--- /dev/null
+/*
+ * Cavium ThunderX memory controller kernel module
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright Cavium, Inc. (C) 2015-2017. All rights reserved.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/edac.h>
+#include <linux/interrupt.h>
+#include <linux/string.h>
+#include <linux/stop_machine.h>
+#include <linux/delay.h>
+#include <linux/sizes.h>
+#include <linux/atomic.h>
+#include <linux/bitfield.h>
+#include <linux/circ_buf.h>
+
+#include <asm/page.h>
+
+#include "edac_module.h"
+
+#define phys_to_pfn(phys) (PFN_DOWN(phys))
+
+#define THUNDERX_NODE GENMASK(45, 44)
+
+enum {
+ ERR_CORRECTED = 1,
+ ERR_UNCORRECTED = 2,
+ ERR_UNKNOWN = 3,
+};
+
+#define MAX_SYNDROME_REGS 4
+
+struct error_syndrome {
+ u64 reg[MAX_SYNDROME_REGS];
+};
+
+struct error_descr {
+ int type;
+ u64 mask;
+ char *descr;
+};
+
+static void decode_register(char *str, size_t size,
+ const struct error_descr *descr,
+ const uint64_t reg)
+{
+ int ret = 0;
+
+ while (descr->type && descr->mask && descr->descr) {
+ if (reg & descr->mask) {
+ ret = snprintf(str, size, "\n\t%s, %s",
+ descr->type == ERR_CORRECTED ?
+ "Corrected" : "Uncorrected",
+ descr->descr);
+ str += ret;
+ size -= ret;
+ }
+ descr++;
+ }
+}
+
+static unsigned long get_bits(unsigned long data, int pos, int width)
+{
+ return (data >> pos) & ((1 << width) - 1);
+}
+
+#define L2C_CTL 0x87E080800000
+#define L2C_CTL_DISIDXALIAS BIT(0)
+
+#define PCI_DEVICE_ID_THUNDER_LMC 0xa022
+
+#define LMC_FADR 0x20
+#define LMC_FADR_FDIMM(x) ((x >> 37) & 0x1)
+#define LMC_FADR_FBUNK(x) ((x >> 36) & 0x1)
+#define LMC_FADR_FBANK(x) ((x >> 32) & 0xf)
+#define LMC_FADR_FROW(x) ((x >> 14) & 0xffff)
+#define LMC_FADR_FCOL(x) ((x >> 0) & 0x1fff)
+
+#define LMC_NXM_FADR 0x28
+#define LMC_ECC_SYND 0x38
+
+#define LMC_ECC_PARITY_TEST 0x108
+
+#define LMC_INT_W1S 0x150
+
+#define LMC_INT_ENA_W1C 0x158
+#define LMC_INT_ENA_W1S 0x160
+
+#define LMC_CONFIG 0x188
+
+#define LMC_CONFIG_BG2 BIT(62)
+#define LMC_CONFIG_RANK_ENA BIT(42)
+#define LMC_CONFIG_PBANK_LSB(x) (((x) >> 5) & 0xF)
+#define LMC_CONFIG_ROW_LSB(x) (((x) >> 2) & 0x7)
+
+#define LMC_CONTROL 0x190
+#define LMC_CONTROL_XOR_BANK BIT(16)
+
+#define LMC_INT 0x1F0
+
+#define LMC_INT_DDR_ERR BIT(11)
+#define LMC_INT_DED_ERR (0xFUL << 5)
+#define LMC_INT_SEC_ERR (0xFUL << 1)
+#define LMC_INT_NXM_WR_MASK BIT(0)
+
+#define LMC_DDR_PLL_CTL 0x258
+#define LMC_DDR_PLL_CTL_DDR4 BIT(29)
+
+#define LMC_FADR_SCRAMBLED 0x330
+
+#define LMC_INT_UE (LMC_INT_DDR_ERR | LMC_INT_DED_ERR | \
+ LMC_INT_NXM_WR_MASK)
+
+#define LMC_INT_CE (LMC_INT_SEC_ERR)
+
+static const struct error_descr lmc_errors[] = {
+ {
+ .type = ERR_CORRECTED,
+ .mask = LMC_INT_SEC_ERR,
+ .descr = "Single-bit ECC error",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = LMC_INT_DDR_ERR,
+ .descr = "DDR chip error",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = LMC_INT_DED_ERR,
+ .descr = "Double-bit ECC error",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = LMC_INT_NXM_WR_MASK,
+ .descr = "Non-existent memory write",
+ },
+ {0, 0, NULL},
+};
+
+#define LMC_INT_EN_DDR_ERROR_ALERT_ENA BIT(5)
+#define LMC_INT_EN_DLCRAM_DED_ERR BIT(4)
+#define LMC_INT_EN_DLCRAM_SEC_ERR BIT(3)
+#define LMC_INT_INTR_DED_ENA BIT(2)
+#define LMC_INT_INTR_SEC_ENA BIT(1)
+#define LMC_INT_INTR_NXM_WR_ENA BIT(0)
+
+#define LMC_INT_ENA_ALL GENMASK(5, 0)
+
+#define LMC_DDR_PLL_CTL 0x258
+#define LMC_DDR_PLL_CTL_DDR4 BIT(29)
+
+#define LMC_CONTROL 0x190
+#define LMC_CONTROL_RDIMM BIT(0)
+
+#define LMC_SCRAM_FADR 0x330
+
+#define LMC_CHAR_MASK0 0x228
+#define LMC_CHAR_MASK2 0x238
+
+#define RING_ENTRIES 8
+
+struct debugfs_entry {
+ const char *name;
+ umode_t mode;
+ const struct file_operations fops;
+};
+
+struct lmc_err_ctx {
+ u64 reg_int;
+ u64 reg_fadr;
+ u64 reg_nxm_fadr;
+ u64 reg_scram_fadr;
+ u64 reg_ecc_synd;
+};
+
+struct thunderx_lmc {
+ void __iomem *regs;
+ struct pci_dev *pdev;
+ struct msix_entry msix_ent;
+
+ atomic_t ecc_int;
+
+ u64 mask0;
+ u64 mask2;
+ u64 parity_test;
+ u64 node;
+
+ int xbits;
+ int bank_width;
+ int pbank_lsb;
+ int dimm_lsb;
+ int rank_lsb;
+ int bank_lsb;
+ int row_lsb;
+ int col_hi_lsb;
+
+ int xor_bank;
+ int l2c_alias;
+
+ struct page *mem;
+
+ struct lmc_err_ctx err_ctx[RING_ENTRIES];
+ unsigned long ring_head;
+ unsigned long ring_tail;
+};
+
+#define ring_pos(pos, size) ((pos) & (size - 1))
+
+#define DEBUGFS_STRUCT(_name, _mode, _write, _read) \
+static struct debugfs_entry debugfs_##_name = { \
+ .name = __stringify(_name), \
+ .mode = VERIFY_OCTAL_PERMISSIONS(_mode), \
+ .fops = { \
+ .open = simple_open, \
+ .write = _write, \
+ .read = _read, \
+ .llseek = generic_file_llseek, \
+ }, \
+}
+
+#define DEBUGFS_FIELD_ATTR(_type, _field) \
+static ssize_t thunderx_##_type##_##_field##_read(struct file *file, \
+ char __user *data, \
+ size_t count, loff_t *ppos) \
+{ \
+ struct thunderx_##_type *pdata = file->private_data; \
+ char buf[20]; \
+ \
+ snprintf(buf, count, "0x%016llx", pdata->_field); \
+ return simple_read_from_buffer(data, count, ppos, \
+ buf, sizeof(buf)); \
+} \
+ \
+static ssize_t thunderx_##_type##_##_field##_write(struct file *file, \
+ const char __user *data, \
+ size_t count, loff_t *ppos) \
+{ \
+ struct thunderx_##_type *pdata = file->private_data; \
+ int res; \
+ \
+ res = kstrtoull_from_user(data, count, 0, &pdata->_field); \
+ \
+ return res ? res : count; \
+} \
+ \
+DEBUGFS_STRUCT(_field, 0600, \
+ thunderx_##_type##_##_field##_write, \
+ thunderx_##_type##_##_field##_read) \
+
+#define DEBUGFS_REG_ATTR(_type, _name, _reg) \
+static ssize_t thunderx_##_type##_##_name##_read(struct file *file, \
+ char __user *data, \
+ size_t count, loff_t *ppos) \
+{ \
+ struct thunderx_##_type *pdata = file->private_data; \
+ char buf[20]; \
+ \
+ sprintf(buf, "0x%016llx", readq(pdata->regs + _reg)); \
+ return simple_read_from_buffer(data, count, ppos, \
+ buf, sizeof(buf)); \
+} \
+ \
+static ssize_t thunderx_##_type##_##_name##_write(struct file *file, \
+ const char __user *data, \
+ size_t count, loff_t *ppos) \
+{ \
+ struct thunderx_##_type *pdata = file->private_data; \
+ u64 val; \
+ int res; \
+ \
+ res = kstrtoull_from_user(data, count, 0, &val); \
+ \
+ if (!res) { \
+ writeq(val, pdata->regs + _reg); \
+ res = count; \
+ } \
+ \
+ return res; \
+} \
+ \
+DEBUGFS_STRUCT(_name, 0600, \
+ thunderx_##_type##_##_name##_write, \
+ thunderx_##_type##_##_name##_read)
+
+#define LMC_DEBUGFS_ENT(_field) DEBUGFS_FIELD_ATTR(lmc, _field)
+
+/*
+ * To get an ECC error injected, the following steps are needed:
+ * - Setup the ECC injection by writing the appropriate parameters:
+ * echo <bit mask value> > /sys/kernel/debug/<device number>/ecc_mask0
+ * echo <bit mask value> > /sys/kernel/debug/<device number>/ecc_mask2
+ * echo 0x802 > /sys/kernel/debug/<device number>/ecc_parity_test
+ * - Do the actual injection:
+ * echo 1 > /sys/kernel/debug/<device number>/inject_ecc
+ */
+static ssize_t thunderx_lmc_inject_int_write(struct file *file,
+ const char __user *data,
+ size_t count, loff_t *ppos)
+{
+ struct thunderx_lmc *lmc = file->private_data;
+ u64 val;
+ int res;
+
+ res = kstrtoull_from_user(data, count, 0, &val);
+
+ if (!res) {
+ /* Trigger the interrupt */
+ writeq(val, lmc->regs + LMC_INT_W1S);
+ res = count;
+ }
+
+ return res;
+}
+
+static ssize_t thunderx_lmc_int_read(struct file *file,
+ char __user *data,
+ size_t count, loff_t *ppos)
+{
+ struct thunderx_lmc *lmc = file->private_data;
+ char buf[20];
+ u64 lmc_int = readq(lmc->regs + LMC_INT);
+
+ snprintf(buf, sizeof(buf), "0x%016llx", lmc_int);
+ return simple_read_from_buffer(data, count, ppos, buf, sizeof(buf));
+}
+
+#define TEST_PATTERN 0xa5
+
+static int inject_ecc_fn(void *arg)
+{
+ struct thunderx_lmc *lmc = arg;
+ uintptr_t addr, phys;
+ unsigned int cline_size = cache_line_size();
+ const unsigned int lines = PAGE_SIZE / cline_size;
+ unsigned int i, cl_idx;
+
+ addr = (uintptr_t)page_address(lmc->mem);
+ phys = (uintptr_t)page_to_phys(lmc->mem);
+
+ cl_idx = (phys & 0x7f) >> 4;
+ lmc->parity_test &= ~(7ULL << 8);
+ lmc->parity_test |= (cl_idx << 8);
+
+ writeq(lmc->mask0, lmc->regs + LMC_CHAR_MASK0);
+ writeq(lmc->mask2, lmc->regs + LMC_CHAR_MASK2);
+ writeq(lmc->parity_test, lmc->regs + LMC_ECC_PARITY_TEST);
+
+ readq(lmc->regs + LMC_CHAR_MASK0);
+ readq(lmc->regs + LMC_CHAR_MASK2);
+ readq(lmc->regs + LMC_ECC_PARITY_TEST);
+
+ for (i = 0; i < lines; i++) {
+ memset((void *)addr, TEST_PATTERN, cline_size);
+ barrier();
+
+ /*
+ * Flush L1 cachelines to the PoC (L2).
