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linux/drivers/edac/mpc85xx_edac.c
Ira W. Snyder b484625172 edac: mpc85xx add mpc83xx support 
Add support for the Freescale MPC83xx memory controller to the existing
driver for the Freescale MPC85xx memory controller.  The only difference
between the two processors are in the CS_BNDS register parsing code, which
has been changed so it will work on both processors.

The L2 cache controller does not exist on the MPC83xx, but the OF
subsystem will not use the driver if the device is not present in the OF
device tree.

I had to change the nr_pages calculation to make the math work out.  I
checked it on my board and did the math by hand for a 64GB 85xx using 64K
pages.  In both cases, nr_pages * PAGE_SIZE comes out to the correct
value.

Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Doug Thompson <dougthompson@xmission.com>
Cc: Kumar Gala <galak@gate.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-24 07:21:04 -07:00

1087 lines
29 KiB
C
Raw Blame History

/*
* Freescale MPC85xx Memory Controller kenel module
*
* Author: Dave Jiang <djiang@mvista.com>
*
* 2006-2007 (c) MontaVista Software, Inc. This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/ctype.h>
#include <linux/io.h>
#include <linux/mod_devicetable.h>
#include <linux/edac.h>
#include <linux/smp.h>
#include <linux/of_platform.h>
#include <linux/of_device.h>
#include "edac_module.h"
#include "edac_core.h"
#include "mpc85xx_edac.h"
static int edac_dev_idx;
static int edac_pci_idx;
static int edac_mc_idx;
static u32 orig_ddr_err_disable;
static u32 orig_ddr_err_sbe;
/*
* PCI Err defines
*/
#ifdef CONFIG_PCI
static u32 orig_pci_err_cap_dr;
static u32 orig_pci_err_en;
#endif
static u32 orig_l2_err_disable;
#ifdef CONFIG_MPC85xx
static u32 orig_hid1[2];
#endif
/************************ MC SYSFS parts ***********************************/
static ssize_t mpc85xx_mc_inject_data_hi_show(struct mem_ctl_info *mci,
char *data)
{
struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
return sprintf(data, "0x%08x",
in_be32(pdata->mc_vbase +
MPC85XX_MC_DATA_ERR_INJECT_HI));
}
static ssize_t mpc85xx_mc_inject_data_lo_show(struct mem_ctl_info *mci,
char *data)
{
struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
return sprintf(data, "0x%08x",
in_be32(pdata->mc_vbase +
MPC85XX_MC_DATA_ERR_INJECT_LO));
}
static ssize_t mpc85xx_mc_inject_ctrl_show(struct mem_ctl_info *mci, char *data)
{
struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
return sprintf(data, "0x%08x",
in_be32(pdata->mc_vbase + MPC85XX_MC_ECC_ERR_INJECT));
}
static ssize_t mpc85xx_mc_inject_data_hi_store(struct mem_ctl_info *mci,
const char *data, size_t count)
{
struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
if (isdigit(*data)) {
out_be32(pdata->mc_vbase + MPC85XX_MC_DATA_ERR_INJECT_HI,
simple_strtoul(data, NULL, 0));
return count;
}
return 0;
}
static ssize_t mpc85xx_mc_inject_data_lo_store(struct mem_ctl_info *mci,
const char *data, size_t count)
{
struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
if (isdigit(*data)) {
out_be32(pdata->mc_vbase + MPC85XX_MC_DATA_ERR_INJECT_LO,
simple_strtoul(data, NULL, 0));
return count;
}
return 0;
}
static ssize_t mpc85xx_mc_inject_ctrl_store(struct mem_ctl_info *mci,
const char *data, size_t count)
{
struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
if (isdigit(*data)) {
out_be32(pdata->mc_vbase + MPC85XX_MC_ECC_ERR_INJECT,
simple_strtoul(data, NULL, 0));
return count;
}
return 0;
}
static struct mcidev_sysfs_attribute mpc85xx_mc_sysfs_attributes[] = {
{
.attr = {
.name = "inject_data_hi",
.mode = (S_IRUGO | S_IWUSR)
