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Diffstat (limited to 'drivers/edac/i10nm_base.c')
-rw-r--r--drivers/edac/i10nm_base.c903
1 files changed, 903 insertions, 0 deletions
diff --git a/drivers/edac/i10nm_base.c b/drivers/edac/i10nm_base.c
new file mode 100644
index 000000000..8af4d2523
--- /dev/null
+++ b/drivers/edac/i10nm_base.c
@@ -0,0 +1,903 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for Intel(R) 10nm server memory controller.
+ * Copyright (c) 2019, Intel Corporation.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <asm/cpu_device_id.h>
+#include <asm/intel-family.h>
+#include <asm/mce.h>
+#include "edac_module.h"
+#include "skx_common.h"
+
+#define I10NM_REVISION "v0.0.5"
+#define EDAC_MOD_STR "i10nm_edac"
+
+/* Debug macros */
+#define i10nm_printk(level, fmt, arg...) \
+ edac_printk(level, "i10nm", fmt, ##arg)
+
+#define I10NM_GET_SCK_BAR(d, reg) \
+ pci_read_config_dword((d)->uracu, 0xd0, &(reg))
+#define I10NM_GET_IMC_BAR(d, i, reg) \
+ pci_read_config_dword((d)->uracu, 0xd8 + (i) * 4, &(reg))
+#define I10NM_GET_SAD(d, offset, i, reg)\
+ pci_read_config_dword((d)->sad_all, (offset) + (i) * 8, &(reg))
+#define I10NM_GET_HBM_IMC_BAR(d, reg) \
+ pci_read_config_dword((d)->uracu, 0xd4, &(reg))
+#define I10NM_GET_CAPID3_CFG(d, reg) \
+ pci_read_config_dword((d)->pcu_cr3, 0x90, &(reg))
+#define I10NM_GET_DIMMMTR(m, i, j) \
+ readl((m)->mbase + ((m)->hbm_mc ? 0x80c : 0x2080c) + \
+ (i) * (m)->chan_mmio_sz + (j) * 4)
+#define I10NM_GET_MCDDRTCFG(m, i) \
+ readl((m)->mbase + ((m)->hbm_mc ? 0x970 : 0x20970) + \
+ (i) * (m)->chan_mmio_sz)
+#define I10NM_GET_MCMTR(m, i) \
+ readl((m)->mbase + ((m)->hbm_mc ? 0xef8 : 0x20ef8) + \
+ (i) * (m)->chan_mmio_sz)
+#define I10NM_GET_AMAP(m, i) \
+ readl((m)->mbase + ((m)->hbm_mc ? 0x814 : 0x20814) + \
+ (i) * (m)->chan_mmio_sz)
+#define I10NM_GET_REG32(m, i, offset) \
+ readl((m)->mbase + (i) * (m)->chan_mmio_sz + (offset))
+#define I10NM_GET_REG64(m, i, offset) \
+ readq((m)->mbase + (i) * (m)->chan_mmio_sz + (offset))
+#define I10NM_SET_REG32(m, i, offset, v) \
+ writel(v, (m)->mbase + (i) * (m)->chan_mmio_sz + (offset))
+
+#define I10NM_GET_SCK_MMIO_BASE(reg) (GET_BITFIELD(reg, 0, 28) << 23)
+#define I10NM_GET_IMC_MMIO_OFFSET(reg) (GET_BITFIELD(reg, 0, 10) << 12)
+#define I10NM_GET_IMC_MMIO_SIZE(reg) ((GET_BITFIELD(reg, 13, 23) - \
+ GET_BITFIELD(reg, 0, 10) + 1) << 12)
+#define I10NM_GET_HBM_IMC_MMIO_OFFSET(reg) \
+ ((GET_BITFIELD(reg, 0, 10) << 12) + 0x140000)
+
+#define I10NM_HBM_IMC_MMIO_SIZE 0x9000
+#define I10NM_IS_HBM_PRESENT(reg) GET_BITFIELD(reg, 27, 30)
+#define I10NM_IS_HBM_IMC(reg) GET_BITFIELD(reg, 29, 29)
+
+#define I10NM_MAX_SAD 16
+#define I10NM_SAD_ENABLE(reg) GET_BITFIELD(reg, 0, 0)
+#define I10NM_SAD_NM_CACHEABLE(reg) GET_BITFIELD(reg, 5, 5)
+
+#define RETRY_RD_ERR_LOG_UC BIT(1)
