Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1 | /* |
Chris Leech | af7f85d | 2009-08-25 13:59:24 -0700 | [diff] [blame] | 2 | * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved. |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 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/version.h> |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 22 | #include <linux/spinlock.h> |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 23 | #include <linux/netdevice.h> |
| 24 | #include <linux/etherdevice.h> |
| 25 | #include <linux/ethtool.h> |
| 26 | #include <linux/if_ether.h> |
| 27 | #include <linux/if_vlan.h> |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 28 | #include <linux/crc32.h> |
| 29 | #include <linux/cpu.h> |
| 30 | #include <linux/fs.h> |
| 31 | #include <linux/sysfs.h> |
| 32 | #include <linux/ctype.h> |
| 33 | #include <scsi/scsi_tcq.h> |
| 34 | #include <scsi/scsicam.h> |
| 35 | #include <scsi/scsi_transport.h> |
| 36 | #include <scsi/scsi_transport_fc.h> |
| 37 | #include <net/rtnetlink.h> |
| 38 | |
| 39 | #include <scsi/fc/fc_encaps.h> |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 40 | #include <scsi/fc/fc_fip.h> |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 41 | |
| 42 | #include <scsi/libfc.h> |
| 43 | #include <scsi/fc_frame.h> |
| 44 | #include <scsi/libfcoe.h> |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 45 | |
Vasu Dev | fdd7802 | 2009-03-17 11:42:24 -0700 | [diff] [blame] | 46 | #include "fcoe.h" |
| 47 | |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 48 | MODULE_AUTHOR("Open-FCoE.org"); |
| 49 | MODULE_DESCRIPTION("FCoE"); |
Vasu Dev | 9b34ecf | 2009-03-17 11:42:13 -0700 | [diff] [blame] | 50 | MODULE_LICENSE("GPL v2"); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 51 | |
Yi Zou | 05cc739 | 2009-08-25 13:59:03 -0700 | [diff] [blame] | 52 | /* Performance tuning parameters for fcoe */ |
| 53 | static unsigned int fcoe_ddp_min; |
| 54 | module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); |
| 55 | MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ |
| 56 | "Direct Data Placement (DDP)."); |
| 57 | |
Chris Leech | dfc1d0f | 2009-08-25 14:00:13 -0700 | [diff] [blame] | 58 | DEFINE_MUTEX(fcoe_config_mutex); |
| 59 | |
Joe Eykholt | e7a5199 | 2009-08-25 14:04:08 -0700 | [diff] [blame] | 60 | /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */ |
| 61 | static DECLARE_COMPLETION(fcoe_flush_completion); |
| 62 | |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 63 | /* fcoe host list */ |
Chris Leech | 090eb6c | 2009-08-25 14:00:28 -0700 | [diff] [blame] | 64 | /* must only by accessed under the RTNL mutex */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 65 | LIST_HEAD(fcoe_hostlist); |
Robert Love | 5e5e92d | 2009-03-17 11:41:35 -0700 | [diff] [blame] | 66 | DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 67 | |
Chris Leech | dd3fd72 | 2009-04-21 16:27:36 -0700 | [diff] [blame] | 68 | /* Function Prototypes */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 69 | static int fcoe_reset(struct Scsi_Host *); |
Vasu Dev | fdd7802 | 2009-03-17 11:42:24 -0700 | [diff] [blame] | 70 | static int fcoe_xmit(struct fc_lport *, struct fc_frame *); |
| 71 | static int fcoe_rcv(struct sk_buff *, struct net_device *, |
| 72 | struct packet_type *, struct net_device *); |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 73 | static int fcoe_percpu_receive_thread(void *); |
| 74 | static void fcoe_clean_pending_queue(struct fc_lport *); |
| 75 | static void fcoe_percpu_clean(struct fc_lport *); |
| 76 | static int fcoe_link_ok(struct fc_lport *); |
Vasu Dev | fdd7802 | 2009-03-17 11:42:24 -0700 | [diff] [blame] | 77 | |
| 78 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); |
| 79 | static int fcoe_hostlist_add(const struct fc_lport *); |
Vasu Dev | fdd7802 | 2009-03-17 11:42:24 -0700 | [diff] [blame] | 80 | |
Vasu Dev | 4bb6b51 | 2009-05-06 10:52:34 -0700 | [diff] [blame] | 81 | static void fcoe_check_wait_queue(struct fc_lport *, struct sk_buff *); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 82 | static int fcoe_device_notification(struct notifier_block *, ulong, void *); |
| 83 | static void fcoe_dev_setup(void); |
| 84 | static void fcoe_dev_cleanup(void); |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 85 | static struct fcoe_interface |
| 86 | *fcoe_hostlist_lookup_port(const struct net_device *); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 87 | |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 88 | static int fcoe_fip_recv(struct sk_buff *, struct net_device *, |
| 89 | struct packet_type *, struct net_device *); |
| 90 | |
| 91 | static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); |
| 92 | static void fcoe_update_src_mac(struct fc_lport *, u8 *); |
| 93 | static u8 *fcoe_get_src_mac(struct fc_lport *); |
| 94 | static void fcoe_destroy_work(struct work_struct *); |
| 95 | |
| 96 | static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, |
| 97 | unsigned int); |
| 98 | static int fcoe_ddp_done(struct fc_lport *, u16); |
| 99 | |
| 100 | static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *); |
| 101 | |
| 102 | static int fcoe_create(const char *, struct kernel_param *); |
| 103 | static int fcoe_destroy(const char *, struct kernel_param *); |
| 104 | |
| 105 | static u8 *fcoe_get_src_mac(struct fc_lport *); |
| 106 | static void fcoe_destroy_work(struct work_struct *); |
| 107 | |
| 108 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *, |
| 109 | u32 did, struct fc_frame *, |
| 110 | unsigned int op, |
| 111 | void (*resp)(struct fc_seq *, |
| 112 | struct fc_frame *, |
| 113 | void *), |
| 114 | void *, u32 timeout); |
| 115 | |
| 116 | module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR); |
| 117 | __MODULE_PARM_TYPE(create, "string"); |
| 118 | MODULE_PARM_DESC(create, "Create fcoe fcoe using net device passed in."); |
| 119 | module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR); |
| 120 | __MODULE_PARM_TYPE(destroy, "string"); |
| 121 | MODULE_PARM_DESC(destroy, "Destroy fcoe fcoe"); |
| 122 | |
| 123 | /* notification function for packets from net device */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 124 | static struct notifier_block fcoe_notifier = { |
| 125 | .notifier_call = fcoe_device_notification, |
| 126 | }; |
| 127 | |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 128 | /* notification function for CPU hotplug events */ |
| 129 | static struct notifier_block fcoe_cpu_notifier = { |
| 130 | .notifier_call = fcoe_cpu_callback, |
| 131 | }; |
| 132 | |
Chris Leech | e9084bb | 2009-11-03 11:46:34 -0800 | [diff] [blame] | 133 | static struct scsi_transport_template *fcoe_transport_template; |
| 134 | static struct scsi_transport_template *fcoe_vport_transport_template; |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 135 | |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 136 | static int fcoe_vport_destroy(struct fc_vport *); |
| 137 | static int fcoe_vport_create(struct fc_vport *, bool disabled); |
| 138 | static int fcoe_vport_disable(struct fc_vport *, bool disable); |
| 139 | static void fcoe_set_vport_symbolic_name(struct fc_vport *); |
| 140 | |
| 141 | static struct libfc_function_template fcoe_libfc_fcn_templ = { |
| 142 | .frame_send = fcoe_xmit, |
| 143 | .ddp_setup = fcoe_ddp_setup, |
| 144 | .ddp_done = fcoe_ddp_done, |
| 145 | .elsct_send = fcoe_elsct_send, |
| 146 | }; |
Chris Leech | 9a05753 | 2009-11-03 11:46:40 -0800 | [diff] [blame] | 147 | |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 148 | struct fc_function_template fcoe_transport_function = { |
| 149 | .show_host_node_name = 1, |
| 150 | .show_host_port_name = 1, |
| 151 | .show_host_supported_classes = 1, |
| 152 | .show_host_supported_fc4s = 1, |
| 153 | .show_host_active_fc4s = 1, |
| 154 | .show_host_maxframe_size = 1, |
| 155 | |
| 156 | .show_host_port_id = 1, |
| 157 | .show_host_supported_speeds = 1, |
| 158 | .get_host_speed = fc_get_host_speed, |
| 159 | .show_host_speed = 1, |
| 160 | .show_host_port_type = 1, |
| 161 | .get_host_port_state = fc_get_host_port_state, |
| 162 | .show_host_port_state = 1, |
| 163 | .show_host_symbolic_name = 1, |
| 164 | |
| 165 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), |
| 166 | .show_rport_maxframe_size = 1, |
| 167 | .show_rport_supported_classes = 1, |
| 168 | |
| 169 | .show_host_fabric_name = 1, |
| 170 | .show_starget_node_name = 1, |
| 171 | .show_starget_port_name = 1, |
| 172 | .show_starget_port_id = 1, |
| 173 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, |
| 174 | .show_rport_dev_loss_tmo = 1, |
| 175 | .get_fc_host_stats = fc_get_host_stats, |
| 176 | .issue_fc_host_lip = fcoe_reset, |
| 177 | |
| 178 | .terminate_rport_io = fc_rport_terminate_io, |
Chris Leech | 9a05753 | 2009-11-03 11:46:40 -0800 | [diff] [blame] | 179 | |
| 180 | .vport_create = fcoe_vport_create, |
| 181 | .vport_delete = fcoe_vport_destroy, |
| 182 | .vport_disable = fcoe_vport_disable, |
Chris Leech | dc8596d | 2009-11-03 11:47:18 -0800 | [diff] [blame] | 183 | .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, |
Steve Ma | a51ab39 | 2009-11-03 11:47:34 -0800 | [diff] [blame] | 184 | |
| 185 | .bsg_request = fc_lport_bsg_request, |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 186 | }; |
| 187 | |
Chris Leech | e9084bb | 2009-11-03 11:46:34 -0800 | [diff] [blame] | 188 | struct fc_function_template fcoe_vport_transport_function = { |
| 189 | .show_host_node_name = 1, |
| 190 | .show_host_port_name = 1, |
| 191 | .show_host_supported_classes = 1, |
| 192 | .show_host_supported_fc4s = 1, |
| 193 | .show_host_active_fc4s = 1, |
| 194 | .show_host_maxframe_size = 1, |
| 195 | |
| 196 | .show_host_port_id = 1, |
| 197 | .show_host_supported_speeds = 1, |
| 198 | .get_host_speed = fc_get_host_speed, |
| 199 | .show_host_speed = 1, |
| 200 | .show_host_port_type = 1, |
| 201 | .get_host_port_state = fc_get_host_port_state, |
| 202 | .show_host_port_state = 1, |
| 203 | .show_host_symbolic_name = 1, |
| 204 | |
| 205 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), |
| 206 | .show_rport_maxframe_size = 1, |
| 207 | .show_rport_supported_classes = 1, |
| 208 | |
| 209 | .show_host_fabric_name = 1, |
| 210 | .show_starget_node_name = 1, |
| 211 | .show_starget_port_name = 1, |
| 212 | .show_starget_port_id = 1, |
| 213 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, |
| 214 | .show_rport_dev_loss_tmo = 1, |
| 215 | .get_fc_host_stats = fc_get_host_stats, |
| 216 | .issue_fc_host_lip = fcoe_reset, |
| 217 | |
| 218 | .terminate_rport_io = fc_rport_terminate_io, |
Steve Ma | a51ab39 | 2009-11-03 11:47:34 -0800 | [diff] [blame] | 219 | |
| 220 | .bsg_request = fc_lport_bsg_request, |
Chris Leech | e9084bb | 2009-11-03 11:46:34 -0800 | [diff] [blame] | 221 | }; |
| 222 | |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 223 | static struct scsi_host_template fcoe_shost_template = { |
| 224 | .module = THIS_MODULE, |
| 225 | .name = "FCoE Driver", |
| 226 | .proc_name = FCOE_NAME, |
| 227 | .queuecommand = fc_queuecommand, |
| 228 | .eh_abort_handler = fc_eh_abort, |
| 229 | .eh_device_reset_handler = fc_eh_device_reset, |
| 230 | .eh_host_reset_handler = fc_eh_host_reset, |
| 231 | .slave_alloc = fc_slave_alloc, |
| 232 | .change_queue_depth = fc_change_queue_depth, |
| 233 | .change_queue_type = fc_change_queue_type, |
| 234 | .this_id = -1, |
Vasu Dev | 14caf44 | 2009-10-15 17:46:55 -0700 | [diff] [blame] | 235 | .cmd_per_lun = 3, |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 236 | .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, |
| 237 | .use_clustering = ENABLE_CLUSTERING, |
| 238 | .sg_tablesize = SG_ALL, |
| 239 | .max_sectors = 0xffff, |
| 240 | }; |
| 241 | |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 242 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 243 | * fcoe_interface_setup() - Setup a FCoE interface |
| 244 | * @fcoe: The new FCoE interface |
| 245 | * @netdev: The net device that the fcoe interface is on |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 246 | * |
| 247 | * Returns : 0 for success |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 248 | * Locking: must be called with the RTNL mutex held |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 249 | */ |
| 250 | static int fcoe_interface_setup(struct fcoe_interface *fcoe, |
| 251 | struct net_device *netdev) |
| 252 | { |
| 253 | struct fcoe_ctlr *fip = &fcoe->ctlr; |
| 254 | struct netdev_hw_addr *ha; |
| 255 | u8 flogi_maddr[ETH_ALEN]; |
Yi Zou | b7a727f | 2009-10-21 16:28:03 -0700 | [diff] [blame] | 256 | const struct net_device_ops *ops; |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 257 | |
| 258 | fcoe->netdev = netdev; |
| 259 | |
Yi Zou | b7a727f | 2009-10-21 16:28:03 -0700 | [diff] [blame] | 260 | /* Let LLD initialize for FCoE */ |
| 261 | ops = netdev->netdev_ops; |
| 262 | if (ops->ndo_fcoe_enable) { |
| 263 | if (ops->ndo_fcoe_enable(netdev)) |
| 264 | FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" |
| 265 | " specific feature for LLD.\n"); |
| 266 | } |
| 267 | |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 268 | /* Do not support for bonding device */ |
| 269 | if ((netdev->priv_flags & IFF_MASTER_ALB) || |
| 270 | (netdev->priv_flags & IFF_SLAVE_INACTIVE) || |
| 271 | (netdev->priv_flags & IFF_MASTER_8023AD)) { |
| 272 | return -EOPNOTSUPP; |
| 273 | } |
| 274 | |
| 275 | /* look for SAN MAC address, if multiple SAN MACs exist, only |
| 276 | * use the first one for SPMA */ |
| 277 | rcu_read_lock(); |
| 278 | for_each_dev_addr(netdev, ha) { |
| 279 | if ((ha->type == NETDEV_HW_ADDR_T_SAN) && |
| 280 | (is_valid_ether_addr(fip->ctl_src_addr))) { |
| 281 | memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); |
| 282 | fip->spma = 1; |
| 283 | break; |
| 284 | } |
| 285 | } |
| 286 | rcu_read_unlock(); |
| 287 | |
| 288 | /* setup Source Mac Address */ |
| 289 | if (!fip->spma) |
| 290 | memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); |
| 291 | |
| 292 | /* |
| 293 | * Add FCoE MAC address as second unicast MAC address |
| 294 | * or enter promiscuous mode if not capable of listening |
| 295 | * for multiple unicast MACs. |
| 296 | */ |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 297 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
| 298 | dev_unicast_add(netdev, flogi_maddr); |
| 299 | if (fip->spma) |
| 300 | dev_unicast_add(netdev, fip->ctl_src_addr); |
| 301 | dev_mc_add(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 302 | |
| 303 | /* |
| 304 | * setup the receive function from ethernet driver |
| 305 | * on the ethertype for the given device |
| 306 | */ |
| 307 | fcoe->fcoe_packet_type.func = fcoe_rcv; |
| 308 | fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE); |
| 309 | fcoe->fcoe_packet_type.dev = netdev; |
| 310 | dev_add_pack(&fcoe->fcoe_packet_type); |
| 311 | |
| 312 | fcoe->fip_packet_type.func = fcoe_fip_recv; |
| 313 | fcoe->fip_packet_type.type = htons(ETH_P_FIP); |
| 314 | fcoe->fip_packet_type.dev = netdev; |
| 315 | dev_add_pack(&fcoe->fip_packet_type); |
| 316 | |
| 317 | return 0; |
| 318 | } |
| 319 | |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 320 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 321 | * fcoe_interface_create() - Create a FCoE interface on a net device |
| 322 | * @netdev: The net device to create the FCoE interface on |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 323 | * |
| 324 | * Returns: pointer to a struct fcoe_interface or NULL on error |
| 325 | */ |
| 326 | static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev) |
| 327 | { |
| 328 | struct fcoe_interface *fcoe; |
| 329 | |
| 330 | fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL); |
| 331 | if (!fcoe) { |
| 332 | FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n"); |
| 333 | return NULL; |
| 334 | } |
| 335 | |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 336 | dev_hold(netdev); |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 337 | kref_init(&fcoe->kref); |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 338 | |
| 339 | /* |
| 340 | * Initialize FIP. |
| 341 | */ |
| 342 | fcoe_ctlr_init(&fcoe->ctlr); |
| 343 | fcoe->ctlr.send = fcoe_fip_send; |
| 344 | fcoe->ctlr.update_mac = fcoe_update_src_mac; |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame] | 345 | fcoe->ctlr.get_src_addr = fcoe_get_src_mac; |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 346 | |
