// SPDX-License-Identifier: GPL-2.0
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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 Corp. 2002, 2020
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*/
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#define KMSG_COMPONENT "zfcp"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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#include <linux/blktrace_api.h>
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#include <linux/jiffies.h>
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#include <linux/types.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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#include "zfcp_diag.h"
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/* timeout for FSF requests sent during scsi_eh: abort or FCP TMF */
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#define ZFCP_FSF_SCSI_ER_TIMEOUT (10*HZ)
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/* timeout for: exchange config/port data outside ERP, or open/close WKA port */
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#define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ)
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struct kmem_cache *zfcp_fsf_qtcb_cache;
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static bool ber_stop = true;
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module_param(ber_stop, bool, 0600);
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MODULE_PARM_DESC(ber_stop,
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"Shuts down FCP devices for FCP channels that report a bit-error count in excess of its threshold (default on)");
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static void zfcp_fsf_request_timeout_handler(struct timer_list *t)
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{
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struct zfcp_fsf_req *fsf_req = from_timer(fsf_req, t, timer);
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struct zfcp_adapter *adapter = fsf_req->adapter;
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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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}
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static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
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unsigned long timeout)
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{
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fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
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fsf_req->timer.expires = jiffies + timeout;
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add_timer(&fsf_req->timer);
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}
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static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
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{
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BUG_ON(!fsf_req->erp_action);
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fsf_req->timer.function = zfcp_erp_timeout_handler;
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fsf_req->timer.expires = jiffies + 30 * HZ;
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add_timer(&fsf_req->timer);
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}
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/* association between FSF command and FSF QTCB type */
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static u32 fsf_qtcb_type[] = {
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[FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
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[FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
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[FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
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[FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
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[FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
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[FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
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[FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
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[FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
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[FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
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[FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
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[FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
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[FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
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[FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
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};
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static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
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{
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dev_err(&req->adapter->ccw_device->dev, "FCP device not "
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"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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}
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/**
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* zfcp_fsf_req_free - free memory used by fsf request
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* @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(!zfcp_fsf_req_is_status_read_buffer(req)))
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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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}
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if (likely(!zfcp_fsf_req_is_status_read_buffer(req)))
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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;
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struct zfcp_adapter *adapter = req->adapter;
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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);
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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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void zfcp_fsf_fc_host_link_down(struct zfcp_adapter *adapter)
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{
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struct Scsi_Host *shost = adapter->scsi_host;
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adapter->hydra_version = 0;
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adapter->peer_wwpn = 0;
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adapter->peer_wwnn = 0;
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adapter->peer_d_id = 0;
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/* if there is no shost yet, we have nothing to zero-out */
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if (shost == NULL)
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return;
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fc_host_port_id(shost) = 0;
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fc_host_fabric_name(shost) = 0;
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fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
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fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
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snprintf(fc_host_model(shost), FC_SYMBOLIC_NAME_SIZE, "0x%04x", 0);
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memset(fc_host_active_fc4s(shost), 0, FC_FC4_LIST_SIZE);
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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;
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atomic_or(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
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zfcp_scsi_schedule_rports_block(adapter);
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zfcp_fsf_fc_host_link_down(adapter);
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if (!link_down)
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goto out;
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switch (link_down->error_code) {
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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 "
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"fibre channel cable\n");
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break;
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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 "
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"channel cable\n");
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break;
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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 "
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"support FCP\n");
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break;
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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 "
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"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 "
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"duplicate or not valid\n");
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break;
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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;
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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;
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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 "
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"more NPIV ports\n");
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break;
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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 "
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"fibre channel fabric\n");
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break;
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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 "
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"has been damaged\n");
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break;
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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 "
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"has been damaged\n");
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break;
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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 "
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"been assigned\n");
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break;
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default:
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dev_warn(&req->adapter->ccw_device->dev,
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"The link between the FCP adapter and "
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"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;
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struct fsf_link_down_info *ldi =
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(struct fsf_link_down_info *) &sr_buf->payload;
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switch (sr_buf->status_subtype) {
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case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
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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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}
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static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
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{
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struct zfcp_adapter *adapter = req->adapter;
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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);
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return;
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}
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zfcp_dbf_hba_fsf_uss("fssrh_4", req);
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switch (sr_buf->status_type) {
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case FSF_STATUS_READ_PORT_CLOSED:
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zfcp_fsf_status_read_port_closed(req);
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break;
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case FSF_STATUS_READ_INCOMING_ELS:
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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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zfcp_dbf_hba_bit_err("fssrh_3", req);
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if (ber_stop) {
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dev_warn(&adapter->ccw_device->dev,
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"All paths over this FCP device are disused because of excessive bit errors\n");
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zfcp_erp_adapter_shutdown(adapter, 0, "fssrh_b");
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} else {
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dev_warn(&adapter->ccw_device->dev,
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"The error threshold for checksum statistics has been exceeded\n");
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}
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break;
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case FSF_STATUS_READ_LINK_DOWN:
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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;
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case FSF_STATUS_READ_LINK_UP:
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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,
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ZFCP_STATUS_COMMON_RUNNING);
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zfcp_erp_adapter_reopen(adapter,
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ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
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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;
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case FSF_STATUS_READ_NOTIFICATION_LOST:
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if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
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zfcp_fc_conditional_port_scan(adapter);
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break;
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case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
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adapter->adapter_features = sr_buf->payload.word[0];
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break;
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}
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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)
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{
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switch (req->qtcb->header.fsf_status_qual.word[0]) {
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case FSF_SQ_FCP_RSP_AVAILABLE:
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case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
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case FSF_SQ_NO_RETRY_POSSIBLE:
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case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
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return;
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case FSF_SQ_COMMAND_ABORTED:
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break;
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case FSF_SQ_NO_RECOM:
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dev_err(&req->adapter->ccw_device->dev,
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"The FCP adapter reported a problem "
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"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;
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}
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/* all non-return stats set FSFREQ_ERROR*/
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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))
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return;
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switch (req->qtcb->header.fsf_status) {
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case FSF_UNKNOWN_COMMAND:
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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;
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break;
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case FSF_ADAPTER_STATUS_AVAILABLE:
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zfcp_fsf_fsfstatus_qual_eval(req);
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break;
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}
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}
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static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
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{
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struct zfcp_adapter *adapter = req->adapter;
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struct fsf_qtcb *qtcb = req->qtcb;
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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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}
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switch (qtcb->prefix.prot_status) {
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case FSF_PROT_GOOD:
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case FSF_PROT_FSF_STATUS_PRESENTED:
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return;
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case FSF_PROT_QTCB_VERSION_ERROR:
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dev_err(&adapter->ccw_device->dev,
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"QTCB version 0x%x not supported by FCP adapter "
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"(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
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psq->word[0], psq->word[1]);
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zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1");
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break;
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case FSF_PROT_ERROR_STATE:
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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;
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case FSF_PROT_UNSUPP_QTCB_TYPE:
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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;
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case FSF_PROT_HOST_CONNECTION_INITIALIZING:
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atomic_or(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
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&adapter->status);
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break;
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case FSF_PROT_DUPLICATE_REQUEST_ID:
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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;
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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;
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case FSF_PROT_REEST_QUEUE:
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/* All ports should be marked as ready to run again */
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zfcp_erp_set_adapter_status(adapter,
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ZFCP_STATUS_COMMON_RUNNING);
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zfcp_erp_adapter_reopen(adapter,
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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:
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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);
|
zfcp_qdio_siosl(adapter);
|
zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9");
|
}
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req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
}
|
|
/**
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* zfcp_fsf_req_complete - process completion of a FSF request
|
* @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.
|
* Caller must ensure that the request has been removed from
|
* adapter->req_list, to protect against concurrent modification
|
* by zfcp_erp_strategy_check_fsfreq().
