Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/agpgart
[powerpc.git] / drivers / s390 / scsi / zfcp_erp.c
index 53ebc1c..cb4f612 100644 (file)
@@ -35,7 +35,7 @@
 
 #include "zfcp_ext.h"
 
-static int zfcp_erp_adisc(struct zfcp_adapter *, fc_id_t);
+static int zfcp_erp_adisc(struct zfcp_port *);
 static void zfcp_erp_adisc_handler(unsigned long);
 
 static int zfcp_erp_adapter_reopen_internal(struct zfcp_adapter *, int);
@@ -295,12 +295,12 @@ zfcp_erp_unit_shutdown(struct zfcp_unit *unit, int clear_mask)
 
 /**
  * zfcp_erp_adisc - send ADISC ELS command
- * @adapter: adapter structure
- * @d_id: d_id of port where ADISC is sent to
+ * @port: port structure
  */
 int
-zfcp_erp_adisc(struct zfcp_adapter *adapter, fc_id_t d_id)
+zfcp_erp_adisc(struct zfcp_port *port)
 {
+       struct zfcp_adapter *adapter = port->adapter;
        struct zfcp_send_els *send_els;
        struct zfcp_ls_adisc *adisc;
        void *address = NULL;
@@ -332,7 +332,8 @@ zfcp_erp_adisc(struct zfcp_adapter *adapter, fc_id_t d_id)
        send_els->req_count = send_els->resp_count = 1;
 
        send_els->adapter = adapter;
-       send_els->d_id = d_id;
+       send_els->port = port;
+       send_els->d_id = port->d_id;
        send_els->handler = zfcp_erp_adisc_handler;
        send_els->handler_data = (unsigned long) send_els;
 
@@ -350,7 +351,7 @@ zfcp_erp_adisc(struct zfcp_adapter *adapter, fc_id_t d_id)
        ZFCP_LOG_INFO("ADISC request from s_id 0x%08x to d_id 0x%08x "
                      "(wwpn=0x%016Lx, wwnn=0x%016Lx, "
                      "hard_nport_id=0x%08x, nport_id=0x%08x)\n",
-                     adapter->s_id, d_id, (wwn_t) adisc->wwpn,
+                     adapter->s_id, send_els->d_id, (wwn_t) adisc->wwpn,
                      (wwn_t) adisc->wwnn, adisc->hard_nport_id,
                      adisc->nport_id);
 
@@ -367,7 +368,7 @@ zfcp_erp_adisc(struct zfcp_adapter *adapter, fc_id_t d_id)
        retval = zfcp_fsf_send_els(send_els);
        if (retval != 0) {
                ZFCP_LOG_NORMAL("error: initiation of Send ELS failed for port "
-                               "0x%08x on adapter %s\n", d_id,
+                               "0x%08x on adapter %s\n", send_els->d_id,
                                zfcp_get_busid_by_adapter(adapter));
                del_timer(send_els->timer);
                goto freemem;
@@ -411,14 +412,9 @@ zfcp_erp_adisc_handler(unsigned long data)
        del_timer(send_els->timer);
 
        adapter = send_els->adapter;
+       port = send_els->port;
        d_id = send_els->d_id;
 
-       read_lock(&zfcp_data.config_lock);
-       port = zfcp_get_port_by_did(send_els->adapter, send_els->d_id);
-       read_unlock(&zfcp_data.config_lock);
-
-       BUG_ON(port == NULL);
-
        /* request rejected or timed out */
        if (send_els->status != 0) {
                ZFCP_LOG_NORMAL("ELS request rejected/timed out, "
@@ -482,7 +478,7 @@ zfcp_test_link(struct zfcp_port *port)
        int retval;
 
        zfcp_port_get(port);
-       retval = zfcp_erp_adisc(port->adapter, port->d_id);
+       retval = zfcp_erp_adisc(port);
        if (retval != 0) {
                zfcp_port_put(port);
                ZFCP_LOG_NORMAL("reopen needed for port 0x%016Lx "
@@ -895,7 +891,7 @@ zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *erp_action)
 
        if (erp_action->fsf_req) {
                /* take lock to ensure that request is not being deleted meanwhile */
-               write_lock(&adapter->fsf_req_list_lock);
+               spin_lock(&adapter->fsf_req_list_lock);
                /* check whether fsf req does still exist */
                list_for_each_entry(fsf_req, &adapter->fsf_req_list_head, list)
                    if (fsf_req == erp_action->fsf_req)
@@ -938,7 +934,7 @@ zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *erp_action)
                         */
                        erp_action->fsf_req = NULL;
                }
-               write_unlock(&adapter->fsf_req_list_lock);
+               spin_unlock(&adapter->fsf_req_list_lock);
        } else
                debug_text_event(adapter->erp_dbf, 3, "a_ca_noreq");
 
