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OpenCloudOS-Kernel/drivers/gpu/drm/i915/i915_gpu_error.c

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/*
* 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 "i915_drv.h"
static const char *ring_str(int ring)
{
switch (ring) {
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 *pin_flag(int pinned)
{
if (pinned > 0)
return " P";
else if (pinned < 0)
return " p";
else
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;
}
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)
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_RINGS; i++)
err_printf(m, "%02x ", err->rseqno[i]);
err_printf(m, "] %02x", err->wseqno);
err_puts(m, pin_flag(err->pinned));
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->ring != -1 ? " " : "");
err_puts(m, ring_str(err->ring));
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 const char *hangcheck_action_to_str(enum intel_ring_hangcheck_action a)
{
switch (a) {
case HANGCHECK_IDLE:
return "idle";
case HANGCHECK_WAIT:
return "wait";
case HANGCHECK_ACTIVE:
return "active";
case HANGCHECK_ACTIVE_LOOP:
return "active (loop)";
case HANGCHECK_KICK:
return "kick";
case HANGCHECK_HUNG:
return "hung";
}
return "unknown";
}
static void i915_ring_error_state(struct drm_i915_error_state_buf *m,
struct drm_device *dev,
struct drm_i915_error_state *error,
int ring_idx)
{
struct drm_i915_error_ring *ring = &error->ring[ring_idx];
if (!ring->valid)
return;
err_printf(m, "%s command stream:\n", ring_str(ring_idx));
err_printf(m, " START: 0x%08x\n", ring->start);
err_printf(m, " HEAD: 0x%08x\n", ring->head);
err_printf(m, " TAIL: 0x%08x\n", ring->tail);
err_printf(m, " CTL: 0x%08x\n", ring->ctl);
err_printf(m, " HWS: 0x%08x\n", ring->hws);
err_printf(m, " ACTHD: 0x%08x %08x\n", (u32)(ring->acthd>>32), (u32)ring->acthd);
err_printf(m, " IPEIR: 0x%08x\n", ring->ipeir);
err_printf(m, " IPEHR: 0x%08x\n", ring->ipehr);
err_printf(m, " INSTDONE: 0x%08x\n", ring->instdone);
if (INTEL_INFO(dev)->gen >= 4) {
err_printf(m, " BBADDR: 0x%08x %08x\n", (u32)(ring->bbaddr>>32), (u32)ring->bbaddr);
err_printf(m, " BB_STATE: 0x%08x\n", ring->bbstate);
err_printf(m, " INSTPS: 0x%08x\n", ring->instps);
}
err_printf(m, " INSTPM: 0x%08x\n", ring->instpm);
err_printf(m, " FADDR: 0x%08x %08x\n", upper_32_bits(ring->faddr),
lower_32_bits(ring->faddr));
if (INTEL_INFO(dev)->gen >= 6) {
err_printf(m, " RC PSMI: 0x%08x\n", ring->rc_psmi);
err_printf(m, " FAULT_REG: 0x%08x\n", ring->fault_reg);
err_printf(m, " SYNC_0: 0x%08x [last synced 0x%08x]\n",
ring->semaphore_mboxes[0],
ring->semaphore_seqno[0]);
err_printf(m, " SYNC_1: 0x%08x [last synced 0x%08x]\n",
ring->semaphore_mboxes[1],
ring->semaphore_seqno[1]);
if (HAS_VEBOX(dev)) {
err_printf(m, " SYNC_2: 0x%08x [last synced 0x%08x]\n",
ring->semaphore_mboxes[2],
ring->semaphore_seqno[2]);
}
}
if (USES_PPGTT(dev)) {
err_printf(m, " GFX_MODE: 0x%08x\n", ring->vm_info.gfx_mode);
if (INTEL_INFO(dev)->gen >= 8) {
int i;
for (i = 0; i < 4; i++)
err_printf(m, " PDP%d: 0x%016llx\n",
i, ring->vm_info.pdp[i]);
} else {
err_printf(m, " PP_DIR_BASE: 0x%08x\n",
ring->vm_info.pp_dir_base);
}
}
err_printf(m, " seqno: 0x%08x\n", ring->seqno);
err_printf(m, " waiting: %s\n", yesno(ring->waiting));
err_printf(m, " ring->head: 0x%08x\n", ring->cpu_ring_head);
err_printf(m, " ring->tail: 0x%08x\n", ring->cpu_ring_tail);
err_printf(m, " hangcheck: %s [%d]\n",
hangcheck_action_to_str(ring->hangcheck_action),