+#define RETRY_RD_ERR_LOG_NOOVER BIT(14)
+#define RETRY_RD_ERR_LOG_EN BIT(15)
+#define RETRY_RD_ERR_LOG_NOOVER_UC (BIT(14) | BIT(1))
+#define RETRY_RD_ERR_LOG_OVER_UC_V (BIT(2) | BIT(1) | BIT(0))
+
+static struct list_head *i10nm_edac_list;
+
+static struct res_config *res_cfg;
+static int retry_rd_err_log;
+static int decoding_via_mca;
+static bool mem_cfg_2lm;
+
+static u32 offsets_scrub_icx[] = {0x22c60, 0x22c54, 0x22c5c, 0x22c58, 0x22c28, 0x20ed8};
+static u32 offsets_scrub_spr[] = {0x22c60, 0x22c54, 0x22f08, 0x22c58, 0x22c28, 0x20ed8};
+static u32 offsets_scrub_spr_hbm0[] = {0x2860, 0x2854, 0x2b08, 0x2858, 0x2828, 0x0ed8};
+static u32 offsets_scrub_spr_hbm1[] = {0x2c60, 0x2c54, 0x2f08, 0x2c58, 0x2c28, 0x0fa8};
+static u32 offsets_demand_icx[] = {0x22e54, 0x22e60, 0x22e64, 0x22e58, 0x22e5c, 0x20ee0};
+static u32 offsets_demand_spr[] = {0x22e54, 0x22e60, 0x22f10, 0x22e58, 0x22e5c, 0x20ee0};
+static u32 offsets_demand2_spr[] = {0x22c70, 0x22d80, 0x22f18, 0x22d58, 0x22c64, 0x20f10};
+static u32 offsets_demand_spr_hbm0[] = {0x2a54, 0x2a60, 0x2b10, 0x2a58, 0x2a5c, 0x0ee0};
+static u32 offsets_demand_spr_hbm1[] = {0x2e54, 0x2e60, 0x2f10, 0x2e58, 0x2e5c, 0x0fb0};
+
+static void __enable_retry_rd_err_log(struct skx_imc *imc, int chan, bool enable,
+ u32 *offsets_scrub, u32 *offsets_demand,
+ u32 *offsets_demand2)
+{
+ u32 s, d, d2;
+
+ s = I10NM_GET_REG32(imc, chan, offsets_scrub[0]);
+ d = I10NM_GET_REG32(imc, chan, offsets_demand[0]);
+ if (offsets_demand2)
+ d2 = I10NM_GET_REG32(imc, chan, offsets_demand2[0]);
+
+ if (enable) {
+ /* Save default configurations */
+ imc->chan[chan].retry_rd_err_log_s = s;
+ imc->chan[chan].retry_rd_err_log_d = d;
+ if (offsets_demand2)
+ imc->chan[chan].retry_rd_err_log_d2 = d2;
+
+ s &= ~RETRY_RD_ERR_LOG_NOOVER_UC;
+ s |= RETRY_RD_ERR_LOG_EN;
+ d &= ~RETRY_RD_ERR_LOG_NOOVER_UC;
+ d |= RETRY_RD_ERR_LOG_EN;
+
+ if (offsets_demand2) {
+ d2 &= ~RETRY_RD_ERR_LOG_UC;
+ d2 |= RETRY_RD_ERR_LOG_NOOVER;
+ d2 |= RETRY_RD_ERR_LOG_EN;
+ }
+ } else {
+ /* Restore default configurations */
+ if (imc->chan[chan].retry_rd_err_log_s & RETRY_RD_ERR_LOG_UC)
+ s |= RETRY_RD_ERR_LOG_UC;
+ if (imc->chan[chan].retry_rd_err_log_s & RETRY_RD_ERR_LOG_NOOVER)
+ s |= RETRY_RD_ERR_LOG_NOOVER;
+ if (!(imc->chan[chan].retry_rd_err_log_s & RETRY_RD_ERR_LOG_EN))
+ s &= ~RETRY_RD_ERR_LOG_EN;
+ if (imc->chan[chan].retry_rd_err_log_d & RETRY_RD_ERR_LOG_UC)
+ d |= RETRY_RD_ERR_LOG_UC;
+ if (imc->chan[chan].retry_rd_err_log_d & RETRY_RD_ERR_LOG_NOOVER)
+ d |= RETRY_RD_ERR_LOG_NOOVER;
+ if (!(imc->chan[chan].retry_rd_err_log_d & RETRY_RD_ERR_LOG_EN))
+ d &= ~RETRY_RD_ERR_LOG_EN;
+
+ if (offsets_demand2) {
+ if (imc->chan[chan].retry_rd_err_log_d2 & RETRY_RD_ERR_LOG_UC)
+ d2 |= RETRY_RD_ERR_LOG_UC;
+ if (!(imc->chan[chan].retry_rd_err_log_d2 & RETRY_RD_ERR_LOG_NOOVER))
