bus_defs.h revision 1.10.28.2
1 /* $NetBSD: bus_defs.h,v 1.10.28.2 2018/11/26 01:52:19 pgoyette Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997, 1998, 2001 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 Charles M. Hannum. All rights reserved. 35 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by Christopher G. Demetriou 48 * for the NetBSD Project. 49 * 4. The name of the author may not be used to endorse or promote products 50 * derived from this software without specific prior written permission 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 53 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 54 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 55 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 56 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 57 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 61 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 62 */ 63 64 #ifndef _ARM_BUS_DEFS_H_ 65 #define _ARM_BUS_DEFS_H_ 66 67 #if defined(_KERNEL_OPT) 68 #include "opt_arm_bus_space.h" 69 #endif 70 71 /* 72 * Addresses (in bus space). 73 */ 74 typedef u_long bus_addr_t; 75 typedef u_long bus_size_t; 76 77 #define PRIxBUSADDR "lx" 78 #define PRIxBUSSIZE "lx" 79 #define PRIuBUSSIZE "lu" 80 81 /* 82 * Access methods for bus space. 83 */ 84 typedef struct bus_space *bus_space_tag_t; 85 typedef u_long bus_space_handle_t; 86 87 #define PRIxBSH "lx" 88 89 /* 90 * int bus_space_map(bus_space_tag_t t, bus_addr_t addr, 91 * bus_size_t size, int flags, bus_space_handle_t *bshp); 92 * 93 * Map a region of bus space. 94 */ 95 96 #define BUS_SPACE_MAP_CACHEABLE 0x01 97 #define BUS_SPACE_MAP_LINEAR 0x02 98 #define BUS_SPACE_MAP_PREFETCHABLE 0x04 99 100 struct bus_space { 101 /* cookie */ 102 void *bs_cookie; 103 104 /* used for aarch64. require ".bs_cookie = bus_space" */ 105 int bs_stride; /* offset <<= bs_stride (if needed) */ 106 int bs_flags; 107 108 /* mapping/unmapping */ 109 int (*bs_map)(void *, bus_addr_t, bus_size_t, 110 int, bus_space_handle_t *); 111 void (*bs_unmap)(void *, bus_space_handle_t, 112 bus_size_t); 113 int (*bs_subregion)(void *, bus_space_handle_t, 114 bus_size_t, bus_size_t, bus_space_handle_t *); 115 116 /* allocation/deallocation */ 117 int (*bs_alloc)(void *, bus_addr_t, bus_addr_t, 118 bus_size_t, bus_size_t, bus_size_t, int, 119 bus_addr_t *, bus_space_handle_t *); 120 void (*bs_free)(void *, bus_space_handle_t, 121 bus_size_t); 122 123 /* get kernel virtual address */ 124 void * (*bs_vaddr)(void *, bus_space_handle_t); 125 126 /* mmap bus space for user */ 127 paddr_t (*bs_mmap)(void *, bus_addr_t, off_t, int, int); 128 129 /* barrier */ 130 void (*bs_barrier)(void *, bus_space_handle_t, 131 bus_size_t, bus_size_t, int); 132 133 /* read (single) */ 134 uint8_t (*bs_r_1)(void *, bus_space_handle_t, 135 bus_size_t); 136 uint16_t (*bs_r_2)(void *, bus_space_handle_t, 137 bus_size_t); 138 uint32_t (*bs_r_4)(void *, bus_space_handle_t, 139 bus_size_t); 140 uint64_t (*bs_r_8)(void *, bus_space_handle_t, 141 bus_size_t); 142 143 /* read multiple */ 144 void (*bs_rm_1)(void *, bus_space_handle_t, 145 bus_size_t, uint8_t *, bus_size_t); 146 void (*bs_rm_2)(void *, bus_space_handle_t, 147 bus_size_t, uint16_t *, bus_size_t); 148 void (*bs_rm_4)(void *, bus_space_handle_t, 149 bus_size_t, uint32_t *, bus_size_t); 150 void (*bs_rm_8)(void *, bus_space_handle_t, 