drivers/scsi/fnic/fnic

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This source file includes following definitions.
fnic_handle_link
fnic_handle_frame
fnic_fcoe_evlist_free
fnic_handle_event
is_fnic_fip_flogi_reject
fnic_fcoe_send_vlan_req
fnic_fcoe_process_vlan_resp
fnic_fcoe_start_fcf_disc
fnic_fcoe_vlan_check
fnic_event_enq
fnic_fcoe_handle_fip_frame
fnic_handle_fip_frame
fnic_import_rq_eth_pkt
fnic_update_mac_locked
fnic_update_mac
fnic_set_port_id
fnic_rq_cmpl_frame_recv
fnic_rq_cmpl_handler_cont
fnic_rq_cmpl_handler
fnic_alloc_rq_frame
fnic_free_rq_buf
fnic_eth_send
fnic_send_frame
fnic_send
fnic_flush_tx
fnic_set_eth_mode
fnic_wq_complete_frame_send
fnic_wq_cmpl_handler_cont
fnic_wq_cmpl_handler
fnic_free_wq_buf
fnic_fcoe_reset_vlans
fnic_handle_fip_timer
   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         enum fip_desc_type els_dtype = 0;
 313         u16 op;
 314         u8 els_op;
 315         u8 sub;
 316 
 317         size_t els_len = 0;
 318         size_t rlen;
 319         size_t dlen = 0;
 320 
 321         if (skb_linearize(skb))
 322                 return 0;
 323 
 324         if (skb->len < sizeof(*fiph))
 325                 return 0;
 326 
 327         fiph = (struct fip_header *)skb->data;
 328         op = ntohs(fiph->fip_op);
 329         sub = fiph->fip_subcode;
 330 
 331         if (op != FIP_OP_LS)
 332                 return 0;
 333 
 334         if (sub != FIP_SC_REP)
 335                 return 0;
 336 
 337         rlen = ntohs(fiph->fip_dl_len) * 4;
 338         if (rlen + sizeof(*fiph) > skb->len)
 339                 return 0;
 340 
 341         desc = (struct fip_desc *)(fiph + 1);
 342         dlen = desc->fip_dlen * FIP_BPW;
 343 
 344         if (desc->fip_dtype == FIP_DT_FLOGI) {
 345 
 346                 if (dlen < sizeof(*els) + sizeof(*fh) + 1)
 347                         return 0;
 348 
 349                 els_len = dlen - sizeof(*els);
 350                 els = (struct fip_encaps *)desc;
 351                 fh = (struct fc_frame_header *)(els + 1);
 352                 els_dtype = desc->fip_dtype;
 353 
 354                 if (!fh)
 355                         return 0;
 356 
 357                 /*
 358                  * ELS command code, reason and explanation should be = Reject,
 359                  * unsupported command and insufficient resource
 360                  */
 361                 els_op = *(u8 *)(fh + 1);
 362                 if (els_op == ELS_LS_RJT) {
 363                         shost_printk(KERN_INFO, lport->host,
 364                                   "Flogi Request Rejected by Switch\n");
 365                         return 1;
 366                 }
 367                 shost_printk(KERN_INFO, lport->host,
 368                                 "Flogi Request Accepted by Switch\n");
 369         }
 370         return 0;
 371 }
 372 
 373 static void fnic_fcoe_send_vlan_req(struct fnic *fnic)
 374 {
 375         struct fcoe_ctlr *fip = &fnic->ctlr;
 376         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 377         struct sk_buff *skb;
 378         char *eth_fr;
 379         int fr_len;
 380         struct fip_vlan *vlan;
 381         u64 vlan_tov;
 382 
 383         fnic_fcoe_reset_vlans(fnic);
 384         fnic->set_vlan(fnic, 0);
 385 
 386         if (printk_ratelimit())
 387                 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 388                           "Sending VLAN request...\n");
 389 
 390         skb = dev_alloc_skb(sizeof(struct fip_vlan));
 391         if (!skb)
 392                 return;
 393 
 394         fr_len = sizeof(*vlan);
 395         eth_fr = (char *)skb->data;
 396         vlan = (struct fip_vlan *)eth_fr;
 397 
 398         memset(vlan, 0, sizeof(*vlan));
 399         memcpy(vlan->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
 400         memcpy(vlan->eth.h_dest, fcoe_all_fcfs, ETH_ALEN);
 401         vlan->eth.h_proto = htons(ETH_P_FIP);
 402 
 403         vlan->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
 404         vlan->fip.fip_op = htons(FIP_OP_VLAN);
 405         vlan->fip.fip_subcode = FIP_SC_VL_REQ;
 406         vlan->fip.fip_dl_len = htons(sizeof(vlan->desc) / FIP_BPW);
 407 
 408         vlan->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
 409         vlan->desc.mac.fd_desc.fip_dlen = sizeof(vlan->desc.mac) / FIP_BPW;
 410         memcpy(&vlan->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
 411 
 412         vlan->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
 413         vlan->desc.wwnn.fd_desc.fip_dlen = sizeof(vlan->desc.wwnn) / FIP_BPW;
 414         put_unaligned_be64(fip->lp->wwnn, &vlan->desc.wwnn.fd_wwn);
 415         atomic64_inc(&fnic_stats->vlan_stats.vlan_disc_reqs);
 416 
 417         skb_put(skb, sizeof(*vlan));
 418         skb->protocol = htons(ETH_P_FIP);
 419         skb_reset_mac_header(skb);
 420         skb_reset_network_header(skb);
 421         fip->send(fip, skb);
 422 
 423         /* set a timer so that we can retry if there no response */
 424         vlan_tov = jiffies + msecs_to_jiffies(FCOE_CTLR_FIPVLAN_TOV);
 425         mod_timer(&fnic->fip_timer, round_jiffies(vlan_tov));
 426 }
 427 
 428 static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *skb)
 429 {
 430         struct fcoe_ctlr *fip = &fnic->ctlr;
 431         struct fip_header *fiph;
 432         struct fip_desc *desc;
 433         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 434         u16 vid;
 435         size_t rlen;
 436         size_t dlen;
 437         struct fcoe_vlan *vlan;
 438         u64 sol_time;
 439         unsigned long flags;
 440 
 441         FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 442                   "Received VLAN response...\n");
 443 
 444         fiph = (struct fip_header *) skb->data;
 445 
