/*-
* Copyright (c) 1997, 1998 Justin T. Gibbs.
* Copyright (c) 2002 by Thomas Moestl <tmm@FreeBSD.org>.
* 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 OR CONTRIBUTORS 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.
*
* from: FreeBSD: src/sys/i386/i386/busdma_machdep.c,v 1.25 2002/01/05
*
* $FreeBSD$
*/
#ifndef _MACHINE_BUS_PRIVATE_H_
#define _MACHINE_BUS_PRIVATE_H_
#include <sys/queue.h>
/*
* Helpers
*/
int sparc64_bus_mem_map(bus_space_tag_t, bus_space_handle_t, bus_size_t,
int, vm_offset_t, void **);
int sparc64_bus_mem_unmap(void *, bus_size_t);
bus_space_handle_t sparc64_fake_bustag(int, bus_addr_t, struct bus_space_tag *);
struct bus_dmamap_res {
struct resource *dr_res;
bus_size_t dr_used;
SLIST_ENTRY(bus_dmamap_res) dr_link;
};
/*
* Callers of the bus_dma interfaces must always protect their tags and maps
* appropriately against concurrent access. However, when a map is on a LRU
* queue, there is a second access path to it; for this case, the locking rules
* are given in the parenthesized comments below:
* q - locked by the mutex protecting the queue.
* p - private to the owner of the map, no access through the queue.
* * - comment refers to pointer target.
* Only the owner of the map is allowed to insert the map into a queue. Removal
* and repositioning (i.e. temporal removal and reinsertion) is allowed to all
* if the queue lock is held.
*/
struct bus_dmamap {
TAILQ_ENTRY(bus_dmamap) dm_maplruq; /* (q) */
SLIST_HEAD(, bus_dmamap_res) dm_reslist; /* (q, *q) */
int dm_onq; /* (q) */
int dm_flags; /* (p) */
};
/* Flag values. */
#define DMF_LOADED 1 /* Map is loaded */
#define DMF_COHERENT 2 /* Coherent mapping requested */
int sparc64_dma_alloc_map(bus_dma_tag_t dmat, bus_dmamap_t *mapp);
void sparc64_dma_free_map(bus_dma_tag_t dmat, bus_dmamap_t map);
/*
* XXX: This is a kluge. It would be better to handle dma tags in a hierarchical
* way, and have a BUS_GET_DMA_TAG(); however, since this is not currently the
* case, save a root tag in the relevant bus attach function and use that.
*/
extern bus_dma_tag_t sparc64_root_dma_tag;
#endif /* !_MACHINE_BUS_PRIVATE_H_ */
