drivers/scsi/fnic/fnic_fcs.c

   1 /*
   2  * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * This program is free software; you may redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  10  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  11  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  12  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  13  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  14  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  15  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  16  * SOFTWARE.
  17  */
  18 #include <linux/errno.h>
  19 #include <linux/pci.h>
  20 #include <linux/slab.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/spinlock.h>
  24 #include <linux/if_ether.h>
  25 #include <linux/if_vlan.h>
  26 #include <linux/workqueue.h>
  27 #include <scsi/fc/fc_fip.h>
  28 #include <scsi/fc/fc_els.h>
  29 #include <scsi/fc/fc_fcoe.h>
  30 #include <scsi/fc_frame.h>
  31 #include <scsi/libfc.h>
  32 #include "fnic_io.h"
  33 #include "fnic.h"
  34 #include "fnic_fip.h"
  35 #include "cq_enet_desc.h"
  36 #include "cq_exch_desc.h"
  37
  38 static u8 fcoe_all_fcfs[ETH_ALEN];
  39 struct workqueue_struct *fnic_fip_queue;
  40 struct workqueue_struct *fnic_event_queue;
  41
  42 static void fnic_set_eth_mode(struct fnic *);
  43 static void fnic_fcoe_send_vlan_req(struct fnic *fnic);
  44 static void fnic_fcoe_start_fcf_disc(struct fnic *fnic);
  45 static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *);
  46 static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag);
  47 static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb);
  48
  49 void fnic_handle_link(struct work_struct *work)
  50 {
  51         struct fnic *fnic = container_of(work, struct fnic, link_work);
  52         unsigned long flags;
  53         int old_link_status;
  54         u32 old_link_down_cnt;
  55
  56         spin_lock_irqsave(&fnic->fnic_lock, flags);
  57
  58         if (fnic->stop_rx_link_events) {
  59                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
  60                 return;
  61         }
  62
  63         old_link_down_cnt = fnic->link_down_cnt;
  64         old_link_status = fnic->link_status;
  65         fnic->link_status = vnic_dev_link_status(fnic->vdev);
  66         fnic->link_down_cnt = vnic_dev_link_down_cnt(fnic->vdev);
  67
  68         if (old_link_status == fnic->link_status) {
  69                 if (!fnic->link_status)
  70                         /* DOWN -> DOWN */
  71                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
  72                 else {
  73                         if (old_link_down_cnt != fnic->link_down_cnt) {
  74                                 /* UP -> DOWN -> UP */
  75                                 fnic->lport->host_stats.link_failure_count++;
  76                                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
  77                                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
  78                                              "link down\n");
  79                                 fcoe_ctlr_link_down(&fnic->ctlr);
  80                                 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
  81                                         /* start FCoE VLAN discovery */
  82                                         fnic_fcoe_send_vlan_req(fnic);
  83                                         return;
  84                                 }
  85                                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
  86                                              "link up\n");
  87                                 fcoe_ctlr_link_up(&fnic->ctlr);
  88                         } else
  89                                 /* UP -> UP */
  90                                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
  91                 }
  92         } else if (fnic->link_status) {
  93                 /* DOWN -> UP */
  94                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
  95                 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
  96                         /* start FCoE VLAN discovery */
  97                         fnic_fcoe_send_vlan_req(fnic);
  98                         return;
  99                 }
 100                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n");
 101                 fcoe_ctlr_link_up(&fnic->ctlr);
 102         } else {
 103                 /* UP -> DOWN */
 104                 fnic->lport->host_stats.link_failure_count++;
 105                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 106                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link down\n");
 107                 fcoe_ctlr_link_down(&fnic->ctlr);
 108         }
 109
 110 }
 111
 112 /*
 113  * This function passes incoming fabric frames to libFC
 114  */
 115 void fnic_handle_frame(struct work_struct *work)
 116 {
 117         struct fnic *fnic = container_of(work, struct fnic, frame_work);
 118         struct fc_lport *lp = fnic->lport;
 119         unsigned long flags;
 120         struct sk_buff *skb;
 121         struct fc_frame *fp;
 122
 123         while ((skb = skb_dequeue(&fnic->frame_queue))) {
 124
 125                 spin_lock_irqsave(&fnic->fnic_lock, flags);
 126                 if (fnic->stop_rx_link_events) {
 127                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 128                         dev_kfree_skb(skb);
 129                         return;
 130                 }
 131                 fp = (struct fc_frame *)skb;
 132
 133                 /*
 134                  * If we're in a transitional state, just re-queue and return.
 135                  * The queue will be serviced when we get to a stable state.
 136                  */
 137                 if (fnic->state != FNIC_IN_FC_MODE &&
 138                     fnic->state != FNIC_IN_ETH_MODE) {
 139                         skb_queue_head(&fnic->frame_queue, skb);
 140                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 141                         return;
 142                 }
 143                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 144
 145                 fc_exch_recv(lp, fp);
 146         }
 147 }
 148
 149 void fnic_fcoe_evlist_free(struct fnic *fnic)
 150 {
 151         struct fnic_event *fevt = NULL;
 152         struct fnic_event *next = NULL;
 153         unsigned long flags;
 154
 155         spin_lock_irqsave(&fnic->fnic_lock, flags);
 156         if (list_empty(&fnic->evlist)) {
 157                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 158                 return;
 159         }
 160
 161         list_for_each_entry_safe(fevt, next, &fnic->evlist, list) {
 162                 list_del(&fevt->list);
 163                 kfree(fevt);
 164         }
 165         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 166 }
 167
 168 void fnic_handle_event(struct work_struct *work)
 169 {
 170         struct fnic *fnic = container_of(work, struct fnic, event_work);
 171         struct fnic_event *fevt = NULL;
 172         struct fnic_event *next = NULL;
 173         unsigned long flags;
 174
 175         spin_lock_irqsave(&fnic->fnic_lock, flags);
 176         if (list_empty(&fnic->evlist)) {
 177                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 178                 return;
 179         }
 180
 181         list_for_each_entry_safe(fevt, next, &fnic->evlist, list) {
 182                 if (fnic->stop_rx_link_events) {
 183                         list_del(&fevt->list);
 184                         kfree(fevt);
 185                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 186                         return;
 187                 }
 188                 /*
 189                  * If we're in a transitional state, just re-queue and return.
