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         u64 old_port_speed, new_port_speed;
  56
  57         spin_lock_irqsave(&fnic->fnic_lock, flags);
  58
  59         if (fnic->stop_rx_link_events) {
  60                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
  61                 return;
  62         }
  63
  64         old_link_down_cnt = fnic->link_down_cnt;
  65         old_link_status = fnic->link_status;
  66         old_port_speed = atomic64_read(
  67                         &fnic->fnic_stats.misc_stats.current_port_speed);
  68
  69         fnic->link_status = vnic_dev_link_status(fnic->vdev);
  70         fnic->link_down_cnt = vnic_dev_link_down_cnt(fnic->vdev);
  71
  72         new_port_speed = vnic_dev_port_speed(fnic->vdev);
  73         atomic64_set(&fnic->fnic_stats.misc_stats.current_port_speed,
  74                         new_port_speed);
  75         if (old_port_speed != new_port_speed)
  76                 shost_printk(KERN_INFO, fnic->lport->host,
  77                                 "Current vnic speed set to :  %llu\n",
  78                                 new_port_speed);
  79
  80         switch (vnic_dev_port_speed(fnic->vdev)) {
  81         case DCEM_PORTSPEED_10G:
  82                 fc_host_speed(fnic->lport->host)   = FC_PORTSPEED_10GBIT;
  83                 fnic->lport->link_supported_speeds = FC_PORTSPEED_10GBIT;
  84                 break;
  85         case DCEM_PORTSPEED_20G:
  86                 fc_host_speed(fnic->lport->host)   = FC_PORTSPEED_20GBIT;
  87                 fnic->lport->link_supported_speeds = FC_PORTSPEED_20GBIT;
  88                 break;
  89         case DCEM_PORTSPEED_25G:
  90                 fc_host_speed(fnic->lport->host)   = FC_PORTSPEED_25GBIT;
  91                 fnic->lport->link_supported_speeds = FC_PORTSPEED_25GBIT;
  92                 break;
  93         case DCEM_PORTSPEED_40G:
  94         case DCEM_PORTSPEED_4x10G:
  95                 fc_host_speed(fnic->lport->host)   = FC_PORTSPEED_40GBIT;
  96                 fnic->lport->link_supported_speeds = FC_PORTSPEED_40GBIT;
  97                 break;
  98         case DCEM_PORTSPEED_100G:
  99                 fc_host_speed(fnic->lport->host)   = FC_PORTSPEED_100GBIT;
 100                 fnic->lport->link_supported_speeds = FC_PORTSPEED_100GBIT;
 101                 break;
 102         default:
 103                 fc_host_speed(fnic->lport->host)   = FC_PORTSPEED_UNKNOWN;
 104                 fnic->lport->link_supported_speeds = FC_PORTSPEED_UNKNOWN;
 105                 break;
 106         }
 107
 108         if (old_link_status == fnic->link_status) {
 109                 if (!fnic->link_status) {
 110                         /* DOWN -> DOWN */
 111                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 112                         fnic_fc_trace_set_data(fnic->lport->host->host_no,
 113                                 FNIC_FC_LE, "Link Status: DOWN->DOWN",
 114                                 strlen("Link Status: DOWN->DOWN"));
 115                 } else {
 116                         if (old_link_down_cnt != fnic->link_down_cnt) {
 117                                 /* UP -> DOWN -> UP */
 118                                 fnic->lport->host_stats.link_failure_count++;
 119                                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 120                                 fnic_fc_trace_set_data(
 121                                         fnic->lport->host->host_no,
 122                                         FNIC_FC_LE,
 123                                         "Link Status:UP_DOWN_UP",
 124                                         strlen("Link_Status:UP_DOWN_UP")
 125                                         );
 126                                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 127                                              "link down\n");
 128                                 fcoe_ctlr_link_down(&fnic->ctlr);
 129                                 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
 130                                         /* start FCoE VLAN discovery */
 131                                         fnic_fc_trace_set_data(
 132                                                 fnic->lport->host->host_no,
 133                                                 FNIC_FC_LE,
 134                                                 "Link Status: UP_DOWN_UP_VLAN",
 135                                                 strlen(
 136                                                 "Link Status: UP_DOWN_UP_VLAN")
 137                                                 );
 138                                         fnic_fcoe_send_vlan_req(fnic);
 139                                         return;
 140                                 }
 141                                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 142                                              "link up\n");
 143                                 fcoe_ctlr_link_up(&fnic->ctlr);
 144                         } else {
 145                                 /* UP -> UP */
 146                                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 147                                 fnic_fc_trace_set_data(
 148                                         fnic->lport->host->host_no, FNIC_FC_LE,
 149                                         "Link Status: UP_UP",
 150                                         strlen("Link Status: UP_UP"));
 151                         }
 152                 }
 153         } else if (fnic->link_status) {
 154                 /* DOWN -> UP */
 155                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 156                 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
 157                         /* start FCoE VLAN discovery */
 158                                 fnic_fc_trace_set_data(
 159                                 fnic->lport->host->host_no,
 160                                 FNIC_FC_LE, "Link Status: DOWN_UP_VLAN",
 161                                 strlen("Link Status: DOWN_UP_VLAN"));
 162                         fnic_fcoe_send_vlan_req(fnic);
 163                         return;
 164                 }
 165                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n");
 166                 fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_LE,
 167                         "Link Status: DOWN_UP", strlen("Link Status: DOWN_UP"));
 168                 fcoe_ctlr_link_up(&fnic->ctlr);
 169         } else {
 170                 /* UP -> DOWN */
 171                 fnic->lport->host_stats.link_failure_count++;
 172                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 173                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link down\n");
 174                 fnic_fc_trace_set_data(
 175                         fnic->lport->host->host_no, FNIC_FC_LE,
 176                         "Link Status: UP_DOWN",
 177                         strlen("Link Status: UP_DOWN"));
 178                 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
 179                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 180                                 "deleting fip-timer during link-down\n");
 181                         del_timer_sync(&fnic->fip_timer);
 182                 }
 183                 fcoe_ctlr_link_down(&fnic->ctlr);
 184         }
 185
 186 }
 187
 188 /*
 189  * This function passes incoming fabric frames to libFC
 190  */
 191 void fnic_handle_frame(struct work_struct *work)
 192 {
 193         struct fnic *fnic = container_of(work, struct fnic, frame_work);
 194         struct fc_lport *lp = fnic->lport;
 195         unsigned long flags;
 196         struct sk_buff *skb;
 197         struct fc_frame *fp;
 198
 199         while ((skb = skb_dequeue(&fnic->frame_queue))) {
 200
 201                 spin_lock_irqsave(&fnic->fnic_lock, flags);
 202                 if (fnic->stop_rx_link_events) {
 203                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 204                         dev_kfree_skb(skb);
 205                         return;
 206                 }
 207                 fp = (struct fc_frame *)skb;
 208
 209                 /*
 210                  * If we're in a transitional state, just re-queue and return.
