[PATCH v5 15/16] driver/edac: enable Hygon support to AMD64 EDAC driver

[Pu Wen]

To make AMD64 EDAC and MCE drivers working on Hygon platforms, add
support for Hygon by using the code path of AMD family 0x17.

As Hygon will negotiate with AMD to make sure that only Hygon will
use family 0x18, under this consideration try to minimize code
modifications and share most codes with AMD.

Also Hygon PCI Device ID DF_F0/DF_F6(0x1460/0x1466) of Host bridges
is needed for edac driver.

Signed-off-by: Pu Wen <puwen@xxxxxxxx>
---
 drivers/edac/amd64_edac.c | 20 +++++++++++++++++++-
 drivers/edac/amd64_edac.h |  4 ++++
 drivers/edac/mce_amd.c    |  4 +++-
 3 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 18aeabb..d8b4b0e 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -211,7 +211,7 @@ static int __set_scrub_rate(struct amd64_pvt *pvt, u32 new_bw, u32 min_rate)
 
 	scrubval = scrubrates[i].scrubval;
 
-	if (pvt->fam == 0x17) {
+	if (pvt->fam == 0x17 || pvt->fam == 0x18) {
 		__f17h_set_scrubval(pvt, scrubval);
 	} else if (pvt->fam == 0x15 && pvt->model == 0x60) {
 		f15h_select_dct(pvt, 0);
@@ -264,6 +264,7 @@ static int get_scrub_rate(struct mem_ctl_info *mci)
 		break;
 
 	case 0x17:
+	case 0x18:
 		amd64_read_pci_cfg(pvt->F6, F17H_SCR_BASE_ADDR, &scrubval);
 		if (scrubval & BIT(0)) {
 			amd64_read_pci_cfg(pvt->F6, F17H_SCR_LIMIT_ADDR, &scrubval);
@@ -1044,6 +1045,7 @@ static void determine_memory_type(struct amd64_pvt *pvt)
 		goto ddr3;
 
 	case 0x17:
+	case 0x18:
 		if ((pvt->umc[0].dimm_cfg | pvt->umc[1].dimm_cfg) & BIT(5))
 			pvt->dram_type = MEM_LRDDR4;
 		else if ((pvt->umc[0].dimm_cfg | pvt->umc[1].dimm_cfg) & BIT(4))
@@ -2200,6 +2202,16 @@ static struct amd64_family_type family_types[] = {
 			.dbam_to_cs		= f17_base_addr_to_cs_size,
 		}
 	},
+	[HYGON_F18_CPUS] = {
+		/* Hygon F18h uses the same AMD F17h support */
+		.ctl_name = "Hygon_F18h",
+		.f0_id = PCI_DEVICE_ID_HYGON_18H_DF_F0,
+		.f6_id = PCI_DEVICE_ID_HYGON_18H_DF_F6,
+		.ops = {
+			.early_channel_count	= f17_early_channel_count,
+			.dbam_to_cs		= f17_base_addr_to_cs_size,
+		}
+	},
 };
 
 /*
@@ -3192,6 +3204,11 @@ static struct amd64_family_type *per_family_init(struct amd64_pvt *pvt)
 		pvt->ops	= &family_types[F17_CPUS].ops;
 		break;
 
+	case 0x18:
+		fam_type	= &family_types[HYGON_F18_CPUS];
+		pvt->ops	= &family_types[HYGON_F18_CPUS].ops;
+		break;
+
 	default:
 		amd64_err("Unsupported family!\n");
 		return NULL;
@@ -3428,6 +3445,7 @@ static const struct x86_cpu_id amd64_cpuids[] = {
 	{ X86_VENDOR_AMD, 0x15, X86_MODEL_ANY,	X86_FEATURE_ANY, 0 },
 	{ X86_VENDOR_AMD, 0x16, X86_MODEL_ANY,	X86_FEATURE_ANY, 0 },
 	{ X86_VENDOR_AMD, 0x17, X86_MODEL_ANY,	X86_FEATURE_ANY, 0 },
+	{ X86_VENDOR_HYGON, 0x18, X86_MODEL_ANY, X86_FEATURE_ANY, 0 },
 	{ }
 };
 MODULE_DEVICE_TABLE(x86cpu, amd64_cpuids);
diff --git a/drivers/edac/amd64_edac.h b/drivers/edac/amd64_edac.h
index 1d4b74e..6e5f609 100644
--- a/drivers/edac/amd64_edac.h
+++ b/drivers/edac/amd64_edac.h
@@ -116,6 +116,9 @@
 #define PCI_DEVICE_ID_AMD_17H_DF_F0	0x1460
 #define PCI_DEVICE_ID_AMD_17H_DF_F6	0x1466
 
+#define PCI_DEVICE_ID_HYGON_18H_DF_F0	0x1460
+#define PCI_DEVICE_ID_HYGON_18H_DF_F6	0x1466
+
 /*
  * Function 1 - Address Map
  */
@@ -281,6 +284,7 @@ enum amd_families {
 	F16_CPUS,
 	F16_M30H_CPUS,
 	F17_CPUS,
+	HYGON_F18_CPUS,
 	NUM_FAMILIES,
 };
 
diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c
index 2ab4d61..c605089 100644
--- a/drivers/edac/mce_amd.c
+++ b/drivers/edac/mce_amd.c
@@ -1059,7 +1059,8 @@ static int __init mce_amd_init(void)
 {
 	struct cpuinfo_x86 *c = &boot_cpu_data;
 
-	if (c->x86_vendor != X86_VENDOR_AMD)
+	if (c->x86_vendor != X86_VENDOR_AMD &&
+	    c->x86_vendor != X86_VENDOR_HYGON)
 		return -ENODEV;
 
 	fam_ops = kzalloc(sizeof(struct amd_decoder_ops), GFP_KERNEL);
@@ -1113,6 +1114,7 @@ static int __init mce_amd_init(void)
 		break;
 
 	case 0x17:
+	case 0x18:
 		xec_mask = 0x3f;
 		if (!boot_cpu_has(X86_FEATURE_SMCA)) {
 			printk(KERN_WARNING "Decoding supported only on Scalable MCA processors.\n");
-- 
2.7.4