bus.h revision 1.21
1 /* $NetBSD: bus.h,v 1.21 2019/09/23 16:17:57 skrll 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 #ifndef _NEWSMIPS_BUS_H_ 34 #define _NEWSMIPS_BUS_H_ 35 36 #include <mips/locore.h> 37 38 /* 39 * Utility macros; do not use outside this file. 40 */ 41 #define __PB_TYPENAME_PREFIX(BITS) ___CONCAT(uint,BITS) 42 #define __PB_TYPENAME(BITS) ___CONCAT(__PB_TYPENAME_PREFIX(BITS),_t) 43 44 /* 45 * Bus address and size types 46 */ 47 typedef u_long bus_addr_t; 48 typedef u_long bus_size_t; 49 50 #define PRIxBUSADDR "lx" 51 #define PRIxBUSSIZE "lx" 52 #define PRIuBUSSIZE "lu" 53 54 /* 55 * Access methods for bus resources and address space. 56 */ 57 typedef int bus_space_tag_t; 58 typedef u_long bus_space_handle_t; 59 60 #define PRIxBSH "lx" 61 62 /* 63 * int bus_space_map(bus_space_tag_t t, bus_addr_t addr, 64 * bus_size_t size, int flags, bus_space_handle_t *bshp); 65 * 66 * Map a region of bus space. 67 */ 68 69 #define BUS_SPACE_MAP_CACHEABLE 0x01 70 #define BUS_SPACE_MAP_LINEAR 0x02 71 #define BUS_SPACE_MAP_PREFETCHABLE 0x04 72 73 int bus_space_map(bus_space_tag_t, bus_addr_t, bus_size_t, 74 int, bus_space_handle_t *); 75 76 /* 77 * void bus_space_unmap(bus_space_tag_t t, 78 * bus_space_handle_t bsh, bus_size_t size); 79 * 80 * Unmap a region of bus space. 81 */ 82 83 void bus_space_unmap (bus_space_tag_t, bus_space_handle_t, bus_size_t); 84 85 /* 86 * int bus_space_subregion(bus_space_tag_t t, 87 * bus_space_handle_t bsh, bus_size_t offset, bus_size_t size, 88 * bus_space_handle_t *nbshp); 89 * 90 * Get a new handle for a subregion of an already-mapped area of bus space. 91 */ 92 93 int bus_space_subregion(bus_space_tag_t t, bus_space_handle_t bsh, 94 bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp); 95 96 /* 97 * int bus_space_alloc(bus_space_tag_t t, bus_addr_t, rstart, 98 * bus_addr_t rend, bus_size_t size, bus_size_t align, 99 * bus_size_t boundary, int flags, bus_addr_t *addrp, 100 * bus_space_handle_t *bshp); 101 * 102 * Allocate a region of bus space. 103 */ 104 105 int bus_space_alloc (bus_space_tag_t t, bus_addr_t rstart, 106 bus_addr_t rend, bus_size_t size, bus_size_t align, 107 bus_size_t boundary, int cacheable, bus_addr_t *addrp, 108 bus_space_handle_t *bshp); 109 110 /* 111 * int bus_space_free (bus_space_tag_t t, 112 * bus_space_handle_t bsh, bus_size_t size); 113 * 114 * Free a region of bus space. 115 */ 116 117 void bus_space_free(bus_space_tag_t t, bus_space_handle_t bsh, 118 bus_size_t size); 119 120 /* 121 * uintN_t bus_space_read_N(bus_space_tag_t tag, 122 * bus_space_handle_t bsh, bus_size_t offset); 123 * 124 * Read a 1, 2, 4, or 8 byte quantity from bus space 125 * described by tag/handle/offset. 126 */ 127 128 #define bus_space_read_1(t, h, o) \ 129 ((void) t, (*(volatile uint8_t *)((h) + (o)))) 130 131 #define bus_space_read_2(t, h, o) \ 132 ((void) t, (*(volatile uint16_t *)((h) + (o)))) 133 134 #define bus_space_read_4(t, h, o) \ 135 ((void) t, (*(volatile uint32_t *)((h) + (o)))) 136 137 #if 0 /* Cause a link error for bus_space_read_8 */ 138 #define bus_space_read_8(t, h, o) !!! bus_space_read_8 unimplemented !!! 