1a703e490SVasu Dev /* 2af7f85d9SChris Leech * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved. 3a703e490SVasu Dev * 4a703e490SVasu Dev * This program is free software; you can redistribute it and/or modify it 5a703e490SVasu Dev * under the terms and conditions of the GNU General Public License, 6a703e490SVasu Dev * version 2, as published by the Free Software Foundation. 7a703e490SVasu Dev * 8a703e490SVasu Dev * This program is distributed in the hope it will be useful, but WITHOUT 9a703e490SVasu Dev * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10a703e490SVasu Dev * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11a703e490SVasu Dev * more details. 12a703e490SVasu Dev * 13a703e490SVasu Dev * You should have received a copy of the GNU General Public License along with 14a703e490SVasu Dev * this program; if not, write to the Free Software Foundation, Inc., 15a703e490SVasu Dev * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 16a703e490SVasu Dev * 17a703e490SVasu Dev * Maintained at www.Open-FCoE.org 18a703e490SVasu Dev */ 19a703e490SVasu Dev 20a703e490SVasu Dev #include <linux/module.h> 21a703e490SVasu Dev #include <linux/version.h> 22a703e490SVasu Dev #include <linux/spinlock.h> 23a703e490SVasu Dev #include <linux/netdevice.h> 24a703e490SVasu Dev #include <linux/etherdevice.h> 25a703e490SVasu Dev #include <linux/ethtool.h> 26a703e490SVasu Dev #include <linux/if_ether.h> 27a703e490SVasu Dev #include <linux/if_vlan.h> 28a703e490SVasu Dev #include <linux/crc32.h> 295a0e3ad6STejun Heo #include <linux/slab.h> 30a703e490SVasu Dev #include <linux/cpu.h> 31a703e490SVasu Dev #include <linux/fs.h> 32a703e490SVasu Dev #include <linux/sysfs.h> 33a703e490SVasu Dev #include <linux/ctype.h> 34a703e490SVasu Dev #include <scsi/scsi_tcq.h> 35a703e490SVasu Dev #include <scsi/scsicam.h> 36a703e490SVasu Dev #include <scsi/scsi_transport.h> 37a703e490SVasu Dev #include <scsi/scsi_transport_fc.h> 38a703e490SVasu Dev #include <net/rtnetlink.h> 39a703e490SVasu Dev 40a703e490SVasu Dev #include <scsi/fc/fc_encaps.h> 4197c8389dSJoe Eykholt #include <scsi/fc/fc_fip.h> 42a703e490SVasu Dev 43a703e490SVasu Dev #include <scsi/libfc.h> 44a703e490SVasu Dev #include <scsi/fc_frame.h> 45a703e490SVasu Dev #include <scsi/libfcoe.h> 46a703e490SVasu Dev 47fdd78027SVasu Dev #include "fcoe.h" 48fdd78027SVasu Dev 49a703e490SVasu Dev MODULE_AUTHOR("Open-FCoE.org"); 50a703e490SVasu Dev MODULE_DESCRIPTION("FCoE"); 519b34ecffSVasu Dev MODULE_LICENSE("GPL v2"); 52a703e490SVasu Dev 5305cc7390SYi Zou /* Performance tuning parameters for fcoe */ 5405cc7390SYi Zou static unsigned int fcoe_ddp_min; 5505cc7390SYi Zou module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); 5605cc7390SYi Zou MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ 5705cc7390SYi Zou "Direct Data Placement (DDP)."); 5805cc7390SYi Zou 59dfc1d0feSChris Leech DEFINE_MUTEX(fcoe_config_mutex); 60dfc1d0feSChris Leech 61e7a51997SJoe Eykholt /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */ 62e7a51997SJoe Eykholt static DECLARE_COMPLETION(fcoe_flush_completion); 63e7a51997SJoe Eykholt 64a703e490SVasu Dev /* fcoe host list */ 65090eb6c4SChris Leech /* must only by accessed under the RTNL mutex */ 66a703e490SVasu Dev LIST_HEAD(fcoe_hostlist); 67a703e490SVasu Dev DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); 68a703e490SVasu Dev 69dd3fd72eSChris Leech /* Function Prototypes */ 701875f27eSRobert Love static int fcoe_reset(struct Scsi_Host *); 71fdd78027SVasu Dev static int fcoe_xmit(struct fc_lport *, struct fc_frame *); 72fdd78027SVasu Dev static int fcoe_rcv(struct sk_buff *, struct net_device *, 73fdd78027SVasu Dev struct packet_type *, struct net_device *); 741875f27eSRobert Love static int fcoe_percpu_receive_thread(void *); 751875f27eSRobert Love static void fcoe_clean_pending_queue(struct fc_lport *); 761875f27eSRobert Love static void fcoe_percpu_clean(struct fc_lport *); 775e4f8fe7SRobert Love static int fcoe_link_speed_update(struct fc_lport *); 781875f27eSRobert Love static int fcoe_link_ok(struct fc_lport *); 79fdd78027SVasu Dev 80fdd78027SVasu Dev static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); 81fdd78027SVasu Dev static int fcoe_hostlist_add(const struct fc_lport *); 82fdd78027SVasu Dev 834bb6b515SVasu Dev static void fcoe_check_wait_queue(struct fc_lport *, struct sk_buff *); 84a703e490SVasu Dev static int fcoe_device_notification(struct notifier_block *, ulong, void *); 85a703e490SVasu Dev static void fcoe_dev_setup(void); 86a703e490SVasu Dev static void fcoe_dev_cleanup(void); 871875f27eSRobert Love static struct fcoe_interface 881875f27eSRobert Love *fcoe_hostlist_lookup_port(const struct net_device *); 89a703e490SVasu Dev 901875f27eSRobert Love static int fcoe_fip_recv(struct sk_buff *, struct net_device *, 911875f27eSRobert Love struct packet_type *, struct net_device *); 921875f27eSRobert Love 931875f27eSRobert Love static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); 941875f27eSRobert Love static void fcoe_update_src_mac(struct fc_lport *, u8 *); 951875f27eSRobert Love static u8 *fcoe_get_src_mac(struct fc_lport *); 961875f27eSRobert Love static void fcoe_destroy_work(struct work_struct *); 971875f27eSRobert Love 981875f27eSRobert Love static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, 991875f27eSRobert Love unsigned int); 1001875f27eSRobert Love static int fcoe_ddp_done(struct fc_lport *, u16); 1011875f27eSRobert Love 1021875f27eSRobert Love static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *); 1031875f27eSRobert Love 1041875f27eSRobert Love static int fcoe_create(const char *, struct kernel_param *); 1051875f27eSRobert Love static int fcoe_destroy(const char *, struct kernel_param *); 10655a66d3cSVasu Dev static int fcoe_enable(const char *, struct kernel_param *); 10755a66d3cSVasu Dev static int fcoe_disable(const char *, struct kernel_param *); 1081875f27eSRobert Love 1091875f27eSRobert Love static struct fc_seq *fcoe_elsct_send(struct fc_lport *, 1101875f27eSRobert Love u32 did, struct fc_frame *, 1111875f27eSRobert Love unsigned int op, 1121875f27eSRobert Love void (*resp)(struct fc_seq *, 1131875f27eSRobert Love struct fc_frame *, 1141875f27eSRobert Love void *), 1151875f27eSRobert Love void *, u32 timeout); 116859b7b64SChris Leech static void fcoe_recv_frame(struct sk_buff *skb); 1171875f27eSRobert Love 118b84056bfSYi Zou static void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *); 119b84056bfSYi Zou 1203067817aSVasu Dev module_param_call(create, fcoe_create, NULL, (void *)FIP_MODE_FABRIC, S_IWUSR); 1211875f27eSRobert Love __MODULE_PARM_TYPE(create, "string"); 12255a66d3cSVasu Dev MODULE_PARM_DESC(create, " Creates fcoe instance on a ethernet interface"); 1231dd454d9SJoe Eykholt module_param_call(create_vn2vn, fcoe_create, NULL, 1241dd454d9SJoe Eykholt (void *)FIP_MODE_VN2VN, S_IWUSR); 1251dd454d9SJoe Eykholt __MODULE_PARM_TYPE(create_vn2vn, "string"); 1261dd454d9SJoe Eykholt MODULE_PARM_DESC(create_vn2vn, " Creates a VN_node to VN_node FCoE instance " 1271dd454d9SJoe Eykholt "on an Ethernet interface"); 1281875f27eSRobert Love module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR); 1291875f27eSRobert Love __MODULE_PARM_TYPE(destroy, "string"); 13055a66d3cSVasu Dev MODULE_PARM_DESC(destroy, " Destroys fcoe instance on a ethernet interface"); 13155a66d3cSVasu Dev module_param_call(enable, fcoe_enable, NULL, NULL, S_IWUSR); 13255a66d3cSVasu Dev __MODULE_PARM_TYPE(enable, "string"); 13355a66d3cSVasu Dev MODULE_PARM_DESC(enable, " Enables fcoe on a ethernet interface."); 13455a66d3cSVasu Dev module_param_call(disable, fcoe_disable, NULL, NULL, S_IWUSR); 13555a66d3cSVasu Dev __MODULE_PARM_TYPE(disable, "string"); 13655a66d3cSVasu Dev MODULE_PARM_DESC(disable, " Disables fcoe on a ethernet interface."); 1371875f27eSRobert Love 1381875f27eSRobert Love /* notification function for packets from net device */ 139a703e490SVasu Dev static struct notifier_block fcoe_notifier = { 140a703e490SVasu Dev .notifier_call = fcoe_device_notification, 141a703e490SVasu Dev }; 142a703e490SVasu Dev 1431875f27eSRobert Love /* notification function for CPU hotplug events */ 1441875f27eSRobert Love static struct notifier_block fcoe_cpu_notifier = { 1451875f27eSRobert Love .notifier_call = fcoe_cpu_callback, 1461875f27eSRobert Love }; 1471875f27eSRobert Love 148e9084bb8SChris Leech static struct scsi_transport_template *fcoe_transport_template; 149e9084bb8SChris Leech static struct scsi_transport_template *fcoe_vport_transport_template; 150a703e490SVasu Dev 1511875f27eSRobert Love static int fcoe_vport_destroy(struct fc_vport *); 1521875f27eSRobert Love static int fcoe_vport_create(struct fc_vport *, bool disabled); 1531875f27eSRobert Love static int fcoe_vport_disable(struct fc_vport *, bool disable); 1541875f27eSRobert Love static void fcoe_set_vport_symbolic_name(struct fc_vport *); 1557d65b0dfSJoe Eykholt static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *); 1561875f27eSRobert Love 1571875f27eSRobert Love static struct libfc_function_template fcoe_libfc_fcn_templ = { 1581875f27eSRobert Love .frame_send = fcoe_xmit, 1591875f27eSRobert Love .ddp_setup = fcoe_ddp_setup, 1601875f27eSRobert Love .ddp_done = fcoe_ddp_done, 1611875f27eSRobert Love .elsct_send = fcoe_elsct_send, 162b84056bfSYi Zou .get_lesb = fcoe_get_lesb, 1637d65b0dfSJoe Eykholt .lport_set_port_id = fcoe_set_port_id, 1641875f27eSRobert Love }; 1659a05753bSChris Leech 166a703e490SVasu Dev struct fc_function_template fcoe_transport_function = { 167a703e490SVasu Dev .show_host_node_name = 1, 168a703e490SVasu Dev .show_host_port_name = 1, 169a703e490SVasu Dev .show_host_supported_classes = 1, 170a703e490SVasu Dev .show_host_supported_fc4s = 1, 171a703e490SVasu Dev .show_host_active_fc4s = 1, 172a703e490SVasu Dev .show_host_maxframe_size = 1, 173a703e490SVasu Dev 174a703e490SVasu Dev .show_host_port_id = 1, 175a703e490SVasu Dev .show_host_supported_speeds = 1, 176a703e490SVasu Dev .get_host_speed = fc_get_host_speed, 177a703e490SVasu Dev .show_host_speed = 1, 178a703e490SVasu Dev .show_host_port_type = 1, 179a703e490SVasu Dev .get_host_port_state = fc_get_host_port_state, 180a703e490SVasu Dev .show_host_port_state = 1, 181a703e490SVasu Dev .show_host_symbolic_name = 1, 182a703e490SVasu Dev 183a703e490SVasu Dev .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 184a703e490SVasu Dev .show_rport_maxframe_size = 1, 185a703e490SVasu Dev .show_rport_supported_classes = 1, 186a703e490SVasu Dev 187a703e490SVasu Dev .show_host_fabric_name = 1, 188a703e490SVasu Dev .show_starget_node_name = 1, 189a703e490SVasu Dev .show_starget_port_name = 1, 190a703e490SVasu Dev .show_starget_port_id = 1, 191a703e490SVasu Dev .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, 192a703e490SVasu Dev .show_rport_dev_loss_tmo = 1, 193a703e490SVasu Dev .get_fc_host_stats = fc_get_host_stats, 194a703e490SVasu Dev .issue_fc_host_lip = fcoe_reset, 195a703e490SVasu Dev 196a703e490SVasu Dev .terminate_rport_io = fc_rport_terminate_io, 1979a05753bSChris Leech 1989a05753bSChris Leech .vport_create = fcoe_vport_create, 1999a05753bSChris Leech .vport_delete = fcoe_vport_destroy, 2009a05753bSChris Leech .vport_disable = fcoe_vport_disable, 201dc8596d3SChris Leech .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, 202a51ab396SSteve Ma 203a51ab396SSteve Ma .bsg_request = fc_lport_bsg_request, 204a703e490SVasu Dev }; 205a703e490SVasu Dev 206e9084bb8SChris Leech struct fc_function_template fcoe_vport_transport_function = { 207e9084bb8SChris Leech .show_host_node_name = 1, 208e9084bb8SChris Leech .show_host_port_name = 1, 209e9084bb8SChris Leech .show_host_supported_classes = 1, 210e9084bb8SChris Leech .show_host_supported_fc4s = 1, 211e9084bb8SChris Leech .show_host_active_fc4s = 1, 212e9084bb8SChris Leech .show_host_maxframe_size = 1, 213e9084bb8SChris Leech 214e9084bb8SChris Leech .show_host_port_id = 1, 215e9084bb8SChris Leech .show_host_supported_speeds = 1, 216e9084bb8SChris Leech .get_host_speed = fc_get_host_speed, 217e9084bb8SChris Leech .show_host_speed = 1, 218e9084bb8SChris Leech .show_host_port_type = 1, 219e9084bb8SChris Leech .get_host_port_state = fc_get_host_port_state, 220e9084bb8SChris Leech .show_host_port_state = 1, 221e9084bb8SChris Leech .show_host_symbolic_name = 1, 222e9084bb8SChris Leech 223e9084bb8SChris Leech .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 224e9084bb8SChris Leech .show_rport_maxframe_size = 1, 225e9084bb8SChris Leech .show_rport_supported_classes = 1, 226e9084bb8SChris Leech 227e9084bb8SChris Leech .show_host_fabric_name = 1, 228e9084bb8SChris Leech .show_starget_node_name = 1, 229e9084bb8SChris Leech .show_starget_port_name = 1, 230e9084bb8SChris Leech .show_starget_port_id = 1, 231e9084bb8SChris Leech .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, 232e9084bb8SChris Leech .show_rport_dev_loss_tmo = 1, 233e9084bb8SChris Leech .get_fc_host_stats = fc_get_host_stats, 234e9084bb8SChris Leech .issue_fc_host_lip = fcoe_reset, 235e9084bb8SChris Leech 236e9084bb8SChris Leech .terminate_rport_io = fc_rport_terminate_io, 237a51ab396SSteve Ma 238a51ab396SSteve Ma .bsg_request = fc_lport_bsg_request, 239e9084bb8SChris Leech }; 240e9084bb8SChris Leech 241a703e490SVasu Dev static struct scsi_host_template fcoe_shost_template = { 242a703e490SVasu Dev .module = THIS_MODULE, 243a703e490SVasu Dev .name = "FCoE Driver", 244a703e490SVasu Dev .proc_name = FCOE_NAME, 245a703e490SVasu Dev .queuecommand = fc_queuecommand, 246a703e490SVasu Dev .eh_abort_handler = fc_eh_abort, 247a703e490SVasu Dev .eh_device_reset_handler = fc_eh_device_reset, 248a703e490SVasu Dev .eh_host_reset_handler = fc_eh_host_reset, 249a703e490SVasu Dev .slave_alloc = fc_slave_alloc, 250a703e490SVasu Dev .change_queue_depth = fc_change_queue_depth, 251a703e490SVasu Dev .change_queue_type = fc_change_queue_type, 252a703e490SVasu Dev .this_id = -1, 25314caf44cSVasu Dev .cmd_per_lun = 3, 254a703e490SVasu Dev .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, 255a703e490SVasu Dev .use_clustering = ENABLE_CLUSTERING, 256a703e490SVasu Dev .sg_tablesize = SG_ALL, 257a703e490SVasu Dev .max_sectors = 0xffff, 258a703e490SVasu Dev }; 259a703e490SVasu Dev 26054b649f8SChris Leech /** 2611875f27eSRobert Love * fcoe_interface_setup() - Setup a FCoE interface 2621875f27eSRobert Love * @fcoe: The new FCoE interface 2631875f27eSRobert Love * @netdev: The net device that the fcoe interface is on 26454b649f8SChris Leech * 26554b649f8SChris Leech * Returns : 0 for success 2662e70e241SChris Leech * Locking: must be called with the RTNL mutex held 26754b649f8SChris Leech */ 26854b649f8SChris Leech static int fcoe_interface_setup(struct fcoe_interface *fcoe, 26954b649f8SChris Leech struct net_device *netdev) 27054b649f8SChris Leech { 27154b649f8SChris Leech struct fcoe_ctlr *fip = &fcoe->ctlr; 27254b649f8SChris Leech struct netdev_hw_addr *ha; 2735bab87e6SYi Zou struct net_device *real_dev; 27454b649f8SChris Leech u8 flogi_maddr[ETH_ALEN]; 275b7a727f1SYi Zou const struct net_device_ops *ops; 27654b649f8SChris Leech 27754b649f8SChris Leech fcoe->netdev = netdev; 27854b649f8SChris Leech 279b7a727f1SYi Zou /* Let LLD initialize for FCoE */ 280b7a727f1SYi Zou ops = netdev->netdev_ops; 281b7a727f1SYi Zou if (ops->ndo_fcoe_enable) { 282b7a727f1SYi Zou if (ops->ndo_fcoe_enable(netdev)) 283b7a727f1SYi Zou FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" 284b7a727f1SYi Zou " specific feature for LLD.\n"); 285b7a727f1SYi Zou } 286b7a727f1SYi Zou 28754b649f8SChris Leech /* Do not support for bonding device */ 28854b649f8SChris Leech if ((netdev->priv_flags & IFF_MASTER_ALB) || 28954b649f8SChris Leech (netdev->priv_flags & IFF_SLAVE_INACTIVE) || 29054b649f8SChris Leech (netdev->priv_flags & IFF_MASTER_8023AD)) { 29159d92516Sjohn fastabend FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); 29254b649f8SChris Leech return -EOPNOTSUPP; 29354b649f8SChris Leech } 29454b649f8SChris Leech 29554b649f8SChris Leech /* look for SAN MAC address, if multiple SAN MACs exist, only 29654b649f8SChris Leech * use the first one for SPMA */ 2975bab87e6SYi Zou real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ? 