/drivers/gpu/drm/i915/i915_gpu_error.c
C | 1684 lines | 1280 code | 297 blank | 107 comment | 232 complexity | 026f20757a695fced9b20e63cc878623 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
- /*
- * 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 <generated/utsrelease.h>
- #include <linux/stop_machine.h>
- #include <linux/zlib.h>
- #include "i915_drv.h"
- static const char *engine_str(int engine)
- {
- switch (engine) {
- case RCS: return "render";
- case VCS: return "bsd";
- case BCS: return "blt";
- case VECS: return "vebox";
- case VCS2: return "bsd2";
- default: return "";
- }
- }
- static const char *tiling_flag(int tiling)
- {
- switch (tiling) {
- default:
- case I915_TILING_NONE: return "";
- case I915_TILING_X: return " X";
- case I915_TILING_Y: return " Y";
- }
- }
- static const char *dirty_flag(int dirty)
- {
- return dirty ? " dirty" : "";
- }
- static const char *purgeable_flag(int purgeable)
- {
- return purgeable ? " purgeable" : "";
- }
- static bool __i915_error_ok(struct drm_i915_error_state_buf *e)
- {
- if (!e->err && WARN(e->bytes > (e->size - 1), "overflow")) {
- e->err = -ENOSPC;
- return false;
- }
- if (e->bytes == e->size - 1 || e->err)
- return false;
- return true;
- }
- static bool __i915_error_seek(struct drm_i915_error_state_buf *e,
- unsigned len)
- {
- if (e->pos + len <= e->start) {
- e->pos += len;
- return false;
- }
- /* First vsnprintf needs to fit in its entirety for memmove */
- if (len >= e->size) {
- e->err = -EIO;
- return false;
- }
- return true;
- }
- static void __i915_error_advance(struct drm_i915_error_state_buf *e,
- unsigned len)
- {
- /* If this is first printf in this window, adjust it so that
- * start position matches start of the buffer
- */
- if (e->pos < e->start) {
- const size_t off = e->start - e->pos;
- /* Should not happen but be paranoid */
- if (off > len || e->bytes) {
- e->err = -EIO;
- return;
- }
- memmove(e->buf, e->buf + off, len - off);
- e->bytes = len - off;
- e->pos = e->start;
- return;
- }
- e->bytes += len;
- e->pos += len;
- }
- __printf(2, 0)
- static void i915_error_vprintf(struct drm_i915_error_state_buf *e,
- const char *f, va_list args)
- {
- unsigned len;
- if (!__i915_error_ok(e))
- return;
- /* Seek the first printf which is hits start position */
- if (e->pos < e->start) {
- va_list tmp;
- va_copy(tmp, args);
- len = vsnprintf(NULL, 0, f, tmp);
- va_end(tmp);
- if (!__i915_error_seek(e, len))
- return;
- }
- len = vsnprintf(e->buf + e->bytes, e->size - e->bytes, f, args);
- if (len >= e->size - e->bytes)
- len = e->size - e->bytes - 1;
- __i915_error_advance(e, len);
- }
- static void i915_error_puts(struct drm_i915_error_state_buf *e,
- const char *str)
- {
- unsigned len;
- if (!__i915_error_ok(e))
- return;
- len = strlen(str);
- /* Seek the first printf which is hits start position */
- if (e->pos < e->start) {
- if (!__i915_error_seek(e, len))
- return;
- }
- if (len >= e->size - e->bytes)
- len = e->size - e->bytes - 1;
- memcpy(e->buf + e->bytes, str, len);
- __i915_error_advance(e, len);
- }
- #define err_printf(e, ...) i915_error_printf(e, __VA_ARGS__)
- #define err_puts(e, s) i915_error_puts(e, s)
- #ifdef CONFIG_DRM_I915_COMPRESS_ERROR
- struct compress {
- struct z_stream_s zstream;
- void *tmp;
- };
- static bool compress_init(struct compress *c)
- {
- struct z_stream_s *zstream = memset(&c->zstream, 0, sizeof(c->zstream));
- zstream->workspace =
- kmalloc(zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL),
- GFP_ATOMIC | __GFP_NOWARN);
- if (!zstream->workspace)
- return false;
- if (zlib_deflateInit(zstream, Z_DEFAULT_COMPRESSION) != Z_OK) {
- kfree(zstream->workspace);
- return false;
- }
- c->tmp = NULL;
- if (i915_has_memcpy_from_wc())
- c->tmp = (void *)__get_free_page(GFP_ATOMIC | __GFP_NOWARN);
- return true;
- }
- static int compress_page(struct compress *c,
- void *src,
- struct drm_i915_error_object *dst)
- {
- struct z_stream_s *zstream = &c->zstream;
- zstream->next_in = src;
- if (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) {
- unsigned long page;
- page = __get_free_page(GFP_ATOMIC | __GFP_NOWARN);
- if (!page)
- return -ENOMEM;
- dst->pages[dst->page_count++] = (void *)page;
- zstream->next_out = (void *)page;
- zstream->avail_out = PAGE_SIZE;
- }
- if (zlib_deflate(zstream, Z_SYNC_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 void compress_fini(struct compress *c,
- struct drm_i915_error_object *dst)
- {
- struct z_stream_s *zstream = &c->zstream;
- if (dst) {
- zlib_deflate(zstream, Z_FINISH);
- dst->unused = zstream->avail_out;
- }
- zlib_deflateEnd(zstream);
- kfree(zstream->workspace);
- if (c->tmp)
- free_page((unsigned long)c->tmp);
- }
- static void err_compression_marker(struct drm_i915_error_state_buf *m)
- {
- err_puts(m, ":");
- }
- #else
- struct compress {
- };
- static bool compress_init(struct compress *c)
- {
- return true;
- }
- static int compress_page(struct compress *c,
- void *src,
- struct drm_i915_error_object *dst)
- {
- unsigned long page;
- void *ptr;
- page = __get_free_page(GFP_ATOMIC | __GFP_NOWARN);
- if (!page)
- return -ENOMEM;
- ptr = (void *)page;
- if (!i915_memcpy_from_wc(ptr, src, PAGE_SIZE))
