4410329b87
int _bus_dmatag_subregion(bus_dma_tag_t tag, bus_addr_t min_addr, bus_addr_t max_addr, bus_dma_tag_t *newtag, int flags) void _bus_dmatag_destroy(bus_dma_tag_t tag) that allow a (normally broken/limited) device to restrict the bus address range it can talk to. this is used by bce(4) to limit DMA addresses to 1GB range, the maximum the chip can address. all this is from Yorick Hardy <yhardy@uj.ac.za> with input from several people on tech-kern. XXX: bus_dma(9) needs an update still.
726 lines
24 KiB
C
726 lines
24 KiB
C
/* $NetBSD: bus.h,v 1.20 2007/02/21 20:41:23 mrg Exp $ */
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/*
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* Copyright (c) 1996, 1997, 1998, 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _COBALT_BUS_H_
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#define _COBALT_BUS_H_
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#include <mips/locore.h>
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/*
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* Utility macros; do not use outside this file.
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*/
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#define __PB_TYPENAME_PREFIX(BITS) ___CONCAT(uint,BITS)
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#define __PB_TYPENAME(BITS) ___CONCAT(__PB_TYPENAME_PREFIX(BITS),_t)
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/*
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* Bus address and size types
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*/
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typedef u_long bus_addr_t;
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typedef u_long bus_size_t;
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/*
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* Access methods for bus resources and address space.
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*/
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typedef int bus_space_tag_t;
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typedef u_long bus_space_handle_t;
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/*
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* int bus_space_map(bus_space_tag_t t, bus_addr_t addr,
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* bus_size_t size, int flags, bus_space_handle_t *bshp);
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*
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* Map a region of bus space.
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*/
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#define BUS_SPACE_MAP_CACHEABLE 0x01
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#define BUS_SPACE_MAP_LINEAR 0x02
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#define BUS_SPACE_MAP_PREFETCHABLE 0x04
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int bus_space_map(bus_space_tag_t, bus_addr_t, bus_size_t,
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int, bus_space_handle_t *);
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/*
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* void bus_space_unmap(bus_space_tag_t t,
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* bus_space_handle_t bsh, bus_size_t size);
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*
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* Unmap a region of bus space.
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*/
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void bus_space_unmap (bus_space_tag_t, bus_space_handle_t, bus_size_t);
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/*
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* int bus_space_subregion(bus_space_tag_t t,
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* bus_space_handle_t bsh, bus_size_t offset, bus_size_t size,
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* bus_space_handle_t *nbshp);
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*
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* Get a new handle for a subregion of an already-mapped area of bus space.
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*/
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int bus_space_subregion(bus_space_tag_t t, bus_space_handle_t bsh,
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bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp);
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/*
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* int bus_space_alloc(bus_space_tag_t t, bus_addr_t, rstart,
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* bus_addr_t rend, bus_size_t size, bus_size_t align,
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* bus_size_t boundary, int flags, bus_addr_t *addrp,
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* bus_space_handle_t *bshp);
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*
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* Allocate a region of bus space.
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*/
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int bus_space_alloc (bus_space_tag_t t, bus_addr_t rstart,
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bus_addr_t rend, bus_size_t size, bus_size_t align,
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bus_size_t boundary, int cacheable, bus_addr_t *addrp,
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bus_space_handle_t *bshp);
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/*
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* int bus_space_free (bus_space_tag_t t,
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* bus_space_handle_t bsh, bus_size_t size);
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*
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* Free a region of bus space.
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*/
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void bus_space_free(bus_space_tag_t t, bus_space_handle_t bsh,
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bus_size_t size);
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/*
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* uintN_t bus_space_read_N(bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset);
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*
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* Read a 1, 2, 4, or 8 byte quantity from bus space
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* described by tag/handle/offset.