139 #endif 140 141 /* 142 * void bus_space_read_multi_N(bus_space_tag_t tag, 143 * bus_space_handle_t bsh, bus_size_t offset, 144 * uintN_t *addr, size_t count); 145 * 146 * Read `count' 1, 2, 4, or 8 byte quantities from bus space 147 * described by tag/handle/offset and copy into buffer provided. 148 */ 149 150 #define __NEWSMIPS_bus_space_read_multi(BYTES,BITS) \ 151 static __inline void __CONCAT(bus_space_read_multi_,BYTES) \ 152 (bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 153 __PB_TYPENAME(BITS) *, size_t); \ 154 \ 155 static __inline void \ 156 __CONCAT(bus_space_read_multi_,BYTES)( \ 157 bus_space_tag_t t, \ 158 bus_space_handle_t h, \ 159 bus_size_t o, \ 160 __PB_TYPENAME(BITS) *a, \ 161 size_t c) \ 162 { \ 163 \ 164 while (c--) \ 165 *a++ = __CONCAT(bus_space_read_,BYTES)(t, h, o); \ 166 } 167 168 __NEWSMIPS_bus_space_read_multi(1,8) 169 __NEWSMIPS_bus_space_read_multi(2,16) 170 __NEWSMIPS_bus_space_read_multi(4,32) 171 172 #if 0 /* Cause a link error for bus_space_read_multi_8 */ 173 #define bus_space_read_multi_8 !!! bus_space_read_multi_8 unimplemented !!! 174 #endif 175 176 #undef __NEWSMIPS_bus_space_read_multi 177 178 /* 179 * void bus_space_read_region_N(bus_space_tag_t tag, 180 * bus_space_handle_t bsh, bus_size_t offset, 181 * uintN_t *addr, size_t count); 182 * 183 * Read `count' 1, 2, 4, or 8 byte quantities from bus space 184 * described by tag/handle and starting at `offset' and copy into 185 * buffer provided. 186 */ 187 188 #define __NEWSMIPS_bus_space_read_region(BYTES,BITS) \ 189 static __inline void __CONCAT(bus_space_read_region_,BYTES) \ 190 (bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 191 __PB_TYPENAME(BITS) *, size_t); \ 192 \ 193 static __inline void \ 194 __CONCAT(bus_space_read_region_,BYTES)( \ 195 bus_space_tag_t t, \ 196 bus_space_handle_t h, \ 197 bus_size_t o, \ 198 __PB_TYPENAME(BITS) *a, \ 199 size_t c) \ 200 { \ 201 \ 202 while (c--) { \ 203 *a++ = __CONCAT(bus_space_read_,BYTES)(t, h, o); \ 204 o += BYTES; \ 205 } \ 206 } 207 208 __NEWSMIPS_bus_space_read_region(1,8) 209 __NEWSMIPS_bus_space_read_region(2,16) 210 __NEWSMIPS_bus_space_read_region(4,32) 211 212 #if 0 /* Cause a link error for bus_space_read_region_8 */ 213 #define bus_space_read_region_8 !!! bus_space_read_region_8 unimplemented !!! 214 #endif 215 216 #undef __NEWSMIPS_bus_space_read_region 217 218 /* 219 * void bus_space_write_N(bus_space_tag_t tag, 220 * bus_space_handle_t bsh, bus_size_t offset, 221 * uintN_t value); 222 * 223 * Write the 1, 2, 4, or 8 byte value `value' to bus space 224 * described by tag/handle/offset. 225 */ 226 227 #define bus_space_write_1(t, h, o, v) \ 228 do { \ 229 (void) t; \ 230 *(volatile uint8_t *)((h) + (o)) = (v); \ 231 } while (0) 232 233 #define bus_space_write_2(t, h, o, v) \ 234 do { \ 235 (void) t; \ 236 *(volatile uint16_t *)((h) + (o)) = (v); \ 237 } while (0) 238 239 #define bus_space_write_4(t, h, o, v) \ 240 do { \ 241 (void) t; \ 242 *(volatile uint32_t *)((h) + (o)) = (v); \ 243 } while (0) 244 245 #if 0 /* Cause a link error for bus_space_write_8 */ 246 #define bus_space_write_8 !!! bus_space_write_8 not implemented !!! 