|
*/
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static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
|
{
|
struct zfcp_erp_action *erp_action;
|
|
if (unlikely(zfcp_fsf_req_is_status_read_buffer(req))) {
|
zfcp_fsf_status_read_handler(req);
|
return;
|
}
|
|
del_timer_sync(&req->timer);
|
zfcp_fsf_protstatus_eval(req);
|
zfcp_fsf_fsfstatus_eval(req);
|
req->handler(req);
|
|
erp_action = req->erp_action;
|
if (erp_action)
|
zfcp_erp_notify(erp_action, 0);
|
|
if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
|
zfcp_fsf_req_free(req);
|
else
|
complete(&req->completion);
|
}
|
|
/**
|
* 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);
|
zfcp_reqlist_move(adapter->req_list, &remove_queue);
|
|
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);
|
}
|
}
|
|
#define ZFCP_FSF_PORTSPEED_1GBIT (1 << 0)
|
#define ZFCP_FSF_PORTSPEED_2GBIT (1 << 1)
|
#define ZFCP_FSF_PORTSPEED_4GBIT (1 << 2)
|
#define ZFCP_FSF_PORTSPEED_10GBIT (1 << 3)
|
#define ZFCP_FSF_PORTSPEED_8GBIT (1 << 4)
|
#define ZFCP_FSF_PORTSPEED_16GBIT (1 << 5)
|
#define ZFCP_FSF_PORTSPEED_32GBIT (1 << 6)
|
#define ZFCP_FSF_PORTSPEED_64GBIT (1 << 7)
|
#define ZFCP_FSF_PORTSPEED_128GBIT (1 << 8)
|
#define ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED (1 << 15)
|
|
u32 zfcp_fsf_convert_portspeed(u32 fsf_speed)
|
{
|
u32 fdmi_speed = 0;
|
if (fsf_speed & ZFCP_FSF_PORTSPEED_1GBIT)
|
fdmi_speed |= FC_PORTSPEED_1GBIT;
|
if (fsf_speed & ZFCP_FSF_PORTSPEED_2GBIT)
|
fdmi_speed |= FC_PORTSPEED_2GBIT;
|
if (fsf_speed & ZFCP_FSF_PORTSPEED_4GBIT)
|
fdmi_speed |= FC_PORTSPEED_4GBIT;
|
if (fsf_speed & ZFCP_FSF_PORTSPEED_10GBIT)
|
fdmi_speed |= FC_PORTSPEED_10GBIT;
|
if (fsf_speed & ZFCP_FSF_PORTSPEED_8GBIT)
|
fdmi_speed |= FC_PORTSPEED_8GBIT;
|
if (fsf_speed & ZFCP_FSF_PORTSPEED_16GBIT)
|
fdmi_speed |= FC_PORTSPEED_16GBIT;
|
if (fsf_speed & ZFCP_FSF_PORTSPEED_32GBIT)
|
fdmi_speed |= FC_PORTSPEED_32GBIT;
|
if (fsf_speed & ZFCP_FSF_PORTSPEED_64GBIT)
|
fdmi_speed |= FC_PORTSPEED_64GBIT;
|
if (fsf_speed & ZFCP_FSF_PORTSPEED_128GBIT)
|
fdmi_speed |= FC_PORTSPEED_128GBIT;
|
if (fsf_speed & ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED)
|
fdmi_speed |= FC_PORTSPEED_NOT_NEGOTIATED;
|
return fdmi_speed;
|
}
|
|
static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
|
{
|
struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
|
struct zfcp_adapter *adapter = req->adapter;
|
struct fc_els_flogi *plogi;
|
|
/* adjust pointers for missing command code */
|
plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
|
- sizeof(u32));
|
|
if (req->data)
|
memcpy(req->data, bottom, sizeof(*bottom));
|
|
adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
|
adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
|
(u16)FSF_STATUS_READS_RECOM);
|
|
/* no error return above here, otherwise must fix call chains */
|
/* do not evaluate invalid fields */
|
if (req->qtcb->header.fsf_status == FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE)
|
return 0;
|
|
adapter->hydra_version = bottom->adapter_type;
|
|
switch (bottom->fc_topology) {
|
case FSF_TOPO_P2P:
|
adapter->peer_d_id = ntoh24(bottom->peer_d_id);
|
adapter->peer_wwpn = be64_to_cpu(plogi->fl_wwpn);
|
adapter->peer_wwnn = be64_to_cpu(plogi->fl_wwnn);
|
break;
|
case FSF_TOPO_FABRIC:
|
break;
|
case FSF_TOPO_AL:
|
default:
|
dev_err(&adapter->ccw_device->dev,
|
"Unknown or unsupported arbitrated loop "
|
"fibre channel topology detected\n");
|
zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
|
return -EIO;
|
}
|
|
return 0;
|
}
|
|
static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
|
{
|
struct zfcp_adapter *adapter = req->adapter;
|
struct zfcp_diag_header *const diag_hdr =
|
&adapter->diagnostics->config_data.header;
|
struct fsf_qtcb *qtcb = req->qtcb;
|
struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
|
|
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
|
return;
|
|
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;
|
|
switch (qtcb->header.fsf_status) {
|
case FSF_GOOD:
|
/*
|
* usually we wait with an update till the cache is too old,
|
* but because we have the data available, update it anyway
|
*/
|
zfcp_diag_update_xdata(diag_hdr, bottom, false);
|
|
zfcp_scsi_shost_update_config_data(adapter, bottom, false);
|
if (zfcp_fsf_exchange_config_evaluate(req))
|
return;
|
|
if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
|
dev_err(&adapter->ccw_device->dev,
|
"FCP adapter maximum QTCB size (%d bytes) "
|
"is too small\n",
|
bottom->max_qtcb_size);
|
zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
|
return;
|
}
|
atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
|
&adapter->status);
|
break;
|
case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
|
zfcp_diag_update_xdata(diag_hdr, bottom, true);
|
req->status |= ZFCP_STATUS_FSFREQ_XDATAINCOMPLETE;
|
|
/* avoids adapter shutdown to be able to recognize
|
* events such as LINK UP */
|
atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
|
&adapter->status);
|
zfcp_fsf_link_down_info_eval(req,
|
&qtcb->header.fsf_status_qual.link_down_info);
|
|
zfcp_scsi_shost_update_config_data(adapter, bottom, true);
|
if (zfcp_fsf_exchange_config_evaluate(req))
|
return;
|
break;
|
default:
|
zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
|
return;
|
}
|
|
if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)
|
adapter->hardware_version = bottom->hardware_version;
|
|
if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
|
dev_err(&adapter->ccw_device->dev,
|
"The FCP adapter only supports newer "
|
"control block versions\n");
|
zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
|
return;
|
}
|
if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
|
dev_err(&adapter->ccw_device->dev,
|
"The FCP adapter only supports older "
|
"control block versions\n");
|
zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
|
}
|
}
|
|
/*
|
* Mapping of FC Endpoint Security flag masks to mnemonics
|
*
|
* NOTE: Update macro ZFCP_FSF_MAX_FC_SECURITY_MNEMONIC_LENGTH when making any
|
* changes.
|
*/
|
static const struct {
|
u32 mask;
|
char *name;
|
} zfcp_fsf_fc_security_mnemonics[] = {
|
{ FSF_FC_SECURITY_AUTH, "Authentication" },
|
{ FSF_FC_SECURITY_ENC_FCSP2 |
|
FSF_FC_SECURITY_ENC_ERAS, "Encryption" },
|
};
|
|
/* maximum strlen(zfcp_fsf_fc_security_mnemonics[...].name) + 1 */
|
#define ZFCP_FSF_MAX_FC_SECURITY_MNEMONIC_LENGTH 15
|
|
/**
|
* zfcp_fsf_scnprint_fc_security() - translate FC Endpoint Security flags into
|
* mnemonics and place in a buffer
|
* @buf : the buffer to place the translated FC Endpoint Security flag(s)
|
* into
|
* @size : the size of the buffer, including the trailing null space
|
* @fc_security: one or more FC Endpoint Security flags, or zero
|
* @fmt : specifies whether a list or a single item is to be put into the
|
* buffer
|
*
|
* The Fibre Channel (FC) Endpoint Security flags are translated into mnemonics.
|
* If the FC Endpoint Security flags are zero "none" is placed into the buffer.
|
*
|
* With ZFCP_FSF_PRINT_FMT_LIST the mnemonics are placed as a list separated by
|
* a comma followed by a space into the buffer. If one or more FC Endpoint
|
* Security flags cannot be translated into a mnemonic, as they are undefined
|
* in zfcp_fsf_fc_security_mnemonics, their bitwise ORed value in hexadecimal
|
* representation is placed into the buffer.
|
*
|
* With ZFCP_FSF_PRINT_FMT_SINGLEITEM only one single mnemonic is placed into
|
* the buffer. If the FC Endpoint Security flag cannot be translated, as it is
|
* undefined in zfcp_fsf_fc_security_mnemonics, its value in hexadecimal
|
* representation is placed into the buffer. If more than one FC Endpoint
|
* Security flag was specified, their value in hexadecimal representation is
|
* placed into the buffer. The macro ZFCP_FSF_MAX_FC_SECURITY_MNEMONIC_LENGTH
|
* can be used to define a buffer that is large enough to hold one mnemonic.
|
*
|
* Return: The number of characters written into buf not including the trailing
|
* '\0'. If size is == 0 the function returns 0.