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*/
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#define bus_space_read_1(t, h, o) \
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((void) t, (*(volatile uint8_t *)((h) + (o))))
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#define bus_space_read_2(t, h, o) \
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((void) t, (*(volatile uint16_t *)((h) + (o))))
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#define bus_space_read_4(t, h, o) \
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((void) t, (*(volatile uint32_t *)((h) + (o))))
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#if 0 /* Cause a link error for bus_space_read_8 */
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#define bus_space_read_8(t, h, o) !!! bus_space_read_8 unimplemented !!!
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#endif
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/*
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* void bus_space_read_multi_N(bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset,
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* uintN_t *addr, size_t count);
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*
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* Read `count' 1, 2, 4, or 8 byte quantities from bus space
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* described by tag/handle/offset and copy into buffer provided.
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*/
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#define __COBALT_bus_space_read_multi(BYTES,BITS) \
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static __inline void __CONCAT(bus_space_read_multi_,BYTES) \
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(bus_space_tag_t, bus_space_handle_t, bus_size_t, \
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__PB_TYPENAME(BITS) *, size_t); \
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\
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static __inline void \
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__CONCAT(bus_space_read_multi_,BYTES)(t, h, o, a, c) \
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bus_space_tag_t t; \
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bus_space_handle_t h; \
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bus_size_t o; \
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__PB_TYPENAME(BITS) *a; \
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size_t c; \
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{ \
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\
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while (c--) \
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*a++ = __CONCAT(bus_space_read_,BYTES)(t, h, o); \
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}
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__COBALT_bus_space_read_multi(1,8)
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__COBALT_bus_space_read_multi(2,16)
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__COBALT_bus_space_read_multi(4,32)
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#if 0 /* Cause a link error for bus_space_read_multi_8 */
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#define bus_space_read_multi_8 !!! bus_space_read_multi_8 unimplemented !!!
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#endif
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#undef __COBALT_bus_space_read_multi
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/*
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* void bus_space_read_region_N(bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset,
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* uintN_t *addr, size_t count);
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*
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* Read `count' 1, 2, 4, or 8 byte quantities from bus space
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* described by tag/handle and starting at `offset' and copy into
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* buffer provided.
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*/
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#define __COBALT_bus_space_read_region(BYTES,BITS) \
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static __inline void __CONCAT(bus_space_read_region_,BYTES) \
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(bus_space_tag_t, bus_space_handle_t, bus_size_t, \
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__PB_TYPENAME(BITS) *, size_t); \
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\
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static __inline void \
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__CONCAT(bus_space_read_region_,BYTES)(t, h, o, a, c) \
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bus_space_tag_t t; \
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bus_space_handle_t h; \
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bus_size_t o; \
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__PB_TYPENAME(BITS) *a; \
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size_t c; \
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{ \
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\
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while (c--) { \
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*a++ = __CONCAT(bus_space_read_,BYTES)(t, h, o); \
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o += BYTES; \
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} \
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}
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__COBALT_bus_space_read_region(1,8)
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__COBALT_bus_space_read_region(2,16)
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__COBALT_bus_space_read_region(4,32)
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#if 0 /* Cause a link error for bus_space_read_region_8 */
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#define bus_space_read_region_8 !!! bus_space_read_region_8 unimplemented !!!
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#endif
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#undef __COBALT_bus_space_read_region
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/*
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* void bus_space_write_N(bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset,
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* uintN_t value);
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*
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* Write the 1, 2, 4, or 8 byte value `value' to bus space
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* described by tag/handle/offset.
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*/
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#define bus_space_write_1(t, h, o, v) \
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do { \
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(void) t; \
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*(volatile uint8_t *)((h) + (o)) = (v); \
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} while (0)
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#define bus_space_write_2(t, h, o, v) \
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do { \
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(void) t; \
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*(volatile uint16_t *)((h) + (o)) = (v); \
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} while (0)
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#define bus_space_write_4(t, h, o, v) \
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do { \
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(void) t; \
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*(volatile uint32_t *)((h) + (o)) = (v); \
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} while (0)
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#if 0 /* Cause a link error for bus_space_write_8 */
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#define bus_space_write_8 !!! bus_space_write_8 not implemented !!!
