/* $NetBSD: bus.h,v 1.49 2003/06/15 23:08:54 fvdl Exp $ */ /*- * Copyright (c) 1997, 1998, 2000, 2001 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * 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 Carnegie-Mellon University. * All rights reserved. * * Author: Chris G. Demetriou * * Permission to use, copy, modify and distribute this software and * its documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. */ #ifndef _ALPHA_BUS_H_ #define _ALPHA_BUS_H_ #include #ifdef _KERNEL /* * Turn on BUS_SPACE_DEBUG if the global DEBUG option is enabled. */ #if defined(DEBUG) && !defined(BUS_SPACE_DEBUG) #define BUS_SPACE_DEBUG #endif #ifdef BUS_SPACE_DEBUG #include /* for printf() prototype */ /* * Macros for checking the aligned-ness of pointers passed to bus * space ops. Strict alignment is required by the Alpha architecture, * and a trap will occur if unaligned access is performed. These * may aid in the debugging of a broken device driver by displaying * useful information about the problem. */ #define __BUS_SPACE_ALIGNED_ADDRESS(p, t) \ ((((u_long)(p)) & (sizeof(t)-1)) == 0) #define __BUS_SPACE_ADDRESS_SANITY(p, t, d) \ ({ \ if (__BUS_SPACE_ALIGNED_ADDRESS((p), t) == 0) { \ printf("%s 0x%lx not aligned to %lu bytes %s:%d\n", \ d, (u_long)(p), sizeof(t), __FILE__, __LINE__); \ } \ (void) 0; \ }) #define BUS_SPACE_ALIGNED_POINTER(p, t) __BUS_SPACE_ALIGNED_ADDRESS(p, t) #else #define __BUS_SPACE_ADDRESS_SANITY(p, t, d) (void) 0 #define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t) #endif /* BUS_SPACE_DEBUG */ #endif /* _KERNEL */ struct alpha_bus_space_translation; /* * Addresses (in bus space). */ typedef u_long bus_addr_t; typedef u_long bus_size_t; /* * Access methods for bus space. */ typedef struct alpha_bus_space *bus_space_tag_t; typedef u_long bus_space_handle_t; struct alpha_bus_space { /* cookie */ void *abs_cookie; /* mapping/unmapping */ int (*abs_map)(void *, bus_addr_t, bus_size_t, int, bus_space_handle_t *, int); void (*abs_unmap)(void *, bus_space_handle_t, bus_size_t, int); int (*abs_subregion)(void *, bus_space_handle_t, bus_size_t, bus_size_t, bus_space_handle_t *); /* ALPHA SPECIFIC MAPPING METHOD */ int (*abs_translate)(void *, bus_addr_t, bus_size_t, int, struct alpha_bus_space_translation *); int (*abs_get_window)(void *, int, struct alpha_bus_space_translation *); /* allocation/deallocation */ int (*abs_alloc)(void *, bus_addr_t, bus_addr_t, bus_size_t, bus_size_t, bus_size_t, int, bus_addr_t *, bus_space_handle_t *); void (*abs_free)(void *, bus_space_handle_t, bus_size_t); /* get kernel virtual address */ void * (*abs_vaddr)(void *, bus_space_handle_t); /* mmap bus space for user */ paddr_t (*abs_mmap)(void *, bus_addr_t, off_t, int, int); /* barrier */ void (*abs_barrier)(void *, bus_space_handle_t, bus_size_t, bus_size_t, int); /* read (single) */ u_int8_t (*abs_r_1)(void *, bus_space_handle_t, bus_size_t); u_int16_t (*abs_r_2)(void *, bus_space_handle_t, bus_size_t); u_int32_t (*abs_r_4)(void *, bus_space_handle_t, bus_size_t); u_int64_t (*abs_r_8)(void *, bus_space_handle_t, bus_size_t); /* read multiple */ void (*abs_rm_1)(void *, bus_space_handle_t, bus_size_t, u_int8_t *, bus_size_t); void (*abs_rm_2)(void *, bus_space_handle_t, bus_size_t, u_int16_t *, bus_size_t); void (*abs_rm_4)(void *, bus_space_handle_t, bus_size_t, u_int32_t *, bus_size_t); void (*abs_rm_8)(void *, bus_space_handle_t, bus_size_t, u_int64_t *, bus_size_t); /* read region */ void (*abs_rr_1)(void *, bus_space_handle_t, bus_size_t, u_int8_t *, bus_size_t); void (*abs_rr_2)(void *, bus_space_handle_t, bus_size_t, u_int16_t *, bus_size_t); void (*abs_rr_4)(void *, bus_space_handle_t, bus_size_t, u_int32_t *, bus_size_t); void (*abs_rr_8)(void *, bus_space_handle_t, bus_size_t, u_int64_t *, bus_size_t); /* write (single) */ void (*abs_w_1)(void *, bus_space_handle_t, bus_size_t, u_int8_t); void (*abs_w_2)(void *, bus_space_handle_t, bus_size_t, u_int16_t); void (*abs_w_4)(void *, bus_space_handle_t, bus_size_t, u_int32_t); void (*abs_w_8)(void *, bus_space_handle_t, bus_size_t, u_int64_t); /* write multiple */ void (*abs_wm_1)(void *, bus_space_handle_t, bus_size_t, const u_int8_t *, bus_size_t); void (*abs_wm_2)(void *, bus_space_handle_t, bus_size_t, const u_int16_t *, bus_size_t); void (*abs_wm_4)(void *, bus_space_handle_t, bus_size_t, const u_int32_t *, bus_size_t); void (*abs_wm_8)(void *, bus_space_handle_t, bus_size_t, const u_int64_t *, bus_size_t); /* write region */ void (*abs_wr_1)(void *, bus_space_handle_t, bus_size_t, const u_int8_t *, bus_size_t); void (*abs_wr_2)(void *, bus_space_handle_t, bus_size_t, const u_int16_t *, bus_size_t); void (*abs_wr_4)(void *, bus_space_handle_t, bus_size_t, const u_int32_t *, bus_size_t); void (*abs_wr_8)(void *, bus_space_handle_t, bus_size_t, const u_int64_t *, bus_size_t); /* set multiple */ void (*abs_sm_1)(void *, bus_space_handle_t, bus_size_t, u_int8_t, bus_size_t); void (*abs_sm_2)(void *, bus_space_handle_t, bus_size_t, u_int16_t, bus_size_t); void (*abs_sm_4)(void *, bus_space_handle_t, bus_size_t, u_int32_t, bus_size_t); void (*abs_sm_8)(void *, bus_space_handle_t, bus_size_t, u_int64_t, bus_size_t); /* set region */ void (*abs_sr_1)(void *, bus_space_handle_t, bus_size_t, u_int8_t, bus_size_t); void (*abs_sr_2)(void *, bus_space_handle_t, bus_size_t, u_int16_t, bus_size_t); void (*abs_sr_4)(void *, bus_space_handle_t, bus_size_t, u_int32_t, bus_size_t); void (*abs_sr_8)(void *, bus_space_handle_t, bus_size_t, u_int64_t, bus_size_t); /* copy */ void (*abs_c_1)(void *, bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t); void (*abs_c_2)(void *, bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t); void (*abs_c_4)(void *, bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t); void (*abs_c_8)(void *, bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t); }; /* * Translation of an Alpha bus address; INTERNAL USE ONLY. */ struct alpha_bus_space_translation { bus_addr_t abst_bus_start; /* start of bus window */ bus_addr_t abst_bus_end; /* end of bus window */ paddr_t abst_sys_start; /* start of sysBus window */ paddr_t