drivers/edac/octeon_edac-lmc.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2009 Wind River Systems,
   7  *   written by Ralf Baechle <ralf@linux-mips.org>
   8  *
   9  * Copyright (c) 2013 by Cisco Systems, Inc.
  10  * All rights reserved.
  11  */
  12 #include <linux/module.h>
  13 #include <linux/init.h>
  14 #include <linux/slab.h>
  15 #include <linux/io.h>
  16 #include <linux/edac.h>
  17 #include <linux/ctype.h>
  18
  19 #include <asm/octeon/octeon.h>
  20 #include <asm/octeon/cvmx-lmcx-defs.h>
  21
  22 #include "edac_module.h"
  23
  24 #define OCTEON_MAX_MC 4
  25
  26 #define to_mci(k) container_of(k, struct mem_ctl_info, dev)
  27
  28 struct octeon_lmc_pvt {
  29         unsigned long inject;
  30         unsigned long error_type;
  31         unsigned long dimm;
  32         unsigned long rank;
  33         unsigned long bank;
  34         unsigned long row;
  35         unsigned long col;
  36 };
  37
  38 static void octeon_lmc_edac_poll(struct mem_ctl_info *mci)
  39 {
  40         union cvmx_lmcx_mem_cfg0 cfg0;
  41         bool do_clear = false;
  42         char msg[64];
  43
  44         cfg0.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(mci->mc_idx));
  45         if (cfg0.s.sec_err || cfg0.s.ded_err) {
  46                 union cvmx_lmcx_fadr fadr;
  47                 fadr.u64 = cvmx_read_csr(CVMX_LMCX_FADR(mci->mc_idx));
  48                 snprintf(msg, sizeof(msg),
  49                          "DIMM %d rank %d bank %d row %d col %d",
  50                          fadr.cn30xx.fdimm, fadr.cn30xx.fbunk,
  51                          fadr.cn30xx.fbank, fadr.cn30xx.frow, fadr.cn30xx.fcol);
  52         }
  53
  54         if (cfg0.s.sec_err) {
  55                 edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, 0, 0, 0,
  56                                      -1, -1, -1, msg, "");
  57                 cfg0.s.sec_err = -1;    /* Done, re-arm */
  58                 do_clear = true;
  59         }
  60
  61         if (cfg0.s.ded_err) {
  62                 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 0, 0, 0,
  63                                      -1, -1, -1, msg, "");
  64                 cfg0.s.ded_err = -1;    /* Done, re-arm */
  65                 do_clear = true;
  66         }
  67         if (do_clear)
  68                 cvmx_write_csr(CVMX_LMCX_MEM_CFG0(mci->mc_idx), cfg0.u64);
  69 }
  70
  71 static void octeon_lmc_edac_poll_o2(struct mem_ctl_info *mci)
  72 {
  73         struct octeon_lmc_pvt *pvt = mci->pvt_info;
  74         union cvmx_lmcx_int int_reg;
  75         bool do_clear = false;
  76         char msg[64];
  77
  78         if (!pvt->inject)
  79                 int_reg.u64 = cvmx_read_csr(CVMX_LMCX_INT(mci->mc_idx));
  80         else {
  81                 int_reg.u64 = 0;
  82                 if (pvt->error_type == 1)
  83                         int_reg.s.sec_err = 1;
  84                 if (pvt->error_type == 2)
  85                         int_reg.s.ded_err = 1;
  86         }
  87
  88         if (int_reg.s.sec_err || int_reg.s.ded_err) {
  89                 union cvmx_lmcx_fadr fadr;
  90                 if (likely(!pvt->inject))
  91                         fadr.u64 = cvmx_read_csr(CVMX_LMCX_FADR(mci->mc_idx));
  92                 else {
  93                         fadr.cn61xx.fdimm = pvt->dimm;
  94                         fadr.cn61xx.fbunk = pvt->rank;
  95                         fadr.cn61xx.fbank = pvt->bank;
  96                         fadr.cn61xx.frow = pvt->row;
  97                         fadr.cn61xx.fcol = pvt->col;
  98                 }
  99                 snprintf(msg, sizeof(msg),
 100                          "DIMM %d rank %d bank %d row %d col %d",
 101                          fadr.cn61xx.fdimm, fadr.cn61xx.fbunk,
 102                          fadr.cn61xx.fbank, fadr.cn61xx.frow, fadr.cn61xx.fcol);
 103         }
 104
 105         if (int_reg.s.sec_err) {
 106                 edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, 0, 0, 0,
 107                                      -1, -1, -1, msg, "");
 108                 int_reg.s.sec_err = -1; /* Done, re-arm */
 109                 do_clear = true;
 110         }
 111
 112         if (int_reg.s.ded_err) {
 113                 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 0, 0, 0,
 114                                      -1, -1, -1, msg, "");
