1 /* 2 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms and conditions of the GNU General Public License, 6 * version 2, as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11 * more details. 12 * 13 * You should have received a copy of the GNU General Public License along with 14 * this program; if not, write to the Free Software Foundation, Inc., 15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 16 * 17 * Maintained at www.Open-FCoE.org 18 */ 19 20 #include <linux/module.h> 21 #include <linux/spinlock.h> 22 #include <linux/netdevice.h> 23 #include <linux/etherdevice.h> 24 #include <linux/ethtool.h> 25 #include <linux/if_ether.h> 26 #include <linux/if_vlan.h> 27 #include <linux/crc32.h> 28 #include <linux/slab.h> 29 #include <linux/cpu.h> 30 #include <linux/fs.h> 31 #include <linux/sysfs.h> 32 #include <linux/ctype.h> 33 #include <linux/workqueue.h> 34 #include <net/dcbnl.h> 35 #include <net/dcbevent.h> 36 #include <scsi/scsi_tcq.h> 37 #include <scsi/scsicam.h> 38 #include <scsi/scsi_transport.h> 39 #include <scsi/scsi_transport_fc.h> 40 #include <net/rtnetlink.h> 41 42 #include <scsi/fc/fc_encaps.h> 43 #include <scsi/fc/fc_fip.h> 44 #include <scsi/fc/fc_fcoe.h> 45 46 #include <scsi/libfc.h> 47 #include <scsi/fc_frame.h> 48 #include <scsi/libfcoe.h> 49 50 #include "fcoe.h" 51 52 MODULE_AUTHOR("Open-FCoE.org"); 53 MODULE_DESCRIPTION("FCoE"); 54 MODULE_LICENSE("GPL v2"); 55 56 /* Performance tuning parameters for fcoe */ 57 static unsigned int fcoe_ddp_min = 4096; 58 module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); 59 MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ 60 "Direct Data Placement (DDP)."); 61 62 unsigned int fcoe_debug_logging; 63 module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR); 64 MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); 65 66 static DEFINE_MUTEX(fcoe_config_mutex); 67 68 static struct workqueue_struct *fcoe_wq; 69 70 /* fcoe host list */ 71 /* must only by accessed under the RTNL mutex */ 72 static LIST_HEAD(fcoe_hostlist); 73 static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); 74 75 /* Function Prototypes */ 76 static int fcoe_reset(struct Scsi_Host *); 77 static int fcoe_xmit(struct fc_lport *, struct fc_frame *); 78 static int fcoe_rcv(struct sk_buff *, struct net_device *, 79 struct packet_type *, struct net_device *); 80 static void fcoe_percpu_clean(struct fc_lport *); 81 static int fcoe_link_ok(struct fc_lport *); 82 83 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); 84 static int fcoe_hostlist_add(const struct fc_lport *); 85 static void fcoe_hostlist_del(const struct fc_lport *); 86 87 static int fcoe_device_notification(struct notifier_block *, ulong, void *); 88 static void fcoe_dev_setup(void); 89 static void fcoe_dev_cleanup(void); 90 static struct fcoe_interface 91 *fcoe_hostlist_lookup_port(const struct net_device *); 92 93 static int fcoe_fip_recv(struct sk_buff *, struct net_device *, 94 struct packet_type *, struct net_device *); 95 96 static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); 97 static void fcoe_update_src_mac(struct fc_lport *, u8 *); 98 static u8 *fcoe_get_src_mac(struct fc_lport *); 99 static void fcoe_destroy_work(struct work_struct *); 100 101 static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, 102 unsigned int); 103 static int fcoe_ddp_done(struct fc_lport *, u16); 104 static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *, 105 unsigned int); 106 static int fcoe_dcb_app_notification(struct notifier_block *notifier, 107 ulong event, void *ptr); 108 109 static bool fcoe_match(struct net_device *netdev); 110 static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode); 111 static int fcoe_destroy(struct net_device *netdev); 112 static int fcoe_enable(struct net_device *netdev); 113 static int fcoe_disable(struct net_device *netdev); 114 115 /* fcoe_syfs control interface handlers */ 116 static int fcoe_ctlr_alloc(struct net_device *netdev); 117 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev); 118 static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev); 119 120 static struct fc_seq *fcoe_elsct_send(struct fc_lport *, 121 u32 did, struct fc_frame *, 122 unsigned int op, 123 void (*resp)(struct fc_seq *, 124 struct fc_frame *, 125 void *), 126 void *, u32 timeout); 127 static void fcoe_recv_frame(struct sk_buff *skb); 128 129 /* notification function for packets from net device */ 130 static struct notifier_block fcoe_notifier = { 131 .notifier_call = fcoe_device_notification, 132 }; 133 134 /* notification function for DCB events */ 135 static struct notifier_block dcb_notifier = { 136 .notifier_call = fcoe_dcb_app_notification, 137 }; 138 139 static struct scsi_transport_template *fcoe_nport_scsi_transport; 140 static struct scsi_transport_template *fcoe_vport_scsi_transport; 141 142 static int fcoe_vport_destroy(struct fc_vport *); 143 static int fcoe_vport_create(struct fc_vport *, bool disabled); 144 static int fcoe_vport_disable(struct fc_vport *, bool disable); 145 static void fcoe_set_vport_symbolic_name(struct fc_vport *); 146 static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *); 147 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *); 148 149 150 static struct fcoe_sysfs_function_template fcoe_sysfs_templ = { 151 .set_fcoe_ctlr_mode = fcoe_ctlr_mode, 152 .set_fcoe_ctlr_enabled = fcoe_ctlr_enabled, 153 .get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb, 154 .get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb, 155 .get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb, 156 .get_fcoe_ctlr_symb_err = fcoe_ctlr_get_lesb, 157 .get_fcoe_ctlr_err_block = fcoe_ctlr_get_lesb, 158 .get_fcoe_ctlr_fcs_error = fcoe_ctlr_get_lesb, 159 160 .get_fcoe_fcf_selected = fcoe_fcf_get_selected, 161 .get_fcoe_fcf_vlan_id = fcoe_fcf_get_vlan_id, 162 }; 163 164 static struct libfc_function_template fcoe_libfc_fcn_templ = { 165 .frame_send = fcoe_xmit, 166 .ddp_setup = fcoe_ddp_setup, 167 .ddp_done = fcoe_ddp_done, 168 .ddp_target = fcoe_ddp_target, 169 .elsct_send = fcoe_elsct_send, 170 .get_lesb = fcoe_get_lesb, 171 .lport_set_port_id = fcoe_set_port_id, 172 }; 173 174 static struct fc_function_template fcoe_nport_fc_functions = { 175 .show_host_node_name = 1, 176 .show_host_port_name = 1, 177 .show_host_supported_classes = 1, 178 .show_host_supported_fc4s = 1, 179 .show_host_active_fc4s = 1, 180 .show_host_maxframe_size = 1, 181 .show_host_serial_number = 1, 182 .show_host_manufacturer = 1, 183 .show_host_model = 1, 184 .show_host_model_description = 1, 185 .show_host_hardware_version = 1, 186 .show_host_driver_version = 1, 187 .show_host_firmware_version = 1, 188 .show_host_optionrom_version = 1, 189 190 .show_host_port_id = 1, 191 .show_host_supported_speeds = 1, 192 .get_host_speed = fc_get_host_speed, 193 .show_host_speed = 1, 194 .show_host_port_type = 1, 195 .get_host_port_state = fc_get_host_port_state, 196 .show_host_port_state = 1, 197 .show_host_symbolic_name = 1, 198 199 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 200 .show_rport_maxframe_size = 1, 201 .show_rport_supported_classes = 1, 202 203 .show_host_fabric_name = 1, 204 .show_starget_node_name = 1, 205 .show_starget_port_name = 1, 206 .show_starget_port_id = 1, 207 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, 208 .show_rport_dev_loss_tmo = 1, 209 .get_fc_host_stats = fc_get_host_stats, 210 .issue_fc_host_lip = fcoe_reset, 211 212 .terminate_rport_io = fc_rport_terminate_io, 213 214 .vport_create = fcoe_vport_create, 215 .vport_delete = fcoe_vport_destroy, 216 .vport_disable = fcoe_vport_disable, 217 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, 218 219 .bsg_request = fc_lport_bsg_request, 220 }; 221 222 static struct fc_function_template fcoe_vport_fc_functions = { 223 .show_host_node_name = 1, 224 .show_host_port_name = 1, 225 .show_host_supported_classes = 1, 226 .show_host_supported_fc4s = 1, 227 .show_host_active_fc4s = 1, 228 .show_host_maxframe_size = 1, 229 .show_host_serial_number = 1, 230 .show_host_manufacturer = 1, 231 .show_host_model = 1, 232 .show_host_model_description = 1, 233 .show_host_hardware_version = 1, 234 .show_host_driver_version = 1, 235 .show_host_firmware_version = 1, 236 .show_host_optionrom_version = 1, 237 238 .show_host_port_id = 1, 239 .show_host_supported_speeds = 1, 240 .get_host_speed = fc_get_host_speed, 241 .show_host_speed = 1, 242 .show_host_port_type = 1, 243 .get_host_port_state = fc_get_host_port_state, 244 .show_host_port_state = 1, 245 .show_host_symbolic_name = 1, 246 247 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 248 .show_rport_maxframe_size = 1, 249 .show_rport_supported_classes = 1, 250 251 .show_host_fabric_name = 1, 252 .show_starget_node_name = 1, 253 .show_starget_port_name = 1, 254 .show_starget_port_id = 1, 255 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, 256 .show_rport_dev_loss_tmo = 1, 257 .get_fc_host_stats = fc_get_host_stats, 258 .issue_fc_host_lip = fcoe_reset, 259 260 .terminate_rport_io = fc_rport_terminate_io, 261 262 .bsg_request = fc_lport_bsg_request, 263 }; 264 265 static struct scsi_host_template fcoe_shost_template = { 266 .module = THIS_MODULE, 267 .name = "FCoE Driver", 268 .proc_name = FCOE_NAME, 269 .queuecommand = fc_queuecommand, 270 .eh_abort_handler = fc_eh_abort, 271 .eh_device_reset_handler = fc_eh_device_reset, 272 .eh_host_reset_handler = fc_eh_host_reset, 273 .slave_alloc = fc_slave_alloc, 274 .change_queue_depth = scsi_change_queue_depth, 275 .this_id = -1, 276 .cmd_per_lun = 3, 277 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, 278 .use_clustering = ENABLE_CLUSTERING, 279 .sg_tablesize = SG_ALL, 280 .max_sectors = 0xffff, 281 .track_queue_depth = 1, 282 }; 283 284 /** 285 * fcoe_interface_setup() - Setup a FCoE interface 286 * @fcoe: The new FCoE interface 287 * @netdev: The net device that the fcoe interface is on 288 * 289 * Returns : 0 for success 290 * Locking: must be called with the RTNL mutex held 291 */ 292 static int fcoe_interface_setup(struct fcoe_interface *fcoe, 293 struct net_device *netdev) 294 { 295 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 296 struct netdev_hw_addr *ha; 297 struct net_device *real_dev; 298 u8 flogi_maddr[ETH_ALEN]; 299 const struct net_device_ops *ops; 300 301 fcoe->netdev = netdev; 302 303 /* Let LLD initialize for FCoE */ 304 ops = netdev->netdev_ops; 305 if (ops->ndo_fcoe_enable) { 306 if (ops->ndo_fcoe_enable(netdev)) 307 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" 308 " specific feature for LLD.