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a61127c2 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
85b4aa49 | 2 | /* |
97c8389d JE |
3 | * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved. |
4 | * Copyright (c) 2007-2008 Intel Corporation. All rights reserved. | |
85b4aa49 | 5 | * |
85b4aa49 RL |
6 | * Maintained at www.Open-FCoE.org |
7 | */ | |
8 | ||
9 | #ifndef _LIBFCOE_H | |
10 | #define _LIBFCOE_H | |
11 | ||
97c8389d JE |
12 | #include <linux/etherdevice.h> |
13 | #include <linux/if_ether.h> | |
85b4aa49 RL |
14 | #include <linux/netdevice.h> |
15 | #include <linux/skbuff.h> | |
97c8389d | 16 | #include <linux/workqueue.h> |
848b8977 | 17 | #include <linux/local_lock.h> |
e10f8c66 | 18 | #include <linux/random.h> |
85b4aa49 RL |
19 | #include <scsi/fc/fc_fcoe.h> |
20 | #include <scsi/libfc.h> | |
9a74e884 | 21 | #include <scsi/fcoe_sysfs.h> |
85b4aa49 | 22 | |
da87bfab VD |
23 | #define FCOE_MAX_CMD_LEN 16 /* Supported CDB length */ |
24 | ||
f4d2b2b6 BPG |
25 | /* |
26 | * Max MTU for FCoE: 14 (FCoE header) + 24 (FC header) + 2112 (max FC payload) | |
27 | * + 4 (FC CRC) + 4 (FCoE trailer) = 2158 bytes | |
28 | */ | |
29 | #define FCOE_MTU 2158 | |
30 | ||
97c8389d JE |
31 | /* |
32 | * FIP tunable parameters. | |
33 | */ | |
34 | #define FCOE_CTLR_START_DELAY 2000 /* mS after first adv. to choose FCF */ | |
5523ca8f | 35 | #define FCOE_CTLR_SOL_TOV 2000 /* min. solicitation interval (mS) */ |
97c8389d | 36 | #define FCOE_CTLR_FCF_LIMIT 20 /* max. number of FCF entries */ |
e10f8c66 | 37 | #define FCOE_CTLR_VN2VN_LOGIN_LIMIT 3 /* max. VN2VN rport login retries */ |
97c8389d JE |
38 | |
39 | /** | |
40 | * enum fip_state - internal state of FCoE controller. | |
41 | * @FIP_ST_DISABLED: controller has been disabled or not yet enabled. | |
42 | * @FIP_ST_LINK_WAIT: the physical link is down or unusable. | |
43 | * @FIP_ST_AUTO: determining whether to use FIP or non-FIP mode. | |
44 | * @FIP_ST_NON_FIP: non-FIP mode selected. | |
45 | * @FIP_ST_ENABLED: FIP mode selected. | |
e10f8c66 JE |
46 | * @FIP_ST_VNMP_START: VN2VN multipath mode start, wait |
47 | * @FIP_ST_VNMP_PROBE1: VN2VN sent first probe, listening | |
48 | * @FIP_ST_VNMP_PROBE2: VN2VN sent second probe, listening | |
49 | * @FIP_ST_VNMP_CLAIM: VN2VN sent claim, waiting for responses | |
50 | * @FIP_ST_VNMP_UP: VN2VN multipath mode operation | |
97c8389d JE |
51 | */ |
52 | enum fip_state { | |
53 | FIP_ST_DISABLED, | |
54 | FIP_ST_LINK_WAIT, | |
55 | FIP_ST_AUTO, | |
56 | FIP_ST_NON_FIP, | |
57 | FIP_ST_ENABLED, | |
e10f8c66 JE |
58 | FIP_ST_VNMP_START, |
59 | FIP_ST_VNMP_PROBE1, | |
60 | FIP_ST_VNMP_PROBE2, | |
61 | FIP_ST_VNMP_CLAIM, | |
62 | FIP_ST_VNMP_UP, | |
97c8389d JE |
63 | }; |
64 | ||
3d902ac0 JE |
65 | /* |
66 | * Modes: | |
67 | * The mode is the state that is to be entered after link up. | |
68 | * It must not change after fcoe_ctlr_init() sets it. | |
69 | */ | |
1917d42d | 70 | enum fip_mode { |
8beb90aa | 71 | FIP_MODE_AUTO, |
1917d42d HR |
72 | FIP_MODE_NON_FIP, |
73 | FIP_MODE_FABRIC, | |
74 | FIP_MODE_VN2VN, | |
75 | }; | |
3d902ac0 | 76 | |
