1 /* 2 * Copyright 2008 Cisco Systems, Inc. All rights reserved. 3 * Copyright 2007 Nuova Systems, Inc. All rights reserved. 4 * 5 * This program is free software; you may redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; version 2 of the License. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 16 * SOFTWARE. 17 */ 18 #include <linux/errno.h> 19 #include <linux/pci.h> 20 #include <linux/slab.h> 21 #include <linux/skbuff.h> 22 #include <linux/interrupt.h> 23 #include <linux/spinlock.h> 24 #include <linux/if_ether.h> 25 #include <linux/if_vlan.h> 26 #include <linux/workqueue.h> 27 #include <scsi/fc/fc_fip.h> 28 #include <scsi/fc/fc_els.h> 29 #include <scsi/fc/fc_fcoe.h> 30 #include <scsi/fc_frame.h> 31 #include <scsi/libfc.h> 32 #include "fnic_io.h" 33 #include "fnic.h" 34 #include "fnic_fip.h" 35 #include "cq_enet_desc.h" 36 #include "cq_exch_desc.h" 37 38 static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS; 39 struct workqueue_struct *fnic_fip_queue; 40 struct workqueue_struct *fnic_event_queue; 41 42 static void fnic_set_eth_mode(struct fnic *); 43 static void fnic_fcoe_send_vlan_req(struct fnic *fnic); 44 static void fnic_fcoe_start_fcf_disc(struct fnic *fnic); 45 static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *); 46 static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag); 47 static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb); 48 49 void fnic_handle_link(struct work_struct *work) 50 { 51 struct fnic *fnic = container_of(work, struct fnic, link_work); 52 unsigned long flags; 53 int old_link_status; 54 u32 old_link_down_cnt; 55 56 spin_lock_irqsave(&fnic->fnic_lock, flags); 57 58 if (fnic->stop_rx_link_events) { 59 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 60 return; 61 } 62 63 old_link_down_cnt = fnic->link_down_cnt; 64 old_link_status = fnic->link_status; 65 fnic->link_status = vnic_dev_link_status(fnic->vdev); 66 fnic->link_down_cnt = vnic_dev_link_down_cnt(fnic->vdev); 67 68 switch (vnic_dev_port_speed(fnic->vdev)) { 69 case DCEM_PORTSPEED_10G: 70 fc_host_speed(fnic->lport->host) = FC_PORTSPEED_10GBIT; 71 fnic->lport->link_supported_speeds = FC_PORTSPEED_10GBIT; 72 break; 73 case DCEM_PORTSPEED_25G: 74 fc_host_speed(fnic->lport->host) = FC_PORTSPEED_25GBIT; 75 fnic->lport->link_supported_speeds = FC_PORTSPEED_25GBIT; 76 break; 77 case DCEM_PORTSPEED_40G: 78 case DCEM_PORTSPEED_4x10G: 79 fc_host_speed(fnic->lport->host) = FC_PORTSPEED_40GBIT; 80 fnic->lport->link_supported_speeds = FC_PORTSPEED_40GBIT; 81 break; 82 case DCEM_PORTSPEED_100G: 83 fc_host_speed(fnic->lport->host) = FC_PORTSPEED_100GBIT; 84 fnic->lport->link_supported_speeds = FC_PORTSPEED_100GBIT; 85 break; 86 default: 87 fc_host_speed(fnic->lport->host) = FC_PORTSPEED_UNKNOWN; 88 fnic->lport->link_supported_speeds = FC_PORTSPEED_UNKNOWN; 89 break; 90 } 91 92 if (old_link_status == fnic->link_status) { 93 if (!fnic->link_status) { 94 /* DOWN -> DOWN */ 95 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 96 fnic_fc_trace_set_data(fnic->lport->host->host_no, 97 FNIC_FC_LE, "Link Status: DOWN->DOWN", 98 strlen("Link Status: DOWN->DOWN")); 99 } else { 100 if (old_link_down_cnt != fnic->link_down_cnt) { 101 /* UP -> DOWN -> UP */ 102 fnic->lport->host_stats.link_failure_count++; 103 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 104 fnic_fc_trace_set_data( 105 fnic->lport->host->host_no, 106 FNIC_FC_LE, 107 "Link Status:UP_DOWN_UP", 108 strlen("Link_Status:UP_DOWN_UP") 109 ); 110 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, 111 "link down\n"); 112 fcoe_ctlr_link_down(&fnic->ctlr); 113 if (fnic->config.flags & VFCF_FIP_CAPABLE) { 114 /* start FCoE VLAN discovery */ 115 fnic_fc_trace_set_data( 116 fnic->lport->host->host_no, 117 FNIC_FC_LE, 118 "Link Status: UP_DOWN_UP_VLAN", 119 strlen( 120 "Link Status: UP_DOWN_UP_VLAN") 121 ); 122 fnic_fcoe_send_vlan_req(fnic); 123 return; 124 } 125 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, 126 "link up\n"); 127 fcoe_ctlr_link_up(&fnic->ctlr); 128 } else { 129 /* UP -> UP */ 130 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 131 fnic_fc_trace_set_data( 132 fnic->lport->host->host_no, FNIC_FC_LE, 133 "Link Status: UP_UP", 134 strlen("Link Status: UP_UP")); 135 } 136 } 137 } else if (fnic->link_status) { 138 /* DOWN -> UP */ 139 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 140 if (fnic->config.flags & VFCF_FIP_CAPABLE) { 141 /* start FCoE VLAN discovery */ 142 fnic_fc_trace_set_data( 143 fnic->lport->host->host_no, 144 FNIC_FC_LE, "Link Status: DOWN_UP_VLAN", 145 strlen("Link Status: DOWN_UP_VLAN")); 146 fnic_fcoe_send_vlan_req(fnic); 147 return; 148 } 149 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n"); 150 fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_LE, 151 "Link Status: DOWN_UP", strlen("Link Status: DOWN_UP")); 152 fcoe_ctlr_link_up(&fnic->ctlr); 153 } else { 154 /* UP -> DOWN */ 155 fnic->lport->host_stats.link_failure_count++; 156 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 157 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link down\n"); 158 fnic_fc_trace_set_data( 159 fnic->lport->host->host_no, FNIC_FC_LE, 160 "Link Status: UP_DOWN", 161 strlen("Link Status: UP_DOWN")); 162 if (fnic->config.flags & VFCF_FIP_CAPABLE) { 163 