dev/proto/proto_busdma.c

67 	struct proto_tag *tag;
70 	if (ioc->u.tag.bndry != 0 &&
71 	    (ioc->u.tag.bndry & (ioc->u.tag.bndry - 1)) != 0)
79 	if (ioc->u.tag.maxsegsz > ioc->u.tag.maxsz || ioc->u.tag.nsegs == 1)
80 		ioc->u.tag.maxsegsz = ioc->u.tag.maxsz;
82 	tag = malloc(sizeof(*tag), M_PROTO_BUSDMA, M_WAITOK | M_ZERO);
84 		tag->parent = parent;
85 		LIST_INSERT_HEAD(&parent->children, tag, peers);
86 		tag->align = MAX(ioc->u.tag.align, parent->align);
87 		tag->bndry = BNDRY_MIN(ioc->u.tag.bndry, parent->bndry);
88 		tag->maxaddr = MIN(ioc->u.tag.maxaddr, parent->maxaddr);
89 		tag->maxsz = MIN(ioc->u.tag.maxsz, parent->maxsz);
90 		tag->maxsegsz = MIN(ioc->u.tag.maxsegsz, parent->maxsegsz);
91 		tag->nsegs = MIN(ioc->u.tag.nsegs, parent->nsegs);
92 		tag->datarate = MIN(ioc->u.tag.datarate, parent->datarate);
94 		ioc->u.tag.align = tag->align;
95 		ioc->u.tag.bndry = tag->bndry;
96 		ioc->u.tag.maxaddr = tag->maxaddr;
97 		ioc->u.tag.maxsz = tag->maxsz;
98 		ioc->u.tag.maxsegsz = tag->maxsegsz;
99 		ioc->u.tag.nsegs = tag->nsegs;
100 		ioc->u.tag.datarate = tag->datarate;
102 		tag->align = ioc->u.tag.align;
103 		tag->bndry = ioc->u.tag.bndry;
104 		tag->maxaddr = ioc->u.tag.maxaddr;
105 		tag->maxsz = ioc->u.tag.maxsz;
106 		tag->maxsegsz = ioc->u.tag.maxsegsz;
107 		tag->nsegs = ioc->u.tag.nsegs;
108 		tag->datarate = ioc->u.tag.datarate;
110 	LIST_INSERT_HEAD(&busdma->tags, tag, tags);
111 	ioc->result = (uintptr_t)(void *)tag;
116 proto_busdma_tag_destroy(struct proto_busdma *busdma, struct proto_tag *tag)
119 	if (!LIST_EMPTY(&tag->mds))
121 	if (!LIST_EMPTY(&tag->children))
124 	if (tag->parent != NULL) {
125 		LIST_REMOVE(tag, peers);
126 		tag->parent = NULL;
128 	LIST_REMOVE(tag, tags);
129 	free(tag, M_PROTO_BUSDMA);
136 	struct proto_tag *tag;
138 	LIST_FOREACH(tag, &busdma->tags, tags) {
139 		if ((void *)tag == (void *)key)
140 			return (tag);
174 proto_busdma_mem_alloc(struct proto_busdma *busdma, struct proto_tag *tag,
182 	md->tag = tag;
184 	error = bus_dma_tag_create(busdma->bd_roottag, tag->align, tag->bndry,
185 	    tag->maxaddr, BUS_SPACE_MAXADDR, NULL, NULL, tag->maxsz,
186 	    tag->nsegs, tag->maxsegsz, 0, NULL, NULL, &md->bd_tag);
202 	    tag->maxsz, proto_busdma_mem_alloc_callback, &pcb, BUS_DMA_NOWAIT);
209 	LIST_INSERT_HEAD(&tag->mds, md, peers);
212 	ioc->u.md.virt_size = tag->maxsz;
229 proto_busdma_md_create(struct proto_busdma *busdma, struct proto_tag *tag,
236 	md->tag = tag;
238 	error = bus_dma_tag_create(busdma->bd_roottag, tag->align, tag->bndry,
239 	    tag->maxaddr, BUS_SPACE_MAXADDR, NULL, NULL, tag->maxsz,
240 	    tag->nsegs, tag->maxsegsz, 0, NULL, NULL, &md->bd_tag);
252 	LIST_INSERT_HEAD(&tag->mds, md, peers);
374 	struct proto_tag *tag, *tag1;
378 	LIST_FOREACH_SAFE(tag, &busdma->tags, tags, tag1)
379 		proto_busdma_tag_destroy(busdma, tag);
387 	struct proto_tag *tag;
398 		tag = proto_busdma_tag_lookup(busdma, ioc->key);
399 		if (tag == NULL) {
403 		error = proto_busdma_tag_create(busdma, tag, ioc);
406 		tag = proto_busdma_tag_lookup(busdma, ioc->key);
407 		if (tag == NULL) {
411 		error = proto_busdma_tag_destroy(busdma, tag);
414 		tag = proto_busdma_tag_lookup(busdma, ioc->u.md.tag);
415 		if (tag == NULL) {
419 		error = proto_busdma_mem_alloc(busdma, tag, ioc);
430 		tag = proto_busdma_tag_lookup(busdma, ioc->u.md.tag);
431 		if (tag == NULL) {
435 		error = proto_busdma_md_create(busdma, tag, ioc);
483 		    physaddr <= trunc_page(md->physaddr + md->tag->maxsz))