|
*/
|
ssize_t zfcp_fsf_scnprint_fc_security(char *buf, size_t size, u32 fc_security,
|
enum zfcp_fsf_print_fmt fmt)
|
{
|
const char *prefix = "";
|
ssize_t len = 0;
|
int i;
|
|
if (fc_security == 0)
|
return scnprintf(buf, size, "none");
|
if (fmt == ZFCP_FSF_PRINT_FMT_SINGLEITEM && hweight32(fc_security) != 1)
|
return scnprintf(buf, size, "0x%08x", fc_security);
|
|
for (i = 0; i < ARRAY_SIZE(zfcp_fsf_fc_security_mnemonics); i++) {
|
if (!(fc_security & zfcp_fsf_fc_security_mnemonics[i].mask))
|
continue;
|
|
len += scnprintf(buf + len, size - len, "%s%s", prefix,
|
zfcp_fsf_fc_security_mnemonics[i].name);
|
prefix = ", ";
|
fc_security &= ~zfcp_fsf_fc_security_mnemonics[i].mask;
|
}
|
|
if (fc_security != 0)
|
len += scnprintf(buf + len, size - len, "%s0x%08x",
|
prefix, fc_security);
|
|
return len;
|
}
|
|
static void zfcp_fsf_dbf_adapter_fc_security(struct zfcp_adapter *adapter,
|
struct zfcp_fsf_req *req)
|
{
|
if (adapter->fc_security_algorithms ==
|
adapter->fc_security_algorithms_old) {
|
/* no change, no trace */
|
return;
|
}
|
|
zfcp_dbf_hba_fsf_fces("fsfcesa", req, ZFCP_DBF_INVALID_WWPN,
|
adapter->fc_security_algorithms_old,
|
adapter->fc_security_algorithms);
|
|
adapter->fc_security_algorithms_old = adapter->fc_security_algorithms;
|
}
|
|
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;
|
|
if (req->data)
|
memcpy(req->data, bottom, sizeof(*bottom));
|
|
if (adapter->adapter_features & FSF_FEATURE_FC_SECURITY)
|
adapter->fc_security_algorithms =
|
bottom->fc_security_algorithms;
|
else
|
adapter->fc_security_algorithms = 0;
|
zfcp_fsf_dbf_adapter_fc_security(adapter, req);
|
}
|
|
static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
|
{
|
struct zfcp_diag_header *const diag_hdr =
|
&req->adapter->diagnostics->port_data.header;
|
struct fsf_qtcb *qtcb = req->qtcb;
|
struct fsf_qtcb_bottom_port *bottom = &qtcb->bottom.port;
|
|
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
|
return;
|
|
switch (qtcb->header.fsf_status) {
|
case FSF_GOOD:
|
/*
|
* usually we wait with an update till the cache is too old,
|
* but because we have the data available, update it anyway
|
*/
|
zfcp_diag_update_xdata(diag_hdr, bottom, false);
|
|
zfcp_scsi_shost_update_port_data(req->adapter, bottom);
|
zfcp_fsf_exchange_port_evaluate(req);
|
break;
|
case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
|
zfcp_diag_update_xdata(diag_hdr, bottom, true);
|
req->status |= ZFCP_STATUS_FSFREQ_XDATAINCOMPLETE;
|
|
zfcp_fsf_link_down_info_eval(req,
|
&qtcb->header.fsf_status_qual.link_down_info);
|
|
zfcp_scsi_shost_update_port_data(req->adapter, bottom);
|
zfcp_fsf_exchange_port_evaluate(req);
|
break;
|
}
|
}
|
|
static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
|
{
|
struct zfcp_fsf_req *req;
|
|
if (likely(pool))
|
req = mempool_alloc(pool, GFP_ATOMIC);
|
else
|
req = kmalloc(sizeof(*req), GFP_ATOMIC);
|
|
if (unlikely(!req))
|
return NULL;
|
|
memset(req, 0, sizeof(*req));
|
req->pool = pool;
|
return req;
|
}
|
|
static struct fsf_qtcb *zfcp_fsf_qtcb_alloc(mempool_t *pool)
|
{
|
struct fsf_qtcb *qtcb;
|
|
if (likely(pool))
|
qtcb = mempool_alloc(pool, GFP_ATOMIC);
|
else
|
qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
|
|
if (unlikely(!qtcb))
|
return NULL;
|
|
memset(qtcb, 0, sizeof(*qtcb));
|
return qtcb;
|
}
|
|
static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
|
u32 fsf_cmd, u8 sbtype,
|
mempool_t *pool)
|
{
|
struct zfcp_adapter *adapter = qdio->adapter;
|
struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
|
|
if (unlikely(!req))
|
return ERR_PTR(-ENOMEM);
|
|
if (adapter->req_no == 0)
|
adapter->req_no++;
|
|
INIT_LIST_HEAD(&req->list);
|
timer_setup(&req->timer, NULL, 0);
|
init_completion(&req->completion);
|
|
req->adapter = adapter;
|
req->req_id = adapter->req_no;
|
|
if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
|
if (likely(pool))
|
req->qtcb = zfcp_fsf_qtcb_alloc(
|
adapter->pool.qtcb_pool);
|
else
|
req->qtcb = zfcp_fsf_qtcb_alloc(NULL);
|
|
if (unlikely(!req->qtcb)) {
|
zfcp_fsf_req_free(req);
|
return ERR_PTR(-ENOMEM);
|
}
|
|
req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
|
req->qtcb->prefix.req_id = req->req_id;
|
req->qtcb->prefix.ulp_info = 26;
|
req->qtcb->prefix.qtcb_type = fsf_qtcb_type[fsf_cmd];
|
req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
|
req->qtcb->header.req_handle = req->req_id;
|
req->qtcb->header.fsf_command = fsf_cmd;
|
}
|
|
zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
|
req->qtcb, sizeof(struct fsf_qtcb));
|
|
return req;
|
}
|
|
static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
|
{
|
const bool is_srb = zfcp_fsf_req_is_status_read_buffer(req);
|
struct zfcp_adapter *adapter = req->adapter;
|
struct zfcp_qdio *qdio = adapter->qdio;
|
unsigned long req_id = req->req_id;
|
|
zfcp_reqlist_add(adapter->req_list, req);
|
|
req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
|
req->issued = get_tod_clock();
|
if (zfcp_qdio_send(qdio, &req->qdio_req)) {
|
del_timer_sync(&req->timer);
|
/* lookup request again, list might have changed */
|
zfcp_reqlist_find_rm(adapter->req_list, req_id);
|
zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
|
return -EIO;
|
}
|
|
/*
|
* NOTE: DO NOT TOUCH ASYNC req PAST THIS POINT.
|
* ONLY TOUCH SYNC req AGAIN ON req->completion.
|
*
|
* The request might complete and be freed concurrently at any point
|
* now. This is not protected by the QDIO-lock (req_q_lock). So any
|
* uncontrolled access after this might result in an use-after-free bug.
|
* Only if the request doesn't have ZFCP_STATUS_FSFREQ_CLEANUP set, and
|
* when it is completed via req->completion, is it safe to use req
|
* again.
|
*/
|
|
/* Don't increase for unsolicited status */
|
if (!is_srb)
|
adapter->fsf_req_seq_no++;
|
adapter->req_no++;
|
|
return 0;
|
}
|
|
/**
|
* zfcp_fsf_status_read - send status read request
|
* @qdio: pointer to struct zfcp_qdio
|
* Returns: 0 on success, ERROR otherwise
|
*/
|
int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
|
{
|
struct zfcp_adapter *adapter = qdio->adapter;
|
struct zfcp_fsf_req *req;
|
struct fsf_status_read_buffer *sr_buf;
|
struct page *page;
|
int retval = -EIO;
|
|
spin_lock_irq(&qdio->req_q_lock);
|
if (zfcp_qdio_sbal_get(qdio))
|
goto out;
|
|
req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
|
SBAL_SFLAGS0_TYPE_STATUS,
|
adapter->pool.status_read_req);
|
if (IS_ERR(req)) {
|
retval = PTR_ERR(req);
|
goto out;
|
}
|
|
page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
|
if (!page) {
|
retval = -ENOMEM;
|
goto failed_buf;
|
}
|
sr_buf = page_address(page);
|
memset(sr_buf, 0, sizeof(*sr_buf));
|
req->data = sr_buf;
|
|
zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
|
zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
|
|
retval = zfcp_fsf_req_send(req);
|
if (retval)
|
goto failed_req_send;
|
/* NOTE: DO NOT TOUCH req PAST THIS POINT! */
|
|
goto out;
|
|
failed_req_send:
|
req->data = NULL;
|
mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
|
failed_buf:
|
zfcp_dbf_hba_fsf_uss("fssr__1", req);
|
zfcp_fsf_req_free(req);
|
out:
|
spin_unlock_irq(&qdio->req_q_lock);
|
return retval;
|
}
|
|
static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
|
{
|
struct scsi_device *sdev = req->data;
|
struct zfcp_scsi_dev *zfcp_sdev;
|
union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
|
|
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
|
return;
|
|
zfcp_sdev = sdev_to_zfcp(sdev);
|
|
switch (req->qtcb->header.fsf_status) {
|
case FSF_PORT_HANDLE_NOT_VALID:
|
if (fsq->word[0] == fsq->word[1]) {
|
zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
|
"fsafch1");
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
}
|
break;
|
case FSF_LUN_HANDLE_NOT_VALID:
|
if (fsq->word[0] == fsq->word[1]) {
|
zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
}
|
break;
|
case FSF_FCP_COMMAND_DOES_NOT_EXIST:
|
req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
|
break;
|
case FSF_PORT_BOXED:
|
zfcp_erp_set_port_status(zfcp_sdev->port,
|
ZFCP_STATUS_COMMON_ACCESS_BOXED);
|
zfcp_erp_port_reopen(zfcp_sdev->port,
|
ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
case FSF_LUN_BOXED:
|
zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
|
zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
|
"fsafch4");
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
case FSF_ADAPTER_STATUS_AVAILABLE:
|
switch (fsq->word[0]) {
|
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
|
zfcp_fc_test_link(zfcp_sdev->port);
|
fallthrough;
|
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
}
|
break;
|
case FSF_GOOD:
|
req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
|
break;
|
}
|
}
|
|
/**
|
* zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
|
* @scmnd: The SCSI command to abort
|
* Returns: pointer to struct zfcp_fsf_req
|
*/
|
|
struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
|
{
|
struct zfcp_fsf_req *req = NULL;
|
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;
|
|
spin_lock_irq(&qdio->req_q_lock);
|
if (zfcp_qdio_sbal_get(qdio))
|
goto out;
|
req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
|
SBAL_SFLAGS0_TYPE_READ,
|
qdio->adapter->pool.scsi_abort);
|
if (IS_ERR(req)) {
