diff options
Diffstat (limited to 'src/gallium/winsys/drm/nouveau/common/nouveau_fence.c')
| -rw-r--r-- | src/gallium/winsys/drm/nouveau/common/nouveau_fence.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/src/gallium/winsys/drm/nouveau/common/nouveau_fence.c b/src/gallium/winsys/drm/nouveau/common/nouveau_fence.c new file mode 100644 index 0000000000..e7b0b4ff07 --- /dev/null +++ b/src/gallium/winsys/drm/nouveau/common/nouveau_fence.c @@ -0,0 +1,214 @@ +/* + * Copyright 2007 Nouveau Project + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF + * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <stdlib.h> +#include <errno.h> +#include <assert.h> + +#include "nouveau_drmif.h" +#include "nouveau_dma.h" +#include "nouveau_local.h" + +static void +nouveau_fence_del_unsignalled(struct nouveau_fence *fence) +{ + struct nouveau_channel_priv *nvchan = nouveau_channel(fence->channel); + struct nouveau_fence *le; + + if (nvchan->fence_head == fence) { + nvchan->fence_head = nouveau_fence(fence)->next; + if (nvchan->fence_head == NULL) + nvchan->fence_tail = NULL; + return; + } + + le = nvchan->fence_head; + while (le && nouveau_fence(le)->next != fence) + le = nouveau_fence(le)->next; + assert(le && nouveau_fence(le)->next == fence); + nouveau_fence(le)->next = nouveau_fence(fence)->next; + if (nvchan->fence_tail == fence) + nvchan->fence_tail = le; +} + +static void +nouveau_fence_del(struct nouveau_fence **fence) +{ + struct nouveau_fence_priv *nvfence; + + if (!fence || !*fence) + return; + nvfence = nouveau_fence(*fence); + *fence = NULL; + + if (--nvfence->refcount) + return; + + if (nvfence->emitted && !nvfence->signalled) { + if (nvfence->signal_cb) { + nvfence->refcount++; + nouveau_fence_wait((void *)&nvfence); + return; + } + + nouveau_fence_del_unsignalled(&nvfence->base); + } + free(nvfence); +} + +int +nouveau_fence_new(struct nouveau_channel *chan, struct nouveau_fence **fence) +{ + struct nouveau_fence_priv *nvfence; + + if (!chan || !fence || *fence) + return -EINVAL; + + nvfence = calloc(1, sizeof(struct nouveau_fence_priv)); + if (!nvfence) + return -ENOMEM; + nvfence->base.channel = chan; + nvfence->refcount = 1; + + *fence = &nvfence->base; + return 0; +} + +int +nouveau_fence_ref(struct nouveau_fence *ref, struct nouveau_fence **fence) +{ + struct nouveau_fence_priv *nvfence; + + if (!fence) + return -EINVAL; + + if (*fence) { + nouveau_fence_del(fence); + *fence = NULL; + } + + if (ref) { + nvfence = nouveau_fence(ref); + nvfence->refcount++; + *fence = &nvfence->base; + } + + return 0; +} + +int +nouveau_fence_signal_cb(struct nouveau_fence *fence, void (*func)(void *), + void *priv) +{ + struct nouveau_fence_priv *nvfence = nouveau_fence(fence); + struct nouveau_fence_cb *cb; + + if (!nvfence || !func) + return -EINVAL; + + cb = malloc(sizeof(struct nouveau_fence_cb)); + if (!cb) + return -ENOMEM; + + cb->func = func; + cb->priv = priv; + cb->next = nvfence->signal_cb; + nvfence->signal_cb = cb; + return 0; +} + +void +nouveau_fence_emit(struct nouveau_fence *fence) +{ + struct nouveau_channel_priv *nvchan = nouveau_channel(fence->channel); + struct nouveau_fence_priv *nvfence = nouveau_fence(fence); + + nvfence->emitted = 1; + nvfence->sequence = ++nvchan->fence_sequence; + if (nvfence->sequence == 0xffffffff) + NOUVEAU_ERR("AII wrap unhandled\n"); + + /*XXX: assumes subc 0 is populated */ + RING_SPACE_CH(fence->channel, 2); + OUT_RING_CH (fence->channel, 0x00040050); + OUT_RING_CH (fence->channel, nvfence->sequence); + + if (nvchan->fence_tail) { + nouveau_fence(nvchan->fence_tail)->next = fence; + } else { + nvchan->fence_head = fence; + } + nvchan->fence_tail = fence; +} + +void +nouveau_fence_flush(struct nouveau_channel *chan) +{ + struct nouveau_channel_priv *nvchan = nouveau_channel(chan); + uint32_t sequence = *nvchan->ref_cnt; + + while (nvchan->fence_head) { + struct nouveau_fence_priv *nvfence; + + nvfence = nouveau_fence(nvchan->fence_head); + if (nvfence->sequence > sequence) + break; + nouveau_fence_del_unsignalled(&nvfence->base); + nvfence->signalled = 1; + + if (nvfence->signal_cb) { + struct nouveau_fence *fence = NULL; + + nouveau_fence_ref(&nvfence->base, &fence); + + while (nvfence->signal_cb) { + struct nouveau_fence_cb *cb; + + cb = nvfence->signal_cb; + nvfence->signal_cb = cb->next; + cb->func(cb->priv); + free(cb); + } + + nouveau_fence_ref(NULL, &fence); + } + } +} + +int +nouveau_fence_wait(struct nouveau_fence **fence) +{ + struct nouveau_fence_priv *nvfence; + + if (!fence || !*fence) + return -EINVAL; + nvfence = nouveau_fence(*fence); + + if (nvfence->emitted) { + while (!nvfence->signalled) + nouveau_fence_flush(nvfence->base.channel); + } + nouveau_fence_ref(NULL, fence); + + return 0; +} + |