bus_defs.h revision 1.1
1 /* $NetBSD: bus_defs.h,v 1.1 2011/07/19 15:31:44 dyoung Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998, 2000, 2001, 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1996 Carnegie-Mellon University. 35 * All rights reserved. 36 * 37 * Author: Chris G. Demetriou 38 * 39 * Permission to use, copy, modify and distribute this software and 40 * its documentation is hereby granted, provided that both the copyright 41 * notice and this permission notice appear in all copies of the 42 * software, derivative works or modified versions, and any portions 43 * thereof, and that both notices appear in supporting documentation. 44 * 45 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 46 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 47 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 48 * 49 * Carnegie Mellon requests users of this software to return to 50 * 51 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 52 * School of Computer Science 53 * Carnegie Mellon University 54 * Pittsburgh PA 15213-3890 55 * 56 * any improvements or extensions that they make and grant Carnegie the 57 * rights to redistribute these changes. 58 */ 59 60 #ifndef _HPCSH_BUS_DEFS_H_ 61 #define _HPCSH_BUS_DEFS_H_ 62 63 #ifdef _KERNEL 64 /* 65 * Turn on BUS_SPACE_DEBUG if the global DEBUG option is enabled. 66 */ 67 #if defined(DEBUG) && !defined(BUS_SPACE_DEBUG) 68 #define BUS_SPACE_DEBUG 69 #endif 70 71 #ifdef BUS_SPACE_DEBUG 72 #include <sys/systm.h> /* for printf() prototype */ 73 /* 74 * Macros for checking the aligned-ness of pointers passed to bus 75 * space ops. Strict alignment is required by the Alpha architecture, 76 * and a trap will occur if unaligned access is performed. These 77 * may aid in the debugging of a broken device driver by displaying 78 * useful information about the problem. 79 */ 80 #define __BUS_SPACE_ALIGNED_ADDRESS(p, t) \ 81 ((((u_long)(p)) & (sizeof(t)-1)) == 0) 82 83 #define __BUS_SPACE_ADDRESS_SANITY(p, t, d) \ 84 ({ \ 85 if (__BUS_SPACE_ALIGNED_ADDRESS((p), t) == 0) { \ 86 printf("%s 0x%lx not aligned to %lu bytes %s:%d\n", \ 87 d, (u_long)(p), (u_long)sizeof(t), __FILE__, __LINE__); \ 88 } \ 89 (void) 0; \ 90 }) 91 92 #define BUS_SPACE_ALIGNED_POINTER(p, t) __BUS_SPACE_ALIGNED_ADDRESS(p, t) 93 #else 94 #define __BUS_SPACE_ADDRESS_SANITY(p, t, d) (void) 0 95 #define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t) 96 #endif /* BUS_SPACE_DEBUG */ 97 #endif /* _KERNEL */ 98 99 /* 100 * Addresses (in bus space). 101 */ 102 typedef u_long bus_addr_t; 103 typedef u_long bus_size_t; 104 105 /* 106 * Access methods for bus space. 