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/spinlock.h> 22a703e490SVasu Dev #include <linux/netdevice.h> 23a703e490SVasu Dev #include <linux/etherdevice.h> 24a703e490SVasu Dev #include <linux/ethtool.h> 25a703e490SVasu Dev #include <linux/if_ether.h> 26a703e490SVasu Dev #include <linux/if_vlan.h> 27a703e490SVasu Dev #include <linux/crc32.h> 285a0e3ad6STejun Heo #include <linux/slab.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> 332ca32b48STejun Heo #include <linux/workqueue.h> 346f6c2aa3Sjohn fastabend #include <net/dcbnl.h> 356f6c2aa3Sjohn fastabend #include <net/dcbevent.h> 36a703e490SVasu Dev #include <scsi/scsi_tcq.h> 37a703e490SVasu Dev #include <scsi/scsicam.h> 38a703e490SVasu Dev #include <scsi/scsi_transport.h> 39a703e490SVasu Dev #include <scsi/scsi_transport_fc.h> 40a703e490SVasu Dev #include <net/rtnetlink.h> 41a703e490SVasu Dev 42a703e490SVasu Dev #include <scsi/fc/fc_encaps.h> 4397c8389dSJoe Eykholt #include <scsi/fc/fc_fip.h> 44a703e490SVasu Dev 45a703e490SVasu Dev #include <scsi/libfc.h> 46a703e490SVasu Dev #include <scsi/fc_frame.h> 47a703e490SVasu Dev #include <scsi/libfcoe.h> 48a703e490SVasu Dev 49fdd78027SVasu Dev #include "fcoe.h" 50fdd78027SVasu Dev 51a703e490SVasu Dev MODULE_AUTHOR("Open-FCoE.org"); 52a703e490SVasu Dev MODULE_DESCRIPTION("FCoE"); 539b34ecffSVasu Dev MODULE_LICENSE("GPL v2"); 54a703e490SVasu Dev 5505cc7390SYi Zou /* Performance tuning parameters for fcoe */ 56860eca2bSVasu Dev static unsigned int fcoe_ddp_min = 4096; 5705cc7390SYi Zou module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); 5805cc7390SYi Zou MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ 5905cc7390SYi Zou "Direct Data Placement (DDP)."); 6005cc7390SYi Zou 617c9c6841SBart Van Assche unsigned int fcoe_debug_logging; 627c9c6841SBart Van Assche module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR); 637c9c6841SBart Van Assche MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); 647c9c6841SBart Van Assche 657c9c6841SBart Van Assche static DEFINE_MUTEX(fcoe_config_mutex); 66dfc1d0feSChris Leech 672ca32b48STejun Heo static struct workqueue_struct *fcoe_wq; 682ca32b48STejun Heo 69e7a51997SJoe Eykholt /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */ 70e7a51997SJoe Eykholt static DECLARE_COMPLETION(fcoe_flush_completion); 71e7a51997SJoe Eykholt 72a703e490SVasu Dev /* fcoe host list */ 73090eb6c4SChris Leech /* must only by accessed under the RTNL mutex */ 747c9c6841SBart Van Assche static LIST_HEAD(fcoe_hostlist); 757c9c6841SBart Van Assche static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); 76a703e490SVasu Dev 77dd3fd72eSChris Leech /* Function Prototypes */ 781875f27eSRobert Love static int fcoe_reset(struct Scsi_Host *); 79fdd78027SVasu Dev static int fcoe_xmit(struct fc_lport *, struct fc_frame *); 80fdd78027SVasu Dev static int fcoe_rcv(struct sk_buff *, struct net_device *, 81fdd78027SVasu Dev struct packet_type *, struct net_device *); 821875f27eSRobert Love static int fcoe_percpu_receive_thread(void *); 831875f27eSRobert Love static void fcoe_percpu_clean(struct fc_lport *); 845e4f8fe7SRobert Love static int fcoe_link_speed_update(struct fc_lport *); 851875f27eSRobert Love static int fcoe_link_ok(struct fc_lport *); 86fdd78027SVasu Dev 87fdd78027SVasu Dev static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); 88fdd78027SVasu Dev static int fcoe_hostlist_add(const struct fc_lport *); 89fdd78027SVasu Dev 90a703e490SVasu Dev static int fcoe_device_notification(struct notifier_block *, ulong, void *); 91a703e490SVasu Dev static void fcoe_dev_setup(void); 92a703e490SVasu Dev static void fcoe_dev_cleanup(void); 931875f27eSRobert Love static struct fcoe_interface 941875f27eSRobert Love *fcoe_hostlist_lookup_port(const struct net_device *); 95a703e490SVasu Dev 961875f27eSRobert Love static int fcoe_fip_recv(struct sk_buff *, struct net_device *, 971875f27eSRobert Love struct packet_type *, struct net_device *); 981875f27eSRobert Love 991875f27eSRobert Love static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); 1001875f27eSRobert Love static void fcoe_update_src_mac(struct fc_lport *, u8 *); 1011875f27eSRobert Love static u8 *fcoe_get_src_mac(struct fc_lport *); 1021875f27eSRobert Love static void fcoe_destroy_work(struct work_struct *); 1031875f27eSRobert Love 1041875f27eSRobert Love static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, 1051875f27eSRobert Love unsigned int); 1061875f27eSRobert Love static int fcoe_ddp_done(struct fc_lport *, u16); 10771f89491SYi Zou static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *, 10871f89491SYi Zou unsigned int); 1091875f27eSRobert Love static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *); 1106f6c2aa3Sjohn fastabend static int fcoe_dcb_app_notification(struct notifier_block *notifier, 1116f6c2aa3Sjohn fastabend ulong event, void *ptr); 1121875f27eSRobert Love 11378a58246SYi Zou static bool fcoe_match(struct net_device *netdev); 11478a58246SYi Zou static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode); 11578a58246SYi Zou static int fcoe_destroy(struct net_device *netdev); 11678a58246SYi Zou static int fcoe_enable(struct net_device *netdev); 11778a58246SYi Zou static int fcoe_disable(struct net_device *netdev); 1181875f27eSRobert Love 1191875f27eSRobert Love static struct fc_seq *fcoe_elsct_send(struct fc_lport *, 1201875f27eSRobert Love u32 did, struct fc_frame *, 1211875f27eSRobert Love unsigned int op, 1221875f27eSRobert Love void (*resp)(struct fc_seq *, 1231875f27eSRobert Love struct fc_frame *, 1241875f27eSRobert Love void *), 1251875f27eSRobert Love void *, u32 timeout); 126859b7b64SChris Leech static void fcoe_recv_frame(struct sk_buff *skb); 1271875f27eSRobert Love 128b84056bfSYi Zou static void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *); 129b84056bfSYi Zou 1301875f27eSRobert Love /* notification function for packets from net device */ 131a703e490SVasu Dev static struct notifier_block fcoe_notifier = { 132a703e490SVasu Dev .notifier_call = fcoe_device_notification, 133a703e490SVasu Dev }; 134a703e490SVasu Dev 1351875f27eSRobert Love /* notification function for CPU hotplug events */ 1361875f27eSRobert Love static struct notifier_block fcoe_cpu_notifier = { 1371875f27eSRobert Love .notifier_call = fcoe_cpu_callback, 1381875f27eSRobert Love }; 1391875f27eSRobert Love 1406f6c2aa3Sjohn fastabend /* notification function for DCB events */ 1416f6c2aa3Sjohn fastabend static struct notifier_block dcb_notifier = { 1426f6c2aa3Sjohn fastabend .notifier_call = fcoe_dcb_app_notification, 1436f6c2aa3Sjohn fastabend }; 1446f6c2aa3Sjohn fastabend 1458ca86f84SYi Zou static struct scsi_transport_template *fcoe_nport_scsi_transport; 1468ca86f84SYi Zou static struct scsi_transport_template *fcoe_vport_scsi_transport; 147a703e490SVasu Dev 1481875f27eSRobert Love static int fcoe_vport_destroy(struct fc_vport *); 1491875f27eSRobert Love static int fcoe_vport_create(struct fc_vport *, bool disabled); 1501875f27eSRobert Love static int fcoe_vport_disable(struct fc_vport *, bool disable); 1511875f27eSRobert Love static void fcoe_set_vport_symbolic_name(struct fc_vport *); 1527d65b0dfSJoe Eykholt static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *); 1531875f27eSRobert Love 1541875f27eSRobert Love static struct libfc_function_template fcoe_libfc_fcn_templ = { 1551875f27eSRobert Love .frame_send = fcoe_xmit, 1561875f27eSRobert Love .ddp_setup = fcoe_ddp_setup, 1571875f27eSRobert Love .ddp_done = fcoe_ddp_done, 15871f89491SYi Zou .ddp_target = fcoe_ddp_target, 1591875f27eSRobert Love .elsct_send = fcoe_elsct_send, 160b84056bfSYi Zou .get_lesb = fcoe_get_lesb, 1617d65b0dfSJoe Eykholt .lport_set_port_id = fcoe_set_port_id, 1621875f27eSRobert Love }; 1639a05753bSChris Leech 1647c9c6841SBart Van Assche static struct fc_function_template fcoe_nport_fc_functions = { 165a703e490SVasu Dev .show_host_node_name = 1, 166a703e490SVasu Dev .show_host_port_name = 1, 167a703e490SVasu Dev .show_host_supported_classes = 1, 168a703e490SVasu Dev .show_host_supported_fc4s = 1, 169a703e490SVasu Dev .show_host_active_fc4s = 1, 170a703e490SVasu Dev .show_host_maxframe_size = 1, 1719f71af2fSNeerav Parikh .show_host_serial_number = 1, 1729f71af2fSNeerav Parikh .show_host_manufacturer = 1, 1739f71af2fSNeerav Parikh .show_host_model = 1, 1749f71af2fSNeerav Parikh .show_host_model_description = 1, 1759f71af2fSNeerav Parikh .show_host_hardware_version = 1, 1769f71af2fSNeerav Parikh .show_host_driver_version = 1, 1779f71af2fSNeerav Parikh .show_host_firmware_version = 1, 1789f71af2fSNeerav Parikh .show_host_optionrom_version = 1, 179a703e490SVasu Dev 180a703e490SVasu Dev .show_host_port_id = 1, 181a703e490SVasu Dev .show_host_supported_speeds = 1, 182a703e490SVasu Dev .get_host_speed = fc_get_host_speed, 183a703e490SVasu Dev .show_host_speed = 1, 184a703e490SVasu Dev .show_host_port_type = 1, 185a703e490SVasu Dev .get_host_port_state = fc_get_host_port_state, 186a703e490SVasu Dev .show_host_port_state = 1, 187a703e490SVasu Dev .show_host_symbolic_name = 1, 188a703e490SVasu Dev 189a703e490SVasu Dev .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 190a703e490SVasu Dev .show_rport_maxframe_size = 1, 191a703e490SVasu Dev .show_rport_supported_classes = 1, 192a703e490SVasu Dev 193a703e490SVasu Dev .show_host_fabric_name = 1, 194a703e490SVasu Dev .show_starget_node_name = 1, 195a703e490SVasu Dev .show_starget_port_name = 1, 196a703e490SVasu Dev .show_starget_port_id = 1, 197a703e490SVasu Dev .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, 198a703e490SVasu Dev .show_rport_dev_loss_tmo = 1, 199a703e490SVasu Dev .get_fc_host_stats = fc_get_host_stats, 200a703e490SVasu Dev .issue_fc_host_lip = fcoe_reset, 201a703e490SVasu Dev 202a703e490SVasu Dev .terminate_rport_io = fc_rport_terminate_io, 2039a05753bSChris Leech 2049a05753bSChris Leech .vport_create = fcoe_vport_create, 2059a05753bSChris Leech .vport_delete = fcoe_vport_destroy, 2069a05753bSChris Leech .vport_disable = fcoe_vport_disable, 207dc8596d3SChris Leech .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, 208a51ab396SSteve Ma 209a51ab396SSteve Ma .bsg_request = fc_lport_bsg_request, 210a703e490SVasu Dev }; 211a703e490SVasu Dev 2127c9c6841SBart Van Assche static struct fc_function_template fcoe_vport_fc_functions = { 213e9084bb8SChris Leech .show_host_node_name = 1, 214e9084bb8SChris Leech .show_host_port_name = 1, 215e9084bb8SChris Leech .show_host_supported_classes = 1, 216e9084bb8SChris Leech .show_host_supported_fc4s = 1, 217e9084bb8SChris Leech .show_host_active_fc4s = 1, 218e9084bb8SChris Leech .show_host_maxframe_size = 1, 2197e5adcfbSNeerav Parikh .show_host_serial_number = 1, 2207e5adcfbSNeerav Parikh .show_host_manufacturer = 1, 2217e5adcfbSNeerav Parikh .show_host_model = 1, 2227e5adcfbSNeerav Parikh .show_host_model_description = 1, 2237e5adcfbSNeerav Parikh .show_host_hardware_version = 1, 2247e5adcfbSNeerav Parikh .show_host_driver_version = 1, 2257e5adcfbSNeerav Parikh .show_host_firmware_version = 1, 2267e5adcfbSNeerav Parikh .show_host_optionrom_version = 1, 227e9084bb8SChris Leech 228e9084bb8SChris Leech .show_host_port_id = 1, 229e9084bb8SChris Leech .show_host_supported_speeds = 1, 230e9084bb8SChris Leech .get_host_speed = fc_get_host_speed, 231e9084bb8SChris Leech .show_host_speed = 1, 232e9084bb8SChris Leech .show_host_port_type = 1, 233e9084bb8SChris Leech .get_host_port_state = fc_get_host_port_state, 234e9084bb8SChris Leech .show_host_port_state = 1, 235e9084bb8SChris Leech .show_host_symbolic_name = 1, 236e9084bb8SChris Leech 237e9084bb8SChris Leech .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 238e9084bb8SChris Leech .show_rport_maxframe_size = 1, 239e9084bb8SChris Leech .show_rport_supported_classes = 1, 240e9084bb8SChris Leech 241e9084bb8SChris Leech .show_host_fabric_name = 1, 242e9084bb8SChris Leech .show_starget_node_name = 1, 243e9084bb8SChris Leech .show_starget_port_name = 1, 244e9084bb8SChris Leech .show_starget_port_id = 1, 245e9084bb8SChris Leech .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, 246e9084bb8SChris Leech .show_rport_dev_loss_tmo = 1, 247e9084bb8SChris Leech .get_fc_host_stats = fc_get_host_stats, 248e9084bb8SChris Leech .issue_fc_host_lip = fcoe_reset, 249e9084bb8SChris Leech 250e9084bb8SChris Leech .terminate_rport_io = fc_rport_terminate_io, 251a51ab396SSteve Ma 252a51ab396SSteve Ma .bsg_request = fc_lport_bsg_request, 253e9084bb8SChris Leech }; 254e9084bb8SChris Leech 255a703e490SVasu Dev static struct scsi_host_template fcoe_shost_template = { 256a703e490SVasu Dev .module = THIS_MODULE, 257a703e490SVasu Dev .name = "FCoE Driver", 258a703e490SVasu Dev .proc_name = FCOE_NAME, 259a703e490SVasu Dev .queuecommand = fc_queuecommand, 260a703e490SVasu Dev .eh_abort_handler = fc_eh_abort, 261a703e490SVasu Dev .eh_device_reset_handler = fc_eh_device_reset, 262a703e490SVasu Dev .eh_host_reset_handler = fc_eh_host_reset, 263a703e490SVasu Dev .slave_alloc = fc_slave_alloc, 264a703e490SVasu Dev .change_queue_depth = fc_change_queue_depth, 265a703e490SVasu Dev .change_queue_type = fc_change_queue_type, 266a703e490SVasu Dev .this_id = -1, 26714caf44cSVasu Dev .cmd_per_lun = 3, 268a703e490SVasu Dev .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, 269a703e490SVasu Dev .use_clustering = ENABLE_CLUSTERING, 270a703e490SVasu Dev .sg_tablesize = SG_ALL, 271a703e490SVasu Dev .max_sectors = 0xffff, 272a703e490SVasu Dev }; 273a703e490SVasu Dev 27454b649f8SChris Leech /** 2751875f27eSRobert Love * fcoe_interface_setup() - Setup a FCoE interface 2761875f27eSRobert Love * @fcoe: The new FCoE interface 2771875f27eSRobert Love * @netdev: The net device that the fcoe interface is on 27854b649f8SChris Leech * 27954b649f8SChris Leech * Returns : 0 for success 2802e70e241SChris Leech * Locking: must be called with the RTNL mutex held 28154b649f8SChris Leech */ 28254b649f8SChris Leech static int fcoe_interface_setup(struct fcoe_interface *fcoe, 28354b649f8SChris Leech struct net_device *netdev) 28454b649f8SChris Leech { 28554b649f8SChris Leech struct fcoe_ctlr *fip = &fcoe->ctlr; 28654b649f8SChris Leech struct netdev_hw_addr *ha; 2875bab87e6SYi Zou struct net_device *real_dev; 28854b649f8SChris Leech u8 flogi_maddr[ETH_ALEN]; 289b7a727f1SYi Zou const struct net_device_ops *ops; 29054b649f8SChris Leech 29154b649f8SChris Leech fcoe->netdev = netdev; 29254b649f8SChris Leech 293b7a727f1SYi Zou /* Let LLD initialize for FCoE */ 294b7a727f1SYi Zou ops = netdev->netdev_ops; 295b7a727f1SYi Zou if (ops->ndo_fcoe_enable) { 296b7a727f1SYi Zou if (ops->ndo_fcoe_enable(netdev)) 297b7a727f1SYi Zou FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" 298b7a727f1SYi Zou " specific feature for LLD.\n"); 299b7a727f1SYi Zou } 300b7a727f1SYi Zou 30154b649f8SChris Leech /* Do not support for bonding device */ 302cc8bdf06SJiri Pirko if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) { 30359d92516Sjohn fastabend FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); 30454b649f8SChris Leech return -EOPNOTSUPP; 30554b649f8SChris Leech } 30654b649f8SChris Leech 30754b649f8SChris Leech /* look for SAN MAC address, if multiple SAN MACs exist, only 30854b649f8SChris Leech * use the first one for SPMA */ 3095bab87e6SYi Zou real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ? 