Merge branch 'linus' into perfcounters/core

Merge reason: need the upstream facility added by:

  7f1e2ca: hrtimer: fix rq->lock inversion (again)

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 119 insertions, 108 deletions

diff --git a/include/scsi/libfcoe.h b/include/scsi/libfcoe.h
index c41f7d0c6ef..666cc131732 100644
--- a/include/scsi/libfcoe.h
+++ b/include/scsi/libfcoe.h
@@ -1,5 +1,6 @@
 /*
- * Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
+ * Copyright (c) 2008-2009 Cisco Systems, Inc.  All rights reserved.
+ * Copyright (c) 2007-2008 Intel Corporation.  All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -20,134 +21,144 @@
 #ifndef _LIBFCOE_H
 #define _LIBFCOE_H
 
+#include <linux/etherdevice.h>
+#include <linux/if_ether.h>
 #include <linux/netdevice.h>
 #include <linux/skbuff.h>
+#include <linux/workqueue.h>
 #include <scsi/fc/fc_fcoe.h>
 #include <scsi/libfc.h>
 
 /*
- * this percpu struct for fcoe
+ * FIP tunable parameters.
  */
-struct fcoe_percpu_s {
-	int		cpu;
-	struct task_struct *thread;
-	struct sk_buff_head fcoe_rx_list;
-	struct page *crc_eof_page;
-	int crc_eof_offset;
+#define FCOE_CTLR_START_DELAY	2000	/* mS after first adv. to choose FCF */
+#define FCOE_CTRL_SOL_TOV	2000	/* min. solicitation interval (mS) */
+#define FCOE_CTLR_FCF_LIMIT	20	/* max. number of FCF entries */
+
+/**
+ * enum fip_state - internal state of FCoE controller.
+ * @FIP_ST_DISABLED: 	controller has been disabled or not yet enabled.
+ * @FIP_ST_LINK_WAIT:	the physical link is down or unusable.
+ * @FIP_ST_AUTO:	determining whether to use FIP or non-FIP mode.
+ * @FIP_ST_NON_FIP:	non-FIP mode selected.
+ * @FIP_ST_ENABLED:	FIP mode selected.
+ */
+enum fip_state {
+	FIP_ST_DISABLED,
+	FIP_ST_LINK_WAIT,
+	FIP_ST_AUTO,
+	FIP_ST_NON_FIP,
+	FIP_ST_ENABLED,
 };
 
-/*
- * the fcoe sw transport private data
+/**
+ * struct fcoe_ctlr - FCoE Controller and FIP state.
+ * @state:	internal FIP state for network link and FIP or non-FIP mode.
+ * @lp:		&fc_lport: libfc local port.
+ * @sel_fcf:	currently selected FCF, or NULL.
+ * @fcfs:	list of discovered FCFs.
+ * @fcf_count:	number of discovered FCF entries.
+ * @sol_time:	time when a multicast solicitation was last sent.
+ * @sel_time:	time after which to select an FCF.
+ * @port_ka_time: time of next port keep-alive.
+ * @ctlr_ka_time: time of next controller keep-alive.
+ * @timer:	timer struct used for all delayed events.
+ * @link_work:	&work_struct for doing FCF selection.
+ * @recv_work:	&work_struct for receiving FIP frames.
+ * @fip_recv_list: list of received FIP frames.
+ * @user_mfs:	configured maximum FC frame size, including FC header.
+ * @flogi_oxid: exchange ID of most recent fabric login.
+ * @flogi_count: number of FLOGI attempts in AUTO mode.
+ * @link:	current link status for libfc.
+ * @last_link:	last link state reported to libfc.
+ * @map_dest:	use the FC_MAP mode for destination MAC addresses.
+ * @dest_addr:	MAC address of the selected FC forwarder.
+ * @ctl_src_addr: the native MAC address of our local port.
+ * @data_src_addr: the assigned MAC address for the local port after FLOGI.
+ * @send:	LLD-supplied function to handle sending of FIP Ethernet frames.
+ * @update_mac: LLD-supplied function to handle changes to MAC addresses.
+ * @lock:	lock protecting this structure.
+ *
+ * This structure is used by all FCoE drivers.  It contains information
+ * needed by all FCoE low-level drivers (LLDs) as well as internal state
+ * for FIP, and fields shared with the LLDS.
  */
-struct fcoe_softc {
-	struct list_head list;
+struct fcoe_ctlr {
+	enum fip_state state;
 	struct fc_lport *lp;
-	struct net_device *real_dev;
-	struct net_device *phys_dev;		/* device with ethtool_ops */
-	struct packet_type  fcoe_packet_type;
-	struct sk_buff_head fcoe_pending_queue;
-	u8	fcoe_pending_queue_active;
-
+	struct fcoe_fcf *sel_fcf;
+	struct list_head fcfs;
+	u16 fcf_count;
+	unsigned long sol_time;
+	unsigned long sel_time;
+	unsigned long port_ka_time;
+	unsigned long ctlr_ka_time;
+	struct timer_list timer;
+	struct work_struct link_work;
+	struct work_struct recv_work;
+	struct sk_buff_head fip_recv_list;
+	u16 user_mfs;
+	u16 flogi_oxid;
+	u8 flogi_count;
+	u8 link;
+	u8 last_link;
+	u8 map_dest;
 	u8 dest_addr[ETH_ALEN];
 	u8 ctl_src_addr[ETH_ALEN];
 	u8 data_src_addr[ETH_ALEN];
-	/*
-	 * fcoe protocol address learning related stuff
-	 */
-	u16 flogi_oxid;
-	u8 flogi_progress;
-	u8 address_mode;
-};
-
-static inline struct net_device *fcoe_netdev(
-	const struct fc_lport *lp)
-{
-	return ((struct fcoe_softc *)lport_priv(lp))->real_dev;
-}
-
-static inline struct fcoe_hdr *skb_fcoe_header(const struct sk_buff *skb)
-{
-	return (struct fcoe_hdr *)skb_network_header(skb);
-}
-
-static inline int skb_fcoe_offset(const struct sk_buff *skb)
-{
-	return skb_network_offset(skb);
-}
-
-static inline struct fc_frame_header *skb_fc_header(const struct sk_buff *skb)
-{
-	return (struct fc_frame_header *)skb_transport_header(skb);
-}
-
-static inline int skb_fc_offset(const struct sk_buff *skb)
-{
-	return skb_transport_offset(skb);
-}
 