+ d2 &= ~RETRY_RD_ERR_LOG_NOOVER;
+ if (!(imc->chan[chan].retry_rd_err_log_d2 & RETRY_RD_ERR_LOG_EN))
+ d2 &= ~RETRY_RD_ERR_LOG_EN;
+ }
+ }
+
+ I10NM_SET_REG32(imc, chan, offsets_scrub[0], s);
+ I10NM_SET_REG32(imc, chan, offsets_demand[0], d);
+ if (offsets_demand2)
+ I10NM_SET_REG32(imc, chan, offsets_demand2[0], d2);
+}
+
+static void enable_retry_rd_err_log(bool enable)
+{
+ struct skx_imc *imc;
+ struct skx_dev *d;
+ int i, j;
+
+ edac_dbg(2, "\n");
+
+ list_for_each_entry(d, i10nm_edac_list, list)
+ for (i = 0; i < I10NM_NUM_IMC; i++) {
+ imc = &d->imc[i];
+ if (!imc->mbase)
+ continue;
+
+ for (j = 0; j < I10NM_NUM_CHANNELS; j++) {
+ if (imc->hbm_mc) {
+ __enable_retry_rd_err_log(imc, j, enable,
+ res_cfg->offsets_scrub_hbm0,
+ res_cfg->offsets_demand_hbm0,
+ NULL);
+ __enable_retry_rd_err_log(imc, j, enable,
+ res_cfg->offsets_scrub_hbm1,
+ res_cfg->offsets_demand_hbm1,
+ NULL);
+ } else {
+ __enable_retry_rd_err_log(imc, j, enable,
+ res_cfg->offsets_scrub,
+ res_cfg->offsets_demand,
+ res_cfg->offsets_demand2);
+ }
+ }
+ }
+}
+
+static void show_retry_rd_err_log(struct decoded_addr *res, char *msg,
+ int len, bool scrub_err)
+{
+ struct skx_imc *imc = &res->dev->imc[res->imc];
+ u32 log0, log1, log2, log3, log4;
+ u32 corr0, corr1, corr2, corr3;
+ u32 lxg0, lxg1, lxg3, lxg4;
+ u32 *xffsets = NULL;
+ u64 log2a, log5;
+ u64 lxg2a, lxg5;
+ u32 *offsets;
+ int n, pch;
+
+ if (!imc->mbase)
+ return;
+
+ if (imc->hbm_mc) {
+ pch = res->cs & 1;
+
+ if (pch)
+ offsets = scrub_err ? res_cfg->offsets_scrub_hbm1 :
+ res_cfg->offsets_demand_hbm1;
+ else
+ offsets = scrub_err ? res_cfg->offsets_scrub_hbm0 :
+ res_cfg->offsets_demand_hbm0;
+ } else {
+ if (scrub_err) {
+ offsets = res_cfg->offsets_scrub;
+ } else {
+ offsets = res_cfg->offsets_demand;
+ xffsets = res_cfg->offsets_demand2;
+ }
+ }
+
+ log0 = I10NM_GET_REG32(imc, res->channel, offsets[0]);
+ log1 = I10NM_GET_REG32(imc, res->channel, offsets[1]);
+ log3 = I10NM_GET_REG32(imc, res->channel, offsets[3]);
+ log4 = I10NM_GET_REG32(imc, res->channel, offsets[4]);
+ log5 = I10NM_GET_REG64(imc, res->channel, offsets[5]);
+
+ if (xffsets) {
+ lxg0 = I10NM_GET_REG32(imc, res->channel, xffsets[0]);
+ lxg1 = I10NM_GET_REG32(imc, res->channel, xffsets[1]);
+ lxg3 = I10NM_GET_REG32(imc, res->channel, xffsets[3]);
+ lxg4 = I10NM_GET_REG32(imc, res->channel, xffsets[4]);
+ lxg5 = I10NM_GET_REG64(imc, res->channel, xffsets[5]);
+ }
+
+ if (res_cfg->type == SPR) {
+ log2a = I10NM_GET_REG64(imc, res->channel, offsets[2]);
+ n = snprintf(msg, len, " retry_rd_err_log[%.8x %.8x %.16llx %.8x %.8x %.16llx",
+ log0, log1, log2a, log3, log4, log5);
+
+ if (len - n > 0) {
+ if (xffsets) {
+ lxg2a = I10NM_GET_REG64(imc, res->channel, xffsets[2]);
+ n += snprintf(msg + n, len - n, " %.8x %.8x %.16llx %.8x %.8x %.16llx]",