| 347 | fcoe_interface_setup(fcoe, netdev); |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 348 | |
| 349 | return fcoe; |
| 350 | } |
| 351 | |
| 352 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 353 | * fcoe_interface_cleanup() - Clean up a FCoE interface |
| 354 | * @fcoe: The FCoE interface to be cleaned up |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 355 | * |
| 356 | * Caller must be holding the RTNL mutex |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 357 | */ |
| 358 | void fcoe_interface_cleanup(struct fcoe_interface *fcoe) |
| 359 | { |
| 360 | struct net_device *netdev = fcoe->netdev; |
| 361 | struct fcoe_ctlr *fip = &fcoe->ctlr; |
| 362 | u8 flogi_maddr[ETH_ALEN]; |
Yi Zou | b7a727f | 2009-10-21 16:28:03 -0700 | [diff] [blame] | 363 | const struct net_device_ops *ops; |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 364 | |
| 365 | /* |
| 366 | * Don't listen for Ethernet packets anymore. |
| 367 | * synchronize_net() ensures that the packet handlers are not running |
| 368 | * on another CPU. dev_remove_pack() would do that, this calls the |
| 369 | * unsyncronized version __dev_remove_pack() to avoid multiple delays. |
| 370 | */ |
| 371 | __dev_remove_pack(&fcoe->fcoe_packet_type); |
| 372 | __dev_remove_pack(&fcoe->fip_packet_type); |
| 373 | synchronize_net(); |
| 374 | |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 375 | /* Delete secondary MAC addresses */ |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 376 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
| 377 | dev_unicast_delete(netdev, flogi_maddr); |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 378 | if (fip->spma) |
| 379 | dev_unicast_delete(netdev, fip->ctl_src_addr); |
| 380 | dev_mc_delete(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); |
Yi Zou | b7a727f | 2009-10-21 16:28:03 -0700 | [diff] [blame] | 381 | |
| 382 | /* Tell the LLD we are done w/ FCoE */ |
| 383 | ops = netdev->netdev_ops; |
| 384 | if (ops->ndo_fcoe_disable) { |
| 385 | if (ops->ndo_fcoe_disable(netdev)) |
| 386 | FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" |
| 387 | " specific feature for LLD.\n"); |
| 388 | } |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 389 | } |
| 390 | |
| 391 | /** |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 392 | * fcoe_interface_release() - fcoe_port kref release function |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 393 | * @kref: Embedded reference count in an fcoe_interface struct |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 394 | */ |
| 395 | static void fcoe_interface_release(struct kref *kref) |
| 396 | { |
| 397 | struct fcoe_interface *fcoe; |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 398 | struct net_device *netdev; |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 399 | |
| 400 | fcoe = container_of(kref, struct fcoe_interface, kref); |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 401 | netdev = fcoe->netdev; |
| 402 | /* tear-down the FCoE controller */ |
| 403 | fcoe_ctlr_destroy(&fcoe->ctlr); |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 404 | kfree(fcoe); |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 405 | dev_put(netdev); |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 406 | } |
| 407 | |
| 408 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 409 | * fcoe_interface_get() - Get a reference to a FCoE interface |
| 410 | * @fcoe: The FCoE interface to be held |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 411 | */ |
| 412 | static inline void fcoe_interface_get(struct fcoe_interface *fcoe) |
| 413 | { |
| 414 | kref_get(&fcoe->kref); |
| 415 | } |
| 416 | |
| 417 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 418 | * fcoe_interface_put() - Put a reference to a FCoE interface |
| 419 | * @fcoe: The FCoE interface to be released |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 420 | */ |
| 421 | static inline void fcoe_interface_put(struct fcoe_interface *fcoe) |
| 422 | { |
| 423 | kref_put(&fcoe->kref, fcoe_interface_release); |
| 424 | } |
| 425 | |
| 426 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 427 | * fcoe_fip_recv() - Handler for received FIP frames |
| 428 | * @skb: The receive skb |
| 429 | * @netdev: The associated net device |
| 430 | * @ptype: The packet_type structure which was used to register this handler |
| 431 | * @orig_dev: The original net_device the the skb was received on. |
| 432 | * (in case dev is a bond) |
Vasu Dev | ab6b85c | 2009-05-17 12:33:08 +0000 | [diff] [blame] | 433 | * |
| 434 | * Returns: 0 for success |
| 435 | */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 436 | static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, |
Vasu Dev | ab6b85c | 2009-05-17 12:33:08 +0000 | [diff] [blame] | 437 | struct packet_type *ptype, |
| 438 | struct net_device *orig_dev) |
| 439 | { |
Chris Leech | 259ad85 | 2009-08-25 13:59:41 -0700 | [diff] [blame] | 440 | struct fcoe_interface *fcoe; |
Vasu Dev | ab6b85c | 2009-05-17 12:33:08 +0000 | [diff] [blame] | 441 | |
Chris Leech | 259ad85 | 2009-08-25 13:59:41 -0700 | [diff] [blame] | 442 | fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); |
Chris Leech | 3fe9a0b | 2009-08-25 13:59:46 -0700 | [diff] [blame] | 443 | fcoe_ctlr_recv(&fcoe->ctlr, skb); |
Vasu Dev | ab6b85c | 2009-05-17 12:33:08 +0000 | [diff] [blame] | 444 | return 0; |
| 445 | } |
| 446 | |
| 447 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 448 | * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame |
| 449 | * @fip: The FCoE controller |
| 450 | * @skb: The FIP packet to be sent |
Vasu Dev | ab6b85c | 2009-05-17 12:33:08 +0000 | [diff] [blame] | 451 | */ |
| 452 | static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) |
| 453 | { |
Chris Leech | 3fe9a0b | 2009-08-25 13:59:46 -0700 | [diff] [blame] | 454 | skb->dev = fcoe_from_ctlr(fip)->netdev; |
Vasu Dev | ab6b85c | 2009-05-17 12:33:08 +0000 | [diff] [blame] | 455 | dev_queue_xmit(skb); |
| 456 | } |
| 457 | |
| 458 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 459 | * fcoe_update_src_mac() - Update the Ethernet MAC filters |
| 460 | * @lport: The local port to update the source MAC on |
| 461 | * @addr: Unicast MAC address to add |
Vasu Dev | ab6b85c | 2009-05-17 12:33:08 +0000 | [diff] [blame] | 462 | * |
| 463 | * Remove any previously-set unicast MAC filter. |
| 464 | * Add secondary FCoE MAC address filter for our OUI. |
| 465 | */ |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame] | 466 | static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) |
Vasu Dev | ab6b85c | 2009-05-17 12:33:08 +0000 | [diff] [blame] | 467 | { |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame] | 468 | struct fcoe_port *port = lport_priv(lport); |
| 469 | struct fcoe_interface *fcoe = port->fcoe; |
Vasu Dev | ab6b85c | 2009-05-17 12:33:08 +0000 | [diff] [blame] | 470 | |
Vasu Dev | ab6b85c | 2009-05-17 12:33:08 +0000 | [diff] [blame] | 471 | rtnl_lock(); |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame] | 472 | if (!is_zero_ether_addr(port->data_src_addr)) |
| 473 | dev_unicast_delete(fcoe->netdev, port->data_src_addr); |
| 474 | if (!is_zero_ether_addr(addr)) |
| 475 | dev_unicast_add(fcoe->netdev, addr); |
| 476 | memcpy(port->data_src_addr, addr, ETH_ALEN); |
Vasu Dev | ab6b85c | 2009-05-17 12:33:08 +0000 | [diff] [blame] | 477 | rtnl_unlock(); |
| 478 | } |
| 479 | |
| 480 | /** |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame] | 481 | * fcoe_get_src_mac() - return the Ethernet source address for an lport |
| 482 | * @lport: libfc lport |
| 483 | */ |
| 484 | static u8 *fcoe_get_src_mac(struct fc_lport *lport) |
| 485 | { |
| 486 | struct fcoe_port *port = lport_priv(lport); |
| 487 | |
| 488 | return port->data_src_addr; |
| 489 | } |
| 490 | |
| 491 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 492 | * fcoe_lport_config() - Set up a local port |
| 493 | * @lport: The local port to be setup |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 494 | * |
| 495 | * Returns: 0 for success |
| 496 | */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 497 | static int fcoe_lport_config(struct fc_lport *lport) |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 498 | { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 499 | lport->link_up = 0; |
| 500 | lport->qfull = 0; |
| 501 | lport->max_retry_count = 3; |
| 502 | lport->max_rport_retry_count = 3; |
| 503 | lport->e_d_tov = 2 * 1000; /* FC-FS default */ |
| 504 | lport->r_a_tov = 2 * 2 * 1000; |
| 505 | lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | |
| 506 | FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); |
| 507 | lport->does_npiv = 1; |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 508 | |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 509 | fc_lport_init_stats(lport); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 510 | |
| 511 | /* lport fc_lport related configuration */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 512 | fc_lport_config(lport); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 513 | |
| 514 | /* offload related configuration */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 515 | lport->crc_offload = 0; |
| 516 | lport->seq_offload = 0; |
| 517 | lport->lro_enabled = 0; |
| 518 | lport->lro_xid = 0; |
| 519 | lport->lso_max = 0; |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 520 | |
| 521 | return 0; |
| 522 | } |
| 523 | |
| 524 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 525 | * fcoe_queue_timer() - The fcoe queue timer |
| 526 | * @lport: The local port |
Vasu Dev | 1047f22 | 2009-05-06 10:52:40 -0700 | [diff] [blame] | 527 | * |
| 528 | * Calls fcoe_check_wait_queue on timeout |
Vasu Dev | 1047f22 | 2009-05-06 10:52:40 -0700 | [diff] [blame] | 529 | */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 530 | static void fcoe_queue_timer(ulong lport) |
Vasu Dev | 1047f22 | 2009-05-06 10:52:40 -0700 | [diff] [blame] | 531 | { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 532 | fcoe_check_wait_queue((struct fc_lport *)lport, NULL); |
Vasu Dev | 1047f22 | 2009-05-06 10:52:40 -0700 | [diff] [blame] | 533 | } |
| 534 | |
| 535 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 536 | * fcoe_netdev_config() - Set up net devive for SW FCoE |
| 537 | * @lport: The local port that is associated with the net device |
| 538 | * @netdev: The associated net device |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 539 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 540 | * Must be called after fcoe_lport_config() as it will use local port mutex |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 541 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 542 | * Returns: 0 for success |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 543 | */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 544 | static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 545 | { |
| 546 | u32 mfs; |
| 547 | u64 wwnn, wwpn; |
Chris Leech | 2502498 | 2009-08-25 13:59:35 -0700 | [diff] [blame] | 548 | struct fcoe_interface *fcoe; |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 549 | struct fcoe_port *port; |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 550 | |
| 551 | /* Setup lport private data to point to fcoe softc */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 552 | port = lport_priv(lport); |
Chris Leech | 2502498 | 2009-08-25 13:59:35 -0700 | [diff] [blame] | 553 | fcoe = port->fcoe; |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 554 | |
| 555 | /* |
| 556 | * Determine max frame size based on underlying device and optional |
| 557 | * user-configured limit. If the MFS is too low, fcoe_link_ok() |
| 558 | * will return 0, so do this first. |
| 559 | */ |
Yi Zou | 7221d7e | 2009-10-21 16:27:52 -0700 | [diff] [blame] | 560 | mfs = netdev->mtu; |
| 561 | if (netdev->features & NETIF_F_FCOE_MTU) { |
| 562 | mfs = FCOE_MTU; |
| 563 | FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); |
| 564 | } |
| 565 | mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 566 | if (fc_set_mfs(lport, mfs)) |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 567 | return -EINVAL; |
| 568 | |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 569 | /* offload features support */ |
Vasu Dev | 1d1b88d | 2009-07-29 17:05:45 -0700 | [diff] [blame] | 570 | if (netdev->features & NETIF_F_SG) |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 571 | lport->sg_supp = 1; |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 572 | |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 573 | if (netdev->features & NETIF_F_FCOE_CRC) { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 574 | lport->crc_offload = 1; |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 575 | FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 576 | } |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 577 | if (netdev->features & NETIF_F_FSO) { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 578 | lport->seq_offload = 1; |
| 579 | lport->lso_max = netdev->gso_max_size; |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 580 | FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 581 | lport->lso_max); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 582 | } |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 583 | if (netdev->fcoe_ddp_xid) { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 584 | lport->lro_enabled = 1; |
| 585 | lport->lro_xid = netdev->fcoe_ddp_xid; |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 586 | FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 587 | lport->lro_xid); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 588 | } |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 589 | skb_queue_head_init(&port->fcoe_pending_queue); |
| 590 | port->fcoe_pending_queue_active = 0; |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 591 | setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 592 | |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 593 | if (!lport->vport) { |
Chris Leech | 9a05753 | 2009-11-03 11:46:40 -0800 | [diff] [blame] | 594 | wwnn = fcoe_wwn_from_mac(netdev->dev_addr, 1, 0); |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 595 | fc_set_wwnn(lport, wwnn); |
Chris Leech | 9a05753 | 2009-11-03 11:46:40 -0800 | [diff] [blame] | 596 | /* XXX - 3rd arg needs to be vlan id */ |
| 597 | wwpn = fcoe_wwn_from_mac(netdev->dev_addr, 2, 0); |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 598 | fc_set_wwpn(lport, wwpn); |
Chris Leech | 9a05753 | 2009-11-03 11:46:40 -0800 | [diff] [blame] | 599 | } |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 600 | |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 601 | return 0; |
| 602 | } |
| 603 | |
| 604 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 605 | * fcoe_shost_config() - Set up the SCSI host associated with a local port |
| 606 | * @lport: The local port |
| 607 | * @shost: The SCSI host to associate with the local port |
| 608 | * @dev: The device associated with the SCSI host |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 609 | * |
| 610 | * Must be called after fcoe_lport_config() and fcoe_netdev_config() |
| 611 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 612 | * Returns: 0 for success |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 613 | */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 614 | static int fcoe_shost_config(struct fc_lport *lport, struct Scsi_Host *shost, |
| 615 | struct device *dev) |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 616 | { |
| 617 | int rc = 0; |
| 618 | |
| 619 | /* lport scsi host config */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 620 | lport->host->max_lun = FCOE_MAX_LUN; |
| 621 | lport->host->max_id = FCOE_MAX_FCP_TARGET; |
| 622 | lport->host->max_channel = 0; |
| 623 | if (lport->vport) |
| 624 | lport->host->transportt = fcoe_vport_transport_template; |
Chris Leech | e9084bb | 2009-11-03 11:46:34 -0800 | [diff] [blame] | 625 | else |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 626 | lport->host->transportt = fcoe_transport_template; |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 627 | |
| 628 | /* add the new host to the SCSI-ml */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 629 | rc = scsi_add_host(lport->host, dev); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 630 | if (rc) { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 631 | FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 632 | "error on scsi_add_host\n"); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 633 | return rc; |
