2 * Copyright (c) 2008 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
24 * Eric Anholt <eric@anholt.net>
25 * Keith Packard <keithp@keithp.com>
26 * Mika Kuoppala <mika.kuoppala@intel.com>
30 #include <linux/ascii85.h>
31 #include <linux/nmi.h>
32 #include <linux/pagevec.h>
33 #include <linux/scatterlist.h>
34 #include <linux/utsname.h>
35 #include <linux/zlib.h>
37 #include <drm/drm_print.h>
39 #include "display/intel_dmc.h"
40 #include "display/intel_overlay.h"
42 #include "gem/i915_gem_context.h"
43 #include "gem/i915_gem_lmem.h"
44 #include "gt/intel_gt.h"
45 #include "gt/intel_gt_pm.h"
48 #include "i915_gpu_error.h"
49 #include "i915_memcpy.h"
50 #include "i915_scatterlist.h"
52 #define ALLOW_FAIL (GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_NOWARN)
53 #define ATOMIC_MAYFAIL (GFP_ATOMIC | __GFP_NOWARN)
55 static void __sg_set_buf(struct scatterlist *sg,
56 void *addr, unsigned int len, loff_t it)
58 sg->page_link = (unsigned long)virt_to_page(addr);
59 sg->offset = offset_in_page(addr);
64 static bool __i915_error_grow(struct drm_i915_error_state_buf *e, size_t len)
69 if (e->bytes + len + 1 <= e->size)
73 __sg_set_buf(e->cur++, e->buf, e->bytes, e->iter);
79 if (e->cur == e->end) {
80 struct scatterlist *sgl;
82 sgl = (typeof(sgl))__get_free_page(ALLOW_FAIL);
92 (unsigned long)sgl | SG_CHAIN;
98 e->end = sgl + SG_MAX_SINGLE_ALLOC - 1;
101 e->size = ALIGN(len + 1, SZ_64K);
102 e->buf = kmalloc(e->size, ALLOW_FAIL);
104 e->size = PAGE_ALIGN(len + 1);
105 e->buf = kmalloc(e->size, GFP_KERNEL);
116 static void i915_error_vprintf(struct drm_i915_error_state_buf *e,
117 const char *fmt, va_list args)
126 len = vsnprintf(NULL, 0, fmt, ap);
133 if (!__i915_error_grow(e, len))
136 GEM_BUG_ON(e->bytes >= e->size);
137 len = vscnprintf(e->buf + e->bytes, e->size - e->bytes, fmt, args);
145 static void i915_error_puts(struct drm_i915_error_state_buf *e, const char *str)
153 if (!__i915_error_grow(e, len))
156 GEM_BUG_ON(e->bytes + len > e->size);
157 memcpy(e->buf + e->bytes, str, len);
161 #define err_printf(e, ...) i915_error_printf(e, __VA_ARGS__)
162 #define err_puts(e, s) i915_error_puts(e, s)
164 static void __i915_printfn_error(struct drm_printer *p, struct va_format *vaf)
166 i915_error_vprintf(p->arg, vaf->fmt, *vaf->va);
169 static inline struct drm_printer
170 i915_error_printer(struct drm_i915_error_state_buf *e)
172 struct drm_printer p = {
173 .printfn = __i915_printfn_error,
179 /* single threaded page allocator with a reserved stash for emergencies */
180 static void pool_fini(struct pagevec *pv)
185 static int pool_refill(struct pagevec *pv, gfp_t gfp)
187 while (pagevec_space(pv)) {
200 static int pool_init(struct pagevec *pv, gfp_t gfp)
206 err = pool_refill(pv, gfp);
213 static void *pool_alloc(struct pagevec *pv, gfp_t gfp)
218 if (!p && pagevec_count(pv))
219 p = pv->pages[--pv->nr];
221 return p ? page_address(p) : NULL;
224 static void pool_free(struct pagevec *pv, void *addr)
226 struct page *p = virt_to_page(addr);
228 if (pagevec_space(pv))
234 #ifdef CONFIG_DRM_I915_COMPRESS_ERROR
236 struct i915_vma_compress {
238 struct z_stream_s zstream;
242 static bool compress_init(struct i915_vma_compress *c)
244 struct z_stream_s *zstream = &c->zstream;
246 if (pool_init(&c->pool, ALLOW_FAIL))
250 kmalloc(zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL),
252 if (!zstream->workspace) {
258 if (i915_has_memcpy_from_wc())
259 c->tmp = pool_alloc(&c->pool, ALLOW_FAIL);
264 static bool compress_start(struct i915_vma_compress *c)
266 struct z_stream_s *zstream = &c->zstream;
267 void *workspace = zstream->workspace;
269 memset(zstream, 0, sizeof(*zstream));
270 zstream->workspace = workspace;
272 return zlib_deflateInit(zstream, Z_DEFAULT_COMPRESSION) == Z_OK;
275 static void *compress_next_page(struct i915_vma_compress *c,
276 struct i915_vma_coredump *dst)
280 if (dst->page_count >= dst->num_pages)
281 return ERR_PTR(-ENOSPC);
283 page = pool_alloc(&c->pool, ALLOW_FAIL);
285 return ERR_PTR(-ENOMEM);
287 return dst->pages[dst->page_count++] = page;
290 static int compress_page(struct i915_vma_compress *c,
292 struct i915_vma_coredump *dst,
295 struct z_stream_s *zstream = &c->zstream;
297 zstream->next_in = src;
298 if (wc && c->tmp && i915_memcpy_from_wc(c->tmp, src, PAGE_SIZE))
299 zstream->next_in = c->tmp;
300 zstream->avail_in = PAGE_SIZE;
303 if (zstream->avail_out == 0) {
304 zstream->next_out = compress_next_page(c, dst);
305 if (IS_ERR(zstream->next_out))
306 return PTR_ERR(zstream->next_out);
308 zstream->avail_out = PAGE_SIZE;
311 if (zlib_deflate(zstream, Z_NO_FLUSH) != Z_OK)
315 } while (zstream->avail_in);
317 /* Fallback to uncompressed if we increase size? */
318 if (0 && zstream->total_out > zstream->total_in)
324 static int compress_flush(struct i915_vma_compress *c,
325 struct i915_vma_coredump *dst)
327 struct z_stream_s *zstream = &c->zstream;
330 switch (zlib_deflate(zstream, Z_FINISH)) {
331 case Z_OK: /* more space requested */
332 zstream->next_out = compress_next_page(c, dst);
333 if (IS_ERR(zstream->next_out))
334 return PTR_ERR(zstream->next_out);
336 zstream->avail_out = PAGE_SIZE;
342 default: /* any error */
348 memset(zstream->next_out, 0, zstream->avail_out);
349 dst->unused = zstream->avail_out;
353 static void compress_finish(struct i915_vma_compress *c)
355 zlib_deflateEnd(&c->zstream);
358 static void compress_fini(struct i915_vma_compress *c)
