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path: root/drivers/edac/i82875p_edac.c
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Diffstat (limited to 'drivers/edac/i82875p_edac.c')
-rw-r--r--drivers/edac/i82875p_edac.c112
1 files changed, 51 insertions, 61 deletions
diff --git a/drivers/edac/i82875p_edac.c b/drivers/edac/i82875p_edac.c
index aad1900a468..0aec92698f1 100644
--- a/drivers/edac/i82875p_edac.c
+++ b/drivers/edac/i82875p_edac.c
@@ -13,26 +13,19 @@
* Note: E7210 appears same as D82875P - zhenyu.z.wang at intel.com
*/
-
#include <linux/config.h>
#include <linux/module.h>
#include <linux/init.h>
-
#include <linux/pci.h>
#include <linux/pci_ids.h>
-
#include <linux/slab.h>
-
#include "edac_mc.h"
-
#define i82875p_printk(level, fmt, arg...) \
- edac_printk(level, "i82875p", fmt, ##arg)
-
+ edac_printk(level, "i82875p", fmt, ##arg)
#define i82875p_mc_printk(mci, level, fmt, arg...) \
- edac_mc_chipset_printk(mci, level, "i82875p", fmt, ##arg)
-
+ edac_mc_chipset_printk(mci, level, "i82875p", fmt, ##arg)
#ifndef PCI_DEVICE_ID_INTEL_82875_0
#define PCI_DEVICE_ID_INTEL_82875_0 0x2578
@@ -42,11 +35,9 @@
#define PCI_DEVICE_ID_INTEL_82875_6 0x257e
#endif /* PCI_DEVICE_ID_INTEL_82875_6 */
-
/* four csrows in dual channel, eight in single channel */
#define I82875P_NR_CSROWS(nr_chans) (8/(nr_chans))
-
/* Intel 82875p register addresses - device 0 function 0 - DRAM Controller */
#define I82875P_EAP 0x58 /* Error Address Pointer (32b)
*
@@ -95,7 +86,6 @@
* 0 reserved
*/
-
/* Intel 82875p register addresses - device 6 function 0 - DRAM Controller */
#define I82875P_PCICMD6 0x04 /* PCI Command Register (16b)
*
@@ -159,23 +149,19 @@
* 1:0 DRAM type 01=DDR
*/
-
enum i82875p_chips {
I82875P = 0,
};
-
struct i82875p_pvt {
struct pci_dev *ovrfl_pdev;
void __iomem *ovrfl_window;
};
-
struct i82875p_dev_info {
const char *ctl_name;
};
-
struct i82875p_error_info {
u16 errsts;
u32 eap;
@@ -184,17 +170,19 @@ struct i82875p_error_info {
u16 errsts2;
};
-
static const struct i82875p_dev_info i82875p_devs[] = {
[I82875P] = {
- .ctl_name = "i82875p"},
+ .ctl_name = "i82875p"
+ },
};
-static struct pci_dev *mci_pdev = NULL; /* init dev: in case that AGP code
- has already registered driver */
+static struct pci_dev *mci_pdev = NULL; /* init dev: in case that AGP code has
+ * already registered driver
+ */
+
static int i82875p_registered = 1;
-static void i82875p_get_error_info (struct mem_ctl_info *mci,
+static void i82875p_get_error_info(struct mem_ctl_info *mci,
struct i82875p_error_info *info)
{
/*
@@ -218,15 +206,16 @@ static void i82875p_get_error_info (struct mem_ctl_info *mci,
*/
if (!(info->errsts2 & 0x0081))
return;
+
if ((info->errsts ^ info->errsts2) & 0x0081) {
pci_read_config_dword(mci->pdev, I82875P_EAP, &info->eap);
pci_read_config_byte(mci->pdev, I82875P_DES, &info->des);
pci_read_config_byte(mci->pdev, I82875P_DERRSYN,
- &info->derrsyn);
+ &info->derrsyn);
}
}
-static int i82875p_process_error_info (struct mem_ctl_info *mci,
+static int i82875p_process_error_info(struct mem_ctl_info *mci,
struct i82875p_error_info *info, int handle_errors)
{
int row, multi_chan;
@@ -251,13 +240,12 @@ static int i82875p_process_error_info (struct mem_ctl_info *mci,
edac_mc_handle_ue(mci, info->eap, 0, row, "i82875p UE");