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, 164 "deleting fip-timer during link-down\n"); 165 del_timer_sync(&fnic->fip_timer); 166 } 167 fcoe_ctlr_link_down(&fnic->ctlr); 168 } 169 170 } 171 172 /* 173 * This function passes incoming fabric frames to libFC 174 */ 175 void fnic_handle_frame(struct work_struct *work) 176 { 177 struct fnic *fnic = container_of(work, struct fnic, frame_work); 178 struct fc_lport *lp = fnic->lport; 179 unsigned long flags; 180 struct sk_buff *skb; 181 struct fc_frame *fp; 182 183 while ((skb = skb_dequeue(&fnic->frame_queue))) { 184 185 spin_lock_irqsave(&fnic->fnic_lock, flags); 186 if (fnic->stop_rx_link_events) { 187 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 188 dev_kfree_skb(skb); 189 return; 190 } 191 fp = (struct fc_frame *)skb; 192 193 /* 194 * If we're in a transitional state, just re-queue and return. 195 * The queue will be serviced when we get to a stable state. 196 */ 197 if (fnic->state != FNIC_IN_FC_MODE && 198 fnic->state != FNIC_IN_ETH_MODE) { 199 skb_queue_head(&fnic->frame_queue, skb); 200 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 201 return; 202 } 203 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 204 205 fc_exch_recv(lp, fp); 206 } 207 } 208 209 void fnic_fcoe_evlist_free(struct fnic *fnic) 210 { 211 struct fnic_event *fevt = NULL; 212 struct fnic_event *next = NULL; 213 unsigned long flags; 214 215 spin_lock_irqsave(&fnic->fnic_lock, flags); 216 if (list_empty(&fnic->evlist)) { 217 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 218 return; 219 } 220 221 list_for_each_entry_safe(fevt, next, &fnic->evlist, list) { 222 list_del(&fevt->list); 223 kfree(fevt); 224 } 225 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 226 } 227 228 void fnic_handle_event(struct work_struct *work) 229 { 230 struct fnic *fnic = container_of(work, struct fnic, event_work); 231 struct fnic_event *fevt = NULL; 232 struct fnic_event *next = NULL; 233 unsigned long flags; 234 235 spin_lock_irqsave(&fnic->fnic_lock, flags); 236 if (list_empty(&fnic->evlist)) { 237 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 238 return; 239 } 240 241 list_for_each_entry_safe(fevt, next, &fnic->evlist, list) { 242 if (fnic->stop_rx_link_events) { 243 list_del(&fevt->list); 244 kfree(fevt); 245 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 246 return; 247 } 248 /* 249 * If we're in a transitional state, just re-queue and return. 250 * The queue will be serviced when we get to a stable state. 251 */ 252 if (fnic->state != FNIC_IN_FC_MODE && 253 fnic->state != FNIC_IN_ETH_MODE) { 254 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 255 return; 256 } 257 258 list_del(&fevt->list); 259 switch (fevt->event) { 260 case FNIC_EVT_START_VLAN_DISC: 261 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 262 fnic_fcoe_send_vlan_req(fnic); 263 spin_lock_irqsave(&fnic->fnic_lock, flags); 264 break; 265 case FNIC_EVT_START_FCF_DISC: 266 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, 267 "Start FCF Discovery\n"); 268 fnic_fcoe_start_fcf_disc(fnic); 269 break; 270 default: 271 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, 272 "Unknown event 0x%x\n", fevt->event); 273 break; 274 } 275 kfree(fevt); 276 } 277 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 278 } 279 280 /** 281 * Check if the Received FIP FLOGI frame is rejected 282 * @fip: The FCoE controller that received the frame 283 * @skb: The received FIP frame 284 * 285 * Returns non-zero if the frame is rejected with unsupported cmd with 286 * insufficient resource els explanation. 287 */ 288 static inline int is_fnic_fip_flogi_reject(struct fcoe_ctlr *fip, 289 struct sk_buff *skb) 290 { 291 struct fc_lport *lport = fip->lp; 292 struct fip_header *fiph; 293 struct fc_frame_header *fh = NULL; 294 struct fip_desc *desc; 295 struct fip_encaps *els; 296 enum fip_desc_type els_dtype = 0; 297 u16 op; 298 u8 els_op; 299 u8 sub; 300 301 size_t els_len = 0; 302 size_t rlen; 303 size_t dlen = 0; 304 305 if (skb_linearize(skb)) 306 return 0; 307 308 if (skb->len < sizeof(*fiph)) 309 return 0; 310 311 fiph = (struct fip_header *)skb->data; 312 op = ntohs(fiph->fip_op); 313 sub = fiph->fip_subcode; 314 315 if (op != FIP_OP_LS) 316 return 0; 317 318 if (sub != FIP_SC_REP) 319 return 0; 320 321 rlen = ntohs(fiph->fip_dl_len) * 4; 322 if (rlen + sizeof(*fiph) > skb->len) 323 return 0; 324 325 desc = (struct fip_desc *)(fiph + 1); 326 dlen = desc->fip_dlen * FIP_BPW; 327 328 if (desc->fip_dtype == FIP_DT_FLOGI) { 329 330 if (dlen < sizeof(*els) + sizeof(*fh) + 1) 331 return 0; 332 333 els_len = dlen - sizeof(*els); 334 els = (struct fip_encaps *)desc; 335 fh = (struct fc_frame_header *)(els + 1); 336 els_dtype = desc->fip_dtype; 337 338 if (!fh) 339 return 0; 340 341 /* 342 * ELS command code, reason and explanation should be = Reject, 343 * unsupported command and insufficient resource 344 */ 345 els_op = *(u8 *)(fh + 1); 346 if (els_op == ELS_LS_RJT) { 347 shost_printk(KERN_INFO, lport->host, 348 "Flogi Request Rejected by Switch\n"); 349 return 1; 350 } 351 shost_printk(KERN_INFO, lport->host, 352 "Flogi Request Accepted by Switch\n"); 353 } 354 return 0; 355 } 356 357 static void fnic_fcoe_send_vlan_req(struct fnic *fnic) 358 { 359 struct fcoe_ctlr *fip = &fnic->ctlr; 360 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 361 struct sk_buff *skb; 362 char *eth_fr; 363 int fr_len; 364 struct fip_vlan *vlan; 365 u64 vlan_tov; 366 367 fnic_fcoe_reset_vlans(fnic); 368 fnic->set_vlan(fnic, 0); 369 370 if (printk_ratelimit()) 371 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, 372 "Sending VLAN request...