+ * This will cause cacheline eviction to the L2.
+ */
+ asm volatile("dc civac, %0\n"
+ "dsb sy\n"
+ : : "r"(addr + i * cline_size));
+ }
+
+ for (i = 0; i < lines; i++) {
+ /*
+ * Flush L2 cachelines to the DRAM.
+ * This will cause cacheline eviction to the DRAM
+ * and ECC corruption according to the masks set.
+ */
+ __asm__ volatile("sys #0,c11,C1,#2, %0\n"
+ : : "r"(phys + i * cline_size));
+ }
+
+ for (i = 0; i < lines; i++) {
+ /*
+ * Invalidate L2 cachelines.
+ * The subsequent load will cause cacheline fetch
+ * from the DRAM and an error interrupt
+ */
+ __asm__ volatile("sys #0,c11,C1,#1, %0"
+ : : "r"(phys + i * cline_size));
+ }
+
+ for (i = 0; i < lines; i++) {
+ /*
+ * Invalidate L1 cachelines.
+ * The subsequent load will cause cacheline fetch
+ * from the L2 and/or DRAM
+ */
+ asm volatile("dc ivac, %0\n"
+ "dsb sy\n"
+ : : "r"(addr + i * cline_size));
+ }
+
+ return 0;
+}
+
+static ssize_t thunderx_lmc_inject_ecc_write(struct file *file,
+ const char __user *data,
+ size_t count, loff_t *ppos)
+{
+ struct thunderx_lmc *lmc = file->private_data;
+
+ unsigned int cline_size = cache_line_size();
+
+ u8 tmp[cline_size];
+ void __iomem *addr;
+ unsigned int offs, timeout = 100000;
+
+ atomic_set(&lmc->ecc_int, 0);
+
+ lmc->mem = alloc_pages_node(lmc->node, GFP_KERNEL, 0);
+
+ if (!lmc->mem)
+ return -ENOMEM;
+
+ addr = page_address(lmc->mem);
+
+ while (!atomic_read(&lmc->ecc_int) && timeout--) {
+ stop_machine(inject_ecc_fn, lmc, NULL);
+
+ for (offs = 0; offs < PAGE_SIZE; offs += sizeof(tmp)) {
+ /*
+ * Do a load from the previously rigged location
+ * This should generate an error interrupt.
+ */
+ memcpy(tmp, addr + offs, cline_size);
+ asm volatile("dsb ld\n");
+ }
+ }
+
+ __free_pages(lmc->mem, 0);
+
+ return count;
+}
+
+LMC_DEBUGFS_ENT(mask0);
+LMC_DEBUGFS_ENT(mask2);
+LMC_DEBUGFS_ENT(parity_test);
+
+DEBUGFS_STRUCT(inject_int, 0200, thunderx_lmc_inject_int_write, NULL);
+DEBUGFS_STRUCT(inject_ecc, 0200, thunderx_lmc_inject_ecc_write, NULL);
+DEBUGFS_STRUCT(int_w1c, 0400, NULL, thunderx_lmc_int_read);
+
+struct debugfs_entry *lmc_dfs_ents[] = {
+ &debugfs_mask0,
+ &debugfs_mask2,
+ &debugfs_parity_test,
+ &debugfs_inject_ecc,
+ &debugfs_inject_int,
+ &debugfs_int_w1c,
+};
+
+static int thunderx_create_debugfs_nodes(struct dentry *parent,
+ struct debugfs_entry *attrs[],
+ void *data,
+ size_t num)
+{
+ int i;
+ struct dentry *ent;
+
+ if (!IS_ENABLED(CONFIG_EDAC_DEBUG))
+ return 0;
+
+ if (!parent)
+ return -ENOENT;
+
+ for (i = 0; i < num; i++) {
+ ent = edac_debugfs_create_file(attrs[i]->name, attrs[i]->mode,
+ parent, data, &attrs[i]->fops);
+
+ if (!ent)
+ break;
+ }
+
+ return i;
+}
+
+static phys_addr_t thunderx_faddr_to_phys(u64 faddr, struct thunderx_lmc *lmc)
+{
+ phys_addr_t addr = 0;
+ int bank, xbits;
+
+ addr |= lmc->node << 40;
+ addr |= LMC_FADR_FDIMM(faddr) << lmc->dimm_lsb;
+ addr |= LMC_FADR_FBUNK(faddr) << lmc->rank_lsb;
+ addr |= LMC_FADR_FROW(faddr) << lmc->row_lsb;
+ addr |= (LMC_FADR_FCOL(faddr) >> 4) << lmc->col_hi_lsb;
+
+ bank = LMC_FADR_FBANK(faddr) << lmc->bank_lsb;
+
+ if (lmc->xor_bank)
+ bank ^= get_bits(addr, 12 + lmc->xbits, lmc->bank_width);
+
+ addr |= bank << lmc->bank_lsb;
+
+ xbits = PCI_FUNC(lmc->pdev->devfn);
+
+ if (lmc->l2c_alias)
+ xbits ^= get_bits(addr, 20, lmc->xbits) ^
+ get_bits(addr, 12, lmc->xbits);
+
+ addr |= xbits << 7;
+
+ return addr;
+}
+
+static unsigned int thunderx_get_num_lmcs(unsigned int node)
+{
+ unsigned int number = 0;
+ struct pci_dev *pdev = NULL;
+
+ do {
+ pdev = pci_get_device(PCI_VENDOR_ID_CAVIUM,
+ PCI_DEVICE_ID_THUNDER_LMC,
+ pdev);
+ if (pdev) {
+#ifdef CONFIG_NUMA
+ if (pdev->dev.numa_node == node)
+ number++;
+#else
+ number++;
+#endif
+ }
+ } while (pdev);
+
+ return number;
+}
+
+#define LMC_MESSAGE_SIZE 120
+#define LMC_OTHER_SIZE (50 * ARRAY_SIZE(lmc_errors))
+
+static irqreturn_t thunderx_lmc_err_isr(int irq, void *dev_id)
+{
+ struct mem_ctl_info *mci = dev_id;
+ struct thunderx_lmc *lmc = mci->pvt_info;
+
+ unsigned long head = ring_pos(lmc->ring_head, ARRAY_SIZE(lmc->err_ctx));
+ struct lmc_err_ctx *ctx = &lmc->err_ctx[head];
+
+ writeq(0, lmc->regs + LMC_CHAR_MASK0);
+ writeq(0, lmc->regs + LMC_CHAR_MASK2);
+ writeq(0x2, lmc->regs + LMC_ECC_PARITY_TEST);
+
+ ctx->reg_int = readq(lmc->regs + LMC_INT);
+ ctx->reg_fadr = readq(lmc->regs + LMC_FADR);
+ ctx->reg_nxm_fadr = readq(lmc->regs + LMC_NXM_FADR);
+ ctx->reg_scram_fadr = readq(lmc->regs + LMC_SCRAM_FADR);
+ ctx->reg_ecc_synd = readq(lmc->regs + LMC_ECC_SYND);
+
+ lmc->ring_head++;
+
+ atomic_set(&lmc->ecc_int, 1);
+
+ /* Clear the interrupt */
+ writeq(ctx->reg_int, lmc->regs + LMC_INT);
+
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t thunderx_lmc_threaded_isr(int irq, void *dev_id)
+{
+ struct mem_ctl_info *mci = dev_id;
+ struct thunderx_lmc *lmc = mci->pvt_info;
+ phys_addr_t phys_addr;
+
+ unsigned long tail;
+ struct lmc_err_ctx *ctx;
+
+ irqreturn_t ret = IRQ_NONE;
+
+ char *msg;
+ char *other;
+
+ msg = kmalloc(LMC_MESSAGE_SIZE, GFP_KERNEL);
+ other = kmalloc(LMC_OTHER_SIZE, GFP_KERNEL);
+
+ if (!msg || !other)
+ goto err_free;
+
+ while (CIRC_CNT(lmc->ring_head, lmc->ring_tail,
+ ARRAY_SIZE(lmc->err_ctx))) {
+ tail = ring_pos(lmc->ring_tail, ARRAY_SIZE(lmc->err_ctx));
+
+ ctx = &lmc->err_ctx[tail];
+
+ dev_dbg(&lmc->pdev->dev, "LMC_INT: %016llx\n",
+ ctx->reg_int);
+ dev_dbg(&lmc->pdev->dev, "LMC_FADR: %016llx\n",
+ ctx->reg_fadr);
+ dev_dbg(&lmc->pdev->dev, "LMC_NXM_FADR: %016llx\n",
+ ctx->reg_nxm_fadr);
+ dev_dbg(&lmc->pdev->dev, "LMC_SCRAM_FADR: %016llx\n",
+ ctx->reg_scram_fadr);
+ dev_dbg(&lmc->pdev->dev, "LMC_ECC_SYND: %016llx\n",
+ ctx->reg_ecc_synd);
+
+ snprintf(msg, LMC_MESSAGE_SIZE,
+ "DIMM %lld rank %lld bank %lld row %lld col %lld",
+ LMC_FADR_FDIMM(ctx->reg_scram_fadr),
+ LMC_FADR_FBUNK(ctx->reg_scram_fadr),
+ LMC_FADR_FBANK(ctx->reg_scram_fadr),
+ LMC_FADR_FROW(ctx->reg_scram_fadr),
+ LMC_FADR_FCOL(ctx->reg_scram_fadr));
+
+ decode_register(other, LMC_OTHER_SIZE, lmc_errors,
+ ctx->reg_int);
+
+ phys_addr = thunderx_faddr_to_phys(ctx->reg_fadr, lmc);
+
+ if (ctx->reg_int & LMC_INT_UE)
+ edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1,
+ phys_to_pfn(phys_addr),
+ offset_in_page(phys_addr),
+ 0, -1, -1, -1, msg, other);
+ else if (ctx->reg_int & LMC_INT_CE)
+ edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1,
+ phys_to_pfn(phys_addr),
+ offset_in_page(phys_addr),
+ 0, -1, -1, -1, msg, other);
+
+ lmc->ring_tail++;
+ }
+
+ ret = IRQ_HANDLED;
+
+err_free:
+ kfree(msg);
+ kfree(other);
+
+ return ret;
+}
+
+#ifdef CONFIG_PM
+static int thunderx_lmc_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ pci_save_state(pdev);
+ pci_disable_device(pdev);
+
+ pci_set_power_state(pdev, pci_choose_state(pdev, state));
+
+ return 0;
+}
+
+static int thunderx_lmc_resume(struct pci_dev *pdev)
