[SCSI] mpt2sas: LUN Reset Support (993e0da7) · Commits · e / devices / android_kernel_teracube_2e

drivers/scsi/mpt2sas/mpt2sas_scsih.c

+109 −2

Original line number	Original line	Diff line number	Diff line
	@@ -883,6 +883,41 @@ _scsih_scsi_lookup_find_by_target(struct MPT2SAS_ADAPTER *ioc, int id,
	return found;		return found;
	}		}

			/**
			* _scsih_scsi_lookup_find_by_lun - search for matching channel:id:lun
			* @ioc: per adapter object
			* @id: target id
			* @lun: lun number
			* @channel: channel
			* Context: This function will acquire ioc->scsi_lookup_lock.
			*
			* This will search for a matching channel:id:lun in the scsi_lookup array,
			* returning 1 if found.
			*/
			static u8
			_scsih_scsi_lookup_find_by_lun(struct MPT2SAS_ADAPTER *ioc, int id,
			unsigned int lun, int channel)
			{
			u8 found;
			unsigned long flags;
			int i;

			spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
			found = 0;
			for (i = 0 ; i < ioc->request_depth; i++) {
			if (ioc->scsi_lookup[i].scmd &&
			(ioc->scsi_lookup[i].scmd->device->id == id &&
			ioc->scsi_lookup[i].scmd->device->channel == channel &&
			ioc->scsi_lookup[i].scmd->device->lun == lun)) {
			found = 1;
			goto out;
			}
			}
			out:
			spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
			return found;
			}

	/**		/**
	* _scsih_get_chain_buffer_dma - obtain block of chains (dma address)		* _scsih_get_chain_buffer_dma - obtain block of chains (dma address)
	* @ioc: per adapter object		* @ioc: per adapter object
	@@ -1889,7 +1924,6 @@ scsih_abort(struct scsi_cmnd *scmd)
	return r;		return r;
	}		}


	/**		/**
	* scsih_dev_reset - eh threads main device reset routine		* scsih_dev_reset - eh threads main device reset routine
	* @sdev: scsi device struct		* @sdev: scsi device struct
	@@ -1906,7 +1940,7 @@ scsih_dev_reset(struct scsi_cmnd *scmd)
	u16 handle;		u16 handle;
	int r;		int r;

	printk(MPT2SAS_INFO_FMT "attempting target reset! scmd(%p)\n",		printk(MPT2SAS_INFO_FMT "attempting device reset! scmd(%p)\n",
	ioc->name, scmd);		ioc->name, scmd);
	scsi_print_command(scmd);		scsi_print_command(scmd);

	@@ -1939,6 +1973,78 @@ scsih_dev_reset(struct scsi_cmnd *scmd)
	goto out;		goto out;
	}		}

			mutex_lock(&ioc->tm_cmds.mutex);
			mpt2sas_scsih_issue_tm(ioc, handle, 0,
			MPI2_SCSITASKMGMT_TASKTYPE_LOGICAL_UNIT_RESET, scmd->device->lun,
			30);

			/*
			* sanity check see whether all commands to this device been
			* completed
			*/
			if (_scsih_scsi_lookup_find_by_lun(ioc, scmd->device->id,
			scmd->device->lun, scmd->device->channel))
			r = FAILED;
			else
			r = SUCCESS;
			ioc->tm_cmds.status = MPT2_CMD_NOT_USED;
			mutex_unlock(&ioc->tm_cmds.mutex);

			out:
			printk(MPT2SAS_INFO_FMT "device reset: %s scmd(%p)\n",
			ioc->name, ((r == SUCCESS) ? "SUCCESS" : "FAILED"), scmd);
			return r;
			}

			/**
			* scsih_target_reset - eh threads main target reset routine
			* @sdev: scsi device struct
			*
			* Returns SUCCESS if command aborted else FAILED
			*/
			static int
			scsih_target_reset(struct scsi_cmnd *scmd)
			{
			struct MPT2SAS_ADAPTER *ioc = shost_priv(scmd->device->host);
			struct MPT2SAS_DEVICE *sas_device_priv_data;
			struct _sas_device *sas_device;
			unsigned long flags;
			u16 handle;
			int r;

			printk(MPT2SAS_INFO_FMT "attempting target reset! scmd(%p)\n",
			ioc->name, scmd);
			scsi_print_command(scmd);

			sas_device_priv_data = scmd->device->hostdata;
			if (!sas_device_priv_data \|\| !sas_device_priv_data->sas_target) {
			printk(MPT2SAS_INFO_FMT "target been deleted! scmd(%p)\n",
			ioc->name, scmd);
			scmd->result = DID_NO_CONNECT << 16;
			scmd->scsi_done(scmd);
			r = SUCCESS;
			goto out;
			}

			/* for hidden raid components obtain the volume_handle */
			handle = 0;
			if (sas_device_priv_data->sas_target->flags &
			MPT_TARGET_FLAGS_RAID_COMPONENT) {
			spin_lock_irqsave(&ioc->sas_device_lock, flags);
			sas_device = _scsih_sas_device_find_by_handle(ioc,
			sas_device_priv_data->sas_target->handle);
			if (sas_device)
			handle = sas_device->volume_handle;
			spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
			} else
			handle = sas_device_priv_data->sas_target->handle;

			if (!handle) {
			scmd->result = DID_RESET << 16;
			r = FAILED;
			goto out;
			}

	mutex_lock(&ioc->tm_cmds.mutex);		mutex_lock(&ioc->tm_cmds.mutex);
	mpt2sas_scsih_issue_tm(ioc, handle, 0,		mpt2sas_scsih_issue_tm(ioc, handle, 0,
	MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET, 0, 30);		MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET, 0, 30);
	@@ -5255,6 +5361,7 @@ static struct scsi_host_template scsih_driver_template = {
	.change_queue_type = scsih_change_queue_type,		.change_queue_type = scsih_change_queue_type,
	.eh_abort_handler = scsih_abort,		.eh_abort_handler = scsih_abort,
	.eh_device_reset_handler = scsih_dev_reset,		.eh_device_reset_handler = scsih_dev_reset,
			.eh_target_reset_handler = scsih_target_reset,
	.eh_host_reset_handler = scsih_host_reset,		.eh_host_reset_handler = scsih_host_reset,
	.bios_param = scsih_bios_param,		.bios_param = scsih_bios_param,
	.can_queue = 1,		.can_queue = 1,