[PATCH 2/2] MCE, AMD: MCE decoding support for AMD Family 16h

[Jacob Shin <jacob.shin@amd.com>]

Add MCE decoding logic for AMD Family 16h processors.

Signed-off-by: Jacob Shin <jacob.shin@amd.com>
---
 drivers/edac/mce_amd.c |   83 +++++++++++++++++++++++++++++++++++++++++-------
 drivers/edac/mce_amd.h |    3 ++
 2 files changed, 75 insertions(+), 11 deletions(-)

diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c
index e4752be..ce4c8b7 100644
--- a/drivers/edac/mce_amd.c
+++ b/drivers/edac/mce_amd.c
@@ -64,6 +64,10 @@ EXPORT_SYMBOL_GPL(to_msgs);
 const char * const ii_msgs[] = { "MEM", "RESV", "IO", "GEN" };
 EXPORT_SYMBOL_GPL(ii_msgs);
 
+/* internal error type */
+const char * const uu_msgs[] = { "RESV", "RESV", "HWA", "RESV" };
+EXPORT_SYMBOL_GPL(uu_msgs);
+
 static const char * const f15h_mc1_mce_desc[] = {
 	"UC during a demand linefill from L2",
 	"Parity error during data load from IC",
@@ -176,7 +180,7 @@ static bool k8_mc0_mce(u16 ec, u8 xec)
 	return f10h_mc0_mce(ec, xec);
 }
 
-static bool f14h_mc0_mce(u16 ec, u8 xec)
+static bool cat_mc0_mce(u16 ec, u8 xec)
 {
 	u8 r4	 = R4(ec);
 	bool ret = true;
@@ -330,22 +334,27 @@ static bool k8_mc1_mce(u16 ec, u8 xec)
 	return ret;
 }
 
-static bool f14h_mc1_mce(u16 ec, u8 xec)
+static bool cat_mc1_mce(u16 ec, u8 xec)
 {
 	u8 r4    = R4(ec);
 	bool ret = true;
 
 	if (MEM_ERROR(ec)) {
-		if (TT(ec) != 0 || LL(ec) != 1)
+		if (TT(ec) != TT_INSTR)
 			ret = false;
-
-		if (r4 == R4_IRD)
+		else if (r4 == R4_IRD)
 			pr_cont("Data/tag array parity error for a tag hit.\n");
 		else if (r4 == R4_SNOOP)
 			pr_cont("Tag error during snoop/victimization.\n");
+		else if (xec == 0x0)
+			pr_cont("Tag parity error from victim castout.\n");
+		else if (xec == 0x2)
+			pr_cont("Microcode patch RAM parity error.\n");
 		else
 			ret = false;
-	}
+	} else
+		ret = false;
+
 	return ret;
 }
 
@@ -469,6 +478,47 @@ static bool f15h_mc2_mce(u16 ec, u8 xec)
 	return ret;
 }
 
+static bool f16h_mc2_mce(u16 ec, u8 xec)
+{
+	u8 r4 = R4(ec);
+
+	if (!MEM_ERROR(ec))
+		return false;
+
+	switch (xec) {
+	case 0x04 ... 0x05:
+		pr_cont("%cBUFF parity error.\n", (r4 == R4_RD) ? 'I' : 'O');
+		break;
+
+	case 0x09 ... 0x0b:
+	case 0x0d ... 0x0f:
+		pr_cont("ECC error in L2 tag (%s).\n",
+			((r4 == R4_GEN)   ? "BankReq" :
+			((r4 == R4_SNOOP) ? "Prb"     : "Fill")));
+		break;
+
+	case 0x10 ... 0x19:
+	case 0x1b:
+		pr_cont("ECC error in L2 data array (%s).\n",
+			(((r4 == R4_RD) && !(xec & 0x3)) ? "Hit"  :
+			((r4 == R4_GEN)   ? "Attr" :
+			((r4 == R4_EVICT) ? "Vict" : "Fill"))));
+		break;
+
+	case 0x1c ... 0x1d:
+	case 0x1f:
+		pr_cont("Parity error in L2 attribute bits (%s).\n",
+			((r4 == R4_RD)  ? "Hit"  :
+			((r4 == R4_GEN) ? "Attr" : "Fill")));
+		break;
+
+	default:
+		return false;
+	}
+
+	return true;
+}
+
 static void decode_mc2_mce(struct mce *m)
 {
 	u16 ec = EC(m->status);
@@ -546,7 +596,7 @@ static void decode_mc4_mce(struct mce *m)
 		return;
 
