2 * Copyright (c) 1997, 1998 Justin T. Gibbs.
3 * Copyright (c) 2002 by Thomas Moestl <tmm@FreeBSD.org>.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
24 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 * from: FreeBSD: src/sys/i386/i386/busdma_machdep.c,v 1.25 2002/01/05
31 #ifndef _MACHINE_BUS_PRIVATE_H_
32 #define _MACHINE_BUS_PRIVATE_H_
34 #include <sys/queue.h>
39 int sparc64_bus_mem_map(bus_space_tag_t, bus_space_handle_t, bus_size_t,
40 int, vm_offset_t, void **);
41 int sparc64_bus_mem_unmap(void *, bus_size_t);
42 bus_space_handle_t sparc64_fake_bustag(int, bus_addr_t, struct bus_space_tag *);
44 struct bus_dmamap_res {
45 struct resource *dr_res;
48 SLIST_ENTRY(bus_dmamap_res) dr_link;
52 * Callers of the bus_dma interfaces must always protect their tags and maps
53 * appropriately against concurrent access. However, when a map is on a LRU
54 * queue, there is a second access path to it; for this case, the locking rules
55 * are given in the parenthesized comments below:
56 * q - locked by the mutex protecting the queue.
57 * p - private to the owner of the map, no access through the queue.
58 * * - comment refers to pointer target.
59 * Only the owner of the map is allowed to insert the map into a queue. Removal
60 * and repositioning (i.e. temporal removal and reinsertion) is allowed to all
61 * if the queue lock is held.
64 TAILQ_ENTRY(bus_dmamap) dm_maplruq; /* (q) */
65 SLIST_HEAD(, bus_dmamap_res) dm_reslist; /* (q, *q) */
67 int dm_flags; /* (p) */
71 #define DMF_LOADED 1 /* Map is loaded */
72 #define DMF_COHERENT 2 /* Coherent mapping requested */
74 int sparc64_dma_alloc_map(bus_dma_tag_t dmat, bus_dmamap_t *mapp);
75 void sparc64_dma_free_map(bus_dma_tag_t dmat, bus_dmamap_t map);
78 * XXX: This is a kluge. It would be better to handle dma tags in a hierarchical
79 * way, and have a BUS_GET_DMA_TAG(); however, since this is not currently the
80 * case, save a root tag in the relevant bus attach function and use that.
82 extern bus_dma_tag_t sparc64_root_dma_tag;
84 #endif /* !_MACHINE_BUS_PRIVATE_H_ */