f6b1c44d1f
Add two new arguments to bus_dma_tag_create(): lockfunc and lockfuncarg. Lockfunc allows a driver to provide a function for managing its locking semantics while using busdma. At the moment, this is used for the asynchronous busdma_swi and callback mechanism. Two lockfunc implementations are provided: busdma_lock_mutex() performs standard mutex operations on the mutex that is specified from lockfuncarg. dftl_lock() is a panic implementation and is defaulted to when NULL, NULL are passed to bus_dma_tag_create(). The only time that NULL, NULL should ever be used is when the driver ensures that bus_dmamap_load() will not be deferred. Drivers that do not provide their own locking can pass busdma_lock_mutex,&Giant args in order to preserve the former behaviour. sparc64 and powerpc do not provide real busdma_swi functions, so this is largely a noop on those platforms. The busdma_swi on is64 is not properly locked yet, so warnings will be emitted on this platform when busdma callback deferrals happen. If anyone gets panics or warnings from dflt_lock() being called, please let me know right away. Reviewed by: tmm, gibbs
650 lines
24 KiB
C
650 lines
24 KiB
C
/* $NetBSD: bus.h,v 1.12 1997/10/01 08:25:15 fvdl Exp $ */
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/*-
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* Copyright (c) 1996, 1997 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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/*
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* Copyright (c) 1996 Charles M. Hannum. All rights reserved.
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* Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
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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 Christopher G. Demetriou
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* for the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* $FreeBSD$ */
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#ifndef _ALPHA_BUS_H_
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#define _ALPHA_BUS_H_
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/*
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* Bus address and size types
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*/
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typedef u_int64_t bus_addr_t;
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typedef u_int64_t bus_size_t;
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typedef struct alpha_busspace *bus_space_tag_t;
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typedef u_int32_t bus_space_handle_t;
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#define BUS_SPACE_MAXSIZE_24BIT 0xFFFFFF
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#define BUS_SPACE_MAXSIZE_32BIT 0xFFFFFFFF
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#define BUS_SPACE_MAXSIZE 0xFFFFFFFFFFFFFFFF
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#define BUS_SPACE_MAXADDR_24BIT 0xFFFFFF
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#define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF
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/* The largest address space known so far is 40 bits */
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#define BUS_SPACE_MAXADDR 0xFFFFFFFFFUL
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#define BUS_SPACE_UNRESTRICTED (~0UL)
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/*
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* Unmap a region of device bus space.
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*/
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static __inline void bus_space_unmap(bus_space_tag_t t, bus_space_handle_t bsh,
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bus_size_t size);
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static __inline void
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bus_space_unmap(bus_space_tag_t t __unused, bus_space_handle_t bsh __unused,
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bus_size_t size __unused)
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{
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}
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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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static __inline int bus_space_subregion(bus_space_tag_t t,
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bus_space_handle_t bsh,
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bus_size_t offset, bus_size_t size,
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bus_space_handle_t *nbshp);
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static __inline int
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bus_space_subregion(bus_space_tag_t t __unused, bus_space_handle_t bsh,
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bus_size_t offset, bus_size_t size __unused,
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bus_space_handle_t *nbshp)
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{
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*nbshp = bsh + offset;
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return (0);
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}
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struct alpha_busspace;
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struct alpha_busspace_ops {
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u_int8_t (*abo_read_1)(struct alpha_busspace *space, size_t offset);
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u_int16_t (*abo_read_2)(struct alpha_busspace *space, size_t offset);
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u_int32_t (*abo_read_4)(struct alpha_busspace *space, size_t offset);
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void (*abo_read_multi_1)(struct alpha_busspace *space,
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size_t offset,
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u_int8_t *addr, size_t count);
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void (*abo_read_multi_2)(struct alpha_busspace *space,
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size_t offset,
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u_int16_t *addr, size_t count);
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void (*abo_read_multi_4)(struct alpha_busspace *space,
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size_t offset,
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u_int32_t *addr, size_t count);
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void (*abo_read_region_1)(struct alpha_busspace *space,
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size_t offset,
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u_int8_t *addr, size_t count);
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void (*abo_read_region_2)(struct alpha_busspace *space,