\n"); 309 } 310 311 /* Do not support for bonding device */ 312 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) { 313 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); 314 return -EOPNOTSUPP; 315 } 316 317 /* look for SAN MAC address, if multiple SAN MACs exist, only 318 * use the first one for SPMA */ 319 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ? 320 vlan_dev_real_dev(netdev) : netdev; 321 fcoe->realdev = real_dev; 322 rcu_read_lock(); 323 for_each_dev_addr(real_dev, ha) { 324 if ((ha->type == NETDEV_HW_ADDR_T_SAN) && 325 (is_valid_ether_addr(ha->addr))) { 326 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); 327 fip->spma = 1; 328 break; 329 } 330 } 331 rcu_read_unlock(); 332 333 /* setup Source Mac Address */ 334 if (!fip->spma) 335 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); 336 337 /* 338 * Add FCoE MAC address as second unicast MAC address 339 * or enter promiscuous mode if not capable of listening 340 * for multiple unicast MACs. 341 */ 342 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); 343 dev_uc_add(netdev, flogi_maddr); 344 if (fip->spma) 345 dev_uc_add(netdev, fip->ctl_src_addr); 346 if (fip->mode == FIP_MODE_VN2VN) { 347 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS); 348 dev_mc_add(netdev, FIP_ALL_P2P_MACS); 349 } else 350 dev_mc_add(netdev, FIP_ALL_ENODE_MACS); 351 352 /* 353 * setup the receive function from ethernet driver 354 * on the ethertype for the given device 355 */ 356 fcoe->fcoe_packet_type.func = fcoe_rcv; 357 fcoe->fcoe_packet_type.type = htons(ETH_P_FCOE); 358 fcoe->fcoe_packet_type.dev = netdev; 359 dev_add_pack(&fcoe->fcoe_packet_type); 360 361 fcoe->fip_packet_type.func = fcoe_fip_recv; 362 fcoe->fip_packet_type.type = htons(ETH_P_FIP); 363 fcoe->fip_packet_type.dev = netdev; 364 dev_add_pack(&fcoe->fip_packet_type); 365 366 return 0; 367 } 368 369 /** 370 * fcoe_interface_create() - Create a FCoE interface on a net device 371 * @netdev: The net device to create the FCoE interface on 372 * @fip_mode: The mode to use for FIP 373 * 374 * Returns: pointer to a struct fcoe_interface or NULL on error 375 */ 376 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev, 377 enum fip_state fip_mode) 378 { 379 struct fcoe_ctlr_device *ctlr_dev; 380 struct fcoe_ctlr *ctlr; 381 struct fcoe_interface *fcoe; 382 int size; 383 int err; 384 385 if (!try_module_get(THIS_MODULE)) { 386 FCOE_NETDEV_DBG(netdev, 387 "Could not get a reference to the module\n"); 388 fcoe = ERR_PTR(-EBUSY); 389 goto out; 390 } 391 392 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface); 393 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ, 394 size); 395 if (!ctlr_dev) { 396 FCOE_DBG("Failed to add fcoe_ctlr_device\n"); 397 fcoe = ERR_PTR(-ENOMEM); 398 goto out_putmod; 399 } 400 401 ctlr = fcoe_ctlr_device_priv(ctlr_dev); 402 ctlr->cdev = ctlr_dev; 403 fcoe = fcoe_ctlr_priv(ctlr); 404 405 dev_hold(netdev); 406 407 /* 408 * Initialize FIP. 409 */ 410 fcoe_ctlr_init(ctlr, fip_mode); 411 ctlr->send = fcoe_fip_send; 412 ctlr->update_mac = fcoe_update_src_mac; 413 ctlr->get_src_addr = fcoe_get_src_mac; 414 415 err = fcoe_interface_setup(fcoe, netdev); 416 if (err) { 417 fcoe_ctlr_destroy(ctlr); 418 fcoe_ctlr_device_delete(ctlr_dev); 419 dev_put(netdev); 420 fcoe = ERR_PTR(err); 421 goto out_putmod; 422 } 423 424 goto out; 425 426 out_putmod: 427 module_put(THIS_MODULE); 428 out: 429 return fcoe; 430 } 431 432 /** 433 * fcoe_interface_remove() - remove FCoE interface from netdev 434 * @fcoe: The FCoE interface to be cleaned up 435 * 436 * Caller must be holding the RTNL mutex 437 */ 438 static void fcoe_interface_remove(struct fcoe_interface *fcoe) 439 { 440 struct net_device *netdev = fcoe->netdev; 441 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 442 u8 flogi_maddr[ETH_ALEN]; 443 const struct net_device_ops *ops; 444 445 /* 446 * Don't listen for Ethernet packets anymore. 447 * synchronize_net() ensures that the packet handlers are not running 448 * on another CPU. dev_remove_pack() would do that, this calls the 449 * unsyncronized version __dev_remove_pack() to avoid multiple delays. 450 */ 451 __dev_remove_pack(&fcoe->fcoe_packet_type); 452 __dev_remove_pack(&fcoe->fip_packet_type); 453 synchronize_net(); 454 455 /* Delete secondary MAC addresses */ 456 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); 457 dev_uc_del(netdev, flogi_maddr); 458 if (fip->spma) 459 dev_uc_del(netdev, fip->ctl_src_addr); 460 if (fip->mode == FIP_MODE_VN2VN) { 461 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS); 462 dev_mc_del(netdev, FIP_ALL_P2P_MACS); 463 } else 464 dev_mc_del(netdev, FIP_ALL_ENODE_MACS); 465 466 /* Tell the LLD we are done w/ FCoE */ 467 ops = netdev->netdev_ops; 468 if (ops->ndo_fcoe_disable) { 469 if (ops->ndo_fcoe_disable(netdev)) 470 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" 471 " specific feature for LLD.\n"); 472 } 473 fcoe->removed = 1; 474 } 475 476 477 /** 478 * fcoe_interface_cleanup() - Clean up a FCoE interface 479 * @fcoe: The FCoE interface to be cleaned up 480 */ 481 static void fcoe_interface_cleanup(struct fcoe_interface *fcoe) 482 { 483 struct net_device *netdev = fcoe->netdev; 484 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 485 486 rtnl_lock(); 487 if (!fcoe->removed) 488 fcoe_interface_remove(fcoe); 489 rtnl_unlock(); 490 491 /* Release the self-reference taken during fcoe_interface_create() */ 492 /* tear-down the FCoE controller */ 493 fcoe_ctlr_destroy(fip); 494 scsi_host_put(fip->lp->host); 495 dev_put(netdev); 496 module_put(THIS_MODULE); 497 } 498 499 /** 500 * fcoe_fip_recv() - Handler for received FIP frames 501 * @skb: The receive skb 502 * @netdev: The associated net device 503 * @ptype: The packet_type structure which was used to register this handler 504 * @orig_dev: The original net_device the the skb was received on. 505 * (in case dev is a bond) 506 * 507 * Returns: 0 for success 508 */ 509 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, 510 struct packet_type *ptype, 511 struct net_device *orig_dev) 512 { 513 struct fcoe_interface *fcoe; 514 struct fcoe_ctlr *ctlr; 515 516 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); 517 ctlr = fcoe_to_ctlr(fcoe); 518 fcoe_ctlr_recv(ctlr, skb); 519 return 0; 520 } 521 522 /** 523 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame 524 * @port: The FCoE port 525 * @skb: The FIP/FCoE packet to be sent 526 */ 527 static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb) 528 { 529 if (port->fcoe_pending_queue.qlen) 530 fcoe_check_wait_queue(port->lport, skb); 531 else if (fcoe_start_io(skb)) 532 fcoe_check_wait_queue(port->lport, skb); 533 } 534 535 /** 536 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame 537 * @fip: The FCoE controller 538 * @skb: The FIP packet to be sent 539 */ 540 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) 541 { 542 skb->dev = fcoe_from_ctlr(fip)->netdev; 543 fcoe_port_send(lport_priv(fip->lp), skb); 544 } 545 546 /** 547 * fcoe_update_src_mac() - Update the Ethernet MAC filters 548 * @lport: The local port to update the source MAC on 549 * @addr: Unicast MAC address to add 550 * 551 * Remove any previously-set unicast MAC filter. 552 * Add secondary FCoE MAC address filter for our OUI. 553 */ 554 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) 555 { 556 struct fcoe_port *port = lport_priv(lport); 557 struct fcoe_interface *fcoe = port->priv; 558 559 if (!is_zero_ether_addr(port->data_src_addr)) 560 dev_uc_del(fcoe->netdev, port->data_src_addr); 561 if (!is_zero_ether_addr(addr)) 562 dev_uc_add(fcoe->netdev, addr); 563 memcpy(port->data_src_addr, addr, ETH_ALEN); 564 } 565 566 /** 567 * fcoe_get_src_mac() - return the Ethernet source address for an lport 568 * @lport: libfc lport 569 */ 570 static u8 *fcoe_get_src_mac(struct fc_lport *lport) 571 { 572 struct fcoe_port *port = lport_priv(lport); 573 574 return port->data_src_addr; 575 } 576 577 /** 578 * fcoe_lport_config() - Set up a local port 579 * @lport: The local port to be setup 580 * 581 * Returns: 0 for success 582 */ 583 static int fcoe_lport_config(struct fc_lport *lport) 584 { 585 lport->link_up = 0; 586 lport->qfull = 0; 587 lport->max_retry_count = 3; 588 lport->max_rport_retry_count = 3; 589 lport->e_d_tov = 2 * 1000; /* FC-FS default */ 590 lport->r_a_tov = 2 * 2 * 1000; 591 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | 592 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); 593 lport->does_npiv = 1; 594 595 fc_lport_init_stats(lport); 596 597 /* lport fc_lport related configuration */ 598 fc_lport_config(lport); 599 600 /* offload related configuration */ 601 lport->crc_offload = 0; 602 lport->seq_offload = 0; 603 lport->lro_enabled = 0; 604 lport->lro_xid = 0; 605 lport->lso_max = 0; 606 607 return 0; 608 } 609 610 /** 611 * fcoe_netdev_features_change - Updates the lport's offload flags based 612 * on the LLD netdev's FCoE feature flags 613 */ 614 static void fcoe_netdev_features_change(struct fc_lport *lport, 615 struct net_device *netdev) 616 { 617 mutex_lock(&lport->lp_mutex); 618 619 if (netdev->features & NETIF_F_SG) 620 lport->sg_supp = 1; 621 else 622 lport->sg_supp = 0; 623 624 if (netdev->features & NETIF_F_FCOE_CRC) { 625 lport->crc_offload = 1; 626 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); 627 } else { 628 lport->crc_offload = 0; 629 } 630 631 if (netdev->features & NETIF_F_FSO) { 632 lport->seq_offload = 1; 633 lport->lso_max = netdev->gso_max_size; 634 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", 635 lport->lso_max); 636 } else { 637 lport->seq_offload = 0; 638 lport->lso_max = 0; 639 } 640 641 if (netdev->fcoe_ddp_xid) { 642 lport->lro_enabled = 1; 643 lport->lro_xid = netdev->fcoe_ddp_xid; 644 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", 645 lport->lro_xid); 646 } else { 647 lport->lro_enabled = 0; 648 lport->lro_xid = 0; 649 } 650 651 mutex_unlock(&lport->lp_mutex); 652 } 653 654 /** 655 * fcoe_netdev_config() - Set up net devive for SW FCoE 656 * @lport: The local port that is associated with the net device 657 * @netdev: The associated net device 658 * 659 * Must be called after fcoe_lport_config() as it will use local port mutex 660 * 661 * Returns: 0 for success 662 */ 663 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) 664 { 665 u32 mfs; 666 u64 wwnn, wwpn; 667 struct fcoe_interface *fcoe; 668 struct fcoe_ctlr *ctlr; 669 struct fcoe_port *port; 670 671 /* Setup lport private data to point to fcoe softc */ 672 port = lport_priv(lport); 673 fcoe = port->priv; 674 ctlr = fcoe_to_ctlr(fcoe); 675 676 /* Figure out the VLAN ID, if any */ 677 if (netdev->priv_flags & IFF_802_1Q_VLAN) 678 lport->vlan = vlan_dev_vlan_id(netdev); 679 else 680 lport->vlan = 0; 681 682 /* 683 * Determine max frame size based on underlying device and optional 684 * user-configured limit. If the MFS is too low, fcoe_link_ok() 685 * will return 0, so do this first. 