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Robert Love42e9a922008-12-09 15:10:17 -08001/*
2 * Copyright(c) 2007 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 _LIBFC_H_
21#define _LIBFC_H_
22
23#include <linux/timer.h>
24#include <linux/if.h>
Robert Love582b45b2009-03-31 15:51:50 -070025#include <linux/percpu.h>
Robert Love42e9a922008-12-09 15:10:17 -080026
27#include <scsi/scsi_transport.h>
28#include <scsi/scsi_transport_fc.h>
Steve Maa51ab392009-11-03 11:47:34 -080029#include <scsi/scsi_bsg_fc.h>
Robert Love42e9a922008-12-09 15:10:17 -080030
31#include <scsi/fc/fc_fcp.h>
32#include <scsi/fc/fc_ns.h>
33#include <scsi/fc/fc_els.h>
34#include <scsi/fc/fc_gs.h>
35
36#include <scsi/fc_frame.h>
37
Joe Eykholt96ad8462011-01-28 16:04:02 -080038#define FC_FC4_PROV_SIZE (FC_TYPE_FCP + 1) /* size of tables */
39
Robert Love42e9a922008-12-09 15:10:17 -080040/*
41 * libfc error codes
42 */
43#define FC_NO_ERR 0 /* no error */
44#define FC_EX_TIMEOUT 1 /* Exchange timeout */
45#define FC_EX_CLOSED 2 /* Exchange closed */
46
Robert Love3a3b42b2009-11-03 11:47:39 -080047/**
48 * enum fc_lport_state - Local port states
49 * @LPORT_ST_DISABLED: Disabled
50 * @LPORT_ST_FLOGI: Fabric login (FLOGI) sent
51 * @LPORT_ST_DNS: Waiting for name server remote port to become ready
52 * @LPORT_ST_RPN_ID: Register port name by ID (RPN_ID) sent
53 * @LPORT_ST_RFT_ID: Register Fibre Channel types by ID (RFT_ID) sent
Joe Eykholtab593b12009-11-03 11:49:27 -080054 * @LPORT_ST_RFF_ID: Register FC-4 Features by ID (RFF_ID) sent
Robert Love3a3b42b2009-11-03 11:47:39 -080055 * @LPORT_ST_SCR: State Change Register (SCR) sent
56 * @LPORT_ST_READY: Ready for use
57 * @LPORT_ST_LOGO: Local port logout (LOGO) sent
58 * @LPORT_ST_RESET: Local port reset
Robert Love42e9a922008-12-09 15:10:17 -080059 */
Robert Love42e9a922008-12-09 15:10:17 -080060enum fc_lport_state {
Joe Eykholtb1d9fd52009-07-29 17:04:22 -070061 LPORT_ST_DISABLED = 0,
Robert Love42e9a922008-12-09 15:10:17 -080062 LPORT_ST_FLOGI,
63 LPORT_ST_DNS,
Chris Leechc9c7bd72009-11-03 11:46:51 -080064 LPORT_ST_RNN_ID,
Chris Leech5baa17c2009-11-03 11:46:56 -080065 LPORT_ST_RSNN_NN,
Chris Leechc9866a52009-11-03 11:47:01 -080066 LPORT_ST_RSPN_ID,
Robert Love42e9a922008-12-09 15:10:17 -080067 LPORT_ST_RFT_ID,
Joe Eykholtab593b12009-11-03 11:49:27 -080068 LPORT_ST_RFF_ID,
Robert Love42e9a922008-12-09 15:10:17 -080069 LPORT_ST_SCR,
70 LPORT_ST_READY,
71 LPORT_ST_LOGO,
72 LPORT_ST_RESET
73};
74
75enum fc_disc_event {
76 DISC_EV_NONE = 0,
77 DISC_EV_SUCCESS,
78 DISC_EV_FAILED
79};
80
Robert Love3a3b42b2009-11-03 11:47:39 -080081/**
82 * enum fc_rport_state - Remote port states
83 * @RPORT_ST_INIT: Initialized
Joe Eykholta7b12a22010-07-20 15:20:08 -070084 * @RPORT_ST_FLOGI: Waiting for FLOGI completion for point-to-multipoint
85 * @RPORT_ST_PLOGI_WAIT: Waiting for peer to login for point-to-multipoint
Robert Love3a3b42b2009-11-03 11:47:39 -080086 * @RPORT_ST_PLOGI: Waiting for PLOGI completion
87 * @RPORT_ST_PRLI: Waiting for PRLI completion
88 * @RPORT_ST_RTV: Waiting for RTV completion
89 * @RPORT_ST_READY: Ready for use
Robert Love3a3b42b2009-11-03 11:47:39 -080090 * @RPORT_ST_ADISC: Discover Address sent
91 * @RPORT_ST_DELETE: Remote port being deleted
Robert Love3a3b42b2009-11-03 11:47:39 -080092*/
Robert Love42e9a922008-12-09 15:10:17 -080093enum fc_rport_state {
Robert Love3a3b42b2009-11-03 11:47:39 -080094 RPORT_ST_INIT,
Joe Eykholta7b12a22010-07-20 15:20:08 -070095 RPORT_ST_FLOGI,
96 RPORT_ST_PLOGI_WAIT,
Robert Love3a3b42b2009-11-03 11:47:39 -080097 RPORT_ST_PLOGI,
98 RPORT_ST_PRLI,
99 RPORT_ST_RTV,
100 RPORT_ST_READY,
Robert Love3a3b42b2009-11-03 11:47:39 -0800101 RPORT_ST_ADISC,
102 RPORT_ST_DELETE,
Robert Love42e9a922008-12-09 15:10:17 -0800103};
104
Robert Love42e9a922008-12-09 15:10:17 -0800105/**
106 * struct fc_disc_port - temporary discovery port to hold rport identifiers
Robert Love9737e6a2009-08-25 14:02:59 -0700107 * @lp: Fibre Channel host port instance
108 * @peers: Node for list management during discovery and RSCN processing
109 * @rport_work: Work struct for starting the rport state machine
110 * @port_id: Port ID of the discovered port
Robert Love42e9a922008-12-09 15:10:17 -0800111 */
112struct fc_disc_port {
Robert Love3a3b42b2009-11-03 11:47:39 -0800113 struct fc_lport *lp;
114 struct list_head peers;
115 struct work_struct rport_work;
116 u32 port_id;
Robert Love42e9a922008-12-09 15:10:17 -0800117};
118
Robert Love3a3b42b2009-11-03 11:47:39 -0800119/**
120 * enum fc_rport_event - Remote port events
121 * @RPORT_EV_NONE: No event
122 * @RPORT_EV_READY: Remote port is ready for use
123 * @RPORT_EV_FAILED: State machine failed, remote port is not ready
124 * @RPORT_EV_STOP: Remote port has been stopped
125 * @RPORT_EV_LOGO: Remote port logout (LOGO) sent
126 */
Robert Love42e9a922008-12-09 15:10:17 -0800127enum fc_rport_event {
128 RPORT_EV_NONE = 0,
Joe Eykholt4c0f62b2009-08-25 14:01:12 -0700129 RPORT_EV_READY,
Robert Love42e9a922008-12-09 15:10:17 -0800130 RPORT_EV_FAILED,
131 RPORT_EV_STOP,
132 RPORT_EV_LOGO
133};
134
Joe Eykholt9fb9d322009-08-25 14:00:50 -0700135struct fc_rport_priv;
136
Robert Love3a3b42b2009-11-03 11:47:39 -0800137/**
138 * struct fc_rport_operations - Operations for a remote port
139 * @event_callback: Function to be called for remote port events
140 */
Robert Love42e9a922008-12-09 15:10:17 -0800141struct fc_rport_operations {
Joe Eykholt9fb9d322009-08-25 14:00:50 -0700142 void (*event_callback)(struct fc_lport *, struct fc_rport_priv *,
Robert Love42e9a922008-12-09 15:10:17 -0800143 enum fc_rport_event);
144};
145
146/**
147 * struct fc_rport_libfc_priv - libfc internal information about a remote port
