/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2021 Adrian Chadd . * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice unmodified, this list of conditions, and the following * disclaimer. * 2. 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. * * $FreeBSD$ * */ #ifndef __QCOM_ESS_EDMA_DESC_H__ #define __QCOM_ESS_EDMA_DESC_H__ extern int qcom_ess_edma_desc_ring_setup(struct qcom_ess_edma_softc *sc, struct qcom_ess_edma_desc_ring *ring, char *label, int count, int sw_desc_size, int hw_desc_size, int num_segments, int buffer_alignment); extern int qcom_ess_edma_desc_ring_free(struct qcom_ess_edma_softc *sc, struct qcom_ess_edma_desc_ring *ring); extern void * qcom_ess_edma_desc_ring_get_sw_desc( struct qcom_ess_edma_softc *sc, struct qcom_ess_edma_desc_ring *ring, uint16_t index); extern void * qcom_ess_edma_desc_ring_get_hw_desc( struct qcom_ess_edma_softc *sc, struct qcom_ess_edma_desc_ring *ring, uint16_t index); extern int qcom_ess_edma_desc_ring_flush_preupdate( struct qcom_ess_edma_softc *sc, struct qcom_ess_edma_desc_ring *ring); extern int qcom_ess_edma_desc_ring_flush_postupdate( struct qcom_ess_edma_softc *sc, struct qcom_ess_edma_desc_ring *ring); extern int qcom_ess_edma_desc_ring_get_num_available( struct qcom_ess_edma_softc *sc, struct qcom_ess_edma_desc_ring *ring); #endif /* __QCOM_ESS_EDMA_DESC_H__ */