 190                  * The queue will be serviced when we get to a stable state.
 191                  */
 192                 if (fnic->state != FNIC_IN_FC_MODE &&
 193                     fnic->state != FNIC_IN_ETH_MODE) {
 194                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 195                         return;
 196                 }
 197
 198                 list_del(&fevt->list);
 199                 switch (fevt->event) {
 200                 case FNIC_EVT_START_VLAN_DISC:
 201                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 202                         fnic_fcoe_send_vlan_req(fnic);
 203                         spin_lock_irqsave(&fnic->fnic_lock, flags);
 204                         break;
 205                 case FNIC_EVT_START_FCF_DISC:
 206                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 207                                   "Start FCF Discovery\n");
 208                         fnic_fcoe_start_fcf_disc(fnic);
 209                         break;
 210                 default:
 211                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 212                                   "Unknown event 0x%x\n", fevt->event);
 213                         break;
 214                 }
 215                 kfree(fevt);
 216         }
 217         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 218 }
 219
 220 /**
 221  * Check if the Received FIP FLOGI frame is rejected
 222  * @fip: The FCoE controller that received the frame
 223  * @skb: The received FIP frame
 224  *
 225  * Returns non-zero if the frame is rejected with unsupported cmd with
 226  * insufficient resource els explanation.
 227  */
 228 static inline int is_fnic_fip_flogi_reject(struct fcoe_ctlr *fip,
 229                                          struct sk_buff *skb)
 230 {
 231         struct fc_lport *lport = fip->lp;
 232         struct fip_header *fiph;
 233         struct fc_frame_header *fh = NULL;
 234         struct fip_desc *desc;
 235         struct fip_encaps *els;
 236         enum fip_desc_type els_dtype = 0;
 237         u16 op;
 238         u8 els_op;
 239         u8 sub;
 240
 241         size_t els_len = 0;
 242         size_t rlen;
 243         size_t dlen = 0;
 244
 245         if (skb_linearize(skb))
 246                 return 0;
 247
 248         if (skb->len < sizeof(*fiph))
 249                 return 0;
 250
 251         fiph = (struct fip_header *)skb->data;
 252         op = ntohs(fiph->fip_op);
 253         sub = fiph->fip_subcode;
 254
 255         if (op != FIP_OP_LS)
 256                 return 0;
 257
 258         if (sub != FIP_SC_REP)
 259                 return 0;
 260
 261         rlen = ntohs(fiph->fip_dl_len) * 4;
 262         if (rlen + sizeof(*fiph) > skb->len)
 263                 return 0;
 264
 265         desc = (struct fip_desc *)(fiph + 1);
 266         dlen = desc->fip_dlen * FIP_BPW;
 267
 268         if (desc->fip_dtype == FIP_DT_FLOGI) {
 269
 270                 shost_printk(KERN_DEBUG, lport->host,
 271                           " FIP TYPE FLOGI: fab name:%llx "
 272                           "vfid:%d map:%x\n",
 273                           fip->sel_fcf->fabric_name, fip->sel_fcf->vfid,
 274                           fip->sel_fcf->fc_map);
 275                 if (dlen < sizeof(*els) + sizeof(*fh) + 1)
 276                         return 0;
 277
 278                 els_len = dlen - sizeof(*els);
 279                 els = (struct fip_encaps *)desc;
 280                 fh = (struct fc_frame_header *)(els + 1);
 281                 els_dtype = desc->fip_dtype;
 282
 283                 if (!fh)
 284                         return 0;
 285
 286                 /*
 287                  * ELS command code, reason and explanation should be = Reject,
 288                  * unsupported command and insufficient resource
 289                  */
 290                 els_op = *(u8 *)(fh + 1);
 291                 if (els_op == ELS_LS_RJT) {
 292                         shost_printk(KERN_INFO, lport->host,
 293                                   "Flogi Request Rejected by Switch\n");
 294                         return 1;
 295                 }
 296                 shost_printk(KERN_INFO, lport->host,
 297                                 "Flogi Request Accepted by Switch\n");
 298         }
 299         return 0;
 300 }
 301
 302 static void fnic_fcoe_send_vlan_req(struct fnic *fnic)
 303 {
 304         struct fcoe_ctlr *fip = &fnic->ctlr;
 305         struct sk_buff *skb;
 306         char *eth_fr;
 307         int fr_len;
 308         struct fip_vlan *vlan;
 309         u64 vlan_tov;
 310
 311         fnic_fcoe_reset_vlans(fnic);
 312         fnic->set_vlan(fnic, 0);
 313         FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 314                   "Sending VLAN request...\n");
 315         skb = dev_alloc_skb(sizeof(struct fip_vlan));
 316         if (!skb)
 317                 return;
 318
 319         fr_len = sizeof(*vlan);
 320         eth_fr = (char *)skb->data;
 321         vlan = (struct fip_vlan *)eth_fr;
 322
 323         memset(vlan, 0, sizeof(*vlan));
 324         memcpy(vlan->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
 325         memcpy(vlan->eth.h_dest, fcoe_all_fcfs, ETH_ALEN);
 326         vlan->eth.h_proto = htons(ETH_P_FIP);
 327
 328         vlan->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
 329         vlan->fip.fip_op = htons(FIP_OP_VLAN);
 330         vlan->fip.fip_subcode = FIP_SC_VL_REQ;
 331         vlan->fip.fip_dl_len = htons(sizeof(vlan->desc) / FIP_BPW);
 332
 333         vlan->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
 334         vlan->desc.mac.fd_desc.fip_dlen = sizeof(vlan->desc.mac) / FIP_BPW;
 335         memcpy(&vlan->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
 336
 337         vlan->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
 338         vlan->desc.wwnn.fd_desc.fip_dlen = sizeof(vlan->desc.wwnn) / FIP_BPW;
 339         put_unaligned_be64(fip->lp->wwnn, &vlan->desc.wwnn.fd_wwn);
 340
 341         skb_put(skb, sizeof(*vlan));
