FreeBSD-5.3/sys/dev/firewire/fwdma.c
/*
* Copyright (c) 2003
* Hidetoshi Shimokawa. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
*
* This product includes software developed by Hidetoshi Shimokawa.
*
* 4. Neither the name of the author nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#ifdef __FreeBSD__
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/dev/firewire/fwdma.c,v 1.6 2004/03/26 23:17:10 simokawa Exp $");
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#if defined(__FreeBSD__) && __FreeBSD_version >= 501102
#include <sys/lock.h>
#include <sys/mutex.h>
#endif
#include <sys/bus.h>
#include <machine/bus.h>
#ifdef __DragonFly__
#include <bus/firewire/firewire.h>
#include <bus/firewire/firewirereg.h>
#include <bus/firewire/fwdma.h>
#else
#include <dev/firewire/firewire.h>
#include <dev/firewire/firewirereg.h>
#include <dev/firewire/fwdma.h>
#endif
static void
fwdma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
bus_addr_t *baddr;
if (error)
printf("fwdma_map_cb: error=%d\n", error);
baddr = (bus_addr_t *)arg;
*baddr = segs->ds_addr;
}
void *
fwdma_malloc(struct firewire_comm *fc, int alignment, bus_size_t size,
struct fwdma_alloc *dma, int flag)
{
int err;
dma->v_addr = NULL;
err = bus_dma_tag_create(
/*parent*/ fc->dmat,
/*alignment*/ alignment,
/*boundary*/ 0,
/*lowaddr*/ BUS_SPACE_MAXADDR_32BIT,
/*highaddr*/ BUS_SPACE_MAXADDR,
/*filter*/NULL, /*filterarg*/NULL,
/*maxsize*/ size,
/*nsegments*/ 1,
/*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
/*flags*/ BUS_DMA_ALLOCNOW,
#if defined(__FreeBSD__) && __FreeBSD_version >= 501102
/*lockfunc*/busdma_lock_mutex,
/*lockarg*/&Giant,
#endif
&dma->dma_tag);
if (err) {
printf("fwdma_malloc: failed(1)\n");
return(NULL);
}
err = bus_dmamem_alloc(dma->dma_tag, &dma->v_addr,
flag, &dma->dma_map);
if (err) {
printf("fwdma_malloc: failed(2)\n");
/* XXX destory tag */
return(NULL);
}
bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->v_addr,
size, fwdma_map_cb, &dma->bus_addr, /*flags*/0);
return(dma->v_addr);
}
void
fwdma_free(struct firewire_comm *fc, struct fwdma_alloc *dma)
{
bus_dmamap_unload(dma->dma_tag, dma->dma_map);
bus_dmamem_free(dma->dma_tag, dma->v_addr, dma->dma_map);
bus_dma_tag_destroy(dma->dma_tag);
}
void *
fwdma_malloc_size(bus_dma_tag_t dmat, bus_dmamap_t *dmamap,
bus_size_t size, bus_addr_t *bus_addr, int flag)
{
void *v_addr;
if (bus_dmamem_alloc(dmat, &v_addr, flag, dmamap)) {
printf("fwdma_malloc_size: failed(1)\n");
return(NULL);
}
bus_dmamap_load(dmat, *dmamap, v_addr, size,
fwdma_map_cb, bus_addr, /*flags*/0);
return(v_addr);
}
void
fwdma_free_size(bus_dma_tag_t dmat, bus_dmamap_t dmamap,
void *vaddr, bus_size_t size)
{
bus_dmamap_unload(dmat, dmamap);
bus_dmamem_free(dmat, vaddr, dmamap);
}
/*
* Allocate multisegment dma buffers
* each segment size is eqaul to ssize except last segment.
*/
struct fwdma_alloc_multi *
fwdma_malloc_multiseg(struct firewire_comm *fc, int alignment,
int esize, int n, int flag)
{
struct fwdma_alloc_multi *am;
struct fwdma_seg *seg;
bus_size_t ssize;
int nseg;
if (esize > PAGE_SIZE) {
/* round up to PAGE_SIZE */
esize = ssize = roundup2(esize, PAGE_SIZE);
nseg = n;
} else {
/* allocate PAGE_SIZE segment for small elements */
ssize = rounddown(PAGE_SIZE, esize);
nseg = howmany(n, ssize / esize);
}
am = (struct fwdma_alloc_multi *)malloc(sizeof(struct fwdma_alloc_multi)
+ sizeof(struct fwdma_seg)*nseg, M_FW, M_WAITOK);
if (am == NULL) {
printf("fwdma_malloc_multiseg: malloc failed\n");
return(NULL);
}
am->ssize = ssize;
am->esize = esize;
am->nseg = 0;
if (bus_dma_tag_create(
/*parent*/ fc->dmat,
/*alignment*/ alignment,
/*boundary*/ 0,
/*lowaddr*/ BUS_SPACE_MAXADDR_32BIT,
/*highaddr*/ BUS_SPACE_MAXADDR,
/*filter*/NULL, /*filterarg*/NULL,
/*maxsize*/ ssize,
/*nsegments*/ 1,
/*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
/*flags*/ BUS_DMA_ALLOCNOW,
#if defined(__FreeBSD__) && __FreeBSD_version >= 501102
/*lockfunc*/busdma_lock_mutex,
/*lockarg*/&Giant,
#endif
&am->dma_tag)) {
printf("fwdma_malloc_multiseg: tag_create failed\n");
free(am, M_FW);
return(NULL);
}
#if 0
#if defined(__DragonFly__) || __FreeBSD_version < 500000
printf("malloc_multi: ssize=%d nseg=%d\n", ssize, nseg);
#else
printf("malloc_multi: ssize=%td nseg=%d\n", ssize, nseg);
#endif
#endif
for (seg = &am->seg[0]; nseg --; seg ++) {
seg->v_addr = fwdma_malloc_size(am->dma_tag, &seg->dma_map,
ssize, &seg->bus_addr, flag);
if (seg->v_addr == NULL) {
printf("fwdma_malloc_multi: malloc_size failed %d\n",
am->nseg);
fwdma_free_multiseg(am);
return(NULL);
}
am->nseg++;
}
return(am);
}
void
fwdma_free_multiseg(struct fwdma_alloc_multi *am)
{
struct fwdma_seg *seg;
for (seg = &am->seg[0]; am->nseg --; seg ++) {
fwdma_free_size(am->dma_tag, seg->dma_map,
seg->v_addr, am->ssize);
}
bus_dma_tag_destroy(am->dma_tag);
free(am, M_FW);
}