82 int scsi_init_sense_cache(struct Scsi_Host *shost)  in scsi_init_sense_cache()  argument
88 	cache = scsi_select_sense_cache(shost->unchecked_isa_dma);  in scsi_init_sense_cache()
92 	if (shost->unchecked_isa_dma) {  in scsi_init_sense_cache()
332 static void scsi_dec_host_busy(struct Scsi_Host *shost)  in scsi_dec_host_busy()  argument
337 	atomic_dec(&shost->host_busy);  in scsi_dec_host_busy()
338 	if (unlikely(scsi_host_in_recovery(shost))) {  in scsi_dec_host_busy()
339 		spin_lock_irqsave(shost->host_lock, flags);  in scsi_dec_host_busy()
340 		if (shost->host_failed || shost->host_eh_scheduled)  in scsi_dec_host_busy()
341 			scsi_eh_wakeup(shost);  in scsi_dec_host_busy()
342 		spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_dec_host_busy()
349 	struct Scsi_Host *shost = sdev->host;  in scsi_device_unbusy()  local
352 	scsi_dec_host_busy(shost);  in scsi_device_unbusy()
374 	struct Scsi_Host *shost = current_sdev->host;  in scsi_single_lun_run()  local
379 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_single_lun_run()
381 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_single_lun_run()
391 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_single_lun_run()
401 		spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_single_lun_run()
403 		spin_lock_irqsave(shost->host_lock, flags);  in scsi_single_lun_run()
408 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_single_lun_run()
431 static inline bool scsi_host_is_busy(struct Scsi_Host *shost)  in scsi_host_is_busy()  argument
433 	if (shost->can_queue > 0 &&  in scsi_host_is_busy()
434 	    atomic_read(&shost->host_busy) >= shost->can_queue)  in scsi_host_is_busy()
436 	if (atomic_read(&shost->host_blocked) > 0)  in scsi_host_is_busy()
438 	if (shost->host_self_blocked)  in scsi_host_is_busy()
443 static void scsi_starved_list_run(struct Scsi_Host *shost)  in scsi_starved_list_run()  argument
449 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_starved_list_run()
450 	list_splice_init(&shost->starved_list, &starved_list);  in scsi_starved_list_run()
465 		if (scsi_host_is_busy(shost))  in scsi_starved_list_run()
473 				       &shost->starved_list);  in scsi_starved_list_run()
490 		spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_starved_list_run()
495 		spin_lock_irqsave(shost->host_lock, flags);  in scsi_starved_list_run()
498 	list_splice(&starved_list, &shost->starved_list);  in scsi_starved_list_run()
499 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_starved_list_run()
536 void scsi_run_host_queues(struct Scsi_Host *shost)  in scsi_run_host_queues()  argument
540 	shost_for_each_device(sdev, shost)  in scsi_run_host_queues()
1108 	struct Scsi_Host *shost = sdev->host;  in scsi_add_cmd_to_list()  local
1111 	if (shost->use_cmd_list) {  in scsi_add_cmd_to_list()
1122 	struct Scsi_Host *shost = sdev->host;  in scsi_del_cmd_from_list()  local
1125 	if (shost->use_cmd_list) {  in scsi_del_cmd_from_list()
1313 static inline int scsi_target_queue_ready(struct Scsi_Host *shost,  in scsi_target_queue_ready()  argument
