308 lines
8.2 KiB
C
308 lines
8.2 KiB
C
/*
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* Copyright (C) 2006-2007 PA Semi, Inc
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*
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* Author: Egor Martovetsky <egor@pasemi.com>
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* Maintained by: Olof Johansson <olof@lixom.net>
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*
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* Driver for the PWRficient onchip memory controllers
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/pci_ids.h>
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#include <linux/slab.h>
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#include <linux/edac.h>
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#include "edac_core.h"
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#define MODULE_NAME "pasemi_edac"
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#define MCCFG_MCEN 0x300
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#define MCCFG_MCEN_MMC_EN 0x00000001
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#define MCCFG_ERRCOR 0x388
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#define MCCFG_ERRCOR_RNK_FAIL_DET_EN 0x00000100
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#define MCCFG_ERRCOR_ECC_GEN_EN 0x00000010
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#define MCCFG_ERRCOR_ECC_CRR_EN 0x00000001
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#define MCCFG_SCRUB 0x384
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#define MCCFG_SCRUB_RGLR_SCRB_EN 0x00000001
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#define MCDEBUG_ERRCTL1 0x728
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#define MCDEBUG_ERRCTL1_RFL_LOG_EN 0x00080000
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#define MCDEBUG_ERRCTL1_MBE_LOG_EN 0x00040000
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#define MCDEBUG_ERRCTL1_SBE_LOG_EN 0x00020000
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#define MCDEBUG_ERRSTA 0x730
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#define MCDEBUG_ERRSTA_RFL_STATUS 0x00000004
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#define MCDEBUG_ERRSTA_MBE_STATUS 0x00000002
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#define MCDEBUG_ERRSTA_SBE_STATUS 0x00000001
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#define MCDEBUG_ERRCNT1 0x734
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#define MCDEBUG_ERRCNT1_SBE_CNT_OVRFLO 0x00000080
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#define MCDEBUG_ERRLOG1A 0x738
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#define MCDEBUG_ERRLOG1A_MERR_TYPE_M 0x30000000
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#define MCDEBUG_ERRLOG1A_MERR_TYPE_NONE 0x00000000
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#define MCDEBUG_ERRLOG1A_MERR_TYPE_SBE 0x10000000
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#define MCDEBUG_ERRLOG1A_MERR_TYPE_MBE 0x20000000
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#define MCDEBUG_ERRLOG1A_MERR_TYPE_RFL 0x30000000
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#define MCDEBUG_ERRLOG1A_MERR_BA_M 0x00700000
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#define MCDEBUG_ERRLOG1A_MERR_BA_S 20
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#define MCDEBUG_ERRLOG1A_MERR_CS_M 0x00070000
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#define MCDEBUG_ERRLOG1A_MERR_CS_S 16
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#define MCDEBUG_ERRLOG1A_SYNDROME_M 0x0000ffff
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#define MCDRAM_RANKCFG 0x114
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#define MCDRAM_RANKCFG_EN 0x00000001
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#define MCDRAM_RANKCFG_TYPE_SIZE_M 0x000001c0
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#define MCDRAM_RANKCFG_TYPE_SIZE_S 6
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#define PASEMI_EDAC_NR_CSROWS 8
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#define PASEMI_EDAC_NR_CHANS 1
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#define PASEMI_EDAC_ERROR_GRAIN 64
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static int last_page_in_mmc;
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static int system_mmc_id;
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static u32 pasemi_edac_get_error_info(struct mem_ctl_info *mci)
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{
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struct pci_dev *pdev = to_pci_dev(mci->dev);
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u32 tmp;
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pci_read_config_dword(pdev, MCDEBUG_ERRSTA,
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&tmp);
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tmp &= (MCDEBUG_ERRSTA_RFL_STATUS | MCDEBUG_ERRSTA_MBE_STATUS
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| MCDEBUG_ERRSTA_SBE_STATUS);
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if (tmp) {
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if (tmp & MCDEBUG_ERRSTA_SBE_STATUS)
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pci_write_config_dword(pdev, MCDEBUG_ERRCNT1,
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MCDEBUG_ERRCNT1_SBE_CNT_OVRFLO);
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pci_write_config_dword(pdev, MCDEBUG_ERRSTA, tmp);
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}
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return tmp;
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}
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static void pasemi_edac_process_error_info(struct mem_ctl_info *mci, u32 errsta)
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{
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struct pci_dev *pdev = to_pci_dev(mci->dev);
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u32 errlog1a;
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u32 cs;
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if (!errsta)
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return;
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pci_read_config_dword(pdev, MCDEBUG_ERRLOG1A, &errlog1a);
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cs = (errlog1a & MCDEBUG_ERRLOG1A_MERR_CS_M) >>
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MCDEBUG_ERRLOG1A_MERR_CS_S;
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/* uncorrectable/multi-bit errors */
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if (errsta & (MCDEBUG_ERRSTA_MBE_STATUS |
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MCDEBUG_ERRSTA_RFL_STATUS)) {
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edac_mc_handle_ue(mci, mci->csrows[cs].first_page, 0,
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cs, mci->ctl_name);
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}
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/* correctable/single-bit errors */
