zfcp_fsf.c 66.6 KB
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/*
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 * zfcp device driver
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 *
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 * Implementation of FSF commands.
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 *
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 * Copyright IBM Corporation 2002, 2010
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 */

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#define KMSG_COMPONENT "zfcp"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt

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#include <linux/blktrace_api.h>
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#include <linux/slab.h>
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#include <scsi/fc/fc_els.h>
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#include "zfcp_ext.h"
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#include "zfcp_fc.h"
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#include "zfcp_dbf.h"
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#include "zfcp_qdio.h"
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#include "zfcp_reqlist.h"
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struct kmem_cache *zfcp_fsf_qtcb_cache;

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static void zfcp_fsf_request_timeout_handler(unsigned long data)
{
	struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
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	zfcp_qdio_siosl(adapter);
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	zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
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				"fsrth_1");
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}

static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
				 unsigned long timeout)
{
	fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
	fsf_req->timer.data = (unsigned long) fsf_req->adapter;
	fsf_req->timer.expires = jiffies + timeout;
	add_timer(&fsf_req->timer);
}

static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
{
	BUG_ON(!fsf_req->erp_action);
	fsf_req->timer.function = zfcp_erp_timeout_handler;
	fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
	fsf_req->timer.expires = jiffies + 30 * HZ;
	add_timer(&fsf_req->timer);
}

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/* association between FSF command and FSF QTCB type */
static u32 fsf_qtcb_type[] = {
	[FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
	[FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
	[FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
	[FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
	[FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
	[FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
	[FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
	[FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
	[FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
	[FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
	[FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
	[FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
	[FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
};

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static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
{
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	dev_err(&req->adapter->ccw_device->dev, "FCP device not "
		"operational because of an unsupported FC class\n");
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	zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1");
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	req->status |= ZFCP_STATUS_FSFREQ_ERROR;
}

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/**
 * zfcp_fsf_req_free - free memory used by fsf request
 * @fsf_req: pointer to struct zfcp_fsf_req
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 */
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void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
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{
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	if (likely(req->pool)) {
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		if (likely(req->qtcb))
			mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
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		mempool_free(req, req->pool);
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		return;
	}

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	if (likely(req->qtcb))
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		kmem_cache_free(zfcp_fsf_qtcb_cache, req->qtcb);
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	kfree(req);
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}

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static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
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{
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	unsigned long flags;
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	struct fsf_status_read_buffer *sr_buf = req->data;
	struct zfcp_adapter *adapter = req->adapter;
	struct zfcp_port *port;
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	int d_id = ntoh24(sr_buf->d_id);
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	read_lock_irqsave(&adapter->port_list_lock, flags);
	list_for_each_entry(port, &adapter->port_list, list)
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		if (port->d_id == d_id) {
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			zfcp_erp_port_reopen(port, 0, "fssrpc1");
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			break;
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		}
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	read_unlock_irqrestore(&adapter->port_list_lock, flags);
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}

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static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req,
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					 struct fsf_link_down_info *link_down)
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{
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	struct zfcp_adapter *adapter = req->adapter;
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	if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
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		return;

	atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
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	zfcp_scsi_schedule_rports_block(adapter);
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	if (!link_down)
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		goto out;
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	switch (link_down->error_code) {
	case FSF_PSQ_LINK_NO_LIGHT:
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		dev_warn(&req->adapter->ccw_device->dev,
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			 "There is no light signal from the local "
			 "fibre channel cable\n");
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		break;
	case FSF_PSQ_LINK_WRAP_PLUG:
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		dev_warn(&req->adapter->ccw_device->dev,
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			 "There is a wrap plug instead of a fibre "
			 "channel cable\n");
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		break;
	case FSF_PSQ_LINK_NO_FCP:
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		dev_warn(&req->adapter->ccw_device->dev,
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			 "The adjacent fibre channel node does not "
			 "support FCP\n");
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		break;
	case FSF_PSQ_LINK_FIRMWARE_UPDATE:
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		dev_warn(&req->adapter->ccw_device->dev,
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			 "The FCP device is suspended because of a "
			 "firmware update\n");
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		break;
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	case FSF_PSQ_LINK_INVALID_WWPN:
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		dev_warn(&req->adapter->ccw_device->dev,
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			 "The FCP device detected a WWPN that is "
			 "duplicate or not valid\n");
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		break;
	case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
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		dev_warn(&req->adapter->ccw_device->dev,
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			 "The fibre channel fabric does not support NPIV\n");
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		break;
	case FSF_PSQ_LINK_NO_FCP_RESOURCES:
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		dev_warn(&req->adapter->ccw_device->dev,
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			 "The FCP adapter cannot support more NPIV ports\n");
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		break;
	case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
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		dev_warn(&req->adapter->ccw_device->dev,
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			 "The adjacent switch cannot support "
			 "more NPIV ports\n");
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		break;
	case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
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		dev_warn(&req->adapter->ccw_device->dev,
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			 "The FCP adapter could not log in to the "
			 "fibre channel fabric\n");
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		break;
	case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
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		dev_warn(&req->adapter->ccw_device->dev,
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			 "The WWPN assignment file on the FCP adapter "
			 "has been damaged\n");
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		break;
	case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
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		dev_warn(&req->adapter->ccw_device->dev,
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			 "The mode table on the FCP adapter "
			 "has been damaged\n");
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		break;
	case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
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		dev_warn(&req->adapter->ccw_device->dev,
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			 "All NPIV ports on the FCP adapter have "
			 "been assigned\n");
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		break;
	default:
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		dev_warn(&req->adapter->ccw_device->dev,
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			 "The link between the FCP adapter and "
			 "the FC fabric is down\n");
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	}
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out:
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	zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
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}

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static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
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{
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	struct fsf_status_read_buffer *sr_buf = req->data;
	struct fsf_link_down_info *ldi =
		(struct fsf_link_down_info *) &sr_buf->payload;
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	switch (sr_buf->status_subtype) {
	case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
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		zfcp_fsf_link_down_info_eval(req, ldi);
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		break;
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	case FSF_STATUS_READ_SUB_FDISC_FAILED:
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		zfcp_fsf_link_down_info_eval(req, ldi);
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		break;
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	case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
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		zfcp_fsf_link_down_info_eval(req, NULL);
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	};
}
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static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
{
	struct zfcp_adapter *adapter = req->adapter;
	struct fsf_status_read_buffer *sr_buf = req->data;
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	if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
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		zfcp_dbf_hba_fsf_uss("fssrh_1", req);
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		mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
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		zfcp_fsf_req_free(req);
		return;
	}
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	zfcp_dbf_hba_fsf_uss("fssrh_2", req);
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	switch (sr_buf->status_type) {
	case FSF_STATUS_READ_PORT_CLOSED:
		zfcp_fsf_status_read_port_closed(req);
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		break;
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	case FSF_STATUS_READ_INCOMING_ELS:
		zfcp_fc_incoming_els(req);
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		break;
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	case FSF_STATUS_READ_SENSE_DATA_AVAIL:
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		break;
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	case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
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		dev_warn(&adapter->ccw_device->dev,
			 "The error threshold for checksum statistics "
			 "has been exceeded\n");
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		zfcp_dbf_hba_bit_err("fssrh_3", req);
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		break;
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	case FSF_STATUS_READ_LINK_DOWN:
		zfcp_fsf_status_read_link_down(req);
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		zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKDOWN, 0);
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		break;
	case FSF_STATUS_READ_LINK_UP:
		dev_info(&adapter->ccw_device->dev,
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			 "The local link has been restored\n");
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		/* All ports should be marked as ready to run again */
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		zfcp_erp_set_adapter_status(adapter,
					    ZFCP_STATUS_COMMON_RUNNING);
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		zfcp_erp_adapter_reopen(adapter,
					ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
					ZFCP_STATUS_COMMON_ERP_FAILED,
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					"fssrh_2");
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		zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKUP, 0);

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		break;
	case FSF_STATUS_READ_NOTIFICATION_LOST:
		if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
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			zfcp_cfdc_adapter_access_changed(adapter);
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		if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
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			queue_work(adapter->work_queue, &adapter->scan_work);
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		break;
	case FSF_STATUS_READ_CFDC_UPDATED:
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		zfcp_cfdc_adapter_access_changed(adapter);
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		break;
	case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
		adapter->adapter_features = sr_buf->payload.word[0];
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		break;
	}

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	mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
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	zfcp_fsf_req_free(req);
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	atomic_inc(&adapter->stat_miss);
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	queue_work(adapter->work_queue, &adapter->stat_work);
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}
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static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
{
	switch (req->qtcb->header.fsf_status_qual.word[0]) {
	case FSF_SQ_FCP_RSP_AVAILABLE:
	case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
	case FSF_SQ_NO_RETRY_POSSIBLE:
	case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
		return;
	case FSF_SQ_COMMAND_ABORTED:
		break;
	case FSF_SQ_NO_RECOM:
		dev_err(&req->adapter->ccw_device->dev,
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			"The FCP adapter reported a problem "
			"that cannot be recovered\n");
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		zfcp_qdio_siosl(req->adapter);
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		zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1");
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		break;
	}
	/* all non-return stats set FSFREQ_ERROR*/
	req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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}