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#endif
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/*
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* void bus_space_write_multi_N(bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset,
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* const uintN_t *addr, size_t count);
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*
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* Write `count' 1, 2, 4, or 8 byte quantities from the buffer
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* provided to bus space described by tag/handle/offset.
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*/
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#define __COBALT_bus_space_write_multi(BYTES,BITS) \
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static __inline void __CONCAT(bus_space_write_multi_,BYTES) \
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(bus_space_tag_t, bus_space_handle_t, bus_size_t, \
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const __PB_TYPENAME(BITS) *, size_t); \
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\
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static __inline void \
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__CONCAT(bus_space_write_multi_,BYTES)(t, h, o, a, c) \
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bus_space_tag_t t; \
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bus_space_handle_t h; \
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bus_size_t o; \
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const __PB_TYPENAME(BITS) *a; \
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size_t c; \
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{ \
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\
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while (c--) \
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__CONCAT(bus_space_write_,BYTES)(t, h, o, *a++); \
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}
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__COBALT_bus_space_write_multi(1,8)
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__COBALT_bus_space_write_multi(2,16)
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__COBALT_bus_space_write_multi(4,32)
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#if 0 /* Cause a link error for bus_space_write_8 */
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#define bus_space_write_multi_8(t, h, o, a, c) \
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!!! bus_space_write_multi_8 unimplimented !!!
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#endif
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#undef __COBALT_bus_space_write_multi
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/*
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* void bus_space_write_region_N(bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset,
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* const uintN_t *addr, size_t count);
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*
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* Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided
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* to bus space described by tag/handle starting at `offset'.
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*/
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#define __COBALT_bus_space_write_region(BYTES,BITS) \
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static __inline void __CONCAT(bus_space_write_region_,BYTES) \
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(bus_space_tag_t, bus_space_handle_t, bus_size_t, \
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const __PB_TYPENAME(BITS) *, size_t); \
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\
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static __inline void \
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__CONCAT(bus_space_write_region_,BYTES)(t, h, o, a, c) \
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bus_space_tag_t t; \
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bus_space_handle_t h; \
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bus_size_t o; \
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const __PB_TYPENAME(BITS) *a; \
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size_t c; \
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{ \
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\
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while (c--) { \
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__CONCAT(bus_space_write_,BYTES)(t, h, o, *a++); \
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o += BYTES; \
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} \
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}
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__COBALT_bus_space_write_region(1,8)
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__COBALT_bus_space_write_region(2,16)
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__COBALT_bus_space_write_region(4,32)
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#if 0 /* Cause a link error for bus_space_write_region_8 */
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#define bus_space_write_region_8 \
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!!! bus_space_write_region_8 unimplemented !!!
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#endif
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#undef __COBALT_bus_space_write_region
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/*
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* void bus_space_set_multi_N(bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset, uintN_t val,
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* size_t count);
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*
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* Write the 1, 2, 4, or 8 byte value `val' to bus space described
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* by tag/handle/offset `count' times.
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*/
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#define __COBALT_bus_space_set_multi(BYTES,BITS) \
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static __inline void __CONCAT(bus_space_set_multi_,BYTES) \
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(bus_space_tag_t, bus_space_handle_t, bus_size_t, \
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__PB_TYPENAME(BITS), size_t); \
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\
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static __inline void \
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__CONCAT(bus_space_set_multi_,BYTES)(t, h, o, v, c) \
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bus_space_tag_t t; \
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bus_space_handle_t h; \
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bus_size_t o; \
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__PB_TYPENAME(BITS) v; \
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size_t c; \
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{ \
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\
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while (c--) \
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__CONCAT(bus_space_write_,BYTES)(t, h, o, v); \
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}
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__COBALT_bus_space_set_multi(1,8)
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__COBALT_bus_space_set_multi(2,16)
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__COBALT_bus_space_set_multi(4,32)
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#if 0 /* Cause a link error for bus_space_set_multi_8 */
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#define bus_space_set_multi_8 \
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!!! bus_space_set_multi_8 unimplemented !!!