},
.show = mpc85xx_mc_inject_data_hi_show,
.store = mpc85xx_mc_inject_data_hi_store},
{
.attr = {
.name = "inject_data_lo",
.mode = (S_IRUGO | S_IWUSR)
},
.show = mpc85xx_mc_inject_data_lo_show,
.store = mpc85xx_mc_inject_data_lo_store},
{
.attr = {
.name = "inject_ctrl",
.mode = (S_IRUGO | S_IWUSR)
},
.show = mpc85xx_mc_inject_ctrl_show,
.store = mpc85xx_mc_inject_ctrl_store},
/* End of list */
{
.attr = {.name = NULL}
}
};
static void mpc85xx_set_mc_sysfs_attributes(struct mem_ctl_info *mci)
{
mci->mc_driver_sysfs_attributes = mpc85xx_mc_sysfs_attributes;
}
/**************************** PCI Err device ***************************/
#ifdef CONFIG_PCI
static void mpc85xx_pci_check(struct edac_pci_ctl_info *pci)
{
struct mpc85xx_pci_pdata *pdata = pci->pvt_info;
u32 err_detect;
err_detect = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR);
/* master aborts can happen during PCI config cycles */
if (!(err_detect & ~(PCI_EDE_MULTI_ERR | PCI_EDE_MST_ABRT))) {
out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, err_detect);
return;
}
printk(KERN_ERR "PCI error(s) detected\n");
printk(KERN_ERR "PCI/X ERR_DR register: %#08x\n", err_detect);
printk(KERN_ERR "PCI/X ERR_ATTRIB register: %#08x\n",
in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_ATTRIB));
printk(KERN_ERR "PCI/X ERR_ADDR register: %#08x\n",
in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_ADDR));
printk(KERN_ERR "PCI/X ERR_EXT_ADDR register: %#08x\n",
in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EXT_ADDR));
printk(KERN_ERR "PCI/X ERR_DL register: %#08x\n",
in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DL));
printk(KERN_ERR "PCI/X ERR_DH register: %#08x\n",
in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DH));
/* clear error bits */
out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, err_detect);
if (err_detect & PCI_EDE_PERR_MASK)
edac_pci_handle_pe(pci, pci->ctl_name);
if ((err_detect & ~PCI_EDE_MULTI_ERR) & ~PCI_EDE_PERR_MASK)
edac_pci_handle_npe(pci, pci->ctl_name);
}
static irqreturn_t mpc85xx_pci_isr(int irq, void *dev_id)
{
struct edac_pci_ctl_info *pci = dev_id;
struct mpc85xx_pci_pdata *pdata = pci->pvt_info;
u32 err_detect;
err_detect = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR);
if (!err_detect)
return IRQ_NONE;
mpc85xx_pci_check(pci);
return IRQ_HANDLED;
}
static int __devinit mpc85xx_pci_err_probe(struct of_device *op,
const struct of_device_id *match)
{
struct edac_pci_ctl_info *pci;
struct mpc85xx_pci_pdata *pdata;
struct resource r;
int res = 0;
if (!devres_open_group(&op->dev, mpc85xx_pci_err_probe, GFP_KERNEL))
return -ENOMEM;
pci = edac_pci_alloc_ctl_info(sizeof(*pdata), "mpc85xx_pci_err");
if (!pci)
return -ENOMEM;
pdata = pci->pvt_info;
pdata->name = "mpc85xx_pci_err";
pdata->irq = NO_IRQ;
dev_set_drvdata(&op->dev, pci);
pci->dev = &op->dev;
pci->mod_name = EDAC_MOD_STR;
pci->ctl_name = pdata->name;
pci->dev_name = dev_name(&op->dev);
if (edac_op_state == EDAC_OPSTATE_POLL)
pci->edac_check = mpc85xx_pci_check;
pdata->edac_idx = edac_pci_idx++;
res = of_address_to_resource(op->node, 0, &r);
if (res) {
printk(KERN_ERR "%s: Unable to get resource for "
"PCI err regs\n", __func__);
goto err;
}
/* we only need the error registers */
r.start += 0xe00;
if (!devm_request_mem_region(&op->dev, r.start,
r.end - r.start + 1, pdata->name)) {
printk(KERN_ERR "%s: Error while requesting mem region\n",
__func__);
res = -EBUSY;
goto err;
}
pdata->pci_vbase = devm_ioremap(&op->dev, r.start,
r.end - r.start + 1);
if (!pdata->pci_vbase) {
printk(KERN_ERR "%s: Unable to setup PCI err regs\n", __func__);
res = -ENOMEM;
goto err;
