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         switch (vnic_dev_port_speed(fnic->vdev)) {
  69         case DCEM_PORTSPEED_10G:
  70                 fc_host_speed(fnic->lport->host)   = FC_PORTSPEED_10GBIT;
  71                 fnic->lport->link_supported_speeds = FC_PORTSPEED_10GBIT;
  72                 break;
  73         case DCEM_PORTSPEED_25G:
  74                 fc_host_speed(fnic->lport->host)   = FC_PORTSPEED_25GBIT;
  75                 fnic->lport->link_supported_speeds = FC_PORTSPEED_25GBIT;
  76                 break;
  77         case DCEM_PORTSPEED_40G:
  78         case DCEM_PORTSPEED_4x10G:
  79                 fc_host_speed(fnic->lport->host)   = FC_PORTSPEED_40GBIT;
  80                 fnic->lport->link_supported_speeds = FC_PORTSPEED_40GBIT;
  81                 break;
  82         case DCEM_PORTSPEED_100G:
  83                 fc_host_speed(fnic->lport->host)   = FC_PORTSPEED_100GBIT;
  84                 fnic->lport->link_supported_speeds = FC_PORTSPEED_100GBIT;
  85                 break;
  86         default:
  87                 fc_host_speed(fnic->lport->host)   = FC_PORTSPEED_UNKNOWN;
  88                 fnic->lport->link_supported_speeds = FC_PORTSPEED_UNKNOWN;
  89                 break;
  90         }
  91
  92         if (old_link_status == fnic->link_status) {
  93                 if (!fnic->link_status) {
  94                         /* DOWN -> DOWN */
  95                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
  96                         fnic_fc_trace_set_data(fnic->lport->host->host_no,
  97                                 FNIC_FC_LE, "Link Status: DOWN->DOWN",
  98                                 strlen("Link Status: DOWN->DOWN"));
  99                 } else {
 100                         if (old_link_down_cnt != fnic->link_down_cnt) {
 101                                 /* UP -> DOWN -> UP */
 102                                 fnic->lport->host_stats.link_failure_count++;
 103                                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 104                                 fnic_fc_trace_set_data(
 105                                         fnic->lport->host->host_no,
 106                                         FNIC_FC_LE,
 107                                         "Link Status:UP_DOWN_UP",
 108                                         strlen("Link_Status:UP_DOWN_UP")
 109                                         );
 110                                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 111                                              "link down\n");
 112                                 fcoe_ctlr_link_down(&fnic->ctlr);
 113                                 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
 114                                         /* start FCoE VLAN discovery */
 115                                         fnic_fc_trace_set_data(
 116                                                 fnic->lport->host->host_no,
 117                                                 FNIC_FC_LE,
 118                                                 "Link Status: UP_DOWN_UP_VLAN",
 119                                                 strlen(
 120                                                 "Link Status: UP_DOWN_UP_VLAN")
 121                                                 );
 122                                         fnic_fcoe_send_vlan_req(fnic);
 123                                         return;
 124                                 }
 125                                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 126                                              "link up\n");
 127                                 fcoe_ctlr_link_up(&fnic->ctlr);
 128                         } else {
 129                                 /* UP -> UP */
 130                                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 131                                 fnic_fc_trace_set_data(
 132                                         fnic->lport->host->host_no, FNIC_FC_LE,
 133                                         "Link Status: UP_UP",
 134                                         strlen("Link Status: UP_UP"));
 135                         }
 136                 }
 137         } else if (fnic->link_status) {
 138                 /* DOWN -> UP */
 139                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 140                 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
 141                         /* start FCoE VLAN discovery */
 142                                 fnic_fc_trace_set_data(
 143                                 fnic->lport->host->host_no,
 144                                 FNIC_FC_LE, "Link Status: DOWN_UP_VLAN",
 145                                 strlen("Link Status: DOWN_UP_VLAN"));
 146                         fnic_fcoe_send_vlan_req(fnic);
 147                         return;
 148                 }
 149                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n");
 150                 fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_LE,
 151                         "Link Status: DOWN_UP", strlen("Link Status: DOWN_UP"));
 152                 fcoe_ctlr_link_up(&fnic->ctlr);
 153         } else {
 154                 /* UP -> DOWN */
 155                 fnic->lport->host_stats.link_failure_count++;
 156                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 157                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link down\n");
 158                 fnic_fc_trace_set_data(
 159                         fnic->lport->host->host_no, FNIC_FC_LE,
 160                         "Link Status: UP_DOWN",
 161                         strlen("Link Status: UP_DOWN"));
 162                 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
 163                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 164                                 "deleting fip-timer during link-down\n");
 165                         del_timer_sync(&fnic->fip_timer);
 166                 }
 167                 fcoe_ctlr_link_down(&fnic->ctlr);
 168         }
 169
 170 }
 171
 172 /*
 173  * This function passes incoming fabric frames to libFC
 174  */
 175 void fnic_handle_frame(struct work_struct *work)
 176 {
 177         struct fnic *fnic = container_of(work, struct fnic, frame_work);
 178         struct fc_lport *lp = fnic->lport;
 179         unsigned long flags;
 180         struct sk_buff *skb;
 181         struct fc_frame *fp;
 182
 183         while ((skb = skb_dequeue(&fnic->frame_queue))) {
 184
 185                 spin_lock_irqsave(&fnic->fnic_lock, flags);
 186                 if (fnic->stop_rx_link_events) {
 187                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 188                         dev_kfree_skb(skb);
 189                         return;
 190                 }
 191                 fp = (struct fc_frame *)skb;
 192
 193                 /*
 194                  * If we're in a transitional state, just re-queue and return.
 195                  * The queue will be serviced when we get to a stable state.