|
req = NULL;
|
goto out;
|
}
|
|
if (unlikely(!(atomic_read(&zfcp_sdev->status) &
|
ZFCP_STATUS_COMMON_UNBLOCKED)))
|
goto out_error_free;
|
|
zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
|
|
req->data = sdev;
|
req->handler = zfcp_fsf_abort_fcp_command_handler;
|
req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
|
req->qtcb->header.port_handle = zfcp_sdev->port->handle;
|
req->qtcb->bottom.support.req_handle = (u64) old_req_id;
|
|
zfcp_fsf_start_timer(req, ZFCP_FSF_SCSI_ER_TIMEOUT);
|
if (!zfcp_fsf_req_send(req)) {
|
/* NOTE: DO NOT TOUCH req, UNTIL IT COMPLETES! */
|
goto out;
|
}
|
|
out_error_free:
|
zfcp_fsf_req_free(req);
|
req = NULL;
|
out:
|
spin_unlock_irq(&qdio->req_q_lock);
|
return req;
|
}
|
|
static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
|
{
|
struct zfcp_adapter *adapter = req->adapter;
|
struct zfcp_fsf_ct_els *ct = req->data;
|
struct fsf_qtcb_header *header = &req->qtcb->header;
|
|
ct->status = -EINVAL;
|
|
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
|
goto skip_fsfstatus;
|
|
switch (header->fsf_status) {
|
case FSF_GOOD:
|
ct->status = 0;
|
zfcp_dbf_san_res("fsscth2", req);
|
break;
|
case FSF_SERVICE_CLASS_NOT_SUPPORTED:
|
zfcp_fsf_class_not_supp(req);
|
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:
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
}
|
break;
|
case FSF_PORT_BOXED:
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
case FSF_PORT_HANDLE_NOT_VALID:
|
zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
|
fallthrough;
|
case FSF_GENERIC_COMMAND_REJECTED:
|
case FSF_PAYLOAD_SIZE_MISMATCH:
|
case FSF_REQUEST_SIZE_TOO_LARGE:
|
case FSF_RESPONSE_SIZE_TOO_LARGE:
|
case FSF_SBAL_MISMATCH:
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
}
|
|
skip_fsfstatus:
|
if (ct->handler)
|
ct->handler(ct->handler_data);
|
}
|
|
static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
|
struct zfcp_qdio_req *q_req,
|
struct scatterlist *sg_req,
|
struct scatterlist *sg_resp)
|
{
|
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);
|
}
|
|
static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
|
struct scatterlist *sg_req,
|
struct scatterlist *sg_resp)
|
{
|
struct zfcp_adapter *adapter = req->adapter;
|
struct zfcp_qdio *qdio = adapter->qdio;
|
struct fsf_qtcb *qtcb = req->qtcb;
|
u32 feat = adapter->adapter_features;
|
|
if (zfcp_adapter_multi_buffer_active(adapter)) {
|
if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
|
return -EIO;
|
qtcb->bottom.support.req_buf_length =
|
zfcp_qdio_real_bytes(sg_req);
|
if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
|
return -EIO;
|
qtcb->bottom.support.resp_buf_length =
|
zfcp_qdio_real_bytes(sg_resp);
|
|
zfcp_qdio_set_data_div(qdio, &req->qdio_req, sg_nents(sg_req));
|
zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
|
zfcp_qdio_set_scount(qdio, &req->qdio_req);
|
return 0;
|
}
|
|
/* use single, unchained SBAL if it can hold the request */
|
if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
|
zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
|
sg_req, sg_resp);
|
return 0;
|
}
|
|
if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
|
return -EOPNOTSUPP;
|
|
if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
|
return -EIO;
|
|
qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
|
|
zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
|
zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
|
|
if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
|
return -EIO;
|
|
qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
|
|
zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
|
|
return 0;
|
}
|
|
static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
|
struct scatterlist *sg_req,
|
struct scatterlist *sg_resp,
|
unsigned int timeout)
|
{
|
int ret;
|
|
ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
|
if (ret)
|
return ret;
|
|
/* common settings for ct/gs and els requests */
|
if (timeout > 255)
|
timeout = 255; /* max value accepted by hardware */
|
req->qtcb->bottom.support.service_class = FSF_CLASS_3;
|
req->qtcb->bottom.support.timeout = timeout;
|
zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
|
|
return 0;
|
}
|
|
/**
|
* zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
|
* @wka_port: pointer to zfcp WKA port to send CT/GS to
|
* @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
|
* @timeout: timeout that hardware should use, and a later software timeout
|
*/
|
int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
|
struct zfcp_fsf_ct_els *ct, mempool_t *pool,
|
unsigned int timeout)
|
{
|
struct zfcp_qdio *qdio = wka_port->adapter->qdio;
|
struct zfcp_fsf_req *req;
|
int ret = -EIO;
|
|
spin_lock_irq(&qdio->req_q_lock);
|
if (zfcp_qdio_sbal_get(qdio))
|
goto out;
|
|
req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
|
SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
|
|
if (IS_ERR(req)) {
|
ret = PTR_ERR(req);
|
goto out;
|
}
|
|
req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
|
ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
|
if (ret)
|
goto failed_send;
|
|
req->handler = zfcp_fsf_send_ct_handler;
|
req->qtcb->header.port_handle = wka_port->handle;
|
ct->d_id = wka_port->d_id;
|
req->data = ct;
|
|
zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
|
|
ret = zfcp_fsf_req_send(req);
|
if (ret)
|
goto failed_send;
|
/* NOTE: DO NOT TOUCH req PAST THIS POINT! */
|
|
goto out;
|
|
failed_send:
|
zfcp_fsf_req_free(req);
|
out:
|
spin_unlock_irq(&qdio->req_q_lock);
|
return ret;
|
}
|
|
static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
|
{
|
struct zfcp_fsf_ct_els *send_els = req->data;
|
struct fsf_qtcb_header *header = &req->qtcb->header;
|
|
send_els->status = -EINVAL;
|
|
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
|
goto skip_fsfstatus;
|
|
switch (header->fsf_status) {
|
case FSF_GOOD:
|
send_els->status = 0;
|
zfcp_dbf_san_res("fsselh1", req);
|
break;
|
case FSF_SERVICE_CLASS_NOT_SUPPORTED:
|
zfcp_fsf_class_not_supp(req);
|
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:
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
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_SBAL_MISMATCH:
|
/* should never occur, avoided in zfcp_fsf_send_els */
|
fallthrough;
|
default:
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
}
|
skip_fsfstatus:
|
if (send_els->handler)
|
send_els->handler(send_els->handler_data);
|
}
|
|
/**
|
* zfcp_fsf_send_els - initiate an ELS command (FC-FS)
|
* @adapter: pointer to zfcp adapter
|
* @d_id: N_Port_ID to send ELS to
|
* @els: pointer to struct zfcp_send_els with data for the command
|
* @timeout: timeout that hardware should use, and a later software timeout
|
*/
|
int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
|
struct zfcp_fsf_ct_els *els, unsigned int timeout)
|
{
|
struct zfcp_fsf_req *req;
|
struct zfcp_qdio *qdio = adapter->qdio;
|
int ret = -EIO;
|
|
spin_lock_irq(&qdio->req_q_lock);
|
if (zfcp_qdio_sbal_get(qdio))
|
goto out;
|
|
req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
|
SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
|
|
if (IS_ERR(req)) {
|
ret = PTR_ERR(req);
|
goto out;
|
}
|
|
req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
|
|
if (!zfcp_adapter_multi_buffer_active(adapter))
|
zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
|
|
ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
|
|
if (ret)
|
goto failed_send;
|
|
hton24(req->qtcb->bottom.support.d_id, d_id);
|
req->handler = zfcp_fsf_send_els_handler;
|
els->d_id = d_id;
|
req->data = els;
|
|
zfcp_dbf_san_req("fssels1", req, d_id);
|
|
ret = zfcp_fsf_req_send(req);
|
if (ret)
|
goto failed_send;
|
/* NOTE: DO NOT TOUCH req PAST THIS POINT! */
|
|
goto out;
|
|
failed_send:
|
zfcp_fsf_req_free(req);
|
out:
|
spin_unlock_irq(&qdio->req_q_lock);
|
return ret;
|
}
|
|
int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
|
{
|
struct zfcp_fsf_req *req;
|
struct zfcp_qdio *qdio = erp_action->adapter->qdio;
|
int retval = -EIO;
|
|
spin_lock_irq(&qdio->req_q_lock);
|
if (zfcp_qdio_sbal_get(qdio))
|
goto out;
|
|
req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
|
SBAL_SFLAGS0_TYPE_READ,
|
qdio->adapter->pool.erp_req);
|
|
if (IS_ERR(req)) {
|
retval = PTR_ERR(req);
|
goto out;
|
}
|
|
req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
|
zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
|
|
req->qtcb->bottom.config.feature_selection =
|
FSF_FEATURE_NOTIFICATION_LOST |
|
FSF_FEATURE_UPDATE_ALERT |
|
FSF_FEATURE_REQUEST_SFP_DATA |
|
FSF_FEATURE_FC_SECURITY;
|
req->erp_action = erp_action;
|
req->handler = zfcp_fsf_exchange_config_data_handler;
|
erp_action->fsf_req_id = req->req_id;
|
|
zfcp_fsf_start_erp_timer(req);
|
retval = zfcp_fsf_req_send(req);
|
if (retval) {
|
zfcp_fsf_req_free(req);
|
erp_action->fsf_req_id = 0;
|
}
|
/* NOTE: DO NOT TOUCH req PAST THIS POINT! */
|
out:
|
spin_unlock_irq(&qdio->req_q_lock);
|
return retval;
|
}
|
|
|
/**
|
* zfcp_fsf_exchange_config_data_sync() - Request information about FCP channel.
|
* @qdio: pointer to the QDIO-Queue to use for sending the command.
|
* @data: pointer to the QTCB-Bottom for storing the result of the command,
|
* might be %NULL.
