/* $OpenBSD: bus.h,v 1.66 2015/02/27 18:59:43 guenther Exp $ */ /* $NetBSD: bus.h,v 1.6 1996/11/10 03:19:25 thorpej Exp $ */ /*- * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION 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. */ /* * Copyright (c) 1996 Charles M. Hannum. All rights reserved. * Copyright (c) 1996 Jason R. Thorpe. All rights reserved. * Copyright (c) 1996 Christopher G. Demetriou. 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Christopher G. Demetriou * for the NetBSD Project. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * 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 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. */ #ifndef _MACHINE_BUS_H_ #define _MACHINE_BUS_H_ #include #include #include /* * Bus address and size types */ typedef u_long bus_addr_t; typedef u_long bus_size_t; /* * Access methods for bus resources and address space. */ struct i386_bus_space_ops; typedef const struct i386_bus_space_ops *bus_space_tag_t; typedef u_long bus_space_handle_t; int bus_space_map(bus_space_tag_t t, bus_addr_t addr, bus_size_t size, int flags, bus_space_handle_t *bshp); /* like bus_space_map(), but without extent map checking/allocation */ int _bus_space_map(bus_space_tag_t t, bus_addr_t addr, bus_size_t size, int flags, bus_space_handle_t *bshp); void bus_space_unmap(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t size); /* like bus_space_unmap(), but without extent map deallocation */ void _bus_space_unmap(bus_space_tag_t, bus_space_handle_t, bus_size_t, bus_addr_t *); int bus_space_subregion(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp); paddr_t bus_space_mmap(bus_space_tag_t, bus_addr_t, off_t, int, int); int bus_space_alloc(bus_space_tag_t t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size, bus_size_t align, bus_size_t boundary, int flags, bus_addr_t *addrp, bus_space_handle_t *bshp); void bus_space_free(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t size); struct i386_bus_space_ops { /* * u_intN_t bus_space_read_N(bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset); * * Read a 1, 2, 4, or 8 byte quantity from bus space * described by tag/handle/offset. */ u_int8_t (*read_1)(bus_space_handle_t, bus_size_t); u_int16_t (*read_2)(bus_space_handle_t, bus_size_t); u_int32_t (*read_4)(bus_space_handle_t, bus_size_t); #define bus_space_read_1(_t, _h, _o) ((_t)->read_1((_h), (_o))) #define bus_space_read_2(_t, _h, _o) ((_t)->read_2((_h), (_o))) #define bus_space_read_4(_t, _h, _o) ((_t)->read_4((_h), (_o))) #define bus_space_read_raw_2(t, h, o) \ bus_space_read_2((t), (h), (o)) #define bus_space_read_raw_4(t, h, o) \ bus_space_read_4((t), (h), (o)) #if 0 /* Cause a link error for bus_space_read_8 and bus_space_read_raw_8 */ #define bus_space_read_8(t, h, o) !!! bus_space_read_8 unimplemented !!! #define bus_space_read_raw_8(t, h, o) !!! bus_space_read_raw_8 unimplemented !!! #endif /* * void bus_space_read_multi_N(bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * u_intN_t *addr, size_t count); * * Read `count' 1, 2, 4, or 8 byte quantities from bus space * described by tag/handle/offset and copy into buffer provided. */ void (*read_multi_1)(bus_space_handle_t, bus_size_t, u_int8_t *, bus_size_t); void (*read_multi_2)(bus_space_handle_t, bus_size_t, u_int16_t *, bus_size_t); void (*read_multi_4)(bus_space_handle_t, bus_size_t, u_int32_t *, bus_size_t); #define bus_space_read_multi_1(_t, _h, _o, _a, _c) \ ((_t)->read_multi_1((_h), (_o), (_a), (_c))) #define bus_space_read_multi_2(_t, _h, _o, _a, _c) \ ((_t)->read_multi_2((_h), (_o), (_a), (_c))) #define bus_space_read_multi_4(_t, _h, _o, _a, _c) \ ((_t)->read_multi_4((_h), (_o), (_a), (_c))) #if 