3105bab87e6SYi Zou vlan_dev_real_dev(netdev) : netdev; 311d1483bb9SVasu Dev fcoe->realdev = real_dev; 31254b649f8SChris Leech rcu_read_lock(); 3135bab87e6SYi Zou for_each_dev_addr(real_dev, ha) { 31454b649f8SChris Leech if ((ha->type == NETDEV_HW_ADDR_T_SAN) && 315bf361707SYi Zou (is_valid_ether_addr(ha->addr))) { 31654b649f8SChris Leech memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); 31754b649f8SChris Leech fip->spma = 1; 31854b649f8SChris Leech break; 31954b649f8SChris Leech } 32054b649f8SChris Leech } 32154b649f8SChris Leech rcu_read_unlock(); 32254b649f8SChris Leech 32354b649f8SChris Leech /* setup Source Mac Address */ 32454b649f8SChris Leech if (!fip->spma) 32554b649f8SChris Leech memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); 32654b649f8SChris Leech 32754b649f8SChris Leech /* 32854b649f8SChris Leech * Add FCoE MAC address as second unicast MAC address 32954b649f8SChris Leech * or enter promiscuous mode if not capable of listening 33054b649f8SChris Leech * for multiple unicast MACs. 33154b649f8SChris Leech */ 33254b649f8SChris Leech memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); 333a748ee24SJiri Pirko dev_uc_add(netdev, flogi_maddr); 33454b649f8SChris Leech if (fip->spma) 335a748ee24SJiri Pirko dev_uc_add(netdev, fip->ctl_src_addr); 336e10f8c66SJoe Eykholt if (fip->mode == FIP_MODE_VN2VN) { 337e10f8c66SJoe Eykholt dev_mc_add(netdev, FIP_ALL_VN2VN_MACS); 338e10f8c66SJoe Eykholt dev_mc_add(netdev, FIP_ALL_P2P_MACS); 339e10f8c66SJoe Eykholt } else 34022bedad3SJiri Pirko dev_mc_add(netdev, FIP_ALL_ENODE_MACS); 34154b649f8SChris Leech 34254b649f8SChris Leech /* 34354b649f8SChris Leech * setup the receive function from ethernet driver 34454b649f8SChris Leech * on the ethertype for the given device 34554b649f8SChris Leech */ 34654b649f8SChris Leech fcoe->fcoe_packet_type.func = fcoe_rcv; 34754b649f8SChris Leech fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE); 34854b649f8SChris Leech fcoe->fcoe_packet_type.dev = netdev; 34954b649f8SChris Leech dev_add_pack(&fcoe->fcoe_packet_type); 35054b649f8SChris Leech 35154b649f8SChris Leech fcoe->fip_packet_type.func = fcoe_fip_recv; 35254b649f8SChris Leech fcoe->fip_packet_type.type = htons(ETH_P_FIP); 35354b649f8SChris Leech fcoe->fip_packet_type.dev = netdev; 35454b649f8SChris Leech dev_add_pack(&fcoe->fip_packet_type); 35554b649f8SChris Leech 35654b649f8SChris Leech return 0; 35754b649f8SChris Leech } 35854b649f8SChris Leech 359a703e490SVasu Dev /** 3601875f27eSRobert Love * fcoe_interface_create() - Create a FCoE interface on a net device 3611875f27eSRobert Love * @netdev: The net device to create the FCoE interface on 3621dd454d9SJoe Eykholt * @fip_mode: The mode to use for FIP 363030f4e00SChris Leech * 364030f4e00SChris Leech * Returns: pointer to a struct fcoe_interface or NULL on error 365030f4e00SChris Leech */ 3661dd454d9SJoe Eykholt static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev, 3671dd454d9SJoe Eykholt enum fip_state fip_mode) 368030f4e00SChris Leech { 369030f4e00SChris Leech struct fcoe_interface *fcoe; 37059d92516Sjohn fastabend int err; 371030f4e00SChris Leech 3727287fb91SRobert Love if (!try_module_get(THIS_MODULE)) { 3737287fb91SRobert Love FCOE_NETDEV_DBG(netdev, 3747287fb91SRobert Love "Could not get a reference to the module\n"); 3757287fb91SRobert Love fcoe = ERR_PTR(-EBUSY); 3767287fb91SRobert Love goto out; 3777287fb91SRobert Love } 3787287fb91SRobert Love 379030f4e00SChris Leech fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL); 380030f4e00SChris Leech if (!fcoe) { 381030f4e00SChris Leech FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n"); 3827287fb91SRobert Love fcoe = ERR_PTR(-ENOMEM); 3836f68794cSRobert Love goto out_putmod; 384030f4e00SChris Leech } 385030f4e00SChris Leech 3862e70e241SChris Leech dev_hold(netdev); 387030f4e00SChris Leech kref_init(&fcoe->kref); 38854b649f8SChris Leech 38954b649f8SChris Leech /* 39054b649f8SChris Leech * Initialize FIP. 39154b649f8SChris Leech */ 3921dd454d9SJoe Eykholt fcoe_ctlr_init(&fcoe->ctlr, fip_mode); 39354b649f8SChris Leech fcoe->ctlr.send = fcoe_fip_send; 39454b649f8SChris Leech fcoe->ctlr.update_mac = fcoe_update_src_mac; 39511b56188SChris Leech fcoe->ctlr.get_src_addr = fcoe_get_src_mac; 39654b649f8SChris Leech 39759d92516Sjohn fastabend err = fcoe_interface_setup(fcoe, netdev); 39859d92516Sjohn fastabend if (err) { 39959d92516Sjohn fastabend fcoe_ctlr_destroy(&fcoe->ctlr); 40059d92516Sjohn fastabend kfree(fcoe); 40159d92516Sjohn fastabend dev_put(netdev); 4027287fb91SRobert Love fcoe = ERR_PTR(err); 4036f68794cSRobert Love goto out_putmod; 40459d92516Sjohn fastabend } 405030f4e00SChris Leech 4067287fb91SRobert Love goto out; 4077287fb91SRobert Love 4086f68794cSRobert Love out_putmod: 4097287fb91SRobert Love module_put(THIS_MODULE); 4107287fb91SRobert Love out: 411030f4e00SChris Leech return fcoe; 412030f4e00SChris Leech } 413030f4e00SChris Leech 414030f4e00SChris Leech /** 415030f4e00SChris Leech * fcoe_interface_release() - fcoe_port kref release function 4161875f27eSRobert Love * @kref: Embedded reference count in an fcoe_interface struct 417030f4e00SChris Leech */ 418030f4e00SChris Leech static void fcoe_interface_release(struct kref *kref) 419030f4e00SChris Leech { 420030f4e00SChris Leech struct fcoe_interface *fcoe; 4212e70e241SChris Leech struct net_device *netdev; 422030f4e00SChris Leech 423030f4e00SChris Leech fcoe = container_of(kref, struct fcoe_interface, kref); 4242e70e241SChris Leech netdev = fcoe->netdev; 4252e70e241SChris Leech /* tear-down the FCoE controller */ 4262e70e241SChris Leech fcoe_ctlr_destroy(&fcoe->ctlr); 427030f4e00SChris Leech kfree(fcoe); 4282e70e241SChris Leech dev_put(netdev); 4297287fb91SRobert Love module_put(THIS_MODULE); 430030f4e00SChris Leech } 431030f4e00SChris Leech 432030f4e00SChris Leech /** 4331875f27eSRobert Love * fcoe_interface_get() - Get a reference to a FCoE interface 4341875f27eSRobert Love * @fcoe: The FCoE interface to be held 435030f4e00SChris Leech */ 436030f4e00SChris Leech static inline void fcoe_interface_get(struct fcoe_interface *fcoe) 437030f4e00SChris Leech { 438030f4e00SChris Leech kref_get(&fcoe->kref); 439030f4e00SChris Leech } 440030f4e00SChris Leech 441030f4e00SChris Leech /** 4421875f27eSRobert Love * fcoe_interface_put() - Put a reference to a FCoE interface 4431875f27eSRobert Love * @fcoe: The FCoE interface to be released 444030f4e00SChris Leech */ 445030f4e00SChris Leech static inline void fcoe_interface_put(struct fcoe_interface *fcoe) 446030f4e00SChris Leech { 447030f4e00SChris Leech kref_put(&fcoe->kref, fcoe_interface_release); 448030f4e00SChris Leech } 449030f4e00SChris Leech 450030f4e00SChris Leech /** 451f04ca1b6SVasu Dev * fcoe_interface_cleanup() - Clean up a FCoE interface 452f04ca1b6SVasu Dev * @fcoe: The FCoE interface to be cleaned up 453f04ca1b6SVasu Dev * 454f04ca1b6SVasu Dev * Caller must be holding the RTNL mutex 455f04ca1b6SVasu Dev */ 4567c9c6841SBart Van Assche static void fcoe_interface_cleanup(struct fcoe_interface *fcoe) 457f04ca1b6SVasu Dev { 458f04ca1b6SVasu Dev struct net_device *netdev = fcoe->netdev; 459f04ca1b6SVasu Dev struct fcoe_ctlr *fip = &fcoe->ctlr; 460f04ca1b6SVasu Dev u8 flogi_maddr[ETH_ALEN]; 461f04ca1b6SVasu Dev const struct net_device_ops *ops; 462f04ca1b6SVasu Dev 463848e7d5bSRobert Love rtnl_lock(); 464848e7d5bSRobert Love 465f04ca1b6SVasu Dev /* 466f04ca1b6SVasu Dev * Don't listen for Ethernet packets anymore. 467f04ca1b6SVasu Dev * synchronize_net() ensures that the packet handlers are not running 468f04ca1b6SVasu Dev * on another CPU. dev_remove_pack() would do that, this calls the 469f04ca1b6SVasu Dev * unsyncronized version __dev_remove_pack() to avoid multiple delays. 470f04ca1b6SVasu Dev */ 471f04ca1b6SVasu Dev __dev_remove_pack(&fcoe->fcoe_packet_type); 472f04ca1b6SVasu Dev __dev_remove_pack(&fcoe->fip_packet_type); 473f04ca1b6SVasu Dev synchronize_net(); 474f04ca1b6SVasu Dev 475f04ca1b6SVasu Dev /* Delete secondary MAC addresses */ 476f04ca1b6SVasu Dev memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); 477f04ca1b6SVasu Dev dev_uc_del(netdev, flogi_maddr); 478f04ca1b6SVasu Dev if (fip->spma) 479f04ca1b6SVasu Dev dev_uc_del(netdev, fip->ctl_src_addr); 480f04ca1b6SVasu Dev if (fip->mode == FIP_MODE_VN2VN) { 481f04ca1b6SVasu Dev dev_mc_del(netdev, FIP_ALL_VN2VN_MACS); 482f04ca1b6SVasu Dev dev_mc_del(netdev, FIP_ALL_P2P_MACS); 483f04ca1b6SVasu Dev } else 484f04ca1b6SVasu Dev dev_mc_del(netdev, FIP_ALL_ENODE_MACS); 485f04ca1b6SVasu Dev 486f04ca1b6SVasu Dev /* Tell the LLD we are done w/ FCoE */ 487f04ca1b6SVasu Dev ops = netdev->netdev_ops; 488f04ca1b6SVasu Dev if (ops->ndo_fcoe_disable) { 489f04ca1b6SVasu Dev if (ops->ndo_fcoe_disable(netdev)) 490f04ca1b6SVasu Dev FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" 491f04ca1b6SVasu Dev " specific feature for LLD.\n"); 492f04ca1b6SVasu Dev } 493b2085a4eSNeerav Parikh 494848e7d5bSRobert Love rtnl_unlock(); 495848e7d5bSRobert Love 496b2085a4eSNeerav Parikh /* Release the self-reference taken during fcoe_interface_create() */ 497f04ca1b6SVasu Dev fcoe_interface_put(fcoe); 498f04ca1b6SVasu Dev } 499f04ca1b6SVasu Dev 500f04ca1b6SVasu Dev /** 5011875f27eSRobert Love * fcoe_fip_recv() - Handler for received FIP frames 5021875f27eSRobert Love * @skb: The receive skb 5031875f27eSRobert Love * @netdev: The associated net device 5041875f27eSRobert Love * @ptype: The packet_type structure which was used to register this handler 5051875f27eSRobert Love * @orig_dev: The original net_device the the skb was received on. 5061875f27eSRobert Love * (in case dev is a bond) 507ab6b85c1SVasu Dev * 508ab6b85c1SVasu Dev * Returns: 0 for success 509ab6b85c1SVasu Dev */ 5101875f27eSRobert Love static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, 511ab6b85c1SVasu Dev struct packet_type *ptype, 512ab6b85c1SVasu Dev struct net_device *orig_dev) 513ab6b85c1SVasu Dev { 514259ad85dSChris Leech struct fcoe_interface *fcoe; 515ab6b85c1SVasu Dev 516259ad85dSChris Leech fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); 5173fe9a0baSChris Leech fcoe_ctlr_recv(&fcoe->ctlr, skb); 518ab6b85c1SVasu Dev return 0; 519ab6b85c1SVasu Dev } 520ab6b85c1SVasu Dev 521ab6b85c1SVasu Dev /** 522980f5156SVasu Dev * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame 523980f5156SVasu Dev * @port: The FCoE port 524980f5156SVasu Dev * @skb: The FIP/FCoE packet to be sent 525980f5156SVasu Dev */ 526980f5156SVasu Dev static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb) 527980f5156SVasu Dev { 528980f5156SVasu Dev if (port->fcoe_pending_queue.qlen) 529980f5156SVasu Dev fcoe_check_wait_queue(port->lport, skb); 530980f5156SVasu Dev else if (fcoe_start_io(skb)) 531980f5156SVasu Dev fcoe_check_wait_queue(port->lport, skb); 532980f5156SVasu Dev } 533980f5156SVasu Dev 534980f5156SVasu Dev /** 5351875f27eSRobert Love * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame 5361875f27eSRobert Love * @fip: The FCoE controller 5371875f27eSRobert Love * @skb: The FIP packet to be sent 538ab6b85c1SVasu Dev */ 539ab6b85c1SVasu Dev static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) 540ab6b85c1SVasu Dev { 5413fe9a0baSChris Leech skb->dev = fcoe_from_ctlr(fip)->netdev; 542980f5156SVasu Dev fcoe_port_send(lport_priv(fip->lp), skb); 543ab6b85c1SVasu Dev } 544ab6b85c1SVasu Dev 545ab6b85c1SVasu Dev /** 5461875f27eSRobert Love * fcoe_update_src_mac() - Update the Ethernet MAC filters 5471875f27eSRobert Love * @lport: The local port to update the source MAC on 5481875f27eSRobert Love * @addr: Unicast MAC address to add 549ab6b85c1SVasu Dev * 550ab6b85c1SVasu Dev * Remove any previously-set unicast MAC filter. 551ab6b85c1SVasu Dev * Add secondary FCoE MAC address filter for our OUI. 552ab6b85c1SVasu Dev */ 55311b56188SChris Leech static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) 554ab6b85c1SVasu Dev { 55511b56188SChris Leech struct fcoe_port *port = lport_priv(lport); 5568597ae8bSBhanu Prakash Gollapudi struct fcoe_interface *fcoe = port->priv; 557ab6b85c1SVasu Dev 558ab6b85c1SVasu Dev rtnl_lock(); 55911b56188SChris Leech if (!is_zero_ether_addr(port->data_src_addr)) 560a748ee24SJiri Pirko dev_uc_del(fcoe->netdev, port->data_src_addr); 56111b56188SChris Leech if (!is_zero_ether_addr(addr)) 562a748ee24SJiri Pirko dev_uc_add(fcoe->netdev, addr); 56311b56188SChris Leech memcpy(port->data_src_addr, addr, ETH_ALEN); 564ab6b85c1SVasu Dev rtnl_unlock(); 565ab6b85c1SVasu Dev } 566ab6b85c1SVasu Dev 567ab6b85c1SVasu Dev /** 56811b56188SChris Leech * fcoe_get_src_mac() - return the Ethernet source address for an lport 56911b56188SChris Leech * @lport: libfc lport 57011b56188SChris Leech */ 57111b56188SChris Leech static u8 *fcoe_get_src_mac(struct fc_lport *lport) 57211b56188SChris Leech { 57311b56188SChris Leech struct fcoe_port *port = lport_priv(lport); 57411b56188SChris Leech 57511b56188SChris Leech return port->data_src_addr; 57611b56188SChris Leech } 57711b56188SChris Leech 57811b56188SChris Leech /** 5791875f27eSRobert Love * fcoe_lport_config() - Set up a local port 5801875f27eSRobert Love * @lport: The local port to be setup 581a703e490SVasu Dev * 582a703e490SVasu Dev * Returns: 0 for success 583a703e490SVasu Dev */ 5841875f27eSRobert Love static int fcoe_lport_config(struct fc_lport *lport) 585a703e490SVasu Dev { 5861875f27eSRobert Love lport->link_up = 0; 5871875f27eSRobert Love lport->qfull = 0; 5881875f27eSRobert Love lport->max_retry_count = 3; 5891875f27eSRobert Love lport->max_rport_retry_count = 3; 5901875f27eSRobert Love lport->e_d_tov = 2 * 1000; /* FC-FS default */ 5911875f27eSRobert Love lport->r_a_tov = 2 * 2 * 1000; 5921875f27eSRobert Love lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | 593a703e490SVasu Dev FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); 5941875f27eSRobert Love lport->does_npiv = 1; 595a703e490SVasu Dev 5961875f27eSRobert Love fc_lport_init_stats(lport); 597a703e490SVasu Dev 598a703e490SVasu Dev /* lport fc_lport related configuration */ 5991875f27eSRobert Love fc_lport_config(lport); 600a703e490SVasu Dev 601a703e490SVasu Dev /* offload related configuration */ 6021875f27eSRobert Love lport->crc_offload = 0; 6031875f27eSRobert Love lport->seq_offload = 0; 6041875f27eSRobert Love lport->lro_enabled = 0; 6051875f27eSRobert Love lport->lro_xid = 0; 6061875f27eSRobert Love lport->lso_max = 0; 607a703e490SVasu Dev 608a703e490SVasu Dev return 0; 609a703e490SVasu Dev } 610a703e490SVasu Dev 611a703e490SVasu Dev /** 61254a5b21dSYi Zou * fcoe_netdev_features_change - Updates the lport's offload flags based 61354a5b21dSYi Zou * on the LLD netdev's FCoE feature flags 61454a5b21dSYi Zou */ 61554a5b21dSYi Zou static void fcoe_netdev_features_change(struct fc_lport *lport, 61654a5b21dSYi Zou struct net_device *netdev) 61754a5b21dSYi Zou { 61854a5b21dSYi Zou mutex_lock(&lport->lp_mutex); 61954a5b21dSYi Zou 62054a5b21dSYi Zou if (netdev->features & NETIF_F_SG) 62154a5b21dSYi Zou lport->sg_supp = 1; 62254a5b21dSYi Zou else 62354a5b21dSYi Zou lport->sg_supp = 0; 62454a5b21dSYi Zou 62554a5b21dSYi Zou if (netdev->features & NETIF_F_FCOE_CRC) { 62654a5b21dSYi Zou lport->crc_offload = 1; 62754a5b21dSYi Zou FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); 62854a5b21dSYi Zou } else { 62954a5b21dSYi Zou lport->crc_offload = 0; 63054a5b21dSYi Zou } 63154a5b21dSYi Zou 63254a5b21dSYi Zou if (netdev->features & NETIF_F_FSO) { 63354a5b21dSYi Zou lport->seq_offload = 1; 63454a5b21dSYi Zou lport->lso_max = netdev->gso_max_size; 63554a5b21dSYi Zou FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", 63654a5b21dSYi Zou lport->lso_max); 63754a5b21dSYi Zou } else { 63854a5b21dSYi Zou lport->seq_offload = 0; 63954a5b21dSYi Zou lport->lso_max = 0; 64054a5b21dSYi Zou } 64154a5b21dSYi Zou 64254a5b21dSYi Zou if (netdev->fcoe_ddp_xid) { 64354a5b21dSYi Zou lport->lro_enabled = 1; 64454a5b21dSYi Zou lport->lro_xid = netdev->fcoe_ddp_xid; 64554a5b21dSYi Zou FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", 64654a5b21dSYi Zou lport->lro_xid); 64754a5b21dSYi Zou } else { 64854a5b21dSYi Zou lport->lro_enabled = 0; 64954a5b21dSYi Zou lport->lro_xid = 0; 65054a5b21dSYi Zou } 65154a5b21dSYi Zou 65254a5b21dSYi Zou mutex_unlock(&lport->lp_mutex); 65354a5b21dSYi Zou } 65454a5b21dSYi Zou 65554a5b21dSYi Zou /** 6561875f27eSRobert Love * fcoe_netdev_config() - Set up net devive for SW FCoE 6571875f27eSRobert Love * @lport: The local port that is associated with the net device 6581875f27eSRobert Love * @netdev: The associated net device 659a703e490SVasu Dev * 6601875f27eSRobert Love * Must be called after fcoe_lport_config() as it will use local port mutex 661a703e490SVasu Dev * 662a703e490SVasu Dev * Returns: 0 for success 663a703e490SVasu Dev */ 6641875f27eSRobert Love static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) 665a703e490SVasu Dev { 666a703e490SVasu Dev u32 mfs; 667a703e490SVasu Dev u64 wwnn, wwpn; 66825024989SChris Leech struct fcoe_interface *fcoe; 669014f5c3fSChris Leech struct fcoe_port *port; 670a703e490SVasu Dev 671a703e490SVasu Dev /* Setup lport private data to point to fcoe softc */ 6721875f27eSRobert Love port = lport_priv(lport); 6738597ae8bSBhanu Prakash Gollapudi fcoe = port->priv; 674a703e490SVasu Dev 675a703e490SVasu Dev /* 676a703e490SVasu Dev * Determine max frame size based on underlying device and optional 677a703e490SVasu Dev * user-configured limit. If the MFS is too low, fcoe_link_ok() 678a703e490SVasu Dev * will return 0, so do this first. 