dev/proto/proto_busdma.c

65 	struct proto_tag *tag;
68 	if (ioc->u.tag.bndry != 0 &&
69 	    (ioc->u.tag.bndry & (ioc->u.tag.bndry - 1)) != 0)
77 	if (ioc->u.tag.maxsegsz > ioc->u.tag.maxsz || ioc->u.tag.nsegs == 1)
78 		ioc->u.tag.maxsegsz = ioc->u.tag.maxsz;
80 	tag = malloc(sizeof(*tag), M_PROTO_BUSDMA, M_WAITOK | M_ZERO);
82 		tag->parent = parent;
83 		LIST_INSERT_HEAD(&parent->children, tag, peers);
84 		tag->align = MAX(ioc->u.tag.align, parent->align);
85 		tag->bndry = BNDRY_MIN(ioc->u.tag.bndry, parent->bndry);
86 		tag->maxaddr = MIN(ioc->u.tag.maxaddr, parent->maxaddr);
87 		tag->maxsz = MIN(ioc->u.tag.maxsz, parent->maxsz);
88 		tag->maxsegsz = MIN(ioc->u.tag.maxsegsz, parent->maxsegsz);
89 		tag->nsegs = MIN(ioc->u.tag.nsegs, parent->nsegs);
90 		tag->datarate = MIN(ioc->u.tag.datarate, parent->datarate);
92 		ioc->u.tag.align = tag->align;
93 		ioc->u.tag.bndry = tag->bndry;
94 		ioc->u.tag.maxaddr = tag->maxaddr;
95 		ioc->u.tag.maxsz = tag->maxsz;
96 		ioc->u.tag.maxsegsz = tag->maxsegsz;
97 		ioc->u.tag.nsegs = tag->nsegs;
98 		ioc->u.tag.datarate = tag->datarate;
100 		tag->align = ioc->u.tag.align;
101 		tag->bndry = ioc->u.tag.bndry;
102 		tag->maxaddr = ioc->u.tag.maxaddr;
103 		tag->maxsz = ioc->u.tag.maxsz;
104 		tag->maxsegsz = ioc->u.tag.maxsegsz;
105 		tag->nsegs = ioc->u.tag.nsegs;
106 		tag->datarate = ioc->u.tag.datarate;
108 	LIST_INSERT_HEAD(&busdma->tags, tag, tags);
109 	ioc->result = (uintptr_t)(void *)tag;
114 proto_busdma_tag_destroy(struct proto_busdma *busdma, struct proto_tag *tag)
117 	if (!LIST_EMPTY(&tag->mds))
119 	if (!LIST_EMPTY(&tag->children))
122 	if (tag->parent != NULL) {
123 		LIST_REMOVE(tag, peers);
124 		tag->parent = NULL;
126 	LIST_REMOVE(tag, tags);
127 	free(tag, M_PROTO_BUSDMA);
134 	struct proto_tag *tag;
136 	LIST_FOREACH(tag, &busdma->tags, tags) {
137 		if ((void *)tag == (void *)key)
138 			return (tag);
172 proto_busdma_mem_alloc(struct proto_busdma *busdma, struct proto_tag *tag,
180 	md->tag = tag;
182 	error = bus_dma_tag_create(busdma->bd_roottag, tag->align, tag->bndry,
183 	    tag->maxaddr, BUS_SPACE_MAXADDR, NULL, NULL, tag->maxsz,
184 	    tag->nsegs, tag->maxsegsz, 0, NULL, NULL, &md->bd_tag);
200 	    tag->maxsz, proto_busdma_mem_alloc_callback, &pcb, BUS_DMA_NOWAIT);
207 	LIST_INSERT_HEAD(&tag->mds, md, peers);
210 	ioc->u.md.virt_size = tag->maxsz;
227 proto_busdma_md_create(struct proto_busdma *busdma, struct proto_tag *tag,
234 	md->tag = tag;
236 	error = bus_dma_tag_create(busdma->bd_roottag, tag->align, tag->bndry,
237 	    tag->maxaddr, BUS_SPACE_MAXADDR, NULL, NULL, tag->maxsz,
238 	    tag->nsegs, tag->maxsegsz, 0, NULL, NULL, &md->bd_tag);
250 	LIST_INSERT_HEAD(&tag->mds, md, peers);
374 	struct proto_tag *tag, *tag1;
379 	LIST_FOREACH_SAFE(tag, &busdma->tags, tags, tag1)
380 		proto_busdma_tag_destroy(busdma, tag);
389 	struct proto_tag *tag;
402 		tag = proto_busdma_tag_lookup(busdma, ioc->key);
403 		if (tag == NULL) {
407 		error = proto_busdma_tag_create(busdma, tag, ioc);
410 		tag = proto_busdma_tag_lookup(busdma, ioc->key);
411 		if (tag == NULL) {
415 		error = proto_busdma_tag_destroy(busdma, tag);
418 		tag = proto_busdma_tag_lookup(busdma, ioc->u.md.tag);
419 		if (tag == NULL) {
423 		error = proto_busdma_mem_alloc(busdma, tag, ioc);
434 		tag = proto_busdma_tag_lookup(busdma, ioc->u.md.tag);
435 		if (tag == NULL) {
439 		error = proto_busdma_md_create(busdma, tag, ioc);
494 		    physaddr <= trunc_page(md->physaddr + md->tag->maxsz)) {