 342         skb->protocol = htons(ETH_P_FIP);
 343         skb_reset_mac_header(skb);
 344         skb_reset_network_header(skb);
 345         fip->send(fip, skb);
 346
 347         /* set a timer so that we can retry if there no response */
 348         vlan_tov = jiffies + msecs_to_jiffies(FCOE_CTLR_FIPVLAN_TOV);
 349         mod_timer(&fnic->fip_timer, round_jiffies(vlan_tov));
 350 }
 351
 352 static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *skb)
 353 {
 354         struct fcoe_ctlr *fip = &fnic->ctlr;
 355         struct fip_header *fiph;
 356         struct fip_desc *desc;
 357         u16 vid;
 358         size_t rlen;
 359         size_t dlen;
 360         struct fcoe_vlan *vlan;
 361         u64 sol_time;
 362         unsigned long flags;
 363
 364         FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 365                   "Received VLAN response...\n");
 366
 367         fiph = (struct fip_header *) skb->data;
 368
 369         FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 370                   "Received VLAN response... OP 0x%x SUB_OP 0x%x\n",
 371                   ntohs(fiph->fip_op), fiph->fip_subcode);
 372
 373         rlen = ntohs(fiph->fip_dl_len) * 4;
 374         fnic_fcoe_reset_vlans(fnic);
 375         spin_lock_irqsave(&fnic->vlans_lock, flags);
 376         desc = (struct fip_desc *)(fiph + 1);
 377         while (rlen > 0) {
 378                 dlen = desc->fip_dlen * FIP_BPW;
 379                 switch (desc->fip_dtype) {
 380                 case FIP_DT_VLAN:
 381                         vid = ntohs(((struct fip_vlan_desc *)desc)->fd_vlan);
 382                         shost_printk(KERN_INFO, fnic->lport->host,
 383                                   "process_vlan_resp: FIP VLAN %d\n", vid);
 384                         vlan = kmalloc(sizeof(*vlan),
 385                                                         GFP_ATOMIC);
 386                         if (!vlan) {
 387                                 /* retry from timer */
 388                                 spin_unlock_irqrestore(&fnic->vlans_lock,
 389                                                         flags);
 390                                 goto out;
 391                         }
 392                         memset(vlan, 0, sizeof(struct fcoe_vlan));
 393                         vlan->vid = vid & 0x0fff;
 394                         vlan->state = FIP_VLAN_AVAIL;
 395                         list_add_tail(&vlan->list, &fnic->vlans);
 396                         break;
 397                 }
 398                 desc = (struct fip_desc *)((char *)desc + dlen);
 399                 rlen -= dlen;
 400         }
 401
 402         /* any VLAN descriptors present ? */
 403         if (list_empty(&fnic->vlans)) {
 404                 /* retry from timer */
 405                 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 406                           "No VLAN descriptors in FIP VLAN response\n");
 407                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 408                 goto out;
 409         }
 410
 411         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
 412         fnic->set_vlan(fnic, vlan->vid);
 413         vlan->state = FIP_VLAN_SENT; /* sent now */
 414         vlan->sol_count++;
 415         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 416
 417         /* start the solicitation */
 418         fcoe_ctlr_link_up(fip);
 419
 420         sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
 421         mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
 422 out:
 423         return;
 424 }
 425
 426 static void fnic_fcoe_start_fcf_disc(struct fnic *fnic)
 427 {
 428         unsigned long flags;
 429         struct fcoe_vlan *vlan;
 430         u64 sol_time;
 431
 432         spin_lock_irqsave(&fnic->vlans_lock, flags);
 433         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
 434         fnic->set_vlan(fnic, vlan->vid);
 435         vlan->state = FIP_VLAN_SENT; /* sent now */
 436         vlan->sol_count = 1;
 437         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 438
 439         /* start the solicitation */
 440         fcoe_ctlr_link_up(&fnic->ctlr);
 441
 442         sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
 443         mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
 444 }
 445
 446 static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag)
 447 {
 448         unsigned long flags;
 449         struct fcoe_vlan *fvlan;
 450
 451         spin_lock_irqsave(&fnic->vlans_lock, flags);
 452         if (list_empty(&fnic->vlans)) {
 453                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 454                 return -EINVAL;
 455         }
 456
 457         fvlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
 458         if (fvlan->state == FIP_VLAN_USED) {
 459                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 460                 return 0;
 461         }
 462
 463         if (fvlan->state == FIP_VLAN_SENT) {
 464                 fvlan->state = FIP_VLAN_USED;
 465                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 466                 return 0;
 467         }
 468         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 469         return -EINVAL;
 470 }
 471
 472 static void fnic_event_enq(struct fnic *fnic, enum fnic_evt ev)
 473 {
 474         struct fnic_event *fevt;
 475         unsigned long flags;
 476
 477         fevt = kmalloc(sizeof(*fevt), GFP_ATOMIC);
 478         if (!fevt)
 479                 return;
 480
 481         fevt->fnic = fnic;
 482         fevt->event = ev;
 483
 484         spin_lock_irqsave(&fnic->fnic_lock, flags);
 485         list_add_tail(&fevt->list, &fnic->evlist);
 486         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 487
 488         schedule_work(&fnic->event_work);
 489 }
 490
 491 static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb)
 492 {
 493         struct fip_header *fiph;
 494         int ret = 1;
 495         u16 op;
 496         u8 sub;
 497
 498         if (!skb || !(skb->data))
 499                 return -1;
