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r600g: assume DISCARD_WHOLE_RESOURCE is always used with WRITE

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This commit is contained in:
Marek Olšák
2012-05-11 17:34:26 +02:00
parent 7435c04398
commit d3bab0c7be
1 changed files with 5 additions and 6 deletions
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src/gallium/drivers/r600/r600_buffer.c
+5 -6
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@@ -86,14 +86,13 @@ static void *r600_buffer_transfer_map(struct pipe_context *pipe,
struct r600_context *rctx = (struct r600_context*)pipe;
uint8_t *data;
if (transfer->usage & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE) {
/* When mapping for read, we only need to check if the GPU is writing to it. */
enum radeon_bo_usage rusage = transfer->usage & PIPE_TRANSFER_WRITE ?
RADEON_USAGE_READWRITE : RADEON_USAGE_WRITE;
if (transfer->usage & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE &&
!(transfer->usage & PIPE_TRANSFER_UNSYNCHRONIZED)) {
assert(transfer->usage & PIPE_TRANSFER_WRITE);
/* Check if mapping this buffer would cause waiting for the GPU. */
if (rctx->ws->cs_is_buffer_referenced(rctx->cs, rbuffer->cs_buf, rusage) ||
rctx->ws->buffer_is_busy(rbuffer->buf, rusage)) {
if (rctx->ws->cs_is_buffer_referenced(rctx->cs, rbuffer->cs_buf, RADEON_USAGE_READWRITE) ||
rctx->ws->buffer_is_busy(rbuffer->buf, RADEON_USAGE_READWRITE)) {
unsigned i;
/* Discard the buffer. */