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rte_event_crypto_adapter.h(3) DPDK rte_event_crypto_adapter.h(3)

NAME

rte_event_crypto_adapter.h

SYNOPSIS

#include <stdint.h>
#include 'rte_eventdev.h'

Data Structures


struct rte_event_crypto_request
union rte_event_crypto_metadata
struct rte_event_crypto_adapter_conf
struct rte_event_crypto_adapter_runtime_params
struct rte_event_crypto_adapter_queue_conf
struct rte_event_crypto_adapter_vector_limits
struct rte_event_crypto_adapter_stats

Macros


#define RTE_EVENT_CRYPTO_ADAPTER_EVENT_VECTOR 0x1

Typedefs


typedef int(* rte_event_crypto_adapter_conf_cb) (uint8_t id, uint8_t dev_id, struct rte_event_crypto_adapter_conf *conf, void *arg)

Enumerations


enum rte_event_crypto_adapter_mode { RTE_EVENT_CRYPTO_ADAPTER_OP_NEW, RTE_EVENT_CRYPTO_ADAPTER_OP_FORWARD }

Functions


int rte_event_crypto_adapter_create_ext (uint8_t id, uint8_t dev_id, rte_event_crypto_adapter_conf_cb conf_cb, enum rte_event_crypto_adapter_mode mode, void *conf_arg)
int rte_event_crypto_adapter_create (uint8_t id, uint8_t dev_id, struct rte_event_port_conf *port_config, enum rte_event_crypto_adapter_mode mode)
int rte_event_crypto_adapter_free (uint8_t id)
int rte_event_crypto_adapter_queue_pair_add (uint8_t id, uint8_t cdev_id, int32_t queue_pair_id, const struct rte_event_crypto_adapter_queue_conf *conf)
int rte_event_crypto_adapter_queue_pair_del (uint8_t id, uint8_t cdev_id, int32_t queue_pair_id)
int rte_event_crypto_adapter_start (uint8_t id)
int rte_event_crypto_adapter_stop (uint8_t id)
int rte_event_crypto_adapter_stats_get (uint8_t id, struct rte_event_crypto_adapter_stats *stats)
int rte_event_crypto_adapter_stats_reset (uint8_t id)
int rte_event_crypto_adapter_service_id_get (uint8_t id, uint32_t *service_id)
int rte_event_crypto_adapter_event_port_get (uint8_t id, uint8_t *event_port_id)
__rte_experimental int rte_event_crypto_adapter_runtime_params_init (struct rte_event_crypto_adapter_runtime_params *params)
__rte_experimental int rte_event_crypto_adapter_runtime_params_set (uint8_t id, struct rte_event_crypto_adapter_runtime_params *params)
__rte_experimental int rte_event_crypto_adapter_runtime_params_get (uint8_t id, struct rte_event_crypto_adapter_runtime_params *params)
int rte_event_crypto_adapter_vector_limits_get (uint8_t dev_id, uint16_t cdev_id, struct rte_event_crypto_adapter_vector_limits *limits)
static uint16_t rte_event_crypto_adapter_enqueue (uint8_t dev_id, uint8_t port_id, struct rte_event ev[], uint16_t nb_events)

Detailed Description

RTE Event crypto adapter

Eventdev library provides couple of adapters to bridge between various components for providing new event source. The event crypto adapter is one of those adapters which is intended to bridge between event devices and crypto devices.

The crypto adapter adds support to enqueue/dequeue crypto operations to/ from event device. The packet flow between crypto device and the event device can be accomplished using both SW and HW based transfer mechanisms. The adapter uses an EAL service core function for SW based packet transfer and uses the eventdev PMD functions to configure HW based packet transfer between the crypto device and the event device.

The application can choose to submit a crypto operation directly to crypto device or send it to the crypto adapter via eventdev based on RTE_EVENT_CRYPTO_ADAPTER_CAP_INTERNAL_PORT_OP_FWD capability. The first mode is known as the event new(RTE_EVENT_CRYPTO_ADAPTER_OP_NEW) mode and the second as the event forward(RTE_EVENT_CRYPTO_ADAPTER_OP_FORWARD) mode. The choice of mode can be specified while creating the adapter. In the former mode, it is an application responsibility to enable ingress packet ordering. In the latter mode, it is the adapter responsibility to enable the ingress packet ordering.

