diff options
Diffstat (limited to 'src/gallium/drivers/svga')
| -rw-r--r-- | src/gallium/drivers/svga/svga_resource_buffer.c | 105 | ||||
| -rw-r--r-- | src/gallium/drivers/svga/svga_resource_buffer_upload.c | 23 | ||||
| -rw-r--r-- | src/gallium/drivers/svga/svga_resource_buffer_upload.h | 4 |
3 files changed, 113 insertions, 19 deletions
diff --git a/src/gallium/drivers/svga/svga_resource_buffer.c b/src/gallium/drivers/svga/svga_resource_buffer.c index b0e6d96b73..ae854a8054 100644 --- a/src/gallium/drivers/svga/svga_resource_buffer.c +++ b/src/gallium/drivers/svga/svga_resource_buffer.c @@ -51,18 +51,105 @@ svga_buffer_needs_hw_storage(unsigned usage) } +/** + * Map a range of a buffer. + * + * Unlike texture DMAs (which are written immediately to the command buffer and + * therefore inherently serialized with other context operations), for buffers + * we try to coalesce multiple range mappings (i.e, multiple calls to this + * function) into a single DMA command, for better efficiency in command + * processing. This means we need to exercise extra care here to ensure that + * the end result is exactly the same as if one DMA was used for every mapped + * range. + */ static void * -svga_buffer_map_range( struct pipe_screen *screen, +svga_buffer_map_range( struct pipe_context *pipe, struct pipe_resource *buf, unsigned offset, unsigned length, unsigned usage ) { - struct svga_screen *ss = svga_screen(screen); + struct svga_context *svga = svga_context(pipe); + struct svga_screen *ss = svga_screen(pipe->screen); struct svga_winsys_screen *sws = ss->sws; struct svga_buffer *sbuf = svga_buffer( buf ); void *map; + if (usage & PIPE_TRANSFER_WRITE) { + if (usage & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE) { + /* + * Finish writing any pending DMA commands, and tell the host to discard + * the buffer contents on the next DMA operation. + */ + + if (sbuf->dma.pending) { + svga_buffer_upload_flush(svga, sbuf); + + /* + * Instead of flushing the context command buffer, simply discard + * the current hwbuf, and start a new one. + */ + + svga_buffer_destroy_hw_storage(ss, sbuf); + } + + sbuf->map.num_ranges = 0; + sbuf->dma.flags.discard = TRUE; + } + + if (usage & PIPE_TRANSFER_UNSYNCHRONIZED) { + if (!sbuf->map.num_ranges) { + /* + * No pending ranges to upload so far, so we can tell the host to + * not synchronize on the next DMA command. + */ + + sbuf->dma.flags.unsynchronized = TRUE; + } + } else { + /* + * Synchronizing, so finish writing any pending DMA command, and + * ensure the next DMA will be done in order. + */ + + if (sbuf->dma.pending) { + svga_buffer_upload_flush(svga, sbuf); + + if (sbuf->hwbuf) { + /* + * We have a pending DMA upload from a hardware buffer, therefore + * we need to ensure that the host finishes processing that DMA + * command before the state tracker can start overwriting the + * hardware buffer. + * + * XXX: This could be avoided by tying the hardware buffer to + * the transfer (just as done with textures), which would allow + * overlapping DMAs commands to be queued on the same context + * buffer. However, due to the likelihood of software vertex + * processing, it is more convenient to hold on to the hardware + * buffer, allowing to quickly access the contents from the CPU + * without having to do a DMA download from the host. + */ + + if (usage & PIPE_TRANSFER_DONTBLOCK) { + /* + * Flushing the command buffer here will most likely cause + * the map of the hwbuf below to block, so preemptively + * return NULL here if DONTBLOCK is set to prevent unnecessary + * command buffer flushes. + */ + + return NULL; + } + + svga_context_flush(svga, NULL); + } + } + + sbuf->dma.flags.unsynchronized = FALSE; + } + } + if (!sbuf->swbuf && !sbuf->hwbuf) { if (svga_buffer_create_hw_storage(ss, sbuf) != PIPE_OK) { /* @@ -108,12 +195,12 @@ svga_buffer_map_range( struct pipe_screen *screen, static void -svga_buffer_flush_mapped_range( struct pipe_screen *screen, +svga_buffer_flush_mapped_range( struct pipe_context *pipe, struct pipe_resource *buf, unsigned offset, unsigned length) { struct svga_buffer *sbuf = svga_buffer( buf ); - struct svga_screen *ss = svga_screen(screen); + struct svga_screen *ss = svga_screen(pipe->screen); pipe_mutex_lock(ss->swc_mutex); assert(sbuf->map.writing); @@ -125,10 +212,10 @@ svga_buffer_flush_mapped_range( struct pipe_screen *screen, } static void -svga_buffer_unmap( struct pipe_screen *screen, +svga_buffer_unmap( struct pipe_context *pipe, struct pipe_resource *buf) { - struct svga_screen *ss = svga_screen(screen); + struct svga_screen *ss = svga_screen(pipe->screen); struct svga_winsys_screen *sws = ss->sws; struct svga_buffer *sbuf = svga_buffer( buf ); @@ -192,7 +279,7 @@ static void * svga_buffer_transfer_map( struct pipe_context *pipe, struct pipe_transfer *transfer ) { - uint8_t *map = svga_buffer_map_range( pipe->screen, + uint8_t *map = svga_buffer_map_range( pipe, transfer->resource, transfer->box.x, transfer->box.width, @@ -215,7 +302,7 @@ static void svga_buffer_transfer_flush_region( struct pipe_context *pipe, { assert(box->x + box->width <= transfer->box.width); - svga_buffer_flush_mapped_range(pipe->screen, + svga_buffer_flush_mapped_range(pipe, transfer->resource, transfer->box.x + box->x, box->width); @@ -224,7 +311,7 @@ static void svga_buffer_transfer_flush_region( struct pipe_context *pipe, static void svga_buffer_transfer_unmap( struct pipe_context *pipe, struct pipe_transfer *transfer ) { - svga_buffer_unmap(pipe->screen, + svga_buffer_unmap(pipe, transfer->resource); } diff --git a/src/gallium/drivers/svga/svga_resource_buffer_upload.c b/src/gallium/drivers/svga/svga_resource_buffer_upload.c index b7d54605e6..0bfa8a14a6 100644 --- a/src/gallium/drivers/svga/svga_resource_buffer_upload.c +++ b/src/gallium/drivers/svga/svga_resource_buffer_upload.c @@ -252,7 +252,7 @@ svga_buffer_upload_command(struct svga_context *svga, * Patch up the upload DMA command reserved by svga_buffer_upload_command * with the final ranges. */ -static void +void svga_buffer_upload_flush(struct svga_context *svga, struct svga_buffer *sbuf) { @@ -260,6 +260,10 @@ svga_buffer_upload_flush(struct svga_context *svga, unsigned i; struct pipe_resource *dummy; + if (!sbuf->dma.pending) { + return; + } + assert(sbuf->handle); assert(sbuf->hwbuf); assert(sbuf->map.num_ranges); @@ -296,6 +300,8 @@ svga_buffer_upload_flush(struct svga_context *svga, sbuf->head.next = sbuf->head.prev = NULL; #endif sbuf->dma.pending = FALSE; + sbuf->dma.flags.discard = FALSE; + sbuf->dma.flags.unsynchronized = FALSE; sbuf->dma.svga = NULL; sbuf->dma.boxes = NULL; @@ -306,7 +312,6 @@ svga_buffer_upload_flush(struct svga_context *svga, } - /** * Note a dirty range. * @@ -337,12 +342,6 @@ svga_buffer_add_range(struct svga_buffer *sbuf, /* * Try to grow one of the ranges. - * - * Note that it is not this function task to care about overlapping ranges, - * as the GMR was already given so it is too late to do anything. Situations - * where overlapping ranges may pose a problem should be detected via - * pipe_context::is_resource_referenced and the context that refers to the - * buffer should be flushed. */ for(i = 0; i < sbuf->map.num_ranges; ++i) { @@ -357,6 +356,11 @@ svga_buffer_add_range(struct svga_buffer *sbuf, if (dist <= 0) { /* * Ranges are contiguous or overlapping -- extend this one and return. + * + * Note that it is not this function's task to prevent overlapping + * ranges, as the GMR was already given so it is too late to do + * anything. If the ranges overlap here it must surely be because + * PIPE_TRANSFER_UNSYNCHRONIZED was set. */ sbuf->map.ranges[i].start = MIN2(sbuf->map.ranges[i].start, start); @@ -380,8 +384,7 @@ svga_buffer_add_range(struct svga_buffer *sbuf, * pending DMA upload and start clean. */ - if(sbuf->dma.pending) - svga_buffer_upload_flush(sbuf->dma.svga, sbuf); + svga_buffer_upload_flush(sbuf->dma.svga, sbuf); assert(!sbuf->dma.pending); assert(!sbuf->dma.svga); diff --git a/src/gallium/drivers/svga/svga_resource_buffer_upload.h b/src/gallium/drivers/svga/svga_resource_buffer_upload.h index 11df306526..13d8f3e299 100644 --- a/src/gallium/drivers/svga/svga_resource_buffer_upload.h +++ b/src/gallium/drivers/svga/svga_resource_buffer_upload.h @@ -28,6 +28,10 @@ void +svga_buffer_upload_flush(struct svga_context *svga, + struct svga_buffer *sbuf); + +void svga_buffer_add_range(struct svga_buffer *sbuf, unsigned start, unsigned end); |