config: tegra3: enable /dev mount with ACL
[linux-2.6.git] / drivers / scsi / bnx2fc / bnx2fc_tgt.c
1 /* bnx2fc_tgt.c: Broadcom NetXtreme II Linux FCoE offload driver.
2  * Handles operations such as session offload/upload etc, and manages
3  * session resources such as connection id and qp resources.
4  *
5  * Copyright (c) 2008 - 2011 Broadcom Corporation
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation.
10  *
11  * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com)
12  */
13
14 #include "bnx2fc.h"
15 static void bnx2fc_upld_timer(unsigned long data);
16 static void bnx2fc_ofld_timer(unsigned long data);
17 static int bnx2fc_init_tgt(struct bnx2fc_rport *tgt,
18                            struct fcoe_port *port,
19                            struct fc_rport_priv *rdata);
20 static u32 bnx2fc_alloc_conn_id(struct bnx2fc_hba *hba,
21                                 struct bnx2fc_rport *tgt);
22 static int bnx2fc_alloc_session_resc(struct bnx2fc_hba *hba,
23                               struct bnx2fc_rport *tgt);
24 static void bnx2fc_free_session_resc(struct bnx2fc_hba *hba,
25                               struct bnx2fc_rport *tgt);
26 static void bnx2fc_free_conn_id(struct bnx2fc_hba *hba, u32 conn_id);
27
28 static void bnx2fc_upld_timer(unsigned long data)
29 {
30
31         struct bnx2fc_rport *tgt = (struct bnx2fc_rport *)data;
32
33         BNX2FC_TGT_DBG(tgt, "upld_timer - Upload compl not received!!\n");
34         /* fake upload completion */
35         clear_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags);
36         set_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
37         wake_up_interruptible(&tgt->upld_wait);
38 }
39
40 static void bnx2fc_ofld_timer(unsigned long data)
41 {
42
43         struct bnx2fc_rport *tgt = (struct bnx2fc_rport *)data;
44
45         BNX2FC_TGT_DBG(tgt, "entered bnx2fc_ofld_timer\n");
46         /* NOTE: This function should never be called, as
47          * offload should never timeout
48          */
49         /*
50          * If the timer has expired, this session is dead
51          * Clear offloaded flag and logout of this device.
52          * Since OFFLOADED flag is cleared, this case
53          * will be considered as offload error and the
54          * port will be logged off, and conn_id, session
55          * resources are freed up in bnx2fc_offload_session
56          */
57         clear_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags);
58         set_bit(BNX2FC_FLAG_OFLD_REQ_CMPL, &tgt->flags);
59         wake_up_interruptible(&tgt->ofld_wait);
60 }
61
62 static void bnx2fc_offload_session(struct fcoe_port *port,
63                                         struct bnx2fc_rport *tgt,
64                                         struct fc_rport_priv *rdata)
65 {
66         struct fc_lport *lport = rdata->local_port;
67         struct fc_rport *rport = rdata->rport;
68         struct bnx2fc_interface *interface = port->priv;
69         struct bnx2fc_hba *hba = interface->hba;
70         int rval;
71         int i = 0;
72
73         /* Initialize bnx2fc_rport */
74         /* NOTE: tgt is already bzero'd */
75         rval = bnx2fc_init_tgt(tgt, port, rdata);
76         if (rval) {
77                 printk(KERN_ERR PFX "Failed to allocate conn id for "
78                         "port_id (%6x)\n", rport->port_id);
79                 goto ofld_err;
80         }
81
82         /* Allocate session resources */
83         rval = bnx2fc_alloc_session_resc(hba, tgt);
84         if (rval) {
85                 printk(KERN_ERR PFX "Failed to allocate resources\n");
86                 goto ofld_err;
87         }
88
89         /*
90          * Initialize FCoE session offload process.
91          * Upon completion of offload process add
92          * rport to list of rports
93          */
94 retry_ofld:
95         clear_bit(BNX2FC_FLAG_OFLD_REQ_CMPL, &tgt->flags);
96         rval = bnx2fc_send_session_ofld_req(port, tgt);
97         if (rval) {
98                 printk(KERN_ERR PFX "ofld_req failed\n");
99                 goto ofld_err;
100         }
101
102         /*
103          * wait for the session is offloaded and enabled. 3 Secs
104          * should be ample time for this process to complete.
