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/*-
* BSD LICENSE
*
* Copyright (c) 2015 CESNET
* 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 CESNET 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_PMD_SZEDATA2_H_
#define RTE_PMD_SZEDATA2_H_
/* szedata2_packet header length == 4 bytes == 2B segment size + 2B hw size */
#define RTE_SZE2_PACKET_HEADER_SIZE 4
#define RTE_SZE2_MMIO_MAX 10
/*!
* Round 'what' to the nearest larger (or equal) multiple of '8'
* (szedata2 packet is aligned to 8 bytes)
*/
#define RTE_SZE2_ALIGN8(what) (((what) + ((8) - 1)) & (~((8) - 1)))
/*! main handle structure */
struct szedata {
int fd;
struct sze2_instance_info *info;
uint32_t *write_size;
void *space[RTE_SZE2_MMIO_MAX];
struct szedata_lock lock[2][2];
__u32 *rx_asize, *tx_asize;
/* szedata_read_next variables - to keep context (ct) */
/*
* rx
*/
/** initial sze lock ptr */
const struct szedata_lock *ct_rx_lck_orig;
/** current sze lock ptr (initial or next) */
const struct szedata_lock *ct_rx_lck;
/** remaining bytes (not read) within current lock */
unsigned int ct_rx_rem_bytes;
/** current pointer to locked memory */
unsigned char *ct_rx_cur_ptr;
/**
* allocated buffer to store RX packet if it was split
* into 2 buffers
*/
unsigned char *ct_rx_buffer;
/** registered function to provide filtering based on hwdata */
int (*ct_rx_filter)(u_int16_t hwdata_len, u_char *hwdata);
/*
* tx
*/
/**
* buffer for tx - packet is prepared here
* (in future for burst write)
*/
unsigned char *ct_tx_buffer;
/** initial sze TX lock ptrs - number according to TX interfaces */
const struct szedata_lock **ct_tx_lck_orig;
/** current sze TX lock ptrs - number according to TX interfaces */
const struct szedata_lock **ct_tx_lck;
/** already written bytes in both locks */
unsigned int *ct_tx_written_bytes;
/** remaining bytes (not written) within current lock */
unsigned int *ct_tx_rem_bytes;
/** current pointers to locked memory */
unsigned char **ct_tx_cur_ptr;
/** NUMA node closest to PCIe device, or -1 */
int numa_node;
};
#endif
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