147 строки
4.5 KiB
C
147 строки
4.5 KiB
C
/*
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* Copyright(c) 2009 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Maintained at www.Open-FCoE.org
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*/
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#ifndef _FCOE_H_
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#define _FCOE_H_
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#include <linux/skbuff.h>
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#include <linux/kthread.h>
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#define FCOE_MAX_QUEUE_DEPTH 256
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#define FCOE_LOW_QUEUE_DEPTH 32
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#define FCOE_WORD_TO_BYTE 4
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#define FCOE_VERSION "0.1"
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#define FCOE_NAME "fcoe"
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#define FCOE_VENDOR "Open-FCoE.org"
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#define FCOE_MAX_LUN 0xFFFF
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#define FCOE_MAX_FCP_TARGET 256
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#define FCOE_MAX_OUTSTANDING_COMMANDS 1024
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#define FCOE_MIN_XID 0x0000 /* the min xid supported by fcoe_sw */
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#define FCOE_MAX_XID 0x0FFF /* the max xid supported by fcoe_sw */
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/*
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* Max MTU for FCoE: 14 (FCoE header) + 24 (FC header) + 2112 (max FC payload)
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* + 4 (FC CRC) + 4 (FCoE trailer) = 2158 bytes
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*/
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#define FCOE_MTU 2158
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unsigned int fcoe_debug_logging;
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module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);
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MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
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#define FCOE_LOGGING 0x01 /* General logging, not categorized */
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#define FCOE_NETDEV_LOGGING 0x02 /* Netdevice logging */
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#define FCOE_CHECK_LOGGING(LEVEL, CMD) \
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do { \
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if (unlikely(fcoe_debug_logging & LEVEL)) \
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do { \
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CMD; \
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} while (0); \
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} while (0)
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#define FCOE_DBG(fmt, args...) \
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FCOE_CHECK_LOGGING(FCOE_LOGGING, \
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printk(KERN_INFO "fcoe: " fmt, ##args);)
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#define FCOE_NETDEV_DBG(netdev, fmt, args...) \
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FCOE_CHECK_LOGGING(FCOE_NETDEV_LOGGING, \
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printk(KERN_INFO "fcoe: %s: " fmt, \
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netdev->name, ##args);)
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/**
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* struct fcoe_percpu_s - The per-CPU context for FCoE receive threads
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* @thread: The thread context
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* @fcoe_rx_list: The queue of pending packets to process
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* @page: The memory page for calculating frame trailer CRCs
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* @crc_eof_offset: The offset into the CRC page pointing to available
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* memory for a new trailer
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*/
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struct fcoe_percpu_s {
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struct task_struct *thread;
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struct sk_buff_head fcoe_rx_list;
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struct page *crc_eof_page;
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int crc_eof_offset;
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};
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/**
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* struct fcoe_interface - A FCoE interface
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* @list: Handle for a list of FCoE interfaces
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* @netdev: The associated net device
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* @fcoe_packet_type: FCoE packet type
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* @fip_packet_type: FIP packet type
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* @ctlr: The FCoE controller (for FIP)
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* @oem: The offload exchange manager for all local port
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* instances associated with this port
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* @kref: The kernel reference
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*
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* This structure is 1:1 with a net devive.
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*/
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struct fcoe_interface {
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struct list_head list;
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struct net_device *netdev;
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struct packet_type fcoe_packet_type;
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struct packet_type fip_packet_type;
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struct fcoe_ctlr ctlr;
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struct fc_exch_mgr *oem;
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struct kref kref;
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};
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/**
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* struct fcoe_port - The FCoE private structure
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* @fcoe: The associated fcoe interface
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* @lport: The associated local port
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* @fcoe_pending_queue: The pending Rx queue of skbs
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* @fcoe_pending_queue_active: Indicates if the pending queue is active
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* @timer: The queue timer
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* @destroy_work: Handle for work context
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* (to prevent RTNL deadlocks)
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* @data_srt_addr: Source address for data
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*
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* An instance of this structure is to be allocated along with the
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* Scsi_Host and libfc fc_lport structures.
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*/
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struct fcoe_port {
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struct fcoe_interface *fcoe;
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struct fc_lport *lport;
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struct sk_buff_head fcoe_pending_queue;
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u8 fcoe_pending_queue_active;
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struct timer_list timer;
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struct work_struct destroy_work;
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u8 data_src_addr[ETH_ALEN];
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};
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#define fcoe_from_ctlr(fip) container_of(fip, struct fcoe_interface, ctlr)
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/**
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* fcoe_netdev() - Return the net device associated with a local port
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* @lport: The local port to get the net device from
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*/
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static inline struct net_device *fcoe_netdev(const struct fc_lport *lport)
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{
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return ((struct fcoe_port *)lport_priv(lport))->fcoe->netdev;
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}
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#endif /* _FCOE_H_ */
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