From: Yi Zou <yi.zou@intel.com>
Date: Fri, 27 Feb 2009 22:07:04 +0000 (-0800)
Subject: [SCSI] fcoe, libfc: check offload features from LLD through netdev
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=ea1e9a9df5e1fde7ad8878c85b4a097cad0ddcea;p=linux-2.6-omap-h63xx.git

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

This checks if net_devices supports FCoE offload ops in netdev_ops and it
if it does, then sets up the corresponding flags in the associated fc_lport.

For large send offload, the maximum length supported in one large send is now
described by the added lso_max in fc_lport, which is setup initially from
netdev->gso_max_size.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
---

diff --git a/drivers/scsi/fcoe/fcoe_sw.c b/drivers/scsi/fcoe/fcoe_sw.c
index da210eba194..d99217d0510 100644
--- a/drivers/scsi/fcoe/fcoe_sw.c
+++ b/drivers/scsi/fcoe/fcoe_sw.c
@@ -133,6 +133,13 @@ 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;
 }
 
@@ -186,7 +193,27 @@ static int fcoe_sw_netdev_config(struct fc_lport *lp, struct net_device *netdev)
 	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;
 
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index a2e126b86e3..61c746cf55f 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -654,6 +654,7 @@ struct fc_lport {
 	u16			link_speed;
 	u16			link_supported_speeds;
 	u16			lro_xid;	/* max xid for fcoe lro */
+	unsigned int		lso_max;	/* max large send size */
 	struct fc_ns_fts	fcts;	        /* FC-4 type masks */
 	struct fc_els_rnid_gen	rnid_gen;	/* RNID information */