1a703e490SVasu Dev /* 2af7f85d9SChris Leech * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved. 3a703e490SVasu Dev * 4a703e490SVasu Dev * This program is free software; you can redistribute it and/or modify it 5a703e490SVasu Dev * under the terms and conditions of the GNU General Public License, 6a703e490SVasu Dev * version 2, as published by the Free Software Foundation. 7a703e490SVasu Dev * 8a703e490SVasu Dev * This program is distributed in the hope it will be useful, but WITHOUT 9a703e490SVasu Dev * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10a703e490SVasu Dev * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11a703e490SVasu Dev * more details. 12a703e490SVasu Dev * 13a703e490SVasu Dev * You should have received a copy of the GNU General Public License along with 14a703e490SVasu Dev * this program; if not, write to the Free Software Foundation, Inc., 15a703e490SVasu Dev * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 16a703e490SVasu Dev * 17a703e490SVasu Dev * Maintained at www.Open-FCoE.org 18a703e490SVasu Dev */ 19a703e490SVasu Dev 20a703e490SVasu Dev #include <linux/module.h> 21a703e490SVasu Dev #include <linux/version.h> 22a703e490SVasu Dev #include <linux/spinlock.h> 23a703e490SVasu Dev #include <linux/netdevice.h> 24a703e490SVasu Dev #include <linux/etherdevice.h> 25a703e490SVasu Dev #include <linux/ethtool.h> 26a703e490SVasu Dev #include <linux/if_ether.h> 27a703e490SVasu Dev #include <linux/if_vlan.h> 28a703e490SVasu Dev #include <linux/crc32.h> 29a703e490SVasu Dev #include <linux/cpu.h> 30a703e490SVasu Dev #include <linux/fs.h> 31a703e490SVasu Dev #include <linux/sysfs.h> 32a703e490SVasu Dev #include <linux/ctype.h> 33a703e490SVasu Dev #include <scsi/scsi_tcq.h> 34a703e490SVasu Dev #include <scsi/scsicam.h> 35a703e490SVasu Dev #include <scsi/scsi_transport.h> 36a703e490SVasu Dev #include <scsi/scsi_transport_fc.h> 37a703e490SVasu Dev #include <net/rtnetlink.h> 38a703e490SVasu Dev 39a703e490SVasu Dev #include <scsi/fc/fc_encaps.h> 4097c8389dSJoe Eykholt #include <scsi/fc/fc_fip.h> 41a703e490SVasu Dev 42a703e490SVasu Dev #include <scsi/libfc.h> 43a703e490SVasu Dev #include <scsi/fc_frame.h> 44a703e490SVasu Dev #include <scsi/libfcoe.h> 45a703e490SVasu Dev 46fdd78027SVasu Dev #include "fcoe.h" 47fdd78027SVasu Dev 48a703e490SVasu Dev MODULE_AUTHOR("Open-FCoE.org"); 49a703e490SVasu Dev MODULE_DESCRIPTION("FCoE"); 509b34ecffSVasu Dev MODULE_LICENSE("GPL v2"); 51a703e490SVasu Dev 5205cc7390SYi Zou /* Performance tuning parameters for fcoe */ 5305cc7390SYi Zou static unsigned int fcoe_ddp_min; 5405cc7390SYi Zou module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); 5505cc7390SYi Zou MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ 5605cc7390SYi Zou "Direct Data Placement (DDP)."); 5705cc7390SYi Zou 58dfc1d0feSChris Leech DEFINE_MUTEX(fcoe_config_mutex); 59dfc1d0feSChris Leech 60e7a51997SJoe Eykholt /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */ 61e7a51997SJoe Eykholt static DECLARE_COMPLETION(fcoe_flush_completion); 62e7a51997SJoe Eykholt 63a703e490SVasu Dev /* fcoe host list */ 64090eb6c4SChris Leech /* must only by accessed under the RTNL mutex */ 65a703e490SVasu Dev LIST_HEAD(fcoe_hostlist); 66a703e490SVasu Dev DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); 67a703e490SVasu Dev 68dd3fd72eSChris Leech /* Function Prototypes */ 691875f27eSRobert Love static int fcoe_reset(struct Scsi_Host *); 70fdd78027SVasu Dev static int fcoe_xmit(struct fc_lport *, struct fc_frame *); 71fdd78027SVasu Dev static int fcoe_rcv(struct sk_buff *, struct net_device *, 72fdd78027SVasu Dev struct packet_type *, struct net_device *); 731875f27eSRobert Love static int fcoe_percpu_receive_thread(void *); 741875f27eSRobert Love static void fcoe_clean_pending_queue(struct fc_lport *); 751875f27eSRobert Love static void fcoe_percpu_clean(struct fc_lport *); 761875f27eSRobert Love static int fcoe_link_ok(struct fc_lport *); 77fdd78027SVasu Dev 78fdd78027SVasu Dev static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); 79fdd78027SVasu Dev static int fcoe_hostlist_add(const struct fc_lport *); 80fdd78027SVasu Dev 814bb6b515SVasu Dev static void fcoe_check_wait_queue(struct fc_lport *, struct sk_buff *); 82a703e490SVasu Dev static int fcoe_device_notification(struct notifier_block *, ulong, void *); 83a703e490SVasu Dev static void fcoe_dev_setup(void); 84a703e490SVasu Dev static void fcoe_dev_cleanup(void); 851875f27eSRobert Love static struct fcoe_interface 861875f27eSRobert Love *fcoe_hostlist_lookup_port(const struct net_device *); 87a703e490SVasu Dev 881875f27eSRobert Love static int fcoe_fip_recv(struct sk_buff *, struct net_device *, 891875f27eSRobert Love struct packet_type *, struct net_device *); 901875f27eSRobert Love 911875f27eSRobert Love static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); 921875f27eSRobert Love static void fcoe_update_src_mac(struct fc_lport *, u8 *); 931875f27eSRobert Love static u8 *fcoe_get_src_mac(struct fc_lport *); 941875f27eSRobert Love static void fcoe_destroy_work(struct work_struct *); 951875f27eSRobert Love 961875f27eSRobert Love static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, 971875f27eSRobert Love unsigned int); 981875f27eSRobert Love static int fcoe_ddp_done(struct fc_lport *, u16); 991875f27eSRobert Love 1001875f27eSRobert Love static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *); 1011875f27eSRobert Love 1021875f27eSRobert Love static int fcoe_create(const char *, struct kernel_param *); 1031875f27eSRobert Love static int fcoe_destroy(const char *, struct kernel_param *); 1041875f27eSRobert Love 1051875f27eSRobert Love static struct fc_seq *fcoe_elsct_send(struct fc_lport *, 1061875f27eSRobert Love u32 did, struct fc_frame *, 1071875f27eSRobert Love unsigned int op, 1081875f27eSRobert Love void (*resp)(struct fc_seq *, 1091875f27eSRobert Love struct fc_frame *, 1101875f27eSRobert Love void *), 1111875f27eSRobert Love void *, u32 timeout); 1121875f27eSRobert Love 1131875f27eSRobert Love module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR); 1141875f27eSRobert Love __MODULE_PARM_TYPE(create, "string"); 1151875f27eSRobert Love MODULE_PARM_DESC(create, "Create fcoe fcoe using net device passed in."); 1161875f27eSRobert Love module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR); 1171875f27eSRobert Love __MODULE_PARM_TYPE(destroy, "string"); 1181875f27eSRobert Love MODULE_PARM_DESC(destroy, "Destroy fcoe fcoe"); 1191875f27eSRobert Love 1201875f27eSRobert Love /* notification function for packets from net device */ 121a703e490SVasu Dev static struct notifier_block fcoe_notifier = { 122a703e490SVasu Dev .notifier_call = fcoe_device_notification, 123a703e490SVasu Dev }; 124a703e490SVasu Dev 1251875f27eSRobert Love /* notification function for CPU hotplug events */ 1261875f27eSRobert Love static struct notifier_block fcoe_cpu_notifier = { 1271875f27eSRobert Love .notifier_call = fcoe_cpu_callback, 1281875f27eSRobert Love }; 1291875f27eSRobert Love 130e9084bb8SChris Leech static struct scsi_transport_template *fcoe_transport_template; 131e9084bb8SChris Leech static struct scsi_transport_template *fcoe_vport_transport_template; 132a703e490SVasu Dev 1331875f27eSRobert Love static int fcoe_vport_destroy(struct fc_vport *); 1341875f27eSRobert Love static int fcoe_vport_create(struct fc_vport *, bool disabled); 1351875f27eSRobert Love static int fcoe_vport_disable(struct fc_vport *, bool disable); 1361875f27eSRobert Love static void fcoe_set_vport_symbolic_name(struct fc_vport *); 1371875f27eSRobert Love 1381875f27eSRobert Love static struct libfc_function_template fcoe_libfc_fcn_templ = { 1391875f27eSRobert Love .frame_send = fcoe_xmit, 1401875f27eSRobert Love .ddp_setup = fcoe_ddp_setup, 1411875f27eSRobert Love .ddp_done = fcoe_ddp_done, 1421875f27eSRobert Love .elsct_send = fcoe_elsct_send, 1431875f27eSRobert Love }; 1449a05753bSChris Leech 145a703e490SVasu Dev struct fc_function_template fcoe_transport_function = { 146a703e490SVasu Dev .show_host_node_name = 1, 147a703e490SVasu Dev .show_host_port_name = 1, 148a703e490SVasu Dev .show_host_supported_classes = 1, 149a703e490SVasu Dev .show_host_supported_fc4s = 1, 150a703e490SVasu Dev .show_host_active_fc4s = 1, 151a703e490SVasu Dev .show_host_maxframe_size = 1, 152a703e490SVasu Dev 153a703e490SVasu Dev .show_host_port_id = 1, 154a703e490SVasu Dev .show_host_supported_speeds = 1, 155a703e490SVasu Dev .get_host_speed = fc_get_host_speed, 156a703e490SVasu Dev .show_host_speed = 1, 157a703e490SVasu Dev .show_host_port_type = 1, 158a703e490SVasu Dev .get_host_port_state = fc_get_host_port_state, 159a703e490SVasu Dev .show_host_port_state = 1, 160a703e490SVasu Dev .show_host_symbolic_name = 1, 161a703e490SVasu Dev 162a703e490SVasu Dev .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 163a703e490SVasu Dev .show_rport_maxframe_size = 1, 164a703e490SVasu Dev .show_rport_supported_classes = 1, 165a703e490SVasu Dev 166a703e490SVasu Dev .show_host_fabric_name = 1, 167a703e490SVasu Dev .show_starget_node_name = 1, 168a703e490SVasu Dev .show_starget_port_name = 1, 169a703e490SVasu Dev .show_starget_port_id = 1, 170a703e490SVasu Dev .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, 171a703e490SVasu Dev .show_rport_dev_loss_tmo = 1, 172a703e490SVasu Dev .get_fc_host_stats = fc_get_host_stats, 173a703e490SVasu Dev .issue_fc_host_lip = fcoe_reset, 174a703e490SVasu Dev 175a703e490SVasu Dev .terminate_rport_io = fc_rport_terminate_io, 1769a05753bSChris Leech 1779a05753bSChris Leech .vport_create = fcoe_vport_create, 1789a05753bSChris Leech .vport_delete = fcoe_vport_destroy, 1799a05753bSChris Leech .vport_disable = fcoe_vport_disable, 180dc8596d3SChris Leech .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, 181a51ab396SSteve Ma 182a51ab396SSteve Ma .bsg_request = fc_lport_bsg_request, 183a703e490SVasu Dev }; 184a703e490SVasu Dev 185e9084bb8SChris Leech struct fc_function_template fcoe_vport_transport_function = { 186e9084bb8SChris Leech .show_host_node_name = 1, 187e9084bb8SChris Leech .show_host_port_name = 1, 188e9084bb8SChris Leech .show_host_supported_classes = 1, 189e9084bb8SChris Leech .show_host_supported_fc4s = 1, 190e9084bb8SChris Leech .show_host_active_fc4s = 1, 191e9084bb8SChris Leech .show_host_maxframe_size = 1, 192e9084bb8SChris Leech 193e9084bb8SChris Leech .show_host_port_id = 1, 194e9084bb8SChris Leech .show_host_supported_speeds = 1, 195e9084bb8SChris Leech .get_host_speed = fc_get_host_speed, 196e9084bb8SChris Leech .show_host_speed = 1, 197e9084bb8SChris Leech .show_host_port_type = 1, 198e9084bb8SChris Leech .get_host_port_state = fc_get_host_port_state, 199e9084bb8SChris Leech .show_host_port_state = 1, 200e9084bb8SChris Leech .show_host_symbolic_name = 1, 201e9084bb8SChris Leech 202e9084bb8SChris Leech .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 203e9084bb8SChris Leech .show_rport_maxframe_size = 1, 204e9084bb8SChris Leech .show_rport_supported_classes = 1, 205e9084bb8SChris Leech 206e9084bb8SChris Leech .show_host_fabric_name = 1, 207e9084bb8SChris Leech .show_starget_node_name = 1, 208e9084bb8SChris Leech .show_starget_port_name = 1, 209e9084bb8SChris Leech .show_starget_port_id = 1, 210e9084bb8SChris Leech .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, 211e9084bb8SChris Leech .show_rport_dev_loss_tmo = 1, 212e9084bb8SChris Leech .get_fc_host_stats = fc_get_host_stats, 213e9084bb8SChris Leech .issue_fc_host_lip = fcoe_reset, 214e9084bb8SChris Leech 215e9084bb8SChris Leech .terminate_rport_io = fc_rport_terminate_io, 216a51ab396SSteve Ma 217a51ab396SSteve Ma .bsg_request = fc_lport_bsg_request, 218e9084bb8SChris Leech }; 219e9084bb8SChris Leech 220a703e490SVasu Dev static struct scsi_host_template fcoe_shost_template = { 221a703e490SVasu Dev .module = THIS_MODULE, 222a703e490SVasu Dev .name = "FCoE Driver", 223a703e490SVasu Dev .proc_name = FCOE_NAME, 224a703e490SVasu Dev .queuecommand = fc_queuecommand, 225a703e490SVasu Dev .eh_abort_handler = fc_eh_abort, 226a703e490SVasu Dev .eh_device_reset_handler = fc_eh_device_reset, 227a703e490SVasu Dev .eh_host_reset_handler = fc_eh_host_reset, 228a703e490SVasu Dev .slave_alloc = fc_slave_alloc, 229a703e490SVasu Dev .change_queue_depth = fc_change_queue_depth, 230a703e490SVasu Dev .change_queue_type = fc_change_queue_type, 231a703e490SVasu Dev .this_id = -1, 23214caf44cSVasu Dev .cmd_per_lun = 3, 233a703e490SVasu Dev .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, 234a703e490SVasu Dev .use_clustering = ENABLE_CLUSTERING, 235a703e490SVasu Dev .sg_tablesize = SG_ALL, 236a703e490SVasu Dev .max_sectors = 0xffff, 237a703e490SVasu Dev }; 238a703e490SVasu Dev 23954b649f8SChris Leech /** 2401875f27eSRobert Love * fcoe_interface_setup() - Setup a FCoE interface 2411875f27eSRobert Love * @fcoe: The new FCoE interface 2421875f27eSRobert Love * @netdev: The net device that the fcoe interface is on 24354b649f8SChris Leech * 24454b649f8SChris Leech * Returns : 0 for success 2452e70e241SChris Leech * Locking: must be called with the RTNL mutex held 24654b649f8SChris Leech */ 24754b649f8SChris Leech static int fcoe_interface_setup(struct fcoe_interface *fcoe, 24854b649f8SChris Leech struct net_device *netdev) 24954b649f8SChris Leech { 25054b649f8SChris Leech struct fcoe_ctlr *fip = &fcoe->ctlr; 25154b649f8SChris Leech struct netdev_hw_addr *ha; 25254b649f8SChris Leech u8 flogi_maddr[ETH_ALEN]; 253b7a727f1SYi Zou const struct net_device_ops *ops; 25454b649f8SChris Leech 25554b649f8SChris Leech fcoe->netdev = netdev; 25654b649f8SChris Leech 257b7a727f1SYi Zou /* Let LLD initialize for FCoE */ 258b7a727f1SYi Zou ops = netdev->netdev_ops; 259b7a727f1SYi Zou if (ops->ndo_fcoe_enable) { 260b7a727f1SYi Zou if (ops->ndo_fcoe_enable(netdev)) 261b7a727f1SYi Zou FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" 262b7a727f1SYi Zou " specific feature for LLD.