97c8389d | 77 | /** |
70b51aab RL |
78 | * struct fcoe_ctlr - FCoE Controller and FIP state |
79 | * @state: internal FIP state for network link and FIP or non-FIP mode. | |
22bcd225 | 80 | * @mode: LLD-selected mode. |
70b51aab RL |
81 | * @lp: &fc_lport: libfc local port. |
82 | * @sel_fcf: currently selected FCF, or NULL. | |
83 | * @fcfs: list of discovered FCFs. | |
9d34876f | 84 | * @cdev: (Optional) pointer to sysfs fcoe_ctlr_device. |
70b51aab RL |
85 | * @fcf_count: number of discovered FCF entries. |
86 | * @sol_time: time when a multicast solicitation was last sent. | |
87 | * @sel_time: time after which to select an FCF. | |
88 | * @port_ka_time: time of next port keep-alive. | |
89 | * @ctlr_ka_time: time of next controller keep-alive. | |
90 | * @timer: timer struct used for all delayed events. | |
42913657 | 91 | * @timer_work: &work_struct for doing keep-alives and resets. |
70b51aab | 92 | * @recv_work: &work_struct for receiving FIP frames. |
97c8389d | 93 | * @fip_recv_list: list of received FIP frames. |
794d98e7 | 94 | * @flogi_req: clone of FLOGI request sent |
e10f8c66 JE |
95 | * @rnd_state: state for pseudo-random number generator. |
96 | * @port_id: proposed or selected local-port ID. | |
70b51aab RL |
97 | * @user_mfs: configured maximum FC frame size, including FC header. |
98 | * @flogi_oxid: exchange ID of most recent fabric login. | |
794d98e7 | 99 | * @flogi_req_send: send of FLOGI requested |
70b51aab | 100 | * @flogi_count: number of FLOGI attempts in AUTO mode. |
70b51aab | 101 | * @map_dest: use the FC_MAP mode for destination MAC addresses. |
9a6cf881 | 102 | * @fip_resp: start FIP VLAN discovery responder |
70b51aab | 103 | * @spma: supports SPMA server-provided MACs mode |
e10f8c66 | 104 | * @probe_tries: number of FC_IDs probed |
9a6cf881 | 105 | * @priority: DCBx FCoE APP priority |
70b51aab RL |
106 | * @dest_addr: MAC address of the selected FC forwarder. |
107 | * @ctl_src_addr: the native MAC address of our local port. | |
108 | * @send: LLD-supplied function to handle sending FIP Ethernet frames | |
109 | * @update_mac: LLD-supplied function to handle changes to MAC addresses. | |
110 | * @get_src_addr: LLD-supplied function to supply a source MAC address. | |
fdb068c6 | 111 | * @ctlr_mutex: lock protecting this structure. |
794d98e7 | 112 | * @ctlr_lock: spinlock covering flogi_req |
97c8389d JE |
113 | * |
114 | * This structure is used by all FCoE drivers. It contains information | |
115 | * needed by all FCoE low-level drivers (LLDs) as well as internal state | |
116 | * for FIP, and fields shared with the LLDS. | |
117 | */ | |
118 | struct fcoe_ctlr { | |
119 | enum fip_state state; | |
1917d42d | 120 | enum fip_mode mode; |
97c8389d JE |
121 | struct fc_lport *lp; |
122 | struct fcoe_fcf *sel_fcf; | |
123 | struct list_head fcfs; | |
9d34876f | 124 | struct fcoe_ctlr_device *cdev; |
97c8389d JE |
125 | u16 fcf_count; |
126 | unsigned long sol_time; | |
127 | unsigned long sel_time; | |
128 | unsigned long port_ka_time; | |
129 | unsigned long ctlr_ka_time; | |
130 | struct timer_list timer; | |
