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> 342ca32b48STejun Heo #include <linux/workqueue.h> 35a703e490SVasu Dev #include <scsi/scsi_tcq.h> 36a703e490SVasu Dev #include <scsi/scsicam.h> 37a703e490SVasu Dev #include <scsi/scsi_transport.h> 38a703e490SVasu Dev #include <scsi/scsi_transport_fc.h> 39a703e490SVasu Dev #include <net/rtnetlink.h> 40a703e490SVasu Dev 41a703e490SVasu Dev #include <scsi/fc/fc_encaps.h> 4297c8389dSJoe Eykholt #include <scsi/fc/fc_fip.h> 43a703e490SVasu Dev 44a703e490SVasu Dev #include <scsi/libfc.h> 45a703e490SVasu Dev #include <scsi/fc_frame.h> 46a703e490SVasu Dev #include <scsi/libfcoe.h> 47a703e490SVasu Dev 48fdd78027SVasu Dev #include "fcoe.h" 49fdd78027SVasu Dev 50a703e490SVasu Dev MODULE_AUTHOR("Open-FCoE.org"); 51a703e490SVasu Dev MODULE_DESCRIPTION("FCoE"); 529b34ecffSVasu Dev MODULE_LICENSE("GPL v2"); 53a703e490SVasu Dev 5405cc7390SYi Zou /* Performance tuning parameters for fcoe */ 5505cc7390SYi Zou static unsigned int fcoe_ddp_min; 5605cc7390SYi Zou module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); 5705cc7390SYi Zou MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ 5805cc7390SYi Zou "Direct Data Placement (DDP)."); 5905cc7390SYi Zou 60dfc1d0feSChris Leech DEFINE_MUTEX(fcoe_config_mutex); 61dfc1d0feSChris Leech 622ca32b48STejun Heo static struct workqueue_struct *fcoe_wq; 632ca32b48STejun Heo 64e7a51997SJoe Eykholt /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */ 65e7a51997SJoe Eykholt static DECLARE_COMPLETION(fcoe_flush_completion); 66e7a51997SJoe Eykholt 67a703e490SVasu Dev /* fcoe host list */ 68090eb6c4SChris Leech /* must only by accessed under the RTNL mutex */ 69a703e490SVasu Dev LIST_HEAD(fcoe_hostlist); 70a703e490SVasu Dev DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); 71a703e490SVasu Dev 72dd3fd72eSChris Leech /* Function Prototypes */ 731875f27eSRobert Love static int fcoe_reset(struct Scsi_Host *); 74fdd78027SVasu Dev static int fcoe_xmit(struct fc_lport *, struct fc_frame *); 75fdd78027SVasu Dev static int fcoe_rcv(struct sk_buff *, struct net_device *, 76fdd78027SVasu Dev struct packet_type *, struct net_device *); 771875f27eSRobert Love static int fcoe_percpu_receive_thread(void *); 781875f27eSRobert Love static void fcoe_percpu_clean(struct fc_lport *); 795e4f8fe7SRobert Love static int fcoe_link_speed_update(struct fc_lport *); 801875f27eSRobert Love static int fcoe_link_ok(struct fc_lport *); 81fdd78027SVasu Dev 82fdd78027SVasu Dev static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); 83fdd78027SVasu Dev static int fcoe_hostlist_add(const struct fc_lport *); 84fdd78027SVasu Dev 85a703e490SVasu Dev static int fcoe_device_notification(struct notifier_block *, ulong, void *); 86a703e490SVasu Dev static void fcoe_dev_setup(void); 87a703e490SVasu Dev static void fcoe_dev_cleanup(void); 881875f27eSRobert Love static struct fcoe_interface 891875f27eSRobert Love *fcoe_hostlist_lookup_port(const struct net_device *); 90a703e490SVasu Dev 911875f27eSRobert Love static int fcoe_fip_recv(struct sk_buff *, struct net_device *, 921875f27eSRobert Love struct packet_type *, struct net_device *); 931875f27eSRobert Love 941875f27eSRobert Love static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); 951875f27eSRobert Love static void fcoe_update_src_mac(struct fc_lport *, u8 *); 961875f27eSRobert Love static u8 *fcoe_get_src_mac(struct fc_lport *); 971875f27eSRobert Love static void fcoe_destroy_work(struct work_struct *); 981875f27eSRobert Love 991875f27eSRobert Love static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, 1001875f27eSRobert Love unsigned int); 1011875f27eSRobert Love static int fcoe_ddp_done(struct fc_lport *, u16); 10271f89491SYi Zou static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *, 10371f89491SYi Zou unsigned int); 1041875f27eSRobert Love static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *); 1051875f27eSRobert Love 10678a58246SYi Zou static bool fcoe_match(struct net_device *netdev); 10778a58246SYi Zou static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode); 10878a58246SYi Zou static int fcoe_destroy(struct net_device *netdev); 10978a58246SYi Zou static int fcoe_enable(struct net_device *netdev); 11078a58246SYi Zou static int fcoe_disable(struct net_device *netdev); 1111875f27eSRobert Love 1121875f27eSRobert Love static struct fc_seq *fcoe_elsct_send(struct fc_lport *, 1131875f27eSRobert Love u32 did, struct fc_frame *, 1141875f27eSRobert Love unsigned int op, 1151875f27eSRobert Love void (*resp)(struct fc_seq *, 1161875f27eSRobert Love struct fc_frame *, 1171875f27eSRobert Love void *), 1181875f27eSRobert Love void *, u32 timeout); 119859b7b64SChris Leech static void fcoe_recv_frame(struct sk_buff *skb); 1201875f27eSRobert Love 121b84056bfSYi Zou static void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *); 122b84056bfSYi Zou 1231875f27eSRobert Love /* notification function for packets from net device */ 124a703e490SVasu Dev static struct notifier_block fcoe_notifier = { 125a703e490SVasu Dev .notifier_call = fcoe_device_notification, 126a703e490SVasu Dev }; 127a703e490SVasu Dev 1281875f27eSRobert Love /* notification function for CPU hotplug events */ 1291875f27eSRobert Love static struct notifier_block fcoe_cpu_notifier = { 1301875f27eSRobert Love .notifier_call = fcoe_cpu_callback, 1311875f27eSRobert Love }; 1321875f27eSRobert Love 1338ca86f84SYi Zou static struct scsi_transport_template *fcoe_nport_scsi_transport; 1348ca86f84SYi Zou static struct scsi_transport_template *fcoe_vport_scsi_transport; 135a703e490SVasu Dev 1361875f27eSRobert Love static int fcoe_vport_destroy(struct fc_vport *); 1371875f27eSRobert Love static int fcoe_vport_create(struct fc_vport *, bool disabled); 1381875f27eSRobert Love static int fcoe_vport_disable(struct fc_vport *, bool disable); 1391875f27eSRobert Love static void fcoe_set_vport_symbolic_name(struct fc_vport *); 1407d65b0dfSJoe Eykholt static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *); 141bdf25218SNeerav Parikh static int fcoe_validate_vport_create(struct fc_vport *); 1421875f27eSRobert Love 1431875f27eSRobert Love static struct libfc_function_template fcoe_libfc_fcn_templ = { 1441875f27eSRobert Love .frame_send = fcoe_xmit, 1451875f27eSRobert Love .ddp_setup = fcoe_ddp_setup, 1461875f27eSRobert Love .ddp_done = fcoe_ddp_done, 14771f89491SYi Zou .ddp_target = fcoe_ddp_target, 1481875f27eSRobert Love .elsct_send = fcoe_elsct_send, 149b84056bfSYi Zou .get_lesb = fcoe_get_lesb, 1507d65b0dfSJoe Eykholt .lport_set_port_id = fcoe_set_port_id, 1511875f27eSRobert Love }; 1529a05753bSChris Leech 1538ca86f84SYi Zou struct fc_function_template fcoe_nport_fc_functions = { 154a703e490SVasu Dev .show_host_node_name = 1, 155a703e490SVasu Dev .show_host_port_name = 1, 156a703e490SVasu Dev .show_host_supported_classes = 1, 157a703e490SVasu Dev .show_host_supported_fc4s = 1, 158a703e490SVasu Dev .show_host_active_fc4s = 1, 159a703e490SVasu Dev .show_host_maxframe_size = 1, 160a703e490SVasu Dev 161a703e490SVasu Dev .show_host_port_id = 1, 162a703e490SVasu Dev .show_host_supported_speeds = 1, 163a703e490SVasu Dev .get_host_speed = fc_get_host_speed, 164a703e490SVasu Dev .show_host_speed = 1, 165a703e490SVasu Dev .show_host_port_type = 1, 166a703e490SVasu Dev .get_host_port_state = fc_get_host_port_state, 167a703e490SVasu Dev .show_host_port_state = 1, 168a703e490SVasu Dev .show_host_symbolic_name = 1, 169a703e490SVasu Dev 170a703e490SVasu Dev .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 171a703e490SVasu Dev .show_rport_maxframe_size = 1, 172a703e490SVasu Dev .show_rport_supported_classes = 1, 173a703e490SVasu Dev 174a703e490SVasu Dev .show_host_fabric_name = 1, 175a703e490SVasu Dev .show_starget_node_name = 1, 176a703e490SVasu Dev .show_starget_port_name = 1, 177a703e490SVasu Dev .show_starget_port_id = 1, 178a703e490SVasu Dev .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, 179a703e490SVasu Dev .show_rport_dev_loss_tmo = 1, 180a703e490SVasu Dev .get_fc_host_stats = fc_get_host_stats, 181a703e490SVasu Dev .issue_fc_host_lip = fcoe_reset, 182a703e490SVasu Dev 183a703e490SVasu Dev .terminate_rport_io = fc_rport_terminate_io, 1849a05753bSChris Leech 1859a05753bSChris Leech .vport_create = fcoe_vport_create, 1869a05753bSChris Leech .vport_delete = fcoe_vport_destroy, 1879a05753bSChris Leech .vport_disable = fcoe_vport_disable, 188dc8596d3SChris Leech .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, 189a51ab396SSteve Ma 190a51ab396SSteve Ma .bsg_request = fc_lport_bsg_request, 191a703e490SVasu Dev }; 192a703e490SVasu Dev 1938ca86f84SYi Zou struct fc_function_template fcoe_vport_fc_functions = { 194e9084bb8SChris Leech .show_host_node_name = 1, 195e9084bb8SChris Leech .show_host_port_name = 1, 196e9084bb8SChris Leech .show_host_supported_classes = 1, 197e9084bb8SChris Leech .show_host_supported_fc4s = 1, 198e9084bb8SChris Leech .show_host_active_fc4s = 1, 199e9084bb8SChris Leech .show_host_maxframe_size = 1, 200e9084bb8SChris Leech 201e9084bb8SChris Leech .show_host_port_id = 1, 202e9084bb8SChris Leech .show_host_supported_speeds = 1, 203e9084bb8SChris Leech .get_host_speed = fc_get_host_speed, 204e9084bb8SChris Leech .show_host_speed = 1, 205e9084bb8SChris Leech .show_host_port_type = 1, 206e9084bb8SChris Leech .get_host_port_state = fc_get_host_port_state, 207e9084bb8SChris Leech .show_host_port_state = 1, 208e9084bb8SChris Leech .show_host_symbolic_name = 1, 209e9084bb8SChris Leech 210e9084bb8SChris Leech .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 211e9084bb8SChris Leech .show_rport_maxframe_size = 1, 212e9084bb8SChris Leech .show_rport_supported_classes = 1, 213e9084bb8SChris Leech 214e9084bb8SChris Leech .show_host_fabric_name = 1, 215e9084bb8SChris Leech .show_starget_node_name = 1, 216e9084bb8SChris Leech .show_starget_port_name = 1, 217e9084bb8SChris Leech .show_starget_port_id = 1, 218e9084bb8SChris Leech .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, 219e9084bb8SChris Leech .show_rport_dev_loss_tmo = 1, 220e9084bb8SChris Leech .get_fc_host_stats = fc_get_host_stats, 221e9084bb8SChris Leech .issue_fc_host_lip = fcoe_reset, 222e9084bb8SChris Leech 223e9084bb8SChris Leech .terminate_rport_io = fc_rport_terminate_io, 224a51ab396SSteve Ma 225a51ab396SSteve Ma .bsg_request = fc_lport_bsg_request, 226e9084bb8SChris Leech }; 227e9084bb8SChris Leech 228a703e490SVasu Dev static struct scsi_host_template fcoe_shost_template = { 229a703e490SVasu Dev .module = THIS_MODULE, 230a703e490SVasu Dev .name = "FCoE Driver", 231a703e490SVasu Dev .proc_name = FCOE_NAME, 232a703e490SVasu Dev .queuecommand = fc_queuecommand, 233a703e490SVasu Dev .eh_abort_handler = fc_eh_abort, 234a703e490SVasu Dev .eh_device_reset_handler = fc_eh_device_reset, 235a703e490SVasu Dev .eh_host_reset_handler = fc_eh_host_reset, 236a703e490SVasu Dev .slave_alloc = fc_slave_alloc, 237a703e490SVasu Dev .change_queue_depth = fc_change_queue_depth, 238a703e490SVasu Dev .change_queue_type = fc_change_queue_type, 239a703e490SVasu Dev .this_id = -1, 24014caf44cSVasu Dev .cmd_per_lun = 3, 241a703e490SVasu Dev .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, 242a703e490SVasu Dev .use_clustering = ENABLE_CLUSTERING, 243a703e490SVasu Dev .sg_tablesize = SG_ALL, 244a703e490SVasu Dev .max_sectors = 0xffff, 245a703e490SVasu Dev }; 246a703e490SVasu Dev 24754b649f8SChris Leech /** 2481875f27eSRobert Love * fcoe_interface_setup() - Setup a FCoE interface 2491875f27eSRobert Love * @fcoe: The new FCoE interface 2501875f27eSRobert Love * @netdev: The net device that the fcoe interface is on 25154b649f8SChris Leech * 25254b649f8SChris Leech * Returns : 0 for success 2532e70e241SChris Leech * Locking: must be called with the RTNL mutex held 25454b649f8SChris Leech */ 25554b649f8SChris Leech static int fcoe_interface_setup(struct fcoe_interface *fcoe, 25654b649f8SChris Leech struct net_device *netdev) 25754b649f8SChris Leech { 25854b649f8SChris Leech struct fcoe_ctlr *fip = &fcoe->ctlr; 25954b649f8SChris Leech struct netdev_hw_addr *ha; 2605bab87e6SYi Zou struct net_device *real_dev; 26154b649f8SChris Leech u8 flogi_maddr[ETH_ALEN]; 262b7a727f1SYi Zou const struct net_device_ops *ops; 26354b649f8SChris Leech 26454b649f8SChris Leech fcoe->netdev = netdev; 26554b649f8SChris Leech 266b7a727f1SYi Zou /* Let LLD initialize for FCoE */ 267b7a727f1SYi Zou ops = netdev->netdev_ops; 268b7a727f1SYi Zou if (ops->ndo_fcoe_enable) { 269b7a727f1SYi Zou if (ops->ndo_fcoe_enable(netdev)) 270b7a727f1SYi Zou FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" 271b7a727f1SYi Zou " specific feature for LLD.\n"); 272b7a727f1SYi Zou } 273b7a727f1SYi Zou 27454b649f8SChris Leech /* Do not support for bonding device */ 275cc8bdf06SJiri Pirko if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) { 27659d92516Sjohn fastabend FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); 27754b649f8SChris Leech return -EOPNOTSUPP; 27854b649f8SChris Leech } 27954b649f8SChris Leech 28054b649f8SChris Leech /* look for SAN MAC address, if multiple SAN MACs exist, only 28154b649f8SChris Leech * use the first one for SPMA */ 2825bab87e6SYi Zou real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ? 