 211                  * The queue will be serviced when we get to a stable state.
 212                  */
 213                 if (fnic->state != FNIC_IN_FC_MODE &&
 214                     fnic->state != FNIC_IN_ETH_MODE) {
 215                         skb_queue_head(&fnic->frame_queue, skb);
 216                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 217                         return;
 218                 }
 219                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 220
 221                 fc_exch_recv(lp, fp);
 222         }
 223 }
 224
 225 void fnic_fcoe_evlist_free(struct fnic *fnic)
 226 {
 227         struct fnic_event *fevt = NULL;
 228         struct fnic_event *next = NULL;
 229         unsigned long flags;
 230
 231         spin_lock_irqsave(&fnic->fnic_lock, flags);
 232         if (list_empty(&fnic->evlist)) {
 233                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 234                 return;
 235         }
 236
 237         list_for_each_entry_safe(fevt, next, &fnic->evlist, list) {
 238                 list_del(&fevt->list);
 239                 kfree(fevt);
 240         }
 241         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 242 }
 243
 244 void fnic_handle_event(struct work_struct *work)
 245 {
 246         struct fnic *fnic = container_of(work, struct fnic, event_work);
 247         struct fnic_event *fevt = NULL;
 248         struct fnic_event *next = NULL;
 249         unsigned long flags;
 250
 251         spin_lock_irqsave(&fnic->fnic_lock, flags);
 252         if (list_empty(&fnic->evlist)) {
 253                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 254                 return;
 255         }
 256
 257         list_for_each_entry_safe(fevt, next, &fnic->evlist, list) {
 258                 if (fnic->stop_rx_link_events) {
 259                         list_del(&fevt->list);
 260                         kfree(fevt);
 261                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 262                         return;
 263                 }
 264                 /*
 265                  * If we're in a transitional state, just re-queue and return.
 266                  * The queue will be serviced when we get to a stable state.
 267                  */
 268                 if (fnic->state != FNIC_IN_FC_MODE &&
 269                     fnic->state != FNIC_IN_ETH_MODE) {
 270                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 271                         return;
 272                 }
 273
 274                 list_del(&fevt->list);
 275                 switch (fevt->event) {
 276                 case FNIC_EVT_START_VLAN_DISC:
 277                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 278                         fnic_fcoe_send_vlan_req(fnic);
 279                         spin_lock_irqsave(&fnic->fnic_lock, flags);
 280                         break;
 281                 case FNIC_EVT_START_FCF_DISC:
 282                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 283                                   "Start FCF Discovery\n");
 284                         fnic_fcoe_start_fcf_disc(fnic);
 285                         break;
 286                 default:
 287                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 288                                   "Unknown event 0x%x\n", fevt->event);
 289                         break;
 290                 }
 291                 kfree(fevt);
 292         }
 293         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 294 }
 295
 296 /**
 297  * Check if the Received FIP FLOGI frame is rejected
 298  * @fip: The FCoE controller that received the frame
 299  * @skb: The received FIP frame
 300  *
 301  * Returns non-zero if the frame is rejected with unsupported cmd with
 302  * insufficient resource els explanation.
 303  */
 304 static inline int is_fnic_fip_flogi_reject(struct fcoe_ctlr *fip,
 305                                          struct sk_buff *skb)
 306 {
 307         struct fc_lport *lport = fip->lp;
 308         struct fip_header *fiph;
 309         struct fc_frame_header *fh = NULL;
 310         struct fip_desc *desc;
 311         struct fip_encaps *els;
 312         u16 op;
 313         u8 els_op;
 314         u8 sub;
 315
 316         size_t rlen;
 317         size_t dlen = 0;
 318
 319         if (skb_linearize(skb))
 320                 return 0;
 321
 322         if (skb->len < sizeof(*fiph))
 323                 return 0;
 324
 325         fiph = (struct fip_header *)skb->data;
 326         op = ntohs(fiph->fip_op);
 327         sub = fiph->fip_subcode;
 328
 329         if (op != FIP_OP_LS)
 330                 return 0;
 331
 332         if (sub != FIP_SC_REP)
 333                 return 0;
 334
 335         rlen = ntohs(fiph->fip_dl_len) * 4;
 336         if (rlen + sizeof(*fiph) > skb->len)
 337                 return 0;
 338
 339         desc = (struct fip_desc *)(fiph + 1);
 340         dlen = desc->fip_dlen * FIP_BPW;
 341
 342         if (desc->fip_dtype == FIP_DT_FLOGI) {
 343
 344                 if (dlen < sizeof(*els) + sizeof(*fh) + 1)
 345                         return 0;
 346
 347                 els = (struct fip_encaps *)desc;
 348                 fh = (struct fc_frame_header *)(els + 1);
 349
 350                 if (!fh)
 351                         return 0;
 352
 353                 /*
 354                  * ELS command code, reason and explanation should be = Reject,
 355                  * unsupported command and insufficient resource
 356                  */
 357                 els_op = *(u8 *)(fh + 1);
 358                 if (els_op == ELS_LS_RJT) {
 359                         shost_printk(KERN_INFO, lport->host,
 360                                   "Flogi Request Rejected by Switch\n");
 361                         return 1;
 362                 }
 363                 shost_printk(KERN_INFO, lport->host,
 364                                 "Flogi Request Accepted by Switch\n");
 365         }
 366         return 0;
 367 }
 368
 369 static void fnic_fcoe_send_vlan_req(struct fnic *fnic)
 370 {
 371         struct fcoe_ctlr *fip = &fnic->ctlr;
 372         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 373         struct sk_buff *skb;
 374         char *eth_fr;
 375         struct fip_vlan *vlan;
 376         u64 vlan_tov;
 377
 378         fnic_fcoe_reset_vlans(fnic);
 379         fnic->set_vlan(fnic, 0);
 380
 381         if (printk_ratelimit())
 382                 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 383                           "Sending VLAN request...\n");
 384
 385         skb = dev_alloc_skb(sizeof(struct fip_vlan));
 386         if (!skb)
 387                 return;
 388
 389         eth_fr = (char *)skb->data;
 390         vlan = (struct fip_vlan *)eth_fr;
 391
 392         memset(vlan, 0, sizeof(*vlan));
