1 /* SPDX-License-Identifier: GPL-2.0 */
11 #include <linux/blk-mq.h>
31  * enum scsi_timeout_action - How to handle a command that timed out.
49 	 * Additional per-command data allocated for the driver.
59 	 * command.  It must also push it to the HBA if the scsi_cmnd
77          * For compatibility, any other non-zero return is treated the
123 	 * When unknown ioctl is passed return -ENOIOCTLCMD.
136 	 * define one of these if you don't want to - there is a default
139 	 * own strategy routine, this is where it is specified.  Note - the
168 	 * Return values: 0 on success, non-0 on failure
202 	 *     device->sdtr will be true if the device supports SDTR messages.
207 	 * 6.  Return 0 on success, non-0 on error.  The device will be marked
209 	 *     non-0, your slave_destroy routine will never get called for this
211 	 *     up after yourself before returning non-0
236 	 * Return values: 0 on success, non-0 on failure
294 	 * SCSI interface of blk_poll - poll for IO completions.
357 	 * Return values: 0 on success, -ve value on failure.
373 	 * This determines if we will use a non-interrupt driven
375 	 * of simultaneous commands a single hw queue in HBA will accept.
382 	 * the case, then it must be reserved.  Please set this_id to -1 if
390 	 * of scatter-gather.
417 	 * individual devices (e.g. 256 for SCSI-1).
451 	 * True if the low-level driver performs its own reset-settle delays.
458 	/* True if the host uses host-wide tagspace */
513 		spin_lock_irqsave(shost->host_lock, irq_flags);		\
515 		spin_unlock_irqrestore(shost->host_lock, irq_flags);	\
620 	 * In scsi-mq mode, the number of hardware queues supported by the LLD.
656 	/* True if the host uses host-wide tagspace */
726 	dev_printk(prefix, &(shost)->shost_gendev, fmt, ##a)
730 	return (void *)shost->hostdata;  in shost_priv()
738 		if (!dev->parent)  in dev_to_shost()
740 		dev = dev->parent;  in dev_to_shost()
747 	return shost->shost_state == SHOST_RECOVERY ||  in scsi_host_in_recovery()
748 		shost->shost_state == SHOST_CANCEL_RECOVERY ||  in scsi_host_in_recovery()
749 		shost->shost_state == SHOST_DEL_RECOVERY ||  in scsi_host_in_recovery()
750 		shost->tmf_in_progress;  in scsi_host_in_recovery()
786         return shost->shost_gendev.parent;  in scsi_get_device()
790  * scsi_host_scan_allowed - Is scanning of this host allowed
795 	return shost->shost_state == SHOST_RUNNING ||  in scsi_host_scan_allowed()
796 	       shost->shost_state == SHOST_RECOVERY;  in scsi_host_scan_allowed()
821 	SHOST_DIX_TYPE0_PROTECTION = 1 << 3, /* DIX between OS and HBA only */
834 	shost->prot_capabilities = mask;  in scsi_host_set_prot()
839 	return shost->prot_capabilities;  in scsi_host_get_prot()
844 	return shost->prot_capabilities >= SHOST_DIX_TYPE0_PROTECTION;  in scsi_host_prot_dma()
849 	static unsigned char cap[] = { 0,  in scsi_host_dif_capable()  local
854 	if (target_type >= ARRAY_SIZE(cap))  in scsi_host_dif_capable()
857 	return shost->prot_capabilities & cap[target_type] ? target_type : 0;  in scsi_host_dif_capable()
863 	static unsigned char cap[] = { SHOST_DIX_TYPE0_PROTECTION,  in scsi_host_dix_capable()  local
868 	if (target_type >= ARRAY_SIZE(cap))  in scsi_host_dix_capable()
871 	return shost->prot_capabilities & cap[target_type];  in scsi_host_dix_capable()
877  * All DIX-capable initiators must support the T10-mandated CRC
892 	shost->prot_guard_type = type;  in scsi_host_set_guard()
897 	return shost->prot_guard_type;  in scsi_host_get_guard()