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Merge tag 'tty-5.2-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
[linux-2.6-block.git] / drivers / scsi / csiostor / csio_lnode.c
CommitLineData
a3667aae
NKI		 1/*
2 * This file is part of the Chelsio FCoE driver for Linux.
3 *
4 * Copyright (c) 2008-2012 Chelsio Communications, Inc. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34
35#include <linux/kernel.h>
36#include <linux/delay.h>
37#include <linux/slab.h>
38#include <linux/utsname.h>
39#include <scsi/scsi_device.h>
40#include <scsi/scsi_transport_fc.h>
41#include <asm/unaligned.h>
42#include <scsi/fc/fc_els.h>
43#include <scsi/fc/fc_fs.h>
44#include <scsi/fc/fc_gs.h>
45#include <scsi/fc/fc_ms.h>
46
47#include "csio_hw.h"
48#include "csio_mb.h"
49#include "csio_lnode.h"
50#include "csio_rnode.h"
51
52int csio_fcoe_rnodes = 1024;
53int csio_fdmi_enable = 1;
54
55#define PORT_ID_PTR(_x) ((uint8_t *)(&_x) + 1)
56
57/* Lnode SM declarations */
58static void csio_lns_uninit(struct csio_lnode *, enum csio_ln_ev);
59static void csio_lns_online(struct csio_lnode *, enum csio_ln_ev);
60static void csio_lns_ready(struct csio_lnode *, enum csio_ln_ev);
61static void csio_lns_offline(struct csio_lnode *, enum csio_ln_ev);
62
63static int csio_ln_mgmt_submit_req(struct csio_ioreq *,
64 void (*io_cbfn) (struct csio_hw *, struct csio_ioreq *),
65 enum fcoe_cmn_type, struct csio_dma_buf *, uint32_t);
66
67/* LN event mapping */
68static enum csio_ln_ev fwevt_to_lnevt[] = {
69 CSIO_LNE_NONE, /* None */
70 CSIO_LNE_NONE, /* PLOGI_ACC_RCVD */
71 CSIO_LNE_NONE, /* PLOGI_RJT_RCVD */
72 CSIO_LNE_NONE, /* PLOGI_RCVD */
73 CSIO_LNE_NONE, /* PLOGO_RCVD */
74 CSIO_LNE_NONE, /* PRLI_ACC_RCVD */
75 CSIO_LNE_NONE, /* PRLI_RJT_RCVD */
76 CSIO_LNE_NONE, /* PRLI_RCVD */
77 CSIO_LNE_NONE, /* PRLO_RCVD */
78 CSIO_LNE_NONE, /* NPORT_ID_CHGD */
79 CSIO_LNE_LOGO, /* FLOGO_RCVD */
80 CSIO_LNE_LOGO, /* CLR_VIRT_LNK_RCVD */
81 CSIO_LNE_FAB_INIT_DONE,/* FLOGI_ACC_RCVD */
82 CSIO_LNE_NONE, /* FLOGI_RJT_RCVD */
83 CSIO_LNE_FAB_INIT_DONE,/* FDISC_ACC_RCVD */
84 CSIO_LNE_NONE, /* FDISC_RJT_RCVD */
85 CSIO_LNE_NONE, /* FLOGI_TMO_MAX_RETRY */
86 CSIO_LNE_NONE, /* IMPL_LOGO_ADISC_ACC */
87 CSIO_LNE_NONE, /* IMPL_LOGO_ADISC_RJT */
88 CSIO_LNE_NONE, /* IMPL_LOGO_ADISC_CNFLT */
89 CSIO_LNE_NONE, /* PRLI_TMO */
90 CSIO_LNE_NONE, /* ADISC_TMO */
91 CSIO_LNE_NONE, /* RSCN_DEV_LOST */
92 CSIO_LNE_NONE, /* SCR_ACC_RCVD */
93 CSIO_LNE_NONE, /* ADISC_RJT_RCVD */
94 CSIO_LNE_NONE, /* LOGO_SNT */
95 CSIO_LNE_NONE, /* PROTO_ERR_IMPL_LOGO */
96};
97
98#define CSIO_FWE_TO_LNE(_evt) ((_evt > PROTO_ERR_IMPL_LOGO) ? \
99 CSIO_LNE_NONE : \
100 fwevt_to_lnevt[_evt])
101
102#define csio_ct_rsp(cp) (((struct fc_ct_hdr *)cp)->ct_cmd)
103#define csio_ct_reason(cp) (((struct fc_ct_hdr *)cp)->ct_reason)
104#define csio_ct_expl(cp) (((struct fc_ct_hdr *)cp)->ct_explan)
105#define csio_ct_get_pld(cp) ((void *)(((uint8_t *)cp) + FC_CT_HDR_LEN))
106
107/*
108 * csio_ln_match_by_portid - lookup lnode using given portid.
109 * @hw: HW module
110 * @portid: port-id.
111 *
112 * If found, returns lnode matching given portid otherwise returns NULL.
113 */
114static struct csio_lnode *
115csio_ln_lookup_by_portid(struct csio_hw *hw, uint8_t portid)
116{
52797a1d 117 struct csio_lnode *ln;
a3667aae
NKI		 118 struct list_head *tmp;
119
120 /* Match siblings lnode with portid */
121 list_for_each(tmp, &hw->sln_head) {
122 ln = (struct csio_lnode *) tmp;
123 if (ln->portid == portid)
124 return ln;
125 }
126
127 return NULL;
128}
129
130/*
131 * csio_ln_lookup_by_vnpi - Lookup lnode using given vnp id.
132 * @hw - HW module
133 * @vnpi - vnp index.
134 * Returns - If found, returns lnode matching given vnp id
135 * otherwise returns NULL.
136 */
137static struct csio_lnode *
138csio_ln_lookup_by_vnpi(struct csio_hw *hw, uint32_t vnp_id)
139{
140 struct list_head *tmp1, *tmp2;
141 struct csio_lnode *sln = NULL, *cln = NULL;
142
143 if (list_empty(&hw->sln_head)) {
144 CSIO_INC_STATS(hw, n_lnlkup_miss);
145 return NULL;
146 }
147 /* Traverse sibling lnodes */
148 list_for_each(tmp1, &hw->sln_head) {
149 sln = (struct csio_lnode *) tmp1;
150
151 /* Match sibling lnode */
152 if (sln->vnp_flowid == vnp_id)
153 return sln;
154
155 if (list_empty(&sln->cln_head))
156 continue;
157
158 /* Traverse children lnodes */
159 list_for_each(tmp2, &sln->cln_head) {
160 cln = (struct csio_lnode *) tmp2;
161
162 if (cln->vnp_flowid == vnp_id)
163 return cln;
164 }
165 }
166 CSIO_INC_STATS(hw, n_lnlkup_miss);
167 return NULL;
168}
169
170/**
171 * csio_lnode_lookup_by_wwpn - Lookup lnode using given wwpn.
172 * @hw: HW module.
173 * @wwpn: WWPN.
174 *
175 * If found, returns lnode matching given wwpn, returns NULL otherwise.
176 */
177struct csio_lnode *
178csio_lnode_lookup_by_wwpn(struct csio_hw *hw, uint8_t *wwpn)
179{
180 struct list_head *tmp1, *tmp2;
181 struct csio_lnode *sln = NULL, *cln = NULL;
182
183 if (list_empty(&hw->sln_head)) {
184 CSIO_INC_STATS(hw, n_lnlkup_miss);
185 return NULL;
186 }
187 /* Traverse sibling lnodes */
188 list_for_each(tmp1, &hw->sln_head) {
189 sln = (struct csio_lnode *) tmp1;
190
191 /* Match sibling lnode */
192 if (!memcmp(csio_ln_wwpn(sln), wwpn, 8))
193 return sln;
194
195 if (list_empty(&sln->cln_head))
196 continue;
197
198 /* Traverse children lnodes */
199 list_for_each(tmp2, &sln->cln_head) {
200 cln = (struct csio_lnode *) tmp2;
201
202 if (!memcmp(csio_ln_wwpn(cln), wwpn, 8))
203 return cln;
204 }
205 }
206 return NULL;
207}
208
209/* FDMI */
210static void
211csio_fill_ct_iu(void *buf, uint8_t type, uint8_t sub_type, uint16_t op)
212{
213 struct fc_ct_hdr *cmd = (struct fc_ct_hdr *)buf;
214 cmd->ct_rev = FC_CT_REV;
215 cmd->ct_fs_type = type;
216 cmd->ct_fs_subtype = sub_type;
5036f0a0 217 cmd->ct_cmd = htons(op);
a3667aae
NKI		 218}
219
220static int
221csio_hostname(uint8_t *buf, size_t buf_len)
222{
223 if (snprintf(buf, buf_len, "%s", init_utsname()->nodename) > 0)
224 return 0;
225 return -1;
226}
227
228static int
229csio_osname(uint8_t *buf, size_t buf_len)
230{
231 if (snprintf(buf, buf_len, "%s %s %s",
232 init_utsname()->sysname,
233 init_utsname()->release,
234 init_utsname()->version) > 0)
235 return 0;
236
237 return -1;
238}
239
240static inline void
42c335f7 241csio_append_attrib(uint8_t **ptr, uint16_t type, void *val, size_t val_len)
a3667aae 242{
42c335f7 243 uint16_t len;
a3667aae 244 struct fc_fdmi_attr_entry *ae = (struct fc_fdmi_attr_entry *)*ptr;
42c335f7
KC		 245
246 if (WARN_ON(val_len > U16_MAX))
247 return;
248
249 len = val_len;
250
a3667aae
NKI		 251 ae->type = htons(type);
252 len += 4; /* includes attribute type and length */
253 len = (len + 3) & ~3; /* should be multiple of 4 bytes */
254 ae->len = htons(len);
42c335f7
KC		 255 memcpy(ae->value, val, val_len);
256 if (len > val_len)
257 memset(ae->value + val_len, 0, len - val_len);
a3667aae
NKI		 258 *ptr += len;
259}
260
261/*
262 * csio_ln_fdmi_done - FDMI registeration completion
263 * @hw: HW context
264 * @fdmi_req: fdmi request
265 */
266static void
267csio_ln_fdmi_done(struct csio_hw *hw, struct csio_ioreq *fdmi_req)
268{
269 void *cmd;
270 struct csio_lnode *ln = fdmi_req->lnode;
271
272 if (fdmi_req->wr_status != FW_SUCCESS) {
273 csio_ln_dbg(ln, "WR error:%x in processing fdmi rpa cmd\n",
274 fdmi_req->wr_status);
275 CSIO_INC_STATS(ln, n_fdmi_err);
276 }
277
278 cmd = fdmi_req->dma_buf.vaddr;
279 if (ntohs(csio_ct_rsp(cmd)) != FC_FS_ACC) {
280 csio_ln_dbg(ln, "fdmi rpa cmd rejected reason %x expl %x\n",
281 csio_ct_reason(cmd), csio_ct_expl(cmd));
282 }
283}
284
285/*
286 * csio_ln_fdmi_rhba_cbfn - RHBA completion
287 * @hw: HW context
288 * @fdmi_req: fdmi request
289 */
290static void
291csio_ln_fdmi_rhba_cbfn(struct csio_hw *hw, struct csio_ioreq *fdmi_req)
292{
293 void *cmd;
294 uint8_t *pld;
295 uint32_t len = 0;
5036f0a0
NKI		 296 __be32 val;
297 __be16 mfs;
298 uint32_t numattrs = 0;
a3667aae
NKI		 299 struct csio_lnode *ln = fdmi_req->lnode;
300 struct fs_fdmi_attrs *attrib_blk;
301 struct fc_fdmi_port_name *port_name;
302 uint8_t buf[64];
a3667aae
NKI		 303 uint8_t *fc4_type;
304
305 if (fdmi_req->wr_status != FW_SUCCESS) {
306 csio_ln_dbg(ln, "WR error:%x in processing fdmi rhba cmd\n",
307 fdmi_req->wr_status);
308 CSIO_INC_STATS(ln, n_fdmi_err);
309 }
310
311 cmd = fdmi_req->dma_buf.vaddr;
312 if (ntohs(csio_ct_rsp(cmd)) != FC_FS_ACC) {
313 csio_ln_dbg(ln, "fdmi rhba cmd rejected reason %x expl %x\n",
314 csio_ct_reason(cmd), csio_ct_expl(cmd));
315 }
316
