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_core.h" 20 #include "edac_module.h" 21 22 #define EDAC_MOD_STR "octeon-l2c" 23 24 static void octeon_l2c_poll_oct1(struct edac_device_ctl_info *l2c) 25 { 26 union cvmx_l2t_err l2t_err, l2t_err_reset; 27 union cvmx_l2d_err l2d_err, l2d_err_reset; 28 29 l2t_err_reset.u64 = 0; 30 l2t_err.u64 = cvmx_read_csr(CVMX_L2T_ERR); 31 if (l2t_err.s.sec_err) { 32 edac_device_handle_ce(l2c, 0, 0, 33 "Tag Single bit error (corrected)"); 34 l2t_err_reset.s.sec_err = 1; 35 } 36 if (l2t_err.s.ded_err) { 37 edac_device_handle_ue(l2c, 0, 0, 38 "Tag Double bit error (detected)"); 39 l2t_err_reset.s.ded_err = 1; 40 } 41 if (l2t_err_reset.u64) 42 cvmx_write_csr(CVMX_L2T_ERR, l2t_err_reset.u64); 43 44 l2d_err_reset.u64 = 0; 45 l2d_err.u64 = cvmx_read_csr(CVMX_L2D_ERR); 46 if (l2d_err.s.sec_err) { 47 edac_device_handle_ce(l2c, 0, 1, 48 "Data Single bit error (corrected)"); 49 l2d_err_reset.s.sec_err = 1; 50 } 51 if (l2d_err.s.ded_err) { 52 edac_device_handle_ue(l2c, 0, 1, 53 "Data Double bit error (detected)"); 54 l2d_err_reset.s.ded_err = 1; 55 } 56 if (l2d_err_reset.u64) 57 cvmx_write_csr(CVMX_L2D_ERR, l2d_err_reset.u64); 58 59 } 60 61 static void _octeon_l2c_poll_oct2(struct edac_device_ctl_info *l2c, int tad) 62 { 63 union cvmx_l2c_err_tdtx err_tdtx, err_tdtx_reset; 64 union cvmx_l2c_err_ttgx err_ttgx, err_ttgx_reset; 65 char buf1[64]; 66 char buf2[80]; 67 68 err_tdtx_reset.u64 = 0; 69 err_tdtx.u64 = cvmx_read_csr(CVMX_L2C_ERR_TDTX(tad)); 70 if (err_tdtx.s.dbe || err_tdtx.s.sbe || 71 err_tdtx.s.vdbe || err_tdtx.s.vsbe) 72 snprintf(buf1, sizeof(buf1), 73 "type:%d, syn:0x%x, way:%d", 74 err_tdtx.s.type, err_tdtx.s.syn, err_tdtx.s.wayidx); 75 76 if (err_tdtx.s.dbe) { 77 snprintf(buf2, sizeof(buf2), 78 "L2D Double bit error (detected):%s", buf1); 79 err_tdtx_reset.s.dbe = 1; 80 edac_device_handle_ue(l2c, tad, 1, buf2); 81 } 82 if (err_tdtx.s.sbe) { 83 snprintf(buf2, sizeof(buf2), 84 "L2D Single bit error (corrected):%s", buf1); 85 err_tdtx_reset.s.sbe = 1; 86 edac_device_handle_ce(l2c, tad, 1, buf2); 87 } 88 if (err_tdtx.s.vdbe) { 89 snprintf(buf2, sizeof(buf2), 90 "VBF Double bit error (detected):%s", buf1); 91 err_tdtx_reset.s.vdbe = 1; 92 edac_device_handle_ue(l2c, tad, 1, buf2); 93 } 94 if (err_tdtx.s.vsbe) { 95 snprintf(buf2, sizeof(buf2), 96 "VBF Single bit error (corrected):%s", buf1); 97 err_tdtx_reset.s.vsbe = 1; 98 edac_device_handle_ce(l2c, tad, 1, buf2); 99 } 100 if (err_tdtx_reset.u64) 101 cvmx_write_csr(CVMX_L2C_ERR_TDTX(tad), err_tdtx_reset.u64); 102 103 err_ttgx_reset.u64 = 0; 104 err_ttgx.u64 = cvmx_read_csr(CVMX_L2C_ERR_TTGX(tad)); 105 106 if (err_ttgx.s.dbe || err_ttgx.s.sbe) 107 snprintf(buf1, sizeof(buf1), 