Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright(c) 2007 - 2008 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/pci.h> |
| 21 | #include <scsi/libfcoe.h> |
| 22 | #include <scsi/fc_transport_fcoe.h> |
| 23 | |
| 24 | /* internal fcoe transport */ |
| 25 | struct fcoe_transport_internal { |
| 26 | struct fcoe_transport *t; |
| 27 | struct net_device *netdev; |
| 28 | struct list_head list; |
| 29 | }; |
| 30 | |
| 31 | /* fcoe transports list and its lock */ |
| 32 | static LIST_HEAD(fcoe_transports); |
| 33 | static DEFINE_MUTEX(fcoe_transports_lock); |
| 34 | |
| 35 | /** |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 36 | * fcoe_transport_default() - Returns ptr to the default transport fcoe_sw |
| 37 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 38 | struct fcoe_transport *fcoe_transport_default(void) |
| 39 | { |
| 40 | return &fcoe_sw_transport; |
| 41 | } |
| 42 | |
| 43 | /** |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 44 | * fcoe_transport_to_pcidev() - get the pci dev from a netdev |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 45 | * @netdev: the netdev that pci dev will be retrived from |
| 46 | * |
| 47 | * Returns: NULL or the corrsponding pci_dev |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 48 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 49 | struct pci_dev *fcoe_transport_pcidev(const struct net_device *netdev) |
| 50 | { |
| 51 | if (!netdev->dev.parent) |
| 52 | return NULL; |
| 53 | return to_pci_dev(netdev->dev.parent); |
| 54 | } |
| 55 | |
| 56 | /** |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 57 | * fcoe_transport_device_lookup() - Lookup a transport |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 58 | * @netdev: the netdev the transport to be attached to |
| 59 | * |
| 60 | * This will look for existing offload driver, if not found, it falls back to |
| 61 | * the default sw hba (fcoe_sw) as its fcoe transport. |
| 62 | * |
| 63 | * Returns: 0 for success |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 64 | */ |
Robert Love | b2ab99c | 2009-02-27 10:55:50 -0800 | [diff] [blame] | 65 | static struct fcoe_transport_internal * |
| 66 | fcoe_transport_device_lookup(struct fcoe_transport *t, |
| 67 | struct net_device *netdev) |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 68 | { |
| 69 | struct fcoe_transport_internal *ti; |
| 70 | |
| 71 | /* assign the transpor to this device */ |
| 72 | mutex_lock(&t->devlock); |
| 73 | list_for_each_entry(ti, &t->devlist, list) { |
| 74 | if (ti->netdev == netdev) { |
| 75 | mutex_unlock(&t->devlock); |
| 76 | return ti; |
| 77 | } |
| 78 | } |
| 79 | mutex_unlock(&t->devlock); |
| 80 | return NULL; |
| 81 | } |
| 82 | /** |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 83 | * fcoe_transport_device_add() - Assign a transport to a device |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 84 | * @netdev: the netdev the transport to be attached to |
| 85 | * |
| 86 | * This will look for existing offload driver, if not found, it falls back to |
| 87 | * the default sw hba (fcoe_sw) as its fcoe transport. |
| 88 | * |
| 89 | * Returns: 0 for success |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 90 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 91 | static int fcoe_transport_device_add(struct fcoe_transport *t, |
| 92 | struct net_device *netdev) |
| 93 | { |
| 94 | struct fcoe_transport_internal *ti; |
| 95 | |
| 96 | ti = fcoe_transport_device_lookup(t, netdev); |
| 97 | if (ti) { |
| 98 | printk(KERN_DEBUG "fcoe_transport_device_add:" |
| 99 | "device %s is already added to transport %s\n", |
| 100 | netdev->name, t->name); |
| 101 | return -EEXIST; |
| 102 | } |
| 103 | /* allocate an internal struct to host the netdev and the list */ |
| 104 | ti = kzalloc(sizeof(*ti), GFP_KERNEL); |
| 105 | if (!ti) |
| 106 | return -ENOMEM; |
| 107 | |
| 108 | ti->t = t; |
| 109 | ti->netdev = netdev; |
| 110 | INIT_LIST_HEAD(&ti->list); |
| 111 | dev_hold(ti->netdev); |
| 112 | |
| 113 | mutex_lock(&t->devlock); |
| 114 | list_add(&ti->list, &t->devlist); |
| 115 | mutex_unlock(&t->devlock); |
| 116 | |
| 117 | printk(KERN_DEBUG "fcoe_transport_device_add:" |
| 118 | "device %s added to transport %s\n", |
| 119 | netdev->name, t->name); |
| 120 | |
| 121 | return 0; |
| 122 | } |
| 123 | |
| 124 | /** |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 125 | * fcoe_transport_device_remove() - Remove a device from its transport |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 126 | * @netdev: the netdev the transport to be attached to |