| 634 | } |
Chris Leech | 9a05753 | 2009-11-03 11:46:40 -0800 | [diff] [blame] | 635 | |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 636 | if (!lport->vport) |
| 637 | fc_host_max_npiv_vports(lport->host) = USHORT_MAX; |
Chris Leech | 9a05753 | 2009-11-03 11:46:40 -0800 | [diff] [blame] | 638 | |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 639 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, |
Chris Leech | 5baa17c | 2009-11-03 11:46:56 -0800 | [diff] [blame] | 640 | "%s v%s over %s", FCOE_NAME, FCOE_VERSION, |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 641 | fcoe_netdev(lport)->name); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 642 | |
| 643 | return 0; |
| 644 | } |
| 645 | |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 646 | /** |
| 647 | * fcoe_oem_match() - The match routine for the offloaded exchange manager |
| 648 | * @fp: The I/O frame |
Vasu Dev | d717968 | 2009-07-29 17:05:21 -0700 | [diff] [blame] | 649 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 650 | * This routine will be associated with an exchange manager (EM). When |
| 651 | * the libfc exchange handling code is looking for an EM to use it will |
| 652 | * call this routine and pass it the frame that it wishes to send. This |
| 653 | * routine will return True if the associated EM is to be used and False |
| 654 | * if the echange code should continue looking for an EM. |
| 655 | * |
| 656 | * The offload EM that this routine is associated with will handle any |
| 657 | * packets that are for SCSI read requests. |
| 658 | * |
| 659 | * Returns: True for read types I/O, otherwise returns false. |
Vasu Dev | d717968 | 2009-07-29 17:05:21 -0700 | [diff] [blame] | 660 | */ |
| 661 | bool fcoe_oem_match(struct fc_frame *fp) |
| 662 | { |
Yi Zou | 05cc739 | 2009-08-25 13:59:03 -0700 | [diff] [blame] | 663 | return fc_fcp_is_read(fr_fsp(fp)) && |
| 664 | (fr_fsp(fp)->data_len > fcoe_ddp_min); |
Vasu Dev | d717968 | 2009-07-29 17:05:21 -0700 | [diff] [blame] | 665 | } |
| 666 | |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 667 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 668 | * fcoe_em_config() - Allocate and configure an exchange manager |
| 669 | * @lport: The local port that the new EM will be associated with |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 670 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 671 | * Returns: 0 on success |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 672 | */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 673 | static inline int fcoe_em_config(struct fc_lport *lport) |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 674 | { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 675 | struct fcoe_port *port = lport_priv(lport); |
Chris Leech | 2502498 | 2009-08-25 13:59:35 -0700 | [diff] [blame] | 676 | struct fcoe_interface *fcoe = port->fcoe; |
| 677 | struct fcoe_interface *oldfcoe = NULL; |
Vasu Dev | 1d1b88d | 2009-07-29 17:05:45 -0700 | [diff] [blame] | 678 | struct net_device *old_real_dev, *cur_real_dev; |
Vasu Dev | d717968 | 2009-07-29 17:05:21 -0700 | [diff] [blame] | 679 | u16 min_xid = FCOE_MIN_XID; |
| 680 | u16 max_xid = FCOE_MAX_XID; |
| 681 | |
| 682 | /* |
| 683 | * Check if need to allocate an em instance for |
| 684 | * offload exchange ids to be shared across all VN_PORTs/lport. |
| 685 | */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 686 | if (!lport->lro_enabled || !lport->lro_xid || |
| 687 | (lport->lro_xid >= max_xid)) { |
| 688 | lport->lro_xid = 0; |
Vasu Dev | d717968 | 2009-07-29 17:05:21 -0700 | [diff] [blame] | 689 | goto skip_oem; |
| 690 | } |
| 691 | |
| 692 | /* |
| 693 | * Reuse existing offload em instance in case |
Vasu Dev | 1d1b88d | 2009-07-29 17:05:45 -0700 | [diff] [blame] | 694 | * it is already allocated on real eth device |
Vasu Dev | d717968 | 2009-07-29 17:05:21 -0700 | [diff] [blame] | 695 | */ |
Chris Leech | 2502498 | 2009-08-25 13:59:35 -0700 | [diff] [blame] | 696 | if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
| 697 | cur_real_dev = vlan_dev_real_dev(fcoe->netdev); |
Vasu Dev | 1d1b88d | 2009-07-29 17:05:45 -0700 | [diff] [blame] | 698 | else |
Chris Leech | 2502498 | 2009-08-25 13:59:35 -0700 | [diff] [blame] | 699 | cur_real_dev = fcoe->netdev; |
Vasu Dev | 1d1b88d | 2009-07-29 17:05:45 -0700 | [diff] [blame] | 700 | |
Chris Leech | 2502498 | 2009-08-25 13:59:35 -0700 | [diff] [blame] | 701 | list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { |
Chris Leech | 2502498 | 2009-08-25 13:59:35 -0700 | [diff] [blame] | 702 | if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
| 703 | old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); |
Vasu Dev | 1d1b88d | 2009-07-29 17:05:45 -0700 | [diff] [blame] | 704 | else |
Chris Leech | 2502498 | 2009-08-25 13:59:35 -0700 | [diff] [blame] | 705 | old_real_dev = oldfcoe->netdev; |
Vasu Dev | 1d1b88d | 2009-07-29 17:05:45 -0700 | [diff] [blame] | 706 | |
| 707 | if (cur_real_dev == old_real_dev) { |
Chris Leech | 991cbb6 | 2009-08-25 13:59:51 -0700 | [diff] [blame] | 708 | fcoe->oem = oldfcoe->oem; |
Vasu Dev | d717968 | 2009-07-29 17:05:21 -0700 | [diff] [blame] | 709 | break; |
| 710 | } |
| 711 | } |
| 712 | |
Chris Leech | 991cbb6 | 2009-08-25 13:59:51 -0700 | [diff] [blame] | 713 | if (fcoe->oem) { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 714 | if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { |
Vasu Dev | d717968 | 2009-07-29 17:05:21 -0700 | [diff] [blame] | 715 | printk(KERN_ERR "fcoe_em_config: failed to add " |
| 716 | "offload em:%p on interface:%s\n", |
Chris Leech | 991cbb6 | 2009-08-25 13:59:51 -0700 | [diff] [blame] | 717 | fcoe->oem, fcoe->netdev->name); |
Vasu Dev | d717968 | 2009-07-29 17:05:21 -0700 | [diff] [blame] | 718 | return -ENOMEM; |
| 719 | } |
| 720 | } else { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 721 | fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, |
| 722 | FCOE_MIN_XID, lport->lro_xid, |
| 723 | fcoe_oem_match); |
Chris Leech | 991cbb6 | 2009-08-25 13:59:51 -0700 | [diff] [blame] | 724 | if (!fcoe->oem) { |
Vasu Dev | d717968 | 2009-07-29 17:05:21 -0700 | [diff] [blame] | 725 | printk(KERN_ERR "fcoe_em_config: failed to allocate " |
| 726 | "em for offload exches on interface:%s\n", |
Chris Leech | 2502498 | 2009-08-25 13:59:35 -0700 | [diff] [blame] | 727 | fcoe->netdev->name); |
Vasu Dev | d717968 | 2009-07-29 17:05:21 -0700 | [diff] [blame] | 728 | return -ENOMEM; |
| 729 | } |
| 730 | } |
| 731 | |
| 732 | /* |
| 733 | * Exclude offload EM xid range from next EM xid range. |
| 734 | */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 735 | min_xid += lport->lro_xid + 1; |
Vasu Dev | d717968 | 2009-07-29 17:05:21 -0700 | [diff] [blame] | 736 | |
| 737 | skip_oem: |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 738 | if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { |
Vasu Dev | d717968 | 2009-07-29 17:05:21 -0700 | [diff] [blame] | 739 | printk(KERN_ERR "fcoe_em_config: failed to " |
Chris Leech | 2502498 | 2009-08-25 13:59:35 -0700 | [diff] [blame] | 740 | "allocate em on interface %s\n", fcoe->netdev->name); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 741 | return -ENOMEM; |
Vasu Dev | d717968 | 2009-07-29 17:05:21 -0700 | [diff] [blame] | 742 | } |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 743 | |
| 744 | return 0; |
| 745 | } |
| 746 | |
| 747 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 748 | * fcoe_if_destroy() - Tear down a SW FCoE instance |
| 749 | * @lport: The local port to be destroyed |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 750 | */ |
Chris Leech | af7f85d | 2009-08-25 13:59:24 -0700 | [diff] [blame] | 751 | static void fcoe_if_destroy(struct fc_lport *lport) |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 752 | { |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 753 | struct fcoe_port *port = lport_priv(lport); |
| 754 | struct fcoe_interface *fcoe = port->fcoe; |
Chris Leech | 2502498 | 2009-08-25 13:59:35 -0700 | [diff] [blame] | 755 | struct net_device *netdev = fcoe->netdev; |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 756 | |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 757 | FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 758 | |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 759 | /* Logout of the fabric */ |
Chris Leech | af7f85d | 2009-08-25 13:59:24 -0700 | [diff] [blame] | 760 | fc_fabric_logoff(lport); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 761 | |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 762 | /* Cleanup the fc_lport */ |
Chris Leech | af7f85d | 2009-08-25 13:59:24 -0700 | [diff] [blame] | 763 | fc_lport_destroy(lport); |
| 764 | fc_fcp_destroy(lport); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 765 | |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 766 | /* Stop the transmit retry timer */ |
| 767 | del_timer_sync(&port->timer); |
| 768 | |
| 769 | /* Free existing transmit skbs */ |
| 770 | fcoe_clean_pending_queue(lport); |
| 771 | |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame] | 772 | rtnl_lock(); |
| 773 | if (!is_zero_ether_addr(port->data_src_addr)) |
| 774 | dev_unicast_delete(netdev, port->data_src_addr); |
| 775 | rtnl_unlock(); |
| 776 | |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 777 | /* receives may not be stopped until after this */ |
| 778 | fcoe_interface_put(fcoe); |
| 779 | |
| 780 | /* Free queued packets for the per-CPU receive threads */ |
| 781 | fcoe_percpu_clean(lport); |
| 782 | |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 783 | /* Detach from the scsi-ml */ |
Chris Leech | af7f85d | 2009-08-25 13:59:24 -0700 | [diff] [blame] | 784 | fc_remove_host(lport->host); |
| 785 | scsi_remove_host(lport->host); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 786 | |
| 787 | /* There are no more rports or I/O, free the EM */ |
Chris Leech | af7f85d | 2009-08-25 13:59:24 -0700 | [diff] [blame] | 788 | fc_exch_mgr_free(lport); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 789 | |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 790 | /* Free memory used by statistical counters */ |
Chris Leech | af7f85d | 2009-08-25 13:59:24 -0700 | [diff] [blame] | 791 | fc_lport_free_stats(lport); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 792 | |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 793 | /* Release the Scsi_Host */ |
Chris Leech | af7f85d | 2009-08-25 13:59:24 -0700 | [diff] [blame] | 794 | scsi_host_put(lport->host); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 795 | } |
| 796 | |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 797 | /** |
| 798 | * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device |
| 799 | * @lport: The local port to setup DDP for |
| 800 | * @xid: The exchange ID for this DDP transfer |
| 801 | * @sgl: The scatterlist describing this transfer |
| 802 | * @sgc: The number of sg items |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 803 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 804 | * Returns: 0 if the DDP context was not configured |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 805 | */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 806 | static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, |
| 807 | struct scatterlist *sgl, unsigned int sgc) |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 808 | { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 809 | struct net_device *netdev = fcoe_netdev(lport); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 810 | |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 811 | if (netdev->netdev_ops->ndo_fcoe_ddp_setup) |
| 812 | return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, |
| 813 | xid, sgl, |
| 814 | sgc); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 815 | |
| 816 | return 0; |
| 817 | } |
| 818 | |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 819 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 820 | * fcoe_ddp_done() - Call a LLD's ddp_done through the net device |
| 821 | * @lport: The local port to complete DDP on |
| 822 | * @xid: The exchange ID for this DDP transfer |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 823 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 824 | * Returns: the length of data that have been completed by DDP |
| 825 | */ |
| 826 | static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) |
| 827 | { |
| 828 | struct net_device *netdev = fcoe_netdev(lport); |
| 829 | |
| 830 | if (netdev->netdev_ops->ndo_fcoe_ddp_done) |
| 831 | return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); |
| 832 | return 0; |
| 833 | } |
| 834 | |
| 835 | /** |
| 836 | * fcoe_if_create() - Create a FCoE instance on an interface |
| 837 | * @fcoe: The FCoE interface to create a local port on |
| 838 | * @parent: The device pointer to be the parent in sysfs for the SCSI host |
| 839 | * @npiv: Indicates if the port is a vport or not |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 840 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 841 | * Creates a fc_lport instance and a Scsi_Host instance and configure them. |
| 842 | * |
| 843 | * Returns: The allocated fc_lport or an error pointer |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 844 | */ |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 845 | static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, |
Chris Leech | 9a05753 | 2009-11-03 11:46:40 -0800 | [diff] [blame] | 846 | struct device *parent, int npiv) |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 847 | { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 848 | struct net_device *netdev = fcoe->netdev; |
Chris Leech | af7f85d | 2009-08-25 13:59:24 -0700 | [diff] [blame] | 849 | struct fc_lport *lport = NULL; |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 850 | struct fcoe_port *port; |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 851 | struct Scsi_Host *shost; |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 852 | int rc; |
Chris Leech | 9a05753 | 2009-11-03 11:46:40 -0800 | [diff] [blame] | 853 | /* |
| 854 | * parent is only a vport if npiv is 1, |
| 855 | * but we'll only use vport in that case so go ahead and set it |
| 856 | */ |
| 857 | struct fc_vport *vport = dev_to_vport(parent); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 858 | |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 859 | FCOE_NETDEV_DBG(netdev, "Create Interface\n"); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 860 | |
Chris Leech | 9a05753 | 2009-11-03 11:46:40 -0800 | [diff] [blame] | 861 | if (!npiv) { |
| 862 | lport = libfc_host_alloc(&fcoe_shost_template, |
| 863 | sizeof(struct fcoe_port)); |
| 864 | } else { |
| 865 | lport = libfc_vport_create(vport, |
| 866 | sizeof(struct fcoe_port)); |
| 867 | } |
Chris Leech | 8622196 | 2009-11-03 11:46:08 -0800 | [diff] [blame] | 868 | if (!lport) { |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 869 | FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); |
| 870 | rc = -ENOMEM; |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 871 | goto out; |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 872 | } |
Chris Leech | 8622196 | 2009-11-03 11:46:08 -0800 | [diff] [blame] | 873 | shost = lport->host; |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 874 | port = lport_priv(lport); |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 875 | port->lport = lport; |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 876 | port->fcoe = fcoe; |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 877 | INIT_WORK(&port->destroy_work, fcoe_destroy_work); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 878 | |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 879 | /* configure a fc_lport including the exchange manager */ |
Chris Leech | af7f85d | 2009-08-25 13:59:24 -0700 | [diff] [blame] | 880 | rc = fcoe_lport_config(lport); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 881 | if (rc) { |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 882 | FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " |
| 883 | "interface\n"); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 884 | goto out_host_put; |
| 885 | } |
| 886 | |
Chris Leech | 9a05753 | 2009-11-03 11:46:40 -0800 | [diff] [blame] | 887 | if (npiv) { |
