blob: 3ca998874c50d583bbe3713d950bcaf7aa7f950b [file] [log] [blame]
/*
* Copyright (c) 2013-2015, 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/kernel.h>
#include <linux/module.h>
#include <linux/random.h>
#include <linux/vmalloc.h>
#include <linux/hardirq.h>
#include <linux/mlx5/driver.h>
#include <linux/kern_levels.h>
#include "mlx5_core.h"
#include "lib/eq.h"
#include "lib/mlx5.h"
#include "lib/pci_vsc.h"
#include "lib/tout.h"
#include "diag/fw_tracer.h"
enum {
MAX_MISSES = 3,
};
enum {
MLX5_HEALTH_SYNDR_FW_ERR = 0x1,
MLX5_HEALTH_SYNDR_IRISC_ERR = 0x7,
MLX5_HEALTH_SYNDR_HW_UNRECOVERABLE_ERR = 0x8,
MLX5_HEALTH_SYNDR_CRC_ERR = 0x9,
MLX5_HEALTH_SYNDR_FETCH_PCI_ERR = 0xa,
MLX5_HEALTH_SYNDR_HW_FTL_ERR = 0xb,
MLX5_HEALTH_SYNDR_ASYNC_EQ_OVERRUN_ERR = 0xc,
MLX5_HEALTH_SYNDR_EQ_ERR = 0xd,
MLX5_HEALTH_SYNDR_EQ_INV = 0xe,
MLX5_HEALTH_SYNDR_FFSER_ERR = 0xf,
MLX5_HEALTH_SYNDR_HIGH_TEMP = 0x10
};
enum {
MLX5_DROP_NEW_HEALTH_WORK,
};
enum {
MLX5_SENSOR_NO_ERR = 0,
MLX5_SENSOR_PCI_COMM_ERR = 1,
MLX5_SENSOR_PCI_ERR = 2,
MLX5_SENSOR_NIC_DISABLED = 3,
MLX5_SENSOR_NIC_SW_RESET = 4,
MLX5_SENSOR_FW_SYND_RFR = 5,
};
enum {
MLX5_SEVERITY_MASK = 0x7,
MLX5_SEVERITY_VALID_MASK = 0x8,
};
u8 mlx5_get_nic_state(struct mlx5_core_dev *dev)
{
return (ioread32be(&dev->iseg->cmdq_addr_l_sz) >> 8) & 7;
}
void mlx5_set_nic_state(struct mlx5_core_dev *dev, u8 state)
{
u32 cur_cmdq_addr_l_sz;
cur_cmdq_addr_l_sz = ioread32be(&dev->iseg->cmdq_addr_l_sz);
iowrite32be((cur_cmdq_addr_l_sz & 0xFFFFF000) |
state << MLX5_NIC_IFC_OFFSET,
&dev->iseg->cmdq_addr_l_sz);
}
static bool sensor_pci_not_working(struct mlx5_core_dev *dev)
{
struct mlx5_core_health *health = &dev->priv.health;
struct health_buffer __iomem *h = health->health;
/* Offline PCI reads return 0xffffffff */
return (ioread32be(&h->fw_ver) == 0xffffffff);
}
static int mlx5_health_get_rfr(u8 rfr_severity)
{
return rfr_severity >> MLX5_RFR_BIT_OFFSET;
}
static bool sensor_fw_synd_rfr(struct mlx5_core_dev *dev)
{
struct mlx5_core_health *health = &dev->priv.health;
struct health_buffer __iomem *h = health->health;
u8 synd = ioread8(&h->synd);
u8 rfr;
rfr = mlx5_health_get_rfr(ioread8(&h->rfr_severity));
if (rfr && synd)
mlx5_core_dbg(dev, "FW requests reset, synd: %d\n", synd);
return rfr && synd;
}
u32 mlx5_health_check_fatal_sensors(struct mlx5_core_dev *dev)
{
if (sensor_pci_not_working(dev))
return MLX5_SENSOR_PCI_COMM_ERR;
if (pci_channel_offline(dev->pdev))
return MLX5_SENSOR_PCI_ERR;
if (mlx5_get_nic_state(dev) == MLX5_NIC_IFC_DISABLED)
return MLX5_SENSOR_NIC_DISABLED;
if (mlx5_get_nic_state(dev) == MLX5_NIC_IFC_SW_RESET)
return MLX5_SENSOR_NIC_SW_RESET;
if (sensor_fw_synd_rfr(dev))
return MLX5_SENSOR_FW_SYND_RFR;
return MLX5_SENSOR_NO_ERR;
}
static int lock_sem_sw_reset(struct mlx5_core_dev *dev, bool lock)
{
enum mlx5_vsc_state state;
int ret;
if (!mlx5_core_is_pf(dev))
return -EBUSY;
/* Try to lock GW access, this stage doesn't return
* EBUSY because locked GW does not mean that other PF
* already started the reset.