 	case 0x19:
-		if (boot_cpu_data.x86 == 0x15)
+		if (boot_cpu_data.x86 == 0x15 || boot_cpu_data.x86 == 0x16)
 			pr_cont("Compute Unit Data Error.\n");
 		else
 			goto wrong_mc4_mce;
@@ -632,6 +682,10 @@ static void decode_mc6_mce(struct mce *m)
 
 static inline void amd_decode_err_code(u16 ec)
 {
+	if (INT_ERROR(ec)) {
+		pr_emerg(HW_ERR "internal: %s\n", UU_MSG(ec));
+		return;
+	}
 
 	pr_emerg(HW_ERR "cache level: %s", LL_MSG(ec));
 
@@ -736,7 +790,7 @@ int amd_decode_mce(struct notifier_block *nb, unsigned long val, void *data)
 		((m->status & MCI_STATUS_PCC)	? "PCC"	  : "-"),
 		((m->status & MCI_STATUS_ADDRV)	? "AddrV" : "-"));
 
-	if (c->x86 == 0x15)
+	if (c->x86 == 0x15 || c->x86 == 0x16)
 		pr_cont("|%s|%s",
 			((m->status & MCI_STATUS_DEFERRED) ? "Deferred" : "-"),
 			((m->status & MCI_STATUS_POISON)   ? "Poison"   : "-"));
@@ -768,7 +822,7 @@ static int __init mce_amd_init(void)
 	if (c->x86_vendor != X86_VENDOR_AMD)
 		return 0;
 
-	if (c->x86 < 0xf || c->x86 > 0x15)
+	if (c->x86 < 0xf || c->x86 > 0x16)
 		return 0;
 
 	fam_ops = kzalloc(sizeof(struct amd_decoder_ops), GFP_KERNEL);
@@ -802,8 +856,8 @@ static int __init mce_amd_init(void)
 
 	case 0x14:
 		nb_err_cpumask  = 0x3;
-		fam_ops->mc0_mce = f14h_mc0_mce;
-		fam_ops->mc1_mce = f14h_mc1_mce;
+		fam_ops->mc0_mce = cat_mc0_mce;
+		fam_ops->mc1_mce = cat_mc1_mce;
 		fam_ops->mc2_mce = k8_mc2_mce;
 		break;
 
@@ -814,6 +868,13 @@ static int __init mce_amd_init(void)
 		fam_ops->mc2_mce = f15h_mc2_mce;
 		break;
 
+	case 0x16:
+		xec_mask = 0x1f;
+		fam_ops->mc0_mce = cat_mc0_mce;
+		fam_ops->mc1_mce = cat_mc1_mce;
+		fam_ops->mc2_mce = f16h_mc2_mce;
+		break;
+
 	default:
 		printk(KERN_WARNING "Huh? What family is it: 0x%x?!\n", c->x86);
 		kfree(fam_ops);
diff --git a/drivers/edac/mce_amd.h b/drivers/edac/mce_amd.h
index 000f6e2..2828908 100644
--- a/drivers/edac/mce_amd.h
+++ b/drivers/edac/mce_amd.h
@@ -14,6 +14,7 @@
 #define TLB_ERROR(x)			(((x) & 0xFFF0) == 0x0010)
 #define MEM_ERROR(x)			(((x) & 0xFF00) == 0x0100)
 #define BUS_ERROR(x)			(((x) & 0xF800) == 0x0800)
+#define INT_ERROR(x)			(((x) & 0xF4FF) == 0x0400)
 
 #define TT(x)				(((x) >> 2) & 0x3)
 #define TT_MSG(x)			tt_msgs[TT(x)]
@@ -25,6 +26,8 @@
 #define TO_MSG(x)			to_msgs[TO(x)]
 #define PP(x)				(((x) >> 9) & 0x3)
 #define PP_MSG(x)			pp_msgs[PP(x)]
+#define UU(x)				(((x) >> 8) & 0x3)
+#define UU_MSG(x)			uu_msgs[UU(x)]
 
 #define R4(x)				(((x) >> 4) & 0xf)
 #define R4_MSG(x)			((R4(x) < 9) ?  rrrr_msgs[R4(x)] : "Wrong R4!")
-- 
1.7.9.5