105          */
106         setup_timer(&tgt->ofld_timer, bnx2fc_ofld_timer, (unsigned long)tgt);
107         mod_timer(&tgt->ofld_timer, jiffies + BNX2FC_FW_TIMEOUT);
108
109         wait_event_interruptible(tgt->ofld_wait,
110                                  (test_bit(
111                                   BNX2FC_FLAG_OFLD_REQ_CMPL,
112                                   &tgt->flags)));
113         if (signal_pending(current))
114                 flush_signals(current);
115
116         del_timer_sync(&tgt->ofld_timer);
117
118         if (!(test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags))) {
119                 if (test_and_clear_bit(BNX2FC_FLAG_CTX_ALLOC_FAILURE,
120                                        &tgt->flags)) {
121                         BNX2FC_TGT_DBG(tgt, "ctx_alloc_failure, "
122                                 "retry ofld..%d\n", i++);
123                         msleep_interruptible(1000);
124                         if (i > 3) {
125                                 i = 0;
126                                 goto ofld_err;
127                         }
128                         goto retry_ofld;
129                 }
130                 goto ofld_err;
131         }
132         if (bnx2fc_map_doorbell(tgt)) {
133                 printk(KERN_ERR PFX "map doorbell failed - no mem\n");
134                 /* upload will take care of cleaning up sess resc */
135                 lport->tt.rport_logoff(rdata);
136         }
137         /* Arm CQ */
138         bnx2fc_arm_cq(tgt);
139         return;
140
141 ofld_err:
142         /* couldn't offload the session. log off from this rport */
143         BNX2FC_TGT_DBG(tgt, "bnx2fc_offload_session - offload error\n");
144         lport->tt.rport_logoff(rdata);
145         /* Free session resources */
146         bnx2fc_free_session_resc(hba, tgt);
147         if (tgt->fcoe_conn_id != -1)
148                 bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
149 }
150
151 void bnx2fc_flush_active_ios(struct bnx2fc_rport *tgt)
152 {
153         struct bnx2fc_cmd *io_req;
154         struct list_head *list;
155         struct list_head *tmp;
156         int rc;
157         int i = 0;
158         BNX2FC_TGT_DBG(tgt, "Entered flush_active_ios - %d\n",
159                        tgt->num_active_ios.counter);
160
161         spin_lock_bh(&tgt->tgt_lock);
162         tgt->flush_in_prog = 1;
163
164         list_for_each_safe(list, tmp, &tgt->active_cmd_queue) {
165                 i++;
166                 io_req = (struct bnx2fc_cmd *)list;
167                 list_del_init(&io_req->link);
168                 io_req->on_active_queue = 0;
169                 BNX2FC_IO_DBG(io_req, "cmd_queue cleanup\n");
170
171                 if (cancel_delayed_work(&io_req->timeout_work)) {
172                         if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
173                                                 &io_req->req_flags)) {
174                                 /* Handle eh_abort timeout */
175                                 BNX2FC_IO_DBG(io_req, "eh_abort for IO "
176                                               "cleaned up\n");
177                                 complete(&io_req->tm_done);
178                         }
179                         kref_put(&io_req->refcount,
180                                  bnx2fc_cmd_release); /* drop timer hold */
181                 }
182
183                 set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags);
184                 set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags);
185                 rc = bnx2fc_initiate_cleanup(io_req);
186                 BUG_ON(rc);
187         }
188
189         list_for_each_safe(list, tmp, &tgt->els_queue) {
190                 i++;
191                 io_req = (struct bnx2fc_cmd *)list;
192                 list_del_init(&io_req->link);
193                 io_req->on_active_queue = 0;
194
195                 BNX2FC_IO_DBG(io_req, "els_queue cleanup\n");
196
197                 if (cancel_delayed_work(&io_req->timeout_work))
198                         kref_put(&io_req->refcount,
199                                  bnx2fc_cmd_release); /* drop timer hold */
200
201                 if ((io_req->cb_func) && (io_req->cb_arg)) {
202                         io_req->cb_func(io_req->cb_arg);
203                         io_req->cb_arg = NULL;
204                 }
205
206                 rc = bnx2fc_initiate_cleanup(io_req);
207                 BUG_ON(rc);
208         }
209
210         list_for_each_safe(list, tmp, &tgt->io_retire_queue) {
211                 i++;
212                 io_req = (struct bnx2fc_cmd *)list;
213                 list_del_init(&io_req->link);
214
215                 BNX2FC_IO_DBG(io_req, "retire_queue flush\n");
216
217                 if (cancel_delayed_work(&io_req->timeout_work))
218                         kref_put(&io_req->refcount, bnx2fc_cmd_release);
219
220                 clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags);
221         }
222
223         BNX2FC_TGT_DBG(tgt, "IOs flushed = %d\n", i);
224         i = 0;
225         spin_unlock_bh(&tgt->tgt_lock);
226         /* wait for active_ios to go to 0 */
227         while ((tgt->num_active_ios.counter != 0) && (i++ < BNX2FC_WAIT_CNT))
228                 msleep(25);
229         if (tgt->num_active_ios.counter != 0)
230                 printk(KERN_ERR PFX "CLEANUP on port 0x%x:"
231                                     " active_ios = %d\n",
232                         tgt->rdata->ids.port_id, tgt->num_active_ios.counter);
233         spin_lock_bh(&tgt->tgt_lock);
234         tgt->flush_in_prog = 0;
235         spin_unlock_bh(&tgt->tgt_lock);
236 }
237
238 static void bnx2fc_upload_session(struct fcoe_port *port,
239                                         struct bnx2fc_rport *tgt)
240 {
241         struct bnx2fc_interface *interface = port->priv;
242         struct bnx2fc_hba *hba = interface->hba;
243
244         BNX2FC_TGT_DBG(tgt, "upload_session: active_ios = %d\n",
245                 tgt->num_active_ios.counter);
246
247         /*
248          * Called with hba->hba_mutex held.
