[SCSI] fcoe, libfc: check offload features from LLD through netdev

[safe/jmp/linux-2.6] / drivers / scsi / fcoe / fcoe_sw.c

diff --git a/drivers/scsi/fcoe/fcoe_sw.c b/drivers/scsi/fcoe/fcoe_sw.c
index dc4cd5e..d99217d 100644 (file)
--- a/drivers/scsi/fcoe/fcoe_sw.c
+++ b/drivers/scsi/fcoe/fcoe_sw.c
@@ -104,19 +104,19 @@ static struct scsi_host_template fcoe_sw_shost_template = {
        .max_sectors = 0xffff,
 };
 
-/*
- * fcoe_sw_lport_config - sets up the fc_lport
+/**
+ * fcoe_sw_lport_config() - sets up the fc_lport
  * @lp: ptr to the fc_lport
  * @shost: ptr to the parent scsi host
  *
  * Returns: 0 for success
- *
  */
 static int fcoe_sw_lport_config(struct fc_lport *lp)
 {
        int i = 0;
 
-       lp->link_status = 0;
+       lp->link_up = 0;
+       lp->qfull = 0;
        lp->max_retry_count = 3;
        lp->e_d_tov = 2 * 1000; /* FC-FS default */
        lp->r_a_tov = 2 * 2 * 1000;
@@ -133,19 +133,24 @@ static int fcoe_sw_lport_config(struct fc_lport *lp)
        /* lport fc_lport related configuration */
        fc_lport_config(lp);
 
+       /* offload related configuration */
+       lp->crc_offload = 0;
+       lp->seq_offload = 0;
+       lp->lro_enabled = 0;
+       lp->lro_xid = 0;
+       lp->lso_max = 0;
+
        return 0;
 }
 
-/*
- * fcoe_sw_netdev_config - sets up fcoe_softc for lport and network
- * related properties
+/**
+ * fcoe_sw_netdev_config() - Set up netdev for SW FCoE
  * @lp : ptr to the fc_lport
  * @netdev : ptr to the associated netdevice struct
  *
  * Must be called after fcoe_sw_lport_config() as it will use lport mutex
  *
  * Returns : 0 for success
- *
  */
 static int fcoe_sw_netdev_config(struct fc_lport *lp, struct net_device *netdev)
 {
@@ -181,16 +186,36 @@ static int fcoe_sw_netdev_config(struct fc_lport *lp, struct net_device *netdev)
        if (fc_set_mfs(lp, mfs))
                return -EINVAL;
 
-       lp->link_status = ~FC_PAUSE & ~FC_LINK_UP;
        if (!fcoe_link_ok(lp))
-               lp->link_status |= FC_LINK_UP;
+               lp->link_up = 1;
 
        /* offload features support */
        if (fc->real_dev->features & NETIF_F_SG)
                lp->sg_supp = 1;
 
-
+#ifdef NETIF_F_FCOE_CRC
+       if (netdev->features & NETIF_F_FCOE_CRC) {
+               lp->crc_offload = 1;
+               printk(KERN_DEBUG "fcoe:%s supports FCCRC offload\n",
+                      netdev->name);
+       }
+#endif
+#ifdef NETIF_F_FSO
+       if (netdev->features & NETIF_F_FSO) {
+               lp->seq_offload = 1;
+               lp->lso_max = netdev->gso_max_size;
+               printk(KERN_DEBUG "fcoe:%s supports LSO for max len 0x%x\n",
+                      netdev->name, lp->lso_max);
+       }
+#endif
+       if (netdev->fcoe_ddp_xid) {
+               lp->lro_enabled = 1;
+               lp->lro_xid = netdev->fcoe_ddp_xid;
+               printk(KERN_DEBUG "fcoe:%s supports LRO for max xid 0x%x\n",
+                      netdev->name, lp->lro_xid);
+       }
        skb_queue_head_init(&fc->fcoe_pending_queue);
+       fc->fcoe_pending_queue_active = 0;
 