|
*
|
* Returns:
|
* * 0 - Exchange Config Data was successful, @data is complete
|
* * -EIO - Exchange Config Data was not successful, @data is invalid
|
* * -EAGAIN - @data contains incomplete data
|
* * -ENOMEM - Some memory allocation failed along the way
|
*/
|
int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
|
struct fsf_qtcb_bottom_config *data)
|
{
|
struct zfcp_fsf_req *req = NULL;
|
int retval = -EIO;
|
|
spin_lock_irq(&qdio->req_q_lock);
|
if (zfcp_qdio_sbal_get(qdio))
|
goto out_unlock;
|
|
req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
|
SBAL_SFLAGS0_TYPE_READ, NULL);
|
|
if (IS_ERR(req)) {
|
retval = PTR_ERR(req);
|
goto out_unlock;
|
}
|
|
zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
|
req->handler = zfcp_fsf_exchange_config_data_handler;
|
|
req->qtcb->bottom.config.feature_selection =
|
FSF_FEATURE_NOTIFICATION_LOST |
|
FSF_FEATURE_UPDATE_ALERT |
|
FSF_FEATURE_REQUEST_SFP_DATA |
|
FSF_FEATURE_FC_SECURITY;
|
|
if (data)
|
req->data = data;
|
|
zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
|
retval = zfcp_fsf_req_send(req);
|
spin_unlock_irq(&qdio->req_q_lock);
|
|
if (!retval) {
|
/* NOTE: ONLY TOUCH SYNC req AGAIN ON req->completion. */
|
wait_for_completion(&req->completion);
|
|
if (req->status &
|
(ZFCP_STATUS_FSFREQ_ERROR | ZFCP_STATUS_FSFREQ_DISMISSED))
|
retval = -EIO;
|
else if (req->status & ZFCP_STATUS_FSFREQ_XDATAINCOMPLETE)
|
retval = -EAGAIN;
|
}
|
|
zfcp_fsf_req_free(req);
|
return retval;
|
|
out_unlock:
|
spin_unlock_irq(&qdio->req_q_lock);
|
return retval;
|
}
|
|
/**
|
* zfcp_fsf_exchange_port_data - request information about local port
|
* @erp_action: ERP action for the adapter for which port data is requested
|
* Returns: 0 on success, error otherwise
|
*/
|
int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
|
{
|
struct zfcp_qdio *qdio = erp_action->adapter->qdio;
|
struct zfcp_fsf_req *req;
|
int retval = -EIO;
|
|
if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
|
return -EOPNOTSUPP;
|
|
spin_lock_irq(&qdio->req_q_lock);
|
if (zfcp_qdio_sbal_get(qdio))
|
goto out;
|
|
req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
|
SBAL_SFLAGS0_TYPE_READ,
|
qdio->adapter->pool.erp_req);
|
|
if (IS_ERR(req)) {
|
retval = PTR_ERR(req);
|
goto out;
|
}
|
|
req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
|
zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
|
|
req->handler = zfcp_fsf_exchange_port_data_handler;
|
req->erp_action = erp_action;
|
erp_action->fsf_req_id = req->req_id;
|
|
zfcp_fsf_start_erp_timer(req);
|
retval = zfcp_fsf_req_send(req);
|
if (retval) {
|
zfcp_fsf_req_free(req);
|
erp_action->fsf_req_id = 0;
|
}
|
/* NOTE: DO NOT TOUCH req PAST THIS POINT! */
|
out:
|
spin_unlock_irq(&qdio->req_q_lock);
|
return retval;
|
}
|
|
/**
|
* zfcp_fsf_exchange_port_data_sync() - Request information about local port.
|
* @qdio: pointer to the QDIO-Queue to use for sending the command.
|
* @data: pointer to the QTCB-Bottom for storing the result of the command,
|
* might be %NULL.
|
*
|
* Returns:
|
* * 0 - Exchange Port Data was successful, @data is complete
|
* * -EIO - Exchange Port Data was not successful, @data is invalid
|
* * -EAGAIN - @data contains incomplete data
|
* * -ENOMEM - Some memory allocation failed along the way
|
* * -EOPNOTSUPP - This operation is not supported
|
*/
|
int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
|
struct fsf_qtcb_bottom_port *data)
|
{
|
struct zfcp_fsf_req *req = NULL;
|
int retval = -EIO;
|
|
if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
|
return -EOPNOTSUPP;
|
|
spin_lock_irq(&qdio->req_q_lock);
|
if (zfcp_qdio_sbal_get(qdio))
|
goto out_unlock;
|
|
req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
|
SBAL_SFLAGS0_TYPE_READ, NULL);
|
|
if (IS_ERR(req)) {
|
retval = PTR_ERR(req);
|
goto out_unlock;
|
}
|
|
if (data)
|
req->data = data;
|
|
zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
|
|
req->handler = zfcp_fsf_exchange_port_data_handler;
|
zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
|
retval = zfcp_fsf_req_send(req);
|
spin_unlock_irq(&qdio->req_q_lock);
|
|
if (!retval) {
|
/* NOTE: ONLY TOUCH SYNC req AGAIN ON req->completion. */
|
wait_for_completion(&req->completion);
|
|
if (req->status &
|
(ZFCP_STATUS_FSFREQ_ERROR | ZFCP_STATUS_FSFREQ_DISMISSED))
|
retval = -EIO;
|
else if (req->status & ZFCP_STATUS_FSFREQ_XDATAINCOMPLETE)
|
retval = -EAGAIN;
|
}
|
|
zfcp_fsf_req_free(req);
|
return retval;
|
|
out_unlock:
|
spin_unlock_irq(&qdio->req_q_lock);
|
return retval;
|
}
|
|
static void zfcp_fsf_log_port_fc_security(struct zfcp_port *port,
|
struct zfcp_fsf_req *req)
|
{
|
char mnemonic_old[ZFCP_FSF_MAX_FC_SECURITY_MNEMONIC_LENGTH];
|
char mnemonic_new[ZFCP_FSF_MAX_FC_SECURITY_MNEMONIC_LENGTH];
|
|
if (port->connection_info == port->connection_info_old) {
|
/* no change, no log nor trace */
|
return;
|
}
|
|
zfcp_dbf_hba_fsf_fces("fsfcesp", req, port->wwpn,
|
port->connection_info_old,
|
port->connection_info);
|
|
zfcp_fsf_scnprint_fc_security(mnemonic_old, sizeof(mnemonic_old),
|
port->connection_info_old,
|
ZFCP_FSF_PRINT_FMT_SINGLEITEM);
|
zfcp_fsf_scnprint_fc_security(mnemonic_new, sizeof(mnemonic_new),
|
port->connection_info,
|
ZFCP_FSF_PRINT_FMT_SINGLEITEM);
|
|
if (strncmp(mnemonic_old, mnemonic_new,
|
ZFCP_FSF_MAX_FC_SECURITY_MNEMONIC_LENGTH) == 0) {
|
/* no change in string representation, no log */
|
goto out;
|
}
|
|
if (port->connection_info_old == 0) {
|
/* activation */
|
dev_info(&port->adapter->ccw_device->dev,
|
"FC Endpoint Security of connection to remote port 0x%16llx enabled: %s\n",
|
port->wwpn, mnemonic_new);
|
} else if (port->connection_info == 0) {
|
/* deactivation */
|
dev_warn(&port->adapter->ccw_device->dev,
|
"FC Endpoint Security of connection to remote port 0x%16llx disabled: was %s\n",
|
port->wwpn, mnemonic_old);
|
} else {
|
/* change */
|
dev_warn(&port->adapter->ccw_device->dev,
|
"FC Endpoint Security of connection to remote port 0x%16llx changed: from %s to %s\n",
|
port->wwpn, mnemonic_old, mnemonic_new);
|
}
|
|
out:
|
port->connection_info_old = port->connection_info;
|
}
|
|
static void zfcp_fsf_log_security_error(const struct device *dev, u32 fsf_sqw0,
|
u64 wwpn)
|
{
|
switch (fsf_sqw0) {
|
|
/*
|
* Open Port command error codes
|
*/
|
|
case FSF_SQ_SECURITY_REQUIRED:
|
dev_warn_ratelimited(dev,
|
"FC Endpoint Security error: FC security is required but not supported or configured on remote port 0x%016llx\n",
|
wwpn);
|
break;
|
case FSF_SQ_SECURITY_TIMEOUT:
|
dev_warn_ratelimited(dev,
|
"FC Endpoint Security error: a timeout prevented opening remote port 0x%016llx\n",
|
wwpn);
|
break;
|
case FSF_SQ_SECURITY_KM_UNAVAILABLE:
|
dev_warn_ratelimited(dev,
|
"FC Endpoint Security error: opening remote port 0x%016llx failed because local and external key manager cannot communicate\n",
|
wwpn);
|
break;
|
case FSF_SQ_SECURITY_RKM_UNAVAILABLE:
|
dev_warn_ratelimited(dev,
|
"FC Endpoint Security error: opening remote port 0x%016llx failed because it cannot communicate with the external key manager\n",
|
wwpn);
|
break;
|
case FSF_SQ_SECURITY_AUTH_FAILURE:
|
dev_warn_ratelimited(dev,
|
"FC Endpoint Security error: the device could not verify the identity of remote port 0x%016llx\n",
|
wwpn);
|
break;
|
|
/*
|
* Send FCP command error codes
|
*/
|
|
case FSF_SQ_SECURITY_ENC_FAILURE:
|
dev_warn_ratelimited(dev,
|
"FC Endpoint Security error: FC connection to remote port 0x%016llx closed because encryption broke down\n",
|
wwpn);
|
break;
|
|
/*
|
* Unknown error codes
|
*/
|
|
default:
|
dev_warn_ratelimited(dev,
|
"FC Endpoint Security error: the device issued an unknown error code 0x%08x related to the FC connection to remote port 0x%016llx\n",
|
fsf_sqw0, wwpn);
|
}
|
}
|
|
static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
|
{
|
struct zfcp_adapter *adapter = req->adapter;
|
struct zfcp_port *port = req->data;
|
struct fsf_qtcb_header *header = &req->qtcb->header;
|
struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
|
struct fc_els_flogi *plogi;
|
|
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
|
goto out;
|
|
switch (header->fsf_status) {
|
case FSF_PORT_ALREADY_OPEN:
|
break;
|
case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
|
dev_warn(&adapter->ccw_device->dev,
|
"Not enough FCP adapter resources to open "
|
"remote port 0x%016Lx\n",
|
(unsigned long long)port->wwpn);
|
zfcp_erp_set_port_status(port,
|
ZFCP_STATUS_COMMON_ERP_FAILED);
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
case FSF_SECURITY_ERROR:
|
zfcp_fsf_log_security_error(&req->adapter->ccw_device->dev,
|
header->fsf_status_qual.word[0],
|
port->wwpn);
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
case FSF_ADAPTER_STATUS_AVAILABLE:
|
switch (header->fsf_status_qual.word[0]) {
|
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
|
/* no zfcp_fc_test_link() with failed open port */
|
fallthrough;
|
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
|
case FSF_SQ_NO_RETRY_POSSIBLE:
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
}
|
break;
|
case FSF_GOOD:
|
port->handle = header->port_handle;
|
if (adapter->adapter_features & FSF_FEATURE_FC_SECURITY)
|
port->connection_info = bottom->connection_info;
|
else
|
port->connection_info = 0;
|
zfcp_fsf_log_port_fc_security(port, req);
|
atomic_or(ZFCP_STATUS_COMMON_OPEN |
|
ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
|
atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_BOXED,
|
&port->status);
|
/* 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.
