kernel/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] = FIP_ALL_FCF_MACS;
  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                         fnic_fc_trace_set_data(fnic->lport->host->host_no,
  73                                 FNIC_FC_LE, "Link Status: DOWN->DOWN",
  74                                 strlen("Link Status: DOWN->DOWN"));
  75                 } else {
  76                         if (old_link_down_cnt != fnic->link_down_cnt) {
  77                                 /* UP -> DOWN -> UP */
  78                                 fnic->lport->host_stats.link_failure_count++;
  79                                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
  80                                 fnic_fc_trace_set_data(
  81                                         fnic->lport->host->host_no,
  82                                         FNIC_FC_LE,
  83                                         "Link Status:UP_DOWN_UP",
  84                                         strlen("Link_Status:UP_DOWN_UP")
  85                                         );
  86                                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
  87                                              "link down\n");
  88                                 fcoe_ctlr_link_down(&fnic->ctlr);
  89                                 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
  90                                         /* start FCoE VLAN discovery */
  91                                         fnic_fc_trace_set_data(
  92                                                 fnic->lport->host->host_no,
  93                                                 FNIC_FC_LE,
  94                                                 "Link Status: UP_DOWN_UP_VLAN",
  95                                                 strlen(
  96                                                 "Link Status: UP_DOWN_UP_VLAN")
  97                                                 );
  98                                         fnic_fcoe_send_vlan_req(fnic);
  99                                         return;
 100                                 }
 101                                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 102                                              "link up\n");
 103                                 fcoe_ctlr_link_up(&fnic->ctlr);
 104                         } else {
 105                                 /* UP -> UP */
 106                                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 107                                 fnic_fc_trace_set_data(
 108                                         fnic->lport->host->host_no, FNIC_FC_LE,
 109                                         "Link Status: UP_UP",
 110                                         strlen("Link Status: UP_UP"));
 111                         }
 112                 }
 113         } else if (fnic->link_status) {
 114                 /* DOWN -> UP */
 115                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 116                 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
 117                         /* start FCoE VLAN discovery */
 118                                 fnic_fc_trace_set_data(
 119                                 fnic->lport->host->host_no,
 120                                 FNIC_FC_LE, "Link Status: DOWN_UP_VLAN",
 121                                 strlen("Link Status: DOWN_UP_VLAN"));
 122                         fnic_fcoe_send_vlan_req(fnic);
 123                         return;
 124                 }
 125                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n");
 126                 fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_LE,
 127                         "Link Status: DOWN_UP", strlen("Link Status: DOWN_UP"));
 128                 fcoe_ctlr_link_up(&fnic->ctlr);
 129         } else {
 130                 /* UP -> DOWN */
 131                 fnic->lport->host_stats.link_failure_count++;
 132                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 133                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link down\n");
 134                 fnic_fc_trace_set_data(
 135                         fnic->lport->host->host_no, FNIC_FC_LE,
 136                         "Link Status: UP_DOWN",
 137                         strlen("Link Status: UP_DOWN"));
 138                 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
 139                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 140                                 "deleting fip-timer during link-down\n");
 141                         del_timer_sync(&fnic->fip_timer);
 142                 }
 143                 fcoe_ctlr_link_down(&fnic->ctlr);
 144         }
 145
 146 }
 147
 148 /*
 149  * This function passes incoming fabric frames to libFC
 150  */
 151 void fnic_handle_frame(struct work_struct *work)
 152 {
 153         struct fnic *fnic = container_of(work, struct fnic, frame_work);
 154         struct fc_lport *lp = fnic->lport;
 155         unsigned long flags;
 156         struct sk_buff *skb;
 157         struct fc_frame *fp;
 158
 159         while ((skb = skb_dequeue(&fnic->frame_queue))) {
 160
 161                 spin_lock_irqsave(&fnic->fnic_lock, flags);
 162                 if (fnic->stop_rx_link_events) {
 163                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 164                         dev_kfree_skb(skb);
 165                         return;
 166                 }
 167                 fp = (struct fc_frame *)skb;
 168
 169                 /*
 170                  * If we're in a transitional state, just re-queue and return.
 171                  * The queue will be serviced when we get to a stable state.
 172                  */
 173                 if (fnic->state != FNIC_IN_FC_MODE &&
 174                     fnic->state != FNIC_IN_ETH_MODE) {
 175                         skb_queue_head(&fnic->frame_queue, skb);
 176                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 177                         return;
 178                 }
 179                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 180
 181                 fc_exch_recv(lp, fp);
 182         }
 183 }
 184
 185 void fnic_fcoe_evlist_free(struct fnic *fnic)
 186 {
 187         struct fnic_event *fevt = NULL;
 188         struct fnic_event *next = NULL;
 189         unsigned long flags;
 190
 191         spin_lock_irqsave(&fnic->fnic_lock, flags);
 192         if (list_empty(&fnic->evlist)) {
 193                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 194                 return;
 195         }
 196
 197         list_for_each_entry_safe(fevt, next, &fnic->evlist, list) {
 198                 list_del(&fevt->list);
 199                 kfree(fevt);
 200         }
 201         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 202 }
 203
 204 void fnic_handle_event(struct work_struct *work)
 205 {
 206         struct fnic *fnic = container_of(work, struct fnic, event_work);
 207         struct fnic_event *fevt = NULL;
 208         struct fnic_event *next = NULL;
 209         unsigned long flags;
 210
 211         spin_lock_irqsave(&fnic->fnic_lock, flags);
 212         if (list_empty(&fnic->evlist)) {
 213                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 214                 return;
 215         }
 216
 217         list_for_each_entry_safe(fevt, next, &fnic->evlist, list) {
 218                 if (fnic->stop_rx_link_events) {
 219                         list_del(&fevt->list);
 220                         kfree(fevt);
 221                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 222                         return;
 223                 }
 224                 /*
 225                  * If we're in a transitional state, just re-queue and return.
 226                  * The queue will be serviced when we get to a stable state.
