336 lines
8.9 KiB
C
336 lines
8.9 KiB
C
/*
|
|
* Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
|
|
* Copyright (c) 2007, 2008 Mellanox Technologies. 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/workqueue.h>
|
|
#include <linux/module.h>
|
|
|
|
#include "mlx4.h"
|
|
|
|
enum {
|
|
MLX4_CATAS_POLL_INTERVAL = 5 * HZ,
|
|
};
|
|
|
|
|
|
|
|
int mlx4_internal_err_reset = 1;
|
|
module_param_named(internal_err_reset, mlx4_internal_err_reset, int, 0644);
|
|
MODULE_PARM_DESC(internal_err_reset,
|
|
"Reset device on internal errors if non-zero (default 1)");
|
|
|
|
static int read_vendor_id(struct mlx4_dev *dev)
|
|
{
|
|
u16 vendor_id = 0;
|
|
int ret;
|
|
|
|
ret = pci_read_config_word(dev->persist->pdev, 0, &vendor_id);
|
|
if (ret) {
|
|
mlx4_err(dev, "Failed to read vendor ID, ret=%d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (vendor_id == 0xffff) {
|
|
mlx4_err(dev, "PCI can't be accessed to read vendor id\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mlx4_reset_master(struct mlx4_dev *dev)
|
|
{
|
|
int err = 0;
|
|
|
|
if (mlx4_is_master(dev))
|
|
mlx4_report_internal_err_comm_event(dev);
|
|
|
|
if (!pci_channel_offline(dev->persist->pdev)) {
|
|
err = read_vendor_id(dev);
|
|
/* If PCI can't be accessed to read vendor ID we assume that its
|
|
* link was disabled and chip was already reset.
|
|
*/
|
|
if (err)
|
|
return 0;
|
|
|
|
err = mlx4_reset(dev);
|
|
if (err)
|
|
mlx4_err(dev, "Fail to reset HCA\n");
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int mlx4_reset_slave(struct mlx4_dev *dev)
|
|
{
|
|
#define COM_CHAN_RST_REQ_OFFSET 0x10
|
|
#define COM_CHAN_RST_ACK_OFFSET 0x08
|
|
|
|
u32 comm_flags;
|
|
u32 rst_req;
|
|
u32 rst_ack;
|
|
unsigned long end;
|
|
struct mlx4_priv *priv = mlx4_priv(dev);
|
|
|
|
if (pci_channel_offline(dev->persist->pdev))
|
|
return 0;
|
|
|
|
comm_flags = swab32(readl((__iomem char *)priv->mfunc.comm +
|
|
MLX4_COMM_CHAN_FLAGS));
|
|
if (comm_flags == 0xffffffff) {
|
|
mlx4_err(dev, "VF reset is not needed\n");
|
|
return 0;
|
|
}
|
|
|
|
if (!(dev->caps.vf_caps & MLX4_VF_CAP_FLAG_RESET)) {
|
|
mlx4_err(dev, "VF reset is not supported\n");
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
rst_req = (comm_flags & (u32)(1 << COM_CHAN_RST_REQ_OFFSET)) >>
|
|
COM_CHAN_RST_REQ_OFFSET;
|
|
rst_ack = (comm_flags & (u32)(1 << COM_CHAN_RST_ACK_OFFSET)) >>
|
|
COM_CHAN_RST_ACK_OFFSET;
|
|
if (rst_req != rst_ack) {
|
|
mlx4_err(dev, "Communication channel isn't sync, fail to send reset\n");
|
|
return -EIO;
|
|
}
|
|
|
|
rst_req ^= 1;
|
|
mlx4_warn(dev, "VF is sending reset request to Firmware\n");
|
|
comm_flags = rst_req << COM_CHAN_RST_REQ_OFFSET;
|
|
__raw_writel((__force u32)cpu_to_be32(comm_flags),
|
|
(__iomem char *)priv->mfunc.comm + MLX4_COMM_CHAN_FLAGS);
|
|
|
|
end = msecs_to_jiffies(MLX4_COMM_TIME) + jiffies;
|
|
while (time_before(jiffies, end)) {
|
|
comm_flags = swab32(readl((__iomem char *)priv->mfunc.comm +
|
|
MLX4_COMM_CHAN_FLAGS));
|
|
rst_ack = (comm_flags & (u32)(1 << COM_CHAN_RST_ACK_OFFSET)) >>
|
|
COM_CHAN_RST_ACK_OFFSET;
|
|
|
|
/* Reading rst_req again since the communication channel can
|
|
* be reset at any time by the PF and all its bits will be
|
|
* set to zero.