686 */ 687 mfs = netdev->mtu; 688 if (netdev->features & NETIF_F_FCOE_MTU) { 689 mfs = FCOE_MTU; 690 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); 691 } 692 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); 693 if (fc_set_mfs(lport, mfs)) 694 return -EINVAL; 695 696 /* offload features support */ 697 fcoe_netdev_features_change(lport, netdev); 698 699 skb_queue_head_init(&port->fcoe_pending_queue); 700 port->fcoe_pending_queue_active = 0; 701 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport); 702 703 fcoe_link_speed_update(lport); 704 705 if (!lport->vport) { 706 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN)) 707 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0); 708 fc_set_wwnn(lport, wwnn); 709 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN)) 710 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 711 2, 0); 712 fc_set_wwpn(lport, wwpn); 713 } 714 715 return 0; 716 } 717 718 /** 719 * fcoe_shost_config() - Set up the SCSI host associated with a local port 720 * @lport: The local port 721 * @dev: The device associated with the SCSI host 722 * 723 * Must be called after fcoe_lport_config() and fcoe_netdev_config() 724 * 725 * Returns: 0 for success 726 */ 727 static int fcoe_shost_config(struct fc_lport *lport, struct device *dev) 728 { 729 int rc = 0; 730 731 /* lport scsi host config */ 732 lport->host->max_lun = FCOE_MAX_LUN; 733 lport->host->max_id = FCOE_MAX_FCP_TARGET; 734 lport->host->max_channel = 0; 735 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN; 736 737 if (lport->vport) 738 lport->host->transportt = fcoe_vport_scsi_transport; 739 else 740 lport->host->transportt = fcoe_nport_scsi_transport; 741 742 /* add the new host to the SCSI-ml */ 743 rc = scsi_add_host(lport->host, dev); 744 if (rc) { 745 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " 746 "error on scsi_add_host\n"); 747 return rc; 748 } 749 750 if (!lport->vport) 751 fc_host_max_npiv_vports(lport->host) = USHRT_MAX; 752 753 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, 754 "%s v%s over %s", FCOE_NAME, FCOE_VERSION, 755 fcoe_netdev(lport)->name); 756 757 return 0; 758 } 759 760 761 /** 762 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE 763 * @lport: The local port that is associated with the net device 764 * @netdev: The associated net device 765 * 766 * Must be called after fcoe_shost_config() as it will use local port mutex 767 * 768 */ 769 static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev) 770 { 771 struct fcoe_interface *fcoe; 772 struct fcoe_port *port; 773 struct net_device *realdev; 774 int rc; 775 776 port = lport_priv(lport); 777 fcoe = port->priv; 778 realdev = fcoe->realdev; 779 780 /* No FDMI state m/c for NPIV ports */ 781 if (lport->vport) 782 return; 783 784 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) { 785 struct netdev_fcoe_hbainfo *fdmi; 786 fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL); 787 if (!fdmi) 788 return; 789 790 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev, 791 fdmi); 792 if (rc) { 793 printk(KERN_INFO "fcoe: Failed to retrieve FDMI " 794 "information from netdev.\n"); 795 return; 796 } 797 798 snprintf(fc_host_serial_number(lport->host), 799 FC_SERIAL_NUMBER_SIZE, 800 "%s", 801 fdmi->serial_number); 802 snprintf(fc_host_manufacturer(lport->host), 803 FC_SERIAL_NUMBER_SIZE, 804 "%s", 805 fdmi->manufacturer); 806 snprintf(fc_host_model(lport->host), 807 FC_SYMBOLIC_NAME_SIZE, 808 "%s", 809 fdmi->model); 810 snprintf(fc_host_model_description(lport->host), 811 FC_SYMBOLIC_NAME_SIZE, 812 "%s", 813 fdmi->model_description); 814 snprintf(fc_host_hardware_version(lport->host), 815 FC_VERSION_STRING_SIZE, 816 "%s", 817 fdmi->hardware_version); 818 snprintf(fc_host_driver_version(lport->host), 819 FC_VERSION_STRING_SIZE, 820 "%s", 821 fdmi->driver_version); 822 snprintf(fc_host_optionrom_version(lport->host), 823 FC_VERSION_STRING_SIZE, 824 "%s", 825 fdmi->optionrom_version); 826 snprintf(fc_host_firmware_version(lport->host), 827 FC_VERSION_STRING_SIZE, 828 "%s", 829 fdmi->firmware_version); 830 831 /* Enable FDMI lport states */ 832 lport->fdmi_enabled = 1; 833 kfree(fdmi); 834 } else { 835 lport->fdmi_enabled = 0; 836 printk(KERN_INFO "fcoe: No FDMI support.\n"); 837 } 838 } 839 840 /** 841 * fcoe_oem_match() - The match routine for the offloaded exchange manager 842 * @fp: The I/O frame 843 * 844 * This routine will be associated with an exchange manager (EM). When 845 * the libfc exchange handling code is looking for an EM to use it will 846 * call this routine and pass it the frame that it wishes to send. This 847 * routine will return True if the associated EM is to be used and False 848 * if the echange code should continue looking for an EM. 849 * 850 * The offload EM that this routine is associated with will handle any 851 * packets that are for SCSI read requests. 852 * 853 * This has been enhanced to work when FCoE stack is operating in target 854 * mode. 855 * 856 * Returns: True for read types I/O, otherwise returns false. 857 */ 858 static bool fcoe_oem_match(struct fc_frame *fp) 859 { 860 struct fc_frame_header *fh = fc_frame_header_get(fp); 861 struct fcp_cmnd *fcp; 862 863 if (fc_fcp_is_read(fr_fsp(fp)) && 864 (fr_fsp(fp)->data_len > fcoe_ddp_min)) 865 return true; 866 else if ((fr_fsp(fp) == NULL) && 867 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) && 868 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) { 869 fcp = fc_frame_payload_get(fp, sizeof(*fcp)); 870 if ((fcp->fc_flags & FCP_CFL_WRDATA) && 871 (ntohl(fcp->fc_dl) > fcoe_ddp_min)) 872 return true; 873 } 874 return false; 875 } 876 877 /** 878 * fcoe_em_config() - Allocate and configure an exchange manager 879 * @lport: The local port that the new EM will be associated with 880 * 881 * Returns: 0 on success 882 */ 883 static inline int fcoe_em_config(struct fc_lport *lport) 884 { 885 struct fcoe_port *port = lport_priv(lport); 886 struct fcoe_interface *fcoe = port->priv; 887 struct fcoe_interface *oldfcoe = NULL; 888 struct net_device *old_real_dev, *cur_real_dev; 889 u16 min_xid = FCOE_MIN_XID; 890 u16 max_xid = FCOE_MAX_XID; 891 892 /* 893 * Check if need to allocate an em instance for 894 * offload exchange ids to be shared across all VN_PORTs/lport. 895 */ 896 if (!lport->lro_enabled || !lport->lro_xid || 897 (lport->lro_xid >= max_xid)) { 898 lport->lro_xid = 0; 899 goto skip_oem; 900 } 901 902 /* 903 * Reuse existing offload em instance in case 904 * it is already allocated on real eth device 905 */ 906 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) 907 cur_real_dev = vlan_dev_real_dev(fcoe->netdev); 908 else 909 cur_real_dev = fcoe->netdev; 910 911 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { 912 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) 913 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); 914 else 915 old_real_dev = oldfcoe->netdev; 916 917 if (cur_real_dev == old_real_dev) { 918 fcoe->oem = oldfcoe->oem; 919 break; 920 } 921 } 922 923 if (fcoe->oem) { 924 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { 925 printk(KERN_ERR "fcoe_em_config: failed to add " 926 "offload em:%p on interface:%s\n", 927 fcoe->oem, fcoe->netdev->name); 928 return -ENOMEM; 929 } 930 } else { 931 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, 932 FCOE_MIN_XID, lport->lro_xid, 933 fcoe_oem_match); 934 if (!fcoe->oem) { 935 printk(KERN_ERR "fcoe_em_config: failed to allocate " 936 "em for offload exches on interface:%s\n", 937 fcoe->netdev->name); 938 return -ENOMEM; 939 } 940 } 941 942 /* 943 * Exclude offload EM xid range from next EM xid range. 944 */ 945 min_xid += lport->lro_xid + 1; 946 947 skip_oem: 948 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { 949 printk(KERN_ERR "fcoe_em_config: failed to " 950 "allocate em on interface %s\n", fcoe->netdev->name); 951 return -ENOMEM; 952 } 953 954 return 0; 955 } 956 957 /** 958 * fcoe_if_destroy() - Tear down a SW FCoE instance 959 * @lport: The local port to be destroyed 960 * 961 */ 962 static void fcoe_if_destroy(struct fc_lport *lport) 963 { 964 struct fcoe_port *port = lport_priv(lport); 965 struct fcoe_interface *fcoe = port->priv; 966 struct net_device *netdev = fcoe->netdev; 967 968 FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); 969 970 /* Logout of the fabric */ 971 fc_fabric_logoff(lport); 972 973 /* Cleanup the fc_lport */ 974 fc_lport_destroy(lport); 975 976 /* Stop the transmit retry timer */ 977 del_timer_sync(&port->timer); 978 979 /* Free existing transmit skbs */ 980 fcoe_clean_pending_queue(lport); 981 982 rtnl_lock(); 983 if (!is_zero_ether_addr(port->data_src_addr)) 984 dev_uc_del(netdev, port->data_src_addr); 985 if (lport->vport) 986 synchronize_net(); 987 else 988 fcoe_interface_remove(fcoe); 989 rtnl_unlock(); 990 991 /* Free queued packets for the per-CPU receive threads */ 992 fcoe_percpu_clean(lport); 993 994 /* Detach from the scsi-ml */ 995 fc_remove_host(lport->host); 996 scsi_remove_host(lport->host); 997 998 /* Destroy lport scsi_priv */ 999 fc_fcp_destroy(lport); 1000 1001 /* There are no more rports or I/O, free the EM */ 1002 fc_exch_mgr_free(lport); 1003 1004 /* Free memory used by statistical counters */ 1005 fc_lport_free_stats(lport); 1006 1007 /* 1008 * Release the Scsi_Host for vport but hold on to 1009 * master lport until it fcoe interface fully cleaned-up. 1010 */ 1011 if (lport->vport) 1012 