Robert Love3a3b42b2009-11-03 11:47:39 -0800148 * @local_port: The associated local port
149 * @rp_state: Indicates READY for I/O or DELETE when blocked
150 * @flags: REC and RETRY supported flags
151 * @e_d_tov: Error detect timeout value (in msec)
152 * @r_a_tov: Resource allocation timeout value (in msec)
Joe Eykholt9e9d0452009-08-25 14:01:18 -0700153 */
154struct fc_rport_libfc_priv {
155 struct fc_lport *local_port;
156 enum fc_rport_state rp_state;
157 u16 flags;
158 #define FC_RP_FLAGS_REC_SUPPORTED (1 << 0)
159 #define FC_RP_FLAGS_RETRY (1 << 1)
Joe Eykholt4b2164d2010-06-11 16:44:51 -0700160 #define FC_RP_STARTED (1 << 2)
Bhanu Prakash Gollapudi75a27922011-01-28 16:05:27 -0800161 #define FC_RP_FLAGS_CONF_REQ (1 << 3)
Joe Eykholt9e9d0452009-08-25 14:01:18 -0700162 unsigned int e_d_tov;
163 unsigned int r_a_tov;
164};
165
166/**
Robert Love3a3b42b2009-11-03 11:47:39 -0800167 * struct fc_rport_priv - libfc remote port and discovery info
168 * @local_port: The associated local port
169 * @rport: The FC transport remote port
170 * @kref: Reference counter
171 * @rp_state: Enumeration that tracks progress of PLOGI, PRLI,
172 * and RTV exchanges
173 * @ids: The remote port identifiers and roles
Joe Eykholt4b2164d2010-06-11 16:44:51 -0700174 * @flags: STARTED, REC and RETRY_SUPPORTED flags
Robert Love3a3b42b2009-11-03 11:47:39 -0800175 * @max_seq: Maximum number of concurrent sequences
176 * @disc_id: The discovery identifier
177 * @maxframe_size: The maximum frame size
178 * @retries: The retry count for the current state
Joe Eykholtf0342602010-06-11 16:44:57 -0700179 * @major_retries: The retry count for the entire PLOGI/PRLI state machine
Robert Love3a3b42b2009-11-03 11:47:39 -0800180 * @e_d_tov: Error detect timeout value (in msec)
181 * @r_a_tov: Resource allocation timeout value (in msec)
182 * @rp_mutex: The mutex that protects the remote port
183 * @retry_work: Handle for retries
184 * @event_callback: Callback when READY, FAILED or LOGO states complete
Joe Eykholt96ad8462011-01-28 16:04:02 -0800185 * @prli_count: Count of open PRLI sessions in providers
Joe Eykholt42e90412010-07-20 15:19:37 -0700186 * @rcu: Structure used for freeing in an RCU-safe manner
Robert Love42e9a922008-12-09 15:10:17 -0800187 */
Joe Eykholt9e9d0452009-08-25 14:01:18 -0700188struct fc_rport_priv {
Robert Love3a3b42b2009-11-03 11:47:39 -0800189 struct fc_lport *local_port;
190 struct fc_rport *rport;
191 struct kref kref;
192 enum fc_rport_state rp_state;
Joe Eykholtf211fa52009-08-25 14:01:01 -0700193 struct fc_rport_identifiers ids;
Robert Love3a3b42b2009-11-03 11:47:39 -0800194 u16 flags;
195 u16 max_seq;
196 u16 disc_id;
197 u16 maxframe_size;
198 unsigned int retries;
Joe Eykholtf0342602010-06-11 16:44:57 -0700199 unsigned int major_retries;
Robert Love3a3b42b2009-11-03 11:47:39 -0800200 unsigned int e_d_tov;
201 unsigned int r_a_tov;
202 struct mutex rp_mutex;
203 struct delayed_work retry_work;
204 enum fc_rport_event event;
205 struct fc_rport_operations *ops;
206 struct list_head peers;
207 struct work_struct event_work;
208 u32 supported_classes;
Joe Eykholt96ad8462011-01-28 16:04:02 -0800209 u16 prli_count;
Joe Eykholt42e90412010-07-20 15:19:37 -0700210 struct rcu_head rcu;
Bhanu Prakash Gollapudi75a27922011-01-28 16:05:27 -0800211 u16 sp_features;
212 u8 spp_type;
213 void (*lld_event_callback)(struct fc_lport *,
214 struct fc_rport_priv *,
215 enum fc_rport_event);
Robert Love42e9a922008-12-09 15:10:17 -0800216};
217
Robert Love3a3b42b2009-11-03 11:47:39 -0800218/**
219 * struct fcoe_dev_stats - fcoe stats structure
220 * @SecondsSinceLastReset: Seconds since the last reset
221 * @TxFrames: Number of transmitted frames
222 * @TxWords: Number of transmitted words
223 * @RxFrames: Number of received frames
224 * @RxWords: Number of received words
225 * @ErrorFrames: Number of received error frames
226 * @DumpedFrames: Number of dumped frames
227 * @LinkFailureCount: Number of link failures
228 * @LossOfSignalCount: Number for signal losses
229 * @InvalidTxWordCount: Number of invalid transmitted words
230 * @InvalidCRCCount: Number of invalid CRCs
231 * @InputRequests: Number of input requests
232 * @OutputRequests: Number of output requests
233 * @ControlRequests: Number of control requests
Joe Eykholt5f0e3852010-11-30 16:20:18 -0800234 * @InputBytes: Number of received bytes
235 * @OutputBytes: Number of transmitted bytes
Yi Zou6580bbd2009-11-20 14:54:52 -0800236 * @VLinkFailureCount: Number of virtual link failures
237 * @MissDiscAdvCount: Number of missing FIP discovery advertisement
Robert Love42e9a922008-12-09 15:10:17 -0800238 */
239struct fcoe_dev_stats {
240 u64 SecondsSinceLastReset;
241 u64 TxFrames;
242 u64 TxWords;
243 u64 RxFrames;
244 u64 RxWords;
245 u64 ErrorFrames;
246 u64 DumpedFrames;
247 u64 LinkFailureCount;
248 u64 LossOfSignalCount;
249 u64 InvalidTxWordCount;
250 u64 InvalidCRCCount;
251 u64 InputRequests;
252 u64 OutputRequests;
253 u64 ControlRequests;
Joe Eykholt5f0e3852010-11-30 16:20:18 -0800254 u64 InputBytes;
255 u64 OutputBytes;
Yi Zou6580bbd2009-11-20 14:54:52 -0800256 u64 VLinkFailureCount;
257 u64 MissDiscAdvCount;
Robert Love42e9a922008-12-09 15:10:17 -0800258};
259
Robert Love3a3b42b2009-11-03 11:47:39 -0800260/**
261 * struct fc_seq_els_data - ELS data used for passing ELS specific responses
Robert Love3a3b42b2009-11-03 11:47:39 -0800262 * @reason: The reason for rejection
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300263 * @explan: The explanation of the rejection
Robert Love3a3b42b2009-11-03 11:47:39 -0800264 *
265 * Mainly used by the exchange manager layer.
