2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 1997, 1998 Justin T. Gibbs.
5 * Copyright (c) 2002 by Thomas Moestl <tmm@FreeBSD.org>.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
21 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
26 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 * from: FreeBSD: src/sys/i386/i386/busdma_machdep.c,v 1.25 2002/01/05
33 #ifndef _MACHINE_BUS_PRIVATE_H_
34 #define _MACHINE_BUS_PRIVATE_H_
36 #include <sys/queue.h>
41 int sparc64_bus_mem_map(bus_space_tag_t tag, bus_addr_t addr, bus_size_t size,
42 int flags, vm_offset_t vaddr, bus_space_handle_t *hp);
43 int sparc64_bus_mem_unmap(bus_space_tag_t tag, bus_space_handle_t handle,
45 bus_space_tag_t sparc64_alloc_bus_tag(void *cookie, int type);
46 bus_space_handle_t sparc64_fake_bustag(int space, bus_addr_t addr,
47 struct bus_space_tag *ptag);
49 struct bus_dmamap_res {
50 struct resource *dr_res;
52 SLIST_ENTRY(bus_dmamap_res) dr_link;
56 * Callers of the bus_dma interfaces must always protect their tags and maps
57 * appropriately against concurrent access. However, when a map is on a LRU
58 * queue, there is a second access path to it; for this case, the locking rules
59 * are given in the parenthesized comments below:
60 * q - locked by the mutex protecting the queue.
61 * p - private to the owner of the map, no access through the queue.
62 * * - comment refers to pointer target.
63 * Only the owner of the map is allowed to insert the map into a queue. Removal
64 * and repositioning (i.e. temporal removal and reinsertion) is allowed to all
65 * if the queue lock is held.
68 TAILQ_ENTRY(bus_dmamap) dm_maplruq; /* (q) */
69 SLIST_HEAD(, bus_dmamap_res) dm_reslist; /* (q, *q) */
71 int dm_flags; /* (p) */
75 #define DMF_LOADED (1 << 0) /* Map is loaded. */
76 #define DMF_COHERENT (1 << 1) /* Coherent mapping requested. */
77 #define DMF_STREAMED (1 << 2) /* Streaming cache used. */
79 int sparc64_dma_alloc_map(bus_dma_tag_t dmat, bus_dmamap_t *mapp);
80 void sparc64_dma_free_map(bus_dma_tag_t dmat, bus_dmamap_t map);
82 #endif /* !_MACHINE_BUS_PRIVATE_H_ */