679a703e490SVasu Dev */ 6807221d7e5SYi Zou mfs = netdev->mtu; 6817221d7e5SYi Zou if (netdev->features & NETIF_F_FCOE_MTU) { 6827221d7e5SYi Zou mfs = FCOE_MTU; 6837221d7e5SYi Zou FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); 6847221d7e5SYi Zou } 6857221d7e5SYi Zou mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); 6861875f27eSRobert Love if (fc_set_mfs(lport, mfs)) 687a703e490SVasu Dev return -EINVAL; 688a703e490SVasu Dev 689a703e490SVasu Dev /* offload features support */ 69054a5b21dSYi Zou fcoe_netdev_features_change(lport, netdev); 691a703e490SVasu Dev 692014f5c3fSChris Leech skb_queue_head_init(&port->fcoe_pending_queue); 693014f5c3fSChris Leech port->fcoe_pending_queue_active = 0; 6941875f27eSRobert Love setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport); 695a703e490SVasu Dev 6965e4f8fe7SRobert Love fcoe_link_speed_update(lport); 6975e4f8fe7SRobert Love 6981875f27eSRobert Love if (!lport->vport) { 699dcece412SYi Zou if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN)) 70075ea89efSYi Zou wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0); 7011875f27eSRobert Love fc_set_wwnn(lport, wwnn); 702dcece412SYi Zou if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN)) 703dcece412SYi Zou wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 704cf4aebcaSVasu Dev 2, 0); 7051875f27eSRobert Love fc_set_wwpn(lport, wwpn); 7069a05753bSChris Leech } 707a703e490SVasu Dev 708a703e490SVasu Dev return 0; 709a703e490SVasu Dev } 710a703e490SVasu Dev 711a703e490SVasu Dev /** 7121875f27eSRobert Love * fcoe_shost_config() - Set up the SCSI host associated with a local port 7131875f27eSRobert Love * @lport: The local port 7141875f27eSRobert Love * @dev: The device associated with the SCSI host 715a703e490SVasu Dev * 716a703e490SVasu Dev * Must be called after fcoe_lport_config() and fcoe_netdev_config() 717a703e490SVasu Dev * 718a703e490SVasu Dev * Returns: 0 for success 719a703e490SVasu Dev */ 7208ba00a4bSVasu Dev static int fcoe_shost_config(struct fc_lport *lport, struct device *dev) 721a703e490SVasu Dev { 722a703e490SVasu Dev int rc = 0; 723a703e490SVasu Dev 724a703e490SVasu Dev /* lport scsi host config */ 7251875f27eSRobert Love lport->host->max_lun = FCOE_MAX_LUN; 7261875f27eSRobert Love lport->host->max_id = FCOE_MAX_FCP_TARGET; 7271875f27eSRobert Love lport->host->max_channel = 0; 728da87bfabSVasu Dev lport->host->max_cmd_len = FCOE_MAX_CMD_LEN; 729da87bfabSVasu Dev 7301875f27eSRobert Love if (lport->vport) 7318ca86f84SYi Zou lport->host->transportt = fcoe_vport_scsi_transport; 732e9084bb8SChris Leech else 7338ca86f84SYi Zou lport->host->transportt = fcoe_nport_scsi_transport; 734a703e490SVasu Dev 735a703e490SVasu Dev /* add the new host to the SCSI-ml */ 7361875f27eSRobert Love rc = scsi_add_host(lport->host, dev); 737a703e490SVasu Dev if (rc) { 7381875f27eSRobert Love FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " 739d5488eb9SRobert Love "error on scsi_add_host\n"); 740a703e490SVasu Dev return rc; 741a703e490SVasu Dev } 7429a05753bSChris Leech 7431875f27eSRobert Love if (!lport->vport) 7444be929beSAlexey Dobriyan fc_host_max_npiv_vports(lport->host) = USHRT_MAX; 7459a05753bSChris Leech 7461875f27eSRobert Love snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, 7475baa17c3SChris Leech "%s v%s over %s", FCOE_NAME, FCOE_VERSION, 7481875f27eSRobert Love fcoe_netdev(lport)->name); 749a703e490SVasu Dev 750a703e490SVasu Dev return 0; 751a703e490SVasu Dev } 752a703e490SVasu Dev 7536fef3902SNeerav Parikh 7546fef3902SNeerav Parikh /** 7556fef3902SNeerav Parikh * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE 7566fef3902SNeerav Parikh * @lport: The local port that is associated with the net device 7576fef3902SNeerav Parikh * @netdev: The associated net device 7586fef3902SNeerav Parikh * 7596fef3902SNeerav Parikh * Must be called after fcoe_shost_config() as it will use local port mutex 7606fef3902SNeerav Parikh * 7616fef3902SNeerav Parikh */ 7626fef3902SNeerav Parikh static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev) 7636fef3902SNeerav Parikh { 7646fef3902SNeerav Parikh struct fcoe_interface *fcoe; 7656fef3902SNeerav Parikh struct fcoe_port *port; 7666fef3902SNeerav Parikh struct net_device *realdev; 7676fef3902SNeerav Parikh int rc; 7686fef3902SNeerav Parikh struct netdev_fcoe_hbainfo fdmi; 7696fef3902SNeerav Parikh 7706fef3902SNeerav Parikh port = lport_priv(lport); 7716fef3902SNeerav Parikh fcoe = port->priv; 7726fef3902SNeerav Parikh realdev = fcoe->realdev; 7736fef3902SNeerav Parikh 7746fef3902SNeerav Parikh if (!realdev) 7756fef3902SNeerav Parikh return; 7766fef3902SNeerav Parikh 7776fef3902SNeerav Parikh /* No FDMI state m/c for NPIV ports */ 7786fef3902SNeerav Parikh if (lport->vport) 7796fef3902SNeerav Parikh return; 7806fef3902SNeerav Parikh 7816fef3902SNeerav Parikh if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) { 7826fef3902SNeerav Parikh memset(&fdmi, 0, sizeof(fdmi)); 7836fef3902SNeerav Parikh rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev, 7846fef3902SNeerav Parikh &fdmi); 7856fef3902SNeerav Parikh if (rc) { 7866fef3902SNeerav Parikh printk(KERN_INFO "fcoe: Failed to retrieve FDMI " 7876fef3902SNeerav Parikh "information from netdev.\n"); 7886fef3902SNeerav Parikh return; 7896fef3902SNeerav Parikh } 7906fef3902SNeerav Parikh 7916fef3902SNeerav Parikh snprintf(fc_host_serial_number(lport->host), 7926fef3902SNeerav Parikh FC_SERIAL_NUMBER_SIZE, 7936fef3902SNeerav Parikh "%s", 7946fef3902SNeerav Parikh fdmi.serial_number); 7956fef3902SNeerav Parikh snprintf(fc_host_manufacturer(lport->host), 7966fef3902SNeerav Parikh FC_SERIAL_NUMBER_SIZE, 7976fef3902SNeerav Parikh "%s", 7986fef3902SNeerav Parikh fdmi.manufacturer); 7996fef3902SNeerav Parikh snprintf(fc_host_model(lport->host), 8006fef3902SNeerav Parikh FC_SYMBOLIC_NAME_SIZE, 8016fef3902SNeerav Parikh "%s", 8026fef3902SNeerav Parikh fdmi.model); 8036fef3902SNeerav Parikh snprintf(fc_host_model_description(lport->host), 8046fef3902SNeerav Parikh FC_SYMBOLIC_NAME_SIZE, 8056fef3902SNeerav Parikh "%s", 8066fef3902SNeerav Parikh fdmi.model_description); 8076fef3902SNeerav Parikh snprintf(fc_host_hardware_version(lport->host), 8086fef3902SNeerav Parikh FC_VERSION_STRING_SIZE, 8096fef3902SNeerav Parikh "%s", 8106fef3902SNeerav Parikh fdmi.hardware_version); 8116fef3902SNeerav Parikh snprintf(fc_host_driver_version(lport->host), 8126fef3902SNeerav Parikh FC_VERSION_STRING_SIZE, 8136fef3902SNeerav Parikh "%s", 8146fef3902SNeerav Parikh fdmi.driver_version); 8156fef3902SNeerav Parikh snprintf(fc_host_optionrom_version(lport->host), 8166fef3902SNeerav Parikh FC_VERSION_STRING_SIZE, 8176fef3902SNeerav Parikh "%s", 8186fef3902SNeerav Parikh fdmi.optionrom_version); 8196fef3902SNeerav Parikh snprintf(fc_host_firmware_version(lport->host), 8206fef3902SNeerav Parikh FC_VERSION_STRING_SIZE, 8216fef3902SNeerav Parikh "%s", 8226fef3902SNeerav Parikh fdmi.firmware_version); 8236fef3902SNeerav Parikh 8246fef3902SNeerav Parikh /* Enable FDMI lport states */ 8256fef3902SNeerav Parikh lport->fdmi_enabled = 1; 8266fef3902SNeerav Parikh } else { 8276fef3902SNeerav Parikh lport->fdmi_enabled = 0; 8286fef3902SNeerav Parikh printk(KERN_INFO "fcoe: No FDMI support.\n"); 8296fef3902SNeerav Parikh } 8306fef3902SNeerav Parikh } 8316fef3902SNeerav Parikh 8321875f27eSRobert Love /** 8331875f27eSRobert Love * fcoe_oem_match() - The match routine for the offloaded exchange manager 8341875f27eSRobert Love * @fp: The I/O frame 835d7179680SVasu Dev * 8361875f27eSRobert Love * This routine will be associated with an exchange manager (EM). When 8371875f27eSRobert Love * the libfc exchange handling code is looking for an EM to use it will 8381875f27eSRobert Love * call this routine and pass it the frame that it wishes to send. This 8391875f27eSRobert Love * routine will return True if the associated EM is to be used and False 8401875f27eSRobert Love * if the echange code should continue looking for an EM. 8411875f27eSRobert Love * 8421875f27eSRobert Love * The offload EM that this routine is associated with will handle any 8431875f27eSRobert Love * packets that are for SCSI read requests. 8441875f27eSRobert Love * 8451ff9918bSKiran Patil * This has been enhanced to work when FCoE stack is operating in target 8461ff9918bSKiran Patil * mode. 8471ff9918bSKiran Patil * 8481875f27eSRobert Love * Returns: True for read types I/O, otherwise returns false. 849d7179680SVasu Dev */ 8507c9c6841SBart Van Assche static bool fcoe_oem_match(struct fc_frame *fp) 851d7179680SVasu Dev { 8521ff9918bSKiran Patil struct fc_frame_header *fh = fc_frame_header_get(fp); 8531ff9918bSKiran Patil struct fcp_cmnd *fcp; 8541ff9918bSKiran Patil 8551ff9918bSKiran Patil if (fc_fcp_is_read(fr_fsp(fp)) && 8561ff9918bSKiran Patil (fr_fsp(fp)->data_len > fcoe_ddp_min)) 8571ff9918bSKiran Patil return true; 858a762dce4SYi Zou else if ((fr_fsp(fp) == NULL) && 859a762dce4SYi Zou (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) && 860a762dce4SYi Zou (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) { 8611ff9918bSKiran Patil fcp = fc_frame_payload_get(fp, sizeof(*fcp)); 862a762dce4SYi Zou if ((fcp->fc_flags & FCP_CFL_WRDATA) && 863a762dce4SYi Zou (ntohl(fcp->fc_dl) > fcoe_ddp_min)) 8641ff9918bSKiran Patil return true; 8651ff9918bSKiran Patil } 8661ff9918bSKiran Patil return false; 867d7179680SVasu Dev } 868d7179680SVasu Dev 869a703e490SVasu Dev /** 8701875f27eSRobert Love * fcoe_em_config() - Allocate and configure an exchange manager 8711875f27eSRobert Love * @lport: The local port that the new EM will be associated with 872a703e490SVasu Dev * 873a703e490SVasu Dev * Returns: 0 on success 874a703e490SVasu Dev */ 8751875f27eSRobert Love static inline int fcoe_em_config(struct fc_lport *lport) 876a703e490SVasu Dev { 8771875f27eSRobert Love struct fcoe_port *port = lport_priv(lport); 8788597ae8bSBhanu Prakash Gollapudi struct fcoe_interface *fcoe = port->priv; 87925024989SChris Leech struct fcoe_interface *oldfcoe = NULL; 8801d1b88dcSVasu Dev struct net_device *old_real_dev, *cur_real_dev; 881d7179680SVasu Dev u16 min_xid = FCOE_MIN_XID; 882d7179680SVasu Dev u16 max_xid = FCOE_MAX_XID; 883d7179680SVasu Dev 884d7179680SVasu Dev /* 885d7179680SVasu Dev * Check if need to allocate an em instance for 886d7179680SVasu Dev * offload exchange ids to be shared across all VN_PORTs/lport. 887d7179680SVasu Dev */ 8881875f27eSRobert Love if (!lport->lro_enabled || !lport->lro_xid || 8891875f27eSRobert Love (lport->lro_xid >= max_xid)) { 8901875f27eSRobert Love lport->lro_xid = 0; 891d7179680SVasu Dev goto skip_oem; 892d7179680SVasu Dev } 893d7179680SVasu Dev 894d7179680SVasu Dev /* 895d7179680SVasu Dev * Reuse existing offload em instance in case 8961d1b88dcSVasu Dev * it is already allocated on real eth device 897d7179680SVasu Dev */ 89825024989SChris Leech if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) 89925024989SChris Leech cur_real_dev = vlan_dev_real_dev(fcoe->netdev); 9001d1b88dcSVasu Dev else 90125024989SChris Leech cur_real_dev = fcoe->netdev; 9021d1b88dcSVasu Dev 90325024989SChris Leech list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { 90425024989SChris Leech if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) 90525024989SChris Leech old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); 9061d1b88dcSVasu Dev else 90725024989SChris Leech old_real_dev = oldfcoe->netdev; 9081d1b88dcSVasu Dev 9091d1b88dcSVasu Dev if (cur_real_dev == old_real_dev) { 910991cbb60SChris Leech fcoe->oem = oldfcoe->oem; 911d7179680SVasu Dev break; 912d7179680SVasu Dev } 913d7179680SVasu Dev } 914d7179680SVasu Dev 915991cbb60SChris Leech if (fcoe->oem) { 9161875f27eSRobert Love if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { 917d7179680SVasu Dev printk(KERN_ERR "fcoe_em_config: failed to add " 918d7179680SVasu Dev "offload em:%p on interface:%s\n", 919991cbb60SChris Leech fcoe->oem, fcoe->netdev->name); 920a703e490SVasu Dev return -ENOMEM; 921d7179680SVasu Dev } 922d7179680SVasu Dev } else { 9231875f27eSRobert Love fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, 9241875f27eSRobert Love FCOE_MIN_XID, lport->lro_xid, 925d7179680SVasu Dev fcoe_oem_match); 926991cbb60SChris Leech if (!fcoe->oem) { 927d7179680SVasu Dev printk(KERN_ERR "fcoe_em_config: failed to allocate " 928d7179680SVasu Dev "em for offload exches on interface:%s\n", 92925024989SChris Leech fcoe->netdev->name); 930d7179680SVasu Dev return -ENOMEM; 931d7179680SVasu Dev } 932d7179680SVasu Dev } 933d7179680SVasu Dev 934d7179680SVasu Dev /* 935d7179680SVasu Dev * Exclude offload EM xid range from next EM xid range. 936d7179680SVasu Dev */ 9371875f27eSRobert Love min_xid += lport->lro_xid + 1; 938d7179680SVasu Dev 939d7179680SVasu Dev skip_oem: 9401875f27eSRobert Love if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { 941d7179680SVasu Dev printk(KERN_ERR "fcoe_em_config: failed to " 94225024989SChris Leech "allocate em on interface %s\n", fcoe->netdev->name); 943d7179680SVasu Dev return -ENOMEM; 944d7179680SVasu Dev } 945a703e490SVasu Dev 946a703e490SVasu Dev return 0; 947a703e490SVasu Dev } 948a703e490SVasu Dev 949a703e490SVasu Dev /** 9501875f27eSRobert Love * fcoe_if_destroy() - Tear down a SW FCoE instance 9511875f27eSRobert Love * @lport: The local port to be destroyed 95234ce27bcSVasu Dev * 953a703e490SVasu Dev */ 954af7f85d9SChris Leech static void fcoe_if_destroy(struct fc_lport *lport) 955a703e490SVasu Dev { 956b2085a4eSNeerav Parikh struct fcoe_port *port = lport_priv(lport); 957b2085a4eSNeerav Parikh struct fcoe_interface *fcoe = port->priv; 958b2085a4eSNeerav Parikh struct net_device *netdev = fcoe->netdev; 959b2085a4eSNeerav Parikh 960b2085a4eSNeerav Parikh FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); 961b2085a4eSNeerav Parikh 962b2085a4eSNeerav Parikh /* Logout of the fabric */ 963b2085a4eSNeerav Parikh fc_fabric_logoff(lport); 964b2085a4eSNeerav Parikh 965b2085a4eSNeerav Parikh /* Cleanup the fc_lport */ 966b2085a4eSNeerav Parikh fc_lport_destroy(lport); 967b2085a4eSNeerav Parikh 968b2085a4eSNeerav Parikh /* Stop the transmit retry timer */ 969b2085a4eSNeerav Parikh del_timer_sync(&port->timer); 970b2085a4eSNeerav Parikh 971b2085a4eSNeerav Parikh /* Free existing transmit skbs */ 972b2085a4eSNeerav Parikh fcoe_clean_pending_queue(lport); 973b2085a4eSNeerav Parikh 974b2085a4eSNeerav Parikh rtnl_lock(); 975b2085a4eSNeerav Parikh if (!is_zero_ether_addr(port->data_src_addr)) 976b2085a4eSNeerav Parikh dev_uc_del(netdev, port->data_src_addr); 977b2085a4eSNeerav Parikh rtnl_unlock(); 978b2085a4eSNeerav Parikh 979b2085a4eSNeerav Parikh /* Release reference held in fcoe_if_create() */ 980b2085a4eSNeerav Parikh fcoe_interface_put(fcoe); 981b2085a4eSNeerav Parikh 98254b649f8SChris Leech /* Free queued packets for the per-CPU receive threads */ 98354b649f8SChris Leech fcoe_percpu_clean(lport); 98454b649f8SChris Leech 985a703e490SVasu Dev /* Detach from the scsi-ml */ 986af7f85d9SChris Leech fc_remove_host(lport->host); 987af7f85d9SChris Leech scsi_remove_host(lport->host); 988a703e490SVasu Dev 98980e736f8SYi Zou /* Destroy lport scsi_priv */ 99080e736f8SYi Zou fc_fcp_destroy(lport); 99180e736f8SYi Zou 992a703e490SVasu Dev /* There are no more rports or I/O, free the EM */ 993af7f85d9SChris Leech fc_exch_mgr_free(lport); 994a703e490SVasu Dev 995a703e490SVasu Dev /* Free memory used by statistical counters */ 996af7f85d9SChris Leech fc_lport_free_stats(lport); 997a703e490SVasu Dev 9982e70e241SChris Leech /* Release the Scsi_Host */ 999af7f85d9SChris Leech scsi_host_put(lport->host); 1000a703e490SVasu Dev } 1001a703e490SVasu Dev 10021875f27eSRobert Love /** 10031875f27eSRobert Love * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device 10041875f27eSRobert Love * @lport: The local port to setup DDP for 10051875f27eSRobert Love * @xid: The exchange ID for this DDP transfer 10061875f27eSRobert Love * @sgl: The scatterlist describing this transfer 10071875f27eSRobert Love * @sgc: The number of sg items 1008a703e490SVasu Dev * 10091875f27eSRobert Love * Returns: 0 if the DDP context was not configured 1010a703e490SVasu Dev */ 10111875f27eSRobert Love static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, 1012a703e490SVasu Dev struct scatterlist *sgl, unsigned int sgc) 1013a703e490SVasu Dev { 10141875f27eSRobert Love struct net_device *netdev = fcoe_netdev(lport); 1015a703e490SVasu Dev 10161875f27eSRobert Love if (netdev->netdev_ops->ndo_fcoe_ddp_setup) 10171875f27eSRobert Love return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, 10181875f27eSRobert Love xid, sgl, 10191875f27eSRobert Love sgc); 1020a703e490SVasu Dev 1021a703e490SVasu Dev return 0; 1022a703e490SVasu Dev } 1023a703e490SVasu Dev 1024a703e490SVasu Dev /** 102571f89491SYi Zou * fcoe_ddp_target() - Call a LLD's ddp_target through the net device 102671f89491SYi Zou * @lport: The local port to setup DDP for 102771f89491SYi Zou * @xid: The exchange ID for this DDP transfer 102871f89491SYi Zou * @sgl: The scatterlist describing this transfer 102971f89491SYi Zou * @sgc: The number of sg items 103071f89491SYi Zou * 103171f89491SYi Zou * Returns: 0 if the DDP context was not configured 103271f89491SYi Zou */ 103371f89491SYi Zou static int fcoe_ddp_target(struct fc_lport *lport, u16 xid, 103471f89491SYi Zou struct scatterlist *sgl, unsigned int sgc) 103571f89491SYi Zou { 103671f89491SYi Zou struct net_device *netdev = fcoe_netdev(lport); 103771f89491SYi Zou 103871f89491SYi Zou if (netdev->netdev_ops->ndo_fcoe_ddp_target) 103971f89491SYi Zou return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid, 