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/* $NetBSD: nextdmavar.h,v 1.18 2023/02/03 23:06:42 tsutsui Exp $ */
/*
* Copyright (c) 1998 Darrin B. Jewell
* All rights reserved.
*
* 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, 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 ``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 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.
*/
struct nextdma_channel {
const char *nd_name;
int nd_base;
int nd_size;
u_long nd_intr;
int (*nd_intrfunc)(void *);
};
struct nextdma_config {
/* This is called to get another map to dma */
bus_dmamap_t (*nd_continue_cb)(void *);
/* This is called when a map has completed dma */
void (*nd_completed_cb)(bus_dmamap_t, void *);
/* This is called when dma shuts down */
void (*nd_shutdown_cb) (void *);
/* callback argument */
void *nd_cb_arg;
};
struct nextdma_status {
bus_dmamap_t nd_map; /* map currently in dd_next */
int nd_idx; /* idx of segment currently in dd_next */
bus_dmamap_t nd_map_cont; /* map needed to continue DMA */
int nd_idx_cont; /* segment index to continue DMA */
int nd_exception;
};
struct nextdma_softc {
device_t sc_dev;
struct nextdma_channel *sc_chan;
bus_space_handle_t sc_bsh; /* bus space handle */
bus_space_tag_t sc_bst; /* bus space tag */
bus_dma_tag_t sc_dmat;
struct nextdma_config sc_conf;
struct nextdma_status sc_stat;
struct evcnt sc_intrcnt;
};
#define nextdma_setconf(nsc, elem, val) nsc->sc_conf.nd_##elem = (val)
/* Configure the interface & initialize private structure vars */
void nextdma_config(struct nextdma_softc *);
void nextdma_init(struct nextdma_softc *);
void nextdma_start(struct nextdma_softc *, u_long);
/* query to see if nextdma is finished */
int nextdma_finished(struct nextdma_softc *);
void nextdma_reset(struct nextdma_softc *);
void nextdma_print(struct nextdma_softc *);
struct nextdma_softc *nextdma_findchannel(const char *);
void ndtrace_printf(const char *fmt, ...) __printflike(1, 2);
int ndtrace_empty(void);
void ndtrace_reset(void);
void ndtrace_addc(int);
const char *ndtrace_get(void);
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