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static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
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{
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	if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
		return;
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	switch (req->qtcb->header.fsf_status) {
	case FSF_UNKNOWN_COMMAND:
		dev_err(&req->adapter->ccw_device->dev,
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			"The FCP adapter does not recognize the command 0x%x\n",
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			req->qtcb->header.fsf_command);
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		zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1");
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		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
		break;
	case FSF_ADAPTER_STATUS_AVAILABLE:
		zfcp_fsf_fsfstatus_qual_eval(req);
		break;
	}
}
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static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
{
	struct zfcp_adapter *adapter = req->adapter;
	struct fsf_qtcb *qtcb = req->qtcb;
	union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
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	zfcp_dbf_hba_fsf_response(req);
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	if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
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		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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		return;
	}
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	switch (qtcb->prefix.prot_status) {
	case FSF_PROT_GOOD:
	case FSF_PROT_FSF_STATUS_PRESENTED:
		return;
	case FSF_PROT_QTCB_VERSION_ERROR:
		dev_err(&adapter->ccw_device->dev,
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			"QTCB version 0x%x not supported by FCP adapter "
			"(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
			psq->word[0], psq->word[1]);
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		zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1");
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		break;
	case FSF_PROT_ERROR_STATE:
	case FSF_PROT_SEQ_NUMB_ERROR:
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		zfcp_erp_adapter_reopen(adapter, 0, "fspse_2");
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		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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		break;
	case FSF_PROT_UNSUPP_QTCB_TYPE:
		dev_err(&adapter->ccw_device->dev,
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			"The QTCB type is not supported by the FCP adapter\n");
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		zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3");
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		break;
	case FSF_PROT_HOST_CONNECTION_INITIALIZING:
		atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
				&adapter->status);
		break;
	case FSF_PROT_DUPLICATE_REQUEST_ID:
		dev_err(&adapter->ccw_device->dev,
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			"0x%Lx is an ambiguous request identifier\n",
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			(unsigned long long)qtcb->bottom.support.req_handle);
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		zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4");
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		break;
	case FSF_PROT_LINK_DOWN:
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		zfcp_fsf_link_down_info_eval(req, &psq->link_down_info);
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		/* go through reopen to flush pending requests */
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		zfcp_erp_adapter_reopen(adapter, 0, "fspse_6");
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		break;
	case FSF_PROT_REEST_QUEUE:
		/* All ports should be marked as ready to run again */
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		zfcp_erp_set_adapter_status(adapter,
					    ZFCP_STATUS_COMMON_RUNNING);
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		zfcp_erp_adapter_reopen(adapter,
					ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
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					ZFCP_STATUS_COMMON_ERP_FAILED,
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					"fspse_8");
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		break;
	default:
		dev_err(&adapter->ccw_device->dev,
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			"0x%x is not a valid transfer protocol status\n",
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			qtcb->prefix.prot_status);
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		zfcp_qdio_siosl(adapter);
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		zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9");
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	}
	req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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}

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/**
 * zfcp_fsf_req_complete - process completion of a FSF request
 * @fsf_req: The FSF request that has been completed.
 *
 * When a request has been completed either from the FCP adapter,
 * or it has been dismissed due to a queue shutdown, this function
 * is called to process the completion status and trigger further
 * events related to the FSF request.
 */
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static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
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{
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	if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
		zfcp_fsf_status_read_handler(req);
		return;
	}
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	del_timer(&req->timer);
	zfcp_fsf_protstatus_eval(req);
	zfcp_fsf_fsfstatus_eval(req);
	req->handler(req);
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	if (req->erp_action)
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		zfcp_erp_notify(req->erp_action, 0);
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	if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
		zfcp_fsf_req_free(req);
	else
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		complete(&req->completion);
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}
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/**
 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
 * @adapter: pointer to struct zfcp_adapter
 *
 * Never ever call this without shutting down the adapter first.
 * Otherwise the adapter would continue using and corrupting s390 storage.
 * Included BUG_ON() call to ensure this is done.
 * ERP is supposed to be the only user of this function.
 */
void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
{
	struct zfcp_fsf_req *req, *tmp;
	LIST_HEAD(remove_queue);

	BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
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	zfcp_reqlist_move(adapter->req_list, &remove_queue);
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	list_for_each_entry_safe(req, tmp, &remove_queue, list) {
		list_del(&req->list);
		req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
		zfcp_fsf_req_complete(req);
	}
}

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static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
{
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	struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
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	struct zfcp_adapter *adapter = req->adapter;
	struct Scsi_Host *shost = adapter->scsi_host;
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	struct fc_els_flogi *nsp, *plogi;
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	/* adjust pointers for missing command code */
	nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
					- sizeof(u32));
	plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
					- sizeof(u32));
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	if (req->data)
		memcpy(req->data, bottom, sizeof(*bottom));

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	fc_host_port_name(shost) = nsp->fl_wwpn;
	fc_host_node_name(shost) = nsp->fl_wwnn;
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	fc_host_port_id(shost) = ntoh24(bottom->s_id);
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	fc_host_speed(shost) = bottom->fc_link_speed;
	fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;

	adapter->hydra_version = bottom->adapter_type;
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	adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
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	adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
					 (u16)FSF_STATUS_READS_RECOM);
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	if (fc_host_permanent_port_name(shost) == -1)
		fc_host_permanent_port_name(shost) = fc_host_port_name(shost);

	switch (bottom->fc_topology) {
	case FSF_TOPO_P2P:
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		adapter->peer_d_id = ntoh24(bottom->peer_d_id);
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		adapter->peer_wwpn = plogi->fl_wwpn;
		adapter->peer_wwnn = plogi->fl_wwnn;
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		fc_host_port_type(shost) = FC_PORTTYPE_PTP;
		break;
	case FSF_TOPO_FABRIC:
		fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
		break;
	case FSF_TOPO_AL:
		fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
482
		/* fall through */
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	default:
		dev_err(&adapter->ccw_device->dev,
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			"Unknown or unsupported arbitrated loop "
			"fibre channel topology detected\n");
487
		zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
488
		return -EIO;
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	}
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	zfcp_scsi_set_prot(adapter);

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	return 0;
}

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static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
497 498
{
	struct zfcp_adapter *adapter = req->adapter;
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	struct fsf_qtcb *qtcb = req->qtcb;
	struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
	struct Scsi_Host *shost = adapter->scsi_host;
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	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
		return;
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	adapter->fsf_lic_version = bottom->lic_version;
	adapter->adapter_features = bottom->adapter_features;
	adapter->connection_features = bottom->connection_features;
	adapter->peer_wwpn = 0;
	adapter->peer_wwnn = 0;
	adapter->peer_d_id = 0;
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	switch (qtcb->header.fsf_status) {
	case FSF_GOOD:
		if (zfcp_fsf_exchange_config_evaluate(req))
			return;
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		if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
			dev_err(&adapter->ccw_device->dev,
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				"FCP adapter maximum QTCB size (%d bytes) "
				"is too small\n",
				bottom->max_qtcb_size);
523
			zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
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			return;
		}
		atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
				&adapter->status);
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		break;
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	case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
		fc_host_node_name(shost) = 0;
		fc_host_port_name(shost) = 0;
		fc_host_port_id(shost) = 0;
		fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
		fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
		adapter->hydra_version = 0;
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		zfcp_fsf_link_down_info_eval(req,
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			&qtcb->header.fsf_status_qual.link_down_info);
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		break;
540
	default:
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		zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
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		return;
	}
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	if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
		adapter->hardware_version = bottom->hardware_version;
		memcpy(fc_host_serial_number(shost), bottom->serial_number,
		       min(FC_SERIAL_NUMBER_SIZE, 17));
		EBCASC(fc_host_serial_number(shost),
		       min(FC_SERIAL_NUMBER_SIZE, 17));
	}
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	if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
		dev_err(&adapter->ccw_device->dev,
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			"The FCP adapter only supports newer "
			"control block versions\n");
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		zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
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		return;
	}
	if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
		dev_err(&adapter->ccw_device->dev,
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			"The FCP adapter only supports older "
			"control block versions\n");
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		zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
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	}
}
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static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
{
	struct zfcp_adapter *adapter = req->adapter;
	struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
	struct Scsi_Host *shost = adapter->scsi_host;
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	if (req->data)
		memcpy(req->data, bottom, sizeof(*bottom));
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577
	if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
578
		fc_host_permanent_port_name(shost) = bottom->wwpn;
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		fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
	} else
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		fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
	fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
	fc_host_supported_speeds(shost) = bottom->supported_speed;
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	memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
	       FC_FC4_LIST_SIZE);
	memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
	       FC_FC4_LIST_SIZE);
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}
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static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
{
	struct fsf_qtcb *qtcb = req->qtcb;

	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
		return;

	switch (qtcb->header.fsf_status) {
	case FSF_GOOD:
		zfcp_fsf_exchange_port_evaluate(req);
		break;
	case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
		zfcp_fsf_exchange_port_evaluate(req);
603
		zfcp_fsf_link_down_info_eval(req,
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			&qtcb->header.fsf_status_qual.link_down_info);
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		break;
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	}
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}
608

609
static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
610 611
{
	struct zfcp_fsf_req *req;
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	if (likely(pool))
		req = mempool_alloc(pool, GFP_ATOMIC);
	else
		req = kmalloc(sizeof(*req), GFP_ATOMIC);

	if (unlikely(!req))
619
		return NULL;
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621
	memset(req, 0, sizeof(*req));
622
	req->pool = pool;
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	return req;
}