\n"); 373 374 skb = dev_alloc_skb(sizeof(struct fip_vlan)); 375 if (!skb) 376 return; 377 378 fr_len = sizeof(*vlan); 379 eth_fr = (char *)skb->data; 380 vlan = (struct fip_vlan *)eth_fr; 381 382 memset(vlan, 0, sizeof(*vlan)); 383 memcpy(vlan->eth.h_source, fip->ctl_src_addr, ETH_ALEN); 384 memcpy(vlan->eth.h_dest, fcoe_all_fcfs, ETH_ALEN); 385 vlan->eth.h_proto = htons(ETH_P_FIP); 386 387 vlan->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); 388 vlan->fip.fip_op = htons(FIP_OP_VLAN); 389 vlan->fip.fip_subcode = FIP_SC_VL_REQ; 390 vlan->fip.fip_dl_len = htons(sizeof(vlan->desc) / FIP_BPW); 391 392 vlan->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC; 393 vlan->desc.mac.fd_desc.fip_dlen = sizeof(vlan->desc.mac) / FIP_BPW; 394 memcpy(&vlan->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); 395 396 vlan->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME; 397 vlan->desc.wwnn.fd_desc.fip_dlen = sizeof(vlan->desc.wwnn) / FIP_BPW; 398 put_unaligned_be64(fip->lp->wwnn, &vlan->desc.wwnn.fd_wwn); 399 atomic64_inc(&fnic_stats->vlan_stats.vlan_disc_reqs); 400 401 skb_put(skb, sizeof(*vlan)); 402 skb->protocol = htons(ETH_P_FIP); 403 skb_reset_mac_header(skb); 404 skb_reset_network_header(skb); 405 fip->send(fip, skb); 406 407 /* set a timer so that we can retry if there no response */ 408 vlan_tov = jiffies + msecs_to_jiffies(FCOE_CTLR_FIPVLAN_TOV); 409 mod_timer(&fnic->fip_timer, round_jiffies(vlan_tov)); 410 } 411 412 static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *skb) 413 { 414 struct fcoe_ctlr *fip = &fnic->ctlr; 415 struct fip_header *fiph; 416 struct fip_desc *desc; 417 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 418 u16 vid; 419 size_t rlen; 420 size_t dlen; 421 struct fcoe_vlan *vlan; 422 u64 sol_time; 423 unsigned long flags; 424 425 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, 426 "Received VLAN response...\n"); 427 428 fiph = (struct fip_header *) skb->data; 429 430 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, 431 "Received VLAN response... OP 0x%x SUB_OP 0x%x\n", 432 ntohs(fiph->fip_op), fiph->fip_subcode); 433 434 rlen = ntohs(fiph->fip_dl_len) * 4; 435 fnic_fcoe_reset_vlans(fnic); 436 spin_lock_irqsave(&fnic->vlans_lock, flags); 437 desc = (struct fip_desc *)(fiph + 1); 438 while (rlen > 0) { 439 dlen = desc->fip_dlen * FIP_BPW; 440 switch (desc->fip_dtype) { 441 case FIP_DT_VLAN: 442 vid = ntohs(((struct fip_vlan_desc *)desc)->fd_vlan); 443 shost_printk(KERN_INFO, fnic->lport->host, 444 "process_vlan_resp: FIP VLAN %d\n", vid); 445 vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC); 446 if (!vlan) { 447 /* retry from timer */ 448 spin_unlock_irqrestore(&fnic->vlans_lock, 449 flags); 450 goto out; 451 } 452 vlan->vid = vid & 0x0fff; 453 vlan->state = FIP_VLAN_AVAIL; 454 list_add_tail(&vlan->list, &fnic->vlans); 455 break; 456 } 457 desc = (struct fip_desc *)((char *)desc + dlen); 458 rlen -= dlen; 459 } 460 461 /* any VLAN descriptors present ? */ 462 if (list_empty(&fnic->vlans)) { 463 /* retry from timer */ 464 atomic64_inc(&fnic_stats->vlan_stats.resp_withno_vlanID); 465 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, 466 "No VLAN descriptors in FIP VLAN response\n"); 467 spin_unlock_irqrestore(&fnic->vlans_lock, flags); 468 goto out; 469 } 470 471 vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); 472 fnic->set_vlan(fnic, vlan->vid); 473 vlan->state = FIP_VLAN_SENT; /* sent now */ 474 vlan->sol_count++; 475 spin_unlock_irqrestore(&fnic->vlans_lock, flags); 476 477 /* start the solicitation */ 478 fcoe_ctlr_link_up(fip); 479 480 sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY); 481 mod_timer(&fnic->fip_timer, round_jiffies(sol_time)); 482 out: 483 return; 484 } 485 486 static void fnic_fcoe_start_fcf_disc(struct fnic *fnic) 487 { 488 unsigned long flags; 489 struct fcoe_vlan *vlan; 490 u64 sol_time; 491 492 spin_lock_irqsave(&fnic->vlans_lock, flags); 493 vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); 494 fnic->set_vlan(fnic, vlan->vid); 495 vlan->state = FIP_VLAN_SENT; /* sent now */ 496 vlan->sol_count = 1; 497 spin_unlock_irqrestore(&fnic->vlans_lock, flags); 498 499 /* start the solicitation */ 500 fcoe_ctlr_link_up(&fnic->ctlr); 501 502 sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY); 503 mod_timer(&fnic->fip_timer, round_jiffies(sol_time)); 504 } 505 506 static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag) 507 { 508 unsigned long flags; 509 struct fcoe_vlan *fvlan; 510 511 spin_lock_irqsave(&fnic->vlans_lock, flags); 512 if (list_empty(&fnic->vlans)) { 513 spin_unlock_irqrestore(&fnic->vlans_lock, flags); 514 return -EINVAL; 515 } 516 517 fvlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); 518 if (fvlan->state == FIP_VLAN_USED) { 519 spin_unlock_irqrestore(&fnic->vlans_lock, flags); 520 return 0; 521 } 522 523 if (fvlan->state == FIP_VLAN_SENT) { 524 fvlan->state = FIP_VLAN_USED; 525 spin_unlock_irqrestore(&fnic->vlans_lock, flags); 526 return 0; 527 } 528 spin_unlock_irqrestore(&fnic->vlans_lock, flags); 529 return -EINVAL; 530 } 531 532 static void fnic_event_enq(struct fnic *fnic, enum fnic_evt ev) 533 { 534 struct fnic_event *fevt; 535 unsigned long flags; 536 537 fevt = kmalloc(sizeof(*fevt), GFP_ATOMIC); 538 if (!fevt) 539 return; 540 541 fevt->fnic = fnic; 542 fevt->event = ev; 543 544 spin_lock_irqsave(&fnic->fnic_lock, flags); 545 list_add_tail(&fevt->list, &fnic->evlist); 546 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 547 548 schedule_work(&fnic->event_work); 549 } 550 551 static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb) 552 { 553 struct fip_header *fiph; 554 int ret = 1; 555 u16 op; 556 u8 sub; 557 558 if (!skb || !