Douglas Thompson | 20bcb7a | 2007-07-19 01:49:47 -0700 | [diff] [blame] | 1 | /* |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 2 | * (C) 2005, 2006 Linux Networx (http://lnxi.com) |
| 3 | * This file may be distributed under the terms of the |
| 4 | * GNU General Public License. |
| 5 | * |
| 6 | * Written Doug Thompson <norsk5@xmission.com> |
| 7 | * |
| 8 | */ |
| 9 | #include <linux/module.h> |
Borislav Petkov | 30e1f7a | 2010-09-02 17:26:48 +0200 | [diff] [blame] | 10 | #include <linux/edac.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 11 | #include <linux/slab.h> |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 12 | #include <linux/ctype.h> |
| 13 | |
Mauro Carvalho Chehab | 0b892c7 | 2016-10-29 09:56:00 -0200 | [diff] [blame] | 14 | #include "edac_pci.h" |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 15 | #include "edac_module.h" |
| 16 | |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 17 | #define EDAC_PCI_SYMLINK "device" |
| 18 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 19 | /* data variables exported via sysfs */ |
| 20 | static int check_pci_errors; /* default NO check PCI parity */ |
| 21 | static int edac_pci_panic_on_pe; /* default NO panic on PCI Parity */ |
| 22 | static int edac_pci_log_pe = 1; /* log PCI parity errors */ |
Dave Jiang | 4de78c6 | 2007-07-19 01:49:54 -0700 | [diff] [blame] | 23 | static int edac_pci_log_npe = 1; /* log PCI non-parity error errors */ |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 24 | static int edac_pci_poll_msec = 1000; /* one second workq period */ |
| 25 | |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 26 | static atomic_t pci_parity_count = ATOMIC_INIT(0); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 27 | static atomic_t pci_nonparity_count = ATOMIC_INIT(0); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 28 | |
Arthur Jones | 14cc571 | 2008-07-25 01:49:08 -0700 | [diff] [blame] | 29 | static struct kobject *edac_pci_top_main_kobj; |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 30 | static atomic_t edac_pci_sysfs_refcount = ATOMIC_INIT(0); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 31 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 32 | /* getter functions for the data variables */ |
Dave Jiang | 4de78c6 | 2007-07-19 01:49:54 -0700 | [diff] [blame] | 33 | int edac_pci_get_check_errors(void) |
| 34 | { |
| 35 | return check_pci_errors; |
| 36 | } |
| 37 | |
Adrian Bunk | 1a45027 | 2008-04-29 01:03:18 -0700 | [diff] [blame] | 38 | static int edac_pci_get_log_pe(void) |
Dave Jiang | 4de78c6 | 2007-07-19 01:49:54 -0700 | [diff] [blame] | 39 | { |
| 40 | return edac_pci_log_pe; |
| 41 | } |
| 42 | |
Adrian Bunk | 1a45027 | 2008-04-29 01:03:18 -0700 | [diff] [blame] | 43 | static int edac_pci_get_log_npe(void) |
Dave Jiang | 4de78c6 | 2007-07-19 01:49:54 -0700 | [diff] [blame] | 44 | { |
| 45 | return edac_pci_log_npe; |
| 46 | } |
| 47 | |
Adrian Bunk | 1a45027 | 2008-04-29 01:03:18 -0700 | [diff] [blame] | 48 | static int edac_pci_get_panic_on_pe(void) |
Dave Jiang | 4de78c6 | 2007-07-19 01:49:54 -0700 | [diff] [blame] | 49 | { |
| 50 | return edac_pci_panic_on_pe; |
| 51 | } |
| 52 | |
| 53 | int edac_pci_get_poll_msec(void) |
| 54 | { |
| 55 | return edac_pci_poll_msec; |
| 56 | } |
| 57 | |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 58 | /**************************** EDAC PCI sysfs instance *******************/ |
| 59 | static ssize_t instance_pe_count_show(struct edac_pci_ctl_info *pci, char *data) |
| 60 | { |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 61 | return sprintf(data, "%u\n", atomic_read(&pci->counters.pe_count)); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 62 | } |
| 63 | |
| 64 | static ssize_t instance_npe_count_show(struct edac_pci_ctl_info *pci, |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 65 | char *data) |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 66 | { |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 67 | return sprintf(data, "%u\n", atomic_read(&pci->counters.npe_count)); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 68 | } |
| 69 | |
| 70 | #define to_instance(k) container_of(k, struct edac_pci_ctl_info, kobj) |
| 71 | #define to_instance_attr(a) container_of(a, struct instance_attribute, attr) |
| 72 | |
| 73 | /* DEVICE instance kobject release() function */ |
| 74 | static void edac_pci_instance_release(struct kobject *kobj) |
| 75 | { |
| 76 | struct edac_pci_ctl_info *pci; |
| 77 | |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 78 | edac_dbg(0, "\n"); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 79 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 80 | /* Form pointer to containing struct, the pci control struct */ |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 81 | pci = to_instance(kobj); |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 82 | |
| 83 | /* decrement reference count on top main kobj */ |
Arthur Jones | 14cc571 | 2008-07-25 01:49:08 -0700 | [diff] [blame] | 84 | kobject_put(edac_pci_top_main_kobj); |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 85 | |
| 86 | kfree(pci); /* Free the control struct */ |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 87 | } |
| 88 | |
