write(uncore, GEN12_PAT_INDEX(0), GEN8_PPAT_WB);
+ intel_uncore_write(uncore, GEN12_PAT_INDEX(1), GEN8_PPAT_WC);
+ intel_uncore_write(uncore, GEN12_PAT_INDEX(2), GEN8_PPAT_WT);
+ intel_uncore_write(uncore, GEN12_PAT_INDEX(3), GEN8_PPAT_UC);
+ intel_uncore_write(uncore, GEN12_PAT_INDEX(4), GEN8_PPAT_WB);
+ intel_uncore_write(uncore, GEN12_PAT_INDEX(5), GEN8_PPAT_WB);
+ intel_uncore_write(uncore, GEN12_PAT_INDEX(6), GEN8_PPAT_WB);
+ intel_uncore_write(uncore, GEN12_PAT_INDEX(7), GEN8_PPAT_WB);
+}
+
+static void cnl_setup_private_ppat(struct intel_uncore *uncore)
+{
+ intel_uncore_write(uncore,
+ GEN10_PAT_INDEX(0),
+ GEN8_PPAT_WB | GEN8_PPAT_LLC);
+ intel_uncore_write(uncore,
+ GEN10_PAT_INDEX(1),
+ GEN8_PPAT_WC | GEN8_PPAT_LLCELLC);
+ intel_uncore_write(uncore,
+ GEN10_PAT_INDEX(2),
+ GEN8_PPAT_WT | GEN8_PPAT_LLCELLC);
+ intel_uncore_write(uncore,
+ GEN10_PAT_INDEX(3),
+ GEN8_PPAT_UC);
+ intel_uncore_write(uncore,
+ GEN10_PAT_INDEX(4),
+ GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(0));
+ intel_uncore_write(uncore,
+ GEN10_PAT_INDEX(5),
+ GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(1));
+ intel_uncore_write(uncore,
+ GEN10_PAT_INDEX(6),
+ GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(2));
+ intel_uncore_write(uncore,
+ GEN10_PAT_INDEX(7),
+ GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(3));
+}
+
+/*
+ * The GGTT and PPGTT need a private PPAT setup in order to handle cacheability
+ * bits. When using advanced contexts each context stores its own PAT, but
+ * writing this data shouldn't be harmful even in those cases.
+ */
+static void bdw_setup_private_ppat(struct intel_uncore *uncore)
+{
+ u64 pat;
+
+ pat = GEN8_PPAT(0, GEN8_PPAT_WB | GEN8_PPAT_LLC) | /* for normal objects, no eLLC */
+ GEN8_PPAT(1, GEN8_PPAT_WC | GEN8_PPAT_LLCELLC) | /* for something pointing to ptes? */
+ GEN8_PPAT(2, GEN8_PPAT_WT | GEN8_PPAT_LLCELLC) | /* for scanout with eLLC */
+ GEN8_PPAT(3, GEN8_PPAT_UC) | /* Uncached objects, mostly for scanout */
+ GEN8_PPAT(4, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(0)) |
+ GEN8_PPAT(5, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(1)) |
+ GEN8_PPAT(6, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(2)) |
+ GEN8_PPAT(7, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(3));
+
+ intel_uncore_write(uncore, GEN8_PRIVATE_PAT_LO, lower_32_bits(pat));
+ intel_uncore_write(uncore, GEN8_PRIVATE_PAT_HI, upper_32_bits(pat));
+}
+
+static void chv_setup_private_ppat(struct intel_uncore *uncore)
+{
+ u64 pat;
+
+ /*
+ * Map WB on BDW to snooped on CHV.
+ *
+ * Only the snoop bit has meaning for CHV, the rest is
+ * ignored.
+ *
+ * The hardware will never snoop for certain types of accesses:
+ * - CPU GTT (GMADR->GGTT->no snoop->memory)
+ * - PPGTT page tables
+ * - some other special cycles
+ *
+ * As with BDW, we also need to consider the following for GT accesses:
+ * "For GGTT, there is NO pat_sel[2:0] from the entry,
+ * so RTL will always use the value corresponding to
+ * pat_sel = 000".
+ * Which means we must set the snoop bit in PAT entry 0
+ * in order to keep the global status page working.
+ */
+
+ pat = GEN8_PPAT(0, CHV_PPAT_SNOOP) |
+ GEN8_PPAT(1, 0) |
+ GEN8_PPAT(2, 0) |
+ GEN8_PPAT(3, 0) |
+ GEN8_PPAT(4, CHV_PPAT_SNOOP) |
+ GEN8_PPAT(5, CHV_PPAT_SNOOP) |
+ GEN8_PPAT(6, CHV_PPAT_SNOOP) |
+ GEN8_PPAT(7, CHV_PPAT_SNOOP);
+
+ intel_uncore_write(uncore, GEN8_PRIVATE_PAT_LO, lower_32_bits(pat));
+ intel_uncore_write(uncore, GEN8_PRIVATE_PAT_HI, upper_32_bits(pat));
+}
+
+void setup_private_pat(struct intel_uncore *uncore)
+{
+ struct drm_i915_private *i915 = uncore->i915;
+
+ GEM_BUG_ON(INTEL_GEN(i915) < 8);
+
+ if (INTEL_GEN(i915) >= 12)
+ tgl_setup_private_ppat(uncore);
+ else if (INTEL_GEN(i915) >= 10)
+ cnl_setup_private_ppat(uncore);
+ else if (IS_CHERRYVIEW(i915) || IS_GEN9_LP(i915))
+ chv_setup_private_ppat(uncore);
+ else
+ bdw_setup_private_ppat(uncore);
+}
+
+#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
+#include "selftests/mock_gtt.c"
+#endif
--- /dev/null
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2020 Intel Corporation
+ *
+ * Please try to maintain the following order within this file unless it makes
+ * sense to do otherwise. From top to bottom:
+ * 1. typedefs
+ * 2. #defines, and macros
+ * 3. structure definitions
+ * 4. function prototypes
+ *
+ * Within each section, please try to order by generation in ascending order,
+ * from top to bottom (ie. gen6 on the top, gen8 on the bottom).
+ */
+
+#ifndef __INTEL_GTT_H__
+#define __INTEL_GTT_H__
+
+#include <linux/io-mapping.h>
+#include <linux/kref.h>
+#include <linux/mm.h>
+#include <linux/pagevec.h>
+#include <linux/scatterlist.h>
+#include <linux/workqueue.h>
+
+#include <drm/drm_mm.h>
+
+#include "gt/intel_reset.h"
+#include "i915_gem_fence_reg.h"
+#include "i915_selftest.h"
+#include "i915_vma_types.h"
+
+#define I915_GFP_ALLOW_FAIL (GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_NOWARN)
+
+#if IS_ENABLED(CONFIG_DRM_I915_TRACE_GTT)
+#define DBG(...) trace_printk(__VA_ARGS__)
+#else
+#define DBG(...)
+#endif
+
+#define NALLOC 3 /* 1 normal, 1 for concurrent threads, 1 for preallocation */
+
+#define I915_GTT_PAGE_SIZE_4K BIT_ULL(12)
+#define I915_GTT_PAGE_SIZE_64K BIT_ULL(16)
+#define I915_GTT_PAGE_SIZE_2M BIT_ULL(21)
+
+#define I915_GTT_PAGE_SIZE I915_GTT_PAGE_SIZE_4K
+#define I915_GTT_MAX_PAGE_SIZE I915_GTT_PAGE_SIZE_2M
+
+#define I915_GTT_PAGE_MASK -I915_GTT_PAGE_SIZE
+
+#define I915_GTT_MIN_ALIGNMENT I915_GTT_PAGE_SIZE
+
+#define I915_FENCE_REG_NONE -1
+#define I915_MAX_NUM_FENCES 32
+/* 32 fences + sign bit for FENCE_REG_NONE */
+#define I915_MAX_NUM_FENCE_BITS 6
+
+typedef u32 gen6_pte_t;
+typedef u64 gen8_pte_t;
+
+#define ggtt_total_entries(ggtt) ((ggtt)->vm.total >> PAGE_SHIFT)
+
+#define I915_PTES(pte_len) ((unsigned int)(PAGE_SIZE / (pte_len)))
+#define I915_PTE_MASK(pte_len) (I915_PTES(pte_len) - 1)
+#define I915_PDES 512
+#define I915_PDE_MASK (I915_PDES - 1)
+
+/* gen6-hsw has bit 11-4 for physical addr bit 39-32 */
+#define GEN6_GTT_ADDR_ENCODE(addr) ((addr) | (((addr) >> 28) & 0xff0))
+#define GEN6_PTE_ADDR_ENCODE(addr) GEN6_GTT_ADDR_ENCODE(addr)
+#define GEN6_PDE_ADDR_ENCODE(addr) GEN6_GTT_ADDR_ENCODE(addr)
+#define GEN6_PTE_CACHE_LLC (2 << 1)
+#define GEN6_PTE_UNCACHED (1 << 1)
+#define GEN6_PTE_VALID REG_BIT(0)
+
+#define GEN6_PTES I915_PTES(sizeof(gen6_pte_t))
+#define GEN6_PD_SIZE (I915_PDES * PAGE_SIZE)
+#define GEN6_PD_ALIGN (PAGE_SIZE * 16)
+#define GEN6_PDE_SHIFT 22
+#define GEN6_PDE_VALID REG_BIT(0)
+#define NUM_PTE(pde_shift) (1 << (pde_shift - PAGE_SHIFT))
+
+#define GEN7_PTE_CACHE_L3_LLC (3 << 1)
+
+#define BYT_PTE_SNOOPED_BY_CPU_CACHES REG_BIT(2)
+#define BYT_PTE_WRITEABLE REG_BIT(1)
+
+/*
+ * Cacheability Control is a 4-bit value. The low three bits are stored in bits
+ * 3:1 of the PTE, while the fourth bit is stored in bit 11 of the PTE.
+ */
+#define HSW_CACHEABILITY_CONTROL(bits) ((((bits) & 0x7) << 1) | \
+ (((bits) & 0x8) << (11 - 3)))
+#define HSW_WB_LLC_AGE3 HSW_CACHEABILITY_CONTROL(0x2)
+#define HSW_WB_LLC_AGE0 HSW_CACHEABILITY_CONTROL(0x3)
+#define HSW_WB_ELLC_LLC_AGE3 HSW_CACHEABILITY_CONTROL(0x8)
+#define HSW_WB_ELLC_LLC_AGE0 HSW_CACHEABILITY_CONTROL(0xb)
+#define HSW_WT_ELLC_LLC_AGE3 HSW_CACHEABILITY_CONTROL(0x7)
+#define HSW_WT_ELLC_LLC_AGE0 HSW_CACHEABILITY_CONTROL(0x6)
+#define HSW_PTE_UNCACHED (0)
+#define HSW_GTT_ADDR_ENCODE(addr) ((addr) | (((addr) >> 28) & 0x7f0))
+#define HSW_PTE_ADDR_ENCODE(addr) HSW_GTT_ADDR_ENCODE(addr)
+
+/*
+ * GEN8 32b style address is defined as a 3 level page table:
+ * 31:30 | 29:21 | 20:12 | 11:0
+ * PDPE | PDE | PTE | offset
+ * The difference as compared to normal x86 3 level page table is the PDPEs are
+ * programmed via register.
+ *
+ * GEN8 48b style address is defined as a 4 level page table:
+ * 47:39 | 38:30 | 29:21 | 20:12 | 11:0
+ * PML4E | PDPE | PDE | PTE | offset
+ */
+#define GEN8_3LVL_PDPES 4
+
+#define PPAT_UNCACHED (_PAGE_PWT | _PAGE_PCD)
+#define PPAT_CACHED_PDE 0 /* WB LLC */
+#define PPAT_CACHED _PAGE_PAT /* WB LLCeLLC */
+#define PPAT_DISPLAY_ELLC _PAGE_PCD /* WT eLLC */
+
+#define CHV_PPAT_SNOOP REG_BIT(6)
+#define GEN8_PPAT_AGE(x) ((x)<<4)
+#define GEN8_PPAT_LLCeLLC (3<<2)
+#define GEN8_PPAT_LLCELLC (2<<2)
+#define GEN8_PPAT_LLC (1<<2)
+#define GEN8_PPAT_WB (3<<0)
+#define GEN8_PPAT_WT (2<<0)
+#define GEN8_PPAT_WC (1<<0)
+#define GEN8_PPAT_UC (0<<0)
+#define GEN8_PPAT_ELLC_OVERRIDE (0<<2)
+#define GEN8_PPAT(i, x) ((u64)(x) << ((i) * 8))
+
+#define GEN8_PDE_IPS_64K BIT(11)
+#define GEN8_PDE_PS_2M BIT(7)
+
+#define for_each_sgt_daddr(__dp, __iter, __sgt) \
+ __for_each_sgt_daddr(__dp, __iter, __sgt, I915_GTT_PAGE_SIZE)
+
+struct i915_page_dma {
+ struct page *page;
+ union {
+ dma_addr_t daddr;
+
+ /*
+ * For gen6/gen7 only. This is the offset in the GGTT
+ * where the page directory entries for PPGTT begin
+ */
+ u32 ggtt_offset;
+ };
+};
+
+struct i915_page_scratch {
+ struct i915_page_dma base;
+ u64 encode;
+};
+
+struct i915_page_table {
+ struct i915_page_dma base;
+ atomic_t used;
+};
+
+struct i915_page_directory {
+ struct i915_page_table pt;
+ spinlock_t lock;
+ void *entry[512];
+};
+
+#define __px_choose_expr(x, type, expr, other) \
+ __builtin_choose_expr( \
+ __builtin_types_compatible_p(typeof(x), type) || \
+ __builtin_types_compatible_p(typeof(x), const type), \
+ ({ type __x = (type)(x); expr; }), \
+ other)
+
+#define px_base(px) \
+ __px_choose_expr(px, struct i915_page_dma *, __x, \
+ __px_choose_expr(px, struct i915_page_scratch *, &__x->base, \
+ __px_choose_expr(px, struct i915_page_table *, &__x->base, \
+ __px_choose_expr(px, struct i915_page_directory *, &__x->pt.base, \
+ (void)0))))
+#define px_dma(px) (px_base(px)->daddr)
+
+#define px_pt(px) \
+ __px_choose_expr(px, struct i915_page_table *, __x, \
+ __px_choose_expr(px, struct i915_page_directory *, &__x->pt, \
+ (void)0))
+#define px_used(px) (&px_pt(px)->used)
+
+enum i915_cache_level;
+
+struct drm_i915_file_private;
+struct drm_i915_gem_object;
+struct i915_vma;
+struct intel_gt;
+
+struct i915_vma_ops {
+ /* Map an object into an address space with the given cache flags. */
+ int (*bind_vma)(struct i915_vma *vma,
+ enum i915_cache_level cache_level,
+ u32 flags);
+ /*
+ * Unmap an object from an address space. This usually consists of
+ * setting the valid PTE entries to a reserved scratch page.
+ */
+ void (*unbind_vma)(struct i915_vma *vma);
+
+ int (*set_pages)(struct i915_vma *vma);
+ void (*clear_pages)(struct i915_vma *vma);
+};
+
+struct pagestash {
+ spinlock_t lock;
+ struct pagevec pvec;
+};
+
+void stash_init(struct pagestash *stash);
+
+struct i915_address_space {
+ struct kref ref;
+ struct rcu_work rcu;
+
+ struct drm_mm mm;
+ struct intel_gt *gt;
+ struct drm_i915_private *i915;
+ struct device *dma;
+ /*
+ * Every address space belongs to a struct file - except for the global
+ * GTT that is owned by the driver (and so @file is set to NULL). In
+ * principle, no information should leak from one context to another
+ * (or between files/processes etc) unless explicitly shared by the
+ * owner. Tracking the owner is important in order to free up per-file
+ * objects along with the file, to aide resource tracking, and to
+ * assign blame.
+ */
+ struct drm_i915_file_private *file;
+ u64 total; /* size addr space maps (ex. 2GB for ggtt) */
+ u64 reserved; /* size addr space reserved */
+
+ unsigned int bind_async_flags;
+
+ /*
+ * Each active user context has its own address space (in full-ppgtt).
+ * Since the vm may be shared between multiple contexts, we count how
+ * many contexts keep us "open". Once open hits zero, we are closed
+ * and do not allow any new attachments, and proceed to shutdown our
+ * vma and page directories.
+ */
+ atomic_t open;
+
+ struct mutex mutex; /* protects vma and our lists */
+#define VM_CLASS_GGTT 0
+#define VM_CLASS_PPGTT 1
+
+ struct i915_page_scratch scratch[4];
+ unsigned int scratch_order;
+ unsigned int top;
+
+ /**
+ * List of vma currently bound.
+ */
+ struct list_head bound_list;
+
+ struct pagestash free_pages;
+
+ /* Global GTT */
+ bool is_ggtt:1;
+
+ /* Some systems require uncached updates of the page directories */
+ bool pt_kmap_wc:1;
+
+ /* Some systems support read-only mappings for GGTT and/or PPGTT */
+ bool has_read_only:1;
+
+ u64 (*pte_encode)(dma_addr_t addr,
+ enum i915_cache_level level,
+ u32 flags); /* Create a valid PTE */
+#define PTE_READ_ONLY BIT(0)
+
+ int (*allocate_va_range)(struct i915_address_space *vm,
+ u64 start, u64 length);
+ void (*clear_range)(struct i915_address_space *vm,
+ u64 start, u64 length);
+ void (*insert_page)(struct i915_address_space *vm,
+ dma_addr_t addr,
+ u64 offset,
+ enum i915_cache_level cache_level,
+ u32 flags);
+ void (*insert_entries)(struct i915_address_space *vm,
+ struct i915_vma *vma,
+ enum i915_cache_level cache_level,
+ u32 flags);
+ void (*cleanup)(struct i915_address_space *vm);
+
+ struct i915_vma_ops vma_ops;
+
+ I915_SELFTEST_DECLARE(struct fault_attr fault_attr);
+ I915_SELFTEST_DECLARE(bool scrub_64K);
+};
+
+/*
+ * The Graphics Translation Table is the way in which GEN hardware translates a
+ * Graphics Virtual Address into a Physical Address. In addition to the normal
+ * collateral associated with any va->pa translations GEN hardware also has a
+ * portion of the GTT which can be mapped by the CPU and remain both coherent
+ * and correct (in cases like swizzling). That region is referred to as GMADR in
+ * the spec.
+ */
+struct i915_ggtt {
+ struct i915_address_space vm;
+
+ struct io_mapping iomap; /* Mapping to our CPU mappable region */
+ struct resource gmadr; /* GMADR resource */
+ resource_size_t mappable_end; /* End offset that we can CPU map */
+
+ /** "Graphics Stolen Memory" holds the global PTEs */
+ void __iomem *gsm;
+ void (*invalidate)(struct i915_ggtt *ggtt);
+
+ /** PPGTT used for aliasing the PPGTT with the GTT */
+ struct i915_ppgtt *alias;
+
+ bool do_idle_maps;
+
+ int mtrr;
+
+ /** Bit 6 swizzling required for X tiling */
+ u32 bit_6_swizzle_x;
+ /** Bit 6 swizzling required for Y tiling */
+ u32 bit_6_swizzle_y;
+
+ u32 pin_bias;
+
+ unsigned int num_fences;
+ struct i915_fence_reg fence_regs[I915_MAX_NUM_FENCES];
+ struct list_head fence_list;
+
+ /**
+ * List of all objects in gtt_space, currently mmaped by userspace.
+ * All objects within this list must also be on bound_list.
+ */
+ struct list_head userfault_list;
+
+ /* Manual runtime pm autosuspend delay for user GGTT mmaps */
+ struct intel_wakeref_auto userfault_wakeref;
+
+ struct drm_mm_node error_capture;
+ struct drm_mm_node uc_fw;
+};
+
+struct i915_ppgtt {
+ struct i915_address_space vm;
+
+ struct i915_page_directory *pd;
+};
+
+#define i915_is_ggtt(vm) ((vm)->is_ggtt)
+
+static inline bool
+i915_vm_is_4lvl(const struct i915_address_space *vm)
+{
+ return (vm->total - 1) >> 32;
+}
+
+static inline bool
+i915_vm_has_scratch_64K(struct i915_address_space *vm)
+{
+ return vm->scratch_order == get_order(I915_GTT_PAGE_SIZE_64K);
+}
+
+static inline bool
+i915_vm_has_cache_coloring(struct i915_address_space *vm)
+{
+ return i915_is_ggtt(vm) && vm->mm.color_adjust;
+}
+
+static inline struct i915_ggtt *
+i915_vm_to_ggtt(struct i915_address_space *vm)
+{
+ BUILD_BUG_ON(offsetof(struct i915_ggtt, vm));
+ GEM_BUG_ON(!i915_is_ggtt(vm));
+ return container_of(vm, struct i915_ggtt, vm);
+}
+
+static inline struct i915_ppgtt *
+i915_vm_to_ppgtt(struct i915_address_space *vm)
+{
+ BUILD_BUG_ON(offsetof(struct i915_ppgtt, vm));
+ GEM_BUG_ON(i915_is_ggtt(vm));
+ return container_of(vm, struct i915_ppgtt, vm);
+}
+
+static inline struct i915_address_space *
+i915_vm_get(struct i915_address_space *vm)
+{
+ kref_get(&vm->ref);
+ return vm;
+}
+
+void i915_vm_release(struct kref *kref);
+
+static inline void i915_vm_put(struct i915_address_space *vm)
+{
+ kref_put(&vm->ref, i915_vm_release);
+}
+
+static inline struct i915_address_space *
+i915_vm_open(struct i915_address_space *vm)
+{
+ GEM_BUG_ON(!atomic_read(&vm->open));
+ atomic_inc(&vm->open);
+ return i915_vm_get(vm);
+}
+
+static inline bool
+i915_vm_tryopen(struct i915_address_space *vm)
+{
+ if (atomic_add_unless(&vm->open, 1, 0))
+ return i915_vm_get(vm);
+
+ return false;
+}
+
+void __i915_vm_close(struct i915_address_space *vm);
+
+static inline void
+i915_vm_close(struct i915_address_space *vm)
+{
+ GEM_BUG_ON(!atomic_read(&vm->open));
+ if (atomic_dec_and_test(&vm->open))
+ __i915_vm_close(vm);
+
+ i915_vm_put(vm);
+}
+
+void i915_address_space_init(struct i915_address_space *vm, int subclass);
+void i915_address_space_fini(struct i915_address_space *vm);
+
+static inline u32 i915_pte_index(u64 address, unsigned int pde_shift)
+{
+ const u32 mask = NUM_PTE(pde_shift) - 1;
+
+ return (address >> PAGE_SHIFT) & mask;
+}
+
+/*
+ * Helper to counts the number of PTEs within the given length. This count
+ * does not cross a page table boundary, so the max value would be
+ * GEN6_PTES for GEN6, and GEN8_PTES for GEN8.
