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 #include <linux/module.h>
  10 #include <linux/init.h>
  11 #include <linux/slab.h>
  12 #include <linux/io.h>
  13 #include <linux/edac.h>
  14
  15 #include <asm/octeon/octeon.h>
  16 #include <asm/octeon/cvmx-lmcx-defs.h>
  17
  18 #include "edac_core.h"
  19 #include "edac_module.h"
  20
  21 #define OCTEON_MAX_MC 4
  22
  23 static void octeon_lmc_edac_poll(struct mem_ctl_info *mci)
  24 {
  25         union cvmx_lmcx_mem_cfg0 cfg0;
  26         bool do_clear = false;
  27         char msg[64];
  28
  29         cfg0.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(mci->mc_idx));
  30         if (cfg0.s.sec_err || cfg0.s.ded_err) {
  31                 union cvmx_lmcx_fadr fadr;
  32                 fadr.u64 = cvmx_read_csr(CVMX_LMCX_FADR(mci->mc_idx));
  33                 snprintf(msg, sizeof(msg),
  34                          "DIMM %d rank %d bank %d row %d col %d",
  35                          fadr.cn30xx.fdimm, fadr.cn30xx.fbunk,
  36                          fadr.cn30xx.fbank, fadr.cn30xx.frow, fadr.cn30xx.fcol);
  37         }
  38
  39         if (cfg0.s.sec_err) {
  40                 edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, 0, 0, 0,
  41                                      -1, -1, -1, msg, "");
  42                 cfg0.s.sec_err = -1;    /* Done, re-arm */
  43                 do_clear = true;
  44         }
  45
  46         if (cfg0.s.ded_err) {
  47                 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 0, 0, 0,
  48                                      -1, -1, -1, msg, "");
  49                 cfg0.s.ded_err = -1;    /* Done, re-arm */
  50                 do_clear = true;
  51         }
  52         if (do_clear)
  53                 cvmx_write_csr(CVMX_LMCX_MEM_CFG0(mci->mc_idx), cfg0.u64);
  54 }
  55
  56 static void octeon_lmc_edac_poll_o2(struct mem_ctl_info *mci)
  57 {
  58         union cvmx_lmcx_int int_reg;
  59         bool do_clear = false;
  60         char msg[64];
  61
  62         int_reg.u64 = cvmx_read_csr(CVMX_LMCX_INT(mci->mc_idx));
  63         if (int_reg.s.sec_err || int_reg.s.ded_err) {
  64                 union cvmx_lmcx_fadr fadr;
  65                 fadr.u64 = cvmx_read_csr(CVMX_LMCX_FADR(mci->mc_idx));
  66                 snprintf(msg, sizeof(msg),
  67                          "DIMM %d rank %d bank %d row %d col %d",
  68                          fadr.cn61xx.fdimm, fadr.cn61xx.fbunk,
  69                          fadr.cn61xx.fbank, fadr.cn61xx.frow, fadr.cn61xx.fcol);
  70         }
  71
  72         if (int_reg.s.sec_err) {
  73                 edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, 0, 0, 0,
  74                                      -1, -1, -1, msg, "");
  75                 int_reg.s.sec_err = -1; /* Done, re-arm */
  76                 do_clear = true;
  77         }
  78
  79         if (int_reg.s.ded_err) {
  80                 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 0, 0, 0,
  81                                      -1, -1, -1, msg, "");
  82                 int_reg.s.ded_err = -1; /* Done, re-arm */
  83                 do_clear = true;
  84         }
  85         if (do_clear)
  86                 cvmx_write_csr(CVMX_LMCX_INT(mci->mc_idx), int_reg.u64);
  87 }
  88
  89 static int octeon_lmc_edac_probe(struct platform_device *pdev)
  90 {
  91         struct mem_ctl_info *mci;
  92         struct edac_mc_layer layers[1];
  93         int mc = pdev->id;
  94
  95         layers[0].type = EDAC_MC_LAYER_CHANNEL;
