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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) 2012 Cavium, Inc.
*
* 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/cvmx.h>
#include "edac_module.h"
#define EDAC_MOD_STR "octeon-l2c"
static void octeon_l2c_poll_oct1(struct edac_device_ctl_info *l2c)
{
union cvmx_l2t_err l2t_err, l2t_err_reset;
union cvmx_l2d_err l2d_err, l2d_err_reset;
l2t_err_reset.u64 = 0;
l2t_err.u64 = cvmx_read_csr(CVMX_L2T_ERR);
if (l2t_err.s.sec_err) {
edac_device_handle_ce(l2c, 0, 0,
"Tag Single bit error (corrected)");
l2t_err_reset.s.sec_err = 1;
}
if (l2t_err.s.ded_err) {
edac_device_handle_ue(l2c, 0, 0,
"Tag Double bit error (detected)");
l2t_err_reset.s.ded_err = 1;
}
if (l2t_err_reset.u64)
cvmx_write_csr(CVMX_L2T_ERR, l2t_err_reset.u64);
l2d_err_reset.u64 = 0;
l2d_err.u64 = cvmx_read_csr(CVMX_L2D_ERR);
if (l2d_err.s.sec_err) {
edac_device_handle_ce(l2c, 0, 1,
"Data Single bit error (corrected)");
l2d_err_reset.s.sec_err = 1;
}
if (l2d_err.s.ded_err) {
edac_device_handle_ue(l2c, 0, 1,
"Data Double bit error (detected)");
l2d_err_reset.s.ded_err = 1;
}
if (l2d_err_reset.u64)
cvmx_write_csr(CVMX_L2D_ERR, l2d_err_reset.u64);
}
static void _octeon_l2c_poll_oct2(struct edac_device_ctl_info *l2c, int tad)
{
union cvmx_l2c_err_tdtx err_tdtx, err_tdtx_reset;
union cvmx_l2c_err_ttgx err_ttgx, err_ttgx_reset;
char buf1[64];
char buf2[80];
err_tdtx_reset.u64 = 0;
err_tdtx.u64 = cvmx_read_csr(CVMX_L2C_ERR_TDTX(tad));
if (err_tdtx.s.dbe || err_tdtx.s.sbe ||
err_tdtx.s.vdbe || err_tdtx.s.vsbe)
snprintf(buf1, sizeof(buf1),
"type:%d, syn:0x%x, way:%d",
err_tdtx.s.type, err_tdtx.s.syn, err_tdtx.s.wayidx);
if (err_tdtx.s.dbe) {
snprintf(buf2, sizeof(buf2),
"L2D Double bit error (detected):%s", buf1);
err_tdtx_reset.s.dbe = 1;
edac_device_handle_ue(l2c, tad, 1, buf2);
}
if (err_tdtx.s.sbe) {
snprintf(buf2, sizeof(buf2),
"L2D Single bit error (corrected):%s", buf1);
err_tdtx_reset.s.sbe = 1;
edac_device_handle_ce(l2c, tad, 1, buf2);
}
if (err_tdtx.s.vdbe) {
snprintf(buf2, sizeof(buf2),
"VBF Double bit error (detected):%s", buf1);
err_tdtx_reset.s.vdbe = 1;
edac_device_handle_ue(l2c, tad, 1, buf2);
}
if (err_tdtx.s.vsbe) {
snprintf(buf2, sizeof(buf2),
"VBF Single bit error (corrected):%s", buf1);
err_tdtx_reset.s.vsbe = 1;
edac_device_handle_ce(l2c, tad, 1, buf2);
}
if (err_tdtx_reset.u64)
cvmx_write_csr(CVMX_L2C_ERR_TDTX(tad), err_tdtx_reset.u64);
err_ttgx_reset.u64 = 0;
err_ttgx.u64 = cvmx_read_csr(CVMX_L2C_ERR_TTGX(tad));
if (err_ttgx.s.dbe || err_ttgx.s.sbe)
snprintf(buf1, sizeof(buf1),
"type:%d, syn:0x%x, way:%d",
err_ttgx.s.type, err_ttgx.s.syn, err_ttgx.s.wayidx);
if (err_ttgx.s.dbe) {
snprintf(buf2, sizeof(buf2),
"Tag Double bit error (detected):%s", buf1);
err_ttgx_reset.s.dbe = 1;
edac_device_handle_ue(l2c, tad, 0, buf2);
}
if (err_ttgx.s.sbe) {
snprintf(buf2, sizeof(buf2),
"Tag Single bit error (corrected):%s", buf1);
err_ttgx_reset.s.sbe = 1;
edac_device_handle_ce(l2c, tad, 0, buf2);
}
if (err_ttgx_reset.u64)
cvmx_write_csr(CVMX_L2C_ERR_TTGX(tad), err_ttgx_reset.u64);
}
static void octeon_l2c_poll_oct2(struct edac_device_ctl_info *l2c)
{
int i;
for (i = 0; i < l2c->nr_instances; i++)
_octeon_l2c_poll_oct2(l2c, i);
}
static int octeon_l2c_probe(struct platform_device *pdev)
{
struct edac_device_ctl_info *l2c;
int num_tads = OCTEON_IS_MODEL(OCTEON_CN68XX) ? 4 : 1;
/* 'Tags' are block 0, 'Data' is block 1*/
l2c = edac_device_alloc_ctl_info(0, "l2c", num_tads, "l2c", 2, 0,
edac_device_alloc_index());
if (!l2c)
return -ENOMEM;
l2c->dev = &pdev->dev;
platform_set_drvdata(pdev, l2c);
l2c->dev_name = dev_name(&pdev->dev);
l2c->mod_name = "octeon-l2c";
l2c->ctl_name = "octeon_l2c_err";
if (OCTEON_IS_OCTEON1PLUS()) {
union cvmx_l2t_err l2t_err;
union cvmx_l2d_err l2d_err;
l2t_err.u64 = cvmx_read_csr(CVMX_L2T_ERR);
l2t_err.s.sec_intena = 0; /* We poll */
l2t_err.s.ded_intena = 0;
cvmx_write_csr(CVMX_L2T_ERR, l2t_err.u64);
l2d_err.u64 = cvmx_read_csr(CVMX_L2D_ERR);
l2d_err.s.sec_intena = 0; /* We poll */
l2d_err.s.ded_intena = 0;
cvmx_write_csr(CVMX_L2T_ERR, l2d_err.u64);
l2c->edac_check = octeon_l2c_poll_oct1;
} else {
/* OCTEON II */
l2c->edac_check = octeon_l2c_poll_oct2;
}
if (edac_device_add_device(l2c) > 0) {
pr_err("%s: edac_device_add_device() failed\n", __func__);
goto err;
}
return 0;
err:
edac_device_free_ctl_info(l2c);
return -ENXIO;
}
static void octeon_l2c_remove(struct platform_device *pdev)
{
struct edac_device_ctl_info *l2c = platform_get_drvdata(pdev);
edac_device_del_device(&pdev->dev);
edac_device_free_ctl_info(l2c);
}
static struct platform_driver octeon_l2c_driver = {
.probe = octeon_l2c_probe,
.remove = octeon_l2c_remove,
.driver = {
.name = "octeon_l2c_edac",
}
};
module_platform_driver(octeon_l2c_driver);
MODULE_DESCRIPTION("Cavium Octeon Secondary Caches (L2C) EDAC driver");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
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