diff mbox series

[06/11] drm/v3d: Move drm_sched_job_init to v3d_job_init

Message ID 20210624140025.438303-7-daniel.vetter@ffwll.ch (mailing list archive)
State New, archived
Headers show
Series drm/scheduler dependency tracking | expand

Commit Message

Daniel Vetter June 24, 2021, 2 p.m. UTC 
Prep work for using the scheduler dependency handling.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Emma Anholt <emma@anholt.net>
---
 drivers/gpu/drm/v3d/v3d_gem.c | 64 +++++++++++------------------------
 1 file changed, 20 insertions(+), 44 deletions(-)

Comments

Emma Anholt June 24, 2021, 4:59 p.m. UTC | #1 
On Thu, Jun 24, 2021 at 7:00 AM Daniel Vetter <daniel.vetter@ffwll.ch> wrote:
>
> Prep work for using the scheduler dependency handling.
>
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> Cc: Emma Anholt <emma@anholt.net>

Back when I wrote this, I think there were rules that there had to be
no failure paths between a job_init and a push.  Has that changed?

I really don't have the context to evaluate this, I'm not sure what
new "scheduler dependency handling" is given that there was already
something that I considered to be dependency handling!
Daniel Vetter June 24, 2021, 5:24 p.m. UTC | #2 
On Thu, Jun 24, 2021 at 09:59:08AM -0700, Emma Anholt wrote:
> On Thu, Jun 24, 2021 at 7:00 AM Daniel Vetter <daniel.vetter@ffwll.ch> wrote:
> >
> > Prep work for using the scheduler dependency handling.

I'll add "We need to call drm_sched_job_init earlier so we can use the new
drm_sched_job_await* functions for dependency handling here. That gives a
bit more context on what's going on here.

> >
> > Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> > Cc: Emma Anholt <emma@anholt.net>
> 
> Back when I wrote this, I think there were rules that there had to be
> no failure paths between a job_init and a push.  Has that changed?
> 
> I really don't have the context to evaluate this, I'm not sure what
> new "scheduler dependency handling" is given that there was already
> something that I considered to be dependency handling!

Full patch series link:

https://lore.kernel.org/dri-devel/20210624140025.438303-1-daniel.vetter@ffwll.ch/T/#t


The job_init vs push_job is addressed here:

https://lore.kernel.org/dri-devel/20210624140025.438303-1-daniel.vetter@ffwll.ch/T/#mb6c4d75e1c57a5056d7b2ec8fbb9839fc5be41a7

I split job_init into job_init (which can fail, and be done earlier) and
job_arm (which can't fail, and must be atomic with the push_job).

The entire goal of this is to lift the dependency handling from "everyone
copypastes v3d" to "drm_sched has it for you already", which is this patch
here:

https://lore.kernel.org/dri-devel/20210624140025.438303-1-daniel.vetter@ffwll.ch/T/#m9f64aaf840cbf8815cd2ea9a68f99a51da9baa5f

Cheers, Daniel
diff mbox series

Patch

diff --git a/drivers/gpu/drm/v3d/v3d_gem.c b/drivers/gpu/drm/v3d/v3d_gem.c
index ac608eb9b594..40302c77e667 100644
--- a/drivers/gpu/drm/v3d/v3d_gem.c
+++ b/drivers/gpu/drm/v3d/v3d_gem.c
@@ -433,9 +433,10 @@  v3d_wait_bo_ioctl(struct drm_device *dev, void *data,
 static int
 v3d_job_init(struct v3d_dev *v3d, struct drm_file *file_priv,
 	     struct v3d_job *job, void (*free)(struct kref *ref),
-	     u32 in_sync)
+	     u32 in_sync, enum v3d_queue queue)
 {
 	struct dma_fence *in_fence = NULL;
+	struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
 	int ret;
 
 	job->v3d = v3d;
@@ -446,6 +447,10 @@  v3d_job_init(struct v3d_dev *v3d, struct drm_file *file_priv,
 		return ret;
 
 	xa_init_flags(&job->deps, XA_FLAGS_ALLOC);
+	ret = drm_sched_job_init(&job->base, &v3d_priv->sched_entity[queue],
+				 v3d_priv);
+	if (ret)
+		goto fail;
 
 	ret = drm_syncobj_find_fence(file_priv, in_sync, 0, 0, &in_fence);
 	if (ret == -EINVAL)
@@ -464,25 +469,15 @@  v3d_job_init(struct v3d_dev *v3d, struct drm_file *file_priv,
 	return ret;
 }
 
