2 * Copyright © 2016 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
25 #ifndef __I915_VMA_H__
26 #define __I915_VMA_H__
28 #include <linux/io-mapping.h>
30 #include <drm/drm_mm.h>
32 #include "i915_gem_gtt.h"
33 #include "i915_gem_fence_reg.h"
34 #include "i915_gem_object.h"
36 #include "i915_request.h"
38 enum i915_cache_level;
41 * A VMA represents a GEM BO that is bound into an address space. Therefore, a
42 * VMA's presence cannot be guaranteed before binding, or after unbinding the
43 * object into/from the address space.
45 * To make things as simple as possible (ie. no refcounting), a VMA's lifetime
46 * will always be <= an objects lifetime. So object refcounting should cover us.
49 struct drm_mm_node node;
50 struct drm_i915_gem_object *obj;
51 struct i915_address_space *vm;
52 struct drm_i915_fence_reg *fence;
53 struct reservation_object *resv; /** Alias of obj->resv */
54 struct sg_table *pages;
57 u64 display_alignment;
58 struct i915_page_sizes page_sizes;
64 * Count of the number of times this vma has been opened by different
65 * handles (but same file) for execbuf, i.e. the number of aliases
66 * that exist in the ctx->handle_vmas LUT for this vma.
68 unsigned int open_count;
71 * How many users have pinned this object in GTT space. The following
72 * users can each hold at most one reference: pwrite/pread, execbuffer
73 * (objects are not allowed multiple times for the same batchbuffer),
74 * and the framebuffer code. When switching/pageflipping, the
75 * framebuffer code has at most two buffers pinned per crtc.
77 * In the worst case this is 1 + 1 + 1 + 2*2 = 7. That would fit into 3
78 * bits with absolutely no headroom. So use 4 bits.
80 #define I915_VMA_PIN_MASK 0xf
81 #define I915_VMA_PIN_OVERFLOW BIT(5)
83 /** Flags and address space this VMA is bound to */
84 #define I915_VMA_GLOBAL_BIND BIT(6)
85 #define I915_VMA_LOCAL_BIND BIT(7)
86 #define I915_VMA_BIND_MASK (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND | I915_VMA_PIN_OVERFLOW)
88 #define I915_VMA_GGTT BIT(8)
89 #define I915_VMA_CAN_FENCE BIT(9)
90 #define I915_VMA_CLOSED BIT(10)
91 #define I915_VMA_USERFAULT_BIT 11
92 #define I915_VMA_USERFAULT BIT(I915_VMA_USERFAULT_BIT)
93 #define I915_VMA_GGTT_WRITE BIT(12)
96 struct i915_gem_active last_read[I915_NUM_ENGINES];
97 struct i915_gem_active last_fence;
100 * Support different GGTT views into the same object.
101 * This means there can be multiple VMA mappings per object and per VM.
102 * i915_ggtt_view_type is used to distinguish between those entries.
103 * The default one of zero (I915_GGTT_VIEW_NORMAL) is default and also
104 * assumed in GEM functions which take no ggtt view parameter.
106 struct i915_ggtt_view ggtt_view;
108 /** This object's place on the active/inactive lists */
109 struct list_head vm_link;
111 struct list_head obj_link; /* Link in the object's VMA list */
112 struct rb_node obj_node;
113 struct hlist_node obj_hash;
115 /** This vma's place in the execbuf reservation list */
116 struct list_head exec_link;
117 struct list_head reloc_link;
119 /** This vma's place in the eviction list */
120 struct list_head evict_link;
122 struct list_head closed_link;
125 * Used for performing relocations during execbuffer insertion.