*/
ret = mlx5_vsc_gw_lock(dev);
if (ret == -EBUSY)
return -EINVAL;
if (ret)
return ret;
state = lock ? MLX5_VSC_LOCK : MLX5_VSC_UNLOCK;
/* At this stage, if the return status == EBUSY, then we know
* for sure that another PF started the reset, so don't allow
* another reset.
*/
ret = mlx5_vsc_sem_set_space(dev, MLX5_SEMAPHORE_SW_RESET, state);
if (ret)
mlx5_core_warn(dev, "Failed to lock SW reset semaphore\n");
/* Unlock GW access */
mlx5_vsc_gw_unlock(dev);
return ret;
}
static bool reset_fw_if_needed(struct mlx5_core_dev *dev)
{
bool supported = (ioread32be(&dev->iseg->initializing) >>
MLX5_FW_RESET_SUPPORTED_OFFSET) & 1;
u32 fatal_error;
if (!supported)
return false;
/* The reset only needs to be issued by one PF. The health buffer is
* shared between all functions, and will be cleared during a reset.
* Check again to avoid a redundant 2nd reset. If the fatal errors was
* PCI related a reset won't help.
*/
fatal_error = mlx5_health_check_fatal_sensors(dev);
if (fatal_error == MLX5_SENSOR_PCI_COMM_ERR ||
fatal_error == MLX5_SENSOR_NIC_DISABLED ||
fatal_error == MLX5_SENSOR_NIC_SW_RESET) {
mlx5_core_warn(dev, "Not issuing FW reset. Either it's already done or won't help.");
return false;
}
mlx5_core_warn(dev, "Issuing FW Reset\n");
/* Write the NIC interface field to initiate the reset, the command
* interface address also resides here, don't overwrite it.
*/
mlx5_set_nic_state(dev, MLX5_NIC_IFC_SW_RESET);
return true;
}
static void enter_error_state(struct mlx5_core_dev *dev, bool force)
{
if (mlx5_health_check_fatal_sensors(dev) || force) { /* protected state setting */
dev->state = MLX5_DEVICE_STATE_INTERNAL_ERROR;
mlx5_cmd_flush(dev);
}
mlx5_notifier_call_chain(dev->priv.events, MLX5_DEV_EVENT_SYS_ERROR, (void *)1);
}
void mlx5_enter_error_state(struct mlx5_core_dev *dev, bool force)
{
bool err_detected = false;
/* Mark the device as fatal in order to abort FW commands */
if ((mlx5_health_check_fatal_sensors(dev) || force) &&
dev->state == MLX5_DEVICE_STATE_UP) {
dev->state = MLX5_DEVICE_STATE_INTERNAL_ERROR;
err_detected = true;
}
mutex_lock(&dev->intf_state_mutex);
if (!err_detected && dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR)
goto unlock;/* a previous error is still being handled */
enter_error_state(dev, force);
unlock:
mutex_unlock(&dev->intf_state_mutex);
}
void mlx5_error_sw_reset(struct mlx5_core_dev *dev)
{
unsigned long end, delay_ms = mlx5_tout_ms(dev, PCI_TOGGLE);
int lock = -EBUSY;
mutex_lock(&dev->intf_state_mutex);
if (dev->state != MLX5_DEVICE_STATE_INTERNAL_ERROR)
goto unlock;
mlx5_core_err(dev, "start\n");
if (mlx5_health_check_fatal_sensors(dev) == MLX5_SENSOR_FW_SYND_RFR) {
/* Get cr-dump and reset FW semaphore */
lock = lock_sem_sw_reset(dev, true);
if (lock == -EBUSY) {
delay_ms = mlx5_tout_ms(dev, FULL_CRDUMP);
goto recover_from_sw_reset;
}
/* Execute SW reset */
