qat_polling.h

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/*****************************************************************************
 * @file qat_polling.h
 *
 * This file provides an interface for polling in QAT engine
 *
 *****************************************************************************/

#ifndef QAT_POLLING_H
# define QAT_POLLING_H

# include "cpa.h"
# include "cpa_types.h"

# include <sys/epoll.h>

# define MAX_EVENTS 32

/* Globals */
typedef struct {
    int eng_fd;
    int inst_index;
} ENGINE_EPOLL_ST;

extern struct epoll_event eng_epoll_events[QAT_MAX_CRYPTO_INSTANCES];
extern int internal_efd;
extern ENGINE_EPOLL_ST eng_poll_st[QAT_MAX_CRYPTO_INSTANCES];

int getQatMsgRetryCount();
useconds_t getQatPollInterval();
int getEnableInlinePolling();
/******************************************************************************
 * function:
 *         int qat_create_thread(pthread_t *pThreadId,
 *                               const pthread_attr_t *attr,
 *                               void *(*start_func) (void *), void *pArg)
 *
 * @param pThreadId  [OUT] - Pointer to Thread ID
 * @param start_func [IN]  - Pointer to Thread Start routine
 * @param attr       [IN]  - Pointer to Thread attributes
 * @param pArg       [IN]  - Arguments to start routine
 *
 * description:
 *   Wrapper function for pthread_create
 ******************************************************************************/
int qat_create_thread(pthread_t *pThreadId, const pthread_attr_t *attr,
                      void *(*start_func) (void *), void *pArg);

/******************************************************************************
 * function:
 *         int qat_join_thread(pthread_t threadId, void **retval)
 *
 * @param pThreadId  [IN ] - Thread ID of the created thread
 * @param retval     [OUT] - Pointer that contains thread's exit status
 *
 * description:
 *   Wrapper function for pthread_create
 ******************************************************************************/
int qat_join_thread(pthread_t threadId, void **retval);


/******************************************************************************
 * function:
 *         int qat_adjust_thread_affinity(pthread_t threadptr);
 *
 * @param threadptr[IN ] - Thread ID
 *
 * description:
 *    Sets the CPU affinity mask using pthread_setaffinity_np
 *    and returns the CPU affinity mask using pthread_getaffinity_np
 ******************************************************************************/
int qat_adjust_thread_affinity(pthread_t threadptr);

/******************************************************************************
 * function:
 *         void *timer_poll_func(void *ih)
 *
 * @param ih [IN] - NULL
 *
 * description:
 *   Poll the QAT instances (nanosleep version)
 *     NB: Delay in this function is set by default at runtime by an engine
 *     specific message. If not set then the default is QAT_POLL_PERIOD_IN_NS.
 *     This function uses pthread signals to wait for a signal
 *     that there is traffic to process and therefore that QAT engine polling
 *     needs to be started/resumed.
 *
 ******************************************************************************/
void *timer_poll_func(void *ih);

void *event_poll_func(void *ih);
CpaStatus poll_instances(void);

#endif   /* QAT_POLLING_H */