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linux
1/*
2 * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
3 * All rights reserved
4 * www.brocade.com
5 *
6 * Linux driver for Brocade Fibre Channel Host Bus Adapter.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License (GPL) Version 2 as
10 * published by the Free Software Foundation
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 */
17
18/**
19 * port_loop.c vport private loop implementation.
20 */
21#include <bfa.h>
22#include <bfa_svc.h>
23#include "fcs_lport.h"
24#include "fcs_rport.h"
25#include "fcs_trcmod.h"
26#include "lport_priv.h"
27
28BFA_TRC_FILE(FCS, LOOP);
29
30/**
31 * ALPA to LIXA bitmap mapping
32 *
33 * ALPA 0x00 (Word 0, Bit 30) is invalid for N_Ports. Also Word 0 Bit 31
34 * is for L_bit (login required) and is filled as ALPA 0x00 here.
35 */
36static const u8 port_loop_alpa_map[] = {
37 0xEF, 0xE8, 0xE4, 0xE2, 0xE1, 0xE0, 0xDC, 0xDA, /* Word 3 Bits 0..7 */
38 0xD9, 0xD6, 0xD5, 0xD4, 0xD3, 0xD2, 0xD1, 0xCE, /* Word 3 Bits 8..15 */
39 0xCD, 0xCC, 0xCB, 0xCA, 0xC9, 0xC7, 0xC6, 0xC5, /* Word 3 Bits 16..23 */
40 0xC3, 0xBC, 0xBA, 0xB9, 0xB6, 0xB5, 0xB4, 0xB3, /* Word 3 Bits 24..31 */
41
42 0xB2, 0xB1, 0xAE, 0xAD, 0xAC, 0xAB, 0xAA, 0xA9, /* Word 2 Bits 0..7 */
43 0xA7, 0xA6, 0xA5, 0xA3, 0x9F, 0x9E, 0x9D, 0x9B, /* Word 2 Bits 8..15 */
44 0x98, 0x97, 0x90, 0x8F, 0x88, 0x84, 0x82, 0x81, /* Word 2 Bits 16..23 */
45 0x80, 0x7C, 0x7A, 0x79, 0x76, 0x75, 0x74, 0x73, /* Word 2 Bits 24..31 */
46
47 0x72, 0x71, 0x6E, 0x6D, 0x6C, 0x6B, 0x6A, 0x69, /* Word 1 Bits 0..7 */
48 0x67, 0x66, 0x65, 0x63, 0x5C, 0x5A, 0x59, 0x56, /* Word 1 Bits 8..15 */
49 0x55, 0x54, 0x53, 0x52, 0x51, 0x4E, 0x4D, 0x4C, /* Word 1 Bits 16..23 */
50 0x4B, 0x4A, 0x49, 0x47, 0x46, 0x45, 0x43, 0x3C, /* Word 1 Bits 24..31 */
51
52 0x3A, 0x39, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31, /* Word 0 Bits 0..7 */
53 0x2E, 0x2D, 0x2C, 0x2B, 0x2A, 0x29, 0x27, 0x26, /* Word 0 Bits 8..15 */
54 0x25, 0x23, 0x1F, 0x1E, 0x1D, 0x1B, 0x18, 0x17, /* Word 0 Bits 16..23 */
55 0x10, 0x0F, 0x08, 0x04, 0x02, 0x01, 0x00, 0x00, /* Word 0 Bits 24..31 */
56};
57
58/*
59 * Local Functions
60 */
61bfa_status_t bfa_fcs_port_loop_send_plogi(struct bfa_fcs_port_s *port,
62 u8 alpa);
63
64void bfa_fcs_port_loop_plogi_response(void *fcsarg,
65 struct bfa_fcxp_s *fcxp,
66 void *cbarg,
67 bfa_status_t req_status,
68 u32 rsp_len,
69 u32 resid_len,
70 struct fchs_s *rsp_fchs);
71
72bfa_status_t bfa_fcs_port_loop_send_adisc(struct bfa_fcs_port_s *port,
73 u8 alpa);
74
75void bfa_fcs_port_loop_adisc_response(void *fcsarg,
76 struct bfa_fcxp_s *fcxp,
77 void *cbarg,
78 bfa_status_t req_status,
79 u32 rsp_len,
80 u32 resid_len,
81 struct fchs_s *rsp_fchs);
82
83bfa_status_t bfa_fcs_port_loop_send_plogi_acc(struct bfa_fcs_port_s *port,
84 u8 alpa);
85
86void bfa_fcs_port_loop_plogi_acc_response(void *fcsarg,
87 struct bfa_fcxp_s *fcxp,
88 void *cbarg,
89 bfa_status_t req_status,
90 u32 rsp_len,
91 u32 resid_len,
92 struct fchs_s *rsp_fchs);
93
94bfa_status_t bfa_fcs_port_loop_send_adisc_acc(struct bfa_fcs_port_s *port,
95 u8 alpa);
96
97void bfa_fcs_port_loop_adisc_acc_response(void *fcsarg,
98 struct bfa_fcxp_s *fcxp,
99 void *cbarg,
100 bfa_status_t req_status,
101 u32 rsp_len,
102 u32 resid_len,
103 struct fchs_s *rsp_fchs);
104/**
105 * Called by port to initializar in provate LOOP topology.