reset_fw_if_needed(dev);
}
recover_from_sw_reset:
/* Recover from SW reset */
end = jiffies + msecs_to_jiffies(delay_ms);
do {
if (mlx5_get_nic_state(dev) == MLX5_NIC_IFC_DISABLED)
break;
msleep(20);
} while (!time_after(jiffies, end));
if (mlx5_get_nic_state(dev) != MLX5_NIC_IFC_DISABLED) {
dev_err(&dev->pdev->dev, "NIC IFC still %d after %lums.\n",
mlx5_get_nic_state(dev), delay_ms);
}
/* Release FW semaphore if you are the lock owner */
if (!lock)
lock_sem_sw_reset(dev, false);
mlx5_core_err(dev, "end\n");
unlock:
mutex_unlock(&dev->intf_state_mutex);
}
static void mlx5_handle_bad_state(struct mlx5_core_dev *dev)
{
u8 nic_interface = mlx5_get_nic_state(dev);
switch (nic_interface) {
case MLX5_NIC_IFC_FULL:
mlx5_core_warn(dev, "Expected to see disabled NIC but it is full driver\n");
break;
case MLX5_NIC_IFC_DISABLED:
mlx5_core_warn(dev, "starting teardown\n");
break;
case MLX5_NIC_IFC_NO_DRAM_NIC:
mlx5_core_warn(dev, "Expected to see disabled NIC but it is no dram nic\n");
break;
case MLX5_NIC_IFC_SW_RESET:
/* The IFC mode field is 3 bits, so it will read 0x7 in 2 cases:
* 1. PCI has been disabled (ie. PCI-AER, PF driver unloaded
* and this is a VF), this is not recoverable by SW reset.
* Logging of this is handled elsewhere.
* 2. FW reset has been issued by another function, driver can
* be reloaded to recover after the mode switches to
* MLX5_NIC_IFC_DISABLED.
*/
if (dev->priv.health.fatal_error != MLX5_SENSOR_PCI_COMM_ERR)
mlx5_core_warn(dev, "NIC SW reset in progress\n");
break;
default:
mlx5_core_warn(dev, "Expected to see disabled NIC but it is has invalid value %d\n",
nic_interface);
}
mlx5_disable_device(dev);
}
int mlx5_health_wait_pci_up(struct mlx5_core_dev *dev)
{
unsigned long end;
end = jiffies + msecs_to_jiffies(mlx5_tout_ms(dev, FW_RESET));
while (sensor_pci_not_working(dev)) {
if (time_after(jiffies, end))
return -ETIMEDOUT;
msleep(100);
}
return 0;
}
static int mlx5_health_try_recover(struct mlx5_core_dev *dev)
{
mlx5_core_warn(dev, "handling bad device here\n");
mlx5_handle_bad_state(dev);
if (mlx5_health_wait_pci_up(dev)) {
mlx5_core_err(dev, "health recovery flow aborted, PCI reads still not working\n");
return -EIO;
}
mlx5_core_err(dev, "starting health recovery flow\n");
if (mlx5_recover_device(dev) || mlx5_health_check_fatal_sensors(dev)) {
mlx5_core_err(dev, "health recovery failed\n");
return -EIO;
}
mlx5_core_info(dev, "health recovery succeeded\n");
return 0;
}
static const char *hsynd_str(u8 synd)
{
switch (synd) {
case MLX5_HEALTH_SYNDR_FW_ERR:
return "firmware internal error";
case MLX5_HEALTH_SYNDR_IRISC_ERR:
return "irisc not responding";
case MLX5_HEALTH_SYNDR_HW_UNRECOVERABLE_ERR:
return "unrecoverable hardware error";
case MLX5_HEALTH_SYNDR_CRC_ERR:
return "firmware CRC error";
case MLX5_HEALTH_SYNDR_FETCH_PCI_ERR:
return "ICM fetch PCI error";
case MLX5_HEALTH_SYNDR_HW_FTL_ERR:
