| /* |
| * zfcp device driver |
| * |
| * Interface to Linux SCSI midlayer. |
| * |
| * Copyright IBM Corp. 2002, 2017 |
| */ |
| |
| #define KMSG_COMPONENT "zfcp" |
| #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
| |
| #include <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/slab.h> |
| #include <scsi/fc/fc_fcp.h> |
| #include <scsi/scsi_eh.h> |
| #include <linux/atomic.h> |
| #include "zfcp_ext.h" |
| #include "zfcp_dbf.h" |
| #include "zfcp_fc.h" |
| #include "zfcp_reqlist.h" |
| |
| static unsigned int default_depth = 32; |
| module_param_named(queue_depth, default_depth, uint, 0600); |
| MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices"); |
| |
| static bool enable_dif; |
| module_param_named(dif, enable_dif, bool, 0400); |
| MODULE_PARM_DESC(dif, "Enable DIF/DIX data integrity support"); |
| |
| static bool allow_lun_scan = true; |
| module_param(allow_lun_scan, bool, 0600); |
| MODULE_PARM_DESC(allow_lun_scan, "For NPIV, scan and attach all storage LUNs"); |
| |
| static void zfcp_scsi_slave_destroy(struct scsi_device *sdev) |
| { |
| struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
| |
| /* if previous slave_alloc returned early, there is nothing to do */ |
| if (!zfcp_sdev->port) |
| return; |
| |
| zfcp_erp_lun_shutdown_wait(sdev, "scssd_1"); |
| put_device(&zfcp_sdev->port->dev); |
| } |
| |
| static int zfcp_scsi_slave_configure(struct scsi_device *sdp) |
| { |
| if (sdp->tagged_supported) |
| scsi_change_queue_depth(sdp, default_depth); |
| return 0; |
| } |
| |
| static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) |
| { |
| set_host_byte(scpnt, result); |
| zfcp_dbf_scsi_fail_send(scpnt); |
| scpnt->scsi_done(scpnt); |
| } |
| |
| static |
| int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt) |
| { |
| struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
| struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device)); |
| int status, scsi_result, ret; |
| |
| /* reset the status for this request */ |
| scpnt->result = 0; |
| scpnt->host_scribble = NULL; |
| |
| scsi_result = fc_remote_port_chkready(rport); |
| if (unlikely(scsi_result)) { |
| scpnt->result = scsi_result; |
| zfcp_dbf_scsi_fail_send(scpnt); |
| scpnt->scsi_done(scpnt); |
| return 0; |
| } |
| |
| status = atomic_read(&zfcp_sdev->status); |
| if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) && |
| !(atomic_read(&zfcp_sdev->port->status) & |
| ZFCP_STATUS_COMMON_ERP_FAILED)) { |
| /* only LUN access denied, but port is good |
| * not covered by FC transport, have to fail here */ |
| zfcp_scsi_command_fail(scpnt, DID_ERROR); |
| return 0; |
| } |
| |
| if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) { |
| /* This could be |
| * call to rport_delete pending: mimic retry from |
| * fc_remote_port_chkready until rport is BLOCKED |
| */ |
| zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY); |
| return 0; |
| } |
| |
| ret = zfcp_fsf_fcp_cmnd(scpnt); |
| if (unlikely(ret == -EBUSY)) |
| return SCSI_MLQUEUE_DEVICE_BUSY; |
| else if (unlikely(ret < 0)) |
| return SCSI_MLQUEUE_HOST_BUSY; |
| |
| return ret; |
| } |
| |
| static int zfcp_scsi_slave_alloc(struct scsi_device *sdev) |
| { |
| struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| struct zfcp_adapter *adapter = |
| (struct zfcp_adapter *) sdev->host->hostdata[0]; |
| struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
| struct zfcp_port *port; |
| struct zfcp_unit *unit; |
| int npiv = adapter->connection_features & FSF_FEATURE_NPIV_MODE; |
| |
| port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
| if (!port) |
| return -ENXIO; |
| |
| unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev)); |
| if (unit) |
| put_device(&unit->dev); |
| |
| if (!unit && !(allow_lun_scan && npiv)) { |
| put_device(&port->dev); |
