[PATCH] drm/amdgpu: Add a low priority scheduler for VRAM clearing
Mukul Joshi
mukul.joshi at amd.com
Wed May 17 21:40:40 UTC 2023
Add a low priority DRM scheduler for VRAM clearing instead of using
the exisiting high priority scheduler. Use the high priority scheduler
for migrations and evictions.
Signed-off-by: Mukul Joshi <mukul.joshi at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 4 +--
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 37 ++++++++++++++++------
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 5 ++-
3 files changed, 34 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 9924c8de57ab..46f249912b67 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -627,7 +627,7 @@ int amdgpu_bo_create(struct amdgpu_device *adev,
bo->tbo.resource->mem_type == TTM_PL_VRAM) {
struct dma_fence *fence;
- r = amdgpu_fill_buffer(bo, 0, bo->tbo.base.resv, &fence);
+ r = amdgpu_fill_buffer(bo, 0, bo->tbo.base.resv, &fence, true);
if (unlikely(r))
goto fail_unreserve;
@@ -1354,7 +1354,7 @@ void amdgpu_bo_release_notify(struct ttm_buffer_object *bo)
if (WARN_ON_ONCE(!dma_resv_trylock(bo->base.resv)))
return;
- r = amdgpu_fill_buffer(abo, AMDGPU_POISON, bo->base.resv, &fence);
+ r = amdgpu_fill_buffer(abo, AMDGPU_POISON, bo->base.resv, &fence, true);
if (!WARN_ON(r)) {
amdgpu_bo_fence(abo, fence, false);
dma_fence_put(fence);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 34724b771ace..bbdad0dc1b07 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -384,7 +384,8 @@ static int amdgpu_move_blit(struct ttm_buffer_object *bo,
(abo->flags & AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE)) {
struct dma_fence *wipe_fence = NULL;
- r = amdgpu_fill_buffer(abo, AMDGPU_POISON, NULL, &wipe_fence);
+ r = amdgpu_fill_buffer(abo, AMDGPU_POISON, NULL, &wipe_fence,
+ false);
if (r) {
goto error;
} else if (wipe_fence) {
@@ -2040,8 +2041,18 @@ void amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev, bool enable)
r);
return;
}
+
+ r = drm_sched_entity_init(&adev->mman.delayed,
+ DRM_SCHED_PRIORITY_NORMAL, &sched,
+ 1, NULL);
+ if (r) {
+ DRM_ERROR("Failed setting up TTM BO move entity (%d)\n",
+ r);
+ goto error_free_entity;
+ }
} else {
drm_sched_entity_destroy(&adev->mman.entity);
+ drm_sched_entity_destroy(&adev->mman.delayed);
dma_fence_put(man->move);
man->move = NULL;
}
@@ -2053,6 +2064,11 @@ void amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev, bool enable)
size = adev->gmc.visible_vram_size;
man->size = size;
adev->mman.buffer_funcs_enabled = enable;
+
+ return;
+
+error_free_entity:
+ drm_sched_entity_destroy(&adev->mman.entity);
}
static int amdgpu_ttm_prepare_job(struct amdgpu_device *adev,
@@ -2060,14 +2076,16 @@ static int amdgpu_ttm_prepare_job(struct amdgpu_device *adev,
unsigned int num_dw,
struct dma_resv *resv,
bool vm_needs_flush,
- struct amdgpu_job **job)
+ struct amdgpu_job **job,
+ bool delayed)
{
enum amdgpu_ib_pool_type pool = direct_submit ?
AMDGPU_IB_POOL_DIRECT :
AMDGPU_IB_POOL_DELAYED;
int r;
-
- r = amdgpu_job_alloc_with_ib(adev, &adev->mman.entity,
+ struct drm_sched_entity *entity = delayed ? &adev->mman.delayed :
+ &adev->mman.entity;
+ r = amdgpu_job_alloc_with_ib(adev, entity,
AMDGPU_FENCE_OWNER_UNDEFINED,
num_dw * 4, pool, job);
if (r)
@@ -2108,7 +2126,7 @@ int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset,
num_loops = DIV_ROUND_UP(byte_count, max_bytes);
num_dw = ALIGN(num_loops * adev->mman.buffer_funcs->copy_num_dw, 8);
r = amdgpu_ttm_prepare_job(adev, direct_submit, num_dw,
- resv, vm_needs_flush, &job);
+ resv, vm_needs_flush, &job, false);
if (r)
return r;
@@ -2144,7 +2162,7 @@ static int amdgpu_ttm_fill_mem(struct amdgpu_ring *ring, uint32_t src_data,
uint64_t dst_addr, uint32_t byte_count,
struct dma_resv *resv,
struct dma_fence **fence,
- bool vm_needs_flush)
+ bool vm_needs_flush, bool delayed)
{
struct amdgpu_device *adev = ring->adev;
unsigned int num_loops, num_dw;
@@ -2157,7 +2175,7 @@ static int amdgpu_ttm_fill_mem(struct amdgpu_ring *ring, uint32_t src_data,
num_loops = DIV_ROUND_UP_ULL(byte_count, max_bytes);
num_dw = ALIGN(num_loops * adev->mman.buffer_funcs->fill_num_dw, 8);
r = amdgpu_ttm_prepare_job(adev, false, num_dw, resv, vm_needs_flush,
- &job);
+ &job, delayed);
if (r)
return r;
@@ -2180,7 +2198,8 @@ static int amdgpu_ttm_fill_mem(struct amdgpu_ring *ring, uint32_t src_data,
int amdgpu_fill_buffer(struct amdgpu_bo *bo,
uint32_t src_data,
struct dma_resv *resv,
- struct dma_fence **f)
+ struct dma_fence **f,
+ bool delayed)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
@@ -2209,7 +2228,7 @@ int amdgpu_fill_buffer(struct amdgpu_bo *bo,
goto error;
r = amdgpu_ttm_fill_mem(ring, src_data, to, cur_size, resv,
- &next, true);
+ &next, true, delayed);
if (r)
goto error;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
index 8ef048a0a33e..e82b1edee7a4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
@@ -61,6 +61,8 @@ struct amdgpu_mman {
struct mutex gtt_window_lock;
/* Scheduler entity for buffer moves */
struct drm_sched_entity entity;
+ /* Scheduler entity for VRAM clearing */
+ struct drm_sched_entity delayed;
struct amdgpu_vram_mgr vram_mgr;
struct amdgpu_gtt_mgr gtt_mgr;
@@ -152,7 +154,8 @@ int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
int amdgpu_fill_buffer(struct amdgpu_bo *bo,
uint32_t src_data,
struct dma_resv *resv,
- struct dma_fence **fence);
+ struct dma_fence **fence,
+ bool delayed);
int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo);
void amdgpu_ttm_recover_gart(struct ttm_buffer_object *tbo);
--
2.35.1
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