Пример #1
0
/*
 * fnic_queue_wq_copy_desc
 * Routine to enqueue a wq copy desc
 */
static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
					  struct vnic_wq_copy *wq,
					  struct fnic_io_req *io_req,
					  struct scsi_cmnd *sc,
					  int sg_count)
{
	struct scatterlist *sg;
	struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
	struct fc_rport_libfc_priv *rp = rport->dd_data;
	struct host_sg_desc *desc;
	u8 pri_tag = 0;
	unsigned int i;
	unsigned long intr_flags;
	int flags;
	u8 exch_flags;
	struct scsi_lun fc_lun;
	char msg[2];

	if (sg_count) {
		/* For each SGE, create a device desc entry */
		desc = io_req->sgl_list;
		for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
			desc->addr = cpu_to_le64(sg_dma_address(sg));
			desc->len = cpu_to_le32(sg_dma_len(sg));
			desc->_resvd = 0;
			desc++;
		}

		io_req->sgl_list_pa = pci_map_single
			(fnic->pdev,
			 io_req->sgl_list,
			 sizeof(io_req->sgl_list[0]) * sg_count,
			 PCI_DMA_TODEVICE);
	}
Пример #2
0
static int fnic_slave_alloc(struct scsi_device *sdev)
{
	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));

	if (!rport || fc_remote_port_chkready(rport))
		return -ENXIO;

	scsi_change_queue_depth(sdev, fnic_max_qdepth);
	return 0;
}
Пример #3
0
static int fnic_slave_alloc(struct scsi_device *sdev)
{
	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));

	sdev->tagged_supported = 1;

	if (!rport || fc_remote_port_chkready(rport))
		return -ENXIO;

	scsi_activate_tcq(sdev, FNIC_DFLT_QUEUE_DEPTH);
	return 0;
}
Пример #4
0
static
int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt)
{
	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
	struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device));
	int    status, scsi_result, ret;

	/* reset the status for this request */
	scpnt->result = 0;
	scpnt->host_scribble = NULL;

	scsi_result = fc_remote_port_chkready(rport);
	if (unlikely(scsi_result)) {
		scpnt->result = scsi_result;
		zfcp_dbf_scsi_fail_send(scpnt);
		scpnt->scsi_done(scpnt);
		return 0;
	}

	status = atomic_read(&zfcp_sdev->status);
	if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) &&
		     !(atomic_read(&zfcp_sdev->port->status) &
		       ZFCP_STATUS_COMMON_ERP_FAILED)) {
		/* only LUN access denied, but port is good
		 * not covered by FC transport, have to fail here */
		zfcp_scsi_command_fail(scpnt, DID_ERROR);
		return 0;
	}

	if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) {
		/* This could be either
		 * open LUN pending: this is temporary, will result in
		 *	open LUN or ERP_FAILED, so retry command
		 * call to rport_delete pending: mimic retry from
		 * 	fc_remote_port_chkready until rport is BLOCKED
		 */
		zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY);
		return 0;
	}

	ret = zfcp_fsf_fcp_cmnd(scpnt);
	if (unlikely(ret == -EBUSY))
		return SCSI_MLQUEUE_DEVICE_BUSY;
	else if (unlikely(ret < 0))
		return SCSI_MLQUEUE_HOST_BUSY;

	return ret;
}
static int fnic_slave_alloc(struct scsi_device *sdev)
{
	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
	struct fc_lport *lp = shost_priv(sdev->host);
	struct fnic *fnic = lport_priv(lp);

	sdev->tagged_supported = 1;

	if (!rport || fc_remote_port_chkready(rport))
		return -ENXIO;

	if (sdev->tagged_supported)
		scsi_activate_tcq(sdev, fnic_max_qdepth);
	rport->dev_loss_tmo = fnic->config.port_down_timeout / 1000;
	return 0;
}
Пример #6
0
static int zfcp_scsi_slave_alloc(struct scsi_device *sdev)
{
	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
	struct zfcp_adapter *adapter =
		(struct zfcp_adapter *) sdev->host->hostdata[0];
	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
	struct zfcp_port *port;
	struct zfcp_unit *unit;
	int npiv = adapter->connection_features & FSF_FEATURE_NPIV_MODE;

	zfcp_sdev->erp_action.adapter = adapter;
	zfcp_sdev->erp_action.sdev = sdev;

	port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
	if (!port)
		return -ENXIO;

	zfcp_sdev->erp_action.port = port;

	unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev));
	if (unit)
		put_device(&unit->dev);

	if (!unit && !(allow_lun_scan && npiv)) {
		put_device(&port->dev);
		return -ENXIO;
	}