else
edac_mc_handle_ce(mci, info->eap, 0, info->derrsyn, row,
- multi_chan ? (info->des & 0x1) : 0,
- "i82875p CE");
+ multi_chan ? (info->des & 0x1) : 0,
+ "i82875p CE");
return 1;
}
-
static void i82875p_check(struct mem_ctl_info *mci)
{
struct i82875p_error_info info;
@@ -267,7 +255,6 @@ static void i82875p_check(struct mem_ctl_info *mci)
i82875p_process_error_info(mci, &info, 1);
}
-
#ifdef CONFIG_PROC_FS
extern int pci_proc_attach_device(struct pci_dev *);
#endif
@@ -281,7 +268,6 @@ static int i82875p_probe1(struct pci_dev *pdev, int dev_idx)
unsigned long last_cumul_size;
struct pci_dev *ovrfl_pdev;
void __iomem *ovrfl_window = NULL;
-
u32 drc;
u32 drc_chan; /* Number of channels 0=1chan,1=2chan */
u32 nr_chans;
@@ -289,7 +275,6 @@ static int i82875p_probe1(struct pci_dev *pdev, int dev_idx)
struct i82875p_error_info discard;
debugf0("%s()\n", __func__);
-
ovrfl_pdev = pci_get_device(PCI_VEND_DEV(INTEL, 82875_6), NULL);
if (!ovrfl_pdev) {
@@ -301,22 +286,23 @@ static int i82875p_probe1(struct pci_dev *pdev, int dev_idx)
*/
pci_write_bits8(pdev, 0xf4, 0x2, 0x2);
ovrfl_pdev =
- pci_scan_single_device(pdev->bus, PCI_DEVFN(6, 0));
+ pci_scan_single_device(pdev->bus, PCI_DEVFN(6, 0));
+
if (!ovrfl_pdev)
return -ENODEV;
}
+
#ifdef CONFIG_PROC_FS
if (!ovrfl_pdev->procent && pci_proc_attach_device(ovrfl_pdev)) {
i82875p_printk(KERN_ERR,
- "%s(): Failed to attach overflow device\n",
- __func__);
+ "%s(): Failed to attach overflow device\n", __func__);
return -ENODEV;
}
-#endif /* CONFIG_PROC_FS */
+#endif
+ /* CONFIG_PROC_FS */
if (pci_enable_device(ovrfl_pdev)) {
i82875p_printk(KERN_ERR,
- "%s(): Failed to enable overflow device\n",
- __func__);
+ "%s(): Failed to enable overflow device\n", __func__);
return -ENODEV;
}
@@ -325,13 +311,14 @@ static int i82875p_probe1(struct pci_dev *pdev, int dev_idx)
goto fail0;
#endif
}
+
/* cache is irrelevant for PCI bus reads/writes */
ovrfl_window = ioremap_nocache(pci_resource_start(ovrfl_pdev, 0),
- pci_resource_len(ovrfl_pdev, 0));
+ pci_resource_len(ovrfl_pdev, 0));
if (!ovrfl_window) {
i82875p_printk(KERN_ERR, "%s(): Failed to ioremap bar6\n",
- __func__);
+ __func__);
goto fail1;
}
@@ -339,10 +326,10 @@ static int i82875p_probe1(struct pci_dev *pdev, int dev_idx)
drc = readl(ovrfl_window + I82875P_DRC);
drc_chan = ((drc >> 21) & 0x1);
nr_chans = drc_chan + 1;
- drc_ddim = (drc >> 18) & 0x1;
+ drc_ddim = (drc >> 18) & 0x1;
mci = edac_mc_alloc(sizeof(*pvt), I82875P_NR_CSROWS(nr_chans),
- nr_chans);
+ nr_chans);
if (!mci) {
rc = -ENOMEM;
@@ -350,10 +337,8 @@ static int i82875p_probe1(struct pci_dev *pdev, int dev_idx)
}
debugf3("%s(): init mci\n", __func__);
-
mci->pdev = pdev;
mci->mtype_cap = MEM_FLAG_DDR;
-
mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED;
mci->edac_cap = EDAC_FLAG_UNKNOWN;
/* adjust FLAGS */
@@ -363,9 +348,7 @@ static int i82875p_probe1(struct pci_dev *pdev, int dev_idx)
mci->ctl_name = i82875p_devs[dev_idx].ctl_name;
mci->edac_check = i82875p_check;
mci->ctl_page_to_phys = NULL;
-
debugf3("%s(): init pvt\n", __func__);
-
pvt = (struct i82875p_pvt *) mci->pvt_info;
pvt->ovrfl_pdev = ovrfl_pdev;
pvt->ovrfl_window = ovrfl_window;
@@ -385,6 +368,7 @@ static int i82875p_probe1(struct pci_dev *pdev, int dev_idx)