127 unsigned int *exec_flags;
128 struct hlist_node exec_node;
133 i915_vma_instance(struct drm_i915_gem_object *obj,
134 struct i915_address_space *vm,
135 const struct i915_ggtt_view *view);
137 void i915_vma_unpin_and_release(struct i915_vma **p_vma);
139 static inline bool i915_vma_is_ggtt(const struct i915_vma *vma)
141 return vma->flags & I915_VMA_GGTT;
144 static inline bool i915_vma_has_ggtt_write(const struct i915_vma *vma)
146 return vma->flags & I915_VMA_GGTT_WRITE;
149 static inline void i915_vma_set_ggtt_write(struct i915_vma *vma)
151 GEM_BUG_ON(!i915_vma_is_ggtt(vma));
152 vma->flags |= I915_VMA_GGTT_WRITE;
155 static inline void i915_vma_unset_ggtt_write(struct i915_vma *vma)
157 vma->flags &= ~I915_VMA_GGTT_WRITE;
160 void i915_vma_flush_writes(struct i915_vma *vma);
162 static inline bool i915_vma_is_map_and_fenceable(const struct i915_vma *vma)
164 return vma->flags & I915_VMA_CAN_FENCE;
167 static inline bool i915_vma_is_closed(const struct i915_vma *vma)
169 return vma->flags & I915_VMA_CLOSED;
172 static inline bool i915_vma_set_userfault(struct i915_vma *vma)
174 GEM_BUG_ON(!i915_vma_is_map_and_fenceable(vma));
175 return __test_and_set_bit(I915_VMA_USERFAULT_BIT, &vma->flags);
178 static inline void i915_vma_unset_userfault(struct i915_vma *vma)
180 return __clear_bit(I915_VMA_USERFAULT_BIT, &vma->flags);
183 static inline bool i915_vma_has_userfault(const struct i915_vma *vma)
185 return test_bit(I915_VMA_USERFAULT_BIT, &vma->flags);
188 static inline unsigned int i915_vma_get_active(const struct i915_vma *vma)
193 static inline bool i915_vma_is_active(const struct i915_vma *vma)
195 return i915_vma_get_active(vma);
198 static inline void i915_vma_set_active(struct i915_vma *vma,
201 vma->active |= BIT(engine);
204 static inline void i915_vma_clear_active(struct i915_vma *vma,
207 vma->active &= ~BIT(engine);
210 static inline bool i915_vma_has_active_engine(const struct i915_vma *vma,
213 return vma->active & BIT(engine);
216 static inline u32 i915_ggtt_offset(const struct i915_vma *vma)
218 GEM_BUG_ON(!i915_vma_is_ggtt(vma));
219 GEM_BUG_ON(!vma->node.allocated);
220 GEM_BUG_ON(upper_32_bits(vma->node.start));
221 GEM_BUG_ON(upper_32_bits(vma->node.start + vma->node.size - 1));
222 return lower_32_bits(vma->node.start);
225 static inline struct i915_vma *i915_vma_get(struct i915_vma *vma)
227 i915_gem_object_get(vma->obj);
231 static inline void i915_vma_put(struct i915_vma *vma)
233 i915_gem_object_put(vma->obj);
236 static __always_inline ptrdiff_t ptrdiff(const void *a, const void *b)
242 i915_vma_compare(struct i915_vma *vma,
243 struct i915_address_space *vm,
244 const struct i915_ggtt_view *view)
248 GEM_BUG_ON(view && !i915_is_ggtt(vm));
250 cmp = ptrdiff(vma->vm, vm);
254 BUILD_BUG_ON(I915_GGTT_VIEW_NORMAL != 0);
255 cmp = vma->ggtt_view.type;
263 /* ggtt_view.type also encodes its size so that we both distinguish
264 * different views using it as a "type" and also use a compact (no
265 * accessing of uninitialised padding bytes) memcmp without storing
266 * an extra parameter or adding more code.
268 * To ensure that the memcmp is valid for all branches of the union,
269 * even though the code looks like it is just comparing one branch,
270 * we assert above that all branches have the same address, and that
271 * each branch has a unique type/size.
273 BUILD_BUG_ON(I915_GGTT_VIEW_NORMAL >= I915_GGTT_VIEW_PARTIAL);
274 BUILD_BUG_ON(I915_GGTT_VIEW_PARTIAL >= I915_GGTT_VIEW_ROTATED);
275 BUILD_BUG_ON(offsetof(typeof(*view), rotated) !=
276 offsetof(typeof(*view), partial));
277 return memcmp(&vma->ggtt_view.partial, &view->partial, view->type);
280 int i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
282 bool i915_gem_valid_gtt_space(struct i915_vma *vma, unsigned long cache_level);
283 bool i915_vma_misplaced(const struct i915_vma *vma,
284 u64 size, u64 alignment, u64 flags);
285 void __i915_vma_set_map_and_fenceable(struct i915_vma *vma);
286 void i915_vma_revoke_mmap(struct i915_vma *vma);
287 int __must_check i915_vma_unbind(struct i915_vma *vma);
288 void i915_vma_unlink_ctx(struct i915_vma *vma);
289 void i915_vma_close(struct i915_vma *vma);
290 void i915_vma_reopen(struct i915_vma *vma);
291 void i915_vma_destroy(struct i915_vma *vma);
293 int __i915_vma_do_pin(struct i915_vma *vma,
294 u64 size, u64 alignment, u64 flags);
295 static inline int __must_check
296 i915_vma_pin(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
298 BUILD_BUG_ON(PIN_MBZ != I915_VMA_PIN_OVERFLOW);
299 BUILD_BUG_ON(PIN_GLOBAL != I915_VMA_GLOBAL_BIND);
300 BUILD_BUG_ON(PIN_USER != I915_VMA_LOCAL_BIND);
302 /* Pin early to prevent the shrinker/eviction logic from destroying
303 * our vma as we insert and bind.