2835bab87e6SYi Zou vlan_dev_real_dev(netdev) : netdev; 28454b649f8SChris Leech rcu_read_lock(); 2855bab87e6SYi Zou for_each_dev_addr(real_dev, ha) { 28654b649f8SChris Leech if ((ha->type == NETDEV_HW_ADDR_T_SAN) && 287bf361707SYi Zou (is_valid_ether_addr(ha->addr))) { 28854b649f8SChris Leech memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); 28954b649f8SChris Leech fip->spma = 1; 29054b649f8SChris Leech break; 29154b649f8SChris Leech } 29254b649f8SChris Leech } 29354b649f8SChris Leech rcu_read_unlock(); 29454b649f8SChris Leech 29554b649f8SChris Leech /* setup Source Mac Address */ 29654b649f8SChris Leech if (!fip->spma) 29754b649f8SChris Leech memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); 29854b649f8SChris Leech 29954b649f8SChris Leech /* 30054b649f8SChris Leech * Add FCoE MAC address as second unicast MAC address 30154b649f8SChris Leech * or enter promiscuous mode if not capable of listening 30254b649f8SChris Leech * for multiple unicast MACs. 30354b649f8SChris Leech */ 30454b649f8SChris Leech memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); 305a748ee24SJiri Pirko dev_uc_add(netdev, flogi_maddr); 30654b649f8SChris Leech if (fip->spma) 307a748ee24SJiri Pirko dev_uc_add(netdev, fip->ctl_src_addr); 308e10f8c66SJoe Eykholt if (fip->mode == FIP_MODE_VN2VN) { 309e10f8c66SJoe Eykholt dev_mc_add(netdev, FIP_ALL_VN2VN_MACS); 310e10f8c66SJoe Eykholt dev_mc_add(netdev, FIP_ALL_P2P_MACS); 311e10f8c66SJoe Eykholt } else 31222bedad3SJiri Pirko dev_mc_add(netdev, FIP_ALL_ENODE_MACS); 31354b649f8SChris Leech 31454b649f8SChris Leech /* 31554b649f8SChris Leech * setup the receive function from ethernet driver 31654b649f8SChris Leech * on the ethertype for the given device 31754b649f8SChris Leech */ 31854b649f8SChris Leech fcoe->fcoe_packet_type.func = fcoe_rcv; 31954b649f8SChris Leech fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE); 32054b649f8SChris Leech fcoe->fcoe_packet_type.dev = netdev; 32154b649f8SChris Leech dev_add_pack(&fcoe->fcoe_packet_type); 32254b649f8SChris Leech 32354b649f8SChris Leech fcoe->fip_packet_type.func = fcoe_fip_recv; 32454b649f8SChris Leech fcoe->fip_packet_type.type = htons(ETH_P_FIP); 32554b649f8SChris Leech fcoe->fip_packet_type.dev = netdev; 32654b649f8SChris Leech dev_add_pack(&fcoe->fip_packet_type); 32754b649f8SChris Leech 32854b649f8SChris Leech return 0; 32954b649f8SChris Leech } 33054b649f8SChris Leech 331a703e490SVasu Dev /** 3321875f27eSRobert Love * fcoe_interface_create() - Create a FCoE interface on a net device 3331875f27eSRobert Love * @netdev: The net device to create the FCoE interface on 3341dd454d9SJoe Eykholt * @fip_mode: The mode to use for FIP 335030f4e00SChris Leech * 336030f4e00SChris Leech * Returns: pointer to a struct fcoe_interface or NULL on error 337030f4e00SChris Leech */ 3381dd454d9SJoe Eykholt static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev, 3391dd454d9SJoe Eykholt enum fip_state fip_mode) 340030f4e00SChris Leech { 341030f4e00SChris Leech struct fcoe_interface *fcoe; 34259d92516Sjohn fastabend int err; 343030f4e00SChris Leech 3447287fb91SRobert Love if (!try_module_get(THIS_MODULE)) { 3457287fb91SRobert Love FCOE_NETDEV_DBG(netdev, 3467287fb91SRobert Love "Could not get a reference to the module\n"); 3477287fb91SRobert Love fcoe = ERR_PTR(-EBUSY); 3487287fb91SRobert Love goto out; 3497287fb91SRobert Love } 3507287fb91SRobert Love 351030f4e00SChris Leech fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL); 352030f4e00SChris Leech if (!fcoe) { 353030f4e00SChris Leech FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n"); 3547287fb91SRobert Love fcoe = ERR_PTR(-ENOMEM); 3557287fb91SRobert Love goto out_nomod; 356030f4e00SChris Leech } 357030f4e00SChris Leech 3582e70e241SChris Leech dev_hold(netdev); 359030f4e00SChris Leech kref_init(&fcoe->kref); 36054b649f8SChris Leech 36154b649f8SChris Leech /* 36254b649f8SChris Leech * Initialize FIP. 36354b649f8SChris Leech */ 3641dd454d9SJoe Eykholt fcoe_ctlr_init(&fcoe->ctlr, fip_mode); 36554b649f8SChris Leech fcoe->ctlr.send = fcoe_fip_send; 36654b649f8SChris Leech fcoe->ctlr.update_mac = fcoe_update_src_mac; 36711b56188SChris Leech fcoe->ctlr.get_src_addr = fcoe_get_src_mac; 36854b649f8SChris Leech 36959d92516Sjohn fastabend err = fcoe_interface_setup(fcoe, netdev); 37059d92516Sjohn fastabend if (err) { 37159d92516Sjohn fastabend fcoe_ctlr_destroy(&fcoe->ctlr); 37259d92516Sjohn fastabend kfree(fcoe); 37359d92516Sjohn fastabend dev_put(netdev); 3747287fb91SRobert Love fcoe = ERR_PTR(err); 3757287fb91SRobert Love goto out_nomod; 37659d92516Sjohn fastabend } 377030f4e00SChris Leech 3787287fb91SRobert Love goto out; 3797287fb91SRobert Love 3807287fb91SRobert Love out_nomod: 3817287fb91SRobert Love module_put(THIS_MODULE); 3827287fb91SRobert Love out: 383030f4e00SChris Leech return fcoe; 384030f4e00SChris Leech } 385030f4e00SChris Leech 386030f4e00SChris Leech /** 387030f4e00SChris Leech * fcoe_interface_release() - fcoe_port kref release function 3881875f27eSRobert Love * @kref: Embedded reference count in an fcoe_interface struct 389030f4e00SChris Leech */ 390030f4e00SChris Leech static void fcoe_interface_release(struct kref *kref) 391030f4e00SChris Leech { 392030f4e00SChris Leech struct fcoe_interface *fcoe; 3932e70e241SChris Leech struct net_device *netdev; 394030f4e00SChris Leech 395030f4e00SChris Leech fcoe = container_of(kref, struct fcoe_interface, kref); 3962e70e241SChris Leech netdev = fcoe->netdev; 3972e70e241SChris Leech /* tear-down the FCoE controller */ 3982e70e241SChris Leech fcoe_ctlr_destroy(&fcoe->ctlr); 399030f4e00SChris Leech kfree(fcoe); 4002e70e241SChris Leech dev_put(netdev); 4017287fb91SRobert Love module_put(THIS_MODULE); 402030f4e00SChris Leech } 403030f4e00SChris Leech 404030f4e00SChris Leech /** 4051875f27eSRobert Love * fcoe_interface_get() - Get a reference to a FCoE interface 4061875f27eSRobert Love * @fcoe: The FCoE interface to be held 407030f4e00SChris Leech */ 408030f4e00SChris Leech static inline void fcoe_interface_get(struct fcoe_interface *fcoe) 409030f4e00SChris Leech { 410030f4e00SChris Leech kref_get(&fcoe->kref); 411030f4e00SChris Leech } 412030f4e00SChris Leech 413030f4e00SChris Leech /** 4141875f27eSRobert Love * fcoe_interface_put() - Put a reference to a FCoE interface 4151875f27eSRobert Love * @fcoe: The FCoE interface to be released 416030f4e00SChris Leech */ 417030f4e00SChris Leech static inline void fcoe_interface_put(struct fcoe_interface *fcoe) 418030f4e00SChris Leech { 419030f4e00SChris Leech kref_put(&fcoe->kref, fcoe_interface_release); 420030f4e00SChris Leech } 421030f4e00SChris Leech 422030f4e00SChris Leech /** 423f04ca1b6SVasu Dev * fcoe_interface_cleanup() - Clean up a FCoE interface 424f04ca1b6SVasu Dev * @fcoe: The FCoE interface to be cleaned up 425f04ca1b6SVasu Dev * 426f04ca1b6SVasu Dev * Caller must be holding the RTNL mutex 427f04ca1b6SVasu Dev */ 428f04ca1b6SVasu Dev void fcoe_interface_cleanup(struct fcoe_interface *fcoe) 429f04ca1b6SVasu Dev { 430f04ca1b6SVasu Dev struct net_device *netdev = fcoe->netdev; 431f04ca1b6SVasu Dev struct fcoe_ctlr *fip = &fcoe->ctlr; 432f04ca1b6SVasu Dev u8 flogi_maddr[ETH_ALEN]; 433f04ca1b6SVasu Dev const struct net_device_ops *ops; 434f04ca1b6SVasu Dev struct fcoe_port *port = lport_priv(fcoe->ctlr.lp); 435f04ca1b6SVasu Dev 436f04ca1b6SVasu Dev FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); 437f04ca1b6SVasu Dev 438f04ca1b6SVasu Dev /* Logout of the fabric */ 439f04ca1b6SVasu Dev fc_fabric_logoff(fcoe->ctlr.lp); 440f04ca1b6SVasu Dev 441f04ca1b6SVasu Dev /* Cleanup the fc_lport */ 442f04ca1b6SVasu Dev fc_lport_destroy(fcoe->ctlr.lp); 443f04ca1b6SVasu Dev 444f04ca1b6SVasu Dev /* Stop the transmit retry timer */ 445f04ca1b6SVasu Dev del_timer_sync(&port->timer); 446f04ca1b6SVasu Dev 447f04ca1b6SVasu Dev /* Free existing transmit skbs */ 448f04ca1b6SVasu Dev fcoe_clean_pending_queue(fcoe->ctlr.lp); 449f04ca1b6SVasu Dev 450f04ca1b6SVasu Dev /* 451f04ca1b6SVasu Dev * Don't listen for Ethernet packets anymore. 452f04ca1b6SVasu Dev * synchronize_net() ensures that the packet handlers are not running 453f04ca1b6SVasu Dev * on another CPU. dev_remove_pack() would do that, this calls the 454f04ca1b6SVasu Dev * unsyncronized version __dev_remove_pack() to avoid multiple delays. 455f04ca1b6SVasu Dev */ 456f04ca1b6SVasu Dev __dev_remove_pack(&fcoe->fcoe_packet_type); 457f04ca1b6SVasu Dev __dev_remove_pack(&fcoe->fip_packet_type); 458f04ca1b6SVasu Dev synchronize_net(); 459f04ca1b6SVasu Dev 460f04ca1b6SVasu Dev /* Delete secondary MAC addresses */ 461f04ca1b6SVasu Dev memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); 462f04ca1b6SVasu Dev dev_uc_del(netdev, flogi_maddr); 463f04ca1b6SVasu Dev if (fip->spma) 464f04ca1b6SVasu Dev dev_uc_del(netdev, fip->ctl_src_addr); 465f04ca1b6SVasu Dev if (fip->mode == FIP_MODE_VN2VN) { 466f04ca1b6SVasu Dev dev_mc_del(netdev, FIP_ALL_VN2VN_MACS); 467f04ca1b6SVasu Dev dev_mc_del(netdev, FIP_ALL_P2P_MACS); 468f04ca1b6SVasu Dev } else 469f04ca1b6SVasu Dev dev_mc_del(netdev, FIP_ALL_ENODE_MACS); 470f04ca1b6SVasu Dev 471f04ca1b6SVasu Dev if (!is_zero_ether_addr(port->data_src_addr)) 472f04ca1b6SVasu Dev dev_uc_del(netdev, port->data_src_addr); 473f04ca1b6SVasu Dev 474f04ca1b6SVasu Dev /* Tell the LLD we are done w/ FCoE */ 475f04ca1b6SVasu Dev ops = netdev->netdev_ops; 476f04ca1b6SVasu Dev if (ops->ndo_fcoe_disable) { 477f04ca1b6SVasu Dev if (ops->ndo_fcoe_disable(netdev)) 478f04ca1b6SVasu Dev FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" 479f04ca1b6SVasu Dev " specific feature for LLD.\n"); 480f04ca1b6SVasu Dev } 481f04ca1b6SVasu Dev fcoe_interface_put(fcoe); 482f04ca1b6SVasu Dev } 483f04ca1b6SVasu Dev 484f04ca1b6SVasu Dev /** 4851875f27eSRobert Love * fcoe_fip_recv() - Handler for received FIP frames 4861875f27eSRobert Love * @skb: The receive skb 4871875f27eSRobert Love * @netdev: The associated net device 4881875f27eSRobert Love * @ptype: The packet_type structure which was used to register this handler 4891875f27eSRobert Love * @orig_dev: The original net_device the the skb was received on. 4901875f27eSRobert Love * (in case dev is a bond) 491ab6b85c1SVasu Dev * 492ab6b85c1SVasu Dev * Returns: 0 for success 493ab6b85c1SVasu Dev */ 4941875f27eSRobert Love static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, 495ab6b85c1SVasu Dev struct packet_type *ptype, 496ab6b85c1SVasu Dev struct net_device *orig_dev) 497ab6b85c1SVasu Dev { 498259ad85dSChris Leech struct fcoe_interface *fcoe; 499ab6b85c1SVasu Dev 500259ad85dSChris Leech fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); 5013fe9a0baSChris Leech fcoe_ctlr_recv(&fcoe->ctlr, skb); 502ab6b85c1SVasu Dev return 0; 503ab6b85c1SVasu Dev } 504ab6b85c1SVasu Dev 505ab6b85c1SVasu Dev /** 5061875f27eSRobert Love * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame 5071875f27eSRobert Love * @fip: The FCoE controller 5081875f27eSRobert Love * @skb: The FIP packet to be sent 509ab6b85c1SVasu Dev */ 510ab6b85c1SVasu Dev static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) 511ab6b85c1SVasu Dev { 5123fe9a0baSChris Leech skb->dev = fcoe_from_ctlr(fip)->netdev; 513ab6b85c1SVasu Dev dev_queue_xmit(skb); 514ab6b85c1SVasu Dev } 515ab6b85c1SVasu Dev 516ab6b85c1SVasu Dev /** 5171875f27eSRobert Love * fcoe_update_src_mac() - Update the Ethernet MAC filters 5181875f27eSRobert Love * @lport: The local port to update the source MAC on 5191875f27eSRobert Love * @addr: Unicast MAC address to add 520ab6b85c1SVasu Dev * 521ab6b85c1SVasu Dev * Remove any previously-set unicast MAC filter. 522ab6b85c1SVasu Dev * Add secondary FCoE MAC address filter for our OUI. 523ab6b85c1SVasu Dev */ 52411b56188SChris Leech static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) 525ab6b85c1SVasu Dev { 52611b56188SChris Leech struct fcoe_port *port = lport_priv(lport); 5278597ae8bSBhanu Prakash Gollapudi struct fcoe_interface *fcoe = port->priv; 528ab6b85c1SVasu Dev 529ab6b85c1SVasu Dev rtnl_lock(); 53011b56188SChris Leech if (!is_zero_ether_addr(port->data_src_addr)) 531a748ee24SJiri Pirko dev_uc_del(fcoe->netdev, port->data_src_addr); 53211b56188SChris Leech if (!is_zero_ether_addr(addr)) 533a748ee24SJiri Pirko dev_uc_add(fcoe->netdev, addr); 53411b56188SChris Leech memcpy(port->data_src_addr, addr, ETH_ALEN); 535ab6b85c1SVasu Dev rtnl_unlock(); 536ab6b85c1SVasu Dev } 537ab6b85c1SVasu Dev 538ab6b85c1SVasu Dev /** 53911b56188SChris Leech * fcoe_get_src_mac() - return the Ethernet source address for an lport 54011b56188SChris Leech * @lport: libfc lport 54111b56188SChris Leech */ 54211b56188SChris Leech static u8 *fcoe_get_src_mac(struct fc_lport *lport) 54311b56188SChris Leech { 54411b56188SChris Leech struct fcoe_port *port = lport_priv(lport); 54511b56188SChris Leech 54611b56188SChris Leech return port->data_src_addr; 54711b56188SChris Leech } 54811b56188SChris Leech 54911b56188SChris Leech /** 5501875f27eSRobert Love * fcoe_lport_config() - Set up a local port 5511875f27eSRobert Love * @lport: The local port to be setup 552a703e490SVasu Dev * 553a703e490SVasu Dev * Returns: 0 for success 554a703e490SVasu Dev */ 5551875f27eSRobert Love static int fcoe_lport_config(struct fc_lport *lport) 556a703e490SVasu Dev { 5571875f27eSRobert Love lport->link_up = 0; 5581875f27eSRobert Love lport->qfull = 0; 5591875f27eSRobert Love lport->max_retry_count = 3; 5601875f27eSRobert Love lport->max_rport_retry_count = 3; 5611875f27eSRobert Love lport->e_d_tov = 2 * 1000; /* FC-FS default */ 5621875f27eSRobert Love lport->r_a_tov = 2 * 2 * 1000; 5631875f27eSRobert Love lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | 564a703e490SVasu Dev FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); 5651875f27eSRobert Love lport->does_npiv = 1; 566a703e490SVasu Dev 5671875f27eSRobert Love fc_lport_init_stats(lport); 568a703e490SVasu Dev 569a703e490SVasu Dev /* lport fc_lport related configuration */ 5701875f27eSRobert Love fc_lport_config(lport); 571a703e490SVasu Dev 572a703e490SVasu Dev /* offload related configuration */ 5731875f27eSRobert Love lport->crc_offload = 0; 5741875f27eSRobert Love lport->seq_offload = 0; 5751875f27eSRobert Love lport->lro_enabled = 0; 5761875f27eSRobert Love lport->lro_xid = 0; 5771875f27eSRobert Love lport->lso_max = 0; 578a703e490SVasu Dev 579a703e490SVasu Dev return 0; 580a703e490SVasu Dev } 581a703e490SVasu Dev 582a703e490SVasu Dev /** 583dcece412SYi Zou * fcoe_get_wwn() - Get the world wide name from LLD if it supports it 584dcece412SYi Zou * @netdev: the associated net device 585dcece412SYi Zou * @wwn: the output WWN 586dcece412SYi Zou * @type: the type of WWN (WWPN or WWNN) 587dcece412SYi Zou * 588dcece412SYi Zou * Returns: 0 for success 589dcece412SYi Zou */ 590dcece412SYi Zou static int fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type) 591dcece412SYi Zou { 592dcece412SYi Zou const struct net_device_ops *ops = netdev->netdev_ops; 593dcece412SYi Zou 594dcece412SYi Zou if (ops->ndo_fcoe_get_wwn) 595dcece412SYi Zou return ops->ndo_fcoe_get_wwn(netdev, wwn, type); 596dcece412SYi Zou return -EINVAL; 597dcece412SYi Zou } 598dcece412SYi Zou 599dcece412SYi Zou /** 60054a5b21dSYi Zou * fcoe_netdev_features_change - Updates the lport's offload flags based 60154a5b21dSYi Zou * on the LLD netdev's FCoE feature flags 60254a5b21dSYi Zou */ 60354a5b21dSYi Zou static void fcoe_netdev_features_change(struct fc_lport *lport, 60454a5b21dSYi Zou struct net_device *netdev) 60554a5b21dSYi Zou { 60654a5b21dSYi Zou mutex_lock(&lport->lp_mutex); 60754a5b21dSYi Zou 60854a5b21dSYi Zou if (netdev->features & NETIF_F_SG) 60954a5b21dSYi Zou lport->sg_supp = 1; 61054a5b21dSYi Zou else 61154a5b21dSYi Zou lport->sg_supp = 0; 61254a5b21dSYi Zou 61354a5b21dSYi Zou if (netdev->features & NETIF_F_FCOE_CRC) { 61454a5b21dSYi Zou lport->crc_offload = 1; 61554a5b21dSYi Zou FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); 61654a5b21dSYi Zou } else { 61754a5b21dSYi Zou lport->crc_offload = 0; 61854a5b21dSYi Zou } 61954a5b21dSYi Zou 62054a5b21dSYi Zou if (netdev->features & NETIF_F_FSO) { 62154a5b21dSYi Zou lport->seq_offload = 1; 62254a5b21dSYi Zou lport->lso_max = netdev->gso_max_size; 62354a5b21dSYi Zou FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", 62454a5b21dSYi Zou lport->lso_max); 62554a5b21dSYi Zou } else { 62654a5b21dSYi Zou lport->seq_offload = 0; 62754a5b21dSYi Zou lport->lso_max = 0; 62854a5b21dSYi Zou } 62954a5b21dSYi Zou 63054a5b21dSYi Zou if (netdev->fcoe_ddp_xid) { 63154a5b21dSYi Zou lport->lro_enabled = 1; 63254a5b21dSYi Zou lport->lro_xid = netdev->fcoe_ddp_xid; 63354a5b21dSYi Zou FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", 63454a5b21dSYi Zou lport->lro_xid); 63554a5b21dSYi Zou } else { 63654a5b21dSYi Zou lport->lro_enabled = 0; 63754a5b21dSYi Zou lport->lro_xid = 0; 63854a5b21dSYi Zou } 63954a5b21dSYi Zou 64054a5b21dSYi Zou mutex_unlock(&lport->lp_mutex); 64154a5b21dSYi Zou } 64254a5b21dSYi Zou 64354a5b21dSYi Zou /** 6441875f27eSRobert Love * fcoe_netdev_config() - Set up net devive for SW FCoE 6451875f27eSRobert Love * @lport: The local port that is associated with the net device 6461875f27eSRobert Love * @netdev: The associated net device 647a703e490SVasu Dev * 6481875f27eSRobert Love * Must be called after fcoe_lport_config() as it will use local port mutex 649a703e490SVasu Dev * 650a703e490SVasu Dev * Returns: 0 for success 651a703e490SVasu Dev */ 6521875f27eSRobert Love static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) 653a703e490SVasu Dev { 654a703e490SVasu Dev u32 mfs; 655a703e490SVasu Dev u64 wwnn, wwpn; 65625024989SChris Leech struct fcoe_interface *fcoe; 657014f5c3fSChris Leech struct fcoe_port *port; 658a703e490SVasu Dev 659a703e490SVasu Dev /* Setup lport private data to point to fcoe softc */ 6601875f27eSRobert Love port = lport_priv(lport); 6618597ae8bSBhanu Prakash Gollapudi fcoe = port->priv; 662a703e490SVasu Dev 663a703e490SVasu Dev /* 664a703e490SVasu Dev * Determine max frame size based on underlying device and optional 665a703e490SVasu Dev * user-configured limit. If the MFS is too low, fcoe_link_ok() 666a703e490SVasu Dev * will return 0, so do this first. 