	zfcp_sdev->port = port;
	zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF;
	zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF;
	zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF;
	zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF;
	zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF;
	zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF;
	spin_lock_init(&zfcp_sdev->latencies.lock);

	zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
	zfcp_erp_lun_reopen(sdev, 0, "scsla_1");
	zfcp_erp_wait(port->adapter);

	return 0;
}
static
int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt)
{
	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
	struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device));
	int    status, scsi_result, ret;

	
	scpnt->result = 0;
	scpnt->host_scribble = NULL;

	scsi_result = fc_remote_port_chkready(rport);
	if (unlikely(scsi_result)) {
		scpnt->result = scsi_result;
		zfcp_dbf_scsi_fail_send(scpnt);
		scpnt->scsi_done(scpnt);
		return 0;
	}

	status = atomic_read(&zfcp_sdev->status);
	if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) &&
		     !(atomic_read(&zfcp_sdev->port->status) &
		       ZFCP_STATUS_COMMON_ERP_FAILED)) {
		zfcp_scsi_command_fail(scpnt, DID_ERROR);
		return 0;
	}

	if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) {
		zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY);
		return 0;
	}

	ret = zfcp_fsf_fcp_cmnd(scpnt);
	if (unlikely(ret == -EBUSY))
		return SCSI_MLQUEUE_DEVICE_BUSY;
	else if (unlikely(ret < 0))
		return SCSI_MLQUEUE_HOST_BUSY;

	return ret;
}
Пример #8
0
static void zfcp_scsi_forget_cmnds(struct zfcp_scsi_dev *zsdev, u8 tm_flags)
{
	struct zfcp_adapter *adapter = zsdev->port->adapter;
	struct zfcp_scsi_req_filter filter = {
		.tmf_scope = FCP_TMF_TGT_RESET,
		.port_handle = zsdev->port->handle,
	};
	unsigned long flags;

	if (tm_flags == FCP_TMF_LUN_RESET) {
		filter.tmf_scope = FCP_TMF_LUN_RESET;
		filter.lun_handle = zsdev->lun_handle;
	}

	/*
	 * abort_lock secures against other processings - in the abort-function
	 * and normal cmnd-handler - of (struct zfcp_fsf_req *)->data
	 */
	write_lock_irqsave(&adapter->abort_lock, flags);
	zfcp_reqlist_apply_for_all(adapter->req_list, zfcp_scsi_forget_cmnd,
				   &filter);
	write_unlock_irqrestore(&adapter->abort_lock, flags);
}

/**
 * zfcp_scsi_task_mgmt_function() - Send a task management function (sync).
 * @sdev: Pointer to SCSI device to send the task management command to.
 * @tm_flags: Task management flags,
 *	      here we only handle %FCP_TMF_TGT_RESET or %FCP_TMF_LUN_RESET.
 */
static int zfcp_scsi_task_mgmt_function(struct scsi_device *sdev, u8 tm_flags)
{
	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
	struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
	struct zfcp_fsf_req *fsf_req = NULL;
	int retval = SUCCESS, ret;
	int retry = 3;

	while (retry--) {
		fsf_req = zfcp_fsf_fcp_task_mgmt(sdev, tm_flags);
		if (fsf_req)
			break;

		zfcp_dbf_scsi_devreset("wait", sdev, tm_flags, NULL);
		zfcp_erp_wait(adapter);
		ret = fc_block_rport(rport);
		if (ret) {
			zfcp_dbf_scsi_devreset("fiof", sdev, tm_flags, NULL);
			return ret;
		}

		if (!(atomic_read(&adapter->status) &
		      ZFCP_STATUS_COMMON_RUNNING)) {
			zfcp_dbf_scsi_devreset("nres", sdev, tm_flags, NULL);
			return SUCCESS;
		}
	}
	if (!fsf_req) {
		zfcp_dbf_scsi_devreset("reqf", sdev, tm_flags, NULL);
		return FAILED;
	}

	wait_for_completion(&fsf_req->completion);

	if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
		zfcp_dbf_scsi_devreset("fail", sdev, tm_flags, fsf_req);
		retval = FAILED;
	} else {
		zfcp_dbf_scsi_devreset("okay", sdev, tm_flags, fsf_req);
		zfcp_scsi_forget_cmnds(zfcp_sdev, tm_flags);
	}

	zfcp_fsf_req_free(fsf_req);
	return retval;
}

static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
{
	struct scsi_device *sdev = scpnt->device;