\n"); 263b7a727f1SYi Zou } 264b7a727f1SYi Zou 26554b649f8SChris Leech /* Do not support for bonding device */ 26654b649f8SChris Leech if ((netdev->priv_flags & IFF_MASTER_ALB) || 26754b649f8SChris Leech (netdev->priv_flags & IFF_SLAVE_INACTIVE) || 26854b649f8SChris Leech (netdev->priv_flags & IFF_MASTER_8023AD)) { 26959d92516Sjohn fastabend FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); 27054b649f8SChris Leech return -EOPNOTSUPP; 27154b649f8SChris Leech } 27254b649f8SChris Leech 27354b649f8SChris Leech /* look for SAN MAC address, if multiple SAN MACs exist, only 27454b649f8SChris Leech * use the first one for SPMA */ 27554b649f8SChris Leech rcu_read_lock(); 27654b649f8SChris Leech for_each_dev_addr(netdev, ha) { 27754b649f8SChris Leech if ((ha->type == NETDEV_HW_ADDR_T_SAN) && 278bf361707SYi Zou (is_valid_ether_addr(ha->addr))) { 27954b649f8SChris Leech memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); 28054b649f8SChris Leech fip->spma = 1; 28154b649f8SChris Leech break; 28254b649f8SChris Leech } 28354b649f8SChris Leech } 28454b649f8SChris Leech rcu_read_unlock(); 28554b649f8SChris Leech 28654b649f8SChris Leech /* setup Source Mac Address */ 28754b649f8SChris Leech if (!fip->spma) 28854b649f8SChris Leech memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); 28954b649f8SChris Leech 29054b649f8SChris Leech /* 29154b649f8SChris Leech * Add FCoE MAC address as second unicast MAC address 29254b649f8SChris Leech * or enter promiscuous mode if not capable of listening 29354b649f8SChris Leech * for multiple unicast MACs. 29454b649f8SChris Leech */ 29554b649f8SChris Leech memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); 29654b649f8SChris Leech dev_unicast_add(netdev, flogi_maddr); 29754b649f8SChris Leech if (fip->spma) 29854b649f8SChris Leech dev_unicast_add(netdev, fip->ctl_src_addr); 29954b649f8SChris Leech dev_mc_add(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); 30054b649f8SChris Leech 30154b649f8SChris Leech /* 30254b649f8SChris Leech * setup the receive function from ethernet driver 30354b649f8SChris Leech * on the ethertype for the given device 30454b649f8SChris Leech */ 30554b649f8SChris Leech fcoe->fcoe_packet_type.func = fcoe_rcv; 30654b649f8SChris Leech fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE); 30754b649f8SChris Leech fcoe->fcoe_packet_type.dev = netdev; 30854b649f8SChris Leech dev_add_pack(&fcoe->fcoe_packet_type); 30954b649f8SChris Leech 31054b649f8SChris Leech fcoe->fip_packet_type.func = fcoe_fip_recv; 31154b649f8SChris Leech fcoe->fip_packet_type.type = htons(ETH_P_FIP); 31254b649f8SChris Leech fcoe->fip_packet_type.dev = netdev; 31354b649f8SChris Leech dev_add_pack(&fcoe->fip_packet_type); 31454b649f8SChris Leech 31554b649f8SChris Leech return 0; 31654b649f8SChris Leech } 31754b649f8SChris Leech 318a703e490SVasu Dev /** 3191875f27eSRobert Love * fcoe_interface_create() - Create a FCoE interface on a net device 3201875f27eSRobert Love * @netdev: The net device to create the FCoE interface on 321030f4e00SChris Leech * 322030f4e00SChris Leech * Returns: pointer to a struct fcoe_interface or NULL on error 323030f4e00SChris Leech */ 324030f4e00SChris Leech static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev) 325030f4e00SChris Leech { 326030f4e00SChris Leech struct fcoe_interface *fcoe; 32759d92516Sjohn fastabend int err; 328030f4e00SChris Leech 329030f4e00SChris Leech fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL); 330030f4e00SChris Leech if (!fcoe) { 331030f4e00SChris Leech FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n"); 332030f4e00SChris Leech return NULL; 333030f4e00SChris Leech } 334030f4e00SChris Leech 3352e70e241SChris Leech dev_hold(netdev); 336030f4e00SChris Leech kref_init(&fcoe->kref); 33754b649f8SChris Leech 33854b649f8SChris Leech /* 33954b649f8SChris Leech * Initialize FIP. 34054b649f8SChris Leech */ 34154b649f8SChris Leech fcoe_ctlr_init(&fcoe->ctlr); 34254b649f8SChris Leech fcoe->ctlr.send = fcoe_fip_send; 34354b649f8SChris Leech fcoe->ctlr.update_mac = fcoe_update_src_mac; 34411b56188SChris Leech fcoe->ctlr.get_src_addr = fcoe_get_src_mac; 34554b649f8SChris Leech 34659d92516Sjohn fastabend err = fcoe_interface_setup(fcoe, netdev); 34759d92516Sjohn fastabend if (err) { 34859d92516Sjohn fastabend fcoe_ctlr_destroy(&fcoe->ctlr); 34959d92516Sjohn fastabend kfree(fcoe); 35059d92516Sjohn fastabend dev_put(netdev); 35159d92516Sjohn fastabend return NULL; 35259d92516Sjohn fastabend } 353030f4e00SChris Leech 354030f4e00SChris Leech return fcoe; 355030f4e00SChris Leech } 356030f4e00SChris Leech 357030f4e00SChris Leech /** 3581875f27eSRobert Love * fcoe_interface_cleanup() - Clean up a FCoE interface 3591875f27eSRobert Love * @fcoe: The FCoE interface to be cleaned up 3602e70e241SChris Leech * 3612e70e241SChris Leech * Caller must be holding the RTNL mutex 36254b649f8SChris Leech */ 36354b649f8SChris Leech void fcoe_interface_cleanup(struct fcoe_interface *fcoe) 36454b649f8SChris Leech { 36554b649f8SChris Leech struct net_device *netdev = fcoe->netdev; 36654b649f8SChris Leech struct fcoe_ctlr *fip = &fcoe->ctlr; 36754b649f8SChris Leech u8 flogi_maddr[ETH_ALEN]; 368b7a727f1SYi Zou const struct net_device_ops *ops; 36954b649f8SChris Leech 37054b649f8SChris Leech /* 37154b649f8SChris Leech * Don't listen for Ethernet packets anymore. 37254b649f8SChris Leech * synchronize_net() ensures that the packet handlers are not running 37354b649f8SChris Leech * on another CPU. dev_remove_pack() would do that, this calls the 37454b649f8SChris Leech * unsyncronized version __dev_remove_pack() to avoid multiple delays. 37554b649f8SChris Leech */ 37654b649f8SChris Leech __dev_remove_pack(&fcoe->fcoe_packet_type); 37754b649f8SChris Leech __dev_remove_pack(&fcoe->fip_packet_type); 37854b649f8SChris Leech synchronize_net(); 37954b649f8SChris Leech 38054b649f8SChris Leech /* Delete secondary MAC addresses */ 38154b649f8SChris Leech memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); 38254b649f8SChris Leech dev_unicast_delete(netdev, flogi_maddr); 38354b649f8SChris Leech if (fip->spma) 38454b649f8SChris Leech dev_unicast_delete(netdev, fip->ctl_src_addr); 38554b649f8SChris Leech dev_mc_delete(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); 386b7a727f1SYi Zou 387b7a727f1SYi Zou /* Tell the LLD we are done w/ FCoE */ 388b7a727f1SYi Zou ops = netdev->netdev_ops; 389b7a727f1SYi Zou if (ops->ndo_fcoe_disable) { 390b7a727f1SYi Zou if (ops->ndo_fcoe_disable(netdev)) 391b7a727f1SYi Zou FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" 392b7a727f1SYi Zou " specific feature for LLD.\n"); 393b7a727f1SYi Zou } 39454b649f8SChris Leech } 39554b649f8SChris Leech 39654b649f8SChris Leech /** 397030f4e00SChris Leech * fcoe_interface_release() - fcoe_port kref release function 3981875f27eSRobert Love * @kref: Embedded reference count in an fcoe_interface struct 399030f4e00SChris Leech */ 400030f4e00SChris Leech static void fcoe_interface_release(struct kref *kref) 401030f4e00SChris Leech { 402030f4e00SChris Leech struct fcoe_interface *fcoe; 4032e70e241SChris Leech struct net_device *netdev; 404030f4e00SChris Leech 405030f4e00SChris Leech fcoe = container_of(kref, struct fcoe_interface, kref); 4062e70e241SChris Leech netdev = fcoe->netdev; 4072e70e241SChris Leech /* tear-down the FCoE controller */ 4082e70e241SChris Leech fcoe_ctlr_destroy(&fcoe->ctlr); 409030f4e00SChris Leech kfree(fcoe); 4102e70e241SChris Leech dev_put(netdev); 411030f4e00SChris Leech } 412030f4e00SChris Leech 413030f4e00SChris Leech /** 4141875f27eSRobert Love * fcoe_interface_get() - Get a reference to a FCoE interface 4151875f27eSRobert Love * @fcoe: The FCoE interface to be held 416030f4e00SChris Leech */ 417030f4e00SChris Leech static inline void fcoe_interface_get(struct fcoe_interface *fcoe) 418030f4e00SChris Leech { 419030f4e00SChris Leech kref_get(&fcoe->kref); 420030f4e00SChris Leech } 421030f4e00SChris Leech 422030f4e00SChris Leech /** 4231875f27eSRobert Love * fcoe_interface_put() - Put a reference to a FCoE interface 4241875f27eSRobert Love * @fcoe: The FCoE interface to be released 425030f4e00SChris Leech */ 426030f4e00SChris Leech static inline void fcoe_interface_put(struct fcoe_interface *fcoe) 427030f4e00SChris Leech { 428030f4e00SChris Leech kref_put(&fcoe->kref, fcoe_interface_release); 429030f4e00SChris Leech } 430030f4e00SChris Leech 431030f4e00SChris Leech /** 4321875f27eSRobert Love * fcoe_fip_recv() - Handler for received FIP frames 4331875f27eSRobert Love * @skb: The receive skb 4341875f27eSRobert Love * @netdev: The associated net device 4351875f27eSRobert Love * @ptype: The packet_type structure which was used to register this handler 4361875f27eSRobert Love * @orig_dev: The original net_device the the skb was received on. 4371875f27eSRobert Love * (in case dev is a bond) 438ab6b85c1SVasu Dev * 439ab6b85c1SVasu Dev * Returns: 0 for success 440ab6b85c1SVasu Dev */ 4411875f27eSRobert Love static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, 442ab6b85c1SVasu Dev struct packet_type *ptype, 443ab6b85c1SVasu Dev struct net_device *orig_dev) 444ab6b85c1SVasu Dev { 445259ad85dSChris Leech struct fcoe_interface *fcoe; 446ab6b85c1SVasu Dev 447259ad85dSChris Leech fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); 4483fe9a0baSChris Leech fcoe_ctlr_recv(&fcoe->ctlr, skb); 449ab6b85c1SVasu Dev return 0; 450ab6b85c1SVasu Dev } 451ab6b85c1SVasu Dev 452ab6b85c1SVasu Dev /** 4531875f27eSRobert Love * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame 4541875f27eSRobert Love * @fip: The FCoE controller 4551875f27eSRobert Love * @skb: The FIP packet to be sent 456ab6b85c1SVasu Dev */ 457ab6b85c1SVasu Dev static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) 458ab6b85c1SVasu Dev { 4593fe9a0baSChris Leech skb->dev = fcoe_from_ctlr(fip)->netdev; 460ab6b85c1SVasu Dev dev_queue_xmit(skb); 461ab6b85c1SVasu Dev } 462ab6b85c1SVasu Dev 463ab6b85c1SVasu Dev /** 4641875f27eSRobert Love * fcoe_update_src_mac() - Update the Ethernet MAC filters 4651875f27eSRobert Love * @lport: The local port to update the source MAC on 4661875f27eSRobert Love * @addr: Unicast MAC address to add 467ab6b85c1SVasu Dev * 468ab6b85c1SVasu Dev * Remove any previously-set unicast MAC filter. 469ab6b85c1SVasu Dev * Add secondary FCoE MAC address filter for our OUI. 470ab6b85c1SVasu Dev */ 47111b56188SChris Leech static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) 472ab6b85c1SVasu Dev { 47311b56188SChris Leech struct fcoe_port *port = lport_priv(lport); 47411b56188SChris Leech struct fcoe_interface *fcoe = port->fcoe; 475ab6b85c1SVasu Dev 476ab6b85c1SVasu Dev rtnl_lock(); 47711b56188SChris Leech if (!is_zero_ether_addr(port->data_src_addr)) 47811b56188SChris Leech dev_unicast_delete(fcoe->netdev, port->data_src_addr); 47911b56188SChris Leech if (!is_zero_ether_addr(addr)) 48011b56188SChris Leech dev_unicast_add(fcoe->netdev, addr); 48111b56188SChris Leech memcpy(port->data_src_addr, addr, ETH_ALEN); 482ab6b85c1SVasu Dev rtnl_unlock(); 483ab6b85c1SVasu Dev } 484ab6b85c1SVasu Dev 485ab6b85c1SVasu Dev /** 48611b56188SChris Leech * fcoe_get_src_mac() - return the Ethernet source address for an lport 48711b56188SChris Leech * @lport: libfc lport 48811b56188SChris Leech */ 48911b56188SChris Leech static u8 *fcoe_get_src_mac(struct fc_lport *lport) 49011b56188SChris Leech { 49111b56188SChris Leech struct fcoe_port *port = lport_priv(lport); 49211b56188SChris Leech 49311b56188SChris Leech return port->data_src_addr; 49411b56188SChris Leech } 49511b56188SChris Leech 49611b56188SChris Leech /** 4971875f27eSRobert Love * fcoe_lport_config() - Set up a local port 4981875f27eSRobert Love * @lport: The local port to be setup 499a703e490SVasu Dev * 500a703e490SVasu Dev * Returns: 0 for success 501a703e490SVasu Dev */ 5021875f27eSRobert Love static int fcoe_lport_config(struct fc_lport *lport) 503a703e490SVasu Dev { 5041875f27eSRobert Love lport->link_up = 0; 5051875f27eSRobert Love lport->qfull = 0; 5061875f27eSRobert Love lport->max_retry_count = 3; 5071875f27eSRobert Love lport->max_rport_retry_count = 3; 5081875f27eSRobert Love lport->e_d_tov = 2 * 1000; /* FC-FS default */ 5091875f27eSRobert Love lport->r_a_tov = 2 * 2 * 1000; 5101875f27eSRobert Love lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | 511a703e490SVasu Dev FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); 5121875f27eSRobert Love lport->does_npiv = 1; 513a703e490SVasu Dev 5141875f27eSRobert Love fc_lport_init_stats(lport); 515a703e490SVasu Dev 516a703e490SVasu Dev /* lport fc_lport related configuration */ 5171875f27eSRobert Love fc_lport_config(lport); 518a703e490SVasu Dev 519a703e490SVasu Dev /* offload related configuration */ 5201875f27eSRobert Love lport->crc_offload = 0; 5211875f27eSRobert Love lport->seq_offload = 0; 5221875f27eSRobert Love lport->lro_enabled = 0; 5231875f27eSRobert Love lport->lro_xid = 0; 5241875f27eSRobert Love lport->lso_max = 0; 525a703e490SVasu Dev 526a703e490SVasu Dev return 0; 527a703e490SVasu Dev } 528a703e490SVasu Dev 529a703e490SVasu Dev /** 5301875f27eSRobert Love * fcoe_queue_timer() - The fcoe queue timer 5311875f27eSRobert Love * @lport: The local port 5321047f221SVasu Dev * 5331047f221SVasu Dev * Calls fcoe_check_wait_queue on timeout 5341047f221SVasu Dev */ 5351875f27eSRobert Love static void fcoe_queue_timer(ulong lport) 5361047f221SVasu Dev { 5371875f27eSRobert Love fcoe_check_wait_queue((struct fc_lport *)lport, NULL); 5381047f221SVasu Dev } 5391047f221SVasu Dev 5401047f221SVasu Dev /** 5411875f27eSRobert Love * fcoe_netdev_config() - Set up net devive for SW FCoE 5421875f27eSRobert Love * @lport: The local port that is associated with the net device 5431875f27eSRobert Love * @netdev: The associated net device 544a703e490SVasu Dev * 5451875f27eSRobert Love * Must be called after fcoe_lport_config() as it will use local port mutex 546a703e490SVasu Dev * 547a703e490SVasu Dev * Returns: 0 for success 548a703e490SVasu Dev */ 5491875f27eSRobert Love static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) 550a703e490SVasu Dev { 551a703e490SVasu Dev u32 mfs; 552a703e490SVasu Dev u64 wwnn, wwpn; 55325024989SChris Leech struct fcoe_interface *fcoe; 554014f5c3fSChris Leech struct fcoe_port *port; 555a703e490SVasu Dev 556a703e490SVasu Dev /* Setup lport private data to point to fcoe softc */ 5571875f27eSRobert Love port = lport_priv(lport); 55825024989SChris Leech fcoe = port->fcoe; 559a703e490SVasu Dev 560a703e490SVasu Dev /* 561a703e490SVasu Dev * Determine max frame size based on underlying device and optional 562a703e490SVasu Dev * user-configured limit. If the MFS is too low, fcoe_link_ok() 563a703e490SVasu Dev * will return 0, so do this first. 