667a703e490SVasu Dev */ 6687221d7e5SYi Zou mfs = netdev->mtu; 6697221d7e5SYi Zou if (netdev->features & NETIF_F_FCOE_MTU) { 6707221d7e5SYi Zou mfs = FCOE_MTU; 6717221d7e5SYi Zou FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); 6727221d7e5SYi Zou } 6737221d7e5SYi Zou mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); 6741875f27eSRobert Love if (fc_set_mfs(lport, mfs)) 675a703e490SVasu Dev return -EINVAL; 676a703e490SVasu Dev 677a703e490SVasu Dev /* offload features support */ 67854a5b21dSYi Zou fcoe_netdev_features_change(lport, netdev); 679a703e490SVasu Dev 680014f5c3fSChris Leech skb_queue_head_init(&port->fcoe_pending_queue); 681014f5c3fSChris Leech port->fcoe_pending_queue_active = 0; 6821875f27eSRobert Love setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport); 683a703e490SVasu Dev 6845e4f8fe7SRobert Love fcoe_link_speed_update(lport); 6855e4f8fe7SRobert Love 6861875f27eSRobert Love if (!lport->vport) { 687dcece412SYi Zou if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN)) 68875ea89efSYi Zou wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0); 6891875f27eSRobert Love fc_set_wwnn(lport, wwnn); 690dcece412SYi Zou if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN)) 691dcece412SYi Zou wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 692cf4aebcaSVasu Dev 2, 0); 6931875f27eSRobert Love fc_set_wwpn(lport, wwpn); 6949a05753bSChris Leech } 695a703e490SVasu Dev 696a703e490SVasu Dev return 0; 697a703e490SVasu Dev } 698a703e490SVasu Dev 699a703e490SVasu Dev /** 7001875f27eSRobert Love * fcoe_shost_config() - Set up the SCSI host associated with a local port 7011875f27eSRobert Love * @lport: The local port 7021875f27eSRobert Love * @dev: The device associated with the SCSI host 703a703e490SVasu Dev * 704a703e490SVasu Dev * Must be called after fcoe_lport_config() and fcoe_netdev_config() 705a703e490SVasu Dev * 706a703e490SVasu Dev * Returns: 0 for success 707a703e490SVasu Dev */ 7088ba00a4bSVasu Dev static int fcoe_shost_config(struct fc_lport *lport, struct device *dev) 709a703e490SVasu Dev { 710a703e490SVasu Dev int rc = 0; 711a703e490SVasu Dev 712a703e490SVasu Dev /* lport scsi host config */ 7131875f27eSRobert Love lport->host->max_lun = FCOE_MAX_LUN; 7141875f27eSRobert Love lport->host->max_id = FCOE_MAX_FCP_TARGET; 7151875f27eSRobert Love lport->host->max_channel = 0; 716da87bfabSVasu Dev lport->host->max_cmd_len = FCOE_MAX_CMD_LEN; 717da87bfabSVasu Dev 7181875f27eSRobert Love if (lport->vport) 7198ca86f84SYi Zou lport->host->transportt = fcoe_vport_scsi_transport; 720e9084bb8SChris Leech else 7218ca86f84SYi Zou lport->host->transportt = fcoe_nport_scsi_transport; 722a703e490SVasu Dev 723a703e490SVasu Dev /* add the new host to the SCSI-ml */ 7241875f27eSRobert Love rc = scsi_add_host(lport->host, dev); 725a703e490SVasu Dev if (rc) { 7261875f27eSRobert Love FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " 727d5488eb9SRobert Love "error on scsi_add_host\n"); 728a703e490SVasu Dev return rc; 729a703e490SVasu Dev } 7309a05753bSChris Leech 7311875f27eSRobert Love if (!lport->vport) 7324be929beSAlexey Dobriyan fc_host_max_npiv_vports(lport->host) = USHRT_MAX; 7339a05753bSChris Leech 7341875f27eSRobert Love snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, 7355baa17c3SChris Leech "%s v%s over %s", FCOE_NAME, FCOE_VERSION, 7361875f27eSRobert Love fcoe_netdev(lport)->name); 737a703e490SVasu Dev 738a703e490SVasu Dev return 0; 739a703e490SVasu Dev } 740a703e490SVasu Dev 7411875f27eSRobert Love /** 7421875f27eSRobert Love * fcoe_oem_match() - The match routine for the offloaded exchange manager 7431875f27eSRobert Love * @fp: The I/O frame 744d7179680SVasu Dev * 7451875f27eSRobert Love * This routine will be associated with an exchange manager (EM). When 7461875f27eSRobert Love * the libfc exchange handling code is looking for an EM to use it will 7471875f27eSRobert Love * call this routine and pass it the frame that it wishes to send. This 7481875f27eSRobert Love * routine will return True if the associated EM is to be used and False 7491875f27eSRobert Love * if the echange code should continue looking for an EM. 7501875f27eSRobert Love * 7511875f27eSRobert Love * The offload EM that this routine is associated with will handle any 7521875f27eSRobert Love * packets that are for SCSI read requests. 7531875f27eSRobert Love * 7541875f27eSRobert Love * Returns: True for read types I/O, otherwise returns false. 755d7179680SVasu Dev */ 756d7179680SVasu Dev bool fcoe_oem_match(struct fc_frame *fp) 757d7179680SVasu Dev { 75805cc7390SYi Zou return fc_fcp_is_read(fr_fsp(fp)) && 75905cc7390SYi Zou (fr_fsp(fp)->data_len > fcoe_ddp_min); 760d7179680SVasu Dev } 761d7179680SVasu Dev 762a703e490SVasu Dev /** 7631875f27eSRobert Love * fcoe_em_config() - Allocate and configure an exchange manager 7641875f27eSRobert Love * @lport: The local port that the new EM will be associated with 765a703e490SVasu Dev * 766a703e490SVasu Dev * Returns: 0 on success 767a703e490SVasu Dev */ 7681875f27eSRobert Love static inline int fcoe_em_config(struct fc_lport *lport) 769a703e490SVasu Dev { 7701875f27eSRobert Love struct fcoe_port *port = lport_priv(lport); 7718597ae8bSBhanu Prakash Gollapudi struct fcoe_interface *fcoe = port->priv; 77225024989SChris Leech struct fcoe_interface *oldfcoe = NULL; 7731d1b88dcSVasu Dev struct net_device *old_real_dev, *cur_real_dev; 774d7179680SVasu Dev u16 min_xid = FCOE_MIN_XID; 775d7179680SVasu Dev u16 max_xid = FCOE_MAX_XID; 776d7179680SVasu Dev 777d7179680SVasu Dev /* 778d7179680SVasu Dev * Check if need to allocate an em instance for 779d7179680SVasu Dev * offload exchange ids to be shared across all VN_PORTs/lport. 780d7179680SVasu Dev */ 7811875f27eSRobert Love if (!lport->lro_enabled || !lport->lro_xid || 7821875f27eSRobert Love (lport->lro_xid >= max_xid)) { 7831875f27eSRobert Love lport->lro_xid = 0; 784d7179680SVasu Dev goto skip_oem; 785d7179680SVasu Dev } 786d7179680SVasu Dev 787d7179680SVasu Dev /* 788d7179680SVasu Dev * Reuse existing offload em instance in case 7891d1b88dcSVasu Dev * it is already allocated on real eth device 790d7179680SVasu Dev */ 79125024989SChris Leech if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) 79225024989SChris Leech cur_real_dev = vlan_dev_real_dev(fcoe->netdev); 7931d1b88dcSVasu Dev else 79425024989SChris Leech cur_real_dev = fcoe->netdev; 7951d1b88dcSVasu Dev 79625024989SChris Leech list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { 79725024989SChris Leech if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) 79825024989SChris Leech old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); 7991d1b88dcSVasu Dev else 80025024989SChris Leech old_real_dev = oldfcoe->netdev; 8011d1b88dcSVasu Dev 8021d1b88dcSVasu Dev if (cur_real_dev == old_real_dev) { 803991cbb60SChris Leech fcoe->oem = oldfcoe->oem; 804d7179680SVasu Dev break; 805d7179680SVasu Dev } 806d7179680SVasu Dev } 807d7179680SVasu Dev 808991cbb60SChris Leech if (fcoe->oem) { 8091875f27eSRobert Love if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { 810d7179680SVasu Dev printk(KERN_ERR "fcoe_em_config: failed to add " 811d7179680SVasu Dev "offload em:%p on interface:%s\n", 812991cbb60SChris Leech fcoe->oem, fcoe->netdev->name); 813a703e490SVasu Dev return -ENOMEM; 814d7179680SVasu Dev } 815d7179680SVasu Dev } else { 8161875f27eSRobert Love fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, 8171875f27eSRobert Love FCOE_MIN_XID, lport->lro_xid, 818d7179680SVasu Dev fcoe_oem_match); 819991cbb60SChris Leech if (!fcoe->oem) { 820d7179680SVasu Dev printk(KERN_ERR "fcoe_em_config: failed to allocate " 821d7179680SVasu Dev "em for offload exches on interface:%s\n", 82225024989SChris Leech fcoe->netdev->name); 823d7179680SVasu Dev return -ENOMEM; 824d7179680SVasu Dev } 825d7179680SVasu Dev } 826d7179680SVasu Dev 827d7179680SVasu Dev /* 828d7179680SVasu Dev * Exclude offload EM xid range from next EM xid range. 829d7179680SVasu Dev */ 8301875f27eSRobert Love min_xid += lport->lro_xid + 1; 831d7179680SVasu Dev 832d7179680SVasu Dev skip_oem: 8331875f27eSRobert Love if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { 834d7179680SVasu Dev printk(KERN_ERR "fcoe_em_config: failed to " 83525024989SChris Leech "allocate em on interface %s\n", fcoe->netdev->name); 836d7179680SVasu Dev return -ENOMEM; 837d7179680SVasu Dev } 838a703e490SVasu Dev 839a703e490SVasu Dev return 0; 840a703e490SVasu Dev } 841a703e490SVasu Dev 842a703e490SVasu Dev /** 8431875f27eSRobert Love * fcoe_if_destroy() - Tear down a SW FCoE instance 8441875f27eSRobert Love * @lport: The local port to be destroyed 84534ce27bcSVasu Dev * 846a703e490SVasu Dev */ 847af7f85d9SChris Leech static void fcoe_if_destroy(struct fc_lport *lport) 848a703e490SVasu Dev { 84954b649f8SChris Leech /* Free queued packets for the per-CPU receive threads */ 85054b649f8SChris Leech fcoe_percpu_clean(lport); 85154b649f8SChris Leech 852a703e490SVasu Dev /* Detach from the scsi-ml */ 853af7f85d9SChris Leech fc_remove_host(lport->host); 854af7f85d9SChris Leech scsi_remove_host(lport->host); 855a703e490SVasu Dev 85680e736f8SYi Zou /* Destroy lport scsi_priv */ 85780e736f8SYi Zou fc_fcp_destroy(lport); 85880e736f8SYi Zou 859a703e490SVasu Dev /* There are no more rports or I/O, free the EM */ 860af7f85d9SChris Leech fc_exch_mgr_free(lport); 861a703e490SVasu Dev 862a703e490SVasu Dev /* Free memory used by statistical counters */ 863af7f85d9SChris Leech fc_lport_free_stats(lport); 864a703e490SVasu Dev 8652e70e241SChris Leech /* Release the Scsi_Host */ 866af7f85d9SChris Leech scsi_host_put(lport->host); 867a703e490SVasu Dev } 868a703e490SVasu Dev 8691875f27eSRobert Love /** 8701875f27eSRobert Love * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device 8711875f27eSRobert Love * @lport: The local port to setup DDP for 8721875f27eSRobert Love * @xid: The exchange ID for this DDP transfer 8731875f27eSRobert Love * @sgl: The scatterlist describing this transfer 8741875f27eSRobert Love * @sgc: The number of sg items 875a703e490SVasu Dev * 8761875f27eSRobert Love * Returns: 0 if the DDP context was not configured 877a703e490SVasu Dev */ 8781875f27eSRobert Love static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, 879a703e490SVasu Dev struct scatterlist *sgl, unsigned int sgc) 880a703e490SVasu Dev { 8811875f27eSRobert Love struct net_device *netdev = fcoe_netdev(lport); 882a703e490SVasu Dev 8831875f27eSRobert Love if (netdev->netdev_ops->ndo_fcoe_ddp_setup) 8841875f27eSRobert Love return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, 8851875f27eSRobert Love xid, sgl, 8861875f27eSRobert Love sgc); 887a703e490SVasu Dev 888a703e490SVasu Dev return 0; 889a703e490SVasu Dev } 890a703e490SVasu Dev 891a703e490SVasu Dev /** 89271f89491SYi Zou * fcoe_ddp_target() - Call a LLD's ddp_target through the net device 89371f89491SYi Zou * @lport: The local port to setup DDP for 89471f89491SYi Zou * @xid: The exchange ID for this DDP transfer 89571f89491SYi Zou * @sgl: The scatterlist describing this transfer 89671f89491SYi Zou * @sgc: The number of sg items 89771f89491SYi Zou * 89871f89491SYi Zou * Returns: 0 if the DDP context was not configured 89971f89491SYi Zou */ 90071f89491SYi Zou static int fcoe_ddp_target(struct fc_lport *lport, u16 xid, 90171f89491SYi Zou struct scatterlist *sgl, unsigned int sgc) 90271f89491SYi Zou { 90371f89491SYi Zou struct net_device *netdev = fcoe_netdev(lport); 90471f89491SYi Zou 90571f89491SYi Zou if (netdev->netdev_ops->ndo_fcoe_ddp_target) 90671f89491SYi Zou return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid, 90771f89491SYi Zou sgl, sgc); 90871f89491SYi Zou 90971f89491SYi Zou return 0; 91071f89491SYi Zou } 91171f89491SYi Zou 91271f89491SYi Zou 91371f89491SYi Zou /** 9141875f27eSRobert Love * fcoe_ddp_done() - Call a LLD's ddp_done through the net device 9151875f27eSRobert Love * @lport: The local port to complete DDP on 9161875f27eSRobert Love * @xid: The exchange ID for this DDP transfer 917a703e490SVasu Dev * 9181875f27eSRobert Love * Returns: the length of data that have been completed by DDP 9191875f27eSRobert Love */ 9201875f27eSRobert Love static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) 9211875f27eSRobert Love { 9221875f27eSRobert Love struct net_device *netdev = fcoe_netdev(lport); 9231875f27eSRobert Love 9241875f27eSRobert Love if (netdev->netdev_ops->ndo_fcoe_ddp_done) 9251875f27eSRobert Love return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); 9261875f27eSRobert Love return 0; 9271875f27eSRobert Love } 9281875f27eSRobert Love 9291875f27eSRobert Love /** 9301875f27eSRobert Love * fcoe_if_create() - Create a FCoE instance on an interface 9311875f27eSRobert Love * @fcoe: The FCoE interface to create a local port on 9321875f27eSRobert Love * @parent: The device pointer to be the parent in sysfs for the SCSI host 9331875f27eSRobert Love * @npiv: Indicates if the port is a vport or not 9341875f27eSRobert Love * 9351875f27eSRobert Love * Creates a fc_lport instance and a Scsi_Host instance and configure them. 936a703e490SVasu Dev * 937af7f85d9SChris Leech * Returns: The allocated fc_lport or an error pointer 938a703e490SVasu Dev */ 939030f4e00SChris Leech static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, 9409a05753bSChris Leech struct device *parent, int npiv) 941a703e490SVasu Dev { 9421875f27eSRobert Love struct net_device *netdev = fcoe->netdev; 94372fa396bSVasu Dev struct fc_lport *lport, *n_port; 944014f5c3fSChris Leech struct fcoe_port *port; 94572fa396bSVasu Dev struct Scsi_Host *shost; 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 95572fa396bSVasu Dev if (!npiv) 95672fa396bSVasu Dev lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port)); 95772fa396bSVasu Dev else 95872fa396bSVasu Dev lport = libfc_vport_create(vport, sizeof(*port)); 95972fa396bSVasu Dev 96086221969SChris Leech if (!lport) { 961014f5c3fSChris Leech FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); 962014f5c3fSChris Leech rc = -ENOMEM; 963030f4e00SChris Leech goto out; 964014f5c3fSChris Leech } 965014f5c3fSChris Leech port = lport_priv(lport); 9662e70e241SChris Leech port->lport = lport; 9678597ae8bSBhanu Prakash Gollapudi port->priv = fcoe; 9688597ae8bSBhanu Prakash Gollapudi port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH; 9698597ae8bSBhanu Prakash Gollapudi port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH; 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 1012e8af4d43SVasu Dev /* 1013e8af4d43SVasu Dev * fcoe_em_alloc() and fcoe_hostlist_add() both 10149a05753bSChris Leech * need to be atomic with respect to other changes to the 10159a05753bSChris Leech * hostlist since fcoe_em_alloc() looks for an existing EM 1016e8af4d43SVasu Dev * instance on host list updated by fcoe_hostlist_add(). 