+ if (!count) {
+ drm_r300_cmd_header_t header;
+
+ if (cmdbuf->bufsz < 4*4 + sizeof(header)) {
+ DRM_ERROR("3D_DRAW_INDX_2: expect subsequent INDX_BUFFER, but stream is too short.\n");
+ return -EINVAL;
+ }
+
+ header.u = *(unsigned int *)cmdbuf->buf;
+
+ cmdbuf->buf += sizeof(header);
+ cmdbuf->bufsz -= sizeof(header);
+ cmd = (u32 *) cmdbuf->buf;
+
+ if (header.header.cmd_type != R300_CMD_PACKET3 ||
+ header.packet3.packet != R300_CMD_PACKET3_RAW ||
+ cmd[0] != CP_PACKET3(RADEON_CP_INDX_BUFFER, 2)) {
+ DRM_ERROR("3D_DRAW_INDX_2: expect subsequent INDX_BUFFER.\n");
+ return -EINVAL;
+ }
+
+ if ((cmd[1] & 0x8000ffff) != 0x80000810) {
+ DRM_ERROR("Invalid indx_buffer reg address %08X\n", cmd[1]);
+ return -EINVAL;
+ }
+ if (!radeon_check_offset(dev_priv, cmd[2])) {
+ DRM_ERROR("Invalid indx_buffer offset is %08X\n", cmd[2]);
+ return -EINVAL;
+ }
+ if (cmd[3] != expected_count) {
+ DRM_ERROR("INDX_BUFFER: buffer size %i, expected %i\n",
+ cmd[3], expected_count);
+ return -EINVAL;
+ }
+
+ BEGIN_RING(4);
+ OUT_RING(cmd[0]);
+ OUT_RING_TABLE((int *)(cmdbuf->buf + 4), 3);
+ ADVANCE_RING();
+
+ cmdbuf->buf += 4*4;
+ cmdbuf->bufsz -= 4*4;
+ }
+