2985bab87e6SYi Zou vlan_dev_real_dev(netdev) : netdev; 29954b649f8SChris Leech rcu_read_lock(); 3005bab87e6SYi Zou for_each_dev_addr(real_dev, ha) { 30154b649f8SChris Leech if ((ha->type == NETDEV_HW_ADDR_T_SAN) && 302bf361707SYi Zou (is_valid_ether_addr(ha->addr))) { 30354b649f8SChris Leech memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); 30454b649f8SChris Leech fip->spma = 1; 30554b649f8SChris Leech break; 30654b649f8SChris Leech } 30754b649f8SChris Leech } 30854b649f8SChris Leech rcu_read_unlock(); 30954b649f8SChris Leech 31054b649f8SChris Leech /* setup Source Mac Address */ 31154b649f8SChris Leech if (!fip->spma) 31254b649f8SChris Leech memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); 31354b649f8SChris Leech 31454b649f8SChris Leech /* 31554b649f8SChris Leech * Add FCoE MAC address as second unicast MAC address 31654b649f8SChris Leech * or enter promiscuous mode if not capable of listening 31754b649f8SChris Leech * for multiple unicast MACs. 31854b649f8SChris Leech */ 31954b649f8SChris Leech memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); 320a748ee24SJiri Pirko dev_uc_add(netdev, flogi_maddr); 32154b649f8SChris Leech if (fip->spma) 322a748ee24SJiri Pirko dev_uc_add(netdev, fip->ctl_src_addr); 323e10f8c66SJoe Eykholt if (fip->mode == FIP_MODE_VN2VN) { 324e10f8c66SJoe Eykholt dev_mc_add(netdev, FIP_ALL_VN2VN_MACS); 325e10f8c66SJoe Eykholt dev_mc_add(netdev, FIP_ALL_P2P_MACS); 326e10f8c66SJoe Eykholt } else 32722bedad3SJiri Pirko dev_mc_add(netdev, FIP_ALL_ENODE_MACS); 32854b649f8SChris Leech 32954b649f8SChris Leech /* 33054b649f8SChris Leech * setup the receive function from ethernet driver 33154b649f8SChris Leech * on the ethertype for the given device 33254b649f8SChris Leech */ 33354b649f8SChris Leech fcoe->fcoe_packet_type.func = fcoe_rcv; 33454b649f8SChris Leech fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE); 33554b649f8SChris Leech fcoe->fcoe_packet_type.dev = netdev; 33654b649f8SChris Leech dev_add_pack(&fcoe->fcoe_packet_type); 33754b649f8SChris Leech 33854b649f8SChris Leech fcoe->fip_packet_type.func = fcoe_fip_recv; 33954b649f8SChris Leech fcoe->fip_packet_type.type = htons(ETH_P_FIP); 34054b649f8SChris Leech fcoe->fip_packet_type.dev = netdev; 34154b649f8SChris Leech dev_add_pack(&fcoe->fip_packet_type); 34254b649f8SChris Leech 34354b649f8SChris Leech return 0; 34454b649f8SChris Leech } 34554b649f8SChris Leech 346a703e490SVasu Dev /** 3471875f27eSRobert Love * fcoe_interface_create() - Create a FCoE interface on a net device 3481875f27eSRobert Love * @netdev: The net device to create the FCoE interface on 3491dd454d9SJoe Eykholt * @fip_mode: The mode to use for FIP 350030f4e00SChris Leech * 351030f4e00SChris Leech * Returns: pointer to a struct fcoe_interface or NULL on error 352030f4e00SChris Leech */ 3531dd454d9SJoe Eykholt static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev, 3541dd454d9SJoe Eykholt enum fip_state fip_mode) 355030f4e00SChris Leech { 356030f4e00SChris Leech struct fcoe_interface *fcoe; 35759d92516Sjohn fastabend int err; 358030f4e00SChris Leech 359030f4e00SChris Leech fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL); 360030f4e00SChris Leech if (!fcoe) { 361030f4e00SChris Leech FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n"); 362030f4e00SChris Leech return NULL; 363030f4e00SChris Leech } 364030f4e00SChris Leech 3652e70e241SChris Leech dev_hold(netdev); 366030f4e00SChris Leech kref_init(&fcoe->kref); 36754b649f8SChris Leech 36854b649f8SChris Leech /* 36954b649f8SChris Leech * Initialize FIP. 37054b649f8SChris Leech */ 3711dd454d9SJoe Eykholt fcoe_ctlr_init(&fcoe->ctlr, fip_mode); 37254b649f8SChris Leech fcoe->ctlr.send = fcoe_fip_send; 37354b649f8SChris Leech fcoe->ctlr.update_mac = fcoe_update_src_mac; 37411b56188SChris Leech fcoe->ctlr.get_src_addr = fcoe_get_src_mac; 37554b649f8SChris Leech 37659d92516Sjohn fastabend err = fcoe_interface_setup(fcoe, netdev); 37759d92516Sjohn fastabend if (err) { 37859d92516Sjohn fastabend fcoe_ctlr_destroy(&fcoe->ctlr); 37959d92516Sjohn fastabend kfree(fcoe); 38059d92516Sjohn fastabend dev_put(netdev); 38159d92516Sjohn fastabend return NULL; 38259d92516Sjohn fastabend } 383030f4e00SChris Leech 384030f4e00SChris Leech return fcoe; 385030f4e00SChris Leech } 386030f4e00SChris Leech 387030f4e00SChris Leech /** 3881875f27eSRobert Love * fcoe_interface_cleanup() - Clean up a FCoE interface 3891875f27eSRobert Love * @fcoe: The FCoE interface to be cleaned up 3902e70e241SChris Leech * 3912e70e241SChris Leech * Caller must be holding the RTNL mutex 39254b649f8SChris Leech */ 39354b649f8SChris Leech void fcoe_interface_cleanup(struct fcoe_interface *fcoe) 39454b649f8SChris Leech { 39554b649f8SChris Leech struct net_device *netdev = fcoe->netdev; 39654b649f8SChris Leech struct fcoe_ctlr *fip = &fcoe->ctlr; 39754b649f8SChris Leech u8 flogi_maddr[ETH_ALEN]; 398b7a727f1SYi Zou const struct net_device_ops *ops; 39954b649f8SChris Leech 40054b649f8SChris Leech /* 40154b649f8SChris Leech * Don't listen for Ethernet packets anymore. 40254b649f8SChris Leech * synchronize_net() ensures that the packet handlers are not running 40354b649f8SChris Leech * on another CPU. dev_remove_pack() would do that, this calls the 40454b649f8SChris Leech * unsyncronized version __dev_remove_pack() to avoid multiple delays. 40554b649f8SChris Leech */ 40654b649f8SChris Leech __dev_remove_pack(&fcoe->fcoe_packet_type); 40754b649f8SChris Leech __dev_remove_pack(&fcoe->fip_packet_type); 40854b649f8SChris Leech synchronize_net(); 40954b649f8SChris Leech 41054b649f8SChris Leech /* Delete secondary MAC addresses */ 41154b649f8SChris Leech memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); 412a748ee24SJiri Pirko dev_uc_del(netdev, flogi_maddr); 41354b649f8SChris Leech if (fip->spma) 414a748ee24SJiri Pirko dev_uc_del(netdev, fip->ctl_src_addr); 415e10f8c66SJoe Eykholt if (fip->mode == FIP_MODE_VN2VN) { 416e10f8c66SJoe Eykholt dev_mc_del(netdev, FIP_ALL_VN2VN_MACS); 417e10f8c66SJoe Eykholt dev_mc_del(netdev, FIP_ALL_P2P_MACS); 418e10f8c66SJoe Eykholt } else 41922bedad3SJiri Pirko dev_mc_del(netdev, FIP_ALL_ENODE_MACS); 420b7a727f1SYi Zou 421b7a727f1SYi Zou /* Tell the LLD we are done w/ FCoE */ 422b7a727f1SYi Zou ops = netdev->netdev_ops; 423b7a727f1SYi Zou if (ops->ndo_fcoe_disable) { 424b7a727f1SYi Zou if (ops->ndo_fcoe_disable(netdev)) 425b7a727f1SYi Zou FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" 426b7a727f1SYi Zou " specific feature for LLD.\n"); 427b7a727f1SYi Zou } 42854b649f8SChris Leech } 42954b649f8SChris Leech 43054b649f8SChris Leech /** 431030f4e00SChris Leech * fcoe_interface_release() - fcoe_port kref release function 4321875f27eSRobert Love * @kref: Embedded reference count in an fcoe_interface struct 433030f4e00SChris Leech */ 434030f4e00SChris Leech static void fcoe_interface_release(struct kref *kref) 435030f4e00SChris Leech { 436030f4e00SChris Leech struct fcoe_interface *fcoe; 4372e70e241SChris Leech struct net_device *netdev; 438030f4e00SChris Leech 439030f4e00SChris Leech fcoe = container_of(kref, struct fcoe_interface, kref); 4402e70e241SChris Leech netdev = fcoe->netdev; 4412e70e241SChris Leech /* tear-down the FCoE controller */ 4422e70e241SChris Leech fcoe_ctlr_destroy(&fcoe->ctlr); 443030f4e00SChris Leech kfree(fcoe); 4442e70e241SChris Leech dev_put(netdev); 445030f4e00SChris Leech } 446030f4e00SChris Leech 447030f4e00SChris Leech /** 4481875f27eSRobert Love * fcoe_interface_get() - Get a reference to a FCoE interface 4491875f27eSRobert Love * @fcoe: The FCoE interface to be held 450030f4e00SChris Leech */ 451030f4e00SChris Leech static inline void fcoe_interface_get(struct fcoe_interface *fcoe) 452030f4e00SChris Leech { 453030f4e00SChris Leech kref_get(&fcoe->kref); 454030f4e00SChris Leech } 455030f4e00SChris Leech 456030f4e00SChris Leech /** 4571875f27eSRobert Love * fcoe_interface_put() - Put a reference to a FCoE interface 4581875f27eSRobert Love * @fcoe: The FCoE interface to be released 459030f4e00SChris Leech */ 460030f4e00SChris Leech static inline void fcoe_interface_put(struct fcoe_interface *fcoe) 461030f4e00SChris Leech { 462030f4e00SChris Leech kref_put(&fcoe->kref, fcoe_interface_release); 463030f4e00SChris Leech } 464030f4e00SChris Leech 465030f4e00SChris Leech /** 4661875f27eSRobert Love * fcoe_fip_recv() - Handler for received FIP frames 4671875f27eSRobert Love * @skb: The receive skb 4681875f27eSRobert Love * @netdev: The associated net device 4691875f27eSRobert Love * @ptype: The packet_type structure which was used to register this handler 4701875f27eSRobert Love * @orig_dev: The original net_device the the skb was received on. 4711875f27eSRobert Love * (in case dev is a bond) 472ab6b85c1SVasu Dev * 473ab6b85c1SVasu Dev * Returns: 0 for success 474ab6b85c1SVasu Dev */ 4751875f27eSRobert Love static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, 476ab6b85c1SVasu Dev struct packet_type *ptype, 477ab6b85c1SVasu Dev struct net_device *orig_dev) 478ab6b85c1SVasu Dev { 479259ad85dSChris Leech struct fcoe_interface *fcoe; 480ab6b85c1SVasu Dev 481259ad85dSChris Leech fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); 4823fe9a0baSChris Leech fcoe_ctlr_recv(&fcoe->ctlr, skb); 483ab6b85c1SVasu Dev return 0; 484ab6b85c1SVasu Dev } 485ab6b85c1SVasu Dev 486ab6b85c1SVasu Dev /** 4871875f27eSRobert Love * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame 4881875f27eSRobert Love * @fip: The FCoE controller 4891875f27eSRobert Love * @skb: The FIP packet to be sent 490ab6b85c1SVasu Dev */ 491ab6b85c1SVasu Dev static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) 492ab6b85c1SVasu Dev { 4933fe9a0baSChris Leech skb->dev = fcoe_from_ctlr(fip)->netdev; 494ab6b85c1SVasu Dev dev_queue_xmit(skb); 495ab6b85c1SVasu Dev } 496ab6b85c1SVasu Dev 497ab6b85c1SVasu Dev /** 4981875f27eSRobert Love * fcoe_update_src_mac() - Update the Ethernet MAC filters 4991875f27eSRobert Love * @lport: The local port to update the source MAC on 5001875f27eSRobert Love * @addr: Unicast MAC address to add 501ab6b85c1SVasu Dev * 502ab6b85c1SVasu Dev * Remove any previously-set unicast MAC filter. 503ab6b85c1SVasu Dev * Add secondary FCoE MAC address filter for our OUI. 504ab6b85c1SVasu Dev */ 50511b56188SChris Leech static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) 506ab6b85c1SVasu Dev { 50711b56188SChris Leech struct fcoe_port *port = lport_priv(lport); 50811b56188SChris Leech struct fcoe_interface *fcoe = port->fcoe; 509ab6b85c1SVasu Dev 510ab6b85c1SVasu Dev rtnl_lock(); 51111b56188SChris Leech if (!is_zero_ether_addr(port->data_src_addr)) 512a748ee24SJiri Pirko dev_uc_del(fcoe->netdev, port->data_src_addr); 51311b56188SChris Leech if (!is_zero_ether_addr(addr)) 514a748ee24SJiri Pirko dev_uc_add(fcoe->netdev, addr); 51511b56188SChris Leech memcpy(port->data_src_addr, addr, ETH_ALEN); 516ab6b85c1SVasu Dev rtnl_unlock(); 517ab6b85c1SVasu Dev } 518ab6b85c1SVasu Dev 519ab6b85c1SVasu Dev /** 52011b56188SChris Leech * fcoe_get_src_mac() - return the Ethernet source address for an lport 52111b56188SChris Leech * @lport: libfc lport 52211b56188SChris Leech */ 52311b56188SChris Leech static u8 *fcoe_get_src_mac(struct fc_lport *lport) 52411b56188SChris Leech { 52511b56188SChris Leech struct fcoe_port *port = lport_priv(lport); 52611b56188SChris Leech 52711b56188SChris Leech return port->data_src_addr; 52811b56188SChris Leech } 52911b56188SChris Leech 53011b56188SChris Leech /** 5311875f27eSRobert Love * fcoe_lport_config() - Set up a local port 5321875f27eSRobert Love * @lport: The local port to be setup 533a703e490SVasu Dev * 534a703e490SVasu Dev * Returns: 0 for success 535a703e490SVasu Dev */ 5361875f27eSRobert Love static int fcoe_lport_config(struct fc_lport *lport) 537a703e490SVasu Dev { 5381875f27eSRobert Love lport->link_up = 0; 5391875f27eSRobert Love lport->qfull = 0; 5401875f27eSRobert Love lport->max_retry_count = 3; 5411875f27eSRobert Love lport->max_rport_retry_count = 3; 5421875f27eSRobert Love lport->e_d_tov = 2 * 1000; /* FC-FS default */ 5431875f27eSRobert Love lport->r_a_tov = 2 * 2 * 1000; 5441875f27eSRobert Love lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | 545a703e490SVasu Dev FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); 5461875f27eSRobert Love lport->does_npiv = 1; 547a703e490SVasu Dev 5481875f27eSRobert Love fc_lport_init_stats(lport); 549a703e490SVasu Dev 550a703e490SVasu Dev /* lport fc_lport related configuration */ 5511875f27eSRobert Love fc_lport_config(lport); 552a703e490SVasu Dev 553a703e490SVasu Dev /* offload related configuration */ 5541875f27eSRobert Love lport->crc_offload = 0; 5551875f27eSRobert Love lport->seq_offload = 0; 5561875f27eSRobert Love lport->lro_enabled = 0; 5571875f27eSRobert Love lport->lro_xid = 0; 5581875f27eSRobert Love lport->lso_max = 0; 559a703e490SVasu Dev 560a703e490SVasu Dev return 0; 561a703e490SVasu Dev } 562a703e490SVasu Dev 563a703e490SVasu Dev /** 5641875f27eSRobert Love * fcoe_queue_timer() - The fcoe queue timer 5651875f27eSRobert Love * @lport: The local port 5661047f221SVasu Dev * 5671047f221SVasu Dev * Calls fcoe_check_wait_queue on timeout 5681047f221SVasu Dev */ 5691875f27eSRobert Love static void fcoe_queue_timer(ulong lport) 5701047f221SVasu Dev { 5711875f27eSRobert Love fcoe_check_wait_queue((struct fc_lport *)lport, NULL); 5721047f221SVasu Dev } 5731047f221SVasu Dev 5741047f221SVasu Dev /** 575dcece412SYi Zou * fcoe_get_wwn() - Get the world wide name from LLD if it supports it 576dcece412SYi Zou * @netdev: the associated net device 577dcece412SYi Zou * @wwn: the output WWN 578dcece412SYi Zou * @type: the type of WWN (WWPN or WWNN) 579dcece412SYi Zou * 580dcece412SYi Zou * Returns: 0 for success 581dcece412SYi Zou */ 582dcece412SYi Zou static int fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type) 583dcece412SYi Zou { 584dcece412SYi Zou const struct net_device_ops *ops = netdev->netdev_ops; 585dcece412SYi Zou 586dcece412SYi Zou if (ops->ndo_fcoe_get_wwn) 587dcece412SYi Zou return ops->ndo_fcoe_get_wwn(netdev, wwn, type); 588dcece412SYi Zou return -EINVAL; 589dcece412SYi Zou } 590dcece412SYi Zou 591dcece412SYi Zou /** 59254a5b21dSYi Zou * fcoe_netdev_features_change - Updates the lport's offload flags based 59354a5b21dSYi Zou * on the LLD netdev's FCoE feature flags 59454a5b21dSYi Zou */ 59554a5b21dSYi Zou static void fcoe_netdev_features_change(struct fc_lport *lport, 59654a5b21dSYi Zou struct net_device *netdev) 59754a5b21dSYi Zou { 59854a5b21dSYi Zou mutex_lock(&lport->lp_mutex); 59954a5b21dSYi Zou 60054a5b21dSYi Zou if (netdev->features & NETIF_F_SG) 60154a5b21dSYi Zou lport->sg_supp = 1; 60254a5b21dSYi Zou else 60354a5b21dSYi Zou lport->sg_supp = 0; 60454a5b21dSYi Zou 60554a5b21dSYi Zou if (netdev->features & NETIF_F_FCOE_CRC) { 60654a5b21dSYi Zou lport->crc_offload = 1; 60754a5b21dSYi Zou FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); 60854a5b21dSYi Zou } else { 60954a5b21dSYi Zou lport->crc_offload = 0; 61054a5b21dSYi Zou } 61154a5b21dSYi Zou 61254a5b21dSYi Zou if (netdev->features & NETIF_F_FSO) { 61354a5b21dSYi Zou lport->seq_offload = 1; 61454a5b21dSYi Zou lport->lso_max = netdev->gso_max_size; 61554a5b21dSYi Zou FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", 61654a5b21dSYi Zou lport->lso_max); 61754a5b21dSYi Zou } else { 61854a5b21dSYi Zou lport->seq_offload = 0; 61954a5b21dSYi Zou lport->lso_max = 0; 62054a5b21dSYi Zou } 62154a5b21dSYi Zou 62254a5b21dSYi Zou if (netdev->fcoe_ddp_xid) { 62354a5b21dSYi Zou lport->lro_enabled = 1; 62454a5b21dSYi Zou lport->lro_xid = netdev->fcoe_ddp_xid; 62554a5b21dSYi Zou FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", 62654a5b21dSYi Zou lport->lro_xid); 62754a5b21dSYi Zou } else { 62854a5b21dSYi Zou lport->lro_enabled = 0; 62954a5b21dSYi Zou lport->lro_xid = 0; 63054a5b21dSYi Zou } 63154a5b21dSYi Zou 63254a5b21dSYi Zou mutex_unlock(&lport->lp_mutex); 63354a5b21dSYi Zou } 63454a5b21dSYi Zou 63554a5b21dSYi Zou /** 6361875f27eSRobert Love * fcoe_netdev_config() - Set up net devive for SW FCoE 6371875f27eSRobert Love * @lport: The local port that is associated with the net device 6381875f27eSRobert Love * @netdev: The associated net device 639a703e490SVasu Dev * 6401875f27eSRobert Love * Must be called after fcoe_lport_config() as it will use local port mutex 641a703e490SVasu Dev * 642a703e490SVasu Dev * Returns: 0 for success 643a703e490SVasu Dev */ 6441875f27eSRobert Love static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) 645a703e490SVasu Dev { 646a703e490SVasu Dev u32 mfs; 647a703e490SVasu Dev u64 wwnn, wwpn; 64825024989SChris Leech struct fcoe_interface *fcoe; 649014f5c3fSChris Leech struct fcoe_port *port; 650a703e490SVasu Dev 651a703e490SVasu Dev /* Setup lport private data to point to fcoe softc */ 6521875f27eSRobert Love port = lport_priv(lport); 65325024989SChris Leech fcoe = port->fcoe; 654a703e490SVasu Dev 655a703e490SVasu Dev /* 656a703e490SVasu Dev * Determine max frame size based on underlying device and optional 657a703e490SVasu Dev * user-configured limit. If the MFS is too low, fcoe_link_ok() 658a703e490SVasu Dev * will return 0, so do this first. 