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991 lines
29 KiB
991 lines
29 KiB
// 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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* Interface to Linux SCSI midlayer. |
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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/module.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_fcp.h> |
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#include <scsi/scsi_eh.h> |
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#include <linux/atomic.h> |
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#include "zfcp_ext.h" |
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#include "zfcp_dbf.h" |
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#include "zfcp_fc.h" |
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#include "zfcp_reqlist.h" |
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static unsigned int default_depth = 32; |
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module_param_named(queue_depth, default_depth, uint, 0600); |
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MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices"); |
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static bool enable_dif; |
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module_param_named(dif, enable_dif, bool, 0400); |
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MODULE_PARM_DESC(dif, "Enable DIF data integrity support (default off)"); |
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bool zfcp_experimental_dix; |
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module_param_named(dix, zfcp_experimental_dix, bool, 0400); |
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MODULE_PARM_DESC(dix, "Enable experimental DIX (data integrity extension) support which implies DIF support (default off)"); |
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static bool allow_lun_scan = true; |
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module_param(allow_lun_scan, bool, 0600); |
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MODULE_PARM_DESC(allow_lun_scan, "For NPIV, scan and attach all storage LUNs"); |
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static void zfcp_scsi_slave_destroy(struct scsi_device *sdev) |
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{ |
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struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
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/* if previous slave_alloc returned early, there is nothing to do */ |
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if (!zfcp_sdev->port) |
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return; |
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zfcp_erp_lun_shutdown_wait(sdev, "scssd_1"); |
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put_device(&zfcp_sdev->port->dev); |
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} |
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static int zfcp_scsi_slave_configure(struct scsi_device *sdp) |
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{ |
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if (sdp->tagged_supported) |
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scsi_change_queue_depth(sdp, default_depth); |
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return 0; |
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} |
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static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) |
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{ |
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set_host_byte(scpnt, result); |
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zfcp_dbf_scsi_fail_send(scpnt); |
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scpnt->scsi_done(scpnt); |
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} |
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static |
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int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt) |
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{ |
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struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
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struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device)); |
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int status, scsi_result, ret; |
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/* reset the status for this request */ |
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scpnt->result = 0; |
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scpnt->host_scribble = NULL; |
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scsi_result = fc_remote_port_chkready(rport); |
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if (unlikely(scsi_result)) { |
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scpnt->result = scsi_result; |
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zfcp_dbf_scsi_fail_send(scpnt); |
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scpnt->scsi_done(scpnt); |
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return 0; |
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} |
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status = atomic_read(&zfcp_sdev->status); |
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if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) && |
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!(atomic_read(&zfcp_sdev->port->status) & |
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ZFCP_STATUS_COMMON_ERP_FAILED)) { |
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/* only LUN access denied, but port is good |
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* not covered by FC transport, have to fail here */ |
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zfcp_scsi_command_fail(scpnt, DID_ERROR); |
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return 0; |
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} |
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if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) { |
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/* This could be |
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* call to rport_delete pending: mimic retry from |
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* fc_remote_port_chkready until rport is BLOCKED |
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*/ |
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zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY); |
