From: Christian König Date: Tue, 3 Nov 2015 11:21:57 +0000 (+0100) Subject: drm/amdgpu: group together common fence implementation X-Git-Tag: v4.9.8~3206^2~9^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a95e264254dca5b6bfb331d5902930d0787bd7e1;p=platform%2Fkernel%2Flinux-rpi3.git drm/amdgpu: group together common fence implementation And also add some missing function documentation. No functional change. Signed-off-by: Christian König Reviewed-by: Chunming Zhou Reviewed-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c index 2c485a2..257d722 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c @@ -137,42 +137,6 @@ int amdgpu_fence_emit(struct amdgpu_ring *ring, void *owner, } /** - * amdgpu_fence_check_signaled - callback from fence_queue - * - * this function is called with fence_queue lock held, which is also used - * for the fence locking itself, so unlocked variants are used for - * fence_signal, and remove_wait_queue. - */ -static int amdgpu_fence_check_signaled(wait_queue_t *wait, unsigned mode, int flags, void *key) -{ - struct amdgpu_fence *fence; - struct amdgpu_device *adev; - u64 seq; - int ret; - - fence = container_of(wait, struct amdgpu_fence, fence_wake); - adev = fence->ring->adev; - - /* - * We cannot use amdgpu_fence_process here because we're already - * in the waitqueue, in a call from wake_up_all. - */ - seq = atomic64_read(&fence->ring->fence_drv.last_seq); - if (seq >= fence->seq) { - ret = fence_signal_locked(&fence->base); - if (!ret) - FENCE_TRACE(&fence->base, "signaled from irq context\n"); - else - FENCE_TRACE(&fence->base, "was already signaled\n"); - - __remove_wait_queue(&fence->ring->fence_drv.fence_queue, &fence->fence_wake); - fence_put(&fence->base); - } else - FENCE_TRACE(&fence->base, "pending\n"); - return 0; -} - -/** * amdgpu_fence_activity - check for fence activity * * @ring: pointer to struct amdgpu_ring @@ -305,48 +269,6 @@ static bool amdgpu_fence_seq_signaled(struct amdgpu_ring *ring, u64 seq) return false; } -static bool amdgpu_fence_is_signaled(struct fence *f) -{ - struct amdgpu_fence *fence = to_amdgpu_fence(f); - struct amdgpu_ring *ring = fence->ring; - - if (atomic64_read(&ring->fence_drv.last_seq) >= fence->seq) - return true; - - amdgpu_fence_process(ring); - - if (atomic64_read(&ring->fence_drv.last_seq) >= fence->seq) - return true; - - return false; -} - -/** - * amdgpu_fence_enable_signaling - enable signalling on fence - * @fence: fence - * - * This function is called with fence_queue lock held, and adds a callback - * to fence_queue that checks if this fence is signaled, and if so it - * signals the fence and removes itself. - */ -static bool amdgpu_fence_enable_signaling(struct fence *f) -{ - struct amdgpu_fence *fence = to_amdgpu_fence(f); - struct amdgpu_ring *ring = fence->ring; - - if (atomic64_read(&ring->fence_drv.last_seq) >= fence->seq) - return false; - - fence->fence_wake.flags = 0; - fence->fence_wake.private = NULL; - fence->fence_wake.func = amdgpu_fence_check_signaled; - __add_wait_queue(&ring->fence_drv.fence_queue, &fence->fence_wake); - fence_get(f); - amdgpu_fence_schedule_check(ring); - FENCE_TRACE(&fence->base, "armed on ring %i!