+ BEGIN_RING(chan, tesla, NV50TCL_CB_ADDR, 2);
+ OUT_RING (chan, NV50_CB_AUX | (24 << 8));
+ OUT_RING (chan, startInstance);
+ while (instanceCount--) {
+ if (AVAIL_RING(chan) < (7 + 16*3)) {
+ FIRE_RING(chan);
+ if (!nv50_state_validate(nv50, 10 + 16*3)) {
+ assert(0);
+ return;
+ }
+ }
+ instance_step(nv50, a);
+
+ BEGIN_RING(chan, tesla, NV50TCL_VERTEX_BEGIN, 1);
+ OUT_RING (chan, prim);
+ if (indexSize == 4) {
+ BEGIN_RING(chan, tesla, NV50TCL_VB_ELEMENT_U32 | 0x30000, 0);
+ OUT_RING (chan, count);
+ nouveau_pushbuf_submit(chan, nouveau_bo(indexBuffer),
+ start << 2, count << 2);
+ } else
+ if (indexSize == 2) {
+ unsigned vb_start = (start & ~1);
+ unsigned vb_end = (start + count + 1) & ~1;
+ unsigned dwords = (vb_end - vb_start) >> 1;
+
+ BEGIN_RING(chan, tesla, NV50TCL_VB_ELEMENT_U16_SETUP, 1);
+ OUT_RING (chan, ((start & 1) << 31) | count);
+ BEGIN_RING(chan, tesla, NV50TCL_VB_ELEMENT_U16 | 0x30000, 0);
+ OUT_RING (chan, dwords);
+ nouveau_pushbuf_submit(chan, nouveau_bo(indexBuffer),
+ vb_start << 1, dwords << 2);
+ BEGIN_RING(chan, tesla, NV50TCL_VB_ELEMENT_U16_SETUP, 1);
+ OUT_RING (chan, 0);
+ }
+ BEGIN_RING(chan, tesla, NV50TCL_VERTEX_END, 1);
+ OUT_RING (chan, 0);