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From: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
To: "Christian König" <ckoenig.leichtzumerken@gmail.com>,
	linaro-mm-sig@lists.linaro.org, dri-devel@lists.freedesktop.org,
	linux-media@vger.kernel.org, intel-gfx@lists.freedesktop.org
Cc: daniel@ffwll.ch
Subject: Re: [PATCH 13/26] drm/i915: use the new iterator in i915_gem_busy_ioctl
Date: Wed, 22 Sep 2021 11:21:32 +0100	[thread overview]
Message-ID: <6b22cb75-6c41-db55-83f2-3eae87b585aa@linux.intel.com> (raw)
In-Reply-To: <20210922091044.2612-14-christian.koenig@amd.com>


On 22/09/2021 10:10, Christian König wrote:
> This makes the function much simpler since the complex
> retry logic is now handled else where.
> 
> Signed-off-by: Christian König <christian.koenig@amd.com>
> ---
>   drivers/gpu/drm/i915/gem/i915_gem_busy.c | 35 ++++++++++--------------
>   1 file changed, 14 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_busy.c b/drivers/gpu/drm/i915/gem/i915_gem_busy.c
> index 6234e17259c1..313afb4a11c7 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_busy.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_busy.c
> @@ -82,8 +82,8 @@ i915_gem_busy_ioctl(struct drm_device *dev, void *data,
>   {
>   	struct drm_i915_gem_busy *args = data;
>   	struct drm_i915_gem_object *obj;
> -	struct dma_resv_list *list;
> -	unsigned int seq;
> +	struct dma_resv_iter cursor;
> +	struct dma_fence *fence;
>   	int err;
>   
>   	err = -ENOENT;
> @@ -109,27 +109,20 @@ i915_gem_busy_ioctl(struct drm_device *dev, void *data,
>   	 * to report the overall busyness. This is what the wait-ioctl does.
>   	 *
>   	 */
> -retry:
> -	seq = raw_read_seqcount(&obj->base.resv->seq);
> -
> -	/* Translate the exclusive fence to the READ *and* WRITE engine */
> -	args->busy = busy_check_writer(dma_resv_excl_fence(obj->base.resv));
> -
> -	/* Translate shared fences to READ set of engines */
> -	list = dma_resv_shared_list(obj->base.resv);
> -	if (list) {
> -		unsigned int shared_count = list->shared_count, i;
> -
> -		for (i = 0; i < shared_count; ++i) {
> -			struct dma_fence *fence =
> -				rcu_dereference(list->shared[i]);
> -
> +	args->busy = false;

You can drop this line, especially since it is not a boolean. With that:

Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

Regards,

Tvrtko

> +	dma_resv_iter_begin(&cursor, obj->base.resv, true);
> +	dma_resv_for_each_fence_unlocked(&cursor, fence) {
> +		if (dma_resv_iter_is_restarted(&cursor))
> +			args->busy = 0;
> +
> +		if (dma_resv_iter_is_exclusive(&cursor))
> +			/* Translate the exclusive fence to the READ *and* WRITE engine */
> +			args->busy |= busy_check_writer(fence);
> +		else
> +			/* Translate shared fences to READ set of engines */
>   			args->busy |= busy_check_reader(fence);
> -		}
>   	}
> -
> -	if (args->busy && read_seqcount_retry(&obj->base.resv->seq, seq))
> -		goto retry;
> +	dma_resv_iter_end(&cursor);
>   
>   	err = 0;
>   out:
> 

WARNING: multiple messages have this Message-ID
From: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
To: "Christian König" <ckoenig.leichtzumerken@gmail.com>,
	linaro-mm-sig@lists.linaro.org, dri-devel@lists.freedesktop.org,
	linux-media@vger.kernel.org, intel-gfx@lists.freedesktop.org
Cc: daniel@ffwll.ch
Subject: Re: [Intel-gfx] [PATCH 13/26] drm/i915: use the new iterator in i915_gem_busy_ioctl
Date: Wed, 22 Sep 2021 11:21:32 +0100	[thread overview]
Message-ID: <6b22cb75-6c41-db55-83f2-3eae87b585aa@linux.intel.com> (raw)
In-Reply-To: <20210922091044.2612-14-christian.koenig@amd.com>


