drm/nv50: decode vm faults some more

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

drivers/gpu/drm/nouveau/nv50_fb.c

@@ -114,12 +114,109 @@ nv50_fb_takedown(struct drm_device *dev)
 	nv50_fb_destroy(dev);
 }
 
+static struct nouveau_enum vm_dispatch_subclients[] = {
+	{ 0x00000000, "GRCTX", NULL },
+	{ 0x00000001, "NOTIFY", NULL },
+	{ 0x00000002, "QUERY", NULL },
+	{ 0x00000003, "COND", NULL },
+	{ 0x00000004, "M2M_IN", NULL },
+	{ 0x00000005, "M2M_OUT", NULL },
+	{ 0x00000006, "M2M_NOTIFY", NULL },
+	{}
+};
+
+static struct nouveau_enum vm_ccache_subclients[] = {
+	{ 0x00000000, "CB", NULL },
+	{ 0x00000001, "TIC", NULL },
+	{ 0x00000002, "TSC", NULL },
+	{}
+};
+
+static struct nouveau_enum vm_prop_subclients[] = {
+	{ 0x00000000, "RT0", NULL },
+	{ 0x00000001, "RT1", NULL },
+	{ 0x00000002, "RT2", NULL },
+	{ 0x00000003, "RT3", NULL },
+	{ 0x00000004, "RT4", NULL },
+	{ 0x00000005, "RT5", NULL },
+	{ 0x00000006, "RT6", NULL },
+	{ 0x00000007, "RT7", NULL },
+	{ 0x00000008, "ZETA", NULL },
+	{ 0x00000009, "LOCAL", NULL },
+	{ 0x0000000a, "GLOBAL", NULL },
+	{ 0x0000000b, "STACK", NULL },
+	{ 0x0000000c, "DST2D", NULL },
+	{}
+};
+
+static struct nouveau_enum vm_pfifo_subclients[] = {
+	{ 0x00000000, "PUSHBUF", NULL },
+	{ 0x00000001, "SEMAPHORE", NULL },
+	{}
+};
+
+static struct nouveau_enum vm_bar_subclients[] = {
+	{ 0x00000000, "FB", NULL },
+	{ 0x00000001, "IN", NULL },
+	{}
+};
+
+static struct nouveau_enum vm_client[] = {
+	{ 0x00000000, "STRMOUT", NULL },
+	{ 0x00000003, "DISPATCH", vm_dispatch_subclients },
+	{ 0x00000004, "PFIFO_WRITE", NULL },
+	{ 0x00000005, "CCACHE", vm_ccache_subclients },
+	{ 0x00000006, "PPPP", NULL },
+	{ 0x00000007, "CLIPID", NULL },
+	{ 0x00000008, "PFIFO_READ", NULL },
+	{ 0x00000009, "VFETCH", NULL },
+	{ 0x0000000a, "TEXTURE", NULL },
+	{ 0x0000000b, "PROP", vm_prop_subclients },
+	{ 0x0000000c, "PVP", NULL },
+	{ 0x0000000d, "PBSP", NULL },
+	{ 0x0000000e, "PCRYPT", NULL },
+	{ 0x0000000f, "PCOUNTER", NULL },
+	{ 0x00000011, "PDAEMON", NULL },
+	{}
+};
+
+static struct nouveau_enum vm_engine[] = {
+	{ 0x00000000, "PGRAPH", NULL },
+	{ 0x00000001, "PVP", NULL },
+	{ 0x00000004, "PEEPHOLE", NULL },
+	{ 0x00000005, "PFIFO", vm_pfifo_subclients },
+	{ 0x00000006, "BAR", vm_bar_subclients },
+	{ 0x00000008, "PPPP", NULL },
+	{ 0x00000009, "PBSP", NULL },
+	{ 0x0000000a, "PCRYPT", NULL },
+	{ 0x0000000b, "PCOUNTER", NULL },
+	{ 0x0000000c, "SEMAPHORE_BG", NULL },
+	{ 0x0000000d, "PCOPY", NULL },
+	{ 0x0000000e, "PDAEMON", NULL },
+	{}
+};
+
+static struct nouveau_enum vm_fault[] = {
+	{ 0x00000000, "PT_NOT_PRESENT", NULL },
+	{ 0x00000001, "PT_TOO_SHORT", NULL },
+	{ 0x00000002, "PAGE_NOT_PRESENT", NULL },
+	{ 0x00000003, "PAGE_SYSTEM_ONLY", NULL },
+	{ 0x00000004, "PAGE_READ_ONLY", NULL },
+	{ 0x00000006, "NULL_DMAOBJ", NULL },
+	{ 0x00000007, "WRONG_MEMTYPE", NULL },
+	{ 0x0000000b, "VRAM_LIMIT", NULL },
+	{ 0x0000000f, "DMAOBJ_LIMIT", NULL },
+	{}
+};
+
 void
 nv50_fb_vm_trap(struct drm_device *dev, int display, const char *name)
 {
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	const struct nouveau_enum *en, *cl;
 	unsigned long flags;
 	u32 trap[6], idx, chinst;
+	u8 st0, st1, st2, st3;
 	int i, ch;
 
