// 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 *);
static int pcie_core(struct notifier_block *, unsigned long, void *);
/* handler which forwards the event to events->fw_nh, driver notifiers */
static int forward_event(struct notifier_block *, unsigned long, void *);
static struct mlx5_nb events_nbs_ref[] = {
/* Events to be processed 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 },
{.nb.notifier_call = pcie_core, .event_type = MLX5_EVENT_TYPE_GENERAL_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 },
{.nb.notifier_call = forward_event, .event_type = MLX5_EVENT_TYPE_OBJECT_CHANGE },
/* 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 workqueue_struct *wq;
struct mlx5_event_nb notifiers[ARRAY_SIZE(events_nbs_ref)];
/* driver notifier chain for fw events */
struct atomic_notifier_head fw_nh;
/* port module events stats */
struct mlx5_pme_stats pme_stats;
/*pcie_core*/
struct work_struct pcie_core_work;
/* driver notifier chain for sw events */
struct blocking_notifier_head sw_nh;
};
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_ESW_FUNCTIONS_CHANGED:
return "MLX5_EVENT_TYPE_ESW_FUNCTIONS_CHANGED";
case MLX5_EVENT_TYPE_VHCA_STATE_CHANGE:
return "MLX5_EVENT_TYPE_VHCA_STATE_CHANGE";
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_MONITOR_COUNTER:
return "MLX5_EVENT_TYPE_MONITOR_COUNTER";
case MLX5_EVENT_TYPE_DEVICE_TRACER:
return "MLX5_EVENT_TYPE_DEVICE_TRACER";
case MLX5_EVENT_TYPE_OBJECT_CHANGE:
return "MLX5_EVENT_TYPE_OBJECT_CHANGE";
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_to_string(enum port_module_event_status_type status)
{
switch (status) {
case MLX5_MODULE_STATUS_PLUGGED:
return "Cable plugged";
case MLX5_MODULE_STATUS_UNPLUGGED:
return "Cable unplugged";
case MLX5_MODULE_STATUS_ERROR:
return "Cable error";
case MLX5_MODULE_STATUS_DISABLED:
return "Cable disabled";
default:
return "Unknown status";
}
}
static const char *mlx5_pme_error_to_string(enum port_module_event_error_type error)
{
switch (error) {
case MLX5_MODULE_EVENT_ERROR_POWER_BUDGET_EXCEEDED:
return "Power budget exceeded";
case MLX5_MODULE_EVENT_ERROR_LONG_RANGE_FOR_NON_MLNX:
return "Long Range for non MLNX cable";
case MLX5_MODULE_EVENT_ERROR_BUS_STUCK:
return "Bus stuck (I2C or data shorted)";
case MLX5_MODULE_EVENT_ERROR_NO_EEPROM_RETRY_TIMEOUT:
return "No EEPROM/retry timeout";
case MLX5_MODULE_EVENT_ERROR_ENFORCE_PART_NUMBER_LIST:
return "Enforce part number list";
case MLX5_MODULE_EVENT_ERROR_UNKNOWN_IDENTIFIER:
return "Unknown identifier";
case MLX5_MODULE_EVENT_ERROR_HIGH_TEMPERATURE:
return "High Temperature";
case MLX5_MODULE_EVENT_ERROR_BAD_CABLE:
return "Bad or shorted cable/module";
case MLX5_MODULE_EVENT_ERROR_PCIE_POWER_SLOT_EXCEEDED:
return "One or more network ports have been powered down due to insufficient/unadvertised power on the PCIe slot";
default:
return "Unknown error";
}
}
/* 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;
const char *status_str;
u8 module_num;
module_event_eqe = &eqe->data.port_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_NUM)
events->pme_stats.status_counters[module_status]++;
if (module_status == MLX5_MODULE_STATUS_ERROR)
if (error_type < MLX5_MODULE_EVENT_ERROR_NUM)
events->pme_stats.error_counters[error_type]++;
if (!printk_ratelimit())
return NOTIFY_OK;
module_num = module_event_eqe->module;
status_str = mlx5_pme_status_to_string(module_status);
if (module_status == MLX5_MODULE_STATUS_ERROR) {