1320 		spin_lock_irq(shost->host_lock);  in scsi_target_queue_ready()
1323 			spin_unlock_irq(shost->host_lock);  in scsi_target_queue_ready()
1327 		spin_unlock_irq(shost->host_lock);  in scsi_target_queue_ready()
1354 	spin_lock_irq(shost->host_lock);  in scsi_target_queue_ready()
1355 	list_move_tail(&sdev->starved_entry, &shost->starved_list);  in scsi_target_queue_ready()
1356 	spin_unlock_irq(shost->host_lock);  in scsi_target_queue_ready()
1369 				   struct Scsi_Host *shost,  in scsi_host_queue_ready()  argument
1374 	if (scsi_host_in_recovery(shost))  in scsi_host_queue_ready()
1377 	busy = atomic_inc_return(&shost->host_busy) - 1;  in scsi_host_queue_ready()
1378 	if (atomic_read(&shost->host_blocked) > 0) {  in scsi_host_queue_ready()
1385 		if (atomic_dec_return(&shost->host_blocked) > 0)  in scsi_host_queue_ready()
1389 			shost_printk(KERN_INFO, shost,  in scsi_host_queue_ready()
1393 	if (shost->can_queue > 0 && busy >= shost->can_queue)  in scsi_host_queue_ready()
1395 	if (shost->host_self_blocked)  in scsi_host_queue_ready()
1400 		spin_lock_irq(shost->host_lock);  in scsi_host_queue_ready()
1403 		spin_unlock_irq(shost->host_lock);  in scsi_host_queue_ready()
1409 	spin_lock_irq(shost->host_lock);  in scsi_host_queue_ready()
1411 		list_add_tail(&sdev->starved_entry, &shost->starved_list);  in scsi_host_queue_ready()
1412 	spin_unlock_irq(shost->host_lock);  in scsi_host_queue_ready()
1414 	scsi_dec_host_busy(shost);  in scsi_host_queue_ready()
1433 	struct Scsi_Host *shost;  in scsi_mq_lld_busy()  local
1438 	shost = sdev->host;  in scsi_mq_lld_busy()
1446 	if (scsi_host_in_recovery(shost) || scsi_device_is_busy(sdev))  in scsi_mq_lld_busy()
1573 static unsigned int scsi_mq_inline_sgl_size(struct Scsi_Host *shost)  in scsi_mq_inline_sgl_size()  argument
1575 	return min_t(unsigned int, shost->sg_tablesize, SCSI_INLINE_SG_CNT) *  in scsi_mq_inline_sgl_size()
1583 	struct Scsi_Host *shost = sdev->host;  in scsi_mq_prep_fn()  local
1592 	sg = (void *)cmd + sizeof(struct scsi_cmnd) + shost->hostt->cmd_size;  in scsi_mq_prep_fn()
1595 	if (scsi_host_get_prot(shost)) {  in scsi_mq_prep_fn()
1650 	struct Scsi_Host *shost = sdev->host;  in scsi_queue_rq()  local
1666 	if (!scsi_target_queue_ready(shost, sdev))  in scsi_queue_rq()
1668 	if (!scsi_host_queue_ready(q, shost, sdev))  in scsi_queue_rq()
1700 	scsi_dec_host_busy(shost);  in scsi_queue_rq()
1742 	struct Scsi_Host *shost = set->driver_data;  in scsi_mq_init_request()  local
1743 	const bool unchecked_isa_dma = shost->unchecked_isa_dma;  in scsi_mq_init_request()
1755 	if (scsi_host_get_prot(shost)) {  in scsi_mq_init_request()
1757 			shost->hostt->cmd_size;  in scsi_mq_init_request()
1758 		cmd->prot_sdb = (void *)sg + scsi_mq_inline_sgl_size(shost);  in scsi_mq_init_request()
1775 	struct Scsi_Host *shost = container_of(set, struct Scsi_Host, tag_set);  in scsi_map_queues()  local
1777 	if (shost->hostt->map_queues)  in scsi_map_queues()
1778 		return shost->hostt->map_queues(shost);  in scsi_map_queues()
1782 void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q)  in __scsi_init_queue()  argument
