/drivers/gpu/drm/i915/i915_gpu_error.c
C | 1938 lines | 1489 code | 367 blank | 82 comment | 234 complexity | 9895ef423c13bb31a1a16a967235a76a MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0, GPL-2.0
- /*
- * Copyright (c) 2008 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.
- *
- * Authors:
- * Eric Anholt <eric@anholt.net>
- * Keith Packard <keithp@keithp.com>
- * Mika Kuoppala <mika.kuoppala@intel.com>
- *
- */
- #include <linux/ascii85.h>
- #include <linux/nmi.h>
- #include <linux/pagevec.h>
- #include <linux/scatterlist.h>
- #include <linux/utsname.h>
- #include <linux/zlib.h>
- #include <drm/drm_print.h>
- #include "display/intel_atomic.h"
- #include "display/intel_csr.h"
- #include "display/intel_overlay.h"
- #include "gem/i915_gem_context.h"
- #include "gem/i915_gem_lmem.h"
- #include "gt/intel_gt_pm.h"
- #include "i915_drv.h"
- #include "i915_gpu_error.h"
- #include "i915_memcpy.h"
- #include "i915_scatterlist.h"
- #define ALLOW_FAIL (GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_NOWARN)
- #define ATOMIC_MAYFAIL (GFP_ATOMIC | __GFP_NOWARN)
- static void __sg_set_buf(struct scatterlist *sg,
- void *addr, unsigned int len, loff_t it)
- {
- sg->page_link = (unsigned long)virt_to_page(addr);
- sg->offset = offset_in_page(addr);
- sg->length = len;
- sg->dma_address = it;
- }
- static bool __i915_error_grow(struct drm_i915_error_state_buf *e, size_t len)
- {
- if (!len)
- return false;
- if (e->bytes + len + 1 <= e->size)
- return true;
- if (e->bytes) {
- __sg_set_buf(e->cur++, e->buf, e->bytes, e->iter);
- e->iter += e->bytes;
- e->buf = NULL;
- e->bytes = 0;
- }
- if (e->cur == e->end) {
- struct scatterlist *sgl;
- sgl = (typeof(sgl))__get_free_page(ALLOW_FAIL);
- if (!sgl) {
- e->err = -ENOMEM;
- return false;
- }
- if (e->cur) {
- e->cur->offset = 0;
- e->cur->length = 0;
- e->cur->page_link =
- (unsigned long)sgl | SG_CHAIN;
- } else {
- e->sgl = sgl;
- }
- e->cur = sgl;
- e->end = sgl + SG_MAX_SINGLE_ALLOC - 1;
- }
- e->size = ALIGN(len + 1, SZ_64K);
- e->buf = kmalloc(e->size, ALLOW_FAIL);
- if (!e->buf) {
- e->size = PAGE_ALIGN(len + 1);
- e->buf = kmalloc(e->size, GFP_KERNEL);
- }
- if (!e->buf) {
- e->err = -ENOMEM;
- return false;
- }
- return true;
- }
- __printf(2, 0)
- static void i915_error_vprintf(struct drm_i915_error_state_buf *e,
- const char *fmt, va_list args)
- {
- va_list ap;
- int len;
- if (e->err)
- return;
- va_copy(ap, args);
- len = vsnprintf(NULL, 0, fmt, ap);
- va_end(ap);
- if (len <= 0) {
- e->err = len;
- return;
- }
- if (!__i915_error_grow(e, len))
- return;
- GEM_BUG_ON(e->bytes >= e->size);
- len = vscnprintf(e->buf + e->bytes, e->size - e->bytes, fmt, args);
- if (len < 0) {
- e->err = len;
- return;
- }
- e->bytes += len;
- }
- static void i915_error_puts(struct drm_i915_error_state_buf *e, const char *str)
- {
- unsigned len;
- if (e->err || !str)
- return;
- len = strlen(str);
- if (!__i915_error_grow(e, len))
- return;
- GEM_BUG_ON(e->bytes + len > e->size);
- memcpy(e->buf + e->bytes, str, len);
- e->bytes += len;
- }
- #define err_printf(e, ...) i915_error_printf(e, __VA_ARGS__)
- #define err_puts(e, s) i915_error_puts(e, s)
- static void __i915_printfn_error(struct drm_printer *p, struct va_format *vaf)
- {
- i915_error_vprintf(p->arg, vaf->fmt, *vaf->va);
- }
- static inline struct drm_printer
- i915_error_printer(struct drm_i915_error_state_buf *e)
- {
- struct drm_printer p = {
- .printfn = __i915_printfn_error,
- .arg = e,
- };
- return p;
- }
- /* single threaded page allocator with a reserved stash for emergencies */
- static void pool_fini(struct pagevec *pv)
- {
- pagevec_release(pv);
- }
- static int pool_refill(struct pagevec *pv, gfp_t gfp)
- {
- while (pagevec_space(pv)) {
- struct page *p;
- p = alloc_page(gfp);
- if (!p)
- return -ENOMEM;
- pagevec_add(pv, p);
- }
- return 0;
- }
- static int pool_init(struct pagevec *pv, gfp_t gfp)
- {
- int err;
- pagevec_init(pv);
- err = pool_refill(pv, gfp);
- if (err)
- pool_fini(pv);
- return err;
- }
- static void *pool_alloc(struct pagevec *pv, gfp_t gfp)
- {
- struct page *p;
- p = alloc_page(gfp);
- if (!p && pagevec_count(pv))
- p = pv->pages[--pv->nr];
- return p ? page_address(p) : NULL;
- }
- static void pool_free(struct pagevec *pv, void *addr)
- {
- struct page *p = virt_to_page(addr);
- if (pagevec_space(pv))
- pagevec_add(pv, p);
- else
- __free_page(p);
- }
- #ifdef CONFIG_DRM_I915_COMPRESS_ERROR
- struct i915_vma_compress {
- struct pagevec pool;
- struct z_stream_s zstream;
- void *tmp;
- };
- static bool compress_init(struct i915_vma_compress *c)
- {
- struct z_stream_s *zstream = &c->zstream;
- if (pool_init(&c->pool, ALLOW_FAIL))
- return false;
- zstream->workspace =
- kmalloc(zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL),
- ALLOW_FAIL);
- if (!zstream->workspace) {
- pool_fini(&c->pool);
- return false;
- }
- c->tmp = NULL;
- if (i915_has_memcpy_from_wc())
- c->tmp = pool_alloc(&c->pool, ALLOW_FAIL);
- return true;
- }
- static bool compress_start(struct i915_vma_compress *c)
- {
- struct z_stream_s *zstream = &c->zstream;
- void *workspace = zstream->workspace;
- memset(zstream, 0, sizeof(*zstream));
- zstream->workspace = workspace;
- return zlib_deflateInit(zstream, Z_DEFAULT_COMPRESSION) == Z_OK;
- }
- static void *compress_next_page(struct i915_vma_compress *c,
- struct i915_vma_coredump *dst)
- {
- void *page;
- if (dst->page_count >= dst->num_pages)
- return ERR_PTR(-ENOSPC);
- page = pool_alloc(&c->pool, ALLOW_FAIL);
- if (!page)
- return ERR_PTR(-ENOMEM);
- return dst->pages[dst->page_count++] = page;
- }
- static int compress_page(struct i915_vma_compress *c,
- void *src,
- struct i915_vma_coredump *dst,
- bool wc)
- {
- struct z_stream_s *zstream = &c->zstream;
- zstream->next_in = src;
- if (wc && c->tmp && i915_memcpy_from_wc(c->tmp, src, PAGE_SIZE))
- zstream->next_in = c->tmp;
- zstream->avail_in = PAGE_SIZE;
- do {
- if (zstream->avail_out == 0) {
- zstream->next_out = compress_next_page(c, dst);
- if (IS_ERR(zstream->next_out))
- return PTR_ERR(zstream->next_out);
- zstream->avail_out = PAGE_SIZE;
- }
- if (zlib_deflate(zstream, Z_NO_FLUSH) != Z_OK)
- return -EIO;
- } while (zstream->avail_in);
- /* Fallback to uncompressed if we increase size? */
- if (0 && zstream->total_out > zstream->total_in)
- return -E2BIG;
- return 0;
- }
- static int compress_flush(struct i915_vma_compress *c,
- struct i915_vma_coredump *dst)
- {
- struct z_stream_s *zstream = &c->zstream;
- do {