317 if (!csio_is_rnode_ready(fdmi_req->rnode)) {
318 CSIO_INC_STATS(ln, n_fdmi_err);
319 return;
320 }
321
322 /* Prepare CT hdr for RPA cmd */
323 memset(cmd, 0, FC_CT_HDR_LEN);
5036f0a0 324 csio_fill_ct_iu(cmd, FC_FST_MGMT, FC_FDMI_SUBTYPE, FC_FDMI_RPA);
a3667aae
NKI		 325
326 /* Prepare RPA payload */
327 pld = (uint8_t *)csio_ct_get_pld(cmd);
328 port_name = (struct fc_fdmi_port_name *)pld;
329 memcpy(&port_name->portname, csio_ln_wwpn(ln), 8);
330 pld += sizeof(*port_name);
331
332 /* Start appending Port attributes */
333 attrib_blk = (struct fs_fdmi_attrs *)pld;
334 attrib_blk->numattrs = 0;
335 len += sizeof(attrib_blk->numattrs);
336 pld += sizeof(attrib_blk->numattrs);
337
338 fc4_type = &buf[0];
339 memset(fc4_type, 0, FC_FDMI_PORT_ATTR_FC4TYPES_LEN);
340 fc4_type[2] = 1;
341 fc4_type[7] = 1;
342 csio_append_attrib(&pld, FC_FDMI_PORT_ATTR_FC4TYPES,
343 fc4_type, FC_FDMI_PORT_ATTR_FC4TYPES_LEN);
5036f0a0 344 numattrs++;
a3667aae
NKI		 345 val = htonl(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
346 csio_append_attrib(&pld, FC_FDMI_PORT_ATTR_SUPPORTEDSPEED,
42c335f7 347 &val,
a3667aae 348 FC_FDMI_PORT_ATTR_SUPPORTEDSPEED_LEN);
5036f0a0 349 numattrs++;
a3667aae
NKI		 350
351 if (hw->pport[ln->portid].link_speed == FW_PORT_CAP_SPEED_1G)
352 val = htonl(FC_PORTSPEED_1GBIT);
353 else if (hw->pport[ln->portid].link_speed == FW_PORT_CAP_SPEED_10G)
354 val = htonl(FC_PORTSPEED_10GBIT);
e1735d9a
VP		 355 else if (hw->pport[ln->portid].link_speed == FW_PORT_CAP32_SPEED_25G)
356 val = htonl(FC_PORTSPEED_25GBIT);
357 else if (hw->pport[ln->portid].link_speed == FW_PORT_CAP32_SPEED_40G)
358 val = htonl(FC_PORTSPEED_40GBIT);
359 else if (hw->pport[ln->portid].link_speed == FW_PORT_CAP32_SPEED_50G)
360 val = htonl(FC_PORTSPEED_50GBIT);
361 else if (hw->pport[ln->portid].link_speed == FW_PORT_CAP32_SPEED_100G)
362 val = htonl(FC_PORTSPEED_100GBIT);
a3667aae
NKI		 363 else
364 val = htonl(CSIO_HBA_PORTSPEED_UNKNOWN);
365 csio_append_attrib(&pld, FC_FDMI_PORT_ATTR_CURRENTPORTSPEED,
42c335f7 366 &val, FC_FDMI_PORT_ATTR_CURRENTPORTSPEED_LEN);
5036f0a0 367 numattrs++;
a3667aae 368
5036f0a0 369 mfs = ln->ln_sparm.csp.sp_bb_data;
a3667aae 370 csio_append_attrib(&pld, FC_FDMI_PORT_ATTR_MAXFRAMESIZE,
42c335f7 371 &mfs, sizeof(mfs));
5036f0a0 372 numattrs++;
a3667aae
NKI		 373
374 strcpy(buf, "csiostor");
375 csio_append_attrib(&pld, FC_FDMI_PORT_ATTR_OSDEVICENAME, buf,
42c335f7 376 strlen(buf));
5036f0a0 377 numattrs++;
a3667aae
NKI		 378
379 if (!csio_hostname(buf, sizeof(buf))) {
380 csio_append_attrib(&pld, FC_FDMI_PORT_ATTR_HOSTNAME,
42c335f7 381 buf, strlen(buf));
5036f0a0 382 numattrs++;
a3667aae 383 }
5036f0a0 384 attrib_blk->numattrs = htonl(numattrs);
a3667aae
NKI		 385 len = (uint32_t)(pld - (uint8_t *)cmd);
386
387 /* Submit FDMI RPA request */
388 spin_lock_irq(&hw->lock);
389 if (csio_ln_mgmt_submit_req(fdmi_req, csio_ln_fdmi_done,
390 FCOE_CT, &fdmi_req->dma_buf, len)) {
391 CSIO_INC_STATS(ln, n_fdmi_err);
392 csio_ln_dbg(ln, "Failed to issue fdmi rpa req\n");
393 }
394 spin_unlock_irq(&hw->lock);
395}
396
397/*
398 * csio_ln_fdmi_dprt_cbfn - DPRT completion
399 * @hw: HW context
400 * @fdmi_req: fdmi request
401 */
402static void
403csio_ln_fdmi_dprt_cbfn(struct csio_hw *hw, struct csio_ioreq *fdmi_req)
404{
405 void *cmd;
406 uint8_t *pld;
407 uint32_t len = 0;
5036f0a0
NKI		 408 uint32_t numattrs = 0;
409 __be32 maxpayload = htonl(65536);
a3667aae
NKI		 410 struct fc_fdmi_hba_identifier *hbaid;
411 struct csio_lnode *ln = fdmi_req->lnode;
412 struct fc_fdmi_rpl *reg_pl;
413 struct fs_fdmi_attrs *attrib_blk;
414 uint8_t buf[64];
415
416 if (fdmi_req->wr_status != FW_SUCCESS) {
417 csio_ln_dbg(ln, "WR error:%x in processing fdmi dprt cmd\n",
418 fdmi_req->wr_status);
419 CSIO_INC_STATS(ln, n_fdmi_err);
420 }
421
422 if (!csio_is_rnode_ready(fdmi_req->rnode)) {
423 CSIO_INC_STATS(ln, n_fdmi_err);
424 return;
425 }
426 cmd = fdmi_req->dma_buf.vaddr;
427 if (ntohs(csio_ct_rsp(cmd)) != FC_FS_ACC) {
428 csio_ln_dbg(ln, "fdmi dprt cmd rejected reason %x expl %x\n",
429 csio_ct_reason(cmd), csio_ct_expl(cmd));
430 }
431
432 /* Prepare CT hdr for RHBA cmd */
433 memset(cmd, 0, FC_CT_HDR_LEN);
5036f0a0 434 csio_fill_ct_iu(cmd, FC_FST_MGMT, FC_FDMI_SUBTYPE, FC_FDMI_RHBA);
a3667aae
NKI		 435 len = FC_CT_HDR_LEN;
436
437 /* Prepare RHBA payload */
438 pld = (uint8_t *)csio_ct_get_pld(cmd);
439 hbaid = (struct fc_fdmi_hba_identifier *)pld;
440 memcpy(&hbaid->id, csio_ln_wwpn(ln), 8); /* HBA identifer */
441 pld += sizeof(*hbaid);
442
443 /* Register one port per hba */
444 reg_pl = (struct fc_fdmi_rpl *)pld;
5036f0a0 445 reg_pl->numport = htonl(1);
a3667aae
NKI		 446 memcpy(&reg_pl->port[0].portname, csio_ln_wwpn(ln), 8);
447 pld += sizeof(*reg_pl);
448
449 /* Start appending HBA attributes hba */
450 attrib_blk = (struct fs_fdmi_attrs *)pld;
451 attrib_blk->numattrs = 0;
452 len += sizeof(attrib_blk->numattrs);
453 pld += sizeof(attrib_blk->numattrs);
454
455 csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_NODENAME, csio_ln_wwnn(ln),
456 FC_FDMI_HBA_ATTR_NODENAME_LEN);
5036f0a0 457 numattrs++;
a3667aae
NKI		 458
459 memset(buf, 0, sizeof(buf));
460
461 strcpy(buf, "Chelsio Communications");
462 csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_MANUFACTURER, buf,
42c335f7 463 strlen(buf));
5036f0a0 464 numattrs++;
a3667aae 465 csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_SERIALNUMBER,
42c335f7 466 hw->vpd.sn, sizeof(hw->vpd.sn));
5036f0a0 467 numattrs++;
a3667aae 468 csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_MODEL, hw->vpd.id,
42c335f7 469 sizeof(hw->vpd.id));
5036f0a0 470 numattrs++;
a3667aae 471 csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_MODELDESCRIPTION,
42c335f7 472 hw->model_desc, strlen(hw->model_desc));
5036f0a0 473 numattrs++;
a3667aae 474 csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_HARDWAREVERSION,
42c335f7 475 hw->hw_ver, sizeof(hw->hw_ver));
5036f0a0 476 numattrs++;
a3667aae 477 csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_FIRMWAREVERSION,
42c335f7 478 hw->fwrev_str, strlen(hw->fwrev_str));
5036f0a0 479 numattrs++;
a3667aae
NKI		 480
481 if (!csio_osname(buf, sizeof(buf))) {
482 csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_OSNAMEVERSION,
42c335f7 483 buf, strlen(buf));
5036f0a0 484 numattrs++;
a3667aae
NKI		 485 }
486
487 csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_MAXCTPAYLOAD,
42c335f7 488 &maxpayload, FC_FDMI_HBA_ATTR_MAXCTPAYLOAD_LEN);
a3667aae 489 len = (uint32_t)(pld - (uint8_t *)cmd);
5036f0a0
NKI		 490 numattrs++;
491 attrib_blk->numattrs = htonl(numattrs);
a3667aae
NKI		 492
493 /* Submit FDMI RHBA request */
494 spin_lock_irq(&hw->lock);
495 if (csio_ln_mgmt_submit_req(fdmi_req, csio_ln_fdmi_rhba_cbfn,
496 FCOE_CT, &fdmi_req->dma_buf, len)) {
497 CSIO_INC_STATS(ln, n_fdmi_err);
498 csio_ln_dbg(ln, "Failed to issue fdmi rhba req\n");
499 }
500 spin_unlock_irq(&hw->lock);
501}
502
503/*
504 * csio_ln_fdmi_dhba_cbfn - DHBA completion
505 * @hw: HW context
506 * @fdmi_req: fdmi request
507 */
508static void
509csio_ln_fdmi_dhba_cbfn(struct csio_hw *hw, struct csio_ioreq *fdmi_req)
510{
511 struct csio_lnode *ln = fdmi_req->lnode;
512 void *cmd;
513 struct fc_fdmi_port_name *port_name;
514 uint32_t len;
515
516 if (fdmi_req->wr_status != FW_SUCCESS) {
517 csio_ln_dbg(ln, "WR error:%x in processing fdmi dhba cmd\n",
518 fdmi_req->wr_status);
519 CSIO_INC_STATS(ln, n_fdmi_err);
520 }
521
522 if (!csio_is_rnode_ready(fdmi_req->rnode)) {
523 CSIO_INC_STATS(ln, n_fdmi_err);
524 return;
525 }
526 cmd = fdmi_req->dma_buf.vaddr;
527 if (ntohs(csio_ct_rsp(cmd)) != FC_FS_ACC) {
528 csio_ln_dbg(ln, "fdmi dhba cmd rejected reason %x expl %x\n",
529 csio_ct_reason(cmd), csio_ct_expl(cmd));
530 }
531
532 /* Send FDMI cmd to de-register any Port attributes if registered
533 * before
534 */
535
536 /* Prepare FDMI DPRT cmd */
537 memset(cmd, 0, FC_CT_HDR_LEN);
5036f0a0 538 csio_fill_ct_iu(cmd, FC_FST_MGMT, FC_FDMI_SUBTYPE, FC_FDMI_DPRT);
a3667aae
NKI		 539 len = FC_CT_HDR_LEN;
540 port_name = (struct fc_fdmi_port_name *)csio_ct_get_pld(cmd);
541 memcpy(&port_name->portname, csio_ln_wwpn(ln), 8);
542 len += sizeof(*port_name);
543
544 /* Submit FDMI request */
545 spin_lock_irq(&hw->lock);
546 if (csio_ln_mgmt_submit_req(fdmi_req, csio_ln_fdmi_dprt_cbfn,
547 FCOE_CT, &fdmi_req->dma_buf, len)) {
548 CSIO_INC_STATS(ln, n_fdmi_err);
549 csio_ln_dbg(ln, "Failed to issue fdmi dprt req\n");
550 }
551 spin_unlock_irq(&hw->lock);
552}
553
554/**
555 * csio_ln_fdmi_start - Start an FDMI request.
