Re: [PATCH v5 11/20] drm/etnaviv: Use scheduler dependency handling

Daniel Vetter
2021-08-12T19:28:43Z

On Thu, Aug 05, 2021 at 12:46:56PM +0200, Daniel Vetter wrote:
> We need to pull the drm_sched_job_init much earlier, but that's very
> minor surgery.
>
> v2: Actually fix up cleanup paths by calling drm_sched_job_init, which
> I wanted to to in the previous round (and did, for all other drivers).
> Spotted by Lucas.
>
> v3: Rebase over renamed functions to add dependencies.
>
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> Cc: Lucas Stach <l.stach@pengutronix.de>
> Cc: Russell King <linux+etnaviv@armlinux.org.uk>
> Cc: Christian Gmeiner <christian.gmeiner@gmail.com>
> Cc: Sumit Semwal <sumit.semwal@linaro.org>
> Cc: "Christian König" <christian.koenig@amd.com>
> Cc: etnaviv@lists.freedesktop.org
> Cc: linux-media@vger.kernel.org
> Cc: linaro-mm-sig@lists.linaro.org

Ping for an ack&testing please.
-Daniel

> ---
> drivers/gpu/drm/etnaviv/etnaviv_gem.h | 5 +-
> drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c | 60 ++++++++++---------
> drivers/gpu/drm/etnaviv/etnaviv_sched.c | 63 +-------------------
> drivers/gpu/drm/etnaviv/etnaviv_sched.h | 3 +-
> 4 files changed, 37 insertions(+), 94 deletions(-)
>
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.h b/drivers/gpu/drm/etnaviv/etnaviv_gem.h
> index 98e60df882b6..63688e6e4580 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_gem.h
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.h
> @@ -80,9 +80,6 @@ struct etnaviv_gem_submit_bo {
> u64 va;
> struct etnaviv_gem_object *obj;
> struct etnaviv_vram_mapping *mapping;
> - struct dma_fence *excl;
> - unsigned int nr_shared;
> - struct dma_fence **shared;
> };
>
> /* Created per submit-ioctl, to track bo's and cmdstream bufs, etc,
> @@ -95,7 +92,7 @@ struct etnaviv_gem_submit {
> struct etnaviv_file_private *ctx;
> struct etnaviv_gpu *gpu;
> struct etnaviv_iommu_context *mmu_context, *prev_mmu_context;
> - struct dma_fence *out_fence, *in_fence;
> + struct dma_fence *out_fence;
> int out_fence_id;
> struct list_head node; /* GPU active submit list */
> struct etnaviv_cmdbuf cmdbuf;
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
> index 4dd7d9d541c0..e3d43678eb09 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
> @@ -188,16 +188,11 @@ static int submit_fence_sync(struct etnaviv_gem_submit *submit)
> if (submit->flags & ETNA_SUBMIT_NO_IMPLICIT)
> continue;
>
> - if (bo->flags & ETNA_SUBMIT_BO_WRITE) {
> - ret = dma_resv_get_fences(robj, &bo->excl,
> - &bo->nr_shared,
> - &bo->shared);
> - if (ret)
> - return ret;
> - } else {
> - bo->excl = dma_resv_get_excl_unlocked(robj);
> - }
> -
> + ret = drm_sched_job_add_implicit_dependencies(&submit->sched_job,
> + &bo->obj->base,
> + bo->flags & ETNA_SUBMIT_BO_WRITE);
> + if (ret)
> + return ret;
> }
>
> return ret;
> @@ -403,8 +398,6 @@ static void submit_cleanup(struct kref *kref)
>
> wake_up_all(&submit->gpu->fence_event);
>
> - if (submit->in_fence)
> - dma_fence_put(submit->in_fence);
> if (submit->out_fence) {
> /* first remove from IDR, so fence can not be found anymore */
> mutex_lock(&submit->gpu->fence_lock);
> @@ -529,7 +522,7 @@ int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
> ret = etnaviv_cmdbuf_init(priv->cmdbuf_suballoc, &submit->cmdbuf,
> ALIGN(args->stream_size, 8) + 8);
> if (ret)
> - goto err_submit_objects;
> + goto err_submit_put;
>
> submit->ctx = file->driver_priv;
> etnaviv_iommu_context_get(submit->ctx->mmu);
> @@ -537,51 +530,62 @@ int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
> submit->exec_state = args->exec_state;
> submit->flags = args->flags;
>
> + ret = drm_sched_job_init(&submit->sched_job,
> + &ctx->sched_entity[args->pipe],
> + submit->ctx);
> + if (ret)
> + goto err_submit_put;
> +
> ret = submit_lookup_objects(submit, file, bos, args->nr_bos);
> if (ret)
> - goto err_submit_objects;
> + goto err_submit_job;
>
> if ((priv->mmu_global->version != ETNAVIV_IOMMU_V2) &&
> !etnaviv_cmd_validate_one(gpu, stream, args->stream_size / 4,
> relocs, args->nr_relocs)) {
> ret = -EINVAL;
> - goto err_submit_objects;
> + goto err_submit_job;
> }
>
> if (args->flags & ETNA_SUBMIT_FENCE_FD_IN) {
> - submit->in_fence = sync_file_get_fence(args->fence_fd);
> - if (!submit->in_fence) {
> + struct dma_fence *in_fence = sync_file_get_fence(args->fence_fd);
> + if (!in_fence) {
> ret = -EINVAL;
> - goto err_submit_objects;
> + goto err_submit_job;
> }
> +
> + ret = drm_sched_job_add_dependency(&submit->sched_job,
> + in_fence);
> + if (ret)
> + goto err_submit_job;
> }
>
> ret = submit_pin_objects(submit);
> if (ret)
> - goto err_submit_objects;
> + goto err_submit_job;
>
> ret = submit_reloc(submit, stream, args->stream_size / 4,
> relocs, args->nr_relocs);
