From: Ben Skeggs <bskeggs@redhat.com>
Date: Tue, 4 Dec 2012 05:25:28 +0000 (+1000)
Subject: drm/nvc0/bus: report useful data on mmio fault
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=382b5bbb4a1ef96be863b71593d23968308b6d24;p=deliverable%2Flinux.git

drm/nvc0/bus: report useful data on mmio fault

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
---

diff --git a/drivers/gpu/drm/nouveau/core/subdev/bus/nvc0.c b/drivers/gpu/drm/nouveau/core/subdev/bus/nvc0.c
index 10d95f5b2d74..b192d6246363 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/bus/nvc0.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/bus/nvc0.c
@@ -36,12 +36,17 @@ nvc0_bus_intr(struct nouveau_subdev *subdev)
 	u32 stat = nv_rd32(pbus, 0x001100) & nv_rd32(pbus, 0x001140);
 
 	if (stat & 0x0000000e) {
-		nv_error(pbus, "MMIO FAULT [");
-		if (stat & 0x00000002) pr_cont(" !ENGINE");
-		if (stat & 0x00000004) pr_cont(" IBUS");
-		if (stat & 0x00000004) pr_cont(" TIMEOUT");
-		pr_cont("]\n");
+		u32 addr = nv_rd32(pbus, 0x009084);
+		u32 data = nv_rd32(pbus, 0x009088);
 
+		nv_error(pbus, "MMIO %s of 0x%08x FAULT at 0x%06x [ %s%s%s]\n",
+			 (addr & 0x00000002) ? "write" : "read", data,
+			 (addr & 0x00fffffc),
+			 (stat & 0x00000002) ? "!ENGINE " : "",
+			 (stat & 0x00000004) ? "IBUS " : "",
+			 (stat & 0x00000008) ? "TIMEOUT " : "");
+
+		nv_wr32(pbus, 0x009084, 0x00000000);
 		nv_wr32(pbus, 0x001100, (stat & 0x0000000e));
 		stat &= ~0x0000000e;
 	}