 227                  */
 228                 if (fnic->state != FNIC_IN_FC_MODE &&
 229                     fnic->state != FNIC_IN_ETH_MODE) {
 230                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 231                         return;
 232                 }
 233
 234                 list_del(&fevt->list);
 235                 switch (fevt->event) {
 236                 case FNIC_EVT_START_VLAN_DISC:
 237                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 238                         fnic_fcoe_send_vlan_req(fnic);
 239                         spin_lock_irqsave(&fnic->fnic_lock, flags);
 240                         break;
 241                 case FNIC_EVT_START_FCF_DISC:
 242                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 243                                   "Start FCF Discovery\n");
 244                         fnic_fcoe_start_fcf_disc(fnic);
 245                         break;
 246                 default:
 247                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 248                                   "Unknown event 0x%x\n", fevt->event);
 249                         break;
 250                 }
 251                 kfree(fevt);
 252         }
 253         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 254 }
 255
 256 /**
 257  * Check if the Received FIP FLOGI frame is rejected
 258  * @fip: The FCoE controller that received the frame
 259  * @skb: The received FIP frame
 260  *
 261  * Returns non-zero if the frame is rejected with unsupported cmd with
 262  * insufficient resource els explanation.
 263  */
 264 static inline int is_fnic_fip_flogi_reject(struct fcoe_ctlr *fip,
 265                                          struct sk_buff *skb)
 266 {
 267         struct fc_lport *lport = fip->lp;
 268         struct fip_header *fiph;
 269         struct fc_frame_header *fh = NULL;
 270         struct fip_desc *desc;
 271         struct fip_encaps *els;
 272         enum fip_desc_type els_dtype = 0;
 273         u16 op;
 274         u8 els_op;
 275         u8 sub;
 276
 277         size_t els_len = 0;
 278         size_t rlen;
 279         size_t dlen = 0;
 280
 281         if (skb_linearize(skb))
 282                 return 0;
 283
 284         if (skb->len < sizeof(*fiph))
 285                 return 0;
 286
 287         fiph = (struct fip_header *)skb->data;
 288         op = ntohs(fiph->fip_op);
 289         sub = fiph->fip_subcode;
 290
 291         if (op != FIP_OP_LS)
 292                 return 0;
 293
 294         if (sub != FIP_SC_REP)
 295                 return 0;
 296
 297         rlen = ntohs(fiph->fip_dl_len) * 4;
 298         if (rlen + sizeof(*fiph) > skb->len)
 299                 return 0;
 300
 301         desc = (struct fip_desc *)(fiph + 1);
 302         dlen = desc->fip_dlen * FIP_BPW;
 303
 304         if (desc->fip_dtype == FIP_DT_FLOGI) {
 305
 306                 if (dlen < sizeof(*els) + sizeof(*fh) + 1)
 307                         return 0;
 308
 309                 els_len = dlen - sizeof(*els);
 310                 els = (struct fip_encaps *)desc;
 311                 fh = (struct fc_frame_header *)(els + 1);
 312                 els_dtype = desc->fip_dtype;
 313
 314                 if (!fh)
 315                         return 0;
 316
 317                 /*
 318                  * ELS command code, reason and explanation should be = Reject,
 319                  * unsupported command and insufficient resource
 320                  */
 321                 els_op = *(u8 *)(fh + 1);
 322                 if (els_op == ELS_LS_RJT) {
 323                         shost_printk(KERN_INFO, lport->host,
 324                                   "Flogi Request Rejected by Switch\n");
 325                         return 1;
 326                 }
 327                 shost_printk(KERN_INFO, lport->host,
 328                                 "Flogi Request Accepted by Switch\n");
 329         }
 330         return 0;
 331 }
 332
 333 static void fnic_fcoe_send_vlan_req(struct fnic *fnic)
 334 {
 335         struct fcoe_ctlr *fip = &fnic->ctlr;
 336         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 337         struct sk_buff *skb;
 338         char *eth_fr;
 339         int fr_len;
 340         struct fip_vlan *vlan;
 341         u64 vlan_tov;
 342
 343         fnic_fcoe_reset_vlans(fnic);
 344         fnic->set_vlan(fnic, 0);
 345         FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 346                   "Sending VLAN request...\n");
 347         skb = dev_alloc_skb(sizeof(struct fip_vlan));
 348         if (!skb)
 349                 return;
 350
 351         fr_len = sizeof(*vlan);
 352         eth_fr = (char *)skb->data;
 353         vlan = (struct fip_vlan *)eth_fr;
 354
 355         memset(vlan, 0, sizeof(*vlan));
 356         memcpy(vlan->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
 357         memcpy(vlan->eth.h_dest, fcoe_all_fcfs, ETH_ALEN);
 358         vlan->eth.h_proto = htons(ETH_P_FIP);
 359
 360         vlan->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
 361         vlan->fip.fip_op = htons(FIP_OP_VLAN);
 362         vlan->fip.fip_subcode = FIP_SC_VL_REQ;
 363         vlan->fip.fip_dl_len = htons(sizeof(vlan->desc) / FIP_BPW);
 364
 365         vlan->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
 366         vlan->desc.mac.fd_desc.fip_dlen = sizeof(vlan->desc.mac) / FIP_BPW;
 367         memcpy(&vlan->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
 368
 369         vlan->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
 370         vlan->desc.wwnn.fd_desc.fip_dlen = sizeof(vlan->desc.wwnn) / FIP_BPW;
 371         put_unaligned_be64(fip->lp->wwnn, &vlan->desc.wwnn.fd_wwn);
 372         atomic64_inc(&fnic_stats->vlan_stats.vlan_disc_reqs);
 373
 374         skb_put(skb, sizeof(*vlan));
 375         skb->protocol = htons(ETH_P_FIP);
 376         skb_reset_mac_header(skb);
 377         skb_reset_network_header(skb);
 378         fip->send(fip, skb);
 379
 380         /* set a timer so that we can retry if there no response */
 381         vlan_tov = jiffies + msecs_to_jiffies(FCOE_CTLR_FIPVLAN_TOV);
 382         mod_timer(&fnic->fip_timer, round_jiffies(vlan_tov));
 383 }
 384
 385 static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *skb)
 386 {
 387         struct fcoe_ctlr *fip = &fnic->ctlr;
 388         struct fip_header *fiph;
 389         struct fip_desc *desc;
 390         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 391         u16 vid;
 392         size_t rlen;
 393         size_t dlen;
 394         struct fcoe_vlan *vlan;
 395         u64 sol_time;
 396         unsigned long flags;
 397
 398         FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 399                   "Received VLAN response...\n");
 400
 401         fiph = (struct fip_header *) skb->data;
 402
 403         FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 404                   "Received VLAN response... OP 0x%x SUB_OP 0x%x\n",
 405                   ntohs(fiph->fip_op), fiph->fip_subcode);
 406