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size_t offset,
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u_int16_t *addr, size_t count);
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void (*abo_read_region_4)(struct alpha_busspace *space,
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size_t offset,
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u_int32_t *addr, size_t count);
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void (*abo_write_1)(struct alpha_busspace *space, size_t offset,
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u_int8_t value);
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void (*abo_write_2)(struct alpha_busspace *space, size_t offset,
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u_int16_t value);
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void (*abo_write_4)(struct alpha_busspace *space, size_t offset,
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u_int32_t value);
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void (*abo_write_multi_1)(struct alpha_busspace *space,
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size_t offset,
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const u_int8_t *addr, size_t count);
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void (*abo_write_multi_2)(struct alpha_busspace *space,
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size_t offset,
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const u_int16_t *addr, size_t count);
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void (*abo_write_multi_4)(struct alpha_busspace *space,
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size_t offset,
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const u_int32_t *addr, size_t count);
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void (*abo_write_region_1)(struct alpha_busspace *space,
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size_t offset,
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const u_int8_t *addr, size_t count);
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void (*abo_write_region_2)(struct alpha_busspace *space,
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size_t offset,
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const u_int16_t *addr, size_t count);
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void (*abo_write_region_4)(struct alpha_busspace *space,
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size_t offset,
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const u_int32_t *addr, size_t count);
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void (*abo_set_multi_1)(struct alpha_busspace *space, size_t offset,
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u_int8_t value, size_t count);
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void (*abo_set_multi_2)(struct alpha_busspace *space, size_t offset,
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u_int16_t value, size_t count);
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void (*abo_set_multi_4)(struct alpha_busspace *space, size_t offset,
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u_int32_t value, size_t count);
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void (*abo_set_region_1)(struct alpha_busspace *space,
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size_t offset,
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u_int8_t value, size_t count);
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void (*abo_set_region_2)(struct alpha_busspace *space,
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size_t offset,
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u_int16_t value, size_t count);
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void (*abo_set_region_4)(struct alpha_busspace *space,
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size_t offset,
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u_int32_t value, size_t count);
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void (*abo_copy_region_1)(struct alpha_busspace *space,
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size_t offset1, size_t offset2,
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size_t count);
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void (*abo_copy_region_2)(struct alpha_busspace *space,
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size_t offset1, size_t offset2,
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size_t count);
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void (*abo_copy_region_4)(struct alpha_busspace *space,
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size_t offset1, size_t offset2,
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size_t count);
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void (*abo_barrier)(struct alpha_busspace *space, size_t offset,
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size_t len, int flags);
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};
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struct alpha_busspace {
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struct alpha_busspace_ops *ab_ops;
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};
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/* Back-compat functions for old ISA drivers */
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extern struct alpha_busspace *busspace_isa_io;
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extern struct alpha_busspace *busspace_isa_mem;
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#define inb(o) bus_space_read_1(busspace_isa_io, o, 0)
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#define inw(o) bus_space_read_2(busspace_isa_io, o, 0)
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#define inl(o) bus_space_read_4(busspace_isa_io, o, 0)
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#define outb(o, v) bus_space_write_1(busspace_isa_io, o, 0, v)
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#define outw(o, v) bus_space_write_2(busspace_isa_io, o, 0, v)
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#define outl(o, v) bus_space_write_4(busspace_isa_io, o, 0, v)
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#define readb(o) bus_space_read_1(busspace_isa_mem, o, 0)
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#define readw(o) bus_space_read_2(busspace_isa_mem, o, 0)
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#define readl(o) bus_space_read_4(busspace_isa_mem, o, 0)
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#define writeb(o, v) bus_space_write_1(busspace_isa_mem, o, 0, v)
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#define writew(o, v) bus_space_write_2(busspace_isa_mem, o, 0, v)
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#define writel(o, v) bus_space_write_4(busspace_isa_mem, o, 0, v)