abst_sys_end; /* end of sysBus window */ int abst_addr_shift;/* address shift */ int abst_size_shift;/* size shift */ int abst_flags; /* flags; see below */ }; #define ABST_BWX 0x01 /* use BWX to access the bus */ #define ABST_DENSE 0x02 /* space is dense */ #ifdef _KERNEL /* * Utility macros; INTERNAL USE ONLY. */ #define __abs_c(a,b) __CONCAT(a,b) #define __abs_opname(op,size) __abs_c(__abs_c(__abs_c(abs_,op),_),size) #define __abs_rs(sz, tn, t, h, o) \ (__BUS_SPACE_ADDRESS_SANITY((h) + (o), tn, "bus addr"), \ (*(t)->__abs_opname(r,sz))((t)->abs_cookie, h, o)) #define __abs_ws(sz, tn, t, h, o, v) \ do { \ __BUS_SPACE_ADDRESS_SANITY((h) + (o), tn, "bus addr"); \ (*(t)->__abs_opname(w,sz))((t)->abs_cookie, h, o, v); \ } while (0) #define __abs_nonsingle(type, sz, tn, t, h, o, a, c) \ do { \ __BUS_SPACE_ADDRESS_SANITY((a), tn, "buffer"); \ __BUS_SPACE_ADDRESS_SANITY((h) + (o), tn, "bus addr"); \ (*(t)->__abs_opname(type,sz))((t)->abs_cookie, h, o, a, c); \ } while (0) #define __abs_set(type, sz, tn, t, h, o, v, c) \ do { \ __BUS_SPACE_ADDRESS_SANITY((h) + (o), tn, "bus addr"); \ (*(t)->__abs_opname(type,sz))((t)->abs_cookie, h, o, v, c); \ } while (0) #define __abs_copy(sz, tn, t, h1, o1, h2, o2, cnt) \ do { \ __BUS_SPACE_ADDRESS_SANITY((h1) + (o1), tn, "bus addr 1"); \ __BUS_SPACE_ADDRESS_SANITY((h2) + (o2), tn, "bus addr 2"); \ (*(t)->__abs_opname(c,sz))((t)->abs_cookie, h1, o1, h2, o2, cnt); \ } while (0) /* * Mapping and unmapping operations. */ #define bus_space_map(t, a, s, f, hp) \ (*(t)->abs_map)((t)->abs_cookie, (a), (s), (f), (hp), 1) #define alpha_bus_space_map_noacct(t, a, s, f, hp) \ (*(t)->abs_map)((t)->abs_cookie, (a), (s), (f), (hp), 0) #define bus_space_unmap(t, h, s) \ (*(t)->abs_unmap)((t)->abs_cookie, (h), (s), 1) #define alpha_bus_space_unmap_noacct(t, h, s) \ (*(t)->abs_unmap)((t)->abs_cookie, (h), (s), 0) #define bus_space_subregion(t, h, o, s, hp) \ (*(t)->abs_subregion)((t)->abs_cookie, (h), (o), (s), (hp)) #define alpha_bus_space_translate(t, a, s, f, abst) \ (*(t)->abs_translate)((t)->abs_cookie, (a), (s), (f), (abst)) #define alpha_bus_space_get_window(t, w, abst) \ (*(t)->abs_get_window)((t)->abs_cookie, (w), (abst)) #endif /* _KERNEL */ #define BUS_SPACE_MAP_CACHEABLE 0x01 #define BUS_SPACE_MAP_LINEAR 0x02 #define BUS_SPACE_MAP_PREFETCHABLE 0x04 #ifdef _KERNEL /* * Allocation and deallocation operations. */ #define bus_space_alloc(t, rs, re, s, a, b, f, ap, hp) \ (*(t)->abs_alloc)((t)->abs_cookie, (rs), (re), (s), (a), (b), \ (f), (ap), (hp)) #define bus_space_free(t, h, s) \ (*(t)->abs_free)((t)->abs_cookie, (h), (s)) /* * Get kernel virtual address for ranges mapped BUS_SPACE_MAP_LINEAR. */ #define bus_space_vaddr(t, h) \ (*(t)->abs_vaddr)((t)->abs_cookie, (h)) /* * Mmap bus space for a user application. */ #define bus_space_mmap(t, a, o, p, f) \ (*(t)->abs_mmap)((t)->abs_cookie, (a), (o), (p), (f)) /* * Bus barrier operations. */ #define bus_space_barrier(t, h, o, l, f) \ (*(t)->abs_barrier)((t)->abs_cookie, (h), (o), (l), (f)) #define BUS_SPACE_BARRIER_READ 0x01 #define