diff options
| -rw-r--r-- | src/gallium/auxiliary/pipebuffer/pb_buffer_fenced.c | 81 |
1 files changed, 76 insertions, 5 deletions
diff --git a/src/gallium/auxiliary/pipebuffer/pb_buffer_fenced.c b/src/gallium/auxiliary/pipebuffer/pb_buffer_fenced.c index b1f7d930576..65b6584003a 100644 --- a/src/gallium/auxiliary/pipebuffer/pb_buffer_fenced.c +++ b/src/gallium/auxiliary/pipebuffer/pb_buffer_fenced.c @@ -35,6 +35,7 @@ #include "pipe/p_compiler.h" +#include "pipe/p_error.h" #include "pipe/p_debug.h" #include "pipe/p_winsys.h" #include "pipe/p_thread.h" @@ -54,6 +55,13 @@ */ #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 { @@ -76,6 +84,15 @@ struct fenced_buffer struct pb_buffer *buffer; + /* FIXME: protect access with mutex */ + + /** + * A bitmask of PIPE_BUFFER_USAGE_CPU/GPU_READ/WRITE describing the current + * buffer usage. + */ + unsigned flags; + + unsigned mapcount; struct pipe_fence_handle *fence; struct list_head head; @@ -98,7 +115,9 @@ _fenced_buffer_add(struct fenced_buffer *fenced_buf) struct fenced_buffer_list *fenced_list = fenced_buf->list; assert(fenced_buf->base.base.refcount); + assert(fenced_buf->flags & PIPE_BUFFER_USAGE_GPU_READ_WRITE); assert(fenced_buf->fence); + assert(!fenced_buf->head.prev); assert(!fenced_buf->head.next); LIST_ADDTAIL(&fenced_buf->head, &fenced_list->delayed); @@ -130,6 +149,7 @@ _fenced_buffer_remove(struct fenced_buffer *fenced_buf) assert(fenced_buf->fence); winsys->fence_reference(winsys, &fenced_buf->fence, NULL); + fenced_buf->flags &= ~PIPE_BUFFER_USAGE_GPU_READ_WRITE; assert(fenced_buf->head.prev); assert(fenced_buf->head.next); @@ -186,6 +206,34 @@ _fenced_buffer_list_check_free(struct fenced_buffer_list *fenced_list, } +/** + * Serialize writes, but allow concurrent reads. + */ +static INLINE enum pipe_error +fenced_buffer_serialize(struct fenced_buffer *fenced_buf, unsigned flags) +{ + struct fenced_buffer_list *fenced_list = fenced_buf->list; + struct pipe_winsys *winsys = fenced_list->winsys; + + if(((fenced_buf->flags | flags) & PIPE_BUFFER_USAGE_WRITE) == 0) + return PIPE_OK; + + if(fenced_buf->mapcount) { + /* FIXME */ + debug_warning("attemp to write concurrently to buffer"); + return PIPE_ERROR_RETRY; + } + + if(fenced_buf->fence) { + if(winsys->fence_finish(winsys, fenced_buf->fence, 0) != 0) + return PIPE_ERROR_RETRY; + _fenced_buffer_remove(fenced_buf); + } + + return PIPE_OK; +} + + static void fenced_buffer_destroy(struct pb_buffer *buf) { @@ -223,16 +271,30 @@ static void * fenced_buffer_map(struct pb_buffer *buf, unsigned flags) { - struct fenced_buffer *fenced_buf = fenced_buffer(buf); - return pb_map(fenced_buf->buffer, flags); + struct fenced_buffer *fenced_buf = fenced_buffer(buf); + void *map; + assert((flags & ~PIPE_BUFFER_USAGE_CPU_READ_WRITE) == 0); + + if(fenced_buffer_serialize(fenced_buf, flags) != PIPE_OK) + return NULL; + + map = pb_map(fenced_buf->buffer, flags); + if(map) + ++fenced_buf->mapcount; + fenced_buf->flags |= flags & PIPE_BUFFER_USAGE_CPU_READ_WRITE; + return map; } static void fenced_buffer_unmap(struct pb_buffer *buf) { - struct fenced_buffer *fenced_buf = fenced_buffer(buf); + struct fenced_buffer *fenced_buf = fenced_buffer(buf); + assert(fenced_buf->mapcount); pb_unmap(fenced_buf->buffer); + --fenced_buf->mapcount; + if(!fenced_buf->mapcount) + fenced_buf->flags &= ~PIPE_BUFFER_USAGE_CPU_READ_WRITE; } @@ -288,13 +350,22 @@ buffer_fence(struct pb_buffer *buf, struct fenced_buffer *fenced_buf = fenced_buffer(buf); struct fenced_buffer_list *fenced_list = fenced_buf->list; struct pipe_winsys *winsys = fenced_list->winsys; + /* FIXME: receive this as a parameter */ + unsigned flags = fence ? PIPE_BUFFER_USAGE_GPU_READ_WRITE : 0; + + if(fenced_buffer_serialize(fenced_buf, flags) != PIPE_OK) { + /* FIXME: propagate error */ + (void)0; + } _glthread_LOCK_MUTEX(fenced_list->mutex); if (fenced_buf->fence) _fenced_buffer_remove(fenced_buf); - winsys->fence_reference(winsys, &fenced_buf->fence, fence); - if (fenced_buf->fence) + 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); + } _glthread_UNLOCK_MUTEX(fenced_list->mutex); } |