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return 0; |
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} |
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ret = zfcp_fsf_fcp_cmnd(scpnt); |
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if (unlikely(ret == -EBUSY)) |
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return SCSI_MLQUEUE_DEVICE_BUSY; |
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else if (unlikely(ret < 0)) |
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return SCSI_MLQUEUE_HOST_BUSY; |
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return ret; |
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} |
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static int zfcp_scsi_slave_alloc(struct scsi_device *sdev) |
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{ |
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struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
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struct zfcp_adapter *adapter = |
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(struct zfcp_adapter *) sdev->host->hostdata[0]; |
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struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
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struct zfcp_port *port; |
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struct zfcp_unit *unit; |
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int npiv = adapter->connection_features & FSF_FEATURE_NPIV_MODE; |
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zfcp_sdev->erp_action.adapter = adapter; |
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zfcp_sdev->erp_action.sdev = sdev; |
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port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
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if (!port) |
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return -ENXIO; |
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zfcp_sdev->erp_action.port = port; |
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mutex_lock(&zfcp_sysfs_port_units_mutex); |
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if (zfcp_sysfs_port_is_removing(port)) { |
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/* port is already gone */ |
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mutex_unlock(&zfcp_sysfs_port_units_mutex); |
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put_device(&port->dev); /* undo zfcp_get_port_by_wwpn() */ |
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return -ENXIO; |
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} |
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mutex_unlock(&zfcp_sysfs_port_units_mutex); |
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unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev)); |
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if (unit) |
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put_device(&unit->dev); |
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if (!unit && !(allow_lun_scan && npiv)) { |
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put_device(&port->dev); |
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return -ENXIO; |
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} |
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zfcp_sdev->port = port; |
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zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF; |
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zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF; |
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zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF; |
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zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF; |
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zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF; |
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zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF; |
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spin_lock_init(&zfcp_sdev->latencies.lock); |
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zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING); |
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zfcp_erp_lun_reopen(sdev, 0, "scsla_1"); |
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zfcp_erp_wait(port->adapter); |
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return 0; |
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} |
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static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) |
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{ |
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struct Scsi_Host *scsi_host = scpnt->device->host; |
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struct zfcp_adapter *adapter = |
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(struct zfcp_adapter *) scsi_host->hostdata[0]; |
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struct zfcp_fsf_req *old_req, *abrt_req; |
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unsigned long flags; |
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unsigned long old_reqid = (unsigned long) scpnt->host_scribble; |
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int retval = SUCCESS, ret; |
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int retry = 3; |
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char *dbf_tag; |
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/* avoid race condition between late normal completion and abort */ |
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write_lock_irqsave(&adapter->abort_lock, flags); |
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old_req = zfcp_reqlist_find(adapter->req_list, old_reqid); |
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if (!old_req) { |
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write_unlock_irqrestore(&adapter->abort_lock, flags); |
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zfcp_dbf_scsi_abort("abrt_or", scpnt, NULL); |
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return FAILED; /* completion could be in progress */ |
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} |
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old_req->data = NULL; |
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/* don't access old fsf_req after releasing the abort_lock */ |
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write_unlock_irqrestore(&adapter->abort_lock, flags); |