Robert Love42e9a922008-12-09 15:10:17 -0800266 */
267struct fc_seq_els_data {
Robert Love42e9a922008-12-09 15:10:17 -0800268 enum fc_els_rjt_reason reason;
269 enum fc_els_rjt_explan explan;
270};
271
Robert Love3a3b42b2009-11-03 11:47:39 -0800272/**
273 * struct fc_fcp_pkt - FCP request structure (one for each scsi_cmnd request)
274 * @lp: The associated local port
275 * @state: The state of the I/O
Robert Love3a3b42b2009-11-03 11:47:39 -0800276 * @ref_cnt: Reference count
277 * @scsi_pkt_lock: Lock to protect the SCSI packet (must be taken before the
278 * host_lock if both are to be held at the same time)
279 * @cmd: The SCSI command (set and clear with the host_lock held)
280 * @list: Tracks queued commands (accessed with the host_lock held)
281 * @timer: The command timer
282 * @tm_done: Completion indicator
283 * @wait_for_comp: Indicator to wait for completion of the I/O (in jiffies)
Robert Love3a3b42b2009-11-03 11:47:39 -0800284 * @data_len: The length of the data
285 * @cdb_cmd: The CDB command
286 * @xfer_len: The transfer length
287 * @xfer_ddp: Indicates if this transfer used DDP (XID of the exchange
288 * will be set here if DDP was setup)
289 * @xfer_contig_end: The offset into the buffer if the buffer is contiguous
290 * (Tx and Rx)
291 * @max_payload: The maximum payload size (in bytes)
292 * @io_status: SCSI result (upper 24 bits)
293 * @cdb_status: CDB status
294 * @status_code: FCP I/O status
295 * @scsi_comp_flags: Completion flags (bit 3 Underrun bit 2: overrun)
296 * @req_flags: Request flags (bit 0: read bit:1 write)
297 * @scsi_resid: SCSI residule length
298 * @rport: The remote port that the SCSI command is targeted at
299 * @seq_ptr: The sequence that will carry the SCSI command
300 * @recov_retry: Number of recovery retries
301 * @recov_seq: The sequence for REC or SRR
Robert Love42e9a922008-12-09 15:10:17 -0800302 */
303struct fc_fcp_pkt {
Robert Love3a3b42b2009-11-03 11:47:39 -0800304 spinlock_t scsi_pkt_lock;
Vasu Deved26cfe2011-09-27 21:37:57 -0700305 atomic_t ref_cnt;
306
307 /* SCSI command and data transfer information */
308 u32 data_len;
Robert Love3a3b42b2009-11-03 11:47:39 -0800309
310 /* SCSI I/O related information */
311 struct scsi_cmnd *cmd;
312 struct list_head list;
313
Vasu Deved26cfe2011-09-27 21:37:57 -0700314 /* Housekeeping information */
315 struct fc_lport *lp;
316 u8 state;
Robert Love42e9a922008-12-09 15:10:17 -0800317
Robert Love3a3b42b2009-11-03 11:47:39 -0800318 /* SCSI/FCP return status */
Robert Love3a3b42b2009-11-03 11:47:39 -0800319 u8 cdb_status;
320 u8 status_code;
321 u8 scsi_comp_flags;
Vasu Deved26cfe2011-09-27 21:37:57 -0700322 u32 io_status;
Robert Love3a3b42b2009-11-03 11:47:39 -0800323 u32 req_flags;
324 u32 scsi_resid;
325
Vasu Deved26cfe2011-09-27 21:37:57 -0700326 /* Transport related veriables */
327 size_t xfer_len;
328 struct fcp_cmnd cdb_cmd;
329 u32 xfer_contig_end;
330 u16 max_payload;
331 u16 xfer_ddp;
332
Robert Love3a3b42b2009-11-03 11:47:39 -0800333 /* Associated structures */
334 struct fc_rport *rport;
335 struct fc_seq *seq_ptr;
336
Vasu Deved26cfe2011-09-27 21:37:57 -0700337 /* Timeout/error related information */
338 struct timer_list timer;
339 int wait_for_comp;
340 u32 recov_retry;
Robert Love3a3b42b2009-11-03 11:47:39 -0800341 struct fc_seq *recov_seq;
Vasu Deved26cfe2011-09-27 21:37:57 -0700342 struct completion tm_done;
343} ____cacheline_aligned_in_smp;
Robert Love42e9a922008-12-09 15:10:17 -0800344
345/*
346 * Structure and function definitions for managing Fibre Channel Exchanges
347 * and Sequences
348 *
349 * fc_exch holds state for one exchange and links to its active sequence.
350 *
351 * fc_seq holds the state for an individual sequence.
352 */
353
354struct fc_exch_mgr;
Vasu Dev96316092009-07-29 17:05:00 -0700355struct fc_exch_mgr_anchor;
Robert Love3a3b42b2009-11-03 11:47:39 -0800356extern u16 fc_cpu_mask; /* cpu mask for possible cpus */
Robert Love42e9a922008-12-09 15:10:17 -0800357
Robert Love3a3b42b2009-11-03 11:47:39 -0800358/**
359 * struct fc_seq - FC sequence
360 * @id: The sequence ID
361 * @ssb_stat: Status flags for the sequence status block (SSB)
362 * @cnt: Number of frames sent so far
363 * @rec_data: FC-4 value for REC
Robert Love42e9a922008-12-09 15:10:17 -0800364 */
365struct fc_seq {
Robert Love3a3b42b2009-11-03 11:47:39 -0800366 u8 id;
367 u16 ssb_stat;
368 u16 cnt;
369 u32 rec_data;
Robert Love42e9a922008-12-09 15:10:17 -0800370};
371
372#define FC_EX_DONE (1 << 0) /* ep is completed */
373#define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */
374
Robert Love3a3b42b2009-11-03 11:47:39 -0800375/**
376 * struct fc_exch - Fibre Channel Exchange
377 * @em: Exchange manager
378 * @pool: Exchange pool
379 * @state: The exchange's state
380 * @xid: The exchange ID
381 * @ex_list: Handle used by the EM to track free exchanges
382 * @ex_lock: Lock that protects the exchange
383 * @ex_refcnt: Reference count
384 * @timeout_work: Handle for timeout handler
385 * @lp: The local port that this exchange is on
386 * @oxid: Originator's exchange ID
387 * @rxid: Responder's exchange ID
388 * @oid: Originator's FCID
389 * @sid: Source FCID
390 * @did: Destination FCID
391 * @esb_stat: ESB exchange status
392 * @r_a_tov: Resouce allocation time out value (in msecs)
393 * @seq_id: The next sequence ID to use
Joe Eykholtf60e12e2010-07-20 15:20:14 -0700394 * @encaps: encapsulation information for lower-level driver
Robert Love3a3b42b2009-11-03 11:47:39 -0800395 * @f_ctl: F_CTL flags for the sequence
396 * @fh_type: The frame type
397 * @class: The class of service
398 * @seq: The sequence in use on this exchange
399 * @resp: Callback for responses on this exchange
400 * @destructor: Called when destroying the exchange
401 * @arg: Passed as a void pointer to the resp() callback
Robert Love42e9a922008-12-09 15:10:17 -0800402 *
403 * Locking notes: The ex_lock protects following items:
404 * state, esb_stat, f_ctl, seq.ssb_stat
405 * seq_id
406 * sequence allocation
407 */
408struct fc_exch {
Robert Love3a3b42b2009-11-03 11:47:39 -0800409 spinlock_t ex_lock;
410 atomic_t ex_refcnt;
Vasu Dev49a19882011-09-27 21:38:02 -0700411 enum fc_class class;
412 struct fc_exch_mgr *em;
413 struct fc_exch_pool *pool;
414 struct list_head ex_list;
Robert Love3a3b42b2009-11-03 11:47:39 -0800415 struct fc_lport *lp;
Vasu Dev49a19882011-09-27 21:38:02 -0700416 u32 esb_stat;
417 u8 state;
418 u8 fh_type;
419 u8 seq_id;
420 u8 encaps;
421 u16 xid;
Robert Love3a3b42b2009-11-03 11:47:39 -0800422 u16 oxid;
423 u16 rxid;
424 u32 oid;
425 u32 sid;
426 u32 did;
Robert Love3a3b42b2009-11-03 11:47:39 -0800427 u32 r_a_tov;
Robert Love3a3b42b2009-11-03 11:47:39 -0800428 u32 f_ctl;
Vasu Dev49a19882011-09-27 21:38:02 -0700429 struct fc_seq seq;
