Contributors: 18
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Dave Jiang |
851 |
73.30% |
2 |
6.45% |
| Doug Thompson |
130 |
11.20% |
5 |
16.13% |
| Borislav Petkov |
60 |
5.17% |
6 |
19.35% |
| Joe Perches |
30 |
2.58% |
1 |
3.23% |
| Harry Ciao |
25 |
2.15% |
1 |
3.23% |
| Mauro Carvalho Chehab |
23 |
1.98% |
3 |
9.68% |
| Alan Cox |
14 |
1.21% |
1 |
3.23% |
| Lai Jiangshan |
5 |
0.43% |
1 |
3.23% |
| Dave Peterson |
5 |
0.43% |
2 |
6.45% |
| Jean Delvare |
3 |
0.26% |
1 |
3.23% |
| Kay Sievers |
3 |
0.26% |
1 |
3.23% |
| Robert Richter |
3 |
0.26% |
1 |
3.23% |
| Robert P. J. Day |
2 |
0.17% |
1 |
3.23% |
| Thomas Gleixner |
2 |
0.17% |
1 |
3.23% |
| Stephen Rothwell |
2 |
0.17% |
1 |
3.23% |
| Linus Torvalds |
1 |
0.09% |
1 |
3.23% |
| Anton Blanchard |
1 |
0.09% |
1 |
3.23% |
| Adrian Bunk |
1 |
0.09% |
1 |
3.23% |
| Total |
1161 |
|
31 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* EDAC PCI component
*
* Author: Dave Jiang <djiang@mvista.com>
*
* 2007 (c) MontaVista Software, Inc.
*/
#include <asm/page.h>
#include <linux/uaccess.h>
#include <linux/ctype.h>
#include <linux/highmem.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/spinlock.h>
#include <linux/sysctl.h>
#include <linux/timer.h>
#include "edac_pci.h"
#include "edac_module.h"
static DEFINE_MUTEX(edac_pci_ctls_mutex);
static LIST_HEAD(edac_pci_list);
static atomic_t pci_indexes = ATOMIC_INIT(0);
struct edac_pci_ctl_info *edac_pci_alloc_ctl_info(unsigned int sz_pvt,
const char *edac_pci_name)
{
struct edac_pci_ctl_info *pci;
edac_dbg(1, "\n");
pci = kzalloc(sizeof(struct edac_pci_ctl_info), GFP_KERNEL);
if (!pci)
return NULL;
if (sz_pvt) {
pci->pvt_info = kzalloc(sz_pvt, GFP_KERNEL);
if (!pci->pvt_info)
goto free;
}
pci->op_state = OP_ALLOC;
snprintf(pci->name, strlen(edac_pci_name) + 1, "%s", edac_pci_name);
return pci;
free:
kfree(pci);
return NULL;
}
EXPORT_SYMBOL_GPL(edac_pci_alloc_ctl_info);
void edac_pci_free_ctl_info(struct edac_pci_ctl_info *pci)
{
edac_dbg(1, "\n");
edac_pci_remove_sysfs(pci);
}
EXPORT_SYMBOL_GPL(edac_pci_free_ctl_info);
/*
* find_edac_pci_by_dev()
* scans the edac_pci list for a specific 'struct device *'
*
* return NULL if not found, or return control struct pointer
*/
static struct edac_pci_ctl_info *find_edac_pci_by_dev(struct device *dev)
{
struct edac_pci_ctl_info *pci;
struct list_head *item;
edac_dbg(1, "\n");
list_for_each(item, &edac_pci_list) {
pci = list_entry(item, struct edac_pci_ctl_info, link);
if (pci->dev == dev)
return pci;
}
return NULL;
}
/*
* add_edac_pci_to_global_list
* Before calling this function, caller must assign a unique value to
* edac_dev->pci_idx.
* Return:
* 0 on success
* 1 on failure
*/
static int add_edac_pci_to_global_list(struct edac_pci_ctl_info *pci)
{
struct list_head *item, *insert_before;
struct edac_pci_ctl_info *rover;
edac_dbg(1, "\n");
insert_before = &edac_pci_list;
/* Determine if already on the list */
rover = find_edac_pci_by_dev(pci->dev);
if (unlikely(rover != NULL))
goto fail0;
/* Insert in ascending order by 'pci_idx', so find position */
list_for_each(item, &edac_pci_list) {
rover = list_entry(item, struct edac_pci_ctl_info, link);
if (rover->pci_idx >= pci->pci_idx) {
if (unlikely(rover->pci_idx == pci->pci_idx))
goto fail1;
insert_before = item;
break;
}
}
list_add_tail_rcu(&pci->link, insert_before);
return 0;
fail0:
edac_printk(KERN_WARNING, EDAC_PCI,
"%s (%s) %s %s already assigned %d\n",
dev_name(rover->dev), edac_dev_name(rover),
rover->mod_name, rover->ctl_name, rover->pci_idx);
return 1;
fail1:
edac_printk(KERN_WARNING, EDAC_PCI,
"but in low-level driver: attempt to assign\n"
"\tduplicate pci_idx %d in %s()\n", rover->pci_idx,
__func__);
return 1;
}
/*
* del_edac_pci_from_global_list
*
* remove the PCI control struct from the global list
*/
static void del_edac_pci_from_global_list(struct edac_pci_ctl_info *pci)
{
list_del_rcu(&pci->link);
/* these are for safe removal of devices from global list while
* NMI handlers may be traversing list