- memcpy(ptr, src, PAGE_SIZE);
- dst->pages[dst->page_count++] = ptr;
- return 0;
- }
- static void compress_fini(struct compress *c,
- struct drm_i915_error_object *dst)
- {
- }
- static void err_compression_marker(struct drm_i915_error_state_buf *m)
- {
- err_puts(m, "~");
- }
- #endif
- static void print_error_buffers(struct drm_i915_error_state_buf *m,
- const char *name,
- struct drm_i915_error_buffer *err,
- int count)
- {
- int i;
- err_printf(m, "%s [%d]:\n", name, count);
- while (count--) {
- err_printf(m, " %08x_%08x %8u %02x %02x [ ",
- upper_32_bits(err->gtt_offset),
- lower_32_bits(err->gtt_offset),
- err->size,
- err->read_domains,
- err->write_domain);
- for (i = 0; i < I915_NUM_ENGINES; i++)
- err_printf(m, "%02x ", err->rseqno[i]);
- err_printf(m, "] %02x", err->wseqno);
- err_puts(m, tiling_flag(err->tiling));
- err_puts(m, dirty_flag(err->dirty));
- err_puts(m, purgeable_flag(err->purgeable));
- err_puts(m, err->userptr ? " userptr" : "");
- err_puts(m, err->engine != -1 ? " " : "");
- err_puts(m, engine_str(err->engine));
- err_puts(m, i915_cache_level_str(m->i915, err->cache_level));
- if (err->name)
- err_printf(m, " (name: %d)", err->name);
- if (err->fence_reg != I915_FENCE_REG_NONE)
- err_printf(m, " (fence: %d)", err->fence_reg);
- err_puts(m, "\n");
- err++;
- }
- }
- static void error_print_instdone(struct drm_i915_error_state_buf *m,
- struct drm_i915_error_engine *ee)
- {
- int slice;
- int subslice;
- err_printf(m, " INSTDONE: 0x%08x\n",
- ee->instdone.instdone);
- if (ee->engine_id != RCS || 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, 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, slice, subslice)
- err_printf(m, " ROW_INSTDONE[%d][%d]: 0x%08x\n",
- slice, subslice,
- ee->instdone.row[slice][subslice]);
- }
- static void error_print_request(struct drm_i915_error_state_buf *m,
- const char *prefix,
- struct drm_i915_error_request *erq)
- {
- if (!erq->seqno)
- return;
- err_printf(m, "%s pid %d, ban score %d, seqno %8x:%08x, emitted %dms ago, head %08x, tail %08x\n",
- prefix, erq->pid, erq->ban_score,
- erq->context, erq->seqno,
- jiffies_to_msecs(jiffies - erq->jiffies),
- erq->head, erq->tail);
- }
- static void error_print_engine(struct drm_i915_error_state_buf *m,
- struct drm_i915_error_engine *ee)
- {
- err_printf(m, "%s command stream:\n", engine_str(ee->engine_id));
- 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);
- error_print_instdone(m, ee);
- if (ee->batchbuffer) {
- u64 start = ee->batchbuffer->gtt_offset;
- u64 end = start + ee->batchbuffer->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);
- err_printf(m, " SYNC_0: 0x%08x\n",
- ee->semaphore_mboxes[0]);
- err_printf(m, " SYNC_1: 0x%08x\n",
- ee->semaphore_mboxes[1]);
- if (HAS_VEBOX(m->i915))
- err_printf(m, " SYNC_2: 0x%08x\n",
- ee->semaphore_mboxes[2]);
- }
- if (USES_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, " seqno: 0x%08x\n", ee->seqno);
- err_printf(m, " last_seqno: 0x%08x\n", ee->last_seqno);
- err_printf(m, " waiting: %s\n", yesno(ee->waiting));
- err_printf(m, " ring->head: 0x%08x\n", ee->cpu_ring_head);
- err_printf(m, " ring->tail: 0x%08x\n", ee->cpu_ring_tail);
- err_printf(m, " hangcheck stall: %s\n", yesno(ee->hangcheck_stalled));
- err_printf(m, " hangcheck action: %s\n",
- hangcheck_action_to_str(ee->hangcheck_action));
- err_printf(m, " hangcheck action timestamp: %lu, %u ms ago\n",
- ee->hangcheck_timestamp,
- jiffies_to_msecs(jiffies - ee->hangcheck_timestamp));
- error_print_request(m, " ELSP[0]: ", &ee->execlist[0]);
- error_print_request(m, " ELSP[1]: ", &ee->execlist[1]);
- }
- 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 int
- ascii85_encode_len(int len)
- {
- return DIV_ROUND_UP(len, 4);
- }
- static bool
- ascii85_encode(u32 in, char *out)
- {
- int i;
- if (in == 0)
- return false;
- out[5] = '\0';
- for (i = 5; i--; ) {
- out[i] = '!' + in % 85;
- in /= 85;
- }
- return true;
- }
- static void print_error_obj(struct drm_i915_error_state_buf *m,
- struct intel_engine_cs *engine,
- const char *name,
- struct drm_i915_error_object *obj)
- {
- char out[6];
- int page;
- if (!obj)
- return;
- if (name) {
- err_printf(m, "%s --- %s = 0x%08x %08x\n",
- engine ? engine->name : "global", name,
- upper_32_bits(obj->gtt_offset),
- lower_32_bits(obj->gtt_offset));
- }
- err_compression_marker(m);
- for (page = 0; page < obj->page_count; page++) {
- int i, len;
- len = PAGE_SIZE;
- if (page == obj->page_count - 1)
- len -= obj->unused;
- len = ascii85_encode_len(len);
- for (i = 0; i < len; i++) {
- if (ascii85_encode(obj->pages[page][i], out))
- err_puts(m, out);
- else
- err_puts(m, "z");
- }
- }
- err_puts(m, "\n");
- }
- static void err_print_capabilities(struct drm_i915_error_state_buf *m,
- const struct intel_device_info *info)
- {
- #define PRINT_FLAG(x) err_printf(m, #x ": %s\n", yesno(info->x))
- DEV_INFO_FOR_EACH_FLAG(PRINT_FLAG);
- #undef PRINT_FLAG
- }
- int i915_error_state_to_str(struct drm_i915_error_state_buf *m,
- const struct i915_error_state_file_priv *error_priv)
- {
- struct drm_i915_private *dev_priv = error_priv->i915;
- struct pci_dev *pdev = dev_priv->drm.pdev;