|
*/
|
plogi = (struct fc_els_flogi *) bottom->els;
|
if (bottom->els1_length >= FSF_PLOGI_MIN_LEN)
|
zfcp_fc_plogi_evaluate(port, plogi);
|
break;
|
case FSF_UNKNOWN_OP_SUBTYPE:
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
}
|
|
out:
|
put_device(&port->dev);
|
}
|
|
/**
|
* zfcp_fsf_open_port - create and send open port request
|
* @erp_action: pointer to struct zfcp_erp_action
|
* Returns: 0 on success, error otherwise
|
*/
|
int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
|
{
|
struct zfcp_qdio *qdio = erp_action->adapter->qdio;
|
struct zfcp_port *port = erp_action->port;
|
struct zfcp_fsf_req *req;
|
int retval = -EIO;
|
|
spin_lock_irq(&qdio->req_q_lock);
|
if (zfcp_qdio_sbal_get(qdio))
|
goto out;
|
|
req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
|
SBAL_SFLAGS0_TYPE_READ,
|
qdio->adapter->pool.erp_req);
|
|
if (IS_ERR(req)) {
|
retval = PTR_ERR(req);
|
goto out;
|
}
|
|
req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
|
zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
|
|
req->handler = zfcp_fsf_open_port_handler;
|
hton24(req->qtcb->bottom.support.d_id, port->d_id);
|
req->data = port;
|
req->erp_action = erp_action;
|
erp_action->fsf_req_id = req->req_id;
|
get_device(&port->dev);
|
|
zfcp_fsf_start_erp_timer(req);
|
retval = zfcp_fsf_req_send(req);
|
if (retval) {
|
zfcp_fsf_req_free(req);
|
erp_action->fsf_req_id = 0;
|
put_device(&port->dev);
|
}
|
/* NOTE: DO NOT TOUCH req PAST THIS POINT! */
|
out:
|
spin_unlock_irq(&qdio->req_q_lock);
|
return retval;
|
}
|
|
static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
|
{
|
struct zfcp_port *port = req->data;
|
|
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
|
return;
|
|
switch (req->qtcb->header.fsf_status) {
|
case FSF_PORT_HANDLE_NOT_VALID:
|
zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
case FSF_ADAPTER_STATUS_AVAILABLE:
|
break;
|
case FSF_GOOD:
|
zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
|
break;
|
}
|
}
|
|
/**
|
* zfcp_fsf_close_port - create and send close port request
|
* @erp_action: pointer to struct zfcp_erp_action
|
* Returns: 0 on success, error otherwise
|
*/
|
int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
|
{
|
struct zfcp_qdio *qdio = erp_action->adapter->qdio;
|
struct zfcp_fsf_req *req;
|
int retval = -EIO;
|
|
spin_lock_irq(&qdio->req_q_lock);
|
if (zfcp_qdio_sbal_get(qdio))
|
goto out;
|
|
req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
|
SBAL_SFLAGS0_TYPE_READ,
|
qdio->adapter->pool.erp_req);
|
|
if (IS_ERR(req)) {
|
retval = PTR_ERR(req);
|
goto out;
|
}
|
|
req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
|
zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
|
|
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;
|
erp_action->fsf_req_id = req->req_id;
|
|
zfcp_fsf_start_erp_timer(req);
|
retval = zfcp_fsf_req_send(req);
|
if (retval) {
|
zfcp_fsf_req_free(req);
|
erp_action->fsf_req_id = 0;
|
}
|
/* NOTE: DO NOT TOUCH req PAST THIS POINT! */
|
out:
|
spin_unlock_irq(&qdio->req_q_lock);
|
return retval;
|
}
|
|
static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
|
{
|
struct zfcp_fc_wka_port *wka_port = req->data;
|
struct fsf_qtcb_header *header = &req->qtcb->header;
|
|
if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
|
wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
|
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);
|
fallthrough;
|
case FSF_ADAPTER_STATUS_AVAILABLE:
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
|
break;
|
case FSF_GOOD:
|
wka_port->handle = header->port_handle;
|
fallthrough;
|
case FSF_PORT_ALREADY_OPEN:
|
wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
|
}
|
out:
|
wake_up(&wka_port->opened);
|
}
|
|
/**
|
* zfcp_fsf_open_wka_port - create and send open wka-port request
|
* @wka_port: pointer to struct zfcp_fc_wka_port
|
* Returns: 0 on success, error otherwise
|
*/
|
int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
|
{
|
struct zfcp_qdio *qdio = wka_port->adapter->qdio;
|
struct zfcp_fsf_req *req;
|
unsigned long req_id = 0;
|
int retval = -EIO;
|
|
spin_lock_irq(&qdio->req_q_lock);
|
if (zfcp_qdio_sbal_get(qdio))
|
goto out;
|
|
req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
|
SBAL_SFLAGS0_TYPE_READ,
|
qdio->adapter->pool.erp_req);
|
|
if (IS_ERR(req)) {
|
retval = PTR_ERR(req);
|
goto out;
|
}
|
|
req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
|
zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
|
|
req->handler = zfcp_fsf_open_wka_port_handler;
|
hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
|
req->data = wka_port;
|
|
req_id = req->req_id;
|
|
zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
|
retval = zfcp_fsf_req_send(req);
|
if (retval)
|
zfcp_fsf_req_free(req);
|
/* NOTE: DO NOT TOUCH req PAST THIS POINT! */
|
out:
|
spin_unlock_irq(&qdio->req_q_lock);
|
if (!retval)
|
zfcp_dbf_rec_run_wka("fsowp_1", wka_port, req_id);
|
return retval;
|
}
|
|
static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
|
{
|
struct zfcp_fc_wka_port *wka_port = req->data;
|
|
if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
|
}
|
|
wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
|
wake_up(&wka_port->closed);
|
}
|
|
/**
|
* zfcp_fsf_close_wka_port - create and send close wka port request
|
* @wka_port: WKA port to open
|
* Returns: 0 on success, error otherwise
|
*/
|
int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
|
{
|
struct zfcp_qdio *qdio = wka_port->adapter->qdio;
|
struct zfcp_fsf_req *req;
|
unsigned long req_id = 0;
|
int retval = -EIO;
|
|
spin_lock_irq(&qdio->req_q_lock);
|
if (zfcp_qdio_sbal_get(qdio))
|
goto out;
|
|
req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
|
SBAL_SFLAGS0_TYPE_READ,
|
qdio->adapter->pool.erp_req);
|
|
if (IS_ERR(req)) {
|
retval = PTR_ERR(req);
|
goto out;
|
}
|
|
req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
|
zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
|
|
req->handler = zfcp_fsf_close_wka_port_handler;
|
req->data = wka_port;
|
req->qtcb->header.port_handle = wka_port->handle;
|
|
req_id = req->req_id;
|
|
zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
|
retval = zfcp_fsf_req_send(req);
|
if (retval)
|
zfcp_fsf_req_free(req);
|
/* NOTE: DO NOT TOUCH req PAST THIS POINT! */
|
out:
|
spin_unlock_irq(&qdio->req_q_lock);
|
if (!retval)
|
zfcp_dbf_rec_run_wka("fscwp_1", wka_port, req_id);
|
return retval;
|
}
|
|
static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
|
{
|
struct zfcp_port *port = req->data;
|
struct fsf_qtcb_header *header = &req->qtcb->header;
|
struct scsi_device *sdev;
|
|
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
|
return;
|
|
switch (header->fsf_status) {
|
case FSF_PORT_HANDLE_NOT_VALID:
|
zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
case FSF_PORT_BOXED:
|
/* can't use generic zfcp_erp_modify_port_status because
|
* ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
|
atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
|
shost_for_each_device(sdev, port->adapter->scsi_host)
|
if (sdev_to_zfcp(sdev)->port == port)
|
atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
|
&sdev_to_zfcp(sdev)->status);
|
zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
|
zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
|
"fscpph2");
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
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:
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
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_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
|
shost_for_each_device(sdev, port->adapter->scsi_host)
|
if (sdev_to_zfcp(sdev)->port == port)
|
atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
|
&sdev_to_zfcp(sdev)->status);
|
break;
|
}
|
}
|
|
/**
|
* zfcp_fsf_close_physical_port - close physical port
|
* @erp_action: pointer to struct zfcp_erp_action
|
* Returns: 0 on success
|
*/
|
int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
|
{
|
struct zfcp_qdio *qdio = erp_action->adapter->qdio;
|
struct zfcp_fsf_req *req;
|
int retval = -EIO;
|
|
spin_lock_irq(&qdio->req_q_lock);
|
if (zfcp_qdio_sbal_get(qdio))
|
goto out;
|
|