1017c863df33SChris Leech * 10189a05753bSChris Leech * This is currently handled through the fcoe_config_mutex 10199a05753bSChris Leech * begin held. 1020e8af4d43SVasu Dev */ 102172fa396bSVasu Dev if (!npiv) 102296316099SVasu Dev /* lport exch manager allocation */ 1023af7f85d9SChris Leech rc = fcoe_em_config(lport); 102472fa396bSVasu Dev else { 102572fa396bSVasu Dev shost = vport_to_shost(vport); 102672fa396bSVasu Dev n_port = shost_priv(shost); 102772fa396bSVasu Dev rc = fc_exch_mgr_list_clone(n_port, lport); 102896316099SVasu Dev } 102972fa396bSVasu Dev 103072fa396bSVasu Dev if (rc) { 103172fa396bSVasu Dev FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n"); 103272fa396bSVasu Dev goto out_lp_destroy; 10339a05753bSChris Leech } 103496316099SVasu Dev 1035030f4e00SChris Leech fcoe_interface_get(fcoe); 1036af7f85d9SChris Leech return lport; 1037a703e490SVasu Dev 1038a703e490SVasu Dev out_lp_destroy: 1039af7f85d9SChris Leech fc_exch_mgr_free(lport); 1040a703e490SVasu Dev out_host_put: 1041af7f85d9SChris Leech scsi_host_put(lport->host); 1042af7f85d9SChris Leech out: 1043af7f85d9SChris Leech return ERR_PTR(rc); 1044a703e490SVasu Dev } 1045a703e490SVasu Dev 1046a703e490SVasu Dev /** 10471875f27eSRobert Love * fcoe_if_init() - Initialization routine for fcoe.ko 10481875f27eSRobert Love * 10491875f27eSRobert Love * Attaches the SW FCoE transport to the FC transport 1050a703e490SVasu Dev * 1051a703e490SVasu Dev * Returns: 0 on success 1052a703e490SVasu Dev */ 1053a703e490SVasu Dev static int __init fcoe_if_init(void) 1054a703e490SVasu Dev { 1055a703e490SVasu Dev /* attach to scsi transport */ 10568ca86f84SYi Zou fcoe_nport_scsi_transport = 10578ca86f84SYi Zou fc_attach_transport(&fcoe_nport_fc_functions); 10588ca86f84SYi Zou fcoe_vport_scsi_transport = 10598ca86f84SYi Zou fc_attach_transport(&fcoe_vport_fc_functions); 1060a703e490SVasu Dev 10618ca86f84SYi Zou if (!fcoe_nport_scsi_transport) { 1062d5488eb9SRobert Love printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); 1063a703e490SVasu Dev return -ENODEV; 1064a703e490SVasu Dev } 1065a703e490SVasu Dev 1066a703e490SVasu Dev return 0; 1067a703e490SVasu Dev } 1068a703e490SVasu Dev 1069a703e490SVasu Dev /** 10701875f27eSRobert Love * fcoe_if_exit() - Tear down fcoe.ko 10711875f27eSRobert Love * 10721875f27eSRobert Love * Detaches the SW FCoE transport from the FC transport 1073a703e490SVasu Dev * 1074a703e490SVasu Dev * Returns: 0 on success 1075a703e490SVasu Dev */ 1076a703e490SVasu Dev int __exit fcoe_if_exit(void) 1077a703e490SVasu Dev { 10788ca86f84SYi Zou fc_release_transport(fcoe_nport_scsi_transport); 10798ca86f84SYi Zou fc_release_transport(fcoe_vport_scsi_transport); 10808ca86f84SYi Zou fcoe_nport_scsi_transport = NULL; 10818ca86f84SYi Zou fcoe_vport_scsi_transport = NULL; 1082a703e490SVasu Dev return 0; 1083a703e490SVasu Dev } 1084a703e490SVasu Dev 1085a703e490SVasu Dev /** 10861875f27eSRobert Love * fcoe_percpu_thread_create() - Create a receive thread for an online CPU 10871875f27eSRobert Love * @cpu: The CPU index of the CPU to create a receive thread for 1088a703e490SVasu Dev */ 1089a703e490SVasu Dev static void fcoe_percpu_thread_create(unsigned int cpu) 1090a703e490SVasu Dev { 1091a703e490SVasu Dev struct fcoe_percpu_s *p; 1092a703e490SVasu Dev struct task_struct *thread; 1093a703e490SVasu Dev 1094a703e490SVasu Dev p = &per_cpu(fcoe_percpu, cpu); 1095a703e490SVasu Dev 1096a703e490SVasu Dev thread = kthread_create(fcoe_percpu_receive_thread, 1097a703e490SVasu Dev (void *)p, "fcoethread/%d", cpu); 1098a703e490SVasu Dev 1099e7a51997SJoe Eykholt if (likely(!IS_ERR(thread))) { 1100a703e490SVasu Dev kthread_bind(thread, cpu); 1101a703e490SVasu Dev wake_up_process(thread); 1102a703e490SVasu Dev 1103a703e490SVasu Dev spin_lock_bh(&p->fcoe_rx_list.lock); 1104a703e490SVasu Dev p->thread = thread; 1105a703e490SVasu Dev spin_unlock_bh(&p->fcoe_rx_list.lock); 1106a703e490SVasu Dev } 1107a703e490SVasu Dev } 1108a703e490SVasu Dev 1109a703e490SVasu Dev /** 11101875f27eSRobert Love * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU 11111875f27eSRobert Love * @cpu: The CPU index of the CPU whose receive thread is to be destroyed 1112a703e490SVasu Dev * 1113a703e490SVasu Dev * Destroys a per-CPU Rx thread. Any pending skbs are moved to the 1114a703e490SVasu Dev * current CPU's Rx thread. If the thread being destroyed is bound to 1115a703e490SVasu Dev * the CPU processing this context the skbs will be freed. 1116a703e490SVasu Dev */ 1117a703e490SVasu Dev static void fcoe_percpu_thread_destroy(unsigned int cpu) 1118a703e490SVasu Dev { 1119a703e490SVasu Dev struct fcoe_percpu_s *p; 1120a703e490SVasu Dev struct task_struct *thread; 1121a703e490SVasu Dev struct page *crc_eof; 1122a703e490SVasu Dev struct sk_buff *skb; 1123a703e490SVasu Dev #ifdef CONFIG_SMP 1124a703e490SVasu Dev struct fcoe_percpu_s *p0; 1125f018b73aSJoe Eykholt unsigned targ_cpu = get_cpu(); 1126a703e490SVasu Dev #endif /* CONFIG_SMP */ 1127a703e490SVasu Dev 1128d5488eb9SRobert Love FCOE_DBG("Destroying receive thread for CPU %d\n", cpu); 1129a703e490SVasu Dev 1130a703e490SVasu Dev /* Prevent any new skbs from being queued for this CPU. */ 1131a703e490SVasu Dev p = &per_cpu(fcoe_percpu, cpu); 1132a703e490SVasu Dev spin_lock_bh(&p->fcoe_rx_list.lock); 1133a703e490SVasu Dev thread = p->thread; 1134a703e490SVasu Dev p->thread = NULL; 1135a703e490SVasu Dev crc_eof = p->crc_eof_page; 1136a703e490SVasu Dev p->crc_eof_page = NULL; 1137a703e490SVasu Dev p->crc_eof_offset = 0; 1138a703e490SVasu Dev spin_unlock_bh(&p->fcoe_rx_list.lock); 1139a703e490SVasu Dev 1140a703e490SVasu Dev #ifdef CONFIG_SMP 1141a703e490SVasu Dev /* 1142a703e490SVasu Dev * Don't bother moving the skb's if this context is running 1143a703e490SVasu Dev * on the same CPU that is having its thread destroyed. This 1144a703e490SVasu Dev * can easily happen when the module is removed. 1145a703e490SVasu Dev */ 1146a703e490SVasu Dev if (cpu != targ_cpu) { 1147a703e490SVasu Dev p0 = &per_cpu(fcoe_percpu, targ_cpu); 1148a703e490SVasu Dev spin_lock_bh(&p0->fcoe_rx_list.lock); 1149a703e490SVasu Dev if (p0->thread) { 1150d5488eb9SRobert Love FCOE_DBG("Moving frames from CPU %d to CPU %d\n", 1151a703e490SVasu Dev cpu, targ_cpu); 1152a703e490SVasu Dev 1153a703e490SVasu Dev while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) 1154a703e490SVasu Dev __skb_queue_tail(&p0->fcoe_rx_list, skb); 1155a703e490SVasu Dev spin_unlock_bh(&p0->fcoe_rx_list.lock); 1156a703e490SVasu Dev } else { 1157a703e490SVasu Dev /* 1158a703e490SVasu Dev * The targeted CPU is not initialized and cannot accept 1159a703e490SVasu Dev * new skbs. Unlock the targeted CPU and drop the skbs 1160a703e490SVasu Dev * on the CPU that is going offline. 1161a703e490SVasu Dev */ 1162a703e490SVasu Dev while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) 1163a703e490SVasu Dev kfree_skb(skb); 1164a703e490SVasu Dev spin_unlock_bh(&p0->fcoe_rx_list.lock); 1165a703e490SVasu Dev } 1166a703e490SVasu Dev } else { 1167a703e490SVasu Dev /* 1168a703e490SVasu Dev * This scenario occurs when the module is being removed 1169a703e490SVasu Dev * and all threads are being destroyed. skbs will continue 1170a703e490SVasu Dev * to be shifted from the CPU thread that is being removed 1171a703e490SVasu Dev * to the CPU thread associated with the CPU that is processing 1172a703e490SVasu Dev * the module removal. Once there is only one CPU Rx thread it 1173a703e490SVasu Dev * will reach this case and we will drop all skbs and later 1174a703e490SVasu Dev * stop the thread. 1175a703e490SVasu Dev */ 1176a703e490SVasu Dev spin_lock_bh(&p->fcoe_rx_list.lock); 1177a703e490SVasu Dev while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) 1178a703e490SVasu Dev kfree_skb(skb); 1179a703e490SVasu Dev spin_unlock_bh(&p->fcoe_rx_list.lock); 1180a703e490SVasu Dev } 1181f018b73aSJoe Eykholt put_cpu(); 1182a703e490SVasu Dev #else 1183a703e490SVasu Dev /* 1184dd3fd72eSChris Leech * This a non-SMP scenario where the singular Rx thread is 1185a703e490SVasu Dev * being removed. Free all skbs and stop the thread. 1186a703e490SVasu Dev */ 1187a703e490SVasu Dev spin_lock_bh(&p->fcoe_rx_list.lock); 1188a703e490SVasu Dev while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) 1189a703e490SVasu Dev kfree_skb(skb); 1190a703e490SVasu Dev spin_unlock_bh(&p->fcoe_rx_list.lock); 1191a703e490SVasu Dev #endif 1192a703e490SVasu Dev 1193a703e490SVasu Dev if (thread) 1194a703e490SVasu Dev kthread_stop(thread); 1195a703e490SVasu Dev 1196a703e490SVasu Dev if (crc_eof) 1197a703e490SVasu Dev put_page(crc_eof); 1198a703e490SVasu Dev } 1199a703e490SVasu Dev 1200a703e490SVasu Dev /** 12011875f27eSRobert Love * fcoe_cpu_callback() - Handler for CPU hotplug events 12021875f27eSRobert Love * @nfb: The callback data block 12031875f27eSRobert Love * @action: The event triggering the callback 12041875f27eSRobert Love * @hcpu: The index of the CPU that the event is for 1205a703e490SVasu Dev * 12061875f27eSRobert Love * This creates or destroys per-CPU data for fcoe 1207a703e490SVasu Dev * 1208a703e490SVasu Dev * Returns NOTIFY_OK always. 1209a703e490SVasu Dev */ 1210a703e490SVasu Dev static int fcoe_cpu_callback(struct notifier_block *nfb, 1211a703e490SVasu Dev unsigned long action, void *hcpu) 1212a703e490SVasu Dev { 1213a703e490SVasu Dev unsigned cpu = (unsigned long)hcpu; 1214a703e490SVasu Dev 1215a703e490SVasu Dev switch (action) { 1216a703e490SVasu Dev case CPU_ONLINE: 1217a703e490SVasu Dev case CPU_ONLINE_FROZEN: 1218d5488eb9SRobert Love FCOE_DBG("CPU %x online: Create Rx thread\n", cpu); 1219a703e490SVasu Dev fcoe_percpu_thread_create(cpu); 1220a703e490SVasu Dev break; 1221a703e490SVasu Dev case CPU_DEAD: 1222a703e490SVasu Dev case CPU_DEAD_FROZEN: 1223d5488eb9SRobert Love FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu); 1224a703e490SVasu Dev fcoe_percpu_thread_destroy(cpu); 1225a703e490SVasu Dev break; 1226a703e490SVasu Dev default: 1227a703e490SVasu Dev break; 1228a703e490SVasu Dev } 1229a703e490SVasu Dev return NOTIFY_OK; 1230a703e490SVasu Dev } 1231a703e490SVasu Dev 1232a703e490SVasu Dev /** 12331875f27eSRobert Love * fcoe_rcv() - Receive packets from a net device 12341875f27eSRobert Love * @skb: The received packet 12351875f27eSRobert Love * @netdev: The net device that the packet was received on 12361875f27eSRobert Love * @ptype: The packet type context 12371875f27eSRobert Love * @olddev: The last device net device 1238a703e490SVasu Dev * 12391875f27eSRobert Love * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a 12401875f27eSRobert Love * FC frame and passes the frame to libfc. 1241a703e490SVasu Dev * 1242a703e490SVasu Dev * Returns: 0 for success 1243a703e490SVasu Dev */ 12441875f27eSRobert Love int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, 1245a703e490SVasu Dev struct packet_type *ptype, struct net_device *olddev) 1246a703e490SVasu Dev { 12471875f27eSRobert Love struct fc_lport *lport; 1248a703e490SVasu Dev struct fcoe_rcv_info *fr; 1249259ad85dSChris Leech struct fcoe_interface *fcoe; 1250a703e490SVasu Dev struct fc_frame_header *fh; 1251a703e490SVasu Dev struct fcoe_percpu_s *fps; 1252519e5135SVasu Dev struct ethhdr *eh; 1253b2f0091fSVasu Dev unsigned int cpu; 1254a703e490SVasu Dev 1255259ad85dSChris Leech fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); 12561875f27eSRobert Love lport = fcoe->ctlr.lp; 12571875f27eSRobert Love if (unlikely(!lport)) { 12581875f27eSRobert Love FCOE_NETDEV_DBG(netdev, "Cannot find hba structure"); 1259a703e490SVasu Dev goto err2; 1260a703e490SVasu Dev } 12611875f27eSRobert Love if (!lport->link_up) 126297c8389dSJoe Eykholt goto err2; 1263a703e490SVasu Dev 12641875f27eSRobert Love FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p " 1265d5488eb9SRobert Love "data:%p tail:%p end:%p sum:%d dev:%s", 1266d5488eb9SRobert Love skb->len, skb->data_len, skb->head, skb->data, 1267d5488eb9SRobert Love skb_tail_pointer(skb), skb_end_pointer(skb), 1268d5488eb9SRobert Love skb->csum, skb->dev ? skb->dev->name : "<NULL>"); 1269a703e490SVasu Dev 1270519e5135SVasu Dev eh = eth_hdr(skb); 1271519e5135SVasu Dev 1272519e5135SVasu Dev if (is_fip_mode(&fcoe->ctlr) && 1273519e5135SVasu Dev compare_ether_addr(eh->h_source, fcoe->ctlr.dest_addr)) { 1274519e5135SVasu Dev FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n", 1275519e5135SVasu Dev eh->h_source); 1276a703e490SVasu Dev goto err; 1277a703e490SVasu Dev } 1278a703e490SVasu Dev 1279a703e490SVasu Dev /* 1280a703e490SVasu Dev * Check for minimum frame length, and make sure required FCoE 1281a703e490SVasu Dev * and FC headers are pulled into the linear data area. 1282a703e490SVasu Dev */ 1283a703e490SVasu Dev if (unlikely((skb->len < FCOE_MIN_FRAME) || 1284a703e490SVasu Dev !pskb_may_pull(skb, FCOE_HEADER_LEN))) 1285a703e490SVasu Dev goto err; 1286a703e490SVasu Dev 1287a703e490SVasu Dev skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); 1288a703e490SVasu Dev fh = (struct fc_frame_header *) skb_transport_header(skb); 1289a703e490SVasu Dev 12900ee31cb5SRobert Love if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) { 12910ee31cb5SRobert Love FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n", 12920ee31cb5SRobert Love eh->h_dest); 12930ee31cb5SRobert Love goto err; 12940ee31cb5SRobert Love } 12950ee31cb5SRobert Love 1296a703e490SVasu Dev fr = fcoe_dev_from_skb(skb); 12971875f27eSRobert Love fr->fr_dev = lport; 1298a703e490SVasu Dev fr->ptype = ptype; 1299a703e490SVasu Dev 1300a703e490SVasu Dev /* 1301b2f0091fSVasu Dev * In case the incoming frame's exchange is originated from 1302b2f0091fSVasu Dev * the initiator, then received frame's exchange id is ANDed 1303b2f0091fSVasu Dev * with fc_cpu_mask bits to get the same cpu on which exchange 1304b2f0091fSVasu Dev * was originated, otherwise just use the current cpu. 1305a703e490SVasu Dev */ 1306b2f0091fSVasu Dev if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) 1307b2f0091fSVasu Dev cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; 1308b2f0091fSVasu Dev else 1309b2f0091fSVasu Dev cpu = smp_processor_id(); 1310a703e490SVasu Dev 1311a703e490SVasu Dev fps = &per_cpu(fcoe_percpu, cpu); 1312a703e490SVasu Dev spin_lock_bh(&fps->fcoe_rx_list.lock); 1313a703e490SVasu Dev if (unlikely(!fps->thread)) { 1314a703e490SVasu Dev /* 1315a703e490SVasu Dev * The targeted CPU is not ready, let's target 1316a703e490SVasu Dev * the first CPU now. For non-SMP systems this 1317a703e490SVasu Dev * will check the same CPU twice. 