+ */
+static inline u32 i915_pte_count(u64 addr, u64 length, unsigned int pde_shift)
+{
+ const u64 mask = ~((1ULL << pde_shift) - 1);
+ u64 end;
+
+ GEM_BUG_ON(length == 0);
+ GEM_BUG_ON(offset_in_page(addr | length));
+
+ end = addr + length;
+
+ if ((addr & mask) != (end & mask))
+ return NUM_PTE(pde_shift) - i915_pte_index(addr, pde_shift);
+
+ return i915_pte_index(end, pde_shift) - i915_pte_index(addr, pde_shift);
+}
+
+static inline u32 i915_pde_index(u64 addr, u32 shift)
+{
+ return (addr >> shift) & I915_PDE_MASK;
+}
+
+static inline struct i915_page_table *
+i915_pt_entry(const struct i915_page_directory * const pd,
+ const unsigned short n)
+{
+ return pd->entry[n];
+}
+
+static inline struct i915_page_directory *
+i915_pd_entry(const struct i915_page_directory * const pdp,
+ const unsigned short n)
+{
+ return pdp->entry[n];
+}
+
+static inline dma_addr_t
+i915_page_dir_dma_addr(const struct i915_ppgtt *ppgtt, const unsigned int n)
+{
+ struct i915_page_dma *pt = ppgtt->pd->entry[n];
+
+ return px_dma(pt ?: px_base(&ppgtt->vm.scratch[ppgtt->vm.top]));
+}
+
+void ppgtt_init(struct i915_ppgtt *ppgtt, struct intel_gt *gt);
+
+int i915_ggtt_probe_hw(struct drm_i915_private *i915);
+int i915_ggtt_init_hw(struct drm_i915_private *i915);
+int i915_ggtt_enable_hw(struct drm_i915_private *i915);
+void i915_ggtt_enable_guc(struct i915_ggtt *ggtt);
+void i915_ggtt_disable_guc(struct i915_ggtt *ggtt);
+int i915_init_ggtt(struct drm_i915_private *i915);
+void i915_ggtt_driver_release(struct drm_i915_private *i915);
+
+static inline bool i915_ggtt_has_aperture(const struct i915_ggtt *ggtt)
+{
+ return ggtt->mappable_end > 0;
+}
+
+int i915_ppgtt_init_hw(struct intel_gt *gt);
+
+struct i915_ppgtt *i915_ppgtt_create(struct intel_gt *gt);
+
+void i915_gem_suspend_gtt_mappings(struct drm_i915_private *i915);
+void i915_gem_restore_gtt_mappings(struct drm_i915_private *i915);
+
+u64 gen8_pte_encode(dma_addr_t addr,
+ enum i915_cache_level level,
+ u32 flags);
+
+int setup_page_dma(struct i915_address_space *vm, struct i915_page_dma *p);
+void cleanup_page_dma(struct i915_address_space *vm, struct i915_page_dma *p);
+
+#define kmap_atomic_px(px) kmap_atomic(px_base(px)->page)
+
+void
+fill_page_dma(const struct i915_page_dma *p, const u64 val, unsigned int count);
+
+#define fill_px(px, v) fill_page_dma(px_base(px), (v), PAGE_SIZE / sizeof(u64))
+#define fill32_px(px, v) do { \
+ u64 v__ = lower_32_bits(v); \
+ fill_px((px), v__ << 32 | v__); \
+} while (0)
+
+int setup_scratch_page(struct i915_address_space *vm, gfp_t gfp);
+void cleanup_scratch_page(struct i915_address_space *vm);
+void free_scratch(struct i915_address_space *vm);
+
+struct i915_page_table *alloc_pt(struct i915_address_space *vm);
+struct i915_page_directory *alloc_pd(struct i915_address_space *vm);
+struct i915_page_directory *__alloc_pd(size_t sz);
+
+void free_pd(struct i915_address_space *vm, struct i915_page_dma *pd);
+
+#define free_px(vm, px) free_pd(vm, px_base(px))
+
+void
+__set_pd_entry(struct i915_page_directory * const pd,
+ const unsigned short idx,
+ struct i915_page_dma * const to,
+ u64 (*encode)(const dma_addr_t, const enum i915_cache_level));
+
+#define set_pd_entry(pd, idx, to) \
+ __set_pd_entry((pd), (idx), px_base(to), gen8_pde_encode)
+
+void
+clear_pd_entry(struct i915_page_directory * const pd,
+ const unsigned short idx,
+ const struct i915_page_scratch * const scratch);
+
+bool
+release_pd_entry(struct i915_page_directory * const pd,
+ const unsigned short idx,
+ struct i915_page_table * const pt,
+ const struct i915_page_scratch * const scratch);
+void gen6_ggtt_invalidate(struct i915_ggtt *ggtt);
+
+int ggtt_set_pages(struct i915_vma *vma);
+int ppgtt_set_pages(struct i915_vma *vma);
+void clear_pages(struct i915_vma *vma);
+
+void gtt_write_workarounds(struct intel_gt *gt);
+
+void setup_private_pat(struct intel_uncore *uncore);
+
+static inline struct sgt_dma {
+ struct scatterlist *sg;
+ dma_addr_t dma, max;
+} sgt_dma(struct i915_vma *vma) {
+ struct scatterlist *sg = vma->pages->sgl;
+ dma_addr_t addr = sg_dma_address(sg);
+
+ return (struct sgt_dma){ sg, addr, addr + sg->length };
+}
+
+#endif
--- /dev/null
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+
+#include <linux/slab.h>
+
+#include "i915_trace.h"
+#include "intel_gtt.h"
+#include "gen6_ppgtt.h"
+#include "gen8_ppgtt.h"
+
+struct i915_page_table *alloc_pt(struct i915_address_space *vm)
+{
+ struct i915_page_table *pt;
+
+ pt = kmalloc(sizeof(*pt), I915_GFP_ALLOW_FAIL);
+ if (unlikely(!pt))
+ return ERR_PTR(-ENOMEM);
+
+ if (unlikely(setup_page_dma(vm, &pt->base))) {
+ kfree(pt);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ atomic_set(&pt->used, 0);
+ return pt;
+}
+
+struct i915_page_directory *__alloc_pd(size_t sz)
+{
+ struct i915_page_directory *pd;
+
+ pd = kzalloc(sz, I915_GFP_ALLOW_FAIL);
+ if (unlikely(!pd))
+ return NULL;
+
+ spin_lock_init(&pd->lock);
+ return pd;
+}
+
+struct i915_page_directory *alloc_pd(struct i915_address_space *vm)
+{
+ struct i915_page_directory *pd;
+
+ pd = __alloc_pd(sizeof(*pd));
+ if (unlikely(!pd))
+ return ERR_PTR(-ENOMEM);
+
+ if (unlikely(setup_page_dma(vm, px_base(pd)))) {
+ kfree(pd);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ return pd;
+}
+
+void free_pd(struct i915_address_space *vm, struct i915_page_dma *pd)
+{
+ cleanup_page_dma(vm, pd);
+ kfree(pd);
+}
+
+static inline void
+write_dma_entry(struct i915_page_dma * const pdma,
+ const unsigned short idx,
+ const u64 encoded_entry)
+{
+ u64 * const vaddr = kmap_atomic(pdma->page);
+
+ vaddr[idx] = encoded_entry;
+ kunmap_atomic(vaddr);
+}
+
+void
+__set_pd_entry(struct i915_page_directory * const pd,
+ const unsigned short idx,
+ struct i915_page_dma * const to,
+ u64 (*encode)(const dma_addr_t, const enum i915_cache_level))
+{
+ /* Each thread pre-pins the pd, and we may have a thread per pde. */
+ GEM_BUG_ON(atomic_read(px_used(pd)) > NALLOC * ARRAY_SIZE(pd->entry));
+
+ atomic_inc(px_used(pd));
+ pd->entry[idx] = to;
+ write_dma_entry(px_base(pd), idx, encode(to->daddr, I915_CACHE_LLC));
+}
+
+void
+clear_pd_entry(struct i915_page_directory * const pd,
+ const unsigned short idx,
+ const struct i915_page_scratch * const scratch)
+{
+ GEM_BUG_ON(atomic_read(px_used(pd)) == 0);
+
+ write_dma_entry(px_base(pd), idx, scratch->encode);
+ pd->entry[idx] = NULL;
+ atomic_dec(px_used(pd));
+}
+
+bool
+release_pd_entry(struct i915_page_directory * const pd,
+ const unsigned short idx,
+ struct i915_page_table * const pt,
+ const struct i915_page_scratch * const scratch)
+{
+ bool free = false;
+
+ if (atomic_add_unless(&pt->used, -1, 1))
+ return false;
+
+ spin_lock(&pd->lock);
+ if (atomic_dec_and_test(&pt->used)) {
+ clear_pd_entry(pd, idx, scratch);
+ free = true;
+ }
+ spin_unlock(&pd->lock);
+
+ return free;
+}
+
+int i915_ppgtt_init_hw(struct intel_gt *gt)
+{
+ struct drm_i915_private *i915 = gt->i915;
+
+ gtt_write_workarounds(gt);
+
+ if (IS_GEN(i915, 6))
+ gen6_ppgtt_enable(gt);
+ else if (IS_GEN(i915, 7))
+ gen7_ppgtt_enable(gt);
+
+ return 0;
+}
+
+static struct i915_ppgtt *
+__ppgtt_create(struct intel_gt *gt)
+{
+ if (INTEL_GEN(gt->i915) < 8)
+ return gen6_ppgtt_create(gt);
+ else
+ return gen8_ppgtt_create(gt);
+}
+
+struct i915_ppgtt *i915_ppgtt_create(struct intel_gt *gt)
+{
+ struct i915_ppgtt *ppgtt;
+
+ ppgtt = __ppgtt_create(gt);
+ if (IS_ERR(ppgtt))
+ return ppgtt;
+
+ trace_i915_ppgtt_create(&ppgtt->vm);
+
+ return ppgtt;
+}
+
+static int ppgtt_bind_vma(struct i915_vma *vma,
+ enum i915_cache_level cache_level,
+ u32 flags)
+{
+ u32 pte_flags;
+ int err;
+
+ if (flags & I915_VMA_ALLOC) {
+ err = vma->vm->allocate_va_range(vma->vm,
+ vma->node.start, vma->size);
+ if (err)
+ return err;
+
+ set_bit(I915_VMA_ALLOC_BIT, __i915_vma_flags(vma));
+ }
+
+ /* Applicable to VLV, and gen8+ */
+ pte_flags = 0;
+ if (i915_gem_object_is_readonly(vma->obj))
+ pte_flags |= PTE_READ_ONLY;
+
+ GEM_BUG_ON(!test_bit(I915_VMA_ALLOC_BIT, __i915_vma_flags(vma)));
+ vma->vm->insert_entries(vma->vm, vma, cache_level, pte_flags);
+ wmb();
+
+ return 0;
+}
+
+static void ppgtt_unbind_vma(struct i915_vma *vma)
+{
+ if (test_and_clear_bit(I915_VMA_ALLOC_BIT, __i915_vma_flags(vma)))
+ vma->vm->clear_range(vma->vm, vma->node.start, vma->size);
+}
+
+int ppgtt_set_pages(struct i915_vma *vma)
+{
+ GEM_BUG_ON(vma->pages);
+
+ vma->pages = vma->obj->mm.pages;
+
+ vma->page_sizes = vma->obj->mm.page_sizes;
+
+ return 0;
+}
+
+void ppgtt_init(struct i915_ppgtt *ppgtt, struct intel_gt *gt)
+{
+ struct drm_i915_private *i915 = gt->i915;
+
+ ppgtt->vm.gt = gt;
+ ppgtt->vm.i915 = i915;
+ ppgtt->vm.dma = &i915->drm.pdev->dev;
+ ppgtt->vm.total = BIT_ULL(INTEL_INFO(i915)->ppgtt_size);
+
+ i915_address_space_init(&ppgtt->vm, VM_CLASS_PPGTT);
+
+ ppgtt->vm.vma_ops.bind_vma = ppgtt_bind_vma;
+ ppgtt->vm.vma_ops.unbind_vma = ppgtt_unbind_vma;
+ ppgtt->vm.vma_ops.set_pages = ppgtt_set_pages;
+ ppgtt->vm.vma_ops.clear_pages = clear_pages;
+}
#include "gem/i915_gem_context.h"
+#include "gen6_ppgtt.h"
#include "i915_drv.h"
#include "i915_trace.h"
#include "intel_context.h"
if (INTEL_PPGTT(gt->i915) < INTEL_PPGTT_FULL)
return 0;
- ppgtt = i915_ppgtt_create(gt->i915);
+ ppgtt = i915_ppgtt_create(gt);
if (IS_ERR(ppgtt))
return PTR_ERR(ppgtt);
enum intel_engine_id i;
int ret;
- ppgtt = i915_ppgtt_create(i915);
+ ppgtt = i915_ppgtt_create(&i915->gt);
if (IS_ERR(ppgtt))
return PTR_ERR(ppgtt);
+// SPDX-License-Identifier: MIT
/*
* Copyright © 2010 Daniel Vetter
- * Copyright © 2011-2014 Intel Corporation
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- *
+ * Copyright © 2020 Intel Corporation
*/
#include <linux/slab.h> /* fault-inject.h is not standalone! */
#include "i915_trace.h"
#include "i915_vgpu.h"
-#define I915_GFP_ALLOW_FAIL (GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_NOWARN)
-
-#if IS_ENABLED(CONFIG_DRM_I915_TRACE_GTT)
-#define DBG(...) trace_printk(__VA_ARGS__)
-#else
-#define DBG(...)
-#endif
-
-#define NALLOC 3 /* 1 normal, 1 for concurrent threads, 1 for preallocation */
-
-/**
- * DOC: Global GTT views
- *
- * Background and previous state
- *
- * Historically objects could exists (be bound) in global GTT space only as
- * singular instances with a view representing all of the object's backing pages
- * in a linear fashion. This view will be called a normal view.
- *
- * To support multiple views of the same object, where the number of mapped
- * pages is not equal to the backing store, or where the layout of the pages
- * is not linear, concept of a GGTT view was added.
- *
- * One example of an alternative view is a stereo display driven by a single
- * image. In this case we would have a framebuffer looking like this
- * (2x2 pages):
- *
- * 12
- * 34
- *
- * Above would represent a normal GGTT view as normally mapped for GPU or CPU
- * rendering. In contrast, fed to the display engine would be an alternative
- * view which could look something like this:
- *
- * 1212
- * 3434
- *
- * In this example both the size and layout of pages in the alternative view is
- * different from the normal view.
- *
- * Implementation and usage
- *
- * GGTT views are implemented using VMAs and are distinguished via enum
- * i915_ggtt_view_type and struct i915_ggtt_view.
- *
- * A new flavour of core GEM functions which work with GGTT bound objects were
- * added with the _ggtt_ infix, and sometimes with _view postfix to avoid
- * renaming in large amounts of code. They take the struct i915_ggtt_view
- * parameter encapsulating all metadata required to implement a view.
- *
- * As a helper for callers which are only interested in the normal view,
- * globally const i915_ggtt_view_normal singleton instance exists. All old core
- * GEM API functions, the ones not taking the view parameter, are operating on,
- * or with the normal GGTT view.
- *
- * Code wanting to add or use a new GGTT view needs to:
- *
- * 1. Add a new enum with a suitable name.
- * 2. Extend the metadata in the i915_ggtt_view structure if required.
- * 3. Add support to i915_get_vma_pages().
- *
- * New views are required to build a scatter-gather table from within the
- * i915_get_vma_pages function. This table is stored in the vma.ggtt_view and
- * exists for the lifetime of an VMA.
- *
- * Core API is designed to have copy semantics which means that passed in
- * struct i915_ggtt_view does not need to be persistent (left around after
- * calling the core API functions).
- *
- */
-
-#define as_pd(x) container_of((x), typeof(struct i915_page_directory), pt)
-
-static int
-i915_get_ggtt_vma_pages(struct i915_vma *vma);
-
-static void gen6_ggtt_invalidate(struct i915_ggtt *ggtt)
-{
- struct intel_uncore *uncore = ggtt->vm.gt->uncore;
-
- spin_lock_irq(&uncore->lock);
- intel_uncore_write_fw(uncore, GFX_FLSH_CNTL_GEN6, GFX_FLSH_CNTL_EN);
- intel_uncore_read_fw(uncore, GFX_FLSH_CNTL_GEN6);
- spin_unlock_irq(&uncore->lock);
-}
-
-static void gen8_ggtt_invalidate(struct i915_ggtt *ggtt)
-{
- struct intel_uncore *uncore = ggtt->vm.gt->uncore;
-
- /*
- * Note that as an uncached mmio write, this will flush the
- * WCB of the writes into the GGTT before it triggers the invalidate.
- */
- intel_uncore_write_fw(uncore, GFX_FLSH_CNTL_GEN6, GFX_FLSH_CNTL_EN);
-}
-
-static void guc_ggtt_invalidate(struct i915_ggtt *ggtt)
-{
- struct intel_uncore *uncore = ggtt->vm.gt->uncore;
- struct drm_i915_private *i915 = ggtt->vm.i915;
-
- gen8_ggtt_invalidate(ggtt);
-
- if (INTEL_GEN(i915) >= 12)
- intel_uncore_write_fw(uncore, GEN12_GUC_TLB_INV_CR,
- GEN12_GUC_TLB_INV_CR_INVALIDATE);
- else
- intel_uncore_write_fw(uncore, GEN8_GTCR, GEN8_GTCR_INVALIDATE);
-}
-
-static void gmch_ggtt_invalidate(struct i915_ggtt *ggtt)
-{
- intel_gtt_chipset_flush();
-}
-
-static int ppgtt_bind_vma(struct i915_vma *vma,
- enum i915_cache_level cache_level,
- u32 flags)
-{
- u32 pte_flags;
- int err;
-
- if (flags & I915_VMA_ALLOC) {
- err = vma->vm->allocate_va_range(vma->vm,
- vma->node.start, vma->size);
- if (err)
- return err;
-
- set_bit(I915_VMA_ALLOC_BIT, __i915_vma_flags(vma));
- }
-
- /* Applicable to VLV, and gen8+ */
- pte_flags = 0;
- if (i915_gem_object_is_readonly(vma->obj))
- pte_flags |= PTE_READ_ONLY;
-
- GEM_BUG_ON(!test_bit(I915_VMA_ALLOC_BIT, __i915_vma_flags(vma)));
- vma->vm->insert_entries(vma->vm, vma, cache_level, pte_flags);
- wmb();
-
- return 0;
-}
-
-static void ppgtt_unbind_vma(struct i915_vma *vma)
-{
- if (test_and_clear_bit(I915_VMA_ALLOC_BIT, __i915_vma_flags(vma)))
- vma->vm->clear_range(vma->vm, vma->node.start, vma->size);
-}
-
-static int ppgtt_set_pages(struct i915_vma *vma)
-{
- GEM_BUG_ON(vma->pages);
-
- vma->pages = vma->obj->mm.pages;
-
- vma->page_sizes = vma->obj->mm.page_sizes;
-
- return 0;
-}
-
-static void clear_pages(struct i915_vma *vma)
-{
- GEM_BUG_ON(!vma->pages);
-
- if (vma->pages != vma->obj->mm.pages) {
- sg_free_table(vma->pages);
- kfree(vma->pages);
- }
- vma->pages = NULL;
-
- memset(&vma->page_sizes, 0, sizeof(vma->page_sizes));
-}
-
-static u64 gen8_pte_encode(dma_addr_t addr,
- enum i915_cache_level level,
- u32 flags)
-{
- gen8_pte_t pte = addr | _PAGE_PRESENT | _PAGE_RW;
-
- if (unlikely(flags & PTE_READ_ONLY))
- pte &= ~_PAGE_RW;
-
- switch (level) {
- case I915_CACHE_NONE:
- pte |= PPAT_UNCACHED;
- break;
- case I915_CACHE_WT:
- pte |= PPAT_DISPLAY_ELLC;
- break;
- default:
- pte |= PPAT_CACHED;
- break;
- }
-
- return pte;
-}
-
-static u64 gen8_pde_encode(const dma_addr_t addr,
- const enum i915_cache_level level)
-{
- u64 pde = _PAGE_PRESENT | _PAGE_RW;
- pde |= addr;
- if (level != I915_CACHE_NONE)
- pde |= PPAT_CACHED_PDE;
- else
- pde |= PPAT_UNCACHED;
- return pde;
-}
-
-static u64 snb_pte_encode(dma_addr_t addr,
- enum i915_cache_level level,
- u32 flags)
-{
- gen6_pte_t pte = GEN6_PTE_VALID;
- pte |= GEN6_PTE_ADDR_ENCODE(addr);
-
- switch (level) {
- case I915_CACHE_L3_LLC:
- case I915_CACHE_LLC:
- pte |= GEN6_PTE_CACHE_LLC;
- break;
- case I915_CACHE_NONE:
- pte |= GEN6_PTE_UNCACHED;
- break;
- default:
- MISSING_CASE(level);
- }
-
- return pte;
-}
-
-static u64 ivb_pte_encode(dma_addr_t addr,
- enum i915_cache_level level,
- u32 flags)
-{
- gen6_pte_t pte = GEN6_PTE_VALID;
- pte |= GEN6_PTE_ADDR_ENCODE(addr);
-
- switch (level) {
- case I915_CACHE_L3_LLC:
- pte |= GEN7_PTE_CACHE_L3_LLC;
- break;
- case I915_CACHE_LLC:
- pte |= GEN6_PTE_CACHE_LLC;
- break;
- case I915_CACHE_NONE:
- pte |= GEN6_PTE_UNCACHED;
- break;
- default:
- MISSING_CASE(level);
- }
-
- return pte;
-}
-
-static u64 byt_pte_encode(dma_addr_t addr,
- enum i915_cache_level level,
- u32 flags)
-{
- gen6_pte_t pte = GEN6_PTE_VALID;
- pte |= GEN6_PTE_ADDR_ENCODE(addr);
-
- if (!(flags & PTE_READ_ONLY))
- pte |= BYT_PTE_WRITEABLE;
-
- if (level != I915_CACHE_NONE)
- pte |= BYT_PTE_SNOOPED_BY_CPU_CACHES;
-
- return pte;
-}
-
-static u64 hsw_pte_encode(dma_addr_t addr,
- enum i915_cache_level level,
- u32 flags)
-{
- gen6_pte_t pte = GEN6_PTE_VALID;
- pte |= HSW_PTE_ADDR_ENCODE(addr);
-
- if (level != I915_CACHE_NONE)
- pte |= HSW_WB_LLC_AGE3;
-
- return pte;
-}
-
-static u64 iris_pte_encode(dma_addr_t addr,
- enum i915_cache_level level,
- u32 flags)
-{
- gen6_pte_t pte = GEN6_PTE_VALID;
- pte |= HSW_PTE_ADDR_ENCODE(addr);
-
- switch (level) {
- case I915_CACHE_NONE:
- break;
- case I915_CACHE_WT:
- pte |= HSW_WT_ELLC_LLC_AGE3;
- break;
- default:
- pte |= HSW_WB_ELLC_LLC_AGE3;
- break;
- }
-
- return pte;
-}
-
-static void stash_init(struct pagestash *stash)
-{
- pagevec_init(&stash->pvec);
- spin_lock_init(&stash->lock);
-}
-
-static struct page *stash_pop_page(struct pagestash *stash)
-{
- struct page *page = NULL;
-
- spin_lock(&stash->lock);
- if (likely(stash->pvec.nr))
- page = stash->pvec.pages[--stash->pvec.nr];
- spin_unlock(&stash->lock);
-
- return page;
-}
-
-static void stash_push_pagevec(struct pagestash *stash, struct pagevec *pvec)
-{
- unsigned int nr;
-
- spin_lock_nested(&stash->lock, SINGLE_DEPTH_NESTING);
-
- nr = min_t(typeof(nr), pvec->nr, pagevec_space(&stash->pvec));
- memcpy(stash->pvec.pages + stash->pvec.nr,
- pvec->pages + pvec->nr - nr,
- sizeof(pvec->pages[0]) * nr);
- stash->pvec.nr += nr;
-
- spin_unlock(&stash->lock);
-
- pvec->nr -= nr;
-}
-
-static struct page *vm_alloc_page(struct i915_address_space *vm, gfp_t gfp)
+int i915_gem_gtt_prepare_pages(struct drm_i915_gem_object *obj,
+ struct sg_table *pages)
{
- struct pagevec stack;
- struct page *page;
-
- if (I915_SELFTEST_ONLY(should_fail(&vm->fault_attr, 1)))
- i915_gem_shrink_all(vm->i915);
-
- page = stash_pop_page(&vm->free_pages);
- if (page)
- return page;
-
- if (!vm->pt_kmap_wc)
- return alloc_page(gfp);
-
- /* Look in our global stash of WC pages... */
- page = stash_pop_page(&vm->i915->mm.wc_stash);
- if (page)
- return page;
-
- /*
- * Otherwise batch allocate pages to amortize cost of set_pages_wc.
- *
- * We have to be careful as page allocation may trigger the shrinker
- * (via direct reclaim) which will fill up the WC stash underneath us.
- * So we add our WB pages into a temporary pvec on the stack and merge
- * them into the WC stash after all the allocations are complete.
- */
- pagevec_init(&stack);
do {
- struct page *page;
-
- page = alloc_page(gfp);
- if (unlikely(!page))
- break;
-
- stack.pages[stack.nr++] = page;
- } while (pagevec_space(&stack));
-
- if (stack.nr && !set_pages_array_wc(stack.pages, stack.nr)) {
- page = stack.pages[--stack.nr];
-
- /* Merge spare WC pages to the global stash */
- if (stack.nr)
- stash_push_pagevec(&vm->i915->mm.wc_stash, &stack);
-
- /* Push any surplus WC pages onto the local VM stash */
- if (stack.nr)
- stash_push_pagevec(&vm->free_pages, &stack);
- }
-
- /* Return unwanted leftovers */
- if (unlikely(stack.nr)) {
- WARN_ON_ONCE(set_pages_array_wb(stack.pages, stack.nr));
- __pagevec_release(&stack);
- }
-
- return page;
-}
-
-static void vm_free_pages_release(struct i915_address_space *vm,
- bool immediate)
-{
- struct pagevec *pvec = &vm->free_pages.pvec;
- struct pagevec stack;
-
- lockdep_assert_held(&vm->free_pages.lock);
- GEM_BUG_ON(!pagevec_count(pvec));
-
- if (vm->pt_kmap_wc) {
- /*
- * When we use WC, first fill up the global stash and then
- * only if full immediately free the overflow.
- */
- stash_push_pagevec(&vm->i915->mm.wc_stash, pvec);
-
- /*
- * As we have made some room in the VM's free_pages,
- * we can wait for it to fill again. Unless we are
- * inside i915_address_space_fini() and must
- * immediately release the pages!
- */
- if (pvec->nr <= (immediate ? 0 : PAGEVEC_SIZE - 1))
- return;
+ if (dma_map_sg_attrs(&obj->base.dev->pdev->dev,
+ pages->sgl, pages->nents,
+ PCI_DMA_BIDIRECTIONAL,
+ DMA_ATTR_NO_WARN))
+ return 0;
/*
- * We have to drop the lock to allow ourselves to sleep,
- * so take a copy of the pvec and clear the stash for
- * others to use it as we sleep.
+ * If the DMA remap fails, one cause can be that we have
+ * too many objects pinned in a small remapping table,
+ * such as swiotlb. Incrementally purge all other objects and
+ * try again - if there are no more pages to remove from
+ * the DMA remapper, i915_gem_shrink will return 0.
*/
- stack = *pvec;
- pagevec_reinit(pvec);
- spin_unlock(&vm->free_pages.lock);
-
- pvec = &stack;
- set_pages_array_wb(pvec->pages, pvec->nr);
-
- spin_lock(&vm->free_pages.lock);
- }
-
- __pagevec_release(pvec);
-}
-
-static void vm_free_page(struct i915_address_space *vm, struct page *page)
-{
- /*
- * On !llc, we need to change the pages back to WB. We only do so
- * in bulk, so we rarely need to change the page attributes here,
- * but doing so requires a stop_machine() from deep inside arch/x86/mm.
- * To make detection of the possible sleep more likely, use an
- * unconditional might_sleep() for everybody.
- */
- might_sleep();
- spin_lock(&vm->free_pages.lock);
- while (!pagevec_space(&vm->free_pages.pvec))
- vm_free_pages_release(vm, false);
- GEM_BUG_ON(pagevec_count(&vm->free_pages.pvec) >= PAGEVEC_SIZE);
- pagevec_add(&vm->free_pages.pvec, page);
- spin_unlock(&vm->free_pages.lock);
-}
-
-static void i915_address_space_fini(struct i915_address_space *vm)
-{
- spin_lock(&vm->free_pages.lock);
- if (pagevec_count(&vm->free_pages.pvec))
- vm_free_pages_release(vm, true);
- GEM_BUG_ON(pagevec_count(&vm->free_pages.pvec));
- spin_unlock(&vm->free_pages.lock);
-
- drm_mm_takedown(&vm->mm);
-
- mutex_destroy(&vm->mutex);
-}
-
-void __i915_vm_close(struct i915_address_space *vm)
-{
- struct i915_vma *vma, *vn;
-
- mutex_lock(&vm->mutex);
- list_for_each_entry_safe(vma, vn, &vm->bound_list, vm_link) {
- struct drm_i915_gem_object *obj = vma->obj;
-
- /* Keep the obj (and hence the vma) alive as _we_ destroy it */
- if (!kref_get_unless_zero(&obj->base.refcount))
- continue;
-
- atomic_and(~I915_VMA_PIN_MASK, &vma->flags);
- WARN_ON(__i915_vma_unbind(vma));
- __i915_vma_put(vma);
-
- i915_gem_object_put(obj);
- }
- GEM_BUG_ON(!list_empty(&vm->bound_list));
- mutex_unlock(&vm->mutex);
-}
-
-static void __i915_vm_release(struct work_struct *work)
-{
- struct i915_address_space *vm =
- container_of(work, struct i915_address_space, rcu.work);
-
- vm->cleanup(vm);
- i915_address_space_fini(vm);
-
- kfree(vm);
-}
-
-void i915_vm_release(struct kref *kref)
-{
- struct i915_address_space *vm =
- container_of(kref, struct i915_address_space, ref);
-
- GEM_BUG_ON(i915_is_ggtt(vm));
- trace_i915_ppgtt_release(vm);
-
- queue_rcu_work(vm->i915->wq, &vm->rcu);
-}
-
-static void i915_address_space_init(struct i915_address_space *vm, int subclass)
-{
- kref_init(&vm->ref);
- INIT_RCU_WORK(&vm->rcu, __i915_vm_release);
- atomic_set(&vm->open, 1);
-
- /*
- * The vm->mutex must be reclaim safe (for use in the shrinker).