 407         rlen = ntohs(fiph->fip_dl_len) * 4;
 408         fnic_fcoe_reset_vlans(fnic);
 409         spin_lock_irqsave(&fnic->vlans_lock, flags);
 410         desc = (struct fip_desc *)(fiph + 1);
 411         while (rlen > 0) {
 412                 dlen = desc->fip_dlen * FIP_BPW;
 413                 switch (desc->fip_dtype) {
 414                 case FIP_DT_VLAN:
 415                         vid = ntohs(((struct fip_vlan_desc *)desc)->fd_vlan);
 416                         shost_printk(KERN_INFO, fnic->lport->host,
 417                                   "process_vlan_resp: FIP VLAN %d\n", vid);
 418                         vlan = kmalloc(sizeof(*vlan),
 419                                                         GFP_ATOMIC);
 420                         if (!vlan) {
 421                                 /* retry from timer */
 422                                 spin_unlock_irqrestore(&fnic->vlans_lock,
 423                                                         flags);
 424                                 goto out;
 425                         }
 426                         memset(vlan, 0, sizeof(struct fcoe_vlan));
 427                         vlan->vid = vid & 0x0fff;
 428                         vlan->state = FIP_VLAN_AVAIL;
 429                         list_add_tail(&vlan->list, &fnic->vlans);
 430                         break;
 431                 }
 432                 desc = (struct fip_desc *)((char *)desc + dlen);
 433                 rlen -= dlen;
 434         }
 435
 436         /* any VLAN descriptors present ? */
 437         if (list_empty(&fnic->vlans)) {
 438                 /* retry from timer */
 439                 atomic64_inc(&fnic_stats->vlan_stats.resp_withno_vlanID);
 440                 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 441                           "No VLAN descriptors in FIP VLAN response\n");
 442                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 443                 goto out;
 444         }
 445
 446         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
 447         fnic->set_vlan(fnic, vlan->vid);
 448         vlan->state = FIP_VLAN_SENT; /* sent now */
 449         vlan->sol_count++;
 450         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 451
 452         /* start the solicitation */
 453         fcoe_ctlr_link_up(fip);
 454
 455         sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
 456         mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
 457 out:
 458         return;
 459 }
 460
 461 static void fnic_fcoe_start_fcf_disc(struct fnic *fnic)
 462 {
 463         unsigned long flags;
 464         struct fcoe_vlan *vlan;
 465         u64 sol_time;
 466
 467         spin_lock_irqsave(&fnic->vlans_lock, flags);
 468         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
 469         fnic->set_vlan(fnic, vlan->vid);
 470         vlan->state = FIP_VLAN_SENT; /* sent now */
 471         vlan->sol_count = 1;
 472         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 473
 474         /* start the solicitation */
 475         fcoe_ctlr_link_up(&fnic->ctlr);
 476
 477         sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
 478         mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
 479 }
 480
 481 static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag)
 482 {
 483         unsigned long flags;
 484         struct fcoe_vlan *fvlan;
 485
 486         spin_lock_irqsave(&fnic->vlans_lock, flags);
 487         if (list_empty(&fnic->vlans)) {
 488                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 489                 return -EINVAL;
 490         }
 491
 492         fvlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
 493         if (fvlan->state == FIP_VLAN_USED) {
 494                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 495                 return 0;
 496         }
 497
 498         if (fvlan->state == FIP_VLAN_SENT) {
 499                 fvlan->state = FIP_VLAN_USED;
 500                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 501                 return 0;
 502         }
 503         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 504         return -EINVAL;
 505 }
 506
 507 static void fnic_event_enq(struct fnic *fnic, enum fnic_evt ev)
 508 {
 509         struct fnic_event *fevt;
 510         unsigned long flags;
 511
 512         fevt = kmalloc(sizeof(*fevt), GFP_ATOMIC);
 513         if (!fevt)
 514                 return;
 515
 516         fevt->fnic = fnic;
 517         fevt->event = ev;
 518
 519         spin_lock_irqsave(&fnic->fnic_lock, flags);
 520         list_add_tail(&fevt->list, &fnic->evlist);
 521         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 522
 523         schedule_work(&fnic->event_work);
 524 }
 525
 526 static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb)
 527 {
 528         struct fip_header *fiph;
 529         int ret = 1;
 530         u16 op;
 531         u8 sub;
 532
 533         if (!skb || !(skb->data))
 534                 return -1;
 535
 536         if (skb_linearize(skb))
 537                 goto drop;
 538
 539         fiph = (struct fip_header *)skb->data;
 540         op = ntohs(fiph->fip_op);
 541         sub = fiph->fip_subcode;
 542
 543         if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
 544                 goto drop;
 545
 546         if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
 547                 goto drop;
 548
 549         if (op == FIP_OP_DISC && sub == FIP_SC_ADV) {
 550                 if (fnic_fcoe_vlan_check(fnic, ntohs(fiph->fip_flags)))
 551                         goto drop;
 552                 /* pass it on to fcoe */
 553                 ret = 1;
 554         } else if (op == FIP_OP_VLAN && sub == FIP_SC_VL_REP) {
 555                 /* set the vlan as used */
 556                 fnic_fcoe_process_vlan_resp(fnic, skb);
 557                 ret = 0;
 558         } else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) {
 559                 /* received CVL request, restart vlan disc */
 560                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
 561                 /* pass it on to fcoe */
 562                 ret = 1;
 563         }
 564 drop:
 565         return ret;
 566 }
 567
 568 void fnic_handle_fip_frame(struct work_struct *work)
 569 {
 570         struct fnic *fnic = container_of(work, struct fnic, fip_frame_work);
 571         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 572         unsigned long flags;
 573         struct sk_buff *skb;
 574         struct ethhdr *eh;
 575
 576         while ((skb = skb_dequeue(&fnic->fip_frame_queue))) {
 577                 spin_lock_irqsave(&fnic->fnic_lock, flags);
 578                 if (fnic->stop_rx_link_events) {
 579                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 580                         dev_kfree_skb(skb);
 581                         return;
 582                 }
 583                 /*
 584                  * If we're in a transitional state, just re-queue and return.