 196                  */
 197                 if (fnic->state != FNIC_IN_FC_MODE &&
 198                     fnic->state != FNIC_IN_ETH_MODE) {
 199                         skb_queue_head(&fnic->frame_queue, skb);
 200                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 201                         return;
 202                 }
 203                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 204
 205                 fc_exch_recv(lp, fp);
 206         }
 207 }
 208
 209 void fnic_fcoe_evlist_free(struct fnic *fnic)
 210 {
 211         struct fnic_event *fevt = NULL;
 212         struct fnic_event *next = NULL;
 213         unsigned long flags;
 214
 215         spin_lock_irqsave(&fnic->fnic_lock, flags);
 216         if (list_empty(&fnic->evlist)) {
 217                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 218                 return;
 219         }
 220
 221         list_for_each_entry_safe(fevt, next, &fnic->evlist, list) {
 222                 list_del(&fevt->list);
 223                 kfree(fevt);
 224         }
 225         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 226 }
 227
 228 void fnic_handle_event(struct work_struct *work)
 229 {
 230         struct fnic *fnic = container_of(work, struct fnic, event_work);
 231         struct fnic_event *fevt = NULL;
 232         struct fnic_event *next = NULL;
 233         unsigned long flags;
 234
 235         spin_lock_irqsave(&fnic->fnic_lock, flags);
 236         if (list_empty(&fnic->evlist)) {
 237                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 238                 return;
 239         }
 240
 241         list_for_each_entry_safe(fevt, next, &fnic->evlist, list) {
 242                 if (fnic->stop_rx_link_events) {
 243                         list_del(&fevt->list);
 244                         kfree(fevt);
 245                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 246                         return;
 247                 }
 248                 /*
 249                  * If we're in a transitional state, just re-queue and return.
 250                  * The queue will be serviced when we get to a stable state.
 251                  */
 252                 if (fnic->state != FNIC_IN_FC_MODE &&
 253                     fnic->state != FNIC_IN_ETH_MODE) {
 254                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 255                         return;
 256                 }
 257
 258                 list_del(&fevt->list);
 259                 switch (fevt->event) {
 260                 case FNIC_EVT_START_VLAN_DISC:
 261                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 262                         fnic_fcoe_send_vlan_req(fnic);
 263                         spin_lock_irqsave(&fnic->fnic_lock, flags);
 264                         break;
 265                 case FNIC_EVT_START_FCF_DISC:
 266                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 267                                   "Start FCF Discovery\n");
 268                         fnic_fcoe_start_fcf_disc(fnic);
 269                         break;
 270                 default:
 271                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 272                                   "Unknown event 0x%x\n", fevt->event);
 273                         break;
 274                 }
 275                 kfree(fevt);
 276         }
 277         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 278 }
 279
 280 /**
 281  * Check if the Received FIP FLOGI frame is rejected
 282  * @fip: The FCoE controller that received the frame
 283  * @skb: The received FIP frame
 284  *
 285  * Returns non-zero if the frame is rejected with unsupported cmd with
 286  * insufficient resource els explanation.
 287  */
 288 static inline int is_fnic_fip_flogi_reject(struct fcoe_ctlr *fip,
 289                                          struct sk_buff *skb)
 290 {
 291         struct fc_lport *lport = fip->lp;
 292         struct fip_header *fiph;
 293         struct fc_frame_header *fh = NULL;
 294         struct fip_desc *desc;
 295         struct fip_encaps *els;
 296         enum fip_desc_type els_dtype = 0;
 297         u16 op;
 298         u8 els_op;
 299         u8 sub;
 300
 301         size_t els_len = 0;
 302         size_t rlen;
 303         size_t dlen = 0;
 304
 305         if (skb_linearize(skb))
 306                 return 0;
 307
 308         if (skb->len < sizeof(*fiph))
 309                 return 0;
 310
 311         fiph = (struct fip_header *)skb->data;
 312         op = ntohs(fiph->fip_op);
 313         sub = fiph->fip_subcode;
 314
 315         if (op != FIP_OP_LS)
 316                 return 0;
 317
 318         if (sub != FIP_SC_REP)
 319                 return 0;
 320
 321         rlen = ntohs(fiph->fip_dl_len) * 4;
 322         if (rlen + sizeof(*fiph) > skb->len)
 323                 return 0;
 324
 325         desc = (struct fip_desc *)(fiph + 1);
 326         dlen = desc->fip_dlen * FIP_BPW;
 327
 328         if (desc->fip_dtype == FIP_DT_FLOGI) {
 329
 330                 if (dlen < sizeof(*els) + sizeof(*fh) + 1)
 331                         return 0;
 332
 333                 els_len = dlen - sizeof(*els);
 334                 els = (struct fip_encaps *)desc;
 335                 fh = (struct fc_frame_header *)(els + 1);
 336                 els_dtype = desc->fip_dtype;
 337
 338                 if (!fh)
 339                         return 0;
 340
 341                 /*
 342                  * ELS command code, reason and explanation should be = Reject,
 343                  * unsupported command and insufficient resource
 344                  */
 345                 els_op = *(u8 *)(fh + 1);
 346                 if (els_op == ELS_LS_RJT) {
 347                         shost_printk(KERN_INFO, lport->host,
 348                                   "Flogi Request Rejected by Switch\n");
 349                         return 1;
 350                 }
 351                 shost_printk(KERN_INFO, lport->host,
 352                                 "Flogi Request Accepted by Switch\n");
 353         }
 354         return 0;
 355 }
 356
 357 static void fnic_fcoe_send_vlan_req(struct fnic *fnic)
 358 {
 359         struct fcoe_ctlr *fip = &fnic->ctlr;
 360         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 361         struct sk_buff *skb;
 362         char *eth_fr;
 363         int fr_len;
 364         struct fip_vlan *vlan;
 365         u64 vlan_tov;
 366
 367         fnic_fcoe_reset_vlans(fnic);
 368         fnic->set_vlan(fnic, 0);
 369
 370         if (printk_ratelimit())
 371                 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 372                           "Sending VLAN request...\n");
 373
 374         skb = dev_alloc_skb(sizeof(struct fip_vlan));
 375         if (!skb)
 376                 return;
 377
 378         fr_len = sizeof(*vlan);
 379         eth_fr = (char *)skb->data;
 380         vlan = (struct fip_vlan *)eth_fr;
 381
 382         memset(vlan, 0, sizeof(*vlan));
 383         memcpy(vlan->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
 384         memcpy(vlan->eth.h_dest, fcoe_all_fcfs, ETH_ALEN);
 385         vlan->eth.h_proto = htons(ETH_P_FIP);
 386
 387         vlan->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
 388         vlan->fip.fip_op = htons(FIP_OP_VLAN);
 389         vlan->fip.fip_subcode = FIP_SC_VL_REQ;
 390         vlan->fip.fip_dl_len = htons(sizeof(vlan->desc) / FIP_BPW);
 391
 392         vlan->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
 393         vlan->desc.mac.fd_desc.fip_dlen = sizeof(vlan->desc.mac) / FIP_BPW;
 394         memcpy(&vlan->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
 395
 396         vlan->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
 397         vlan->desc.wwnn.fd_desc.fip_dlen = sizeof(vlan->desc.wwnn) / FIP_BPW;
 398         put_unaligned_be64(fip->lp->wwnn, &vlan->desc.wwnn.fd_wwn);
 399         atomic64_inc(&fnic_stats->vlan_stats.vlan_disc_reqs);
 400
 401         skb_put(skb, sizeof(*vlan));
 402         skb->protocol = htons(ETH_P_FIP);