564a703e490SVasu Dev */ 5657221d7e5SYi Zou mfs = netdev->mtu; 5667221d7e5SYi Zou if (netdev->features & NETIF_F_FCOE_MTU) { 5677221d7e5SYi Zou mfs = FCOE_MTU; 5687221d7e5SYi Zou FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); 5697221d7e5SYi Zou } 5707221d7e5SYi Zou mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); 5711875f27eSRobert Love if (fc_set_mfs(lport, mfs)) 572a703e490SVasu Dev return -EINVAL; 573a703e490SVasu Dev 574a703e490SVasu Dev /* offload features support */ 5751d1b88dcSVasu Dev if (netdev->features & NETIF_F_SG) 5761875f27eSRobert Love lport->sg_supp = 1; 577a703e490SVasu Dev 578a703e490SVasu Dev if (netdev->features & NETIF_F_FCOE_CRC) { 5791875f27eSRobert Love lport->crc_offload = 1; 580d5488eb9SRobert Love FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); 581a703e490SVasu Dev } 582a703e490SVasu Dev if (netdev->features & NETIF_F_FSO) { 5831875f27eSRobert Love lport->seq_offload = 1; 5841875f27eSRobert Love lport->lso_max = netdev->gso_max_size; 585d5488eb9SRobert Love FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", 5861875f27eSRobert Love lport->lso_max); 587a703e490SVasu Dev } 588a703e490SVasu Dev if (netdev->fcoe_ddp_xid) { 5891875f27eSRobert Love lport->lro_enabled = 1; 5901875f27eSRobert Love lport->lro_xid = netdev->fcoe_ddp_xid; 591d5488eb9SRobert Love FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", 5921875f27eSRobert Love lport->lro_xid); 593a703e490SVasu Dev } 594014f5c3fSChris Leech skb_queue_head_init(&port->fcoe_pending_queue); 595014f5c3fSChris Leech port->fcoe_pending_queue_active = 0; 5961875f27eSRobert Love setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport); 597a703e490SVasu Dev 5981875f27eSRobert Love if (!lport->vport) { 5991d1b88dcSVasu Dev wwnn = fcoe_wwn_from_mac(netdev->dev_addr, 1, 0); 6001875f27eSRobert Love fc_set_wwnn(lport, wwnn); 601a703e490SVasu Dev /* XXX - 3rd arg needs to be vlan id */ 6021d1b88dcSVasu Dev wwpn = fcoe_wwn_from_mac(netdev->dev_addr, 2, 0); 6031875f27eSRobert Love fc_set_wwpn(lport, wwpn); 6049a05753bSChris Leech } 605a703e490SVasu Dev 606a703e490SVasu Dev return 0; 607a703e490SVasu Dev } 608a703e490SVasu Dev 609a703e490SVasu Dev /** 6101875f27eSRobert Love * fcoe_shost_config() - Set up the SCSI host associated with a local port 6111875f27eSRobert Love * @lport: The local port 6121875f27eSRobert Love * @shost: The SCSI host to associate with the local port 6131875f27eSRobert Love * @dev: The device associated with the SCSI host 614a703e490SVasu Dev * 615a703e490SVasu Dev * Must be called after fcoe_lport_config() and fcoe_netdev_config() 616a703e490SVasu Dev * 617a703e490SVasu Dev * Returns: 0 for success 618a703e490SVasu Dev */ 6191875f27eSRobert Love static int fcoe_shost_config(struct fc_lport *lport, struct Scsi_Host *shost, 620a703e490SVasu Dev struct device *dev) 621a703e490SVasu Dev { 622a703e490SVasu Dev int rc = 0; 623a703e490SVasu Dev 624a703e490SVasu Dev /* lport scsi host config */ 6251875f27eSRobert Love lport->host->max_lun = FCOE_MAX_LUN; 6261875f27eSRobert Love lport->host->max_id = FCOE_MAX_FCP_TARGET; 6271875f27eSRobert Love lport->host->max_channel = 0; 6281875f27eSRobert Love if (lport->vport) 6291875f27eSRobert Love lport->host->transportt = fcoe_vport_transport_template; 630e9084bb8SChris Leech else 6311875f27eSRobert Love lport->host->transportt = fcoe_transport_template; 632a703e490SVasu Dev 633a703e490SVasu Dev /* add the new host to the SCSI-ml */ 6341875f27eSRobert Love rc = scsi_add_host(lport->host, dev); 635a703e490SVasu Dev if (rc) { 6361875f27eSRobert Love FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " 637d5488eb9SRobert Love "error on scsi_add_host\n"); 638a703e490SVasu Dev return rc; 639a703e490SVasu Dev } 6409a05753bSChris Leech 6411875f27eSRobert Love if (!lport->vport) 6421875f27eSRobert Love fc_host_max_npiv_vports(lport->host) = USHORT_MAX; 6439a05753bSChris Leech 6441875f27eSRobert Love snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, 6455baa17c3SChris Leech "%s v%s over %s", FCOE_NAME, FCOE_VERSION, 6461875f27eSRobert Love fcoe_netdev(lport)->name); 647a703e490SVasu Dev 648a703e490SVasu Dev return 0; 649a703e490SVasu Dev } 650a703e490SVasu Dev 6511875f27eSRobert Love /** 6521875f27eSRobert Love * fcoe_oem_match() - The match routine for the offloaded exchange manager 6531875f27eSRobert Love * @fp: The I/O frame 654d7179680SVasu Dev * 6551875f27eSRobert Love * This routine will be associated with an exchange manager (EM). When 6561875f27eSRobert Love * the libfc exchange handling code is looking for an EM to use it will 6571875f27eSRobert Love * call this routine and pass it the frame that it wishes to send. This 6581875f27eSRobert Love * routine will return True if the associated EM is to be used and False 6591875f27eSRobert Love * if the echange code should continue looking for an EM. 6601875f27eSRobert Love * 6611875f27eSRobert Love * The offload EM that this routine is associated with will handle any 6621875f27eSRobert Love * packets that are for SCSI read requests. 6631875f27eSRobert Love * 6641875f27eSRobert Love * Returns: True for read types I/O, otherwise returns false. 665d7179680SVasu Dev */ 666d7179680SVasu Dev bool fcoe_oem_match(struct fc_frame *fp) 667d7179680SVasu Dev { 66805cc7390SYi Zou return fc_fcp_is_read(fr_fsp(fp)) && 66905cc7390SYi Zou (fr_fsp(fp)->data_len > fcoe_ddp_min); 670d7179680SVasu Dev } 671d7179680SVasu Dev 672a703e490SVasu Dev /** 6731875f27eSRobert Love * fcoe_em_config() - Allocate and configure an exchange manager 6741875f27eSRobert Love * @lport: The local port that the new EM will be associated with 675a703e490SVasu Dev * 676a703e490SVasu Dev * Returns: 0 on success 677a703e490SVasu Dev */ 6781875f27eSRobert Love static inline int fcoe_em_config(struct fc_lport *lport) 679a703e490SVasu Dev { 6801875f27eSRobert Love struct fcoe_port *port = lport_priv(lport); 68125024989SChris Leech struct fcoe_interface *fcoe = port->fcoe; 68225024989SChris Leech struct fcoe_interface *oldfcoe = NULL; 6831d1b88dcSVasu Dev struct net_device *old_real_dev, *cur_real_dev; 684d7179680SVasu Dev u16 min_xid = FCOE_MIN_XID; 685d7179680SVasu Dev u16 max_xid = FCOE_MAX_XID; 686d7179680SVasu Dev 687d7179680SVasu Dev /* 688d7179680SVasu Dev * Check if need to allocate an em instance for 689d7179680SVasu Dev * offload exchange ids to be shared across all VN_PORTs/lport. 690d7179680SVasu Dev */ 6911875f27eSRobert Love if (!lport->lro_enabled || !lport->lro_xid || 6921875f27eSRobert Love (lport->lro_xid >= max_xid)) { 6931875f27eSRobert Love lport->lro_xid = 0; 694d7179680SVasu Dev goto skip_oem; 695d7179680SVasu Dev } 696d7179680SVasu Dev 697d7179680SVasu Dev /* 698d7179680SVasu Dev * Reuse existing offload em instance in case 6991d1b88dcSVasu Dev * it is already allocated on real eth device 700d7179680SVasu Dev */ 70125024989SChris Leech if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) 70225024989SChris Leech cur_real_dev = vlan_dev_real_dev(fcoe->netdev); 7031d1b88dcSVasu Dev else 70425024989SChris Leech cur_real_dev = fcoe->netdev; 7051d1b88dcSVasu Dev 70625024989SChris Leech list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { 70725024989SChris Leech if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) 70825024989SChris Leech old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); 7091d1b88dcSVasu Dev else 71025024989SChris Leech old_real_dev = oldfcoe->netdev; 7111d1b88dcSVasu Dev 7121d1b88dcSVasu Dev if (cur_real_dev == old_real_dev) { 713991cbb60SChris Leech fcoe->oem = oldfcoe->oem; 714d7179680SVasu Dev break; 715d7179680SVasu Dev } 716d7179680SVasu Dev } 717d7179680SVasu Dev 718991cbb60SChris Leech if (fcoe->oem) { 7191875f27eSRobert Love if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { 720d7179680SVasu Dev printk(KERN_ERR "fcoe_em_config: failed to add " 721d7179680SVasu Dev "offload em:%p on interface:%s\n", 722991cbb60SChris Leech fcoe->oem, fcoe->netdev->name); 723a703e490SVasu Dev return -ENOMEM; 724d7179680SVasu Dev } 725d7179680SVasu Dev } else { 7261875f27eSRobert Love fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, 7271875f27eSRobert Love FCOE_MIN_XID, lport->lro_xid, 728d7179680SVasu Dev fcoe_oem_match); 729991cbb60SChris Leech if (!fcoe->oem) { 730d7179680SVasu Dev printk(KERN_ERR "fcoe_em_config: failed to allocate " 731d7179680SVasu Dev "em for offload exches on interface:%s\n", 73225024989SChris Leech fcoe->netdev->name); 733d7179680SVasu Dev return -ENOMEM; 734d7179680SVasu Dev } 735d7179680SVasu Dev } 736d7179680SVasu Dev 737d7179680SVasu Dev /* 738d7179680SVasu Dev * Exclude offload EM xid range from next EM xid range. 739d7179680SVasu Dev */ 7401875f27eSRobert Love min_xid += lport->lro_xid + 1; 741d7179680SVasu Dev 742d7179680SVasu Dev skip_oem: 7431875f27eSRobert Love if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { 744d7179680SVasu Dev printk(KERN_ERR "fcoe_em_config: failed to " 74525024989SChris Leech "allocate em on interface %s\n", fcoe->netdev->name); 746d7179680SVasu Dev return -ENOMEM; 747d7179680SVasu Dev } 748a703e490SVasu Dev 749a703e490SVasu Dev return 0; 750a703e490SVasu Dev } 751a703e490SVasu Dev 752a703e490SVasu Dev /** 7531875f27eSRobert Love * fcoe_if_destroy() - Tear down a SW FCoE instance 7541875f27eSRobert Love * @lport: The local port to be destroyed 755a703e490SVasu Dev */ 756af7f85d9SChris Leech static void fcoe_if_destroy(struct fc_lport *lport) 757a703e490SVasu Dev { 758014f5c3fSChris Leech struct fcoe_port *port = lport_priv(lport); 759014f5c3fSChris Leech struct fcoe_interface *fcoe = port->fcoe; 76025024989SChris Leech struct net_device *netdev = fcoe->netdev; 761a703e490SVasu Dev 762d5488eb9SRobert Love FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); 763a703e490SVasu Dev 764a703e490SVasu Dev /* Logout of the fabric */ 765af7f85d9SChris Leech fc_fabric_logoff(lport); 766a703e490SVasu Dev 767a703e490SVasu Dev /* Cleanup the fc_lport */ 768af7f85d9SChris Leech fc_lport_destroy(lport); 769af7f85d9SChris Leech fc_fcp_destroy(lport); 770a703e490SVasu Dev 77154b649f8SChris Leech /* Stop the transmit retry timer */ 77254b649f8SChris Leech del_timer_sync(&port->timer); 77354b649f8SChris Leech 77454b649f8SChris Leech /* Free existing transmit skbs */ 77554b649f8SChris Leech fcoe_clean_pending_queue(lport); 77654b649f8SChris Leech 77711b56188SChris Leech rtnl_lock(); 77811b56188SChris Leech if (!is_zero_ether_addr(port->data_src_addr)) 77911b56188SChris Leech dev_unicast_delete(netdev, port->data_src_addr); 78011b56188SChris Leech rtnl_unlock(); 78111b56188SChris Leech 78254b649f8SChris Leech /* receives may not be stopped until after this */ 78354b649f8SChris Leech fcoe_interface_put(fcoe); 78454b649f8SChris Leech 78554b649f8SChris Leech /* Free queued packets for the per-CPU receive threads */ 78654b649f8SChris Leech fcoe_percpu_clean(lport); 78754b649f8SChris Leech 788a703e490SVasu Dev /* Detach from the scsi-ml */ 789af7f85d9SChris Leech fc_remove_host(lport->host); 790af7f85d9SChris Leech scsi_remove_host(lport->host); 791a703e490SVasu Dev 792a703e490SVasu Dev /* There are no more rports or I/O, free the EM */ 793af7f85d9SChris Leech fc_exch_mgr_free(lport); 794a703e490SVasu Dev 795a703e490SVasu Dev /* Free memory used by statistical counters */ 796af7f85d9SChris Leech fc_lport_free_stats(lport); 797a703e490SVasu Dev 7982e70e241SChris Leech /* Release the Scsi_Host */ 799af7f85d9SChris Leech scsi_host_put(lport->host); 800a703e490SVasu Dev } 801a703e490SVasu Dev 8021875f27eSRobert Love /** 8031875f27eSRobert Love * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device 8041875f27eSRobert Love * @lport: The local port to setup DDP for 8051875f27eSRobert Love * @xid: The exchange ID for this DDP transfer 8061875f27eSRobert Love * @sgl: The scatterlist describing this transfer 8071875f27eSRobert Love * @sgc: The number of sg items 808a703e490SVasu Dev * 8091875f27eSRobert Love * Returns: 0 if the DDP context was not configured 810a703e490SVasu Dev */ 8111875f27eSRobert Love static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, 812a703e490SVasu Dev struct scatterlist *sgl, unsigned int sgc) 813a703e490SVasu Dev { 8141875f27eSRobert Love struct net_device *netdev = fcoe_netdev(lport); 815a703e490SVasu Dev 8161875f27eSRobert Love if (netdev->netdev_ops->ndo_fcoe_ddp_setup) 8171875f27eSRobert Love return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, 8181875f27eSRobert Love xid, sgl, 8191875f27eSRobert Love sgc); 820a703e490SVasu Dev 821a703e490SVasu Dev return 0; 822a703e490SVasu Dev } 823a703e490SVasu Dev 824a703e490SVasu Dev /** 8251875f27eSRobert Love * fcoe_ddp_done() - Call a LLD's ddp_done through the net device 8261875f27eSRobert Love * @lport: The local port to complete DDP on 8271875f27eSRobert Love * @xid: The exchange ID for this DDP transfer 828a703e490SVasu Dev * 8291875f27eSRobert Love * Returns: the length of data that have been completed by DDP 8301875f27eSRobert Love */ 8311875f27eSRobert Love static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) 8321875f27eSRobert Love { 8331875f27eSRobert Love struct net_device *netdev = fcoe_netdev(lport); 8341875f27eSRobert Love 8351875f27eSRobert Love if (netdev->netdev_ops->ndo_fcoe_ddp_done) 8361875f27eSRobert Love return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); 8371875f27eSRobert Love return 0; 8381875f27eSRobert Love } 8391875f27eSRobert Love 8401875f27eSRobert Love /** 8411875f27eSRobert Love * fcoe_if_create() - Create a FCoE instance on an interface 8421875f27eSRobert Love * @fcoe: The FCoE interface to create a local port on 8431875f27eSRobert Love * @parent: The device pointer to be the parent in sysfs for the SCSI host 8441875f27eSRobert Love * @npiv: Indicates if the port is a vport or not 8451875f27eSRobert Love * 8461875f27eSRobert Love * Creates a fc_lport instance and a Scsi_Host instance and configure them. 847a703e490SVasu Dev * 848af7f85d9SChris Leech * Returns: The allocated fc_lport or an error pointer 849a703e490SVasu Dev */ 850030f4e00SChris Leech static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, 8519a05753bSChris Leech struct device *parent, int npiv) 852a703e490SVasu Dev { 8531875f27eSRobert Love struct net_device *netdev = fcoe->netdev; 854af7f85d9SChris Leech struct fc_lport *lport = NULL; 855014f5c3fSChris Leech struct fcoe_port *port; 856a703e490SVasu Dev struct Scsi_Host *shost; 8571875f27eSRobert Love int rc; 8589a05753bSChris Leech /* 8599a05753bSChris Leech * parent is only a vport if npiv is 1, 8609a05753bSChris Leech * but we'll only use vport in that case so go ahead and set it 8619a05753bSChris Leech */ 8629a05753bSChris Leech struct fc_vport *vport = dev_to_vport(parent); 863a703e490SVasu Dev 864d5488eb9SRobert Love FCOE_NETDEV_DBG(netdev, "Create Interface\n"); 865a703e490SVasu Dev 8669a05753bSChris Leech if (!npiv) { 86786221969SChris Leech lport = libfc_host_alloc(&fcoe_shost_template, 868014f5c3fSChris Leech sizeof(struct fcoe_port)); 8699a05753bSChris Leech } else { 8709a05753bSChris Leech lport = libfc_vport_create(vport, 8719a05753bSChris Leech sizeof(struct fcoe_port)); 8729a05753bSChris Leech } 87386221969SChris Leech if (!lport) { 874014f5c3fSChris Leech FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); 875014f5c3fSChris Leech rc = -ENOMEM; 876030f4e00SChris Leech goto out; 877014f5c3fSChris Leech } 87886221969SChris Leech shost = lport->host; 879014f5c3fSChris Leech port = lport_priv(lport); 8802e70e241SChris Leech port->lport = lport; 881014f5c3fSChris Leech port->fcoe = fcoe; 8822e70e241SChris Leech INIT_WORK(&port->destroy_work, fcoe_destroy_work); 