626
static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
627
{
628
	struct fsf_qtcb *qtcb;
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	if (likely(pool))
		qtcb = mempool_alloc(pool, GFP_ATOMIC);
	else
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		qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
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	if (unlikely(!qtcb))
		return NULL;

	memset(qtcb, 0, sizeof(*qtcb));
639
	return qtcb;
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}

642
static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
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						u32 fsf_cmd, u32 sbtype,
						mempool_t *pool)
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{
646
	struct zfcp_adapter *adapter = qdio->adapter;
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	struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
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649
	if (unlikely(!req))
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		return ERR_PTR(-ENOMEM);
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	if (adapter->req_no == 0)
		adapter->req_no++;
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	INIT_LIST_HEAD(&req->list);
	init_timer(&req->timer);
657
	init_completion(&req->completion);
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	req->adapter = adapter;
	req->fsf_command = fsf_cmd;
661
	req->req_id = adapter->req_no;
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	if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
		if (likely(pool))
			req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
		else
			req->qtcb = zfcp_qtcb_alloc(NULL);

		if (unlikely(!req->qtcb)) {
			zfcp_fsf_req_free(req);
			return ERR_PTR(-ENOMEM);
		}

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		req->seq_no = adapter->fsf_req_seq_no;
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		req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
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		req->qtcb->prefix.req_id = req->req_id;
		req->qtcb->prefix.ulp_info = 26;
		req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
		req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
		req->qtcb->header.req_handle = req->req_id;
		req->qtcb->header.fsf_command = req->fsf_command;
	}

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	zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
			   req->qtcb, sizeof(struct fsf_qtcb));

687
	return req;
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}

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static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
{
	struct zfcp_adapter *adapter = req->adapter;
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	struct zfcp_qdio *qdio = adapter->qdio;
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	int with_qtcb = (req->qtcb != NULL);
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	int req_id = req->req_id;
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697
	zfcp_reqlist_add(adapter->req_list, req);
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699
	req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
700
	req->issued = get_clock();
701
	if (zfcp_qdio_send(qdio, &req->qdio_req)) {
702
		del_timer(&req->timer);
703
		/* lookup request again, list might have changed */
704
		zfcp_reqlist_find_rm(adapter->req_list, req_id);
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		zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
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		return -EIO;
	}

	/* Don't increase for unsolicited status */
710
	if (with_qtcb)
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		adapter->fsf_req_seq_no++;
712
	adapter->req_no++;
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	return 0;
}

/**
 * zfcp_fsf_status_read - send status read request
 * @adapter: pointer to struct zfcp_adapter
 * @req_flags: request flags
 * Returns: 0 on success, ERROR otherwise
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 */
723
int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
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{
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	struct zfcp_adapter *adapter = qdio->adapter;
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	struct zfcp_fsf_req *req;
	struct fsf_status_read_buffer *sr_buf;
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	struct page *page;
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	int retval = -EIO;
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731
	spin_lock_irq(&qdio->req_q_lock);
732
	if (zfcp_qdio_sbal_get(qdio))
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		goto out;

735
	req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS, 0,
736
				  adapter->pool.status_read_req);
737
	if (IS_ERR(req)) {
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		retval = PTR_ERR(req);
		goto out;
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	}

742 743
	page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
	if (!page) {
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		retval = -ENOMEM;
		goto failed_buf;
	}
747
	sr_buf = page_address(page);
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	memset(sr_buf, 0, sizeof(*sr_buf));
	req->data = sr_buf;
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	zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
	zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
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	retval = zfcp_fsf_req_send(req);
	if (retval)
		goto failed_req_send;
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	goto out;

failed_req_send:
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	req->data = NULL;
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	mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
763
failed_buf:
764
	zfcp_dbf_hba_fsf_uss("fssr__1", req);
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	zfcp_fsf_req_free(req);
out:
767
	spin_unlock_irq(&qdio->req_q_lock);
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	return retval;
}

static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
{
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	struct scsi_device *sdev = req->data;
	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
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	union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;

	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
		return;

	switch (req->qtcb->header.fsf_status) {
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	case FSF_PORT_HANDLE_NOT_VALID:
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		if (fsq->word[0] == fsq->word[1]) {
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			zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
784
						"fsafch1");
785
			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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		}
		break;
	case FSF_LUN_HANDLE_NOT_VALID:
789
		if (fsq->word[0] == fsq->word[1]) {
790
			zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
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			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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		}
		break;
	case FSF_FCP_COMMAND_DOES_NOT_EXIST:
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		req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
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		break;
	case FSF_PORT_BOXED:
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		zfcp_erp_set_port_status(zfcp_sdev->port,
					 ZFCP_STATUS_COMMON_ACCESS_BOXED);
		zfcp_erp_port_reopen(zfcp_sdev->port,
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				     ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
802
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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		break;
	case FSF_LUN_BOXED:
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		zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
		zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
807
				    "fsafch4");
808
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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                break;
	case FSF_ADAPTER_STATUS_AVAILABLE:
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		switch (fsq->word[0]) {
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		case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
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			zfcp_fc_test_link(zfcp_sdev->port);
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			/* fall through */
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		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
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			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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			break;
		}
		break;
	case FSF_GOOD:
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		req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
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		break;
	}
}

/**
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 * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
 * @scmnd: The SCSI command to abort
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 * Returns: pointer to struct zfcp_fsf_req
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 */

832
struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
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{
834
	struct zfcp_fsf_req *req = NULL;
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	struct scsi_device *sdev = scmnd->device;
	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
	struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
	unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
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840
	spin_lock_irq(&qdio->req_q_lock);
841
	if (zfcp_qdio_sbal_get(qdio))
842
		goto out;
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	req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
844
				  SBAL_FLAGS0_TYPE_READ,
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				  qdio->adapter->pool.scsi_abort);
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	if (IS_ERR(req)) {
		req = NULL;
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		goto out;
849
	}
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851
	if (unlikely(!(atomic_read(&zfcp_sdev->status) &
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		       ZFCP_STATUS_COMMON_UNBLOCKED)))
		goto out_error_free;
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855
	zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
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	req->data = sdev;
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	req->handler = zfcp_fsf_abort_fcp_command_handler;
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	req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
	req->qtcb->header.port_handle = zfcp_sdev->port->handle;
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	req->qtcb->bottom.support.req_handle = (u64) old_req_id;

	zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
	if (!zfcp_fsf_req_send(req))
		goto out;

out_error_free:
	zfcp_fsf_req_free(req);
	req = NULL;
out:
871
	spin_unlock_irq(&qdio->req_q_lock);
872
	return req;
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}

875
static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
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{
877
	struct zfcp_adapter *adapter = req->adapter;
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	struct zfcp_fsf_ct_els *ct = req->data;
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	struct fsf_qtcb_header *header = &req->qtcb->header;
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881
	ct->status = -EINVAL;
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883
	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
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		goto skip_fsfstatus;

	switch (header->fsf_status) {
        case FSF_GOOD:
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		zfcp_dbf_san_res("fsscth1", req);
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		ct->status = 0;
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		break;
        case FSF_SERVICE_CLASS_NOT_SUPPORTED:
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		zfcp_fsf_class_not_supp(req);
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		break;
        case FSF_ADAPTER_STATUS_AVAILABLE:
                switch (header->fsf_status_qual.word[0]){
                case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
                case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
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			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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			break;
                }
                break;
	case FSF_ACCESS_DENIED:
		break;
        case FSF_PORT_BOXED:
905
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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		break;
907
	case FSF_PORT_HANDLE_NOT_VALID:
908
		zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
909
		/* fall through */
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	case FSF_GENERIC_COMMAND_REJECTED:
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	case FSF_PAYLOAD_SIZE_MISMATCH:
	case FSF_REQUEST_SIZE_TOO_LARGE:
	case FSF_RESPONSE_SIZE_TOO_LARGE:
	case FSF_SBAL_MISMATCH:
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		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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		break;
	}

skip_fsfstatus:
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	if (ct->handler)
		ct->handler(ct->handler_data);
922
}
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static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
					    struct zfcp_qdio_req *q_req,
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					    struct scatterlist *sg_req,
					    struct scatterlist *sg_resp)
{
929 930 931
	zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
	zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
	zfcp_qdio_set_sbale_last(qdio, q_req);
932 933
}

934 935
static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
				       struct scatterlist *sg_req,
936
				       struct scatterlist *sg_resp)
937
{
938 939
	struct zfcp_adapter *adapter = req->adapter;
	u32 feat = adapter->adapter_features;
940 941
	int bytes;

942
	if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
943 944
		if (!zfcp_qdio_sg_one_sbale(sg_req) ||
		    !zfcp_qdio_sg_one_sbale(sg_resp))
945 946
			return -EOPNOTSUPP;

947 948
		zfcp_fsf_setup_ct_els_unchained(adapter->qdio, &req->qdio_req,
						sg_req, sg_resp);
949 950 951 952
		return 0;
	}

	/* use single, unchained SBAL if it can hold the request */
953
	if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
954 955
		zfcp_fsf_setup_ct_els_unchained(adapter->qdio, &req->qdio_req,
						sg_req, sg_resp);
956 957 958
		return 0;
	}

959
	bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req, sg_req);
960
	if (bytes <= 0)
961
		return -EIO;
962
	zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
963
	req->qtcb->bottom.support.req_buf_length = bytes;
964
	zfcp_qdio_skip_to_last_sbale(&req->qdio_req);
965

966
	bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req,
967
					sg_resp);
968
	req->qtcb->bottom.support.resp_buf_length = bytes;
969
	if (bytes <= 0)
970
		return -EIO;
971
	zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
972