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if (errsta & MCDEBUG_ERRSTA_SBE_STATUS) {
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edac_mc_handle_ce(mci, mci->csrows[cs].first_page, 0,
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0, cs, 0, mci->ctl_name);
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}
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}
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static void pasemi_edac_check(struct mem_ctl_info *mci)
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{
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u32 errsta;
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errsta = pasemi_edac_get_error_info(mci);
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if (errsta)
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pasemi_edac_process_error_info(mci, errsta);
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}
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static int pasemi_edac_init_csrows(struct mem_ctl_info *mci,
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struct pci_dev *pdev,
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enum edac_type edac_mode)
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{
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struct csrow_info *csrow;
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u32 rankcfg;
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int index;
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for (index = 0; index < mci->nr_csrows; index++) {
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csrow = &mci->csrows[index];
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pci_read_config_dword(pdev,
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MCDRAM_RANKCFG + (index * 12),
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&rankcfg);
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if (!(rankcfg & MCDRAM_RANKCFG_EN))
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continue;
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switch ((rankcfg & MCDRAM_RANKCFG_TYPE_SIZE_M) >>
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MCDRAM_RANKCFG_TYPE_SIZE_S) {
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case 0:
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csrow->nr_pages = 128 << (20 - PAGE_SHIFT);
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break;
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case 1:
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csrow->nr_pages = 256 << (20 - PAGE_SHIFT);
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break;
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case 2:
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case 3:
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csrow->nr_pages = 512 << (20 - PAGE_SHIFT);
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break;
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case 4:
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csrow->nr_pages = 1024 << (20 - PAGE_SHIFT);
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break;
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case 5:
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csrow->nr_pages = 2048 << (20 - PAGE_SHIFT);
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break;
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default:
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edac_mc_printk(mci, KERN_ERR,
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"Unrecognized Rank Config. rankcfg=%u\n",
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rankcfg);
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return -EINVAL;
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}
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csrow->first_page = last_page_in_mmc;
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csrow->last_page = csrow->first_page + csrow->nr_pages - 1;
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last_page_in_mmc += csrow->nr_pages;
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csrow->page_mask = 0;
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csrow->grain = PASEMI_EDAC_ERROR_GRAIN;
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csrow->mtype = MEM_DDR;
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csrow->dtype = DEV_UNKNOWN;
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csrow->edac_mode = edac_mode;
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}
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return 0;
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}
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static int __devinit pasemi_edac_probe(struct pci_dev *pdev,
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const struct pci_device_id *ent)
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{
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struct mem_ctl_info *mci = NULL;
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u32 errctl1, errcor, scrub, mcen;
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pci_read_config_dword(pdev, MCCFG_MCEN, &mcen);
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if (!(mcen & MCCFG_MCEN_MMC_EN))
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return -ENODEV;
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/*
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* We should think about enabling other error detection later on
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*/
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pci_read_config_dword(pdev, MCDEBUG_ERRCTL1, &errctl1);
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errctl1 |= MCDEBUG_ERRCTL1_SBE_LOG_EN |
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MCDEBUG_ERRCTL1_MBE_LOG_EN |
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MCDEBUG_ERRCTL1_RFL_LOG_EN;
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pci_write_config_dword(pdev, MCDEBUG_ERRCTL1, errctl1);
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mci = edac_mc_alloc(0, PASEMI_EDAC_NR_CSROWS, PASEMI_EDAC_NR_CHANS,
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system_mmc_id++);
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if (mci == NULL)
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return -ENOMEM;
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pci_read_config_dword(pdev, MCCFG_ERRCOR, &errcor);
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errcor |= MCCFG_ERRCOR_RNK_FAIL_DET_EN |
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MCCFG_ERRCOR_ECC_GEN_EN |
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MCCFG_ERRCOR_ECC_CRR_EN;
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mci->dev = &pdev->dev;
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mci->mtype_cap = MEM_FLAG_DDR | MEM_FLAG_RDDR;
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mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_EC | EDAC_FLAG_SECDED;
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mci->edac_cap = (errcor & MCCFG_ERRCOR_ECC_GEN_EN) ?
