1 /* 2 * Copyright (C) 2006-2007 PA Semi, Inc 3 * 4 * Author: Egor Martovetsky <egor@pasemi.com> 5 * Maintained by: Olof Johansson <olof@lixom.net> 6 * 7 * Driver for the PWRficient onchip memory controllers 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 */ 22 23 24 #include <linux/module.h> 25 #include <linux/init.h> 26 #include <linux/pci.h> 27 #include <linux/pci_ids.h> 28 #include <linux/edac.h> 29 #include "edac_core.h" 30 31 #define MODULE_NAME "pasemi_edac" 32 33 #define MCCFG_MCEN 0x300 34 #define MCCFG_MCEN_MMC_EN 0x00000001 35 #define MCCFG_ERRCOR 0x388 36 #define MCCFG_ERRCOR_RNK_FAIL_DET_EN 0x00000100 37 #define MCCFG_ERRCOR_ECC_GEN_EN 0x00000010 38 #define MCCFG_ERRCOR_ECC_CRR_EN 0x00000001 39 #define MCCFG_SCRUB 0x384 40 #define MCCFG_SCRUB_RGLR_SCRB_EN 0x00000001 41 #define MCDEBUG_ERRCTL1 0x728 42 #define MCDEBUG_ERRCTL1_RFL_LOG_EN 0x00080000 43 #define MCDEBUG_ERRCTL1_MBE_LOG_EN 0x00040000 44 #define MCDEBUG_ERRCTL1_SBE_LOG_EN 0x00020000 45 #define MCDEBUG_ERRSTA 0x730 46 #define MCDEBUG_ERRSTA_RFL_STATUS 0x00000004 47 #define MCDEBUG_ERRSTA_MBE_STATUS 0x00000002 48 #define MCDEBUG_ERRSTA_SBE_STATUS 0x00000001 49 #define MCDEBUG_ERRCNT1 0x734 50 #define MCDEBUG_ERRCNT1_SBE_CNT_OVRFLO 0x00000080 51 #define MCDEBUG_ERRLOG1A 0x738 52 #define MCDEBUG_ERRLOG1A_MERR_TYPE_M 0x30000000 53 #define MCDEBUG_ERRLOG1A_MERR_TYPE_NONE 0x00000000 54 #define MCDEBUG_ERRLOG1A_MERR_TYPE_SBE 0x10000000 55 #define MCDEBUG_ERRLOG1A_MERR_TYPE_MBE 0x20000000 56 #define MCDEBUG_ERRLOG1A_MERR_TYPE_RFL 0x30000000 57 #define MCDEBUG_ERRLOG1A_MERR_BA_M 0x00700000 58 #define MCDEBUG_ERRLOG1A_MERR_BA_S 20 59 #define MCDEBUG_ERRLOG1A_MERR_CS_M 0x00070000 60 #define MCDEBUG_ERRLOG1A_MERR_CS_S 16 61 #define MCDEBUG_ERRLOG1A_SYNDROME_M 0x0000ffff 62 #define MCDRAM_RANKCFG 0x114 63 #define MCDRAM_RANKCFG_EN 0x00000001 64 #define MCDRAM_RANKCFG_TYPE_SIZE_M 0x000001c0 65 #define MCDRAM_RANKCFG_TYPE_SIZE_S 6 66 67 #define PASEMI_EDAC_NR_CSROWS 8 68 #define PASEMI_EDAC_NR_CHANS 1 69 #define PASEMI_EDAC_ERROR_GRAIN 64 70 71 static int last_page_in_mmc; 72 static int system_mmc_id; 73 74 75 static u32 pasemi_edac_get_error_info(struct mem_ctl_info *mci) 76 { 77 struct pci_dev *pdev = to_pci_dev(mci->pdev); 78 u32 tmp; 79 80 pci_read_config_dword(pdev, MCDEBUG_ERRSTA, 81 &tmp); 82 83 tmp &= (MCDEBUG_ERRSTA_RFL_STATUS | MCDEBUG_ERRSTA_MBE_STATUS 84 | MCDEBUG_ERRSTA_SBE_STATUS); 85 86 if (tmp) { 87 if (tmp & MCDEBUG_ERRSTA_SBE_STATUS) 88 pci_write_config_dword(pdev, MCDEBUG_ERRCNT1, 89 MCDEBUG_ERRCNT1_SBE_CNT_OVRFLO); 90 pci_write_config_dword(pdev, MCDEBUG_ERRSTA, tmp); 91 } 92 93 return tmp; 94 } 95 96 static void pasemi_edac_process_error_info(struct mem_ctl_info *mci, u32 errsta) 97 { 98 struct pci_dev *pdev = to_pci_dev(mci->pdev); 99 u32 errlog1a; 100 u32 cs; 101 102 if (!errsta) 103 return; 104 105 pci_read_config_dword(pdev, MCDEBUG_ERRLOG1A, &errlog1a); 106 107 cs = (errlog1a & MCDEBUG_ERRLOG1A_MERR_CS_M) >> 