Error captures can now be done in a work queue processing G2H messages.
These messages need to be completely done being processed in the reset
path, to avoid races in the missing G2H cleanup, which create a
dependency on memory allocations and dma fences (i915_requests).
Requests depend on resets, thus now we have a circular dependency. To
work around this, allocate the error capture in a nowait context.
v2:
(Daniel Vetter)
- Use GFP_NOWAIT instead GFP_ATOMIC
Fixes: dc0dad365c5e ("Fix for error capture after full GPU reset with GuC")
Fixes: 573ba126aef3 ("Capture error state on context reset")
Signed-off-by: Matthew Brost <matthew.brost@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gpu_error.c | 39 +++++++++++++--------------
1 file changed, 19 insertions(+), 20 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 0f08bcfbe964..2819b69fbb72 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -49,8 +49,7 @@
#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)
+#define ATOMIC_MAYFAIL (GFP_NOWAIT | __GFP_NOWARN)
static void __sg_set_buf(struct scatterlist *sg,
void *addr, unsigned int len, loff_t it)
@@ -79,7 +78,7 @@ static bool __i915_error_grow(struct drm_i915_error_state_buf *e, size_t len)
if (e->cur == e->end) {
struct scatterlist *sgl;
- sgl = (typeof(sgl))__get_free_page(ALLOW_FAIL);
+ sgl = (typeof(sgl))__get_free_page(ATOMIC_MAYFAIL);
if (!sgl) {
e->err = -ENOMEM;
return false;
@@ -99,10 +98,10 @@ static bool __i915_error_grow(struct drm_i915_error_state_buf *e, size_t len)
}
e->size = ALIGN(len + 1, SZ_64K);
- e->buf = kmalloc(e->size, ALLOW_FAIL);
+ e->buf = kmalloc(e->size, ATOMIC_MAYFAIL);
if (!e->buf) {
e->size = PAGE_ALIGN(len + 1);
- e->buf = kmalloc(e->size, GFP_KERNEL);
+ e->buf = kmalloc(e->size, ATOMIC_MAYFAIL);
}
if (!e->buf) {
e->err = -ENOMEM;
@@ -243,12 +242,12 @@ static bool compress_init(struct i915_vma_compress *c)
{
struct z_stream_s *zstream = &c->zstream;
- if (pool_init(&c->pool, ALLOW_FAIL))
+ if (pool_init(&c->pool, ATOMIC_MAYFAIL))
return false;
zstream->workspace =
kmalloc(zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL),
- ALLOW_FAIL);
+ ATOMIC_MAYFAIL);
if (!zstream->workspace) {
pool_fini(&c->pool);
return false;
@@ -256,7 +255,7 @@ static bool compress_init(struct i915_vma_compress *c)
c->tmp = NULL;
if (i915_has_memcpy_from_wc())
- c->tmp = pool_alloc(&c->pool, ALLOW_FAIL);
+ c->tmp = pool_alloc(&c->pool, ATOMIC_MAYFAIL);
return true;
}
@@ -280,7 +279,7 @@ static void *compress_next_page(struct i915_vma_compress *c,
if (dst->page_count >= dst->num_pages)
return ERR_PTR(-ENOSPC);
- page = pool_alloc(&c->pool, ALLOW_FAIL);
+ page = pool_alloc(&c->pool, ATOMIC_MAYFAIL);
if (!page)
return ERR_PTR(-ENOMEM);
@@ -376,7 +375,7 @@ struct i915_vma_compress {
static bool compress_init(struct i915_vma_compress *c)
{
- return pool_init(&c->pool, ALLOW_FAIL) == 0;
+ return pool_init(&c->pool, ATOMIC_MAYFAIL) == 0;
}
static bool compress_start(struct i915_vma_compress *c)
@@ -391,7 +390,7 @@ static int compress_page(struct i915_vma_compress *c,
{
void *ptr;
- ptr = pool_alloc(&c->pool, ALLOW_FAIL);
+ ptr = pool_alloc(&c->pool, ATOMIC_MAYFAIL);
if (!ptr)
return -ENOMEM;
@@ -997,7 +996,7 @@ i915_vma_coredump_create(const struct intel_gt *gt,
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);
+ dst = kmalloc(sizeof(*dst) + num_pages * sizeof(u32 *), ATOMIC_MAYFAIL);
if (!dst)
return NULL;
@@ -1433,7 +1432,7 @@ capture_engine(struct intel_engine_cs *engine,
struct i915_request *rq = NULL;
unsigned long flags;
- ee = intel_engine_coredump_alloc(engine, GFP_KERNEL);
+ ee = intel_engine_coredump_alloc(engine, ATOMIC_MAYFAIL);
if (!ee)
return NULL;
@@ -1481,7 +1480,7 @@ gt_record_engines(struct intel_gt_coredump *gt,
struct intel_engine_coredump *ee;
/* Refill our page pool before entering atomic section */
- pool_refill(&compress->pool, ALLOW_FAIL);
+ pool_refill(&compress->pool, ATOMIC_MAYFAIL);
ee = capture_engine(engine, compress);
if (!ee)
@@ -1507,7 +1506,7 @@ gt_record_uc(struct intel_gt_coredump *gt,
const struct intel_uc *uc = >->_gt->uc;
struct intel_uc_coredump *error_uc;
- error_uc = kzalloc(sizeof(*error_uc), ALLOW_FAIL);
+ error_uc = kzalloc(sizeof(*error_uc), ATOMIC_MAYFAIL);
if (!error_uc)
return NULL;
@@ -1518,8 +1517,8 @@ gt_record_uc(struct intel_gt_coredump *gt,
* 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_fw.path = kstrdup(uc->guc.fw.path, ATOMIC_MAYFAIL);
+ error_uc->huc_fw.path = kstrdup(uc->huc.fw.path, ATOMIC_MAYFAIL);
error_uc->guc_log =
i915_vma_coredump_create(gt->_gt,
uc->guc.log.vma, "GuC log buffer",
@@ -1778,7 +1777,7 @@ i915_vma_capture_prepare(struct intel_gt_coredump *gt)
{
struct i915_vma_compress *compress;
- compress = kmalloc(sizeof(*compress), ALLOW_FAIL);
+ compress = kmalloc(sizeof(*compress), ATOMIC_MAYFAIL);
if (!compress)
return NULL;
@@ -1811,11 +1810,11 @@ i915_gpu_coredump(struct intel_gt *gt, intel_engine_mask_t engine_mask)
if (IS_ERR(error))
return error;
- error = i915_gpu_coredump_alloc(i915, ALLOW_FAIL);
+ error = i915_gpu_coredump_alloc(i915, ATOMIC_MAYFAIL);
if (!error)
return ERR_PTR(-ENOMEM);
- error->gt = intel_gt_coredump_alloc(gt, ALLOW_FAIL);
+ error->gt = intel_gt_coredump_alloc(gt, ATOMIC_MAYFAIL);
if (error->gt) {
struct i915_vma_compress *compress;
--
2.32.0