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while (retry--) { |
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abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt); |
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if (abrt_req) |
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break; |
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zfcp_dbf_scsi_abort("abrt_wt", scpnt, NULL); |
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zfcp_erp_wait(adapter); |
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ret = fc_block_scsi_eh(scpnt); |
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if (ret) { |
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zfcp_dbf_scsi_abort("abrt_bl", scpnt, NULL); |
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return ret; |
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} |
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if (!(atomic_read(&adapter->status) & |
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ZFCP_STATUS_COMMON_RUNNING)) { |
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zfcp_dbf_scsi_abort("abrt_ru", scpnt, NULL); |
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return SUCCESS; |
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} |
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} |
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if (!abrt_req) { |
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zfcp_dbf_scsi_abort("abrt_ar", scpnt, NULL); |
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return FAILED; |
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} |
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wait_for_completion(&abrt_req->completion); |
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if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) |
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dbf_tag = "abrt_ok"; |
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else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) |
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dbf_tag = "abrt_nn"; |
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else { |
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dbf_tag = "abrt_fa"; |
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retval = FAILED; |
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} |
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zfcp_dbf_scsi_abort(dbf_tag, scpnt, abrt_req); |
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zfcp_fsf_req_free(abrt_req); |
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return retval; |
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} |
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struct zfcp_scsi_req_filter { |
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u8 tmf_scope; |
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u32 lun_handle; |
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u32 port_handle; |
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}; |
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static void zfcp_scsi_forget_cmnd(struct zfcp_fsf_req *old_req, void *data) |
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{ |
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struct zfcp_scsi_req_filter *filter = |
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(struct zfcp_scsi_req_filter *)data; |
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/* already aborted - prevent side-effects - or not a SCSI command */ |
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if (old_req->data == NULL || |
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zfcp_fsf_req_is_status_read_buffer(old_req) || |
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old_req->qtcb->header.fsf_command != FSF_QTCB_FCP_CMND) |
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return; |
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/* (tmf_scope == FCP_TMF_TGT_RESET || tmf_scope == FCP_TMF_LUN_RESET) */ |
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if (old_req->qtcb->header.port_handle != filter->port_handle) |
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return; |
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if (filter->tmf_scope == FCP_TMF_LUN_RESET && |
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old_req->qtcb->header.lun_handle != filter->lun_handle) |
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return; |
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zfcp_dbf_scsi_nullcmnd((struct scsi_cmnd *)old_req->data, old_req); |
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old_req->data = NULL; |
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} |
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static void zfcp_scsi_forget_cmnds(struct zfcp_scsi_dev *zsdev, u8 tm_flags) |
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{ |
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struct zfcp_adapter *adapter = zsdev->port->adapter; |
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struct zfcp_scsi_req_filter filter = { |
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.tmf_scope = FCP_TMF_TGT_RESET, |
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.port_handle = zsdev->port->handle, |
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}; |
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unsigned long flags; |
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if (tm_flags == FCP_TMF_LUN_RESET) { |
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filter.tmf_scope = FCP_TMF_LUN_RESET; |
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filter.lun_handle = zsdev->lun_handle; |
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} |
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/* |
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* abort_lock secures against other processings - in the abort-function |
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* and normal cmnd-handler - of (struct zfcp_fsf_req *)->data |
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*/ |
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write_lock_irqsave(&adapter->abort_lock, flags); |
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zfcp_reqlist_apply_for_all(adapter->req_list, zfcp_scsi_forget_cmnd, |
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&filter); |
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write_unlock_irqrestore(&adapter->abort_lock, flags); |
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} |
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/** |
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* zfcp_scsi_task_mgmt_function() - Send a task management function (sync). |