1318a703e490SVasu Dev */ 13191875f27eSRobert Love FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread " 1320d5488eb9SRobert Love "ready for incoming skb- using first online " 1321d5488eb9SRobert Love "CPU.\n"); 1322a703e490SVasu Dev 1323a703e490SVasu Dev spin_unlock_bh(&fps->fcoe_rx_list.lock); 13246957177fSRusty Russell cpu = cpumask_first(cpu_online_mask); 1325a703e490SVasu Dev fps = &per_cpu(fcoe_percpu, cpu); 1326a703e490SVasu Dev spin_lock_bh(&fps->fcoe_rx_list.lock); 1327a703e490SVasu Dev if (!fps->thread) { 1328a703e490SVasu Dev spin_unlock_bh(&fps->fcoe_rx_list.lock); 1329a703e490SVasu Dev goto err; 1330a703e490SVasu Dev } 1331a703e490SVasu Dev } 1332a703e490SVasu Dev 1333a703e490SVasu Dev /* 1334a703e490SVasu Dev * We now have a valid CPU that we're targeting for 1335a703e490SVasu Dev * this skb. We also have this receive thread locked, 1336a703e490SVasu Dev * so we're free to queue skbs into it's queue. 1337a703e490SVasu Dev */ 1338859b7b64SChris Leech 1339859b7b64SChris Leech /* If this is a SCSI-FCP frame, and this is already executing on the 1340859b7b64SChris Leech * correct CPU, and the queue for this CPU is empty, then go ahead 1341859b7b64SChris Leech * and process the frame directly in the softirq context. 1342859b7b64SChris Leech * This lets us process completions without context switching from the 1343859b7b64SChris Leech * NET_RX softirq, to our receive processing thread, and then back to 1344859b7b64SChris Leech * BLOCK softirq context. 1345859b7b64SChris Leech */ 1346859b7b64SChris Leech if (fh->fh_type == FC_TYPE_FCP && 1347859b7b64SChris Leech cpu == smp_processor_id() && 1348859b7b64SChris Leech skb_queue_empty(&fps->fcoe_rx_list)) { 1349859b7b64SChris Leech spin_unlock_bh(&fps->fcoe_rx_list.lock); 1350859b7b64SChris Leech fcoe_recv_frame(skb); 1351859b7b64SChris Leech } else { 1352a703e490SVasu Dev __skb_queue_tail(&fps->fcoe_rx_list, skb); 1353a703e490SVasu Dev if (fps->fcoe_rx_list.qlen == 1) 1354a703e490SVasu Dev wake_up_process(fps->thread); 1355a703e490SVasu Dev spin_unlock_bh(&fps->fcoe_rx_list.lock); 1356859b7b64SChris Leech } 1357a703e490SVasu Dev 1358a703e490SVasu Dev return 0; 1359a703e490SVasu Dev err: 1360f018b73aSJoe Eykholt per_cpu_ptr(lport->dev_stats, get_cpu())->ErrorFrames++; 1361f018b73aSJoe Eykholt put_cpu(); 1362a703e490SVasu Dev err2: 1363a703e490SVasu Dev kfree_skb(skb); 1364a703e490SVasu Dev return -1; 1365a703e490SVasu Dev } 1366a703e490SVasu Dev 1367a703e490SVasu Dev /** 13688597ae8bSBhanu Prakash Gollapudi * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC 13691875f27eSRobert Love * @skb: The packet to be transmitted 13701875f27eSRobert Love * @tlen: The total length of the trailer 13711875f27eSRobert Love * 1372a703e490SVasu Dev * Returns: 0 for success 1373a703e490SVasu Dev */ 13748597ae8bSBhanu Prakash Gollapudi static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen) 1375a703e490SVasu Dev { 1376a703e490SVasu Dev struct fcoe_percpu_s *fps; 13778597ae8bSBhanu Prakash Gollapudi int rc; 1378a703e490SVasu Dev 1379a703e490SVasu Dev fps = &get_cpu_var(fcoe_percpu); 13808597ae8bSBhanu Prakash Gollapudi rc = fcoe_get_paged_crc_eof(skb, tlen, fps); 1381a703e490SVasu Dev put_cpu_var(fcoe_percpu); 1382a703e490SVasu Dev 13838597ae8bSBhanu Prakash Gollapudi return rc; 1384a703e490SVasu Dev } 1385a703e490SVasu Dev 1386a703e490SVasu Dev /** 13871875f27eSRobert Love * fcoe_xmit() - Transmit a FCoE frame 13881875f27eSRobert Love * @lport: The local port that the frame is to be transmitted for 13891875f27eSRobert Love * @fp: The frame to be transmitted 1390a703e490SVasu Dev * 1391a703e490SVasu Dev * Return: 0 for success 1392a703e490SVasu Dev */ 13931875f27eSRobert Love int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) 1394a703e490SVasu Dev { 13954bb6b515SVasu Dev int wlen; 1396a703e490SVasu Dev u32 crc; 1397a703e490SVasu Dev struct ethhdr *eh; 1398a703e490SVasu Dev struct fcoe_crc_eof *cp; 1399a703e490SVasu Dev struct sk_buff *skb; 1400a703e490SVasu Dev struct fcoe_dev_stats *stats; 1401a703e490SVasu Dev struct fc_frame_header *fh; 1402a703e490SVasu Dev unsigned int hlen; /* header length implies the version */ 1403a703e490SVasu Dev unsigned int tlen; /* trailer length */ 1404a703e490SVasu Dev unsigned int elen; /* eth header, may include vlan */ 14051875f27eSRobert Love struct fcoe_port *port = lport_priv(lport); 14068597ae8bSBhanu Prakash Gollapudi struct fcoe_interface *fcoe = port->priv; 1407a703e490SVasu Dev u8 sof, eof; 1408a703e490SVasu Dev struct fcoe_hdr *hp; 1409a703e490SVasu Dev 1410a703e490SVasu Dev WARN_ON((fr_len(fp) % sizeof(u32)) != 0); 1411a703e490SVasu Dev 1412a703e490SVasu Dev fh = fc_frame_header_get(fp); 141397c8389dSJoe Eykholt skb = fp_skb(fp); 141497c8389dSJoe Eykholt wlen = skb->len / FCOE_WORD_TO_BYTE; 141597c8389dSJoe Eykholt 14161875f27eSRobert Love if (!lport->link_up) { 14173caf02eeSDan Carpenter kfree_skb(skb); 141897c8389dSJoe Eykholt return 0; 1419a703e490SVasu Dev } 1420a703e490SVasu Dev 14219860eeb4SJoe Eykholt if (unlikely(fh->fh_type == FC_TYPE_ELS) && 14221875f27eSRobert Love fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb)) 142397c8389dSJoe Eykholt return 0; 142497c8389dSJoe Eykholt 1425a703e490SVasu Dev sof = fr_sof(fp); 1426a703e490SVasu Dev eof = fr_eof(fp); 1427a703e490SVasu Dev 14284e57e1cbSVasu Dev elen = sizeof(struct ethhdr); 1429a703e490SVasu Dev hlen = sizeof(struct fcoe_hdr); 1430a703e490SVasu Dev tlen = sizeof(struct fcoe_crc_eof); 1431a703e490SVasu Dev wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; 1432a703e490SVasu Dev 1433a703e490SVasu Dev /* crc offload */ 14341875f27eSRobert Love if (likely(lport->crc_offload)) { 1435a703e490SVasu Dev skb->ip_summed = CHECKSUM_PARTIAL; 1436a703e490SVasu Dev skb->csum_start = skb_headroom(skb); 1437a703e490SVasu Dev skb->csum_offset = skb->len; 1438a703e490SVasu Dev crc = 0; 1439a703e490SVasu Dev } else { 1440a703e490SVasu Dev skb->ip_summed = CHECKSUM_NONE; 1441a703e490SVasu Dev crc = fcoe_fc_crc(fp); 1442a703e490SVasu Dev } 1443a703e490SVasu Dev 1444014f5c3fSChris Leech /* copy port crc and eof to the skb buff */ 1445a703e490SVasu Dev if (skb_is_nonlinear(skb)) { 1446a703e490SVasu Dev skb_frag_t *frag; 14478597ae8bSBhanu Prakash Gollapudi if (fcoe_alloc_paged_crc_eof(skb, tlen)) { 1448a703e490SVasu Dev kfree_skb(skb); 1449a703e490SVasu Dev return -ENOMEM; 1450a703e490SVasu Dev } 1451a703e490SVasu Dev frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; 1452a703e490SVasu Dev cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ) 1453a703e490SVasu Dev + frag->page_offset; 1454a703e490SVasu Dev } else { 1455a703e490SVasu Dev cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); 1456a703e490SVasu Dev } 1457a703e490SVasu Dev 1458a703e490SVasu Dev memset(cp, 0, sizeof(*cp)); 1459a703e490SVasu Dev cp->fcoe_eof = eof; 1460a703e490SVasu Dev cp->fcoe_crc32 = cpu_to_le32(~crc); 1461a703e490SVasu Dev 1462a703e490SVasu Dev if (skb_is_nonlinear(skb)) { 1463a703e490SVasu Dev kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ); 1464a703e490SVasu Dev cp = NULL; 1465a703e490SVasu Dev } 1466a703e490SVasu Dev 1467014f5c3fSChris Leech /* adjust skb network/transport offsets to match mac/fcoe/port */ 1468a703e490SVasu Dev skb_push(skb, elen + hlen); 1469a703e490SVasu Dev skb_reset_mac_header(skb); 1470a703e490SVasu Dev skb_reset_network_header(skb); 1471a703e490SVasu Dev skb->mac_len = elen; 1472a703e490SVasu Dev skb->protocol = htons(ETH_P_FCOE); 14733fe9a0baSChris Leech skb->dev = fcoe->netdev; 1474a703e490SVasu Dev 1475a703e490SVasu Dev /* fill up mac and fcoe headers */ 1476a703e490SVasu Dev eh = eth_hdr(skb); 1477a703e490SVasu Dev eh->h_proto = htons(ETH_P_FCOE); 14783fe9a0baSChris Leech memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN); 1479cd229e42SJoe Eykholt if (fcoe->ctlr.map_dest) 1480cd229e42SJoe Eykholt memcpy(eh->h_dest + 3, fh->fh_d_id, 3); 1481a703e490SVasu Dev 14823fe9a0baSChris Leech if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN)) 14833fe9a0baSChris Leech memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN); 1484a703e490SVasu Dev else 148511b56188SChris Leech memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); 1486a703e490SVasu Dev 1487a703e490SVasu Dev hp = (struct fcoe_hdr *)(eh + 1); 1488a703e490SVasu Dev memset(hp, 0, sizeof(*hp)); 1489a703e490SVasu Dev if (FC_FCOE_VER) 1490a703e490SVasu Dev FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); 1491a703e490SVasu Dev hp->fcoe_sof = sof; 1492a703e490SVasu Dev 1493a703e490SVasu Dev /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ 14941875f27eSRobert Love if (lport->seq_offload && fr_max_payload(fp)) { 1495a703e490SVasu Dev skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; 1496a703e490SVasu Dev skb_shinfo(skb)->gso_size = fr_max_payload(fp); 1497a703e490SVasu Dev } else { 1498a703e490SVasu Dev skb_shinfo(skb)->gso_type = 0; 1499a703e490SVasu Dev skb_shinfo(skb)->gso_size = 0; 1500a703e490SVasu Dev } 1501a703e490SVasu Dev /* update tx stats: regardless if LLD fails */ 1502f018b73aSJoe Eykholt stats = per_cpu_ptr(lport->dev_stats, get_cpu()); 1503a703e490SVasu Dev stats->TxFrames++; 1504a703e490SVasu Dev stats->TxWords += wlen; 1505f018b73aSJoe Eykholt put_cpu(); 1506a703e490SVasu Dev 1507a703e490SVasu Dev /* send down to lld */ 15081875f27eSRobert Love fr_dev(fp) = lport; 1509014f5c3fSChris Leech if (port->fcoe_pending_queue.qlen) 15101875f27eSRobert Love fcoe_check_wait_queue(lport, skb); 15114bb6b515SVasu Dev else if (fcoe_start_io(skb)) 15121875f27eSRobert Love fcoe_check_wait_queue(lport, skb); 1513a703e490SVasu Dev 1514a703e490SVasu Dev return 0; 1515a703e490SVasu Dev } 1516a703e490SVasu Dev 1517a703e490SVasu Dev /** 15181875f27eSRobert Love * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion 15191875f27eSRobert Love * @skb: The completed skb (argument required by destructor) 1520e7a51997SJoe Eykholt */ 1521e7a51997SJoe Eykholt static void fcoe_percpu_flush_done(struct sk_buff *skb) 1522e7a51997SJoe Eykholt { 1523e7a51997SJoe Eykholt complete(&fcoe_flush_completion); 1524e7a51997SJoe Eykholt } 1525e7a51997SJoe Eykholt 1526e7a51997SJoe Eykholt /** 152752ee8321SVasu Dev * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC 152852ee8321SVasu Dev * @lport: The local port the frame was received on 152952ee8321SVasu Dev * @fp: The received frame 153052ee8321SVasu Dev * 153152ee8321SVasu Dev * Return: 0 on passing filtering checks 153252ee8321SVasu Dev */ 153352ee8321SVasu Dev static inline int fcoe_filter_frames(struct fc_lport *lport, 153452ee8321SVasu Dev struct fc_frame *fp) 153552ee8321SVasu Dev { 153652ee8321SVasu Dev struct fcoe_interface *fcoe; 153752ee8321SVasu Dev struct fc_frame_header *fh; 153852ee8321SVasu Dev struct sk_buff *skb = (struct sk_buff *)fp; 153952ee8321SVasu Dev struct fcoe_dev_stats *stats; 154052ee8321SVasu Dev 154152ee8321SVasu Dev /* 154252ee8321SVasu Dev * We only check CRC if no offload is available and if it is 154352ee8321SVasu Dev * it's solicited data, in which case, the FCP layer would 154452ee8321SVasu Dev * check it during the copy. 154552ee8321SVasu Dev */ 154652ee8321SVasu Dev if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY) 154752ee8321SVasu Dev fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 154852ee8321SVasu Dev else 154952ee8321SVasu Dev fr_flags(fp) |= FCPHF_CRC_UNCHECKED; 155052ee8321SVasu Dev 155152ee8321SVasu Dev fh = (struct fc_frame_header *) skb_transport_header(skb); 155252ee8321SVasu Dev fh = fc_frame_header_get(fp); 155352ee8321SVasu Dev if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP) 155452ee8321SVasu Dev return 0; 155552ee8321SVasu Dev 15568597ae8bSBhanu Prakash Gollapudi fcoe = ((struct fcoe_port *)lport_priv(lport))->priv; 155752ee8321SVasu Dev if (is_fip_mode(&fcoe->ctlr) && fc_frame_payload_op(fp) == ELS_LOGO && 155852ee8321SVasu Dev ntoh24(fh->fh_s_id) == FC_FID_FLOGI) { 155952ee8321SVasu Dev FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n"); 156052ee8321SVasu Dev return -EINVAL; 156152ee8321SVasu Dev } 156252ee8321SVasu Dev 1563f2f96d20SDan Carpenter if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) || 156452ee8321SVasu Dev le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) { 156552ee8321SVasu Dev fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 156652ee8321SVasu Dev return 0; 156752ee8321SVasu Dev } 156852ee8321SVasu Dev 156952ee8321SVasu Dev stats = per_cpu_ptr(lport->dev_stats, get_cpu()); 157052ee8321SVasu Dev stats->InvalidCRCCount++; 157152ee8321SVasu Dev if (stats->InvalidCRCCount < 5) 157252ee8321SVasu Dev printk(KERN_WARNING "fcoe: dropping frame with CRC error\n"); 157352ee8321SVasu Dev return -EINVAL; 157452ee8321SVasu Dev } 157552ee8321SVasu Dev 157652ee8321SVasu Dev /** 1577859b7b64SChris Leech * fcoe_recv_frame() - process a single received frame 1578859b7b64SChris Leech * @skb: frame to process 1579a703e490SVasu Dev */ 1580859b7b64SChris Leech static void fcoe_recv_frame(struct sk_buff *skb) 1581a703e490SVasu Dev { 1582a703e490SVasu Dev u32 fr_len; 15831875f27eSRobert Love struct fc_lport *lport; 1584a703e490SVasu Dev struct fcoe_rcv_info *fr; 1585a703e490SVasu Dev struct fcoe_dev_stats *stats; 1586a703e490SVasu Dev struct fcoe_crc_eof crc_eof; 1587a703e490SVasu Dev struct fc_frame *fp; 1588014f5c3fSChris Leech struct fcoe_port *port; 1589a703e490SVasu Dev struct fcoe_hdr *hp; 1590a703e490SVasu Dev 1591a703e490SVasu Dev fr = fcoe_dev_from_skb(skb); 15921875f27eSRobert Love lport = fr->fr_dev; 15931875f27eSRobert Love if (unlikely(!lport)) { 1594e7a51997SJoe Eykholt if (skb->destructor != fcoe_percpu_flush_done) 1595e7a51997SJoe Eykholt FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb"); 1596a703e490SVasu Dev kfree_skb(skb); 1597859b7b64SChris Leech return; 1598a703e490SVasu Dev } 1599a703e490SVasu Dev 1600d5488eb9SRobert Love FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d " 1601d5488eb9SRobert Love "head:%p data:%p tail:%p end:%p sum:%d dev:%s", 1602a703e490SVasu Dev skb->len, skb->data_len, 1603a703e490SVasu Dev skb->head, skb->data, skb_tail_pointer(skb), 1604a703e490SVasu Dev skb_end_pointer(skb), skb->csum, 1605a703e490SVasu Dev skb->dev ? skb->dev->name : "<NULL>"); 1606a703e490SVasu Dev 16071875f27eSRobert Love port = lport_priv(lport); 1608a703e490SVasu Dev if (skb_is_nonlinear(skb)) 1609a703e490SVasu Dev skb_linearize(skb); /* not ideal */ 1610a703e490SVasu Dev 1611a703e490SVasu Dev /* 1612a703e490SVasu Dev * Frame length checks and setting up the header pointers 1613a703e490SVasu Dev * was done in fcoe_rcv already. 