req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
|
SBAL_SFLAGS0_TYPE_READ,
|
qdio->adapter->pool.erp_req);
|
|
if (IS_ERR(req)) {
|
retval = PTR_ERR(req);
|
goto out;
|
}
|
|
req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
|
zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
|
|
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;
|
erp_action->fsf_req_id = req->req_id;
|
|
zfcp_fsf_start_erp_timer(req);
|
retval = zfcp_fsf_req_send(req);
|
if (retval) {
|
zfcp_fsf_req_free(req);
|
erp_action->fsf_req_id = 0;
|
}
|
/* NOTE: DO NOT TOUCH req PAST THIS POINT! */
|
out:
|
spin_unlock_irq(&qdio->req_q_lock);
|
return retval;
|
}
|
|
static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
|
{
|
struct zfcp_adapter *adapter = req->adapter;
|
struct scsi_device *sdev = req->data;
|
struct zfcp_scsi_dev *zfcp_sdev;
|
struct fsf_qtcb_header *header = &req->qtcb->header;
|
union fsf_status_qual *qual = &header->fsf_status_qual;
|
|
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
|
return;
|
|
zfcp_sdev = sdev_to_zfcp(sdev);
|
|
atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_DENIED |
|
ZFCP_STATUS_COMMON_ACCESS_BOXED,
|
&zfcp_sdev->status);
|
|
switch (header->fsf_status) {
|
|
case FSF_PORT_HANDLE_NOT_VALID:
|
zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
|
fallthrough;
|
case FSF_LUN_ALREADY_OPEN:
|
break;
|
case FSF_PORT_BOXED:
|
zfcp_erp_set_port_status(zfcp_sdev->port,
|
ZFCP_STATUS_COMMON_ACCESS_BOXED);
|
zfcp_erp_port_reopen(zfcp_sdev->port,
|
ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
case FSF_LUN_SHARING_VIOLATION:
|
if (qual->word[0])
|
dev_warn(&zfcp_sdev->port->adapter->ccw_device->dev,
|
"LUN 0x%016Lx on port 0x%016Lx is already in "
|
"use by CSS%d, MIF Image ID %x\n",
|
zfcp_scsi_dev_lun(sdev),
|
(unsigned long long)zfcp_sdev->port->wwpn,
|
qual->fsf_queue_designator.cssid,
|
qual->fsf_queue_designator.hla);
|
zfcp_erp_set_lun_status(sdev,
|
ZFCP_STATUS_COMMON_ERP_FAILED |
|
ZFCP_STATUS_COMMON_ACCESS_DENIED);
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
|
dev_warn(&adapter->ccw_device->dev,
|
"No handle is available for LUN "
|
"0x%016Lx on port 0x%016Lx\n",
|
(unsigned long long)zfcp_scsi_dev_lun(sdev),
|
(unsigned long long)zfcp_sdev->port->wwpn);
|
zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
|
fallthrough;
|
case FSF_INVALID_COMMAND_OPTION:
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
case FSF_ADAPTER_STATUS_AVAILABLE:
|
switch (header->fsf_status_qual.word[0]) {
|
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
|
zfcp_fc_test_link(zfcp_sdev->port);
|
fallthrough;
|
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
}
|
break;
|
|
case FSF_GOOD:
|
zfcp_sdev->lun_handle = header->lun_handle;
|
atomic_or(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
|
break;
|
}
|
}
|
|
/**
|
* zfcp_fsf_open_lun - open LUN
|
* @erp_action: pointer to struct zfcp_erp_action
|
* Returns: 0 on success, error otherwise
|
*/
|
int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
|
{
|
struct zfcp_adapter *adapter = erp_action->adapter;
|
struct zfcp_qdio *qdio = adapter->qdio;
|
struct zfcp_fsf_req *req;
|
int retval = -EIO;
|
|
spin_lock_irq(&qdio->req_q_lock);
|
if (zfcp_qdio_sbal_get(qdio))
|
goto out;
|
|
req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
|
SBAL_SFLAGS0_TYPE_READ,
|
adapter->pool.erp_req);
|
|
if (IS_ERR(req)) {
|
retval = PTR_ERR(req);
|
goto out;
|
}
|
|
req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
|
zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
|
|
req->qtcb->header.port_handle = erp_action->port->handle;
|
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;
|
req->erp_action = erp_action;
|
erp_action->fsf_req_id = req->req_id;
|
|
if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
|
req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
|
|
zfcp_fsf_start_erp_timer(req);
|
retval = zfcp_fsf_req_send(req);
|
if (retval) {
|
zfcp_fsf_req_free(req);
|
erp_action->fsf_req_id = 0;
|
}
|
/* NOTE: DO NOT TOUCH req PAST THIS POINT! */
|
out:
|
spin_unlock_irq(&qdio->req_q_lock);
|
return retval;
|
}
|
|
static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
|
{
|
struct scsi_device *sdev = req->data;
|
struct zfcp_scsi_dev *zfcp_sdev;
|
|
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
|
return;
|
|
zfcp_sdev = sdev_to_zfcp(sdev);
|
|
switch (req->qtcb->header.fsf_status) {
|
case FSF_PORT_HANDLE_NOT_VALID:
|
zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
case FSF_LUN_HANDLE_NOT_VALID:
|
zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
case FSF_PORT_BOXED:
|
zfcp_erp_set_port_status(zfcp_sdev->port,
|
ZFCP_STATUS_COMMON_ACCESS_BOXED);
|
zfcp_erp_port_reopen(zfcp_sdev->port,
|
ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
case FSF_ADAPTER_STATUS_AVAILABLE:
|
switch (req->qtcb->header.fsf_status_qual.word[0]) {
|
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
|
zfcp_fc_test_link(zfcp_sdev->port);
|
fallthrough;
|
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
}
|
break;
|
case FSF_GOOD:
|
atomic_andnot(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
|
break;
|
}
|
}
|
|
/**
|
* zfcp_fsf_close_LUN - close LUN
|
* @erp_action: pointer to erp_action triggering the "close LUN"
|
* Returns: 0 on success, error otherwise
|
*/
|
int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
|
{
|
struct zfcp_qdio *qdio = erp_action->adapter->qdio;
|
struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
|
struct zfcp_fsf_req *req;
|
int retval = -EIO;
|
|
spin_lock_irq(&qdio->req_q_lock);
|
if (zfcp_qdio_sbal_get(qdio))
|
goto out;
|
|
req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
|
SBAL_SFLAGS0_TYPE_READ,
|
qdio->adapter->pool.erp_req);
|
|
if (IS_ERR(req)) {
|
retval = PTR_ERR(req);
|
goto out;
|
}
|
|
req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
|
zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
|
|
req->qtcb->header.port_handle = erp_action->port->handle;
|
req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
|
req->handler = zfcp_fsf_close_lun_handler;
|
req->data = erp_action->sdev;
|
req->erp_action = erp_action;
|
erp_action->fsf_req_id = req->req_id;
|
|
zfcp_fsf_start_erp_timer(req);
|
retval = zfcp_fsf_req_send(req);
|
if (retval) {
|
zfcp_fsf_req_free(req);
|
erp_action->fsf_req_id = 0;
|
}
|
/* NOTE: DO NOT TOUCH req PAST THIS POINT! */
|
out:
|
spin_unlock_irq(&qdio->req_q_lock);
|
return retval;
|
}
|
|
static void zfcp_fsf_update_lat(struct zfcp_latency_record *lat_rec, u32 lat)
|
{
|
lat_rec->sum += lat;
|
lat_rec->min = min(lat_rec->min, lat);
|
lat_rec->max = max(lat_rec->max, lat);
|
}
|
|
static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
|
{
|
struct fsf_qual_latency_info *lat_in;
|
struct zfcp_latency_cont *lat = NULL;
|
struct zfcp_scsi_dev *zfcp_sdev;
|
struct zfcp_blk_drv_data blktrc;
|
int ticks = req->adapter->timer_ticks;
|
|
lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
|
|
blktrc.flags = 0;
|
blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
|
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
|
blktrc.flags |= ZFCP_BLK_REQ_ERROR;
|
blktrc.inb_usage = 0;
|
blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
|
|
if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
|
!(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
|
zfcp_sdev = sdev_to_zfcp(scsi->device);
|
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) {
|
case FSF_DATADIR_DIF_READ_STRIP:
|
case FSF_DATADIR_DIF_READ_CONVERT:
|
case FSF_DATADIR_READ:
|
lat = &zfcp_sdev->latencies.read;
|
break;
|
case FSF_DATADIR_DIF_WRITE_INSERT:
|
case FSF_DATADIR_DIF_WRITE_CONVERT:
|
case FSF_DATADIR_WRITE:
|
lat = &zfcp_sdev->latencies.write;
|
break;
|
case FSF_DATADIR_CMND:
|
lat = &zfcp_sdev->latencies.cmd;
|
break;
|
}
|
|
if (lat) {
|
spin_lock(&zfcp_sdev->latencies.lock);
|
zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
|
zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
|
lat->counter++;
|
spin_unlock(&zfcp_sdev->latencies.lock);
|
}
|
}
|
|
blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
|
sizeof(blktrc));
|
}
|
|
/**
|
* zfcp_fsf_fcp_handler_common() - FCP response handler common to I/O and TMF.
