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/*
* 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_ */
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