1614a703e490SVasu Dev */ 1615a703e490SVasu Dev hp = (struct fcoe_hdr *) skb_network_header(skb); 1616a703e490SVasu Dev 1617f018b73aSJoe Eykholt stats = per_cpu_ptr(lport->dev_stats, get_cpu()); 1618a703e490SVasu Dev if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { 1619a703e490SVasu Dev if (stats->ErrorFrames < 5) 1620d5488eb9SRobert Love printk(KERN_WARNING "fcoe: FCoE version " 1621a703e490SVasu Dev "mismatch: The frame has " 1622a703e490SVasu Dev "version %x, but the " 1623a703e490SVasu Dev "initiator supports version " 1624a703e490SVasu Dev "%x\n", FC_FCOE_DECAPS_VER(hp), 1625a703e490SVasu Dev FC_FCOE_VER); 1626f018b73aSJoe Eykholt goto drop; 1627a703e490SVasu Dev } 1628a703e490SVasu Dev 1629a703e490SVasu Dev skb_pull(skb, sizeof(struct fcoe_hdr)); 1630a703e490SVasu Dev fr_len = skb->len - sizeof(struct fcoe_crc_eof); 1631a703e490SVasu Dev 1632a703e490SVasu Dev stats->RxFrames++; 1633a703e490SVasu Dev stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; 1634a703e490SVasu Dev 1635a703e490SVasu Dev fp = (struct fc_frame *)skb; 1636a703e490SVasu Dev fc_frame_init(fp); 16371875f27eSRobert Love fr_dev(fp) = lport; 1638a703e490SVasu Dev fr_sof(fp) = hp->fcoe_sof; 1639a703e490SVasu Dev 1640a703e490SVasu Dev /* Copy out the CRC and EOF trailer for access */ 1641f018b73aSJoe Eykholt if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) 1642f018b73aSJoe Eykholt goto drop; 1643a703e490SVasu Dev fr_eof(fp) = crc_eof.fcoe_eof; 1644a703e490SVasu Dev fr_crc(fp) = crc_eof.fcoe_crc32; 1645f018b73aSJoe Eykholt if (pskb_trim(skb, fr_len)) 1646f018b73aSJoe Eykholt goto drop; 1647a703e490SVasu Dev 164852ee8321SVasu Dev if (!fcoe_filter_frames(lport, fp)) { 1649f018b73aSJoe Eykholt put_cpu(); 16501875f27eSRobert Love fc_exch_recv(lport, fp); 1651f018b73aSJoe Eykholt return; 165252ee8321SVasu Dev } 1653f018b73aSJoe Eykholt drop: 1654f018b73aSJoe Eykholt stats->ErrorFrames++; 1655f018b73aSJoe Eykholt put_cpu(); 1656f018b73aSJoe Eykholt kfree_skb(skb); 1657a703e490SVasu Dev } 1658859b7b64SChris Leech 1659859b7b64SChris Leech /** 1660859b7b64SChris Leech * fcoe_percpu_receive_thread() - The per-CPU packet receive thread 1661859b7b64SChris Leech * @arg: The per-CPU context 1662859b7b64SChris Leech * 1663859b7b64SChris Leech * Return: 0 for success 1664859b7b64SChris Leech */ 1665859b7b64SChris Leech int fcoe_percpu_receive_thread(void *arg) 1666859b7b64SChris Leech { 1667859b7b64SChris Leech struct fcoe_percpu_s *p = arg; 1668859b7b64SChris Leech struct sk_buff *skb; 1669859b7b64SChris Leech 1670859b7b64SChris Leech set_user_nice(current, -20); 1671859b7b64SChris Leech 1672859b7b64SChris Leech while (!kthread_should_stop()) { 1673859b7b64SChris Leech 1674859b7b64SChris Leech spin_lock_bh(&p->fcoe_rx_list.lock); 1675859b7b64SChris Leech while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) { 1676859b7b64SChris Leech set_current_state(TASK_INTERRUPTIBLE); 1677859b7b64SChris Leech spin_unlock_bh(&p->fcoe_rx_list.lock); 1678859b7b64SChris Leech schedule(); 1679859b7b64SChris Leech set_current_state(TASK_RUNNING); 1680859b7b64SChris Leech if (kthread_should_stop()) 1681859b7b64SChris Leech return 0; 1682859b7b64SChris Leech spin_lock_bh(&p->fcoe_rx_list.lock); 1683859b7b64SChris Leech } 1684859b7b64SChris Leech spin_unlock_bh(&p->fcoe_rx_list.lock); 1685859b7b64SChris Leech fcoe_recv_frame(skb); 1686859b7b64SChris Leech } 1687a703e490SVasu Dev return 0; 1688a703e490SVasu Dev } 1689a703e490SVasu Dev 1690a703e490SVasu Dev /** 16911875f27eSRobert Love * fcoe_dev_setup() - Setup the link change notification interface 1692a703e490SVasu Dev */ 1693b0d428adSRandy Dunlap static void fcoe_dev_setup(void) 1694a703e490SVasu Dev { 1695a703e490SVasu Dev register_netdevice_notifier(&fcoe_notifier); 1696a703e490SVasu Dev } 1697a703e490SVasu Dev 1698a703e490SVasu Dev /** 16991875f27eSRobert Love * fcoe_dev_cleanup() - Cleanup the link change notification interface 1700a703e490SVasu Dev */ 1701a703e490SVasu Dev static void fcoe_dev_cleanup(void) 1702a703e490SVasu Dev { 1703a703e490SVasu Dev unregister_netdevice_notifier(&fcoe_notifier); 1704a703e490SVasu Dev } 1705a703e490SVasu Dev 1706a703e490SVasu Dev /** 17071875f27eSRobert Love * fcoe_device_notification() - Handler for net device events 17081875f27eSRobert Love * @notifier: The context of the notification 17091875f27eSRobert Love * @event: The type of event 17101875f27eSRobert Love * @ptr: The net device that the event was on 1711a703e490SVasu Dev * 17121875f27eSRobert Love * This function is called by the Ethernet driver in case of link change event. 1713a703e490SVasu Dev * 1714a703e490SVasu Dev * Returns: 0 for success 1715a703e490SVasu Dev */ 1716a703e490SVasu Dev static int fcoe_device_notification(struct notifier_block *notifier, 1717a703e490SVasu Dev ulong event, void *ptr) 1718a703e490SVasu Dev { 17191875f27eSRobert Love struct fc_lport *lport = NULL; 17201d1b88dcSVasu Dev struct net_device *netdev = ptr; 1721014f5c3fSChris Leech struct fcoe_interface *fcoe; 17222e70e241SChris Leech struct fcoe_port *port; 1723a703e490SVasu Dev struct fcoe_dev_stats *stats; 172497c8389dSJoe Eykholt u32 link_possible = 1; 1725a703e490SVasu Dev u32 mfs; 1726a703e490SVasu Dev int rc = NOTIFY_OK; 1727a703e490SVasu Dev 1728014f5c3fSChris Leech list_for_each_entry(fcoe, &fcoe_hostlist, list) { 172925024989SChris Leech if (fcoe->netdev == netdev) { 17301875f27eSRobert Love lport = fcoe->ctlr.lp; 1731a703e490SVasu Dev break; 1732a703e490SVasu Dev } 1733a703e490SVasu Dev } 17341875f27eSRobert Love if (!lport) { 1735a703e490SVasu Dev rc = NOTIFY_DONE; 1736a703e490SVasu Dev goto out; 1737a703e490SVasu Dev } 1738a703e490SVasu Dev 1739a703e490SVasu Dev switch (event) { 1740a703e490SVasu Dev case NETDEV_DOWN: 1741a703e490SVasu Dev case NETDEV_GOING_DOWN: 174297c8389dSJoe Eykholt link_possible = 0; 1743a703e490SVasu Dev break; 1744a703e490SVasu Dev case NETDEV_UP: 1745a703e490SVasu Dev case NETDEV_CHANGE: 1746a703e490SVasu Dev break; 1747a703e490SVasu Dev case NETDEV_CHANGEMTU: 17487221d7e5SYi Zou if (netdev->features & NETIF_F_FCOE_MTU) 17497221d7e5SYi Zou break; 17501d1b88dcSVasu Dev mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + 1751a703e490SVasu Dev sizeof(struct fcoe_crc_eof)); 1752a703e490SVasu Dev if (mfs >= FC_MIN_MAX_FRAME) 17531875f27eSRobert Love fc_set_mfs(lport, mfs); 1754a703e490SVasu Dev break; 1755a703e490SVasu Dev case NETDEV_REGISTER: 1756a703e490SVasu Dev break; 17572e70e241SChris Leech case NETDEV_UNREGISTER: 17582e70e241SChris Leech list_del(&fcoe->list); 17592e70e241SChris Leech port = lport_priv(fcoe->ctlr.lp); 17602e70e241SChris Leech fcoe_interface_cleanup(fcoe); 17612ca32b48STejun Heo queue_work(fcoe_wq, &port->destroy_work); 17622e70e241SChris Leech goto out; 17632e70e241SChris Leech break; 176454a5b21dSYi Zou case NETDEV_FEAT_CHANGE: 176554a5b21dSYi Zou fcoe_netdev_features_change(lport, netdev); 176654a5b21dSYi Zou break; 1767a703e490SVasu Dev default: 17681d1b88dcSVasu Dev FCOE_NETDEV_DBG(netdev, "Unknown event %ld " 1769d5488eb9SRobert Love "from netdev netlink\n", event); 1770a703e490SVasu Dev } 17715e4f8fe7SRobert Love 17725e4f8fe7SRobert Love fcoe_link_speed_update(lport); 17735e4f8fe7SRobert Love 17741875f27eSRobert Love if (link_possible && !fcoe_link_ok(lport)) 17753fe9a0baSChris Leech fcoe_ctlr_link_up(&fcoe->ctlr); 17763fe9a0baSChris Leech else if (fcoe_ctlr_link_down(&fcoe->ctlr)) { 1777f018b73aSJoe Eykholt stats = per_cpu_ptr(lport->dev_stats, get_cpu()); 1778a703e490SVasu Dev stats->LinkFailureCount++; 1779f018b73aSJoe Eykholt put_cpu(); 17801875f27eSRobert Love fcoe_clean_pending_queue(lport); 1781a703e490SVasu Dev } 1782a703e490SVasu Dev out: 1783a703e490SVasu Dev return rc; 1784a703e490SVasu Dev } 1785a703e490SVasu Dev 1786a703e490SVasu Dev /** 178755a66d3cSVasu Dev * fcoe_disable() - Disables a FCoE interface 178878a58246SYi Zou * @netdev : The net_device object the Ethernet interface to create on 178955a66d3cSVasu Dev * 179078a58246SYi Zou * Called from fcoe transport. 179155a66d3cSVasu Dev * 179255a66d3cSVasu Dev * Returns: 0 for success 179355a66d3cSVasu Dev */ 179478a58246SYi Zou static int fcoe_disable(struct net_device *netdev) 179555a66d3cSVasu Dev { 179655a66d3cSVasu Dev struct fcoe_interface *fcoe; 179755a66d3cSVasu Dev int rc = 0; 179855a66d3cSVasu Dev 179955a66d3cSVasu Dev mutex_lock(&fcoe_config_mutex); 180055a66d3cSVasu Dev 1801ee5df628SRobert Love rtnl_lock(); 180255a66d3cSVasu Dev fcoe = fcoe_hostlist_lookup_port(netdev); 180355a66d3cSVasu Dev rtnl_unlock(); 180455a66d3cSVasu Dev 18059ee50e48SChris Leech if (fcoe) { 18069ee50e48SChris Leech fcoe_ctlr_link_down(&fcoe->ctlr); 18079d4cbc05SVasu Dev fcoe_clean_pending_queue(fcoe->ctlr.lp); 18089ee50e48SChris Leech } else 180955a66d3cSVasu Dev rc = -ENODEV; 181055a66d3cSVasu Dev 181155a66d3cSVasu Dev mutex_unlock(&fcoe_config_mutex); 181255a66d3cSVasu Dev return rc; 181355a66d3cSVasu Dev } 181455a66d3cSVasu Dev 181555a66d3cSVasu Dev /** 181655a66d3cSVasu Dev * fcoe_enable() - Enables a FCoE interface 181778a58246SYi Zou * @netdev : The net_device object the Ethernet interface to create on 181855a66d3cSVasu Dev * 181978a58246SYi Zou * Called from fcoe transport. 182055a66d3cSVasu Dev * 182155a66d3cSVasu Dev * Returns: 0 for success 182255a66d3cSVasu Dev */ 182378a58246SYi Zou static int fcoe_enable(struct net_device *netdev) 182455a66d3cSVasu Dev { 182555a66d3cSVasu Dev struct fcoe_interface *fcoe; 182655a66d3cSVasu Dev int rc = 0; 182755a66d3cSVasu Dev 182855a66d3cSVasu Dev mutex_lock(&fcoe_config_mutex); 1829ee5df628SRobert Love rtnl_lock(); 183055a66d3cSVasu Dev fcoe = fcoe_hostlist_lookup_port(netdev); 183155a66d3cSVasu Dev rtnl_unlock(); 183255a66d3cSVasu Dev 18339d4cbc05SVasu Dev if (!fcoe) 183455a66d3cSVasu Dev rc = -ENODEV; 18359d4cbc05SVasu Dev else if (!fcoe_link_ok(fcoe->ctlr.lp)) 18369d4cbc05SVasu Dev fcoe_ctlr_link_up(&fcoe->ctlr); 183755a66d3cSVasu Dev 183855a66d3cSVasu Dev mutex_unlock(&fcoe_config_mutex); 183955a66d3cSVasu Dev return rc; 184055a66d3cSVasu Dev } 184155a66d3cSVasu Dev 184255a66d3cSVasu Dev /** 18431875f27eSRobert Love * fcoe_destroy() - Destroy a FCoE interface 184478a58246SYi Zou * @netdev : The net_device object the Ethernet interface to create on 18451875f27eSRobert Love * 184678a58246SYi Zou * Called from fcoe transport 1847a703e490SVasu Dev * 1848a703e490SVasu Dev * Returns: 0 for success 1849a703e490SVasu Dev */ 185078a58246SYi Zou static int fcoe_destroy(struct net_device *netdev) 1851a703e490SVasu Dev { 1852030f4e00SChris Leech struct fcoe_interface *fcoe; 1853f04ca1b6SVasu Dev struct fc_lport *lport; 18548eca355fSMike Christie int rc = 0; 1855a703e490SVasu Dev 1856dfc1d0feSChris Leech mutex_lock(&fcoe_config_mutex); 1857ee5df628SRobert Love rtnl_lock(); 18582e70e241SChris Leech fcoe = fcoe_hostlist_lookup_port(netdev); 18592e70e241SChris Leech if (!fcoe) { 1860090eb6c4SChris Leech rtnl_unlock(); 1861a703e490SVasu Dev rc = -ENODEV; 186278a58246SYi Zou goto out_nodev; 1863a703e490SVasu Dev } 1864f04ca1b6SVasu Dev lport = fcoe->ctlr.lp; 186554a5b21dSYi Zou list_del(&fcoe->list); 1866f04ca1b6SVasu Dev fcoe_interface_cleanup(fcoe); 1867f04ca1b6SVasu Dev rtnl_unlock(); 1868f04ca1b6SVasu Dev fcoe_if_destroy(lport); 1869a703e490SVasu Dev out_nodev: 1870dfc1d0feSChris Leech mutex_unlock(&fcoe_config_mutex); 1871a703e490SVasu Dev return rc; 1872a703e490SVasu Dev } 1873a703e490SVasu Dev 18741875f27eSRobert Love /** 18751875f27eSRobert Love * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context 18761875f27eSRobert Love * @work: Handle to the FCoE port to be destroyed 18771875f27eSRobert Love */ 18782e70e241SChris Leech static void fcoe_destroy_work(struct work_struct *work) 18792e70e241SChris Leech { 18802e70e241SChris Leech struct fcoe_port *port; 18812e70e241SChris Leech 18822e70e241SChris Leech port = container_of(work, struct fcoe_port, destroy_work); 18832e70e241SChris Leech mutex_lock(&fcoe_config_mutex); 18842e70e241SChris Leech fcoe_if_destroy(port->lport); 18852e70e241SChris Leech mutex_unlock(&fcoe_config_mutex); 18862e70e241SChris Leech } 18872e70e241SChris Leech 1888a703e490SVasu Dev /** 188978a58246SYi Zou * fcoe_match() - Check if the FCoE is supported on the given netdevice 189078a58246SYi Zou * @netdev : The net_device object the Ethernet interface to create on 18911875f27eSRobert Love * 189278a58246SYi Zou * Called from fcoe transport. 189378a58246SYi Zou * 189478a58246SYi Zou * Returns: always returns true as this is the default FCoE transport, 189578a58246SYi Zou * i.e., support all netdevs. 189678a58246SYi Zou */ 189778a58246SYi Zou static bool fcoe_match(struct net_device *netdev) 189878a58246SYi Zou { 189978a58246SYi Zou return true; 190078a58246SYi Zou } 190178a58246SYi Zou 190278a58246SYi Zou /** 190378a58246SYi Zou * fcoe_create() - Create a fcoe interface 190478a58246SYi Zou * @netdev : The net_device object the Ethernet interface to create on 190578a58246SYi Zou * @fip_mode: The FIP mode for this creation 190678a58246SYi Zou * 190778a58246SYi Zou * Called from fcoe transport 1908a703e490SVasu Dev * 1909a703e490SVasu Dev * Returns: 0 for success 1910a703e490SVasu Dev */ 191178a58246SYi Zou static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode) 1912a703e490SVasu Dev { 1913a703e490SVasu Dev int rc; 1914030f4e00SChris Leech struct fcoe_interface *fcoe; 1915af7f85d9SChris Leech struct fc_lport *lport; 1916a703e490SVasu Dev 1917dfc1d0feSChris Leech mutex_lock(&fcoe_config_mutex); 1918ee5df628SRobert Love rtnl_lock(); 191934ce27bcSVasu Dev 1920a703e490SVasu Dev /* look for existing lport */ 1921a703e490SVasu Dev if (fcoe_hostlist_lookup(netdev)) { 1922a703e490SVasu Dev rc = -EEXIST; 192378a58246SYi Zou goto out_nodev; 1924a703e490SVasu Dev } 1925a703e490SVasu Dev 19261dd454d9SJoe Eykholt fcoe = fcoe_interface_create(netdev, fip_mode); 19277287fb91SRobert Love if (IS_ERR(fcoe)) { 19287287fb91SRobert Love rc = PTR_ERR(fcoe); 192978a58246SYi Zou goto out_nodev; 1930030f4e00SChris Leech } 1931030f4e00SChris Leech 19329a05753bSChris Leech lport = fcoe_if_create(fcoe, &netdev->dev, 0); 1933af7f85d9SChris Leech if (IS_ERR(lport)) { 1934d5488eb9SRobert Love printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", 1935a703e490SVasu Dev netdev->name); 1936a703e490SVasu Dev rc = -EIO; 19372e70e241SChris Leech fcoe_interface_cleanup(fcoe); 1938030f4e00SChris Leech goto out_free; 1939a703e490SVasu Dev } 1940030f4e00SChris Leech 194154b649f8SChris Leech /* Make this the "master" N_Port */ 194254b649f8SChris Leech fcoe->ctlr.lp = lport; 1943030f4e00SChris Leech 1944c863df33SChris Leech /* add to lports list */ 1945c863df33SChris Leech fcoe_hostlist_add(lport); 1946c863df33SChris Leech 194754b649f8SChris Leech /* start FIP Discovery and FLOGI */ 194854b649f8SChris Leech lport->boot_time = jiffies; 194954b649f8SChris Leech fc_fabric_login(lport); 195054b649f8SChris Leech if (!fcoe_link_ok(lport)) 195154b649f8SChris Leech fcoe_ctlr_link_up(&fcoe->ctlr); 195254b649f8SChris Leech 195354b649f8SChris Leech /* 195454b649f8SChris Leech * Release from init in fcoe_interface_create(), on success lport 195554b649f8SChris Leech * should be holding a reference taken in fcoe_if_create(). 