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/*
* Copyright (c) 2005 Cisco Systems. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/jiffies.h>
#include <linux/module.h>
#include <linux/timer.h>
#include <linux/workqueue.h>
#include "mthca_dev.h"
enum {
MTHCA_CATAS_POLL_INTERVAL = 5 * HZ,
MTHCA_CATAS_TYPE_INTERNAL = 0,
MTHCA_CATAS_TYPE_UPLINK = 3,
MTHCA_CATAS_TYPE_DDR = 4,
MTHCA_CATAS_TYPE_PARITY = 5,
};
static DEFINE_SPINLOCK(catas_lock);
static LIST_HEAD(catas_list);
static struct workqueue_struct *catas_wq;
static struct work_struct catas_work;
static int catas_reset_disable;
module_param_named(catas_reset_disable, catas_reset_disable, int, 0644);
MODULE_PARM_DESC(catas_reset_disable, "disable reset on catastrophic event if nonzero");
static void catas_reset(struct work_struct *work)
{
struct mthca_dev *dev, *tmpdev;
LIST_HEAD(tlist);
int ret;
mutex_lock(&mthca_device_mutex);
spin_lock_irq(&catas_lock);
list_splice_init(&catas_list, &tlist);
spin_unlock_irq(&catas_lock);
list_for_each_entry_safe(dev, tmpdev, &tlist, catas_err.list) {
struct pci_dev *pdev = dev->pdev;
ret = __mthca_restart_one(dev->pdev);
/* 'dev' now is not valid */
if (ret)
printk(KERN_ERR "mthca %s: Reset failed (%d)\n",
pci_name(pdev), ret);
else {
struct mthca_dev *d = pci_get_drvdata(pdev);
mthca_dbg(d, "Reset succeeded\n");
}
}
mutex_unlock(&mthca_device_mutex);
}
static void handle_catas(struct mthca_dev *dev)
{
struct ib_event event;
unsigned long flags;
const char *type;
int i;
event.device = &dev->ib_dev;
event.event = IB_EVENT_DEVICE_FATAL;
event.element.port_num = 0;
dev->active = false;
ib_dispatch_event(&event);
switch (swab32(readl(dev->catas_err.map)) >> 24) {
case MTHCA_CATAS_TYPE_INTERNAL:
type = "internal error";
break;
case MTHCA_CATAS_TYPE_UPLINK:
type = "uplink bus error";
break;
case MTHCA_CATAS_TYPE_DDR:
type = "DDR data error";
break;
case MTHCA_CATAS_TYPE_PARITY:
type = "internal parity error";
break;
default:
type = "unknown error";
break;
}
mthca_err(dev, "Catastrophic error detected: %s\n", type);
for (i = 0; i < dev->catas_err.size; ++i)
mthca_err(dev, " buf[%02x]: %08x\n",
i, swab32(readl(dev->catas_err.map + i)));
if (catas_reset_disable)
return;
spin_lock_irqsave(&catas_lock, flags);
list_add(&dev->catas_err.list, &catas_list);
queue_work(catas_wq, &catas_work);
spin_unlock_irqrestore(&catas_lock, flags);
}
static void poll_catas(unsigned long dev_ptr)
{
struct mthca_dev *dev = (struct mthca_dev *) dev_ptr;
int i;
for (i = 0; i < dev->catas_err.size; ++i)
if (readl(dev->catas_err.map + i)) {
handle_catas(dev);
return;
}
mod_timer(&dev->catas_err.timer,
round_jiffies(jiffies + MTHCA_CATAS_POLL_INTERVAL));
}
void mthca_start_catas_poll(struct mthca_dev *dev)
{
phys_addr_t addr;
init_timer(&dev->catas_err.timer);
dev->catas_err.map = NULL;
addr = pci_resource_start(dev->pdev, 0) +
((pci_resource_len(dev->pdev, 0) - 1) &
dev->catas_err.addr);
dev->catas_err.map = ioremap(addr, dev->catas_err.size * 4);
if (!dev->catas_err.map) {
mthca_warn(dev, "couldn't map catastrophic error region "
"at 0x%llx/0x%x\n", (unsigned long long) addr,
dev->catas_err.size * 4);
return;
}
dev->catas_err.timer.data = (unsigned long) dev;
dev->catas_err.timer.function = poll_catas;
dev->catas_err.timer.expires = jiffies + MTHCA_CATAS_POLL_INTERVAL;
INIT_LIST_HEAD(&dev->catas_err.list);
add_timer(&dev->catas_err.timer);
}
void mthca_stop_catas_poll(struct mthca_dev *dev)
{
del_timer_sync(&dev->catas_err.timer);
if (dev->catas_err.map)
iounmap(dev->catas_err.map);
spin_lock_irq(&catas_lock);
list_del(&dev->catas_err.list);
spin_unlock_irq(&catas_lock);
}
int __init mthca_catas_init(void)
{
INIT_WORK(&catas_work, catas_reset);
catas_wq = alloc_ordered_workqueue("mthca_catas", WQ_MEM_RECLAIM);
if (!catas_wq)
return -ENOMEM;
return 0;
}
void mthca_catas_cleanup(void)
{
destroy_workqueue(catas_wq);
}
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