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authorRobert Love <robert.w.love@intel.com>2008-12-09 18:10:24 -0500
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-12-29 12:24:33 -0500
commit85b4aa4926a50210b683ac89326e338e7d131211 (patch)
tree127b6586573194f2d37b5a298e12c8b7d24a6fac /include
parent42e9a92fe6a9095bd68a379aaec7ad2be0337f7a (diff)
[SCSI] fcoe: Fibre Channel over Ethernet
Encapsulation protocol for running Fibre Channel over Ethernet interfaces. Creates virtual Fibre Channel host adapters using libfc. This layer is the LLD to the scsi-ml. It allocates the Scsi_Host, utilizes libfc for Fibre Channel protocol processing and interacts with netdev to send/receive Ethernet packets. Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'include')
-rw-r--r--include/scsi/fc_transport_fcoe.h54
-rw-r--r--include/scsi/libfcoe.h176
2 files changed, 230 insertions, 0 deletions
diff --git a/include/scsi/fc_transport_fcoe.h b/include/scsi/fc_transport_fcoe.h
new file mode 100644
index 000000000000..8dca2af14ffc
--- /dev/null
+++ b/include/scsi/fc_transport_fcoe.h
@@ -0,0 +1,54 @@
1#ifndef FC_TRANSPORT_FCOE_H
2#define FC_TRANSPORT_FCOE_H
3
4#include <linux/device.h>
5#include <linux/netdevice.h>
6#include <scsi/scsi_host.h>
7#include <scsi/libfc.h>
8
9/**
10 * struct fcoe_transport - FCoE transport struct for generic transport
11 * for Ethernet devices as well as pure HBAs
12 *
13 * @name: name for thsi transport
14 * @bus: physical bus type (pci_bus_type)
15 * @driver: physical bus driver for network device
16 * @create: entry create function
17 * @destroy: exit destroy function
18 * @list: list of transports
19 */
20struct fcoe_transport {
21 char *name;
22 unsigned short vendor;
23 unsigned short device;
24 struct bus_type *bus;
25 struct device_driver *driver;
26 int (*create)(struct net_device *device);
27 int (*destroy)(struct net_device *device);
28 bool (*match)(struct net_device *device);
29 struct list_head list;
30 struct list_head devlist;
31 struct mutex devlock;
32};
33
34/**
35 * MODULE_ALIAS_FCOE_PCI
36 *
37 * some care must be taken with this, vendor and device MUST be a hex value
38 * preceded with 0x and with letters in lower case (0x12ab, not 0x12AB or 12AB)
39 */
40#define MODULE_ALIAS_FCOE_PCI(vendor, device) \
41 MODULE_ALIAS("fcoe-pci-" __stringify(vendor) "-" __stringify(device))
42
43/* exported funcs */
44int fcoe_transport_attach(struct net_device *netdev);
45int fcoe_transport_release(struct net_device *netdev);
46int fcoe_transport_register(struct fcoe_transport *t);
47int fcoe_transport_unregister(struct fcoe_transport *t);
48int fcoe_load_transport_driver(struct net_device *netdev);
49int __init fcoe_transport_init(void);
50int __exit fcoe_transport_exit(void);
51
52/* fcow_sw is the default transport */
53extern struct fcoe_transport fcoe_sw_transport;
54#endif /* FC_TRANSPORT_FCOE_H */
diff --git a/include/scsi/libfcoe.h b/include/scsi/libfcoe.h
new file mode 100644
index 000000000000..89fdbb9a6a1b
--- /dev/null
+++ b/include/scsi/libfcoe.h
@@ -0,0 +1,176 @@
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 */
31struct 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 */
42struct 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
61static inline struct fcoe_softc *fcoe_softc(
62 const struct fc_lport *lp)
63{
64 return (struct fcoe_softc *)lport_priv(lp);
65}
66
67static inline struct net_device *fcoe_netdev(
68 const struct fc_lport *lp)
69{
70 return fcoe_softc(lp)->real_dev;
71}
72
73static inline struct fcoe_hdr *skb_fcoe_header(const struct sk_buff *skb)
74{
75 return (struct fcoe_hdr *)skb_network_header(skb);
76}
77
78static inline int skb_fcoe_offset(const struct sk_buff *skb)
79{
80 return skb_network_offset(skb);
81}
82
83static 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
88static inline int skb_fc_offset(const struct sk_buff *skb)
89{
90 return skb_transport_offset(skb);
91}
92
93static 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
100static 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
105static 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
110static 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
117static 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
122static 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
127static 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)
136static 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
143static 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 */
151int fcoe_reset(struct Scsi_Host *shost);
152u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN],
153 unsigned int scheme, unsigned int port);
154
155u32 fcoe_fc_crc(struct fc_frame *fp);
156int fcoe_xmit(struct fc_lport *, struct fc_frame *);
157int fcoe_rcv(struct sk_buff *, struct net_device *,
158 struct packet_type *, struct net_device *);
159
160int fcoe_percpu_receive_thread(void *arg);
161void fcoe_clean_pending_queue(struct fc_lport *lp);
162void fcoe_percpu_clean(struct fc_lport *lp);
163void fcoe_watchdog(ulong vp);
164int fcoe_link_ok(struct fc_lport *lp);
165
166struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
167int fcoe_hostlist_add(const struct fc_lport *);
168int fcoe_hostlist_remove(const struct fc_lport *);
169
170struct Scsi_Host *fcoe_host_alloc(struct scsi_host_template *, int);
171int fcoe_libfc_config(struct fc_lport *, struct libfc_function_template *);
172
173/* fcoe sw hba */
174int __init fcoe_sw_init(void);
175int __exit fcoe_sw_exit(void);
176#endif /* _LIBFCOE_H */