- switch (zlib_deflate(zstream, Z_FINISH)) {
- case Z_OK: /* more space requested */
- zstream->next_out = compress_next_page(c, dst);
- if (IS_ERR(zstream->next_out))
- return PTR_ERR(zstream->next_out);
- zstream->avail_out = PAGE_SIZE;
- break;
- case Z_STREAM_END:
- goto end;
- default: /* any error */
- return -EIO;
- }
- } while (1);
- end:
- memset(zstream->next_out, 0, zstream->avail_out);
- dst->unused = zstream->avail_out;
- return 0;
- }
- static void compress_finish(struct i915_vma_compress *c)
- {
- zlib_deflateEnd(&c->zstream);
- }
- static void compress_fini(struct i915_vma_compress *c)
- {
- kfree(c->zstream.workspace);
- if (c->tmp)
- pool_free(&c->pool, c->tmp);
- pool_fini(&c->pool);
- }
- static void err_compression_marker(struct drm_i915_error_state_buf *m)
- {
- err_puts(m, ":");
- }
- #else
- struct i915_vma_compress {
- struct pagevec pool;
- };
- static bool compress_init(struct i915_vma_compress *c)
- {
- return pool_init(&c->pool, ALLOW_FAIL) == 0;
- }
- static bool compress_start(struct i915_vma_compress *c)
- {
- return true;
- }
- static int compress_page(struct i915_vma_compress *c,
- void *src,
- struct i915_vma_coredump *dst,
- bool wc)
- {
- void *ptr;
- ptr = pool_alloc(&c->pool, ALLOW_FAIL);
- if (!ptr)
- return -ENOMEM;
- if (!(wc && i915_memcpy_from_wc(ptr, src, PAGE_SIZE)))
- memcpy(ptr, src, PAGE_SIZE);
- dst->pages[dst->page_count++] = ptr;
- return 0;
- }
- static int compress_flush(struct i915_vma_compress *c,
- struct i915_vma_coredump *dst)
- {
- return 0;
- }
- static void compress_finish(struct i915_vma_compress *c)
- {
- }
- static void compress_fini(struct i915_vma_compress *c)
- {
- pool_fini(&c->pool);
- }
- static void err_compression_marker(struct drm_i915_error_state_buf *m)
- {
- err_puts(m, "~");
- }
- #endif
- static void error_print_instdone(struct drm_i915_error_state_buf *m,
- const struct intel_engine_coredump *ee)
- {
- const struct sseu_dev_info *sseu = &RUNTIME_INFO(m->i915)->sseu;
- int slice;
- int subslice;
- err_printf(m, " INSTDONE: 0x%08x\n",
- ee->instdone.instdone);
- if (ee->engine->class != RENDER_CLASS || INTEL_GEN(m->i915) <= 3)
- return;
- err_printf(m, " SC_INSTDONE: 0x%08x\n",
- ee->instdone.slice_common);
- if (INTEL_GEN(m->i915) <= 6)
- return;
- for_each_instdone_slice_subslice(m->i915, sseu, slice, subslice)
- err_printf(m, " SAMPLER_INSTDONE[%d][%d]: 0x%08x\n",
- slice, subslice,
- ee->instdone.sampler[slice][subslice]);
- for_each_instdone_slice_subslice(m->i915, sseu, slice, subslice)
- err_printf(m, " ROW_INSTDONE[%d][%d]: 0x%08x\n",
- slice, subslice,
- ee->instdone.row[slice][subslice]);
- if (INTEL_GEN(m->i915) < 12)
- return;
- err_printf(m, " SC_INSTDONE_EXTRA: 0x%08x\n",
- ee->instdone.slice_common_extra[0]);
- err_printf(m, " SC_INSTDONE_EXTRA2: 0x%08x\n",
- ee->instdone.slice_common_extra[1]);
- }
- static void error_print_request(struct drm_i915_error_state_buf *m,
- const char *prefix,
- const struct i915_request_coredump *erq)
- {
- if (!erq->seqno)
- return;
- err_printf(m, "%s pid %d, seqno %8x:%08x%s%s, prio %d, start %08x, head %08x, tail %08x\n",
- prefix, erq->pid, erq->context, erq->seqno,
- test_bit(DMA_FENCE_FLAG_SIGNALED_BIT,
- &erq->flags) ? "!" : "",
- test_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT,
- &erq->flags) ? "+" : "",
- erq->sched_attr.priority,
- erq->start, erq->head, erq->tail);
- }
- static void error_print_context(struct drm_i915_error_state_buf *m,
- const char *header,
- const struct i915_gem_context_coredump *ctx)
- {
- const u32 period = RUNTIME_INFO(m->i915)->cs_timestamp_period_ns;
- err_printf(m, "%s%s[%d] prio %d, guilty %d active %d, runtime total %lluns, avg %lluns\n",
- header, ctx->comm, ctx->pid, ctx->sched_attr.priority,
- ctx->guilty, ctx->active,
- ctx->total_runtime * period,
- mul_u32_u32(ctx->avg_runtime, period));
- }
- static struct i915_vma_coredump *
- __find_vma(struct i915_vma_coredump *vma, const char *name)
- {
- while (vma) {
- if (strcmp(vma->name, name) == 0)
- return vma;
- vma = vma->next;
- }
- return NULL;
- }
- static struct i915_vma_coredump *
- find_batch(const struct intel_engine_coredump *ee)
- {
- return __find_vma(ee->vma, "batch");
- }
- static void error_print_engine(struct drm_i915_error_state_buf *m,
- const struct intel_engine_coredump *ee)
- {
- struct i915_vma_coredump *batch;
- int n;
- err_printf(m, "%s command stream:\n", ee->engine->name);
- err_printf(m, " CCID: 0x%08x\n", ee->ccid);
- err_printf(m, " START: 0x%08x\n", ee->start);
- err_printf(m, " HEAD: 0x%08x [0x%08x]\n", ee->head, ee->rq_head);
- err_printf(m, " TAIL: 0x%08x [0x%08x, 0x%08x]\n",
- ee->tail, ee->rq_post, ee->rq_tail);
- err_printf(m, " CTL: 0x%08x\n", ee->ctl);
- err_printf(m, " MODE: 0x%08x\n", ee->mode);
- err_printf(m, " HWS: 0x%08x\n", ee->hws);
- err_printf(m, " ACTHD: 0x%08x %08x\n",
- (u32)(ee->acthd>>32), (u32)ee->acthd);
- err_printf(m, " IPEIR: 0x%08x\n", ee->ipeir);
- err_printf(m, " IPEHR: 0x%08x\n", ee->ipehr);
- err_printf(m, " ESR: 0x%08x\n", ee->esr);
- error_print_instdone(m, ee);
- batch = find_batch(ee);
- if (batch) {
- u64 start = batch->gtt_offset;
- u64 end = start + batch->gtt_size;
- err_printf(m, " batch: [0x%08x_%08x, 0x%08x_%08x]\n",
- upper_32_bits(start), lower_32_bits(start),
- upper_32_bits(end), lower_32_bits(end));
- }
- if (INTEL_GEN(m->i915) >= 4) {
- err_printf(m, " BBADDR: 0x%08x_%08x\n",
- (u32)(ee->bbaddr>>32), (u32)ee->bbaddr);
- err_printf(m, " BB_STATE: 0x%08x\n", ee->bbstate);
- err_printf(m, " INSTPS: 0x%08x\n", ee->instps);
- }
- err_printf(m, " INSTPM: 0x%08x\n", ee->instpm);
- err_printf(m, " FADDR: 0x%08x %08x\n", upper_32_bits(ee->faddr),
- lower_32_bits(ee->faddr));
- if (INTEL_GEN(m->i915) >= 6) {
- err_printf(m, " RC PSMI: 0x%08x\n", ee->rc_psmi);
- err_printf(m, " FAULT_REG: 0x%08x\n", ee->fault_reg);
- }
- if (HAS_PPGTT(m->i915)) {
- err_printf(m, " GFX_MODE: 0x%08x\n", ee->vm_info.gfx_mode);
- if (INTEL_GEN(m->i915) >= 8) {
- int i;
- for (i = 0; i < 4; i++)
- err_printf(m, " PDP%d: 0x%016llx\n",
- i, ee->vm_info.pdp[i]);
- } else {
- err_printf(m, " PP_DIR_BASE: 0x%08x\n",
- ee->vm_info.pp_dir_base);
- }
- }
- err_printf(m, " engine reset count: %u\n", ee->reset_count);
- for (n = 0; n < ee->num_ports; n++) {
- err_printf(m, " ELSP[%d]:", n);
- error_print_request(m, " ", &ee->execlist[n]);
- }
- error_print_context(m, " Active context: ", &ee->context);
- }
- void i915_error_printf(struct drm_i915_error_state_buf *e, const char *f, ...)
