Differential D25937 Diff 78039 head/sys/x86/x86/busdma_bounce.c

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head/sys/x86/x86/busdma_bounce.c

Show First 20 Lines • Show All 265 Lines • ▼ Show 20 Lines	if (dmat->map_count != 0) {
error = EBUSY;		error = EBUSY;
goto out;		goto out;
}		}
while (dmat != NULL) {		while (dmat != NULL) {
parent = (bus_dma_tag_t)dmat->common.parent;		parent = (bus_dma_tag_t)dmat->common.parent;
atomic_subtract_int(&dmat->common.ref_count, 1);		atomic_subtract_int(&dmat->common.ref_count, 1);
if (dmat->common.ref_count == 0) {		if (dmat->common.ref_count == 0) {
if (dmat->segments != NULL)		if (dmat->segments != NULL)
free_domain(dmat->segments, M_DEVBUF);		free(dmat->segments, M_DEVBUF);
free(dmat, M_DEVBUF);		free(dmat, M_DEVBUF);
/*		/*
* Last reference count, so		* Last reference count, so
* release our reference		* release our reference
* count on our parent.		* count on our parent.
*/		*/
dmat = parent;		dmat = parent;
} else		} else
▲ Show 20 Lines • Show All 99 Lines • ▼ Show 20 Lines	bounce_bus_dmamap_destroy(bus_dma_tag_t dmat, bus_dmamap_t map)
if (map != NULL && map != &nobounce_dmamap) {		if (map != NULL && map != &nobounce_dmamap) {
if (STAILQ_FIRST(&map->bpages) != NULL) {		if (STAILQ_FIRST(&map->bpages) != NULL) {
CTR3(KTR_BUSDMA, "%s: tag %p error %d",		CTR3(KTR_BUSDMA, "%s: tag %p error %d",
__func__, dmat, EBUSY);		__func__, dmat, EBUSY);
return (EBUSY);		return (EBUSY);
}		}
if (dmat->bounce_zone)		if (dmat->bounce_zone)
dmat->bounce_zone->map_count--;		dmat->bounce_zone->map_count--;
free_domain(map, M_DEVBUF);		free(map, M_DEVBUF);
}		}
dmat->map_count--;		dmat->map_count--;
CTR2(KTR_BUSDMA, "%s: tag %p error 0", __func__, dmat);		CTR2(KTR_BUSDMA, "%s: tag %p error 0", __func__, dmat);
return (0);		return (0);
}		}


/*		/*
▲ Show 20 Lines • Show All 100 Lines • ▼ Show 20 Lines	bounce_bus_dmamem_free(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map)
/*		/*
* dmamem does not need to be bounced, so the map should be		* dmamem does not need to be bounced, so the map should be
* NULL and the BUS_DMA_KMEM_ALLOC flag cleared if malloc()		* NULL and the BUS_DMA_KMEM_ALLOC flag cleared if malloc()
* was used and set if kmem_alloc_contig() was used.		* was used and set if kmem_alloc_contig() was used.
*/		*/
if (map != NULL)		if (map != NULL)
panic("bus_dmamem_free: Invalid map freed\n");		panic("bus_dmamem_free: Invalid map freed\n");
if ((dmat->bounce_flags & BUS_DMA_KMEM_ALLOC) == 0)		if ((dmat->bounce_flags & BUS_DMA_KMEM_ALLOC) == 0)
free_domain(vaddr, M_DEVBUF);		free(vaddr, M_DEVBUF);
else		else
kmem_free((vm_offset_t)vaddr, dmat->common.maxsize);		kmem_free((vm_offset_t)vaddr, dmat->common.maxsize);
CTR3(KTR_BUSDMA, "%s: tag %p flags 0x%x", __func__, dmat,		CTR3(KTR_BUSDMA, "%s: tag %p flags 0x%x", __func__, dmat,
dmat->bounce_flags);		dmat->bounce_flags);
}		}

static bool		static bool
_bus_dmamap_pagesneeded(bus_dma_tag_t dmat, vm_paddr_t buf, bus_size_t buflen,		_bus_dmamap_pagesneeded(bus_dma_tag_t dmat, vm_paddr_t buf, bus_size_t buflen,
▲ Show 20 Lines • Show All 667 Lines • ▼ Show 20 Lines	bpage = malloc_domainset(sizeof(*bpage), M_DEVBUF,
DOMAINSET_PREF(dmat->common.domain), M_NOWAIT \| M_ZERO);		DOMAINSET_PREF(dmat->common.domain), M_NOWAIT \| M_ZERO);

if (bpage == NULL)		if (bpage == NULL)
break;		break;
bpage->vaddr = (vm_offset_t)contigmalloc_domainset(PAGE_SIZE,		bpage->vaddr = (vm_offset_t)contigmalloc_domainset(PAGE_SIZE,
M_DEVBUF, DOMAINSET_PREF(dmat->common.domain), M_NOWAIT,		M_DEVBUF, DOMAINSET_PREF(dmat->common.domain), M_NOWAIT,
0ul, bz->lowaddr, PAGE_SIZE, 0);		0ul, bz->lowaddr, PAGE_SIZE, 0);
if (bpage->vaddr == 0) {		if (bpage->vaddr == 0) {
free_domain(bpage, M_DEVBUF);		free(bpage, M_DEVBUF);
break;		break;
}		}
bpage->busaddr = pmap_kextract(bpage->vaddr);		bpage->busaddr = pmap_kextract(bpage->vaddr);
mtx_lock(&bounce_lock);		mtx_lock(&bounce_lock);
STAILQ_INSERT_TAIL(&bz->bounce_page_list, bpage, links);		STAILQ_INSERT_TAIL(&bz->bounce_page_list, bpage, links);
total_bpages++;		total_bpages++;
bz->total_bpages++;		bz->total_bpages++;
bz->free_bpages++;		bz->free_bpages++;
▲ Show 20 Lines • Show All 147 Lines • Show Last 20 Lines