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android_kernel_xiaomi_sm8350/drivers/edac/i82443bxgx_edac.c
Douglas Thompson 052dfb45cc drivers/edac: cleanup spaces-gotos after Lindent messup 
This patch fixes some remnant spaces inserted by the use of Lindent.
Seems Lindent adds some spaces when it shoulded. These have been fixed.
In addition, goto targets have issues, these have been fixed
in this patch.

Signed-off-by: Douglas Thompson <dougthompson@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19 10:04:55 -07:00

403 lines
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/*
* Intel 82443BX/GX (440BX/GX chipset) Memory Controller EDAC kernel
* module (C) 2006 Tim Small
*
* This file may be distributed under the terms of the GNU General
* Public License.
*
* Written by Tim Small <tim@buttersideup.com>, based on work by Linux
* Networx, Thayne Harbaugh, Dan Hollis <goemon at anime dot net> and
* others.
*
* 440GX fix by Jason Uhlenkott <juhlenko@akamai.com>.
*
* Written with reference to 82443BX Host Bridge Datasheet:
* http://www.intel.com/design/chipsets/440/documentation.htm
* references to this document given in [].
*
* This module doesn't support the 440LX, but it may be possible to
* make it do so (the 440LX's register definitions are different, but
* not completely so - I haven't studied them in enough detail to know
* how easy this would be).
*/
#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 I82443_REVISION "0.1"
#define EDAC_MOD_STR "i82443bxgx_edac"
/* The 82443BX supports SDRAM, or EDO (EDO for mobile only), "Memory
* Size: 8 MB to 512 MB (1GB with Registered DIMMs) with eight memory
* rows" "The 82443BX supports multiple-bit error detection and
* single-bit error correction when ECC mode is enabled and
* single/multi-bit error detection when correction is disabled.
* During writes to the DRAM, the 82443BX generates ECC for the data
* on a QWord basis. Partial QWord writes require a read-modify-write
* cycle when ECC is enabled."
*/
/* "Additionally, the 82443BX ensures that the data is corrected in
* main memory so that accumulation of errors is prevented. Another
* error within the same QWord would result in a double-bit error
* which is unrecoverable. This is known as hardware scrubbing since
* it requires no software intervention to correct the data in memory."
*/
/* [Also see page 100 (section 4.3), "DRAM Interface"]
* [Also see page 112 (section 4.6.1.4), ECC]
*/
#define I82443BXGX_NR_CSROWS 8
#define I82443BXGX_NR_CHANS 1
#define I82443BXGX_NR_DIMMS 4
/* 82443 PCI Device 0 */
#define I82443BXGX_NBXCFG 0x50 /* 32bit register starting at this PCI
* config space offset */
#define I82443BXGX_NBXCFG_OFFSET_NON_ECCROW 24 /* Array of bits, zero if
* row is non-ECC */
#define I82443BXGX_NBXCFG_OFFSET_DRAM_FREQ 12 /* 2 bits,00=100MHz,10=66 MHz */
#define I82443BXGX_NBXCFG_OFFSET_DRAM_INTEGRITY 7 /* 2 bits: */
#define I82443BXGX_NBXCFG_INTEGRITY_NONE 0x0 /* 00 = Non-ECC */
#define I82443BXGX_NBXCFG_INTEGRITY_EC 0x1 /* 01 = EC (only) */
#define I82443BXGX_NBXCFG_INTEGRITY_ECC 0x2 /* 10 = ECC */
#define I82443BXGX_NBXCFG_INTEGRITY_SCRUB 0x3 /* 11 = ECC + HW Scrub */
