/* * Copyright (C) 2006-2007 PA Semi, Inc * * Author: Egor Martovetsky <egor@pasemi.com> * Maintained by: Olof Johansson <olof@lixom.net> * * Driver for the PWRficient onchip memory controllers * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/module.h> #include <linux/init.h> #include <linux/pci.h> #include <linux/pci_ids.h> #include <linux/slab.h> #include "edac_core.h" #define MODULE_NAME "pasemi_edac" #define MCCFG_MCEN 0x300 #define MCCFG_MCEN_MMC_EN 0x00000001 #define MCCFG_ERRCOR 0x388 #define MCCFG_ERRCOR_RNK_FAIL_DET_EN 0x00000100 #define MCCFG_ERRCOR_ECC_GEN_EN 0x00000010 #define MCCFG_ERRCOR_ECC_CRR_EN 0x00000001 #define MCCFG_SCRUB 0x384 #define MCCFG_SCRUB_RGLR_SCRB_EN 0x00000001 #define MCDEBUG_ERRCTL1 0x728 #define MCDEBUG_ERRCTL1_RFL_LOG_EN 0x00080000 #define MCDEBUG_ERRCTL1_MBE_LOG_EN 0x00040000 #define MCDEBUG_ERRCTL1_SBE_LOG_EN 0x00020000 #define MCDEBUG_ERRSTA 0x730 #define MCDEBUG_ERRSTA_RFL_STATUS 0x00000004 #define MCDEBUG_ERRSTA_MBE_STATUS 0x00000002 #define MCDEBUG_ERRSTA_SBE_STATUS 0x00000001 #define MCDEBUG_ERRCNT1 0x734 #define MCDEBUG_ERRCNT1_SBE_CNT_OVRFLO 0x00000080 #define MCDEBUG_ERRLOG1A 0x738 #define MCDEBUG_ERRLOG1A_MERR_TYPE_M 0x30000000 #define MCDEBUG_ERRLOG1A_MERR_TYPE_NONE 0x00000000 #define MCDEBUG_ERRLOG1A_MERR_TYPE_SBE 0x10000000 #define MCDEBUG_ERRLOG1A_MERR_TYPE_MBE 0x20000000 #define MCDEBUG_ERRLOG1A_MERR_TYPE_RFL 0x30000000 #define MCDEBUG_ERRLOG1A_MERR_BA_M 0x00700000 #define MCDEBUG_ERRLOG1A_MERR_BA_S 20 #define MCDEBUG_ERRLOG1A_MERR_CS_M 0x00070000 #define MCDEBUG_ERRLOG1A_MERR_CS_S 16 #define MCDEBUG_ERRLOG1A_SYNDROME_M 0x0000ffff #define MCDRAM_RANKCFG 0x114 #define MCDRAM_RANKCFG_EN 0x00000001 #define MCDRAM_RANKCFG_TYPE_SIZE_M 0x000001c0 #define MCDRAM_RANKCFG_TYPE_SIZE_S 6 #define PASEMI_EDAC_NR_CSROWS 8 #define PASEMI_EDAC_NR_CHANS 1 #define PASEMI_EDAC_ERROR_GRAIN 64 static int last_page_in_mmc; static int system_mmc_id; static u32 pasemi_edac_get_error_info(struct mem_ctl_info *mci) { struct pci_dev *pdev = to_pci_dev(mci->dev); u32 tmp; pci_read_config_dword(pdev, MCDEBUG_ERRSTA, &tmp); tmp &= (MCDEBUG_ERRSTA_RFL_STATUS | MCDEBUG_ERRSTA_MBE_STATUS | MCDEBUG_ERRSTA_SBE_STATUS); if (tmp) { if (tmp & MCDEBUG_ERRSTA_SBE_STATUS) pci_write_config_dword(pdev, MCDEBUG_ERRCNT1, MCDEBUG_ERRCNT1_SBE_CNT_OVRFLO); pci_write_config_dword(pdev, MCDEBUG_ERRSTA, tmp); } return tmp; } static void pasemi_edac_process_error_info(struct mem_ctl_info *mci, u32 errsta) { struct pci_dev *pdev = to_pci_dev(mci->dev); u32 errlog1a; u32 cs; if (!errsta) return; pci_read_config_dword(pdev, MCDEBUG_ERRLOG1A, &errlog1a); cs = (errlog1a & MCDEBUG_ERRLOG1A_MERR_CS_M) >> MCDEBUG_ERRLOG1A_MERR_CS_S; /* uncorrectable/multi-bit errors */ if (errsta & (MCDEBUG_ERRSTA_MBE_STATUS | MCDEBUG_ERRSTA_RFL_STATUS)) { edac_mc_handle_ue(mci, mci->csrows[cs].first_page, 0, cs, mci->ctl_name); } /* correctable/single-bit errors */ if (errsta & MCDEBUG_ERRSTA_SBE_STATUS) { edac_mc_handle_ce(mci, mci->csrows[cs].first_page, 0, 0, cs, 0, mci->ctl_name); } } static void pasemi_edac_check(struct mem_ctl_info *mci) { u32 errsta; errsta = pasemi_edac_get_error_info(mci); if (errsta) pasemi_edac_process_error_info(mci, errsta); } static int pasemi_edac_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev, enum edac_type edac_mode) { struct csrow_info *csrow; u32 rankcfg; int index; for (index = 0; index < mci->nr_csrows; index++) { csrow = &mci->csrows[index]; pci_read_config_dword(pdev, MCDRAM_RANKCFG + (index * 12), &rankcfg); if (!