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// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
// Copyright (c) 2018 Mellanox Technologies
#include <linux/mlx5/driver.h>
#include "mlx5_core.h"
#include "lib/eq.h"
#include "lib/mlx5.h"
struct mlx5_event_nb {
struct mlx5_nb nb;
void *ctx;
};
/* General events handlers for the low level mlx5_core driver
*
* Other Major feature specific events such as
* clock/eswitch/fpga/FW trace and many others, are handled elsewhere, with
* separate notifiers callbacks, specifically by those mlx5 components.
*/
static int any_notifier(struct notifier_block *, unsigned long, void *);
static int temp_warn(struct notifier_block *, unsigned long, void *);
static int port_module(struct notifier_block *, unsigned long, void *);
/* handler which forwards the event to events->nh, driver notifiers */
static int forward_event(struct notifier_block *, unsigned long, void *);
static struct mlx5_nb events_nbs_ref[] = {
/* Events to be proccessed by mlx5_core */
{.nb.notifier_call = any_notifier, .event_type = MLX5_EVENT_TYPE_NOTIFY_ANY },
{.nb.notifier_call = temp_warn, .event_type = MLX5_EVENT_TYPE_TEMP_WARN_EVENT },
{.nb.notifier_call = port_module, .event_type = MLX5_EVENT_TYPE_PORT_MODULE_EVENT },
/* Events to be forwarded (as is) to mlx5 core interfaces (mlx5e/mlx5_ib) */
{.nb.notifier_call = forward_event, .event_type = MLX5_EVENT_TYPE_PORT_CHANGE },
{.nb.notifier_call = forward_event, .event_type = MLX5_EVENT_TYPE_GENERAL_EVENT },
/* QP/WQ resource events to forward */
{.nb.notifier_call = forward_event, .event_type = MLX5_EVENT_TYPE_DCT_DRAINED },
{.nb.notifier_call = forward_event, .event_type = MLX5_EVENT_TYPE_PATH_MIG },
{.nb.notifier_call = forward_event, .event_type = MLX5_EVENT_TYPE_COMM_EST },
{.nb.notifier_call = forward_event, .event_type = MLX5_EVENT_TYPE_SQ_DRAINED },
{.nb.notifier_call = forward_event, .event_type = MLX5_EVENT_TYPE_SRQ_LAST_WQE },
{.nb.notifier_call = forward_event, .event_type = MLX5_EVENT_TYPE_WQ_CATAS_ERROR },
{.nb.notifier_call = forward_event, .event_type = MLX5_EVENT_TYPE_PATH_MIG_FAILED },
{.nb.notifier_call = forward_event, .event_type = MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR },
{.nb.notifier_call = forward_event, .event_type = MLX5_EVENT_TYPE_WQ_ACCESS_ERROR },
/* SRQ events */
{.nb.notifier_call = forward_event, .event_type = MLX5_EVENT_TYPE_SRQ_CATAS_ERROR },
{.nb.notifier_call = forward_event, .event_type = MLX5_EVENT_TYPE_SRQ_RQ_LIMIT },
};
struct mlx5_events {
struct mlx5_core_dev *dev;
struct mlx5_event_nb notifiers[ARRAY_SIZE(events_nbs_ref)];
/* driver notifier chain */
struct atomic_notifier_head nh;
/* port module events stats */
struct mlx5_pme_stats pme_stats;
};
static const char *eqe_type_str(u8 type)
{
switch (type) {
case MLX5_EVENT_TYPE_COMP:
return "MLX5_EVENT_TYPE_COMP";
case MLX5_EVENT_TYPE_PATH_MIG:
return "MLX5_EVENT_TYPE_PATH_MIG";
case MLX5_EVENT_TYPE_COMM_EST:
return "MLX5_EVENT_TYPE_COMM_EST";
case MLX5_EVENT_TYPE_SQ_DRAINED:
return "MLX5_EVENT_TYPE_SQ_DRAINED";
case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
return "MLX5_EVENT_TYPE_SRQ_LAST_WQE";
case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
return "MLX5_EVENT_TYPE_SRQ_RQ_LIMIT";
case MLX5_EVENT_TYPE_CQ_ERROR:
return "MLX5_EVENT_TYPE_CQ_ERROR";
case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
return "MLX5_EVENT_TYPE_WQ_CATAS_ERROR";