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* @sdev: Pointer to SCSI device to send the task management command to. |
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* @tm_flags: Task management flags, |
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* here we only handle %FCP_TMF_TGT_RESET or %FCP_TMF_LUN_RESET. |
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*/ |
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static int zfcp_scsi_task_mgmt_function(struct scsi_device *sdev, u8 tm_flags) |
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{ |
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struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
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struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; |
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struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
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struct zfcp_fsf_req *fsf_req = NULL; |
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int retval = SUCCESS, ret; |
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int retry = 3; |
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while (retry--) { |
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fsf_req = zfcp_fsf_fcp_task_mgmt(sdev, tm_flags); |
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if (fsf_req) |
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break; |
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zfcp_dbf_scsi_devreset("wait", sdev, tm_flags, NULL); |
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zfcp_erp_wait(adapter); |
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ret = fc_block_rport(rport); |
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if (ret) { |
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zfcp_dbf_scsi_devreset("fiof", sdev, tm_flags, NULL); |
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return ret; |
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} |
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if (!(atomic_read(&adapter->status) & |
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ZFCP_STATUS_COMMON_RUNNING)) { |
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zfcp_dbf_scsi_devreset("nres", sdev, tm_flags, NULL); |
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return SUCCESS; |
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} |
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} |
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if (!fsf_req) { |
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zfcp_dbf_scsi_devreset("reqf", sdev, tm_flags, NULL); |
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return FAILED; |
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} |
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wait_for_completion(&fsf_req->completion); |
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if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { |
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zfcp_dbf_scsi_devreset("fail", sdev, tm_flags, fsf_req); |
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retval = FAILED; |
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} else { |
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zfcp_dbf_scsi_devreset("okay", sdev, tm_flags, fsf_req); |
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zfcp_scsi_forget_cmnds(zfcp_sdev, tm_flags); |
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} |
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zfcp_fsf_req_free(fsf_req); |
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return retval; |
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} |
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static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) |
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{ |
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struct scsi_device *sdev = scpnt->device; |
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return zfcp_scsi_task_mgmt_function(sdev, FCP_TMF_LUN_RESET); |
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} |
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static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) |
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{ |
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struct scsi_target *starget = scsi_target(scpnt->device); |
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struct fc_rport *rport = starget_to_rport(starget); |
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struct Scsi_Host *shost = rport_to_shost(rport); |
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struct scsi_device *sdev = NULL, *tmp_sdev; |
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struct zfcp_adapter *adapter = |
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(struct zfcp_adapter *)shost->hostdata[0]; |
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int ret; |
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shost_for_each_device(tmp_sdev, shost) { |
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if (tmp_sdev->id == starget->id) { |
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sdev = tmp_sdev; |
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break; |
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} |
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} |
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if (!sdev) { |
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ret = FAILED; |
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zfcp_dbf_scsi_eh("tr_nosd", adapter, starget->id, ret); |
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return ret; |
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} |
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ret = zfcp_scsi_task_mgmt_function(sdev, FCP_TMF_TGT_RESET); |
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/* release reference from above shost_for_each_device */ |
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if (sdev) |
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scsi_device_put(tmp_sdev); |
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return ret; |
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} |
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static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) |
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{ |
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struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
