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- // 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_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);
- break;
- case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
- adapter->adapter_features = sr_buf->payload.word[0];
- 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++;
- INIT_LIST_HEAD(&req->list);
- timer_setup(&req->timer, NULL, 0);
- init_completion(&req->completion);
- req->adapter = adapter;
- req->req_id = adapter->req_no;
- if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
- if (likely(pool))
- req->qtcb = zfcp_fsf_qtcb_alloc(
- adapter->pool.qtcb_pool);
- else
- req->qtcb = zfcp_fsf_qtcb_alloc(NULL);
- if (unlikely(!req->qtcb)) {
- zfcp_fsf_req_free(req);
- return ERR_PTR(-ENOMEM);
- }
- req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
- req->qtcb->prefix.req_id = req->req_id;
- req->qtcb->prefix.ulp_info = 26;
- req->qtcb->prefix.qtcb_type = fsf_qtcb_type[fsf_cmd];
- req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
- req->qtcb->header.req_handle = req->req_id;
- req->qtcb->header.fsf_command = fsf_cmd;
- }
- zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
- req->qtcb, sizeof(struct fsf_qtcb));
- return req;
- }
- static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
- {
- const bool is_srb = zfcp_fsf_req_is_status_read_buffer(req);
- struct zfcp_adapter *adapter = req->adapter;
- struct zfcp_qdio *qdio = adapter->qdio;
- 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->request->q, scsi->request, &blktrc,
- sizeof(blktrc));
- }
- /**
- * zfcp_fsf_fcp_handler_common() - FCP response handler common to I/O and TMF.
- * @req: Pointer to FSF request.
- * @sdev: Pointer to SCSI device as request context.
- */
- static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req,
- struct scsi_device *sdev)
- {
- struct zfcp_scsi_dev *zfcp_sdev;
- struct fsf_qtcb_header *header = &req->qtcb->header;
- if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
- return;
- zfcp_sdev = sdev_to_zfcp(sdev);
- switch (header->fsf_status) {
- case FSF_HANDLE_MISMATCH:
- case FSF_PORT_HANDLE_NOT_VALID:
- zfcp_erp_adapter_reopen(req->adapter, 0, "fssfch1");
- req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
- case FSF_FCPLUN_NOT_VALID:
- case FSF_LUN_HANDLE_NOT_VALID:
- zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
- req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
- case FSF_SERVICE_CLASS_NOT_SUPPORTED:
- zfcp_fsf_class_not_supp(req);
- break;
- case FSF_DIRECTION_INDICATOR_NOT_VALID:
- dev_err(&req->adapter->ccw_device->dev,
- "Incorrect direction %d, LUN 0x%016Lx on port "
- "0x%016Lx closed\n",
- req->qtcb->bottom.io.data_direction,
- (unsigned long long)zfcp_scsi_dev_lun(sdev),
- (unsigned long long)zfcp_sdev->port->wwpn);
- zfcp_erp_adapter_shutdown(req->adapter, 0, "fssfch3");
- req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
- case FSF_CMND_LENGTH_NOT_VALID:
- dev_err(&req->adapter->ccw_device->dev,
- "Incorrect FCP_CMND length %d, FCP device closed\n",
- req->qtcb->bottom.io.fcp_cmnd_length);
- zfcp_erp_adapter_shutdown(req->adapter, 0, "fssfch4");
- req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
- case FSF_PORT_BOXED:
- zfcp_erp_set_port_status(zfcp_sdev->port,
- ZFCP_STATUS_COMMON_ACCESS_BOXED);
- zfcp_erp_port_reopen(zfcp_sdev->port,
- ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
- req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
- case FSF_LUN_BOXED:
- zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
- zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
- "fssfch6");
- req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
- case FSF_ADAPTER_STATUS_AVAILABLE:
- if (header->fsf_status_qual.word[0] ==
- FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
- zfcp_fc_test_link(zfcp_sdev->port);
- req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
- case FSF_SECURITY_ERROR:
- zfcp_fsf_log_security_error(&req->adapter->ccw_device->dev,
- header->fsf_status_qual.word[0],
- zfcp_sdev->port->wwpn);
- zfcp_erp_port_forced_reopen(zfcp_sdev->port, 0, "fssfch7");
- req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
- }
- }
- static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