> if (ret)
> - goto err_submit_objects;
> + goto err_submit_job;
>
> ret = submit_perfmon_validate(submit, args->exec_state, pmrs);
> if (ret)
> - goto err_submit_objects;
> + goto err_submit_job;
>
> memcpy(submit->cmdbuf.vaddr, stream, args->stream_size);
>
> ret = submit_lock_objects(submit, &ticket);
> if (ret)
> - goto err_submit_objects;
> + goto err_submit_job;
>
> ret = submit_fence_sync(submit);
> if (ret)
> - goto err_submit_objects;
> + goto err_submit_job;
>
> - ret = etnaviv_sched_push_job(&ctx->sched_entity[args->pipe], submit);
> + ret = etnaviv_sched_push_job(submit);
> if (ret)
> - goto err_submit_objects;
> + goto err_submit_job;
>
> submit_attach_object_fences(submit);
>
> @@ -595,7 +599,7 @@ int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
> sync_file = sync_file_create(submit->out_fence);
> if (!sync_file) {
> ret = -ENOMEM;
> - goto err_submit_objects;
> + goto err_submit_job;
> }
> fd_install(out_fence_fd, sync_file->file);
> }
> @@ -603,7 +607,9 @@ int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
> args->fence_fd = out_fence_fd;
> args->fence = submit->out_fence_id;
>
> -err_submit_objects:
> +err_submit_job:
> + drm_sched_job_cleanup(&submit->sched_job);
> +err_submit_put:
> etnaviv_submit_put(submit);
>
> err_submit_ww_acquire:
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_sched.c b/drivers/gpu/drm/etnaviv/etnaviv_sched.c
> index 180bb633d5c5..2bbbd6ccc95e 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_sched.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_sched.c
> @@ -17,58 +17,6 @@ module_param_named(job_hang_limit, etnaviv_job_hang_limit, int , 0444);
> static int etnaviv_hw_jobs_limit = 4;
> module_param_named(hw_job_limit, etnaviv_hw_jobs_limit, int , 0444);
>
> -static struct dma_fence *
> -etnaviv_sched_dependency(struct drm_sched_job *sched_job,
> - struct drm_sched_entity *entity)
> -{
> - struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
> - struct dma_fence *fence;
> - int i;
> -
> - if (unlikely(submit->in_fence)) {
> - fence = submit->in_fence;
> - submit->in_fence = NULL;
> -
> - if (!dma_fence_is_signaled(fence))
> - return fence;
> -
> - dma_fence_put(fence);
> - }
> -
> - for (i = 0; i < submit->nr_bos; i++) {
> - struct etnaviv_gem_submit_bo *bo = &submit->bos[i];
> - int j;
> -
> - if (bo->excl) {
> - fence = bo->excl;
> - bo->excl = NULL;
> -
> - if (!dma_fence_is_signaled(fence))
> - return fence;
> -
> - dma_fence_put(fence);
> - }
> -
> - for (j = 0; j < bo->nr_shared; j++) {
> - if (!bo->shared[j])
> - continue;
> -
> - fence = bo->shared[j];
> - bo->shared[j] = NULL;
> -
> - if (!dma_fence_is_signaled(fence))
> - return fence;
> -
> - dma_fence_put(fence);
> - }
> - kfree(bo->shared);
> - bo->nr_shared = 0;
> - bo->shared = NULL;
> - }
> -
> - return NULL;
> -}
> -
> static struct dma_fence *etnaviv_sched_run_job(struct drm_sched_job *sched_job)
> {
> struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
> @@ -140,29 +88,22 @@ static void etnaviv_sched_free_job(struct drm_sched_job *sched_job)
> }
>
> static const struct drm_sched_backend_ops etnaviv_sched_ops = {
> - .dependency = etnaviv_sched_dependency,
> .run_job = etnaviv_sched_run_job,
> .timedout_job = etnaviv_sched_timedout_job,
> .free_job = etnaviv_sched_free_job,
> };
>
> -int etnaviv_sched_push_job(struct drm_sched_entity *sched_entity,
> - struct etnaviv_gem_submit *submit)
> +int etnaviv_sched_push_job(struct etnaviv_gem_submit *submit)
> {
> int ret = 0;
>
> /*
> * Hold the fence lock across the whole operation to avoid jobs being
> * pushed out of order with regard to their sched fence seqnos as
> - * allocated in drm_sched_job_init.
> + * allocated in drm_sched_job_arm.
> */
> mutex_lock(&submit->gpu->fence_lock);
>
> - ret = drm_sched_job_init(&submit->sched_job, sched_entity,
> - submit->ctx);
> - if (ret)
> - goto out_unlock;
> -
> drm_sched_job_arm(&submit->sched_job);
>
> submit->out_fence = dma_fence_get(&submit->sched_job.s_fence->finished);
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_sched.h b/drivers/gpu/drm/etnaviv/etnaviv_sched.h
> index c0a6796e22c9..baebfa069afc 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_sched.h
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_sched.h
> @@ -18,7 +18,6 @@ struct etnaviv_gem_submit *to_etnaviv_submit(struct drm_sched_job *sched_job)
>
> int etnaviv_sched_init(struct etnaviv_gpu *gpu);
> void etnaviv_sched_fini(struct etnaviv_gpu *gpu);
> -int etnaviv_sched_push_job(struct drm_sched_entity *sched_entity,
> - struct etnaviv_gem_submit *submit);
> +int etnaviv_sched_push_job(struct etnaviv_gem_submit *submit);
>
> #endif /* __ETNAVIV_SCHED_H__ */
> --
> 2.32.0
>

--
Daniel Vetter
Software Engineer, Intel Corporation