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struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; |
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int ret = SUCCESS, fc_ret; |
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if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE)) { |
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zfcp_erp_port_forced_reopen_all(adapter, 0, "schrh_p"); |
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zfcp_erp_wait(adapter); |
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} |
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zfcp_erp_adapter_reopen(adapter, 0, "schrh_1"); |
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zfcp_erp_wait(adapter); |
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fc_ret = fc_block_scsi_eh(scpnt); |
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if (fc_ret) |
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ret = fc_ret; |
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zfcp_dbf_scsi_eh("schrh_r", adapter, ~0, ret); |
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return ret; |
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} |
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/** |
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* zfcp_scsi_sysfs_host_reset() - Support scsi_host sysfs attribute host_reset. |
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* @shost: Pointer to Scsi_Host to perform action on. |
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* @reset_type: We support %SCSI_ADAPTER_RESET but not %SCSI_FIRMWARE_RESET. |
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* |
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* Return: 0 on %SCSI_ADAPTER_RESET, -%EOPNOTSUPP otherwise. |
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* |
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* This is similar to zfcp_sysfs_adapter_failed_store(). |
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*/ |
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static int zfcp_scsi_sysfs_host_reset(struct Scsi_Host *shost, int reset_type) |
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{ |
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struct zfcp_adapter *adapter = |
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(struct zfcp_adapter *)shost->hostdata[0]; |
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int ret = 0; |
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if (reset_type != SCSI_ADAPTER_RESET) { |
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ret = -EOPNOTSUPP; |
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zfcp_dbf_scsi_eh("scshr_n", adapter, ~0, ret); |
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return ret; |
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} |
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zfcp_erp_adapter_reset_sync(adapter, "scshr_y"); |
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return ret; |
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} |
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struct scsi_transport_template *zfcp_scsi_transport_template; |
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static struct scsi_host_template zfcp_scsi_host_template = { |
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.module = THIS_MODULE, |
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.name = "zfcp", |
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.queuecommand = zfcp_scsi_queuecommand, |
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.eh_timed_out = fc_eh_timed_out, |
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.eh_abort_handler = zfcp_scsi_eh_abort_handler, |
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.eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, |
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.eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, |
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.eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, |
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.slave_alloc = zfcp_scsi_slave_alloc, |
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.slave_configure = zfcp_scsi_slave_configure, |
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.slave_destroy = zfcp_scsi_slave_destroy, |
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.change_queue_depth = scsi_change_queue_depth, |
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.host_reset = zfcp_scsi_sysfs_host_reset, |
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.proc_name = "zfcp", |
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.can_queue = 4096, |
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.this_id = -1, |
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.sg_tablesize = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1) |
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* ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2), |
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/* GCD, adjusted later */ |
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.max_sectors = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1) |
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* ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2) * 8, |
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/* GCD, adjusted later */ |
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/* report size limit per scatter-gather segment */ |
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.max_segment_size = ZFCP_QDIO_SBALE_LEN, |
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.dma_boundary = ZFCP_QDIO_SBALE_LEN - 1, |
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.shost_attrs = zfcp_sysfs_shost_attrs, |
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.sdev_attrs = zfcp_sysfs_sdev_attrs, |
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.track_queue_depth = 1, |
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.supported_mode = MODE_INITIATOR, |
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}; |
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/** |
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* zfcp_scsi_adapter_register() - Allocate and register SCSI and FC host with |
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* SCSI midlayer |
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* @adapter: The zfcp adapter to register with the SCSI midlayer |
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* |
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* Allocates the SCSI host object for the given adapter, sets basic properties |
