fwdma.c revision 117228
1113584Ssimokawa/* 2113584Ssimokawa * Copyright (c) 2003 3113584Ssimokawa * Hidetoshi Shimokawa. All rights reserved. 4113584Ssimokawa * 5113584Ssimokawa * Redistribution and use in source and binary forms, with or without 6113584Ssimokawa * modification, are permitted provided that the following conditions 7113584Ssimokawa * are met: 8113584Ssimokawa * 1. Redistributions of source code must retain the above copyright 9113584Ssimokawa * notice, this list of conditions and the following disclaimer. 10113584Ssimokawa * 2. Redistributions in binary form must reproduce the above copyright 11113584Ssimokawa * notice, this list of conditions and the following disclaimer in the 12113584Ssimokawa * documentation and/or other materials provided with the distribution. 13113584Ssimokawa * 3. All advertising materials mentioning features or use of this software 14113584Ssimokawa * must display the following acknowledgement: 15113584Ssimokawa * 16113584Ssimokawa * This product includes software developed by Hidetoshi Shimokawa. 17113584Ssimokawa * 18113584Ssimokawa * 4. Neither the name of the author nor the names of its contributors 19113584Ssimokawa * may be used to endorse or promote products derived from this software 20113584Ssimokawa * without specific prior written permission. 21113584Ssimokawa * 22113584Ssimokawa * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23113584Ssimokawa * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24113584Ssimokawa * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25113584Ssimokawa * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26113584Ssimokawa * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27113584Ssimokawa * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28113584Ssimokawa * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29113584Ssimokawa * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30113584Ssimokawa * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31113584Ssimokawa * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32113584Ssimokawa * SUCH DAMAGE. 33113584Ssimokawa * 34113584Ssimokawa * $FreeBSD: head/sys/dev/firewire/fwdma.c 117228 2003-07-04 14:04:41Z simokawa $ 35113584Ssimokawa */ 36113584Ssimokawa#include <sys/param.h> 37113584Ssimokawa#include <sys/systm.h> 38113584Ssimokawa#include <sys/types.h> 39113584Ssimokawa#include <sys/kernel.h> 40113584Ssimokawa#include <sys/malloc.h> 41117126Sscottl#include <sys/lock.h> 42117126Sscottl#include <sys/mutex.h> 43113584Ssimokawa 44113584Ssimokawa#include <sys/bus.h> 45113584Ssimokawa#include <machine/bus.h> 46113584Ssimokawa 47113584Ssimokawa#include <dev/firewire/firewire.h> 48113584Ssimokawa#include <dev/firewire/firewirereg.h> 49113584Ssimokawa#include <dev/firewire/fwdma.h> 50113584Ssimokawa 51113584Ssimokawastatic void 52113584Ssimokawafwdma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 53113584Ssimokawa{ 54113584Ssimokawa bus_addr_t *baddr; 55113584Ssimokawa 56113584Ssimokawa if (error) 57113584Ssimokawa printf("fwdma_map_cb: error=%d\n", error); 58113584Ssimokawa baddr = (bus_addr_t *)arg; 59113584Ssimokawa *baddr = segs->ds_addr; 60113584Ssimokawa} 61113584Ssimokawa 62113584Ssimokawavoid * 63113584Ssimokawafwdma_malloc(struct firewire_comm *fc, int