[PATCH] drm/amdgpu: allocate entities on demand
Nirmoy Das
nirmoy.aiemd at gmail.com
Fri Jan 24 11:53:11 UTC 2020
Currently we pre-allocate entities and fences for all the HW IPs on
context creation and some of which are might never be used.
This patch tries to resolve entity/fences wastage by creating entity
only when needed.
Signed-off-by: Nirmoy Das <nirmoy.das at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c | 244 +++++++++++++-----------
drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h | 2 +-
2 files changed, 135 insertions(+), 111 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
index 05c2af61e7de..73f7615df8c1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
@@ -42,19 +42,12 @@ const unsigned int amdgpu_ctx_num_entities[AMDGPU_HW_IP_NUM] = {
[AMDGPU_HW_IP_VCN_JPEG] = 1,
};
-static int amdgpu_ctx_total_num_entities(void)
-{
- unsigned i, num_entities = 0;
-
- for (i = 0; i < AMDGPU_HW_IP_NUM; ++i)
- num_entities += amdgpu_ctx_num_entities[i];
-
- return num_entities;
-}
-
static int amdgpu_ctx_priority_permit(struct drm_file *filp,
enum drm_sched_priority priority)
{
+ if (priority < 0 || priority >= DRM_SCHED_PRIORITY_MAX)
+ return -EINVAL;
+
/* NORMAL and below are accessible by everyone */
if (priority <= DRM_SCHED_PRIORITY_NORMAL)
return 0;
@@ -68,64 +61,44 @@ static int amdgpu_ctx_priority_permit(struct drm_file *filp,
return -EACCES;
}
-static int amdgpu_ctx_init(struct amdgpu_device *adev,
- enum drm_sched_priority priority,
- struct drm_file *filp,
- struct amdgpu_ctx *ctx)
+static int amdgpu_ctx_init_entity(struct amdgpu_ctx *ctx, const u32 hw_ip, const u32 ring)
{
- unsigned num_entities = amdgpu_ctx_total_num_entities();
- unsigned i, j;
+ struct amdgpu_device *adev = ctx->adev;
+ struct amdgpu_ctx_entity *entity;
+ struct drm_gpu_scheduler **scheds;
+ struct drm_gpu_scheduler *sched;
+ unsigned num_scheds = 0;
+ enum drm_sched_priority priority;
int r;
- if (priority < 0 || priority >= DRM_SCHED_PRIORITY_MAX)
- return -EINVAL;
-
- r = amdgpu_ctx_priority_permit(filp, priority);
- if (r)
- return r;
-
- memset(ctx, 0, sizeof(*ctx));
- ctx->adev = adev;
-
-
- ctx->entities[0] = kcalloc(num_entities,
- sizeof(struct amdgpu_ctx_entity),
- GFP_KERNEL);
- if (!ctx->entities[0])
- return -ENOMEM;
-
-
- for (i = 0; i < num_entities; ++i) {
- struct amdgpu_ctx_entity *entity = &ctx->entities[0][i];
-
- entity->sequence = 1;
- entity->fences = kcalloc(amdgpu_sched_jobs,
- sizeof(struct dma_fence*), GFP_KERNEL);
- if (!entity->fences) {
- r = -ENOMEM;
- goto error_cleanup_memory;
- }
+ if (!ctx->entities[hw_ip]) {
+ ctx->entities[hw_ip] = kcalloc(amdgpu_ctx_num_entities[hw_ip],
+ sizeof(struct amdgpu_ctx_entity *),
+ GFP_KERNEL);
+ if (!ctx->entities[hw_ip])
+ return -ENOMEM;
}
- for (i = 1; i < AMDGPU_HW_IP_NUM; ++i)
- ctx->entities[i] = ctx->entities[i - 1] +
- amdgpu_ctx_num_entities[i - 1];
- kref_init(&ctx->refcount);
- spin_lock_init(&ctx->ring_lock);
- mutex_init(&ctx->lock);
+ ctx->entities[hw_ip][ring] = kcalloc(1, sizeof(struct amdgpu_ctx_entity),
+ GFP_KERNEL);
+ if (!ctx->entities[hw_ip][ring]) {
+ r = -ENOMEM;
+ goto error_free_entity;
+ }
- ctx->reset_counter = atomic_read(&adev->gpu_reset_counter);
- ctx->reset_counter_query = ctx->reset_counter;
- ctx->vram_lost_counter = atomic_read(&adev->vram_lost_counter);
- ctx->init_priority = priority;
- ctx->override_priority = DRM_SCHED_PRIORITY_UNSET;
+ entity = ctx->entities[hw_ip][ring];
- for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
- struct drm_gpu_scheduler **scheds;
- struct drm_gpu_scheduler *sched;
- unsigned num_scheds = 0;
+ entity->sequence = 1;
+ entity->fences = kcalloc(amdgpu_sched_jobs,
+ sizeof(struct dma_fence*), GFP_KERNEL);
+ if (!entity->fences) {
+ r = -ENOMEM;
+ goto error_free_entity;
+ }
- switch (i) {
+ priority = (ctx->override_priority == DRM_SCHED_PRIORITY_UNSET) ?