- struct drm_i915_error_state *error = error_priv->error;
- struct drm_i915_error_object *obj;
- int i, j;
- if (!error) {
- err_printf(m, "no error state collected\n");
- goto out;
- }
- err_printf(m, "%s\n", error->error_msg);
- err_printf(m, "Kernel: " UTS_RELEASE "\n");
- err_printf(m, "Time: %ld s %ld us\n",
- error->time.tv_sec, error->time.tv_usec);
- err_printf(m, "Boottime: %ld s %ld us\n",
- error->boottime.tv_sec, error->boottime.tv_usec);
- err_printf(m, "Uptime: %ld s %ld us\n",
- error->uptime.tv_sec, error->uptime.tv_usec);
- err_print_capabilities(m, &error->device_info);
- for (i = 0; i < ARRAY_SIZE(error->engine); i++) {
- if (error->engine[i].hangcheck_stalled &&
- error->engine[i].pid != -1) {
- err_printf(m, "Active process (on ring %s): %s [%d], context bans %d\n",
- engine_str(i),
- error->engine[i].comm,
- error->engine[i].pid,
- error->engine[i].context_bans);
- }
- }
- 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, "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);
- err_printf(m, "IOMMU enabled?: %d\n", error->iommu);
- if (HAS_CSR(dev_priv)) {
- struct intel_csr *csr = &dev_priv->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, "EIR: 0x%08x\n", error->eir);
- err_printf(m, "IER: 0x%08x\n", error->ier);
- if (INTEL_GEN(dev_priv) >= 8) {
- for (i = 0; i < 4; i++)
- err_printf(m, "GTIER gt %d: 0x%08x\n", i,
- error->gtier[i]);
- } else if (HAS_PCH_SPLIT(dev_priv) || IS_VALLEYVIEW(dev_priv))
- err_printf(m, "GTIER: 0x%08x\n", error->gtier[0]);
- err_printf(m, "PGTBL_ER: 0x%08x\n", error->pgtbl_er);
- err_printf(m, "FORCEWAKE: 0x%08x\n", error->forcewake);
- err_printf(m, "DERRMR: 0x%08x\n", error->derrmr);
- err_printf(m, "CCID: 0x%08x\n", error->ccid);
- err_printf(m, "Missed interrupts: 0x%08lx\n", dev_priv->gpu_error.missed_irq_rings);
- for (i = 0; i < dev_priv->num_fence_regs; i++)
- err_printf(m, " fence[%d] = %08llx\n", i, error->fence[i]);
- if (INTEL_GEN(dev_priv) >= 6) {
- err_printf(m, "ERROR: 0x%08x\n", error->error);
- if (INTEL_GEN(dev_priv) >= 8)
- err_printf(m, "FAULT_TLB_DATA: 0x%08x 0x%08x\n",
- error->fault_data1, error->fault_data0);
- err_printf(m, "DONE_REG: 0x%08x\n", error->done_reg);
- }
- if (IS_GEN7(dev_priv))
- err_printf(m, "ERR_INT: 0x%08x\n", error->err_int);
- for (i = 0; i < ARRAY_SIZE(error->engine); i++) {
- if (error->engine[i].engine_id != -1)
- error_print_engine(m, &error->engine[i]);
- }
- for (i = 0; i < ARRAY_SIZE(error->active_vm); i++) {
- char buf[128];
- int len, first = 1;
- if (!error->active_vm[i])
- break;
- len = scnprintf(buf, sizeof(buf), "Active (");
- for (j = 0; j < ARRAY_SIZE(error->engine); j++) {
- if (error->engine[j].vm != error->active_vm[i])
- continue;
- len += scnprintf(buf + len, sizeof(buf), "%s%s",
- first ? "" : ", ",
- dev_priv->engine[j]->name);
- first = 0;
- }
- scnprintf(buf + len, sizeof(buf), ")");
- print_error_buffers(m, buf,
- error->active_bo[i],
- error->active_bo_count[i]);
- }
- print_error_buffers(m, "Pinned (global)",
- error->pinned_bo,
- error->pinned_bo_count);
- for (i = 0; i < ARRAY_SIZE(error->engine); i++) {
- struct drm_i915_error_engine *ee = &error->engine[i];
- obj = ee->batchbuffer;
- if (obj) {
- err_puts(m, dev_priv->engine[i]->name);
- if (ee->pid != -1)
- err_printf(m, " (submitted by %s [%d], bans %d)",
- ee->comm,
- ee->pid,
- ee->context_bans);
- err_printf(m, " --- gtt_offset = 0x%08x %08x\n",
- upper_32_bits(obj->gtt_offset),
- lower_32_bits(obj->gtt_offset));
- print_error_obj(m, dev_priv->engine[i], NULL, obj);
- }
- if (ee->num_requests) {
- err_printf(m, "%s --- %d requests\n",
- dev_priv->engine[i]->name,
- ee->num_requests);
- for (j = 0; j < ee->num_requests; j++)
- error_print_request(m, " ", &ee->requests[j]);
- }
- if (IS_ERR(ee->waiters)) {
- err_printf(m, "%s --- ? waiters [unable to acquire spinlock]\n",
- dev_priv->engine[i]->name);
- } else if (ee->num_waiters) {
- err_printf(m, "%s --- %d waiters\n",
- dev_priv->engine[i]->name,
- ee->num_waiters);
- for (j = 0; j < ee->num_waiters; j++) {
- err_printf(m, " seqno 0x%08x for %s [%d]\n",
- ee->waiters[j].seqno,
- ee->waiters[j].comm,
- ee->waiters[j].pid);
- }
- }
- print_error_obj(m, dev_priv->engine[i],
- "ringbuffer", ee->ringbuffer);
- print_error_obj(m, dev_priv->engine[i],
- "HW Status", ee->hws_page);
- print_error_obj(m, dev_priv->engine[i],
- "HW context", ee->ctx);
- print_error_obj(m, dev_priv->engine[i],
- "WA context", ee->wa_ctx);
- print_error_obj(m, dev_priv->engine[i],
- "WA batchbuffer", ee->wa_batchbuffer);
- }
- print_error_obj(m, NULL, "Semaphores", error->semaphore);
- print_error_obj(m, NULL, "GuC log buffer", error->guc_log);
- if (error->overlay)
- intel_overlay_print_error_state(m, error->overlay);
- if (error->display)
- intel_display_print_error_state(m, dev_priv, error->display);
- out:
- if (m->bytes == 0 && m->err)
- return m->err;
- return 0;
- }
- int i915_error_state_buf_init(struct drm_i915_error_state_buf *ebuf,
- struct drm_i915_private *i915,
- size_t count, loff_t pos)
- {
- memset(ebuf, 0, sizeof(*ebuf));
- ebuf->i915 = i915;
- /* We need to have enough room to store any i915_error_state printf
- * so that we can move it to start position.
