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![Aristeu Rozanski](/assets/img/avatar_default.png)
Both skx_edac and i10nm_edac drivers are loaded based on the matching CPU being available which leads the module to be automatically loaded in virtual machines as well. That will fail due the missing PCI devices. In both drivers the first function to make use of the PCI devices is skx_get_hi_lo() will simply print EDAC skx: Can't get tolm/tohm for each CPU core, which is noisy. This patch makes it a debug message. Signed-off-by: Aristeu Rozanski <aris@redhat.com> Signed-off-by: Tony Luck <tony.luck@intel.com> Link: https://lore.kernel.org/r/20191204212325.c4k47p5hrnn3vpb5@redhat.com
655 lines
16 KiB
C
655 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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*
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* Shared code by both skx_edac and i10nm_edac. Originally split out
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* from the skx_edac driver.
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*
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* This file is linked into both skx_edac and i10nm_edac drivers. In
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* order to avoid link errors, this file must be like a pure library
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* without including symbols and defines which would otherwise conflict,
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* when linked once into a module and into a built-in object, at the
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* same time. For example, __this_module symbol references when that
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* file is being linked into a built-in object.
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*
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* Copyright (c) 2018, Intel Corporation.
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*/
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#include <linux/acpi.h>
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#include <linux/dmi.h>
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#include <linux/adxl.h>
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#include <acpi/nfit.h>
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#include <asm/mce.h>
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#include "edac_module.h"
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#include "skx_common.h"
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static const char * const component_names[] = {
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[INDEX_SOCKET] = "ProcessorSocketId",
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[INDEX_MEMCTRL] = "MemoryControllerId",
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[INDEX_CHANNEL] = "ChannelId",
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[INDEX_DIMM] = "DimmSlotId",
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};
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static int component_indices[ARRAY_SIZE(component_names)];
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static int adxl_component_count;
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static const char * const *adxl_component_names;
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static u64 *adxl_values;
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static char *adxl_msg;
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static char skx_msg[MSG_SIZE];
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static skx_decode_f skx_decode;
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static skx_show_retry_log_f skx_show_retry_rd_err_log;
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static u64 skx_tolm, skx_tohm;
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static LIST_HEAD(dev_edac_list);
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int __init skx_adxl_get(void)
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{
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const char * const *names;
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int i, j;
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names = adxl_get_component_names();
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if (!names) {
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skx_printk(KERN_NOTICE, "No firmware support for address translation.\n");
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return -ENODEV;
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}
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for (i = 0; i < INDEX_MAX; i++) {
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for (j = 0; names[j]; j++) {
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if (!strcmp(component_names[i], names[j])) {
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component_indices[i] = j;
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break;
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}
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}
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if (!names[j])
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goto err;
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}
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adxl_component_names = names;
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while (*names++)
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adxl_component_count++;
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adxl_values = kcalloc(adxl_component_count, sizeof(*adxl_values),
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GFP_KERNEL);
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if (!adxl_values) {
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adxl_component_count = 0;
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return -ENOMEM;
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}
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adxl_msg = kzalloc(MSG_SIZE, GFP_KERNEL);
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if (!adxl_msg) {
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adxl_component_count = 0;