cumul_size = value << (I82875P_DRB_SHIFT - PAGE_SHIFT);
debugf3("%s(): (%d) cumul_size 0x%x\n", __func__, index,
cumul_size);
+
if (cumul_size == last_cumul_size)
continue; /* not populated */
@@ -392,7 +376,7 @@ static int i82875p_probe1(struct pci_dev *pdev, int dev_idx)
csrow->last_page = cumul_size - 1;
csrow->nr_pages = cumul_size - last_cumul_size;
last_cumul_size = cumul_size;
- csrow->grain = 1 << 12; /* I82875P_EAP has 4KiB reolution */
+ csrow->grain = 1 << 12; /* I82875P_EAP has 4KiB reolution */
csrow->mtype = MEM_DDR;
csrow->dtype = DEV_UNKNOWN;
csrow->edac_mode = drc_ddim ? EDAC_SECDED : EDAC_NONE;
@@ -426,25 +410,26 @@ fail0:
return rc;
}
-
/* returns count (>= 0), or negative on error */
static int __devinit i82875p_init_one(struct pci_dev *pdev,
- const struct pci_device_id *ent)
+ const struct pci_device_id *ent)
{
int rc;
debugf0("%s()\n", __func__);
-
i82875p_printk(KERN_INFO, "i82875p init one\n");
- if(pci_enable_device(pdev) < 0)
+
+ if (pci_enable_device(pdev) < 0)
return -EIO;
+
rc = i82875p_probe1(pdev, ent->driver_data);
+
if (mci_pdev == NULL)
mci_pdev = pci_dev_get(pdev);
+
return rc;
}
-
static void __devexit i82875p_remove_one(struct pci_dev *pdev)
{
struct mem_ctl_info *mci;
@@ -456,6 +441,7 @@ static void __devexit i82875p_remove_one(struct pci_dev *pdev)
return;
pvt = (struct i82875p_pvt *) mci->pvt_info;
+
if (pvt->ovrfl_window)
iounmap(pvt->ovrfl_window);
@@ -470,16 +456,18 @@ static void __devexit i82875p_remove_one(struct pci_dev *pdev)
edac_mc_free(mci);
}
-
static const struct pci_device_id i82875p_pci_tbl[] __devinitdata = {
- {PCI_VEND_DEV(INTEL, 82875_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- I82875P},
- {0,} /* 0 terminated list. */
+ {
+ PCI_VEND_DEV(INTEL, 82875_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ I82875P
+ },
+ {
+ 0,
+ } /* 0 terminated list. */
};
MODULE_DEVICE_TABLE(pci, i82875p_pci_tbl);
-
static struct pci_driver i82875p_driver = {
.name = EDAC_MOD_STR,
.probe = i82875p_init_one,
@@ -487,31 +475,35 @@ static struct pci_driver i82875p_driver = {
.id_table = i82875p_pci_tbl,
};
-
static int __init i82875p_init(void)
{
int pci_rc;
debugf3("%s()\n", __func__);
pci_rc = pci_register_driver(&i82875p_driver);
+
if (pci_rc < 0)
goto fail0;
+
if (mci_pdev == NULL) {
- mci_pdev =
- pci_get_device(PCI_VENDOR_ID_INTEL,
- PCI_DEVICE_ID_INTEL_82875_0, NULL);
+ mci_pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
+ PCI_DEVICE_ID_INTEL_82875_0, NULL);
+
if (!mci_pdev) {
debugf0("875p pci_get_device fail\n");
pci_rc = -ENODEV;
goto fail1;
}
+
pci_rc = i82875p_init_one(mci_pdev, i82875p_pci_tbl);
+
if (pci_rc < 0) {
debugf0("875p init fail\n");
pci_rc = -ENODEV;
goto fail1;
}
}
+
return 0;
fail1:
@@ -524,23 +516,21 @@ fail0:
return pci_rc;
}
-
static void __exit i82875p_exit(void)
{
debugf3("%s()\n", __func__);
pci_unregister_driver(&i82875p_driver);
+
if (!i82875p_registered) {
i82875p_remove_one(mci_pdev);
pci_dev_put(mci_pdev);
}
}
-
module_init(i82875p_init);
module_exit(i82875p_exit);
-
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Linux Networx (http://lnxi.com) Thayne Harbaugh");
MODULE_DESCRIPTION("MC support for Intel 82875 memory hub controllers");
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-23 06:46:54 +0000