diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c')
-rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c | 238 |
1 files changed, 72 insertions, 166 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c index 181ce39ef..c48b4fce5 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c @@ -37,6 +37,8 @@ struct amdgpu_sync_entry { struct fence *fence; }; +static struct kmem_cache *amdgpu_sync_slab; + /** * amdgpu_sync_create - zero init sync object * @@ -46,26 +48,22 @@ struct amdgpu_sync_entry { */ void amdgpu_sync_create(struct amdgpu_sync *sync) { - unsigned i; - - for (i = 0; i < AMDGPU_NUM_SYNCS; ++i) - sync->semaphores[i] = NULL; - - for (i = 0; i < AMDGPU_MAX_RINGS; ++i) - sync->sync_to[i] = NULL; - hash_init(sync->fences); sync->last_vm_update = NULL; } +/** + * amdgpu_sync_same_dev - test if fence belong to us + * + * @adev: amdgpu device to use for the test + * @f: fence to test + * + * Test if the fence was issued by us. + */ static bool amdgpu_sync_same_dev(struct amdgpu_device *adev, struct fence *f) { - struct amdgpu_fence *a_fence = to_amdgpu_fence(f); struct amd_sched_fence *s_fence = to_amd_sched_fence(f); - if (a_fence) - return a_fence->ring->adev == adev; - if (s_fence) { struct amdgpu_ring *ring; @@ -76,17 +74,31 @@ static bool amdgpu_sync_same_dev(struct amdgpu_device *adev, struct fence *f) return false; } -static bool amdgpu_sync_test_owner(struct fence *f, void *owner) +/** + * amdgpu_sync_get_owner - extract the owner of a fence + * + * @fence: fence get the owner from + * + * Extract who originally created the fence. + */ +static void *amdgpu_sync_get_owner(struct fence *f) { - struct amdgpu_fence *a_fence = to_amdgpu_fence(f); struct amd_sched_fence *s_fence = to_amd_sched_fence(f); + if (s_fence) - return s_fence->owner == owner; - if (a_fence) - return a_fence->owner == owner; - return false; + return s_fence->owner; + + return AMDGPU_FENCE_OWNER_UNDEFINED; } +/** + * amdgpu_sync_keep_later - Keep the later fence + * + * @keep: existing fence to test + * @fence: new fence + * + * Either keep the existing fence or the new one, depending which one is later. + */ static void amdgpu_sync_keep_later(struct fence **keep, struct fence *fence) { if (*keep && fence_is_later(*keep, fence)) @@ -107,59 +119,39 @@ int amdgpu_sync_fence(struct amdgpu_device *adev, struct amdgpu_sync *sync, struct fence *f) { struct amdgpu_sync_entry *e; - struct amdgpu_fence *fence; if (!f) return 0; if (amdgpu_sync_same_dev(adev, f) && - amdgpu_sync_test_owner(f, AMDGPU_FENCE_OWNER_VM)) + amdgpu_sync_get_owner(f) == AMDGPU_FENCE_OWNER_VM) amdgpu_sync_keep_later(&sync->last_vm_update, f); - fence = to_amdgpu_fence(f); - if (!fence || fence->ring->adev != adev) { - hash_for_each_possible(sync->fences, e, node, f->context) { - if (unlikely(e->fence->context != f->context)) - continue; - - amdgpu_sync_keep_later(&e->fence, f); - return 0; - } - - e = kmalloc(sizeof(struct amdgpu_sync_entry), GFP_KERNEL); - if (!e) - return -ENOMEM; + hash_for_each_possible(sync->fences, e, node, f->context) { + if (unlikely(e->fence->context != f->context)) + continue; - hash_add(sync->fences, &e->node, f->context); - e->fence = fence_get(f); + amdgpu_sync_keep_later(&e->fence, f); return 0; } - amdgpu_sync_keep_later(&sync->sync_to[fence->ring->idx], f); + e = kmem_cache_alloc(amdgpu_sync_slab, GFP_KERNEL); + if (!e) + return -ENOMEM; + hash_add(sync->fences, &e->node, f->context); + e->fence = fence_get(f); return 0; } -static void *amdgpu_sync_get_owner(struct fence *f) -{ - struct amdgpu_fence *a_fence = to_amdgpu_fence(f); - struct amd_sched_fence *s_fence = to_amd_sched_fence(f); - - if (s_fence) - return s_fence->owner; - else if (a_fence) - return a_fence->owner; - return AMDGPU_FENCE_OWNER_UNDEFINED; -} - /** - * amdgpu_sync_resv - use the semaphores to sync to a reservation object + * amdgpu_sync_resv - sync to a reservation object * * @sync: sync object to add fences from reservation object to * @resv: reservation object with embedded fence * @shared: true if we should only sync to the exclusive fence * - * Sync to the fence using the semaphore objects + * Sync to the fence */ int