Fix nvidia driver to map the dma ring.
Changed cursor location (into 64MB mapped area).

Notes:
Thu Jan 19 11:44:20 EST 2006 rsc
    Thanks.  Nice catch.  I put a slightly different version in.
    Could you check that it still works on your card?
    
    Russ
    


Reference: /n/sources/patch/applied/nvidia-mem
Date: Tue Jan 17 15:49:37 CET 2006
Reviewed-by: rsc

--- /sys/src/9/pc/vganvidia.c	Tue Jan 17 15:47:56 2006
+++ /sys/src/9/pc/vganvidia.c	Tue Jan 17 15:47:52 2006
@@ -189,7 +189,7 @@
 		 * have allocated less storage than aux/vga
 		 * expected.
 		 */
-		tmp = scr->storage - 96*1024;
+		tmp = scr->apsize - 96*1024;
 		p = (void*)((uchar*)scr->vaddr + tmp);
 		vgaxo(Crtx, 0x30, 0x80|(tmp>>17));
 		vgaxo(Crtx, 0x31, (tmp>>11)<<2);
@@ -363,7 +363,7 @@
 
 	pitch = scr->gscreen->width*BY2WD;
 
-	nv.dmabase = (void*)((uchar*)scr->vaddr + scr->storage - 128*1024);
+	nv.dmabase = (void*)vmap(scr->paddr + scr->storage - 128*1024, 128*1024);
 
 	for(i=0; i<SKIPS; i++)
 		nv.dmabase[i] = 0x00000000;