const char *error_str = mlx5_pme_error_to_string(error_type);
mlx5_core_err(events->dev,
"Port module event[error]: module %u, %s, %s\n",
module_num, status_str, error_str);
} else {
mlx5_core_info(events->dev,
"Port module event: module %u, %s\n",
module_num, status_str);
}
return NOTIFY_OK;
}
enum {
MLX5_PCI_POWER_COULD_NOT_BE_READ = 0x0,
MLX5_PCI_POWER_SUFFICIENT_REPORTED = 0x1,
MLX5_PCI_POWER_INSUFFICIENT_REPORTED = 0x2,
};
static void mlx5_pcie_event(struct work_struct *work)
{
u32 out[MLX5_ST_SZ_DW(mpein_reg)] = {0};
u32 in[MLX5_ST_SZ_DW(mpein_reg)] = {0};
struct mlx5_events *events;
struct mlx5_core_dev *dev;
u8 power_status;
u16 pci_power;
events = container_of(work, struct mlx5_events, pcie_core_work);
dev = events->dev;
if (!MLX5_CAP_MCAM_FEATURE(dev, pci_status_and_power))
return;
mlx5_core_access_reg(dev, in, sizeof(in), out, sizeof(out),
MLX5_REG_MPEIN, 0, 0);
power_status = MLX5_GET(mpein_reg, out, pwr_status);
pci_power = MLX5_GET(mpein_reg, out, pci_power);
switch (power_status) {
case MLX5_PCI_POWER_COULD_NOT_BE_READ:
mlx5_core_info_rl(dev,
"PCIe slot power capability was not advertised.\n");
break;
case MLX5_PCI_POWER_INSUFFICIENT_REPORTED:
mlx5_core_warn_rl(dev,
"Detected insufficient power on the PCIe slot (%uW).\n",
pci_power);
break;
case MLX5_PCI_POWER_SUFFICIENT_REPORTED:
mlx5_core_info_rl(dev,
"PCIe slot advertised sufficient power (%uW).\n",
pci_power);
break;
}
}
static int pcie_core(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;
switch (eqe->sub_type) {
case MLX5_GENERAL_SUBTYPE_PCI_POWER_CHANGE_EVENT:
queue_work(events->wq, &events->pcie_core_work);
break;
default:
return NOTIFY_DONE;
}
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->fw_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->fw_nh);
events->dev = dev;
dev->priv.events = events;
events->wq = create_singlethread_workqueue("mlx5_events");
if (!events->wq) {
kfree(events);
return -ENOMEM;
}
INIT_WORK(&events->pcie_core_work, mlx5_pcie_event);
BLOCKING_INIT_NOTIFIER_HEAD(&events->sw_nh);
return 0;
}
void mlx5_events_cleanup(struct mlx5_core_dev *dev)
{
destroy_workqueue(dev->priv.events->wq);
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);
flush_workqueue(events->wq);
}
/* This API is used only for processing and forwarding firmware
* events to mlx5 consumer.
*/
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->fw_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->fw_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->fw_nh, event, data);
}
/* This API is used only for processing and forwarding driver-specific
* events to mlx5 consumers.
*/
int mlx5_blocking_notifier_register(struct mlx5_core_dev *dev, struct notifier_block *nb)
{
struct mlx5_events *events = dev->priv.events;
return blocking_notifier_chain_register(&events->sw_nh, nb);
}
EXPORT_SYMBOL(mlx5_blocking_notifier_register);
int mlx5_blocking_notifier_unregister(struct mlx5_core_dev *dev, struct notifier_block *nb)
{
struct mlx5_events *events = dev->priv.events;
return blocking_notifier_chain_unregister(&events->sw_nh, nb);
}
EXPORT_SYMBOL(mlx5_blocking_notifier_unregister);
int mlx5_blocking_notifier_call_chain(struct mlx5_core_dev *dev, unsigned int event,
void *data)
{
struct mlx5_events *events = dev->priv.events;
return blocking_notifier_call_chain(&events->sw_nh, event, data);
}
void mlx5_events_work_enqueue(struct mlx5_core_dev *dev, struct work_struct *work)
{
queue_work(dev->priv.events->wq, work);
}