360 kfree(c->zstream.workspace);
362 pool_free(&c->pool, c->tmp);
366 static void err_compression_marker(struct drm_i915_error_state_buf *m)
373 struct i915_vma_compress {
377 static bool compress_init(struct i915_vma_compress *c)
379 return pool_init(&c->pool, ALLOW_FAIL) == 0;
382 static bool compress_start(struct i915_vma_compress *c)
387 static int compress_page(struct i915_vma_compress *c,
389 struct i915_vma_coredump *dst,
394 ptr = pool_alloc(&c->pool, ALLOW_FAIL);
398 if (!(wc && i915_memcpy_from_wc(ptr, src, PAGE_SIZE)))
399 memcpy(ptr, src, PAGE_SIZE);
400 dst->pages[dst->page_count++] = ptr;
406 static int compress_flush(struct i915_vma_compress *c,
407 struct i915_vma_coredump *dst)
412 static void compress_finish(struct i915_vma_compress *c)
416 static void compress_fini(struct i915_vma_compress *c)
421 static void err_compression_marker(struct drm_i915_error_state_buf *m)
428 static void error_print_instdone(struct drm_i915_error_state_buf *m,
429 const struct intel_engine_coredump *ee)
431 const struct sseu_dev_info *sseu = &ee->engine->gt->info.sseu;
435 err_printf(m, " INSTDONE: 0x%08x\n",
436 ee->instdone.instdone);
438 if (ee->engine->class != RENDER_CLASS || GRAPHICS_VER(m->i915) <= 3)
441 err_printf(m, " SC_INSTDONE: 0x%08x\n",
442 ee->instdone.slice_common);
444 if (GRAPHICS_VER(m->i915) <= 6)
447 for_each_instdone_slice_subslice(m->i915, sseu, slice, subslice)
448 err_printf(m, " SAMPLER_INSTDONE[%d][%d]: 0x%08x\n",
450 ee->instdone.sampler[slice][subslice]);
452 for_each_instdone_slice_subslice(m->i915, sseu, slice, subslice)
453 err_printf(m, " ROW_INSTDONE[%d][%d]: 0x%08x\n",
455 ee->instdone.row[slice][subslice]);
457 if (GRAPHICS_VER(m->i915) < 12)
460 err_printf(m, " SC_INSTDONE_EXTRA: 0x%08x\n",
461 ee->instdone.slice_common_extra[0]);
462 err_printf(m, " SC_INSTDONE_EXTRA2: 0x%08x\n",
463 ee->instdone.slice_common_extra[1]);
466 static void error_print_request(struct drm_i915_error_state_buf *m,
468 const struct i915_request_coredump *erq)
473 err_printf(m, "%s pid %d, seqno %8x:%08x%s%s, prio %d, head %08x, tail %08x\n",
474 prefix, erq->pid, erq->context, erq->seqno,
475 test_bit(DMA_FENCE_FLAG_SIGNALED_BIT,
476 &erq->flags) ? "!" : "",
477 test_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT,
478 &erq->flags) ? "+" : "",
479 erq->sched_attr.priority,
480 erq->head, erq->tail);
483 static void error_print_context(struct drm_i915_error_state_buf *m,
485 const struct i915_gem_context_coredump *ctx)
487 const u32 period = m->i915->gt.clock_period_ns;
489 err_printf(m, "%s%s[%d] prio %d, guilty %d active %d, runtime total %lluns, avg %lluns\n",
490 header, ctx->comm, ctx->pid, ctx->sched_attr.priority,
491 ctx->guilty, ctx->active,
492 ctx->total_runtime * period,
493 mul_u32_u32(ctx->avg_runtime, period));
496 static struct i915_vma_coredump *
497 __find_vma(struct i915_vma_coredump *vma, const char *name)
500 if (strcmp(vma->name, name) == 0)
508 static struct i915_vma_coredump *
509 find_batch(const struct intel_engine_coredump *ee)
511 return __find_vma(ee->vma, "batch");
514 static void error_print_engine(struct drm_i915_error_state_buf *m,
515 const struct intel_engine_coredump *ee)
517 struct i915_vma_coredump *batch;
520 err_printf(m, "%s command stream:\n", ee->engine->name);
521 err_printf(m, " CCID: 0x%08x\n", ee->ccid);
522 err_printf(m, " START: 0x%08x\n", ee->start);
523 err_printf(m, " HEAD: 0x%08x [0x%08x]\n", ee->head, ee->rq_head);
524 err_printf(m, " TAIL: 0x%08x [0x%08x, 0x%08x]\n",
525 ee->tail, ee->rq_post, ee->rq_tail);
526 err_printf(m, " CTL: 0x%08x\n", ee->ctl);
527 err_printf(m, " MODE: 0x%08x\n", ee->mode);
528 err_printf(m, " HWS: 0x%08x\n", ee->hws);
529 err_printf(m, " ACTHD: 0x%08x %08x\n",
530 (u32)(ee->acthd>>32), (u32)ee->acthd);
531 err_printf(m, " IPEIR: 0x%08x\n", ee->ipeir);
532 err_printf(m, " IPEHR: 0x%08x\n", ee->ipehr);
533 err_printf(m, " ESR: 0x%08x\n", ee->esr);
535 error_print_instdone(m, ee);
537 batch = find_batch(ee);
539 u64 start = batch->gtt_offset;
540 u64 end = start + batch->gtt_size;
542 err_printf(m, " batch: [0x%08x_%08x, 0x%08x_%08x]\n",
543 upper_32_bits(start), lower_32_bits(start),
544 upper_32_bits(end), lower_32_bits(end));
546 if (GRAPHICS_VER(m->i915) >= 4) {
547 err_printf(m, " BBADDR: 0x%08x_%08x\n",
548 (u32)(ee->bbaddr>>32), (u32)ee->bbaddr);
549 err_printf(m, " BB_STATE: 0x%08x\n", ee->bbstate);
550 err_printf(m, " INSTPS: 0x%08x\n", ee->instps);
552 err_printf(m, " INSTPM: 0x%08x\n", ee->instpm);
553 err_printf(m, " FADDR: 0x%08x %08x\n", upper_32_bits(ee->faddr),
554 lower_32_bits(ee->faddr));
555 if (GRAPHICS_VER(m->i915) >= 6) {
556 err_printf(m, " RC PSMI: 0x%08x\n", ee->rc_psmi);
557 err_printf(m, " FAULT_REG: 0x%08x\n", ee->fault_reg);
559 if (HAS_PPGTT(m->i915)) {
560 err_printf(m, " GFX_MODE: 0x%08x\n", ee->vm_info.gfx_mode);
562 if (GRAPHICS_VER(m->i915) >= 8) {
564 for (i = 0; i < 4; i++)
565 err_printf(m, " PDP%d: 0x%016llx\n",
566 i, ee->vm_info.pdp[i]);
568 err_printf(m, " PP_DIR_BASE: 0x%08x\n",
569 ee->vm_info.pp_dir_base);
572 err_printf(m, " hung: %u\n", ee->hung);
573 err_printf(m, " engine reset count: %u\n", ee->reset_count);
575 for (n = 0; n < ee->num_ports; n++) {
576 err_printf(m, " ELSP[%d]:", n);
577 error_print_request(m, " ", &ee->execlist[n]);
580 error_print_context(m, " Active context: ", &ee->context);
583 void i915_error_printf(struct drm_i915_error_state_buf *e, const char *f, ...)
