[linux-2.6-block.git] / drivers / scsi / fcoe / fcoe.h

/*
 * 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);)

/*
 * this percpu struct for fcoe
 */
struct fcoe_percpu_s {
	struct task_struct *thread;
	struct sk_buff_head fcoe_rx_list;
	struct page *crc_eof_page;
	int crc_eof_offset;
};

/*
 * an FCoE interface, 1:1 with netdev
 */
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;		/* offload exchange manager */
	struct kref kref;
};

/*
 * the FCoE private structure that's 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;		/* queue timer */
	struct work_struct destroy_work;	/* to prevent rtnl deadlocks */
	u8 data_src_addr[ETH_ALEN];
};

#define fcoe_from_ctlr(fip) container_of(fip, struct fcoe_interface, ctlr)

static inline struct net_device *fcoe_netdev(const struct fc_lport *lp)
{
	return ((struct fcoe_port *)lport_priv(lp))->fcoe->netdev;
}

#endif /* _FCOE_H_ */
Commit	Line	Data
fdd78027 VD	1	/*
	2	* Copyright(c) 2009 Intel Corporation. All rights reserved.
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms and conditions of the GNU General Public License,
	6	* version 2, as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope it will be useful, but WITHOUT
	9	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	10	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	11	* more details.
	12	*
	13	* You should have received a copy of the GNU General Public License along with
	14	* this program; if not, write to the Free Software Foundation, Inc.,
	15	* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
	16	*
	17	* Maintained at www.Open-FCoE.org
	18	*/
	19
	20	#ifndef _FCOE_H_
	21	#define _FCOE_H_
	22
	23	#include <linux/skbuff.h>
	24	#include <linux/kthread.h>
	25
	26	#define FCOE_MAX_QUEUE_DEPTH 256
	27	#define FCOE_LOW_QUEUE_DEPTH 32
	28
fdd78027 VD	29	#define FCOE_WORD_TO_BYTE 4
	30
	31	#define FCOE_VERSION "0.1"
	32	#define FCOE_NAME "fcoe"
	33	#define FCOE_VENDOR "Open-FCoE.org"
	34
2171c225	35	#define FCOE_MAX_LUN 0xFFFF
fdd78027 VD	36	#define FCOE_MAX_FCP_TARGET 256
	37
	38	#define FCOE_MAX_OUTSTANDING_COMMANDS 1024
	39
d7179680	40	#define FCOE_MIN_XID 0x0000 /* the min xid supported by fcoe_sw */
e4bc50be	41	#define FCOE_MAX_XID 0x0FFF /* the max xid supported by fcoe_sw */
fdd78027	42
7221d7e5 YZ	43	/*
	44	* Max MTU for FCoE: 14 (FCoE header) + 24 (FC header) + 2112 (max FC payload)
	45	* + 4 (FC CRC) + 4 (FCoE trailer) = 2158 bytes
	46	*/
	47	#define FCOE_MTU 2158
	48
d5488eb9 RL	49	unsigned int fcoe_debug_logging;
	50	module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO\|S_IWUSR);
	51	MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
	52
	53	#define FCOE_LOGGING 0x01 /* General logging, not categorized */
	54	#define FCOE_NETDEV_LOGGING 0x02 /* Netdevice logging */
	55
	56	#define FCOE_CHECK_LOGGING(LEVEL, CMD) \
	57	do { \
	58	if (unlikely(fcoe_debug_logging & LEVEL)) \
	59	do { \
	60	CMD; \
	61	} while (0); \
a69b06bc	62	} while (0)
d5488eb9 RL	63
	64	#define FCOE_DBG(fmt, args...) \
	65	FCOE_CHECK_LOGGING(FCOE_LOGGING, \
	66	printk(KERN_INFO "fcoe: " fmt, ##args);)
	67
	68	#define FCOE_NETDEV_DBG(netdev, fmt, args...) \
	69	FCOE_CHECK_LOGGING(FCOE_NETDEV_LOGGING, \
ee610c67	70	printk(KERN_INFO "fcoe: %s: " fmt, \
d5488eb9 RL	71	netdev->name, ##args);)
d5488eb9 RL	72
fdd78027 VD	73	/*
	74	* this percpu struct for fcoe
	75	*/
	76	struct fcoe_percpu_s {
	77	struct task_struct *thread;
	78	struct sk_buff_head fcoe_rx_list;
	79	struct page *crc_eof_page;
	80	int crc_eof_offset;
	81	};
	82
	83	/*
014f5c3f	84	* an FCoE interface, 1:1 with netdev
fdd78027	85	*/
014f5c3f	86	struct fcoe_interface {
fdd78027	87	struct list_head list;
25024989	88	struct net_device *netdev;
259ad85d CL	89	struct packet_type fcoe_packet_type;
259ad85d CL	90	struct packet_type fip_packet_type;
3fe9a0ba	91	struct fcoe_ctlr ctlr;
991cbb60	92	struct fc_exch_mgr oem; / offload exchange manager */
030f4e00	93	struct kref kref;
014f5c3f CL	94	};
	95
	96	/*
	97	* the FCoE private structure that's allocated along with the
	98	* Scsi_Host and libfc fc_lport structures
	99	*/
	100	struct fcoe_port {
	101	struct fcoe_interface *fcoe;
2e70e241	102	struct fc_lport *lport;
fdd78027 VD	103	struct sk_buff_head fcoe_pending_queue;
fdd78027 VD	104	u8 fcoe_pending_queue_active;
1047f221	105	struct timer_list timer; /* queue timer */
2e70e241	106	struct work_struct destroy_work; /* to prevent rtnl deadlocks */
11b56188	107	u8 data_src_addr[ETH_ALEN];
fdd78027 VD	108	};
fdd78027 VD	109
3fe9a0ba	110	#define fcoe_from_ctlr(fip) container_of(fip, struct fcoe_interface, ctlr)
97c8389d	111
25024989	112	static inline struct net_device fcoe_netdev(const struct fc_lport lp)
fdd78027	113	{
25024989	114	return ((struct fcoe_port *)lport_priv(lp))->fcoe->netdev;
fdd78027 VD	115	}
	116
	117	#endif /* _FCOE_H_ */