249          * This is a blocking call
250          */
251         clear_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
252         bnx2fc_send_session_disable_req(port, tgt);
253
254         /*
255          * wait for upload to complete. 3 Secs
256          * should be sufficient time for this process to complete.
257          */
258         setup_timer(&tgt->upld_timer, bnx2fc_upld_timer, (unsigned long)tgt);
259         mod_timer(&tgt->upld_timer, jiffies + BNX2FC_FW_TIMEOUT);
260
261         BNX2FC_TGT_DBG(tgt, "waiting for disable compl\n");
262         wait_event_interruptible(tgt->upld_wait,
263                                  (test_bit(
264                                   BNX2FC_FLAG_UPLD_REQ_COMPL,
265                                   &tgt->flags)));
266
267         if (signal_pending(current))
268                 flush_signals(current);
269
270         del_timer_sync(&tgt->upld_timer);
271
272         /*
273          * traverse thru the active_q and tmf_q and cleanup
274          * IOs in these lists
275          */
276         BNX2FC_TGT_DBG(tgt, "flush/upload - disable wait flags = 0x%lx\n",
277                        tgt->flags);
278         bnx2fc_flush_active_ios(tgt);
279
280         /* Issue destroy KWQE */
281         if (test_bit(BNX2FC_FLAG_DISABLED, &tgt->flags)) {
282                 BNX2FC_TGT_DBG(tgt, "send destroy req\n");
283                 clear_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
284                 bnx2fc_send_session_destroy_req(hba, tgt);
285
286                 /* wait for destroy to complete */
287                 setup_timer(&tgt->upld_timer,
288                             bnx2fc_upld_timer, (unsigned long)tgt);
289                 mod_timer(&tgt->upld_timer, jiffies + BNX2FC_FW_TIMEOUT);
290
291                 wait_event_interruptible(tgt->upld_wait,
292                                          (test_bit(
293                                           BNX2FC_FLAG_UPLD_REQ_COMPL,
294                                           &tgt->flags)));
295
296                 if (!(test_bit(BNX2FC_FLAG_DESTROYED, &tgt->flags)))
297                         printk(KERN_ERR PFX "ERROR!! destroy timed out\n");
298
299                 BNX2FC_TGT_DBG(tgt, "destroy wait complete flags = 0x%lx\n",
300                         tgt->flags);
301                 if (signal_pending(current))
302                         flush_signals(current);
303
304                 del_timer_sync(&tgt->upld_timer);
305
306         } else
307                 printk(KERN_ERR PFX "ERROR!! DISABLE req timed out, destroy"
308                                 " not sent to FW\n");
309
310         /* Free session resources */
311         bnx2fc_free_session_resc(hba, tgt);
312         bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
313 }
314
315 static int bnx2fc_init_tgt(struct bnx2fc_rport *tgt,
316                            struct fcoe_port *port,
317                            struct fc_rport_priv *rdata)
318 {
319
320         struct fc_rport *rport = rdata->rport;
321         struct bnx2fc_interface *interface = port->priv;
322         struct bnx2fc_hba *hba = interface->hba;
323         struct b577xx_doorbell_set_prod *sq_db = &tgt->sq_db;
324         struct b577xx_fcoe_rx_doorbell *rx_db = &tgt->rx_db;
325
326         tgt->rport = rport;
327         tgt->rdata = rdata;
328         tgt->port = port;
329
330         if (hba->num_ofld_sess >= BNX2FC_NUM_MAX_SESS) {
331                 BNX2FC_TGT_DBG(tgt, "exceeded max sessions. logoff this tgt\n");
332                 tgt->fcoe_conn_id = -1;
333                 return -1;
334         }
335
336         tgt->fcoe_conn_id = bnx2fc_alloc_conn_id(hba, tgt);