|
|
*/
|
|
rst_req = (comm_flags & (u32)(1 << COM_CHAN_RST_REQ_OFFSET)) >>
|
|
COM_CHAN_RST_REQ_OFFSET;
|
|
|
|
if (rst_ack == rst_req) {
|
|
mlx4_warn(dev, "VF Reset succeed\n");
|
|
return 0;
|
|
}
|
|
cond_resched();
|
|
}
|
|
mlx4_err(dev, "Fail to send reset over the communication channel\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
int mlx4_comm_internal_err(u32 slave_read)
|
|
{
|
|
return (u32)COMM_CHAN_EVENT_INTERNAL_ERR ==
|
|
(slave_read & (u32)COMM_CHAN_EVENT_INTERNAL_ERR) ? 1 : 0;
|
|
}
|
|
|
|
void mlx4_enter_error_state(struct mlx4_dev_persistent *persist)
|
|
{
|
|
int err;
|
|
struct mlx4_dev *dev;
|
|
|
|
if (!mlx4_internal_err_reset)
|
|
return;
|
|
|
|
mutex_lock(&persist->device_state_mutex);
|
|
if (persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR)
|
|
goto out;
|
|
|
|
dev = persist->dev;
|
|
mlx4_err(dev, "device is going to be reset\n");
|
|
if (mlx4_is_slave(dev)) {
|
|
err = mlx4_reset_slave(dev);
|
|
} else {
|
|
mlx4_crdump_collect(dev);
|
|
err = mlx4_reset_master(dev);
|
|
}
|
|
|
|
if (!err) {
|
|
mlx4_err(dev, "device was reset successfully\n");
|
|
} else {
|
|
/* EEH could have disabled the PCI channel during reset. That's
|
|
* recoverable and the PCI error flow will handle it.
|
|
*/
|
|
if (!pci_channel_offline(dev->persist->pdev))
|
|
BUG_ON(1);
|
|
}
|
|
dev->persist->state |= MLX4_DEVICE_STATE_INTERNAL_ERROR;
|
|
mutex_unlock(&persist->device_state_mutex);
|
|
|
|
/* At that step HW was already reset, now notify clients */
|
|
mlx4_dispatch_event(dev, MLX4_DEV_EVENT_CATASTROPHIC_ERROR, NULL);
|
|
mlx4_cmd_wake_completions(dev);
|
|
return;
|
|
|
|
out:
|
|
mutex_unlock(&persist->device_state_mutex);
|
|
}
|
|
|
|
static void mlx4_handle_error_state(struct mlx4_dev_persistent *persist)
|
|
{
|
|
struct mlx4_dev *dev = persist->dev;
|
|
struct devlink *devlink;
|
|
int err = 0;
|
|
|
|
mlx4_enter_error_state(persist);
|
|
devlink = priv_to_devlink(mlx4_priv(dev));
|
|
devl_lock(devlink);
|
|
mutex_lock(&persist->interface_state_mutex);
|
|
if (persist->interface_state & MLX4_INTERFACE_STATE_UP &&
|
|
!(persist->interface_state & MLX4_INTERFACE_STATE_DELETION)) {
|
|
err = mlx4_restart_one(persist->pdev);
|
|
mlx4_info(persist->dev, "mlx4_restart_one was ended, ret=%d\n",
|
|
err);
|
|
}
|
|
mutex_unlock(&persist->interface_state_mutex);
|
|
devl_unlock(devlink);
|
|
}
|
|
|
|
static void dump_err_buf(struct mlx4_dev *dev)
|
|
{
|
|
struct mlx4_priv *priv = mlx4_priv(dev);
|
|
|
|
int i;
|
|
|
|
mlx4_err(dev, "Internal error detected:\n");
|
|
for (i = 0; i < priv->fw.catas_size; ++i)
|
|
mlx4_err(dev, " buf[%02x]: %08x\n",
|
|
i, swab32(readl(priv->catas_err.map + i)));
|
|
}
|
|
|
|
static void poll_catas(struct timer_list *t)
