[PATCH v5 3/7] drm/sched: Move schedule policy to scheduler
Matthew Brost
matthew.brost at intel.com
Wed Oct 11 23:58:22 UTC 2023
Rather than a global modparam for scheduling policy, move the scheduling
policy to scheduler so user can control each scheduler policy.
v2:
- s/DRM_SCHED_POLICY_MAX/DRM_SCHED_POLICY_COUNT (Luben)
- Only include policy in scheduler (Luben)
v3:
- use a ternary operator as opposed to an if-control (Luben)
- s/DRM_SCHED_POLICY_DEFAULT/DRM_SCHED_POLICY_UNSET/ (Luben)
- s/default_drm_sched_policy/drm_sched_policy_default/ (Luben)
- Update commit message (Boris)
- Fix v3d build (CI)
- s/bad_policies/drm_sched_policy_mismatch/ (Luben)
- Don't update modparam doc (Luben)
v4:
- Fix alignment in msm_ringbuffer_new (Luben / checkpatch)
Reviewed-by: Luben Tuikov <luben.tuikov at amd.com>
Signed-off-by: Matthew Brost <matthew.brost at intel.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 1 +
drivers/gpu/drm/etnaviv/etnaviv_sched.c | 3 ++-
drivers/gpu/drm/lima/lima_sched.c | 3 ++-
drivers/gpu/drm/msm/msm_ringbuffer.c | 2 +-
drivers/gpu/drm/nouveau/nouveau_sched.c | 3 ++-
drivers/gpu/drm/panfrost/panfrost_job.c | 3 ++-
drivers/gpu/drm/scheduler/sched_entity.c | 24 ++++++++++++++++++----
drivers/gpu/drm/scheduler/sched_main.c | 19 ++++++++++++-----
drivers/gpu/drm/v3d/v3d_sched.c | 15 +++++++++-----
include/drm/gpu_scheduler.h | 20 ++++++++++++------
10 files changed, 68 insertions(+), 25 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index b54c4d771104..e4e6f91450a4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2283,6 +2283,7 @@ static int amdgpu_device_init_schedulers(struct amdgpu_device *adev)
ring->num_hw_submission, 0,
timeout, adev->reset_domain->wq,
ring->sched_score, ring->name,
+ DRM_SCHED_POLICY_UNSET,
adev->dev);
if (r) {
DRM_ERROR("Failed to create scheduler on ring %s.\n",
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_sched.c b/drivers/gpu/drm/etnaviv/etnaviv_sched.c
index 618a804ddc34..15b0e2f1abe5 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_sched.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_sched.c
@@ -137,7 +137,8 @@ int etnaviv_sched_init(struct etnaviv_gpu *gpu)
ret = drm_sched_init(&gpu->sched, &etnaviv_sched_ops, NULL,
etnaviv_hw_jobs_limit, etnaviv_job_hang_limit,
msecs_to_jiffies(500), NULL, NULL,
- dev_name(gpu->dev), gpu->dev);
+ dev_name(gpu->dev), DRM_SCHED_POLICY_UNSET,
+ gpu->dev);
if (ret)
return ret;
diff --git a/drivers/gpu/drm/lima/lima_sched.c b/drivers/gpu/drm/lima/lima_sched.c
index 8d858aed0e56..50c2075228aa 100644
--- a/drivers/gpu/drm/lima/lima_sched.c
+++ b/drivers/gpu/drm/lima/lima_sched.c
@@ -491,7 +491,8 @@ int lima_sched_pipe_init(struct lima_sched_pipe *pipe, const char *name)
return drm_sched_init(&pipe->base, &lima_sched_ops, NULL, 1,
lima_job_hang_limit,
msecs_to_jiffies(timeout), NULL,
- NULL, name, pipe->ldev->dev);
+ NULL, name, DRM_SCHED_POLICY_UNSET,
+ pipe->ldev->dev);
}
void lima_sched_pipe_fini(struct lima_sched_pipe *pipe)
diff --git a/drivers/gpu/drm/msm/msm_ringbuffer.c b/drivers/gpu/drm/msm/msm_ringbuffer.c
index 1097f8e93d6b..173ad2f17c50 100644
--- a/drivers/gpu/drm/msm/msm_ringbuffer.c
+++ b/drivers/gpu/drm/msm/msm_ringbuffer.c
@@ -97,7 +97,7 @@ struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id,
ret = drm_sched_init(&ring->sched, &msm_sched_ops, NULL,
num_hw_submissions, 0, sched_timeout,
NULL, NULL, to_msm_bo(ring->bo)->name,
- gpu->dev->dev);
+ DRM_SCHED_POLICY_UNSET, gpu->dev->dev);
if (ret) {
goto fail;
}
diff --git a/drivers/gpu/drm/nouveau/nouveau_sched.c b/drivers/gpu/drm/nouveau/nouveau_sched.c
index 4c959dec42b3..c4e09d2e77f9 100644
--- a/drivers/gpu/drm/nouveau/nouveau_sched.c