42913657 | 131 | struct work_struct timer_work; |
97c8389d JE |
132 | struct work_struct recv_work; |
133 | struct sk_buff_head fip_recv_list; | |
794d98e7 | 134 | struct sk_buff *flogi_req; |
e10f8c66 JE |
135 | |
136 | struct rnd_state rnd_state; | |
137 | u32 port_id; | |
138 | ||
97c8389d JE |
139 | u16 user_mfs; |
140 | u16 flogi_oxid; | |
794d98e7 | 141 | u8 flogi_req_send; |
97c8389d | 142 | u8 flogi_count; |
9a6cf881 HR |
143 | bool map_dest; |
144 | bool fip_resp; | |
184dd345 | 145 | u8 spma; |
e10f8c66 | 146 | u8 probe_tries; |
6f6c2aa3 | 147 | u8 priority; |
97c8389d JE |
148 | u8 dest_addr[ETH_ALEN]; |
149 | u8 ctl_src_addr[ETH_ALEN]; | |
97c8389d JE |
150 | |
151 | void (*send)(struct fcoe_ctlr *, struct sk_buff *); | |
11b56188 CL |
152 | void (*update_mac)(struct fc_lport *, u8 *addr); |
153 | u8 * (*get_src_addr)(struct fc_lport *); | |
fdb068c6 | 154 | struct mutex ctlr_mutex; |
794d98e7 | 155 | spinlock_t ctlr_lock; |
97c8389d JE |
156 | }; |
157 | ||
619fe4be RL |
158 | /** |
159 | * fcoe_ctlr_priv() - Return the private data from a fcoe_ctlr | |
160 | * @cltr: The fcoe_ctlr whose private data will be returned | |
161 | */ | |
162 | static inline void *fcoe_ctlr_priv(const struct fcoe_ctlr *ctlr) | |
163 | { | |
164 | return (void *)(ctlr + 1); | |
165 | } | |
166 | ||
9d34876f RL |
167 | /* |
168 | * This assumes that the fcoe_ctlr (x) is allocated with the fcoe_ctlr_device. | |
169 | */ | |
8d55e507 | 170 | #define fcoe_ctlr_to_ctlr_dev(x) \ |
9d34876f | 171 | (x)->cdev |
8d55e507 | 172 | |
70b51aab RL |
173 | /** |
174 | * struct fcoe_fcf - Fibre-Channel Forwarder | |
175 | * @list: list linkage | |
8d55e507 RL |
176 | * @event_work: Work for FC Transport actions queue |
177 | * @event: The event to be processed | |
178 | * @fip: The controller that the FCF was discovered on | |
179 | * @fcf_dev: The associated fcoe_fcf_device instance | |
70b51aab RL |
180 | * @time: system time (jiffies) when an advertisement was last received |
181 | * @switch_name: WWN of switch from advertisement | |
182 | * @fabric_name: WWN of fabric from advertisement | |
183 | * @fc_map: FC_MAP value from advertisement | |
81c11dd2 BPG |
184 | * @fcf_mac: Ethernet address of the FCF for FIP traffic |
185 | * @fcoe_mac: Ethernet address of the FCF for FCoE traffic | |
70b51aab RL |
186 | * @vfid: virtual fabric ID |
187 | * @pri: selection priority, smaller values are better | |
794d98e7 | 188 | * @flogi_sent: current FLOGI sent to this FCF |
70b51aab RL |
189 | * @flags: flags received from advertisement |
190 | * @fka_period: keep-alive period, in jiffies | |
97c8389d JE |
191 | * |
192 | * A Fibre-Channel Forwarder (FCF) is the entity on the Ethernet that | |
193 | * passes FCoE frames on to an FC fabric. This structure represents | |
194 | * one FCF from which advertisements have been received. | |
195 | * | |
196 | * When looking up an FCF, @switch_name, @fabric_name, @fc_map, @vfid, and | |
197 | * @fcf_mac together form the lookup key. | |
198 | */ | |
199 | struct fcoe_fcf { | |
200 | struct list_head list; | |
8d55e507 RL |