Robert Love3a3b42b2009-11-03 11:47:39 -0800430 void (*resp)(struct fc_seq *, struct fc_frame *, void *);
431 void *arg;
Robert Love3a3b42b2009-11-03 11:47:39 -0800432 void (*destructor)(struct fc_seq *, void *);
Vasu Dev49a19882011-09-27 21:38:02 -0700433 struct delayed_work timeout_work;
434} ____cacheline_aligned_in_smp;
Robert Love42e9a922008-12-09 15:10:17 -0800435#define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq)
436
Robert Love42e9a922008-12-09 15:10:17 -0800437
Robert Love3a3b42b2009-11-03 11:47:39 -0800438struct libfc_function_template {
Robert Love42e9a922008-12-09 15:10:17 -0800439 /*
440 * Interface to send a FC frame
Robert Love0ae4d4a2009-02-27 10:55:39 -0800441 *
442 * STATUS: REQUIRED
Robert Love42e9a922008-12-09 15:10:17 -0800443 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800444 int (*frame_send)(struct fc_lport *, struct fc_frame *);
Robert Love42e9a922008-12-09 15:10:17 -0800445
Robert Love42e9a922008-12-09 15:10:17 -0800446 /*
Robert Love0ae4d4a2009-02-27 10:55:39 -0800447 * Interface to send ELS/CT frames
448 *
449 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800450 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800451 struct fc_seq *(*elsct_send)(struct fc_lport *, u32 did,
452 struct fc_frame *, unsigned int op,
Robert Love42e9a922008-12-09 15:10:17 -0800453 void (*resp)(struct fc_seq *,
Robert Love3a3b42b2009-11-03 11:47:39 -0800454 struct fc_frame *, void *arg),
Robert Love42e9a922008-12-09 15:10:17 -0800455 void *arg, u32 timer_msec);
Robert Love42e9a922008-12-09 15:10:17 -0800456
457 /*
458 * Send the FC frame payload using a new exchange and sequence.
459 *
Robert Love42e9a922008-12-09 15:10:17 -0800460 * The exchange response handler is set in this routine to resp()
461 * function pointer. It can be called in two scenarios: if a timeout
462 * occurs or if a response frame is received for the exchange. The
463 * fc_frame pointer in response handler will also indicate timeout
464 * as error using IS_ERR related macros.
465 *
466 * The exchange destructor handler is also set in this routine.
467 * The destructor handler is invoked by EM layer when exchange
468 * is about to free, this can be used by caller to free its
469 * resources along with exchange free.
470 *
471 * The arg is passed back to resp and destructor handler.
472 *
473 * The timeout value (in msec) for an exchange is set if non zero
474 * timer_msec argument is specified. The timer is canceled when
475 * it fires or when the exchange is done. The exchange timeout handler
476 * is registered by EM layer.
Robert Love0ae4d4a2009-02-27 10:55:39 -0800477 *
478 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800479 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800480 struct fc_seq *(*exch_seq_send)(struct fc_lport *, struct fc_frame *,
481 void (*resp)(struct fc_seq *,
482 struct fc_frame *,
483 void *),
484 void (*destructor)(struct fc_seq *,
485 void *),
486 void *, unsigned int timer_msec);
Robert Love42e9a922008-12-09 15:10:17 -0800487
488 /*
Yi Zoub277d2a2009-02-27 14:07:21 -0800489 * Sets up the DDP context for a given exchange id on the given
490 * scatterlist if LLD supports DDP for large receive.
491 *
492 * STATUS: OPTIONAL
493 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800494 int (*ddp_setup)(struct fc_lport *, u16, struct scatterlist *,
495 unsigned int);
Yi Zoub277d2a2009-02-27 14:07:21 -0800496 /*
497 * Completes the DDP transfer and returns the length of data DDPed
498 * for the given exchange id.
499 *
500 * STATUS: OPTIONAL
501 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800502 int (*ddp_done)(struct fc_lport *, u16);
Yi Zoub277d2a2009-02-27 14:07:21 -0800503 /*
Yi Zou33dc3622011-06-20 16:59:05 -0700504 * Sets up the DDP context for a given exchange id on the given
505 * scatterlist if LLD supports DDP for FCoE target.
506 *
507 * STATUS: OPTIONAL
508 */
509 int (*ddp_target)(struct fc_lport *, u16, struct scatterlist *,
510 unsigned int);
511 /*
Yi Zoub84056b2009-11-20 14:55:19 -0800512 * Allow LLD to fill its own Link Error Status Block
513 *
514 * STATUS: OPTIONAL
515 */
516 void (*get_lesb)(struct fc_lport *, struct fc_els_lesb *lesb);
517 /*
Robert Love0ae4d4a2009-02-27 10:55:39 -0800518 * Send a frame using an existing sequence and exchange.
519 *
520 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800521 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800522 int (*seq_send)(struct fc_lport *, struct fc_seq *,
523 struct fc_frame *);
Robert Love42e9a922008-12-09 15:10:17 -0800524
525 /*
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300526 * Send an ELS response using information from the received frame.
Robert Love0ae4d4a2009-02-27 10:55:39 -0800527 *
528 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800529 */
Joe Eykholt922611562010-07-20 15:21:12 -0700530 void (*seq_els_rsp_send)(struct fc_frame *, enum fc_els_cmd,
Robert Love3a3b42b2009-11-03 11:47:39 -0800531 struct fc_seq_els_data *);
Robert Love42e9a922008-12-09 15:10:17 -0800532
533 /*
534 * Abort an exchange and sequence. Generally called because of a
535 * exchange timeout or an abort from the upper layer.
536 *
537 * A timer_msec can be specified for abort timeout, if non-zero
538 * timer_msec value is specified then exchange resp handler
539 * will be called with timeout error if no response to abort.
Robert Love0ae4d4a2009-02-27 10:55:39 -0800540 *
541 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800542 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800543 int (*seq_exch_abort)(const struct fc_seq *,
Robert Love42e9a922008-12-09 15:10:17 -0800544 unsigned int timer_msec);
545
546 /*
547 * Indicate that an exchange/sequence tuple is complete and the memory
548 * allocated for the related objects may be freed.
Robert Love0ae4d4a2009-02-27 10:55:39 -0800549 *
550 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800551 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800552 void (*exch_done)(struct fc_seq *);
Robert Love42e9a922008-12-09 15:10:17 -0800553
554 /*
Robert Love42e9a922008-12-09 15:10:17 -0800555 * Start a new sequence on the same exchange/sequence tuple.
Robert Love0ae4d4a2009-02-27 10:55:39 -0800556 *
557 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800558 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800559 struct fc_seq *(*seq_start_next)(struct fc_seq *);
Robert Love42e9a922008-12-09 15:10:17 -0800560
561 /*
Joe Eykholt1a5c2d72011-01-28 16:04:08 -0800562 * Set a response handler for the exchange of the sequence.
563 *
564 * STATUS: OPTIONAL
565 */
566 void (*seq_set_resp)(struct fc_seq *sp,
567 void (*resp)(struct fc_seq *, struct fc_frame *,
568 void *),
569 void *arg);
570
571 /*
Joe Eykholt239e8102010-07-20 15:21:07 -0700572 * Assign a sequence for an incoming request frame.