(rankcfg & MCDRAM_RANKCFG_EN)) continue; switch ((rankcfg & MCDRAM_RANKCFG_TYPE_SIZE_M) >> MCDRAM_RANKCFG_TYPE_SIZE_S) { case 0: csrow->nr_pages = 128 << (20 - PAGE_SHIFT); break; case 1: csrow->nr_pages = 256 << (20 - PAGE_SHIFT); break; case 2: case 3: csrow->nr_pages = 512 << (20 - PAGE_SHIFT); break; case 4: csrow->nr_pages = 1024 << (20 - PAGE_SHIFT); break; case 5: csrow->nr_pages = 2048 << (20 - PAGE_SHIFT); break; default: edac_mc_printk(mci, KERN_ERR, "Unrecognized Rank Config. rankcfg=%u\n", rankcfg); return -EINVAL; } csrow->first_page = last_page_in_mmc; csrow->last_page = csrow->first_page + csrow->nr_pages - 1; last_page_in_mmc += csrow->nr_pages; csrow->page_mask = 0; csrow->grain = PASEMI_EDAC_ERROR_GRAIN; csrow->mtype = MEM_DDR; csrow->dtype = DEV_UNKNOWN; csrow->edac_mode = edac_mode; } return 0; } static int __devinit pasemi_edac_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { struct mem_ctl_info *mci = NULL; u32 errctl1, errcor, scrub, mcen; pci_read_config_dword(pdev, MCCFG_MCEN, &mcen); if (!(mcen & MCCFG_MCEN_MMC_EN)) return -ENODEV; /* * We should think about enabling other error detection later on */ pci_read_config_dword(pdev, MCDEBUG_ERRCTL1, &errctl1); errctl1 |= MCDEBUG_ERRCTL1_SBE_LOG_EN | MCDEBUG_ERRCTL1_MBE_LOG_EN | MCDEBUG_ERRCTL1_RFL_LOG_EN; pci_write_config_dword(pdev, MCDEBUG_ERRCTL1, errctl1); mci = edac_mc_alloc(0, PASEMI_EDAC_NR_CSROWS, PASEMI_EDAC_NR_CHANS, system_mmc_id++); if (mci == NULL) return -ENOMEM; pci_read_config_dword(pdev, MCCFG_ERRCOR, &errcor); errcor |= MCCFG_ERRCOR_RNK_FAIL_DET_EN | MCCFG_ERRCOR_ECC_GEN_EN | MCCFG_ERRCOR_ECC_CRR_EN; mci->dev = &pdev->dev; mci->mtype_cap = MEM_FLAG_DDR | MEM_FLAG_RDDR; mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_EC | EDAC_FLAG_SECDED; mci->edac_cap = (errcor & MCCFG_ERRCOR_ECC_GEN_EN) ? ((errcor & MCCFG_ERRCOR_ECC_CRR_EN) ? (EDAC_FLAG_EC | EDAC_FLAG_SECDED) : EDAC_FLAG_EC) : EDAC_FLAG_NONE; mci->mod_name = MODULE_NAME; mci->dev_name = pci_name(pdev); mci->ctl_name = "pasemi,1682m-mc"; mci->edac_check = pasemi_edac_check; mci->ctl_page_to_phys = NULL; pci_read_config_dword(pdev, MCCFG_SCRUB, &scrub); mci->scrub_cap = SCRUB_FLAG_HW_PROG | SCRUB_FLAG_HW_SRC; mci->scrub_mode = ((errcor & MCCFG_ERRCOR_ECC_CRR_EN) ? SCRUB_FLAG_HW_SRC : 0) | ((scrub & MCCFG_SCRUB_RGLR_SCRB_EN) ? SCRUB_FLAG_HW_PROG : 0); if (pasemi_edac_init_csrows(mci, pdev, (mci->edac_cap & EDAC_FLAG_SECDED) ? EDAC_SECDED : ((mci->edac_cap & EDAC_FLAG_EC) ? EDAC_EC : EDAC_NONE))) goto fail; /* * Clear status */ pasemi_edac_get_error_info(mci); if (edac_mc_add_mc(mci)) goto fail; /* get this far and it's successful */ return 0; fail: edac_mc_free(mci); return -ENODEV; } static void __devexit pasemi_edac_remove(struct pci_dev *pdev) { struct mem_ctl_info *mci = edac_mc_del_mc(&pdev->dev); if (!mci) return; edac_mc_free(mci); } static const struct pci_device_id pasemi_edac_pci_tbl[] = { { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa00a) }, }; MODULE_DEVICE_TABLE(pci, pasemi_edac_pci_tbl); static struct pci_driver pasemi_edac_driver = { .name = MODULE_NAME, .probe = pasemi_edac_probe, .remove = __devexit_p(pasemi_edac_remove), .id_table = pasemi_edac_pci_tbl, }; static int __init pasemi_edac_init(void) { return pci_register_driver(&pasemi_edac_driver); } static void __exit pasemi_edac_exit(void) { pci_unregister_driver(&pasemi_edac_driver); } module_init(pasemi_edac_init); module_exit(pasemi_edac_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Egor Martovetsky <egor@pasemi.com>"); MODULE_DESCRIPTION("MC support for PA Semi PA6T-1682M memory controller");