| 888 | FCOE_NETDEV_DBG(netdev, "Setting vport names, 0x%llX 0x%llX\n", |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 889 | vport->node_name, vport->port_name); |
Chris Leech | 9a05753 | 2009-11-03 11:46:40 -0800 | [diff] [blame] | 890 | fc_set_wwnn(lport, vport->node_name); |
| 891 | fc_set_wwpn(lport, vport->port_name); |
| 892 | } |
| 893 | |
Vasu Dev | ab6b85c | 2009-05-17 12:33:08 +0000 | [diff] [blame] | 894 | /* configure lport network properties */ |
Chris Leech | af7f85d | 2009-08-25 13:59:24 -0700 | [diff] [blame] | 895 | rc = fcoe_netdev_config(lport, netdev); |
Vasu Dev | ab6b85c | 2009-05-17 12:33:08 +0000 | [diff] [blame] | 896 | if (rc) { |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 897 | FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " |
| 898 | "interface\n"); |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 899 | goto out_lp_destroy; |
Vasu Dev | ab6b85c | 2009-05-17 12:33:08 +0000 | [diff] [blame] | 900 | } |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 901 | |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 902 | /* configure lport scsi host properties */ |
Chris Leech | af7f85d | 2009-08-25 13:59:24 -0700 | [diff] [blame] | 903 | rc = fcoe_shost_config(lport, shost, parent); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 904 | if (rc) { |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 905 | FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " |
| 906 | "interface\n"); |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 907 | goto out_lp_destroy; |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 908 | } |
| 909 | |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 910 | /* Initialize the library */ |
Chris Leech | af7f85d | 2009-08-25 13:59:24 -0700 | [diff] [blame] | 911 | rc = fcoe_libfc_config(lport, &fcoe_libfc_fcn_templ); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 912 | if (rc) { |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 913 | FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " |
| 914 | "interface\n"); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 915 | goto out_lp_destroy; |
| 916 | } |
| 917 | |
Chris Leech | 9a05753 | 2009-11-03 11:46:40 -0800 | [diff] [blame] | 918 | if (!npiv) { |
| 919 | /* |
| 920 | * fcoe_em_alloc() and fcoe_hostlist_add() both |
| 921 | * need to be atomic with respect to other changes to the |
| 922 | * hostlist since fcoe_em_alloc() looks for an existing EM |
| 923 | * instance on host list updated by fcoe_hostlist_add(). |
| 924 | * |
| 925 | * This is currently handled through the fcoe_config_mutex |
| 926 | * begin held. |
| 927 | */ |
Chris Leech | c863df3 | 2009-08-25 14:00:18 -0700 | [diff] [blame] | 928 | |
Chris Leech | 9a05753 | 2009-11-03 11:46:40 -0800 | [diff] [blame] | 929 | /* lport exch manager allocation */ |
| 930 | rc = fcoe_em_config(lport); |
| 931 | if (rc) { |
| 932 | FCOE_NETDEV_DBG(netdev, "Could not configure the EM " |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 933 | "for the interface\n"); |
Chris Leech | 9a05753 | 2009-11-03 11:46:40 -0800 | [diff] [blame] | 934 | goto out_lp_destroy; |
| 935 | } |
Vasu Dev | 9631609 | 2009-07-29 17:05:00 -0700 | [diff] [blame] | 936 | } |
| 937 | |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 938 | fcoe_interface_get(fcoe); |
Chris Leech | af7f85d | 2009-08-25 13:59:24 -0700 | [diff] [blame] | 939 | return lport; |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 940 | |
| 941 | out_lp_destroy: |
Chris Leech | af7f85d | 2009-08-25 13:59:24 -0700 | [diff] [blame] | 942 | fc_exch_mgr_free(lport); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 943 | out_host_put: |
Chris Leech | af7f85d | 2009-08-25 13:59:24 -0700 | [diff] [blame] | 944 | scsi_host_put(lport->host); |
| 945 | out: |
| 946 | return ERR_PTR(rc); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 947 | } |
| 948 | |
| 949 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 950 | * fcoe_if_init() - Initialization routine for fcoe.ko |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 951 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 952 | * Attaches the SW FCoE transport to the FC transport |
| 953 | * |
| 954 | * Returns: 0 on success |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 955 | */ |
| 956 | static int __init fcoe_if_init(void) |
| 957 | { |
| 958 | /* attach to scsi transport */ |
Chris Leech | e9084bb | 2009-11-03 11:46:34 -0800 | [diff] [blame] | 959 | fcoe_transport_template = fc_attach_transport(&fcoe_transport_function); |
| 960 | fcoe_vport_transport_template = |
| 961 | fc_attach_transport(&fcoe_vport_transport_function); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 962 | |
Chris Leech | e9084bb | 2009-11-03 11:46:34 -0800 | [diff] [blame] | 963 | if (!fcoe_transport_template) { |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 964 | printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 965 | return -ENODEV; |
| 966 | } |
| 967 | |
| 968 | return 0; |
| 969 | } |
| 970 | |
| 971 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 972 | * fcoe_if_exit() - Tear down fcoe.ko |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 973 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 974 | * Detaches the SW FCoE transport from the FC transport |
| 975 | * |
| 976 | * Returns: 0 on success |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 977 | */ |
| 978 | int __exit fcoe_if_exit(void) |
| 979 | { |
Chris Leech | e9084bb | 2009-11-03 11:46:34 -0800 | [diff] [blame] | 980 | fc_release_transport(fcoe_transport_template); |
| 981 | fc_release_transport(fcoe_vport_transport_template); |
| 982 | fcoe_transport_template = NULL; |
| 983 | fcoe_vport_transport_template = NULL; |
Vasu Dev | 7f34914 | 2009-03-27 09:06:31 -0700 | [diff] [blame] | 984 | return 0; |
| 985 | } |
| 986 | |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 987 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 988 | * fcoe_percpu_thread_create() - Create a receive thread for an online CPU |
| 989 | * @cpu: The CPU index of the CPU to create a receive thread for |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 990 | */ |
| 991 | static void fcoe_percpu_thread_create(unsigned int cpu) |
| 992 | { |
| 993 | struct fcoe_percpu_s *p; |
| 994 | struct task_struct *thread; |
| 995 | |
| 996 | p = &per_cpu(fcoe_percpu, cpu); |
| 997 | |
| 998 | thread = kthread_create(fcoe_percpu_receive_thread, |
| 999 | (void *)p, "fcoethread/%d", cpu); |
| 1000 | |
Joe Eykholt | e7a5199 | 2009-08-25 14:04:08 -0700 | [diff] [blame] | 1001 | if (likely(!IS_ERR(thread))) { |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 1002 | kthread_bind(thread, cpu); |
| 1003 | wake_up_process(thread); |
| 1004 | |
| 1005 | spin_lock_bh(&p->fcoe_rx_list.lock); |
| 1006 | p->thread = thread; |
| 1007 | spin_unlock_bh(&p->fcoe_rx_list.lock); |
| 1008 | } |
| 1009 | } |
| 1010 | |
| 1011 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1012 | * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU |
| 1013 | * @cpu: The CPU index of the CPU whose receive thread is to be destroyed |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 1014 | * |
| 1015 | * Destroys a per-CPU Rx thread. Any pending skbs are moved to the |
| 1016 | * current CPU's Rx thread. If the thread being destroyed is bound to |
| 1017 | * the CPU processing this context the skbs will be freed. |
| 1018 | */ |
| 1019 | static void fcoe_percpu_thread_destroy(unsigned int cpu) |
| 1020 | { |
| 1021 | struct fcoe_percpu_s *p; |
| 1022 | struct task_struct *thread; |
| 1023 | struct page *crc_eof; |
| 1024 | struct sk_buff *skb; |
| 1025 | #ifdef CONFIG_SMP |
| 1026 | struct fcoe_percpu_s *p0; |
| 1027 | unsigned targ_cpu = smp_processor_id(); |
| 1028 | #endif /* CONFIG_SMP */ |
| 1029 | |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 1030 | FCOE_DBG("Destroying receive thread for CPU %d\n", cpu); |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 1031 | |
| 1032 | /* Prevent any new skbs from being queued for this CPU. */ |
| 1033 | p = &per_cpu(fcoe_percpu, cpu); |
| 1034 | spin_lock_bh(&p->fcoe_rx_list.lock); |
| 1035 | thread = p->thread; |
| 1036 | p->thread = NULL; |
| 1037 | crc_eof = p->crc_eof_page; |
| 1038 | p->crc_eof_page = NULL; |
| 1039 | p->crc_eof_offset = 0; |
| 1040 | spin_unlock_bh(&p->fcoe_rx_list.lock); |
| 1041 | |
| 1042 | #ifdef CONFIG_SMP |
| 1043 | /* |
| 1044 | * Don't bother moving the skb's if this context is running |
| 1045 | * on the same CPU that is having its thread destroyed. This |
| 1046 | * can easily happen when the module is removed. |
| 1047 | */ |
| 1048 | if (cpu != targ_cpu) { |
| 1049 | p0 = &per_cpu(fcoe_percpu, targ_cpu); |
| 1050 | spin_lock_bh(&p0->fcoe_rx_list.lock); |
| 1051 | if (p0->thread) { |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 1052 | FCOE_DBG("Moving frames from CPU %d to CPU %d\n", |
| 1053 | cpu, targ_cpu); |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 1054 | |
| 1055 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) |
| 1056 | __skb_queue_tail(&p0->fcoe_rx_list, skb); |
| 1057 | spin_unlock_bh(&p0->fcoe_rx_list.lock); |
| 1058 | } else { |
| 1059 | /* |
| 1060 | * The targeted CPU is not initialized and cannot accept |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1061 | * new skbs. Unlock the targeted CPU and drop the skbs |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 1062 | * on the CPU that is going offline. |
| 1063 | */ |
| 1064 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) |
| 1065 | kfree_skb(skb); |
| 1066 | spin_unlock_bh(&p0->fcoe_rx_list.lock); |
| 1067 | } |
| 1068 | } else { |
| 1069 | /* |
| 1070 | * This scenario occurs when the module is being removed |
| 1071 | * and all threads are being destroyed. skbs will continue |
| 1072 | * to be shifted from the CPU thread that is being removed |
| 1073 | * to the CPU thread associated with the CPU that is processing |
| 1074 | * the module removal. Once there is only one CPU Rx thread it |
| 1075 | * will reach this case and we will drop all skbs and later |
| 1076 | * stop the thread. |
| 1077 | */ |
| 1078 | spin_lock_bh(&p->fcoe_rx_list.lock); |
| 1079 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) |
| 1080 | kfree_skb(skb); |
| 1081 | spin_unlock_bh(&p->fcoe_rx_list.lock); |
| 1082 | } |
| 1083 | #else |
| 1084 | /* |
Chris Leech | dd3fd72 | 2009-04-21 16:27:36 -0700 | [diff] [blame] | 1085 | * This a non-SMP scenario where the singular Rx thread is |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 1086 | * being removed. Free all skbs and stop the thread. |
| 1087 | */ |
| 1088 | spin_lock_bh(&p->fcoe_rx_list.lock); |
| 1089 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) |
| 1090 | kfree_skb(skb); |
| 1091 | spin_unlock_bh(&p->fcoe_rx_list.lock); |
| 1092 | #endif |
| 1093 | |
| 1094 | if (thread) |
| 1095 | kthread_stop(thread); |
| 1096 | |
| 1097 | if (crc_eof) |
| 1098 | put_page(crc_eof); |
| 1099 | } |
| 1100 | |
| 1101 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1102 | * fcoe_cpu_callback() - Handler for CPU hotplug events |
| 1103 | * @nfb: The callback data block |
| 1104 | * @action: The event triggering the callback |
| 1105 | * @hcpu: The index of the CPU that the event is for |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 1106 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1107 | * This creates or destroys per-CPU data for fcoe |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 1108 | * |
| 1109 | * Returns NOTIFY_OK always. |
| 1110 | */ |
| 1111 | static int fcoe_cpu_callback(struct notifier_block *nfb, |
| 1112 | unsigned long action, void *hcpu) |
| 1113 | { |
| 1114 | unsigned cpu = (unsigned long)hcpu; |
| 1115 | |
| 1116 | switch (action) { |
| 1117 | case CPU_ONLINE: |
| 1118 | case CPU_ONLINE_FROZEN: |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 1119 | FCOE_DBG("CPU %x online: Create Rx thread\n", cpu); |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 1120 | fcoe_percpu_thread_create(cpu); |
| 1121 | break; |
| 1122 | case CPU_DEAD: |
| 1123 | case CPU_DEAD_FROZEN: |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 1124 | FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu); |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 1125 | fcoe_percpu_thread_destroy(cpu); |
| 1126 | break; |
| 1127 | default: |
| 1128 | break; |
| 1129 | } |
| 1130 | return NOTIFY_OK; |
| 1131 | } |
| 1132 | |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 1133 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1134 | * fcoe_rcv() - Receive packets from a net device |
| 1135 | * @skb: The received packet |
| 1136 | * @netdev: The net device that the packet was received on |
| 1137 | * @ptype: The packet type context |
| 1138 | * @olddev: The last device net device |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1139 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1140 | * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a |
| 1141 | * FC frame and passes the frame to libfc. |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1142 | * |
| 1143 | * Returns: 0 for success |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 1144 | */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1145 | int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1146 | struct packet_type *ptype, struct net_device *olddev) |
| 1147 | { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1148 | struct fc_lport *lport; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1149 | struct fcoe_rcv_info *fr; |
Chris Leech | 259ad85 | 2009-08-25 13:59:41 -0700 | [diff] [blame] | 1150 | struct fcoe_interface *fcoe; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1151 | struct fc_frame_header *fh; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1152 | struct fcoe_percpu_s *fps; |
Vasu Dev | b2f0091 | 2009-08-25 13:58:53 -0700 | [diff] [blame] | 1153 | unsigned int cpu; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1154 | |
Chris Leech | 259ad85 | 2009-08-25 13:59:41 -0700 | [diff] [blame] | 1155 | fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1156 | lport = fcoe->ctlr.lp; |
| 1157 | if (unlikely(!lport)) { |
| 1158 | FCOE_NETDEV_DBG(netdev, "Cannot find hba structure"); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1159 | goto err2; |
| 1160 | } |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1161 | if (!lport->link_up) |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1162 | goto err2; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1163 | |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1164 | FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p " |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 1165 | "data:%p tail:%p end:%p sum:%d dev:%s", |
| 1166 | skb->len, skb->data_len, skb->head, skb->data, |
| 1167 | skb_tail_pointer(skb), skb_end_pointer(skb), |
| 1168 | skb->csum, skb->dev ? skb->dev->name : "<NULL>"); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1169 | |
| 1170 | /* check for FCOE packet type */ |
| 1171 | if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1172 | FCOE_NETDEV_DBG(netdev, "Wrong FC type frame"); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1173 | goto err; |
| 1174 | } |
| 1175 | |
| 1176 | /* |
| 1177 | * Check for minimum frame length, and make sure required FCoE |
| 1178 | * and FC headers are pulled into the linear data area. |
| 1179 | */ |
| 1180 | if (unlikely((skb->len < FCOE_MIN_FRAME) || |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1181 | !pskb_may_pull(skb, FCOE_HEADER_LEN))) |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1182 | goto err; |
| 1183 | |
| 1184 | skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); |
| 1185 | fh = (struct fc_frame_header *) skb_transport_header(skb); |
| 1186 | |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1187 | fr = fcoe_dev_from_skb(skb); |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1188 | fr->fr_dev = lport; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1189 | fr->ptype = ptype; |
Robert Love | 5e5e92d | 2009-03-17 11:41:35 -0700 | [diff] [blame] | 1190 | |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1191 | /* |
Vasu Dev | b2f0091 | 2009-08-25 13:58:53 -0700 | [diff] [blame] | 1192 | * In case the incoming frame's exchange is originated from |
| 1193 | * the initiator, then received frame's exchange id is ANDed |
| 1194 | * with fc_cpu_mask bits to get the same cpu on which exchange |