 393         memcpy(vlan->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
 394         memcpy(vlan->eth.h_dest, fcoe_all_fcfs, ETH_ALEN);
 395         vlan->eth.h_proto = htons(ETH_P_FIP);
 396
 397         vlan->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
 398         vlan->fip.fip_op = htons(FIP_OP_VLAN);
 399         vlan->fip.fip_subcode = FIP_SC_VL_REQ;
 400         vlan->fip.fip_dl_len = htons(sizeof(vlan->desc) / FIP_BPW);
 401
 402         vlan->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
 403         vlan->desc.mac.fd_desc.fip_dlen = sizeof(vlan->desc.mac) / FIP_BPW;
 404         memcpy(&vlan->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
 405
 406         vlan->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
 407         vlan->desc.wwnn.fd_desc.fip_dlen = sizeof(vlan->desc.wwnn) / FIP_BPW;
 408         put_unaligned_be64(fip->lp->wwnn, &vlan->desc.wwnn.fd_wwn);
 409         atomic64_inc(&fnic_stats->vlan_stats.vlan_disc_reqs);
 410
 411         skb_put(skb, sizeof(*vlan));
 412         skb->protocol = htons(ETH_P_FIP);
 413         skb_reset_mac_header(skb);
 414         skb_reset_network_header(skb);
 415         fip->send(fip, skb);
 416
 417         /* set a timer so that we can retry if there no response */
 418         vlan_tov = jiffies + msecs_to_jiffies(FCOE_CTLR_FIPVLAN_TOV);
 419         mod_timer(&fnic->fip_timer, round_jiffies(vlan_tov));
 420 }
 421
 422 static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *skb)
 423 {
 424         struct fcoe_ctlr *fip = &fnic->ctlr;
 425         struct fip_header *fiph;
 426         struct fip_desc *desc;
 427         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 428         u16 vid;
 429         size_t rlen;
 430         size_t dlen;
 431         struct fcoe_vlan *vlan;
 432         u64 sol_time;
 433         unsigned long flags;
 434
 435         FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 436                   "Received VLAN response...\n");
 437
 438         fiph = (struct fip_header *) skb->data;
 439
 440         FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 441                   "Received VLAN response... OP 0x%x SUB_OP 0x%x\n",
 442                   ntohs(fiph->fip_op), fiph->fip_subcode);
 443
 444         rlen = ntohs(fiph->fip_dl_len) * 4;
 445         fnic_fcoe_reset_vlans(fnic);
 446         spin_lock_irqsave(&fnic->vlans_lock, flags);
 447         desc = (struct fip_desc *)(fiph + 1);
 448         while (rlen > 0) {
 449                 dlen = desc->fip_dlen * FIP_BPW;
 450                 switch (desc->fip_dtype) {
 451                 case FIP_DT_VLAN:
 452                         vid = ntohs(((struct fip_vlan_desc *)desc)->fd_vlan);
 453                         shost_printk(KERN_INFO, fnic->lport->host,
 454                                   "process_vlan_resp: FIP VLAN %d\n", vid);
 455                         vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
 456                         if (!vlan) {
 457                                 /* retry from timer */
 458                                 spin_unlock_irqrestore(&fnic->vlans_lock,
 459                                                         flags);
 460                                 goto out;
 461                         }
 462                         vlan->vid = vid & 0x0fff;
 463                         vlan->state = FIP_VLAN_AVAIL;
 464                         list_add_tail(&vlan->list, &fnic->vlans);
 465                         break;
 466                 }
 467                 desc = (struct fip_desc *)((char *)desc + dlen);
 468                 rlen -= dlen;
 469         }
 470
 471         /* any VLAN descriptors present ? */
 472         if (list_empty(&fnic->vlans)) {
 473                 /* retry from timer */
 474                 atomic64_inc(&fnic_stats->vlan_stats.resp_withno_vlanID);
 475                 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 476                           "No VLAN descriptors in FIP VLAN response\n");
 477                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 478                 goto out;
 479         }
 480
 481         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
 482         fnic->set_vlan(fnic, vlan->vid);
 483         vlan->state = FIP_VLAN_SENT; /* sent now */
 484         vlan->sol_count++;
 485         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 486
 487         /* start the solicitation */
 488         fcoe_ctlr_link_up(fip);
 489
 490         sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
 491         mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
 492 out:
 493         return;
 494 }
 495
 496 static void fnic_fcoe_start_fcf_disc(struct fnic *fnic)
 497 {
 498         unsigned long flags;
 499         struct fcoe_vlan *vlan;
 500         u64 sol_time;
 501
 502         spin_lock_irqsave(&fnic->vlans_lock, flags);
 503         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
 504         fnic->set_vlan(fnic, vlan->vid);
 505         vlan->state = FIP_VLAN_SENT; /* sent now */
 506         vlan->sol_count = 1;
 507         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 508
 509         /* start the solicitation */
 510         fcoe_ctlr_link_up(&fnic->ctlr);
 511
 512         sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
 513         mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
 514 }
 515
 516 static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag)
 517 {
 518         unsigned long flags;
 519         struct fcoe_vlan *fvlan;
 520
 521         spin_lock_irqsave(&fnic->vlans_lock, flags);
 522         if (list_empty(&fnic->vlans)) {
 523                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 524                 return -EINVAL;
 525         }
 526
 527         fvlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
 528         if (fvlan->state == FIP_VLAN_USED) {
 529                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 530                 return 0;
 531         }
 532
 533         if (fvlan->state == FIP_VLAN_SENT) {
 534                 fvlan->state = FIP_VLAN_USED;
 535                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 536                 return 0;
 537         }
 538         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 539         return -EINVAL;
 540 }
 541
 542 static void fnic_event_enq(struct fnic *fnic, enum fnic_evt ev)
 543 {
 544         struct fnic_event *fevt;
 545         unsigned long flags;
 546
 547         fevt = kmalloc(sizeof(*fevt), GFP_ATOMIC);
 548         if (!fevt)
 549                 return;
 550
 551         fevt->fnic = fnic;
 552         fevt->event = ev;
 553
 554         spin_lock_irqsave(&fnic->fnic_lock, flags);
 555         list_add_tail(&fevt->list, &fnic->evlist);
 556         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 557