 403         skb_reset_mac_header(skb);
 404         skb_reset_network_header(skb);
 405         fip->send(fip, skb);
 406
 407         /* set a timer so that we can retry if there no response */
 408         vlan_tov = jiffies + msecs_to_jiffies(FCOE_CTLR_FIPVLAN_TOV);
 409         mod_timer(&fnic->fip_timer, round_jiffies(vlan_tov));
 410 }
 411
 412 static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *skb)
 413 {
 414         struct fcoe_ctlr *fip = &fnic->ctlr;
 415         struct fip_header *fiph;
 416         struct fip_desc *desc;
 417         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 418         u16 vid;
 419         size_t rlen;
 420         size_t dlen;
 421         struct fcoe_vlan *vlan;
 422         u64 sol_time;
 423         unsigned long flags;
 424
 425         FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 426                   "Received VLAN response...\n");
 427
 428         fiph = (struct fip_header *) skb->data;
 429
 430         FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 431                   "Received VLAN response... OP 0x%x SUB_OP 0x%x\n",
 432                   ntohs(fiph->fip_op), fiph->fip_subcode);
 433
 434         rlen = ntohs(fiph->fip_dl_len) * 4;
 435         fnic_fcoe_reset_vlans(fnic);
 436         spin_lock_irqsave(&fnic->vlans_lock, flags);
 437         desc = (struct fip_desc *)(fiph + 1);
 438         while (rlen > 0) {
 439                 dlen = desc->fip_dlen * FIP_BPW;
 440                 switch (desc->fip_dtype) {
 441                 case FIP_DT_VLAN:
 442                         vid = ntohs(((struct fip_vlan_desc *)desc)->fd_vlan);
 443                         shost_printk(KERN_INFO, fnic->lport->host,
 444                                   "process_vlan_resp: FIP VLAN %d\n", vid);
 445                         vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
 446                         if (!vlan) {
 447                                 /* retry from timer */
 448                                 spin_unlock_irqrestore(&fnic->vlans_lock,
 449                                                         flags);
 450                                 goto out;
 451                         }
 452                         vlan->vid = vid & 0x0fff;
 453                         vlan->state = FIP_VLAN_AVAIL;
 454                         list_add_tail(&vlan->list, &fnic->vlans);
 455                         break;
 456                 }
 457                 desc = (struct fip_desc *)((char *)desc + dlen);
 458                 rlen -= dlen;
 459         }
 460
 461         /* any VLAN descriptors present ? */
 462         if (list_empty(&fnic->vlans)) {
 463                 /* retry from timer */
 464                 atomic64_inc(&fnic_stats->vlan_stats.resp_withno_vlanID);
 465                 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 466                           "No VLAN descriptors in FIP VLAN response\n");
 467                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 468                 goto out;
 469         }
 470
 471         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
 472         fnic->set_vlan(fnic, vlan->vid);
 473         vlan->state = FIP_VLAN_SENT; /* sent now */
 474         vlan->sol_count++;
 475         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 476
 477         /* start the solicitation */
 478         fcoe_ctlr_link_up(fip);
 479
 480         sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
 481         mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
 482 out:
 483         return;
 484 }
 485
 486 static void fnic_fcoe_start_fcf_disc(struct fnic *fnic)
 487 {
 488         unsigned long flags;
 489         struct fcoe_vlan *vlan;
 490         u64 sol_time;
 491
 492         spin_lock_irqsave(&fnic->vlans_lock, flags);
 493         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
 494         fnic->set_vlan(fnic, vlan->vid);
 495         vlan->state = FIP_VLAN_SENT; /* sent now */
 496         vlan->sol_count = 1;
 497         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 498
 499         /* start the solicitation */
 500         fcoe_ctlr_link_up(&fnic->ctlr);
 501
 502         sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
 503         mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
 504 }
 505
 506 static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag)
 507 {
 508         unsigned long flags;
 509         struct fcoe_vlan *fvlan;
 510
 511         spin_lock_irqsave(&fnic->vlans_lock, flags);
 512         if (list_empty(&fnic->vlans)) {
 513                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 514                 return -EINVAL;
 515         }
 516
 517         fvlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
 518         if (fvlan->state == FIP_VLAN_USED) {
 519                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 520                 return 0;
 521         }
 522
 523         if (fvlan->state == FIP_VLAN_SENT) {
 524                 fvlan->state = FIP_VLAN_USED;
 525                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 526                 return 0;
 527         }
 528         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 529         return -EINVAL;
 530 }
 531
 532 static void fnic_event_enq(struct fnic *fnic, enum fnic_evt ev)
 533 {
 534         struct fnic_event *fevt;
 535         unsigned long flags;
 536
 537         fevt = kmalloc(sizeof(*fevt), GFP_ATOMIC);
 538         if (!fevt)
 539                 return;
 540
 541         fevt->fnic = fnic;
 542         fevt->event = ev;
 543
 544         spin_lock_irqsave(&fnic->fnic_lock, flags);
 545         list_add_tail(&fevt->list, &fnic->evlist);
 546         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 547
 548         schedule_work(&fnic->event_work);
 549 }
 550
 551 static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb)
 552 {
 553         struct fip_header *fiph;
 554         int ret = 1;
 555         u16 op;
 556         u8 sub;
 557
 558         if (!skb || !(skb->data))
 559                 return -1;
 560
 561         if (skb_linearize(skb))
 562                 goto drop;
 563
 564         fiph = (struct fip_header *)skb->data;
 565         op = ntohs(fiph->fip_op);
 566         sub = fiph->fip_subcode;
 567
 568         if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
 569                 goto drop;
 570
 571         if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
 572                 goto drop;
 573
 574         if (op == FIP_OP_DISC && sub == FIP_SC_ADV) {
 575                 if (fnic_fcoe_vlan_check(fnic, ntohs(fiph->fip_flags)))
 576                         goto drop;
 577                 /* pass it on to fcoe */
 578                 ret = 1;
 579         } else if (op == FIP_OP_VLAN && sub == FIP_SC_VL_NOTE) {
 580                 /* set the vlan as used */
 581                 fnic_fcoe_process_vlan_resp(fnic, skb);
 582                 ret = 0;
 583         } else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) {
 584                 /* received CVL request, restart vlan disc */
 585                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
 586                 /* pass it on to fcoe */
 587                 ret = 1;
 588         }
 589 drop:
 590         return ret;
 591 }
 592
 593 void fnic_handle_fip_frame(struct work_struct *work)
 594 {
 595         struct fnic *fnic = container_of(work, struct fnic, fip_frame_work);
 596         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 597         unsigned long flags;
 598         struct sk_buff *skb;
 599         struct ethhdr *eh;
 600
 601         while ((skb = skb_dequeue(&fnic->fip_frame_queue))) {
 602                 spin_lock_irqsave(&fnic->fnic_lock, flags);
 603                 if (fnic->stop_rx_link_events) {
 604                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 605                         dev_kfree_skb(skb);
 606                         return;
 607                 }
 608                 /*
 609                  * If we're in a transitional state, just re-queue and return.