588 i915_error_vprintf(e, f, args);
592 static void print_error_vma(struct drm_i915_error_state_buf *m,
593 const struct intel_engine_cs *engine,
594 const struct i915_vma_coredump *vma)
596 char out[ASCII85_BUFSZ];
602 err_printf(m, "%s --- %s = 0x%08x %08x\n",
603 engine ? engine->name : "global", vma->name,
604 upper_32_bits(vma->gtt_offset),
605 lower_32_bits(vma->gtt_offset));
607 if (vma->gtt_page_sizes > I915_GTT_PAGE_SIZE_4K)
608 err_printf(m, "gtt_page_sizes = 0x%08x\n", vma->gtt_page_sizes);
610 err_compression_marker(m);
611 for (page = 0; page < vma->page_count; page++) {
615 if (page == vma->page_count - 1)
617 len = ascii85_encode_len(len);
619 for (i = 0; i < len; i++)
620 err_puts(m, ascii85_encode(vma->pages[page][i], out));
625 static void err_print_capabilities(struct drm_i915_error_state_buf *m,
626 struct i915_gpu_coredump *error)
628 struct drm_printer p = i915_error_printer(m);
630 intel_device_info_print_static(&error->device_info, &p);
631 intel_device_info_print_runtime(&error->runtime_info, &p);
632 intel_driver_caps_print(&error->driver_caps, &p);
635 static void err_print_params(struct drm_i915_error_state_buf *m,
636 const struct i915_params *params)
638 struct drm_printer p = i915_error_printer(m);
640 i915_params_dump(params, &p);
643 static void err_print_pciid(struct drm_i915_error_state_buf *m,
644 struct drm_i915_private *i915)
646 struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
648 err_printf(m, "PCI ID: 0x%04x\n", pdev->device);
649 err_printf(m, "PCI Revision: 0x%02x\n", pdev->revision);
650 err_printf(m, "PCI Subsystem: %04x:%04x\n",
651 pdev->subsystem_vendor,
652 pdev->subsystem_device);
655 static void err_print_uc(struct drm_i915_error_state_buf *m,
656 const struct intel_uc_coredump *error_uc)
658 struct drm_printer p = i915_error_printer(m);
660 intel_uc_fw_dump(&error_uc->guc_fw, &p);
661 intel_uc_fw_dump(&error_uc->huc_fw, &p);
662 print_error_vma(m, NULL, error_uc->guc_log);
665 static void err_free_sgl(struct scatterlist *sgl)
668 struct scatterlist *sg;
670 for (sg = sgl; !sg_is_chain(sg); sg++) {
676 sg = sg_is_last(sg) ? NULL : sg_chain_ptr(sg);
677 free_page((unsigned long)sgl);
682 static void err_print_gt_info(struct drm_i915_error_state_buf *m,
683 struct intel_gt_coredump *gt)
685 struct drm_printer p = i915_error_printer(m);
687 intel_gt_info_print(>->info, &p);
688 intel_sseu_print_topology(>->info.sseu, &p);
691 static void err_print_gt(struct drm_i915_error_state_buf *m,
692 struct intel_gt_coredump *gt)
694 const struct intel_engine_coredump *ee;
697 err_printf(m, "GT awake: %s\n", yesno(gt->awake));
698 err_printf(m, "EIR: 0x%08x\n", gt->eir);
699 err_printf(m, "IER: 0x%08x\n", gt->ier);
700 for (i = 0; i < gt->ngtier; i++)
701 err_printf(m, "GTIER[%d]: 0x%08x\n", i, gt->gtier[i]);
702 err_printf(m, "PGTBL_ER: 0x%08x\n", gt->pgtbl_er);
703 err_printf(m, "FORCEWAKE: 0x%08x\n", gt->forcewake);
704 err_printf(m, "DERRMR: 0x%08x\n", gt->derrmr);
706 for (i = 0; i < gt->nfence; i++)
707 err_printf(m, " fence[%d] = %08llx\n", i, gt->fence[i]);
709 if (IS_GRAPHICS_VER(m->i915, 6, 11)) {
710 err_printf(m, "ERROR: 0x%08x\n", gt->error);
711 err_printf(m, "DONE_REG: 0x%08x\n", gt->done_reg);
714 if (GRAPHICS_VER(m->i915) >= 8)
715 err_printf(m, "FAULT_TLB_DATA: 0x%08x 0x%08x\n",
716 gt->fault_data1, gt->fault_data0);
718 if (GRAPHICS_VER(m->i915) == 7)
719 err_printf(m, "ERR_INT: 0x%08x\n", gt->err_int);
721 if (IS_GRAPHICS_VER(m->i915, 8, 11))
722 err_printf(m, "GTT_CACHE_EN: 0x%08x\n", gt->gtt_cache);
724 if (GRAPHICS_VER(m->i915) == 12)
725 err_printf(m, "AUX_ERR_DBG: 0x%08x\n", gt->aux_err);
727 if (GRAPHICS_VER(m->i915) >= 12) {
730 for (i = 0; i < GEN12_SFC_DONE_MAX; i++) {
732 * SFC_DONE resides in the VD forcewake domain, so it
733 * only exists if the corresponding VCS engine is
736 if (!HAS_ENGINE(gt->_gt, _VCS(i * 2)))
739 err_printf(m, " SFC_DONE[%d]: 0x%08x\n", i,
743 err_printf(m, " GAM_DONE: 0x%08x\n", gt->gam_done);
746 for (ee = gt->engine; ee; ee = ee->next) {
747 const struct i915_vma_coredump *vma;
749 error_print_engine(m, ee);
750 for (vma = ee->vma; vma; vma = vma->next)
751 print_error_vma(m, ee->engine, vma);
755 err_print_uc(m, gt->uc);
757 err_print_gt_info(m, gt);
760 static void __err_print_to_sgl(struct drm_i915_error_state_buf *m,
761 struct i915_gpu_coredump *error)
763 const struct intel_engine_coredump *ee;
764 struct timespec64 ts;
766 if (*error->error_msg)
767 err_printf(m, "%s\n", error->error_msg);
768 err_printf(m, "Kernel: %s %s\n",
769 init_utsname()->release,
770 init_utsname()->machine);
771 err_printf(m, "Driver: %s\n", DRIVER_DATE);
772 ts = ktime_to_timespec64(error->time);
773 err_printf(m, "Time: %lld s %ld us\n",
774 (s64)ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC);
775 ts = ktime_to_timespec64(error->boottime);
776 err_printf(m, "Boottime: %lld s %ld us\n",
777 (s64)ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC);
778 ts = ktime_to_timespec64(error->uptime);
779 err_printf(m, "Uptime: %lld s %ld us\n",
780 (s64)ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC);
781 err_printf(m, "Capture: %lu jiffies; %d ms ago\n",