 585                  * The queue will be serviced when we get to a stable state.
 586                  */
 587                 if (fnic->state != FNIC_IN_FC_MODE &&
 588                     fnic->state != FNIC_IN_ETH_MODE) {
 589                         skb_queue_head(&fnic->fip_frame_queue, skb);
 590                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 591                         return;
 592                 }
 593                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 594                 eh = (struct ethhdr *)skb->data;
 595                 if (eh->h_proto == htons(ETH_P_FIP)) {
 596                         skb_pull(skb, sizeof(*eh));
 597                         if (fnic_fcoe_handle_fip_frame(fnic, skb) <= 0) {
 598                                 dev_kfree_skb(skb);
 599                                 continue;
 600                         }
 601                         /*
 602                          * If there's FLOGI rejects - clear all
 603                          * fcf's & restart from scratch
 604                          */
 605                         if (is_fnic_fip_flogi_reject(&fnic->ctlr, skb)) {
 606                                 atomic64_inc(
 607                                         &fnic_stats->vlan_stats.flogi_rejects);
 608                                 shost_printk(KERN_INFO, fnic->lport->host,
 609                                           "Trigger a Link down - VLAN Disc\n");
 610                                 fcoe_ctlr_link_down(&fnic->ctlr);
 611                                 /* start FCoE VLAN discovery */
 612                                 fnic_fcoe_send_vlan_req(fnic);
 613                                 dev_kfree_skb(skb);
 614                                 continue;
 615                         }
 616                         fcoe_ctlr_recv(&fnic->ctlr, skb);
 617                         continue;
 618                 }
 619         }
 620 }
 621
 622 /**
 623  * fnic_import_rq_eth_pkt() - handle received FCoE or FIP frame.
 624  * @fnic:       fnic instance.
 625  * @skb:        Ethernet Frame.
 626  */
 627 static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb)
 628 {
 629         struct fc_frame *fp;
 630         struct ethhdr *eh;
 631         struct fcoe_hdr *fcoe_hdr;
 632         struct fcoe_crc_eof *ft;
 633
 634         /*
 635          * Undo VLAN encapsulation if present.
 636          */
 637         eh = (struct ethhdr *)skb->data;
 638         if (eh->h_proto == htons(ETH_P_8021Q)) {
 639                 memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
 640                 eh = (struct ethhdr *)skb_pull(skb, VLAN_HLEN);
 641                 skb_reset_mac_header(skb);
 642         }
 643         if (eh->h_proto == htons(ETH_P_FIP)) {
 644                 if (!(fnic->config.flags & VFCF_FIP_CAPABLE)) {
 645                         printk(KERN_ERR "Dropped FIP frame, as firmware "
 646                                         "uses non-FIP mode, Enable FIP "
 647                                         "using UCSM\n");
 648                         goto drop;
 649                 }
 650                 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
 651                         FNIC_FC_RECV|0x80, (char *)skb->data, skb->len)) != 0) {
 652                         printk(KERN_ERR "fnic ctlr frame trace error!!!");
 653                 }
 654                 skb_queue_tail(&fnic->fip_frame_queue, skb);
 655                 queue_work(fnic_fip_queue, &fnic->fip_frame_work);
 656                 return 1;               /* let caller know packet was used */
 657         }
 658         if (eh->h_proto != htons(ETH_P_FCOE))
 659                 goto drop;
 660         skb_set_network_header(skb, sizeof(*eh));
 661         skb_pull(skb, sizeof(*eh));
 662
 663         fcoe_hdr = (struct fcoe_hdr *)skb->data;
 664         if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER)
 665                 goto drop;
 666
 667         fp = (struct fc_frame *)skb;
 668         fc_frame_init(fp);
 669         fr_sof(fp) = fcoe_hdr->fcoe_sof;
 670         skb_pull(skb, sizeof(struct fcoe_hdr));
 671         skb_reset_transport_header(skb);
 672
 673         ft = (struct fcoe_crc_eof *)(skb->data + skb->len - sizeof(*ft));
 674         fr_eof(fp) = ft->fcoe_eof;
 675         skb_trim(skb, skb->len - sizeof(*ft));
 676         return 0;
 677 drop:
 678         dev_kfree_skb_irq(skb);
 679         return -1;
 680 }
 681
 682 /**
 683  * fnic_update_mac_locked() - set data MAC address and filters.
 684  * @fnic:       fnic instance.
 685  * @new:        newly-assigned FCoE MAC address.
 686  *
 687  * Called with the fnic lock held.