973 974 975 976 977 978
	return 0;
}

static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
				 struct scatterlist *sg_req,
				 struct scatterlist *sg_resp,
979
				 unsigned int timeout)
980 981 982
{
	int ret;

983
	ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
984 985 986
	if (ret)
		return ret;

987
	/* common settings for ct/gs and els requests */
988 989
	if (timeout > 255)
		timeout = 255; /* max value accepted by hardware */
990
	req->qtcb->bottom.support.service_class = FSF_CLASS_3;
991 992
	req->qtcb->bottom.support.timeout = timeout;
	zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
993 994

	return 0;
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}

/**
998 999 1000
 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
 * @ct: pointer to struct zfcp_send_ct with data for request
 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
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1001
 */
1002
int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1003 1004
		     struct zfcp_fsf_ct_els *ct, mempool_t *pool,
		     unsigned int timeout)
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1005
{
1006
	struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1007 1008
	struct zfcp_fsf_req *req;
	int ret = -EIO;
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1009

1010
	spin_lock_irq(&qdio->req_q_lock);
1011
	if (zfcp_qdio_sbal_get(qdio))
1012
		goto out;
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1013

1014 1015
	req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
				  SBAL_FLAGS0_TYPE_WRITE_READ, pool);
1016

1017
	if (IS_ERR(req)) {
1018 1019
		ret = PTR_ERR(req);
		goto out;
1020 1021
	}

1022
	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1023
	ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1024
	if (ret)
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1025 1026
		goto failed_send;

1027
	req->handler = zfcp_fsf_send_ct_handler;
1028
	req->qtcb->header.port_handle = wka_port->handle;
1029 1030
	req->data = ct;

1031
	zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
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1032

1033 1034 1035
	ret = zfcp_fsf_req_send(req);
	if (ret)
		goto failed_send;
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1036

1037
	goto out;
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1038

1039 1040 1041
failed_send:
	zfcp_fsf_req_free(req);
out:
1042
	spin_unlock_irq(&qdio->req_q_lock);
1043
	return ret;
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1044 1045
}

1046
static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
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1047
{
1048
	struct zfcp_fsf_ct_els *send_els = req->data;
1049 1050
	struct zfcp_port *port = send_els->port;
	struct fsf_qtcb_header *header = &req->qtcb->header;
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1051

1052
	send_els->status = -EINVAL;
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1053

1054
	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
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1055 1056 1057 1058
		goto skip_fsfstatus;

	switch (header->fsf_status) {
	case FSF_GOOD:
1059
		zfcp_dbf_san_res("fsselh1", req);
1060
		send_els->status = 0;
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1061 1062
		break;
	case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1063
		zfcp_fsf_class_not_supp(req);
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1064 1065 1066 1067 1068 1069
		break;
	case FSF_ADAPTER_STATUS_AVAILABLE:
		switch (header->fsf_status_qual.word[0]){
		case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
		case FSF_SQ_RETRY_IF_POSSIBLE:
1070
			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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1071 1072 1073 1074 1075 1076 1077 1078 1079
			break;
		}
		break;
	case FSF_ELS_COMMAND_REJECTED:
	case FSF_PAYLOAD_SIZE_MISMATCH:
	case FSF_REQUEST_SIZE_TOO_LARGE:
	case FSF_RESPONSE_SIZE_TOO_LARGE:
		break;
	case FSF_ACCESS_DENIED:
1080 1081 1082 1083
		if (port) {
			zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
		}
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1084
		break;
1085 1086 1087
	case FSF_SBAL_MISMATCH:
		/* should never occure, avoided in zfcp_fsf_send_els */
		/* fall through */
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1088
	default:
1089
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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1090 1091 1092
		break;
	}
skip_fsfstatus:
1093
	if (send_els->handler)
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1094
		send_els->handler(send_els->handler_data);
1095
}
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1096

1097 1098 1099 1100
/**
 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
 * @els: pointer to struct zfcp_send_els with data for the command
 */
1101
int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1102
		      struct zfcp_fsf_ct_els *els, unsigned int timeout)
1103 1104
{
	struct zfcp_fsf_req *req;
1105
	struct zfcp_qdio *qdio = adapter->qdio;
1106 1107
	int ret = -EIO;

1108
	spin_lock_irq(&qdio->req_q_lock);
1109
	if (zfcp_qdio_sbal_get(qdio))
1110
		goto out;
1111

1112 1113
	req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
				  SBAL_FLAGS0_TYPE_WRITE_READ, NULL);
1114

1115
	if (IS_ERR(req)) {
1116 1117 1118 1119
		ret = PTR_ERR(req);
		goto out;
	}

1120
	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1121 1122 1123 1124

	zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);

	ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1125

1126 1127 1128
	if (ret)
		goto failed_send;

1129
	hton24(req->qtcb->bottom.support.d_id, d_id);
1130 1131 1132
	req->handler = zfcp_fsf_send_els_handler;
	req->data = els;

1133
	zfcp_dbf_san_req("fssels1", req, d_id);
1134 1135 1136 1137 1138 1139 1140 1141 1142 1143

	ret = zfcp_fsf_req_send(req);
	if (ret)
		goto failed_send;

	goto out;

failed_send:
	zfcp_fsf_req_free(req);
out:
1144
	spin_unlock_irq(&qdio->req_q_lock);
1145
	return ret;
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1146 1147
}

1148
int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
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1149
{
1150
	struct zfcp_fsf_req *req;
1151
	struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1152 1153
	int retval = -EIO;

1154
	spin_lock_irq(&qdio->req_q_lock);
1155
	if (zfcp_qdio_sbal_get(qdio))
1156
		goto out;
1157

1158
	req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1159
				  SBAL_FLAGS0_TYPE_READ,
1160
				  qdio->adapter->pool.erp_req);
1161

1162
	if (IS_ERR(req)) {
1163 1164
		retval = PTR_ERR(req);
		goto out;
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1165 1166
	}

1167
	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1168
	zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
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1169

1170
	req->qtcb->bottom.config.feature_selection =
1171 1172
			FSF_FEATURE_CFDC |
			FSF_FEATURE_LUN_SHARING |
1173
			FSF_FEATURE_NOTIFICATION_LOST |
1174
			FSF_FEATURE_UPDATE_ALERT;
1175 1176
	req->erp_action = erp_action;
	req->handler = zfcp_fsf_exchange_config_data_handler;
1177
	erp_action->fsf_req_id = req->req_id;
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1178

1179
	zfcp_fsf_start_erp_timer(req);
1180
	retval = zfcp_fsf_req_send(req);
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1181
	if (retval) {
1182
		zfcp_fsf_req_free(req);
1183
		erp_action->fsf_req_id = 0;
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1184
	}
1185
out:
1186
	spin_unlock_irq(&qdio->req_q_lock);
1187 1188
	return retval;
}
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1189

1190
int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1191
				       struct fsf_qtcb_bottom_config *data)
1192
{
1193 1194 1195
	struct zfcp_fsf_req *req = NULL;
	int retval = -EIO;

1196
	spin_lock_irq(&qdio->req_q_lock);
1197
	if (zfcp_qdio_sbal_get(qdio))
1198
		goto out_unlock;
1199

1200 1201
	req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
				  SBAL_FLAGS0_TYPE_READ, NULL);
1202

1203
	if (IS_ERR(req)) {
1204
		retval = PTR_ERR(req);
1205
		goto out_unlock;
1206 1207
	}

1208
	zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1209
	req->handler = zfcp_fsf_exchange_config_data_handler;
1210

1211
	req->qtcb->bottom.config.feature_selection =
1212 1213 1214 1215 1216 1217
			FSF_FEATURE_CFDC |
			FSF_FEATURE_LUN_SHARING |
			FSF_FEATURE_NOTIFICATION_LOST |
			FSF_FEATURE_UPDATE_ALERT;

	if (data)
1218
		req->data = data;
1219

1220 1221
	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
	retval = zfcp_fsf_req_send(req);
1222
	spin_unlock_irq(&qdio->req_q_lock);
1223
	if (!retval)
1224
		wait_for_completion(&req->completion);
1225

1226
	zfcp_fsf_req_free(req);
1227
	return retval;
1228

1229
out_unlock:
1230
	spin_unlock_irq(&qdio->req_q_lock);
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	return retval;
}

/**
 * zfcp_fsf_exchange_port_data - request information about local port
1236
 * @erp_action: ERP action for the adapter for which port data is requested
1237
 * Returns: 0 on success, error otherwise
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1238
 */
1239
int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
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1240
{
1241
	struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1242 1243
	struct zfcp_fsf_req *req;
	int retval = -EIO;
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1244

1245
	if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1246
		return -EOPNOTSUPP;
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1247

1248
	spin_lock_irq(&qdio->req_q_lock);
1249
	if (zfcp_qdio_sbal_get(qdio))
1250
		goto out;
1251

1252
	req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1253
				  SBAL_FLAGS0_TYPE_READ,
1254
				  qdio->adapter->pool.erp_req);
1255

1256
	if (IS_ERR(req)) {
1257 1258
		retval = PTR_ERR(req);
		goto out;
1259 1260
	}

1261
	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1262
	zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
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1263

1264 1265
	req->handler = zfcp_fsf_exchange_port_data_handler;
	req->erp_action = erp_action;
1266
	erp_action->fsf_req_id = req->req_id;
1267

