EDAC/{skx_common,skx}: Use configuration data, not global macros

Use model-specific configuration data for the number of memory controllers
per socket, channels per memory controller, and DIMMs per channel as
intended, instead of relying on global macros for maximum values.

No functional changes intended.

Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/r/20250731145534.2759334-2-qiuxu.zhuo@intel.com

3 files changed, 30 insertions, 20 deletions

diff --git a/drivers/edac/skx_base.c b/drivers/edac/skx_base.c
index 29897b21fb8e..078ddf95cc6e 100644
--- a/drivers/edac/skx_base.c
+++ b/drivers/edac/skx_base.c
@@ -33,6 +33,15 @@ static unsigned int nvdimm_count;
 #define	MASK26	0x3FFFFFF		/* Mask for 2^26 */
 #define MASK29	0x1FFFFFFF		/* Mask for 2^29 */
 
+static struct res_config skx_cfg = {
+	.type			= SKX,
+	.decs_did		= 0x2016,
+	.busno_cfg_offset	= 0xcc,
+	.ddr_imc_num		= 2,
+	.ddr_chan_num		= 3,
+	.ddr_dimm_num		= 2,
+};
+
 static struct skx_dev *get_skx_dev(struct pci_bus *bus, u8 idx)
 {
 	struct skx_dev *d;
@@ -52,7 +61,7 @@ enum munittype {
 
 struct munit {
 	u16	did;
-	u16	devfn[SKX_NUM_IMC];
+	u16	devfn[2];
 	u8	busidx;
 	u8	per_socket;
 	enum munittype mtype;
@@ -89,11 +98,11 @@ static int get_all_munits(const struct munit *m)
 		if (!pdev)
 			break;
 		ndev++;
-		if (m->per_socket == SKX_NUM_IMC) {
-			for (i = 0; i < SKX_NUM_IMC; i++)
+		if (m->per_socket == skx_cfg.ddr_imc_num) {
+			for (i = 0; i < skx_cfg.ddr_imc_num; i++)
 				if (m->devfn[i] == pdev->devfn)
 					break;
-			if (i == SKX_NUM_IMC)
+			if (i == skx_cfg.ddr_imc_num)
 				goto fail;
 		}
 		d = get_skx_dev(pdev->bus, m->busidx);
@@ -157,12 +166,6 @@ fail:
 	return -ENODEV;
 }
 
-static struct res_config skx_cfg = {
-	.type			= SKX,
-	.decs_did		= 0x2016,
-	.busno_cfg_offset	= 0xcc,
-};
-
 static const struct x86_cpu_id skx_cpuids[] = {
 	X86_MATCH_VFM(INTEL_SKYLAKE_X, &skx_cfg),
 	{ }
@@ -186,11 +189,11 @@ static int skx_get_dimm_config(struct mem_ctl_info *mci, struct res_config *cfg)
 	/* Only the mcmtr on the first channel is effective */
 	pci_read_config_dword(imc->chan[0].cdev, 0x87c, &mcmtr);
 
-	for (i = 0; i < SKX_NUM_CHANNELS; i++) {
+	for (i = 0; i < cfg->ddr_chan_num; i++) {
 		ndimms = 0;
 		pci_read_config_dword(imc->chan[i].cdev, 0x8C, &amap);
 		pci_read_config_dword(imc->chan[i].cdev, 0x400, &mcddrtcfg);
-		for (j = 0; j < SKX_NUM_DIMMS; j++) {
+		for (j = 0; j < cfg->ddr_dimm_num; j++) {
 			dimm = edac_get_dimm(mci, i, j, 0);
 			pci_read_config_dword(imc->chan[i].cdev,
 					      0x80 + 4 * j, &mtr);
@@ -620,6 +623,7 @@ static int __init skx_init(void)
 		return -ENODEV;
 
 	cfg = (struct res_config *)id->driver_data;
+	skx_set_res_cfg(cfg);
 
 	rc = skx_get_hi_lo(0x2034, off, &skx_tolm, &skx_tohm);
 	if (rc)
@@ -652,10 +656,13 @@ static int __init skx_init(void)
 			goto fail;
 