| 1195 | * was originated, otherwise just use the current cpu. |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1196 | */ |
Vasu Dev | b2f0091 | 2009-08-25 13:58:53 -0700 | [diff] [blame] | 1197 | if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) |
| 1198 | cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; |
| 1199 | else |
| 1200 | cpu = smp_processor_id(); |
Robert Love | 5e5e92d | 2009-03-17 11:41:35 -0700 | [diff] [blame] | 1201 | |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 1202 | fps = &per_cpu(fcoe_percpu, cpu); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1203 | spin_lock_bh(&fps->fcoe_rx_list.lock); |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 1204 | if (unlikely(!fps->thread)) { |
| 1205 | /* |
| 1206 | * The targeted CPU is not ready, let's target |
| 1207 | * the first CPU now. For non-SMP systems this |
| 1208 | * will check the same CPU twice. |
| 1209 | */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1210 | FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread " |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 1211 | "ready for incoming skb- using first online " |
| 1212 | "CPU.\n"); |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 1213 | |
| 1214 | spin_unlock_bh(&fps->fcoe_rx_list.lock); |
| 1215 | cpu = first_cpu(cpu_online_map); |
| 1216 | fps = &per_cpu(fcoe_percpu, cpu); |
| 1217 | spin_lock_bh(&fps->fcoe_rx_list.lock); |
| 1218 | if (!fps->thread) { |
| 1219 | spin_unlock_bh(&fps->fcoe_rx_list.lock); |
| 1220 | goto err; |
| 1221 | } |
| 1222 | } |
| 1223 | |
| 1224 | /* |
| 1225 | * We now have a valid CPU that we're targeting for |
| 1226 | * this skb. We also have this receive thread locked, |
| 1227 | * so we're free to queue skbs into it's queue. |
| 1228 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1229 | __skb_queue_tail(&fps->fcoe_rx_list, skb); |
| 1230 | if (fps->fcoe_rx_list.qlen == 1) |
| 1231 | wake_up_process(fps->thread); |
| 1232 | |
| 1233 | spin_unlock_bh(&fps->fcoe_rx_list.lock); |
| 1234 | |
| 1235 | return 0; |
| 1236 | err: |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1237 | fc_lport_get_stats(lport)->ErrorFrames++; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1238 | |
| 1239 | err2: |
| 1240 | kfree_skb(skb); |
| 1241 | return -1; |
| 1242 | } |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1243 | |
| 1244 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1245 | * fcoe_start_io() - Start FCoE I/O |
| 1246 | * @skb: The packet to be transmitted |
| 1247 | * |
| 1248 | * This routine is called from the net device to start transmitting |
| 1249 | * FCoE packets. |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1250 | * |
| 1251 | * Returns: 0 for success |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 1252 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1253 | static inline int fcoe_start_io(struct sk_buff *skb) |
| 1254 | { |
| 1255 | int rc; |
| 1256 | |
| 1257 | skb_get(skb); |
| 1258 | rc = dev_queue_xmit(skb); |
| 1259 | if (rc != 0) |
| 1260 | return rc; |
| 1261 | kfree_skb(skb); |
| 1262 | return 0; |
| 1263 | } |
| 1264 | |
| 1265 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1266 | * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC |
| 1267 | * @skb: The packet to be transmitted |
| 1268 | * @tlen: The total length of the trailer |
| 1269 | * |
| 1270 | * This routine allocates a page for frame trailers. The page is re-used if |
| 1271 | * there is enough room left on it for the current trailer. If there isn't |
| 1272 | * enough buffer left a new page is allocated for the trailer. Reference to |
| 1273 | * the page from this function as well as the skbs using the page fragments |
| 1274 | * ensure that the page is freed at the appropriate time. |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1275 | * |
| 1276 | * Returns: 0 for success |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 1277 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1278 | static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen) |
| 1279 | { |
| 1280 | struct fcoe_percpu_s *fps; |
| 1281 | struct page *page; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1282 | |
Robert Love | 5e5e92d | 2009-03-17 11:41:35 -0700 | [diff] [blame] | 1283 | fps = &get_cpu_var(fcoe_percpu); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1284 | page = fps->crc_eof_page; |
| 1285 | if (!page) { |
| 1286 | page = alloc_page(GFP_ATOMIC); |
| 1287 | if (!page) { |
Robert Love | 5e5e92d | 2009-03-17 11:41:35 -0700 | [diff] [blame] | 1288 | put_cpu_var(fcoe_percpu); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1289 | return -ENOMEM; |
| 1290 | } |
| 1291 | fps->crc_eof_page = page; |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 1292 | fps->crc_eof_offset = 0; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1293 | } |
| 1294 | |
| 1295 | get_page(page); |
| 1296 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, |
| 1297 | fps->crc_eof_offset, tlen); |
| 1298 | skb->len += tlen; |
| 1299 | skb->data_len += tlen; |
| 1300 | skb->truesize += tlen; |
| 1301 | fps->crc_eof_offset += sizeof(struct fcoe_crc_eof); |
| 1302 | |
| 1303 | if (fps->crc_eof_offset >= PAGE_SIZE) { |
| 1304 | fps->crc_eof_page = NULL; |
| 1305 | fps->crc_eof_offset = 0; |
| 1306 | put_page(page); |
| 1307 | } |
Robert Love | 5e5e92d | 2009-03-17 11:41:35 -0700 | [diff] [blame] | 1308 | put_cpu_var(fcoe_percpu); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1309 | return 0; |
| 1310 | } |
| 1311 | |
| 1312 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1313 | * fcoe_fc_crc() - Calculates the CRC for a given frame |
| 1314 | * @fp: The frame to be checksumed |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1315 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1316 | * This uses crc32() routine to calculate the CRC for a frame |
| 1317 | * |
| 1318 | * Return: The 32 bit CRC value |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 1319 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1320 | u32 fcoe_fc_crc(struct fc_frame *fp) |
| 1321 | { |
| 1322 | struct sk_buff *skb = fp_skb(fp); |
| 1323 | struct skb_frag_struct *frag; |
| 1324 | unsigned char *data; |
| 1325 | unsigned long off, len, clen; |
| 1326 | u32 crc; |
| 1327 | unsigned i; |
| 1328 | |
| 1329 | crc = crc32(~0, skb->data, skb_headlen(skb)); |
| 1330 | |
| 1331 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { |
| 1332 | frag = &skb_shinfo(skb)->frags[i]; |
| 1333 | off = frag->page_offset; |
| 1334 | len = frag->size; |
| 1335 | while (len > 0) { |
| 1336 | clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK)); |
| 1337 | data = kmap_atomic(frag->page + (off >> PAGE_SHIFT), |
| 1338 | KM_SKB_DATA_SOFTIRQ); |
| 1339 | crc = crc32(crc, data + (off & ~PAGE_MASK), clen); |
| 1340 | kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ); |
| 1341 | off += clen; |
| 1342 | len -= clen; |
| 1343 | } |
| 1344 | } |
| 1345 | return crc; |
| 1346 | } |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1347 | |
| 1348 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1349 | * fcoe_xmit() - Transmit a FCoE frame |
| 1350 | * @lport: The local port that the frame is to be transmitted for |
| 1351 | * @fp: The frame to be transmitted |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1352 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1353 | * Return: 0 for success |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 1354 | */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1355 | int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1356 | { |
Vasu Dev | 4bb6b51 | 2009-05-06 10:52:34 -0700 | [diff] [blame] | 1357 | int wlen; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1358 | u32 crc; |
| 1359 | struct ethhdr *eh; |
| 1360 | struct fcoe_crc_eof *cp; |
| 1361 | struct sk_buff *skb; |
| 1362 | struct fcoe_dev_stats *stats; |
| 1363 | struct fc_frame_header *fh; |
| 1364 | unsigned int hlen; /* header length implies the version */ |
| 1365 | unsigned int tlen; /* trailer length */ |
| 1366 | unsigned int elen; /* eth header, may include vlan */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1367 | struct fcoe_port *port = lport_priv(lport); |
Chris Leech | 3fe9a0b | 2009-08-25 13:59:46 -0700 | [diff] [blame] | 1368 | struct fcoe_interface *fcoe = port->fcoe; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1369 | u8 sof, eof; |
| 1370 | struct fcoe_hdr *hp; |
| 1371 | |
| 1372 | WARN_ON((fr_len(fp) % sizeof(u32)) != 0); |
| 1373 | |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1374 | fh = fc_frame_header_get(fp); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1375 | skb = fp_skb(fp); |
| 1376 | wlen = skb->len / FCOE_WORD_TO_BYTE; |
| 1377 | |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1378 | if (!lport->link_up) { |
Dan Carpenter | 3caf02e | 2009-04-21 16:27:25 -0700 | [diff] [blame] | 1379 | kfree_skb(skb); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1380 | return 0; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1381 | } |
| 1382 | |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1383 | if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) && |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1384 | fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb)) |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1385 | return 0; |
| 1386 | |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1387 | sof = fr_sof(fp); |
| 1388 | eof = fr_eof(fp); |
| 1389 | |
Vasu Dev | 4e57e1c | 2009-05-06 10:52:46 -0700 | [diff] [blame] | 1390 | elen = sizeof(struct ethhdr); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1391 | hlen = sizeof(struct fcoe_hdr); |
| 1392 | tlen = sizeof(struct fcoe_crc_eof); |
| 1393 | wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; |
| 1394 | |
| 1395 | /* crc offload */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1396 | if (likely(lport->crc_offload)) { |
Yi Zou | 39ca9a0 | 2009-02-27 14:07:15 -0800 | [diff] [blame] | 1397 | skb->ip_summed = CHECKSUM_PARTIAL; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1398 | skb->csum_start = skb_headroom(skb); |
| 1399 | skb->csum_offset = skb->len; |
| 1400 | crc = 0; |
| 1401 | } else { |
| 1402 | skb->ip_summed = CHECKSUM_NONE; |
| 1403 | crc = fcoe_fc_crc(fp); |
| 1404 | } |
| 1405 | |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1406 | /* copy port crc and eof to the skb buff */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1407 | if (skb_is_nonlinear(skb)) { |
| 1408 | skb_frag_t *frag; |
| 1409 | if (fcoe_get_paged_crc_eof(skb, tlen)) { |
Roel Kluin | e904158 | 2009-02-27 10:56:22 -0800 | [diff] [blame] | 1410 | kfree_skb(skb); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1411 | return -ENOMEM; |
| 1412 | } |
| 1413 | frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; |
| 1414 | cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ) |
| 1415 | + frag->page_offset; |
| 1416 | } else { |
| 1417 | cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); |
| 1418 | } |
| 1419 | |
| 1420 | memset(cp, 0, sizeof(*cp)); |
| 1421 | cp->fcoe_eof = eof; |
| 1422 | cp->fcoe_crc32 = cpu_to_le32(~crc); |
| 1423 | |
| 1424 | if (skb_is_nonlinear(skb)) { |
| 1425 | kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ); |
| 1426 | cp = NULL; |
| 1427 | } |
| 1428 | |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1429 | /* adjust skb network/transport offsets to match mac/fcoe/port */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1430 | skb_push(skb, elen + hlen); |
| 1431 | skb_reset_mac_header(skb); |
| 1432 | skb_reset_network_header(skb); |
| 1433 | skb->mac_len = elen; |
Yi Zou | 211c738 | 2009-02-27 14:06:37 -0800 | [diff] [blame] | 1434 | skb->protocol = htons(ETH_P_FCOE); |
Chris Leech | 3fe9a0b | 2009-08-25 13:59:46 -0700 | [diff] [blame] | 1435 | skb->dev = fcoe->netdev; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1436 | |
| 1437 | /* fill up mac and fcoe headers */ |
| 1438 | eh = eth_hdr(skb); |
| 1439 | eh->h_proto = htons(ETH_P_FCOE); |
Chris Leech | 3fe9a0b | 2009-08-25 13:59:46 -0700 | [diff] [blame] | 1440 | if (fcoe->ctlr.map_dest) |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1441 | fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id); |
| 1442 | else |
| 1443 | /* insert GW address */ |
Chris Leech | 3fe9a0b | 2009-08-25 13:59:46 -0700 | [diff] [blame] | 1444 | memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1445 | |
Chris Leech | 3fe9a0b | 2009-08-25 13:59:46 -0700 | [diff] [blame] | 1446 | if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN)) |
| 1447 | memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1448 | else |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame] | 1449 | memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1450 | |
| 1451 | hp = (struct fcoe_hdr *)(eh + 1); |
| 1452 | memset(hp, 0, sizeof(*hp)); |
| 1453 | if (FC_FCOE_VER) |
| 1454 | FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); |
| 1455 | hp->fcoe_sof = sof; |
| 1456 | |
Yi Zou | 39ca9a0 | 2009-02-27 14:07:15 -0800 | [diff] [blame] | 1457 | /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1458 | if (lport->seq_offload && fr_max_payload(fp)) { |
Yi Zou | 39ca9a0 | 2009-02-27 14:07:15 -0800 | [diff] [blame] | 1459 | skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; |
| 1460 | skb_shinfo(skb)->gso_size = fr_max_payload(fp); |
| 1461 | } else { |
| 1462 | skb_shinfo(skb)->gso_type = 0; |
| 1463 | skb_shinfo(skb)->gso_size = 0; |
| 1464 | } |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1465 | /* update tx stats: regardless if LLD fails */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1466 | stats = fc_lport_get_stats(lport); |
Robert Love | 582b45b | 2009-03-31 15:51:50 -0700 | [diff] [blame] | 1467 | stats->TxFrames++; |
| 1468 | stats->TxWords += wlen; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1469 | |
| 1470 | /* send down to lld */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1471 | fr_dev(fp) = lport; |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1472 | if (port->fcoe_pending_queue.qlen) |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1473 | fcoe_check_wait_queue(lport, skb); |
Vasu Dev | 4bb6b51 | 2009-05-06 10:52:34 -0700 | [diff] [blame] | 1474 | else if (fcoe_start_io(skb)) |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1475 | fcoe_check_wait_queue(lport, skb); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1476 | |
| 1477 | return 0; |
| 1478 | } |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1479 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 1480 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1481 | * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion |
| 1482 | * @skb: The completed skb (argument required by destructor) |
Joe Eykholt | e7a5199 | 2009-08-25 14:04:08 -0700 | [diff] [blame] | 1483 | */ |
| 1484 | static void fcoe_percpu_flush_done(struct sk_buff *skb) |
| 1485 | { |
| 1486 | complete(&fcoe_flush_completion); |
| 1487 | } |
| 1488 | |
| 1489 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1490 | * fcoe_percpu_receive_thread() - The per-CPU packet receive thread |
| 1491 | * @arg: The per-CPU context |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1492 | * |
| 1493 | * Return: 0 for success |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1494 | */ |
| 1495 | int fcoe_percpu_receive_thread(void *arg) |
| 1496 | { |
| 1497 | struct fcoe_percpu_s *p = arg; |
| 1498 | u32 fr_len; |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1499 | struct fc_lport *lport; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1500 | struct fcoe_rcv_info *fr; |
| 1501 | struct fcoe_dev_stats *stats; |
| 1502 | struct fc_frame_header *fh; |
| 1503 | struct sk_buff *skb; |
| 1504 | struct fcoe_crc_eof crc_eof; |
| 1505 | struct fc_frame *fp; |
| 1506 | u8 *mac = NULL; |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1507 | struct fcoe_port *port; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1508 | struct fcoe_hdr *hp; |
| 1509 | |
Robert Love | 4469c19 | 2009-02-27 10:56:38 -0800 | [diff] [blame] | 1510 | set_user_nice(current, -20); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1511 | |
| 1512 | while (!kthread_should_stop()) { |
| 1513 | |
| 1514 | spin_lock_bh(&p->fcoe_rx_list.lock); |
| 1515 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) { |
| 1516 | set_current_state(TASK_INTERRUPTIBLE); |
| 1517 | spin_unlock_bh(&p->fcoe_rx_list.lock); |
| 1518 | schedule(); |