782 error->capture, jiffies_to_msecs(jiffies - error->capture));
784 for (ee = error->gt ? error->gt->engine : NULL; ee; ee = ee->next)
785 err_printf(m, "Active process (on ring %s): %s [%d]\n",
790 err_printf(m, "Reset count: %u\n", error->reset_count);
791 err_printf(m, "Suspend count: %u\n", error->suspend_count);
792 err_printf(m, "Platform: %s\n", intel_platform_name(error->device_info.platform));
793 err_printf(m, "Subplatform: 0x%x\n",
794 intel_subplatform(&error->runtime_info,
795 error->device_info.platform));
796 err_print_pciid(m, m->i915);
798 err_printf(m, "IOMMU enabled?: %d\n", error->iommu);
800 if (HAS_DMC(m->i915)) {
801 struct intel_dmc *dmc = &m->i915->dmc;
803 err_printf(m, "DMC loaded: %s\n",
804 yesno(intel_dmc_has_payload(m->i915) != 0));
805 err_printf(m, "DMC fw version: %d.%d\n",
806 DMC_VERSION_MAJOR(dmc->version),
807 DMC_VERSION_MINOR(dmc->version));
810 err_printf(m, "RPM wakelock: %s\n", yesno(error->wakelock));
811 err_printf(m, "PM suspended: %s\n", yesno(error->suspended));
814 err_print_gt(m, error->gt);
817 intel_overlay_print_error_state(m, error->overlay);
819 err_print_capabilities(m, error);
820 err_print_params(m, &error->params);
823 static int err_print_to_sgl(struct i915_gpu_coredump *error)
825 struct drm_i915_error_state_buf m;
828 return PTR_ERR(error);
830 if (READ_ONCE(error->sgl))
833 memset(&m, 0, sizeof(m));
834 m.i915 = error->i915;
836 __err_print_to_sgl(&m, error);
839 __sg_set_buf(m.cur++, m.buf, m.bytes, m.iter);
844 GEM_BUG_ON(m.end < m.cur);
845 sg_mark_end(m.cur - 1);
847 GEM_BUG_ON(m.sgl && !m.cur);
854 if (cmpxchg(&error->sgl, NULL, m.sgl))
860 ssize_t i915_gpu_coredump_copy_to_buffer(struct i915_gpu_coredump *error,
861 char *buf, loff_t off, size_t rem)
863 struct scatterlist *sg;
871 err = err_print_to_sgl(error);
875 sg = READ_ONCE(error->fit);
876 if (!sg || off < sg->dma_address)
881 pos = sg->dma_address;
886 if (sg_is_chain(sg)) {
887 sg = sg_chain_ptr(sg);
888 GEM_BUG_ON(sg_is_chain(sg));
892 if (pos + len <= off) {
899 GEM_BUG_ON(off - pos > len);
906 GEM_BUG_ON(!len || len > sg->length);
908 memcpy(buf, page_address(sg_page(sg)) + start, len);
916 WRITE_ONCE(error->fit, sg);
919 } while (!sg_is_last(sg++));
924 static void i915_vma_coredump_free(struct i915_vma_coredump *vma)
927 struct i915_vma_coredump *next = vma->next;
930 for (page = 0; page < vma->page_count; page++)
931 free_page((unsigned long)vma->pages[page]);
938 static void cleanup_params(struct i915_gpu_coredump *error)
940 i915_params_free(&error->params);
943 static void cleanup_uc(struct intel_uc_coredump *uc)
945 kfree(uc->guc_fw.path);
946 kfree(uc->huc_fw.path);
947 i915_vma_coredump_free(uc->guc_log);
952 static void cleanup_gt(struct intel_gt_coredump *gt)
955 struct intel_engine_coredump *ee = gt->engine;
957 gt->engine = ee->next;
959 i915_vma_coredump_free(ee->vma);
969 void __i915_gpu_coredump_free(struct kref *error_ref)
971 struct i915_gpu_coredump *error =
972 container_of(error_ref, typeof(*error), ref);
975 struct intel_gt_coredump *gt = error->gt;
977 error->gt = gt->next;
981 kfree(error->overlay);
983 cleanup_params(error);
985 err_free_sgl(error->sgl);
989 static struct i915_vma_coredump *
990 i915_vma_coredump_create(const struct intel_gt *gt,
991 const struct i915_vma *vma,
993 struct i915_vma_compress *compress)
995 struct i915_ggtt *ggtt = gt->ggtt;
996 const u64 slot = ggtt->error_capture.start;
997 struct i915_vma_coredump *dst;
998 unsigned long num_pages;
999 struct sgt_iter iter;
1004 if (!vma || !vma->pages || !compress)
1007 num_pages = min_t(u64, vma->size, vma->obj->base.size) >> PAGE_SHIFT;
1008 num_pages = DIV_ROUND_UP(10 * num_pages, 8); /* worstcase zlib growth */
1009 dst = kmalloc(sizeof(*dst) + num_pages * sizeof(u32 *), ALLOW_FAIL);
1013 if (!compress_start(compress)) {
1018 strcpy(dst->name, name);
1021 dst->gtt_offset = vma->node.start;
1022 dst->gtt_size = vma->node.size;
1023 dst->gtt_page_sizes = vma->page_sizes.gtt;
1024 dst->num_pages = num_pages;
1025 dst->page_count = 0;
1029 if (drm_mm_node_allocated(&ggtt->error_capture)) {
1033 for_each_sgt_daddr(dma, iter, vma->pages) {
1034 mutex_lock(&ggtt->error_mutex);
1035 ggtt->vm.insert_page(&ggtt->vm, dma, slot,
1036 I915_CACHE_NONE, 0);
1039 s = io_mapping_map_wc(&ggtt->iomap, slot, PAGE_SIZE);
1040 ret = compress_page(compress,
1041 (void __force *)s, dst,
1043 io_mapping_unmap(s);
1046 ggtt->vm.clear_range(&ggtt->vm, slot, PAGE_SIZE);
1047 mutex_unlock(&ggtt->error_mutex);
1051 } else if (__i915_gem_object_is_lmem(vma->obj)) {
1052 struct intel_memory_region *mem = vma->obj->mm.region;
1055 for_each_sgt_daddr(dma, iter, vma->pages) {
1058 s = io_mapping_map_wc(&mem->iomap,
1059 dma - mem->region.start,
1061 ret = compress_page(compress,
1062 (void __force *)s, dst,
1064 io_mapping_unmap(s);
1071 for_each_sgt_page(page, iter, vma->pages) {
1074 drm_clflush_pages(&page, 1);
1077 ret = compress_page(compress, s, dst, false);
1080 drm_clflush_pages(&page, 1);
1087 if (ret || compress_flush(compress, dst)) {
1088 while (dst->page_count--)
1089 pool_free(&compress->pool, dst->pages[dst->page_count]);