556 * @ln: lnode
557 * @context: session context
558 *
559 * Issued with lock held.
560 */
561int
562csio_ln_fdmi_start(struct csio_lnode *ln, void *context)
563{
564 struct csio_ioreq *fdmi_req;
565 struct csio_rnode *fdmi_rn = (struct csio_rnode *)context;
566 void *cmd;
567 struct fc_fdmi_hba_identifier *hbaid;
568 uint32_t len;
569
570 if (!(ln->flags & CSIO_LNF_FDMI_ENABLE))
571 return -EPROTONOSUPPORT;
572
573 if (!csio_is_rnode_ready(fdmi_rn))
574 CSIO_INC_STATS(ln, n_fdmi_err);
575
576 /* Send FDMI cmd to de-register any HBA attributes if registered
577 * before
578 */
579
580 fdmi_req = ln->mgmt_req;
581 fdmi_req->lnode = ln;
582 fdmi_req->rnode = fdmi_rn;
583
584 /* Prepare FDMI DHBA cmd */
585 cmd = fdmi_req->dma_buf.vaddr;
586 memset(cmd, 0, FC_CT_HDR_LEN);
5036f0a0 587 csio_fill_ct_iu(cmd, FC_FST_MGMT, FC_FDMI_SUBTYPE, FC_FDMI_DHBA);
a3667aae
NKI		 588 len = FC_CT_HDR_LEN;
589
590 hbaid = (struct fc_fdmi_hba_identifier *)csio_ct_get_pld(cmd);
591 memcpy(&hbaid->id, csio_ln_wwpn(ln), 8);
592 len += sizeof(*hbaid);
593
594 /* Submit FDMI request */
595 if (csio_ln_mgmt_submit_req(fdmi_req, csio_ln_fdmi_dhba_cbfn,
596 FCOE_CT, &fdmi_req->dma_buf, len)) {
597 CSIO_INC_STATS(ln, n_fdmi_err);
598 csio_ln_dbg(ln, "Failed to issue fdmi dhba req\n");
599 }
600
601 return 0;
602}
603
604/*
605 * csio_ln_vnp_read_cbfn - vnp read completion handler.
606 * @hw: HW lnode
607 * @cbfn: Completion handler.
608 *
609 * Reads vnp response and updates ln parameters.
610 */
611static void
612csio_ln_vnp_read_cbfn(struct csio_hw *hw, struct csio_mb *mbp)
613{
614 struct csio_lnode *ln = ((struct csio_lnode *)mbp->priv);
615 struct fw_fcoe_vnp_cmd *rsp = (struct fw_fcoe_vnp_cmd *)(mbp->mb);
616 struct fc_els_csp *csp;
617 struct fc_els_cssp *clsp;
618 enum fw_retval retval;
5036f0a0 619 __be32 nport_id;
a3667aae 620
e2ac9628 621 retval = FW_CMD_RETVAL_G(ntohl(rsp->alloc_to_len16));
a3667aae
NKI		 622 if (retval != FW_SUCCESS) {
623 csio_err(hw, "FCOE VNP read cmd returned error:0x%x\n", retval);
624 mempool_free(mbp, hw->mb_mempool);
625 return;
626 }
627
628 spin_lock_irq(&hw->lock);
629
630 memcpy(ln->mac, rsp->vnport_mac, sizeof(ln->mac));
5036f0a0
NKI		 631 memcpy(&nport_id, &rsp->vnport_mac[3], sizeof(uint8_t)*3);
632 ln->nport_id = ntohl(nport_id);
633 ln->nport_id = ln->nport_id >> 8;
a3667aae
NKI		 634
635 /* Update WWNs */
636 /*
637 * This may look like a duplication of what csio_fcoe_enable_link()
638 * does, but is absolutely necessary if the vnpi changes between
639 * a FCOE LINK UP and FCOE LINK DOWN.
640 */
641 memcpy(csio_ln_wwnn(ln), rsp->vnport_wwnn, 8);
642 memcpy(csio_ln_wwpn(ln), rsp->vnport_wwpn, 8);
643
644 /* Copy common sparam */
645 csp = (struct fc_els_csp *)rsp->cmn_srv_parms;
646 ln->ln_sparm.csp.sp_hi_ver = csp->sp_hi_ver;
647 ln->ln_sparm.csp.sp_lo_ver = csp->sp_lo_ver;
5036f0a0
NKI		 648 ln->ln_sparm.csp.sp_bb_cred = csp->sp_bb_cred;
649 ln->ln_sparm.csp.sp_features = csp->sp_features;
650 ln->ln_sparm.csp.sp_bb_data = csp->sp_bb_data;
651 ln->ln_sparm.csp.sp_r_a_tov = csp->sp_r_a_tov;
652 ln->ln_sparm.csp.sp_e_d_tov = csp->sp_e_d_tov;
a3667aae
NKI		 653
654 /* Copy word 0 & word 1 of class sparam */
655 clsp = (struct fc_els_cssp *)rsp->clsp_word_0_1;
5036f0a0
NKI		 656 ln->ln_sparm.clsp[2].cp_class = clsp->cp_class;
657 ln->ln_sparm.clsp[2].cp_init = clsp->cp_init;
658 ln->ln_sparm.clsp[2].cp_recip = clsp->cp_recip;
659 ln->ln_sparm.clsp[2].cp_rdfs = clsp->cp_rdfs;
a3667aae
NKI		 660
661 spin_unlock_irq(&hw->lock);
662
663 mempool_free(mbp, hw->mb_mempool);
664
665 /* Send an event to update local attribs */
666 csio_lnode_async_event(ln, CSIO_LN_FC_ATTRIB_UPDATE);
667}
668
669/*
670 * csio_ln_vnp_read - Read vnp params.
671 * @ln: lnode
672 * @cbfn: Completion handler.
673 *
674 * Issued with lock held.
675 */
676static int
677csio_ln_vnp_read(struct csio_lnode *ln,
678 void (*cbfn) (struct csio_hw *, struct csio_mb *))
679{
680 struct csio_hw *hw = ln->hwp;
681 struct csio_mb *mbp;
682
683 /* Allocate Mbox request */
684 mbp = mempool_alloc(hw->mb_mempool, GFP_ATOMIC);
685 if (!mbp) {
686 CSIO_INC_STATS(hw, n_err_nomem);
687 return -ENOMEM;
688 }
689
690 /* Prepare VNP Command */
691 csio_fcoe_vnp_read_init_mb(ln, mbp,
692 CSIO_MB_DEFAULT_TMO,
693 ln->fcf_flowid,
694 ln->vnp_flowid,
695 cbfn);
696
697 /* Issue MBOX cmd */
698 if (csio_mb_issue(hw, mbp)) {
699 csio_err(hw, "Failed to issue mbox FCoE VNP command\n");
700 mempool_free(mbp, hw->mb_mempool);
701 return -EINVAL;
702 }
703
704 return 0;
705}
706
707/*
708 * csio_fcoe_enable_link - Enable fcoe link.
709 * @ln: lnode
710 * @enable: enable/disable
711 * Issued with lock held.
712 * Issues mbox cmd to bring up FCOE link on port associated with given ln.
713 */
714static int
715csio_fcoe_enable_link(struct csio_lnode *ln, bool enable)
716{
717 struct csio_hw *hw = ln->hwp;
718 struct csio_mb *mbp;
719 enum fw_retval retval;
720 uint8_t portid;
721 uint8_t sub_op;
722 struct fw_fcoe_link_cmd *lcmd;
723 int i;
724
725 mbp = mempool_alloc(hw->mb_mempool, GFP_ATOMIC);
726 if (!mbp) {
727 CSIO_INC_STATS(hw, n_err_nomem);
728 return -ENOMEM;
729 }
730
731 portid = ln->portid;
732 sub_op = enable ? FCOE_LINK_UP : FCOE_LINK_DOWN;
733
734 csio_dbg(hw, "bringing FCOE LINK %s on Port:%d\n",
735 sub_op ? "UP" : "DOWN", portid);
736
737 csio_write_fcoe_link_cond_init_mb(ln, mbp, CSIO_MB_DEFAULT_TMO,
738 portid, sub_op, 0, 0, 0, NULL);
739
740 if (csio_mb_issue(hw, mbp)) {
741 csio_err(hw, "failed to issue FCOE LINK cmd on port[%d]\n",
742 portid);
743 mempool_free(mbp, hw->mb_mempool);
744 return -EINVAL;
745 }
746
747 retval = csio_mb_fw_retval(mbp);
748 if (retval != FW_SUCCESS) {
749 csio_err(hw,
750 "FCOE LINK %s cmd on port[%d] failed with "
751 "ret:x%x\n", sub_op ? "UP" : "DOWN", portid, retval);
752 mempool_free(mbp, hw->mb_mempool);
753 return -EINVAL;
754 }
755
756 if (!enable)
757 goto out;
758
759 lcmd = (struct fw_fcoe_link_cmd *)mbp->mb;
760
761 memcpy(csio_ln_wwnn(ln), lcmd->vnport_wwnn, 8);
762 memcpy(csio_ln_wwpn(ln), lcmd->vnport_wwpn, 8);
763
764 for (i = 0; i < CSIO_MAX_PPORTS; i++)
765 if (hw->pport[i].portid == portid)
766 memcpy(hw->pport[i].mac, lcmd->phy_mac, 6);
767
768out:
769 mempool_free(mbp, hw->mb_mempool);
770 return 0;
771}
772
773/*
774 * csio_ln_read_fcf_cbfn - Read fcf parameters
775 * @ln: lnode
776 *
777 * read fcf response and Update ln fcf information.