106 */
107void
108bfa_fcs_port_loop_init(struct bfa_fcs_port_s *port)
109{
110}
111
112/**
113 * Called by port to notify transition to online state.
114 */
115void
116bfa_fcs_port_loop_online(struct bfa_fcs_port_s *port)
117{
118
119 u8 num_alpa = port->port_topo.ploop.num_alpa;
120 u8 *alpa_pos_map = port->port_topo.ploop.alpa_pos_map;
121 struct bfa_fcs_rport_s *r_port;
122 int ii = 0;
123
124 /*
125 * If the port role is Initiator Mode, create Rports.
126 */
127 if (port->port_cfg.roles == BFA_PORT_ROLE_FCP_IM) {
128 /*
129 * Check if the ALPA positional bitmap is available.
130 * if not, we send PLOGI to all possible ALPAs.
131 */
132 if (num_alpa > 0) {
133 for (ii = 0; ii < num_alpa; ii++) {
134 /*
135 * ignore ALPA of bfa port
136 */
137 if (alpa_pos_map[ii] != port->pid) {
138 r_port = bfa_fcs_rport_create(port,
139 alpa_pos_map[ii]);
140 }
141 }
142 } else {
143 for (ii = 0; ii < MAX_ALPA_COUNT; ii++) {
144 /*
145 * ignore ALPA of bfa port
146 */
147 if ((port_loop_alpa_map[ii] > 0)
148 && (port_loop_alpa_map[ii] != port->pid))
149 bfa_fcs_port_loop_send_plogi(port,
150 port_loop_alpa_map[ii]);
151 /**TBD */
152 }
153 }
154 } else {
155 /*
156 * TBD Target Mode ??
157 */
158 }
159
160}
161
162/**
163 * Called by port to notify transition to offline state.
164 */
165void
166bfa_fcs_port_loop_offline(struct bfa_fcs_port_s *port)
167{
168
169}
170
171/**
172 * Called by port to notify a LIP on the loop.
173 */
174void
175bfa_fcs_port_loop_lip(struct bfa_fcs_port_s *port)
176{
177}
178
179/**
180 * Local Functions.