151 bus_size_t, uint64_t *, bus_size_t); 152 153 /* read region */ 154 void (*bs_rr_1)(void *, bus_space_handle_t, 155 bus_size_t, uint8_t *, bus_size_t); 156 void (*bs_rr_2)(void *, bus_space_handle_t, 157 bus_size_t, uint16_t *, bus_size_t); 158 void (*bs_rr_4)(void *, bus_space_handle_t, 159 bus_size_t, uint32_t *, bus_size_t); 160 void (*bs_rr_8)(void *, bus_space_handle_t, 161 bus_size_t, uint64_t *, bus_size_t); 162 163 /* write (single) */ 164 void (*bs_w_1)(void *, bus_space_handle_t, 165 bus_size_t, uint8_t); 166 void (*bs_w_2)(void *, bus_space_handle_t, 167 bus_size_t, uint16_t); 168 void (*bs_w_4)(void *, bus_space_handle_t, 169 bus_size_t, uint32_t); 170 void (*bs_w_8)(void *, bus_space_handle_t, 171 bus_size_t, uint64_t); 172 173 /* write multiple */ 174 void (*bs_wm_1)(void *, bus_space_handle_t, 175 bus_size_t, const uint8_t *, bus_size_t); 176 void (*bs_wm_2)(void *, bus_space_handle_t, 177 bus_size_t, const uint16_t *, bus_size_t); 178 void (*bs_wm_4)(void *, bus_space_handle_t, 179 bus_size_t, const uint32_t *, bus_size_t); 180 void (*bs_wm_8)(void *, bus_space_handle_t, 181 bus_size_t, const uint64_t *, bus_size_t); 182 183 /* write region */ 184 void (*bs_wr_1)(void *, bus_space_handle_t, 185 bus_size_t, const uint8_t *, bus_size_t); 186 void (*bs_wr_2)(void *, bus_space_handle_t, 187 bus_size_t, const uint16_t *, bus_size_t); 188 void (*bs_wr_4)(void *, bus_space_handle_t, 189 bus_size_t, const uint32_t *, bus_size_t); 190 void (*bs_wr_8)(void *, bus_space_handle_t, 191 bus_size_t, const uint64_t *, bus_size_t); 192 193 /* set multiple */ 194 void (*bs_sm_1)(void *, bus_space_handle_t, 195 bus_size_t, uint8_t, bus_size_t); 196 void (*bs_sm_2)(void *, bus_space_handle_t, 197 bus_size_t, uint16_t, bus_size_t); 198 void (*bs_sm_4)(void *, bus_space_handle_t, 199 bus_size_t, uint32_t, bus_size_t); 200 void (*bs_sm_8)(void *, bus_space_handle_t, 201 bus_size_t, uint64_t, bus_size_t); 202 203 /* set region */ 204 void (*bs_sr_1)(void *, bus_space_handle_t, 205 bus_size_t, uint8_t, bus_size_t); 206 void (*bs_sr_2)(void *, bus_space_handle_t, 207 bus_size_t, uint16_t, bus_size_t); 208 void (*bs_sr_4)(void *, bus_space_handle_t, 209 bus_size_t, uint32_t, bus_size_t); 210 void (*bs_sr_8)(void *, bus_space_handle_t, 211 bus_size_t, uint64_t, bus_size_t); 212 213 /* copy */ 214 void (*bs_c_1)(void *, bus_space_handle_t, bus_size_t, 215 bus_space_handle_t, bus_size_t, bus_size_t); 216 void (*bs_c_2)(void *, bus_space_handle_t, bus_size_t, 217 bus_space_handle_t, bus_size_t, bus_size_t); 218 void (*bs_c_4)(void *, bus_space_handle_t, bus_size_t, 219 bus_space_handle_t, bus_size_t, bus_size_t); 220 void (*bs_c_8)(void *, bus_space_handle_t, bus_size_t, 221 bus_space_handle_t, bus_size_t, bus_size_t); 222 223 #ifdef __BUS_SPACE_HAS_STREAM_METHODS 224 /* read stream (single) */ 225 uint8_t (*bs_r_1_s)(void *, bus_space_handle_t, 226 bus_size_t); 227 uint16_t (*bs_r_2_s)(void *, bus_space_handle_t, 228 bus_size_t); 229 uint32_t (*bs_r_4_s)(void *, bus_space_handle_t, 230 bus_size_t); 231 uint64_t (*bs_r_8_s)(void *, bus_space_handle_t, 232 bus_size_t); 233 234 /* read multiple stream */ 235 void (*bs_rm_1_s)(void *, bus_space_handle_t, 236 bus_size_t, uint8_t *, bus_size_t); 237 void (*bs_rm_2_s)(void *, bus_space_handle_t, 238 bus_size_t, uint16_t *, bus_size_t); 239 void (*bs_rm_4_s)(void *, bus_space_handle_t, 240 bus_size_t, uint32_t *, bus_size_t); 241 void (*bs_rm_8_s)(void *, bus_space_handle_t, 242 bus_size_t, uint64_t *, bus_size_t); 243 244 /* read region stream */ 245 void (*bs_rr_1_s)(void *, bus_space_handle_t, 246 bus_size_t, uint8_t *, bus_size_t); 247 void (*bs_rr_2_s)(void *, bus_space_handle_t, 248 bus_size_t, uint16_t *, bus_size_t); 249 void (*bs_rr_4_s)(void *, bus_space_handle_t, 250 bus_size_t, uint32_t *, bus_size_t); 251 void (*bs_rr_8_s)(void *, bus_space_handle_t, 252 bus_size_t, uint64_t *, bus_size_t); 253 254 /* write stream (single) */ 255 void (*bs_w_1_s)(void *, bus_space_handle_t, 256 bus_size_t, uint8_t); 257 void (*bs_w_2_s)(void *, bus_space_handle_t, 258 bus_size_t, uint16_t); 259 void (*bs_w_4_s)(void *, bus_space_handle_t, 260 bus_size_t, uint32_t); 261 void (*bs_w_8_s)(void *, bus_space_handle_t, 262 bus_size_t, uint64_t); 263 264 /* write multiple stream */ 265 void (*bs_wm_1_s)(void *, bus_space_handle_t, 266 bus_size_t, const uint8_t *, bus_size_t); 267 void (*bs_wm_2_s)(void *, bus_space_handle_t, 268 bus_size_t, const uint16_t *, bus_size_t); 269 void (*bs_wm_4_s)(void *, bus_space_handle_t, 270 bus_size_t, const uint32_t *, bus_size_t); 271 void (*bs_wm_8_s)(void *, bus_space_handle_t, 272 bus_size_t, const uint64_t *, bus_size_t); 273 274 /* write region stream */ 275 void (*bs_wr_1_s)(void *, bus_space_handle_t, 276 bus_size_t, const uint8_t *, bus_size_t); 277 void (*bs_wr_2_s)(void *, bus_space_handle_t, 278 bus_size_t, const uint16_t *, bus_size_t); 279 void (*bs_wr_4_s)(void *, bus_space_handle_t, 280 bus_size_t, const uint32_t *, bus_size_t); 281 void (*bs_wr_8_s)(void *, bus_space_handle_t, 282 bus_size_t, const uint64_t *, bus_size_t); 283 #endif /* __BUS_SPACE_HAS_STREAM_METHODS */ 284 285 #ifdef __BUS_SPACE_HAS_PROBING_METHODS 286 /* peek */ 287 int (*bs_pe_1)(void *, bus_space_handle_t, 288 bus_size_t, uint8_t *); 289 int (*bs_pe_2)(void *, bus_space_handle_t, 290 bus_size_t, uint16_t *); 291 int (*bs_pe_4)(void *, bus_space_handle_t, 292 bus_size_t, uint32_t *); 293 int (*bs_pe_8)(void *, bus_space_handle_t, 294 bus_size_t, uint64_t *); 295 296 /* poke */ 297 int (*bs_po_1)(void *, bus_space_handle_t, 298 bus_size_t, uint8_t); 299 int (*bs_po_2)(void *, bus_space_handle_t, 300 bus_size_t, uint16_t); 301 int (*bs_po_4)(void *, bus_space_handle_t, 302 bus_size_t, uint32_t); 303 int (*bs_po_8)(void *, bus_space_handle_t, 304 bus_size_t, uint64_t); 305 #endif /* __BUS_SPACE_HAS_PROBING_METHODS */ 306 }; 307 308 #define BUS_SPACE_BARRIER_READ 0x01 309 #define BUS_SPACE_BARRIER_WRITE 0x02 310 311 #define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t) 312 313 /* Bus Space DMA macros */ 314 315 /* 316 * Flags used in various bus DMA methods. 317 */ 318 #define BUS_DMA_WAITOK 0x000 /* safe to sleep (pseudo-flag) */ 319 #define BUS_DMA_NOWAIT 0x001 /* not safe to sleep */ 320 #define BUS_DMA_ALLOCNOW 0x002 /* perform resource allocation now */ 321 #define BUS_DMA_COHERENT 0x004 /* hint: map memory DMA coherent */ 322 #define BUS_DMA_STREAMING 0x008 /* hint: sequential, unidirectional */ 323 #define BUS_DMA_BUS1 0x010 /* placeholders for bus functions... */ 324 #define BUS_DMA_BUS2 0x020 325 #define BUS_DMA_BUS3 0x040 326 #define BUS_DMA_BUS4 0x080 327 #define BUS_DMA_READ 0x100 /* mapping is device -> memory only */ 328 #define BUS_DMA_WRITE 