| 89 | /* instance specific attribute structure */ |
| 90 | struct instance_attribute { |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 91 | struct attribute attr; |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 92 | ssize_t(*show) (struct edac_pci_ctl_info *, char *); |
| 93 | ssize_t(*store) (struct edac_pci_ctl_info *, const char *, size_t); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 94 | }; |
| 95 | |
| 96 | /* Function to 'show' fields from the edac_pci 'instance' structure */ |
| 97 | static ssize_t edac_pci_instance_show(struct kobject *kobj, |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 98 | struct attribute *attr, char *buffer) |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 99 | { |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 100 | struct edac_pci_ctl_info *pci = to_instance(kobj); |
| 101 | struct instance_attribute *instance_attr = to_instance_attr(attr); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 102 | |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 103 | if (instance_attr->show) |
| 104 | return instance_attr->show(pci, buffer); |
| 105 | return -EIO; |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 106 | } |
| 107 | |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 108 | /* Function to 'store' fields into the edac_pci 'instance' structure */ |
| 109 | static ssize_t edac_pci_instance_store(struct kobject *kobj, |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 110 | struct attribute *attr, |
| 111 | const char *buffer, size_t count) |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 112 | { |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 113 | struct edac_pci_ctl_info *pci = to_instance(kobj); |
| 114 | struct instance_attribute *instance_attr = to_instance_attr(attr); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 115 | |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 116 | if (instance_attr->store) |
| 117 | return instance_attr->store(pci, buffer, count); |
| 118 | return -EIO; |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 119 | } |
| 120 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 121 | /* fs_ops table */ |
Emese Revfy | 52cf25d | 2010-01-19 02:58:23 +0100 | [diff] [blame] | 122 | static const struct sysfs_ops pci_instance_ops = { |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 123 | .show = edac_pci_instance_show, |
| 124 | .store = edac_pci_instance_store |
| 125 | }; |
| 126 | |
| 127 | #define INSTANCE_ATTR(_name, _mode, _show, _store) \ |
| 128 | static struct instance_attribute attr_instance_##_name = { \ |
| 129 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 130 | .show = _show, \ |
| 131 | .store = _store, \ |
| 132 | }; |
| 133 | |
| 134 | INSTANCE_ATTR(pe_count, S_IRUGO, instance_pe_count_show, NULL); |
| 135 | INSTANCE_ATTR(npe_count, S_IRUGO, instance_npe_count_show, NULL); |
| 136 | |
| 137 | /* pci instance attributes */ |
Greg Kroah-Hartman | 625c6b5 | 2022-01-04 12:24:01 +0100 | [diff] [blame] | 138 | static struct attribute *pci_instance_attrs[] = { |
Greg Kroah-Hartman | 1141389 | 2022-01-04 12:24:00 +0100 | [diff] [blame] | 139 | &attr_instance_pe_count.attr, |
| 140 | &attr_instance_npe_count.attr, |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 141 | NULL |
| 142 | }; |
Greg Kroah-Hartman | 625c6b5 | 2022-01-04 12:24:01 +0100 | [diff] [blame] | 143 | ATTRIBUTE_GROUPS(pci_instance); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 144 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 145 | /* the ktype for a pci instance */ |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 146 | static struct kobj_type ktype_pci_instance = { |
| 147 | .release = edac_pci_instance_release, |
| 148 | .sysfs_ops = &pci_instance_ops, |
Greg Kroah-Hartman | 625c6b5 | 2022-01-04 12:24:01 +0100 | [diff] [blame] | 149 | .default_groups = pci_instance_groups, |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 150 | }; |
| 151 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 152 | /* |
| 153 | * edac_pci_create_instance_kobj |
| 154 | * |
| 155 | * construct one EDAC PCI instance's kobject for use |
| 156 | */ |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 157 | static int edac_pci_create_instance_kobj(struct edac_pci_ctl_info *pci, int idx) |
| 158 | { |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 159 | struct kobject *main_kobj; |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 160 | int err; |
| 161 | |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 162 | edac_dbg(0, "\n"); |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 163 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 164 | /* First bump the ref count on the top main kobj, which will |
| 165 | * track the number of PCI instances we have, and thus nest |
| 166 | * properly on keeping the module loaded |
| 167 | */ |
Arthur Jones | 14cc571 | 2008-07-25 01:49:08 -0700 | [diff] [blame] | 168 | main_kobj = kobject_get(edac_pci_top_main_kobj); |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 169 | if (!main_kobj) { |
| 170 | err = -ENODEV; |
| 171 | goto error_out; |
| 172 | } |
| 173 | |
| 174 | /* And now register this new kobject under the main kobj */ |