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#endif
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#undef __COBALT_bus_space_set_multi
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/*
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* void bus_space_set_region_N(bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset, uintN_t val,
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* size_t count);
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*
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* Write `count' 1, 2, 4, or 8 byte value `val' to bus space described
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* by tag/handle starting at `offset'.
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*/
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#define __COBALT_bus_space_set_region(BYTES,BITS) \
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static __inline void __CONCAT(bus_space_set_region_,BYTES) \
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(bus_space_tag_t, bus_space_handle_t, bus_size_t, \
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__PB_TYPENAME(BITS), size_t); \
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\
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static __inline void \
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__CONCAT(bus_space_set_region_,BYTES)(t, h, o, v, c) \
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bus_space_tag_t t; \
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bus_space_handle_t h; \
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bus_size_t o; \
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__PB_TYPENAME(BITS) v; \
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size_t c; \
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{ \
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\
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while (c--) { \
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__CONCAT(bus_space_write_,BYTES)(t, h, o, v); \
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o += BYTES; \
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} \
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}
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__COBALT_bus_space_set_region(1,8)
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__COBALT_bus_space_set_region(2,16)
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__COBALT_bus_space_set_region(4,32)
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#if 0 /* Cause a link error for bus_space_set_region_8 */
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#define bus_space_set_region_8 \
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!!! bus_space_set_region_8 unimplemented !!!
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#endif
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#undef __COBALT_bus_space_set_region
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/*
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* void bus_space_copy_region_N(bus_space_tag_t tag,
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* bus_space_handle_t bsh1, bus_size_t off1,
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* bus_space_handle_t bsh2, bus_size_t off2,
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* bus_size_t count);
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*
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* Copy `count' 1, 2, 4, or 8 byte values from bus space starting
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* at tag/bsh1/off1 to bus space starting at tag/bsh2/off2.
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*/
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#define __COBALT_copy_region(BYTES) \
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static __inline void __CONCAT(bus_space_copy_region_,BYTES) \
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(bus_space_tag_t, \
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bus_space_handle_t bsh1, bus_size_t off1, \
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bus_space_handle_t bsh2, bus_size_t off2, \
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bus_size_t count); \
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\
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static __inline void \
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__CONCAT(bus_space_copy_region_,BYTES)(t, h1, o1, h2, o2, c) \
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bus_space_tag_t t; \
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bus_space_handle_t h1, h2; \
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bus_size_t o1, o2, c; \
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{ \
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bus_size_t o; \
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\
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if ((h1 + o1) >= (h2 + o2)) { \
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/* src after dest: copy forward */ \
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for (o = 0; c != 0; c--, o += BYTES) \
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__CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o, \
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__CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \
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} else { \
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/* dest after src: copy backwards */ \
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for (o = (c - 1) * BYTES; c != 0; c--, o -= BYTES) \
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__CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o, \
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__CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \
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} \
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}
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__COBALT_copy_region(1)
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__COBALT_copy_region(2)
|
|
__COBALT_copy_region(4)
|
|
|
|
#if 0 /* Cause a link error for bus_space_copy_region_8 */
|
|
#define bus_space_copy_region_8 \
|
|
!!! bus_space_copy_region_8 unimplemented !!!
|
|
#endif
|
|
|
|
#undef __COBALT_copy_region
|
|
|
|
/*
|
|
* Operations which handle byte stream data on word access.
|
|
*
|
|
* These functions are defined to resolve endian mismatch, by either
|
|
* - When normal (i.e. stream-less) operations perform byte swap
|
|
* to resolve endian mismatch, these functions bypass the byte swap.
