drm/radeon: dump full IB if we hit a packet error

Dump the whole IB if we run into an invalid packet.
This makes things much easier to debug.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=89148

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon_cs.c

@@ -715,6 +715,7 @@ int radeon_cs_packet_parse(struct radeon_cs_parser *p,
 	struct radeon_cs_chunk *ib_chunk = p->chunk_ib;
 	struct radeon_device *rdev = p->rdev;
 	uint32_t header;
+	int ret = 0, i;
 
 	if (idx >= ib_chunk->length_dw) {
 		DRM_ERROR("Can not parse packet at %d after CS end %d !\n",
@@ -743,14 +744,25 @@ int radeon_cs_packet_parse(struct radeon_cs_parser *p,
 		break;
 	default:
 		DRM_ERROR("Unknown packet type %d at %d !\n", pkt->type, idx);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto dump_ib;
 	}
 	if ((pkt->count + 1 + pkt->idx) >= ib_chunk->length_dw) {
 		DRM_ERROR("Packet (%d:%d:%d) end after CS buffer (%d) !\n",
 			  pkt->idx, pkt->type, pkt->count, ib_chunk->length_dw);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto dump_ib;
 	}
 	return 0;
+
+dump_ib:
+	for (i = 0; i < ib_chunk->length_dw; i++) {
+		if (i == idx)
+			printk("\t0x%08x <---\n", radeon_get_ib_value(p, i));
+		else
+			printk("\t0x%08x\n", radeon_get_ib_value(p, i));
+	}
+	return ret;
 }
 
 /**

drivers/gpu/drm/radeon/si.c

@@ -4699,12 +4699,6 @@ int si_ib_parse(struct radeon_device *rdev, struct radeon_ib *ib)
 		switch (pkt.type) {
 		case RADEON_PACKET_TYPE0:
 			dev_err(rdev->dev, "Packet0 not allowed!\n");
-			for (i = 0; i < ib->length_dw; i++) {
-				if (i == idx)
-					printk("\t0x%08x <---\n", ib->ptr[i]);
-				else
-					printk("\t0x%08x\n", ib->ptr[i]);
-			}
 			ret = -EINVAL;
 			break;
 		case RADEON_PACKET_TYPE2:
@@ -4736,8 +4730,15 @@ int si_ib_parse(struct radeon_device *rdev, struct radeon_ib *ib)
 			ret = -EINVAL;
 			break;
 		}
-		if (ret)
+		if (ret) {
+			for (i = 0; i < ib->length_dw; i++) {
+				if (i == idx)
+					printk("\t0x%08x <---\n", ib->ptr[i]);
+				else
+					printk("\t0x%08x\n", ib->ptr[i]);
+			}
 			break;
+		}
 	} while (idx < ib->length_dw);
 
 	return ret;