BUS_SPACE_BARRIER_WRITE 0x02 /* * Bus read (single) operations. */ #define bus_space_read_1(t, h, o) __abs_rs(1,u_int8_t,(t),(h),(o)) #define bus_space_read_2(t, h, o) __abs_rs(2,u_int16_t,(t),(h),(o)) #define bus_space_read_4(t, h, o) __abs_rs(4,u_int32_t,(t),(h),(o)) #define bus_space_read_8(t, h, o) __abs_rs(8,u_int64_t,(t),(h),(o)) /* * Bus read multiple operations. */ #define bus_space_read_multi_1(t, h, o, a, c) \ __abs_nonsingle(rm,1,u_int8_t,(t),(h),(o),(a),(c)) #define bus_space_read_multi_2(t, h, o, a, c) \ __abs_nonsingle(rm,2,u_int16_t,(t),(h),(o),(a),(c)) #define bus_space_read_multi_4(t, h, o, a, c) \ __abs_nonsingle(rm,4,u_int32_t,(t),(h),(o),(a),(c)) #define bus_space_read_multi_8(t, h, o, a, c) \ __abs_nonsingle(rm,8,u_int64_t,(t),(h),(o),(a),(c)) /* * Bus read region operations. */ #define bus_space_read_region_1(t, h, o, a, c) \ __abs_nonsingle(rr,1,u_int8_t,(t),(h),(o),(a),(c)) #define bus_space_read_region_2(t, h, o, a, c) \ __abs_nonsingle(rr,2,u_int16_t,(t),(h),(o),(a),(c)) #define bus_space_read_region_4(t, h, o, a, c) \ __abs_nonsingle(rr,4,u_int32_t,(t),(h),(o),(a),(c)) #define bus_space_read_region_8(t, h, o, a, c) \ __abs_nonsingle(rr,8,u_int64_t,(t),(h),(o),(a),(c)) /* * Bus write (single) operations. */ #define bus_space_write_1(t, h, o, v) __abs_ws(1,u_int8_t,(t),(h),(o),(v)) #define bus_space_write_2(t, h, o, v) __abs_ws(2,u_int16_t,(t),(h),(o),(v)) #define bus_space_write_4(t, h, o, v) __abs_ws(4,u_int32_t,(t),(h),(o),(v)) #define bus_space_write_8(t, h, o, v) __abs_ws(8,u_int64_t,(t),(h),(o),(v)) /* * Bus write multiple operations. */ #define bus_space_write_multi_1(t, h, o, a, c) \ __abs_nonsingle(wm,1,u_int8_t,(t),(h),(o),(a),(c)) #define bus_space_write_multi_2(t, h, o, a, c) \ __abs_nonsingle(wm,2,u_int16_t,(t),(h),(o),(a),(c)) #define bus_space_write_multi_4(t, h, o, a, c) \ __abs_nonsingle(wm,4,u_int32_t,(t),(h),(o),(a),(c)) #define bus_space_write_multi_8(t, h, o, a, c) \ __abs_nonsingle(wm,8,u_int64_t,(t),(h),(o),(a),(c)) /* * Bus write region operations. */ #define bus_space_write_region_1(t, h, o, a, c) \ __abs_nonsingle(wr,1,u_int8_t,(t),(h),(o),(a),(c)) #define bus_space_write_region_2(t, h, o, a, c) \ __abs_nonsingle(wr,2,u_int16_t,(t),(h),(o),(a),(c)) #define bus_space_write_region_4(t, h, o, a, c) \ __abs_nonsingle(wr,4,u_int32_t,(t),(h),(o),(a),(c)) #define bus_space_write_region_8(t, h, o, a, c) \ __abs_nonsingle(wr,8,u_int64_t,(t),(h),(o),(a),(c)) /* * Set multiple operations. */ #define bus_space_set_multi_1(t, h, o, v, c) \ __abs_set(sm,1,u_int8_t,(t),(h),(o),(v),(c)) #define bus_space_set_multi_2(t, h, o, v, c) \ __abs_set(sm,2,u_int16_t,(t),(h),(o),(v),(c)) #define bus_space_set_multi_4(t, h, o, v, c) \ __abs_set(sm,4,u_int32_t,(t),(h),(o),(v),(c)) #define bus_space_set_multi_8(t, h, o, v, c) \ __abs_set(sm,8,u_int64_t,(t),(h),(o),(v),(c)) /* * Set region operations. */ #define bus_space_set_region_1(t, h, o, v, c) \ __abs_set(sr,1,u_int8_t,(t),(h),(o),(v),(c)) #define bus_space_set_region_2(t, h, o, v, c) \ __abs_set(sr,2,u_int16_t,(t),(h),(o),(v),(c)) #define