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Release 4.11 drivers/edac/amd64_edac_inj.c

Directory: drivers/edac
#include "amd64_edac.h"


static ssize_t amd64_inject_section_show(struct device *dev, struct device_attribute *mattr, char *buf) { struct mem_ctl_info *mci = to_mci(dev); struct amd64_pvt *pvt = mci->pvt_info; return sprintf(buf, "0x%x\n", pvt->injection.section); }

Contributors

PersonTokensPropCommitsCommitProp
Borislav Petkov3667.92%150.00%
Mauro Carvalho Chehab1732.08%150.00%
Total53100.00%2100.00%

/* * store error injection section value which refers to one of 4 16-byte sections * within a 64-byte cacheline * * range: 0..3 */
static ssize_t amd64_inject_section_store(struct device *dev, struct device_attribute *mattr, const char *data, size_t count) { struct mem_ctl_info *mci = to_mci(dev); struct amd64_pvt *pvt = mci->pvt_info; unsigned long value; int ret; ret = kstrtoul(data, 10, &value); if (ret < 0) return ret; if (value > 3) { amd64_warn("%s: invalid section 0x%lx\n", __func__, value); return -EINVAL; } pvt->injection.section = (u32) value; return count; }

Contributors

PersonTokensPropCommitsCommitProp
Doug Thompson6258.49%116.67%
Borislav Petkov2624.53%350.00%
Mauro Carvalho Chehab1716.04%116.67%
Jingoo Han10.94%116.67%
Total106100.00%6100.00%


static ssize_t amd64_inject_word_show(struct device *dev, struct device_attribute *mattr, char *buf) { struct mem_ctl_info *mci = to_mci(dev); struct amd64_pvt *pvt = mci->pvt_info; return sprintf(buf, "0x%x\n", pvt->injection.word); }

Contributors

PersonTokensPropCommitsCommitProp
Borislav Petkov3667.92%150.00%
Mauro Carvalho Chehab1732.08%150.00%
Total53100.00%2100.00%

/* * store error injection word value which refers to one of 9 16-bit word of the * 16-byte (128-bit + ECC bits) section * * range: 0..8 */
static ssize_t amd64_inject_word_store(struct device *dev, struct device_attribute *mattr, const char *data, size_t count) { struct mem_ctl_info *mci = to_mci(dev); struct amd64_pvt *pvt = mci->pvt_info; unsigned long value; int ret; ret = kstrtoul(data, 10, &value); if (ret < 0) return ret; if (value > 8) { amd64_warn("%s: invalid word 0x%lx\n", __func__, value); return -EINVAL; } pvt->injection.word = (u32) value; return count; }

Contributors

PersonTokensPropCommitsCommitProp
Doug Thompson6662.26%116.67%
Borislav Petkov2220.75%350.00%
Mauro Carvalho Chehab1716.04%116.67%
Jingoo Han10.94%116.67%
Total106100.00%6100.00%


static ssize_t amd64_inject_ecc_vector_show(struct device *dev, struct device_attribute *mattr, char *buf) { struct mem_ctl_info *mci = to_mci(dev); struct amd64_pvt *pvt = mci->pvt_info; return sprintf(buf, "0x%x\n", pvt->injection.bit_map); }

Contributors

PersonTokensPropCommitsCommitProp
Borislav Petkov3667.92%150.00%
Mauro Carvalho Chehab1732.08%150.00%
Total53100.00%2100.00%

/* * store 16 bit error injection vector which enables injecting errors to the * corresponding bit within the error injection word above. When used during a * DRAM ECC read, it holds the contents of the of the DRAM ECC bits. */
static ssize_t amd64_inject_ecc_vector_store(struct device *dev, struct device_attribute *mattr, const char *data, size_t count) { struct mem_ctl_info *mci = to_mci(dev); struct amd64_pvt *pvt = mci->pvt_info; unsigned long value; int ret; ret = kstrtoul(data, 16, &value); if (ret < 0) return ret; if (value & 0xFFFF0000) { amd64_warn("%s: invalid EccVector: 0x%lx\n", __func__, value); return -EINVAL; } pvt->injection.bit_map = (u32) value; return count; }

Contributors

PersonTokensPropCommitsCommitProp
Doug Thompson6258.49%116.67%
Borislav Petkov2624.53%350.00%
Mauro Carvalho Chehab1716.04%116.67%
Jingoo Han10.94%116.67%
Total106100.00%6100.00%