 610                  * The queue will be serviced when we get to a stable state.
 611                  */
 612                 if (fnic->state != FNIC_IN_FC_MODE &&
 613                     fnic->state != FNIC_IN_ETH_MODE) {
 614                         skb_queue_head(&fnic->fip_frame_queue, skb);
 615                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 616                         return;
 617                 }
 618                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 619                 eh = (struct ethhdr *)skb->data;
 620                 if (eh->h_proto == htons(ETH_P_FIP)) {
 621                         skb_pull(skb, sizeof(*eh));
 622                         if (fnic_fcoe_handle_fip_frame(fnic, skb) <= 0) {
 623                                 dev_kfree_skb(skb);
 624                                 continue;
 625                         }
 626                         /*
 627                          * If there's FLOGI rejects - clear all
 628                          * fcf's & restart from scratch
 629                          */
 630                         if (is_fnic_fip_flogi_reject(&fnic->ctlr, skb)) {
 631                                 atomic64_inc(
 632                                         &fnic_stats->vlan_stats.flogi_rejects);
 633                                 shost_printk(KERN_INFO, fnic->lport->host,
 634                                           "Trigger a Link down - VLAN Disc\n");
 635                                 fcoe_ctlr_link_down(&fnic->ctlr);
 636                                 /* start FCoE VLAN discovery */
 637                                 fnic_fcoe_send_vlan_req(fnic);
 638                                 dev_kfree_skb(skb);
 639                                 continue;
 640                         }
 641                         fcoe_ctlr_recv(&fnic->ctlr, skb);
 642                         continue;
 643                 }
 644         }
 645 }
 646
 647 /**
 648  * fnic_import_rq_eth_pkt() - handle received FCoE or FIP frame.
 649  * @fnic:       fnic instance.
 650  * @skb:        Ethernet Frame.
 651  */
 652 static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb)
 653 {
 654         struct fc_frame *fp;
 655         struct ethhdr *eh;
 656         struct fcoe_hdr *fcoe_hdr;
 657         struct fcoe_crc_eof *ft;
 658
 659         /*
 660          * Undo VLAN encapsulation if present.
 661          */
 662         eh = (struct ethhdr *)skb->data;
 663         if (eh->h_proto == htons(ETH_P_8021Q)) {
 664                 memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
 665                 eh = skb_pull(skb, VLAN_HLEN);
 666                 skb_reset_mac_header(skb);
 667         }
 668         if (eh->h_proto == htons(ETH_P_FIP)) {
 669                 if (!(fnic->config.flags & VFCF_FIP_CAPABLE)) {
 670                         printk(KERN_ERR "Dropped FIP frame, as firmware "
 671                                         "uses non-FIP mode, Enable FIP "
 672                                         "using UCSM\n");
 673                         goto drop;
 674                 }
 675                 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
 676                         FNIC_FC_RECV|0x80, (char *)skb->data, skb->len)) != 0) {
 677                         printk(KERN_ERR "fnic ctlr frame trace error!!!");
 678                 }
 679                 skb_queue_tail(&fnic->fip_frame_queue, skb);
 680                 queue_work(fnic_fip_queue, &fnic->fip_frame_work);
 681                 return 1;               /* let caller know packet was used */
 682         }
 683         if (eh->h_proto != htons(ETH_P_FCOE))
 684                 goto drop;
 685         skb_set_network_header(skb, sizeof(*eh));
 686         skb_pull(skb, sizeof(*eh));
 687
 688         fcoe_hdr = (struct fcoe_hdr *)skb->data;
 689         if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER)
 690                 goto drop;
 691
 692         fp = (struct fc_frame *)skb;
 693         fc_frame_init(fp);
 694         fr_sof(fp) = fcoe_hdr->fcoe_sof;
 695         skb_pull(skb, sizeof(struct fcoe_hdr));
 696         skb_reset_transport_header(skb);
 697
 698         ft = (struct fcoe_crc_eof *)(skb->data + skb->len - sizeof(*ft));
 699         fr_eof(fp) = ft->fcoe_eof;
 700         skb_trim(skb, skb->len - sizeof(*ft));
 701         return 0;
 702 drop:
 703         dev_kfree_skb_irq(skb);
 704         return -1;
 705 }
 706
 707 /**
 708  * fnic_update_mac_locked() - set data MAC address and filters.
 709  * @fnic:       fnic instance.
 710  * @new:        newly-assigned FCoE MAC address.
 711  *
 712  * Called with the fnic lock held.