ring->hangcheck_score);
}
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_obj(struct drm_i915_error_state_buf *m,
struct drm_i915_error_object *obj)
{
int page, offset, elt;
for (page = offset = 0; page < obj->page_count; page++) {
for (elt = 0; elt < PAGE_SIZE/4; elt++) {
err_printf(m, "%08x : %08x\n", offset,
obj->pages[page][elt]);
offset += 4;
}
}
}
int i915_error_state_to_str(struct drm_i915_error_state_buf *m,
const struct i915_error_state_file_priv *error_priv)
{
struct drm_device *dev = error_priv->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_error_state *error = error_priv->error;
struct drm_i915_error_object *obj;
int i, j, offset, elt;
int max_hangcheck_score;
if (!error) {
err_printf(m, "no error state collected\n");
goto out;
}
err_printf(m, "%s\n", error->error_msg);
err_printf(m, "Time: %ld s %ld us\n", error->time.tv_sec,
error->time.tv_usec);
err_printf(m, "Kernel: " UTS_RELEASE "\n");
max_hangcheck_score = 0;
for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
if (error->ring[i].hangcheck_score > max_hangcheck_score)
max_hangcheck_score = error->ring[i].hangcheck_score;
}
for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
if (error->ring[i].hangcheck_score == max_hangcheck_score &&
error->ring[i].pid != -1) {
err_printf(m, "Active process (on ring %s): %s [%d]\n",
ring_str(i),
error->ring[i].comm,
error->ring[i].pid);
}
}
err_printf(m, "Reset count: %u\n", error->reset_count);
err_printf(m, "Suspend count: %u\n", error->suspend_count);
err_printf(m, "PCI ID: 0x%04x\n", dev->pdev->device);
err_printf(m, "IOMMU enabled?: %d\n", error->iommu);
if (HAS_CSR(dev)) {
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_INFO(dev)->gen >= 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) || IS_VALLEYVIEW(dev))
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]);
for (i = 0; i < ARRAY_SIZE(error->extra_instdone); i++)
err_printf(m, " INSTDONE_%d: 0x%08x\n", i,
error->extra_instdone[i]);
if (INTEL_INFO(dev)->gen >= 6) {
err_printf(m, "ERROR: 0x%08x\n", error->error);
if (INTEL_INFO(dev)->gen >= 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 (INTEL_INFO(dev)->gen == 7)
err_printf(m, "ERR_INT: 0x%08x\n", error->err_int);
for (i = 0; i < ARRAY_SIZE(error->ring); i++)
i915_ring_error_state(m, dev, error, i);
for (i = 0; i < error->vm_count; i++) {
err_printf(m, "vm[%d]\n", i);
print_error_buffers(m, "Active",
error->active_bo[i],
error->active_bo_count[i]);
print_error_buffers(m, "Pinned",
error->pinned_bo[i],
error->pinned_bo_count[i]);
}
for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
obj = error->ring[i].batchbuffer;
if (obj) {
err_puts(m, dev_priv->ring[i].name);
if (error->ring[i].pid != -1)
err_printf(m, " (submitted by %s [%d])",
error->ring[i].comm,
error->ring[i].pid);
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, obj);
}
obj = error->ring[i].wa_batchbuffer;
if (obj) {
err_printf(m, "%s (w/a) --- gtt_offset = 0x%08x\n",
dev_priv->ring[i].name,
lower_32_bits(obj->gtt_offset));
print_error_obj(m, obj);
}
if (error->ring[i].num_requests) {
err_printf(m, "%s --- %d requests\n",
dev_priv->ring[i].name,
error->ring[i].num_requests);
for (j = 0; j < error->ring[i].num_requests; j++) {
err_printf(m, " seqno 0x%08x, emitted %ld, tail 0x%08x\n",
error->ring[i].requests[j].seqno,
error->ring[i].requests[j].jiffies,
error->ring[i].requests[j].tail);
}
}
if ((obj = error->ring[i].ringbuffer)) {