1784 	struct device *dev = shost->dma_dev;  in __scsi_init_queue()
1789 	blk_queue_max_segments(q, min_t(unsigned short, shost->sg_tablesize,  in __scsi_init_queue()
1792 	if (scsi_host_prot_dma(shost)) {  in __scsi_init_queue()
1793 		shost->sg_prot_tablesize =  in __scsi_init_queue()
1794 			min_not_zero(shost->sg_prot_tablesize,  in __scsi_init_queue()
1796 		BUG_ON(shost->sg_prot_tablesize < shost->sg_tablesize);  in __scsi_init_queue()
1797 		blk_queue_max_integrity_segments(q, shost->sg_prot_tablesize);  in __scsi_init_queue()
1801 		shost->max_sectors = min_t(unsigned int, shost->max_sectors,  in __scsi_init_queue()
1804 	blk_queue_max_hw_sectors(q, shost->max_sectors);  in __scsi_init_queue()
1805 	if (shost->unchecked_isa_dma)  in __scsi_init_queue()
1807 	blk_queue_segment_boundary(q, shost->dma_boundary);  in __scsi_init_queue()
1808 	dma_set_seg_boundary(dev, shost->dma_boundary);  in __scsi_init_queue()
1810 	blk_queue_max_segment_size(q, shost->max_segment_size);  in __scsi_init_queue()
1811 	blk_queue_virt_boundary(q, shost->virt_boundary_mask);  in __scsi_init_queue()
1847 	struct Scsi_Host *shost = sdev->host;  in scsi_commit_rqs()  local
1849 	shost->hostt->commit_rqs(shost, hctx->queue_num);  in scsi_commit_rqs()
1882 int scsi_mq_setup_tags(struct Scsi_Host *shost)  in scsi_mq_setup_tags()  argument
1887 				scsi_mq_inline_sgl_size(shost));  in scsi_mq_setup_tags()
1888 	cmd_size = sizeof(struct scsi_cmnd) + shost->hostt->cmd_size + sgl_size;  in scsi_mq_setup_tags()
1889 	if (scsi_host_get_prot(shost))  in scsi_mq_setup_tags()
1893 	memset(&shost->tag_set, 0, sizeof(shost->tag_set));  in scsi_mq_setup_tags()
1894 	if (shost->hostt->commit_rqs)  in scsi_mq_setup_tags()
1895 		shost->tag_set.ops = &scsi_mq_ops;  in scsi_mq_setup_tags()
1897 		shost->tag_set.ops = &scsi_mq_ops_no_commit;  in scsi_mq_setup_tags()
1898 	shost->tag_set.nr_hw_queues = shost->nr_hw_queues ? : 1;  in scsi_mq_setup_tags()
1899 	shost->tag_set.queue_depth = shost->can_queue;  in scsi_mq_setup_tags()
1900 	shost->tag_set.cmd_size = cmd_size;  in scsi_mq_setup_tags()
1901 	shost->tag_set.numa_node = NUMA_NO_NODE;  in scsi_mq_setup_tags()
1902 	shost->tag_set.flags = BLK_MQ_F_SHOULD_MERGE;  in scsi_mq_setup_tags()
1903 	shost->tag_set.flags |=  in scsi_mq_setup_tags()
1904 		BLK_ALLOC_POLICY_TO_MQ_FLAG(shost->hostt->tag_alloc_policy);  in scsi_mq_setup_tags()
1905 	shost->tag_set.driver_data = shost;  in scsi_mq_setup_tags()
1907 	return blk_mq_alloc_tag_set(&shost->tag_set);  in scsi_mq_setup_tags()
1910 void scsi_mq_destroy_tags(struct Scsi_Host *shost)  in scsi_mq_destroy_tags()  argument
1912 	blk_mq_free_tag_set(&shost->tag_set);  in scsi_mq_destroy_tags()
1952 void scsi_block_requests(struct Scsi_Host *shost)  in scsi_block_requests()  argument
1954 	shost->host_self_blocked = 1;  in scsi_block_requests()
1978 void scsi_unblock_requests(struct Scsi_Host *shost)  in scsi_unblock_requests()  argument
1980 	shost->host_self_blocked = 0;  in scsi_unblock_requests()
1981 	scsi_run_host_queues(shost);  in scsi_unblock_requests()