1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2021 Adrian Chadd <adrian@FreeBSD.org>. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice unmodified, this list of conditions, and the following 11 * disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 * 30 */ 31 32 #ifndef __QCOM_ESS_EDMA_DESC_H__ 33 #define __QCOM_ESS_EDMA_DESC_H__ 34 35 extern int qcom_ess_edma_desc_ring_setup(struct qcom_ess_edma_softc *sc, 36 struct qcom_ess_edma_desc_ring *ring, 37 char *label, 38 int count, 39 int sw_desc_size, 40 int hw_desc_size, 41 int num_segments, 42 int buffer_alignment); 43 extern int qcom_ess_edma_desc_ring_free(struct qcom_ess_edma_softc *sc, 44 struct qcom_ess_edma_desc_ring *ring); 45 extern void * qcom_ess_edma_desc_ring_get_sw_desc( 46 struct qcom_ess_edma_softc *sc, 47 struct qcom_ess_edma_desc_ring *ring, 48 uint16_t index); 49 extern void * qcom_ess_edma_desc_ring_get_hw_desc( 50 struct qcom_ess_edma_softc *sc, 51 struct qcom_ess_edma_desc_ring *ring, 52 uint16_t index); 53 extern int qcom_ess_edma_desc_ring_flush_preupdate( 54 struct qcom_ess_edma_softc *sc, 55 struct qcom_ess_edma_desc_ring *ring); 56 extern int qcom_ess_edma_desc_ring_flush_postupdate( 57 struct qcom_ess_edma_softc *sc, 58 struct qcom_ess_edma_desc_ring *ring); 59 extern int qcom_ess_edma_desc_ring_get_num_available( 60 struct qcom_ess_edma_softc *sc, 61 struct qcom_ess_edma_desc_ring *ring); 62 63 #endif /* __QCOM_ESS_EDMA_DESC_H__ */ 64