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#define insb(o, a, c) bus_space_read_multi_1(busspace_isa_io, o, 0, \
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(void*)(a), c)
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#define insw(o, a, c) bus_space_read_multi_2(busspace_isa_io, o, 0, \
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(void*)(a), c)
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#define insl(o, a, c) bus_space_read_multi_4(busspace_isa_io, o, 0, \
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(void*)(a), c)
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#define outsb(o, a, c) bus_space_write_multi_1(busspace_isa_io, o, 0, \
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(void*)(a), c)
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#define outsw(o, a, c) bus_space_write_multi_2(busspace_isa_io, o, 0, \
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(void*)(a), c)
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#define outsl(o, a, c) bus_space_write_multi_4(busspace_isa_io, o, 0, \
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(void*)(a), c)
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#define memcpy_fromio(d, s, c) \
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bus_space_read_region_1(busspace_isa_mem, (uintptr_t)(s), 0, d, c)
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#define memcpy_toio(d, s, c) \
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bus_space_write_region_1(busspace_isa_mem, (uintptr_t)(d), 0, s, c)
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#define memcpy_io(d, s, c) \
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bus_space_copy_region_1(busspace_isa_mem, (uintptr_t)(s), 0, d, 0, c)
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#define memset_io(d, v, c) \
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bus_space_set_region_1(busspace_isa_mem, (uintptr_t)(d), 0, v, c)
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#define memsetw_io(d, v, c) \
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bus_space_set_region_2(busspace_isa_mem, (uintptr_t)(d), 0, v, c)
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static __inline void
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memsetw(void *d, int val, size_t size)
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{
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u_int16_t *sp = d;
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while (size--)
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*sp++ = val;
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}
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void busspace_generic_read_multi_1(struct alpha_busspace *space,
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size_t offset,
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u_int8_t *addr, size_t count);
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void busspace_generic_read_multi_2(struct alpha_busspace *space,
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size_t offset,
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u_int16_t *addr, size_t count);
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void busspace_generic_read_multi_4(struct alpha_busspace *space,
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size_t offset,
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u_int32_t *addr, size_t count);
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void busspace_generic_read_region_1(struct alpha_busspace *space,
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size_t offset,
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u_int8_t *addr, size_t count);
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void busspace_generic_read_region_2(struct alpha_busspace *space,
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size_t offset,
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u_int16_t *addr, size_t count);
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void busspace_generic_read_region_4(struct alpha_busspace *space,
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size_t offset,
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u_int32_t *addr, size_t count);
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void busspace_generic_write_multi_1(struct alpha_busspace *space,
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size_t offset,
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const u_int8_t *addr, size_t count);
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void busspace_generic_write_multi_2(struct alpha_busspace *space,
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size_t offset,
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const u_int16_t *addr, size_t count);
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void busspace_generic_write_multi_4(struct alpha_busspace *space,
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size_t offset,
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const u_int32_t *addr, size_t count);
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void busspace_generic_write_region_1(struct alpha_busspace *space,
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size_t offset,
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const u_int8_t *addr, size_t count);
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void busspace_generic_write_region_2(struct alpha_busspace *space,
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size_t offset,
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const u_int16_t *addr, size_t count);
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void busspace_generic_write_region_4(struct alpha_busspace *space,
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size_t offset,
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const u_int32_t *addr, size_t count);
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void busspace_generic_set_multi_1(struct alpha_busspace *space,
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size_t offset,
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u_int8_t value, size_t count);
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void busspace_generic_set_multi_2(struct alpha_busspace *space,
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size_t offset,
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u_int16_t value, size_t count);
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void busspace_generic_set_multi_4(struct alpha_busspace *space,
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size_t offset,
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u_int32_t value, size_t count);
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void busspace_generic_set_region_1(struct alpha_busspace *space,
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size_t offset,
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u_int8_t value, size_t count);