883a703e490SVasu Dev 8841875f27eSRobert Love /* configure a fc_lport including the exchange manager */ 885af7f85d9SChris Leech rc = fcoe_lport_config(lport); 886a703e490SVasu Dev if (rc) { 887d5488eb9SRobert Love FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " 888d5488eb9SRobert Love "interface\n"); 889a703e490SVasu Dev goto out_host_put; 890a703e490SVasu Dev } 891a703e490SVasu Dev 8929a05753bSChris Leech if (npiv) { 8939a05753bSChris Leech FCOE_NETDEV_DBG(netdev, "Setting vport names, 0x%llX 0x%llX\n", 8949a05753bSChris Leech vport->node_name, vport->port_name); 8959a05753bSChris Leech fc_set_wwnn(lport, vport->node_name); 8969a05753bSChris Leech fc_set_wwpn(lport, vport->port_name); 8979a05753bSChris Leech } 8989a05753bSChris Leech 899ab6b85c1SVasu Dev /* configure lport network properties */ 900af7f85d9SChris Leech rc = fcoe_netdev_config(lport, netdev); 901ab6b85c1SVasu Dev if (rc) { 902d5488eb9SRobert Love FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " 903d5488eb9SRobert Love "interface\n"); 90454b649f8SChris Leech goto out_lp_destroy; 905ab6b85c1SVasu Dev } 90697c8389dSJoe Eykholt 907a703e490SVasu Dev /* configure lport scsi host properties */ 908af7f85d9SChris Leech rc = fcoe_shost_config(lport, shost, parent); 909a703e490SVasu Dev if (rc) { 910d5488eb9SRobert Love FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " 911d5488eb9SRobert Love "interface\n"); 91254b649f8SChris Leech goto out_lp_destroy; 913a703e490SVasu Dev } 914a703e490SVasu Dev 915a703e490SVasu Dev /* Initialize the library */ 916af7f85d9SChris Leech rc = fcoe_libfc_config(lport, &fcoe_libfc_fcn_templ); 917a703e490SVasu Dev if (rc) { 918d5488eb9SRobert Love FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " 919d5488eb9SRobert Love "interface\n"); 920a703e490SVasu Dev goto out_lp_destroy; 921a703e490SVasu Dev } 922a703e490SVasu Dev 9239a05753bSChris Leech if (!npiv) { 924e8af4d43SVasu Dev /* 925e8af4d43SVasu Dev * fcoe_em_alloc() and fcoe_hostlist_add() both 9269a05753bSChris Leech * need to be atomic with respect to other changes to the 9279a05753bSChris Leech * hostlist since fcoe_em_alloc() looks for an existing EM 928e8af4d43SVasu Dev * instance on host list updated by fcoe_hostlist_add(). 929c863df33SChris Leech * 9309a05753bSChris Leech * This is currently handled through the fcoe_config_mutex 9319a05753bSChris Leech * begin held. 932e8af4d43SVasu Dev */ 933c863df33SChris Leech 93496316099SVasu Dev /* lport exch manager allocation */ 935af7f85d9SChris Leech rc = fcoe_em_config(lport); 93696316099SVasu Dev if (rc) { 9379a05753bSChris Leech FCOE_NETDEV_DBG(netdev, "Could not configure the EM " 9389a05753bSChris Leech "for the interface\n"); 93996316099SVasu Dev goto out_lp_destroy; 94096316099SVasu Dev } 9419a05753bSChris Leech } 94296316099SVasu Dev 943030f4e00SChris Leech fcoe_interface_get(fcoe); 944af7f85d9SChris Leech return lport; 945a703e490SVasu Dev 946a703e490SVasu Dev out_lp_destroy: 947af7f85d9SChris Leech fc_exch_mgr_free(lport); 948a703e490SVasu Dev out_host_put: 949af7f85d9SChris Leech scsi_host_put(lport->host); 950af7f85d9SChris Leech out: 951af7f85d9SChris Leech return ERR_PTR(rc); 952a703e490SVasu Dev } 953a703e490SVasu Dev 954a703e490SVasu Dev /** 9551875f27eSRobert Love * fcoe_if_init() - Initialization routine for fcoe.ko 9561875f27eSRobert Love * 9571875f27eSRobert Love * Attaches the SW FCoE transport to the FC transport 958a703e490SVasu Dev * 959a703e490SVasu Dev * Returns: 0 on success 960a703e490SVasu Dev */ 961a703e490SVasu Dev static int __init fcoe_if_init(void) 962a703e490SVasu Dev { 963a703e490SVasu Dev /* attach to scsi transport */ 964e9084bb8SChris Leech fcoe_transport_template = fc_attach_transport(&fcoe_transport_function); 965e9084bb8SChris Leech fcoe_vport_transport_template = 966e9084bb8SChris Leech fc_attach_transport(&fcoe_vport_transport_function); 967a703e490SVasu Dev 968e9084bb8SChris Leech if (!fcoe_transport_template) { 969d5488eb9SRobert Love printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); 970a703e490SVasu Dev return -ENODEV; 971a703e490SVasu Dev } 972a703e490SVasu Dev 973a703e490SVasu Dev return 0; 974a703e490SVasu Dev } 975a703e490SVasu Dev 976a703e490SVasu Dev /** 9771875f27eSRobert Love * fcoe_if_exit() - Tear down fcoe.ko 9781875f27eSRobert Love * 9791875f27eSRobert Love * Detaches the SW FCoE transport from the FC transport 980a703e490SVasu Dev * 981a703e490SVasu Dev * Returns: 0 on success 982a703e490SVasu Dev */ 983a703e490SVasu Dev int __exit fcoe_if_exit(void) 984a703e490SVasu Dev { 985e9084bb8SChris Leech fc_release_transport(fcoe_transport_template); 986e9084bb8SChris Leech fc_release_transport(fcoe_vport_transport_template); 987e9084bb8SChris Leech fcoe_transport_template = NULL; 988e9084bb8SChris Leech fcoe_vport_transport_template = NULL; 989a703e490SVasu Dev return 0; 990a703e490SVasu Dev } 991a703e490SVasu Dev 992a703e490SVasu Dev /** 9931875f27eSRobert Love * fcoe_percpu_thread_create() - Create a receive thread for an online CPU 9941875f27eSRobert Love * @cpu: The CPU index of the CPU to create a receive thread for 995a703e490SVasu Dev */ 996a703e490SVasu Dev static void fcoe_percpu_thread_create(unsigned int cpu) 997a703e490SVasu Dev { 998a703e490SVasu Dev struct fcoe_percpu_s *p; 999a703e490SVasu Dev struct task_struct *thread; 1000a703e490SVasu Dev 1001a703e490SVasu Dev p = &per_cpu(fcoe_percpu, cpu); 1002a703e490SVasu Dev 1003a703e490SVasu Dev thread = kthread_create(fcoe_percpu_receive_thread, 1004a703e490SVasu Dev (void *)p, "fcoethread/%d", cpu); 1005a703e490SVasu Dev 1006e7a51997SJoe Eykholt if (likely(!IS_ERR(thread))) { 1007a703e490SVasu Dev kthread_bind(thread, cpu); 1008a703e490SVasu Dev wake_up_process(thread); 1009a703e490SVasu Dev 1010a703e490SVasu Dev spin_lock_bh(&p->fcoe_rx_list.lock); 1011a703e490SVasu Dev p->thread = thread; 1012a703e490SVasu Dev spin_unlock_bh(&p->fcoe_rx_list.lock); 1013a703e490SVasu Dev } 1014a703e490SVasu Dev } 1015a703e490SVasu Dev 1016a703e490SVasu Dev /** 10171875f27eSRobert Love * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU 10181875f27eSRobert Love * @cpu: The CPU index of the CPU whose receive thread is to be destroyed 1019a703e490SVasu Dev * 1020a703e490SVasu Dev * Destroys a per-CPU Rx thread. Any pending skbs are moved to the 1021a703e490SVasu Dev * current CPU's Rx thread. If the thread being destroyed is bound to 1022a703e490SVasu Dev * the CPU processing this context the skbs will be freed. 1023a703e490SVasu Dev */ 1024a703e490SVasu Dev static void fcoe_percpu_thread_destroy(unsigned int cpu) 1025a703e490SVasu Dev { 1026a703e490SVasu Dev struct fcoe_percpu_s *p; 1027a703e490SVasu Dev struct task_struct *thread; 1028a703e490SVasu Dev struct page *crc_eof; 1029a703e490SVasu Dev struct sk_buff *skb; 1030a703e490SVasu Dev #ifdef CONFIG_SMP 1031a703e490SVasu Dev struct fcoe_percpu_s *p0; 1032a703e490SVasu Dev unsigned targ_cpu = smp_processor_id(); 1033a703e490SVasu Dev #endif /* CONFIG_SMP */ 1034a703e490SVasu Dev 1035d5488eb9SRobert Love FCOE_DBG("Destroying receive thread for CPU %d\n", cpu); 1036a703e490SVasu Dev 1037a703e490SVasu Dev /* Prevent any new skbs from being queued for this CPU. */ 1038a703e490SVasu Dev p = &per_cpu(fcoe_percpu, cpu); 1039a703e490SVasu Dev spin_lock_bh(&p->fcoe_rx_list.lock); 1040a703e490SVasu Dev thread = p->thread; 1041a703e490SVasu Dev p->thread = NULL; 1042a703e490SVasu Dev crc_eof = p->crc_eof_page; 1043a703e490SVasu Dev p->crc_eof_page = NULL; 1044a703e490SVasu Dev p->crc_eof_offset = 0; 1045a703e490SVasu Dev spin_unlock_bh(&p->fcoe_rx_list.lock); 1046a703e490SVasu Dev 1047a703e490SVasu Dev #ifdef CONFIG_SMP 1048a703e490SVasu Dev /* 1049a703e490SVasu Dev * Don't bother moving the skb's if this context is running 1050a703e490SVasu Dev * on the same CPU that is having its thread destroyed. This 1051a703e490SVasu Dev * can easily happen when the module is removed. 1052a703e490SVasu Dev */ 1053a703e490SVasu Dev if (cpu != targ_cpu) { 1054a703e490SVasu Dev p0 = &per_cpu(fcoe_percpu, targ_cpu); 1055a703e490SVasu Dev spin_lock_bh(&p0->fcoe_rx_list.lock); 1056a703e490SVasu Dev if (p0->thread) { 1057d5488eb9SRobert Love FCOE_DBG("Moving frames from CPU %d to CPU %d\n", 1058a703e490SVasu Dev cpu, targ_cpu); 1059a703e490SVasu Dev 1060a703e490SVasu Dev while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) 1061a703e490SVasu Dev __skb_queue_tail(&p0->fcoe_rx_list, skb); 1062a703e490SVasu Dev spin_unlock_bh(&p0->fcoe_rx_list.lock); 1063a703e490SVasu Dev } else { 1064a703e490SVasu Dev /* 1065a703e490SVasu Dev * The targeted CPU is not initialized and cannot accept 1066a703e490SVasu Dev * new skbs. Unlock the targeted CPU and drop the skbs 1067a703e490SVasu Dev * on the CPU that is going offline. 1068a703e490SVasu Dev */ 1069a703e490SVasu Dev while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) 1070a703e490SVasu Dev kfree_skb(skb); 1071a703e490SVasu Dev spin_unlock_bh(&p0->fcoe_rx_list.lock); 1072a703e490SVasu Dev } 1073a703e490SVasu Dev } else { 1074a703e490SVasu Dev /* 1075a703e490SVasu Dev * This scenario occurs when the module is being removed 1076a703e490SVasu Dev * and all threads are being destroyed. skbs will continue 1077a703e490SVasu Dev * to be shifted from the CPU thread that is being removed 1078a703e490SVasu Dev * to the CPU thread associated with the CPU that is processing 1079a703e490SVasu Dev * the module removal. Once there is only one CPU Rx thread it 1080a703e490SVasu Dev * will reach this case and we will drop all skbs and later 1081a703e490SVasu Dev * stop the thread. 1082a703e490SVasu Dev */ 1083a703e490SVasu Dev spin_lock_bh(&p->fcoe_rx_list.lock); 1084a703e490SVasu Dev while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) 1085a703e490SVasu Dev kfree_skb(skb); 1086a703e490SVasu Dev spin_unlock_bh(&p->fcoe_rx_list.lock); 1087a703e490SVasu Dev } 1088a703e490SVasu Dev #else 1089a703e490SVasu Dev /* 1090dd3fd72eSChris Leech * This a non-SMP scenario where the singular Rx thread is 1091a703e490SVasu Dev * being removed. Free all skbs and stop the thread. 1092a703e490SVasu Dev */ 1093a703e490SVasu Dev spin_lock_bh(&p->fcoe_rx_list.lock); 1094a703e490SVasu Dev while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) 1095a703e490SVasu Dev kfree_skb(skb); 1096a703e490SVasu Dev spin_unlock_bh(&p->fcoe_rx_list.lock); 1097a703e490SVasu Dev #endif 1098a703e490SVasu Dev 1099a703e490SVasu Dev if (thread) 1100a703e490SVasu Dev kthread_stop(thread); 1101a703e490SVasu Dev 1102a703e490SVasu Dev if (crc_eof) 1103a703e490SVasu Dev put_page(crc_eof); 1104a703e490SVasu Dev } 1105a703e490SVasu Dev 1106a703e490SVasu Dev /** 11071875f27eSRobert Love * fcoe_cpu_callback() - Handler for CPU hotplug events 11081875f27eSRobert Love * @nfb: The callback data block 11091875f27eSRobert Love * @action: The event triggering the callback 11101875f27eSRobert Love * @hcpu: The index of the CPU that the event is for 1111a703e490SVasu Dev * 11121875f27eSRobert Love * This creates or destroys per-CPU data for fcoe 1113a703e490SVasu Dev * 1114a703e490SVasu Dev * Returns NOTIFY_OK always. 1115a703e490SVasu Dev */ 1116a703e490SVasu Dev static int fcoe_cpu_callback(struct notifier_block *nfb, 1117a703e490SVasu Dev unsigned long action, void *hcpu) 1118a703e490SVasu Dev { 1119a703e490SVasu Dev unsigned cpu = (unsigned long)hcpu; 1120a703e490SVasu Dev 1121a703e490SVasu Dev switch (action) { 1122a703e490SVasu Dev case CPU_ONLINE: 1123a703e490SVasu Dev case CPU_ONLINE_FROZEN: 1124d5488eb9SRobert Love FCOE_DBG("CPU %x online: Create Rx thread\n", cpu); 1125a703e490SVasu Dev fcoe_percpu_thread_create(cpu); 1126a703e490SVasu Dev break; 1127a703e490SVasu Dev case CPU_DEAD: 1128a703e490SVasu Dev case CPU_DEAD_FROZEN: 1129d5488eb9SRobert Love FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu); 1130a703e490SVasu Dev fcoe_percpu_thread_destroy(cpu); 1131a703e490SVasu Dev break; 1132a703e490SVasu Dev default: 1133a703e490SVasu Dev break; 1134a703e490SVasu Dev } 1135a703e490SVasu Dev return NOTIFY_OK; 1136a703e490SVasu Dev } 1137a703e490SVasu Dev 1138a703e490SVasu Dev /** 11391875f27eSRobert Love * fcoe_rcv() - Receive packets from a net device 11401875f27eSRobert Love * @skb: The received packet 11411875f27eSRobert Love * @netdev: The net device that the packet was received on 11421875f27eSRobert Love * @ptype: The packet type context 11431875f27eSRobert Love * @olddev: The last device net device 1144a703e490SVasu Dev * 11451875f27eSRobert Love * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a 11461875f27eSRobert Love * FC frame and passes the frame to libfc. 1147a703e490SVasu Dev * 1148a703e490SVasu Dev * Returns: 0 for success 1149a703e490SVasu Dev */ 11501875f27eSRobert Love int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, 1151a703e490SVasu Dev struct packet_type *ptype, struct net_device *olddev) 1152a703e490SVasu Dev { 11531875f27eSRobert Love struct fc_lport *lport; 1154a703e490SVasu Dev struct fcoe_rcv_info *fr; 1155259ad85dSChris Leech struct fcoe_interface *fcoe; 1156a703e490SVasu Dev struct fc_frame_header *fh; 1157a703e490SVasu Dev struct fcoe_percpu_s *fps; 1158b2f0091fSVasu Dev unsigned int cpu; 1159a703e490SVasu Dev 1160259ad85dSChris Leech fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); 11611875f27eSRobert Love lport = fcoe->ctlr.lp; 11621875f27eSRobert Love if (unlikely(!lport)) { 11631875f27eSRobert Love FCOE_NETDEV_DBG(netdev, "Cannot find hba structure"); 1164a703e490SVasu Dev goto err2; 1165a703e490SVasu Dev } 11661875f27eSRobert Love if (!lport->link_up) 116797c8389dSJoe Eykholt goto err2; 1168a703e490SVasu Dev 11691875f27eSRobert Love FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p " 1170d5488eb9SRobert Love "data:%p tail:%p end:%p sum:%d dev:%s", 1171d5488eb9SRobert Love skb->len, skb->data_len, skb->head, skb->data, 1172d5488eb9SRobert Love skb_tail_pointer(skb), skb_end_pointer(skb), 1173d5488eb9SRobert Love skb->csum, skb->dev ? skb->dev->name : "<NULL>"); 1174a703e490SVasu Dev 1175a703e490SVasu Dev /* check for FCOE packet type */ 1176a703e490SVasu Dev if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) { 11771875f27eSRobert Love FCOE_NETDEV_DBG(netdev, "Wrong FC type frame"); 1178a703e490SVasu Dev goto err; 1179a703e490SVasu Dev } 1180a703e490SVasu Dev 1181a703e490SVasu Dev /* 1182a703e490SVasu Dev * Check for minimum frame length, and make sure required FCoE 1183a703e490SVasu Dev * and FC headers are pulled into the linear data area. 1184a703e490SVasu Dev */ 1185a703e490SVasu Dev if (unlikely((skb->len < FCOE_MIN_FRAME) || 1186a703e490SVasu Dev !pskb_may_pull(skb, FCOE_HEADER_LEN))) 1187a703e490SVasu Dev goto err; 1188a703e490SVasu Dev 1189a703e490SVasu Dev skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); 1190a703e490SVasu Dev fh = (struct fc_frame_header *) skb_transport_header(skb); 1191a703e490SVasu Dev 1192a703e490SVasu Dev fr = fcoe_dev_from_skb(skb); 11931875f27eSRobert Love fr->fr_dev = lport; 1194a703e490SVasu Dev fr->ptype = ptype; 1195a703e490SVasu Dev 1196a703e490SVasu Dev /* 1197b2f0091fSVasu Dev * In case the incoming frame's exchange is originated from 1198b2f0091fSVasu Dev * the initiator, then received frame's exchange id is ANDed 1199b2f0091fSVasu Dev * with fc_cpu_mask bits to get the same cpu on which exchange 1200b2f0091fSVasu Dev * was originated, otherwise just use the current cpu. 1201a703e490SVasu Dev */ 1202b2f0091fSVasu Dev if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) 1203b2f0091fSVasu Dev cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; 1204b2f0091fSVasu Dev else 1205b2f0091fSVasu Dev cpu = smp_processor_id(); 1206a703e490SVasu Dev 1207a703e490SVasu Dev fps = &per_cpu(fcoe_percpu, cpu); 1208a703e490SVasu Dev spin_lock_bh(&fps->fcoe_rx_list.lock); 1209a703e490SVasu Dev if (unlikely(!fps->thread)) { 1210a703e490SVasu Dev /* 1211a703e490SVasu Dev * The targeted CPU is not ready, let's target 1212a703e490SVasu Dev * the first CPU now. For non-SMP systems this 1213a703e490SVasu Dev * will check the same CPU twice. 