778 */
779static void
780csio_ln_read_fcf_cbfn(struct csio_hw *hw, struct csio_mb *mbp)
781{
782 struct csio_lnode *ln = (struct csio_lnode *)mbp->priv;
783 struct csio_fcf_info *fcf_info;
784 struct fw_fcoe_fcf_cmd *rsp =
785 (struct fw_fcoe_fcf_cmd *)(mbp->mb);
786 enum fw_retval retval;
787
e2ac9628 788 retval = FW_CMD_RETVAL_G(ntohl(rsp->retval_len16));
a3667aae
NKI		 789 if (retval != FW_SUCCESS) {
790 csio_ln_err(ln, "FCOE FCF cmd failed with ret x%x\n",
791 retval);
792 mempool_free(mbp, hw->mb_mempool);
793 return;
794 }
795
796 spin_lock_irq(&hw->lock);
797 fcf_info = ln->fcfinfo;
798 fcf_info->priority = FW_FCOE_FCF_CMD_PRIORITY_GET(
799 ntohs(rsp->priority_pkd));
800 fcf_info->vf_id = ntohs(rsp->vf_id);
801 fcf_info->vlan_id = rsp->vlan_id;
802 fcf_info->max_fcoe_size = ntohs(rsp->max_fcoe_size);
803 fcf_info->fka_adv = be32_to_cpu(rsp->fka_adv);
804 fcf_info->fcfi = FW_FCOE_FCF_CMD_FCFI_GET(ntohl(rsp->op_to_fcfi));
805 fcf_info->fpma = FW_FCOE_FCF_CMD_FPMA_GET(rsp->fpma_to_portid);
806 fcf_info->spma = FW_FCOE_FCF_CMD_SPMA_GET(rsp->fpma_to_portid);
807 fcf_info->login = FW_FCOE_FCF_CMD_LOGIN_GET(rsp->fpma_to_portid);
808 fcf_info->portid = FW_FCOE_FCF_CMD_PORTID_GET(rsp->fpma_to_portid);
809 memcpy(fcf_info->fc_map, rsp->fc_map, sizeof(fcf_info->fc_map));
810 memcpy(fcf_info->mac, rsp->mac, sizeof(fcf_info->mac));
811 memcpy(fcf_info->name_id, rsp->name_id, sizeof(fcf_info->name_id));
812 memcpy(fcf_info->fabric, rsp->fabric, sizeof(fcf_info->fabric));
813 memcpy(fcf_info->spma_mac, rsp->spma_mac, sizeof(fcf_info->spma_mac));
814
815 spin_unlock_irq(&hw->lock);
816
817 mempool_free(mbp, hw->mb_mempool);
818}
819
820/*
821 * csio_ln_read_fcf_entry - Read fcf entry.
822 * @ln: lnode
823 * @cbfn: Completion handler.
824 *
825 * Issued with lock held.
826 */
827static int
828csio_ln_read_fcf_entry(struct csio_lnode *ln,
829 void (*cbfn) (struct csio_hw *, struct csio_mb *))
830{
831 struct csio_hw *hw = ln->hwp;
832 struct csio_mb *mbp;
833
834 mbp = mempool_alloc(hw->mb_mempool, GFP_ATOMIC);
835 if (!mbp) {
836 CSIO_INC_STATS(hw, n_err_nomem);
837 return -ENOMEM;
838 }
839
840 /* Get FCoE FCF information */
841 csio_fcoe_read_fcf_init_mb(ln, mbp, CSIO_MB_DEFAULT_TMO,
842 ln->portid, ln->fcf_flowid, cbfn);
843
844 if (csio_mb_issue(hw, mbp)) {
845 csio_err(hw, "failed to issue FCOE FCF cmd\n");
846 mempool_free(mbp, hw->mb_mempool);
847 return -EINVAL;
848 }
849
850 return 0;
851}
852
853/*
854 * csio_handle_link_up - Logical Linkup event.
855 * @hw - HW module.
856 * @portid - Physical port number
857 * @fcfi - FCF index.
858 * @vnpi - VNP index.
859 * Returns - none.
860 *
861 * This event is received from FW, when virtual link is established between
862 * Physical port[ENode] and FCF. If its new vnpi, then local node object is
863 * created on this FCF and set to [ONLINE] state.
864 * Lnode waits for FW_RDEV_CMD event to be received indicating that
865 * Fabric login is completed and lnode moves to [READY] state.
866 *
867 * This called with hw lock held
868 */
869static void
870csio_handle_link_up(struct csio_hw *hw, uint8_t portid, uint32_t fcfi,
871 uint32_t vnpi)
872{
873 struct csio_lnode *ln = NULL;
874
875 /* Lookup lnode based on vnpi */
876 ln = csio_ln_lookup_by_vnpi(hw, vnpi);
877 if (!ln) {
878 /* Pick lnode based on portid */
879 ln = csio_ln_lookup_by_portid(hw, portid);
880 if (!ln) {
881 csio_err(hw, "failed to lookup fcoe lnode on port:%d\n",
882 portid);
883 CSIO_DB_ASSERT(0);
884 return;
885 }
886
887 /* Check if lnode has valid vnp flowid */
888 if (ln->vnp_flowid != CSIO_INVALID_IDX) {
889 /* New VN-Port */
890 spin_unlock_irq(&hw->lock);
891 csio_lnode_alloc(hw);
892 spin_lock_irq(&hw->lock);
893 if (!ln) {
894 csio_err(hw,
895 "failed to allocate fcoe lnode"
896 "for port:%d vnpi:x%x\n",
897 portid, vnpi);
898 CSIO_DB_ASSERT(0);
899 return;
900 }
901 ln->portid = portid;
902 }
903 ln->vnp_flowid = vnpi;
904 ln->dev_num &= ~0xFFFF;
905 ln->dev_num |= vnpi;
906 }
907
908 /*Initialize fcfi */
909 ln->fcf_flowid = fcfi;
910
911 csio_info(hw, "Port:%d - FCOE LINK UP\n", portid);
912
913 CSIO_INC_STATS(ln, n_link_up);
914
915 /* Send LINKUP event to SM */
916 csio_post_event(&ln->sm, CSIO_LNE_LINKUP);
917}
918
919/*
920 * csio_post_event_rns
921 * @ln - FCOE lnode
922 * @evt - Given rnode event
923 * Returns - none
924 *
925 * Posts given rnode event to all FCOE rnodes connected with given Lnode.
926 * This routine is invoked when lnode receives LINK_DOWN/DOWN_LINK/CLOSE
927 * event.
928 *
929 * This called with hw lock held
930 */
931static void
932csio_post_event_rns(struct csio_lnode *ln, enum csio_rn_ev evt)
933{
934 struct csio_rnode *rnhead = (struct csio_rnode *) &ln->rnhead;
935 struct list_head *tmp, *next;
936 struct csio_rnode *rn;
937
938 list_for_each_safe(tmp, next, &rnhead->sm.sm_list) {
939 rn = (struct csio_rnode *) tmp;
940 csio_post_event(&rn->sm, evt);
941 }
942}
943
944/*
945 * csio_cleanup_rns
946 * @ln - FCOE lnode
947 * Returns - none
948 *
949 * Frees all FCOE rnodes connected with given Lnode.
950 *
951 * This called with hw lock held
952 */
953static void
954csio_cleanup_rns(struct csio_lnode *ln)
955{
956 struct csio_rnode *rnhead = (struct csio_rnode *) &ln->rnhead;
957 struct list_head *tmp, *next_rn;
958 struct csio_rnode *rn;
959
960 list_for_each_safe(tmp, next_rn, &rnhead->sm.sm_list) {
961 rn = (struct csio_rnode *) tmp;
962 csio_put_rnode(ln, rn);
963 }
964
965}
966
967/*
968 * csio_post_event_lns
969 * @ln - FCOE lnode
970 * @evt - Given lnode event
971 * Returns - none
972 *
973 * Posts given lnode event to all FCOE lnodes connected with given Lnode.
974 * This routine is invoked when lnode receives LINK_DOWN/DOWN_LINK/CLOSE
975 * event.
976 *
977 * This called with hw lock held
978 */
979static void
980csio_post_event_lns(struct csio_lnode *ln, enum csio_ln_ev evt)
981{
982 struct list_head *tmp;
983 struct csio_lnode *cln, *sln;
984
985 /* If NPIV lnode, send evt only to that and return */
986 if (csio_is_npiv_ln(ln)) {
987 csio_post_event(&ln->sm, evt);
988 return;
989 }
990
991 sln = ln;
992 /* Traverse children lnodes list and send evt */
993 list_for_each(tmp, &sln->cln_head) {
994 cln = (struct csio_lnode *) tmp;
995 csio_post_event(&cln->sm, evt);
996 }
997
998 /* Send evt to parent lnode */
999 csio_post_event(&ln->sm, evt);
1000}
1001
1002/*
1003 * csio_ln_down - Lcoal nport is down
1004 * @ln - FCOE Lnode
1005 * Returns - none
1006 *
1007 * Sends LINK_DOWN events to Lnode and its associated NPIVs lnodes.
1008 *
1009 * This called with hw lock held
1010 */
1011static void
1012csio_ln_down(struct csio_lnode *ln)
1013{
1014 csio_post_event_lns(ln, CSIO_LNE_LINK_DOWN);
1015}
1016
1017/*
1018 * csio_handle_link_down - Logical Linkdown event.
1019 * @hw - HW module.
1020 * @portid - Physical port number
1021 * @fcfi - FCF index.
1022 * @vnpi - VNP index.
1023 * Returns - none
1024 *
1025 * This event is received from FW, when virtual link goes down between
1026 * Physical port[ENode] and FCF. Lnode and its associated NPIVs lnode hosted on
1027 * this vnpi[VN-Port] will be de-instantiated.
