EDAC/amd64: Generate ctl_name string at runtime

Currently, the ctl_name string is statically assigned based on the family and
model of the SOC when the amd64_edac module is loaded.

The same, however, is not exactly needed as the string can be generated and
assigned at runtime through scnprintf().

Remove all static assignments and generate the string at runtime. Also,
cleanup the switch cases which became defunct and consolidate identical cases.

Signed-off-by: Avadhut Naik <avadhut.naik@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/20251106015727.1987246-1-avadhut.naik@amd.com

Author: Avadhut Naik

drivers/edac/amd64_edac.c

@@ -3766,6 +3766,7 @@ static int per_family_init(struct amd64_pvt *pvt)
 	pvt->stepping	= boot_cpu_data.x86_stepping;
 	pvt->model	= boot_cpu_data.x86_model;
 	pvt->fam	= boot_cpu_data.x86;
+	char *tmp_name = NULL;
 	pvt->max_mcs	= 2;
 
 	/*
@@ -3779,7 +3780,7 @@ static int per_family_init(struct amd64_pvt *pvt)
 
 	switch (pvt->fam) {
 	case 0xf:
-		pvt->ctl_name				= (pvt->ext_model >= K8_REV_F) ?
+		tmp_name				= (pvt->ext_model >= K8_REV_F) ?
 							  "K8 revF or later" : "K8 revE or earlier";
 		pvt->f1_id				= PCI_DEVICE_ID_AMD_K8_NB_ADDRMAP;
 		pvt->f2_id				= PCI_DEVICE_ID_AMD_K8_NB_MEMCTL;
@@ -3788,7 +3789,6 @@ static int per_family_init(struct amd64_pvt *pvt)
 		break;
 
 	case 0x10:
-		pvt->ctl_name				= "F10h";
 		pvt->f1_id				= PCI_DEVICE_ID_AMD_10H_NB_MAP;
 		pvt->f2_id				= PCI_DEVICE_ID_AMD_10H_NB_DRAM;
 		pvt->ops->dbam_to_cs			= f10_dbam_to_chip_select;
@@ -3797,12 +3797,10 @@ static int per_family_init(struct amd64_pvt *pvt)
 	case 0x15:
 		switch (pvt->model) {
 		case 0x30:
-			pvt->ctl_name			= "F15h_M30h";
 			pvt->f1_id			= PCI_DEVICE_ID_AMD_15H_M30H_NB_F1;
 			pvt->f2_id			= PCI_DEVICE_ID_AMD_15H_M30H_NB_F2;
 			break;
 		case 0x60:
-			pvt->ctl_name			= "F15h_M60h";
 			pvt->f1_id			= PCI_DEVICE_ID_AMD_15H_M60H_NB_F1;
 			pvt->f2_id			= PCI_DEVICE_ID_AMD_15H_M60H_NB_F2;
 			pvt->ops->dbam_to_cs		= f15_m60h_dbam_to_chip_select;
@@ -3811,7 +3809,6 @@ static int per_family_init(struct amd64_pvt *pvt)
 			/* Richland is only client */
 			return -ENODEV;
 		default:
-			pvt->ctl_name			= "F15h";
 			pvt->f1_id			= PCI_DEVICE_ID_AMD_15H_NB_F1;
 			pvt->f2_id			= PCI_DEVICE_ID_AMD_15H_NB_F2;
 			pvt->ops->dbam_to_cs		= f15_dbam_to_chip_select;
@@ -3822,12 +3819,10 @@ static int per_family_init(struct amd64_pvt *pvt)
 	case 0x16:
 		switch (pvt->model) {
 		case 0x30:
-			pvt->ctl_name			= "F16h_M30h";
 			pvt->f1_id			= PCI_DEVICE_ID_AMD_16H_M30H_NB_F1;
 			pvt->f2_id			= PCI_DEVICE_ID_AMD_16H_M30H_NB_F2;
 			break;
 		default:
-			pvt->ctl_name			= "F16h";
 			pvt->f1_id			= PCI_DEVICE_ID_AMD_16H_NB_F1;
 			pvt->f2_id			= PCI_DEVICE_ID_AMD_16H_NB_F2;
 			break;
@@ -3836,76 +3831,51 @@ static int per_family_init(struct amd64_pvt *pvt)
 
 	case 0x17:
 		switch (pvt->model) {
-		case 0x10 ... 0x2f:
-			pvt->ctl_name			= "F17h_M10h";
-			break;
 		case 0x30 ... 0x3f:
-			pvt->ctl_name			= "F17h_M30h";
 			pvt->max_mcs			= 8;
 			break;
-		case 0x60 ... 0x6f:
-			pvt->ctl_name			= "F17h_M60h";
-			break;
-		case 0x70 ... 0x7f:
-			pvt->ctl_name			= "F17h_M70h";
-			break;
 		default:
-			pvt->ctl_name			= "F17h";
 			break;
 		}
 		break;
 