        /* setup Source Mac Address */
        memcpy(fc->ctl_src_addr, fc->real_dev->dev_addr,
@@ -224,16 +249,15 @@ static int fcoe_sw_netdev_config(struct fc_lport *lp, struct net_device *netdev)
        return 0;
 }
 
-/*
- * fcoe_sw_shost_config - sets up fc_lport->host
+/**
+ * fcoe_sw_shost_config() - Sets up fc_lport->host
  * @lp : ptr to the fc_lport
  * @shost : ptr to the associated scsi host
  * @dev : device associated to scsi host
  *
- * Must be called after fcoe_sw_lport_config) and fcoe_sw_netdev_config()
+ * Must be called after fcoe_sw_lport_config() and fcoe_sw_netdev_config()
  *
  * Returns : 0 for success
- *
  */
 static int fcoe_sw_shost_config(struct fc_lport *lp, struct Scsi_Host *shost,
                                struct device *dev)
@@ -261,8 +285,8 @@ static int fcoe_sw_shost_config(struct fc_lport *lp, struct Scsi_Host *shost,
        return 0;
 }
 
-/*
- * fcoe_sw_em_config - allocates em for this lport
+/**
+ * fcoe_sw_em_config() - allocates em for this lport
  * @lp: the port that em is to allocated for
  *
  * Returns : 0 on success
@@ -279,8 +303,8 @@ static inline int fcoe_sw_em_config(struct fc_lport *lp)
        return 0;
 }
 
-/*
- * fcoe_sw_destroy - FCoE software HBA tear-down function
+/**
+ * fcoe_sw_destroy() - FCoE software HBA tear-down function
  * @netdev: ptr to the associated net_device
  *
  * Returns: 0 if link is OK for use by FCoE.
@@ -301,7 +325,7 @@ static int fcoe_sw_destroy(struct net_device *netdev)
        if (!lp)
                return -ENODEV;
 
-       fc = fcoe_softc(lp);
+       fc = lport_priv(lp);
 
        /* Logout of the fabric */
        fc_fabric_logoff(lp);
@@ -353,8 +377,8 @@ static struct libfc_function_template fcoe_sw_libfc_fcn_templ = {
        .frame_send = fcoe_xmit,
 };
 
-/*
- * fcoe_sw_create - this function creates the fcoe interface
+/**
+ * fcoe_sw_create() - this function creates the fcoe interface
  * @netdev: pointer the associated netdevice
  *
  * Creates fc_lport struct and scsi_host for lport, configures lport
@@ -440,8 +464,8 @@ out_host_put:
        return rc;
 }
 
-/*
- * fcoe_sw_match - the fcoe sw transport match function
+/**
+ * fcoe_sw_match() - The FCoE SW transport match function
  *
  * Returns : false always
  */
@@ -461,8 +485,8 @@ struct fcoe_transport fcoe_sw_transport = {
        .device = 0xffff,
 };
 
-/*
- * fcoe_sw_init - registers fcoe_sw_transport
+/**
+ * fcoe_sw_init() - Registers fcoe_sw_transport
  *
  * Returns : 0 on success
  */
@@ -471,17 +495,22 @@ int __init fcoe_sw_init(void)
        /* attach to scsi transport */
        scsi_transport_fcoe_sw =
                fc_attach_transport(&fcoe_sw_transport_function);
+
        if (!scsi_transport_fcoe_sw) {
                printk(KERN_ERR "fcoe_sw_init:fc_attach_transport() failed\n");
                return -ENODEV;
        }
+
+       mutex_init(&fcoe_sw_transport.devlock);
+       INIT_LIST_HEAD(&fcoe_sw_transport.devlist);
+
        /* register sw transport */
        fcoe_transport_register(&fcoe_sw_transport);
        return 0;
 }
 
-/*
- * fcoe_sw_exit - unregisters fcoe_sw_transport
+/**
+ * fcoe_sw_exit() - Unregisters fcoe_sw_transport
  *
  * Returns : 0 on success
  */