+{
+ pci_set_power_state(pdev, PCI_D0);
+ pci_enable_wake(pdev, PCI_D0, 0);
+ pci_restore_state(pdev);
+
+ return 0;
+}
+#endif
+
+static const struct pci_device_id thunderx_lmc_pci_tbl[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVICE_ID_THUNDER_LMC) },
+ { 0, },
+};
+
+static inline int pci_dev_to_mc_idx(struct pci_dev *pdev)
+{
+ int node = dev_to_node(&pdev->dev);
+ int ret = PCI_FUNC(pdev->devfn);
+
+ ret += max(node, 0) << 8;
+
+ return ret;
+}
+
+static int thunderx_lmc_probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ struct thunderx_lmc *lmc;
+ struct edac_mc_layer layer;
+ struct mem_ctl_info *mci;
+ u64 lmc_control, lmc_ddr_pll_ctl, lmc_config;
+ int ret;
+ u64 lmc_int;
+ void *l2c_ioaddr;
+
+ layer.type = EDAC_MC_LAYER_SLOT;
+ layer.size = 2;
+ layer.is_virt_csrow = false;
+
+ ret = pcim_enable_device(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "Cannot enable PCI device: %d\n", ret);
+ return ret;
+ }
+
+ ret = pcim_iomap_regions(pdev, BIT(0), "thunderx_lmc");
+ if (ret) {
+ dev_err(&pdev->dev, "Cannot map PCI resources: %d\n", ret);
+ return ret;
+ }
+
+ mci = edac_mc_alloc(pci_dev_to_mc_idx(pdev), 1, &layer,
+ sizeof(struct thunderx_lmc));
+ if (!mci)
+ return -ENOMEM;
+
+ mci->pdev = &pdev->dev;
+ lmc = mci->pvt_info;
+
+ pci_set_drvdata(pdev, mci);
+
+ lmc->regs = pcim_iomap_table(pdev)[0];
+
+ lmc_control = readq(lmc->regs + LMC_CONTROL);
+ lmc_ddr_pll_ctl = readq(lmc->regs + LMC_DDR_PLL_CTL);
+ lmc_config = readq(lmc->regs + LMC_CONFIG);
+
+ if (lmc_control & LMC_CONTROL_RDIMM) {
+ mci->mtype_cap = FIELD_GET(LMC_DDR_PLL_CTL_DDR4,
+ lmc_ddr_pll_ctl) ?
+ MEM_RDDR4 : MEM_RDDR3;
+ } else {
+ mci->mtype_cap = FIELD_GET(LMC_DDR_PLL_CTL_DDR4,
+ lmc_ddr_pll_ctl) ?
+ MEM_DDR4 : MEM_DDR3;
+ }
+
+ mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED;
+ mci->edac_cap = EDAC_FLAG_SECDED;
+
+ mci->mod_name = "thunderx-lmc";
+ mci->mod_ver = "1";
+ mci->ctl_name = "thunderx-lmc";
+ mci->dev_name = dev_name(&pdev->dev);
+ mci->scrub_mode = SCRUB_NONE;
+
+ lmc->pdev = pdev;
+ lmc->msix_ent.entry = 0;
+
+ lmc->ring_head = 0;
+ lmc->ring_tail = 0;
+
+ ret = pci_enable_msix_exact(pdev, &lmc->msix_ent, 1);
+ if (ret) {
+ dev_err(&pdev->dev, "Cannot enable interrupt: %d\n", ret);
+ goto err_free;
+ }
+
+ ret = devm_request_threaded_irq(&pdev->dev, lmc->msix_ent.vector,
+ thunderx_lmc_err_isr,
+ thunderx_lmc_threaded_isr, 0,
+ "[EDAC] ThunderX LMC", mci);
+ if (ret) {
+ dev_err(&pdev->dev, "Cannot set ISR: %d\n", ret);
+ goto err_free;
+ }
+
+ lmc->node = FIELD_GET(THUNDERX_NODE, pci_resource_start(pdev, 0));
+
+ lmc->xbits = thunderx_get_num_lmcs(lmc->node) >> 1;
+ lmc->bank_width = (FIELD_GET(LMC_DDR_PLL_CTL_DDR4, lmc_ddr_pll_ctl) &&
+ FIELD_GET(LMC_CONFIG_BG2, lmc_config)) ? 4 : 3;
+
+ lmc->pbank_lsb = (lmc_config >> 5) & 0xf;
+ lmc->dimm_lsb = 28 + lmc->pbank_lsb + lmc->xbits;
+ lmc->rank_lsb = lmc->dimm_lsb;
+ lmc->rank_lsb -= FIELD_GET(LMC_CONFIG_RANK_ENA, lmc_config) ? 1 : 0;
+ lmc->bank_lsb = 7 + lmc->xbits;
+ lmc->row_lsb = 14 + LMC_CONFIG_ROW_LSB(lmc_config) + lmc->xbits;
+
+ lmc->col_hi_lsb = lmc->bank_lsb + lmc->bank_width;
+
+ lmc->xor_bank = lmc_control & LMC_CONTROL_XOR_BANK;
+
+ l2c_ioaddr = ioremap(L2C_CTL | FIELD_PREP(THUNDERX_NODE, lmc->node),
+ PAGE_SIZE);
+
+ if (!l2c_ioaddr) {
+ dev_err(&pdev->dev, "Cannot map L2C_CTL\n");
+ goto err_free;
+ }
+
+ lmc->l2c_alias = !(readq(l2c_ioaddr) & L2C_CTL_DISIDXALIAS);
+
+ iounmap(l2c_ioaddr);
+
+ ret = edac_mc_add_mc(mci);
+ if (ret) {
+ dev_err(&pdev->dev, "Cannot add the MC: %d\n", ret);
+ goto err_free;
+ }
+
+ lmc_int = readq(lmc->regs + LMC_INT);
+ writeq(lmc_int, lmc->regs + LMC_INT);
+
+ writeq(LMC_INT_ENA_ALL, lmc->regs + LMC_INT_ENA_W1S);
+
+ if (IS_ENABLED(CONFIG_EDAC_DEBUG)) {
+ ret = thunderx_create_debugfs_nodes(mci->debugfs,
+ lmc_dfs_ents,
+ lmc,
+ ARRAY_SIZE(lmc_dfs_ents));
+
+ if (ret != ARRAY_SIZE(lmc_dfs_ents)) {
+ dev_warn(&pdev->dev, "Error creating debugfs entries: %d%s\n",
+ ret, ret >= 0 ? " created" : "");
+ }
+ }
+
+ return 0;
+
+err_free:
+ pci_set_drvdata(pdev, NULL);
+ edac_mc_free(mci);
+
+ return ret;
+}
+
+static void thunderx_lmc_remove(struct pci_dev *pdev)
+{
+ struct mem_ctl_info *mci = pci_get_drvdata(pdev);
+ struct thunderx_lmc *lmc = mci->pvt_info;
+
+ writeq(LMC_INT_ENA_ALL, lmc->regs + LMC_INT_ENA_W1C);
+
+ edac_mc_del_mc(&pdev->dev);
+ edac_mc_free(mci);
+}
+
+MODULE_DEVICE_TABLE(pci, thunderx_lmc_pci_tbl);
+
+static struct pci_driver thunderx_lmc_driver = {
+ .name = "thunderx_lmc_edac",
+ .probe = thunderx_lmc_probe,
+ .remove = thunderx_lmc_remove,
+#ifdef CONFIG_PM
+ .suspend = thunderx_lmc_suspend,
+ .resume = thunderx_lmc_resume,
+#endif
+ .id_table = thunderx_lmc_pci_tbl,
+};
+
+/*---------------------- OCX driver ---------------------------------*/
+
+#define PCI_DEVICE_ID_THUNDER_OCX 0xa013
+
+#define OCX_LINK_INTS 3
+#define OCX_INTS (OCX_LINK_INTS + 1)
+#define OCX_RX_LANES 24
+#define OCX_RX_LANE_STATS 15
+
+#define OCX_COM_INT 0x100
+#define OCX_COM_INT_W1S 0x108
+#define OCX_COM_INT_ENA_W1S 0x110
+#define OCX_COM_INT_ENA_W1C 0x118
+
+#define OCX_COM_IO_BADID BIT(54)
+#define OCX_COM_MEM_BADID BIT(53)
+#define OCX_COM_COPR_BADID BIT(52)
+#define OCX_COM_WIN_REQ_BADID BIT(51)
+#define OCX_COM_WIN_REQ_TOUT BIT(50)
+#define OCX_COM_RX_LANE GENMASK(23, 0)
+
+#define OCX_COM_INT_UE (0)
+
+#define OCX_COM_INT_CE (OCX_COM_IO_BADID | \
+ OCX_COM_MEM_BADID | \
+ OCX_COM_COPR_BADID | \
+ OCX_COM_WIN_REQ_BADID | \
+ OCX_COM_WIN_REQ_TOUT)
+
+static const struct error_descr ocx_com_errors[] = {
+ {
+ .type = ERR_CORRECTED,
+ .mask = OCX_COM_IO_BADID,
+ .descr = "Invalid IO transaction node ID",
+ },
+ {
+ .type = ERR_CORRECTED,
+ .mask = OCX_COM_MEM_BADID,
+ .descr = "Invalid memory transaction node ID",
+ },
+ {
+ .type = ERR_CORRECTED,
+ .mask = OCX_COM_COPR_BADID,
+ .descr = "Invalid coprocessor transaction node ID",
+ },
+ {
+ .type = ERR_CORRECTED,
+ .mask = OCX_COM_WIN_REQ_BADID,
+ .descr = "Invalid SLI transaction node ID",
+ },
+ {
+ .type = ERR_CORRECTED,
+ .mask = OCX_COM_WIN_REQ_TOUT,
+ .descr = "Window/core request timeout",
+ },
+ {0, 0, NULL},
+};
+
+#define OCX_COM_LINKX_INT(x) (0x120 + (x) * 8)
+#define OCX_COM_LINKX_INT_W1S(x) (0x140 + (x) * 8)
+#define OCX_COM_LINKX_INT_ENA_W1S(x) (0x160 + (x) * 8)
+#define OCX_COM_LINKX_INT_ENA_W1C(x) (0x180 + (x) * 8)
+
+#define OCX_COM_LINK_BAD_WORD BIT(13)
+#define OCX_COM_LINK_ALIGN_FAIL BIT(12)
+#define OCX_COM_LINK_ALIGN_DONE BIT(11)
+#define OCX_COM_LINK_UP BIT(10)
+#define OCX_COM_LINK_STOP BIT(9)
+#define OCX_COM_LINK_BLK_ERR BIT(8)
+#define OCX_COM_LINK_REINIT BIT(7)
+#define OCX_COM_LINK_LNK_DATA BIT(6)
+#define OCX_COM_LINK_RXFIFO_DBE BIT(5)
+#define OCX_COM_LINK_RXFIFO_SBE BIT(4)
+#define OCX_COM_LINK_TXFIFO_DBE BIT(3)
+#define OCX_COM_LINK_TXFIFO_SBE BIT(2)
+#define OCX_COM_LINK_REPLAY_DBE BIT(1)
