28  * blk_set_default_limits - reset limits to default values
64  * blk_set_stacking_limits - set default limits for stacking devices
69  *   by stacking drivers like DM that have no internal limits.
75 	/* Inherit limits from component devices */  in blk_set_stacking_limits()
99 	q->limits.bounce = bounce;  in blk_queue_bounce_limit()
124 	struct queue_limits *limits = &q->limits;  in blk_queue_max_hw_sectors()  local
134 				    limits->logical_block_size >> SECTOR_SHIFT);  in blk_queue_max_hw_sectors()
135 	limits->max_hw_sectors = max_hw_sectors;  in blk_queue_max_hw_sectors()
137 	max_sectors = min_not_zero(max_hw_sectors, limits->max_dev_sectors);  in blk_queue_max_hw_sectors()
140 				 limits->logical_block_size >> SECTOR_SHIFT);  in blk_queue_max_hw_sectors()
141 	limits->max_sectors = max_sectors;  in blk_queue_max_hw_sectors()
163 	q->limits.chunk_sectors = chunk_sectors;  in blk_queue_chunk_sectors()
175 	q->limits.max_hw_discard_sectors = max_discard_sectors;  in blk_queue_max_discard_sectors()
176 	q->limits.max_discard_sectors = max_discard_sectors;  in blk_queue_max_discard_sectors()
188 	q->limits.max_secure_erase_sectors = max_sectors;  in blk_queue_max_secure_erase_sectors()
201 	q->limits.max_write_zeroes_sectors = max_write_zeroes_sectors;  in blk_queue_max_write_zeroes_sectors()
218 	max_sectors = min(q->limits.max_hw_sectors, max_zone_append_sectors);  in blk_queue_max_zone_append_sectors()
219 	max_sectors = min(q->limits.chunk_sectors, max_sectors);  in blk_queue_max_zone_append_sectors()
228 	q->limits.max_zone_append_sectors = max_sectors;  in blk_queue_max_zone_append_sectors()
249 	q->limits.max_segments = max_segments;  in blk_queue_max_segments()
265 	q->limits.max_discard_segments = max_segments;  in blk_queue_max_discard_segments()
287 	WARN_ON_ONCE(q->limits.virt_boundary_mask);  in blk_queue_max_segment_size()
289 	q->limits.max_segment_size = max_size;  in blk_queue_max_segment_size()
305 	struct queue_limits *limits = &q->limits;  in blk_queue_logical_block_size()  local
307 	limits->logical_block_size = size;  in blk_queue_logical_block_size()
309 	if (limits->physical_block_size < size)  in blk_queue_logical_block_size()
310 		limits->physical_block_size = size;  in blk_queue_logical_block_size()
312 	if (limits->io_min < limits->physical_block_size)  in blk_queue_logical_block_size()
313 		limits->io_min = limits->physical_block_size;  in blk_queue_logical_block_size()
315 	limits->max_hw_sectors =  in blk_queue_logical_block_size()
316 		round_down(limits->max_hw_sectors, size >> SECTOR_SHIFT);  in blk_queue_logical_block_size()
317 	limits->max_sectors =  in blk_queue_logical_block_size()
318 		round_down(limits->max_sectors, size >> SECTOR_SHIFT);  in blk_queue_logical_block_size()
334 	q->limits.physical_block_size = size;  in blk_queue_physical_block_size()
336 	if (q->limits.physical_block_size < q->limits.logical_block_size)  in blk_queue_physical_block_size()
337 		q->limits.physical_block_size = q->limits.logical_block_size;  in blk_queue_physical_block_size()
339 	if (q->limits.io_min < q->limits.physical_block_size)  in blk_queue_physical_block_size()
340 		q->limits.io_min = q->limits.physical_block_size;  in blk_queue_physical_block_size()
359 	q->limits.zone_write_granularity = size;  in blk_queue_zone_write_granularity()
361 	if (q->limits.zone_write_granularity < q->limits.logical_block_size)  in blk_queue_zone_write_granularity()
362 		q->limits.zone_write_granularity = q->limits.logical_block_size;  in blk_queue_zone_write_granularity()
379 	q->limits.alignment_offset =  in blk_queue_alignment_offset()
380 		offset & (q->limits.physical_block_size - 1);  in blk_queue_alignment_offset()
381 	q->limits.misaligned = 0;  in blk_queue_alignment_offset()
401  * @limits: the queue limits
410 void blk_limits_io_min(struct queue_limits *limits, unsigned int min)  in blk_limits_io_min()  argument
412 	limits->io_min = min;  in blk_limits_io_min()
414 	if (limits->io_min < limits->logical_block_size)  in blk_limits_io_min()
415 		limits->io_min = limits->logical_block_size;  in blk_limits_io_min()
417 	if (limits->io_min < limits->physical_block_size)  in blk_limits_io_min()
418 		limits->io_min = limits->physical_block_size;  in blk_limits_io_min()
438 	blk_limits_io_min(&q->limits, min);  in blk_queue_io_min()
444  * @limits: the queue limits
455 void blk_limits_io_opt(struct queue_limits *limits, unsigned int opt)  in blk_limits_io_opt()  argument
457 	limits->io_opt = opt;  in blk_limits_io_opt()
476 	blk_limits_io_opt(&q->limits, opt);  in blk_queue_io_opt()
528  * @t:	the stacking driver limits (top device)
529  * @b:  the underlying queue limits (bottom, component device)
688  * disk_stack_limits - adjust queue limits for stacked drivers
694  *    Merges the limits for a top level gendisk and a bottom level
702 	if (blk_stack_limits(&t->limits, &bdev_get_queue(bdev)->limits,  in disk_stack_limits()
741 	q->limits.seg_boundary_mask = mask;  in blk_queue_segment_boundary()
752 	q->limits.virt_boundary_mask = mask;  in blk_queue_virt_boundary()
761 		q->limits.max_segment_size = UINT_MAX;  in blk_queue_virt_boundary()
777 	q->limits.dma_alignment = mask;  in blk_queue_dma_alignment()
799 	if (mask > q->limits.dma_alignment)  in blk_queue_update_dma_alignment()
800 		q->limits.dma_alignment = mask;  in blk_queue_update_dma_alignment()
941 	q->limits.zoned = model;  in disk_set_zoned()
959 	if (q->limits.misaligned)  in bdev_alignment_offset()
962 		return queue_limit_alignment_offset(&q->limits,  in bdev_alignment_offset()
964 	return q->limits.alignment_offset;  in bdev_alignment_offset()
973 		return queue_limit_discard_alignment(&q->limits,  in bdev_discard_alignment()
975 	return q->limits.discard_alignment;  in bdev_discard_alignment()