195654b649f8SChris Leech */ 1957030f4e00SChris Leech fcoe_interface_put(fcoe); 19586409ea65SRob Love rtnl_unlock(); 19596409ea65SRob Love mutex_unlock(&fcoe_config_mutex); 19606409ea65SRob Love 19616409ea65SRob Love return 0; 19626409ea65SRob Love out_free: 19636409ea65SRob Love fcoe_interface_put(fcoe); 1964a703e490SVasu Dev out_nodev: 196534ce27bcSVasu Dev rtnl_unlock(); 1966dfc1d0feSChris Leech mutex_unlock(&fcoe_config_mutex); 1967a703e490SVasu Dev return rc; 1968a703e490SVasu Dev } 1969a703e490SVasu Dev 1970a703e490SVasu Dev /** 19715e4f8fe7SRobert Love * fcoe_link_speed_update() - Update the supported and actual link speeds 19725e4f8fe7SRobert Love * @lport: The local port to update speeds for 1973a703e490SVasu Dev * 19745e4f8fe7SRobert Love * Returns: 0 if the ethtool query was successful 19755e4f8fe7SRobert Love * -1 if the ethtool query failed 1976a703e490SVasu Dev */ 19775e4f8fe7SRobert Love int fcoe_link_speed_update(struct fc_lport *lport) 1978a703e490SVasu Dev { 19798597ae8bSBhanu Prakash Gollapudi struct net_device *netdev = fcoe_netdev(lport); 19808ae6dacaSDavid Decotigny struct ethtool_cmd ecmd; 1981a703e490SVasu Dev 19825e4f8fe7SRobert Love if (!dev_ethtool_get_settings(netdev, &ecmd)) { 19831875f27eSRobert Love lport->link_supported_speeds &= 1984a703e490SVasu Dev ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT); 1985a703e490SVasu Dev if (ecmd.supported & (SUPPORTED_1000baseT_Half | 1986a703e490SVasu Dev SUPPORTED_1000baseT_Full)) 19871875f27eSRobert Love lport->link_supported_speeds |= FC_PORTSPEED_1GBIT; 1988a703e490SVasu Dev if (ecmd.supported & SUPPORTED_10000baseT_Full) 19891875f27eSRobert Love lport->link_supported_speeds |= 1990a703e490SVasu Dev FC_PORTSPEED_10GBIT; 19918ae6dacaSDavid Decotigny switch (ethtool_cmd_speed(&ecmd)) { 19928ae6dacaSDavid Decotigny case SPEED_1000: 19931875f27eSRobert Love lport->link_speed = FC_PORTSPEED_1GBIT; 19948ae6dacaSDavid Decotigny break; 19958ae6dacaSDavid Decotigny case SPEED_10000: 19961875f27eSRobert Love lport->link_speed = FC_PORTSPEED_10GBIT; 19978ae6dacaSDavid Decotigny break; 19988ae6dacaSDavid Decotigny } 19992f718d64SYi Zou return 0; 20002f718d64SYi Zou } 20012f718d64SYi Zou return -1; 2002a703e490SVasu Dev } 2003a703e490SVasu Dev 2004a703e490SVasu Dev /** 20055e4f8fe7SRobert Love * fcoe_link_ok() - Check if the link is OK for a local port 20065e4f8fe7SRobert Love * @lport: The local port to check link on 20075e4f8fe7SRobert Love * 20085e4f8fe7SRobert Love * Returns: 0 if link is UP and OK, -1 if not 20095e4f8fe7SRobert Love * 20105e4f8fe7SRobert Love */ 20115e4f8fe7SRobert Love int fcoe_link_ok(struct fc_lport *lport) 20125e4f8fe7SRobert Love { 20138597ae8bSBhanu Prakash Gollapudi struct net_device *netdev = fcoe_netdev(lport); 20145e4f8fe7SRobert Love 20155e4f8fe7SRobert Love if (netif_oper_up(netdev)) 20165e4f8fe7SRobert Love return 0; 20175e4f8fe7SRobert Love return -1; 20185e4f8fe7SRobert Love } 20195e4f8fe7SRobert Love 20205e4f8fe7SRobert Love /** 20211875f27eSRobert Love * fcoe_percpu_clean() - Clear all pending skbs for an local port 20221875f27eSRobert Love * @lport: The local port whose skbs are to be cleared 2023e7a51997SJoe Eykholt * 2024e7a51997SJoe Eykholt * Must be called with fcoe_create_mutex held to single-thread completion. 2025e7a51997SJoe Eykholt * 2026e7a51997SJoe Eykholt * This flushes the pending skbs by adding a new skb to each queue and 2027e7a51997SJoe Eykholt * waiting until they are all freed. This assures us that not only are 2028e7a51997SJoe Eykholt * there no packets that will be handled by the lport, but also that any 2029e7a51997SJoe Eykholt * threads already handling packet have returned. 2030a703e490SVasu Dev */ 20311875f27eSRobert Love void fcoe_percpu_clean(struct fc_lport *lport) 2032a703e490SVasu Dev { 2033a703e490SVasu Dev struct fcoe_percpu_s *pp; 2034a703e490SVasu Dev struct fcoe_rcv_info *fr; 2035a703e490SVasu Dev struct sk_buff_head *list; 2036a703e490SVasu Dev struct sk_buff *skb, *next; 2037a703e490SVasu Dev struct sk_buff *head; 2038a703e490SVasu Dev unsigned int cpu; 2039a703e490SVasu Dev 2040a703e490SVasu Dev for_each_possible_cpu(cpu) { 2041a703e490SVasu Dev pp = &per_cpu(fcoe_percpu, cpu); 2042a703e490SVasu Dev spin_lock_bh(&pp->fcoe_rx_list.lock); 2043a703e490SVasu Dev list = &pp->fcoe_rx_list; 2044a703e490SVasu Dev head = list->next; 2045a703e490SVasu Dev for (skb = head; skb != (struct sk_buff *)list; 2046a703e490SVasu Dev skb = next) { 2047a703e490SVasu Dev next = skb->next; 2048a703e490SVasu Dev fr = fcoe_dev_from_skb(skb); 20491875f27eSRobert Love if (fr->fr_dev == lport) { 2050a703e490SVasu Dev __skb_unlink(skb, list); 2051a703e490SVasu Dev kfree_skb(skb); 2052a703e490SVasu Dev } 2053a703e490SVasu Dev } 2054e7a51997SJoe Eykholt 2055e7a51997SJoe Eykholt if (!pp->thread || !cpu_online(cpu)) { 2056a703e490SVasu Dev spin_unlock_bh(&pp->fcoe_rx_list.lock); 2057e7a51997SJoe Eykholt continue; 2058e7a51997SJoe Eykholt } 2059e7a51997SJoe Eykholt 2060e7a51997SJoe Eykholt skb = dev_alloc_skb(0); 2061e7a51997SJoe Eykholt if (!skb) { 2062e7a51997SJoe Eykholt spin_unlock_bh(&pp->fcoe_rx_list.lock); 2063e7a51997SJoe Eykholt continue; 2064e7a51997SJoe Eykholt } 2065e7a51997SJoe Eykholt skb->destructor = fcoe_percpu_flush_done; 2066e7a51997SJoe Eykholt 2067e7a51997SJoe Eykholt __skb_queue_tail(&pp->fcoe_rx_list, skb); 2068e7a51997SJoe Eykholt if (pp->fcoe_rx_list.qlen == 1) 2069e7a51997SJoe Eykholt wake_up_process(pp->thread); 2070e7a51997SJoe Eykholt spin_unlock_bh(&pp->fcoe_rx_list.lock); 2071e7a51997SJoe Eykholt 2072e7a51997SJoe Eykholt wait_for_completion(&fcoe_flush_completion); 2073a703e490SVasu Dev } 2074a703e490SVasu Dev } 2075a703e490SVasu Dev 2076a703e490SVasu Dev /** 20771875f27eSRobert Love * fcoe_reset() - Reset a local port 20781875f27eSRobert Love * @shost: The SCSI host associated with the local port to be reset 2079a703e490SVasu Dev * 20801875f27eSRobert Love * Returns: Always 0 (return value required by FC transport template) 2081a703e490SVasu Dev */ 2082a703e490SVasu Dev int fcoe_reset(struct Scsi_Host *shost) 2083a703e490SVasu Dev { 2084a703e490SVasu Dev struct fc_lport *lport = shost_priv(shost); 2085d2f80952SVasu Dev struct fcoe_port *port = lport_priv(lport); 2086d2f80952SVasu Dev struct fcoe_interface *fcoe = port->priv; 2087d2f80952SVasu Dev 2088d2f80952SVasu Dev fcoe_ctlr_link_down(&fcoe->ctlr); 2089d2f80952SVasu Dev fcoe_clean_pending_queue(fcoe->ctlr.lp); 2090d2f80952SVasu Dev if (!fcoe_link_ok(fcoe->ctlr.lp)) 2091d2f80952SVasu Dev fcoe_ctlr_link_up(&fcoe->ctlr); 2092a703e490SVasu Dev return 0; 2093a703e490SVasu Dev } 2094a703e490SVasu Dev 2095a703e490SVasu Dev /** 20961875f27eSRobert Love * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device 20971875f27eSRobert Love * @netdev: The net device used as a key 2098a703e490SVasu Dev * 20991875f27eSRobert Love * Locking: Must be called with the RNL mutex held. 21001875f27eSRobert Love * 21011875f27eSRobert Love * Returns: NULL or the FCoE interface 2102a703e490SVasu Dev */ 2103014f5c3fSChris Leech static struct fcoe_interface * 21041875f27eSRobert Love fcoe_hostlist_lookup_port(const struct net_device *netdev) 2105a703e490SVasu Dev { 2106014f5c3fSChris Leech struct fcoe_interface *fcoe; 2107a703e490SVasu Dev 2108014f5c3fSChris Leech list_for_each_entry(fcoe, &fcoe_hostlist, list) { 21091875f27eSRobert Love if (fcoe->netdev == netdev) 2110014f5c3fSChris Leech return fcoe; 2111a703e490SVasu Dev } 2112a703e490SVasu Dev return NULL; 2113a703e490SVasu Dev } 2114a703e490SVasu Dev 2115a703e490SVasu Dev /** 21161875f27eSRobert Love * fcoe_hostlist_lookup() - Find the local port associated with a 21171875f27eSRobert Love * given net device 21181875f27eSRobert Love * @netdev: The netdevice used as a key 2119a703e490SVasu Dev * 21201875f27eSRobert Love * Locking: Must be called with the RTNL mutex held 21211875f27eSRobert Love * 21221875f27eSRobert Love * Returns: NULL or the local port 2123a703e490SVasu Dev */ 2124090eb6c4SChris Leech static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) 2125a703e490SVasu Dev { 2126014f5c3fSChris Leech struct fcoe_interface *fcoe; 2127a703e490SVasu Dev 2128014f5c3fSChris Leech fcoe = fcoe_hostlist_lookup_port(netdev); 21293fe9a0baSChris Leech return (fcoe) ? fcoe->ctlr.lp : NULL; 2130a703e490SVasu Dev } 2131a703e490SVasu Dev 2132a703e490SVasu Dev /** 21331875f27eSRobert Love * fcoe_hostlist_add() - Add the FCoE interface identified by a local 21341875f27eSRobert Love * port to the hostlist 21351875f27eSRobert Love * @lport: The local port that identifies the FCoE interface to be added 21361875f27eSRobert Love * 21371875f27eSRobert Love * Locking: must be called with the RTNL mutex held 2138a703e490SVasu Dev * 2139a703e490SVasu Dev * Returns: 0 for success 2140a703e490SVasu Dev */ 2141090eb6c4SChris Leech static int fcoe_hostlist_add(const struct fc_lport *lport) 2142a703e490SVasu Dev { 2143014f5c3fSChris Leech struct fcoe_interface *fcoe; 2144014f5c3fSChris Leech struct fcoe_port *port; 2145a703e490SVasu Dev 2146014f5c3fSChris Leech fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); 2147014f5c3fSChris Leech if (!fcoe) { 2148014f5c3fSChris Leech port = lport_priv(lport); 21498597ae8bSBhanu Prakash Gollapudi fcoe = port->priv; 2150014f5c3fSChris Leech list_add_tail(&fcoe->list, &fcoe_hostlist); 2151a703e490SVasu Dev } 2152a703e490SVasu Dev return 0; 2153a703e490SVasu Dev } 2154a703e490SVasu Dev 215578a58246SYi Zou 215678a58246SYi Zou static struct fcoe_transport fcoe_sw_transport = { 215778a58246SYi Zou .name = {FCOE_TRANSPORT_DEFAULT}, 215878a58246SYi Zou .attached = false, 215978a58246SYi Zou .list = LIST_HEAD_INIT(fcoe_sw_transport.list), 216078a58246SYi Zou .match = fcoe_match, 216178a58246SYi Zou .create = fcoe_create, 216278a58246SYi Zou .destroy = fcoe_destroy, 216378a58246SYi Zou .enable = fcoe_enable, 216478a58246SYi Zou .disable = fcoe_disable, 216578a58246SYi Zou }; 216678a58246SYi Zou 2167a703e490SVasu Dev /** 21681875f27eSRobert Love * fcoe_init() - Initialize fcoe.ko 2169a703e490SVasu Dev * 21701875f27eSRobert Love * Returns: 0 on success, or a negative value on failure 2171a703e490SVasu Dev */ 2172a703e490SVasu Dev static int __init fcoe_init(void) 2173a703e490SVasu Dev { 21741875f27eSRobert Love struct fcoe_percpu_s *p; 2175a703e490SVasu Dev unsigned int cpu; 2176a703e490SVasu Dev int rc = 0; 2177a703e490SVasu Dev 21782ca32b48STejun Heo fcoe_wq = alloc_workqueue("fcoe", 0, 0); 21792ca32b48STejun Heo if (!fcoe_wq) 21802ca32b48STejun Heo return -ENOMEM; 21812ca32b48STejun Heo 218278a58246SYi Zou /* register as a fcoe transport */ 218378a58246SYi Zou rc = fcoe_transport_attach(&fcoe_sw_transport); 218478a58246SYi Zou if (rc) { 218578a58246SYi Zou printk(KERN_ERR "failed to register an fcoe transport, check " 218678a58246SYi Zou "if libfcoe is loaded\n"); 218778a58246SYi Zou return rc; 218878a58246SYi Zou } 218978a58246SYi Zou 2190dfc1d0feSChris Leech mutex_lock(&fcoe_config_mutex); 2191dfc1d0feSChris Leech 2192a703e490SVasu Dev for_each_possible_cpu(cpu) { 2193a703e490SVasu Dev p = &per_cpu(fcoe_percpu, cpu); 2194a703e490SVasu Dev skb_queue_head_init(&p->fcoe_rx_list); 2195a703e490SVasu Dev } 2196a703e490SVasu Dev 2197a703e490SVasu Dev for_each_online_cpu(cpu) 2198a703e490SVasu Dev fcoe_percpu_thread_create(cpu); 2199a703e490SVasu Dev 2200a703e490SVasu Dev /* Initialize per CPU interrupt thread */ 2201a703e490SVasu Dev rc = register_hotcpu_notifier(&fcoe_cpu_notifier); 2202a703e490SVasu Dev if (rc) 2203a703e490SVasu Dev goto out_free; 2204a703e490SVasu Dev 2205a703e490SVasu Dev /* Setup link change notification */ 2206a703e490SVasu Dev fcoe_dev_setup(); 2207a703e490SVasu Dev 22085892c32fSChris Leech rc = fcoe_if_init(); 22095892c32fSChris Leech if (rc) 22105892c32fSChris Leech goto out_free; 2211a703e490SVasu Dev 2212dfc1d0feSChris Leech mutex_unlock(&fcoe_config_mutex); 2213a703e490SVasu Dev return 0; 2214a703e490SVasu Dev 2215a703e490SVasu Dev out_free: 2216a703e490SVasu Dev for_each_online_cpu(cpu) { 2217a703e490SVasu Dev fcoe_percpu_thread_destroy(cpu); 2218a703e490SVasu Dev } 2219dfc1d0feSChris Leech mutex_unlock(&fcoe_config_mutex); 22202ca32b48STejun Heo destroy_workqueue(fcoe_wq); 2221a703e490SVasu Dev return rc; 2222a703e490SVasu Dev } 2223a703e490SVasu Dev module_init(fcoe_init); 2224a703e490SVasu Dev 2225a703e490SVasu Dev /** 22261875f27eSRobert Love * fcoe_exit() - Clean up fcoe.ko 2227a703e490SVasu Dev * 22281875f27eSRobert Love * Returns: 0 on success or a negative value on failure 2229a703e490SVasu Dev */ 2230a703e490SVasu Dev static void __exit fcoe_exit(void) 2231a703e490SVasu Dev { 2232014f5c3fSChris Leech struct fcoe_interface *fcoe, *tmp; 22332e70e241SChris Leech struct fcoe_port *port; 22341875f27eSRobert Love unsigned int cpu; 2235a703e490SVasu Dev 2236dfc1d0feSChris Leech mutex_lock(&fcoe_config_mutex); 2237dfc1d0feSChris Leech 2238a703e490SVasu Dev fcoe_dev_cleanup(); 2239a703e490SVasu Dev 2240a703e490SVasu Dev /* releases the associated fcoe hosts */ 2241090eb6c4SChris Leech rtnl_lock(); 2242090eb6c4SChris Leech list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { 2243c863df33SChris Leech list_del(&fcoe->list); 22442e70e241SChris Leech port = lport_priv(fcoe->ctlr.lp); 22452e70e241SChris Leech fcoe_interface_cleanup(fcoe); 22462ca32b48STejun Heo queue_work(fcoe_wq, &port->destroy_work); 2247c863df33SChris Leech } 2248090eb6c4SChris Leech rtnl_unlock(); 2249a703e490SVasu Dev 2250a703e490SVasu Dev unregister_hotcpu_notifier(&fcoe_cpu_notifier); 2251a703e490SVasu Dev 2252014f5c3fSChris Leech for_each_online_cpu(cpu) 2253a703e490SVasu Dev fcoe_percpu_thread_destroy(cpu); 2254a703e490SVasu Dev 2255dfc1d0feSChris Leech mutex_unlock(&fcoe_config_mutex); 22562e70e241SChris Leech 22572ca32b48STejun Heo /* 22582ca32b48STejun Heo * destroy_work's may be chained but destroy_workqueue() 22592ca32b48STejun Heo * can take care of them. Just kill the fcoe_wq. 22602ca32b48STejun Heo */ 22612ca32b48STejun Heo destroy_workqueue(fcoe_wq); 22622e70e241SChris Leech 22632ca32b48STejun Heo /* 22642ca32b48STejun Heo * Detaching from the scsi transport must happen after all 22652ca32b48STejun Heo * destroys are done on the fcoe_wq. destroy_workqueue will 22662ca32b48STejun Heo * enusre the fcoe_wq is flushed. 22672ca32b48STejun Heo */ 22682e70e241SChris Leech fcoe_if_exit(); 226978a58246SYi Zou 227078a58246SYi Zou /* detach from fcoe transport */ 227178a58246SYi Zou fcoe_transport_detach(&fcoe_sw_transport); 2272a703e490SVasu Dev } 2273a703e490SVasu Dev module_exit(fcoe_exit); 227411b56188SChris Leech 227511b56188SChris Leech /** 227611b56188SChris Leech * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler 227711b56188SChris Leech * @seq: active sequence in the FLOGI or FDISC exchange 227811b56188SChris Leech * @fp: response frame, or error encoded in a pointer (timeout) 227911b56188SChris Leech * @arg: pointer the the fcoe_ctlr structure 228011b56188SChris Leech * 228165155b37SUwe Kleine-König * This handles MAC address management for FCoE, then passes control on to 228211b56188SChris Leech * the libfc FLOGI response handler. 