337         if (tgt->fcoe_conn_id == -1)
338                 return -1;
339
340         BNX2FC_TGT_DBG(tgt, "init_tgt - conn_id = 0x%x\n", tgt->fcoe_conn_id);
341
342         tgt->max_sqes = BNX2FC_SQ_WQES_MAX;
343         tgt->max_rqes = BNX2FC_RQ_WQES_MAX;
344         tgt->max_cqes = BNX2FC_CQ_WQES_MAX;
345         atomic_set(&tgt->free_sqes, BNX2FC_SQ_WQES_MAX);
346
347         /* Initialize the toggle bit */
348         tgt->sq_curr_toggle_bit = 1;
349         tgt->cq_curr_toggle_bit = 1;
350         tgt->sq_prod_idx = 0;
351         tgt->cq_cons_idx = 0;
352         tgt->rq_prod_idx = 0x8000;
353         tgt->rq_cons_idx = 0;
354         atomic_set(&tgt->num_active_ios, 0);
355
356         if (rdata->flags & FC_RP_FLAGS_RETRY) {
357                 tgt->dev_type = TYPE_TAPE;
358                 tgt->io_timeout = 0; /* use default ULP timeout */
359         } else {
360                 tgt->dev_type = TYPE_DISK;
361                 tgt->io_timeout = BNX2FC_IO_TIMEOUT;
362         }
363
364         /* initialize sq doorbell */
365         sq_db->header.header = B577XX_DOORBELL_HDR_DB_TYPE;
366         sq_db->header.header |= B577XX_FCOE_CONNECTION_TYPE <<
367                                         B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT;
368         /* initialize rx doorbell */
369         rx_db->hdr.header = ((0x1 << B577XX_DOORBELL_HDR_RX_SHIFT) |
370                           (0x1 << B577XX_DOORBELL_HDR_DB_TYPE_SHIFT) |
371                           (B577XX_FCOE_CONNECTION_TYPE <<
372                                 B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT));
373         rx_db->params = (0x2 << B577XX_FCOE_RX_DOORBELL_NEGATIVE_ARM_SHIFT) |
374                      (0x3 << B577XX_FCOE_RX_DOORBELL_OPCODE_SHIFT);
375
376         spin_lock_init(&tgt->tgt_lock);
377         spin_lock_init(&tgt->cq_lock);
378
379         /* Initialize active_cmd_queue list */
380         INIT_LIST_HEAD(&tgt->active_cmd_queue);
381
382         /* Initialize IO retire queue */
383         INIT_LIST_HEAD(&tgt->io_retire_queue);
384
385         INIT_LIST_HEAD(&tgt->els_queue);
386
387         /* Initialize active_tm_queue list */
388         INIT_LIST_HEAD(&tgt->active_tm_queue);
389
390         init_waitqueue_head(&tgt->ofld_wait);
391         init_waitqueue_head(&tgt->upld_wait);
392
393         return 0;
394 }
395
396 /**
397  * This event_callback is called after successful completion of libfc
398  * initiated target login. bnx2fc can proceed with initiating the session
399  * establishment.
400  */
401 void bnx2fc_rport_event_handler(struct fc_lport *lport,
402                                 struct fc_rport_priv *rdata,
403                                 enum fc_rport_event event)
404 {
405         struct fcoe_port *port = lport_priv(lport);
406         struct bnx2fc_interface *interface = port->priv;
407         struct bnx2fc_hba *hba = interface->hba;
408         struct fc_rport *rport = rdata->rport;
409         struct fc_rport_libfc_priv *rp;
410         struct bnx2fc_rport *tgt;
411         u32 port_id;
412
413         BNX2FC_HBA_DBG(lport, "rport_event_hdlr: event = %d, port_id = 0x%x\n",
414                 event, rdata->ids.port_id);
415         switch (event) {
416         case RPORT_EV_READY:
417                 if (!rport) {
418                         printk(KERN_ERR PFX "rport is NULL: ERROR!\n");
419                         break;
420                 }
421
422                 rp = rport->dd_data;
423                 if (rport->port_id == FC_FID_DIR_SERV) {
424                         /*
425                          * bnx2fc_rport structure doesn't exist for
426                          * directory server.