1093 compress_finish(compress);
1098 static void gt_record_fences(struct intel_gt_coredump *gt)
1100 struct i915_ggtt *ggtt = gt->_gt->ggtt;
1101 struct intel_uncore *uncore = gt->_gt->uncore;
1104 if (GRAPHICS_VER(uncore->i915) >= 6) {
1105 for (i = 0; i < ggtt->num_fences; i++)
1107 intel_uncore_read64(uncore,
1108 FENCE_REG_GEN6_LO(i));
1109 } else if (GRAPHICS_VER(uncore->i915) >= 4) {
1110 for (i = 0; i < ggtt->num_fences; i++)
1112 intel_uncore_read64(uncore,
1113 FENCE_REG_965_LO(i));
1115 for (i = 0; i < ggtt->num_fences; i++)
1117 intel_uncore_read(uncore, FENCE_REG(i));
1122 static void engine_record_registers(struct intel_engine_coredump *ee)
1124 const struct intel_engine_cs *engine = ee->engine;
1125 struct drm_i915_private *i915 = engine->i915;
1127 if (GRAPHICS_VER(i915) >= 6) {
1128 ee->rc_psmi = ENGINE_READ(engine, RING_PSMI_CTL);
1130 if (GRAPHICS_VER(i915) >= 12)
1131 ee->fault_reg = intel_uncore_read(engine->uncore,
1132 GEN12_RING_FAULT_REG);
1133 else if (GRAPHICS_VER(i915) >= 8)
1134 ee->fault_reg = intel_uncore_read(engine->uncore,
1135 GEN8_RING_FAULT_REG);
1137 ee->fault_reg = GEN6_RING_FAULT_REG_READ(engine);
1140 if (GRAPHICS_VER(i915) >= 4) {
1141 ee->esr = ENGINE_READ(engine, RING_ESR);
1142 ee->faddr = ENGINE_READ(engine, RING_DMA_FADD);
1143 ee->ipeir = ENGINE_READ(engine, RING_IPEIR);
1144 ee->ipehr = ENGINE_READ(engine, RING_IPEHR);
1145 ee->instps = ENGINE_READ(engine, RING_INSTPS);
1146 ee->bbaddr = ENGINE_READ(engine, RING_BBADDR);
1147 ee->ccid = ENGINE_READ(engine, CCID);
1148 if (GRAPHICS_VER(i915) >= 8) {
1149 ee->faddr |= (u64)ENGINE_READ(engine, RING_DMA_FADD_UDW) << 32;
1150 ee->bbaddr |= (u64)ENGINE_READ(engine, RING_BBADDR_UDW) << 32;
1152 ee->bbstate = ENGINE_READ(engine, RING_BBSTATE);
1154 ee->faddr = ENGINE_READ(engine, DMA_FADD_I8XX);
1155 ee->ipeir = ENGINE_READ(engine, IPEIR);
1156 ee->ipehr = ENGINE_READ(engine, IPEHR);
1159 intel_engine_get_instdone(engine, &ee->instdone);
1161 ee->instpm = ENGINE_READ(engine, RING_INSTPM);
1162 ee->acthd = intel_engine_get_active_head(engine);
1163 ee->start = ENGINE_READ(engine, RING_START);
1164 ee->head = ENGINE_READ(engine, RING_HEAD);
1165 ee->tail = ENGINE_READ(engine, RING_TAIL);
1166 ee->ctl = ENGINE_READ(engine, RING_CTL);
1167 if (GRAPHICS_VER(i915) > 2)
1168 ee->mode = ENGINE_READ(engine, RING_MI_MODE);
1170 if (!HWS_NEEDS_PHYSICAL(i915)) {
1173 if (GRAPHICS_VER(i915) == 7) {
1174 switch (engine->id) {
1176 MISSING_CASE(engine->id);
1179 mmio = RENDER_HWS_PGA_GEN7;
1182 mmio = BLT_HWS_PGA_GEN7;
1185 mmio = BSD_HWS_PGA_GEN7;
1188 mmio = VEBOX_HWS_PGA_GEN7;
1191 } else if (GRAPHICS_VER(engine->i915) == 6) {
1192 mmio = RING_HWS_PGA_GEN6(engine->mmio_base);
1194 /* XXX: gen8 returns to sanity */
1195 mmio = RING_HWS_PGA(engine->mmio_base);
1198 ee->hws = intel_uncore_read(engine->uncore, mmio);
1201 ee->reset_count = i915_reset_engine_count(&i915->gpu_error, engine);
1203 if (HAS_PPGTT(i915)) {
1206 ee->vm_info.gfx_mode = ENGINE_READ(engine, RING_MODE_GEN7);
1208 if (GRAPHICS_VER(i915) == 6) {
1209 ee->vm_info.pp_dir_base =
1210 ENGINE_READ(engine, RING_PP_DIR_BASE_READ);
1211 } else if (GRAPHICS_VER(i915) == 7) {
1212 ee->vm_info.pp_dir_base =
1213 ENGINE_READ(engine, RING_PP_DIR_BASE);
1214 } else if (GRAPHICS_VER(i915) >= 8) {
1215 u32 base = engine->mmio_base;
1217 for (i = 0; i < 4; i++) {
1218 ee->vm_info.pdp[i] =
1219 intel_uncore_read(engine->uncore,
1220 GEN8_RING_PDP_UDW(base, i));
1221 ee->vm_info.pdp[i] <<= 32;
1222 ee->vm_info.pdp[i] |=
1223 intel_uncore_read(engine->uncore,
1224 GEN8_RING_PDP_LDW(base, i));
1230 static void record_request(const struct i915_request *request,
1231 struct i915_request_coredump *erq)
1233 erq->flags = request->fence.flags;
1234 erq->context = request->fence.context;
1235 erq->seqno = request->fence.seqno;
1236 erq->sched_attr = request->sched.attr;
1237 erq->head = request->head;
1238 erq->tail = request->tail;
1242 if (!intel_context_is_closed(request->context)) {
1243 const struct i915_gem_context *ctx;
1245 ctx = rcu_dereference(request->context->gem_context);
1247 erq->pid = pid_nr(ctx->pid);
1252 static void engine_record_execlists(struct intel_engine_coredump *ee)
1254 const struct intel_engine_execlists * const el = &ee->engine->execlists;
1255 struct i915_request * const *port = el->active;
1259 record_request(*port++, &ee->execlist[n++]);
1264 static bool record_context(struct i915_gem_context_coredump *e,
1265 const struct i915_request *rq)
1267 struct i915_gem_context *ctx;
1268 struct task_struct *task;
1272 ctx = rcu_dereference(rq->context->gem_context);
1273 if (ctx && !kref_get_unless_zero(&ctx->ref))
1280 task = pid_task(ctx->pid, PIDTYPE_PID);
1282 strcpy(e->comm, task->comm);
1287 e->sched_attr = ctx->sched;
1288 e->guilty = atomic_read(&ctx->guilty_count);
1289 e->active = atomic_read(&ctx->active_count);
1291 e->total_runtime = rq->context->runtime.total;
1292 e->avg_runtime = ewma_runtime_read(&rq->context->runtime.avg);
1294 simulated = i915_gem_context_no_error_capture(ctx);
1296 i915_gem_context_put(ctx);
1300 struct intel_engine_capture_vma {
1301 struct intel_engine_capture_vma *next;