return "HW fatal error\n";
case MLX5_HEALTH_SYNDR_ASYNC_EQ_OVERRUN_ERR:
return "async EQ buffer overrun";
case MLX5_HEALTH_SYNDR_EQ_ERR:
return "EQ error";
case MLX5_HEALTH_SYNDR_EQ_INV:
return "Invalid EQ referenced";
case MLX5_HEALTH_SYNDR_FFSER_ERR:
return "FFSER error";
case MLX5_HEALTH_SYNDR_HIGH_TEMP:
return "High temperature";
default:
return "unrecognized error";
}
}
static const char *mlx5_loglevel_str(int level)
{
switch (level) {
case LOGLEVEL_EMERG:
return "EMERGENCY";
case LOGLEVEL_ALERT:
return "ALERT";
case LOGLEVEL_CRIT:
return "CRITICAL";
case LOGLEVEL_ERR:
return "ERROR";
case LOGLEVEL_WARNING:
return "WARNING";
case LOGLEVEL_NOTICE:
return "NOTICE";
case LOGLEVEL_INFO:
return "INFO";
case LOGLEVEL_DEBUG:
return "DEBUG";
}
return "Unknown log level";
}
static int mlx5_health_get_severity(u8 rfr_severity)
{
return rfr_severity & MLX5_SEVERITY_VALID_MASK ?
rfr_severity & MLX5_SEVERITY_MASK : LOGLEVEL_ERR;
}
static void print_health_info(struct mlx5_core_dev *dev)
{
struct mlx5_core_health *health = &dev->priv.health;
struct health_buffer __iomem *h = health->health;
u8 rfr_severity;
int severity;
int i;
/* If the syndrome is 0, the device is OK and no need to print buffer */
if (!ioread8(&h->synd))
return;
rfr_severity = ioread8(&h->rfr_severity);
severity = mlx5_health_get_severity(rfr_severity);
mlx5_log(dev, severity, "Health issue observed, %s, severity(%d) %s:\n",
hsynd_str(ioread8(&h->synd)), severity, mlx5_loglevel_str(severity));
for (i = 0; i < ARRAY_SIZE(h->assert_var); i++)
mlx5_log(dev, severity, "assert_var[%d] 0x%08x\n", i,
ioread32be(h->assert_var + i));
mlx5_log(dev, severity, "assert_exit_ptr 0x%08x\n", ioread32be(&h->assert_exit_ptr));
mlx5_log(dev, severity, "assert_callra 0x%08x\n", ioread32be(&h->assert_callra));
mlx5_log(dev, severity, "fw_ver %d.%d.%d", fw_rev_maj(dev), fw_rev_min(dev),
fw_rev_sub(dev));
mlx5_log(dev, severity, "time %u\n", ioread32be(&h->time));
mlx5_log(dev, severity, "hw_id 0x%08x\n", ioread32be(&h->hw_id));
mlx5_log(dev, severity, "rfr %d\n", mlx5_health_get_rfr(rfr_severity));
mlx5_log(dev, severity, "severity %d (%s)\n", severity, mlx5_loglevel_str(severity));
mlx5_log(dev, severity, "irisc_index %d\n", ioread8(&h->irisc_index));
mlx5_log(dev, severity, "synd 0x%x: %s\n", ioread8(&h->synd),
hsynd_str(ioread8(&h->synd)));
mlx5_log(dev, severity, "ext_synd 0x%04x\n", ioread16be(&h->ext_synd));
mlx5_log(dev, severity, "raw fw_ver 0x%08x\n", ioread32be(&h->fw_ver));
}
static int
mlx5_fw_reporter_diagnose(struct devlink_health_reporter *reporter,
struct devlink_fmsg *fmsg,
struct netlink_ext_ack *extack)
{
struct mlx5_core_dev *dev = devlink_health_reporter_priv(reporter);
struct mlx5_core_health *health = &dev->priv.health;
struct health_buffer __iomem *h = health->health;
u8 synd;
int err;
synd = ioread8(&h->synd);