+ lxg0, lxg1, lxg2a, lxg3, lxg4, lxg5);
+ } else {
+ n += snprintf(msg + n, len - n, "]");
+ }
+ }
+ } else {
+ log2 = I10NM_GET_REG32(imc, res->channel, offsets[2]);
+ n = snprintf(msg, len, " retry_rd_err_log[%.8x %.8x %.8x %.8x %.8x %.16llx]",
+ log0, log1, log2, log3, log4, log5);
+ }
+
+ if (imc->hbm_mc) {
+ if (pch) {
+ corr0 = I10NM_GET_REG32(imc, res->channel, 0x2c18);
+ corr1 = I10NM_GET_REG32(imc, res->channel, 0x2c1c);
+ corr2 = I10NM_GET_REG32(imc, res->channel, 0x2c20);
+ corr3 = I10NM_GET_REG32(imc, res->channel, 0x2c24);
+ } else {
+ corr0 = I10NM_GET_REG32(imc, res->channel, 0x2818);
+ corr1 = I10NM_GET_REG32(imc, res->channel, 0x281c);
+ corr2 = I10NM_GET_REG32(imc, res->channel, 0x2820);
+ corr3 = I10NM_GET_REG32(imc, res->channel, 0x2824);
+ }
+ } else {
+ corr0 = I10NM_GET_REG32(imc, res->channel, 0x22c18);
+ corr1 = I10NM_GET_REG32(imc, res->channel, 0x22c1c);
+ corr2 = I10NM_GET_REG32(imc, res->channel, 0x22c20);
+ corr3 = I10NM_GET_REG32(imc, res->channel, 0x22c24);
+ }
+
+ if (len - n > 0)
+ snprintf(msg + n, len - n,
+ " correrrcnt[%.4x %.4x %.4x %.4x %.4x %.4x %.4x %.4x]",
+ corr0 & 0xffff, corr0 >> 16,
+ corr1 & 0xffff, corr1 >> 16,
+ corr2 & 0xffff, corr2 >> 16,
+ corr3 & 0xffff, corr3 >> 16);
+
+ /* Clear status bits */
+ if (retry_rd_err_log == 2) {
+ if (log0 & RETRY_RD_ERR_LOG_OVER_UC_V) {
+ log0 &= ~RETRY_RD_ERR_LOG_OVER_UC_V;
+ I10NM_SET_REG32(imc, res->channel, offsets[0], log0);
+ }
+
+ if (xffsets && (lxg0 & RETRY_RD_ERR_LOG_OVER_UC_V)) {
+ lxg0 &= ~RETRY_RD_ERR_LOG_OVER_UC_V;
+ I10NM_SET_REG32(imc, res->channel, xffsets[0], lxg0);
+ }
+ }
+}
+
+static struct pci_dev *pci_get_dev_wrapper(int dom, unsigned int bus,
+ unsigned int dev, unsigned int fun)
+{
+ struct pci_dev *pdev;
+
+ pdev = pci_get_domain_bus_and_slot(dom, bus, PCI_DEVFN(dev, fun));
+ if (!pdev) {
+ edac_dbg(2, "No device %02x:%02x.%x\n",
+ bus, dev, fun);
+ return NULL;
+ }
+
+ if (unlikely(pci_enable_device(pdev) < 0)) {
+ edac_dbg(2, "Failed to enable device %02x:%02x.%x\n",
+ bus, dev, fun);
+ pci_dev_put(pdev);
+ return NULL;
+ }
+
+ return pdev;
+}
+
+static bool i10nm_check_2lm(struct res_config *cfg)
+{
+ struct skx_dev *d;
+ u32 reg;
+ int i;
+
+ list_for_each_entry(d, i10nm_edac_list, list) {
+ d->sad_all = pci_get_dev_wrapper(d->seg, d->bus[1],
+ PCI_SLOT(cfg->sad_all_devfn),
+ PCI_FUNC(cfg->sad_all_devfn));
+ if (!d->sad_all)
+ continue;
+
+ for (i = 0; i < I10NM_MAX_SAD; i++) {
+ I10NM_GET_SAD(d, cfg->sad_all_offset, i, reg);
+ if (I10NM_SAD_ENABLE(reg) && I10NM_SAD_NM_CACHEABLE(reg)) {
+ edac_dbg(2, "2-level memory configuration.\n");
+ return true;
+ }
+ }
+ }
+
+ return false;
+}
+
+/*
+ * Check whether the error comes from DDRT by ICX/Tremont model specific error code.
+ * Refer to SDM vol3B 16.11.3 Intel IMC MC error codes for IA32_MCi_STATUS.