|
|
* or
|
|
* - When bus bridge performs automatic byte swap, these functions
|
|
* perform byte swap once more, to cancel the bridge's behavior.
|
|
*
|
|
* Currently these are just same as normal operations, since all
|
|
* supported buses are same endian with CPU (i.e. little-endian).
|
|
*
|
|
*/
|
|
#define __BUS_SPACE_HAS_STREAM_METHODS
|
|
#define bus_space_read_stream_2(tag, bsh, offset) \
|
|
bus_space_read_2(tag, bsh, offset)
|
|
#define bus_space_read_stream_4(tag, bsh, offset) \
|
|
bus_space_read_4(tag, bsh, offset)
|
|
#define bus_space_read_stream_8(tag, bsh, offset) \
|
|
bus_space_read_8(tag, bsh, offset)
|
|
#define bus_space_read_multi_stream_2(tag, bsh, offset, datap, count) \
|
|
bus_space_read_multi_2(tag, bsh, offset, datap, count)
|
|
#define bus_space_read_multi_stream_4(tag, bsh, offset, datap, count) \
|
|
bus_space_read_multi_4(tag, bsh, offset, datap, count)
|
|
#define bus_space_read_multi_stream_8(tag, bsh, offset, datap, count) \
|
|
bus_space_read_multi_8(tag, bsh, offset, datap, count)
|
|
#define bus_space_read_region_stream_2(tag, bsh, offset, datap, count) \
|
|
bus_space_read_region_2(tag, bsh, offset, datap, count)
|
|
#define bus_space_read_region_stream_4(tag, bsh, offset, datap, count) \
|
|
bus_space_read_region_4(tag, bsh, offset, datap, count)
|
|
#define bus_space_read_region_stream_8(tag, bsh, offset, datap, count) \
|
|
bus_space_read_region_8(tag, bsh, offset, datap, count)
|
|
#define bus_space_write_stream_2(tag, bsh, offset, data) \
|
|
bus_space_write_2(tag, bsh, offset, data)
|
|
#define bus_space_write_stream_4(tag, bsh, offset, data) \
|
|
bus_space_write_4(tag, bsh, offset, data)
|
|
#define bus_space_write_stream_8(tag, bsh, offset, data) \
|
|
bus_space_write_8(tag, bsh, offset, data)
|
|
#define bus_space_write_multi_stream_2(tag, bsh, offset, datap, count) \
|
|
bus_space_write_multi_2(tag, bsh, offset, datap, count)
|
|
#define bus_space_write_multi_stream_4(tag, bsh, offset, datap, count) \
|
|
bus_space_write_multi_4(tag, bsh, offset, datap, count)
|
|
#define bus_space_write_multi_stream_8(tag, bsh, offset, datap, count) \
|
|
bus_space_write_multi_8(tag, bsh, offset, datap, count)
|
|
#define bus_space_write_region_stream_2(tag, bsh, offset, datap, count) \
|
|
bus_space_write_region_2(tag, bsh, offset, datap, count)
|
|
#define bus_space_write_region_stream_4(tag, bsh, offset, datap, count) \
|
|
bus_space_write_region_4(tag, bsh, offset, datap, count)
|
|
#define bus_space_write_region_stream_8(tag, bsh, offset, datap, count) \
|
|
bus_space_write_region_8(tag, bsh, offset, datap, count)
|
|
#define bus_space_write_region_stream_2(tag, bsh, offset, datap, count) \
|
|
bus_space_write_region_2(tag, bsh, offset, datap, count)
|
|
#define bus_space_write_region_stream_4(tag, bsh, offset, datap, count) \
|
|
bus_space_write_region_4(tag, bsh, offset, datap, count)
|
|
#define bus_space_write_region_stream_8(tag, bsh, offset, datap, count) \
|
|
bus_space_write_region_8(tag, bsh, offset, datap, count)
|
|
#define bus_space_set_multi_stream_2(tag, bsh, offset, data, count) \
|
|
bus_space_set_multi_2(tag, bsh, offset, data, count)
|
|
#define bus_space_set_multi_stream_4(tag, bsh, offset, data, count) \
|
|
bus_space_set_multi_4(tag, bsh, offset, data, count)
|
|
#define bus_space_set_multi_stream_8(tag, bsh, offset, data, count) \
|
|
bus_space_set_multi_8(tag, bsh, offset, data, count)
|
|
#define bus_space_set_region_stream_2(tag, bsh, offset, data, count) \
|
|
bus_space_set_region_2(tag, bsh, offset, data, count)
|
|
#define bus_space_set_region_stream_4(tag, bsh, offset, data, count) \
|
|
bus_space_set_region_4(tag, bsh, offset, data, count)
|
|
#define bus_space_set_region_stream_8(tag, bsh, offset, data, count) \
|
|
bus_space_set_region_8(tag, bsh, offset, data, count)
|
|
|
|
/*
|
|
* Bus read/write barrier methods.