 446         FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 447                   "Received VLAN response... OP 0x%x SUB_OP 0x%x\n",
 448                   ntohs(fiph->fip_op), fiph->fip_subcode);
 449 
 450         rlen = ntohs(fiph->fip_dl_len) * 4;
 451         fnic_fcoe_reset_vlans(fnic);
 452         spin_lock_irqsave(&fnic->vlans_lock, flags);
 453         desc = (struct fip_desc *)(fiph + 1);
 454         while (rlen > 0) {
 455                 dlen = desc->fip_dlen * FIP_BPW;
 456                 switch (desc->fip_dtype) {
 457                 case FIP_DT_VLAN:
 458                         vid = ntohs(((struct fip_vlan_desc *)desc)->fd_vlan);
 459                         shost_printk(KERN_INFO, fnic->lport->host,
 460                                   "process_vlan_resp: FIP VLAN %d\n", vid);
 461                         vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
 462                         if (!vlan) {
 463                                 /* retry from timer */
 464                                 spin_unlock_irqrestore(&fnic->vlans_lock,
 465                                                         flags);
 466                                 goto out;
 467                         }
 468                         vlan->vid = vid & 0x0fff;
 469                         vlan->state = FIP_VLAN_AVAIL;
 470                         list_add_tail(&vlan->list, &fnic->vlans);
 471                         break;
 472                 }
 473                 desc = (struct fip_desc *)((char *)desc + dlen);
 474                 rlen -= dlen;
 475         }
 476 
 477         /* any VLAN descriptors present ? */
 478         if (list_empty(&fnic->vlans)) {
 479                 /* retry from timer */
 480                 atomic64_inc(&fnic_stats->vlan_stats.resp_withno_vlanID);
 481                 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 482                           "No VLAN descriptors in FIP VLAN response\n");
 483                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 484                 goto out;
 485         }
 486 
 487         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
 488         fnic->set_vlan(fnic, vlan->vid);
 489         vlan->state = FIP_VLAN_SENT; /* sent now */
 490         vlan->sol_count++;
 491         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 492 
 493         /* start the solicitation */
 494         fcoe_ctlr_link_up(fip);
 495 
 496         sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
 497         mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
 498 out:
 499         return;
 500 }
 501 
 502 static void fnic_fcoe_start_fcf_disc(struct fnic *fnic)
 503 {
 504         unsigned long flags;
 505         struct fcoe_vlan *vlan;
 506         u64 sol_time;
 507 
 508         spin_lock_irqsave(&fnic->vlans_lock, flags);
 509         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
 510         fnic->set_vlan(fnic, vlan->vid);
 511         vlan->state = FIP_VLAN_SENT; /* sent now */
 512         vlan->sol_count = 1;
 513         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 514 
 515         /* start the solicitation */
 516         fcoe_ctlr_link_up(&fnic->ctlr);
 517 
 518         sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
 519         mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
 520 }
 521 
 522 static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag)
 523 {
 524         unsigned long flags;
 525         struct fcoe_vlan *fvlan;
 526 
 527         spin_lock_irqsave(&fnic->vlans_lock, flags);
 528         if (list_empty(&fnic->vlans)) {
 529                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 530                 return -EINVAL;
 531         }
 532 
 533         fvlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
 534         if (fvlan->state == FIP_VLAN_USED) {
 535                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 536                 return 0;
 537         }
 538 
 539         if (fvlan->state == FIP_VLAN_SENT) {
 540                 fvlan->state = FIP_VLAN_USED;
 541                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 542                 return 0;
 543         }
 544         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 545         return -EINVAL;
 546 }
 547 
 548 static void fnic_event_enq(struct fnic *fnic, enum fnic_evt ev)
 549 {
 550         struct fnic_event *fevt;
 551         unsigned long flags;
 552 
 553         fevt = kmalloc(sizeof(*fevt), GFP_ATOMIC);
 554         if (!fevt)
 555                 return;
 556 
 557         fevt->fnic = fnic;
 558         fevt->event = ev;
 559 
 560         spin_lock_irqsave(&fnic->fnic_lock, flags);
 561         list_add_tail(&fevt->list, &fnic->evlist);
 562         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 563 
 564         schedule_work(&fnic->event_work);
 565 }
 566 
 567 static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb)
 568 {
 569         struct fip_header *fiph;
 570         int ret = 1;
 571         u16 op;
 572         u8 sub;
 573 
 574         if (!skb || !(skb->data))
 575                 return -1;
 576 
 577         if (skb_linearize(skb))
 578                 goto drop;
 579 
 580         fiph = (struct fip_header *)skb->data;
 581         op = ntohs(fiph->fip_op);
 582         sub = fiph->fip_subcode;
 583 
 584         if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
 585                 goto drop;
 586 
 587         if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
 588                 goto drop;
 589 
 590         if (op == FIP_OP_DISC && sub == FIP_SC_ADV) {
 591                 if (fnic_fcoe_vlan_check(fnic, ntohs(fiph->fip_flags)))
 592                         goto drop;
 593                 /* pass it on to fcoe */
 594                 ret = 1;
 595         } else if (op == FIP_OP_VLAN && sub == FIP_SC_VL_NOTE) {
