1 /*- 2 * Copyright (c) 1997, 1998 Justin T. Gibbs. 3 * Copyright (c) 2002 by Thomas Moestl <tmm@FreeBSD.org>. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 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. 14 * 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. 25 * 26 * from: FreeBSD: src/sys/i386/i386/busdma_machdep.c,v 1.25 2002/01/05 27 * 28 * $FreeBSD: stable/9/sys/sparc64/include/bus_private.h 230687 2012-01-28 23:53:06Z marius $ 29 */ 30 31 #ifndef _MACHINE_BUS_PRIVATE_H_ 32 #define _MACHINE_BUS_PRIVATE_H_ 33 34 #include <sys/queue.h> 35 36 /* 37 * Helpers 38 */ 39 int sparc64_bus_mem_map(bus_space_tag_t tag, bus_addr_t addr, bus_size_t size, 40 int flags, vm_offset_t vaddr, bus_space_handle_t *hp); 41 int sparc64_bus_mem_unmap(bus_space_tag_t tag, bus_space_handle_t handle, 42 bus_size_t size); 43 bus_space_tag_t sparc64_alloc_bus_tag(void *cookie, 44 struct bus_space_tag *ptag, int type, void *barrier); 45 bus_space_handle_t sparc64_fake_bustag(int space, bus_addr_t addr, 46 struct bus_space_tag *ptag); 47 48 struct bus_dmamap_res { 49 struct resource *dr_res; 50 bus_size_t dr_used; 51 SLIST_ENTRY(bus_dmamap_res) dr_link; 52 }; 53 54 /* 55 * Callers of the bus_dma interfaces must always protect their tags and maps 56 * appropriately against concurrent access. However, when a map is on a LRU 57 * queue, there is a second access path to it; for this case, the locking rules 58 * are given in the parenthesized comments below: 59 * q - locked by the mutex protecting the queue. 60 * p - private to the owner of the map, no access through the queue. 61 * * - comment refers to pointer target. 62 * Only the owner of the map is allowed to insert the map into a queue. Removal 63 * and repositioning (i.e. temporal removal and reinsertion) is allowed to all 64 * if the queue lock is held. 65 */ 66 struct bus_dmamap { 67 TAILQ_ENTRY(bus_dmamap) dm_maplruq; /* (q) */ 68 SLIST_HEAD(, bus_dmamap_res) dm_reslist; /* (q, *q) */ 69 int dm_onq; /* (q) */ 70 int dm_flags; /* (p) */ 71 }; 72 73 /* Flag values */ 74 #define DMF_LOADED (1 << 0) /* Map is loaded. */ 75 #define DMF_COHERENT (1 << 1) /* Coherent mapping requested. */ 76 #define DMF_STREAMED (1 << 2) /* Streaming cache used. */ 77 78 int sparc64_dma_alloc_map(bus_dma_tag_t dmat, bus_dmamap_t *mapp); 79 void sparc64_dma_free_map(bus_dma_tag_t dmat, bus_dmamap_t map); 80 81 #endif /* !_MACHINE_BUS_PRIVATE_H_ */ 82