Greg Kroah-Hartman | b2ed215 | 2007-12-17 15:54:39 -0400 | [diff] [blame] | 175 | err = kobject_init_and_add(&pci->kobj, &ktype_pci_instance, |
Arthur Jones | 14cc571 | 2008-07-25 01:49:08 -0700 | [diff] [blame] | 176 | edac_pci_top_main_kobj, "pci%d", idx); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 177 | if (err != 0) { |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 178 | edac_dbg(2, "failed to register instance pci%d\n", idx); |
Arthur Jones | 14cc571 | 2008-07-25 01:49:08 -0700 | [diff] [blame] | 179 | kobject_put(edac_pci_top_main_kobj); |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 180 | goto error_out; |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 181 | } |
| 182 | |
Greg Kroah-Hartman | b2ed215 | 2007-12-17 15:54:39 -0400 | [diff] [blame] | 183 | kobject_uevent(&pci->kobj, KOBJ_ADD); |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 184 | edac_dbg(1, "Register instance 'pci%d' kobject\n", idx); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 185 | |
| 186 | return 0; |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 187 | |
| 188 | /* Error unwind statck */ |
| 189 | error_out: |
| 190 | return err; |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 191 | } |
| 192 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 193 | /* |
| 194 | * edac_pci_unregister_sysfs_instance_kobj |
| 195 | * |
| 196 | * unregister the kobj for the EDAC PCI instance |
| 197 | */ |
Adrian Bunk | 1a45027 | 2008-04-29 01:03:18 -0700 | [diff] [blame] | 198 | static void edac_pci_unregister_sysfs_instance_kobj( |
| 199 | struct edac_pci_ctl_info *pci) |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 200 | { |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 201 | edac_dbg(0, "\n"); |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 202 | |
| 203 | /* Unregister the instance kobject and allow its release |
| 204 | * function release the main reference count and then |
| 205 | * kfree the memory |
| 206 | */ |
Greg Kroah-Hartman | c10997f | 2007-12-20 08:13:05 -0800 | [diff] [blame] | 207 | kobject_put(&pci->kobj); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 208 | } |
| 209 | |
| 210 | /***************************** EDAC PCI sysfs root **********************/ |
| 211 | #define to_edacpci(k) container_of(k, struct edac_pci_ctl_info, kobj) |
| 212 | #define to_edacpci_attr(a) container_of(a, struct edac_pci_attr, attr) |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 213 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 214 | /* simple show/store functions for attributes */ |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 215 | static ssize_t edac_pci_int_show(void *ptr, char *buffer) |
| 216 | { |
| 217 | int *value = ptr; |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 218 | return sprintf(buffer, "%d\n", *value); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 219 | } |
| 220 | |
| 221 | static ssize_t edac_pci_int_store(void *ptr, const char *buffer, size_t count) |
| 222 | { |
| 223 | int *value = ptr; |
| 224 | |
| 225 | if (isdigit(*buffer)) |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 226 | *value = simple_strtoul(buffer, NULL, 0); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 227 | |
| 228 | return count; |
| 229 | } |
| 230 | |
| 231 | struct edac_pci_dev_attribute { |
| 232 | struct attribute attr; |
| 233 | void *value; |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 234 | ssize_t(*show) (void *, char *); |
| 235 | ssize_t(*store) (void *, const char *, size_t); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 236 | }; |
| 237 | |
| 238 | /* Set of show/store abstract level functions for PCI Parity object */ |
| 239 | static ssize_t edac_pci_dev_show(struct kobject *kobj, struct attribute *attr, |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 240 | char *buffer) |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 241 | { |
| 242 | struct edac_pci_dev_attribute *edac_pci_dev; |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 243 | edac_pci_dev = (struct edac_pci_dev_attribute *)attr; |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 244 | |
| 245 | if (edac_pci_dev->show) |
| 246 | return edac_pci_dev->show(edac_pci_dev->value, buffer); |
| 247 | return -EIO; |
| 248 | } |
| 249 | |
| 250 | static ssize_t edac_pci_dev_store(struct kobject *kobj, |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 251 | struct attribute *attr, const char *buffer, |
| 252 | size_t count) |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 253 | { |
| 254 | struct edac_pci_dev_attribute *edac_pci_dev; |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 255 | edac_pci_dev = (struct edac_pci_dev_attribute *)attr; |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 256 | |
Dan Carpenter | 8024c4c | 2013-01-26 10:49:24 +0300 | [diff] [blame] | 257 | if (edac_pci_dev->store) |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 258 | return edac_pci_dev->store(edac_pci_dev->value, buffer, count); |
| 259 | return -EIO; |
| 260 | } |
| 261 | |
Emese Revfy | 52cf25d | 2010-01-19 02:58:23 +0100 | [diff] [blame] | 262 | static const struct sysfs_ops edac_pci_sysfs_ops = { |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 263 | .show = edac_pci_dev_show, |