amdgpu_sync_resv(struct amdgpu_device *adev, struct amdgpu_sync *sync, @@ -224,7 +216,7 @@ struct fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync) f = e->fence; hash_del(&e->node); - kfree(e); + kmem_cache_free(amdgpu_sync_slab, e); if (!fence_is_signaled(f)) return f; @@ -247,109 +239,7 @@ int amdgpu_sync_wait(struct amdgpu_sync *sync) hash_del(&e->node); fence_put(e->fence); - kfree(e); - } - - if (amdgpu_enable_semaphores) - return 0; - - for (i = 0; i < AMDGPU_MAX_RINGS; ++i) { - struct fence *fence = sync->sync_to[i]; - if (!fence) - continue; - - r = fence_wait(fence, false); - if (r) - return r; - } - - return 0; -} - -/** - * amdgpu_sync_rings - sync ring to all registered fences - * - * @sync: sync object to use - * @ring: ring that needs sync - * - * Ensure that all registered fences are signaled before letting - * the ring continue. The caller must hold the ring lock. - */ -int amdgpu_sync_rings(struct amdgpu_sync *sync, - struct amdgpu_ring *ring) -{ - struct amdgpu_device *adev = ring->adev; - unsigned count = 0; - int i, r; - - for (i = 0; i < AMDGPU_MAX_RINGS; ++i) { - struct amdgpu_ring *other = adev->rings[i]; - struct amdgpu_semaphore *semaphore; - struct amdgpu_fence *fence; - - if (!sync->sync_to[i]) - continue; - - fence = to_amdgpu_fence(sync->sync_to[i]); - - /* check if we really need to sync */ - if (!amdgpu_enable_scheduler && - !amdgpu_fence_need_sync(fence, ring)) - continue; - - /* prevent GPU deadlocks */ - if (!other->ready) { - dev_err(adev->dev, "Syncing to a disabled ring!"); - return -EINVAL; - } - - if (amdgpu_enable_scheduler || !amdgpu_enable_semaphores) { - r = fence_wait(sync->sync_to[i], true); - if (r) - return r; - continue; - } - - if (count >= AMDGPU_NUM_SYNCS) { - /* not enough room, wait manually */ - r = fence_wait(&fence->base, false); - if (r) - return r; - continue; - } - r = amdgpu_semaphore_create(adev, &semaphore); - if (r) - return r; - - sync->semaphores[count++] = semaphore; - - /* allocate enough space for sync command */ - r = amdgpu_ring_alloc(other, 16); - if (r) - return r; - - /* emit the signal semaphore */ - if (!amdgpu_semaphore_emit_signal(other, semaphore)) { - /* signaling wasn't successful wait manually */ - amdgpu_ring_undo(other); - r = fence_wait(&fence->base, false); - if (r) - return r; - continue; - } - - /* we assume caller has already allocated space on waiters ring */ - if (!amdgpu_semaphore_emit_wait(ring, semaphore)) { - /* waiting wasn't successful wait manually */ - amdgpu_ring_undo(other); - r = fence_wait(&fence->base, false); - if (r) - return r; - continue; - } - - amdgpu_ring_commit(other); - amdgpu_fence_note_sync(fence, ring); + kmem_cache_free(amdgpu_sync_slab, e); } return 0; @@ -358,15 +248,11 @@ int amdgpu_sync_rings(struct amdgpu_sync *sync, /** * amdgpu_sync_free - free the sync object * - * @adev: amdgpu_device pointer * @sync: sync object to use - * @fence: fence to use for the free * - * Free the sync object by freeing all semaphores in it. + * Free the sync object. */ -void amdgpu_sync_free(struct amdgpu_device *adev, - struct amdgpu_sync *sync, - struct fence *fence) +void amdgpu_sync_free(struct amdgpu_sync *sync) { struct amdgpu_sync_entry *e; struct hlist_node *tmp; @@ -375,14 +261,34 @@ void amdgpu_sync_free(struct amdgpu_device *adev, hash_for_each_safe(sync->fences, i, tmp, e, node) { hash_del(&e->node); fence_put(e->fence); - kfree(e); + kmem_cache_free(amdgpu_sync_slab, e); } - for (i = 0; i < AMDGPU_NUM_SYNCS; ++i) - amdgpu_semaphore_free(adev, &sync->semaphores[i], fence); + fence_put(sync->last_vm_update); +} + +/** + * amdgpu_sync_init - init sync object subsystem + * + * Allocate the slab allocator. + */ +int amdgpu_sync_init(void) +{ + amdgpu_sync_slab = kmem_cache_create( + "amdgpu_sync", sizeof(struct amdgpu_sync_entry), 0, + SLAB_HWCACHE_ALIGN, NULL); + if (!amdgpu_sync_slab) + return -ENOMEM; - for (i = 0; i < AMDGPU_MAX_RINGS; ++i) - fence_put(sync->sync_to[i]); + return 0; +} - fence_put(sync->last_vm_update); +/** + * amdgpu_sync_fini - fini sync object subsystem + * + * Free the slab allocator. + */ +void amdgpu_sync_fini(void) +{ + kmem_cache_destroy(amdgpu_sync_slab); } |