-static int
-v3d_push_job(struct v3d_file_priv *v3d_priv,
-	     struct v3d_job *job, enum v3d_queue queue)
+static void
+v3d_push_job(struct v3d_job *job)
 {
-	int ret;
-
-	ret = drm_sched_job_init(&job->base, &v3d_priv->sched_entity[queue],
-				 v3d_priv);
-	if (ret)
-		return ret;
-
 	job->done_fence = dma_fence_get(&job->base.s_fence->finished);
 
 	/* put by scheduler job completion */
 	kref_get(&job->refcount);
 
 	drm_sched_entity_push_job(&job->base);
-
-	return 0;
 }
 
 static void
@@ -528,7 +523,6 @@  v3d_submit_cl_ioctl(struct drm_device *dev, void *data,
 		    struct drm_file *file_priv)
 {
 	struct v3d_dev *v3d = to_v3d_dev(dev);
-	struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
 	struct drm_v3d_submit_cl *args = data;
 	struct v3d_bin_job *bin = NULL;
 	struct v3d_render_job *render;
@@ -554,7 +548,7 @@  v3d_submit_cl_ioctl(struct drm_device *dev, void *data,
 	INIT_LIST_HEAD(&render->unref_list);
 
 	ret = v3d_job_init(v3d, file_priv, &render->base,
-			   v3d_render_job_free, args->in_sync_rcl);
+			   v3d_render_job_free, args->in_sync_rcl, V3D_RENDER);
 	if (ret) {
 		kfree(render);
 		return ret;
@@ -568,7 +562,7 @@  v3d_submit_cl_ioctl(struct drm_device *dev, void *data,
 		}
 
 		ret = v3d_job_init(v3d, file_priv, &bin->base,
-				   v3d_job_free, args->in_sync_bcl);
+				   v3d_job_free, args->in_sync_bcl, V3D_BIN);
 		if (ret) {
 			v3d_job_put(&render->base);
 			kfree(bin);
@@ -590,7 +584,7 @@  v3d_submit_cl_ioctl(struct drm_device *dev, void *data,
 			goto fail;
 		}
 
-		ret = v3d_job_init(v3d, file_priv, clean_job, v3d_job_free, 0);
+		ret = v3d_job_init(v3d, file_priv, clean_job, v3d_job_free, 0, V3D_CACHE_CLEAN);
 		if (ret) {
 			kfree(clean_job);
 			clean_job = NULL;
@@ -613,9 +607,7 @@  v3d_submit_cl_ioctl(struct drm_device *dev, void *data,
 
 	mutex_lock(&v3d->sched_lock);
 	if (bin) {
-		ret = v3d_push_job(v3d_priv, &bin->base, V3D_BIN);
-		if (ret)
-			goto fail_unreserve;
+		v3d_push_job(&bin->base);
 
 		ret = drm_gem_fence_array_add(&render->base.deps,
 					      dma_fence_get(bin->base.done_fence));
@@ -623,9 +615,7 @@  v3d_submit_cl_ioctl(struct drm_device *dev, void *data,
 			goto fail_unreserve;
 	}
 