err = devlink_fmsg_u8_pair_put(fmsg, "Syndrome", synd);
if (err || !synd)
return err;
return devlink_fmsg_string_pair_put(fmsg, "Description", hsynd_str(synd));
}
struct mlx5_fw_reporter_ctx {
u8 err_synd;
int miss_counter;
};
static int
mlx5_fw_reporter_ctx_pairs_put(struct devlink_fmsg *fmsg,
struct mlx5_fw_reporter_ctx *fw_reporter_ctx)
{
int err;
err = devlink_fmsg_u8_pair_put(fmsg, "syndrome",
fw_reporter_ctx->err_synd);
if (err)
return err;
err = devlink_fmsg_u32_pair_put(fmsg, "fw_miss_counter",
fw_reporter_ctx->miss_counter);
if (err)
return err;
return 0;
}
static int
mlx5_fw_reporter_heath_buffer_data_put(struct mlx5_core_dev *dev,
struct devlink_fmsg *fmsg)
{
struct mlx5_core_health *health = &dev->priv.health;
struct health_buffer __iomem *h = health->health;
u8 rfr_severity;
int err;
int i;
if (!ioread8(&h->synd))
return 0;
err = devlink_fmsg_pair_nest_start(fmsg, "health buffer");
if (err)
return err;
err = devlink_fmsg_obj_nest_start(fmsg);
if (err)
return err;
err = devlink_fmsg_arr_pair_nest_start(fmsg, "assert_var");
if (err)
return err;
for (i = 0; i < ARRAY_SIZE(h->assert_var); i++) {
err = devlink_fmsg_u32_put(fmsg, ioread32be(h->assert_var + i));
if (err)
return err;
}
err = devlink_fmsg_arr_pair_nest_end(fmsg);
if (err)
return err;
err = devlink_fmsg_u32_pair_put(fmsg, "assert_exit_ptr",
ioread32be(&h->assert_exit_ptr));
if (err)
return err;
err = devlink_fmsg_u32_pair_put(fmsg, "assert_callra",
ioread32be(&h->assert_callra));
if (err)
return err;
err = devlink_fmsg_u32_pair_put(fmsg, "time", ioread32be(&h->time));
if (err)
return err;
err = devlink_fmsg_u32_pair_put(fmsg, "hw_id", ioread32be(&h->hw_id));
if (err)
return err;
rfr_severity = ioread8(&h->rfr_severity);
err = devlink_fmsg_u8_pair_put(fmsg, "rfr", mlx5_health_get_rfr(rfr_severity));
if (err)
return err;
err = devlink_fmsg_u8_pair_put(fmsg, "severity", mlx5_health_get_severity(rfr_severity));
if (err)
return err;
err = devlink_fmsg_u8_pair_put(fmsg, "irisc_index",
ioread8(&h->irisc_index));
if (err)
return err;
err = devlink_fmsg_u8_pair_put(fmsg, "synd", ioread8(&h->synd));
if (err)
return err;
err = devlink_fmsg_u32_pair_put(fmsg, "ext_synd",
ioread16be(&h->ext_synd));
if (err)
return err;
err = devlink_fmsg_u32_pair_put(fmsg, "raw_fw_ver",
ioread32be(&h->fw_ver));
if (err)
return err;
err = devlink_fmsg_obj_nest_end(fmsg);
if (err)
return err;
return devlink_fmsg_pair_nest_end(fmsg);
}
static int
mlx5_fw_reporter_dump(struct devlink_health_reporter *reporter,
struct devlink_fmsg *fmsg, void *priv_ctx,
struct netlink_ext_ack *extack)
{
struct mlx5_core_dev *dev = devlink_health_reporter_priv(reporter);
int err;
err = mlx5_fw_tracer_trigger_core_dump_general(dev);
if (err)
return err;
if (priv_ctx) {
struct mlx5_fw_reporter_ctx *fw_reporter_ctx = priv_ctx;
err = mlx5_fw_reporter_ctx_pairs_put(fmsg, fw_reporter_ctx);
if (err)
return err;
}