108 "type:%d, syn:0x%x, way:%d", 109 err_ttgx.s.type, err_ttgx.s.syn, err_ttgx.s.wayidx); 110 111 if (err_ttgx.s.dbe) { 112 snprintf(buf2, sizeof(buf2), 113 "Tag Double bit error (detected):%s", buf1); 114 err_ttgx_reset.s.dbe = 1; 115 edac_device_handle_ue(l2c, tad, 0, buf2); 116 } 117 if (err_ttgx.s.sbe) { 118 snprintf(buf2, sizeof(buf2), 119 "Tag Single bit error (corrected):%s", buf1); 120 err_ttgx_reset.s.sbe = 1; 121 edac_device_handle_ce(l2c, tad, 0, buf2); 122 } 123 if (err_ttgx_reset.u64) 124 cvmx_write_csr(CVMX_L2C_ERR_TTGX(tad), err_ttgx_reset.u64); 125 } 126 127 static void octeon_l2c_poll_oct2(struct edac_device_ctl_info *l2c) 128 { 129 int i; 130 for (i = 0; i < l2c->nr_instances; i++) 131 _octeon_l2c_poll_oct2(l2c, i); 132 } 133 134 static int octeon_l2c_probe(struct platform_device *pdev) 135 { 136 struct edac_device_ctl_info *l2c; 137 138 int num_tads = OCTEON_IS_MODEL(OCTEON_CN68XX) ? 4 : 1; 139 140 /* 'Tags' are block 0, 'Data' is block 1*/ 141 l2c = edac_device_alloc_ctl_info(0, "l2c", num_tads, "l2c", 2, 0, 142 NULL, 0, edac_device_alloc_index()); 143 if (!l2c) 144 return -ENOMEM; 145 146 l2c->dev = &pdev->dev; 147 platform_set_drvdata(pdev, l2c); 148 l2c->dev_name = dev_name(&pdev->dev); 149 150 l2c->mod_name = "octeon-l2c"; 151 l2c->ctl_name = "octeon_l2c_err"; 152 153 154 if (OCTEON_IS_OCTEON1PLUS()) { 155 union cvmx_l2t_err l2t_err; 156 union cvmx_l2d_err l2d_err; 157 158 l2t_err.u64 = cvmx_read_csr(CVMX_L2T_ERR); 159 l2t_err.s.sec_intena = 0; /* We poll */ 160 l2t_err.s.ded_intena = 0; 161 cvmx_write_csr(CVMX_L2T_ERR, l2t_err.u64); 162 163 l2d_err.u64 = cvmx_read_csr(CVMX_L2D_ERR); 164 l2d_err.s.sec_intena = 0; /* We poll */ 165 l2d_err.s.ded_intena = 0; 166 cvmx_write_csr(CVMX_L2T_ERR, l2d_err.u64); 167 168 l2c->edac_check = octeon_l2c_poll_oct1; 169 } else { 170 /* OCTEON II */ 171 l2c->edac_check = octeon_l2c_poll_oct2; 172 } 173 174 if (edac_device_add_device(l2c) > 0) { 175 pr_err("%s: edac_device_add_device() failed\n", __func__); 176 goto err; 177 } 178 179 180 return 0; 181 182 err: 183 edac_device_free_ctl_info(l2c); 184 185 return -ENXIO; 186 } 187 188 static int octeon_l2c_remove(struct platform_device *pdev) 189 { 190 struct edac_device_ctl_info *l2c = platform_get_drvdata(pdev); 191 192 edac_device_del_device(&pdev->dev); 193 edac_device_free_ctl_info(l2c); 194 195 return 0; 196 } 197 198 static struct platform_driver octeon_l2c_driver = { 199 .probe = octeon_l2c_probe, 200 .remove = octeon_l2c_remove, 201 .driver = { 202 .name = "octeon_l2c_edac", 203 } 204 }; 205 module_platform_driver(octeon_l2c_driver); 206 207 MODULE_LICENSE("GPL"); 208 MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>"); 209