 115                 int_reg.s.ded_err = -1; /* Done, re-arm */
 116                 do_clear = true;
 117         }
 118
 119         if (do_clear) {
 120                 if (likely(!pvt->inject))
 121                         cvmx_write_csr(CVMX_LMCX_INT(mci->mc_idx), int_reg.u64);
 122                 else
 123                         pvt->inject = 0;
 124         }
 125 }
 126
 127 /************************ MC SYSFS parts ***********************************/
 128
 129 /* Only a couple naming differences per template, so very similar */
 130 #define TEMPLATE_SHOW(reg)                                              \
 131 static ssize_t octeon_mc_inject_##reg##_show(struct device *dev,        \
 132                                struct device_attribute *attr,           \
 133                                char *data)                              \
 134 {                                                                       \
 135         struct mem_ctl_info *mci = to_mci(dev);                         \
 136         struct octeon_lmc_pvt *pvt = mci->pvt_info;                     \
 137         return sprintf(data, "%016llu\n", (u64)pvt->reg);               \
 138 }
 139
 140 #define TEMPLATE_STORE(reg)                                             \
 141 static ssize_t octeon_mc_inject_##reg##_store(struct device *dev,       \
 142                                struct device_attribute *attr,           \
 143                                const char *data, size_t count)          \
 144 {                                                                       \
 145         struct mem_ctl_info *mci = to_mci(dev);                         \
 146         struct octeon_lmc_pvt *pvt = mci->pvt_info;                     \
 147         if (isdigit(*data)) {                                           \
 148                 if (!kstrtoul(data, 0, &pvt->reg))                      \
 149                         return count;                                   \
 150         }                                                               \
 151         return 0;                                                       \
 152 }
 153
 154 TEMPLATE_SHOW(inject);
 155 TEMPLATE_STORE(inject);
 156 TEMPLATE_SHOW(dimm);
 157 TEMPLATE_STORE(dimm);
 158 TEMPLATE_SHOW(bank);
 159 TEMPLATE_STORE(bank);
 160 TEMPLATE_SHOW(rank);
 161 TEMPLATE_STORE(rank);
 162 TEMPLATE_SHOW(row);
 163 TEMPLATE_STORE(row);
 164 TEMPLATE_SHOW(col);
 165 TEMPLATE_STORE(col);
 166
 167 static ssize_t octeon_mc_inject_error_type_store(struct device *dev,
 168                                           struct device_attribute *attr,
 169                                           const char *data,
 170                                           size_t count)
 171 {
 172         struct mem_ctl_info *mci = to_mci(dev);
 173         struct octeon_lmc_pvt *pvt = mci->pvt_info;
 174
 175         if (!strncmp(data, "single", 6))
 176                 pvt->error_type = 1;
 177         else if (!strncmp(data, "double", 6))
 178                 pvt->error_type = 2;
 179
 180         return count;
 181 }
 182
 183 static ssize_t octeon_mc_inject_error_type_show(struct device *dev,
 184                                          struct device_attribute *attr,
 185                                          char *data)
 186 {
 187         struct mem_ctl_info *mci = to_mci(dev);
 188         struct octeon_lmc_pvt *pvt = mci->pvt_info;
 189         if (pvt->error_type == 1)
 190                 return sprintf(data, "single");
 191         else if (pvt->error_type == 2)
 192                 return sprintf(data, "double");
 193
 194         return 0;
 195 }
 196
 197 static DEVICE_ATTR(inject, S_IRUGO | S_IWUSR,
 198                    octeon_mc_inject_inject_show, octeon_mc_inject_inject_store);
 199 static DEVICE_ATTR(error_type, S_IRUGO | S_IWUSR,
 200                    octeon_mc_inject_error_type_show, octeon_mc_inject_error_type_store);
 201 static DEVICE_ATTR(dimm, S_IRUGO | S_IWUSR,
 202                    octeon_mc_inject_dimm_show, octeon_mc_inject_dimm_store);
 203 static DEVICE_ATTR(rank, S_IRUGO | S_IWUSR,
 204                    octeon_mc_inject_rank_show, octeon_mc_inject_rank_store);
 205 static DEVICE_ATTR(bank, S_IRUGO | S_IWUSR,
 206                    octeon_mc_inject_bank_show, octeon_mc_inject_bank_store);
 207 static DEVICE_ATTR(row, S_IRUGO | S_IWUSR,
 208                    octeon_mc_inject_row_show, octeon_mc_inject_row_store);