err = mlx5_fw_reporter_heath_buffer_data_put(dev, fmsg);
if (err)
return err;
return mlx5_fw_tracer_get_saved_traces_objects(dev->tracer, fmsg);
}
static void mlx5_fw_reporter_err_work(struct work_struct *work)
{
struct mlx5_fw_reporter_ctx fw_reporter_ctx;
struct mlx5_core_health *health;
health = container_of(work, struct mlx5_core_health, report_work);
if (IS_ERR_OR_NULL(health->fw_reporter))
return;
fw_reporter_ctx.err_synd = health->synd;
fw_reporter_ctx.miss_counter = health->miss_counter;
if (fw_reporter_ctx.err_synd) {
devlink_health_report(health->fw_reporter,
"FW syndrom reported", &fw_reporter_ctx);
return;
}
if (fw_reporter_ctx.miss_counter)
devlink_health_report(health->fw_reporter,
"FW miss counter reported",
&fw_reporter_ctx);
}
static const struct devlink_health_reporter_ops mlx5_fw_reporter_ops = {
.name = "fw",
.diagnose = mlx5_fw_reporter_diagnose,
.dump = mlx5_fw_reporter_dump,
};
static int
mlx5_fw_fatal_reporter_recover(struct devlink_health_reporter *reporter,
void *priv_ctx,
struct netlink_ext_ack *extack)
{
struct mlx5_core_dev *dev = devlink_health_reporter_priv(reporter);
return mlx5_health_try_recover(dev);
}
static int
mlx5_fw_fatal_reporter_dump(struct devlink_health_reporter *reporter,
struct devlink_fmsg *fmsg, void *priv_ctx,
struct netlink_ext_ack *extack)
{
struct mlx5_core_dev *dev = devlink_health_reporter_priv(reporter);
u32 crdump_size = dev->priv.health.crdump_size;
u32 *cr_data;
int err;
if (!mlx5_core_is_pf(dev))
return -EPERM;
cr_data = kvmalloc(crdump_size, GFP_KERNEL);
if (!cr_data)
return -ENOMEM;
err = mlx5_crdump_collect(dev, cr_data);
if (err)
goto free_data;
if (priv_ctx) {
struct mlx5_fw_reporter_ctx *fw_reporter_ctx = priv_ctx;
err = mlx5_fw_reporter_ctx_pairs_put(fmsg, fw_reporter_ctx);
if (err)
goto free_data;
}
err = devlink_fmsg_binary_pair_put(fmsg, "crdump_data", cr_data, crdump_size);
free_data:
kvfree(cr_data);
return err;
}
static void mlx5_fw_fatal_reporter_err_work(struct work_struct *work)
{
struct mlx5_fw_reporter_ctx fw_reporter_ctx;
struct mlx5_core_health *health;
struct mlx5_core_dev *dev;
struct mlx5_priv *priv;
health = container_of(work, struct mlx5_core_health, fatal_report_work);
priv = container_of(health, struct mlx5_priv, health);
dev = container_of(priv, struct mlx5_core_dev, priv);
enter_error_state(dev, false);
if (IS_ERR_OR_NULL(health->fw_fatal_reporter)) {
if (mlx5_health_try_recover(dev))
mlx5_core_err(dev, "health recovery failed\n");
return;
}
fw_reporter_ctx.err_synd = health->synd;
fw_reporter_ctx.miss_counter = health->miss_counter;
if (devlink_health_report(health->fw_fatal_reporter,
"FW fatal error reported", &fw_reporter_ctx) == -ECANCELED) {
/* If recovery wasn't performed, due to grace period,
* unload the driver. This ensures that the driver
* closes all its resources and it is not subjected to
* requests from the kernel.
