225 lines
6.1 KiB
C
225 lines
6.1 KiB
C
/*
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* Copyright (c) 2003
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* Hidetoshi Shimokawa. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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*
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* This product includes software developed by Hidetoshi Shimokawa.
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*
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* 4. Neither the name of the author nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/types.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#if __FreeBSD_version >= 501102
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#endif
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <dev/firewire/firewire.h>
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#include <dev/firewire/firewirereg.h>
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#include <dev/firewire/fwdma.h>
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static void
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fwdma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
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{
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bus_addr_t *baddr;
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if (error)
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printf("fwdma_map_cb: error=%d\n", error);
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baddr = (bus_addr_t *)arg;
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*baddr = segs->ds_addr;
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}
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void *
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fwdma_malloc(struct firewire_comm *fc, int alignment, bus_size_t size,
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struct fwdma_alloc *dma, int flag)
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{
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int err;
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dma->v_addr = NULL;
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err = bus_dma_tag_create(
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/*parent*/ fc->dmat,
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/*alignment*/ alignment,
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/*boundary*/ 0,
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/*lowaddr*/ BUS_SPACE_MAXADDR_32BIT,
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/*highaddr*/ BUS_SPACE_MAXADDR,
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/*filter*/NULL, /*filterarg*/NULL,
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/*maxsize*/ size,
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/*nsegments*/ 1,
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/*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
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/*flags*/ BUS_DMA_ALLOCNOW,
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#if __FreeBSD_version >= 501102
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/*lockfunc*/busdma_lock_mutex,
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/*lockarg*/&Giant,
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#endif
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&dma->dma_tag);
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if (err) {
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printf("fwdma_malloc: failed(1)\n");
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return(NULL);
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}
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err = bus_dmamem_alloc(dma->dma_tag, &dma->v_addr,
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flag, &dma->dma_map);
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if (err) {
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printf("fwdma_malloc: failed(2)\n");
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/* XXX destory tag */
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return(NULL);
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}
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bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->v_addr,
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size, fwdma_map_cb, &dma->bus_addr, /*flags*/0);
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return(dma->v_addr);
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}
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void
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fwdma_free(struct firewire_comm *fc, struct fwdma_alloc *dma)
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{
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bus_dmamap_unload(dma->dma_tag, dma->dma_map);
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bus_dmamem_free(dma->dma_tag, dma->v_addr, dma->dma_map);
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bus_dma_tag_destroy(dma->dma_tag);
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}
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void *
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fwdma_malloc_size(bus_dma_tag_t dmat, bus_dmamap_t *dmamap,
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bus_size_t size, bus_addr_t *bus_addr, int flag)
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{
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void *v_addr;
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if (bus_dmamem_alloc(dmat, &v_addr, flag, dmamap)) {
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printf("fwdma_malloc_size: failed(1)\n");
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return(NULL);
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}
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bus_dmamap_load(dmat, *dmamap, v_addr, size,
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fwdma_map_cb, bus_addr, /*flags*/0);
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return(v_addr);
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}
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void
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fwdma_free_size(bus_dma_tag_t dmat, bus_dmamap_t dmamap,
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void *vaddr, bus_size_t size)
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{
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bus_dmamap_unload(dmat, dmamap);
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bus_dmamem_free(dmat, vaddr, dmamap);
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}
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/*
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* Allocate multisegment dma buffers
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* each segment size is eqaul to ssize except last segment.
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*/
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struct fwdma_alloc_multi *
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fwdma_malloc_multiseg(struct firewire_comm *fc, int alignment,
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int esize, int n, int flag)
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{
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struct fwdma_alloc_multi *am;
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struct fwdma_seg *seg;
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bus_size_t ssize;
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int nseg;
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if (esize > PAGE_SIZE) {
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/* round up to PAGE_SIZE */
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esize = ssize = roundup2(esize, PAGE_SIZE);
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nseg = n;
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} else {
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/* allocate PAGE_SIZE segment for small elements */
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ssize = rounddown(PAGE_SIZE, esize);
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nseg = howmany(n, ssize / esize);
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}
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am = (struct fwdma_alloc_multi *)malloc(sizeof(struct fwdma_alloc_multi)
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+ sizeof(struct fwdma_seg)*nseg, M_FW, M_WAITOK);
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if (am == NULL) {
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printf("fwdma_malloc_multiseg: malloc failed\n");
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return(NULL);
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}
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am->ssize = ssize;
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am->esize = esize;
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am->nseg = 0;
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if (bus_dma_tag_create(
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/*parent*/ fc->dmat,
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/*alignment*/ alignment,
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/*boundary*/ 0,
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/*lowaddr*/ BUS_SPACE_MAXADDR_32BIT,
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/*highaddr*/ BUS_SPACE_MAXADDR,
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/*filter*/NULL, /*filterarg*/NULL,
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/*maxsize*/ ssize,
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/*nsegments*/ 1,
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/*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
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/*flags*/ BUS_DMA_ALLOCNOW,
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#if __FreeBSD_version >= 501102
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/*lockfunc*/busdma_lock_mutex,
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/*lockarg*/&Giant,
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#endif
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&am->dma_tag)) {
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printf("fwdma_malloc_multiseg: tag_create failed\n");
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free(am, M_FW);
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return(NULL);
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}
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#if 0
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#if __FreeBSD_version < 500000
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printf("malloc_multi: ssize=%d nseg=%d\n", ssize, nseg);
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#else
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printf("malloc_multi: ssize=%td nseg=%d\n", ssize, nseg);
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#endif
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#endif
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for (seg = &am->seg[0]; nseg --; seg ++) {
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seg->v_addr = fwdma_malloc_size(am->dma_tag, &seg->dma_map,
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ssize, &seg->bus_addr, flag);
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if (seg->v_addr == NULL) {
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printf("fwdma_malloc_multi: malloc_size failed %d\n",
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am->nseg);
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fwdma_free_multiseg(am);
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return(NULL);
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}
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am->nseg++;
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}
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return(am);
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}
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void
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fwdma_free_multiseg(struct fwdma_alloc_multi *am)
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{
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struct fwdma_seg *seg;
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for (seg = &am->seg[0]; am->nseg --; seg ++) {
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fwdma_free_size(am->dma_tag, seg->dma_map,
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seg->v_addr, am->ssize);
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}
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bus_dma_tag_destroy(am->dma_tag);
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free(am, M_FW);
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}
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