|
|
*
|
|
* void bus_space_barrier(bus_space_tag_t tag,
|
|
* bus_space_handle_t bsh, bus_size_t offset,
|
|
* bus_size_t len, int flags);
|
|
*
|
|
* On the MIPS, we just flush the write buffer.
|
|
*/
|
|
#define bus_space_barrier(t, h, o, l, f) \
|
|
((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f), \
|
|
wbflush()))
|
|
#define BUS_SPACE_BARRIER_READ 0x01 /* force read barrier */
|
|
#define BUS_SPACE_BARRIER_WRITE 0x02 /* force write barrier */
|
|
|
|
#undef __PB_TYPENAME_PREFIX
|
|
#undef __PB_TYPENAME
|
|
|
|
#define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t)
|
|
|
|
/*
|
|
* Flags used in various bus DMA methods.
|
|
*/
|
|
#define BUS_DMA_WAITOK 0x000 /* safe to sleep (pseudo-flag) */
|
|
#define BUS_DMA_NOWAIT 0x001 /* not safe to sleep */
|
|
#define BUS_DMA_ALLOCNOW 0x002 /* perform resource allocation now */
|
|
#define BUS_DMA_COHERENT 0x004 /* hint: map memory DMA coherent */
|
|
#define BUS_DMA_STREAMING 0x008 /* hint: sequential, unidirectional */
|
|
#define BUS_DMA_BUS1 0x010 /* placeholders for bus functions... */
|
|
#define BUS_DMA_BUS2 0x020
|
|
#define BUS_DMA_BUS3 0x040
|
|
#define BUS_DMA_BUS4 0x080
|
|
#define BUS_DMA_READ 0x100 /* mapping is device -> memory only */
|
|
#define BUS_DMA_WRITE 0x200 /* mapping is memory -> device only */
|
|
#define BUS_DMA_NOCACHE 0x400 /* hint: map non-cached memory */
|
|
|
|
#define COBALT_DMAMAP_COHERENT 0x10000 /* no cache flush necessary on sync */
|
|
|
|
/* Forwards needed by prototypes below. */
|
|
struct mbuf;
|
|
struct uio;
|
|
|
|
/*
|
|
* Operations performed by bus_dmamap_sync().
|
|
*/
|
|
#define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */
|
|
#define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */
|
|
#define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */
|
|
#define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */
|
|
|
|
typedef struct cobalt_bus_dma_tag *bus_dma_tag_t;
|
|
typedef struct cobalt_bus_dmamap *bus_dmamap_t;
|
|
|
|
#define BUS_DMA_TAG_VALID(t) ((t) != (bus_dma_tag_t)0)
|
|
|
|
/*
|
|
* bus_dma_segment_t
|
|
*
|
|
* Describes a single contiguous DMA transaction. Values
|
|
* are suitable for programming into DMA registers.