| 127 | * |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 128 | * This removes the device from the transport so the given transport will |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 129 | * not manage this device any more |
| 130 | * |
| 131 | * Returns: 0 for success |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 132 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 133 | static int fcoe_transport_device_remove(struct fcoe_transport *t, |
| 134 | struct net_device *netdev) |
| 135 | { |
| 136 | struct fcoe_transport_internal *ti; |
| 137 | |
| 138 | ti = fcoe_transport_device_lookup(t, netdev); |
| 139 | if (!ti) { |
| 140 | printk(KERN_DEBUG "fcoe_transport_device_remove:" |
| 141 | "device %s is not managed by transport %s\n", |
| 142 | netdev->name, t->name); |
| 143 | return -ENODEV; |
| 144 | } |
| 145 | mutex_lock(&t->devlock); |
| 146 | list_del(&ti->list); |
| 147 | mutex_unlock(&t->devlock); |
| 148 | printk(KERN_DEBUG "fcoe_transport_device_remove:" |
| 149 | "device %s removed from transport %s\n", |
| 150 | netdev->name, t->name); |
| 151 | dev_put(ti->netdev); |
| 152 | kfree(ti); |
| 153 | return 0; |
| 154 | } |
| 155 | |
| 156 | /** |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 157 | * fcoe_transport_device_remove_all() - Remove all from transport devlist |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 158 | * |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 159 | * This removes the device from the transport so the given transport will |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 160 | * not manage this device any more |
| 161 | * |
| 162 | * Returns: 0 for success |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 163 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 164 | static void fcoe_transport_device_remove_all(struct fcoe_transport *t) |
| 165 | { |
| 166 | struct fcoe_transport_internal *ti, *tmp; |
| 167 | |
| 168 | mutex_lock(&t->devlock); |
| 169 | list_for_each_entry_safe(ti, tmp, &t->devlist, list) { |
| 170 | list_del(&ti->list); |
| 171 | kfree(ti); |
| 172 | } |
| 173 | mutex_unlock(&t->devlock); |
| 174 | } |
| 175 | |
| 176 | /** |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 177 | * fcoe_transport_match() - Use the bus device match function to match the hw |
| 178 | * @t: The fcoe transport to check |
| 179 | * @netdev: The netdev to match against |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 180 | * |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 181 | * This function is used to check if the given transport wants to manage the |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 182 | * input netdev. if the transports implements the match function, it will be |
| 183 | * called, o.w. we just compare the pci vendor and device id. |
| 184 | * |
| 185 | * Returns: true for match up |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 186 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 187 | static bool fcoe_transport_match(struct fcoe_transport *t, |
Robert Love | b2ab99c | 2009-02-27 10:55:50 -0800 | [diff] [blame] | 188 | struct net_device *netdev) |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 189 | { |
| 190 | /* match transport by vendor and device id */ |
| 191 | struct pci_dev *pci; |
| 192 | |
| 193 | pci = fcoe_transport_pcidev(netdev); |
| 194 | |
| 195 | if (pci) { |
| 196 | printk(KERN_DEBUG "fcoe_transport_match:" |
| 197 | "%s:%x:%x -- %s:%x:%x\n", |
| 198 | t->name, t->vendor, t->device, |
| 199 | netdev->name, pci->vendor, pci->device); |
| 200 | |
| 201 | /* if transport supports match */ |
| 202 | if (t->match) |
| 203 | return t->match(netdev); |
| 204 | |
| 205 | /* else just compare the vendor and device id: pci only */ |
| 206 | return (t->vendor == pci->vendor) && (t->device == pci->device); |
| 207 | } |
| 208 | return false; |
| 209 | } |
| 210 | |
| 211 | /** |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 212 | * fcoe_transport_lookup() - Check if the transport is already registered |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 213 | * @t: the transport to be looked up |
| 214 | * |
| 215 | * This compares the parent device (pci) vendor and device id |
| 216 | * |
| 217 | * Returns: NULL if not found |
| 218 | * |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 219 | * TODO: return default sw transport if no other transport is found |
| 220 | */ |
Robert Love | b2ab99c | 2009-02-27 10:55:50 -0800 | [diff] [blame] | 221 | static struct fcoe_transport * |