}
orig_pci_err_cap_dr =
in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_CAP_DR);
/* PCI master abort is expected during config cycles */
out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_CAP_DR, 0x40);
orig_pci_err_en = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN);
/* disable master abort reporting */
out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN, ~0x40);
/* clear error bits */
out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, ~0);
if (edac_pci_add_device(pci, pdata->edac_idx) > 0) {
debugf3("%s(): failed edac_pci_add_device()\n", __func__);
goto err;
}
if (edac_op_state == EDAC_OPSTATE_INT) {
pdata->irq = irq_of_parse_and_map(op->node, 0);
res = devm_request_irq(&op->dev, pdata->irq,
mpc85xx_pci_isr, IRQF_DISABLED,
"[EDAC] PCI err", pci);
if (res < 0) {
printk(KERN_ERR
"%s: Unable to requiest irq %d for "
"MPC85xx PCI err\n", __func__, pdata->irq);
irq_dispose_mapping(pdata->irq);
res = -ENODEV;
goto err2;
}
printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for PCI Err\n",
pdata->irq);
}
devres_remove_group(&op->dev, mpc85xx_pci_err_probe);
debugf3("%s(): success\n", __func__);
printk(KERN_INFO EDAC_MOD_STR " PCI err registered\n");
return 0;
err2:
edac_pci_del_device(&op->dev);
err:
edac_pci_free_ctl_info(pci);
devres_release_group(&op->dev, mpc85xx_pci_err_probe);
return res;
}
static int mpc85xx_pci_err_remove(struct of_device *op)
{
struct edac_pci_ctl_info *pci = dev_get_drvdata(&op->dev);
struct mpc85xx_pci_pdata *pdata = pci->pvt_info;
debugf0("%s()\n", __func__);
out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_CAP_DR,
orig_pci_err_cap_dr);
out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN, orig_pci_err_en);
edac_pci_del_device(pci->dev);
if (edac_op_state == EDAC_OPSTATE_INT)
irq_dispose_mapping(pdata->irq);
edac_pci_free_ctl_info(pci);
return 0;
}
static struct of_device_id mpc85xx_pci_err_of_match[] = {
{
.compatible = "fsl,mpc8540-pcix",
},
{
.compatible = "fsl,mpc8540-pci",
},
{},
};
static struct of_platform_driver mpc85xx_pci_err_driver = {
.owner = THIS_MODULE,
.name = "mpc85xx_pci_err",
.match_table = mpc85xx_pci_err_of_match,
.probe = mpc85xx_pci_err_probe,
.remove = __devexit_p(mpc85xx_pci_err_remove),
.driver = {
.name = "mpc85xx_pci_err",
.owner = THIS_MODULE,
},
};
#endif /* CONFIG_PCI */
/**************************** L2 Err device ***************************/
/************************ L2 SYSFS parts ***********************************/
static ssize_t mpc85xx_l2_inject_data_hi_show(struct edac_device_ctl_info
*edac_dev, char *data)
{
struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
return sprintf(data, "0x%08x",
in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJHI));
}
static ssize_t mpc85xx_l2_inject_data_lo_show(struct edac_device_ctl_info
*edac_dev, char *data)
{
struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
return sprintf(data, "0x%08x",
in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJLO));
}
static ssize_t mpc85xx_l2_inject_ctrl_show(struct edac_device_ctl_info
*edac_dev, char *data)
{
struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
return sprintf(data, "0x%08x",
in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJCTL));
}
static ssize_t mpc85xx_l2_inject_data_hi_store(struct edac_device_ctl_info
*edac_dev, const char *data,
size_t count)
{
struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
if (isdigit(*data)) {
out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJHI,
simple_strtoul(data, NULL, 0));
return count;
}
return 0;
}
static ssize_t mpc85xx_l2_inject_data_lo_store(struct edac_device_ctl_info