|
|
*/
|
|
struct cobalt_bus_dma_segment {
|
|
bus_addr_t ds_addr; /* DMA address */
|
|
bus_size_t ds_len; /* length of transfer */
|
|
vaddr_t _ds_vaddr; /* virtual address, 0 if invalid */
|
|
};
|
|
typedef struct cobalt_bus_dma_segment bus_dma_segment_t;
|
|
|
|
/*
|
|
* bus_dma_tag_t
|
|
*
|
|
* A machine-dependent opaque type describing the implementation of
|
|
* DMA for a given bus.
|
|
*/
|
|
|
|
struct cobalt_bus_dma_tag {
|
|
/*
|
|
* DMA mapping methods.
|
|
*/
|
|
int (*_dmamap_create)(bus_dma_tag_t, bus_size_t, int,
|
|
bus_size_t, bus_size_t, int, bus_dmamap_t *);
|
|
void (*_dmamap_destroy)(bus_dma_tag_t, bus_dmamap_t);
|
|
int (*_dmamap_load)(bus_dma_tag_t, bus_dmamap_t, void *,
|
|
bus_size_t, struct proc *, int);
|
|
int (*_dmamap_load_mbuf)(bus_dma_tag_t, bus_dmamap_t,
|
|
struct mbuf *, int);
|
|
int (*_dmamap_load_uio)(bus_dma_tag_t, bus_dmamap_t,
|
|
struct uio *, int);
|
|
int (*_dmamap_load_raw)(bus_dma_tag_t, bus_dmamap_t,
|
|
bus_dma_segment_t *, int, bus_size_t, int);
|
|
void (*_dmamap_unload)(bus_dma_tag_t, bus_dmamap_t);
|
|
void (*_dmamap_sync)(bus_dma_tag_t, bus_dmamap_t,
|
|
bus_addr_t, bus_size_t, int);
|
|
|
|
/*
|
|
* DMA memory utility functions.
|
|
*/
|
|
int (*_dmamem_alloc)(bus_dma_tag_t, bus_size_t, bus_size_t,
|
|
bus_size_t, bus_dma_segment_t *, int, int *, int);
|
|
void (*_dmamem_free)(bus_dma_tag_t,
|
|
bus_dma_segment_t *, int);
|
|
int (*_dmamem_map)(bus_dma_tag_t, bus_dma_segment_t *,
|
|
int, size_t, caddr_t *, int);
|
|
void (*_dmamem_unmap)(bus_dma_tag_t, caddr_t, size_t);
|
|
paddr_t (*_dmamem_mmap)(bus_dma_tag_t, bus_dma_segment_t *,
|
|
int, off_t, int, int);
|
|
};
|
|
|
|
#define bus_dmamap_create(t, s, n, m, b, f, p) \
|
|
(*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p))
|
|
#define bus_dmamap_destroy(t, p) \
|
|
(*(t)->_dmamap_destroy)((t), (p))
|
|
#define bus_dmamap_load(t, m, b, s, p, f) \
|
|
(*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f))
|
|
#define bus_dmamap_load_mbuf(t, m, b, f) \
|
|
(*(t)->_dmamap_load_mbuf)((t), (m), (b), (f))
|
|
#define bus_dmamap_load_uio(t, m, u, f) \
|
|
(*(t)->_dmamap_load_uio)((t), (m), (u), (f))
|
|
#define bus_dmamap_load_raw(t, m, sg, n, s, f) \
|
|
(*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f))
|
|
#define bus_dmamap_unload(t, p) \
|
|
(*(t)->_dmamap_unload)((t), (p))
|
|
#define bus_dmamap_sync(t, p, o, l, ops) \
|
|
(*(t)->_dmamap_sync)((t), (p), (o), (l), (ops))
|
|
|
|
#define bus_dmamem_alloc(t, s, a, b, sg, n, r, f) \
|
|
(*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f))
|
|
#define bus_dmamem_free(t, sg, n) \
|
|
(*(t)->_dmamem_free)((t), (sg), (n))
|
|
#define bus_dmamem_map(t, sg, n, s, k, f) \
|
|
(*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f))
|
|
#define bus_dmamem_unmap(t, k, s) \
|
|
(*(t)->_dmamem_unmap)((t), (k), (s))
|
|
#define bus_dmamem_mmap(t, sg, n, o, p, f) \
|
|
(*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f))
|
|
|
|
#define bus_dmatag_subregion(t, mna, mxa, nt, f) EOPNOTSUPP
|
|
#define bus_dmatag_destroy(t)
|
|
|
|
/*
|
|
* bus_dmamap_t
|
|
*
|
|
* Describes a DMA mapping.