1268
	zfcp_fsf_start_erp_timer(req);
1269
	retval = zfcp_fsf_req_send(req);
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1270
	if (retval) {
1271
		zfcp_fsf_req_free(req);
1272
		erp_action->fsf_req_id = 0;
1273
	}
1274
out:
1275
	spin_unlock_irq(&qdio->req_q_lock);
1276 1277 1278 1279 1280
	return retval;
}

/**
 * zfcp_fsf_exchange_port_data_sync - request information about local port
1281
 * @qdio: pointer to struct zfcp_qdio
1282 1283
 * @data: pointer to struct fsf_qtcb_bottom_port
 * Returns: 0 on success, error otherwise
1284
 */
1285
int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1286
				     struct fsf_qtcb_bottom_port *data)
1287
{
1288 1289
	struct zfcp_fsf_req *req = NULL;
	int retval = -EIO;
1290

1291
	if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1292 1293
		return -EOPNOTSUPP;

1294
	spin_lock_irq(&qdio->req_q_lock);
1295
	if (zfcp_qdio_sbal_get(qdio))
1296
		goto out_unlock;
1297

1298 1299
	req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
				  SBAL_FLAGS0_TYPE_READ, NULL);
1300

1301
	if (IS_ERR(req)) {
1302
		retval = PTR_ERR(req);
1303
		goto out_unlock;
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1304 1305
	}

1306
	if (data)
1307
		req->data = data;
1308

1309
	zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1310

1311 1312 1313
	req->handler = zfcp_fsf_exchange_port_data_handler;
	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
	retval = zfcp_fsf_req_send(req);
1314
	spin_unlock_irq(&qdio->req_q_lock);
1315

1316
	if (!retval)
1317 1318
		wait_for_completion(&req->completion);

1319
	zfcp_fsf_req_free(req);
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1320 1321

	return retval;
1322 1323

out_unlock:
1324
	spin_unlock_irq(&qdio->req_q_lock);
1325
	return retval;
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1326 1327
}

1328
static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
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1329
{
1330 1331
	struct zfcp_port *port = req->data;
	struct fsf_qtcb_header *header = &req->qtcb->header;
1332
	struct fc_els_flogi *plogi;
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1333

1334
	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1335
		goto out;
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1336 1337 1338 1339 1340

	switch (header->fsf_status) {
	case FSF_PORT_ALREADY_OPEN:
		break;
	case FSF_ACCESS_DENIED:
1341 1342
		zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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1343 1344
		break;
	case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1345
		dev_warn(&req->adapter->ccw_device->dev,
1346
			 "Not enough FCP adapter resources to open "
1347 1348
			 "remote port 0x%016Lx\n",
			 (unsigned long long)port->wwpn);
1349 1350
		zfcp_erp_set_port_status(port,
					 ZFCP_STATUS_COMMON_ERP_FAILED);
1351
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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1352 1353 1354 1355 1356 1357
		break;
	case FSF_ADAPTER_STATUS_AVAILABLE:
		switch (header->fsf_status_qual.word[0]) {
		case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
		case FSF_SQ_NO_RETRY_POSSIBLE:
1358
			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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1359 1360 1361 1362 1363 1364 1365
			break;
		}
		break;
	case FSF_GOOD:
		port->handle = header->port_handle;
		atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
				ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1366 1367 1368
		atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
		                  ZFCP_STATUS_COMMON_ACCESS_BOXED,
		                  &port->status);
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		/* check whether D_ID has changed during open */
		/*
		 * FIXME: This check is not airtight, as the FCP channel does
		 * not monitor closures of target port connections caused on
		 * the remote side. Thus, they might miss out on invalidating
		 * locally cached WWPNs (and other N_Port parameters) of gone
		 * target ports. So, our heroic attempt to make things safe
		 * could be undermined by 'open port' response data tagged with
		 * obsolete WWPNs. Another reason to monitor potential
		 * connection closures ourself at least (by interpreting
		 * incoming ELS' and unsolicited status). It just crosses my
		 * mind that one should be able to cross-check by means of
		 * another GID_PN straight after a port has been opened.
		 * Alternately, an ADISC/PDISC ELS should suffice, as well.
		 */
1384
		plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1385
		if (req->qtcb->bottom.support.els1_length >=
1386
		    FSF_PLOGI_MIN_LEN)
1387
				zfcp_fc_plogi_evaluate(port, plogi);
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1388 1389
		break;
	case FSF_UNKNOWN_OP_SUBTYPE:
1390
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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1391 1392
		break;
	}
1393 1394

out:
1395
	put_device(&port->dev);
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1396 1397
}

1398 1399 1400 1401
/**
 * zfcp_fsf_open_port - create and send open port request
 * @erp_action: pointer to struct zfcp_erp_action
 * Returns: 0 on success, error otherwise
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1402
 */
1403
int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
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1404
{
1405
	struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1406
	struct zfcp_port *port = erp_action->port;
1407
	struct zfcp_fsf_req *req;
1408 1409
	int retval = -EIO;

1410
	spin_lock_irq(&qdio->req_q_lock);
1411
	if (zfcp_qdio_sbal_get(qdio))
1412 1413
		goto out;

1414
	req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1415
				  SBAL_FLAGS0_TYPE_READ,
1416
				  qdio->adapter->pool.erp_req);
1417

1418
	if (IS_ERR(req)) {
1419
		retval = PTR_ERR(req);
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1420
		goto out;
1421
	}
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1422

1423
	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1424
	zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
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1425

1426
	req->handler = zfcp_fsf_open_port_handler;
1427
	hton24(req->qtcb->bottom.support.d_id, port->d_id);
1428
	req->data = port;
1429
	req->erp_action = erp_action;
1430
	erp_action->fsf_req_id = req->req_id;
1431
	get_device(&port->dev);
1432

1433
	zfcp_fsf_start_erp_timer(req);
1434
	retval = zfcp_fsf_req_send(req);
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1435
	if (retval) {
1436
		zfcp_fsf_req_free(req);
1437
		erp_action->fsf_req_id = 0;
1438
		put_device(&port->dev);
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1439
	}
1440
out:
1441
	spin_unlock_irq(&qdio->req_q_lock);
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1442 1443 1444
	return retval;
}

1445
static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
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1446
{
1447
	struct zfcp_port *port = req->data;
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1448

1449
	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1450
		return;
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1451

1452
	switch (req->qtcb->header.fsf_status) {
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1453
	case FSF_PORT_HANDLE_NOT_VALID:
1454
		zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1455
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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1456 1457 1458 1459
		break;
	case FSF_ADAPTER_STATUS_AVAILABLE:
		break;
	case FSF_GOOD:
1460
		zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
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1461 1462 1463 1464
		break;
	}
}

1465 1466 1467 1468
/**
 * zfcp_fsf_close_port - create and send close port request
 * @erp_action: pointer to struct zfcp_erp_action
 * Returns: 0 on success, error otherwise
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1469
 */
1470
int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
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1471
{
1472
	struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1473 1474 1475
	struct zfcp_fsf_req *req;
	int retval = -EIO;

1476
	spin_lock_irq(&qdio->req_q_lock);
1477
	if (zfcp_qdio_sbal_get(qdio))
1478 1479
		goto out;

1480
	req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1481
				  SBAL_FLAGS0_TYPE_READ,
1482
				  qdio->adapter->pool.erp_req);
1483

1484
	if (IS_ERR(req)) {
1485
		retval = PTR_ERR(req);
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1486
		goto out;
1487
	}
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1488

1489
	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1490
	zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
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1491

1492 1493 1494 1495
	req->handler = zfcp_fsf_close_port_handler;
	req->data = erp_action->port;
	req->erp_action = erp_action;
	req->qtcb->header.port_handle = erp_action->port->handle;
1496
	erp_action->fsf_req_id = req->req_id;
1497

1498
	zfcp_fsf_start_erp_timer(req);
1499
	retval = zfcp_fsf_req_send(req);
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	if (retval) {
1501
		zfcp_fsf_req_free(req);
1502
		erp_action->fsf_req_id = 0;
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1503
	}
1504
out:
1505
	spin_unlock_irq(&qdio->req_q_lock);
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1506 1507 1508
	return retval;
}

1509 1510
static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
{
1511
	struct zfcp_fc_wka_port *wka_port = req->data;
1512 1513 1514
	struct fsf_qtcb_header *header = &req->qtcb->header;

	if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1515
		wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1516 1517 1518 1519 1520 1521 1522
		goto out;
	}

	switch (header->fsf_status) {
	case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
		dev_warn(&req->adapter->ccw_device->dev,
			 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1523
		/* fall through */
1524 1525
	case FSF_ADAPTER_STATUS_AVAILABLE:
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1526
		/* fall through */
1527
	case FSF_ACCESS_DENIED:
1528
		wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1529 1530 1531
		break;
	case FSF_GOOD:
		wka_port->handle = header->port_handle;
1532 1533
		/* fall through */
	case FSF_PORT_ALREADY_OPEN:
1534
		wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1535 1536 1537 1538 1539 1540 1541
	}
out:
	wake_up(&wka_port->completion_wq);
}

/**
 * zfcp_fsf_open_wka_port - create and send open wka-port request
1542
 * @wka_port: pointer to struct zfcp_fc_wka_port
1543 1544
 * Returns: 0 on success, error otherwise
 */
1545
int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1546
{
1547
	struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1548 1549 1550
	struct zfcp_fsf_req *req;
	int retval = -EIO;