1028 *
1029 * This called with hw lock held
1030 */
1031static void
1032csio_handle_link_down(struct csio_hw *hw, uint8_t portid, uint32_t fcfi,
1033 uint32_t vnpi)
1034{
1035 struct csio_fcf_info *fp;
1036 struct csio_lnode *ln;
1037
1038 /* Lookup lnode based on vnpi */
1039 ln = csio_ln_lookup_by_vnpi(hw, vnpi);
1040 if (ln) {
1041 fp = ln->fcfinfo;
1042 CSIO_INC_STATS(ln, n_link_down);
1043
1044 /*Warn if linkdown received if lnode is not in ready state */
1045 if (!csio_is_lnode_ready(ln)) {
1046 csio_ln_warn(ln,
1047 "warn: FCOE link is already in offline "
1048 "Ignoring Fcoe linkdown event on portid %d\n",
1049 portid);
1050 CSIO_INC_STATS(ln, n_evt_drop);
1051 return;
1052 }
1053
1054 /* Verify portid */
1055 if (fp->portid != portid) {
1056 csio_ln_warn(ln,
1057 "warn: FCOE linkdown recv with "
1058 "invalid port %d\n", portid);
1059 CSIO_INC_STATS(ln, n_evt_drop);
1060 return;
1061 }
1062
1063 /* verify fcfi */
1064 if (ln->fcf_flowid != fcfi) {
1065 csio_ln_warn(ln,
1066 "warn: FCOE linkdown recv with "
1067 "invalid fcfi x%x\n", fcfi);
1068 CSIO_INC_STATS(ln, n_evt_drop);
1069 return;
1070 }
1071
1072 csio_info(hw, "Port:%d - FCOE LINK DOWN\n", portid);
1073
1074 /* Send LINK_DOWN event to lnode s/m */
1075 csio_ln_down(ln);
1076
1077 return;
1078 } else {
1079 csio_warn(hw,
1080 "warn: FCOE linkdown recv with invalid vnpi x%x\n",
1081 vnpi);
1082 CSIO_INC_STATS(hw, n_evt_drop);
1083 }
1084}
1085
1086/*
1087 * csio_is_lnode_ready - Checks FCOE lnode is in ready state.
1088 * @ln: Lnode module
1089 *
1090 * Returns True if FCOE lnode is in ready state.
1091 */
1092int
1093csio_is_lnode_ready(struct csio_lnode *ln)
1094{
1095 return (csio_get_state(ln) == ((csio_sm_state_t)csio_lns_ready));
1096}
1097
1098/*****************************************************************************/
1099/* START: Lnode SM */
1100/*****************************************************************************/
1101/*
1102 * csio_lns_uninit - The request in uninit state.
1103 * @ln - FCOE lnode.
1104 * @evt - Event to be processed.
1105 *
1106 * Process the given lnode event which is currently in "uninit" state.
1107 * Invoked with HW lock held.
1108 * Return - none.
1109 */
1110static void
1111csio_lns_uninit(struct csio_lnode *ln, enum csio_ln_ev evt)
1112{
1113 struct csio_hw *hw = csio_lnode_to_hw(ln);
1114 struct csio_lnode *rln = hw->rln;
1115 int rv;
1116
1117 CSIO_INC_STATS(ln, n_evt_sm[evt]);
1118 switch (evt) {
1119 case CSIO_LNE_LINKUP:
1120 csio_set_state(&ln->sm, csio_lns_online);
1121 /* Read FCF only for physical lnode */
1122 if (csio_is_phys_ln(ln)) {
1123 rv = csio_ln_read_fcf_entry(ln,
1124 csio_ln_read_fcf_cbfn);
1125 if (rv != 0) {
1126 /* TODO: Send HW RESET event */
1127 CSIO_INC_STATS(ln, n_err);
1128 break;
1129 }
1130
1131 /* Add FCF record */
1132 list_add_tail(&ln->fcfinfo->list, &rln->fcf_lsthead);
1133 }
1134
1135 rv = csio_ln_vnp_read(ln, csio_ln_vnp_read_cbfn);
1136 if (rv != 0) {
1137 /* TODO: Send HW RESET event */
1138 CSIO_INC_STATS(ln, n_err);
1139 }
1140 break;
1141
1142 case CSIO_LNE_DOWN_LINK:
1143 break;
1144
1145 default:
1146 csio_ln_dbg(ln,
1147 "unexp ln event %d recv from did:x%x in "
1148 "ln state[uninit].\n", evt, ln->nport_id);
1149 CSIO_INC_STATS(ln, n_evt_unexp);
1150 break;
1151 } /* switch event */
1152}
1153
1154/*
1155 * csio_lns_online - The request in online state.
1156 * @ln - FCOE lnode.
1157 * @evt - Event to be processed.
1158 *
1159 * Process the given lnode event which is currently in "online" state.
1160 * Invoked with HW lock held.
1161 * Return - none.
1162 */
1163static void
1164csio_lns_online(struct csio_lnode *ln, enum csio_ln_ev evt)
1165{
1166 struct csio_hw *hw = csio_lnode_to_hw(ln);
1167
1168 CSIO_INC_STATS(ln, n_evt_sm[evt]);
1169 switch (evt) {
1170 case CSIO_LNE_LINKUP:
1171 csio_ln_warn(ln,
1172 "warn: FCOE link is up already "
1173 "Ignoring linkup on port:%d\n", ln->portid);
1174 CSIO_INC_STATS(ln, n_evt_drop);
1175 break;
1176
1177 case CSIO_LNE_FAB_INIT_DONE:
1178 csio_set_state(&ln->sm, csio_lns_ready);
1179
1180 spin_unlock_irq(&hw->lock);
1181 csio_lnode_async_event(ln, CSIO_LN_FC_LINKUP);
1182 spin_lock_irq(&hw->lock);
1183
1184 break;
1185
1186 case CSIO_LNE_LINK_DOWN:
1187 /* Fall through */
1188 case CSIO_LNE_DOWN_LINK:
1189 csio_set_state(&ln->sm, csio_lns_uninit);
1190 if (csio_is_phys_ln(ln)) {
1191 /* Remove FCF entry */
1192 list_del_init(&ln->fcfinfo->list);
1193 }
1194 break;
1195
1196 default:
1197 csio_ln_dbg(ln,
1198 "unexp ln event %d recv from did:x%x in "
1199 "ln state[uninit].\n", evt, ln->nport_id);
1200 CSIO_INC_STATS(ln, n_evt_unexp);
1201
1202 break;
1203 } /* switch event */
1204}
1205
1206/*
1207 * csio_lns_ready - The request in ready state.
1208 * @ln - FCOE lnode.
1209 * @evt - Event to be processed.
1210 *
1211 * Process the given lnode event which is currently in "ready" state.
1212 * Invoked with HW lock held.
1213 * Return - none.
1214 */
1215static void
1216csio_lns_ready(struct csio_lnode *ln, enum csio_ln_ev evt)
1217{
1218 struct csio_hw *hw = csio_lnode_to_hw(ln);
1219
1220 CSIO_INC_STATS(ln, n_evt_sm[evt]);
1221 switch (evt) {
1222 case CSIO_LNE_FAB_INIT_DONE:
1223 csio_ln_dbg(ln,
1224 "ignoring event %d recv from did x%x"
1225 "in ln state[ready].\n", evt, ln->nport_id);
1226 CSIO_INC_STATS(ln, n_evt_drop);
1227 break;
1228
1229 case CSIO_LNE_LINK_DOWN:
1230 csio_set_state(&ln->sm, csio_lns_offline);
1231 csio_post_event_rns(ln, CSIO_RNFE_DOWN);
1232
1233 spin_unlock_irq(&hw->lock);
1234 csio_lnode_async_event(ln, CSIO_LN_FC_LINKDOWN);
1235 spin_lock_irq(&hw->lock);
1236
1237 if (csio_is_phys_ln(ln)) {
1238 /* Remove FCF entry */
1239 list_del_init(&ln->fcfinfo->list);
1240 }
1241 break;
1242
1243 case CSIO_LNE_DOWN_LINK:
1244 csio_set_state(&ln->sm, csio_lns_offline);
1245 csio_post_event_rns(ln, CSIO_RNFE_DOWN);
1246
1247 /* Host need to issue aborts in case if FW has not returned
1248 * WRs with status "ABORTED"
1249 */
1250 spin_unlock_irq(&hw->lock);
1251 csio_lnode_async_event(ln, CSIO_LN_FC_LINKDOWN);
1252 spin_lock_irq(&hw->lock);
1253
1254 if (csio_is_phys_ln(ln)) {
1255 /* Remove FCF entry */
1256 list_del_init(&ln->fcfinfo->list);
1257 }
1258 break;
1259
1260 case CSIO_LNE_CLOSE:
1261 csio_set_state(&ln->sm, csio_lns_uninit);
1262 csio_post_event_rns(ln, CSIO_RNFE_CLOSE);
1263 break;
1264
1265 case CSIO_LNE_LOGO:
1266 csio_set_state(&ln->sm, csio_lns_offline);
1267 csio_post_event_rns(ln, CSIO_RNFE_DOWN);
1268 break;
1269
1270 default:
1271 csio_ln_dbg(ln,
1272 "unexp ln event %d recv from did:x%x in "
1273 "ln state[uninit].\n", evt, ln->nport_id);
1274 CSIO_INC_STATS(ln, n_evt_unexp);
1275 CSIO_DB_ASSERT(0);
1276 break;
1277 } /* switch event */
1278}
1279
1280/*
1281 * csio_lns_offline - The request in offline state.
1282 * @ln - FCOE lnode.
1283 * @evt - Event to be processed.
1284 *
1285 * Process the given lnode event which is currently in "offline" state.
1286 * Invoked with HW lock held.
1287 * Return - none.
1288 */
1289static void
1290csio_lns_offline(struct csio_lnode *ln, enum csio_ln_ev evt)
1291{
1292 struct csio_hw *hw = csio_lnode_to_hw(ln);
1293 struct csio_lnode *rln = hw->rln;
1294 int rv;
1295
1296 CSIO_INC_STATS(ln, n_evt_sm[evt]);
1297 switch (evt) {
1298 case CSIO_LNE_LINKUP:
1299 csio_set_state(&ln->sm, csio_lns_online);
1300 /* Read FCF only for physical lnode */
1301 if (csio_is_phys_ln(ln)) {
1302 rv = csio_ln_read_fcf_entry(ln,
1303 csio_ln_read_fcf_cbfn);
1304 if (rv != 0) {
1305 /* TODO: Send HW RESET event */
1306 CSIO_INC_STATS(ln, n_err);
1307 break;
1308 }
1309
1310 /* Add FCF record */
1311 list_add_tail(&ln->fcfinfo->list, &rln->fcf_lsthead);
1312 }
1313
1314 rv = csio_ln_vnp_read(ln, csio_ln_vnp_read_cbfn);
1315 if (rv != 0) {
1316 /* TODO: Send HW RESET event */
1317 CSIO_INC_STATS(ln, n_err);
1318 }
1319 break;
1320
1321 case CSIO_LNE_LINK_DOWN:
1322 case CSIO_LNE_DOWN_LINK:
1323 case CSIO_LNE_LOGO:
1324 csio_ln_dbg(ln,
1325 "ignoring event %d recv from did x%x"
1326 "in ln state[offline].\n", evt, ln->nport_id);
1327 CSIO_INC_STATS(ln, n_evt_drop);
1328 break;
1329
1330 case CSIO_LNE_CLOSE:
1331 csio_set_state(&ln->sm, csio_lns_uninit);
1332 csio_post_event_rns(ln, CSIO_RNFE_CLOSE);
1333 break;
1334
1335 default:
1336 csio_ln_dbg(ln,
1337 "unexp ln event %d recv from did:x%x in "
1338 "ln state[offline]\n", evt, ln->nport_id);
1339 CSIO_INC_STATS(ln, n_evt_unexp);
1340 CSIO_DB_ASSERT(0);
1341 break;
1342 } /* switch event */
1343}
1344
1345/*****************************************************************************/
1346/* END: Lnode SM */
1347/*****************************************************************************/
1348
1349static void
1350csio_free_fcfinfo(struct kref *kref)
1351{
1352 struct csio_fcf_info *fcfinfo = container_of(kref,
1353 struct csio_fcf_info, kref);
1354 kfree(fcfinfo);
1355}
1356
1357/* Helper routines for attributes */
1358/*
1359 * csio_lnode_state_to_str - Get current state of FCOE lnode.