659a703e490SVasu Dev */ 6607221d7e5SYi Zou mfs = netdev->mtu; 6617221d7e5SYi Zou if (netdev->features & NETIF_F_FCOE_MTU) { 6627221d7e5SYi Zou mfs = FCOE_MTU; 6637221d7e5SYi Zou FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); 6647221d7e5SYi Zou } 6657221d7e5SYi Zou mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); 6661875f27eSRobert Love if (fc_set_mfs(lport, mfs)) 667a703e490SVasu Dev return -EINVAL; 668a703e490SVasu Dev 669a703e490SVasu Dev /* offload features support */ 67054a5b21dSYi Zou fcoe_netdev_features_change(lport, netdev); 671a703e490SVasu Dev 672014f5c3fSChris Leech skb_queue_head_init(&port->fcoe_pending_queue); 673014f5c3fSChris Leech port->fcoe_pending_queue_active = 0; 6741875f27eSRobert Love setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport); 675a703e490SVasu Dev 6765e4f8fe7SRobert Love fcoe_link_speed_update(lport); 6775e4f8fe7SRobert Love 6781875f27eSRobert Love if (!lport->vport) { 679dcece412SYi Zou if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN)) 68075ea89efSYi Zou wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0); 6811875f27eSRobert Love fc_set_wwnn(lport, wwnn); 682dcece412SYi Zou if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN)) 683dcece412SYi Zou wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 684cf4aebcaSVasu Dev 2, 0); 6851875f27eSRobert Love fc_set_wwpn(lport, wwpn); 6869a05753bSChris Leech } 687a703e490SVasu Dev 688a703e490SVasu Dev return 0; 689a703e490SVasu Dev } 690a703e490SVasu Dev 691a703e490SVasu Dev /** 6921875f27eSRobert Love * fcoe_shost_config() - Set up the SCSI host associated with a local port 6931875f27eSRobert Love * @lport: The local port 6941875f27eSRobert Love * @dev: The device associated with the SCSI host 695a703e490SVasu Dev * 696a703e490SVasu Dev * Must be called after fcoe_lport_config() and fcoe_netdev_config() 697a703e490SVasu Dev * 698a703e490SVasu Dev * Returns: 0 for success 699a703e490SVasu Dev */ 7008ba00a4bSVasu Dev static int fcoe_shost_config(struct fc_lport *lport, struct device *dev) 701a703e490SVasu Dev { 702a703e490SVasu Dev int rc = 0; 703a703e490SVasu Dev 704a703e490SVasu Dev /* lport scsi host config */ 7051875f27eSRobert Love lport->host->max_lun = FCOE_MAX_LUN; 7061875f27eSRobert Love lport->host->max_id = FCOE_MAX_FCP_TARGET; 7071875f27eSRobert Love lport->host->max_channel = 0; 708da87bfabSVasu Dev lport->host->max_cmd_len = FCOE_MAX_CMD_LEN; 709da87bfabSVasu Dev 7101875f27eSRobert Love if (lport->vport) 7111875f27eSRobert Love lport->host->transportt = fcoe_vport_transport_template; 712e9084bb8SChris Leech else 7131875f27eSRobert Love lport->host->transportt = fcoe_transport_template; 714a703e490SVasu Dev 715a703e490SVasu Dev /* add the new host to the SCSI-ml */ 7161875f27eSRobert Love rc = scsi_add_host(lport->host, dev); 717a703e490SVasu Dev if (rc) { 7181875f27eSRobert Love FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " 719d5488eb9SRobert Love "error on scsi_add_host\n"); 720a703e490SVasu Dev return rc; 721a703e490SVasu Dev } 7229a05753bSChris Leech 7231875f27eSRobert Love if (!lport->vport) 7244be929beSAlexey Dobriyan fc_host_max_npiv_vports(lport->host) = USHRT_MAX; 7259a05753bSChris Leech 7261875f27eSRobert Love snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, 7275baa17c3SChris Leech "%s v%s over %s", FCOE_NAME, FCOE_VERSION, 7281875f27eSRobert Love fcoe_netdev(lport)->name); 729a703e490SVasu Dev 730a703e490SVasu Dev return 0; 731a703e490SVasu Dev } 732a703e490SVasu Dev 7331875f27eSRobert Love /** 7341875f27eSRobert Love * fcoe_oem_match() - The match routine for the offloaded exchange manager 7351875f27eSRobert Love * @fp: The I/O frame 736d7179680SVasu Dev * 7371875f27eSRobert Love * This routine will be associated with an exchange manager (EM). When 7381875f27eSRobert Love * the libfc exchange handling code is looking for an EM to use it will 7391875f27eSRobert Love * call this routine and pass it the frame that it wishes to send. This 7401875f27eSRobert Love * routine will return True if the associated EM is to be used and False 7411875f27eSRobert Love * if the echange code should continue looking for an EM. 7421875f27eSRobert Love * 7431875f27eSRobert Love * The offload EM that this routine is associated with will handle any 7441875f27eSRobert Love * packets that are for SCSI read requests. 7451875f27eSRobert Love * 7461875f27eSRobert Love * Returns: True for read types I/O, otherwise returns false. 747d7179680SVasu Dev */ 748d7179680SVasu Dev bool fcoe_oem_match(struct fc_frame *fp) 749d7179680SVasu Dev { 75005cc7390SYi Zou return fc_fcp_is_read(fr_fsp(fp)) && 75105cc7390SYi Zou (fr_fsp(fp)->data_len > fcoe_ddp_min); 752d7179680SVasu Dev } 753d7179680SVasu Dev 754a703e490SVasu Dev /** 7551875f27eSRobert Love * fcoe_em_config() - Allocate and configure an exchange manager 7561875f27eSRobert Love * @lport: The local port that the new EM will be associated with 757a703e490SVasu Dev * 758a703e490SVasu Dev * Returns: 0 on success 759a703e490SVasu Dev */ 7601875f27eSRobert Love static inline int fcoe_em_config(struct fc_lport *lport) 761a703e490SVasu Dev { 7621875f27eSRobert Love struct fcoe_port *port = lport_priv(lport); 76325024989SChris Leech struct fcoe_interface *fcoe = port->fcoe; 76425024989SChris Leech struct fcoe_interface *oldfcoe = NULL; 7651d1b88dcSVasu Dev struct net_device *old_real_dev, *cur_real_dev; 766d7179680SVasu Dev u16 min_xid = FCOE_MIN_XID; 767d7179680SVasu Dev u16 max_xid = FCOE_MAX_XID; 768d7179680SVasu Dev 769d7179680SVasu Dev /* 770d7179680SVasu Dev * Check if need to allocate an em instance for 771d7179680SVasu Dev * offload exchange ids to be shared across all VN_PORTs/lport. 772d7179680SVasu Dev */ 7731875f27eSRobert Love if (!lport->lro_enabled || !lport->lro_xid || 7741875f27eSRobert Love (lport->lro_xid >= max_xid)) { 7751875f27eSRobert Love lport->lro_xid = 0; 776d7179680SVasu Dev goto skip_oem; 777d7179680SVasu Dev } 778d7179680SVasu Dev 779d7179680SVasu Dev /* 780d7179680SVasu Dev * Reuse existing offload em instance in case 7811d1b88dcSVasu Dev * it is already allocated on real eth device 782d7179680SVasu Dev */ 78325024989SChris Leech if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) 78425024989SChris Leech cur_real_dev = vlan_dev_real_dev(fcoe->netdev); 7851d1b88dcSVasu Dev else 78625024989SChris Leech cur_real_dev = fcoe->netdev; 7871d1b88dcSVasu Dev 78825024989SChris Leech list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { 78925024989SChris Leech if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) 79025024989SChris Leech old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); 7911d1b88dcSVasu Dev else 79225024989SChris Leech old_real_dev = oldfcoe->netdev; 7931d1b88dcSVasu Dev 7941d1b88dcSVasu Dev if (cur_real_dev == old_real_dev) { 795991cbb60SChris Leech fcoe->oem = oldfcoe->oem; 796d7179680SVasu Dev break; 797d7179680SVasu Dev } 798d7179680SVasu Dev } 799d7179680SVasu Dev 800991cbb60SChris Leech if (fcoe->oem) { 8011875f27eSRobert Love if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { 802d7179680SVasu Dev printk(KERN_ERR "fcoe_em_config: failed to add " 803d7179680SVasu Dev "offload em:%p on interface:%s\n", 804991cbb60SChris Leech fcoe->oem, fcoe->netdev->name); 805a703e490SVasu Dev return -ENOMEM; 806d7179680SVasu Dev } 807d7179680SVasu Dev } else { 8081875f27eSRobert Love fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, 8091875f27eSRobert Love FCOE_MIN_XID, lport->lro_xid, 810d7179680SVasu Dev fcoe_oem_match); 811991cbb60SChris Leech if (!fcoe->oem) { 812d7179680SVasu Dev printk(KERN_ERR "fcoe_em_config: failed to allocate " 813d7179680SVasu Dev "em for offload exches on interface:%s\n", 81425024989SChris Leech fcoe->netdev->name); 815d7179680SVasu Dev return -ENOMEM; 816d7179680SVasu Dev } 817d7179680SVasu Dev } 818d7179680SVasu Dev 819d7179680SVasu Dev /* 820d7179680SVasu Dev * Exclude offload EM xid range from next EM xid range. 821d7179680SVasu Dev */ 8221875f27eSRobert Love min_xid += lport->lro_xid + 1; 823d7179680SVasu Dev 824d7179680SVasu Dev skip_oem: 8251875f27eSRobert Love if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { 826d7179680SVasu Dev printk(KERN_ERR "fcoe_em_config: failed to " 82725024989SChris Leech "allocate em on interface %s\n", fcoe->netdev->name); 828d7179680SVasu Dev return -ENOMEM; 829d7179680SVasu Dev } 830a703e490SVasu Dev 831a703e490SVasu Dev return 0; 832a703e490SVasu Dev } 833a703e490SVasu Dev 834a703e490SVasu Dev /** 8351875f27eSRobert Love * fcoe_if_destroy() - Tear down a SW FCoE instance 8361875f27eSRobert Love * @lport: The local port to be destroyed 83734ce27bcSVasu Dev * 83834ce27bcSVasu Dev * Locking: must be called with the RTNL mutex held and RTNL mutex 83934ce27bcSVasu Dev * needed to be dropped by this function since not dropping RTNL 84034ce27bcSVasu Dev * would cause circular locking warning on synchronous fip worker 84134ce27bcSVasu Dev * cancelling thru fcoe_interface_put invoked by this function. 84234ce27bcSVasu Dev * 843a703e490SVasu Dev */ 844af7f85d9SChris Leech static void fcoe_if_destroy(struct fc_lport *lport) 845a703e490SVasu Dev { 846014f5c3fSChris Leech struct fcoe_port *port = lport_priv(lport); 847014f5c3fSChris Leech struct fcoe_interface *fcoe = port->fcoe; 84825024989SChris Leech struct net_device *netdev = fcoe->netdev; 849a703e490SVasu Dev 850d5488eb9SRobert Love FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); 851a703e490SVasu Dev 852a703e490SVasu Dev /* Logout of the fabric */ 853af7f85d9SChris Leech fc_fabric_logoff(lport); 854a703e490SVasu Dev 855a703e490SVasu Dev /* Cleanup the fc_lport */ 856af7f85d9SChris Leech fc_lport_destroy(lport); 857a703e490SVasu Dev 85854b649f8SChris Leech /* Stop the transmit retry timer */ 85954b649f8SChris Leech del_timer_sync(&port->timer); 86054b649f8SChris Leech 86154b649f8SChris Leech /* Free existing transmit skbs */ 86254b649f8SChris Leech fcoe_clean_pending_queue(lport); 86354b649f8SChris Leech 86411b56188SChris Leech if (!is_zero_ether_addr(port->data_src_addr)) 865a748ee24SJiri Pirko dev_uc_del(netdev, port->data_src_addr); 86611b56188SChris Leech rtnl_unlock(); 86711b56188SChris Leech 86854b649f8SChris Leech /* receives may not be stopped until after this */ 86954b649f8SChris Leech fcoe_interface_put(fcoe); 87054b649f8SChris Leech 87154b649f8SChris Leech /* Free queued packets for the per-CPU receive threads */ 87254b649f8SChris Leech fcoe_percpu_clean(lport); 87354b649f8SChris Leech 874a703e490SVasu Dev /* Detach from the scsi-ml */ 875af7f85d9SChris Leech fc_remove_host(lport->host); 876af7f85d9SChris Leech scsi_remove_host(lport->host); 877a703e490SVasu Dev 87880e736f8SYi Zou /* Destroy lport scsi_priv */ 87980e736f8SYi Zou fc_fcp_destroy(lport); 88080e736f8SYi Zou 881a703e490SVasu Dev /* There are no more rports or I/O, free the EM */ 882af7f85d9SChris Leech fc_exch_mgr_free(lport); 883a703e490SVasu Dev 884a703e490SVasu Dev /* Free memory used by statistical counters */ 885af7f85d9SChris Leech fc_lport_free_stats(lport); 886a703e490SVasu Dev 8872e70e241SChris Leech /* Release the Scsi_Host */ 888af7f85d9SChris Leech scsi_host_put(lport->host); 88915af974dSVasu Dev module_put(THIS_MODULE); 890a703e490SVasu Dev } 891a703e490SVasu Dev 8921875f27eSRobert Love /** 8931875f27eSRobert Love * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device 8941875f27eSRobert Love * @lport: The local port to setup DDP for 8951875f27eSRobert Love * @xid: The exchange ID for this DDP transfer 8961875f27eSRobert Love * @sgl: The scatterlist describing this transfer 8971875f27eSRobert Love * @sgc: The number of sg items 898a703e490SVasu Dev * 8991875f27eSRobert Love * Returns: 0 if the DDP context was not configured 900a703e490SVasu Dev */ 9011875f27eSRobert Love static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, 902a703e490SVasu Dev struct scatterlist *sgl, unsigned int sgc) 903a703e490SVasu Dev { 9041875f27eSRobert Love struct net_device *netdev = fcoe_netdev(lport); 905a703e490SVasu Dev 9061875f27eSRobert Love if (netdev->netdev_ops->ndo_fcoe_ddp_setup) 9071875f27eSRobert Love return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, 9081875f27eSRobert Love xid, sgl, 9091875f27eSRobert Love sgc); 910a703e490SVasu Dev 911a703e490SVasu Dev return 0; 912a703e490SVasu Dev } 913a703e490SVasu Dev 914a703e490SVasu Dev /** 9151875f27eSRobert Love * fcoe_ddp_done() - Call a LLD's ddp_done through the net device 9161875f27eSRobert Love * @lport: The local port to complete DDP on 9171875f27eSRobert Love * @xid: The exchange ID for this DDP transfer 918a703e490SVasu Dev * 9191875f27eSRobert Love * Returns: the length of data that have been completed by DDP 9201875f27eSRobert Love */ 9211875f27eSRobert Love static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) 9221875f27eSRobert Love { 9231875f27eSRobert Love struct net_device *netdev = fcoe_netdev(lport); 9241875f27eSRobert Love 9251875f27eSRobert Love if (netdev->netdev_ops->ndo_fcoe_ddp_done) 9261875f27eSRobert Love return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); 9271875f27eSRobert Love return 0; 9281875f27eSRobert Love } 9291875f27eSRobert Love 9301875f27eSRobert Love /** 9311875f27eSRobert Love * fcoe_if_create() - Create a FCoE instance on an interface 9321875f27eSRobert Love * @fcoe: The FCoE interface to create a local port on 9331875f27eSRobert Love * @parent: The device pointer to be the parent in sysfs for the SCSI host 9341875f27eSRobert Love * @npiv: Indicates if the port is a vport or not 9351875f27eSRobert Love * 9361875f27eSRobert Love * Creates a fc_lport instance and a Scsi_Host instance and configure them. 937a703e490SVasu Dev * 938af7f85d9SChris Leech * Returns: The allocated fc_lport or an error pointer 939a703e490SVasu Dev */ 940030f4e00SChris Leech static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, 9419a05753bSChris Leech struct device *parent, int npiv) 942a703e490SVasu Dev { 9431875f27eSRobert Love struct net_device *netdev = fcoe->netdev; 944af7f85d9SChris Leech struct fc_lport *lport = NULL; 945014f5c3fSChris Leech struct fcoe_port *port; 9461875f27eSRobert Love int rc; 9479a05753bSChris Leech /* 9489a05753bSChris Leech * parent is only a vport if npiv is 1, 9499a05753bSChris Leech * but we'll only use vport in that case so go ahead and set it 9509a05753bSChris Leech */ 9519a05753bSChris Leech struct fc_vport *vport = dev_to_vport(parent); 952a703e490SVasu Dev 953d5488eb9SRobert Love FCOE_NETDEV_DBG(netdev, "Create Interface\n"); 954a703e490SVasu Dev 9559a05753bSChris Leech if (!npiv) { 95686221969SChris Leech lport = libfc_host_alloc(&fcoe_shost_template, 957014f5c3fSChris Leech sizeof(struct fcoe_port)); 9589a05753bSChris Leech } else { 9599a05753bSChris Leech lport = libfc_vport_create(vport, 9609a05753bSChris Leech sizeof(struct fcoe_port)); 9619a05753bSChris Leech } 96286221969SChris Leech if (!lport) { 963014f5c3fSChris Leech FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); 964014f5c3fSChris Leech rc = -ENOMEM; 965030f4e00SChris Leech goto out; 966014f5c3fSChris Leech } 967014f5c3fSChris Leech port = lport_priv(lport); 9682e70e241SChris Leech port->lport = lport; 969014f5c3fSChris Leech port->fcoe = fcoe; 9702e70e241SChris Leech INIT_WORK(&port->destroy_work, fcoe_destroy_work); 971a703e490SVasu Dev 9721875f27eSRobert Love /* configure a fc_lport including the exchange manager */ 973af7f85d9SChris Leech rc = fcoe_lport_config(lport); 974a703e490SVasu Dev if (rc) { 975d5488eb9SRobert Love FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " 976d5488eb9SRobert Love "interface\n"); 977a703e490SVasu Dev goto out_host_put; 978a703e490SVasu Dev } 979a703e490SVasu Dev 9809a05753bSChris Leech if (npiv) { 9819f8f3aa6SChris Leech FCOE_NETDEV_DBG(netdev, "Setting vport names, " 9829f8f3aa6SChris Leech "%16.16llx %16.16llx\n", 9839a05753bSChris Leech vport->node_name, vport->port_name); 9849a05753bSChris Leech fc_set_wwnn(lport, vport->node_name); 9859a05753bSChris Leech fc_set_wwpn(lport, vport->port_name); 9869a05753bSChris Leech } 9879a05753bSChris Leech 988ab6b85c1SVasu Dev /* configure lport network properties */ 989af7f85d9SChris Leech rc = fcoe_netdev_config(lport, netdev); 990ab6b85c1SVasu Dev if (rc) { 991d5488eb9SRobert Love FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " 992d5488eb9SRobert Love "interface\n"); 99354b649f8SChris Leech goto out_lp_destroy; 994ab6b85c1SVasu Dev } 99597c8389dSJoe Eykholt 996a703e490SVasu Dev /* configure lport scsi host properties */ 9978ba00a4bSVasu Dev rc = fcoe_shost_config(lport, parent); 998a703e490SVasu Dev if (rc) { 999d5488eb9SRobert Love FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " 1000d5488eb9SRobert Love "interface\n"); 100154b649f8SChris Leech goto out_lp_destroy; 1002a703e490SVasu Dev } 1003a703e490SVasu Dev 1004a703e490SVasu Dev /* Initialize the library */ 1005e10f8c66SJoe Eykholt rc = fcoe_libfc_config(lport, &fcoe->ctlr, &fcoe_libfc_fcn_templ, 1); 1006a703e490SVasu Dev if (rc) { 1007d5488eb9SRobert Love FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " 1008d5488eb9SRobert Love "interface\n"); 1009a703e490SVasu Dev goto out_lp_destroy; 1010a703e490SVasu Dev } 1011a703e490SVasu Dev 10129a05753bSChris Leech if (!npiv) { 1013e8af4d43SVasu Dev /* 1014e8af4d43SVasu Dev * fcoe_em_alloc() and fcoe_hostlist_add() both 10159a05753bSChris Leech * need to be atomic with respect to other changes to the 10169a05753bSChris Leech * hostlist since fcoe_em_alloc() looks for an existing EM 1017e8af4d43SVasu Dev * instance on host list updated by fcoe_hostlist_add(). 