| return -ENXIO; |
| } |
| |
| zfcp_sdev->port = port; |
| zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF; |
| zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF; |
| zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF; |
| zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF; |
| zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF; |
| zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF; |
| spin_lock_init(&zfcp_sdev->latencies.lock); |
| |
| zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING); |
| zfcp_erp_lun_reopen(sdev, 0, "scsla_1"); |
| zfcp_erp_wait(port->adapter); |
| |
| return 0; |
| } |
| |
| static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) |
| { |
| struct Scsi_Host *scsi_host = scpnt->device->host; |
| struct zfcp_adapter *adapter = |
| (struct zfcp_adapter *) scsi_host->hostdata[0]; |
| struct zfcp_fsf_req *old_req, *abrt_req; |
| unsigned long flags; |
| unsigned long old_reqid = (unsigned long) scpnt->host_scribble; |
| int retval = SUCCESS, ret; |
| int retry = 3; |
| char *dbf_tag; |
| |
| /* avoid race condition between late normal completion and abort */ |
| write_lock_irqsave(&adapter->abort_lock, flags); |
| |
| old_req = zfcp_reqlist_find(adapter->req_list, old_reqid); |
| if (!old_req) { |
| write_unlock_irqrestore(&adapter->abort_lock, flags); |
| zfcp_dbf_scsi_abort("abrt_or", scpnt, NULL); |
| return FAILED; /* completion could be in progress */ |
| } |
| old_req->data = NULL; |
| |
| /* don't access old fsf_req after releasing the abort_lock */ |
| write_unlock_irqrestore(&adapter->abort_lock, flags); |
| |
| while (retry--) { |
| abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt); |
| if (abrt_req) |
| break; |
| |
| zfcp_erp_wait(adapter); |
| ret = fc_block_scsi_eh(scpnt); |
| if (ret) { |
| zfcp_dbf_scsi_abort("abrt_bl", scpnt, NULL); |
| return ret; |
| } |
| if (!(atomic_read(&adapter->status) & |
| ZFCP_STATUS_COMMON_RUNNING)) { |
| zfcp_dbf_scsi_abort("abrt_ru", scpnt, NULL); |
| return SUCCESS; |
| } |
| } |
| if (!abrt_req) { |
| zfcp_dbf_scsi_abort("abrt_ar", scpnt, NULL); |
| return FAILED; |
| } |
| |
| wait_for_completion(&abrt_req->completion); |
| |
| if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) |
| dbf_tag = "abrt_ok"; |
| else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) |
| dbf_tag = "abrt_nn"; |
| else { |
| dbf_tag = "abrt_fa"; |
| retval = FAILED; |
| } |
| zfcp_dbf_scsi_abort(dbf_tag, scpnt, abrt_req); |
| zfcp_fsf_req_free(abrt_req); |
| return retval; |
| } |
| |
| struct zfcp_scsi_req_filter { |
| u8 tmf_scope; |
| u32 lun_handle; |
| u32 port_handle; |
| }; |
| |
| static void zfcp_scsi_forget_cmnd(struct zfcp_fsf_req *old_req, void *data) |
| { |
| struct zfcp_scsi_req_filter *filter = |
| (struct zfcp_scsi_req_filter *)data; |
| |
| /* already aborted - prevent side-effects - or not a SCSI command */ |
| if (old_req->data == NULL || old_req->fsf_command != FSF_QTCB_FCP_CMND) |
| return; |
| |
| /* (tmf_scope == FCP_TMF_TGT_RESET || tmf_scope == FCP_TMF_LUN_RESET) */ |
| if (old_req->qtcb->header.port_handle != filter->port_handle) |
| return; |
| |
| if (filter->tmf_scope == FCP_TMF_LUN_RESET && |
| old_req->qtcb->header.lun_handle != filter->lun_handle) |
| return; |
| |
| zfcp_dbf_scsi_nullcmnd((struct scsi_cmnd *)old_req->data, old_req); |
| old_req->data = NULL; |
| } |
| |
| static void zfcp_scsi_forget_cmnds(struct zfcp_scsi_dev *zsdev, u8 tm_flags) |
| { |
| struct zfcp_adapter *adapter = zsdev->port->adapter; |
| struct zfcp_scsi_req_filter filter = { |
| .tmf_scope = FCP_TMF_TGT_RESET, |
| .port_handle = zsdev->port->handle, |
| }; |
| unsigned long flags; |
| |
| if (tm_flags == FCP_TMF_LUN_RESET) { |
| filter.tmf_scope = FCP_TMF_LUN_RESET; |
| filter.lun_handle = zsdev->lun_handle; |
| } |
| |
| /* |