*edac_dev, const char *data,
size_t count)
{
struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
if (isdigit(*data)) {
out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJLO,
simple_strtoul(data, NULL, 0));
return count;
}
return 0;
}
static ssize_t mpc85xx_l2_inject_ctrl_store(struct edac_device_ctl_info
*edac_dev, const char *data,
size_t count)
{
struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
if (isdigit(*data)) {
out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJCTL,
simple_strtoul(data, NULL, 0));
return count;
}
return 0;
}
static struct edac_dev_sysfs_attribute mpc85xx_l2_sysfs_attributes[] = {
{
.attr = {
.name = "inject_data_hi",
.mode = (S_IRUGO | S_IWUSR)
},
.show = mpc85xx_l2_inject_data_hi_show,
.store = mpc85xx_l2_inject_data_hi_store},
{
.attr = {
.name = "inject_data_lo",
.mode = (S_IRUGO | S_IWUSR)
},
.show = mpc85xx_l2_inject_data_lo_show,
.store = mpc85xx_l2_inject_data_lo_store},
{
.attr = {
.name = "inject_ctrl",
.mode = (S_IRUGO | S_IWUSR)
},
.show = mpc85xx_l2_inject_ctrl_show,
.store = mpc85xx_l2_inject_ctrl_store},
/* End of list */
{
.attr = {.name = NULL}
}
};
static void mpc85xx_set_l2_sysfs_attributes(struct edac_device_ctl_info
*edac_dev)
{
edac_dev->sysfs_attributes = mpc85xx_l2_sysfs_attributes;
}
/***************************** L2 ops ***********************************/
static void mpc85xx_l2_check(struct edac_device_ctl_info *edac_dev)
{
struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
u32 err_detect;
err_detect = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET);
if (!(err_detect & L2_EDE_MASK))
return;
printk(KERN_ERR "ECC Error in CPU L2 cache\n");
printk(KERN_ERR "L2 Error Detect Register: 0x%08x\n", err_detect);
printk(KERN_ERR "L2 Error Capture Data High Register: 0x%08x\n",
in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTDATAHI));
printk(KERN_ERR "L2 Error Capture Data Lo Register: 0x%08x\n",
in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTDATALO));
printk(KERN_ERR "L2 Error Syndrome Register: 0x%08x\n",
in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTECC));
printk(KERN_ERR "L2 Error Attributes Capture Register: 0x%08x\n",
in_be32(pdata->l2_vbase + MPC85XX_L2_ERRATTR));
printk(KERN_ERR "L2 Error Address Capture Register: 0x%08x\n",
in_be32(pdata->l2_vbase + MPC85XX_L2_ERRADDR));
/* clear error detect register */
out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET, err_detect);
if (err_detect & L2_EDE_CE_MASK)
edac_device_handle_ce(edac_dev, 0, 0, edac_dev->ctl_name);
if (err_detect & L2_EDE_UE_MASK)
edac_device_handle_ue(edac_dev, 0, 0, edac_dev->ctl_name);
}
static irqreturn_t mpc85xx_l2_isr(int irq, void *dev_id)
{
struct edac_device_ctl_info *edac_dev = dev_id;
struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
u32 err_detect;
err_detect = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET);
if (!(err_detect & L2_EDE_MASK))
return IRQ_NONE;
mpc85xx_l2_check(edac_dev);
return IRQ_HANDLED;
}
static int __devinit mpc85xx_l2_err_probe(struct of_device *op,
const struct of_device_id *match)
{
struct edac_device_ctl_info *edac_dev;
struct mpc85xx_l2_pdata *pdata;
struct resource r;
int res;
if (!devres_open_group(&op->dev, mpc85xx_l2_err_probe, GFP_KERNEL))
return -ENOMEM;
edac_dev = edac_device_alloc_ctl_info(sizeof(*pdata),
"cpu", 1, "L", 1, 2, NULL, 0,
edac_dev_idx);
if (!edac_dev) {
devres_release_group(&op->dev, mpc85xx_l2_err_probe);
return -ENOMEM;
}
pdata = edac_dev->pvt_info;
pdata->name = "mpc85xx_l2_err";
pdata->irq = NO_IRQ;
edac_dev->dev = &op->dev;
dev_set_drvdata(edac_dev->dev, edac_dev);
edac_dev->ctl_name = pdata->name;
