23 	struct comedi_buf_map *bm =  in comedi_buf_map_kref_release()  local
28 	if (bm->page_list) {  in comedi_buf_map_kref_release()
29 		if (bm->dma_dir != DMA_NONE) {  in comedi_buf_map_kref_release()
30 			for (i = 0; i < bm->n_pages; i++) {  in comedi_buf_map_kref_release()
31 				buf = &bm->page_list[i];  in comedi_buf_map_kref_release()
32 				dma_free_coherent(bm->dma_hw_dev, PAGE_SIZE,  in comedi_buf_map_kref_release()
37 			for (i = 0; i < bm->n_pages; i++) {  in comedi_buf_map_kref_release()
38 				buf = &bm->page_list[i];  in comedi_buf_map_kref_release()
43 		vfree(bm->page_list);  in comedi_buf_map_kref_release()
45 	if (bm->dma_dir != DMA_NONE)  in comedi_buf_map_kref_release()
46 		put_device(bm->dma_hw_dev);  in comedi_buf_map_kref_release()
47 	kfree(bm);  in comedi_buf_map_kref_release()
54 	struct comedi_buf_map *bm;  in __comedi_buf_free()  local
59 	bm = async->buf_map;  in __comedi_buf_free()
62 	comedi_buf_map_put(bm);  in __comedi_buf_free()
69 	struct comedi_buf_map *bm;  in comedi_buf_map_alloc()  local
73 	bm = kzalloc(sizeof(*bm), GFP_KERNEL);  in comedi_buf_map_alloc()
74 	if (!bm)  in comedi_buf_map_alloc()
77 	kref_init(&bm->refcount);  in comedi_buf_map_alloc()
78 	bm->dma_dir = dma_dir;  in comedi_buf_map_alloc()
79 	if (bm->dma_dir != DMA_NONE) {  in comedi_buf_map_alloc()
81 		bm->dma_hw_dev = get_device(dev->hw_dev);  in comedi_buf_map_alloc()
84 	bm->page_list = vzalloc(sizeof(*buf) * n_pages);  in comedi_buf_map_alloc()
85 	if (!bm->page_list)  in comedi_buf_map_alloc()
88 	if (bm->dma_dir != DMA_NONE) {  in comedi_buf_map_alloc()
90 			buf = &bm->page_list[i];  in comedi_buf_map_alloc()
92 			    dma_alloc_coherent(bm->dma_hw_dev, PAGE_SIZE,  in comedi_buf_map_alloc()
99 			buf = &bm->page_list[i];  in comedi_buf_map_alloc()
107 	bm->n_pages = i;  in comedi_buf_map_alloc()
111 	return bm;  in comedi_buf_map_alloc()
114 	comedi_buf_map_put(bm);  in comedi_buf_map_alloc()
123 	struct comedi_buf_map *bm;  in __comedi_buf_alloc()  local
132 	bm = comedi_buf_map_alloc(dev, s->async_dma_dir, n_pages);  in __comedi_buf_alloc()
133 	if (!bm)  in __comedi_buf_alloc()
137 	async->buf_map = bm;  in __comedi_buf_alloc()
142 void comedi_buf_map_get(struct comedi_buf_map *bm)  in comedi_buf_map_get()  argument
144 	if (bm)  in comedi_buf_map_get()
145 		kref_get(&bm->refcount);  in comedi_buf_map_get()
148 int comedi_buf_map_put(struct comedi_buf_map *bm)  in comedi_buf_map_put()  argument
150 	if (bm)  in comedi_buf_map_put()
151 		return kref_put(&bm->refcount, comedi_buf_map_kref_release);  in comedi_buf_map_put()
156 int comedi_buf_map_access(struct comedi_buf_map *bm, unsigned long offset,  in comedi_buf_map_access()  argument
163 	while (done < len && pg < bm->n_pages) {  in comedi_buf_map_access()
165 		void *b = bm->page_list[pg].virt_addr + pgoff;  in comedi_buf_map_access()
184 	struct comedi_buf_map *bm = NULL;  in comedi_buf_map_from_subdev_get()  local
191 	bm = async->buf_map;  in comedi_buf_map_from_subdev_get()
193 	if (bm && bm->n_pages)  in comedi_buf_map_from_subdev_get()
194 		comedi_buf_map_get(bm);  in comedi_buf_map_from_subdev_get()
196 		bm = NULL;  in comedi_buf_map_from_subdev_get()
199 	return bm;  in comedi_buf_map_from_subdev_get()
204 	struct comedi_buf_map *bm = s->async->buf_map;  in comedi_buf_is_mmapped()  local
206 	return bm && (kref_read(&bm->refcount) > 1);  in comedi_buf_is_mmapped()