Differential D25937 Diff 78039 head/sys/dev/iommu/busdma_iommu.c

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head/sys/dev/iommu/busdma_iommu.c

Show First 20 Lines • Show All 404 Lines • ▼ Show 20 Lines	if (dmat->map_count != 0) {
goto out;		goto out;
}		}
while (dmat != NULL) {		while (dmat != NULL) {
parent = (struct bus_dma_tag_iommu *)dmat->common.parent;		parent = (struct bus_dma_tag_iommu *)dmat->common.parent;
if (atomic_fetchadd_int(&dmat->common.ref_count, -1) ==		if (atomic_fetchadd_int(&dmat->common.ref_count, -1) ==
1) {		1) {
if (dmat == dmat->ctx->tag)		if (dmat == dmat->ctx->tag)
iommu_free_ctx(dmat->ctx);		iommu_free_ctx(dmat->ctx);
free_domain(dmat->segments, M_IOMMU_DMAMAP);		free(dmat->segments, M_IOMMU_DMAMAP);
free(dmat, M_DEVBUF);		free(dmat, M_DEVBUF);
dmat = parent;		dmat = parent;
} else		} else
dmat = NULL;		dmat = NULL;
}		}
}		}
out:		out:
CTR3(KTR_BUSDMA, "%s tag %p error %d", __func__, dmat_copy, error);		CTR3(KTR_BUSDMA, "%s tag %p error %d", __func__, dmat_copy, error);
Show All 20 Lines	if (map == NULL) {
*mapp = NULL;		*mapp = NULL;
return (ENOMEM);		return (ENOMEM);
}		}
if (tag->segments == NULL) {		if (tag->segments == NULL) {
tag->segments = malloc_domainset(sizeof(bus_dma_segment_t) *		tag->segments = malloc_domainset(sizeof(bus_dma_segment_t) *
tag->common.nsegments, M_IOMMU_DMAMAP,		tag->common.nsegments, M_IOMMU_DMAMAP,
DOMAINSET_PREF(tag->common.domain), M_NOWAIT);		DOMAINSET_PREF(tag->common.domain), M_NOWAIT);
if (tag->segments == NULL) {		if (tag->segments == NULL) {
free_domain(map, M_IOMMU_DMAMAP);		free(map, M_IOMMU_DMAMAP);
*mapp = NULL;		*mapp = NULL;
return (ENOMEM);		return (ENOMEM);
}		}
}		}
TAILQ_INIT(&map->map_entries);		TAILQ_INIT(&map->map_entries);
map->tag = tag;		map->tag = tag;
map->locked = true;		map->locked = true;
map->cansleep = false;		map->cansleep = false;
Show All 15 Lines	iommu_bus_dmamap_destroy(bus_dma_tag_t dmat, bus_dmamap_t map1)
if (map != NULL) {		if (map != NULL) {
domain = tag->ctx->domain;		domain = tag->ctx->domain;
IOMMU_DOMAIN_LOCK(domain);		IOMMU_DOMAIN_LOCK(domain);
if (!TAILQ_EMPTY(&map->map_entries)) {		if (!TAILQ_EMPTY(&map->map_entries)) {
IOMMU_DOMAIN_UNLOCK(domain);		IOMMU_DOMAIN_UNLOCK(domain);
return (EBUSY);		return (EBUSY);
}		}
IOMMU_DOMAIN_UNLOCK(domain);		IOMMU_DOMAIN_UNLOCK(domain);
free_domain(map, M_IOMMU_DMAMAP);		free(map, M_IOMMU_DMAMAP);
}		}
tag->map_count--;		tag->map_count--;
return (0);		return (0);
}		}


static int		static int
iommu_bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags,		iommu_bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags,
▲ Show 20 Lines • Show All 41 Lines • ▼ Show 20 Lines
{		{
struct bus_dma_tag_iommu *tag;		struct bus_dma_tag_iommu *tag;
struct bus_dmamap_iommu *map;		struct bus_dmamap_iommu *map;

tag = (struct bus_dma_tag_iommu *)dmat;		tag = (struct bus_dma_tag_iommu *)dmat;
map = (struct bus_dmamap_iommu *)map1;		map = (struct bus_dmamap_iommu *)map1;

if ((map->flags & BUS_DMAMAP_IOMMU_MALLOC) != 0) {		if ((map->flags & BUS_DMAMAP_IOMMU_MALLOC) != 0) {
free_domain(vaddr, M_DEVBUF);		free(vaddr, M_DEVBUF);
map->flags &= ~BUS_DMAMAP_IOMMU_MALLOC;		map->flags &= ~BUS_DMAMAP_IOMMU_MALLOC;
} else {		} else {
KASSERT((map->flags & BUS_DMAMAP_IOMMU_KMEM_ALLOC) != 0,		KASSERT((map->flags & BUS_DMAMAP_IOMMU_KMEM_ALLOC) != 0,
("iommu_bus_dmamem_free for non alloced map %p", map));		("iommu_bus_dmamem_free for non alloced map %p", map));
kmem_free((vm_offset_t)vaddr, tag->common.maxsize);		kmem_free((vm_offset_t)vaddr, tag->common.maxsize);
map->flags &= ~BUS_DMAMAP_IOMMU_KMEM_ALLOC;		map->flags &= ~BUS_DMAMAP_IOMMU_KMEM_ALLOC;
}		}

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