(skb->data)) 559 return -1; 560 561 if (skb_linearize(skb)) 562 goto drop; 563 564 fiph = (struct fip_header *)skb->data; 565 op = ntohs(fiph->fip_op); 566 sub = fiph->fip_subcode; 567 568 if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER) 569 goto drop; 570 571 if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len) 572 goto drop; 573 574 if (op == FIP_OP_DISC && sub == FIP_SC_ADV) { 575 if (fnic_fcoe_vlan_check(fnic, ntohs(fiph->fip_flags))) 576 goto drop; 577 /* pass it on to fcoe */ 578 ret = 1; 579 } else if (op == FIP_OP_VLAN && sub == FIP_SC_VL_NOTE) { 580 /* set the vlan as used */ 581 fnic_fcoe_process_vlan_resp(fnic, skb); 582 ret = 0; 583 } else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) { 584 /* received CVL request, restart vlan disc */ 585 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); 586 /* pass it on to fcoe */ 587 ret = 1; 588 } 589 drop: 590 return ret; 591 } 592 593 void fnic_handle_fip_frame(struct work_struct *work) 594 { 595 struct fnic *fnic = container_of(work, struct fnic, fip_frame_work); 596 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 597 unsigned long flags; 598 struct sk_buff *skb; 599 struct ethhdr *eh; 600 601 while ((skb = skb_dequeue(&fnic->fip_frame_queue))) { 602 spin_lock_irqsave(&fnic->fnic_lock, flags); 603 if (fnic->stop_rx_link_events) { 604 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 605 dev_kfree_skb(skb); 606 return; 607 } 608 /* 609 * If we're in a transitional state, just re-queue and return. 610 * The queue will be serviced when we get to a stable state. 611 */ 612 if (fnic->state != FNIC_IN_FC_MODE && 613 fnic->state != FNIC_IN_ETH_MODE) { 614 skb_queue_head(&fnic->fip_frame_queue, skb); 615 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 616 return; 617 } 618 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 619 eh = (struct ethhdr *)skb->data; 620 if (eh->h_proto == htons(ETH_P_FIP)) { 621 skb_pull(skb, sizeof(*eh)); 622 if (fnic_fcoe_handle_fip_frame(fnic, skb) <= 0) { 623 dev_kfree_skb(skb); 624 continue; 625 } 626 /* 627 * If there's FLOGI rejects - clear all 628 * fcf's & restart from scratch 629 */ 630 if (is_fnic_fip_flogi_reject(&fnic->ctlr, skb)) { 631 atomic64_inc( 632 &fnic_stats->vlan_stats.flogi_rejects); 633 shost_printk(KERN_INFO, fnic->lport->host, 634 "Trigger a Link down - VLAN Disc\n"); 635 fcoe_ctlr_link_down(&fnic->ctlr); 636 /* start FCoE VLAN discovery */ 637 fnic_fcoe_send_vlan_req(fnic); 638 dev_kfree_skb(skb); 639 continue; 640 } 641 fcoe_ctlr_recv(&fnic->ctlr, skb); 642 continue; 643 } 644 } 645 } 646 647 /** 648 * fnic_import_rq_eth_pkt() - handle received FCoE or FIP frame. 649 * @fnic: fnic instance. 650 * @skb: Ethernet Frame. 651 */ 652 static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb) 653 { 654 struct fc_frame *fp; 655 struct ethhdr *eh; 656 struct fcoe_hdr *fcoe_hdr; 657 struct fcoe_crc_eof *ft; 658 659 /* 660 * Undo VLAN encapsulation if present. 661 */ 662 eh = (struct ethhdr *)skb->data; 663 if (eh->h_proto == htons(ETH_P_8021Q)) { 664 memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2); 665 eh = skb_pull(skb, VLAN_HLEN); 666 skb_reset_mac_header(skb); 667 } 668 if (eh->h_proto == htons(ETH_P_FIP)) { 669 if (!(fnic->config.flags & VFCF_FIP_CAPABLE)) { 670 printk(KERN_ERR "Dropped FIP frame, as firmware " 671 "uses non-FIP mode, Enable FIP " 672 "using UCSM\n"); 673 goto drop; 674 } 675 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, 676 FNIC_FC_RECV|0x80, (char *)skb->data, skb->len)) != 0) { 677 printk(KERN_ERR "fnic ctlr frame trace error!!!"); 678 } 679 skb_queue_tail(&fnic->fip_frame_queue, skb); 680 queue_work(fnic_fip_queue, &fnic->fip_frame_work); 681 return 1; /* let caller know packet was used */ 682 } 683 if (eh->h_proto != htons(ETH_P_FCOE)) 684 goto drop; 685 skb_set_network_header(skb, sizeof(*eh)); 686 skb_pull(skb, sizeof(*eh)); 687 688 fcoe_hdr = (struct fcoe_hdr *)skb->data; 689 if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER) 690 goto drop; 691 692 fp = (struct fc_frame *)skb; 693 fc_frame_init(fp); 694 fr_sof(fp) = fcoe_hdr->fcoe_sof; 695 skb_pull(skb, sizeof(struct fcoe_hdr)); 696 skb_reset_transport_header(skb); 697 698 ft = (struct fcoe_crc_eof *)(skb->data + skb->len - sizeof(*ft)); 699 fr_eof(fp) = ft->fcoe_eof; 700 skb_trim(skb, skb->len - sizeof(*ft)); 701 return 0; 702 drop: 703 dev_kfree_skb_irq(skb); 704 return -1; 705 } 706 707 /** 708 * fnic_update_mac_locked() - set data MAC address and filters. 709 * @fnic: fnic instance. 710 * @new: newly-assigned FCoE MAC address. 