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path: root/drivers/edac/i82975x_edac.c
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Diffstat (limited to 'drivers/edac/i82975x_edac.c')
-rw-r--r--drivers/edac/i82975x_edac.c172
1 files changed, 107 insertions, 65 deletions
diff --git a/drivers/edac/i82975x_edac.c b/drivers/edac/i82975x_edac.c
index 2eed3ea2cf6..10b10521f62 100644
--- a/drivers/edac/i82975x_edac.c
+++ b/drivers/edac/i82975x_edac.c
@@ -13,11 +13,10 @@
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
-#include <linux/slab.h>
#include <linux/edac.h>
#include "edac_core.h"
-#define I82975X_REVISION " Ver: 1.0.0 " __DATE__
+#define I82975X_REVISION " Ver: 1.0.0"
#define EDAC_MOD_STR "i82975x_edac"
#define i82975x_printk(level, fmt, arg...) \
@@ -30,7 +29,8 @@
#define PCI_DEVICE_ID_INTEL_82975_0 0x277c
#endif /* PCI_DEVICE_ID_INTEL_82975_0 */
-#define I82975X_NR_CSROWS(nr_chans) (8/(nr_chans))
+#define I82975X_NR_DIMMS 8
+#define I82975X_NR_CSROWS(nr_chans) (I82975X_NR_DIMMS / (nr_chans))
/* Intel 82975X register addresses - device 0 function 0 - DRAM Controller */
#define I82975X_EAP 0x58 /* Dram Error Address Pointer (32b)
@@ -161,8 +161,8 @@ NOTE: Only ONE of the three must be enabled
* 3:2 Rank 1 architecture
* 1:0 Rank 0 architecture
*
- * 00 => x16 devices; i.e 4 banks
- * 01 => x8 devices; i.e 8 banks
+ * 00 => 4 banks
+ * 01 => 8 banks
*/
#define I82975X_C0BNKARC 0x10e
#define I82975X_C1BNKARC 0x18e
@@ -241,7 +241,7 @@ static void i82975x_get_error_info(struct mem_ctl_info *mci,
{
struct pci_dev *pdev;
- pdev = to_pci_dev(mci->dev);
+ pdev = to_pci_dev(mci->pdev);
/*
* This is a mess because there is no atomic way to read all the
@@ -278,9 +278,8 @@ static void i82975x_get_error_info(struct mem_ctl_info *mci,
static int i82975x_process_error_info(struct mem_ctl_info *mci,
struct i82975x_error_info *info, int handle_errors)
{
- int row, multi_chan, chan;
-
- multi_chan = mci->csrows[0].nr_channels - 1;
+ int row, chan;
+ unsigned long offst, page;
if (!(info->errsts2 & 0x0003))
return 0;
@@ -289,23 +288,41 @@ static int i82975x_process_error_info(struct mem_ctl_info *mci,
return 1;
if ((info->errsts ^ info->errsts2) & 0x0003) {
- edac_mc_handle_ce_no_info(mci, "UE overwrote CE");
+ edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 0, 0, 0,
+ -1, -1, -1, "UE overwrote CE", "");
info->errsts = info->errsts2;
}
- chan = info->eap & 1;
- info->eap >>= 1;
- if (info->xeap )
- info->eap |= 0x80000000;
- info->eap >>= PAGE_SHIFT;
- row = edac_mc_find_csrow_by_page(mci, info->eap);