 713  */
 714 void fnic_update_mac_locked(struct fnic *fnic, u8 *new)
 715 {
 716         u8 *ctl = fnic->ctlr.ctl_src_addr;
 717         u8 *data = fnic->data_src_addr;
 718
 719         if (is_zero_ether_addr(new))
 720                 new = ctl;
 721         if (ether_addr_equal(data, new))
 722                 return;
 723         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n", new);
 724         if (!is_zero_ether_addr(data) && !ether_addr_equal(data, ctl))
 725                 vnic_dev_del_addr(fnic->vdev, data);
 726         memcpy(data, new, ETH_ALEN);
 727         if (!ether_addr_equal(new, ctl))
 728                 vnic_dev_add_addr(fnic->vdev, new);
 729 }
 730
 731 /**
 732  * fnic_update_mac() - set data MAC address and filters.
 733  * @lport:      local port.
 734  * @new:        newly-assigned FCoE MAC address.
 735  */
 736 void fnic_update_mac(struct fc_lport *lport, u8 *new)
 737 {
 738         struct fnic *fnic = lport_priv(lport);
 739
 740         spin_lock_irq(&fnic->fnic_lock);
 741         fnic_update_mac_locked(fnic, new);
 742         spin_unlock_irq(&fnic->fnic_lock);
 743 }
 744
 745 /**
 746  * fnic_set_port_id() - set the port_ID after successful FLOGI.
 747  * @lport:      local port.
 748  * @port_id:    assigned FC_ID.
 749  * @fp:         received frame containing the FLOGI accept or NULL.
 750  *
 751  * This is called from libfc when a new FC_ID has been assigned.
 752  * This causes us to reset the firmware to FC_MODE and setup the new MAC
 753  * address and FC_ID.
 754  *
 755  * It is also called with FC_ID 0 when we're logged off.
 756  *
 757  * If the FC_ID is due to point-to-point, fp may be NULL.
 758  */
 759 void fnic_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp)
 760 {
 761         struct fnic *fnic = lport_priv(lport);
 762         u8 *mac;
 763         int ret;
 764
 765         FNIC_FCS_DBG(KERN_DEBUG, lport->host, "set port_id %x fp %p\n",
 766                      port_id, fp);
 767
 768         /*
 769          * If we're clearing the FC_ID, change to use the ctl_src_addr.
 770          * Set ethernet mode to send FLOGI.
 771          */
 772         if (!port_id) {
 773                 fnic_update_mac(lport, fnic->ctlr.ctl_src_addr);
 774                 fnic_set_eth_mode(fnic);
 775                 return;
 776         }
 777
 778         if (fp) {
 779                 mac = fr_cb(fp)->granted_mac;
 780                 if (is_zero_ether_addr(mac)) {
 781                         /* non-FIP - FLOGI already accepted - ignore return */
 782                         fcoe_ctlr_recv_flogi(&fnic->ctlr, lport, fp);
 783                 }
 784                 fnic_update_mac(lport, mac);
 785         }
 786
 787         /* Change state to reflect transition to FC mode */
 788         spin_lock_irq(&fnic->fnic_lock);
 789         if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE)
 790                 fnic->state = FNIC_IN_ETH_TRANS_FC_MODE;
 791         else {
 792                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 793                              "Unexpected fnic state %s while"
 794                              " processing flogi resp\n",
 795                              fnic_state_to_str(fnic->state));
 796                 spin_unlock_irq(&fnic->fnic_lock);
 797                 return;
 798         }
 799         spin_unlock_irq(&fnic->fnic_lock);
 800
 801         /*
 802          * Send FLOGI registration to firmware to set up FC mode.
 803          * The new address will be set up when registration completes.
 804          */
 805         ret = fnic_flogi_reg_handler(fnic, port_id);
 806
 807         if (ret < 0) {
 808                 spin_lock_irq(&fnic->fnic_lock);
 809                 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE)
 810                         fnic->state = FNIC_IN_ETH_MODE;
 811                 spin_unlock_irq(&fnic->fnic_lock);
 812         }
 813 }
 814
 815 static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc
 816                                     *cq_desc, struct vnic_rq_buf *buf,
 817                                     int skipped __attribute__((unused)),
 818                                     void *opaque)
 819 {
 820         struct fnic *fnic = vnic_dev_priv(rq->vdev);
 821         struct sk_buff *skb;
 822         struct fc_frame *fp;
 823         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 824         unsigned int eth_hdrs_stripped;
 825         u8 type, color, eop, sop, ingress_port, vlan_stripped;
 826         u8 fcoe = 0, fcoe_sof, fcoe_eof;
 827         u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0;
 828         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
 829         u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc;
 830         u8 fcs_ok = 1, packet_error = 0;
 831         u16 q_number, completed_index, bytes_written = 0, vlan, checksum;
 832         u32 rss_hash;
 833         u16 exchange_id, tmpl;
 834         u8 sof = 0;
 835         u8 eof = 0;
 836         u32 fcp_bytes_written = 0;
 837         unsigned long flags;
 838
 839         dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len,
 840                          DMA_FROM_DEVICE);
 841         skb = buf->os_buf;
 842         fp = (struct fc_frame *)skb;
 843         buf->os_buf = NULL;
 844
 845         cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index);
 846         if (type == CQ_DESC_TYPE_RQ_FCP) {
 847                 cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc,
 848                                    &type, &color, &q_number, &completed_index,
 849                                    &eop, &sop, &fcoe_fc_crc_ok, &exchange_id,
 850                                    &tmpl, &fcp_bytes_written, &sof, &eof,
 851                                    &ingress_port, &packet_error,
 852                                    &fcoe_enc_error, &fcs_ok, &vlan_stripped,
 853                                    &vlan);
 854                 eth_hdrs_stripped = 1;
 855                 skb_trim(skb, fcp_bytes_written);
 856                 fr_sof(fp) = sof;
 857                 fr_eof(fp) = eof;
 858
 859         } else if (type == CQ_DESC_TYPE_RQ_ENET) {
 860                 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
 861                                     &type, &color, &q_number, &completed_index,