| * abort_lock secures against other processings - in the abort-function |
| * and normal cmnd-handler - of (struct zfcp_fsf_req *)->data |
| */ |
| write_lock_irqsave(&adapter->abort_lock, flags); |
| zfcp_reqlist_apply_for_all(adapter->req_list, zfcp_scsi_forget_cmnd, |
| &filter); |
| write_unlock_irqrestore(&adapter->abort_lock, flags); |
| } |
| |
| static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) |
| { |
| struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
| struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; |
| struct zfcp_fsf_req *fsf_req = NULL; |
| int retval = SUCCESS, ret; |
| int retry = 3; |
| |
| while (retry--) { |
| fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags); |
| if (fsf_req) |
| break; |
| |
| zfcp_erp_wait(adapter); |
| ret = fc_block_scsi_eh(scpnt); |
| if (ret) { |
| zfcp_dbf_scsi_devreset("fiof", scpnt, tm_flags, NULL); |
| return ret; |
| } |
| |
| if (!(atomic_read(&adapter->status) & |
| ZFCP_STATUS_COMMON_RUNNING)) { |
| zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags, NULL); |
| return SUCCESS; |
| } |
| } |
| if (!fsf_req) { |
| zfcp_dbf_scsi_devreset("reqf", scpnt, tm_flags, NULL); |
| return FAILED; |
| } |
| |
| wait_for_completion(&fsf_req->completion); |
| |
| if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { |
| zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags, fsf_req); |
| retval = FAILED; |
| } else { |
| zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags, fsf_req); |
| zfcp_scsi_forget_cmnds(zfcp_sdev, tm_flags); |
| } |
| |
| zfcp_fsf_req_free(fsf_req); |
| return retval; |
| } |
| |
| static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) |
| { |
| return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET); |
| } |
| |
| static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) |
| { |
| return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET); |
| } |
| |
| static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) |
| { |
| struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
| struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; |
| int ret; |
| |
| zfcp_erp_adapter_reopen(adapter, 0, "schrh_1"); |
| zfcp_erp_wait(adapter); |
| ret = fc_block_scsi_eh(scpnt); |
| if (ret) |
| return ret; |
| |
| return SUCCESS; |
| } |
| |
| struct scsi_transport_template *zfcp_scsi_transport_template; |
| |
| static struct scsi_host_template zfcp_scsi_host_template = { |
| .module = THIS_MODULE, |
| .name = "zfcp", |
| .queuecommand = zfcp_scsi_queuecommand, |
| .eh_timed_out = fc_eh_timed_out, |
| .eh_abort_handler = zfcp_scsi_eh_abort_handler, |
| .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, |
| .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, |
| .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, |
| .slave_alloc = zfcp_scsi_slave_alloc, |
| .slave_configure = zfcp_scsi_slave_configure, |
| .slave_destroy = zfcp_scsi_slave_destroy, |
| .change_queue_depth = scsi_change_queue_depth, |
| .proc_name = "zfcp", |
| .can_queue = 4096, |
| .this_id = -1, |
| .sg_tablesize = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1) |
| * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2), |
| /* GCD, adjusted later */ |
| .max_sectors = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1) |
| * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2) * 8, |
| /* GCD, adjusted later */ |
| .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1, |
| .use_clustering = 1, |
| .shost_attrs = zfcp_sysfs_shost_attrs, |
| .sdev_attrs = zfcp_sysfs_sdev_attrs, |
| .track_queue_depth = 1, |
| }; |
| |
| /** |
| * zfcp_scsi_adapter_register - Register SCSI and FC host with SCSI midlayer |
| * @adapter: The zfcp adapter to register with the SCSI midlayer |
| */ |
| int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter) |