 500
 501         if (skb_linearize(skb))
 502                 goto drop;
 503
 504         fiph = (struct fip_header *)skb->data;
 505         op = ntohs(fiph->fip_op);
 506         sub = fiph->fip_subcode;
 507
 508         if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
 509                 goto drop;
 510
 511         if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
 512                 goto drop;
 513
 514         if (op == FIP_OP_DISC && sub == FIP_SC_ADV) {
 515                 if (fnic_fcoe_vlan_check(fnic, ntohs(fiph->fip_flags)))
 516                         goto drop;
 517                 /* pass it on to fcoe */
 518                 ret = 1;
 519         } else if (op == FIP_OP_VLAN && sub == FIP_SC_VL_REP) {
 520                 /* set the vlan as used */
 521                 fnic_fcoe_process_vlan_resp(fnic, skb);
 522                 ret = 0;
 523         } else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) {
 524                 /* received CVL request, restart vlan disc */
 525                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
 526                 /* pass it on to fcoe */
 527                 ret = 1;
 528         }
 529 drop:
 530         return ret;
 531 }
 532
 533 void fnic_handle_fip_frame(struct work_struct *work)
 534 {
 535         struct fnic *fnic = container_of(work, struct fnic, fip_frame_work);
 536         unsigned long flags;
 537         struct sk_buff *skb;
 538         struct ethhdr *eh;
 539
 540         while ((skb = skb_dequeue(&fnic->fip_frame_queue))) {
 541                 spin_lock_irqsave(&fnic->fnic_lock, flags);
 542                 if (fnic->stop_rx_link_events) {
 543                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 544                         dev_kfree_skb(skb);
 545                         return;
 546                 }
 547                 /*
 548                  * If we're in a transitional state, just re-queue and return.
 549                  * The queue will be serviced when we get to a stable state.
 550                  */
 551                 if (fnic->state != FNIC_IN_FC_MODE &&
 552                     fnic->state != FNIC_IN_ETH_MODE) {
 553                         skb_queue_head(&fnic->fip_frame_queue, skb);
 554                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 555                         return;
 556                 }
 557                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 558                 eh = (struct ethhdr *)skb->data;
 559                 if (eh->h_proto == htons(ETH_P_FIP)) {
 560                         skb_pull(skb, sizeof(*eh));
 561                         if (fnic_fcoe_handle_fip_frame(fnic, skb) <= 0) {
 562                                 dev_kfree_skb(skb);
 563                                 continue;
 564                         }
 565                         /*
 566                          * If there's FLOGI rejects - clear all
 567                          * fcf's & restart from scratch
 568                          */
 569                         if (is_fnic_fip_flogi_reject(&fnic->ctlr, skb)) {
 570                                 shost_printk(KERN_INFO, fnic->lport->host,
 571                                           "Trigger a Link down - VLAN Disc\n");
 572                                 fcoe_ctlr_link_down(&fnic->ctlr);
 573                                 /* start FCoE VLAN discovery */
 574                                 fnic_fcoe_send_vlan_req(fnic);
 575                                 dev_kfree_skb(skb);
 576                                 continue;
 577                         }
 578                         fcoe_ctlr_recv(&fnic->ctlr, skb);
 579                         continue;
 580                 }
 581         }
 582 }
 583
 584 /**
 585  * fnic_import_rq_eth_pkt() - handle received FCoE or FIP frame.
 586  * @fnic:       fnic instance.
 587  * @skb:        Ethernet Frame.
 588  */
 589 static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb)
 590 {
 591         struct fc_frame *fp;
 592         struct ethhdr *eh;
 593         struct fcoe_hdr *fcoe_hdr;
 594         struct fcoe_crc_eof *ft;
 595
 596         /*
 597          * Undo VLAN encapsulation if present.
 598          */
 599         eh = (struct ethhdr *)skb->data;
 600         if (eh->h_proto == htons(ETH_P_8021Q)) {
 601                 memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
 602                 eh = (struct ethhdr *)skb_pull(skb, VLAN_HLEN);
 603                 skb_reset_mac_header(skb);
 604         }
 605         if (eh->h_proto == htons(ETH_P_FIP)) {
 606                 if (!(fnic->config.flags & VFCF_FIP_CAPABLE)) {
 607                         printk(KERN_ERR "Dropped FIP frame, as firmware "
 608                                         "uses non-FIP mode, Enable FIP "
 609                                         "using UCSM\n");
 610                         goto drop;
 611                 }
 612                 skb_queue_tail(&fnic->fip_frame_queue, skb);
 613                 queue_work(fnic_fip_queue, &fnic->fip_frame_work);
 614                 return 1;               /* let caller know packet was used */
 615         }
 616         if (eh->h_proto != htons(ETH_P_FCOE))
 617                 goto drop;
 618         skb_set_network_header(skb, sizeof(*eh));
 619         skb_pull(skb, sizeof(*eh));
 620
 621         fcoe_hdr = (struct fcoe_hdr *)skb->data;
 622         if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER)
 623                 goto drop;
 624
 625         fp = (struct fc_frame *)skb;
 626         fc_frame_init(fp);
 627         fr_sof(fp) = fcoe_hdr->fcoe_sof;
 628         skb_pull(skb, sizeof(struct fcoe_hdr));
 629         skb_reset_transport_header(skb);
 630
 631         ft = (struct fcoe_crc_eof *)(skb->data + skb->len - sizeof(*ft));
 632         fr_eof(fp) = ft->fcoe_eof;
 633         skb_trim(skb, skb->len - sizeof(*ft));
 634         return 0;
 635 drop:
 636         dev_kfree_skb_irq(skb);
 637         return -1;
 638 }
 639
 640 /**
 641  * fnic_update_mac_locked() - set data MAC address and filters.