201 | struct work_struct event_work; |
202 | struct fcoe_ctlr *fip; | |
203 | struct fcoe_fcf_device *fcf_dev; | |
97c8389d JE |
204 | unsigned long time; |
205 | ||
206 | u64 switch_name; | |
207 | u64 fabric_name; | |
208 | u32 fc_map; | |
209 | u16 vfid; | |
210 | u8 fcf_mac[ETH_ALEN]; | |
81c11dd2 | 211 | u8 fcoe_mac[ETH_ALEN]; |
97c8389d JE |
212 | |
213 | u8 pri; | |
794d98e7 | 214 | u8 flogi_sent; |
97c8389d JE |
215 | u16 flags; |
216 | u32 fka_period; | |
8cdffdcc | 217 | u8 fd_flags:1; |
97c8389d JE |
218 | }; |
219 | ||
8d55e507 RL |
220 | #define fcoe_fcf_to_fcf_dev(x) \ |
221 | ((x)->fcf_dev) | |
222 | ||
e10f8c66 JE |
223 | /** |
224 | * struct fcoe_rport - VN2VN remote port | |
225 | * @time: time of create or last beacon packet received from node | |
226 | * @fcoe_len: max FCoE frame size, not including VLAN or Ethernet headers | |
227 | * @flags: flags from probe or claim | |
228 | * @login_count: number of unsuccessful rport logins to this port | |
229 | * @enode_mac: E_Node control MAC address | |
230 | * @vn_mac: VN_Node assigned MAC address for data | |
231 | */ | |
232 | struct fcoe_rport { | |
023358b1 | 233 | struct fc_rport_priv rdata; |
e10f8c66 JE |
234 | unsigned long time; |
235 | u16 fcoe_len; | |
236 | u16 flags; | |
237 | u8 login_count; | |
238 | u8 enode_mac[ETH_ALEN]; | |
239 | u8 vn_mac[ETH_ALEN]; | |
240 | }; | |
241 | ||
97c8389d | 242 | /* FIP API functions */ |
8beb90aa | 243 | void fcoe_ctlr_init(struct fcoe_ctlr *, enum fip_mode); |
97c8389d JE |
244 | void fcoe_ctlr_destroy(struct fcoe_ctlr *); |
245 | void fcoe_ctlr_link_up(struct fcoe_ctlr *); | |
246 | int fcoe_ctlr_link_down(struct fcoe_ctlr *); | |
11b56188 | 247 | int fcoe_ctlr_els_send(struct fcoe_ctlr *, struct fc_lport *, struct sk_buff *); |
97c8389d | 248 | void fcoe_ctlr_recv(struct fcoe_ctlr *, struct sk_buff *); |
70b51aab | 249 | int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *, struct fc_lport *, |
386309ce | 250 | struct fc_frame *); |
97c8389d | 251 | |
85b4aa49 | 252 | /* libfcoe funcs */ |
54db804d GS |
253 | u64 fcoe_wwn_from_mac(unsigned char mac[ETH_ALEN], unsigned int scheme, |
254 | unsigned int port); | |
e10f8c66 JE |
255 | int fcoe_libfc_config(struct fc_lport *, struct fcoe_ctlr *, |
256 | const struct libfc_function_template *, int init_fcp); | |
8597ae8b BPG |
257 | u32 fcoe_fc_crc(struct fc_frame *fp); |
258 | int fcoe_start_io(struct sk_buff *skb); | |
d834895c | 259 | int fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type); |
814740d5 BPG |
260 | void __fcoe_get_lesb(struct fc_lport *lport, struct fc_els_lesb *fc_lesb, |
261 | struct net_device *netdev); | |
d834895c BPG |
262 | void fcoe_wwn_to_str(u64 wwn, char *buf, int len); |
263 | int fcoe_validate_vport_create(struct fc_vport *vport); | |
03702689 | 264 | int fcoe_link_speed_update(struct fc_lport *); |
57c2728f YZ |
265 | void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *); |
266 | void fcoe_ctlr_get_lesb(struct fcoe_ctlr_device *ctlr_dev); | |
fdd78027 | 267 | |
519e5135 VD |
268 | /** |
269 | * is_fip_mode() - returns true if FIP mode selected. | |