107 */ 108 typedef struct hpcsh_bus_space *bus_space_tag_t; 109 typedef u_long bus_space_handle_t; 110 111 struct extent; /* forward declaration */ 112 113 struct hpcsh_bus_space { 114 struct extent *hbs_extent; 115 bus_addr_t hbs_base_addr; 116 117 /* cookie */ 118 void *hbs_cookie; 119 120 int hbs_flags; 121 #define HBS_FLAGS_ALLOCATED (1 < 0) 122 123 /* mapping/unmapping */ 124 int (*hbs_map)(void *, bus_addr_t, bus_size_t, 125 int, bus_space_handle_t *); 126 void (*hbs_unmap)(void *, bus_space_handle_t, 127 bus_size_t); 128 int (*hbs_subregion)(void *, bus_space_handle_t, 129 bus_size_t, bus_size_t, bus_space_handle_t *); 130 131 /* allocation/deallocation */ 132 int (*hbs_alloc)(void *, bus_addr_t, bus_addr_t, 133 bus_size_t, bus_size_t, bus_size_t, int, 134 bus_addr_t *, bus_space_handle_t *); 135 void (*hbs_free)(void *, bus_space_handle_t, 136 bus_size_t); 137 138 /* get kernel virtual address */ 139 void * (*hbs_vaddr)(void *, bus_space_handle_t); 140 141 /* read (single) */ 142 uint8_t (*hbs_r_1)(void *, bus_space_handle_t, 143 bus_size_t); 144 uint16_t (*hbs_r_2)(void *, bus_space_handle_t, 145 bus_size_t); 146 uint32_t (*hbs_r_4)(void *, bus_space_handle_t, 147 bus_size_t); 148 uint64_t (*hbs_r_8)(void *, bus_space_handle_t, 149 bus_size_t); 150 151 /* read multiple */ 152 void (*hbs_rm_1)(void *, bus_space_handle_t, 153 bus_size_t, uint8_t *, bus_size_t); 154 void (*hbs_rm_2)(void *, bus_space_handle_t, 155 bus_size_t, uint16_t *, bus_size_t); 156 void (*hbs_rm_4)(void *, bus_space_handle_t, 157 bus_size_t, uint32_t *, bus_size_t); 158 void (*hbs_rm_8)(void *, bus_space_handle_t, 159 bus_size_t, uint64_t *, bus_size_t); 160 161 /* read region */ 162 void (*hbs_rr_1)(void *, bus_space_handle_t, 163 bus_size_t, uint8_t *, bus_size_t); 164 void (*hbs_rr_2)(void *, bus_space_handle_t, 165 bus_size_t, uint16_t *, bus_size_t); 166 void (*hbs_rr_4)(void *, bus_space_handle_t, 167 bus_size_t, uint32_t *, bus_size_t); 168 void (*hbs_rr_8)(void *, bus_space_handle_t, 169 bus_size_t, uint64_t *, bus_size_t); 170 171 /* write (single) */ 172 void (*hbs_w_1)(void *, bus_space_handle_t, 173 bus_size_t, uint8_t); 174 void (*hbs_w_2)(void *, bus_space_handle_t, 175 bus_size_t, uint16_t); 176 void (*hbs_w_4)(void *, bus_space_handle_t, 177 bus_size_t, uint32_t); 178 void (*hbs_w_8)(void *, bus_space_handle_t, 179 bus_size_t, uint64_t); 180 181 /* write multiple */ 182 void (*hbs_wm_1)(void *, bus_space_handle_t, 183 bus_size_t, const uint8_t *, bus_size_t); 184 void (*hbs_wm_2)(void *, bus_space_handle_t, 185 bus_size_t, const uint16_t *, bus_size_t); 186 void (*hbs_wm_4)(void *, bus_space_handle_t, 187 bus_size_t, const uint32_t *, bus_size_t); 188 void (*hbs_wm_8)(void *, bus_space_handle_t, 189 bus_size_t, const uint64_t *, bus_size_t); 190 191 /* write region */ 192 void (*hbs_wr_1)(void *, bus_space_handle_t, 193 bus_size_t, const uint8_t *, bus_size_t); 194 void (*hbs_wr_2)(void *, bus_space_handle_t, 195 bus_size_t, const uint16_t *, bus_size_t); 196 void (*hbs_wr_4)(void *, bus_space_handle_t, 197 bus_size_t, const uint32_t *, bus_size_t); 198 void (*hbs_wr_8)(void *, bus_space_handle_t, 199 bus_size_t, const uint64_t *, bus_size_t); 200 201 /* set multiple */ 202 void (*hbs_sm_1)(void *, bus_space_handle_t, 203 bus_size_t, uint8_t, bus_size_t); 204 void (*hbs_sm_2)(void *, bus_space_handle_t, 205 bus_size_t, uint16_t, bus_size_t); 206 void (*hbs_sm_4)(void *, bus_space_handle_t, 207 bus_size_t, uint32_t, bus_size_t); 208 void (*hbs_sm_8)(void *, bus_space_handle_t, 209 bus_size_t, uint64_t, bus_size_t); 210 211 /* set region */ 212 void (*hbs_sr_1)(void *, bus_space_handle_t, 213 bus_size_t, uint8_t, bus_size_t); 214 void (*hbs_sr_2)(void *, bus_space_handle_t, 215 bus_size_t, uint16_t, bus_size_t); 216 void (*hbs_sr_4)(void *, bus_space_handle_t, 217 bus_size_t, uint32_t, bus_size_t); 218 void (*hbs_sr_8)(void *, bus_space_handle_t, 219 bus_size_t, uint64_t, bus_size_t); 220 221 /* copy */ 222 void (*hbs_c_1)(void *, bus_space_handle_t, bus_size_t, 223 bus_space_handle_t, bus_size_t, bus_size_t); 224 void (*hbs_c_2)(void *, bus_space_handle_t, bus_size_t, 225 bus_space_handle_t, bus_size_t, bus_size_t); 226 void (*hbs_c_4)(void *, bus_space_handle_t, bus_size_t, 227 bus_space_handle_t, bus_size_t, bus_size_t); 228 void (*hbs_c_8)(void *, bus_space_handle_t, bus_size_t, 229 bus_space_handle_t, bus_size_t, bus_size_t); 230 }; 231 232 #define BUS_SPACE_MAP_CACHEABLE 0x01 233 #define BUS_SPACE_MAP_LINEAR 0x02 234 #define BUS_SPACE_MAP_PREFETCHABLE 0x04 235 236 #define BUS_SPACE_BARRIER_READ 0x01 237 #define BUS_SPACE_BARRIER_WRITE 0x02 238 239 /* 240 * Flags used in various bus DMA methods. 241 */ 242 #define BUS_DMA_WAITOK 0x000 /* safe to sleep (pseudo-flag) */ 243 #define BUS_DMA_NOWAIT 0x001 /* not safe to sleep */ 244 #define BUS_DMA_ALLOCNOW 0x002 /* perform resource allocation now */ 245 #define BUS_DMA_COHERENT 0x004 /* map memory to not require sync */ 246 #define BUS_DMA_STREAMING 0x008 /* hint: sequential, unidirectional */ 247 #define BUS_DMA_BUS1 0x010 /* placeholders for bus functions... */ 248 #define BUS_DMA_BUS2 0x020 249 #define BUS_DMA_BUS3 0x040 250 #define BUS_DMA_BUS4 0x080 251 #define BUS_DMA_READ 0x100 /* mapping is device -> memory only */ 252 #define BUS_DMA_WRITE 0x200 /* mapping is memory -> device only */ 253 #define BUS_DMA_NOCACHE 0x400 /* hint: map non-cached memory */ 254 255 /* 256 * Private flags stored in the DMA map. 257 */ 258 #define HPCSH_DMAMAP_COHERENT 0x10000 /* no cache flush necessary on sync */ 259 260 /* Forwards needed by prototypes below. */ 261 struct mbuf; 262 struct uio; 263 264 /* 265 * Operations performed by bus_dmamap_sync(). 266 */ 267 #define BUS_DMASYNC_PREREAD 0x01 268 #define BUS_DMASYNC_POSTREAD 0x02 269 #define BUS_DMASYNC_PREWRITE 0x04 270 #define BUS_DMASYNC_POSTWRITE 0x08 271 272 typedef struct hpcsh_bus_dma_tag *bus_dma_tag_t; 273 typedef struct hpcsh_bus_dmamap *bus_dmamap_t; 274 275 #define BUS_DMA_TAG_VALID(t) ((t) != (bus_dma_tag_t)0) 276 277 /* 278 * bus_dma_segment_t 279 * 280 * Describes a single contiguous DMA transaction. Values 281 * are suitable for programming into DMA registers. 