| { |
| struct ccw_dev_id dev_id; |
| |
| if (adapter->scsi_host) |
| return 0; |
| |
| ccw_device_get_id(adapter->ccw_device, &dev_id); |
| /* register adapter as SCSI host with mid layer of SCSI stack */ |
| adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template, |
| sizeof (struct zfcp_adapter *)); |
| if (!adapter->scsi_host) { |
| dev_err(&adapter->ccw_device->dev, |
| "Registering the FCP device with the " |
| "SCSI stack failed\n"); |
| return -EIO; |
| } |
| |
| /* tell the SCSI stack some characteristics of this adapter */ |
| adapter->scsi_host->max_id = 511; |
| adapter->scsi_host->max_lun = 0xFFFFFFFF; |
| adapter->scsi_host->max_channel = 0; |
| adapter->scsi_host->unique_id = dev_id.devno; |
| adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */ |
| adapter->scsi_host->transportt = zfcp_scsi_transport_template; |
| |
| adapter->scsi_host->hostdata[0] = (unsigned long) adapter; |
| |
| if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { |
| scsi_host_put(adapter->scsi_host); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * zfcp_scsi_adapter_unregister - Unregister SCSI and FC host from SCSI midlayer |
| * @adapter: The zfcp adapter to unregister. |
| */ |
| void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter) |
| { |
| struct Scsi_Host *shost; |
| struct zfcp_port *port; |
| |
| shost = adapter->scsi_host; |
| if (!shost) |
| return; |
| |
| read_lock_irq(&adapter->port_list_lock); |
| list_for_each_entry(port, &adapter->port_list, list) |
| port->rport = NULL; |
| read_unlock_irq(&adapter->port_list_lock); |
| |
| fc_remove_host(shost); |
| scsi_remove_host(shost); |
| scsi_host_put(shost); |
| adapter->scsi_host = NULL; |
| } |
| |
| static struct fc_host_statistics* |
| zfcp_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_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_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_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_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) { |
| kfree(data); |
| return NULL; |
| } |
| |
| if (adapter->stats_reset && |
| ((jiffies/HZ - adapter->stats_reset) < |
| data->seconds_since_last_reset)) |
| zfcp_adjust_fc_host_stats(fc_stats, data, |
| adapter->stats_reset_data); |
| else |
| zfcp_set_fc_host_stats(fc_stats, data); |
| |
| kfree(data); |
| return fc_stats; |
| } |
| |
| static void zfcp_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) |
| 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_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_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); |
| } |
| } |
| |
| 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("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("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); |
| |
| 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 && |
| adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1) |
| mask |= SHOST_DIF_TYPE1_PROTECTION; |
| |
| if (enable_dif && 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); |
| } |
| |
| 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, |
| .get_fc_host_stats = zfcp_get_fc_host_stats, |
| .reset_fc_host_stats = zfcp_reset_fc_host_stats, |
| .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, |
| .get_host_port_state = zfcp_get_host_port_state, |
| .terminate_rport_io = zfcp_scsi_terminate_rport_io, |
| .show_host_port_state = 1, |
| .show_host_active_fc4s = 1, |
| .bsg_request = zfcp_fc_exec_bsg_job, |
| .bsg_timeout = zfcp_fc_timeout_bsg_job, |
| /* no functions registered for following dynamic attributes but |
| directly set by LLDD */ |
| .show_host_port_type = 1, |
| .show_host_symbolic_name = 1, |
| .show_host_speed = 1, |
| .show_host_port_id = 1, |
| .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els), |
| }; |