 642  * @fnic:       fnic instance.
 643  * @new:        newly-assigned FCoE MAC address.
 644  *
 645  * Called with the fnic lock held.
 646  */
 647 void fnic_update_mac_locked(struct fnic *fnic, u8 *new)
 648 {
 649         u8 *ctl = fnic->ctlr.ctl_src_addr;
 650         u8 *data = fnic->data_src_addr;
 651
 652         if (is_zero_ether_addr(new))
 653                 new = ctl;
 654         if (!compare_ether_addr(data, new))
 655                 return;
 656         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n", new);
 657         if (!is_zero_ether_addr(data) && compare_ether_addr(data, ctl))
 658                 vnic_dev_del_addr(fnic->vdev, data);
 659         memcpy(data, new, ETH_ALEN);
 660         if (compare_ether_addr(new, ctl))
 661                 vnic_dev_add_addr(fnic->vdev, new);
 662 }
 663
 664 /**
 665  * fnic_update_mac() - set data MAC address and filters.
 666  * @lport:      local port.
 667  * @new:        newly-assigned FCoE MAC address.
 668  */
 669 void fnic_update_mac(struct fc_lport *lport, u8 *new)
 670 {
 671         struct fnic *fnic = lport_priv(lport);
 672
 673         spin_lock_irq(&fnic->fnic_lock);
 674         fnic_update_mac_locked(fnic, new);
 675         spin_unlock_irq(&fnic->fnic_lock);
 676 }
 677
 678 /**
 679  * fnic_set_port_id() - set the port_ID after successful FLOGI.
 680  * @lport:      local port.
 681  * @port_id:    assigned FC_ID.
 682  * @fp:         received frame containing the FLOGI accept or NULL.
 683  *
 684  * This is called from libfc when a new FC_ID has been assigned.
 685  * This causes us to reset the firmware to FC_MODE and setup the new MAC
 686  * address and FC_ID.
 687  *
 688  * It is also called with FC_ID 0 when we're logged off.
 689  *
 690  * If the FC_ID is due to point-to-point, fp may be NULL.
 691  */
 692 void fnic_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp)
 693 {
 694         struct fnic *fnic = lport_priv(lport);
 695         u8 *mac;
 696         int ret;
 697
 698         FNIC_FCS_DBG(KERN_DEBUG, lport->host, "set port_id %x fp %p\n",
 699                      port_id, fp);
 700
 701         /*
 702          * If we're clearing the FC_ID, change to use the ctl_src_addr.
 703          * Set ethernet mode to send FLOGI.
 704          */
 705         if (!port_id) {
 706                 fnic_update_mac(lport, fnic->ctlr.ctl_src_addr);
 707                 fnic_set_eth_mode(fnic);
 708                 return;
 709         }
 710
 711         if (fp) {
 712                 mac = fr_cb(fp)->granted_mac;
 713                 if (is_zero_ether_addr(mac)) {
 714                         /* non-FIP - FLOGI already accepted - ignore return */
 715                         fcoe_ctlr_recv_flogi(&fnic->ctlr, lport, fp);
 716                 }
 717                 fnic_update_mac(lport, mac);
 718         }
 719
 720         /* Change state to reflect transition to FC mode */
 721         spin_lock_irq(&fnic->fnic_lock);
 722         if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE)
 723                 fnic->state = FNIC_IN_ETH_TRANS_FC_MODE;
 724         else {
 725                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 726                              "Unexpected fnic state %s while"
 727                              " processing flogi resp\n",
 728                              fnic_state_to_str(fnic->state));
 729                 spin_unlock_irq(&fnic->fnic_lock);
 730                 return;
 731         }
 732         spin_unlock_irq(&fnic->fnic_lock);
 733
 734         /*
 735          * Send FLOGI registration to firmware to set up FC mode.
 736          * The new address will be set up when registration completes.
 737          */
 738         ret = fnic_flogi_reg_handler(fnic, port_id);
 739
 740         if (ret < 0) {
 741                 spin_lock_irq(&fnic->fnic_lock);
 742                 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE)
 743                         fnic->state = FNIC_IN_ETH_MODE;
 744                 spin_unlock_irq(&fnic->fnic_lock);
 745         }
 746 }
 747
 748 static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc
 749                                     *cq_desc, struct vnic_rq_buf *buf,
 750                                     int skipped __attribute__((unused)),
 751                                     void *opaque)
 752 {
 753         struct fnic *fnic = vnic_dev_priv(rq->vdev);
 754         struct sk_buff *skb;
 755         struct fc_frame *fp;
 756         unsigned int eth_hdrs_stripped;
 757         u8 type, color, eop, sop, ingress_port, vlan_stripped;
 758         u8 fcoe = 0, fcoe_sof, fcoe_eof;
 759         u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0;
 760         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
 761         u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc;
 762         u8 fcs_ok = 1, packet_error = 0;
 763         u16 q_number, completed_index, bytes_written = 0, vlan, checksum;
 764         u32 rss_hash;
 765         u16 exchange_id, tmpl;
 766         u8 sof = 0;
 767         u8 eof = 0;
 768         u32 fcp_bytes_written = 0;
 769         unsigned long flags;
 770
 771         pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
 772                          PCI_DMA_FROMDEVICE);
 773         skb = buf->os_buf;
 774         fp = (struct fc_frame *)skb;
 775         buf->os_buf = NULL;
 776
 777         cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index);
 778         if (type == CQ_DESC_TYPE_RQ_FCP) {
 779                 cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc,
 780                                    &type, &color, &q_number, &completed_index,
 781                                    &eop, &sop, &fcoe_fc_crc_ok, &exchange_id,
 782                                    &tmpl, &fcp_bytes_written, &sof, &eof,
 783                                    &ingress_port, &packet_error,
 784                                    &fcoe_enc_error, &fcs_ok, &vlan_stripped,
 785                                    &vlan);
