drivers/edac/octeon_edac-l2c.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) 2012 Cavium, Inc.
   7  *
   8  * Copyright (C) 2009 Wind River Systems,
   9  *   written by Ralf Baechle <ralf@linux-mips.org>
  10  */
  11 #include <linux/module.h>
  12 #include <linux/init.h>
  13 #include <linux/slab.h>
  14 #include <linux/io.h>
  15 #include <linux/edac.h>
  16
  17 #include <asm/octeon/cvmx.h>
  18
  19 #include "edac_module.h"
  20
  21 #define EDAC_MOD_STR "octeon-l2c"
  22
  23 static void octeon_l2c_poll_oct1(struct edac_device_ctl_info *l2c)
  24 {
  25         union cvmx_l2t_err l2t_err, l2t_err_reset;
  26         union cvmx_l2d_err l2d_err, l2d_err_reset;
  27
  28         l2t_err_reset.u64 = 0;
  29         l2t_err.u64 = cvmx_read_csr(CVMX_L2T_ERR);
  30         if (l2t_err.s.sec_err) {
  31                 edac_device_handle_ce(l2c, 0, 0,
  32                                       "Tag Single bit error (corrected)");
  33                 l2t_err_reset.s.sec_err = 1;
  34         }
  35         if (l2t_err.s.ded_err) {
  36                 edac_device_handle_ue(l2c, 0, 0,
  37                                       "Tag Double bit error (detected)");
  38                 l2t_err_reset.s.ded_err = 1;
  39         }
  40         if (l2t_err_reset.u64)
  41                 cvmx_write_csr(CVMX_L2T_ERR, l2t_err_reset.u64);
  42
  43         l2d_err_reset.u64 = 0;
  44         l2d_err.u64 = cvmx_read_csr(CVMX_L2D_ERR);
  45         if (l2d_err.s.sec_err) {
  46                 edac_device_handle_ce(l2c, 0, 1,
  47                                       "Data Single bit error (corrected)");
  48                 l2d_err_reset.s.sec_err = 1;
  49         }
  50         if (l2d_err.s.ded_err) {
  51                 edac_device_handle_ue(l2c, 0, 1,
  52                                       "Data Double bit error (detected)");
  53                 l2d_err_reset.s.ded_err = 1;
  54         }
  55         if (l2d_err_reset.u64)
  56                 cvmx_write_csr(CVMX_L2D_ERR, l2d_err_reset.u64);
  57
  58 }
  59
  60 static void _octeon_l2c_poll_oct2(struct edac_device_ctl_info *l2c, int tad)
  61 {
  62         union cvmx_l2c_err_tdtx err_tdtx, err_tdtx_reset;
  63         union cvmx_l2c_err_ttgx err_ttgx, err_ttgx_reset;
  64         char buf1[64];
  65         char buf2[80];
  66
  67         err_tdtx_reset.u64 = 0;
  68         err_tdtx.u64 = cvmx_read_csr(CVMX_L2C_ERR_TDTX(tad));
  69         if (err_tdtx.s.dbe || err_tdtx.s.sbe ||
  70             err_tdtx.s.vdbe || err_tdtx.s.vsbe)
  71                 snprintf(buf1, sizeof(buf1),
  72                          "type:%d, syn:0x%x, way:%d",
  73                          err_tdtx.s.type, err_tdtx.s.syn, err_tdtx.s.wayidx);
  74
  75         if (err_tdtx.s.dbe) {
  76                 snprintf(buf2, sizeof(buf2),
  77                          "L2D Double bit error (detected):%s", buf1);
  78                 err_tdtx_reset.s.dbe = 1;
  79                 edac_device_handle_ue(l2c, tad, 1, buf2);
  80         }
  81         if (err_tdtx.s.sbe) {
  82                 snprintf(buf2, sizeof(buf2),
  83                          "L2D Single bit error (corrected):%s", buf1);
  84                 err_tdtx_reset.s.sbe = 1;
  85                 edac_device_handle_ce(l2c, tad, 1, buf2);
  86         }
  87         if (err_tdtx.s.vdbe) {
  88                 snprintf(buf2, sizeof(buf2),
  89                          "VBF Double bit error (detected):%s", buf1);
  90                 err_tdtx_reset.s.vdbe = 1;
  91                 edac_device_handle_ue(l2c, tad, 1, buf2);
  92         }
  93         if (err_tdtx.s.vsbe) {
  94                 snprintf(buf2, sizeof(buf2),
  95                          "VBF Single bit error (corrected):%s", buf1);
  96                 err_tdtx_reset.s.vsbe = 1;
  97                 edac_device_handle_ce(l2c, tad, 1, buf2);
  98         }
  99         if (err_tdtx_reset.u64)
