[PATCH 05/15] drm/panfrost: Use xarray and helpers for depedency tracking
Daniel Vetter
daniel.vetter at ffwll.ch
Tue Jun 22 16:55:01 UTC 2021
More consistency and prep work for the next patch.
Aside: I wonder whether we shouldn't just move this entire xarray
business into the scheduler so that not everyone has to reinvent the
same wheels. Cc'ing some scheduler people for this too.
v2: Correctly handle sched_lock since Lucas pointed out it's needed.
v3: Rebase, dma_resv_get_excl_unlocked got renamed
v4: Don't leak job references on failure (Steven).
Cc: Lucas Stach <l.stach at pengutronix.de>
Cc: "Christian König" <christian.koenig at amd.com>
Cc: Luben Tuikov <luben.tuikov at amd.com>
Cc: Alex Deucher <alexander.deucher at amd.com>
Cc: Lee Jones <lee.jones at linaro.org>
Cc: Steven Price <steven.price at arm.com>
Cc: Rob Herring <robh at kernel.org>
Cc: Tomeu Vizoso <tomeu.vizoso at collabora.com>
Cc: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Cc: Sumit Semwal <sumit.semwal at linaro.org>
Cc: linux-media at vger.kernel.org
Cc: linaro-mm-sig at lists.linaro.org
Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
drivers/gpu/drm/panfrost/panfrost_drv.c | 41 +++++++---------
drivers/gpu/drm/panfrost/panfrost_job.c | 65 +++++++++++--------------
drivers/gpu/drm/panfrost/panfrost_job.h | 8 ++-
3 files changed, 49 insertions(+), 65 deletions(-)
diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
index 075ec0ef746c..3ee828f1e7a5 100644
--- a/drivers/gpu/drm/panfrost/panfrost_drv.c
+++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
@@ -138,12 +138,6 @@ panfrost_lookup_bos(struct drm_device *dev,
if (!job->bo_count)
return 0;
- job->implicit_fences = kvmalloc_array(job->bo_count,
- sizeof(struct dma_fence *),
- GFP_KERNEL | __GFP_ZERO);
- if (!job->implicit_fences)
- return -ENOMEM;
-
ret = drm_gem_objects_lookup(file_priv,
(void __user *)(uintptr_t)args->bo_handles,
job->bo_count, &job->bos);
@@ -174,7 +168,7 @@ panfrost_lookup_bos(struct drm_device *dev,
}
/**
- * panfrost_copy_in_sync() - Sets up job->in_fences[] with the sync objects
+ * panfrost_copy_in_sync() - Sets up job->deps with the sync objects
* referenced by the job.
* @dev: DRM device
* @file_priv: DRM file for this fd
@@ -194,22 +188,14 @@ panfrost_copy_in_sync(struct drm_device *dev,
{
u32 *handles;
int ret = 0;
- int i;
+ int i, in_fence_count;
- job->in_fence_count = args->in_sync_count;
+ in_fence_count = args->in_sync_count;
- if (!job->in_fence_count)
+ if (!in_fence_count)
return 0;
- job->in_fences = kvmalloc_array(job->in_fence_count,
- sizeof(struct dma_fence *),
- GFP_KERNEL | __GFP_ZERO);
- if (!job->in_fences) {
- DRM_DEBUG("Failed to allocate job in fences\n");
- return -ENOMEM;
- }
-
- handles = kvmalloc_array(job->in_fence_count, sizeof(u32), GFP_KERNEL);
+ handles = kvmalloc_array(in_fence_count, sizeof(u32), GFP_KERNEL);
if (!handles) {
ret = -ENOMEM;
DRM_DEBUG("Failed to allocate incoming syncobj handles\n");
@@ -218,16 +204,23 @@ panfrost_copy_in_sync(struct drm_device *dev,
if (copy_from_user(handles,
(void __user *)(uintptr_t)args->in_syncs,
- job->in_fence_count * sizeof(u32))) {
+ in_fence_count * sizeof(u32))) {
ret = -EFAULT;
DRM_DEBUG("Failed to copy in syncobj handles\n");
goto fail;
}
- for (i = 0; i < job->in_fence_count; i++) {
+ for (i = 0; i < in_fence_count; i++) {
+ struct dma_fence *fence;
+
ret = drm_syncobj_find_fence(file_priv, handles[i], 0, 0,
- &job->in_fences[i]);
- if (ret == -EINVAL)
+ &fence);
+ if (ret)
+ goto fail;
+
+ ret = drm_gem_fence_array_add(&job->deps, fence);
+
+ if (ret)
goto fail;
}
@@ -265,6 +258,8 @@ static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
kref_init(&job->refcount);
+ xa_init_flags(&job->deps, XA_FLAGS_ALLOC);
+
job->pfdev = pfdev;
job->jc = args->jc;
job->requirements = args->requirements;
diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c