- {
- struct scsi_cmnd *scpnt;
- struct fcp_resp_with_ext *fcp_rsp;
- unsigned long flags;
- read_lock_irqsave(&req->adapter->abort_lock, flags);
- scpnt = req->data;
- if (unlikely(!scpnt)) {
- read_unlock_irqrestore(&req->adapter->abort_lock, flags);
- return;
- }
- zfcp_fsf_fcp_handler_common(req, scpnt->device);
- if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
- set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
- goto skip_fsfstatus;
- }
- switch (req->qtcb->header.fsf_status) {
- case FSF_INCONSISTENT_PROT_DATA:
- case FSF_INVALID_PROT_PARM:
- set_host_byte(scpnt, DID_ERROR);
- goto skip_fsfstatus;
- case FSF_BLOCK_GUARD_CHECK_FAILURE:
- zfcp_scsi_dif_sense_error(scpnt, 0x1);
- goto skip_fsfstatus;
- case FSF_APP_TAG_CHECK_FAILURE:
- zfcp_scsi_dif_sense_error(scpnt, 0x2);
- goto skip_fsfstatus;
- case FSF_REF_TAG_CHECK_FAILURE:
- zfcp_scsi_dif_sense_error(scpnt, 0x3);
- goto skip_fsfstatus;
- }
- BUILD_BUG_ON(sizeof(struct fcp_resp_with_ext) > FSF_FCP_RSP_SIZE);
- fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
- zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
- skip_fsfstatus:
- zfcp_fsf_req_trace(req, scpnt);
- zfcp_dbf_scsi_result(scpnt, req);
- scpnt->host_scribble = NULL;
- (scpnt->scsi_done) (scpnt);
- /*
- * We must hold this lock until scsi_done has been called.
- * Otherwise we may call scsi_done after abort regarding this
- * command has completed.
- * Note: scsi_done must not block!
- */
- read_unlock_irqrestore(&req->adapter->abort_lock, flags);
- }
- static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
- {
- switch (scsi_get_prot_op(scsi_cmnd)) {
- case SCSI_PROT_NORMAL:
- switch (scsi_cmnd->sc_data_direction) {
- case DMA_NONE:
- *data_dir = FSF_DATADIR_CMND;
- break;
- case DMA_FROM_DEVICE:
- *data_dir = FSF_DATADIR_READ;
- break;
- case DMA_TO_DEVICE:
- *data_dir = FSF_DATADIR_WRITE;
- break;
- case DMA_BIDIRECTIONAL:
- return -EINVAL;
- }
- break;
- case SCSI_PROT_READ_STRIP:
- *data_dir = FSF_DATADIR_DIF_READ_STRIP;
- break;
- case SCSI_PROT_WRITE_INSERT:
- *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
- break;
- case SCSI_PROT_READ_PASS:
- *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
- break;
- case SCSI_PROT_WRITE_PASS:
- *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
- break;
- default:
- return -EINVAL;
- }
- return 0;
- }
- /**
- * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
- * @scsi_cmnd: scsi command to be sent
- */
- int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
- {
- struct zfcp_fsf_req *req;
- struct fcp_cmnd *fcp_cmnd;
- u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
- int retval = -EIO;
- struct scsi_device *sdev = scsi_cmnd->device;
- struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
- struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
- struct zfcp_qdio *qdio = adapter->qdio;
- struct fsf_qtcb_bottom_io *io;
- unsigned long flags;
- if (unlikely(!(atomic_read(&zfcp_sdev->status) &
- ZFCP_STATUS_COMMON_UNBLOCKED)))
- return -EBUSY;
- spin_lock_irqsave(&qdio->req_q_lock, flags);
- if (atomic_read(&qdio->req_q_free) <= 0) {
- atomic_inc(&qdio->req_q_full);
- goto out;
- }
- if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
- sbtype = SBAL_SFLAGS0_TYPE_WRITE;
- req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
- sbtype, adapter->pool.scsi_req);
- if (IS_ERR(req)) {
- retval = PTR_ERR(req);
- goto out;
- }
- scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
- io = &req->qtcb->bottom.io;
- req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
- req->data = scsi_cmnd;
- req->handler = zfcp_fsf_fcp_cmnd_handler;
- req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
- req->qtcb->header.port_handle = zfcp_sdev->port->handle;
- io->service_class = FSF_CLASS_3;
- io->fcp_cmnd_length = FCP_CMND_LEN;
- if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
- io->data_block_length = scsi_cmnd->device->sector_size;
- io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
- }
- if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
- goto failed_scsi_cmnd;
- BUILD_BUG_ON(sizeof(struct fcp_cmnd) > FSF_FCP_CMND_SIZE);
- fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
- zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd);