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kfree(adxl_values);
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return -ENOMEM;
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}
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return 0;
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err:
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skx_printk(KERN_ERR, "'%s' is not matched from DSM parameters: ",
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component_names[i]);
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for (j = 0; names[j]; j++)
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skx_printk(KERN_CONT, "%s ", names[j]);
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skx_printk(KERN_CONT, "\n");
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return -ENODEV;
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}
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void __exit skx_adxl_put(void)
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{
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kfree(adxl_values);
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kfree(adxl_msg);
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}
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static bool skx_adxl_decode(struct decoded_addr *res)
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{
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struct skx_dev *d;
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int i, len = 0;
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if (res->addr >= skx_tohm || (res->addr >= skx_tolm &&
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res->addr < BIT_ULL(32))) {
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edac_dbg(0, "Address 0x%llx out of range\n", res->addr);
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return false;
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}
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if (adxl_decode(res->addr, adxl_values)) {
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edac_dbg(0, "Failed to decode 0x%llx\n", res->addr);
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return false;
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}
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res->socket = (int)adxl_values[component_indices[INDEX_SOCKET]];
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res->imc = (int)adxl_values[component_indices[INDEX_MEMCTRL]];
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res->channel = (int)adxl_values[component_indices[INDEX_CHANNEL]];
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res->dimm = (int)adxl_values[component_indices[INDEX_DIMM]];
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if (res->imc > NUM_IMC - 1) {
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skx_printk(KERN_ERR, "Bad imc %d\n", res->imc);
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return false;
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}
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list_for_each_entry(d, &dev_edac_list, list) {
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if (d->imc[0].src_id == res->socket) {
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res->dev = d;
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break;
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}
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}
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if (!res->dev) {
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skx_printk(KERN_ERR, "No device for src_id %d imc %d\n",
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res->socket, res->imc);
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return false;
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}
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for (i = 0; i < adxl_component_count; i++) {
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if (adxl_values[i] == ~0x0ull)
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continue;
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len += snprintf(adxl_msg + len, MSG_SIZE - len, " %s:0x%llx",
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adxl_component_names[i], adxl_values[i]);
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if (MSG_SIZE - len <= 0)
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break;
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}
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return true;
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}
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void skx_set_decode(skx_decode_f decode, skx_show_retry_log_f show_retry_log)
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{
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skx_decode = decode;
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skx_show_retry_rd_err_log = show_retry_log;
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}
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int skx_get_src_id(struct skx_dev *d, int off, u8 *id)
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{
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u32 reg;
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if (pci_read_config_dword(d->util_all, off, ®)) {
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skx_printk(KERN_ERR, "Failed to read src id\n");
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return -ENODEV;
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}
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*id = GET_BITFIELD(reg, 12, 14);
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return 0;
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}
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int skx_get_node_id(struct skx_dev *d, u8 *id)
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{
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u32 reg;
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if (pci_read_config_dword(d->util_all, 0xf4, ®)) {
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skx_printk(KERN_ERR, "Failed to read node id\n");