1018c863df33SChris Leech * 10199a05753bSChris Leech * This is currently handled through the fcoe_config_mutex 10209a05753bSChris Leech * begin held. 1021e8af4d43SVasu Dev */ 1022c863df33SChris Leech 102396316099SVasu Dev /* lport exch manager allocation */ 1024af7f85d9SChris Leech rc = fcoe_em_config(lport); 102596316099SVasu Dev if (rc) { 10269a05753bSChris Leech FCOE_NETDEV_DBG(netdev, "Could not configure the EM " 10279a05753bSChris Leech "for the interface\n"); 102896316099SVasu Dev goto out_lp_destroy; 102996316099SVasu Dev } 10309a05753bSChris Leech } 103196316099SVasu Dev 1032030f4e00SChris Leech fcoe_interface_get(fcoe); 1033af7f85d9SChris Leech return lport; 1034a703e490SVasu Dev 1035a703e490SVasu Dev out_lp_destroy: 1036af7f85d9SChris Leech fc_exch_mgr_free(lport); 1037a703e490SVasu Dev out_host_put: 1038af7f85d9SChris Leech scsi_host_put(lport->host); 1039af7f85d9SChris Leech out: 1040af7f85d9SChris Leech return ERR_PTR(rc); 1041a703e490SVasu Dev } 1042a703e490SVasu Dev 1043a703e490SVasu Dev /** 10441875f27eSRobert Love * fcoe_if_init() - Initialization routine for fcoe.ko 10451875f27eSRobert Love * 10461875f27eSRobert Love * Attaches the SW FCoE transport to the FC transport 1047a703e490SVasu Dev * 1048a703e490SVasu Dev * Returns: 0 on success 1049a703e490SVasu Dev */ 1050a703e490SVasu Dev static int __init fcoe_if_init(void) 1051a703e490SVasu Dev { 1052a703e490SVasu Dev /* attach to scsi transport */ 1053e9084bb8SChris Leech fcoe_transport_template = fc_attach_transport(&fcoe_transport_function); 1054e9084bb8SChris Leech fcoe_vport_transport_template = 1055e9084bb8SChris Leech fc_attach_transport(&fcoe_vport_transport_function); 1056a703e490SVasu Dev 1057e9084bb8SChris Leech if (!fcoe_transport_template) { 1058d5488eb9SRobert Love printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); 1059a703e490SVasu Dev return -ENODEV; 1060a703e490SVasu Dev } 1061a703e490SVasu Dev 1062a703e490SVasu Dev return 0; 1063a703e490SVasu Dev } 1064a703e490SVasu Dev 1065a703e490SVasu Dev /** 10661875f27eSRobert Love * fcoe_if_exit() - Tear down fcoe.ko 10671875f27eSRobert Love * 10681875f27eSRobert Love * Detaches the SW FCoE transport from the FC transport 1069a703e490SVasu Dev * 1070a703e490SVasu Dev * Returns: 0 on success 1071a703e490SVasu Dev */ 1072a703e490SVasu Dev int __exit fcoe_if_exit(void) 1073a703e490SVasu Dev { 1074e9084bb8SChris Leech fc_release_transport(fcoe_transport_template); 1075e9084bb8SChris Leech fc_release_transport(fcoe_vport_transport_template); 1076e9084bb8SChris Leech fcoe_transport_template = NULL; 1077e9084bb8SChris Leech fcoe_vport_transport_template = NULL; 1078a703e490SVasu Dev return 0; 1079a703e490SVasu Dev } 1080a703e490SVasu Dev 1081a703e490SVasu Dev /** 10821875f27eSRobert Love * fcoe_percpu_thread_create() - Create a receive thread for an online CPU 10831875f27eSRobert Love * @cpu: The CPU index of the CPU to create a receive thread for 1084a703e490SVasu Dev */ 1085a703e490SVasu Dev static void fcoe_percpu_thread_create(unsigned int cpu) 1086a703e490SVasu Dev { 1087a703e490SVasu Dev struct fcoe_percpu_s *p; 1088a703e490SVasu Dev struct task_struct *thread; 1089a703e490SVasu Dev 1090a703e490SVasu Dev p = &per_cpu(fcoe_percpu, cpu); 1091a703e490SVasu Dev 1092a703e490SVasu Dev thread = kthread_create(fcoe_percpu_receive_thread, 1093a703e490SVasu Dev (void *)p, "fcoethread/%d", cpu); 1094a703e490SVasu Dev 1095e7a51997SJoe Eykholt if (likely(!IS_ERR(thread))) { 1096a703e490SVasu Dev kthread_bind(thread, cpu); 1097a703e490SVasu Dev wake_up_process(thread); 1098a703e490SVasu Dev 1099a703e490SVasu Dev spin_lock_bh(&p->fcoe_rx_list.lock); 1100a703e490SVasu Dev p->thread = thread; 1101a703e490SVasu Dev spin_unlock_bh(&p->fcoe_rx_list.lock); 1102a703e490SVasu Dev } 1103a703e490SVasu Dev } 1104a703e490SVasu Dev 1105a703e490SVasu Dev /** 11061875f27eSRobert Love * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU 11071875f27eSRobert Love * @cpu: The CPU index of the CPU whose receive thread is to be destroyed 1108a703e490SVasu Dev * 1109a703e490SVasu Dev * Destroys a per-CPU Rx thread. Any pending skbs are moved to the 1110a703e490SVasu Dev * current CPU's Rx thread. If the thread being destroyed is bound to 1111a703e490SVasu Dev * the CPU processing this context the skbs will be freed. 1112a703e490SVasu Dev */ 1113a703e490SVasu Dev static void fcoe_percpu_thread_destroy(unsigned int cpu) 1114a703e490SVasu Dev { 1115a703e490SVasu Dev struct fcoe_percpu_s *p; 1116a703e490SVasu Dev struct task_struct *thread; 1117a703e490SVasu Dev struct page *crc_eof; 1118a703e490SVasu Dev struct sk_buff *skb; 1119a703e490SVasu Dev #ifdef CONFIG_SMP 1120a703e490SVasu Dev struct fcoe_percpu_s *p0; 1121f018b73aSJoe Eykholt unsigned targ_cpu = get_cpu(); 1122a703e490SVasu Dev #endif /* CONFIG_SMP */ 1123a703e490SVasu Dev 1124d5488eb9SRobert Love FCOE_DBG("Destroying receive thread for CPU %d\n", cpu); 1125a703e490SVasu Dev 1126a703e490SVasu Dev /* Prevent any new skbs from being queued for this CPU. */ 1127a703e490SVasu Dev p = &per_cpu(fcoe_percpu, cpu); 1128a703e490SVasu Dev spin_lock_bh(&p->fcoe_rx_list.lock); 1129a703e490SVasu Dev thread = p->thread; 1130a703e490SVasu Dev p->thread = NULL; 1131a703e490SVasu Dev crc_eof = p->crc_eof_page; 1132a703e490SVasu Dev p->crc_eof_page = NULL; 1133a703e490SVasu Dev p->crc_eof_offset = 0; 1134a703e490SVasu Dev spin_unlock_bh(&p->fcoe_rx_list.lock); 1135a703e490SVasu Dev 1136a703e490SVasu Dev #ifdef CONFIG_SMP 1137a703e490SVasu Dev /* 1138a703e490SVasu Dev * Don't bother moving the skb's if this context is running 1139a703e490SVasu Dev * on the same CPU that is having its thread destroyed. This 1140a703e490SVasu Dev * can easily happen when the module is removed. 1141a703e490SVasu Dev */ 1142a703e490SVasu Dev if (cpu != targ_cpu) { 1143a703e490SVasu Dev p0 = &per_cpu(fcoe_percpu, targ_cpu); 1144a703e490SVasu Dev spin_lock_bh(&p0->fcoe_rx_list.lock); 1145a703e490SVasu Dev if (p0->thread) { 1146d5488eb9SRobert Love FCOE_DBG("Moving frames from CPU %d to CPU %d\n", 1147a703e490SVasu Dev cpu, targ_cpu); 1148a703e490SVasu Dev 1149a703e490SVasu Dev while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) 1150a703e490SVasu Dev __skb_queue_tail(&p0->fcoe_rx_list, skb); 1151a703e490SVasu Dev spin_unlock_bh(&p0->fcoe_rx_list.lock); 1152a703e490SVasu Dev } else { 1153a703e490SVasu Dev /* 1154a703e490SVasu Dev * The targeted CPU is not initialized and cannot accept 1155a703e490SVasu Dev * new skbs. Unlock the targeted CPU and drop the skbs 1156a703e490SVasu Dev * on the CPU that is going offline. 1157a703e490SVasu Dev */ 1158a703e490SVasu Dev while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) 1159a703e490SVasu Dev kfree_skb(skb); 1160a703e490SVasu Dev spin_unlock_bh(&p0->fcoe_rx_list.lock); 1161a703e490SVasu Dev } 1162a703e490SVasu Dev } else { 1163a703e490SVasu Dev /* 1164a703e490SVasu Dev * This scenario occurs when the module is being removed 1165a703e490SVasu Dev * and all threads are being destroyed. skbs will continue 1166a703e490SVasu Dev * to be shifted from the CPU thread that is being removed 1167a703e490SVasu Dev * to the CPU thread associated with the CPU that is processing 1168a703e490SVasu Dev * the module removal. Once there is only one CPU Rx thread it 1169a703e490SVasu Dev * will reach this case and we will drop all skbs and later 1170a703e490SVasu Dev * stop the thread. 1171a703e490SVasu Dev */ 1172a703e490SVasu Dev spin_lock_bh(&p->fcoe_rx_list.lock); 1173a703e490SVasu Dev while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) 1174a703e490SVasu Dev kfree_skb(skb); 1175a703e490SVasu Dev spin_unlock_bh(&p->fcoe_rx_list.lock); 1176a703e490SVasu Dev } 1177f018b73aSJoe Eykholt put_cpu(); 1178a703e490SVasu Dev #else 1179a703e490SVasu Dev /* 1180dd3fd72eSChris Leech * This a non-SMP scenario where the singular Rx thread is 1181a703e490SVasu Dev * being removed. Free all skbs and stop the thread. 1182a703e490SVasu Dev */ 1183a703e490SVasu Dev spin_lock_bh(&p->fcoe_rx_list.lock); 1184a703e490SVasu Dev while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) 1185a703e490SVasu Dev kfree_skb(skb); 1186a703e490SVasu Dev spin_unlock_bh(&p->fcoe_rx_list.lock); 1187a703e490SVasu Dev #endif 1188a703e490SVasu Dev 1189a703e490SVasu Dev if (thread) 1190a703e490SVasu Dev kthread_stop(thread); 1191a703e490SVasu Dev 1192a703e490SVasu Dev if (crc_eof) 1193a703e490SVasu Dev put_page(crc_eof); 1194a703e490SVasu Dev } 1195a703e490SVasu Dev 1196a703e490SVasu Dev /** 11971875f27eSRobert Love * fcoe_cpu_callback() - Handler for CPU hotplug events 11981875f27eSRobert Love * @nfb: The callback data block 11991875f27eSRobert Love * @action: The event triggering the callback 12001875f27eSRobert Love * @hcpu: The index of the CPU that the event is for 1201a703e490SVasu Dev * 12021875f27eSRobert Love * This creates or destroys per-CPU data for fcoe 1203a703e490SVasu Dev * 1204a703e490SVasu Dev * Returns NOTIFY_OK always. 1205a703e490SVasu Dev */ 1206a703e490SVasu Dev static int fcoe_cpu_callback(struct notifier_block *nfb, 1207a703e490SVasu Dev unsigned long action, void *hcpu) 1208a703e490SVasu Dev { 1209a703e490SVasu Dev unsigned cpu = (unsigned long)hcpu; 1210a703e490SVasu Dev 1211a703e490SVasu Dev switch (action) { 1212a703e490SVasu Dev case CPU_ONLINE: 1213a703e490SVasu Dev case CPU_ONLINE_FROZEN: 1214d5488eb9SRobert Love FCOE_DBG("CPU %x online: Create Rx thread\n", cpu); 1215a703e490SVasu Dev fcoe_percpu_thread_create(cpu); 1216a703e490SVasu Dev break; 1217a703e490SVasu Dev case CPU_DEAD: 1218a703e490SVasu Dev case CPU_DEAD_FROZEN: 1219d5488eb9SRobert Love FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu); 1220a703e490SVasu Dev fcoe_percpu_thread_destroy(cpu); 1221a703e490SVasu Dev break; 1222a703e490SVasu Dev default: 1223a703e490SVasu Dev break; 1224a703e490SVasu Dev } 1225a703e490SVasu Dev return NOTIFY_OK; 1226a703e490SVasu Dev } 1227a703e490SVasu Dev 1228a703e490SVasu Dev /** 12291875f27eSRobert Love * fcoe_rcv() - Receive packets from a net device 12301875f27eSRobert Love * @skb: The received packet 12311875f27eSRobert Love * @netdev: The net device that the packet was received on 12321875f27eSRobert Love * @ptype: The packet type context 12331875f27eSRobert Love * @olddev: The last device net device 1234a703e490SVasu Dev * 12351875f27eSRobert Love * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a 12361875f27eSRobert Love * FC frame and passes the frame to libfc. 1237a703e490SVasu Dev * 1238a703e490SVasu Dev * Returns: 0 for success 1239a703e490SVasu Dev */ 12401875f27eSRobert Love int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, 1241a703e490SVasu Dev struct packet_type *ptype, struct net_device *olddev) 1242a703e490SVasu Dev { 12431875f27eSRobert Love struct fc_lport *lport; 1244a703e490SVasu Dev struct fcoe_rcv_info *fr; 1245259ad85dSChris Leech struct fcoe_interface *fcoe; 1246a703e490SVasu Dev struct fc_frame_header *fh; 1247a703e490SVasu Dev struct fcoe_percpu_s *fps; 1248519e5135SVasu Dev struct ethhdr *eh; 1249b2f0091fSVasu Dev unsigned int cpu; 1250a703e490SVasu Dev 1251259ad85dSChris Leech fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); 12521875f27eSRobert Love lport = fcoe->ctlr.lp; 12531875f27eSRobert Love if (unlikely(!lport)) { 12541875f27eSRobert Love FCOE_NETDEV_DBG(netdev, "Cannot find hba structure"); 1255a703e490SVasu Dev goto err2; 1256a703e490SVasu Dev } 12571875f27eSRobert Love if (!lport->link_up) 125897c8389dSJoe Eykholt goto err2; 1259a703e490SVasu Dev 12601875f27eSRobert Love FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p " 1261d5488eb9SRobert Love "data:%p tail:%p end:%p sum:%d dev:%s", 1262d5488eb9SRobert Love skb->len, skb->data_len, skb->head, skb->data, 1263d5488eb9SRobert Love skb_tail_pointer(skb), skb_end_pointer(skb), 1264d5488eb9SRobert Love skb->csum, skb->dev ? skb->dev->name : "<NULL>"); 1265a703e490SVasu Dev 1266519e5135SVasu Dev eh = eth_hdr(skb); 1267519e5135SVasu Dev 1268519e5135SVasu Dev if (is_fip_mode(&fcoe->ctlr) && 1269519e5135SVasu Dev compare_ether_addr(eh->h_source, fcoe->ctlr.dest_addr)) { 1270519e5135SVasu Dev FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n", 1271519e5135SVasu Dev eh->h_source); 1272a703e490SVasu Dev goto err; 1273a703e490SVasu Dev } 1274a703e490SVasu Dev 1275a703e490SVasu Dev /* 1276a703e490SVasu Dev * Check for minimum frame length, and make sure required FCoE 1277a703e490SVasu Dev * and FC headers are pulled into the linear data area. 1278a703e490SVasu Dev */ 1279a703e490SVasu Dev if (unlikely((skb->len < FCOE_MIN_FRAME) || 1280a703e490SVasu Dev !pskb_may_pull(skb, FCOE_HEADER_LEN))) 1281a703e490SVasu Dev goto err; 1282a703e490SVasu Dev 1283a703e490SVasu Dev skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); 1284a703e490SVasu Dev fh = (struct fc_frame_header *) skb_transport_header(skb); 1285a703e490SVasu Dev 12860ee31cb5SRobert Love if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) { 12870ee31cb5SRobert Love FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n", 12880ee31cb5SRobert Love eh->h_dest); 12890ee31cb5SRobert Love goto err; 12900ee31cb5SRobert Love } 12910ee31cb5SRobert Love 1292a703e490SVasu Dev fr = fcoe_dev_from_skb(skb); 12931875f27eSRobert Love fr->fr_dev = lport; 1294a703e490SVasu Dev fr->ptype = ptype; 1295a703e490SVasu Dev 1296a703e490SVasu Dev /* 1297b2f0091fSVasu Dev * In case the incoming frame's exchange is originated from 1298b2f0091fSVasu Dev * the initiator, then received frame's exchange id is ANDed 1299b2f0091fSVasu Dev * with fc_cpu_mask bits to get the same cpu on which exchange 1300b2f0091fSVasu Dev * was originated, otherwise just use the current cpu. 1301a703e490SVasu Dev */ 1302b2f0091fSVasu Dev if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) 1303b2f0091fSVasu Dev cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; 1304b2f0091fSVasu Dev else 1305b2f0091fSVasu Dev cpu = smp_processor_id(); 1306a703e490SVasu Dev 1307a703e490SVasu Dev fps = &per_cpu(fcoe_percpu, cpu); 1308a703e490SVasu Dev spin_lock_bh(&fps->fcoe_rx_list.lock); 1309a703e490SVasu Dev if (unlikely(!fps->thread)) { 1310a703e490SVasu Dev /* 1311a703e490SVasu Dev * The targeted CPU is not ready, let's target 1312a703e490SVasu Dev * the first CPU now. For non-SMP systems this 1313a703e490SVasu Dev * will check the same CPU twice. 1314a703e490SVasu Dev */ 13151875f27eSRobert Love FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread " 1316d5488eb9SRobert Love "ready for incoming skb- using first online " 1317d5488eb9SRobert Love "CPU.\n"); 1318a703e490SVasu Dev 1319a703e490SVasu Dev spin_unlock_bh(&fps->fcoe_rx_list.lock); 13206957177fSRusty Russell cpu = cpumask_first(cpu_online_mask); 1321a703e490SVasu Dev fps = &per_cpu(fcoe_percpu, cpu); 1322a703e490SVasu Dev spin_lock_bh(&fps->fcoe_rx_list.lock); 1323a703e490SVasu Dev if (!fps->thread) { 1324a703e490SVasu Dev spin_unlock_bh(&fps->fcoe_rx_list.lock); 1325a703e490SVasu Dev goto err; 1326a703e490SVasu Dev } 1327a703e490SVasu Dev } 1328a703e490SVasu Dev 1329a703e490SVasu Dev /* 1330a703e490SVasu Dev * We now have a valid CPU that we're targeting for 1331a703e490SVasu Dev * this skb. We also have this receive thread locked, 1332a703e490SVasu Dev * so we're free to queue skbs into it's queue. 1333a703e490SVasu Dev */ 1334859b7b64SChris Leech 1335859b7b64SChris Leech /* If this is a SCSI-FCP frame, and this is already executing on the 1336859b7b64SChris Leech * correct CPU, and the queue for this CPU is empty, then go ahead 1337859b7b64SChris Leech * and process the frame directly in the softirq context. 