 688  */
 689 void fnic_update_mac_locked(struct fnic *fnic, u8 *new)
 690 {
 691         u8 *ctl = fnic->ctlr.ctl_src_addr;
 692         u8 *data = fnic->data_src_addr;
 693
 694         if (is_zero_ether_addr(new))
 695                 new = ctl;
 696         if (ether_addr_equal(data, new))
 697                 return;
 698         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n", new);
 699         if (!is_zero_ether_addr(data) && !ether_addr_equal(data, ctl))
 700                 vnic_dev_del_addr(fnic->vdev, data);
 701         memcpy(data, new, ETH_ALEN);
 702         if (!ether_addr_equal(new, ctl))
 703                 vnic_dev_add_addr(fnic->vdev, new);
 704 }
 705
 706 /**
 707  * fnic_update_mac() - set data MAC address and filters.
 708  * @lport:      local port.
 709  * @new:        newly-assigned FCoE MAC address.
 710  */
 711 void fnic_update_mac(struct fc_lport *lport, u8 *new)
 712 {
 713         struct fnic *fnic = lport_priv(lport);
 714
 715         spin_lock_irq(&fnic->fnic_lock);
 716         fnic_update_mac_locked(fnic, new);
 717         spin_unlock_irq(&fnic->fnic_lock);
 718 }
 719
 720 /**
 721  * fnic_set_port_id() - set the port_ID after successful FLOGI.
 722  * @lport:      local port.
 723  * @port_id:    assigned FC_ID.
 724  * @fp:         received frame containing the FLOGI accept or NULL.
 725  *
 726  * This is called from libfc when a new FC_ID has been assigned.
 727  * This causes us to reset the firmware to FC_MODE and setup the new MAC
 728  * address and FC_ID.
 729  *
 730  * It is also called with FC_ID 0 when we're logged off.
 731  *
 732  * If the FC_ID is due to point-to-point, fp may be NULL.
 733  */
 734 void fnic_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp)
 735 {
 736         struct fnic *fnic = lport_priv(lport);
 737         u8 *mac;
 738         int ret;
 739
 740         FNIC_FCS_DBG(KERN_DEBUG, lport->host, "set port_id %x fp %p\n",
 741                      port_id, fp);
 742
 743         /*
 744          * If we're clearing the FC_ID, change to use the ctl_src_addr.
 745          * Set ethernet mode to send FLOGI.
 746          */
 747         if (!port_id) {
 748                 fnic_update_mac(lport, fnic->ctlr.ctl_src_addr);
 749                 fnic_set_eth_mode(fnic);
 750                 return;
 751         }
 752
 753         if (fp) {
 754                 mac = fr_cb(fp)->granted_mac;
 755                 if (is_zero_ether_addr(mac)) {
 756                         /* non-FIP - FLOGI already accepted - ignore return */
 757                         fcoe_ctlr_recv_flogi(&fnic->ctlr, lport, fp);
 758                 }
 759                 fnic_update_mac(lport, mac);
 760         }
 761
 762         /* Change state to reflect transition to FC mode */
 763         spin_lock_irq(&fnic->fnic_lock);
 764         if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE)
 765                 fnic->state = FNIC_IN_ETH_TRANS_FC_MODE;
 766         else {
 767                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 768                              "Unexpected fnic state %s while"
 769                              " processing flogi resp\n",
 770                              fnic_state_to_str(fnic->state));
 771                 spin_unlock_irq(&fnic->fnic_lock);
 772                 return;
 773         }
 774         spin_unlock_irq(&fnic->fnic_lock);
 775
 776         /*
 777          * Send FLOGI registration to firmware to set up FC mode.
 778          * The new address will be set up when registration completes.
 779          */
 780         ret = fnic_flogi_reg_handler(fnic, port_id);
 781
 782         if (ret < 0) {
 783                 spin_lock_irq(&fnic->fnic_lock);
 784                 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE)
 785                         fnic->state = FNIC_IN_ETH_MODE;
 786                 spin_unlock_irq(&fnic->fnic_lock);
 787         }
 788 }
 789
 790 static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc
 791                                     *cq_desc, struct vnic_rq_buf *buf,
 792                                     int skipped __attribute__((unused)),
 793                                     void *opaque)
 794 {
 795         struct fnic *fnic = vnic_dev_priv(rq->vdev);
 796         struct sk_buff *skb;
 797         struct fc_frame *fp;
 798         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 799         unsigned int eth_hdrs_stripped;
 800         u8 type, color, eop, sop, ingress_port, vlan_stripped;
 801         u8 fcoe = 0, fcoe_sof, fcoe_eof;
 802         u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0;
 803         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
 804         u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc;
 805         u8 fcs_ok = 1, packet_error = 0;
 806         u16 q_number, completed_index, bytes_written = 0, vlan, checksum;
 807         u32 rss_hash;
 808         u16 exchange_id, tmpl;
 809         u8 sof = 0;
 810         u8 eof = 0;
 811         u32 fcp_bytes_written = 0;
 812         unsigned long flags;
 813
 814         pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
 815                          PCI_DMA_FROMDEVICE);
 816         skb = buf->os_buf;
 817         fp = (struct fc_frame *)skb;
 818         buf->os_buf = NULL;
 819
 820         cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index);
 821         if (type == CQ_DESC_TYPE_RQ_FCP) {
 822                 cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc,
 823                                    &type, &color, &q_number, &completed_index,
 824                                    &eop, &sop, &fcoe_fc_crc_ok, &exchange_id,
 825                                    &tmpl, &fcp_bytes_written, &sof, &eof,
 826                                    &ingress_port, &packet_error,
 827                                    &fcoe_enc_error, &fcs_ok, &vlan_stripped,
 828                                    &vlan);
 829                 eth_hdrs_stripped = 1;
 830                 skb_trim(skb, fcp_bytes_written);
 831                 fr_sof(fp) = sof;
 832                 fr_eof(fp) = eof;
 833
 834         } else if (type == CQ_DESC_TYPE_RQ_ENET) {
 835                 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
 836                                     &type, &color, &q_number, &completed_index,
 837                                     &ingress_port, &fcoe, &eop, &sop,
 838                                     &rss_type, &csum_not_calc, &rss_hash,
 839                                     &bytes_written, &packet_error,
 840                                     &vlan_stripped, &vlan, &checksum,
 841                                     &fcoe_sof, &fcoe_fc_crc_ok,
 842                                     &fcoe_enc_error, &fcoe_eof,
 843                                     &tcp_udp_csum_ok, &udp, &tcp,
 844                                     &ipv4_csum_ok, &ipv6, &ipv4,
 845                                     &ipv4_fragment, &fcs_ok);
 846                 eth_hdrs_stripped = 0;
 847                 skb_trim(skb, bytes_written);
 848                 if (!fcs_ok) {
 849                         atomic64_inc(&fnic_stats->misc_stats.frame_errors);