	return zfcp_scsi_task_mgmt_function(sdev, FCP_TMF_LUN_RESET);
}

static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
{
	struct scsi_target *starget = scsi_target(scpnt->device);
	struct fc_rport *rport = starget_to_rport(starget);
	struct Scsi_Host *shost = rport_to_shost(rport);
	struct scsi_device *sdev = NULL, *tmp_sdev;
	struct zfcp_adapter *adapter =
		(struct zfcp_adapter *)shost->hostdata[0];
	int ret;

	shost_for_each_device(tmp_sdev, shost) {
		if (tmp_sdev->id == starget->id) {
			sdev = tmp_sdev;
			break;
		}
	}
	if (!sdev) {
		ret = FAILED;
		zfcp_dbf_scsi_eh("tr_nosd", adapter, starget->id, ret);
		return ret;
	}

	ret = zfcp_scsi_task_mgmt_function(sdev, FCP_TMF_TGT_RESET);

	/* release reference from above shost_for_each_device */
	if (sdev)
		scsi_device_put(tmp_sdev);

	return ret;
}

static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
{
	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
	struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
	int ret = SUCCESS, fc_ret;

	zfcp_erp_adapter_reopen(adapter, 0, "schrh_1");
	zfcp_erp_wait(adapter);
	fc_ret = fc_block_scsi_eh(scpnt);
	if (fc_ret)
		ret = fc_ret;

	zfcp_dbf_scsi_eh("schrh_r", adapter, ~0, ret);
	return ret;
}

/**
 * zfcp_scsi_sysfs_host_reset() - Support scsi_host sysfs attribute host_reset.
 * @shost: Pointer to Scsi_Host to perform action on.
 * @reset_type: We support %SCSI_ADAPTER_RESET but not %SCSI_FIRMWARE_RESET.
 *
 * Return: 0 on %SCSI_ADAPTER_RESET, -%EOPNOTSUPP otherwise.
 *
 * This is similar to zfcp_sysfs_adapter_failed_store().
 */
static int zfcp_scsi_sysfs_host_reset(struct Scsi_Host *shost, int reset_type)
{
	struct zfcp_adapter *adapter =
		(struct zfcp_adapter *)shost->hostdata[0];
	int ret = 0;

	if (reset_type != SCSI_ADAPTER_RESET) {
		ret = -EOPNOTSUPP;
		zfcp_dbf_scsi_eh("scshr_n", adapter, ~0, ret);
		return ret;
	}

	zfcp_erp_adapter_reset_sync(adapter, "scshr_y");
	return ret;
}

struct scsi_transport_template *zfcp_scsi_transport_template;

static struct scsi_host_template zfcp_scsi_host_template = {
	.module			 = THIS_MODULE,
	.name			 = "zfcp",
	.queuecommand		 = zfcp_scsi_queuecommand,
	.eh_timed_out		 = fc_eh_timed_out,
	.eh_abort_handler	 = zfcp_scsi_eh_abort_handler,
	.eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
	.eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
	.eh_host_reset_handler	 = zfcp_scsi_eh_host_reset_handler,
	.slave_alloc		 = zfcp_scsi_slave_alloc,
	.slave_configure	 = zfcp_scsi_slave_configure,
	.slave_destroy		 = zfcp_scsi_slave_destroy,
	.change_queue_depth	 = scsi_change_queue_depth,
	.host_reset		 = zfcp_scsi_sysfs_host_reset,
	.proc_name		 = "zfcp",
	.can_queue		 = 4096,
	.this_id		 = -1,
	.sg_tablesize		 = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
				     * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2),
				   /* GCD, adjusted later */
	.max_sectors		 = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
				     * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2) * 8,
				   /* GCD, adjusted later */
	/* report size limit per scatter-gather segment */
	.max_segment_size	 = ZFCP_QDIO_SBALE_LEN,
	.dma_boundary		 = ZFCP_QDIO_SBALE_LEN - 1,
	.shost_attrs		 = zfcp_sysfs_shost_attrs,
	.sdev_attrs		 = zfcp_sysfs_sdev_attrs,
	.track_queue_depth	 = 1,
	.supported_mode		 = MODE_INITIATOR,
};

/**
 * zfcp_scsi_adapter_register - Register SCSI and FC host with SCSI midlayer
 * @adapter: The zfcp adapter to register with the SCSI midlayer
 */
int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter)
{
	struct ccw_dev_id dev_id;

	if (adapter->scsi_host)
		return 0;

	ccw_device_get_id(adapter->ccw_device, &dev_id);
	/* register adapter as SCSI host with mid layer of SCSI stack */
	adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template,
					     sizeof (struct zfcp_adapter *));
	if (!adapter->scsi_host) {
		dev_err(&adapter->ccw_device->dev,
			"Registering the FCP device with the "
			"SCSI stack failed\n");
		return -EIO;
	}