| 222 | fcoe_transport_lookup(struct net_device *netdev) |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 223 | { |
| 224 | struct fcoe_transport *t; |
| 225 | |
| 226 | mutex_lock(&fcoe_transports_lock); |
| 227 | list_for_each_entry(t, &fcoe_transports, list) { |
| 228 | if (fcoe_transport_match(t, netdev)) { |
| 229 | mutex_unlock(&fcoe_transports_lock); |
| 230 | return t; |
| 231 | } |
| 232 | } |
| 233 | mutex_unlock(&fcoe_transports_lock); |
| 234 | |
| 235 | printk(KERN_DEBUG "fcoe_transport_lookup:" |
| 236 | "use default transport for %s\n", netdev->name); |
| 237 | return fcoe_transport_default(); |
| 238 | } |
| 239 | |
| 240 | /** |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 241 | * fcoe_transport_register() - Adds a fcoe transport to the fcoe transports list |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 242 | * @t: ptr to the fcoe transport to be added |
| 243 | * |
| 244 | * Returns: 0 for success |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 245 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 246 | int fcoe_transport_register(struct fcoe_transport *t) |
| 247 | { |
| 248 | struct fcoe_transport *tt; |
| 249 | |
| 250 | /* TODO - add fcoe_transport specific initialization here */ |
| 251 | mutex_lock(&fcoe_transports_lock); |
| 252 | list_for_each_entry(tt, &fcoe_transports, list) { |
| 253 | if (tt == t) { |
| 254 | mutex_unlock(&fcoe_transports_lock); |
| 255 | return -EEXIST; |
| 256 | } |
| 257 | } |
| 258 | list_add_tail(&t->list, &fcoe_transports); |
| 259 | mutex_unlock(&fcoe_transports_lock); |
| 260 | |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 261 | printk(KERN_DEBUG "fcoe_transport_register:%s\n", t->name); |
| 262 | |
| 263 | return 0; |
| 264 | } |
| 265 | EXPORT_SYMBOL_GPL(fcoe_transport_register); |
| 266 | |
| 267 | /** |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 268 | * fcoe_transport_unregister() - Remove the tranport fro the fcoe transports list |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 269 | * @t: ptr to the fcoe transport to be removed |
| 270 | * |
| 271 | * Returns: 0 for success |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 272 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 273 | int fcoe_transport_unregister(struct fcoe_transport *t) |
| 274 | { |
| 275 | struct fcoe_transport *tt, *tmp; |
| 276 | |
| 277 | mutex_lock(&fcoe_transports_lock); |
| 278 | list_for_each_entry_safe(tt, tmp, &fcoe_transports, list) { |
| 279 | if (tt == t) { |
| 280 | list_del(&t->list); |
| 281 | mutex_unlock(&fcoe_transports_lock); |
| 282 | fcoe_transport_device_remove_all(t); |
| 283 | printk(KERN_DEBUG "fcoe_transport_unregister:%s\n", |
| 284 | t->name); |
| 285 | return 0; |
| 286 | } |
| 287 | } |
| 288 | mutex_unlock(&fcoe_transports_lock); |
| 289 | return -ENODEV; |
| 290 | } |
| 291 | EXPORT_SYMBOL_GPL(fcoe_transport_unregister); |
| 292 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 293 | /** |
| 294 | * fcoe_load_transport_driver() - Load an offload driver by alias name |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 295 | * @netdev: the target net device |
| 296 | * |
| 297 | * Requests for an offload driver module as the fcoe transport, if fails, it |
| 298 | * falls back to use the SW HBA (fcoe_sw) as its transport |
| 299 | * |
| 300 | * TODO - |
| 301 | * 1. supports only PCI device |
| 302 | * 2. needs fix for VLAn and bonding |
| 303 | * 3. pure hw fcoe hba may not have netdev |
| 304 | * |
| 305 | * Returns: 0 for success |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 306 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 307 | int fcoe_load_transport_driver(struct net_device *netdev) |
| 308 | { |
| 309 | struct pci_dev *pci; |
| 310 | struct device *dev = netdev->dev.parent; |
| 311 | |
| 312 | if (fcoe_transport_lookup(netdev)) { |
| 313 | /* load default transport */ |
| 314 | printk(KERN_DEBUG "fcoe: already loaded transport for %s\n", |
| 315 | netdev->name); |
| 316 | return -EEXIST; |
| 317 | } |
| 318 | |
| 319 | pci = to_pci_dev(dev); |
| 320 | if (dev->bus != &pci_bus_type) { |
| 321 | printk(KERN_DEBUG "fcoe: support noly PCI device\n"); |
| 322 | return -ENODEV; |
| 323 | } |
| 324 | printk(KERN_DEBUG "fcoe: loading driver fcoe-pci-0x%04x-0x%04x\n", |
| 325 | pci->vendor, pci->device); |
| 326 | |
| 327 | return request_module("fcoe-pci-0x%04x-0x%04x", |
| 328 | pci->vendor, pci->device); |
| 329 | |
| 330 | } |
| 331 | EXPORT_SYMBOL_GPL(fcoe_load_transport_driver); |
| 332 | |