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void busspace_generic_set_region_2(struct alpha_busspace *space,
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size_t offset,
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u_int16_t value, size_t count);
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void busspace_generic_set_region_4(struct alpha_busspace *space,
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size_t offset,
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u_int32_t value, size_t count);
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void busspace_generic_copy_region_1(struct alpha_busspace *space,
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size_t offset1,
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size_t offset2,
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size_t count);
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void busspace_generic_copy_region_2(struct alpha_busspace *space,
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size_t offset1,
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size_t offset2,
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size_t count);
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void busspace_generic_copy_region_4(struct alpha_busspace *space,
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size_t offset1,
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size_t offset2,
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size_t count);
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void busspace_generic_barrier(struct alpha_busspace *space,
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size_t offset, size_t len,
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int flags);
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#define BUS_SPACE_BARRIER_READ 0x01 /* force read barrier */
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#define BUS_SPACE_BARRIER_WRITE 0x02 /* force write barrier */
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#define bus_space_read_1(t, h, o) \
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(t)->ab_ops->abo_read_1(t, (h)+(o))
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#define bus_space_read_2(t, h, o) \
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(t)->ab_ops->abo_read_2(t, (h)+(o))
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#define bus_space_read_4(t, h, o) \
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(t)->ab_ops->abo_read_4(t, (h)+(o))
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#define bus_space_read_multi_1(t, h, o, a, c) \
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(t)->ab_ops->abo_read_multi_1(t, (h)+(o), a, c)
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#define bus_space_read_multi_2(t, h, o, a, c) \
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(t)->ab_ops->abo_read_multi_2(t, (h)+(o), a, c)
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#define bus_space_read_multi_4(t, h, o, a, c) \
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(t)->ab_ops->abo_read_multi_4(t, (h)+(o), a, c)
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#define bus_space_read_region_1(t, h, o, a, c) \
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(t)->ab_ops->abo_read_region_1(t, (h)+(o), a, c)
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#define bus_space_read_region_2(t, h, o, a, c) \
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(t)->ab_ops->abo_read_region_2(t, (h)+(o), a, c)
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#define bus_space_read_region_4(t, h, o, a, c) \
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(t)->ab_ops->abo_read_region_4(t, (h)+(o), a, c)
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#define bus_space_write_1(t, h, o, v) \
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(t)->ab_ops->abo_write_1(t, (h)+(o), v)
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#define bus_space_write_2(t, h, o, v) \
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(t)->ab_ops->abo_write_2(t, (h)+(o), v)
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#define bus_space_write_4(t, h, o, v) \
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(t)->ab_ops->abo_write_4(t, (h)+(o), v)
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#define bus_space_write_multi_1(t, h, o, a, c) \
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(t)->ab_ops->abo_write_multi_1(t, (h)+(o), a, c)
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#define bus_space_write_multi_2(t, h, o, a, c) \
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(t)->ab_ops->abo_write_multi_2(t, (h)+(o), a, c)
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#define bus_space_write_multi_4(t, h, o, a, c) \
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(t)->ab_ops->abo_write_multi_4(t, (h)+(o), a, c)
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#define bus_space_write_region_1(t, h, o, a, c) \
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(t)->ab_ops->abo_write_region_1(t, (h)+(o), a, c)
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#define bus_space_write_region_2(t, h, o, a, c) \
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(t)->ab_ops->abo_write_region_2(t, (h)+(o), a, c)
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#define bus_space_write_region_4(t, h, o, a, c) \
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(t)->ab_ops->abo_write_region_4(t, (h)+(o), a, c)
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#define bus_space_set_multi_1(t, h, o, v, c) \
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(t)->ab_ops->abo_set_multi_1(t, (h)+(o), v, c)
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#define bus_space_set_multi_2(t, h, o, v, c) \
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(t)->ab_ops->abo_set_multi_2(t, (h)+(o), v, c)
|
|
#define bus_space_set_multi_4(t, h, o, v, c) \
|
|
(t)->ab_ops->abo_set_multi_4(t, (h)+(o), v, c)
|
|
#define bus_space_set_region_1(t, h, o, v, c) \
|
|
(t)->ab_ops->abo_set_region_1(t, (h)+(o), v, c)
|
|
#define bus_space_set_region_2(t, h, o, v, c) \
|
|
(t)->ab_ops->abo_set_region_2(t, (h)+(o), v, c)
|
|
#define bus_space_set_region_4(t, h, o, v, c) \
|
|
(t)->ab_ops->abo_set_region_4(t, (h)+(o), v, c)
|
|
|
|
#define bus_space_copy_region_1(t, h1, o1, h2, o2, c) \
|
|
(t)->ab_ops->abo_copy_region_1(t, (h1)+(o1), (h2)+(o2), c)
|
|
#define bus_space_copy_region_2(t, h1, o1, h2, o2, c) \
|
|
(t)->ab_ops->abo_copy_region_2(t, (h1)+(o1), (h2)+(o2), c)
|
|
#define bus_space_copy_region_4(t, h1, o1, h2, o2, c) \
|
|
(t)->ab_ops->abo_copy_region_4(t, (h1)+(o1), (h2)+(o2), c)
|
|
|
|
#define bus_space_barrier(t, h, o, l, f) \
|
|
(t)->ab_ops->abo_barrier(t, (h)+(o), l, f)
|
|
|
|
/*
|
|
* Stream accesses are the same as normal accesses on alpha; there are no
|
|
* supported bus systems with an endianess different from the host one.