1214a703e490SVasu Dev */ 12151875f27eSRobert Love FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread " 1216d5488eb9SRobert Love "ready for incoming skb- using first online " 1217d5488eb9SRobert Love "CPU.\n"); 1218a703e490SVasu Dev 1219a703e490SVasu Dev spin_unlock_bh(&fps->fcoe_rx_list.lock); 1220a703e490SVasu Dev cpu = first_cpu(cpu_online_map); 1221a703e490SVasu Dev fps = &per_cpu(fcoe_percpu, cpu); 1222a703e490SVasu Dev spin_lock_bh(&fps->fcoe_rx_list.lock); 1223a703e490SVasu Dev if (!fps->thread) { 1224a703e490SVasu Dev spin_unlock_bh(&fps->fcoe_rx_list.lock); 1225a703e490SVasu Dev goto err; 1226a703e490SVasu Dev } 1227a703e490SVasu Dev } 1228a703e490SVasu Dev 1229a703e490SVasu Dev /* 1230a703e490SVasu Dev * We now have a valid CPU that we're targeting for 1231a703e490SVasu Dev * this skb. We also have this receive thread locked, 1232a703e490SVasu Dev * so we're free to queue skbs into it's queue. 1233a703e490SVasu Dev */ 1234a703e490SVasu Dev __skb_queue_tail(&fps->fcoe_rx_list, skb); 1235a703e490SVasu Dev if (fps->fcoe_rx_list.qlen == 1) 1236a703e490SVasu Dev wake_up_process(fps->thread); 1237a703e490SVasu Dev 1238a703e490SVasu Dev spin_unlock_bh(&fps->fcoe_rx_list.lock); 1239a703e490SVasu Dev 1240a703e490SVasu Dev return 0; 1241a703e490SVasu Dev err: 12421875f27eSRobert Love fc_lport_get_stats(lport)->ErrorFrames++; 1243a703e490SVasu Dev 1244a703e490SVasu Dev err2: 1245a703e490SVasu Dev kfree_skb(skb); 1246a703e490SVasu Dev return -1; 1247a703e490SVasu Dev } 1248a703e490SVasu Dev 1249a703e490SVasu Dev /** 12501875f27eSRobert Love * fcoe_start_io() - Start FCoE I/O 12511875f27eSRobert Love * @skb: The packet to be transmitted 12521875f27eSRobert Love * 12531875f27eSRobert Love * This routine is called from the net device to start transmitting 12541875f27eSRobert Love * FCoE packets. 1255a703e490SVasu Dev * 1256a703e490SVasu Dev * Returns: 0 for success 1257a703e490SVasu Dev */ 1258a703e490SVasu Dev static inline int fcoe_start_io(struct sk_buff *skb) 1259a703e490SVasu Dev { 1260a703e490SVasu Dev int rc; 1261a703e490SVasu Dev 1262a703e490SVasu Dev skb_get(skb); 1263a703e490SVasu Dev rc = dev_queue_xmit(skb); 1264a703e490SVasu Dev if (rc != 0) 1265a703e490SVasu Dev return rc; 1266a703e490SVasu Dev kfree_skb(skb); 1267a703e490SVasu Dev return 0; 1268a703e490SVasu Dev } 1269a703e490SVasu Dev 1270a703e490SVasu Dev /** 12711875f27eSRobert Love * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC 12721875f27eSRobert Love * @skb: The packet to be transmitted 12731875f27eSRobert Love * @tlen: The total length of the trailer 12741875f27eSRobert Love * 12751875f27eSRobert Love * This routine allocates a page for frame trailers. The page is re-used if 12761875f27eSRobert Love * there is enough room left on it for the current trailer. If there isn't 12771875f27eSRobert Love * enough buffer left a new page is allocated for the trailer. Reference to 12781875f27eSRobert Love * the page from this function as well as the skbs using the page fragments 12791875f27eSRobert Love * ensure that the page is freed at the appropriate time. 1280a703e490SVasu Dev * 1281a703e490SVasu Dev * Returns: 0 for success 1282a703e490SVasu Dev */ 1283a703e490SVasu Dev static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen) 1284a703e490SVasu Dev { 1285a703e490SVasu Dev struct fcoe_percpu_s *fps; 1286a703e490SVasu Dev struct page *page; 1287a703e490SVasu Dev 1288a703e490SVasu Dev fps = &get_cpu_var(fcoe_percpu); 1289a703e490SVasu Dev page = fps->crc_eof_page; 1290a703e490SVasu Dev if (!page) { 1291a703e490SVasu Dev page = alloc_page(GFP_ATOMIC); 1292a703e490SVasu Dev if (!page) { 1293a703e490SVasu Dev put_cpu_var(fcoe_percpu); 1294a703e490SVasu Dev return -ENOMEM; 1295a703e490SVasu Dev } 1296a703e490SVasu Dev fps->crc_eof_page = page; 1297a703e490SVasu Dev fps->crc_eof_offset = 0; 1298a703e490SVasu Dev } 1299a703e490SVasu Dev 1300a703e490SVasu Dev get_page(page); 1301a703e490SVasu Dev skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, 1302a703e490SVasu Dev fps->crc_eof_offset, tlen); 1303a703e490SVasu Dev skb->len += tlen; 1304a703e490SVasu Dev skb->data_len += tlen; 1305a703e490SVasu Dev skb->truesize += tlen; 1306a703e490SVasu Dev fps->crc_eof_offset += sizeof(struct fcoe_crc_eof); 1307a703e490SVasu Dev 1308a703e490SVasu Dev if (fps->crc_eof_offset >= PAGE_SIZE) { 1309a703e490SVasu Dev fps->crc_eof_page = NULL; 1310a703e490SVasu Dev fps->crc_eof_offset = 0; 1311a703e490SVasu Dev put_page(page); 1312a703e490SVasu Dev } 1313a703e490SVasu Dev put_cpu_var(fcoe_percpu); 1314a703e490SVasu Dev return 0; 1315a703e490SVasu Dev } 1316a703e490SVasu Dev 1317a703e490SVasu Dev /** 13181875f27eSRobert Love * fcoe_fc_crc() - Calculates the CRC for a given frame 13191875f27eSRobert Love * @fp: The frame to be checksumed 1320a703e490SVasu Dev * 13211875f27eSRobert Love * This uses crc32() routine to calculate the CRC for a frame 13221875f27eSRobert Love * 13231875f27eSRobert Love * Return: The 32 bit CRC value 1324a703e490SVasu Dev */ 1325a703e490SVasu Dev u32 fcoe_fc_crc(struct fc_frame *fp) 1326a703e490SVasu Dev { 1327a703e490SVasu Dev struct sk_buff *skb = fp_skb(fp); 1328a703e490SVasu Dev struct skb_frag_struct *frag; 1329a703e490SVasu Dev unsigned char *data; 1330a703e490SVasu Dev unsigned long off, len, clen; 1331a703e490SVasu Dev u32 crc; 1332a703e490SVasu Dev unsigned i; 1333a703e490SVasu Dev 1334a703e490SVasu Dev crc = crc32(~0, skb->data, skb_headlen(skb)); 1335a703e490SVasu Dev 1336a703e490SVasu Dev for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1337a703e490SVasu Dev frag = &skb_shinfo(skb)->frags[i]; 1338a703e490SVasu Dev off = frag->page_offset; 1339a703e490SVasu Dev len = frag->size; 1340a703e490SVasu Dev while (len > 0) { 1341a703e490SVasu Dev clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK)); 1342a703e490SVasu Dev data = kmap_atomic(frag->page + (off >> PAGE_SHIFT), 1343a703e490SVasu Dev KM_SKB_DATA_SOFTIRQ); 1344a703e490SVasu Dev crc = crc32(crc, data + (off & ~PAGE_MASK), clen); 1345a703e490SVasu Dev kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ); 1346a703e490SVasu Dev off += clen; 1347a703e490SVasu Dev len -= clen; 1348a703e490SVasu Dev } 1349a703e490SVasu Dev } 1350a703e490SVasu Dev return crc; 1351a703e490SVasu Dev } 1352a703e490SVasu Dev 1353a703e490SVasu Dev /** 13541875f27eSRobert Love * fcoe_xmit() - Transmit a FCoE frame 13551875f27eSRobert Love * @lport: The local port that the frame is to be transmitted for 13561875f27eSRobert Love * @fp: The frame to be transmitted 1357a703e490SVasu Dev * 1358a703e490SVasu Dev * Return: 0 for success 1359a703e490SVasu Dev */ 13601875f27eSRobert Love int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) 1361a703e490SVasu Dev { 13624bb6b515SVasu Dev int wlen; 1363a703e490SVasu Dev u32 crc; 1364a703e490SVasu Dev struct ethhdr *eh; 1365a703e490SVasu Dev struct fcoe_crc_eof *cp; 1366a703e490SVasu Dev struct sk_buff *skb; 1367a703e490SVasu Dev struct fcoe_dev_stats *stats; 1368a703e490SVasu Dev struct fc_frame_header *fh; 1369a703e490SVasu Dev unsigned int hlen; /* header length implies the version */ 1370a703e490SVasu Dev unsigned int tlen; /* trailer length */ 1371a703e490SVasu Dev unsigned int elen; /* eth header, may include vlan */ 13721875f27eSRobert Love struct fcoe_port *port = lport_priv(lport); 13733fe9a0baSChris Leech struct fcoe_interface *fcoe = port->fcoe; 1374a703e490SVasu Dev u8 sof, eof; 1375a703e490SVasu Dev struct fcoe_hdr *hp; 1376a703e490SVasu Dev 1377a703e490SVasu Dev WARN_ON((fr_len(fp) % sizeof(u32)) != 0); 1378a703e490SVasu Dev 1379a703e490SVasu Dev fh = fc_frame_header_get(fp); 138097c8389dSJoe Eykholt skb = fp_skb(fp); 138197c8389dSJoe Eykholt wlen = skb->len / FCOE_WORD_TO_BYTE; 138297c8389dSJoe Eykholt 13831875f27eSRobert Love if (!lport->link_up) { 13843caf02eeSDan Carpenter kfree_skb(skb); 138597c8389dSJoe Eykholt return 0; 1386a703e490SVasu Dev } 1387a703e490SVasu Dev 138897c8389dSJoe Eykholt if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) && 13891875f27eSRobert Love fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb)) 139097c8389dSJoe Eykholt return 0; 139197c8389dSJoe Eykholt 1392a703e490SVasu Dev sof = fr_sof(fp); 1393a703e490SVasu Dev eof = fr_eof(fp); 1394a703e490SVasu Dev 13954e57e1cbSVasu Dev elen = sizeof(struct ethhdr); 1396a703e490SVasu Dev hlen = sizeof(struct fcoe_hdr); 1397a703e490SVasu Dev tlen = sizeof(struct fcoe_crc_eof); 1398a703e490SVasu Dev wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; 1399a703e490SVasu Dev 1400a703e490SVasu Dev /* crc offload */ 14011875f27eSRobert Love if (likely(lport->crc_offload)) { 1402a703e490SVasu Dev skb->ip_summed = CHECKSUM_PARTIAL; 1403a703e490SVasu Dev skb->csum_start = skb_headroom(skb); 1404a703e490SVasu Dev skb->csum_offset = skb->len; 1405a703e490SVasu Dev crc = 0; 1406a703e490SVasu Dev } else { 1407a703e490SVasu Dev skb->ip_summed = CHECKSUM_NONE; 1408a703e490SVasu Dev crc = fcoe_fc_crc(fp); 1409a703e490SVasu Dev } 1410a703e490SVasu Dev 1411014f5c3fSChris Leech /* copy port crc and eof to the skb buff */ 1412a703e490SVasu Dev if (skb_is_nonlinear(skb)) { 1413a703e490SVasu Dev skb_frag_t *frag; 1414a703e490SVasu Dev if (fcoe_get_paged_crc_eof(skb, tlen)) { 1415a703e490SVasu Dev kfree_skb(skb); 1416a703e490SVasu Dev return -ENOMEM; 1417a703e490SVasu Dev } 1418a703e490SVasu Dev frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; 1419a703e490SVasu Dev cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ) 1420a703e490SVasu Dev + frag->page_offset; 1421a703e490SVasu Dev } else { 1422a703e490SVasu Dev cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); 1423a703e490SVasu Dev } 1424a703e490SVasu Dev 1425a703e490SVasu Dev memset(cp, 0, sizeof(*cp)); 1426a703e490SVasu Dev cp->fcoe_eof = eof; 1427a703e490SVasu Dev cp->fcoe_crc32 = cpu_to_le32(~crc); 1428a703e490SVasu Dev 1429a703e490SVasu Dev if (skb_is_nonlinear(skb)) { 1430a703e490SVasu Dev kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ); 1431a703e490SVasu Dev cp = NULL; 1432a703e490SVasu Dev } 1433a703e490SVasu Dev 1434014f5c3fSChris Leech /* adjust skb network/transport offsets to match mac/fcoe/port */ 1435a703e490SVasu Dev skb_push(skb, elen + hlen); 1436a703e490SVasu Dev skb_reset_mac_header(skb); 1437a703e490SVasu Dev skb_reset_network_header(skb); 1438a703e490SVasu Dev skb->mac_len = elen; 1439a703e490SVasu Dev skb->protocol = htons(ETH_P_FCOE); 14403fe9a0baSChris Leech skb->dev = fcoe->netdev; 1441a703e490SVasu Dev 1442a703e490SVasu Dev /* fill up mac and fcoe headers */ 1443a703e490SVasu Dev eh = eth_hdr(skb); 1444a703e490SVasu Dev eh->h_proto = htons(ETH_P_FCOE); 14453fe9a0baSChris Leech if (fcoe->ctlr.map_dest) 1446a703e490SVasu Dev fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id); 1447a703e490SVasu Dev else 1448a703e490SVasu Dev /* insert GW address */ 14493fe9a0baSChris Leech memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN); 1450a703e490SVasu Dev 14513fe9a0baSChris Leech if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN)) 14523fe9a0baSChris Leech memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN); 1453a703e490SVasu Dev else 145411b56188SChris Leech memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); 1455a703e490SVasu Dev 1456a703e490SVasu Dev hp = (struct fcoe_hdr *)(eh + 1); 1457a703e490SVasu Dev memset(hp, 0, sizeof(*hp)); 1458a703e490SVasu Dev if (FC_FCOE_VER) 1459a703e490SVasu Dev FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); 1460a703e490SVasu Dev hp->fcoe_sof = sof; 1461a703e490SVasu Dev 1462a703e490SVasu Dev /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ 14631875f27eSRobert Love if (lport->seq_offload && fr_max_payload(fp)) { 1464a703e490SVasu Dev skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; 1465a703e490SVasu Dev skb_shinfo(skb)->gso_size = fr_max_payload(fp); 1466a703e490SVasu Dev } else { 1467a703e490SVasu Dev skb_shinfo(skb)->gso_type = 0; 1468a703e490SVasu Dev skb_shinfo(skb)->gso_size = 0; 1469a703e490SVasu Dev } 1470a703e490SVasu Dev /* update tx stats: regardless if LLD fails */ 14711875f27eSRobert Love stats = fc_lport_get_stats(lport); 1472a703e490SVasu Dev stats->TxFrames++; 1473a703e490SVasu Dev stats->TxWords += wlen; 1474a703e490SVasu Dev 1475a703e490SVasu Dev /* send down to lld */ 14761875f27eSRobert Love fr_dev(fp) = lport; 1477014f5c3fSChris Leech if (port->fcoe_pending_queue.qlen) 14781875f27eSRobert Love fcoe_check_wait_queue(lport, skb); 14794bb6b515SVasu Dev else if (fcoe_start_io(skb)) 14801875f27eSRobert Love fcoe_check_wait_queue(lport, skb); 1481a703e490SVasu Dev 1482a703e490SVasu Dev return 0; 1483a703e490SVasu Dev } 1484a703e490SVasu Dev 1485a703e490SVasu Dev /** 14861875f27eSRobert Love * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion 14871875f27eSRobert Love * @skb: The completed skb (argument required by destructor) 1488e7a51997SJoe Eykholt */ 1489e7a51997SJoe Eykholt static void fcoe_percpu_flush_done(struct sk_buff *skb) 1490e7a51997SJoe Eykholt { 1491e7a51997SJoe Eykholt complete(&fcoe_flush_completion); 1492e7a51997SJoe Eykholt } 1493e7a51997SJoe Eykholt 1494e7a51997SJoe Eykholt /** 14951875f27eSRobert Love * fcoe_percpu_receive_thread() - The per-CPU packet receive thread 14961875f27eSRobert Love * @arg: The per-CPU context 1497a703e490SVasu Dev * 1498a703e490SVasu Dev * Return: 0 for success 1499a703e490SVasu Dev */ 1500a703e490SVasu Dev int fcoe_percpu_receive_thread(void *arg) 1501a703e490SVasu