| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Swen Schillig | 5497 | 46.58% | 36 | 18.75% |
| Christof Schmitt | 2231 | 18.91% | 54 | 28.12% |
| Martin Schwidefsky | 847 | 7.18% | 7 | 3.65% |
| Jens Remus | 787 | 6.67% | 7 | 3.65% |
| Andrew Morton | 728 | 6.17% | 3 | 1.56% |
| Steffen Maier | 490 | 4.15% | 28 | 14.58% |
| Benjamin Block | 299 | 2.53% | 9 | 4.69% |
| Felix Beck | 258 | 2.19% | 1 | 0.52% |
| Andreas Herrmann | 143 | 1.21% | 10 | 5.21% |
| Martin Peschke | 114 | 0.97% | 6 | 3.12% |
| Maxim Shchetynin | 111 | 0.94% | 5 | 2.60% |
| Julian Wiedmann | 105 | 0.89% | 3 | 1.56% |
| Kees Cook | 28 | 0.24% | 1 | 0.52% |
| Martin Petermann | 27 | 0.23% | 2 | 1.04% |
| Stefan Raspl | 25 | 0.21% | 1 | 0.52% |
| Jan Glauber | 21 | 0.18% | 1 | 0.52% |
| Joe Perches | 20 | 0.17% | 1 | 0.52% |
| Sven Schuetz | 18 | 0.15% | 1 | 0.52% |
| Peter Zijlstra | 13 | 0.11% | 1 | 0.52% |
| Daniel Hansel | 10 | 0.08% | 1 | 0.52% |
| Heiko Carstens | 5 | 0.04% | 5 | 2.60% |
| Volker Sameske | 5 | 0.04% | 1 | 0.52% |
| Martin K. Petersen | 4 | 0.03% | 1 | 0.52% |
| Ralph Wuerthner | 3 | 0.03% | 1 | 0.52% |
| Tejun Heo | 3 | 0.03% | 1 | 0.52% |
| Bart Van Assche | 3 | 0.03% | 1 | 0.52% |
| James Bottomley | 2 | 0.02% | 1 | 0.52% |
| Greg Kroah-Hartman | 1 | 0.01% | 1 | 0.52% |
| Corentin Labbe | 1 | 0.01% | 1 | 0.52% |
| Lucas De Marchi | 1 | 0.01% | 1 | 0.52% |
| Total | 11800 | 192 |
// SPDX-License-Identifier: GPL-2.0 /* * zfcp device driver * * Implementation of FSF commands. * * Copyright IBM Corp. 2002, 2020 */ #define KMSG_COMPONENT "zfcp" #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt #include <linux/blktrace_api.h> #include <linux/jiffies.h> #include <linux/types.h> #include <linux/slab.h> #include <scsi/fc/fc_els.h> #include "zfcp_ext.h" #include "zfcp_fc.h" #include "zfcp_dbf.h" #include "zfcp_qdio.h" #include "zfcp_reqlist.h" #include "zfcp_diag.h" /* timeout for FSF requests sent during scsi_eh: abort or FCP TMF */ #define ZFCP_FSF_SCSI_ER_TIMEOUT (10*HZ) /* timeout for: exchange config/port data outside ERP, or open/close WKA port */ #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ) struct kmem_cache *zfcp_fsf_qtcb_cache; static bool ber_stop = true; module_param(ber_stop, bool, 0600); MODULE_PARM_DESC(ber_stop, "Shuts down FCP devices for FCP channels that report a bit-error count in excess of its threshold (default on)"); static void zfcp_fsf_request_timeout_handler(struct timer_list *t) { struct zfcp_fsf_req *fsf_req = from_timer(fsf_req, t, timer); struct zfcp_adapter *adapter = fsf_req->adapter; zfcp_qdio_siosl(adapter); zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, "fsrth_1"); } static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req, unsigned long timeout) { fsf_req->timer.function = zfcp_fsf_request_timeout_handler; fsf_req->timer.expires = jiffies + timeout; add_timer(&fsf_req->timer); } static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req) { BUG_ON(!fsf_req->erp_action); fsf_req->timer.function = zfcp_erp_timeout_handler; fsf_req->timer.expires = jiffies + 30 * HZ; add_timer(&fsf_req->timer); } /* association between FSF command and FSF QTCB type */ static u32 fsf_qtcb_type[] = { [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND, [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND, [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND, [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND, [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND, [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND, [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND, [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND, [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND, [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND, [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND, [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND, [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND }; static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req) { dev_err(&req->adapter->ccw_device->dev, "FCP device not " "operational because of an unsupported FC class\n"); zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1"); req->status |= ZFCP_STATUS_FSFREQ_ERROR; } /** * zfcp_fsf_req_free - free memory used by fsf request * @req: pointer to struct zfcp_fsf_req */ void zfcp_fsf_req_free(struct zfcp_fsf_req *req) { if (likely(req->pool)) { if (likely(!zfcp_fsf_req_is_status_read_buffer(req))) mempool_free(req->qtcb, req->adapter->pool.qtcb_pool); mempool_free(req, req->pool); return; } if (likely(!zfcp_fsf_req_is_status_read_buffer(req))) kmem_cache_free(zfcp_fsf_qtcb_cache, req->qtcb); kfree(req); } static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req) { unsigned long flags; struct fsf_status_read_buffer *sr_buf = req->data; struct zfcp_adapter *adapter = req->adapter; struct zfcp_port *port; int d_id = ntoh24(sr_buf->d_id); read_lock_irqsave(&adapter->port_list_lock, flags); list_for_each_entry(port, &adapter->port_list, list) if (port->d_id == d_id) { zfcp_erp_port_reopen(port, 0, "fssrpc1"); break; } read_unlock_irqrestore(&adapter->port_list_lock, flags); } void zfcp_fsf_fc_host_link_down(struct zfcp_adapter *adapter) { struct Scsi_Host *shost = adapter->scsi_host; adapter->hydra_version = 0; adapter->peer_wwpn = 0; adapter->peer_wwnn = 0; adapter->peer_d_id = 0; /* if there is no shost yet, we have nothing to zero-out */ if (shost == NULL) return; fc_host_port_id(shost) = 0; fc_host_fabric_name(shost) = 0; fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; snprintf(fc_host_model(shost), FC_SYMBOLIC_NAME_SIZE, "0x%04x", 0); memset(fc_host_active_fc4s(shost), 0, FC_FC4_LIST_SIZE); } static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, struct fsf_link_down_info *link_down) { struct zfcp_adapter *adapter = req->adapter; if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) return; atomic_or(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status); zfcp_scsi_schedule_rports_block(adapter); zfcp_fsf_fc_host_link_down(adapter); if (!link_down) goto out; switch (link_down->error_code) { case FSF_PSQ_LINK_NO_LIGHT: dev_warn(&req->adapter->ccw_device->dev, "There is no light signal from the local " "fibre channel cable\n"); break; case FSF_PSQ_LINK_WRAP_PLUG: dev_warn(&req->adapter->ccw_device->dev, "There is a wrap plug instead of a fibre " "channel cable\n"); break; case FSF_PSQ_LINK_NO_FCP: dev_warn(&req->adapter->ccw_device->dev, "The adjacent fibre channel node does not " "support FCP\n"); break; case FSF_PSQ_LINK_FIRMWARE_UPDATE: dev_warn(&req->adapter->ccw_device->dev, "The FCP device is suspended because of a " "firmware update\n"); break; case FSF_PSQ_LINK_INVALID_WWPN: dev_warn(&req->adapter->ccw_device->dev, "The FCP device detected a WWPN that is " "duplicate or not valid\n"); break; case FSF_PSQ_LINK_NO_NPIV_SUPPORT: dev_warn(&req->adapter->ccw_device->dev, "The fibre channel fabric does not support NPIV\n"); break; case FSF_PSQ_LINK_NO_FCP_RESOURCES: dev_warn(&req->adapter->ccw_device->dev, "The FCP adapter cannot support more NPIV ports\n"); break; case FSF_PSQ_LINK_NO_FABRIC_RESOURCES: dev_warn(&req->adapter->ccw_device->dev, "The adjacent switch cannot support " "more NPIV ports\n"); break; case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE: dev_warn(&req->adapter->ccw_device->dev, "The FCP adapter could not log in to the " "fibre channel fabric\n"); break; case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED: dev_warn(&req->adapter->ccw_device->dev, "The WWPN assignment file on the FCP adapter " "has