DPDK  20.11.3
Data Structures | Typedefs | Enumerations | Functions
rte_event_crypto_adapter.h File Reference
#include <stdint.h>
#include "rte_eventdev.h"

Go to the source code of this file.

Data Structures

struct  rte_event_crypto_request
 
union  rte_event_crypto_metadata
 
struct  rte_event_crypto_adapter_conf
 
struct  rte_event_crypto_adapter_stats
 

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 *event)
 
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)
 

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:

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.

Typedef Documentation

◆ rte_event_crypto_adapter_conf_cb

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
idAdapter identifier.
dev_idEvent device identifier.
confStructure that needs to be populated by this callback.
argArgument to the callback. This is the same as the conf_arg passed to the rte_event_crypto_adapter_create_ext().

Definition at line 276 of file rte_event_crypto_adapter.h.

Enumeration Type Documentation

◆ rte_event_crypto_adapter_mode

Crypto event adapter mode

Enumerator
RTE_EVENT_CRYPTO_ADAPTER_OP_NEW 

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.
RTE_EVENT_CRYPTO_ADAPTER_OP_FORWARD 

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 178 of file rte_event_crypto_adapter.h.

Function Documentation

◆ rte_event_crypto_adapter_create_ext()

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
idAdapter identifier.
dev_idEvent device identifier.
conf_cbCallback function that fills in members of a struct rte_event_crypto_adapter_conf struct passed into it.
modeFlag to indicate the mode of the adapter.
See also
rte_event_crypto_adapter_mode
Parameters
conf_argArgument that is passed to the conf_cb function.
Returns
  • 0: Success
  • <0: Error code on failure

◆ rte_event_crypto_adapter_create()

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.

Parameters
idAdapter identifier.
dev_idEvent device identifier.
port_configArgument of type rte_event_port_conf that is passed to the conf_cb function.
modeFlag to indicate the mode of the adapter.
See also
rte_event_crypto_adapter_mode
Returns
  • 0: Success
  • <0: Error code on failure

◆ rte_event_crypto_adapter_free()

int rte_event_crypto_adapter_free ( uint8_t  id)

Free an event crypto adapter

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

◆ rte_event_crypto_adapter_queue_pair_add()

int rte_event_crypto_adapter_queue_pair_add ( uint8_t  id,
uint8_t  cdev_id,
int32_t  queue_pair_id,
const struct rte_event event 
)

Add a queue pair to an event crypto adapter.

Parameters
idAdapter identifier.
cdev_idCryptodev identifier.
queue_pair_idCryptodev queue pair identifier. If queue_pair_id is set -1, adapter adds all the pre configured queue pairs to the instance.
eventif HW supports cryptodev queue pair to event queue binding, application is expected to fill in event information, else it will be NULL.
See also
RTE_EVENT_CRYPTO_ADAPTER_CAP_INTERNAL_PORT_QP_EV_BIND
Returns
  • 0: Success, queue pair added correctly.
  • <0: Error code on failure.

◆ rte_event_crypto_adapter_queue_pair_del()

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
idAdapter identifier.
cdev_idCryptodev identifier.
queue_pair_idCryptodev queue pair identifier.
Returns
  • 0: Success, queue pair deleted successfully.
  • <0: Error code on failure.

◆ rte_event_crypto_adapter_start()

int rte_event_crypto_adapter_start ( uint8_t  id)

Start event crypto adapter

Parameters
idAdapter identifier.
Returns
  • 0: Success, adapter started successfully.
  • <0: Error code on failure.
Note
The eventdev to which the event_crypto_adapter is connected needs to be started before calling rte_event_crypto_adapter_start().

◆ rte_event_crypto_adapter_stop()

int rte_event_crypto_adapter_stop ( uint8_t  id)

Stop event crypto adapter

Parameters
idAdapter identifier.
Returns
  • 0: Success, adapter stopped successfully.
  • <0: Error code on failure.

◆ rte_event_crypto_adapter_stats_get()

int rte_event_crypto_adapter_stats_get ( uint8_t  id,
struct rte_event_crypto_adapter_stats stats 
)

Retrieve statistics for an adapter

Parameters
idAdapter identifier.
[out]statsA pointer to structure used to retrieve statistics for an adapter.
Returns
  • 0: Success, retrieved successfully.
  • <0: Error code on failure.

◆ rte_event_crypto_adapter_stats_reset()

int rte_event_crypto_adapter_stats_reset ( uint8_t  id)

Reset statistics for an adapter.

Parameters
idAdapter identifier.
Returns
  • 0: Success, statistics reset successfully.
  • <0: Error code on failure.

◆ rte_event_crypto_adapter_service_id_get()

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
idAdapter identifier.
[out]service_idA 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.

◆ rte_event_crypto_adapter_event_port_get()

int rte_event_crypto_adapter_event_port_get ( uint8_t  id,
uint8_t *  event_port_id 
)

Retrieve the event port of an adapter.

Parameters
idAdapter identifier.
[out]event_port_idApplication 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.