711 * 712 * Called with the fnic lock held. 713 */ 714 void fnic_update_mac_locked(struct fnic *fnic, u8 *new) 715 { 716 u8 *ctl = fnic->ctlr.ctl_src_addr; 717 u8 *data = fnic->data_src_addr; 718 719 if (is_zero_ether_addr(new)) 720 new = ctl; 721 if (ether_addr_equal(data, new)) 722 return; 723 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n", new); 724 if (!is_zero_ether_addr(data) && !ether_addr_equal(data, ctl)) 725 vnic_dev_del_addr(fnic->vdev, data); 726 memcpy(data, new, ETH_ALEN); 727 if (!ether_addr_equal(new, ctl)) 728 vnic_dev_add_addr(fnic->vdev, new); 729 } 730 731 /** 732 * fnic_update_mac() - set data MAC address and filters. 733 * @lport: local port. 734 * @new: newly-assigned FCoE MAC address. 735 */ 736 void fnic_update_mac(struct fc_lport *lport, u8 *new) 737 { 738 struct fnic *fnic = lport_priv(lport); 739 740 spin_lock_irq(&fnic->fnic_lock); 741 fnic_update_mac_locked(fnic, new); 742 spin_unlock_irq(&fnic->fnic_lock); 743 } 744 745 /** 746 * fnic_set_port_id() - set the port_ID after successful FLOGI. 747 * @lport: local port. 748 * @port_id: assigned FC_ID. 749 * @fp: received frame containing the FLOGI accept or NULL. 750 * 751 * This is called from libfc when a new FC_ID has been assigned. 752 * This causes us to reset the firmware to FC_MODE and setup the new MAC 753 * address and FC_ID. 754 * 755 * It is also called with FC_ID 0 when we're logged off. 756 * 757 * If the FC_ID is due to point-to-point, fp may be NULL. 758 */ 759 void fnic_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp) 760 { 761 struct fnic *fnic = lport_priv(lport); 762 u8 *mac; 763 int ret; 764 765 FNIC_FCS_DBG(KERN_DEBUG, lport->host, "set port_id %x fp %p\n", 766 port_id, fp); 767 768 /* 769 * If we're clearing the FC_ID, change to use the ctl_src_addr. 770 * Set ethernet mode to send FLOGI. 771 */ 772 if (!port_id) { 773 fnic_update_mac(lport, fnic->ctlr.ctl_src_addr); 774 fnic_set_eth_mode(fnic); 775 return; 776 } 777 778 if (fp) { 779 mac = fr_cb(fp)->granted_mac; 780 if (is_zero_ether_addr(mac)) { 781 /* non-FIP - FLOGI already accepted - ignore return */ 782 fcoe_ctlr_recv_flogi(&fnic->ctlr, lport, fp); 783 } 784 fnic_update_mac(lport, mac); 785 } 786 787 /* Change state to reflect transition to FC mode */ 788 spin_lock_irq(&fnic->fnic_lock); 789 if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE) 790 fnic->state = FNIC_IN_ETH_TRANS_FC_MODE; 791 else { 792 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, 793 "Unexpected fnic state %s while" 794 " processing flogi resp\n", 795 fnic_state_to_str(fnic->state)); 796 spin_unlock_irq(&fnic->fnic_lock); 797 return; 798 } 799 spin_unlock_irq(&fnic->fnic_lock); 800 801 /* 802 * Send FLOGI registration to firmware to set up FC mode. 803 * The new address will be set up when registration completes. 804 */ 805 ret = fnic_flogi_reg_handler(fnic, port_id); 806 807 if (ret < 0) { 808 spin_lock_irq(&fnic->fnic_lock); 809 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) 810 fnic->state = FNIC_IN_ETH_MODE; 811 spin_unlock_irq(&fnic->fnic_lock); 812 } 813 } 814 815 static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc 816 *cq_desc, struct vnic_rq_buf *buf, 817 int skipped __attribute__((unused)), 818 void *opaque) 819 { 820 struct fnic *fnic = vnic_dev_priv(rq->vdev); 821 struct sk_buff *skb; 822 struct fc_frame *fp; 823 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 824 unsigned int eth_hdrs_stripped; 825 u8 type, color, eop, sop, ingress_port, vlan_stripped; 826 u8 fcoe = 0, fcoe_sof, fcoe_eof; 827 u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0; 828 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; 829 u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc; 830 u8 fcs_ok = 1, packet_error = 0; 831 u16 q_number, completed_index, bytes_written = 0, vlan, checksum; 832 u32 rss_hash; 833 u16 exchange_id, tmpl; 834 u8 sof = 0; 835 u8 eof = 0; 836 u32 fcp_bytes_written = 0; 837 unsigned long flags; 838 839 pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len, 840 PCI_DMA_FROMDEVICE); 841 skb = buf->os_buf; 842 fp = (struct fc_frame *)skb; 843 buf->os_buf = NULL; 844 845 cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index); 846 if (type == CQ_DESC_TYPE_RQ_FCP) { 847 cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc, 848 &type, &color, &q_number, &completed_index, 849 &eop, &sop, &fcoe_fc_crc_ok, &exchange_id, 850 &tmpl, &fcp_bytes_written, &sof, &eof, 851 &ingress_port, &packet_error, 852 &fcoe_enc_error, &fcs_ok, &vlan_stripped, 853 &vlan); 854 eth_hdrs_stripped = 1; 855 skb_trim(skb, fcp_bytes_written); 856 fr_sof(fp) = sof; 857 fr_eof(fp) = eof; 858 859 } else if (type == CQ_DESC_TYPE_RQ_ENET) { 860 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, 861 &type, &color, &q_number, &completed_index, 862 &ingress_port, &fcoe, &eop, &sop, 863 &rss_type, &csum_not_calc, &rss_hash, 864 &bytes_written, &packet_error, 865 &vlan_stripped, &vlan, &checksum, 866 &fcoe_sof, &fcoe_fc_crc_ok, 867 &fcoe_enc_error, &fcoe_eof, 868 &tcp_udp_csum_ok, &udp, &tcp, 869 &ipv4_csum_ok, &ipv6, &ipv4, 870 &ipv4_fragment, &fcs_ok); 871 eth_hdrs_stripped = 0; 872 skb_trim(skb, bytes_written); 873 if (!fcs_ok) { 874 atomic64_inc(&fnic_stats->misc_stats.frame_errors); 875 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, 876 "fcs error. dropping packet.