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1/*2 * This file is subject to the terms and conditions of the GNU General Public3 * License. See the file "COPYING" in the main directory of this archive4 * 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 23static 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 60static 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 126static 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 133static 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 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 181err:182 edac_device_free_ctl_info(l2c);183 184 return -ENXIO;185}186 187static void 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 195static struct platform_driver octeon_l2c_driver = {196 .probe = octeon_l2c_probe,197 .remove_new = octeon_l2c_remove,198 .driver = {199 .name = "octeon_l2c_edac",200 }201};202module_platform_driver(octeon_l2c_driver);203 204MODULE_DESCRIPTION("Cavium Octeon Secondary Caches (L2C) EDAC driver");205MODULE_LICENSE("GPL");206MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");207