1302 struct i915_vma *vma;
1306 static struct intel_engine_capture_vma *
1307 capture_vma(struct intel_engine_capture_vma *next,
1308 struct i915_vma *vma,
1312 struct intel_engine_capture_vma *c;
1317 c = kmalloc(sizeof(*c), gfp);
1321 if (!i915_active_acquire_if_busy(&vma->active)) {
1326 strcpy(c->name, name);
1327 c->vma = vma; /* reference held while active */
1333 static struct intel_engine_capture_vma *
1334 capture_user(struct intel_engine_capture_vma *capture,
1335 const struct i915_request *rq,
1338 struct i915_capture_list *c;
1340 for (c = rq->capture_list; c; c = c->next)
1341 capture = capture_vma(capture, c->vma, "user", gfp);
1346 static void add_vma(struct intel_engine_coredump *ee,
1347 struct i915_vma_coredump *vma)
1350 vma->next = ee->vma;
1355 struct intel_engine_coredump *
1356 intel_engine_coredump_alloc(struct intel_engine_cs *engine, gfp_t gfp)
1358 struct intel_engine_coredump *ee;
1360 ee = kzalloc(sizeof(*ee), gfp);
1364 ee->engine = engine;
1366 engine_record_registers(ee);
1367 engine_record_execlists(ee);
1372 struct intel_engine_capture_vma *
1373 intel_engine_coredump_add_request(struct intel_engine_coredump *ee,
1374 struct i915_request *rq,
1377 struct intel_engine_capture_vma *vma = NULL;
1379 ee->simulated |= record_context(&ee->context, rq);
1384 * We need to copy these to an anonymous buffer
1385 * as the simplest method to avoid being overwritten
1388 vma = capture_vma(vma, rq->batch, "batch", gfp);
1389 vma = capture_user(vma, rq, gfp);
1390 vma = capture_vma(vma, rq->ring->vma, "ring", gfp);
1391 vma = capture_vma(vma, rq->context->state, "HW context", gfp);
1393 ee->rq_head = rq->head;
1394 ee->rq_post = rq->postfix;
1395 ee->rq_tail = rq->tail;
1401 intel_engine_coredump_add_vma(struct intel_engine_coredump *ee,
1402 struct intel_engine_capture_vma *capture,
1403 struct i915_vma_compress *compress)
1405 const struct intel_engine_cs *engine = ee->engine;
1408 struct intel_engine_capture_vma *this = capture;
1409 struct i915_vma *vma = this->vma;
1412 i915_vma_coredump_create(engine->gt,
1416 i915_active_release(&vma->active);
1418 capture = this->next;
1423 i915_vma_coredump_create(engine->gt,
1424 engine->status_page.vma,
1429 i915_vma_coredump_create(engine->gt,
1435 static struct intel_engine_coredump *
1436 capture_engine(struct intel_engine_cs *engine,
1437 struct i915_vma_compress *compress)
1439 struct intel_engine_capture_vma *capture = NULL;
1440 struct intel_engine_coredump *ee;
1441 struct intel_context *ce;
1442 struct i915_request *rq = NULL;
1443 unsigned long flags;
1445 ee = intel_engine_coredump_alloc(engine, GFP_KERNEL);
1449 ce = intel_engine_get_hung_context(engine);
1451 intel_engine_clear_hung_context(engine);
1452 rq = intel_context_find_active_request(ce);
1453 if (!rq || !i915_request_started(rq))
1454 goto no_request_capture;
1457 * Getting here with GuC enabled means it is a forced error capture
1458 * with no actual hang. So, no need to attempt the execlist search.
1460 if (!intel_uc_uses_guc_submission(&engine->gt->uc)) {
1461 spin_lock_irqsave(&engine->sched_engine->lock, flags);
1462 rq = intel_engine_execlist_find_hung_request(engine);
1463 spin_unlock_irqrestore(&engine->sched_engine->lock,
1468 capture = intel_engine_coredump_add_request(ee, rq,
1476 intel_engine_coredump_add_vma(ee, capture, compress);
1482 gt_record_engines(struct intel_gt_coredump *gt,
1483 intel_engine_mask_t engine_mask,
1484 struct i915_vma_compress *compress)
1486 struct intel_engine_cs *engine;
1487 enum intel_engine_id id;
1489 for_each_engine(engine, gt->_gt, id) {
1490 struct intel_engine_coredump *ee;
1492 /* Refill our page pool before entering atomic section */
1493 pool_refill(&compress->pool, ALLOW_FAIL);
1495 ee = capture_engine(engine, compress);
1499 ee->hung = engine->mask & engine_mask;
1501 gt->simulated |= ee->simulated;
1502 if (ee->simulated) {
1507 ee->next = gt->engine;
1512 static struct intel_uc_coredump *
1513 gt_record_uc(struct intel_gt_coredump *gt,
1514 struct i915_vma_compress *compress)
1516 const struct intel_uc *uc = >->_gt->uc;
1517 struct intel_uc_coredump *error_uc;
1519 error_uc = kzalloc(sizeof(*error_uc), ALLOW_FAIL);
1523 memcpy(&error_uc->guc_fw, &uc->guc.fw, sizeof(uc->guc.fw));
1524 memcpy(&error_uc->huc_fw, &uc->huc.fw, sizeof(uc->huc.fw));
1526 /* Non-default firmware paths will be specified by the modparam.
1527 * As modparams are generally accesible from the userspace make
1528 * explicit copies of the firmware paths.
1530 error_uc->guc_fw.path = kstrdup(uc->guc.fw.path, ALLOW_FAIL);
1531 error_uc->huc_fw.path = kstrdup(uc->huc.fw.path, ALLOW_FAIL);
1533 i915_vma_coredump_create(gt->_gt,
1534 uc->guc.log.vma, "GuC log buffer",
1540 /* Capture all registers which don't fit into another category. */
1541 static void gt_record_regs(struct intel_gt_coredump *gt)
1543 struct intel_uncore *uncore = gt->_gt->uncore;
1544 struct drm_i915_private *i915 = uncore->i915;
1548 * General organization
1549 * 1. Registers specific to a single generation
1550 * 2. Registers which belong to multiple generations
1551 * 3. Feature specific registers.