+#define OCX_COM_LINK_REPLAY_SBE BIT(0)
+
+static const struct error_descr ocx_com_link_errors[] = {
+ {
+ .type = ERR_CORRECTED,
+ .mask = OCX_COM_LINK_REPLAY_SBE,
+ .descr = "Replay buffer single-bit error",
+ },
+ {
+ .type = ERR_CORRECTED,
+ .mask = OCX_COM_LINK_TXFIFO_SBE,
+ .descr = "TX FIFO single-bit error",
+ },
+ {
+ .type = ERR_CORRECTED,
+ .mask = OCX_COM_LINK_RXFIFO_SBE,
+ .descr = "RX FIFO single-bit error",
+ },
+ {
+ .type = ERR_CORRECTED,
+ .mask = OCX_COM_LINK_BLK_ERR,
+ .descr = "Block code error",
+ },
+ {
+ .type = ERR_CORRECTED,
+ .mask = OCX_COM_LINK_ALIGN_FAIL,
+ .descr = "Link alignment failure",
+ },
+ {
+ .type = ERR_CORRECTED,
+ .mask = OCX_COM_LINK_BAD_WORD,
+ .descr = "Bad code word",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = OCX_COM_LINK_REPLAY_DBE,
+ .descr = "Replay buffer double-bit error",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = OCX_COM_LINK_TXFIFO_DBE,
+ .descr = "TX FIFO double-bit error",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = OCX_COM_LINK_RXFIFO_DBE,
+ .descr = "RX FIFO double-bit error",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = OCX_COM_LINK_STOP,
+ .descr = "Link stopped",
+ },
+ {0, 0, NULL},
+};
+
+#define OCX_COM_LINK_INT_UE (OCX_COM_LINK_REPLAY_DBE | \
+ OCX_COM_LINK_TXFIFO_DBE | \
+ OCX_COM_LINK_RXFIFO_DBE | \
+ OCX_COM_LINK_STOP)
+
+#define OCX_COM_LINK_INT_CE (OCX_COM_LINK_REPLAY_SBE | \
+ OCX_COM_LINK_TXFIFO_SBE | \
+ OCX_COM_LINK_RXFIFO_SBE | \
+ OCX_COM_LINK_BLK_ERR | \
+ OCX_COM_LINK_ALIGN_FAIL | \
+ OCX_COM_LINK_BAD_WORD)
+
+#define OCX_LNE_INT(x) (0x8018 + (x) * 0x100)
+#define OCX_LNE_INT_EN(x) (0x8020 + (x) * 0x100)
+#define OCX_LNE_BAD_CNT(x) (0x8028 + (x) * 0x100)
+#define OCX_LNE_CFG(x) (0x8000 + (x) * 0x100)
+#define OCX_LNE_STAT(x, y) (0x8040 + (x) * 0x100 + (y) * 8)
+
+#define OCX_LNE_CFG_RX_BDRY_LOCK_DIS BIT(8)
+#define OCX_LNE_CFG_RX_STAT_WRAP_DIS BIT(2)
+#define OCX_LNE_CFG_RX_STAT_RDCLR BIT(1)
+#define OCX_LNE_CFG_RX_STAT_ENA BIT(0)
+
+
+#define OCX_LANE_BAD_64B67B BIT(8)
+#define OCX_LANE_DSKEW_FIFO_OVFL BIT(5)
+#define OCX_LANE_SCRM_SYNC_LOSS BIT(4)
+#define OCX_LANE_UKWN_CNTL_WORD BIT(3)
+#define OCX_LANE_CRC32_ERR BIT(2)
+#define OCX_LANE_BDRY_SYNC_LOSS BIT(1)
+#define OCX_LANE_SERDES_LOCK_LOSS BIT(0)
+
+#define OCX_COM_LANE_INT_UE (0)
+#define OCX_COM_LANE_INT_CE (OCX_LANE_SERDES_LOCK_LOSS | \
+ OCX_LANE_BDRY_SYNC_LOSS | \
+ OCX_LANE_CRC32_ERR | \
+ OCX_LANE_UKWN_CNTL_WORD | \
+ OCX_LANE_SCRM_SYNC_LOSS | \
+ OCX_LANE_DSKEW_FIFO_OVFL | \
+ OCX_LANE_BAD_64B67B)
+
+static const struct error_descr ocx_lane_errors[] = {
+ {
+ .type = ERR_CORRECTED,
+ .mask = OCX_LANE_SERDES_LOCK_LOSS,
+ .descr = "RX SerDes lock lost",
+ },
+ {
+ .type = ERR_CORRECTED,
+ .mask = OCX_LANE_BDRY_SYNC_LOSS,
+ .descr = "RX word boundary lost",
+ },
+ {
+ .type = ERR_CORRECTED,
+ .mask = OCX_LANE_CRC32_ERR,
+ .descr = "CRC32 error",
+ },
+ {
+ .type = ERR_CORRECTED,
+ .mask = OCX_LANE_UKWN_CNTL_WORD,
+ .descr = "Unknown control word",
+ },
+ {
+ .type = ERR_CORRECTED,
+ .mask = OCX_LANE_SCRM_SYNC_LOSS,
+ .descr = "Scrambler synchronization lost",
+ },
+ {
+ .type = ERR_CORRECTED,
+ .mask = OCX_LANE_DSKEW_FIFO_OVFL,
+ .descr = "RX deskew FIFO overflow",
+ },
+ {
+ .type = ERR_CORRECTED,
+ .mask = OCX_LANE_BAD_64B67B,
+ .descr = "Bad 64B/67B codeword",
+ },
+ {0, 0, NULL},
+};
+
+#define OCX_LNE_INT_ENA_ALL (GENMASK(9, 8) | GENMASK(6, 0))
+#define OCX_COM_INT_ENA_ALL (GENMASK(54, 50) | GENMASK(23, 0))
+#define OCX_COM_LINKX_INT_ENA_ALL (GENMASK(13, 12) | \
+ GENMASK(9, 7) | GENMASK(5, 0))
+
+#define OCX_TLKX_ECC_CTL(x) (0x10018 + (x) * 0x2000)
+#define OCX_RLKX_ECC_CTL(x) (0x18018 + (x) * 0x2000)
+
+struct ocx_com_err_ctx {
+ u64 reg_com_int;
+ u64 reg_lane_int[OCX_RX_LANES];
+ u64 reg_lane_stat11[OCX_RX_LANES];
+};
+
+struct ocx_link_err_ctx {
+ u64 reg_com_link_int;
+ int link;
+};
+
+struct thunderx_ocx {
+ void __iomem *regs;
+ int com_link;
+ struct pci_dev *pdev;
+ struct edac_device_ctl_info *edac_dev;
+
+ struct dentry *debugfs;
+ struct msix_entry msix_ent[OCX_INTS];
+
+ struct ocx_com_err_ctx com_err_ctx[RING_ENTRIES];
+ struct ocx_link_err_ctx link_err_ctx[RING_ENTRIES];
+
+ unsigned long com_ring_head;
+ unsigned long com_ring_tail;
+
+ unsigned long link_ring_head;
+ unsigned long link_ring_tail;
+};
+
+#define OCX_MESSAGE_SIZE SZ_1K
+#define OCX_OTHER_SIZE (50 * ARRAY_SIZE(ocx_com_link_errors))
+
+/* This handler is threaded */
+static irqreturn_t thunderx_ocx_com_isr(int irq, void *irq_id)
+{
+ struct msix_entry *msix = irq_id;
+ struct thunderx_ocx *ocx = container_of(msix, struct thunderx_ocx,
+ msix_ent[msix->entry]);
+
+ int lane;
+ unsigned long head = ring_pos(ocx->com_ring_head,
+ ARRAY_SIZE(ocx->com_err_ctx));
+ struct ocx_com_err_ctx *ctx = &ocx->com_err_ctx[head];
+
+ ctx->reg_com_int = readq(ocx->regs + OCX_COM_INT);
+
+ for (lane = 0; lane < OCX_RX_LANES; lane++) {
+ ctx->reg_lane_int[lane] =
+ readq(ocx->regs + OCX_LNE_INT(lane));
+ ctx->reg_lane_stat11[lane] =
+ readq(ocx->regs + OCX_LNE_STAT(lane, 11));
+
+ writeq(ctx->reg_lane_int[lane], ocx->regs + OCX_LNE_INT(lane));
+ }
+
+ writeq(ctx->reg_com_int, ocx->regs + OCX_COM_INT);
+
+ ocx->com_ring_head++;
+
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t thunderx_ocx_com_threaded_isr(int irq, void *irq_id)
+{
+ struct msix_entry *msix = irq_id;
+ struct thunderx_ocx *ocx = container_of(msix, struct thunderx_ocx,
+ msix_ent[msix->entry]);
+
+ irqreturn_t ret = IRQ_NONE;
+
+ unsigned long tail;
+ struct ocx_com_err_ctx *ctx;
+ int lane;
+ char *msg;
+ char *other;
+
+ msg = kmalloc(OCX_MESSAGE_SIZE, GFP_KERNEL);
+ other = kmalloc(OCX_OTHER_SIZE, GFP_KERNEL);
+
+ if (!msg || !other)
+ goto err_free;
+
+ while (CIRC_CNT(ocx->com_ring_head, ocx->com_ring_tail,
+ ARRAY_SIZE(ocx->com_err_ctx))) {
+ tail = ring_pos(ocx->com_ring_tail,
+ ARRAY_SIZE(ocx->com_err_ctx));
+ ctx = &ocx->com_err_ctx[tail];
+
+ snprintf(msg, OCX_MESSAGE_SIZE, "%s: OCX_COM_INT: %016llx",
+ ocx->edac_dev->ctl_name, ctx->reg_com_int);
+
+ decode_register(other, OCX_OTHER_SIZE,
+ ocx_com_errors, ctx->reg_com_int);
+
+ strncat(msg, other, OCX_MESSAGE_SIZE);
+
+ for (lane = 0; lane < OCX_RX_LANES; lane++)
+ if (ctx->reg_com_int & BIT(lane)) {
+ snprintf(other, OCX_OTHER_SIZE,
+ "\n\tOCX_LNE_INT[%02d]: %016llx OCX_LNE_STAT11[%02d]: %016llx",
+ lane, ctx->reg_lane_int[lane],
+ lane, ctx->reg_lane_stat11[lane]);
+
+ strncat(msg, other, OCX_MESSAGE_SIZE);
+
+ decode_register(other, OCX_OTHER_SIZE,
+ ocx_lane_errors,
+ ctx->reg_lane_int[lane]);
+ strncat(msg, other, OCX_MESSAGE_SIZE);
+ }
+
+ if (ctx->reg_com_int & OCX_COM_INT_UE)
+ edac_device_handle_ue(ocx->edac_dev, 0, 0, msg);
+ else if (ctx->reg_com_int & OCX_COM_INT_CE)
+ edac_device_handle_ce(ocx->edac_dev, 0, 0, msg);
+
+ ocx->com_ring_tail++;
+ }
+
+ ret = IRQ_HANDLED;
+
+err_free:
+ kfree(other);