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return -ENODEV;
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}
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*id = GET_BITFIELD(reg, 0, 2);
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return 0;
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}
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static int get_width(u32 mtr)
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{
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switch (GET_BITFIELD(mtr, 8, 9)) {
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case 0:
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return DEV_X4;
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case 1:
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return DEV_X8;
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case 2:
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return DEV_X16;
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}
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return DEV_UNKNOWN;
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}
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/*
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* We use the per-socket device @did to count how many sockets are present,
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* and to detemine which PCI buses are associated with each socket. Allocate
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* and build the full list of all the skx_dev structures that we need here.
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*/
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int skx_get_all_bus_mappings(unsigned int did, int off, enum type type,
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struct list_head **list)
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{
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struct pci_dev *pdev, *prev;
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struct skx_dev *d;
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u32 reg;
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int ndev = 0;
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prev = NULL;
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for (;;) {
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pdev = pci_get_device(PCI_VENDOR_ID_INTEL, did, prev);
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if (!pdev)
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break;
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ndev++;
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d = kzalloc(sizeof(*d), GFP_KERNEL);
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if (!d) {
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pci_dev_put(pdev);
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return -ENOMEM;
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}
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if (pci_read_config_dword(pdev, off, ®)) {
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kfree(d);
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pci_dev_put(pdev);
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skx_printk(KERN_ERR, "Failed to read bus idx\n");
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return -ENODEV;
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}
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d->bus[0] = GET_BITFIELD(reg, 0, 7);
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d->bus[1] = GET_BITFIELD(reg, 8, 15);
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if (type == SKX) {
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d->seg = pci_domain_nr(pdev->bus);
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d->bus[2] = GET_BITFIELD(reg, 16, 23);
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d->bus[3] = GET_BITFIELD(reg, 24, 31);
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} else {
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d->seg = GET_BITFIELD(reg, 16, 23);
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}
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edac_dbg(2, "busses: 0x%x, 0x%x, 0x%x, 0x%x\n",
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d->bus[0], d->bus[1], d->bus[2], d->bus[3]);
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list_add_tail(&d->list, &dev_edac_list);
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prev = pdev;
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}
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if (list)
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*list = &dev_edac_list;
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return ndev;
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}
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int skx_get_hi_lo(unsigned int did, int off[], u64 *tolm, u64 *tohm)
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{
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struct pci_dev *pdev;
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u32 reg;
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pdev = pci_get_device(PCI_VENDOR_ID_INTEL, did, NULL);
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if (!pdev) {
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edac_dbg(2, "Can't get tolm/tohm\n");
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return -ENODEV;
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}
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if (pci_read_config_dword(pdev, off[0], ®)) {
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skx_printk(KERN_ERR, "Failed to read tolm\n");
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goto fail;
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}
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skx_tolm = reg;
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if (pci_read_config_dword(pdev, off[1], ®)) {
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skx_printk(KERN_ERR, "Failed to read lower tohm\n");
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goto fail;
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}
