drm/nv50: Improve PGRAPH interrupt handling.
This makes nouveau recognise and report more kinds of PGRAPH errors, as
well as prevent GPU lockups resulting from some of them.
Lots of guesswork was involved and some part of this is probably
incorrect. Some potential-lockuop situations are handled by just
resetting a whole PGRAPH subunit, which doesn't sound like a "proper"
solution, but seems to work just fine... for now.
Signed-off-by: Marcin Kościelnicki <koriakin@0x04.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nv50_graph.c b/drivers/gpu/drm/nouveau/nv50_graph.c
index 08d87b7..c62b33a 100644
--- a/drivers/gpu/drm/nouveau/nv50_graph.c
+++ b/drivers/gpu/drm/nouveau/nv50_graph.c
@@ -56,6 +56,10 @@
static void
nv50_graph_init_regs__nv(struct drm_device *dev)
{
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
+ uint32_t units = nv_rd32(dev, 0x1540);
+ int i;
+
NV_DEBUG(dev, "\n");
nv_wr32(dev, 0x400804, 0xc0000000);
@@ -65,6 +69,20 @@
nv_wr32(dev, 0x405018, 0xc0000000);
nv_wr32(dev, 0x402000, 0xc0000000);
+ for (i = 0; i < 16; i++) {
+ if (units & 1 << i) {
+ if (dev_priv->chipset < 0xa0) {
+ nv_wr32(dev, 0x408900 + (i << 12), 0xc0000000);
+ nv_wr32(dev, 0x408e08 + (i << 12), 0xc0000000);
+ nv_wr32(dev, 0x408314 + (i << 12), 0xc0000000);
+ } else {
+ nv_wr32(dev, 0x408600 + (i << 11), 0xc0000000);
+ nv_wr32(dev, 0x408708 + (i << 11), 0xc0000000);
+ nv_wr32(dev, 0x40831c + (i << 11), 0xc0000000);
+ }
+ }
+ }
+
nv_wr32(dev, 0x400108, 0xffffffff);
nv_wr32(dev, 0x400824, 0x00004000);