|
|
*/
|
|
#define bus_space_read_stream_1(t, h, o) bus_space_read_1((t), (h), (o))
|
|
#define bus_space_read_stream_2(t, h, o) bus_space_read_2((t), (h), (o))
|
|
#define bus_space_read_stream_4(t, h, o) bus_space_read_4((t), (h), (o))
|
|
|
|
#define bus_space_read_multi_stream_1(t, h, o, a, c) \
|
|
bus_space_read_multi_1((t), (h), (o), (a), (c))
|
|
#define bus_space_read_multi_stream_2(t, h, o, a, c) \
|
|
bus_space_read_multi_2((t), (h), (o), (a), (c))
|
|
#define bus_space_read_multi_stream_4(t, h, o, a, c) \
|
|
bus_space_read_multi_4((t), (h), (o), (a), (c))
|
|
|
|
#define bus_space_write_stream_1(t, h, o, v) \
|
|
bus_space_write_1((t), (h), (o), (v))
|
|
#define bus_space_write_stream_2(t, h, o, v) \
|
|
bus_space_write_2((t), (h), (o), (v))
|
|
#define bus_space_write_stream_4(t, h, o, v) \
|
|
bus_space_write_4((t), (h), (o), (v))
|
|
|
|
#define bus_space_write_multi_stream_1(t, h, o, a, c) \
|
|
bus_space_write_multi_1((t), (h), (o), (a), (c))
|
|
#define bus_space_write_multi_stream_2(t, h, o, a, c) \
|
|
bus_space_write_multi_2((t), (h), (o), (a), (c))
|
|
#define bus_space_write_multi_stream_4(t, h, o, a, c) \
|
|
bus_space_write_multi_4((t), (h), (o), (a), (c))
|
|
|
|
#define bus_space_set_multi_stream_1(t, h, o, v, c) \
|
|
bus_space_set_multi_1((t), (h), (o), (v), (c))
|
|
#define bus_space_set_multi_stream_2(t, h, o, v, c) \
|
|
bus_space_set_multi_2((t), (h), (o), (v), (c))
|
|
#define bus_space_set_multi_stream_4(t, h, o, v, c) \
|
|
bus_space_set_multi_4((t), (h), (o), (v), (c))
|
|
|
|
#define bus_space_read_region_stream_1(t, h, o, a, c) \
|
|
bus_space_read_region_1((t), (h), (o), (a), (c))
|
|
#define bus_space_read_region_stream_2(t, h, o, a, c) \
|
|
bus_space_read_region_2((t), (h), (o), (a), (c))
|
|
#define bus_space_read_region_stream_4(t, h, o, a, c) \
|
|
bus_space_read_region_4((t), (h), (o), (a), (c))
|
|
|
|
#define bus_space_write_region_stream_1(t, h, o, a, c) \
|
|
bus_space_write_region_1((t), (h), (o), (a), (c))
|
|
#define bus_space_write_region_stream_2(t, h, o, a, c) \
|
|
bus_space_write_region_2((t), (h), (o), (a), (c))
|
|
#define bus_space_write_region_stream_4(t, h, o, a, c) \
|
|
bus_space_write_region_4((t), (h), (o), (a), (c))
|
|
|
|
#define bus_space_set_region_stream_1(t, h, o, v, c) \
|
|
bus_space_set_region_1((t), (h), (o), (v), (c))
|
|
#define bus_space_set_region_stream_2(t, h, o, v, c) \
|
|
bus_space_set_region_2((t), (h), (o), (v), (c))
|
|
#define bus_space_set_region_stream_4(t, h, o, v, c) \
|
|
bus_space_set_region_4((t), (h), (o), (v), (c))
|
|
|
|
#define bus_space_copy_region_stream_1(t, h1, o1, h2, o2, c) \
|
|
bus_space_copy_region_1((t), (h1), (o1), (h2), (o2), (c))
|
|
#define bus_space_copy_region_stream_2(t, h1, o1, h2, o2, c) \
|
|
bus_space_copy_region_2((t), (h1), (o1), (h2), (o2), (c))
|
|
#define bus_space_copy_region_stream_4(t, h1, o1, h2, o2, c) \
|
|
bus_space_copy_region_4((t), (h1), (o1), (h2), (o2), (c))
|
|
|
|
/*
|
|
* Flags used in various bus DMA methods.