edac_dev->dev_name = pdata->name;
res = of_address_to_resource(op->node, 0, &r);
if (res) {
printk(KERN_ERR "%s: Unable to get resource for "
"L2 err regs\n", __func__);
goto err;
}
/* we only need the error registers */
r.start += 0xe00;
if (!devm_request_mem_region(&op->dev, r.start,
r.end - r.start + 1, pdata->name)) {
printk(KERN_ERR "%s: Error while requesting mem region\n",
__func__);
res = -EBUSY;
goto err;
}
pdata->l2_vbase = devm_ioremap(&op->dev, r.start, r.end - r.start + 1);
if (!pdata->l2_vbase) {
printk(KERN_ERR "%s: Unable to setup L2 err regs\n", __func__);
res = -ENOMEM;
goto err;
}
out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET, ~0);
orig_l2_err_disable = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS);
/* clear the err_dis */
out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS, 0);
edac_dev->mod_name = EDAC_MOD_STR;
if (edac_op_state == EDAC_OPSTATE_POLL)
edac_dev->edac_check = mpc85xx_l2_check;
mpc85xx_set_l2_sysfs_attributes(edac_dev);
pdata->edac_idx = edac_dev_idx++;
if (edac_device_add_device(edac_dev) > 0) {
debugf3("%s(): failed edac_device_add_device()\n", __func__);
goto err;
}
if (edac_op_state == EDAC_OPSTATE_INT) {
pdata->irq = irq_of_parse_and_map(op->node, 0);
res = devm_request_irq(&op->dev, pdata->irq,
mpc85xx_l2_isr, IRQF_DISABLED,
"[EDAC] L2 err", edac_dev);
if (res < 0) {
printk(KERN_ERR
"%s: Unable to requiest irq %d for "
"MPC85xx L2 err\n", __func__, pdata->irq);
irq_dispose_mapping(pdata->irq);
res = -ENODEV;
goto err2;
}
printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for L2 Err\n",
pdata->irq);
edac_dev->op_state = OP_RUNNING_INTERRUPT;
out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINTEN, L2_EIE_MASK);
}
devres_remove_group(&op->dev, mpc85xx_l2_err_probe);
debugf3("%s(): success\n", __func__);
printk(KERN_INFO EDAC_MOD_STR " L2 err registered\n");
return 0;
err2:
edac_device_del_device(&op->dev);
err:
devres_release_group(&op->dev, mpc85xx_l2_err_probe);
edac_device_free_ctl_info(edac_dev);
return res;
}
static int mpc85xx_l2_err_remove(struct of_device *op)
{
struct edac_device_ctl_info *edac_dev = dev_get_drvdata(&op->dev);
struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
debugf0("%s()\n", __func__);
if (edac_op_state == EDAC_OPSTATE_INT) {
out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINTEN, 0);
irq_dispose_mapping(pdata->irq);
}
out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS, orig_l2_err_disable);
edac_device_del_device(&op->dev);
edac_device_free_ctl_info(edac_dev);
return 0;
}
static struct of_device_id mpc85xx_l2_err_of_match[] = {
/* deprecate the fsl,85.. forms in the future, 2.6.30? */
{ .compatible = "fsl,8540-l2-cache-controller", },
{ .compatible = "fsl,8541-l2-cache-controller", },
{ .compatible = "fsl,8544-l2-cache-controller", },
{ .compatible = "fsl,8548-l2-cache-controller", },
{ .compatible = "fsl,8555-l2-cache-controller", },
{ .compatible = "fsl,8568-l2-cache-controller", },
{ .compatible = "fsl,mpc8536-l2-cache-controller", },
{ .compatible = "fsl,mpc8540-l2-cache-controller", },
{ .compatible = "fsl,mpc8541-l2-cache-controller", },
{ .compatible = "fsl,mpc8544-l2-cache-controller", },
{ .compatible = "fsl,mpc8548-l2-cache-controller", },
{ .compatible = "fsl,mpc8555-l2-cache-controller", },
{ .compatible = "fsl,mpc8560-l2-cache-controller", },
{ .compatible = "fsl,mpc8568-l2-cache-controller", },
{ .compatible = "fsl,mpc8572-l2-cache-controller", },
{ .compatible = "fsl,p2020-l2-cache-controller", },
{},
};
static struct of_platform_driver mpc85xx_l2_err_driver = {
.owner = THIS_MODULE,
.name = "mpc85xx_l2_err",