+++ b/drivers/gpu/drm/nouveau/nouveau_sched.c
@@ -437,7 +437,8 @@ int nouveau_sched_init(struct nouveau_drm *drm)
return drm_sched_init(sched, &nouveau_sched_ops, NULL,
NOUVEAU_SCHED_HW_SUBMISSIONS, 0, job_hang_limit,
- NULL, NULL, "nouveau_sched", drm->dev->dev);
+ NULL, NULL, "nouveau_sched",
+ DRM_SCHED_POLICY_UNSET, drm->dev->dev);
}
void nouveau_sched_fini(struct nouveau_drm *drm)
diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c
index 934b7b930c76..95330ff402ba 100644
--- a/drivers/gpu/drm/panfrost/panfrost_job.c
+++ b/drivers/gpu/drm/panfrost/panfrost_job.c
@@ -856,7 +856,8 @@ int panfrost_job_init(struct panfrost_device *pfdev)
nentries, 0,
msecs_to_jiffies(JOB_TIMEOUT_MS),
pfdev->reset.wq,
- NULL, "pan_js", pfdev->dev);
+ NULL, "pan_js", DRM_SCHED_POLICY_UNSET,
+ pfdev->dev);
if (ret) {
dev_err(pfdev->dev, "Failed to create scheduler: %d.", ret);
goto err_sched;
diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c
index a42763e1429d..cf42e2265d64 100644
--- a/drivers/gpu/drm/scheduler/sched_entity.c
+++ b/drivers/gpu/drm/scheduler/sched_entity.c
@@ -33,6 +33,20 @@
#define to_drm_sched_job(sched_job) \
container_of((sched_job), struct drm_sched_job, queue_node)
+static bool drm_sched_policy_mismatch(struct drm_gpu_scheduler **sched_list,
+ unsigned int num_sched_list)
+{
+ enum drm_sched_policy sched_policy = sched_list[0]->sched_policy;
+ unsigned int i;
+
+ /* All schedule policies must match */
+ for (i = 1; i < num_sched_list; ++i)
+ if (sched_policy != sched_list[i]->sched_policy)
+ return true;
+
+ return false;
+}
+
/**
* drm_sched_entity_init - Init a context entity used by scheduler when
* submit to HW ring.
@@ -62,7 +76,8 @@ int drm_sched_entity_init(struct drm_sched_entity *entity,
unsigned int num_sched_list,
atomic_t *guilty)
{
- if (!(entity && sched_list && (num_sched_list == 0 || sched_list[0])))
+ if (!(entity && sched_list && (num_sched_list == 0 || sched_list[0])) ||
+ drm_sched_policy_mismatch(sched_list, num_sched_list))
return -EINVAL;
memset(entity, 0, sizeof(struct drm_sched_entity));
@@ -486,7 +501,7 @@ struct drm_sched_job *drm_sched_entity_pop_job(struct drm_sched_entity *entity)
* Update the entity's location in the min heap according to
* the timestamp of the next job, if any.
*/
- if (drm_sched_policy == DRM_SCHED_POLICY_FIFO) {
+ if (entity->rq->sched->sched_policy == DRM_SCHED_POLICY_FIFO) {
struct drm_sched_job *next;
next = to_drm_sched_job(spsc_queue_peek(&entity->job_queue));
@@ -558,7 +573,8 @@ void drm_sched_entity_select_rq(struct drm_sched_entity *entity)
void drm_sched_entity_push_job(struct drm_sched_job *sched_job)
{
struct drm_sched_entity *entity = sched_job->entity;
- bool first;
+ bool first, fifo = entity->rq->sched->sched_policy ==
+ DRM_SCHED_POLICY_FIFO;
ktime_t submit_ts;
trace_drm_sched_job(sched_job, entity);
@@ -587,7 +603,7 @@ void drm_sched_entity_push_job(struct drm_sched_job *sched_job)
drm_sched_rq_add_entity(entity->rq, entity);
spin_unlock(&entity->rq_lock);
- if (drm_sched_policy == DRM_SCHED_POLICY_FIFO)
+ if (fifo)
drm_sched_rq_update_fifo(entity, submit_ts);
drm_sched_wakeup_if_can_queue(entity->rq->sched);
diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
index 8b1d52cff1e9..150e5330f0fa 100644
--- a/drivers/gpu/drm/scheduler/sched_main.c
+++ b/drivers/gpu/drm/scheduler/sched_main.c
@@ -66,14 +66,14 @@
#define to_drm_sched_job(sched_job) \
container_of((sched_job), struct drm_sched_job, queue_node)
-int drm_sched_policy = DRM_SCHED_POLICY_FIFO;
+int drm_sched_policy_default = DRM_SCHED_POLICY_FIFO;
/**
* DOC: sched_policy (int)
* Used to override default entities scheduling policy in a run queue.