|
|
*/
|
|
#define BUS_DMA_WAITOK 0x00 /* safe to sleep (pseudo-flag) */
|
|
#define BUS_DMA_NOWAIT 0x01 /* not safe to sleep */
|
|
#define BUS_DMA_ALLOCNOW 0x02 /* perform resource allocation now */
|
|
#define BUS_DMA_COHERENT 0x04 /* hint: map memory in a coherent way */
|
|
#define BUS_DMA_ISA 0x10 /* map memory for ISA dma */
|
|
#define BUS_DMA_BUS2 0x20 /* placeholders for bus functions... */
|
|
#define BUS_DMA_BUS3 0x40
|
|
#define BUS_DMA_BUS4 0x80
|
|
|
|
/* Forwards needed by prototypes below. */
|
|
struct mbuf;
|
|
struct uio;
|
|
|
|
/*
|
|
* Operations performed by bus_dmamap_sync().
|
|
*/
|
|
typedef int bus_dmasync_op_t;
|
|
#define BUS_DMASYNC_PREREAD 1
|
|
#define BUS_DMASYNC_POSTREAD 2
|
|
#define BUS_DMASYNC_PREWRITE 4
|
|
#define BUS_DMASYNC_POSTWRITE 8
|
|
|
|
/*
|
|
* bus_dma_tag_t
|
|
*
|
|
* A machine-dependent opaque type describing the characteristics
|
|
* of how to perform DMA mappings. This structure encapsultes
|
|
* information concerning address and alignment restrictions, number
|
|
* of S/G segments, amount of data per S/G segment, etc.
|
|
*/
|
|
typedef struct bus_dma_tag *bus_dma_tag_t;
|
|
|
|
/*
|
|
* bus_dmamap_t
|
|
*
|
|
* DMA mapping instance information.
|
|
*/
|
|
typedef struct bus_dmamap *bus_dmamap_t;
|
|
|
|
/*
|
|
* bus_dma_segment_t
|
|
*
|
|
* Describes a single contiguous DMA transaction. Values
|
|
* are suitable for programming into DMA registers.
|
|
*/
|
|
typedef struct bus_dma_segment {
|
|
bus_addr_t ds_addr; /* DMA address */
|
|
bus_size_t ds_len; /* length of transfer */
|
|
} bus_dma_segment_t;
|
|
|
|
/*
|
|
* A function that returns 1 if the address cannot be accessed by
|
|
* a device and 0 if it can be.
|
|
*/
|
|
typedef int bus_dma_filter_t(void *, bus_addr_t);
|
|
|
|
/*
|
|
* A function that performs driver-specific syncronization on behalf of
|
|
* busdma.
|
|
*/
|
|
typedef enum {
|
|
BUS_DMA_LOCK = 0x01,
|
|
BUS_DMA_UNLOCK = 0x02,
|
|
} bus_dma_lock_op_t;
|
|
|
|
typedef void bus_dma_lock_t(void *, bus_dma_lock_op_t);
|
|
|
|
/*
|
|
* Allocate a device specific dma_tag encapsulating the constraints of
|
|
* the parent tag in addition to other restrictions specified:
|
|
*
|
|
* alignment: alignment for segments.
|
|
* boundary: Boundary that segments cannot cross.
|
|
* lowaddr: Low restricted address that cannot appear in a mapping.
|
|
* highaddr: High restricted address that cannot appear in a mapping.
|
|
* filtfunc: An optional function to further test if an address
|
|
* within the range of lowaddr and highaddr cannot appear
|
|
* in a mapping.
|
|
* filtfuncarg: An argument that will be passed to filtfunc in addition
|
|
* to the address to test.
|
|
* maxsize: Maximum mapping size supported by this tag.
|
|
* nsegments: Number of discontinuities allowed in maps.