 596                 /* set the vlan as used */
 597                 fnic_fcoe_process_vlan_resp(fnic, skb);
 598                 ret = 0;
 599         } else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) {
 600                 /* received CVL request, restart vlan disc */
 601                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
 602                 /* pass it on to fcoe */
 603                 ret = 1;
 604         }
 605 drop:
 606         return ret;
 607 }
 608 
 609 void fnic_handle_fip_frame(struct work_struct *work)
 610 {
 611         struct fnic *fnic = container_of(work, struct fnic, fip_frame_work);
 612         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 613         unsigned long flags;
 614         struct sk_buff *skb;
 615         struct ethhdr *eh;
 616 
 617         while ((skb = skb_dequeue(&fnic->fip_frame_queue))) {
 618                 spin_lock_irqsave(&fnic->fnic_lock, flags);
 619                 if (fnic->stop_rx_link_events) {
 620                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 621                         dev_kfree_skb(skb);
 622                         return;
 623                 }
 624                 /*
 625                  * If we're in a transitional state, just re-queue and return.
 626                  * The queue will be serviced when we get to a stable state.
 627                  */
 628                 if (fnic->state != FNIC_IN_FC_MODE &&
 629                     fnic->state != FNIC_IN_ETH_MODE) {
 630                         skb_queue_head(&fnic->fip_frame_queue, skb);
 631                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 632                         return;
 633                 }
 634                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 635                 eh = (struct ethhdr *)skb->data;
 636                 if (eh->h_proto == htons(ETH_P_FIP)) {
 637                         skb_pull(skb, sizeof(*eh));
 638                         if (fnic_fcoe_handle_fip_frame(fnic, skb) <= 0) {
 639                                 dev_kfree_skb(skb);
 640                                 continue;
 641                         }
 642                         /*
 643                          * If there's FLOGI rejects - clear all
 644                          * fcf's & restart from scratch
 645                          */
 646                         if (is_fnic_fip_flogi_reject(&fnic->ctlr, skb)) {
 647                                 atomic64_inc(
 648                                         &fnic_stats->vlan_stats.flogi_rejects);
 649                                 shost_printk(KERN_INFO, fnic->lport->host,
 650                                           "Trigger a Link down - VLAN Disc\n");
 651                                 fcoe_ctlr_link_down(&fnic->ctlr);
 652                                 /* start FCoE VLAN discovery */
 653                                 fnic_fcoe_send_vlan_req(fnic);
 654                                 dev_kfree_skb(skb);
 655                                 continue;
 656                         }
 657                         fcoe_ctlr_recv(&fnic->ctlr, skb);
 658                         continue;
 659                 }
 660         }
 661 }
 662 
 663 /**
 664  * fnic_import_rq_eth_pkt() - handle received FCoE or FIP frame.
 665  * @fnic:       fnic instance.
 666  * @skb:        Ethernet Frame.
 667  */
 668 static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb)
 669 {
 670         struct fc_frame *fp;
 671         struct ethhdr *eh;
 672         struct fcoe_hdr *fcoe_hdr;
 673         struct fcoe_crc_eof *ft;
 674 
 675         /*
 676          * Undo VLAN encapsulation if present.
 677          */
 678         eh = (struct ethhdr *)skb->data;
 679         if (eh->h_proto == htons(ETH_P_8021Q)) {
 680                 memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
 681                 eh = skb_pull(skb, VLAN_HLEN);
 682                 skb_reset_mac_header(skb);
 683         }
 684         if (eh->h_proto == htons(ETH_P_FIP)) {
 685                 if (!(fnic->config.flags & VFCF_FIP_CAPABLE)) {
 686                         printk(KERN_ERR "Dropped FIP frame, as firmware "
 687                                         "uses non-FIP mode, Enable FIP "
 688                                         "using UCSM\n");
 689                         goto drop;
 690                 }
 691                 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
 692                         FNIC_FC_RECV|0x80, (char *)skb->data, skb->len)) != 0) {
 693                         printk(KERN_ERR "fnic ctlr frame trace error!!!");
 694                 }
 695                 skb_queue_tail(&fnic->fip_frame_queue, skb);
 696                 queue_work(fnic_fip_queue, &fnic->fip_frame_work);
 697                 return 1;               /* let caller know packet was used */
 698         }
 699         if (eh->h_proto != htons(ETH_P_FCOE))
 700                 goto drop;
 701         skb_set_network_header(skb, sizeof(*eh));
 702         skb_pull(skb, sizeof(*eh));
 703 
 704         fcoe_hdr = (struct fcoe_hdr *)skb->data;
 705         if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER)
 706                 goto drop;
 707 
 708         fp = (struct fc_frame *)skb;
 709         fc_frame_init(fp);
 710         fr_sof(fp) = fcoe_hdr->fcoe_sof;
 711         skb_pull(skb, sizeof(struct fcoe_hdr));
 712         skb_reset_transport_header(skb);
 713 
 714         ft = (struct fcoe_crc_eof *)(skb->data + skb->len - sizeof(*ft));
 715         fr_eof(fp) = ft->fcoe_eof;
 716         skb_trim(skb, skb->len - sizeof(*ft));
 717         return 0;
 718 drop:
 719         dev_kfree_skb_irq(skb);
 720         return -1;
 721 }
 722 
 723 /**
 724  * fnic_update_mac_locked() - set data MAC address and filters.