*/
MODULE_PARM_DESC(sched_policy, "Specify the scheduling policy for entities on a run-queue, " __stringify(DRM_SCHED_POLICY_RR) " = Round Robin, " __stringify(DRM_SCHED_POLICY_FIFO) " = FIFO (default).");
-module_param_named(sched_policy, drm_sched_policy, int, 0444);
+module_param_named(sched_policy, drm_sched_policy_default, int, 0444);
static __always_inline bool drm_sched_entity_compare_before(struct rb_node *a,
const struct rb_node *b)
@@ -177,7 +177,7 @@ void drm_sched_rq_remove_entity(struct drm_sched_rq *rq,
if (rq->current_entity == entity)
rq->current_entity = NULL;
- if (drm_sched_policy == DRM_SCHED_POLICY_FIFO)
+ if (rq->sched->sched_policy == DRM_SCHED_POLICY_FIFO)
drm_sched_rq_remove_fifo_locked(entity);
spin_unlock(&rq->lock);
@@ -898,7 +898,7 @@ drm_sched_select_entity(struct drm_gpu_scheduler *sched)
/* Kernel run queue has higher priority than normal run queue*/
for (i = DRM_SCHED_PRIORITY_COUNT - 1; i >= DRM_SCHED_PRIORITY_MIN; i--) {
- entity = drm_sched_policy == DRM_SCHED_POLICY_FIFO ?
+ entity = sched->sched_policy == DRM_SCHED_POLICY_FIFO ?
drm_sched_rq_select_entity_fifo(&sched->sched_rq[i]) :
drm_sched_rq_select_entity_rr(&sched->sched_rq[i]);
if (entity)
@@ -1072,6 +1072,7 @@ static void drm_sched_main(struct work_struct *w)
* used
* @score: optional score atomic shared with other schedulers
* @name: name used for debugging
+ * @sched_policy: schedule policy
* @dev: target &struct device
*
* Return 0 on success, otherwise error code.
@@ -1081,9 +1082,15 @@ int drm_sched_init(struct drm_gpu_scheduler *sched,
struct workqueue_struct *submit_wq,
unsigned hw_submission, unsigned hang_limit,
long timeout, struct workqueue_struct *timeout_wq,
- atomic_t *score, const char *name, struct device *dev)
+ atomic_t *score, const char *name,
+ enum drm_sched_policy sched_policy,
+ struct device *dev)
{
int i;
+
+ if (sched_policy >= DRM_SCHED_POLICY_COUNT)
+ return -EINVAL;
+
sched->ops = ops;
sched->hw_submission_limit = hw_submission;
sched->name = name;
@@ -1102,6 +1109,8 @@ int drm_sched_init(struct drm_gpu_scheduler *sched,
sched->hang_limit = hang_limit;
sched->score = score ? score : &sched->_score;
sched->dev = dev;
+ sched->sched_policy = sched_policy == DRM_SCHED_POLICY_UNSET ?
