Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame^] | 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 | |
| 50 | u8 dest_addr[ETH_ALEN]; |
| 51 | u8 ctl_src_addr[ETH_ALEN]; |
| 52 | u8 data_src_addr[ETH_ALEN]; |
| 53 | /* |
| 54 | * fcoe protocol address learning related stuff |
| 55 | */ |
| 56 | u16 flogi_oxid; |
| 57 | u8 flogi_progress; |
| 58 | u8 address_mode; |
| 59 | }; |
| 60 | |
| 61 | static inline struct fcoe_softc *fcoe_softc( |
| 62 | const struct fc_lport *lp) |
| 63 | { |
| 64 | return (struct fcoe_softc *)lport_priv(lp); |
| 65 | } |
| 66 | |
| 67 | static inline struct net_device *fcoe_netdev( |
| 68 | const struct fc_lport *lp) |
| 69 | { |
| 70 | return fcoe_softc(lp)->real_dev; |
| 71 | } |
| 72 | |
| 73 | static inline struct fcoe_hdr *skb_fcoe_header(const struct sk_buff *skb) |
| 74 | { |
| 75 | return (struct fcoe_hdr *)skb_network_header(skb); |
| 76 | } |
| 77 | |
| 78 | static inline int skb_fcoe_offset(const struct sk_buff *skb) |
| 79 | { |
| 80 | return skb_network_offset(skb); |
| 81 | } |
| 82 | |
| 83 | static inline struct fc_frame_header *skb_fc_header(const struct sk_buff *skb) |
| 84 | { |
| 85 | return (struct fc_frame_header *)skb_transport_header(skb); |
| 86 | } |
| 87 | |
| 88 | static inline int skb_fc_offset(const struct sk_buff *skb) |
| 89 | { |
| 90 | return skb_transport_offset(skb); |
| 91 | } |
| 92 | |
| 93 | static inline void skb_reset_fc_header(struct sk_buff *skb) |
| 94 | { |
| 95 | skb_reset_network_header(skb); |
| 96 | skb_set_transport_header(skb, skb_network_offset(skb) + |
| 97 | sizeof(struct fcoe_hdr)); |
| 98 | } |
| 99 | |
| 100 | static inline bool skb_fc_is_data(const struct sk_buff *skb) |
| 101 | { |
| 102 | return skb_fc_header(skb)->fh_r_ctl == FC_RCTL_DD_SOL_DATA; |
| 103 | } |
| 104 | |
| 105 | static inline bool skb_fc_is_cmd(const struct sk_buff *skb) |
| 106 | { |
| 107 | return skb_fc_header(skb)->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD; |
| 108 | } |
| 109 | |
| 110 | static inline bool skb_fc_has_exthdr(const struct sk_buff *skb) |
| 111 | { |
| 112 | return (skb_fc_header(skb)->fh_r_ctl == FC_RCTL_VFTH) || |
| 113 | (skb_fc_header(skb)->fh_r_ctl == FC_RCTL_IFRH) || |
| 114 | (skb_fc_header(skb)->fh_r_ctl == FC_RCTL_ENCH); |
| 115 | } |
| 116 | |
| 117 | static inline bool skb_fc_is_roff(const struct sk_buff *skb) |
| 118 | { |
| 119 | return skb_fc_header(skb)->fh_f_ctl[2] & FC_FC_REL_OFF; |
| 120 | } |
| 121 | |
| 122 | static inline u16 skb_fc_oxid(const struct sk_buff *skb) |
| 123 | { |
| 124 | return be16_to_cpu(skb_fc_header(skb)->fh_ox_id); |
| 125 | } |
| 126 | |
| 127 | static inline u16 skb_fc_rxid(const struct sk_buff *skb) |
| 128 | { |
| 129 | return be16_to_cpu(skb_fc_header(skb)->fh_rx_id); |
| 130 | } |
| 131 | |
| 132 | /* FIXME - DMA_BIDIRECTIONAL ? */ |
| 133 | #define skb_cb(skb) ((struct fcoe_rcv_info *)&((skb)->cb[0])) |
| 134 | #define skb_cmd(skb) (skb_cb(skb)->fr_cmd) |
| 135 | #define skb_dir(skb) (skb_cmd(skb)->sc_data_direction) |
| 136 | static inline bool skb_fc_is_read(const struct sk_buff *skb) |
| 137 | { |
| 138 | if (skb_fc_is_cmd(skb) && skb_cmd(skb)) |
| 139 | return skb_dir(skb) == DMA_FROM_DEVICE; |
| 140 | return false; |
| 141 | } |
| 142 | |
| 143 | static inline bool skb_fc_is_write(const struct sk_buff *skb) |
| 144 | { |
| 145 | if (skb_fc_is_cmd(skb) && skb_cmd(skb)) |
| 146 | return skb_dir(skb) == DMA_TO_DEVICE; |
| 147 | return false; |
| 148 | } |
| 149 | |
| 150 | /* libfcoe funcs */ |
| 151 | int fcoe_reset(struct Scsi_Host *shost); |
| 152 | u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN], |
| 153 | unsigned int scheme, unsigned int port); |
| 154 | |
| 155 | u32 fcoe_fc_crc(struct fc_frame *fp); |
| 156 | int fcoe_xmit(struct fc_lport *, struct fc_frame *); |
| 157 | int fcoe_rcv(struct sk_buff *, struct net_device *, |
| 158 | struct packet_type *, struct net_device *); |
| 159 | |
| 160 | int fcoe_percpu_receive_thread(void *arg); |
| 161 | void fcoe_clean_pending_queue(struct fc_lport *lp); |
| 162 | void fcoe_percpu_clean(struct fc_lport *lp); |
| 163 | void fcoe_watchdog(ulong vp); |
| 164 | int fcoe_link_ok(struct fc_lport *lp); |
| 165 | |
| 166 | struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); |
| 167 | int fcoe_hostlist_add(const struct fc_lport *); |
| 168 | int fcoe_hostlist_remove(const struct fc_lport *); |
| 169 | |
| 170 | struct Scsi_Host *fcoe_host_alloc(struct scsi_host_template *, int); |
| 171 | int fcoe_libfc_config(struct fc_lport *, struct libfc_function_template *); |
| 172 | |
| 173 | /* fcoe sw hba */ |
| 174 | int __init fcoe_sw_init(void); |
| 175 | int __exit fcoe_sw_exit(void); |
| 176 | #endif /* _LIBFCOE_H */ |