+ kfree(msg);
+
+ return ret;
+}
+
+static irqreturn_t thunderx_ocx_lnk_isr(int irq, void *irq_id)
+{
+ struct msix_entry *msix = irq_id;
+ struct thunderx_ocx *ocx = container_of(msix, struct thunderx_ocx,
+ msix_ent[msix->entry]);
+ unsigned long head = ring_pos(ocx->link_ring_head,
+ ARRAY_SIZE(ocx->link_err_ctx));
+ struct ocx_link_err_ctx *ctx = &ocx->link_err_ctx[head];
+
+ ctx->link = msix->entry;
+ ctx->reg_com_link_int = readq(ocx->regs + OCX_COM_LINKX_INT(ctx->link));
+
+ writeq(ctx->reg_com_link_int, ocx->regs + OCX_COM_LINKX_INT(ctx->link));
+
+ ocx->link_ring_head++;
+
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t thunderx_ocx_lnk_threaded_isr(int irq, void *irq_id)
+{
+ struct msix_entry *msix = irq_id;
+ struct thunderx_ocx *ocx = container_of(msix, struct thunderx_ocx,
+ msix_ent[msix->entry]);
+ irqreturn_t ret = IRQ_NONE;
+ unsigned long tail;
+ struct ocx_link_err_ctx *ctx;
+
+ char *msg;
+ char *other;
+
+ msg = kmalloc(OCX_MESSAGE_SIZE, GFP_KERNEL);
+ other = kmalloc(OCX_OTHER_SIZE, GFP_KERNEL);
+
+ if (!msg || !other)
+ goto err_free;
+
+ while (CIRC_CNT(ocx->link_ring_head, ocx->link_ring_tail,
+ ARRAY_SIZE(ocx->link_err_ctx))) {
+ tail = ring_pos(ocx->link_ring_head,
+ ARRAY_SIZE(ocx->link_err_ctx));
+
+ ctx = &ocx->link_err_ctx[tail];
+
+ snprintf(msg, OCX_MESSAGE_SIZE,
+ "%s: OCX_COM_LINK_INT[%d]: %016llx",
+ ocx->edac_dev->ctl_name,
+ ctx->link, ctx->reg_com_link_int);
+
+ decode_register(other, OCX_OTHER_SIZE,
+ ocx_com_link_errors, ctx->reg_com_link_int);
+
+ strncat(msg, other, OCX_MESSAGE_SIZE);
+
+ if (ctx->reg_com_link_int & OCX_COM_LINK_INT_UE)
+ edac_device_handle_ue(ocx->edac_dev, 0, 0, msg);
+ else if (ctx->reg_com_link_int & OCX_COM_LINK_INT_CE)
+ edac_device_handle_ce(ocx->edac_dev, 0, 0, msg);
+
+ ocx->link_ring_tail++;
+ }
+
+ ret = IRQ_HANDLED;
+err_free:
+ kfree(other);
+ kfree(msg);
+
+ return ret;
+}
+
+#define OCX_DEBUGFS_ATTR(_name, _reg) DEBUGFS_REG_ATTR(ocx, _name, _reg)
+
+OCX_DEBUGFS_ATTR(tlk0_ecc_ctl, OCX_TLKX_ECC_CTL(0));
+OCX_DEBUGFS_ATTR(tlk1_ecc_ctl, OCX_TLKX_ECC_CTL(1));
+OCX_DEBUGFS_ATTR(tlk2_ecc_ctl, OCX_TLKX_ECC_CTL(2));
+
+OCX_DEBUGFS_ATTR(rlk0_ecc_ctl, OCX_RLKX_ECC_CTL(0));
+OCX_DEBUGFS_ATTR(rlk1_ecc_ctl, OCX_RLKX_ECC_CTL(1));
+OCX_DEBUGFS_ATTR(rlk2_ecc_ctl, OCX_RLKX_ECC_CTL(2));
+
+OCX_DEBUGFS_ATTR(com_link0_int, OCX_COM_LINKX_INT_W1S(0));
+OCX_DEBUGFS_ATTR(com_link1_int, OCX_COM_LINKX_INT_W1S(1));
+OCX_DEBUGFS_ATTR(com_link2_int, OCX_COM_LINKX_INT_W1S(2));
+
+OCX_DEBUGFS_ATTR(lne00_badcnt, OCX_LNE_BAD_CNT(0));
+OCX_DEBUGFS_ATTR(lne01_badcnt, OCX_LNE_BAD_CNT(1));
+OCX_DEBUGFS_ATTR(lne02_badcnt, OCX_LNE_BAD_CNT(2));
+OCX_DEBUGFS_ATTR(lne03_badcnt, OCX_LNE_BAD_CNT(3));
+OCX_DEBUGFS_ATTR(lne04_badcnt, OCX_LNE_BAD_CNT(4));
+OCX_DEBUGFS_ATTR(lne05_badcnt, OCX_LNE_BAD_CNT(5));
+OCX_DEBUGFS_ATTR(lne06_badcnt, OCX_LNE_BAD_CNT(6));
+OCX_DEBUGFS_ATTR(lne07_badcnt, OCX_LNE_BAD_CNT(7));
+
+OCX_DEBUGFS_ATTR(lne08_badcnt, OCX_LNE_BAD_CNT(8));
+OCX_DEBUGFS_ATTR(lne09_badcnt, OCX_LNE_BAD_CNT(9));
+OCX_DEBUGFS_ATTR(lne10_badcnt, OCX_LNE_BAD_CNT(10));
+OCX_DEBUGFS_ATTR(lne11_badcnt, OCX_LNE_BAD_CNT(11));
+OCX_DEBUGFS_ATTR(lne12_badcnt, OCX_LNE_BAD_CNT(12));
+OCX_DEBUGFS_ATTR(lne13_badcnt, OCX_LNE_BAD_CNT(13));
+OCX_DEBUGFS_ATTR(lne14_badcnt, OCX_LNE_BAD_CNT(14));
+OCX_DEBUGFS_ATTR(lne15_badcnt, OCX_LNE_BAD_CNT(15));
+
+OCX_DEBUGFS_ATTR(lne16_badcnt, OCX_LNE_BAD_CNT(16));
+OCX_DEBUGFS_ATTR(lne17_badcnt, OCX_LNE_BAD_CNT(17));
+OCX_DEBUGFS_ATTR(lne18_badcnt, OCX_LNE_BAD_CNT(18));
+OCX_DEBUGFS_ATTR(lne19_badcnt, OCX_LNE_BAD_CNT(19));
+OCX_DEBUGFS_ATTR(lne20_badcnt, OCX_LNE_BAD_CNT(20));
+OCX_DEBUGFS_ATTR(lne21_badcnt, OCX_LNE_BAD_CNT(21));
+OCX_DEBUGFS_ATTR(lne22_badcnt, OCX_LNE_BAD_CNT(22));
+OCX_DEBUGFS_ATTR(lne23_badcnt, OCX_LNE_BAD_CNT(23));
+
+OCX_DEBUGFS_ATTR(com_int, OCX_COM_INT_W1S);
+
+struct debugfs_entry *ocx_dfs_ents[] = {
+ &debugfs_tlk0_ecc_ctl,
+ &debugfs_tlk1_ecc_ctl,
+ &debugfs_tlk2_ecc_ctl,
+
+ &debugfs_rlk0_ecc_ctl,
+ &debugfs_rlk1_ecc_ctl,
+ &debugfs_rlk2_ecc_ctl,
+
+ &debugfs_com_link0_int,
+ &debugfs_com_link1_int,
+ &debugfs_com_link2_int,
+
+ &debugfs_lne00_badcnt,
+ &debugfs_lne01_badcnt,
+ &debugfs_lne02_badcnt,
+ &debugfs_lne03_badcnt,
+ &debugfs_lne04_badcnt,
+ &debugfs_lne05_badcnt,
+ &debugfs_lne06_badcnt,
+ &debugfs_lne07_badcnt,
+ &debugfs_lne08_badcnt,
+ &debugfs_lne09_badcnt,
+ &debugfs_lne10_badcnt,
+ &debugfs_lne11_badcnt,
+ &debugfs_lne12_badcnt,
+ &debugfs_lne13_badcnt,
+ &debugfs_lne14_badcnt,
+ &debugfs_lne15_badcnt,
+ &debugfs_lne16_badcnt,
+ &debugfs_lne17_badcnt,
+ &debugfs_lne18_badcnt,
+ &debugfs_lne19_badcnt,
+ &debugfs_lne20_badcnt,
+ &debugfs_lne21_badcnt,
+ &debugfs_lne22_badcnt,
+ &debugfs_lne23_badcnt,
+
+ &debugfs_com_int,
+};
+
+static const struct pci_device_id thunderx_ocx_pci_tbl[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVICE_ID_THUNDER_OCX) },
+ { 0, },
+};
+
+static void thunderx_ocx_clearstats(struct thunderx_ocx *ocx)
+{
+ int lane, stat, cfg;
+
+ for (lane = 0; lane < OCX_RX_LANES; lane++) {
+ cfg = readq(ocx->regs + OCX_LNE_CFG(lane));
+ cfg |= OCX_LNE_CFG_RX_STAT_RDCLR;
+ cfg &= ~OCX_LNE_CFG_RX_STAT_ENA;
+ writeq(cfg, ocx->regs + OCX_LNE_CFG(lane));
+
+ for (stat = 0; stat < OCX_RX_LANE_STATS; stat++)
+ readq(ocx->regs + OCX_LNE_STAT(lane, stat));
+ }
+}
+
+static int thunderx_ocx_probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ struct thunderx_ocx *ocx;
+ struct edac_device_ctl_info *edac_dev;
+ char name[32];
+ int idx;
+ int i;
+ int ret;
+ u64 reg;
+
+ ret = pcim_enable_device(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "Cannot enable PCI device: %d\n", ret);
+ return ret;
+ }
+
+ ret = pcim_iomap_regions(pdev, BIT(0), "thunderx_ocx");
+ if (ret) {
+ dev_err(&pdev->dev, "Cannot map PCI resources: %d\n", ret);
+ return ret;
+ }
+
+ idx = edac_device_alloc_index();
+ snprintf(name, sizeof(name), "OCX%d", idx);
+ edac_dev = edac_device_alloc_ctl_info(sizeof(struct thunderx_ocx),
+ name, 1, "CCPI", 1,
+ 0, NULL, 0, idx);
+ if (!edac_dev) {
+ dev_err(&pdev->dev, "Cannot allocate EDAC device: %d\n", ret);
+ return -ENOMEM;
+ }
+ ocx = edac_dev->pvt_info;
+ ocx->edac_dev = edac_dev;
+ ocx->com_ring_head = 0;
+ ocx->com_ring_tail = 0;
+ ocx->link_ring_head = 0;
+ ocx->link_ring_tail = 0;
+
+ ocx->regs = pcim_iomap_table(pdev)[0];
+ if (!ocx->regs) {
+ dev_err(&pdev->dev, "Cannot map PCI resources: %d\n", ret);
+ ret = -ENODEV;
+ goto err_free;
+ }
+
+ ocx->pdev = pdev;
+
+ for (i = 0; i < OCX_INTS; i++) {
+ ocx->msix_ent[i].entry = i;
+ ocx->msix_ent[i].vector = 0;
+ }
+
+ ret = pci_enable_msix_exact(pdev, ocx->msix_ent, OCX_INTS);
+ if (ret) {
+ dev_err(&pdev->dev, "Cannot enable interrupt: %d\n", ret);
+ goto err_free;
+ }
+
+ for (i = 0; i < OCX_INTS; i++) {
+ ret = devm_request_threaded_irq(&pdev->dev,
+ ocx->msix_ent[i].vector,
+ (i == 3) ?