- * Do a dummy acquire now under fs_reclaim so that any allocation
- * attempt holding the lock is immediately reported by lockdep.
- */
- mutex_init(&vm->mutex);
- lockdep_set_subclass(&vm->mutex, subclass);
- i915_gem_shrinker_taints_mutex(vm->i915, &vm->mutex);
-
- GEM_BUG_ON(!vm->total);
- drm_mm_init(&vm->mm, 0, vm->total);
- vm->mm.head_node.color = I915_COLOR_UNEVICTABLE;
-
- stash_init(&vm->free_pages);
-
- INIT_LIST_HEAD(&vm->bound_list);
-}
-
-static int __setup_page_dma(struct i915_address_space *vm,
- struct i915_page_dma *p,
- gfp_t gfp)
-{
- p->page = vm_alloc_page(vm, gfp | I915_GFP_ALLOW_FAIL);
- if (unlikely(!p->page))
- return -ENOMEM;
-
- p->daddr = dma_map_page_attrs(vm->dma,
- p->page, 0, PAGE_SIZE,
- PCI_DMA_BIDIRECTIONAL,
- DMA_ATTR_SKIP_CPU_SYNC |
- DMA_ATTR_NO_WARN);
- if (unlikely(dma_mapping_error(vm->dma, p->daddr))) {
- vm_free_page(vm, p->page);
- return -ENOMEM;
- }
-
- return 0;
-}
-
-static int setup_page_dma(struct i915_address_space *vm,
- struct i915_page_dma *p)
-{
- return __setup_page_dma(vm, p, __GFP_HIGHMEM);
-}
-
-static void cleanup_page_dma(struct i915_address_space *vm,
- struct i915_page_dma *p)
-{
- dma_unmap_page(vm->dma, p->daddr, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
- vm_free_page(vm, p->page);
-}
-
-#define kmap_atomic_px(px) kmap_atomic(px_base(px)->page)
+ GEM_BUG_ON(obj->mm.pages == pages);
+ } while (i915_gem_shrink(to_i915(obj->base.dev),
+ obj->base.size >> PAGE_SHIFT, NULL,
+ I915_SHRINK_BOUND |
+ I915_SHRINK_UNBOUND));
-static void
-fill_page_dma(const struct i915_page_dma *p, const u64 val, unsigned int count)
-{
- kunmap_atomic(memset64(kmap_atomic(p->page), val, count));
+ return -ENOSPC;
}
-#define fill_px(px, v) fill_page_dma(px_base(px), (v), PAGE_SIZE / sizeof(u64))
-#define fill32_px(px, v) do { \
- u64 v__ = lower_32_bits(v); \
- fill_px((px), v__ << 32 | v__); \
-} while (0)
-
-static int
-setup_scratch_page(struct i915_address_space *vm, gfp_t gfp)
+void i915_gem_gtt_finish_pages(struct drm_i915_gem_object *obj,
+ struct sg_table *pages)
{
- unsigned long size;
+ struct drm_i915_private *dev_priv = to_i915(obj->base.dev);
+ struct device *kdev = &dev_priv->drm.pdev->dev;
+ struct i915_ggtt *ggtt = &dev_priv->ggtt;
- /*
- * In order to utilize 64K pages for an object with a size < 2M, we will
- * need to support a 64K scratch page, given that every 16th entry for a
- * page-table operating in 64K mode must point to a properly aligned 64K
- * region, including any PTEs which happen to point to scratch.
- *
- * This is only relevant for the 48b PPGTT where we support
- * huge-gtt-pages, see also i915_vma_insert(). However, as we share the
- * scratch (read-only) between all vm, we create one 64k scratch page
- * for all.
- */
- size = I915_GTT_PAGE_SIZE_4K;
- if (i915_vm_is_4lvl(vm) &&
- HAS_PAGE_SIZES(vm->i915, I915_GTT_PAGE_SIZE_64K)) {
- size = I915_GTT_PAGE_SIZE_64K;
- gfp |= __GFP_NOWARN;
+ if (unlikely(ggtt->do_idle_maps)) {
+ /* XXX This does not prevent more requests being submitted! */
+ if (intel_gt_retire_requests_timeout(ggtt->vm.gt,
+ -MAX_SCHEDULE_TIMEOUT)) {
+ DRM_ERROR("Failed to wait for idle; VT'd may hang.\n");
+ /* Wait a bit, in hopes it avoids the hang */
+ udelay(10);
+ }
}
- gfp |= __GFP_ZERO | __GFP_RETRY_MAYFAIL;
-
- do {
- unsigned int order = get_order(size);
- struct page *page;
- dma_addr_t addr;
- page = alloc_pages(gfp, order);
- if (unlikely(!page))
- goto skip;
-
- addr = dma_map_page_attrs(vm->dma,
- page, 0, size,
- PCI_DMA_BIDIRECTIONAL,
- DMA_ATTR_SKIP_CPU_SYNC |
- DMA_ATTR_NO_WARN);
- if (unlikely(dma_mapping_error(vm->dma, addr)))
- goto free_page;
-
- if (unlikely(!IS_ALIGNED(addr, size)))
- goto unmap_page;
-
- vm->scratch[0].base.page = page;
- vm->scratch[0].base.daddr = addr;
- vm->scratch_order = order;
- return 0;
-
-unmap_page:
- dma_unmap_page(vm->dma, addr, size, PCI_DMA_BIDIRECTIONAL);
-free_page:
- __free_pages(page, order);
-skip:
- if (size == I915_GTT_PAGE_SIZE_4K)
- return -ENOMEM;
-
- size = I915_GTT_PAGE_SIZE_4K;
- gfp &= ~__GFP_NOWARN;
- } while (1);
-}
-
-static void cleanup_scratch_page(struct i915_address_space *vm)
-{
- struct i915_page_dma *p = px_base(&vm->scratch[0]);
- unsigned int order = vm->scratch_order;
-
- dma_unmap_page(vm->dma, p->daddr, BIT(order) << PAGE_SHIFT,
- PCI_DMA_BIDIRECTIONAL);
- __free_pages(p->page, order);
-}
-
-static void free_scratch(struct i915_address_space *vm)
-{
- int i;
-
- if (!px_dma(&vm->scratch[0])) /* set to 0 on clones */
- return;
-
- for (i = 1; i <= vm->top; i++) {
- if (!px_dma(&vm->scratch[i]))
- break;
- cleanup_page_dma(vm, px_base(&vm->scratch[i]));
- }
-
- cleanup_scratch_page(vm);
-}
-
-static struct i915_page_table *alloc_pt(struct i915_address_space *vm)
-{
- struct i915_page_table *pt;
-
- pt = kmalloc(sizeof(*pt), I915_GFP_ALLOW_FAIL);
- if (unlikely(!pt))
- return ERR_PTR(-ENOMEM);
-
- if (unlikely(setup_page_dma(vm, &pt->base))) {
- kfree(pt);
- return ERR_PTR(-ENOMEM);
- }
-
- atomic_set(&pt->used, 0);
- return pt;
-}
-
-static struct i915_page_directory *__alloc_pd(size_t sz)
-{
- struct i915_page_directory *pd;
-
- pd = kzalloc(sz, I915_GFP_ALLOW_FAIL);
- if (unlikely(!pd))
- return NULL;
-
- spin_lock_init(&pd->lock);
- return pd;
-}
-
-static struct i915_page_directory *alloc_pd(struct i915_address_space *vm)
-{
- struct i915_page_directory *pd;
-
- pd = __alloc_pd(sizeof(*pd));
- if (unlikely(!pd))
- return ERR_PTR(-ENOMEM);
-
- if (unlikely(setup_page_dma(vm, px_base(pd)))) {
- kfree(pd);
- return ERR_PTR(-ENOMEM);
- }
-
- return pd;
-}
-
-static void free_pd(struct i915_address_space *vm, struct i915_page_dma *pd)
-{
- cleanup_page_dma(vm, pd);
- kfree(pd);
-}
-
-#define free_px(vm, px) free_pd(vm, px_base(px))
-
-static inline void
-write_dma_entry(struct i915_page_dma * const pdma,
- const unsigned short idx,
- const u64 encoded_entry)
-{
- u64 * const vaddr = kmap_atomic(pdma->page);
-
- vaddr[idx] = encoded_entry;
- kunmap_atomic(vaddr);
-}
-
-static inline void
-__set_pd_entry(struct i915_page_directory * const pd,
- const unsigned short idx,
- struct i915_page_dma * const to,
- u64 (*encode)(const dma_addr_t, const enum i915_cache_level))
-{
- /* Each thread pre-pins the pd, and we may have a thread per pde. */
- GEM_BUG_ON(atomic_read(px_used(pd)) > NALLOC * ARRAY_SIZE(pd->entry));
-
- atomic_inc(px_used(pd));
- pd->entry[idx] = to;
- write_dma_entry(px_base(pd), idx, encode(to->daddr, I915_CACHE_LLC));
-}
-
-#define set_pd_entry(pd, idx, to) \
- __set_pd_entry((pd), (idx), px_base(to), gen8_pde_encode)
-
-static inline void
-clear_pd_entry(struct i915_page_directory * const pd,
- const unsigned short idx,
- const struct i915_page_scratch * const scratch)
-{
- GEM_BUG_ON(atomic_read(px_used(pd)) == 0);
-
- write_dma_entry(px_base(pd), idx, scratch->encode);
- pd->entry[idx] = NULL;
- atomic_dec(px_used(pd));
-}
-
-static bool
-release_pd_entry(struct i915_page_directory * const pd,
- const unsigned short idx,
- struct i915_page_table * const pt,
- const struct i915_page_scratch * const scratch)
-{
- bool free = false;
-
- if (atomic_add_unless(&pt->used, -1, 1))
- return false;
-
- spin_lock(&pd->lock);
- if (atomic_dec_and_test(&pt->used)) {
- clear_pd_entry(pd, idx, scratch);
- free = true;
- }
- spin_unlock(&pd->lock);
-
- return free;
-}
-
-static void gen8_ppgtt_notify_vgt(struct i915_ppgtt *ppgtt, bool create)
-{
- struct drm_i915_private *dev_priv = ppgtt->vm.i915;
- enum vgt_g2v_type msg;
- int i;
-
- if (create)
- atomic_inc(px_used(ppgtt->pd)); /* never remove */
- else
- atomic_dec(px_used(ppgtt->pd));
-
- mutex_lock(&dev_priv->vgpu.lock);
-
- if (i915_vm_is_4lvl(&ppgtt->vm)) {
- const u64 daddr = px_dma(ppgtt->pd);
-
- I915_WRITE(vgtif_reg(pdp[0].lo), lower_32_bits(daddr));
- I915_WRITE(vgtif_reg(pdp[0].hi), upper_32_bits(daddr));
-
- msg = (create ? VGT_G2V_PPGTT_L4_PAGE_TABLE_CREATE :
- VGT_G2V_PPGTT_L4_PAGE_TABLE_DESTROY);
- } else {
- for (i = 0; i < GEN8_3LVL_PDPES; i++) {
- const u64 daddr = i915_page_dir_dma_addr(ppgtt, i);
-
- I915_WRITE(vgtif_reg(pdp[i].lo), lower_32_bits(daddr));
- I915_WRITE(vgtif_reg(pdp[i].hi), upper_32_bits(daddr));
- }
-
- msg = (create ? VGT_G2V_PPGTT_L3_PAGE_TABLE_CREATE :
- VGT_G2V_PPGTT_L3_PAGE_TABLE_DESTROY);
- }
-
- /* g2v_notify atomically (via hv trap) consumes the message packet. */
- I915_WRITE(vgtif_reg(g2v_notify), msg);
-
- mutex_unlock(&dev_priv->vgpu.lock);
-}
-
-/* Index shifts into the pagetable are offset by GEN8_PTE_SHIFT [12] */
-#define GEN8_PAGE_SIZE (SZ_4K) /* page and page-directory sizes are the same */
-#define GEN8_PTE_SHIFT (ilog2(GEN8_PAGE_SIZE))
-#define GEN8_PDES (GEN8_PAGE_SIZE / sizeof(u64))
-#define gen8_pd_shift(lvl) ((lvl) * ilog2(GEN8_PDES))
-#define gen8_pd_index(i, lvl) i915_pde_index((i), gen8_pd_shift(lvl))
-#define __gen8_pte_shift(lvl) (GEN8_PTE_SHIFT + gen8_pd_shift(lvl))
-#define __gen8_pte_index(a, lvl) i915_pde_index((a), __gen8_pte_shift(lvl))
-
-static inline unsigned int
-gen8_pd_range(u64 start, u64 end, int lvl, unsigned int *idx)
-{
- const int shift = gen8_pd_shift(lvl);
- const u64 mask = ~0ull << gen8_pd_shift(lvl + 1);
-
- GEM_BUG_ON(start >= end);
- end += ~mask >> gen8_pd_shift(1);
-
- *idx = i915_pde_index(start, shift);
- if ((start ^ end) & mask)
- return GEN8_PDES - *idx;
- else
- return i915_pde_index(end, shift) - *idx;
-}
-
-static inline bool gen8_pd_contains(u64 start, u64 end, int lvl)
-{
- const u64 mask = ~0ull << gen8_pd_shift(lvl + 1);
-
- GEM_BUG_ON(start >= end);
- return (start ^ end) & mask && (start & ~mask) == 0;
-}
-
-static inline unsigned int gen8_pt_count(u64 start, u64 end)
-{
- GEM_BUG_ON(start >= end);
- if ((start ^ end) >> gen8_pd_shift(1))
- return GEN8_PDES - (start & (GEN8_PDES - 1));
- else
- return end - start;
-}
-
-static inline unsigned int gen8_pd_top_count(const struct i915_address_space *vm)
-{
- unsigned int shift = __gen8_pte_shift(vm->top);
- return (vm->total + (1ull << shift) - 1) >> shift;
-}
-
-static inline struct i915_page_directory *
-gen8_pdp_for_page_index(struct i915_address_space * const vm, const u64 idx)
-{
- struct i915_ppgtt * const ppgtt = i915_vm_to_ppgtt(vm);
-
- if (vm->top == 2)
- return ppgtt->pd;
- else
- return i915_pd_entry(ppgtt->pd, gen8_pd_index(idx, vm->top));
-}
-
-static inline struct i915_page_directory *
-gen8_pdp_for_page_address(struct i915_address_space * const vm, const u64 addr)
-{
- return gen8_pdp_for_page_index(vm, addr >> GEN8_PTE_SHIFT);
-}
-
-static void __gen8_ppgtt_cleanup(struct i915_address_space *vm,
- struct i915_page_directory *pd,
- int count, int lvl)
-{
- if (lvl) {
- void **pde = pd->entry;
-
- do {
- if (!*pde)
- continue;
-
- __gen8_ppgtt_cleanup(vm, *pde, GEN8_PDES, lvl - 1);
- } while (pde++, --count);
- }
-
- free_px(vm, pd);
-}
-
-static void gen8_ppgtt_cleanup(struct i915_address_space *vm)
-{
- struct i915_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
-
- if (intel_vgpu_active(vm->i915))
- gen8_ppgtt_notify_vgt(ppgtt, false);
-
- __gen8_ppgtt_cleanup(vm, ppgtt->pd, gen8_pd_top_count(vm), vm->top);
- free_scratch(vm);
-}
-
-static u64 __gen8_ppgtt_clear(struct i915_address_space * const vm,
- struct i915_page_directory * const pd,
- u64 start, const u64 end, int lvl)
-{
- const struct i915_page_scratch * const scratch = &vm->scratch[lvl];
- unsigned int idx, len;
-
- GEM_BUG_ON(end > vm->total >> GEN8_PTE_SHIFT);
-
- len = gen8_pd_range(start, end, lvl--, &idx);
- DBG("%s(%p):{ lvl:%d, start:%llx, end:%llx, idx:%d, len:%d, used:%d }\n",
- __func__, vm, lvl + 1, start, end,
- idx, len, atomic_read(px_used(pd)));
- GEM_BUG_ON(!len || len >= atomic_read(px_used(pd)));
-
- do {
- struct i915_page_table *pt = pd->entry[idx];
-
- if (atomic_fetch_inc(&pt->used) >> gen8_pd_shift(1) &&
- gen8_pd_contains(start, end, lvl)) {
- DBG("%s(%p):{ lvl:%d, idx:%d, start:%llx, end:%llx } removing pd\n",
- __func__, vm, lvl + 1, idx, start, end);
- clear_pd_entry(pd, idx, scratch);
- __gen8_ppgtt_cleanup(vm, as_pd(pt), I915_PDES, lvl);
- start += (u64)I915_PDES << gen8_pd_shift(lvl);
- continue;
- }
-
- if (lvl) {
- start = __gen8_ppgtt_clear(vm, as_pd(pt),
- start, end, lvl);
- } else {
- unsigned int count;
- u64 *vaddr;
-
- count = gen8_pt_count(start, end);
- DBG("%s(%p):{ lvl:%d, start:%llx, end:%llx, idx:%d, len:%d, used:%d } removing pte\n",
- __func__, vm, lvl, start, end,
- gen8_pd_index(start, 0), count,
- atomic_read(&pt->used));
- GEM_BUG_ON(!count || count >= atomic_read(&pt->used));
-
- vaddr = kmap_atomic_px(pt);
- memset64(vaddr + gen8_pd_index(start, 0),
- vm->scratch[0].encode,
- count);
- kunmap_atomic(vaddr);
-
- atomic_sub(count, &pt->used);
- start += count;
- }
-
- if (release_pd_entry(pd, idx, pt, scratch))
- free_px(vm, pt);
- } while (idx++, --len);
-
- return start;
-}
-
-static void gen8_ppgtt_clear(struct i915_address_space *vm,
- u64 start, u64 length)
-{
- GEM_BUG_ON(!IS_ALIGNED(start, BIT_ULL(GEN8_PTE_SHIFT)));
- GEM_BUG_ON(!IS_ALIGNED(length, BIT_ULL(GEN8_PTE_SHIFT)));
- GEM_BUG_ON(range_overflows(start, length, vm->total));
-
- start >>= GEN8_PTE_SHIFT;
- length >>= GEN8_PTE_SHIFT;
- GEM_BUG_ON(length == 0);
-
- __gen8_ppgtt_clear(vm, i915_vm_to_ppgtt(vm)->pd,
- start, start + length, vm->top);
-}
-
-static int __gen8_ppgtt_alloc(struct i915_address_space * const vm,
- struct i915_page_directory * const pd,
- u64 * const start, const u64 end, int lvl)
-{
- const struct i915_page_scratch * const scratch = &vm->scratch[lvl];
- struct i915_page_table *alloc = NULL;
- unsigned int idx, len;
- int ret = 0;
-
- GEM_BUG_ON(end > vm->total >> GEN8_PTE_SHIFT);
-
- len = gen8_pd_range(*start, end, lvl--, &idx);
- DBG("%s(%p):{ lvl:%d, start:%llx, end:%llx, idx:%d, len:%d, used:%d }\n",
- __func__, vm, lvl + 1, *start, end,
- idx, len, atomic_read(px_used(pd)));
- GEM_BUG_ON(!len || (idx + len - 1) >> gen8_pd_shift(1));
-
- spin_lock(&pd->lock);
- GEM_BUG_ON(!atomic_read(px_used(pd))); /* Must be pinned! */
- do {
- struct i915_page_table *pt = pd->entry[idx];
-
- if (!pt) {
- spin_unlock(&pd->lock);
-
- DBG("%s(%p):{ lvl:%d, idx:%d } allocating new tree\n",
- __func__, vm, lvl + 1, idx);
-
- pt = fetch_and_zero(&alloc);
- if (lvl) {
- if (!pt) {
- pt = &alloc_pd(vm)->pt;
- if (IS_ERR(pt)) {
- ret = PTR_ERR(pt);
- goto out;
- }
- }
-
- fill_px(pt, vm->scratch[lvl].encode);
- } else {
- if (!pt) {
- pt = alloc_pt(vm);
- if (IS_ERR(pt)) {
- ret = PTR_ERR(pt);
- goto out;
- }
- }
-
- if (intel_vgpu_active(vm->i915) ||
- gen8_pt_count(*start, end) < I915_PDES)
- fill_px(pt, vm->scratch[lvl].encode);
- }
-
- spin_lock(&pd->lock);
- if (likely(!pd->entry[idx]))
- set_pd_entry(pd, idx, pt);
- else
- alloc = pt, pt = pd->entry[idx];
- }
-
- if (lvl) {
- atomic_inc(&pt->used);
- spin_unlock(&pd->lock);
-
- ret = __gen8_ppgtt_alloc(vm, as_pd(pt),
- start, end, lvl);
- if (unlikely(ret)) {
- if (release_pd_entry(pd, idx, pt, scratch))
- free_px(vm, pt);
- goto out;
- }
-
- spin_lock(&pd->lock);
- atomic_dec(&pt->used);
- GEM_BUG_ON(!atomic_read(&pt->used));
- } else {
- unsigned int count = gen8_pt_count(*start, end);
-
- DBG("%s(%p):{ lvl:%d, start:%llx, end:%llx, idx:%d, len:%d, used:%d } inserting pte\n",
- __func__, vm, lvl, *start, end,
- gen8_pd_index(*start, 0), count,
- atomic_read(&pt->used));
-
- atomic_add(count, &pt->used);
- /* All other pdes may be simultaneously removed */
- GEM_BUG_ON(atomic_read(&pt->used) > NALLOC * I915_PDES);
- *start += count;
- }
- } while (idx++, --len);
- spin_unlock(&pd->lock);
-out:
- if (alloc)
- free_px(vm, alloc);
- return ret;
-}
-
-static int gen8_ppgtt_alloc(struct i915_address_space *vm,
- u64 start, u64 length)
-{
- u64 from;
- int err;
-
- GEM_BUG_ON(!IS_ALIGNED(start, BIT_ULL(GEN8_PTE_SHIFT)));
- GEM_BUG_ON(!IS_ALIGNED(length, BIT_ULL(GEN8_PTE_SHIFT)));
- GEM_BUG_ON(range_overflows(start, length, vm->total));
-
- start >>= GEN8_PTE_SHIFT;
- length >>= GEN8_PTE_SHIFT;
- GEM_BUG_ON(length == 0);
- from = start;
-
- err = __gen8_ppgtt_alloc(vm, i915_vm_to_ppgtt(vm)->pd,
- &start, start + length, vm->top);
- if (unlikely(err && from != start))
- __gen8_ppgtt_clear(vm, i915_vm_to_ppgtt(vm)->pd,
- from, start, vm->top);
-
- return err;
-}
-
-static inline struct sgt_dma {
- struct scatterlist *sg;
- dma_addr_t dma, max;
-} sgt_dma(struct i915_vma *vma) {
- struct scatterlist *sg = vma->pages->sgl;
- dma_addr_t addr = sg_dma_address(sg);
- return (struct sgt_dma) { sg, addr, addr + sg->length };
-}
-
-static __always_inline u64
-gen8_ppgtt_insert_pte(struct i915_ppgtt *ppgtt,
- struct i915_page_directory *pdp,
- struct sgt_dma *iter,
- u64 idx,
- enum i915_cache_level cache_level,
- u32 flags)
-{
- struct i915_page_directory *pd;
- const gen8_pte_t pte_encode = gen8_pte_encode(0, cache_level, flags);
- gen8_pte_t *vaddr;
-
- pd = i915_pd_entry(pdp, gen8_pd_index(idx, 2));
- vaddr = kmap_atomic_px(i915_pt_entry(pd, gen8_pd_index(idx, 1)));
- do {
- vaddr[gen8_pd_index(idx, 0)] = pte_encode | iter->dma;
-
- iter->dma += I915_GTT_PAGE_SIZE;
- if (iter->dma >= iter->max) {
- iter->sg = __sg_next(iter->sg);
- if (!iter->sg) {
- idx = 0;
- break;
- }
-
- iter->dma = sg_dma_address(iter->sg);
- iter->max = iter->dma + iter->sg->length;
- }
-
- if (gen8_pd_index(++idx, 0) == 0) {
- if (gen8_pd_index(idx, 1) == 0) {
- /* Limited by sg length for 3lvl */
- if (gen8_pd_index(idx, 2) == 0)
- break;
-
- pd = pdp->entry[gen8_pd_index(idx, 2)];
- }
-
- kunmap_atomic(vaddr);
- vaddr = kmap_atomic_px(i915_pt_entry(pd, gen8_pd_index(idx, 1)));
- }
- } while (1);
- kunmap_atomic(vaddr);
-
- return idx;
-}
-
-static void gen8_ppgtt_insert_huge(struct i915_vma *vma,
- struct sgt_dma *iter,
- enum i915_cache_level cache_level,
- u32 flags)
-{
- const gen8_pte_t pte_encode = gen8_pte_encode(0, cache_level, flags);
- u64 start = vma->node.start;
- dma_addr_t rem = iter->sg->length;
-
- GEM_BUG_ON(!i915_vm_is_4lvl(vma->vm));
-
- do {
- struct i915_page_directory * const pdp =
- gen8_pdp_for_page_address(vma->vm, start);
- struct i915_page_directory * const pd =
- i915_pd_entry(pdp, __gen8_pte_index(start, 2));
- gen8_pte_t encode = pte_encode;
- unsigned int maybe_64K = -1;
- unsigned int page_size;
- gen8_pte_t *vaddr;
- u16 index;
-
- if (vma->page_sizes.sg & I915_GTT_PAGE_SIZE_2M &&
- IS_ALIGNED(iter->dma, I915_GTT_PAGE_SIZE_2M) &&
- rem >= I915_GTT_PAGE_SIZE_2M &&
- !__gen8_pte_index(start, 0)) {
- index = __gen8_pte_index(start, 1);
- encode |= GEN8_PDE_PS_2M;
- page_size = I915_GTT_PAGE_SIZE_2M;
-
- vaddr = kmap_atomic_px(pd);
- } else {
- struct i915_page_table *pt =
- i915_pt_entry(pd, __gen8_pte_index(start, 1));
-
- index = __gen8_pte_index(start, 0);
- page_size = I915_GTT_PAGE_SIZE;
-
- if (!index &&
- vma->page_sizes.sg & I915_GTT_PAGE_SIZE_64K &&
- IS_ALIGNED(iter->dma, I915_GTT_PAGE_SIZE_64K) &&
- (IS_ALIGNED(rem, I915_GTT_PAGE_SIZE_64K) ||
- rem >= (I915_PDES - index) * I915_GTT_PAGE_SIZE))
- maybe_64K = __gen8_pte_index(start, 1);
-
- vaddr = kmap_atomic_px(pt);
- }
-
- do {
- GEM_BUG_ON(iter->sg->length < page_size);
- vaddr[index++] = encode | iter->dma;
-
- start += page_size;
- iter->dma += page_size;
- rem -= page_size;
- if (iter->dma >= iter->max) {
- iter->sg = __sg_next(iter->sg);
- if (!iter->sg)
- break;
-
- rem = iter->sg->length;
- iter->dma = sg_dma_address(iter->sg);
- iter->max = iter->dma + rem;
-
- if (maybe_64K != -1 && index < I915_PDES &&
- !(IS_ALIGNED(iter->dma, I915_GTT_PAGE_SIZE_64K) &&
- (IS_ALIGNED(rem, I915_GTT_PAGE_SIZE_64K) ||
- rem >= (I915_PDES - index) * I915_GTT_PAGE_SIZE)))
- maybe_64K = -1;
-
- if (unlikely(!IS_ALIGNED(iter->dma, page_size)))
- break;
- }
- } while (rem >= page_size && index < I915_PDES);
-
- kunmap_atomic(vaddr);
-
- /*
- * Is it safe to mark the 2M block as 64K? -- Either we have
- * filled whole page-table with 64K entries, or filled part of
- * it and have reached the end of the sg table and we have
- * enough padding.
