Using DMA for reads is much faster.
Signed-off-by: Niels Ole Salscheider <niels_...@salscheider-online.de>
---
src/gallium/drivers/radeon/r600_buffer_common.c | 74 +++++++++++++++++++------
1 file changed, 56 insertions(+), 18 deletions(-)
diff --git a/src/gallium/drivers/radeon/r600_buffer_common.c
b/src/gallium/drivers/radeon/r600_buffer_common.c
index 340ebb2..90ca8cb 100644
--- a/src/gallium/drivers/radeon/r600_buffer_common.c
+++ b/src/gallium/drivers/radeon/r600_buffer_common.c
@@ -260,6 +260,42 @@ static void *r600_buffer_transfer_map(struct pipe_context
*ctx,
/* At this point, the buffer is always idle (we checked it
above). */
usage |= PIPE_TRANSFER_UNSYNCHRONIZED;
}
+ /* Using DMA for larger reads is much faster */
+ else if ((usage & PIPE_TRANSFER_READ) &&
+ !(usage & PIPE_TRANSFER_WRITE) &&
+ (rbuffer->domains == RADEON_DOMAIN_VRAM)) {
+ unsigned offset;
+ struct r600_resource *staging = NULL;
+
+ u_upload_alloc(rctx->uploader, 0,
+ box->width + (box->x %
R600_MAP_BUFFER_ALIGNMENT),
+ &offset, (struct pipe_resource**)&staging,
(void**)&data);
+
+ if (staging) {
+ data += box->x % R600_MAP_BUFFER_ALIGNMENT;
+
+ /* Copy the staging buffer into the original one. */
+ if (rctx->dma_copy(ctx, (struct pipe_resource*)staging,
0,
+ box->x %
R600_MAP_BUFFER_ALIGNMENT,
+ 0, 0, resource, level, box)) {
+ rctx->rings.gfx.flush(rctx, 0);
+ if (rctx->rings.dma.cs)
+ rctx->rings.dma.flush(rctx, 0);
+
+ /* Wait for any offloaded CS flush to complete
+ * to avoid busy-waiting in the winsys. */
+ rctx->ws->cs_sync_flush(rctx->rings.gfx.cs);
+ if (rctx->rings.dma.cs)
+
rctx->ws->cs_sync_flush(rctx->rings.dma.cs);
+
+ rctx->ws->buffer_wait(staging->buf,
RADEON_USAGE_WRITE);
+ return r600_buffer_get_transfer(ctx, resource,
level, usage, box,
+ ptransfer,
data, staging, offset);
+ } else {
+ pipe_resource_reference((struct
pipe_resource**)&staging, NULL);
+ }
+ }
+ }
data = r600_buffer_map_sync_with_rings(rctx, rbuffer, usage);
if (!data) {
@@ -279,24 +315,26 @@ static void r600_buffer_transfer_unmap(struct
pipe_context *ctx,
struct r600_resource *rbuffer = r600_resource(transfer->resource);
if (rtransfer->staging) {
- struct pipe_resource *dst, *src;
- unsigned soffset, doffset, size;
- struct pipe_box box;
-
- dst = transfer->resource;
- src = &rtransfer->staging->b.b;
- size = transfer->box.width;
- doffset = transfer->box.x;
- soffset = rtransfer->offset + transfer->box.x %
R600_MAP_BUFFER_ALIGNMENT;
-
- u_box_1d(soffset, size, &box);
-
- /* Copy the staging buffer into the original one. */
- if (!(size % 4) && !(doffset % 4) && !(soffset % 4) &&
- rctx->dma_copy(ctx, dst, 0, doffset, 0, 0, src, 0, &box)) {
- /* DONE. */
- } else {
- ctx->resource_copy_region(ctx, dst, 0, doffset, 0, 0,
src, 0, &box);
+ if (rtransfer->transfer.usage & PIPE_TRANSFER_WRITE) {
+ struct pipe_resource *dst, *src;
+ unsigned soffset, doffset, size;
+ struct pipe_box box;
+
+ dst = transfer->resource;
+ src = &rtransfer->staging->b.b;
+ size = transfer->box.width;
+ doffset = transfer->box.x;
+ soffset = rtransfer->offset + transfer->box.x %
R600_MAP_BUFFER_ALIGNMENT;
+
+ u_box_1d(soffset, size, &box);
+
+ /* Copy the staging buffer into the original one. */
+ if (!(size % 4) && !(doffset % 4) && !(soffset % 4) &&
+ rctx->dma_copy(ctx, dst, 0, doffset, 0, 0, src, 0,
&box)) {
+ /* DONE. */
+ } else {
+ ctx->resource_copy_region(ctx, dst, 0, doffset,
0, 0, src, 0, &box);
+ }
}
pipe_resource_reference((struct
pipe_resource**)&rtransfer->staging, NULL);
}
--
1.9.0
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