diff options
Diffstat (limited to 'src/gallium/drivers/svga/svga_screen_buffer.c')
| -rw-r--r-- | src/gallium/drivers/svga/svga_screen_buffer.c | 825 |
1 files changed, 825 insertions, 0 deletions
diff --git a/src/gallium/drivers/svga/svga_screen_buffer.c b/src/gallium/drivers/svga/svga_screen_buffer.c new file mode 100644 index 0000000000..58a1aba464 --- /dev/null +++ b/src/gallium/drivers/svga/svga_screen_buffer.c @@ -0,0 +1,825 @@ +/********************************************************** + * Copyright 2008-2009 VMware, Inc. All rights reserved. + * + * 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 OR COPYRIGHT HOLDERS + * 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 "svga_cmd.h" + +#include "pipe/p_state.h" +#include "pipe/p_defines.h" +#include "pipe/p_inlines.h" +#include "pipe/p_thread.h" +#include "util/u_math.h" +#include "util/u_memory.h" + +#include "svga_context.h" +#include "svga_screen.h" +#include "svga_screen_buffer.h" +#include "svga_winsys.h" +#include "svga_debug.h" + + +/** + * Vertex and index buffers have to be treated slightly differently from + * regular guest memory regions because the SVGA device sees them as + * surfaces, and the state tracker can create/destroy without the pipe + * driver, therefore we must do the uploads from the vws. + */ +static INLINE boolean +svga_buffer_needs_hw_storage(unsigned usage) +{ + return usage & (PIPE_BUFFER_USAGE_VERTEX | PIPE_BUFFER_USAGE_INDEX); +} + + +static INLINE enum pipe_error +svga_buffer_create_host_surface(struct svga_screen *ss, + struct svga_buffer *sbuf) +{ + if(!sbuf->handle) { + sbuf->key.flags = 0; + + sbuf->key.format = SVGA3D_BUFFER; + if(sbuf->base.usage & PIPE_BUFFER_USAGE_VERTEX) + sbuf->key.flags |= SVGA3D_SURFACE_HINT_VERTEXBUFFER; + if(sbuf->base.usage & PIPE_BUFFER_USAGE_INDEX) + sbuf->key.flags |= SVGA3D_SURFACE_HINT_INDEXBUFFER; + + sbuf->key.size.width = sbuf->base.size; + sbuf->key.size.height = 1; + sbuf->key.size.depth = 1; + + sbuf->key.numFaces = 1; + sbuf->key.numMipLevels = 1; + sbuf->key.cachable = 1; + + SVGA_DBG(DEBUG_DMA, "surface_create for buffer sz %d\n", sbuf->base.size); + + sbuf->handle = svga_screen_surface_create(ss, &sbuf->key); + if(!sbuf->handle) + return PIPE_ERROR_OUT_OF_MEMORY; + + /* Always set the discard flag on the first time the buffer is written + * as svga_screen_surface_create might have passed a recycled host + * buffer. + */ + sbuf->hw.flags.discard = TRUE; + + SVGA_DBG(DEBUG_DMA, " --> got sid %p sz %d (buffer)\n", sbuf->handle, sbuf->base.size); + } + + return PIPE_OK; +} + + +static INLINE void +svga_buffer_destroy_host_surface(struct svga_screen *ss, + struct svga_buffer *sbuf) +{ + if(sbuf->handle) { + SVGA_DBG(DEBUG_DMA, " ungrab sid %p sz %d\n", sbuf->handle, sbuf->base.size); + svga_screen_surface_destroy(ss, &sbuf->key, &sbuf->handle); + } +} + + +static INLINE void +svga_buffer_destroy_hw_storage(struct svga_screen *ss, struct svga_buffer *sbuf) +{ + struct svga_winsys_screen *sws = ss->sws; + + assert(!sbuf->map.count); + assert(sbuf->hw.buf); + if(sbuf->hw.buf) { + sws->buffer_destroy(sws, sbuf->hw.buf); + sbuf->hw.buf = NULL; + assert(sbuf->head.prev && sbuf->head.next); + LIST_DEL(&sbuf->head); +#ifdef DEBUG + sbuf->head.next = sbuf->head.prev = NULL; +#endif + } +} + +static INLINE enum pipe_error +svga_buffer_backup(struct