 	case 0x18:
-		pvt->ctl_name				= "F18h";
 		break;
 
 	case 0x19:
 		switch (pvt->model) {
 		case 0x00 ... 0x0f:
-			pvt->ctl_name			= "F19h";
 			pvt->max_mcs			= 8;
 			break;
 		case 0x10 ... 0x1f:
-			pvt->ctl_name			= "F19h_M10h";
 			pvt->max_mcs			= 12;
 			pvt->flags.zn_regs_v2		= 1;
 			break;
-		case 0x20 ... 0x2f:
-			pvt->ctl_name			= "F19h_M20h";
-			break;
 		case 0x30 ... 0x3f:
 			if (pvt->F3->device == PCI_DEVICE_ID_AMD_MI200_DF_F3) {
-				pvt->ctl_name		= "MI200";
+				tmp_name			= "MI200";
 				pvt->max_mcs		= 4;
 				pvt->dram_type		= MEM_HBM2;
 				pvt->gpu_umc_base	= 0x50000;
 				pvt->ops		= &gpu_ops;
 			} else {
-				pvt->ctl_name		= "F19h_M30h";
 				pvt->max_mcs		= 8;
 			}
 			break;
-		case 0x50 ... 0x5f:
-			pvt->ctl_name			= "F19h_M50h";
-			break;
 		case 0x60 ... 0x6f:
-			pvt->ctl_name			= "F19h_M60h";
 			pvt->flags.zn_regs_v2		= 1;
 			break;
 		case 0x70 ... 0x7f:
-			pvt->ctl_name			= "F19h_M70h";
 			pvt->max_mcs			= 4;
 			pvt->flags.zn_regs_v2		= 1;
 			break;
 		case 0x90 ... 0x9f:
-			pvt->ctl_name			= "F19h_M90h";
 			pvt->max_mcs			= 4;
 			pvt->dram_type			= MEM_HBM3;
 			pvt->gpu_umc_base		= 0x90000;
 			pvt->ops			= &gpu_ops;
 			break;
 		case 0xa0 ... 0xaf:
-			pvt->ctl_name			= "F19h_MA0h";
 			pvt->max_mcs			= 12;
 			pvt->flags.zn_regs_v2		= 1;
 			break;
@@ -3915,34 +3885,22 @@ static int per_family_init(struct amd64_pvt *pvt)
 	case 0x1A:
 		switch (pvt->model) {
 		case 0x00 ... 0x1f:
-			pvt->ctl_name           = "F1Ah";
 			pvt->max_mcs            = 12;
 			pvt->flags.zn_regs_v2   = 1;
 			break;
 		case 0x40 ... 0x4f:
-			pvt->ctl_name           = "F1Ah_M40h";
 			pvt->flags.zn_regs_v2   = 1;
 			break;
 		case 0x50 ... 0x57:
-			pvt->ctl_name           = "F1Ah_M50h";
+		case 0xc0 ... 0xc7:
 			pvt->max_mcs            = 16;
 			pvt->flags.zn_regs_v2   = 1;
 			break;
 		case 0x90 ... 0x9f:
-			pvt->ctl_name           = "F1Ah_M90h";
-			pvt->max_mcs            = 8;
-			pvt->flags.zn_regs_v2   = 1;
-			break;
 		case 0xa0 ... 0xaf:
-			pvt->ctl_name           = "F1Ah_MA0h";
 			pvt->max_mcs            = 8;
 			pvt->flags.zn_regs_v2   = 1;
 			break;
-		case 0xc0 ... 0xc7:
-			pvt->ctl_name           = "F1Ah_MC0h";
-			pvt->max_mcs            = 16;
-			pvt->flags.zn_regs_v2   = 1;
-			break;
 		}
 		break;
 
@@ -3951,6 +3909,12 @@ static int per_family_init(struct amd64_pvt *pvt)
 		return -ENODEV;
 	}
 
+	if (tmp_name)
+		scnprintf(pvt->ctl_name, sizeof(pvt->ctl_name), tmp_name);
+	else
+		scnprintf(pvt->ctl_name, sizeof(pvt->ctl_name), "F%02Xh_M%02Xh",
+			  pvt->fam, pvt->model);
+
 	return 0;
 }
 

drivers/edac/amd64_edac.h

@@ -101,6 +101,8 @@
 #define ON true
 #define OFF false
 
+#define MAX_CTL_NAMELEN	19
+
 /*
  * PCI-defined configuration space registers
  */
@@ -362,7 +364,7 @@ struct amd64_pvt {
 	/* x4, x8, or x16 syndromes in use */
 	u8 ecc_sym_sz;
 
-	const char *ctl_name;
+	char ctl_name[MAX_CTL_NAMELEN];
 	u16 f1_id, f2_id;
 	/* Maximum number of memory controllers per die/node. */
 	u8 max_mcs;