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Release 4.11 drivers/edac/pasemi_edac.c

Directory: drivers/edac
/*
 * 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/edac.h>
#include "edac_module.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->pdev); 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; }

Contributors

PersonTokensPropCommitsCommitProp
Egor Martovetsky7898.73%150.00%
Mauro Carvalho Chehab11.27%150.00%
Total79100.00%2100.00%


static void pasemi_edac_process_error_info(struct mem_ctl_info *mci, u32 errsta) { struct pci_dev *pdev = to_pci_dev(mci->pdev); 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_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, mci->csrows[cs]->first_page, 0, 0, cs, 0, -1, mci->ctl_name, ""); } /* correctable/single-bit errors */ if (errsta & MCDEBUG_ERRSTA_SBE_STATUS) edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, mci->csrows[cs]->first_page, 0, 0, cs, 0, -1, mci->ctl_name, ""); }

Contributors

PersonTokensPropCommitsCommitProp
Egor Martovetsky12181.76%120.00%
Mauro Carvalho Chehab2718.24%480.00%
Total148100.00%5100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Egor Martovetsky32100.00%1100.00%
Total32100.00%1100.00%


static int pasemi_edac_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev, enum edac_type edac_mode) { struct csrow_info *csrow; struct dimm_info *dimm; u32 rankcfg; int index; for (index = 0; index < mci->nr_csrows; index++) { csrow = mci->csrows[index]; dimm = csrow->channels[0]->dimm; 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: dimm->nr_pages = 128 << (20 - PAGE_SHIFT); break; case 1: dimm->nr_pages = 256 << (20 - PAGE_SHIFT); break; case 2: case 3: dimm->nr_pages = 512 << (20 - PAGE_SHIFT); break; case 4: dimm->nr_pages = 1024 << (20 - PAGE_SHIFT); break; case 5: dimm->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 + dimm->nr_pages - 1; last_page_in_mmc += dimm->nr_pages; csrow->page_mask = 0; dimm->grain = PASEMI_EDAC_ERROR_GRAIN; dimm->mtype = MEM_DDR; dimm->dtype = DEV_UNKNOWN; dimm->edac_mode = edac_mode; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Egor Martovetsky24289.96%125.00%
Mauro Carvalho Chehab2710.04%375.00%
Total269100.00%4100.00%


static int pasemi_edac_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { struct mem_ctl_info *mci = NULL; struct edac_mc_layer layers[2]; 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); layers[0].type = EDAC_MC_LAYER_CHIP_SELECT; layers[0].size = PASEMI_EDAC_NR_CSROWS; layers[0].is_virt_csrow = true; layers[1].type = EDAC_MC_LAYER_CHANNEL; layers[1].size = PASEMI_EDAC_NR_CHANS; layers[1].is_virt_csrow = false; mci = edac_mc_alloc(system_mmc_id++, ARRAY_SIZE(layers), layers, 0); 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->pdev = &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,pwrficient-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; }

Contributors

PersonTokensPropCommitsCommitProp
Egor Martovetsky31781.07%116.67%
Mauro Carvalho Chehab7118.16%350.00%
Doug Thompson20.51%116.67%
Olof Johansson10.26%116.67%
Total391100.00%6100.00%


static void 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); }

Contributors

PersonTokensPropCommitsCommitProp
Egor Martovetsky35100.00%1100.00%
Total35100.00%1100.00%

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 = pasemi_edac_remove, .id_table = pasemi_edac_pci_tbl, };
static int __init pasemi_edac_init(void) { /* Ensure that the OPSTATE is set correctly for POLL or NMI */ opstate_init(); return pci_register_driver(&pasemi_edac_driver); }

Contributors

PersonTokensPropCommitsCommitProp
Egor Martovetsky1680.00%150.00%
Hitoshi Mitake420.00%150.00%
Total20100.00%2100.00%


static void __exit pasemi_edac_exit(void) { pci_unregister_driver(&pasemi_edac_driver); }

Contributors

PersonTokensPropCommitsCommitProp
Egor Martovetsky15100.00%1100.00%
Total15100.00%1100.00%

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 PWRficient memory controller"); module_param(edac_op_state, int, 0444); MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");

Overall Contributors

PersonTokensPropCommitsCommitProp
Egor Martovetsky110287.53%17.14%
Mauro Carvalho Chehab12710.09%857.14%
Hitoshi Mitake201.59%17.14%
Stephen Rothwell60.48%214.29%
Olof Johansson20.16%17.14%
Doug Thompson20.16%17.14%
Total1259100.00%14100.00%
Directory: drivers/edac
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