427                          * We should not come here, as lport will
428                          * take care of fabric login
429                          */
430                         printk(KERN_ERR PFX "%x - rport_event_handler ERROR\n",
431                                 rdata->ids.port_id);
432                         break;
433                 }
434
435                 if (rdata->spp_type != FC_TYPE_FCP) {
436                         BNX2FC_HBA_DBG(lport, "not FCP type target."
437                                    " not offloading\n");
438                         break;
439                 }
440                 if (!(rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET)) {
441                         BNX2FC_HBA_DBG(lport, "not FCP_TARGET"
442                                    " not offloading\n");
443                         break;
444                 }
445
446                 /*
447                  * Offlaod process is protected with hba mutex.
448                  * Use the same mutex_lock for upload process too
449                  */
450                 mutex_lock(&hba->hba_mutex);
451                 tgt = (struct bnx2fc_rport *)&rp[1];
452
453                 /* This can happen when ADISC finds the same target */
454                 if (test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags)) {
455                         BNX2FC_TGT_DBG(tgt, "already offloaded\n");
456                         mutex_unlock(&hba->hba_mutex);
457                         return;
458                 }
459
460                 /*
461                  * Offload the session. This is a blocking call, and will
462                  * wait until the session is offloaded.
463                  */
464                 bnx2fc_offload_session(port, tgt, rdata);
465
466                 BNX2FC_TGT_DBG(tgt, "OFFLOAD num_ofld_sess = %d\n",
467                         hba->num_ofld_sess);
468
469                 if (test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags)) {
470                         /*
471                          * Session is offloaded and enabled. Map
472                          * doorbell register for this target
473                          */
474                         BNX2FC_TGT_DBG(tgt, "sess offloaded\n");
475                         /* This counter is protected with hba mutex */
476                         hba->num_ofld_sess++;
477
478                         set_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags);
479                 } else {
480                         /*
481                          * Offload or enable would have failed.
482                          * In offload/enable completion path, the
483                          * rport would have already been removed
484                          */
485                         BNX2FC_TGT_DBG(tgt, "Port is being logged off as "
486                                    "offloaded flag not set\n");
487                 }
488                 mutex_unlock(&hba->hba_mutex);
489                 break;
490         case RPORT_EV_LOGO:
491         case RPORT_EV_FAILED:
492         case RPORT_EV_STOP:
493                 port_id = rdata->ids.port_id;
494                 if (port_id == FC_FID_DIR_SERV)
495                         break;
496
497                 if (!rport) {
498                         printk(KERN_INFO PFX "%x - rport not created Yet!!\n",
499                                 port_id);
500                         break;
501                 }
502                 rp = rport->dd_data;
503                 mutex_lock(&hba->hba_mutex);
504                 /*
505                  * Perform session upload. Note that rdata->peers is already
506                  * removed from disc->rports list before we get this event.
507                  */
508                 tgt = (struct bnx2fc_rport *)&rp[1];
509
510                 if (!(test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags))) {
511                         mutex_unlock(&hba->hba_mutex);
512                         break;
513                 }
514                 clear_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags);
515
516                 bnx2fc_upload_session(port, tgt);
517                 hba->num_ofld_sess--;
518                 BNX2FC_TGT_DBG(tgt, "UPLOAD num_ofld_sess = %d\n",
519                         hba->num_ofld_sess);
520                 /*
521                  * Try to wake up the linkdown wait thread. If num_ofld_sess
522                  * is 0, the waiting therad wakes up
523                  */
524                 if ((hba->wait_for_link_down) &&
525                     (hba->num_ofld_sess == 0)) {