+ thunderx_ocx_com_isr :
+ thunderx_ocx_lnk_isr,
+ (i == 3) ?
+ thunderx_ocx_com_threaded_isr :
+ thunderx_ocx_lnk_threaded_isr,
+ 0, "[EDAC] ThunderX OCX",
+ &ocx->msix_ent[i]);
+ if (ret)
+ goto err_free;
+ }
+
+ edac_dev->dev = &pdev->dev;
+ edac_dev->dev_name = dev_name(&pdev->dev);
+ edac_dev->mod_name = "thunderx-ocx";
+ edac_dev->ctl_name = "thunderx-ocx";
+
+ ret = edac_device_add_device(edac_dev);
+ if (ret) {
+ dev_err(&pdev->dev, "Cannot add EDAC device: %d\n", ret);
+ goto err_free;
+ }
+
+ if (IS_ENABLED(CONFIG_EDAC_DEBUG)) {
+ ocx->debugfs = edac_debugfs_create_dir(pdev->dev.kobj.name);
+
+ ret = thunderx_create_debugfs_nodes(ocx->debugfs,
+ ocx_dfs_ents,
+ ocx,
+ ARRAY_SIZE(ocx_dfs_ents));
+ if (ret != ARRAY_SIZE(ocx_dfs_ents)) {
+ dev_warn(&pdev->dev, "Error creating debugfs entries: %d%s\n",
+ ret, ret >= 0 ? " created" : "");
+ }
+ }
+
+ pci_set_drvdata(pdev, edac_dev);
+
+ thunderx_ocx_clearstats(ocx);
+
+ for (i = 0; i < OCX_RX_LANES; i++) {
+ writeq(OCX_LNE_INT_ENA_ALL,
+ ocx->regs + OCX_LNE_INT_EN(i));
+
+ reg = readq(ocx->regs + OCX_LNE_INT(i));
+ writeq(reg, ocx->regs + OCX_LNE_INT(i));
+
+ }
+
+ for (i = 0; i < OCX_LINK_INTS; i++) {
+ reg = readq(ocx->regs + OCX_COM_LINKX_INT(i));
+ writeq(reg, ocx->regs + OCX_COM_LINKX_INT(i));
+
+ writeq(OCX_COM_LINKX_INT_ENA_ALL,
+ ocx->regs + OCX_COM_LINKX_INT_ENA_W1S(i));
+ }
+
+ reg = readq(ocx->regs + OCX_COM_INT);
+ writeq(reg, ocx->regs + OCX_COM_INT);
+
+ writeq(OCX_COM_INT_ENA_ALL, ocx->regs + OCX_COM_INT_ENA_W1S);
+
+ return 0;
+err_free:
+ edac_device_free_ctl_info(edac_dev);
+
+ return ret;
+}
+
+static void thunderx_ocx_remove(struct pci_dev *pdev)
+{
+ struct edac_device_ctl_info *edac_dev = pci_get_drvdata(pdev);
+ struct thunderx_ocx *ocx = edac_dev->pvt_info;
+ int i;
+
+ writeq(OCX_COM_INT_ENA_ALL, ocx->regs + OCX_COM_INT_ENA_W1C);
+
+ for (i = 0; i < OCX_INTS; i++) {
+ writeq(OCX_COM_LINKX_INT_ENA_ALL,
+ ocx->regs + OCX_COM_LINKX_INT_ENA_W1C(i));
+ }
+
+ edac_debugfs_remove_recursive(ocx->debugfs);
+
+ edac_device_del_device(&pdev->dev);
+ edac_device_free_ctl_info(edac_dev);
+}
+
+MODULE_DEVICE_TABLE(pci, thunderx_ocx_pci_tbl);
+
+static struct pci_driver thunderx_ocx_driver = {
+ .name = "thunderx_ocx_edac",
+ .probe = thunderx_ocx_probe,
+ .remove = thunderx_ocx_remove,
+ .id_table = thunderx_ocx_pci_tbl,
+};
+
+/*---------------------- L2C driver ---------------------------------*/
+
+#define PCI_DEVICE_ID_THUNDER_L2C_TAD 0xa02e
+#define PCI_DEVICE_ID_THUNDER_L2C_CBC 0xa02f
+#define PCI_DEVICE_ID_THUNDER_L2C_MCI 0xa030
+
+#define L2C_TAD_INT_W1C 0x40000
+#define L2C_TAD_INT_W1S 0x40008
+
+#define L2C_TAD_INT_ENA_W1C 0x40020
+#define L2C_TAD_INT_ENA_W1S 0x40028
+
+
+#define L2C_TAD_INT_L2DDBE BIT(1)
+#define L2C_TAD_INT_SBFSBE BIT(2)
+#define L2C_TAD_INT_SBFDBE BIT(3)
+#define L2C_TAD_INT_FBFSBE BIT(4)
+#define L2C_TAD_INT_FBFDBE BIT(5)
+#define L2C_TAD_INT_TAGDBE BIT(9)
+#define L2C_TAD_INT_RDDISLMC BIT(15)
+#define L2C_TAD_INT_WRDISLMC BIT(16)
+#define L2C_TAD_INT_LFBTO BIT(17)
+#define L2C_TAD_INT_GSYNCTO BIT(18)
+#define L2C_TAD_INT_RTGSBE BIT(32)
+#define L2C_TAD_INT_RTGDBE BIT(33)
+#define L2C_TAD_INT_RDDISOCI BIT(34)
+#define L2C_TAD_INT_WRDISOCI BIT(35)
+
+#define L2C_TAD_INT_ECC (L2C_TAD_INT_L2DDBE | \
+ L2C_TAD_INT_SBFSBE | L2C_TAD_INT_SBFDBE | \
+ L2C_TAD_INT_FBFSBE | L2C_TAD_INT_FBFDBE)
+
+#define L2C_TAD_INT_CE (L2C_TAD_INT_SBFSBE | \
+ L2C_TAD_INT_FBFSBE)
+
+#define L2C_TAD_INT_UE (L2C_TAD_INT_L2DDBE | \
+ L2C_TAD_INT_SBFDBE | \
+ L2C_TAD_INT_FBFDBE | \
+ L2C_TAD_INT_TAGDBE | \
+ L2C_TAD_INT_RTGDBE | \
+ L2C_TAD_INT_WRDISOCI | \
+ L2C_TAD_INT_RDDISOCI | \
+ L2C_TAD_INT_WRDISLMC | \
+ L2C_TAD_INT_RDDISLMC | \
+ L2C_TAD_INT_LFBTO | \
+ L2C_TAD_INT_GSYNCTO)
+
+static const struct error_descr l2_tad_errors[] = {
+ {
+ .type = ERR_CORRECTED,
+ .mask = L2C_TAD_INT_SBFSBE,
+ .descr = "SBF single-bit error",
+ },
+ {
+ .type = ERR_CORRECTED,
+ .mask = L2C_TAD_INT_FBFSBE,
+ .descr = "FBF single-bit error",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = L2C_TAD_INT_L2DDBE,
+ .descr = "L2D double-bit error",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = L2C_TAD_INT_SBFDBE,
+ .descr = "SBF double-bit error",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = L2C_TAD_INT_FBFDBE,
+ .descr = "FBF double-bit error",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = L2C_TAD_INT_TAGDBE,
+ .descr = "TAG double-bit error",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = L2C_TAD_INT_RTGDBE,
+ .descr = "RTG double-bit error",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = L2C_TAD_INT_WRDISOCI,
+ .descr = "Write to a disabled CCPI",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = L2C_TAD_INT_RDDISOCI,
+ .descr = "Read from a disabled CCPI",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = L2C_TAD_INT_WRDISLMC,
+ .descr = "Write to a disabled LMC",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = L2C_TAD_INT_RDDISLMC,
+ .descr = "Read from a disabled LMC",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = L2C_TAD_INT_LFBTO,
+ .descr = "LFB entry timeout",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = L2C_TAD_INT_GSYNCTO,
+ .descr = "Global sync CCPI timeout",
+ },
+ {0, 0, NULL},
+};
+
+#define L2C_TAD_INT_TAG (L2C_TAD_INT_TAGDBE)
+
+#define L2C_TAD_INT_RTG (L2C_TAD_INT_RTGDBE)
+
+#define L2C_TAD_INT_NXM (0)
+
+#define L2C_TAD_INT_DISLMC (L2C_TAD_INT_WRDISLMC | L2C_TAD_INT_RDDISLMC)
+
+#define L2C_TAD_INT_DISOCI (L2C_TAD_INT_WRDISOCI | L2C_TAD_INT_RDDISOCI)
+
+#define L2C_TAD_INT_ENA_ALL (L2C_TAD_INT_ECC | L2C_TAD_INT_TAG | \
+ L2C_TAD_INT_RTG | L2C_TAD_INT_NXM | \
+ L2C_TAD_INT_DISLMC | L2C_TAD_INT_DISOCI | \
+ L2C_TAD_INT_LFBTO)
+
+#define L2C_TAD_TIMETWO 0x50000
+#define L2C_TAD_TIMEOUT 0x50100
+#define L2C_TAD_ERR 0x60000
+#define L2C_TAD_TQD_ERR 0x60100
+#define L2C_TAD_TTG_ERR 0x60200
+
+
+#define L2C_CBC_INT_W1C 0x60000
+
+#define L2C_CBC_INT_RSDSBE BIT(0)
+#define L2C_CBC_INT_RSDDBE BIT(1)
+
+#define L2C_CBC_INT_RSD (L2C_CBC_INT_RSDSBE | L2C_CBC_INT_RSDDBE)
+
+#define L2C_CBC_INT_MIBSBE BIT(4)
+#define L2C_CBC_INT_MIBDBE BIT(5)
+
+#define L2C_CBC_INT_MIB (L2C_CBC_INT_MIBSBE | L2C_CBC_INT_MIBDBE)
+
+#define L2C_CBC_INT_IORDDISOCI BIT(6)
+#define L2C_CBC_INT_IOWRDISOCI BIT(7)
+
+#define L2C_CBC_INT_IODISOCI (L2C_CBC_INT_IORDDISOCI | \
+ L2C_CBC_INT_IOWRDISOCI)