Working model of RTE_EVENT_CRYPTO_ADAPTER_OP_NEW mode:



           +--------------+         +--------------+


           |              |         | Crypto stage |


           | Application  |---[2]-->| + enqueue to |


           |              |         |   cryptodev  |


           +--------------+         +--------------+


               ^   ^                       |


               |   |                      [3]


              [6] [1]                      |


               |   |                       |


           +--------------+                |


           |              |                |


           | Event device |                |


           |              |                |


           +--------------+                |


                  ^                        |


                  |                        |


                 [5]                       |


                  |                        v


           +--------------+         +--------------+


           |              |         |              |


           |Crypto adapter|<--[4]---|  Cryptodev   |


           |              |         |              |


           +--------------+         +--------------+


    [1] Application dequeues events from the previous stage.


    [2] Application prepares the crypto operations.


    [3] Crypto operations are submitted to cryptodev by application.


    [4] Crypto adapter dequeues crypto completions from cryptodev.


    [5] Crypto adapter enqueues events to the eventdev.


    [6] Application dequeues from eventdev and prepare for further


        processing.

In the RTE_EVENT_CRYPTO_ADAPTER_OP_NEW mode, application submits crypto operations directly to crypto device. The adapter then dequeues crypto completions from crypto device and enqueue events to the event device. This mode does not ensure ingress ordering, if the application directly enqueues to cryptodev without going through crypto/atomic stage i.e. removing item [1] and [2]. Events dequeued from the adapter will be treated as new events. In this mode, application needs to specify event information (response information) which is needed to enqueue an event after the crypto operation is completed.

Working model of RTE_EVENT_CRYPTO_ADAPTER_OP_FORWARD mode:



           +--------------+         +--------------+


   --[1]-->|              |---[2]-->|  Application |


           | Event device |         |      in      |


   <--[8]--|              |<--[3]---| Ordered stage|


           +--------------+         +--------------+


               ^      |


               |     [4]


              [7]     |


               |      v


          +----------------+       +--------------+


          |                |--[5]->|              |


          | Crypto adapter |       |   Cryptodev  |


          |                |<-[6]--|              |


          +----------------+       +--------------+


    [1] Events from the previous stage.


    [2] Application in ordered stage dequeues events from eventdev.


    [3] Application enqueues crypto operations as events to eventdev.


    [4] Crypto adapter dequeues event from eventdev.


    [5] Crypto adapter submits crypto operations to cryptodev


        (Atomic stage).


    [6] Crypto adapter dequeues crypto completions from cryptodev


    [7] Crypto adapter enqueues events to the eventdev


    [8] Events to the next stage

In the RTE_EVENT_CRYPTO_ADAPTER_OP_FORWARD mode, if HW supports RTE_EVENT_CRYPTO_ADAPTER_CAP_INTERNAL_PORT_OP_FWD capability the application can directly submit the crypto operations to the cryptodev. If not, application retrieves crypto adapter's event port using rte_event_crypto_adapter_event_port_get() API. Then, links its event queue to this port and starts enqueuing crypto operations as events to the eventdev. The adapter then dequeues the events and submits the crypto operations to the cryptodev. After the crypto completions, the adapter enqueues events to the event device. Application can use this mode, when ingress packet ordering is needed. Events dequeued from the adapter will be treated as forwarded events. In this mode, the application needs to specify the cryptodev ID and queue pair ID (request information) needed to enqueue a crypto operation in addition to the event information (response information) needed to enqueue an event after the crypto operation has completed.