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* (such as the transport template, QDIO limits, ...), and registers it with |
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* the midlayer. |
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* |
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* During registration with the midlayer the corresponding FC host object for |
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* the referenced transport class is also implicitely allocated. |
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* |
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* Upon success adapter->scsi_host is set, and upon failure it remains NULL. If |
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* adapter->scsi_host is already set, nothing is done. |
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* |
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* Return: |
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* * 0 - Allocation and registration was successful |
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* * -EEXIST - SCSI and FC host did already exist, nothing was done, nothing |
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* was changed |
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* * -EIO - Allocation or registration failed |
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*/ |
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int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter) |
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{ |
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struct ccw_dev_id dev_id; |
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|
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if (adapter->scsi_host) |
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return -EEXIST; |
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ccw_device_get_id(adapter->ccw_device, &dev_id); |
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/* register adapter as SCSI host with mid layer of SCSI stack */ |
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adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template, |
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sizeof (struct zfcp_adapter *)); |
|
if (!adapter->scsi_host) |
|
goto err_out; |
|
|
|
/* tell the SCSI stack some characteristics of this adapter */ |
|
adapter->scsi_host->max_id = 511; |
|
adapter->scsi_host->max_lun = 0xFFFFFFFF; |
|
adapter->scsi_host->max_channel = 0; |
|
adapter->scsi_host->unique_id = dev_id.devno; |
|
adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */ |
|
adapter->scsi_host->transportt = zfcp_scsi_transport_template; |
|
|
|
/* make all basic properties known at registration time */ |
|
zfcp_qdio_shost_update(adapter, adapter->qdio); |
|
zfcp_scsi_set_prot(adapter); |
|
|
|
adapter->scsi_host->hostdata[0] = (unsigned long) adapter; |
|
|
|
if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { |
|
scsi_host_put(adapter->scsi_host); |
|
goto err_out; |
|
} |
|
|
|
return 0; |
|
err_out: |
|
adapter->scsi_host = NULL; |
|
dev_err(&adapter->ccw_device->dev, |
|
"Registering the FCP device with the SCSI stack failed\n"); |
|
return -EIO; |
|
} |
|
|
|
/** |
|
* zfcp_scsi_adapter_unregister - Unregister SCSI and FC host from SCSI midlayer |
|
* @adapter: The zfcp adapter to unregister. |
|
*/ |
|
void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter) |
|
{ |
|
struct Scsi_Host *shost; |
|
struct zfcp_port *port; |
|
|
|
shost = adapter->scsi_host; |
|
if (!shost) |
|
return; |
|
|
|
read_lock_irq(&adapter->port_list_lock); |
|
list_for_each_entry(port, &adapter->port_list, list) |
|
port->rport = NULL; |
|
read_unlock_irq(&adapter->port_list_lock); |
|
|
|
fc_remove_host(shost); |
|
scsi_remove_host(shost); |
|
scsi_host_put(shost); |
|
adapter->scsi_host = NULL; |
|
} |
|
|
|
static struct fc_host_statistics* |
|
zfcp_scsi_init_fc_host_stats(struct zfcp_adapter *adapter) |
|
{ |
|
struct fc_host_statistics *fc_stats; |
|
|
|
if (!adapter->fc_stats) { |
|
fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); |
|
if (!fc_stats) |
|
return NULL; |
|
adapter->fc_stats = fc_stats; /* freed in adapter_release */ |
|
} |
|
memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); |
|
return adapter->fc_stats; |
|
} |
|
|
|
static void zfcp_scsi_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, |
|
struct fsf_qtcb_bottom_port *data, |
|
struct fsf_qtcb_bottom_port *old) |
|
{ |
|
fc_stats->seconds_since_last_reset = |
|
data->seconds_since_last_reset - old->seconds_since_last_reset; |
|
fc_stats->tx_frames = data->tx_frames - old->tx_frames; |
|
fc_stats->tx_words = data->tx_words - old->tx_words; |
|
fc_stats->rx_frames = data->rx_frames - old->rx_frames; |
|
fc_stats->rx_words = data->rx_words - old->rx_words; |
|
fc_stats->lip_count = data->lip - old->lip; |
|
fc_stats->nos_count = data->nos - old->nos; |
|
fc_stats->error_frames = data->error_frames - old->error_frames; |
|
fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; |
|
fc_stats->link_failure_count = data->link_failure - old->link_failure; |
|
fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; |
|
fc_stats->loss_of_signal_count = |
|
data->loss_of_signal - old->loss_of_signal; |
|
fc_stats->prim_seq_protocol_err_count = |
|
data->psp_error_counts - old->psp_error_counts; |
|
fc_stats->invalid_tx_word_count = |
|
data->invalid_tx_words - old->invalid_tx_words; |
|
fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; |
|
fc_stats->fcp_input_requests = |
|
data->input_requests - old->input_requests; |
|
fc_stats->fcp_output_requests = |
|
data->output_requests - old->output_requests; |
|
fc_stats->fcp_control_requests = |
|
data->control_requests - old->control_requests; |
|
fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; |
|
fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; |
|
} |
|
|
|
static void zfcp_scsi_set_fc_host_stats(struct fc_host_statistics *fc_stats, |
|
struct fsf_qtcb_bottom_port *data) |
|
{ |
|
fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; |
|
fc_stats->tx_frames = data->tx_frames; |
|
fc_stats->tx_words = data->tx_words; |
|
fc_stats->rx_frames = data->rx_frames; |
|
fc_stats->rx_words = data->rx_words; |
|
fc_stats->lip_count = data->lip; |
|
fc_stats->nos_count = data->nos; |
|
fc_stats->error_frames = data->error_frames; |
|
fc_stats->dumped_frames = data->dumped_frames; |
|
fc_stats->link_failure_count = data->link_failure; |
|
fc_stats->loss_of_sync_count = data->loss_of_sync; |
|
fc_stats->loss_of_signal_count = data->loss_of_signal; |
|
fc_stats->prim_seq_protocol_err_count = data->psp_error_counts; |