+ */
+static bool i10nm_mscod_is_ddrt(u32 mscod)
+{
+ switch (mscod) {
+ case 0x0106: case 0x0107:
+ case 0x0800: case 0x0804:
+ case 0x0806 ... 0x0808:
+ case 0x080a ... 0x080e:
+ case 0x0810: case 0x0811:
+ case 0x0816: case 0x081e:
+ case 0x081f:
+ return true;
+ }
+
+ return false;
+}
+
+static bool i10nm_mc_decode_available(struct mce *mce)
+{
+ u8 bank;
+
+ if (!decoding_via_mca || mem_cfg_2lm)
+ return false;
+
+ if ((mce->status & (MCI_STATUS_MISCV | MCI_STATUS_ADDRV))
+ != (MCI_STATUS_MISCV | MCI_STATUS_ADDRV))
+ return false;
+
+ bank = mce->bank;
+
+ switch (res_cfg->type) {
+ case I10NM:
+ if (bank < 13 || bank > 26)
+ return false;
+
+ /* DDRT errors can't be decoded from MCA bank registers */
+ if (MCI_MISC_ECC_MODE(mce->misc) == MCI_MISC_ECC_DDRT)
+ return false;
+
+ if (i10nm_mscod_is_ddrt(MCI_STATUS_MSCOD(mce->status)))
+ return false;
+
+ /* Check whether one of {13,14,17,18,21,22,25,26} */
+ return ((bank - 13) & BIT(1)) == 0;
+ default:
+ return false;
+ }
+}
+
+static bool i10nm_mc_decode(struct decoded_addr *res)
+{
+ struct mce *m = res->mce;
+ struct skx_dev *d;
+ u8 bank;
+
+ if (!i10nm_mc_decode_available(m))
+ return false;
+
+ list_for_each_entry(d, i10nm_edac_list, list) {
+ if (d->imc[0].src_id == m->socketid) {
+ res->socket = m->socketid;
+ res->dev = d;
+ break;
+ }
+ }
+
+ switch (res_cfg->type) {
+ case I10NM:
+ bank = m->bank - 13;
+ res->imc = bank / 4;
+ res->channel = bank % 2;
+ break;
+ default:
+ return false;
+ }
+
+ if (!res->dev) {
+ skx_printk(KERN_ERR, "No device for src_id %d imc %d\n",
+ m->socketid, res->imc);
+ return false;
+ }
+
+ res->column = GET_BITFIELD(m->misc, 9, 18) << 2;
+ res->row = GET_BITFIELD(m->misc, 19, 39);
+ res->bank_group = GET_BITFIELD(m->misc, 40, 41);
+ res->bank_address = GET_BITFIELD(m->misc, 42, 43);
+ res->bank_group |= GET_BITFIELD(m->misc, 44, 44) << 2;
+ res->rank = GET_BITFIELD(m->misc, 56, 58);
+ res->dimm = res->rank >> 2;
+ res->rank = res->rank % 4;
+
+ return true;
+}
+
+static int i10nm_get_ddr_munits(void)
+{
+ struct pci_dev *mdev;
+ void __iomem *mbase;
+ unsigned long size;
+ struct skx_dev *d;
+ int i, j = 0;
+ u32 reg, off;
+ u64 base;
+
+ list_for_each_entry(d, i10nm_edac_list, list) {
+ d->util_all = pci_get_dev_wrapper(d->seg, d->bus[1], 29, 1);
+ if (!d->util_all)
+ return -ENODEV;
+
+ d->uracu = pci_get_dev_wrapper(d->seg, d->bus[0], 0, 1);
+ if (!d->uracu)
+ return -ENODEV;
+
+ if (I10NM_GET_SCK_BAR(d, reg)) {
+ i10nm_printk(KERN_ERR, "Failed to socket bar\n");
+ return -ENODEV;
+ }
+
+ base = I10NM_GET_SCK_MMIO_BASE(reg);
+ edac_dbg(2, "socket%d mmio base 0x%llx (reg 0x%x)\n",
+ j++, base, reg);
+
+ for (i = 0; i < I10NM_NUM_DDR_IMC; i++) {
+ mdev = pci_get_dev_wrapper(d->seg, d->bus[0],
+ 12 + i, 0);
+ if (i == 0 && !mdev) {
+ i10nm_printk(KERN_ERR, "No IMC found\n");
+ return -ENODEV;
+ }
+ if (!mdev)
+ continue;
+
+ d->imc[i].mdev = mdev;
+
+ if (I10NM_GET_IMC_BAR(d, i, reg)) {
+ i10nm_printk(KERN_ERR, "Failed to get mc bar\n");
+ return -ENODEV;
+ }
+
+ off = I10NM_GET_IMC_MMIO_OFFSET(reg);
+ size = I10NM_GET_IMC_MMIO_SIZE(reg);
+ edac_dbg(2, "mc%d mmio base 0x%llx size 0x%lx (reg 0x%x)\n",
+ i, base + off, size, reg);
+
+ mbase = ioremap(base + off, size);
+ if (!mbase) {
+ i10nm_printk(KERN_ERR, "Failed to ioremap 0x%llx\n",
+ base + off);
+ return -ENODEV;
+ }
+
+ d->imc[i].mbase = mbase;
+ }
+ }
+
+ return 0;
+}
+
+static bool i10nm_check_hbm_imc(struct skx_dev *d)