 786                 eth_hdrs_stripped = 1;
 787                 skb_trim(skb, fcp_bytes_written);
 788                 fr_sof(fp) = sof;
 789                 fr_eof(fp) = eof;
 790
 791         } else if (type == CQ_DESC_TYPE_RQ_ENET) {
 792                 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
 793                                     &type, &color, &q_number, &completed_index,
 794                                     &ingress_port, &fcoe, &eop, &sop,
 795                                     &rss_type, &csum_not_calc, &rss_hash,
 796                                     &bytes_written, &packet_error,
 797                                     &vlan_stripped, &vlan, &checksum,
 798                                     &fcoe_sof, &fcoe_fc_crc_ok,
 799                                     &fcoe_enc_error, &fcoe_eof,
 800                                     &tcp_udp_csum_ok, &udp, &tcp,
 801                                     &ipv4_csum_ok, &ipv6, &ipv4,
 802                                     &ipv4_fragment, &fcs_ok);
 803                 eth_hdrs_stripped = 0;
 804                 skb_trim(skb, bytes_written);
 805                 if (!fcs_ok) {
 806                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 807                                      "fcs error.  dropping packet.\n");
 808                         goto drop;
 809                 }
 810                 if (fnic_import_rq_eth_pkt(fnic, skb))
 811                         return;
 812
 813         } else {
 814                 /* wrong CQ type*/
 815                 shost_printk(KERN_ERR, fnic->lport->host,
 816                              "fnic rq_cmpl wrong cq type x%x\n", type);
 817                 goto drop;
 818         }
 819
 820         if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) {
 821                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 822                              "fnic rq_cmpl fcoe x%x fcsok x%x"
 823                              " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err"
 824                              " x%x\n",
 825                              fcoe, fcs_ok, packet_error,
 826                              fcoe_fc_crc_ok, fcoe_enc_error);
 827                 goto drop;
 828         }
 829
 830         spin_lock_irqsave(&fnic->fnic_lock, flags);
 831         if (fnic->stop_rx_link_events) {
 832                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 833                 goto drop;
 834         }
 835         fr_dev(fp) = fnic->lport;
 836         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 837
 838         skb_queue_tail(&fnic->frame_queue, skb);
 839         queue_work(fnic_event_queue, &fnic->frame_work);
 840
 841         return;
 842 drop:
 843         dev_kfree_skb_irq(skb);
 844 }
 845
 846 static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev,
 847                                      struct cq_desc *cq_desc, u8 type,
 848                                      u16 q_number, u16 completed_index,
 849                                      void *opaque)
 850 {
 851         struct fnic *fnic = vnic_dev_priv(vdev);
 852
 853         vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index,
 854                         VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv,
 855                         NULL);
 856         return 0;
 857 }
 858
 859 int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do)
 860 {
 861         unsigned int tot_rq_work_done = 0, cur_work_done;
 862         unsigned int i;
 863         int err;
 864
 865         for (i = 0; i < fnic->rq_count; i++) {
 866                 cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do,
 867                                                 fnic_rq_cmpl_handler_cont,
 868                                                 NULL);
 869                 if (cur_work_done) {
 870                         err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
 871                         if (err)
 872                                 shost_printk(KERN_ERR, fnic->lport->host,
 873                                              "fnic_alloc_rq_frame can't alloc"
 874                                              " frame\n");
 875                 }
 876                 tot_rq_work_done += cur_work_done;
 877         }
 878
 879         return tot_rq_work_done;
 880 }
 881
 882 /*
 883  * This function is called once at init time to allocate and fill RQ
 884  * buffers. Subsequently, it is called in the interrupt context after RQ
 885  * buffer processing to replenish the buffers in the RQ
 886  */
 887 int fnic_alloc_rq_frame(struct vnic_rq *rq)
 888 {
 889         struct fnic *fnic = vnic_dev_priv(rq->vdev);
 890         struct sk_buff *skb;
 891         u16 len;
 892         dma_addr_t pa;
 893
 894         len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM;
 895         skb = dev_alloc_skb(len);
 896         if (!skb) {
 897                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 898                              "Unable to allocate RQ sk_buff\n");
 899                 return -ENOMEM;
 900         }
 901         skb_reset_mac_header(skb);
 902         skb_reset_transport_header(skb);
 903         skb_reset_network_header(skb);
 904         skb_put(skb, len);
 905         pa = pci_map_single(fnic->pdev, skb->data, len, PCI_DMA_FROMDEVICE);
 906         fnic_queue_rq_desc(rq, skb, pa, len);
 907         return 0;
 908 }
 909
 910 void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
 911 {
 912         struct fc_frame *fp = buf->os_buf;
 913         struct fnic *fnic = vnic_dev_priv(rq->vdev);
 914
 915         pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
 916                          PCI_DMA_FROMDEVICE);
 917
 918         dev_kfree_skb(fp_skb(fp));
 919         buf->os_buf = NULL;
 920 }
 921
 922 /**
 923  * fnic_eth_send() - Send Ethernet frame.
 924  * @fip:        fcoe_ctlr instance.
 925  * @skb:        Ethernet Frame, FIP, without VLAN encapsulation.