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skx_tohm = reg;
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if (pci_read_config_dword(pdev, off[2], ®)) {
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skx_printk(KERN_ERR, "Failed to read upper tohm\n");
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goto fail;
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}
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skx_tohm |= (u64)reg << 32;
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pci_dev_put(pdev);
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*tolm = skx_tolm;
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*tohm = skx_tohm;
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edac_dbg(2, "tolm = 0x%llx tohm = 0x%llx\n", skx_tolm, skx_tohm);
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return 0;
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fail:
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pci_dev_put(pdev);
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return -ENODEV;
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}
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static int skx_get_dimm_attr(u32 reg, int lobit, int hibit, int add,
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int minval, int maxval, const char *name)
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{
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u32 val = GET_BITFIELD(reg, lobit, hibit);
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if (val < minval || val > maxval) {
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edac_dbg(2, "bad %s = %d (raw=0x%x)\n", name, val, reg);
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return -EINVAL;
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}
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return val + add;
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}
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#define numrank(reg) skx_get_dimm_attr(reg, 12, 13, 0, 0, 2, "ranks")
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#define numrow(reg) skx_get_dimm_attr(reg, 2, 4, 12, 1, 6, "rows")
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#define numcol(reg) skx_get_dimm_attr(reg, 0, 1, 10, 0, 2, "cols")
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int skx_get_dimm_info(u32 mtr, u32 amap, struct dimm_info *dimm,
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struct skx_imc *imc, int chan, int dimmno)
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{
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int banks = 16, ranks, rows, cols, npages;
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u64 size;
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ranks = numrank(mtr);
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rows = numrow(mtr);
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cols = numcol(mtr);
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/*
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* Compute size in 8-byte (2^3) words, then shift to MiB (2^20)
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*/
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size = ((1ull << (rows + cols + ranks)) * banks) >> (20 - 3);
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npages = MiB_TO_PAGES(size);
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edac_dbg(0, "mc#%d: channel %d, dimm %d, %lld MiB (%d pages) bank: %d, rank: %d, row: 0x%x, col: 0x%x\n",
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imc->mc, chan, dimmno, size, npages,
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banks, 1 << ranks, rows, cols);
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imc->chan[chan].dimms[dimmno].close_pg = GET_BITFIELD(mtr, 0, 0);
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imc->chan[chan].dimms[dimmno].bank_xor_enable = GET_BITFIELD(mtr, 9, 9);
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imc->chan[chan].dimms[dimmno].fine_grain_bank = GET_BITFIELD(amap, 0, 0);
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imc->chan[chan].dimms[dimmno].rowbits = rows;
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imc->chan[chan].dimms[dimmno].colbits = cols;
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dimm->nr_pages = npages;
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dimm->grain = 32;
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dimm->dtype = get_width(mtr);
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dimm->mtype = MEM_DDR4;
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dimm->edac_mode = EDAC_SECDED; /* likely better than this */
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snprintf(dimm->label, sizeof(dimm->label), "CPU_SrcID#%u_MC#%u_Chan#%u_DIMM#%u",
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imc->src_id, imc->lmc, chan, dimmno);
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return 1;
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}
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int skx_get_nvdimm_info(struct dimm_info *dimm, struct skx_imc *imc,
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int chan, int dimmno, const char *mod_str)
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{
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int smbios_handle;
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u32 dev_handle;
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u16 flags;
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u64 size = 0;
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dev_handle = ACPI_NFIT_BUILD_DEVICE_HANDLE(dimmno, chan, imc->lmc,
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imc->src_id, 0);
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smbios_handle = nfit_get_smbios_id(dev_handle, &flags);
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if (smbios_handle == -EOPNOTSUPP) {
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pr_warn_once("%s: Can't find size of NVDIMM. Try enabling CONFIG_ACPI_NFIT\n", mod_str);
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goto unknown_size;