 558         schedule_work(&fnic->event_work);
 559 }
 560
 561 static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb)
 562 {
 563         struct fip_header *fiph;
 564         int ret = 1;
 565         u16 op;
 566         u8 sub;
 567
 568         if (!skb || !(skb->data))
 569                 return -1;
 570
 571         if (skb_linearize(skb))
 572                 goto drop;
 573
 574         fiph = (struct fip_header *)skb->data;
 575         op = ntohs(fiph->fip_op);
 576         sub = fiph->fip_subcode;
 577
 578         if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
 579                 goto drop;
 580
 581         if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
 582                 goto drop;
 583
 584         if (op == FIP_OP_DISC && sub == FIP_SC_ADV) {
 585                 if (fnic_fcoe_vlan_check(fnic, ntohs(fiph->fip_flags)))
 586                         goto drop;
 587                 /* pass it on to fcoe */
 588                 ret = 1;
 589         } else if (op == FIP_OP_VLAN && sub == FIP_SC_VL_NOTE) {
 590                 /* set the vlan as used */
 591                 fnic_fcoe_process_vlan_resp(fnic, skb);
 592                 ret = 0;
 593         } else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) {
 594                 /* received CVL request, restart vlan disc */
 595                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
 596                 /* pass it on to fcoe */
 597                 ret = 1;
 598         }
 599 drop:
 600         return ret;
 601 }
 602
 603 void fnic_handle_fip_frame(struct work_struct *work)
 604 {
 605         struct fnic *fnic = container_of(work, struct fnic, fip_frame_work);
 606         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 607         unsigned long flags;
 608         struct sk_buff *skb;
 609         struct ethhdr *eh;
 610
 611         while ((skb = skb_dequeue(&fnic->fip_frame_queue))) {
 612                 spin_lock_irqsave(&fnic->fnic_lock, flags);
 613                 if (fnic->stop_rx_link_events) {
 614                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 615                         dev_kfree_skb(skb);
 616                         return;
 617                 }
 618                 /*
 619                  * If we're in a transitional state, just re-queue and return.
 620                  * The queue will be serviced when we get to a stable state.
 621                  */
 622                 if (fnic->state != FNIC_IN_FC_MODE &&
 623                     fnic->state != FNIC_IN_ETH_MODE) {
 624                         skb_queue_head(&fnic->fip_frame_queue, skb);
 625                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 626                         return;
 627                 }
 628                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 629                 eh = (struct ethhdr *)skb->data;
 630                 if (eh->h_proto == htons(ETH_P_FIP)) {
 631                         skb_pull(skb, sizeof(*eh));
 632                         if (fnic_fcoe_handle_fip_frame(fnic, skb) <= 0) {
 633                                 dev_kfree_skb(skb);
 634                                 continue;
 635                         }
 636                         /*
 637                          * If there's FLOGI rejects - clear all
 638                          * fcf's & restart from scratch
 639                          */
 640                         if (is_fnic_fip_flogi_reject(&fnic->ctlr, skb)) {
 641                                 atomic64_inc(
 642                                         &fnic_stats->vlan_stats.flogi_rejects);
 643                                 shost_printk(KERN_INFO, fnic->lport->host,
 644                                           "Trigger a Link down - VLAN Disc\n");
 645                                 fcoe_ctlr_link_down(&fnic->ctlr);
 646                                 /* start FCoE VLAN discovery */
 647                                 fnic_fcoe_send_vlan_req(fnic);
 648                                 dev_kfree_skb(skb);
 649                                 continue;
 650                         }
 651                         fcoe_ctlr_recv(&fnic->ctlr, skb);
 652                         continue;
 653                 }
 654         }
 655 }
 656
 657 /**
 658  * fnic_import_rq_eth_pkt() - handle received FCoE or FIP frame.
 659  * @fnic:       fnic instance.
 660  * @skb:        Ethernet Frame.
 661  */
 662 static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb)
 663 {
 664         struct fc_frame *fp;
 665         struct ethhdr *eh;
 666         struct fcoe_hdr *fcoe_hdr;
 667         struct fcoe_crc_eof *ft;
 668
 669         /*
 670          * Undo VLAN encapsulation if present.
 671          */
 672         eh = (struct ethhdr *)skb->data;
 673         if (eh->h_proto == htons(ETH_P_8021Q)) {
 674                 memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
 675                 eh = skb_pull(skb, VLAN_HLEN);
 676                 skb_reset_mac_header(skb);
 677         }
 678         if (eh->h_proto == htons(ETH_P_FIP)) {
 679                 if (!(fnic->config.flags & VFCF_FIP_CAPABLE)) {
 680                         printk(KERN_ERR "Dropped FIP frame, as firmware "
 681                                         "uses non-FIP mode, Enable FIP "
 682                                         "using UCSM\n");
 683                         goto drop;
 684                 }
 685                 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
 686                         FNIC_FC_RECV|0x80, (char *)skb->data, skb->len)) != 0) {
 687                         printk(KERN_ERR "fnic ctlr frame trace error!!!");
 688                 }
 689                 skb_queue_tail(&fnic->fip_frame_queue, skb);
 690                 queue_work(fnic_fip_queue, &fnic->fip_frame_work);
 691                 return 1;               /* let caller know packet was used */
 692         }
 693         if (eh->h_proto != htons(ETH_P_FCOE))
 694                 goto drop;
 695         skb_set_network_header(skb, sizeof(*eh));
 696         skb_pull(skb, sizeof(*eh));
 697
 698         fcoe_hdr = (struct fcoe_hdr *)skb->data;
 699         if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER)
 700                 goto drop;
 701
 702         fp = (struct fc_frame *)skb;
 703         fc_frame_init(fp);
 704         fr_sof(fp) = fcoe_hdr->fcoe_sof;
 705         skb_pull(skb, sizeof(struct fcoe_hdr));
 706         skb_reset_transport_header(skb);
 707
 708         ft = (struct fcoe_crc_eof *)(skb->data + skb->len - sizeof(*ft));
 709         fr_eof(fp) = ft->fcoe_eof;
 710         skb_trim(skb, skb->len - sizeof(*ft));
 711         return 0;
 712 drop:
 713         dev_kfree_skb_irq(skb);
 714         return -1;
 715 }
 716
 717 /**
 718  * fnic_update_mac_locked() - set data MAC address and filters.