104071f89491SYi Zou sgl, sgc); 104171f89491SYi Zou 104271f89491SYi Zou return 0; 104371f89491SYi Zou } 104471f89491SYi Zou 104571f89491SYi Zou 104671f89491SYi Zou /** 10471875f27eSRobert Love * fcoe_ddp_done() - Call a LLD's ddp_done through the net device 10481875f27eSRobert Love * @lport: The local port to complete DDP on 10491875f27eSRobert Love * @xid: The exchange ID for this DDP transfer 1050a703e490SVasu Dev * 10511875f27eSRobert Love * Returns: the length of data that have been completed by DDP 10521875f27eSRobert Love */ 10531875f27eSRobert Love static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) 10541875f27eSRobert Love { 10551875f27eSRobert Love struct net_device *netdev = fcoe_netdev(lport); 10561875f27eSRobert Love 10571875f27eSRobert Love if (netdev->netdev_ops->ndo_fcoe_ddp_done) 10581875f27eSRobert Love return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); 10591875f27eSRobert Love return 0; 10601875f27eSRobert Love } 10611875f27eSRobert Love 10621875f27eSRobert Love /** 10631875f27eSRobert Love * fcoe_if_create() - Create a FCoE instance on an interface 10641875f27eSRobert Love * @fcoe: The FCoE interface to create a local port on 10651875f27eSRobert Love * @parent: The device pointer to be the parent in sysfs for the SCSI host 10661875f27eSRobert Love * @npiv: Indicates if the port is a vport or not 10671875f27eSRobert Love * 10681875f27eSRobert Love * Creates a fc_lport instance and a Scsi_Host instance and configure them. 1069a703e490SVasu Dev * 1070af7f85d9SChris Leech * Returns: The allocated fc_lport or an error pointer 1071a703e490SVasu Dev */ 1072030f4e00SChris Leech static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, 10739a05753bSChris Leech struct device *parent, int npiv) 1074a703e490SVasu Dev { 10751875f27eSRobert Love struct net_device *netdev = fcoe->netdev; 107672fa396bSVasu Dev struct fc_lport *lport, *n_port; 1077014f5c3fSChris Leech struct fcoe_port *port; 107872fa396bSVasu Dev struct Scsi_Host *shost; 10791875f27eSRobert Love int rc; 10809a05753bSChris Leech /* 10819a05753bSChris Leech * parent is only a vport if npiv is 1, 10829a05753bSChris Leech * but we'll only use vport in that case so go ahead and set it 10839a05753bSChris Leech */ 10849a05753bSChris Leech struct fc_vport *vport = dev_to_vport(parent); 1085a703e490SVasu Dev 1086d5488eb9SRobert Love FCOE_NETDEV_DBG(netdev, "Create Interface\n"); 1087a703e490SVasu Dev 108872fa396bSVasu Dev if (!npiv) 108972fa396bSVasu Dev lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port)); 109072fa396bSVasu Dev else 109172fa396bSVasu Dev lport = libfc_vport_create(vport, sizeof(*port)); 109272fa396bSVasu Dev 109386221969SChris Leech if (!lport) { 1094014f5c3fSChris Leech FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); 1095014f5c3fSChris Leech rc = -ENOMEM; 1096030f4e00SChris Leech goto out; 1097014f5c3fSChris Leech } 1098014f5c3fSChris Leech port = lport_priv(lport); 10992e70e241SChris Leech port->lport = lport; 11008597ae8bSBhanu Prakash Gollapudi port->priv = fcoe; 11018597ae8bSBhanu Prakash Gollapudi port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH; 11028597ae8bSBhanu Prakash Gollapudi port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH; 11032e70e241SChris Leech INIT_WORK(&port->destroy_work, fcoe_destroy_work); 1104a703e490SVasu Dev 11051875f27eSRobert Love /* configure a fc_lport including the exchange manager */ 1106af7f85d9SChris Leech rc = fcoe_lport_config(lport); 1107a703e490SVasu Dev if (rc) { 1108d5488eb9SRobert Love FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " 1109d5488eb9SRobert Love "interface\n"); 1110a703e490SVasu Dev goto out_host_put; 1111a703e490SVasu Dev } 1112a703e490SVasu Dev 11139a05753bSChris Leech if (npiv) { 11149f8f3aa6SChris Leech FCOE_NETDEV_DBG(netdev, "Setting vport names, " 11159f8f3aa6SChris Leech "%16.16llx %16.16llx\n", 11169a05753bSChris Leech vport->node_name, vport->port_name); 11179a05753bSChris Leech fc_set_wwnn(lport, vport->node_name); 11189a05753bSChris Leech fc_set_wwpn(lport, vport->port_name); 11199a05753bSChris Leech } 11209a05753bSChris Leech 1121ab6b85c1SVasu Dev /* configure lport network properties */ 1122af7f85d9SChris Leech rc = fcoe_netdev_config(lport, netdev); 1123ab6b85c1SVasu Dev if (rc) { 1124d5488eb9SRobert Love FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " 1125d5488eb9SRobert Love "interface\n"); 112654b649f8SChris Leech goto out_lp_destroy; 1127ab6b85c1SVasu Dev } 112897c8389dSJoe Eykholt 1129a703e490SVasu Dev /* configure lport scsi host properties */ 11308ba00a4bSVasu Dev rc = fcoe_shost_config(lport, parent); 1131a703e490SVasu Dev if (rc) { 1132d5488eb9SRobert Love FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " 1133d5488eb9SRobert Love "interface\n"); 113454b649f8SChris Leech goto out_lp_destroy; 1135a703e490SVasu Dev } 1136a703e490SVasu Dev 1137a703e490SVasu Dev /* Initialize the library */ 1138e10f8c66SJoe Eykholt rc = fcoe_libfc_config(lport, &fcoe->ctlr, &fcoe_libfc_fcn_templ, 1); 1139a703e490SVasu Dev if (rc) { 1140d5488eb9SRobert Love FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " 1141d5488eb9SRobert Love "interface\n"); 1142a703e490SVasu Dev goto out_lp_destroy; 1143a703e490SVasu Dev } 1144a703e490SVasu Dev 11456fef3902SNeerav Parikh /* Initialized FDMI information */ 11466fef3902SNeerav Parikh fcoe_fdmi_info(lport, netdev); 11476fef3902SNeerav Parikh 1148e8af4d43SVasu Dev /* 1149e8af4d43SVasu Dev * fcoe_em_alloc() and fcoe_hostlist_add() both 11509a05753bSChris Leech * need to be atomic with respect to other changes to the 11519a05753bSChris Leech * hostlist since fcoe_em_alloc() looks for an existing EM 1152e8af4d43SVasu Dev * instance on host list updated by fcoe_hostlist_add(). 1153c863df33SChris Leech * 11549a05753bSChris Leech * This is currently handled through the fcoe_config_mutex 11559a05753bSChris Leech * begin held. 1156e8af4d43SVasu Dev */ 115772fa396bSVasu Dev if (!npiv) 115896316099SVasu Dev /* lport exch manager allocation */ 1159af7f85d9SChris Leech rc = fcoe_em_config(lport); 116072fa396bSVasu Dev else { 116172fa396bSVasu Dev shost = vport_to_shost(vport); 116272fa396bSVasu Dev n_port = shost_priv(shost); 116372fa396bSVasu Dev rc = fc_exch_mgr_list_clone(n_port, lport); 116496316099SVasu Dev } 116572fa396bSVasu Dev 116672fa396bSVasu Dev if (rc) { 116772fa396bSVasu Dev FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n"); 116872fa396bSVasu Dev goto out_lp_destroy; 11699a05753bSChris Leech } 117096316099SVasu Dev 1171030f4e00SChris Leech fcoe_interface_get(fcoe); 1172af7f85d9SChris Leech return lport; 1173a703e490SVasu Dev 1174a703e490SVasu Dev out_lp_destroy: 1175af7f85d9SChris Leech fc_exch_mgr_free(lport); 1176a703e490SVasu Dev out_host_put: 1177af7f85d9SChris Leech scsi_host_put(lport->host); 1178af7f85d9SChris Leech out: 1179af7f85d9SChris Leech return ERR_PTR(rc); 1180a703e490SVasu Dev } 1181a703e490SVasu Dev 1182a703e490SVasu Dev /** 11831875f27eSRobert Love * fcoe_if_init() - Initialization routine for fcoe.ko 11841875f27eSRobert Love * 11851875f27eSRobert Love * Attaches the SW FCoE transport to the FC transport 1186a703e490SVasu Dev * 1187a703e490SVasu Dev * Returns: 0 on success 1188a703e490SVasu Dev */ 1189a703e490SVasu Dev static int __init fcoe_if_init(void) 1190a703e490SVasu Dev { 1191a703e490SVasu Dev /* attach to scsi transport */ 11928ca86f84SYi Zou fcoe_nport_scsi_transport = 11938ca86f84SYi Zou fc_attach_transport(&fcoe_nport_fc_functions); 11948ca86f84SYi Zou fcoe_vport_scsi_transport = 11958ca86f84SYi Zou fc_attach_transport(&fcoe_vport_fc_functions); 1196a703e490SVasu Dev 11978ca86f84SYi Zou if (!fcoe_nport_scsi_transport) { 1198d5488eb9SRobert Love printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); 1199a703e490SVasu Dev return -ENODEV; 1200a703e490SVasu Dev } 1201a703e490SVasu Dev 1202a703e490SVasu Dev return 0; 1203a703e490SVasu Dev } 1204a703e490SVasu Dev 1205a703e490SVasu Dev /** 12061875f27eSRobert Love * fcoe_if_exit() - Tear down fcoe.ko 12071875f27eSRobert Love * 12081875f27eSRobert Love * Detaches the SW FCoE transport from the FC transport 1209a703e490SVasu Dev * 1210a703e490SVasu Dev * Returns: 0 on success 1211a703e490SVasu Dev */ 12127c9c6841SBart Van Assche static int __exit fcoe_if_exit(void) 1213a703e490SVasu Dev { 12148ca86f84SYi Zou fc_release_transport(fcoe_nport_scsi_transport); 12158ca86f84SYi Zou fc_release_transport(fcoe_vport_scsi_transport); 12168ca86f84SYi Zou fcoe_nport_scsi_transport = NULL; 12178ca86f84SYi Zou fcoe_vport_scsi_transport = NULL; 1218a703e490SVasu Dev return 0; 1219a703e490SVasu Dev } 1220a703e490SVasu Dev 1221a703e490SVasu Dev /** 12221875f27eSRobert Love * fcoe_percpu_thread_create() - Create a receive thread for an online CPU 12231875f27eSRobert Love * @cpu: The CPU index of the CPU to create a receive thread for 1224a703e490SVasu Dev */ 1225a703e490SVasu Dev static void fcoe_percpu_thread_create(unsigned int cpu) 1226a703e490SVasu Dev { 1227a703e490SVasu Dev struct fcoe_percpu_s *p; 1228a703e490SVasu Dev struct task_struct *thread; 1229a703e490SVasu Dev 1230a703e490SVasu Dev p = &per_cpu(fcoe_percpu, cpu); 1231a703e490SVasu Dev 12325c609ff9SEric Dumazet thread = kthread_create_on_node(fcoe_percpu_receive_thread, 12335c609ff9SEric Dumazet (void *)p, cpu_to_node(cpu), 12345c609ff9SEric Dumazet "fcoethread/%d", cpu); 1235a703e490SVasu Dev 1236e7a51997SJoe Eykholt if (likely(!IS_ERR(thread))) { 1237a703e490SVasu Dev kthread_bind(thread, cpu); 1238a703e490SVasu Dev wake_up_process(thread); 1239a703e490SVasu Dev 1240a703e490SVasu Dev spin_lock_bh(&p->fcoe_rx_list.lock); 1241a703e490SVasu Dev p->thread = thread; 1242a703e490SVasu Dev spin_unlock_bh(&p->fcoe_rx_list.lock); 1243a703e490SVasu Dev } 1244a703e490SVasu Dev } 1245a703e490SVasu Dev 1246a703e490SVasu Dev /** 12471875f27eSRobert Love * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU 12481875f27eSRobert Love * @cpu: The CPU index of the CPU whose receive thread is to be destroyed 1249a703e490SVasu Dev * 1250a703e490SVasu Dev * Destroys a per-CPU Rx thread. Any pending skbs are moved to the 1251a703e490SVasu Dev * current CPU's Rx thread. If the thread being destroyed is bound to 1252a703e490SVasu Dev * the CPU processing this context the skbs will be freed. 1253a703e490SVasu Dev */ 1254a703e490SVasu Dev static void fcoe_percpu_thread_destroy(unsigned int cpu) 1255a703e490SVasu Dev { 1256a703e490SVasu Dev struct fcoe_percpu_s *p; 1257a703e490SVasu Dev struct task_struct *thread; 1258a703e490SVasu Dev struct page *crc_eof; 1259a703e490SVasu Dev struct sk_buff *skb; 1260a703e490SVasu Dev #ifdef CONFIG_SMP 1261a703e490SVasu Dev struct fcoe_percpu_s *p0; 1262f018b73aSJoe Eykholt unsigned targ_cpu = get_cpu(); 1263a703e490SVasu Dev #endif /* CONFIG_SMP */ 1264a703e490SVasu Dev 1265d5488eb9SRobert Love FCOE_DBG("Destroying receive thread for CPU %d\n", cpu); 1266a703e490SVasu Dev 1267a703e490SVasu Dev /* Prevent any new skbs from being queued for this CPU. */ 1268a703e490SVasu Dev p = &per_cpu(fcoe_percpu, cpu); 1269a703e490SVasu Dev spin_lock_bh(&p->fcoe_rx_list.lock); 1270a703e490SVasu Dev thread = p->thread; 1271a703e490SVasu Dev p->thread = NULL; 1272a703e490SVasu Dev crc_eof = p->crc_eof_page; 1273a703e490SVasu Dev p->crc_eof_page = NULL; 1274a703e490SVasu Dev p->crc_eof_offset = 0; 1275a703e490SVasu Dev spin_unlock_bh(&p->fcoe_rx_list.lock); 1276a703e490SVasu Dev 1277a703e490SVasu Dev #ifdef CONFIG_SMP 1278a703e490SVasu Dev /* 1279a703e490SVasu Dev * Don't bother moving the skb's if this context is running 1280a703e490SVasu Dev * on the same CPU that is having its thread destroyed. This 1281a703e490SVasu Dev * can easily happen when the module is removed. 1282a703e490SVasu Dev */ 1283a703e490SVasu Dev if (cpu != targ_cpu) { 1284a703e490SVasu Dev p0 = &per_cpu(fcoe_percpu, targ_cpu); 1285a703e490SVasu Dev spin_lock_bh(&p0->fcoe_rx_list.lock); 1286a703e490SVasu Dev if (p0->thread) { 1287d5488eb9SRobert Love FCOE_DBG("Moving frames from CPU %d to CPU %d\n", 1288a703e490SVasu Dev cpu, targ_cpu); 1289a703e490SVasu Dev 1290a703e490SVasu Dev while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) 1291a703e490SVasu Dev __skb_queue_tail(&p0->fcoe_rx_list, skb); 1292a703e490SVasu Dev spin_unlock_bh(&p0->fcoe_rx_list.lock); 1293a703e490SVasu Dev } else { 1294a703e490SVasu Dev /* 1295a703e490SVasu Dev * The targeted CPU is not initialized and cannot accept 1296a703e490SVasu Dev * new skbs. Unlock the targeted CPU and drop the skbs 1297a703e490SVasu Dev * on the CPU that is going offline. 1298a703e490SVasu Dev */ 1299a703e490SVasu Dev while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) 1300a703e490SVasu Dev kfree_skb(skb); 1301a703e490SVasu Dev spin_unlock_bh(&p0->fcoe_rx_list.lock); 1302a703e490SVasu Dev } 1303a703e490SVasu Dev } else { 1304a703e490SVasu Dev /* 1305a703e490SVasu Dev * This scenario occurs when the module is being removed 1306a703e490SVasu Dev * and all threads are being destroyed. skbs will continue 1307a703e490SVasu Dev * to be shifted from the CPU thread that is being removed 1308a703e490SVasu Dev * to the CPU thread associated with the CPU that is processing 1309a703e490SVasu Dev * the module removal. Once there is only one CPU Rx thread it 1310a703e490SVasu Dev * will reach this case and we will drop all skbs and later 1311a703e490SVasu Dev * stop the thread. 1312a703e490SVasu Dev */ 1313a703e490SVasu Dev spin_lock_bh(&p->fcoe_rx_list.lock); 1314a703e490SVasu Dev while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) 1315a703e490SVasu Dev kfree_skb(skb); 1316a703e490SVasu Dev spin_unlock_bh(&p->fcoe_rx_list.lock); 1317a703e490SVasu Dev } 1318f018b73aSJoe Eykholt put_cpu(); 1319a703e490SVasu Dev #else 1320a703e490SVasu Dev /* 1321dd3fd72eSChris Leech * This a non-SMP scenario where the singular Rx thread is 1322a703e490SVasu Dev * being removed. Free all skbs and stop the thread. 1323a703e490SVasu Dev */ 1324a703e490SVasu Dev spin_lock_bh(&p->fcoe_rx_list.lock); 1325a703e490SVasu Dev while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) 1326a703e490SVasu Dev kfree_skb(skb); 1327a703e490SVasu Dev spin_unlock_bh(&p->fcoe_rx_list.lock); 1328a703e490SVasu Dev #endif 1329a703e490SVasu Dev 1330a703e490SVasu Dev if (thread) 1331a703e490SVasu Dev kthread_stop(thread); 1332a703e490SVasu Dev 1333a703e490SVasu Dev if (crc_eof) 1334a703e490SVasu Dev put_page(crc_eof); 1335a703e490SVasu Dev } 1336a703e490SVasu Dev 1337a703e490SVasu Dev /** 13381875f27eSRobert Love * fcoe_cpu_callback() - Handler for CPU hotplug events 13391875f27eSRobert Love * @nfb: The callback data block 13401875f27eSRobert Love * @action: The event triggering the callback 13411875f27eSRobert Love * @hcpu: The index of the CPU that the event is for 1342a703e490SVasu Dev * 13431875f27eSRobert Love * This creates or destroys per-CPU data for fcoe 1344a703e490SVasu Dev * 1345a703e490SVasu Dev * Returns NOTIFY_OK always. 1346a703e490SVasu Dev */ 1347a703e490SVasu Dev static int fcoe_cpu_callback(struct notifier_block *nfb, 1348a703e490SVasu Dev unsigned long action, void *hcpu) 1349a703e490SVasu Dev { 1350a703e490SVasu Dev unsigned cpu = (unsigned long)hcpu; 1351a703e490SVasu Dev 1352a703e490SVasu Dev switch (action) { 1353a703e490SVasu Dev case CPU_ONLINE: 1354a703e490SVasu Dev case CPU_ONLINE_FROZEN: 1355d5488eb9SRobert Love FCOE_DBG("CPU %x online: Create Rx thread\n", cpu); 1356a703e490SVasu Dev fcoe_percpu_thread_create(cpu); 1357a703e490SVasu Dev break; 1358a703e490SVasu Dev case CPU_DEAD: 1359a703e490SVasu Dev case CPU_DEAD_FROZEN: 1360d5488eb9SRobert Love FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu); 1361a703e490SVasu Dev fcoe_percpu_thread_destroy(cpu); 1362a703e490SVasu Dev break; 1363a703e490SVasu Dev default: 1364a703e490SVasu Dev break; 1365a703e490SVasu Dev } 1366a703e490SVasu Dev return NOTIFY_OK; 1367a703e490SVasu Dev } 1368a703e490SVasu Dev 1369a703e490SVasu Dev /** 1370064287eeSKiran Patil * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming 1371064287eeSKiran Patil * command. 1372064287eeSKiran Patil * 1373d272281cSVasu Dev * This routine selects next CPU based on cpumask to distribute 1374d272281cSVasu Dev * incoming requests in round robin. 