+ ctx->init_priority : ctx->override_priority;
+ switch (hw_ip) {
case AMDGPU_HW_IP_GFX:
sched = &adev->gfx.gfx_ring[0].sched;
scheds = &sched;
@@ -166,57 +139,85 @@ static int amdgpu_ctx_init(struct amdgpu_device *adev,
scheds = adev->jpeg.jpeg_sched;
num_scheds = adev->jpeg.num_jpeg_sched;
break;
- }
-
- for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j)
- r = drm_sched_entity_init(&ctx->entities[i][j].entity,
- priority, scheds,
- num_scheds, &ctx->guilty);
- if (r)
- goto error_cleanup_entities;
}
+ r = drm_sched_entity_init(&ctx->entities[hw_ip][ring]->entity,
+ priority, scheds,
+ num_scheds, &ctx->guilty);
+ if (r)
+ goto error_free_entity;
+
return 0;
-error_cleanup_entities:
- for (i = 0; i < num_entities; ++i)
- drm_sched_entity_destroy(&ctx->entities[0][i].entity);
+error_free_entity:
+ kfree(ctx->entities[hw_ip][ring]);
+ return r;
+}
-error_cleanup_memory:
- for (i = 0; i < num_entities; ++i) {
- struct amdgpu_ctx_entity *entity = &ctx->entities[0][i];
+static int amdgpu_ctx_init(struct amdgpu_device *adev,
+ enum drm_sched_priority priority,
+ struct drm_file *filp,
+ struct amdgpu_ctx *ctx)
+{
+ int r;
- kfree(entity->fences);
- entity->fences = NULL;
- }
+ r = amdgpu_ctx_priority_permit(filp, priority);
+ if (r)
+ return r;
+
+ memset(ctx, 0, sizeof(*ctx));
+
+ ctx->adev = adev;
+
+ kref_init(&ctx->refcount);
+ spin_lock_init(&ctx->ring_lock);
+ mutex_init(&ctx->lock);
+
+ ctx->reset_counter = atomic_read(&adev->gpu_reset_counter);
+ ctx->reset_counter_query = ctx->reset_counter;
+ ctx->vram_lost_counter = atomic_read(&adev->vram_lost_counter);
+ ctx->init_priority = priority;
+ ctx->override_priority = DRM_SCHED_PRIORITY_UNSET;
+
+ return 0;
- kfree(ctx->entities[0]);
- ctx->entities[0] = NULL;
- return r;
}
static void amdgpu_ctx_fini(struct kref *ref)
{
struct amdgpu_ctx *ctx = container_of(ref, struct amdgpu_ctx, refcount);
- unsigned num_entities = amdgpu_ctx_total_num_entities();
struct amdgpu_device *adev = ctx->adev;
- unsigned i, j;
+ unsigned i, j, k;
if (!adev)
return;
- for (i = 0; i < num_entities; ++i) {
- struct amdgpu_ctx_entity *entity = &ctx->entities[0][i];
+ for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
+ for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
+ struct amdgpu_ctx_entity *entity;
+
+ if (!ctx->entities[i] || !ctx->entities[i][j])
+ continue;
+
+ entity = ctx->entities[i][j];
+ if (!entity->fences)
+ continue;
- for (j = 0; j < amdgpu_sched_jobs; ++j)
- dma_fence_put(entity->fences[j]);
+ for (k = 0; k < amdgpu_sched_jobs; ++k)
+ dma_fence_put(entity->fences[k]);
- kfree(entity->fences);
+ kfree(entity->fences);
+ entity->fences = NULL;
+
+ kfree(entity);
+ ctx->entities[i][j] = NULL;
+ }
+
+ kfree(ctx->entities[i];
+ ctx->entities[i] = NULL;
}
- kfree(ctx->entities[0]);
mutex_destroy(&ctx->lock);
-
kfree(ctx);
}
@@ -239,7 +240,11 @@ int amdgpu_ctx_get_entity(struct amdgpu_ctx *ctx, u32 hw_ip, u32 instance,
return -EINVAL;
}
- *entity = &ctx->entities[hw_ip][ring].entity;
+ if ((ctx->entities[hw_ip] == NULL) || (ctx->entities[hw_ip][ring] == NULL))
+ amdgpu_ctx_init_entity(ctx, hw_ip, ring);
+
+
+ *entity = &ctx->entities[hw_ip][ring]->entity;
return 0;
}
@@ -279,14 +284,17 @@ static int amdgpu_ctx_alloc(struct amdgpu_device *adev,
static void amdgpu_ctx_do_release(struct kref *ref)
{
struct amdgpu_ctx *ctx;
- unsigned num_entities;
- u32 i;
+ u32 i, j;
ctx = container_of(ref, struct amdgpu_ctx, refcount);
+ for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
