1 files changed, 177 insertions, 27 deletions

diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index 61f8fdea2d96..ae560bc04f9d 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -521,9 +521,10 @@ static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
 {
         if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
-                scsi_block_requests(vhost->host);
-                ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING);
-                ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
+                if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
+                        scsi_block_requests(vhost->host);
+                        ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
+                }
         } else
                 vhost->reinit = 1;
 
@@ -854,39 +855,41 @@ static void ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
 }
 
 /**
- * __ibmvfc_find_target - Find the specified scsi_target (no locking)
+ * __ibmvfc_get_target - Find the specified scsi_target (no locking)
  * @starget:    scsi target struct
  *
  * Return value:
  *      ibmvfc_target struct / NULL if not found
  **/
-static struct ibmvfc_target *__ibmvfc_find_target(struct scsi_target *starget)
+static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
 {
         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
         struct ibmvfc_host *vhost = shost_priv(shost);
         struct ibmvfc_target *tgt;
 
         list_for_each_entry(tgt, &vhost->targets, queue)
-                if (tgt->target_id == starget->id)
+                if (tgt->target_id == starget->id) {
+                        kref_get(&tgt->kref);
                         return tgt;
+                }
         return NULL;
 }
 
 /**
- * ibmvfc_find_target - Find the specified scsi_target
+ * ibmvfc_get_target - Find the specified scsi_target
  * @starget:    scsi target struct
  *
  * Return value:
  *      ibmvfc_target struct / NULL if not found
  **/
-static struct ibmvfc_target *ibmvfc_find_target(struct scsi_target *starget)
+static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
 {
         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
         struct ibmvfc_target *tgt;
         unsigned long flags;
 
         spin_lock_irqsave(shost->host_lock, flags);
-        tgt = __ibmvfc_find_target(starget);
+        tgt = __ibmvfc_get_target(starget);
         spin_unlock_irqrestore(shost->host_lock, flags);
         return tgt;
 }
@@ -963,6 +966,9 @@ static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
         case IBMVFC_HALTED:
                 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
                 break;
+        case IBMVFC_NO_CRQ:
+                fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
+                break;
         default:
                 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
                 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
@@ -988,6 +994,17 @@ static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
 }
 
 /**
+ * ibmvfc_release_tgt - Free memory allocated for a target
+ * @kref:               kref struct
+ *
+ **/
+static void ibmvfc_release_tgt(struct kref *kref)
+{
+        struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
+        kfree(tgt);
+}
+
+/**
  * ibmvfc_get_starget_node_name - Get SCSI target's node name
  * @starget:    scsi target struct
  *
@@ -996,8 +1013,10 @@ static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
  **/
 static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
 {
-        struct ibmvfc_target *tgt = ibmvfc_find_target(starget);
+        struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
         fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
+        if (tgt)
+                kref_put(&tgt->kref, ibmvfc_release_tgt);
 }
 
 /**
@@ -1009,8 +1028,10 @@ static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
  **/
 static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
 {
-        struct ibmvfc_target *tgt = ibmvfc_find_target(starget);
+        struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
         fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
+        if (tgt)
+                kref_put(&tgt->kref, ibmvfc_release_tgt);
 }
 
 /**
@@ -1022,8 +1043,10 @@ static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
  **/
 static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
 {
-        struct ibmvfc_target *tgt = ibmvfc_find_target(starget);
+        struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
         fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
+        if (tgt)
+                kref_put(&tgt->kref, ibmvfc_release_tgt);
 }
 
 /**
@@ -1113,7 +1136,7 @@ static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
         login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ;
         login_info->capabilities = IBMVFC_CAN_MIGRATE;
         login_info->async.va = vhost->async_crq.msg_token;
-        login_info->async.len = vhost->async_crq.size;
+        login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs);
         strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
         strncpy(login_info->device_name,
                 vhost->host->shost_gendev.bus_id, IBMVFC_MAX_NAME);
@@ -1404,7 +1427,7 @@ static void ibmvfc_log_error(struct ibmvfc_event *evt)
                 err = cmd_status[index].name;
         }
 
-        if (!logerr && (vhost->log_level <= IBMVFC_DEFAULT_LOG_LEVEL))
+        if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
                 return;
 
         if (rsp->flags & FCP_RSP_LEN_VALID)
@@ -2054,7 +2077,7 @@ static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
 {
         const char *desc = ibmvfc_get_ae_desc(crq->event);
 
-        ibmvfc_log(vhost, 2, "%s event received\n", desc);
+        ibmvfc_log(vhost, 3, "%s event received\n", desc);
 
         switch (crq->event) {
         case IBMVFC_AE_LINK_UP:
@@ -2648,17 +2671,6 @@ static void ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
 }
 
 /**
- * ibmvfc_release_tgt - Free memory allocated for a target
- * @kref:               kref struct
- *
- **/
-static void ibmvfc_release_tgt(struct kref *kref)
-{
-        struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
-        kfree(tgt);
-}
-
-/**
  * ibmvfc_tgt_prli_done - Completion handler for Process Login
  * @evt:        ibmvfc event struct
  *
@@ -2902,6 +2914,139 @@ static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
 }
 