 	idx = nv_rd32(dev, 0x100c90);
@@ -136,8 +233,8 @@ nv50_fb_vm_trap(struct drm_device *dev, int display, const char *name)
 	if (!display)
 		return;
 
+	/* lookup channel id */
 	chinst = (trap[2] << 16) | trap[1];
-
 	spin_lock_irqsave(&dev_priv->channels.lock, flags);
 	for (ch = 0; ch < dev_priv->engine.fifo.channels; ch++) {
 		struct nouveau_channel *chan = dev_priv->channels.ptr[ch];
@@ -150,9 +247,48 @@ nv50_fb_vm_trap(struct drm_device *dev, int display, const char *name)
 	}
 	spin_unlock_irqrestore(&dev_priv->channels.lock, flags);
 
-	NV_INFO(dev, "%s - VM: Trapped %s at %02x%04x%04x status %08x "
-		     "channel %d (0x%08x)\n",
-		name, (trap[5] & 0x100 ? "read" : "write"),
-		trap[5] & 0xff, trap[4] & 0xffff, trap[3] & 0xffff,
-		trap[0], ch, chinst);
+	/* decode status bits into something more useful */
+	if (dev_priv->chipset  < 0xa3 ||
+	    dev_priv->chipset == 0xaa || dev_priv->chipset == 0xac) {
+		st0 = (trap[0] & 0x0000000f) >> 0;
+		st1 = (trap[0] & 0x000000f0) >> 4;
+		st2 = (trap[0] & 0x00000f00) >> 8;
+		st3 = (trap[0] & 0x0000f000) >> 12;
+	} else {
+		st0 = (trap[0] & 0x000000ff) >> 0;
+		st1 = (trap[0] & 0x0000ff00) >> 8;
+		st2 = (trap[0] & 0x00ff0000) >> 16;
+		st3 = (trap[0] & 0xff000000) >> 24;
+	}
+
+	NV_INFO(dev, "VM: trapped %s at 0x%02x%04x%04x on ch %d [0x%08x] ",
+		(trap[5] & 0x00000100) ? "read" : "write",
+		trap[5] & 0xff, trap[4] & 0xffff, trap[3] & 0xffff, ch, chinst);
+
+	en = nouveau_enum_find(vm_engine, st0);
+	if (en)
+		printk("%s/", en->name);
+	else
+		printk("%02x/", st0);
+
+	cl = nouveau_enum_find(vm_client, st2);
+	if (cl)
+		printk("%s/", cl->name);
+	else
+		printk("%02x/", st2);
+
+	if      (cl && cl->data) cl = nouveau_enum_find(cl->data, st3);
+	else if (en && en->data) cl = nouveau_enum_find(en->data, st3);
+	else                     cl = NULL;
+	if (cl)
+		printk("%s", cl->name);
+	else
+		printk("%02x", st3);
+
+	printk(" reason: ");
+	en = nouveau_enum_find(vm_fault, st1);
+	if (en)
+		printk("%s\n", en->name);
+	else
+		printk("0x%08x\n", st1);
 }