 725  * @fnic:       fnic instance.
 726  * @new:        newly-assigned FCoE MAC address.
 727  *
 728  * Called with the fnic lock held.
 729  */
 730 void fnic_update_mac_locked(struct fnic *fnic, u8 *new)
 731 {
 732         u8 *ctl = fnic->ctlr.ctl_src_addr;
 733         u8 *data = fnic->data_src_addr;
 734 
 735         if (is_zero_ether_addr(new))
 736                 new = ctl;
 737         if (ether_addr_equal(data, new))
 738                 return;
 739         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n", new);
 740         if (!is_zero_ether_addr(data) && !ether_addr_equal(data, ctl))
 741                 vnic_dev_del_addr(fnic->vdev, data);
 742         memcpy(data, new, ETH_ALEN);
 743         if (!ether_addr_equal(new, ctl))
 744                 vnic_dev_add_addr(fnic->vdev, new);
 745 }
 746 
 747 /**
 748  * fnic_update_mac() - set data MAC address and filters.
 749  * @lport:      local port.
 750  * @new:        newly-assigned FCoE MAC address.
 751  */
 752 void fnic_update_mac(struct fc_lport *lport, u8 *new)
 753 {
 754         struct fnic *fnic = lport_priv(lport);
 755 
 756         spin_lock_irq(&fnic->fnic_lock);
 757         fnic_update_mac_locked(fnic, new);
 758         spin_unlock_irq(&fnic->fnic_lock);
 759 }
 760 
 761 /**
 762  * fnic_set_port_id() - set the port_ID after successful FLOGI.
 763  * @lport:      local port.
 764  * @port_id:    assigned FC_ID.
 765  * @fp:         received frame containing the FLOGI accept or NULL.
 766  *
 767  * This is called from libfc when a new FC_ID has been assigned.
 768  * This causes us to reset the firmware to FC_MODE and setup the new MAC
 769  * address and FC_ID.
 770  *
 771  * It is also called with FC_ID 0 when we're logged off.
 772  *
 773  * If the FC_ID is due to point-to-point, fp may be NULL.
 774  */
 775 void fnic_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp)
 776 {
 777         struct fnic *fnic = lport_priv(lport);
 778         u8 *mac;
 779         int ret;
 780 
 781         FNIC_FCS_DBG(KERN_DEBUG, lport->host, "set port_id %x fp %p\n",
 782                      port_id, fp);
 783 
 784         /*
 785          * If we're clearing the FC_ID, change to use the ctl_src_addr.
 786          * Set ethernet mode to send FLOGI.
 787          */
 788         if (!port_id) {
 789                 fnic_update_mac(lport, fnic->ctlr.ctl_src_addr);
 790                 fnic_set_eth_mode(fnic);
 791                 return;
 792         }
 793 
 794         if (fp) {
 795                 mac = fr_cb(fp)->granted_mac;
 796                 if (is_zero_ether_addr(mac)) {
 797                         /* non-FIP - FLOGI already accepted - ignore return */
 798                         fcoe_ctlr_recv_flogi(&fnic->ctlr, lport, fp);
 799                 }
 800                 fnic_update_mac(lport, mac);
 801         }
 802 
 803         /* Change state to reflect transition to FC mode */
 804         spin_lock_irq(&fnic->fnic_lock);
 805         if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE)
 806                 fnic->state = FNIC_IN_ETH_TRANS_FC_MODE;
 807         else {
 808                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 809                              "Unexpected fnic state %s while"
 810                              " processing flogi resp\n",
 811                              fnic_state_to_str(fnic->state));
 812                 spin_unlock_irq(&fnic->fnic_lock);
 813                 return;
 814         }
 815         spin_unlock_irq(&fnic->fnic_lock);
 816 
 817         /*
 818          * Send FLOGI registration to firmware to set up FC mode.
 819          * The new address will be set up when registration completes.