err_printf(m, "%s --- ringbuffer = 0x%08x\n",
dev_priv->ring[i].name,
lower_32_bits(obj->gtt_offset));
print_error_obj(m, obj);
}
if ((obj = error->ring[i].hws_page)) {
u64 hws_offset = obj->gtt_offset;
u32 *hws_page = &obj->pages[0][0];
if (i915.enable_execlists) {
hws_offset += LRC_PPHWSP_PN * PAGE_SIZE;
hws_page = &obj->pages[LRC_PPHWSP_PN][0];
}
err_printf(m, "%s --- HW Status = 0x%08llx\n",
dev_priv->ring[i].name, hws_offset);
offset = 0;
for (elt = 0; elt < PAGE_SIZE/16; elt += 4) {
err_printf(m, "[%04x] %08x %08x %08x %08x\n",
offset,
hws_page[elt],
hws_page[elt+1],
hws_page[elt+2],
hws_page[elt+3]);
offset += 16;
}
}
if ((obj = error->ring[i].ctx)) {
err_printf(m, "%s --- HW Context = 0x%08x\n",
dev_priv->ring[i].name,
lower_32_bits(obj->gtt_offset));
print_error_obj(m, obj);
}
}
if ((obj = error->semaphore_obj)) {
err_printf(m, "Semaphore page = 0x%08x\n",
lower_32_bits(obj->gtt_offset));
for (elt = 0; elt < PAGE_SIZE/16; elt += 4) {
err_printf(m, "[%04x] %08x %08x %08x %08x\n",
elt * 4,
obj->pages[0][elt],
obj->pages[0][elt+1],
obj->pages[0][elt+2],
obj->pages[0][elt+3]);
}
}
if (error->overlay)
intel_overlay_print_error_state(m, error->overlay);
if (error->display)
intel_display_print_error_state(m, dev, 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++)
kfree(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->ring); i++) {
i915_error_object_free(error->ring[i].batchbuffer);
i915_error_object_free(error->ring[i].wa_batchbuffer);
i915_error_object_free(error->ring[i].ringbuffer);
i915_error_object_free(error->ring[i].hws_page);
i915_error_object_free(error->ring[i].ctx);
kfree(error->ring[i].requests);
}
i915_error_object_free(error->semaphore_obj);
for (i = 0; i < error->vm_count; i++)
kfree(error->active_bo[i]);
kfree(error->active_bo);
kfree(error->active_bo_count);
kfree(error->pinned_bo);
kfree(error->pinned_bo_count);
kfree(error->overlay);
kfree(error->display);
kfree(error);
}
static struct drm_i915_error_object *
i915_error_object_create(struct drm_i915_private *dev_priv,
struct drm_i915_gem_object *src,
struct i915_address_space *vm)
{
struct drm_i915_error_object *dst;
struct i915_vma *vma = NULL;
int num_pages;
bool use_ggtt;
int i = 0;
u64 reloc_offset;
if (src == NULL || src->pages == NULL)
return NULL;
num_pages = src->base.size >> PAGE_SHIFT;
dst = kmalloc(sizeof(*dst) + num_pages * sizeof(u32 *), GFP_ATOMIC);
if (dst == NULL)
return NULL;
if (i915_gem_obj_bound(src, vm))
dst->gtt_offset = i915_gem_obj_offset(src, vm);
else
dst->gtt_offset = -1;
reloc_offset = dst->gtt_offset;
if (i915_is_ggtt(vm))
vma = i915_gem_obj_to_ggtt(src);
use_ggtt = (src->cache_level == I915_CACHE_NONE &&
vma && (vma->bound & GLOBAL_BIND) &&
reloc_offset + num_pages * PAGE_SIZE <= dev_priv->gtt.mappable_end);
/* Cannot access stolen address directly, try to use the aperture */
if (src->stolen) {
use_ggtt = true;
if (!(vma && vma->bound & GLOBAL_BIND))
goto unwind;
reloc_offset = i915_gem_obj_ggtt_offset(src);
if (reloc_offset + num_pages * PAGE_SIZE > dev_priv->gtt.mappable_end)
goto unwind;
}
/* Cannot access snooped pages through the aperture */
if (use_ggtt && src->cache_level != I915_CACHE_NONE && !HAS_LLC(dev_priv->dev))
goto unwind;
dst->page_count = num_pages;
while (num_pages--) {
unsigned long flags;
void *d;
d = kmalloc(PAGE_SIZE, GFP_ATOMIC);
if (d == NULL)
goto unwind;
local_irq_save(flags);
if (use_ggtt) {
void __iomem *s;
/* Simply ignore tiling or any overlapping fence.