-static inline void skb_reset_fc_header(struct sk_buff *skb)
-{
-	skb_reset_network_header(skb);
-	skb_set_transport_header(skb, skb_network_offset(skb) +
-				 sizeof(struct fcoe_hdr));
-}
-
-static inline bool skb_fc_is_data(const struct sk_buff *skb)
-{
-	return skb_fc_header(skb)->fh_r_ctl == FC_RCTL_DD_SOL_DATA;
-}
-
-static inline bool skb_fc_is_cmd(const struct sk_buff *skb)
-{
-	return skb_fc_header(skb)->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD;
-}
+	void (*send)(struct fcoe_ctlr *, struct sk_buff *);
+	void (*update_mac)(struct fcoe_ctlr *, u8 *old, u8 *new);
+	spinlock_t lock;
+};
 
-static inline bool skb_fc_has_exthdr(const struct sk_buff *skb)
-{
-	return (skb_fc_header(skb)->fh_r_ctl == FC_RCTL_VFTH) ||
-	    (skb_fc_header(skb)->fh_r_ctl == FC_RCTL_IFRH) ||
-	    (skb_fc_header(skb)->fh_r_ctl == FC_RCTL_ENCH);
-}
+/*
+ * struct fcoe_fcf - Fibre-Channel Forwarder.
+ * @list:	list linkage.
+ * @time:	system time (jiffies) when an advertisement was last received.
+ * @switch_name: WWN of switch from advertisement.
+ * @fabric_name: WWN of fabric from advertisement.
+ * @fc_map:	FC_MAP value from advertisement.
+ * @fcf_mac:	Ethernet address of the FCF.
+ * @vfid:	virtual fabric ID.
+ * @pri:	seletion priority, smaller values are better.
+ * @flags:	flags received from advertisement.
+ * @fka_period:	keep-alive period, in jiffies.
+ *
+ * A Fibre-Channel Forwarder (FCF) is the entity on the Ethernet that
+ * passes FCoE frames on to an FC fabric.  This structure represents
+ * one FCF from which advertisements have been received.
+ *
+ * When looking up an FCF, @switch_name, @fabric_name, @fc_map, @vfid, and
+ * @fcf_mac together form the lookup key.
+ */
+struct fcoe_fcf {
+	struct list_head list;
+	unsigned long time;
 
-static inline bool skb_fc_is_roff(const struct sk_buff *skb)
-{
-	return skb_fc_header(skb)->fh_f_ctl[2] & FC_FC_REL_OFF;
-}
+	u64 switch_name;
+	u64 fabric_name;
+	u32 fc_map;
+	u16 vfid;
+	u8 fcf_mac[ETH_ALEN];
 
-static inline u16 skb_fc_oxid(const struct sk_buff *skb)
-{
-	return be16_to_cpu(skb_fc_header(skb)->fh_ox_id);
-}
+	u8 pri;
+	u16 flags;
+	u32 fka_period;
+};
 
-static inline u16 skb_fc_rxid(const struct sk_buff *skb)
-{
-	return be16_to_cpu(skb_fc_header(skb)->fh_rx_id);
-}
+/* FIP API functions */
+void fcoe_ctlr_init(struct fcoe_ctlr *);
+void fcoe_ctlr_destroy(struct fcoe_ctlr *);
+void fcoe_ctlr_link_up(struct fcoe_ctlr *);
+int fcoe_ctlr_link_down(struct fcoe_ctlr *);
+int fcoe_ctlr_els_send(struct fcoe_ctlr *, struct sk_buff *);
+void fcoe_ctlr_recv(struct fcoe_ctlr *, struct sk_buff *);
+int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *, struct fc_frame *fp, u8 *sa);
 
 /* libfcoe funcs */
-int fcoe_reset(struct Scsi_Host *shost);
-u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN],
-		      unsigned int scheme, unsigned int port);
-
-u32 fcoe_fc_crc(struct fc_frame *fp);
-int fcoe_xmit(struct fc_lport *, struct fc_frame *);
-int fcoe_rcv(struct sk_buff *, struct net_device *,
-	     struct packet_type *, struct net_device *);
-
-int fcoe_percpu_receive_thread(void *arg);
-void fcoe_clean_pending_queue(struct fc_lport *lp);
-void fcoe_percpu_clean(struct fc_lport *lp);
-void fcoe_watchdog(ulong vp);
-int fcoe_link_ok(struct fc_lport *lp);
-
-struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
-int fcoe_hostlist_add(const struct fc_lport *);
-int fcoe_hostlist_remove(const struct fc_lport *);
-
-struct Scsi_Host *fcoe_host_alloc(struct scsi_host_template *, int);
+u64 fcoe_wwn_from_mac(unsigned char mac[], unsigned int, unsigned int);
 int fcoe_libfc_config(struct fc_lport *, struct libfc_function_template *);
 
-/* fcoe sw hba */
-int __init fcoe_sw_init(void);
-int __exit fcoe_sw_exit(void);
 #endif /* _LIBFCOE_H */