|
fc_stats->invalid_tx_word_count = data->invalid_tx_words; |
|
fc_stats->invalid_crc_count = data->invalid_crcs; |
|
fc_stats->fcp_input_requests = data->input_requests; |
|
fc_stats->fcp_output_requests = data->output_requests; |
|
fc_stats->fcp_control_requests = data->control_requests; |
|
fc_stats->fcp_input_megabytes = data->input_mb; |
|
fc_stats->fcp_output_megabytes = data->output_mb; |
|
} |
|
|
|
static struct fc_host_statistics * |
|
zfcp_scsi_get_fc_host_stats(struct Scsi_Host *host) |
|
{ |
|
struct zfcp_adapter *adapter; |
|
struct fc_host_statistics *fc_stats; |
|
struct fsf_qtcb_bottom_port *data; |
|
int ret; |
|
|
|
adapter = (struct zfcp_adapter *)host->hostdata[0]; |
|
fc_stats = zfcp_scsi_init_fc_host_stats(adapter); |
|
if (!fc_stats) |
|
return NULL; |
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL); |
|
if (!data) |
|
return NULL; |
|
|
|
ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
|
if (ret != 0 && ret != -EAGAIN) { |
|
kfree(data); |
|
return NULL; |
|
} |
|
|
|
if (adapter->stats_reset && |
|
((jiffies/HZ - adapter->stats_reset) < |
|
data->seconds_since_last_reset)) |
|
zfcp_scsi_adjust_fc_host_stats(fc_stats, data, |
|
adapter->stats_reset_data); |
|
else |
|
zfcp_scsi_set_fc_host_stats(fc_stats, data); |
|
|
|
kfree(data); |
|
return fc_stats; |
|
} |
|
|
|
static void zfcp_scsi_reset_fc_host_stats(struct Scsi_Host *shost) |
|
{ |
|
struct zfcp_adapter *adapter; |
|
struct fsf_qtcb_bottom_port *data; |
|
int ret; |
|
|
|
adapter = (struct zfcp_adapter *)shost->hostdata[0]; |
|
data = kzalloc(sizeof(*data), GFP_KERNEL); |
|
if (!data) |
|
return; |
|
|
|
ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
|
if (ret != 0 && ret != -EAGAIN) |
|
kfree(data); |
|
else { |
|
adapter->stats_reset = jiffies/HZ; |
|
kfree(adapter->stats_reset_data); |
|
adapter->stats_reset_data = data; /* finally freed in |
|
adapter_release */ |
|
} |
|
} |
|
|
|
static void zfcp_scsi_get_host_port_state(struct Scsi_Host *shost) |
|
{ |
|
struct zfcp_adapter *adapter = |
|
(struct zfcp_adapter *)shost->hostdata[0]; |
|
int status = atomic_read(&adapter->status); |
|
|
|
if ((status & ZFCP_STATUS_COMMON_RUNNING) && |
|
!(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) |
|
fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; |
|
else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) |
|
fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; |
|
else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) |
|
fc_host_port_state(shost) = FC_PORTSTATE_ERROR; |
|
else |
|
fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; |
|
} |
|
|
|
static void zfcp_scsi_set_rport_dev_loss_tmo(struct fc_rport *rport, |
|
u32 timeout) |
|
{ |
|
rport->dev_loss_tmo = timeout; |
|
} |
|
|
|
/** |
|
* zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport |
|
* @rport: The FC rport where to teminate I/O |
|
* |
|
* Abort all pending SCSI commands for a port by closing the |
|
* port. Using a reopen avoids a conflict with a shutdown |
|
* overwriting a reopen. The "forced" ensures that a disappeared port |
|
* is not opened again as valid due to the cached plogi data in |
|
* non-NPIV mode. |
|
*/ |
|
static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport) |
|
{ |
|
struct zfcp_port *port; |
|
struct Scsi_Host *shost = rport_to_shost(rport); |
|
struct zfcp_adapter *adapter = |
|
(struct zfcp_adapter *)shost->hostdata[0]; |
|
|
|
port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
|
|
|
if (port) { |
|
zfcp_erp_port_forced_reopen(port, 0, "sctrpi1"); |
|
put_device(&port->dev); |
|
} else { |
|
zfcp_erp_port_forced_no_port_dbf( |
|
"sctrpin", adapter, |
|
rport->port_name /* zfcp_scsi_rport_register */, |
|
rport->port_id /* zfcp_scsi_rport_register */); |
|
} |
|
} |
|
|
|
static void zfcp_scsi_rport_register(struct zfcp_port *port) |
|
{ |
|
struct fc_rport_identifiers ids; |
|
struct fc_rport *rport; |
|
|
|
if (port->rport) |
|
return; |
|
|
|
ids.node_name = port->wwnn; |
|
ids.port_name = port->wwpn; |
|
ids.port_id = port->d_id; |
|
ids.roles = FC_RPORT_ROLE_FCP_TARGET; |
|
|
|
zfcp_dbf_rec_trig_lock("scpaddy", port->adapter, port, NULL, |
|
ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD, |
|
ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD); |
|
rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); |
|
if (!rport) { |
|
dev_err(&port->adapter->ccw_device->dev, |
|
"Registering port 0x%016Lx failed\n", |
|
(unsigned long long)port->wwpn); |
|
return; |
|
} |
|
|
|
rport->maxframe_size = port->maxframe_size; |
|
rport->supported_classes = port->supported_classes; |
|
port->rport = rport; |
|
port->starget_id = rport->scsi_target_id; |
|
|
|
zfcp_unit_queue_scsi_scan(port); |
|
} |
|
|
|
static void zfcp_scsi_rport_block(struct zfcp_port *port) |
|
{ |
|
struct fc_rport *rport = port->rport; |
|
|
|
if (rport) { |
|
zfcp_dbf_rec_trig_lock("scpdely", port->adapter, port, NULL, |
|
ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL, |
|
ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL); |
|
fc_remote_port_delete(rport); |
|
port->rport = NULL; |
|
} |
|
} |
|
|
|
void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) |
|
{ |
|
get_device(&port->dev); |
|
port->rport_task = RPORT_ADD; |
|
|
|
if (!queue_work(port->adapter->work_queue, &port->rport_work)) |
|
put_device(&port->dev); |
|
} |
|
|
|
void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) |
|
{ |
|
get_device(&port->dev); |
|
port->rport_task = RPORT_DEL; |
|
|
|
if (port->rport && queue_work(port->adapter->work_queue, |
|
&port->rport_work)) |
|
return; |
|
|
|
put_device(&port->dev); |
|
} |
|
|
|
void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter) |
|
{ |
|
unsigned long flags; |
|
struct zfcp_port *port; |
|
|
|
read_lock_irqsave(&adapter->port_list_lock, flags); |
|
list_for_each_entry(port, &adapter->port_list, list) |
|
zfcp_scsi_schedule_rport_block(port); |
|
read_unlock_irqrestore(&adapter->port_list_lock, flags); |
|
} |
|
|
|
void zfcp_scsi_rport_work(struct work_struct *work) |
|
{ |
|
struct zfcp_port *port = container_of(work, struct zfcp_port, |
|
rport_work); |
|
|
|
set_worker_desc("zrp%c-%16llx", |
|
(port->rport_task == RPORT_ADD) ? 'a' : 'd', |
|
port->wwpn); /* < WORKER_DESC_LEN=24 */ |
|
while (port->rport_task) { |
|
if (port->rport_task == RPORT_ADD) { |
|
port->rport_task = RPORT_NONE; |
|
zfcp_scsi_rport_register(port); |
|
} else { |
|
port->rport_task = RPORT_NONE; |
|
zfcp_scsi_rport_block(port); |
|
} |
|
} |
|
|
|
put_device(&port->dev); |
|
} |
|
|
|
/** |
|
* zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host |
|
* @adapter: The adapter where to configure DIF/DIX for the SCSI host |
|
*/ |
|