- */
- if (maybe_64K != -1 &&
- (index == I915_PDES ||
- (i915_vm_has_scratch_64K(vma->vm) &&
- !iter->sg && IS_ALIGNED(vma->node.start +
- vma->node.size,
- I915_GTT_PAGE_SIZE_2M)))) {
- vaddr = kmap_atomic_px(pd);
- vaddr[maybe_64K] |= GEN8_PDE_IPS_64K;
- kunmap_atomic(vaddr);
- page_size = I915_GTT_PAGE_SIZE_64K;
-
- /*
- * We write all 4K page entries, even when using 64K
- * pages. In order to verify that the HW isn't cheating
- * by using the 4K PTE instead of the 64K PTE, we want
- * to remove all the surplus entries. If the HW skipped
- * the 64K PTE, it will read/write into the scratch page
- * instead - which we detect as missing results during
- * selftests.
- */
- if (I915_SELFTEST_ONLY(vma->vm->scrub_64K)) {
- u16 i;
-
- encode = vma->vm->scratch[0].encode;
- vaddr = kmap_atomic_px(i915_pt_entry(pd, maybe_64K));
-
- for (i = 1; i < index; i += 16)
- memset64(vaddr + i, encode, 15);
-
- kunmap_atomic(vaddr);
- }
- }
-
- vma->page_sizes.gtt |= page_size;
- } while (iter->sg);
-}
-
-static void gen8_ppgtt_insert(struct i915_address_space *vm,
- struct i915_vma *vma,
- enum i915_cache_level cache_level,
- u32 flags)
-{
- struct i915_ppgtt * const ppgtt = i915_vm_to_ppgtt(vm);
- struct sgt_dma iter = sgt_dma(vma);
-
- if (vma->page_sizes.sg > I915_GTT_PAGE_SIZE) {
- gen8_ppgtt_insert_huge(vma, &iter, cache_level, flags);
- } else {
- u64 idx = vma->node.start >> GEN8_PTE_SHIFT;
-
- do {
- struct i915_page_directory * const pdp =
- gen8_pdp_for_page_index(vm, idx);
-
- idx = gen8_ppgtt_insert_pte(ppgtt, pdp, &iter, idx,
- cache_level, flags);
- } while (idx);
-
- vma->page_sizes.gtt = I915_GTT_PAGE_SIZE;
- }
-}
-
-static int gen8_init_scratch(struct i915_address_space *vm)
-{
- int ret;
- int i;
-
- /*
- * If everybody agrees to not to write into the scratch page,
- * we can reuse it for all vm, keeping contexts and processes separate.
- */
- if (vm->has_read_only && vm->gt->vm && !i915_is_ggtt(vm->gt->vm)) {
- struct i915_address_space *clone = vm->gt->vm;
-
- GEM_BUG_ON(!clone->has_read_only);
-
- vm->scratch_order = clone->scratch_order;
- memcpy(vm->scratch, clone->scratch, sizeof(vm->scratch));
- px_dma(&vm->scratch[0]) = 0; /* no xfer of ownership */
- return 0;
- }
-
- ret = setup_scratch_page(vm, __GFP_HIGHMEM);
- if (ret)
- return ret;
-
- vm->scratch[0].encode =
- gen8_pte_encode(px_dma(&vm->scratch[0]),
- I915_CACHE_LLC, vm->has_read_only);
-
- for (i = 1; i <= vm->top; i++) {
- if (unlikely(setup_page_dma(vm, px_base(&vm->scratch[i]))))
- goto free_scratch;
-
- fill_px(&vm->scratch[i], vm->scratch[i - 1].encode);
- vm->scratch[i].encode =
- gen8_pde_encode(px_dma(&vm->scratch[i]),
- I915_CACHE_LLC);
- }
-
- return 0;
-
-free_scratch:
- free_scratch(vm);
- return -ENOMEM;
-}
-
-static int gen8_preallocate_top_level_pdp(struct i915_ppgtt *ppgtt)
-{
- struct i915_address_space *vm = &ppgtt->vm;
- struct i915_page_directory *pd = ppgtt->pd;
- unsigned int idx;
-
- GEM_BUG_ON(vm->top != 2);
- GEM_BUG_ON(gen8_pd_top_count(vm) != GEN8_3LVL_PDPES);
-
- for (idx = 0; idx < GEN8_3LVL_PDPES; idx++) {
- struct i915_page_directory *pde;
-
- pde = alloc_pd(vm);
- if (IS_ERR(pde))
- return PTR_ERR(pde);
-
- fill_px(pde, vm->scratch[1].encode);
- set_pd_entry(pd, idx, pde);
- atomic_inc(px_used(pde)); /* keep pinned */
- }
- wmb();
-
- return 0;
-}
-
-static void ppgtt_init(struct i915_ppgtt *ppgtt, struct intel_gt *gt)
-{
- struct drm_i915_private *i915 = gt->i915;
-
- ppgtt->vm.gt = gt;
- ppgtt->vm.i915 = i915;
- ppgtt->vm.dma = &i915->drm.pdev->dev;
- ppgtt->vm.total = BIT_ULL(INTEL_INFO(i915)->ppgtt_size);
-
- i915_address_space_init(&ppgtt->vm, VM_CLASS_PPGTT);
-
- ppgtt->vm.vma_ops.bind_vma = ppgtt_bind_vma;
- ppgtt->vm.vma_ops.unbind_vma = ppgtt_unbind_vma;
- ppgtt->vm.vma_ops.set_pages = ppgtt_set_pages;
- ppgtt->vm.vma_ops.clear_pages = clear_pages;
-}
-
-static struct i915_page_directory *
-gen8_alloc_top_pd(struct i915_address_space *vm)
-{
- const unsigned int count = gen8_pd_top_count(vm);
- struct i915_page_directory *pd;
-
- GEM_BUG_ON(count > ARRAY_SIZE(pd->entry));
-
- pd = __alloc_pd(offsetof(typeof(*pd), entry[count]));
- if (unlikely(!pd))
- return ERR_PTR(-ENOMEM);
-
- if (unlikely(setup_page_dma(vm, px_base(pd)))) {
- kfree(pd);
- return ERR_PTR(-ENOMEM);
- }
-
- fill_page_dma(px_base(pd), vm->scratch[vm->top].encode, count);
- atomic_inc(px_used(pd)); /* mark as pinned */
- return pd;
-}
-
-/*
- * GEN8 legacy ppgtt programming is accomplished through a max 4 PDP registers
- * with a net effect resembling a 2-level page table in normal x86 terms. Each
- * PDP represents 1GB of memory 4 * 512 * 512 * 4096 = 4GB legacy 32b address
- * space.
- *
- */
-static struct i915_ppgtt *gen8_ppgtt_create(struct drm_i915_private *i915)
-{
- struct i915_ppgtt *ppgtt;
- int err;
-
- ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL);
- if (!ppgtt)
- return ERR_PTR(-ENOMEM);
-
- ppgtt_init(ppgtt, &i915->gt);
- ppgtt->vm.top = i915_vm_is_4lvl(&ppgtt->vm) ? 3 : 2;
-
- /*
- * From bdw, there is hw support for read-only pages in the PPGTT.
- *
- * Gen11 has HSDES#:1807136187 unresolved. Disable ro support
- * for now.
- *
- * Gen12 has inherited the same read-only fault issue from gen11.
- */
- ppgtt->vm.has_read_only = !IS_GEN_RANGE(i915, 11, 12);
-
- /* There are only few exceptions for gen >=6. chv and bxt.
- * And we are not sure about the latter so play safe for now.
- */
- if (IS_CHERRYVIEW(i915) || IS_BROXTON(i915))
- ppgtt->vm.pt_kmap_wc = true;
-
- err = gen8_init_scratch(&ppgtt->vm);
- if (err)
- goto err_free;
-
- ppgtt->pd = gen8_alloc_top_pd(&ppgtt->vm);
- if (IS_ERR(ppgtt->pd)) {
- err = PTR_ERR(ppgtt->pd);
- goto err_free_scratch;
- }
-
- if (!i915_vm_is_4lvl(&ppgtt->vm)) {
- err = gen8_preallocate_top_level_pdp(ppgtt);
- if (err)
- goto err_free_pd;
- }
-
- ppgtt->vm.bind_async_flags = I915_VMA_LOCAL_BIND;
- ppgtt->vm.insert_entries = gen8_ppgtt_insert;
- ppgtt->vm.allocate_va_range = gen8_ppgtt_alloc;
- ppgtt->vm.clear_range = gen8_ppgtt_clear;
-
- if (intel_vgpu_active(i915))
- gen8_ppgtt_notify_vgt(ppgtt, true);
-
- ppgtt->vm.cleanup = gen8_ppgtt_cleanup;
-
- return ppgtt;
-
-err_free_pd:
- __gen8_ppgtt_cleanup(&ppgtt->vm, ppgtt->pd,
- gen8_pd_top_count(&ppgtt->vm), ppgtt->vm.top);
-err_free_scratch:
- free_scratch(&ppgtt->vm);
-err_free:
- kfree(ppgtt);
- return ERR_PTR(err);
-}
-
-/* Write pde (index) from the page directory @pd to the page table @pt */
-static inline void gen6_write_pde(const struct gen6_ppgtt *ppgtt,
- const unsigned int pde,
- const struct i915_page_table *pt)
-{
- /* Caller needs to make sure the write completes if necessary */
- iowrite32(GEN6_PDE_ADDR_ENCODE(px_dma(pt)) | GEN6_PDE_VALID,
- ppgtt->pd_addr + pde);
-}
-
-static void gen7_ppgtt_enable(struct intel_gt *gt)
-{
- struct drm_i915_private *i915 = gt->i915;
- struct intel_uncore *uncore = gt->uncore;
- struct intel_engine_cs *engine;
- enum intel_engine_id id;
- u32 ecochk;
-
- intel_uncore_rmw(uncore, GAC_ECO_BITS, 0, ECOBITS_PPGTT_CACHE64B);
-
- ecochk = intel_uncore_read(uncore, GAM_ECOCHK);
- if (IS_HASWELL(i915)) {
- ecochk |= ECOCHK_PPGTT_WB_HSW;
- } else {
- ecochk |= ECOCHK_PPGTT_LLC_IVB;
- ecochk &= ~ECOCHK_PPGTT_GFDT_IVB;
- }
- intel_uncore_write(uncore, GAM_ECOCHK, ecochk);
-
- for_each_engine(engine, gt, id) {
- /* GFX_MODE is per-ring on gen7+ */
- ENGINE_WRITE(engine,
- RING_MODE_GEN7,
- _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE));
- }
-}
-
-static void gen6_ppgtt_enable(struct intel_gt *gt)
-{
- struct intel_uncore *uncore = gt->uncore;
-
- intel_uncore_rmw(uncore,
- GAC_ECO_BITS,
- 0,
- ECOBITS_SNB_BIT | ECOBITS_PPGTT_CACHE64B);
-
- intel_uncore_rmw(uncore,
- GAB_CTL,
- 0,
- GAB_CTL_CONT_AFTER_PAGEFAULT);
-
- intel_uncore_rmw(uncore,
- GAM_ECOCHK,
- 0,
- ECOCHK_SNB_BIT | ECOCHK_PPGTT_CACHE64B);
-
- if (HAS_PPGTT(uncore->i915)) /* may be disabled for VT-d */
- intel_uncore_write(uncore,
- GFX_MODE,
- _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE));
-}
-
-/* PPGTT support for Sandybdrige/Gen6 and later */
-static void gen6_ppgtt_clear_range(struct i915_address_space *vm,
- u64 start, u64 length)
-{
- struct gen6_ppgtt * const ppgtt = to_gen6_ppgtt(i915_vm_to_ppgtt(vm));
- const unsigned int first_entry = start / I915_GTT_PAGE_SIZE;
- const gen6_pte_t scratch_pte = vm->scratch[0].encode;
- unsigned int pde = first_entry / GEN6_PTES;
- unsigned int pte = first_entry % GEN6_PTES;
- unsigned int num_entries = length / I915_GTT_PAGE_SIZE;
-
- while (num_entries) {
- struct i915_page_table * const pt =
- i915_pt_entry(ppgtt->base.pd, pde++);
- const unsigned int count = min(num_entries, GEN6_PTES - pte);
- gen6_pte_t *vaddr;
-
- GEM_BUG_ON(px_base(pt) == px_base(&vm->scratch[1]));
-
- num_entries -= count;
-
- GEM_BUG_ON(count > atomic_read(&pt->used));
- if (!atomic_sub_return(count, &pt->used))
- ppgtt->scan_for_unused_pt = true;
-
- /*
- * Note that the hw doesn't support removing PDE on the fly
- * (they are cached inside the context with no means to
- * invalidate the cache), so we can only reset the PTE
- * entries back to scratch.
- */
-
- vaddr = kmap_atomic_px(pt);
- memset32(vaddr + pte, scratch_pte, count);
- kunmap_atomic(vaddr);
-
- pte = 0;
- }
-}
-
-static void gen6_ppgtt_insert_entries(struct i915_address_space *vm,
- struct i915_vma *vma,
- enum i915_cache_level cache_level,
- u32 flags)
-{
- struct i915_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
- struct i915_page_directory * const pd = ppgtt->pd;
- unsigned first_entry = vma->node.start / I915_GTT_PAGE_SIZE;
- unsigned act_pt = first_entry / GEN6_PTES;
- unsigned act_pte = first_entry % GEN6_PTES;
- const u32 pte_encode = vm->pte_encode(0, cache_level, flags);
- struct sgt_dma iter = sgt_dma(vma);
- gen6_pte_t *vaddr;
-
- GEM_BUG_ON(pd->entry[act_pt] == &vm->scratch[1]);
-
- vaddr = kmap_atomic_px(i915_pt_entry(pd, act_pt));
- do {
- vaddr[act_pte] = pte_encode | GEN6_PTE_ADDR_ENCODE(iter.dma);
-
- iter.dma += I915_GTT_PAGE_SIZE;
- if (iter.dma == iter.max) {
- iter.sg = __sg_next(iter.sg);
- if (!iter.sg)
- break;
-
- iter.dma = sg_dma_address(iter.sg);
- iter.max = iter.dma + iter.sg->length;
- }
-
- if (++act_pte == GEN6_PTES) {
- kunmap_atomic(vaddr);
- vaddr = kmap_atomic_px(i915_pt_entry(pd, ++act_pt));
- act_pte = 0;
- }
- } while (1);
- kunmap_atomic(vaddr);
-
- vma->page_sizes.gtt = I915_GTT_PAGE_SIZE;
-}
-
-static void gen6_flush_pd(struct gen6_ppgtt *ppgtt, u64 start, u64 end)
-{
- struct i915_page_directory * const pd = ppgtt->base.pd;
- struct i915_page_table *pt;
- unsigned int pde;
-
- start = round_down(start, SZ_64K);
- end = round_up(end, SZ_64K) - start;
-
- mutex_lock(&ppgtt->flush);
-
- gen6_for_each_pde(pt, pd, start, end, pde)
- gen6_write_pde(ppgtt, pde, pt);
-
- mb();
- ioread32(ppgtt->pd_addr + pde - 1);
- gen6_ggtt_invalidate(ppgtt->base.vm.gt->ggtt);
- mb();
-
- mutex_unlock(&ppgtt->flush);
-}
-
-static int gen6_alloc_va_range(struct i915_address_space *vm,
- u64 start, u64 length)
-{
- struct gen6_ppgtt *ppgtt = to_gen6_ppgtt(i915_vm_to_ppgtt(vm));
- struct i915_page_directory * const pd = ppgtt->base.pd;
- struct i915_page_table *pt, *alloc = NULL;
- intel_wakeref_t wakeref;
- u64 from = start;
- unsigned int pde;
- int ret = 0;
-
- wakeref = intel_runtime_pm_get(&vm->i915->runtime_pm);
-
- spin_lock(&pd->lock);
- gen6_for_each_pde(pt, pd, start, length, pde) {
- const unsigned int count = gen6_pte_count(start, length);
-
- if (px_base(pt) == px_base(&vm->scratch[1])) {
- spin_unlock(&pd->lock);
-
- pt = fetch_and_zero(&alloc);
- if (!pt)
- pt = alloc_pt(vm);
- if (IS_ERR(pt)) {
- ret = PTR_ERR(pt);
- goto unwind_out;
- }
-
- fill32_px(pt, vm->scratch[0].encode);
-
- spin_lock(&pd->lock);
- if (pd->entry[pde] == &vm->scratch[1]) {
- pd->entry[pde] = pt;
- } else {
- alloc = pt;
- pt = pd->entry[pde];
- }
- }
-
- atomic_add(count, &pt->used);
- }
- spin_unlock(&pd->lock);
-
- if (i915_vma_is_bound(ppgtt->vma, I915_VMA_GLOBAL_BIND))
- gen6_flush_pd(ppgtt, from, start);
-
- goto out;
-
-unwind_out:
- gen6_ppgtt_clear_range(vm, from, start - from);
-out:
- if (alloc)
- free_px(vm, alloc);
- intel_runtime_pm_put(&vm->i915->runtime_pm, wakeref);
- return ret;
-}
-
-static int gen6_ppgtt_init_scratch(struct gen6_ppgtt *ppgtt)
-{
- struct i915_address_space * const vm = &ppgtt->base.vm;
- struct i915_page_directory * const pd = ppgtt->base.pd;
- int ret;
-
- ret = setup_scratch_page(vm, __GFP_HIGHMEM);
- if (ret)
- return ret;
-
- vm->scratch[0].encode =
- vm->pte_encode(px_dma(&vm->scratch[0]),
- I915_CACHE_NONE, PTE_READ_ONLY);
-
- if (unlikely(setup_page_dma(vm, px_base(&vm->scratch[1])))) {
- cleanup_scratch_page(vm);
- return -ENOMEM;
- }
-
- fill32_px(&vm->scratch[1], vm->scratch[0].encode);
- memset_p(pd->entry, &vm->scratch[1], I915_PDES);
-
- return 0;
-}
-
-static void gen6_ppgtt_free_pd(struct gen6_ppgtt *ppgtt)
-{
- struct i915_page_directory * const pd = ppgtt->base.pd;
- struct i915_page_dma * const scratch =
- px_base(&ppgtt->base.vm.scratch[1]);
- struct i915_page_table *pt;
- u32 pde;
-
- gen6_for_all_pdes(pt, pd, pde)
- if (px_base(pt) != scratch)
- free_px(&ppgtt->base.vm, pt);
-}
-
-static void gen6_ppgtt_cleanup(struct i915_address_space *vm)
-{
- struct gen6_ppgtt *ppgtt = to_gen6_ppgtt(i915_vm_to_ppgtt(vm));
-
- __i915_vma_put(ppgtt->vma);
-
- gen6_ppgtt_free_pd(ppgtt);
- free_scratch(vm);
-
- mutex_destroy(&ppgtt->flush);
- mutex_destroy(&ppgtt->pin_mutex);
- kfree(ppgtt->base.pd);
-}
-
-static int pd_vma_set_pages(struct i915_vma *vma)
-{
- vma->pages = ERR_PTR(-ENODEV);
- return 0;
-}
-
-static void pd_vma_clear_pages(struct i915_vma *vma)
-{
- GEM_BUG_ON(!vma->pages);
-
- vma->pages = NULL;
-}
-
-static int pd_vma_bind(struct i915_vma *vma,
- enum i915_cache_level cache_level,
- u32 unused)
-{
- struct i915_ggtt *ggtt = i915_vm_to_ggtt(vma->vm);
- struct gen6_ppgtt *ppgtt = vma->private;
- u32 ggtt_offset = i915_ggtt_offset(vma) / I915_GTT_PAGE_SIZE;
-
- px_base(ppgtt->base.pd)->ggtt_offset = ggtt_offset * sizeof(gen6_pte_t);
- ppgtt->pd_addr = (gen6_pte_t __iomem *)ggtt->gsm + ggtt_offset;
-
- gen6_flush_pd(ppgtt, 0, ppgtt->base.vm.total);
- return 0;
-}
-
-static void pd_vma_unbind(struct i915_vma *vma)
-{
- struct gen6_ppgtt *ppgtt = vma->private;
- struct i915_page_directory * const pd = ppgtt->base.pd;
- struct i915_page_dma * const scratch =
- px_base(&ppgtt->base.vm.scratch[1]);
- struct i915_page_table *pt;
- unsigned int pde;
-
- if (!ppgtt->scan_for_unused_pt)
- return;
-
- /* Free all no longer used page tables */
- gen6_for_all_pdes(pt, ppgtt->base.pd, pde) {
- if (px_base(pt) == scratch || atomic_read(&pt->used))
- continue;
-
- free_px(&ppgtt->base.vm, pt);
- pd->entry[pde] = scratch;
- }
-
- ppgtt->scan_for_unused_pt = false;
-}
-
-static const struct i915_vma_ops pd_vma_ops = {
- .set_pages = pd_vma_set_pages,
- .clear_pages = pd_vma_clear_pages,
- .bind_vma = pd_vma_bind,
- .unbind_vma = pd_vma_unbind,
-};
-
-static struct i915_vma *pd_vma_create(struct gen6_ppgtt *ppgtt, int size)
-{
- struct i915_ggtt *ggtt = ppgtt->base.vm.gt->ggtt;
- struct i915_vma *vma;
-
- GEM_BUG_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE));
- GEM_BUG_ON(size > ggtt->vm.total);
-
- vma = i915_vma_alloc();
- if (!vma)
- return ERR_PTR(-ENOMEM);
-
- i915_active_init(&vma->active, NULL, NULL);
-
- kref_init(&vma->ref);
- mutex_init(&vma->pages_mutex);
- vma->vm = i915_vm_get(&ggtt->vm);
- vma->ops = &pd_vma_ops;
- vma->private = ppgtt;
-
- vma->size = size;
- vma->fence_size = size;
- atomic_set(&vma->flags, I915_VMA_GGTT);
- vma->ggtt_view.type = I915_GGTT_VIEW_ROTATED; /* prevent fencing */
-
- INIT_LIST_HEAD(&vma->obj_link);
- INIT_LIST_HEAD(&vma->closed_link);
-
- return vma;
-}
-
-int gen6_ppgtt_pin(struct i915_ppgtt *base)
-{
- struct gen6_ppgtt *ppgtt = to_gen6_ppgtt(base);
- int err = 0;
-
- GEM_BUG_ON(!atomic_read(&ppgtt->base.vm.open));
-
- /*
- * Workaround the limited maximum vma->pin_count and the aliasing_ppgtt
- * which will be pinned into every active context.
- * (When vma->pin_count becomes atomic, I expect we will naturally
- * need a larger, unpacked, type and kill this redundancy.)
- */
- if (atomic_add_unless(&ppgtt->pin_count, 1, 0))
- return 0;
-
- if (mutex_lock_interruptible(&ppgtt->pin_mutex))
- return -EINTR;
-
- /*
- * PPGTT PDEs reside in the GGTT and consists of 512 entries. The
- * allocator works in address space sizes, so it's multiplied by page
- * size. We allocate at the top of the GTT to avoid fragmentation.
- */
- if (!atomic_read(&ppgtt->pin_count)) {
- err = i915_ggtt_pin(ppgtt->vma, GEN6_PD_ALIGN, PIN_HIGH);
- }
- if (!err)
- atomic_inc(&ppgtt->pin_count);
- mutex_unlock(&ppgtt->pin_mutex);
-
- return err;
-}
-
-void gen6_ppgtt_unpin(struct i915_ppgtt *base)
-{
- struct gen6_ppgtt *ppgtt = to_gen6_ppgtt(base);
-
- GEM_BUG_ON(!atomic_read(&ppgtt->pin_count));
- if (atomic_dec_and_test(&ppgtt->pin_count))
- i915_vma_unpin(ppgtt->vma);
-}
-
-void gen6_ppgtt_unpin_all(struct i915_ppgtt *base)
-{
- struct gen6_ppgtt *ppgtt = to_gen6_ppgtt(base);
-
- if (!atomic_read(&ppgtt->pin_count))
- return;
-
- i915_vma_unpin(ppgtt->vma);
- atomic_set(&ppgtt->pin_count, 0);
-}
-
-static struct i915_ppgtt *gen6_ppgtt_create(struct drm_i915_private *i915)
-{
- struct i915_ggtt * const ggtt = &i915->ggtt;
- struct gen6_ppgtt *ppgtt;
- int err;
-
- ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL);
- if (!ppgtt)
- return ERR_PTR(-ENOMEM);
-
- mutex_init(&ppgtt->flush);
- mutex_init(&ppgtt->pin_mutex);
-
- ppgtt_init(&ppgtt->base, &i915->gt);
- ppgtt->base.vm.top = 1;
-
- ppgtt->base.vm.bind_async_flags = I915_VMA_LOCAL_BIND;
- ppgtt->base.vm.allocate_va_range = gen6_alloc_va_range;
- ppgtt->base.vm.clear_range = gen6_ppgtt_clear_range;
- ppgtt->base.vm.insert_entries = gen6_ppgtt_insert_entries;
- ppgtt->base.vm.cleanup = gen6_ppgtt_cleanup;
-
- ppgtt->base.vm.pte_encode = ggtt->vm.pte_encode;
-
- ppgtt->base.pd = __alloc_pd(sizeof(*ppgtt->base.pd));
- if (!ppgtt->base.pd) {
- err = -ENOMEM;
- goto err_free;
- }
-
- err = gen6_ppgtt_init_scratch(ppgtt);
- if (err)
- goto err_pd;
-
- ppgtt->vma = pd_vma_create(ppgtt, GEN6_PD_SIZE);
- if (IS_ERR(ppgtt->vma)) {
- err = PTR_ERR(ppgtt->vma);
- goto err_scratch;
- }
-
- return &ppgtt->base;
-
-err_scratch:
- free_scratch(&ppgtt->base.vm);
-err_pd:
- kfree(ppgtt->base.pd);
-err_free:
- mutex_destroy(&ppgtt->pin_mutex);
- kfree(ppgtt);
- return ERR_PTR(err);
-}
-
-static void gtt_write_workarounds(struct intel_gt *gt)
-{
- struct drm_i915_private *i915 = gt->i915;
- struct intel_uncore *uncore = gt->uncore;
-
- /* This function is for gtt related workarounds. This function is
- * called on driver load and after a GPU reset, so you can place
- * workarounds here even if they get overwritten by GPU reset.