| 264 | .store = edac_pci_dev_store |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 265 | }; |
| 266 | |
| 267 | #define EDAC_PCI_ATTR(_name,_mode,_show,_store) \ |
| 268 | static struct edac_pci_dev_attribute edac_pci_attr_##_name = { \ |
| 269 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 270 | .value = &_name, \ |
| 271 | .show = _show, \ |
| 272 | .store = _store, \ |
| 273 | }; |
| 274 | |
| 275 | #define EDAC_PCI_STRING_ATTR(_name,_data,_mode,_show,_store) \ |
| 276 | static struct edac_pci_dev_attribute edac_pci_attr_##_name = { \ |
| 277 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 278 | .value = _data, \ |
| 279 | .show = _show, \ |
| 280 | .store = _store, \ |
| 281 | }; |
| 282 | |
| 283 | /* PCI Parity control files */ |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 284 | EDAC_PCI_ATTR(check_pci_errors, S_IRUGO | S_IWUSR, edac_pci_int_show, |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 285 | edac_pci_int_store); |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 286 | EDAC_PCI_ATTR(edac_pci_log_pe, S_IRUGO | S_IWUSR, edac_pci_int_show, |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 287 | edac_pci_int_store); |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 288 | EDAC_PCI_ATTR(edac_pci_log_npe, S_IRUGO | S_IWUSR, edac_pci_int_show, |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 289 | edac_pci_int_store); |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 290 | EDAC_PCI_ATTR(edac_pci_panic_on_pe, S_IRUGO | S_IWUSR, edac_pci_int_show, |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 291 | edac_pci_int_store); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 292 | EDAC_PCI_ATTR(pci_parity_count, S_IRUGO, edac_pci_int_show, NULL); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 293 | EDAC_PCI_ATTR(pci_nonparity_count, S_IRUGO, edac_pci_int_show, NULL); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 294 | |
| 295 | /* Base Attributes of the memory ECC object */ |
Greg Kroah-Hartman | 625c6b5 | 2022-01-04 12:24:01 +0100 | [diff] [blame] | 296 | static struct attribute *edac_pci_attrs[] = { |
Greg Kroah-Hartman | 1141389 | 2022-01-04 12:24:00 +0100 | [diff] [blame] | 297 | &edac_pci_attr_check_pci_errors.attr, |
| 298 | &edac_pci_attr_edac_pci_log_pe.attr, |
| 299 | &edac_pci_attr_edac_pci_log_npe.attr, |
| 300 | &edac_pci_attr_edac_pci_panic_on_pe.attr, |
| 301 | &edac_pci_attr_pci_parity_count.attr, |
| 302 | &edac_pci_attr_pci_nonparity_count.attr, |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 303 | NULL, |
| 304 | }; |
Greg Kroah-Hartman | 625c6b5 | 2022-01-04 12:24:01 +0100 | [diff] [blame] | 305 | ATTRIBUTE_GROUPS(edac_pci); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 306 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 307 | /* |
| 308 | * edac_pci_release_main_kobj |
| 309 | * |
| 310 | * This release function is called when the reference count to the |
| 311 | * passed kobj goes to zero. |
| 312 | * |
| 313 | * This kobj is the 'main' kobject that EDAC PCI instances |
| 314 | * link to, and thus provide for proper nesting counts |
| 315 | */ |
| 316 | static void edac_pci_release_main_kobj(struct kobject *kobj) |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 317 | { |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 318 | edac_dbg(0, "here to module_put(THIS_MODULE)\n"); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 319 | |
Arthur Jones | 14cc571 | 2008-07-25 01:49:08 -0700 | [diff] [blame] | 320 | kfree(kobj); |
| 321 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 322 | /* last reference to top EDAC PCI kobject has been removed, |
| 323 | * NOW release our ref count on the core module |
| 324 | */ |
| 325 | module_put(THIS_MODULE); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 326 | } |
| 327 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 328 | /* ktype struct for the EDAC PCI main kobj */ |
| 329 | static struct kobj_type ktype_edac_pci_main_kobj = { |
| 330 | .release = edac_pci_release_main_kobj, |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 331 | .sysfs_ops = &edac_pci_sysfs_ops, |
Greg Kroah-Hartman | 625c6b5 | 2022-01-04 12:24:01 +0100 | [diff] [blame] | 332 | .default_groups = edac_pci_groups, |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 333 | }; |
| 334 | |
| 335 | /** |
Borislav Petkov | d453800 | 2015-11-30 14:20:41 +0100 | [diff] [blame] | 336 | * edac_pci_main_kobj_setup: Setup the sysfs for EDAC PCI attributes. |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 337 | */ |
Adrian Bunk | 1a45027 | 2008-04-29 01:03:18 -0700 | [diff] [blame] | 338 | static int edac_pci_main_kobj_setup(void) |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 339 | { |
Greg Kroah-Hartman | cb4a0be | 2023-03-13 19:28:43 +0100 | [diff] [blame] | 340 | int err = -ENODEV; |
Greg Kroah-Hartman | f36be9c | 2023-12-19 14:13:10 +0100 | [diff] [blame] | 341 | const struct bus_type *edac_subsys; |
Greg Kroah-Hartman | cb4a0be | 2023-03-13 19:28:43 +0100 | [diff] [blame] | 342 | struct device *dev_root; |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 343 | |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 344 | edac_dbg(0, "\n"); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 345 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 346 | /* check and count if we have already created the main kobject */ |