alignment, bus_size_t size, 64113584Ssimokawa struct fwdma_alloc *dma, int flag) 65113584Ssimokawa{ 66113584Ssimokawa int err; 67113584Ssimokawa 68113584Ssimokawa dma->v_addr = NULL; 69113584Ssimokawa err = bus_dma_tag_create( 70113584Ssimokawa /*parent*/ fc->dmat, 71113584Ssimokawa /*alignment*/ alignment, 72113584Ssimokawa /*boundary*/ 0, 73113584Ssimokawa /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT, 74113584Ssimokawa /*highaddr*/ BUS_SPACE_MAXADDR, 75113584Ssimokawa /*filter*/NULL, /*filterarg*/NULL, 76113584Ssimokawa /*maxsize*/ size, 77113584Ssimokawa /*nsegments*/ 1, 78113584Ssimokawa /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT, 79117126Sscottl /*flags*/ BUS_DMA_ALLOCNOW, 80117228Ssimokawa#if __FreeBSD_version >= 501102 81117228Ssimokawa /*lockfunc*/busdma_lock_mutex, 82117228Ssimokawa /*lockarg*/&Giant, 83117228Ssimokawa#endif 84117228Ssimokawa &dma->dma_tag); 85113584Ssimokawa if (err) { 86113584Ssimokawa printf("fwdma_malloc: failed(1)\n"); 87113584Ssimokawa return(NULL); 88113584Ssimokawa } 89113584Ssimokawa 90113584Ssimokawa err = bus_dmamem_alloc(dma->dma_tag, &dma->v_addr, 91113584Ssimokawa flag, &dma->dma_map); 92113584Ssimokawa if (err) { 93113584Ssimokawa printf("fwdma_malloc: failed(2)\n"); 94113584Ssimokawa /* XXX destory tag */ 95113584Ssimokawa return(NULL); 96113584Ssimokawa } 97113584Ssimokawa 98113584Ssimokawa bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->v_addr, 99113584Ssimokawa size, fwdma_map_cb, &dma->bus_addr, /*flags*/0); 100113584Ssimokawa 101113584Ssimokawa return(dma->v_addr); 102113584Ssimokawa} 103113584Ssimokawa 104113584Ssimokawavoid 105113584Ssimokawafwdma_free(struct firewire_comm *fc, struct fwdma_alloc *dma) 106113584Ssimokawa{ 107113584Ssimokawa bus_dmamap_unload(dma->dma_tag, dma->dma_map); 108113584Ssimokawa bus_dmamem_free(dma->dma_tag, dma->v_addr, dma->dma_map); 109113584Ssimokawa bus_dma_tag_destroy(dma->dma_tag); 110113584Ssimokawa} 111113584Ssimokawa 112113584Ssimokawa 113113584Ssimokawavoid * 114113584Ssimokawafwdma_malloc_size(bus_dma_tag_t dmat, bus_dmamap_t *dmamap, 115113584Ssimokawa bus_size_t size, bus_addr_t *bus_addr, int flag) 116113584Ssimokawa{ 117113584Ssimokawa void *v_addr; 118113584Ssimokawa 119113584Ssimokawa if (bus_dmamem_alloc(dmat, &v_addr, flag, dmamap)) { 120113584Ssimokawa printf("fwdma_malloc_size: failed(1)\n"); 121113584Ssimokawa return(NULL); 122113584Ssimokawa } 123113584Ssimokawa bus_dmamap_load(dmat, *dmamap, v_addr, size, 124113584Ssimokawa fwdma_map_cb, bus_addr, /*flags*/0); 125113584Ssimokawa return(v_addr); 126113584Ssimokawa} 127113584Ssimokawa 128113584Ssimokawavoid 129113584Ssimokawafwdma_free_size(bus_dma_tag_t dmat, bus_dmamap_t dmamap, 130113584Ssimokawa void *vaddr, bus_size_t size) 131113584Ssimokawa{ 132113584Ssimokawa bus_dmamap_unload(dmat, dmamap); 133113584Ssimokawa bus_dmamem_free(dmat, vaddr, dmamap); 134113584Ssimokawa} 135113584Ssimokawa 136113584Ssimokawa/* 137113584Ssimokawa * Allocate multisegment dma buffers 138113584Ssimokawa * each segment size is eqaul to ssize except last segment. 