 820          */
 821         ret = fnic_flogi_reg_handler(fnic, port_id);
 822 
 823         if (ret < 0) {
 824                 spin_lock_irq(&fnic->fnic_lock);
 825                 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE)
 826                         fnic->state = FNIC_IN_ETH_MODE;
 827                 spin_unlock_irq(&fnic->fnic_lock);
 828         }
 829 }
 830 
 831 static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc
 832                                     *cq_desc, struct vnic_rq_buf *buf,
 833                                     int skipped __attribute__((unused)),
 834                                     void *opaque)
 835 {
 836         struct fnic *fnic = vnic_dev_priv(rq->vdev);
 837         struct sk_buff *skb;
 838         struct fc_frame *fp;
 839         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 840         unsigned int eth_hdrs_stripped;
 841         u8 type, color, eop, sop, ingress_port, vlan_stripped;
 842         u8 fcoe = 0, fcoe_sof, fcoe_eof;
 843         u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0;
 844         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
 845         u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc;
 846         u8 fcs_ok = 1, packet_error = 0;
 847         u16 q_number, completed_index, bytes_written = 0, vlan, checksum;
 848         u32 rss_hash;
 849         u16 exchange_id, tmpl;
 850         u8 sof = 0;
 851         u8 eof = 0;
 852         u32 fcp_bytes_written = 0;
 853         unsigned long flags;
 854 
 855         dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len,
 856                          DMA_FROM_DEVICE);
 857         skb = buf->os_buf;
 858         fp = (struct fc_frame *)skb;
 859         buf->os_buf = NULL;
 860 
 861         cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index);
 862         if (type == CQ_DESC_TYPE_RQ_FCP) {
 863                 cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc,
 864                                    &type, &color, &q_number, &completed_index,
 865                                    &eop, &sop, &fcoe_fc_crc_ok, &exchange_id,
 866                                    &tmpl, &fcp_bytes_written, &sof, &eof,
 867                                    &ingress_port, &packet_error,
 868                                    &fcoe_enc_error, &fcs_ok, &vlan_stripped,
 869                                    &vlan);
 870                 eth_hdrs_stripped = 1;
 871                 skb_trim(skb, fcp_bytes_written);
 872                 fr_sof(fp) = sof;
 873                 fr_eof(fp) = eof;
 874 
 875         } else if (type == CQ_DESC_TYPE_RQ_ENET) {
 876                 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
 877                                     &type, &color, &q_number, &completed_index,
 878                                     &ingress_port, &fcoe, &eop, &sop,
 879                                     &rss_type, &csum_not_calc, &rss_hash,
 880                                     &bytes_written, &packet_error,
 881                                     &vlan_stripped, &vlan, &checksum,
 882                                     &fcoe_sof, &fcoe_fc_crc_ok,
 883                                     &fcoe_enc_error, &fcoe_eof,
 884                                     &tcp_udp_csum_ok, &udp, &tcp,
 885                                     &ipv4_csum_ok, &ipv6, &ipv4,
 886                                     &ipv4_fragment, &fcs_ok);
 887                 eth_hdrs_stripped = 0;
 888                 skb_trim(skb, bytes_written);
 889                 if (!fcs_ok) {
 890                         atomic64_inc(&fnic_stats->misc_stats.frame_errors);
 891                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 892                                      "fcs error.  dropping packet.\n");
 893                         goto drop;
 894                 }
 895                 if (fnic_import_rq_eth_pkt(fnic, skb))
 896                         return;
 897 
 898         } else {
 899                 /* wrong CQ type*/
 900                 shost_printk(KERN_ERR, fnic->lport->host,
 901                              "fnic rq_cmpl wrong cq type x%x\n", type);
 902                 goto drop;
 903         }
 904 
 905         if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) {
 906                 atomic64_inc(&fnic_stats->misc_stats.frame_errors);
 907                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 908                              "fnic rq_cmpl fcoe x%x fcsok x%x"
 909                              " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err"
 910                              " x%x\n",
 911                              fcoe, fcs_ok, packet_error,
 912                              fcoe_fc_crc_ok, fcoe_enc_error);
 913                 goto drop;
 914         }
 915 
 916         spin_lock_irqsave(&fnic->fnic_lock, flags);
 917         if (fnic->stop_rx_link_events) {
 918                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 919                 goto drop;
 920         }
 921         fr_dev(fp) = fnic->lport;
 922         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 923         if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_RECV,
 924                                         (char *)skb->data, skb->len)) != 0) {
 925                 printk(KERN_ERR "fnic ctlr frame trace error!!!");
 926         }
 927 
 928         skb_queue_tail(&fnic->frame_queue, skb);
 929         queue_work(fnic_event_queue, &fnic->frame_work);
 930 
 931         return;
 932 drop:
 933         dev_kfree_skb_irq(skb);
 934 }
 935 
 936 static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev,
 937                                      struct cq_desc *cq_desc, u8 type,