| 347 | if (atomic_inc_return(&edac_pci_sysfs_refcount) != 1) |
| 348 | return 0; |
| 349 | |
| 350 | /* First time, so create the main kobject and its |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 351 | * controls and attributes |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 352 | */ |
Kay Sievers | fe5ff8b | 2011-12-14 15:21:07 -0800 | [diff] [blame] | 353 | edac_subsys = edac_get_sysfs_subsys(); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 354 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 355 | /* Bump the reference count on this module to ensure the |
| 356 | * modules isn't unloaded until we deconstruct the top |
| 357 | * level main kobj for EDAC PCI |
| 358 | */ |
| 359 | if (!try_module_get(THIS_MODULE)) { |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 360 | edac_dbg(1, "try_module_get() failed\n"); |
Borislav Petkov | 733476c | 2015-11-27 11:40:43 +0100 | [diff] [blame] | 361 | goto decrement_count_fail; |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 362 | } |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 363 | |
Arthur Jones | 14cc571 | 2008-07-25 01:49:08 -0700 | [diff] [blame] | 364 | edac_pci_top_main_kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL); |
| 365 | if (!edac_pci_top_main_kobj) { |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 366 | edac_dbg(1, "Failed to allocate\n"); |
Arthur Jones | 14cc571 | 2008-07-25 01:49:08 -0700 | [diff] [blame] | 367 | err = -ENOMEM; |
| 368 | goto kzalloc_fail; |
| 369 | } |
| 370 | |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 371 | /* Instanstiate the pci object */ |
Greg Kroah-Hartman | cb4a0be | 2023-03-13 19:28:43 +0100 | [diff] [blame] | 372 | dev_root = bus_get_dev_root(edac_subsys); |
| 373 | if (dev_root) { |
| 374 | err = kobject_init_and_add(edac_pci_top_main_kobj, |
| 375 | &ktype_edac_pci_main_kobj, |
| 376 | &dev_root->kobj, "pci"); |
| 377 | put_device(dev_root); |
| 378 | } |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 379 | if (err) { |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 380 | edac_dbg(1, "Failed to register '.../edac/pci'\n"); |
Greg Kroah-Hartman | b2ed215 | 2007-12-17 15:54:39 -0400 | [diff] [blame] | 381 | goto kobject_init_and_add_fail; |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 382 | } |
| 383 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 384 | /* At this point, to 'release' the top level kobject |
| 385 | * for EDAC PCI, then edac_pci_main_kobj_teardown() |
| 386 | * must be used, for resources to be cleaned up properly |
| 387 | */ |
Arthur Jones | 14cc571 | 2008-07-25 01:49:08 -0700 | [diff] [blame] | 388 | kobject_uevent(edac_pci_top_main_kobj, KOBJ_ADD); |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 389 | edac_dbg(1, "Registered '.../edac/pci' kobject\n"); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 390 | |
| 391 | return 0; |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 392 | |
| 393 | /* Error unwind statck */ |
Greg Kroah-Hartman | b2ed215 | 2007-12-17 15:54:39 -0400 | [diff] [blame] | 394 | kobject_init_and_add_fail: |
Qiushi Wu | 17ed808 | 2020-05-28 15:22:37 -0500 | [diff] [blame] | 395 | kobject_put(edac_pci_top_main_kobj); |
Arthur Jones | 14cc571 | 2008-07-25 01:49:08 -0700 | [diff] [blame] | 396 | |
| 397 | kzalloc_fail: |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 398 | module_put(THIS_MODULE); |
| 399 | |
| 400 | decrement_count_fail: |
| 401 | /* if are on this error exit, nothing to tear down */ |
| 402 | atomic_dec(&edac_pci_sysfs_refcount); |
| 403 | |
| 404 | return err; |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 405 | } |
| 406 | |
| 407 | /* |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 408 | * edac_pci_main_kobj_teardown() |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 409 | * |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 410 | * if no longer linked (needed) remove the top level EDAC PCI |
| 411 | * kobject with its controls and attributes |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 412 | */ |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 413 | static void edac_pci_main_kobj_teardown(void) |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 414 | { |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 415 | edac_dbg(0, "\n"); |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 416 | |
| 417 | /* Decrement the count and only if no more controller instances |
| 418 | * are connected perform the unregisteration of the top level |
| 419 | * main kobj |
| 420 | */ |
| 421 | if (atomic_dec_return(&edac_pci_sysfs_refcount) == 0) { |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 422 | edac_dbg(0, "called kobject_put on main kobj\n"); |
Arthur Jones | 14cc571 | 2008-07-25 01:49:08 -0700 | [diff] [blame] | 423 | kobject_put(edac_pci_top_main_kobj); |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 424 | } |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 425 | } |
| 426 | |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 427 | int edac_pci_create_sysfs(struct edac_pci_ctl_info *pci) |
| 428 | { |
| 429 | int err; |