.match_table = mpc85xx_l2_err_of_match,
.probe = mpc85xx_l2_err_probe,
.remove = mpc85xx_l2_err_remove,
.driver = {
.name = "mpc85xx_l2_err",
.owner = THIS_MODULE,
},
};
/**************************** MC Err device ***************************/
static void mpc85xx_mc_check(struct mem_ctl_info *mci)
{
struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
struct csrow_info *csrow;
u32 err_detect;
u32 syndrome;
u32 err_addr;
u32 pfn;
int row_index;
err_detect = in_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT);
if (!err_detect)
return;
mpc85xx_mc_printk(mci, KERN_ERR, "Err Detect Register: %#8.8x\n",
err_detect);
/* no more processing if not ECC bit errors */
if (!(err_detect & (DDR_EDE_SBE | DDR_EDE_MBE))) {
out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT, err_detect);
return;
}
syndrome = in_be32(pdata->mc_vbase + MPC85XX_MC_CAPTURE_ECC);
err_addr = in_be32(pdata->mc_vbase + MPC85XX_MC_CAPTURE_ADDRESS);
pfn = err_addr >> PAGE_SHIFT;
for (row_index = 0; row_index < mci->nr_csrows; row_index++) {
csrow = &mci->csrows[row_index];
if ((pfn >= csrow->first_page) && (pfn <= csrow->last_page))
break;
}
mpc85xx_mc_printk(mci, KERN_ERR, "Capture Data High: %#8.8x\n",
in_be32(pdata->mc_vbase +
MPC85XX_MC_CAPTURE_DATA_HI));
mpc85xx_mc_printk(mci, KERN_ERR, "Capture Data Low: %#8.8x\n",
in_be32(pdata->mc_vbase +
MPC85XX_MC_CAPTURE_DATA_LO));
mpc85xx_mc_printk(mci, KERN_ERR, "syndrome: %#8.8x\n", syndrome);
mpc85xx_mc_printk(mci, KERN_ERR, "err addr: %#8.8x\n", err_addr);
mpc85xx_mc_printk(mci, KERN_ERR, "PFN: %#8.8x\n", pfn);
/* we are out of range */
if (row_index == mci->nr_csrows)
mpc85xx_mc_printk(mci, KERN_ERR, "PFN out of range!\n");
if (err_detect & DDR_EDE_SBE)
edac_mc_handle_ce(mci, pfn, err_addr & PAGE_MASK,
syndrome, row_index, 0, mci->ctl_name);
if (err_detect & DDR_EDE_MBE)
edac_mc_handle_ue(mci, pfn, err_addr & PAGE_MASK,
row_index, mci->ctl_name);
out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT, err_detect);
}
static irqreturn_t mpc85xx_mc_isr(int irq, void *dev_id)
{
struct mem_ctl_info *mci = dev_id;
struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
u32 err_detect;
err_detect = in_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT);
if (!err_detect)
return IRQ_NONE;
mpc85xx_mc_check(mci);
return IRQ_HANDLED;
}
static void __devinit mpc85xx_init_csrows(struct mem_ctl_info *mci)
{
struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
struct csrow_info *csrow;
u32 sdram_ctl;
u32 sdtype;
enum mem_type mtype;
u32 cs_bnds;
int index;
sdram_ctl = in_be32(pdata->mc_vbase + MPC85XX_MC_DDR_SDRAM_CFG);
sdtype = sdram_ctl & DSC_SDTYPE_MASK;
if (sdram_ctl & DSC_RD_EN) {
switch (sdtype) {
case DSC_SDTYPE_DDR:
mtype = MEM_RDDR;
break;
case DSC_SDTYPE_DDR2:
mtype = MEM_RDDR2;
break;
case DSC_SDTYPE_DDR3:
mtype = MEM_RDDR3;
break;
default:
mtype = MEM_UNKNOWN;
break;
}
} else {
switch (sdtype) {
case DSC_SDTYPE_DDR:
mtype = MEM_DDR;
break;
case DSC_SDTYPE_DDR2:
mtype = MEM_DDR2;
break;
case DSC_SDTYPE_DDR3:
mtype = MEM_DDR3;
break;
default:
mtype = MEM_UNKNOWN;
break;
}
}
for (index = 0; index < mci->nr_csrows; index++) {
u32 start;
u32 end;
csrow = &mci->csrows[index];
cs_bnds = in_be32(pdata->mc_vbase + MPC85XX_MC_CS_BNDS_0 +
(index * MPC85XX_MC_CS_BNDS_OFS));
start = (cs_bnds & 0xffff0000) >> 16;
end = (cs_bnds & 0x0000ffff);
if (start == end)
continue; /* not populated */
start <<= (24 - PAGE_SHIFT);
end <<= (24 - PAGE_SHIFT);
end |= (1 << (24 - PAGE_SHIFT)) - 1;
csrow->first_page = start >> PAGE_SHIFT;
csrow->last_page = end >> PAGE_SHIFT;
csrow->nr_pages = end + 1 - start;
csrow->grain = 8;
csrow->mtype = mtype;