svga_screen *ss, struct svga_buffer *sbuf) +{ + if (sbuf->hw.buf && sbuf->hw.num_ranges) { + void *src; + + if (!sbuf->swbuf) + sbuf->swbuf = align_malloc(sbuf->base.size, sbuf->base.alignment); + if (!sbuf->swbuf) + return PIPE_ERROR_OUT_OF_MEMORY; + + src = ss->sws->buffer_map(ss->sws, sbuf->hw.buf, + PIPE_BUFFER_USAGE_CPU_READ); + if (!src) + return PIPE_ERROR; + + memcpy(sbuf->swbuf, src, sbuf->base.size); + ss->sws->buffer_unmap(ss->sws, sbuf->hw.buf); + } + + return PIPE_OK; +} + +/** + * Try to make GMR space available by freeing the hardware storage of + * unmapped + */ +boolean +svga_buffer_free_cached_hw_storage(struct svga_screen *ss) +{ + struct list_head *curr; + struct svga_buffer *sbuf; + enum pipe_error ret = PIPE_OK; + + curr = ss->cached_buffers.prev; + + /* free the least recently used buffer's hw storage which is not mapped */ + do { + if(curr == &ss->cached_buffers) + return FALSE; + + sbuf = LIST_ENTRY(struct svga_buffer, curr, head); + + curr = curr->prev; + if (sbuf->map.count == 0) + ret = svga_buffer_backup(ss, sbuf); + + } while(sbuf->map.count != 0 || ret != PIPE_OK); + + svga_buffer_destroy_hw_storage(ss, sbuf); + + return TRUE; +} + +struct svga_winsys_buffer * +svga_winsys_buffer_create( struct svga_screen *ss, + unsigned alignment, + unsigned usage, + unsigned size ) +{ + struct svga_winsys_screen *sws = ss->sws; + struct svga_winsys_buffer *buf; + + /* Just try */ + buf = sws->buffer_create(sws, alignment, usage, size); + if(!buf) { + + SVGA_DBG(DEBUG_DMA|DEBUG_PERF, "flushing screen to find %d bytes GMR\n", + size); + + /* Try flushing all pending DMAs */ + svga_screen_flush(ss, NULL); + buf = sws->buffer_create(sws, alignment, usage, size); + + SVGA_DBG(DEBUG_DMA|DEBUG_PERF, "evicting buffers to find %d bytes GMR\n", + size); + + /* Try evicing all buffer storage */ + while(!buf && svga_buffer_free_cached_hw_storage(ss)) + buf = sws->buffer_create(sws, alignment, usage, size); + } + + return buf; +} + + +/** + * Allocate DMA'ble storage for the buffer. + * + * Called before mapping a buffer. + */ +static INLINE enum pipe_error +svga_buffer_create_hw_storage(struct svga_screen *ss, + struct svga_buffer *sbuf) +{ + if(!sbuf->hw.buf) { + unsigned alignment = sbuf->base.alignment; + unsigned usage = 0; + unsigned size = sbuf->base.size; + + sbuf->hw.buf = svga_winsys_buffer_create(ss, alignment, usage, size); + if(!sbuf->hw.buf) + return PIPE_ERROR_OUT_OF_MEMORY; + + assert(!sbuf->needs_flush); + assert(!sbuf->head.prev && !sbuf->head.next); + LIST_ADD(&sbuf->head, &ss->cached_buffers); + } + + return PIPE_OK; +} + + +/** + * Variant of SVGA3D_BufferDMA which leaves the copy box temporarily in blank. + */ +static enum pipe_error +svga_buffer_upload_command(struct svga_context *svga, + struct svga_buffer *sbuf) +{ + struct svga_winsys_context *swc = svga->swc; + struct svga_winsys_buffer *guest = sbuf->hw.buf; + struct svga_winsys_surface *host = sbuf->handle; + SVGA3dTransferType transfer = SVGA3D_WRITE_HOST_VRAM; + SVGA3dSurfaceDMAFlags flags = sbuf->hw.flags; + SVGA3dCmdSurfaceDMA *cmd; + uint32 numBoxes = sbuf->hw.num_ranges; + SVGA3dCopyBox *boxes; + SVGA3dCmdSurfaceDMASuffix *pSuffix; + unsigned region_flags; + unsigned surface_flags; + struct pipe_buffer *dummy; + + if(transfer == SVGA3D_WRITE_HOST_VRAM) { + region_flags = PIPE_BUFFER_USAGE_GPU_READ; + surface_flags = PIPE_BUFFER_USAGE_GPU_WRITE; + } + else if(transfer == SVGA3D_READ_HOST_VRAM) { + region_flags = PIPE_BUFFER_USAGE_GPU_WRITE; + surface_flags = PIPE_BUFFER_USAGE_GPU_READ; + } + else { + assert(0); + return PIPE_ERROR_BAD_INPUT; + } + + assert(numBoxes); + + cmd = SVGA3D_FIFOReserve(swc, + SVGA_3D_CMD_SURFACE_DMA, + sizeof *cmd + numBoxes * sizeof *boxes + sizeof *pSuffix, + 2); + if(!cmd) + return PIPE_ERROR_OUT_OF_MEMORY; + + swc->region_relocation(swc, &cmd->guest.ptr, guest, 0, region_flags); + cmd->guest.pitch = 0; + + swc->surface_relocation(swc, &cmd->host.sid, host, surface_flags); + cmd->host.face = 0; + cmd->host.mipmap = 0; + + cmd->transfer = transfer; + + sbuf->hw.boxes = (SVGA3dCopyBox *)&cmd[1]; + sbuf->hw.svga = svga; + + /* Increment reference count */ + dummy = NULL; + pipe_buffer_reference(&dummy, &sbuf->base); + + pSuffix = (SVGA3dCmdSurfaceDMASuffix *)((uint8_t*)cmd + sizeof *cmd + numBoxes * sizeof *boxes); + pSuffix->suffixSize = sizeof *pSuffix; + pSuffix->maximumOffset = sbuf->base.size; + pSuffix->flags = flags; + + swc->commit(swc); + + return PIPE_OK; +} + + +/** + * Patch up the upload DMA command reserved by svga_buffer_upload_command + * with the final ranges. + */ +static void +svga_buffer_upload_flush(struct svga_context *svga, + struct svga_buffer *sbuf) +{ + struct svga_screen *ss = svga_screen(svga->pipe.screen); + SVGA3dCopyBox *boxes; + unsigned i; + + assert(sbuf->handle); + assert(sbuf->hw.buf); + assert(sbuf->hw.num_ranges); + assert(sbuf->hw.svga == svga); + assert(sbuf->hw.boxes); + + /* + * Patch the DMA command with the final copy box. + */ + + SVGA_DBG(DEBUG_DMA, "dma to sid %p\n", sbuf->handle); + + boxes = sbuf->hw.boxes; + for(i = 0; i < sbuf->hw.num_ranges; ++i) { + SVGA_DBG(DEBUG_DMA, " bytes %u - %u\n", + sbuf->hw.ranges[i].start, sbuf->hw.ranges[i].end); + + boxes[i].x = sbuf->hw.ranges[i].start; + boxes[i].y = 0; + boxes[i].z = 0; + boxes[i].w = sbuf->hw.ranges[i].end - sbuf->hw.ranges[i].start; + boxes[i].h = 1; + boxes[i].d = 1; + boxes[i].srcx = sbuf->hw.ranges[i].start; + boxes[i].srcy = 0; + boxes[i].srcz = 0; + } + + sbuf->hw.num_ranges = 0; + memset(&sbuf->hw.flags, 0, sizeof sbuf->hw.flags); + + assert(sbuf->head.prev && sbuf->head.next); + LIST_DEL(&sbuf->head); + sbuf->needs_flush = FALSE; + /* XXX: do we care about cached_buffers any more ?*/ + LIST_ADD(&sbuf->head, &ss->cached_buffers); + + sbuf->hw.svga = NULL; + sbuf->hw.boxes = NULL; + + /* Decrement reference count */ + pipe_reference(&(sbuf->base.reference), NULL); + sbuf = NULL; +} + + +/** + * Queue a DMA upload of a range of this buffer to the host. + * + * This function only notes the range down. It doesn't actually emit a DMA + * upload command. That only happens when a context tries to refer to this + * buffer, and the DMA upload command is added to that context's command buffer. + * + * We try to lump as many contiguous DMA transfers together as possible. + */ +static void +svga_buffer_upload_queue(struct svga_buffer *sbuf, + unsigned start, + unsigned end) +{ + unsigned i; + + assert(sbuf->hw.buf); + assert(end > start); + + /* + * 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_buffer_referenced and the context that refers to the + * buffer should be flushed. + */ + + for(i = 0; i < sbuf->hw.num_ranges; ++i) { + if(start <= sbuf->hw.ranges[i].end && sbuf->hw.ranges[i].start <= end) { + sbuf->hw.ranges[i].start = MIN2(sbuf->hw.ranges[i].start, start); + sbuf->hw.ranges[i].end = MAX2(sbuf->hw.ranges[i].end, end); + return; + } + } + + /* + * We cannot add a new range to an existing DMA command, so patch-up the + * pending DMA upload and start clean. + */ + + if(sbuf->needs_flush) + svga_buffer_upload_flush(sbuf->hw.svga, sbuf); + + assert(!sbuf->needs_flush); + assert(!sbuf->hw.svga); + assert(!sbuf->hw.boxes); + + /* + * Add a new range. + */ + + sbuf->hw.ranges[sbuf->hw.num_ranges].start = start; + sbuf->hw.ranges[sbuf->hw.num_ranges].end = end; + ++sbuf->hw.num_ranges; +} + + +static void * +svga_buffer_map_range( struct pipe_screen *screen, + struct pipe_buffer *buf, + unsigned offset, unsigned length, + unsigned usage ) +{ + struct svga_screen *ss = svga_screen(screen); + struct svga_winsys_screen *sws = ss->sws; + struct svga_buffer *sbuf = svga_buffer( buf ); + void *map; + + if(sbuf->swbuf) { + /* User/malloc buffer */ + map = sbuf->swbuf; + } + else { + if(!sbuf->hw.buf) { + struct svga_winsys_surface *handle = sbuf->handle; + + if(svga_buffer_create_hw_storage(ss, sbuf) != PIPE_OK) + return NULL; + + /* Populate the hardware storage if the host surface pre-existed */ + if((usage & PIPE_BUFFER_USAGE_CPU_READ) && handle) { + SVGA3dSurfaceDMAFlags flags; + enum pipe_error ret; + struct pipe_fence_handle *fence = NULL; + + SVGA_DBG(DEBUG_DMA|DEBUG_PERF, "dma from sid %p (buffer), bytes %u - %u\n", + sbuf->handle, 0, sbuf->base.size); + + memset(&flags, 0, sizeof flags); + + ret = SVGA3D_BufferDMA(ss->swc, + sbuf->hw.buf, + sbuf->handle, + SVGA3D_READ_HOST_VRAM, + sbuf->base.size, + 0, + flags); + if(ret != PIPE_OK) { + ss->swc->flush(ss->swc, NULL); + + ret = SVGA3D_BufferDMA(ss->swc, + sbuf->hw.buf, + sbuf->handle, + SVGA3D_READ_HOST_VRAM, + sbuf->base.size, + 0, + flags); + assert(ret == PIPE_OK); + } + + ss->swc->flush(ss->swc, &fence); + sws->fence_finish(sws, fence, 0); + sws->fence_reference(sws, &fence, NULL); + } + } + else { + if((usage & PIPE_BUFFER_USAGE_CPU_READ) && !sbuf->needs_flush) { + /* We already had the hardware storage but we would have to issue + * a download if we hadn't, so move the buffer to the begginning + * of the LRU list. + */ + assert(sbuf->head.prev && sbuf->head.next); + LIST_DEL(&sbuf->head); + LIST_ADD(&sbuf->head, &ss->cached_buffers); + } + } + + map = sws->buffer_map(sws, sbuf->hw.buf, usage); + } + + if(map) { + pipe_mutex_lock(ss->swc_mutex); + + ++sbuf->map.count; + + if (usage & PIPE_BUFFER_USAGE_CPU_WRITE) { + assert(sbuf->map.count <= 1); + sbuf->map.writing = TRUE; + if (usage & PIPE_BUFFER_USAGE_FLUSH_EXPLICIT) + sbuf->map.flush_explicit = TRUE; + } + + pipe_mutex_unlock(ss->swc_mutex); + } + + return map; +} + +static void +svga_buffer_flush_mapped_range( struct pipe_screen *screen, + struct pipe_buffer *buf, + unsigned offset, unsigned length) +{ + struct svga_buffer *sbuf = svga_buffer( buf ); + struct svga_screen *ss = svga_screen(screen); + + pipe_mutex_lock(ss->swc_mutex); + assert(sbuf->map.writing); + if(sbuf->map.writing) { + assert(sbuf->map.flush_explicit); + if(sbuf->hw.buf) + svga_buffer_upload_queue(sbuf, offset, offset + length); + } + pipe_mutex_unlock(ss->swc_mutex); +} + +static void +svga_buffer_unmap( struct pipe_screen *screen, + struct pipe_buffer *buf) +{ + struct svga_screen *ss = svga_screen(screen); + struct svga_winsys_screen *sws = ss->sws; + struct svga_buffer *sbuf = svga_buffer( buf ); + + pipe_mutex_lock(ss->swc_mutex); + + assert(sbuf->map.count); + if(sbuf->map.count) + --sbuf->map.count; + + if(sbuf->hw.buf) + sws->buffer_unmap(sws, sbuf->hw.buf); + + if(sbuf->map.writing) { + if(!sbuf->map.flush_explicit) { + /* No mapped range was flushed -- flush the whole buffer */ + SVGA_DBG(DEBUG_DMA, "flushing the whole buffer\n"); + + if(sbuf->hw.buf) + svga_buffer_upload_queue(sbuf, 0, sbuf->base.size); + } + + sbuf->map.writing = FALSE; + sbuf->map.flush_explicit = FALSE; + } + + pipe_mutex_unlock(ss->swc_mutex); +} + +static void +svga_buffer_destroy( struct pipe_buffer *buf ) +{ + struct svga_screen *ss = svga_screen(buf->screen); + struct svga_buffer *sbuf = svga_buffer( buf ); + + assert(!p_atomic_read(&buf->reference.count)); + + assert(!sbuf->needs_flush); + + if(sbuf->handle) { + SVGA_DBG(DEBUG_DMA, "release sid %p sz %d\n", sbuf->handle, sbuf->base.size); + svga_screen_surface_destroy(ss, &sbuf->key, &sbuf->handle); + } + + if(sbuf->hw.buf) + svga_buffer_destroy_hw_storage(ss, sbuf); + + if(sbuf->swbuf && !sbuf->user) + align_free(sbuf->swbuf); + + FREE(sbuf); +} + +static struct pipe_buffer * +svga_buffer_create(struct pipe_screen *screen, + unsigned alignment, + unsigned usage, + unsigned size) +{ + struct svga_screen *ss = svga_screen(screen); + struct svga_buffer *sbuf; + + sbuf = CALLOC_STRUCT(svga_buffer); + if(!sbuf) + goto error1; + + sbuf->magic = SVGA_BUFFER_MAGIC; + + pipe_reference_init(&sbuf->base.reference, 1); + sbuf->base.screen = screen; + sbuf->base.alignment = alignment; + sbuf->base.usage = usage; + sbuf->base.size = size; + + if(svga_buffer_needs_hw_storage(usage)) { + if(svga_buffer_create_host_surface(ss, sbuf) != PIPE_OK) + goto error2; + } + else { + if(alignment < sizeof(void*)) + alignment = sizeof(void*); + + usage |= PIPE_BUFFER_USAGE_CPU_READ_WRITE; + + sbuf->swbuf = align_malloc(size, alignment); + if(!sbuf->swbuf) + goto error2; + } + + return &sbuf->base; + +error2: + FREE(sbuf); +error1: + return NULL; +} + +static struct pipe_buffer * +svga_user_buffer_create(struct pipe_screen *screen, + void *ptr, + unsigned bytes) +{ + struct svga_buffer *sbuf; + + sbuf = CALLOC_STRUCT(svga_buffer); + if(!sbuf) + goto no_sbuf; + + sbuf->magic = SVGA_BUFFER_MAGIC; + + sbuf->swbuf = ptr; + sbuf->user = TRUE; + + pipe_reference_init(&sbuf->base.reference, 1); + sbuf->base.screen = screen; + sbuf->base.alignment = 1; + sbuf->base.usage = 0; + sbuf->base.size = bytes; + + return &sbuf->base; + +no_sbuf: + return NULL; +} + + +void +svga_screen_init_buffer_functions(struct pipe_screen *screen) +{ + screen->buffer_create = svga_buffer_create; + screen->user_buffer_create = svga_user_buffer_create; + screen->buffer_map_range = svga_buffer_map_range; + screen->buffer_flush_mapped_range = svga_buffer_flush_mapped_range; + screen->buffer_unmap = svga_buffer_unmap; + screen->buffer_destroy = svga_buffer_destroy; +} + + +/** + * Copy the contents of the user buffer / malloc buffer to a hardware buffer. + */ +static INLINE enum pipe_error +svga_buffer_update_hw(struct svga_screen *ss, struct svga_buffer *sbuf) +{ + if(!sbuf->hw.buf) { + enum pipe_error ret; + void *map; + + assert(sbuf->swbuf); + if(!sbuf->swbuf) + return