	/* tell the SCSI stack some characteristics of this adapter */
	adapter->scsi_host->max_id = 511;
	adapter->scsi_host->max_lun = 0xFFFFFFFF;
	adapter->scsi_host->max_channel = 0;
	adapter->scsi_host->unique_id = dev_id.devno;
	adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */
	adapter->scsi_host->transportt = zfcp_scsi_transport_template;

	adapter->scsi_host->hostdata[0] = (unsigned long) adapter;

	if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
		scsi_host_put(adapter->scsi_host);
		return -EIO;
	}

	return 0;
}

/**
 * zfcp_scsi_adapter_unregister - Unregister SCSI and FC host from SCSI midlayer
 * @adapter: The zfcp adapter to unregister.
 */
void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter)
{
	struct Scsi_Host *shost;
	struct zfcp_port *port;

	shost = adapter->scsi_host;
	if (!shost)
		return;

	read_lock_irq(&adapter->port_list_lock);
	list_for_each_entry(port, &adapter->port_list, list)
		port->rport = NULL;
	read_unlock_irq(&adapter->port_list_lock);

	fc_remove_host(shost);
	scsi_remove_host(shost);
	scsi_host_put(shost);
	adapter->scsi_host = NULL;
}

static struct fc_host_statistics*
zfcp_scsi_init_fc_host_stats(struct zfcp_adapter *adapter)
{
	struct fc_host_statistics *fc_stats;

	if (!adapter->fc_stats) {
		fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL);
		if (!fc_stats)
			return NULL;
		adapter->fc_stats = fc_stats; /* freed in adapter_release */
	}
	memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats));
	return adapter->fc_stats;
}

static void zfcp_scsi_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
					   struct fsf_qtcb_bottom_port *data,
					   struct fsf_qtcb_bottom_port *old)
{
	fc_stats->seconds_since_last_reset =
		data->seconds_since_last_reset - old->seconds_since_last_reset;
	fc_stats->tx_frames = data->tx_frames - old->tx_frames;
	fc_stats->tx_words = data->tx_words - old->tx_words;
	fc_stats->rx_frames = data->rx_frames - old->rx_frames;
	fc_stats->rx_words = data->rx_words - old->rx_words;
	fc_stats->lip_count = data->lip - old->lip;
	fc_stats->nos_count = data->nos - old->nos;
	fc_stats->error_frames = data->error_frames - old->error_frames;
	fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
	fc_stats->link_failure_count = data->link_failure - old->link_failure;
	fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
	fc_stats->loss_of_signal_count =
		data->loss_of_signal - old->loss_of_signal;
	fc_stats->prim_seq_protocol_err_count =
		data->psp_error_counts - old->psp_error_counts;
	fc_stats->invalid_tx_word_count =
		data->invalid_tx_words - old->invalid_tx_words;
	fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
	fc_stats->fcp_input_requests =
		data->input_requests - old->input_requests;
	fc_stats->fcp_output_requests =
		data->output_requests - old->output_requests;
	fc_stats->fcp_control_requests =
		data->control_requests - old->control_requests;
	fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
	fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
}

static void zfcp_scsi_set_fc_host_stats(struct fc_host_statistics *fc_stats,
					struct fsf_qtcb_bottom_port *data)
{
	fc_stats->seconds_since_last_reset = data->seconds_since_last_reset;
	fc_stats->tx_frames = data->tx_frames;
	fc_stats->tx_words = data->tx_words;
	fc_stats->rx_frames = data->rx_frames;
	fc_stats->rx_words = data->rx_words;
	fc_stats->lip_count = data->lip;
	fc_stats->nos_count = data->nos;
	fc_stats->error_frames = data->error_frames;
	fc_stats->dumped_frames = data->dumped_frames;
	fc_stats->link_failure_count = data->link_failure;
	fc_stats->loss_of_sync_count = data->loss_of_sync;
	fc_stats->loss_of_signal_count = data->loss_of_signal;
	fc_stats->prim_seq_protocol_err_count = data->psp_error_counts;
	fc_stats->invalid_tx_word_count = data->invalid_tx_words;
	fc_stats->invalid_crc_count = data->invalid_crcs;
	fc_stats->fcp_input_requests = data->input_requests;
	fc_stats->fcp_output_requests = data->output_requests;
	fc_stats->fcp_control_requests = data->control_requests;
	fc_stats->fcp_input_megabytes = data->input_mb;
	fc_stats->fcp_output_megabytes = data->output_mb;
}