228311b56188SChris Leech */ 228411b56188SChris Leech static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) 228511b56188SChris Leech { 228611b56188SChris Leech struct fcoe_ctlr *fip = arg; 228711b56188SChris Leech struct fc_exch *exch = fc_seq_exch(seq); 228811b56188SChris Leech struct fc_lport *lport = exch->lp; 228911b56188SChris Leech u8 *mac; 229011b56188SChris Leech 229111b56188SChris Leech if (IS_ERR(fp)) 229211b56188SChris Leech goto done; 229311b56188SChris Leech 229411b56188SChris Leech mac = fr_cb(fp)->granted_mac; 229511b56188SChris Leech if (is_zero_ether_addr(mac)) { 229611b56188SChris Leech /* pre-FIP */ 2297386309ceSJoe Eykholt if (fcoe_ctlr_recv_flogi(fip, lport, fp)) { 229811b56188SChris Leech fc_frame_free(fp); 229911b56188SChris Leech return; 230011b56188SChris Leech } 230111b56188SChris Leech } 2302386309ceSJoe Eykholt fcoe_update_src_mac(lport, mac); 230311b56188SChris Leech done: 230411b56188SChris Leech fc_lport_flogi_resp(seq, fp, lport); 230511b56188SChris Leech } 230611b56188SChris Leech 230711b56188SChris Leech /** 230811b56188SChris Leech * fcoe_logo_resp() - FCoE specific LOGO response handler 230911b56188SChris Leech * @seq: active sequence in the LOGO exchange 231011b56188SChris Leech * @fp: response frame, or error encoded in a pointer (timeout) 231111b56188SChris Leech * @arg: pointer the the fcoe_ctlr structure 231211b56188SChris Leech * 231365155b37SUwe Kleine-König * This handles MAC address management for FCoE, then passes control on to 231411b56188SChris Leech * the libfc LOGO response handler. 231511b56188SChris Leech */ 231611b56188SChris Leech static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) 231711b56188SChris Leech { 2318386309ceSJoe Eykholt struct fc_lport *lport = arg; 231911b56188SChris Leech static u8 zero_mac[ETH_ALEN] = { 0 }; 232011b56188SChris Leech 232111b56188SChris Leech if (!IS_ERR(fp)) 2322386309ceSJoe Eykholt fcoe_update_src_mac(lport, zero_mac); 232311b56188SChris Leech fc_lport_logo_resp(seq, fp, lport); 232411b56188SChris Leech } 232511b56188SChris Leech 232611b56188SChris Leech /** 232711b56188SChris Leech * fcoe_elsct_send - FCoE specific ELS handler 232811b56188SChris Leech * 232911b56188SChris Leech * This does special case handling of FIP encapsualted ELS exchanges for FCoE, 233011b56188SChris Leech * using FCoE specific response handlers and passing the FIP controller as 233111b56188SChris Leech * the argument (the lport is still available from the exchange). 233211b56188SChris Leech * 233311b56188SChris Leech * Most of the work here is just handed off to the libfc routine. 233411b56188SChris Leech */ 23351875f27eSRobert Love static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, 23361875f27eSRobert Love struct fc_frame *fp, unsigned int op, 23371875f27eSRobert Love void (*resp)(struct fc_seq *, 23381875f27eSRobert Love struct fc_frame *, 23391875f27eSRobert Love void *), 234011b56188SChris Leech void *arg, u32 timeout) 234111b56188SChris Leech { 234211b56188SChris Leech struct fcoe_port *port = lport_priv(lport); 23438597ae8bSBhanu Prakash Gollapudi struct fcoe_interface *fcoe = port->priv; 234411b56188SChris Leech struct fcoe_ctlr *fip = &fcoe->ctlr; 234511b56188SChris Leech struct fc_frame_header *fh = fc_frame_header_get(fp); 234611b56188SChris Leech 234711b56188SChris Leech switch (op) { 234811b56188SChris Leech case ELS_FLOGI: 234911b56188SChris Leech case ELS_FDISC: 2350e10f8c66SJoe Eykholt if (lport->point_to_multipoint) 2351e10f8c66SJoe Eykholt break; 235211b56188SChris Leech return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, 235311b56188SChris Leech fip, timeout); 235411b56188SChris Leech case ELS_LOGO: 235511b56188SChris Leech /* only hook onto fabric logouts, not port logouts */ 235611b56188SChris Leech if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) 235711b56188SChris Leech break; 235811b56188SChris Leech return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, 2359386309ceSJoe Eykholt lport, timeout); 236011b56188SChris Leech } 236111b56188SChris Leech return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); 236211b56188SChris Leech } 236311b56188SChris Leech 23649a05753bSChris Leech /** 23659a05753bSChris Leech * fcoe_vport_create() - create an fc_host/scsi_host for a vport 23669a05753bSChris Leech * @vport: fc_vport object to create a new fc_host for 23679a05753bSChris Leech * @disabled: start the new fc_host in a disabled state by default? 23689a05753bSChris Leech * 23699a05753bSChris Leech * Returns: 0 for success 23709a05753bSChris Leech */ 23719a05753bSChris Leech static int fcoe_vport_create(struct fc_vport *vport, bool disabled) 23729a05753bSChris Leech { 23739a05753bSChris Leech struct Scsi_Host *shost = vport_to_shost(vport); 23749a05753bSChris Leech struct fc_lport *n_port = shost_priv(shost); 23759a05753bSChris Leech struct fcoe_port *port = lport_priv(n_port); 23768597ae8bSBhanu Prakash Gollapudi struct fcoe_interface *fcoe = port->priv; 23779a05753bSChris Leech struct net_device *netdev = fcoe->netdev; 23789a05753bSChris Leech struct fc_lport *vn_port; 2379bdf25218SNeerav Parikh int rc; 2380bdf25218SNeerav Parikh char buf[32]; 2381bdf25218SNeerav Parikh 2382bdf25218SNeerav Parikh rc = fcoe_validate_vport_create(vport); 2383bdf25218SNeerav Parikh if (rc) { 2384bdf25218SNeerav Parikh wwn_to_str(vport->port_name, buf, sizeof(buf)); 2385bdf25218SNeerav Parikh printk(KERN_ERR "fcoe: Failed to create vport, " 2386bdf25218SNeerav Parikh "WWPN (0x%s) already exists\n", 2387bdf25218SNeerav Parikh buf); 2388bdf25218SNeerav Parikh return rc; 2389bdf25218SNeerav Parikh } 23909a05753bSChris Leech 23919a05753bSChris Leech mutex_lock(&fcoe_config_mutex); 23929a05753bSChris Leech vn_port = fcoe_if_create(fcoe, &vport->dev, 1); 23939a05753bSChris Leech mutex_unlock(&fcoe_config_mutex); 23949a05753bSChris Leech 23959a05753bSChris Leech if (IS_ERR(vn_port)) { 23969a05753bSChris Leech printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", 23979a05753bSChris Leech netdev->name); 23989a05753bSChris Leech return -EIO; 23999a05753bSChris Leech } 24009a05753bSChris Leech 24019a05753bSChris Leech if (disabled) { 24029a05753bSChris Leech fc_vport_set_state(vport, FC_VPORT_DISABLED); 24039a05753bSChris Leech } else { 24049a05753bSChris Leech vn_port->boot_time = jiffies; 24059a05753bSChris Leech fc_fabric_login(vn_port); 24069a05753bSChris Leech fc_vport_setlink(vn_port); 24079a05753bSChris Leech } 24089a05753bSChris Leech return 0; 24099a05753bSChris Leech } 24109a05753bSChris Leech 24119a05753bSChris Leech /** 24129a05753bSChris Leech * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport 24139a05753bSChris Leech * @vport: fc_vport object that is being destroyed 24149a05753bSChris Leech * 24159a05753bSChris Leech * Returns: 0 for success 24169a05753bSChris Leech */ 24179a05753bSChris Leech static int fcoe_vport_destroy(struct fc_vport *vport) 24189a05753bSChris Leech { 24199a05753bSChris Leech struct Scsi_Host *shost = vport_to_shost(vport); 24209a05753bSChris Leech struct fc_lport *n_port = shost_priv(shost); 24219a05753bSChris Leech struct fc_lport *vn_port = vport->dd_data; 24229a05753bSChris Leech struct fcoe_port *port = lport_priv(vn_port); 24239a05753bSChris Leech 24249a05753bSChris Leech mutex_lock(&n_port->lp_mutex); 24259a05753bSChris Leech list_del(&vn_port->list); 24269a05753bSChris Leech mutex_unlock(&n_port->lp_mutex); 24272ca32b48STejun Heo queue_work(fcoe_wq, &port->destroy_work); 24289a05753bSChris Leech return 0; 24299a05753bSChris Leech } 24309a05753bSChris Leech 24319a05753bSChris Leech /** 24329a05753bSChris Leech * fcoe_vport_disable() - change vport state 24339a05753bSChris Leech * @vport: vport to bring online/offline 24349a05753bSChris Leech * @disable: should the vport be disabled? 24359a05753bSChris Leech */ 24369a05753bSChris Leech static int fcoe_vport_disable(struct fc_vport *vport, bool disable) 24379a05753bSChris Leech { 24389a05753bSChris Leech struct fc_lport *lport = vport->dd_data; 24399a05753bSChris Leech 24409a05753bSChris Leech if (disable) { 24419a05753bSChris Leech fc_vport_set_state(vport, FC_VPORT_DISABLED); 24429a05753bSChris Leech fc_fabric_logoff(lport); 24439a05753bSChris Leech } else { 24449a05753bSChris Leech lport->boot_time = jiffies; 24459a05753bSChris Leech fc_fabric_login(lport); 24469a05753bSChris Leech fc_vport_setlink(lport); 24479a05753bSChris Leech } 24489a05753bSChris Leech 24499a05753bSChris Leech return 0; 24509a05753bSChris Leech } 24519a05753bSChris Leech 2452dc8596d3SChris Leech /** 2453dc8596d3SChris Leech * fcoe_vport_set_symbolic_name() - append vport string to symbolic name 2454dc8596d3SChris Leech * @vport: fc_vport with a new symbolic name string 2455dc8596d3SChris Leech * 2456dc8596d3SChris Leech * After generating a new symbolic name string, a new RSPN_ID request is 2457dc8596d3SChris Leech * sent to the name server. There is no response handler, so if it fails 2458dc8596d3SChris Leech * for some reason it will not be retried. 2459dc8596d3SChris Leech */ 2460dc8596d3SChris Leech static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) 2461dc8596d3SChris Leech { 2462dc8596d3SChris Leech struct fc_lport *lport = vport->dd_data; 2463dc8596d3SChris Leech struct fc_frame *fp; 2464dc8596d3SChris Leech size_t len; 2465dc8596d3SChris Leech 2466dc8596d3SChris Leech snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, 2467dc8596d3SChris Leech "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, 2468dc8596d3SChris Leech fcoe_netdev(lport)->name, vport->symbolic_name); 2469dc8596d3SChris Leech 2470dc8596d3SChris Leech if (lport->state != LPORT_ST_READY) 2471dc8596d3SChris Leech return; 2472dc8596d3SChris Leech 2473dc8596d3SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 2474dc8596d3SChris Leech fp = fc_frame_alloc(lport, 2475dc8596d3SChris Leech sizeof(struct fc_ct_hdr) + 2476dc8596d3SChris Leech sizeof(struct fc_ns_rspn) + len); 2477dc8596d3SChris Leech if (!fp) 2478dc8596d3SChris Leech return; 2479dc8596d3SChris Leech lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, 2480b94f8951SJoe Eykholt NULL, NULL, 3 * lport->r_a_tov); 2481dc8596d3SChris Leech } 2482b84056bfSYi Zou 2483b84056bfSYi Zou /** 2484b84056bfSYi Zou * fcoe_get_lesb() - Fill the FCoE Link Error Status Block 2485b84056bfSYi Zou * @lport: the local port 2486b84056bfSYi Zou * @fc_lesb: the link error status block 2487b84056bfSYi Zou */ 2488b84056bfSYi Zou static void fcoe_get_lesb(struct fc_lport *lport, 2489b84056bfSYi Zou struct fc_els_lesb *fc_lesb) 2490b84056bfSYi Zou { 2491b84056bfSYi Zou unsigned int cpu; 2492b84056bfSYi Zou u32 lfc, vlfc, mdac; 2493b84056bfSYi Zou struct fcoe_dev_stats *devst; 2494b84056bfSYi Zou struct fcoe_fc_els_lesb *lesb; 249528172739SEric Dumazet struct rtnl_link_stats64 temp; 2496b84056bfSYi Zou struct net_device *netdev = fcoe_netdev(lport); 2497b84056bfSYi Zou 2498b84056bfSYi Zou lfc = 0; 2499b84056bfSYi Zou vlfc = 0; 2500b84056bfSYi Zou mdac = 0; 2501b84056bfSYi Zou lesb = (struct fcoe_fc_els_lesb *)fc_lesb; 2502b84056bfSYi Zou memset(lesb, 0, sizeof(*lesb)); 2503b84056bfSYi Zou for_each_possible_cpu(cpu) { 2504b84056bfSYi Zou devst = per_cpu_ptr(lport->dev_stats, cpu); 2505b84056bfSYi Zou lfc += devst->LinkFailureCount; 2506b84056bfSYi Zou vlfc += devst->VLinkFailureCount; 2507b84056bfSYi Zou mdac += devst->MissDiscAdvCount; 2508b84056bfSYi Zou } 2509b84056bfSYi Zou lesb->lesb_link_fail = htonl(lfc); 2510b84056bfSYi Zou lesb->lesb_vlink_fail = htonl(vlfc); 2511b84056bfSYi Zou lesb->lesb_miss_fka = htonl(mdac); 251228172739SEric Dumazet lesb->lesb_fcs_error = htonl(dev_get_stats(netdev, &temp)->rx_crc_errors); 2513b84056bfSYi Zou } 25147d65b0dfSJoe Eykholt 25157d65b0dfSJoe Eykholt /** 25167d65b0dfSJoe Eykholt * fcoe_set_port_id() - Callback from libfc when Port_ID is set. 25177d65b0dfSJoe Eykholt * @lport: the local port 25187d65b0dfSJoe Eykholt * @port_id: the port ID 25197d65b0dfSJoe Eykholt * @fp: the received frame, if any, that caused the port_id to be set. 25207d65b0dfSJoe Eykholt * 25217d65b0dfSJoe Eykholt * This routine handles the case where we received a FLOGI and are 25227d65b0dfSJoe Eykholt * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi() 25237d65b0dfSJoe Eykholt * so it can set the non-mapped mode and gateway address. 25247d65b0dfSJoe Eykholt * 25257d65b0dfSJoe Eykholt * The FLOGI LS_ACC is handled by fcoe_flogi_resp(). 25267d65b0dfSJoe Eykholt */ 25277d65b0dfSJoe Eykholt static void fcoe_set_port_id(struct fc_lport *lport, 25287d65b0dfSJoe Eykholt u32 port_id, struct fc_frame *fp) 25297d65b0dfSJoe Eykholt { 25307d65b0dfSJoe Eykholt struct fcoe_port *port = lport_priv(lport); 25318597ae8bSBhanu Prakash Gollapudi struct fcoe_interface *fcoe = port->priv; 25327d65b0dfSJoe Eykholt 25337d65b0dfSJoe Eykholt if (fp && fc_frame_payload_op(fp) == ELS_FLOGI) 25347d65b0dfSJoe Eykholt fcoe_ctlr_recv_flogi(&fcoe->ctlr, lport, fp); 25357d65b0dfSJoe Eykholt } 2536bdf25218SNeerav Parikh 2537bdf25218SNeerav Parikh /** 2538bdf25218SNeerav Parikh * fcoe_validate_vport_create() - Validate a vport before creating it 2539bdf25218SNeerav Parikh * @vport: NPIV port to be created 2540bdf25218SNeerav Parikh * 2541bdf25218SNeerav Parikh * This routine is meant to add validation for a vport before creating it 2542bdf25218SNeerav Parikh * via fcoe_vport_create(). 2543bdf25218SNeerav Parikh * Current validations are: 2544bdf25218SNeerav Parikh * - WWPN supplied is unique for given lport 2545bdf25218SNeerav Parikh * 2546bdf25218SNeerav Parikh * 2547bdf25218SNeerav Parikh */ 2548bdf25218SNeerav Parikh static int fcoe_validate_vport_create(struct fc_vport *vport) 2549bdf25218SNeerav Parikh { 2550bdf25218SNeerav Parikh struct Scsi_Host *shost = vport_to_shost(vport); 2551bdf25218SNeerav Parikh struct fc_lport *n_port = shost_priv(shost); 2552bdf25218SNeerav Parikh struct fc_lport *vn_port; 2553bdf25218SNeerav Parikh int rc = 0; 2554bdf25218SNeerav Parikh char buf[32]; 2555bdf25218SNeerav Parikh 2556bdf25218SNeerav Parikh mutex_lock(&n_port->lp_mutex); 2557bdf25218SNeerav Parikh 2558bdf25218SNeerav Parikh wwn_to_str(vport->port_name, buf, sizeof(buf)); 2559bdf25218SNeerav Parikh /* Check if the wwpn is not same as that of the lport */ 2560bdf25218SNeerav Parikh if (!memcmp(&n_port->wwpn, &vport->port_name, sizeof(u64))) { 2561bdf25218SNeerav Parikh FCOE_DBG("vport WWPN 0x%s is same as that of the " 2562bdf25218SNeerav Parikh "base port WWPN\n", buf); 2563bdf25218SNeerav Parikh rc = -EINVAL; 2564bdf25218SNeerav Parikh goto out; 2565bdf25218SNeerav Parikh } 2566bdf25218SNeerav Parikh 2567bdf25218SNeerav Parikh /* Check if there is any existing vport with same wwpn */ 2568bdf25218SNeerav Parikh list_for_each_entry(vn_port, &n_port->vports, list) { 2569bdf25218SNeerav Parikh if (!memcmp(&vn_port->wwpn, &vport->port_name, sizeof(u64))) { 2570bdf25218SNeerav Parikh FCOE_DBG("vport with given WWPN 0x%s already " 2571bdf25218SNeerav Parikh "exists\n", buf); 2572bdf25218SNeerav Parikh rc = -EINVAL; 2573bdf25218SNeerav Parikh break; 2574bdf25218SNeerav Parikh } 2575bdf25218SNeerav Parikh } 2576bdf25218SNeerav Parikh 2577bdf25218SNeerav Parikh out: 2578bdf25218SNeerav Parikh mutex_unlock(&n_port->lp_mutex); 2579bdf25218SNeerav Parikh 2580bdf25218SNeerav Parikh return rc; 2581bdf25218SNeerav Parikh } 2582