+ switch(cmd[0] & 0xff00) {
+ /* XXX Are there old drivers needing other packets? */
+
+ case RADEON_3D_DRAW_IMMD:
+ case RADEON_3D_DRAW_VBUF:
+ case RADEON_3D_DRAW_INDX:
+ case RADEON_WAIT_FOR_IDLE:
+ case RADEON_CP_NOP:
+ case RADEON_3D_CLEAR_ZMASK:
+/* case RADEON_CP_NEXT_CHAR:
+ case RADEON_CP_PLY_NEXTSCAN:
+ case RADEON_CP_SET_SCISSORS: */ /* probably safe but will never need them? */
+ /* these packets are safe */
+ break;
+
+ case RADEON_CP_3D_DRAW_IMMD_2:
+ case RADEON_CP_3D_DRAW_VBUF_2:
+ case RADEON_CP_3D_DRAW_INDX_2:
+ case RADEON_3D_CLEAR_HIZ:
+ /* safe but r200 only */
+ if (dev_priv->microcode_version != UCODE_R200) {
+ DRM_ERROR("Invalid 3d packet for r100-class chip\n");
+ return DRM_ERR(EINVAL);
+ }
+ break;
+
+ case RADEON_3D_LOAD_VBPNTR:
+ count = (cmd[0] >> 16) & 0x3fff;
+
+ if (count > 18) { /* 12 arrays max */
+ DRM_ERROR("Too large payload in 3D_LOAD_VBPNTR (count=%d)\n",
+ count);
+ return DRM_ERR(EINVAL);
+ }
+
+ /* carefully check packet contents */
+ narrays = cmd[1] & ~0xc000;
+ k = 0;
+ i = 2;
+ while ((k < narrays) && (i < (count + 2))) {
+ i++; /* skip attribute field */
+ if (radeon_check_and_fixup_offset(dev_priv, filp_priv, &cmd[i])) {
+ DRM_ERROR
+ ("Invalid offset (k=%d i=%d) in 3D_LOAD_VBPNTR packet.\n",
+ k, i);
+ return DRM_ERR(EINVAL);
+ }
+ k++;
+ i++;
+ if (k == narrays)
+ break;
+ /* have one more to process, they come in pairs */
+ if (radeon_check_and_fixup_offset(dev_priv, filp_priv, &cmd[i])) {
+ DRM_ERROR
+ ("Invalid offset (k=%d i=%d) in 3D_LOAD_VBPNTR packet.\n",
+ k, i);
+ return DRM_ERR(EINVAL);
+ }
+ k++;
+ i++;
+ }
+ /* do the counts match what we expect ? */
+ if ((k != narrays) || (i != (count + 2))) {
+ DRM_ERROR
+ ("Malformed 3D_LOAD_VBPNTR packet (k=%d i=%d narrays=%d count+1=%d).\n",
+ k, i, narrays, count + 1);
+ return DRM_ERR(EINVAL);
+ }
+ break;