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/*
* GHES/EDAC Linux driver
*
* This file may be distributed under the terms of the GNU General Public
* License version 2.
*
* Copyright (c) 2013 by Mauro Carvalho Chehab <mchehab@redhat.com>
*
* Red Hat Inc. http://www.redhat.com
*/
#include <acpi/ghes.h>
#include <linux/edac.h>
#include "edac_core.h"
#define GHES_PFX "ghes_edac: "
#define GHES_EDAC_REVISION " Ver: 1.0.0"
struct ghes_edac_pvt {
struct list_head list;
struct ghes *ghes;
struct mem_ctl_info *mci;
};
static LIST_HEAD(ghes_reglist);
static DEFINE_MUTEX(ghes_edac_lock);
static int ghes_edac_mc_num;
void ghes_edac_report_mem_error(struct ghes *ghes, int sev,
struct cper_sec_mem_err *mem_err)
{
}
EXPORT_SYMBOL_GPL(ghes_edac_report_mem_error);
int ghes_edac_register(struct ghes *ghes, struct device *dev)
{
int rc;
struct mem_ctl_info *mci;
struct edac_mc_layer layers[1];
struct csrow_info *csrow;
struct dimm_info *dimm;
struct ghes_edac_pvt *pvt;
layers[0].type = EDAC_MC_LAYER_ALL_MEM;
layers[0].size = 1;
layers[0].is_virt_csrow = true;
/*
* We need to serialize edac_mc_alloc() and edac_mc_add_mc(),
* to avoid duplicated memory controller numbers
*/
mutex_lock(&ghes_edac_lock);
mci = edac_mc_alloc(ghes_edac_mc_num, ARRAY_SIZE(layers), layers,
sizeof(*pvt));
if (!mci) {
pr_info(GHES_PFX "Can't allocate memory for EDAC data\n");
mutex_unlock(&ghes_edac_lock);
return -ENOMEM;
}
pvt = mci->pvt_info;
memset(pvt, 0, sizeof(*pvt));
list_add_tail(&pvt->list, &ghes_reglist);
pvt->ghes = ghes;
pvt->mci = mci;
mci->pdev = dev;
mci->mtype_cap = MEM_FLAG_EMPTY;
mci->edac_ctl_cap = EDAC_FLAG_NONE;
mci->edac_cap = EDAC_FLAG_NONE;
mci->mod_name = "ghes_edac.c";
mci->mod_ver = GHES_EDAC_REVISION;
mci->ctl_name = "ghes_edac";
mci->dev_name = "ghes";
csrow = mci->csrows[0];
dimm = csrow->channels[0]->dimm;
/* FIXME: FAKE DATA */
dimm->nr_pages = 1000;
dimm->grain = 128;
dimm->mtype = MEM_UNKNOWN;
dimm->dtype = DEV_UNKNOWN;
dimm->edac_mode = EDAC_SECDED;
rc = edac_mc_add_mc(mci);
if (rc < 0) {
pr_info(GHES_PFX "Can't register at EDAC core\n");
edac_mc_free(mci);
mutex_unlock(&ghes_edac_lock);
return -ENODEV;
}
ghes_edac_mc_num++;
mutex_unlock(&ghes_edac_lock);
return 0;
}
EXPORT_SYMBOL_GPL(ghes_edac_register);
void ghes_edac_unregister(struct ghes *ghes)
{
struct mem_ctl_info *mci;
struct ghes_edac_pvt *pvt;
list_for_each_entry(pvt, &ghes_reglist, list) {
if (ghes == pvt->ghes) {
mci = pvt->mci;
edac_mc_del_mc(mci->pdev);
edac_mc_free(mci);
list_del(&pvt->list);
}
}
}
EXPORT_SYMBOL_GPL(ghes_edac_unregister);
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