1360 * @ln - lnode
1361 * @str - state of lnode.
1362 *
1363 */
1364void
1365csio_lnode_state_to_str(struct csio_lnode *ln, int8_t *str)
1366{
1367 if (csio_get_state(ln) == ((csio_sm_state_t)csio_lns_uninit)) {
1368 strcpy(str, "UNINIT");
1369 return;
1370 }
1371 if (csio_get_state(ln) == ((csio_sm_state_t)csio_lns_ready)) {
1372 strcpy(str, "READY");
1373 return;
1374 }
1375 if (csio_get_state(ln) == ((csio_sm_state_t)csio_lns_offline)) {
1376 strcpy(str, "OFFLINE");
1377 return;
1378 }
1379 strcpy(str, "UNKNOWN");
1380} /* csio_lnode_state_to_str */
1381
1382
1383int
1384csio_get_phy_port_stats(struct csio_hw *hw, uint8_t portid,
1385 struct fw_fcoe_port_stats *port_stats)
1386{
1387 struct csio_mb *mbp;
1388 struct fw_fcoe_port_cmd_params portparams;
1389 enum fw_retval retval;
1390 int idx;
1391
1392 mbp = mempool_alloc(hw->mb_mempool, GFP_ATOMIC);
1393 if (!mbp) {
1394 csio_err(hw, "FCoE FCF PARAMS command out of memory!\n");
1395 return -EINVAL;
1396 }
1397 portparams.portid = portid;
1398
1399 for (idx = 1; idx <= 3; idx++) {
1400 portparams.idx = (idx-1)*6 + 1;
1401 portparams.nstats = 6;
1402 if (idx == 3)
1403 portparams.nstats = 4;
1404 csio_fcoe_read_portparams_init_mb(hw, mbp, CSIO_MB_DEFAULT_TMO,
1405 &portparams, NULL);
1406 if (csio_mb_issue(hw, mbp)) {
1407 csio_err(hw, "Issue of FCoE port params failed!\n");
1408 mempool_free(mbp, hw->mb_mempool);
1409 return -EINVAL;
1410 }
1411 csio_mb_process_portparams_rsp(hw, mbp, &retval,
1412 &portparams, port_stats);
1413 }
1414
1415 mempool_free(mbp, hw->mb_mempool);
1416 return 0;
1417}
1418
1419/*
1420 * csio_ln_mgmt_wr_handler -Mgmt Work Request handler.
1421 * @wr - WR.
1422 * @len - WR len.
1423 * This handler is invoked when an outstanding mgmt WR is completed.
1424 * Its invoked in the context of FW event worker thread for every
1425 * mgmt event received.
1426 * Return - none.
1427 */
1428
1429static void
1430csio_ln_mgmt_wr_handler(struct csio_hw *hw, void *wr, uint32_t len)
1431{
1432 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw);
1433 struct csio_ioreq *io_req = NULL;
1434 struct fw_fcoe_els_ct_wr *wr_cmd;
1435
1436
1437 wr_cmd = (struct fw_fcoe_els_ct_wr *) wr;
1438
1439 if (len < sizeof(struct fw_fcoe_els_ct_wr)) {
1440 csio_err(mgmtm->hw,
1441 "Invalid ELS CT WR length recvd, len:%x\n", len);
1442 mgmtm->stats.n_err++;
1443 return;
1444 }
1445
1446 io_req = (struct csio_ioreq *) ((uintptr_t) wr_cmd->cookie);
1447 io_req->wr_status = csio_wr_status(wr_cmd);
1448
1449 /* lookup ioreq exists in our active Q */
1450 spin_lock_irq(&hw->lock);
1451 if (csio_mgmt_req_lookup(mgmtm, io_req) != 0) {
1452 csio_err(mgmtm->hw,
1453 "Error- Invalid IO handle recv in WR. handle: %p\n",
1454 io_req);
1455 mgmtm->stats.n_err++;
1456 spin_unlock_irq(&hw->lock);
1457 return;
1458 }
1459
1460 mgmtm = csio_hw_to_mgmtm(hw);
1461
1462 /* Dequeue from active queue */
1463 list_del_init(&io_req->sm.sm_list);
1464 mgmtm->stats.n_active--;
1465 spin_unlock_irq(&hw->lock);
1466
1467 /* io_req will be freed by completion handler */
1468 if (io_req->io_cbfn)
1469 io_req->io_cbfn(hw, io_req);
1470}
1471
1472/**
1473 * csio_fcoe_fwevt_handler - Event handler for Firmware FCoE events.
1474 * @hw: HW module
1475 * @cpl_op: CPL opcode
1476 * @cmd: FW cmd/WR.
1477 *
1478 * Process received FCoE cmd/WR event from FW.
1479 */
1480void
1481csio_fcoe_fwevt_handler(struct csio_hw *hw, __u8 cpl_op, __be64 *cmd)
1482{
1483 struct csio_lnode *ln;
1484 struct csio_rnode *rn;
1485 uint8_t portid, opcode = *(uint8_t *)cmd;
1486 struct fw_fcoe_link_cmd *lcmd;
1487 struct fw_wr_hdr *wr;
1488 struct fw_rdev_wr *rdev_wr;
1489 enum fw_fcoe_link_status lstatus;
1490 uint32_t fcfi, rdev_flowid, vnpi;
1491 enum csio_ln_ev evt;
1492
1493 if (cpl_op == CPL_FW6_MSG && opcode == FW_FCOE_LINK_CMD) {
1494
1495 lcmd = (struct fw_fcoe_link_cmd *)cmd;
1496 lstatus = lcmd->lstatus;
1497 portid = FW_FCOE_LINK_CMD_PORTID_GET(
1498 ntohl(lcmd->op_to_portid));
1499 fcfi = FW_FCOE_LINK_CMD_FCFI_GET(ntohl(lcmd->sub_opcode_fcfi));
1500 vnpi = FW_FCOE_LINK_CMD_VNPI_GET(ntohl(lcmd->vnpi_pkd));
1501
1502 if (lstatus == FCOE_LINKUP) {
1503
1504 /* HW lock here */
1505 spin_lock_irq(&hw->lock);
1506 csio_handle_link_up(hw, portid, fcfi, vnpi);
1507 spin_unlock_irq(&hw->lock);
1508 /* HW un lock here */
1509
1510 } else if (lstatus == FCOE_LINKDOWN) {
1511
1512 /* HW lock here */
1513 spin_lock_irq(&hw->lock);
1514 csio_handle_link_down(hw, portid, fcfi, vnpi);
1515 spin_unlock_irq(&hw->lock);
1516 /* HW un lock here */
1517 } else {
1518 csio_warn(hw, "Unexpected FCOE LINK status:0x%x\n",
5036f0a0 1519 lcmd->lstatus);
a3667aae
NKI		 1520 CSIO_INC_STATS(hw, n_cpl_unexp);
1521 }
1522 } else if (cpl_op == CPL_FW6_PLD) {
1523 wr = (struct fw_wr_hdr *) (cmd + 4);
e2ac9628 1524 if (FW_WR_OP_G(be32_to_cpu(wr->hi))
a3667aae
NKI		 1525 == FW_RDEV_WR) {
1526
1527 rdev_wr = (struct fw_rdev_wr *) (cmd + 4);
1528
1529 rdev_flowid = FW_RDEV_WR_FLOWID_GET(
1530 ntohl(rdev_wr->alloc_to_len16));
1531 vnpi = FW_RDEV_WR_ASSOC_FLOWID_GET(
1532 ntohl(rdev_wr->flags_to_assoc_flowid));
1533
1534 csio_dbg(hw,
1535 "FW_RDEV_WR: flowid:x%x ev_cause:x%x "
1536 "vnpi:0x%x\n", rdev_flowid,
1537 rdev_wr->event_cause, vnpi);
1538
1539 if (rdev_wr->protocol != PROT_FCOE) {
1540 csio_err(hw,
1541 "FW_RDEV_WR: invalid proto:x%x "
1542 "received with flowid:x%x\n",
1543 rdev_wr->protocol,
1544 rdev_flowid);
1545 CSIO_INC_STATS(hw, n_evt_drop);
1546 return;
1547 }
1548
1549 /* HW lock here */
1550 spin_lock_irq(&hw->lock);
1551 ln = csio_ln_lookup_by_vnpi(hw, vnpi);
1552 if (!ln) {
1553 csio_err(hw,
1554 "FW_DEV_WR: invalid vnpi:x%x received "
1555 "with flowid:x%x\n", vnpi, rdev_flowid);
1556 CSIO_INC_STATS(hw, n_evt_drop);
1557 goto out_pld;
1558 }
1559
1560 rn = csio_confirm_rnode(ln, rdev_flowid,
1561 &rdev_wr->u.fcoe_rdev);
1562 if (!rn) {
1563 csio_ln_dbg(ln,
1564 "Failed to confirm rnode "
1565 "for flowid:x%x\n", rdev_flowid);
1566 CSIO_INC_STATS(hw, n_evt_drop);
1567 goto out_pld;
1568 }
1569
1570 /* save previous event for debugging */
1571 ln->prev_evt = ln->cur_evt;
1572 ln->cur_evt = rdev_wr->event_cause;
1573 CSIO_INC_STATS(ln, n_evt_fw[rdev_wr->event_cause]);
1574
1575 /* Translate all the fabric events to lnode SM events */
1576 evt = CSIO_FWE_TO_LNE(rdev_wr->event_cause);
1577 if (evt) {
1578 csio_ln_dbg(ln,
1579 "Posting event to lnode event:%d "
1580 "cause:%d flowid:x%x\n", evt,
1581 rdev_wr->event_cause, rdev_flowid);
1582 csio_post_event(&ln->sm, evt);
1583 }
1584
1585 /* Handover event to rn SM here. */
1586 csio_rnode_fwevt_handler(rn, rdev_wr->event_cause);
1587out_pld:
1588 spin_unlock_irq(&hw->lock);
1589 return;
1590 } else {
1591 csio_warn(hw, "unexpected WR op(0x%x) recv\n",
e2ac9628 1592 FW_WR_OP_G(be32_to_cpu((wr->hi))));
a3667aae
NKI		 1593 CSIO_INC_STATS(hw, n_cpl_unexp);
1594 }
1595 } else if (cpl_op == CPL_FW6_MSG) {
1596 wr = (struct fw_wr_hdr *) (cmd);
e2ac9628 1597 if (FW_WR_OP_G(be32_to_cpu(wr->hi)) == FW_FCOE_ELS_CT_WR) {
a3667aae
NKI		 1598 csio_ln_mgmt_wr_handler(hw, wr,
1599 sizeof(struct fw_fcoe_els_ct_wr));
1600 } else {
1601 csio_warn(hw, "unexpected WR op(0x%x) recv\n",
e2ac9628 1602 FW_WR_OP_G(be32_to_cpu((wr->hi))));
a3667aae
NKI		 1603 CSIO_INC_STATS(hw, n_cpl_unexp);
1604 }
1605 } else {
1606 csio_warn(hw, "unexpected CPL op(0x%x) recv\n", opcode);
1607 CSIO_INC_STATS(hw, n_cpl_unexp);
1608 }
1609}
1610
1611/**
1612 * csio_lnode_start - Kickstart lnode discovery.