On 22/09/2021 10:10, Christian König wrote:
> This makes the function much simpler since the complex
> retry logic is now handled else where.
> 
> Signed-off-by: Christian König <christian.koenig@amd.com>
> ---
>   drivers/gpu/drm/i915/gem/i915_gem_busy.c | 35 ++++++++++--------------
>   1 file changed, 14 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_busy.c b/drivers/gpu/drm/i915/gem/i915_gem_busy.c
> index 6234e17259c1..313afb4a11c7 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_busy.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_busy.c
> @@ -82,8 +82,8 @@ i915_gem_busy_ioctl(struct drm_device *dev, void *data,
>   {
>   	struct drm_i915_gem_busy *args = data;
>   	struct drm_i915_gem_object *obj;
> -	struct dma_resv_list *list;
> -	unsigned int seq;
> +	struct dma_resv_iter cursor;
> +	struct dma_fence *fence;
>   	int err;
>   
>   	err = -ENOENT;
> @@ -109,27 +109,20 @@ i915_gem_busy_ioctl(struct drm_device *dev, void *data,
>   	 * to report the overall busyness. This is what the wait-ioctl does.
>   	 *
>   	 */
> -retry:
> -	seq = raw_read_seqcount(&obj->base.resv->seq);
> -
> -	/* Translate the exclusive fence to the READ *and* WRITE engine */
> -	args->busy = busy_check_writer(dma_resv_excl_fence(obj->base.resv));
> -
> -	/* Translate shared fences to READ set of engines */
> -	list = dma_resv_shared_list(obj->base.resv);
> -	if (list) {
> -		unsigned int shared_count = list->shared_count, i;
> -
> -		for (i = 0; i < shared_count; ++i) {
> -			struct dma_fence *fence =
> -				rcu_dereference(list->shared[i]);
> -
> +	args->busy = false;

You can drop this line, especially since it is not a boolean. With that:

Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

Regards,

Tvrtko

> +	dma_resv_iter_begin(&cursor, obj->base.resv, true);
> +	dma_resv_for_each_fence_unlocked(&cursor, fence) {
> +		if (dma_resv_iter_is_restarted(&cursor))
> +			args->busy = 0;
> +
> +		if (dma_resv_iter_is_exclusive(&cursor))
> +			/* Translate the exclusive fence to the READ *and* WRITE engine */
> +			args->busy |= busy_check_writer(fence);
> +		else
> +			/* Translate shared fences to READ set of engines */
>   			args->busy |= busy_check_reader(fence);
> -		}
>   	}
> -
> -	if (args->busy && read_seqcount_retry(&obj->base.resv->seq, seq))
> -		goto retry;
> +	dma_resv_iter_end(&cursor);
>   
>   	err = 0;
>   out:
> 

  reply	other threads:[~2021-09-22 10:21 UTC|newest]