 862                                     &ingress_port, &fcoe, &eop, &sop,
 863                                     &rss_type, &csum_not_calc, &rss_hash,
 864                                     &bytes_written, &packet_error,
 865                                     &vlan_stripped, &vlan, &checksum,
 866                                     &fcoe_sof, &fcoe_fc_crc_ok,
 867                                     &fcoe_enc_error, &fcoe_eof,
 868                                     &tcp_udp_csum_ok, &udp, &tcp,
 869                                     &ipv4_csum_ok, &ipv6, &ipv4,
 870                                     &ipv4_fragment, &fcs_ok);
 871                 eth_hdrs_stripped = 0;
 872                 skb_trim(skb, bytes_written);
 873                 if (!fcs_ok) {
 874                         atomic64_inc(&fnic_stats->misc_stats.frame_errors);
 875                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 876                                      "fcs error.  dropping packet.\n");
 877                         goto drop;
 878                 }
 879                 if (fnic_import_rq_eth_pkt(fnic, skb))
 880                         return;
 881
 882         } else {
 883                 /* wrong CQ type*/
 884                 shost_printk(KERN_ERR, fnic->lport->host,
 885                              "fnic rq_cmpl wrong cq type x%x\n", type);
 886                 goto drop;
 887         }
 888
 889         if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) {
 890                 atomic64_inc(&fnic_stats->misc_stats.frame_errors);
 891                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 892                              "fnic rq_cmpl fcoe x%x fcsok x%x"
 893                              " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err"
 894                              " x%x\n",
 895                              fcoe, fcs_ok, packet_error,
 896                              fcoe_fc_crc_ok, fcoe_enc_error);
 897                 goto drop;
 898         }
 899
 900         spin_lock_irqsave(&fnic->fnic_lock, flags);
 901         if (fnic->stop_rx_link_events) {
 902                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 903                 goto drop;
 904         }
 905         fr_dev(fp) = fnic->lport;
 906         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 907         if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_RECV,
 908                                         (char *)skb->data, skb->len)) != 0) {
 909                 printk(KERN_ERR "fnic ctlr frame trace error!!!");
 910         }
 911
 912         skb_queue_tail(&fnic->frame_queue, skb);
 913         queue_work(fnic_event_queue, &fnic->frame_work);
 914
 915         return;
 916 drop:
 917         dev_kfree_skb_irq(skb);
 918 }
 919
 920 static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev,
 921                                      struct cq_desc *cq_desc, u8 type,
 922                                      u16 q_number, u16 completed_index,
 923                                      void *opaque)
 924 {
 925         struct fnic *fnic = vnic_dev_priv(vdev);
 926
 927         vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index,
 928                         VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv,
 929                         NULL);
 930         return 0;
 931 }
 932
 933 int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do)
 934 {
 935         unsigned int tot_rq_work_done = 0, cur_work_done;
 936         unsigned int i;
 937         int err;
 938
 939         for (i = 0; i < fnic->rq_count; i++) {
 940                 cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do,
 941                                                 fnic_rq_cmpl_handler_cont,
 942                                                 NULL);
 943                 if (cur_work_done) {
 944                         err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
 945                         if (err)
 946                                 shost_printk(KERN_ERR, fnic->lport->host,
 947                                              "fnic_alloc_rq_frame can't alloc"
 948                                              " frame\n");
 949                 }
 950                 tot_rq_work_done += cur_work_done;
 951         }
 952
 953         return tot_rq_work_done;
 954 }
 955
 956 /*
 957  * This function is called once at init time to allocate and fill RQ
 958  * buffers. Subsequently, it is called in the interrupt context after RQ
 959  * buffer processing to replenish the buffers in the RQ
 960  */
 961 int fnic_alloc_rq_frame(struct vnic_rq *rq)
 962 {
 963         struct fnic *fnic = vnic_dev_priv(rq->vdev);
 964         struct sk_buff *skb;
 965         u16 len;
 966         dma_addr_t pa;
 967         int r;
 968
 969         len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM;
 970         skb = dev_alloc_skb(len);
 971         if (!skb) {
 972                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 973                              "Unable to allocate RQ sk_buff\n");
 974                 return -ENOMEM;
 975         }
 976         skb_reset_mac_header(skb);
 977         skb_reset_transport_header(skb);
 978         skb_reset_network_header(skb);
 979         skb_put(skb, len);
 980         pa = dma_map_single(&fnic->pdev->dev, skb->data, len, DMA_FROM_DEVICE);
 981         if (dma_mapping_error(&fnic->pdev->dev, pa)) {
 982                 r = -ENOMEM;
 983                 printk(KERN_ERR "PCI mapping failed with error %d\n", r);
 984                 goto free_skb;
 985         }
 986
 987         fnic_queue_rq_desc(rq, skb, pa, len);
 988         return 0;
 989
 990 free_skb:
 991         kfree_skb(skb);
 992         return r;
 993 }
 994
 995 void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
 996 {
 997         struct fc_frame *fp = buf->os_buf;
 998         struct fnic *fnic = vnic_dev_priv(rq->vdev);
 999
1000         dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len,
1001                          DMA_FROM_DEVICE);
1002
1003         dev_kfree_skb(fp_skb(fp));
1004         buf->os_buf = NULL;
1005 }
1006
1007 /**
1008  * fnic_eth_send() - Send Ethernet frame.
1009  * @fip:        fcoe_ctlr instance.
1010  * @skb:        Ethernet Frame, FIP, without VLAN encapsulation.