\n", ring->idx); - return true; -} - /* * amdgpu_ring_wait_seq_timeout - wait for seq of the specific ring to signal * @ring: ring to wait on for the seq number @@ -733,6 +655,115 @@ void amdgpu_fence_driver_force_completion(struct amdgpu_device *adev) } } +/* + * Common fence implementation + */ + +static const char *amdgpu_fence_get_driver_name(struct fence *fence) +{ + return "amdgpu"; +} + +static const char *amdgpu_fence_get_timeline_name(struct fence *f) +{ + struct amdgpu_fence *fence = to_amdgpu_fence(f); + return (const char *)fence->ring->name; +} + +/** + * amdgpu_fence_is_signaled - test if fence is signaled + * + * @f: fence to test + * + * Test the fence sequence number if it is already signaled. If it isn't + * signaled start fence processing. Returns True if the fence is signaled. + */ +static bool amdgpu_fence_is_signaled(struct fence *f) +{ + struct amdgpu_fence *fence = to_amdgpu_fence(f); + struct amdgpu_ring *ring = fence->ring; + + if (atomic64_read(&ring->fence_drv.last_seq) >= fence->seq) + return true; + + amdgpu_fence_process(ring); + + if (atomic64_read(&ring->fence_drv.last_seq) >= fence->seq) + return true; + + return false; +} + +/** + * amdgpu_fence_check_signaled - callback from fence_queue + * + * this function is called with fence_queue lock held, which is also used + * for the fence locking itself, so unlocked variants are used for + * fence_signal, and remove_wait_queue. + */ +static int amdgpu_fence_check_signaled(wait_queue_t *wait, unsigned mode, int flags, void *key) +{ + struct amdgpu_fence *fence; + struct amdgpu_device *adev; + u64 seq; + int ret; + + fence = container_of(wait, struct amdgpu_fence, fence_wake); + adev = fence->ring->adev; + + /* + * We cannot use amdgpu_fence_process here because we're already + * in the waitqueue, in a call from wake_up_all. + */ + seq = atomic64_read(&fence->ring->fence_drv.last_seq); + if (seq >= fence->seq) { + ret = fence_signal_locked(&fence->base); + if (!ret) + FENCE_TRACE(&fence->base, "signaled from irq context\n"); + else + FENCE_TRACE(&fence->base, "was already signaled\n"); + + __remove_wait_queue(&fence->ring->fence_drv.fence_queue, &fence->fence_wake); + fence_put(&fence->base); + } else + FENCE_TRACE(&fence->base, "pending\n"); + return 0; +} + +/** + * amdgpu_fence_enable_signaling - enable signalling on fence + * @fence: fence + * + * This function is called with fence_queue lock held, and adds a callback + * to fence_queue that checks if this fence is signaled, and if so it + * signals the fence and removes itself. + */ +static bool amdgpu_fence_enable_signaling(struct fence *f) +{ + struct amdgpu_fence *fence = to_amdgpu_fence(f); + struct amdgpu_ring *ring = fence->ring; + + if (atomic64_read(&ring->fence_drv.last_seq) >= fence->seq) + return false; + + fence->fence_wake.flags = 0; + fence->fence_wake.private = NULL; + fence->fence_wake.func = amdgpu_fence_check_signaled; + __add_wait_queue(&ring->fence_drv.fence_queue, &fence->fence_wake); + fence_get(f); + amdgpu_fence_schedule_check(ring); + FENCE_TRACE(&fence->base, "armed on ring %i!\n", ring->idx); + return true; +} + +const struct fence_ops amdgpu_fence_ops = { + .get_driver_name = amdgpu_fence_get_driver_name, + .get_timeline_name = amdgpu_fence_get_timeline_name, + .enable_signaling = amdgpu_fence_enable_signaling, + .signaled = amdgpu_fence_is_signaled, + .wait = fence_default_wait, + .release = NULL, +}; /* * Fence debugfs @@ -783,22 +814,3 @@ int amdgpu_debugfs_fence_init(struct amdgpu_device *adev) #endif } -static const char *amdgpu_fence_get_driver_name(struct fence *fence) -{ - return "amdgpu"; -} - -static const char *amdgpu_fence_get_timeline_name(struct fence *f) -{ - struct amdgpu_fence *fence = to_amdgpu_fence(f); - return (const char *)fence->ring->name; -} - -const struct fence_ops amdgpu_fence_ops = { - .get_driver_name = amdgpu_fence_get_driver_name, - .get_timeline_name = amdgpu_fence_get_timeline_name, - .enable_signaling = amdgpu_fence_enable_signaling, - .signaled = amdgpu_fence_is_signaled, - .wait = fence_default_wait, - .release = NULL, -};