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Diffstat (limited to 'src/gallium/winsys/dri/nouveau/nouveau_fence.c')
-rw-r--r--src/gallium/winsys/dri/nouveau/nouveau_fence.c214
1 files changed, 214 insertions, 0 deletions
diff --git a/src/gallium/winsys/dri/nouveau/nouveau_fence.c b/src/gallium/winsys/dri/nouveau/nouveau_fence.c
new file mode 100644
index 0000000000..e7b0b4ff07
--- /dev/null
+++ b/src/gallium/winsys/dri/nouveau/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;
+}
+