| 430 | struct kobject *edac_kobj = &pci->kobj; |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 431 | |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 432 | edac_dbg(0, "idx=%d\n", pci->pci_idx); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 433 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 434 | /* create the top main EDAC PCI kobject, IF needed */ |
| 435 | err = edac_pci_main_kobj_setup(); |
| 436 | if (err) |
| 437 | return err; |
| 438 | |
| 439 | /* Create this instance's kobject under the MAIN kobject */ |
| 440 | err = edac_pci_create_instance_kobj(pci, pci->pci_idx); |
| 441 | if (err) |
| 442 | goto unregister_cleanup; |
| 443 | |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 444 | err = sysfs_create_link(edac_kobj, &pci->dev->kobj, EDAC_PCI_SYMLINK); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 445 | if (err) { |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 446 | edac_dbg(0, "sysfs_create_link() returned err= %d\n", err); |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 447 | goto symlink_fail; |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 448 | } |
| 449 | |
| 450 | return 0; |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 451 | |
| 452 | /* Error unwind stack */ |
| 453 | symlink_fail: |
| 454 | edac_pci_unregister_sysfs_instance_kobj(pci); |
| 455 | |
| 456 | unregister_cleanup: |
| 457 | edac_pci_main_kobj_teardown(); |
| 458 | |
| 459 | return err; |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 460 | } |
| 461 | |
| 462 | void edac_pci_remove_sysfs(struct edac_pci_ctl_info *pci) |
| 463 | { |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 464 | edac_dbg(0, "index=%d\n", pci->pci_idx); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 465 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 466 | /* Remove the symlink */ |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 467 | sysfs_remove_link(&pci->kobj, EDAC_PCI_SYMLINK); |
| 468 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 469 | /* remove this PCI instance's sysfs entries */ |
| 470 | edac_pci_unregister_sysfs_instance_kobj(pci); |
| 471 | |
| 472 | /* Call the main unregister function, which will determine |
| 473 | * if this 'pci' is the last instance. |
| 474 | * If it is, the main kobject will be unregistered as a result |
| 475 | */ |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 476 | edac_dbg(0, "calling edac_pci_main_kobj_teardown()\n"); |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 477 | edac_pci_main_kobj_teardown(); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 478 | } |
| 479 | |
| 480 | /************************ PCI error handling *************************/ |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 481 | static u16 get_pci_parity_status(struct pci_dev *dev, int secondary) |
| 482 | { |
| 483 | int where; |
| 484 | u16 status; |
| 485 | |
| 486 | where = secondary ? PCI_SEC_STATUS : PCI_STATUS; |
| 487 | pci_read_config_word(dev, where, &status); |
| 488 | |
| 489 | /* If we get back 0xFFFF then we must suspect that the card has been |
| 490 | * pulled but the Linux PCI layer has not yet finished cleaning up. |
| 491 | * We don't want to report on such devices |
| 492 | */ |
| 493 | |
| 494 | if (status == 0xFFFF) { |
| 495 | u32 sanity; |
| 496 | |
| 497 | pci_read_config_dword(dev, 0, &sanity); |
| 498 | |
| 499 | if (sanity == 0xFFFFFFFF) |
| 500 | return 0; |
| 501 | } |
| 502 | |
| 503 | status &= PCI_STATUS_DETECTED_PARITY | PCI_STATUS_SIG_SYSTEM_ERROR | |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 504 | PCI_STATUS_PARITY; |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 505 | |
| 506 | if (status) |
| 507 | /* reset only the bits we are interested in */ |
| 508 | pci_write_config_word(dev, where, status); |
| 509 | |
| 510 | return status; |
| 511 | } |
| 512 | |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 513 | |
| 514 | /* Clear any PCI parity errors logged by this device. */ |
| 515 | static void edac_pci_dev_parity_clear(struct pci_dev *dev) |
| 516 | { |
| 517 | u8 header_type; |
| 518 | |
| 519 | get_pci_parity_status(dev, 0); |
| 520 | |
| 521 | /* read the device TYPE, looking for bridges */ |
| 522 | pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); |
| 523 | |
Ilpo Järvinen | 5f57b71 | 2023-11-24 11:09:17 +0200 | [diff] [blame] | 524 | if ((header_type & PCI_HEADER_TYPE_MASK) == PCI_HEADER_TYPE_BRIDGE) |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 525 | get_pci_parity_status(dev, 1); |
| 526 | } |
| 527 | |
| 528 | /* |
| 529 | * PCI Parity polling |
| 530 | * |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 531 | * Function to retrieve the current parity status |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 532 | * and decode it |
| 533 | * |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 534 | */ |
| 535 | static void edac_pci_dev_parity_test(struct pci_dev *dev) |
| 536 | { |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 537 | unsigned long flags; |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 538 | u16 status; |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 539 | u8 header_type; |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 540 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 541 | /* stop any interrupts until we can acquire the status */ |