0 /* Cause a link error for bus_space_read_multi_8 */ #define bus_space_read_multi_8 !!! bus_space_read_multi_8 unimplemented !!! #endif /* * void bus_space_read_raw_multi_N(bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * u_int8_t *addr, size_t count); * * Read `count' bytes in 2, 4 or 8 byte wide quantities from bus space * described by tag/handle/offset and copy into buffer provided. The buffer * must have proper alignment for the N byte wide entities. Furthermore * possible byte-swapping should be done by these functions. */ #define bus_space_read_raw_multi_2(t, h, o, a, c) \ bus_space_read_multi_2((t), (h), (o), (u_int16_t *)(a), (c) >> 1) #define bus_space_read_raw_multi_4(t, h, o, a, c) \ bus_space_read_multi_4((t), (h), (o), (u_int32_t *)(a), (c) >> 2) #if 0 /* Cause a link error for bus_space_read_raw_multi_8 */ #define bus_space_read_raw_multi_8 \ !!! bus_space_read_raw_multi_8 unimplemented !!! #endif /* * void bus_space_read_region_N(bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * u_intN_t *addr, size_t count); * * Read `count' 1, 2, 4, or 8 byte quantities from bus space * described by tag/handle and starting at `offset' and copy into * buffer provided. */ void (*read_region_1)(bus_space_handle_t, bus_size_t, u_int8_t *, bus_size_t); void (*read_region_2)(bus_space_handle_t, bus_size_t, u_int16_t *, bus_size_t); void (*read_region_4)(bus_space_handle_t, bus_size_t, u_int32_t *, bus_size_t); #define bus_space_read_region_1(_t, _h, _o, _a, _c) \ ((_t)->read_region_1((_h), (_o), (_a), (_c))) #define bus_space_read_region_2(_t, _h, _o, _a, _c) \ ((_t)->read_region_2((_h), (_o), (_a), (_c))) #define bus_space_read_region_4(_t, _h, _o, _a, _c) \ ((_t)->read_region_4((_h), (_o), (_a), (_c))) #if 0 /* Cause a link error for bus_space_read_region_8 */ #define bus_space_read_region_8 !!! bus_space_read_region_8 unimplemented !!! #endif /* * void bus_space_read_raw_region_N(bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * u_int8_t *addr, size_t count); * * Read `count' bytes in 2, 4 or 8 byte wide quantities from bus space * described by tag/handle and starting at `offset' and copy into * buffer provided. The buffer must have proper alignment for the N byte * wide entities. Furthermore possible byte-swapping should be done by * these functions. */ #define bus_space_read_raw_region_2(_t, _h, _o, _a, _c) \ ((_t)->read_region_2((_h), (_o), (u_int16_t *)(_a), (_c) >> 1)) #define bus_space_read_raw_region_4(_t, _h, _o, _a, _c) \ ((_t)->read_region_4((_h), (_o), (u_int32_t *)(_a), (_c) >> 2)) #if 0 /* Cause a link error for bus_space_read_raw_region_8 */ #define bus_space_read_raw_region_8 \ !!! bus_space_read_raw_region_8 unimplemented !!! #endif /* * void bus_space_write_N(bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * u_intN_t value); * * Write the 1, 2, 4, or 8 byte value `value' to bus space * described by tag/handle/offset. */ void (*write_1)(bus_space_handle_t, bus_size_t, u_int8_t); void (*write_2)(bus_space_handle_t, bus_size_t, u_int16_t); void (*write_4)(bus_space_handle_t, bus_size_t, u_int32_t); #define bus_space_write_1(_t, _h, _o, _v) \ ((_t)->write_1((_h), (_o), (_v))) #define bus_space_write_2(_t, _h, _o, _v) \ ((_t)->write_2((_h), (_o), (_v))) #define bus_space_write_4(_t, _h, _o, _v) \ ((_t)->write_4((_h), (_o), (_v))) #define bus_space_write_raw_2(t, h, o, v) \ bus_space_write_2((t), (h), (o), (v)) #define bus_space_write_raw_4(t, h, o, v) \ bus_space_write_4((t), (h), (o), (v)) #if 0 /* Cause a link error for bus_space_write_8 and bus_space_write_raw_8 */ #define bus_space_write_8 !!! bus_space_write_8 not implemented !!! #define bus_space_write_raw_8 !!! bus_space_write_raw_8 not implemented !!! #endif /* * void bus_space_write_multi_N(bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * const u_intN_t *addr, size_t count); * * Write `count' 1, 2, 4, or 8 byte quantities from the buffer * provided to bus space described by tag/handle/offset. */ void (*write_multi_1)(bus_space_handle_t, bus_size_t, const u_int8_t *, bus_size_t); void (*write_multi_2)(bus_space_handle_t, bus_size_t, const u_int16_t *, bus_size_t); void (*write_multi_4)(bus_space_handle_t, bus_size_t, const u_int32_t *, bus_size_t); #define bus_space_write_multi_1(_t, _h, _o, _a, _c) \ ((_t)->write_multi_1((_h), (_o), (_a), (_c))) #define bus_space_write_multi_2(_t, _h, _o, _a, _c) \ ((_t)->write_multi_2((_h), (_o), (_a), (_c))) #define bus_space_write_multi_4(_t, _h, _o, _a, _c) \ ((_t)->write_multi_4((_h), (_o), (_a), (_c))) #if 0 /* Cause a link error for bus_space_write_multi_8 */ #define bus_space_write_multi_8(t, h, o, a, c) \ !!! bus_space_write_multi_8 unimplemented !!! #endif /* * void bus_space_write_raw_multi_N(bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * const u_int8_t *addr, size_t count); * * Write `count' bytes in 2, 4 or 8 byte wide quantities from the buffer * provided to bus space described by tag/handle/offset. The buffer * must have proper alignment for the N byte wide entities. Furthermore * possible byte-swapping should be done by these functions. */ #define bus_space_write_raw_multi_2(_t, _h, _o, _a, _c) \ ((_t)->write_multi_2((_h), (_o), (const u_int16_t *)(_a), (_c) >> 1)) #define bus_space_write_raw_multi_4(_t, _h, _o, _a, _c) \ ((_t)->write_multi_4((_h), (_o), (const u_int32_t *)(_a), (_c) >> 2)) #if 0 /* Cause a link error for bus_space_write_raw_multi_8 */ #define bus_space_write_raw_multi_8 \ !!! bus_space_write_raw_multi_8 unimplemented !!! #endif /* * void bus_space_write_region_N(bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * const u_intN_t *addr, size_t count); * * Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided * to bus space described by tag/handle starting at `offset'. */ void (*write_region_1)(bus_space_handle_t, bus_size_t, const u_int8_t *, bus_size_t); void (*write_region_2)(bus_space_handle_t, bus_size_t, const u_int16_t *, bus_size_t); void (*write_region_4)(bus_space_handle_t, bus_size_t, const u_int32_t *, bus_size_t); #define bus_space_write_region_1(_t, _h, _o, _a, _c) \ ((_t)->write_region_1((_h), (_o), (_a), (_c))) #define bus_space_write_region_2(_t, _h, _o, _a, _c) \ ((_t)->write_region_2((_h), (_o), (_a), (_c))) #define bus_space_write_region_4(_t, _h, _o, _a, _c) \ ((_t)->write_region_4((_h), (_o), (_a), (_c))) #if 0 /* Cause a link error for bus_space_write_region_8 */ #define bus_space_write_region_8 \ !!! bus_space_write_region_8 unimplemented !!! #endif /* * void bus_space_write_raw_region_N(bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * const u_int8_t *addr, size_t count); * * Write `count' bytes in 2, 4 or 8 byte wide quantities to bus space * described by tag/handle and starting at `offset' from the * buffer provided. The buffer must have proper alignment for the N byte * wide entities. Furthermore possible byte-swapping should be done by * these functions. */ #define bus_space_write_raw_region_2(_t, _h, _o, _a, _c) \ ((_t)->write_region_2((_h), (_o), (const u_int16_t *)(_a), (_c) >> 1)) #define bus_space_write_raw_region_4(_t, _h, _o, _a, _c) \ ((_t)->write_region_4((_h), (_o), (const u_int32_t *)(_a), (_c) >> 2)) #if 0 /* Cause a link error for bus_space_write_raw_region_8 */ #define bus_space_write_raw_region_8 \ !!! bus_space_write_raw_region_8 unimplemented !!! #endif /* * void