1375064287eeSKiran Patil * 1376d272281cSVasu Dev * Returns: int CPU number 1377064287eeSKiran Patil */ 1378d272281cSVasu Dev static inline unsigned int fcoe_select_cpu(void) 1379064287eeSKiran Patil { 1380064287eeSKiran Patil static unsigned int selected_cpu; 1381064287eeSKiran Patil 1382064287eeSKiran Patil selected_cpu = cpumask_next(selected_cpu, cpu_online_mask); 1383064287eeSKiran Patil if (selected_cpu >= nr_cpu_ids) 1384064287eeSKiran Patil selected_cpu = cpumask_first(cpu_online_mask); 1385d272281cSVasu Dev 1386064287eeSKiran Patil return selected_cpu; 1387064287eeSKiran Patil } 1388064287eeSKiran Patil 1389064287eeSKiran Patil /** 13901875f27eSRobert Love * fcoe_rcv() - Receive packets from a net device 13911875f27eSRobert Love * @skb: The received packet 13921875f27eSRobert Love * @netdev: The net device that the packet was received on 13931875f27eSRobert Love * @ptype: The packet type context 13941875f27eSRobert Love * @olddev: The last device net device 1395a703e490SVasu Dev * 13961875f27eSRobert Love * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a 13971875f27eSRobert Love * FC frame and passes the frame to libfc. 1398a703e490SVasu Dev * 1399a703e490SVasu Dev * Returns: 0 for success 1400a703e490SVasu Dev */ 14017c9c6841SBart Van Assche static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, 1402a703e490SVasu Dev struct packet_type *ptype, struct net_device *olddev) 1403a703e490SVasu Dev { 14041875f27eSRobert Love struct fc_lport *lport; 1405a703e490SVasu Dev struct fcoe_rcv_info *fr; 1406259ad85dSChris Leech struct fcoe_interface *fcoe; 1407a703e490SVasu Dev struct fc_frame_header *fh; 1408a703e490SVasu Dev struct fcoe_percpu_s *fps; 1409519e5135SVasu Dev struct ethhdr *eh; 1410b2f0091fSVasu Dev unsigned int cpu; 1411a703e490SVasu Dev 1412259ad85dSChris Leech fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); 14131875f27eSRobert Love lport = fcoe->ctlr.lp; 14141875f27eSRobert Love if (unlikely(!lport)) { 14151875f27eSRobert Love FCOE_NETDEV_DBG(netdev, "Cannot find hba structure"); 1416a703e490SVasu Dev goto err2; 1417a703e490SVasu Dev } 14181875f27eSRobert Love if (!lport->link_up) 141997c8389dSJoe Eykholt goto err2; 1420a703e490SVasu Dev 14211875f27eSRobert Love FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p " 1422d5488eb9SRobert Love "data:%p tail:%p end:%p sum:%d dev:%s", 1423d5488eb9SRobert Love skb->len, skb->data_len, skb->head, skb->data, 1424d5488eb9SRobert Love skb_tail_pointer(skb), skb_end_pointer(skb), 1425d5488eb9SRobert Love skb->csum, skb->dev ? skb->dev->name : "<NULL>"); 1426a703e490SVasu Dev 1427519e5135SVasu Dev eh = eth_hdr(skb); 1428519e5135SVasu Dev 1429519e5135SVasu Dev if (is_fip_mode(&fcoe->ctlr) && 1430519e5135SVasu Dev compare_ether_addr(eh->h_source, fcoe->ctlr.dest_addr)) { 1431519e5135SVasu Dev FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n", 1432519e5135SVasu Dev eh->h_source); 1433a703e490SVasu Dev goto err; 1434a703e490SVasu Dev } 1435a703e490SVasu Dev 1436a703e490SVasu Dev /* 1437a703e490SVasu Dev * Check for minimum frame length, and make sure required FCoE 1438a703e490SVasu Dev * and FC headers are pulled into the linear data area. 1439a703e490SVasu Dev */ 1440a703e490SVasu Dev if (unlikely((skb->len < FCOE_MIN_FRAME) || 1441a703e490SVasu Dev !pskb_may_pull(skb, FCOE_HEADER_LEN))) 1442a703e490SVasu Dev goto err; 1443a703e490SVasu Dev 1444a703e490SVasu Dev skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); 1445a703e490SVasu Dev fh = (struct fc_frame_header *) skb_transport_header(skb); 1446a703e490SVasu Dev 14470ee31cb5SRobert Love if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) { 14480ee31cb5SRobert Love FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n", 14490ee31cb5SRobert Love eh->h_dest); 14500ee31cb5SRobert Love goto err; 14510ee31cb5SRobert Love } 14520ee31cb5SRobert Love 1453a703e490SVasu Dev fr = fcoe_dev_from_skb(skb); 14541875f27eSRobert Love fr->fr_dev = lport; 1455a703e490SVasu Dev 1456a703e490SVasu Dev /* 1457b2f0091fSVasu Dev * In case the incoming frame's exchange is originated from 1458b2f0091fSVasu Dev * the initiator, then received frame's exchange id is ANDed 1459b2f0091fSVasu Dev * with fc_cpu_mask bits to get the same cpu on which exchange 1460d272281cSVasu Dev * was originated, otherwise select cpu using rx exchange id 1461d272281cSVasu Dev * or fcoe_select_cpu(). 1462a703e490SVasu Dev */ 1463b2f0091fSVasu Dev if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) 1464b2f0091fSVasu Dev cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; 1465064287eeSKiran Patil else { 1466d272281cSVasu Dev if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN) 1467d272281cSVasu Dev cpu = fcoe_select_cpu(); 1468d272281cSVasu Dev else 146929bdd2bbSKiran Patil cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask; 1470064287eeSKiran Patil } 1471324f6678SVasu Dev 1472324f6678SVasu Dev if (cpu >= nr_cpu_ids) 1473324f6678SVasu Dev goto err; 1474324f6678SVasu Dev 1475a703e490SVasu Dev fps = &per_cpu(fcoe_percpu, cpu); 1476a703e490SVasu Dev spin_lock_bh(&fps->fcoe_rx_list.lock); 1477a703e490SVasu Dev if (unlikely(!fps->thread)) { 1478a703e490SVasu Dev /* 1479a703e490SVasu Dev * The targeted CPU is not ready, let's target 1480a703e490SVasu Dev * the first CPU now. For non-SMP systems this 1481a703e490SVasu Dev * will check the same CPU twice. 1482a703e490SVasu Dev */ 14831875f27eSRobert Love FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread " 1484d5488eb9SRobert Love "ready for incoming skb- using first online " 1485d5488eb9SRobert Love "CPU.\n"); 1486a703e490SVasu Dev 1487a703e490SVasu Dev spin_unlock_bh(&fps->fcoe_rx_list.lock); 14886957177fSRusty Russell cpu = cpumask_first(cpu_online_mask); 1489a703e490SVasu Dev fps = &per_cpu(fcoe_percpu, cpu); 1490a703e490SVasu Dev spin_lock_bh(&fps->fcoe_rx_list.lock); 1491a703e490SVasu Dev if (!fps->thread) { 1492a703e490SVasu Dev spin_unlock_bh(&fps->fcoe_rx_list.lock); 1493a703e490SVasu Dev goto err; 1494a703e490SVasu Dev } 1495a703e490SVasu Dev } 1496a703e490SVasu Dev 1497a703e490SVasu Dev /* 1498a703e490SVasu Dev * We now have a valid CPU that we're targeting for 1499a703e490SVasu Dev * this skb. We also have this receive thread locked, 1500a703e490SVasu Dev * so we're free to queue skbs into it's queue. 1501a703e490SVasu Dev */ 1502859b7b64SChris Leech 1503859b7b64SChris Leech /* If this is a SCSI-FCP frame, and this is already executing on the 1504859b7b64SChris Leech * correct CPU, and the queue for this CPU is empty, then go ahead 1505859b7b64SChris Leech * and process the frame directly in the softirq context. 1506859b7b64SChris Leech * This lets us process completions without context switching from the 1507859b7b64SChris Leech * NET_RX softirq, to our receive processing thread, and then back to 1508859b7b64SChris Leech * BLOCK softirq context. 1509859b7b64SChris Leech */ 1510859b7b64SChris Leech if (fh->fh_type == FC_TYPE_FCP && 1511859b7b64SChris Leech cpu == smp_processor_id() && 1512859b7b64SChris Leech skb_queue_empty(&fps->fcoe_rx_list)) { 1513859b7b64SChris Leech spin_unlock_bh(&fps->fcoe_rx_list.lock); 1514859b7b64SChris Leech fcoe_recv_frame(skb); 1515859b7b64SChris Leech } else { 1516a703e490SVasu Dev __skb_queue_tail(&fps->fcoe_rx_list, skb); 1517a703e490SVasu Dev if (fps->fcoe_rx_list.qlen == 1) 1518a703e490SVasu Dev wake_up_process(fps->thread); 1519a703e490SVasu Dev spin_unlock_bh(&fps->fcoe_rx_list.lock); 1520859b7b64SChris Leech } 1521a703e490SVasu Dev 1522a703e490SVasu Dev return 0; 1523a703e490SVasu Dev err: 1524f018b73aSJoe Eykholt per_cpu_ptr(lport->dev_stats, get_cpu())->ErrorFrames++; 1525f018b73aSJoe Eykholt put_cpu(); 1526a703e490SVasu Dev err2: 1527a703e490SVasu Dev kfree_skb(skb); 1528a703e490SVasu Dev return -1; 1529a703e490SVasu Dev } 1530a703e490SVasu Dev 1531a703e490SVasu Dev /** 15328597ae8bSBhanu Prakash Gollapudi * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC 15331875f27eSRobert Love * @skb: The packet to be transmitted 15341875f27eSRobert Love * @tlen: The total length of the trailer 15351875f27eSRobert Love * 1536a703e490SVasu Dev * Returns: 0 for success 1537a703e490SVasu Dev */ 15388597ae8bSBhanu Prakash Gollapudi static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen) 1539a703e490SVasu Dev { 1540a703e490SVasu Dev struct fcoe_percpu_s *fps; 15418597ae8bSBhanu Prakash Gollapudi int rc; 1542a703e490SVasu Dev 1543a703e490SVasu Dev fps = &get_cpu_var(fcoe_percpu); 15448597ae8bSBhanu Prakash Gollapudi rc = fcoe_get_paged_crc_eof(skb, tlen, fps); 1545a703e490SVasu Dev put_cpu_var(fcoe_percpu); 1546a703e490SVasu Dev 15478597ae8bSBhanu Prakash Gollapudi return rc; 1548a703e490SVasu Dev } 1549a703e490SVasu Dev 1550a703e490SVasu Dev /** 15511875f27eSRobert Love * fcoe_xmit() - Transmit a FCoE frame 15521875f27eSRobert Love * @lport: The local port that the frame is to be transmitted for 15531875f27eSRobert Love * @fp: The frame to be transmitted 1554a703e490SVasu Dev * 1555a703e490SVasu Dev * Return: 0 for success 1556a703e490SVasu Dev */ 15577c9c6841SBart Van Assche static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) 1558a703e490SVasu Dev { 15594bb6b515SVasu Dev int wlen; 1560a703e490SVasu Dev u32 crc; 1561a703e490SVasu Dev struct ethhdr *eh; 1562a703e490SVasu Dev struct fcoe_crc_eof *cp; 1563a703e490SVasu Dev struct sk_buff *skb; 1564a703e490SVasu Dev struct fcoe_dev_stats *stats; 1565a703e490SVasu Dev struct fc_frame_header *fh; 1566a703e490SVasu Dev unsigned int hlen; /* header length implies the version */ 1567a703e490SVasu Dev unsigned int tlen; /* trailer length */ 1568a703e490SVasu Dev unsigned int elen; /* eth header, may include vlan */ 15691875f27eSRobert Love struct fcoe_port *port = lport_priv(lport); 15708597ae8bSBhanu Prakash Gollapudi struct fcoe_interface *fcoe = port->priv; 1571a703e490SVasu Dev u8 sof, eof; 1572a703e490SVasu Dev struct fcoe_hdr *hp; 1573a703e490SVasu Dev 1574a703e490SVasu Dev WARN_ON((fr_len(fp) % sizeof(u32)) != 0); 1575a703e490SVasu Dev 1576a703e490SVasu Dev fh = fc_frame_header_get(fp); 157797c8389dSJoe Eykholt skb = fp_skb(fp); 157897c8389dSJoe Eykholt wlen = skb->len / FCOE_WORD_TO_BYTE; 157997c8389dSJoe Eykholt 15801875f27eSRobert Love if (!lport->link_up) { 15813caf02eeSDan Carpenter kfree_skb(skb); 158297c8389dSJoe Eykholt return 0; 1583a703e490SVasu Dev } 1584a703e490SVasu Dev 15859860eeb4SJoe Eykholt if (unlikely(fh->fh_type == FC_TYPE_ELS) && 15861875f27eSRobert Love fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb)) 158797c8389dSJoe Eykholt return 0; 158897c8389dSJoe Eykholt 1589a703e490SVasu Dev sof = fr_sof(fp); 1590a703e490SVasu Dev eof = fr_eof(fp); 1591a703e490SVasu Dev 15924e57e1cbSVasu Dev elen = sizeof(struct ethhdr); 1593a703e490SVasu Dev hlen = sizeof(struct fcoe_hdr); 1594a703e490SVasu Dev tlen = sizeof(struct fcoe_crc_eof); 1595a703e490SVasu Dev wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; 1596a703e490SVasu Dev 1597a703e490SVasu Dev /* crc offload */ 15981875f27eSRobert Love if (likely(lport->crc_offload)) { 1599a703e490SVasu Dev skb->ip_summed = CHECKSUM_PARTIAL; 1600a703e490SVasu Dev skb->csum_start = skb_headroom(skb); 1601a703e490SVasu Dev skb->csum_offset = skb->len; 1602a703e490SVasu Dev crc = 0; 1603a703e490SVasu Dev } else { 1604a703e490SVasu Dev skb->ip_summed = CHECKSUM_NONE; 1605a703e490SVasu Dev crc = fcoe_fc_crc(fp); 1606a703e490SVasu Dev } 1607a703e490SVasu Dev 1608014f5c3fSChris Leech /* copy port crc and eof to the skb buff */ 1609a703e490SVasu Dev if (skb_is_nonlinear(skb)) { 1610a703e490SVasu Dev skb_frag_t *frag; 16118597ae8bSBhanu Prakash Gollapudi if (fcoe_alloc_paged_crc_eof(skb, tlen)) { 1612a703e490SVasu Dev kfree_skb(skb); 1613a703e490SVasu Dev return -ENOMEM; 1614a703e490SVasu Dev } 1615a703e490SVasu Dev frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; 1616165c68d5SIan Campbell cp = kmap_atomic(skb_frag_page(frag), KM_SKB_DATA_SOFTIRQ) 1617a703e490SVasu Dev + frag->page_offset; 1618a703e490SVasu Dev } else { 1619a703e490SVasu Dev cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); 1620a703e490SVasu Dev } 1621a703e490SVasu Dev 1622a703e490SVasu Dev memset(cp, 0, sizeof(*cp)); 1623a703e490SVasu Dev cp->fcoe_eof = eof; 1624a703e490SVasu Dev cp->fcoe_crc32 = cpu_to_le32(~crc); 1625a703e490SVasu Dev 1626a703e490SVasu Dev if (skb_is_nonlinear(skb)) { 1627a703e490SVasu Dev kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ); 1628a703e490SVasu Dev cp = NULL; 1629a703e490SVasu Dev } 1630a703e490SVasu Dev 1631014f5c3fSChris Leech /* adjust skb network/transport offsets to match mac/fcoe/port */ 1632a703e490SVasu Dev skb_push(skb, elen + hlen); 1633a703e490SVasu Dev skb_reset_mac_header(skb); 1634a703e490SVasu Dev skb_reset_network_header(skb); 1635a703e490SVasu Dev skb->mac_len = elen; 1636a703e490SVasu Dev skb->protocol = htons(ETH_P_FCOE); 16376f6c2aa3Sjohn fastabend skb->priority = port->priority; 16386f6c2aa3Sjohn fastabend 1639d1483bb9SVasu Dev if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN && 1640d1483bb9SVasu Dev fcoe->realdev->features & NETIF_F_HW_VLAN_TX) { 1641d1483bb9SVasu Dev skb->vlan_tci = VLAN_TAG_PRESENT | 1642d1483bb9SVasu Dev vlan_dev_vlan_id(fcoe->netdev); 1643d1483bb9SVasu Dev skb->dev = fcoe->realdev; 1644d1483bb9SVasu Dev } else 16453fe9a0baSChris Leech skb->dev = fcoe->netdev; 1646a703e490SVasu Dev 1647a703e490SVasu Dev /* fill up mac and fcoe headers */ 1648a703e490SVasu Dev eh = eth_hdr(skb); 1649a703e490SVasu Dev eh->h_proto = htons(ETH_P_FCOE); 16503fe9a0baSChris Leech memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN); 1651cd229e42SJoe Eykholt if (fcoe->ctlr.map_dest) 1652cd229e42SJoe Eykholt memcpy(eh->h_dest + 3, fh->fh_d_id, 3); 1653a703e490SVasu Dev 16543fe9a0baSChris Leech if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN)) 16553fe9a0baSChris Leech memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN); 1656a703e490SVasu Dev else 165711b56188SChris Leech memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); 1658a703e490SVasu Dev 1659a703e490SVasu Dev hp = (struct fcoe_hdr *)(eh + 1); 1660a703e490SVasu Dev memset(hp, 0, sizeof(*hp)); 1661a703e490SVasu Dev if (FC_FCOE_VER) 1662a703e490SVasu Dev FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); 1663a703e490SVasu Dev hp->fcoe_sof = sof; 1664a703e490SVasu Dev 1665a703e490SVasu Dev /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ 16661875f27eSRobert Love if (lport->seq_offload && fr_max_payload(fp)) { 1667a703e490SVasu Dev skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; 1668a703e490SVasu Dev skb_shinfo(skb)->gso_size = fr_max_payload(fp); 1669a703e490SVasu Dev } else { 1670a703e490SVasu Dev skb_shinfo(skb)->gso_type = 0; 1671a703e490SVasu Dev skb_shinfo(skb)->gso_size = 0; 1672a703e490SVasu Dev } 1673a703e490SVasu Dev /* update tx stats: regardless if LLD fails */ 1674f018b73aSJoe Eykholt stats = per_cpu_ptr(lport->dev_stats, get_cpu()); 1675a703e490SVasu Dev stats->TxFrames++; 1676a703e490SVasu Dev stats->TxWords += wlen; 1677f018b73aSJoe Eykholt put_cpu(); 1678a703e490SVasu Dev 1679a703e490SVasu Dev /* send down to lld */ 16801875f27eSRobert Love fr_dev(fp) = lport; 1681980f5156SVasu Dev fcoe_port_send(port, skb); 1682a703e490SVasu Dev return 0; 1683a703e490SVasu Dev } 1684a703e490SVasu Dev 1685a703e490SVasu Dev /** 16861875f27eSRobert Love * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion 16871875f27eSRobert Love * @skb: The completed skb (argument required by destructor) 1688e7a51997SJoe Eykholt */ 1689e7a51997SJoe Eykholt static void fcoe_percpu_flush_done(struct sk_buff *skb) 1690e7a51997SJoe Eykholt { 1691e7a51997SJoe Eykholt complete(&fcoe_flush_completion); 1692e7a51997SJoe Eykholt } 1693e7a51997SJoe Eykholt 1694e7a51997SJoe Eykholt /** 169552ee8321SVasu Dev * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC 169652ee8321SVasu Dev * @lport: The local port the frame was received on 169752ee8321SVasu Dev * @fp: The received frame 169852ee8321SVasu Dev * 169952ee8321SVasu Dev * Return: 0 on passing filtering checks 170052ee8321SVasu Dev */ 170152ee8321SVasu Dev static inline int fcoe_filter_frames(struct fc_lport *lport, 170252ee8321SVasu Dev struct fc_frame *fp) 170352ee8321SVasu Dev { 170452ee8321SVasu Dev struct fcoe_interface *fcoe; 170552ee8321SVasu Dev struct fc_frame_header *fh; 170652ee8321SVasu Dev struct sk_buff *skb = (struct sk_buff *)fp; 170752ee8321SVasu Dev struct fcoe_dev_stats *stats; 170852ee8321SVasu Dev 170952ee8321SVasu Dev /* 171052ee8321SVasu Dev * We only check CRC if no offload is available and if it is 171152ee8321SVasu Dev * it's solicited data, in which case, the FCP layer would 171252ee8321SVasu Dev * check it during the copy. 171352ee8321SVasu Dev */ 171452ee8321SVasu Dev if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY) 171552ee8321SVasu Dev fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 171652ee8321SVasu Dev else 171752ee8321SVasu Dev fr_flags(fp) |= FCPHF_CRC_UNCHECKED; 171852ee8321SVasu Dev 171952ee8321SVasu Dev fh = (struct fc_frame_header *) skb_transport_header(skb); 172052ee8321SVasu Dev fh = fc_frame_header_get(fp); 172152ee8321SVasu Dev if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP) 172252ee8321SVasu Dev return 0; 172352ee8321SVasu Dev 17248597ae8bSBhanu Prakash Gollapudi fcoe = ((struct fcoe_port *)lport_priv(lport))->priv; 