- if ((scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) &&
- scsi_prot_sg_count(scsi_cmnd)) {
- zfcp_qdio_set_data_div(qdio, &req->qdio_req,
- scsi_prot_sg_count(scsi_cmnd));
- retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
- scsi_prot_sglist(scsi_cmnd));
- if (retval)
- goto failed_scsi_cmnd;
- io->prot_data_length = zfcp_qdio_real_bytes(
- scsi_prot_sglist(scsi_cmnd));
- }
- retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
- scsi_sglist(scsi_cmnd));
- if (unlikely(retval))
- goto failed_scsi_cmnd;
- zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
- if (zfcp_adapter_multi_buffer_active(adapter))
- zfcp_qdio_set_scount(qdio, &req->qdio_req);
- retval = zfcp_fsf_req_send(req);
- if (unlikely(retval))
- goto failed_scsi_cmnd;
- /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
- goto out;
- failed_scsi_cmnd:
- zfcp_fsf_req_free(req);
- scsi_cmnd->host_scribble = NULL;
- out:
- spin_unlock_irqrestore(&qdio->req_q_lock, flags);
- return retval;
- }
- static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
- {
- struct scsi_device *sdev = req->data;
- struct fcp_resp_with_ext *fcp_rsp;
- struct fcp_resp_rsp_info *rsp_info;
- zfcp_fsf_fcp_handler_common(req, sdev);
- fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
- rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
- if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
- (req->status & ZFCP_STATUS_FSFREQ_ERROR))
- req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
- }
- /**
- * zfcp_fsf_fcp_task_mgmt() - Send SCSI task management command (TMF).
- * @sdev: Pointer to SCSI device to send the task management command to.
- * @tm_flags: Unsigned byte for task management flags.
- *
- * Return: On success pointer to struct zfcp_fsf_req, %NULL otherwise.
- */
- struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_device *sdev,
- u8 tm_flags)
- {
- struct zfcp_fsf_req *req = NULL;
- struct fcp_cmnd *fcp_cmnd;
- struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
- struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
- if (unlikely(!(atomic_read(&zfcp_sdev->status) &
- ZFCP_STATUS_COMMON_UNBLOCKED)))
- return NULL;
- spin_lock_irq(&qdio->req_q_lock);
- if (zfcp_qdio_sbal_get(qdio))
- goto out;
- req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
- SBAL_SFLAGS0_TYPE_WRITE,
- qdio->adapter->pool.scsi_req);
- if (IS_ERR(req)) {
- req = NULL;
- goto out;
- }
- req->data = sdev;
- req->handler = zfcp_fsf_fcp_task_mgmt_handler;
- req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
- req->qtcb->header.port_handle = zfcp_sdev->port->handle;
- req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
- req->qtcb->bottom.io.service_class = FSF_CLASS_3;
- req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
- zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
- fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
- zfcp_fc_fcp_tm(fcp_cmnd, sdev, tm_flags);
- zfcp_fsf_start_timer(req, ZFCP_FSF_SCSI_ER_TIMEOUT);
- if (!zfcp_fsf_req_send(req)) {
- /* NOTE: DO NOT TOUCH req, UNTIL IT COMPLETES! */
- goto out;
- }
- zfcp_fsf_req_free(req);
- req = NULL;
- out:
- spin_unlock_irq(&qdio->req_q_lock);
- return req;
- }
- /**
- * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
- * @qdio: pointer to struct zfcp_qdio
- * @sbal_idx: response queue index of SBAL to be processed
- */
- void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
- {
- struct zfcp_adapter *adapter = qdio->adapter;
- struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
- struct qdio_buffer_element *sbale;
- struct zfcp_fsf_req *fsf_req;
- unsigned long req_id;
- int idx;
- for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
- sbale = &sbal->element[idx];
- req_id = sbale->addr;
- fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
- if (!fsf_req) {
- /*
- * Unknown request means that we have potentially memory
- * corruption and must stop the machine immediately.
- */
- zfcp_qdio_siosl(adapter);
- panic("error: unknown req_id (%lx) on adapter %s.\n",
- req_id, dev_name(&adapter->ccw_device->dev));
- }
- zfcp_fsf_req_complete(fsf_req);
- if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
- break;
- }
- }
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