bus_space_set_multi_N(bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * u_intN_t val, size_t count); * * Write the 1, 2, 4, or 8 byte value `val' to bus space described * by tag/handle/offset `count' times. */ void (*set_multi_1)(bus_space_handle_t, bus_size_t, u_int8_t, size_t); void (*set_multi_2)(bus_space_handle_t, bus_size_t, u_int16_t, size_t); void (*set_multi_4)(bus_space_handle_t, bus_size_t, u_int32_t, size_t); #define bus_space_set_multi_1(_t, _h, _o, _a, _c) \ ((_t)->set_multi_1((_h), (_o), (_a), (_c))) #define bus_space_set_multi_2(_t, _h, _o, _a, _c) \ ((_t)->set_multi_2((_h), (_o), (_a), (_c))) #define bus_space_set_multi_4(_t, _h, _o, _a, _c) \ ((_t)->set_multi_4((_h), (_o), (_a), (_c))) #if 0 /* Cause a link error for bus_space_set_multi_8 */ #define bus_space_set_multi_8 \ !!! bus_space_set_multi_8 unimplemented !!! #endif /* * void bus_space_set_region_N(bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * u_intN_t val, size_t count); * * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described * by tag/handle starting at `offset'. */ void (*set_region_1)(bus_space_handle_t, bus_size_t, u_int8_t, size_t); void (*set_region_2)(bus_space_handle_t, bus_size_t, u_int16_t, size_t); void (*set_region_4)(bus_space_handle_t, bus_size_t, u_int32_t, size_t); #define bus_space_set_region_1(_t, _h, _o, _a, _c) \ ((_t)->set_region_1((_h), (_o), (_a), (_c))) #define bus_space_set_region_2(_t, _h, _o, _a, _c) \ ((_t)->set_region_2((_h), (_o), (_a), (_c))) #define bus_space_set_region_4(_t, _h, _o, _a, _c) \ ((_t)->set_region_4((_h), (_o), (_a), (_c))) #if 0 /* Cause a link error for bus_space_set_region_8 */ #define bus_space_set_region_8 \ !!! bus_space_set_region_8 unimplemented !!! #endif /* * void bus_space_copy_N(bus_space_tag_t tag, * bus_space_handle_t bsh1, bus_size_t off1, * bus_space_handle_t bsh2, bus_size_t off2, * size_t count); * * Copy `count' 1, 2, 4, or 8 byte values from bus space starting * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2. */ void (*copy_1)(bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, size_t); void (*copy_2)(bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, size_t); void (*copy_4)(bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, size_t); #define bus_space_copy_1(_t, _h1, _o1, _h2, _o2, _c) \ ((_t)->copy_1((_h1), (_o1), (_h2), (_o2), (_c))) #define bus_space_copy_2(_t, _h1, _o1, _h2, _o2, _c) \ ((_t)->copy_2((_h1), (_o1), (_h2), (_o2), (_c))) #define bus_space_copy_4(_t, _h1, _o1, _h2, _o2, _c) \ ((_t)->copy_4((_h1), (_o1), (_h2), (_o2), (_c))) #if 0 /* Cause a link error for bus_space_copy_8 */ #define bus_space_copy_8 \ !!! bus_space_copy_8 unimplemented !!! #endif #define i386_space_copy1(a1, a2, cnt, movs, df) \ __asm volatile(df "\n\trep\n\t" movs : \ "+S" (a1), "+D" (a2), "+c" (cnt) :: "memory", "cc"); #define i386_space_copy(a1, a2, sz, cnt) do { \ if ((void *)(a1) < (void *)(a2)) { \ a1 += ((cnt) - 1) * (sz); a2 += ((cnt) - 1) * (sz); \ switch (sz) { \ case 1: i386_space_copy1(a1,a2,cnt,"movsb","std");break;\ case 2: i386_space_copy1(a1,a2,cnt,"movsw","std");break;\ case 4: i386_space_copy1(a1,a2,cnt,"movsl","std");break;\ } \ __asm volatile("cld"); /* must restore before func ret */ \ } else \ switch (sz) { \ case 1: i386_space_copy1(a1,a2,cnt,"movsb","cld");break;\ case 2: i386_space_copy1(a1,a2,cnt,"movsw","cld");break;\ case 4: i386_space_copy1(a1,a2,cnt,"movsl","cld");break;\ } \ } while (0) /* * void *bus_space_vaddr(bus_space_tag_t, bus_space_handle_t); * * Get the kernel virtual address for the mapped bus space. * Only allowed for regions mapped with BUS_SPACE_MAP_LINEAR. */ void * (*vaddr)(bus_space_handle_t); #define