1/*-
  2 * SPDX-License-Identifier: BSD-4-Clause
  3 *
  4 * Copyright (C) 2003
  5 * 	Hidetoshi Shimokawa. All rights reserved.
  6 *
  7 * Redistribution and use in source and binary forms, with or without
  8 * modification, are permitted provided that the following conditions
  9 * are met:
 10 * 1. Redistributions of source code must retain the above copyright
 11 *    notice, this list of conditions and the following 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 * 3. All advertising materials mentioning features or use of this software
 16 *    must display the following acknowledgement:
 17 *
 18 *	This product includes software developed by Hidetoshi Shimokawa.
 19 *
 20 * 4. Neither the name of the author nor the names of its contributors
 21 *    may be used to endorse or promote products derived from this software
 22 *    without specific prior written permission.
 23 *
 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 34 * SUCH DAMAGE.
 35 */
 36
 37struct fwdma_alloc {
 38	bus_dma_tag_t	dma_tag;
 39	bus_dmamap_t	dma_map;
 40	void 		*v_addr;
 41	bus_addr_t	bus_addr;
 42};
 43
 44struct fwdma_seg {
 45	bus_dmamap_t	dma_map;
 46	void 		*v_addr;
 47	bus_addr_t	bus_addr;
 48};
 49
 50struct fwdma_alloc_multi {
 51	bus_size_t	ssize;
 52	bus_size_t	esize;
 53	int		nseg;
 54	bus_dma_tag_t	dma_tag;
 55	struct fwdma_seg seg[0];
 56};
 57
 58static __inline void *
 59fwdma_v_addr(struct fwdma_alloc_multi *am, int index)
 60{
 61	bus_size_t ssize = am->ssize;
 62	int offset = am->esize * index;
 63
 64	return ((caddr_t)am->seg[offset / ssize].v_addr + (offset % ssize));
 65}
 66
 67static __inline bus_addr_t
 68fwdma_bus_addr(struct fwdma_alloc_multi *am, int index)
 69{
 70	bus_size_t ssize = am->ssize;
 71	int offset = am->esize * index;
 72
 73	return (am->seg[offset / ssize].bus_addr + (offset % ssize));
 74}
 75
 76static __inline void
 77fwdma_sync(struct fwdma_alloc *dma, bus_dmasync_op_t op)
 78{
 79	bus_dmamap_sync(dma->dma_tag, dma->dma_map, op);
 80}
 81
 82static __inline void
 83fwdma_sync_multiseg(struct fwdma_alloc_multi *am,
 84    int start, int end, bus_dmasync_op_t op)
 85{
 86	struct fwdma_seg *seg, *eseg;
 87
 88	seg = &am->seg[am->esize * start / am->ssize];
 89	eseg = &am->seg[am->esize * end / am->ssize];
 90	for (; seg <= eseg; seg++)
 91		bus_dmamap_sync(am->dma_tag, seg->dma_map, op);
 92}
 93
 94static __inline void
 95fwdma_sync_multiseg_all(struct fwdma_alloc_multi *am, bus_dmasync_op_t op)
 96{
 97	struct fwdma_seg *seg;
 98	int i;
 99
100	seg = &am->seg[0];
101	for (i = 0; i < am->nseg; i++, seg++)
102		bus_dmamap_sync(am->dma_tag, seg->dma_map, op);
103}
104
105void *fwdma_malloc(struct firewire_comm *, int, bus_size_t, struct fwdma_alloc *, int);
106void fwdma_free(struct firewire_comm *, struct fwdma_alloc *);
107void *fwdma_malloc_size(bus_dma_tag_t, bus_dmamap_t *, bus_size_t, bus_addr_t *, int);
108void fwdma_free_size(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t);
109struct fwdma_alloc_multi *fwdma_malloc_multiseg(struct firewire_comm *,
110	int, int, int, int);
111void fwdma_free_multiseg(struct fwdma_alloc_multi *);