 850                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 851                                      "fcs error.  dropping packet.\n");
 852                         goto drop;
 853                 }
 854                 if (fnic_import_rq_eth_pkt(fnic, skb))
 855                         return;
 856
 857         } else {
 858                 /* wrong CQ type*/
 859                 shost_printk(KERN_ERR, fnic->lport->host,
 860                              "fnic rq_cmpl wrong cq type x%x\n", type);
 861                 goto drop;
 862         }
 863
 864         if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) {
 865                 atomic64_inc(&fnic_stats->misc_stats.frame_errors);
 866                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 867                              "fnic rq_cmpl fcoe x%x fcsok x%x"
 868                              " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err"
 869                              " x%x\n",
 870                              fcoe, fcs_ok, packet_error,
 871                              fcoe_fc_crc_ok, fcoe_enc_error);
 872                 goto drop;
 873         }
 874
 875         spin_lock_irqsave(&fnic->fnic_lock, flags);
 876         if (fnic->stop_rx_link_events) {
 877                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 878                 goto drop;
 879         }
 880         fr_dev(fp) = fnic->lport;
 881         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 882         if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_RECV,
 883                                         (char *)skb->data, skb->len)) != 0) {
 884                 printk(KERN_ERR "fnic ctlr frame trace error!!!");
 885         }
 886
 887         skb_queue_tail(&fnic->frame_queue, skb);
 888         queue_work(fnic_event_queue, &fnic->frame_work);
 889
 890         return;
 891 drop:
 892         dev_kfree_skb_irq(skb);
 893 }
 894
 895 static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev,
 896                                      struct cq_desc *cq_desc, u8 type,
 897                                      u16 q_number, u16 completed_index,
 898                                      void *opaque)
 899 {
 900         struct fnic *fnic = vnic_dev_priv(vdev);
 901
 902         vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index,
 903                         VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv,
 904                         NULL);
 905         return 0;
 906 }
 907
 908 int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do)
 909 {
 910         unsigned int tot_rq_work_done = 0, cur_work_done;
 911         unsigned int i;
 912         int err;
 913
 914         for (i = 0; i < fnic->rq_count; i++) {
 915                 cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do,
 916                                                 fnic_rq_cmpl_handler_cont,
 917                                                 NULL);
 918                 if (cur_work_done) {
 919                         err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
 920                         if (err)
 921                                 shost_printk(KERN_ERR, fnic->lport->host,
 922                                              "fnic_alloc_rq_frame can't alloc"
 923                                              " frame\n");
 924                 }
 925                 tot_rq_work_done += cur_work_done;
 926         }
 927
 928         return tot_rq_work_done;
 929 }
 930
 931 /*
 932  * This function is called once at init time to allocate and fill RQ
 933  * buffers. Subsequently, it is called in the interrupt context after RQ
 934  * buffer processing to replenish the buffers in the RQ
 935  */
 936 int fnic_alloc_rq_frame(struct vnic_rq *rq)
 937 {
 938         struct fnic *fnic = vnic_dev_priv(rq->vdev);
 939         struct sk_buff *skb;
 940         u16 len;
 941         dma_addr_t pa;
 942
 943         len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM;
 944         skb = dev_alloc_skb(len);
 945         if (!skb) {
 946                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 947                              "Unable to allocate RQ sk_buff\n");
 948                 return -ENOMEM;
 949         }
 950         skb_reset_mac_header(skb);
 951         skb_reset_transport_header(skb);
 952         skb_reset_network_header(skb);
 953         skb_put(skb, len);
 954         pa = pci_map_single(fnic->pdev, skb->data, len, PCI_DMA_FROMDEVICE);
 955         fnic_queue_rq_desc(rq, skb, pa, len);
 956         return 0;
 957 }
 958
 959 void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
 960 {
 961         struct fc_frame *fp = buf->os_buf;
 962         struct fnic *fnic = vnic_dev_priv(rq->vdev);
 963
 964         pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
 965                          PCI_DMA_FROMDEVICE);
 966
 967         dev_kfree_skb(fp_skb(fp));
 968         buf->os_buf = NULL;
 969 }
 970
 971 /**
 972  * fnic_eth_send() - Send Ethernet frame.
 973  * @fip:        fcoe_ctlr instance.
 974  * @skb:        Ethernet Frame, FIP, without VLAN encapsulation.
 975  */
 976 void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
 977 {
 978         struct fnic *fnic = fnic_from_ctlr(fip);
 979         struct vnic_wq *wq = &fnic->wq[0];
 980         dma_addr_t pa;
 981         struct ethhdr *eth_hdr;
 982         struct vlan_ethhdr *vlan_hdr;
 983         unsigned long flags;
 984
 985         if (!fnic->vlan_hw_insert) {
 986                 eth_hdr = (struct ethhdr *)skb_mac_header(skb);
 987                 vlan_hdr = (struct vlan_ethhdr *)skb_push(skb,
 988                                 sizeof(*vlan_hdr) - sizeof(*eth_hdr));
 989                 memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN);
 990                 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
 991                 vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto;
 992                 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
 993                 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
 994                         FNIC_FC_SEND|0x80, (char *)eth_hdr, skb->len)) != 0) {
 995                         printk(KERN_ERR "fnic ctlr frame trace error!!!");
 996                 }
 997         } else {
 998                 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
 999                         FNIC_FC_SEND|0x80, (char *)skb->data, skb->len)) != 0) {
1000                         printk(KERN_ERR "fnic ctlr frame trace error!!!");
1001                 }
1002         }
1003
1004         pa = pci_map_single(fnic->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
1005
1006         spin_lock_irqsave(&fnic->wq_lock[0], flags);
1007         if (!vnic_wq_desc_avail(wq)) {
1008                 pci_unmap_single(fnic->pdev, pa, skb->len, PCI_DMA_TODEVICE);
1009                 spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1010                 kfree_skb(skb);
1011                 return;
1012         }
1013
1014         fnic_queue_wq_eth_desc(wq, skb, pa, skb->len,
1015                                0 /* hw inserts cos value */,
1016                                fnic->vlan_id, 1);
1017         spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1018 }
1019
1020 /*
1021  * Send FC frame.
