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