181 */
182bfa_status_t
183bfa_fcs_port_loop_send_plogi(struct bfa_fcs_port_s *port, u8 alpa)
184{
185 struct fchs_s fchs;
186 struct bfa_fcxp_s *fcxp = NULL;
187 int len;
188
189 bfa_trc(port->fcs, alpa);
190
191 fcxp = bfa_fcxp_alloc(NULL, port->fcs->bfa, 0, 0, NULL, NULL, NULL,
192 NULL);
193 bfa_assert(fcxp);
194
195 len = fc_plogi_build(&fchs, bfa_fcxp_get_reqbuf(fcxp), alpa,
196 bfa_fcs_port_get_fcid(port), 0,
197 port->port_cfg.pwwn, port->port_cfg.nwwn,
198 bfa_pport_get_maxfrsize(port->fcs->bfa));
199
200 bfa_fcxp_send(fcxp, NULL, port->fabric->vf_id, port->lp_tag, BFA_FALSE,
201 FC_CLASS_3, len, &fchs,
202 bfa_fcs_port_loop_plogi_response, (void *)port,
203 FC_MAX_PDUSZ, FC_RA_TOV);
204
205 return BFA_STATUS_OK;
206}
207
208/**
209 * Called by fcxp to notify the Plogi response
210 */
211void
212bfa_fcs_port_loop_plogi_response(void *fcsarg, struct bfa_fcxp_s *fcxp,
213 void *cbarg, bfa_status_t req_status,
214 u32 rsp_len, u32 resid_len,
215 struct fchs_s *rsp_fchs)
216{
217 struct bfa_fcs_port_s *port = (struct bfa_fcs_port_s *) cbarg;
218 struct fc_logi_s *plogi_resp;
219 struct fc_els_cmd_s *els_cmd;
220
221 bfa_trc(port->fcs, req_status);
222
223 /*
224 * Sanity Checks
225 */
226 if (req_status != BFA_STATUS_OK) {
227 bfa_trc(port->fcs, req_status);
228 /*
229 * @todo
230 * This could mean that the device with this APLA does not
231 * exist on the loop.
232 */
233
234 return;
235 }
236
237 els_cmd = (struct fc_els_cmd_s *) BFA_FCXP_RSP_PLD(fcxp);
238 plogi_resp = (struct fc_logi_s *) els_cmd;
239
240 if (els_cmd->els_code == FC_ELS_ACC) {
241 bfa_fcs_rport_start(port, rsp_fchs, plogi_resp);
242 } else {
243 bfa_trc(port->fcs, plogi_resp->els_cmd.els_code);
244 bfa_assert(0);
245 }
246}
247
248bfa_status_t
249bfa_fcs_port_loop_send_plogi_acc(struct bfa_fcs_port_s *port, u8 alpa)
250{
251 struct fchs_s fchs;
252 struct bfa_fcxp_s *fcxp;
253 int len;
254
255 bfa_trc(port->fcs, alpa);
256
257 fcxp = bfa_fcxp_alloc(NULL, port->fcs->bfa, 0, 0, NULL, NULL, NULL,
258 NULL);
259 bfa_assert(fcxp);
260
261 len = fc_plogi_acc_build(&fchs, bfa_fcxp_get_reqbuf(fcxp), alpa,
262 bfa_fcs_port_get_fcid(port), 0,
263 port->port_cfg.pwwn, port->port_cfg.nwwn,
264 bfa_pport_get_maxfrsize(port->fcs->bfa));
265
266 bfa_fcxp_send(fcxp, NULL, port->fabric->vf_id, port->lp_tag, BFA_FALSE,
267 FC_CLASS_3, len, &fchs,
268 bfa_fcs_port_loop_plogi_acc_response,
269 (void *)port, FC_MAX_PDUSZ, 0); /* No response
270 * expected
271 */
272
273 return BFA_STATUS_OK;
274}
275
276/*
277 * Plogi Acc Response
278 * We donot do any processing here.