@@ -2286,12 +2282,12 @@ zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *erp_action)
 {
        int retval = ZFCP_ERP_SUCCEEDED;
        int retries;
+       int sleep = ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP;
        struct zfcp_adapter *adapter = erp_action->adapter;
 
        atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status);
-       retries = ZFCP_EXCHANGE_CONFIG_DATA_RETRIES;
 
-       do {
+       for (retries = ZFCP_EXCHANGE_CONFIG_DATA_RETRIES; retries; retries--) {
                atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
                                  &adapter->status);
                ZFCP_LOG_DEBUG("Doing exchange config data\n");
@@ -2329,16 +2325,17 @@ zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *erp_action)
                                      zfcp_get_busid_by_adapter(adapter));
                        break;
                }
-               if (atomic_test_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
-                                    &adapter->status)) {
-                       ZFCP_LOG_DEBUG("host connection still initialising... "
-                                      "waiting and retrying...\n");
-                       /* sleep a little bit before retry */
-                       msleep(jiffies_to_msecs(ZFCP_EXCHANGE_CONFIG_DATA_SLEEP));
-               }
-       } while ((retries--) &&
-                atomic_test_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
-                                 &adapter->status));
+
+               if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
+                                    &adapter->status))
+                       break;
+
+               ZFCP_LOG_DEBUG("host connection still initialising... "
+                              "waiting and retrying...\n");
+               /* sleep a little bit before retry */
+               msleep(jiffies_to_msecs(sleep));
+               sleep *= 2;
+       }
 
        if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
                              &adapter->status)) {
@@ -3363,13 +3360,32 @@ zfcp_erp_action_cleanup(int action, struct zfcp_adapter *adapter,
                if ((result == ZFCP_ERP_SUCCEEDED)
                    && (!atomic_test_mask(ZFCP_STATUS_UNIT_TEMPORARY,
                                          &unit->status))
-                   && (!unit->device))
-                       scsi_add_device(unit->port->adapter->scsi_host, 0,
-                                       unit->port->scsi_id, unit->scsi_lun);
+                   && !unit->device
+                   && port->rport)
+                       scsi_add_device(port->adapter->scsi_host, 0,
+                                       port->rport->scsi_target_id,
+                                       unit->scsi_lun);
                zfcp_unit_put(unit);
                break;
        case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
        case ZFCP_ERP_ACTION_REOPEN_PORT:
+               if ((result == ZFCP_ERP_SUCCEEDED)
+                   && !atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN,
+                                        &port->status)
+                   && !port->rport) {
+                       struct fc_rport_identifiers ids;
+                       ids.node_name = port->wwnn;
+                       ids.port_name = port->wwpn;
+                       ids.port_id = port->d_id;
+                       ids.roles = FC_RPORT_ROLE_FCP_TARGET;
+                       port->rport =
+                               fc_remote_port_add(adapter->scsi_host, 0, &ids);
+                       if (!port->rport)
+                               ZFCP_LOG_NORMAL("failed registration of rport"
+                                               "(adapter %s, wwpn=0x%016Lx)\n",
+                                               zfcp_get_busid_by_port(port),
+                                               port->wwpn);
+               }
                zfcp_port_put(port);
                break;
        case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
@@ -3484,6 +3500,45 @@ zfcp_erp_action_to_ready(struct zfcp_erp_action *erp_action)
        list_move(&erp_action->list, &erp_action->adapter->erp_ready_head);
 }
 