Dev { 1502a703e490SVasu Dev struct fcoe_percpu_s *p = arg; 1503a703e490SVasu Dev u32 fr_len; 15041875f27eSRobert Love struct fc_lport *lport; 1505a703e490SVasu Dev struct fcoe_rcv_info *fr; 1506a703e490SVasu Dev struct fcoe_dev_stats *stats; 1507a703e490SVasu Dev struct fc_frame_header *fh; 1508a703e490SVasu Dev struct sk_buff *skb; 1509a703e490SVasu Dev struct fcoe_crc_eof crc_eof; 1510a703e490SVasu Dev struct fc_frame *fp; 1511a703e490SVasu Dev u8 *mac = NULL; 1512014f5c3fSChris Leech struct fcoe_port *port; 1513a703e490SVasu Dev struct fcoe_hdr *hp; 1514a703e490SVasu Dev 1515a703e490SVasu Dev set_user_nice(current, -20); 1516a703e490SVasu Dev 1517a703e490SVasu Dev while (!kthread_should_stop()) { 1518a703e490SVasu Dev 1519a703e490SVasu Dev spin_lock_bh(&p->fcoe_rx_list.lock); 1520a703e490SVasu Dev while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) { 1521a703e490SVasu Dev set_current_state(TASK_INTERRUPTIBLE); 1522a703e490SVasu Dev spin_unlock_bh(&p->fcoe_rx_list.lock); 1523a703e490SVasu Dev schedule(); 1524a703e490SVasu Dev set_current_state(TASK_RUNNING); 1525a703e490SVasu Dev if (kthread_should_stop()) 1526a703e490SVasu Dev return 0; 1527a703e490SVasu Dev spin_lock_bh(&p->fcoe_rx_list.lock); 1528a703e490SVasu Dev } 1529a703e490SVasu Dev spin_unlock_bh(&p->fcoe_rx_list.lock); 1530a703e490SVasu Dev fr = fcoe_dev_from_skb(skb); 15311875f27eSRobert Love lport = fr->fr_dev; 15321875f27eSRobert Love if (unlikely(!lport)) { 1533e7a51997SJoe Eykholt if (skb->destructor != fcoe_percpu_flush_done) 1534e7a51997SJoe Eykholt FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb"); 1535a703e490SVasu Dev kfree_skb(skb); 1536a703e490SVasu Dev continue; 1537a703e490SVasu Dev } 1538a703e490SVasu Dev 1539d5488eb9SRobert Love FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d " 1540d5488eb9SRobert Love "head:%p data:%p tail:%p end:%p sum:%d dev:%s", 1541a703e490SVasu Dev skb->len, skb->data_len, 1542a703e490SVasu Dev skb->head, skb->data, skb_tail_pointer(skb), 1543a703e490SVasu Dev skb_end_pointer(skb), skb->csum, 1544a703e490SVasu Dev skb->dev ? skb->dev->name : "<NULL>"); 1545a703e490SVasu Dev 1546a703e490SVasu Dev /* 1547a703e490SVasu Dev * Save source MAC address before discarding header. 1548a703e490SVasu Dev */ 15491875f27eSRobert Love port = lport_priv(lport); 1550a703e490SVasu Dev if (skb_is_nonlinear(skb)) 1551a703e490SVasu Dev skb_linearize(skb); /* not ideal */ 155297c8389dSJoe Eykholt mac = eth_hdr(skb)->h_source; 1553a703e490SVasu Dev 1554a703e490SVasu Dev /* 1555a703e490SVasu Dev * Frame length checks and setting up the header pointers 1556a703e490SVasu Dev * was done in fcoe_rcv already. 1557a703e490SVasu Dev */ 1558a703e490SVasu Dev hp = (struct fcoe_hdr *) skb_network_header(skb); 1559a703e490SVasu Dev fh = (struct fc_frame_header *) skb_transport_header(skb); 1560a703e490SVasu Dev 15611875f27eSRobert Love stats = fc_lport_get_stats(lport); 1562a703e490SVasu Dev if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { 1563a703e490SVasu Dev if (stats->ErrorFrames < 5) 1564d5488eb9SRobert Love printk(KERN_WARNING "fcoe: FCoE version " 1565a703e490SVasu Dev "mismatch: The frame has " 1566a703e490SVasu Dev "version %x, but the " 1567a703e490SVasu Dev "initiator supports version " 1568a703e490SVasu Dev "%x\n", FC_FCOE_DECAPS_VER(hp), 1569a703e490SVasu Dev FC_FCOE_VER); 1570a703e490SVasu Dev stats->ErrorFrames++; 1571a703e490SVasu Dev kfree_skb(skb); 1572a703e490SVasu Dev continue; 1573a703e490SVasu Dev } 1574a703e490SVasu Dev 1575a703e490SVasu Dev skb_pull(skb, sizeof(struct fcoe_hdr)); 1576a703e490SVasu Dev fr_len = skb->len - sizeof(struct fcoe_crc_eof); 1577a703e490SVasu Dev 1578a703e490SVasu Dev stats->RxFrames++; 1579a703e490SVasu Dev stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; 1580a703e490SVasu Dev 1581a703e490SVasu Dev fp = (struct fc_frame *)skb; 1582a703e490SVasu Dev fc_frame_init(fp); 15831875f27eSRobert Love fr_dev(fp) = lport; 1584a703e490SVasu Dev fr_sof(fp) = hp->fcoe_sof; 1585a703e490SVasu Dev 1586a703e490SVasu Dev /* Copy out the CRC and EOF trailer for access */ 1587a703e490SVasu Dev if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) { 1588a703e490SVasu Dev kfree_skb(skb); 1589a703e490SVasu Dev continue; 1590a703e490SVasu Dev } 1591a703e490SVasu Dev fr_eof(fp) = crc_eof.fcoe_eof; 1592a703e490SVasu Dev fr_crc(fp) = crc_eof.fcoe_crc32; 1593a703e490SVasu Dev if (pskb_trim(skb, fr_len)) { 1594a703e490SVasu Dev kfree_skb(skb); 1595a703e490SVasu Dev continue; 1596a703e490SVasu Dev } 1597a703e490SVasu Dev 1598a703e490SVasu Dev /* 1599a703e490SVasu Dev * We only check CRC if no offload is available and if it is 1600a703e490SVasu Dev * it's solicited data, in which case, the FCP layer would 1601a703e490SVasu Dev * check it during the copy. 1602a703e490SVasu Dev */ 16031875f27eSRobert Love if (lport->crc_offload && 16041875f27eSRobert Love skb->ip_summed == CHECKSUM_UNNECESSARY) 1605a703e490SVasu Dev fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 1606a703e490SVasu Dev else 1607a703e490SVasu Dev fr_flags(fp) |= FCPHF_CRC_UNCHECKED; 1608a703e490SVasu Dev 1609a703e490SVasu Dev fh = fc_frame_header_get(fp); 1610a703e490SVasu Dev if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && 1611a703e490SVasu Dev fh->fh_type == FC_TYPE_FCP) { 16121875f27eSRobert Love fc_exch_recv(lport, fp); 1613a703e490SVasu Dev continue; 1614a703e490SVasu Dev } 1615a703e490SVasu Dev if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) { 1616a703e490SVasu Dev if (le32_to_cpu(fr_crc(fp)) != 1617a703e490SVasu Dev ~crc32(~0, skb->data, fr_len)) { 1618d5488eb9SRobert Love if (stats->InvalidCRCCount < 5) 1619a703e490SVasu Dev printk(KERN_WARNING "fcoe: dropping " 1620a703e490SVasu Dev "frame with CRC error\n"); 1621a703e490SVasu Dev stats->InvalidCRCCount++; 1622a703e490SVasu Dev stats->ErrorFrames++; 1623a703e490SVasu Dev fc_frame_free(fp); 1624a703e490SVasu Dev continue; 1625a703e490SVasu Dev } 1626a703e490SVasu Dev fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 1627a703e490SVasu Dev } 16281875f27eSRobert Love fc_exch_recv(lport, fp); 1629a703e490SVasu Dev } 1630a703e490SVasu Dev return 0; 1631a703e490SVasu Dev } 1632a703e490SVasu Dev 1633a703e490SVasu Dev /** 16341875f27eSRobert Love * fcoe_check_wait_queue() - Attempt to clear the transmit backlog 16351875f27eSRobert Love * @lport: The local port whose backlog is to be cleared 1636a703e490SVasu Dev * 16371875f27eSRobert Love * This empties the wait_queue, dequeues the head of the wait_queue queue 16381875f27eSRobert Love * and calls fcoe_start_io() for each packet. If all skb have been 16391875f27eSRobert Love * transmitted it returns the qlen. If an error occurs it restores 16401875f27eSRobert Love * wait_queue (to try again later) and returns -1. 1641a703e490SVasu Dev * 16421875f27eSRobert Love * The wait_queue is used when the skb transmit fails. The failed skb 16431875f27eSRobert Love * will go in the wait_queue which will be emptied by the timer function or 1644a703e490SVasu Dev * by the next skb transmit. 1645a703e490SVasu Dev */ 16461875f27eSRobert Love static void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb) 1647a703e490SVasu Dev { 16481875f27eSRobert Love struct fcoe_port *port = lport_priv(lport); 16494bb6b515SVasu Dev int rc; 1650a703e490SVasu Dev 1651014f5c3fSChris Leech spin_lock_bh(&port->fcoe_pending_queue.lock); 16524bb6b515SVasu Dev 16534bb6b515SVasu Dev if (skb) 1654014f5c3fSChris Leech __skb_queue_tail(&port->fcoe_pending_queue, skb); 16554bb6b515SVasu Dev 1656014f5c3fSChris Leech if (port->fcoe_pending_queue_active) 1657a703e490SVasu Dev goto out; 1658014f5c3fSChris Leech port->fcoe_pending_queue_active = 1; 1659a703e490SVasu Dev 1660014f5c3fSChris Leech while (port->fcoe_pending_queue.qlen) { 1661a703e490SVasu Dev /* keep qlen > 0 until fcoe_start_io succeeds */ 1662014f5c3fSChris Leech port->fcoe_pending_queue.qlen++; 1663014f5c3fSChris Leech skb = __skb_dequeue(&port->fcoe_pending_queue); 1664a703e490SVasu Dev 1665014f5c3fSChris Leech spin_unlock_bh(&port->fcoe_pending_queue.lock); 1666a703e490SVasu Dev rc = fcoe_start_io(skb); 1667014f5c3fSChris Leech spin_lock_bh(&port->fcoe_pending_queue.lock); 1668a703e490SVasu Dev 1669a703e490SVasu Dev if (rc) { 1670014f5c3fSChris Leech __skb_queue_head(&port->fcoe_pending_queue, skb); 1671a703e490SVasu Dev /* undo temporary increment above */ 1672014f5c3fSChris Leech port->fcoe_pending_queue.qlen--; 1673a703e490SVasu Dev break; 1674a703e490SVasu Dev } 1675a703e490SVasu Dev /* undo temporary increment above */ 1676014f5c3fSChris Leech port->fcoe_pending_queue.qlen--; 1677a703e490SVasu Dev } 1678a703e490SVasu Dev 1679014f5c3fSChris Leech if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH) 16801875f27eSRobert Love lport->qfull = 0; 1681014f5c3fSChris Leech if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer)) 1682014f5c3fSChris Leech mod_timer(&port->timer, jiffies + 2); 1683014f5c3fSChris Leech port->fcoe_pending_queue_active = 0; 1684a703e490SVasu Dev out: 1685014f5c3fSChris Leech if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH) 16861875f27eSRobert Love lport->qfull = 1; 1687014f5c3fSChris Leech spin_unlock_bh(&port->fcoe_pending_queue.lock); 16884bb6b515SVasu Dev return; 1689a703e490SVasu Dev } 1690a703e490SVasu Dev 1691a703e490SVasu Dev /** 16921875f27eSRobert Love * fcoe_dev_setup() - Setup the link change notification interface 1693a703e490SVasu Dev */ 1694b0d428adSRandy Dunlap static void fcoe_dev_setup(void) 1695a703e490SVasu Dev { 1696a703e490SVasu Dev register_netdevice_notifier(&fcoe_notifier); 1697a703e490SVasu Dev } 1698a703e490SVasu Dev 1699a703e490SVasu Dev /** 17001875f27eSRobert Love * fcoe_dev_cleanup() - Cleanup the link change notification interface 1701a703e490SVasu Dev */ 1702a703e490SVasu Dev static void fcoe_dev_cleanup(void) 1703a703e490SVasu Dev { 1704a703e490SVasu Dev unregister_netdevice_notifier(&fcoe_notifier); 1705a703e490SVasu Dev } 1706a703e490SVasu Dev 1707a703e490SVasu Dev /** 17081875f27eSRobert Love * fcoe_device_notification() - Handler for net device events 17091875f27eSRobert Love * @notifier: The context of the notification 17101875f27eSRobert Love * @event: The type of event 17111875f27eSRobert Love * @ptr: The net device that the event was on 1712a703e490SVasu Dev * 17131875f27eSRobert Love * This function is called by the Ethernet driver in case of link change event. 1714a703e490SVasu Dev * 1715a703e490SVasu Dev * Returns: 0 for success 1716a703e490SVasu Dev */ 1717a703e490SVasu Dev static int fcoe_device_notification(struct notifier_block *notifier, 1718a703e490SVasu Dev ulong event, void *ptr) 1719a703e490SVasu Dev { 17201875f27eSRobert Love struct fc_lport *lport = NULL; 17211d1b88dcSVasu Dev struct net_device *netdev = ptr; 1722014f5c3fSChris Leech struct fcoe_interface *fcoe; 17232e70e241SChris Leech struct fcoe_port *port; 1724a703e490SVasu Dev struct fcoe_dev_stats *stats; 172597c8389dSJoe Eykholt u32 link_possible = 1; 1726a703e490SVasu Dev u32 mfs; 1727a703e490SVasu Dev int rc = NOTIFY_OK; 1728a703e490SVasu Dev 1729014f5c3fSChris Leech list_for_each_entry(fcoe, &fcoe_hostlist, list) { 173025024989SChris Leech if (fcoe->netdev == netdev) { 17311875f27eSRobert Love lport = fcoe->ctlr.lp; 1732a703e490SVasu Dev break; 1733a703e490SVasu Dev } 1734a703e490SVasu Dev } 17351875f27eSRobert Love if (!lport) { 1736a703e490SVasu Dev rc = NOTIFY_DONE; 1737a703e490SVasu Dev goto out; 1738a703e490SVasu Dev } 1739a703e490SVasu Dev 1740a703e490SVasu Dev switch (event) { 1741a703e490SVasu Dev case NETDEV_DOWN: 1742a703e490SVasu Dev case NETDEV_GOING_DOWN: 174397c8389dSJoe Eykholt link_possible = 0; 1744a703e490SVasu Dev break; 1745a703e490SVasu Dev case NETDEV_UP: 1746a703e490SVasu Dev case NETDEV_CHANGE: 1747a703e490SVasu Dev break; 1748a703e490SVasu Dev case NETDEV_CHANGEMTU: 17497221d7e5SYi Zou if (netdev->features & NETIF_F_FCOE_MTU) 17507221d7e5SYi Zou break; 17511d1b88dcSVasu Dev mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + 1752a703e490SVasu Dev sizeof(struct fcoe_crc_eof)); 1753a703e490SVasu Dev if (mfs >= FC_MIN_MAX_FRAME) 17541875f27eSRobert Love fc_set_mfs(lport, mfs); 1755a703e490SVasu Dev break; 1756a703e490SVasu Dev case NETDEV_REGISTER: 1757a703e490SVasu Dev break; 17582e70e241SChris Leech case NETDEV_UNREGISTER: 17592e70e241SChris Leech list_del(&fcoe->list); 17602e70e241SChris Leech port = lport_priv(fcoe->ctlr.lp); 17612e70e241SChris Leech fcoe_interface_cleanup(fcoe); 17622e70e241SChris Leech schedule_work(&port->destroy_work); 17632e70e241SChris Leech goto out; 17642e70e241SChris Leech break; 1765a703e490SVasu Dev default: 17661d1b88dcSVasu Dev FCOE_NETDEV_DBG(netdev, "Unknown event %ld " 1767d5488eb9SRobert Love "from netdev netlink\n", event); 1768a703e490SVasu Dev } 17691875f27eSRobert Love if (link_possible && !fcoe_link_ok(lport)) 17703fe9a0baSChris Leech fcoe_ctlr_link_up(&fcoe->ctlr); 17713fe9a0baSChris Leech else if (fcoe_ctlr_link_down(&fcoe->ctlr)) { 17721875f27eSRobert Love stats = fc_lport_get_stats(lport); 1773a703e490SVasu Dev stats->LinkFailureCount++; 17741875f27eSRobert Love fcoe_clean_pending_queue(lport); 1775a703e490SVasu Dev } 1776a703e490SVasu Dev out: 1777a703e490SVasu Dev return rc; 1778a703e490SVasu Dev } 1779a703e490SVasu Dev 1780a703e490SVasu Dev /** 17811875f27eSRobert Love * fcoe_if_to_netdev() - Parse a name buffer to get a net device 17821875f27eSRobert Love * @buffer: The name of the net device 1783a703e490SVasu Dev * 17841875f27eSRobert Love * Returns: NULL or a ptr to net_device 1785a703e490SVasu Dev */ 1786a703e490SVasu Dev static struct net_device *fcoe_if_to_netdev(const char *buffer) 1787a703e490SVasu Dev { 1788a703e490SVasu Dev char *cp; 1789a703e490SVasu Dev char ifname[IFNAMSIZ + 2]; 1790a703e490SVasu Dev 1791a703e490SVasu Dev if (buffer) { 1792a703e490SVasu Dev strlcpy(ifname, buffer, IFNAMSIZ); 1793a703e490SVasu Dev cp = ifname + strlen(ifname); 1794a703e490SVasu Dev while (--cp >= ifname && *cp == '\n') 1795a703e490SVasu Dev *cp = '\0'; 1796a703e490SVasu Dev return dev_get_by_name(&init_net, ifname); 1797a703e490SVasu Dev } 1798a703e490SVasu Dev return NULL; 1799a703e490SVasu Dev } 1800a703e490SVasu Dev 1801a703e490SVasu Dev /** 18021875f27eSRobert Love * fcoe_destroy() - Destroy a FCoE interface 18031875f27eSRobert Love * @buffer: The name of the Ethernet interface to be destroyed 18041875f27eSRobert Love * @kp: The associated kernel parameter 18051875f27eSRobert Love * 18061875f27eSRobert Love * Called from sysfs. 