279 */
280void
281bfa_fcs_port_loop_plogi_acc_response(void *fcsarg, struct bfa_fcxp_s *fcxp,
282 void *cbarg, bfa_status_t req_status,
283 u32 rsp_len, u32 resid_len,
284 struct fchs_s *rsp_fchs)
285{
286
287 struct bfa_fcs_port_s *port = (struct bfa_fcs_port_s *) cbarg;
288
289 bfa_trc(port->fcs, port->pid);
290
291 /*
292 * Sanity Checks
293 */
294 if (req_status != BFA_STATUS_OK) {
295 bfa_trc(port->fcs, req_status);
296 return;
297 }
298}
299
300bfa_status_t
301bfa_fcs_port_loop_send_adisc(struct bfa_fcs_port_s *port, u8 alpa)
302{
303 struct fchs_s fchs;
304 struct bfa_fcxp_s *fcxp;
305 int len;
306
307 bfa_trc(port->fcs, alpa);
308
309 fcxp = bfa_fcxp_alloc(NULL, port->fcs->bfa, 0, 0, NULL, NULL, NULL,
310 NULL);
311 bfa_assert(fcxp);
312
313 len = fc_adisc_build(&fchs, bfa_fcxp_get_reqbuf(fcxp), alpa,
314 bfa_fcs_port_get_fcid(port), 0,
315 port->port_cfg.pwwn, port->port_cfg.nwwn);
316
317 bfa_fcxp_send(fcxp, NULL, port->fabric->vf_id, port->lp_tag, BFA_FALSE,
318 FC_CLASS_3, len, &fchs,
319 bfa_fcs_port_loop_adisc_response, (void *)port,
320 FC_MAX_PDUSZ, FC_RA_TOV);
321
322 return BFA_STATUS_OK;
323}
324
325/**
326 * Called by fcxp to notify the ADISC response
327 */
328void
329bfa_fcs_port_loop_adisc_response(void *fcsarg, struct bfa_fcxp_s *fcxp,
330 void *cbarg, bfa_status_t req_status,
331 u32 rsp_len, u32 resid_len,
332 struct fchs_s *rsp_fchs)
333{
334 struct bfa_fcs_port_s *port = (struct bfa_fcs_port_s *) cbarg;
335 struct bfa_fcs_rport_s *rport;
336 struct fc_adisc_s *adisc_resp;
337 struct fc_els_cmd_s *els_cmd;
338 u32 pid = rsp_fchs->s_id;
339
340 bfa_trc(port->fcs, req_status);
341
342 /*
343 * Sanity Checks
344 */
345 if (req_status != BFA_STATUS_OK) {
346 /*
347 * TBD : we may need to retry certain requests
348 */
349 bfa_fcxp_free(fcxp);
350 return;
351 }
352
353 els_cmd = (struct fc_els_cmd_s *) BFA_FCXP_RSP_PLD(fcxp);
354 adisc_resp = (struct fc_adisc_s *) els_cmd;
355
356 if (els_cmd->els_code == FC_ELS_ACC) {
357 } else {
358 bfa_trc(port->fcs, adisc_resp->els_cmd.els_code);
359
360 /*
361 * TBD: we may need to check for reject codes and retry
362 */
363 rport = bfa_fcs_port_get_rport_by_pid(port, pid);
364 if (rport) {
365 list_del(&rport->qe);
366 bfa_fcs_rport_delete(rport);
367 }
368
369 }
370 return;
371}
372
373bfa_status_t
374bfa_fcs_port_loop_send_adisc_acc(struct bfa_fcs_port_s *port, u8 alpa)
375{
376 struct fchs_s fchs;
377 struct bfa_fcxp_s *fcxp;
378 int len;
379
380 bfa_trc(port->fcs, alpa);
381
382 fcxp = bfa_fcxp_alloc(NULL, port->fcs->bfa, 0, 0, NULL, NULL, NULL,
383 NULL);
384 bfa_assert(fcxp);
385
386 len = fc_adisc_acc_build(&fchs, bfa_fcxp_get_reqbuf(fcxp), alpa,
387 bfa_fcs_port_get_fcid(port), 0,
388 port->port_cfg.pwwn, port->port_cfg.nwwn);
389
390 bfa_fcxp_send(fcxp, NULL, port->fabric->vf_id, port->lp_tag, BFA_FALSE,
391 FC_CLASS_3, len, &fchs,
392 bfa_fcs_port_loop_adisc_acc_response,
393 (void *)port, FC_MAX_PDUSZ, 0); /* no reponse
394 * expected
395 */
396
397 return BFA_STATUS_OK;
398}
399
400/*
401 * Adisc Acc Response
402 * We donot do any processing here.
403 */
404void
405bfa_fcs_port_loop_adisc_acc_response(void *fcsarg, struct bfa_fcxp_s *fcxp,
406 void *cbarg, bfa_status_t req_status,
407 u32 rsp_len, u32 resid_len,
408 struct fchs_s *rsp_fchs)
409{
410
411 struct bfa_fcs_port_s *port = (struct bfa_fcs_port_s *) cbarg;
412
413 bfa_trc(port->fcs, port->pid);
414
415 /*
416 * Sanity Checks
417 */
418 if (req_status != BFA_STATUS_OK) {
419 bfa_trc(port->fcs, req_status);
420 return;
421 }
422}