+ for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
+ if (!ctx->entities[i] || !ctx->entities[i][j])
+ continue;
- num_entities = amdgpu_ctx_total_num_entities();
- for (i = 0; i < num_entities; i++)
- drm_sched_entity_destroy(&ctx->entities[0][i].entity);
+ drm_sched_entity_destroy(&ctx->entities[i][j]->entity);
+ }
+ }
amdgpu_ctx_fini(ref);
}
@@ -516,19 +524,23 @@ struct dma_fence *amdgpu_ctx_get_fence(struct amdgpu_ctx *ctx,
void amdgpu_ctx_priority_override(struct amdgpu_ctx *ctx,
enum drm_sched_priority priority)
{
- unsigned num_entities = amdgpu_ctx_total_num_entities();
enum drm_sched_priority ctx_prio;
- unsigned i;
+ unsigned i, j;
ctx->override_priority = priority;
ctx_prio = (ctx->override_priority == DRM_SCHED_PRIORITY_UNSET) ?
ctx->init_priority : ctx->override_priority;
+ for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
+ for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
+ struct drm_sched_entity *entity;
- for (i = 0; i < num_entities; i++) {
- struct drm_sched_entity *entity = &ctx->entities[0][i].entity;
+ if (!ctx->entities[i] || !ctx->entities[i][j])
+ continue;
- drm_sched_entity_set_priority(entity, ctx_prio);
+ entity = &ctx->entities[i][j]->entity;
+ drm_sched_entity_set_priority(entity, ctx_prio);
+ }
}
}
@@ -564,20 +576,24 @@ void amdgpu_ctx_mgr_init(struct amdgpu_ctx_mgr *mgr)
long amdgpu_ctx_mgr_entity_flush(struct amdgpu_ctx_mgr *mgr, long timeout)
{
- unsigned num_entities = amdgpu_ctx_total_num_entities();
struct amdgpu_ctx *ctx;
struct idr *idp;
- uint32_t id, i;
+ uint32_t id, i, j;
idp = &mgr->ctx_handles;
mutex_lock(&mgr->lock);
idr_for_each_entry(idp, ctx, id) {
- for (i = 0; i < num_entities; i++) {
- struct drm_sched_entity *entity;
+ for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
+ for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
+ struct drm_sched_entity *entity;
+
+ if (!ctx->entities[i] || !ctx->entities[i][j])
+ continue;
- entity = &ctx->entities[0][i].entity;
- timeout = drm_sched_entity_flush(entity, timeout);
+ entity = &ctx->entities[i][j]->entity;
+ timeout = drm_sched_entity_flush(entity, timeout);
+ }
}
}
mutex_unlock(&mgr->lock);
@@ -586,10 +602,9 @@ long amdgpu_ctx_mgr_entity_flush(struct amdgpu_ctx_mgr *mgr, long timeout)
void amdgpu_ctx_mgr_entity_fini(struct amdgpu_ctx_mgr *mgr)
{
- unsigned num_entities = amdgpu_ctx_total_num_entities();
struct amdgpu_ctx *ctx;
struct idr *idp;
- uint32_t id, i;
+ uint32_t id, i, j;
idp = &mgr->ctx_handles;
@@ -599,8 +614,17 @@ void amdgpu_ctx_mgr_entity_fini(struct amdgpu_ctx_mgr *mgr)
continue;
}
- for (i = 0; i < num_entities; i++)
- drm_sched_entity_fini(&ctx->entities[0][i].entity);
+ for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
+ for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
+ struct drm_sched_entity *entity;
+
+ if (!ctx->entities[i] || !ctx->entities[i][j])
+ continue;
+
+ entity = &ctx->entities[i][j]->entity;
+ drm_sched_entity_fini(entity);
+ }
+ }
}
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h
index a6cd9d4b078c..ca9363e71df5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h
@@ -42,7 +42,7 @@ struct amdgpu_ctx {
unsigned reset_counter_query;
uint32_t vram_lost_counter;
spinlock_t ring_lock;
- struct amdgpu_ctx_entity *entities[AMDGPU_HW_IP_NUM];
+ struct amdgpu_ctx_entity **entities[AMDGPU_HW_IP_NUM];
bool preamble_presented;
enum drm_sched_priority init_priority;
enum drm_sched_priority override_priority;
--
2.24.1
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