1338859b7b64SChris Leech * This lets us process completions without context switching from the 1339859b7b64SChris Leech * NET_RX softirq, to our receive processing thread, and then back to 1340859b7b64SChris Leech * BLOCK softirq context. 1341859b7b64SChris Leech */ 1342859b7b64SChris Leech if (fh->fh_type == FC_TYPE_FCP && 1343859b7b64SChris Leech cpu == smp_processor_id() && 1344859b7b64SChris Leech skb_queue_empty(&fps->fcoe_rx_list)) { 1345859b7b64SChris Leech spin_unlock_bh(&fps->fcoe_rx_list.lock); 1346859b7b64SChris Leech fcoe_recv_frame(skb); 1347859b7b64SChris Leech } else { 1348a703e490SVasu Dev __skb_queue_tail(&fps->fcoe_rx_list, skb); 1349a703e490SVasu Dev if (fps->fcoe_rx_list.qlen == 1) 1350a703e490SVasu Dev wake_up_process(fps->thread); 1351a703e490SVasu Dev spin_unlock_bh(&fps->fcoe_rx_list.lock); 1352859b7b64SChris Leech } 1353a703e490SVasu Dev 1354a703e490SVasu Dev return 0; 1355a703e490SVasu Dev err: 1356f018b73aSJoe Eykholt per_cpu_ptr(lport->dev_stats, get_cpu())->ErrorFrames++; 1357f018b73aSJoe Eykholt put_cpu(); 1358a703e490SVasu Dev err2: 1359a703e490SVasu Dev kfree_skb(skb); 1360a703e490SVasu Dev return -1; 1361a703e490SVasu Dev } 1362a703e490SVasu Dev 1363a703e490SVasu Dev /** 13641875f27eSRobert Love * fcoe_start_io() - Start FCoE I/O 13651875f27eSRobert Love * @skb: The packet to be transmitted 13661875f27eSRobert Love * 13671875f27eSRobert Love * This routine is called from the net device to start transmitting 13681875f27eSRobert Love * FCoE packets. 1369a703e490SVasu Dev * 1370a703e490SVasu Dev * Returns: 0 for success 1371a703e490SVasu Dev */ 1372a703e490SVasu Dev static inline int fcoe_start_io(struct sk_buff *skb) 1373a703e490SVasu Dev { 137418fa11efSChris Leech struct sk_buff *nskb; 1375a703e490SVasu Dev int rc; 1376a703e490SVasu Dev 137718fa11efSChris Leech nskb = skb_clone(skb, GFP_ATOMIC); 137818fa11efSChris Leech rc = dev_queue_xmit(nskb); 1379a703e490SVasu Dev if (rc != 0) 1380a703e490SVasu Dev return rc; 1381a703e490SVasu Dev kfree_skb(skb); 1382a703e490SVasu Dev return 0; 1383a703e490SVasu Dev } 1384a703e490SVasu Dev 1385a703e490SVasu Dev /** 13861875f27eSRobert Love * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC 13871875f27eSRobert Love * @skb: The packet to be transmitted 13881875f27eSRobert Love * @tlen: The total length of the trailer 13891875f27eSRobert Love * 13901875f27eSRobert Love * This routine allocates a page for frame trailers. The page is re-used if 13911875f27eSRobert Love * there is enough room left on it for the current trailer. If there isn't 13921875f27eSRobert Love * enough buffer left a new page is allocated for the trailer. Reference to 13931875f27eSRobert Love * the page from this function as well as the skbs using the page fragments 13941875f27eSRobert Love * ensure that the page is freed at the appropriate time. 1395a703e490SVasu Dev * 1396a703e490SVasu Dev * Returns: 0 for success 1397a703e490SVasu Dev */ 1398a703e490SVasu Dev static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen) 1399a703e490SVasu Dev { 1400a703e490SVasu Dev struct fcoe_percpu_s *fps; 1401a703e490SVasu Dev struct page *page; 1402a703e490SVasu Dev 1403a703e490SVasu Dev fps = &get_cpu_var(fcoe_percpu); 1404a703e490SVasu Dev page = fps->crc_eof_page; 1405a703e490SVasu Dev if (!page) { 1406a703e490SVasu Dev page = alloc_page(GFP_ATOMIC); 1407a703e490SVasu Dev if (!page) { 1408a703e490SVasu Dev put_cpu_var(fcoe_percpu); 1409a703e490SVasu Dev return -ENOMEM; 1410a703e490SVasu Dev } 1411a703e490SVasu Dev fps->crc_eof_page = page; 1412a703e490SVasu Dev fps->crc_eof_offset = 0; 1413a703e490SVasu Dev } 1414a703e490SVasu Dev 1415a703e490SVasu Dev get_page(page); 1416a703e490SVasu Dev skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, 1417a703e490SVasu Dev fps->crc_eof_offset, tlen); 1418a703e490SVasu Dev skb->len += tlen; 1419a703e490SVasu Dev skb->data_len += tlen; 1420a703e490SVasu Dev skb->truesize += tlen; 1421a703e490SVasu Dev fps->crc_eof_offset += sizeof(struct fcoe_crc_eof); 1422a703e490SVasu Dev 1423a703e490SVasu Dev if (fps->crc_eof_offset >= PAGE_SIZE) { 1424a703e490SVasu Dev fps->crc_eof_page = NULL; 1425a703e490SVasu Dev fps->crc_eof_offset = 0; 1426a703e490SVasu Dev put_page(page); 1427a703e490SVasu Dev } 1428a703e490SVasu Dev put_cpu_var(fcoe_percpu); 1429a703e490SVasu Dev return 0; 1430a703e490SVasu Dev } 1431a703e490SVasu Dev 1432a703e490SVasu Dev /** 14331875f27eSRobert Love * fcoe_fc_crc() - Calculates the CRC for a given frame 14341875f27eSRobert Love * @fp: The frame to be checksumed 1435a703e490SVasu Dev * 14361875f27eSRobert Love * This uses crc32() routine to calculate the CRC for a frame 14371875f27eSRobert Love * 14381875f27eSRobert Love * Return: The 32 bit CRC value 1439a703e490SVasu Dev */ 1440a703e490SVasu Dev u32 fcoe_fc_crc(struct fc_frame *fp) 1441a703e490SVasu Dev { 1442a703e490SVasu Dev struct sk_buff *skb = fp_skb(fp); 1443a703e490SVasu Dev struct skb_frag_struct *frag; 1444a703e490SVasu Dev unsigned char *data; 1445a703e490SVasu Dev unsigned long off, len, clen; 1446a703e490SVasu Dev u32 crc; 1447a703e490SVasu Dev unsigned i; 1448a703e490SVasu Dev 1449a703e490SVasu Dev crc = crc32(~0, skb->data, skb_headlen(skb)); 1450a703e490SVasu Dev 1451a703e490SVasu Dev for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1452a703e490SVasu Dev frag = &skb_shinfo(skb)->frags[i]; 1453a703e490SVasu Dev off = frag->page_offset; 1454a703e490SVasu Dev len = frag->size; 1455a703e490SVasu Dev while (len > 0) { 1456a703e490SVasu Dev clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK)); 1457a703e490SVasu Dev data = kmap_atomic(frag->page + (off >> PAGE_SHIFT), 1458a703e490SVasu Dev KM_SKB_DATA_SOFTIRQ); 1459a703e490SVasu Dev crc = crc32(crc, data + (off & ~PAGE_MASK), clen); 1460a703e490SVasu Dev kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ); 1461a703e490SVasu Dev off += clen; 1462a703e490SVasu Dev len -= clen; 1463a703e490SVasu Dev } 1464a703e490SVasu Dev } 1465a703e490SVasu Dev return crc; 1466a703e490SVasu Dev } 1467a703e490SVasu Dev 1468a703e490SVasu Dev /** 14691875f27eSRobert Love * fcoe_xmit() - Transmit a FCoE frame 14701875f27eSRobert Love * @lport: The local port that the frame is to be transmitted for 14711875f27eSRobert Love * @fp: The frame to be transmitted 1472a703e490SVasu Dev * 1473a703e490SVasu Dev * Return: 0 for success 1474a703e490SVasu Dev */ 14751875f27eSRobert Love int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) 1476a703e490SVasu Dev { 14774bb6b515SVasu Dev int wlen; 1478a703e490SVasu Dev u32 crc; 1479a703e490SVasu Dev struct ethhdr *eh; 1480a703e490SVasu Dev struct fcoe_crc_eof *cp; 1481a703e490SVasu Dev struct sk_buff *skb; 1482a703e490SVasu Dev struct fcoe_dev_stats *stats; 1483a703e490SVasu Dev struct fc_frame_header *fh; 1484a703e490SVasu Dev unsigned int hlen; /* header length implies the version */ 1485a703e490SVasu Dev unsigned int tlen; /* trailer length */ 1486a703e490SVasu Dev unsigned int elen; /* eth header, may include vlan */ 14871875f27eSRobert Love struct fcoe_port *port = lport_priv(lport); 14883fe9a0baSChris Leech struct fcoe_interface *fcoe = port->fcoe; 1489a703e490SVasu Dev u8 sof, eof; 1490a703e490SVasu Dev struct fcoe_hdr *hp; 1491a703e490SVasu Dev 1492a703e490SVasu Dev WARN_ON((fr_len(fp) % sizeof(u32)) != 0); 1493a703e490SVasu Dev 1494a703e490SVasu Dev fh = fc_frame_header_get(fp); 149597c8389dSJoe Eykholt skb = fp_skb(fp); 149697c8389dSJoe Eykholt wlen = skb->len / FCOE_WORD_TO_BYTE; 149797c8389dSJoe Eykholt 14981875f27eSRobert Love if (!lport->link_up) { 14993caf02eeSDan Carpenter kfree_skb(skb); 150097c8389dSJoe Eykholt return 0; 1501a703e490SVasu Dev } 1502a703e490SVasu Dev 15039860eeb4SJoe Eykholt if (unlikely(fh->fh_type == FC_TYPE_ELS) && 15041875f27eSRobert Love fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb)) 150597c8389dSJoe Eykholt return 0; 150697c8389dSJoe Eykholt 1507a703e490SVasu Dev sof = fr_sof(fp); 1508a703e490SVasu Dev eof = fr_eof(fp); 1509a703e490SVasu Dev 15104e57e1cbSVasu Dev elen = sizeof(struct ethhdr); 1511a703e490SVasu Dev hlen = sizeof(struct fcoe_hdr); 1512a703e490SVasu Dev tlen = sizeof(struct fcoe_crc_eof); 1513a703e490SVasu Dev wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; 1514a703e490SVasu Dev 1515a703e490SVasu Dev /* crc offload */ 15161875f27eSRobert Love if (likely(lport->crc_offload)) { 1517a703e490SVasu Dev skb->ip_summed = CHECKSUM_PARTIAL; 1518a703e490SVasu Dev skb->csum_start = skb_headroom(skb); 1519a703e490SVasu Dev skb->csum_offset = skb->len; 1520a703e490SVasu Dev crc = 0; 1521a703e490SVasu Dev } else { 1522a703e490SVasu Dev skb->ip_summed = CHECKSUM_NONE; 1523a703e490SVasu Dev crc = fcoe_fc_crc(fp); 1524a703e490SVasu Dev } 1525a703e490SVasu Dev 1526014f5c3fSChris Leech /* copy port crc and eof to the skb buff */ 1527a703e490SVasu Dev if (skb_is_nonlinear(skb)) { 1528a703e490SVasu Dev skb_frag_t *frag; 1529a703e490SVasu Dev if (fcoe_get_paged_crc_eof(skb, tlen)) { 1530a703e490SVasu Dev kfree_skb(skb); 1531a703e490SVasu Dev return -ENOMEM; 1532a703e490SVasu Dev } 1533a703e490SVasu Dev frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; 1534a703e490SVasu Dev cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ) 1535a703e490SVasu Dev + frag->page_offset; 1536a703e490SVasu Dev } else { 1537a703e490SVasu Dev cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); 1538a703e490SVasu Dev } 1539a703e490SVasu Dev 1540a703e490SVasu Dev memset(cp, 0, sizeof(*cp)); 1541a703e490SVasu Dev cp->fcoe_eof = eof; 1542a703e490SVasu Dev cp->fcoe_crc32 = cpu_to_le32(~crc); 1543a703e490SVasu Dev 1544a703e490SVasu Dev if (skb_is_nonlinear(skb)) { 1545a703e490SVasu Dev kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ); 1546a703e490SVasu Dev cp = NULL; 1547a703e490SVasu Dev } 1548a703e490SVasu Dev 1549014f5c3fSChris Leech /* adjust skb network/transport offsets to match mac/fcoe/port */ 1550a703e490SVasu Dev skb_push(skb, elen + hlen); 1551a703e490SVasu Dev skb_reset_mac_header(skb); 1552a703e490SVasu Dev skb_reset_network_header(skb); 1553a703e490SVasu Dev skb->mac_len = elen; 1554a703e490SVasu Dev skb->protocol = htons(ETH_P_FCOE); 15553fe9a0baSChris Leech skb->dev = fcoe->netdev; 1556a703e490SVasu Dev 1557a703e490SVasu Dev /* fill up mac and fcoe headers */ 1558a703e490SVasu Dev eh = eth_hdr(skb); 1559a703e490SVasu Dev eh->h_proto = htons(ETH_P_FCOE); 15603fe9a0baSChris Leech memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN); 1561cd229e42SJoe Eykholt if (fcoe->ctlr.map_dest) 1562cd229e42SJoe Eykholt memcpy(eh->h_dest + 3, fh->fh_d_id, 3); 1563a703e490SVasu Dev 15643fe9a0baSChris Leech if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN)) 15653fe9a0baSChris Leech memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN); 1566a703e490SVasu Dev else 156711b56188SChris Leech memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); 1568a703e490SVasu Dev 1569a703e490SVasu Dev hp = (struct fcoe_hdr *)(eh + 1); 1570a703e490SVasu Dev memset(hp, 0, sizeof(*hp)); 1571a703e490SVasu Dev if (FC_FCOE_VER) 1572a703e490SVasu Dev FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); 1573a703e490SVasu Dev hp->fcoe_sof = sof; 1574a703e490SVasu Dev 1575a703e490SVasu Dev /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ 15761875f27eSRobert Love if (lport->seq_offload && fr_max_payload(fp)) { 1577a703e490SVasu Dev skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; 1578a703e490SVasu Dev skb_shinfo(skb)->gso_size = fr_max_payload(fp); 1579a703e490SVasu Dev } else { 1580a703e490SVasu Dev skb_shinfo(skb)->gso_type = 0; 1581a703e490SVasu Dev skb_shinfo(skb)->gso_size = 0; 1582a703e490SVasu Dev } 1583a703e490SVasu Dev /* update tx stats: regardless if LLD fails */ 1584f018b73aSJoe Eykholt stats = per_cpu_ptr(lport->dev_stats, get_cpu()); 1585a703e490SVasu Dev stats->TxFrames++; 1586a703e490SVasu Dev stats->TxWords += wlen; 1587f018b73aSJoe Eykholt put_cpu(); 1588a703e490SVasu Dev 1589a703e490SVasu Dev /* send down to lld */ 15901875f27eSRobert Love fr_dev(fp) = lport; 1591014f5c3fSChris Leech if (port->fcoe_pending_queue.qlen) 15921875f27eSRobert Love fcoe_check_wait_queue(lport, skb); 15934bb6b515SVasu Dev else if (fcoe_start_io(skb)) 15941875f27eSRobert Love fcoe_check_wait_queue(lport, skb); 1595a703e490SVasu Dev 1596a703e490SVasu Dev return 0; 1597a703e490SVasu Dev } 1598a703e490SVasu Dev 1599a703e490SVasu Dev /** 16001875f27eSRobert Love * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion 16011875f27eSRobert Love * @skb: The completed skb (argument required by destructor) 1602e7a51997SJoe Eykholt */ 1603e7a51997SJoe Eykholt static void fcoe_percpu_flush_done(struct sk_buff *skb) 1604e7a51997SJoe Eykholt { 1605e7a51997SJoe Eykholt complete(&fcoe_flush_completion); 1606e7a51997SJoe Eykholt } 1607e7a51997SJoe Eykholt 1608e7a51997SJoe Eykholt /** 1609859b7b64SChris Leech * fcoe_recv_frame() - process a single received frame 1610859b7b64SChris Leech * @skb: frame to process 1611a703e490SVasu Dev */ 1612859b7b64SChris Leech static void fcoe_recv_frame(struct sk_buff *skb) 1613a703e490SVasu Dev { 1614a703e490SVasu Dev u32 fr_len; 16151875f27eSRobert Love struct fc_lport *lport; 1616a703e490SVasu Dev struct fcoe_rcv_info *fr; 1617a703e490SVasu Dev struct fcoe_dev_stats *stats; 1618a703e490SVasu Dev struct fc_frame_header *fh; 1619a703e490SVasu Dev struct fcoe_crc_eof crc_eof; 1620a703e490SVasu Dev struct fc_frame *fp; 1621014f5c3fSChris Leech struct fcoe_port *port; 1622a703e490SVasu Dev struct fcoe_hdr *hp; 1623a703e490SVasu Dev 1624a703e490SVasu Dev fr = fcoe_dev_from_skb(skb); 16251875f27eSRobert Love lport = fr->fr_dev; 16261875f27eSRobert Love if (unlikely(!lport)) { 1627e7a51997SJoe Eykholt if (skb->destructor != fcoe_percpu_flush_done) 1628e7a51997SJoe Eykholt FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb"); 1629a703e490SVasu Dev kfree_skb(skb); 1630859b7b64SChris Leech return; 1631a703e490SVasu Dev } 1632a703e490SVasu Dev 1633d5488eb9SRobert Love FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d " 1634d5488eb9SRobert Love "head:%p data:%p tail:%p end:%p sum:%d dev:%s", 1635a703e490SVasu Dev skb->len, skb->data_len, 1636a703e490SVasu Dev skb->head, skb->data, skb_tail_pointer(skb), 1637a703e490SVasu Dev skb_end_pointer(skb), skb->csum, 1638a703e490SVasu Dev skb->dev ? skb->dev->name : "<NULL>"); 1639a703e490SVasu Dev 16401875f27eSRobert Love port = lport_priv(lport); 1641a703e490SVasu Dev if (skb_is_nonlinear(skb)) 1642a703e490SVasu Dev skb_linearize(skb); /* not ideal */ 1643a703e490SVasu Dev 1644a703e490SVasu Dev /* 1645a703e490SVasu Dev * Frame length checks and setting up the header pointers 1646a703e490SVasu Dev * was done in fcoe_rcv already. 