- {
- va_list args;
- va_start(args, f);
- i915_error_vprintf(e, f, args);
- va_end(args);
- }
- static void print_error_vma(struct drm_i915_error_state_buf *m,
- const struct intel_engine_cs *engine,
- const struct i915_vma_coredump *vma)
- {
- char out[ASCII85_BUFSZ];
- int page;
- if (!vma)
- return;
- err_printf(m, "%s --- %s = 0x%08x %08x\n",
- engine ? engine->name : "global", vma->name,
- upper_32_bits(vma->gtt_offset),
- lower_32_bits(vma->gtt_offset));
- if (vma->gtt_page_sizes > I915_GTT_PAGE_SIZE_4K)
- err_printf(m, "gtt_page_sizes = 0x%08x\n", vma->gtt_page_sizes);
- err_compression_marker(m);
- for (page = 0; page < vma->page_count; page++) {
- int i, len;
- len = PAGE_SIZE;
- if (page == vma->page_count - 1)
- len -= vma->unused;
- len = ascii85_encode_len(len);
- for (i = 0; i < len; i++)
- err_puts(m, ascii85_encode(vma->pages[page][i], out));
- }
- err_puts(m, "\n");
- }
- static void err_print_capabilities(struct drm_i915_error_state_buf *m,
- const struct intel_device_info *info,
- const struct intel_runtime_info *runtime,
- const struct intel_driver_caps *caps)
- {
- struct drm_printer p = i915_error_printer(m);
- intel_device_info_print_static(info, &p);
- intel_device_info_print_runtime(runtime, &p);
- intel_device_info_print_topology(&runtime->sseu, &p);
- intel_driver_caps_print(caps, &p);
- }
- static void err_print_params(struct drm_i915_error_state_buf *m,
- const struct i915_params *params)
- {
- struct drm_printer p = i915_error_printer(m);
- i915_params_dump(params, &p);
- }
- static void err_print_pciid(struct drm_i915_error_state_buf *m,
- struct drm_i915_private *i915)
- {
- struct pci_dev *pdev = i915->drm.pdev;
- err_printf(m, "PCI ID: 0x%04x\n", pdev->device);
- err_printf(m, "PCI Revision: 0x%02x\n", pdev->revision);
- err_printf(m, "PCI Subsystem: %04x:%04x\n",
- pdev->subsystem_vendor,
- pdev->subsystem_device);
- }
- static void err_print_uc(struct drm_i915_error_state_buf *m,
- const struct intel_uc_coredump *error_uc)
- {
- struct drm_printer p = i915_error_printer(m);
- intel_uc_fw_dump(&error_uc->guc_fw, &p);
- intel_uc_fw_dump(&error_uc->huc_fw, &p);
- print_error_vma(m, NULL, error_uc->guc_log);
- }
- static void err_free_sgl(struct scatterlist *sgl)
- {
- while (sgl) {
- struct scatterlist *sg;
- for (sg = sgl; !sg_is_chain(sg); sg++) {
- kfree(sg_virt(sg));
- if (sg_is_last(sg))
- break;
- }
- sg = sg_is_last(sg) ? NULL : sg_chain_ptr(sg);
- free_page((unsigned long)sgl);
- sgl = sg;
- }
- }
- static void err_print_gt(struct drm_i915_error_state_buf *m,
- struct intel_gt_coredump *gt)
- {
- const struct intel_engine_coredump *ee;
- int i;
- err_printf(m, "GT awake: %s\n", yesno(gt->awake));
- err_printf(m, "EIR: 0x%08x\n", gt->eir);
- err_printf(m, "IER: 0x%08x\n", gt->ier);
- for (i = 0; i < gt->ngtier; i++)
- err_printf(m, "GTIER[%d]: 0x%08x\n", i, gt->gtier[i]);
- err_printf(m, "PGTBL_ER: 0x%08x\n", gt->pgtbl_er);
- err_printf(m, "FORCEWAKE: 0x%08x\n", gt->forcewake);
- err_printf(m, "DERRMR: 0x%08x\n", gt->derrmr);
- for (i = 0; i < gt->nfence; i++)
- err_printf(m, " fence[%d] = %08llx\n", i, gt->fence[i]);
- if (IS_GEN_RANGE(m->i915, 6, 11)) {
- err_printf(m, "ERROR: 0x%08x\n", gt->error);
- err_printf(m, "DONE_REG: 0x%08x\n", gt->done_reg);
- }
- if (INTEL_GEN(m->i915) >= 8)
- err_printf(m, "FAULT_TLB_DATA: 0x%08x 0x%08x\n",
- gt->fault_data1, gt->fault_data0);
- if (IS_GEN(m->i915, 7))
- err_printf(m, "ERR_INT: 0x%08x\n", gt->err_int);
- if (IS_GEN_RANGE(m->i915, 8, 11))
- err_printf(m, "GTT_CACHE_EN: 0x%08x\n", gt->gtt_cache);
- if (IS_GEN(m->i915, 12))
- err_printf(m, "AUX_ERR_DBG: 0x%08x\n", gt->aux_err);
- if (INTEL_GEN(m->i915) >= 12) {
- int i;
- for (i = 0; i < GEN12_SFC_DONE_MAX; i++)
- err_printf(m, " SFC_DONE[%d]: 0x%08x\n", i,
- gt->sfc_done[i]);
- err_printf(m, " GAM_DONE: 0x%08x\n", gt->gam_done);
- }
- for (ee = gt->engine; ee; ee = ee->next) {
- const struct i915_vma_coredump *vma;
- error_print_engine(m, ee);
- for (vma = ee->vma; vma; vma = vma->next)
- print_error_vma(m, ee->engine, vma);
- }
- if (gt->uc)
- err_print_uc(m, gt->uc);
- }
- static void __err_print_to_sgl(struct drm_i915_error_state_buf *m,
- struct i915_gpu_coredump *error)
- {
- const struct intel_engine_coredump *ee;
- struct timespec64 ts;
- if (*error->error_msg)
- err_printf(m, "%s\n", error->error_msg);
- err_printf(m, "Kernel: %s %s\n",
- init_utsname()->release,
- init_utsname()->machine);
- err_printf(m, "Driver: %s\n", DRIVER_DATE);
- ts = ktime_to_timespec64(error->time);
- err_printf(m, "Time: %lld s %ld us\n",
- (s64)ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC);
- ts = ktime_to_timespec64(error->boottime);
- err_printf(m, "Boottime: %lld s %ld us\n",
- (s64)ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC);
- ts = ktime_to_timespec64(error->uptime);
- err_printf(m, "Uptime: %lld s %ld us\n",
- (s64)ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC);
- err_printf(m, "Capture: %lu jiffies; %d ms ago\n",
- error->capture, jiffies_to_msecs(jiffies - error->capture));
- for (ee = error->gt ? error->gt->engine : NULL; ee; ee = ee->next)
- err_printf(m, "Active process (on ring %s): %s [%d]\n",
- ee->engine->name,
- ee->context.comm,
- ee->context.pid);
- err_printf(m, "Reset count: %u\n", error->reset_count);
- err_printf(m, "Suspend count: %u\n", error->suspend_count);
- err_printf(m, "Platform: %s\n", intel_platform_name(error->device_info.platform));
- err_printf(m, "Subplatform: 0x%x\n",