case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
return "MLX5_EVENT_TYPE_PATH_MIG_FAILED";
case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
return "MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR";
case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
return "MLX5_EVENT_TYPE_WQ_ACCESS_ERROR";
case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
return "MLX5_EVENT_TYPE_SRQ_CATAS_ERROR";
case MLX5_EVENT_TYPE_INTERNAL_ERROR:
return "MLX5_EVENT_TYPE_INTERNAL_ERROR";
case MLX5_EVENT_TYPE_PORT_CHANGE:
return "MLX5_EVENT_TYPE_PORT_CHANGE";
case MLX5_EVENT_TYPE_GPIO_EVENT:
return "MLX5_EVENT_TYPE_GPIO_EVENT";
case MLX5_EVENT_TYPE_PORT_MODULE_EVENT:
return "MLX5_EVENT_TYPE_PORT_MODULE_EVENT";
case MLX5_EVENT_TYPE_TEMP_WARN_EVENT:
return "MLX5_EVENT_TYPE_TEMP_WARN_EVENT";
case MLX5_EVENT_TYPE_REMOTE_CONFIG:
return "MLX5_EVENT_TYPE_REMOTE_CONFIG";
case MLX5_EVENT_TYPE_DB_BF_CONGESTION:
return "MLX5_EVENT_TYPE_DB_BF_CONGESTION";
case MLX5_EVENT_TYPE_STALL_EVENT:
return "MLX5_EVENT_TYPE_STALL_EVENT";
case MLX5_EVENT_TYPE_CMD:
return "MLX5_EVENT_TYPE_CMD";
case MLX5_EVENT_TYPE_PAGE_REQUEST:
return "MLX5_EVENT_TYPE_PAGE_REQUEST";
case MLX5_EVENT_TYPE_PAGE_FAULT:
return "MLX5_EVENT_TYPE_PAGE_FAULT";
case MLX5_EVENT_TYPE_PPS_EVENT:
return "MLX5_EVENT_TYPE_PPS_EVENT";
case MLX5_EVENT_TYPE_NIC_VPORT_CHANGE:
return "MLX5_EVENT_TYPE_NIC_VPORT_CHANGE";
case MLX5_EVENT_TYPE_FPGA_ERROR:
return "MLX5_EVENT_TYPE_FPGA_ERROR";
case MLX5_EVENT_TYPE_FPGA_QP_ERROR:
return "MLX5_EVENT_TYPE_FPGA_QP_ERROR";
case MLX5_EVENT_TYPE_GENERAL_EVENT:
return "MLX5_EVENT_TYPE_GENERAL_EVENT";
case MLX5_EVENT_TYPE_DEVICE_TRACER:
return "MLX5_EVENT_TYPE_DEVICE_TRACER";
default:
return "Unrecognized event";
}
}
/* handles all FW events, type == eqe->type */
static int any_notifier(struct notifier_block *nb,
unsigned long type, void *data)
{
struct mlx5_event_nb *event_nb = mlx5_nb_cof(nb, struct mlx5_event_nb, nb);
struct mlx5_events *events = event_nb->ctx;
struct mlx5_eqe *eqe = data;
mlx5_core_dbg(events->dev, "Async eqe type %s, subtype (%d)\n",
eqe_type_str(eqe->type), eqe->sub_type);
return NOTIFY_OK;
}
/* type == MLX5_EVENT_TYPE_TEMP_WARN_EVENT */
static int temp_warn(struct notifier_block *nb, unsigned long type, void *data)
{
struct mlx5_event_nb *event_nb = mlx5_nb_cof(nb, struct mlx5_event_nb, nb);
struct mlx5_events *events = event_nb->ctx;
struct mlx5_eqe *eqe = data;
u64 value_lsb;
u64 value_msb;
value_lsb = be64_to_cpu(eqe->data.temp_warning.sensor_warning_lsb);
value_msb = be64_to_cpu(eqe->data.temp_warning.sensor_warning_msb);
mlx5_core_warn(events->dev,
"High temperature on sensors with bit set %llx %llx",
value_msb, value_lsb);
return NOTIFY_OK;
}
/* MLX5_EVENT_TYPE_PORT_MODULE_EVENT */
static const char *mlx5_pme_status[MLX5_MODULE_STATUS_NUM] = {
"Cable plugged", /* MLX5_MODULE_STATUS_PLUGGED = 0x1 */
"Cable unplugged", /* MLX5_MODULE_STATUS_UNPLUGGED = 0x2 */
"Cable error", /* MLX5_MODULE_STATUS_ERROR = 0x3 */
};
static const char *mlx5_pme_error[MLX5_MODULE_EVENT_ERROR_NUM] = {
"Power budget exceeded",
"Long Range for non MLNX cable",
"Bus stuck(I2C or data shorted)",
"No EEPROM/retry timeout",
"Enforce part number list",
"Unknown identifier",
"High Temperature",
"Bad or shorted cable/module",
"Unknown status",
};
/* type == MLX5_EVENT_TYPE_PORT_MODULE_EVENT */
static int port_module(struct notifier_block *nb, unsigned long type, void *data)
{