| 1519 | set_current_state(TASK_RUNNING); |
| 1520 | if (kthread_should_stop()) |
| 1521 | return 0; |
| 1522 | spin_lock_bh(&p->fcoe_rx_list.lock); |
| 1523 | } |
| 1524 | spin_unlock_bh(&p->fcoe_rx_list.lock); |
| 1525 | fr = fcoe_dev_from_skb(skb); |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1526 | lport = fr->fr_dev; |
| 1527 | if (unlikely(!lport)) { |
Joe Eykholt | e7a5199 | 2009-08-25 14:04:08 -0700 | [diff] [blame] | 1528 | if (skb->destructor != fcoe_percpu_flush_done) |
| 1529 | FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb"); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1530 | kfree_skb(skb); |
| 1531 | continue; |
| 1532 | } |
| 1533 | |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 1534 | FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d " |
| 1535 | "head:%p data:%p tail:%p end:%p sum:%d dev:%s", |
| 1536 | skb->len, skb->data_len, |
| 1537 | skb->head, skb->data, skb_tail_pointer(skb), |
| 1538 | skb_end_pointer(skb), skb->csum, |
| 1539 | skb->dev ? skb->dev->name : "<NULL>"); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1540 | |
| 1541 | /* |
| 1542 | * Save source MAC address before discarding header. |
| 1543 | */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1544 | port = lport_priv(lport); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1545 | if (skb_is_nonlinear(skb)) |
| 1546 | skb_linearize(skb); /* not ideal */ |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1547 | mac = eth_hdr(skb)->h_source; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1548 | |
| 1549 | /* |
| 1550 | * Frame length checks and setting up the header pointers |
| 1551 | * was done in fcoe_rcv already. |
| 1552 | */ |
| 1553 | hp = (struct fcoe_hdr *) skb_network_header(skb); |
| 1554 | fh = (struct fc_frame_header *) skb_transport_header(skb); |
| 1555 | |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1556 | stats = fc_lport_get_stats(lport); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1557 | if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { |
Robert Love | 582b45b | 2009-03-31 15:51:50 -0700 | [diff] [blame] | 1558 | if (stats->ErrorFrames < 5) |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 1559 | printk(KERN_WARNING "fcoe: FCoE version " |
Robert Love | 582b45b | 2009-03-31 15:51:50 -0700 | [diff] [blame] | 1560 | "mismatch: The frame has " |
| 1561 | "version %x, but the " |
| 1562 | "initiator supports version " |
| 1563 | "%x\n", FC_FCOE_DECAPS_VER(hp), |
| 1564 | FC_FCOE_VER); |
| 1565 | stats->ErrorFrames++; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1566 | kfree_skb(skb); |
| 1567 | continue; |
| 1568 | } |
| 1569 | |
| 1570 | skb_pull(skb, sizeof(struct fcoe_hdr)); |
| 1571 | fr_len = skb->len - sizeof(struct fcoe_crc_eof); |
| 1572 | |
Robert Love | 582b45b | 2009-03-31 15:51:50 -0700 | [diff] [blame] | 1573 | stats->RxFrames++; |
| 1574 | stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1575 | |
| 1576 | fp = (struct fc_frame *)skb; |
| 1577 | fc_frame_init(fp); |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1578 | fr_dev(fp) = lport; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1579 | fr_sof(fp) = hp->fcoe_sof; |
| 1580 | |
| 1581 | /* Copy out the CRC and EOF trailer for access */ |
| 1582 | if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) { |
| 1583 | kfree_skb(skb); |
| 1584 | continue; |
| 1585 | } |
| 1586 | fr_eof(fp) = crc_eof.fcoe_eof; |
| 1587 | fr_crc(fp) = crc_eof.fcoe_crc32; |
| 1588 | if (pskb_trim(skb, fr_len)) { |
| 1589 | kfree_skb(skb); |
| 1590 | continue; |
| 1591 | } |
| 1592 | |
| 1593 | /* |
| 1594 | * We only check CRC if no offload is available and if it is |
| 1595 | * it's solicited data, in which case, the FCP layer would |
| 1596 | * check it during the copy. |
| 1597 | */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1598 | if (lport->crc_offload && |
| 1599 | skb->ip_summed == CHECKSUM_UNNECESSARY) |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1600 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; |
| 1601 | else |
| 1602 | fr_flags(fp) |= FCPHF_CRC_UNCHECKED; |
| 1603 | |
| 1604 | fh = fc_frame_header_get(fp); |
| 1605 | if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && |
| 1606 | fh->fh_type == FC_TYPE_FCP) { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1607 | fc_exch_recv(lport, fp); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1608 | continue; |
| 1609 | } |
| 1610 | if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) { |
| 1611 | if (le32_to_cpu(fr_crc(fp)) != |
| 1612 | ~crc32(~0, skb->data, fr_len)) { |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 1613 | if (stats->InvalidCRCCount < 5) |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1614 | printk(KERN_WARNING "fcoe: dropping " |
| 1615 | "frame with CRC error\n"); |
| 1616 | stats->InvalidCRCCount++; |
| 1617 | stats->ErrorFrames++; |
| 1618 | fc_frame_free(fp); |
| 1619 | continue; |
| 1620 | } |
| 1621 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; |
| 1622 | } |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1623 | fc_exch_recv(lport, fp); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1624 | } |
| 1625 | return 0; |
| 1626 | } |
| 1627 | |
| 1628 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1629 | * fcoe_check_wait_queue() - Attempt to clear the transmit backlog |
| 1630 | * @lport: The local port whose backlog is to be cleared |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1631 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1632 | * This empties the wait_queue, dequeues the head of the wait_queue queue |
| 1633 | * and calls fcoe_start_io() for each packet. If all skb have been |
| 1634 | * transmitted it returns the qlen. If an error occurs it restores |
| 1635 | * wait_queue (to try again later) and returns -1. |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1636 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1637 | * The wait_queue is used when the skb transmit fails. The failed skb |
| 1638 | * will go in the wait_queue which will be emptied by the timer function or |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1639 | * by the next skb transmit. |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 1640 | */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1641 | static void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb) |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1642 | { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1643 | struct fcoe_port *port = lport_priv(lport); |
Vasu Dev | 4bb6b51 | 2009-05-06 10:52:34 -0700 | [diff] [blame] | 1644 | int rc; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1645 | |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1646 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
Vasu Dev | 4bb6b51 | 2009-05-06 10:52:34 -0700 | [diff] [blame] | 1647 | |
| 1648 | if (skb) |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1649 | __skb_queue_tail(&port->fcoe_pending_queue, skb); |
Vasu Dev | 4bb6b51 | 2009-05-06 10:52:34 -0700 | [diff] [blame] | 1650 | |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1651 | if (port->fcoe_pending_queue_active) |
Vasu Dev | c826a31 | 2009-02-27 10:56:27 -0800 | [diff] [blame] | 1652 | goto out; |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1653 | port->fcoe_pending_queue_active = 1; |
Chris Leech | 55c8baf | 2009-02-27 10:56:32 -0800 | [diff] [blame] | 1654 | |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1655 | while (port->fcoe_pending_queue.qlen) { |
Chris Leech | 55c8baf | 2009-02-27 10:56:32 -0800 | [diff] [blame] | 1656 | /* keep qlen > 0 until fcoe_start_io succeeds */ |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1657 | port->fcoe_pending_queue.qlen++; |
| 1658 | skb = __skb_dequeue(&port->fcoe_pending_queue); |
Chris Leech | 55c8baf | 2009-02-27 10:56:32 -0800 | [diff] [blame] | 1659 | |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1660 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
Chris Leech | 55c8baf | 2009-02-27 10:56:32 -0800 | [diff] [blame] | 1661 | rc = fcoe_start_io(skb); |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1662 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
Chris Leech | 55c8baf | 2009-02-27 10:56:32 -0800 | [diff] [blame] | 1663 | |
| 1664 | if (rc) { |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1665 | __skb_queue_head(&port->fcoe_pending_queue, skb); |
Chris Leech | 55c8baf | 2009-02-27 10:56:32 -0800 | [diff] [blame] | 1666 | /* undo temporary increment above */ |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1667 | port->fcoe_pending_queue.qlen--; |
Chris Leech | 55c8baf | 2009-02-27 10:56:32 -0800 | [diff] [blame] | 1668 | break; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1669 | } |
Chris Leech | 55c8baf | 2009-02-27 10:56:32 -0800 | [diff] [blame] | 1670 | /* undo temporary increment above */ |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1671 | port->fcoe_pending_queue.qlen--; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1672 | } |
Chris Leech | 55c8baf | 2009-02-27 10:56:32 -0800 | [diff] [blame] | 1673 | |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1674 | if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH) |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1675 | lport->qfull = 0; |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1676 | if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer)) |
| 1677 | mod_timer(&port->timer, jiffies + 2); |
| 1678 | port->fcoe_pending_queue_active = 0; |
Vasu Dev | c826a31 | 2009-02-27 10:56:27 -0800 | [diff] [blame] | 1679 | out: |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1680 | if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH) |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1681 | lport->qfull = 1; |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1682 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
Vasu Dev | 4bb6b51 | 2009-05-06 10:52:34 -0700 | [diff] [blame] | 1683 | return; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1684 | } |
| 1685 | |
| 1686 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1687 | * fcoe_dev_setup() - Setup the link change notification interface |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 1688 | */ |
Randy Dunlap | b0d428a | 2009-04-27 21:49:31 -0700 | [diff] [blame] | 1689 | static void fcoe_dev_setup(void) |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1690 | { |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1691 | register_netdevice_notifier(&fcoe_notifier); |
| 1692 | } |
| 1693 | |
| 1694 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1695 | * fcoe_dev_cleanup() - Cleanup the link change notification interface |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 1696 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1697 | static void fcoe_dev_cleanup(void) |
| 1698 | { |
| 1699 | unregister_netdevice_notifier(&fcoe_notifier); |
| 1700 | } |
| 1701 | |
| 1702 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1703 | * fcoe_device_notification() - Handler for net device events |
| 1704 | * @notifier: The context of the notification |
| 1705 | * @event: The type of event |
| 1706 | * @ptr: The net device that the event was on |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1707 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1708 | * This function is called by the Ethernet driver in case of link change event. |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1709 | * |
| 1710 | * Returns: 0 for success |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 1711 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1712 | static int fcoe_device_notification(struct notifier_block *notifier, |
| 1713 | ulong event, void *ptr) |
| 1714 | { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1715 | struct fc_lport *lport = NULL; |
Vasu Dev | 1d1b88d | 2009-07-29 17:05:45 -0700 | [diff] [blame] | 1716 | struct net_device *netdev = ptr; |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1717 | struct fcoe_interface *fcoe; |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 1718 | struct fcoe_port *port; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1719 | struct fcoe_dev_stats *stats; |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1720 | u32 link_possible = 1; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1721 | u32 mfs; |
| 1722 | int rc = NOTIFY_OK; |
| 1723 | |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 1724 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
Chris Leech | 2502498 | 2009-08-25 13:59:35 -0700 | [diff] [blame] | 1725 | if (fcoe->netdev == netdev) { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1726 | lport = fcoe->ctlr.lp; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1727 | break; |
| 1728 | } |
| 1729 | } |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1730 | if (!lport) { |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1731 | rc = NOTIFY_DONE; |
| 1732 | goto out; |
| 1733 | } |
| 1734 | |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1735 | switch (event) { |
| 1736 | case NETDEV_DOWN: |
| 1737 | case NETDEV_GOING_DOWN: |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1738 | link_possible = 0; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1739 | break; |
| 1740 | case NETDEV_UP: |
| 1741 | case NETDEV_CHANGE: |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1742 | break; |
| 1743 | case NETDEV_CHANGEMTU: |
Yi Zou | 7221d7e | 2009-10-21 16:27:52 -0700 | [diff] [blame] | 1744 | if (netdev->features & NETIF_F_FCOE_MTU) |
| 1745 | break; |
Vasu Dev | 1d1b88d | 2009-07-29 17:05:45 -0700 | [diff] [blame] | 1746 | mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + |
| 1747 | sizeof(struct fcoe_crc_eof)); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1748 | if (mfs >= FC_MIN_MAX_FRAME) |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1749 | fc_set_mfs(lport, mfs); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1750 | break; |
| 1751 | case NETDEV_REGISTER: |
| 1752 | break; |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 1753 | case NETDEV_UNREGISTER: |
| 1754 | list_del(&fcoe->list); |
| 1755 | port = lport_priv(fcoe->ctlr.lp); |
| 1756 | fcoe_interface_cleanup(fcoe); |
| 1757 | schedule_work(&port->destroy_work); |
| 1758 | goto out; |
| 1759 | break; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1760 | default: |
Vasu Dev | 1d1b88d | 2009-07-29 17:05:45 -0700 | [diff] [blame] | 1761 | FCOE_NETDEV_DBG(netdev, "Unknown event %ld " |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 1762 | "from netdev netlink\n", event); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1763 | } |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1764 | if (link_possible && !fcoe_link_ok(lport)) |
Chris Leech | 3fe9a0b | 2009-08-25 13:59:46 -0700 | [diff] [blame] | 1765 | fcoe_ctlr_link_up(&fcoe->ctlr); |
| 1766 | else if (fcoe_ctlr_link_down(&fcoe->ctlr)) { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1767 | stats = fc_lport_get_stats(lport); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1768 | stats->LinkFailureCount++; |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1769 | fcoe_clean_pending_queue(lport); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1770 | } |
| 1771 | out: |
| 1772 | return rc; |
| 1773 | } |
| 1774 | |
| 1775 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1776 | * fcoe_if_to_netdev() - Parse a name buffer to get a net device |
| 1777 | * @buffer: The name of the net device |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1778 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1779 | * Returns: NULL or a ptr to net_device |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 1780 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1781 | static struct net_device *fcoe_if_to_netdev(const char *buffer) |
| 1782 | { |
| 1783 | char *cp; |
| 1784 | char ifname[IFNAMSIZ + 2]; |
| 1785 | |
| 1786 | if (buffer) { |
| 1787 | strlcpy(ifname, buffer, IFNAMSIZ); |
| 1788 | cp = ifname + strlen(ifname); |
| 1789 | while (--cp >= ifname && *cp == '\n') |
| 1790 | *cp = '\0'; |
| 1791 | return dev_get_by_name(&init_net, ifname); |
| 1792 | } |
| 1793 | return NULL; |
| 1794 | } |
| 1795 | |
| 1796 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1797 | * fcoe_destroy() - Destroy a FCoE interface |
| 1798 | * @buffer: The name of the Ethernet interface to be destroyed |
| 1799 | * @kp: The associated kernel parameter |