247 #endif 248 249 /* 250 * void bus_space_write_multi_N(bus_space_tag_t tag, 251 * bus_space_handle_t bsh, bus_size_t offset, 252 * const uintN_t *addr, size_t count); 253 * 254 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer 255 * provided to bus space described by tag/handle/offset. 256 */ 257 258 #define __NEWSMIPS_bus_space_write_multi(BYTES,BITS) \ 259 static __inline void __CONCAT(bus_space_write_multi_,BYTES) \ 260 (bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 261 const __PB_TYPENAME(BITS) *, size_t); \ 262 \ 263 static __inline void \ 264 __CONCAT(bus_space_write_multi_,BYTES)( \ 265 bus_space_tag_t t, \ 266 bus_space_handle_t h, \ 267 bus_size_t o, \ 268 const __PB_TYPENAME(BITS) *a, \ 269 size_t c) \ 270 { \ 271 \ 272 while (c--) \ 273 __CONCAT(bus_space_write_,BYTES)(t, h, o, *a++); \ 274 } 275 276 __NEWSMIPS_bus_space_write_multi(1,8) 277 __NEWSMIPS_bus_space_write_multi(2,16) 278 __NEWSMIPS_bus_space_write_multi(4,32) 279 280 #if 0 /* Cause a link error for bus_space_write_8 */ 281 #define bus_space_write_multi_8(t, h, o, a, c) \ 282 !!! bus_space_write_multi_8 unimplimented !!! 283 #endif 284 285 #undef __NEWSMIPS_bus_space_write_multi 286 287 /* 288 * void bus_space_write_region_N(bus_space_tag_t tag, 289 * bus_space_handle_t bsh, bus_size_t offset, 290 * const uintN_t *addr, size_t count); 291 * 292 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided 293 * to bus space described by tag/handle starting at `offset'. 294 */ 295 296 #define __NEWSMIPS_bus_space_write_region(BYTES,BITS) \ 297 static __inline void __CONCAT(bus_space_write_region_,BYTES) \ 298 (bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 299 const __PB_TYPENAME(BITS) *, size_t); \ 300 \ 301 static __inline void \ 302 __CONCAT(bus_space_write_region_,BYTES)( \ 303 bus_space_tag_t t, \ 304 bus_space_handle_t h, \ 305 bus_size_t o, \ 306 const __PB_TYPENAME(BITS) *a, \ 307 size_t c) \ 308 { \ 309 \ 310 while (c--) { \ 311 __CONCAT(bus_space_write_,BYTES)(t, h, o, *a++); \ 312 o += BYTES; \ 313 } \ 314 } 315 316 __NEWSMIPS_bus_space_write_region(1,8) 317 __NEWSMIPS_bus_space_write_region(2,16) 318 __NEWSMIPS_bus_space_write_region(4,32) 319 320 #if 0 /* Cause a link error for bus_space_write_region_8 */ 321 #define bus_space_write_region_8 \ 322 !!! bus_space_write_region_8 unimplemented !!! 323 #endif 324 325 #undef __NEWSMIPS_bus_space_write_region 326 327 /* 328 * void bus_space_set_multi_N(bus_space_tag_t tag, 329 * bus_space_handle_t bsh, bus_size_t offset, uintN_t val, 330 * size_t count); 331 * 332 * Write the 1, 2, 4, or 8 byte value `val' to bus space described 333 * by tag/handle/offset `count' times. 