 719  * @fnic:       fnic instance.
 720  * @new:        newly-assigned FCoE MAC address.
 721  *
 722  * Called with the fnic lock held.
 723  */
 724 void fnic_update_mac_locked(struct fnic *fnic, u8 *new)
 725 {
 726         u8 *ctl = fnic->ctlr.ctl_src_addr;
 727         u8 *data = fnic->data_src_addr;
 728
 729         if (is_zero_ether_addr(new))
 730                 new = ctl;
 731         if (ether_addr_equal(data, new))
 732                 return;
 733         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n", new);
 734         if (!is_zero_ether_addr(data) && !ether_addr_equal(data, ctl))
 735                 vnic_dev_del_addr(fnic->vdev, data);
 736         memcpy(data, new, ETH_ALEN);
 737         if (!ether_addr_equal(new, ctl))
 738                 vnic_dev_add_addr(fnic->vdev, new);
 739 }
 740
 741 /**
 742  * fnic_update_mac() - set data MAC address and filters.
 743  * @lport:      local port.
 744  * @new:        newly-assigned FCoE MAC address.
 745  */
 746 void fnic_update_mac(struct fc_lport *lport, u8 *new)
 747 {
 748         struct fnic *fnic = lport_priv(lport);
 749
 750         spin_lock_irq(&fnic->fnic_lock);
 751         fnic_update_mac_locked(fnic, new);
 752         spin_unlock_irq(&fnic->fnic_lock);
 753 }
 754
 755 /**
 756  * fnic_set_port_id() - set the port_ID after successful FLOGI.
 757  * @lport:      local port.
 758  * @port_id:    assigned FC_ID.
 759  * @fp:         received frame containing the FLOGI accept or NULL.
 760  *
 761  * This is called from libfc when a new FC_ID has been assigned.
 762  * This causes us to reset the firmware to FC_MODE and setup the new MAC
 763  * address and FC_ID.
 764  *
 765  * It is also called with FC_ID 0 when we're logged off.
 766  *
 767  * If the FC_ID is due to point-to-point, fp may be NULL.
 768  */
 769 void fnic_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp)
 770 {
 771         struct fnic *fnic = lport_priv(lport);
 772         u8 *mac;
 773         int ret;
 774
 775         FNIC_FCS_DBG(KERN_DEBUG, lport->host, "set port_id %x fp %p\n",
 776                      port_id, fp);
 777
 778         /*
 779          * If we're clearing the FC_ID, change to use the ctl_src_addr.
 780          * Set ethernet mode to send FLOGI.
 781          */
 782         if (!port_id) {
 783                 fnic_update_mac(lport, fnic->ctlr.ctl_src_addr);
 784                 fnic_set_eth_mode(fnic);
 785                 return;
 786         }
 787
 788         if (fp) {
 789                 mac = fr_cb(fp)->granted_mac;
 790                 if (is_zero_ether_addr(mac)) {
 791                         /* non-FIP - FLOGI already accepted - ignore return */
 792                         fcoe_ctlr_recv_flogi(&fnic->ctlr, lport, fp);
 793                 }
 794                 fnic_update_mac(lport, mac);
 795         }
 796
 797         /* Change state to reflect transition to FC mode */
 798         spin_lock_irq(&fnic->fnic_lock);
 799         if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE)
 800                 fnic->state = FNIC_IN_ETH_TRANS_FC_MODE;
 801         else {
 802                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 803                              "Unexpected fnic state %s while"
 804                              " processing flogi resp\n",
 805                              fnic_state_to_str(fnic->state));
 806                 spin_unlock_irq(&fnic->fnic_lock);
 807                 return;
 808         }
 809         spin_unlock_irq(&fnic->fnic_lock);
 810
 811         /*
 812          * Send FLOGI registration to firmware to set up FC mode.
 813          * The new address will be set up when registration completes.
 814          */
 815         ret = fnic_flogi_reg_handler(fnic, port_id);
 816
 817         if (ret < 0) {
 818                 spin_lock_irq(&fnic->fnic_lock);
 819                 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE)
 820                         fnic->state = FNIC_IN_ETH_MODE;
 821                 spin_unlock_irq(&fnic->fnic_lock);
 822         }
 823 }
 824
 825 static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc
 826                                     *cq_desc, struct vnic_rq_buf *buf,
 827                                     int skipped __attribute__((unused)),
 828                                     void *opaque)
 829 {
 830         struct fnic *fnic = vnic_dev_priv(rq->vdev);
 831         struct sk_buff *skb;
 832         struct fc_frame *fp;
 833         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 834         u8 type, color, eop, sop, ingress_port, vlan_stripped;
 835         u8 fcoe = 0, fcoe_sof, fcoe_eof;
 836         u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0;
 837         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
 838         u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc;
 839         u8 fcs_ok = 1, packet_error = 0;
 840         u16 q_number, completed_index, bytes_written = 0, vlan, checksum;
 841         u32 rss_hash;
 842         u16 exchange_id, tmpl;
 843         u8 sof = 0;
 844         u8 eof = 0;
 845         u32 fcp_bytes_written = 0;
 846         unsigned long flags;
 847
 848         dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len,
 849                          DMA_FROM_DEVICE);
 850         skb = buf->os_buf;
 851         fp = (struct fc_frame *)skb;
 852         buf->os_buf = NULL;
 853
 854         cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index);
 855         if (type == CQ_DESC_TYPE_RQ_FCP) {
 856                 cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc,
 857                                    &type, &color, &q_number, &completed_index,
 858                                    &eop, &sop, &fcoe_fc_crc_ok, &exchange_id,
 859                                    &tmpl, &fcp_bytes_written, &sof, &eof,
 860                                    &ingress_port, &packet_error,
 861                                    &fcoe_enc_error, &fcs_ok, &vlan_stripped,
 862                                    &vlan);
 863                 skb_trim(skb, fcp_bytes_written);
 864                 fr_sof(fp) = sof;
 865                 fr_eof(fp) = eof;
 866
 867         } else if (type == CQ_DESC_TYPE_RQ_ENET) {
 868                 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