1551
	spin_lock_irq(&qdio->req_q_lock);
1552
	if (zfcp_qdio_sbal_get(qdio))
1553 1554
		goto out;

1555
	req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1556
				  SBAL_FLAGS0_TYPE_READ,
1557
				  qdio->adapter->pool.erp_req);
1558

1559
	if (IS_ERR(req)) {
1560 1561 1562 1563
		retval = PTR_ERR(req);
		goto out;
	}

1564
	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1565
	zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1566 1567

	req->handler = zfcp_fsf_open_wka_port_handler;
1568
	hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1569 1570 1571 1572 1573 1574 1575
	req->data = wka_port;

	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
	retval = zfcp_fsf_req_send(req);
	if (retval)
		zfcp_fsf_req_free(req);
out:
1576
	spin_unlock_irq(&qdio->req_q_lock);
1577 1578 1579 1580 1581
	return retval;
}

static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
{
1582
	struct zfcp_fc_wka_port *wka_port = req->data;
1583 1584 1585

	if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1586
		zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1587 1588
	}

1589
	wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1590 1591 1592 1593 1594
	wake_up(&wka_port->completion_wq);
}

/**
 * zfcp_fsf_close_wka_port - create and send close wka port request
1595
 * @wka_port: WKA port to open
1596 1597
 * Returns: 0 on success, error otherwise
 */
1598
int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1599
{
1600
	struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1601 1602 1603
	struct zfcp_fsf_req *req;
	int retval = -EIO;

1604
	spin_lock_irq(&qdio->req_q_lock);
1605
	if (zfcp_qdio_sbal_get(qdio))
1606 1607
		goto out;

1608
	req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1609
				  SBAL_FLAGS0_TYPE_READ,
1610
				  qdio->adapter->pool.erp_req);
1611

1612
	if (IS_ERR(req)) {
1613 1614 1615 1616
		retval = PTR_ERR(req);
		goto out;
	}

1617
	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1618
	zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1619 1620 1621 1622 1623 1624 1625 1626 1627 1628

	req->handler = zfcp_fsf_close_wka_port_handler;
	req->data = wka_port;
	req->qtcb->header.port_handle = wka_port->handle;

	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
	retval = zfcp_fsf_req_send(req);
	if (retval)
		zfcp_fsf_req_free(req);
out:
1629
	spin_unlock_irq(&qdio->req_q_lock);
1630 1631 1632
	return retval;
}

1633
static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
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1634
{
1635 1636
	struct zfcp_port *port = req->data;
	struct fsf_qtcb_header *header = &req->qtcb->header;
1637
	struct scsi_device *sdev;
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1638

1639
	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1640
		return;
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1641 1642 1643

	switch (header->fsf_status) {
	case FSF_PORT_HANDLE_NOT_VALID:
1644
		zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1645
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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1646 1647
		break;
	case FSF_ACCESS_DENIED:
1648
		zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
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1649 1650
		break;
	case FSF_PORT_BOXED:
1651 1652 1653
		/* can't use generic zfcp_erp_modify_port_status because
		 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
		atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1654 1655 1656 1657
		shost_for_each_device(sdev, port->adapter->scsi_host)
			if (sdev_to_zfcp(sdev)->port == port)
				atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
						  &sdev_to_zfcp(sdev)->status);
1658 1659
		zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
		zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1660
				     "fscpph2");
1661
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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1662 1663 1664 1665
		break;
	case FSF_ADAPTER_STATUS_AVAILABLE:
		switch (header->fsf_status_qual.word[0]) {
		case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1666
			/* fall through */
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1667
		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1668
			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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1669 1670 1671 1672 1673 1674 1675 1676
			break;
		}
		break;
	case FSF_GOOD:
		/* can't use generic zfcp_erp_modify_port_status because
		 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
		 */
		atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1677 1678 1679 1680
		shost_for_each_device(sdev, port->adapter->scsi_host)
			if (sdev_to_zfcp(sdev)->port == port)
				atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
						  &sdev_to_zfcp(sdev)->status);
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1681 1682 1683 1684
		break;
	}
}

1685 1686 1687 1688
/**
 * zfcp_fsf_close_physical_port - close physical port
 * @erp_action: pointer to struct zfcp_erp_action
 * Returns: 0 on success
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1689
 */
1690
int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
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1691
{
1692
	struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1693 1694 1695
	struct zfcp_fsf_req *req;
	int retval = -EIO;

1696
	spin_lock_irq(&qdio->req_q_lock);
1697
	if (zfcp_qdio_sbal_get(qdio))
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1698 1699
		goto out;

1700
	req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1701
				  SBAL_FLAGS0_TYPE_READ,
1702
				  qdio->adapter->pool.erp_req);
1703

1704
	if (IS_ERR(req)) {
1705 1706 1707
		retval = PTR_ERR(req);
		goto out;
	}
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1708

1709
	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1710
	zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
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1711

1712 1713 1714 1715
	req->data = erp_action->port;
	req->qtcb->header.port_handle = erp_action->port->handle;
	req->erp_action = erp_action;
	req->handler = zfcp_fsf_close_physical_port_handler;
1716
	erp_action->fsf_req_id = req->req_id;
1717

1718
	zfcp_fsf_start_erp_timer(req);
1719
	retval = zfcp_fsf_req_send(req);
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1720
	if (retval) {
1721
		zfcp_fsf_req_free(req);
1722
		erp_action->fsf_req_id = 0;
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1723
	}
1724
out:
1725
	spin_unlock_irq(&qdio->req_q_lock);
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1726 1727 1728
	return retval;
}

1729
static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
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1730
{
1731
	struct zfcp_adapter *adapter = req->adapter;
1732 1733
	struct scsi_device *sdev = req->data;
	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
1734 1735
	struct fsf_qtcb_header *header = &req->qtcb->header;
	struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
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1736

1737
	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1738
		return;
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1739 1740

	atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1741
			  ZFCP_STATUS_COMMON_ACCESS_BOXED |
1742 1743 1744
			  ZFCP_STATUS_LUN_SHARED |
			  ZFCP_STATUS_LUN_READONLY,
			  &zfcp_sdev->status);
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1745 1746 1747 1748

	switch (header->fsf_status) {

	case FSF_PORT_HANDLE_NOT_VALID:
1749
		zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1750
		/* fall through */
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1751 1752 1753
	case FSF_LUN_ALREADY_OPEN:
		break;
	case FSF_ACCESS_DENIED:
1754 1755
		zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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1756 1757
		break;
	case FSF_PORT_BOXED:
1758 1759 1760
		zfcp_erp_set_port_status(zfcp_sdev->port,
					 ZFCP_STATUS_COMMON_ACCESS_BOXED);
		zfcp_erp_port_reopen(zfcp_sdev->port,
1761
				     ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1762
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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1763 1764
		break;
	case FSF_LUN_SHARING_VIOLATION:
1765
		zfcp_cfdc_lun_shrng_vltn(sdev, &header->fsf_status_qual);
1766
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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1767 1768
		break;
	case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1769
		dev_warn(&adapter->ccw_device->dev,
1770 1771
			 "No handle is available for LUN "
			 "0x%016Lx on port 0x%016Lx\n",
1772 1773
			 (unsigned long long)zfcp_scsi_dev_lun(sdev),
			 (unsigned long long)zfcp_sdev->port->wwpn);
1774
		zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1775 1776 1777
		/* fall through */
	case FSF_INVALID_COMMAND_OPTION:
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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		break;
	case FSF_ADAPTER_STATUS_AVAILABLE:
		switch (header->fsf_status_qual.word[0]) {
		case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1782
			zfcp_fc_test_link(zfcp_sdev->port);
1783
			/* fall through */
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1784
		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1785
			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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			break;
		}
		break;

	case FSF_GOOD:
1791 1792
		zfcp_sdev->lun_handle = header->lun_handle;
		atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1793
		zfcp_cfdc_open_lun_eval(sdev, bottom);
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		break;
	}
}

1798
/**
1799
 * zfcp_fsf_open_lun - open LUN
1800 1801
 * @erp_action: pointer to struct zfcp_erp_action
 * Returns: 0 on success, error otherwise
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1802
 */
1803
int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
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1804
{
1805
	struct zfcp_adapter *adapter = erp_action->adapter;
1806
	struct zfcp_qdio *qdio = adapter->qdio;
1807 1808 1809
	struct zfcp_fsf_req *req;
	int retval = -EIO;

1810
	spin_lock_irq(&qdio->req_q_lock);
1811
	if (zfcp_qdio_sbal_get(qdio))
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		goto out;

1814
	req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1815
				  SBAL_FLAGS0_TYPE_READ,
1816
				  adapter->pool.erp_req);
1817

1818
	if (IS_ERR(req)) {
1819 1820 1821 1822
		retval = PTR_ERR(req);
		goto out;
	}

1823
	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1824
	zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
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1825

1826
	req->qtcb->header.port_handle = erp_action->port->handle;
1827 1828 1829
	req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
	req->handler = zfcp_fsf_open_lun_handler;
	req->data = erp_action->sdev;
1830
	req->erp_action = erp_action;
1831
	erp_action->fsf_req_id = req->req_id;
1832 1833 1834 1835

	if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
		req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;

1836
	zfcp_fsf_start_erp_timer(req);
1837
	retval = zfcp_fsf_req_send(req);
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1838
	if (retval) {
1839
		zfcp_fsf_req_free(req);
1840
		erp_action->fsf_req_id = 0;
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1841
	}
1842
out:
1843
	spin_unlock_irq(&qdio->req_q_lock);
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1844 1845 1846
	return retval;
}