The event crypto adapter provides common APIs to configure the packet flow from the crypto device to event devices for both SW and HW based transfers. The crypto event adapter's functions are:

  • rte_event_crypto_adapter_create_ext()
  • rte_event_crypto_adapter_create()
  • rte_event_crypto_adapter_free()
  • rte_event_crypto_adapter_queue_pair_add()
  • rte_event_crypto_adapter_queue_pair_del()
  • rte_event_crypto_adapter_start()
  • rte_event_crypto_adapter_stop()
  • rte_event_crypto_adapter_stats_get()
  • rte_event_crypto_adapter_stats_reset()
  • rte_event_crypto_adapter_runtime_params_get()
  • rte_event_crypto_adapter_runtime_params_init()
  • rte_event_crypto_adapter_runtime_params_set()

The application creates an instance using rte_event_crypto_adapter_create() or rte_event_crypto_adapter_create_ext().

Cryptodev queue pair addition/deletion is done using the rte_event_crypto_adapter_queue_pair_xxx() APIs. If HW supports RTE_EVENT_CRYPTO_ADAPTER_CAP_INTERNAL_PORT_QP_EV_BIND capability, event information must be passed to the add API.

The SW adapter or HW PMD uses rte_crypto_op::sess_type to decide whether request/response(private) data is located in the crypto/security session or at an offset in the rte_crypto_op.

For session-based operations, the set and get API provides a mechanism for an application to store and retrieve the data information stored along with the crypto session. The RTE_EVENT_CRYPTO_ADAPTER_CAP_SESSION_PRIVATE_DATA capability indicates whether HW or SW supports this feature.

For session-less mode, the adapter gets the private data information placed along with the struct rte_crypto_op. The rte_crypto_op::private_data_offset provides an offset to locate the request/response information in the rte_crypto_op. This offset is counted from the start of the rte_crypto_op including initialization vector (IV).

Definition in file rte_event_crypto_adapter.h.

Macro Definition Documentation

#define RTE_EVENT_CRYPTO_ADAPTER_EVENT_VECTOR 0x1

This flag indicates that crypto operations processed on the crypto adapter need to be vectorized

See also:

rte_event_crypto_adapter_queue_conf::flags

Definition at line 284 of file rte_event_crypto_adapter.h.

Typedef Documentation

typedef int(* rte_event_crypto_adapter_conf_cb) (uint8_t id, uint8_t dev_id, struct rte_event_crypto_adapter_conf *conf, void *arg)

Function type used for adapter configuration callback. The callback is used to fill in members of the struct rte_event_crypto_adapter_conf, this callback is invoked when creating a SW service for packet transfer from cryptodev queue pair to the event device. The SW service is created within the rte_event_crypto_adapter_queue_pair_add() function if SW based packet transfers from cryptodev queue pair to the event device are required.

Parameters:

id Adapter identifier.
dev_id Event device identifier.
conf Structure that needs to be populated by this callback.
arg Argument to the callback. This is the same as the conf_arg passed to the rte_event_crypto_adapter_create_ext().

Definition at line 377 of file rte_event_crypto_adapter.h.

Enumeration Type Documentation

enum rte_event_crypto_adapter_mode

Crypto event adapter mode

Enumerator

Start the crypto adapter in event new mode.

See also:

RTE_EVENT_OP_NEW. Application submits crypto operations to the cryptodev. Adapter only dequeues the crypto completions from cryptodev and enqueue events to the eventdev.
Start the crypto adapter in event forward mode.

See also:

RTE_EVENT_OP_FORWARD. Application submits crypto requests as events to the crypto adapter or crypto device based on RTE_EVENT_CRYPTO_ADAPTER_CAP_INTERNAL_PORT_OP_FWD capability. Crypto completions are enqueued back to the eventdev by crypto adapter.

Definition at line 181 of file rte_event_crypto_adapter.h.

Function Documentation

int rte_event_crypto_adapter_create_ext (uint8_t id, uint8_t dev_id, rte_event_crypto_adapter_conf_cb conf_cb, enum rte_event_crypto_adapter_mode mode, void * conf_arg)

Create a new event crypto adapter with the specified identifier.

Parameters:

id Adapter identifier.
dev_id Event device identifier.
conf_cb Callback function that fills in members of a struct rte_event_crypto_adapter_conf struct passed into it.
mode Flag to indicate the mode of the adapter.

See also:

rte_event_crypto_adapter_mode

Parameters:

conf_arg Argument that is passed to the conf_cb function.