305 if (likely(((++vma->flags ^ flags) & I915_VMA_BIND_MASK) == 0)) {
306 GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
307 GEM_BUG_ON(i915_vma_misplaced(vma, size, alignment, flags));
311 return __i915_vma_do_pin(vma, size, alignment, flags);
314 static inline int i915_vma_pin_count(const struct i915_vma *vma)
316 return vma->flags & I915_VMA_PIN_MASK;
319 static inline bool i915_vma_is_pinned(const struct i915_vma *vma)
321 return i915_vma_pin_count(vma);
324 static inline void __i915_vma_pin(struct i915_vma *vma)
327 GEM_BUG_ON(vma->flags & I915_VMA_PIN_OVERFLOW);
330 static inline void __i915_vma_unpin(struct i915_vma *vma)
335 static inline void i915_vma_unpin(struct i915_vma *vma)
337 GEM_BUG_ON(!i915_vma_is_pinned(vma));
338 GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
339 __i915_vma_unpin(vma);
343 * i915_vma_pin_iomap - calls ioremap_wc to map the GGTT VMA via the aperture
346 * The passed in VMA has to be pinned in the global GTT mappable region.
347 * An extra pinning of the VMA is acquired for the return iomapping,
348 * the caller must call i915_vma_unpin_iomap to relinquish the pinning
349 * after the iomapping is no longer required.
351 * Callers must hold the struct_mutex.
353 * Returns a valid iomapped pointer or ERR_PTR.
355 void __iomem *i915_vma_pin_iomap(struct i915_vma *vma);
356 #define IO_ERR_PTR(x) ((void __iomem *)ERR_PTR(x))
359 * i915_vma_unpin_iomap - unpins the mapping returned from i915_vma_iomap
362 * Unpins the previously iomapped VMA from i915_vma_pin_iomap().
364 * Callers must hold the struct_mutex. This function is only valid to be
365 * called on a VMA previously iomapped by the caller with i915_vma_pin_iomap().
367 void i915_vma_unpin_iomap(struct i915_vma *vma);
369 static inline struct page *i915_vma_first_page(struct i915_vma *vma)
371 GEM_BUG_ON(!vma->pages);
372 return sg_page(vma->pages->sgl);
376 * i915_vma_pin_fence - pin fencing state
377 * @vma: vma to pin fencing for
379 * This pins the fencing state (whether tiled or untiled) to make sure the
380 * vma (and its object) is ready to be used as a scanout target. Fencing
381 * status must be synchronize first by calling i915_vma_get_fence():
383 * The resulting fence pin reference must be released again with
384 * i915_vma_unpin_fence().
388 * True if the vma has a fence, false otherwise.
390 int i915_vma_pin_fence(struct i915_vma *vma);
391 int __must_check i915_vma_put_fence(struct i915_vma *vma);
393 static inline void __i915_vma_unpin_fence(struct i915_vma *vma)
395 GEM_BUG_ON(vma->fence->pin_count <= 0);
396 vma->fence->pin_count--;
400 * i915_vma_unpin_fence - unpin fencing state
401 * @vma: vma to unpin fencing for
403 * This releases the fence pin reference acquired through
404 * i915_vma_pin_fence. It will handle both objects with and without an
405 * attached fence correctly, callers do not need to distinguish this.
408 i915_vma_unpin_fence(struct i915_vma *vma)
410 lockdep_assert_held(&vma->obj->base.dev->struct_mutex);
412 __i915_vma_unpin_fence(vma);
415 void i915_vma_parked(struct drm_i915_private *i915);
417 #define for_each_until(cond) if (cond) break; else
420 * for_each_ggtt_vma - Iterate over the GGTT VMA belonging to an object.
421 * @V: the #i915_vma iterator
422 * @OBJ: the #drm_i915_gem_object
424 * GGTT VMA are placed at the being of the object's vma_list, see
425 * vma_create(), so we can stop our walk as soon as we see a ppgtt VMA,
426 * or the list is empty ofc.
428 #define for_each_ggtt_vma(V, OBJ) \
429 list_for_each_entry(V, &(OBJ)->vma_list, obj_link) \
430 for_each_until(!i915_vma_is_ggtt(V))