scsi_host_put(lport->host); 1013 } 1014 1015 /** 1016 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device 1017 * @lport: The local port to setup DDP for 1018 * @xid: The exchange ID for this DDP transfer 1019 * @sgl: The scatterlist describing this transfer 1020 * @sgc: The number of sg items 1021 * 1022 * Returns: 0 if the DDP context was not configured 1023 */ 1024 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, 1025 struct scatterlist *sgl, unsigned int sgc) 1026 { 1027 struct net_device *netdev = fcoe_netdev(lport); 1028 1029 if (netdev->netdev_ops->ndo_fcoe_ddp_setup) 1030 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, 1031 xid, sgl, 1032 sgc); 1033 1034 return 0; 1035 } 1036 1037 /** 1038 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device 1039 * @lport: The local port to setup DDP for 1040 * @xid: The exchange ID for this DDP transfer 1041 * @sgl: The scatterlist describing this transfer 1042 * @sgc: The number of sg items 1043 * 1044 * Returns: 0 if the DDP context was not configured 1045 */ 1046 static int fcoe_ddp_target(struct fc_lport *lport, u16 xid, 1047 struct scatterlist *sgl, unsigned int sgc) 1048 { 1049 struct net_device *netdev = fcoe_netdev(lport); 1050 1051 if (netdev->netdev_ops->ndo_fcoe_ddp_target) 1052 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid, 1053 sgl, sgc); 1054 1055 return 0; 1056 } 1057 1058 1059 /** 1060 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device 1061 * @lport: The local port to complete DDP on 1062 * @xid: The exchange ID for this DDP transfer 1063 * 1064 * Returns: the length of data that have been completed by DDP 1065 */ 1066 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) 1067 { 1068 struct net_device *netdev = fcoe_netdev(lport); 1069 1070 if (netdev->netdev_ops->ndo_fcoe_ddp_done) 1071 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); 1072 return 0; 1073 } 1074 1075 /** 1076 * fcoe_if_create() - Create a FCoE instance on an interface 1077 * @fcoe: The FCoE interface to create a local port on 1078 * @parent: The device pointer to be the parent in sysfs for the SCSI host 1079 * @npiv: Indicates if the port is a vport or not 1080 * 1081 * Creates a fc_lport instance and a Scsi_Host instance and configure them. 1082 * 1083 * Returns: The allocated fc_lport or an error pointer 1084 */ 1085 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, 1086 struct device *parent, int npiv) 1087 { 1088 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 1089 struct net_device *netdev = fcoe->netdev; 1090 struct fc_lport *lport, *n_port; 1091 struct fcoe_port *port; 1092 struct Scsi_Host *shost; 1093 int rc; 1094 /* 1095 * parent is only a vport if npiv is 1, 1096 * but we'll only use vport in that case so go ahead and set it 1097 */ 1098 struct fc_vport *vport = dev_to_vport(parent); 1099 1100 FCOE_NETDEV_DBG(netdev, "Create Interface\n"); 1101 1102 if (!npiv) 1103 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port)); 1104 else 1105 lport = libfc_vport_create(vport, sizeof(*port)); 1106 1107 if (!lport) { 1108 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); 1109 rc = -ENOMEM; 1110 goto out; 1111 } 1112 port = lport_priv(lport); 1113 port->lport = lport; 1114 port->priv = fcoe; 1115 port->get_netdev = fcoe_netdev; 1116 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH; 1117 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH; 1118 INIT_WORK(&port->destroy_work, fcoe_destroy_work); 1119 1120 /* 1121 * Need to add the lport to the hostlist 1122 * so we catch NETDEV_CHANGE events. 1123 */ 1124 fcoe_hostlist_add(lport); 1125 1126 /* configure a fc_lport including the exchange manager */ 1127 rc = fcoe_lport_config(lport); 1128 if (rc) { 1129 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " 1130 "interface\n"); 1131 goto out_host_put; 1132 } 1133 1134 if (npiv) { 1135 FCOE_NETDEV_DBG(netdev, "Setting vport names, " 1136 "%16.16llx %16.16llx\n", 1137 vport->node_name, vport->port_name); 1138 fc_set_wwnn(lport, vport->node_name); 1139 fc_set_wwpn(lport, vport->port_name); 1140 } 1141 1142 /* configure lport network properties */ 1143 rc = fcoe_netdev_config(lport, netdev); 1144 if (rc) { 1145 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " 1146 "interface\n"); 1147 goto out_lp_destroy; 1148 } 1149 1150 /* configure lport scsi host properties */ 1151 rc = fcoe_shost_config(lport, parent); 1152 if (rc) { 1153 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " 1154 "interface\n"); 1155 goto out_lp_destroy; 1156 } 1157 1158 /* Initialize the library */ 1159 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1); 1160 if (rc) { 1161 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " 1162 "interface\n"); 1163 goto out_lp_destroy; 1164 } 1165 1166 /* Initialized FDMI information */ 1167 fcoe_fdmi_info(lport, netdev); 1168 1169 /* 1170 * fcoe_em_alloc() and fcoe_hostlist_add() both 1171 * need to be atomic with respect to other changes to the 1172 * hostlist since fcoe_em_alloc() looks for an existing EM 1173 * instance on host list updated by fcoe_hostlist_add(). 1174 * 1175 * This is currently handled through the fcoe_config_mutex 1176 * begin held. 1177 */ 1178 if (!npiv) 1179 /* lport exch manager allocation */ 1180 rc = fcoe_em_config(lport); 1181 else { 1182 shost = vport_to_shost(vport); 1183 n_port = shost_priv(shost); 1184 rc = fc_exch_mgr_list_clone(n_port, lport); 1185 } 1186 1187 if (rc) { 1188 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n"); 1189 goto out_lp_destroy; 1190 } 1191 1192 return lport; 1193 1194 out_lp_destroy: 1195 fc_exch_mgr_free(lport); 1196 out_host_put: 1197 fcoe_hostlist_del(lport); 1198 scsi_host_put(lport->host); 1199 out: 1200 return ERR_PTR(rc); 1201 } 1202 1203 /** 1204 * fcoe_if_init() - Initialization routine for fcoe.ko 1205 * 1206 * Attaches the SW FCoE transport to the FC transport 1207 * 1208 * Returns: 0 on success 1209 */ 1210 static int __init fcoe_if_init(void) 1211 { 1212 /* attach to scsi transport */ 1213 fcoe_nport_scsi_transport = 1214 fc_attach_transport(&fcoe_nport_fc_functions); 1215 fcoe_vport_scsi_transport = 1216 fc_attach_transport(&fcoe_vport_fc_functions); 1217 1218 if (!fcoe_nport_scsi_transport) { 1219 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); 1220 return -ENODEV; 1221 } 1222 1223 return 0; 1224 } 1225 1226 /** 1227 * fcoe_if_exit() - Tear down fcoe.ko 1228 * 1229 * Detaches the SW FCoE transport from the FC transport 1230 * 1231 * Returns: 0 on success 1232 */ 1233 static int __exit fcoe_if_exit(void) 1234 { 1235 fc_release_transport(fcoe_nport_scsi_transport); 1236 fc_release_transport(fcoe_vport_scsi_transport); 1237 fcoe_nport_scsi_transport = NULL; 1238 fcoe_vport_scsi_transport = NULL; 1239 return 0; 1240 } 1241 1242 static void fcoe_thread_cleanup_local(unsigned int cpu) 1243 { 1244 struct page *crc_eof; 1245 struct fcoe_percpu_s *p; 1246 1247 p = per_cpu_ptr(&fcoe_percpu, cpu); 1248 spin_lock_bh(&p->fcoe_rx_list.lock); 1249 crc_eof = p->crc_eof_page; 1250 p->crc_eof_page = NULL; 1251 p->crc_eof_offset = 0; 1252 spin_unlock_bh(&p->fcoe_rx_list.lock); 1253 1254 if (crc_eof) 1255 put_page(crc_eof); 1256 flush_work(&p->work); 1257 } 1258 1259 /** 1260 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming 1261 * command. 1262 * 1263 * This routine selects next CPU based on cpumask to distribute 1264 * incoming requests in round robin. 1265 * 1266 * Returns: int CPU number 1267 */ 1268 static inline unsigned int fcoe_select_cpu(void) 1269 { 1270 static unsigned int selected_cpu; 1271 1272 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask); 1273 if (selected_cpu >= nr_cpu_ids) 1274 selected_cpu = cpumask_first(cpu_online_mask); 1275 1276 return selected_cpu; 1277 } 1278 1279 /** 1280 * fcoe_rcv() - Receive packets from a net device 1281 * @skb: The received packet 1282 * @netdev: The net device that the packet was received on 1283 * @ptype: The packet type context 1284 * @olddev: The last device net device 1285 * 1286 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a 1287 * FC frame and passes the frame to libfc. 1288 * 1289 * Returns: 0 for success 1290 */ 1291 static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, 1292 struct packet_type *ptype, struct net_device *olddev) 1293 { 1294 struct fc_lport *lport; 1295 struct fcoe_rcv_info *fr; 1296 struct fcoe_ctlr *ctlr; 1297 struct fcoe_interface *fcoe; 1298 struct fc_frame_header *fh; 1299 struct fcoe_percpu_s *fps; 1300 struct ethhdr *eh; 1301 unsigned int cpu; 1302 1303 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); 1304 ctlr = fcoe_to_ctlr(fcoe); 1305 lport = ctlr->lp; 1306 if (unlikely(!lport)) { 1307 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n"); 1308 goto err2; 1309 } 1310 if (!lport->link_up) 1311 goto err2; 1312 1313 FCOE_NETDEV_DBG(netdev, 1314 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n", 1315 skb->len, skb->data_len, skb->head, skb->data, 1316 skb_tail_pointer(skb), skb_end_pointer(skb), 1317 skb->csum, skb->dev ? skb->dev->name : "<NULL>"); 1318 1319 1320 skb = skb_share_check(skb, GFP_ATOMIC); 1321 1322 if (skb == NULL) 1323 return NET_RX_DROP; 1324 1325 eh = eth_hdr(skb); 1326 1327 if (is_fip_mode(ctlr) && 1328 !ether_addr_equal(eh->h_source, ctlr->dest_addr)) { 1329 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n", 1330 eh->h_source); 1331 goto err; 1332 } 1333 1334 /* 1335 * Check for minimum frame length, and make sure required FCoE 1336 * and FC headers are pulled into the linear data area. 1337 */ 1338 if (unlikely((skb->len < FCOE_MIN_FRAME) || 1339 !pskb_may_pull(skb, FCOE_HEADER_LEN))) 1340 goto err; 1341 1342 skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); 1343 fh = (struct fc_frame_header *) skb_transport_header(skb); 1344 1345 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) { 1346 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n", 1347 eh->h_dest); 1348 goto err; 1349 } 1350 1351 fr = fcoe_dev_from_skb(skb); 1352 fr->fr_dev = lport; 1353 1354 /* 1355 * In case the incoming frame's exchange is originated from 1356 * the initiator, then received frame's exchange id is ANDed 1357 * with fc_cpu_mask bits to get the same cpu on which exchange 1358 * was originated, otherwise select cpu using rx exchange id 1359 * or fcoe_select_cpu(). 