|
|
* maxsegsz: Maximum size of a segment in the map.
|
|
* flags: Bus DMA flags.
|
|
* dmat: A pointer to set to a valid dma tag should the return
|
|
* value of this function indicate success.
|
|
*/
|
|
/* XXX Should probably allow specification of alignment */
|
|
int bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignemnt,
|
|
bus_size_t boundary, bus_addr_t lowaddr,
|
|
bus_addr_t highaddr, bus_dma_filter_t *filtfunc,
|
|
void *filtfuncarg, bus_size_t maxsize, int nsegments,
|
|
bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc,
|
|
void *lockfuncarg, bus_dma_tag_t *dmat);
|
|
|
|
int bus_dma_tag_destroy(bus_dma_tag_t dmat);
|
|
|
|
/*
|
|
* Allocate a handle for mapping from kva/uva/physical
|
|
* address space into bus device space.
|
|
*/
|
|
int bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp);
|
|
|
|
/*
|
|
* Destroy a handle for mapping from kva/uva/physical
|
|
* address space into bus device space.
|
|
*/
|
|
int bus_dmamap_destroy(bus_dma_tag_t dmat, bus_dmamap_t map);
|
|
|
|
/*
|
|
* Allocate a piece of memory that can be efficiently mapped into
|
|
* bus device space based on the constraints lited in the dma tag.
|
|
* A dmamap to for use with dmamap_load is also allocated.
|
|
*/
|
|
int bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags,
|
|
bus_dmamap_t *mapp);
|
|
|
|
/*
|
|
* Free a piece of memory and it's allociated dmamap, that was allocated
|
|
* via bus_dmamem_alloc.
|
|
*/
|
|
void bus_dmamem_free(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map);
|
|
|
|
/*
|
|
* A function that processes a successfully loaded dma map or an error
|
|
* from a delayed load map.
|
|
*/
|
|
typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int);
|
|
|
|
/*
|
|
* Map the buffer buf into bus space using the dmamap map.
|
|
*/
|
|
int bus_dmamap_load(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf,
|
|
bus_size_t buflen, bus_dmamap_callback_t *callback,
|
|
void *callback_arg, int flags);
|
|
|
|
/*
|
|
* Like bus_dmamap_callback but includes map size in bytes. This is
|
|
* defined as a separate interface to maintain compatiiblity for users
|
|
* of bus_dmamap_callback_t--at some point these interfaces should be merged.
|
|
*/
|
|
typedef void bus_dmamap_callback2_t(void *, bus_dma_segment_t *, int, bus_size_t, int);
|
|
/*
|
|
* Like bus_dmamap_load but for mbufs. Note the use of the
|
|
* bus_dmamap_callback2_t interface.
|
|
*/
|
|
int bus_dmamap_load_mbuf(bus_dma_tag_t dmat, bus_dmamap_t map,
|
|
struct mbuf *mbuf,
|
|
bus_dmamap_callback2_t *callback, void *callback_arg,
|
|
int flags);
|
|
/*
|
|
* Like bus_dmamap_load but for uios. Note the use of the
|
|
* bus_dmamap_callback2_t interface.
|
|
*/
|
|
int bus_dmamap_load_uio(bus_dma_tag_t dmat, bus_dmamap_t map,
|
|
struct uio *ui,
|
|
bus_dmamap_callback2_t *callback, void *callback_arg,
|
|
int flags);
|
|
|
|
/*
|
|
* Perform a syncronization operation on the given map.
|
|
*/
|
|
void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_dmasync_op_t);
|
|
#define bus_dmamap_sync(dmat, dmamap, op) \
|
|
if ((dmamap) != NULL) \
|
|
_bus_dmamap_sync(dmat, dmamap, op)
|
|
|
|
/*
|
|
* Release the mapping held by map.
|
|
*/
|
|
void _bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map);
|
|
#define bus_dmamap_unload(dmat, dmamap) \
|
|
if ((dmamap) != NULL) \
|
|
_bus_dmamap_unload(dmat, dmamap)
|
|
|
|
/*
|
|
* Generic helper function for manipulating mutexes.
|
|
*/
|
|
void busdma_lock_mutex(void *arg, bus_dma_lock_op_t op);
|
|
|
|
#endif /* _ALPHA_BUS_H_ */
|