csrow->dtype = DEV_UNKNOWN;
if (sdram_ctl & DSC_X32_EN)
csrow->dtype = DEV_X32;
csrow->edac_mode = EDAC_SECDED;
}
}
static int __devinit mpc85xx_mc_err_probe(struct of_device *op,
const struct of_device_id *match)
{
struct mem_ctl_info *mci;
struct mpc85xx_mc_pdata *pdata;
struct resource r;
u32 sdram_ctl;
int res;
if (!devres_open_group(&op->dev, mpc85xx_mc_err_probe, GFP_KERNEL))
return -ENOMEM;
mci = edac_mc_alloc(sizeof(*pdata), 4, 1, edac_mc_idx);
if (!mci) {
devres_release_group(&op->dev, mpc85xx_mc_err_probe);
return -ENOMEM;
}
pdata = mci->pvt_info;
pdata->name = "mpc85xx_mc_err";
pdata->irq = NO_IRQ;
mci->dev = &op->dev;
pdata->edac_idx = edac_mc_idx++;
dev_set_drvdata(mci->dev, mci);
mci->ctl_name = pdata->name;
mci->dev_name = pdata->name;
res = of_address_to_resource(op->node, 0, &r);
if (res) {
printk(KERN_ERR "%s: Unable to get resource for MC err regs\n",
__func__);
goto err;
}
if (!devm_request_mem_region(&op->dev, r.start,
r.end - r.start + 1, pdata->name)) {
printk(KERN_ERR "%s: Error while requesting mem region\n",
__func__);
res = -EBUSY;
goto err;
}
pdata->mc_vbase = devm_ioremap(&op->dev, r.start, r.end - r.start + 1);
if (!pdata->mc_vbase) {
printk(KERN_ERR "%s: Unable to setup MC err regs\n", __func__);
res = -ENOMEM;
goto err;
}
sdram_ctl = in_be32(pdata->mc_vbase + MPC85XX_MC_DDR_SDRAM_CFG);
if (!(sdram_ctl & DSC_ECC_EN)) {
/* no ECC */
printk(KERN_WARNING "%s: No ECC DIMMs discovered\n", __func__);
res = -ENODEV;
goto err;
}
debugf3("%s(): init mci\n", __func__);
mci->mtype_cap = MEM_FLAG_RDDR | MEM_FLAG_RDDR2 |
MEM_FLAG_DDR | MEM_FLAG_DDR2;
mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED;
mci->edac_cap = EDAC_FLAG_SECDED;
mci->mod_name = EDAC_MOD_STR;
mci->mod_ver = MPC85XX_REVISION;
if (edac_op_state == EDAC_OPSTATE_POLL)
mci->edac_check = mpc85xx_mc_check;
mci->ctl_page_to_phys = NULL;
mci->scrub_mode = SCRUB_SW_SRC;
mpc85xx_set_mc_sysfs_attributes(mci);
mpc85xx_init_csrows(mci);
#ifdef CONFIG_EDAC_DEBUG
edac_mc_register_mcidev_debug((struct attribute **)debug_attr);
#endif
/* store the original error disable bits */
orig_ddr_err_disable =
in_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE);
out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE, 0);
/* clear all error bits */
out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT, ~0);
if (edac_mc_add_mc(mci)) {
debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
goto err;
}
if (edac_op_state == EDAC_OPSTATE_INT) {
out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_INT_EN,
DDR_EIE_MBEE | DDR_EIE_SBEE);
/* store the original error management threshold */
orig_ddr_err_sbe = in_be32(pdata->mc_vbase +
MPC85XX_MC_ERR_SBE) & 0xff0000;
/* set threshold to 1 error per interrupt */
out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_SBE, 0x10000);
/* register interrupts */
pdata->irq = irq_of_parse_and_map(op->node, 0);
res = devm_request_irq(&op->dev, pdata->irq,
mpc85xx_mc_isr,
IRQF_DISABLED | IRQF_SHARED,
"[EDAC] MC err", mci);
if (res < 0) {
printk(KERN_ERR "%s: Unable to request irq %d for "
"MPC85xx DRAM ERR\n", __func__, pdata->irq);
irq_dispose_mapping(pdata->irq);
res = -ENODEV;
goto err2;
}
printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for MC\n",
pdata->irq);
}
devres_remove_group(&op->dev, mpc85xx_mc_err_probe);
debugf3("%s(): success\n", __func__);
printk(KERN_INFO EDAC_MOD_STR " MC err registered\n");
return 0;
err2:
edac_mc_del_mc(&op->dev);
err:
devres_release_group(&op->dev, mpc85xx_mc_err_probe);
edac_mc_free(mci);
return res;
}
static int mpc85xx_mc_err_remove(struct of_device *op)
{
struct mem_ctl_info *mci = dev_get_drvdata(&op->dev);
struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
debugf0("%s()\n", __func__);
if (edac_op_state == EDAC_OPSTATE_INT) {
out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_INT_EN, 0);
irq_dispose_mapping(pdata->irq);
}
out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE,
orig_ddr_err_disable);
out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_SBE, orig_ddr_err_sbe);
edac_mc_del_mc(&op->dev);
edac_mc_free(mci);
return 0;
}
static struct of_device_id mpc85xx_mc_err_of_match[] = {
/* deprecate the fsl,85.. forms in the future, 2.6.30? */
{ .compatible = "fsl,8540-memory-controller", },
{ .compatible = "fsl,8541-memory-controller", },
{ .compatible = "fsl,8544-memory-controller", },
{ .compatible = "fsl,8548-memory-controller", },
{ .compatible = "fsl,8555-memory-controller", },
{ .compatible = "fsl,8568-memory-controller", },
{ .compatible = "fsl,mpc8536-memory-controller", },
{ .compatible = "fsl,mpc8540-memory-controller", },
{ .compatible = "fsl,mpc8541-memory-controller", },
{ .compatible = "fsl,mpc8544-memory-controller", },
{ .compatible = "fsl,mpc8548-memory-controller", },
{ .compatible = "fsl,mpc8555-memory-controller", },
{ .compatible = "fsl,mpc8560-memory-controller", },
{ .compatible = "fsl,mpc8568-memory-controller", },
{ .compatible = "fsl,mpc8572-memory-controller", },
{ .compatible = "fsl,mpc8349-memory-controller", },
{ .compatible = "fsl,p2020-memory-controller", },
{},
};
static struct of_platform_driver mpc85xx_mc_err_driver = {
.owner = THIS_MODULE,
.name = "mpc85xx_mc_err",
.match_table = mpc85xx_mc_err_of_match,
.probe = mpc85xx_mc_err_probe,
.remove = mpc85xx_mc_err_remove,
.driver = {
.name = "mpc85xx_mc_err",
.owner = THIS_MODULE,
},
};
#ifdef CONFIG_MPC85xx
static void __init mpc85xx_mc_clear_rfxe(void *data)
{
orig_hid1[smp_processor_id()] = mfspr(SPRN_HID1);
mtspr(SPRN_HID1, (orig_hid1[smp_processor_id()] & ~0x20000));
}
#endif
static int __init mpc85xx_mc_init(void)
{
int res = 0;
printk(KERN_INFO "Freescale(R) MPC85xx EDAC driver, "
"(C) 2006 Montavista Software\n");
/* make sure error reporting method is sane */
switch (edac_op_state) {
case EDAC_OPSTATE_POLL:
case EDAC_OPSTATE_INT:
break;
default:
edac_op_state = EDAC_OPSTATE_INT;
break;
}
res = of_register_platform_driver(&mpc85xx_mc_err_driver);
if (res)
printk(KERN_WARNING EDAC_MOD_STR "MC fails to register\n");
res = of_register_platform_driver(&mpc85xx_l2_err_driver);
if (res)
printk(KERN_WARNING EDAC_MOD_STR "L2 fails to register\n");
#ifdef CONFIG_PCI
res = of_register_platform_driver(&mpc85xx_pci_err_driver);
if (res)
printk(KERN_WARNING EDAC_MOD_STR "PCI fails to register\n");
#endif
#ifdef CONFIG_MPC85xx
/*
* need to clear HID1[RFXE] to disable machine check int
* so we can catch it
*/
if (edac_op_state == EDAC_OPSTATE_INT)
on_each_cpu(mpc85xx_mc_clear_rfxe, NULL, 0);
#endif
return 0;
}
module_init(mpc85xx_mc_init);
#ifdef CONFIG_MPC85xx
static void __exit mpc85xx_mc_restore_hid1(void *data)
{
mtspr(SPRN_HID1, orig_hid1[smp_processor_id()]);
}
#endif
static void __exit mpc85xx_mc_exit(void)
{
#ifdef CONFIG_MPC85xx
on_each_cpu(mpc85xx_mc_restore_hid1, NULL, 0);
#endif
#ifdef CONFIG_PCI
of_unregister_platform_driver(&mpc85xx_pci_err_driver);
#endif
of_unregister_platform_driver(&mpc85xx_l2_err_driver);
of_unregister_platform_driver(&mpc85xx_mc_err_driver);
}
module_exit(mpc85xx_mc_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Montavista Software, Inc.");
module_param(edac_op_state, int, 0444);
MODULE_PARM_DESC(edac_op_state,
"EDAC Error Reporting state: 0=Poll, 2=Interrupt");
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