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drm/amdkfd: Page aligned memory reserve size

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[ Upstream commit 0c2dece8fb ]

Use page aligned size to reserve memory usage because page aligned TTM
BO size is used to unreserve memory usage, otherwise no page aligned
size causes memory usage accounting unbalanced.

Change vram_used definition type to int64_t to be able to trigger
WARN_ONCE(adev && adev->kfd.vram_used < 0, "..."), to help debug the
accounting issue with warning and backtrace.

Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Philip Yang
2023-01-09 18:08:17 -05:00
committed by Greg Kroah-Hartman
parent 12003ad0f3
commit 82a6debd4e
3 changed files with 15 additions and 8 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
View File

@@ -95,7 +95,7 @@ struct amdgpu_amdkfd_fence {
struct amdgpu_kfd_dev {
struct kfd_dev *dev;
uint64_t vram_used;
int64_t vram_used;
uint64_t vram_used_aligned;
bool init_complete;
struct work_struct reset_work;

12
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
View File

@@ -1653,6 +1653,7 @@ int amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu(
struct amdgpu_bo *bo;
struct drm_gem_object *gobj = NULL;
u32 domain, alloc_domain;
uint64_t aligned_size;
u64 alloc_flags;
int ret;
@@ -1703,22 +1704,23 @@ int amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu(
* the memory.
*/
if ((*mem)->aql_queue)
size = size >> 1;
size >>= 1;
aligned_size = PAGE_ALIGN(size);
(*mem)->alloc_flags = flags;
amdgpu_sync_create(&(*mem)->sync);
ret = amdgpu_amdkfd_reserve_mem_limit(adev, size, flags);
ret = amdgpu_amdkfd_reserve_mem_limit(adev, aligned_size, flags);
if (ret) {
pr_debug("Insufficient memory\n");
goto err_reserve_limit;
}
pr_debug("\tcreate BO VA 0x%llx size 0x%llx domain %s\n",
va, size, domain_string(alloc_domain));
va, (*mem)->aql_queue ? size << 1 : size, domain_string(alloc_domain));
ret = amdgpu_gem_object_create(adev, size, 1, alloc_domain, alloc_flags,
ret = amdgpu_gem_object_create(adev, aligned_size, 1, alloc_domain, alloc_flags,
bo_type, NULL, &gobj);
if (ret) {
pr_debug("Failed to create BO on domain %s. ret %d\n",
@@ -1775,7 +1777,7 @@ err_node_allow:
/* Don't unreserve system mem limit twice */
goto err_reserve_limit;
err_bo_create:
amdgpu_amdkfd_unreserve_mem_limit(adev, size, flags);
amdgpu_amdkfd_unreserve_mem_limit(adev, aligned_size, flags);
err_reserve_limit:
mutex_destroy(&(*mem)->lock);
if (gobj)

9
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
View File

@@ -1127,8 +1127,13 @@ static int kfd_ioctl_alloc_memory_of_gpu(struct file *filep,
}
/* Update the VRAM usage count */
if (flags & KFD_IOC_ALLOC_MEM_FLAGS_VRAM)
WRITE_ONCE(pdd->vram_usage, pdd->vram_usage + args->size);
if (flags & KFD_IOC_ALLOC_MEM_FLAGS_VRAM) {
uint64_t size = args->size;
if (flags & KFD_IOC_ALLOC_MEM_FLAGS_AQL_QUEUE_MEM)
size >>= 1;
WRITE_ONCE(pdd->vram_usage, pdd->vram_usage + PAGE_ALIGN(size));
}
mutex_unlock(&p->mutex);