334 */ 335 336 #define __NEWSMIPS_bus_space_set_multi(BYTES,BITS) \ 337 static __inline void __CONCAT(bus_space_set_multi_,BYTES) \ 338 (bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 339 __PB_TYPENAME(BITS), size_t); \ 340 \ 341 static __inline void \ 342 __CONCAT(bus_space_set_multi_,BYTES)( \ 343 bus_space_tag_t t, \ 344 bus_space_handle_t h, \ 345 bus_size_t o, \ 346 __PB_TYPENAME(BITS) v, \ 347 size_t c) \ 348 { \ 349 \ 350 while (c--) \ 351 __CONCAT(bus_space_write_,BYTES)(t, h, o, v); \ 352 } 353 354 __NEWSMIPS_bus_space_set_multi(1,8) 355 __NEWSMIPS_bus_space_set_multi(2,16) 356 __NEWSMIPS_bus_space_set_multi(4,32) 357 358 #if 0 /* Cause a link error for bus_space_set_multi_8 */ 359 #define bus_space_set_multi_8 \ 360 !!! bus_space_set_multi_8 unimplemented !!! 361 #endif 362 363 #undef __NEWSMIPS_bus_space_set_multi 364 365 /* 366 * void bus_space_set_region_N(bus_space_tag_t tag, 367 * bus_space_handle_t bsh, bus_size_t offset, uintN_t val, 368 * size_t count); 369 * 370 * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described 371 * by tag/handle starting at `offset'. 372 */ 373 374 #define __NEWSMIPS_bus_space_set_region(BYTES,BITS) \ 375 static __inline void __CONCAT(bus_space_set_region_,BYTES) \ 376 (bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 377 __PB_TYPENAME(BITS), size_t); \ 378 \ 379 static __inline void \ 380 __CONCAT(bus_space_set_region_,BYTES)( \ 381 bus_space_tag_t t, \ 382 bus_space_handle_t h, \ 383 bus_size_t o, \ 384 __PB_TYPENAME(BITS) v, \ 385 size_t c) \ 386 { \ 387 \ 388 while (c--) { \ 389 __CONCAT(bus_space_write_,BYTES)(t, h, o, v); \ 390 o += BYTES; \ 391 } \ 392 } 393 394 __NEWSMIPS_bus_space_set_region(1,8) 395 __NEWSMIPS_bus_space_set_region(2,16) 396 __NEWSMIPS_bus_space_set_region(4,32) 397 398 #if 0 /* Cause a link error for bus_space_set_region_8 */ 399 #define bus_space_set_region_8 \ 400 !!! bus_space_set_region_8 unimplemented !!! 401 #endif 402 403 #undef __NEWSMIPS_bus_space_set_region 404 405 /* 406 * void bus_space_copy_region_N(bus_space_tag_t tag, 407 * bus_space_handle_t bsh1, bus_size_t off1, 408 * bus_space_handle_t bsh2, bus_size_t off2, 409 * bus_size_t count); 410 * 411 * Copy `count' 1, 2, 4, or 8 byte values from bus space starting 412 * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2. 413 */ 414 415 #define __NEWSMIPS_copy_region(BYTES) \ 416 static __inline void __CONCAT(bus_space_copy_region_,BYTES) \ 417 (bus_space_tag_t, \ 418 bus_space_handle_t bsh1, bus_size_t off1, \ 419 bus_space_handle_t bsh2, bus_size_t off2, \ 420 bus_size_t count); \ 421 \ 422 static __inline void \ 423 __CONCAT(bus_space_copy_region_,BYTES)( \ 424 bus_space_tag_t t, \ 425 bus_space_handle_t h1, \ 426 bus_size_t o1, \ 427 bus_space_handle_t h2, \ 428 bus_size_t o2, \ 429 bus_size_t c) \ 430 { \ 431 bus_size_t o; \ 432 \ 433 if ((h1 + o1) >= (h2 + o2)) { \ 434 /* src after dest: copy forward */ \ 435 for (o = 0; c != 0; c--, o += BYTES) \ 436 __CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o, \ 437 __CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \ 438 } else { \ 439 /* dest