526                         wake_up_interruptible(&hba->shutdown_wait);
527                 }
528                 if (test_bit(BNX2FC_FLAG_EXPL_LOGO, &tgt->flags)) {
529                         printk(KERN_ERR PFX "Relogin to the tgt\n");
530                         mutex_lock(&lport->disc.disc_mutex);
531                         lport->tt.rport_login(rdata);
532                         mutex_unlock(&lport->disc.disc_mutex);
533                 }
534                 mutex_unlock(&hba->hba_mutex);
535
536                 break;
537
538         case RPORT_EV_NONE:
539                 break;
540         }
541 }
542
543 /**
544  * bnx2fc_tgt_lookup() - Lookup a bnx2fc_rport by port_id
545  *
546  * @port:  fcoe_port struct to lookup the target port on
547  * @port_id: The remote port ID to look up
548  */
549 struct bnx2fc_rport *bnx2fc_tgt_lookup(struct fcoe_port *port,
550                                              u32 port_id)
551 {
552         struct bnx2fc_interface *interface = port->priv;
553         struct bnx2fc_hba *hba = interface->hba;
554         struct bnx2fc_rport *tgt;
555         struct fc_rport_priv *rdata;
556         int i;
557
558         for (i = 0; i < BNX2FC_NUM_MAX_SESS; i++) {
559                 tgt = hba->tgt_ofld_list[i];
560                 if ((tgt) && (tgt->port == port)) {
561                         rdata = tgt->rdata;
562                         if (rdata->ids.port_id == port_id) {
563                                 if (rdata->rp_state != RPORT_ST_DELETE) {
564                                         BNX2FC_TGT_DBG(tgt, "rport "
565                                                 "obtained\n");
566                                         return tgt;
567                                 } else {
568                                         BNX2FC_TGT_DBG(tgt, "rport 0x%x "
569                                                 "is in DELETED state\n",
570                                                 rdata->ids.port_id);
571                                         return NULL;
572                                 }
573                         }
574                 }
575         }
576         return NULL;
577 }
578
579
580 /**
581  * bnx2fc_alloc_conn_id - allocates FCOE Connection id
582  *
583  * @hba:        pointer to adapter structure
584  * @tgt:        pointer to bnx2fc_rport structure
585  */
586 static u32 bnx2fc_alloc_conn_id(struct bnx2fc_hba *hba,
587                                 struct bnx2fc_rport *tgt)
588 {
589         u32 conn_id, next;
590
591         /* called with hba mutex held */
592
593         /*
594          * tgt_ofld_list access is synchronized using
595          * both hba mutex and hba lock. Atleast hba mutex or
596          * hba lock needs to be held for read access.
597          */
598
599         spin_lock_bh(&hba->hba_lock);
600         next = hba->next_conn_id;
601         conn_id = hba->next_conn_id++;
602         if (hba->next_conn_id == BNX2FC_NUM_MAX_SESS)
603                 hba->next_conn_id = 0;
604
605         while (hba->tgt_ofld_list[conn_id] != NULL) {
606                 conn_id++;
607                 if (conn_id == BNX2FC_NUM_MAX_SESS)
608                         conn_id = 0;
609
610                 if (conn_id == next) {
611                         /* No free conn_ids are available */
612                         spin_unlock_bh(&hba->hba_lock);
613                         return -1;
614                 }
615         }
616         hba->tgt_ofld_list[conn_id] = tgt;
617         tgt->fcoe_conn_id = conn_id;
618         spin_unlock_bh(&hba->hba_lock);
619         return conn_id;
620 }
621
622 static void bnx2fc_free_conn_id(struct bnx2fc_hba *hba, u32 conn_id)
623 {
624         /* called with hba mutex held */
625         spin_lock_bh(&hba->hba_lock);
626         hba->tgt_ofld_list[conn_id] = NULL;
627         hba->next_conn_id = conn_id;
628         spin_unlock_bh(&hba->hba_lock);
629 }
630
631 /**
632  *bnx2fc_alloc_session_resc - Allocate qp resources for the session
633  *
634  */
635 static int bnx2fc_alloc_session_resc(struct bnx2fc_hba *hba,
636                                         struct bnx2fc_rport *tgt)
637 {
638         dma_addr_t page;
639         int num_pages;
640         u32 *pbl;
641
642         /* Allocate and map SQ */
643         tgt->sq_mem_size = tgt->max_sqes * BNX2FC_SQ_WQE_SIZE;
644         tgt->sq_mem_size = (tgt->sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
645
646         tgt->sq = dma_alloc_coherent(&hba->pcidev->dev, tgt->sq_mem_size,
647                                      &tgt->sq_dma, GFP_KERNEL);
648         if (!tgt->sq) {
649                 printk(KERN_ERR PFX "unable to allocate SQ memory %d\n",