|
* @req: Pointer to FSF request.
|
* @sdev: Pointer to SCSI device as request context.
|
*/
|
static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req,
|
struct scsi_device *sdev)
|
{
|
struct zfcp_scsi_dev *zfcp_sdev;
|
struct fsf_qtcb_header *header = &req->qtcb->header;
|
|
if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
|
return;
|
|
zfcp_sdev = sdev_to_zfcp(sdev);
|
|
switch (header->fsf_status) {
|
case FSF_HANDLE_MISMATCH:
|
case FSF_PORT_HANDLE_NOT_VALID:
|
zfcp_erp_adapter_reopen(req->adapter, 0, "fssfch1");
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
case FSF_FCPLUN_NOT_VALID:
|
case FSF_LUN_HANDLE_NOT_VALID:
|
zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
case FSF_SERVICE_CLASS_NOT_SUPPORTED:
|
zfcp_fsf_class_not_supp(req);
|
break;
|
case FSF_DIRECTION_INDICATOR_NOT_VALID:
|
dev_err(&req->adapter->ccw_device->dev,
|
"Incorrect direction %d, LUN 0x%016Lx on port "
|
"0x%016Lx closed\n",
|
req->qtcb->bottom.io.data_direction,
|
(unsigned long long)zfcp_scsi_dev_lun(sdev),
|
(unsigned long long)zfcp_sdev->port->wwpn);
|
zfcp_erp_adapter_shutdown(req->adapter, 0, "fssfch3");
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
case FSF_CMND_LENGTH_NOT_VALID:
|
dev_err(&req->adapter->ccw_device->dev,
|
"Incorrect FCP_CMND length %d, FCP device closed\n",
|
req->qtcb->bottom.io.fcp_cmnd_length);
|
zfcp_erp_adapter_shutdown(req->adapter, 0, "fssfch4");
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
case FSF_PORT_BOXED:
|
zfcp_erp_set_port_status(zfcp_sdev->port,
|
ZFCP_STATUS_COMMON_ACCESS_BOXED);
|
zfcp_erp_port_reopen(zfcp_sdev->port,
|
ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
case FSF_LUN_BOXED:
|
zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
|
zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
|
"fssfch6");
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
case FSF_ADAPTER_STATUS_AVAILABLE:
|
if (header->fsf_status_qual.word[0] ==
|
FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
|
zfcp_fc_test_link(zfcp_sdev->port);
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
case FSF_SECURITY_ERROR:
|
zfcp_fsf_log_security_error(&req->adapter->ccw_device->dev,
|
header->fsf_status_qual.word[0],
|
zfcp_sdev->port->wwpn);
|
zfcp_erp_port_forced_reopen(zfcp_sdev->port, 0, "fssfch7");
|
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
|
break;
|
}
|
}
|
|
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;
|
}
|
|
zfcp_fsf_fcp_handler_common(req, scpnt->device);
|
|
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;
|
}
|
BUILD_BUG_ON(sizeof(struct fcp_resp_with_ext) > FSF_FCP_RSP_SIZE);
|
fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
|
zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
|
|
skip_fsfstatus:
|
zfcp_fsf_req_trace(req, scpnt);
|
zfcp_dbf_scsi_result(scpnt, req);
|
|
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);
|
}
|
|
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;
|
}
|
|
/**
|
* zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
|
* @scsi_cmnd: scsi command to be sent
|
*/
|
int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
|
{
|
struct zfcp_fsf_req *req;
|
struct fcp_cmnd *fcp_cmnd;
|
u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
|
int retval = -EIO;
|
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;
|
struct zfcp_qdio *qdio = adapter->qdio;
|
struct fsf_qtcb_bottom_io *io;
|
unsigned long flags;
|
|
if (unlikely(!(atomic_read(&zfcp_sdev->status) &
|
ZFCP_STATUS_COMMON_UNBLOCKED)))
|
return -EBUSY;
|
|
spin_lock_irqsave(&qdio->req_q_lock, flags);
|
if (atomic_read(&qdio->req_q_free) <= 0) {
|
atomic_inc(&qdio->req_q_full);
|
goto out;
|
}
|
|
if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
|
sbtype = SBAL_SFLAGS0_TYPE_WRITE;
|
|
req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
|
sbtype, adapter->pool.scsi_req);
|
|
if (IS_ERR(req)) {
|
retval = PTR_ERR(req);
|
goto out;
|
}
|
|
scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
|
|
io = &req->qtcb->bottom.io;
|
req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
|
req->data = scsi_cmnd;
|
req->handler = zfcp_fsf_fcp_cmnd_handler;
|
req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
|
req->qtcb->header.port_handle = zfcp_sdev->port->handle;
|
io->service_class = FSF_CLASS_3;
|
io->fcp_cmnd_length = FCP_CMND_LEN;
|
|
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;
|
}
|
|
if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
|
goto failed_scsi_cmnd;
|
|
BUILD_BUG_ON(sizeof(struct fcp_cmnd) > FSF_FCP_CMND_SIZE);
|
fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
|
zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd);
|
|
if ((scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) &&
|
scsi_prot_sg_count(scsi_cmnd)) {
|
zfcp_qdio_set_data_div(qdio, &req->qdio_req,
|
scsi_prot_sg_count(scsi_cmnd));
|
retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
|
scsi_prot_sglist(scsi_cmnd));
|
if (retval)
|
goto failed_scsi_cmnd;
|
io->prot_data_length = zfcp_qdio_real_bytes(
|
scsi_prot_sglist(scsi_cmnd));
|
}
|
|
retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
|
scsi_sglist(scsi_cmnd));
|
if (unlikely(retval))
|
goto failed_scsi_cmnd;
|
|
zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
|
if (zfcp_adapter_multi_buffer_active(adapter))
|
zfcp_qdio_set_scount(qdio, &req->qdio_req);
|
|
retval = zfcp_fsf_req_send(req);
|
if (unlikely(retval))
|
goto failed_scsi_cmnd;
|
/* NOTE: DO NOT TOUCH req PAST THIS POINT! */
|
|
goto out;
|
|
failed_scsi_cmnd:
|
zfcp_fsf_req_free(req);
|
scsi_cmnd->host_scribble = NULL;
|
out:
|
spin_unlock_irqrestore(&qdio->req_q_lock, flags);
|
return retval;
|
}
|
|
static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
|
{
|
struct scsi_device *sdev = req->data;
|
struct fcp_resp_with_ext *fcp_rsp;
|
struct fcp_resp_rsp_info *rsp_info;
|
|
zfcp_fsf_fcp_handler_common(req, sdev);
|
|
fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
|
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;
|
}
|
|
/**
|
* zfcp_fsf_fcp_task_mgmt() - Send SCSI task management command (TMF).
|
* @sdev: Pointer to SCSI device to send the task management command to.
|
* @tm_flags: Unsigned byte for task management flags.
|
*
|
* Return: On success pointer to struct zfcp_fsf_req, %NULL otherwise.
|
*/
|
struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_device *sdev,
|
u8 tm_flags)
|
{
|
struct zfcp_fsf_req *req = NULL;
|
struct fcp_cmnd *fcp_cmnd;
|
struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
|
struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
|
|
if (unlikely(!(atomic_read(&zfcp_sdev->status) &
|
ZFCP_STATUS_COMMON_UNBLOCKED)))
|
return NULL;
|
|
spin_lock_irq(&qdio->req_q_lock);
|
if (zfcp_qdio_sbal_get(qdio))
|
goto out;
|
|
req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
|
SBAL_SFLAGS0_TYPE_WRITE,
|
qdio->adapter->pool.scsi_req);
|
|
if (IS_ERR(req)) {
|
req = NULL;
|
goto out;
|
}
|
|
req->data = sdev;
|
|
req->handler = zfcp_fsf_fcp_task_mgmt_handler;
|
req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
|
req->qtcb->header.port_handle = zfcp_sdev->port->handle;
|
req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
|
req->qtcb->bottom.io.service_class = FSF_CLASS_3;
|
req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
|
|
zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
|
|
fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
|
zfcp_fc_fcp_tm(fcp_cmnd, sdev, tm_flags);
|
|
zfcp_fsf_start_timer(req, ZFCP_FSF_SCSI_ER_TIMEOUT);
|
if (!zfcp_fsf_req_send(req)) {
|
/* NOTE: DO NOT TOUCH req, UNTIL IT COMPLETES! */
|
goto out;
|
}
|
|
zfcp_fsf_req_free(req);
|
req = NULL;
|
out:
|
spin_unlock_irq(&qdio->req_q_lock);
|
return req;
|
}
|
|
/**
|
* zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
|
* @qdio: pointer to struct zfcp_qdio
|
* @sbal_idx: response queue index of SBAL to be processed
|
*/
|
void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
|
{
|
struct zfcp_adapter *adapter = qdio->adapter;
|
struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
|
struct qdio_buffer_element *sbale;
|
struct zfcp_fsf_req *fsf_req;
|
unsigned long req_id;
|
int idx;
|
|
for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
|
|
sbale = &sbal->element[idx];
|
req_id = sbale->addr;
|
fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
|
|
if (!fsf_req) {
|
/*
|
* Unknown request means that we have potentially memory
|
* corruption and must stop the machine immediately.
|
*/
|
zfcp_qdio_siosl(adapter);
|
panic("error: unknown req_id (%lx) on adapter %s.\n",
|
req_id, dev_name(&adapter->ccw_device->dev));
|
}
|
|
zfcp_fsf_req_complete(fsf_req);
|
|
if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
|
break;
|
}
|
}
|