+/*
+ * function:   zfcp_erp_port_boxed
+ *
+ * purpose:
+ */
+void
+zfcp_erp_port_boxed(struct zfcp_port *port)
+{
+       struct zfcp_adapter *adapter = port->adapter;
+       unsigned long flags;
+
+       debug_text_event(adapter->erp_dbf, 3, "p_access_boxed");
+       debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof(wwn_t));
+       read_lock_irqsave(&zfcp_data.config_lock, flags);
+       zfcp_erp_modify_port_status(port,
+                       ZFCP_STATUS_COMMON_ACCESS_BOXED,
+                       ZFCP_SET);
+       read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+       zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED);
+}
+
+/*
+ * function:   zfcp_erp_unit_boxed
+ *
+ * purpose:
+ */
+void
+zfcp_erp_unit_boxed(struct zfcp_unit *unit)
+{
+       struct zfcp_adapter *adapter = unit->port->adapter;
+
+       debug_text_event(adapter->erp_dbf, 3, "u_access_boxed");
+       debug_event(adapter->erp_dbf, 3, &unit->fcp_lun, sizeof(fcp_lun_t));
+       zfcp_erp_modify_unit_status(unit,
+                       ZFCP_STATUS_COMMON_ACCESS_BOXED,
+                       ZFCP_SET);
+       zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED);
+}
+
 /*
  * function:   zfcp_erp_port_access_denied
  *
@@ -3495,11 +3550,13 @@ zfcp_erp_port_access_denied(struct zfcp_port *port)
        struct zfcp_adapter *adapter = port->adapter;
        unsigned long flags;
 
-       debug_text_event(adapter->erp_dbf, 3, "p_access_block");
+       debug_text_event(adapter->erp_dbf, 3, "p_access_denied");
        debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof(wwn_t));
        read_lock_irqsave(&zfcp_data.config_lock, flags);
-       zfcp_erp_modify_port_status(port, ZFCP_STATUS_COMMON_ERP_FAILED |
-                                   ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET);
+       zfcp_erp_modify_port_status(port,
+                       ZFCP_STATUS_COMMON_ERP_FAILED |
+                       ZFCP_STATUS_COMMON_ACCESS_DENIED,
+                       ZFCP_SET);
        read_unlock_irqrestore(&zfcp_data.config_lock, flags);
 }
 
@@ -3513,10 +3570,12 @@ zfcp_erp_unit_access_denied(struct zfcp_unit *unit)
 {
        struct zfcp_adapter *adapter = unit->port->adapter;
 
-       debug_text_event(adapter->erp_dbf, 3, "u_access_block");
+       debug_text_event(adapter->erp_dbf, 3, "u_access_denied");
        debug_event(adapter->erp_dbf, 3, &unit->fcp_lun, sizeof(fcp_lun_t));
-       zfcp_erp_modify_unit_status(unit, ZFCP_STATUS_COMMON_ERP_FAILED |
-                                   ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET);
+       zfcp_erp_modify_unit_status(unit,
+                       ZFCP_STATUS_COMMON_ERP_FAILED |
+                       ZFCP_STATUS_COMMON_ACCESS_DENIED,
+                       ZFCP_SET);
 }
 
 /*
@@ -3530,7 +3589,7 @@ zfcp_erp_adapter_access_changed(struct zfcp_adapter *adapter)
        struct zfcp_port *port;
        unsigned long flags;
 
-       debug_text_event(adapter->erp_dbf, 3, "a_access_unblock");
+       debug_text_event(adapter->erp_dbf, 3, "a_access_recover");
        debug_event(adapter->erp_dbf, 3, &adapter->name, 8);
 
        read_lock_irqsave(&zfcp_data.config_lock, flags);
@@ -3553,10 +3612,12 @@ zfcp_erp_port_access_changed(struct zfcp_port *port)
        struct zfcp_adapter *adapter = port->adapter;
        struct zfcp_unit *unit;
 
-       debug_text_event(adapter->erp_dbf, 3, "p_access_unblock");
+       debug_text_event(adapter->erp_dbf, 3, "p_access_recover");
        debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof(wwn_t));
 
        if (!atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED,
+                             &port->status) &&
+           !atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_BOXED,
                              &port->status)) {
                if (!atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status))
                        list_for_each_entry(unit, &port->unit_list_head, list)
@@ -3583,10 +3644,13 @@ zfcp_erp_unit_access_changed(struct zfcp_unit *unit)
 {
        struct zfcp_adapter *adapter = unit->port->adapter;
 
-       debug_text_event(adapter->erp_dbf, 3, "u_access_unblock");
+       debug_text_event(adapter->erp_dbf, 3, "u_access_recover");
        debug_event(adapter->erp_dbf, 3, &unit->fcp_lun, sizeof(fcp_lun_t));
 
-       if (!atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED, &unit->status))
+       if (!atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED,
+                             &unit->status) &&
+           !atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_BOXED,
+                             &unit->status))
                return;
 
        ZFCP_LOG_NORMAL("reopen of unit 0x%016Lx on port 0x%016Lx "