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drm/amdgpu: add kmem cache for amdgpu fence

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Change-Id: I5ad8dd156ccf27a6f18004aa0a215a0925b6e67b
Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
This commit is contained in:
Chunming Zhou 2015-11-05 11:28:28 +08:00 committed by Alex Deucher
parent 451f698bca
commit b49c84a576
1 changed files with 20 additions and 2 deletions
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22
drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
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@ -47,6 +47,9 @@
* that the the relevant GPU caches have been flushed.
*/
static struct kmem_cache *amdgpu_fence_slab;
static atomic_t amdgpu_fence_slab_ref = ATOMIC_INIT(0);
/**
* amdgpu_fence_write - write a fence value
*
@ -100,7 +103,7 @@ int amdgpu_fence_emit(struct amdgpu_ring *ring, void *owner,
struct amdgpu_device *adev = ring->adev;
/* we are protected by the ring emission mutex */
*fence = kmalloc(sizeof(struct amdgpu_fence), GFP_KERNEL);
*fence = kmem_cache_alloc(amdgpu_fence_slab, GFP_KERNEL);
if ((*fence) == NULL) {
return -ENOMEM;
}
@ -522,6 +525,13 @@ int amdgpu_fence_driver_init_ring(struct amdgpu_ring *ring)
*/
int amdgpu_fence_driver_init(struct amdgpu_device *adev)
{
if (atomic_inc_return(&amdgpu_fence_slab_ref) == 1) {
amdgpu_fence_slab = kmem_cache_create(
"amdgpu_fence", sizeof(struct amdgpu_fence), 0,
SLAB_HWCACHE_ALIGN, NULL);
if (!amdgpu_fence_slab)
return -ENOMEM;
}
if (amdgpu_debugfs_fence_init(adev))
dev_err(adev->dev, "fence debugfs file creation failed\n");
@ -540,6 +550,8 @@ void amdgpu_fence_driver_fini(struct amdgpu_device *adev)
{
int i, r;
if (atomic_dec_and_test(&amdgpu_fence_slab_ref))
kmem_cache_destroy(amdgpu_fence_slab);
mutex_lock(&adev->ring_lock);
for (i = 0; i < AMDGPU_MAX_RINGS; i++) {
struct amdgpu_ring *ring = adev->rings[i];
@ -745,13 +757,19 @@ static bool amdgpu_fence_enable_signaling(struct fence *f)
return true;
}
static void amdgpu_fence_release(struct fence *f)
{
struct amdgpu_fence *fence = to_amdgpu_fence(f);
kmem_cache_free(amdgpu_fence_slab, fence);
}
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,
.release = amdgpu_fence_release,
};
/*