81 int scsi_init_sense_cache(struct Scsi_Host *shost)  in scsi_init_sense_cache()  argument
87 	cache = scsi_select_sense_cache(shost->unchecked_isa_dma);  in scsi_init_sense_cache()
91 	if (shost->unchecked_isa_dma) {  in scsi_init_sense_cache()
305 static void scsi_dec_host_busy(struct Scsi_Host *shost, struct scsi_cmnd *cmd)  in scsi_dec_host_busy()  argument
311 	if (unlikely(scsi_host_in_recovery(shost))) {  in scsi_dec_host_busy()
312 		spin_lock_irqsave(shost->host_lock, flags);  in scsi_dec_host_busy()
313 		if (shost->host_failed || shost->host_eh_scheduled)  in scsi_dec_host_busy()
314 			scsi_eh_wakeup(shost);  in scsi_dec_host_busy()
315 		spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_dec_host_busy()
322 	struct Scsi_Host *shost = sdev->host;  in scsi_device_unbusy()  local
325 	scsi_dec_host_busy(shost, cmd);  in scsi_device_unbusy()
347 	struct Scsi_Host *shost = current_sdev->host;  in scsi_single_lun_run()  local
352 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_single_lun_run()
354 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_single_lun_run()
364 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_single_lun_run()
374 		spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_single_lun_run()
376 		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()
404 static inline bool scsi_host_is_busy(struct Scsi_Host *shost)  in scsi_host_is_busy()  argument
406 	if (atomic_read(&shost->host_blocked) > 0)  in scsi_host_is_busy()
408 	if (shost->host_self_blocked)  in scsi_host_is_busy()
413 static void scsi_starved_list_run(struct Scsi_Host *shost)  in scsi_starved_list_run()  argument
419 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_starved_list_run()
420 	list_splice_init(&shost->starved_list, &starved_list);  in scsi_starved_list_run()
435 		if (scsi_host_is_busy(shost))  in scsi_starved_list_run()
443 				       &shost->starved_list);  in scsi_starved_list_run()
460 		spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_starved_list_run()
465 		spin_lock_irqsave(shost->host_lock, flags);  in scsi_starved_list_run()
468 	list_splice(&starved_list, &shost->starved_list);  in scsi_starved_list_run()
469 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_starved_list_run()
500 void scsi_run_host_queues(struct Scsi_Host *shost)  in scsi_run_host_queues()  argument
504 	shost_for_each_device(sdev, shost)  in scsi_run_host_queues()
1287 static inline int scsi_target_queue_ready(struct Scsi_Host *shost,  in scsi_target_queue_ready()  argument
1294 		spin_lock_irq(shost->host_lock);  in scsi_target_queue_ready()
1297 			spin_unlock_irq(shost->host_lock);  in scsi_target_queue_ready()
1301 		spin_unlock_irq(shost->host_lock);  in scsi_target_queue_ready()
1328 	spin_lock_irq(shost->host_lock);  in scsi_target_queue_ready()
1329 	list_move_tail(&sdev->starved_entry, &shost->starved_list);  in scsi_target_queue_ready()
1330 	spin_unlock_irq(shost->host_lock);  in scsi_target_queue_ready()
1343 				   struct Scsi_Host *shost,  in scsi_host_queue_ready()  argument
1347 	if (scsi_host_in_recovery(shost))  in scsi_host_queue_ready()
1350 	if (atomic_read(&shost->host_blocked) > 0) {  in scsi_host_queue_ready()
1351 		if (scsi_host_busy(shost) > 0)  in scsi_host_queue_ready()
1357 		if (atomic_dec_return(&shost->host_blocked) > 0)  in scsi_host_queue_ready()
1361 			shost_printk(KERN_INFO, shost,  in scsi_host_queue_ready()
1365 	if (shost->host_self_blocked)  in scsi_host_queue_ready()
1370 		spin_lock_irq(shost->host_lock);  in scsi_host_queue_ready()
1373 		spin_unlock_irq(shost->host_lock);  in scsi_host_queue_ready()
1381 	spin_lock_irq(shost->host_lock);  in scsi_host_queue_ready()
1383 		list_add_tail(&sdev->starved_entry, &shost->starved_list);  in scsi_host_queue_ready()
1384 	spin_unlock_irq(shost->host_lock);  in scsi_host_queue_ready()
1386 	scsi_dec_host_busy(shost, cmd);  in scsi_host_queue_ready()
1405 	struct Scsi_Host *shost;  in scsi_mq_lld_busy()  local
1410 	shost = sdev->host;  in scsi_mq_lld_busy()
1418 	if (scsi_host_in_recovery(shost) || scsi_device_is_busy(sdev))  in scsi_mq_lld_busy()
1539 static unsigned int scsi_mq_inline_sgl_size(struct Scsi_Host *shost)  in scsi_mq_inline_sgl_size()  argument
1541 	return min_t(unsigned int, shost->sg_tablesize, SCSI_INLINE_SG_CNT) *  in scsi_mq_inline_sgl_size()
1549 	struct Scsi_Host *shost = sdev->host;  in scsi_prepare_cmd()  local
1562 	sg = (void *)cmd + sizeof(struct scsi_cmnd) + shost->hostt->cmd_size;  in scsi_prepare_cmd()
