1 /* 2 * Copyright (c) 2014-2016, Cisco Systems, Inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 26 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 27 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 29 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 30 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 31 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 33 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 34 * POSSIBILITY OF SUCH DAMAGE. 35 */ 36 #ifndef _USDF_CQ_H_ 37 #define _USDF_CQ_H_ 38 39 /* exponential backoff settings for fi_cq_sread */ 40 #define SREAD_EXP_BASE 2 41 #define SREAD_INIT_SLEEP_TIME_US 1 42 #define SREAD_MAX_SLEEP_TIME_US 5000 43 44 int usdf_cq_make_soft(struct usdf_cq *cq); 45 int usdf_cq_create_cq(struct usdf_cq *cq, struct usd_cq **ucq, int create_fd); 46 int usdf_check_empty_hard_cq(struct usdf_cq *cq); 47 int usdf_check_empty_soft_cq(struct usdf_cq *cq); 48 int usdf_cq_trywait(struct fid *fcq); 49 50 void usdf_progress_hard_cq(struct usdf_cq_hard *hcq); 51 52 void usdf_cq_post_soft(struct usdf_cq_hard *hcq, void *context, 53 size_t len, int prov_errno, uint64_t flags); 54 55 #endif /* _USDF_CQ_H_ */ 56