-	ret = v3d_push_job(v3d_priv, &render->base, V3D_RENDER);
-	if (ret)
-		goto fail_unreserve;
+	v3d_push_job(&render->base);
 
 	if (clean_job) {
 		struct dma_fence *render_fence =
@@ -633,9 +623,7 @@  v3d_submit_cl_ioctl(struct drm_device *dev, void *data,
 		ret = drm_gem_fence_array_add(&clean_job->deps, render_fence);
 		if (ret)
 			goto fail_unreserve;
-		ret = v3d_push_job(v3d_priv, clean_job, V3D_CACHE_CLEAN);
-		if (ret)
-			goto fail_unreserve;
+		v3d_push_job(clean_job);
 	}
 
 	mutex_unlock(&v3d->sched_lock);
@@ -682,7 +670,6 @@  v3d_submit_tfu_ioctl(struct drm_device *dev, void *data,
 		     struct drm_file *file_priv)
 {
 	struct v3d_dev *v3d = to_v3d_dev(dev);
-	struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
 	struct drm_v3d_submit_tfu *args = data;
 	struct v3d_tfu_job *job;
 	struct ww_acquire_ctx acquire_ctx;
@@ -695,7 +682,7 @@  v3d_submit_tfu_ioctl(struct drm_device *dev, void *data,
 		return -ENOMEM;
 
 	ret = v3d_job_init(v3d, file_priv, &job->base,
-			   v3d_job_free, args->in_sync);
+			   v3d_job_free, args->in_sync, V3D_TFU);
 	if (ret) {
 		kfree(job);
 		return ret;
@@ -739,9 +726,7 @@  v3d_submit_tfu_ioctl(struct drm_device *dev, void *data,
 		goto fail;
 
 	mutex_lock(&v3d->sched_lock);
-	ret = v3d_push_job(v3d_priv, &job->base, V3D_TFU);
-	if (ret)
-		goto fail_unreserve;
+	v3d_push_job(&job->base);
 	mutex_unlock(&v3d->sched_lock);
 
 	v3d_attach_fences_and_unlock_reservation(file_priv,
@@ -753,10 +738,6 @@  v3d_submit_tfu_ioctl(struct drm_device *dev, void *data,
 
 	return 0;
 
-fail_unreserve:
-	mutex_unlock(&v3d->sched_lock);
-	drm_gem_unlock_reservations(job->base.bo, job->base.bo_count,
-				    &acquire_ctx);
 fail:
 	v3d_job_put(&job->base);
 
@@ -777,7 +758,6 @@  v3d_submit_csd_ioctl(struct drm_device *dev, void *data,
 		     struct drm_file *file_priv)
 {
 	struct v3d_dev *v3d = to_v3d_dev(dev);
-	struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
 	struct drm_v3d_submit_csd *args = data;
 	struct v3d_csd_job *job;
 	struct v3d_job *clean_job;
@@ -796,7 +776,7 @@  v3d_submit_csd_ioctl(struct drm_device *dev, void *data,
 		return -ENOMEM;
 
 	ret = v3d_job_init(v3d, file_priv, &job->base,
-			   v3d_job_free, args->in_sync);
+			   v3d_job_free, args->in_sync, V3D_CSD);
 	if (ret) {
 		kfree(job);
 		return ret;
@@ -809,7 +789,7 @@  v3d_submit_csd_ioctl(struct drm_device *dev, void *data,
 		return -ENOMEM;
 	}
 
-	ret = v3d_job_init(v3d, file_priv, clean_job, v3d_job_free, 0);
+	ret = v3d_job_init(v3d, file_priv, clean_job, v3d_job_free, 0, V3D_CACHE_CLEAN);
 	if (ret) {
 		v3d_job_put(&job->base);
 		kfree(clean_job);
@@ -828,18 +808,14 @@  v3d_submit_csd_ioctl(struct drm_device *dev, void *data,
 		goto fail;
 
 	mutex_lock(&v3d->sched_lock);
-	ret = v3d_push_job(v3d_priv, &job->base, V3D_CSD);
-	if (ret)
-		goto fail_unreserve;
+	v3d_push_job(&job->base);
 
 	ret = drm_gem_fence_array_add(&clean_job->deps,
 				      dma_fence_get(job->base.done_fence));
 	if (ret)
 		goto fail_unreserve;
 
-	ret = v3d_push_job(v3d_priv, clean_job, V3D_CACHE_CLEAN);
-	if (ret)
-		goto fail_unreserve;
+	v3d_push_job(clean_job);
 	mutex_unlock(&v3d->sched_lock);
 
 	v3d_attach_fences_and_unlock_reservation(file_priv,