1552 * 4. Everything else
1553 * Please try to follow the order.
1556 /* 1: Registers specific to a single generation */
1557 if (IS_VALLEYVIEW(i915)) {
1558 gt->gtier[0] = intel_uncore_read(uncore, GTIER);
1559 gt->ier = intel_uncore_read(uncore, VLV_IER);
1560 gt->forcewake = intel_uncore_read_fw(uncore, FORCEWAKE_VLV);
1563 if (GRAPHICS_VER(i915) == 7)
1564 gt->err_int = intel_uncore_read(uncore, GEN7_ERR_INT);
1566 if (GRAPHICS_VER(i915) >= 12) {
1567 gt->fault_data0 = intel_uncore_read(uncore,
1568 GEN12_FAULT_TLB_DATA0);
1569 gt->fault_data1 = intel_uncore_read(uncore,
1570 GEN12_FAULT_TLB_DATA1);
1571 } else if (GRAPHICS_VER(i915) >= 8) {
1572 gt->fault_data0 = intel_uncore_read(uncore,
1573 GEN8_FAULT_TLB_DATA0);
1574 gt->fault_data1 = intel_uncore_read(uncore,
1575 GEN8_FAULT_TLB_DATA1);
1578 if (GRAPHICS_VER(i915) == 6) {
1579 gt->forcewake = intel_uncore_read_fw(uncore, FORCEWAKE);
1580 gt->gab_ctl = intel_uncore_read(uncore, GAB_CTL);
1581 gt->gfx_mode = intel_uncore_read(uncore, GFX_MODE);
1584 /* 2: Registers which belong to multiple generations */
1585 if (GRAPHICS_VER(i915) >= 7)
1586 gt->forcewake = intel_uncore_read_fw(uncore, FORCEWAKE_MT);
1588 if (GRAPHICS_VER(i915) >= 6) {
1589 gt->derrmr = intel_uncore_read(uncore, DERRMR);
1590 if (GRAPHICS_VER(i915) < 12) {
1591 gt->error = intel_uncore_read(uncore, ERROR_GEN6);
1592 gt->done_reg = intel_uncore_read(uncore, DONE_REG);
1596 /* 3: Feature specific registers */
1597 if (IS_GRAPHICS_VER(i915, 6, 7)) {
1598 gt->gam_ecochk = intel_uncore_read(uncore, GAM_ECOCHK);
1599 gt->gac_eco = intel_uncore_read(uncore, GAC_ECO_BITS);
1602 if (IS_GRAPHICS_VER(i915, 8, 11))
1603 gt->gtt_cache = intel_uncore_read(uncore, HSW_GTT_CACHE_EN);
1605 if (GRAPHICS_VER(i915) == 12)
1606 gt->aux_err = intel_uncore_read(uncore, GEN12_AUX_ERR_DBG);
1608 if (GRAPHICS_VER(i915) >= 12) {
1609 for (i = 0; i < GEN12_SFC_DONE_MAX; i++) {
1611 * SFC_DONE resides in the VD forcewake domain, so it
1612 * only exists if the corresponding VCS engine is
1615 if (!HAS_ENGINE(gt->_gt, _VCS(i * 2)))
1619 intel_uncore_read(uncore, GEN12_SFC_DONE(i));
1622 gt->gam_done = intel_uncore_read(uncore, GEN12_GAM_DONE);
1625 /* 4: Everything else */
1626 if (GRAPHICS_VER(i915) >= 11) {
1627 gt->ier = intel_uncore_read(uncore, GEN8_DE_MISC_IER);
1629 intel_uncore_read(uncore,
1630 GEN11_RENDER_COPY_INTR_ENABLE);
1632 intel_uncore_read(uncore, GEN11_VCS_VECS_INTR_ENABLE);
1634 intel_uncore_read(uncore, GEN11_GUC_SG_INTR_ENABLE);
1636 intel_uncore_read(uncore,
1637 GEN11_GPM_WGBOXPERF_INTR_ENABLE);
1639 intel_uncore_read(uncore,
1640 GEN11_CRYPTO_RSVD_INTR_ENABLE);
1642 intel_uncore_read(uncore,
1643 GEN11_GUNIT_CSME_INTR_ENABLE);
1645 } else if (GRAPHICS_VER(i915) >= 8) {
1646 gt->ier = intel_uncore_read(uncore, GEN8_DE_MISC_IER);
1647 for (i = 0; i < 4; i++)
1649 intel_uncore_read(uncore, GEN8_GT_IER(i));
1651 } else if (HAS_PCH_SPLIT(i915)) {
1652 gt->ier = intel_uncore_read(uncore, DEIER);
1653 gt->gtier[0] = intel_uncore_read(uncore, GTIER);
1655 } else if (GRAPHICS_VER(i915) == 2) {
1656 gt->ier = intel_uncore_read16(uncore, GEN2_IER);
1657 } else if (!IS_VALLEYVIEW(i915)) {
1658 gt->ier = intel_uncore_read(uncore, GEN2_IER);
1660 gt->eir = intel_uncore_read(uncore, EIR);
1661 gt->pgtbl_er = intel_uncore_read(uncore, PGTBL_ER);
1664 static void gt_record_info(struct intel_gt_coredump *gt)
1666 memcpy(>->info, >->_gt->info, sizeof(struct intel_gt_info));
1670 * Generate a semi-unique error code. The code is not meant to have meaning, The
1671 * code's only purpose is to try to prevent false duplicated bug reports by
1672 * grossly estimating a GPU error state.
1674 * TODO Ideally, hashing the batchbuffer would be a very nice way to determine
1675 * the hang if we could strip the GTT offset information from it.
1677 * It's only a small step better than a random number in its current form.
1679 static u32 generate_ecode(const struct intel_engine_coredump *ee)
1682 * IPEHR would be an ideal way to detect errors, as it's the gross
1683 * measure of "the command that hung." However, has some very common
1684 * synchronization commands which almost always appear in the case
1685 * strictly a client bug. Use instdone to differentiate those some.
