diff options
Diffstat (limited to 'src/gallium/drivers/svga/svga_resource_buffer_upload.c')
| -rw-r--r-- | src/gallium/drivers/svga/svga_resource_buffer_upload.c | 634 |
1 files changed, 634 insertions, 0 deletions
diff --git a/src/gallium/drivers/svga/svga_resource_buffer_upload.c b/src/gallium/drivers/svga/svga_resource_buffer_upload.c new file mode 100644 index 00000000000..acef60f4647 --- /dev/null +++ b/src/gallium/drivers/svga/svga_resource_buffer_upload.c @@ -0,0 +1,634 @@ +/********************************************************** + * 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 "util/u_inlines.h" +#include "os/os_thread.h" +#include "util/u_math.h" +#include "util/u_memory.h" + +#include "svga_context.h" +#include "svga_screen.h" +#include "svga_resource_buffer.h" +#include "svga_resource_buffer_upload.h" +#include "svga_winsys.h" +#include "svga_debug.h" + + +/* Allocate a winsys_buffer (ie. DMA, aka GMR memory). + */ +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); + + } + + return buf; +} + + +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->hwbuf); + if(sbuf->hwbuf) { + sws->buffer_destroy(sws, sbuf->hwbuf); + sbuf->hwbuf = NULL; + } +} + + + +/** + * Allocate DMA'ble storage for the buffer. + * + * Called before mapping a buffer. + */ +enum pipe_error +svga_buffer_create_hw_storage(struct svga_screen *ss, + struct svga_buffer *sbuf) +{ + assert(!sbuf->user); + + if(!sbuf->hwbuf) { + unsigned alignment = 16; + unsigned usage = 0; + unsigned size = sbuf->b.b.width0; + + sbuf->hwbuf = svga_winsys_buffer_create(ss, alignment, usage, size); + if(!sbuf->hwbuf) + return PIPE_ERROR_OUT_OF_MEMORY; + + assert(!sbuf->dma.pending); + } + + return PIPE_OK; +} + + + +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->b.b.bind & PIPE_BIND_VERTEX_BUFFER) + sbuf->key.flags |= SVGA3D_SURFACE_HINT_VERTEXBUFFER; + if(sbuf->b.b.bind & PIPE_BIND_INDEX_BUFFER) + sbuf->key.flags |= SVGA3D_SURFACE_HINT_INDEXBUFFER; + + sbuf->key.size.width = sbuf->b.b.width0; + 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->b.b.width0); + + 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->dma.flags.discard = TRUE; + + SVGA_DBG(DEBUG_DMA, " --> got sid %p sz %d (buffer)\n", sbuf->handle, sbuf->b.b.width0); + } + + return PIPE_OK; +} + + +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->b.b.width0); + svga_screen_surface_destroy(ss, &sbuf->key, &sbuf->handle); + } +} + + +/** + * 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->hwbuf; + struct svga_winsys_surface *host = sbuf->handle; + SVGA3dTransferType transfer = SVGA3D_WRITE_HOST_VRAM; + SVGA3dCmdSurfaceDMA *cmd; + uint32 numBoxes = sbuf->map.num_ranges; + SVGA3dCopyBox *boxes; + SVGA3dCmdSurfaceDMASuffix *pSuffix; + unsigned region_flags; + unsigned surface_flags; + struct pipe_resource *dummy; + + if(transfer == SVGA3D_WRITE_HOST_VRAM) { + region_flags = SVGA_RELOC_READ; + surface_flags = SVGA_RELOC_WRITE; + } + else if(transfer == SVGA3D_READ_HOST_VRAM) { + region_flags = SVGA_RELOC_WRITE; + surface_flags = SVGA_RELOC_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->dma.boxes = (SVGA3dCopyBox *)&cmd[1]; + sbuf->dma.svga = svga; + + /* Increment reference count */ + dummy = NULL; + pipe_resource_reference(&dummy, &sbuf->b.b); + + pSuffix = (SVGA3dCmdSurfaceDMASuffix *)((uint8_t*)cmd + sizeof *cmd + numBoxes * sizeof *boxes); + pSuffix->suffixSize = sizeof *pSuffix; + pSuffix->maximumOffset = sbuf->b.b.width0; + pSuffix->flags = sbuf->dma.flags; + + SVGA_FIFOCommitAll(swc); + + sbuf->dma.flags.discard = FALSE; + + 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) +{ + SVGA3dCopyBox *boxes; + unsigned i; + + assert(sbuf->handle); + assert(sbuf->hwbuf); + assert(sbuf->map.num_ranges); + assert(sbuf->dma.svga == svga); + assert(sbuf->dma.boxes); + + /* + * Patch the DMA command with the final copy box. + */ + + SVGA_DBG(DEBUG_DMA, "dma to sid %p\n", sbuf->handle); + + boxes = sbuf->dma.boxes; + for(i = 0; i < sbuf->map.num_ranges; ++i) { + SVGA_DBG(DEBUG_DMA, " bytes %u - %u\n", + sbuf->map.ranges[i].start, sbuf->map.ranges[i].end); + + boxes[i].x = sbuf->map.ranges[i].start; + boxes[i].y = 0; + boxes[i].z = 0; + boxes[i].w = sbuf->map.ranges[i].end - sbuf->map.ranges[i].start; + boxes[i].h = 1; + boxes[i].d = 1; + boxes[i].srcx = sbuf->map.ranges[i].start; + boxes[i].srcy = 0; + boxes[i].srcz = 0; + } + + sbuf->map.num_ranges = 0; + + assert(sbuf->head.prev && sbuf->head.next); + LIST_DEL(&sbuf->head); +#ifdef DEBUG + sbuf->head.next = sbuf->head.prev = NULL; +#endif + sbuf->dma.pending = FALSE; + + sbuf->dma.svga = NULL; + sbuf->dma.boxes = NULL; + + /* Decrement reference count */ + pipe_reference(&(sbuf->b.b.reference), NULL); + sbuf = NULL; +} + + + +/** + * Note a dirty range. + * + * 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. + */ +void +svga_buffer_add_range(struct svga_buffer *sbuf, + unsigned start, + unsigned end) +{ + unsigned i; + unsigned nearest_range; + unsigned nearest_dist; + + assert(end > start); + + if (sbuf->map.num_ranges < SVGA_BUFFER_MAX_RANGES) { + nearest_range = sbuf->map.num_ranges; + nearest_dist = ~0; + } else { + nearest_range = SVGA_BUFFER_MAX_RANGES - 1; + nearest_dist = 0; + } + + /* + * 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) { + int left_dist; + int right_dist; + int dist; + + left_dist = start - sbuf->map.ranges[i].end; + right_dist = sbuf->map.ranges[i].start - end; + dist = MAX2(left_dist, right_dist); + + if (dist <= 0) { + /* + * Ranges are contiguous or overlapping -- extend this one and return. + */ + + sbuf->map.ranges[i].start = MIN2(sbuf->map.ranges[i].start, start); + sbuf->map.ranges[i].end = MAX2(sbuf->map.ranges[i].end, end); + return; + } + else { + /* + * Discontiguous ranges -- keep track of the nearest range. + */ + + if (dist < nearest_dist) { + nearest_range = i; + nearest_dist = dist; + } + } + } + + /* + * We cannot add a new range to an existing DMA command, so patch-up the + * pending DMA upload and start clean. + */ + + if(sbuf->dma.pending) + svga_buffer_upload_flush(sbuf->dma.svga, sbuf); + + assert(!sbuf->dma.pending); + assert(!sbuf->dma.svga); + assert(!sbuf->dma.boxes); + + if (sbuf->map.num_ranges < SVGA_BUFFER_MAX_RANGES) { + /* + * Add a new range. + */ + + sbuf->map.ranges[sbuf->map.num_ranges].start = start; + sbuf->map.ranges[sbuf->map.num_ranges].end = end; + ++sbuf->map.num_ranges; + } else { + /* + * Everything else failed, so just extend the nearest range. + * + * It is OK to do this because we always keep a local copy of the + * host buffer data, for SW TNL, and the host never modifies the buffer. + */ + + assert(nearest_range < SVGA_BUFFER_MAX_RANGES); + assert(nearest_range < sbuf->map.num_ranges); + sbuf->map.ranges[nearest_range].start = MIN2(sbuf->map.ranges[nearest_range].start, start); + sbuf->map.ranges[nearest_range].end = MAX2(sbuf->map.ranges[nearest_range].end, end); + } +} + + + +/** + * Copy the contents of the malloc buffer to a hardware buffer. + */ +static INLINE enum pipe_error +svga_buffer_update_hw(struct svga_screen *ss, struct svga_buffer *sbuf) +{ + assert(!sbuf->user); + if(!sbuf->hwbuf) { + enum pipe_error ret; + void *map; + + assert(sbuf->swbuf); + if(!sbuf->swbuf) + return PIPE_ERROR; + + ret = svga_buffer_create_hw_storage(ss, sbuf); + if(ret != PIPE_OK) + return ret; + + pipe_mutex_lock(ss->swc_mutex); + map = ss->sws->buffer_map(ss->sws, sbuf->hwbuf, PIPE_TRANSFER_WRITE); + assert(map); + if(!map) { + pipe_mutex_unlock(ss->swc_mutex); + svga_buffer_destroy_hw_storage(ss, sbuf); + return PIPE_ERROR; + } + + memcpy(map, sbuf->swbuf, sbuf->b.b.width0); + ss->sws->buffer_unmap(ss->sws, sbuf->hwbuf); + + /* 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; + } + + pipe_mutex_unlock(ss->swc_mutex); + } + + return