*/
synchronize_rcu();
INIT_LIST_HEAD(&pci->link);
}
/*
* edac_pci_workq_function()
*
* periodic function that performs the operation
* scheduled by a workq request, for a given PCI control struct
*/
static void edac_pci_workq_function(struct work_struct *work_req)
{
struct delayed_work *d_work = to_delayed_work(work_req);
struct edac_pci_ctl_info *pci = to_edac_pci_ctl_work(d_work);
int msec;
unsigned long delay;
edac_dbg(3, "checking\n");
mutex_lock(&edac_pci_ctls_mutex);
if (pci->op_state != OP_RUNNING_POLL) {
mutex_unlock(&edac_pci_ctls_mutex);
return;
}
if (edac_pci_get_check_errors())
pci->edac_check(pci);
/* if we are on a one second period, then use round */
msec = edac_pci_get_poll_msec();
if (msec == 1000)
delay = round_jiffies_relative(msecs_to_jiffies(msec));
else
delay = msecs_to_jiffies(msec);
edac_queue_work(&pci->work, delay);
mutex_unlock(&edac_pci_ctls_mutex);
}
int edac_pci_alloc_index(void)
{
return atomic_inc_return(&pci_indexes) - 1;
}
EXPORT_SYMBOL_GPL(edac_pci_alloc_index);
int edac_pci_add_device(struct edac_pci_ctl_info *pci, int edac_idx)
{
edac_dbg(0, "\n");
pci->pci_idx = edac_idx;
pci->start_time = jiffies;
mutex_lock(&edac_pci_ctls_mutex);
if (add_edac_pci_to_global_list(pci))
goto fail0;
if (edac_pci_create_sysfs(pci)) {
edac_pci_printk(pci, KERN_WARNING,
"failed to create sysfs pci\n");
goto fail1;
}
if (pci->edac_check) {
pci->op_state = OP_RUNNING_POLL;
INIT_DELAYED_WORK(&pci->work, edac_pci_workq_function);
edac_queue_work(&pci->work, msecs_to_jiffies(edac_pci_get_poll_msec()));
} else {
pci->op_state = OP_RUNNING_INTERRUPT;
}
edac_pci_printk(pci, KERN_INFO,
"Giving out device to module %s controller %s: DEV %s (%s)\n",
pci->mod_name, pci->ctl_name, pci->dev_name,
edac_op_state_to_string(pci->op_state));
mutex_unlock(&edac_pci_ctls_mutex);
return 0;
/* error unwind stack */
fail1:
del_edac_pci_from_global_list(pci);
fail0:
mutex_unlock(&edac_pci_ctls_mutex);
return 1;
}
EXPORT_SYMBOL_GPL(edac_pci_add_device);
struct edac_pci_ctl_info *edac_pci_del_device(struct device *dev)
{
struct edac_pci_ctl_info *pci;
edac_dbg(0, "\n");
mutex_lock(&edac_pci_ctls_mutex);
/* ensure the control struct is on the global list
* if not, then leave
*/
pci = find_edac_pci_by_dev(dev);
if (pci == NULL) {
mutex_unlock(&edac_pci_ctls_mutex);
return NULL;
}
pci->op_state = OP_OFFLINE;
del_edac_pci_from_global_list(pci);
mutex_unlock(&edac_pci_ctls_mutex);
if (pci->edac_check)
edac_stop_work(&pci->work);
edac_printk(KERN_INFO, EDAC_PCI,
"Removed device %d for %s %s: DEV %s\n",
pci->pci_idx, pci->mod_name, pci->ctl_name, edac_dev_name(pci));
return pci;
}
EXPORT_SYMBOL_GPL(edac_pci_del_device);
/*
* edac_pci_generic_check
*
* a Generic parity check API
*/
static void edac_pci_generic_check(struct edac_pci_ctl_info *pci)
{
edac_dbg(4, "\n");
edac_pci_do_parity_check();
}
/* free running instance index counter */
static int edac_pci_idx;
#define EDAC_PCI_GENCTL_NAME "EDAC PCI controller"
struct edac_pci_gen_data {
int edac_idx;
};
struct edac_pci_ctl_info *edac_pci_create_generic_ctl(struct device *dev,
const char *mod_name)
{
struct edac_pci_ctl_info *pci;
struct edac_pci_gen_data *pdata;
pci = edac_pci_alloc_ctl_info(sizeof(*pdata), EDAC_PCI_GENCTL_NAME);
if (!pci)
return NULL;
pdata = pci->pvt_info;
pci->dev = dev;
dev_set_drvdata(pci->dev, pci);
pci->dev_name = pci_name(to_pci_dev(dev));
pci->mod_name = mod_name;
pci->ctl_name = EDAC_PCI_GENCTL_NAME;
if (edac_op_state == EDAC_OPSTATE_POLL)
pci->edac_check = edac_pci_generic_check;
pdata->edac_idx = edac_pci_idx++;
if (edac_pci_add_device(pci, pdata->edac_idx) > 0) {
edac_dbg(3, "failed edac_pci_add_device()\n");
edac_pci_free_ctl_info(pci);
return NULL;
}
return pci;
}
EXPORT_SYMBOL_GPL(edac_pci_create_generic_ctl);
void edac_pci_release_generic_ctl(struct edac_pci_ctl_info *pci)
{
edac_dbg(0, "pci mod=%s\n", pci->mod_name);
edac_pci_del_device(pci->dev);
edac_pci_free_ctl_info(pci);
}
EXPORT_SYMBOL_GPL(edac_pci_release_generic_ctl);