  96         layers[0].size = 1;
  97         layers[0].is_virt_csrow = false;
  98
  99         if (OCTEON_IS_MODEL(OCTEON_FAM_1_PLUS)) {
 100                 union cvmx_lmcx_mem_cfg0 cfg0;
 101
 102                 cfg0.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(0));
 103                 if (!cfg0.s.ecc_ena) {
 104                         dev_info(&pdev->dev, "Disabled (ECC not enabled)\n");
 105                         return 0;
 106                 }
 107
 108                 mci = edac_mc_alloc(mc, ARRAY_SIZE(layers), layers, 0);
 109                 if (!mci)
 110                         return -ENXIO;
 111
 112                 mci->pdev = &pdev->dev;
 113                 mci->dev_name = dev_name(&pdev->dev);
 114
 115                 mci->mod_name = "octeon-lmc";
 116                 mci->ctl_name = "octeon-lmc-err";
 117                 mci->edac_check = octeon_lmc_edac_poll;
 118
 119                 if (edac_mc_add_mc(mci)) {
 120                         dev_err(&pdev->dev, "edac_mc_add_mc() failed\n");
 121                         edac_mc_free(mci);
 122                         return -ENXIO;
 123                 }
 124
 125                 cfg0.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(mc));
 126                 cfg0.s.intr_ded_ena = 0;        /* We poll */
 127                 cfg0.s.intr_sec_ena = 0;
 128                 cvmx_write_csr(CVMX_LMCX_MEM_CFG0(mc), cfg0.u64);
 129         } else {
 130                 /* OCTEON II */
 131                 union cvmx_lmcx_int_en en;
 132                 union cvmx_lmcx_config config;
 133
 134                 config.u64 = cvmx_read_csr(CVMX_LMCX_CONFIG(0));
 135                 if (!config.s.ecc_ena) {
 136                         dev_info(&pdev->dev, "Disabled (ECC not enabled)\n");
 137                         return 0;
 138                 }
 139
 140                 mci = edac_mc_alloc(mc, ARRAY_SIZE(layers), layers, 0);
 141                 if (!mci)
 142                         return -ENXIO;
 143
 144                 mci->pdev = &pdev->dev;
 145                 mci->dev_name = dev_name(&pdev->dev);
 146
 147                 mci->mod_name = "octeon-lmc";
 148                 mci->ctl_name = "co_lmc_err";
 149                 mci->edac_check = octeon_lmc_edac_poll_o2;
 150
 151                 if (edac_mc_add_mc(mci)) {
 152                         dev_err(&pdev->dev, "edac_mc_add_mc() failed\n");
 153                         edac_mc_free(mci);
 154                         return -ENXIO;
 155                 }
 156
 157                 en.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(mc));
 158                 en.s.intr_ded_ena = 0;  /* We poll */
 159                 en.s.intr_sec_ena = 0;
 160                 cvmx_write_csr(CVMX_LMCX_MEM_CFG0(mc), en.u64);
 161         }
 162         platform_set_drvdata(pdev, mci);
 163
 164         return 0;
 165 }
 166
 167 static int octeon_lmc_edac_remove(struct platform_device *pdev)
 168 {
 169         struct mem_ctl_info *mci = platform_get_drvdata(pdev);
 170
 171         edac_mc_del_mc(&pdev->dev);
 172         edac_mc_free(mci);
 173         return 0;
 174 }
 175
 176 static struct platform_driver octeon_lmc_edac_driver = {
 177         .probe = octeon_lmc_edac_probe,
 178         .remove = octeon_lmc_edac_remove,
 179         .driver = {
 180                    .name = "octeon_lmc_edac",
 181         }
 182 };
 183 module_platform_driver(octeon_lmc_edac_driver);
 184
 185 MODULE_LICENSE("GPL");
 186 MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");