108 MCDEBUG_ERRLOG1A_MERR_CS_S; 109 110 /* uncorrectable/multi-bit errors */ 111 if (errsta & (MCDEBUG_ERRSTA_MBE_STATUS | 112 MCDEBUG_ERRSTA_RFL_STATUS)) { 113 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 114 mci->csrows[cs]->first_page, 0, 0, 115 cs, 0, -1, mci->ctl_name, ""); 116 } 117 118 /* correctable/single-bit errors */ 119 if (errsta & MCDEBUG_ERRSTA_SBE_STATUS) 120 edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, 121 mci->csrows[cs]->first_page, 0, 0, 122 cs, 0, -1, mci->ctl_name, ""); 123 } 124 125 static void pasemi_edac_check(struct mem_ctl_info *mci) 126 { 127 u32 errsta; 128 129 errsta = pasemi_edac_get_error_info(mci); 130 if (errsta) 131 pasemi_edac_process_error_info(mci, errsta); 132 } 133 134 static int pasemi_edac_init_csrows(struct mem_ctl_info *mci, 135 struct pci_dev *pdev, 136 enum edac_type edac_mode) 137 { 138 struct csrow_info *csrow; 139 struct dimm_info *dimm; 140 u32 rankcfg; 141 int index; 142 143 for (index = 0; index < mci->nr_csrows; index++) { 144 csrow = mci->csrows[index]; 145 dimm = csrow->channels[0]->dimm; 146 147 pci_read_config_dword(pdev, 148 MCDRAM_RANKCFG + (index * 12), 149 &rankcfg); 150 151 if (!(rankcfg & MCDRAM_RANKCFG_EN)) 152 continue; 153 154 switch ((rankcfg & MCDRAM_RANKCFG_TYPE_SIZE_M) >> 155 MCDRAM_RANKCFG_TYPE_SIZE_S) { 156 case 0: 157 dimm->nr_pages = 128 << (20 - PAGE_SHIFT); 158 break; 159 case 1: 160 dimm->nr_pages = 256 << (20 - PAGE_SHIFT); 161 break; 162 case 2: 163 case 3: 164 dimm->nr_pages = 512 << (20 - PAGE_SHIFT); 165 break; 166 case 4: 167 dimm->nr_pages = 1024 << (20 - PAGE_SHIFT); 168 break; 169 case 5: 170 dimm->nr_pages = 2048 << (20 - PAGE_SHIFT); 171 break; 172 default: 173 edac_mc_printk(mci, KERN_ERR, 174 "Unrecognized Rank Config. rankcfg=%u\n", 175 rankcfg); 176 return -EINVAL; 177 } 178 179 csrow->first_page = last_page_in_mmc; 180 csrow->last_page = csrow->first_page + dimm->nr_pages - 1; 181 last_page_in_mmc += dimm->nr_pages; 182 csrow->page_mask = 0; 183 dimm->grain = PASEMI_EDAC_ERROR_GRAIN; 184 dimm->mtype = MEM_DDR; 185 dimm->dtype = DEV_UNKNOWN; 186 dimm->edac_mode = edac_mode; 187 } 188 return 0; 189 } 190 191 static int __devinit pasemi_edac_probe(struct pci_dev *pdev, 192 const struct pci_device_id *ent) 193 { 194 struct mem_ctl_info *mci = NULL; 195 struct edac_mc_layer layers[2]; 196 u32 errctl1, errcor, scrub, mcen; 197 198 pci_read_config_dword(pdev, MCCFG_MCEN, &mcen); 199 if (!(mcen & MCCFG_MCEN_MMC_EN)) 200 return -ENODEV; 201 202 /* 203 * We should think about enabling other error detection later on 204 */ 205 206 pci_read_config_dword(pdev, MCDEBUG_ERRCTL1, &errctl1); 207 errctl1 |= MCDEBUG_ERRCTL1_SBE_LOG_EN | 208 MCDEBUG_ERRCTL1_MBE_LOG_EN | 209 MCDEBUG_ERRCTL1_RFL_LOG_EN; 210 pci_write_config_dword(pdev, MCDEBUG_ERRCTL1, errctl1); 211 212 layers[0].type = EDAC_MC_LAYER_CHIP_SELECT; 213 layers[0].size = PASEMI_EDAC_NR_CSROWS; 214 layers[0].is_virt_csrow = true; 215 layers[1].type = EDAC_MC_LAYER_CHANNEL; 216 layers[1].size = PASEMI_EDAC_NR_CHANS; 217 layers[1].is_virt_csrow = false; 218 mci = edac_mc_alloc(system_mmc_id++, ARRAY_SIZE(layers), layers, 219 0); 220 if (mci == NULL) 221 return -ENOMEM; 222 223 pci_read_config_dword(pdev, MCCFG_ERRCOR, &errcor); 224 errcor |= MCCFG_ERRCOR_RNK_FAIL_DET_EN | 225 MCCFG_ERRCOR_ECC_GEN_EN | 226 MCCFG_ERRCOR_ECC_CRR_EN; 227 228 mci->pdev = &pdev->dev; 229 mci->mtype_cap = MEM_FLAG_DDR | MEM_FLAG_RDDR; 230 mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_EC | EDAC_FLAG_SECDED; 231 mci->edac_cap = (errcor & MCCFG_ERRCOR_ECC_GEN_EN) ? 232 ((errcor & MCCFG_ERRCOR_ECC_CRR_EN) ? 233 (EDAC_FLAG_EC | EDAC_FLAG_SECDED) : EDAC_FLAG_EC) : 234 EDAC_FLAG_NONE; 235 mci->mod_name = MODULE_NAME; 236 mci->dev_name = pci_name(pdev); 237 mci->ctl_name = "pasemi,pwrficient-mc"; 238 mci->edac_check = pasemi_edac_check; 239 mci->ctl_page_to_phys = NULL; 240 pci_read_config_dword(pdev, MCCFG_SCRUB, &scrub); 241 mci->scrub_cap = SCRUB_FLAG_HW_PROG | SCRUB_FLAG_HW_SRC; 242 mci->scrub_mode = 243 ((errcor & MCCFG_ERRCOR_ECC_CRR_EN) ? SCRUB_FLAG_HW_SRC : 0) | 244 ((scrub & MCCFG_SCRUB_RGLR_SCRB_EN) ? SCRUB_FLAG_HW_PROG : 0); 245 246 if (pasemi_edac_init_csrows(mci, pdev, 247 (mci->edac_cap & EDAC_FLAG_SECDED) ? 248 EDAC_SECDED : 249 ((mci->edac_cap & EDAC_FLAG_EC) ? 250 EDAC_EC : EDAC_NONE))) 251 goto fail; 252 253 /* 254 * Clear status 255 */ 256 pasemi_edac_get_error_info(mci); 257 258 if (edac_mc_add_mc(mci)) 259 goto fail; 260 261 /* get this far and it's successful */ 262 return 0; 263 264 fail: 265 edac_mc_free(mci); 266 return -ENODEV; 267 } 268 269 static void __devexit pasemi_edac_remove(struct pci_dev *pdev) 270 { 271 struct mem_ctl_info *mci = edac_mc_del_mc(&pdev->dev); 272 273 if (!mci) 274 return; 275 276 edac_mc_free(mci); 277 } 278 279 280 static const struct pci_device_id pasemi_edac_pci_tbl[] = { 281 { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa00a) }, 282 { } 283 }; 284 285 MODULE_DEVICE_TABLE(pci, pasemi_edac_pci_tbl); 286 287 static struct pci_driver pasemi_edac_driver = { 288 .name = MODULE_NAME, 289 .probe = pasemi_edac_probe, 290 .remove = __devexit_p(pasemi_edac_remove), 291 .id_table = pasemi_edac_pci_tbl, 292 }; 293 294 static int __init pasemi_edac_init(void) 295 { 296 /* Ensure that the OPSTATE is set correctly for POLL or NMI */ 297 opstate_init(); 298 299 return pci_register_driver(&pasemi_edac_driver); 300 } 301 302 static void __exit pasemi_edac_exit(void) 303 { 304 pci_unregister_driver(&pasemi_edac_driver); 305 } 306 307 module_init(pasemi_edac_init); 308 module_exit(pasemi_edac_exit); 309 310 MODULE_LICENSE("GPL"); 311 MODULE_AUTHOR("Egor Martovetsky <egor@pasemi.com>"); 312 MODULE_DESCRIPTION("MC support for PA Semi PWRficient memory controller"); 313 module_param(edac_op_state, int, 0444); 314 MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI"); 315 316