- */
- /* WaIncreaseDefaultTLBEntries:chv,bdw,skl,bxt,kbl,glk,cfl,cnl,icl */
- if (IS_BROADWELL(i915))
- intel_uncore_write(uncore,
- GEN8_L3_LRA_1_GPGPU,
- GEN8_L3_LRA_1_GPGPU_DEFAULT_VALUE_BDW);
- else if (IS_CHERRYVIEW(i915))
- intel_uncore_write(uncore,
- GEN8_L3_LRA_1_GPGPU,
- GEN8_L3_LRA_1_GPGPU_DEFAULT_VALUE_CHV);
- else if (IS_GEN9_LP(i915))
- intel_uncore_write(uncore,
- GEN8_L3_LRA_1_GPGPU,
- GEN9_L3_LRA_1_GPGPU_DEFAULT_VALUE_BXT);
- else if (INTEL_GEN(i915) >= 9 && INTEL_GEN(i915) <= 11)
- intel_uncore_write(uncore,
- GEN8_L3_LRA_1_GPGPU,
- GEN9_L3_LRA_1_GPGPU_DEFAULT_VALUE_SKL);
-
- /*
- * To support 64K PTEs we need to first enable the use of the
- * Intermediate-Page-Size(IPS) bit of the PDE field via some magical
- * mmio, otherwise the page-walker will simply ignore the IPS bit. This
- * shouldn't be needed after GEN10.
- *
- * 64K pages were first introduced from BDW+, although technically they
- * only *work* from gen9+. For pre-BDW we instead have the option for
- * 32K pages, but we don't currently have any support for it in our
- * driver.
- */
- if (HAS_PAGE_SIZES(i915, I915_GTT_PAGE_SIZE_64K) &&
- INTEL_GEN(i915) <= 10)
- intel_uncore_rmw(uncore,
- GEN8_GAMW_ECO_DEV_RW_IA,
- 0,
- GAMW_ECO_ENABLE_64K_IPS_FIELD);
-
- if (IS_GEN_RANGE(i915, 8, 11)) {
- bool can_use_gtt_cache = true;
-
- /*
- * According to the BSpec if we use 2M/1G pages then we also
- * need to disable the GTT cache. At least on BDW we can see
- * visual corruption when using 2M pages, and not disabling the
- * GTT cache.
- */
- if (HAS_PAGE_SIZES(i915, I915_GTT_PAGE_SIZE_2M))
- can_use_gtt_cache = false;
-
- /* WaGttCachingOffByDefault */
- intel_uncore_write(uncore,
- HSW_GTT_CACHE_EN,
- can_use_gtt_cache ? GTT_CACHE_EN_ALL : 0);
- WARN_ON_ONCE(can_use_gtt_cache &&
- intel_uncore_read(uncore,
- HSW_GTT_CACHE_EN) == 0);
- }
-}
-
-int i915_ppgtt_init_hw(struct intel_gt *gt)
-{
- struct drm_i915_private *i915 = gt->i915;
-
- gtt_write_workarounds(gt);
-
- if (IS_GEN(i915, 6))
- gen6_ppgtt_enable(gt);
- else if (IS_GEN(i915, 7))
- gen7_ppgtt_enable(gt);
-
- return 0;
-}
-
-static struct i915_ppgtt *
-__ppgtt_create(struct drm_i915_private *i915)
-{
- if (INTEL_GEN(i915) < 8)
- return gen6_ppgtt_create(i915);
- else
- return gen8_ppgtt_create(i915);
-}
-
-struct i915_ppgtt *
-i915_ppgtt_create(struct drm_i915_private *i915)
-{
- struct i915_ppgtt *ppgtt;
-
- ppgtt = __ppgtt_create(i915);
- if (IS_ERR(ppgtt))
- return ppgtt;
-
- trace_i915_ppgtt_create(&ppgtt->vm);
-
- return ppgtt;
-}
-
-/* Certain Gen5 chipsets require require idling the GPU before
- * unmapping anything from the GTT when VT-d is enabled.
- */
-static bool needs_idle_maps(struct drm_i915_private *dev_priv)
-{
- /* Query intel_iommu to see if we need the workaround. Presumably that
- * was loaded first.
- */
- return IS_GEN(dev_priv, 5) && IS_MOBILE(dev_priv) && intel_vtd_active();
-}
-
-static void ggtt_suspend_mappings(struct i915_ggtt *ggtt)
-{
- struct drm_i915_private *i915 = ggtt->vm.i915;
-
- /* Don't bother messing with faults pre GEN6 as we have little
- * documentation supporting that it's a good idea.
- */
- if (INTEL_GEN(i915) < 6)
- return;
-
- intel_gt_check_and_clear_faults(ggtt->vm.gt);
-
- ggtt->vm.clear_range(&ggtt->vm, 0, ggtt->vm.total);
-
- ggtt->invalidate(ggtt);
-}
-
-void i915_gem_suspend_gtt_mappings(struct drm_i915_private *i915)
-{
- ggtt_suspend_mappings(&i915->ggtt);
-}
-
-int i915_gem_gtt_prepare_pages(struct drm_i915_gem_object *obj,
- struct sg_table *pages)
-{
- do {
- if (dma_map_sg_attrs(&obj->base.dev->pdev->dev,
- pages->sgl, pages->nents,
- PCI_DMA_BIDIRECTIONAL,
- DMA_ATTR_NO_WARN))
- return 0;
-
- /*
- * If the DMA remap fails, one cause can be that we have
- * too many objects pinned in a small remapping table,
- * such as swiotlb. Incrementally purge all other objects and
- * try again - if there are no more pages to remove from
- * the DMA remapper, i915_gem_shrink will return 0.
- */
- GEM_BUG_ON(obj->mm.pages == pages);
- } while (i915_gem_shrink(to_i915(obj->base.dev),
- obj->base.size >> PAGE_SHIFT, NULL,
- I915_SHRINK_BOUND |
- I915_SHRINK_UNBOUND));
-
- return -ENOSPC;
-}
-
-static void gen8_set_pte(void __iomem *addr, gen8_pte_t pte)
-{
- writeq(pte, addr);
-}
-
-static void gen8_ggtt_insert_page(struct i915_address_space *vm,
- dma_addr_t addr,
- u64 offset,
- enum i915_cache_level level,
- u32 unused)
-{
- struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
- gen8_pte_t __iomem *pte =
- (gen8_pte_t __iomem *)ggtt->gsm + offset / I915_GTT_PAGE_SIZE;
-
- gen8_set_pte(pte, gen8_pte_encode(addr, level, 0));
-
- ggtt->invalidate(ggtt);
-}
-
-static void gen8_ggtt_insert_entries(struct i915_address_space *vm,
- struct i915_vma *vma,
- enum i915_cache_level level,
- u32 flags)
-{
- struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
- struct sgt_iter sgt_iter;
- gen8_pte_t __iomem *gtt_entries;
- const gen8_pte_t pte_encode = gen8_pte_encode(0, level, 0);
- dma_addr_t addr;
-
- /*
- * Note that we ignore PTE_READ_ONLY here. The caller must be careful
- * not to allow the user to override access to a read only page.
- */
-
- gtt_entries = (gen8_pte_t __iomem *)ggtt->gsm;
- gtt_entries += vma->node.start / I915_GTT_PAGE_SIZE;
- for_each_sgt_daddr(addr, sgt_iter, vma->pages)
- gen8_set_pte(gtt_entries++, pte_encode | addr);
-
- /*
- * We want to flush the TLBs only after we're certain all the PTE
- * updates have finished.
- */
- ggtt->invalidate(ggtt);
-}
-
-static void gen6_ggtt_insert_page(struct i915_address_space *vm,
- dma_addr_t addr,
- u64 offset,
- enum i915_cache_level level,
- u32 flags)
-{
- struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
- gen6_pte_t __iomem *pte =
- (gen6_pte_t __iomem *)ggtt->gsm + offset / I915_GTT_PAGE_SIZE;
-
- iowrite32(vm->pte_encode(addr, level, flags), pte);
-
- ggtt->invalidate(ggtt);
-}
-
-/*
- * Binds an object into the global gtt with the specified cache level. The object
- * will be accessible to the GPU via commands whose operands reference offsets
- * within the global GTT as well as accessible by the GPU through the GMADR
- * mapped BAR (dev_priv->mm.gtt->gtt).
- */
-static void gen6_ggtt_insert_entries(struct i915_address_space *vm,
- struct i915_vma *vma,
- enum i915_cache_level level,
- u32 flags)
-{
- struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
- gen6_pte_t __iomem *entries = (gen6_pte_t __iomem *)ggtt->gsm;
- unsigned int i = vma->node.start / I915_GTT_PAGE_SIZE;
- struct sgt_iter iter;
- dma_addr_t addr;
- for_each_sgt_daddr(addr, iter, vma->pages)
- iowrite32(vm->pte_encode(addr, level, flags), &entries[i++]);
-
- /*
- * We want to flush the TLBs only after we're certain all the PTE
- * updates have finished.
- */
- ggtt->invalidate(ggtt);
-}
-
-static void nop_clear_range(struct i915_address_space *vm,
- u64 start, u64 length)
-{
-}
-
-static void gen8_ggtt_clear_range(struct i915_address_space *vm,
- u64 start, u64 length)
-{
- struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
- unsigned first_entry = start / I915_GTT_PAGE_SIZE;
- unsigned num_entries = length / I915_GTT_PAGE_SIZE;
- const gen8_pte_t scratch_pte = vm->scratch[0].encode;
- gen8_pte_t __iomem *gtt_base =
- (gen8_pte_t __iomem *)ggtt->gsm + first_entry;
- const int max_entries = ggtt_total_entries(ggtt) - first_entry;
- int i;
-
- if (WARN(num_entries > max_entries,
- "First entry = %d; Num entries = %d (max=%d)\n",
- first_entry, num_entries, max_entries))
- num_entries = max_entries;
-
- for (i = 0; i < num_entries; i++)
- gen8_set_pte(>t_base[i], scratch_pte);
-}
-
-static void bxt_vtd_ggtt_wa(struct i915_address_space *vm)
-{
- struct drm_i915_private *dev_priv = vm->i915;
-
- /*
- * Make sure the internal GAM fifo has been cleared of all GTT
- * writes before exiting stop_machine(). This guarantees that
- * any aperture accesses waiting to start in another process
- * cannot back up behind the GTT writes causing a hang.
- * The register can be any arbitrary GAM register.
- */
- POSTING_READ(GFX_FLSH_CNTL_GEN6);
-}
-
-struct insert_page {
- struct i915_address_space *vm;
- dma_addr_t addr;
- u64 offset;
- enum i915_cache_level level;
-};
-
-static int bxt_vtd_ggtt_insert_page__cb(void *_arg)
-{
- struct insert_page *arg = _arg;
-
- gen8_ggtt_insert_page(arg->vm, arg->addr, arg->offset, arg->level, 0);
- bxt_vtd_ggtt_wa(arg->vm);
-
- return 0;
-}
-
-static void bxt_vtd_ggtt_insert_page__BKL(struct i915_address_space *vm,
- dma_addr_t addr,
- u64 offset,
- enum i915_cache_level level,
- u32 unused)
-{
- struct insert_page arg = { vm, addr, offset, level };
-
- stop_machine(bxt_vtd_ggtt_insert_page__cb, &arg, NULL);
-}
-
-struct insert_entries {
- struct i915_address_space *vm;
- struct i915_vma *vma;
- enum i915_cache_level level;
- u32 flags;
-};
-
-static int bxt_vtd_ggtt_insert_entries__cb(void *_arg)
-{
- struct insert_entries *arg = _arg;
-
- gen8_ggtt_insert_entries(arg->vm, arg->vma, arg->level, arg->flags);
- bxt_vtd_ggtt_wa(arg->vm);
-
- return 0;
-}
-
-static void bxt_vtd_ggtt_insert_entries__BKL(struct i915_address_space *vm,
- struct i915_vma *vma,
- enum i915_cache_level level,
- u32 flags)
-{
- struct insert_entries arg = { vm, vma, level, flags };
-
- stop_machine(bxt_vtd_ggtt_insert_entries__cb, &arg, NULL);
-}
-
-struct clear_range {
- struct i915_address_space *vm;
- u64 start;
- u64 length;
-};
-
-static int bxt_vtd_ggtt_clear_range__cb(void *_arg)
-{
- struct clear_range *arg = _arg;
-
- gen8_ggtt_clear_range(arg->vm, arg->start, arg->length);
- bxt_vtd_ggtt_wa(arg->vm);
-
- return 0;
-}
-
-static void bxt_vtd_ggtt_clear_range__BKL(struct i915_address_space *vm,
- u64 start,
- u64 length)
-{
- struct clear_range arg = { vm, start, length };
-
- stop_machine(bxt_vtd_ggtt_clear_range__cb, &arg, NULL);
-}
-
-static void gen6_ggtt_clear_range(struct i915_address_space *vm,
- u64 start, u64 length)
-{
- struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
- unsigned first_entry = start / I915_GTT_PAGE_SIZE;
- unsigned num_entries = length / I915_GTT_PAGE_SIZE;
- gen6_pte_t scratch_pte, __iomem *gtt_base =
- (gen6_pte_t __iomem *)ggtt->gsm + first_entry;
- const int max_entries = ggtt_total_entries(ggtt) - first_entry;
- int i;
-
- if (WARN(num_entries > max_entries,
- "First entry = %d; Num entries = %d (max=%d)\n",
- first_entry, num_entries, max_entries))
- num_entries = max_entries;
-
- scratch_pte = vm->scratch[0].encode;
- for (i = 0; i < num_entries; i++)
- iowrite32(scratch_pte, >t_base[i]);
-}
-
-static void i915_ggtt_insert_page(struct i915_address_space *vm,
- dma_addr_t addr,
- u64 offset,
- enum i915_cache_level cache_level,
- u32 unused)
-{
- unsigned int flags = (cache_level == I915_CACHE_NONE) ?
- AGP_USER_MEMORY : AGP_USER_CACHED_MEMORY;
-
- intel_gtt_insert_page(addr, offset >> PAGE_SHIFT, flags);
-}
-
-static void i915_ggtt_insert_entries(struct i915_address_space *vm,
- struct i915_vma *vma,
- enum i915_cache_level cache_level,
- u32 unused)
-{
- unsigned int flags = (cache_level == I915_CACHE_NONE) ?
- AGP_USER_MEMORY : AGP_USER_CACHED_MEMORY;
-
- intel_gtt_insert_sg_entries(vma->pages, vma->node.start >> PAGE_SHIFT,
- flags);
-}
-
-static void i915_ggtt_clear_range(struct i915_address_space *vm,
- u64 start, u64 length)
-{
- intel_gtt_clear_range(start >> PAGE_SHIFT, length >> PAGE_SHIFT);
-}
-
-static int ggtt_bind_vma(struct i915_vma *vma,
- enum i915_cache_level cache_level,
- u32 flags)
-{
- struct drm_i915_private *i915 = vma->vm->i915;
- struct drm_i915_gem_object *obj = vma->obj;
- intel_wakeref_t wakeref;
- u32 pte_flags;
-
- /* Applicable to VLV (gen8+ do not support RO in the GGTT) */
- pte_flags = 0;
- if (i915_gem_object_is_readonly(obj))
- pte_flags |= PTE_READ_ONLY;
-
- with_intel_runtime_pm(&i915->runtime_pm, wakeref)
- vma->vm->insert_entries(vma->vm, vma, cache_level, pte_flags);
-
- vma->page_sizes.gtt = I915_GTT_PAGE_SIZE;
-
- /*
- * Without aliasing PPGTT there's no difference between
- * GLOBAL/LOCAL_BIND, it's all the same ptes. Hence unconditionally
- * upgrade to both bound if we bind either to avoid double-binding.
- */
- atomic_or(I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND, &vma->flags);
-
- return 0;
-}
-
-static void ggtt_unbind_vma(struct i915_vma *vma)
-{
- struct drm_i915_private *i915 = vma->vm->i915;
- intel_wakeref_t wakeref;
-
- with_intel_runtime_pm(&i915->runtime_pm, wakeref)
- vma->vm->clear_range(vma->vm, vma->node.start, vma->size);
-}
-
-static int aliasing_gtt_bind_vma(struct i915_vma *vma,
- enum i915_cache_level cache_level,
- u32 flags)
-{
- struct drm_i915_private *i915 = vma->vm->i915;
- u32 pte_flags;
- int ret;
-
- /* Currently applicable only to VLV */
- pte_flags = 0;
- if (i915_gem_object_is_readonly(vma->obj))
- pte_flags |= PTE_READ_ONLY;
-
- if (flags & I915_VMA_LOCAL_BIND) {
- struct i915_ppgtt *alias = i915_vm_to_ggtt(vma->vm)->alias;
-
- if (flags & I915_VMA_ALLOC) {
- ret = alias->vm.allocate_va_range(&alias->vm,
- vma->node.start,
- vma->size);
- if (ret)
- return ret;
-
- set_bit(I915_VMA_ALLOC_BIT, __i915_vma_flags(vma));
- }
-
- GEM_BUG_ON(!test_bit(I915_VMA_ALLOC_BIT,
- __i915_vma_flags(vma)));
- alias->vm.insert_entries(&alias->vm, vma,
- cache_level, pte_flags);
- }
-
- if (flags & I915_VMA_GLOBAL_BIND) {
- intel_wakeref_t wakeref;
-
- with_intel_runtime_pm(&i915->runtime_pm, wakeref) {
- vma->vm->insert_entries(vma->vm, vma,
- cache_level, pte_flags);
- }
- }
-
- return 0;
-}
-
-static void aliasing_gtt_unbind_vma(struct i915_vma *vma)
-{
- struct drm_i915_private *i915 = vma->vm->i915;
-
- if (i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND)) {
- struct i915_address_space *vm = vma->vm;
- intel_wakeref_t wakeref;
-
- with_intel_runtime_pm(&i915->runtime_pm, wakeref)
- vm->clear_range(vm, vma->node.start, vma->size);
- }
-
- if (test_and_clear_bit(I915_VMA_ALLOC_BIT, __i915_vma_flags(vma))) {
- struct i915_address_space *vm =
- &i915_vm_to_ggtt(vma->vm)->alias->vm;
-
- vm->clear_range(vm, vma->node.start, vma->size);
- }
-}
-
-void i915_gem_gtt_finish_pages(struct drm_i915_gem_object *obj,
- struct sg_table *pages)
-{
- struct drm_i915_private *dev_priv = to_i915(obj->base.dev);
- struct device *kdev = &dev_priv->drm.pdev->dev;
- struct i915_ggtt *ggtt = &dev_priv->ggtt;
-
- if (unlikely(ggtt->do_idle_maps)) {
- /* XXX This does not prevent more requests being submitted! */
- if (intel_gt_retire_requests_timeout(ggtt->vm.gt,
- -MAX_SCHEDULE_TIMEOUT)) {
- DRM_ERROR("Failed to wait for idle; VT'd may hang.\n");
- /* Wait a bit, in hopes it avoids the hang */
- udelay(10);
- }
- }
-
- dma_unmap_sg(kdev, pages->sgl, pages->nents, PCI_DMA_BIDIRECTIONAL);
-}
-
-static int ggtt_set_pages(struct i915_vma *vma)
-{
- int ret;
-
- GEM_BUG_ON(vma->pages);
-
- ret = i915_get_ggtt_vma_pages(vma);
- if (ret)
- return ret;
-
- vma->page_sizes = vma->obj->mm.page_sizes;
-
- return 0;
-}
-
-static void i915_ggtt_color_adjust(const struct drm_mm_node *node,
- unsigned long color,
- u64 *start,
- u64 *end)
-{
- if (i915_node_color_differs(node, color))
- *start += I915_GTT_PAGE_SIZE;
-
- /* Also leave a space between the unallocated reserved node after the
- * GTT and any objects within the GTT, i.e. we use the color adjustment
- * to insert a guard page to prevent prefetches crossing over the
- * GTT boundary.
- */
- node = list_next_entry(node, node_list);
- if (node->color != color)
- *end -= I915_GTT_PAGE_SIZE;
-}
-
-static int init_aliasing_ppgtt(struct i915_ggtt *ggtt)
-{
- struct i915_ppgtt *ppgtt;
- int err;
-
- ppgtt = i915_ppgtt_create(ggtt->vm.i915);
- if (IS_ERR(ppgtt))
- return PTR_ERR(ppgtt);
-
- if (GEM_WARN_ON(ppgtt->vm.total < ggtt->vm.total)) {
- err = -ENODEV;
- goto err_ppgtt;
- }
-
- /*
- * Note we only pre-allocate as far as the end of the global
- * GTT. On 48b / 4-level page-tables, the difference is very,
- * very significant! We have to preallocate as GVT/vgpu does
- * not like the page directory disappearing.
- */
- err = ppgtt->vm.allocate_va_range(&ppgtt->vm, 0, ggtt->vm.total);
- if (err)
- goto err_ppgtt;
-
- ggtt->alias = ppgtt;
- ggtt->vm.bind_async_flags |= ppgtt->vm.bind_async_flags;
-
- GEM_BUG_ON(ggtt->vm.vma_ops.bind_vma != ggtt_bind_vma);
- ggtt->vm.vma_ops.bind_vma = aliasing_gtt_bind_vma;
-
- GEM_BUG_ON(ggtt->vm.vma_ops.unbind_vma != ggtt_unbind_vma);
- ggtt->vm.vma_ops.unbind_vma = aliasing_gtt_unbind_vma;
-
- return 0;
-
-err_ppgtt:
- i915_vm_put(&ppgtt->vm);
- return err;
-}
-
-static void fini_aliasing_ppgtt(struct i915_ggtt *ggtt)
-{
- struct i915_ppgtt *ppgtt;
-
- ppgtt = fetch_and_zero(&ggtt->alias);
- if (!ppgtt)
- return;
-
- i915_vm_put(&ppgtt->vm);
-
- ggtt->vm.vma_ops.bind_vma = ggtt_bind_vma;
- ggtt->vm.vma_ops.unbind_vma = ggtt_unbind_vma;
-}
-
-static int ggtt_reserve_guc_top(struct i915_ggtt *ggtt)
-{
- u64 size;
- int ret;
-
- if (!USES_GUC(ggtt->vm.i915))
- return 0;
-
- GEM_BUG_ON(ggtt->vm.total <= GUC_GGTT_TOP);
- size = ggtt->vm.total - GUC_GGTT_TOP;
-
- ret = i915_gem_gtt_reserve(&ggtt->vm, &ggtt->uc_fw, size,
- GUC_GGTT_TOP, I915_COLOR_UNEVICTABLE,
- PIN_NOEVICT);
- if (ret)
- DRM_DEBUG_DRIVER("Failed to reserve top of GGTT for GuC\n");
-
- return ret;
-}
-
-static void ggtt_release_guc_top(struct i915_ggtt *ggtt)
-{
- if (drm_mm_node_allocated(&ggtt->uc_fw))
- drm_mm_remove_node(&ggtt->uc_fw);
-}
-
-static void cleanup_init_ggtt(struct i915_ggtt *ggtt)
-{
- ggtt_release_guc_top(ggtt);
- if (drm_mm_node_allocated(&ggtt->error_capture))
- drm_mm_remove_node(&ggtt->error_capture);
-}
-
-static int init_ggtt(struct i915_ggtt *ggtt)
-{
- /* Let GEM Manage all of the aperture.
- *
- * However, leave one page at the end still bound to the scratch page.
- * There are a number of places where the hardware apparently prefetches
- * past the end of the object, and we've seen multiple hangs with the
- * GPU head pointer stuck in a batchbuffer bound at the last page of the
- * aperture. One page should be enough to keep any prefetching inside
- * of the aperture.
- */
- unsigned long hole_start, hole_end;
- struct drm_mm_node *entry;
- int ret;
-
- /*
- * GuC requires all resources that we're sharing with it to be placed in
- * non-WOPCM memory. If GuC is not present or not in use we still need a
- * small bias as ring wraparound at offset 0 sometimes hangs. No idea
- * why.
- */
- ggtt->pin_bias = max_t(u32, I915_GTT_PAGE_SIZE,
- intel_wopcm_guc_size(&ggtt->vm.i915->wopcm));
-
- ret = intel_vgt_balloon(ggtt);
- if (ret)
- return ret;
-
- if (ggtt->mappable_end) {
- /* Reserve a mappable slot for our lockless error capture */
- ret = drm_mm_insert_node_in_range(&ggtt->vm.mm, &ggtt->error_capture,
- PAGE_SIZE, 0, I915_COLOR_UNEVICTABLE,
- 0, ggtt->mappable_end,
- DRM_MM_INSERT_LOW);
- if (ret)
- return ret;
- }
-
- /*
- * The upper portion of the GuC address space has a sizeable hole
- * (several MB) that is inaccessible by GuC. Reserve this range within
- * GGTT as it can comfortably hold GuC/HuC firmware images.