1687 return ee ? ee->ipehr ^ ee->instdone.instdone : 0;
1690 static const char *error_msg(struct i915_gpu_coredump *error)
1692 struct intel_engine_coredump *first = NULL;
1693 unsigned int hung_classes = 0;
1694 struct intel_gt_coredump *gt;
1697 for (gt = error->gt; gt; gt = gt->next) {
1698 struct intel_engine_coredump *cs;
1700 for (cs = gt->engine; cs; cs = cs->next) {
1702 hung_classes |= BIT(cs->engine->uabi_class);
1709 len = scnprintf(error->error_msg, sizeof(error->error_msg),
1710 "GPU HANG: ecode %d:%x:%08x",
1711 GRAPHICS_VER(error->i915), hung_classes,
1712 generate_ecode(first));
1713 if (first && first->context.pid) {
1714 /* Just show the first executing process, more is confusing */
1715 len += scnprintf(error->error_msg + len,
1716 sizeof(error->error_msg) - len,
1718 first->context.comm, first->context.pid);
1721 return error->error_msg;
1724 static void capture_gen(struct i915_gpu_coredump *error)
1726 struct drm_i915_private *i915 = error->i915;
1728 error->wakelock = atomic_read(&i915->runtime_pm.wakeref_count);
1729 error->suspended = i915->runtime_pm.suspended;
1732 #ifdef CONFIG_INTEL_IOMMU
1733 error->iommu = intel_iommu_gfx_mapped;
1735 error->reset_count = i915_reset_count(&i915->gpu_error);
1736 error->suspend_count = i915->suspend_count;
1738 i915_params_copy(&error->params, &i915->params);
1739 memcpy(&error->device_info,
1741 sizeof(error->device_info));
1742 memcpy(&error->runtime_info,
1744 sizeof(error->runtime_info));
1745 error->driver_caps = i915->caps;
1748 struct i915_gpu_coredump *
1749 i915_gpu_coredump_alloc(struct drm_i915_private *i915, gfp_t gfp)
1751 struct i915_gpu_coredump *error;
1753 if (!i915->params.error_capture)
1756 error = kzalloc(sizeof(*error), gfp);
1760 kref_init(&error->ref);
1763 error->time = ktime_get_real();
1764 error->boottime = ktime_get_boottime();
1765 error->uptime = ktime_sub(ktime_get(), i915->gt.last_init_time);
1766 error->capture = jiffies;
1773 #define DAY_AS_SECONDS(x) (24 * 60 * 60 * (x))
1775 struct intel_gt_coredump *
1776 intel_gt_coredump_alloc(struct intel_gt *gt, gfp_t gfp)
1778 struct intel_gt_coredump *gc;
1780 gc = kzalloc(sizeof(*gc), gfp);
1785 gc->awake = intel_gt_pm_is_awake(gt);
1788 gt_record_fences(gc);
1793 struct i915_vma_compress *
1794 i915_vma_capture_prepare(struct intel_gt_coredump *gt)
1796 struct i915_vma_compress *compress;
1798 compress = kmalloc(sizeof(*compress), ALLOW_FAIL);
1802 if (!compress_init(compress)) {
1810 void i915_vma_capture_finish(struct intel_gt_coredump *gt,
1811 struct i915_vma_compress *compress)
1816 compress_fini(compress);
1820 struct i915_gpu_coredump *
1821 i915_gpu_coredump(struct intel_gt *gt, intel_engine_mask_t engine_mask)
1823 struct drm_i915_private *i915 = gt->i915;
1824 struct i915_gpu_coredump *error;
1826 /* Check if GPU capture has been disabled */
1827 error = READ_ONCE(i915->gpu_error.first_error);
1831 error = i915_gpu_coredump_alloc(i915, ALLOW_FAIL);
1833 return ERR_PTR(-ENOMEM);
1835 error->gt = intel_gt_coredump_alloc(gt, ALLOW_FAIL);
1837 struct i915_vma_compress *compress;
1839 compress = i915_vma_capture_prepare(error->gt);
1843 return ERR_PTR(-ENOMEM);
1846 gt_record_info(error->gt);
1847 gt_record_engines(error->gt, engine_mask, compress);
1849 if (INTEL_INFO(i915)->has_gt_uc)
1850 error->gt->uc = gt_record_uc(error->gt, compress);
1852 i915_vma_capture_finish(error->gt, compress);
1854 error->simulated |= error->gt->simulated;
1857 error->overlay = intel_overlay_capture_error_state(i915);
1862 void i915_error_state_store(struct i915_gpu_coredump *error)
1864 struct drm_i915_private *i915;
1867 if (IS_ERR_OR_NULL(error))
1871 drm_info(&i915->drm, "%s\n", error_msg(error));
1873 if (error->simulated ||
1874 cmpxchg(&i915->gpu_error.first_error, NULL, error))
1877 i915_gpu_coredump_get(error);
1879 if (!xchg(&warned, true) &&
1880 ktime_get_real_seconds() - DRIVER_TIMESTAMP < DAY_AS_SECONDS(180)) {
1881 pr_info("GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.\n");
1882 pr_info("Please file a _new_ bug report at https://gitlab.freedesktop.org/drm/intel/issues/new.\n");
1883 pr_info("Please see https://gitlab.freedesktop.org/drm/intel/-/wikis/How-to-file-i915-bugs for details.\n");
1884 pr_info("drm/i915 developers can then reassign to the right component if it's not a kernel issue.\n");
1885 pr_info("The GPU crash dump is required to analyze GPU hangs, so please always attach it.\n");
1886 pr_info("GPU crash dump saved to /sys/class/drm/card%d/error\n",
1887 i915->drm.primary->index);
1892 * i915_capture_error_state - capture an error record for later analysis
1893 * @gt: intel_gt which originated the hang
1894 * @engine_mask: hung engines
1897 * Should be called when an error is detected (either a hang or an error
1898 * interrupt) to capture error state from the time of the error. Fills
1899 * out a structure which becomes available in debugfs for user level tools
1902 void i915_capture_error_state(struct intel_gt *gt,
1903 intel_engine_mask_t engine_mask)
1905 struct i915_gpu_coredump *error;
1907 error = i915_gpu_coredump(gt, engine_mask);
1908 if (IS_ERR(error)) {
1909 cmpxchg(>->i915->gpu_error.first_error, NULL, error);
1913 i915_error_state_store(error);
1914 i915_gpu_coredump_put(error);
1917 struct i915_gpu_coredump *
1918 i915_first_error_state(struct drm_i915_private *i915)
1920 struct i915_gpu_coredump *error;
1922 spin_lock_irq(&i915->gpu_error.lock);
1923 error = i915->gpu_error.first_error;
1924 if (!IS_ERR_OR_NULL(error))
1925 i915_gpu_coredump_get(error);
1926 spin_unlock_irq(&i915->gpu_error.lock);
1931 void i915_reset_error_state(struct drm_i915_private *i915)
1933 struct i915_gpu_coredump *error;
1935 spin_lock_irq(&i915->gpu_error.lock);
1936 error = i915->gpu_error.first_error;
1937 if (error != ERR_PTR(-ENODEV)) /* if disabled, always disabled */
1938 i915->gpu_error.first_error = NULL;
1939 spin_unlock_irq(&i915->gpu_error.lock);
1941 if (!IS_ERR_OR_NULL(error))
1942 i915_gpu_coredump_put(error);
1945 void i915_disable_error_state(struct drm_i915_private *i915, int err)
1947 spin_lock_irq(&i915->gpu_error.lock);
1948 if (!i915->gpu_error.first_error)
1949 i915->gpu_error.first_error = ERR_PTR(err);
1950 spin_unlock_irq(&i915->gpu_error.lock);