[PATCH 1/1] drm/amdgpu: disable gpu_sched load balancer for vcn jobs
Nirmoy Das
nirmoy.aiemd at gmail.com
Wed Mar 11 20:00:32 UTC 2020
VCN HW doesn't support dynamic load balance on multiple
instances for a context. This patch modifies entity's
sched_list to a sched_list consist of only one drm scheduler.
Signed-off-by: Nirmoy Das <nirmoy.das at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 4 ++++
drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c | 13 +++++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h | 1 +
drivers/gpu/drm/amd/amdgpu/amdgpu_job.c | 3 +++
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h | 1 +
drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c | 2 ++
drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c | 2 ++
drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c | 2 ++
8 files changed, 28 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index 8304d0c87899..db0eef19c636 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -1203,6 +1203,7 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
union drm_amdgpu_cs *cs)
{
struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
+ struct amdgpu_ring *ring = to_amdgpu_ring(p->entity->rq->sched);
struct drm_sched_entity *entity = p->entity;
enum drm_sched_priority priority;
struct amdgpu_bo_list_entry *e;
@@ -1257,6 +1258,9 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
priority = job->base.s_priority;
drm_sched_entity_push_job(&job->base, entity);
+ if (ring->funcs->no_gpu_sched_loadbalance)
+ amdgpu_ctx_disable_gpu_sched_load_balance(entity);
+
amdgpu_vm_move_to_lru_tail(p->adev, &fpriv->vm);
ttm_eu_fence_buffer_objects(&p->ticket, &p->validated, p->fence);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
index fa575bdc03c8..1127e8f77721 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
@@ -559,6 +559,19 @@ void amdgpu_ctx_priority_override(struct amdgpu_ctx *ctx,
}
}
+/**
+ * amdgpu_ctx_disable_gpu_sched_load_balance - disable gpu_sched's load balancer
+ * @entity: entity on which load balancer will be disabled
+ */
+void amdgpu_ctx_disable_gpu_sched_load_balance(struct drm_sched_entity *entity)
+{
+ struct drm_gpu_scheduler **scheds = &entity->rq->sched;
+
+ /* disable gpu_sched's job load balancer by assigning only one */
+ /* drm scheduler to the entity */
+ drm_sched_entity_modify_sched(entity, scheds, 1);
+}
+
int amdgpu_ctx_wait_prev_fence(struct amdgpu_ctx *ctx,
struct drm_sched_entity *entity)
{
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h
index de490f183af2..3a2f900b8000 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h
@@ -90,5 +90,6 @@ void amdgpu_ctx_mgr_fini(struct amdgpu_ctx_mgr *mgr);
void amdgpu_ctx_init_sched(struct amdgpu_device *adev);
+void amdgpu_ctx_disable_gpu_sched_load_balance(struct drm_sched_entity *entity);
#endif
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
index 4981e443a884..64dad7ba74da 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
@@ -140,6 +140,7 @@ void amdgpu_job_free(struct amdgpu_job *job)
int amdgpu_job_submit(struct amdgpu_job *job, struct drm_sched_entity *entity,
void *owner, struct dma_fence **f)
{
+ struct amdgpu_ring *ring = to_amdgpu_ring(entity->rq->sched);
enum drm_sched_priority priority;
int r;
@@ -154,6 +155,8 @@ int amdgpu_job_submit(struct amdgpu_job *job, struct drm_sched_entity *entity,
amdgpu_job_free_resources(job);
priority = job->base.s_priority;
drm_sched_entity_push_job(&job->base, entity);
+ if (ring->funcs->no_gpu_sched_loadbalance)
+ amdgpu_ctx_disable_gpu_sched_load_balance(entity);
return 0;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
index 448c76cbf3ed..f78fe1a6912b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
@@ -115,6 +115,7 @@ struct amdgpu_ring_funcs {
u32 nop;
bool support_64bit_ptrs;
bool no_user_fence;
+ bool no_gpu_sched_loadbalance;
unsigned vmhub;
unsigned extra_dw;
diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c b/drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c
index 71f61afdc655..749ccdb5fbfb 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c
@@ -1871,6 +1871,7 @@ static const struct amdgpu_ring_funcs vcn_v1_0_dec_ring_vm_funcs = {
.align_mask = 0xf,
.support_64bit_ptrs = false,
.no_user_fence = true,
+ .no_gpu_sched_loadbalance = true,
.vmhub = AMDGPU_MMHUB_0,
.get_rptr = vcn_v1_0_dec_ring_get_rptr,
.get_wptr = vcn_v1_0_dec_ring_get_wptr,
@@ -1905,6 +1906,7 @@ static const struct amdgpu_ring_funcs vcn_v1_0_enc_ring_vm_funcs = {
.nop = VCN_ENC_CMD_NO_OP,
.support_64bit_ptrs = false,
.no_user_fence = true,
+ .no_gpu_sched_loadbalance = true,
.vmhub = AMDGPU_MMHUB_0,
.get_rptr = vcn_v1_0_enc_ring_get_rptr,
.get_wptr = vcn_v1_0_enc_ring_get_wptr,
diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c b/drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c
index f2745fd1ddb3..c48423b54bc5 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c
@@ -1954,6 +1954,7 @@ static const struct amd_ip_funcs vcn_v2_0_ip_funcs = {
static const struct amdgpu_ring_funcs vcn_v2_0_dec_ring_vm_funcs = {
.type = AMDGPU_RING_TYPE_VCN_DEC,
.align_mask = 0xf,
+ .no_gpu_sched_loadbalance = true,
.vmhub = AMDGPU_MMHUB_0,
.get_rptr = vcn_v2_0_dec_ring_get_rptr,
.get_wptr = vcn_v2_0_dec_ring_get_wptr,
@@ -1984,6 +1985,7 @@ static const struct amdgpu_ring_funcs vcn_v2_0_dec_ring_vm_funcs = {
static const struct amdgpu_ring_funcs vcn_v2_0_enc_ring_vm_funcs = {
.type = AMDGPU_RING_TYPE_VCN_ENC,
.align_mask = 0x3f,
+ .no_gpu_sched_loadbalance = true,
.nop = VCN_ENC_CMD_NO_OP,
.vmhub = AMDGPU_MMHUB_0,
.get_rptr = vcn_v2_0_enc_ring_get_rptr,
diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c b/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c
index 9b22e2b55132..1cc8e1420fc8 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c
@@ -1478,6 +1478,7 @@ static void vcn_v2_5_dec_ring_set_wptr(struct amdgpu_ring *ring)
static const struct amdgpu_ring_funcs vcn_v2_5_dec_ring_vm_funcs = {
.type = AMDGPU_RING_TYPE_VCN_DEC,
.align_mask = 0xf,
+ .no_gpu_sched_loadbalance = true,
.vmhub = AMDGPU_MMHUB_1,
.get_rptr = vcn_v2_5_dec_ring_get_rptr,
.get_wptr = vcn_v2_5_dec_ring_get_wptr,
@@ -1577,6 +1578,7 @@ static void vcn_v2_5_enc_ring_set_wptr(struct amdgpu_ring *ring)
static const struct amdgpu_ring_funcs vcn_v2_5_enc_ring_vm_funcs = {
.type = AMDGPU_RING_TYPE_VCN_ENC,
.align_mask = 0x3f,
+ .no_gpu_sched_loadbalance = true,
.nop = VCN_ENC_CMD_NO_OP,
.vmhub = AMDGPU_MMHUB_1,
.get_rptr = vcn_v2_5_enc_ring_get_rptr,
--
2.25.0
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