- intel_subplatform(&error->runtime_info,
- error->device_info.platform));
- err_print_pciid(m, m->i915);
- err_printf(m, "IOMMU enabled?: %d\n", error->iommu);
- if (HAS_CSR(m->i915)) {
- struct intel_csr *csr = &m->i915->csr;
- err_printf(m, "DMC loaded: %s\n",
- yesno(csr->dmc_payload != NULL));
- err_printf(m, "DMC fw version: %d.%d\n",
- CSR_VERSION_MAJOR(csr->version),
- CSR_VERSION_MINOR(csr->version));
- }
- err_printf(m, "RPM wakelock: %s\n", yesno(error->wakelock));
- err_printf(m, "PM suspended: %s\n", yesno(error->suspended));
- if (error->gt)
- err_print_gt(m, error->gt);
- if (error->overlay)
- intel_overlay_print_error_state(m, error->overlay);
- if (error->display)
- intel_display_print_error_state(m, error->display);
- err_print_capabilities(m, &error->device_info, &error->runtime_info,
- &error->driver_caps);
- err_print_params(m, &error->params);
- }
- static int err_print_to_sgl(struct i915_gpu_coredump *error)
- {
- struct drm_i915_error_state_buf m;
- if (IS_ERR(error))
- return PTR_ERR(error);
- if (READ_ONCE(error->sgl))
- return 0;
- memset(&m, 0, sizeof(m));
- m.i915 = error->i915;
- __err_print_to_sgl(&m, error);
- if (m.buf) {
- __sg_set_buf(m.cur++, m.buf, m.bytes, m.iter);
- m.bytes = 0;
- m.buf = NULL;
- }
- if (m.cur) {
- GEM_BUG_ON(m.end < m.cur);
- sg_mark_end(m.cur - 1);
- }
- GEM_BUG_ON(m.sgl && !m.cur);
- if (m.err) {
- err_free_sgl(m.sgl);
- return m.err;
- }
- if (cmpxchg(&error->sgl, NULL, m.sgl))
- err_free_sgl(m.sgl);
- return 0;
- }
- ssize_t i915_gpu_coredump_copy_to_buffer(struct i915_gpu_coredump *error,
- char *buf, loff_t off, size_t rem)
- {
- struct scatterlist *sg;
- size_t count;
- loff_t pos;
- int err;
- if (!error || !rem)
- return 0;
- err = err_print_to_sgl(error);
- if (err)
- return err;
- sg = READ_ONCE(error->fit);
- if (!sg || off < sg->dma_address)
- sg = error->sgl;
- if (!sg)
- return 0;
- pos = sg->dma_address;
- count = 0;
- do {
- size_t len, start;
- if (sg_is_chain(sg)) {
- sg = sg_chain_ptr(sg);
- GEM_BUG_ON(sg_is_chain(sg));
- }
- len = sg->length;
- if (pos + len <= off) {
- pos += len;
- continue;
- }
- start = sg->offset;
- if (pos < off) {
- GEM_BUG_ON(off - pos > len);
- len -= off - pos;
- start += off - pos;
- pos = off;
- }
- len = min(len, rem);
- GEM_BUG_ON(!len || len > sg->length);
- memcpy(buf, page_address(sg_page(sg)) + start, len);
- count += len;
- pos += len;
- buf += len;
- rem -= len;
- if (!rem) {
- WRITE_ONCE(error->fit, sg);
- break;
- }
- } while (!sg_is_last(sg++));
- return count;
- }
- static void i915_vma_coredump_free(struct i915_vma_coredump *vma)
- {
- while (vma) {
- struct i915_vma_coredump *next = vma->next;
- int page;
- for (page = 0; page < vma->page_count; page++)
- free_page((unsigned long)vma->pages[page]);
- kfree(vma);
- vma = next;
- }
- }
- static void cleanup_params(struct i915_gpu_coredump *error)
- {
- i915_params_free(&error->params);
- }
- static void cleanup_uc(struct intel_uc_coredump *uc)
- {
- kfree(uc->guc_fw.path);
- kfree(uc->huc_fw.path);
- i915_vma_coredump_free(uc->guc_log);
- kfree(uc);
- }
- static void cleanup_gt(struct intel_gt_coredump *gt)
- {
- while (gt->engine) {
- struct intel_engine_coredump *ee = gt->engine;
- gt->engine = ee->next;
- i915_vma_coredump_free(ee->vma);
- kfree(ee);
- }
- if (gt->uc)
- cleanup_uc(gt->uc);
- kfree(gt);
- }
- void __i915_gpu_coredump_free(struct kref *error_ref)
- {
- struct i915_gpu_coredump *error =
- container_of(error_ref, typeof(*error), ref);
- while (error->gt) {
- struct intel_gt_coredump *gt = error->gt;
- error->gt = gt->next;
- cleanup_gt(gt);
- }
- kfree(error->overlay);
- kfree(error->display);
- cleanup_params(error);
- err_free_sgl(error->sgl);
- kfree(error);
- }
- static struct i915_vma_coredump *
- i915_vma_coredump_create(const struct intel_gt *gt,
- const struct i915_vma *vma,
- const char *name,
- struct i915_vma_compress *compress)
- {
- struct i915_ggtt *ggtt = gt->ggtt;
- const u64 slot = ggtt->error_capture.start;
- struct i915_vma_coredump *dst;
- unsigned long num_pages;
- struct sgt_iter iter;
- int ret;
- might_sleep();
- if (!vma || !vma->pages || !compress)
- return NULL;
- num_pages = min_t(u64, vma->size, vma->obj->base.size) >> PAGE_SHIFT;
- num_pages = DIV_ROUND_UP(10 * num_pages, 8); /* worstcase zlib growth */
- dst = kmalloc(sizeof(*dst) + num_pages * sizeof(u32 *), ALLOW_FAIL);
- if (!dst)
- return NULL;
- if (!compress_start(compress)) {
- kfree(dst);
- return NULL;
- }
- strcpy(dst->name, name);
- dst->next = NULL;
- dst->gtt_offset = vma->node.start;
- dst->gtt_size = vma->node.size;
- dst->gtt_page_sizes = vma->page_sizes.gtt;
- dst->num_pages = num_pages;
- dst->page_count = 0;
- dst->unused = 0;
- ret = -EINVAL;
- if (drm_mm_node_allocated(&ggtt->error_capture)) {
- void __iomem *s;
- dma_addr_t dma;
- for_each_sgt_daddr(dma, iter, vma->pages) {
- ggtt->vm.insert_page(&ggtt->vm, dma, slot,
- I915_CACHE_NONE, 0);
- mb();
- s = io_mapping_map_wc(&ggtt->iomap, slot, PAGE_SIZE);
- ret = compress_page(compress,
- (void __force *)s, dst,
- true);
- io_mapping_unmap(s);
- if (ret)
- break;
- }
- } else if (i915_gem_object_is_lmem(vma->obj)) {
- struct intel_memory_region *mem = vma->obj->mm.region;
- dma_addr_t dma;
- for_each_sgt_daddr(dma, iter, vma->pages) {
- void __iomem *s;
- s = io_mapping_map_wc(&mem->iomap, dma, PAGE_SIZE);
- ret = compress_page(compress,
- (void __force *)s, dst,
- true);
- io_mapping_unmap(s);
- if (ret)