PIPE_OK; +} + + +/** + * Upload the buffer to the host in a piecewise fashion. + * + * Used when the buffer is too big to fit in the GMR aperture. + */ +static INLINE enum pipe_error +svga_buffer_upload_piecewise(struct svga_screen *ss, + struct svga_context *svga, + struct svga_buffer *sbuf) +{ + struct svga_winsys_screen *sws = ss->sws; + const unsigned alignment = sizeof(void *); + const unsigned usage = 0; + unsigned i; + + assert(sbuf->map.num_ranges); + assert(!sbuf->dma.pending); + + SVGA_DBG(DEBUG_DMA, "dma to sid %p\n", sbuf->handle); + + for (i = 0; i < sbuf->map.num_ranges; ++i) { + struct svga_buffer_range *range = &sbuf->map.ranges[i]; + unsigned offset = range->start; + unsigned size = range->end - range->start; + + while (offset < range->end) { + struct svga_winsys_buffer *hwbuf; + uint8_t *map; + enum pipe_error ret; + + if (offset + size > range->end) + size = range->end - offset; + + hwbuf = svga_winsys_buffer_create(ss, alignment, usage, size); + while (!hwbuf) { + size /= 2; + if (!size) + return PIPE_ERROR_OUT_OF_MEMORY; + hwbuf = svga_winsys_buffer_create(ss, alignment, usage, size); + } + + SVGA_DBG(DEBUG_DMA, " bytes %u - %u\n", + offset, offset + size); + + map = sws->buffer_map(sws, hwbuf, + PIPE_TRANSFER_WRITE | + PIPE_TRANSFER_DISCARD); + assert(map); + if (map) { + memcpy(map, sbuf->swbuf, size); + sws->buffer_unmap(sws, hwbuf); + } + + ret = SVGA3D_BufferDMA(svga->swc, + hwbuf, sbuf->handle, + SVGA3D_WRITE_HOST_VRAM, + size, 0, offset, sbuf->dma.flags); + if(ret != PIPE_OK) { + svga_context_flush(svga, NULL); + ret = SVGA3D_BufferDMA(svga->swc, + hwbuf, sbuf->handle, + SVGA3D_WRITE_HOST_VRAM, + size, 0, offset, sbuf->dma.flags); + assert(ret == PIPE_OK); + } + + sbuf->dma.flags.discard = FALSE; + + sws->buffer_destroy(sws, hwbuf); + + offset += size; + } + } + + sbuf->map.num_ranges = 0; + + return PIPE_OK; +} + + + + +/* Get (or create/upload) the winsys surface handle so that we can + * refer to this buffer in fifo commands. + */ +struct svga_winsys_surface * +svga_buffer_handle(struct svga_context *svga, + struct pipe_resource *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); + assert(!sbuf->user); + + if(!sbuf->handle) { + ret = svga_buffer_create_host_surface(ss, sbuf); + if(ret != PIPE_OK) + return NULL; + } + + assert(sbuf->handle); + + if (sbuf->map.num_ranges) { + if (!sbuf->dma.pending) { + /* + * No pending DMA upload yet, so insert a DMA upload command now. + */ + + /* + * Migrate the data from swbuf -> hwbuf if necessary. + */ + ret = svga_buffer_update_hw(ss, sbuf); + if (ret == PIPE_OK) { + /* + * Queue a dma command. + */ + + ret = svga_buffer_upload_command(svga, sbuf); + if (ret == PIPE_ERROR_OUT_OF_MEMORY) { + svga_context_flush(svga, NULL); + ret = svga_buffer_upload_command(svga, sbuf); + assert(ret == PIPE_OK); + } + if (ret == PIPE_OK) { + sbuf->dma.pending = TRUE; + assert(!sbuf->head.prev && !sbuf->head.next); + LIST_ADDTAIL(&sbuf->head, &svga->dirty_buffers); + } + } + else if (ret == PIPE_ERROR_OUT_OF_MEMORY) { + /* + * The buffer is too big to fit in the GMR aperture, so break it in + * smaller pieces. + */ + ret = svga_buffer_upload_piecewise(ss, svga, sbuf); + } + + if (ret != PIPE_OK) { + /* + * Something unexpected happened above. There is very little that + * we can do other than proceeding while ignoring the dirty ranges. + */ + assert(0); + sbuf->map.num_ranges = 0; + } + } + else { + /* + * There a pending dma already. Make sure it is from this context. + */ + assert(sbuf->dma.svga == svga); + } + } + + assert(!sbuf->map.num_ranges || sbuf->dma.pending); + + return sbuf->handle; +} + + + +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->b.b.reference.count) != 0); + assert(sbuf->dma.pending); + + svga_buffer_upload_flush(svga, sbuf); + + curr = next; + next = curr->next; + } +} |