+{
+ u32 reg;
+
+ if (I10NM_GET_CAPID3_CFG(d, reg)) {
+ i10nm_printk(KERN_ERR, "Failed to get capid3_cfg\n");
+ return false;
+ }
+
+ return I10NM_IS_HBM_PRESENT(reg) != 0;
+}
+
+static int i10nm_get_hbm_munits(void)
+{
+ struct pci_dev *mdev;
+ void __iomem *mbase;
+ u32 reg, off, mcmtr;
+ struct skx_dev *d;
+ int i, lmc;
+ u64 base;
+
+ list_for_each_entry(d, i10nm_edac_list, list) {
+ d->pcu_cr3 = pci_get_dev_wrapper(d->seg, d->bus[1], 30, 3);
+ if (!d->pcu_cr3)
+ return -ENODEV;
+
+ if (!i10nm_check_hbm_imc(d)) {
+ i10nm_printk(KERN_DEBUG, "No hbm memory\n");
+ return -ENODEV;
+ }
+
+ if (I10NM_GET_SCK_BAR(d, reg)) {
+ i10nm_printk(KERN_ERR, "Failed to get socket bar\n");
+ return -ENODEV;
+ }
+ base = I10NM_GET_SCK_MMIO_BASE(reg);
+
+ if (I10NM_GET_HBM_IMC_BAR(d, reg)) {
+ i10nm_printk(KERN_ERR, "Failed to get hbm mc bar\n");
+ return -ENODEV;
+ }
+ base += I10NM_GET_HBM_IMC_MMIO_OFFSET(reg);
+
+ lmc = I10NM_NUM_DDR_IMC;
+
+ for (i = 0; i < I10NM_NUM_HBM_IMC; i++) {
+ mdev = pci_get_dev_wrapper(d->seg, d->bus[0],
+ 12 + i / 4, 1 + i % 4);
+ if (i == 0 && !mdev) {
+ i10nm_printk(KERN_ERR, "No hbm mc found\n");
+ return -ENODEV;
+ }
+ if (!mdev)
+ continue;
+
+ d->imc[lmc].mdev = mdev;
+ off = i * I10NM_HBM_IMC_MMIO_SIZE;
+
+ edac_dbg(2, "hbm mc%d mmio base 0x%llx size 0x%x\n",
+ lmc, base + off, I10NM_HBM_IMC_MMIO_SIZE);
+
+ mbase = ioremap(base + off, I10NM_HBM_IMC_MMIO_SIZE);
+ if (!mbase) {
+ pci_dev_put(d->imc[lmc].mdev);
+ d->imc[lmc].mdev = NULL;
+
+ i10nm_printk(KERN_ERR, "Failed to ioremap for hbm mc 0x%llx\n",
+ base + off);
+ return -ENOMEM;
+ }
+
+ d->imc[lmc].mbase = mbase;
+ d->imc[lmc].hbm_mc = true;
+
+ mcmtr = I10NM_GET_MCMTR(&d->imc[lmc], 0);
+ if (!I10NM_IS_HBM_IMC(mcmtr)) {
+ iounmap(d->imc[lmc].mbase);
+ d->imc[lmc].mbase = NULL;
+ d->imc[lmc].hbm_mc = false;
+ pci_dev_put(d->imc[lmc].mdev);
+ d->imc[lmc].mdev = NULL;
+
+ i10nm_printk(KERN_ERR, "This isn't an hbm mc!\n");
+ return -ENODEV;
+ }
+
+ lmc++;
+ }
+ }
+
+ return 0;
+}
+
+static struct res_config i10nm_cfg0 = {
+ .type = I10NM,
+ .decs_did = 0x3452,
+ .busno_cfg_offset = 0xcc,
+ .ddr_chan_mmio_sz = 0x4000,
+ .sad_all_devfn = PCI_DEVFN(29, 0),
+ .sad_all_offset = 0x108,
+ .offsets_scrub = offsets_scrub_icx,
+ .offsets_demand = offsets_demand_icx,
+};
+
+static struct res_config i10nm_cfg1 = {
+ .type = I10NM,
+ .decs_did = 0x3452,
+ .busno_cfg_offset = 0xd0,
+ .ddr_chan_mmio_sz = 0x4000,
+ .sad_all_devfn = PCI_DEVFN(29, 0),
+ .sad_all_offset = 0x108,
+ .offsets_scrub = offsets_scrub_icx,
+ .offsets_demand = offsets_demand_icx,
+};
+
+static struct res_config spr_cfg = {
+ .type = SPR,
+ .decs_did = 0x3252,
+ .busno_cfg_offset = 0xd0,
+ .ddr_chan_mmio_sz = 0x8000,
+ .hbm_chan_mmio_sz = 0x4000,
+ .support_ddr5 = true,
+ .sad_all_devfn = PCI_DEVFN(10, 0),
+ .sad_all_offset = 0x300,
+ .offsets_scrub = offsets_scrub_spr,
+ .offsets_scrub_hbm0 = offsets_scrub_spr_hbm0,
+ .offsets_scrub_hbm1 = offsets_scrub_spr_hbm1,
+ .offsets_demand = offsets_demand_spr,
+ .offsets_demand2 = offsets_demand2_spr,
+ .offsets_demand_hbm0 = offsets_demand_spr_hbm0,
+ .offsets_demand_hbm1 = offsets_demand_spr_hbm1,
+};
+
+static const struct x86_cpu_id i10nm_cpuids[] = {
+ X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(ATOM_TREMONT_D, X86_STEPPINGS(0x0, 0x3), &i10nm_cfg0),
+ X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(ATOM_TREMONT_D, X86_STEPPINGS(0x4, 0xf), &i10nm_cfg1),