282 */ 283 struct hpcsh_bus_dma_segment { 284 bus_addr_t ds_addr; /* DMA address */ 285 bus_size_t ds_len; /* length of transfer */ 286 bus_addr_t _ds_vaddr; /* virtual address, 0 if invalid */ 287 }; 288 typedef struct hpcsh_bus_dma_segment bus_dma_segment_t; 289 290 /* 291 * bus_dma_tag_t 292 * 293 * A machine-dependent opaque type describing the implementation of 294 * DMA for a given bus. 295 */ 296 297 struct hpcsh_bus_dma_tag { 298 void *_cookie; /* cookie used in the guts */ 299 300 bus_addr_t _wbase; /* DMA window base */ 301 bus_addr_t _physbase; /* physical base of the window */ 302 bus_size_t _wsize; /* size of the window */ 303 304 /* 305 * DMA mapping methods. 306 */ 307 int (*_dmamap_create)(bus_dma_tag_t, bus_size_t, int, 308 bus_size_t, bus_size_t, int, bus_dmamap_t *); 309 void (*_dmamap_destroy)(bus_dma_tag_t, bus_dmamap_t); 310 int (*_dmamap_load)(bus_dma_tag_t, bus_dmamap_t, void *, 311 bus_size_t, struct proc *, int); 312 int (*_dmamap_load_mbuf)(bus_dma_tag_t, bus_dmamap_t, 313 struct mbuf *, int); 314 int (*_dmamap_load_uio)(bus_dma_tag_t, bus_dmamap_t, 315 struct uio *, int); 316 int (*_dmamap_load_raw)(bus_dma_tag_t, bus_dmamap_t, 317 bus_dma_segment_t *, int, bus_size_t, int); 318 void (*_dmamap_unload)(bus_dma_tag_t, bus_dmamap_t); 319 void (*_dmamap_sync)(bus_dma_tag_t, bus_dmamap_t, 320 bus_addr_t, bus_size_t, int); 321 322 /* 323 * DMA memory utility functions. 324 */ 325 int (*_dmamem_alloc)(bus_dma_tag_t, bus_size_t, bus_size_t, 326 bus_size_t, bus_dma_segment_t *, int, int *, int); 327 void (*_dmamem_free)(bus_dma_tag_t, 328 bus_dma_segment_t *, int); 329 int (*_dmamem_map)(bus_dma_tag_t, bus_dma_segment_t *, 330 int, size_t, void **, int); 331 void (*_dmamem_unmap)(bus_dma_tag_t, void *, size_t); 332 paddr_t (*_dmamem_mmap)(bus_dma_tag_t, bus_dma_segment_t *, 333 int, off_t, int, int); 334 }; 335 336 /* 337 * bus_dmamap_t 338 * 339 * Describes a DMA mapping. 340 */ 341 struct hpcsh_bus_dmamap { 342 /* 343 * PRIVATE MEMBERS: not for use my machine-independent code. 344 */ 345 bus_size_t _dm_size; /* largest DMA transfer mappable */ 346 int _dm_segcnt; /* number of segs this map can map */ 347 bus_size_t _dm_maxmaxsegsz; /* fixed largest possible segment */ 348 bus_size_t _dm_boundary; /* don't cross this */ 349 int _dm_flags; /* misc. flags */ 350 struct vmspace *_dm_vmspace; /* vmspace that owns the mapping */ 351 352 /* 353 * Private cookie to be used by the DMA back-end. 354 */ 355 void *_dm_cookie; 356 357 /* 358 * PUBLIC MEMBERS: these are used by machine-independent code. 359 */ 360 bus_size_t dm_maxsegsz; /* largest possible segment */ 361 bus_size_t dm_mapsize; /* size of the mapping */ 362 int dm_nsegs; /* # valid segments in mapping */ 363 bus_dma_segment_t dm_segs[1]; /* segments; variable length */ 364 }; 365 366 #endif /* _HPCSH_BUS_DEFS_H_ */ 367
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