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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2009 Wind River Systems,
* written by Ralf Baechle <ralf@linux-mips.org>
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/edac.h>
#include <asm/octeon/octeon.h>
#include <asm/octeon/cvmx-lmcx-defs.h>
#include "edac_core.h"
#include "edac_module.h"
#define OCTEON_MAX_MC 4
static void octeon_lmc_edac_poll(struct mem_ctl_info *mci)
{
union cvmx_lmcx_mem_cfg0 cfg0;
bool do_clear = false;
char msg[64];
cfg0.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(mci->mc_idx));
if (cfg0.s.sec_err || cfg0.s.ded_err) {
union cvmx_lmcx_fadr fadr;
fadr.u64 = cvmx_read_csr(CVMX_LMCX_FADR(mci->mc_idx));
snprintf(msg, sizeof(msg),
"DIMM %d rank %d bank %d row %d col %d",
fadr.cn30xx.fdimm, fadr.cn30xx.fbunk,
fadr.cn30xx.fbank, fadr.cn30xx.frow, fadr.cn30xx.fcol);
}
if (cfg0.s.sec_err) {
edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, 0, 0, 0,
-1, -1, -1, msg, "");
cfg0.s.sec_err = -1; /* Done, re-arm */
do_clear = true;
}
if (cfg0.s.ded_err) {
edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 0, 0, 0,
-1, -1, -1, msg, "");
cfg0.s.ded_err = -1; /* Done, re-arm */
do_clear = true;
}
if (do_clear)
cvmx_write_csr(CVMX_LMCX_MEM_CFG0(mci->mc_idx), cfg0.u64);
}
static void octeon_lmc_edac_poll_o2(struct mem_ctl_info *mci)
{
union cvmx_lmcx_int int_reg;
bool do_clear = false;
char msg[64];
int_reg.u64 = cvmx_read_csr(CVMX_LMCX_INT(mci->mc_idx));
if (int_reg.s.sec_err || int_reg.s.ded_err) {
union cvmx_lmcx_fadr fadr;
fadr.u64 = cvmx_read_csr(CVMX_LMCX_FADR(mci->mc_idx));
snprintf(msg, sizeof(msg),
"DIMM %d rank %d bank %d row %d col %d",
fadr.cn61xx.fdimm, fadr.cn61xx.fbunk,
fadr.cn61xx.fbank, fadr.cn61xx.frow, fadr.cn61xx.fcol);
}
if (int_reg.s.sec_err) {
edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, 0, 0, 0,
-1, -1, -1, msg, "");
int_reg.s.sec_err = -1; /* Done, re-arm */
do_clear = true;
}
if (int_reg.s.ded_err) {
edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 0, 0, 0,
-1, -1, -1, msg, "");
int_reg.s.ded_err = -1; /* Done, re-arm */
do_clear = true;
}
if (do_clear)
cvmx_write_csr(CVMX_LMCX_INT(mci->mc_idx), int_reg.u64);
}
static int octeon_lmc_edac_probe(struct platform_device *pdev)
{
struct mem_ctl_info *mci;
struct edac_mc_layer layers[1];
int mc = pdev->id;
layers[0].type = EDAC_MC_LAYER_CHANNEL;
layers[0].size = 1;
layers[0].is_virt_csrow = false;
if (OCTEON_IS_MODEL(OCTEON_FAM_1_PLUS)) {
union cvmx_lmcx_mem_cfg0 cfg0;
cfg0.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(0));
if (!cfg0.s.ecc_ena) {
dev_info(&pdev->dev, "Disabled (ECC not enabled)\n");
return 0;
}
mci = edac_mc_alloc(mc, ARRAY_SIZE(layers), layers, 0);
if (!mci)
return -ENXIO;
mci->pdev = &pdev->dev;
mci->dev_name = dev_name(&pdev->dev);
mci->mod_name = "octeon-lmc";
mci->ctl_name = "octeon-lmc-err";
mci->edac_check = octeon_lmc_edac_poll;
if (edac_mc_add_mc(mci)) {
dev_err(&pdev->dev, "edac_mc_add_mc() failed\n");
edac_mc_free(mci);
return -ENXIO;
}
cfg0.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(mc));
cfg0.s.intr_ded_ena = 0; /* We poll */
cfg0.s.intr_sec_ena = 0;
cvmx_write_csr(CVMX_LMCX_MEM_CFG0(mc), cfg0.u64);
} else {
/* OCTEON II */
union cvmx_lmcx_int_en en;
union cvmx_lmcx_config config;
config.u64 = cvmx_read_csr(CVMX_LMCX_CONFIG(0));
if (!config.s.ecc_ena) {
dev_info(&pdev->dev, "Disabled (ECC not enabled)\n");
return 0;
}
mci = edac_mc_alloc(mc, ARRAY_SIZE(layers), layers, 0);
if (!mci)
return -ENXIO;
mci->pdev = &pdev->dev;
mci->dev_name = dev_name(&pdev->dev);
mci->mod_name = "octeon-lmc";
mci->ctl_name = "co_lmc_err";
mci->edac_check = octeon_lmc_edac_poll_o2;
if (edac_mc_add_mc(mci)) {
dev_err(&pdev->dev, "edac_mc_add_mc() failed\n");
edac_mc_free(mci);
return -ENXIO;
}
en.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(mc));
en.s.intr_ded_ena = 0; /* We poll */
en.s.intr_sec_ena = 0;
cvmx_write_csr(CVMX_LMCX_MEM_CFG0(mc), en.u64);
}
platform_set_drvdata(pdev, mci);
return 0;
}
static int octeon_lmc_edac_remove(struct platform_device *pdev)
{
struct mem_ctl_info *mci = platform_get_drvdata(pdev);
edac_mc_del_mc(&pdev->dev);
edac_mc_free(mci);
return 0;
}
static struct platform_driver octeon_lmc_edac_driver = {
.probe = octeon_lmc_edac_probe,
.remove = octeon_lmc_edac_remove,
.driver = {
.name = "octeon_lmc_edac",
}
};
module_platform_driver(octeon_lmc_edac_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
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