+ X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(ICELAKE_X, X86_STEPPINGS(0x0, 0x3), &i10nm_cfg0),
+ X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(ICELAKE_X, X86_STEPPINGS(0x4, 0xf), &i10nm_cfg1),
+ X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(ICELAKE_D, X86_STEPPINGS(0x0, 0xf), &i10nm_cfg1),
+ X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(SAPPHIRERAPIDS_X, X86_STEPPINGS(0x0, 0xf), &spr_cfg),
+ {}
+};
+MODULE_DEVICE_TABLE(x86cpu, i10nm_cpuids);
+
+static bool i10nm_check_ecc(struct skx_imc *imc, int chan)
+{
+ u32 mcmtr;
+
+ mcmtr = I10NM_GET_MCMTR(imc, chan);
+ edac_dbg(1, "ch%d mcmtr reg %x\n", chan, mcmtr);
+
+ return !!GET_BITFIELD(mcmtr, 2, 2);
+}
+
+static int i10nm_get_dimm_config(struct mem_ctl_info *mci,
+ struct res_config *cfg)
+{
+ struct skx_pvt *pvt = mci->pvt_info;
+ struct skx_imc *imc = pvt->imc;
+ u32 mtr, amap, mcddrtcfg;
+ struct dimm_info *dimm;
+ int i, j, ndimms;
+
+ for (i = 0; i < imc->num_channels; i++) {
+ if (!imc->mbase)
+ continue;
+
+ ndimms = 0;
+ amap = I10NM_GET_AMAP(imc, i);
+ mcddrtcfg = I10NM_GET_MCDDRTCFG(imc, i);
+ for (j = 0; j < imc->num_dimms; j++) {
+ dimm = edac_get_dimm(mci, i, j, 0);
+ mtr = I10NM_GET_DIMMMTR(imc, i, j);
+ edac_dbg(1, "dimmmtr 0x%x mcddrtcfg 0x%x (mc%d ch%d dimm%d)\n",
+ mtr, mcddrtcfg, imc->mc, i, j);
+
+ if (IS_DIMM_PRESENT(mtr))
+ ndimms += skx_get_dimm_info(mtr, 0, amap, dimm,
+ imc, i, j, cfg);
+ else if (IS_NVDIMM_PRESENT(mcddrtcfg, j))
+ ndimms += skx_get_nvdimm_info(dimm, imc, i, j,
+ EDAC_MOD_STR);
+ }
+ if (ndimms && !i10nm_check_ecc(imc, i)) {
+ i10nm_printk(KERN_ERR, "ECC is disabled on imc %d channel %d\n",
+ imc->mc, i);
+ return -ENODEV;
+ }
+ }
+
+ return 0;
+}
+
+static struct notifier_block i10nm_mce_dec = {
+ .notifier_call = skx_mce_check_error,
+ .priority = MCE_PRIO_EDAC,
+};
+
+#ifdef CONFIG_EDAC_DEBUG
+/*
+ * Debug feature.
+ * Exercise the address decode logic by writing an address to
+ * /sys/kernel/debug/edac/i10nm_test/addr.
+ */
+static struct dentry *i10nm_test;
+
+static int debugfs_u64_set(void *data, u64 val)
+{
+ struct mce m;
+
+ pr_warn_once("Fake error to 0x%llx injected via debugfs\n", val);
+
+ memset(&m, 0, sizeof(m));
+ /* ADDRV + MemRd + Unknown channel */
+ m.status = MCI_STATUS_ADDRV + 0x90;
+ /* One corrected error */
+ m.status |= BIT_ULL(MCI_STATUS_CEC_SHIFT);
+ m.addr = val;
+ skx_mce_check_error(NULL, 0, &m);
+
+ return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(fops_u64_wo, NULL, debugfs_u64_set, "%llu\n");
+
+static void setup_i10nm_debug(void)
+{
+ i10nm_test = edac_debugfs_create_dir("i10nm_test");
+ if (!i10nm_test)
+ return;
+
+ if (!edac_debugfs_create_file("addr", 0200, i10nm_test,
+ NULL, &fops_u64_wo)) {
+ debugfs_remove(i10nm_test);
+ i10nm_test = NULL;
+ }
+}
+
+static void teardown_i10nm_debug(void)
+{
+ debugfs_remove_recursive(i10nm_test);
+}
+#else
+static inline void setup_i10nm_debug(void) {}
+static inline void teardown_i10nm_debug(void) {}
+#endif /*CONFIG_EDAC_DEBUG*/
+
+static int __init i10nm_init(void)
+{
+ u8 mc = 0, src_id = 0, node_id = 0;
+ const struct x86_cpu_id *id;
+ struct res_config *cfg;
+ const char *owner;
+ struct skx_dev *d;
+ int rc, i, off[3] = {0xd0, 0xc8, 0xcc};
+ u64 tolm, tohm;
+
+ edac_dbg(2, "\n");
+
+ owner = edac_get_owner();
+ if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR)))
+ return -EBUSY;
+
+ if (cpu_feature_enabled(X86_FEATURE_HYPERVISOR))
+ return -ENODEV;
+