 869                                     &type, &color, &q_number, &completed_index,
 870                                     &ingress_port, &fcoe, &eop, &sop,
 871                                     &rss_type, &csum_not_calc, &rss_hash,
 872                                     &bytes_written, &packet_error,
 873                                     &vlan_stripped, &vlan, &checksum,
 874                                     &fcoe_sof, &fcoe_fc_crc_ok,
 875                                     &fcoe_enc_error, &fcoe_eof,
 876                                     &tcp_udp_csum_ok, &udp, &tcp,
 877                                     &ipv4_csum_ok, &ipv6, &ipv4,
 878                                     &ipv4_fragment, &fcs_ok);
 879                 skb_trim(skb, bytes_written);
 880                 if (!fcs_ok) {
 881                         atomic64_inc(&fnic_stats->misc_stats.frame_errors);
 882                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 883                                      "fcs error.  dropping packet.\n");
 884                         goto drop;
 885                 }
 886                 if (fnic_import_rq_eth_pkt(fnic, skb))
 887                         return;
 888
 889         } else {
 890                 /* wrong CQ type*/
 891                 shost_printk(KERN_ERR, fnic->lport->host,
 892                              "fnic rq_cmpl wrong cq type x%x\n", type);
 893                 goto drop;
 894         }
 895
 896         if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) {
 897                 atomic64_inc(&fnic_stats->misc_stats.frame_errors);
 898                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 899                              "fnic rq_cmpl fcoe x%x fcsok x%x"
 900                              " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err"
 901                              " x%x\n",
 902                              fcoe, fcs_ok, packet_error,
 903                              fcoe_fc_crc_ok, fcoe_enc_error);
 904                 goto drop;
 905         }
 906
 907         spin_lock_irqsave(&fnic->fnic_lock, flags);
 908         if (fnic->stop_rx_link_events) {
 909                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 910                 goto drop;
 911         }
 912         fr_dev(fp) = fnic->lport;
 913         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 914         if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_RECV,
 915                                         (char *)skb->data, skb->len)) != 0) {
 916                 printk(KERN_ERR "fnic ctlr frame trace error!!!");
 917         }
 918
 919         skb_queue_tail(&fnic->frame_queue, skb);
 920         queue_work(fnic_event_queue, &fnic->frame_work);
 921
 922         return;
 923 drop:
 924         dev_kfree_skb_irq(skb);
 925 }
 926
 927 static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev,
 928                                      struct cq_desc *cq_desc, u8 type,
 929                                      u16 q_number, u16 completed_index,
 930                                      void *opaque)
 931 {
 932         struct fnic *fnic = vnic_dev_priv(vdev);
 933
 934         vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index,
 935                         VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv,
 936                         NULL);
 937         return 0;
 938 }
 939
 940 int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do)
 941 {
 942         unsigned int tot_rq_work_done = 0, cur_work_done;
 943         unsigned int i;
 944         int err;
 945
 946         for (i = 0; i < fnic->rq_count; i++) {
 947                 cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do,
 948                                                 fnic_rq_cmpl_handler_cont,
 949                                                 NULL);
 950                 if (cur_work_done) {
 951                         err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
 952                         if (err)
 953                                 shost_printk(KERN_ERR, fnic->lport->host,
 954                                              "fnic_alloc_rq_frame can't alloc"
 955                                              " frame\n");
 956                 }
 957                 tot_rq_work_done += cur_work_done;
 958         }
 959
 960         return tot_rq_work_done;
 961 }
 962
 963 /*
 964  * This function is called once at init time to allocate and fill RQ
 965  * buffers. Subsequently, it is called in the interrupt context after RQ
 966  * buffer processing to replenish the buffers in the RQ
 967  */
 968 int fnic_alloc_rq_frame(struct vnic_rq *rq)
 969 {
 970         struct fnic *fnic = vnic_dev_priv(rq->vdev);
 971         struct sk_buff *skb;
 972         u16 len;
 973         dma_addr_t pa;
 974         int r;
 975
 976         len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM;
 977         skb = dev_alloc_skb(len);
 978         if (!skb) {
 979                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 980                              "Unable to allocate RQ sk_buff\n");
 981                 return -ENOMEM;
 982         }
 983         skb_reset_mac_header(skb);
 984         skb_reset_transport_header(skb);
 985         skb_reset_network_header(skb);
 986         skb_put(skb, len);
 987         pa = dma_map_single(&fnic->pdev->dev, skb->data, len, DMA_FROM_DEVICE);
 988         if (dma_mapping_error(&fnic->pdev->dev, pa)) {
 989                 r = -ENOMEM;
 990                 printk(KERN_ERR "PCI mapping failed with error %d\n", r);
 991                 goto free_skb;
 992         }
 993
 994         fnic_queue_rq_desc(rq, skb, pa, len);
 995         return 0;
 996
 997 free_skb:
 998         kfree_skb(skb);
 999         return r;
1000 }
1001
1002 void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1003 {
1004         struct fc_frame *fp = buf->os_buf;
1005         struct fnic *fnic = vnic_dev_priv(rq->vdev);
1006
1007         dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len,
1008                          DMA_FROM_DEVICE);
1009
1010         dev_kfree_skb(fp_skb(fp));
1011         buf->os_buf = NULL;
1012 }
1013
1014 /**
1015  * fnic_eth_send() - Send Ethernet frame.
1016  * @fip:        fcoe_ctlr instance.
1017  * @skb:        Ethernet Frame, FIP, without VLAN encapsulation.