been damaged\n"); break; case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED: dev_warn(&req->adapter->ccw_device->dev, "The mode table on the FCP adapter " "has been damaged\n"); break; case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT: dev_warn(&req->adapter->ccw_device->dev, "All NPIV ports on the FCP adapter have " "been assigned\n"); break; default: dev_warn(&req->adapter->ccw_device->dev, "The link between the FCP adapter and " "the FC fabric is down\n"); } out: zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED); } static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req) { struct fsf_status_read_buffer *sr_buf = req->data; struct fsf_link_down_info *ldi = (struct fsf_link_down_info *) &sr_buf->payload; switch (sr_buf->status_subtype) { case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK: case FSF_STATUS_READ_SUB_FDISC_FAILED: zfcp_fsf_link_down_info_eval(req, ldi); break; case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE: zfcp_fsf_link_down_info_eval(req, NULL); } } static void zfcp_fsf_status_read_version_change(struct zfcp_adapter *adapter, struct fsf_status_read_buffer *sr_buf) { if (sr_buf->status_subtype == FSF_STATUS_READ_SUB_LIC_CHANGE) { u32 version = sr_buf->payload.version_change.current_version; WRITE_ONCE(adapter->fsf_lic_version, version); snprintf(fc_host_firmware_version(adapter->scsi_host), FC_VERSION_STRING_SIZE, "%#08x", version); } } static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req) { struct zfcp_adapter *adapter = req->adapter; struct fsf_status_read_buffer *sr_buf = req->data; if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { zfcp_dbf_hba_fsf_uss("fssrh_1", req); mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data); zfcp_fsf_req_free(req); return; } zfcp_dbf_hba_fsf_uss("fssrh_4", req); switch (sr_buf->status_type) { case FSF_STATUS_READ_PORT_CLOSED: zfcp_fsf_status_read_port_closed(req); break; case FSF_STATUS_READ_INCOMING_ELS: zfcp_fc_incoming_els(req); break; case FSF_STATUS_READ_SENSE_DATA_AVAIL: break; case FSF_STATUS_READ_BIT_ERROR_THRESHOLD: zfcp_dbf_hba_bit_err("fssrh_3", req); if (ber_stop) { dev_warn(&adapter->ccw_device->dev, "All paths over this FCP device are disused because of excessive bit errors\n"); zfcp_erp_adapter_shutdown(adapter, 0, "fssrh_b"); } else { dev_warn(&adapter->ccw_device->dev, "The error threshold for checksum statistics has been exceeded\n"); } break; case FSF_STATUS_READ_LINK_DOWN: zfcp_fsf_status_read_link_down(req); zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKDOWN, 0); break; case FSF_STATUS_READ_LINK_UP: dev_info(&adapter->ccw_device->dev, "The local link has been restored\n"); /* All ports should be marked as ready to run again */ zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING); zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | ZFCP_STATUS_COMMON_ERP_FAILED, "fssrh_2"); zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKUP, 0); break; case FSF_STATUS_READ_NOTIFICATION_LOST: if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS) zfcp_fc_conditional_port_scan(adapter); if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_VERSION_CHANGE) queue_work(adapter->work_queue, &adapter->version_change_lost_work); break; case FSF_STATUS_READ_FEATURE_UPDATE_ALERT: adapter->adapter_features = sr_buf->payload.word[0]; break; case FSF_STATUS_READ_VERSION_CHANGE: zfcp_fsf_status_read_version_change(adapter, sr_buf); break; } mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data); zfcp_fsf_req_free(req); atomic_inc(&adapter->stat_miss); queue_work(adapter->work_queue, &adapter->stat_work); } static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req) { switch (req->qtcb->header.fsf_status_qual.word[0]) { case FSF_SQ_FCP_RSP_AVAILABLE: case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: case FSF_SQ_NO_RETRY_POSSIBLE: case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: return; case FSF_SQ_COMMAND_ABORTED: break; case FSF_SQ_NO_RECOM: dev_err(&req->adapter->ccw_device->dev, "The FCP adapter reported a problem " "that cannot be recovered\n"); zfcp_qdio_siosl(req->adapter); zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1"); break; } /* all non-return stats set FSFREQ_ERROR*/ req->status |= ZFCP_STATUS_FSFREQ_ERROR; } static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req) { if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) return; switch (req->qtcb->header.fsf_status) { case FSF_UNKNOWN_COMMAND: dev_err(&req->adapter->ccw_device->dev, "The FCP adapter does not recognize the command 0x%x\n", req->qtcb->header.fsf_command); zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1"); req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; case FSF_ADAPTER_STATUS_AVAILABLE: zfcp_fsf_fsfstatus_qual_eval(req); break; } } static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req) { struct zfcp_adapter *adapter = req->adapter; struct fsf_qtcb *qtcb = req->qtcb; union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual; zfcp_dbf_hba_fsf_response(req); if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { req->status |= ZFCP_STATUS_FSFREQ_ERROR; return; } switch (qtcb->prefix.prot_status) { case FSF_PROT_GOOD: case FSF_PROT_FSF_STATUS_PRESENTED: return; case FSF_PROT_QTCB_VERSION_ERROR: dev_err(&adapter->ccw_device->dev, "QTCB version 0x%x not supported by FCP adapter " "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION, psq->word[0], psq->word[1]); zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1"); break; case FSF_PROT_ERROR_STATE: case FSF_PROT_SEQ_NUMB_ERROR: zfcp_erp_adapter_reopen(adapter, 0, "fspse_2"); req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; case FSF_PROT_UNSUPP_QTCB_TYPE: dev_err(&adapter->ccw_device->dev, "The QTCB type is not supported by the FCP adapter\n"); zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3"); break; case FSF_PROT_HOST_CONNECTION_INITIALIZING: atomic_or(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, &adapter->status); break; case FSF_PROT_DUPLICATE_REQUEST_ID: dev_err(&adapter->ccw_device->dev, "0x%Lx is an ambiguous request identifier\n", (unsigned long long)qtcb->bottom.support.req_handle); zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4"); break; case FSF_PROT_LINK_DOWN: zfcp_fsf_link_down_info_eval(req, &psq->link_down_info); /* go through reopen to flush pending requests */ zfcp_erp_adapter_reopen(adapter, 0, "fspse_6"); break; case FSF_PROT_REEST_QUEUE: /* All ports should be marked as ready to run again */ zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING); zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | ZFCP_STATUS_COMMON_ERP_FAILED, "fspse_8"); break; default: dev_err(&adapter->ccw_device->dev, "0x%x is not a valid transfer protocol status\n", qtcb->prefix.prot_status); zfcp_qdio_siosl(adapter); zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9"); } req->status |= ZFCP_STATUS_FSFREQ_ERROR; } /** * 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(). */ 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++; 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; int 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->completion_wq); } /** * 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->completion_wq); } /** * 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_cmd_to_rq(scsi), &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_prot_interval(scsi_cmnd); io->ref_tag_value = scsi_prot_ref_tag(scsi_cmnd); } 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; } }
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