index 38f8580c19f1..71cd43fa1b36 100644
--- a/drivers/gpu/drm/panfrost/panfrost_job.c
+++ b/drivers/gpu/drm/panfrost/panfrost_job.c
@@ -196,14 +196,21 @@ static void panfrost_job_hw_submit(struct panfrost_job *job, int js)
job_write(pfdev, JS_COMMAND_NEXT(js), JS_COMMAND_START);
}
-static void panfrost_acquire_object_fences(struct drm_gem_object **bos,
- int bo_count,
- struct dma_fence **implicit_fences)
+static int panfrost_acquire_object_fences(struct drm_gem_object **bos,
+ int bo_count,
+ struct xarray *deps)
{
- int i;
+ int i, ret;
- for (i = 0; i < bo_count; i++)
- implicit_fences[i] = dma_resv_get_excl_unlocked(bos[i]->resv);
+ for (i = 0; i < bo_count; i++) {
+ struct dma_fence *fence = dma_resv_get_excl_unlocked(bos[i]->resv);
+
+ ret = drm_gem_fence_array_add(deps, fence);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
}
static void panfrost_attach_object_fences(struct drm_gem_object **bos,
@@ -240,10 +247,14 @@ int panfrost_job_push(struct panfrost_job *job)
job->render_done_fence = dma_fence_get(&job->base.s_fence->finished);
- kref_get(&job->refcount); /* put by scheduler job completion */
+ ret = panfrost_acquire_object_fences(job->bos, job->bo_count,
+ &job->deps);
+ if (ret) {
+ mutex_unlock(&pfdev->sched_lock);
+ goto unlock;
+ }
- panfrost_acquire_object_fences(job->bos, job->bo_count,
- job->implicit_fences);
+ kref_get(&job->refcount); /* put by scheduler job completion */
drm_sched_entity_push_job(&job->base, entity);
@@ -262,18 +273,15 @@ static void panfrost_job_cleanup(struct kref *ref)
{
struct panfrost_job *job = container_of(ref, struct panfrost_job,
refcount);
+ struct dma_fence *fence;
+ unsigned long index;
unsigned int i;
- if (job->in_fences) {
- for (i = 0; i < job->in_fence_count; i++)
- dma_fence_put(job->in_fences[i]);
- kvfree(job->in_fences);
- }
- if (job->implicit_fences) {
- for (i = 0; i < job->bo_count; i++)
- dma_fence_put(job->implicit_fences[i]);
- kvfree(job->implicit_fences);
+ xa_for_each(&job->deps, index, fence) {
+ dma_fence_put(fence);
}
+ xa_destroy(&job->deps);
+
dma_fence_put(job->done_fence);
dma_fence_put(job->render_done_fence);
@@ -316,26 +324,9 @@ static struct dma_fence *panfrost_job_dependency(struct drm_sched_job *sched_job
struct drm_sched_entity *s_entity)
{
struct panfrost_job *job = to_panfrost_job(sched_job);
- struct dma_fence *fence;
- unsigned int i;
-
- /* Explicit fences */
- for (i = 0; i < job->in_fence_count; i++) {
- if (job->in_fences[i]) {
- fence = job->in_fences[i];
- job->in_fences[i] = NULL;
- return fence;
- }
- }
- /* Implicit fences, max. one per BO */
- for (i = 0; i < job->bo_count; i++) {
- if (job->implicit_fences[i]) {
- fence = job->implicit_fences[i];
- job->implicit_fences[i] = NULL;
- return fence;
- }
- }
+ if (!xa_empty(&job->deps))
+ return xa_erase(&job->deps, job->last_dep++);
return NULL;
}
diff --git a/drivers/gpu/drm/panfrost/panfrost_job.h b/drivers/gpu/drm/panfrost/panfrost_job.h
index bbd3ba97ff67..82306a03b57e 100644
--- a/drivers/gpu/drm/panfrost/panfrost_job.h
+++ b/drivers/gpu/drm/panfrost/panfrost_job.h
@@ -19,9 +19,9 @@ struct panfrost_job {
struct panfrost_device *pfdev;
struct panfrost_file_priv *file_priv;
- /* Optional fences userspace can pass in for the job to depend on. */
- struct dma_fence **in_fences;
- u32 in_fence_count;
+ /* Contains both explicit and implicit fences */
+ struct xarray deps;
+ unsigned long last_dep;
/* Fence to be signaled by IRQ handler when the job is complete. */
struct dma_fence *done_fence;
@@ -30,8 +30,6 @@ struct panfrost_job {
__u32 requirements;
__u32 flush_id;
- /* Exclusive fences we have taken from the BOs to wait for */
- struct dma_fence **implicit_fences;
struct panfrost_gem_mapping **mappings;
struct drm_gem_object **bos;
u32 bo_count;
--
2.32.0.rc2
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