- */
- ret = ggtt_reserve_guc_top(ggtt);
- if (ret)
- goto err;
-
- /* Clear any non-preallocated blocks */
- drm_mm_for_each_hole(entry, &ggtt->vm.mm, hole_start, hole_end) {
- DRM_DEBUG_KMS("clearing unused GTT space: [%lx, %lx]\n",
- hole_start, hole_end);
- ggtt->vm.clear_range(&ggtt->vm, hole_start,
- hole_end - hole_start);
- }
-
- /* And finally clear the reserved guard page */
- ggtt->vm.clear_range(&ggtt->vm, ggtt->vm.total - PAGE_SIZE, PAGE_SIZE);
-
- return 0;
-
-err:
- cleanup_init_ggtt(ggtt);
- return ret;
-}
-
-int i915_init_ggtt(struct drm_i915_private *i915)
-{
- int ret;
-
- ret = init_ggtt(&i915->ggtt);
- if (ret)
- return ret;
-
- if (INTEL_PPGTT(i915) == INTEL_PPGTT_ALIASING) {
- ret = init_aliasing_ppgtt(&i915->ggtt);
- if (ret)
- cleanup_init_ggtt(&i915->ggtt);
- }
-
- return 0;
-}
-
-static void ggtt_cleanup_hw(struct i915_ggtt *ggtt)
-{
- struct i915_vma *vma, *vn;
-
- atomic_set(&ggtt->vm.open, 0);
-
- rcu_barrier(); /* flush the RCU'ed__i915_vm_release */
- flush_workqueue(ggtt->vm.i915->wq);
-
- mutex_lock(&ggtt->vm.mutex);
-
- list_for_each_entry_safe(vma, vn, &ggtt->vm.bound_list, vm_link)
- WARN_ON(__i915_vma_unbind(vma));
-
- if (drm_mm_node_allocated(&ggtt->error_capture))
- drm_mm_remove_node(&ggtt->error_capture);
-
- ggtt_release_guc_top(ggtt);
- intel_vgt_deballoon(ggtt);
-
- ggtt->vm.cleanup(&ggtt->vm);
-
- mutex_unlock(&ggtt->vm.mutex);
- i915_address_space_fini(&ggtt->vm);
-
- arch_phys_wc_del(ggtt->mtrr);
-
- if (ggtt->iomap.size)
- io_mapping_fini(&ggtt->iomap);
-}
-
-/**
- * i915_ggtt_driver_release - Clean up GGTT hardware initialization
- * @i915: i915 device
- */
-void i915_ggtt_driver_release(struct drm_i915_private *i915)
-{
- struct pagevec *pvec;
-
- fini_aliasing_ppgtt(&i915->ggtt);
-
- ggtt_cleanup_hw(&i915->ggtt);
-
- pvec = &i915->mm.wc_stash.pvec;
- if (pvec->nr) {
- set_pages_array_wb(pvec->pages, pvec->nr);
- __pagevec_release(pvec);
- }
-}
-
-static unsigned int gen6_get_total_gtt_size(u16 snb_gmch_ctl)
-{
- snb_gmch_ctl >>= SNB_GMCH_GGMS_SHIFT;
- snb_gmch_ctl &= SNB_GMCH_GGMS_MASK;
- return snb_gmch_ctl << 20;
-}
-
-static unsigned int gen8_get_total_gtt_size(u16 bdw_gmch_ctl)
-{
- bdw_gmch_ctl >>= BDW_GMCH_GGMS_SHIFT;
- bdw_gmch_ctl &= BDW_GMCH_GGMS_MASK;
- if (bdw_gmch_ctl)
- bdw_gmch_ctl = 1 << bdw_gmch_ctl;
-
-#ifdef CONFIG_X86_32
- /* Limit 32b platforms to a 2GB GGTT: 4 << 20 / pte size * I915_GTT_PAGE_SIZE */
- if (bdw_gmch_ctl > 4)
- bdw_gmch_ctl = 4;
-#endif
-
- return bdw_gmch_ctl << 20;
-}
-
-static unsigned int chv_get_total_gtt_size(u16 gmch_ctrl)
-{
- gmch_ctrl >>= SNB_GMCH_GGMS_SHIFT;
- gmch_ctrl &= SNB_GMCH_GGMS_MASK;
-
- if (gmch_ctrl)
- return 1 << (20 + gmch_ctrl);
-
- return 0;
-}
-
-static int ggtt_probe_common(struct i915_ggtt *ggtt, u64 size)
-{
- struct drm_i915_private *dev_priv = ggtt->vm.i915;
- struct pci_dev *pdev = dev_priv->drm.pdev;
- phys_addr_t phys_addr;
- int ret;
-
- /* For Modern GENs the PTEs and register space are split in the BAR */
- phys_addr = pci_resource_start(pdev, 0) + pci_resource_len(pdev, 0) / 2;
-
- /*
- * On BXT+/CNL+ writes larger than 64 bit to the GTT pagetable range
- * will be dropped. For WC mappings in general we have 64 byte burst
- * writes when the WC buffer is flushed, so we can't use it, but have to
- * resort to an uncached mapping. The WC issue is easily caught by the
- * readback check when writing GTT PTE entries.
- */
- if (IS_GEN9_LP(dev_priv) || INTEL_GEN(dev_priv) >= 10)
- ggtt->gsm = ioremap_nocache(phys_addr, size);
- else
- ggtt->gsm = ioremap_wc(phys_addr, size);
- if (!ggtt->gsm) {
- DRM_ERROR("Failed to map the ggtt page table\n");
- return -ENOMEM;
- }
-
- ret = setup_scratch_page(&ggtt->vm, GFP_DMA32);
- if (ret) {
- DRM_ERROR("Scratch setup failed\n");
- /* iounmap will also get called at remove, but meh */
- iounmap(ggtt->gsm);
- return ret;
- }
-
- ggtt->vm.scratch[0].encode =
- ggtt->vm.pte_encode(px_dma(&ggtt->vm.scratch[0]),
- I915_CACHE_NONE, 0);
-
- return 0;
-}
-
-static void tgl_setup_private_ppat(struct intel_uncore *uncore)
-{
- /* TGL doesn't support LLC or AGE settings */
- intel_uncore_write(uncore, GEN12_PAT_INDEX(0), GEN8_PPAT_WB);
- intel_uncore_write(uncore, GEN12_PAT_INDEX(1), GEN8_PPAT_WC);
- intel_uncore_write(uncore, GEN12_PAT_INDEX(2), GEN8_PPAT_WT);
- intel_uncore_write(uncore, GEN12_PAT_INDEX(3), GEN8_PPAT_UC);
- intel_uncore_write(uncore, GEN12_PAT_INDEX(4), GEN8_PPAT_WB);
- intel_uncore_write(uncore, GEN12_PAT_INDEX(5), GEN8_PPAT_WB);
- intel_uncore_write(uncore, GEN12_PAT_INDEX(6), GEN8_PPAT_WB);
- intel_uncore_write(uncore, GEN12_PAT_INDEX(7), GEN8_PPAT_WB);
-}
-
-static void cnl_setup_private_ppat(struct intel_uncore *uncore)
-{
- intel_uncore_write(uncore,
- GEN10_PAT_INDEX(0),
- GEN8_PPAT_WB | GEN8_PPAT_LLC);
- intel_uncore_write(uncore,
- GEN10_PAT_INDEX(1),
- GEN8_PPAT_WC | GEN8_PPAT_LLCELLC);
- intel_uncore_write(uncore,
- GEN10_PAT_INDEX(2),
- GEN8_PPAT_WT | GEN8_PPAT_LLCELLC);
- intel_uncore_write(uncore,
- GEN10_PAT_INDEX(3),
- GEN8_PPAT_UC);
- intel_uncore_write(uncore,
- GEN10_PAT_INDEX(4),
- GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(0));
- intel_uncore_write(uncore,
- GEN10_PAT_INDEX(5),
- GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(1));
- intel_uncore_write(uncore,
- GEN10_PAT_INDEX(6),
- GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(2));
- intel_uncore_write(uncore,
- GEN10_PAT_INDEX(7),
- GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(3));
-}
-
-/* The GGTT and PPGTT need a private PPAT setup in order to handle cacheability
- * bits. When using advanced contexts each context stores its own PAT, but
- * writing this data shouldn't be harmful even in those cases. */
-static void bdw_setup_private_ppat(struct intel_uncore *uncore)
-{
- u64 pat;
-
- pat = GEN8_PPAT(0, GEN8_PPAT_WB | GEN8_PPAT_LLC) | /* for normal objects, no eLLC */
- GEN8_PPAT(1, GEN8_PPAT_WC | GEN8_PPAT_LLCELLC) | /* for something pointing to ptes? */
- GEN8_PPAT(2, GEN8_PPAT_WT | GEN8_PPAT_LLCELLC) | /* for scanout with eLLC */
- GEN8_PPAT(3, GEN8_PPAT_UC) | /* Uncached objects, mostly for scanout */
- GEN8_PPAT(4, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(0)) |
- GEN8_PPAT(5, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(1)) |
- GEN8_PPAT(6, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(2)) |
- GEN8_PPAT(7, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(3));
-
- intel_uncore_write(uncore, GEN8_PRIVATE_PAT_LO, lower_32_bits(pat));
- intel_uncore_write(uncore, GEN8_PRIVATE_PAT_HI, upper_32_bits(pat));
-}
-
-static void chv_setup_private_ppat(struct intel_uncore *uncore)
-{
- u64 pat;
-
- /*
- * Map WB on BDW to snooped on CHV.
- *
- * Only the snoop bit has meaning for CHV, the rest is
- * ignored.
- *
- * The hardware will never snoop for certain types of accesses:
- * - CPU GTT (GMADR->GGTT->no snoop->memory)
- * - PPGTT page tables
- * - some other special cycles
- *
- * As with BDW, we also need to consider the following for GT accesses:
- * "For GGTT, there is NO pat_sel[2:0] from the entry,
- * so RTL will always use the value corresponding to
- * pat_sel = 000".
- * Which means we must set the snoop bit in PAT entry 0
- * in order to keep the global status page working.
- */
-
- pat = GEN8_PPAT(0, CHV_PPAT_SNOOP) |
- GEN8_PPAT(1, 0) |
- GEN8_PPAT(2, 0) |
- GEN8_PPAT(3, 0) |
- GEN8_PPAT(4, CHV_PPAT_SNOOP) |
- GEN8_PPAT(5, CHV_PPAT_SNOOP) |
- GEN8_PPAT(6, CHV_PPAT_SNOOP) |
- GEN8_PPAT(7, CHV_PPAT_SNOOP);
-
- intel_uncore_write(uncore, GEN8_PRIVATE_PAT_LO, lower_32_bits(pat));
- intel_uncore_write(uncore, GEN8_PRIVATE_PAT_HI, upper_32_bits(pat));
-}
-
-static void gen6_gmch_remove(struct i915_address_space *vm)
-{
- struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
-
- iounmap(ggtt->gsm);
- cleanup_scratch_page(vm);
-}
-
-static void setup_private_pat(struct intel_uncore *uncore)
-{
- struct drm_i915_private *i915 = uncore->i915;
-
- GEM_BUG_ON(INTEL_GEN(i915) < 8);
-
- if (INTEL_GEN(i915) >= 12)
- tgl_setup_private_ppat(uncore);
- else if (INTEL_GEN(i915) >= 10)
- cnl_setup_private_ppat(uncore);
- else if (IS_CHERRYVIEW(i915) || IS_GEN9_LP(i915))
- chv_setup_private_ppat(uncore);
- else
- bdw_setup_private_ppat(uncore);
-}
-
-static struct resource pci_resource(struct pci_dev *pdev, int bar)
-{
- return (struct resource)DEFINE_RES_MEM(pci_resource_start(pdev, bar),
- pci_resource_len(pdev, bar));
-}
-
-static int gen8_gmch_probe(struct i915_ggtt *ggtt)
-{
- struct drm_i915_private *dev_priv = ggtt->vm.i915;
- struct pci_dev *pdev = dev_priv->drm.pdev;
- unsigned int size;
- u16 snb_gmch_ctl;
- int err;
-
- /* TODO: We're not aware of mappable constraints on gen8 yet */
- if (!IS_DGFX(dev_priv)) {
- ggtt->gmadr = pci_resource(pdev, 2);
- ggtt->mappable_end = resource_size(&ggtt->gmadr);
- }
-
- err = pci_set_dma_mask(pdev, DMA_BIT_MASK(39));
- if (!err)
- err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(39));
- if (err)
- DRM_ERROR("Can't set DMA mask/consistent mask (%d)\n", err);
-
- pci_read_config_word(pdev, SNB_GMCH_CTRL, &snb_gmch_ctl);
- if (IS_CHERRYVIEW(dev_priv))
- size = chv_get_total_gtt_size(snb_gmch_ctl);
- else
- size = gen8_get_total_gtt_size(snb_gmch_ctl);
-
- ggtt->vm.total = (size / sizeof(gen8_pte_t)) * I915_GTT_PAGE_SIZE;
- ggtt->vm.cleanup = gen6_gmch_remove;
- ggtt->vm.insert_page = gen8_ggtt_insert_page;
- ggtt->vm.clear_range = nop_clear_range;
- if (intel_scanout_needs_vtd_wa(dev_priv))
- ggtt->vm.clear_range = gen8_ggtt_clear_range;
-
- ggtt->vm.insert_entries = gen8_ggtt_insert_entries;
-
- /* Serialize GTT updates with aperture access on BXT if VT-d is on. */
- if (intel_ggtt_update_needs_vtd_wa(dev_priv) ||
- IS_CHERRYVIEW(dev_priv) /* fails with concurrent use/update */) {
- ggtt->vm.insert_entries = bxt_vtd_ggtt_insert_entries__BKL;
- ggtt->vm.insert_page = bxt_vtd_ggtt_insert_page__BKL;
- if (ggtt->vm.clear_range != nop_clear_range)
- ggtt->vm.clear_range = bxt_vtd_ggtt_clear_range__BKL;
- }
-
- ggtt->invalidate = gen8_ggtt_invalidate;
-
- ggtt->vm.vma_ops.bind_vma = ggtt_bind_vma;
- ggtt->vm.vma_ops.unbind_vma = ggtt_unbind_vma;
- ggtt->vm.vma_ops.set_pages = ggtt_set_pages;
- ggtt->vm.vma_ops.clear_pages = clear_pages;
-
- ggtt->vm.pte_encode = gen8_pte_encode;
-
- setup_private_pat(ggtt->vm.gt->uncore);
-
- return ggtt_probe_common(ggtt, size);
-}
-
-static int gen6_gmch_probe(struct i915_ggtt *ggtt)
-{
- struct drm_i915_private *dev_priv = ggtt->vm.i915;
- struct pci_dev *pdev = dev_priv->drm.pdev;
- unsigned int size;
- u16 snb_gmch_ctl;
- int err;
-
- ggtt->gmadr =
- (struct resource) DEFINE_RES_MEM(pci_resource_start(pdev, 2),
- pci_resource_len(pdev, 2));
- ggtt->mappable_end = resource_size(&ggtt->gmadr);
-
- /* 64/512MB is the current min/max we actually know of, but this is just
- * a coarse sanity check.
- */
- if (ggtt->mappable_end < (64<<20) || ggtt->mappable_end > (512<<20)) {
- DRM_ERROR("Unknown GMADR size (%pa)\n", &ggtt->mappable_end);
- return -ENXIO;
- }
-
- err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
- if (!err)
- err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
- if (err)
- DRM_ERROR("Can't set DMA mask/consistent mask (%d)\n", err);
- pci_read_config_word(pdev, SNB_GMCH_CTRL, &snb_gmch_ctl);
-
- size = gen6_get_total_gtt_size(snb_gmch_ctl);
- ggtt->vm.total = (size / sizeof(gen6_pte_t)) * I915_GTT_PAGE_SIZE;
-
- ggtt->vm.clear_range = nop_clear_range;
- if (!HAS_FULL_PPGTT(dev_priv) || intel_scanout_needs_vtd_wa(dev_priv))
- ggtt->vm.clear_range = gen6_ggtt_clear_range;
- ggtt->vm.insert_page = gen6_ggtt_insert_page;
- ggtt->vm.insert_entries = gen6_ggtt_insert_entries;
- ggtt->vm.cleanup = gen6_gmch_remove;
-
- ggtt->invalidate = gen6_ggtt_invalidate;
-
- if (HAS_EDRAM(dev_priv))
- ggtt->vm.pte_encode = iris_pte_encode;
- else if (IS_HASWELL(dev_priv))
- ggtt->vm.pte_encode = hsw_pte_encode;
- else if (IS_VALLEYVIEW(dev_priv))
- ggtt->vm.pte_encode = byt_pte_encode;
- else if (INTEL_GEN(dev_priv) >= 7)
- ggtt->vm.pte_encode = ivb_pte_encode;
- else
- ggtt->vm.pte_encode = snb_pte_encode;
-
- ggtt->vm.vma_ops.bind_vma = ggtt_bind_vma;
- ggtt->vm.vma_ops.unbind_vma = ggtt_unbind_vma;
- ggtt->vm.vma_ops.set_pages = ggtt_set_pages;
- ggtt->vm.vma_ops.clear_pages = clear_pages;
-
- return ggtt_probe_common(ggtt, size);
-}
-
-static void i915_gmch_remove(struct i915_address_space *vm)
-{
- intel_gmch_remove();
-}
-
-static int i915_gmch_probe(struct i915_ggtt *ggtt)
-{
- struct drm_i915_private *dev_priv = ggtt->vm.i915;
- phys_addr_t gmadr_base;
- int ret;
-
- ret = intel_gmch_probe(dev_priv->bridge_dev, dev_priv->drm.pdev, NULL);
- if (!ret) {
- DRM_ERROR("failed to set up gmch\n");
- return -EIO;
- }
-
- intel_gtt_get(&ggtt->vm.total, &gmadr_base, &ggtt->mappable_end);
-
- ggtt->gmadr =
- (struct resource) DEFINE_RES_MEM(gmadr_base,
- ggtt->mappable_end);
-
- ggtt->do_idle_maps = needs_idle_maps(dev_priv);
- ggtt->vm.insert_page = i915_ggtt_insert_page;
- ggtt->vm.insert_entries = i915_ggtt_insert_entries;
- ggtt->vm.clear_range = i915_ggtt_clear_range;
- ggtt->vm.cleanup = i915_gmch_remove;
-
- ggtt->invalidate = gmch_ggtt_invalidate;
-
- ggtt->vm.vma_ops.bind_vma = ggtt_bind_vma;
- ggtt->vm.vma_ops.unbind_vma = ggtt_unbind_vma;
- ggtt->vm.vma_ops.set_pages = ggtt_set_pages;
- ggtt->vm.vma_ops.clear_pages = clear_pages;
-
- if (unlikely(ggtt->do_idle_maps))
- dev_notice(dev_priv->drm.dev,
- "Applying Ironlake quirks for intel_iommu\n");
-
- return 0;
-}
-
-static int ggtt_probe_hw(struct i915_ggtt *ggtt, struct intel_gt *gt)
-{
- struct drm_i915_private *i915 = gt->i915;
- int ret;
-
- ggtt->vm.gt = gt;
- ggtt->vm.i915 = i915;
- ggtt->vm.dma = &i915->drm.pdev->dev;
-
- if (INTEL_GEN(i915) <= 5)
- ret = i915_gmch_probe(ggtt);
- else if (INTEL_GEN(i915) < 8)
- ret = gen6_gmch_probe(ggtt);
- else
- ret = gen8_gmch_probe(ggtt);
- if (ret)
- return ret;
-
- if ((ggtt->vm.total - 1) >> 32) {
- DRM_ERROR("We never expected a Global GTT with more than 32bits"
- " of address space! Found %lldM!\n",
- ggtt->vm.total >> 20);
- ggtt->vm.total = 1ULL << 32;
- ggtt->mappable_end =
- min_t(u64, ggtt->mappable_end, ggtt->vm.total);
- }
-
- if (ggtt->mappable_end > ggtt->vm.total) {
- DRM_ERROR("mappable aperture extends past end of GGTT,"
- " aperture=%pa, total=%llx\n",
- &ggtt->mappable_end, ggtt->vm.total);
- ggtt->mappable_end = ggtt->vm.total;
- }
-
- /* GMADR is the PCI mmio aperture into the global GTT. */
- DRM_DEBUG_DRIVER("GGTT size = %lluM\n", ggtt->vm.total >> 20);
- DRM_DEBUG_DRIVER("GMADR size = %lluM\n", (u64)ggtt->mappable_end >> 20);
- DRM_DEBUG_DRIVER("DSM size = %lluM\n",
- (u64)resource_size(&intel_graphics_stolen_res) >> 20);
-
- return 0;
-}
-
-/**
- * i915_ggtt_probe_hw - Probe GGTT hardware location
- * @i915: i915 device
- */
-int i915_ggtt_probe_hw(struct drm_i915_private *i915)
-{
- int ret;
-
- ret = ggtt_probe_hw(&i915->ggtt, &i915->gt);
- if (ret)
- return ret;
-
- if (intel_vtd_active())
- dev_info(i915->drm.dev, "VT-d active for gfx access\n");
-
- return 0;
-}
-
-static int ggtt_init_hw(struct i915_ggtt *ggtt)
-{
- struct drm_i915_private *i915 = ggtt->vm.i915;
-
- i915_address_space_init(&ggtt->vm, VM_CLASS_GGTT);
-
- ggtt->vm.is_ggtt = true;
-
- /* Only VLV supports read-only GGTT mappings */
- ggtt->vm.has_read_only = IS_VALLEYVIEW(i915);
-
- if (!HAS_LLC(i915) && !HAS_PPGTT(i915))
- ggtt->vm.mm.color_adjust = i915_ggtt_color_adjust;
-
- if (ggtt->mappable_end) {
- if (!io_mapping_init_wc(&ggtt->iomap,
- ggtt->gmadr.start,
- ggtt->mappable_end)) {
- ggtt->vm.cleanup(&ggtt->vm);
- return -EIO;
- }
-
- ggtt->mtrr = arch_phys_wc_add(ggtt->gmadr.start,
- ggtt->mappable_end);
- }
-
- i915_ggtt_init_fences(ggtt);
-
- return 0;
-}
-
-/**
- * i915_ggtt_init_hw - Initialize GGTT hardware
- * @dev_priv: i915 device
- */
-int i915_ggtt_init_hw(struct drm_i915_private *dev_priv)
-{
- int ret;
-
- stash_init(&dev_priv->mm.wc_stash);
-
- /* Note that we use page colouring to enforce a guard page at the
- * end of the address space. This is required as the CS may prefetch
- * beyond the end of the batch buffer, across the page boundary,
- * and beyond the end of the GTT if we do not provide a guard.
- */
- ret = ggtt_init_hw(&dev_priv->ggtt);
- if (ret)
- return ret;
-
- return 0;
-}
-
-int i915_ggtt_enable_hw(struct drm_i915_private *dev_priv)
-{
- if (INTEL_GEN(dev_priv) < 6 && !intel_enable_gtt())
- return -EIO;
-
- return 0;
-}
-
-void i915_ggtt_enable_guc(struct i915_ggtt *ggtt)
-{
- GEM_BUG_ON(ggtt->invalidate != gen8_ggtt_invalidate);
-
- ggtt->invalidate = guc_ggtt_invalidate;
-
- ggtt->invalidate(ggtt);
-}
-
-void i915_ggtt_disable_guc(struct i915_ggtt *ggtt)
-{
- /* XXX Temporary pardon for error unload */
- if (ggtt->invalidate == gen8_ggtt_invalidate)
- return;
-
- /* We should only be called after i915_ggtt_enable_guc() */
- GEM_BUG_ON(ggtt->invalidate != guc_ggtt_invalidate);
-
- ggtt->invalidate = gen8_ggtt_invalidate;
-
- ggtt->invalidate(ggtt);
-}
-
-static void ggtt_restore_mappings(struct i915_ggtt *ggtt)
-{
- struct i915_vma *vma, *vn;
- bool flush = false;
- int open;
-
- intel_gt_check_and_clear_faults(ggtt->vm.gt);
-
- mutex_lock(&ggtt->vm.mutex);
-
- /* First fill our portion of the GTT with scratch pages */
- ggtt->vm.clear_range(&ggtt->vm, 0, ggtt->vm.total);
-
- /* Skip rewriting PTE on VMA unbind. */
- open = atomic_xchg(&ggtt->vm.open, 0);
-
- /* clflush objects bound into the GGTT and rebind them. */
- list_for_each_entry_safe(vma, vn, &ggtt->vm.bound_list, vm_link) {
- struct drm_i915_gem_object *obj = vma->obj;
-
- if (!i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND))
- continue;
-
- if (!__i915_vma_unbind(vma))
- continue;
-
- clear_bit(I915_VMA_GLOBAL_BIND_BIT, __i915_vma_flags(vma));
- WARN_ON(i915_vma_bind(vma,
- obj ? obj->cache_level : 0,
- PIN_GLOBAL, NULL));
- if (obj) { /* only used during resume => exclusive access */
- flush |= fetch_and_zero(&obj->write_domain);
- obj->read_domains |= I915_GEM_DOMAIN_GTT;
- }
- }
-
- atomic_set(&ggtt->vm.open, open);
- ggtt->invalidate(ggtt);
-
- mutex_unlock(&ggtt->vm.mutex);
-
- if (flush)
- wbinvd_on_all_cpus();
-}
-
-void i915_gem_restore_gtt_mappings(struct drm_i915_private *i915)
-{
- struct i915_ggtt *ggtt = &i915->ggtt;
-
- ggtt_restore_mappings(ggtt);
-
- if (INTEL_GEN(i915) >= 8)
- setup_private_pat(ggtt->vm.gt->uncore);
-}
-
-static struct scatterlist *
-rotate_pages(struct drm_i915_gem_object *obj, unsigned int offset,
- unsigned int width, unsigned int height,
- unsigned int stride,
- struct sg_table *st, struct scatterlist *sg)
-{
- unsigned int column, row;
- unsigned int src_idx;
-
- for (column = 0; column < width; column++) {
- src_idx = stride * (height - 1) + column + offset;
- for (row = 0; row < height; row++) {
- st->nents++;
- /* We don't need the pages, but need to initialize
- * the entries so the sg list can be happily traversed.
- * The only thing we need are DMA addresses.
- */
- sg_set_page(sg, NULL, I915_GTT_PAGE_SIZE, 0);
- sg_dma_address(sg) =
- i915_gem_object_get_dma_address(obj, src_idx);
- sg_dma_len(sg) = I915_GTT_PAGE_SIZE;
- sg = sg_next(sg);
- src_idx -= stride;
- }
- }
-
- return sg;
-}
-
-static noinline struct sg_table *
-intel_rotate_pages(struct intel_rotation_info *rot_info,
- struct drm_i915_gem_object *obj)
-{
- unsigned int size = intel_rotation_info_size(rot_info);
- struct sg_table *st;
- struct scatterlist *sg;
- int ret = -ENOMEM;
- int i;
-
- /* Allocate target SG list. */
- st = kmalloc(sizeof(*st), GFP_KERNEL);
- if (!st)
- goto err_st_alloc;
-
- ret = sg_alloc_table(st, size, GFP_KERNEL);
- if (ret)
- goto err_sg_alloc;
-
- st->nents = 0;
- sg = st->sgl;
-
- for (i = 0 ; i < ARRAY_SIZE(rot_info->plane); i++) {
- sg = rotate_pages(obj, rot_info->plane[i].offset,
- rot_info->plane[i].width, rot_info->plane[i].height,
- rot_info->plane[i].stride, st, sg);
- }
-
- return st;
-
-err_sg_alloc:
- kfree(st);
-err_st_alloc:
-
- DRM_DEBUG_DRIVER("Failed to create rotated mapping for object size %zu! (%ux%u tiles, %u pages)\n",
- obj->base.size, rot_info->plane[0].width, rot_info->plane[0].height, size);
-
- return ERR_PTR(ret);
-}
-
-static struct scatterlist *
-remap_pages(struct drm_i915_gem_object *obj, unsigned int offset,
- unsigned int width, unsigned int height,
- unsigned int stride,
- struct sg_table *st, struct scatterlist *sg)
-{
- unsigned int row;
-
- for (row = 0; row < height; row++) {
- unsigned int left = width * I915_GTT_PAGE_SIZE;
-
- while (left) {
- dma_addr_t addr;
- unsigned int length;
-
- /* We don't need the pages, but need to initialize
- * the entries so the sg list can be happily traversed.