 		edac_dbg(2, "src_id = %d\n", src_id);
-		for (i = 0; i < SKX_NUM_IMC; i++) {
+		for (i = 0; i < cfg->ddr_imc_num; i++) {
 			d->imc[i].mc = mc++;
 			d->imc[i].lmc = i;
 			d->imc[i].src_id = src_id;
+			d->imc[i].num_channels = cfg->ddr_chan_num;
+			d->imc[i].num_dimms    = cfg->ddr_dimm_num;
+
 			rc = skx_register_mci(&d->imc[i], d->imc[i].chan[0].cdev,
 					      "Skylake Socket", EDAC_MOD_STR,
 					      skx_get_dimm_config, cfg);
diff --git a/drivers/edac/skx_common.c b/drivers/edac/skx_common.c
index 39c733dbc5b9..cc7d36cf7f3b 100644
--- a/drivers/edac/skx_common.c
+++ b/drivers/edac/skx_common.c
@@ -320,10 +320,10 @@ static int get_width(u32 mtr)
  */
 int skx_get_all_bus_mappings(struct res_config *cfg, struct list_head **list)
 {
+	int ndev = 0, imc_num = cfg->ddr_imc_num + cfg->hbm_imc_num;
 	struct pci_dev *pdev, *prev;
 	struct skx_dev *d;
 	u32 reg;
-	int ndev = 0;
 
 	prev = NULL;
 	for (;;) {
@@ -354,8 +354,10 @@ int skx_get_all_bus_mappings(struct res_config *cfg, struct list_head **list)
 			d->seg = GET_BITFIELD(reg, 16, 23);
 		}
 
-		edac_dbg(2, "busses: 0x%x, 0x%x, 0x%x, 0x%x\n",
-			 d->bus[0], d->bus[1], d->bus[2], d->bus[3]);
+		d->num_imc = imc_num;
+
+		edac_dbg(2, "busses: 0x%x, 0x%x, 0x%x, 0x%x, imcs %d\n",
+			 d->bus[0], d->bus[1], d->bus[2], d->bus[3], imc_num);
 		list_add_tail(&d->list, &dev_edac_list);
 		prev = pdev;
 
@@ -541,10 +543,10 @@ int skx_register_mci(struct skx_imc *imc, struct pci_dev *pdev,
 
 	/* Allocate a new MC control structure */
 	layers[0].type = EDAC_MC_LAYER_CHANNEL;
-	layers[0].size = NUM_CHANNELS;
+	layers[0].size = imc->num_channels;
 	layers[0].is_virt_csrow = false;
 	layers[1].type = EDAC_MC_LAYER_SLOT;
-	layers[1].size = NUM_DIMMS;
+	layers[1].size = imc->num_dimms;
 	layers[1].is_virt_csrow = true;
 	mci = edac_mc_alloc(imc->mc, ARRAY_SIZE(layers), layers,
 			    sizeof(struct skx_pvt));
@@ -784,7 +786,7 @@ void skx_remove(void)
 
 	list_for_each_entry_safe(d, tmp, &dev_edac_list, list) {
 		list_del(&d->list);
-		for (i = 0; i < NUM_IMC; i++) {
+		for (i = 0; i < d->num_imc; i++) {
 			if (d->imc[i].mci)
 				skx_unregister_mci(&d->imc[i]);
 
@@ -794,7 +796,7 @@ void skx_remove(void)
 			if (d->imc[i].mbase)
 				iounmap(d->imc[i].mbase);
 
-			for (j = 0; j < NUM_CHANNELS; j++) {
+			for (j = 0; j < d->imc[i].num_channels; j++) {
 				if (d->imc[i].chan[j].cdev)
 					pci_dev_put(d->imc[i].chan[j].cdev);
 			}
diff --git a/drivers/edac/skx_common.h b/drivers/edac/skx_common.h
index ec4966f7ea40..3f6007a97267 100644
--- a/drivers/edac/skx_common.h
+++ b/drivers/edac/skx_common.h
@@ -134,6 +134,7 @@ struct skx_dev {
 	struct pci_dev *uracu; /* for i10nm CPU */
 	struct pci_dev *pcu_cr3; /* for HBM memory detection */
 	u32 mcroute;
+	int num_imc;
 	/*
 	 * Some server BIOS may hide certain memory controllers, and the
 	 * EDAC driver skips those hidden memory controllers. However, the