139113584Ssimokawa */ 140113584Ssimokawastruct fwdma_alloc_multi * 141113584Ssimokawafwdma_malloc_multiseg(struct firewire_comm *fc, int alignment, 142113584Ssimokawa int esize, int n, int flag) 143113584Ssimokawa{ 144113584Ssimokawa struct fwdma_alloc_multi *am; 145113584Ssimokawa struct fwdma_seg *seg; 146113584Ssimokawa bus_size_t ssize; 147113584Ssimokawa int nseg; 148113584Ssimokawa 149113584Ssimokawa if (esize > PAGE_SIZE) { 150113584Ssimokawa /* round up to PAGE_SIZE */ 151113584Ssimokawa esize = ssize = roundup2(esize, PAGE_SIZE); 152113584Ssimokawa nseg = n; 153113584Ssimokawa } else { 154113584Ssimokawa /* allocate PAGE_SIZE segment for small elements */ 155113584Ssimokawa ssize = rounddown(PAGE_SIZE, esize); 156113584Ssimokawa nseg = howmany(n, ssize / esize); 157113584Ssimokawa } 158113584Ssimokawa am = (struct fwdma_alloc_multi *)malloc(sizeof(struct fwdma_alloc_multi) 159113584Ssimokawa + sizeof(struct fwdma_seg)*nseg, M_FW, M_WAITOK); 160113584Ssimokawa if (am == NULL) { 161113584Ssimokawa printf("fwdma_malloc_multiseg: malloc failed\n"); 162113584Ssimokawa return(NULL); 163113584Ssimokawa } 164113584Ssimokawa am->ssize = ssize; 165113584Ssimokawa am->esize = esize; 166113584Ssimokawa am->nseg = 0; 167113584Ssimokawa if (bus_dma_tag_create( 168113584Ssimokawa /*parent*/ fc->dmat, 169113584Ssimokawa /*alignment*/ alignment, 170113584Ssimokawa /*boundary*/ 0, 171113584Ssimokawa /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT, 172113584Ssimokawa /*highaddr*/ BUS_SPACE_MAXADDR, 173113584Ssimokawa /*filter*/NULL, /*filterarg*/NULL, 174113584Ssimokawa /*maxsize*/ ssize, 175113584Ssimokawa /*nsegments*/ 1, 176113584Ssimokawa /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT, 177117126Sscottl /*flags*/ BUS_DMA_ALLOCNOW, 178117228Ssimokawa#if __FreeBSD_version >= 501102 179117126Sscottl /*lockfunc*/busdma_lock_mutex, 180117228Ssimokawa /*lockarg*/&Giant, 181117228Ssimokawa#endif 182117228Ssimokawa &am->dma_tag)) { 183113584Ssimokawa printf("fwdma_malloc_multiseg: tag_create failed\n"); 184113584Ssimokawa free(am, M_FW); 185113584Ssimokawa return(NULL); 186113584Ssimokawa } 187113584Ssimokawa 188113584Ssimokawa#if 0 189113584Ssimokawa#if __FreeBSD_version < 500000 190113584Ssimokawa printf("malloc_multi: ssize=%d nseg=%d\n", ssize, nseg); 191113584Ssimokawa#else 192113584Ssimokawa printf("malloc_multi: ssize=%td nseg=%d\n", ssize, nseg); 193113584Ssimokawa#endif 194113584Ssimokawa#endif 195113584Ssimokawa for (seg = &am->seg[0]; nseg --; seg ++) { 196113584Ssimokawa seg->v_addr = fwdma_malloc_size(am->dma_tag, &seg->dma_map, 197113584Ssimokawa ssize, &seg->bus_addr, flag); 198113584Ssimokawa if (seg->v_addr == NULL) { 199113584Ssimokawa printf("fwdma_malloc_multi: malloc_size failed %d\n", 200113584Ssimokawa am->nseg); 201113584Ssimokawa fwdma_free_multiseg(am); 202113584Ssimokawa return(NULL); 203113584Ssimokawa } 204113584Ssimokawa am->nseg++; 205113584Ssimokawa } 206113584Ssimokawa return(am); 207113584Ssimokawa} 208113584Ssimokawa 209113584Ssimokawavoid 210113584Ssimokawafwdma_free_multiseg(struct fwdma_alloc_multi *am) 211113584Ssimokawa{ 212113584Ssimokawa struct fwdma_seg *seg; 213113584Ssimokawa 214113584Ssimokawa for (seg = &am->seg[0]; am->nseg --; seg ++) { 215113584Ssimokawa fwdma_free_size(am->dma_tag, seg->dma_map, 216113584Ssimokawa seg->v_addr, am->ssize); 217113584Ssimokawa } 218113584Ssimokawa bus_dma_tag_destroy(am->dma_tag); 219113584Ssimokawa free(am, M_FW); 220113584Ssimokawa} 221