/* * Copyright(c) 2009 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 _FCOE_H_ #define _FCOE_H_ #include <linux/skbuff.h> #include <linux/kthread.h> #define FCOE_MAX_QUEUE_DEPTH 256 #define FCOE_LOW_QUEUE_DEPTH 32 #define FCOE_WORD_TO_BYTE 4 #define FCOE_VERSION "0.1" #define FCOE_NAME "fcoe" #define FCOE_VENDOR "Open-FCoE.org" #define FCOE_MAX_LUN 0xFFFF #define FCOE_MAX_FCP_TARGET 256 #define FCOE_MAX_OUTSTANDING_COMMANDS 1024 #define FCOE_MIN_XID 0x0000 /* the min xid supported by fcoe_sw */ #define FCOE_MAX_XID 0x0FFF /* the max xid supported by fcoe_sw */ /* * Max MTU for FCoE: 14 (FCoE header) + 24 (FC header) + 2112 (max FC payload) * + 4 (FC CRC) + 4 (FCoE trailer) = 2158 bytes */ #define FCOE_MTU 2158 unsigned int fcoe_debug_logging; module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); #define FCOE_LOGGING 0x01 /* General logging, not categorized */ #define FCOE_NETDEV_LOGGING 0x02 /* Netdevice logging */ #define FCOE_CHECK_LOGGING(LEVEL, CMD) \ do { \ if (unlikely(fcoe_debug_logging & LEVEL)) \ do { \ CMD; \ } while (0); \ } while (0) #define FCOE_DBG(fmt, args...) \ FCOE_CHECK_LOGGING(FCOE_LOGGING, \ printk(KERN_INFO "fcoe: " fmt, ##args);) #define FCOE_NETDEV_DBG(netdev, fmt, args...) \ FCOE_CHECK_LOGGING(FCOE_NETDEV_LOGGING, \ printk(KERN_INFO "fcoe: %s: " fmt, \ netdev->name, ##args);) /** * struct fcoe_percpu_s - The per-CPU context for FCoE receive threads * @thread: The thread context * @fcoe_rx_list: The queue of pending packets to process * @page: The memory page for calculating frame trailer CRCs * @crc_eof_offset: The offset into the CRC page pointing to available * memory for a new trailer */ struct fcoe_percpu_s { struct task_struct *thread; struct sk_buff_head fcoe_rx_list; struct page *crc_eof_page; int crc_eof_offset; }; /** * struct fcoe_interface - A FCoE interface * @list: Handle for a list of FCoE interfaces * @netdev: The associated net device * @fcoe_packet_type: FCoE packet type * @fip_packet_type: FIP packet type * @ctlr: The FCoE controller (for FIP) * @oem: The offload exchange manager for all local port * instances associated with this port * @kref: The kernel reference * * This structure is 1:1 with a net devive. */ struct fcoe_interface { struct list_head list; struct net_device *netdev; struct packet_type fcoe_packet_type; struct packet_type fip_packet_type; struct fcoe_ctlr ctlr; struct fc_exch_mgr *oem; struct kref kref; }; /** * struct fcoe_port - The FCoE private structure * @fcoe: The associated fcoe interface * @lport: The associated local port * @fcoe_pending_queue: The pending Rx queue of skbs * @fcoe_pending_queue_active: Indicates if the pending queue is active * @timer: The queue timer * @destroy_work: Handle for work context * (to prevent RTNL deadlocks) * @data_srt_addr: Source address for data * * An instance of this structure is to be allocated along with the * Scsi_Host and libfc fc_lport structures. */ struct fcoe_port { struct fcoe_interface *fcoe; struct fc_lport *lport; struct sk_buff_head fcoe_pending_queue; u8 fcoe_pending_queue_active; struct timer_list timer; struct work_struct destroy_work; u8 data_src_addr[ETH_ALEN]; }; #define fcoe_from_ctlr(fip) container_of(fip, struct fcoe_interface, ctlr) /** * fcoe_netdev() - Return the net device associated with a local port * @lport: The local port to get the net device from */ static inline struct net_device *fcoe_netdev(const struct fc_lport *lport) { return ((struct fcoe_port *)lport_priv(lport))->fcoe->netdev; } #endif /* _FCOE_H_ */