1565 	if (scsi_host_get_prot(shost)) {  in scsi_prepare_cmd()
1644 	struct Scsi_Host *shost = sdev->host;  in scsi_queue_rq()  local
1660 	if (!scsi_target_queue_ready(shost, sdev))  in scsi_queue_rq()
1662 	if (!scsi_host_queue_ready(q, shost, sdev, cmd))  in scsi_queue_rq()
1695 	scsi_dec_host_busy(shost, cmd);  in scsi_queue_rq()
1738 	struct Scsi_Host *shost = set->driver_data;  in scsi_mq_init_request()  local
1739 	const bool unchecked_isa_dma = shost->unchecked_isa_dma;  in scsi_mq_init_request()
1752 	if (scsi_host_get_prot(shost)) {  in scsi_mq_init_request()
1754 			shost->hostt->cmd_size;  in scsi_mq_init_request()
1755 		cmd->prot_sdb = (void *)sg + scsi_mq_inline_sgl_size(shost);  in scsi_mq_init_request()
1758 	if (shost->hostt->init_cmd_priv) {  in scsi_mq_init_request()
1759 		ret = shost->hostt->init_cmd_priv(shost, cmd);  in scsi_mq_init_request()
1771 	struct Scsi_Host *shost = set->driver_data;  in scsi_mq_exit_request()  local
1774 	if (shost->hostt->exit_cmd_priv)  in scsi_mq_exit_request()
1775 		shost->hostt->exit_cmd_priv(shost, cmd);  in scsi_mq_exit_request()
1782 	struct Scsi_Host *shost = container_of(set, struct Scsi_Host, tag_set);  in scsi_map_queues()  local
1784 	if (shost->hostt->map_queues)  in scsi_map_queues()
1785 		return shost->hostt->map_queues(shost);  in scsi_map_queues()
1789 void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q)  in __scsi_init_queue()  argument
1791 	struct device *dev = shost->dma_dev;  in __scsi_init_queue()
1796 	blk_queue_max_segments(q, min_t(unsigned short, shost->sg_tablesize,  in __scsi_init_queue()
1799 	if (scsi_host_prot_dma(shost)) {  in __scsi_init_queue()
1800 		shost->sg_prot_tablesize =  in __scsi_init_queue()
1801 			min_not_zero(shost->sg_prot_tablesize,  in __scsi_init_queue()
1803 		BUG_ON(shost->sg_prot_tablesize < shost->sg_tablesize);  in __scsi_init_queue()
1804 		blk_queue_max_integrity_segments(q, shost->sg_prot_tablesize);  in __scsi_init_queue()
1808 		shost->max_sectors = min_t(unsigned int, shost->max_sectors,  in __scsi_init_queue()
1811 	blk_queue_max_hw_sectors(q, shost->max_sectors);  in __scsi_init_queue()
1812 	if (shost->unchecked_isa_dma)  in __scsi_init_queue()
1814 	blk_queue_segment_boundary(q, shost->dma_boundary);  in __scsi_init_queue()
1815 	dma_set_seg_boundary(dev, shost->dma_boundary);  in __scsi_init_queue()
1817 	blk_queue_max_segment_size(q, shost->max_segment_size);  in __scsi_init_queue()
1818 	blk_queue_virt_boundary(q, shost->virt_boundary_mask);  in __scsi_init_queue()
1854 	struct Scsi_Host *shost = sdev->host;  in scsi_commit_rqs()  local
1856 	shost->hostt->commit_rqs(shost, hctx->queue_num);  in scsi_commit_rqs()
1889 int scsi_mq_setup_tags(struct Scsi_Host *shost)  in scsi_mq_setup_tags()  argument
1892 	struct blk_mq_tag_set *tag_set = &shost->tag_set;  in scsi_mq_setup_tags()
1895 				scsi_mq_inline_sgl_size(shost));  in scsi_mq_setup_tags()
1896 	cmd_size = sizeof(struct scsi_cmnd) + shost->hostt->cmd_size + sgl_size;  in scsi_mq_setup_tags()
1897 	if (scsi_host_get_prot(shost))  in scsi_mq_setup_tags()
1902 	if (shost->hostt->commit_rqs)  in scsi_mq_setup_tags()
1906 	tag_set->nr_hw_queues = shost->nr_hw_queues ? : 1;  in scsi_mq_setup_tags()
1907 	tag_set->queue_depth = shost->can_queue;  in scsi_mq_setup_tags()
1912 		BLK_ALLOC_POLICY_TO_MQ_FLAG(shost->hostt->tag_alloc_policy);  in scsi_mq_setup_tags()
1913 	tag_set->driver_data = shost;  in scsi_mq_setup_tags()
1914 	if (shost->host_tagset)  in scsi_mq_setup_tags()
1920 void scsi_mq_destroy_tags(struct Scsi_Host *shost)  in scsi_mq_destroy_tags()  argument
1922 	blk_mq_free_tag_set(&shost->tag_set);  in scsi_mq_destroy_tags()
1953 void scsi_block_requests(struct Scsi_Host *shost)  in scsi_block_requests()  argument
1955 	shost->host_self_blocked = 1;  in scsi_block_requests()
1969 void scsi_unblock_requests(struct Scsi_Host *shost)  in scsi_unblock_requests()  argument
1971 	shost->host_self_blocked = 0;  in scsi_unblock_requests()
1972 	scsi_run_host_queues(shost);  in scsi_unblock_requests()
2828 scsi_host_block(struct Scsi_Host *shost)  in scsi_host_block()  argument
2837 	shost_for_each_device(sdev, shost) {  in scsi_host_block()
2851 	WARN_ON_ONCE(shost->tag_set.flags & BLK_MQ_F_BLOCKING);  in scsi_host_block()
2861 scsi_host_unblock(struct Scsi_Host *shost, int new_state)  in scsi_host_unblock()  argument
2866 	shost_for_each_device(sdev, shost) {  in scsi_host_unblock()