1807a703e490SVasu Dev * 1808a703e490SVasu Dev * Returns: 0 for success 1809a703e490SVasu Dev */ 1810a703e490SVasu Dev static int fcoe_destroy(const char *buffer, struct kernel_param *kp) 1811a703e490SVasu Dev { 1812030f4e00SChris Leech struct fcoe_interface *fcoe; 18132e70e241SChris Leech struct net_device *netdev; 18148eca355fSMike Christie int rc = 0; 1815a703e490SVasu Dev 1816dfc1d0feSChris Leech mutex_lock(&fcoe_config_mutex); 1817dfc1d0feSChris Leech #ifdef CONFIG_FCOE_MODULE 1818dfc1d0feSChris Leech /* 1819dfc1d0feSChris Leech * Make sure the module has been initialized, and is not about to be 1820dfc1d0feSChris Leech * removed. Module paramter sysfs files are writable before the 1821dfc1d0feSChris Leech * module_init function is called and after module_exit. 1822dfc1d0feSChris Leech */ 1823dfc1d0feSChris Leech if (THIS_MODULE->state != MODULE_STATE_LIVE) { 1824dfc1d0feSChris Leech rc = -ENODEV; 1825dfc1d0feSChris Leech goto out_nodev; 1826dfc1d0feSChris Leech } 1827dfc1d0feSChris Leech #endif 1828dfc1d0feSChris Leech 1829a703e490SVasu Dev netdev = fcoe_if_to_netdev(buffer); 1830a703e490SVasu Dev if (!netdev) { 1831a703e490SVasu Dev rc = -ENODEV; 1832a703e490SVasu Dev goto out_nodev; 1833a703e490SVasu Dev } 18342e70e241SChris Leech 1835090eb6c4SChris Leech rtnl_lock(); 18362e70e241SChris Leech fcoe = fcoe_hostlist_lookup_port(netdev); 18372e70e241SChris Leech if (!fcoe) { 1838090eb6c4SChris Leech rtnl_unlock(); 1839a703e490SVasu Dev rc = -ENODEV; 1840a703e490SVasu Dev goto out_putdev; 1841a703e490SVasu Dev } 18422e70e241SChris Leech list_del(&fcoe->list); 18432e70e241SChris Leech fcoe_interface_cleanup(fcoe); 18442e70e241SChris Leech rtnl_unlock(); 18452e70e241SChris Leech fcoe_if_destroy(fcoe->ctlr.lp); 1846a703e490SVasu Dev out_putdev: 1847a703e490SVasu Dev dev_put(netdev); 1848a703e490SVasu Dev out_nodev: 1849dfc1d0feSChris Leech mutex_unlock(&fcoe_config_mutex); 1850a703e490SVasu Dev return rc; 1851a703e490SVasu Dev } 1852a703e490SVasu Dev 18531875f27eSRobert Love /** 18541875f27eSRobert Love * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context 18551875f27eSRobert Love * @work: Handle to the FCoE port to be destroyed 18561875f27eSRobert Love */ 18572e70e241SChris Leech static void fcoe_destroy_work(struct work_struct *work) 18582e70e241SChris Leech { 18592e70e241SChris Leech struct fcoe_port *port; 18602e70e241SChris Leech 18612e70e241SChris Leech port = container_of(work, struct fcoe_port, destroy_work); 18622e70e241SChris Leech mutex_lock(&fcoe_config_mutex); 18632e70e241SChris Leech fcoe_if_destroy(port->lport); 18642e70e241SChris Leech mutex_unlock(&fcoe_config_mutex); 18652e70e241SChris Leech } 18662e70e241SChris Leech 1867a703e490SVasu Dev /** 18681875f27eSRobert Love * fcoe_create() - Create a fcoe interface 18691875f27eSRobert Love * @buffer: The name of the Ethernet interface to create on 18701875f27eSRobert Love * @kp: The associated kernel param 18711875f27eSRobert Love * 18721875f27eSRobert Love * Called from sysfs. 1873a703e490SVasu Dev * 1874a703e490SVasu Dev * Returns: 0 for success 1875a703e490SVasu Dev */ 1876a703e490SVasu Dev static int fcoe_create(const char *buffer, struct kernel_param *kp) 1877a703e490SVasu Dev { 1878a703e490SVasu Dev int rc; 1879030f4e00SChris Leech struct fcoe_interface *fcoe; 1880af7f85d9SChris Leech struct fc_lport *lport; 1881a703e490SVasu Dev struct net_device *netdev; 1882a703e490SVasu Dev 1883dfc1d0feSChris Leech mutex_lock(&fcoe_config_mutex); 1884dfc1d0feSChris Leech #ifdef CONFIG_FCOE_MODULE 1885dfc1d0feSChris Leech /* 1886dfc1d0feSChris Leech * Make sure the module has been initialized, and is not about to be 1887dfc1d0feSChris Leech * removed. Module paramter sysfs files are writable before the 1888dfc1d0feSChris Leech * module_init function is called and after module_exit. 1889dfc1d0feSChris Leech */ 1890dfc1d0feSChris Leech if (THIS_MODULE->state != MODULE_STATE_LIVE) { 1891dfc1d0feSChris Leech rc = -ENODEV; 1892dfc1d0feSChris Leech goto out_nodev; 1893dfc1d0feSChris Leech } 1894dfc1d0feSChris Leech #endif 1895dfc1d0feSChris Leech 18962e70e241SChris Leech rtnl_lock(); 1897a703e490SVasu Dev netdev = fcoe_if_to_netdev(buffer); 1898a703e490SVasu Dev if (!netdev) { 1899a703e490SVasu Dev rc = -ENODEV; 1900a703e490SVasu Dev goto out_nodev; 1901a703e490SVasu Dev } 19022e70e241SChris Leech 1903a703e490SVasu Dev /* look for existing lport */ 1904a703e490SVasu Dev if (fcoe_hostlist_lookup(netdev)) { 1905a703e490SVasu Dev rc = -EEXIST; 1906a703e490SVasu Dev goto out_putdev; 1907a703e490SVasu Dev } 1908a703e490SVasu Dev 1909030f4e00SChris Leech fcoe = fcoe_interface_create(netdev); 1910030f4e00SChris Leech if (!fcoe) { 1911030f4e00SChris Leech rc = -ENOMEM; 1912030f4e00SChris Leech goto out_putdev; 1913030f4e00SChris Leech } 1914030f4e00SChris Leech 19159a05753bSChris Leech lport = fcoe_if_create(fcoe, &netdev->dev, 0); 1916af7f85d9SChris Leech if (IS_ERR(lport)) { 1917d5488eb9SRobert Love printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", 1918a703e490SVasu Dev netdev->name); 1919a703e490SVasu Dev rc = -EIO; 19202e70e241SChris Leech fcoe_interface_cleanup(fcoe); 1921030f4e00SChris Leech goto out_free; 1922a703e490SVasu Dev } 1923030f4e00SChris Leech 192454b649f8SChris Leech /* Make this the "master" N_Port */ 192554b649f8SChris Leech fcoe->ctlr.lp = lport; 1926030f4e00SChris Leech 1927c863df33SChris Leech /* add to lports list */ 1928c863df33SChris Leech fcoe_hostlist_add(lport); 1929c863df33SChris Leech 193054b649f8SChris Leech /* start FIP Discovery and FLOGI */ 193154b649f8SChris Leech lport->boot_time = jiffies; 193254b649f8SChris Leech fc_fabric_login(lport); 193354b649f8SChris Leech if (!fcoe_link_ok(lport)) 193454b649f8SChris Leech fcoe_ctlr_link_up(&fcoe->ctlr); 193554b649f8SChris Leech 193654b649f8SChris Leech rc = 0; 1937030f4e00SChris Leech out_free: 193854b649f8SChris Leech /* 193954b649f8SChris Leech * Release from init in fcoe_interface_create(), on success lport 194054b649f8SChris Leech * should be holding a reference taken in fcoe_if_create(). 194154b649f8SChris Leech */ 1942030f4e00SChris Leech fcoe_interface_put(fcoe); 1943a703e490SVasu Dev out_putdev: 1944a703e490SVasu Dev dev_put(netdev); 1945a703e490SVasu Dev out_nodev: 19462e70e241SChris Leech rtnl_unlock(); 1947dfc1d0feSChris Leech mutex_unlock(&fcoe_config_mutex); 1948a703e490SVasu Dev return rc; 1949a703e490SVasu Dev } 1950a703e490SVasu Dev 1951a703e490SVasu Dev /** 19521875f27eSRobert Love * fcoe_link_ok() - Check if the link is OK for a local port 19531875f27eSRobert Love * @lport: The local port to check link on 1954a703e490SVasu Dev * 1955a703e490SVasu Dev * Any permanently-disqualifying conditions have been previously checked. 1956a703e490SVasu Dev * This also updates the speed setting, which may change with link for 100/1000. 1957a703e490SVasu Dev * 1958a703e490SVasu Dev * This function should probably be checking for PAUSE support at some point 1959a703e490SVasu Dev * in the future. Currently Per-priority-pause is not determinable using 1960a703e490SVasu Dev * ethtool, so we shouldn't be restrictive until that problem is resolved. 1961a703e490SVasu Dev * 1962a703e490SVasu Dev * Returns: 0 if link is OK for use by FCoE. 1963a703e490SVasu Dev * 1964a703e490SVasu Dev */ 19651875f27eSRobert Love int fcoe_link_ok(struct fc_lport *lport) 1966a703e490SVasu Dev { 19671875f27eSRobert Love struct fcoe_port *port = lport_priv(lport); 19681875f27eSRobert Love struct net_device *netdev = port->fcoe->netdev; 1969a703e490SVasu Dev struct ethtool_cmd ecmd = { ETHTOOL_GSET }; 1970a703e490SVasu Dev 19711875f27eSRobert Love if ((netdev->flags & IFF_UP) && netif_carrier_ok(netdev) && 19721875f27eSRobert Love (!dev_ethtool_get_settings(netdev, &ecmd))) { 19731875f27eSRobert Love lport->link_supported_speeds &= 1974a703e490SVasu Dev ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT); 1975a703e490SVasu Dev if (ecmd.supported & (SUPPORTED_1000baseT_Half | 1976a703e490SVasu Dev SUPPORTED_1000baseT_Full)) 19771875f27eSRobert Love lport->link_supported_speeds |= FC_PORTSPEED_1GBIT; 1978a703e490SVasu Dev if (ecmd.supported & SUPPORTED_10000baseT_Full) 19791875f27eSRobert Love lport->link_supported_speeds |= 1980a703e490SVasu Dev FC_PORTSPEED_10GBIT; 1981a703e490SVasu Dev if (ecmd.speed == SPEED_1000) 19821875f27eSRobert Love lport->link_speed = FC_PORTSPEED_1GBIT; 1983a703e490SVasu Dev if (ecmd.speed == SPEED_10000) 19841875f27eSRobert Love lport->link_speed = FC_PORTSPEED_10GBIT; 1985a703e490SVasu Dev 19862f718d64SYi Zou return 0; 19872f718d64SYi Zou } 19882f718d64SYi Zou return -1; 1989a703e490SVasu Dev } 1990a703e490SVasu Dev 1991a703e490SVasu Dev /** 19921875f27eSRobert Love * fcoe_percpu_clean() - Clear all pending skbs for an local port 19931875f27eSRobert Love * @lport: The local port whose skbs are to be cleared 1994e7a51997SJoe Eykholt * 1995e7a51997SJoe Eykholt * Must be called with fcoe_create_mutex held to single-thread completion. 1996e7a51997SJoe Eykholt * 1997e7a51997SJoe Eykholt * This flushes the pending skbs by adding a new skb to each queue and 1998e7a51997SJoe Eykholt * waiting until they are all freed. This assures us that not only are 1999e7a51997SJoe Eykholt * there no packets that will be handled by the lport, but also that any 2000e7a51997SJoe Eykholt * threads already handling packet have returned. 2001a703e490SVasu Dev */ 20021875f27eSRobert Love void fcoe_percpu_clean(struct fc_lport *lport) 2003a703e490SVasu Dev { 2004a703e490SVasu Dev struct fcoe_percpu_s *pp; 2005a703e490SVasu Dev struct fcoe_rcv_info *fr; 2006a703e490SVasu Dev struct sk_buff_head *list; 2007a703e490SVasu Dev struct sk_buff *skb, *next; 2008a703e490SVasu Dev struct sk_buff *head; 2009a703e490SVasu Dev unsigned int cpu; 2010a703e490SVasu Dev 2011a703e490SVasu Dev for_each_possible_cpu(cpu) { 2012a703e490SVasu Dev pp = &per_cpu(fcoe_percpu, cpu); 2013a703e490SVasu Dev spin_lock_bh(&pp->fcoe_rx_list.lock); 2014a703e490SVasu Dev list = &pp->fcoe_rx_list; 2015a703e490SVasu Dev head = list->next; 2016a703e490SVasu Dev for (skb = head; skb != (struct sk_buff *)list; 2017a703e490SVasu Dev skb = next) { 2018a703e490SVasu Dev next = skb->next; 2019a703e490SVasu Dev fr = fcoe_dev_from_skb(skb); 20201875f27eSRobert Love if (fr->fr_dev == lport) { 2021a703e490SVasu Dev __skb_unlink(skb, list); 2022a703e490SVasu Dev kfree_skb(skb); 2023a703e490SVasu Dev } 2024a703e490SVasu Dev } 2025e7a51997SJoe Eykholt 2026e7a51997SJoe Eykholt if (!pp->thread || !cpu_online(cpu)) { 2027a703e490SVasu Dev spin_unlock_bh(&pp->fcoe_rx_list.lock); 2028e7a51997SJoe Eykholt continue; 2029e7a51997SJoe Eykholt } 2030e7a51997SJoe Eykholt 2031e7a51997SJoe Eykholt skb = dev_alloc_skb(0); 2032e7a51997SJoe Eykholt if (!skb) { 2033e7a51997SJoe Eykholt spin_unlock_bh(&pp->fcoe_rx_list.lock); 2034e7a51997SJoe Eykholt continue; 2035e7a51997SJoe Eykholt } 2036e7a51997SJoe Eykholt skb->destructor = fcoe_percpu_flush_done; 2037e7a51997SJoe Eykholt 2038e7a51997SJoe Eykholt __skb_queue_tail(&pp->fcoe_rx_list, skb); 2039e7a51997SJoe Eykholt if (pp->fcoe_rx_list.qlen == 1) 2040e7a51997SJoe Eykholt wake_up_process(pp->thread); 2041e7a51997SJoe Eykholt spin_unlock_bh(&pp->fcoe_rx_list.lock); 2042e7a51997SJoe Eykholt 2043e7a51997SJoe Eykholt wait_for_completion(&fcoe_flush_completion); 2044a703e490SVasu Dev } 2045a703e490SVasu Dev } 2046a703e490SVasu Dev 2047a703e490SVasu Dev /** 2048a703e490SVasu Dev * fcoe_clean_pending_queue() - Dequeue a skb and free it 20491875f27eSRobert Love * @lport: The local port to dequeue a skb on 2050a703e490SVasu Dev */ 20511875f27eSRobert Love void fcoe_clean_pending_queue(struct fc_lport *lport) 2052a703e490SVasu Dev { 20531875f27eSRobert Love struct fcoe_port *port = lport_priv(lport); 2054a703e490SVasu Dev struct sk_buff *skb; 2055a703e490SVasu Dev 2056014f5c3fSChris Leech spin_lock_bh(&port->fcoe_pending_queue.lock); 2057014f5c3fSChris Leech while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) { 2058014f5c3fSChris Leech spin_unlock_bh(&port->fcoe_pending_queue.lock); 2059a703e490SVasu Dev kfree_skb(skb); 2060014f5c3fSChris Leech spin_lock_bh(&port->fcoe_pending_queue.lock); 2061a703e490SVasu Dev } 2062014f5c3fSChris Leech spin_unlock_bh(&port->fcoe_pending_queue.lock); 2063a703e490SVasu Dev } 2064a703e490SVasu Dev 2065a703e490SVasu Dev /** 20661875f27eSRobert Love * fcoe_reset() - Reset a local port 20671875f27eSRobert Love * @shost: The SCSI host associated with the local port to be reset 2068a703e490SVasu Dev * 20691875f27eSRobert Love * Returns: Always 0 (return value required by FC transport template) 2070a703e490SVasu Dev */ 2071a703e490SVasu Dev int fcoe_reset(struct Scsi_Host *shost) 2072a703e490SVasu Dev { 2073a703e490SVasu Dev struct fc_lport *lport = shost_priv(shost); 2074a703e490SVasu Dev fc_lport_reset(lport); 2075a703e490SVasu Dev return 0; 2076a703e490SVasu Dev } 2077a703e490SVasu Dev 2078a703e490SVasu Dev /** 20791875f27eSRobert Love * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device 20801875f27eSRobert Love * @netdev: The net device used as a key 2081a703e490SVasu Dev * 20821875f27eSRobert Love * Locking: Must be called with the RNL mutex held. 20831875f27eSRobert Love * 20841875f27eSRobert Love * Returns: NULL or the FCoE interface 2085a703e490SVasu Dev */ 2086014f5c3fSChris Leech static struct fcoe_interface * 20871875f27eSRobert Love fcoe_hostlist_lookup_port(const struct net_device *netdev) 2088a703e490SVasu Dev { 2089014f5c3fSChris Leech struct fcoe_interface *fcoe; 2090a703e490SVasu Dev 2091014f5c3fSChris Leech list_for_each_entry(fcoe, &fcoe_hostlist, list) { 20921875f27eSRobert Love if (fcoe->netdev == netdev) 2093014f5c3fSChris Leech return fcoe; 2094a703e490SVasu Dev } 2095a703e490SVasu Dev return NULL; 2096a703e490SVasu Dev } 2097a703e490SVasu Dev 2098a703e490SVasu Dev /** 20991875f27eSRobert Love * fcoe_hostlist_lookup() - Find the local port associated with a 21001875f27eSRobert Love * given net device 21011875f27eSRobert Love * @netdev: The netdevice used as a key 2102a703e490SVasu Dev * 21031875f27eSRobert Love * Locking: Must be called with the RTNL mutex held 21041875f27eSRobert Love * 21051875f27eSRobert Love * Returns: NULL or the local port 2106a703e490SVasu Dev */ 2107090eb6c4SChris Leech static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) 2108a703e490SVasu Dev { 2109014f5c3fSChris Leech struct fcoe_interface *fcoe; 2110a703e490SVasu Dev 2111014f5c3fSChris Leech fcoe = fcoe_hostlist_lookup_port(netdev); 21123fe9a0baSChris Leech return (fcoe) ? fcoe->ctlr.lp : NULL; 2113a703e490SVasu Dev } 2114a703e490SVasu Dev 2115a703e490SVasu Dev /** 21161875f27eSRobert Love * fcoe_hostlist_add() - Add the FCoE interface identified by a local 21171875f27eSRobert Love * port to the hostlist 21181875f27eSRobert Love * @lport: The local port that identifies the FCoE interface to be added 21191875f27eSRobert Love * 21201875f27eSRobert Love * Locking: must be called with the RTNL mutex held 2121a703e490SVasu