\n"); 877 goto drop; 878 } 879 if (fnic_import_rq_eth_pkt(fnic, skb)) 880 return; 881 882 } else { 883 /* wrong CQ type*/ 884 shost_printk(KERN_ERR, fnic->lport->host, 885 "fnic rq_cmpl wrong cq type x%x\n", type); 886 goto drop; 887 } 888 889 if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) { 890 atomic64_inc(&fnic_stats->misc_stats.frame_errors); 891 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, 892 "fnic rq_cmpl fcoe x%x fcsok x%x" 893 " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err" 894 " x%x\n", 895 fcoe, fcs_ok, packet_error, 896 fcoe_fc_crc_ok, fcoe_enc_error); 897 goto drop; 898 } 899 900 spin_lock_irqsave(&fnic->fnic_lock, flags); 901 if (fnic->stop_rx_link_events) { 902 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 903 goto drop; 904 } 905 fr_dev(fp) = fnic->lport; 906 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 907 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_RECV, 908 (char *)skb->data, skb->len)) != 0) { 909 printk(KERN_ERR "fnic ctlr frame trace error!!!"); 910 } 911 912 skb_queue_tail(&fnic->frame_queue, skb); 913 queue_work(fnic_event_queue, &fnic->frame_work); 914 915 return; 916 drop: 917 dev_kfree_skb_irq(skb); 918 } 919 920 static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev, 921 struct cq_desc *cq_desc, u8 type, 922 u16 q_number, u16 completed_index, 923 void *opaque) 924 { 925 struct fnic *fnic = vnic_dev_priv(vdev); 926 927 vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index, 928 VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv, 929 NULL); 930 return 0; 931 } 932 933 int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do) 934 { 935 unsigned int tot_rq_work_done = 0, cur_work_done; 936 unsigned int i; 937 int err; 938 939 for (i = 0; i < fnic->rq_count; i++) { 940 cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do, 941 fnic_rq_cmpl_handler_cont, 942 NULL); 943 if (cur_work_done) { 944 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame); 945 if (err) 946 shost_printk(KERN_ERR, fnic->lport->host, 947 "fnic_alloc_rq_frame can't alloc" 948 " frame\n"); 949 } 950 tot_rq_work_done += cur_work_done; 951 } 952 953 return tot_rq_work_done; 954 } 955 956 /* 957 * This function is called once at init time to allocate and fill RQ 958 * buffers. Subsequently, it is called in the interrupt context after RQ 959 * buffer processing to replenish the buffers in the RQ 960 */ 961 int fnic_alloc_rq_frame(struct vnic_rq *rq) 962 { 963 struct fnic *fnic = vnic_dev_priv(rq->vdev); 964 struct sk_buff *skb; 965 u16 len; 966 dma_addr_t pa; 967 int r; 968 969 len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM; 970 skb = dev_alloc_skb(len); 971 if (!skb) { 972 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, 973 "Unable to allocate RQ sk_buff\n"); 974 return -ENOMEM; 975 } 976 skb_reset_mac_header(skb); 977 skb_reset_transport_header(skb); 978 skb_reset_network_header(skb); 979 skb_put(skb, len); 980 pa = pci_map_single(fnic->pdev, skb->data, len, PCI_DMA_FROMDEVICE); 981 982 if (pci_dma_mapping_error(fnic->pdev, pa)) { 983 r = -ENOMEM; 984 printk(KERN_ERR "PCI mapping failed with error %d\n", r); 985 goto free_skb; 986 } 987 988 fnic_queue_rq_desc(rq, skb, pa, len); 989 return 0; 990 991 free_skb: 992 kfree_skb(skb); 993 return r; 994 } 995 996 void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) 997 { 998 struct fc_frame *fp = buf->os_buf; 999 struct fnic *fnic = vnic_dev_priv(rq->vdev); 1000 1001 pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len, 1002 PCI_DMA_FROMDEVICE); 1003 1004 dev_kfree_skb(fp_skb(fp)); 1005 buf->os_buf = NULL; 1006 } 1007 1008 /** 1009 * fnic_eth_send() - Send Ethernet frame. 1010 * @fip: fcoe_ctlr instance. 1011 * @skb: Ethernet Frame, FIP, without VLAN encapsulation. 1012 */ 1013 void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb) 1014 { 1015 struct fnic *fnic = fnic_from_ctlr(fip); 1016 struct vnic_wq *wq = &fnic->wq[0]; 1017 dma_addr_t pa; 1018 struct ethhdr *eth_hdr; 1019 struct vlan_ethhdr *vlan_hdr; 1020 unsigned long flags; 1021 int r; 1022 1023 if (!fnic->vlan_hw_insert) { 1024 eth_hdr = (struct ethhdr *)skb_mac_header(skb); 1025 vlan_hdr = skb_push(skb, sizeof(*vlan_hdr) - sizeof(*eth_hdr)); 1026 memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN); 1027 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q); 1028 vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto; 1029 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id); 1030 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, 1031 FNIC_FC_SEND|0x80, (char *)eth_hdr, skb->len)) != 0) { 1032 printk(KERN_ERR "fnic ctlr frame trace error!!!"); 1033 } 1034 } else { 1035 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, 1036 FNIC_FC_SEND|0x80, (char *)skb->data, skb->len)) != 0) { 1037 printk(KERN_ERR "fnic ctlr frame trace error!!!"); 1038 } 1039 } 1040 1041 pa = pci_map_single(fnic->pdev, skb->data, skb->len, PCI_DMA_TODEVICE); 1042 1043 r = pci_dma_mapping_error(fnic->pdev, pa); 1044 if (r) { 1045 printk(KERN_ERR "PCI mapping failed with error %d\n", r); 1046 goto free_skb; 1047 } 1048 1049 spin_lock_irqsave(&fnic->wq_lock[0], flags); 1050 if (!vnic_wq_desc_avail(wq)) 1051 goto irq_restore; 1052 1053 fnic_queue_wq_eth_desc(wq, skb, pa, skb->len, 1054 0 /* hw inserts cos value */, 1055 fnic->vlan_id, 1); 1056 spin_unlock_irqrestore(&fnic->wq_lock[0], flags); 1057 return; 1058 1059 irq_restore: 1060 spin_unlock_irqrestore(&fnic->wq_lock[0], flags); 1061 pci_unmap_single(fnic->pdev, pa, skb->len, PCI_DMA_TODEVICE); 1062 free_skb: 1063 kfree_skb(skb); 1064 } 1065 1066 /* 1067 * Send FC frame. 