- */
- ebuf->size = count + 1 > PAGE_SIZE ? count + 1 : PAGE_SIZE;
- ebuf->buf = kmalloc(ebuf->size,
- GFP_TEMPORARY | __GFP_NORETRY | __GFP_NOWARN);
- if (ebuf->buf == NULL) {
- ebuf->size = PAGE_SIZE;
- ebuf->buf = kmalloc(ebuf->size, GFP_TEMPORARY);
- }
- if (ebuf->buf == NULL) {
- ebuf->size = 128;
- ebuf->buf = kmalloc(ebuf->size, GFP_TEMPORARY);
- }
- if (ebuf->buf == NULL)
- return -ENOMEM;
- ebuf->start = pos;
- return 0;
- }
- static void i915_error_object_free(struct drm_i915_error_object *obj)
- {
- int page;
- if (obj == NULL)
- return;
- for (page = 0; page < obj->page_count; page++)
- free_page((unsigned long)obj->pages[page]);
- kfree(obj);
- }
- static void i915_error_state_free(struct kref *error_ref)
- {
- struct drm_i915_error_state *error = container_of(error_ref,
- typeof(*error), ref);
- int i;
- for (i = 0; i < ARRAY_SIZE(error->engine); i++) {
- struct drm_i915_error_engine *ee = &error->engine[i];
- i915_error_object_free(ee->batchbuffer);
- i915_error_object_free(ee->wa_batchbuffer);
- i915_error_object_free(ee->ringbuffer);
- i915_error_object_free(ee->hws_page);
- i915_error_object_free(ee->ctx);
- i915_error_object_free(ee->wa_ctx);
- kfree(ee->requests);
- if (!IS_ERR_OR_NULL(ee->waiters))
- kfree(ee->waiters);
- }
- i915_error_object_free(error->semaphore);
- i915_error_object_free(error->guc_log);
- for (i = 0; i < ARRAY_SIZE(error->active_bo); i++)
- kfree(error->active_bo[i]);
- kfree(error->pinned_bo);
- kfree(error->overlay);
- kfree(error->display);
- kfree(error);
- }
- static struct drm_i915_error_object *
- i915_error_object_create(struct drm_i915_private *i915,
- struct i915_vma *vma)
- {
- struct i915_ggtt *ggtt = &i915->ggtt;
- const u64 slot = ggtt->error_capture.start;
- struct drm_i915_error_object *dst;
- struct compress compress;
- unsigned long num_pages;
- struct sgt_iter iter;
- dma_addr_t dma;
- if (!vma)
- 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 *),
- GFP_ATOMIC | __GFP_NOWARN);
- if (!dst)
- return NULL;
- dst->gtt_offset = vma->node.start;
- dst->gtt_size = vma->node.size;
- dst->page_count = 0;
- dst->unused = 0;
- if (!compress_init(&compress)) {
- kfree(dst);
- return NULL;
- }
- for_each_sgt_dma(dma, iter, vma->pages) {
- void __iomem *s;
- int ret;
- ggtt->base.insert_page(&ggtt->base, dma, slot,
- I915_CACHE_NONE, 0);
- s = io_mapping_map_atomic_wc(&ggtt->mappable, slot);
- ret = compress_page(&compress, (void __force *)s, dst);
- io_mapping_unmap_atomic(s);
- if (ret)
- goto unwind;
- }
- goto out;
- unwind:
- while (dst->page_count--)
- free_page((unsigned long)dst->pages[dst->page_count]);
- kfree(dst);
- dst = NULL;
- out:
- compress_fini(&compress, dst);
- ggtt->base.clear_range(&ggtt->base, slot, PAGE_SIZE);
- return dst;
- }
- /* The error capture is special as tries to run underneath the normal
- * locking rules - so we use the raw version of the i915_gem_active lookup.
- */
- static inline uint32_t
- __active_get_seqno(struct i915_gem_active *active)
- {
- struct drm_i915_gem_request *request;
- request = __i915_gem_active_peek(active);
- return request ? request->global_seqno : 0;
- }
- static inline int
- __active_get_engine_id(struct i915_gem_active *active)
- {
- struct drm_i915_gem_request *request;
- request = __i915_gem_active_peek(active);
- return request ? request->engine->id : -1;
- }
- static void capture_bo(struct drm_i915_error_buffer *err,
- struct i915_vma *vma)
- {
- struct drm_i915_gem_object *obj = vma->obj;
- int i;
- err->size = obj->base.size;
- err->name = obj->base.name;
- for (i = 0; i < I915_NUM_ENGINES; i++)
- err->rseqno[i] = __active_get_seqno(&vma->last_read[i]);
- err->wseqno = __active_get_seqno(&obj->frontbuffer_write);
- err->engine = __active_get_engine_id(&obj->frontbuffer_write);
- err->gtt_offset = vma->node.start;
- err->read_domains = obj->base.read_domains;
- err->write_domain = obj->base.write_domain;
- err->fence_reg = vma->fence ? vma->fence->id : -1;
- err->tiling = i915_gem_object_get_tiling(obj);
- err->dirty = obj->mm.dirty;
- err->purgeable = obj->mm.madv != I915_MADV_WILLNEED;
- err->userptr = obj->userptr.mm != NULL;
- err->cache_level = obj->cache_level;
- }
- static u32 capture_error_bo(struct drm_i915_error_buffer *err,
- int count, struct list_head *head,
- bool pinned_only)
- {
- struct i915_vma *vma;
- int i = 0;
- list_for_each_entry(vma, head, vm_link) {
- if (pinned_only && !i915_vma_is_pinned(vma))
- continue;
- capture_bo(err++, vma);
- if (++i == count)
- break;
- }
- return i;
- }
- /* 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 uint32_t i915_error_generate_code(struct drm_i915_private *dev_priv,
- struct drm_i915_error_state *error,
- int *engine_id)
- {
- uint32_t error_code = 0;
- int i;
- /* 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.