1647a703e490SVasu Dev */ 1648a703e490SVasu Dev hp = (struct fcoe_hdr *) skb_network_header(skb); 1649a703e490SVasu Dev fh = (struct fc_frame_header *) skb_transport_header(skb); 1650a703e490SVasu Dev 1651f018b73aSJoe Eykholt stats = per_cpu_ptr(lport->dev_stats, get_cpu()); 1652a703e490SVasu Dev if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { 1653a703e490SVasu Dev if (stats->ErrorFrames < 5) 1654d5488eb9SRobert Love printk(KERN_WARNING "fcoe: FCoE version " 1655a703e490SVasu Dev "mismatch: The frame has " 1656a703e490SVasu Dev "version %x, but the " 1657a703e490SVasu Dev "initiator supports version " 1658a703e490SVasu Dev "%x\n", FC_FCOE_DECAPS_VER(hp), 1659a703e490SVasu Dev FC_FCOE_VER); 1660f018b73aSJoe Eykholt goto drop; 1661a703e490SVasu Dev } 1662a703e490SVasu Dev 1663a703e490SVasu Dev skb_pull(skb, sizeof(struct fcoe_hdr)); 1664a703e490SVasu Dev fr_len = skb->len - sizeof(struct fcoe_crc_eof); 1665a703e490SVasu Dev 1666a703e490SVasu Dev stats->RxFrames++; 1667a703e490SVasu Dev stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; 1668a703e490SVasu Dev 1669a703e490SVasu Dev fp = (struct fc_frame *)skb; 1670a703e490SVasu Dev fc_frame_init(fp); 16711875f27eSRobert Love fr_dev(fp) = lport; 1672a703e490SVasu Dev fr_sof(fp) = hp->fcoe_sof; 1673a703e490SVasu Dev 1674a703e490SVasu Dev /* Copy out the CRC and EOF trailer for access */ 1675f018b73aSJoe Eykholt if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) 1676f018b73aSJoe Eykholt goto drop; 1677a703e490SVasu Dev fr_eof(fp) = crc_eof.fcoe_eof; 1678a703e490SVasu Dev fr_crc(fp) = crc_eof.fcoe_crc32; 1679f018b73aSJoe Eykholt if (pskb_trim(skb, fr_len)) 1680f018b73aSJoe Eykholt goto drop; 1681a703e490SVasu Dev 1682a703e490SVasu Dev /* 1683a703e490SVasu Dev * We only check CRC if no offload is available and if it is 1684a703e490SVasu Dev * it's solicited data, in which case, the FCP layer would 1685a703e490SVasu Dev * check it during the copy. 1686a703e490SVasu Dev */ 16871875f27eSRobert Love if (lport->crc_offload && 16881875f27eSRobert Love skb->ip_summed == CHECKSUM_UNNECESSARY) 1689a703e490SVasu Dev fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 1690a703e490SVasu Dev else 1691a703e490SVasu Dev fr_flags(fp) |= FCPHF_CRC_UNCHECKED; 1692a703e490SVasu Dev 1693a703e490SVasu Dev fh = fc_frame_header_get(fp); 1694f018b73aSJoe Eykholt if ((fh->fh_r_ctl != FC_RCTL_DD_SOL_DATA || 1695f018b73aSJoe Eykholt fh->fh_type != FC_TYPE_FCP) && 1696f018b73aSJoe Eykholt (fr_flags(fp) & FCPHF_CRC_UNCHECKED)) { 1697a703e490SVasu Dev if (le32_to_cpu(fr_crc(fp)) != 1698a703e490SVasu Dev ~crc32(~0, skb->data, fr_len)) { 1699d5488eb9SRobert Love if (stats->InvalidCRCCount < 5) 1700a703e490SVasu Dev printk(KERN_WARNING "fcoe: dropping " 1701a703e490SVasu Dev "frame with CRC error\n"); 1702a703e490SVasu Dev stats->InvalidCRCCount++; 1703f018b73aSJoe Eykholt goto drop; 1704a703e490SVasu Dev } 1705a703e490SVasu Dev fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 1706a703e490SVasu Dev } 1707f018b73aSJoe Eykholt put_cpu(); 17081875f27eSRobert Love fc_exch_recv(lport, fp); 1709f018b73aSJoe Eykholt return; 1710f018b73aSJoe Eykholt 1711f018b73aSJoe Eykholt drop: 1712f018b73aSJoe Eykholt stats->ErrorFrames++; 1713f018b73aSJoe Eykholt put_cpu(); 1714f018b73aSJoe Eykholt kfree_skb(skb); 1715a703e490SVasu Dev } 1716859b7b64SChris Leech 1717859b7b64SChris Leech /** 1718859b7b64SChris Leech * fcoe_percpu_receive_thread() - The per-CPU packet receive thread 1719859b7b64SChris Leech * @arg: The per-CPU context 1720859b7b64SChris Leech * 1721859b7b64SChris Leech * Return: 0 for success 1722859b7b64SChris Leech */ 1723859b7b64SChris Leech int fcoe_percpu_receive_thread(void *arg) 1724859b7b64SChris Leech { 1725859b7b64SChris Leech struct fcoe_percpu_s *p = arg; 1726859b7b64SChris Leech struct sk_buff *skb; 1727859b7b64SChris Leech 1728859b7b64SChris Leech set_user_nice(current, -20); 1729859b7b64SChris Leech 1730859b7b64SChris Leech while (!kthread_should_stop()) { 1731859b7b64SChris Leech 1732859b7b64SChris Leech spin_lock_bh(&p->fcoe_rx_list.lock); 1733859b7b64SChris Leech while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) { 1734859b7b64SChris Leech set_current_state(TASK_INTERRUPTIBLE); 1735859b7b64SChris Leech spin_unlock_bh(&p->fcoe_rx_list.lock); 1736859b7b64SChris Leech schedule(); 1737859b7b64SChris Leech set_current_state(TASK_RUNNING); 1738859b7b64SChris Leech if (kthread_should_stop()) 1739859b7b64SChris Leech return 0; 1740859b7b64SChris Leech spin_lock_bh(&p->fcoe_rx_list.lock); 1741859b7b64SChris Leech } 1742859b7b64SChris Leech spin_unlock_bh(&p->fcoe_rx_list.lock); 1743859b7b64SChris Leech fcoe_recv_frame(skb); 1744859b7b64SChris Leech } 1745a703e490SVasu Dev return 0; 1746a703e490SVasu Dev } 1747a703e490SVasu Dev 1748a703e490SVasu Dev /** 17491875f27eSRobert Love * fcoe_check_wait_queue() - Attempt to clear the transmit backlog 17501875f27eSRobert Love * @lport: The local port whose backlog is to be cleared 1751a703e490SVasu Dev * 17521875f27eSRobert Love * This empties the wait_queue, dequeues the head of the wait_queue queue 17531875f27eSRobert Love * and calls fcoe_start_io() for each packet. If all skb have been 17541875f27eSRobert Love * transmitted it returns the qlen. If an error occurs it restores 17551875f27eSRobert Love * wait_queue (to try again later) and returns -1. 1756a703e490SVasu Dev * 17571875f27eSRobert Love * The wait_queue is used when the skb transmit fails. The failed skb 17581875f27eSRobert Love * will go in the wait_queue which will be emptied by the timer function or 1759a703e490SVasu Dev * by the next skb transmit. 1760a703e490SVasu Dev */ 17611875f27eSRobert Love static void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb) 1762a703e490SVasu Dev { 17631875f27eSRobert Love struct fcoe_port *port = lport_priv(lport); 17644bb6b515SVasu Dev int rc; 1765a703e490SVasu Dev 1766014f5c3fSChris Leech spin_lock_bh(&port->fcoe_pending_queue.lock); 17674bb6b515SVasu Dev 17684bb6b515SVasu Dev if (skb) 1769014f5c3fSChris Leech __skb_queue_tail(&port->fcoe_pending_queue, skb); 17704bb6b515SVasu Dev 1771014f5c3fSChris Leech if (port->fcoe_pending_queue_active) 1772a703e490SVasu Dev goto out; 1773014f5c3fSChris Leech port->fcoe_pending_queue_active = 1; 1774a703e490SVasu Dev 1775014f5c3fSChris Leech while (port->fcoe_pending_queue.qlen) { 1776a703e490SVasu Dev /* keep qlen > 0 until fcoe_start_io succeeds */ 1777014f5c3fSChris Leech port->fcoe_pending_queue.qlen++; 1778014f5c3fSChris Leech skb = __skb_dequeue(&port->fcoe_pending_queue); 1779a703e490SVasu Dev 1780014f5c3fSChris Leech spin_unlock_bh(&port->fcoe_pending_queue.lock); 1781a703e490SVasu Dev rc = fcoe_start_io(skb); 1782014f5c3fSChris Leech spin_lock_bh(&port->fcoe_pending_queue.lock); 1783a703e490SVasu Dev 1784a703e490SVasu Dev if (rc) { 1785014f5c3fSChris Leech __skb_queue_head(&port->fcoe_pending_queue, skb); 1786a703e490SVasu Dev /* undo temporary increment above */ 1787014f5c3fSChris Leech port->fcoe_pending_queue.qlen--; 1788a703e490SVasu Dev break; 1789a703e490SVasu Dev } 1790a703e490SVasu Dev /* undo temporary increment above */ 1791014f5c3fSChris Leech port->fcoe_pending_queue.qlen--; 1792a703e490SVasu Dev } 1793a703e490SVasu Dev 1794014f5c3fSChris Leech if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH) 17951875f27eSRobert Love lport->qfull = 0; 1796014f5c3fSChris Leech if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer)) 1797014f5c3fSChris Leech mod_timer(&port->timer, jiffies + 2); 1798014f5c3fSChris Leech port->fcoe_pending_queue_active = 0; 1799a703e490SVasu Dev out: 1800014f5c3fSChris Leech if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH) 18011875f27eSRobert Love lport->qfull = 1; 1802014f5c3fSChris Leech spin_unlock_bh(&port->fcoe_pending_queue.lock); 18034bb6b515SVasu Dev return; 1804a703e490SVasu Dev } 1805a703e490SVasu Dev 1806a703e490SVasu Dev /** 18071875f27eSRobert Love * fcoe_dev_setup() - Setup the link change notification interface 1808a703e490SVasu Dev */ 1809b0d428adSRandy Dunlap static void fcoe_dev_setup(void) 1810a703e490SVasu Dev { 1811a703e490SVasu Dev register_netdevice_notifier(&fcoe_notifier); 1812a703e490SVasu Dev } 1813a703e490SVasu Dev 1814a703e490SVasu Dev /** 18151875f27eSRobert Love * fcoe_dev_cleanup() - Cleanup the link change notification interface 1816a703e490SVasu Dev */ 1817a703e490SVasu Dev static void fcoe_dev_cleanup(void) 1818a703e490SVasu Dev { 1819a703e490SVasu Dev unregister_netdevice_notifier(&fcoe_notifier); 1820a703e490SVasu Dev } 1821a703e490SVasu Dev 1822a703e490SVasu Dev /** 18231875f27eSRobert Love * fcoe_device_notification() - Handler for net device events 18241875f27eSRobert Love * @notifier: The context of the notification 18251875f27eSRobert Love * @event: The type of event 18261875f27eSRobert Love * @ptr: The net device that the event was on 1827a703e490SVasu Dev * 18281875f27eSRobert Love * This function is called by the Ethernet driver in case of link change event. 1829a703e490SVasu Dev * 1830a703e490SVasu Dev * Returns: 0 for success 1831a703e490SVasu Dev */ 1832a703e490SVasu Dev static int fcoe_device_notification(struct notifier_block *notifier, 1833a703e490SVasu Dev ulong event, void *ptr) 1834a703e490SVasu Dev { 18351875f27eSRobert Love struct fc_lport *lport = NULL; 18361d1b88dcSVasu Dev struct net_device *netdev = ptr; 1837014f5c3fSChris Leech struct fcoe_interface *fcoe; 18382e70e241SChris Leech struct fcoe_port *port; 1839a703e490SVasu Dev struct fcoe_dev_stats *stats; 184097c8389dSJoe Eykholt u32 link_possible = 1; 1841a703e490SVasu Dev u32 mfs; 1842a703e490SVasu Dev int rc = NOTIFY_OK; 1843a703e490SVasu Dev 1844014f5c3fSChris Leech list_for_each_entry(fcoe, &fcoe_hostlist, list) { 184525024989SChris Leech if (fcoe->netdev == netdev) { 18461875f27eSRobert Love lport = fcoe->ctlr.lp; 1847a703e490SVasu Dev break; 1848a703e490SVasu Dev } 1849a703e490SVasu Dev } 18501875f27eSRobert Love if (!lport) { 1851a703e490SVasu Dev rc = NOTIFY_DONE; 1852a703e490SVasu Dev goto out; 1853a703e490SVasu Dev } 1854a703e490SVasu Dev 1855a703e490SVasu Dev switch (event) { 1856a703e490SVasu Dev case NETDEV_DOWN: 1857a703e490SVasu Dev case NETDEV_GOING_DOWN: 185897c8389dSJoe Eykholt link_possible = 0; 1859a703e490SVasu Dev break; 1860a703e490SVasu Dev case NETDEV_UP: 1861a703e490SVasu Dev case NETDEV_CHANGE: 1862a703e490SVasu Dev break; 1863a703e490SVasu Dev case NETDEV_CHANGEMTU: 18647221d7e5SYi Zou if (netdev->features & NETIF_F_FCOE_MTU) 18657221d7e5SYi Zou break; 18661d1b88dcSVasu Dev mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + 1867a703e490SVasu Dev sizeof(struct fcoe_crc_eof)); 1868a703e490SVasu Dev if (mfs >= FC_MIN_MAX_FRAME) 18691875f27eSRobert Love fc_set_mfs(lport, mfs); 1870a703e490SVasu Dev break; 1871a703e490SVasu Dev case NETDEV_REGISTER: 1872a703e490SVasu Dev break; 18732e70e241SChris Leech case NETDEV_UNREGISTER: 18742e70e241SChris Leech list_del(&fcoe->list); 18752e70e241SChris Leech port = lport_priv(fcoe->ctlr.lp); 18762e70e241SChris Leech fcoe_interface_cleanup(fcoe); 18772e70e241SChris Leech schedule_work(&port->destroy_work); 18782e70e241SChris Leech goto out; 18792e70e241SChris Leech break; 188054a5b21dSYi Zou case NETDEV_FEAT_CHANGE: 188154a5b21dSYi Zou fcoe_netdev_features_change(lport, netdev); 188254a5b21dSYi Zou break; 1883a703e490SVasu Dev default: 18841d1b88dcSVasu Dev FCOE_NETDEV_DBG(netdev, "Unknown event %ld " 1885d5488eb9SRobert Love "from netdev netlink\n", event); 1886a703e490SVasu Dev } 18875e4f8fe7SRobert Love 18885e4f8fe7SRobert Love fcoe_link_speed_update(lport); 18895e4f8fe7SRobert Love 18901875f27eSRobert Love if (link_possible && !fcoe_link_ok(lport)) 18913fe9a0baSChris Leech fcoe_ctlr_link_up(&fcoe->ctlr); 18923fe9a0baSChris Leech else if (fcoe_ctlr_link_down(&fcoe->ctlr)) { 1893f018b73aSJoe Eykholt stats = per_cpu_ptr(lport->dev_stats, get_cpu()); 1894a703e490SVasu Dev stats->LinkFailureCount++; 1895f018b73aSJoe Eykholt put_cpu(); 18961875f27eSRobert Love fcoe_clean_pending_queue(lport); 1897a703e490SVasu Dev } 1898a703e490SVasu Dev out: 1899a703e490SVasu Dev return rc; 1900a703e490SVasu Dev } 1901a703e490SVasu Dev 1902a703e490SVasu Dev /** 19031875f27eSRobert Love * fcoe_if_to_netdev() - Parse a name buffer to get a net device 19041875f27eSRobert Love * @buffer: The name of the net device 1905a703e490SVasu Dev * 19061875f27eSRobert Love * Returns: NULL or a ptr to net_device 1907a703e490SVasu Dev */ 1908a703e490SVasu Dev static struct net_device *fcoe_if_to_netdev(const char *buffer) 1909a703e490SVasu Dev { 1910a703e490SVasu Dev char *cp; 1911a703e490SVasu Dev char ifname[IFNAMSIZ + 2]; 1912a703e490SVasu Dev 1913a703e490SVasu Dev if (buffer) { 1914a703e490SVasu Dev strlcpy(ifname, buffer, IFNAMSIZ); 1915a703e490SVasu Dev cp = ifname + strlen(ifname); 1916a703e490SVasu Dev while (--cp >= ifname && *cp == '\n') 1917a703e490SVasu Dev *cp = '\0'; 1918a703e490SVasu Dev return dev_get_by_name(&init_net, ifname); 1919a703e490SVasu Dev } 1920a703e490SVasu Dev return NULL; 1921a703e490SVasu Dev } 1922a703e490SVasu Dev 1923a703e490SVasu Dev /** 192455a66d3cSVasu Dev * fcoe_disable() - Disables a FCoE interface 192555a66d3cSVasu Dev * @buffer: The name of the Ethernet interface to be disabled 192655a66d3cSVasu Dev * @kp: The associated kernel parameter 192755a66d3cSVasu Dev * 192855a66d3cSVasu Dev * Called from sysfs. 192955a66d3cSVasu Dev * 193055a66d3cSVasu Dev * Returns: 0 for success 193155a66d3cSVasu Dev */ 193255a66d3cSVasu Dev static int fcoe_disable(const char *buffer, struct kernel_param *kp) 193355a66d3cSVasu Dev { 193455a66d3cSVasu Dev struct fcoe_interface *fcoe; 193555a66d3cSVasu Dev struct net_device *netdev; 193655a66d3cSVasu Dev int rc = 0; 193755a66d3cSVasu Dev 193855a66d3cSVasu Dev mutex_lock(&fcoe_config_mutex); 193955a66d3cSVasu Dev #ifdef CONFIG_FCOE_MODULE 194055a66d3cSVasu Dev /* 194155a66d3cSVasu Dev * Make sure the module has been initialized, and is not about to be 194255a66d3cSVasu Dev * removed. Module paramter sysfs files are writable before the 194355a66d3cSVasu Dev * module_init function is called and after module_exit. 194455a66d3cSVasu Dev */ 194555a66d3cSVasu Dev if (THIS_MODULE->state != MODULE_STATE_LIVE) { 194655a66d3cSVasu Dev rc = -ENODEV; 194755a66d3cSVasu Dev goto out_nodev; 194855a66d3cSVasu Dev } 194955a66d3cSVasu Dev #endif 195055a66d3cSVasu Dev 195155a66d3cSVasu Dev netdev = fcoe_if_to_netdev(buffer); 195255a66d3cSVasu Dev if (!netdev) { 195355a66d3cSVasu Dev rc = -ENODEV; 195455a66d3cSVasu Dev goto out_nodev; 195555a66d3cSVasu Dev } 195655a66d3cSVasu Dev 195734ce27bcSVasu Dev if (!rtnl_trylock()) { 195834ce27bcSVasu Dev dev_put(netdev); 195934ce27bcSVasu Dev mutex_unlock(&fcoe_config_mutex); 196034ce27bcSVasu Dev return restart_syscall(); 196134ce27bcSVasu Dev } 196234ce27bcSVasu Dev 196355a66d3cSVasu Dev fcoe = fcoe_hostlist_lookup_port(netdev); 196455a66d3cSVasu Dev rtnl_unlock(); 196555a66d3cSVasu Dev 19669ee50e48SChris Leech if (fcoe) { 19679ee50e48SChris Leech fcoe_ctlr_link_down(&fcoe->ctlr); 19689d4cbc05SVasu Dev fcoe_clean_pending_queue(fcoe->ctlr.lp); 19699ee50e48SChris Leech } else 197055a66d3cSVasu Dev rc = -ENODEV; 197155a66d3cSVasu Dev 197255a66d3cSVasu Dev dev_put(netdev); 197355a66d3cSVasu Dev out_nodev: 197455a66d3cSVasu Dev mutex_unlock(&fcoe_config_mutex); 197555a66d3cSVasu Dev return rc; 197655a66d3cSVasu Dev } 197755a66d3cSVasu Dev 197855a66d3cSVasu Dev /** 197955a66d3cSVasu Dev * fcoe_enable() - Enables a FCoE interface 198055a66d3cSVasu Dev * @buffer: The name of the Ethernet interface to be enabled 198155a66d3cSVasu Dev * @kp: The associated kernel parameter 198255a66d3cSVasu Dev * 198355a66d3cSVasu Dev * Called from sysfs. 198455a66d3cSVasu Dev * 198555a66d3cSVasu Dev * Returns: 0 for success 198655a66d3cSVasu Dev */ 198755a66d3cSVasu Dev static int fcoe_enable(const char *buffer, struct kernel_param *kp) 198855a66d3cSVasu Dev { 198955a66d3cSVasu Dev struct fcoe_interface *fcoe; 199055a66d3cSVasu Dev struct net_device *netdev; 199155a66d3cSVasu Dev int rc = 0; 199255a66d3cSVasu Dev 199355a66d3cSVasu Dev mutex_lock(&fcoe_config_mutex); 199455a66d3cSVasu Dev #ifdef CONFIG_FCOE_MODULE 199555a66d3cSVasu Dev /* 199655a66d3cSVasu Dev * Make sure the module has been initialized, and is not about to be 199755a66d3cSVasu Dev * removed. Module paramter sysfs files are writable before the 199855a66d3cSVasu Dev * module_init function is called and after module_exit. 199955a66d3cSVasu Dev */ 200055a66d3cSVasu Dev if (THIS_MODULE->state != MODULE_STATE_LIVE) { 200155a66d3cSVasu Dev rc = -ENODEV; 200255a66d3cSVasu Dev goto out_nodev; 200355a66d3cSVasu Dev } 200455a66d3cSVasu Dev #endif 200555a66d3cSVasu Dev 200655a66d3cSVasu Dev netdev = fcoe_if_to_netdev(buffer); 200755a66d3cSVasu Dev if (!netdev) { 200855a66d3cSVasu Dev rc = -ENODEV; 200955a66d3cSVasu Dev goto out_nodev; 201055a66d3cSVasu Dev } 201155a66d3cSVasu Dev 201234ce27bcSVasu Dev if (!rtnl_trylock()) { 201334ce27bcSVasu Dev dev_put(netdev); 201434ce27bcSVasu Dev mutex_unlock(&fcoe_config_mutex); 201534ce27bcSVasu Dev return restart_syscall(); 201634ce27bcSVasu Dev } 201734ce27bcSVasu Dev 201855a66d3cSVasu Dev fcoe = fcoe_hostlist_lookup_port(netdev); 201955a66d3cSVasu Dev rtnl_unlock(); 202055a66d3cSVasu Dev 20219d4cbc05SVasu Dev if (!fcoe) 202255a66d3cSVasu Dev rc = -ENODEV; 20239d4cbc05SVasu Dev else if (!fcoe_link_ok(fcoe->ctlr.lp)) 20249d4cbc05SVasu Dev fcoe_ctlr_link_up(&fcoe->ctlr); 202555a66d3cSVasu Dev 202655a66d3cSVasu Dev dev_put(netdev); 202755a66d3cSVasu Dev out_nodev: 202855a66d3cSVasu Dev mutex_unlock(&fcoe_config_mutex); 202955a66d3cSVasu Dev return rc; 203055a66d3cSVasu Dev } 203155a66d3cSVasu Dev 203255a66d3cSVasu Dev /** 20331875f27eSRobert Love * fcoe_destroy() - Destroy a FCoE interface 20341875f27eSRobert Love * @buffer: The name of the Ethernet interface to be destroyed 20351875f27eSRobert Love * @kp: The associated kernel parameter 20361875f27eSRobert Love * 20371875f27eSRobert Love * Called from sysfs. 