*/
mlx5_core_err(dev, "Driver is in error state. Unloading\n");
mlx5_unload_one(dev);
}
}
static const struct devlink_health_reporter_ops mlx5_fw_fatal_reporter_ops = {
.name = "fw_fatal",
.recover = mlx5_fw_fatal_reporter_recover,
.dump = mlx5_fw_fatal_reporter_dump,
};
#define MLX5_REPORTER_FW_GRACEFUL_PERIOD 1200000
static void mlx5_fw_reporters_create(struct mlx5_core_dev *dev)
{
struct mlx5_core_health *health = &dev->priv.health;
struct devlink *devlink = priv_to_devlink(dev);
health->fw_reporter =
devlink_health_reporter_create(devlink, &mlx5_fw_reporter_ops,
0, dev);
if (IS_ERR(health->fw_reporter))
mlx5_core_warn(dev, "Failed to create fw reporter, err = %ld\n",
PTR_ERR(health->fw_reporter));
health->fw_fatal_reporter =
devlink_health_reporter_create(devlink,
&mlx5_fw_fatal_reporter_ops,
MLX5_REPORTER_FW_GRACEFUL_PERIOD,
dev);
if (IS_ERR(health->fw_fatal_reporter))
mlx5_core_warn(dev, "Failed to create fw fatal reporter, err = %ld\n",
PTR_ERR(health->fw_fatal_reporter));
}
static void mlx5_fw_reporters_destroy(struct mlx5_core_dev *dev)
{
struct mlx5_core_health *health = &dev->priv.health;
if (!IS_ERR_OR_NULL(health->fw_reporter))
devlink_health_reporter_destroy(health->fw_reporter);
if (!IS_ERR_OR_NULL(health->fw_fatal_reporter))
devlink_health_reporter_destroy(health->fw_fatal_reporter);
}
static unsigned long get_next_poll_jiffies(struct mlx5_core_dev *dev)
{
unsigned long next;
get_random_bytes(&next, sizeof(next));
next %= HZ;
next += jiffies + msecs_to_jiffies(mlx5_tout_ms(dev, HEALTH_POLL_INTERVAL));
return next;
}
void mlx5_trigger_health_work(struct mlx5_core_dev *dev)
{
struct mlx5_core_health *health = &dev->priv.health;
unsigned long flags;
spin_lock_irqsave(&health->wq_lock, flags);
if (!test_bit(MLX5_DROP_NEW_HEALTH_WORK, &health->flags))
queue_work(health->wq, &health->fatal_report_work);
else
mlx5_core_err(dev, "new health works are not permitted at this stage\n");
spin_unlock_irqrestore(&health->wq_lock, flags);
}
#define MLX5_MSEC_PER_HOUR (MSEC_PER_SEC * 60 * 60)
static void mlx5_health_log_ts_update(struct work_struct *work)
{
struct delayed_work *dwork = to_delayed_work(work);
u32 out[MLX5_ST_SZ_DW(mrtc_reg)] = {};
u32 in[MLX5_ST_SZ_DW(mrtc_reg)] = {};
struct mlx5_core_health *health;
struct mlx5_core_dev *dev;
struct mlx5_priv *priv;
u64 now_us;
health = container_of(dwork, struct mlx5_core_health, update_fw_log_ts_work);
priv = container_of(health, struct mlx5_priv, health);
dev = container_of(priv, struct mlx5_core_dev, priv);
now_us = ktime_to_us(ktime_get_real());
MLX5_SET(mrtc_reg, in, time_h, now_us >> 32);
MLX5_SET(mrtc_reg, in, time_l, now_us & 0xFFFFFFFF);
mlx5_core_access_reg(dev, in, sizeof(in), out, sizeof(out), MLX5_REG_MRTC, 0, 1);
queue_delayed_work(health->wq, &health->update_fw_log_ts_work,
msecs_to_jiffies(MLX5_MSEC_PER_HOUR));
}
static void poll_health(struct timer_list *t)
{
struct mlx5_core_dev *dev = from_timer(dev, t, priv.health.timer);
struct mlx5_core_health *health = &dev->priv.health;
struct health_buffer __iomem *h = health->health;
u32 fatal_error;
u8 prev_synd;
u32 count;
if (dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR)
goto out;
fatal_error = mlx5_health_check_fatal_sensors(dev);
if (fatal_error && !health->fatal_error) {