573 *
574 * STATUS: OPTIONAL
575 */
576 struct fc_seq *(*seq_assign)(struct fc_lport *, struct fc_frame *);
577
578 /*
Joe Eykholt62bdb642011-01-28 16:04:34 -0800579 * Release the reference on the sequence returned by seq_assign().
580 *
581 * STATUS: OPTIONAL
582 */
583 void (*seq_release)(struct fc_seq *);
584
585 /*
Robert Love42e9a922008-12-09 15:10:17 -0800586 * Reset an exchange manager, completing all sequences and exchanges.
587 * If s_id is non-zero, reset only exchanges originating from that FID.
588 * If d_id is non-zero, reset only exchanges sending to that FID.
Robert Love0ae4d4a2009-02-27 10:55:39 -0800589 *
590 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800591 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800592 void (*exch_mgr_reset)(struct fc_lport *, u32 s_id, u32 d_id);
Robert Love42e9a922008-12-09 15:10:17 -0800593
Robert Love0ae4d4a2009-02-27 10:55:39 -0800594 /*
595 * Flush the rport work queue. Generally used before shutdown.
596 *
597 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800598 */
Robert Love0ae4d4a2009-02-27 10:55:39 -0800599 void (*rport_flush_queue)(void);
Robert Love42e9a922008-12-09 15:10:17 -0800600
601 /*
Robert Love0ae4d4a2009-02-27 10:55:39 -0800602 * Receive a frame for a local port.
603 *
604 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800605 */
Joe Eykholt922611562010-07-20 15:21:12 -0700606 void (*lport_recv)(struct fc_lport *, struct fc_frame *);
Robert Love42e9a922008-12-09 15:10:17 -0800607
Robert Love0ae4d4a2009-02-27 10:55:39 -0800608 /*
609 * Reset the local port.
610 *
611 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800612 */
Robert Love0ae4d4a2009-02-27 10:55:39 -0800613 int (*lport_reset)(struct fc_lport *);
Robert Love42e9a922008-12-09 15:10:17 -0800614
615 /*
Joe Eykholt093bb6a2009-11-03 11:49:05 -0800616 * Set the local port FC_ID.
617 *
618 * This may be provided by the LLD to allow it to be
619 * notified when the local port is assigned a FC-ID.
620 *
621 * The frame, if non-NULL, is the incoming frame with the
622 * FLOGI LS_ACC or FLOGI, and may contain the granted MAC
623 * address for the LLD. The frame pointer may be NULL if
624 * no MAC is associated with this assignment (LOGO or PLOGI).
625 *
626 * If FC_ID is non-zero, r_a_tov and e_d_tov must be valid.
627 *
628 * Note: this is called with the local port mutex held.
629 *
630 * STATUS: OPTIONAL
631 */
632 void (*lport_set_port_id)(struct fc_lport *, u32 port_id,
633 struct fc_frame *);
634
635 /*
Robert Love9737e6a2009-08-25 14:02:59 -0700636 * Create a remote port with a given port ID
637 *
638 * STATUS: OPTIONAL
Robert Love5101ff92009-02-27 10:55:18 -0800639 */
Robert Love9737e6a2009-08-25 14:02:59 -0700640 struct fc_rport_priv *(*rport_create)(struct fc_lport *, u32);
Robert Love5101ff92009-02-27 10:55:18 -0800641
642 /*
Robert Love42e9a922008-12-09 15:10:17 -0800643 * Initiates the RP state machine. It is called from the LP module.
644 * This function will issue the following commands to the N_Port
645 * identified by the FC ID provided.
646 *
647 * - PLOGI
648 * - PRLI
649 * - RTV
Robert Love0ae4d4a2009-02-27 10:55:39 -0800650 *
651 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800652 */
Joe Eykholt9fb9d322009-08-25 14:00:50 -0700653 int (*rport_login)(struct fc_rport_priv *);
Robert Love42e9a922008-12-09 15:10:17 -0800654
655 /*
656 * Logoff, and remove the rport from the transport if
657 * it had been added. This will send a LOGO to the target.
Robert Love0ae4d4a2009-02-27 10:55:39 -0800658 *
659 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800660 */
Joe Eykholt9fb9d322009-08-25 14:00:50 -0700661 int (*rport_logoff)(struct fc_rport_priv *);
Robert Love42e9a922008-12-09 15:10:17 -0800662
663 /*
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300664 * Receive a request from a remote port.
Robert Love0ae4d4a2009-02-27 10:55:39 -0800665 *
666 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800667 */
Joe Eykholt922611562010-07-20 15:21:12 -0700668 void (*rport_recv_req)(struct fc_lport *, struct fc_frame *);
Robert Love42e9a922008-12-09 15:10:17 -0800669
Robert Love0ae4d4a2009-02-27 10:55:39 -0800670 /*
671 * lookup an rport by it's port ID.
672 *
673 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800674 */
Joe Eykholt9fb9d322009-08-25 14:00:50 -0700675 struct fc_rport_priv *(*rport_lookup)(const struct fc_lport *, u32);
Robert Love42e9a922008-12-09 15:10:17 -0800676
677 /*
Joe Eykholtf211fa52009-08-25 14:01:01 -0700678 * Destroy an rport after final kref_put().
679 * The argument is a pointer to the kref inside the fc_rport_priv.
680 */
681 void (*rport_destroy)(struct kref *);
682
683 /*
Bhanu Prakash Gollapudi75a27922011-01-28 16:05:27 -0800684 * Callback routine after the remote port is logged in
685 *
686 * STATUS: OPTIONAL
687 */
688 void (*rport_event_callback)(struct fc_lport *,
689 struct fc_rport_priv *,
690 enum fc_rport_event);
691
692 /*
Robert Love42e9a922008-12-09 15:10:17 -0800693 * Send a fcp cmd from fsp pkt.
694 * Called with the SCSI host lock unlocked and irqs disabled.
695 *
696 * The resp handler is called when FCP_RSP received.
697 *
Robert Love0ae4d4a2009-02-27 10:55:39 -0800698 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800699 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800700 int (*fcp_cmd_send)(struct fc_lport *, struct fc_fcp_pkt *,
701 void (*resp)(struct fc_seq *, struct fc_frame *,
702 void *));
Robert Love42e9a922008-12-09 15:10:17 -0800703
704 /*
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300705 * Cleanup the FCP layer, used during link down and reset
Robert Love0ae4d4a2009-02-27 10:55:39 -0800706 *
707 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800708 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800709 void (*fcp_cleanup)(struct fc_lport *);
Robert Love42e9a922008-12-09 15:10:17 -0800710
711 /*
712 * Abort all I/O on a local port
Robert Love0ae4d4a2009-02-27 10:55:39 -0800713 *
714 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800715 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800716 void (*fcp_abort_io)(struct fc_lport *);
Robert Love42e9a922008-12-09 15:10:17 -0800717
Robert Love0ae4d4a2009-02-27 10:55:39 -0800718 /*
719 * Receive a request for the discovery layer.
720 *
721 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800722 */
Joe Eykholt922611562010-07-20 15:21:12 -0700723 void (*disc_recv_req)(struct fc_lport *, struct fc_frame *);
Robert Love42e9a922008-12-09 15:10:17 -0800724
725 /*
726 * Start discovery for a local port.
