76 static int do_blktrans_request(struct mtd_blktrans_ops *tr,  in do_blktrans_request()  argument
83 	block = blk_rq_pos(req) << 9 >> tr->blkshift;  in do_blktrans_request()
84 	nsect = blk_rq_cur_bytes(req) >> tr->blkshift;  in do_blktrans_request()
91 		return tr->flush(dev);  in do_blktrans_request()
98 		return tr->discard(dev, block, nsect);  in do_blktrans_request()
101 		for (; nsect > 0; nsect--, block++, buf += tr->blksize)  in do_blktrans_request()
102 			if (tr->readsect(dev, block, buf))  in do_blktrans_request()
107 		if (!tr->writesect)  in do_blktrans_request()
111 		for (; nsect > 0; nsect--, block++, buf += tr->blksize)  in do_blktrans_request()
112 			if (tr->writesect(dev, block, buf))  in do_blktrans_request()
128 	struct mtd_blktrans_ops *tr = dev->tr;  in mtd_blktrans_work()  local
140 			if (tr->background && !background_done) {  in mtd_blktrans_work()
143 				tr->background(dev);  in mtd_blktrans_work()
159 		res = do_blktrans_request(dev->tr, dev, req);  in mtd_blktrans_work()
202 	__module_get(dev->tr->owner);  in blktrans_open()
207 	if (dev->tr->open) {  in blktrans_open()
208 		ret = dev->tr->open(dev);  in blktrans_open()
226 	if (dev->tr->release)  in blktrans_open()
227 		dev->tr->release(dev);  in blktrans_open()
229 	module_put(dev->tr->owner);  in blktrans_open()
251 	module_put(dev->tr->owner);  in blktrans_release()
254 		if (dev->tr->release)  in blktrans_release()
255 			dev->tr->release(dev);  in blktrans_release()
277 	ret = dev->tr->getgeo ? dev->tr->getgeo(dev, geo) : -ENOTTY;  in blktrans_getgeo()
300 		ret = dev->tr->flush ? dev->tr->flush(dev) : 0;  in blktrans_ioctl()
321 	struct mtd_blktrans_ops *tr = new->tr;  in add_mtd_blktrans_dev()  local
333 	list_for_each_entry(d, &tr->devs, list) {  in add_mtd_blktrans_dev()
361 	if (new->devnum > (MINORMASK >> tr->part_bits) ||  in add_mtd_blktrans_dev()
362 	    (tr->part_bits && new->devnum >= 27 * 26)) {  in add_mtd_blktrans_dev()
367 	list_add_tail(&new->list, &tr->devs);  in add_mtd_blktrans_dev()
373 	if (!tr->writesect)  in add_mtd_blktrans_dev()
378 	gd = alloc_disk(1 << tr->part_bits);  in add_mtd_blktrans_dev()
385 	gd->major = tr->major;  in add_mtd_blktrans_dev()
386 	gd->first_minor = (new->devnum) << tr->part_bits;  in add_mtd_blktrans_dev()
389 	if (tr->part_bits)  in add_mtd_blktrans_dev()
392 				 "%s%c", tr->name, 'a' + new->devnum);  in add_mtd_blktrans_dev()
395 				 "%s%c%c", tr->name,  in add_mtd_blktrans_dev()
400 			 "%s%d", tr->name, new->devnum);  in add_mtd_blktrans_dev()
402 	set_capacity(gd, ((u64)new->size * tr->blksize) >> 9);  in add_mtd_blktrans_dev()
411 	if (tr->flush)  in add_mtd_blktrans_dev()
415 	blk_queue_logical_block_size(new->rq, tr->blksize);  in add_mtd_blktrans_dev()
420 	if (tr->discard) {  in add_mtd_blktrans_dev()
429 				  tr->name, new->mtd->index);  in add_mtd_blktrans_dev()
484 		if (old->tr->release)  in del_mtd_blktrans_dev()
485 			old->tr->release(old);  in del_mtd_blktrans_dev()
498 	struct mtd_blktrans_ops *tr;  in blktrans_notify_remove()  local
501 	list_for_each_entry(tr, &blktrans_majors, list)  in blktrans_notify_remove()
502 		list_for_each_entry_safe(dev, next, &tr->devs, list)  in blktrans_notify_remove()
504 				tr->remove_dev(dev);  in blktrans_notify_remove()
509 	struct mtd_blktrans_ops *tr;  in blktrans_notify_add()  local
514 	list_for_each_entry(tr, &blktrans_majors, list)  in blktrans_notify_add()
515 		tr->add_mtd(tr, mtd);  in blktrans_notify_add()
523 int register_mtd_blktrans(struct mtd_blktrans_ops *tr)  in register_mtd_blktrans()  argument
537 	ret = register_blkdev(tr->major, tr->name);  in register_mtd_blktrans()
540 		       tr->name, tr->major, ret);  in register_mtd_blktrans()
546 		tr->major = ret;  in register_mtd_blktrans()
548 	tr->blkshift = ffs(tr->blksize) - 1;  in register_mtd_blktrans()
550 	INIT_LIST_HEAD(&tr->devs);  in register_mtd_blktrans()
551 	list_add(&tr->list, &blktrans_majors);  in register_mtd_blktrans()
555 			tr->add_mtd(tr, mtd);  in register_mtd_blktrans()
561 int deregister_mtd_blktrans(struct mtd_blktrans_ops *tr)  in deregister_mtd_blktrans()  argument
568 	list_del(&tr->list);  in deregister_mtd_blktrans()
570 	list_for_each_entry_safe(dev, next, &tr->devs, list)  in deregister_mtd_blktrans()
571 		tr->remove_dev(dev);  in deregister_mtd_blktrans()
573 	unregister_blkdev(tr->major, tr->name);  in deregister_mtd_blktrans()
576 	BUG_ON(!list_empty(&tr->devs));  in deregister_mtd_blktrans()