|
|
{
|
|
struct mlx4_priv *priv = from_timer(priv, t, catas_err.timer);
|
|
struct mlx4_dev *dev = &priv->dev;
|
|
u32 slave_read;
|
|
|
|
if (mlx4_is_slave(dev)) {
|
|
slave_read = swab32(readl(&priv->mfunc.comm->slave_read));
|
|
if (mlx4_comm_internal_err(slave_read)) {
|
|
mlx4_warn(dev, "Internal error detected on the communication channel\n");
|
|
goto internal_err;
|
|
}
|
|
} else if (readl(priv->catas_err.map)) {
|
|
dump_err_buf(dev);
|
|
goto internal_err;
|
|
}
|
|
|
|
if (dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) {
|
|
mlx4_warn(dev, "Internal error mark was detected on device\n");
|
|
goto internal_err;
|
|
}
|
|
|
|
mod_timer(&priv->catas_err.timer,
|
|
round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL));
|
|
return;
|
|
|
|
internal_err:
|
|
if (mlx4_internal_err_reset)
|
|
queue_work(dev->persist->catas_wq, &dev->persist->catas_work);
|
|
}
|
|
|
|
static void catas_reset(struct work_struct *work)
|
|
{
|
|
struct mlx4_dev_persistent *persist =
|
|
container_of(work, struct mlx4_dev_persistent,
|
|
catas_work);
|
|
|
|
mlx4_handle_error_state(persist);
|
|
}
|
|
|
|
void mlx4_start_catas_poll(struct mlx4_dev *dev)
|
|
{
|
|
struct mlx4_priv *priv = mlx4_priv(dev);
|
|
phys_addr_t addr;
|
|
|
|
INIT_LIST_HEAD(&priv->catas_err.list);
|
|
timer_setup(&priv->catas_err.timer, poll_catas, 0);
|
|
priv->catas_err.map = NULL;
|
|
|
|
if (!mlx4_is_slave(dev)) {
|
|
addr = pci_resource_start(dev->persist->pdev,
|
|
priv->fw.catas_bar) +
|
|
priv->fw.catas_offset;
|
|
|
|
priv->catas_err.map = ioremap(addr, priv->fw.catas_size * 4);
|
|
if (!priv->catas_err.map) {
|
|
mlx4_warn(dev, "Failed to map internal error buffer at 0x%llx\n",
|
|
(unsigned long long)addr);
|
|
return;
|
|
}
|
|
}
|
|
|
|
priv->catas_err.timer.expires =
|
|
round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL);
|
|
add_timer(&priv->catas_err.timer);
|
|
}
|
|
|
|
void mlx4_stop_catas_poll(struct mlx4_dev *dev)
|
|
{
|
|
struct mlx4_priv *priv = mlx4_priv(dev);
|
|
|
|
del_timer_sync(&priv->catas_err.timer);
|
|
|
|
if (priv->catas_err.map) {
|
|
iounmap(priv->catas_err.map);
|
|
priv->catas_err.map = NULL;
|
|
}
|
|
|
|
if (dev->persist->interface_state & MLX4_INTERFACE_STATE_DELETION)
|
|
flush_workqueue(dev->persist->catas_wq);
|
|
}
|
|
|
|
int mlx4_catas_init(struct mlx4_dev *dev)
|
|
{
|
|
INIT_WORK(&dev->persist->catas_work, catas_reset);
|
|
dev->persist->catas_wq = create_singlethread_workqueue("mlx4_health");
|
|
if (!dev->persist->catas_wq)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void mlx4_catas_end(struct mlx4_dev *dev)
|
|
{
|
|
if (dev->persist->catas_wq) {
|
|
destroy_workqueue(dev->persist->catas_wq);
|
|
dev->persist->catas_wq = NULL;
|
|
}
|
|
}
|