+ page = (unsigned long) info->eap;
+ page >>= 1;
+ if (info->xeap & 1)
+ page |= 0x80000000;
+ page >>= (PAGE_SHIFT - 1);
+ row = edac_mc_find_csrow_by_page(mci, page);
+
+ if (row == -1) {
+ i82975x_mc_printk(mci, KERN_ERR, "error processing EAP:\n"
+ "\tXEAP=%u\n"
+ "\t EAP=0x%08x\n"
+ "\tPAGE=0x%08x\n",
+ (info->xeap & 1) ? 1 : 0, info->eap, (unsigned int) page);
+ return 0;
+ }
+ chan = (mci->csrows[row]->nr_channels == 1) ? 0 : info->eap & 1;
+ offst = info->eap
+ & ((1 << PAGE_SHIFT) -
+ (1 << mci->csrows[row]->channels[chan]->dimm->grain));
if (info->errsts & 0x0002)
- edac_mc_handle_ue(mci, info->eap, 0, row, "i82975x UE");
+ edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1,
+ page, offst, 0,
+ row, -1, -1,
+ "i82975x UE", "");
else
- edac_mc_handle_ce(mci, info->eap, 0, info->derrsyn, row,
- multi_chan ? chan : 0,
- "i82975x CE");
+ edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1,
+ page, offst, info->derrsyn,
+ row, chan ? chan : 0, -1,
+ "i82975x CE", "");
return 1;
}
@@ -314,7 +331,7 @@ static void i82975x_check(struct mem_ctl_info *mci)
{
struct i82975x_error_info info;
- debugf1("MC%d: %s()\n", mci->mc_idx, __func__);
+ edac_dbg(1, "MC%d\n", mci->mc_idx);
i82975x_get_error_info(mci, &info);
i82975x_process_error_info(mci, &info, 1);
}
@@ -345,11 +362,7 @@ static int dual_channel_active(void __iomem *mch_window)
static enum dev_type i82975x_dram_type(void __iomem *mch_window, int rank)
{
/*
- * ASUS P5W DH either does not program this register or programs
- * it wrong!
- * ECC is possible on i92975x ONLY with DEV_X8 which should mean 'val'
- * for each rank should be 01b - the LSB of the word should be 0x55;
- * but it reads 0!
+ * ECC is possible on i92975x ONLY with DEV_X8
*/
return DEV_X8;
}
@@ -360,8 +373,10 @@ static void i82975x_init_csrows(struct mem_ctl_info *mci,
struct csrow_info *csrow;
unsigned long last_cumul_size;
u8 value;
- u32 cumul_size;
- int index;
+ u32 cumul_size, nr_pages;
+ int index, chan;
+ struct dimm_info *dimm;
+ enum dev_type dtype;
last_cumul_size = 0;
@@ -370,34 +385,53 @@ static void i82975x_init_csrows(struct mem_ctl_info *mci,
* The dram row boundary (DRB) reg values are boundary address
* for each DRAM row with a granularity of 32 or 64MB (single/dual
* channel operation). DRB regs are cumulative; therefore DRB7 will
- * contain the total memory contained in all eight rows.
- *
- * FIXME:
- * EDAC currently works for Dual-channel Interleaved configuration.
- * Other configurations, which the chip supports, need fixing/testing.
+ * contain the total memory contained in all rows.