- * The only thing we need are DMA addresses.
- */
-
- addr = i915_gem_object_get_dma_address_len(obj, offset, &length);
-
- length = min(left, length);
-
- st->nents++;
-
- sg_set_page(sg, NULL, length, 0);
- sg_dma_address(sg) = addr;
- sg_dma_len(sg) = length;
- sg = sg_next(sg);
-
- offset += length / I915_GTT_PAGE_SIZE;
- left -= length;
- }
-
- offset += stride - width;
- }
-
- return sg;
-}
-
-static noinline struct sg_table *
-intel_remap_pages(struct intel_remapped_info *rem_info,
- struct drm_i915_gem_object *obj)
-{
- unsigned int size = intel_remapped_info_size(rem_info);
- struct sg_table *st;
- struct scatterlist *sg;
- int ret = -ENOMEM;
- int i;
-
- /* Allocate target SG list. */
- st = kmalloc(sizeof(*st), GFP_KERNEL);
- if (!st)
- goto err_st_alloc;
-
- ret = sg_alloc_table(st, size, GFP_KERNEL);
- if (ret)
- goto err_sg_alloc;
-
- st->nents = 0;
- sg = st->sgl;
-
- for (i = 0 ; i < ARRAY_SIZE(rem_info->plane); i++) {
- sg = remap_pages(obj, rem_info->plane[i].offset,
- rem_info->plane[i].width, rem_info->plane[i].height,
- rem_info->plane[i].stride, st, sg);
- }
-
- i915_sg_trim(st);
-
- return st;
-
-err_sg_alloc:
- kfree(st);
-err_st_alloc:
-
- DRM_DEBUG_DRIVER("Failed to create remapped mapping for object size %zu! (%ux%u tiles, %u pages)\n",
- obj->base.size, rem_info->plane[0].width, rem_info->plane[0].height, size);
-
- return ERR_PTR(ret);
-}
-
-static noinline struct sg_table *
-intel_partial_pages(const struct i915_ggtt_view *view,
- struct drm_i915_gem_object *obj)
-{
- struct sg_table *st;
- struct scatterlist *sg, *iter;
- unsigned int count = view->partial.size;
- unsigned int offset;
- int ret = -ENOMEM;
-
- st = kmalloc(sizeof(*st), GFP_KERNEL);
- if (!st)
- goto err_st_alloc;
-
- ret = sg_alloc_table(st, count, GFP_KERNEL);
- if (ret)
- goto err_sg_alloc;
-
- iter = i915_gem_object_get_sg(obj, view->partial.offset, &offset);
- GEM_BUG_ON(!iter);
-
- sg = st->sgl;
- st->nents = 0;
- do {
- unsigned int len;
-
- len = min(iter->length - (offset << PAGE_SHIFT),
- count << PAGE_SHIFT);
- sg_set_page(sg, NULL, len, 0);
- sg_dma_address(sg) =
- sg_dma_address(iter) + (offset << PAGE_SHIFT);
- sg_dma_len(sg) = len;
-
- st->nents++;
- count -= len >> PAGE_SHIFT;
- if (count == 0) {
- sg_mark_end(sg);
- i915_sg_trim(st); /* Drop any unused tail entries. */
-
- return st;
- }
-
- sg = __sg_next(sg);
- iter = __sg_next(iter);
- offset = 0;
- } while (1);
-
-err_sg_alloc:
- kfree(st);
-err_st_alloc:
- return ERR_PTR(ret);
-}
-
-static int
-i915_get_ggtt_vma_pages(struct i915_vma *vma)
-{
- int ret;
-
- /* The vma->pages are only valid within the lifespan of the borrowed
- * obj->mm.pages. When the obj->mm.pages sg_table is regenerated, so
- * must be the vma->pages. A simple rule is that vma->pages must only
- * be accessed when the obj->mm.pages are pinned.
- */
- GEM_BUG_ON(!i915_gem_object_has_pinned_pages(vma->obj));
-
- switch (vma->ggtt_view.type) {
- default:
- GEM_BUG_ON(vma->ggtt_view.type);
- /* fall through */
- case I915_GGTT_VIEW_NORMAL:
- vma->pages = vma->obj->mm.pages;
- return 0;
-
- case I915_GGTT_VIEW_ROTATED:
- vma->pages =
- intel_rotate_pages(&vma->ggtt_view.rotated, vma->obj);
- break;
-
- case I915_GGTT_VIEW_REMAPPED:
- vma->pages =
- intel_remap_pages(&vma->ggtt_view.remapped, vma->obj);
- break;
-
- case I915_GGTT_VIEW_PARTIAL:
- vma->pages = intel_partial_pages(&vma->ggtt_view, vma->obj);
- break;
- }
-
- ret = 0;
- if (IS_ERR(vma->pages)) {
- ret = PTR_ERR(vma->pages);
- vma->pages = NULL;
- DRM_ERROR("Failed to get pages for VMA view type %u (%d)!\n",
- vma->ggtt_view.type, ret);
- }
- return ret;
+ dma_unmap_sg(kdev, pages->sgl, pages->nents, PCI_DMA_BIDIRECTIONAL);
}
/**
}
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
-#include "selftests/mock_gtt.c"
#include "selftests/i915_gem_gtt.c"
#endif
+/* SPDX-License-Identifier: MIT */
/*
- * Copyright © 2014 Intel Corporation
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- *
- * Please try to maintain the following order within this file unless it makes
- * sense to do otherwise. From top to bottom:
- * 1. typedefs
- * 2. #defines, and macros
- * 3. structure definitions
- * 4. function prototypes
- *
- * Within each section, please try to order by generation in ascending order,
- * from top to bottom (ie. gen6 on the top, gen8 on the bottom).
+ * Copyright © 2020 Intel Corporation
*/
#ifndef __I915_GEM_GTT_H__
#define __I915_GEM_GTT_H__
#include <linux/io-mapping.h>
-#include <linux/kref.h>
-#include <linux/mm.h>
-#include <linux/pagevec.h>
-#include <linux/workqueue.h>
+#include <linux/types.h>
#include <drm/drm_mm.h>
-#include "gt/intel_reset.h"
-#include "i915_gem_fence_reg.h"
-#include "i915_request.h"
+#include "gt/intel_gtt.h"
#include "i915_scatterlist.h"
-#include "i915_selftest.h"
-#include "gt/intel_timeline.h"
-#define I915_GTT_PAGE_SIZE_4K BIT_ULL(12)
-#define I915_GTT_PAGE_SIZE_64K BIT_ULL(16)
-#define I915_GTT_PAGE_SIZE_2M BIT_ULL(21)
-
-#define I915_GTT_PAGE_SIZE I915_GTT_PAGE_SIZE_4K
-#define I915_GTT_MAX_PAGE_SIZE I915_GTT_PAGE_SIZE_2M
-
-#define I915_GTT_PAGE_MASK -I915_GTT_PAGE_SIZE
-
-#define I915_GTT_MIN_ALIGNMENT I915_GTT_PAGE_SIZE
-
-#define I915_FENCE_REG_NONE -1
-#define I915_MAX_NUM_FENCES 32
-/* 32 fences + sign bit for FENCE_REG_NONE */
-#define I915_MAX_NUM_FENCE_BITS 6
-
-struct drm_i915_file_private;
struct drm_i915_gem_object;
-struct i915_vma;
-struct intel_gt;
-
-typedef u32 gen6_pte_t;
-typedef u64 gen8_pte_t;
-
-#define ggtt_total_entries(ggtt) ((ggtt)->vm.total >> PAGE_SHIFT)
-
-/* gen6-hsw has bit 11-4 for physical addr bit 39-32 */
-#define GEN6_GTT_ADDR_ENCODE(addr) ((addr) | (((addr) >> 28) & 0xff0))
-#define GEN6_PTE_ADDR_ENCODE(addr) GEN6_GTT_ADDR_ENCODE(addr)
-#define GEN6_PDE_ADDR_ENCODE(addr) GEN6_GTT_ADDR_ENCODE(addr)
-#define GEN6_PTE_CACHE_LLC (2 << 1)
-#define GEN6_PTE_UNCACHED (1 << 1)
-#define GEN6_PTE_VALID (1 << 0)
-
-#define I915_PTES(pte_len) ((unsigned int)(PAGE_SIZE / (pte_len)))
-#define I915_PTE_MASK(pte_len) (I915_PTES(pte_len) - 1)
-#define I915_PDES 512
-#define I915_PDE_MASK (I915_PDES - 1)
-#define NUM_PTE(pde_shift) (1 << (pde_shift - PAGE_SHIFT))
-
-#define GEN6_PTES I915_PTES(sizeof(gen6_pte_t))
-#define GEN6_PD_SIZE (I915_PDES * PAGE_SIZE)
-#define GEN6_PD_ALIGN (PAGE_SIZE * 16)
-#define GEN6_PDE_SHIFT 22
-#define GEN6_PDE_VALID (1 << 0)
-
-#define GEN7_PTE_CACHE_L3_LLC (3 << 1)
-
-#define BYT_PTE_SNOOPED_BY_CPU_CACHES (1 << 2)
-#define BYT_PTE_WRITEABLE (1 << 1)
-
-/* Cacheability Control is a 4-bit value. The low three bits are stored in bits
- * 3:1 of the PTE, while the fourth bit is stored in bit 11 of the PTE.
- */
-#define HSW_CACHEABILITY_CONTROL(bits) ((((bits) & 0x7) << 1) | \
- (((bits) & 0x8) << (11 - 3)))
-#define HSW_WB_LLC_AGE3 HSW_CACHEABILITY_CONTROL(0x2)
-#define HSW_WB_LLC_AGE0 HSW_CACHEABILITY_CONTROL(0x3)
-#define HSW_WB_ELLC_LLC_AGE3 HSW_CACHEABILITY_CONTROL(0x8)
-#define HSW_WB_ELLC_LLC_AGE0 HSW_CACHEABILITY_CONTROL(0xb)
-#define HSW_WT_ELLC_LLC_AGE3 HSW_CACHEABILITY_CONTROL(0x7)
-#define HSW_WT_ELLC_LLC_AGE0 HSW_CACHEABILITY_CONTROL(0x6)
-#define HSW_PTE_UNCACHED (0)
-#define HSW_GTT_ADDR_ENCODE(addr) ((addr) | (((addr) >> 28) & 0x7f0))
-#define HSW_PTE_ADDR_ENCODE(addr) HSW_GTT_ADDR_ENCODE(addr)
-
-/*
- * GEN8 32b style address is defined as a 3 level page table:
- * 31:30 | 29:21 | 20:12 | 11:0
- * PDPE | PDE | PTE | offset
- * The difference as compared to normal x86 3 level page table is the PDPEs are
- * programmed via register.
- *
- * GEN8 48b style address is defined as a 4 level page table:
- * 47:39 | 38:30 | 29:21 | 20:12 | 11:0
- * PML4E | PDPE | PDE | PTE | offset
- */
-#define GEN8_3LVL_PDPES 4
-
-#define PPAT_UNCACHED (_PAGE_PWT | _PAGE_PCD)
-#define PPAT_CACHED_PDE 0 /* WB LLC */
-#define PPAT_CACHED _PAGE_PAT /* WB LLCeLLC */
-#define PPAT_DISPLAY_ELLC _PAGE_PCD /* WT eLLC */
-
-#define CHV_PPAT_SNOOP (1<<6)
-#define GEN8_PPAT_AGE(x) ((x)<<4)
-#define GEN8_PPAT_LLCeLLC (3<<2)
-#define GEN8_PPAT_LLCELLC (2<<2)
-#define GEN8_PPAT_LLC (1<<2)
-#define GEN8_PPAT_WB (3<<0)
-#define GEN8_PPAT_WT (2<<0)
-#define GEN8_PPAT_WC (1<<0)
-#define GEN8_PPAT_UC (0<<0)
-#define GEN8_PPAT_ELLC_OVERRIDE (0<<2)
-#define GEN8_PPAT(i, x) ((u64)(x) << ((i) * 8))
-
-#define GEN8_PDE_IPS_64K BIT(11)
-#define GEN8_PDE_PS_2M BIT(7)
-
-#define for_each_sgt_daddr(__dp, __iter, __sgt) \
- __for_each_sgt_daddr(__dp, __iter, __sgt, I915_GTT_PAGE_SIZE)
-
-struct intel_remapped_plane_info {
- /* in gtt pages */
- unsigned int width, height, stride, offset;
-} __packed;
-
-struct intel_remapped_info {
- struct intel_remapped_plane_info plane[2];
- unsigned int unused_mbz;
-} __packed;
-
-struct intel_rotation_info {
- struct intel_remapped_plane_info plane[2];
-} __packed;
-
-struct intel_partial_info {
- u64 offset;
- unsigned int size;
-} __packed;
-
-enum i915_ggtt_view_type {
- I915_GGTT_VIEW_NORMAL = 0,
- I915_GGTT_VIEW_ROTATED = sizeof(struct intel_rotation_info),
- I915_GGTT_VIEW_PARTIAL = sizeof(struct intel_partial_info),
- I915_GGTT_VIEW_REMAPPED = sizeof(struct intel_remapped_info),
-};
-
-static inline void assert_i915_gem_gtt_types(void)
-{
- BUILD_BUG_ON(sizeof(struct intel_rotation_info) != 8*sizeof(unsigned int));
- BUILD_BUG_ON(sizeof(struct intel_partial_info) != sizeof(u64) + sizeof(unsigned int));
- BUILD_BUG_ON(sizeof(struct intel_remapped_info) != 9*sizeof(unsigned int));
-
- /* Check that rotation/remapped shares offsets for simplicity */
- BUILD_BUG_ON(offsetof(struct intel_remapped_info, plane[0]) !=
- offsetof(struct intel_rotation_info, plane[0]));
- BUILD_BUG_ON(offsetofend(struct intel_remapped_info, plane[1]) !=
- offsetofend(struct intel_rotation_info, plane[1]));
-
- /* As we encode the size of each branch inside the union into its type,
- * we have to be careful that each branch has a unique size.
- */
- switch ((enum i915_ggtt_view_type)0) {
- case I915_GGTT_VIEW_NORMAL:
- case I915_GGTT_VIEW_PARTIAL:
- case I915_GGTT_VIEW_ROTATED:
- case I915_GGTT_VIEW_REMAPPED:
- /* gcc complains if these are identical cases */
- break;
- }
-}
-
-struct i915_ggtt_view {
- enum i915_ggtt_view_type type;
- union {
- /* Members need to contain no holes/padding */
- struct intel_partial_info partial;
- struct intel_rotation_info rotated;
- struct intel_remapped_info remapped;
- };
-};
-
-enum i915_cache_level;
-
-struct i915_vma;
-
-struct i915_page_dma {
- struct page *page;
- union {
- dma_addr_t daddr;
-
- /* For gen6/gen7 only. This is the offset in the GGTT
- * where the page directory entries for PPGTT begin
- */
- u32 ggtt_offset;
- };
-};
-
-struct i915_page_scratch {
- struct i915_page_dma base;
- u64 encode;
-};
-
-struct i915_page_table {
- struct i915_page_dma base;
- atomic_t used;
-};
-
-struct i915_page_directory {
- struct i915_page_table pt;
- spinlock_t lock;
- void *entry[512];
-};
-
-#define __px_choose_expr(x, type, expr, other) \
- __builtin_choose_expr( \
- __builtin_types_compatible_p(typeof(x), type) || \
- __builtin_types_compatible_p(typeof(x), const type), \
- ({ type __x = (type)(x); expr; }), \
- other)
-
-#define px_base(px) \
- __px_choose_expr(px, struct i915_page_dma *, __x, \
- __px_choose_expr(px, struct i915_page_scratch *, &__x->base, \
- __px_choose_expr(px, struct i915_page_table *, &__x->base, \
- __px_choose_expr(px, struct i915_page_directory *, &__x->pt.base, \
- (void)0))))
-#define px_dma(px) (px_base(px)->daddr)
-
-#define px_pt(px) \
- __px_choose_expr(px, struct i915_page_table *, __x, \
- __px_choose_expr(px, struct i915_page_directory *, &__x->pt, \
- (void)0))
-#define px_used(px) (&px_pt(px)->used)
-
-struct i915_vma_ops {
- /* Map an object into an address space with the given cache flags. */
- int (*bind_vma)(struct i915_vma *vma,
- enum i915_cache_level cache_level,
- u32 flags);
- /*
- * Unmap an object from an address space. This usually consists of
- * setting the valid PTE entries to a reserved scratch page.
- */
- void (*unbind_vma)(struct i915_vma *vma);
-
- int (*set_pages)(struct i915_vma *vma);
- void (*clear_pages)(struct i915_vma *vma);
-};
-
-struct pagestash {
- spinlock_t lock;
- struct pagevec pvec;
-};
-
-struct i915_address_space {
- struct kref ref;
- struct rcu_work rcu;
-
- struct drm_mm mm;
- struct intel_gt *gt;
- struct drm_i915_private *i915;
- struct device *dma;
- /* Every address space belongs to a struct file - except for the global
- * GTT that is owned by the driver (and so @file is set to NULL). In
- * principle, no information should leak from one context to another
- * (or between files/processes etc) unless explicitly shared by the
- * owner. Tracking the owner is important in order to free up per-file
- * objects along with the file, to aide resource tracking, and to
- * assign blame.
- */
- struct drm_i915_file_private *file;
- u64 total; /* size addr space maps (ex. 2GB for ggtt) */
- u64 reserved; /* size addr space reserved */
-
- unsigned int bind_async_flags;
-
- /*
- * Each active user context has its own address space (in full-ppgtt).
- * Since the vm may be shared between multiple contexts, we count how
- * many contexts keep us "open". Once open hits zero, we are closed
- * and do not allow any new attachments, and proceed to shutdown our
- * vma and page directories.
- */
- atomic_t open;
-
- struct mutex mutex; /* protects vma and our lists */
-#define VM_CLASS_GGTT 0
-#define VM_CLASS_PPGTT 1
-
- struct i915_page_scratch scratch[4];
- unsigned int scratch_order;
- unsigned int top;
-
- /**
- * List of vma currently bound.
- */
- struct list_head bound_list;
-
- struct pagestash free_pages;
-
- /* Global GTT */
- bool is_ggtt:1;
-
- /* Some systems require uncached updates of the page directories */
- bool pt_kmap_wc:1;
-
- /* Some systems support read-only mappings for GGTT and/or PPGTT */
- bool has_read_only:1;
-
- u64 (*pte_encode)(dma_addr_t addr,
- enum i915_cache_level level,
- u32 flags); /* Create a valid PTE */
-#define PTE_READ_ONLY (1<<0)
-
- int (*allocate_va_range)(struct i915_address_space *vm,
- u64 start, u64 length);
- void (*clear_range)(struct i915_address_space *vm,
- u64 start, u64 length);
- void (*insert_page)(struct i915_address_space *vm,
- dma_addr_t addr,
- u64 offset,
- enum i915_cache_level cache_level,
- u32 flags);
- void (*insert_entries)(struct i915_address_space *vm,
- struct i915_vma *vma,
- enum i915_cache_level cache_level,
- u32 flags);
- void (*cleanup)(struct i915_address_space *vm);
-
- struct i915_vma_ops vma_ops;
-
- I915_SELFTEST_DECLARE(struct fault_attr fault_attr);
- I915_SELFTEST_DECLARE(bool scrub_64K);
-};
-
-#define i915_is_ggtt(vm) ((vm)->is_ggtt)
-
-static inline bool
-i915_vm_is_4lvl(const struct i915_address_space *vm)
-{
- return (vm->total - 1) >> 32;
-}
-
-static inline bool
-i915_vm_has_scratch_64K(struct i915_address_space *vm)
-{
- return vm->scratch_order == get_order(I915_GTT_PAGE_SIZE_64K);
-}
-
-static inline bool
-i915_vm_has_cache_coloring(struct i915_address_space *vm)
-{
- return i915_is_ggtt(vm) && vm->mm.color_adjust;
-}
-
-/* The Graphics Translation Table is the way in which GEN hardware translates a
- * Graphics Virtual Address into a Physical Address. In addition to the normal
- * collateral associated with any va->pa translations GEN hardware also has a
- * portion of the GTT which can be mapped by the CPU and remain both coherent
- * and correct (in cases like swizzling). That region is referred to as GMADR in
- * the spec.
- */
-struct i915_ggtt {
- struct i915_address_space vm;
-
- struct io_mapping iomap; /* Mapping to our CPU mappable region */
- struct resource gmadr; /* GMADR resource */
- resource_size_t mappable_end; /* End offset that we can CPU map */
-
- /** "Graphics Stolen Memory" holds the global PTEs */
- void __iomem *gsm;
- void (*invalidate)(struct i915_ggtt *ggtt);
-
- /** PPGTT used for aliasing the PPGTT with the GTT */
- struct i915_ppgtt *alias;
-
- bool do_idle_maps;
-
- int mtrr;
-
- /** Bit 6 swizzling required for X tiling */
- u32 bit_6_swizzle_x;
- /** Bit 6 swizzling required for Y tiling */
- u32 bit_6_swizzle_y;
-
- u32 pin_bias;
-
- unsigned int num_fences;
- struct i915_fence_reg fence_regs[I915_MAX_NUM_FENCES];
- struct list_head fence_list;
-
- /** List of all objects in gtt_space, currently mmaped by userspace.
- * All objects within this list must also be on bound_list.
- */
- struct list_head userfault_list;
-
- /* Manual runtime pm autosuspend delay for user GGTT mmaps */
- struct intel_wakeref_auto userfault_wakeref;
-
- struct drm_mm_node error_capture;
- struct drm_mm_node uc_fw;
-};
-
-struct i915_ppgtt {
- struct i915_address_space vm;
-
- struct i915_page_directory *pd;
-};
-
-struct gen6_ppgtt {
- struct i915_ppgtt base;
-
- struct mutex flush;
- struct i915_vma *vma;
- gen6_pte_t __iomem *pd_addr;
-
- atomic_t pin_count;
- struct mutex pin_mutex;
-
- bool scan_for_unused_pt;
-};
-
-#define __to_gen6_ppgtt(base) container_of(base, struct gen6_ppgtt, base)
-
-static inline struct gen6_ppgtt *to_gen6_ppgtt(struct i915_ppgtt *base)
-{
- BUILD_BUG_ON(offsetof(struct gen6_ppgtt, base));
- return __to_gen6_ppgtt(base);
-}
-
-/*
- * gen6_for_each_pde() iterates over every pde from start until start+length.
- * If start and start+length are not perfectly divisible, the macro will round
- * down and up as needed. Start=0 and length=2G effectively iterates over
- * every PDE in the system. The macro modifies ALL its parameters except 'pd',
- * so each of the other parameters should preferably be a simple variable, or
- * at most an lvalue with no side-effects!
- */
-#define gen6_for_each_pde(pt, pd, start, length, iter) \
- for (iter = gen6_pde_index(start); \
- length > 0 && iter < I915_PDES && \
- (pt = i915_pt_entry(pd, iter), true); \
- ({ u32 temp = ALIGN(start+1, 1 << GEN6_PDE_SHIFT); \
- temp = min(temp - start, length); \
- start += temp, length -= temp; }), ++iter)
-
-#define gen6_for_all_pdes(pt, pd, iter) \
- for (iter = 0; \
- iter < I915_PDES && \
- (pt = i915_pt_entry(pd, iter), true); \
- ++iter)
-
-static inline u32 i915_pte_index(u64 address, unsigned int pde_shift)
-{
- const u32 mask = NUM_PTE(pde_shift) - 1;
-
- return (address >> PAGE_SHIFT) & mask;
-}
-
-/* Helper to counts the number of PTEs within the given length. This count
- * does not cross a page table boundary, so the max value would be
- * GEN6_PTES for GEN6, and GEN8_PTES for GEN8.