* It's part of the error state, and this hopefully
* captures what the GPU read.
*/
s = io_mapping_map_atomic_wc(dev_priv->gtt.mappable,
reloc_offset);
memcpy_fromio(d, s, PAGE_SIZE);
io_mapping_unmap_atomic(s);
} else {
struct page *page;
void *s;
page = i915_gem_object_get_page(src, i);
drm_clflush_pages(&page, 1);
s = kmap_atomic(page);
memcpy(d, s, PAGE_SIZE);
kunmap_atomic(s);
drm_clflush_pages(&page, 1);
}
local_irq_restore(flags);
dst->pages[i++] = d;
reloc_offset += PAGE_SIZE;
}
return dst;
unwind:
while (i--)
kfree(dst->pages[i]);
kfree(dst);
return NULL;
}
#define i915_error_ggtt_object_create(dev_priv, src) \
i915_error_object_create((dev_priv), (src), &(dev_priv)->gtt.base)
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_RINGS; i++)
err->rseqno[i] = i915_gem_request_get_seqno(obj->last_read_req[i]);
err->wseqno = i915_gem_request_get_seqno(obj->last_write_req);
err->gtt_offset = vma->node.start;
err->read_domains = obj->base.read_domains;
err->write_domain = obj->base.write_domain;
err->fence_reg = obj->fence_reg;
err->pinned = 0;
if (i915_gem_obj_is_pinned(obj))
err->pinned = 1;
err->tiling = obj->tiling_mode;
err->dirty = obj->dirty;
err->purgeable = obj->madv != I915_MADV_WILLNEED;
err->userptr = obj->userptr.mm != NULL;
err->ring = obj->last_write_req ?
i915_gem_request_get_ring(obj->last_write_req)->id : -1;
err->cache_level = obj->cache_level;
}
static u32 capture_active_bo(struct drm_i915_error_buffer *err,
int count, struct list_head *head)
{
struct i915_vma *vma;
int i = 0;
list_for_each_entry(vma, head, mm_list) {
capture_bo(err++, vma);
if (++i == count)
break;
}
return i;
}
static u32 capture_pinned_bo(struct drm_i915_error_buffer *err,
int count, struct list_head *head,
struct i915_address_space *vm)
{
struct drm_i915_gem_object *obj;
struct drm_i915_error_buffer * const first = err;
struct drm_i915_error_buffer * const last = err + count;
list_for_each_entry(obj, head, global_list) {
struct i915_vma *vma;
if (err == last)
break;
list_for_each_entry(vma, &obj->vma_list, vma_link)
if (vma->vm == vm && vma->pin_count > 0)
capture_bo(err++, vma);
}
return err - first;
}
/* 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 *ring_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_RINGS; i++) {
if (error->ring[i].hangcheck_action == HANGCHECK_HUNG) {
if (ring_id)
*ring_id = i;
return error->ring[i].ipehr ^ error->ring[i].instdone;
}
}
return error_code;
}
static void i915_gem_record_fences(struct drm_device *dev,
struct drm_i915_error_state *error)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int i;
if (IS_GEN3(dev) || IS_GEN2(dev)) {
for (i = 0; i < dev_priv->num_fence_regs; i++)
error->fence[i] = I915_READ(FENCE_REG(i));
} else if (IS_GEN5(dev) || IS_GEN4(dev)) {
for (i = 0; i < dev_priv->num_fence_regs; i++)
error->fence[i] = I915_READ64(FENCE_REG_965_LO(i));
} else if (INTEL_INFO(dev)->gen >= 6) {
for (i = 0; i < dev_priv->num_fence_regs; i++)