1360 */ 1361 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) 1362 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; 1363 else { 1364 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN) 1365 cpu = fcoe_select_cpu(); 1366 else 1367 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask; 1368 } 1369 1370 if (cpu >= nr_cpu_ids) 1371 goto err; 1372 1373 fps = &per_cpu(fcoe_percpu, cpu); 1374 spin_lock(&fps->fcoe_rx_list.lock); 1375 /* 1376 * We now have a valid CPU that we're targeting for 1377 * this skb. We also have this receive thread locked, 1378 * so we're free to queue skbs into it's queue. 1379 */ 1380 1381 /* 1382 * Note: We used to have a set of conditions under which we would 1383 * call fcoe_recv_frame directly, rather than queuing to the rx list 1384 * as it could save a few cycles, but doing so is prohibited, as 1385 * fcoe_recv_frame has several paths that may sleep, which is forbidden 1386 * in softirq context. 1387 */ 1388 __skb_queue_tail(&fps->fcoe_rx_list, skb); 1389 schedule_work_on(cpu, &fps->work); 1390 spin_unlock(&fps->fcoe_rx_list.lock); 1391 1392 return NET_RX_SUCCESS; 1393 err: 1394 per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++; 1395 put_cpu(); 1396 err2: 1397 kfree_skb(skb); 1398 return NET_RX_DROP; 1399 } 1400 1401 /** 1402 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC 1403 * @skb: The packet to be transmitted 1404 * @tlen: The total length of the trailer 1405 * 1406 * Returns: 0 for success 1407 */ 1408 static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen) 1409 { 1410 struct fcoe_percpu_s *fps; 1411 int rc; 1412 1413 fps = &get_cpu_var(fcoe_percpu); 1414 rc = fcoe_get_paged_crc_eof(skb, tlen, fps); 1415 put_cpu_var(fcoe_percpu); 1416 1417 return rc; 1418 } 1419 1420 /** 1421 * fcoe_xmit() - Transmit a FCoE frame 1422 * @lport: The local port that the frame is to be transmitted for 1423 * @fp: The frame to be transmitted 1424 * 1425 * Return: 0 for success 1426 */ 1427 static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) 1428 { 1429 int wlen; 1430 u32 crc; 1431 struct ethhdr *eh; 1432 struct fcoe_crc_eof *cp; 1433 struct sk_buff *skb; 1434 struct fc_stats *stats; 1435 struct fc_frame_header *fh; 1436 unsigned int hlen; /* header length implies the version */ 1437 unsigned int tlen; /* trailer length */ 1438 unsigned int elen; /* eth header, may include vlan */ 1439 struct fcoe_port *port = lport_priv(lport); 1440 struct fcoe_interface *fcoe = port->priv; 1441 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 1442 u8 sof, eof; 1443 struct fcoe_hdr *hp; 1444 1445 WARN_ON((fr_len(fp) % sizeof(u32)) != 0); 1446 1447 fh = fc_frame_header_get(fp); 1448 skb = fp_skb(fp); 1449 wlen = skb->len / FCOE_WORD_TO_BYTE; 1450 1451 if (!lport->link_up) { 1452 kfree_skb(skb); 1453 return 0; 1454 } 1455 1456 if (unlikely(fh->fh_type == FC_TYPE_ELS) && 1457 fcoe_ctlr_els_send(ctlr, lport, skb)) 1458 return 0; 1459 1460 sof = fr_sof(fp); 1461 eof = fr_eof(fp); 1462 1463 elen = sizeof(struct ethhdr); 1464 hlen = sizeof(struct fcoe_hdr); 1465 tlen = sizeof(struct fcoe_crc_eof); 1466 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; 1467 1468 /* crc offload */ 1469 if (likely(lport->crc_offload)) { 1470 skb->ip_summed = CHECKSUM_PARTIAL; 1471 skb->csum_start = skb_headroom(skb); 1472 skb->csum_offset = skb->len; 1473 crc = 0; 1474 } else { 1475 skb->ip_summed = CHECKSUM_NONE; 1476 crc = fcoe_fc_crc(fp); 1477 } 1478 1479 /* copy port crc and eof to the skb buff */ 1480 if (skb_is_nonlinear(skb)) { 1481 skb_frag_t *frag; 1482 if (fcoe_alloc_paged_crc_eof(skb, tlen)) { 1483 kfree_skb(skb); 1484 return -ENOMEM; 1485 } 1486 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; 1487 cp = kmap_atomic(skb_frag_page(frag)) 1488 + frag->page_offset; 1489 } else { 1490 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); 1491 } 1492 1493 memset(cp, 0, sizeof(*cp)); 1494 cp->fcoe_eof = eof; 1495 cp->fcoe_crc32 = cpu_to_le32(~crc); 1496 1497 if (skb_is_nonlinear(skb)) { 1498 kunmap_atomic(cp); 1499 cp = NULL; 1500 } 1501 1502 /* adjust skb network/transport offsets to match mac/fcoe/port */ 1503 skb_push(skb, elen + hlen); 1504 skb_reset_mac_header(skb); 1505 skb_reset_network_header(skb); 1506 skb->mac_len = elen; 1507 skb->protocol = htons(ETH_P_FCOE); 1508 skb->priority = fcoe->priority; 1509 1510 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN && 1511 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) { 1512 /* must set skb->dev before calling vlan_put_tag */ 1513 skb->dev = fcoe->realdev; 1514 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 1515 vlan_dev_vlan_id(fcoe->netdev)); 1516 } else 1517 skb->dev = fcoe->netdev; 1518 1519 /* fill up mac and fcoe headers */ 1520 eh = eth_hdr(skb); 1521 eh->h_proto = htons(ETH_P_FCOE); 1522 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN); 1523 if (ctlr->map_dest) 1524 memcpy(eh->h_dest + 3, fh->fh_d_id, 3); 1525 1526 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN)) 1527 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN); 1528 else 1529 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); 1530 1531 hp = (struct fcoe_hdr *)(eh + 1); 1532 memset(hp, 0, sizeof(*hp)); 1533 if (FC_FCOE_VER) 1534 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); 1535 hp->fcoe_sof = sof; 1536 1537 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ 1538 if (lport->seq_offload && fr_max_payload(fp)) { 1539 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; 1540 skb_shinfo(skb)->gso_size = fr_max_payload(fp); 1541 } else { 1542 skb_shinfo(skb)->gso_type = 0; 1543 skb_shinfo(skb)->gso_size = 0; 1544 } 1545 /* update tx stats: regardless if LLD fails */ 1546 stats = per_cpu_ptr(lport->stats, get_cpu()); 1547 stats->TxFrames++; 1548 stats->TxWords += wlen; 1549 put_cpu(); 1550 1551 /* send down to lld */ 1552 fr_dev(fp) = lport; 1553 fcoe_port_send(port, skb); 1554 return 0; 1555 } 1556 1557 /** 1558 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC 1559 * @lport: The local port the frame was received on 1560 * @fp: The received frame 1561 * 1562 * Return: 0 on passing filtering checks 1563 */ 1564 static inline int fcoe_filter_frames(struct fc_lport *lport, 1565 struct fc_frame *fp) 1566 { 1567 struct fcoe_ctlr *ctlr; 1568 struct fcoe_interface *fcoe; 1569 struct fc_frame_header *fh; 1570 struct sk_buff *skb = (struct sk_buff *)fp; 1571 struct fc_stats *stats; 1572 1573 /* 1574 * We only check CRC if no offload is available and if it is 1575 * it's solicited data, in which case, the FCP layer would 1576 * check it during the copy. 1577 */ 1578 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY) 1579 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 1580 else 1581 fr_flags(fp) |= FCPHF_CRC_UNCHECKED; 1582 1583 fh = (struct fc_frame_header *) skb_transport_header(skb); 1584 fh = fc_frame_header_get(fp); 1585 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP) 1586 return 0; 1587 1588 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv; 1589 ctlr = fcoe_to_ctlr(fcoe); 1590 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO && 1591 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) { 1592 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n"); 1593 return -EINVAL; 1594 } 1595 1596 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) || 1597 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) { 1598 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 1599 return 0; 1600 } 1601 1602 stats = per_cpu_ptr(lport->stats, get_cpu()); 1603 stats->InvalidCRCCount++; 1604 if (stats->InvalidCRCCount < 5) 1605 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n"); 1606 put_cpu(); 1607 return -EINVAL; 1608 } 1609 1610 /** 1611 * fcoe_recv_frame() - process a single received frame 1612 * @skb: frame to process 1613 */ 1614 static void fcoe_recv_frame(struct sk_buff *skb) 1615 { 1616 u32 fr_len; 1617 struct fc_lport *lport; 1618 struct fcoe_rcv_info *fr; 1619 struct fc_stats *stats; 1620 struct fcoe_crc_eof crc_eof; 1621 struct fc_frame *fp; 1622 struct fcoe_port *port; 1623 struct fcoe_hdr *hp; 1624 1625 fr = fcoe_dev_from_skb(skb); 1626 lport = fr->fr_dev; 1627 if (unlikely(!lport)) { 1628 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n"); 1629 kfree_skb(skb); 1630 return; 1631 } 1632 1633 FCOE_NETDEV_DBG(skb->dev, 1634 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n", 1635 skb->len, skb->data_len, 1636 skb->head, skb->data, skb_tail_pointer(skb), 1637 skb_end_pointer(skb), skb->csum, 1638 skb->dev ? skb->dev->name : "<NULL>"); 1639 1640 port = lport_priv(lport); 1641 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */ 1642 1643 /* 1644 * Frame length checks and setting up the header pointers 1645 * was done in fcoe_rcv already. 