| 333 | /** |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 334 | * fcoe_transport_attach() - Load transport to fcoe |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 335 | * @netdev: the netdev the transport to be attached to |
| 336 | * |
| 337 | * This will look for existing offload driver, if not found, it falls back to |
| 338 | * the default sw hba (fcoe_sw) as its fcoe transport. |
| 339 | * |
| 340 | * Returns: 0 for success |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 341 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 342 | int fcoe_transport_attach(struct net_device *netdev) |
| 343 | { |
| 344 | struct fcoe_transport *t; |
| 345 | |
| 346 | /* find the corresponding transport */ |
| 347 | t = fcoe_transport_lookup(netdev); |
| 348 | if (!t) { |
| 349 | printk(KERN_DEBUG "fcoe_transport_attach" |
| 350 | ":no transport for %s:use %s\n", |
| 351 | netdev->name, t->name); |
| 352 | return -ENODEV; |
| 353 | } |
| 354 | /* add to the transport */ |
| 355 | if (fcoe_transport_device_add(t, netdev)) { |
| 356 | printk(KERN_DEBUG "fcoe_transport_attach" |
| 357 | ":failed to add %s to tramsport %s\n", |
| 358 | netdev->name, t->name); |
| 359 | return -EIO; |
| 360 | } |
| 361 | /* transport create function */ |
| 362 | if (t->create) |
| 363 | t->create(netdev); |
| 364 | |
| 365 | printk(KERN_DEBUG "fcoe_transport_attach:transport %s for %s\n", |
| 366 | t->name, netdev->name); |
| 367 | return 0; |
| 368 | } |
| 369 | EXPORT_SYMBOL_GPL(fcoe_transport_attach); |
| 370 | |
| 371 | /** |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 372 | * fcoe_transport_release() - Unload transport from fcoe |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 373 | * @netdev: the net device on which fcoe is to be released |
| 374 | * |
| 375 | * Returns: 0 for success |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 376 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 377 | int fcoe_transport_release(struct net_device *netdev) |
| 378 | { |
| 379 | struct fcoe_transport *t; |
| 380 | |
| 381 | /* find the corresponding transport */ |
| 382 | t = fcoe_transport_lookup(netdev); |
| 383 | if (!t) { |
| 384 | printk(KERN_DEBUG "fcoe_transport_release:" |
| 385 | "no transport for %s:use %s\n", |
| 386 | netdev->name, t->name); |
| 387 | return -ENODEV; |
| 388 | } |
| 389 | /* remove the device from the transport */ |
| 390 | if (fcoe_transport_device_remove(t, netdev)) { |
| 391 | printk(KERN_DEBUG "fcoe_transport_release:" |
| 392 | "failed to add %s to tramsport %s\n", |
| 393 | netdev->name, t->name); |
| 394 | return -EIO; |
| 395 | } |
| 396 | /* transport destroy function */ |
| 397 | if (t->destroy) |
| 398 | t->destroy(netdev); |
| 399 | |
| 400 | printk(KERN_DEBUG "fcoe_transport_release:" |
| 401 | "device %s dettached from transport %s\n", |
| 402 | netdev->name, t->name); |
| 403 | |
| 404 | return 0; |
| 405 | } |
| 406 | EXPORT_SYMBOL_GPL(fcoe_transport_release); |
| 407 | |
| 408 | /** |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 409 | * fcoe_transport_init() - Initializes fcoe transport layer |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 410 | * |
| 411 | * This prepares for the fcoe transport layer |
| 412 | * |
| 413 | * Returns: none |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 414 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 415 | int __init fcoe_transport_init(void) |
| 416 | { |
| 417 | INIT_LIST_HEAD(&fcoe_transports); |
| 418 | mutex_init(&fcoe_transports_lock); |
| 419 | return 0; |
| 420 | } |
| 421 | |
| 422 | /** |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 423 | * fcoe_transport_exit() - Cleans up the fcoe transport layer |
| 424 | * |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 425 | * This cleans up the fcoe transport layer. removing any transport on the list, |
| 426 | * note that the transport destroy func is not called here. |
| 427 | * |
| 428 | * Returns: none |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 429 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 430 | int __exit fcoe_transport_exit(void) |
| 431 | { |
| 432 | struct fcoe_transport *t, *tmp; |
| 433 | |
| 434 | mutex_lock(&fcoe_transports_lock); |
| 435 | list_for_each_entry_safe(t, tmp, &fcoe_transports, list) { |
| 436 | list_del(&t->list); |
| 437 | mutex_unlock(&fcoe_transports_lock); |
| 438 | fcoe_transport_device_remove_all(t); |
| 439 | mutex_lock(&fcoe_transports_lock); |
| 440 | } |
| 441 | mutex_unlock(&fcoe_transports_lock); |
| 442 | return 0; |
| 443 | } |