error->fence[i] = I915_READ64(FENCE_REG_GEN6_LO(i));
}
}
static void gen8_record_semaphore_state(struct drm_i915_private *dev_priv,
struct drm_i915_error_state *error,
struct intel_engine_cs *ring,
struct drm_i915_error_ring *ering)
{
struct intel_engine_cs *to;
int i;
if (!i915_semaphore_is_enabled(dev_priv->dev))
return;
if (!error->semaphore_obj)
error->semaphore_obj =
i915_error_ggtt_object_create(dev_priv,
dev_priv->semaphore_obj);
for_each_ring(to, dev_priv, i) {
int idx;
u16 signal_offset;
u32 *tmp;
if (ring == to)
continue;
signal_offset = (GEN8_SIGNAL_OFFSET(ring, i) & (PAGE_SIZE - 1))
/ 4;
tmp = error->semaphore_obj->pages[0];
idx = intel_ring_sync_index(ring, to);
ering->semaphore_mboxes[idx] = tmp[signal_offset];
ering->semaphore_seqno[idx] = ring->semaphore.sync_seqno[idx];
}
}
static void gen6_record_semaphore_state(struct drm_i915_private *dev_priv,
struct intel_engine_cs *ring,
struct drm_i915_error_ring *ering)
{
ering->semaphore_mboxes[0] = I915_READ(RING_SYNC_0(ring->mmio_base));
ering->semaphore_mboxes[1] = I915_READ(RING_SYNC_1(ring->mmio_base));
ering->semaphore_seqno[0] = ring->semaphore.sync_seqno[0];
ering->semaphore_seqno[1] = ring->semaphore.sync_seqno[1];
if (HAS_VEBOX(dev_priv->dev)) {
ering->semaphore_mboxes[2] =
I915_READ(RING_SYNC_2(ring->mmio_base));
ering->semaphore_seqno[2] = ring->semaphore.sync_seqno[2];
}
}
static void i915_record_ring_state(struct drm_device *dev,
struct drm_i915_error_state *error,
struct intel_engine_cs *ring,
struct drm_i915_error_ring *ering)
{
struct drm_i915_private *dev_priv = dev->dev_private;
if (INTEL_INFO(dev)->gen >= 6) {
ering->rc_psmi = I915_READ(RING_PSMI_CTL(ring->mmio_base));
ering->fault_reg = I915_READ(RING_FAULT_REG(ring));
if (INTEL_INFO(dev)->gen >= 8)
gen8_record_semaphore_state(dev_priv, error, ring, ering);
else
gen6_record_semaphore_state(dev_priv, ring, ering);
}
if (INTEL_INFO(dev)->gen >= 4) {
ering->faddr = I915_READ(RING_DMA_FADD(ring->mmio_base));
ering->ipeir = I915_READ(RING_IPEIR(ring->mmio_base));
ering->ipehr = I915_READ(RING_IPEHR(ring->mmio_base));
ering->instdone = I915_READ(RING_INSTDONE(ring->mmio_base));
ering->instps = I915_READ(RING_INSTPS(ring->mmio_base));
ering->bbaddr = I915_READ(RING_BBADDR(ring->mmio_base));
if (INTEL_INFO(dev)->gen >= 8) {
ering->faddr |= (u64) I915_READ(RING_DMA_FADD_UDW(ring->mmio_base)) << 32;
ering->bbaddr |= (u64) I915_READ(RING_BBADDR_UDW(ring->mmio_base)) << 32;
}
ering->bbstate = I915_READ(RING_BBSTATE(ring->mmio_base));
} else {
ering->faddr = I915_READ(DMA_FADD_I8XX);
ering->ipeir = I915_READ(IPEIR);
ering->ipehr = I915_READ(IPEHR);
ering->instdone = I915_READ(GEN2_INSTDONE);
}
ering->waiting = waitqueue_active(&ring->irq_queue);
ering->instpm = I915_READ(RING_INSTPM(ring->mmio_base));
ering->seqno = ring->get_seqno(ring, false);
ering->acthd = intel_ring_get_active_head(ring);
ering->start = I915_READ_START(ring);
ering->head = I915_READ_HEAD(ring);