1847
static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
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1848
{
1849 1850
	struct scsi_device *sdev = req->data;
	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
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1851

1852
	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1853
		return;
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1854

1855
	switch (req->qtcb->header.fsf_status) {
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1856
	case FSF_PORT_HANDLE_NOT_VALID:
1857
		zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1858
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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1859 1860
		break;
	case FSF_LUN_HANDLE_NOT_VALID:
1861
		zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1862
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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1863 1864
		break;
	case FSF_PORT_BOXED:
1865 1866 1867
		zfcp_erp_set_port_status(zfcp_sdev->port,
					 ZFCP_STATUS_COMMON_ACCESS_BOXED);
		zfcp_erp_port_reopen(zfcp_sdev->port,
1868
				     ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1869
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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1870 1871
		break;
	case FSF_ADAPTER_STATUS_AVAILABLE:
1872
		switch (req->qtcb->header.fsf_status_qual.word[0]) {
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1873
		case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1874
			zfcp_fc_test_link(zfcp_sdev->port);
1875
			/* fall through */
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1876
		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1877
			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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1878 1879 1880 1881
			break;
		}
		break;
	case FSF_GOOD:
1882
		atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
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1883 1884 1885 1886 1887
		break;
	}
}

/**
1888 1889
 * zfcp_fsf_close_LUN - close LUN
 * @erp_action: pointer to erp_action triggering the "close LUN"
1890
 * Returns: 0 on success, error otherwise
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1891
 */
1892
int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
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1893
{
1894
	struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1895
	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1896 1897
	struct zfcp_fsf_req *req;
	int retval = -EIO;
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1898

1899
	spin_lock_irq(&qdio->req_q_lock);
1900
	if (zfcp_qdio_sbal_get(qdio))
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1901
		goto out;
1902

1903
	req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1904
				  SBAL_FLAGS0_TYPE_READ,
1905
				  qdio->adapter->pool.erp_req);
1906

1907
	if (IS_ERR(req)) {
1908 1909 1910
		retval = PTR_ERR(req);
		goto out;
	}
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1911

1912
	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1913
	zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
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1914

1915
	req->qtcb->header.port_handle = erp_action->port->handle;
1916 1917 1918
	req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
	req->handler = zfcp_fsf_close_lun_handler;
	req->data = erp_action->sdev;
1919
	req->erp_action = erp_action;
1920
	erp_action->fsf_req_id = req->req_id;
1921

1922
	zfcp_fsf_start_erp_timer(req);
1923 1924 1925
	retval = zfcp_fsf_req_send(req);
	if (retval) {
		zfcp_fsf_req_free(req);
1926
		erp_action->fsf_req_id = 0;
1927 1928
	}
out:
1929
	spin_unlock_irq(&qdio->req_q_lock);
1930
	return retval;
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1931 1932
}

1933 1934 1935
static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
{
	lat_rec->sum += lat;
1936 1937
	lat_rec->min = min(lat_rec->min, lat);
	lat_rec->max = max(lat_rec->max, lat);
1938 1939
}

1940
static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
1941
{
1942 1943
	struct fsf_qual_latency_info *lat_in;
	struct latency_cont *lat = NULL;
1944
	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scsi->device);
1945 1946
	struct zfcp_blk_drv_data blktrc;
	int ticks = req->adapter->timer_ticks;
1947

1948
	lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
1949

1950 1951 1952 1953
	blktrc.flags = 0;
	blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
		blktrc.flags |= ZFCP_BLK_REQ_ERROR;
1954
	blktrc.inb_usage = 0;
1955
	blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
1956

1957 1958
	if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
	    !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
1959 1960 1961 1962 1963
		blktrc.flags |= ZFCP_BLK_LAT_VALID;
		blktrc.channel_lat = lat_in->channel_lat * ticks;
		blktrc.fabric_lat = lat_in->fabric_lat * ticks;

		switch (req->qtcb->bottom.io.data_direction) {
1964 1965
		case FSF_DATADIR_DIF_READ_STRIP:
		case FSF_DATADIR_DIF_READ_CONVERT:
1966
		case FSF_DATADIR_READ:
1967
			lat = &zfcp_sdev->latencies.read;
1968
			break;
1969 1970
		case FSF_DATADIR_DIF_WRITE_INSERT:
		case FSF_DATADIR_DIF_WRITE_CONVERT:
1971
		case FSF_DATADIR_WRITE:
1972
			lat = &zfcp_sdev->latencies.write;
1973 1974
			break;
		case FSF_DATADIR_CMND:
1975
			lat = &zfcp_sdev->latencies.cmd;
1976 1977
			break;
		}
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1978

1979
		if (lat) {
1980
			spin_lock(&zfcp_sdev->latencies.lock);
1981 1982 1983
			zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
			zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
			lat->counter++;
1984
			spin_unlock(&zfcp_sdev->latencies.lock);
1985
		}
1986 1987
	}

1988 1989
	blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
			    sizeof(blktrc));
1990 1991
}

1992
static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
1993
{
1994 1995 1996
	struct scsi_cmnd *scmnd = req->data;
	struct scsi_device *sdev = scmnd->device;
	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
1997 1998 1999
	struct fsf_qtcb_header *header = &req->qtcb->header;

	if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2000
		return;
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2001

2002 2003 2004
	switch (header->fsf_status) {
	case FSF_HANDLE_MISMATCH:
	case FSF_PORT_HANDLE_NOT_VALID:
2005
		zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1");
2006 2007 2008 2009
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
		break;
	case FSF_FCPLUN_NOT_VALID:
	case FSF_LUN_HANDLE_NOT_VALID:
2010
		zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2011
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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2012
		break;
2013 2014
	case FSF_SERVICE_CLASS_NOT_SUPPORTED:
		zfcp_fsf_class_not_supp(req);
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2015
		break;
2016
	case FSF_ACCESS_DENIED:
2017 2018
		zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2019 2020 2021
		break;
	case FSF_DIRECTION_INDICATOR_NOT_VALID:
		dev_err(&req->adapter->ccw_device->dev,
2022
			"Incorrect direction %d, LUN 0x%016Lx on port "
2023
			"0x%016Lx closed\n",
2024
			req->qtcb->bottom.io.data_direction,
2025 2026 2027
			(unsigned long long)zfcp_scsi_dev_lun(sdev),
			(unsigned long long)zfcp_sdev->port->wwpn);
		zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2028
					  "fssfch3");
2029 2030 2031 2032
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
		break;
	case FSF_CMND_LENGTH_NOT_VALID:
		dev_err(&req->adapter->ccw_device->dev,
2033
			"Incorrect CDB length %d, LUN 0x%016Lx on "
2034
			"port 0x%016Lx closed\n",
2035
			req->qtcb->bottom.io.fcp_cmnd_length,
2036 2037 2038
			(unsigned long long)zfcp_scsi_dev_lun(sdev),
			(unsigned long long)zfcp_sdev->port->wwpn);
		zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2039
					  "fssfch4");
2040 2041 2042
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
		break;
	case FSF_PORT_BOXED:
2043 2044 2045
		zfcp_erp_set_port_status(zfcp_sdev->port,
					 ZFCP_STATUS_COMMON_ACCESS_BOXED);
		zfcp_erp_port_reopen(zfcp_sdev->port,
2046
				     ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2047
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2048 2049
		break;
	case FSF_LUN_BOXED:
2050 2051
		zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
		zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2052
				    "fssfch6");
2053
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2054 2055 2056 2057
		break;
	case FSF_ADAPTER_STATUS_AVAILABLE:
		if (header->fsf_status_qual.word[0] ==
		    FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2058
			zfcp_fc_test_link(zfcp_sdev->port);
2059
		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
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2060 2061
		break;
	}
2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075
}

static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
{
	struct scsi_cmnd *scpnt;
	struct fcp_resp_with_ext *fcp_rsp;
	unsigned long flags;

	read_lock_irqsave(&req->adapter->abort_lock, flags);

	scpnt = req->data;
	if (unlikely(!scpnt)) {
		read_unlock_irqrestore(&req->adapter->abort_lock, flags);
		return;
2076
	}
2077

2078 2079
	zfcp_fsf_fcp_handler_common(req);

2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104
	if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
		set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
		goto skip_fsfstatus;
	}

	switch (req->qtcb->header.fsf_status) {
	case FSF_INCONSISTENT_PROT_DATA:
	case FSF_INVALID_PROT_PARM:
		set_host_byte(scpnt, DID_ERROR);
		goto skip_fsfstatus;
	case FSF_BLOCK_GUARD_CHECK_FAILURE:
		zfcp_scsi_dif_sense_error(scpnt, 0x1);
		goto skip_fsfstatus;
	case FSF_APP_TAG_CHECK_FAILURE:
		zfcp_scsi_dif_sense_error(scpnt, 0x2);
		goto skip_fsfstatus;
	case FSF_REF_TAG_CHECK_FAILURE:
		zfcp_scsi_dif_sense_error(scpnt, 0x3);
		goto skip_fsfstatus;
	}
	fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
	zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);

skip_fsfstatus:
	zfcp_fsf_req_trace(req, scpnt);
2105
	zfcp_dbf_scsi_result(scpnt, req);
2106 2107 2108 2109 2110 2111 2112 2113 2114 2115

	scpnt->host_scribble = NULL;
	(scpnt->scsi_done) (scpnt);
	/*
	 * We must hold this lock until scsi_done has been called.
	 * Otherwise we may call scsi_done after abort regarding this
	 * command has completed.
	 * Note: scsi_done must not block!
	 */
	read_unlock_irqrestore(&req->adapter->abort_lock, flags);
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2116 2117
}