 926  */
 927 void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
 928 {
 929         struct fnic *fnic = fnic_from_ctlr(fip);
 930         struct vnic_wq *wq = &fnic->wq[0];
 931         dma_addr_t pa;
 932         struct ethhdr *eth_hdr;
 933         struct vlan_ethhdr *vlan_hdr;
 934         unsigned long flags;
 935
 936         if (!fnic->vlan_hw_insert) {
 937                 eth_hdr = (struct ethhdr *)skb_mac_header(skb);
 938                 vlan_hdr = (struct vlan_ethhdr *)skb_push(skb,
 939                                 sizeof(*vlan_hdr) - sizeof(*eth_hdr));
 940                 memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN);
 941                 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
 942                 vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto;
 943                 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
 944         }
 945
 946         pa = pci_map_single(fnic->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
 947
 948         spin_lock_irqsave(&fnic->wq_lock[0], flags);
 949         if (!vnic_wq_desc_avail(wq)) {
 950                 pci_unmap_single(fnic->pdev, pa, skb->len, PCI_DMA_TODEVICE);
 951                 spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
 952                 kfree_skb(skb);
 953                 return;
 954         }
 955
 956         fnic_queue_wq_eth_desc(wq, skb, pa, skb->len,
 957                                0 /* hw inserts cos value */,
 958                                fnic->vlan_id, 1);
 959         spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
 960 }
 961
 962 /*
 963  * Send FC frame.
 964  */
 965 static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
 966 {
 967         struct vnic_wq *wq = &fnic->wq[0];
 968         struct sk_buff *skb;
 969         dma_addr_t pa;
 970         struct ethhdr *eth_hdr;
 971         struct vlan_ethhdr *vlan_hdr;
 972         struct fcoe_hdr *fcoe_hdr;
 973         struct fc_frame_header *fh;
 974         u32 tot_len, eth_hdr_len;
 975         int ret = 0;
 976         unsigned long flags;
 977
 978         fh = fc_frame_header_get(fp);
 979         skb = fp_skb(fp);
 980
 981         if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
 982             fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb))
 983                 return 0;
 984
 985         if (!fnic->vlan_hw_insert) {
 986                 eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr);
 987                 vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, eth_hdr_len);
 988                 eth_hdr = (struct ethhdr *)vlan_hdr;
 989                 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
 990                 vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE);
 991                 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
 992                 fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1);
 993         } else {
 994                 eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr);
 995                 eth_hdr = (struct ethhdr *)skb_push(skb, eth_hdr_len);
 996                 eth_hdr->h_proto = htons(ETH_P_FCOE);
 997                 fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1);
 998         }
 999
1000         if (fnic->ctlr.map_dest)
1001                 fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
1002         else
1003                 memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN);
1004         memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN);
1005
1006         tot_len = skb->len;
1007         BUG_ON(tot_len % 4);
1008
1009         memset(fcoe_hdr, 0, sizeof(*fcoe_hdr));
1010         fcoe_hdr->fcoe_sof = fr_sof(fp);
1011         if (FC_FCOE_VER)
1012                 FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER);
1013
1014         pa = pci_map_single(fnic->pdev, eth_hdr, tot_len, PCI_DMA_TODEVICE);
1015
1016         spin_lock_irqsave(&fnic->wq_lock[0], flags);
1017
1018         if (!vnic_wq_desc_avail(wq)) {
1019                 pci_unmap_single(fnic->pdev, pa,
1020                                  tot_len, PCI_DMA_TODEVICE);
1021                 ret = -1;
1022                 goto fnic_send_frame_end;
1023         }
1024
1025         fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
1026                            0 /* hw inserts cos value */,
1027                            fnic->vlan_id, 1, 1, 1);
1028 fnic_send_frame_end:
1029         spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1030
1031         if (ret)
1032                 dev_kfree_skb_any(fp_skb(fp));
1033
1034         return ret;
1035 }
1036
1037 /*
1038  * fnic_send
1039  * Routine to send a raw frame
1040  */
1041 int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
1042 {
1043         struct fnic *fnic = lport_priv(lp);
1044         unsigned long flags;
1045
1046         if (fnic->in_remove) {
1047                 dev_kfree_skb(fp_skb(fp));
1048                 return -1;
1049         }
1050
1051         /*
1052          * Queue frame if in a transitional state.
1053          * This occurs while registering the Port_ID / MAC address after FLOGI.
1054          */
1055         spin_lock_irqsave(&fnic->fnic_lock, flags);
1056         if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) {
1057                 skb_queue_tail(&fnic->tx_queue, fp_skb(fp));
1058                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1059                 return 0;
1060         }
1061         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1062
1063         return fnic_send_frame(fnic, fp);
1064 }
1065
1066 /**
1067  * fnic_flush_tx() - send queued frames.
1068  * @fnic: fnic device
1069  *
1070  * Send frames that were waiting to go out in FC or Ethernet mode.
1071  * Whenever changing modes we purge queued frames, so these frames should
1072  * be queued for the stable mode that we're in, either FC or Ethernet.
1073  *
1074  * Called without fnic_lock held.
1075  */
1076 void fnic_flush_tx(struct fnic *fnic)
1077 {
1078         struct sk_buff *skb;
1079         struct fc_frame *fp;
1080
1081         while ((skb = skb_dequeue(&fnic->tx_queue))) {
1082                 fp = (struct fc_frame *)skb;
1083                 fnic_send_frame(fnic, fp);
1084         }
1085 }
1086
1087 /**
1088  * fnic_set_eth_mode() - put fnic into ethernet mode.
1089  * @fnic: fnic device
1090  *
1091  * Called without fnic lock held.