1646 */ 1647 hp = (struct fcoe_hdr *) skb_network_header(skb); 1648 1649 stats = per_cpu_ptr(lport->stats, get_cpu()); 1650 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { 1651 if (stats->ErrorFrames < 5) 1652 printk(KERN_WARNING "fcoe: FCoE version " 1653 "mismatch: The frame has " 1654 "version %x, but the " 1655 "initiator supports version " 1656 "%x\n", FC_FCOE_DECAPS_VER(hp), 1657 FC_FCOE_VER); 1658 goto drop; 1659 } 1660 1661 skb_pull(skb, sizeof(struct fcoe_hdr)); 1662 fr_len = skb->len - sizeof(struct fcoe_crc_eof); 1663 1664 stats->RxFrames++; 1665 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; 1666 1667 fp = (struct fc_frame *)skb; 1668 fc_frame_init(fp); 1669 fr_dev(fp) = lport; 1670 fr_sof(fp) = hp->fcoe_sof; 1671 1672 /* Copy out the CRC and EOF trailer for access */ 1673 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) 1674 goto drop; 1675 fr_eof(fp) = crc_eof.fcoe_eof; 1676 fr_crc(fp) = crc_eof.fcoe_crc32; 1677 if (pskb_trim(skb, fr_len)) 1678 goto drop; 1679 1680 if (!fcoe_filter_frames(lport, fp)) { 1681 put_cpu(); 1682 fc_exch_recv(lport, fp); 1683 return; 1684 } 1685 drop: 1686 stats->ErrorFrames++; 1687 put_cpu(); 1688 kfree_skb(skb); 1689 } 1690 1691 /** 1692 * fcoe_receive_work() - The per-CPU worker 1693 * @work: The work struct 1694 * 1695 */ 1696 static void fcoe_receive_work(struct work_struct *work) 1697 { 1698 struct fcoe_percpu_s *p; 1699 struct sk_buff *skb; 1700 struct sk_buff_head tmp; 1701 1702 p = container_of(work, struct fcoe_percpu_s, work); 1703 skb_queue_head_init(&tmp); 1704 1705 spin_lock_bh(&p->fcoe_rx_list.lock); 1706 skb_queue_splice_init(&p->fcoe_rx_list, &tmp); 1707 spin_unlock_bh(&p->fcoe_rx_list.lock); 1708 1709 if (!skb_queue_len(&tmp)) 1710 return; 1711 1712 while ((skb = __skb_dequeue(&tmp))) 1713 fcoe_recv_frame(skb); 1714 } 1715 1716 /** 1717 * fcoe_dev_setup() - Setup the link change notification interface 1718 */ 1719 static void fcoe_dev_setup(void) 1720 { 1721 register_dcbevent_notifier(&dcb_notifier); 1722 register_netdevice_notifier(&fcoe_notifier); 1723 } 1724 1725 /** 1726 * fcoe_dev_cleanup() - Cleanup the link change notification interface 1727 */ 1728 static void fcoe_dev_cleanup(void) 1729 { 1730 unregister_dcbevent_notifier(&dcb_notifier); 1731 unregister_netdevice_notifier(&fcoe_notifier); 1732 } 1733 1734 static struct fcoe_interface * 1735 fcoe_hostlist_lookup_realdev_port(struct net_device *netdev) 1736 { 1737 struct fcoe_interface *fcoe; 1738 struct net_device *real_dev; 1739 1740 list_for_each_entry(fcoe, &fcoe_hostlist, list) { 1741 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) 1742 real_dev = vlan_dev_real_dev(fcoe->netdev); 1743 else 1744 real_dev = fcoe->netdev; 1745 1746 if (netdev == real_dev) 1747 return fcoe; 1748 } 1749 return NULL; 1750 } 1751 1752 static int fcoe_dcb_app_notification(struct notifier_block *notifier, 1753 ulong event, void *ptr) 1754 { 1755 struct dcb_app_type *entry = ptr; 1756 struct fcoe_ctlr *ctlr; 1757 struct fcoe_interface *fcoe; 1758 struct net_device *netdev; 1759 int prio; 1760 1761 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE) 1762 return NOTIFY_OK; 1763 1764 netdev = dev_get_by_index(&init_net, entry->ifindex); 1765 if (!netdev) 1766 return NOTIFY_OK; 1767 1768 fcoe = fcoe_hostlist_lookup_realdev_port(netdev); 1769 dev_put(netdev); 1770 if (!fcoe) 1771 return NOTIFY_OK; 1772 1773 ctlr = fcoe_to_ctlr(fcoe); 1774 1775 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE) 1776 prio = ffs(entry->app.priority) - 1; 1777 else 1778 prio = entry->app.priority; 1779 1780 if (prio < 0) 1781 return NOTIFY_OK; 1782 1783 if (entry->app.protocol == ETH_P_FIP || 1784 entry->app.protocol == ETH_P_FCOE) 1785 ctlr->priority = prio; 1786 1787 if (entry->app.protocol == ETH_P_FCOE) 1788 fcoe->priority = prio; 1789 1790 return NOTIFY_OK; 1791 } 1792 1793 /** 1794 * fcoe_device_notification() - Handler for net device events 1795 * @notifier: The context of the notification 1796 * @event: The type of event 1797 * @ptr: The net device that the event was on 1798 * 1799 * This function is called by the Ethernet driver in case of link change event. 1800 * 1801 * Returns: 0 for success 1802 */ 1803 static int fcoe_device_notification(struct notifier_block *notifier, 1804 ulong event, void *ptr) 1805 { 1806 struct fcoe_ctlr_device *cdev; 1807 struct fc_lport *lport = NULL; 1808 struct net_device *netdev = netdev_notifier_info_to_dev(ptr); 1809 struct fcoe_ctlr *ctlr; 1810 struct fcoe_interface *fcoe; 1811 struct fcoe_port *port; 1812 struct fc_stats *stats; 1813 u32 link_possible = 1; 1814 u32 mfs; 1815 int rc = NOTIFY_OK; 1816 1817 list_for_each_entry(fcoe, &fcoe_hostlist, list) { 1818 if (fcoe->netdev == netdev) { 1819 ctlr = fcoe_to_ctlr(fcoe); 1820 lport = ctlr->lp; 1821 break; 1822 } 1823 } 1824 if (!lport) { 1825 rc = NOTIFY_DONE; 1826 goto out; 1827 } 1828 1829 switch (event) { 1830 case NETDEV_DOWN: 1831 case NETDEV_GOING_DOWN: 1832 link_possible = 0; 1833 break; 1834 case NETDEV_UP: 1835 case NETDEV_CHANGE: 1836 break; 1837 case NETDEV_CHANGEMTU: 1838 if (netdev->features & NETIF_F_FCOE_MTU) 1839 break; 1840 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + 1841 sizeof(struct fcoe_crc_eof)); 1842 if (mfs >= FC_MIN_MAX_FRAME) 1843 fc_set_mfs(lport, mfs); 1844 break; 1845 case NETDEV_REGISTER: 1846 break; 1847 case NETDEV_UNREGISTER: 1848 list_del(&fcoe->list); 1849 port = lport_priv(ctlr->lp); 1850 queue_work(fcoe_wq, &port->destroy_work); 1851 goto out; 1852 break; 1853 case NETDEV_FEAT_CHANGE: 1854 fcoe_netdev_features_change(lport, netdev); 1855 break; 1856 default: 1857 FCOE_NETDEV_DBG(netdev, "Unknown event %ld " 1858 "from netdev netlink\n", event); 1859 } 1860 1861 fcoe_link_speed_update(lport); 1862 1863 cdev = fcoe_ctlr_to_ctlr_dev(ctlr); 1864 1865 if (link_possible && !fcoe_link_ok(lport)) { 1866 switch (cdev->enabled) { 1867 case FCOE_CTLR_DISABLED: 1868 pr_info("Link up while interface is disabled.\n"); 1869 break; 1870 case FCOE_CTLR_ENABLED: 1871 case FCOE_CTLR_UNUSED: 1872 fcoe_ctlr_link_up(ctlr); 1873 }; 1874 } else if (fcoe_ctlr_link_down(ctlr)) { 1875 switch (cdev->enabled) { 1876 case FCOE_CTLR_DISABLED: 1877 pr_info("Link down while interface is disabled.\n"); 1878 break; 1879 case FCOE_CTLR_ENABLED: 1880 case FCOE_CTLR_UNUSED: 1881 stats = per_cpu_ptr(lport->stats, get_cpu()); 1882 stats->LinkFailureCount++; 1883 put_cpu(); 1884 fcoe_clean_pending_queue(lport); 1885 }; 1886 } 1887 out: 1888 return rc; 1889 } 1890 1891 /** 1892 * fcoe_disable() - Disables a FCoE interface 1893 * @netdev : The net_device object the Ethernet interface to create on 1894 * 1895 * Called from fcoe transport. 1896 * 1897 * Returns: 0 for success 1898 * 1899 * Deprecated: use fcoe_ctlr_enabled() 1900 */ 1901 static int fcoe_disable(struct net_device *netdev) 1902 { 1903 struct fcoe_ctlr *ctlr; 1904 struct fcoe_interface *fcoe; 1905 int rc = 0; 1906 1907 mutex_lock(&fcoe_config_mutex); 1908 1909 rtnl_lock(); 1910 fcoe = fcoe_hostlist_lookup_port(netdev); 1911 rtnl_unlock(); 1912 1913 if (fcoe) { 1914 ctlr = fcoe_to_ctlr(fcoe); 1915 fcoe_ctlr_link_down(ctlr); 1916 fcoe_clean_pending_queue(ctlr->lp); 1917 } else 1918 rc = -ENODEV; 1919 1920 mutex_unlock(&fcoe_config_mutex); 1921 return rc; 1922 } 1923 1924 /** 1925 * fcoe_enable() - Enables a FCoE interface 1926 * @netdev : The net_device object the Ethernet interface to create on 1927 * 1928 * Called from fcoe transport. 1929 * 1930 * Returns: 0 for success 1931 */ 1932 static int fcoe_enable(struct net_device *netdev) 1933 { 1934 struct fcoe_ctlr *ctlr; 1935 struct fcoe_interface *fcoe; 1936 int rc = 0; 1937 1938 mutex_lock(&fcoe_config_mutex); 1939 rtnl_lock(); 1940 fcoe = fcoe_hostlist_lookup_port(netdev); 1941 rtnl_unlock(); 1942 1943 if (!fcoe) { 1944 rc = -ENODEV; 1945 goto out; 1946 } 1947 1948 ctlr = fcoe_to_ctlr(fcoe); 1949 1950 if (!fcoe_link_ok(ctlr->lp)) 1951 fcoe_ctlr_link_up(ctlr); 1952 1953 out: 1954 mutex_unlock(&fcoe_config_mutex); 1955 return rc; 1956 } 1957 1958 /** 1959 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller 1960 * @cdev: The FCoE Controller that is being enabled or disabled 1961 * 1962 * fcoe_sysfs will ensure that the state of 'enabled' has 1963 * changed, so no checking is necessary here. This routine simply 1964 * calls fcoe_enable or fcoe_disable, both of which are deprecated. 1965 * When those routines are removed the functionality can be merged 1966 * here. 1967 */ 1968 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev) 1969 { 1970 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev); 1971 struct fc_lport *lport = ctlr->lp; 1972 struct net_device *netdev = fcoe_netdev(lport); 1973 1974 switch (cdev->enabled) { 1975 case FCOE_CTLR_ENABLED: 1976 return fcoe_enable(netdev); 1977 case FCOE_CTLR_DISABLED: 1978 return fcoe_disable(netdev); 1979 case FCOE_CTLR_UNUSED: 1980 default: 1981 return -ENOTSUPP; 1982 }; 1983 } 1984 1985 /** 1986 * fcoe_ctlr_mode() - Switch FIP mode 1987 * @cdev: The FCoE Controller that is being modified 1988 * 1989 * When the FIP mode has been changed we need to update 1990 * the multicast addresses to ensure we get the correct 1991 * frames. 1992 */ 1993 static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev) 1994 { 1995 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); 1996 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr); 1997 1998 if (ctlr_dev->mode == FIP_CONN_TYPE_VN2VN && 1999 ctlr->mode != FIP_MODE_VN2VN) { 2000 dev_mc_del(fcoe->netdev, FIP_ALL_ENODE_MACS); 2001 dev_mc_add(fcoe->netdev, FIP_ALL_VN2VN_MACS); 2002 dev_mc_add(fcoe->netdev, FIP_ALL_P2P_MACS); 2003 } else if (ctlr->mode != FIP_MODE_FABRIC) { 2004 dev_mc_del(fcoe->netdev, FIP_ALL_VN2VN_MACS); 2005 dev_mc_del(fcoe->netdev, FIP_ALL_P2P_MACS); 2006 dev_mc_add(fcoe->netdev, FIP_ALL_ENODE_MACS); 2007 } 2008 fcoe_ctlr_set_fip_mode(ctlr_dev); 2009 } 2010 2011 /** 2012 * fcoe_destroy() - Destroy a FCoE interface 2013 * @netdev : The net_device object the Ethernet interface to create on 2014 * 2015 * Called from fcoe transport 2016 * 2017 * Returns: 0 for success 2018 */ 2019 static int fcoe_destroy(struct net_device *netdev) 2020 { 2021 struct fcoe_ctlr *ctlr; 2022 struct fcoe_interface *fcoe; 2023 struct fc_lport *lport; 2024 struct fcoe_port *port; 2025 int rc = 0; 2026 2027 mutex_lock(&fcoe_config_mutex); 2028 rtnl_lock(); 2029 fcoe = fcoe_hostlist_lookup_port(netdev); 2030 if (!fcoe) { 2031 rc = -ENODEV; 2032 goto out_nodev; 2033 } 2034 ctlr = fcoe_to_ctlr(fcoe); 2035 lport = ctlr->lp; 2036 port = lport_priv(lport); 2037 list_del(&fcoe->list); 2038 queue_work(fcoe_wq, &port->destroy_work); 2039 out_nodev: 2040 rtnl_unlock(); 2041 mutex_unlock(&fcoe_config_mutex); 2042 return rc; 2043 } 2044 2045 /** 2046 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context 2047 * @work: Handle to the FCoE port to be destroyed 2048 */ 2049 static void fcoe_destroy_work(struct work_struct *work) 2050 { 2051 struct fcoe_ctlr_device *cdev; 2052 struct fcoe_ctlr *ctlr; 2053 struct fcoe_port *port; 2054 struct fcoe_interface *fcoe; 2055 struct Scsi_Host *shost; 2056 struct fc_host_attrs *fc_host; 2057 unsigned long flags; 2058 struct fc_vport *vport; 2059 struct fc_vport *next_vport; 2060 2061 port = container_of(work, struct fcoe_port, destroy_work); 2062 shost = port->lport->host; 2063 fc_host = shost_to_fc_host(shost); 2064 2065 /* Loop through all the vports and mark them for deletion */ 2066 spin_lock_irqsave(shost->host_lock, flags); 2067 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) { 2068 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { 2069 continue; 2070 } else { 2071 vport->flags |= FC_VPORT_DELETING; 2072 queue_work(fc_host_work_q(shost), 2073 &vport->vport_delete_work); 2074 } 2075 } 2076 spin_unlock_irqrestore(shost->host_lock, flags); 2077 2078 flush_workqueue(fc_host_work_q(shost)); 2079 2080 mutex_lock(&fcoe_config_mutex); 2081 2082 fcoe = port->priv; 2083 ctlr = fcoe_to_ctlr(fcoe); 2084 cdev = fcoe_ctlr_to_ctlr_dev(ctlr); 2085 2086 fcoe_if_destroy(port->lport); 2087 fcoe_interface_cleanup(fcoe); 2088 2089 mutex_unlock(&fcoe_config_mutex); 2090 2091 fcoe_ctlr_device_delete(cdev); 2092 } 2093 2094 /** 2095 * fcoe_match() - Check if the FCoE is supported on the given netdevice 2096 * @netdev : The net_device object the Ethernet interface to create on 2097 * 2098 * Called from fcoe transport. 