- break;
- }
- } else {
- struct page *page;
- for_each_sgt_page(page, iter, vma->pages) {
- void *s;
- drm_clflush_pages(&page, 1);
- s = kmap(page);
- ret = compress_page(compress, s, dst, false);
- kunmap(page);
- drm_clflush_pages(&page, 1);
- if (ret)
- break;
- }
- }
- if (ret || compress_flush(compress, dst)) {
- while (dst->page_count--)
- pool_free(&compress->pool, dst->pages[dst->page_count]);
- kfree(dst);
- dst = NULL;
- }
- compress_finish(compress);
- return dst;
- }
- static void gt_record_fences(struct intel_gt_coredump *gt)
- {
- struct i915_ggtt *ggtt = gt->_gt->ggtt;
- struct intel_uncore *uncore = gt->_gt->uncore;
- int i;
- if (INTEL_GEN(uncore->i915) >= 6) {
- for (i = 0; i < ggtt->num_fences; i++)
- gt->fence[i] =
- intel_uncore_read64(uncore,
- FENCE_REG_GEN6_LO(i));
- } else if (INTEL_GEN(uncore->i915) >= 4) {
- for (i = 0; i < ggtt->num_fences; i++)
- gt->fence[i] =
- intel_uncore_read64(uncore,
- FENCE_REG_965_LO(i));
- } else {
- for (i = 0; i < ggtt->num_fences; i++)
- gt->fence[i] =
- intel_uncore_read(uncore, FENCE_REG(i));
- }
- gt->nfence = i;
- }
- static void engine_record_registers(struct intel_engine_coredump *ee)
- {
- const struct intel_engine_cs *engine = ee->engine;
- struct drm_i915_private *i915 = engine->i915;
- if (INTEL_GEN(i915) >= 6) {
- ee->rc_psmi = ENGINE_READ(engine, RING_PSMI_CTL);
- if (INTEL_GEN(i915) >= 12)
- ee->fault_reg = intel_uncore_read(engine->uncore,
- GEN12_RING_FAULT_REG);
- else if (INTEL_GEN(i915) >= 8)
- ee->fault_reg = intel_uncore_read(engine->uncore,
- GEN8_RING_FAULT_REG);
- else
- ee->fault_reg = GEN6_RING_FAULT_REG_READ(engine);
- }
- if (INTEL_GEN(i915) >= 4) {
- ee->esr = ENGINE_READ(engine, RING_ESR);
- ee->faddr = ENGINE_READ(engine, RING_DMA_FADD);
- ee->ipeir = ENGINE_READ(engine, RING_IPEIR);
- ee->ipehr = ENGINE_READ(engine, RING_IPEHR);
- ee->instps = ENGINE_READ(engine, RING_INSTPS);
- ee->bbaddr = ENGINE_READ(engine, RING_BBADDR);
- ee->ccid = ENGINE_READ(engine, CCID);
- if (INTEL_GEN(i915) >= 8) {
- ee->faddr |= (u64)ENGINE_READ(engine, RING_DMA_FADD_UDW) << 32;
- ee->bbaddr |= (u64)ENGINE_READ(engine, RING_BBADDR_UDW) << 32;
- }
- ee->bbstate = ENGINE_READ(engine, RING_BBSTATE);
- } else {
- ee->faddr = ENGINE_READ(engine, DMA_FADD_I8XX);
- ee->ipeir = ENGINE_READ(engine, IPEIR);
- ee->ipehr = ENGINE_READ(engine, IPEHR);
- }
- intel_engine_get_instdone(engine, &ee->instdone);
- ee->instpm = ENGINE_READ(engine, RING_INSTPM);
- ee->acthd = intel_engine_get_active_head(engine);
- ee->start = ENGINE_READ(engine, RING_START);
- ee->head = ENGINE_READ(engine, RING_HEAD);
- ee->tail = ENGINE_READ(engine, RING_TAIL);
- ee->ctl = ENGINE_READ(engine, RING_CTL);
- if (INTEL_GEN(i915) > 2)
- ee->mode = ENGINE_READ(engine, RING_MI_MODE);
- if (!HWS_NEEDS_PHYSICAL(i915)) {
- i915_reg_t mmio;
- if (IS_GEN(i915, 7)) {
- switch (engine->id) {
- default:
- MISSING_CASE(engine->id);
- /* fall through */
- case RCS0:
- mmio = RENDER_HWS_PGA_GEN7;
- break;
- case BCS0:
- mmio = BLT_HWS_PGA_GEN7;
- break;
- case VCS0:
- mmio = BSD_HWS_PGA_GEN7;
- break;
- case VECS0:
- mmio = VEBOX_HWS_PGA_GEN7;
- break;
- }
- } else if (IS_GEN(engine->i915, 6)) {
- mmio = RING_HWS_PGA_GEN6(engine->mmio_base);
- } else {
- /* XXX: gen8 returns to sanity */
- mmio = RING_HWS_PGA(engine->mmio_base);
- }
- ee->hws = intel_uncore_read(engine->uncore, mmio);
- }
- ee->reset_count = i915_reset_engine_count(&i915->gpu_error, engine);
- if (HAS_PPGTT(i915)) {
- int i;
- ee->vm_info.gfx_mode = ENGINE_READ(engine, RING_MODE_GEN7);
- if (IS_GEN(i915, 6)) {
- ee->vm_info.pp_dir_base =
- ENGINE_READ(engine, RING_PP_DIR_BASE_READ);
- } else if (IS_GEN(i915, 7)) {
- ee->vm_info.pp_dir_base =
- ENGINE_READ(engine, RING_PP_DIR_BASE);
- } else if (INTEL_GEN(i915) >= 8) {
- u32 base = engine->mmio_base;
- for (i = 0; i < 4; i++) {
- ee->vm_info.pdp[i] =
- intel_uncore_read(engine->uncore,
- GEN8_RING_PDP_UDW(base, i));
- ee->vm_info.pdp[i] <<= 32;
- ee->vm_info.pdp[i] |=
- intel_uncore_read(engine->uncore,
- GEN8_RING_PDP_LDW(base, i));
- }
- }
- }
- }
- static void record_request(const struct i915_request *request,
- struct i915_request_coredump *erq)
- {
- const struct i915_gem_context *ctx;
- erq->flags = request->fence.flags;
- erq->context = request->fence.context;
- erq->seqno = request->fence.seqno;
- erq->sched_attr = request->sched.attr;
- erq->start = i915_ggtt_offset(request->ring->vma);
- erq->head = request->head;
- erq->tail = request->tail;
- erq->pid = 0;
- rcu_read_lock();
- ctx = rcu_dereference(request->context->gem_context);
- if (ctx)
- erq->pid = pid_nr(ctx->pid);
- rcu_read_unlock();
- }
- static void engine_record_execlists(struct intel_engine_coredump *ee)
- {
- const struct intel_engine_execlists * const el = &ee->engine->execlists;
- struct i915_request * const *port = el->active;
- unsigned int n = 0;
- while (*port)
- record_request(*port++, &ee->execlist[n++]);
- ee->num_ports = n;
- }
- static bool record_context(struct i915_gem_context_coredump *e,
- const struct i915_request *rq)
- {
- struct i915_gem_context *ctx;
- struct task_struct *task;
- bool simulated;
- rcu_read_lock();
- ctx = rcu_dereference(rq->context->gem_context);
- if (ctx && !kref_get_unless_zero(&ctx->ref))
- ctx = NULL;
- rcu_read_unlock();
- if (!ctx)
- return true;
- rcu_read_lock();
- task = pid_task(ctx->pid, PIDTYPE_PID);
- if (task) {
- strcpy(e->comm, task->comm);
- e->pid = task->pid;
- }
- rcu_read_unlock();