#define I82443BXGX_NBXCFG_OFFSET_ECC_DIAG_ENABLE 6
/* 82443 PCI Device 0 */
#define I82443BXGX_EAP 0x80 /* 32bit register starting at this PCI
* config space offset, Error Address
* Pointer Register */
#define I82443BXGX_EAP_OFFSET_EAP 12 /* High 20 bits of error address */
#define I82443BXGX_EAP_OFFSET_MBE BIT(1) /* Err at EAP was multi-bit (W1TC) */
#define I82443BXGX_EAP_OFFSET_SBE BIT(0) /* Err at EAP was single-bit (W1TC) */
#define I82443BXGX_ERRCMD 0x90 /* 8bit register starting at this PCI
* config space offset. */
#define I82443BXGX_ERRCMD_OFFSET_SERR_ON_MBE BIT(1) /* 1 = enable */
#define I82443BXGX_ERRCMD_OFFSET_SERR_ON_SBE BIT(0) /* 1 = enable */
#define I82443BXGX_ERRSTS 0x91 /* 16bit register starting at this PCI
* config space offset. */
#define I82443BXGX_ERRSTS_OFFSET_MBFRE 5 /* 3 bits - first err row multibit */
#define I82443BXGX_ERRSTS_OFFSET_MEF BIT(4) /* 1 = MBE occurred */
#define I82443BXGX_ERRSTS_OFFSET_SBFRE 1 /* 3 bits - first err row singlebit */
#define I82443BXGX_ERRSTS_OFFSET_SEF BIT(0) /* 1 = SBE occurred */
#define I82443BXGX_DRAMC 0x57 /* 8bit register starting at this PCI
* config space offset. */
#define I82443BXGX_DRAMC_OFFSET_DT 3 /* 2 bits, DRAM Type */
#define I82443BXGX_DRAMC_DRAM_IS_EDO 0 /* 00 = EDO */
#define I82443BXGX_DRAMC_DRAM_IS_SDRAM 1 /* 01 = SDRAM */
#define I82443BXGX_DRAMC_DRAM_IS_RSDRAM 2 /* 10 = Registered SDRAM */
#define I82443BXGX_DRB 0x60 /* 8x 8bit registers starting at this PCI
* config space offset. */
/* FIXME - don't poll when ECC disabled? */
struct i82443bxgx_edacmc_error_info {
u32 eap;
};
static struct edac_pci_ctl_info *i82443bxgx_pci;
static void i82443bxgx_edacmc_get_error_info(struct mem_ctl_info *mci,
struct i82443bxgx_edacmc_error_info
*info)
{
struct pci_dev *pdev;
pdev = to_pci_dev(mci->dev);
pci_read_config_dword(pdev, I82443BXGX_EAP, &info->eap);
if (info->eap & I82443BXGX_EAP_OFFSET_SBE)
/* Clear error to allow next error to be reported [p.61] */
pci_write_bits32(pdev, I82443BXGX_EAP,
I82443BXGX_EAP_OFFSET_SBE,
I82443BXGX_EAP_OFFSET_SBE);
if (info->eap & I82443BXGX_EAP_OFFSET_MBE)
/* Clear error to allow next error to be reported [p.61] */
pci_write_bits32(pdev, I82443BXGX_EAP,
I82443BXGX_EAP_OFFSET_MBE,
I82443BXGX_EAP_OFFSET_MBE);
}
static int i82443bxgx_edacmc_process_error_info(struct mem_ctl_info *mci,
struct
i82443bxgx_edacmc_error_info
*info, int handle_errors)
{
int error_found = 0;
u32 eapaddr, page, pageoffset;
/* bits 30:12 hold the 4kb block in which the error occurred
* [p.61] */
eapaddr = (info->eap & 0xfffff000);
page = eapaddr >> PAGE_SHIFT;
pageoffset = eapaddr - (page << PAGE_SHIFT);
if (info->eap & I82443BXGX_EAP_OFFSET_SBE) {
error_found = 1;
if (handle_errors)
edac_mc_handle_ce(mci, page, pageoffset,
/* 440BX/GX don't make syndrome information
* available */
0, edac_mc_find_csrow_by_page(mci, page), 0,
mci->ctl_name);
}
if (info->eap & I82443BXGX_EAP_OFFSET_MBE) {
error_found = 1;
if (handle_errors)
edac_mc_handle_ue(mci, page, pageoffset,
edac_mc_find_csrow_by_page(mci, page),
mci->ctl_name);
}
return error_found;
}
static void i82443bxgx_edacmc_check(struct mem_ctl_info *mci)
{
struct i82443bxgx_edacmc_error_info info;