 209 static DEVICE_ATTR(col, S_IRUGO | S_IWUSR,
 210                    octeon_mc_inject_col_show, octeon_mc_inject_col_store);
 211
 212 static struct attribute *octeon_dev_attrs[] = {
 213         &dev_attr_inject.attr,
 214         &dev_attr_error_type.attr,
 215         &dev_attr_dimm.attr,
 216         &dev_attr_rank.attr,
 217         &dev_attr_bank.attr,
 218         &dev_attr_row.attr,
 219         &dev_attr_col.attr,
 220         NULL
 221 };
 222
 223 ATTRIBUTE_GROUPS(octeon_dev);
 224
 225 static int octeon_lmc_edac_probe(struct platform_device *pdev)
 226 {
 227         struct mem_ctl_info *mci;
 228         struct edac_mc_layer layers[1];
 229         int mc = pdev->id;
 230
 231         opstate_init();
 232
 233         layers[0].type = EDAC_MC_LAYER_CHANNEL;
 234         layers[0].size = 1;
 235         layers[0].is_virt_csrow = false;
 236
 237         if (OCTEON_IS_OCTEON1PLUS()) {
 238                 union cvmx_lmcx_mem_cfg0 cfg0;
 239
 240                 cfg0.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(0));
 241                 if (!cfg0.s.ecc_ena) {
 242                         dev_info(&pdev->dev, "Disabled (ECC not enabled)\n");
 243                         return 0;
 244                 }
 245
 246                 mci = edac_mc_alloc(mc, ARRAY_SIZE(layers), layers, sizeof(struct octeon_lmc_pvt));
 247                 if (!mci)
 248                         return -ENXIO;
 249
 250                 mci->pdev = &pdev->dev;
 251                 mci->dev_name = dev_name(&pdev->dev);
 252
 253                 mci->mod_name = "octeon-lmc";
 254                 mci->ctl_name = "octeon-lmc-err";
 255                 mci->edac_check = octeon_lmc_edac_poll;
 256
 257                 if (edac_mc_add_mc_with_groups(mci, octeon_dev_groups)) {
 258                         dev_err(&pdev->dev, "edac_mc_add_mc() failed\n");
 259                         edac_mc_free(mci);
 260                         return -ENXIO;
 261                 }
 262
 263                 cfg0.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(mc));
 264                 cfg0.s.intr_ded_ena = 0;        /* We poll */
 265                 cfg0.s.intr_sec_ena = 0;
 266                 cvmx_write_csr(CVMX_LMCX_MEM_CFG0(mc), cfg0.u64);
 267         } else {
 268                 /* OCTEON II */
 269                 union cvmx_lmcx_int_en en;
 270                 union cvmx_lmcx_config config;
 271
 272                 config.u64 = cvmx_read_csr(CVMX_LMCX_CONFIG(0));
 273                 if (!config.s.ecc_ena) {
 274                         dev_info(&pdev->dev, "Disabled (ECC not enabled)\n");
 275                         return 0;
 276                 }
 277
 278                 mci = edac_mc_alloc(mc, ARRAY_SIZE(layers), layers, sizeof(struct octeon_lmc_pvt));
 279                 if (!mci)
 280                         return -ENXIO;
 281
 282                 mci->pdev = &pdev->dev;
 283                 mci->dev_name = dev_name(&pdev->dev);
 284
 285                 mci->mod_name = "octeon-lmc";
 286                 mci->ctl_name = "co_lmc_err";
 287                 mci->edac_check = octeon_lmc_edac_poll_o2;
 288
 289                 if (edac_mc_add_mc_with_groups(mci, octeon_dev_groups)) {
 290                         dev_err(&pdev->dev, "edac_mc_add_mc() failed\n");
 291                         edac_mc_free(mci);
 292                         return -ENXIO;
 293                 }
 294
 295                 en.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(mc));
 296                 en.s.intr_ded_ena = 0;  /* We poll */
 297                 en.s.intr_sec_ena = 0;
 298                 cvmx_write_csr(CVMX_LMCX_MEM_CFG0(mc), en.u64);
 299         }
 300         platform_set_drvdata(pdev, mci);
 301
 302         return 0;
 303 }
 304
 305 static int octeon_lmc_edac_remove(struct platform_device *pdev)
 306 {
 307         struct mem_ctl_info *mci = platform_get_drvdata(pdev);
 308
 309         edac_mc_del_mc(&pdev->dev);
 310         edac_mc_free(mci);
 311         return 0;
 312 }
 313
 314 static struct platform_driver octeon_lmc_edac_driver = {
 315         .probe = octeon_lmc_edac_probe,
 316         .remove = octeon_lmc_edac_remove,
 317         .driver = {
 318                    .name = "octeon_lmc_edac",
 319         }
 320 };
 321 module_platform_driver(octeon_lmc_edac_driver);
 322
 323 MODULE_LICENSE("GPL");
 324 MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");