bus_space_set_region_4(t, h, o, v, c) \ __abs_set(sr,4,u_int32_t,(t),(h),(o),(v),(c)) #define bus_space_set_region_8(t, h, o, v, c) \ __abs_set(sr,8,u_int64_t,(t),(h),(o),(v),(c)) /* * Copy region operations. */ #define bus_space_copy_region_1(t, h1, o1, h2, o2, c) \ __abs_copy(1, u_int8_t, (t), (h1), (o1), (h2), (o2), (c)) #define bus_space_copy_region_2(t, h1, o1, h2, o2, c) \ __abs_copy(2, u_int16_t, (t), (h1), (o1), (h2), (o2), (c)) #define bus_space_copy_region_4(t, h1, o1, h2, o2, c) \ __abs_copy(4, u_int32_t, (t), (h1), (o1), (h2), (o2), (c)) #define bus_space_copy_region_8(t, h1, o1, h2, o2, c) \ __abs_copy(8, u_int64_t, (t), (h1), (o1), (h2), (o2), (c)) /* * Bus stream operations--defined in terms of non-stream counterparts */ #define __BUS_SPACE_HAS_STREAM_METHODS 1 #define bus_space_read_stream_1 bus_space_read_1 #define bus_space_read_stream_2 bus_space_read_2 #define bus_space_read_stream_4 bus_space_read_4 #define bus_space_read_stream_8 bus_space_read_8 #define bus_space_read_multi_stream_1 bus_space_read_multi_1 #define bus_space_read_multi_stream_2 bus_space_read_multi_2 #define bus_space_read_multi_stream_4 bus_space_read_multi_4 #define bus_space_read_multi_stream_8 bus_space_read_multi_8 #define bus_space_read_region_stream_1 bus_space_read_region_1 #define bus_space_read_region_stream_2 bus_space_read_region_2 #define bus_space_read_region_stream_4 bus_space_read_region_4 #define bus_space_read_region_stream_8 bus_space_read_region_8 #define bus_space_write_stream_1 bus_space_write_1 #define bus_space_write_stream_2 bus_space_write_2 #define bus_space_write_stream_4 bus_space_write_4 #define bus_space_write_stream_8 bus_space_write_8 #define bus_space_write_multi_stream_1 bus_space_write_multi_1 #define bus_space_write_multi_stream_2 bus_space_write_multi_2 #define bus_space_write_multi_stream_4 bus_space_write_multi_4 #define bus_space_write_multi_stream_8 bus_space_write_multi_8 #define bus_space_write_region_stream_1 bus_space_write_region_1 #define bus_space_write_region_stream_2 bus_space_write_region_2 #define bus_space_write_region_stream_4 bus_space_write_region_4 #define bus_space_write_region_stream_8 bus_space_write_region_8 /* * Bus DMA methods. */ /* * 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 */ /* * Private flags stored in the DMA map. */ #define DMAMAP_NO_COALESCE 0x40000000 /* don't coalesce adjacent segments */ /* Forwards needed by prototypes below. */ struct mbuf; struct uio; struct alpha_sgmap; /* * 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 */ /* * alpha_bus_t * * Busses supported by NetBSD/alpha, used by internal * utility functions. NOT TO BE USED BY MACHINE-INDEPENDENT * CODE! */ typedef enum { ALPHA_BUS_TURBOCHANNEL, ALPHA_BUS_PCI, ALPHA_BUS_EISA, ALPHA_BUS_ISA, ALPHA_BUS_TLSB, } alpha_bus_t; typedef struct alpha_bus_dma_tag *bus_dma_tag_t; typedef struct alpha_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 alpha_bus_dma_segment { bus_addr_t ds_addr; /* DMA address */ bus_size_t ds_len; /* length of transfer */ }; typedef