after src: copy backwards */ \ 440 for (o = (c - 1) * BYTES; c != 0; c--, o -= BYTES) \ 441 __CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o, \ 442 __CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \ 443 } \ 444 } 445 446 __NEWSMIPS_copy_region(1) 447 __NEWSMIPS_copy_region(2) 448 __NEWSMIPS_copy_region(4) 449 450 #if 0 /* Cause a link error for bus_space_copy_region_8 */ 451 #define bus_space_copy_region_8 \ 452 !!! bus_space_copy_region_8 unimplemented !!! 453 #endif 454 455 #undef __NEWSMIPS_copy_region 456 457 /* 458 * Bus read/write barrier methods. 459 * 460 * void bus_space_barrier(bus_space_tag_t tag, 461 * bus_space_handle_t bsh, bus_size_t offset, 462 * bus_size_t len, int flags); 463 * 464 * On the MIPS, we just flush the write buffer. 465 */ 466 #define bus_space_barrier(t, h, o, l, f) \ 467 ((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f), \ 468 wbflush())) 469 #define BUS_SPACE_BARRIER_READ 0x01 /* force read barrier */ 470 #define BUS_SPACE_BARRIER_WRITE 0x02 /* force write barrier */ 471 472 #undef __PB_TYPENAME_PREFIX 473 #undef __PB_TYPENAME 474 475 #define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t) 476 477 /* 478 * Flags used in various bus DMA methods. 479 */ 480 #define BUS_DMA_WAITOK 0x000 /* safe to sleep (pseudo-flag) */ 481 #define BUS_DMA_NOWAIT 0x001 /* not safe to sleep */ 482 #define BUS_DMA_ALLOCNOW 0x002 /* perform resource allocation now */ 483 #define BUS_DMA_COHERENT 0x004 /* hint: map memory DMA coherent */ 484 #define BUS_DMA_STREAMING 0x008 /* hint: sequential, unidirectional */ 485 #define BUS_DMA_BUS1 0x010 /* placeholders for bus functions... */ 486 #define BUS_DMA_BUS2 0x020 487 #define BUS_DMA_BUS3 0x040 488 #define BUS_DMA_BUS4 0x080 489 #define BUS_DMA_READ 0x100 /* mapping is device -> memory only */ 490 #define BUS_DMA_WRITE 0x200 /* mapping is memory -> device only */ 491 #define BUS_DMA_NOCACHE 0x400 /* hint: map non-cached memory */ 492 493 #define NEWSMIPS_DMAMAP_COHERENT 0x10000 /* no cache flush necessary on sync */ 494 #define NEWSMIPS_DMAMAP_MAPTBL 0x20000 /* use DMA maping table */ 495 496 /* Forwards needed by prototypes below. */ 497 struct mbuf; 498 struct uio; 499 500 /* 501 * Operations performed by bus_dmamap_sync(). 502 */ 503 #define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */ 504 #define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */ 505 #define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */ 506 #define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */ 507 508 typedef struct newsmips_bus_dma_tag *bus_dma_tag_t; 509 typedef struct newsmips_bus_dmamap *bus_dmamap_t; 510 511 #define BUS_DMA_TAG_VALID(t) ((t) != (bus_dma_tag_t)0) 512 513 /* 514 * bus_dma_segment_t 515 * 516 * Describes a single contiguous DMA transaction. Values 517 * are suitable for programming into DMA registers. 