debugf1("MC%d: " __FILE__ ": %s()\n", mci->mc_idx, __func__);
i82443bxgx_edacmc_get_error_info(mci, &info);
i82443bxgx_edacmc_process_error_info(mci, &info, 1);
}
static void i82443bxgx_init_csrows(struct mem_ctl_info *mci,
struct pci_dev *pdev,
enum edac_type edac_mode,
enum mem_type mtype)
{
struct csrow_info *csrow;
int index;
u8 drbar, dramc;
u32 row_base, row_high_limit, row_high_limit_last;
pci_read_config_byte(pdev, I82443BXGX_DRAMC, &dramc);
row_high_limit_last = 0;
for (index = 0; index < mci->nr_csrows; index++) {
csrow = &mci->csrows[index];
pci_read_config_byte(pdev, I82443BXGX_DRB + index, &drbar);
debugf1("MC%d: " __FILE__ ": %s() Row=%d DRB = %#0x\n",
mci->mc_idx, __func__, index, drbar);
row_high_limit = ((u32) drbar << 23);
/* find the DRAM Chip Select Base address and mask */
debugf1("MC%d: " __FILE__ ": %s() Row=%d, "
"Boundry Address=%#0x, Last = %#0x \n",
mci->mc_idx, __func__, index, row_high_limit,
row_high_limit_last);
/* 440GX goes to 2GB, represented with a DRB of 0. */
if (row_high_limit_last && !row_high_limit)
row_high_limit = 1UL << 31;
/* This row is empty [p.49] */
if (row_high_limit == row_high_limit_last)
continue;
row_base = row_high_limit_last;
csrow->first_page = row_base >> PAGE_SHIFT;
csrow->last_page = (row_high_limit >> PAGE_SHIFT) - 1;
csrow->nr_pages = csrow->last_page - csrow->first_page + 1;
/* EAP reports in 4kilobyte granularity [61] */
csrow->grain = 1 << 12;
csrow->mtype = mtype;
/* I don't think 440BX can tell you device type? FIXME? */
csrow->dtype = DEV_UNKNOWN;
/* Mode is global to all rows on 440BX */
csrow->edac_mode = edac_mode;
row_high_limit_last = row_high_limit;
}
}
static int i82443bxgx_edacmc_probe1(struct pci_dev *pdev, int dev_idx)
{
struct mem_ctl_info *mci;
u8 dramc;
u32 nbxcfg, ecc_mode;
enum mem_type mtype;
enum edac_type edac_mode;
debugf0("MC: " __FILE__ ": %s()\n", __func__);
/* Something is really hosed if PCI config space reads from
* the MC aren't working.
*/
if (pci_read_config_dword(pdev, I82443BXGX_NBXCFG, &nbxcfg))
return -EIO;
mci = edac_mc_alloc(0, I82443BXGX_NR_CSROWS, I82443BXGX_NR_CHANS);
if (mci == NULL)
return -ENOMEM;
debugf0("MC: " __FILE__ ": %s(): mci = %p\n", __func__, mci);
mci->dev = &pdev->dev;
mci->mtype_cap = MEM_FLAG_EDO | MEM_FLAG_SDR | MEM_FLAG_RDR;
mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_EC | EDAC_FLAG_SECDED;
pci_read_config_byte(pdev, I82443BXGX_DRAMC, &dramc);
switch ((dramc >> I82443BXGX_DRAMC_OFFSET_DT) & (BIT(0) | BIT(1))) {
case I82443BXGX_DRAMC_DRAM_IS_EDO:
mtype = MEM_EDO;
break;
case I82443BXGX_DRAMC_DRAM_IS_SDRAM:
mtype = MEM_SDR;
break;
case I82443BXGX_DRAMC_DRAM_IS_RSDRAM:
mtype = MEM_RDR;
break;
default:
debugf0("Unknown/reserved DRAM type value "
"in DRAMC register!\n");
mtype = -MEM_UNKNOWN;
}
if ((mtype == MEM_SDR) || (mtype == MEM_RDR))
mci->edac_cap = mci->edac_ctl_cap;
else
mci->edac_cap = EDAC_FLAG_NONE;
mci->scrub_cap = SCRUB_FLAG_HW_SRC;
pci_read_config_dword(pdev, I82443BXGX_NBXCFG, &nbxcfg);
ecc_mode = ((nbxcfg >> I82443BXGX_NBXCFG_OFFSET_DRAM_INTEGRITY) &
(BIT(0) | BIT(1)));
mci->scrub_mode = (ecc_mode == I82443BXGX_NBXCFG_INTEGRITY_SCRUB)
? SCRUB_HW_SRC : SCRUB_NONE;
switch (ecc_mode) {