172552ee8321SVasu Dev if (is_fip_mode(&fcoe->ctlr) && fc_frame_payload_op(fp) == ELS_LOGO && 172652ee8321SVasu Dev ntoh24(fh->fh_s_id) == FC_FID_FLOGI) { 172752ee8321SVasu Dev FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n"); 172852ee8321SVasu Dev return -EINVAL; 172952ee8321SVasu Dev } 173052ee8321SVasu Dev 1731f2f96d20SDan Carpenter if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) || 173252ee8321SVasu Dev le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) { 173352ee8321SVasu Dev fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 173452ee8321SVasu Dev return 0; 173552ee8321SVasu Dev } 173652ee8321SVasu Dev 173752ee8321SVasu Dev stats = per_cpu_ptr(lport->dev_stats, get_cpu()); 173852ee8321SVasu Dev stats->InvalidCRCCount++; 173952ee8321SVasu Dev if (stats->InvalidCRCCount < 5) 174052ee8321SVasu Dev printk(KERN_WARNING "fcoe: dropping frame with CRC error\n"); 17417e1e7eadSThomas Gleixner put_cpu(); 174252ee8321SVasu Dev return -EINVAL; 174352ee8321SVasu Dev } 174452ee8321SVasu Dev 174552ee8321SVasu Dev /** 1746859b7b64SChris Leech * fcoe_recv_frame() - process a single received frame 1747859b7b64SChris Leech * @skb: frame to process 1748a703e490SVasu Dev */ 1749859b7b64SChris Leech static void fcoe_recv_frame(struct sk_buff *skb) 1750a703e490SVasu Dev { 1751a703e490SVasu Dev u32 fr_len; 17521875f27eSRobert Love struct fc_lport *lport; 1753a703e490SVasu Dev struct fcoe_rcv_info *fr; 1754a703e490SVasu Dev struct fcoe_dev_stats *stats; 1755a703e490SVasu Dev struct fcoe_crc_eof crc_eof; 1756a703e490SVasu Dev struct fc_frame *fp; 1757014f5c3fSChris Leech struct fcoe_port *port; 1758a703e490SVasu Dev struct fcoe_hdr *hp; 1759a703e490SVasu Dev 1760a703e490SVasu Dev fr = fcoe_dev_from_skb(skb); 17611875f27eSRobert Love lport = fr->fr_dev; 17621875f27eSRobert Love if (unlikely(!lport)) { 1763e7a51997SJoe Eykholt if (skb->destructor != fcoe_percpu_flush_done) 1764e7a51997SJoe Eykholt FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb"); 1765a703e490SVasu Dev kfree_skb(skb); 1766859b7b64SChris Leech return; 1767a703e490SVasu Dev } 1768a703e490SVasu Dev 1769d5488eb9SRobert Love FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d " 1770d5488eb9SRobert Love "head:%p data:%p tail:%p end:%p sum:%d dev:%s", 1771a703e490SVasu Dev skb->len, skb->data_len, 1772a703e490SVasu Dev skb->head, skb->data, skb_tail_pointer(skb), 1773a703e490SVasu Dev skb_end_pointer(skb), skb->csum, 1774a703e490SVasu Dev skb->dev ? skb->dev->name : "<NULL>"); 1775a703e490SVasu Dev 17761875f27eSRobert Love port = lport_priv(lport); 1777f1633011SRobert Love skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */ 1778a703e490SVasu Dev 1779a703e490SVasu Dev /* 1780a703e490SVasu Dev * Frame length checks and setting up the header pointers 1781a703e490SVasu Dev * was done in fcoe_rcv already. 1782a703e490SVasu Dev */ 1783a703e490SVasu Dev hp = (struct fcoe_hdr *) skb_network_header(skb); 1784a703e490SVasu Dev 1785f018b73aSJoe Eykholt stats = per_cpu_ptr(lport->dev_stats, get_cpu()); 1786a703e490SVasu Dev if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { 1787a703e490SVasu Dev if (stats->ErrorFrames < 5) 1788d5488eb9SRobert Love printk(KERN_WARNING "fcoe: FCoE version " 1789a703e490SVasu Dev "mismatch: The frame has " 1790a703e490SVasu Dev "version %x, but the " 1791a703e490SVasu Dev "initiator supports version " 1792a703e490SVasu Dev "%x\n", FC_FCOE_DECAPS_VER(hp), 1793a703e490SVasu Dev FC_FCOE_VER); 1794f018b73aSJoe Eykholt goto drop; 1795a703e490SVasu Dev } 1796a703e490SVasu Dev 1797a703e490SVasu Dev skb_pull(skb, sizeof(struct fcoe_hdr)); 1798a703e490SVasu Dev fr_len = skb->len - sizeof(struct fcoe_crc_eof); 1799a703e490SVasu Dev 1800a703e490SVasu Dev stats->RxFrames++; 1801a703e490SVasu Dev stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; 1802a703e490SVasu Dev 1803a703e490SVasu Dev fp = (struct fc_frame *)skb; 1804a703e490SVasu Dev fc_frame_init(fp); 18051875f27eSRobert Love fr_dev(fp) = lport; 1806a703e490SVasu Dev fr_sof(fp) = hp->fcoe_sof; 1807a703e490SVasu Dev 1808a703e490SVasu Dev /* Copy out the CRC and EOF trailer for access */ 1809f018b73aSJoe Eykholt if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) 1810f018b73aSJoe Eykholt goto drop; 1811a703e490SVasu Dev fr_eof(fp) = crc_eof.fcoe_eof; 1812a703e490SVasu Dev fr_crc(fp) = crc_eof.fcoe_crc32; 1813f018b73aSJoe Eykholt if (pskb_trim(skb, fr_len)) 1814f018b73aSJoe Eykholt goto drop; 1815a703e490SVasu Dev 181652ee8321SVasu Dev if (!fcoe_filter_frames(lport, fp)) { 1817f018b73aSJoe Eykholt put_cpu(); 18181875f27eSRobert Love fc_exch_recv(lport, fp); 1819f018b73aSJoe Eykholt return; 182052ee8321SVasu Dev } 1821f018b73aSJoe Eykholt drop: 1822f018b73aSJoe Eykholt stats->ErrorFrames++; 1823f018b73aSJoe Eykholt put_cpu(); 1824f018b73aSJoe Eykholt kfree_skb(skb); 1825a703e490SVasu Dev } 1826859b7b64SChris Leech 1827859b7b64SChris Leech /** 1828859b7b64SChris Leech * fcoe_percpu_receive_thread() - The per-CPU packet receive thread 1829859b7b64SChris Leech * @arg: The per-CPU context 1830859b7b64SChris Leech * 1831859b7b64SChris Leech * Return: 0 for success 1832859b7b64SChris Leech */ 18337c9c6841SBart Van Assche static int fcoe_percpu_receive_thread(void *arg) 1834859b7b64SChris Leech { 1835859b7b64SChris Leech struct fcoe_percpu_s *p = arg; 1836859b7b64SChris Leech struct sk_buff *skb; 1837859b7b64SChris Leech 1838859b7b64SChris Leech set_user_nice(current, -20); 1839859b7b64SChris Leech 1840859b7b64SChris Leech while (!kthread_should_stop()) { 1841859b7b64SChris Leech 1842859b7b64SChris Leech spin_lock_bh(&p->fcoe_rx_list.lock); 1843859b7b64SChris Leech while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) { 1844859b7b64SChris Leech set_current_state(TASK_INTERRUPTIBLE); 1845859b7b64SChris Leech spin_unlock_bh(&p->fcoe_rx_list.lock); 1846859b7b64SChris Leech schedule(); 1847859b7b64SChris Leech set_current_state(TASK_RUNNING); 1848859b7b64SChris Leech if (kthread_should_stop()) 1849859b7b64SChris Leech return 0; 1850859b7b64SChris Leech spin_lock_bh(&p->fcoe_rx_list.lock); 1851859b7b64SChris Leech } 1852859b7b64SChris Leech spin_unlock_bh(&p->fcoe_rx_list.lock); 1853859b7b64SChris Leech fcoe_recv_frame(skb); 1854859b7b64SChris Leech } 1855a703e490SVasu Dev return 0; 1856a703e490SVasu Dev } 1857a703e490SVasu Dev 1858a703e490SVasu Dev /** 18591875f27eSRobert Love * fcoe_dev_setup() - Setup the link change notification interface 1860a703e490SVasu Dev */ 1861b0d428adSRandy Dunlap static void fcoe_dev_setup(void) 1862a703e490SVasu Dev { 18636f6c2aa3Sjohn fastabend register_dcbevent_notifier(&dcb_notifier); 1864a703e490SVasu Dev register_netdevice_notifier(&fcoe_notifier); 1865a703e490SVasu Dev } 1866a703e490SVasu Dev 1867a703e490SVasu Dev /** 18681875f27eSRobert Love * fcoe_dev_cleanup() - Cleanup the link change notification interface 1869a703e490SVasu Dev */ 1870a703e490SVasu Dev static void fcoe_dev_cleanup(void) 1871a703e490SVasu Dev { 18726f6c2aa3Sjohn fastabend unregister_dcbevent_notifier(&dcb_notifier); 1873a703e490SVasu Dev unregister_netdevice_notifier(&fcoe_notifier); 1874a703e490SVasu Dev } 1875a703e490SVasu Dev 18766f6c2aa3Sjohn fastabend static struct fcoe_interface * 18776f6c2aa3Sjohn fastabend fcoe_hostlist_lookup_realdev_port(struct net_device *netdev) 18786f6c2aa3Sjohn fastabend { 18796f6c2aa3Sjohn fastabend struct fcoe_interface *fcoe; 18806f6c2aa3Sjohn fastabend struct net_device *real_dev; 18816f6c2aa3Sjohn fastabend 18826f6c2aa3Sjohn fastabend list_for_each_entry(fcoe, &fcoe_hostlist, list) { 18836f6c2aa3Sjohn fastabend if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) 18846f6c2aa3Sjohn fastabend real_dev = vlan_dev_real_dev(fcoe->netdev); 18856f6c2aa3Sjohn fastabend else 18866f6c2aa3Sjohn fastabend real_dev = fcoe->netdev; 18876f6c2aa3Sjohn fastabend 18886f6c2aa3Sjohn fastabend if (netdev == real_dev) 18896f6c2aa3Sjohn fastabend return fcoe; 18906f6c2aa3Sjohn fastabend } 18916f6c2aa3Sjohn fastabend return NULL; 18926f6c2aa3Sjohn fastabend } 18936f6c2aa3Sjohn fastabend 18946f6c2aa3Sjohn fastabend static int fcoe_dcb_app_notification(struct notifier_block *notifier, 18956f6c2aa3Sjohn fastabend ulong event, void *ptr) 18966f6c2aa3Sjohn fastabend { 18976f6c2aa3Sjohn fastabend struct dcb_app_type *entry = ptr; 18986f6c2aa3Sjohn fastabend struct fcoe_interface *fcoe; 18996f6c2aa3Sjohn fastabend struct net_device *netdev; 19006f6c2aa3Sjohn fastabend struct fcoe_port *port; 19016f6c2aa3Sjohn fastabend int prio; 19026f6c2aa3Sjohn fastabend 19036f6c2aa3Sjohn fastabend if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE) 19046f6c2aa3Sjohn fastabend return NOTIFY_OK; 19056f6c2aa3Sjohn fastabend 19066f6c2aa3Sjohn fastabend netdev = dev_get_by_index(&init_net, entry->ifindex); 19076f6c2aa3Sjohn fastabend if (!netdev) 19086f6c2aa3Sjohn fastabend return NOTIFY_OK; 19096f6c2aa3Sjohn fastabend 19106f6c2aa3Sjohn fastabend fcoe = fcoe_hostlist_lookup_realdev_port(netdev); 19116f6c2aa3Sjohn fastabend dev_put(netdev); 19126f6c2aa3Sjohn fastabend if (!fcoe) 19136f6c2aa3Sjohn fastabend return NOTIFY_OK; 19146f6c2aa3Sjohn fastabend 19156f6c2aa3Sjohn fastabend if (entry->dcbx & DCB_CAP_DCBX_VER_CEE) 19166f6c2aa3Sjohn fastabend prio = ffs(entry->app.priority) - 1; 19176f6c2aa3Sjohn fastabend else 19186f6c2aa3Sjohn fastabend prio = entry->app.priority; 19196f6c2aa3Sjohn fastabend 19206f6c2aa3Sjohn fastabend if (prio < 0) 19216f6c2aa3Sjohn fastabend return NOTIFY_OK; 19226f6c2aa3Sjohn fastabend 19236f6c2aa3Sjohn fastabend if (entry->app.protocol == ETH_P_FIP || 19246f6c2aa3Sjohn fastabend entry->app.protocol == ETH_P_FCOE) 19256f6c2aa3Sjohn fastabend fcoe->ctlr.priority = prio; 19266f6c2aa3Sjohn fastabend 19276f6c2aa3Sjohn fastabend if (entry->app.protocol == ETH_P_FCOE) { 19286f6c2aa3Sjohn fastabend port = lport_priv(fcoe->ctlr.lp); 19296f6c2aa3Sjohn fastabend port->priority = prio; 19306f6c2aa3Sjohn fastabend } 19316f6c2aa3Sjohn fastabend 19326f6c2aa3Sjohn fastabend return NOTIFY_OK; 19336f6c2aa3Sjohn fastabend } 19346f6c2aa3Sjohn fastabend 1935a703e490SVasu Dev /** 19361875f27eSRobert Love * fcoe_device_notification() - Handler for net device events 19371875f27eSRobert Love * @notifier: The context of the notification 19381875f27eSRobert Love * @event: The type of event 19391875f27eSRobert Love * @ptr: The net device that the event was on 1940a703e490SVasu Dev * 19411875f27eSRobert Love * This function is called by the Ethernet driver in case of link change event. 1942a703e490SVasu Dev * 1943a703e490SVasu Dev * Returns: 0 for success 1944a703e490SVasu Dev */ 1945a703e490SVasu Dev static int fcoe_device_notification(struct notifier_block *notifier, 1946a703e490SVasu Dev ulong event, void *ptr) 1947a703e490SVasu Dev { 19481875f27eSRobert Love struct fc_lport *lport = NULL; 19491d1b88dcSVasu Dev struct net_device *netdev = ptr; 1950014f5c3fSChris Leech struct fcoe_interface *fcoe; 19512e70e241SChris Leech struct fcoe_port *port; 1952a703e490SVasu Dev struct fcoe_dev_stats *stats; 195397c8389dSJoe Eykholt u32 link_possible = 1; 1954a703e490SVasu Dev u32 mfs; 1955a703e490SVasu Dev int rc = NOTIFY_OK; 1956a703e490SVasu Dev 1957014f5c3fSChris Leech list_for_each_entry(fcoe, &fcoe_hostlist, list) { 195825024989SChris Leech if (fcoe->netdev == netdev) { 19591875f27eSRobert Love lport = fcoe->ctlr.lp; 1960a703e490SVasu Dev break; 1961a703e490SVasu Dev } 1962a703e490SVasu Dev } 19631875f27eSRobert Love if (!lport) { 1964a703e490SVasu Dev rc = NOTIFY_DONE; 1965a703e490SVasu Dev goto out; 1966a703e490SVasu Dev } 1967a703e490SVasu Dev 1968a703e490SVasu Dev switch (event) { 1969a703e490SVasu Dev case NETDEV_DOWN: 1970a703e490SVasu Dev case NETDEV_GOING_DOWN: 197197c8389dSJoe Eykholt link_possible = 0; 1972a703e490SVasu Dev break; 1973a703e490SVasu Dev case NETDEV_UP: 1974a703e490SVasu Dev case NETDEV_CHANGE: 1975a703e490SVasu Dev break; 1976a703e490SVasu Dev case NETDEV_CHANGEMTU: 19777221d7e5SYi Zou if (netdev->features & NETIF_F_FCOE_MTU) 19787221d7e5SYi Zou break; 19791d1b88dcSVasu Dev mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + 1980a703e490SVasu Dev sizeof(struct fcoe_crc_eof)); 1981a703e490SVasu Dev if (mfs >= FC_MIN_MAX_FRAME) 19821875f27eSRobert Love fc_set_mfs(lport, mfs); 1983a703e490SVasu Dev break; 1984a703e490SVasu Dev case NETDEV_REGISTER: 1985a703e490SVasu Dev break; 19862e70e241SChris Leech case NETDEV_UNREGISTER: 19872e70e241SChris Leech list_del(&fcoe->list); 19882e70e241SChris Leech port = lport_priv(fcoe->ctlr.lp); 19892ca32b48STejun Heo queue_work(fcoe_wq, &port->destroy_work); 19902e70e241SChris Leech goto out; 19912e70e241SChris Leech break; 199254a5b21dSYi Zou case NETDEV_FEAT_CHANGE: 199354a5b21dSYi Zou fcoe_netdev_features_change(lport, netdev); 199454a5b21dSYi Zou break; 1995a703e490SVasu Dev default: 19961d1b88dcSVasu Dev FCOE_NETDEV_DBG(netdev, "Unknown event %ld " 1997d5488eb9SRobert Love "from netdev netlink\n", event); 1998a703e490SVasu Dev } 19995e4f8fe7SRobert Love 20005e4f8fe7SRobert Love fcoe_link_speed_update(lport); 20015e4f8fe7SRobert Love 20021875f27eSRobert Love if (link_possible && !fcoe_link_ok(lport)) 20033fe9a0baSChris Leech fcoe_ctlr_link_up(&fcoe->ctlr); 20043fe9a0baSChris Leech else if (fcoe_ctlr_link_down(&fcoe->ctlr)) { 2005f018b73aSJoe Eykholt stats = per_cpu_ptr(lport->dev_stats, get_cpu()); 2006a703e490SVasu Dev stats->LinkFailureCount++; 2007f018b73aSJoe Eykholt put_cpu(); 20081875f27eSRobert Love fcoe_clean_pending_queue(lport); 2009a703e490SVasu Dev } 2010a703e490SVasu Dev out: 2011a703e490SVasu Dev return rc; 2012a703e490SVasu Dev } 2013a703e490SVasu Dev 2014a703e490SVasu Dev /** 201555a66d3cSVasu Dev * fcoe_disable() - Disables a FCoE interface 201678a58246SYi Zou * @netdev : The net_device object the Ethernet interface to create on 201755a66d3cSVasu Dev * 201878a58246SYi Zou * Called from fcoe transport. 201955a66d3cSVasu Dev * 202055a66d3cSVasu Dev * Returns: 0 for success 202155a66d3cSVasu Dev */ 202278a58246SYi Zou static int fcoe_disable(struct net_device *netdev) 202355a66d3cSVasu Dev { 202455a66d3cSVasu Dev struct fcoe_interface *fcoe; 202555a66d3cSVasu Dev int rc = 0; 202655a66d3cSVasu Dev 202755a66d3cSVasu Dev mutex_lock(&fcoe_config_mutex); 202855a66d3cSVasu Dev 2029ee5df628SRobert Love rtnl_lock(); 203055a66d3cSVasu Dev fcoe = fcoe_hostlist_lookup_port(netdev); 203155a66d3cSVasu Dev rtnl_unlock(); 203255a66d3cSVasu Dev 20339ee50e48SChris Leech if (fcoe) { 20349ee50e48SChris Leech fcoe_ctlr_link_down(&fcoe->ctlr); 20359d4cbc05SVasu Dev fcoe_clean_pending_queue(fcoe->ctlr.lp); 20369ee50e48SChris Leech } else 203755a66d3cSVasu Dev rc = -ENODEV; 203855a66d3cSVasu Dev 203955a66d3cSVasu Dev mutex_unlock(&fcoe_config_mutex); 204055a66d3cSVasu Dev return rc; 204155a66d3cSVasu Dev } 204255a66d3cSVasu Dev 204355a66d3cSVasu Dev /** 204455a66d3cSVasu Dev * fcoe_enable() - Enables a FCoE interface 204578a58246SYi Zou * @netdev : The net_device object the Ethernet interface to create on 204655a66d3cSVasu Dev * 204778a58246SYi Zou * Called from fcoe transport. 204855a66d3cSVasu Dev * 204955a66d3cSVasu Dev * Returns: 0 for success 205055a66d3cSVasu Dev */ 205178a58246SYi Zou static int fcoe_enable(struct net_device *netdev) 205255a66d3cSVasu Dev { 205355a66d3cSVasu Dev struct fcoe_interface *fcoe; 205455a66d3cSVasu Dev int rc = 0; 205555a66d3cSVasu Dev 205655a66d3cSVasu Dev mutex_lock(&fcoe_config_mutex); 2057ee5df628SRobert Love rtnl_lock(); 205855a66d3cSVasu Dev fcoe = fcoe_hostlist_lookup_port(netdev); 205955a66d3cSVasu Dev rtnl_unlock(); 206055a66d3cSVasu Dev 20619d4cbc05SVasu Dev if (!fcoe) 206255a66d3cSVasu Dev rc = -ENODEV; 20639d4cbc05SVasu Dev else if (!fcoe_link_ok(fcoe->ctlr.lp)) 20649d4cbc05SVasu Dev fcoe_ctlr_link_up(&fcoe->ctlr); 206555a66d3cSVasu Dev 206655a66d3cSVasu Dev mutex_unlock(&fcoe_config_mutex); 206755a66d3cSVasu Dev return rc; 206855a66d3cSVasu Dev } 206955a66d3cSVasu Dev 207055a66d3cSVasu Dev /** 20711875f27eSRobert Love * fcoe_destroy() - Destroy a FCoE interface 207278a58246SYi Zou * @netdev : The net_device object the Ethernet interface to create on 20731875f27eSRobert Love * 207478a58246SYi Zou * Called from fcoe transport 2075a703e490SVasu Dev * 2076a703e490SVasu Dev * Returns: 0 for success 2077a703e490SVasu Dev */ 207878a58246SYi Zou static int fcoe_destroy(struct net_device *netdev) 2079a703e490SVasu Dev { 2080030f4e00SChris Leech struct fcoe_interface *fcoe; 2081f04ca1b6SVasu Dev struct fc_lport *lport; 2082b2085a4eSNeerav Parikh struct fcoe_port *port; 20838eca355fSMike Christie int rc = 0; 2084a703e490SVasu Dev 2085dfc1d0feSChris Leech mutex_lock(&fcoe_config_mutex); 2086ee5df628SRobert Love rtnl_lock(); 20872e70e241SChris Leech fcoe = fcoe_hostlist_lookup_port(netdev); 20882e70e241SChris Leech if (!fcoe) { 2089a703e490SVasu Dev rc = -ENODEV; 209078a58246SYi Zou goto out_nodev; 2091a703e490SVasu Dev } 2092f04ca1b6SVasu Dev lport = fcoe->ctlr.lp; 2093b2085a4eSNeerav Parikh port = lport_priv(lport); 209454a5b21dSYi Zou list_del(&fcoe->list); 2095b2085a4eSNeerav Parikh queue_work(fcoe_wq, &port->destroy_work); 2096a703e490SVasu Dev out_nodev: 2097b2085a4eSNeerav Parikh rtnl_unlock(); 2098dfc1d0feSChris Leech mutex_unlock(&fcoe_config_mutex); 2099a703e490SVasu Dev return rc; 2100a703e490SVasu Dev } 2101a703e490SVasu Dev 21021875f27eSRobert Love /** 21031875f27eSRobert Love * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context 21041875f27eSRobert Love * @work: Handle to the FCoE port to be destroyed 21051875f27eSRobert Love */ 21062e70e241SChris Leech static void fcoe_destroy_work(struct work_struct *work) 21072e70e241SChris Leech { 21082e70e241SChris Leech struct fcoe_port *port; 2109b2085a4eSNeerav Parikh struct fcoe_interface *fcoe; 21102e70e241SChris Leech 21112e70e241SChris Leech port = container_of(work, struct fcoe_port, destroy_work); 21122e70e241SChris Leech mutex_lock(&fcoe_config_mutex); 2113b2085a4eSNeerav Parikh 2114b2085a4eSNeerav Parikh fcoe = port->priv; 21152e70e241SChris Leech fcoe_if_destroy(port->lport); 2116b2085a4eSNeerav Parikh 2117b2085a4eSNeerav Parikh fcoe_interface_cleanup(fcoe); 2118b2085a4eSNeerav Parikh 21192e70e241SChris Leech mutex_unlock(&fcoe_config_mutex); 21202e70e241SChris Leech } 21212e70e241SChris Leech 2122a703e490SVasu Dev /** 212378a58246SYi Zou * fcoe_match() - Check if the FCoE is supported on the given netdevice 212478a58246SYi Zou * @netdev : The net_device object the Ethernet interface to create on 21251875f27eSRobert Love * 212678a58246SYi Zou * Called from fcoe transport. 