2099 * 2100 * Returns: always returns true as this is the default FCoE transport, 2101 * i.e., support all netdevs. 2102 */ 2103 static bool fcoe_match(struct net_device *netdev) 2104 { 2105 return true; 2106 } 2107 2108 /** 2109 * fcoe_dcb_create() - Initialize DCB attributes and hooks 2110 * @netdev: The net_device object of the L2 link that should be queried 2111 * @port: The fcoe_port to bind FCoE APP priority with 2112 * @ 2113 */ 2114 static void fcoe_dcb_create(struct fcoe_interface *fcoe) 2115 { 2116 #ifdef CONFIG_DCB 2117 int dcbx; 2118 u8 fup, up; 2119 struct net_device *netdev = fcoe->realdev; 2120 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 2121 struct dcb_app app = { 2122 .priority = 0, 2123 .protocol = ETH_P_FCOE 2124 }; 2125 2126 /* setup DCB priority attributes. */ 2127 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) { 2128 dcbx = netdev->dcbnl_ops->getdcbx(netdev); 2129 2130 if (dcbx & DCB_CAP_DCBX_VER_IEEE) { 2131 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE; 2132 up = dcb_ieee_getapp_mask(netdev, &app); 2133 app.protocol = ETH_P_FIP; 2134 fup = dcb_ieee_getapp_mask(netdev, &app); 2135 } else { 2136 app.selector = DCB_APP_IDTYPE_ETHTYPE; 2137 up = dcb_getapp(netdev, &app); 2138 app.protocol = ETH_P_FIP; 2139 fup = dcb_getapp(netdev, &app); 2140 } 2141 2142 fcoe->priority = ffs(up) ? ffs(up) - 1 : 0; 2143 ctlr->priority = ffs(fup) ? ffs(fup) - 1 : fcoe->priority; 2144 } 2145 #endif 2146 } 2147 2148 enum fcoe_create_link_state { 2149 FCOE_CREATE_LINK_DOWN, 2150 FCOE_CREATE_LINK_UP, 2151 }; 2152 2153 /** 2154 * _fcoe_create() - (internal) Create a fcoe interface 2155 * @netdev : The net_device object the Ethernet interface to create on 2156 * @fip_mode: The FIP mode for this creation 2157 * @link_state: The ctlr link state on creation 2158 * 2159 * Called from either the libfcoe 'create' module parameter 2160 * via fcoe_create or from fcoe_syfs's ctlr_create file. 2161 * 2162 * libfcoe's 'create' module parameter is deprecated so some 2163 * consolidation of code can be done when that interface is 2164 * removed. 2165 */ 2166 static int _fcoe_create(struct net_device *netdev, enum fip_mode fip_mode, 2167 enum fcoe_create_link_state link_state) 2168 { 2169 int rc = 0; 2170 struct fcoe_ctlr_device *ctlr_dev; 2171 struct fcoe_ctlr *ctlr; 2172 struct fcoe_interface *fcoe; 2173 struct fc_lport *lport; 2174 2175 mutex_lock(&fcoe_config_mutex); 2176 rtnl_lock(); 2177 2178 /* look for existing lport */ 2179 if (fcoe_hostlist_lookup(netdev)) { 2180 rc = -EEXIST; 2181 goto out_nodev; 2182 } 2183 2184 fcoe = fcoe_interface_create(netdev, fip_mode); 2185 if (IS_ERR(fcoe)) { 2186 rc = PTR_ERR(fcoe); 2187 goto out_nodev; 2188 } 2189 2190 ctlr = fcoe_to_ctlr(fcoe); 2191 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr); 2192 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0); 2193 if (IS_ERR(lport)) { 2194 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", 2195 netdev->name); 2196 rc = -EIO; 2197 rtnl_unlock(); 2198 fcoe_interface_cleanup(fcoe); 2199 mutex_unlock(&fcoe_config_mutex); 2200 fcoe_ctlr_device_delete(ctlr_dev); 2201 goto out; 2202 } 2203 2204 /* Make this the "master" N_Port */ 2205 ctlr->lp = lport; 2206 2207 /* setup DCB priority attributes. */ 2208 fcoe_dcb_create(fcoe); 2209 2210 /* start FIP Discovery and FLOGI */ 2211 lport->boot_time = jiffies; 2212 fc_fabric_login(lport); 2213 2214 /* 2215 * If the fcoe_ctlr_device is to be set to DISABLED 2216 * it must be done after the lport is added to the 2217 * hostlist, but before the rtnl_lock is released. 2218 * This is because the rtnl_lock protects the 2219 * hostlist that fcoe_device_notification uses. If 2220 * the FCoE Controller is intended to be created 2221 * DISABLED then 'enabled' needs to be considered 2222 * handling link events. 'enabled' must be set 2223 * before the lport can be found in the hostlist 2224 * when a link up event is received. 2225 */ 2226 if (link_state == FCOE_CREATE_LINK_UP) 2227 ctlr_dev->enabled = FCOE_CTLR_ENABLED; 2228 else 2229 ctlr_dev->enabled = FCOE_CTLR_DISABLED; 2230 2231 if (link_state == FCOE_CREATE_LINK_UP && 2232 !fcoe_link_ok(lport)) { 2233 rtnl_unlock(); 2234 fcoe_ctlr_link_up(ctlr); 2235 mutex_unlock(&fcoe_config_mutex); 2236 return rc; 2237 } 2238 2239 out_nodev: 2240 rtnl_unlock(); 2241 mutex_unlock(&fcoe_config_mutex); 2242 out: 2243 return rc; 2244 } 2245 2246 /** 2247 * fcoe_create() - Create a fcoe interface 2248 * @netdev : The net_device object the Ethernet interface to create on 2249 * @fip_mode: The FIP mode for this creation 2250 * 2251 * Called from fcoe transport 2252 * 2253 * Returns: 0 for success 2254 */ 2255 static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode) 2256 { 2257 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP); 2258 } 2259 2260 /** 2261 * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs 2262 * @netdev: The net_device to be used by the allocated FCoE Controller 2263 * 2264 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr 2265 * in a link_down state. The allows the user an opportunity to configure 2266 * the FCoE Controller from sysfs before enabling the FCoE Controller. 2267 * 2268 * Creating in with this routine starts the FCoE Controller in Fabric 2269 * mode. The user can change to VN2VN or another mode before enabling. 2270 */ 2271 static int fcoe_ctlr_alloc(struct net_device *netdev) 2272 { 2273 return _fcoe_create(netdev, FIP_MODE_FABRIC, 2274 FCOE_CREATE_LINK_DOWN); 2275 } 2276 2277 /** 2278 * fcoe_link_ok() - Check if the link is OK for a local port 2279 * @lport: The local port to check link on 2280 * 2281 * Returns: 0 if link is UP and OK, -1 if not 2282 * 2283 */ 2284 static int fcoe_link_ok(struct fc_lport *lport) 2285 { 2286 struct net_device *netdev = fcoe_netdev(lport); 2287 2288 if (netif_oper_up(netdev)) 2289 return 0; 2290 return -1; 2291 } 2292 2293 /** 2294 * fcoe_percpu_clean() - Clear all pending skbs for an local port 2295 * @lport: The local port whose skbs are to be cleared 2296 * 2297 * Must be called with fcoe_create_mutex held to single-thread completion. 2298 * 2299 * This flushes the pending skbs by flush the work item for each CPU. The work 2300 * item on each possible CPU is flushed because we may have used the per-CPU 2301 * struct of an offline CPU. 2302 */ 2303 static void fcoe_percpu_clean(struct fc_lport *lport) 2304 { 2305 struct fcoe_percpu_s *pp; 2306 unsigned int cpu; 2307 2308 for_each_possible_cpu(cpu) { 2309 pp = &per_cpu(fcoe_percpu, cpu); 2310 2311 flush_work(&pp->work); 2312 } 2313 } 2314 2315 /** 2316 * fcoe_reset() - Reset a local port 2317 * @shost: The SCSI host associated with the local port to be reset 2318 * 2319 * Returns: Always 0 (return value required by FC transport template) 2320 */ 2321 static int fcoe_reset(struct Scsi_Host *shost) 2322 { 2323 struct fc_lport *lport = shost_priv(shost); 2324 struct fcoe_port *port = lport_priv(lport); 2325 struct fcoe_interface *fcoe = port->priv; 2326 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 2327 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr); 2328 2329 fcoe_ctlr_link_down(ctlr); 2330 fcoe_clean_pending_queue(ctlr->lp); 2331 2332 if (cdev->enabled != FCOE_CTLR_DISABLED && 2333 !fcoe_link_ok(ctlr->lp)) 2334 fcoe_ctlr_link_up(ctlr); 2335 return 0; 2336 } 2337 2338 /** 2339 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device 2340 * @netdev: The net device used as a key 2341 * 2342 * Locking: Must be called with the RNL mutex held. 2343 * 2344 * Returns: NULL or the FCoE interface 2345 */ 2346 static struct fcoe_interface * 2347 fcoe_hostlist_lookup_port(const struct net_device *netdev) 2348 { 2349 struct fcoe_interface *fcoe; 2350 2351 list_for_each_entry(fcoe, &fcoe_hostlist, list) { 2352 if (fcoe->netdev == netdev) 2353 return fcoe; 2354 } 2355 return NULL; 2356 } 2357 2358 /** 2359 * fcoe_hostlist_lookup() - Find the local port associated with a 2360 * given net device 2361 * @netdev: The netdevice used as a key 2362 * 2363 * Locking: Must be called with the RTNL mutex held 2364 * 2365 * Returns: NULL or the local port 2366 */ 2367 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) 2368 { 2369 struct fcoe_ctlr *ctlr; 2370 struct fcoe_interface *fcoe; 2371 2372 fcoe = fcoe_hostlist_lookup_port(netdev); 2373 ctlr = fcoe_to_ctlr(fcoe); 2374 return (fcoe) ? ctlr->lp : NULL; 2375 } 2376 2377 /** 2378 * fcoe_hostlist_add() - Add the FCoE interface identified by a local 2379 * port to the hostlist 2380 * @lport: The local port that identifies the FCoE interface to be added 2381 * 2382 * Locking: must be called with the RTNL mutex held 2383 * 2384 * Returns: 0 for success 2385 */ 2386 static int fcoe_hostlist_add(const struct fc_lport *lport) 2387 { 2388 struct fcoe_interface *fcoe; 2389 struct fcoe_port *port; 2390 2391 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); 2392 if (!fcoe) { 2393 port = lport_priv(lport); 2394 fcoe = port->priv; 2395 list_add_tail(&fcoe->list, &fcoe_hostlist); 2396 } 2397 return 0; 2398 } 2399 2400 /** 2401 * fcoe_hostlist_del() - Remove the FCoE interface identified by a local 2402 * port to the hostlist 2403 * @lport: The local port that identifies the FCoE interface to be added 2404 * 2405 * Locking: must be called with the RTNL mutex held 2406 * 2407 */ 2408 static void fcoe_hostlist_del(const struct fc_lport *lport) 2409 { 2410 struct fcoe_interface *fcoe; 2411 struct fcoe_port *port; 2412 2413 port = lport_priv(lport); 2414 fcoe = port->priv; 2415 list_del(&fcoe->list); 2416 return; 2417 } 2418 2419 static struct fcoe_transport fcoe_sw_transport = { 2420 .name = {FCOE_TRANSPORT_DEFAULT}, 2421 .attached = false, 2422 .list = LIST_HEAD_INIT(fcoe_sw_transport.list), 2423 .match = fcoe_match, 2424 .alloc = fcoe_ctlr_alloc, 2425 .create = fcoe_create, 2426 .destroy = fcoe_destroy, 2427 .enable = fcoe_enable, 2428 .disable = fcoe_disable, 2429 }; 2430 2431 /** 2432 * fcoe_init() - Initialize fcoe.ko 2433 * 2434 * Returns: 0 on success, or a negative value on failure 2435 */ 2436 static int __init fcoe_init(void) 2437 { 2438 struct fcoe_percpu_s *p; 2439 unsigned int cpu; 2440 int rc = 0; 2441 2442 fcoe_wq = alloc_workqueue("fcoe", 0, 0); 2443 if (!fcoe_wq) 2444 return -ENOMEM; 2445 2446 /* register as a fcoe transport */ 2447 rc = fcoe_transport_attach(&fcoe_sw_transport); 2448 if (rc) { 2449 printk(KERN_ERR "failed to register an fcoe transport, check " 2450 "if libfcoe is loaded\n"); 2451 return rc; 2452 } 2453 2454 mutex_lock(&fcoe_config_mutex); 2455 2456 for_each_possible_cpu(cpu) { 2457 p = per_cpu_ptr(&fcoe_percpu, cpu); 2458 INIT_WORK(&p->work, fcoe_receive_work); 2459 skb_queue_head_init(&p->fcoe_rx_list); 2460 } 2461 2462 /* Setup link change notification */ 2463 fcoe_dev_setup(); 2464 2465 rc = fcoe_if_init(); 2466 if (rc) 2467 goto out_free; 2468 2469 mutex_unlock(&fcoe_config_mutex); 2470 return 0; 2471 2472 out_free: 2473 mutex_unlock(&fcoe_config_mutex); 2474 destroy_workqueue(fcoe_wq); 2475 return rc; 2476 } 2477 module_init(fcoe_init); 2478 2479 /** 2480 * fcoe_exit() - Clean up fcoe.ko 2481 * 2482 * Returns: 0 on success or a negative value on failure 2483 */ 2484 static void __exit fcoe_exit(void) 2485 { 2486 struct fcoe_interface *fcoe, *tmp; 2487 struct fcoe_ctlr *ctlr; 2488 struct fcoe_port *port; 2489 unsigned int cpu; 2490 2491 mutex_lock(&fcoe_config_mutex); 2492 2493 fcoe_dev_cleanup(); 2494 2495 /* releases the associated fcoe hosts */ 2496 rtnl_lock(); 2497 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { 2498 ctlr = fcoe_to_ctlr(fcoe); 2499 port = lport_priv(ctlr->lp); 2500 fcoe_hostlist_del(port->lport); 2501 queue_work(fcoe_wq, &port->destroy_work); 2502 } 2503 rtnl_unlock(); 2504 2505 for_each_possible_cpu(cpu) 2506 fcoe_thread_cleanup_local(cpu); 2507 2508 mutex_unlock(&fcoe_config_mutex); 2509 2510 /* 2511 * destroy_work's may be chained but destroy_workqueue() 2512 * can take care of them. Just kill the fcoe_wq. 2513 */ 2514 destroy_workqueue(fcoe_wq); 2515 2516 /* 2517 * Detaching from the scsi transport must happen after all 2518 * destroys are done on the fcoe_wq. destroy_workqueue will 2519 * enusre the fcoe_wq is flushed. 2520 */ 2521 fcoe_if_exit(); 2522 2523 /* detach from fcoe transport */ 2524 fcoe_transport_detach(&fcoe_sw_transport); 2525 } 2526 module_exit(fcoe_exit); 2527 2528 /** 2529 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler 2530 * @seq: active sequence in the FLOGI or FDISC exchange 2531 * @fp: response frame, or error encoded in a pointer (timeout) 2532 * @arg: pointer the the fcoe_ctlr structure 2533 * 2534 * This handles MAC address management for FCoE, then passes control on to 2535 * the libfc FLOGI response handler. 2536 */ 2537 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) 2538 { 2539 struct fcoe_ctlr *fip = arg; 2540 struct fc_exch *exch = fc_seq_exch(seq); 2541 struct fc_lport *lport = exch->lp; 2542 u8 *mac; 2543 2544 if (IS_ERR(fp)) 2545 goto done; 2546 2547 mac = fr_cb(fp)->granted_mac; 2548 /* pre-FIP */ 2549 if (is_zero_ether_addr(mac)) 2550 fcoe_ctlr_recv_flogi(fip, lport, fp); 2551 if (!is_zero_ether_addr(mac)) 2552 fcoe_update_src_mac(lport, mac); 2553 done: 2554 fc_lport_flogi_resp(seq, fp, lport); 2555 } 2556 2557 /** 2558 * fcoe_logo_resp() - FCoE specific LOGO response handler 2559 * @seq: active sequence in the LOGO exchange 2560 * @fp: response frame, or error encoded in a pointer (timeout) 2561 * @arg: pointer the the fcoe_ctlr structure 2562 * 2563 * This handles MAC address management for FCoE, then passes control on to 2564 * the libfc LOGO response handler. 2565 */ 2566 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) 2567 { 2568 struct fc_lport *lport = arg; 2569 static u8 zero_mac[ETH_ALEN] = { 0 }; 2570 2571 if (!IS_ERR(fp)) 2572 fcoe_update_src_mac(lport, zero_mac); 2573 fc_lport_logo_resp(seq, fp, lport); 2574 } 2575 2576 /** 2577 * fcoe_elsct_send - FCoE specific ELS handler 2578 * 2579 * This does special case handling of FIP encapsualted ELS exchanges for FCoE, 2580 * using FCoE specific response handlers and passing the FIP controller as 2581 * the argument (the lport is still available from the exchange). 2582 * 2583 * Most of the work here is just handed off to the libfc routine. 2584 */ 2585 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, 2586 struct fc_frame *fp, unsigned int op, 2587 void (*resp)(struct fc_seq *, 2588 struct fc_frame *, 2589 void *), 2590 void *arg, u32 timeout) 2591 { 2592 struct fcoe_port *port = lport_priv(lport); 2593 struct fcoe_interface *fcoe = port->priv; 2594 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 2595 struct fc_frame_header *fh = fc_frame_header_get(fp); 2596 2597 switch (op) { 2598 case ELS_FLOGI: 2599 case ELS_FDISC: 2600 if (lport->point_to_multipoint) 2601 break; 2602 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, 2603 fip, timeout); 2604 case ELS_LOGO: 2605 /* only hook onto fabric logouts, not port logouts */ 2606 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) 2607 break; 2608 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, 2609 lport, timeout); 2610 } 2611 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); 2612 } 2613 2614 /** 2615 * fcoe_vport_create() - create an fc_host/scsi_host for a vport 2616 * @vport: fc_vport object to create a new fc_host for 2617 * @disabled: start the new fc_host in a disabled state by default? 2618 * 2619 * Returns: 0 for success 2620 */ 2621 static int fcoe_vport_create(struct fc_vport *vport, bool disabled) 2622 { 2623 struct Scsi_Host *shost = vport_to_shost(vport); 2624 struct fc_lport *n_port = shost_priv(shost); 2625 struct fcoe_port *port = lport_priv(n_port); 2626 struct fcoe_interface *fcoe = port->priv; 2627 struct net_device *netdev = fcoe->netdev; 2628 struct fc_lport *vn_port; 2629 int rc; 2630 char buf[32]; 2631 2632 rc = fcoe_validate_vport_create(vport); 2633 if (rc) { 2634 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf)); 2635 printk(KERN_ERR "fcoe: Failed to create vport, " 2636 "WWPN (0x%s) already exists\n", 2637 buf); 2638 return rc; 2639 } 2640 2641 mutex_lock(&fcoe_config_mutex); 2642 rtnl_lock(); 2643 vn_port = fcoe_if_create(fcoe, &vport->dev, 1); 2644 rtnl_unlock(); 2645 mutex_unlock(&fcoe_config_mutex); 2646 2647 if (IS_ERR(vn_port)) { 2648 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", 2649 netdev->name); 2650 return -EIO; 2651 } 2652 2653 if (disabled) { 2654 fc_vport_set_state(vport, FC_VPORT_DISABLED); 2655 } else { 2656 vn_port->boot_time = jiffies; 2657 fc_fabric_login(vn_port); 2658 fc_vport_setlink(vn_port); 2659 } 2660 return 0; 2661 } 2662 2663 /** 2664 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport 2665 * @vport: fc_vport object that is being destroyed 2666 * 2667 * Returns: 0 for success 2668 */ 2669 static int fcoe_vport_destroy(struct fc_vport *vport) 2670 { 2671 struct Scsi_Host *shost = vport_to_shost(vport); 2672 struct fc_lport *n_port = shost_priv(shost); 2673 struct fc_lport *vn_port = vport->dd_data; 2674 2675 mutex_lock(&n_port->lp_mutex); 2676 list_del(&vn_port->list); 2677 mutex_unlock(&n_port->lp_mutex); 2678 2679 mutex_lock(&fcoe_config_mutex); 2680 fcoe_if_destroy(vn_port); 2681 mutex_unlock(&fcoe_config_mutex); 2682 2683 return 0; 2684 } 2685 2686 /** 2687 * fcoe_vport_disable() - change vport state 2688 * @vport: vport to bring online/offline 2689 * @disable: should the vport be disabled? 2690 */ 2691 static int fcoe_vport_disable(struct fc_vport *vport, bool disable) 2692 { 2693 struct fc_lport *lport = vport->dd_data; 2694 2695 if (disable) { 2696 fc_vport_set_state(vport, FC_VPORT_DISABLED); 2697 fc_fabric_logoff(lport); 2698 } else { 2699 lport->boot_time = jiffies; 2700 fc_fabric_login(lport); 2701 fc_vport_setlink(lport); 2702 } 2703 2704 return 0; 2705 } 2706 2707 /** 2708 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name 2709 * @vport: fc_vport with a new symbolic name string 2710 * 2711 * After generating a new symbolic name string, a new RSPN_ID request is 2712 * sent to the name server. There is no response handler, so if it fails 2713 * for some reason it will not be retried. 2714 */ 2715 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) 2716 { 2717 struct fc_lport *lport = vport->dd_data; 2718 struct fc_frame *fp; 2719 size_t len; 2720 2721 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, 2722 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, 2723 fcoe_netdev(lport)->name, vport->symbolic_name); 2724 2725 if (lport->state != LPORT_ST_READY) 2726 return; 2727 2728 len = strnlen(fc_host_symbolic_name(lport->host), 255); 2729 fp = fc_frame_alloc(lport, 2730 sizeof(struct fc_ct_hdr) + 2731 sizeof(struct fc_ns_rspn) + len); 2732 if (!fp) 2733 return; 2734 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, 2735 NULL, NULL, 3 * lport->r_a_tov); 2736 } 2737 2738 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev) 2739 { 2740 struct fcoe_ctlr_device *ctlr_dev = 2741 fcoe_fcf_dev_to_ctlr_dev(fcf_dev); 2742 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); 2743 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr); 2744 2745 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev); 2746 } 2747 2748 /** 2749 * fcoe_set_port_id() - Callback from libfc when Port_ID is set. 2750 * @lport: the local port 2751 * @port_id: the port ID 2752 * @fp: the received frame, if any, that caused the port_id to be set. 2753 * 2754 * This routine handles the case where we received a FLOGI and are 2755 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi() 2756 * so it can set the non-mapped mode and gateway address. 2757 * 2758 * The FLOGI LS_ACC is handled by fcoe_flogi_resp(). 2759 */ 2760 static void fcoe_set_port_id(struct fc_lport *lport, 2761 u32 port_id, struct fc_frame *fp) 2762 { 2763 struct fcoe_port *port = lport_priv(lport); 2764 struct fcoe_interface *fcoe = port->priv; 2765 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 2766 2767 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI) 2768 fcoe_ctlr_recv_flogi(ctlr, lport, fp); 2769 } 2770