1613 * @ln: lnode
1614 *
1615 * This routine kickstarts the discovery by issuing an FCOE_LINK (up) command.
1616 */
1617int
1618csio_lnode_start(struct csio_lnode *ln)
1619{
1620 int rv = 0;
1621 if (csio_is_phys_ln(ln) && !(ln->flags & CSIO_LNF_LINK_ENABLE)) {
1622 rv = csio_fcoe_enable_link(ln, 1);
1623 ln->flags |= CSIO_LNF_LINK_ENABLE;
1624 }
1625
1626 return rv;
1627}
1628
1629/**
1630 * csio_lnode_stop - Stop the lnode.
1631 * @ln: lnode
1632 *
1633 * This routine is invoked by HW module to stop lnode and its associated NPIV
1634 * lnodes.
1635 */
1636void
1637csio_lnode_stop(struct csio_lnode *ln)
1638{
1639 csio_post_event_lns(ln, CSIO_LNE_DOWN_LINK);
1640 if (csio_is_phys_ln(ln) && (ln->flags & CSIO_LNF_LINK_ENABLE)) {
1641 csio_fcoe_enable_link(ln, 0);
1642 ln->flags &= ~CSIO_LNF_LINK_ENABLE;
1643 }
1644 csio_ln_dbg(ln, "stopping ln :%p\n", ln);
1645}
1646
1647/**
1648 * csio_lnode_close - Close an lnode.
1649 * @ln: lnode
1650 *
1651 * This routine is invoked by HW module to close an lnode and its
1652 * associated NPIV lnodes. Lnode and its associated NPIV lnodes are
1653 * set to uninitialized state.
1654 */
1655void
1656csio_lnode_close(struct csio_lnode *ln)
1657{
1658 csio_post_event_lns(ln, CSIO_LNE_CLOSE);
1659 if (csio_is_phys_ln(ln))
1660 ln->vnp_flowid = CSIO_INVALID_IDX;
1661
1662 csio_ln_dbg(ln, "closed ln :%p\n", ln);
1663}
1664
1665/*
1666 * csio_ln_prep_ecwr - Prepare ELS/CT WR.
1667 * @io_req - IO request.
1668 * @wr_len - WR len
1669 * @immd_len - WR immediate data
1670 * @sub_op - Sub opcode
1671 * @sid - source portid.
1672 * @did - destination portid
1673 * @flow_id - flowid
1674 * @fw_wr - ELS/CT WR to be prepared.
1675 * Returns: 0 - on success
1676 */
1677static int
1678csio_ln_prep_ecwr(struct csio_ioreq *io_req, uint32_t wr_len,
1679 uint32_t immd_len, uint8_t sub_op, uint32_t sid,
1680 uint32_t did, uint32_t flow_id, uint8_t *fw_wr)
1681{
1682 struct fw_fcoe_els_ct_wr *wr;
5036f0a0 1683 __be32 port_id;
a3667aae
NKI		 1684
1685 wr = (struct fw_fcoe_els_ct_wr *)fw_wr;
e2ac9628 1686 wr->op_immdlen = cpu_to_be32(FW_WR_OP_V(FW_FCOE_ELS_CT_WR) |
a3667aae
NKI		 1687 FW_FCOE_ELS_CT_WR_IMMDLEN(immd_len));
1688
1689 wr_len = DIV_ROUND_UP(wr_len, 16);
e2ac9628
HS		 1690 wr->flowid_len16 = cpu_to_be32(FW_WR_FLOWID_V(flow_id) |
1691 FW_WR_LEN16_V(wr_len));
a3667aae
NKI		 1692 wr->els_ct_type = sub_op;
1693 wr->ctl_pri = 0;
1694 wr->cp_en_class = 0;
1695 wr->cookie = io_req->fw_handle;
5036f0a0
NKI		 1696 wr->iqid = cpu_to_be16(csio_q_physiqid(
1697 io_req->lnode->hwp, io_req->iq_idx));
a3667aae
NKI		 1698 wr->fl_to_sp = FW_FCOE_ELS_CT_WR_SP(1);
1699 wr->tmo_val = (uint8_t) io_req->tmo;
1700 port_id = htonl(sid);
1701 memcpy(wr->l_id, PORT_ID_PTR(port_id), 3);
1702 port_id = htonl(did);
1703 memcpy(wr->r_id, PORT_ID_PTR(port_id), 3);
1704
1705 /* Prepare RSP SGL */
1706 wr->rsp_dmalen = cpu_to_be32(io_req->dma_buf.len);
1707 wr->rsp_dmaaddr = cpu_to_be64(io_req->dma_buf.paddr);
1708 return 0;
1709}
1710
1711/*
1712 * csio_ln_mgmt_submit_wr - Post elsct work request.
1713 * @mgmtm - mgmtm
1714 * @io_req - io request.
1715 * @sub_op - ELS or CT request type
1716 * @pld - Dma Payload buffer
1717 * @pld_len - Payload len
1718 * Prepares ELSCT Work request and sents it to FW.
1719 * Returns: 0 - on success
1720 */
1721static int
1722csio_ln_mgmt_submit_wr(struct csio_mgmtm *mgmtm, struct csio_ioreq *io_req,
1723 uint8_t sub_op, struct csio_dma_buf *pld,
1724 uint32_t pld_len)
1725{
1726 struct csio_wr_pair wrp;
1727 struct csio_lnode *ln = io_req->lnode;
1728 struct csio_rnode *rn = io_req->rnode;
1729 struct csio_hw *hw = mgmtm->hw;
1730 uint8_t fw_wr[64];
1731 struct ulptx_sgl dsgl;
1732 uint32_t wr_size = 0;
1733 uint8_t im_len = 0;
1734 uint32_t wr_off = 0;
1735
1736 int ret = 0;
1737
1738 /* Calculate WR Size for this ELS REQ */
1739 wr_size = sizeof(struct fw_fcoe_els_ct_wr);
1740
1741 /* Send as immediate data if pld < 256 */
1742 if (pld_len < 256) {
1743 wr_size += ALIGN(pld_len, 8);
1744 im_len = (uint8_t)pld_len;
1745 } else
1746 wr_size += sizeof(struct ulptx_sgl);
1747
1748 /* Roundup WR size in units of 16 bytes */
1749 wr_size = ALIGN(wr_size, 16);
1750
1751 /* Get WR to send ELS REQ */
1752 ret = csio_wr_get(hw, mgmtm->eq_idx, wr_size, &wrp);
1753 if (ret != 0) {
1754 csio_err(hw, "Failed to get WR for ec_req %p ret:%d\n",
1755 io_req, ret);
1756 return ret;
1757 }
1758
1759 /* Prepare Generic WR used by all ELS/CT cmd */
1760 csio_ln_prep_ecwr(io_req, wr_size, im_len, sub_op,
1761 ln->nport_id, rn->nport_id,
1762 csio_rn_flowid(rn),
1763 &fw_wr[0]);
1764
1765 /* Copy ELS/CT WR CMD */
1766 csio_wr_copy_to_wrp(&fw_wr[0], &wrp, wr_off,
1767 sizeof(struct fw_fcoe_els_ct_wr));
1768 wr_off += sizeof(struct fw_fcoe_els_ct_wr);
1769
1770 /* Copy payload to Immediate section of WR */
1771 if (im_len)
1772 csio_wr_copy_to_wrp(pld->vaddr, &wrp, wr_off, im_len);
1773 else {
1774 /* Program DSGL to dma payload */
d7990b0c 1775 dsgl.cmd_nsge = htonl(ULPTX_CMD_V(ULP_TX_SC_DSGL) |
bdc590b9 1776 ULPTX_MORE_F | ULPTX_NSGE_V(1));
a3667aae
NKI		 1777 dsgl.len0 = cpu_to_be32(pld_len);
1778 dsgl.addr0 = cpu_to_be64(pld->paddr);
1779 csio_wr_copy_to_wrp(&dsgl, &wrp, ALIGN(wr_off, 8),
1780 sizeof(struct ulptx_sgl));
1781 }
1782
1783 /* Issue work request to xmit ELS/CT req to FW */
1784 csio_wr_issue(mgmtm->hw, mgmtm->eq_idx, false);
1785 return ret;
1786}
1787
1788/*
1789 * csio_ln_mgmt_submit_req - Submit FCOE Mgmt request.
1790 * @io_req - IO Request
1791 * @io_cbfn - Completion handler.
1792 * @req_type - ELS or CT request type
1793 * @pld - Dma Payload buffer
1794 * @pld_len - Payload len
1795 *
1796 *
1797 * This API used submit managment ELS/CT request.
1798 * This called with hw lock held
1799 * Returns: 0 - on success
1800 * -ENOMEM - on error.
1801 */
1802static int
1803csio_ln_mgmt_submit_req(struct csio_ioreq *io_req,
1804 void (*io_cbfn) (struct csio_hw *, struct csio_ioreq *),
1805 enum fcoe_cmn_type req_type, struct csio_dma_buf *pld,
1806 uint32_t pld_len)
1807{
1808 struct csio_hw *hw = csio_lnode_to_hw(io_req->lnode);
1809 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw);
1810 int rv;
1811
42c335f7
KC		 1812 BUG_ON(pld_len > pld->len);
1813
a3667aae
NKI		 1814 io_req->io_cbfn = io_cbfn; /* Upper layer callback handler */
1815 io_req->fw_handle = (uintptr_t) (io_req);
1816 io_req->eq_idx = mgmtm->eq_idx;
1817 io_req->iq_idx = mgmtm->iq_idx;
1818
1819 rv = csio_ln_mgmt_submit_wr(mgmtm, io_req, req_type, pld, pld_len);
1820 if (rv == 0) {
1821 list_add_tail(&io_req->sm.sm_list, &mgmtm->active_q);
1822 mgmtm->stats.n_active++;
1823 }
1824 return rv;
1825}
1826
1827/*
1828 * csio_ln_fdmi_init - FDMI Init entry point.