0x200 /* mapping is memory -> device only */ 329 #define BUS_DMA_NOCACHE 0x400 /* hint: map non-cached memory */ 330 331 /* 332 * Private flags stored in the DMA map. 333 */ 334 #define _BUS_DMAMAP_COHERENT 0x10000 /* no cache flush necessary on sync */ 335 #define _BUS_DMAMAP_IS_BOUNCING 0x20000 /* is bouncing current xfer */ 336 #define _BUS_DMAMAP_NOALLOC 0x40000 /* don't alloc memory from this range */ 337 338 /* Forwards needed by prototypes below. */ 339 struct mbuf; 340 struct uio; 341 342 /* 343 * Operations performed by bus_dmamap_sync(). 344 */ 345 #define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */ 346 #define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */ 347 #define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */ 348 #define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */ 349 350 typedef struct arm32_bus_dma_tag *bus_dma_tag_t; 351 typedef struct arm32_bus_dmamap *bus_dmamap_t; 352 353 #define BUS_DMA_TAG_VALID(t) ((t) != (bus_dma_tag_t)0) 354 355 /* 356 * bus_dma_segment_t 357 * 358 * Describes a single contiguous DMA transaction. Values 359 * are suitable for programming into DMA registers. 360 */ 361 struct arm32_bus_dma_segment { 362 /* 363 * PUBLIC MEMBERS: these are used by machine-independent code. 364 */ 365 bus_addr_t ds_addr; /* DMA address */ 366 bus_size_t ds_len; /* length of transfer */ 367 368 /* 369 * PRIVATE MEMBERS: 370 */ 371 uint32_t _ds_flags; /* _BUS_DMAMAP_COHERENT */ 372 }; 373 typedef struct arm32_bus_dma_segment bus_dma_segment_t; 374 375 /* 376 * arm32_dma_range 377 * 378 * This structure describes a valid DMA range. 379 */ 380 struct arm32_dma_range { 381 bus_addr_t dr_sysbase; /* system base address */ 382 bus_addr_t dr_busbase; /* appears here on bus */ 383 bus_size_t dr_len; /* length of range */ 384 uint32_t dr_flags; /* flags for range */ 385 }; 386 387 /* 388 * bus_dma_tag_t 389 * 390 * A machine-dependent opaque type describing the implementation of 391 * DMA for a given bus. 392 */ 393 394 struct arm32_bus_dma_tag { 395 /* 396 * DMA range for this tag. If the page doesn't fall within 397 * one of these ranges, an error is returned. The caller 398 * may then decide what to do with the transfer. If the 399 * range pointer is NULL, it is ignored. 400 */ 401 struct arm32_dma_range *_ranges; 402 int _nranges; 403 404 /* 405 * Opaque cookie for use by back-end. 406 */ 407 void *_cookie; 408 409 /* 410 * DMA mapping methods. 411 */ 412 int (*_dmamap_create)(bus_dma_tag_t, bus_size_t, int, 413 bus_size_t, bus_size_t, int, bus_dmamap_t *); 414 void (*_dmamap_destroy)(bus_dma_tag_t, bus_dmamap_t); 415 int (*_dmamap_load)(bus_dma_tag_t, bus_dmamap_t, void *, 416 bus_size_t, struct proc *, int); 417 int (*_dmamap_load_mbuf)(bus_dma_tag_t, bus_dmamap_t, 418 struct mbuf *, int); 419 int (*_dmamap_load_uio)(bus_dma_tag_t, bus_dmamap_t, 420 struct uio *, int); 421 int (*_dmamap_load_raw)(bus_dma_tag_t, bus_dmamap_t, 422 bus_dma_segment_t *, int, bus_size_t, int); 423 void (*_dmamap_unload)(bus_dma_tag_t, bus_dmamap_t); 424 void (*_dmamap_sync_pre)(bus_dma_tag_t, bus_dmamap_t, 425 bus_addr_t, bus_size_t, int); 426 void (*_dmamap_sync_post)(bus_dma_tag_t, bus_dmamap_t, 427 bus_addr_t, bus_size_t, int); 428 429 /* 430 * DMA memory utility functions. 