1 /*- 2 * Copyright (c) 2016 Alexander Motin <mav@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 struct ntb_transport_qp; 30 31 extern devclass_t ntb_transport_devclass; 32 33 enum ntb_link_event { 34 NTB_LINK_DOWN = 0, 35 NTB_LINK_UP, 36 }; 37 38 struct ntb_queue_handlers { 39 void (*rx_handler)(struct ntb_transport_qp *qp, void *qp_data, 40 void *data, int len); 41 void (*tx_handler)(struct ntb_transport_qp *qp, void *qp_data, 42 void *data, int len); 43 void (*event_handler)(void *data, enum ntb_link_event status); 44 }; 45 46 int ntb_transport_queue_count(device_t dev); 47 struct ntb_transport_qp * 48 ntb_transport_create_queue(device_t dev, int q, 49 const struct ntb_queue_handlers *handlers, void *data); 50 void ntb_transport_free_queue(struct ntb_transport_qp *qp); 51 unsigned char ntb_transport_qp_num(struct ntb_transport_qp *qp); 52 unsigned int ntb_transport_max_size(struct ntb_transport_qp *qp); 53 int ntb_transport_rx_enqueue(struct ntb_transport_qp *qp, void *cb, void *data, 54 unsigned int len); 55 int ntb_transport_tx_enqueue(struct ntb_transport_qp *qp, void *cb, void *data, 56 unsigned int len); 57 void *ntb_transport_rx_remove(struct ntb_transport_qp *qp, unsigned int *len); 58 void ntb_transport_link_up(struct ntb_transport_qp *qp); 59 void ntb_transport_link_down(struct ntb_transport_qp *qp); 60 bool ntb_transport_link_query(struct ntb_transport_qp *qp); 61 unsigned int ntb_transport_tx_free_entry(struct ntb_transport_qp *qp); 62