270 | * @fip: FCoE controller. | |
271 | */ | |
272 | static inline bool is_fip_mode(struct fcoe_ctlr *fip) | |
273 | { | |
274 | return fip->state == FIP_ST_ENABLED; | |
275 | } | |
276 | ||
0ade7d29 YZ |
277 | /* helper for FCoE SW HBA drivers, can include subven and subdev if needed. The |
278 | * modpost would use pci_device_id table to auto-generate formatted module alias | |
279 | * into the corresponding .mod.c file, but there may or may not be a pci device | |
280 | * id table for FCoE drivers so we use the following helper for build the fcoe | |
281 | * driver module alias. | |
282 | */ | |
283 | #define MODULE_ALIAS_FCOE_PCI(ven, dev) \ | |
284 | MODULE_ALIAS("fcoe-pci:" \ | |
285 | "v" __stringify(ven) \ | |
286 | "d" __stringify(dev) "sv*sd*bc*sc*i*") | |
287 | ||
288 | /* the name of the default FCoE transport driver fcoe.ko */ | |
289 | #define FCOE_TRANSPORT_DEFAULT "fcoe" | |
290 | ||
291 | /* struct fcoe_transport - The FCoE transport interface | |
292 | * @name: a vendor specific name for their FCoE transport driver | |
293 | * @attached: whether this transport is already attached | |
294 | * @list: list linkage to all attached transports | |
295 | * @match: handler to allow the transport driver to match up a given netdev | |
6a891b07 RL |
296 | * @alloc: handler to allocate per-instance FCoE structures |
297 | * (no discovery or login) | |
0ade7d29 | 298 | * @create: handler to sysfs entry of create for FCoE instances |
6a891b07 RL |
299 | * @destroy: handler to delete per-instance FCoE structures |
300 | * (frees all memory) | |
0ade7d29 YZ |
301 | * @enable: handler to sysfs entry of enable for FCoE instances |
302 | * @disable: handler to sysfs entry of disable for FCoE instances | |
303 | */ | |
304 | struct fcoe_transport { | |
305 | char name[IFNAMSIZ]; | |
306 | bool attached; | |
307 | struct list_head list; | |
308 | bool (*match) (struct net_device *device); | |
6a891b07 | 309 | int (*alloc) (struct net_device *device); |
1917d42d | 310 | int (*create) (struct net_device *device, enum fip_mode fip_mode); |
0ade7d29 YZ |
311 | int (*destroy) (struct net_device *device); |
312 | int (*enable) (struct net_device *device); | |
313 | int (*disable) (struct net_device *device); | |
314 | }; | |
315 | ||
8597ae8b BPG |
316 | /** |
317 | * struct fcoe_percpu_s - The context for FCoE receive thread(s) | |
4b9bc86d SAS |
318 | * @kthread: The thread context (used by bnx2fc) |
319 | * @work: The work item (used by fcoe) | |
8597ae8b BPG |
320 | * @fcoe_rx_list: The queue of pending packets to process |
321 | * @page: The memory page for calculating frame trailer CRCs | |
322 | * @crc_eof_offset: The offset into the CRC page pointing to available | |
323 | * memory for a new trailer | |
324 | */ | |
325 | struct fcoe_percpu_s { | |
4b9bc86d SAS |
326 | struct task_struct *kthread; |
327 | struct work_struct work; | |
8597ae8b BPG |
328 | struct sk_buff_head fcoe_rx_list; |
329 | struct page *crc_eof_page; | |
330 | int crc_eof_offset; | |
848b8977 | 331 | local_lock_t lock; |
8597ae8b BPG |
332 | }; |
333 | ||
334 | /** | |