431 */ 432 int (*_dmamem_alloc)(bus_dma_tag_t, bus_size_t, bus_size_t, 433 bus_size_t, bus_dma_segment_t *, int, int *, int); 434 void (*_dmamem_free)(bus_dma_tag_t, 435 bus_dma_segment_t *, int); 436 int (*_dmamem_map)(bus_dma_tag_t, bus_dma_segment_t *, 437 int, size_t, void **, int); 438 void (*_dmamem_unmap)(bus_dma_tag_t, void *, size_t); 439 paddr_t (*_dmamem_mmap)(bus_dma_tag_t, bus_dma_segment_t *, 440 int, off_t, int, int); 441 442 /* 443 * DMA tag utility functions 444 */ 445 int (*_dmatag_subregion)(bus_dma_tag_t, bus_addr_t, bus_addr_t, 446 bus_dma_tag_t *, int); 447 void (*_dmatag_destroy)(bus_dma_tag_t); 448 449 /* 450 * State for bounce buffers 451 */ 452 int _tag_needs_free; 453 int (*_may_bounce)(bus_dma_tag_t, bus_dmamap_t, int, int *); 454 }; 455 456 /* 457 * bus_dmamap_t 458 * 459 * Describes a DMA mapping. 460 */ 461 struct arm32_bus_dmamap { 462 /* 463 * PRIVATE MEMBERS: not for use by machine-independent code. 464 */ 465 bus_size_t _dm_size; /* largest DMA transfer mappable */ 466 int _dm_segcnt; /* number of segs this map can map */ 467 bus_size_t _dm_maxmaxsegsz; /* fixed largest possible segment */ 468 bus_size_t _dm_boundary; /* don't cross this */ 469 int _dm_flags; /* misc. flags */ 470 471 void *_dm_origbuf; /* pointer to original buffer */ 472 int _dm_buftype; /* type of buffer */ 473 struct vmspace *_dm_vmspace; /* vmspace that owns the mapping */ 474 475 void *_dm_cookie; /* cookie for bus-specific functions */ 476 477 /* 478 * PUBLIC MEMBERS: these are used by machine-independent code. 479 */ 480 bus_size_t dm_maxsegsz; /* largest possible segment */ 481 bus_size_t dm_mapsize; /* size of the mapping */ 482 int dm_nsegs; /* # valid segments in mapping */ 483 bus_dma_segment_t dm_segs[1]; /* segments; variable length */ 484 }; 485 486 /* _dm_buftype */ 487 #define _BUS_DMA_BUFTYPE_INVALID 0 488 #define _BUS_DMA_BUFTYPE_LINEAR 1 489 #define _BUS_DMA_BUFTYPE_MBUF 2 490 #define _BUS_DMA_BUFTYPE_UIO 3 491 #define _BUS_DMA_BUFTYPE_RAW 4 492 493 #ifdef _ARM32_BUS_DMA_PRIVATE 494 #define _BUS_AVAIL_END physical_end 495 /* 496 * Cookie used for bounce buffers. A pointer to one of these it stashed in 497 * the DMA map. 498 */ 499 struct arm32_bus_dma_cookie { 500 int id_flags; /* flags; see below */ 501 502 /* 503 * Information about the original buffer used during 504 * DMA map syncs. Note that origibuflen is only used 505 * for ID_BUFTYPE_LINEAR. 506 */ 507 union { 508 void *un_origbuf; /* pointer to orig buffer if 509 bouncing */ 510 char *un_linearbuf; 511 struct mbuf *un_mbuf; 512 struct uio *un_uio; 513 } id_origbuf_un; 514 #define id_origbuf id_origbuf_un.un_origbuf 515 #define id_origlinearbuf id_origbuf_un.un_linearbuf 516 #define id_origmbuf id_origbuf_un.un_mbuf 517 #define id_origuio id_origbuf_un.un_uio 518 bus_size_t id_origbuflen; /* ...and size */ 519 520 void *id_bouncebuf; /* pointer to the bounce buffer */ 521 bus_size_t id_bouncebuflen; /* ...and size */ 522 int id_nbouncesegs; /* number of valid bounce segs */ 523 bus_dma_segment_t id_bouncesegs[0]; /* array of bounce buffer 524 physical memory segments */ 525 }; 526 527 /* id_flags */ 528 #define _BUS_DMA_IS_BOUNCING 0x04 /* is bouncing current xfer */ 529 #define _BUS_DMA_HAS_BOUNCE 0x02 /* has bounce buffers */ 530 #endif /* _ARM32_BUS_DMA_PRIVATE */ 531 #define _BUS_DMA_MIGHT_NEED_BOUNCE 0x01 /* may need bounce buffers */ 532 533 #endif /* _ARM_BUS_DEFS_H_ */ 534
Indexes created Sat Nov 01 05:10:12 GMT 2025