518 */ 519 struct newsmips_bus_dma_segment { 520 bus_addr_t ds_addr; /* DMA address */ 521 bus_size_t ds_len; /* length of transfer */ 522 bus_addr_t _ds_vaddr; /* virtual address, 0 if invalid */ 523 }; 524 typedef struct newsmips_bus_dma_segment bus_dma_segment_t; 525 526 /* 527 * bus_dma_tag_t 528 * 529 * A machine-dependent opaque type describing the implementation of 530 * DMA for a given bus. 531 */ 532 533 struct newsmips_bus_dma_tag { 534 /* 535 * DMA mapping methods. 536 */ 537 int (*_dmamap_create)(bus_dma_tag_t, bus_size_t, int, 538 bus_size_t, bus_size_t, int, bus_dmamap_t *); 539 void (*_dmamap_destroy)(bus_dma_tag_t, bus_dmamap_t); 540 int (*_dmamap_load)(bus_dma_tag_t, bus_dmamap_t, void *, 541 bus_size_t, struct proc *, int); 542 int (*_dmamap_load_mbuf)(bus_dma_tag_t, bus_dmamap_t, 543 struct mbuf *, int); 544 int (*_dmamap_load_uio)(bus_dma_tag_t, bus_dmamap_t, 545 struct uio *, int); 546 int (*_dmamap_load_raw)(bus_dma_tag_t, bus_dmamap_t, 547 bus_dma_segment_t *, int, bus_size_t, int); 548 void (*_dmamap_unload)(bus_dma_tag_t, bus_dmamap_t); 549 void (*_dmamap_sync)(bus_dma_tag_t, bus_dmamap_t, 550 bus_addr_t, bus_size_t, int); 551 552 /* 553 * DMA memory utility functions. 554 */ 555 int (*_dmamem_alloc)(bus_dma_tag_t, bus_size_t, bus_size_t, 556 bus_size_t, bus_dma_segment_t *, int, int *, int); 557 void (*_dmamem_free)(bus_dma_tag_t, 558 bus_dma_segment_t *, int); 559 int (*_dmamem_map)(bus_dma_tag_t, bus_dma_segment_t *, 560 int, size_t, void **, int); 561 void (*_dmamem_unmap)(bus_dma_tag_t, void *, size_t); 562 paddr_t (*_dmamem_mmap)(bus_dma_tag_t, bus_dma_segment_t *, 563 int, off_t, int, int); 564 565 /* 566 * NEWSMIPS quirks. 567 * This is NOT a constant. Slot dependent information is 568 * required to flush DMA cache correctly. 569 */ 570 int _slotno; 571 bus_space_tag_t _slotbaset; 572 bus_space_handle_t _slotbaseh; 573 }; 574 575 #define bus_dmamap_create(t, s, n, m, b, f, p) \ 576 (*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p)) 577 #define bus_dmamap_destroy(t, p) \ 578 (*(t)->_dmamap_destroy)((t), (p)) 579 #define bus_dmamap_load(t, m, b, s, p, f) \ 580 (*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f)) 581 #define bus_dmamap_load_mbuf(t, m, b, f) \ 582 (*(t)->_dmamap_load_mbuf)((t), (m), (b), (f)) 583 #define bus_dmamap_load_uio(t, m, u, f) \ 584 (*(t)->_dmamap_load_uio)((t), (m), (u), (f)) 585 #define bus_dmamap_load_raw(t, m, sg, n, s, f) \ 586 (*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f)) 587 #define bus_dmamap_unload(t, p) \ 588 (*(t)->_dmamap_unload)((t), (p)) 589 #define bus_dmamap_sync(t, p, o, l, ops) \ 590 (*(t)->_dmamap_sync)((t), (p), (o), (l), (ops)) 591 592 #define bus_dmamem_alloc(t, s, a, b, sg, n, r, f) \ 593 (*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f)) 594 #define bus_dmamem_free(t, sg, n) \ 595 (*(t)->_dmamem_free)((t), (sg), (n)) 596 #define bus_dmamem_map(t, sg, n, s, k, f) \ 597 (*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f)) 598 #define bus_dmamem_unmap(t, k, s) \ 599 (*(t)->_dmamem_unmap)((t), (k), (s)) 600 #define bus_dmamem_mmap(t, sg, n, o, p, f) \ 601 (*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f)) 602 603 #define bus_dmatag_subregion(t, mna, mxa, nt, f) EOPNOTSUPP 604 #define bus_dmatag_destroy(t) 605 606 /* 607 * bus_dmamap_t 608 * 609 * Describes a DMA mapping. 