drivers/scsi/fcoe/fcoe.h

   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
  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
  35 #define FCOE_MAX_LUN            255
  36 #define FCOE_MAX_FCP_TARGET     256
  37
  38 #define FCOE_MAX_OUTSTANDING_COMMANDS   1024
  39
  40 #define FCOE_MIN_XID            0x0000  /* the min xid supported by fcoe_sw */
  41 #define FCOE_MAX_XID            0x0FFF  /* the max xid supported by fcoe_sw */
  42
  43 unsigned int fcoe_debug_logging;
  44 module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);
  45 MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
  46
  47 #define FCOE_LOGGING        0x01 /* General logging, not categorized */
  48 #define FCOE_NETDEV_LOGGING 0x02 /* Netdevice logging */
  49
  50 #define FCOE_CHECK_LOGGING(LEVEL, CMD)                                  \
  51 do {                                                                    \
  52         if (unlikely(fcoe_debug_logging & LEVEL))                       \
  53                 do {                                                    \
  54                         CMD;                                            \
  55                 } while (0);                                            \
  56 } while (0)
  57
  58 #define FCOE_DBG(fmt, args...)                                          \
  59         FCOE_CHECK_LOGGING(FCOE_LOGGING,                                \
  60                            printk(KERN_INFO "fcoe: " fmt, ##args);)
  61
  62 #define FCOE_NETDEV_DBG(netdev, fmt, args...)                   \
  63         FCOE_CHECK_LOGGING(FCOE_NETDEV_LOGGING,                 \
  64                            printk(KERN_INFO "fcoe: %s: " fmt,   \
  65                                   netdev->name, ##args);)
  66
  67 /*
  68  * this percpu struct for fcoe
  69  */
  70 struct fcoe_percpu_s {
  71         struct task_struct *thread;
  72         struct sk_buff_head fcoe_rx_list;
  73         struct page *crc_eof_page;
  74         int crc_eof_offset;
  75 };
  76
  77 /*
  78  * an FCoE interface, 1:1 with netdev
  79  */
  80 struct fcoe_interface {
  81         struct list_head list;
  82         struct net_device *netdev;
  83         struct packet_type  fcoe_packet_type;
  84         struct packet_type  fip_packet_type;
  85         struct fcoe_ctlr ctlr;
  86         struct fc_exch_mgr *oem;                /* offload exchange manager */
  87         struct kref kref;
  88 };
  89
  90 /*
  91  * the FCoE private structure that's allocated along with the
  92  * Scsi_Host and libfc fc_lport structures
  93  */
  94 struct fcoe_port {
  95         struct fcoe_interface *fcoe;
  96         struct fc_lport *lport;
  97         struct sk_buff_head fcoe_pending_queue;
  98         u8      fcoe_pending_queue_active;
  99         struct timer_list timer;                /* queue timer */
 100         struct work_struct destroy_work;        /* to prevent rtnl deadlocks */
 101 };
 102
 103 #define fcoe_from_ctlr(fip) container_of(fip, struct fcoe_interface, ctlr)
 104
 105 static inline struct net_device *fcoe_netdev(const struct fc_lport *lp)
 106 {
 107         return ((struct fcoe_port *)lport_priv(lp))->fcoe->netdev;
 108 }
 109
 110 #endif /* _FCOE_H_ */