Robert Love0ae4d4a2009-02-27 10:55:39 -0800727 *
728 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800729 */
730 void (*disc_start)(void (*disc_callback)(struct fc_lport *,
731 enum fc_disc_event),
732 struct fc_lport *);
733
734 /*
735 * Stop discovery for a given lport. This will remove
736 * all discovered rports
Robert Love0ae4d4a2009-02-27 10:55:39 -0800737 *
738 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800739 */
740 void (*disc_stop) (struct fc_lport *);
741
742 /*
743 * Stop discovery for a given lport. This will block
744 * until all discovered rports are deleted from the
745 * FC transport class
Robert Love0ae4d4a2009-02-27 10:55:39 -0800746 *
747 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800748 */
749 void (*disc_stop_final) (struct fc_lport *);
750};
751
Robert Love3a3b42b2009-11-03 11:47:39 -0800752/**
753 * struct fc_disc - Discovery context
754 * @retry_count: Number of retries
755 * @pending: 1 if discovery is pending, 0 if not
Bhanu Prakash Gollapudic531b9b2010-10-08 17:12:36 -0700756 * @requested: 1 if discovery has been requested, 0 if not
Robert Love3a3b42b2009-11-03 11:47:39 -0800757 * @seq_count: Number of sequences used for discovery
758 * @buf_len: Length of the discovery buffer
759 * @disc_id: Discovery ID
760 * @rports: List of discovered remote ports
Joe Eykholt06852302010-07-20 15:19:53 -0700761 * @priv: Private pointer for use by discovery code
Robert Love3a3b42b2009-11-03 11:47:39 -0800762 * @disc_mutex: Mutex that protects the discovery context
763 * @partial_buf: Partial name buffer (if names are returned
764 * in multiple frames)
765 * @disc_work: handle for delayed work context
766 * @disc_callback: Callback routine called when discovery completes
767 */
Robert Love42e9a922008-12-09 15:10:17 -0800768struct fc_disc {
Robert Love3a3b42b2009-11-03 11:47:39 -0800769 unsigned char retry_count;
770 unsigned char pending;
771 unsigned char requested;
772 unsigned short seq_count;
773 unsigned char buf_len;
774 u16 disc_id;
775
776 struct list_head rports;
Joe Eykholt06852302010-07-20 15:19:53 -0700777 void *priv;
Robert Love3a3b42b2009-11-03 11:47:39 -0800778 struct mutex disc_mutex;
779 struct fc_gpn_ft_resp partial_buf;
780 struct delayed_work disc_work;
Robert Love42e9a922008-12-09 15:10:17 -0800781
782 void (*disc_callback)(struct fc_lport *,
783 enum fc_disc_event);
Robert Love42e9a922008-12-09 15:10:17 -0800784};
785
Joe Eykholt70d53b02011-01-28 16:04:18 -0800786/*
787 * Local port notifier and events.
788 */
789extern struct blocking_notifier_head fc_lport_notifier_head;
790enum fc_lport_event {
791 FC_LPORT_EV_ADD,
792 FC_LPORT_EV_DEL,
793};
794
Robert Love3a3b42b2009-11-03 11:47:39 -0800795/**
796 * struct fc_lport - Local port
797 * @host: The SCSI host associated with a local port
798 * @ema_list: Exchange manager anchor list
799 * @dns_rdata: The directory server remote port
800 * @ptp_rdata: Point to point remote port
801 * @scsi_priv: FCP layer internal data
802 * @disc: Discovery context
803 * @vports: Child vports if N_Port
804 * @vport: Parent vport if VN_Port
805 * @tt: Libfc function template
806 * @link_up: Link state (1 = link up, 0 = link down)
807 * @qfull: Queue state (1 queue is full, 0 queue is not full)
808 * @state: Identifies the state
809 * @boot_time: Timestamp indicating when the local port came online
810 * @host_stats: SCSI host statistics
811 * @dev_stats: FCoE device stats (TODO: libfc should not be
812 * FCoE aware)
813 * @retry_count: Number of retries in the current state
Robert Love7b2787e2010-05-07 15:18:41 -0700814 * @port_id: FC Port ID
Robert Love3a3b42b2009-11-03 11:47:39 -0800815 * @wwpn: World Wide Port Name
816 * @wwnn: World Wide Node Name
817 * @service_params: Common service parameters
818 * @e_d_tov: Error detection timeout value
819 * @r_a_tov: Resouce allocation timeout value
820 * @rnid_gen: RNID information
821 * @sg_supp: Indicates if scatter gather is supported
822 * @seq_offload: Indicates if sequence offload is supported
823 * @crc_offload: Indicates if CRC offload is supported
824 * @lro_enabled: Indicates if large receive offload is supported
825 * @does_npiv: Supports multiple vports
826 * @npiv_enabled: Switch/fabric allows NPIV
827 * @mfs: The maximum Fibre Channel payload size
828 * @max_retry_count: The maximum retry attempts
829 * @max_rport_retry_count: The maximum remote port retry attempts
Joe Eykholtf90377a2010-07-20 15:19:42 -0700830 * @rport_priv_size: Size needed by driver after struct fc_rport_priv
Robert Love3a3b42b2009-11-03 11:47:39 -0800831 * @lro_xid: The maximum XID for LRO
832 * @lso_max: The maximum large offload send size
833 * @fcts: FC-4 type mask
834 * @lp_mutex: Mutex to protect the local port
Joe Eykholt70d53b02011-01-28 16:04:18 -0800835 * @list: Linkage on list of vport peers
Robert Love3a3b42b2009-11-03 11:47:39 -0800836 * @retry_work: Handle to local port for delayed retry context
Joe Eykholtbaf9fdf2011-01-28 16:04:13 -0800837 * @prov: Pointers available for use by passive FC-4 providers
Joe Eykholt70d53b02011-01-28 16:04:18 -0800838 * @lport_list: Linkage on module-wide list of local ports
Robert Love3a3b42b2009-11-03 11:47:39 -0800839 */
Robert Love42e9a922008-12-09 15:10:17 -0800840struct fc_lport {
Robert Love42e9a922008-12-09 15:10:17 -0800841 /* Associations */
Robert Love3a3b42b2009-11-03 11:47:39 -0800842 struct Scsi_Host *host;
843 struct list_head ema_list;
844 struct fc_rport_priv *dns_rdata;
845 struct fc_rport_priv *ptp_rdata;
846 void *scsi_priv;
847 struct fc_disc disc;
848
849 /* Virtual port information */
850 struct list_head vports;
851 struct fc_vport *vport;
Robert Love42e9a922008-12-09 15:10:17 -0800852
853 /* Operational Information */
854 struct libfc_function_template tt;
Robert Love3a3b42b2009-11-03 11:47:39 -0800855 u8 link_up;
856 u8 qfull;
857 enum fc_lport_state state;
858 unsigned long boot_time;
859 struct fc_host_statistics host_stats;
Bart Van Asschec6b21c92012-01-13 17:26:20 -0800860 struct fcoe_dev_stats __percpu *dev_stats;
Robert Love3a3b42b2009-11-03 11:47:39 -0800861 u8 retry_count;
Robert Love42e9a922008-12-09 15:10:17 -0800862
Robert Love3a3b42b2009-11-03 11:47:39 -0800863 /* Fabric information */
Robert Love7b2787e2010-05-07 15:18:41 -0700864 u32 port_id;
Robert Love3a3b42b2009-11-03 11:47:39 -0800865 u64 wwpn;
866 u64 wwnn;
867 unsigned int service_params;
868 unsigned int e_d_tov;
869 unsigned int r_a_tov;
870 struct fc_els_rnid_gen rnid_gen;
Robert Love42e9a922008-12-09 15:10:17 -0800871
872 /* Capabilities */
Robert Love3a3b42b2009-11-03 11:47:39 -0800873 u32 sg_supp:1;
874 u32 seq_offload:1;
875 u32 crc_offload:1;
876 u32 lro_enabled:1;
877 u32 does_npiv:1;
878 u32 npiv_enabled:1;
Joe Eykholt3726f352010-07-20 15:20:03 -0700879 u32 point_to_multipoint:1;
Robert Love3a3b42b2009-11-03 11:47:39 -0800880 u32 mfs;
881 u8 max_retry_count;
882 u8 max_rport_retry_count;
Joe Eykholtf90377a2010-07-20 15:19:42 -0700883 u16 rport_priv_size;
Robert Love3a3b42b2009-11-03 11:47:39 -0800884 u16 link_speed;
885 u16 link_supported_speeds;
886 u16 lro_xid;
887 unsigned int lso_max;
888 struct fc_ns_fts fcts;
Robert Love42e9a922008-12-09 15:10:17 -0800889
890 /* Miscellaneous */
Robert Love3a3b42b2009-11-03 11:47:39 -0800891 struct mutex lp_mutex;
892 struct list_head list;
893 struct delayed_work retry_work;
Joe Eykholtbaf9fdf2011-01-28 16:04:13 -0800894 void *prov[FC_FC4_PROV_SIZE];
Joe Eykholt70d53b02011-01-28 16:04:18 -0800895 struct list_head lport_list;
Robert Love42e9a922008-12-09 15:10:17 -0800896};
897
Joe Eykholt96ad8462011-01-28 16:04:02 -0800898/**
899 * struct fc4_prov - FC-4 provider registration
900 * @prli: Handler for incoming PRLI
901 * @prlo: Handler for session reset
902 * @recv: Handler for incoming request
903 * @module: Pointer to module. May be NULL.