/* * Do a DRAM ECC read. Assemble staged values in the pvt area, format into * fields needed by the injection registers and read the NB Array Data Port. */
static ssize_t amd64_inject_read_store(struct device *dev, struct device_attribute *mattr, const char *data, size_t count) { struct mem_ctl_info *mci = to_mci(dev); struct amd64_pvt *pvt = mci->pvt_info; unsigned long value; u32 section, word_bits; int ret; ret = kstrtoul(data, 10, &value); if (ret < 0) return ret; /* Form value to choose 16-byte section of cacheline */ section = F10_NB_ARRAY_DRAM | SET_NB_ARRAY_ADDR(pvt->injection.section); amd64_write_pci_cfg(pvt->F3, F10_NB_ARRAY_ADDR, section); word_bits = SET_NB_DRAM_INJECTION_READ(pvt->injection); /* Issue 'word' and 'bit' along with the READ request */ amd64_write_pci_cfg(pvt->F3, F10_NB_ARRAY_DATA, word_bits); edac_dbg(0, "section=0x%x word_bits=0x%x\n", section, word_bits); return count; }

Contributors

PersonTokensPropCommitsCommitProp
Doug Thompson10476.47%114.29%
Mauro Carvalho Chehab1712.50%114.29%
Borislav Petkov118.09%342.86%
Joe Perches32.21%114.29%
Jingoo Han10.74%114.29%
Total136100.00%7100.00%

/* * Do a DRAM ECC write. Assemble staged values in the pvt area and format into * fields needed by the injection registers. */
static ssize_t amd64_inject_write_store(struct device *dev, struct device_attribute *mattr, const char *data, size_t count) { struct mem_ctl_info *mci = to_mci(dev); struct amd64_pvt *pvt = mci->pvt_info; u32 section, word_bits, tmp; unsigned long value; int ret; ret = kstrtoul(data, 10, &value); if (ret < 0) return ret; /* Form value to choose 16-byte section of cacheline */ section = F10_NB_ARRAY_DRAM | SET_NB_ARRAY_ADDR(pvt->injection.section); amd64_write_pci_cfg(pvt->F3, F10_NB_ARRAY_ADDR, section); word_bits = SET_NB_DRAM_INJECTION_WRITE(pvt->injection); pr_notice_once("Don't forget to decrease MCE polling interval in\n" "/sys/bus/machinecheck/devices/machinecheck<CPUNUM>/check_interval\n" "so that you can get the error report faster.\n"); on_each_cpu(disable_caches, NULL, 1); /* Issue 'word' and 'bit' along with the READ request */ amd64_write_pci_cfg(pvt->F3, F10_NB_ARRAY_DATA, word_bits); retry: /* wait until injection happens */ amd64_read_pci_cfg(pvt->F3, F10_NB_ARRAY_DATA, &tmp); if (tmp & F10_NB_ARR_ECC_WR_REQ) { cpu_relax(); goto retry; } on_each_cpu(enable_caches, NULL, 1); edac_dbg(0, "section=0x%x word_bits=0x%x\n", section, word_bits); return count; }

Contributors

PersonTokensPropCommitsCommitProp
Doug Thompson10052.08%112.50%
Borislav Petkov7136.98%450.00%
Mauro Carvalho Chehab178.85%112.50%
Joe Perches31.56%112.50%
Jingoo Han10.52%112.50%
Total192100.00%8100.00%

/* * update NUM_INJ_ATTRS in case you add new members */ static DEVICE_ATTR(inject_section, S_IRUGO | S_IWUSR, amd64_inject_section_show, amd64_inject_section_store); static DEVICE_ATTR(inject_word, S_IRUGO | S_IWUSR, amd64_inject_word_show, amd64_inject_word_store); static DEVICE_ATTR(inject_ecc_vector, S_IRUGO | S_IWUSR, amd64_inject_ecc_vector_show, amd64_inject_ecc_vector_store); static DEVICE_ATTR(inject_write, S_IWUSR, NULL, amd64_inject_write_store); static DEVICE_ATTR(inject_read, S_IWUSR, NULL, amd64_inject_read_store); static struct attribute *amd64_edac_inj_attrs[] = { &dev_attr_inject_section.attr, &dev_attr_inject_word.attr, &dev_attr_inject_ecc_vector.attr, &dev_attr_inject_write.attr, &dev_attr_inject_read.attr, NULL };
static umode_t amd64_edac_inj_is_visible(struct kobject *kobj, struct attribute *attr, int idx) { struct device *dev = kobj_to_dev(kobj); struct mem_ctl_info *mci = container_of(dev, struct mem_ctl_info, dev); struct amd64_pvt *pvt = mci->pvt_info; if (pvt->fam < 0x10) return 0; return attr->mode; }

Contributors

PersonTokensPropCommitsCommitProp
Takashi Iwai5376.81%150.00%
Mauro Carvalho Chehab1623.19%150.00%
Total69100.00%2100.00%

const struct attribute_group amd64_edac_inj_group = { .attrs = amd64_edac_inj_attrs, .is_visible = amd64_edac_inj_is_visible, };

Overall Contributors

PersonTokensPropCommitsCommitProp
Doug Thompson42142.02%19.09%
Borislav Petkov26726.65%654.55%
Mauro Carvalho Chehab21121.06%19.09%
Takashi Iwai929.18%19.09%
Joe Perches60.60%19.09%
Jingoo Han50.50%19.09%
Total1002100.00%11100.00%
Directory: drivers/edac
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