 938                                      u16 q_number, u16 completed_index,
 939                                      void *opaque)
 940 {
 941         struct fnic *fnic = vnic_dev_priv(vdev);
 942 
 943         vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index,
 944                         VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv,
 945                         NULL);
 946         return 0;
 947 }
 948 
 949 int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do)
 950 {
 951         unsigned int tot_rq_work_done = 0, cur_work_done;
 952         unsigned int i;
 953         int err;
 954 
 955         for (i = 0; i < fnic->rq_count; i++) {
 956                 cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do,
 957                                                 fnic_rq_cmpl_handler_cont,
 958                                                 NULL);
 959                 if (cur_work_done) {
 960                         err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
 961                         if (err)
 962                                 shost_printk(KERN_ERR, fnic->lport->host,
 963                                              "fnic_alloc_rq_frame can't alloc"
 964                                              " frame\n");
 965                 }
 966                 tot_rq_work_done += cur_work_done;
 967         }
 968 
 969         return tot_rq_work_done;
 970 }
 971 
 972 /*
 973  * This function is called once at init time to allocate and fill RQ
 974  * buffers. Subsequently, it is called in the interrupt context after RQ
 975  * buffer processing to replenish the buffers in the RQ
 976  */
 977 int fnic_alloc_rq_frame(struct vnic_rq *rq)
 978 {
 979         struct fnic *fnic = vnic_dev_priv(rq->vdev);
 980         struct sk_buff *skb;
 981         u16 len;
 982         dma_addr_t pa;
 983         int r;
 984 
 985         len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM;
 986         skb = dev_alloc_skb(len);
 987         if (!skb) {
 988                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 989                              "Unable to allocate RQ sk_buff\n");
 990                 return -ENOMEM;
 991         }
 992         skb_reset_mac_header(skb);
 993         skb_reset_transport_header(skb);
 994         skb_reset_network_header(skb);
 995         skb_put(skb, len);
 996         pa = dma_map_single(&fnic->pdev->dev, skb->data, len, DMA_FROM_DEVICE);
 997         if (dma_mapping_error(&fnic->pdev->dev, pa)) {
 998                 r = -ENOMEM;
 999                 printk(KERN_ERR "PCI mapping failed with error %d\n", r);
1000                 goto free_skb;
1001         }
1002 
1003         fnic_queue_rq_desc(rq, skb, pa, len);
1004         return 0;
1005 
1006 free_skb:
1007         kfree_skb(skb);
1008         return r;
1009 }
1010 
1011 void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1012 {
1013         struct fc_frame *fp = buf->os_buf;
1014         struct fnic *fnic = vnic_dev_priv(rq->vdev);
1015 
1016         dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len,
1017                          DMA_FROM_DEVICE);
1018 
1019         dev_kfree_skb(fp_skb(fp));
1020         buf->os_buf = NULL;
1021 }
1022 
1023 /**
1024  * fnic_eth_send() - Send Ethernet frame.
1025  * @fip:        fcoe_ctlr instance.
1026  * @skb:        Ethernet Frame, FIP, without VLAN encapsulation.
1027  */
1028 void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
1029 {
1030         struct fnic *fnic = fnic_from_ctlr(fip);
1031         struct vnic_wq *wq = &fnic->wq[0];
1032         dma_addr_t pa;
1033         struct ethhdr *eth_hdr;
1034         struct vlan_ethhdr *vlan_hdr;
1035         unsigned long flags;
1036 
1037         if (!fnic->vlan_hw_insert) {
1038                 eth_hdr = (struct ethhdr *)skb_mac_header(skb);
1039                 vlan_hdr = skb_push(skb, sizeof(*vlan_hdr) - sizeof(*eth_hdr));
1040                 memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN);
1041                 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
1042                 vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto;
1043                 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
1044                 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
1045                         FNIC_FC_SEND|0x80, (char *)eth_hdr, skb->len)) != 0) {
1046                         printk(KERN_ERR "fnic ctlr frame trace error!!!");
1047                 }
1048         } else {
1049                 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
1050                         FNIC_FC_SEND|0x80, (char *)skb->data, skb->len)) != 0) {
1051                         printk(KERN_ERR "fnic ctlr frame trace error!!!");
1052                 }
1053         }
1054 
1055         pa = dma_map_single(&fnic->pdev->dev, skb->data, skb->len,
1056                         DMA_TO_DEVICE);
1057         if (dma_mapping_error(&fnic->pdev->dev, pa)) {
1058                 printk(KERN_ERR "DMA mapping failed\n");
1059                 goto free_skb;
1060         }
1061 
1062         spin_lock_irqsave(&fnic->wq_lock[0], flags);
1063         if (!vnic_wq_desc_avail(wq))
1064                 goto irq_restore;
1065 
1066         fnic_queue_wq_eth_desc(wq, skb, pa, skb->len,
1067                                0 /* hw inserts cos value */,
1068                                fnic->vlan_id, 1);
1069         spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1070         return;
1071 
1072 irq_restore:
1073         spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1074         dma_unmap_single(&fnic->pdev->dev, pa, skb->len, DMA_TO_DEVICE);
1075 free_skb:
1076         kfree_skb(skb);
1077 }
1078 
1079 /*
1080  * Send FC frame.