Thread overview: 87+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-22  9:10 Deploying new iterator interface for dma-buf Christian König
2021-09-22  9:10 ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 01/26] dma-buf: add dma_resv_for_each_fence_unlocked v4 Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22 14:36   ` Tvrtko Ursulin
2021-09-22 14:36     ` [Intel-gfx] " Tvrtko Ursulin
2021-09-22 14:50     ` Christian König
2021-09-22 14:50       ` [Intel-gfx] " Christian König
2021-09-22 15:09       ` Tvrtko Ursulin
2021-09-22 15:09         ` [Intel-gfx] " Tvrtko Ursulin
2021-09-22  9:10 ` [PATCH 02/26] dma-buf: add dma_resv_for_each_fence Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 03/26] dma-buf: use new iterator in dma_resv_copy_fences Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 04/26] dma-buf: use new iterator in dma_resv_get_fences v2 Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 05/26] dma-buf: use new iterator in dma_resv_wait_timeout Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 06/26] dma-buf: use new iterator in dma_resv_test_signaled Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 07/26] drm/ttm: use the new iterator in ttm_bo_flush_all_fences Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 08/26] drm/amdgpu: use the new iterator in amdgpu_sync_resv Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 09/26] drm/amdgpu: use new iterator in amdgpu_ttm_bo_eviction_valuable Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 10/26] drm/msm: use new iterator in msm_gem_describe Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 11/26] drm/radeon: use new iterator in radeon_sync_resv Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 12/26] drm/scheduler: use new iterator in drm_sched_job_add_implicit_dependencies v2 Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 13/26] drm/i915: use the new iterator in i915_gem_busy_ioctl Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22 10:21   ` Tvrtko Ursulin [this message]
2021-09-22 10:21     ` Tvrtko Ursulin
2021-09-22 11:46     ` Tvrtko Ursulin
2021-09-22 11:46       ` [Intel-gfx] " Tvrtko Ursulin
2021-09-22 12:15       ` Christian König
2021-09-22 12:15         ` [Intel-gfx] " Christian König
2021-09-22 12:20         ` Tvrtko Ursulin
2021-09-22 12:20           ` [Intel-gfx] " Tvrtko Ursulin
2021-09-22 12:22           ` Christian König
2021-09-22 12:22             ` [Intel-gfx] " Christian König
2021-09-22 14:31     ` Christian König
2021-09-22 14:31       ` [Intel-gfx] " Christian König
2021-09-22 14:39       ` Tvrtko Ursulin
2021-09-22 14:39         ` [Intel-gfx] " Tvrtko Ursulin
2021-09-22  9:10 ` [PATCH 14/26] drm/i915: use the new iterator in i915_sw_fence_await_reservation v3 Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 15/26] drm/i915: use the new iterator in i915_request_await_object v2 Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22 10:34   ` Tvrtko Ursulin
2021-09-22 10:34     ` Tvrtko Ursulin
2021-09-22  9:10 ` [PATCH 16/26] drm/i915: use new iterator in i915_gem_object_wait_reservation Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 17/26] drm/i915: use new iterator in i915_gem_object_wait_priority Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 18/26] drm/i915: use new iterator in i915_gem_object_last_write_engine Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22 10:27   ` Tvrtko Ursulin
2021-09-22 10:27     ` [Intel-gfx] " Tvrtko Ursulin
2021-09-22 11:00     ` Christian König
2021-09-22 11:00       ` [Intel-gfx] " Christian König
2021-09-22 11:12       ` Tvrtko Ursulin
2021-09-22 11:12         ` [Intel-gfx] " Tvrtko Ursulin
2021-09-22  9:10 ` [PATCH 19/26] drm/i915: use new cursor in intel_prepare_plane_fb Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 20/26] drm: use new iterator in drm_gem_fence_array_add_implicit v3 Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 21/26] drm: use new iterator in drm_gem_plane_helper_prepare_fb Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 22/26] drm/nouveau: use the new iterator in nouveau_fence_sync Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 23/26] drm/nouveau: use the new interator in nv50_wndw_prepare_fb Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 24/26] drm/etnaviv: use new iterator in etnaviv_gem_describe Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 25/26] drm/etnaviv: replace dma_resv_get_excl_unlocked Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22  9:10 ` [PATCH 26/26] dma-buf: nuke dma_resv_get_excl_unlocked Christian König
2021-09-22  9:10   ` [Intel-gfx] " Christian König
2021-09-22 12:55 ` [Intel-gfx] ✗ Fi.CI.BUILD: failure for series starting with [01/26] dma-buf: add dma_resv_for_each_fence_unlocked v4 Patchwork
  -- strict thread matches above, loose matches on Subject: below --
2021-09-21 17:36 [PATCH 01/26] dma-buf: add dma_resv_for_each_fence_unlocked v3 Christian König
2021-09-21 17:36 ` [PATCH 13/26] drm/i915: use the new iterator in i915_gem_busy_ioctl Christian König
2021-09-17 12:34 Deploying new iterator interface for dma-buf Christian König
2021-09-17 12:35 ` [PATCH 13/26] drm/i915: use the new iterator in i915_gem_busy_ioctl Christian König
2021-09-16 11:30 Deploying new iterator interface for dma-buf Christian König
2021-09-16 11:30 ` [PATCH 13/26] drm/i915: use the new iterator in i915_gem_busy_ioctl Christian König
2021-09-13 13:16 Deploying new iterator interface for dma-buf Christian König
2021-09-13 13:16 ` [PATCH 13/26] drm/i915: use the new iterator in i915_gem_busy_ioctl Christian König

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