- */
- for (i = 0; i < I915_NUM_ENGINES; i++) {
- if (error->engine[i].hangcheck_stalled) {
- if (engine_id)
- *engine_id = i;
- return error->engine[i].ipehr ^
- error->engine[i].instdone.instdone;
- }
- }
- return error_code;
- }
- static void i915_gem_record_fences(struct drm_i915_private *dev_priv,
- struct drm_i915_error_state *error)
- {
- int i;
- if (IS_GEN3(dev_priv) || IS_GEN2(dev_priv)) {
- for (i = 0; i < dev_priv->num_fence_regs; i++)
- error->fence[i] = I915_READ(FENCE_REG(i));
- } else if (IS_GEN5(dev_priv) || IS_GEN4(dev_priv)) {
- for (i = 0; i < dev_priv->num_fence_regs; i++)
- error->fence[i] = I915_READ64(FENCE_REG_965_LO(i));
- } else if (INTEL_GEN(dev_priv) >= 6) {
- for (i = 0; i < dev_priv->num_fence_regs; i++)
- error->fence[i] = I915_READ64(FENCE_REG_GEN6_LO(i));
- }
- }
- static inline u32
- gen8_engine_sync_index(struct intel_engine_cs *engine,
- struct intel_engine_cs *other)
- {
- int idx;
- /*
- * rcs -> 0 = vcs, 1 = bcs, 2 = vecs, 3 = vcs2;
- * vcs -> 0 = bcs, 1 = vecs, 2 = vcs2, 3 = rcs;
- * bcs -> 0 = vecs, 1 = vcs2. 2 = rcs, 3 = vcs;
- * vecs -> 0 = vcs2, 1 = rcs, 2 = vcs, 3 = bcs;
- * vcs2 -> 0 = rcs, 1 = vcs, 2 = bcs, 3 = vecs;
- */
- idx = (other - engine) - 1;
- if (idx < 0)
- idx += I915_NUM_ENGINES;
- return idx;
- }
- static void gen8_record_semaphore_state(struct drm_i915_error_state *error,
- struct intel_engine_cs *engine,
- struct drm_i915_error_engine *ee)
- {
- struct drm_i915_private *dev_priv = engine->i915;
- struct intel_engine_cs *to;
- enum intel_engine_id id;
- if (!error->semaphore)
- return;
- for_each_engine(to, dev_priv, id) {
- int idx;
- u16 signal_offset;
- u32 *tmp;
- if (engine == to)
- continue;
- signal_offset =
- (GEN8_SIGNAL_OFFSET(engine, id) & (PAGE_SIZE - 1)) / 4;
- tmp = error->semaphore->pages[0];
- idx = gen8_engine_sync_index(engine, to);
- ee->semaphore_mboxes[idx] = tmp[signal_offset];
- }
- }
- static void gen6_record_semaphore_state(struct intel_engine_cs *engine,
- struct drm_i915_error_engine *ee)
- {
- struct drm_i915_private *dev_priv = engine->i915;
- ee->semaphore_mboxes[0] = I915_READ(RING_SYNC_0(engine->mmio_base));
- ee->semaphore_mboxes[1] = I915_READ(RING_SYNC_1(engine->mmio_base));
- if (HAS_VEBOX(dev_priv))
- ee->semaphore_mboxes[2] =
- I915_READ(RING_SYNC_2(engine->mmio_base));
- }
- static void error_record_engine_waiters(struct intel_engine_cs *engine,
- struct drm_i915_error_engine *ee)
- {
- struct intel_breadcrumbs *b = &engine->breadcrumbs;
- struct drm_i915_error_waiter *waiter;
- struct rb_node *rb;
- int count;
- ee->num_waiters = 0;
- ee->waiters = NULL;
- if (RB_EMPTY_ROOT(&b->waiters))
- return;
- if (!spin_trylock_irq(&b->lock)) {
- ee->waiters = ERR_PTR(-EDEADLK);
- return;
- }
- count = 0;
- for (rb = rb_first(&b->waiters); rb != NULL; rb = rb_next(rb))
- count++;
- spin_unlock_irq(&b->lock);
- waiter = NULL;
- if (count)
- waiter = kmalloc_array(count,
- sizeof(struct drm_i915_error_waiter),
- GFP_ATOMIC);
- if (!waiter)
- return;
- if (!spin_trylock_irq(&b->lock)) {
- kfree(waiter);
- ee->waiters = ERR_PTR(-EDEADLK);
- return;
- }
- ee->waiters = waiter;
- for (rb = rb_first(&b->waiters); rb; rb = rb_next(rb)) {
- struct intel_wait *w = container_of(rb, typeof(*w), node);
- strcpy(waiter->comm, w->tsk->comm);
- waiter->pid = w->tsk->pid;
- waiter->seqno = w->seqno;
- waiter++;
- if (++ee->num_waiters == count)
- break;
- }
- spin_unlock_irq(&b->lock);
- }
- static void error_record_engine_registers(struct drm_i915_error_state *error,
- struct intel_engine_cs *engine,
- struct drm_i915_error_engine *ee)
- {
- struct drm_i915_private *dev_priv = engine->i915;
- if (INTEL_GEN(dev_priv) >= 6) {
- ee->rc_psmi = I915_READ(RING_PSMI_CTL(engine->mmio_base));
- ee->fault_reg = I915_READ(RING_FAULT_REG(engine));
- if (INTEL_GEN(dev_priv) >= 8)
- gen8_record_semaphore_state(error, engine, ee);
- else
- gen6_record_semaphore_state(engine, ee);
- }
- if (INTEL_GEN(dev_priv) >= 4) {
- ee->faddr = I915_READ(RING_DMA_FADD(engine->mmio_base));
- ee->ipeir = I915_READ(RING_IPEIR(engine->mmio_base));
- ee->ipehr = I915_READ(RING_IPEHR(engine->mmio_base));
- ee->instps = I915_READ(RING_INSTPS(engine->mmio_base));
- ee->bbaddr = I915_READ(RING_BBADDR(engine->mmio_base));
- if (INTEL_GEN(dev_priv) >= 8) {
- ee->faddr |= (u64) I915_READ(RING_DMA_FADD_UDW(engine->mmio_base)) << 32;
- ee->bbaddr |= (u64) I915_READ(RING_BBADDR_UDW(engine->mmio_base)) << 32;
- }
- ee->bbstate = I915_READ(RING_BBSTATE(engine->mmio_base));
- } else {
- ee->faddr = I915_READ(DMA_FADD_I8XX);
- ee->ipeir = I915_READ(IPEIR);
