[SCSI] fnic: Add FIP support to the fnic driver

Use libfcoe as a common FIP implementation with fcoe.
FIP or non-FIP mode is fully automatic if the firmware
supports and enables it.

Even if FIP is not supported, this uses libfcoe for the non-FIP
handling of FLOGI and its response.

Use the new lport_set_port_id() notification to capture
successful FLOGI responses and port_id resets.

While transitioning between Ethernet and FC mode, all rx and
tx FC frames are queued.  In Ethernet mode, all frames are
passed to the exchange manager to capture FLOGI responses.

Change to set data_src_addr to the ctl_src_addr whenever it
would have previously been zero because we're not logged in.
This seems safer so we'll never send a frame with a 0 source MAC.
This also eliminates a special case for sending FLOGI frames.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

drivers/scsi/Kconfig

@@ -663,7 +663,7 @@ config FCOE
 config FCOE_FNIC
 	tristate "Cisco FNIC Driver"
 	depends on PCI && X86
-	select LIBFC
+	select LIBFCOE
 	help
 	  This is support for the Cisco PCI-Express FCoE HBA.
 

drivers/scsi/fnic/fnic.h

@@ -22,6 +22,7 @@
 #include <linux/netdevice.h>
 #include <linux/workqueue.h>
 #include <scsi/libfc.h>
+#include <scsi/libfcoe.h>
 #include "fnic_io.h"
 #include "fnic_res.h"
 #include "vnic_dev.h"
@@ -145,6 +146,7 @@ struct mempool;
 /* Per-instance private data structure */
 struct fnic {
 	struct fc_lport *lport;
+	struct fcoe_ctlr ctlr;		/* FIP FCoE controller structure */
 	struct vnic_dev_bar bar0;
 
 	struct msix_entry msix_entry[FNIC_MSIX_INTR_MAX];
@@ -162,23 +164,16 @@ struct fnic {
 	unsigned int wq_count;
 	unsigned int cq_count;
 
-	u32 fcoui_mode:1;		/* use fcoui address*/
 	u32 vlan_hw_insert:1;	        /* let hw insert the tag */
 	u32 in_remove:1;                /* fnic device in removal */
 	u32 stop_rx_link_events:1;      /* stop proc. rx frames, link events */
 
 	struct completion *remove_wait; /* device remove thread blocks */
 
-	struct fc_frame *flogi;
-	struct fc_frame *flogi_resp;
-	u16 flogi_oxid;
-	unsigned long s_id;
 	enum fnic_state state;
 	spinlock_t fnic_lock;
 
 	u16 vlan_id;	                /* VLAN tag including priority */
-	u8 mac_addr[ETH_ALEN];
-	u8 dest_addr[ETH_ALEN];
 	u8 data_src_addr[ETH_ALEN];
 	u64 fcp_input_bytes;		/* internal statistic */
 	u64 fcp_output_bytes;		/* internal statistic */
@@ -205,6 +200,7 @@ struct fnic {
 	struct work_struct link_work;
 	struct work_struct frame_work;
 	struct sk_buff_head frame_queue;
+	struct sk_buff_head tx_queue;
 
 	/* copy work queue cache line section */
 	____cacheline_aligned struct vnic_wq_copy wq_copy[FNIC_WQ_COPY_MAX];
@@ -224,6 +220,11 @@ struct fnic {
 	____cacheline_aligned struct vnic_intr intr[FNIC_MSIX_INTR_MAX];
 };
 
+static inline struct fnic *fnic_from_ctlr(struct fcoe_ctlr *fip)
+{
+	return container_of(fip, struct fnic, ctlr);
+}
+
 extern struct workqueue_struct *fnic_event_queue;
 extern struct device_attribute *fnic_attrs[];
 
@@ -239,7 +240,11 @@ void fnic_handle_link(struct work_struct *work);
 int fnic_rq_cmpl_handler(struct fnic *fnic, int);
 int fnic_alloc_rq_frame(struct vnic_rq *rq);
 void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf);
-int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp);
+void fnic_flush_tx(struct fnic *);
+void fnic_eth_send(struct fcoe_ctlr *, struct sk_buff *skb);
+void fnic_set_port_id(struct fc_lport *, u32, struct fc_frame *);
+void fnic_update_mac(struct fc_lport *, u8 *new);
+void fnic_update_mac_locked(struct fnic *, u8 *new);
 
 int fnic_queuecommand(struct scsi_cmnd *, void (*done)(struct scsi_cmnd *));
 int fnic_abort_cmd(struct scsi_cmnd *);
@@ -252,7 +257,7 @@ void fnic_empty_scsi_cleanup(struct fc_lport *);
 void fnic_exch_mgr_reset(struct fc_lport *, u32, u32);
 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int);
 int fnic_wq_cmpl_handler(struct fnic *fnic, int);
-int fnic_flogi_reg_handler(struct fnic *fnic);
+int fnic_flogi_reg_handler(struct fnic *fnic, u32);
 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
 				  struct fcpio_host_req *desc);
 int fnic_fw_reset_handler(struct fnic *fnic);