+ id = x86_match_cpu(i10nm_cpuids);
+ if (!id)
+ return -ENODEV;
+
+ cfg = (struct res_config *)id->driver_data;
+ res_cfg = cfg;
+
+ rc = skx_get_hi_lo(0x09a2, off, &tolm, &tohm);
+ if (rc)
+ return rc;
+
+ rc = skx_get_all_bus_mappings(cfg, &i10nm_edac_list);
+ if (rc < 0)
+ goto fail;
+ if (rc == 0) {
+ i10nm_printk(KERN_ERR, "No memory controllers found\n");
+ return -ENODEV;
+ }
+
+ mem_cfg_2lm = i10nm_check_2lm(cfg);
+ skx_set_mem_cfg(mem_cfg_2lm);
+
+ rc = i10nm_get_ddr_munits();
+
+ if (i10nm_get_hbm_munits() && rc)
+ goto fail;
+
+ list_for_each_entry(d, i10nm_edac_list, list) {
+ rc = skx_get_src_id(d, 0xf8, &src_id);
+ if (rc < 0)
+ goto fail;
+
+ rc = skx_get_node_id(d, &node_id);
+ if (rc < 0)
+ goto fail;
+
+ edac_dbg(2, "src_id = %d node_id = %d\n", src_id, node_id);
+ for (i = 0; i < I10NM_NUM_IMC; i++) {
+ if (!d->imc[i].mdev)
+ continue;
+
+ d->imc[i].mc = mc++;
+ d->imc[i].lmc = i;
+ d->imc[i].src_id = src_id;
+ d->imc[i].node_id = node_id;
+ if (d->imc[i].hbm_mc) {
+ d->imc[i].chan_mmio_sz = cfg->hbm_chan_mmio_sz;
+ d->imc[i].num_channels = I10NM_NUM_HBM_CHANNELS;
+ d->imc[i].num_dimms = I10NM_NUM_HBM_DIMMS;
+ } else {
+ d->imc[i].chan_mmio_sz = cfg->ddr_chan_mmio_sz;
+ d->imc[i].num_channels = I10NM_NUM_DDR_CHANNELS;
+ d->imc[i].num_dimms = I10NM_NUM_DDR_DIMMS;
+ }
+
+ rc = skx_register_mci(&d->imc[i], d->imc[i].mdev,
+ "Intel_10nm Socket", EDAC_MOD_STR,
+ i10nm_get_dimm_config, cfg);
+ if (rc < 0)
+ goto fail;
+ }
+ }
+
+ rc = skx_adxl_get();
+ if (rc)
+ goto fail;
+
+ opstate_init();
+ mce_register_decode_chain(&i10nm_mce_dec);
+ setup_i10nm_debug();
+
+ if (retry_rd_err_log && res_cfg->offsets_scrub && res_cfg->offsets_demand) {
+ skx_set_decode(i10nm_mc_decode, show_retry_rd_err_log);
+ if (retry_rd_err_log == 2)
+ enable_retry_rd_err_log(true);
+ } else {
+ skx_set_decode(i10nm_mc_decode, NULL);
+ }
+
+ i10nm_printk(KERN_INFO, "%s\n", I10NM_REVISION);
+
+ return 0;
+fail:
+ skx_remove();
+ return rc;
+}
+
+static void __exit i10nm_exit(void)
+{
+ edac_dbg(2, "\n");
+
+ if (retry_rd_err_log && res_cfg->offsets_scrub && res_cfg->offsets_demand) {
+ skx_set_decode(NULL, NULL);
+ if (retry_rd_err_log == 2)
+ enable_retry_rd_err_log(false);
+ }
+
+ teardown_i10nm_debug();
+ mce_unregister_decode_chain(&i10nm_mce_dec);
+ skx_adxl_put();
+ skx_remove();
+}
+
+module_init(i10nm_init);
+module_exit(i10nm_exit);
+
+static int set_decoding_via_mca(const char *buf, const struct kernel_param *kp)
+{
+ unsigned long val;
+ int ret;
+
+ ret = kstrtoul(buf, 0, &val);
+
+ if (ret || val > 1)
+ return -EINVAL;
+
+ if (val && mem_cfg_2lm) {
+ i10nm_printk(KERN_NOTICE, "Decoding errors via MCA banks for 2LM isn't supported yet\n");
+ return -EIO;
+ }
+
+ ret = param_set_int(buf, kp);
+
+ return ret;
+}
+
+static const struct kernel_param_ops decoding_via_mca_param_ops = {
+ .set = set_decoding_via_mca,
+ .get = param_get_int,
+};
+
+module_param_cb(decoding_via_mca, &decoding_via_mca_param_ops, &decoding_via_mca, 0644);
+MODULE_PARM_DESC(decoding_via_mca, "decoding_via_mca: 0=off(default), 1=enable");
+
+module_param(retry_rd_err_log, int, 0444);
+MODULE_PARM_DESC(retry_rd_err_log, "retry_rd_err_log: 0=off(default), 1=bios(Linux doesn't reset any control bits, but just reports values.), 2=linux(Linux tries to take control and resets mode bits, clear valid/UC bits after reading.)");
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MC Driver for Intel 10nm server processors");