 100                 cvmx_write_csr(CVMX_L2C_ERR_TDTX(tad), err_tdtx_reset.u64);
 101
 102         err_ttgx_reset.u64 = 0;
 103         err_ttgx.u64 = cvmx_read_csr(CVMX_L2C_ERR_TTGX(tad));
 104
 105         if (err_ttgx.s.dbe || err_ttgx.s.sbe)
 106                 snprintf(buf1, sizeof(buf1),
 107                          "type:%d, syn:0x%x, way:%d",
 108                          err_ttgx.s.type, err_ttgx.s.syn, err_ttgx.s.wayidx);
 109
 110         if (err_ttgx.s.dbe) {
 111                 snprintf(buf2, sizeof(buf2),
 112                          "Tag Double bit error (detected):%s", buf1);
 113                 err_ttgx_reset.s.dbe = 1;
 114                 edac_device_handle_ue(l2c, tad, 0, buf2);
 115         }
 116         if (err_ttgx.s.sbe) {
 117                 snprintf(buf2, sizeof(buf2),
 118                          "Tag Single bit error (corrected):%s", buf1);
 119                 err_ttgx_reset.s.sbe = 1;
 120                 edac_device_handle_ce(l2c, tad, 0, buf2);
 121         }
 122         if (err_ttgx_reset.u64)
 123                 cvmx_write_csr(CVMX_L2C_ERR_TTGX(tad), err_ttgx_reset.u64);
 124 }
 125
 126 static void octeon_l2c_poll_oct2(struct edac_device_ctl_info *l2c)
 127 {
 128         int i;
 129         for (i = 0; i < l2c->nr_instances; i++)
 130                 _octeon_l2c_poll_oct2(l2c, i);
 131 }
 132
 133 static int octeon_l2c_probe(struct platform_device *pdev)
 134 {
 135         struct edac_device_ctl_info *l2c;
 136
 137         int num_tads = OCTEON_IS_MODEL(OCTEON_CN68XX) ? 4 : 1;
 138
 139         /* 'Tags' are block 0, 'Data' is block 1*/
 140         l2c = edac_device_alloc_ctl_info(0, "l2c", num_tads, "l2c", 2, 0,
 141                                          NULL, 0, edac_device_alloc_index());
 142         if (!l2c)
 143                 return -ENOMEM;
 144
 145         l2c->dev = &pdev->dev;
 146         platform_set_drvdata(pdev, l2c);
 147         l2c->dev_name = dev_name(&pdev->dev);
 148
 149         l2c->mod_name = "octeon-l2c";
 150         l2c->ctl_name = "octeon_l2c_err";
 151
 152
 153         if (OCTEON_IS_OCTEON1PLUS()) {
 154                 union cvmx_l2t_err l2t_err;
 155                 union cvmx_l2d_err l2d_err;
 156
 157                 l2t_err.u64 = cvmx_read_csr(CVMX_L2T_ERR);
 158                 l2t_err.s.sec_intena = 0;       /* We poll */
 159                 l2t_err.s.ded_intena = 0;
 160                 cvmx_write_csr(CVMX_L2T_ERR, l2t_err.u64);
 161
 162                 l2d_err.u64 = cvmx_read_csr(CVMX_L2D_ERR);
 163                 l2d_err.s.sec_intena = 0;       /* We poll */
 164                 l2d_err.s.ded_intena = 0;
 165                 cvmx_write_csr(CVMX_L2T_ERR, l2d_err.u64);
 166
 167                 l2c->edac_check = octeon_l2c_poll_oct1;
 168         } else {
 169                 /* OCTEON II */
 170                 l2c->edac_check = octeon_l2c_poll_oct2;
 171         }
 172
 173         if (edac_device_add_device(l2c) > 0) {
 174                 pr_err("%s: edac_device_add_device() failed\n", __func__);
 175                 goto err;
 176         }
 177
 178
 179         return 0;
 180
 181 err:
 182         edac_device_free_ctl_info(l2c);
 183
 184         return -ENXIO;
 185 }
 186
 187 static int octeon_l2c_remove(struct platform_device *pdev)
 188 {
 189         struct edac_device_ctl_info *l2c = platform_get_drvdata(pdev);
 190
 191         edac_device_del_device(&pdev->dev);
 192         edac_device_free_ctl_info(l2c);
 193
 194         return 0;
 195 }
 196
 197 static struct platform_driver octeon_l2c_driver = {
 198         .probe = octeon_l2c_probe,
 199         .remove = octeon_l2c_remove,
 200         .driver = {
 201                    .name = "octeon_l2c_edac",
 202         }
 203 };
 204 module_platform_driver(octeon_l2c_driver);
 205
 206 MODULE_LICENSE("GPL");
 207 MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");