1081  */
1082 static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
1083 {
1084         struct vnic_wq *wq = &fnic->wq[0];
1085         struct sk_buff *skb;
1086         dma_addr_t pa;
1087         struct ethhdr *eth_hdr;
1088         struct vlan_ethhdr *vlan_hdr;
1089         struct fcoe_hdr *fcoe_hdr;
1090         struct fc_frame_header *fh;
1091         u32 tot_len, eth_hdr_len;
1092         int ret = 0;
1093         unsigned long flags;
1094 
1095         fh = fc_frame_header_get(fp);
1096         skb = fp_skb(fp);
1097 
1098         if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
1099             fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb))
1100                 return 0;
1101 
1102         if (!fnic->vlan_hw_insert) {
1103                 eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr);
1104                 vlan_hdr = skb_push(skb, eth_hdr_len);
1105                 eth_hdr = (struct ethhdr *)vlan_hdr;
1106                 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
1107                 vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE);
1108                 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
1109                 fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1);
1110         } else {
1111                 eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr);
1112                 eth_hdr = skb_push(skb, eth_hdr_len);
1113                 eth_hdr->h_proto = htons(ETH_P_FCOE);
1114                 fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1);
1115         }
1116 
1117         if (fnic->ctlr.map_dest)
1118                 fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
1119         else
1120                 memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN);
1121         memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN);
1122 
1123         tot_len = skb->len;
1124         BUG_ON(tot_len % 4);
1125 
1126         memset(fcoe_hdr, 0, sizeof(*fcoe_hdr));
1127         fcoe_hdr->fcoe_sof = fr_sof(fp);
1128         if (FC_FCOE_VER)
1129                 FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER);
1130 
1131         pa = dma_map_single(&fnic->pdev->dev, eth_hdr, tot_len, DMA_TO_DEVICE);
1132         if (dma_mapping_error(&fnic->pdev->dev, pa)) {
1133                 ret = -ENOMEM;
1134                 printk(KERN_ERR "DMA map failed with error %d\n", ret);
1135                 goto free_skb_on_err;
1136         }
1137 
1138         if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_SEND,
1139                                 (char *)eth_hdr, tot_len)) != 0) {
1140                 printk(KERN_ERR "fnic ctlr frame trace error!!!");
1141         }
1142 
1143         spin_lock_irqsave(&fnic->wq_lock[0], flags);
1144 
1145         if (!vnic_wq_desc_avail(wq)) {
1146                 dma_unmap_single(&fnic->pdev->dev, pa, tot_len, DMA_TO_DEVICE);
1147                 ret = -1;
1148                 goto irq_restore;
1149         }
1150 
1151         fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
1152                            0 /* hw inserts cos value */,
1153                            fnic->vlan_id, 1, 1, 1);
1154 
1155 irq_restore:
1156         spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1157 
1158 free_skb_on_err:
1159         if (ret)
1160                 dev_kfree_skb_any(fp_skb(fp));
1161 
1162         return ret;
1163 }
1164 
1165 /*
1166  * fnic_send
1167  * Routine to send a raw frame
1168  */
1169 int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
1170 {
1171         struct fnic *fnic = lport_priv(lp);
1172         unsigned long flags;
1173 
1174         if (fnic->in_remove) {
1175                 dev_kfree_skb(fp_skb(fp));
1176                 return -1;
1177         }
1178 
1179         /*
1180          * Queue frame if in a transitional state.
1181          * This occurs while registering the Port_ID / MAC address after FLOGI.
1182          */
1183         spin_lock_irqsave(&fnic->fnic_lock, flags);
1184         if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) {
1185                 skb_queue_tail(&fnic->tx_queue, fp_skb(fp));
1186                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1187                 return 0;
1188         }
1189         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1190 
1191         return fnic_send_frame(fnic, fp);
1192 }
1193 
1194 /**
1195  * fnic_flush_tx() - send queued frames.
1196  * @fnic: fnic device
1197  *
1198  * Send frames that were waiting to go out in FC or Ethernet mode.
1199  * Whenever changing modes we purge queued frames, so these frames should
1200  * be queued for the stable mode that we're in, either FC or Ethernet.
1201  *
1202  * Called without fnic_lock held.
1203  */
1204 void fnic_flush_tx(struct fnic *fnic)
1205 {
1206         struct sk_buff *skb;
1207         struct fc_frame *fp;
1208 
1209         while ((skb = skb_dequeue(&fnic->tx_queue))) {
1210                 fp = (struct fc_frame *)skb;
1211                 fnic_send_frame(fnic, fp);
1212         }
1213 }
1214 
1215 /**
1216  * fnic_set_eth_mode() - put fnic into ethernet mode.
1217  * @fnic: fnic device
1218  *
1219  * Called without fnic lock held.