bus_space_vaddr(_t, _h) \ ((_t)->vaddr((_h))) }; /* * 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); * * Note: the i386 does not currently require barriers, but we must * provide the flags to MI code. */ #define bus_space_barrier(t, h, o, l, f) do { \ ((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f)));\ __asm volatile("" : : : "memory"); \ } while (0) #define BUS_SPACE_BARRIER_READ 0x01 /* force read barrier */ #define BUS_SPACE_BARRIER_WRITE 0x02 /* force write barrier */ #define BUS_SPACE_MAP_CACHEABLE 0x0001 #define BUS_SPACE_MAP_LINEAR 0x0002 #define BUS_SPACE_MAP_PREFETCHABLE 0x0008 /* * Values for the i386 bus space tag, not to be used directly by MI code. */ /* space is i/o space */ extern const struct i386_bus_space_ops i386_bus_space_io_ops; #define I386_BUS_SPACE_IO (&i386_bus_space_io_ops) /* space is mem space */ extern const struct i386_bus_space_ops i386_bus_space_mem_ops; #define I386_BUS_SPACE_MEM (&i386_bus_space_mem_ops) /* * Flags used in various bus DMA methods. */ #define BUS_DMA_WAITOK 0x0000 /* safe to sleep (pseudo-flag) */ #define BUS_DMA_NOWAIT 0x0001 /* not safe to sleep */ #define BUS_DMA_ALLOCNOW 0x0002 /* perform resource allocation now */ #define BUS_DMA_COHERENT 0x0004 /* hint: map memory DMA coherent */ #define BUS_DMA_BUS1 0x0010 /* placeholders for bus functions... */ #define BUS_DMA_BUS2 0x0020 #define BUS_DMA_BUS3 0x0040 #define BUS_DMA_24BIT 0x0080 /* isadma map */ #define BUS_DMA_STREAMING 0x0100 /* hint: sequential, unidirectional */ #define BUS_DMA_READ 0x0200 /* mapping is device -> memory only */ #define BUS_DMA_WRITE 0x0400 /* mapping is memory -> device only */ #define BUS_DMA_NOCACHE 0x0800 /* map memory uncached */ #define BUS_DMA_ZERO 0x1000 /* dmamem_alloc return zeroed mem */ /* Forwards needed by prototypes below. */ struct mbuf; struct proc; struct uio; /* * Operations performed by bus_dmamap_sync(). */ #define BUS_DMASYNC_PREREAD 0x01 #define BUS_DMASYNC_POSTREAD 0x02 #define BUS_DMASYNC_PREWRITE 0x04 #define BUS_DMASYNC_POSTWRITE 0x08 typedef struct bus_dma_tag *bus_dma_tag_t; 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. */ struct bus_dma_segment { bus_addr_t ds_addr; /* DMA address */ bus_size_t ds_len; /* length of transfer */ /* * Ugh. need this so can pass alignment down from bus_dmamem_alloc * to scatter gather maps. only the first one is used so the rest is * wasted space. bus_dma could do with fixing the api for this. */ bus_size_t _ds_boundary; /* don't cross */ bus_size_t _ds_align; /* align to me */ }; typedef struct 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 bus_dma_tag { void *_cookie; /* cookie used in the guts */ /* * 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); int (*_dmamem_alloc_range)(bus_dma_tag_t, bus_size_t, bus_size_t, bus_size_t, bus_dma_segment_t *, int, int *, int, bus_addr_t, bus_addr_t); 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_alloc_range(t, s, a, b, sg, n, r, f, l, h) \ (*(t)->_dmamem_alloc_range)((t), (s), (a), (b), (sg), \ (n), (r), (f), (l), (h)) #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)) /* * bus_dmamap_t * * Describes a DMA mapping. */ struct bus_dmamap { /* * PRIVATE MEMBERS: not for use by 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_maxsegsz; /* largest possible segment */ bus_size_t _dm_boundary; /* don't cross this */ int _dm_flags; /* misc. flags */ void *_dm_cookie; /* cookie for bus-specific functions */ /* * PUBLIC MEMBERS: these are used by machine-independent code. */ 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 */ }; 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, paddr_t low, paddr_t high); #endif /* _MACHINE_BUS_H_ */