1022  */
1023 static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
1024 {
1025         struct vnic_wq *wq = &fnic->wq[0];
1026         struct sk_buff *skb;
1027         dma_addr_t pa;
1028         struct ethhdr *eth_hdr;
1029         struct vlan_ethhdr *vlan_hdr;
1030         struct fcoe_hdr *fcoe_hdr;
1031         struct fc_frame_header *fh;
1032         u32 tot_len, eth_hdr_len;
1033         int ret = 0;
1034         unsigned long flags;
1035
1036         fh = fc_frame_header_get(fp);
1037         skb = fp_skb(fp);
1038
1039         if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
1040             fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb))
1041                 return 0;
1042
1043         if (!fnic->vlan_hw_insert) {
1044                 eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr);
1045                 vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, eth_hdr_len);
1046                 eth_hdr = (struct ethhdr *)vlan_hdr;
1047                 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
1048                 vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE);
1049                 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
1050                 fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1);
1051         } else {
1052                 eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr);
1053                 eth_hdr = (struct ethhdr *)skb_push(skb, eth_hdr_len);
1054                 eth_hdr->h_proto = htons(ETH_P_FCOE);
1055                 fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1);
1056         }
1057
1058         if (fnic->ctlr.map_dest)
1059                 fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
1060         else
1061                 memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN);
1062         memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN);
1063
1064         tot_len = skb->len;
1065         BUG_ON(tot_len % 4);
1066
1067         memset(fcoe_hdr, 0, sizeof(*fcoe_hdr));
1068         fcoe_hdr->fcoe_sof = fr_sof(fp);
1069         if (FC_FCOE_VER)
1070                 FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER);
1071
1072         pa = pci_map_single(fnic->pdev, eth_hdr, tot_len, PCI_DMA_TODEVICE);
1073
1074         if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_SEND,
1075                                 (char *)eth_hdr, tot_len)) != 0) {
1076                 printk(KERN_ERR "fnic ctlr frame trace error!!!");
1077         }
1078
1079         spin_lock_irqsave(&fnic->wq_lock[0], flags);
1080
1081         if (!vnic_wq_desc_avail(wq)) {
1082                 pci_unmap_single(fnic->pdev, pa,
1083                                  tot_len, PCI_DMA_TODEVICE);
1084                 ret = -1;
1085                 goto fnic_send_frame_end;
1086         }
1087
1088         fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
1089                            0 /* hw inserts cos value */,
1090                            fnic->vlan_id, 1, 1, 1);
1091 fnic_send_frame_end:
1092         spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1093
1094         if (ret)
1095                 dev_kfree_skb_any(fp_skb(fp));
1096
1097         return ret;
1098 }
1099
1100 /*
1101  * fnic_send
1102  * Routine to send a raw frame
1103  */
1104 int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
1105 {
1106         struct fnic *fnic = lport_priv(lp);
1107         unsigned long flags;
1108
1109         if (fnic->in_remove) {
1110                 dev_kfree_skb(fp_skb(fp));
1111                 return -1;
1112         }
1113
1114         /*
1115          * Queue frame if in a transitional state.
1116          * This occurs while registering the Port_ID / MAC address after FLOGI.
1117          */
1118         spin_lock_irqsave(&fnic->fnic_lock, flags);
1119         if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) {
1120                 skb_queue_tail(&fnic->tx_queue, fp_skb(fp));
1121                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1122                 return 0;
1123         }
1124         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1125
1126         return fnic_send_frame(fnic, fp);
1127 }
1128
1129 /**
1130  * fnic_flush_tx() - send queued frames.
1131  * @fnic: fnic device
1132  *
1133  * Send frames that were waiting to go out in FC or Ethernet mode.
1134  * Whenever changing modes we purge queued frames, so these frames should
1135  * be queued for the stable mode that we're in, either FC or Ethernet.
1136  *
1137  * Called without fnic_lock held.
1138  */
1139 void fnic_flush_tx(struct fnic *fnic)
1140 {
1141         struct sk_buff *skb;
1142         struct fc_frame *fp;
1143
1144         while ((skb = skb_dequeue(&fnic->tx_queue))) {
1145                 fp = (struct fc_frame *)skb;
1146                 fnic_send_frame(fnic, fp);
1147         }
1148 }
1149
1150 /**
1151  * fnic_set_eth_mode() - put fnic into ethernet mode.
1152  * @fnic: fnic device
1153  *
1154  * Called without fnic lock held.