904 */
905struct fc4_prov {
906 int (*prli)(struct fc_rport_priv *, u32 spp_len,
907 const struct fc_els_spp *spp_in,
908 struct fc_els_spp *spp_out);
909 void (*prlo)(struct fc_rport_priv *);
910 void (*recv)(struct fc_lport *, struct fc_frame *);
911 struct module *module;
912};
913
914/*
915 * Register FC-4 provider with libfc.
916 */
917int fc_fc4_register_provider(enum fc_fh_type type, struct fc4_prov *);
918void fc_fc4_deregister_provider(enum fc_fh_type type, struct fc4_prov *);
919
Robert Love34f42a02009-02-27 10:55:45 -0800920/*
Robert Love42e9a922008-12-09 15:10:17 -0800921 * FC_LPORT HELPER FUNCTIONS
922 *****************************/
Robert Love3a3b42b2009-11-03 11:47:39 -0800923
924/**
925 * fc_lport_test_ready() - Determine if a local port is in the READY state
926 * @lport: The local port to test
927 */
928static inline int fc_lport_test_ready(struct fc_lport *lport)
Robert Love42e9a922008-12-09 15:10:17 -0800929{
Robert Love3a3b42b2009-11-03 11:47:39 -0800930 return lport->state == LPORT_ST_READY;
Robert Love42e9a922008-12-09 15:10:17 -0800931}
932
Robert Love3a3b42b2009-11-03 11:47:39 -0800933/**
934 * fc_set_wwnn() - Set the World Wide Node Name of a local port
935 * @lport: The local port whose WWNN is to be set
936 * @wwnn: The new WWNN
937 */
938static inline void fc_set_wwnn(struct fc_lport *lport, u64 wwnn)
Robert Love42e9a922008-12-09 15:10:17 -0800939{
Robert Love3a3b42b2009-11-03 11:47:39 -0800940 lport->wwnn = wwnn;
Robert Love42e9a922008-12-09 15:10:17 -0800941}
942
Robert Love3a3b42b2009-11-03 11:47:39 -0800943/**
944 * fc_set_wwpn() - Set the World Wide Port Name of a local port
945 * @lport: The local port whose WWPN is to be set
946 * @wwnn: The new WWPN
947 */
948static inline void fc_set_wwpn(struct fc_lport *lport, u64 wwnn)
Robert Love42e9a922008-12-09 15:10:17 -0800949{
Robert Love3a3b42b2009-11-03 11:47:39 -0800950 lport->wwpn = wwnn;
Robert Love42e9a922008-12-09 15:10:17 -0800951}
952
Robert Love3a3b42b2009-11-03 11:47:39 -0800953/**
954 * fc_lport_state_enter() - Change a local port's state
955 * @lport: The local port whose state is to change
956 * @state: The new state
957 */
958static inline void fc_lport_state_enter(struct fc_lport *lport,
Robert Love42e9a922008-12-09 15:10:17 -0800959 enum fc_lport_state state)
960{
Robert Love3a3b42b2009-11-03 11:47:39 -0800961 if (state != lport->state)
962 lport->retry_count = 0;
963 lport->state = state;
Robert Love42e9a922008-12-09 15:10:17 -0800964}
965
Robert Love3a3b42b2009-11-03 11:47:39 -0800966/**
967 * fc_lport_init_stats() - Allocate per-CPU statistics for a local port
968 * @lport: The local port whose statistics are to be initialized
969 */
970static inline int fc_lport_init_stats(struct fc_lport *lport)
Robert Love582b45b2009-03-31 15:51:50 -0700971{
Robert Love3a3b42b2009-11-03 11:47:39 -0800972 lport->dev_stats = alloc_percpu(struct fcoe_dev_stats);
973 if (!lport->dev_stats)
Robert Love582b45b2009-03-31 15:51:50 -0700974 return -ENOMEM;
975 return 0;
976}
977
Robert Love3a3b42b2009-11-03 11:47:39 -0800978/**
979 * fc_lport_free_stats() - Free memory for a local port's statistics
980 * @lport: The local port whose statistics are to be freed
981 */
982static inline void fc_lport_free_stats(struct fc_lport *lport)
Robert Love582b45b2009-03-31 15:51:50 -0700983{
Robert Love3a3b42b2009-11-03 11:47:39 -0800984 free_percpu(lport->dev_stats);
Vasu Deva0a25da2009-03-17 11:42:29 -0700985}
986
987/**
Robert Love3a3b42b2009-11-03 11:47:39 -0800988 * lport_priv() - Return the private data from a local port
989 * @lport: The local port whose private data is to be retreived
990 */
991static inline void *lport_priv(const struct fc_lport *lport)
992{
993 return (void *)(lport + 1);
994}
995
996/**
997 * libfc_host_alloc() - Allocate a Scsi_Host with room for a local port and
998 * LLD private data
999 * @sht: The SCSI host template
1000 * @priv_size: Size of private data
Vasu Deva0a25da2009-03-17 11:42:29 -07001001 *
Chris Leech86221962009-11-03 11:46:08 -08001002 * Returns: libfc lport
Vasu Deva0a25da2009-03-17 11:42:29 -07001003 */
Chris Leech86221962009-11-03 11:46:08 -08001004static inline struct fc_lport *
Vasu Deva0a25da2009-03-17 11:42:29 -07001005libfc_host_alloc(struct scsi_host_template *sht, int priv_size)
1006{
Chris Leech86221962009-11-03 11:46:08 -08001007 struct fc_lport *lport;
1008 struct Scsi_Host *shost;
1009
1010 shost = scsi_host_alloc(sht, sizeof(*lport) + priv_size);
1011 if (!shost)
1012 return NULL;
1013 lport = shost_priv(shost);
1014 lport->host = shost;
1015 INIT_LIST_HEAD(&lport->ema_list);
Chris Leech174e1eb2009-11-03 11:46:14 -08001016 INIT_LIST_HEAD(&lport->vports);
Chris Leech86221962009-11-03 11:46:08 -08001017 return lport;
Vasu Deva0a25da2009-03-17 11:42:29 -07001018}
Robert Love42e9a922008-12-09 15:10:17 -08001019
Robert Love34f42a02009-02-27 10:55:45 -08001020/*
Robert Love3a3b42b2009-11-03 11:47:39 -08001021 * FC_FCP HELPER FUNCTIONS
1022 *****************************/
1023static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp)
1024{
1025 if (fsp && fsp->cmd)
1026 return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE;
1027 return false;
1028}
1029
1030/*
Robert Love42e9a922008-12-09 15:10:17 -08001031 * LOCAL PORT LAYER
1032 *****************************/
Robert Love3a3b42b2009-11-03 11:47:39 -08001033int fc_lport_init(struct fc_lport *);
1034int fc_lport_destroy(struct fc_lport *);
1035int fc_fabric_logoff(struct fc_lport *);
1036int fc_fabric_login(struct fc_lport *);
Chris Leech8faecdd2009-11-03 11:46:19 -08001037void __fc_linkup(struct fc_lport *);