| 542 | local_irq_save(flags); |
| 543 | |
| 544 | /* read the STATUS register on this device */ |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 545 | status = get_pci_parity_status(dev, 0); |
| 546 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 547 | /* read the device TYPE, looking for bridges */ |
| 548 | pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); |
| 549 | |
| 550 | local_irq_restore(flags); |
| 551 | |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 552 | edac_dbg(4, "PCI STATUS= 0x%04x %s\n", status, dev_name(&dev->dev)); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 553 | |
Bryan Boatright | 6b09ff9 | 2008-02-07 00:14:58 -0800 | [diff] [blame] | 554 | /* check the status reg for errors on boards NOT marked as broken |
| 555 | * if broken, we cannot trust any of the status bits |
| 556 | */ |
| 557 | if (status && !dev->broken_parity_status) { |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 558 | if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) { |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 559 | edac_printk(KERN_CRIT, EDAC_PCI, |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 560 | "Signaled System Error on %s\n", |
| 561 | pci_name(dev)); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 562 | atomic_inc(&pci_nonparity_count); |
| 563 | } |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 564 | |
| 565 | if (status & (PCI_STATUS_PARITY)) { |
| 566 | edac_printk(KERN_CRIT, EDAC_PCI, |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 567 | "Master Data Parity Error on %s\n", |
| 568 | pci_name(dev)); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 569 | |
| 570 | atomic_inc(&pci_parity_count); |
| 571 | } |
| 572 | |
| 573 | if (status & (PCI_STATUS_DETECTED_PARITY)) { |
| 574 | edac_printk(KERN_CRIT, EDAC_PCI, |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 575 | "Detected Parity Error on %s\n", |
| 576 | pci_name(dev)); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 577 | |
| 578 | atomic_inc(&pci_parity_count); |
| 579 | } |
| 580 | } |
| 581 | |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 582 | |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 583 | edac_dbg(4, "PCI HEADER TYPE= 0x%02x %s\n", |
| 584 | header_type, dev_name(&dev->dev)); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 585 | |
Ilpo Järvinen | 5f57b71 | 2023-11-24 11:09:17 +0200 | [diff] [blame] | 586 | if ((header_type & PCI_HEADER_TYPE_MASK) == PCI_HEADER_TYPE_BRIDGE) { |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 587 | /* On bridges, need to examine secondary status register */ |
| 588 | status = get_pci_parity_status(dev, 1); |
| 589 | |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 590 | edac_dbg(4, "PCI SEC_STATUS= 0x%04x %s\n", |
| 591 | status, dev_name(&dev->dev)); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 592 | |
Bryan Boatright | 6b09ff9 | 2008-02-07 00:14:58 -0800 | [diff] [blame] | 593 | /* check the secondary status reg for errors, |
| 594 | * on NOT broken boards |
| 595 | */ |
| 596 | if (status && !dev->broken_parity_status) { |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 597 | if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) { |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 598 | edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 599 | "Signaled System Error on %s\n", |
| 600 | pci_name(dev)); |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 601 | atomic_inc(&pci_nonparity_count); |
| 602 | } |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 603 | |
| 604 | if (status & (PCI_STATUS_PARITY)) { |
| 605 | edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 606 | "Master Data Parity Error on " |
| 607 | "%s\n", pci_name(dev)); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 608 | |
| 609 | atomic_inc(&pci_parity_count); |
| 610 | } |
| 611 | |
| 612 | if (status & (PCI_STATUS_DETECTED_PARITY)) { |
| 613 | edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " |
Douglas Thompson | 052dfb4 | 2007-07-19 01:50:13 -0700 | [diff] [blame] | 614 | "Detected Parity Error on %s\n", |
| 615 | pci_name(dev)); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 616 | |
| 617 | atomic_inc(&pci_parity_count); |
| 618 | } |
| 619 | } |
| 620 | } |
| 621 | } |
| 622 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 623 | /* reduce some complexity in definition of the iterator */ |
| 624 | typedef void (*pci_parity_check_fn_t) (struct pci_dev *dev); |
| 625 | |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 626 | /* |
| 627 | * pci_dev parity list iterator |
Wei Yongjun | 3bfe5aa | 2012-12-04 00:01:42 -0500 | [diff] [blame] | 628 | * |
| 629 | * Scan the PCI device list looking for SERRORs, Master Parity ERRORS or |
| 630 | * Parity ERRORs on primary or secondary devices. |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 631 | */ |
| 632 | static inline void edac_pci_dev_parity_iterator(pci_parity_check_fn_t fn) |
| 633 | { |
| 634 | struct pci_dev *dev = NULL; |
| 635 | |
Wei Yongjun | 3bfe5aa | 2012-12-04 00:01:42 -0500 | [diff] [blame] | 636 | for_each_pci_dev(dev) |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 637 | fn(dev); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 638 | } |