+ drm_sched_policy_default : sched_policy;
for (i = DRM_SCHED_PRIORITY_MIN; i < DRM_SCHED_PRIORITY_COUNT; i++)
drm_sched_rq_init(sched, &sched->sched_rq[i]);
diff --git a/drivers/gpu/drm/v3d/v3d_sched.c b/drivers/gpu/drm/v3d/v3d_sched.c
index 38e092ea41e6..dec89c5b8cb1 100644
--- a/drivers/gpu/drm/v3d/v3d_sched.c
+++ b/drivers/gpu/drm/v3d/v3d_sched.c
@@ -391,7 +391,8 @@ v3d_sched_init(struct v3d_dev *v3d)
&v3d_bin_sched_ops, NULL,
hw_jobs_limit, job_hang_limit,
msecs_to_jiffies(hang_limit_ms), NULL,
- NULL, "v3d_bin", v3d->drm.dev);
+ NULL, "v3d_bin", DRM_SCHED_POLICY_UNSET,
+ v3d->drm.dev);
if (ret)
return ret;
@@ -399,7 +400,8 @@ v3d_sched_init(struct v3d_dev *v3d)
&v3d_render_sched_ops, NULL,
hw_jobs_limit, job_hang_limit,
msecs_to_jiffies(hang_limit_ms), NULL,
- NULL, "v3d_render", v3d->drm.dev);
+ NULL, "v3d_render", DRM_SCHED_POLICY_UNSET,
+ v3d->drm.dev);
if (ret)
goto fail;
@@ -407,7 +409,8 @@ v3d_sched_init(struct v3d_dev *v3d)
&v3d_tfu_sched_ops, NULL,
hw_jobs_limit, job_hang_limit,
msecs_to_jiffies(hang_limit_ms), NULL,
- NULL, "v3d_tfu", v3d->drm.dev);
+ NULL, "v3d_tfu", DRM_SCHED_POLICY_UNSET,
+ v3d->drm.dev);
if (ret)
goto fail;
@@ -416,7 +419,8 @@ v3d_sched_init(struct v3d_dev *v3d)
&v3d_csd_sched_ops, NULL,
hw_jobs_limit, job_hang_limit,
msecs_to_jiffies(hang_limit_ms), NULL,
- NULL, "v3d_csd", v3d->drm.dev);
+ NULL, "v3d_csd", DRM_SCHED_POLICY_UNSET,
+ v3d->drm.dev);
if (ret)
goto fail;
@@ -424,7 +428,8 @@ v3d_sched_init(struct v3d_dev *v3d)
&v3d_cache_clean_sched_ops, NULL,
hw_jobs_limit, job_hang_limit,
msecs_to_jiffies(hang_limit_ms), NULL,
- NULL, "v3d_cache_clean", v3d->drm.dev);
+ NULL, "v3d_cache_clean",
+ DRM_SCHED_POLICY_UNSET, v3d->drm.dev);
if (ret)
goto fail;
}
diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h
index 211bd3cdabdc..320f0a720486 100644
--- a/include/drm/gpu_scheduler.h
+++ b/include/drm/gpu_scheduler.h
@@ -72,11 +72,15 @@ enum drm_sched_priority {
DRM_SCHED_PRIORITY_UNSET = -2
};
-/* Used to chose between FIFO and RR jobs scheduling */
-extern int drm_sched_policy;
-
-#define DRM_SCHED_POLICY_RR 0
-#define DRM_SCHED_POLICY_FIFO 1
+/* Used to chose default scheduling policy*/
+extern int default_drm_sched_policy;
+
+enum drm_sched_policy {
+ DRM_SCHED_POLICY_UNSET,
+ DRM_SCHED_POLICY_RR,
+ DRM_SCHED_POLICY_FIFO,
+ DRM_SCHED_POLICY_COUNT,
+};
/**
* struct drm_sched_entity - A wrapper around a job queue (typically
@@ -489,6 +493,7 @@ struct drm_sched_backend_ops {
* guilty and it will no longer be considered for scheduling.
* @score: score to help loadbalancer pick a idle sched
* @_score: score used when the driver doesn't provide one
+ * @sched_policy: Schedule policy for scheduler
* @ready: marks if the underlying HW is ready to work
* @free_guilty: A hit to time out handler to free the guilty job.
* @pause_submit: pause queuing of @work_submit on @submit_wq
@@ -515,6 +520,7 @@ struct drm_gpu_scheduler {
int hang_limit;
atomic_t *score;
atomic_t _score;
+ enum drm_sched_policy sched_policy;
bool ready;
bool free_guilty;
bool pause_submit;
@@ -527,7 +533,9 @@ int drm_sched_init(struct drm_gpu_scheduler *sched,
struct workqueue_struct *submit_wq,
uint32_t hw_submission, unsigned hang_limit,
long timeout, struct workqueue_struct *timeout_wq,
- atomic_t *score, const char *name, struct device *dev);
+ atomic_t *score, const char *name,
+ enum drm_sched_policy sched_policy,
+ struct device *dev);
void drm_sched_fini(struct drm_gpu_scheduler *sched);
int drm_sched_job_init(struct drm_sched_job *job,
--
2.34.1
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