- e->sched_attr = ctx->sched;
- e->guilty = atomic_read(&ctx->guilty_count);
- e->active = atomic_read(&ctx->active_count);
- e->total_runtime = rq->context->runtime.total;
- e->avg_runtime = ewma_runtime_read(&rq->context->runtime.avg);
- simulated = i915_gem_context_no_error_capture(ctx);
- i915_gem_context_put(ctx);
- return simulated;
- }
- struct intel_engine_capture_vma {
- struct intel_engine_capture_vma *next;
- struct i915_vma *vma;
- char name[16];
- };
- static struct intel_engine_capture_vma *
- capture_vma(struct intel_engine_capture_vma *next,
- struct i915_vma *vma,
- const char *name,
- gfp_t gfp)
- {
- struct intel_engine_capture_vma *c;
- if (!vma)
- return next;
- c = kmalloc(sizeof(*c), gfp);
- if (!c)
- return next;
- if (!i915_active_acquire_if_busy(&vma->active)) {
- kfree(c);
- return next;
- }
- strcpy(c->name, name);
- c->vma = i915_vma_get(vma);
- c->next = next;
- return c;
- }
- static struct intel_engine_capture_vma *
- capture_user(struct intel_engine_capture_vma *capture,
- const struct i915_request *rq,
- gfp_t gfp)
- {
- struct i915_capture_list *c;
- for (c = rq->capture_list; c; c = c->next)
- capture = capture_vma(capture, c->vma, "user", gfp);
- return capture;
- }
- static struct i915_vma_coredump *
- capture_object(const struct intel_gt *gt,
- struct drm_i915_gem_object *obj,
- const char *name,
- struct i915_vma_compress *compress)
- {
- if (obj && i915_gem_object_has_pages(obj)) {
- struct i915_vma fake = {
- .node = { .start = U64_MAX, .size = obj->base.size },
- .size = obj->base.size,
- .pages = obj->mm.pages,
- .obj = obj,
- };
- return i915_vma_coredump_create(gt, &fake, name, compress);
- } else {
- return NULL;
- }
- }
- static void add_vma(struct intel_engine_coredump *ee,
- struct i915_vma_coredump *vma)
- {
- if (vma) {
- vma->next = ee->vma;
- ee->vma = vma;
- }
- }
- struct intel_engine_coredump *
- intel_engine_coredump_alloc(struct intel_engine_cs *engine, gfp_t gfp)
- {
- struct intel_engine_coredump *ee;
- ee = kzalloc(sizeof(*ee), gfp);
- if (!ee)
- return NULL;
- ee->engine = engine;
- engine_record_registers(ee);
- engine_record_execlists(ee);
- return ee;
- }
- struct intel_engine_capture_vma *
- intel_engine_coredump_add_request(struct intel_engine_coredump *ee,
- struct i915_request *rq,
- gfp_t gfp)
- {
- struct intel_engine_capture_vma *vma = NULL;
- ee->simulated |= record_context(&ee->context, rq);
- if (ee->simulated)
- return NULL;
- /*
- * We need to copy these to an anonymous buffer
- * as the simplest method to avoid being overwritten
- * by userspace.
- */
- vma = capture_vma(vma, rq->batch, "batch", gfp);
- vma = capture_user(vma, rq, gfp);
- vma = capture_vma(vma, rq->ring->vma, "ring", gfp);
- vma = capture_vma(vma, rq->context->state, "HW context", gfp);
- ee->rq_head = rq->head;
- ee->rq_post = rq->postfix;
- ee->rq_tail = rq->tail;
- return vma;
- }
- void
- intel_engine_coredump_add_vma(struct intel_engine_coredump *ee,
- struct intel_engine_capture_vma *capture,
- struct i915_vma_compress *compress)
- {
- const struct intel_engine_cs *engine = ee->engine;
- while (capture) {
- struct intel_engine_capture_vma *this = capture;
- struct i915_vma *vma = this->vma;
- add_vma(ee,
- i915_vma_coredump_create(engine->gt,
- vma, this->name,
- compress));
- i915_active_release(&vma->active);
- i915_vma_put(vma);
- capture = this->next;
- kfree(this);
- }
- add_vma(ee,
- i915_vma_coredump_create(engine->gt,
- engine->status_page.vma,
- "HW Status",
- compress));
- add_vma(ee,
- i915_vma_coredump_create(engine->gt,
- engine->wa_ctx.vma,
- "WA context",
- compress));
- add_vma(ee,
- capture_object(engine->gt,
- engine->default_state,
- "NULL context",
- compress));
- }
- static struct intel_engine_coredump *
- capture_engine(struct intel_engine_cs *engine,
- struct i915_vma_compress *compress)
- {
- struct intel_engine_capture_vma *capture = NULL;
- struct intel_engine_coredump *ee;
- struct i915_request *rq;
- unsigned long flags;
- ee = intel_engine_coredump_alloc(engine, GFP_KERNEL);
- if (!ee)
- return NULL;
- spin_lock_irqsave(&engine->active.lock, flags);
- rq = intel_engine_find_active_request(engine);
- if (rq)
- capture = intel_engine_coredump_add_request(ee, rq,
- ATOMIC_MAYFAIL);
- spin_unlock_irqrestore(&engine->active.lock, flags);
- if (!capture) {
- kfree(ee);
- return NULL;
- }
- intel_engine_coredump_add_vma(ee, capture, compress);
- return ee;
- }
- static void
- gt_record_engines(struct intel_gt_coredump *gt,
- struct i915_vma_compress *compress)
- {
- struct intel_engine_cs *engine;
- enum intel_engine_id id;
- for_each_engine(engine, gt->_gt, id) {
- struct intel_engine_coredump *ee;
- /* Refill our page pool before entering atomic section */
- pool_refill(&compress->pool, ALLOW_FAIL);
- ee = capture_engine(engine, compress);
- if (!ee)
- continue;
- gt->simulated |= ee->simulated;
- if (ee->simulated) {
- kfree(ee);
- continue;
- }
- ee->next = gt->engine;
- gt->engine = ee;
- }
- }
- static struct intel_uc_coredump *
- gt_record_uc(struct intel_gt_coredump *gt,
- struct i915_vma_compress *compress)
- {
- const struct intel_uc *uc = >->_gt->uc;
- struct intel_uc_coredump *error_uc;
- error_uc = kzalloc(sizeof(*error_uc), ALLOW_FAIL);
- if (!error_uc)
- return NULL;
- memcpy(&error_uc->guc_fw, &uc->guc.fw, sizeof(uc->guc.fw));
- memcpy(&error_uc->huc_fw, &uc->huc.fw, sizeof(uc->huc.fw));
- /* Non-default firmware paths will be specified by the modparam.