*
*/
for (index = 0; index < mci->nr_csrows; index++) {
- csrow = &mci->csrows[index];
+ csrow = mci->csrows[index];
value = readb(mch_window + I82975X_DRB + index +
((index >= 4) ? 0x80 : 0));
cumul_size = value;
cumul_size <<= (I82975X_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 */
+ /*
+ * Adjust cumul_size w.r.t number of channels
+ *
+ */
+ if (csrow->nr_channels > 1)
+ cumul_size <<= 1;
+ edac_dbg(3, "(%d) cumul_size 0x%x\n", index, cumul_size);
+
+ nr_pages = cumul_size - last_cumul_size;
+ if (!nr_pages)
+ continue;
+
+ /*
+ * Initialise dram labels
+ * index values:
+ * [0-7] for single-channel; i.e. csrow->nr_channels = 1
+ * [0-3] for dual-channel; i.e. csrow->nr_channels = 2
+ */
+ dtype = i82975x_dram_type(mch_window, index);
+ for (chan = 0; chan < csrow->nr_channels; chan++) {
+ dimm = mci->csrows[index]->channels[chan]->dimm;
+
+ dimm->nr_pages = nr_pages / csrow->nr_channels;
+
+ snprintf(csrow->channels[chan]->dimm->label, EDAC_MC_LABEL_LEN, "DIMM %c%d",
+ (chan == 0) ? 'A' : 'B',
+ index);
+ dimm->grain = 1 << 7; /* 128Byte cache-line resolution */
+ dimm->dtype = i82975x_dram_type(mch_window, index);
+ dimm->mtype = MEM_DDR2; /* I82975x supports only DDR2 */
+ dimm->edac_mode = EDAC_SECDED; /* only supported */
+ }
csrow->first_page = last_cumul_size;
csrow->last_page = cumul_size - 1;
- csrow->nr_pages = cumul_size - last_cumul_size;
last_cumul_size = cumul_size;
- csrow->grain = 1 << 7; /* I82975X_EAP has 128B resolution */
- csrow->mtype = MEM_DDR; /* i82975x supports only DDR2 */
- csrow->dtype = i82975x_dram_type(mch_window, index);
- csrow->edac_mode = EDAC_SECDED; /* only supported */
}
}
@@ -439,6 +473,7 @@ static int i82975x_probe1(struct pci_dev *pdev, int dev_idx)
{
int rc = -ENODEV;
struct mem_ctl_info *mci;
+ struct edac_mc_layer layers[2];
struct i82975x_pvt *pvt;
void __iomem *mch_window;
u32 mchbar;
@@ -450,11 +485,11 @@ static int i82975x_probe1(struct pci_dev *pdev, int dev_idx)
u8 c1drb[4];
#endif
- debugf0("%s()\n", __func__);
+ edac_dbg(0, "\n");
pci_read_config_dword(pdev, I82975X_MCHBAR, &mchbar);
if (!(mchbar & 1)) {
- debugf3("%s(): failed, MCHBAR disabled!\n", __func__);
+ edac_dbg(3, "failed, MCHBAR disabled!\n");
goto fail0;
}
mchbar &= 0xffffc000; /* bits 31:14 used for 16K window */
@@ -507,37 +542,44 @@ static int i82975x_probe1(struct pci_dev *pdev, int dev_idx)
chans = dual_channel_active(mch_window) + 1;
/* assuming only one controller, index thus is 0 */
- mci = edac_mc_alloc(sizeof(*pvt), I82975X_NR_CSROWS(chans),
- chans, 0);
+ layers[0].type = EDAC_MC_LAYER_CHIP_SELECT;
+ layers[0].size = I82975X_NR_DIMMS;
+ layers[0].is_virt_csrow = true;
+ layers[1].type = EDAC_MC_LAYER_CHANNEL;
+ layers[1].size = I82975X_NR_CSROWS(chans);
+ layers[1].is_virt_csrow = false;
+ mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, sizeof(*pvt));
if (!mci) {
rc = -ENOMEM;
goto fail1;
}
- debugf3("%s(): init mci\n", __func__);
- mci->dev = &pdev->dev;
- mci->mtype_cap = MEM_FLAG_DDR;
+ edac_dbg(3, "init mci\n");
+ mci->pdev = &pdev->dev;
+ mci->mtype_cap = MEM_FLAG_DDR2;
mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED;
mci->edac_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED;
mci->mod_name = EDAC_MOD_STR;
mci->mod_ver = I82975X_REVISION;