1018  */
1019 void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
1020 {
1021         struct fnic *fnic = fnic_from_ctlr(fip);
1022         struct vnic_wq *wq = &fnic->wq[0];
1023         dma_addr_t pa;
1024         struct ethhdr *eth_hdr;
1025         struct vlan_ethhdr *vlan_hdr;
1026         unsigned long flags;
1027
1028         if (!fnic->vlan_hw_insert) {
1029                 eth_hdr = (struct ethhdr *)skb_mac_header(skb);
1030                 vlan_hdr = skb_push(skb, sizeof(*vlan_hdr) - sizeof(*eth_hdr));
1031                 memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN);
1032                 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
1033                 vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto;
1034                 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
1035                 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
1036                         FNIC_FC_SEND|0x80, (char *)eth_hdr, skb->len)) != 0) {
1037                         printk(KERN_ERR "fnic ctlr frame trace error!!!");
1038                 }
1039         } else {
1040                 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
1041                         FNIC_FC_SEND|0x80, (char *)skb->data, skb->len)) != 0) {
1042                         printk(KERN_ERR "fnic ctlr frame trace error!!!");
1043                 }
1044         }
1045
1046         pa = dma_map_single(&fnic->pdev->dev, skb->data, skb->len,
1047                         DMA_TO_DEVICE);
1048         if (dma_mapping_error(&fnic->pdev->dev, pa)) {
1049                 printk(KERN_ERR "DMA mapping failed\n");
1050                 goto free_skb;
1051         }
1052
1053         spin_lock_irqsave(&fnic->wq_lock[0], flags);
1054         if (!vnic_wq_desc_avail(wq))
1055                 goto irq_restore;
1056
1057         fnic_queue_wq_eth_desc(wq, skb, pa, skb->len,
1058                                0 /* hw inserts cos value */,
1059                                fnic->vlan_id, 1);
1060         spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1061         return;
1062
1063 irq_restore:
1064         spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1065         dma_unmap_single(&fnic->pdev->dev, pa, skb->len, DMA_TO_DEVICE);
1066 free_skb:
1067         kfree_skb(skb);
1068 }
1069
1070 /*
1071  * Send FC frame.
1072  */
1073 static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
1074 {
1075         struct vnic_wq *wq = &fnic->wq[0];
1076         struct sk_buff *skb;
1077         dma_addr_t pa;
1078         struct ethhdr *eth_hdr;
1079         struct vlan_ethhdr *vlan_hdr;
1080         struct fcoe_hdr *fcoe_hdr;
1081         struct fc_frame_header *fh;
1082         u32 tot_len, eth_hdr_len;
1083         int ret = 0;
1084         unsigned long flags;
1085
1086         fh = fc_frame_header_get(fp);
1087         skb = fp_skb(fp);
1088
1089         if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
1090             fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb))
1091                 return 0;
1092
1093         if (!fnic->vlan_hw_insert) {
1094                 eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr);
1095                 vlan_hdr = skb_push(skb, eth_hdr_len);
1096                 eth_hdr = (struct ethhdr *)vlan_hdr;
1097                 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
1098                 vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE);
1099                 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
1100                 fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1);
1101         } else {
1102                 eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr);
1103                 eth_hdr = skb_push(skb, eth_hdr_len);
1104                 eth_hdr->h_proto = htons(ETH_P_FCOE);
1105                 fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1);
1106         }
1107
1108         if (fnic->ctlr.map_dest)
1109                 fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
1110         else
1111                 memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN);
1112         memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN);
1113
1114         tot_len = skb->len;
1115         BUG_ON(tot_len % 4);
1116
1117         memset(fcoe_hdr, 0, sizeof(*fcoe_hdr));
1118         fcoe_hdr->fcoe_sof = fr_sof(fp);
1119         if (FC_FCOE_VER)
1120                 FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER);
1121
1122         pa = dma_map_single(&fnic->pdev->dev, eth_hdr, tot_len, DMA_TO_DEVICE);
1123         if (dma_mapping_error(&fnic->pdev->dev, pa)) {
1124                 ret = -ENOMEM;
1125                 printk(KERN_ERR "DMA map failed with error %d\n", ret);
1126                 goto free_skb_on_err;
1127         }
1128
1129         if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_SEND,
1130                                 (char *)eth_hdr, tot_len)) != 0) {
1131                 printk(KERN_ERR "fnic ctlr frame trace error!!!");
1132         }
1133
1134         spin_lock_irqsave(&fnic->wq_lock[0], flags);
1135
1136         if (!vnic_wq_desc_avail(wq)) {
1137                 dma_unmap_single(&fnic->pdev->dev, pa, tot_len, DMA_TO_DEVICE);
1138                 ret = -1;
1139                 goto irq_restore;
1140         }
1141
1142         fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
1143                            0 /* hw inserts cos value */,
1144                            fnic->vlan_id, 1, 1, 1);
1145
1146 irq_restore:
1147         spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1148
1149 free_skb_on_err:
1150         if (ret)
1151                 dev_kfree_skb_any(fp_skb(fp));
1152
1153         return ret;
1154 }
1155
1156 /*
1157  * fnic_send
1158  * Routine to send a raw frame
1159  */
1160 int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
1161 {
1162         struct fnic *fnic = lport_priv(lp);
1163         unsigned long flags;
1164
1165         if (fnic->in_remove) {
1166                 dev_kfree_skb(fp_skb(fp));
1167                 return -1;
1168         }
1169
1170         /*
1171          * Queue frame if in a transitional state.
1172          * This occurs while registering the Port_ID / MAC address after FLOGI.
1173          */
1174         spin_lock_irqsave(&fnic->fnic_lock, flags);
1175         if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) {
1176                 skb_queue_tail(&fnic->tx_queue, fp_skb(fp));
1177                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1178                 return 0;
1179         }
1180         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1181
1182         return fnic_send_frame(fnic, fp);
1183 }
1184
1185 /**
1186  * fnic_flush_tx() - send queued frames.
1187  * @fnic: fnic device
1188  *
1189  * Send frames that were waiting to go out in FC or Ethernet mode.
1190  * Whenever changing modes we purge queued frames, so these frames should
1191  * be queued for the stable mode that we're in, either FC or Ethernet.
1192  *
1193  * Called without fnic_lock held.
1194  */
1195 void fnic_flush_tx(struct fnic *fnic)
1196 {
1197         struct sk_buff *skb;
1198         struct fc_frame *fp;
1199
1200         while ((skb = skb_dequeue(&fnic->tx_queue))) {
1201                 fp = (struct fc_frame *)skb;
1202                 fnic_send_frame(fnic, fp);
1203         }
1204 }
1205
1206 /**
1207  * fnic_set_eth_mode() - put fnic into ethernet mode.
1208  * @fnic: fnic device
1209  *
1210  * Called without fnic lock held.