- * As modparams are generally accesible from the userspace make
- * explicit copies of the firmware paths.
- */
- error_uc->guc_fw.path = kstrdup(uc->guc.fw.path, ALLOW_FAIL);
- error_uc->huc_fw.path = kstrdup(uc->huc.fw.path, ALLOW_FAIL);
- error_uc->guc_log =
- i915_vma_coredump_create(gt->_gt,
- uc->guc.log.vma, "GuC log buffer",
- compress);
- return error_uc;
- }
- static void gt_capture_prepare(struct intel_gt_coredump *gt)
- {
- struct i915_ggtt *ggtt = gt->_gt->ggtt;
- mutex_lock(&ggtt->error_mutex);
- }
- static void gt_capture_finish(struct intel_gt_coredump *gt)
- {
- struct i915_ggtt *ggtt = gt->_gt->ggtt;
- if (drm_mm_node_allocated(&ggtt->error_capture))
- ggtt->vm.clear_range(&ggtt->vm,
- ggtt->error_capture.start,
- PAGE_SIZE);
- mutex_unlock(&ggtt->error_mutex);
- }
- /* Capture all registers which don't fit into another category. */
- static void gt_record_regs(struct intel_gt_coredump *gt)
- {
- struct intel_uncore *uncore = gt->_gt->uncore;
- struct drm_i915_private *i915 = uncore->i915;
- int i;
- /*
- * General organization
- * 1. Registers specific to a single generation
- * 2. Registers which belong to multiple generations
- * 3. Feature specific registers.
- * 4. Everything else
- * Please try to follow the order.
- */
- /* 1: Registers specific to a single generation */
- if (IS_VALLEYVIEW(i915)) {
- gt->gtier[0] = intel_uncore_read(uncore, GTIER);
- gt->ier = intel_uncore_read(uncore, VLV_IER);
- gt->forcewake = intel_uncore_read_fw(uncore, FORCEWAKE_VLV);
- }
- if (IS_GEN(i915, 7))
- gt->err_int = intel_uncore_read(uncore, GEN7_ERR_INT);
- if (INTEL_GEN(i915) >= 12) {
- gt->fault_data0 = intel_uncore_read(uncore,
- GEN12_FAULT_TLB_DATA0);
- gt->fault_data1 = intel_uncore_read(uncore,
- GEN12_FAULT_TLB_DATA1);
- } else if (INTEL_GEN(i915) >= 8) {
- gt->fault_data0 = intel_uncore_read(uncore,
- GEN8_FAULT_TLB_DATA0);
- gt->fault_data1 = intel_uncore_read(uncore,
- GEN8_FAULT_TLB_DATA1);
- }
- if (IS_GEN(i915, 6)) {
- gt->forcewake = intel_uncore_read_fw(uncore, FORCEWAKE);
- gt->gab_ctl = intel_uncore_read(uncore, GAB_CTL);
- gt->gfx_mode = intel_uncore_read(uncore, GFX_MODE);
- }
- /* 2: Registers which belong to multiple generations */
- if (INTEL_GEN(i915) >= 7)
- gt->forcewake = intel_uncore_read_fw(uncore, FORCEWAKE_MT);
- if (INTEL_GEN(i915) >= 6) {
- gt->derrmr = intel_uncore_read(uncore, DERRMR);
- if (INTEL_GEN(i915) < 12) {
- gt->error = intel_uncore_read(uncore, ERROR_GEN6);
- gt->done_reg = intel_uncore_read(uncore, DONE_REG);
- }
- }
- /* 3: Feature specific registers */
- if (IS_GEN_RANGE(i915, 6, 7)) {
- gt->gam_ecochk = intel_uncore_read(uncore, GAM_ECOCHK);
- gt->gac_eco = intel_uncore_read(uncore, GAC_ECO_BITS);
- }
- if (IS_GEN_RANGE(i915, 8, 11))
- gt->gtt_cache = intel_uncore_read(uncore, HSW_GTT_CACHE_EN);
- if (IS_GEN(i915, 12))
- gt->aux_err = intel_uncore_read(uncore, GEN12_AUX_ERR_DBG);
- if (INTEL_GEN(i915) >= 12) {
- for (i = 0; i < GEN12_SFC_DONE_MAX; i++) {
- gt->sfc_done[i] =
- intel_uncore_read(uncore, GEN12_SFC_DONE(i));
- }
- gt->gam_done = intel_uncore_read(uncore, GEN12_GAM_DONE);
- }
- /* 4: Everything else */
- if (INTEL_GEN(i915) >= 11) {
- gt->ier = intel_uncore_read(uncore, GEN8_DE_MISC_IER);
- gt->gtier[0] =
- intel_uncore_read(uncore,
- GEN11_RENDER_COPY_INTR_ENABLE);
- gt->gtier[1] =
- intel_uncore_read(uncore, GEN11_VCS_VECS_INTR_ENABLE);
- gt->gtier[2] =
- intel_uncore_read(uncore, GEN11_GUC_SG_INTR_ENABLE);
- gt->gtier[3] =
- intel_uncore_read(uncore,
- GEN11_GPM_WGBOXPERF_INTR_ENABLE);
- gt->gtier[4] =
- intel_uncore_read(uncore,
- GEN11_CRYPTO_RSVD_INTR_ENABLE);
- gt->gtier[5] =
- intel_uncore_read(uncore,
- GEN11_GUNIT_CSME_INTR_ENABLE);
- gt->ngtier = 6;
- } else if (INTEL_GEN(i915) >= 8) {
- gt->ier = intel_uncore_read(uncore, GEN8_DE_MISC_IER);
- for (i = 0; i < 4; i++)
- gt->gtier[i] =
- intel_uncore_read(uncore, GEN8_GT_IER(i));
- gt->ngtier = 4;
- } else if (HAS_PCH_SPLIT(i915)) {
- gt->ier = intel_uncore_read(uncore, DEIER);
- gt->gtier[0] = intel_uncore_read(uncore, GTIER);
- gt->ngtier = 1;
- } else if (IS_GEN(i915, 2)) {
- gt->ier = intel_uncore_read16(uncore, GEN2_IER);
- } else if (!IS_VALLEYVIEW(i915)) {
- gt->ier = intel_uncore_read(uncore, GEN2_IER);
- }
- gt->eir = intel_uncore_read(uncore, EIR);
- gt->pgtbl_er = intel_uncore_read(uncore, PGTBL_ER);
- }
- /*
- * Generate a semi-unique error code. The code is not meant to have meaning, The
- * code's only purpose is to try to prevent false duplicated bug reports by
- * grossly estimating a GPU error state.
- *
- * TODO Ideally, hashing the batchbuffer would be a very nice way to determine
- * the hang if we could strip the GTT offset information from it.
- *
- * It's only a small step better than a random number in its current form.
- */
- static u32 generate_ecode(const struct intel_engine_coredump *ee)
- {
- /*
- * IPEHR would be an ideal way to detect errors, as it's the gross
- * measure of "the command that hung." However, has some very common
- * synchronization commands which almost always appear in the case
- * strictly a client bug. Use instdone to differentiate those some.