212778a58246SYi Zou * 212878a58246SYi Zou * Returns: always returns true as this is the default FCoE transport, 212978a58246SYi Zou * i.e., support all netdevs. 213078a58246SYi Zou */ 213178a58246SYi Zou static bool fcoe_match(struct net_device *netdev) 213278a58246SYi Zou { 213378a58246SYi Zou return true; 213478a58246SYi Zou } 213578a58246SYi Zou 213678a58246SYi Zou /** 21376f6c2aa3Sjohn fastabend * fcoe_dcb_create() - Initialize DCB attributes and hooks 21386f6c2aa3Sjohn fastabend * @netdev: The net_device object of the L2 link that should be queried 21396f6c2aa3Sjohn fastabend * @port: The fcoe_port to bind FCoE APP priority with 21406f6c2aa3Sjohn fastabend * @ 21416f6c2aa3Sjohn fastabend */ 21426f6c2aa3Sjohn fastabend static void fcoe_dcb_create(struct fcoe_interface *fcoe) 21436f6c2aa3Sjohn fastabend { 21446f6c2aa3Sjohn fastabend #ifdef CONFIG_DCB 21456f6c2aa3Sjohn fastabend int dcbx; 21466f6c2aa3Sjohn fastabend u8 fup, up; 21476f6c2aa3Sjohn fastabend struct net_device *netdev = fcoe->realdev; 21486f6c2aa3Sjohn fastabend struct fcoe_port *port = lport_priv(fcoe->ctlr.lp); 21496f6c2aa3Sjohn fastabend struct dcb_app app = { 21506f6c2aa3Sjohn fastabend .priority = 0, 21516f6c2aa3Sjohn fastabend .protocol = ETH_P_FCOE 21526f6c2aa3Sjohn fastabend }; 21536f6c2aa3Sjohn fastabend 21546f6c2aa3Sjohn fastabend /* setup DCB priority attributes. */ 21556f6c2aa3Sjohn fastabend if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) { 21566f6c2aa3Sjohn fastabend dcbx = netdev->dcbnl_ops->getdcbx(netdev); 21576f6c2aa3Sjohn fastabend 21586f6c2aa3Sjohn fastabend if (dcbx & DCB_CAP_DCBX_VER_IEEE) { 21596f6c2aa3Sjohn fastabend app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE; 21606f6c2aa3Sjohn fastabend up = dcb_ieee_getapp_mask(netdev, &app); 21616f6c2aa3Sjohn fastabend app.protocol = ETH_P_FIP; 21626f6c2aa3Sjohn fastabend fup = dcb_ieee_getapp_mask(netdev, &app); 21636f6c2aa3Sjohn fastabend } else { 21646f6c2aa3Sjohn fastabend app.selector = DCB_APP_IDTYPE_ETHTYPE; 21656f6c2aa3Sjohn fastabend up = dcb_getapp(netdev, &app); 21666f6c2aa3Sjohn fastabend app.protocol = ETH_P_FIP; 21676f6c2aa3Sjohn fastabend fup = dcb_getapp(netdev, &app); 21686f6c2aa3Sjohn fastabend } 21696f6c2aa3Sjohn fastabend 21706f6c2aa3Sjohn fastabend port->priority = ffs(up) ? ffs(up) - 1 : 0; 21716f6c2aa3Sjohn fastabend fcoe->ctlr.priority = ffs(fup) ? ffs(fup) - 1 : port->priority; 21726f6c2aa3Sjohn fastabend } 21736f6c2aa3Sjohn fastabend #endif 21746f6c2aa3Sjohn fastabend } 21756f6c2aa3Sjohn fastabend 21766f6c2aa3Sjohn fastabend /** 217778a58246SYi Zou * fcoe_create() - Create a fcoe interface 217878a58246SYi Zou * @netdev : The net_device object the Ethernet interface to create on 217978a58246SYi Zou * @fip_mode: The FIP mode for this creation 218078a58246SYi Zou * 218178a58246SYi Zou * Called from fcoe transport 2182a703e490SVasu Dev * 2183a703e490SVasu Dev * Returns: 0 for success 2184a703e490SVasu Dev */ 218578a58246SYi Zou static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode) 2186a703e490SVasu Dev { 2187b2085a4eSNeerav Parikh int rc = 0; 2188030f4e00SChris Leech struct fcoe_interface *fcoe; 2189af7f85d9SChris Leech struct fc_lport *lport; 2190a703e490SVasu Dev 2191dfc1d0feSChris Leech mutex_lock(&fcoe_config_mutex); 2192ee5df628SRobert Love rtnl_lock(); 219334ce27bcSVasu Dev 2194a703e490SVasu Dev /* look for existing lport */ 2195a703e490SVasu Dev if (fcoe_hostlist_lookup(netdev)) { 2196a703e490SVasu Dev rc = -EEXIST; 219778a58246SYi Zou goto out_nodev; 2198a703e490SVasu Dev } 2199a703e490SVasu Dev 22001dd454d9SJoe Eykholt fcoe = fcoe_interface_create(netdev, fip_mode); 22017287fb91SRobert Love if (IS_ERR(fcoe)) { 22027287fb91SRobert Love rc = PTR_ERR(fcoe); 220378a58246SYi Zou goto out_nodev; 2204030f4e00SChris Leech } 2205030f4e00SChris Leech 22069a05753bSChris Leech lport = fcoe_if_create(fcoe, &netdev->dev, 0); 2207af7f85d9SChris Leech if (IS_ERR(lport)) { 2208d5488eb9SRobert Love printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", 2209a703e490SVasu Dev netdev->name); 2210a703e490SVasu Dev rc = -EIO; 2211848e7d5bSRobert Love rtnl_unlock(); 22122e70e241SChris Leech fcoe_interface_cleanup(fcoe); 2213848e7d5bSRobert Love goto out_nortnl; 2214a703e490SVasu Dev } 2215030f4e00SChris Leech 221654b649f8SChris Leech /* Make this the "master" N_Port */ 221754b649f8SChris Leech fcoe->ctlr.lp = lport; 2218030f4e00SChris Leech 22196f6c2aa3Sjohn fastabend /* setup DCB priority attributes. */ 22206f6c2aa3Sjohn fastabend fcoe_dcb_create(fcoe); 22216f6c2aa3Sjohn fastabend 2222c863df33SChris Leech /* add to lports list */ 2223c863df33SChris Leech fcoe_hostlist_add(lport); 2224c863df33SChris Leech 222554b649f8SChris Leech /* start FIP Discovery and FLOGI */ 222654b649f8SChris Leech lport->boot_time = jiffies; 222754b649f8SChris Leech fc_fabric_login(lport); 222854b649f8SChris Leech if (!fcoe_link_ok(lport)) 222954b649f8SChris Leech fcoe_ctlr_link_up(&fcoe->ctlr); 223054b649f8SChris Leech 2231a703e490SVasu Dev out_nodev: 223234ce27bcSVasu Dev rtnl_unlock(); 2233848e7d5bSRobert Love out_nortnl: 2234dfc1d0feSChris Leech mutex_unlock(&fcoe_config_mutex); 2235a703e490SVasu Dev return rc; 2236a703e490SVasu Dev } 2237a703e490SVasu Dev 2238a703e490SVasu Dev /** 22395e4f8fe7SRobert Love * fcoe_link_speed_update() - Update the supported and actual link speeds 22405e4f8fe7SRobert Love * @lport: The local port to update speeds for 2241a703e490SVasu Dev * 22425e4f8fe7SRobert Love * Returns: 0 if the ethtool query was successful 22435e4f8fe7SRobert Love * -1 if the ethtool query failed 2244a703e490SVasu Dev */ 22457c9c6841SBart Van Assche static int fcoe_link_speed_update(struct fc_lport *lport) 2246a703e490SVasu Dev { 22478597ae8bSBhanu Prakash Gollapudi struct net_device *netdev = fcoe_netdev(lport); 22488ae6dacaSDavid Decotigny struct ethtool_cmd ecmd; 2249a703e490SVasu Dev 22504bc71cb9SJiri Pirko if (!__ethtool_get_settings(netdev, &ecmd)) { 22511875f27eSRobert Love lport->link_supported_speeds &= 2252a703e490SVasu Dev ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT); 2253a703e490SVasu Dev if (ecmd.supported & (SUPPORTED_1000baseT_Half | 2254a703e490SVasu Dev SUPPORTED_1000baseT_Full)) 22551875f27eSRobert Love lport->link_supported_speeds |= FC_PORTSPEED_1GBIT; 2256a703e490SVasu Dev if (ecmd.supported & SUPPORTED_10000baseT_Full) 22571875f27eSRobert Love lport->link_supported_speeds |= 2258a703e490SVasu Dev FC_PORTSPEED_10GBIT; 22598ae6dacaSDavid Decotigny switch (ethtool_cmd_speed(&ecmd)) { 22608ae6dacaSDavid Decotigny case SPEED_1000: 22611875f27eSRobert Love lport->link_speed = FC_PORTSPEED_1GBIT; 22628ae6dacaSDavid Decotigny break; 22638ae6dacaSDavid Decotigny case SPEED_10000: 22641875f27eSRobert Love lport->link_speed = FC_PORTSPEED_10GBIT; 22658ae6dacaSDavid Decotigny break; 22668ae6dacaSDavid Decotigny } 22672f718d64SYi Zou return 0; 22682f718d64SYi Zou } 22692f718d64SYi Zou return -1; 2270a703e490SVasu Dev } 2271a703e490SVasu Dev 2272a703e490SVasu Dev /** 22735e4f8fe7SRobert Love * fcoe_link_ok() - Check if the link is OK for a local port 22745e4f8fe7SRobert Love * @lport: The local port to check link on 22755e4f8fe7SRobert Love * 22765e4f8fe7SRobert Love * Returns: 0 if link is UP and OK, -1 if not 22775e4f8fe7SRobert Love * 22785e4f8fe7SRobert Love */ 22797c9c6841SBart Van Assche static int fcoe_link_ok(struct fc_lport *lport) 22805e4f8fe7SRobert Love { 22818597ae8bSBhanu Prakash Gollapudi struct net_device *netdev = fcoe_netdev(lport); 22825e4f8fe7SRobert Love 22835e4f8fe7SRobert Love if (netif_oper_up(netdev)) 22845e4f8fe7SRobert Love return 0; 22855e4f8fe7SRobert Love return -1; 22865e4f8fe7SRobert Love } 22875e4f8fe7SRobert Love 22885e4f8fe7SRobert Love /** 22891875f27eSRobert Love * fcoe_percpu_clean() - Clear all pending skbs for an local port 22901875f27eSRobert Love * @lport: The local port whose skbs are to be cleared 2291e7a51997SJoe Eykholt * 2292e7a51997SJoe Eykholt * Must be called with fcoe_create_mutex held to single-thread completion. 2293e7a51997SJoe Eykholt * 2294e7a51997SJoe Eykholt * This flushes the pending skbs by adding a new skb to each queue and 2295e7a51997SJoe Eykholt * waiting until they are all freed. This assures us that not only are 2296e7a51997SJoe Eykholt * there no packets that will be handled by the lport, but also that any 2297e7a51997SJoe Eykholt * threads already handling packet have returned. 2298a703e490SVasu Dev */ 22997c9c6841SBart Van Assche static void fcoe_percpu_clean(struct fc_lport *lport) 2300a703e490SVasu Dev { 2301a703e490SVasu Dev struct fcoe_percpu_s *pp; 2302a703e490SVasu Dev struct fcoe_rcv_info *fr; 2303a703e490SVasu Dev struct sk_buff_head *list; 2304a703e490SVasu Dev struct sk_buff *skb, *next; 2305a703e490SVasu Dev struct sk_buff *head; 2306a703e490SVasu Dev unsigned int cpu; 2307a703e490SVasu Dev 2308a703e490SVasu Dev for_each_possible_cpu(cpu) { 2309a703e490SVasu Dev pp = &per_cpu(fcoe_percpu, cpu); 2310a703e490SVasu Dev spin_lock_bh(&pp->fcoe_rx_list.lock); 2311a703e490SVasu Dev list = &pp->fcoe_rx_list; 2312a703e490SVasu Dev head = list->next; 2313a703e490SVasu Dev for (skb = head; skb != (struct sk_buff *)list; 2314a703e490SVasu Dev skb = next) { 2315a703e490SVasu Dev next = skb->next; 2316a703e490SVasu Dev fr = fcoe_dev_from_skb(skb); 23171875f27eSRobert Love if (fr->fr_dev == lport) { 2318a703e490SVasu Dev __skb_unlink(skb, list); 2319a703e490SVasu Dev kfree_skb(skb); 2320a703e490SVasu Dev } 2321a703e490SVasu Dev } 2322e7a51997SJoe Eykholt 2323e7a51997SJoe Eykholt if (!pp->thread || !cpu_online(cpu)) { 2324a703e490SVasu Dev spin_unlock_bh(&pp->fcoe_rx_list.lock); 2325e7a51997SJoe Eykholt continue; 2326e7a51997SJoe Eykholt } 2327e7a51997SJoe Eykholt 2328e7a51997SJoe Eykholt skb = dev_alloc_skb(0); 2329e7a51997SJoe Eykholt if (!skb) { 2330e7a51997SJoe Eykholt spin_unlock_bh(&pp->fcoe_rx_list.lock); 2331e7a51997SJoe Eykholt continue; 2332e7a51997SJoe Eykholt } 2333e7a51997SJoe Eykholt skb->destructor = fcoe_percpu_flush_done; 2334e7a51997SJoe Eykholt 2335e7a51997SJoe Eykholt __skb_queue_tail(&pp->fcoe_rx_list, skb); 2336e7a51997SJoe Eykholt if (pp->fcoe_rx_list.qlen == 1) 2337e7a51997SJoe Eykholt wake_up_process(pp->thread); 2338e7a51997SJoe Eykholt spin_unlock_bh(&pp->fcoe_rx_list.lock); 2339e7a51997SJoe Eykholt 2340e7a51997SJoe Eykholt wait_for_completion(&fcoe_flush_completion); 2341a703e490SVasu Dev } 2342a703e490SVasu Dev } 2343a703e490SVasu Dev 2344a703e490SVasu Dev /** 23451875f27eSRobert Love * fcoe_reset() - Reset a local port 23461875f27eSRobert Love * @shost: The SCSI host associated with the local port to be reset 2347a703e490SVasu Dev * 23481875f27eSRobert Love * Returns: Always 0 (return value required by FC transport template) 2349a703e490SVasu Dev */ 23507c9c6841SBart Van Assche static int fcoe_reset(struct Scsi_Host *shost) 2351a703e490SVasu Dev { 2352a703e490SVasu Dev struct fc_lport *lport = shost_priv(shost); 2353d2f80952SVasu Dev struct fcoe_port *port = lport_priv(lport); 2354d2f80952SVasu Dev struct fcoe_interface *fcoe = port->priv; 2355d2f80952SVasu Dev 2356d2f80952SVasu Dev fcoe_ctlr_link_down(&fcoe->ctlr); 2357d2f80952SVasu Dev fcoe_clean_pending_queue(fcoe->ctlr.lp); 2358d2f80952SVasu Dev if (!fcoe_link_ok(fcoe->ctlr.lp)) 2359d2f80952SVasu Dev fcoe_ctlr_link_up(&fcoe->ctlr); 2360a703e490SVasu Dev return 0; 2361a703e490SVasu Dev } 2362a703e490SVasu Dev 2363a703e490SVasu Dev /** 23641875f27eSRobert Love * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device 23651875f27eSRobert Love * @netdev: The net device used as a key 2366a703e490SVasu Dev * 23671875f27eSRobert Love * Locking: Must be called with the RNL mutex held. 23681875f27eSRobert Love * 23691875f27eSRobert Love * Returns: NULL or the FCoE interface 2370a703e490SVasu Dev */ 2371014f5c3fSChris Leech static struct fcoe_interface * 23721875f27eSRobert Love fcoe_hostlist_lookup_port(const struct net_device *netdev) 2373a703e490SVasu Dev { 2374014f5c3fSChris Leech struct fcoe_interface *fcoe; 2375a703e490SVasu Dev 2376014f5c3fSChris Leech list_for_each_entry(fcoe, &fcoe_hostlist, list) { 23771875f27eSRobert Love if (fcoe->netdev == netdev) 2378014f5c3fSChris Leech return fcoe; 2379a703e490SVasu Dev } 2380a703e490SVasu Dev return NULL; 2381a703e490SVasu Dev } 2382a703e490SVasu Dev 2383a703e490SVasu Dev /** 23841875f27eSRobert Love * fcoe_hostlist_lookup() - Find the local port associated with a 23851875f27eSRobert Love * given net device 23861875f27eSRobert Love * @netdev: The netdevice used as a key 2387a703e490SVasu Dev * 23881875f27eSRobert Love * Locking: Must be called with the RTNL mutex held 23891875f27eSRobert Love * 23901875f27eSRobert Love * Returns: NULL or the local port 2391a703e490SVasu Dev */ 2392090eb6c4SChris Leech static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) 2393a703e490SVasu Dev { 2394014f5c3fSChris Leech struct fcoe_interface *fcoe; 2395a703e490SVasu Dev 2396014f5c3fSChris Leech fcoe = fcoe_hostlist_lookup_port(netdev); 23973fe9a0baSChris Leech return (fcoe) ? fcoe->ctlr.lp : NULL; 2398a703e490SVasu Dev } 2399a703e490SVasu Dev 2400a703e490SVasu Dev /** 24011875f27eSRobert Love * fcoe_hostlist_add() - Add the FCoE interface identified by a local 24021875f27eSRobert Love * port to the hostlist 24031875f27eSRobert Love * @lport: The local port that identifies the FCoE interface to be added 24041875f27eSRobert Love * 24051875f27eSRobert Love * Locking: must be called with the RTNL mutex held 2406a703e490SVasu Dev * 2407a703e490SVasu Dev * Returns: 0 for success 2408a703e490SVasu Dev */ 2409090eb6c4SChris Leech static int fcoe_hostlist_add(const struct fc_lport *lport) 2410a703e490SVasu Dev { 2411014f5c3fSChris Leech struct fcoe_interface *fcoe; 2412014f5c3fSChris Leech struct fcoe_port *port; 2413a703e490SVasu Dev 2414014f5c3fSChris Leech fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); 2415014f5c3fSChris Leech if (!fcoe) { 2416014f5c3fSChris Leech port = lport_priv(lport); 24178597ae8bSBhanu Prakash Gollapudi fcoe = port->priv; 2418014f5c3fSChris Leech list_add_tail(&fcoe->list, &fcoe_hostlist); 2419a703e490SVasu Dev } 2420a703e490SVasu Dev return 0; 2421a703e490SVasu Dev } 2422a703e490SVasu Dev 242378a58246SYi Zou 242478a58246SYi Zou static struct fcoe_transport fcoe_sw_transport = { 242578a58246SYi Zou .name = {FCOE_TRANSPORT_DEFAULT}, 242678a58246SYi Zou .attached = false, 242778a58246SYi Zou .list = LIST_HEAD_INIT(fcoe_sw_transport.list), 242878a58246SYi Zou .match = fcoe_match, 242978a58246SYi Zou .create = fcoe_create, 243078a58246SYi Zou .destroy = fcoe_destroy, 243178a58246SYi Zou .enable = fcoe_enable, 243278a58246SYi Zou .disable = fcoe_disable, 243378a58246SYi Zou }; 243478a58246SYi Zou 2435a703e490SVasu Dev /** 24361875f27eSRobert Love * fcoe_init() - Initialize fcoe.ko 2437a703e490SVasu Dev * 24381875f27eSRobert Love * Returns: 0 on success, or a negative value on failure 2439a703e490SVasu Dev */ 2440a703e490SVasu Dev static int __init fcoe_init(void) 2441a703e490SVasu Dev { 24421875f27eSRobert Love struct fcoe_percpu_s *p; 2443a703e490SVasu Dev unsigned int cpu; 2444a703e490SVasu Dev int rc = 0; 