ering->tail = I915_READ_TAIL(ring);
ering->ctl = I915_READ_CTL(ring);
if (I915_NEED_GFX_HWS(dev)) {
i915_reg_t mmio;
if (IS_GEN7(dev)) {
switch (ring->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(ring->dev)) {
mmio = RING_HWS_PGA_GEN6(ring->mmio_base);
} else {
/* XXX: gen8 returns to sanity */
mmio = RING_HWS_PGA(ring->mmio_base);
}
ering->hws = I915_READ(mmio);
}
ering->hangcheck_score = ring->hangcheck.score;
ering->hangcheck_action = ring->hangcheck.action;
if (USES_PPGTT(dev)) {
int i;
ering->vm_info.gfx_mode = I915_READ(RING_MODE_GEN7(ring));
if (IS_GEN6(dev))
ering->vm_info.pp_dir_base =
I915_READ(RING_PP_DIR_BASE_READ(ring));
else if (IS_GEN7(dev))
ering->vm_info.pp_dir_base =
I915_READ(RING_PP_DIR_BASE(ring));
else if (INTEL_INFO(dev)->gen >= 8)
for (i = 0; i < 4; i++) {
ering->vm_info.pdp[i] =
I915_READ(GEN8_RING_PDP_UDW(ring, i));
ering->vm_info.pdp[i] <<= 32;
ering->vm_info.pdp[i] |=
I915_READ(GEN8_RING_PDP_LDW(ring, i));
}
}
}
static void i915_gem_record_active_context(struct intel_engine_cs *ring,
struct drm_i915_error_state *error,
struct drm_i915_error_ring *ering)
{
struct drm_i915_private *dev_priv = ring->dev->dev_private;
struct drm_i915_gem_object *obj;
/* Currently render ring is the only HW context user */
if (ring->id != RCS || !error->ccid)
return;
list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
if (!i915_gem_obj_ggtt_bound(obj))
continue;
if ((error->ccid & PAGE_MASK) == i915_gem_obj_ggtt_offset(obj)) {
ering->ctx = i915_error_ggtt_object_create(dev_priv, obj);
break;
}
}
}
static void i915_gem_record_rings(struct drm_device *dev,
struct drm_i915_error_state *error)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_gem_request *request;
int i, count;
for (i = 0; i < I915_NUM_RINGS; i++) {
struct intel_engine_cs *ring = &dev_priv->ring[i];
struct intel_ringbuffer *rbuf;
error->ring[i].pid = -1;
if (ring->dev == NULL)
continue;
error->ring[i].valid = true;
i915_record_ring_state(dev, error, ring, &error->ring[i]);
request = i915_gem_find_active_request(ring);
if (request) {
struct i915_address_space *vm;
vm = request->ctx && request->ctx->ppgtt ?
&request->ctx->ppgtt->base :
&dev_priv->gtt.base;
/* We need to copy these to an anonymous buffer
* as the simplest method to avoid being overwritten
* by userspace.
*/
error->ring[i].batchbuffer =
i915_error_object_create(dev_priv,
request->batch_obj,
vm);
if (HAS_BROKEN_CS_TLB(dev_priv->dev))
error->ring[i].wa_batchbuffer =
i915_error_ggtt_object_create(dev_priv,
ring->scratch.obj);
if (request->pid) {
struct task_struct *task;
rcu_read_lock();
task = pid_task(request->pid, PIDTYPE_PID);
if (task) {
strcpy(error->ring[i].comm, task->comm);
error->ring[i].pid = task->pid;
}
rcu_read_unlock();
}
}
if (i915.enable_execlists) {
/* TODO: This is only a small fix to keep basic error
* capture working, but we need to add more information
* for it to be useful (e.g. dump the context being
* executed).