650                         tgt->sq_mem_size);
651                 goto mem_alloc_failure;
652         }
653         memset(tgt->sq, 0, tgt->sq_mem_size);
654
655         /* Allocate and map CQ */
656         tgt->cq_mem_size = tgt->max_cqes * BNX2FC_CQ_WQE_SIZE;
657         tgt->cq_mem_size = (tgt->cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
658
659         tgt->cq = dma_alloc_coherent(&hba->pcidev->dev, tgt->cq_mem_size,
660                                      &tgt->cq_dma, GFP_KERNEL);
661         if (!tgt->cq) {
662                 printk(KERN_ERR PFX "unable to allocate CQ memory %d\n",
663                         tgt->cq_mem_size);
664                 goto mem_alloc_failure;
665         }
666         memset(tgt->cq, 0, tgt->cq_mem_size);
667
668         /* Allocate and map RQ and RQ PBL */
669         tgt->rq_mem_size = tgt->max_rqes * BNX2FC_RQ_WQE_SIZE;
670         tgt->rq_mem_size = (tgt->rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
671
672         tgt->rq = dma_alloc_coherent(&hba->pcidev->dev, tgt->rq_mem_size,
673                                         &tgt->rq_dma, GFP_KERNEL);
674         if (!tgt->rq) {
675                 printk(KERN_ERR PFX "unable to allocate RQ memory %d\n",
676                         tgt->rq_mem_size);
677                 goto mem_alloc_failure;
678         }
679         memset(tgt->rq, 0, tgt->rq_mem_size);
680
681         tgt->rq_pbl_size = (tgt->rq_mem_size / PAGE_SIZE) * sizeof(void *);
682         tgt->rq_pbl_size = (tgt->rq_pbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
683
684         tgt->rq_pbl = dma_alloc_coherent(&hba->pcidev->dev, tgt->rq_pbl_size,
685                                          &tgt->rq_pbl_dma, GFP_KERNEL);
686         if (!tgt->rq_pbl) {
687                 printk(KERN_ERR PFX "unable to allocate RQ PBL %d\n",
688                         tgt->rq_pbl_size);
689                 goto mem_alloc_failure;
690         }
691
692         memset(tgt->rq_pbl, 0, tgt->rq_pbl_size);
693         num_pages = tgt->rq_mem_size / PAGE_SIZE;
694         page = tgt->rq_dma;
695         pbl = (u32 *)tgt->rq_pbl;
696
697         while (num_pages--) {
698                 *pbl = (u32)page;
699                 pbl++;
700                 *pbl = (u32)((u64)page >> 32);
701                 pbl++;
702                 page += PAGE_SIZE;
703         }
704
705         /* Allocate and map XFERQ */
706         tgt->xferq_mem_size = tgt->max_sqes * BNX2FC_XFERQ_WQE_SIZE;
707         tgt->xferq_mem_size = (tgt->xferq_mem_size + (PAGE_SIZE - 1)) &
708                                PAGE_MASK;
709
710         tgt->xferq = dma_alloc_coherent(&hba->pcidev->dev, tgt->xferq_mem_size,
711                                         &tgt->xferq_dma, GFP_KERNEL);
712         if (!tgt->xferq) {
713                 printk(KERN_ERR PFX "unable to allocate XFERQ %d\n",
714                         tgt->xferq_mem_size);
715                 goto mem_alloc_failure;
716         }
717         memset(tgt->xferq, 0, tgt->xferq_mem_size);
718
719         /* Allocate and map CONFQ & CONFQ PBL */
720         tgt->confq_mem_size = tgt->max_sqes * BNX2FC_CONFQ_WQE_SIZE;
721         tgt->confq_mem_size = (tgt->confq_mem_size + (PAGE_SIZE - 1)) &
722                                PAGE_MASK;
723
724         tgt->confq = dma_alloc_coherent(&hba->pcidev->dev, tgt->confq_mem_size,
725                                         &tgt->confq_dma, GFP_KERNEL);
726         if (!tgt->confq) {
727                 printk(KERN_ERR PFX "unable to allocate CONFQ %d\n",
728                         tgt->confq_mem_size);
729                 goto mem_alloc_failure;
730         }
731         memset(tgt->confq, 0, tgt->confq_mem_size);
732
733         tgt->confq_pbl_size =
734                 (tgt->confq_mem_size / PAGE_SIZE) * sizeof(void *);
735         tgt->confq_pbl_size =
736                 (tgt->confq_pbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
737
738         tgt->confq_pbl = dma_alloc_coherent(&hba->pcidev->dev,
739                                             tgt->confq_pbl_size,
740                                             &tgt->confq_pbl_dma, GFP_KERNEL);
741         if (!tgt->confq_pbl) {
742                 printk(KERN_ERR PFX "unable to allocate CONFQ PBL %d\n",
743                         tgt->confq_pbl_size);
744                 goto mem_alloc_failure;
745         }
746
747         memset(tgt->confq_pbl, 0, tgt->confq_pbl_size);
748         num_pages = tgt->confq_mem_size / PAGE_SIZE;
749         page = tgt->confq_dma;
750         pbl = (u32 *)tgt->confq_pbl;
751
752         while (num_pages--) {
753                 *pbl = (u32)page;