2038a703e490SVasu Dev * 2039a703e490SVasu Dev * Returns: 0 for success 2040a703e490SVasu Dev */ 2041a703e490SVasu Dev static int fcoe_destroy(const char *buffer, struct kernel_param *kp) 2042a703e490SVasu Dev { 2043030f4e00SChris Leech struct fcoe_interface *fcoe; 20442e70e241SChris Leech struct net_device *netdev; 20458eca355fSMike Christie int rc = 0; 2046a703e490SVasu Dev 2047dfc1d0feSChris Leech mutex_lock(&fcoe_config_mutex); 2048dfc1d0feSChris Leech #ifdef CONFIG_FCOE_MODULE 2049dfc1d0feSChris Leech /* 2050dfc1d0feSChris Leech * Make sure the module has been initialized, and is not about to be 2051dfc1d0feSChris Leech * removed. Module paramter sysfs files are writable before the 2052dfc1d0feSChris Leech * module_init function is called and after module_exit. 2053dfc1d0feSChris Leech */ 2054dfc1d0feSChris Leech if (THIS_MODULE->state != MODULE_STATE_LIVE) { 2055dfc1d0feSChris Leech rc = -ENODEV; 2056dfc1d0feSChris Leech goto out_nodev; 2057dfc1d0feSChris Leech } 2058dfc1d0feSChris Leech #endif 2059dfc1d0feSChris Leech 2060a703e490SVasu Dev netdev = fcoe_if_to_netdev(buffer); 2061a703e490SVasu Dev if (!netdev) { 2062a703e490SVasu Dev rc = -ENODEV; 2063a703e490SVasu Dev goto out_nodev; 2064a703e490SVasu Dev } 20652e70e241SChris Leech 206634ce27bcSVasu Dev if (!rtnl_trylock()) { 206734ce27bcSVasu Dev dev_put(netdev); 206834ce27bcSVasu Dev mutex_unlock(&fcoe_config_mutex); 206934ce27bcSVasu Dev return restart_syscall(); 207034ce27bcSVasu Dev } 207134ce27bcSVasu Dev 20722e70e241SChris Leech fcoe = fcoe_hostlist_lookup_port(netdev); 20732e70e241SChris Leech if (!fcoe) { 2074090eb6c4SChris Leech rtnl_unlock(); 2075a703e490SVasu Dev rc = -ENODEV; 2076a703e490SVasu Dev goto out_putdev; 2077a703e490SVasu Dev } 20782e70e241SChris Leech fcoe_interface_cleanup(fcoe); 207954a5b21dSYi Zou list_del(&fcoe->list); 208034ce27bcSVasu Dev /* RTNL mutex is dropped by fcoe_if_destroy */ 20812e70e241SChris Leech fcoe_if_destroy(fcoe->ctlr.lp); 20826409ea65SRob Love 2083a703e490SVasu Dev out_putdev: 2084a703e490SVasu Dev dev_put(netdev); 2085a703e490SVasu Dev out_nodev: 2086dfc1d0feSChris Leech mutex_unlock(&fcoe_config_mutex); 2087a703e490SVasu Dev return rc; 2088a703e490SVasu Dev } 2089a703e490SVasu Dev 20901875f27eSRobert Love /** 20911875f27eSRobert Love * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context 20921875f27eSRobert Love * @work: Handle to the FCoE port to be destroyed 20931875f27eSRobert Love */ 20942e70e241SChris Leech static void fcoe_destroy_work(struct work_struct *work) 20952e70e241SChris Leech { 20962e70e241SChris Leech struct fcoe_port *port; 20972e70e241SChris Leech 20982e70e241SChris Leech port = container_of(work, struct fcoe_port, destroy_work); 20992e70e241SChris Leech mutex_lock(&fcoe_config_mutex); 210034ce27bcSVasu Dev rtnl_lock(); 210134ce27bcSVasu Dev /* RTNL mutex is dropped by fcoe_if_destroy */ 21022e70e241SChris Leech fcoe_if_destroy(port->lport); 21032e70e241SChris Leech mutex_unlock(&fcoe_config_mutex); 21042e70e241SChris Leech } 21052e70e241SChris Leech 2106a703e490SVasu Dev /** 21071875f27eSRobert Love * fcoe_create() - Create a fcoe interface 21081875f27eSRobert Love * @buffer: The name of the Ethernet interface to create on 21091875f27eSRobert Love * @kp: The associated kernel param 21101875f27eSRobert Love * 21111875f27eSRobert Love * Called from sysfs. 2112a703e490SVasu Dev * 2113a703e490SVasu Dev * Returns: 0 for success 2114a703e490SVasu Dev */ 2115a703e490SVasu Dev static int fcoe_create(const char *buffer, struct kernel_param *kp) 2116a703e490SVasu Dev { 21171dd454d9SJoe Eykholt enum fip_state fip_mode = (enum fip_state)(long)kp->arg; 2118a703e490SVasu Dev int rc; 2119030f4e00SChris Leech struct fcoe_interface *fcoe; 2120af7f85d9SChris Leech struct fc_lport *lport; 2121a703e490SVasu Dev struct net_device *netdev; 2122a703e490SVasu Dev 2123dfc1d0feSChris Leech mutex_lock(&fcoe_config_mutex); 212434ce27bcSVasu Dev 212534ce27bcSVasu Dev if (!rtnl_trylock()) { 212634ce27bcSVasu Dev mutex_unlock(&fcoe_config_mutex); 212734ce27bcSVasu Dev return restart_syscall(); 212834ce27bcSVasu Dev } 212934ce27bcSVasu Dev 2130dfc1d0feSChris Leech #ifdef CONFIG_FCOE_MODULE 2131dfc1d0feSChris Leech /* 2132dfc1d0feSChris Leech * Make sure the module has been initialized, and is not about to be 2133dfc1d0feSChris Leech * removed. Module paramter sysfs files are writable before the 2134dfc1d0feSChris Leech * module_init function is called and after module_exit. 2135dfc1d0feSChris Leech */ 2136dfc1d0feSChris Leech if (THIS_MODULE->state != MODULE_STATE_LIVE) { 2137dfc1d0feSChris Leech rc = -ENODEV; 2138721cafafSVasu Dev goto out_nomod; 2139dfc1d0feSChris Leech } 2140dfc1d0feSChris Leech #endif 2141dfc1d0feSChris Leech 21426409ea65SRob Love if (!try_module_get(THIS_MODULE)) { 21436409ea65SRob Love rc = -EINVAL; 21446409ea65SRob Love goto out_nomod; 21456409ea65SRob Love } 21466409ea65SRob Love 2147a703e490SVasu Dev netdev = fcoe_if_to_netdev(buffer); 2148a703e490SVasu Dev if (!netdev) { 2149a703e490SVasu Dev rc = -ENODEV; 2150a703e490SVasu Dev goto out_nodev; 2151a703e490SVasu Dev } 21522e70e241SChris Leech 2153a703e490SVasu Dev /* look for existing lport */ 2154a703e490SVasu Dev if (fcoe_hostlist_lookup(netdev)) { 2155a703e490SVasu Dev rc = -EEXIST; 2156a703e490SVasu Dev goto out_putdev; 2157a703e490SVasu Dev } 2158a703e490SVasu Dev 21591dd454d9SJoe Eykholt fcoe = fcoe_interface_create(netdev, fip_mode); 2160030f4e00SChris Leech if (!fcoe) { 2161030f4e00SChris Leech rc = -ENOMEM; 2162030f4e00SChris Leech goto out_putdev; 2163030f4e00SChris Leech } 2164030f4e00SChris Leech 21659a05753bSChris Leech lport = fcoe_if_create(fcoe, &netdev->dev, 0); 2166af7f85d9SChris Leech if (IS_ERR(lport)) { 2167d5488eb9SRobert Love printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", 2168a703e490SVasu Dev netdev->name); 2169a703e490SVasu Dev rc = -EIO; 21702e70e241SChris Leech fcoe_interface_cleanup(fcoe); 2171030f4e00SChris Leech goto out_free; 2172a703e490SVasu Dev } 2173030f4e00SChris Leech 217454b649f8SChris Leech /* Make this the "master" N_Port */ 217554b649f8SChris Leech fcoe->ctlr.lp = lport; 2176030f4e00SChris Leech 2177c863df33SChris Leech /* add to lports list */ 2178c863df33SChris Leech fcoe_hostlist_add(lport); 2179c863df33SChris Leech 218054b649f8SChris Leech /* start FIP Discovery and FLOGI */ 218154b649f8SChris Leech lport->boot_time = jiffies; 218254b649f8SChris Leech fc_fabric_login(lport); 218354b649f8SChris Leech if (!fcoe_link_ok(lport)) 218454b649f8SChris Leech fcoe_ctlr_link_up(&fcoe->ctlr); 218554b649f8SChris Leech 218654b649f8SChris Leech /* 218754b649f8SChris Leech * Release from init in fcoe_interface_create(), on success lport 218854b649f8SChris Leech * should be holding a reference taken in fcoe_if_create(). 218954b649f8SChris Leech */ 2190030f4e00SChris Leech fcoe_interface_put(fcoe); 21916409ea65SRob Love dev_put(netdev); 21926409ea65SRob Love rtnl_unlock(); 21936409ea65SRob Love mutex_unlock(&fcoe_config_mutex); 21946409ea65SRob Love 21956409ea65SRob Love return 0; 21966409ea65SRob Love out_free: 21976409ea65SRob Love fcoe_interface_put(fcoe); 2198a703e490SVasu Dev out_putdev: 2199a703e490SVasu Dev dev_put(netdev); 2200a703e490SVasu Dev out_nodev: 22016409ea65SRob Love module_put(THIS_MODULE); 22026409ea65SRob Love out_nomod: 220334ce27bcSVasu Dev rtnl_unlock(); 2204dfc1d0feSChris Leech mutex_unlock(&fcoe_config_mutex); 2205a703e490SVasu Dev return rc; 2206a703e490SVasu Dev } 2207a703e490SVasu Dev 2208a703e490SVasu Dev /** 22095e4f8fe7SRobert Love * fcoe_link_speed_update() - Update the supported and actual link speeds 22105e4f8fe7SRobert Love * @lport: The local port to update speeds for 2211a703e490SVasu Dev * 22125e4f8fe7SRobert Love * Returns: 0 if the ethtool query was successful 22135e4f8fe7SRobert Love * -1 if the ethtool query failed 2214a703e490SVasu Dev */ 22155e4f8fe7SRobert Love int fcoe_link_speed_update(struct fc_lport *lport) 2216a703e490SVasu Dev { 22171875f27eSRobert Love struct fcoe_port *port = lport_priv(lport); 22181875f27eSRobert Love struct net_device *netdev = port->fcoe->netdev; 2219a703e490SVasu Dev struct ethtool_cmd ecmd = { ETHTOOL_GSET }; 2220a703e490SVasu Dev 22215e4f8fe7SRobert Love if (!dev_ethtool_get_settings(netdev, &ecmd)) { 22221875f27eSRobert Love lport->link_supported_speeds &= 2223a703e490SVasu Dev ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT); 2224a703e490SVasu Dev if (ecmd.supported & (SUPPORTED_1000baseT_Half | 2225a703e490SVasu Dev SUPPORTED_1000baseT_Full)) 22261875f27eSRobert Love lport->link_supported_speeds |= FC_PORTSPEED_1GBIT; 2227a703e490SVasu Dev if (ecmd.supported & SUPPORTED_10000baseT_Full) 22281875f27eSRobert Love lport->link_supported_speeds |= 2229a703e490SVasu Dev FC_PORTSPEED_10GBIT; 2230a703e490SVasu Dev if (ecmd.speed == SPEED_1000) 22311875f27eSRobert Love lport->link_speed = FC_PORTSPEED_1GBIT; 2232a703e490SVasu Dev if (ecmd.speed == SPEED_10000) 22331875f27eSRobert Love lport->link_speed = FC_PORTSPEED_10GBIT; 2234a703e490SVasu Dev 22352f718d64SYi Zou return 0; 22362f718d64SYi Zou } 22372f718d64SYi Zou return -1; 2238a703e490SVasu Dev } 2239a703e490SVasu Dev 2240a703e490SVasu Dev /** 22415e4f8fe7SRobert Love * fcoe_link_ok() - Check if the link is OK for a local port 22425e4f8fe7SRobert Love * @lport: The local port to check link on 22435e4f8fe7SRobert Love * 22445e4f8fe7SRobert Love * Returns: 0 if link is UP and OK, -1 if not 22455e4f8fe7SRobert Love * 22465e4f8fe7SRobert Love */ 22475e4f8fe7SRobert Love int fcoe_link_ok(struct fc_lport *lport) 22485e4f8fe7SRobert Love { 22495e4f8fe7SRobert Love struct fcoe_port *port = lport_priv(lport); 22505e4f8fe7SRobert Love struct net_device *netdev = port->fcoe->netdev; 22515e4f8fe7SRobert Love 22525e4f8fe7SRobert Love if (netif_oper_up(netdev)) 22535e4f8fe7SRobert Love return 0; 22545e4f8fe7SRobert Love return -1; 22555e4f8fe7SRobert Love } 22565e4f8fe7SRobert Love 22575e4f8fe7SRobert Love /** 22581875f27eSRobert Love * fcoe_percpu_clean() - Clear all pending skbs for an local port 22591875f27eSRobert Love * @lport: The local port whose skbs are to be cleared 2260e7a51997SJoe Eykholt * 2261e7a51997SJoe Eykholt * Must be called with fcoe_create_mutex held to single-thread completion. 2262e7a51997SJoe Eykholt * 2263e7a51997SJoe Eykholt * This flushes the pending skbs by adding a new skb to each queue and 2264e7a51997SJoe Eykholt * waiting until they are all freed. This assures us that not only are 2265e7a51997SJoe Eykholt * there no packets that will be handled by the lport, but also that any 2266e7a51997SJoe Eykholt * threads already handling packet have returned. 2267a703e490SVasu Dev */ 22681875f27eSRobert Love void fcoe_percpu_clean(struct fc_lport *lport) 2269a703e490SVasu Dev { 2270a703e490SVasu Dev struct fcoe_percpu_s *pp; 2271a703e490SVasu Dev struct fcoe_rcv_info *fr; 2272a703e490SVasu Dev struct sk_buff_head *list; 2273a703e490SVasu Dev struct sk_buff *skb, *next; 2274a703e490SVasu Dev struct sk_buff *head; 2275a703e490SVasu Dev unsigned int cpu; 2276a703e490SVasu Dev 2277a703e490SVasu Dev for_each_possible_cpu(cpu) { 2278a703e490SVasu Dev pp = &per_cpu(fcoe_percpu, cpu); 2279a703e490SVasu Dev spin_lock_bh(&pp->fcoe_rx_list.lock); 2280a703e490SVasu Dev list = &pp->fcoe_rx_list; 2281a703e490SVasu Dev head = list->next; 2282a703e490SVasu Dev for (skb = head; skb != (struct sk_buff *)list; 2283a703e490SVasu Dev skb = next) { 2284a703e490SVasu Dev next = skb->next; 2285a703e490SVasu Dev fr = fcoe_dev_from_skb(skb); 22861875f27eSRobert Love if (fr->fr_dev == lport) { 2287a703e490SVasu Dev __skb_unlink(skb, list); 2288a703e490SVasu Dev kfree_skb(skb); 2289a703e490SVasu Dev } 2290a703e490SVasu Dev } 2291e7a51997SJoe Eykholt 2292e7a51997SJoe Eykholt if (!pp->thread || !cpu_online(cpu)) { 2293a703e490SVasu Dev spin_unlock_bh(&pp->fcoe_rx_list.lock); 2294e7a51997SJoe Eykholt continue; 2295e7a51997SJoe Eykholt } 2296e7a51997SJoe Eykholt 2297e7a51997SJoe Eykholt skb = dev_alloc_skb(0); 2298e7a51997SJoe Eykholt if (!skb) { 2299e7a51997SJoe Eykholt spin_unlock_bh(&pp->fcoe_rx_list.lock); 2300e7a51997SJoe Eykholt continue; 2301e7a51997SJoe Eykholt } 2302e7a51997SJoe Eykholt skb->destructor = fcoe_percpu_flush_done; 2303e7a51997SJoe Eykholt 2304e7a51997SJoe Eykholt __skb_queue_tail(&pp->fcoe_rx_list, skb); 2305e7a51997SJoe Eykholt if (pp->fcoe_rx_list.qlen == 1) 2306e7a51997SJoe Eykholt wake_up_process(pp->thread); 2307e7a51997SJoe Eykholt spin_unlock_bh(&pp->fcoe_rx_list.lock); 2308e7a51997SJoe Eykholt 2309e7a51997SJoe Eykholt wait_for_completion(&fcoe_flush_completion); 2310a703e490SVasu Dev } 2311a703e490SVasu Dev } 2312a703e490SVasu Dev 2313a703e490SVasu Dev /** 2314a703e490SVasu Dev * fcoe_clean_pending_queue() - Dequeue a skb and free it 23151875f27eSRobert Love * @lport: The local port to dequeue a skb on 2316a703e490SVasu Dev */ 23171875f27eSRobert Love void fcoe_clean_pending_queue(struct fc_lport *lport) 2318a703e490SVasu Dev { 23191875f27eSRobert Love struct fcoe_port *port = lport_priv(lport); 2320a703e490SVasu Dev struct sk_buff *skb; 2321a703e490SVasu Dev 2322014f5c3fSChris Leech spin_lock_bh(&port->fcoe_pending_queue.lock); 2323014f5c3fSChris Leech while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) { 2324014f5c3fSChris Leech spin_unlock_bh(&port->fcoe_pending_queue.lock); 2325a703e490SVasu Dev kfree_skb(skb); 2326014f5c3fSChris Leech spin_lock_bh(&port->fcoe_pending_queue.lock); 2327a703e490SVasu Dev } 2328014f5c3fSChris Leech spin_unlock_bh(&port->fcoe_pending_queue.lock); 2329a703e490SVasu Dev } 2330a703e490SVasu Dev 2331a703e490SVasu Dev /** 23321875f27eSRobert Love * fcoe_reset() - Reset a local port 23331875f27eSRobert Love * @shost: The SCSI host associated with the local port to be reset 2334a703e490SVasu Dev * 23351875f27eSRobert Love * Returns: Always 0 (return value required by FC transport template) 2336a703e490SVasu Dev */ 2337a703e490SVasu Dev int fcoe_reset(struct Scsi_Host *shost) 2338a703e490SVasu Dev { 2339a703e490SVasu Dev struct fc_lport *lport = shost_priv(shost); 2340a703e490SVasu Dev fc_lport_reset(lport); 2341a703e490SVasu Dev return 0; 2342a703e490SVasu Dev } 2343a703e490SVasu Dev 2344a703e490SVasu Dev /** 23451875f27eSRobert Love * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device 23461875f27eSRobert Love * @netdev: The net device used as a key 2347a703e490SVasu Dev * 23481875f27eSRobert Love * Locking: Must be called with the RNL mutex held. 23491875f27eSRobert Love * 23501875f27eSRobert Love * Returns: NULL or the FCoE interface 2351a703e490SVasu Dev */ 2352014f5c3fSChris Leech static struct fcoe_interface * 23531875f27eSRobert Love fcoe_hostlist_lookup_port(const struct net_device *netdev) 2354a703e490SVasu Dev { 2355014f5c3fSChris Leech struct fcoe_interface *fcoe; 2356a703e490SVasu Dev 2357014f5c3fSChris Leech list_for_each_entry(fcoe, &fcoe_hostlist, list) { 23581875f27eSRobert Love if (fcoe->netdev == netdev) 2359014f5c3fSChris Leech return fcoe; 2360a703e490SVasu Dev } 2361a703e490SVasu Dev return NULL; 2362a703e490SVasu Dev } 2363a703e490SVasu Dev 2364a703e490SVasu Dev /** 23651875f27eSRobert Love * fcoe_hostlist_lookup() - Find the local port associated with a 23661875f27eSRobert Love * given net device 23671875f27eSRobert Love * @netdev: The netdevice used as a key 2368a703e490SVasu Dev * 23691875f27eSRobert Love * Locking: Must be called with the RTNL mutex held 23701875f27eSRobert Love * 23711875f27eSRobert Love * Returns: NULL or the local port 2372a703e490SVasu Dev */ 2373090eb6c4SChris Leech static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) 2374a703e490SVasu Dev { 2375014f5c3fSChris Leech struct fcoe_interface *fcoe; 2376a703e490SVasu Dev 2377014f5c3fSChris Leech fcoe = fcoe_hostlist_lookup_port(netdev); 23783fe9a0baSChris Leech return (fcoe) ? fcoe->ctlr.lp : NULL; 2379a703e490SVasu Dev } 2380a703e490SVasu Dev 2381a703e490SVasu Dev /** 23821875f27eSRobert Love * fcoe_hostlist_add() - Add the FCoE interface identified by a local 23831875f27eSRobert Love * port to the hostlist 23841875f27eSRobert Love * @lport: The local port that identifies the FCoE interface to be added 23851875f27eSRobert Love * 23861875f27eSRobert Love * Locking: must be called with the RTNL mutex held 2387a703e490SVasu Dev * 2388a703e490SVasu Dev * Returns: 0 for success 2389a703e490SVasu Dev */ 2390090eb6c4SChris Leech static int fcoe_hostlist_add(const struct fc_lport *lport) 2391a703e490SVasu Dev { 2392014f5c3fSChris Leech struct fcoe_interface *fcoe; 2393014f5c3fSChris Leech struct fcoe_port *port; 2394a703e490SVasu Dev 2395014f5c3fSChris Leech fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); 2396014f5c3fSChris Leech if (!fcoe) { 2397014f5c3fSChris Leech port = lport_priv(lport); 2398014f5c3fSChris Leech fcoe = port->fcoe; 2399014f5c3fSChris Leech list_add_tail(&fcoe->list, &fcoe_hostlist); 2400a703e490SVasu Dev } 2401a703e490SVasu Dev return 0; 2402a703e490SVasu Dev } 2403a703e490SVasu Dev 2404a703e490SVasu Dev /** 24051875f27eSRobert Love * fcoe_init() - Initialize fcoe.ko 2406a703e490SVasu Dev * 24071875f27eSRobert Love * Returns: 0 on success, or a negative value on failure 2408a703e490SVasu Dev */ 2409a703e490SVasu Dev static int __init fcoe_init(void) 