610 */ 611 struct newsmips_bus_dmamap { 612 /* 613 * PRIVATE MEMBERS: not for use my machine-independent code. 614 */ 615 bus_size_t _dm_size; /* largest DMA transfer mappable */ 616 int _dm_segcnt; /* number of segs this map can map */ 617 bus_size_t _dm_maxmaxsegsz; /* fixed largest possible segment */ 618 bus_size_t _dm_boundary; /* don't cross this */ 619 int _dm_flags; /* misc. flags */ 620 int _dm_maptbl; /* DMA mapping table index */ 621 int _dm_maptblcnt; /* number of DMA mapping table */ 622 struct vmspace *_dm_vmspace; /* vmspace that owns the mapping */ 623 624 /* 625 * PUBLIC MEMBERS: these are used by machine-independent code. 626 */ 627 bus_size_t dm_maxsegsz; /* largest possible segment */ 628 bus_size_t dm_mapsize; /* size of the mapping */ 629 int dm_nsegs; /* # valid segments in mapping */ 630 bus_dma_segment_t dm_segs[1]; /* segments; variable length */ 631 }; 632 633 #ifdef _NEWSMIPS_BUS_DMA_PRIVATE 634 void newsmips_bus_dma_init(void); 635 636 int _bus_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t, 637 bus_size_t, int, bus_dmamap_t *); 638 void _bus_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t); 639 int _bus_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, 640 bus_size_t, struct proc *, int); 641 int _bus_dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t, 642 struct mbuf *, int); 643 int _bus_dmamap_load_uio(bus_dma_tag_t, bus_dmamap_t, 644 struct uio *, int); 645 int _bus_dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t, 646 bus_dma_segment_t *, int, bus_size_t, int); 647 void _bus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t); 648 void _bus_dmamap_sync_r3k(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 649 bus_size_t, int); 650 void _bus_dmamap_sync_r4k(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 651 bus_size_t, int); 652 653 int _bus_dmamem_alloc(bus_dma_tag_t tag, bus_size_t size, 654 bus_size_t alignment, bus_size_t boundary, 655 bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags); 656 void _bus_dmamem_free(bus_dma_tag_t tag, bus_dma_segment_t *segs, 657 int nsegs); 658 int _bus_dmamem_map(bus_dma_tag_t tag, bus_dma_segment_t *segs, 659 int nsegs, size_t size, void **kvap, int flags); 660 void _bus_dmamem_unmap(bus_dma_tag_t tag, void *kva, 661 size_t size); 662 paddr_t _bus_dmamem_mmap(bus_dma_tag_t tag, bus_dma_segment_t *segs, 663 int nsegs, off_t off, int prot, int flags); 664 665 int _bus_dmamem_alloc_range(bus_dma_tag_t tag, bus_size_t size, 666 bus_size_t alignment, bus_size_t boundary, 667 bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags, 668 vaddr_t low, vaddr_t high); 669 670 extern struct newsmips_bus_dma_tag newsmips_default_bus_dma_tag; 671 #endif /* _NEWSMIPS_BUS_DMA_PRIVATE */ 672 673 #endif /* _NEWSMIPS_BUS_H_ */ 674
Indexes created Wed Oct 01 15:09:59 GMT 2025