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((errcor & MCCFG_ERRCOR_ECC_CRR_EN) ?
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(EDAC_FLAG_EC | EDAC_FLAG_SECDED) : EDAC_FLAG_EC) :
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EDAC_FLAG_NONE;
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mci->mod_name = MODULE_NAME;
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mci->dev_name = pci_name(pdev);
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mci->ctl_name = "pasemi,pwrficient-mc";
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mci->edac_check = pasemi_edac_check;
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mci->ctl_page_to_phys = NULL;
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pci_read_config_dword(pdev, MCCFG_SCRUB, &scrub);
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mci->scrub_cap = SCRUB_FLAG_HW_PROG | SCRUB_FLAG_HW_SRC;
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mci->scrub_mode =
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((errcor & MCCFG_ERRCOR_ECC_CRR_EN) ? SCRUB_FLAG_HW_SRC : 0) |
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((scrub & MCCFG_SCRUB_RGLR_SCRB_EN) ? SCRUB_FLAG_HW_PROG : 0);
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if (pasemi_edac_init_csrows(mci, pdev,
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(mci->edac_cap & EDAC_FLAG_SECDED) ?
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EDAC_SECDED :
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((mci->edac_cap & EDAC_FLAG_EC) ?
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EDAC_EC : EDAC_NONE)))
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goto fail;
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/*
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* Clear status
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*/
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pasemi_edac_get_error_info(mci);
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if (edac_mc_add_mc(mci))
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goto fail;
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/* get this far and it's successful */
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return 0;
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fail:
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edac_mc_free(mci);
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return -ENODEV;
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}
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static void __devexit pasemi_edac_remove(struct pci_dev *pdev)
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{
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struct mem_ctl_info *mci = edac_mc_del_mc(&pdev->dev);
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if (!mci)
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return;
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edac_mc_free(mci);
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}
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static const struct pci_device_id pasemi_edac_pci_tbl[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa00a) },
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{ }
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};
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MODULE_DEVICE_TABLE(pci, pasemi_edac_pci_tbl);
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static struct pci_driver pasemi_edac_driver = {
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.name = MODULE_NAME,
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.probe = pasemi_edac_probe,
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.remove = __devexit_p(pasemi_edac_remove),
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.id_table = pasemi_edac_pci_tbl,
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};
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static int __init pasemi_edac_init(void)
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{
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/* Ensure that the OPSTATE is set correctly for POLL or NMI */
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opstate_init();
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return pci_register_driver(&pasemi_edac_driver);
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}
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static void __exit pasemi_edac_exit(void)
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{
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pci_unregister_driver(&pasemi_edac_driver);
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}
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module_init(pasemi_edac_init);
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module_exit(pasemi_edac_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Egor Martovetsky <egor@pasemi.com>");
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MODULE_DESCRIPTION("MC support for PA Semi PWRficient memory controller");
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module_param(edac_op_state, int, 0444);
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MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");
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