* \file
* Implementation of fenced buffers.
*
- * \author José Fonseca <jrfonseca-at-tungstengraphics-dot-com>
+ * \author Jose Fonseca <jrfonseca-at-tungstengraphics-dot-com>
* \author Thomas Hellström <thomas-at-tungstengraphics-dot-com>
*/
#include "pipe/p_compiler.h"
#include "pipe/p_error.h"
#include "pipe/p_debug.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
#include "pipe/p_thread.h"
#include "util/u_memory.h"
#include "util/u_double_list.h"
*/
#define SUPER(__derived) (&(__derived)->base)
-#define PIPE_BUFFER_USAGE_CPU_READ_WRITE \
- ( PIPE_BUFFER_USAGE_CPU_READ | PIPE_BUFFER_USAGE_CPU_WRITE )
-#define PIPE_BUFFER_USAGE_GPU_READ_WRITE \
- ( PIPE_BUFFER_USAGE_GPU_READ | PIPE_BUFFER_USAGE_GPU_WRITE )
-#define PIPE_BUFFER_USAGE_WRITE \
- ( PIPE_BUFFER_USAGE_CPU_WRITE | PIPE_BUFFER_USAGE_GPU_WRITE )
-
struct fenced_buffer_list
{
unsigned flags;
unsigned mapcount;
+ struct pb_validate *vl;
+ unsigned validation_flags;
struct pipe_fence_handle *fence;
struct list_head head;
fenced_buffer(struct pb_buffer *buf)
{
assert(buf);
- assert(buf->vtbl == &fenced_buffer_vtbl);
return (struct fenced_buffer *)buf;
}
struct fenced_buffer *fenced_buf = fenced_buffer(buf);
void *map;
+ assert(flags & PIPE_BUFFER_USAGE_CPU_READ_WRITE);
assert(!(flags & ~PIPE_BUFFER_USAGE_CPU_READ_WRITE));
flags &= PIPE_BUFFER_USAGE_CPU_READ_WRITE;
}
+static enum pipe_error
+fenced_buffer_validate(struct pb_buffer *buf,
+ struct pb_validate *vl,
+ unsigned flags)
+{
+ struct fenced_buffer *fenced_buf = fenced_buffer(buf);
+ enum pipe_error ret;
+
+ if(!vl) {
+ /* invalidate */
+ fenced_buf->vl = NULL;
+ fenced_buf->validation_flags = 0;
+ return PIPE_OK;
+ }
+
+ assert(flags & PIPE_BUFFER_USAGE_GPU_READ_WRITE);
+ assert(!(flags & ~PIPE_BUFFER_USAGE_GPU_READ_WRITE));
+ flags &= PIPE_BUFFER_USAGE_GPU_READ_WRITE;
+
+ /* Buffer cannot be validated in two different lists */
+ if(fenced_buf->vl && fenced_buf->vl != vl)
+ return PIPE_ERROR_RETRY;
+
+ /* Do not validate if buffer is still mapped */
+ if(fenced_buf->flags & PIPE_BUFFER_USAGE_CPU_READ_WRITE) {
+ /* TODO: wait for the thread that mapped the buffer to unmap it */
+ return PIPE_ERROR_RETRY;
+ }
+
+ if(fenced_buf->vl == vl &&
+ (fenced_buf->validation_flags & flags) == flags) {
+ /* Nothing to do -- buffer already validated */
+ return PIPE_OK;
+ }
+
+ /* Final sanity checking */
+ assert(!(fenced_buf->flags & PIPE_BUFFER_USAGE_CPU_READ_WRITE));
+ assert(!fenced_buf->mapcount);
+
+ ret = pb_validate(fenced_buf->buffer, vl, flags);
+ if (ret != PIPE_OK)
+ return ret;
+
+ fenced_buf->vl = vl;
+ fenced_buf->validation_flags |= flags;
+
+ return PIPE_OK;
+}
+
+
+static void
+fenced_buffer_fence(struct pb_buffer *buf,
+ struct pipe_fence_handle *fence)
+{
+ struct fenced_buffer *fenced_buf;
+ struct fenced_buffer_list *fenced_list;
+ struct pipe_winsys *winsys;
+
+ fenced_buf = fenced_buffer(buf);
+ fenced_list = fenced_buf->list;
+ winsys = fenced_list->winsys;
+
+ if(fence == fenced_buf->fence) {
+ /* Nothing to do */
+ return;
+ }
+
+ assert(fenced_buf->vl);
+ assert(fenced_buf->validation_flags);
+
+ pipe_mutex_lock(fenced_list->mutex);
+ if (fenced_buf->fence)
+ _fenced_buffer_remove(fenced_list, fenced_buf);
+ if (fence) {
+ winsys->fence_reference(winsys, &fenced_buf->fence, fence);
+ fenced_buf->flags |= fenced_buf->validation_flags;
+ _fenced_buffer_add(fenced_buf);
+ }
+ pipe_mutex_unlock(fenced_list->mutex);
+
+ pb_fence(fenced_buf->buffer, fence);
+
+ fenced_buf->vl = NULL;
+ fenced_buf->validation_flags = 0;
+}
+
+
static void
fenced_buffer_get_base_buffer(struct pb_buffer *buf,
struct pb_buffer **base_buf,
}
-const struct pb_vtbl
+static const struct pb_vtbl
fenced_buffer_vtbl = {
fenced_buffer_destroy,
fenced_buffer_map,
fenced_buffer_unmap,
+ fenced_buffer_validate,
+ fenced_buffer_fence,
fenced_buffer_get_base_buffer
};
}
-void
-buffer_fence(struct pb_buffer *buf,
- struct pipe_fence_handle *fence)
-{
- struct fenced_buffer *fenced_buf;
- struct fenced_buffer_list *fenced_list;
- struct pipe_winsys *winsys;
- /* FIXME: receive this as a parameter */
- unsigned flags = fence ? PIPE_BUFFER_USAGE_GPU_READ_WRITE : 0;
-
- /* This is a public function, so be extra cautious with the buffer passed,
- * as happens frequently to receive null buffers, or pointer to buffers
- * other than fenced buffers. */
- assert(buf);
- if(!buf)
- return;
- assert(buf->vtbl == &fenced_buffer_vtbl);
- if(buf->vtbl != &fenced_buffer_vtbl)
- return;
-
- fenced_buf = fenced_buffer(buf);
- fenced_list = fenced_buf->list;
- winsys = fenced_list->winsys;
-
- if(!fence || fence == fenced_buf->fence) {
- /* Handle the same fence case specially, not only because it is a fast
- * path, but mostly to avoid serializing two writes with the same fence,
- * as that would bring the hardware down to synchronous operation without
- * any benefit.
- */
- fenced_buf->flags |= flags & PIPE_BUFFER_USAGE_GPU_READ_WRITE;
- return;
- }
-
- pipe_mutex_lock(fenced_list->mutex);
- if (fenced_buf->fence)
- _fenced_buffer_remove(fenced_list, fenced_buf);
- if (fence) {
- winsys->fence_reference(winsys, &fenced_buf->fence, fence);
- fenced_buf->flags |= flags & PIPE_BUFFER_USAGE_GPU_READ_WRITE;
- _fenced_buffer_add(fenced_buf);
- }
- pipe_mutex_unlock(fenced_list->mutex);
-}
-
-
struct fenced_buffer_list *
fenced_buffer_list_create(struct pipe_winsys *winsys)
{
projects / mesa.git / blobdiff