+
+#define L2C_CBC_INT_CE (L2C_CBC_INT_RSDSBE | L2C_CBC_INT_MIBSBE)
+#define L2C_CBC_INT_UE (L2C_CBC_INT_RSDDBE | L2C_CBC_INT_MIBDBE)
+
+
+static const struct error_descr l2_cbc_errors[] = {
+ {
+ .type = ERR_CORRECTED,
+ .mask = L2C_CBC_INT_RSDSBE,
+ .descr = "RSD single-bit error",
+ },
+ {
+ .type = ERR_CORRECTED,
+ .mask = L2C_CBC_INT_MIBSBE,
+ .descr = "MIB single-bit error",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = L2C_CBC_INT_RSDDBE,
+ .descr = "RSD double-bit error",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = L2C_CBC_INT_MIBDBE,
+ .descr = "MIB double-bit error",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = L2C_CBC_INT_IORDDISOCI,
+ .descr = "Read from a disabled CCPI",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = L2C_CBC_INT_IOWRDISOCI,
+ .descr = "Write to a disabled CCPI",
+ },
+ {0, 0, NULL},
+};
+
+#define L2C_CBC_INT_W1S 0x60008
+#define L2C_CBC_INT_ENA_W1C 0x60020
+
+#define L2C_CBC_INT_ENA_ALL (L2C_CBC_INT_RSD | L2C_CBC_INT_MIB | \
+ L2C_CBC_INT_IODISOCI)
+
+#define L2C_CBC_INT_ENA_W1S 0x60028
+
+#define L2C_CBC_IODISOCIERR 0x80008
+#define L2C_CBC_IOCERR 0x80010
+#define L2C_CBC_RSDERR 0x80018
+#define L2C_CBC_MIBERR 0x80020
+
+
+#define L2C_MCI_INT_W1C 0x0
+
+#define L2C_MCI_INT_VBFSBE BIT(0)
+#define L2C_MCI_INT_VBFDBE BIT(1)
+
+static const struct error_descr l2_mci_errors[] = {
+ {
+ .type = ERR_CORRECTED,
+ .mask = L2C_MCI_INT_VBFSBE,
+ .descr = "VBF single-bit error",
+ },
+ {
+ .type = ERR_UNCORRECTED,
+ .mask = L2C_MCI_INT_VBFDBE,
+ .descr = "VBF double-bit error",
+ },
+ {0, 0, NULL},
+};
+
+#define L2C_MCI_INT_W1S 0x8
+#define L2C_MCI_INT_ENA_W1C 0x20
+
+#define L2C_MCI_INT_ENA_ALL (L2C_MCI_INT_VBFSBE | L2C_MCI_INT_VBFDBE)
+
+#define L2C_MCI_INT_ENA_W1S 0x28
+
+#define L2C_MCI_ERR 0x10000
+
+#define L2C_MESSAGE_SIZE SZ_1K
+#define L2C_OTHER_SIZE (50 * ARRAY_SIZE(l2_tad_errors))
+
+struct l2c_err_ctx {
+ char *reg_ext_name;
+ u64 reg_int;
+ u64 reg_ext;
+};
+
+struct thunderx_l2c {
+ void __iomem *regs;
+ struct pci_dev *pdev;
+ struct edac_device_ctl_info *edac_dev;
+
+ struct dentry *debugfs;
+
+ int index;
+
+ struct msix_entry msix_ent;
+
+ struct l2c_err_ctx err_ctx[RING_ENTRIES];
+ unsigned long ring_head;
+ unsigned long ring_tail;
+};
+
+static irqreturn_t thunderx_l2c_tad_isr(int irq, void *irq_id)
+{
+ struct msix_entry *msix = irq_id;
+ struct thunderx_l2c *tad = container_of(msix, struct thunderx_l2c,
+ msix_ent);
+
+ unsigned long head = ring_pos(tad->ring_head, ARRAY_SIZE(tad->err_ctx));
+ struct l2c_err_ctx *ctx = &tad->err_ctx[head];
+
+ ctx->reg_int = readq(tad->regs + L2C_TAD_INT_W1C);
+
+ if (ctx->reg_int & L2C_TAD_INT_ECC) {
+ ctx->reg_ext_name = "TQD_ERR";
+ ctx->reg_ext = readq(tad->regs + L2C_TAD_TQD_ERR);
+ } else if (ctx->reg_int & L2C_TAD_INT_TAG) {
+ ctx->reg_ext_name = "TTG_ERR";
+ ctx->reg_ext = readq(tad->regs + L2C_TAD_TTG_ERR);
+ } else if (ctx->reg_int & L2C_TAD_INT_NXM) {
+ ctx->reg_ext_name = "ERR";
+ ctx->reg_ext = readq(tad->regs + L2C_TAD_ERR);
+ } else if (ctx->reg_int & L2C_TAD_INT_LFBTO) {
+ ctx->reg_ext_name = "TIMEOUT";
+ ctx->reg_ext = readq(tad->regs + L2C_TAD_TIMEOUT);
+ } else if (ctx->reg_int & L2C_TAD_INT_DISOCI) {
+ ctx->reg_ext_name = "ERR";
+ ctx->reg_ext = readq(tad->regs + L2C_TAD_ERR);
+ }
+
+ writeq(ctx->reg_int, tad->regs + L2C_TAD_INT_W1C);
+
+ tad->ring_head++;
+
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t thunderx_l2c_cbc_isr(int irq, void *irq_id)
+{
+ struct msix_entry *msix = irq_id;
+ struct thunderx_l2c *cbc = container_of(msix, struct thunderx_l2c,
+ msix_ent);
+
+ unsigned long head = ring_pos(cbc->ring_head, ARRAY_SIZE(cbc->err_ctx));
+ struct l2c_err_ctx *ctx = &cbc->err_ctx[head];
+
+ ctx->reg_int = readq(cbc->regs + L2C_CBC_INT_W1C);
+
+ if (ctx->reg_int & L2C_CBC_INT_RSD) {
+ ctx->reg_ext_name = "RSDERR";
+ ctx->reg_ext = readq(cbc->regs + L2C_CBC_RSDERR);
+ } else if (ctx->reg_int & L2C_CBC_INT_MIB) {
+ ctx->reg_ext_name = "MIBERR";
+ ctx->reg_ext = readq(cbc->regs + L2C_CBC_MIBERR);
+ } else if (ctx->reg_int & L2C_CBC_INT_IODISOCI) {
+ ctx->reg_ext_name = "IODISOCIERR";
+ ctx->reg_ext = readq(cbc->regs + L2C_CBC_IODISOCIERR);
+ }
+
+ writeq(ctx->reg_int, cbc->regs + L2C_CBC_INT_W1C);
+
+ cbc->ring_head++;
+
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t thunderx_l2c_mci_isr(int irq, void *irq_id)
+{
+ struct msix_entry *msix = irq_id;
+ struct thunderx_l2c *mci = container_of(msix, struct thunderx_l2c,
+ msix_ent);
+
+ unsigned long head = ring_pos(mci->ring_head, ARRAY_SIZE(mci->err_ctx));
+ struct l2c_err_ctx *ctx = &mci->err_ctx[head];
+
+ ctx->reg_int = readq(mci->regs + L2C_MCI_INT_W1C);
+ ctx->reg_ext = readq(mci->regs + L2C_MCI_ERR);
+
+ writeq(ctx->reg_int, mci->regs + L2C_MCI_INT_W1C);
+
+ ctx->reg_ext_name = "ERR";
+
+ mci->ring_head++;
+
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t thunderx_l2c_threaded_isr(int irq, void *irq_id)
+{
+ struct msix_entry *msix = irq_id;
+ struct thunderx_l2c *l2c = container_of(msix, struct thunderx_l2c,
+ msix_ent);
+
+ unsigned long tail = ring_pos(l2c->ring_tail, ARRAY_SIZE(l2c->err_ctx));
+ struct l2c_err_ctx *ctx = &l2c->err_ctx[tail];
+ irqreturn_t ret = IRQ_NONE;
+
+ u64 mask_ue, mask_ce;
+ const struct error_descr *l2_errors;
+ char *reg_int_name;
+
+ char *msg;
+ char *other;
+
+ msg = kmalloc(OCX_MESSAGE_SIZE, GFP_KERNEL);
+ other = kmalloc(OCX_OTHER_SIZE, GFP_KERNEL);
+
+ if (!msg || !other)
+ goto err_free;
+
+ switch (l2c->pdev->device) {
+ case PCI_DEVICE_ID_THUNDER_L2C_TAD:
+ reg_int_name = "L2C_TAD_INT";
+ mask_ue = L2C_TAD_INT_UE;
+ mask_ce = L2C_TAD_INT_CE;
+ l2_errors = l2_tad_errors;
+ break;
+ case PCI_DEVICE_ID_THUNDER_L2C_CBC:
+ reg_int_name = "L2C_CBC_INT";
+ mask_ue = L2C_CBC_INT_UE;
+ mask_ce = L2C_CBC_INT_CE;
+ l2_errors = l2_cbc_errors;
+ break;
+ case PCI_DEVICE_ID_THUNDER_L2C_MCI:
+ reg_int_name = "L2C_MCI_INT";
+ mask_ue = L2C_MCI_INT_VBFDBE;
+ mask_ce = L2C_MCI_INT_VBFSBE;
+ l2_errors = l2_mci_errors;
+ break;
+ default:
+ dev_err(&l2c->pdev->dev, "Unsupported device: %04x\n",
+ l2c->pdev->device);
+ return IRQ_NONE;
+ }
+
+ while (CIRC_CNT(l2c->ring_head, l2c->ring_tail,
+ ARRAY_SIZE(l2c->err_ctx))) {
+ snprintf(msg, L2C_MESSAGE_SIZE,
+ "%s: %s: %016llx, %s: %016llx",
+ l2c->edac_dev->ctl_name, reg_int_name, ctx->reg_int,
+ ctx->reg_ext_name, ctx->reg_ext);