1011  */
1012 void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
1013 {
1014         struct fnic *fnic = fnic_from_ctlr(fip);
1015         struct vnic_wq *wq = &fnic->wq[0];
1016         dma_addr_t pa;
1017         struct ethhdr *eth_hdr;
1018         struct vlan_ethhdr *vlan_hdr;
1019         unsigned long flags;
1020
1021         if (!fnic->vlan_hw_insert) {
1022                 eth_hdr = (struct ethhdr *)skb_mac_header(skb);
1023                 vlan_hdr = skb_push(skb, sizeof(*vlan_hdr) - sizeof(*eth_hdr));
1024                 memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN);
1025                 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
1026                 vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto;
1027                 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
1028                 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
1029                         FNIC_FC_SEND|0x80, (char *)eth_hdr, skb->len)) != 0) {
1030                         printk(KERN_ERR "fnic ctlr frame trace error!!!");
1031                 }
1032         } else {
1033                 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
1034                         FNIC_FC_SEND|0x80, (char *)skb->data, skb->len)) != 0) {
1035                         printk(KERN_ERR "fnic ctlr frame trace error!!!");
1036                 }
1037         }
1038
1039         pa = dma_map_single(&fnic->pdev->dev, skb->data, skb->len,
1040                         DMA_TO_DEVICE);
1041         if (dma_mapping_error(&fnic->pdev->dev, pa)) {
1042                 printk(KERN_ERR "DMA mapping failed\n");
1043                 goto free_skb;
1044         }
1045
1046         spin_lock_irqsave(&fnic->wq_lock[0], flags);
1047         if (!vnic_wq_desc_avail(wq))
1048                 goto irq_restore;
1049
1050         fnic_queue_wq_eth_desc(wq, skb, pa, skb->len,
1051                                0 /* hw inserts cos value */,
1052                                fnic->vlan_id, 1);
1053         spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1054         return;
1055
1056 irq_restore:
1057         spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1058         dma_unmap_single(&fnic->pdev->dev, pa, skb->len, DMA_TO_DEVICE);
1059 free_skb:
1060         kfree_skb(skb);
1061 }
1062
1063 /*
1064  * Send FC frame.
1065  */
1066 static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
1067 {
1068         struct vnic_wq *wq = &fnic->wq[0];
1069         struct sk_buff *skb;
1070         dma_addr_t pa;
1071         struct ethhdr *eth_hdr;
1072         struct vlan_ethhdr *vlan_hdr;
1073         struct fcoe_hdr *fcoe_hdr;
1074         struct fc_frame_header *fh;
1075         u32 tot_len, eth_hdr_len;
1076         int ret = 0;
1077         unsigned long flags;
1078
1079         fh = fc_frame_header_get(fp);
1080         skb = fp_skb(fp);
1081
1082         if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
1083             fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb))
1084                 return 0;
1085
1086         if (!fnic->vlan_hw_insert) {
1087                 eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr);
1088                 vlan_hdr = skb_push(skb, eth_hdr_len);
1089                 eth_hdr = (struct ethhdr *)vlan_hdr;
1090                 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
1091                 vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE);
1092                 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
1093                 fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1);
1094         } else {
1095                 eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr);
1096                 eth_hdr = skb_push(skb, eth_hdr_len);
1097                 eth_hdr->h_proto = htons(ETH_P_FCOE);
1098                 fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1);
1099         }
1100
1101         if (fnic->ctlr.map_dest)
1102                 fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
1103         else
1104                 memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN);
1105         memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN);
1106
1107         tot_len = skb->len;
1108         BUG_ON(tot_len % 4);
1109
1110         memset(fcoe_hdr, 0, sizeof(*fcoe_hdr));
1111         fcoe_hdr->fcoe_sof = fr_sof(fp);
1112         if (FC_FCOE_VER)
1113                 FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER);
1114
1115         pa = dma_map_single(&fnic->pdev->dev, eth_hdr, tot_len, DMA_TO_DEVICE);
1116         if (dma_mapping_error(&fnic->pdev->dev, pa)) {
1117                 ret = -ENOMEM;
1118                 printk(KERN_ERR "DMA map failed with error %d\n", ret);
1119                 goto free_skb_on_err;
1120         }
1121
1122         if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_SEND,
1123                                 (char *)eth_hdr, tot_len)) != 0) {
1124                 printk(KERN_ERR "fnic ctlr frame trace error!!!");
1125         }
1126
1127         spin_lock_irqsave(&fnic->wq_lock[0], flags);
1128
1129         if (!vnic_wq_desc_avail(wq)) {
1130                 dma_unmap_single(&fnic->pdev->dev, pa, tot_len, DMA_TO_DEVICE);
1131                 ret = -1;
1132                 goto irq_restore;
1133         }
1134
1135         fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
1136                            0 /* hw inserts cos value */,
1137                            fnic->vlan_id, 1, 1, 1);
1138
1139 irq_restore:
1140         spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1141
1142 free_skb_on_err:
1143         if (ret)
1144                 dev_kfree_skb_any(fp_skb(fp));
1145
1146         return ret;
1147 }
1148
1149 /*
1150  * fnic_send
1151  * Routine to send a raw frame
1152  */
1153 int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
1154 {
1155         struct fnic *fnic = lport_priv(lp);
1156         unsigned long flags;
1157
1158         if (fnic->in_remove) {
1159                 dev_kfree_skb(fp_skb(fp));
1160                 return -1;
1161         }
1162
1163         /*
1164          * Queue frame if in a transitional state.
1165          * This occurs while registering the Port_ID / MAC address after FLOGI.
1166          */
1167         spin_lock_irqsave(&fnic->fnic_lock, flags);
1168         if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) {
1169                 skb_queue_tail(&fnic->tx_queue, fp_skb(fp));
1170                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1171                 return 0;
1172         }
1173         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1174
1175         return fnic_send_frame(fnic, fp);
1176 }
1177
1178 /**
1179  * fnic_flush_tx() - send queued frames.
1180  * @fnic: fnic device
1181  *
1182  * Send frames that were waiting to go out in FC or Ethernet mode.
1183  * Whenever changing modes we purge queued frames, so these frames should
1184  * be queued for the stable mode that we're in, either FC or Ethernet.
1185  *
1186  * Called without fnic_lock held.
1187  */
1188 void fnic_flush_tx(struct fnic *fnic)
1189 {
1190         struct sk_buff *skb;
1191         struct fc_frame *fp;
1192
1193         while ((skb = skb_dequeue(&fnic->tx_queue))) {
1194                 fp = (struct fc_frame *)skb;
1195                 fnic_send_frame(fnic, fp);
1196         }
1197 }
1198
1199 /**
1200  * fnic_set_eth_mode() - put fnic into ethernet mode.
1201  * @fnic: fnic device
1202  *
1203  * Called without fnic lock held.