*/
if (request)
rbuf = request->ctx->engine[ring->id].ringbuf;
else
rbuf = ring->default_context->engine[ring->id].ringbuf;
} else
rbuf = ring->buffer;
error->ring[i].cpu_ring_head = rbuf->head;
error->ring[i].cpu_ring_tail = rbuf->tail;
error->ring[i].ringbuffer =
i915_error_ggtt_object_create(dev_priv, rbuf->obj);
error->ring[i].hws_page =
i915_error_ggtt_object_create(dev_priv, ring->status_page.obj);
i915_gem_record_active_context(ring, error, &error->ring[i]);
count = 0;
list_for_each_entry(request, &ring->request_list, list)
count++;
error->ring[i].num_requests = count;
error->ring[i].requests =
kcalloc(count, sizeof(*error->ring[i].requests),
GFP_ATOMIC);
if (error->ring[i].requests == NULL) {
error->ring[i].num_requests = 0;
continue;
}
count = 0;
list_for_each_entry(request, &ring->request_list, list) {
struct drm_i915_error_request *erq;
if (count >= error->ring[i].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;
}
erq = &error->ring[i].requests[count++];
erq->seqno = request->seqno;
erq->jiffies = request->emitted_jiffies;
erq->tail = request->postfix;
}
}
}
/* FIXME: Since pin count/bound list is global, we duplicate what we capture per
* VM.
*/
static void i915_gem_capture_vm(struct drm_i915_private *dev_priv,
struct drm_i915_error_state *error,
struct i915_address_space *vm,
const int ndx)
{
struct drm_i915_error_buffer *active_bo = NULL, *pinned_bo = NULL;
struct drm_i915_gem_object *obj;
struct i915_vma *vma;
int i;
i = 0;
list_for_each_entry(vma, &vm->active_list, mm_list)
i++;
error->active_bo_count[ndx] = i;
list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
list_for_each_entry(vma, &obj->vma_list, vma_link)
if (vma->vm == vm && vma->pin_count > 0)
i++;
}
error->pinned_bo_count[ndx] = i - error->active_bo_count[ndx];
if (i) {
active_bo = kcalloc(i, sizeof(*active_bo), GFP_ATOMIC);
if (active_bo)
pinned_bo = active_bo + error->active_bo_count[ndx];
}
if (active_bo)
error->active_bo_count[ndx] =
capture_active_bo(active_bo,
error->active_bo_count[ndx],
&vm->active_list);
if (pinned_bo)
error->pinned_bo_count[ndx] =
capture_pinned_bo(pinned_bo,
error->pinned_bo_count[ndx],
&dev_priv->mm.bound_list, vm);
error->active_bo[ndx] = active_bo;
error->pinned_bo[ndx] = pinned_bo;
}
static void i915_gem_capture_buffers(struct drm_i915_private *dev_priv,
struct drm_i915_error_state *error)
{
struct i915_address_space *vm;
int cnt = 0, i = 0;
list_for_each_entry(vm, &dev_priv->vm_list, global_link)
cnt++;
error->active_bo = kcalloc(cnt, sizeof(*error->active_bo), GFP_ATOMIC);
error->pinned_bo = kcalloc(cnt, sizeof(*error->pinned_bo), GFP_ATOMIC);
error->active_bo_count = kcalloc(cnt, sizeof(*error->active_bo_count),
GFP_ATOMIC);
error->pinned_bo_count = kcalloc(cnt, sizeof(*error->pinned_bo_count),
GFP_ATOMIC);
if (error->active_bo == NULL ||
error->pinned_bo == NULL ||
error->active_bo_count == NULL ||
error->pinned_bo_count == NULL) {
kfree(error->active_bo);
kfree(error->active_bo_count);
kfree(error->pinned_bo);
kfree(error->pinned_bo_count);
error->active_bo = NULL;
error->active_bo_count = NULL;
error->pinned_bo = NULL;
error->pinned_bo_count = NULL;
} else {
list_for_each_entry(vm, &dev_priv->vm_list, global_link)
i915_gem_capture_vm(dev_priv, error, vm, i++);
error->vm_count = cnt;
}
}
/* 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)
{
struct drm_device *dev = dev_priv->dev;
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)) {
error->gtier[0] = I915_READ(GTIER);
error->ier = I915_READ(VLV_IER);
error->forcewake = I915_READ_FW(FORCEWAKE_VLV);
}
if (IS_GEN7(dev))
error->err_int = I915_READ(GEN7_ERR_INT);
if (INTEL_INFO(dev)->gen >= 8) {
error->fault_data0 = I915_READ(GEN8_FAULT_TLB_DATA0);
error->fault_data1 = I915_READ(GEN8_FAULT_TLB_DATA1);
}
if (IS_GEN6(dev)) {