Returns:

  • 0: Success
  • <0: Error code on failure

int rte_event_crypto_adapter_create (uint8_t id, uint8_t dev_id, struct rte_event_port_conf * port_config, enum rte_event_crypto_adapter_mode mode)

Create a new event crypto adapter with the specified identifier. This function uses an internal configuration function that creates an event port. This default function reconfigures the event device with an additional event port and set up the event port using the port_config parameter passed into this function. In case the application needs more control in configuration of the service, it should use the rte_event_crypto_adapter_create_ext() version.

When this API is used for creating adapter instance, rte_event_dev_config::nb_event_ports is automatically incremented, and the event device is reconfigured with additional event port during service initialization. This event device reconfigure logic also increments the rte_event_dev_config::nb_single_link_event_port_queues parameter if the adapter event port config is of type RTE_EVENT_PORT_CFG_SINGLE_LINK.

Application no longer needs to account for rte_event_dev_config::nb_event_ports and rte_event_dev_config::nb_single_link_event_port_queues parameters required for crypto adapter in event device configuration when the adapter is created with this API.

Parameters:

id Adapter identifier.
dev_id Event device identifier.
port_config Argument of type rte_event_port_conf that is passed to the conf_cb function.
mode Flag to indicate the mode of the adapter.

See also:

rte_event_crypto_adapter_mode

Returns:

  • 0: Success
  • <0: Error code on failure

int rte_event_crypto_adapter_free (uint8_t id)

Free an event crypto adapter

Parameters:

id Adapter identifier.

Returns:

  • 0: Success
  • <0: Error code on failure, If the adapter still has queue pairs added to it, the function returns -EBUSY.

int rte_event_crypto_adapter_queue_pair_add (uint8_t id, uint8_t cdev_id, int32_t queue_pair_id, const struct rte_event_crypto_adapter_queue_conf * conf)

Add a queue pair to an event crypto adapter.

Parameters:

id Adapter identifier.
cdev_id Cryptodev identifier.
queue_pair_id Cryptodev queue pair identifier. If queue_pair_id is set -1, adapter adds all the pre configured queue pairs to the instance.
conf Additional configuration structure of type rte_event_crypto_adapter_queue_conf

Returns:

  • 0: Success, queue pair added correctly.
  • <0: Error code on failure.

int rte_event_crypto_adapter_queue_pair_del (uint8_t id, uint8_t cdev_id, int32_t queue_pair_id)

Delete a queue pair from an event crypto adapter.

Parameters:

id Adapter identifier.
cdev_id Cryptodev identifier.
queue_pair_id Cryptodev queue pair identifier.

Returns:

  • 0: Success, queue pair deleted successfully.
  • <0: Error code on failure.

int rte_event_crypto_adapter_start (uint8_t id)

Start event crypto adapter

Parameters:

id Adapter identifier.

Returns:

  • 0: Success, adapter started successfully.
  • <0: Error code on failure.

Note:

The eventdev and cryptodev to which the event_crypto_adapter is connected needs to be started before calling rte_event_crypto_adapter_start().

int rte_event_crypto_adapter_stop (uint8_t id)

Stop event crypto adapter

Parameters:

id Adapter identifier.

Returns:

  • 0: Success, adapter stopped successfully.
  • <0: Error code on failure.

int rte_event_crypto_adapter_stats_get (uint8_t id, struct rte_event_crypto_adapter_stats * stats)

Retrieve statistics for an adapter

Parameters:

id Adapter identifier.
stats A pointer to structure used to retrieve statistics for an adapter.

Returns:

  • 0: Success, retrieved successfully.
  • <0: Error code on failure.

int rte_event_crypto_adapter_stats_reset (uint8_t id)

Reset statistics for an adapter.

Parameters:

id Adapter identifier.

Returns:

  • 0: Success, statistics reset successfully.
  • <0: Error code on failure.

int rte_event_crypto_adapter_service_id_get (uint8_t id, uint32_t * service_id)

Retrieve the service ID of an adapter. If the adapter doesn't use a rte_service function, this function returns -ESRCH.

Parameters:

id Adapter identifier.
service_id A pointer to a uint32_t, to be filled in with the service id.

