Re: [PATCH 2/4] drm/gem: Delete gem array fencing helpers

["Christian König" <christian.koenig@amd.com>]

Am 04.04.22 um 15:15 schrieb Daniel Vetter:
> On Thu, Mar 31, 2022 at 10:46:49PM +0200, Daniel Vetter wrote:
>> Integrated into the scheduler now and all users converted over.
>>
>> v2: Rebased over changes from König.
>>
>> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
>> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
>> Cc: Maxime Ripard <mripard@kernel.org>
>> Cc: Thomas Zimmermann <tzimmermann@suse.de>
>> Cc: David Airlie <airlied@linux.ie>
>> Cc: Daniel Vetter <daniel@ffwll.ch>
>> Cc: Sumit Semwal <sumit.semwal@linaro.org>
>> Cc: "Christian König" <christian.koenig@amd.com>
>> Cc: linux-media@vger.kernel.org
>> Cc: linaro-mm-sig@lists.linaro.org
> Anyone up for an ack for this one here?

Acked-by: Christian König <christian.koenig@amd.com>

Please land that ASAP so that I can rebase on top.

Thanks,
Christian.

>
> Thanks, Daniel
>
>> ---
>>   drivers/gpu/drm/drm_gem.c | 80 ---------------------------------------
>>   include/drm/drm_gem.h     |  5 ---
>>   2 files changed, 85 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
>> index 56fb87885146..133dfae06fab 100644
>> --- a/drivers/gpu/drm/drm_gem.c
>> +++ b/drivers/gpu/drm/drm_gem.c
>> @@ -1273,83 +1273,3 @@ drm_gem_unlock_reservations(struct drm_gem_object **objs, int count,
>>   	ww_acquire_fini(acquire_ctx);
>>   }
>>   EXPORT_SYMBOL(drm_gem_unlock_reservations);
>> -
>> -/**
>> - * drm_gem_fence_array_add - Adds the fence to an array of fences to be
>> - * waited on, deduplicating fences from the same context.
>> - *
>> - * @fence_array: array of dma_fence * for the job to block on.
>> - * @fence: the dma_fence to add to the list of dependencies.
>> - *
>> - * This functions consumes the reference for @fence both on success and error
>> - * cases.
>> - *
>> - * Returns:
>> - * 0 on success, or an error on failing to expand the array.
>> - */
>> -int drm_gem_fence_array_add(struct xarray *fence_array,
>> -			    struct dma_fence *fence)
>> -{
>> -	struct dma_fence *entry;
>> -	unsigned long index;
>> -	u32 id = 0;
>> -	int ret;
>> -
>> -	if (!fence)
>> -		return 0;
>> -
>> -	/* Deduplicate if we already depend on a fence from the same context.
>> -	 * This lets the size of the array of deps scale with the number of
>> -	 * engines involved, rather than the number of BOs.
>> -	 */
>> -	xa_for_each(fence_array, index, entry) {
>> -		if (entry->context != fence->context)
>> -			continue;
>> -
>> -		if (dma_fence_is_later(fence, entry)) {
>> -			dma_fence_put(entry);
>> -			xa_store(fence_array, index, fence, GFP_KERNEL);
>> -		} else {
>> -			dma_fence_put(fence);
>> -		}
>> -		return 0;
>> -	}
>> -
>> -	ret = xa_alloc(fence_array, &id, fence, xa_limit_32b, GFP_KERNEL);
>> -	if (ret != 0)
>> -		dma_fence_put(fence);
>> -
>> -	return ret;
>> -}
>> -EXPORT_SYMBOL(drm_gem_fence_array_add);
>> -
>> -/**
>> - * drm_gem_fence_array_add_implicit - Adds the implicit dependencies tracked
>> - * in the GEM object's reservation object to an array of dma_fences for use in
>> - * scheduling a rendering job.
>> - *
>> - * This should be called after drm_gem_lock_reservations() on your array of
>> - * GEM objects used in the job but before updating the reservations with your
>> - * own fences.
>> - *
>> - * @fence_array: array of dma_fence * for the job to block on.
>> - * @obj: the gem object to add new dependencies from.
>> - * @write: whether the job might write the object (so we need to depend on
>> - * shared fences in the reservation object).
>> - */
>> -int drm_gem_fence_array_add_implicit(struct xarray *fence_array,
>> -				     struct drm_gem_object *obj,
>> -				     bool write)
>> -{
>> -	struct dma_resv_iter cursor;
>> -	struct dma_fence *fence;
>> -	int ret = 0;
>> -
>> -	dma_resv_for_each_fence(&cursor, obj->resv, write, fence) {
>> -		ret = drm_gem_fence_array_add(fence_array, fence);
>> -		if (ret)
>> -			break;
>> -	}
>> -	return ret;
>> -}
>> -EXPORT_SYMBOL(drm_gem_fence_array_add_implicit);
>> diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h
>> index e2941cee14b6..9d7c61a122dc 100644
>> --- a/include/drm/drm_gem.h
>> +++ b/include/drm/drm_gem.h
>> @@ -407,11 +407,6 @@ int drm_gem_lock_reservations(struct drm_gem_object **objs, int count,
>>   			      struct ww_acquire_ctx *acquire_ctx);
>>   void drm_gem_unlock_reservations(struct drm_gem_object **objs, int count,
>>   				 struct ww_acquire_ctx *acquire_ctx);
>> -int drm_gem_fence_array_add(struct xarray *fence_array,
>> -			    struct dma_fence *fence);
>> -int drm_gem_fence_array_add_implicit(struct xarray *fence_array,
>> -				     struct drm_gem_object *obj,
>> -				     bool write);
>>   int drm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
>>   			    u32 handle, u64 *offset);
>>   
>> -- 
>> 2.34.1
>>