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alistair23-linux/drivers/edac/pasemi_edac.c
Olof Johansson 0d08a84770 [POWERPC] pasemi: Broaden specific references to 1682M 
There will be more product numbers in the future than just PA6T-1682M,
but they will share much of the features. Remove some of the explicit
references and compatibility checks with 1682M, and replace most of them
with the more generic term "PWRficient".

Signed-off-by: Olof Johansson <olof@lixom.net>
Acked-by: Michael Buesch <mb@bu3sch.de>
Acked-by: Doug Thompson <dougthompson@xmission.com>
2007-11-29 22:30:47 -06:00

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/*
* 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,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;
}
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 PWRficient memory controller");
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