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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _RTE_INTERRUPTS_H_
#error "don't include this file directly, please include generic <rte_interrupts.h>"
#endif
#ifndef _RTE_BSDAPP_INTERRUPTS_H_
#define _RTE_BSDAPP_INTERRUPTS_H_
#define RTE_INTR_VEC_ZERO_OFFSET 0
#define RTE_INTR_VEC_RXTX_OFFSET 1
#define RTE_MAX_RXTX_INTR_VEC_ID 32
enum rte_intr_handle_type {
RTE_INTR_HANDLE_UNKNOWN = 0,
RTE_INTR_HANDLE_UIO, /**< uio device handle */
RTE_INTR_HANDLE_ALARM, /**< alarm handle */
RTE_INTR_HANDLE_MAX
};
/** Handle for interrupts. */
struct rte_intr_handle {
int fd; /**< file descriptor */
int uio_cfg_fd; /**< UIO config file descriptor */
enum rte_intr_handle_type type; /**< handle type */
int max_intr; /**< max interrupt requested */
uint32_t nb_efd; /**< number of available efds */
int *intr_vec; /**< intr vector number array */
};
/**
* @param intr_handle
* Pointer to the interrupt handle.
* @param epfd
* Epoll instance fd which the intr vector associated to.
* @param op
* The operation be performed for the vector.
* Operation type of {ADD, DEL}.
* @param vec
* RX intr vector number added to the epoll instance wait list.
* @param data
* User raw data.
* @return
* - On success, zero.
* - On failure, a negative value.
*/
int
rte_intr_rx_ctl(struct rte_intr_handle *intr_handle,
int epfd, int op, unsigned int vec, void *data);
/**
* It enables the fastpath event fds if it's necessary.
* It creates event fds when multi-vectors allowed,
* otherwise it multiplexes the single event fds.
*
* @param intr_handle
* Pointer to the interrupt handle.
* @param nb_efd
* Number of interrupt vector trying to enable.
* The value 0 is not allowed.
* @return
* - On success, zero.
* - On failure, a negative value.
*/
int
rte_intr_efd_enable(struct rte_intr_handle *intr_handle, uint32_t nb_efd);
/**
* It disable the fastpath event fds.
* It deletes registered eventfds and closes the open fds.
*
* @param intr_handle
* Pointer to the interrupt handle.
*/
void
rte_intr_efd_disable(struct rte_intr_handle *intr_handle);
/**
* The fastpath interrupt is enabled or not.
*
* @param intr_handle
* Pointer to the interrupt handle.
*/
int rte_intr_dp_is_en(struct rte_intr_handle *intr_handle);
/**
* The interrupt handle instance allows other cause or not.
* Other cause stands for none fastpath interrupt.
*
* @param intr_handle
* Pointer to the interrupt handle.
*/
int rte_intr_allow_others(struct rte_intr_handle *intr_handle);
/**
* The multiple interrupt vector capability of interrupt handle instance.
* It returns zero if no multiple interrupt vector support.
*
* @param intr_handle
* Pointer to the interrupt handle.
*/
int
rte_intr_cap_multiple(struct rte_intr_handle *intr_handle);
#endif /* _RTE_BSDAPP_INTERRUPTS_H_ */
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