754                 pbl++;
755                 *pbl = (u32)((u64)page >> 32);
756                 pbl++;
757                 page += PAGE_SIZE;
758         }
759
760         /* Allocate and map ConnDB */
761         tgt->conn_db_mem_size = sizeof(struct fcoe_conn_db);
762
763         tgt->conn_db = dma_alloc_coherent(&hba->pcidev->dev,
764                                           tgt->conn_db_mem_size,
765                                           &tgt->conn_db_dma, GFP_KERNEL);
766         if (!tgt->conn_db) {
767                 printk(KERN_ERR PFX "unable to allocate conn_db %d\n",
768                                                 tgt->conn_db_mem_size);
769                 goto mem_alloc_failure;
770         }
771         memset(tgt->conn_db, 0, tgt->conn_db_mem_size);
772
773
774         /* Allocate and map LCQ */
775         tgt->lcq_mem_size = (tgt->max_sqes + 8) * BNX2FC_SQ_WQE_SIZE;
776         tgt->lcq_mem_size = (tgt->lcq_mem_size + (PAGE_SIZE - 1)) &
777                              PAGE_MASK;
778
779         tgt->lcq = dma_alloc_coherent(&hba->pcidev->dev, tgt->lcq_mem_size,
780                                       &tgt->lcq_dma, GFP_KERNEL);
781
782         if (!tgt->lcq) {
783                 printk(KERN_ERR PFX "unable to allocate lcq %d\n",
784                        tgt->lcq_mem_size);
785                 goto mem_alloc_failure;
786         }
787         memset(tgt->lcq, 0, tgt->lcq_mem_size);
788
789         tgt->conn_db->rq_prod = 0x8000;
790
791         return 0;
792
793 mem_alloc_failure:
794         bnx2fc_free_session_resc(hba, tgt);
795         bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
796         return -ENOMEM;
797 }
798
799 /**
800  * bnx2i_free_session_resc - free qp resources for the session
801  *
802  * @hba:        adapter structure pointer
803  * @tgt:        bnx2fc_rport structure pointer
804  *
805  * Free QP resources - SQ/RQ/CQ/XFERQ memory and PBL
806  */
807 static void bnx2fc_free_session_resc(struct bnx2fc_hba *hba,
808                                                 struct bnx2fc_rport *tgt)
809 {
810         BNX2FC_TGT_DBG(tgt, "Freeing up session resources\n");
811
812         if (tgt->ctx_base) {
813                 iounmap(tgt->ctx_base);
814                 tgt->ctx_base = NULL;
815         }
816
817         spin_lock_bh(&tgt->cq_lock);
818         /* Free LCQ */
819         if (tgt->lcq) {
820                 dma_free_coherent(&hba->pcidev->dev, tgt->lcq_mem_size,
821                                     tgt->lcq, tgt->lcq_dma);
822                 tgt->lcq = NULL;
823         }
824         /* Free connDB */
825         if (tgt->conn_db) {
826                 dma_free_coherent(&hba->pcidev->dev, tgt->conn_db_mem_size,
827                                     tgt->conn_db, tgt->conn_db_dma);
828                 tgt->conn_db = NULL;
829         }
830         /* Free confq  and confq pbl */
831         if (tgt->confq_pbl) {
832                 dma_free_coherent(&hba->pcidev->dev, tgt->confq_pbl_size,
833                                     tgt->confq_pbl, tgt->confq_pbl_dma);
834                 tgt->confq_pbl = NULL;
835         }
836         if (tgt->confq) {
837                 dma_free_coherent(&hba->pcidev->dev, tgt->confq_mem_size,
838                                     tgt->confq, tgt->confq_dma);
839                 tgt->confq = NULL;
840         }
841         /* Free XFERQ */
842         if (tgt->xferq) {
843                 dma_free_coherent(&hba->pcidev->dev, tgt->xferq_mem_size,
844                                     tgt->xferq, tgt->xferq_dma);
845                 tgt->xferq = NULL;
846         }
847         /* Free RQ PBL and RQ */
848         if (tgt->rq_pbl) {
849                 dma_free_coherent(&hba->pcidev->dev, tgt->rq_pbl_size,
850                                     tgt->rq_pbl, tgt->rq_pbl_dma);
851                 tgt->rq_pbl = NULL;
852         }
853         if (tgt->rq) {
854                 dma_free_coherent(&hba->pcidev->dev, tgt->rq_mem_size,
855                                     tgt->rq, tgt->rq_dma);
856                 tgt->rq = NULL;
857         }
858         /* Free CQ */
859         if (tgt->cq) {
860                 dma_free_coherent(&hba->pcidev->dev, tgt->cq_mem_size,
861                                     tgt->cq, tgt->cq_dma);
862                 tgt->cq = NULL;
863         }
864         /* Free SQ */
865         if (tgt->sq) {
866                 dma_free_coherent(&hba->pcidev->dev, tgt->sq_mem_size,
867                                     tgt->sq, tgt->sq_dma);
868                 tgt->sq = NULL;
869         }
870         spin_unlock_bh(&tgt->cq_lock);
871 }