Dev * 2122a703e490SVasu Dev * Returns: 0 for success 2123a703e490SVasu Dev */ 2124090eb6c4SChris Leech static int fcoe_hostlist_add(const struct fc_lport *lport) 2125a703e490SVasu Dev { 2126014f5c3fSChris Leech struct fcoe_interface *fcoe; 2127014f5c3fSChris Leech struct fcoe_port *port; 2128a703e490SVasu Dev 2129014f5c3fSChris Leech fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); 2130014f5c3fSChris Leech if (!fcoe) { 2131014f5c3fSChris Leech port = lport_priv(lport); 2132014f5c3fSChris Leech fcoe = port->fcoe; 2133014f5c3fSChris Leech list_add_tail(&fcoe->list, &fcoe_hostlist); 2134a703e490SVasu Dev } 2135a703e490SVasu Dev return 0; 2136a703e490SVasu Dev } 2137a703e490SVasu Dev 2138a703e490SVasu Dev /** 21391875f27eSRobert Love * fcoe_init() - Initialize fcoe.ko 2140a703e490SVasu Dev * 21411875f27eSRobert Love * Returns: 0 on success, or a negative value on failure 2142a703e490SVasu Dev */ 2143a703e490SVasu Dev static int __init fcoe_init(void) 2144a703e490SVasu Dev { 21451875f27eSRobert Love struct fcoe_percpu_s *p; 2146a703e490SVasu Dev unsigned int cpu; 2147a703e490SVasu Dev int rc = 0; 2148a703e490SVasu Dev 2149dfc1d0feSChris Leech mutex_lock(&fcoe_config_mutex); 2150dfc1d0feSChris Leech 2151a703e490SVasu Dev for_each_possible_cpu(cpu) { 2152a703e490SVasu Dev p = &per_cpu(fcoe_percpu, cpu); 2153a703e490SVasu Dev skb_queue_head_init(&p->fcoe_rx_list); 2154a703e490SVasu Dev } 2155a703e490SVasu Dev 2156a703e490SVasu Dev for_each_online_cpu(cpu) 2157a703e490SVasu Dev fcoe_percpu_thread_create(cpu); 2158a703e490SVasu Dev 2159a703e490SVasu Dev /* Initialize per CPU interrupt thread */ 2160a703e490SVasu Dev rc = register_hotcpu_notifier(&fcoe_cpu_notifier); 2161a703e490SVasu Dev if (rc) 2162a703e490SVasu Dev goto out_free; 2163a703e490SVasu Dev 2164a703e490SVasu Dev /* Setup link change notification */ 2165a703e490SVasu Dev fcoe_dev_setup(); 2166a703e490SVasu Dev 21675892c32fSChris Leech rc = fcoe_if_init(); 21685892c32fSChris Leech if (rc) 21695892c32fSChris Leech goto out_free; 2170a703e490SVasu Dev 2171dfc1d0feSChris Leech mutex_unlock(&fcoe_config_mutex); 2172a703e490SVasu Dev return 0; 2173a703e490SVasu Dev 2174a703e490SVasu Dev out_free: 2175a703e490SVasu Dev for_each_online_cpu(cpu) { 2176a703e490SVasu Dev fcoe_percpu_thread_destroy(cpu); 2177a703e490SVasu Dev } 2178dfc1d0feSChris Leech mutex_unlock(&fcoe_config_mutex); 2179a703e490SVasu Dev return rc; 2180a703e490SVasu Dev } 2181a703e490SVasu Dev module_init(fcoe_init); 2182a703e490SVasu Dev 2183a703e490SVasu Dev /** 21841875f27eSRobert Love * fcoe_exit() - Clean up fcoe.ko 2185a703e490SVasu Dev * 21861875f27eSRobert Love * Returns: 0 on success or a negative value on failure 2187a703e490SVasu Dev */ 2188a703e490SVasu Dev static void __exit fcoe_exit(void) 2189a703e490SVasu Dev { 2190014f5c3fSChris Leech struct fcoe_interface *fcoe, *tmp; 21912e70e241SChris Leech struct fcoe_port *port; 21921875f27eSRobert Love unsigned int cpu; 2193a703e490SVasu Dev 2194dfc1d0feSChris Leech mutex_lock(&fcoe_config_mutex); 2195dfc1d0feSChris Leech 2196a703e490SVasu Dev fcoe_dev_cleanup(); 2197a703e490SVasu Dev 2198a703e490SVasu Dev /* releases the associated fcoe hosts */ 2199090eb6c4SChris Leech rtnl_lock(); 2200090eb6c4SChris Leech list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { 2201c863df33SChris Leech list_del(&fcoe->list); 22022e70e241SChris Leech port = lport_priv(fcoe->ctlr.lp); 22032e70e241SChris Leech fcoe_interface_cleanup(fcoe); 22042e70e241SChris Leech schedule_work(&port->destroy_work); 2205c863df33SChris Leech } 2206090eb6c4SChris Leech rtnl_unlock(); 2207a703e490SVasu Dev 2208a703e490SVasu Dev unregister_hotcpu_notifier(&fcoe_cpu_notifier); 2209a703e490SVasu Dev 2210014f5c3fSChris Leech for_each_online_cpu(cpu) 2211a703e490SVasu Dev fcoe_percpu_thread_destroy(cpu); 2212a703e490SVasu Dev 2213dfc1d0feSChris Leech mutex_unlock(&fcoe_config_mutex); 22142e70e241SChris Leech 22152e70e241SChris Leech /* flush any asyncronous interface destroys, 22162e70e241SChris Leech * this should happen after the netdev notifier is unregistered */ 22172e70e241SChris Leech flush_scheduled_work(); 22189a05753bSChris Leech /* That will flush out all the N_Ports on the hostlist, but now we 22199a05753bSChris Leech * may have NPIV VN_Ports scheduled for destruction */ 22209a05753bSChris Leech flush_scheduled_work(); 22212e70e241SChris Leech 22222e70e241SChris Leech /* detach from scsi transport 22232e70e241SChris Leech * must happen after all destroys are done, therefor after the flush */ 22242e70e241SChris Leech fcoe_if_exit(); 2225a703e490SVasu Dev } 2226a703e490SVasu Dev module_exit(fcoe_exit); 222711b56188SChris Leech 222811b56188SChris Leech /** 222911b56188SChris Leech * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler 223011b56188SChris Leech * @seq: active sequence in the FLOGI or FDISC exchange 223111b56188SChris Leech * @fp: response frame, or error encoded in a pointer (timeout) 223211b56188SChris Leech * @arg: pointer the the fcoe_ctlr structure 223311b56188SChris Leech * 223411b56188SChris Leech * This handles MAC address managment for FCoE, then passes control on to 223511b56188SChris Leech * the libfc FLOGI response handler. 223611b56188SChris Leech */ 223711b56188SChris Leech static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) 223811b56188SChris Leech { 223911b56188SChris Leech struct fcoe_ctlr *fip = arg; 224011b56188SChris Leech struct fc_exch *exch = fc_seq_exch(seq); 224111b56188SChris Leech struct fc_lport *lport = exch->lp; 224211b56188SChris Leech u8 *mac; 224311b56188SChris Leech 224411b56188SChris Leech if (IS_ERR(fp)) 224511b56188SChris Leech goto done; 224611b56188SChris Leech 224711b56188SChris Leech mac = fr_cb(fp)->granted_mac; 224811b56188SChris Leech if (is_zero_ether_addr(mac)) { 224911b56188SChris Leech /* pre-FIP */ 2250386309ceSJoe Eykholt if (fcoe_ctlr_recv_flogi(fip, lport, fp)) { 225111b56188SChris Leech fc_frame_free(fp); 225211b56188SChris Leech return; 225311b56188SChris Leech } 225411b56188SChris Leech } 2255386309ceSJoe Eykholt fcoe_update_src_mac(lport, mac); 225611b56188SChris Leech done: 225711b56188SChris Leech fc_lport_flogi_resp(seq, fp, lport); 225811b56188SChris Leech } 225911b56188SChris Leech 226011b56188SChris Leech /** 226111b56188SChris Leech * fcoe_logo_resp() - FCoE specific LOGO response handler 226211b56188SChris Leech * @seq: active sequence in the LOGO exchange 226311b56188SChris Leech * @fp: response frame, or error encoded in a pointer (timeout) 226411b56188SChris Leech * @arg: pointer the the fcoe_ctlr structure 226511b56188SChris Leech * 226611b56188SChris Leech * This handles MAC address managment for FCoE, then passes control on to 226711b56188SChris Leech * the libfc LOGO response handler. 226811b56188SChris Leech */ 226911b56188SChris Leech static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) 227011b56188SChris Leech { 2271386309ceSJoe Eykholt struct fc_lport *lport = arg; 227211b56188SChris Leech static u8 zero_mac[ETH_ALEN] = { 0 }; 227311b56188SChris Leech 227411b56188SChris Leech if (!IS_ERR(fp)) 2275386309ceSJoe Eykholt fcoe_update_src_mac(lport, zero_mac); 227611b56188SChris Leech fc_lport_logo_resp(seq, fp, lport); 227711b56188SChris Leech } 227811b56188SChris Leech 227911b56188SChris Leech /** 228011b56188SChris Leech * fcoe_elsct_send - FCoE specific ELS handler 228111b56188SChris Leech * 228211b56188SChris Leech * This does special case handling of FIP encapsualted ELS exchanges for FCoE, 228311b56188SChris Leech * using FCoE specific response handlers and passing the FIP controller as 228411b56188SChris Leech * the argument (the lport is still available from the exchange). 228511b56188SChris Leech * 228611b56188SChris Leech * Most of the work here is just handed off to the libfc routine. 228711b56188SChris Leech */ 22881875f27eSRobert Love static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, 22891875f27eSRobert Love struct fc_frame *fp, unsigned int op, 22901875f27eSRobert Love void (*resp)(struct fc_seq *, 22911875f27eSRobert Love struct fc_frame *, 22921875f27eSRobert Love void *), 229311b56188SChris Leech void *arg, u32 timeout) 229411b56188SChris Leech { 229511b56188SChris Leech struct fcoe_port *port = lport_priv(lport); 229611b56188SChris Leech struct fcoe_interface *fcoe = port->fcoe; 229711b56188SChris Leech struct fcoe_ctlr *fip = &fcoe->ctlr; 229811b56188SChris Leech struct fc_frame_header *fh = fc_frame_header_get(fp); 229911b56188SChris Leech 230011b56188SChris Leech switch (op) { 230111b56188SChris Leech case ELS_FLOGI: 230211b56188SChris Leech case ELS_FDISC: 230311b56188SChris Leech return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, 230411b56188SChris Leech fip, timeout); 230511b56188SChris Leech case ELS_LOGO: 230611b56188SChris Leech /* only hook onto fabric logouts, not port logouts */ 230711b56188SChris Leech if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) 230811b56188SChris Leech break; 230911b56188SChris Leech return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, 2310386309ceSJoe Eykholt lport, timeout); 231111b56188SChris Leech } 231211b56188SChris Leech return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); 231311b56188SChris Leech } 231411b56188SChris Leech 23159a05753bSChris Leech /** 23169a05753bSChris Leech * fcoe_vport_create() - create an fc_host/scsi_host for a vport 23179a05753bSChris Leech * @vport: fc_vport object to create a new fc_host for 23189a05753bSChris Leech * @disabled: start the new fc_host in a disabled state by default? 23199a05753bSChris Leech * 23209a05753bSChris Leech * Returns: 0 for success 23219a05753bSChris Leech */ 23229a05753bSChris Leech static int fcoe_vport_create(struct fc_vport *vport, bool disabled) 23239a05753bSChris Leech { 23249a05753bSChris Leech struct Scsi_Host *shost = vport_to_shost(vport); 23259a05753bSChris Leech struct fc_lport *n_port = shost_priv(shost); 23269a05753bSChris Leech struct fcoe_port *port = lport_priv(n_port); 23279a05753bSChris Leech struct fcoe_interface *fcoe = port->fcoe; 23289a05753bSChris Leech struct net_device *netdev = fcoe->netdev; 23299a05753bSChris Leech struct fc_lport *vn_port; 23309a05753bSChris Leech 23319a05753bSChris Leech mutex_lock(&fcoe_config_mutex); 23329a05753bSChris Leech vn_port = fcoe_if_create(fcoe, &vport->dev, 1); 23339a05753bSChris Leech mutex_unlock(&fcoe_config_mutex); 23349a05753bSChris Leech 23359a05753bSChris Leech if (IS_ERR(vn_port)) { 23369a05753bSChris Leech printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", 23379a05753bSChris Leech netdev->name); 23389a05753bSChris Leech return -EIO; 23399a05753bSChris Leech } 23409a05753bSChris Leech 23419a05753bSChris Leech if (disabled) { 23429a05753bSChris Leech fc_vport_set_state(vport, FC_VPORT_DISABLED); 23439a05753bSChris Leech } else { 23449a05753bSChris Leech vn_port->boot_time = jiffies; 23459a05753bSChris Leech fc_fabric_login(vn_port); 23469a05753bSChris Leech fc_vport_setlink(vn_port); 23479a05753bSChris Leech } 23489a05753bSChris Leech return 0; 23499a05753bSChris Leech } 23509a05753bSChris Leech 23519a05753bSChris Leech /** 23529a05753bSChris Leech * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport 23539a05753bSChris Leech * @vport: fc_vport object that is being destroyed 23549a05753bSChris Leech * 23559a05753bSChris Leech * Returns: 0 for success 23569a05753bSChris Leech */ 23579a05753bSChris Leech static int fcoe_vport_destroy(struct fc_vport *vport) 23589a05753bSChris Leech { 23599a05753bSChris Leech struct Scsi_Host *shost = vport_to_shost(vport); 23609a05753bSChris Leech struct fc_lport *n_port = shost_priv(shost); 23619a05753bSChris Leech struct fc_lport *vn_port = vport->dd_data; 23629a05753bSChris Leech struct fcoe_port *port = lport_priv(vn_port); 23639a05753bSChris Leech 23649a05753bSChris Leech mutex_lock(&n_port->lp_mutex); 23659a05753bSChris Leech list_del(&vn_port->list); 23669a05753bSChris Leech mutex_unlock(&n_port->lp_mutex); 23679a05753bSChris Leech schedule_work(&port->destroy_work); 23689a05753bSChris Leech return 0; 23699a05753bSChris Leech } 23709a05753bSChris Leech 23719a05753bSChris Leech /** 23729a05753bSChris Leech * fcoe_vport_disable() - change vport state 23739a05753bSChris Leech * @vport: vport to bring online/offline 23749a05753bSChris Leech * @disable: should the vport be disabled? 23759a05753bSChris Leech */ 23769a05753bSChris Leech static int fcoe_vport_disable(struct fc_vport *vport, bool disable) 23779a05753bSChris Leech { 23789a05753bSChris Leech struct fc_lport *lport = vport->dd_data; 23799a05753bSChris Leech 23809a05753bSChris Leech if (disable) { 23819a05753bSChris Leech fc_vport_set_state(vport, FC_VPORT_DISABLED); 23829a05753bSChris Leech fc_fabric_logoff(lport); 23839a05753bSChris Leech } else { 23849a05753bSChris Leech lport->boot_time = jiffies; 23859a05753bSChris Leech fc_fabric_login(lport); 23869a05753bSChris Leech fc_vport_setlink(lport); 23879a05753bSChris Leech } 23889a05753bSChris Leech 23899a05753bSChris Leech return 0; 23909a05753bSChris Leech } 23919a05753bSChris Leech 2392dc8596d3SChris Leech /** 2393dc8596d3SChris Leech * fcoe_vport_set_symbolic_name() - append vport string to symbolic name 2394dc8596d3SChris Leech * @vport: fc_vport with a new symbolic name string 2395dc8596d3SChris Leech * 2396dc8596d3SChris Leech * After generating a new symbolic name string, a new RSPN_ID request is 2397dc8596d3SChris Leech * sent to the name server. There is no response handler, so if it fails 2398dc8596d3SChris Leech * for some reason it will not be retried. 2399dc8596d3SChris Leech */ 2400dc8596d3SChris Leech static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) 2401dc8596d3SChris Leech { 2402dc8596d3SChris Leech struct fc_lport *lport = vport->dd_data; 2403dc8596d3SChris Leech struct fc_frame *fp; 2404dc8596d3SChris Leech size_t len; 2405dc8596d3SChris Leech 2406dc8596d3SChris Leech snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, 2407dc8596d3SChris Leech "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, 2408dc8596d3SChris Leech fcoe_netdev(lport)->name, vport->symbolic_name); 2409dc8596d3SChris Leech 2410dc8596d3SChris Leech if (lport->state != LPORT_ST_READY) 2411dc8596d3SChris Leech return; 2412dc8596d3SChris Leech 2413dc8596d3SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 2414dc8596d3SChris Leech fp = fc_frame_alloc(lport, 2415dc8596d3SChris Leech sizeof(struct fc_ct_hdr) + 2416dc8596d3SChris Leech sizeof(struct fc_ns_rspn) + len); 2417dc8596d3SChris Leech if (!fp) 2418dc8596d3SChris Leech return; 2419dc8596d3SChris Leech lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, 2420dc8596d3SChris Leech NULL, NULL, lport->e_d_tov); 2421dc8596d3SChris Leech } 2422