2445a703e490SVasu Dev 24462ca32b48STejun Heo fcoe_wq = alloc_workqueue("fcoe", 0, 0); 24472ca32b48STejun Heo if (!fcoe_wq) 24482ca32b48STejun Heo return -ENOMEM; 24492ca32b48STejun Heo 245078a58246SYi Zou /* register as a fcoe transport */ 245178a58246SYi Zou rc = fcoe_transport_attach(&fcoe_sw_transport); 245278a58246SYi Zou if (rc) { 245378a58246SYi Zou printk(KERN_ERR "failed to register an fcoe transport, check " 245478a58246SYi Zou "if libfcoe is loaded\n"); 245578a58246SYi Zou return rc; 245678a58246SYi Zou } 245778a58246SYi Zou 2458dfc1d0feSChris Leech mutex_lock(&fcoe_config_mutex); 2459dfc1d0feSChris Leech 2460a703e490SVasu Dev for_each_possible_cpu(cpu) { 2461a703e490SVasu Dev p = &per_cpu(fcoe_percpu, cpu); 2462a703e490SVasu Dev skb_queue_head_init(&p->fcoe_rx_list); 2463a703e490SVasu Dev } 2464a703e490SVasu Dev 2465a703e490SVasu Dev for_each_online_cpu(cpu) 2466a703e490SVasu Dev fcoe_percpu_thread_create(cpu); 2467a703e490SVasu Dev 2468a703e490SVasu Dev /* Initialize per CPU interrupt thread */ 2469a703e490SVasu Dev rc = register_hotcpu_notifier(&fcoe_cpu_notifier); 2470a703e490SVasu Dev if (rc) 2471a703e490SVasu Dev goto out_free; 2472a703e490SVasu Dev 2473a703e490SVasu Dev /* Setup link change notification */ 2474a703e490SVasu Dev fcoe_dev_setup(); 2475a703e490SVasu Dev 24765892c32fSChris Leech rc = fcoe_if_init(); 24775892c32fSChris Leech if (rc) 24785892c32fSChris Leech goto out_free; 2479a703e490SVasu Dev 2480dfc1d0feSChris Leech mutex_unlock(&fcoe_config_mutex); 2481a703e490SVasu Dev return 0; 2482a703e490SVasu Dev 2483a703e490SVasu Dev out_free: 2484a703e490SVasu Dev for_each_online_cpu(cpu) { 2485a703e490SVasu Dev fcoe_percpu_thread_destroy(cpu); 2486a703e490SVasu Dev } 2487dfc1d0feSChris Leech mutex_unlock(&fcoe_config_mutex); 24882ca32b48STejun Heo destroy_workqueue(fcoe_wq); 2489a703e490SVasu Dev return rc; 2490a703e490SVasu Dev } 2491a703e490SVasu Dev module_init(fcoe_init); 2492a703e490SVasu Dev 2493a703e490SVasu Dev /** 24941875f27eSRobert Love * fcoe_exit() - Clean up fcoe.ko 2495a703e490SVasu Dev * 24961875f27eSRobert Love * Returns: 0 on success or a negative value on failure 2497a703e490SVasu Dev */ 2498a703e490SVasu Dev static void __exit fcoe_exit(void) 2499a703e490SVasu Dev { 2500014f5c3fSChris Leech struct fcoe_interface *fcoe, *tmp; 25012e70e241SChris Leech struct fcoe_port *port; 25021875f27eSRobert Love unsigned int cpu; 2503a703e490SVasu Dev 2504dfc1d0feSChris Leech mutex_lock(&fcoe_config_mutex); 2505dfc1d0feSChris Leech 2506a703e490SVasu Dev fcoe_dev_cleanup(); 2507a703e490SVasu Dev 2508a703e490SVasu Dev /* releases the associated fcoe hosts */ 2509090eb6c4SChris Leech rtnl_lock(); 2510090eb6c4SChris Leech list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { 2511c863df33SChris Leech list_del(&fcoe->list); 25122e70e241SChris Leech port = lport_priv(fcoe->ctlr.lp); 25132ca32b48STejun Heo queue_work(fcoe_wq, &port->destroy_work); 2514c863df33SChris Leech } 2515090eb6c4SChris Leech rtnl_unlock(); 2516a703e490SVasu Dev 2517a703e490SVasu Dev unregister_hotcpu_notifier(&fcoe_cpu_notifier); 2518a703e490SVasu Dev 2519014f5c3fSChris Leech for_each_online_cpu(cpu) 2520a703e490SVasu Dev fcoe_percpu_thread_destroy(cpu); 2521a703e490SVasu Dev 2522dfc1d0feSChris Leech mutex_unlock(&fcoe_config_mutex); 25232e70e241SChris Leech 25242ca32b48STejun Heo /* 25252ca32b48STejun Heo * destroy_work's may be chained but destroy_workqueue() 25262ca32b48STejun Heo * can take care of them. Just kill the fcoe_wq. 25272ca32b48STejun Heo */ 25282ca32b48STejun Heo destroy_workqueue(fcoe_wq); 25292e70e241SChris Leech 25302ca32b48STejun Heo /* 25312ca32b48STejun Heo * Detaching from the scsi transport must happen after all 25322ca32b48STejun Heo * destroys are done on the fcoe_wq. destroy_workqueue will 25332ca32b48STejun Heo * enusre the fcoe_wq is flushed. 25342ca32b48STejun Heo */ 25352e70e241SChris Leech fcoe_if_exit(); 253678a58246SYi Zou 253778a58246SYi Zou /* detach from fcoe transport */ 253878a58246SYi Zou fcoe_transport_detach(&fcoe_sw_transport); 2539a703e490SVasu Dev } 2540a703e490SVasu Dev module_exit(fcoe_exit); 254111b56188SChris Leech 254211b56188SChris Leech /** 254311b56188SChris Leech * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler 254411b56188SChris Leech * @seq: active sequence in the FLOGI or FDISC exchange 254511b56188SChris Leech * @fp: response frame, or error encoded in a pointer (timeout) 254611b56188SChris Leech * @arg: pointer the the fcoe_ctlr structure 254711b56188SChris Leech * 254865155b37SUwe Kleine-König * This handles MAC address management for FCoE, then passes control on to 254911b56188SChris Leech * the libfc FLOGI response handler. 255011b56188SChris Leech */ 255111b56188SChris Leech static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) 255211b56188SChris Leech { 255311b56188SChris Leech struct fcoe_ctlr *fip = arg; 255411b56188SChris Leech struct fc_exch *exch = fc_seq_exch(seq); 255511b56188SChris Leech struct fc_lport *lport = exch->lp; 255611b56188SChris Leech u8 *mac; 255711b56188SChris Leech 255811b56188SChris Leech if (IS_ERR(fp)) 255911b56188SChris Leech goto done; 256011b56188SChris Leech 256111b56188SChris Leech mac = fr_cb(fp)->granted_mac; 256211b56188SChris Leech /* pre-FIP */ 2563907c07d4SVasu Dev if (is_zero_ether_addr(mac)) 2564907c07d4SVasu Dev fcoe_ctlr_recv_flogi(fip, lport, fp); 2565907c07d4SVasu Dev if (!is_zero_ether_addr(mac)) 2566386309ceSJoe Eykholt fcoe_update_src_mac(lport, mac); 256711b56188SChris Leech done: 256811b56188SChris Leech fc_lport_flogi_resp(seq, fp, lport); 256911b56188SChris Leech } 257011b56188SChris Leech 257111b56188SChris Leech /** 257211b56188SChris Leech * fcoe_logo_resp() - FCoE specific LOGO response handler 257311b56188SChris Leech * @seq: active sequence in the LOGO exchange 257411b56188SChris Leech * @fp: response frame, or error encoded in a pointer (timeout) 257511b56188SChris Leech * @arg: pointer the the fcoe_ctlr structure 257611b56188SChris Leech * 257765155b37SUwe Kleine-König * This handles MAC address management for FCoE, then passes control on to 257811b56188SChris Leech * the libfc LOGO response handler. 257911b56188SChris Leech */ 258011b56188SChris Leech static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) 258111b56188SChris Leech { 2582386309ceSJoe Eykholt struct fc_lport *lport = arg; 258311b56188SChris Leech static u8 zero_mac[ETH_ALEN] = { 0 }; 258411b56188SChris Leech 258511b56188SChris Leech if (!IS_ERR(fp)) 2586386309ceSJoe Eykholt fcoe_update_src_mac(lport, zero_mac); 258711b56188SChris Leech fc_lport_logo_resp(seq, fp, lport); 258811b56188SChris Leech } 258911b56188SChris Leech 259011b56188SChris Leech /** 259111b56188SChris Leech * fcoe_elsct_send - FCoE specific ELS handler 259211b56188SChris Leech * 259311b56188SChris Leech * This does special case handling of FIP encapsualted ELS exchanges for FCoE, 259411b56188SChris Leech * using FCoE specific response handlers and passing the FIP controller as 259511b56188SChris Leech * the argument (the lport is still available from the exchange). 259611b56188SChris Leech * 259711b56188SChris Leech * Most of the work here is just handed off to the libfc routine. 259811b56188SChris Leech */ 25991875f27eSRobert Love static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, 26001875f27eSRobert Love struct fc_frame *fp, unsigned int op, 26011875f27eSRobert Love void (*resp)(struct fc_seq *, 26021875f27eSRobert Love struct fc_frame *, 26031875f27eSRobert Love void *), 260411b56188SChris Leech void *arg, u32 timeout) 260511b56188SChris Leech { 260611b56188SChris Leech struct fcoe_port *port = lport_priv(lport); 26078597ae8bSBhanu Prakash Gollapudi struct fcoe_interface *fcoe = port->priv; 260811b56188SChris Leech struct fcoe_ctlr *fip = &fcoe->ctlr; 260911b56188SChris Leech struct fc_frame_header *fh = fc_frame_header_get(fp); 261011b56188SChris Leech 261111b56188SChris Leech switch (op) { 261211b56188SChris Leech case ELS_FLOGI: 261311b56188SChris Leech case ELS_FDISC: 2614e10f8c66SJoe Eykholt if (lport->point_to_multipoint) 2615e10f8c66SJoe Eykholt break; 261611b56188SChris Leech return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, 261711b56188SChris Leech fip, timeout); 261811b56188SChris Leech case ELS_LOGO: 261911b56188SChris Leech /* only hook onto fabric logouts, not port logouts */ 262011b56188SChris Leech if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) 262111b56188SChris Leech break; 262211b56188SChris Leech return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, 2623386309ceSJoe Eykholt lport, timeout); 262411b56188SChris Leech } 262511b56188SChris Leech return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); 262611b56188SChris Leech } 262711b56188SChris Leech 26289a05753bSChris Leech /** 26299a05753bSChris Leech * fcoe_vport_create() - create an fc_host/scsi_host for a vport 26309a05753bSChris Leech * @vport: fc_vport object to create a new fc_host for 26319a05753bSChris Leech * @disabled: start the new fc_host in a disabled state by default? 26329a05753bSChris Leech * 26339a05753bSChris Leech * Returns: 0 for success 26349a05753bSChris Leech */ 26359a05753bSChris Leech static int fcoe_vport_create(struct fc_vport *vport, bool disabled) 26369a05753bSChris Leech { 26379a05753bSChris Leech struct Scsi_Host *shost = vport_to_shost(vport); 26389a05753bSChris Leech struct fc_lport *n_port = shost_priv(shost); 26399a05753bSChris Leech struct fcoe_port *port = lport_priv(n_port); 26408597ae8bSBhanu Prakash Gollapudi struct fcoe_interface *fcoe = port->priv; 26419a05753bSChris Leech struct net_device *netdev = fcoe->netdev; 26429a05753bSChris Leech struct fc_lport *vn_port; 2643bdf25218SNeerav Parikh int rc; 2644bdf25218SNeerav Parikh char buf[32]; 2645bdf25218SNeerav Parikh 2646bdf25218SNeerav Parikh rc = fcoe_validate_vport_create(vport); 2647bdf25218SNeerav Parikh if (rc) { 2648d834895cSBhanu Prakash Gollapudi fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf)); 2649bdf25218SNeerav Parikh printk(KERN_ERR "fcoe: Failed to create vport, " 2650bdf25218SNeerav Parikh "WWPN (0x%s) already exists\n", 2651bdf25218SNeerav Parikh buf); 2652bdf25218SNeerav Parikh return rc; 2653bdf25218SNeerav Parikh } 26549a05753bSChris Leech 26559a05753bSChris Leech mutex_lock(&fcoe_config_mutex); 26564bc71cb9SJiri Pirko rtnl_lock(); 26579a05753bSChris Leech vn_port = fcoe_if_create(fcoe, &vport->dev, 1); 26584bc71cb9SJiri Pirko rtnl_unlock(); 26599a05753bSChris Leech mutex_unlock(&fcoe_config_mutex); 26609a05753bSChris Leech 26619a05753bSChris Leech if (IS_ERR(vn_port)) { 26629a05753bSChris Leech printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", 26639a05753bSChris Leech netdev->name); 26649a05753bSChris Leech return -EIO; 26659a05753bSChris Leech } 26669a05753bSChris Leech 26679a05753bSChris Leech if (disabled) { 26689a05753bSChris Leech fc_vport_set_state(vport, FC_VPORT_DISABLED); 26699a05753bSChris Leech } else { 26709a05753bSChris Leech vn_port->boot_time = jiffies; 26719a05753bSChris Leech fc_fabric_login(vn_port); 26729a05753bSChris Leech fc_vport_setlink(vn_port); 26739a05753bSChris Leech } 26749a05753bSChris Leech return 0; 26759a05753bSChris Leech } 26769a05753bSChris Leech 26779a05753bSChris Leech /** 26789a05753bSChris Leech * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport 26799a05753bSChris Leech * @vport: fc_vport object that is being destroyed 26809a05753bSChris Leech * 26819a05753bSChris Leech * Returns: 0 for success 26829a05753bSChris Leech */ 26839a05753bSChris Leech static int fcoe_vport_destroy(struct fc_vport *vport) 26849a05753bSChris Leech { 26859a05753bSChris Leech struct Scsi_Host *shost = vport_to_shost(vport); 26869a05753bSChris Leech struct fc_lport *n_port = shost_priv(shost); 26879a05753bSChris Leech struct fc_lport *vn_port = vport->dd_data; 26889a05753bSChris Leech 26899a05753bSChris Leech mutex_lock(&n_port->lp_mutex); 26909a05753bSChris Leech list_del(&vn_port->list); 26919a05753bSChris Leech mutex_unlock(&n_port->lp_mutex); 2692ccefd23eSRobert Love 2693ccefd23eSRobert Love mutex_lock(&fcoe_config_mutex); 2694ccefd23eSRobert Love fcoe_if_destroy(vn_port); 2695ccefd23eSRobert Love mutex_unlock(&fcoe_config_mutex); 2696ccefd23eSRobert Love 26979a05753bSChris Leech return 0; 26989a05753bSChris Leech } 26999a05753bSChris Leech 27009a05753bSChris Leech /** 27019a05753bSChris Leech * fcoe_vport_disable() - change vport state 27029a05753bSChris Leech * @vport: vport to bring online/offline 27039a05753bSChris Leech * @disable: should the vport be disabled? 27049a05753bSChris Leech */ 27059a05753bSChris Leech static int fcoe_vport_disable(struct fc_vport *vport, bool disable) 27069a05753bSChris Leech { 27079a05753bSChris Leech struct fc_lport *lport = vport->dd_data; 27089a05753bSChris Leech 27099a05753bSChris Leech if (disable) { 27109a05753bSChris Leech fc_vport_set_state(vport, FC_VPORT_DISABLED); 27119a05753bSChris Leech fc_fabric_logoff(lport); 27129a05753bSChris Leech } else { 27139a05753bSChris Leech lport->boot_time = jiffies; 27149a05753bSChris Leech fc_fabric_login(lport); 27159a05753bSChris Leech fc_vport_setlink(lport); 27169a05753bSChris Leech } 27179a05753bSChris Leech 27189a05753bSChris Leech return 0; 27199a05753bSChris Leech } 27209a05753bSChris Leech 2721dc8596d3SChris Leech /** 2722dc8596d3SChris Leech * fcoe_vport_set_symbolic_name() - append vport string to symbolic name 2723dc8596d3SChris Leech * @vport: fc_vport with a new symbolic name string 2724dc8596d3SChris Leech * 2725dc8596d3SChris Leech * After generating a new symbolic name string, a new RSPN_ID request is 2726dc8596d3SChris Leech * sent to the name server. There is no response handler, so if it fails 2727dc8596d3SChris Leech * for some reason it will not be retried. 2728dc8596d3SChris Leech */ 2729dc8596d3SChris Leech static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) 2730dc8596d3SChris Leech { 2731dc8596d3SChris Leech struct fc_lport *lport = vport->dd_data; 2732dc8596d3SChris Leech struct fc_frame *fp; 2733dc8596d3SChris Leech size_t len; 2734dc8596d3SChris Leech 2735dc8596d3SChris Leech snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, 2736dc8596d3SChris Leech "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, 2737dc8596d3SChris Leech fcoe_netdev(lport)->name, vport->symbolic_name); 2738dc8596d3SChris Leech 2739dc8596d3SChris Leech if (lport->state != LPORT_ST_READY) 2740dc8596d3SChris Leech return; 2741dc8596d3SChris Leech 2742dc8596d3SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 2743dc8596d3SChris Leech fp = fc_frame_alloc(lport, 2744dc8596d3SChris Leech sizeof(struct fc_ct_hdr) + 2745dc8596d3SChris Leech sizeof(struct fc_ns_rspn) + len); 2746dc8596d3SChris Leech if (!fp) 2747dc8596d3SChris Leech return; 2748dc8596d3SChris Leech lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, 2749b94f8951SJoe Eykholt NULL, NULL, 3 * lport->r_a_tov); 2750dc8596d3SChris Leech } 2751b84056bfSYi Zou 2752b84056bfSYi Zou /** 2753b84056bfSYi Zou * fcoe_get_lesb() - Fill the FCoE Link Error Status Block 2754b84056bfSYi Zou * @lport: the local port 2755b84056bfSYi Zou * @fc_lesb: the link error status block 2756b84056bfSYi Zou */ 2757b84056bfSYi Zou static void fcoe_get_lesb(struct fc_lport *lport, 2758b84056bfSYi Zou struct fc_els_lesb *fc_lesb) 2759b84056bfSYi Zou { 2760b84056bfSYi Zou struct net_device *netdev = fcoe_netdev(lport); 2761b84056bfSYi Zou 2762814740d5SBhanu Prakash Gollapudi __fcoe_get_lesb(lport, fc_lesb, netdev); 2763b84056bfSYi Zou } 27647d65b0dfSJoe Eykholt 27657d65b0dfSJoe Eykholt /** 27667d65b0dfSJoe Eykholt * fcoe_set_port_id() - Callback from libfc when Port_ID is set. 27677d65b0dfSJoe Eykholt * @lport: the local port 27687d65b0dfSJoe Eykholt * @port_id: the port ID 27697d65b0dfSJoe Eykholt * @fp: the received frame, if any, that caused the port_id to be set. 27707d65b0dfSJoe Eykholt * 27717d65b0dfSJoe Eykholt * This routine handles the case where we received a FLOGI and are 27727d65b0dfSJoe Eykholt * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi() 27737d65b0dfSJoe Eykholt * so it can set the non-mapped mode and gateway address. 27747d65b0dfSJoe Eykholt * 27757d65b0dfSJoe Eykholt * The FLOGI LS_ACC is handled by fcoe_flogi_resp(). 27767d65b0dfSJoe Eykholt */ 27777d65b0dfSJoe Eykholt static void fcoe_set_port_id(struct fc_lport *lport, 27787d65b0dfSJoe Eykholt u32 port_id, struct fc_frame *fp) 27797d65b0dfSJoe Eykholt { 27807d65b0dfSJoe Eykholt struct fcoe_port *port = lport_priv(lport); 27818597ae8bSBhanu Prakash Gollapudi struct fcoe_interface *fcoe = port->priv; 27827d65b0dfSJoe Eykholt 27837d65b0dfSJoe Eykholt if (fp && fc_frame_payload_op(fp) == ELS_FLOGI) 27847d65b0dfSJoe Eykholt fcoe_ctlr_recv_flogi(&fcoe->ctlr, lport, fp); 27857d65b0dfSJoe Eykholt } 2786