- ee->ipehr = I915_READ(IPEHR);
- }
- intel_engine_get_instdone(engine, &ee->instdone);
- ee->waiting = intel_engine_has_waiter(engine);
- ee->instpm = I915_READ(RING_INSTPM(engine->mmio_base));
- ee->acthd = intel_engine_get_active_head(engine);
- ee->seqno = intel_engine_get_seqno(engine);
- ee->last_seqno = intel_engine_last_submit(engine);
- ee->start = I915_READ_START(engine);
- ee->head = I915_READ_HEAD(engine);
- ee->tail = I915_READ_TAIL(engine);
- ee->ctl = I915_READ_CTL(engine);
- if (INTEL_GEN(dev_priv) > 2)
- ee->mode = I915_READ_MODE(engine);
- if (!HWS_NEEDS_PHYSICAL(dev_priv)) {
- i915_reg_t mmio;
- if (IS_GEN7(dev_priv)) {
- switch (engine->id) {
- default:
- case RCS:
- mmio = RENDER_HWS_PGA_GEN7;
- break;
- case BCS:
- mmio = BLT_HWS_PGA_GEN7;
- break;
- case VCS:
- mmio = BSD_HWS_PGA_GEN7;
- break;
- case VECS:
- mmio = VEBOX_HWS_PGA_GEN7;
- break;
- }
- } else if (IS_GEN6(engine->i915)) {
- mmio = RING_HWS_PGA_GEN6(engine->mmio_base);
- } else {
- /* XXX: gen8 returns to sanity */
- mmio = RING_HWS_PGA(engine->mmio_base);
- }
- ee->hws = I915_READ(mmio);
- }
- ee->hangcheck_timestamp = engine->hangcheck.action_timestamp;
- ee->hangcheck_action = engine->hangcheck.action;
- ee->hangcheck_stalled = engine->hangcheck.stalled;
- if (USES_PPGTT(dev_priv)) {
- int i;
- ee->vm_info.gfx_mode = I915_READ(RING_MODE_GEN7(engine));
- if (IS_GEN6(dev_priv))
- ee->vm_info.pp_dir_base =
- I915_READ(RING_PP_DIR_BASE_READ(engine));
- else if (IS_GEN7(dev_priv))
- ee->vm_info.pp_dir_base =
- I915_READ(RING_PP_DIR_BASE(engine));
- else if (INTEL_GEN(dev_priv) >= 8)
- for (i = 0; i < 4; i++) {
- ee->vm_info.pdp[i] =
- I915_READ(GEN8_RING_PDP_UDW(engine, i));
- ee->vm_info.pdp[i] <<= 32;
- ee->vm_info.pdp[i] |=
- I915_READ(GEN8_RING_PDP_LDW(engine, i));
- }
- }
- }
- static void record_request(struct drm_i915_gem_request *request,
- struct drm_i915_error_request *erq)
- {
- erq->context = request->ctx->hw_id;
- erq->ban_score = request->ctx->ban_score;
- erq->seqno = request->global_seqno;
- erq->jiffies = request->emitted_jiffies;
- erq->head = request->head;
- erq->tail = request->tail;
- rcu_read_lock();
- erq->pid = request->ctx->pid ? pid_nr(request->ctx->pid) : 0;
- rcu_read_unlock();
- }
- static void engine_record_requests(struct intel_engine_cs *engine,
- struct drm_i915_gem_request *first,
- struct drm_i915_error_engine *ee)
- {
- struct drm_i915_gem_request *request;
- int count;
- count = 0;
- request = first;
- list_for_each_entry_from(request, &engine->timeline->requests, link)
- count++;
- if (!count)
- return;
- ee->requests = kcalloc(count, sizeof(*ee->requests), GFP_ATOMIC);
- if (!ee->requests)
- return;
- ee->num_requests = count;
- count = 0;
- request = first;
- list_for_each_entry_from(request, &engine->timeline->requests, link) {
- if (count >= ee->num_requests) {
- /*
- * If the ring request list was changed in
- * between the point where the error request
- * list was created and dimensioned and this
- * point then just exit early to avoid crashes.
- *
- * We don't need to communicate that the
- * request list changed state during error
- * state capture and that the error state is
- * slightly incorrect as a consequence since we
- * are typically only interested in the request
- * list state at the point of error state
- * capture, not in any changes happening during
- * the capture.
- */
- break;
- }
- record_request(request, &ee->requests[count++]);
- }
- ee->num_requests = count;
- }
- static void error_record_engine_execlists(struct intel_engine_cs *engine,
- struct drm_i915_error_engine *ee)
- {
- unsigned int n;
- for (n = 0; n < ARRAY_SIZE(engine->execlist_port); n++)
- if (engine->execlist_port[n].request)
- record_request(engine->execlist_port[n].request,
- &ee->execlist[n]);
- }
- static void i915_gem_record_rings(struct drm_i915_private *dev_priv,
- struct drm_i915_error_state *error)
- {
- struct i915_ggtt *ggtt = &dev_priv->ggtt;
- int i;
- error->semaphore =
- i915_error_object_create(dev_priv, dev_priv->semaphore);
- for (i = 0; i < I915_NUM_ENGINES; i++) {
- struct intel_engine_cs *engine = dev_priv->engine[i];
- struct drm_i915_error_engine *ee = &error->engine[i];
- struct drm_i915_gem_request *request;
- ee->pid = -1;
- ee->engine_id = -1;
- if (!engine)
- continue;
- ee->engine_id = i;
- error_record_engine_registers(error, engine, ee);
- error_record_engine_waiters(engine, ee);
- error_record_engine_execlists(engine, ee);
- request = i915_gem_find_active_request(engine);
- if (request) {
- struct intel_ring *ring;
- struct pid *pid;
- ee->vm = request->ctx->ppgtt ?
