- if (rbuf->b.b.user_ptr)
- return rbuf->b.b.user_ptr + transfer->box.x;
- if (rbuf->constant_buffer)
- return (uint8_t *) rbuf->constant_buffer + transfer->box.x;
+ transfer = slab_alloc(&r300->pool_transfers);
+ transfer->resource = resource;
+ transfer->level = level;
+ transfer->usage = usage;
+ transfer->box = *box;
+ transfer->stride = 0;
+ transfer->layer_stride = 0;
+
+ if (rbuf->malloced_buffer) {
+ *ptransfer = transfer;
+ return rbuf->malloced_buffer + box->x;
+ }
+
+ if (usage & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE &&
+ !(usage & PIPE_TRANSFER_UNSYNCHRONIZED)) {
+ assert(usage & PIPE_TRANSFER_WRITE);
+
+ /* Check if mapping this buffer would cause waiting for the GPU. */
+ if (r300->rws->cs_is_buffer_referenced(r300->cs, rbuf->buf, RADEON_USAGE_READWRITE) ||
+ !r300->rws->buffer_wait(rbuf->buf, 0, RADEON_USAGE_READWRITE)) {
+ unsigned i;
+ struct pb_buffer *new_buf;
+
+ /* Create a new one in the same pipe_resource. */
+ new_buf = r300->rws->buffer_create(r300->rws, rbuf->b.b.width0,
+ R300_BUFFER_ALIGNMENT,
+ rbuf->domain,
+ RADEON_FLAG_NO_INTERPROCESS_SHARING);
+ if (new_buf) {
+ /* Discard the old buffer. */
+ pb_reference(&rbuf->buf, NULL);
+ rbuf->buf = new_buf;
+
+ /* We changed the buffer, now we need to bind it where the old one was bound. */
+ for (i = 0; i < r300->nr_vertex_buffers; i++) {
+ if (r300->vertex_buffer[i].buffer.resource == &rbuf->b.b) {
+ r300->vertex_arrays_dirty = TRUE;
+ break;
+ }
+ }
+ }
+ }
+ }