1220  */
1221 static void fnic_set_eth_mode(struct fnic *fnic)
1222 {
1223         unsigned long flags;
1224         enum fnic_state old_state;
1225         int ret;
1226 
1227         spin_lock_irqsave(&fnic->fnic_lock, flags);
1228 again:
1229         old_state = fnic->state;
1230         switch (old_state) {
1231         case FNIC_IN_FC_MODE:
1232         case FNIC_IN_ETH_TRANS_FC_MODE:
1233         default:
1234                 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
1235                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1236 
1237                 ret = fnic_fw_reset_handler(fnic);
1238 
1239                 spin_lock_irqsave(&fnic->fnic_lock, flags);
1240                 if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE)
1241                         goto again;
1242                 if (ret)
1243                         fnic->state = old_state;
1244                 break;
1245 
1246         case FNIC_IN_FC_TRANS_ETH_MODE:
1247         case FNIC_IN_ETH_MODE:
1248                 break;
1249         }
1250         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1251 }
1252 
1253 static void fnic_wq_complete_frame_send(struct vnic_wq *wq,
1254                                         struct cq_desc *cq_desc,
1255                                         struct vnic_wq_buf *buf, void *opaque)
1256 {
1257         struct sk_buff *skb = buf->os_buf;
1258         struct fc_frame *fp = (struct fc_frame *)skb;
1259         struct fnic *fnic = vnic_dev_priv(wq->vdev);
1260 
1261         dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len,
1262                          DMA_TO_DEVICE);
1263         dev_kfree_skb_irq(fp_skb(fp));
1264         buf->os_buf = NULL;
1265 }
1266 
1267 static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev,
1268                                      struct cq_desc *cq_desc, u8 type,
1269                                      u16 q_number, u16 completed_index,
1270                                      void *opaque)
1271 {
1272         struct fnic *fnic = vnic_dev_priv(vdev);
1273         unsigned long flags;
1274 
1275         spin_lock_irqsave(&fnic->wq_lock[q_number], flags);
1276         vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index,
1277                         fnic_wq_complete_frame_send, NULL);
1278         spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags);
1279 
1280         return 0;
1281 }
1282 
1283 int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do)
1284 {
1285         unsigned int wq_work_done = 0;
1286         unsigned int i;
1287 
1288         for (i = 0; i < fnic->raw_wq_count; i++) {
1289                 wq_work_done  += vnic_cq_service(&fnic->cq[fnic->rq_count+i],
1290                                                  work_to_do,
1291                                                  fnic_wq_cmpl_handler_cont,
1292                                                  NULL);
1293         }
1294 
1295         return wq_work_done;
1296 }
1297 
1298 
1299 void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
1300 {
1301         struct fc_frame *fp = buf->os_buf;
1302         struct fnic *fnic = vnic_dev_priv(wq->vdev);
1303 
1304         dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len,
1305                          DMA_TO_DEVICE);
1306 
1307         dev_kfree_skb(fp_skb(fp));
1308         buf->os_buf = NULL;
1309 }
1310 
1311 void fnic_fcoe_reset_vlans(struct fnic *fnic)
1312 {
1313         unsigned long flags;
1314         struct fcoe_vlan *vlan;
1315         struct fcoe_vlan *next;
1316 
1317         /*
1318          * indicate a link down to fcoe so that all fcf's are free'd
1319          * might not be required since we did this before sending vlan
1320          * discovery request
1321          */
1322         spin_lock_irqsave(&fnic->vlans_lock, flags);
1323         if (!list_empty(&fnic->vlans)) {
1324                 list_for_each_entry_safe(vlan, next, &fnic->vlans, list) {
1325                         list_del(&vlan->list);
1326                         kfree(vlan);
1327                 }
1328         }
1329         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1330 }
1331 
1332 void fnic_handle_fip_timer(struct fnic *fnic)
1333 {
1334         unsigned long flags;
1335         struct fcoe_vlan *vlan;
1336         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1337         u64 sol_time;
1338 
1339         spin_lock_irqsave(&fnic->fnic_lock, flags);
1340         if (fnic->stop_rx_link_events) {
1341                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1342                 return;
1343         }
1344         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1345 
1346         if (fnic->ctlr.mode == FIP_MODE_NON_FIP)
1347                 return;
1348 
1349         spin_lock_irqsave(&fnic->vlans_lock, flags);
1350         if (list_empty(&fnic->vlans)) {
1351                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1352                 /* no vlans available, try again */
1353                 if (printk_ratelimit())
1354                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1355                                   "Start VLAN Discovery\n");
1356                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1357                 return;
1358         }
1359 
1360         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
1361         shost_printk(KERN_DEBUG, fnic->lport->host,
1362                   "fip_timer: vlan %d state %d sol_count %d\n",
1363                   vlan->vid, vlan->state, vlan->sol_count);
1364         switch (vlan->state) {
1365         case FIP_VLAN_USED:
1366                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1367                           "FIP VLAN is selected for FC transaction\n");
1368                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1369                 break;
1370         case FIP_VLAN_FAILED:
1371                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1372                 /* if all vlans are in failed state, restart vlan disc */
1373                 if (printk_ratelimit())
1374                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1375                                   "Start VLAN Discovery\n");
1376                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1377                 break;
1378         case FIP_VLAN_SENT:
1379                 if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) {
1380                         /*
1381                          * no response on this vlan, remove  from the list.
1382                          * Try the next vlan
1383                          */
1384                         shost_printk(KERN_INFO, fnic->lport->host,
1385                                   "Dequeue this VLAN ID %d from list\n",
1386                                   vlan->vid);
1387                         list_del(&vlan->list);
1388                         kfree(vlan);
1389                         vlan = NULL;
1390                         if (list_empty(&fnic->vlans)) {
1391                                 /* we exhausted all vlans, restart vlan disc */
1392                                 spin_unlock_irqrestore(&fnic->vlans_lock,
1393                                                         flags);
1394                                 shost_printk(KERN_INFO, fnic->lport->host,
1395                                           "fip_timer: vlan list empty, "
1396                                           "trigger vlan disc\n");
1397                                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1398                                 return;
1399                         }
1400                         /* check the next vlan */
1401                         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan,
1402                                                         list);
1403                         fnic->set_vlan(fnic, vlan->vid);
1404                         vlan->state = FIP_VLAN_SENT; /* sent now */
1405                 }
1406                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1407                 atomic64_inc(&fnic_stats->vlan_stats.sol_expiry_count);
1408                 vlan->sol_count++;
1409                 sol_time = jiffies + msecs_to_jiffies
1410                                         (FCOE_CTLR_START_DELAY);
1411                 mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
1412                 break;
1413         }
1414 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/scsi/fnic/fnic_fcs.c

DEFINITIONS