void zfcp_scsi_set_prot(struct zfcp_adapter *adapter) |
|
{ |
|
unsigned int mask = 0; |
|
unsigned int data_div; |
|
struct Scsi_Host *shost = adapter->scsi_host; |
|
|
|
data_div = atomic_read(&adapter->status) & |
|
ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED; |
|
|
|
if ((enable_dif || zfcp_experimental_dix) && |
|
adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1) |
|
mask |= SHOST_DIF_TYPE1_PROTECTION; |
|
|
|
if (zfcp_experimental_dix && data_div && |
|
adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) { |
|
mask |= SHOST_DIX_TYPE1_PROTECTION; |
|
scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP); |
|
shost->sg_prot_tablesize = adapter->qdio->max_sbale_per_req / 2; |
|
shost->sg_tablesize = adapter->qdio->max_sbale_per_req / 2; |
|
shost->max_sectors = shost->sg_tablesize * 8; |
|
} |
|
|
|
scsi_host_set_prot(shost, mask); |
|
} |
|
|
|
/** |
|
* zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error |
|
* @scmd: The SCSI command to report the error for |
|
* @ascq: The ASCQ to put in the sense buffer |
|
* |
|
* See the error handling in sd_done for the sense codes used here. |
|
* Set DID_SOFT_ERROR to retry the request, if possible. |
|
*/ |
|
void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq) |
|
{ |
|
scsi_build_sense_buffer(1, scmd->sense_buffer, |
|
ILLEGAL_REQUEST, 0x10, ascq); |
|
set_driver_byte(scmd, DRIVER_SENSE); |
|
scmd->result |= SAM_STAT_CHECK_CONDITION; |
|
set_host_byte(scmd, DID_SOFT_ERROR); |
|
} |
|
|
|
void zfcp_scsi_shost_update_config_data( |
|
struct zfcp_adapter *const adapter, |
|
const struct fsf_qtcb_bottom_config *const bottom, |
|
const bool bottom_incomplete) |
|
{ |
|
struct Scsi_Host *const shost = adapter->scsi_host; |
|
const struct fc_els_flogi *nsp, *plogi; |
|
|
|
if (shost == NULL) |
|
return; |
|
|
|
snprintf(fc_host_firmware_version(shost), FC_VERSION_STRING_SIZE, |
|
"0x%08x", bottom->lic_version); |
|
|
|
if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) { |
|
snprintf(fc_host_hardware_version(shost), |
|
FC_VERSION_STRING_SIZE, |
|
"0x%08x", bottom->hardware_version); |
|
memcpy(fc_host_serial_number(shost), bottom->serial_number, |
|
min(FC_SERIAL_NUMBER_SIZE, 17)); |
|
EBCASC(fc_host_serial_number(shost), |
|
min(FC_SERIAL_NUMBER_SIZE, 17)); |
|
} |
|
|
|
/* adjust pointers for missing command code */ |
|
nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param |
|
- sizeof(u32)); |
|
plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload |
|
- sizeof(u32)); |
|
|
|
snprintf(fc_host_manufacturer(shost), FC_SERIAL_NUMBER_SIZE, "%s", |
|
"IBM"); |
|
fc_host_port_name(shost) = be64_to_cpu(nsp->fl_wwpn); |
|
fc_host_node_name(shost) = be64_to_cpu(nsp->fl_wwnn); |
|
fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3; |
|
|
|
zfcp_scsi_set_prot(adapter); |
|
|
|
/* do not evaluate invalid fields */ |
|
if (bottom_incomplete) |
|
return; |
|
|
|
fc_host_port_id(shost) = ntoh24(bottom->s_id); |
|
fc_host_speed(shost) = |
|
zfcp_fsf_convert_portspeed(bottom->fc_link_speed); |
|
|
|
snprintf(fc_host_model(shost), FC_SYMBOLIC_NAME_SIZE, "0x%04x", |
|
bottom->adapter_type); |
|
|
|
switch (bottom->fc_topology) { |
|
case FSF_TOPO_P2P: |
|
fc_host_port_type(shost) = FC_PORTTYPE_PTP; |
|
fc_host_fabric_name(shost) = 0; |
|
break; |
|
case FSF_TOPO_FABRIC: |
|
fc_host_fabric_name(shost) = be64_to_cpu(plogi->fl_wwnn); |
|
if (bottom->connection_features & FSF_FEATURE_NPIV_MODE) |
|
fc_host_port_type(shost) = FC_PORTTYPE_NPIV; |
|
else |
|
fc_host_port_type(shost) = FC_PORTTYPE_NPORT; |
|
break; |
|
case FSF_TOPO_AL: |
|
fc_host_port_type(shost) = FC_PORTTYPE_NLPORT; |
|
fallthrough; |
|
default: |
|
fc_host_fabric_name(shost) = 0; |
|
break; |
|
} |
|
} |
|
|
|
void zfcp_scsi_shost_update_port_data( |
|
struct zfcp_adapter *const adapter, |
|
const struct fsf_qtcb_bottom_port *const bottom) |
|
{ |
|
struct Scsi_Host *const shost = adapter->scsi_host; |
|
|
|
if (shost == NULL) |
|
return; |
|
|
|
fc_host_permanent_port_name(shost) = bottom->wwpn; |
|
fc_host_maxframe_size(shost) = bottom->maximum_frame_size; |
|
fc_host_supported_speeds(shost) = |
|
zfcp_fsf_convert_portspeed(bottom->supported_speed); |
|
memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types, |
|
FC_FC4_LIST_SIZE); |
|
memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types, |
|
FC_FC4_LIST_SIZE); |
|
} |
|
|
|
struct fc_function_template zfcp_transport_functions = { |
|
.show_starget_port_id = 1, |
|
.show_starget_port_name = 1, |
|
.show_starget_node_name = 1, |
|
.show_rport_supported_classes = 1, |
|
.show_rport_maxframe_size = 1, |
|
.show_rport_dev_loss_tmo = 1, |
|
.show_host_node_name = 1, |
|
.show_host_port_name = 1, |
|
.show_host_permanent_port_name = 1, |
|
.show_host_supported_classes = 1, |
|
.show_host_supported_fc4s = 1, |
|
.show_host_supported_speeds = 1, |
|
.show_host_maxframe_size = 1, |
|
.show_host_serial_number = 1, |
|
.show_host_manufacturer = 1, |
|
.show_host_model = 1, |
|
.show_host_hardware_version = 1, |
|
.show_host_firmware_version = 1, |
|
.get_fc_host_stats = zfcp_scsi_get_fc_host_stats, |
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.reset_fc_host_stats = zfcp_scsi_reset_fc_host_stats, |
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.set_rport_dev_loss_tmo = zfcp_scsi_set_rport_dev_loss_tmo, |
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.get_host_port_state = zfcp_scsi_get_host_port_state, |
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.terminate_rport_io = zfcp_scsi_terminate_rport_io, |
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.show_host_port_state = 1, |
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.show_host_active_fc4s = 1, |
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.bsg_request = zfcp_fc_exec_bsg_job, |
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.bsg_timeout = zfcp_fc_timeout_bsg_job, |
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/* no functions registered for following dynamic attributes but |
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directly set by LLDD */ |
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.show_host_port_type = 1, |
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.show_host_symbolic_name = 1, |
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.show_host_speed = 1, |
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.show_host_port_id = 1, |
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.show_host_fabric_name = 1, |
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.dd_bsg_size = sizeof(struct zfcp_fsf_ct_els), |
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};
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