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rte_pmd_mlx5.h(3) DPDK rte_pmd_mlx5.h(3)

NAME

rte_pmd_mlx5.h

SYNOPSIS

#include <rte_compat.h>

Macros


#define RTE_PMD_MLX5_DOMAIN_BIT_NIC_RX (1 << 0)
#define RTE_PMD_MLX5_DOMAIN_BIT_NIC_TX (1 << 1)
#define RTE_PMD_MLX5_DOMAIN_BIT_FDB (1 << 2)
#define RTE_PMD_MLX5_EXTERNAL_RX_QUEUE_ID_MIN (UINT16_MAX - 1000 + 1)
#define RTE_PMD_MLX5_LINEAR_HASH_TAG_INDEX 255
#define RTE_PMD_MLX5_HOST_SHAPER_FLAG_AVAIL_THRESH_TRIGGERED 0
#define RTE_PMD_MLX5_FLOW_ENGINE_FLAG_STANDBY_DUP_INGRESS RTE_BIT32(0)

Functions


__rte_experimental int rte_pmd_mlx5_get_dyn_flag_names (char *names[], unsigned int n)
__rte_experimental int rte_pmd_mlx5_sync_flow (uint16_t port_id, uint32_t domains)
__rte_experimental int rte_pmd_mlx5_external_rx_queue_id_map (uint16_t port_id, uint16_t dpdk_idx, uint32_t hw_idx)
__rte_experimental int rte_pmd_mlx5_external_rx_queue_id_unmap (uint16_t port_id, uint16_t dpdk_idx)
__rte_experimental int rte_pmd_mlx5_host_shaper_config (int port_id, uint8_t rate, uint32_t flags)
__rte_experimental int rte_pmd_mlx5_external_sq_enable (uint16_t port_id, uint32_t sq_num)
__rte_experimental int rte_pmd_mlx5_flow_engine_set_mode (enum rte_pmd_mlx5_flow_engine_mode mode, uint32_t flags)

Detailed Description

MLX5 public header.

This interface provides the ability to support private PMD dynamic flags.

Definition in file rte_pmd_mlx5.h.

Macro Definition Documentation

#define RTE_PMD_MLX5_DOMAIN_BIT_NIC_RX (1 << 0)

NIC RX domain bit mask.

Definition at line 41 of file rte_pmd_mlx5.h.

#define RTE_PMD_MLX5_DOMAIN_BIT_NIC_TX (1 << 1)

NIC TX domain bit mask.

Definition at line 42 of file rte_pmd_mlx5.h.

#define RTE_PMD_MLX5_DOMAIN_BIT_FDB (1 << 2)

FDB (TX + RX) domain bit mask.

Definition at line 43 of file rte_pmd_mlx5.h.

#define RTE_PMD_MLX5_EXTERNAL_RX_QUEUE_ID_MIN (UINT16_MAX - 1000 + 1)

External Rx queue rte_flow index minimal value.

Definition at line 69 of file rte_pmd_mlx5.h.

#define RTE_PMD_MLX5_LINEAR_HASH_TAG_INDEX 255

Tag level to set the linear hash index.

Definition at line 74 of file rte_pmd_mlx5.h.

#define RTE_PMD_MLX5_HOST_SHAPER_FLAG_AVAIL_THRESH_TRIGGERED 0

The rate of the host port shaper will be updated directly at the next available descriptor threshold event to the rate that comes with this flag set; set rate 0 to disable this rate update. Unset this flag to update the rate of the host port shaper directly in the API call; use rate 0 to disable the current shaper.

Definition at line 126 of file rte_pmd_mlx5.h.

#define RTE_PMD_MLX5_FLOW_ENGINE_FLAG_STANDBY_DUP_INGRESS RTE_BIT32(0)

When set on the flow engine of a standby process, ingress flow rules will be effective in active and standby processes, so the ingress traffic may be duplicated.

Definition at line 176 of file rte_pmd_mlx5.h.

Function Documentation

__rte_experimental int rte_pmd_mlx5_get_dyn_flag_names (char * names[], unsigned int n)

Returns the dynamic flags name, that are supported.

Parameters

names Array that is used to return the supported dynamic flags names.
n The number of elements in the names array.

Returns

The number of dynamic flags that were copied if not negative. Otherwise:
  • ENOMEM - not enough entries in the array
  • EINVAL - invalid array entry

__rte_experimental int rte_pmd_mlx5_sync_flow (uint16_t port_id, uint32_t domains)

Synchronize the flows to make them take effort on hardware. It only supports DR flows now. For DV and Verbs flows, there is no need to call this function, and a success will return directly in case of Verbs.

