176 строки
5.9 KiB
C
176 строки
5.9 KiB
C
/*
|
|
* 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,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Maintained at www.Open-FCoE.org
|
|
*/
|
|
|
|
#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>
|
|
|
|
/*
|
|
* FIP tunable parameters.
|
|
*/
|
|
#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,
|
|
};
|
|
|
|
/**
|
|
* struct fcoe_ctlr - FCoE Controller and FIP state
|
|
* @state: internal FIP state for network link and FIP or non-FIP mode.
|
|
* @mode: LLD-selected 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.
|
|
* @spma: supports SPMA server-provided MACs mode
|
|
* @send_ctlr_ka: need to send controller keep alive
|
|
* @send_port_ka: need to send port keep alives
|
|
* @dest_addr: MAC address of the selected FC forwarder.
|
|
* @ctl_src_addr: the native MAC address of our local port.
|
|
* @send: LLD-supplied function to handle sending FIP Ethernet frames
|
|
* @update_mac: LLD-supplied function to handle changes to MAC addresses.
|
|
* @get_src_addr: LLD-supplied function to supply a source MAC address.
|
|
* @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_ctlr {
|
|
enum fip_state state;
|
|
enum fip_state mode;
|
|
struct fc_lport *lp;
|
|
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 reset_req;
|
|
u8 map_dest;
|
|
u8 spma;
|
|
u8 send_ctlr_ka;
|
|
u8 send_port_ka;
|
|
u8 dest_addr[ETH_ALEN];
|
|
u8 ctl_src_addr[ETH_ALEN];
|
|
|
|
void (*send)(struct fcoe_ctlr *, struct sk_buff *);
|
|
void (*update_mac)(struct fc_lport *, u8 *addr);
|
|
u8 * (*get_src_addr)(struct fc_lport *);
|
|
spinlock_t lock;
|
|
};
|
|
|
|
/**
|
|
* 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: selection 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;
|
|
|
|
u64 switch_name;
|
|
u64 fabric_name;
|
|
u32 fc_map;
|
|
u16 vfid;
|
|
u8 fcf_mac[ETH_ALEN];
|
|
|
|
u8 pri;
|
|
u16 flags;
|
|
u32 fka_period;
|
|
u8 fd_flags:1;
|
|
};
|
|
|
|
/* 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 fc_lport *, struct sk_buff *);
|
|
void fcoe_ctlr_recv(struct fcoe_ctlr *, struct sk_buff *);
|
|
int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *, struct fc_lport *,
|
|
struct fc_frame *);
|
|
|
|
/* libfcoe funcs */
|
|
u64 fcoe_wwn_from_mac(unsigned char mac[], unsigned int, unsigned int);
|
|
int fcoe_libfc_config(struct fc_lport *, struct libfc_function_template *);
|
|
|
|
#endif /* _LIBFCOE_H */
|