struct mlx5_event_nb *event_nb = mlx5_nb_cof(nb, struct mlx5_event_nb, nb);
struct mlx5_events *events = event_nb->ctx;
struct mlx5_eqe *eqe = data;
enum port_module_event_status_type module_status;
enum port_module_event_error_type error_type;
struct mlx5_eqe_port_module *module_event_eqe;
u8 module_num;
module_event_eqe = &eqe->data.port_module;
module_num = module_event_eqe->module;
module_status = module_event_eqe->module_status &
PORT_MODULE_EVENT_MODULE_STATUS_MASK;
error_type = module_event_eqe->error_type &
PORT_MODULE_EVENT_ERROR_TYPE_MASK;
if (module_status < MLX5_MODULE_STATUS_ERROR) {
events->pme_stats.status_counters[module_status - 1]++;
} else if (module_status == MLX5_MODULE_STATUS_ERROR) {
if (error_type >= MLX5_MODULE_EVENT_ERROR_UNKNOWN)
/* Unknown error type */
error_type = MLX5_MODULE_EVENT_ERROR_UNKNOWN;
events->pme_stats.error_counters[error_type]++;
}
if (!printk_ratelimit())
return NOTIFY_OK;
if (module_status < MLX5_MODULE_STATUS_ERROR)
mlx5_core_info(events->dev,
"Port module event: module %u, %s\n",
module_num, mlx5_pme_status[module_status - 1]);
else if (module_status == MLX5_MODULE_STATUS_ERROR)
mlx5_core_info(events->dev,
"Port module event[error]: module %u, %s, %s\n",
module_num, mlx5_pme_status[module_status - 1],
mlx5_pme_error[error_type]);
return NOTIFY_OK;
}
void mlx5_get_pme_stats(struct mlx5_core_dev *dev, struct mlx5_pme_stats *stats)
{
*stats = dev->priv.events->pme_stats;
}
/* forward event as is to registered interfaces (mlx5e/mlx5_ib) */
static int forward_event(struct notifier_block *nb, unsigned long event, void *data)
{
struct mlx5_event_nb *event_nb = mlx5_nb_cof(nb, struct mlx5_event_nb, nb);
struct mlx5_events *events = event_nb->ctx;
struct mlx5_eqe *eqe = data;
mlx5_core_dbg(events->dev, "Async eqe type %s, subtype (%d) forward to interfaces\n",
eqe_type_str(eqe->type), eqe->sub_type);
atomic_notifier_call_chain(&events->nh, event, data);
return NOTIFY_OK;
}
int mlx5_events_init(struct mlx5_core_dev *dev)
{
struct mlx5_events *events = kzalloc(sizeof(*events), GFP_KERNEL);
if (!events)
return -ENOMEM;
ATOMIC_INIT_NOTIFIER_HEAD(&events->nh);
events->dev = dev;
dev->priv.events = events;
return 0;
}
void mlx5_events_cleanup(struct mlx5_core_dev *dev)
{
kvfree(dev->priv.events);
}
void mlx5_events_start(struct mlx5_core_dev *dev)
{
struct mlx5_events *events = dev->priv.events;
int i;
for (i = 0; i < ARRAY_SIZE(events_nbs_ref); i++) {
events->notifiers[i].nb = events_nbs_ref[i];
events->notifiers[i].ctx = events;
mlx5_eq_notifier_register(dev, &events->notifiers[i].nb);
}
}
void mlx5_events_stop(struct mlx5_core_dev *dev)
{
struct mlx5_events *events = dev->priv.events;
int i;
for (i = ARRAY_SIZE(events_nbs_ref) - 1; i >= 0 ; i--)
mlx5_eq_notifier_unregister(dev, &events->notifiers[i].nb);
}
int mlx5_notifier_register(struct mlx5_core_dev *dev, struct notifier_block *nb)
{
struct mlx5_events *events = dev->priv.events;
return atomic_notifier_chain_register(&events->nh, nb);
}
EXPORT_SYMBOL(mlx5_notifier_register);
int mlx5_notifier_unregister(struct mlx5_core_dev *dev, struct notifier_block *nb)
{
struct mlx5_events *events = dev->priv.events;
return atomic_notifier_chain_unregister(&events->nh, nb);
}
EXPORT_SYMBOL(mlx5_notifier_unregister);
int mlx5_notifier_call_chain(struct mlx5_events *events, unsigned int event, void *data)
{
return atomic_notifier_call_chain(&events->nh, event, data);
}
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