-*/
-static inline u32 i915_pte_count(u64 addr, u64 length, unsigned int pde_shift)
-{
- const u64 mask = ~((1ULL << pde_shift) - 1);
- u64 end;
-
- GEM_BUG_ON(length == 0);
- GEM_BUG_ON(offset_in_page(addr | length));
-
- end = addr + length;
-
- if ((addr & mask) != (end & mask))
- return NUM_PTE(pde_shift) - i915_pte_index(addr, pde_shift);
-
- return i915_pte_index(end, pde_shift) - i915_pte_index(addr, pde_shift);
-}
-
-static inline u32 i915_pde_index(u64 addr, u32 shift)
-{
- return (addr >> shift) & I915_PDE_MASK;
-}
-
-static inline u32 gen6_pte_index(u32 addr)
-{
- return i915_pte_index(addr, GEN6_PDE_SHIFT);
-}
-
-static inline u32 gen6_pte_count(u32 addr, u32 length)
-{
- return i915_pte_count(addr, length, GEN6_PDE_SHIFT);
-}
-
-static inline u32 gen6_pde_index(u32 addr)
-{
- return i915_pde_index(addr, GEN6_PDE_SHIFT);
-}
-
-static inline struct i915_page_table *
-i915_pt_entry(const struct i915_page_directory * const pd,
- const unsigned short n)
-{
- return pd->entry[n];
-}
-
-static inline struct i915_page_directory *
-i915_pd_entry(const struct i915_page_directory * const pdp,
- const unsigned short n)
-{
- return pdp->entry[n];
-}
-
-static inline dma_addr_t
-i915_page_dir_dma_addr(const struct i915_ppgtt *ppgtt, const unsigned int n)
-{
- struct i915_page_dma *pt = ppgtt->pd->entry[n];
-
- return px_dma(pt ?: px_base(&ppgtt->vm.scratch[ppgtt->vm.top]));
-}
-
-static inline struct i915_ggtt *
-i915_vm_to_ggtt(struct i915_address_space *vm)
-{
- BUILD_BUG_ON(offsetof(struct i915_ggtt, vm));
- GEM_BUG_ON(!i915_is_ggtt(vm));
- return container_of(vm, struct i915_ggtt, vm);
-}
-
-static inline struct i915_ppgtt *
-i915_vm_to_ppgtt(struct i915_address_space *vm)
-{
- BUILD_BUG_ON(offsetof(struct i915_ppgtt, vm));
- GEM_BUG_ON(i915_is_ggtt(vm));
- return container_of(vm, struct i915_ppgtt, vm);
-}
-
-int i915_ggtt_probe_hw(struct drm_i915_private *dev_priv);
-int i915_ggtt_init_hw(struct drm_i915_private *dev_priv);
-int i915_ggtt_enable_hw(struct drm_i915_private *dev_priv);
-void i915_ggtt_enable_guc(struct i915_ggtt *ggtt);
-void i915_ggtt_disable_guc(struct i915_ggtt *ggtt);
-int i915_init_ggtt(struct drm_i915_private *dev_priv);
-void i915_ggtt_driver_release(struct drm_i915_private *dev_priv);
-
-static inline bool i915_ggtt_has_aperture(const struct i915_ggtt *ggtt)
-{
- return ggtt->mappable_end > 0;
-}
-
-int i915_ppgtt_init_hw(struct intel_gt *gt);
-
-struct i915_ppgtt *i915_ppgtt_create(struct drm_i915_private *dev_priv);
-
-static inline struct i915_address_space *
-i915_vm_get(struct i915_address_space *vm)
-{
- kref_get(&vm->ref);
- return vm;
-}
-
-void i915_vm_release(struct kref *kref);
-
-static inline void i915_vm_put(struct i915_address_space *vm)
-{
- kref_put(&vm->ref, i915_vm_release);
-}
-
-static inline struct i915_address_space *
-i915_vm_open(struct i915_address_space *vm)
-{
- GEM_BUG_ON(!atomic_read(&vm->open));
- atomic_inc(&vm->open);
- return i915_vm_get(vm);
-}
-
-static inline bool
-i915_vm_tryopen(struct i915_address_space *vm)
-{
- if (atomic_add_unless(&vm->open, 1, 0))
- return i915_vm_get(vm);
-
- return false;
-}
-
-void __i915_vm_close(struct i915_address_space *vm);
-
-static inline void
-i915_vm_close(struct i915_address_space *vm)
-{
- GEM_BUG_ON(!atomic_read(&vm->open));
- if (atomic_dec_and_test(&vm->open))
- __i915_vm_close(vm);
-
- i915_vm_put(vm);
-}
-
-int gen6_ppgtt_pin(struct i915_ppgtt *base);
-void gen6_ppgtt_unpin(struct i915_ppgtt *base);
-void gen6_ppgtt_unpin_all(struct i915_ppgtt *base);
-
-void i915_gem_suspend_gtt_mappings(struct drm_i915_private *dev_priv);
-void i915_gem_restore_gtt_mappings(struct drm_i915_private *dev_priv);
+struct i915_address_space;
int __must_check i915_gem_gtt_prepare_pages(struct drm_i915_gem_object *obj,
struct sg_table *pages);
#define PIN_GLOBAL BIT_ULL(10) /* I915_VMA_GLOBAL_BIND */
#define PIN_USER BIT_ULL(11) /* I915_VMA_LOCAL_BIND */
-#define PIN_OFFSET_MASK (-I915_GTT_PAGE_SIZE)
+#define PIN_OFFSET_MASK I915_GTT_PAGE_MASK
#endif
#include <drm/drm_mm.h>
+#include "gem/i915_gem_object.h"
+
#include "i915_gem_gtt.h"
#include "i915_gem_fence_reg.h"
-#include "gem/i915_gem_object.h"
#include "i915_active.h"
#include "i915_request.h"
-
-enum i915_cache_level;
-
-/**
- * DOC: Virtual Memory Address
- *
- * A VMA represents a GEM BO that is bound into an address space. Therefore, a
- * VMA's presence cannot be guaranteed before binding, or after unbinding the
- * object into/from the address space.
- *
- * To make things as simple as possible (ie. no refcounting), a VMA's lifetime
- * will always be <= an objects lifetime. So object refcounting should cover us.
- */
-struct i915_vma {
- struct drm_mm_node node;
-
- struct i915_address_space *vm;
- const struct i915_vma_ops *ops;
-
- struct drm_i915_gem_object *obj;
- struct dma_resv *resv; /** Alias of obj->resv */
-
- struct sg_table *pages;
- void __iomem *iomap;
- void *private; /* owned by creator */
-
- struct i915_fence_reg *fence;
-
- u64 size;
- u64 display_alignment;
- struct i915_page_sizes page_sizes;
-
- /* mmap-offset associated with fencing for this vma */
- struct i915_mmap_offset *mmo;
-
- u32 fence_size;
- u32 fence_alignment;
-
- /**
- * Count of the number of times this vma has been opened by different
- * handles (but same file) for execbuf, i.e. the number of aliases
- * that exist in the ctx->handle_vmas LUT for this vma.
- */
- struct kref ref;
- atomic_t open_count;
- atomic_t flags;
- /**
- * How many users have pinned this object in GTT space.
- *
- * This is a tightly bound, fairly small number of users, so we
- * stuff inside the flags field so that we can both check for overflow
- * and detect a no-op i915_vma_pin() in a single check, while also
- * pinning the vma.
- *
- * The worst case display setup would have the same vma pinned for
- * use on each plane on each crtc, while also building the next atomic
- * state and holding a pin for the length of the cleanup queue. In the
- * future, the flip queue may be increased from 1.
- * Estimated worst case: 3 [qlen] * 4 [max crtcs] * 7 [max planes] = 84
- *
- * For GEM, the number of concurrent users for pwrite/pread is
- * unbounded. For execbuffer, it is currently one but will in future
- * be extended to allow multiple clients to pin vma concurrently.
- *
- * We also use suballocated pages, with each suballocation claiming
- * its own pin on the shared vma. At present, this is limited to
- * exclusive cachelines of a single page, so a maximum of 64 possible
- * users.
- */
-#define I915_VMA_PIN_MASK 0x3ff
-#define I915_VMA_OVERFLOW 0x200
-
- /** Flags and address space this VMA is bound to */
-#define I915_VMA_GLOBAL_BIND_BIT 10
-#define I915_VMA_LOCAL_BIND_BIT 11
-
-#define I915_VMA_GLOBAL_BIND ((int)BIT(I915_VMA_GLOBAL_BIND_BIT))
-#define I915_VMA_LOCAL_BIND ((int)BIT(I915_VMA_LOCAL_BIND_BIT))
-
-#define I915_VMA_BIND_MASK (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND)
-
-#define I915_VMA_ALLOC_BIT 12
-#define I915_VMA_ALLOC ((int)BIT(I915_VMA_ALLOC_BIT))
-
-#define I915_VMA_ERROR_BIT 13
-#define I915_VMA_ERROR ((int)BIT(I915_VMA_ERROR_BIT))
-
-#define I915_VMA_GGTT_BIT 14
-#define I915_VMA_CAN_FENCE_BIT 15
-#define I915_VMA_USERFAULT_BIT 16
-#define I915_VMA_GGTT_WRITE_BIT 17
-
-#define I915_VMA_GGTT ((int)BIT(I915_VMA_GGTT_BIT))
-#define I915_VMA_CAN_FENCE ((int)BIT(I915_VMA_CAN_FENCE_BIT))
-#define I915_VMA_USERFAULT ((int)BIT(I915_VMA_USERFAULT_BIT))
-#define I915_VMA_GGTT_WRITE ((int)BIT(I915_VMA_GGTT_WRITE_BIT))
-
- struct i915_active active;
-
-#define I915_VMA_PAGES_BIAS 24
-#define I915_VMA_PAGES_ACTIVE (BIT(24) | 1)
- atomic_t pages_count; /* number of active binds to the pages */
- struct mutex pages_mutex; /* protect acquire/release of backing pages */
-
- /**
- * Support different GGTT views into the same object.
- * This means there can be multiple VMA mappings per object and per VM.
- * i915_ggtt_view_type is used to distinguish between those entries.
- * The default one of zero (I915_GGTT_VIEW_NORMAL) is default and also
- * assumed in GEM functions which take no ggtt view parameter.
- */
- struct i915_ggtt_view ggtt_view;
-
- /** This object's place on the active/inactive lists */
- struct list_head vm_link;
-
- struct list_head obj_link; /* Link in the object's VMA list */
- struct rb_node obj_node;
- struct hlist_node obj_hash;
-
- /** This vma's place in the execbuf reservation list */
- struct list_head exec_link;
- struct list_head reloc_link;
-
- /** This vma's place in the eviction list */
- struct list_head evict_link;
-
- struct list_head closed_link;
-
- /**
- * Used for performing relocations during execbuffer insertion.
- */
- unsigned int *exec_flags;
- struct hlist_node exec_node;
- u32 exec_handle;
-};
+#include "i915_vma_types.h"
struct i915_vma *
i915_vma_instance(struct drm_i915_gem_object *obj,
--- /dev/null
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ */
+
+#ifndef __I915_VMA_TYPES_H__
+#define __I915_VMA_TYPES_H__
+
+#include <linux/rbtree.h>
+
+#include <drm/drm_mm.h>
+
+#include "gem/i915_gem_object_types.h"
+
+enum i915_cache_level;
+
+/**
+ * DOC: Global GTT views
+ *
+ * Background and previous state
+ *
+ * Historically objects could exists (be bound) in global GTT space only as
+ * singular instances with a view representing all of the object's backing pages
+ * in a linear fashion. This view will be called a normal view.
+ *
+ * To support multiple views of the same object, where the number of mapped
+ * pages is not equal to the backing store, or where the layout of the pages
+ * is not linear, concept of a GGTT view was added.
+ *
+ * One example of an alternative view is a stereo display driven by a single
+ * image. In this case we would have a framebuffer looking like this
+ * (2x2 pages):
+ *
+ * 12
+ * 34
+ *
+ * Above would represent a normal GGTT view as normally mapped for GPU or CPU
+ * rendering. In contrast, fed to the display engine would be an alternative
+ * view which could look something like this:
+ *
+ * 1212
+ * 3434
+ *
+ * In this example both the size and layout of pages in the alternative view is
+ * different from the normal view.
+ *
+ * Implementation and usage
+ *
+ * GGTT views are implemented using VMAs and are distinguished via enum
+ * i915_ggtt_view_type and struct i915_ggtt_view.
+ *
+ * A new flavour of core GEM functions which work with GGTT bound objects were
+ * added with the _ggtt_ infix, and sometimes with _view postfix to avoid
+ * renaming in large amounts of code. They take the struct i915_ggtt_view
+ * parameter encapsulating all metadata required to implement a view.
+ *
+ * As a helper for callers which are only interested in the normal view,
+ * globally const i915_ggtt_view_normal singleton instance exists. All old core
+ * GEM API functions, the ones not taking the view parameter, are operating on,
+ * or with the normal GGTT view.
+ *
+ * Code wanting to add or use a new GGTT view needs to:
+ *
+ * 1. Add a new enum with a suitable name.
+ * 2. Extend the metadata in the i915_ggtt_view structure if required.
+ * 3. Add support to i915_get_vma_pages().
+ *
+ * New views are required to build a scatter-gather table from within the
+ * i915_get_vma_pages function. This table is stored in the vma.ggtt_view and
+ * exists for the lifetime of an VMA.
+ *
+ * Core API is designed to have copy semantics which means that passed in
+ * struct i915_ggtt_view does not need to be persistent (left around after
+ * calling the core API functions).
+ *
+ */
+
+struct intel_remapped_plane_info {
+ /* in gtt pages */
+ unsigned int width, height, stride, offset;
+} __packed;
+
+struct intel_remapped_info {
+ struct intel_remapped_plane_info plane[2];
+ unsigned int unused_mbz;
+} __packed;
+
+struct intel_rotation_info {
+ struct intel_remapped_plane_info plane[2];
+} __packed;
+
+struct intel_partial_info {
+ u64 offset;
+ unsigned int size;
+} __packed;
+
+enum i915_ggtt_view_type {
+ I915_GGTT_VIEW_NORMAL = 0,
+ I915_GGTT_VIEW_ROTATED = sizeof(struct intel_rotation_info),
+ I915_GGTT_VIEW_PARTIAL = sizeof(struct intel_partial_info),
+ I915_GGTT_VIEW_REMAPPED = sizeof(struct intel_remapped_info),
+};
+
+static inline void assert_i915_gem_gtt_types(void)
+{
+ BUILD_BUG_ON(sizeof(struct intel_rotation_info) != 8*sizeof(unsigned int));
+ BUILD_BUG_ON(sizeof(struct intel_partial_info) != sizeof(u64) + sizeof(unsigned int));
+ BUILD_BUG_ON(sizeof(struct intel_remapped_info) != 9*sizeof(unsigned int));
+
+ /* Check that rotation/remapped shares offsets for simplicity */
+ BUILD_BUG_ON(offsetof(struct intel_remapped_info, plane[0]) !=
+ offsetof(struct intel_rotation_info, plane[0]));
+ BUILD_BUG_ON(offsetofend(struct intel_remapped_info, plane[1]) !=
+ offsetofend(struct intel_rotation_info, plane[1]));
+
+ /* As we encode the size of each branch inside the union into its type,
+ * we have to be careful that each branch has a unique size.
+ */
+ switch ((enum i915_ggtt_view_type)0) {
+ case I915_GGTT_VIEW_NORMAL:
+ case I915_GGTT_VIEW_PARTIAL:
+ case I915_GGTT_VIEW_ROTATED:
+ case I915_GGTT_VIEW_REMAPPED:
+ /* gcc complains if these are identical cases */
+ break;
+ }
+}
+
+struct i915_ggtt_view {
+ enum i915_ggtt_view_type type;
+ union {
+ /* Members need to contain no holes/padding */
+ struct intel_partial_info partial;
+ struct intel_rotation_info rotated;
+ struct intel_remapped_info remapped;
+ };
+};
+
+/**
+ * DOC: Virtual Memory Address
+ *
+ * A VMA represents a GEM BO that is bound into an address space. Therefore, a
+ * VMA's presence cannot be guaranteed before binding, or after unbinding the
+ * object into/from the address space.
+ *
+ * To make things as simple as possible (ie. no refcounting), a VMA's lifetime
+ * will always be <= an objects lifetime. So object refcounting should cover us.
+ */
+struct i915_vma {
+ struct drm_mm_node node;
+
+ struct i915_address_space *vm;
+ const struct i915_vma_ops *ops;
+
+ struct drm_i915_gem_object *obj;
+ struct dma_resv *resv; /** Alias of obj->resv */
+
+ struct sg_table *pages;
+ void __iomem *iomap;
+ void *private; /* owned by creator */
+
+ struct i915_fence_reg *fence;
+
+ u64 size;
+ u64 display_alignment;
+ struct i915_page_sizes page_sizes;
+
+ /* mmap-offset associated with fencing for this vma */
+ struct i915_mmap_offset *mmo;
+
+ u32 fence_size;
+ u32 fence_alignment;
+
+ /**
+ * Count of the number of times this vma has been opened by different
+ * handles (but same file) for execbuf, i.e. the number of aliases
+ * that exist in the ctx->handle_vmas LUT for this vma.
+ */
+ struct kref ref;
+ atomic_t open_count;
+ atomic_t flags;
+ /**
+ * How many users have pinned this object in GTT space.
+ *
+ * This is a tightly bound, fairly small number of users, so we
+ * stuff inside the flags field so that we can both check for overflow
+ * and detect a no-op i915_vma_pin() in a single check, while also
+ * pinning the vma.
+ *
+ * The worst case display setup would have the same vma pinned for
+ * use on each plane on each crtc, while also building the next atomic
+ * state and holding a pin for the length of the cleanup queue. In the
+ * future, the flip queue may be increased from 1.
+ * Estimated worst case: 3 [qlen] * 4 [max crtcs] * 7 [max planes] = 84
+ *
+ * For GEM, the number of concurrent users for pwrite/pread is
+ * unbounded. For execbuffer, it is currently one but will in future
+ * be extended to allow multiple clients to pin vma concurrently.
+ *
+ * We also use suballocated pages, with each suballocation claiming
+ * its own pin on the shared vma. At present, this is limited to
+ * exclusive cachelines of a single page, so a maximum of 64 possible
+ * users.
+ */
+#define I915_VMA_PIN_MASK 0x3ff
+#define I915_VMA_OVERFLOW 0x200
+
+ /** Flags and address space this VMA is bound to */
+#define I915_VMA_GLOBAL_BIND_BIT 10
+#define I915_VMA_LOCAL_BIND_BIT 11
+
+#define I915_VMA_GLOBAL_BIND ((int)BIT(I915_VMA_GLOBAL_BIND_BIT))
+#define I915_VMA_LOCAL_BIND ((int)BIT(I915_VMA_LOCAL_BIND_BIT))
+
+#define I915_VMA_BIND_MASK (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND)
+
+#define I915_VMA_ALLOC_BIT 12
+#define I915_VMA_ALLOC ((int)BIT(I915_VMA_ALLOC_BIT))
+
+#define I915_VMA_ERROR_BIT 13
+#define I915_VMA_ERROR ((int)BIT(I915_VMA_ERROR_BIT))
+
+#define I915_VMA_GGTT_BIT 14
+#define I915_VMA_CAN_FENCE_BIT 15
+#define I915_VMA_USERFAULT_BIT 16
+#define I915_VMA_GGTT_WRITE_BIT 17
+
+#define I915_VMA_GGTT ((int)BIT(I915_VMA_GGTT_BIT))
+#define I915_VMA_CAN_FENCE ((int)BIT(I915_VMA_CAN_FENCE_BIT))
+#define I915_VMA_USERFAULT ((int)BIT(I915_VMA_USERFAULT_BIT))
+#define I915_VMA_GGTT_WRITE ((int)BIT(I915_VMA_GGTT_WRITE_BIT))
+
+ struct i915_active active;
+
+#define I915_VMA_PAGES_BIAS 24
+#define I915_VMA_PAGES_ACTIVE (BIT(24) | 1)
+ atomic_t pages_count; /* number of active binds to the pages */
+ struct mutex pages_mutex; /* protect acquire/release of backing pages */
+
+ /**
+ * Support different GGTT views into the same object.
+ * This means there can be multiple VMA mappings per object and per VM.
+ * i915_ggtt_view_type is used to distinguish between those entries.
+ * The default one of zero (I915_GGTT_VIEW_NORMAL) is default and also
+ * assumed in GEM functions which take no ggtt view parameter.
+ */
+ struct i915_ggtt_view ggtt_view;
+
+ /** This object's place on the active/inactive lists */
+ struct list_head vm_link;
+
+ struct list_head obj_link; /* Link in the object's VMA list */
+ struct rb_node obj_node;
+ struct hlist_node obj_hash;
+
+ /** This vma's place in the execbuf reservation list */
+ struct list_head exec_link;
+ struct list_head reloc_link;
+
+ /** This vma's place in the eviction list */
+ struct list_head evict_link;
+
+ struct list_head closed_link;
+
+ /**
+ * Used for performing relocations during execbuffer insertion.
+ */
+ unsigned int *exec_flags;
+ struct hlist_node exec_node;
+ u32 exec_handle;
+};
+
+#endif
+
#include "mock_drm.h"
#include "mock_gem_device.h"
+#include "mock_gtt.h"
#include "igt_flush_test.h"
static void cleanup_freed_objects(struct drm_i915_private *i915)
if (!HAS_PPGTT(dev_priv))
return 0;
- ppgtt = __ppgtt_create(dev_priv);
+ ppgtt = i915_ppgtt_create(&dev_priv->gt);
if (IS_ERR(ppgtt))
return PTR_ERR(ppgtt);
return err;
}
-static int lowlevel_hole(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+static int lowlevel_hole(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
* memory. We expect to hit -ENOMEM.
*/
- obj = fake_dma_object(i915, BIT_ULL(size));
+ obj = fake_dma_object(vm->i915, BIT_ULL(size));
if (IS_ERR(obj)) {
kfree(order);
break;
mock_vma->node.size = BIT_ULL(size);
mock_vma->node.start = addr;
- with_intel_runtime_pm(&i915->runtime_pm, wakeref)
+ with_intel_runtime_pm(vm->gt->uncore->rpm, wakeref)
vm->insert_entries(vm, mock_vma,
I915_CACHE_NONE, 0);
}
intel_wakeref_t wakeref;
GEM_BUG_ON(addr + BIT_ULL(size) > vm->total);
- with_intel_runtime_pm(&i915->runtime_pm, wakeref)
+ with_intel_runtime_pm(vm->gt->uncore->rpm, wakeref)
vm->clear_range(vm, addr, BIT_ULL(size));
}
kfree(order);
- cleanup_freed_objects(i915);
+ cleanup_freed_objects(vm->i915);
}
kfree(mock_vma);
}
}
-static int fill_hole(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+static int fill_hole(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
{ }
}, *p;
- obj = fake_dma_object(i915, full_size);
+ obj = fake_dma_object(vm->i915, full_size);
if (IS_ERR(obj))
break;
}
close_object_list(&objects, vm);
- cleanup_freed_objects(i915);
+ cleanup_freed_objects(vm->i915);
}
return 0;
return err;
}
-static int walk_hole(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+static int walk_hole(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
u64 addr;
int err = 0;
- obj = fake_dma_object(i915, size << PAGE_SHIFT);
+ obj = fake_dma_object(vm->i915, size << PAGE_SHIFT);
if (IS_ERR(obj))
break;
if (err)
return err;
- cleanup_freed_objects(i915);
+ cleanup_freed_objects(vm->i915);
}
return 0;
}
-static int pot_hole(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+static int pot_hole(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
if (i915_is_ggtt(vm))
flags |= PIN_GLOBAL;
- obj = i915_gem_object_create_internal(i915, 2 * I915_GTT_PAGE_SIZE);
+ obj = i915_gem_object_create_internal(vm->i915, 2 * I915_GTT_PAGE_SIZE);
if (IS_ERR(obj))
return PTR_ERR(obj);
return err;
}
-static int drunk_hole(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+static int drunk_hole(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
* memory. We expect to hit -ENOMEM.
*/
- obj = fake_dma_object(i915, BIT_ULL(size));
+ obj = fake_dma_object(vm->i915, BIT_ULL(size));
if (IS_ERR(obj)) {
kfree(order);
break;
if (err)
return err;
- cleanup_freed_objects(i915);
+ cleanup_freed_objects(vm->i915);
}
return 0;
}
-static int __shrink_hole(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+static int __shrink_hole(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
u64 size = BIT_ULL(order++);
size = min(size, hole_end - addr);
- obj = fake_dma_object(i915, size);
+ obj = fake_dma_object(vm->i915, size);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
break;
}
close_object_list(&objects, vm);
- cleanup_freed_objects(i915);
+ cleanup_freed_objects(vm->i915);
return err;
}
-static int shrink_hole(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+static int shrink_hole(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
for_each_prime_number_from(prime, 0, ULONG_MAX - 1) {
vm->fault_attr.interval = prime;
- err = __shrink_hole(i915, vm, hole_start, hole_end, end_time);
+ err = __shrink_hole(vm, hole_start, hole_end, end_time);
if (err)
break;
}
return err;
}
-static int shrink_boom(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+static int shrink_boom(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
unsigned int size = sizes[i];
struct i915_vma *vma;
- purge = fake_dma_object(i915, size);
+ purge = fake_dma_object(vm->i915, size);
if (IS_ERR(purge))
return PTR_ERR(purge);
/* Should now be ripe for purging */
i915_vma_unpin(vma);
- explode = fake_dma_object(i915, size);
+ explode = fake_dma_object(vm->i915, size);
if (IS_ERR(explode)) {
err = PTR_ERR(explode);
goto err_purge;
i915_gem_object_put(explode);
memset(&vm->fault_attr, 0, sizeof(vm->fault_attr));
- cleanup_freed_objects(i915);
+ cleanup_freed_objects(vm->i915);
}
return 0;
}
static int exercise_ppgtt(struct drm_i915_private *dev_priv,
- int (*func)(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+ int (*func)(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time))
{
if (IS_ERR(file))
return PTR_ERR(file);
- ppgtt = i915_ppgtt_create(dev_priv);
+ ppgtt = i915_ppgtt_create(&dev_priv->gt);
if (IS_ERR(ppgtt)) {
err = PTR_ERR(ppgtt);
goto out_free;
GEM_BUG_ON(offset_in_page(ppgtt->vm.total));
GEM_BUG_ON(!atomic_read(&ppgtt->vm.open));
- err = func(dev_priv, &ppgtt->vm, 0, ppgtt->vm.total, end_time);
+ err = func(&ppgtt->vm, 0, ppgtt->vm.total, end_time);
i915_vm_put(&ppgtt->vm);
}
static int exercise_ggtt(struct drm_i915_private *i915,
- int (*func)(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+ int (*func)(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time))
{
if (hole_start >= hole_end)
continue;
- err = func(i915, &ggtt->vm, hole_start, hole_end, end_time);
+ err = func(&ggtt->vm, hole_start, hole_end, end_time);
if (err)
break;
}
static int exercise_mock(struct drm_i915_private *i915,
- int (*func)(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+ int (*func)(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time))
{
return -ENOMEM;
vm = i915_gem_context_get_vm_rcu(ctx);
- err = func(i915, vm, 0, min(vm->total, limit), end_time);
+ err = func(vm, 0, min(vm->total, limit), end_time);
i915_vm_put(vm);
mock_context_close(ctx);
{
}
+static void mock_clear_range(struct i915_address_space *vm,
+ u64 start, u64 length)
+{
+}
+
struct i915_ppgtt *mock_ppgtt(struct drm_i915_private *i915, const char *name)
{
struct i915_ppgtt *ppgtt;
i915_address_space_init(&ppgtt->vm, VM_CLASS_PPGTT);
- ppgtt->vm.clear_range = nop_clear_range;
+ ppgtt->vm.clear_range = mock_clear_range;
ppgtt->vm.insert_page = mock_insert_page;
ppgtt->vm.insert_entries = mock_insert_entries;
ppgtt->vm.cleanup = mock_cleanup;
ggtt->mappable_end = resource_size(&ggtt->gmadr);
ggtt->vm.total = 4096 * PAGE_SIZE;
- ggtt->vm.clear_range = nop_clear_range;
+ ggtt->vm.clear_range = mock_clear_range;
ggtt->vm.insert_page = mock_insert_page;
ggtt->vm.insert_entries = mock_insert_entries;
ggtt->vm.cleanup = mock_cleanup;
projects / linux-2.6-microblaze.git / commitdiff