1829 * @ln: lnode
1830 */
1831static int
1832csio_ln_fdmi_init(struct csio_lnode *ln)
1833{
1834 struct csio_hw *hw = csio_lnode_to_hw(ln);
1835 struct csio_dma_buf *dma_buf;
1836
1837 /* Allocate MGMT request required for FDMI */
1838 ln->mgmt_req = kzalloc(sizeof(struct csio_ioreq), GFP_KERNEL);
1839 if (!ln->mgmt_req) {
1840 csio_ln_err(ln, "Failed to alloc ioreq for FDMI\n");
1841 CSIO_INC_STATS(hw, n_err_nomem);
1842 return -ENOMEM;
1843 }
1844
1845 /* Allocate Dma buffers for FDMI response Payload */
1846 dma_buf = &ln->mgmt_req->dma_buf;
1847 dma_buf->len = 2048;
c22b332d
CH		 1848 dma_buf->vaddr = dma_alloc_coherent(&hw->pdev->dev, dma_buf->len,
1849 &dma_buf->paddr, GFP_KERNEL);
a3667aae
NKI		 1850 if (!dma_buf->vaddr) {
1851 csio_err(hw, "Failed to alloc DMA buffer for FDMI!\n");
1852 kfree(ln->mgmt_req);
1853 ln->mgmt_req = NULL;
1854 return -ENOMEM;
1855 }
1856
1857 ln->flags |= CSIO_LNF_FDMI_ENABLE;
1858 return 0;
1859}
1860
1861/*
1862 * csio_ln_fdmi_exit - FDMI exit entry point.
1863 * @ln: lnode
1864 */
1865static int
1866csio_ln_fdmi_exit(struct csio_lnode *ln)
1867{
1868 struct csio_dma_buf *dma_buf;
1869 struct csio_hw *hw = csio_lnode_to_hw(ln);
1870
1871 if (!ln->mgmt_req)
1872 return 0;
1873
1874 dma_buf = &ln->mgmt_req->dma_buf;
1875 if (dma_buf->vaddr)
c22b332d 1876 dma_free_coherent(&hw->pdev->dev, dma_buf->len, dma_buf->vaddr,
a3667aae
NKI		 1877 dma_buf->paddr);
1878
1879 kfree(ln->mgmt_req);
1880 return 0;
1881}
1882
1883int
1884csio_scan_done(struct csio_lnode *ln, unsigned long ticks,
1885 unsigned long time, unsigned long max_scan_ticks,
1886 unsigned long delta_scan_ticks)
1887{
1888 int rv = 0;
1889
1890 if (time >= max_scan_ticks)
1891 return 1;
1892
1893 if (!ln->tgt_scan_tick)
1894 ln->tgt_scan_tick = ticks;
1895
1896 if (((ticks - ln->tgt_scan_tick) >= delta_scan_ticks)) {
1897 if (!ln->last_scan_ntgts)
1898 ln->last_scan_ntgts = ln->n_scsi_tgts;
1899 else {
1900 if (ln->last_scan_ntgts == ln->n_scsi_tgts)
1901 return 1;
1902
1903 ln->last_scan_ntgts = ln->n_scsi_tgts;
1904 }
1905 ln->tgt_scan_tick = ticks;
1906 }
1907 return rv;
1908}
1909
1910/*
1911 * csio_notify_lnodes:
1912 * @hw: HW module
1913 * @note: Notification
1914 *
1915 * Called from the HW SM to fan out notifications to the
1916 * Lnode SM. Since the HW SM is entered with lock held,
1917 * there is no need to hold locks here.
1918 *
1919 */
1920void
1921csio_notify_lnodes(struct csio_hw *hw, enum csio_ln_notify note)
1922{
1923 struct list_head *tmp;
1924 struct csio_lnode *ln;
1925
1926 csio_dbg(hw, "Notifying all nodes of event %d\n", note);
1927
1928 /* Traverse children lnodes list and send evt */
1929 list_for_each(tmp, &hw->sln_head) {
1930 ln = (struct csio_lnode *) tmp;
1931
1932 switch (note) {
1933 case CSIO_LN_NOTIFY_HWREADY:
1934 csio_lnode_start(ln);
1935 break;
1936
1937 case CSIO_LN_NOTIFY_HWRESET:
1938 case CSIO_LN_NOTIFY_HWREMOVE:
1939 csio_lnode_close(ln);
1940 break;
1941
1942 case CSIO_LN_NOTIFY_HWSTOP:
1943 csio_lnode_stop(ln);
1944 break;
1945
1946 default:
1947 break;
1948
1949 }
1950 }
1951}
1952
1953/*
1954 * csio_disable_lnodes:
1955 * @hw: HW module
1956 * @portid:port id
1957 * @disable: disable/enable flag.
1958 * If disable=1, disables all lnode hosted on given physical port.
1959 * otherwise enables all the lnodes on given phsysical port.
1960 * This routine need to called with hw lock held.
1961 */
1962void
1963csio_disable_lnodes(struct csio_hw *hw, uint8_t portid, bool disable)
1964{
1965 struct list_head *tmp;
1966 struct csio_lnode *ln;
1967
1968 csio_dbg(hw, "Notifying event to all nodes of port:%d\n", portid);
1969
1970 /* Traverse sibling lnodes list and send evt */
1971 list_for_each(tmp, &hw->sln_head) {
1972 ln = (struct csio_lnode *) tmp;
1973 if (ln->portid != portid)
1974 continue;
1975
1976 if (disable)
1977 csio_lnode_stop(ln);
1978 else
1979 csio_lnode_start(ln);
1980 }
1981}
1982
1983/*
1984 * csio_ln_init - Initialize an lnode.
1985 * @ln: lnode
1986 *
1987 */
1988static int
1989csio_ln_init(struct csio_lnode *ln)
1990{
1991 int rv = -EINVAL;
1992 struct csio_lnode *rln, *pln;
1993 struct csio_hw *hw = csio_lnode_to_hw(ln);
1994
1995 csio_init_state(&ln->sm, csio_lns_uninit);
1996 ln->vnp_flowid = CSIO_INVALID_IDX;
1997 ln->fcf_flowid = CSIO_INVALID_IDX;
1998
1999 if (csio_is_root_ln(ln)) {
2000
2001 /* This is the lnode used during initialization */
2002
2003 ln->fcfinfo = kzalloc(sizeof(struct csio_fcf_info), GFP_KERNEL);
2004 if (!ln->fcfinfo) {
2005 csio_ln_err(ln, "Failed to alloc FCF record\n");
2006 CSIO_INC_STATS(hw, n_err_nomem);
2007 goto err;
2008 }
2009
2010 INIT_LIST_HEAD(&ln->fcf_lsthead);
2011 kref_init(&ln->fcfinfo->kref);
2012
2013 if (csio_fdmi_enable && csio_ln_fdmi_init(ln))
2014 goto err;
2015
2016 } else { /* Either a non-root physical or a virtual lnode */
2017
2018 /*
2019 * THe rest is common for non-root physical and NPIV lnodes.
2020 * Just get references to all other modules
2021 */
2022 rln = csio_root_lnode(ln);
2023
2024 if (csio_is_npiv_ln(ln)) {
2025 /* NPIV */
2026 pln = csio_parent_lnode(ln);
2027 kref_get(&pln->fcfinfo->kref);
2028 ln->fcfinfo = pln->fcfinfo;
2029 } else {
2030 /* Another non-root physical lnode (FCF) */
2031 ln->fcfinfo = kzalloc(sizeof(struct csio_fcf_info),
2032 GFP_KERNEL);
2033 if (!ln->fcfinfo) {
2034 csio_ln_err(ln, "Failed to alloc FCF info\n");
2035 CSIO_INC_STATS(hw, n_err_nomem);
2036 goto err;
2037 }
2038
2039 kref_init(&ln->fcfinfo->kref);
2040
2041 if (csio_fdmi_enable && csio_ln_fdmi_init(ln))
2042 goto err;
2043 }
2044
2045 } /* if (!csio_is_root_ln(ln)) */
2046
2047 return 0;
2048err:
2049 return rv;
2050}
2051
2052static void
2053csio_ln_exit(struct csio_lnode *ln)
2054{
2055 struct csio_lnode *pln;
2056
2057 csio_cleanup_rns(ln);
2058 if (csio_is_npiv_ln(ln)) {
2059 pln = csio_parent_lnode(ln);
2060 kref_put(&pln->fcfinfo->kref, csio_free_fcfinfo);
2061 } else {
2062 kref_put(&ln->fcfinfo->kref, csio_free_fcfinfo);
2063 if (csio_fdmi_enable)
2064 csio_ln_fdmi_exit(ln);
2065 }
2066 ln->fcfinfo = NULL;
2067}
2068
2069/**
2070 * csio_lnode_init - Initialize the members of an lnode.
2071 * @ln: lnode
2072 *
2073 */
2074int
2075csio_lnode_init(struct csio_lnode *ln, struct csio_hw *hw,
2076 struct csio_lnode *pln)
2077{
2078 int rv = -EINVAL;
2079
2080 /* Link this lnode to hw */
2081 csio_lnode_to_hw(ln) = hw;
2082
2083 /* Link child to parent if child lnode */
2084 if (pln)
2085 ln->pln = pln;
2086 else
2087 ln->pln = NULL;
2088
2089 /* Initialize scsi_tgt and timers to zero */
2090 ln->n_scsi_tgts = 0;
2091 ln->last_scan_ntgts = 0;
2092 ln->tgt_scan_tick = 0;
2093
2094 /* Initialize rnode list */
2095 INIT_LIST_HEAD(&ln->rnhead);
2096 INIT_LIST_HEAD(&ln->cln_head);
2097
2098 /* Initialize log level for debug */
2099 ln->params.log_level = hw->params.log_level;
2100
2101 if (csio_ln_init(ln))
2102 goto err;
2103
2104 /* Add lnode to list of sibling or children lnodes */
2105 spin_lock_irq(&hw->lock);
2106 list_add_tail(&ln->sm.sm_list, pln ? &pln->cln_head : &hw->sln_head);
2107 if (pln)
2108 pln->num_vports++;
2109 spin_unlock_irq(&hw->lock);
2110
2111 hw->num_lns++;
2112
2113 return 0;
2114err:
2115 csio_lnode_to_hw(ln) = NULL;
2116 return rv;
2117}
2118
2119/**
2120 * csio_lnode_exit - De-instantiate an lnode.
2121 * @ln: lnode
2122 *
2123 */
2124void
2125csio_lnode_exit(struct csio_lnode *ln)
2126{
2127 struct csio_hw *hw = csio_lnode_to_hw(ln);
2128
2129 csio_ln_exit(ln);
2130
2131 /* Remove this lnode from hw->sln_head */
2132 spin_lock_irq(&hw->lock);
2133
2134 list_del_init(&ln->sm.sm_list);
2135
2136 /* If it is children lnode, decrement the
2137 * counter in its parent lnode
2138 */
2139 if (ln->pln)
2140 ln->pln->num_vports--;
2141
2142 /* Update root lnode pointer */
2143 if (list_empty(&hw->sln_head))
2144 hw->rln = NULL;
2145 else
2146 hw->rln = (struct csio_lnode *)csio_list_next(&hw->sln_head);
2147
2148 spin_unlock_irq(&hw->lock);
2149
2150 csio_lnode_to_hw(ln) = NULL;
2151 hw->num_lns--;
2152}
Linux 6.x block layer and io_uring tree(s)