1 /* 2 * Copyright(c) 2007 - 2008 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 _LIBFCOE_H 21 #define _LIBFCOE_H 22 23 #include <linux/netdevice.h> 24 #include <linux/skbuff.h> 25 #include <scsi/fc/fc_fcoe.h> 26 #include <scsi/libfc.h> 27 28 /* 29 * this percpu struct for fcoe 30 */ 31 struct fcoe_percpu_s { 32 int cpu; 33 struct task_struct *thread; 34 struct sk_buff_head fcoe_rx_list; 35 struct page *crc_eof_page; 36 int crc_eof_offset; 37 }; 38 39 /* 40 * the fcoe sw transport private data 41 */ 42 struct fcoe_softc { 43 struct list_head list; 44 struct fc_lport *lp; 45 struct net_device *real_dev; 46 struct net_device *phys_dev; /* device with ethtool_ops */ 47 struct packet_type fcoe_packet_type; 48 struct sk_buff_head fcoe_pending_queue; 49 u8 fcoe_pending_queue_active; 50 51 u8 dest_addr[ETH_ALEN]; 52 u8 ctl_src_addr[ETH_ALEN]; 53 u8 data_src_addr[ETH_ALEN]; 54 /* 55 * fcoe protocol address learning related stuff 56 */ 57 u16 flogi_oxid; 58 u8 flogi_progress; 59 u8 address_mode; 60 }; 61 62 static inline struct net_device *fcoe_netdev( 63 const struct fc_lport *lp) 64 { 65 return ((struct fcoe_softc *)lport_priv(lp))->real_dev; 66 } 67 68 static inline struct fcoe_hdr *skb_fcoe_header(const struct sk_buff *skb) 69 { 70 return (struct fcoe_hdr *)skb_network_header(skb); 71 } 72 73 static inline int skb_fcoe_offset(const struct sk_buff *skb) 74 { 75 return skb_network_offset(skb); 76 } 77 78 static inline struct fc_frame_header *skb_fc_header(const struct sk_buff *skb) 79 { 80 return (struct fc_frame_header *)skb_transport_header(skb); 81 } 82 83 static inline int skb_fc_offset(const struct sk_buff *skb) 84 { 85 return skb_transport_offset(skb); 86 } 87 88 static inline void skb_reset_fc_header(struct sk_buff *skb) 89 { 90 skb_reset_network_header(skb); 91 skb_set_transport_header(skb, skb_network_offset(skb) + 92 sizeof(struct fcoe_hdr)); 93 } 94 95 static inline bool skb_fc_is_data(const struct sk_buff *skb) 96 { 97 return skb_fc_header(skb)->fh_r_ctl == FC_RCTL_DD_SOL_DATA; 98 } 99 100 static inline bool skb_fc_is_cmd(const struct sk_buff *skb) 101 { 102 return skb_fc_header(skb)->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD; 103 } 104 105 static inline bool skb_fc_has_exthdr(const struct sk_buff *skb) 106 { 107 return (skb_fc_header(skb)->fh_r_ctl == FC_RCTL_VFTH) || 108 (skb_fc_header(skb)->fh_r_ctl == FC_RCTL_IFRH) || 109 (skb_fc_header(skb)->fh_r_ctl == FC_RCTL_ENCH); 110 } 111 112 static inline bool skb_fc_is_roff(const struct sk_buff *skb) 113 { 114 return skb_fc_header(skb)->fh_f_ctl[2] & FC_FC_REL_OFF; 115 } 116 117 static inline u16 skb_fc_oxid(const struct sk_buff *skb) 118 { 119 return be16_to_cpu(skb_fc_header(skb)->fh_ox_id); 120 } 121 122 static inline u16 skb_fc_rxid(const struct sk_buff *skb) 123 { 124 return be16_to_cpu(skb_fc_header(skb)->fh_rx_id); 125 } 126 127 /* FIXME - DMA_BIDIRECTIONAL ? */ 128 #define skb_cb(skb) ((struct fcoe_rcv_info *)&((skb)->cb[0])) 129 #define skb_cmd(skb) (skb_cb(skb)->fr_cmd) 130 #define skb_dir(skb) (skb_cmd(skb)->sc_data_direction) 131 static inline bool skb_fc_is_read(const struct sk_buff *skb) 132 { 133 if (skb_fc_is_cmd(skb) && skb_cmd(skb)) 134 return skb_dir(skb) == DMA_FROM_DEVICE; 135 return false; 136 } 137 138 static inline bool skb_fc_is_write(const struct sk_buff *skb) 139 { 140 if (skb_fc_is_cmd(skb) && skb_cmd(skb)) 141 return skb_dir(skb) == DMA_TO_DEVICE; 142 return false; 143 } 144 145 /* libfcoe funcs */ 146 int fcoe_reset(struct Scsi_Host *shost); 147 u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN], 148 unsigned int scheme, unsigned int port); 149 150 u32 fcoe_fc_crc(struct fc_frame *fp); 151 int fcoe_xmit(struct fc_lport *, struct fc_frame *); 152 int fcoe_rcv(struct sk_buff *, struct net_device *, 153 struct packet_type *, struct net_device *); 154 155 int fcoe_percpu_receive_thread(void *arg); 156 void fcoe_clean_pending_queue(struct fc_lport *lp); 157 void fcoe_percpu_clean(struct fc_lport *lp); 158 void fcoe_watchdog(ulong vp); 159 int fcoe_link_ok(struct fc_lport *lp); 160 161 struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); 162 int fcoe_hostlist_add(const struct fc_lport *); 163 int fcoe_hostlist_remove(const struct fc_lport *); 164 165 struct Scsi_Host *fcoe_host_alloc(struct scsi_host_template *, int); 166 int fcoe_libfc_config(struct fc_lport *, struct libfc_function_template *); 167 168 /* fcoe sw hba */ 169 int __init fcoe_sw_init(void); 170 int __exit fcoe_sw_exit(void); 171 #endif /* _LIBFCOE_H */ 172