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}
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if (smbios_handle < 0) {
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skx_printk(KERN_ERR, "Can't find handle for NVDIMM ADR=0x%x\n", dev_handle);
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goto unknown_size;
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}
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if (flags & ACPI_NFIT_MEM_MAP_FAILED) {
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skx_printk(KERN_ERR, "NVDIMM ADR=0x%x is not mapped\n", dev_handle);
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goto unknown_size;
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}
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size = dmi_memdev_size(smbios_handle);
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if (size == ~0ull)
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skx_printk(KERN_ERR, "Can't find size for NVDIMM ADR=0x%x/SMBIOS=0x%x\n",
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dev_handle, smbios_handle);
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unknown_size:
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dimm->nr_pages = size >> PAGE_SHIFT;
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dimm->grain = 32;
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dimm->dtype = DEV_UNKNOWN;
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dimm->mtype = MEM_NVDIMM;
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dimm->edac_mode = EDAC_SECDED; /* likely better than this */
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edac_dbg(0, "mc#%d: channel %d, dimm %d, %llu MiB (%u pages)\n",
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imc->mc, chan, dimmno, size >> 20, dimm->nr_pages);
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snprintf(dimm->label, sizeof(dimm->label), "CPU_SrcID#%u_MC#%u_Chan#%u_DIMM#%u",
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imc->src_id, imc->lmc, chan, dimmno);
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return (size == 0 || size == ~0ull) ? 0 : 1;
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}
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int skx_register_mci(struct skx_imc *imc, struct pci_dev *pdev,
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const char *ctl_name, const char *mod_str,
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get_dimm_config_f get_dimm_config)
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{
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struct mem_ctl_info *mci;
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struct edac_mc_layer layers[2];
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struct skx_pvt *pvt;
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int rc;
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/* Allocate a new MC control structure */
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layers[0].type = EDAC_MC_LAYER_CHANNEL;
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layers[0].size = NUM_CHANNELS;
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layers[0].is_virt_csrow = false;
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layers[1].type = EDAC_MC_LAYER_SLOT;
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layers[1].size = NUM_DIMMS;
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layers[1].is_virt_csrow = true;
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mci = edac_mc_alloc(imc->mc, ARRAY_SIZE(layers), layers,
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sizeof(struct skx_pvt));
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if (unlikely(!mci))
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return -ENOMEM;
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edac_dbg(0, "MC#%d: mci = %p\n", imc->mc, mci);
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/* Associate skx_dev and mci for future usage */
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imc->mci = mci;
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pvt = mci->pvt_info;
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pvt->imc = imc;
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mci->ctl_name = kasprintf(GFP_KERNEL, "%s#%d IMC#%d", ctl_name,
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imc->node_id, imc->lmc);
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if (!mci->ctl_name) {
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rc = -ENOMEM;
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goto fail0;
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}
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mci->mtype_cap = MEM_FLAG_DDR4 | MEM_FLAG_NVDIMM;
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mci->edac_ctl_cap = EDAC_FLAG_NONE;
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mci->edac_cap = EDAC_FLAG_NONE;
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mci->mod_name = mod_str;
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mci->dev_name = pci_name(pdev);
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mci->ctl_page_to_phys = NULL;
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rc = get_dimm_config(mci);
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if (rc < 0)
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goto fail;
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/* Record ptr to the generic device */
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mci->pdev = &pdev->dev;
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/* Add this new MC control structure to EDAC's list of MCs */
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if (unlikely(edac_mc_add_mc(mci))) {
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edac_dbg(0, "MC: failed edac_mc_add_mc()\n");
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rc = -EINVAL;
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goto fail;
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}
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return 0;
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fail:
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kfree(mci->ctl_name);