| 639 | |
| 640 | /* |
| 641 | * edac_pci_do_parity_check |
| 642 | * |
| 643 | * performs the actual PCI parity check operation |
| 644 | */ |
| 645 | void edac_pci_do_parity_check(void) |
| 646 | { |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 647 | int before_count; |
| 648 | |
Joe Perches | 956b9ba1 | 2012-04-29 17:08:39 -0300 | [diff] [blame] | 649 | edac_dbg(3, "\n"); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 650 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 651 | /* if policy has PCI check off, leave now */ |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 652 | if (!check_pci_errors) |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 653 | return; |
| 654 | |
| 655 | before_count = atomic_read(&pci_parity_count); |
| 656 | |
| 657 | /* scan all PCI devices looking for a Parity Error on devices and |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 658 | * bridges. |
| 659 | * The iterator calls pci_get_device() which might sleep, thus |
| 660 | * we cannot disable interrupts in this scan. |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 661 | */ |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 662 | edac_pci_dev_parity_iterator(edac_pci_dev_parity_test); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 663 | |
| 664 | /* Only if operator has selected panic on PCI Error */ |
Dave Jiang | 4de78c6 | 2007-07-19 01:49:54 -0700 | [diff] [blame] | 665 | if (edac_pci_get_panic_on_pe()) { |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 666 | /* If the count is different 'after' from 'before' */ |
| 667 | if (before_count != atomic_read(&pci_parity_count)) |
| 668 | panic("EDAC: PCI Parity Error"); |
| 669 | } |
| 670 | } |
| 671 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 672 | /* |
| 673 | * edac_pci_clear_parity_errors |
| 674 | * |
| 675 | * function to perform an iteration over the PCI devices |
| 676 | * and clearn their current status |
| 677 | */ |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 678 | void edac_pci_clear_parity_errors(void) |
| 679 | { |
| 680 | /* Clear any PCI bus parity errors that devices initially have logged |
| 681 | * in their registers. |
| 682 | */ |
| 683 | edac_pci_dev_parity_iterator(edac_pci_dev_parity_clear); |
| 684 | } |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 685 | |
| 686 | /* |
| 687 | * edac_pci_handle_pe |
| 688 | * |
| 689 | * Called to handle a PARITY ERROR event |
| 690 | */ |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 691 | void edac_pci_handle_pe(struct edac_pci_ctl_info *pci, const char *msg) |
| 692 | { |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 693 | |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 694 | /* global PE counter incremented by edac_pci_do_parity_check() */ |
| 695 | atomic_inc(&pci->counters.pe_count); |
| 696 | |
Dave Jiang | 4de78c6 | 2007-07-19 01:49:54 -0700 | [diff] [blame] | 697 | if (edac_pci_get_log_pe()) |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 698 | edac_pci_printk(pci, KERN_WARNING, |
| 699 | "Parity Error ctl: %s %d: %s\n", |
| 700 | pci->ctl_name, pci->pci_idx, msg); |
| 701 | |
| 702 | /* |
| 703 | * poke all PCI devices and see which one is the troublemaker |
| 704 | * panic() is called if set |
| 705 | */ |
| 706 | edac_pci_do_parity_check(); |
| 707 | } |
| 708 | EXPORT_SYMBOL_GPL(edac_pci_handle_pe); |
| 709 | |
Doug Thompson | d4c1465 | 2007-07-26 10:41:15 -0700 | [diff] [blame] | 710 | |
| 711 | /* |
| 712 | * edac_pci_handle_npe |
| 713 | * |
| 714 | * Called to handle a NON-PARITY ERROR event |
| 715 | */ |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 716 | void edac_pci_handle_npe(struct edac_pci_ctl_info *pci, const char *msg) |
| 717 | { |
| 718 | |
| 719 | /* global NPE counter incremented by edac_pci_do_parity_check() */ |
| 720 | atomic_inc(&pci->counters.npe_count); |
| 721 | |
Dave Jiang | 4de78c6 | 2007-07-19 01:49:54 -0700 | [diff] [blame] | 722 | if (edac_pci_get_log_npe()) |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 723 | edac_pci_printk(pci, KERN_WARNING, |
| 724 | "Non-Parity Error ctl: %s %d: %s\n", |
| 725 | pci->ctl_name, pci->pci_idx, msg); |
| 726 | |
| 727 | /* |
| 728 | * poke all PCI devices and see which one is the troublemaker |
| 729 | * panic() is called if set |
| 730 | */ |
| 731 | edac_pci_do_parity_check(); |
| 732 | } |
| 733 | EXPORT_SYMBOL_GPL(edac_pci_handle_npe); |
Douglas Thompson | 7c9281d | 2007-07-19 01:49:33 -0700 | [diff] [blame] | 734 | |
| 735 | /* |
| 736 | * Define the PCI parameter to the module |
| 737 | */ |
Dave Jiang | 91b9904 | 2007-07-19 01:49:52 -0700 | [diff] [blame] | 738 | module_param(check_pci_errors, int, 0644); |
Dave Jiang | 4de78c6 | 2007-07-19 01:49:54 -0700 | [diff] [blame] | 739 | MODULE_PARM_DESC(check_pci_errors, |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 740 | "Check for PCI bus parity errors: 0=off 1=on"); |
Dave Jiang | 4de78c6 | 2007-07-19 01:49:54 -0700 | [diff] [blame] | 741 | module_param(edac_pci_panic_on_pe, int, 0644); |
| 742 | MODULE_PARM_DESC(edac_pci_panic_on_pe, |
Douglas Thompson | 079708b | 2007-07-19 01:49:58 -0700 | [diff] [blame] | 743 | "Panic on PCI Bus Parity error: 0=off 1=on"); |