Robert Love42e9a922008-12-09 15:10:17 -08001038void fc_linkup(struct fc_lport *);
Chris Leech8faecdd2009-11-03 11:46:19 -08001039void __fc_linkdown(struct fc_lport *);
Robert Love42e9a922008-12-09 15:10:17 -08001040void fc_linkdown(struct fc_lport *);
Robert Love3a3b42b2009-11-03 11:47:39 -08001041void fc_vport_setlink(struct fc_lport *);
1042void fc_vports_linkchange(struct fc_lport *);
Robert Love42e9a922008-12-09 15:10:17 -08001043int fc_lport_config(struct fc_lport *);
Robert Love42e9a922008-12-09 15:10:17 -08001044int fc_lport_reset(struct fc_lport *);
Robert Love3a3b42b2009-11-03 11:47:39 -08001045int fc_set_mfs(struct fc_lport *, u32 mfs);
1046struct fc_lport *libfc_vport_create(struct fc_vport *, int privsize);
1047struct fc_lport *fc_vport_id_lookup(struct fc_lport *, u32 port_id);
1048int fc_lport_bsg_request(struct fc_bsg_job *);
Joe Eykholt3726f352010-07-20 15:20:03 -07001049void fc_lport_set_local_id(struct fc_lport *, u32 port_id);
Joe Eykholt70d53b02011-01-28 16:04:18 -08001050void fc_lport_iterate(void (*func)(struct fc_lport *, void *), void *);
Steve Maa51ab392009-11-03 11:47:34 -08001051
1052/*
Robert Love42e9a922008-12-09 15:10:17 -08001053 * REMOTE PORT LAYER
1054 *****************************/
Robert Love3a3b42b2009-11-03 11:47:39 -08001055int fc_rport_init(struct fc_lport *);
1056void fc_rport_terminate_io(struct fc_rport *);
Robert Love42e9a922008-12-09 15:10:17 -08001057
Robert Love34f42a02009-02-27 10:55:45 -08001058/*
Robert Love42e9a922008-12-09 15:10:17 -08001059 * DISCOVERY LAYER
1060 *****************************/
Robert Love3a3b42b2009-11-03 11:47:39 -08001061int fc_disc_init(struct fc_lport *);
Robert Love42e9a922008-12-09 15:10:17 -08001062
Joe Eykholt06852302010-07-20 15:19:53 -07001063static inline struct fc_lport *fc_disc_lport(struct fc_disc *disc)
1064{
1065 return container_of(disc, struct fc_lport, disc);
1066}
1067
Robert Love34f42a02009-02-27 10:55:45 -08001068/*
Robert Love3a3b42b2009-11-03 11:47:39 -08001069 * FCP LAYER
Robert Love42e9a922008-12-09 15:10:17 -08001070 *****************************/
Robert Love42e9a922008-12-09 15:10:17 -08001071int fc_fcp_init(struct fc_lport *);
Robert Love42e9a922008-12-09 15:10:17 -08001072void fc_fcp_destroy(struct fc_lport *);
1073
Robert Love34f42a02009-02-27 10:55:45 -08001074/*
Robert Love3a3b42b2009-11-03 11:47:39 -08001075 * SCSI INTERACTION LAYER
1076 *****************************/
Jeff Garzikf2812332010-11-16 02:10:29 -05001077int fc_queuecommand(struct Scsi_Host *, struct scsi_cmnd *);
Robert Love3a3b42b2009-11-03 11:47:39 -08001078int fc_eh_abort(struct scsi_cmnd *);
1079int fc_eh_device_reset(struct scsi_cmnd *);
1080int fc_eh_host_reset(struct scsi_cmnd *);
1081int fc_slave_alloc(struct scsi_device *);
1082int fc_change_queue_depth(struct scsi_device *, int qdepth, int reason);
1083int fc_change_queue_type(struct scsi_device *, int tag_type);
1084
1085/*
Robert Love42e9a922008-12-09 15:10:17 -08001086 * ELS/CT interface
1087 *****************************/
Robert Love3a3b42b2009-11-03 11:47:39 -08001088int fc_elsct_init(struct fc_lport *);
1089struct fc_seq *fc_elsct_send(struct fc_lport *, u32 did,
1090 struct fc_frame *,
Chris Leech11b56182009-11-03 11:46:29 -08001091 unsigned int op,
1092 void (*resp)(struct fc_seq *,
Robert Love3a3b42b2009-11-03 11:47:39 -08001093 struct fc_frame *,
Chris Leech11b56182009-11-03 11:46:29 -08001094 void *arg),
1095 void *arg, u32 timer_msec);
1096void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *);
1097void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *);
Joe Eykholt24f089e2010-07-20 15:21:01 -07001098void fc_fill_reply_hdr(struct fc_frame *, const struct fc_frame *,
1099 enum fc_rctl, u32 parm_offset);
1100void fc_fill_hdr(struct fc_frame *, const struct fc_frame *,
1101 enum fc_rctl, u32 f_ctl, u16 seq_cnt, u32 parm_offset);
Robert Love42e9a922008-12-09 15:10:17 -08001102
1103
Robert Love34f42a02009-02-27 10:55:45 -08001104/*
Robert Love42e9a922008-12-09 15:10:17 -08001105 * EXCHANGE MANAGER LAYER
1106 *****************************/
Robert Love3a3b42b2009-11-03 11:47:39 -08001107int fc_exch_init(struct fc_lport *);
1108struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *,
1109 struct fc_exch_mgr *,
Vasu Dev96316092009-07-29 17:05:00 -07001110 bool (*match)(struct fc_frame *));
Robert Love3a3b42b2009-11-03 11:47:39 -08001111void fc_exch_mgr_del(struct fc_exch_mgr_anchor *);
Chris Leech174e1eb2009-11-03 11:46:14 -08001112int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst);
Robert Love3a3b42b2009-11-03 11:47:39 -08001113struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *, enum fc_class class,
1114 u16 min_xid, u16 max_xid,
Vasu Dev52ff8782009-07-29 17:05:10 -07001115 bool (*match)(struct fc_frame *));
Robert Love3a3b42b2009-11-03 11:47:39 -08001116void fc_exch_mgr_free(struct fc_lport *);
1117void fc_exch_recv(struct fc_lport *, struct fc_frame *);
Abhijeet Joglekar1f6ff362009-02-27 10:54:35 -08001118void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id);
Robert Love42e9a922008-12-09 15:10:17 -08001119
1120/*
1121 * Functions for fc_functions_template
1122 */
Robert Love3a3b42b2009-11-03 11:47:39 -08001123void fc_get_host_speed(struct Scsi_Host *);
Robert Love3a3b42b2009-11-03 11:47:39 -08001124void fc_get_host_port_state(struct Scsi_Host *);
1125void fc_set_rport_loss_tmo(struct fc_rport *, u32 timeout);
Robert Love42e9a922008-12-09 15:10:17 -08001126struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *);
1127
Robert Love42e9a922008-12-09 15:10:17 -08001128#endif /* _LIBFC_H_ */