- &request->ctx->ppgtt->base : &ggtt->base;
- /* We need to copy these to an anonymous buffer
- * as the simplest method to avoid being overwritten
- * by userspace.
- */
- ee->batchbuffer =
- i915_error_object_create(dev_priv,
- request->batch);
- if (HAS_BROKEN_CS_TLB(dev_priv))
- ee->wa_batchbuffer =
- i915_error_object_create(dev_priv,
- engine->scratch);
- ee->ctx =
- i915_error_object_create(dev_priv,
- request->ctx->engine[i].state);
- pid = request->ctx->pid;
- if (pid) {
- struct task_struct *task;
- rcu_read_lock();
- task = pid_task(pid, PIDTYPE_PID);
- if (task) {
- strcpy(ee->comm, task->comm);
- ee->pid = task->pid;
- }
- rcu_read_unlock();
- }
- error->simulated |=
- i915_gem_context_no_error_capture(request->ctx);
- ee->rq_head = request->head;
- ee->rq_post = request->postfix;
- ee->rq_tail = request->tail;
- ring = request->ring;
- ee->cpu_ring_head = ring->head;
- ee->cpu_ring_tail = ring->tail;
- ee->ringbuffer =
- i915_error_object_create(dev_priv, ring->vma);
- engine_record_requests(engine, request, ee);
- }
- ee->hws_page =
- i915_error_object_create(dev_priv,
- engine->status_page.vma);
- ee->wa_ctx =
- i915_error_object_create(dev_priv, engine->wa_ctx.vma);
- }
- }
- static void i915_gem_capture_vm(struct drm_i915_private *dev_priv,
- struct drm_i915_error_state *error,
- struct i915_address_space *vm,
- int idx)
- {
- struct drm_i915_error_buffer *active_bo;
- struct i915_vma *vma;
- int count;
- count = 0;
- list_for_each_entry(vma, &vm->active_list, vm_link)
- count++;
- active_bo = NULL;
- if (count)
- active_bo = kcalloc(count, sizeof(*active_bo), GFP_ATOMIC);
- if (active_bo)
- count = capture_error_bo(active_bo, count, &vm->active_list, false);
- else
- count = 0;
- error->active_vm[idx] = vm;
- error->active_bo[idx] = active_bo;
- error->active_bo_count[idx] = count;
- }
- static void i915_capture_active_buffers(struct drm_i915_private *dev_priv,
- struct drm_i915_error_state *error)
- {
- int cnt = 0, i, j;
- BUILD_BUG_ON(ARRAY_SIZE(error->engine) > ARRAY_SIZE(error->active_bo));
- BUILD_BUG_ON(ARRAY_SIZE(error->active_bo) != ARRAY_SIZE(error->active_vm));
- BUILD_BUG_ON(ARRAY_SIZE(error->active_bo) != ARRAY_SIZE(error->active_bo_count));
- /* Scan each engine looking for unique active contexts/vm */
- for (i = 0; i < ARRAY_SIZE(error->engine); i++) {
- struct drm_i915_error_engine *ee = &error->engine[i];
- bool found;
- if (!ee->vm)
- continue;
- found = false;
- for (j = 0; j < i && !found; j++)
- found = error->engine[j].vm == ee->vm;
- if (!found)
- i915_gem_capture_vm(dev_priv, error, ee->vm, cnt++);
- }
- }
- static void i915_capture_pinned_buffers(struct drm_i915_private *dev_priv,
- struct drm_i915_error_state *error)
- {
- struct i915_address_space *vm = &dev_priv->ggtt.base;
- struct drm_i915_error_buffer *bo;
- struct i915_vma *vma;
- int count_inactive, count_active;
- count_inactive = 0;
- list_for_each_entry(vma, &vm->active_list, vm_link)
- count_inactive++;
- count_active = 0;
- list_for_each_entry(vma, &vm->inactive_list, vm_link)
- count_active++;
- bo = NULL;
- if (count_inactive + count_active)
- bo = kcalloc(count_inactive + count_active,
- sizeof(*bo), GFP_ATOMIC);
- if (!bo)
- return;
- count_inactive = capture_error_bo(bo, count_inactive,
- &vm->active_list, true);
- count_active = capture_error_bo(bo + count_inactive, count_active,
- &vm->inactive_list, true);
- error->pinned_bo_count = count_inactive + count_active;
- error->pinned_bo = bo;
- }
- static void i915_gem_capture_guc_log_buffer(struct drm_i915_private *dev_priv,
- struct drm_i915_error_state *error)
- {
- /* Capturing log buf contents won't be useful if logging was disabled */
- if (!dev_priv->guc.log.vma || (i915.guc_log_level < 0))
- return;
- error->guc_log = i915_error_object_create(dev_priv,
- dev_priv->guc.log.vma);
- }
- /* Capture all registers which don't fit into another category. */
- static void i915_capture_reg_state(struct drm_i915_private *dev_priv,
- struct drm_i915_error_state *error)
- {
- 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(dev_priv)) {
- error->gtier[0] = I915_READ(GTIER);
- error->ier = I915_READ(VLV_IER);
- error->forcewake = I915_READ_FW(FORCEWAKE_VLV);
- }
- if (IS_GEN7(dev_priv))
- error->err_int = I915_READ(GEN7_ERR_INT);
- if (INTEL_GEN(dev_priv) >= 8) {
- error->fault_data0 = I915_READ(GEN8_FAULT_TLB_DATA0);
- error->fault_data1 = I915_READ(GEN8_FAULT_TLB_DATA1);
- }
- if (IS_GEN6(dev_priv)) {
- error->forcewake = I915_READ_FW(FORCEWAKE);
- error->gab_ctl = I915_READ(GAB_CTL);
- error->gfx_mode = I915_READ(GFX_MODE);
- }
- /* 2: Registers which belong to multiple generations */
- if (INTEL_GEN(dev_priv) >= 7)
- error->forcewake = I915_READ_FW(FORCEWAKE_MT);
- if (INTEL_GEN(dev_priv) >= 6) {
- error->derrmr = I915_READ(DERRMR);
- error->error = I915_READ(ERROR_GEN6);
- error->done_reg = I915_READ(DONE_REG);
- }
- /* 3: Feature specific registers */
- if (IS_GEN6(dev_priv) || IS_GEN7(dev_priv)) {
- error->gam_ecochk = I915_READ(GAM_ECOCHK);
- error->gac_eco = I915_READ(GAC_ECO_BITS);
- }
- /* 4: Everything else */