PIPE_ERROR; + + ret = svga_buffer_create_hw_storage(ss, sbuf); + assert(ret == PIPE_OK); + if(ret != PIPE_OK) + return ret; + + pipe_mutex_lock(ss->swc_mutex); + map = ss->sws->buffer_map(ss->sws, sbuf->hw.buf, PIPE_BUFFER_USAGE_CPU_WRITE); + assert(map); + if(!map) { + pipe_mutex_unlock(ss->swc_mutex); + return PIPE_ERROR_OUT_OF_MEMORY; + } + + memcpy(map, sbuf->swbuf, sbuf->base.size); + ss->sws->buffer_unmap(ss->sws, sbuf->hw.buf); + + /* This user/malloc buffer is now indistinguishable from a gpu buffer */ + assert(!sbuf->map.count); + if(!sbuf->map.count) { + if(sbuf->user) + sbuf->user = FALSE; + else + align_free(sbuf->swbuf); + sbuf->swbuf = NULL; + } + + svga_buffer_upload_queue(sbuf, 0, sbuf->base.size); + } + + pipe_mutex_unlock(ss->swc_mutex); + return PIPE_OK; +} + + +struct svga_winsys_surface * +svga_buffer_handle(struct svga_context *svga, + struct pipe_buffer *buf) +{ + struct pipe_screen *screen = svga->pipe.screen; + struct svga_screen *ss = svga_screen(screen); + struct svga_buffer *sbuf; + enum pipe_error ret; + + if(!buf) + return NULL; + + sbuf = svga_buffer(buf); + + assert(!sbuf->map.count); + + if(!sbuf->handle) { + ret = svga_buffer_create_host_surface(ss, sbuf); + if(ret != PIPE_OK) + return NULL; + + ret = svga_buffer_update_hw(ss, sbuf); + if(ret != PIPE_OK) + return NULL; + } + + if(!sbuf->needs_flush && sbuf->hw.num_ranges) { + /* Queue the buffer for flushing */ + ret = svga_buffer_upload_command(svga, sbuf); + if(ret != PIPE_OK) + /* XXX: Should probably have a richer return value */ + return NULL; + + assert(sbuf->hw.svga == svga); + + sbuf->needs_flush = TRUE; + assert(sbuf->head.prev && sbuf->head.next); + LIST_DEL(&sbuf->head); + LIST_ADDTAIL(&sbuf->head, &svga->dirty_buffers); + } + + return sbuf->handle; +} + +struct pipe_buffer * +svga_screen_buffer_wrap_surface(struct pipe_screen *screen, + enum SVGA3dSurfaceFormat format, + struct svga_winsys_surface *srf) +{ + struct pipe_buffer *buf; + struct svga_buffer *sbuf; + struct svga_winsys_screen *sws = svga_winsys_screen(screen); + + buf = svga_buffer_create(screen, 0, SVGA_BUFFER_USAGE_WRAPPED, 0); + if (!buf) + return NULL; + + sbuf = svga_buffer(buf); + + /* + * We are not the creator of this surface and therefore we must not + * cache it for reuse. Set the cacheable flag to zero in the key to + * prevent this. + */ + sbuf->key.format = format; + sbuf->key.cachable = 0; + sws->surface_reference(sws, &sbuf->handle, srf); + + return buf; +} + + +struct svga_winsys_surface * +svga_screen_buffer_get_winsys_surface(struct pipe_buffer *buffer) +{ + struct svga_winsys_screen *sws = svga_winsys_screen(buffer->screen); + struct svga_winsys_surface *vsurf = NULL; + + assert(svga_buffer(buffer)->key.cachable == 0); + svga_buffer(buffer)->key.cachable = 0; + sws->surface_reference(sws, &vsurf, svga_buffer(buffer)->handle); + return vsurf; +} + +void +svga_context_flush_buffers(struct svga_context *svga) +{ + struct list_head *curr, *next; + struct svga_buffer *sbuf; + + curr = svga->dirty_buffers.next; + next = curr->next; + while(curr != &svga->dirty_buffers) { + sbuf = LIST_ENTRY(struct svga_buffer, curr, head); + + assert(p_atomic_read(&sbuf->base.reference.count) != 0); + assert(sbuf->needs_flush); + + svga_buffer_upload_flush(svga, sbuf); + + curr = next; + next = curr->next; + } +} |