2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155
static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
{
	switch (scsi_get_prot_op(scsi_cmnd)) {
	case SCSI_PROT_NORMAL:
		switch (scsi_cmnd->sc_data_direction) {
		case DMA_NONE:
			*data_dir = FSF_DATADIR_CMND;
			break;
		case DMA_FROM_DEVICE:
			*data_dir = FSF_DATADIR_READ;
			break;
		case DMA_TO_DEVICE:
			*data_dir = FSF_DATADIR_WRITE;
			break;
		case DMA_BIDIRECTIONAL:
			return -EINVAL;
		}
		break;

	case SCSI_PROT_READ_STRIP:
		*data_dir = FSF_DATADIR_DIF_READ_STRIP;
		break;
	case SCSI_PROT_WRITE_INSERT:
		*data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
		break;
	case SCSI_PROT_READ_PASS:
		*data_dir = FSF_DATADIR_DIF_READ_CONVERT;
		break;
	case SCSI_PROT_WRITE_PASS:
		*data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

2156
/**
2157
 * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2158
 * @scsi_cmnd: scsi command to be sent
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2159
 */
2160
int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
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2161
{
2162
	struct zfcp_fsf_req *req;
2163
	struct fcp_cmnd *fcp_cmnd;
2164
	unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2165
	int real_bytes, retval = -EIO, dix_bytes = 0;
2166 2167 2168
	struct scsi_device *sdev = scsi_cmnd->device;
	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
	struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2169
	struct zfcp_qdio *qdio = adapter->qdio;
2170
	struct fsf_qtcb_bottom_io *io;
2171
	unsigned long flags;
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2172

2173
	if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2174 2175
		       ZFCP_STATUS_COMMON_UNBLOCKED)))
		return -EBUSY;
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2176

2177
	spin_lock_irqsave(&qdio->req_q_lock, flags);
2178
	if (atomic_read(&qdio->req_q_free) <= 0) {
2179
		atomic_inc(&qdio->req_q_full);
2180
		goto out;
2181
	}
2182

2183 2184 2185
	if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
		sbtype = SBAL_FLAGS0_TYPE_WRITE;

2186
	req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2187
				  sbtype, adapter->pool.scsi_req);
2188

2189
	if (IS_ERR(req)) {
2190 2191 2192 2193
		retval = PTR_ERR(req);
		goto out;
	}

2194 2195 2196
	scsi_cmnd->host_scribble = (unsigned char *) req->req_id;

	io = &req->qtcb->bottom.io;
2197
	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2198
	req->data = scsi_cmnd;
2199
	req->handler = zfcp_fsf_fcp_cmnd_handler;
2200 2201
	req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
	req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2202 2203
	io->service_class = FSF_CLASS_3;
	io->fcp_cmnd_length = FCP_CMND_LEN;
2204

2205 2206 2207
	if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
		io->data_block_length = scsi_cmnd->device->sector_size;
		io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
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2208 2209
	}

2210 2211
	zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction);

2212 2213
	fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
	zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd);
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2214

2215 2216 2217 2218 2219 2220 2221 2222
	if (scsi_prot_sg_count(scsi_cmnd)) {
		zfcp_qdio_set_data_div(qdio, &req->qdio_req,
				       scsi_prot_sg_count(scsi_cmnd));
		dix_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
						scsi_prot_sglist(scsi_cmnd));
		io->prot_data_length = dix_bytes;
	}

2223
	real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2224
					     scsi_sglist(scsi_cmnd));
2225 2226

	if (unlikely(real_bytes < 0) || unlikely(dix_bytes < 0))
2227
		goto failed_scsi_cmnd;
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2228

2229 2230
	zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);

2231 2232 2233
	retval = zfcp_fsf_req_send(req);
	if (unlikely(retval))
		goto failed_scsi_cmnd;
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2234

2235
	goto out;
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2236

2237 2238 2239 2240
failed_scsi_cmnd:
	zfcp_fsf_req_free(req);
	scsi_cmnd->host_scribble = NULL;
out:
2241
	spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2242
	return retval;
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2243 2244
}

2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259
static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
{
	struct fcp_resp_with_ext *fcp_rsp;
	struct fcp_resp_rsp_info *rsp_info;

	zfcp_fsf_fcp_handler_common(req);

	fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
	rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];

	if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
	     (req->status & ZFCP_STATUS_FSFREQ_ERROR))
		req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
}

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2260
/**
2261 2262
 * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
 * @scmnd: SCSI command to send the task management command for
2263 2264
 * @tm_flags: unsigned byte for task management flags
 * Returns: on success pointer to struct fsf_req, NULL otherwise
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 */
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struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
					    u8 tm_flags)
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{
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	struct zfcp_fsf_req *req = NULL;
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	struct fcp_cmnd *fcp_cmnd;
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	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
	struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
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	if (unlikely(!(atomic_read(&zfcp_sdev->status) &
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		       ZFCP_STATUS_COMMON_UNBLOCKED)))
		return NULL;
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	spin_lock_irq(&qdio->req_q_lock);
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	if (zfcp_qdio_sbal_get(qdio))
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		goto out;
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	req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
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				  SBAL_FLAGS0_TYPE_WRITE,
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				  qdio->adapter->pool.scsi_req);
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	if (IS_ERR(req)) {
		req = NULL;
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		goto out;
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	}
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	req->data = scmnd;
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	req->handler = zfcp_fsf_fcp_task_mgmt_handler;
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	req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
	req->qtcb->header.port_handle = zfcp_sdev->port->handle;
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	req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
	req->qtcb->bottom.io.service_class = FSF_CLASS_3;
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	req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
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	zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
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	fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
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	zfcp_fc_fcp_tm(fcp_cmnd, scmnd->device, tm_flags);
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	zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
	if (!zfcp_fsf_req_send(req))
		goto out;
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	zfcp_fsf_req_free(req);
	req = NULL;
out:
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	spin_unlock_irq(&qdio->req_q_lock);
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	return req;
}
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static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
{
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}

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/**
 * zfcp_fsf_control_file - control file upload/download
 * @adapter: pointer to struct zfcp_adapter
 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
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 */
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struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
					   struct zfcp_fsf_cfdc *fsf_cfdc)
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{
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	struct zfcp_qdio *qdio = adapter->qdio;
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	struct zfcp_fsf_req *req = NULL;
	struct fsf_qtcb_bottom_support *bottom;
	int direction, retval = -EIO, bytes;

	if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
		return ERR_PTR(-EOPNOTSUPP);

	switch (fsf_cfdc->command) {
	case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
		direction = SBAL_FLAGS0_TYPE_WRITE;
		break;
	case FSF_QTCB_UPLOAD_CONTROL_FILE:
		direction = SBAL_FLAGS0_TYPE_READ;
		break;
	default:
		return ERR_PTR(-EINVAL);
	}
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2346

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	spin_lock_irq(&qdio->req_q_lock);
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	if (zfcp_qdio_sbal_get(qdio))
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		goto out;
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2350

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	req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, direction, NULL);
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	if (IS_ERR(req)) {
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		retval = -EPERM;
		goto out;
	}
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	req->handler = zfcp_fsf_control_file_handler;
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	bottom = &req->qtcb->bottom.support;
	bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
	bottom->option = fsf_cfdc->option;
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	bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, fsf_cfdc->sg);

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	if (bytes != ZFCP_CFDC_MAX_SIZE) {
		zfcp_fsf_req_free(req);
		goto out;
	}
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	zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
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	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
	retval = zfcp_fsf_req_send(req);
out:
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	spin_unlock_irq(&qdio->req_q_lock);
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2376
	if (!retval) {
2377
		wait_for_completion(&req->completion);
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		return req;
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	}
2380
	return ERR_PTR(retval);
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}
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/**
 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
 * @adapter: pointer to struct zfcp_adapter
 * @sbal_idx: response queue index of SBAL to be processed
 */
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void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2389
{
2390
	struct zfcp_adapter *adapter = qdio->adapter;
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	struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
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	struct qdio_buffer_element *sbale;
	struct zfcp_fsf_req *fsf_req;
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	unsigned long req_id;
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	int idx;

	for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {

		sbale = &sbal->element[idx];
		req_id = (unsigned long) sbale->addr;
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		fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2402

2403
		if (!fsf_req) {
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			/*
			 * Unknown request means that we have potentially memory
			 * corruption and must stop the machine immediately.
			 */
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			zfcp_qdio_siosl(adapter);
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			panic("error: unknown req_id (%lx) on adapter %s.\n",
			      req_id, dev_name(&adapter->ccw_device->dev));
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		}
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		fsf_req->qdio_req.sbal_response = sbal_idx;
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		zfcp_fsf_req_complete(fsf_req);

		if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
			break;
	}
}
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struct zfcp_fsf_req *zfcp_fsf_get_req(struct zfcp_qdio *qdio,
				      struct qdio_buffer *sbal)
{
	struct qdio_buffer_element *sbale = &sbal->element[0];
	u64 req_id = (unsigned long) sbale->addr;

	return zfcp_reqlist_find(qdio->adapter->req_list, req_id);
}