1068 */ 1069 static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp) 1070 { 1071 struct vnic_wq *wq = &fnic->wq[0]; 1072 struct sk_buff *skb; 1073 dma_addr_t pa; 1074 struct ethhdr *eth_hdr; 1075 struct vlan_ethhdr *vlan_hdr; 1076 struct fcoe_hdr *fcoe_hdr; 1077 struct fc_frame_header *fh; 1078 u32 tot_len, eth_hdr_len; 1079 int ret = 0; 1080 unsigned long flags; 1081 1082 fh = fc_frame_header_get(fp); 1083 skb = fp_skb(fp); 1084 1085 if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) && 1086 fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb)) 1087 return 0; 1088 1089 if (!fnic->vlan_hw_insert) { 1090 eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr); 1091 vlan_hdr = skb_push(skb, eth_hdr_len); 1092 eth_hdr = (struct ethhdr *)vlan_hdr; 1093 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q); 1094 vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE); 1095 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id); 1096 fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1); 1097 } else { 1098 eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr); 1099 eth_hdr = skb_push(skb, eth_hdr_len); 1100 eth_hdr->h_proto = htons(ETH_P_FCOE); 1101 fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1); 1102 } 1103 1104 if (fnic->ctlr.map_dest) 1105 fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id); 1106 else 1107 memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN); 1108 memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN); 1109 1110 tot_len = skb->len; 1111 BUG_ON(tot_len % 4); 1112 1113 memset(fcoe_hdr, 0, sizeof(*fcoe_hdr)); 1114 fcoe_hdr->fcoe_sof = fr_sof(fp); 1115 if (FC_FCOE_VER) 1116 FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER); 1117 1118 pa = pci_map_single(fnic->pdev, eth_hdr, tot_len, PCI_DMA_TODEVICE); 1119 1120 if (pci_dma_mapping_error(fnic->pdev, pa)) { 1121 ret = -ENOMEM; 1122 printk(KERN_ERR "DMA map failed with error %d\n", ret); 1123 goto free_skb_on_err; 1124 } 1125 1126 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_SEND, 1127 (char *)eth_hdr, tot_len)) != 0) { 1128 printk(KERN_ERR "fnic ctlr frame trace error!!!"); 1129 } 1130 1131 spin_lock_irqsave(&fnic->wq_lock[0], flags); 1132 1133 if (!vnic_wq_desc_avail(wq)) { 1134 pci_unmap_single(fnic->pdev, pa, 1135 tot_len, PCI_DMA_TODEVICE); 1136 ret = -1; 1137 goto irq_restore; 1138 } 1139 1140 fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp), 1141 0 /* hw inserts cos value */, 1142 fnic->vlan_id, 1, 1, 1); 1143 1144 irq_restore: 1145 spin_unlock_irqrestore(&fnic->wq_lock[0], flags); 1146 1147 free_skb_on_err: 1148 if (ret) 1149 dev_kfree_skb_any(fp_skb(fp)); 1150 1151 return ret; 1152 } 1153 1154 /* 1155 * fnic_send 1156 * Routine to send a raw frame 1157 */ 1158 int fnic_send(struct fc_lport *lp, struct fc_frame *fp) 1159 { 1160 struct fnic *fnic = lport_priv(lp); 1161 unsigned long flags; 1162 1163 if (fnic->in_remove) { 1164 dev_kfree_skb(fp_skb(fp)); 1165 return -1; 1166 } 1167 1168 /* 1169 * Queue frame if in a transitional state. 1170 * This occurs while registering the Port_ID / MAC address after FLOGI. 1171 */ 1172 spin_lock_irqsave(&fnic->fnic_lock, flags); 1173 if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) { 1174 skb_queue_tail(&fnic->tx_queue, fp_skb(fp)); 1175 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 1176 return 0; 1177 } 1178 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 1179 1180 return fnic_send_frame(fnic, fp); 1181 } 1182 1183 /** 1184 * fnic_flush_tx() - send queued frames. 1185 * @fnic: fnic device 1186 * 1187 * Send frames that were waiting to go out in FC or Ethernet mode. 1188 * Whenever changing modes we purge queued frames, so these frames should 1189 * be queued for the stable mode that we're in, either FC or Ethernet. 1190 * 1191 * Called without fnic_lock held. 1192 */ 1193 void fnic_flush_tx(struct fnic *fnic) 1194 { 1195 struct sk_buff *skb; 1196 struct fc_frame *fp; 1197 1198 while ((skb = skb_dequeue(&fnic->tx_queue))) { 1199 fp = (struct fc_frame *)skb; 1200 fnic_send_frame(fnic, fp); 1201 } 1202 } 1203 1204 /** 1205 * fnic_set_eth_mode() - put fnic into ethernet mode. 1206 * @fnic: fnic device 1207 * 1208 * Called without fnic lock held. 1209 */ 1210 static void fnic_set_eth_mode(struct fnic *fnic) 1211 { 1212 unsigned long flags; 1213 enum fnic_state old_state; 1214 int ret; 1215 1216 spin_lock_irqsave(&fnic->fnic_lock, flags); 1217 again: 1218 old_state = fnic->state; 1219 switch (old_state) { 1220 case FNIC_IN_FC_MODE: 1221 case FNIC_IN_ETH_TRANS_FC_MODE: 1222 default: 1223 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 1224 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 1225 1226 ret = fnic_fw_reset_handler(fnic); 1227 1228 spin_lock_irqsave(&fnic->fnic_lock, flags); 1229 if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE) 1230 goto again; 1231 if (ret) 1232 fnic->state = old_state; 1233 break; 1234 1235 case FNIC_IN_FC_TRANS_ETH_MODE: 1236 case FNIC_IN_ETH_MODE: 1237 break; 1238 } 1239 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 1240 } 1241 1242 static void fnic_wq_complete_frame_send(struct vnic_wq *wq, 1243 struct cq_desc *cq_desc, 1244 struct vnic_wq_buf *buf, void *opaque) 1245 { 1246 struct sk_buff *skb = buf->os_buf; 1247 struct fc_frame *fp = (struct fc_frame *)skb; 1248 struct fnic *fnic = vnic_dev_priv(wq->vdev); 1249 1250 pci_unmap_single(fnic->pdev, buf->dma_addr, 1251 buf->len, PCI_DMA_TODEVICE); 1252 dev_kfree_skb_irq(fp_skb(fp)); 1253 buf->os_buf = NULL; 1254 } 1255 1256 static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev, 1257 struct cq_desc *cq_desc, u8 type, 1258 u16 q_number, u16 completed_index, 1259 void *opaque) 1260 { 1261 struct fnic *fnic = vnic_dev_priv(vdev); 1262 unsigned long flags; 1263 1264 spin_lock_irqsave(&fnic->wq_lock[q_number], flags); 1265 vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index, 1266 fnic_wq_complete_frame_send, NULL); 1267 spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags); 1268 1269 return 0; 1270 } 1271 1272 int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do) 1273 { 1274 unsigned int wq_work_done = 0; 1275 unsigned int i; 1276 1277 for (i = 0; i < fnic->raw_wq_count; i++) { 1278 wq_work_done += vnic_cq_service(&fnic->cq[fnic->rq_count+i], 1279 work_to_do, 1280 fnic_wq_cmpl_handler_cont, 1281 NULL); 1282 } 1283 1284 return wq_work_done; 1285 } 1286 1287 1288 void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) 1289 { 1290 struct fc_frame *fp = buf->os_buf; 1291 struct fnic *fnic = vnic_dev_priv(wq->vdev); 1292 1293 pci_unmap_single(fnic->pdev, buf->dma_addr, 1294 buf->len, PCI_DMA_TODEVICE); 1295 1296 dev_kfree_skb(fp_skb(fp)); 1297 buf->os_buf = NULL; 1298 } 1299 1300 void fnic_fcoe_reset_vlans(struct fnic *fnic) 1301 { 1302 unsigned long flags; 1303 struct fcoe_vlan *vlan; 1304 struct fcoe_vlan *next; 1305 1306 /* 1307 * indicate a link down to fcoe so that all fcf's are free'd 1308 * might not be required since we did this before sending vlan 1309 * discovery request 1310 */ 1311 spin_lock_irqsave(&fnic->vlans_lock, flags); 1312 if (!list_empty(&fnic->vlans)) { 1313 list_for_each_entry_safe(vlan, next, &fnic->vlans, list) { 1314 list_del(&vlan->list); 1315 kfree(vlan); 1316 } 1317 } 1318 spin_unlock_irqrestore(&fnic->vlans_lock, flags); 1319 } 1320 1321 void fnic_handle_fip_timer(struct fnic *fnic) 1322 { 1323 unsigned long flags; 1324 struct fcoe_vlan *vlan; 1325 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1326 u64 sol_time; 1327 1328 spin_lock_irqsave(&fnic->fnic_lock, flags); 1329 if (fnic->stop_rx_link_events) { 1330 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 1331 return; 1332 } 1333 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 1334 1335 if (fnic->ctlr.mode == FIP_MODE_NON_FIP) 1336 return; 1337 1338 spin_lock_irqsave(&fnic->vlans_lock, flags); 1339 if (list_empty(&fnic->vlans)) { 1340 spin_unlock_irqrestore(&fnic->vlans_lock, flags); 1341 /* no vlans available, try again */ 1342 if (printk_ratelimit()) 1343 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, 1344 "Start VLAN Discovery\n"); 1345 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); 1346 return; 1347 } 1348 1349 vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); 1350 shost_printk(KERN_DEBUG, fnic->lport->host, 1351 "fip_timer: vlan %d state %d sol_count %d\n", 1352 vlan->vid, vlan->state, vlan->sol_count); 1353 switch (vlan->state) { 1354 case FIP_VLAN_USED: 1355 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, 1356 "FIP VLAN is selected for FC transaction\n"); 1357 spin_unlock_irqrestore(&fnic->vlans_lock, flags); 1358 break; 1359 case FIP_VLAN_FAILED: 1360 spin_unlock_irqrestore(&fnic->vlans_lock, flags); 1361 /* if all vlans are in failed state, restart vlan disc */ 1362 if (printk_ratelimit()) 1363 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, 1364 "Start VLAN Discovery\n"); 1365 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); 1366 break; 1367 case FIP_VLAN_SENT: 1368 if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) { 1369 /* 1370 * no response on this vlan, remove from the list. 1371 * Try the next vlan 1372 */ 1373 shost_printk(KERN_INFO, fnic->lport->host, 1374 "Dequeue this VLAN ID %d from list\n", 1375 vlan->vid); 1376 list_del(&vlan->list); 1377 kfree(vlan); 1378 vlan = NULL; 1379 if (list_empty(&fnic->vlans)) { 1380 /* we exhausted all vlans, restart vlan disc */ 1381 spin_unlock_irqrestore(&fnic->vlans_lock, 1382 flags); 1383 shost_printk(KERN_INFO, fnic->lport->host, 1384 "fip_timer: vlan list empty, " 1385 "trigger vlan disc\n"); 1386 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); 1387 return; 1388 } 1389 /* check the next vlan */ 1390 vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, 1391 list); 1392 fnic->set_vlan(fnic, vlan->vid); 1393 vlan->state = FIP_VLAN_SENT; /* sent now */ 1394 } 1395 spin_unlock_irqrestore(&fnic->vlans_lock, flags); 1396 atomic64_inc(&fnic_stats->vlan_stats.sol_expiry_count); 1397 vlan->sol_count++; 1398 sol_time = jiffies + msecs_to_jiffies 1399 (FCOE_CTLR_START_DELAY); 1400 mod_timer(&fnic->fip_timer, round_jiffies(sol_time)); 1401 break; 1402 } 1403 } 1404