|
|
*/
|
|
struct cobalt_bus_dmamap {
|
|
/*
|
|
* PRIVATE MEMBERS: not for use my machine-independent code.
|
|
*/
|
|
bus_size_t _dm_size; /* largest DMA transfer mappable */
|
|
int _dm_segcnt; /* number of segs this map can map */
|
|
bus_size_t _dm_maxmaxsegsz; /* fixed largest possible segment */
|
|
bus_size_t _dm_boundary; /* don't cross this */
|
|
int _dm_flags; /* misc. flags */
|
|
struct vmspace *_dm_vmspace; /* vmspace that owns this mapping */
|
|
|
|
/*
|
|
* PUBLIC MEMBERS: these are used by machine-independent code.
|
|
*/
|
|
bus_size_t dm_maxsegsz; /* largest possible segment */
|
|
bus_size_t dm_mapsize; /* size of the mapping */
|
|
int dm_nsegs; /* # valid segments in mapping */
|
|
bus_dma_segment_t dm_segs[1]; /* segments; variable length */
|
|
};
|
|
|
|
#ifdef _COBALT_BUS_DMA_PRIVATE
|
|
int _bus_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t,
|
|
bus_size_t, int, bus_dmamap_t *);
|
|
void _bus_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t);
|
|
int _bus_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *,
|
|
bus_size_t, struct proc *, int);
|
|
int _bus_dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t,
|
|
struct mbuf *, int);
|
|
int _bus_dmamap_load_uio(bus_dma_tag_t, bus_dmamap_t,
|
|
struct uio *, int);
|
|
int _bus_dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t,
|
|
bus_dma_segment_t *, int, bus_size_t, int);
|
|
void _bus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t);
|
|
void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
|
|
bus_size_t, int);
|
|
|
|
int _bus_dmamem_alloc(bus_dma_tag_t tag, bus_size_t size,
|
|
bus_size_t alignment, bus_size_t boundary,
|
|
bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags);
|
|
void _bus_dmamem_free(bus_dma_tag_t tag, bus_dma_segment_t *segs,
|
|
int nsegs);
|
|
int _bus_dmamem_map(bus_dma_tag_t tag, bus_dma_segment_t *segs,
|
|
int nsegs, size_t size, caddr_t *kvap, int flags);
|
|
void _bus_dmamem_unmap(bus_dma_tag_t tag, caddr_t kva,
|
|
size_t size);
|
|
paddr_t _bus_dmamem_mmap(bus_dma_tag_t tag, bus_dma_segment_t *segs,
|
|
int nsegs, off_t off, int prot, int flags);
|
|
|
|
int _bus_dmamem_alloc_range(bus_dma_tag_t tag, bus_size_t size,
|
|
bus_size_t alignment, bus_size_t boundary,
|
|
bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags,
|
|
vaddr_t low, vaddr_t high);
|
|
|
|
extern struct cobalt_bus_dma_tag cobalt_default_bus_dma_tag;
|
|
#endif /* _COBALT_BUS_DMA_PRIVATE */
|
|
|
|
#endif /* _COBALT_BUS_H_ */
|