60 int scsi_init_sense_cache(struct Scsi_Host *shost)  in scsi_init_sense_cache()  argument
277 static void scsi_dec_host_busy(struct Scsi_Host *shost, struct scsi_cmnd *cmd)  in scsi_dec_host_busy()  argument
283 	if (unlikely(scsi_host_in_recovery(shost))) {  in scsi_dec_host_busy()
284 		spin_lock_irqsave(shost->host_lock, flags);  in scsi_dec_host_busy()
285 		if (shost->host_failed || shost->host_eh_scheduled)  in scsi_dec_host_busy()
286 			scsi_eh_wakeup(shost);  in scsi_dec_host_busy()
287 		spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_dec_host_busy()
294 	struct Scsi_Host *shost = sdev->host;  in scsi_device_unbusy()  local
297 	scsi_dec_host_busy(shost, cmd);  in scsi_device_unbusy()
320 	struct Scsi_Host *shost = current_sdev->host;  in scsi_single_lun_run()  local
325 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_single_lun_run()
327 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_single_lun_run()
337 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_single_lun_run()
347 		spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_single_lun_run()
349 		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()
377 static inline bool scsi_host_is_busy(struct Scsi_Host *shost)  in scsi_host_is_busy()  argument
379 	if (atomic_read(&shost->host_blocked) > 0)  in scsi_host_is_busy()
381 	if (shost->host_self_blocked)  in scsi_host_is_busy()
386 static void scsi_starved_list_run(struct Scsi_Host *shost)  in scsi_starved_list_run()  argument
392 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_starved_list_run()
393 	list_splice_init(&shost->starved_list, &starved_list);  in scsi_starved_list_run()
408 		if (scsi_host_is_busy(shost))  in scsi_starved_list_run()
416 				       &shost->starved_list);  in scsi_starved_list_run()
433 		spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_starved_list_run()
438 		spin_lock_irqsave(shost->host_lock, flags);  in scsi_starved_list_run()
441 	list_splice(&starved_list, &shost->starved_list);  in scsi_starved_list_run()
442 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_starved_list_run()
473 void scsi_run_host_queues(struct Scsi_Host *shost)  in scsi_run_host_queues()  argument
477 	shost_for_each_device(sdev, shost)  in scsi_run_host_queues()
1272 static inline int scsi_target_queue_ready(struct Scsi_Host *shost,  in scsi_target_queue_ready()  argument
1279 		spin_lock_irq(shost->host_lock);  in scsi_target_queue_ready()
1282 			spin_unlock_irq(shost->host_lock);  in scsi_target_queue_ready()
1286 		spin_unlock_irq(shost->host_lock);  in scsi_target_queue_ready()
1313 	spin_lock_irq(shost->host_lock);  in scsi_target_queue_ready()
1314 	list_move_tail(&sdev->starved_entry, &shost->starved_list);  in scsi_target_queue_ready()
1315 	spin_unlock_irq(shost->host_lock);  in scsi_target_queue_ready()
1328 				   struct Scsi_Host *shost,  in scsi_host_queue_ready()  argument
1332 	if (scsi_host_in_recovery(shost))  in scsi_host_queue_ready()
1335 	if (atomic_read(&shost->host_blocked) > 0) {  in scsi_host_queue_ready()
1336 		if (scsi_host_busy(shost) > 0)  in scsi_host_queue_ready()
1342 		if (atomic_dec_return(&shost->host_blocked) > 0)  in scsi_host_queue_ready()
1346 			shost_printk(KERN_INFO, shost,  in scsi_host_queue_ready()
1350 	if (shost->host_self_blocked)  in scsi_host_queue_ready()
1355 		spin_lock_irq(shost->host_lock);  in scsi_host_queue_ready()
1358 		spin_unlock_irq(shost->host_lock);  in scsi_host_queue_ready()
1366 	spin_lock_irq(shost->host_lock);  in scsi_host_queue_ready()
1368 		list_add_tail(&sdev->starved_entry, &shost->starved_list);  in scsi_host_queue_ready()
1369 	spin_unlock_irq(shost->host_lock);  in scsi_host_queue_ready()
1371 	scsi_dec_host_busy(shost, cmd);  in scsi_host_queue_ready()
1390 	struct Scsi_Host *shost;  in scsi_mq_lld_busy()  local
1395 	shost = sdev->host;  in scsi_mq_lld_busy()
1403 	if (scsi_host_in_recovery(shost) || scsi_device_is_busy(sdev))  in scsi_mq_lld_busy()
1528 static unsigned int scsi_mq_inline_sgl_size(struct Scsi_Host *shost)  in scsi_mq_inline_sgl_size()  argument
1530 	return min_t(unsigned int, shost->sg_tablesize, SCSI_INLINE_SG_CNT) *  in scsi_mq_inline_sgl_size()
1538 	struct Scsi_Host *shost = sdev->host;  in scsi_prepare_cmd()  local
1549 	sg = (void *)cmd + sizeof(struct scsi_cmnd) + shost->hostt->cmd_size;  in scsi_prepare_cmd()
1552 	if (scsi_host_get_prot(shost)) {  in scsi_prepare_cmd()
1646 	struct Scsi_Host *shost = sdev->host;  in scsi_queue_rq()  local
1664 	if (!scsi_target_queue_ready(shost, sdev))  in scsi_queue_rq()