+
+ decode_register(other, L2C_OTHER_SIZE, l2_errors, ctx->reg_int);
+
+ strncat(msg, other, L2C_MESSAGE_SIZE);
+
+ if (ctx->reg_int & mask_ue)
+ edac_device_handle_ue(l2c->edac_dev, 0, 0, msg);
+ else if (ctx->reg_int & mask_ce)
+ edac_device_handle_ce(l2c->edac_dev, 0, 0, msg);
+
+ l2c->ring_tail++;
+ }
+
+ return IRQ_HANDLED;
+
+err_free:
+ kfree(other);
+ kfree(msg);
+
+ return ret;
+}
+
+#define L2C_DEBUGFS_ATTR(_name, _reg) DEBUGFS_REG_ATTR(l2c, _name, _reg)
+
+L2C_DEBUGFS_ATTR(tad_int, L2C_TAD_INT_W1S);
+
+struct debugfs_entry *l2c_tad_dfs_ents[] = {
+ &debugfs_tad_int,
+};
+
+L2C_DEBUGFS_ATTR(cbc_int, L2C_CBC_INT_W1S);
+
+struct debugfs_entry *l2c_cbc_dfs_ents[] = {
+ &debugfs_cbc_int,
+};
+
+L2C_DEBUGFS_ATTR(mci_int, L2C_MCI_INT_W1S);
+
+struct debugfs_entry *l2c_mci_dfs_ents[] = {
+ &debugfs_mci_int,
+};
+
+static const struct pci_device_id thunderx_l2c_pci_tbl[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVICE_ID_THUNDER_L2C_TAD), },
+ { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVICE_ID_THUNDER_L2C_CBC), },
+ { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVICE_ID_THUNDER_L2C_MCI), },
+ { 0, },
+};
+
+static int thunderx_l2c_probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ struct thunderx_l2c *l2c;
+ struct edac_device_ctl_info *edac_dev;
+ struct debugfs_entry **l2c_devattr;
+ size_t dfs_entries;
+ irqreturn_t (*thunderx_l2c_isr)(int, void *) = NULL;
+ char name[32];
+ const char *fmt;
+ u64 reg_en_offs, reg_en_mask;
+ int idx;
+ int ret;
+
+ ret = pcim_enable_device(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "Cannot enable PCI device: %d\n", ret);
+ return ret;
+ }
+
+ ret = pcim_iomap_regions(pdev, BIT(0), "thunderx_l2c");
+ if (ret) {
+ dev_err(&pdev->dev, "Cannot map PCI resources: %d\n", ret);
+ return ret;
+ }
+
+ switch (pdev->device) {
+ case PCI_DEVICE_ID_THUNDER_L2C_TAD:
+ thunderx_l2c_isr = thunderx_l2c_tad_isr;
+ l2c_devattr = l2c_tad_dfs_ents;
+ dfs_entries = ARRAY_SIZE(l2c_tad_dfs_ents);
+ fmt = "L2C-TAD%d";
+ reg_en_offs = L2C_TAD_INT_ENA_W1S;
+ reg_en_mask = L2C_TAD_INT_ENA_ALL;
+ break;
+ case PCI_DEVICE_ID_THUNDER_L2C_CBC:
+ thunderx_l2c_isr = thunderx_l2c_cbc_isr;
+ l2c_devattr = l2c_cbc_dfs_ents;
+ dfs_entries = ARRAY_SIZE(l2c_cbc_dfs_ents);
+ fmt = "L2C-CBC%d";
+ reg_en_offs = L2C_CBC_INT_ENA_W1S;
+ reg_en_mask = L2C_CBC_INT_ENA_ALL;
+ break;
+ case PCI_DEVICE_ID_THUNDER_L2C_MCI:
+ thunderx_l2c_isr = thunderx_l2c_mci_isr;
+ l2c_devattr = l2c_mci_dfs_ents;
+ dfs_entries = ARRAY_SIZE(l2c_mci_dfs_ents);
+ fmt = "L2C-MCI%d";
+ reg_en_offs = L2C_MCI_INT_ENA_W1S;
+ reg_en_mask = L2C_MCI_INT_ENA_ALL;
+ break;
+ default:
+ //Should never ever get here
+ dev_err(&pdev->dev, "Unsupported PCI device: %04x\n",
+ pdev->device);
+ return -EINVAL;
+ }
+
+ idx = edac_device_alloc_index();
+ snprintf(name, sizeof(name), fmt, idx);
+
+ edac_dev = edac_device_alloc_ctl_info(sizeof(struct thunderx_l2c),
+ name, 1, "L2C", 1, 0,
+ NULL, 0, idx);
+ if (!edac_dev) {
+ dev_err(&pdev->dev, "Cannot allocate EDAC device\n");
+ return -ENOMEM;
+ }
+
+ l2c = edac_dev->pvt_info;
+ l2c->edac_dev = edac_dev;
+
+ l2c->regs = pcim_iomap_table(pdev)[0];
+ if (!l2c->regs) {
+ dev_err(&pdev->dev, "Cannot map PCI resources\n");
+ ret = -ENODEV;
+ goto err_free;
+ }
+
+ l2c->pdev = pdev;
+
+ l2c->ring_head = 0;
+ l2c->ring_tail = 0;
+
+ l2c->msix_ent.entry = 0;
+ l2c->msix_ent.vector = 0;
+
+ ret = pci_enable_msix_exact(pdev, &l2c->msix_ent, 1);
+ if (ret) {
+ dev_err(&pdev->dev, "Cannot enable interrupt: %d\n", ret);
+ goto err_free;
+ }
+
+ ret = devm_request_threaded_irq(&pdev->dev, l2c->msix_ent.vector,
+ thunderx_l2c_isr,
+ thunderx_l2c_threaded_isr,
+ 0, "[EDAC] ThunderX L2C",
+ &l2c->msix_ent);
+ if (ret)
+ goto err_free;
+
+ edac_dev->dev = &pdev->dev;
+ edac_dev->dev_name = dev_name(&pdev->dev);
+ edac_dev->mod_name = "thunderx-l2c";
+ edac_dev->ctl_name = "thunderx-l2c";
+
+ ret = edac_device_add_device(edac_dev);
+ if (ret) {
+ dev_err(&pdev->dev, "Cannot add EDAC device: %d\n", ret);
+ goto err_free;
+ }
+
+ if (IS_ENABLED(CONFIG_EDAC_DEBUG)) {
+ l2c->debugfs = edac_debugfs_create_dir(pdev->dev.kobj.name);
+
+ thunderx_create_debugfs_nodes(l2c->debugfs, l2c_devattr,
+ l2c, dfs_entries);
+
+ if (ret != dfs_entries) {
+ dev_warn(&pdev->dev, "Error creating debugfs entries: %d%s\n",
+ ret, ret >= 0 ? " created" : "");
+ }
+ }
+
+ pci_set_drvdata(pdev, edac_dev);
+
+ writeq(reg_en_mask, l2c->regs + reg_en_offs);
+
+ return 0;
+
+err_free:
+ edac_device_free_ctl_info(edac_dev);
+
+ return ret;
+}
+
+static void thunderx_l2c_remove(struct pci_dev *pdev)
+{
+ struct edac_device_ctl_info *edac_dev = pci_get_drvdata(pdev);
+ struct thunderx_l2c *l2c = edac_dev->pvt_info;
+
+ switch (pdev->device) {
+ case PCI_DEVICE_ID_THUNDER_L2C_TAD:
+ writeq(L2C_TAD_INT_ENA_ALL, l2c->regs + L2C_TAD_INT_ENA_W1C);
+ break;
+ case PCI_DEVICE_ID_THUNDER_L2C_CBC:
+ writeq(L2C_CBC_INT_ENA_ALL, l2c->regs + L2C_CBC_INT_ENA_W1C);
+ break;
+ case PCI_DEVICE_ID_THUNDER_L2C_MCI:
+ writeq(L2C_CBC_INT_ENA_ALL, l2c->regs + L2C_MCI_INT_ENA_W1C);
+ break;
+ }
+
+ edac_debugfs_remove_recursive(l2c->debugfs);
+
+ edac_device_del_device(&pdev->dev);
+ edac_device_free_ctl_info(edac_dev);
+}
+
+MODULE_DEVICE_TABLE(pci, thunderx_l2c_pci_tbl);
+
+static struct pci_driver thunderx_l2c_driver = {
+ .name = "thunderx_l2c_edac",
+ .probe = thunderx_l2c_probe,
+ .remove = thunderx_l2c_remove,
+ .id_table = thunderx_l2c_pci_tbl,
+};
+
+static int __init thunderx_edac_init(void)
+{
+ int rc = 0;
+
+ rc = pci_register_driver(&thunderx_lmc_driver);
+ if (rc)
+ return rc;
+
+ rc = pci_register_driver(&thunderx_ocx_driver);
+ if (rc)
+ goto err_lmc;
+
+ rc = pci_register_driver(&thunderx_l2c_driver);
+ if (rc)
+ goto err_ocx;
+
+ return rc;
+err_ocx:
+ pci_unregister_driver(&thunderx_ocx_driver);
+err_lmc:
+ pci_unregister_driver(&thunderx_lmc_driver);
+
+ return rc;
+}
+
+static void __exit thunderx_edac_exit(void)
+{
+ pci_unregister_driver(&thunderx_l2c_driver);
+ pci_unregister_driver(&thunderx_ocx_driver);
+ pci_unregister_driver(&thunderx_lmc_driver);
+
+}
+
+module_init(thunderx_edac_init);
+module_exit(thunderx_edac_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Cavium, Inc.");
+MODULE_DESCRIPTION("EDAC Driver for Cavium ThunderX");
projects / platform / kernel / linux-rpi.git / commitdiff