1092  */
1093 static void fnic_set_eth_mode(struct fnic *fnic)
1094 {
1095         unsigned long flags;
1096         enum fnic_state old_state;
1097         int ret;
1098
1099         spin_lock_irqsave(&fnic->fnic_lock, flags);
1100 again:
1101         old_state = fnic->state;
1102         switch (old_state) {
1103         case FNIC_IN_FC_MODE:
1104         case FNIC_IN_ETH_TRANS_FC_MODE:
1105         default:
1106                 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
1107                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1108
1109                 ret = fnic_fw_reset_handler(fnic);
1110
1111                 spin_lock_irqsave(&fnic->fnic_lock, flags);
1112                 if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE)
1113                         goto again;
1114                 if (ret)
1115                         fnic->state = old_state;
1116                 break;
1117
1118         case FNIC_IN_FC_TRANS_ETH_MODE:
1119         case FNIC_IN_ETH_MODE:
1120                 break;
1121         }
1122         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1123 }
1124
1125 static void fnic_wq_complete_frame_send(struct vnic_wq *wq,
1126                                         struct cq_desc *cq_desc,
1127                                         struct vnic_wq_buf *buf, void *opaque)
1128 {
1129         struct sk_buff *skb = buf->os_buf;
1130         struct fc_frame *fp = (struct fc_frame *)skb;
1131         struct fnic *fnic = vnic_dev_priv(wq->vdev);
1132
1133         pci_unmap_single(fnic->pdev, buf->dma_addr,
1134                          buf->len, PCI_DMA_TODEVICE);
1135         dev_kfree_skb_irq(fp_skb(fp));
1136         buf->os_buf = NULL;
1137 }
1138
1139 static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev,
1140                                      struct cq_desc *cq_desc, u8 type,
1141                                      u16 q_number, u16 completed_index,
1142                                      void *opaque)
1143 {
1144         struct fnic *fnic = vnic_dev_priv(vdev);
1145         unsigned long flags;
1146
1147         spin_lock_irqsave(&fnic->wq_lock[q_number], flags);
1148         vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index,
1149                         fnic_wq_complete_frame_send, NULL);
1150         spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags);
1151
1152         return 0;
1153 }
1154
1155 int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do)
1156 {
1157         unsigned int wq_work_done = 0;
1158         unsigned int i;
1159
1160         for (i = 0; i < fnic->raw_wq_count; i++) {
1161                 wq_work_done  += vnic_cq_service(&fnic->cq[fnic->rq_count+i],
1162                                                  work_to_do,
1163                                                  fnic_wq_cmpl_handler_cont,
1164                                                  NULL);
1165         }
1166
1167         return wq_work_done;
1168 }
1169
1170
1171 void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
1172 {
1173         struct fc_frame *fp = buf->os_buf;
1174         struct fnic *fnic = vnic_dev_priv(wq->vdev);
1175
1176         pci_unmap_single(fnic->pdev, buf->dma_addr,
1177                          buf->len, PCI_DMA_TODEVICE);
1178
1179         dev_kfree_skb(fp_skb(fp));
1180         buf->os_buf = NULL;
1181 }
1182
1183 void fnic_fcoe_reset_vlans(struct fnic *fnic)
1184 {
1185         unsigned long flags;
1186         struct fcoe_vlan *vlan;
1187         struct fcoe_vlan *next;
1188
1189         /*
1190          * indicate a link down to fcoe so that all fcf's are free'd
1191          * might not be required since we did this before sending vlan
1192          * discovery request
1193          */
1194         spin_lock_irqsave(&fnic->vlans_lock, flags);
1195         if (!list_empty(&fnic->vlans)) {
1196                 list_for_each_entry_safe(vlan, next, &fnic->vlans, list) {
1197                         list_del(&vlan->list);
1198                         kfree(vlan);
1199                 }
1200         }
1201         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1202 }
1203
1204 void fnic_handle_fip_timer(struct fnic *fnic)
1205 {
1206         unsigned long flags;
1207         struct fcoe_vlan *vlan;
1208         u64 sol_time;
1209
1210         spin_lock_irqsave(&fnic->fnic_lock, flags);
1211         if (fnic->stop_rx_link_events) {
1212                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1213                 return;
1214         }
1215         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1216
1217         if (fnic->ctlr.mode == FIP_ST_NON_FIP)
1218                 return;
1219
1220         spin_lock_irqsave(&fnic->vlans_lock, flags);
1221         if (list_empty(&fnic->vlans)) {
1222                 /* no vlans available, try again */
1223                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1224                           "Start VLAN Discovery\n");
1225                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1226                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1227                 return;
1228         }
1229
1230         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
1231         shost_printk(KERN_DEBUG, fnic->lport->host,
1232                   "fip_timer: vlan %d state %d sol_count %d\n",
1233                   vlan->vid, vlan->state, vlan->sol_count);
1234         switch (vlan->state) {
1235         case FIP_VLAN_USED:
1236                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1237                           "FIP VLAN is selected for FC transaction\n");
1238                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1239                 break;
1240         case FIP_VLAN_FAILED:
1241                 /* if all vlans are in failed state, restart vlan disc */
1242                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1243                           "Start VLAN Discovery\n");
1244                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1245                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1246                 break;
1247         case FIP_VLAN_SENT:
1248                 if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) {
1249                         /*
1250                          * no response on this vlan, remove  from the list.
1251                          * Try the next vlan
1252                          */
1253                         shost_printk(KERN_INFO, fnic->lport->host,
1254                                   "Dequeue this VLAN ID %d from list\n",
1255                                   vlan->vid);
1256                         list_del(&vlan->list);
1257                         kfree(vlan);
1258                         vlan = NULL;
1259                         if (list_empty(&fnic->vlans)) {
1260                                 /* we exhausted all vlans, restart vlan disc */
1261                                 spin_unlock_irqrestore(&fnic->vlans_lock,
1262                                                         flags);
1263                                 shost_printk(KERN_INFO, fnic->lport->host,
1264                                           "fip_timer: vlan list empty, "
1265                                           "trigger vlan disc\n");
1266                                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1267                                 return;
1268                         }
1269                         /* check the next vlan */
1270                         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan,
1271                                                         list);
1272                         fnic->set_vlan(fnic, vlan->vid);
1273                         vlan->state = FIP_VLAN_SENT; /* sent now */
1274                 }
1275                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1276                 vlan->sol_count++;
1277                 sol_time = jiffies + msecs_to_jiffies
1278                                         (FCOE_CTLR_START_DELAY);
1279                 mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
1280                 break;
1281         }
1282 }