1155  */
1156 static void fnic_set_eth_mode(struct fnic *fnic)
1157 {
1158         unsigned long flags;
1159         enum fnic_state old_state;
1160         int ret;
1161
1162         spin_lock_irqsave(&fnic->fnic_lock, flags);
1163 again:
1164         old_state = fnic->state;
1165         switch (old_state) {
1166         case FNIC_IN_FC_MODE:
1167         case FNIC_IN_ETH_TRANS_FC_MODE:
1168         default:
1169                 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
1170                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1171
1172                 ret = fnic_fw_reset_handler(fnic);
1173
1174                 spin_lock_irqsave(&fnic->fnic_lock, flags);
1175                 if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE)
1176                         goto again;
1177                 if (ret)
1178                         fnic->state = old_state;
1179                 break;
1180
1181         case FNIC_IN_FC_TRANS_ETH_MODE:
1182         case FNIC_IN_ETH_MODE:
1183                 break;
1184         }
1185         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1186 }
1187
1188 static void fnic_wq_complete_frame_send(struct vnic_wq *wq,
1189                                         struct cq_desc *cq_desc,
1190                                         struct vnic_wq_buf *buf, void *opaque)
1191 {
1192         struct sk_buff *skb = buf->os_buf;
1193         struct fc_frame *fp = (struct fc_frame *)skb;
1194         struct fnic *fnic = vnic_dev_priv(wq->vdev);
1195
1196         pci_unmap_single(fnic->pdev, buf->dma_addr,
1197                          buf->len, PCI_DMA_TODEVICE);
1198         dev_kfree_skb_irq(fp_skb(fp));
1199         buf->os_buf = NULL;
1200 }
1201
1202 static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev,
1203                                      struct cq_desc *cq_desc, u8 type,
1204                                      u16 q_number, u16 completed_index,
1205                                      void *opaque)
1206 {
1207         struct fnic *fnic = vnic_dev_priv(vdev);
1208         unsigned long flags;
1209
1210         spin_lock_irqsave(&fnic->wq_lock[q_number], flags);
1211         vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index,
1212                         fnic_wq_complete_frame_send, NULL);
1213         spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags);
1214
1215         return 0;
1216 }
1217
1218 int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do)
1219 {
1220         unsigned int wq_work_done = 0;
1221         unsigned int i;
1222
1223         for (i = 0; i < fnic->raw_wq_count; i++) {
1224                 wq_work_done  += vnic_cq_service(&fnic->cq[fnic->rq_count+i],
1225                                                  work_to_do,
1226                                                  fnic_wq_cmpl_handler_cont,
1227                                                  NULL);
1228         }
1229
1230         return wq_work_done;
1231 }
1232
1233
1234 void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
1235 {
1236         struct fc_frame *fp = buf->os_buf;
1237         struct fnic *fnic = vnic_dev_priv(wq->vdev);
1238
1239         pci_unmap_single(fnic->pdev, buf->dma_addr,
1240                          buf->len, PCI_DMA_TODEVICE);
1241
1242         dev_kfree_skb(fp_skb(fp));
1243         buf->os_buf = NULL;
1244 }
1245
1246 void fnic_fcoe_reset_vlans(struct fnic *fnic)
1247 {
1248         unsigned long flags;
1249         struct fcoe_vlan *vlan;
1250         struct fcoe_vlan *next;
1251
1252         /*
1253          * indicate a link down to fcoe so that all fcf's are free'd
1254          * might not be required since we did this before sending vlan
1255          * discovery request
1256          */
1257         spin_lock_irqsave(&fnic->vlans_lock, flags);
1258         if (!list_empty(&fnic->vlans)) {
1259                 list_for_each_entry_safe(vlan, next, &fnic->vlans, list) {
1260                         list_del(&vlan->list);
1261                         kfree(vlan);
1262                 }
1263         }
1264         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1265 }
1266
1267 void fnic_handle_fip_timer(struct fnic *fnic)
1268 {
1269         unsigned long flags;
1270         struct fcoe_vlan *vlan;
1271         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1272         u64 sol_time;
1273
1274         spin_lock_irqsave(&fnic->fnic_lock, flags);
1275         if (fnic->stop_rx_link_events) {
1276                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1277                 return;
1278         }
1279         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1280
1281         if (fnic->ctlr.mode == FIP_ST_NON_FIP)
1282                 return;
1283
1284         spin_lock_irqsave(&fnic->vlans_lock, flags);
1285         if (list_empty(&fnic->vlans)) {
1286                 /* no vlans available, try again */
1287                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1288                           "Start VLAN Discovery\n");
1289                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1290                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1291                 return;
1292         }
1293
1294         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
1295         shost_printk(KERN_DEBUG, fnic->lport->host,
1296                   "fip_timer: vlan %d state %d sol_count %d\n",
1297                   vlan->vid, vlan->state, vlan->sol_count);
1298         switch (vlan->state) {
1299         case FIP_VLAN_USED:
1300                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1301                           "FIP VLAN is selected for FC transaction\n");
1302                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1303                 break;
1304         case FIP_VLAN_FAILED:
1305                 /* if all vlans are in failed state, restart vlan disc */
1306                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1307                           "Start VLAN Discovery\n");
1308                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1309                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1310                 break;
1311         case FIP_VLAN_SENT:
1312                 if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) {
1313                         /*
1314                          * no response on this vlan, remove  from the list.
1315                          * Try the next vlan
1316                          */
1317                         shost_printk(KERN_INFO, fnic->lport->host,
1318                                   "Dequeue this VLAN ID %d from list\n",
1319                                   vlan->vid);
1320                         list_del(&vlan->list);
1321                         kfree(vlan);
1322                         vlan = NULL;
1323                         if (list_empty(&fnic->vlans)) {
1324                                 /* we exhausted all vlans, restart vlan disc */
1325                                 spin_unlock_irqrestore(&fnic->vlans_lock,
1326                                                         flags);
1327                                 shost_printk(KERN_INFO, fnic->lport->host,
1328                                           "fip_timer: vlan list empty, "
1329                                           "trigger vlan disc\n");
1330                                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1331                                 return;
1332                         }
1333                         /* check the next vlan */
1334                         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan,
1335                                                         list);
1336                         fnic->set_vlan(fnic, vlan->vid);
1337                         vlan->state = FIP_VLAN_SENT; /* sent now */
1338                 }
1339                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1340                 atomic64_inc(&fnic_stats->vlan_stats.sol_expiry_count);
1341                 vlan->sol_count++;
1342                 sol_time = jiffies + msecs_to_jiffies
1343                                         (FCOE_CTLR_START_DELAY);
1344                 mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
1345                 break;
1346         }
1347 }