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_INFO(dev)->gen >= 7)
error->forcewake = I915_READ_FW(FORCEWAKE_MT);
if (INTEL_INFO(dev)->gen >= 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) || IS_GEN7(dev)) {
error->gam_ecochk = I915_READ(GAM_ECOCHK);
error->gac_eco = I915_READ(GAC_ECO_BITS);
}
/* 4: Everything else */
if (HAS_HW_CONTEXTS(dev))
error->ccid = I915_READ(CCID);
if (INTEL_INFO(dev)->gen >= 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)) {
error->ier = I915_READ(DEIER);
error->gtier[0] = I915_READ(GTIER);
} else if (IS_GEN2(dev)) {
error->ier = I915_READ16(IER);
} else if (!IS_VALLEYVIEW(dev)) {
error->ier = I915_READ(IER);
}
error->eir = I915_READ(EIR);
error->pgtbl_er = I915_READ(PGTBL_ER);
i915_get_extra_instdone(dev, error->extra_instdone);
}
static void i915_error_capture_msg(struct drm_device *dev,
struct drm_i915_error_state *error,
bool wedged,
const char *error_msg)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 ecode;
int ring_id = -1, len;
ecode = i915_error_generate_code(dev_priv, error, &ring_id);
len = scnprintf(error->error_msg, sizeof(error->error_msg),
"GPU HANG: ecode %d:%d:0x%08x",
INTEL_INFO(dev)->gen, ring_id, ecode);
if (ring_id != -1 && error->ring[ring_id].pid != -1)
len += scnprintf(error->error_msg + len,
sizeof(error->error_msg) - len,
", in %s [%d]",
error->ring[ring_id].comm,
error->ring[ring_id].pid);
scnprintf(error->error_msg + len, sizeof(error->error_msg) - len,
", reason: %s, action: %s",
error_msg,
wedged ? "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;
}
/**
* 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_device *dev, bool wedged,
const char *error_msg)
{
static bool warned;
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_error_state *error;
unsigned long flags;
/* 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);
i915_capture_gen_state(dev_priv, error);
i915_capture_reg_state(dev_priv, error);
i915_gem_capture_buffers(dev_priv, error);
i915_gem_record_fences(dev, error);
i915_gem_record_rings(dev, error);
do_gettimeofday(&error->time);
error->overlay = intel_overlay_capture_error_state(dev);
error->display = intel_display_capture_error_state(dev);
i915_error_capture_msg(dev, error, wedged, error_msg);
DRM_INFO("%s\n", error->error_msg);
spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
if (dev_priv->gpu_error.first_error == NULL) {
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) {
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->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 = dev->dev_private;
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_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
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);
}
const char *i915_cache_level_str(struct drm_i915_private *i915, int type)
{
switch (type) {
case I915_CACHE_NONE: return " uncached";
case I915_CACHE_LLC: return HAS_LLC(i915) ? " LLC" : " snooped";
case I915_CACHE_L3_LLC: return " L3+LLC";
case I915_CACHE_WT: return " WT";
default: return "";
}
}
/* NB: please notice the memset */
void i915_get_extra_instdone(struct drm_device *dev, uint32_t *instdone)
{
struct drm_i915_private *dev_priv = dev->dev_private;
memset(instdone, 0, sizeof(*instdone) * I915_NUM_INSTDONE_REG);
if (IS_GEN2(dev) || IS_GEN3(dev))
instdone[0] = I915_READ(GEN2_INSTDONE);
else if (IS_GEN4(dev) || IS_GEN5(dev) || IS_GEN6(dev)) {
instdone[0] = I915_READ(RING_INSTDONE(RENDER_RING_BASE));
instdone[1] = I915_READ(GEN4_INSTDONE1);
} else if (INTEL_INFO(dev)->gen >= 7) {
instdone[0] = I915_READ(RING_INSTDONE(RENDER_RING_BASE));
instdone[1] = I915_READ(GEN7_SC_INSTDONE);
instdone[2] = I915_READ(GEN7_SAMPLER_INSTDONE);
instdone[3] = I915_READ(GEN7_ROW_INSTDONE);
}
}
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