335 | * struct fcoe_port - The FCoE private structure | |
336 | * @priv: The associated fcoe interface. The structure is | |
337 | * defined by the low level driver | |
338 | * @lport: The associated local port | |
339 | * @fcoe_pending_queue: The pending Rx queue of skbs | |
340 | * @fcoe_pending_queue_active: Indicates if the pending queue is active | |
341 | * @max_queue_depth: Max queue depth of pending queue | |
342 | * @min_queue_depth: Min queue depth of pending queue | |
343 | * @timer: The queue timer | |
344 | * @destroy_work: Handle for work context | |
345 | * (to prevent RTNL deadlocks) | |
346 | * @data_srt_addr: Source address for data | |
347 | * | |
348 | * An instance of this structure is to be allocated along with the | |
349 | * Scsi_Host and libfc fc_lport structures. | |
350 | */ | |
351 | struct fcoe_port { | |
352 | void *priv; | |
353 | struct fc_lport *lport; | |
354 | struct sk_buff_head fcoe_pending_queue; | |
355 | u8 fcoe_pending_queue_active; | |
356 | u32 max_queue_depth; | |
357 | u32 min_queue_depth; | |
358 | struct timer_list timer; | |
359 | struct work_struct destroy_work; | |
360 | u8 data_src_addr[ETH_ALEN]; | |
8106fb47 | 361 | struct net_device * (*get_netdev)(const struct fc_lport *lport); |
8597ae8b | 362 | }; |
66524ec9 YZ |
363 | |
364 | /** | |
365 | * fcoe_get_netdev() - Return the net device associated with a local port | |
366 | * @lport: The local port to get the net device from | |
367 | */ | |
368 | static inline struct net_device *fcoe_get_netdev(const struct fc_lport *lport) | |
369 | { | |
370 | struct fcoe_port *port = ((struct fcoe_port *)lport_priv(lport)); | |
371 | ||
372 | return (port->get_netdev) ? port->get_netdev(lport) : NULL; | |
373 | } | |
374 | ||
8597ae8b BPG |
375 | void fcoe_clean_pending_queue(struct fc_lport *); |
376 | void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb); | |
13059106 | 377 | void fcoe_queue_timer(struct timer_list *t); |
8597ae8b BPG |
378 | int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen, |
379 | struct fcoe_percpu_s *fps); | |
380 | ||
8d55e507 RL |
381 | /* FCoE Sysfs helpers */ |
382 | void fcoe_fcf_get_selected(struct fcoe_fcf_device *); | |
6a891b07 | 383 | void fcoe_ctlr_set_fip_mode(struct fcoe_ctlr_device *); |
8d55e507 | 384 | |
0ade7d29 YZ |
385 | /** |
386 | * struct netdev_list | |
387 | * A mapping from netdevice to fcoe_transport | |
388 | */ | |
389 | struct fcoe_netdev_mapping { | |
390 | struct list_head list; | |
391 | struct net_device *netdev; | |
392 | struct fcoe_transport *ft; | |
393 | }; | |
394 | ||
395 | /* fcoe transports registration and deregistration */ | |
396 | int fcoe_transport_attach(struct fcoe_transport *ft); | |
397 | int fcoe_transport_detach(struct fcoe_transport *ft); | |
519e5135 | 398 | |
6a891b07 | 399 | /* sysfs store handler for ctrl_control interface */ |
75cff725 GKH |
400 | ssize_t fcoe_ctlr_create_store(const char *buf, size_t count); |
401 | ssize_t fcoe_ctlr_destroy_store(const char *buf, size_t count); | |
6a891b07 | 402 | |
85b4aa49 | 403 | #endif /* _LIBFCOE_H */ |
6a891b07 RL |
404 | |
405 |