- if (HAS_HW_CONTEXTS(dev_priv))
- error->ccid = I915_READ(CCID);
- if (INTEL_GEN(dev_priv) >= 8) {
- error->ier = I915_READ(GEN8_DE_MISC_IER);
- for (i = 0; i < 4; i++)
- error->gtier[i] = I915_READ(GEN8_GT_IER(i));
- } else if (HAS_PCH_SPLIT(dev_priv)) {
- error->ier = I915_READ(DEIER);
- error->gtier[0] = I915_READ(GTIER);
- } else if (IS_GEN2(dev_priv)) {
- error->ier = I915_READ16(IER);
- } else if (!IS_VALLEYVIEW(dev_priv)) {
- error->ier = I915_READ(IER);
- }
- error->eir = I915_READ(EIR);
- error->pgtbl_er = I915_READ(PGTBL_ER);
- }
- static void i915_error_capture_msg(struct drm_i915_private *dev_priv,
- struct drm_i915_error_state *error,
- u32 engine_mask,
- const char *error_msg)
- {
- u32 ecode;
- int engine_id = -1, len;
- ecode = i915_error_generate_code(dev_priv, error, &engine_id);
- len = scnprintf(error->error_msg, sizeof(error->error_msg),
- "GPU HANG: ecode %d:%d:0x%08x",
- INTEL_GEN(dev_priv), engine_id, ecode);
- if (engine_id != -1 && error->engine[engine_id].pid != -1)
- len += scnprintf(error->error_msg + len,
- sizeof(error->error_msg) - len,
- ", in %s [%d]",
- error->engine[engine_id].comm,
- error->engine[engine_id].pid);
- scnprintf(error->error_msg + len, sizeof(error->error_msg) - len,
- ", reason: %s, action: %s",
- error_msg,
- engine_mask ? "reset" : "continue");
- }
- static void i915_capture_gen_state(struct drm_i915_private *dev_priv,
- struct drm_i915_error_state *error)
- {
- error->iommu = -1;
- #ifdef CONFIG_INTEL_IOMMU
- error->iommu = intel_iommu_gfx_mapped;
- #endif
- error->reset_count = i915_reset_count(&dev_priv->gpu_error);
- error->suspend_count = dev_priv->suspend_count;
- memcpy(&error->device_info,
- INTEL_INFO(dev_priv),
- sizeof(error->device_info));
- }
- static int capture(void *data)
- {
- struct drm_i915_error_state *error = data;
- i915_capture_gen_state(error->i915, error);
- i915_capture_reg_state(error->i915, error);
- i915_gem_record_fences(error->i915, error);
- i915_gem_record_rings(error->i915, error);
- i915_capture_active_buffers(error->i915, error);
- i915_capture_pinned_buffers(error->i915, error);
- i915_gem_capture_guc_log_buffer(error->i915, error);
- do_gettimeofday(&error->time);
- error->boottime = ktime_to_timeval(ktime_get_boottime());
- error->uptime =
- ktime_to_timeval(ktime_sub(ktime_get(),
- error->i915->gt.last_init_time));
- error->overlay = intel_overlay_capture_error_state(error->i915);
- error->display = intel_display_capture_error_state(error->i915);
- return 0;
- }
- #define DAY_AS_SECONDS(x) (24 * 60 * 60 * (x))
- /**
- * i915_capture_error_state - capture an error record for later analysis
- * @dev: drm 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 *dev_priv,
- u32 engine_mask,
- const char *error_msg)
- {
- static bool warned;
- struct drm_i915_error_state *error;
- unsigned long flags;
- if (!i915.error_capture)
- return;
- if (READ_ONCE(dev_priv->gpu_error.first_error))
- return;
- /* Account for pipe specific data like PIPE*STAT */
- error = kzalloc(sizeof(*error), GFP_ATOMIC);
- if (!error) {
- DRM_DEBUG_DRIVER("out of memory, not capturing error state\n");
- return;
- }
- kref_init(&error->ref);
- error->i915 = dev_priv;
- stop_machine(capture, error, NULL);
- i915_error_capture_msg(dev_priv, error, engine_mask, error_msg);
- DRM_INFO("%s\n", error->error_msg);
- if (!error->simulated) {
- spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
- if (!dev_priv->gpu_error.first_error) {
- dev_priv->gpu_error.first_error = error;
- error = NULL;
- }
- spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
- }
- if (error) {
- i915_error_state_free(&error->ref);
- return;
- }
- if (!warned &&
- ktime_get_real_seconds() - DRIVER_TIMESTAMP < DAY_AS_SECONDS(180)) {
- DRM_INFO("GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.\n");
- DRM_INFO("Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel\n");
- DRM_INFO("drm/i915 developers can then reassign to the right component if it's not a kernel issue.\n");
- DRM_INFO("The gpu crash dump is required to analyze gpu hangs, so please always attach it.\n");
- DRM_INFO("GPU crash dump saved to /sys/class/drm/card%d/error\n",
- dev_priv->drm.primary->index);
- warned = true;
- }
- }
- void i915_error_state_get(struct drm_device *dev,
- struct i915_error_state_file_priv *error_priv)
- {
- struct drm_i915_private *dev_priv = to_i915(dev);
- spin_lock_irq(&dev_priv->gpu_error.lock);
- error_priv->error = dev_priv->gpu_error.first_error;
- if (error_priv->error)
- kref_get(&error_priv->error->ref);
- spin_unlock_irq(&dev_priv->gpu_error.lock);
- }
- void i915_error_state_put(struct i915_error_state_file_priv *error_priv)
- {
- if (error_priv->error)
- kref_put(&error_priv->error->ref, i915_error_state_free);
- }
- void i915_destroy_error_state(struct drm_i915_private *dev_priv)
- {
- struct drm_i915_error_state *error;
- spin_lock_irq(&dev_priv->gpu_error.lock);
- error = dev_priv->gpu_error.first_error;
- dev_priv->gpu_error.first_error = NULL;
- spin_unlock_irq(&dev_priv->gpu_error.lock);
- if (error)
- kref_put(&error->ref, i915_error_state_free);
- }