mci->ctl_name = i82975x_devs[dev_idx].ctl_name;
+ mci->dev_name = pci_name(pdev);
mci->edac_check = i82975x_check;
mci->ctl_page_to_phys = NULL;
- debugf3("%s(): init pvt\n", __func__);
+ edac_dbg(3, "init pvt\n");
pvt = (struct i82975x_pvt *) mci->pvt_info;
pvt->mch_window = mch_window;
i82975x_init_csrows(mci, pdev, mch_window);
+ mci->scrub_mode = SCRUB_HW_SRC;
i82975x_get_error_info(mci, &discard); /* clear counters */
/* finalize this instance of memory controller with edac core */
if (edac_mc_add_mc(mci)) {
- debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
+ edac_dbg(3, "failed edac_mc_add_mc()\n");
goto fail2;
}
/* get this far and it's successful */
- debugf3("%s(): success\n", __func__);
+ edac_dbg(3, "success\n");
return 0;
fail2:
@@ -550,12 +592,12 @@ fail0:
}
/* returns count (>= 0), or negative on error */
-static int __devinit i82975x_init_one(struct pci_dev *pdev,
- const struct pci_device_id *ent)
+static int i82975x_init_one(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
{
int rc;
- debugf0("%s()\n", __func__);
+ edac_dbg(0, "\n");
if (pci_enable_device(pdev) < 0)
return -EIO;
@@ -568,12 +610,12 @@ static int __devinit i82975x_init_one(struct pci_dev *pdev,
return rc;
}
-static void __devexit i82975x_remove_one(struct pci_dev *pdev)
+static void i82975x_remove_one(struct pci_dev *pdev)
{
struct mem_ctl_info *mci;
struct i82975x_pvt *pvt;
- debugf0("%s()\n", __func__);
+ edac_dbg(0, "\n");
mci = edac_mc_del_mc(&pdev->dev);
if (mci == NULL)
@@ -586,7 +628,7 @@ static void __devexit i82975x_remove_one(struct pci_dev *pdev)
edac_mc_free(mci);
}
-static const struct pci_device_id i82975x_pci_tbl[] __devinitdata = {
+static const struct pci_device_id i82975x_pci_tbl[] = {
{
PCI_VEND_DEV(INTEL, 82975_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
I82975X
@@ -601,7 +643,7 @@ MODULE_DEVICE_TABLE(pci, i82975x_pci_tbl);
static struct pci_driver i82975x_driver = {
.name = EDAC_MOD_STR,
.probe = i82975x_init_one,
- .remove = __devexit_p(i82975x_remove_one),
+ .remove = i82975x_remove_one,
.id_table = i82975x_pci_tbl,
};
@@ -609,7 +651,7 @@ static int __init i82975x_init(void)
{
int pci_rc;
- debugf3("%s()\n", __func__);
+ edac_dbg(3, "\n");
/* Ensure that the OPSTATE is set correctly for POLL or NMI */
opstate_init();
@@ -623,7 +665,7 @@ static int __init i82975x_init(void)
PCI_DEVICE_ID_INTEL_82975_0, NULL);
if (!mci_pdev) {
- debugf0("i82975x pci_get_device fail\n");
+ edac_dbg(0, "i82975x pci_get_device fail\n");
pci_rc = -ENODEV;
goto fail1;
}
@@ -631,7 +673,7 @@ static int __init i82975x_init(void)
pci_rc = i82975x_init_one(mci_pdev, i82975x_pci_tbl);
if (pci_rc < 0) {
- debugf0("i82975x init fail\n");
+ edac_dbg(0, "i82975x init fail\n");
pci_rc = -ENODEV;
goto fail1;
}
@@ -651,7 +693,7 @@ fail0:
static void __exit i82975x_exit(void)
{
- debugf3("%s()\n", __func__);
+ edac_dbg(3, "\n");
pci_unregister_driver(&i82975x_driver);
@@ -665,7 +707,7 @@ module_init(i82975x_init);
module_exit(i82975x_exit);
MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Arvind R. <arvind@acarlab.com>");
+MODULE_AUTHOR("Arvind R. <arvino55@gmail.com>");
MODULE_DESCRIPTION("MC support for Intel 82975 memory hub controllers");
module_param(edac_op_state, int, 0444);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-10 02:55:32 +0000