| busdma_bounce.c (113492) | busdma_bounce.c (115316) |
|---|---|
| 1/* 2 * Copyright (c) 1997, 1998 Justin T. Gibbs. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * | 1/* 2 * Copyright (c) 1997, 1998 Justin T. Gibbs. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * |
| 26 * $FreeBSD: head/sys/i386/i386/busdma_machdep.c 113492 2003-04-15 03:11:03Z mux $ | 26 * $FreeBSD: head/sys/i386/i386/busdma_machdep.c 115316 2003-05-26 04:00:52Z scottl $ |
| 27 */ 28 29#include <sys/param.h> 30#include <sys/systm.h> 31#include <sys/malloc.h> 32#include <sys/bus.h> 33#include <sys/interrupt.h> 34#include <sys/kernel.h> --- 298 unchanged lines hidden (view full) --- 333 334 335/* 336 * Allocate a piece of memory that can be efficiently mapped into 337 * bus device space based on the constraints lited in the dma tag. 338 * A dmamap to for use with dmamap_load is also allocated. 339 */ 340int | 27 */ 28 29#include <sys/param.h> 30#include <sys/systm.h> 31#include <sys/malloc.h> 32#include <sys/bus.h> 33#include <sys/interrupt.h> 34#include <sys/kernel.h> --- 298 unchanged lines hidden (view full) --- 333 334 335/* 336 * Allocate a piece of memory that can be efficiently mapped into 337 * bus device space based on the constraints lited in the dma tag. 338 * A dmamap to for use with dmamap_load is also allocated. 339 */ 340int |
| 341bus_dmamem_alloc_size(bus_dma_tag_t dmat, void** vaddr, int flags, 342 bus_dmamap_t *mapp, bus_size_t size) | 341bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags, 342 bus_dmamap_t *mapp) |
| 343{ | 343{ |
| 344 345 if (size > dmat->maxsize) 346 return (ENOMEM); 347 | |
| 348 /* If we succeed, no mapping/bouncing will be required */ 349 *mapp = NULL; 350 | 344 /* If we succeed, no mapping/bouncing will be required */ 345 *mapp = NULL; 346 |
| 351 if ((size <= PAGE_SIZE) && | 347 if ((dmat->maxsize <= PAGE_SIZE) && |
| 352 dmat->lowaddr >= ptoa((vm_paddr_t)Maxmem)) { | 348 dmat->lowaddr >= ptoa((vm_paddr_t)Maxmem)) { |
| 353 *vaddr = malloc(size, M_DEVBUF, | 349 *vaddr = malloc(dmat->maxsize, M_DEVBUF, |
| 354 (flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK); 355 } else { 356 /* 357 * XXX Use Contigmalloc until it is merged into this facility 358 * and handles multi-seg allocations. Nobody is doing 359 * multi-seg allocations yet though. 360 */ 361 mtx_lock(&Giant); | 350 (flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK); 351 } else { 352 /* 353 * XXX Use Contigmalloc until it is merged into this facility 354 * and handles multi-seg allocations. Nobody is doing 355 * multi-seg allocations yet though. 356 */ 357 mtx_lock(&Giant); |
| 362 *vaddr = contigmalloc(size, M_DEVBUF, | 358 *vaddr = contigmalloc(dmat->maxsize, M_DEVBUF, |
| 363 (flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK, 364 0ul, dmat->lowaddr, dmat->alignment? dmat->alignment : 1ul, 365 dmat->boundary); 366 mtx_unlock(&Giant); 367 } 368 if (*vaddr == NULL) 369 return (ENOMEM); 370 return (0); 371} 372 | 359 (flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK, 360 0ul, dmat->lowaddr, dmat->alignment? dmat->alignment : 1ul, 361 dmat->boundary); 362 mtx_unlock(&Giant); 363 } 364 if (*vaddr == NULL) 365 return (ENOMEM); 366 return (0); 367} 368 |
| 373int 374bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags, 375 bus_dmamap_t *mapp) 376{ 377 return (bus_dmamem_alloc_size(dmat, vaddr, flags, mapp, dmat->maxsize)); 378} 379 | |
| 380/* 381 * Free a piece of memory and it's allociated dmamap, that was allocated 382 * via bus_dmamem_alloc. Make the same choice for free/contigfree. 383 */ 384void | 369/* 370 * Free a piece of memory and it's allociated dmamap, that was allocated 371 * via bus_dmamem_alloc. Make the same choice for free/contigfree. 372 */ 373void |
| 385bus_dmamem_free_size(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map, 386 bus_size_t size) | 374bus_dmamem_free(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map) |
| 387{ 388 /* 389 * dmamem does not need to be bounced, so the map should be 390 * NULL 391 */ 392 if (map != NULL) 393 panic("bus_dmamem_free: Invalid map freed\n"); | 375{ 376 /* 377 * dmamem does not need to be bounced, so the map should be 378 * NULL 379 */ 380 if (map != NULL) 381 panic("bus_dmamem_free: Invalid map freed\n"); |
| 394 if ((size <= PAGE_SIZE) && dmat->lowaddr >= ptoa((vm_paddr_t)Maxmem)) | 382 if ((dmat->maxsize <= PAGE_SIZE) 383 && dmat->lowaddr >= ptoa((vm_paddr_t)Maxmem)) |
| 395 free(vaddr, M_DEVBUF); 396 else { 397 mtx_lock(&Giant); | 384 free(vaddr, M_DEVBUF); 385 else { 386 mtx_lock(&Giant); |
| 398 contigfree(vaddr, size, M_DEVBUF); | 387 contigfree(vaddr, dmat->maxsize, M_DEVBUF); |
| 399 mtx_unlock(&Giant); 400 } 401} 402 | 388 mtx_unlock(&Giant); 389 } 390} 391 |
| 403void 404bus_dmamem_free(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map) 405{ 406 bus_dmamem_free_size(dmat, vaddr, map, dmat->maxsize); 407} 408 | |
| 409/* 410 * Utility function to load a linear buffer. lastaddrp holds state 411 * between invocations (for multiple-buffer loads). segp contains 412 * the starting segment on entrace, and the ending segment on exit. 413 * first indicates if this is the first invocation of this function. 414 */ 415static int 416_bus_dmamap_load_buffer(bus_dma_tag_t dmat, --- 476 unchanged lines hidden --- | 392/* 393 * Utility function to load a linear buffer. lastaddrp holds state 394 * between invocations (for multiple-buffer loads). segp contains 395 * the starting segment on entrace, and the ending segment on exit. 396 * first indicates if this is the first invocation of this function. 397 */ 398static int 399_bus_dmamap_load_buffer(bus_dma_tag_t dmat, --- 476 unchanged lines hidden --- |