 /**
+ * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
+ * @mad:        ibmvfc passthru mad struct
+ * @tgt:        ibmvfc target struct
+ *
+ * Returns:
+ *      1 if PLOGI needed / 0 if PLOGI not needed
+ **/
+static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
+                                    struct ibmvfc_target *tgt)
+{
+        if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name,
+                   sizeof(tgt->ids.port_name)))
+                return 1;
+        if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name,
+                   sizeof(tgt->ids.node_name)))
+                return 1;
+        if (mad->fc_iu.response[6] != tgt->scsi_id)
+                return 1;
+        return 0;
+}
+
+/**
+ * ibmvfc_tgt_adisc_done - Completion handler for ADISC
+ * @evt:        ibmvfc event struct
+ *
+ **/
+static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
+{
+        struct ibmvfc_target *tgt = evt->tgt;
+        struct ibmvfc_host *vhost = evt->vhost;
+        struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
+        u32 status = mad->common.status;
+        u8 fc_reason, fc_explain;
+
+        vhost->discovery_threads--;
+        ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
+
+        switch (status) {
+        case IBMVFC_MAD_SUCCESS:
+                tgt_dbg(tgt, "ADISC succeeded\n");
+                if (ibmvfc_adisc_needs_plogi(mad, tgt))
+                        tgt->need_login = 1;
+                break;
+        case IBMVFC_MAD_DRIVER_FAILED:
+                break;
+        case IBMVFC_MAD_FAILED:
+        default:
+                tgt->need_login = 1;
+                fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16;
+                fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8;
+                tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
+                         ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error),
+                         mad->iu.status, mad->iu.error,
+                         ibmvfc_get_fc_type(fc_reason), fc_reason,
+                         ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
+                break;
+        };
+
+        kref_put(&tgt->kref, ibmvfc_release_tgt);
+        ibmvfc_free_event(evt);
+        wake_up(&vhost->work_wait_q);
+}
+
+/**
+ * ibmvfc_init_passthru - Initialize an event struct for FC passthru
+ * @evt:                ibmvfc event struct
+ *
+ **/
+static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
+{
+        struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
+
+        memset(mad, 0, sizeof(*mad));
+        mad->common.version = 1;
+        mad->common.opcode = IBMVFC_PASSTHRU;
+        mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu);
+        mad->cmd_ioba.va = (u64)evt->crq.ioba +
+                offsetof(struct ibmvfc_passthru_mad, iu);
+        mad->cmd_ioba.len = sizeof(mad->iu);
+        mad->iu.cmd_len = sizeof(mad->fc_iu.payload);
+        mad->iu.rsp_len = sizeof(mad->fc_iu.response);
+        mad->iu.cmd.va = (u64)evt->crq.ioba +
+                offsetof(struct ibmvfc_passthru_mad, fc_iu) +
+                offsetof(struct ibmvfc_passthru_fc_iu, payload);
+        mad->iu.cmd.len = sizeof(mad->fc_iu.payload);
+        mad->iu.rsp.va = (u64)evt->crq.ioba +
+                offsetof(struct ibmvfc_passthru_mad, fc_iu) +
+                offsetof(struct ibmvfc_passthru_fc_iu, response);
+        mad->iu.rsp.len = sizeof(mad->fc_iu.response);
+}
+
+/**
+ * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
+ * @tgt:                ibmvfc target struct
+ *
+ **/
+static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
+{
+        struct ibmvfc_passthru_mad *mad;
+        struct ibmvfc_host *vhost = tgt->vhost;
+        struct ibmvfc_event *evt;
+
+        if (vhost->discovery_threads >= disc_threads)
+                return;
+
+        kref_get(&tgt->kref);
+        evt = ibmvfc_get_event(vhost);
+        vhost->discovery_threads++;
+        ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
+        evt->tgt = tgt;
+
+        ibmvfc_init_passthru(evt);
+        mad = &evt->iu.passthru;
+        mad->iu.flags = IBMVFC_FC_ELS;
+        mad->iu.scsi_id = tgt->scsi_id;
+
+        mad->fc_iu.payload[0] = IBMVFC_ADISC;
+        memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
+               sizeof(vhost->login_buf->resp.port_name));
+        memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
+               sizeof(vhost->login_buf->resp.node_name));
+        mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff;
+
+        ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
+        if (ibmvfc_send_event(evt, vhost, default_timeout)) {
+                vhost->discovery_threads--;
+                ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
+                kref_put(&tgt->kref, ibmvfc_release_tgt);
+        } else
+                tgt_dbg(tgt, "Sent ADISC\n");
+}
+
+/**
  * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
  * @evt:        ibmvfc event struct
  *
@@ -2921,6 +3066,8 @@ static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
                 tgt->new_scsi_id = rsp->scsi_id;
                 if (rsp->scsi_id != tgt->scsi_id)
                         ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
+                else
+                        ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
                 break;
         case IBMVFC_MAD_DRIVER_FAILED:
                 break;
@@ -3336,6 +3483,7 @@ static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
                 tgt_dbg(tgt, "rport add succeeded\n");
                 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff;
                 rport->supported_classes = 0;
+                tgt->target_id = rport->scsi_target_id;
                 if (tgt->service_parms.class1_parms[0] & 0x80000000)
                         rport->supported_classes |= FC_COS_CLASS1;
                 if (tgt->service_parms.class2_parms[0] & 0x80000000)
@@ -3800,10 +3948,12 @@ static int ibmvfc_remove(struct vio_dev *vdev)
 
         ENTER;
         ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
+        ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
+        ibmvfc_wait_while_resetting(vhost);
+        ibmvfc_release_crq_queue(vhost);
         kthread_stop(vhost->work_thread);
         fc_remove_host(vhost->host);
         scsi_remove_host(vhost->host);
-        ibmvfc_release_crq_queue(vhost);
 
         spin_lock_irqsave(vhost->host->host_lock, flags);
         ibmvfc_purge_requests(vhost, DID_ERROR);