struct alpha_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 alpha_bus_dma_tag { void *_cookie; /* cookie used in the guts */ bus_addr_t _wbase; /* DMA window base */ /* * The following two members are used to chain DMA windows * together. If, during the course of a map load, the * resulting physical memory address is too large to * be addressed by the window, the next window will be * attempted. These would be chained together like so: * * direct -> sgmap -> NULL * or * sgmap -> NULL * or * direct -> NULL * * If the window size is 0, it will not be checked (e.g. * TurboChannel DMA). */ bus_size_t _wsize; struct alpha_bus_dma_tag *_next_window; /* * Some chipsets have a built-in boundary constraint, independent * of what the device requests. This allows that boundary to * be specified. If the device has a more restrictive constraint, * the map will use that, otherwise this boundary will be used. * This value is ignored if 0. */ bus_size_t _boundary; /* * A chipset may have more than one SGMAP window, so SGMAP * windows also get a pointer to their SGMAP state. */ struct alpha_sgmap *_sgmap; /* * The SGMAP MMU implements a prefetch FIFO to keep data * moving down the pipe, when doing host->bus DMA writes. * The threshold (distance until the next page) used to * trigger the prefetch is differnet on different chipsets, * and we need to know what it is in order to know whether * or not to allocate a spill page. */ bus_size_t _pfthresh; /* * Internal-use only utility methods. NOT TO BE USED BY * MACHINE-INDEPENDENT CODE! */ bus_dma_tag_t (*_get_tag)(bus_dma_tag_t, alpha_bus_t); /* * 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 alphabus_dma_get_tag(t, b) \ (*(t)->_get_tag)(t, b) #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) \ (void)(t), \ (*(p)->_dm_window->_dmamap_unload)((p)->_dm_window, (p)) #define bus_dmamap_sync(t, p, o, l, ops) \ (void)(t), \ (*(p)->_dm_window->_dmamap_sync)((p)->_dm_window, (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)) /* * bus_dmamap_t * * Describes a DMA mapping. */ struct alpha_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_maxsegsz; /* largest possible segment */ bus_size_t _dm_boundary; /* don't cross this */ int _dm_flags; /* misc. flags */ /* * Private cookie to be used by the DMA back-end. */ void *_dm_cookie; /* * The DMA window that we ended up being mapped in. */ bus_dma_tag_t _dm_window; /* * 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 */ }; #ifdef _ALPHA_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_direct(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, struct proc *, int); int _bus_dmamap_load_mbuf_direct(bus_dma_tag_t, bus_dmamap_t, struct mbuf *, int); int _bus_dmamap_load_uio_direct(bus_dma_tag_t, bus_dmamap_t, struct uio *, int); int _bus_dmamap_load_raw_direct(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); 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); 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); #endif /* _ALPHA_BUS_DMA_PRIVATE */ #endif /* _KERNEL */ #endif /* _ALPHA_BUS_H_ */