- */
- return ee ? ee->ipehr ^ ee->instdone.instdone : 0;
- }
- static const char *error_msg(struct i915_gpu_coredump *error)
- {
- struct intel_engine_coredump *first = NULL;
- struct intel_gt_coredump *gt;
- intel_engine_mask_t engines;
- int len;
- engines = 0;
- for (gt = error->gt; gt; gt = gt->next) {
- struct intel_engine_coredump *cs;
- if (gt->engine && !first)
- first = gt->engine;
- for (cs = gt->engine; cs; cs = cs->next)
- engines |= cs->engine->mask;
- }
- len = scnprintf(error->error_msg, sizeof(error->error_msg),
- "GPU HANG: ecode %d:%x:%08x",
- INTEL_GEN(error->i915), engines,
- generate_ecode(first));
- if (first && first->context.pid) {
- /* Just show the first executing process, more is confusing */
- len += scnprintf(error->error_msg + len,
- sizeof(error->error_msg) - len,
- ", in %s [%d]",
- first->context.comm, first->context.pid);
- }
- return error->error_msg;
- }
- static void capture_gen(struct i915_gpu_coredump *error)
- {
- struct drm_i915_private *i915 = error->i915;
- error->wakelock = atomic_read(&i915->runtime_pm.wakeref_count);
- error->suspended = i915->runtime_pm.suspended;
- error->iommu = -1;
- #ifdef CONFIG_INTEL_IOMMU
- error->iommu = intel_iommu_gfx_mapped;
- #endif
- error->reset_count = i915_reset_count(&i915->gpu_error);
- error->suspend_count = i915->suspend_count;
- i915_params_copy(&error->params, &i915_modparams);
- memcpy(&error->device_info,
- INTEL_INFO(i915),
- sizeof(error->device_info));
- memcpy(&error->runtime_info,
- RUNTIME_INFO(i915),
- sizeof(error->runtime_info));
- error->driver_caps = i915->caps;
- }
- struct i915_gpu_coredump *
- i915_gpu_coredump_alloc(struct drm_i915_private *i915, gfp_t gfp)
- {
- struct i915_gpu_coredump *error;
- if (!i915_modparams.error_capture)
- return NULL;
- error = kzalloc(sizeof(*error), gfp);
- if (!error)
- return NULL;
- kref_init(&error->ref);
- error->i915 = i915;
- error->time = ktime_get_real();
- error->boottime = ktime_get_boottime();
- error->uptime = ktime_sub(ktime_get(), i915->gt.last_init_time);
- error->capture = jiffies;
- capture_gen(error);
- return error;
- }
- #define DAY_AS_SECONDS(x) (24 * 60 * 60 * (x))
- struct intel_gt_coredump *
- intel_gt_coredump_alloc(struct intel_gt *gt, gfp_t gfp)
- {
- struct intel_gt_coredump *gc;
- gc = kzalloc(sizeof(*gc), gfp);
- if (!gc)
- return NULL;
- gc->_gt = gt;
- gc->awake = intel_gt_pm_is_awake(gt);
- gt_record_regs(gc);
- gt_record_fences(gc);
- return gc;
- }
- struct i915_vma_compress *
- i915_vma_capture_prepare(struct intel_gt_coredump *gt)
- {
- struct i915_vma_compress *compress;
- compress = kmalloc(sizeof(*compress), ALLOW_FAIL);
- if (!compress)
- return NULL;
- if (!compress_init(compress)) {
- kfree(compress);
- return NULL;
- }
- gt_capture_prepare(gt);
- return compress;
- }
- void i915_vma_capture_finish(struct intel_gt_coredump *gt,
- struct i915_vma_compress *compress)
- {
- if (!compress)
- return;
- gt_capture_finish(gt);
- compress_fini(compress);
- kfree(compress);
- }
- struct i915_gpu_coredump *i915_gpu_coredump(struct drm_i915_private *i915)
- {
- struct i915_gpu_coredump *error;
- /* Check if GPU capture has been disabled */
- error = READ_ONCE(i915->gpu_error.first_error);
- if (IS_ERR(error))
- return error;
- error = i915_gpu_coredump_alloc(i915, ALLOW_FAIL);
- if (!error)
- return ERR_PTR(-ENOMEM);
- error->gt = intel_gt_coredump_alloc(&i915->gt, ALLOW_FAIL);
- if (error->gt) {
- struct i915_vma_compress *compress;
- compress = i915_vma_capture_prepare(error->gt);
- if (!compress) {
- kfree(error->gt);
- kfree(error);
- return ERR_PTR(-ENOMEM);
- }
- gt_record_engines(error->gt, compress);
- if (INTEL_INFO(i915)->has_gt_uc)
- error->gt->uc = gt_record_uc(error->gt, compress);
- i915_vma_capture_finish(error->gt, compress);
- error->simulated |= error->gt->simulated;
- }
- error->overlay = intel_overlay_capture_error_state(i915);
- error->display = intel_display_capture_error_state(i915);
- return error;
- }
- void i915_error_state_store(struct i915_gpu_coredump *error)
- {
- struct drm_i915_private *i915;
- static bool warned;
- if (IS_ERR_OR_NULL(error))
- return;
- i915 = error->i915;
- dev_info(i915->drm.dev, "%s\n", error_msg(error));
- if (error->simulated ||
- cmpxchg(&i915->gpu_error.first_error, NULL, error))
- return;
- i915_gpu_coredump_get(error);
- if (!xchg(&warned, true) &&
- ktime_get_real_seconds() - DRIVER_TIMESTAMP < DAY_AS_SECONDS(180)) {
- pr_info("GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.\n");
- pr_info("Please file a _new_ bug report at https://gitlab.freedesktop.org/drm/intel/issues/new.\n");
- pr_info("Please see https://gitlab.freedesktop.org/drm/intel/-/wikis/How-to-file-i915-bugs for details.\n");
- pr_info("drm/i915 developers can then reassign to the right component if it's not a kernel issue.\n");
- pr_info("The GPU crash dump is required to analyze GPU hangs, so please always attach it.\n");
- pr_info("GPU crash dump saved to /sys/class/drm/card%d/error\n",
- i915->drm.primary->index);
- }
- }
- /**
- * i915_capture_error_state - capture an error record for later analysis
- * @i915: i915 device
- *
- * Should be called when an error is detected (either a hang or an error
- * interrupt) to capture error state from the time of the error. Fills
- * out a structure which becomes available in debugfs for user level tools
- * to pick up.
- */
- void i915_capture_error_state(struct drm_i915_private *i915)
- {
- struct i915_gpu_coredump *error;
- error = i915_gpu_coredump(i915);
- if (IS_ERR(error)) {
- cmpxchg(&i915->gpu_error.first_error, NULL, error);
- return;
- }
- i915_error_state_store(error);
- i915_gpu_coredump_put(error);
- }
- struct i915_gpu_coredump *
- i915_first_error_state(struct drm_i915_private *i915)
- {
- struct i915_gpu_coredump *error;
- spin_lock_irq(&i915->gpu_error.lock);
- error = i915->gpu_error.first_error;
- if (!IS_ERR_OR_NULL(error))
- i915_gpu_coredump_get(error);
- spin_unlock_irq(&i915->gpu_error.lock);
- return error;
- }
- void i915_reset_error_state(struct drm_i915_private *i915)
- {
- struct i915_gpu_coredump *error;
- spin_lock_irq(&i915->gpu_error.lock);
- error = i915->gpu_error.first_error;
- if (error != ERR_PTR(-ENODEV)) /* if disabled, always disabled */
- i915->gpu_error.first_error = NULL;
- spin_unlock_irq(&i915->gpu_error.lock);
- if (!IS_ERR_OR_NULL(error))
- i915_gpu_coredump_put(error);
- }
- void i915_disable_error_state(struct drm_i915_private *i915, int err)
- {
- spin_lock_irq(&i915->gpu_error.lock);
- if (!i915->gpu_error.first_error)
- i915->gpu_error.first_error = ERR_PTR(err);
- spin_unlock_irq(&i915->gpu_error.lock);
- }