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_ */ 111