1204  */
1205 static void fnic_set_eth_mode(struct fnic *fnic)
1206 {
1207         unsigned long flags;
1208         enum fnic_state old_state;
1209         int ret;
1210
1211         spin_lock_irqsave(&fnic->fnic_lock, flags);
1212 again:
1213         old_state = fnic->state;
1214         switch (old_state) {
1215         case FNIC_IN_FC_MODE:
1216         case FNIC_IN_ETH_TRANS_FC_MODE:
1217         default:
1218                 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
1219                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1220
1221                 ret = fnic_fw_reset_handler(fnic);
1222
1223                 spin_lock_irqsave(&fnic->fnic_lock, flags);
1224                 if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE)
1225                         goto again;
1226                 if (ret)
1227                         fnic->state = old_state;
1228                 break;
1229
1230         case FNIC_IN_FC_TRANS_ETH_MODE:
1231         case FNIC_IN_ETH_MODE:
1232                 break;
1233         }
1234         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1235 }
1236
1237 static void fnic_wq_complete_frame_send(struct vnic_wq *wq,
1238                                         struct cq_desc *cq_desc,
1239                                         struct vnic_wq_buf *buf, void *opaque)
1240 {
1241         struct sk_buff *skb = buf->os_buf;
1242         struct fc_frame *fp = (struct fc_frame *)skb;
1243         struct fnic *fnic = vnic_dev_priv(wq->vdev);
1244
1245         dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len,
1246                          DMA_TO_DEVICE);
1247         dev_kfree_skb_irq(fp_skb(fp));
1248         buf->os_buf = NULL;
1249 }
1250
1251 static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev,
1252                                      struct cq_desc *cq_desc, u8 type,
1253                                      u16 q_number, u16 completed_index,
1254                                      void *opaque)
1255 {
1256         struct fnic *fnic = vnic_dev_priv(vdev);
1257         unsigned long flags;
1258
1259         spin_lock_irqsave(&fnic->wq_lock[q_number], flags);
1260         vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index,
1261                         fnic_wq_complete_frame_send, NULL);
1262         spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags);
1263
1264         return 0;
1265 }
1266
1267 int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do)
1268 {
1269         unsigned int wq_work_done = 0;
1270         unsigned int i;
1271
1272         for (i = 0; i < fnic->raw_wq_count; i++) {
1273                 wq_work_done  += vnic_cq_service(&fnic->cq[fnic->rq_count+i],
1274                                                  work_to_do,
1275                                                  fnic_wq_cmpl_handler_cont,
1276                                                  NULL);
1277         }
1278
1279         return wq_work_done;
1280 }
1281
1282
1283 void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
1284 {
1285         struct fc_frame *fp = buf->os_buf;
1286         struct fnic *fnic = vnic_dev_priv(wq->vdev);
1287
1288         dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len,
1289                          DMA_TO_DEVICE);
1290
1291         dev_kfree_skb(fp_skb(fp));
1292         buf->os_buf = NULL;
1293 }
1294
1295 void fnic_fcoe_reset_vlans(struct fnic *fnic)
1296 {
1297         unsigned long flags;
1298         struct fcoe_vlan *vlan;
1299         struct fcoe_vlan *next;
1300
1301         /*
1302          * indicate a link down to fcoe so that all fcf's are free'd
1303          * might not be required since we did this before sending vlan
1304          * discovery request
1305          */
1306         spin_lock_irqsave(&fnic->vlans_lock, flags);
1307         if (!list_empty(&fnic->vlans)) {
1308                 list_for_each_entry_safe(vlan, next, &fnic->vlans, list) {
1309                         list_del(&vlan->list);
1310                         kfree(vlan);
1311                 }
1312         }
1313         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1314 }
1315
1316 void fnic_handle_fip_timer(struct fnic *fnic)
1317 {
1318         unsigned long flags;
1319         struct fcoe_vlan *vlan;
1320         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1321         u64 sol_time;
1322
1323         spin_lock_irqsave(&fnic->fnic_lock, flags);
1324         if (fnic->stop_rx_link_events) {
1325                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1326                 return;
1327         }
1328         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1329
1330         if (fnic->ctlr.mode == FIP_MODE_NON_FIP)
1331                 return;
1332
1333         spin_lock_irqsave(&fnic->vlans_lock, flags);
1334         if (list_empty(&fnic->vlans)) {
1335                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1336                 /* no vlans available, try again */
1337                 if (printk_ratelimit())
1338                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1339                                   "Start VLAN Discovery\n");
1340                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1341                 return;
1342         }
1343
1344         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
1345         shost_printk(KERN_DEBUG, fnic->lport->host,
1346                   "fip_timer: vlan %d state %d sol_count %d\n",
1347                   vlan->vid, vlan->state, vlan->sol_count);
1348         switch (vlan->state) {
1349         case FIP_VLAN_USED:
1350                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1351                           "FIP VLAN is selected for FC transaction\n");
1352                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1353                 break;
1354         case FIP_VLAN_FAILED:
1355                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1356                 /* if all vlans are in failed state, restart vlan disc */
1357                 if (printk_ratelimit())
1358                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1359                                   "Start VLAN Discovery\n");
1360                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1361                 break;
1362         case FIP_VLAN_SENT:
1363                 if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) {
1364                         /*
1365                          * no response on this vlan, remove  from the list.
1366                          * Try the next vlan
1367                          */
1368                         shost_printk(KERN_INFO, fnic->lport->host,
1369                                   "Dequeue this VLAN ID %d from list\n",
1370                                   vlan->vid);
1371                         list_del(&vlan->list);
1372                         kfree(vlan);
1373                         vlan = NULL;
1374                         if (list_empty(&fnic->vlans)) {
1375                                 /* we exhausted all vlans, restart vlan disc */
1376                                 spin_unlock_irqrestore(&fnic->vlans_lock,
1377                                                         flags);
1378                                 shost_printk(KERN_INFO, fnic->lport->host,
1379                                           "fip_timer: vlan list empty, "
1380                                           "trigger vlan disc\n");
1381                                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1382                                 return;
1383                         }
1384                         /* check the next vlan */
1385                         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan,
1386                                                         list);
1387                         fnic->set_vlan(fnic, vlan->vid);
1388                         vlan->state = FIP_VLAN_SENT; /* sent now */
1389                 }
1390                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1391                 atomic64_inc(&fnic_stats->vlan_stats.sol_expiry_count);
1392                 vlan->sol_count++;
1393                 sol_time = jiffies + msecs_to_jiffies
1394                                         (FCOE_CTLR_START_DELAY);
1395                 mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
1396                 break;
1397         }
1398 }