case I82443BXGX_NBXCFG_INTEGRITY_NONE:
edac_mode = EDAC_NONE;
break;
case I82443BXGX_NBXCFG_INTEGRITY_EC:
edac_mode = EDAC_EC;
break;
case I82443BXGX_NBXCFG_INTEGRITY_ECC:
case I82443BXGX_NBXCFG_INTEGRITY_SCRUB:
edac_mode = EDAC_SECDED;
break;
default:
debugf0("%s(): Unknown/reserved ECC state "
"in NBXCFG register!\n", __func__);
edac_mode = EDAC_UNKNOWN;
break;
}
i82443bxgx_init_csrows(mci, pdev, edac_mode, mtype);
/* Many BIOSes don't clear error flags on boot, so do this
* here, or we get "phantom" errors occuring at module-load
* time. */
pci_write_bits32(pdev, I82443BXGX_EAP,
(I82443BXGX_EAP_OFFSET_SBE |
I82443BXGX_EAP_OFFSET_MBE),
(I82443BXGX_EAP_OFFSET_SBE |
I82443BXGX_EAP_OFFSET_MBE));
mci->mod_name = EDAC_MOD_STR;
mci->mod_ver = I82443_REVISION;
mci->ctl_name = "I82443BXGX";
mci->dev_name = pci_name(pdev);
mci->edac_check = i82443bxgx_edacmc_check;
mci->ctl_page_to_phys = NULL;
if (edac_mc_add_mc(mci, 0)) {
debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
goto fail;
}
/* allocating generic PCI control info */
i82443bxgx_pci = edac_pci_create_generic_ctl(&pdev->dev, EDAC_MOD_STR);
if (!i82443bxgx_pci) {
printk(KERN_WARNING
"%s(): Unable to create PCI control\n",
__func__);
printk(KERN_WARNING
"%s(): PCI error report via EDAC not setup\n",
__func__);
}
debugf3("MC: " __FILE__ ": %s(): success\n", __func__);
return 0;
fail:
edac_mc_free(mci);
return -ENODEV;
}
EXPORT_SYMBOL_GPL(i82443bxgx_edacmc_probe1);
/* returns count (>= 0), or negative on error */
static int __devinit i82443bxgx_edacmc_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
debugf0("MC: " __FILE__ ": %s()\n", __func__);
/* don't need to call pci_device_enable() */
return i82443bxgx_edacmc_probe1(pdev, ent->driver_data);
}
static void __devexit i82443bxgx_edacmc_remove_one(struct pci_dev *pdev)
{
struct mem_ctl_info *mci;
debugf0(__FILE__ ": %s()\n", __func__);
if (i82443bxgx_pci)
edac_pci_release_generic_ctl(i82443bxgx_pci);
if ((mci = edac_mc_del_mc(&pdev->dev)) == NULL)
return;
edac_mc_free(mci);
}
EXPORT_SYMBOL_GPL(i82443bxgx_edacmc_remove_one);
static const struct pci_device_id i82443bxgx_pci_tbl[] __devinitdata = {
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443BX_0)},
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443BX_2)},
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443GX_0)},
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443GX_2)},
{0,} /* 0 terminated list. */
};
MODULE_DEVICE_TABLE(pci, i82443bxgx_pci_tbl);
static struct pci_driver i82443bxgx_edacmc_driver = {
.name = EDAC_MOD_STR,
.probe = i82443bxgx_edacmc_init_one,
.remove = __devexit_p(i82443bxgx_edacmc_remove_one),
.id_table = i82443bxgx_pci_tbl,
};
static int __init i82443bxgx_edacmc_init(void)
{
return pci_register_driver(&i82443bxgx_edacmc_driver);
}
static void __exit i82443bxgx_edacmc_exit(void)
{
pci_unregister_driver(&i82443bxgx_edacmc_driver);
}
module_init(i82443bxgx_edacmc_init);
module_exit(i82443bxgx_edacmc_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Tim Small <tim@buttersideup.com> - WPAD");
MODULE_DESCRIPTION("EDAC MC support for Intel 82443BX/GX memory controllers");
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