1666 	if (!scsi_host_queue_ready(q, shost, sdev, cmd))  in scsi_queue_rq()
1699 	scsi_dec_host_busy(shost, cmd);  in scsi_queue_rq()
1748 	struct Scsi_Host *shost = set->driver_data;  in scsi_mq_init_request()  local
1759 	if (scsi_host_get_prot(shost)) {  in scsi_mq_init_request()
1761 			shost->hostt->cmd_size;  in scsi_mq_init_request()
1762 		cmd->prot_sdb = (void *)sg + scsi_mq_inline_sgl_size(shost);  in scsi_mq_init_request()
1765 	if (shost->hostt->init_cmd_priv) {  in scsi_mq_init_request()
1766 		ret = shost->hostt->init_cmd_priv(shost, cmd);  in scsi_mq_init_request()
1777 	struct Scsi_Host *shost = set->driver_data;  in scsi_mq_exit_request()  local
1780 	if (shost->hostt->exit_cmd_priv)  in scsi_mq_exit_request()
1781 		shost->hostt->exit_cmd_priv(shost, cmd);  in scsi_mq_exit_request()
1788 	struct Scsi_Host *shost = hctx->driver_data;  in scsi_mq_poll()  local
1790 	if (shost->hostt->mq_poll)  in scsi_mq_poll()
1791 		return shost->hostt->mq_poll(shost, hctx->queue_num);  in scsi_mq_poll()
1799 	struct Scsi_Host *shost = data;  in scsi_init_hctx()  local
1801 	hctx->driver_data = shost;  in scsi_init_hctx()
1807 	struct Scsi_Host *shost = container_of(set, struct Scsi_Host, tag_set);  in scsi_map_queues()  local
1809 	if (shost->hostt->map_queues)  in scsi_map_queues()
1810 		return shost->hostt->map_queues(shost);  in scsi_map_queues()
1814 void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q)  in __scsi_init_queue()  argument
1816 	struct device *dev = shost->dma_dev;  in __scsi_init_queue()
1821 	blk_queue_max_segments(q, min_t(unsigned short, shost->sg_tablesize,  in __scsi_init_queue()
1824 	if (scsi_host_prot_dma(shost)) {  in __scsi_init_queue()
1825 		shost->sg_prot_tablesize =  in __scsi_init_queue()
1826 			min_not_zero(shost->sg_prot_tablesize,  in __scsi_init_queue()
1828 		BUG_ON(shost->sg_prot_tablesize < shost->sg_tablesize);  in __scsi_init_queue()
1829 		blk_queue_max_integrity_segments(q, shost->sg_prot_tablesize);  in __scsi_init_queue()
1833 		shost->max_sectors = min_t(unsigned int, shost->max_sectors,  in __scsi_init_queue()
1836 	blk_queue_max_hw_sectors(q, shost->max_sectors);  in __scsi_init_queue()
1837 	blk_queue_segment_boundary(q, shost->dma_boundary);  in __scsi_init_queue()
1838 	dma_set_seg_boundary(dev, shost->dma_boundary);  in __scsi_init_queue()
1840 	blk_queue_max_segment_size(q, shost->max_segment_size);  in __scsi_init_queue()
1841 	blk_queue_virt_boundary(q, shost->virt_boundary_mask);  in __scsi_init_queue()
1879 	struct Scsi_Host *shost = hctx->driver_data;  in scsi_commit_rqs()  local
1881 	shost->hostt->commit_rqs(shost, hctx->queue_num);  in scsi_commit_rqs()
1906 int scsi_mq_setup_tags(struct Scsi_Host *shost)  in scsi_mq_setup_tags()  argument
1909 	struct blk_mq_tag_set *tag_set = &shost->tag_set;  in scsi_mq_setup_tags()
1912 				scsi_mq_inline_sgl_size(shost));  in scsi_mq_setup_tags()
1913 	cmd_size = sizeof(struct scsi_cmnd) + shost->hostt->cmd_size + sgl_size;  in scsi_mq_setup_tags()
1914 	if (scsi_host_get_prot(shost))  in scsi_mq_setup_tags()
1919 	if (shost->hostt->commit_rqs)  in scsi_mq_setup_tags()
1923 	tag_set->nr_hw_queues = shost->nr_hw_queues ? : 1;  in scsi_mq_setup_tags()
1924 	tag_set->nr_maps = shost->nr_maps ? : 1;  in scsi_mq_setup_tags()
1925 	tag_set->queue_depth = shost->can_queue;  in scsi_mq_setup_tags()
1930 		BLK_ALLOC_POLICY_TO_MQ_FLAG(shost->hostt->tag_alloc_policy);  in scsi_mq_setup_tags()
1931 	tag_set->driver_data = shost;  in scsi_mq_setup_tags()
1932 	if (shost->host_tagset)  in scsi_mq_setup_tags()
1938 void scsi_mq_destroy_tags(struct Scsi_Host *shost)  in scsi_mq_destroy_tags()  argument
1940 	blk_mq_free_tag_set(&shost->tag_set);  in scsi_mq_destroy_tags()
1971 void scsi_block_requests(struct Scsi_Host *shost)  in scsi_block_requests()  argument
1973 	shost->host_self_blocked = 1;  in scsi_block_requests()
1987 void scsi_unblock_requests(struct Scsi_Host *shost)  in scsi_unblock_requests()  argument
1989 	shost->host_self_blocked = 0;  in scsi_unblock_requests()
1990 	scsi_run_host_queues(shost);  in scsi_unblock_requests()
2843 scsi_host_block(struct Scsi_Host *shost)  in scsi_host_block()  argument
2852 	shost_for_each_device(sdev, shost) {  in scsi_host_block()
2866 	WARN_ON_ONCE(shost->tag_set.flags & BLK_MQ_F_BLOCKING);  in scsi_host_block()
2876 scsi_host_unblock(struct Scsi_Host *shost, int new_state)  in scsi_host_unblock()  argument
2881 	shost_for_each_device(sdev, shost) {  in scsi_host_unblock()