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fail0:
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edac_mc_free(mci);
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imc->mci = NULL;
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return rc;
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}
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static void skx_unregister_mci(struct skx_imc *imc)
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{
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struct mem_ctl_info *mci = imc->mci;
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if (!mci)
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return;
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edac_dbg(0, "MC%d: mci = %p\n", imc->mc, mci);
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/* Remove MC sysfs nodes */
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edac_mc_del_mc(mci->pdev);
|
|
|
|
edac_dbg(1, "%s: free mci struct\n", mci->ctl_name);
|
|
kfree(mci->ctl_name);
|
|
edac_mc_free(mci);
|
|
}
|
|
|
|
static void skx_mce_output_error(struct mem_ctl_info *mci,
|
|
const struct mce *m,
|
|
struct decoded_addr *res)
|
|
{
|
|
enum hw_event_mc_err_type tp_event;
|
|
char *optype;
|
|
bool ripv = GET_BITFIELD(m->mcgstatus, 0, 0);
|
|
bool overflow = GET_BITFIELD(m->status, 62, 62);
|
|
bool uncorrected_error = GET_BITFIELD(m->status, 61, 61);
|
|
bool recoverable;
|
|
int len;
|
|
u32 core_err_cnt = GET_BITFIELD(m->status, 38, 52);
|
|
u32 mscod = GET_BITFIELD(m->status, 16, 31);
|
|
u32 errcode = GET_BITFIELD(m->status, 0, 15);
|
|
u32 optypenum = GET_BITFIELD(m->status, 4, 6);
|
|
|
|
recoverable = GET_BITFIELD(m->status, 56, 56);
|
|
|
|
if (uncorrected_error) {
|
|
core_err_cnt = 1;
|
|
if (ripv) {
|
|
tp_event = HW_EVENT_ERR_FATAL;
|
|
} else {
|
|
tp_event = HW_EVENT_ERR_UNCORRECTED;
|
|
}
|
|
} else {
|
|
tp_event = HW_EVENT_ERR_CORRECTED;
|
|
}
|
|
|
|
/*
|
|
* According to Intel Architecture spec vol 3B,
|
|
* Table 15-10 "IA32_MCi_Status [15:0] Compound Error Code Encoding"
|
|
* memory errors should fit one of these masks:
|
|
* 000f 0000 1mmm cccc (binary)
|
|
* 000f 0010 1mmm cccc (binary) [RAM used as cache]
|
|
* where:
|
|
* f = Correction Report Filtering Bit. If 1, subsequent errors
|
|
* won't be shown
|
|
* mmm = error type
|
|
* cccc = channel
|
|
* If the mask doesn't match, report an error to the parsing logic
|
|
*/
|
|
if (!((errcode & 0xef80) == 0x80 || (errcode & 0xef80) == 0x280)) {
|
|
optype = "Can't parse: it is not a mem";
|
|
} else {
|
|
switch (optypenum) {
|
|
case 0:
|
|
optype = "generic undef request error";
|
|
break;
|
|
case 1:
|
|
optype = "memory read error";
|
|
break;
|
|
case 2:
|
|
optype = "memory write error";
|
|
break;
|
|
case 3:
|
|
optype = "addr/cmd error";
|
|
break;
|
|
case 4:
|
|
optype = "memory scrubbing error";
|
|
break;
|
|
default:
|
|
optype = "reserved";
|
|
break;
|
|
}
|
|
}
|
|
if (adxl_component_count) {
|
|
len = snprintf(skx_msg, MSG_SIZE, "%s%s err_code:0x%04x:0x%04x %s",
|
|
overflow ? " OVERFLOW" : "",
|
|
(uncorrected_error && recoverable) ? " recoverable" : "",
|
|
mscod, errcode, adxl_msg);
|
|
} else {
|
|
len = snprintf(skx_msg, MSG_SIZE,
|
|
"%s%s err_code:0x%04x:0x%04x socket:%d imc:%d rank:%d bg:%d ba:%d row:0x%x col:0x%x",
|
|
overflow ? " OVERFLOW" : "",
|
|
(uncorrected_error && recoverable) ? " recoverable" : "",
|
|
mscod, errcode,
|
|
res->socket, res->imc, res->rank,
|
|
res->bank_group, res->bank_address, res->row, res->column);
|
|
}
|
|
|
|
if (skx_show_retry_rd_err_log)
|
|
skx_show_retry_rd_err_log(res, skx_msg + len, MSG_SIZE - len);
|
|
|
|
edac_dbg(0, "%s\n", skx_msg);
|
|
|
|
/* Call the helper to output message */
|
|
edac_mc_handle_error(tp_event, mci, core_err_cnt,
|
|
m->addr >> PAGE_SHIFT, m->addr & ~PAGE_MASK, 0,
|
|
res->channel, res->dimm, -1,
|
|
optype, skx_msg);
|
|
}
|
|
|
|
int skx_mce_check_error(struct notifier_block *nb, unsigned long val,
|
|
void *data)
|
|
{
|
|
struct mce *mce = (struct mce *)data;
|
|
struct decoded_addr res;
|
|
struct mem_ctl_info *mci;
|
|
char *type;
|
|
|
|
if (edac_get_report_status() == EDAC_REPORTING_DISABLED)
|
|
return NOTIFY_DONE;
|
|
|
|
/* ignore unless this is memory related with an address */
|
|
if ((mce->status & 0xefff) >> 7 != 1 || !(mce->status & MCI_STATUS_ADDRV))
|
|
return NOTIFY_DONE;
|
|
|
|
memset(&res, 0, sizeof(res));
|
|
res.addr = mce->addr;
|
|
|
|
if (adxl_component_count) {
|
|
if (!skx_adxl_decode(&res))
|
|
return NOTIFY_DONE;
|
|
} else if (!skx_decode || !skx_decode(&res)) {
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
mci = res.dev->imc[res.imc].mci;
|
|
|
|
if (!mci)
|
|
return NOTIFY_DONE;
|
|
|
|
if (mce->mcgstatus & MCG_STATUS_MCIP)
|
|
type = "Exception";
|
|
else
|
|
type = "Event";
|
|
|
|
skx_mc_printk(mci, KERN_DEBUG, "HANDLING MCE MEMORY ERROR\n");
|
|
|
|
skx_mc_printk(mci, KERN_DEBUG, "CPU %d: Machine Check %s: 0x%llx "
|
|
"Bank %d: 0x%llx\n", mce->extcpu, type,
|
|
mce->mcgstatus, mce->bank, mce->status);
|
|
skx_mc_printk(mci, KERN_DEBUG, "TSC 0x%llx ", mce->tsc);
|
|
skx_mc_printk(mci, KERN_DEBUG, "ADDR 0x%llx ", mce->addr);
|
|
skx_mc_printk(mci, KERN_DEBUG, "MISC 0x%llx ", mce->misc);
|
|
|
|
skx_mc_printk(mci, KERN_DEBUG, "PROCESSOR %u:0x%x TIME %llu SOCKET "
|
|
"%u APIC 0x%x\n", mce->cpuvendor, mce->cpuid,
|
|
mce->time, mce->socketid, mce->apicid);
|
|
|
|
skx_mce_output_error(mci, mce, &res);
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
void skx_remove(void)
|
|
{
|
|
int i, j;
|
|
struct skx_dev *d, *tmp;
|
|
|
|
edac_dbg(0, "\n");
|
|
|
|
list_for_each_entry_safe(d, tmp, &dev_edac_list, list) {
|
|
list_del(&d->list);
|
|
for (i = 0; i < NUM_IMC; i++) {
|
|
if (d->imc[i].mci)
|
|
skx_unregister_mci(&d->imc[i]);
|
|
|
|
if (d->imc[i].mdev)
|
|
pci_dev_put(d->imc[i].mdev);
|
|
|
|
if (d->imc[i].mbase)
|
|
iounmap(d->imc[i].mbase);
|
|
|
|
for (j = 0; j < NUM_CHANNELS; j++) {
|
|
if (d->imc[i].chan[j].cdev)
|
|
pci_dev_put(d->imc[i].chan[j].cdev);
|
|
}
|
|
}
|
|
if (d->util_all)
|
|
pci_dev_put(d->util_all);
|
|
if (d->sad_all)
|
|
pci_dev_put(d->sad_all);
|
|
if (d->uracu)
|
|
pci_dev_put(d->uracu);
|
|
|
|
kfree(d);
|
|
}
|
|
}
|