Returns:

  • 0: Success
  • <0: Error code on failure, if the adapter doesn't use a rte_service function, this function returns -ESRCH.

int rte_event_crypto_adapter_event_port_get (uint8_t id, uint8_t * event_port_id)

Retrieve the event port of an adapter.

Parameters:

id Adapter identifier.
event_port_id Application links its event queue to this adapter port which is used in RTE_EVENT_CRYPTO_ADAPTER_OP_FORWARD mode.

Returns:

  • 0: Success
  • <0: Error code on failure.

__rte_experimental int rte_event_crypto_adapter_runtime_params_init (struct rte_event_crypto_adapter_runtime_params * params)

Initialize the adapter runtime configuration parameters

Parameters:

params A pointer to structure of type struct rte_event_crypto_adapter_runtime_params

Returns:

  • 0: Success
  • <0: Error code on failure

__rte_experimental int rte_event_crypto_adapter_runtime_params_set (uint8_t id, struct rte_event_crypto_adapter_runtime_params * params)

Set the adapter runtime configuration parameters

Parameters:

id Adapter identifier
params A pointer to structure of type struct rte_event_crypto_adapter_runtime_params with configuration parameter values. The reserved fields of this structure must be initialized to zero and the valid fields need to be set appropriately. This struct can be initialized using rte_event_crypto_adapter_runtime_params_init() API to default values or application may reset this struct and update required fields.

Returns:

  • 0: Success
  • <0: Error code on failure

__rte_experimental int rte_event_crypto_adapter_runtime_params_get (uint8_t id, struct rte_event_crypto_adapter_runtime_params * params)

Get the adapter runtime configuration parameters

Parameters:

id Adapter identifier
params A pointer to structure of type struct rte_event_crypto_adapter_runtime_params containing valid adapter parameters when return value is 0.

Returns:

  • 0: Success
  • <0: Error code on failure

int rte_event_crypto_adapter_vector_limits_get (uint8_t dev_id, uint16_t cdev_id, struct rte_event_crypto_adapter_vector_limits * limits)

Retrieve vector limits for a given event dev and crypto dev pair.

See also:

rte_event_crypto_adapter_vector_limits

Parameters:

dev_id Event device identifier.
cdev_id Crypto device identifier.
limits A pointer to rte_event_crypto_adapter_vector_limits structure that has to be filled.

Returns:

  • 0: Success.
  • <0: Error code on failure.

static uint16_t rte_event_crypto_adapter_enqueue (uint8_t dev_id, uint8_t port_id, struct rte_event ev[], uint16_t nb_events) [inline], [static]

Enqueue a burst of crypto operations as event objects supplied in rte_event structure on an event crypto adapter designated by its event dev_id through the event port specified by port_id. This function is supported if the eventdev PMD has the RTE_EVENT_CRYPTO_ADAPTER_CAP_INTERNAL_PORT_OP_FWD capability flag set.

The nb_events parameter is the number of event objects to enqueue which are supplied in the ev array of rte_event structure.

The rte_event_crypto_adapter_enqueue() function returns the number of event objects it actually enqueued. A return value equal to nb_events means that all event objects have been enqueued.

Parameters:

dev_id The identifier of the device.
port_id The identifier of the event port.
ev Points to an array of nb_events objects of type rte_event structure which contain the event object enqueue operations to be processed.
nb_events The number of event objects to enqueue, typically number of rte_event_port_attr_get(...RTE_EVENT_PORT_ATTR_ENQ_DEPTH...) available for this port.

Returns:

The number of event objects actually enqueued on the event device. The return value can be less than the value of the nb_events parameter when the event devices queue is full or if invalid parameters are specified in a rte_event. If the return value is less than nb_events, the remaining events at the end of ev[] are not consumed and the caller has to take care of them, and rte_errno is set accordingly. Possible errno values include:
  • EINVAL The port ID is invalid, device ID is invalid, an event's queue ID is invalid, or an event's sched type doesn't match the capabilities of the destination queue.
  • ENOSPC The event port was backpressured and unable to enqueue one or more events. This error code is only applicable to closed systems.

Definition at line 757 of file rte_event_crypto_adapter.h.

Author

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