Parameters

port_id The port identifier of the Ethernet device.
domains Refer to '/usr/include/infiniband/mlx5dv.h'. Bitmask of domains in which the synchronization will be done. RTE_PMD_MLX5_DOMAIN_BIT_* macros are used to specify the domains. An ADD or OR operation could be used to synchronize flows in more than one domain per call.

Returns

  • (0) if successful.
  • Negative value if an error.

__rte_experimental int rte_pmd_mlx5_external_rx_queue_id_map (uint16_t port_id, uint16_t dpdk_idx, uint32_t hw_idx)

Update mapping between rte_flow queue index (16 bits) and HW queue index (32 bits) for RxQs which is created outside the PMD.

Parameters

port_id The port identifier of the Ethernet device.
dpdk_idx Queue index in rte_flow.
hw_idx Queue index in hardware.

Returns

0 on success, a negative errno value otherwise and rte_errno is set. Possible values for rte_errno:
  • EEXIST - a mapping with the same rte_flow index already exists.
  • EINVAL - invalid rte_flow index, out of range.
  • ENODEV - there is no Ethernet device for this port id.
  • ENOTSUP - the port doesn't support external RxQ.

__rte_experimental int rte_pmd_mlx5_external_rx_queue_id_unmap (uint16_t port_id, uint16_t dpdk_idx)

Remove mapping between rte_flow queue index (16 bits) and HW queue index (32 bits) for RxQs which is created outside the PMD.

Parameters

port_id The port identifier of the Ethernet device.
dpdk_idx Queue index in rte_flow.

Returns

0 on success, a negative errno value otherwise and rte_errno is set. Possible values for rte_errno:
  • EINVAL - invalid index, out of range, still referenced or doesn't exist.
  • ENODEV - there is no Ethernet device for this port id.
  • ENOTSUP - the port doesn't support external RxQ.

__rte_experimental int rte_pmd_mlx5_host_shaper_config (int port_id, uint8_t rate, uint32_t flags)

Configure a HW shaper to limit Tx rate for a host port. The configuration will affect all the ethdev ports belonging to the same rte_device.

Parameters

port_id The port identifier of the Ethernet device.
rate Unit is 100Mbps, setting the rate to 0 disables the shaper.
flags Host shaper flags (see RTE_PMD_MLX5_HOST_SHAPER_FLAG_*).

Returns

0 : operation success. Otherwise:
  • ENOENT - no ibdev interface.
  • EBUSY - the register access unit is busy.
  • EIO - the register access command meets IO error.

__rte_experimental int rte_pmd_mlx5_external_sq_enable (uint16_t port_id, uint32_t sq_num)

Enable traffic for external SQ.

Parameters

port_id The port identifier of the Ethernet device.
sq_num SQ HW number.

Returns

0 on success, a negative errno value otherwise and rte_errno is set. Possible values for rte_errno:
  • EINVAL - invalid sq_number or port type.
  • ENODEV - there is no Ethernet device for this port id.

__rte_experimental int rte_pmd_mlx5_flow_engine_set_mode (enum rte_pmd_mlx5_flow_engine_mode mode, uint32_t flags)

Warning

EXPERIMENTAL: this API may change without prior notice

Set the flow engine mode of the process to active or standby, affecting network traffic handling.

If one device does not support this operation or fails, the whole operation is failed and rolled back.

It is forbidden to have multiple flow engines with the same mode unless only one of them is configured to handle the traffic.

The application's flow engine is active by default. The configuration from the active flow engine is effective immediately while the configuration from the standby flow engine is queued by hardware. When configuring the device from a standby flow engine, it has no effect except for below situations:

  • traffic not handled by the active flow engine configuration
  • no active flow engine

When flow engine of a process is changed from a standby to an active mode, all preceding configurations that are queued by hardware should become effective immediately. Before mode transition, all the traffic handling configurations set by the active flow engine should be flushed first.

In summary, the operations are expected to happen in this order in 'old' and 'new' applications: device: already configured by the old application new: start as active new: probe the same device new: set as standby new: configure the device device: has configurations from old and new applications old: clear its device configuration device: has only 1 configuration from new application new: set as active device: downtime for connecting all to the new application old: shutdown

Parameters

mode The desired mode (see rte_pmd_mlx5_flow_engine_mode).
flags Mode specific flags (see RTE_PMD_MLX5_FLOW_ENGINE_FLAG_*).

Returns

Positive value on success, -rte_errno value on error:
  • (> 0) Number of switched devices.
  • (-EINVAL) if error happen and rollback internally.
  • (-EPERM) if operation failed and can't recover.

Author

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Fri Dec 15 2023 Version 23.11.0