mlx5_core_err(dev, "Fatal error %u detected\n", fatal_error);
dev->priv.health.fatal_error = fatal_error;
print_health_info(dev);
dev->state = MLX5_DEVICE_STATE_INTERNAL_ERROR;
mlx5_trigger_health_work(dev);
return;
}
count = ioread32be(health->health_counter);
if (count == health->prev)
++health->miss_counter;
else
health->miss_counter = 0;
health->prev = count;
if (health->miss_counter == MAX_MISSES) {
mlx5_core_err(dev, "device's health compromised - reached miss count\n");
print_health_info(dev);
queue_work(health->wq, &health->report_work);
}
prev_synd = health->synd;
health->synd = ioread8(&h->synd);
if (health->synd && health->synd != prev_synd)
queue_work(health->wq, &health->report_work);
out:
mod_timer(&health->timer, get_next_poll_jiffies(dev));
}
void mlx5_start_health_poll(struct mlx5_core_dev *dev)
{
u64 poll_interval_ms = mlx5_tout_ms(dev, HEALTH_POLL_INTERVAL);
struct mlx5_core_health *health = &dev->priv.health;
timer_setup(&health->timer, poll_health, 0);
health->fatal_error = MLX5_SENSOR_NO_ERR;
clear_bit(MLX5_DROP_NEW_HEALTH_WORK, &health->flags);
health->health = &dev->iseg->health;
health->health_counter = &dev->iseg->health_counter;
health->timer.expires = jiffies + msecs_to_jiffies(poll_interval_ms);
add_timer(&health->timer);
if (mlx5_core_is_pf(dev) && MLX5_CAP_MCAM_REG(dev, mrtc))
queue_delayed_work(health->wq, &health->update_fw_log_ts_work, 0);
}
void mlx5_stop_health_poll(struct mlx5_core_dev *dev, bool disable_health)
{
struct mlx5_core_health *health = &dev->priv.health;
unsigned long flags;
if (disable_health) {
spin_lock_irqsave(&health->wq_lock, flags);
set_bit(MLX5_DROP_NEW_HEALTH_WORK, &health->flags);
spin_unlock_irqrestore(&health->wq_lock, flags);
}
del_timer_sync(&health->timer);
}
void mlx5_drain_health_wq(struct mlx5_core_dev *dev)
{
struct mlx5_core_health *health = &dev->priv.health;
unsigned long flags;
spin_lock_irqsave(&health->wq_lock, flags);
set_bit(MLX5_DROP_NEW_HEALTH_WORK, &health->flags);
spin_unlock_irqrestore(&health->wq_lock, flags);
cancel_delayed_work_sync(&health->update_fw_log_ts_work);
cancel_work_sync(&health->report_work);
cancel_work_sync(&health->fatal_report_work);
}
void mlx5_health_flush(struct mlx5_core_dev *dev)
{
struct mlx5_core_health *health = &dev->priv.health;
flush_workqueue(health->wq);
}
void mlx5_health_cleanup(struct mlx5_core_dev *dev)
{
struct mlx5_core_health *health = &dev->priv.health;
cancel_delayed_work_sync(&health->update_fw_log_ts_work);
destroy_workqueue(health->wq);
mlx5_fw_reporters_destroy(dev);
}
int mlx5_health_init(struct mlx5_core_dev *dev)
{
struct mlx5_core_health *health;
char *name;
mlx5_fw_reporters_create(dev);
health = &dev->priv.health;
name = kmalloc(64, GFP_KERNEL);
if (!name)
goto out_err;
strcpy(name, "mlx5_health");
strcat(name, dev_name(dev->device));
health->wq = create_singlethread_workqueue(name);
kfree(name);
if (!health->wq)
goto out_err;
spin_lock_init(&health->wq_lock);
INIT_WORK(&health->fatal_report_work, mlx5_fw_fatal_reporter_err_work);
INIT_WORK(&health->report_work, mlx5_fw_reporter_err_work);
INIT_DELAYED_WORK(&health->update_fw_log_ts_work, mlx5_health_log_ts_update);
return 0;
out_err:
mlx5_fw_reporters_destroy(dev);
return -ENOMEM;
}