2410a703e490SVasu Dev { 24111875f27eSRobert Love struct fcoe_percpu_s *p; 2412a703e490SVasu Dev unsigned int cpu; 2413a703e490SVasu Dev int rc = 0; 2414a703e490SVasu Dev 2415dfc1d0feSChris Leech mutex_lock(&fcoe_config_mutex); 2416dfc1d0feSChris Leech 2417a703e490SVasu Dev for_each_possible_cpu(cpu) { 2418a703e490SVasu Dev p = &per_cpu(fcoe_percpu, cpu); 2419a703e490SVasu Dev skb_queue_head_init(&p->fcoe_rx_list); 2420a703e490SVasu Dev } 2421a703e490SVasu Dev 2422a703e490SVasu Dev for_each_online_cpu(cpu) 2423a703e490SVasu Dev fcoe_percpu_thread_create(cpu); 2424a703e490SVasu Dev 2425a703e490SVasu Dev /* Initialize per CPU interrupt thread */ 2426a703e490SVasu Dev rc = register_hotcpu_notifier(&fcoe_cpu_notifier); 2427a703e490SVasu Dev if (rc) 2428a703e490SVasu Dev goto out_free; 2429a703e490SVasu Dev 2430a703e490SVasu Dev /* Setup link change notification */ 2431a703e490SVasu Dev fcoe_dev_setup(); 2432a703e490SVasu Dev 24335892c32fSChris Leech rc = fcoe_if_init(); 24345892c32fSChris Leech if (rc) 24355892c32fSChris Leech goto out_free; 2436a703e490SVasu Dev 2437dfc1d0feSChris Leech mutex_unlock(&fcoe_config_mutex); 2438a703e490SVasu Dev return 0; 2439a703e490SVasu Dev 2440a703e490SVasu Dev out_free: 2441a703e490SVasu Dev for_each_online_cpu(cpu) { 2442a703e490SVasu Dev fcoe_percpu_thread_destroy(cpu); 2443a703e490SVasu Dev } 2444dfc1d0feSChris Leech mutex_unlock(&fcoe_config_mutex); 2445a703e490SVasu Dev return rc; 2446a703e490SVasu Dev } 2447a703e490SVasu Dev module_init(fcoe_init); 2448a703e490SVasu Dev 2449a703e490SVasu Dev /** 24501875f27eSRobert Love * fcoe_exit() - Clean up fcoe.ko 2451a703e490SVasu Dev * 24521875f27eSRobert Love * Returns: 0 on success or a negative value on failure 2453a703e490SVasu Dev */ 2454a703e490SVasu Dev static void __exit fcoe_exit(void) 2455a703e490SVasu Dev { 2456014f5c3fSChris Leech struct fcoe_interface *fcoe, *tmp; 24572e70e241SChris Leech struct fcoe_port *port; 24581875f27eSRobert Love unsigned int cpu; 2459a703e490SVasu Dev 2460dfc1d0feSChris Leech mutex_lock(&fcoe_config_mutex); 2461dfc1d0feSChris Leech 2462a703e490SVasu Dev fcoe_dev_cleanup(); 2463a703e490SVasu Dev 2464a703e490SVasu Dev /* releases the associated fcoe hosts */ 2465090eb6c4SChris Leech rtnl_lock(); 2466090eb6c4SChris Leech list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { 2467c863df33SChris Leech list_del(&fcoe->list); 24682e70e241SChris Leech port = lport_priv(fcoe->ctlr.lp); 24692e70e241SChris Leech fcoe_interface_cleanup(fcoe); 24702e70e241SChris Leech schedule_work(&port->destroy_work); 2471c863df33SChris Leech } 2472090eb6c4SChris Leech rtnl_unlock(); 2473a703e490SVasu Dev 2474a703e490SVasu Dev unregister_hotcpu_notifier(&fcoe_cpu_notifier); 2475a703e490SVasu Dev 2476014f5c3fSChris Leech for_each_online_cpu(cpu) 2477a703e490SVasu Dev fcoe_percpu_thread_destroy(cpu); 2478a703e490SVasu Dev 2479dfc1d0feSChris Leech mutex_unlock(&fcoe_config_mutex); 24802e70e241SChris Leech 24812e70e241SChris Leech /* flush any asyncronous interface destroys, 24822e70e241SChris Leech * this should happen after the netdev notifier is unregistered */ 24832e70e241SChris Leech flush_scheduled_work(); 24849a05753bSChris Leech /* That will flush out all the N_Ports on the hostlist, but now we 24859a05753bSChris Leech * may have NPIV VN_Ports scheduled for destruction */ 24869a05753bSChris Leech flush_scheduled_work(); 24872e70e241SChris Leech 24882e70e241SChris Leech /* detach from scsi transport 24892e70e241SChris Leech * must happen after all destroys are done, therefor after the flush */ 24902e70e241SChris Leech fcoe_if_exit(); 2491a703e490SVasu Dev } 2492a703e490SVasu Dev module_exit(fcoe_exit); 249311b56188SChris Leech 249411b56188SChris Leech /** 249511b56188SChris Leech * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler 249611b56188SChris Leech * @seq: active sequence in the FLOGI or FDISC exchange 249711b56188SChris Leech * @fp: response frame, or error encoded in a pointer (timeout) 249811b56188SChris Leech * @arg: pointer the the fcoe_ctlr structure 249911b56188SChris Leech * 250065155b37SUwe Kleine-König * This handles MAC address management for FCoE, then passes control on to 250111b56188SChris Leech * the libfc FLOGI response handler. 250211b56188SChris Leech */ 250311b56188SChris Leech static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) 250411b56188SChris Leech { 250511b56188SChris Leech struct fcoe_ctlr *fip = arg; 250611b56188SChris Leech struct fc_exch *exch = fc_seq_exch(seq); 250711b56188SChris Leech struct fc_lport *lport = exch->lp; 250811b56188SChris Leech u8 *mac; 250911b56188SChris Leech 251011b56188SChris Leech if (IS_ERR(fp)) 251111b56188SChris Leech goto done; 251211b56188SChris Leech 251311b56188SChris Leech mac = fr_cb(fp)->granted_mac; 251411b56188SChris Leech if (is_zero_ether_addr(mac)) { 251511b56188SChris Leech /* pre-FIP */ 2516386309ceSJoe Eykholt if (fcoe_ctlr_recv_flogi(fip, lport, fp)) { 251711b56188SChris Leech fc_frame_free(fp); 251811b56188SChris Leech return; 251911b56188SChris Leech } 252011b56188SChris Leech } 2521386309ceSJoe Eykholt fcoe_update_src_mac(lport, mac); 252211b56188SChris Leech done: 252311b56188SChris Leech fc_lport_flogi_resp(seq, fp, lport); 252411b56188SChris Leech } 252511b56188SChris Leech 252611b56188SChris Leech /** 252711b56188SChris Leech * fcoe_logo_resp() - FCoE specific LOGO response handler 252811b56188SChris Leech * @seq: active sequence in the LOGO exchange 252911b56188SChris Leech * @fp: response frame, or error encoded in a pointer (timeout) 253011b56188SChris Leech * @arg: pointer the the fcoe_ctlr structure 253111b56188SChris Leech * 253265155b37SUwe Kleine-König * This handles MAC address management for FCoE, then passes control on to 253311b56188SChris Leech * the libfc LOGO response handler. 253411b56188SChris Leech */ 253511b56188SChris Leech static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) 253611b56188SChris Leech { 2537386309ceSJoe Eykholt struct fc_lport *lport = arg; 253811b56188SChris Leech static u8 zero_mac[ETH_ALEN] = { 0 }; 253911b56188SChris Leech 254011b56188SChris Leech if (!IS_ERR(fp)) 2541386309ceSJoe Eykholt fcoe_update_src_mac(lport, zero_mac); 254211b56188SChris Leech fc_lport_logo_resp(seq, fp, lport); 254311b56188SChris Leech } 254411b56188SChris Leech 254511b56188SChris Leech /** 254611b56188SChris Leech * fcoe_elsct_send - FCoE specific ELS handler 254711b56188SChris Leech * 254811b56188SChris Leech * This does special case handling of FIP encapsualted ELS exchanges for FCoE, 254911b56188SChris Leech * using FCoE specific response handlers and passing the FIP controller as 255011b56188SChris Leech * the argument (the lport is still available from the exchange). 255111b56188SChris Leech * 255211b56188SChris Leech * Most of the work here is just handed off to the libfc routine. 255311b56188SChris Leech */ 25541875f27eSRobert Love static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, 25551875f27eSRobert Love struct fc_frame *fp, unsigned int op, 25561875f27eSRobert Love void (*resp)(struct fc_seq *, 25571875f27eSRobert Love struct fc_frame *, 25581875f27eSRobert Love void *), 255911b56188SChris Leech void *arg, u32 timeout) 256011b56188SChris Leech { 256111b56188SChris Leech struct fcoe_port *port = lport_priv(lport); 256211b56188SChris Leech struct fcoe_interface *fcoe = port->fcoe; 256311b56188SChris Leech struct fcoe_ctlr *fip = &fcoe->ctlr; 256411b56188SChris Leech struct fc_frame_header *fh = fc_frame_header_get(fp); 256511b56188SChris Leech 256611b56188SChris Leech switch (op) { 256711b56188SChris Leech case ELS_FLOGI: 256811b56188SChris Leech case ELS_FDISC: 2569e10f8c66SJoe Eykholt if (lport->point_to_multipoint) 2570e10f8c66SJoe Eykholt break; 257111b56188SChris Leech return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, 257211b56188SChris Leech fip, timeout); 257311b56188SChris Leech case ELS_LOGO: 257411b56188SChris Leech /* only hook onto fabric logouts, not port logouts */ 257511b56188SChris Leech if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) 257611b56188SChris Leech break; 257711b56188SChris Leech return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, 2578386309ceSJoe Eykholt lport, timeout); 257911b56188SChris Leech } 258011b56188SChris Leech return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); 258111b56188SChris Leech } 258211b56188SChris Leech 25839a05753bSChris Leech /** 25849a05753bSChris Leech * fcoe_vport_create() - create an fc_host/scsi_host for a vport 25859a05753bSChris Leech * @vport: fc_vport object to create a new fc_host for 25869a05753bSChris Leech * @disabled: start the new fc_host in a disabled state by default? 25879a05753bSChris Leech * 25889a05753bSChris Leech * Returns: 0 for success 25899a05753bSChris Leech */ 25909a05753bSChris Leech static int fcoe_vport_create(struct fc_vport *vport, bool disabled) 25919a05753bSChris Leech { 25929a05753bSChris Leech struct Scsi_Host *shost = vport_to_shost(vport); 25939a05753bSChris Leech struct fc_lport *n_port = shost_priv(shost); 25949a05753bSChris Leech struct fcoe_port *port = lport_priv(n_port); 25959a05753bSChris Leech struct fcoe_interface *fcoe = port->fcoe; 25969a05753bSChris Leech struct net_device *netdev = fcoe->netdev; 25979a05753bSChris Leech struct fc_lport *vn_port; 25989a05753bSChris Leech 25999a05753bSChris Leech mutex_lock(&fcoe_config_mutex); 26009a05753bSChris Leech vn_port = fcoe_if_create(fcoe, &vport->dev, 1); 26019a05753bSChris Leech mutex_unlock(&fcoe_config_mutex); 26029a05753bSChris Leech 26039a05753bSChris Leech if (IS_ERR(vn_port)) { 26049a05753bSChris Leech printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", 26059a05753bSChris Leech netdev->name); 26069a05753bSChris Leech return -EIO; 26079a05753bSChris Leech } 26089a05753bSChris Leech 26099a05753bSChris Leech if (disabled) { 26109a05753bSChris Leech fc_vport_set_state(vport, FC_VPORT_DISABLED); 26119a05753bSChris Leech } else { 26129a05753bSChris Leech vn_port->boot_time = jiffies; 26139a05753bSChris Leech fc_fabric_login(vn_port); 26149a05753bSChris Leech fc_vport_setlink(vn_port); 26159a05753bSChris Leech } 26169a05753bSChris Leech return 0; 26179a05753bSChris Leech } 26189a05753bSChris Leech 26199a05753bSChris Leech /** 26209a05753bSChris Leech * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport 26219a05753bSChris Leech * @vport: fc_vport object that is being destroyed 26229a05753bSChris Leech * 26239a05753bSChris Leech * Returns: 0 for success 26249a05753bSChris Leech */ 26259a05753bSChris Leech static int fcoe_vport_destroy(struct fc_vport *vport) 26269a05753bSChris Leech { 26279a05753bSChris Leech struct Scsi_Host *shost = vport_to_shost(vport); 26289a05753bSChris Leech struct fc_lport *n_port = shost_priv(shost); 26299a05753bSChris Leech struct fc_lport *vn_port = vport->dd_data; 26309a05753bSChris Leech struct fcoe_port *port = lport_priv(vn_port); 26319a05753bSChris Leech 26329a05753bSChris Leech mutex_lock(&n_port->lp_mutex); 26339a05753bSChris Leech list_del(&vn_port->list); 26349a05753bSChris Leech mutex_unlock(&n_port->lp_mutex); 26359a05753bSChris Leech schedule_work(&port->destroy_work); 26369a05753bSChris Leech return 0; 26379a05753bSChris Leech } 26389a05753bSChris Leech 26399a05753bSChris Leech /** 26409a05753bSChris Leech * fcoe_vport_disable() - change vport state 26419a05753bSChris Leech * @vport: vport to bring online/offline 26429a05753bSChris Leech * @disable: should the vport be disabled? 26439a05753bSChris Leech */ 26449a05753bSChris Leech static int fcoe_vport_disable(struct fc_vport *vport, bool disable) 26459a05753bSChris Leech { 26469a05753bSChris Leech struct fc_lport *lport = vport->dd_data; 26479a05753bSChris Leech 26489a05753bSChris Leech if (disable) { 26499a05753bSChris Leech fc_vport_set_state(vport, FC_VPORT_DISABLED); 26509a05753bSChris Leech fc_fabric_logoff(lport); 26519a05753bSChris Leech } else { 26529a05753bSChris Leech lport->boot_time = jiffies; 26539a05753bSChris Leech fc_fabric_login(lport); 26549a05753bSChris Leech fc_vport_setlink(lport); 26559a05753bSChris Leech } 26569a05753bSChris Leech 26579a05753bSChris Leech return 0; 26589a05753bSChris Leech } 26599a05753bSChris Leech 2660dc8596d3SChris Leech /** 2661dc8596d3SChris Leech * fcoe_vport_set_symbolic_name() - append vport string to symbolic name 2662dc8596d3SChris Leech * @vport: fc_vport with a new symbolic name string 2663dc8596d3SChris Leech * 2664dc8596d3SChris Leech * After generating a new symbolic name string, a new RSPN_ID request is 2665dc8596d3SChris Leech * sent to the name server. There is no response handler, so if it fails 2666dc8596d3SChris Leech * for some reason it will not be retried. 2667dc8596d3SChris Leech */ 2668dc8596d3SChris Leech static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) 2669dc8596d3SChris Leech { 2670dc8596d3SChris Leech struct fc_lport *lport = vport->dd_data; 2671dc8596d3SChris Leech struct fc_frame *fp; 2672dc8596d3SChris Leech size_t len; 2673dc8596d3SChris Leech 2674dc8596d3SChris Leech snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, 2675dc8596d3SChris Leech "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, 2676dc8596d3SChris Leech fcoe_netdev(lport)->name, vport->symbolic_name); 2677dc8596d3SChris Leech 2678dc8596d3SChris Leech if (lport->state != LPORT_ST_READY) 2679dc8596d3SChris Leech return; 2680dc8596d3SChris Leech 2681dc8596d3SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 2682dc8596d3SChris Leech fp = fc_frame_alloc(lport, 2683dc8596d3SChris Leech sizeof(struct fc_ct_hdr) + 2684dc8596d3SChris Leech sizeof(struct fc_ns_rspn) + len); 2685dc8596d3SChris Leech if (!fp) 2686dc8596d3SChris Leech return; 2687dc8596d3SChris Leech lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, 2688b94f8951SJoe Eykholt NULL, NULL, 3 * lport->r_a_tov); 2689dc8596d3SChris Leech } 2690b84056bfSYi Zou 2691b84056bfSYi Zou /** 2692b84056bfSYi Zou * fcoe_get_lesb() - Fill the FCoE Link Error Status Block 2693b84056bfSYi Zou * @lport: the local port 2694b84056bfSYi Zou * @fc_lesb: the link error status block 2695b84056bfSYi Zou */ 2696b84056bfSYi Zou static void fcoe_get_lesb(struct fc_lport *lport, 2697b84056bfSYi Zou struct fc_els_lesb *fc_lesb) 2698b84056bfSYi Zou { 2699b84056bfSYi Zou unsigned int cpu; 2700b84056bfSYi Zou u32 lfc, vlfc, mdac; 2701b84056bfSYi Zou struct fcoe_dev_stats *devst; 2702b84056bfSYi Zou struct fcoe_fc_els_lesb *lesb; 270328172739SEric Dumazet struct rtnl_link_stats64 temp; 2704b84056bfSYi Zou struct net_device *netdev = fcoe_netdev(lport); 2705b84056bfSYi Zou 2706b84056bfSYi Zou lfc = 0; 2707b84056bfSYi Zou vlfc = 0; 2708b84056bfSYi Zou mdac = 0; 2709b84056bfSYi Zou lesb = (struct fcoe_fc_els_lesb *)fc_lesb; 2710b84056bfSYi Zou memset(lesb, 0, sizeof(*lesb)); 2711b84056bfSYi Zou for_each_possible_cpu(cpu) { 2712b84056bfSYi Zou devst = per_cpu_ptr(lport->dev_stats, cpu); 2713b84056bfSYi Zou lfc += devst->LinkFailureCount; 2714b84056bfSYi Zou vlfc += devst->VLinkFailureCount; 2715b84056bfSYi Zou mdac += devst->MissDiscAdvCount; 2716b84056bfSYi Zou } 2717b84056bfSYi Zou lesb->lesb_link_fail = htonl(lfc); 2718b84056bfSYi Zou lesb->lesb_vlink_fail = htonl(vlfc); 2719b84056bfSYi Zou lesb->lesb_miss_fka = htonl(mdac); 272028172739SEric Dumazet lesb->lesb_fcs_error = htonl(dev_get_stats(netdev, &temp)->rx_crc_errors); 2721b84056bfSYi Zou } 27227d65b0dfSJoe Eykholt 27237d65b0dfSJoe Eykholt /** 27247d65b0dfSJoe Eykholt * fcoe_set_port_id() - Callback from libfc when Port_ID is set. 27257d65b0dfSJoe Eykholt * @lport: the local port 27267d65b0dfSJoe Eykholt * @port_id: the port ID 27277d65b0dfSJoe Eykholt * @fp: the received frame, if any, that caused the port_id to be set. 27287d65b0dfSJoe Eykholt * 27297d65b0dfSJoe Eykholt * This routine handles the case where we received a FLOGI and are 27307d65b0dfSJoe Eykholt * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi() 27317d65b0dfSJoe Eykholt * so it can set the non-mapped mode and gateway address. 27327d65b0dfSJoe Eykholt * 27337d65b0dfSJoe Eykholt * The FLOGI LS_ACC is handled by fcoe_flogi_resp(). 27347d65b0dfSJoe Eykholt */ 27357d65b0dfSJoe Eykholt static void fcoe_set_port_id(struct fc_lport *lport, 27367d65b0dfSJoe Eykholt u32 port_id, struct fc_frame *fp) 27377d65b0dfSJoe Eykholt { 27387d65b0dfSJoe Eykholt struct fcoe_port *port = lport_priv(lport); 27397d65b0dfSJoe Eykholt struct fcoe_interface *fcoe = port->fcoe; 27407d65b0dfSJoe Eykholt 27417d65b0dfSJoe Eykholt if (fp && fc_frame_payload_op(fp) == ELS_FLOGI) 27427d65b0dfSJoe Eykholt fcoe_ctlr_recv_flogi(&fcoe->ctlr, lport, fp); 27437d65b0dfSJoe Eykholt } 2744