1211  */
1212 static void fnic_set_eth_mode(struct fnic *fnic)
1213 {
1214         unsigned long flags;
1215         enum fnic_state old_state;
1216         int ret;
1217
1218         spin_lock_irqsave(&fnic->fnic_lock, flags);
1219 again:
1220         old_state = fnic->state;
1221         switch (old_state) {
1222         case FNIC_IN_FC_MODE:
1223         case FNIC_IN_ETH_TRANS_FC_MODE:
1224         default:
1225                 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
1226                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1227
1228                 ret = fnic_fw_reset_handler(fnic);
1229
1230                 spin_lock_irqsave(&fnic->fnic_lock, flags);
1231                 if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE)
1232                         goto again;
1233                 if (ret)
1234                         fnic->state = old_state;
1235                 break;
1236
1237         case FNIC_IN_FC_TRANS_ETH_MODE:
1238         case FNIC_IN_ETH_MODE:
1239                 break;
1240         }
1241         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1242 }
1243
1244 static void fnic_wq_complete_frame_send(struct vnic_wq *wq,
1245                                         struct cq_desc *cq_desc,
1246                                         struct vnic_wq_buf *buf, void *opaque)
1247 {
1248         struct sk_buff *skb = buf->os_buf;
1249         struct fc_frame *fp = (struct fc_frame *)skb;
1250         struct fnic *fnic = vnic_dev_priv(wq->vdev);
1251
1252         dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len,
1253                          DMA_TO_DEVICE);
1254         dev_kfree_skb_irq(fp_skb(fp));
1255         buf->os_buf = NULL;
1256 }
1257
1258 static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev,
1259                                      struct cq_desc *cq_desc, u8 type,
1260                                      u16 q_number, u16 completed_index,
1261                                      void *opaque)
1262 {
1263         struct fnic *fnic = vnic_dev_priv(vdev);
1264         unsigned long flags;
1265
1266         spin_lock_irqsave(&fnic->wq_lock[q_number], flags);
1267         vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index,
1268                         fnic_wq_complete_frame_send, NULL);
1269         spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags);
1270
1271         return 0;
1272 }
1273
1274 int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do)
1275 {
1276         unsigned int wq_work_done = 0;
1277         unsigned int i;
1278
1279         for (i = 0; i < fnic->raw_wq_count; i++) {
1280                 wq_work_done  += vnic_cq_service(&fnic->cq[fnic->rq_count+i],
1281                                                  work_to_do,
1282                                                  fnic_wq_cmpl_handler_cont,
1283                                                  NULL);
1284         }
1285
1286         return wq_work_done;
1287 }
1288
1289
1290 void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
1291 {
1292         struct fc_frame *fp = buf->os_buf;
1293         struct fnic *fnic = vnic_dev_priv(wq->vdev);
1294
1295         dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len,
1296                          DMA_TO_DEVICE);
1297
1298         dev_kfree_skb(fp_skb(fp));
1299         buf->os_buf = NULL;
1300 }
1301
1302 void fnic_fcoe_reset_vlans(struct fnic *fnic)
1303 {
1304         unsigned long flags;
1305         struct fcoe_vlan *vlan;
1306         struct fcoe_vlan *next;
1307
1308         /*
1309          * indicate a link down to fcoe so that all fcf's are free'd
1310          * might not be required since we did this before sending vlan
1311          * discovery request
1312          */
1313         spin_lock_irqsave(&fnic->vlans_lock, flags);
1314         if (!list_empty(&fnic->vlans)) {
1315                 list_for_each_entry_safe(vlan, next, &fnic->vlans, list) {
1316                         list_del(&vlan->list);
1317                         kfree(vlan);
1318                 }
1319         }
1320         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1321 }
1322
1323 void fnic_handle_fip_timer(struct fnic *fnic)
1324 {
1325         unsigned long flags;
1326         struct fcoe_vlan *vlan;
1327         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1328         u64 sol_time;
1329
1330         spin_lock_irqsave(&fnic->fnic_lock, flags);
1331         if (fnic->stop_rx_link_events) {
1332                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1333                 return;
1334         }
1335         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1336
1337         if (fnic->ctlr.mode == FIP_MODE_NON_FIP)
1338                 return;
1339
1340         spin_lock_irqsave(&fnic->vlans_lock, flags);
1341         if (list_empty(&fnic->vlans)) {
1342                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1343                 /* no vlans available, try again */
1344                 if (printk_ratelimit())
1345                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1346                                   "Start VLAN Discovery\n");
1347                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1348                 return;
1349         }
1350
1351         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
1352         shost_printk(KERN_DEBUG, fnic->lport->host,
1353                   "fip_timer: vlan %d state %d sol_count %d\n",
1354                   vlan->vid, vlan->state, vlan->sol_count);
1355         switch (vlan->state) {
1356         case FIP_VLAN_USED:
1357                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1358                           "FIP VLAN is selected for FC transaction\n");
1359                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1360                 break;
1361         case FIP_VLAN_FAILED:
1362                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1363                 /* if all vlans are in failed state, restart vlan disc */
1364                 if (printk_ratelimit())
1365                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1366                                   "Start VLAN Discovery\n");
1367                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1368                 break;
1369         case FIP_VLAN_SENT:
1370                 if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) {
1371                         /*
1372                          * no response on this vlan, remove  from the list.
1373                          * Try the next vlan
1374                          */
1375                         shost_printk(KERN_INFO, fnic->lport->host,
1376                                   "Dequeue this VLAN ID %d from list\n",
1377                                   vlan->vid);
1378                         list_del(&vlan->list);
1379                         kfree(vlan);
1380                         vlan = NULL;
1381                         if (list_empty(&fnic->vlans)) {
1382                                 /* we exhausted all vlans, restart vlan disc */
1383                                 spin_unlock_irqrestore(&fnic->vlans_lock,
1384                                                         flags);
1385                                 shost_printk(KERN_INFO, fnic->lport->host,
1386                                           "fip_timer: vlan list empty, "
1387                                           "trigger vlan disc\n");
1388                                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1389                                 return;
1390                         }
1391                         /* check the next vlan */
1392                         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan,
1393                                                         list);
1394                         fnic->set_vlan(fnic, vlan->vid);
1395                         vlan->state = FIP_VLAN_SENT; /* sent now */
1396                 }
1397                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1398                 atomic64_inc(&fnic_stats->vlan_stats.sol_expiry_count);
1399                 vlan->sol_count++;
1400                 sol_time = jiffies + msecs_to_jiffies
1401                                         (FCOE_CTLR_START_DELAY);
1402                 mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
1403                 break;
1404         }
1405 }