| 1800 | * |
| 1801 | * Called from sysfs. |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1802 | * |
| 1803 | * Returns: 0 for success |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 1804 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1805 | static int fcoe_destroy(const char *buffer, struct kernel_param *kp) |
| 1806 | { |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 1807 | struct fcoe_interface *fcoe; |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 1808 | struct net_device *netdev; |
Mike Christie | 8eca355 | 2009-10-21 16:27:44 -0700 | [diff] [blame] | 1809 | int rc = 0; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1810 | |
Chris Leech | dfc1d0f | 2009-08-25 14:00:13 -0700 | [diff] [blame] | 1811 | mutex_lock(&fcoe_config_mutex); |
| 1812 | #ifdef CONFIG_FCOE_MODULE |
| 1813 | /* |
| 1814 | * Make sure the module has been initialized, and is not about to be |
| 1815 | * removed. Module paramter sysfs files are writable before the |
| 1816 | * module_init function is called and after module_exit. |
| 1817 | */ |
| 1818 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { |
| 1819 | rc = -ENODEV; |
| 1820 | goto out_nodev; |
| 1821 | } |
| 1822 | #endif |
| 1823 | |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1824 | netdev = fcoe_if_to_netdev(buffer); |
| 1825 | if (!netdev) { |
| 1826 | rc = -ENODEV; |
| 1827 | goto out_nodev; |
| 1828 | } |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 1829 | |
Chris Leech | 090eb6c | 2009-08-25 14:00:28 -0700 | [diff] [blame] | 1830 | rtnl_lock(); |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 1831 | fcoe = fcoe_hostlist_lookup_port(netdev); |
| 1832 | if (!fcoe) { |
Chris Leech | 090eb6c | 2009-08-25 14:00:28 -0700 | [diff] [blame] | 1833 | rtnl_unlock(); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1834 | rc = -ENODEV; |
| 1835 | goto out_putdev; |
| 1836 | } |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 1837 | list_del(&fcoe->list); |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 1838 | fcoe_interface_cleanup(fcoe); |
| 1839 | rtnl_unlock(); |
| 1840 | fcoe_if_destroy(fcoe->ctlr.lp); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1841 | out_putdev: |
| 1842 | dev_put(netdev); |
| 1843 | out_nodev: |
Chris Leech | dfc1d0f | 2009-08-25 14:00:13 -0700 | [diff] [blame] | 1844 | mutex_unlock(&fcoe_config_mutex); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1845 | return rc; |
| 1846 | } |
| 1847 | |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1848 | /** |
| 1849 | * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context |
| 1850 | * @work: Handle to the FCoE port to be destroyed |
| 1851 | */ |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 1852 | static void fcoe_destroy_work(struct work_struct *work) |
| 1853 | { |
| 1854 | struct fcoe_port *port; |
| 1855 | |
| 1856 | port = container_of(work, struct fcoe_port, destroy_work); |
| 1857 | mutex_lock(&fcoe_config_mutex); |
| 1858 | fcoe_if_destroy(port->lport); |
| 1859 | mutex_unlock(&fcoe_config_mutex); |
| 1860 | } |
| 1861 | |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1862 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1863 | * fcoe_create() - Create a fcoe interface |
| 1864 | * @buffer: The name of the Ethernet interface to create on |
| 1865 | * @kp: The associated kernel param |
| 1866 | * |
| 1867 | * Called from sysfs. |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1868 | * |
| 1869 | * Returns: 0 for success |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 1870 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1871 | static int fcoe_create(const char *buffer, struct kernel_param *kp) |
| 1872 | { |
| 1873 | int rc; |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 1874 | struct fcoe_interface *fcoe; |
Chris Leech | af7f85d | 2009-08-25 13:59:24 -0700 | [diff] [blame] | 1875 | struct fc_lport *lport; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1876 | struct net_device *netdev; |
| 1877 | |
Chris Leech | dfc1d0f | 2009-08-25 14:00:13 -0700 | [diff] [blame] | 1878 | mutex_lock(&fcoe_config_mutex); |
| 1879 | #ifdef CONFIG_FCOE_MODULE |
| 1880 | /* |
| 1881 | * Make sure the module has been initialized, and is not about to be |
| 1882 | * removed. Module paramter sysfs files are writable before the |
| 1883 | * module_init function is called and after module_exit. |
| 1884 | */ |
| 1885 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { |
| 1886 | rc = -ENODEV; |
| 1887 | goto out_nodev; |
| 1888 | } |
| 1889 | #endif |
| 1890 | |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 1891 | rtnl_lock(); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1892 | netdev = fcoe_if_to_netdev(buffer); |
| 1893 | if (!netdev) { |
| 1894 | rc = -ENODEV; |
| 1895 | goto out_nodev; |
| 1896 | } |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 1897 | |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1898 | /* look for existing lport */ |
| 1899 | if (fcoe_hostlist_lookup(netdev)) { |
| 1900 | rc = -EEXIST; |
| 1901 | goto out_putdev; |
| 1902 | } |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1903 | |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 1904 | fcoe = fcoe_interface_create(netdev); |
| 1905 | if (!fcoe) { |
| 1906 | rc = -ENOMEM; |
| 1907 | goto out_putdev; |
| 1908 | } |
| 1909 | |
Chris Leech | 9a05753 | 2009-11-03 11:46:40 -0800 | [diff] [blame] | 1910 | lport = fcoe_if_create(fcoe, &netdev->dev, 0); |
Chris Leech | af7f85d | 2009-08-25 13:59:24 -0700 | [diff] [blame] | 1911 | if (IS_ERR(lport)) { |
Robert Love | d5488eb | 2009-06-10 15:30:59 -0700 | [diff] [blame] | 1912 | printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1913 | netdev->name); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1914 | rc = -EIO; |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 1915 | fcoe_interface_cleanup(fcoe); |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 1916 | goto out_free; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1917 | } |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 1918 | |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 1919 | /* Make this the "master" N_Port */ |
| 1920 | fcoe->ctlr.lp = lport; |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 1921 | |
Chris Leech | c863df3 | 2009-08-25 14:00:18 -0700 | [diff] [blame] | 1922 | /* add to lports list */ |
| 1923 | fcoe_hostlist_add(lport); |
| 1924 | |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 1925 | /* start FIP Discovery and FLOGI */ |
| 1926 | lport->boot_time = jiffies; |
| 1927 | fc_fabric_login(lport); |
| 1928 | if (!fcoe_link_ok(lport)) |
| 1929 | fcoe_ctlr_link_up(&fcoe->ctlr); |
| 1930 | |
| 1931 | rc = 0; |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 1932 | out_free: |
Chris Leech | 54b649f | 2009-08-25 14:00:07 -0700 | [diff] [blame] | 1933 | /* |
| 1934 | * Release from init in fcoe_interface_create(), on success lport |
| 1935 | * should be holding a reference taken in fcoe_if_create(). |
| 1936 | */ |
Chris Leech | 030f4e0 | 2009-08-25 14:00:02 -0700 | [diff] [blame] | 1937 | fcoe_interface_put(fcoe); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1938 | out_putdev: |
| 1939 | dev_put(netdev); |
| 1940 | out_nodev: |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 1941 | rtnl_unlock(); |
Chris Leech | dfc1d0f | 2009-08-25 14:00:13 -0700 | [diff] [blame] | 1942 | mutex_unlock(&fcoe_config_mutex); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1943 | return rc; |
| 1944 | } |
| 1945 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 1946 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1947 | * fcoe_link_ok() - Check if the link is OK for a local port |
| 1948 | * @lport: The local port to check link on |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1949 | * |
| 1950 | * Any permanently-disqualifying conditions have been previously checked. |
| 1951 | * This also updates the speed setting, which may change with link for 100/1000. |
| 1952 | * |
| 1953 | * This function should probably be checking for PAUSE support at some point |
| 1954 | * in the future. Currently Per-priority-pause is not determinable using |
| 1955 | * ethtool, so we shouldn't be restrictive until that problem is resolved. |
| 1956 | * |
| 1957 | * Returns: 0 if link is OK for use by FCoE. |
| 1958 | * |
| 1959 | */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1960 | int fcoe_link_ok(struct fc_lport *lport) |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1961 | { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1962 | struct fcoe_port *port = lport_priv(lport); |
| 1963 | struct net_device *netdev = port->fcoe->netdev; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1964 | struct ethtool_cmd ecmd = { ETHTOOL_GSET }; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1965 | |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1966 | if ((netdev->flags & IFF_UP) && netif_carrier_ok(netdev) && |
| 1967 | (!dev_ethtool_get_settings(netdev, &ecmd))) { |
| 1968 | lport->link_supported_speeds &= |
Yi Zou | 2f718d6 | 2009-07-29 17:04:01 -0700 | [diff] [blame] | 1969 | ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT); |
| 1970 | if (ecmd.supported & (SUPPORTED_1000baseT_Half | |
| 1971 | SUPPORTED_1000baseT_Full)) |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1972 | lport->link_supported_speeds |= FC_PORTSPEED_1GBIT; |
Yi Zou | 2f718d6 | 2009-07-29 17:04:01 -0700 | [diff] [blame] | 1973 | if (ecmd.supported & SUPPORTED_10000baseT_Full) |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1974 | lport->link_supported_speeds |= |
Yi Zou | 2f718d6 | 2009-07-29 17:04:01 -0700 | [diff] [blame] | 1975 | FC_PORTSPEED_10GBIT; |
| 1976 | if (ecmd.speed == SPEED_1000) |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1977 | lport->link_speed = FC_PORTSPEED_1GBIT; |
Yi Zou | 2f718d6 | 2009-07-29 17:04:01 -0700 | [diff] [blame] | 1978 | if (ecmd.speed == SPEED_10000) |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1979 | lport->link_speed = FC_PORTSPEED_10GBIT; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1980 | |
Yi Zou | 2f718d6 | 2009-07-29 17:04:01 -0700 | [diff] [blame] | 1981 | return 0; |
| 1982 | } |
| 1983 | return -1; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1984 | } |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1985 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 1986 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1987 | * fcoe_percpu_clean() - Clear all pending skbs for an local port |
| 1988 | * @lport: The local port whose skbs are to be cleared |
Joe Eykholt | e7a5199 | 2009-08-25 14:04:08 -0700 | [diff] [blame] | 1989 | * |
| 1990 | * Must be called with fcoe_create_mutex held to single-thread completion. |
| 1991 | * |
| 1992 | * This flushes the pending skbs by adding a new skb to each queue and |
| 1993 | * waiting until they are all freed. This assures us that not only are |
| 1994 | * there no packets that will be handled by the lport, but also that any |
| 1995 | * threads already handling packet have returned. |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1996 | */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 1997 | void fcoe_percpu_clean(struct fc_lport *lport) |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1998 | { |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 1999 | struct fcoe_percpu_s *pp; |
| 2000 | struct fcoe_rcv_info *fr; |
| 2001 | struct sk_buff_head *list; |
| 2002 | struct sk_buff *skb, *next; |
| 2003 | struct sk_buff *head; |
Robert Love | 5e5e92d | 2009-03-17 11:41:35 -0700 | [diff] [blame] | 2004 | unsigned int cpu; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2005 | |
Robert Love | 5e5e92d | 2009-03-17 11:41:35 -0700 | [diff] [blame] | 2006 | for_each_possible_cpu(cpu) { |
| 2007 | pp = &per_cpu(fcoe_percpu, cpu); |
| 2008 | spin_lock_bh(&pp->fcoe_rx_list.lock); |
| 2009 | list = &pp->fcoe_rx_list; |
| 2010 | head = list->next; |
| 2011 | for (skb = head; skb != (struct sk_buff *)list; |
| 2012 | skb = next) { |
| 2013 | next = skb->next; |
| 2014 | fr = fcoe_dev_from_skb(skb); |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 2015 | if (fr->fr_dev == lport) { |
Robert Love | 5e5e92d | 2009-03-17 11:41:35 -0700 | [diff] [blame] | 2016 | __skb_unlink(skb, list); |
| 2017 | kfree_skb(skb); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2018 | } |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2019 | } |
Joe Eykholt | e7a5199 | 2009-08-25 14:04:08 -0700 | [diff] [blame] | 2020 | |
| 2021 | if (!pp->thread || !cpu_online(cpu)) { |
| 2022 | spin_unlock_bh(&pp->fcoe_rx_list.lock); |
| 2023 | continue; |
| 2024 | } |
| 2025 | |
| 2026 | skb = dev_alloc_skb(0); |
| 2027 | if (!skb) { |
| 2028 | spin_unlock_bh(&pp->fcoe_rx_list.lock); |
| 2029 | continue; |
| 2030 | } |
| 2031 | skb->destructor = fcoe_percpu_flush_done; |
| 2032 | |
| 2033 | __skb_queue_tail(&pp->fcoe_rx_list, skb); |
| 2034 | if (pp->fcoe_rx_list.qlen == 1) |
| 2035 | wake_up_process(pp->thread); |
Robert Love | 5e5e92d | 2009-03-17 11:41:35 -0700 | [diff] [blame] | 2036 | spin_unlock_bh(&pp->fcoe_rx_list.lock); |
Joe Eykholt | e7a5199 | 2009-08-25 14:04:08 -0700 | [diff] [blame] | 2037 | |
| 2038 | wait_for_completion(&fcoe_flush_completion); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2039 | } |
| 2040 | } |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2041 | |
| 2042 | /** |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 2043 | * fcoe_clean_pending_queue() - Dequeue a skb and free it |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 2044 | * @lport: The local port to dequeue a skb on |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 2045 | */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 2046 | void fcoe_clean_pending_queue(struct fc_lport *lport) |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2047 | { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 2048 | struct fcoe_port *port = lport_priv(lport); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2049 | struct sk_buff *skb; |
| 2050 | |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 2051 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
| 2052 | while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) { |
| 2053 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2054 | kfree_skb(skb); |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 2055 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2056 | } |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 2057 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2058 | } |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2059 | |
| 2060 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 2061 | * fcoe_reset() - Reset a local port |
| 2062 | * @shost: The SCSI host associated with the local port to be reset |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2063 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 2064 | * Returns: Always 0 (return value required by FC transport template) |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2065 | */ |
| 2066 | int fcoe_reset(struct Scsi_Host *shost) |
| 2067 | { |
| 2068 | struct fc_lport *lport = shost_priv(shost); |
| 2069 | fc_lport_reset(lport); |
| 2070 | return 0; |
| 2071 | } |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2072 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 2073 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 2074 | * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device |
| 2075 | * @netdev: The net device used as a key |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2076 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 2077 | * Locking: Must be called with the RNL mutex held. |
| 2078 | * |
| 2079 | * Returns: NULL or the FCoE interface |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2080 | */ |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 2081 | static struct fcoe_interface * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 2082 | fcoe_hostlist_lookup_port(const struct net_device *netdev) |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2083 | { |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 2084 | struct fcoe_interface *fcoe; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2085 | |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 2086 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 2087 | if (fcoe->netdev == netdev) |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 2088 | return fcoe; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2089 | } |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2090 | return NULL; |
| 2091 | } |
| 2092 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 2093 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 2094 | * fcoe_hostlist_lookup() - Find the local port associated with a |
| 2095 | * given net device |
| 2096 | * @netdev: The netdevice used as a key |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2097 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 2098 | * Locking: Must be called with the RTNL mutex held |
| 2099 | * |
| 2100 | * Returns: NULL or the local port |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2101 | */ |
Chris Leech | 090eb6c | 2009-08-25 14:00:28 -0700 | [diff] [blame] | 2102 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2103 | { |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 2104 | struct fcoe_interface *fcoe; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2105 | |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 2106 | fcoe = fcoe_hostlist_lookup_port(netdev); |
Chris Leech | 3fe9a0b | 2009-08-25 13:59:46 -0700 | [diff] [blame] | 2107 | return (fcoe) ? fcoe->ctlr.lp : NULL; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2108 | } |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2109 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 2110 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 2111 | * fcoe_hostlist_add() - Add the FCoE interface identified by a local |
| 2112 | * port to the hostlist |
| 2113 | * @lport: The local port that identifies the FCoE interface to be added |
| 2114 | * |
| 2115 | * Locking: must be called with the RTNL mutex held |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2116 | * |
| 2117 | * Returns: 0 for success |
| 2118 | */ |
Chris Leech | 090eb6c | 2009-08-25 14:00:28 -0700 | [diff] [blame] | 2119 | static int fcoe_hostlist_add(const struct fc_lport *lport) |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2120 | { |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 2121 | struct fcoe_interface *fcoe; |
| 2122 | struct fcoe_port *port; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2123 | |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 2124 | fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); |
| 2125 | if (!fcoe) { |
| 2126 | port = lport_priv(lport); |
| 2127 | fcoe = port->fcoe; |
| 2128 | list_add_tail(&fcoe->list, &fcoe_hostlist); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2129 | } |
| 2130 | return 0; |
| 2131 | } |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2132 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 2133 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 2134 | * fcoe_init() - Initialize fcoe.ko |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2135 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 2136 | * Returns: 0 on success, or a negative value on failure |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 2137 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2138 | static int __init fcoe_init(void) |
| 2139 | { |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 2140 | struct fcoe_percpu_s *p; |
Robert Love | 38eccab | 2009-03-17 11:41:30 -0700 | [diff] [blame] | 2141 | unsigned int cpu; |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 2142 | int rc = 0; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2143 | |
Chris Leech | dfc1d0f | 2009-08-25 14:00:13 -0700 | [diff] [blame] | 2144 | mutex_lock(&fcoe_config_mutex); |
| 2145 | |
Robert Love | 38eccab | 2009-03-17 11:41:30 -0700 | [diff] [blame] | 2146 | for_each_possible_cpu(cpu) { |
Robert Love | 5e5e92d | 2009-03-17 11:41:35 -0700 | [diff] [blame] | 2147 | p = &per_cpu(fcoe_percpu, cpu); |
Robert Love | 38eccab | 2009-03-17 11:41:30 -0700 | [diff] [blame] | 2148 | skb_queue_head_init(&p->fcoe_rx_list); |
| 2149 | } |
| 2150 | |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 2151 | for_each_online_cpu(cpu) |
| 2152 | fcoe_percpu_thread_create(cpu); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2153 | |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 2154 | /* Initialize per CPU interrupt thread */ |
| 2155 | rc = register_hotcpu_notifier(&fcoe_cpu_notifier); |
| 2156 | if (rc) |
| 2157 | goto out_free; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2158 | |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 2159 | /* Setup link change notification */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2160 | fcoe_dev_setup(); |
| 2161 | |
Chris Leech | 5892c32 | 2009-08-25 13:59:14 -0700 | [diff] [blame] | 2162 | rc = fcoe_if_init(); |
| 2163 | if (rc) |
| 2164 | goto out_free; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2165 | |
Chris Leech | dfc1d0f | 2009-08-25 14:00:13 -0700 | [diff] [blame] | 2166 | mutex_unlock(&fcoe_config_mutex); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2167 | return 0; |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 2168 | |
| 2169 | out_free: |
| 2170 | for_each_online_cpu(cpu) { |
| 2171 | fcoe_percpu_thread_destroy(cpu); |
| 2172 | } |
Chris Leech | dfc1d0f | 2009-08-25 14:00:13 -0700 | [diff] [blame] | 2173 | mutex_unlock(&fcoe_config_mutex); |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 2174 | return rc; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2175 | } |
| 2176 | module_init(fcoe_init); |
| 2177 | |
| 2178 | /** |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 2179 | * fcoe_exit() - Clean up fcoe.ko |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2180 | * |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 2181 | * Returns: 0 on success or a negative value on failure |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 2182 | */ |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2183 | static void __exit fcoe_exit(void) |
| 2184 | { |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 2185 | struct fcoe_interface *fcoe, *tmp; |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 2186 | struct fcoe_port *port; |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 2187 | unsigned int cpu; |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2188 | |
Chris Leech | dfc1d0f | 2009-08-25 14:00:13 -0700 | [diff] [blame] | 2189 | mutex_lock(&fcoe_config_mutex); |
| 2190 | |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2191 | fcoe_dev_cleanup(); |
| 2192 | |
Vasu Dev | 5919a59 | 2009-03-27 09:03:29 -0700 | [diff] [blame] | 2193 | /* releases the associated fcoe hosts */ |
Chris Leech | 090eb6c | 2009-08-25 14:00:28 -0700 | [diff] [blame] | 2194 | rtnl_lock(); |
| 2195 | list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { |
Chris Leech | c863df3 | 2009-08-25 14:00:18 -0700 | [diff] [blame] | 2196 | list_del(&fcoe->list); |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 2197 | port = lport_priv(fcoe->ctlr.lp); |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 2198 | fcoe_interface_cleanup(fcoe); |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 2199 | schedule_work(&port->destroy_work); |
Chris Leech | c863df3 | 2009-08-25 14:00:18 -0700 | [diff] [blame] | 2200 | } |
Chris Leech | 090eb6c | 2009-08-25 14:00:28 -0700 | [diff] [blame] | 2201 | rtnl_unlock(); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2202 | |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 2203 | unregister_hotcpu_notifier(&fcoe_cpu_notifier); |
| 2204 | |
Chris Leech | 014f5c3 | 2009-08-25 13:59:30 -0700 | [diff] [blame] | 2205 | for_each_online_cpu(cpu) |
Robert Love | 8976f42 | 2009-03-17 11:41:46 -0700 | [diff] [blame] | 2206 | fcoe_percpu_thread_destroy(cpu); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2207 | |
Chris Leech | dfc1d0f | 2009-08-25 14:00:13 -0700 | [diff] [blame] | 2208 | mutex_unlock(&fcoe_config_mutex); |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 2209 | |
| 2210 | /* flush any asyncronous interface destroys, |
| 2211 | * this should happen after the netdev notifier is unregistered */ |
| 2212 | flush_scheduled_work(); |
Chris Leech | 9a05753 | 2009-11-03 11:46:40 -0800 | [diff] [blame] | 2213 | /* That will flush out all the N_Ports on the hostlist, but now we |
| 2214 | * may have NPIV VN_Ports scheduled for destruction */ |
| 2215 | flush_scheduled_work(); |
Chris Leech | 2e70e24 | 2009-08-25 14:00:23 -0700 | [diff] [blame] | 2216 | |
| 2217 | /* detach from scsi transport |
| 2218 | * must happen after all destroys are done, therefor after the flush */ |
| 2219 | fcoe_if_exit(); |
Robert Love | 85b4aa4 | 2008-12-09 15:10:24 -0800 | [diff] [blame] | 2220 | } |
| 2221 | module_exit(fcoe_exit); |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame] | 2222 | |
| 2223 | /** |
| 2224 | * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler |
| 2225 | * @seq: active sequence in the FLOGI or FDISC exchange |
| 2226 | * @fp: response frame, or error encoded in a pointer (timeout) |
| 2227 | * @arg: pointer the the fcoe_ctlr structure |
| 2228 | * |
| 2229 | * This handles MAC address managment for FCoE, then passes control on to |
| 2230 | * the libfc FLOGI response handler. |
| 2231 | */ |
| 2232 | static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) |
| 2233 | { |
| 2234 | struct fcoe_ctlr *fip = arg; |
| 2235 | struct fc_exch *exch = fc_seq_exch(seq); |
| 2236 | struct fc_lport *lport = exch->lp; |
| 2237 | u8 *mac; |
| 2238 | |
| 2239 | if (IS_ERR(fp)) |
| 2240 | goto done; |
| 2241 | |
| 2242 | mac = fr_cb(fp)->granted_mac; |
| 2243 | if (is_zero_ether_addr(mac)) { |
| 2244 | /* pre-FIP */ |
| 2245 | mac = eth_hdr(&fp->skb)->h_source; |
| 2246 | if (fcoe_ctlr_recv_flogi(fip, lport, fp, mac)) { |
| 2247 | fc_frame_free(fp); |
| 2248 | return; |
| 2249 | } |
| 2250 | } else { |
| 2251 | /* FIP, libfcoe has already seen it */ |
| 2252 | fip->update_mac(lport, fr_cb(fp)->granted_mac); |
| 2253 | } |
| 2254 | done: |
| 2255 | fc_lport_flogi_resp(seq, fp, lport); |
| 2256 | } |
| 2257 | |
| 2258 | /** |
| 2259 | * fcoe_logo_resp() - FCoE specific LOGO response handler |
| 2260 | * @seq: active sequence in the LOGO exchange |
| 2261 | * @fp: response frame, or error encoded in a pointer (timeout) |
| 2262 | * @arg: pointer the the fcoe_ctlr structure |
| 2263 | * |
| 2264 | * This handles MAC address managment for FCoE, then passes control on to |
| 2265 | * the libfc LOGO response handler. |
| 2266 | */ |
| 2267 | static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) |
| 2268 | { |
| 2269 | struct fcoe_ctlr *fip = arg; |
| 2270 | struct fc_exch *exch = fc_seq_exch(seq); |
| 2271 | struct fc_lport *lport = exch->lp; |
| 2272 | static u8 zero_mac[ETH_ALEN] = { 0 }; |
| 2273 | |
| 2274 | if (!IS_ERR(fp)) |
| 2275 | fip->update_mac(lport, zero_mac); |
| 2276 | fc_lport_logo_resp(seq, fp, lport); |
| 2277 | } |
| 2278 | |
| 2279 | /** |
| 2280 | * fcoe_elsct_send - FCoE specific ELS handler |
| 2281 | * |
| 2282 | * This does special case handling of FIP encapsualted ELS exchanges for FCoE, |
| 2283 | * using FCoE specific response handlers and passing the FIP controller as |
| 2284 | * the argument (the lport is still available from the exchange). |
| 2285 | * |
| 2286 | * Most of the work here is just handed off to the libfc routine. |
| 2287 | */ |
Robert Love | 1875f27 | 2009-11-03 11:47:50 -0800 | [diff] [blame^] | 2288 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, |
| 2289 | struct fc_frame *fp, unsigned int op, |
| 2290 | void (*resp)(struct fc_seq *, |
| 2291 | struct fc_frame *, |
| 2292 | void *), |
| 2293 | void *arg, u32 timeout) |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame] | 2294 | { |
| 2295 | struct fcoe_port *port = lport_priv(lport); |
| 2296 | struct fcoe_interface *fcoe = port->fcoe; |
| 2297 | struct fcoe_ctlr *fip = &fcoe->ctlr; |
| 2298 | struct fc_frame_header *fh = fc_frame_header_get(fp); |
| 2299 | |
| 2300 | switch (op) { |
| 2301 | case ELS_FLOGI: |
| 2302 | case ELS_FDISC: |
| 2303 | return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, |
| 2304 | fip, timeout); |
| 2305 | case ELS_LOGO: |
| 2306 | /* only hook onto fabric logouts, not port logouts */ |
| 2307 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) |
| 2308 | break; |
| 2309 | return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, |
| 2310 | fip, timeout); |
| 2311 | } |
| 2312 | return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); |
| 2313 | } |
| 2314 | |
Chris Leech | 9a05753 | 2009-11-03 11:46:40 -0800 | [diff] [blame] | 2315 | /** |
| 2316 | * fcoe_vport_create() - create an fc_host/scsi_host for a vport |
| 2317 | * @vport: fc_vport object to create a new fc_host for |
| 2318 | * @disabled: start the new fc_host in a disabled state by default? |
| 2319 | * |
| 2320 | * Returns: 0 for success |
| 2321 | */ |
| 2322 | static int fcoe_vport_create(struct fc_vport *vport, bool disabled) |
| 2323 | { |
| 2324 | struct Scsi_Host *shost = vport_to_shost(vport); |
| 2325 | struct fc_lport *n_port = shost_priv(shost); |
| 2326 | struct fcoe_port *port = lport_priv(n_port); |
| 2327 | struct fcoe_interface *fcoe = port->fcoe; |
| 2328 | struct net_device *netdev = fcoe->netdev; |
| 2329 | struct fc_lport *vn_port; |
| 2330 | |
| 2331 | mutex_lock(&fcoe_config_mutex); |
| 2332 | vn_port = fcoe_if_create(fcoe, &vport->dev, 1); |
| 2333 | mutex_unlock(&fcoe_config_mutex); |
| 2334 | |
| 2335 | if (IS_ERR(vn_port)) { |
| 2336 | printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", |
| 2337 | netdev->name); |
| 2338 | return -EIO; |
| 2339 | } |
| 2340 | |
| 2341 | if (disabled) { |
| 2342 | fc_vport_set_state(vport, FC_VPORT_DISABLED); |
| 2343 | } else { |
| 2344 | vn_port->boot_time = jiffies; |
| 2345 | fc_fabric_login(vn_port); |
| 2346 | fc_vport_setlink(vn_port); |
| 2347 | } |
| 2348 | return 0; |
| 2349 | } |
| 2350 | |
| 2351 | /** |
| 2352 | * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport |
| 2353 | * @vport: fc_vport object that is being destroyed |
| 2354 | * |
| 2355 | * Returns: 0 for success |
| 2356 | */ |
| 2357 | static int fcoe_vport_destroy(struct fc_vport *vport) |
| 2358 | { |
| 2359 | struct Scsi_Host *shost = vport_to_shost(vport); |
| 2360 | struct fc_lport *n_port = shost_priv(shost); |
| 2361 | struct fc_lport *vn_port = vport->dd_data; |
| 2362 | struct fcoe_port *port = lport_priv(vn_port); |
| 2363 | |
| 2364 | mutex_lock(&n_port->lp_mutex); |
| 2365 | list_del(&vn_port->list); |
| 2366 | mutex_unlock(&n_port->lp_mutex); |
| 2367 | schedule_work(&port->destroy_work); |
| 2368 | return 0; |
| 2369 | } |
| 2370 | |
| 2371 | /** |
| 2372 | * fcoe_vport_disable() - change vport state |
| 2373 | * @vport: vport to bring online/offline |
| 2374 | * @disable: should the vport be disabled? |
| 2375 | */ |
| 2376 | static int fcoe_vport_disable(struct fc_vport *vport, bool disable) |
| 2377 | { |
| 2378 | struct fc_lport *lport = vport->dd_data; |
| 2379 | |
| 2380 | if (disable) { |
| 2381 | fc_vport_set_state(vport, FC_VPORT_DISABLED); |
| 2382 | fc_fabric_logoff(lport); |
| 2383 | } else { |
| 2384 | lport->boot_time = jiffies; |
| 2385 | fc_fabric_login(lport); |
| 2386 | fc_vport_setlink(lport); |
| 2387 | } |
| 2388 | |
| 2389 | return 0; |
| 2390 | } |
| 2391 | |
Chris Leech | dc8596d | 2009-11-03 11:47:18 -0800 | [diff] [blame] | 2392 | /** |
| 2393 | * fcoe_vport_set_symbolic_name() - append vport string to symbolic name |
| 2394 | * @vport: fc_vport with a new symbolic name string |
| 2395 | * |
| 2396 | * After generating a new symbolic name string, a new RSPN_ID request is |
| 2397 | * sent to the name server. There is no response handler, so if it fails |
| 2398 | * for some reason it will not be retried. |
| 2399 | */ |
| 2400 | static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) |
| 2401 | { |
| 2402 | struct fc_lport *lport = vport->dd_data; |
| 2403 | struct fc_frame *fp; |
| 2404 | size_t len; |
| 2405 | |
| 2406 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, |
| 2407 | "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, |
| 2408 | fcoe_netdev(lport)->name, vport->symbolic_name); |
| 2409 | |
| 2410 | if (lport->state != LPORT_ST_READY) |
| 2411 | return; |
| 2412 | |
| 2413 | len = strnlen(fc_host_symbolic_name(lport->host), 255); |
| 2414 | fp = fc_frame_alloc(lport, |
| 2415 | sizeof(struct fc_ct_hdr) + |
| 2416 | sizeof(struct fc_ns_rspn) + len); |
| 2417 | if (!fp) |
| 2418 | return; |
| 2419 | lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, |
| 2420 | NULL, NULL, lport->e_d_tov); |
| 2421 | } |