2008-12-10 07:10:24 +08:00
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/*
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* Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Maintained at www.Open-FCoE.org
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*/
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#include <linux/module.h>
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#include <linux/version.h>
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#include <linux/spinlock.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include <linux/if_ether.h>
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#include <linux/if_vlan.h>
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#include <linux/crc32.h>
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#include <linux/cpu.h>
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#include <linux/fs.h>
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#include <linux/sysfs.h>
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#include <linux/ctype.h>
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#include <scsi/scsi_tcq.h>
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#include <scsi/scsicam.h>
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#include <scsi/scsi_transport.h>
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#include <scsi/scsi_transport_fc.h>
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#include <net/rtnetlink.h>
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#include <scsi/fc/fc_encaps.h>
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2009-03-18 02:42:40 +08:00
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#include <scsi/fc/fc_fip.h>
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2008-12-10 07:10:24 +08:00
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#include <scsi/libfc.h>
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#include <scsi/fc_frame.h>
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#include <scsi/libfcoe.h>
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2009-03-18 02:42:24 +08:00
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#include "fcoe.h"
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2009-03-28 00:06:31 +08:00
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2008-12-10 07:10:24 +08:00
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MODULE_AUTHOR("Open-FCoE.org");
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MODULE_DESCRIPTION("FCoE");
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2009-03-18 02:42:13 +08:00
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MODULE_LICENSE("GPL v2");
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2008-12-10 07:10:24 +08:00
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/* fcoe host list */
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LIST_HEAD(fcoe_hostlist);
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DEFINE_RWLOCK(fcoe_hostlist_lock);
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2009-03-18 02:41:35 +08:00
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DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
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2008-12-10 07:10:24 +08:00
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2009-04-22 07:27:36 +08:00
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/* Function Prototypes */
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2009-03-18 02:42:24 +08:00
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static int fcoe_reset(struct Scsi_Host *shost);
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static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
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static int fcoe_rcv(struct sk_buff *, struct net_device *,
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struct packet_type *, struct net_device *);
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static int fcoe_percpu_receive_thread(void *arg);
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static void fcoe_clean_pending_queue(struct fc_lport *lp);
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static void fcoe_percpu_clean(struct fc_lport *lp);
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static int fcoe_link_ok(struct fc_lport *lp);
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static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
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static int fcoe_hostlist_add(const struct fc_lport *);
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static int fcoe_hostlist_remove(const struct fc_lport *);
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2009-05-07 01:52:34 +08:00
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static void fcoe_check_wait_queue(struct fc_lport *, struct sk_buff *);
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2008-12-10 07:10:24 +08:00
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static int fcoe_device_notification(struct notifier_block *, ulong, void *);
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static void fcoe_dev_setup(void);
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static void fcoe_dev_cleanup(void);
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/* notification function from net device */
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static struct notifier_block fcoe_notifier = {
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.notifier_call = fcoe_device_notification,
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};
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2009-03-28 00:06:31 +08:00
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static struct scsi_transport_template *scsi_transport_fcoe_sw;
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struct fc_function_template fcoe_transport_function = {
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.show_host_node_name = 1,
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.show_host_port_name = 1,
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.show_host_supported_classes = 1,
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.show_host_supported_fc4s = 1,
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.show_host_active_fc4s = 1,
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.show_host_maxframe_size = 1,
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.show_host_port_id = 1,
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.show_host_supported_speeds = 1,
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.get_host_speed = fc_get_host_speed,
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.show_host_speed = 1,
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.show_host_port_type = 1,
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.get_host_port_state = fc_get_host_port_state,
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.show_host_port_state = 1,
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.show_host_symbolic_name = 1,
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.dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
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.show_rport_maxframe_size = 1,
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.show_rport_supported_classes = 1,
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.show_host_fabric_name = 1,
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.show_starget_node_name = 1,
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.show_starget_port_name = 1,
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.show_starget_port_id = 1,
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.set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
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.show_rport_dev_loss_tmo = 1,
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.get_fc_host_stats = fc_get_host_stats,
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.issue_fc_host_lip = fcoe_reset,
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.terminate_rport_io = fc_rport_terminate_io,
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};
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static struct scsi_host_template fcoe_shost_template = {
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.module = THIS_MODULE,
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.name = "FCoE Driver",
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.proc_name = FCOE_NAME,
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.queuecommand = fc_queuecommand,
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.eh_abort_handler = fc_eh_abort,
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.eh_device_reset_handler = fc_eh_device_reset,
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.eh_host_reset_handler = fc_eh_host_reset,
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.slave_alloc = fc_slave_alloc,
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.change_queue_depth = fc_change_queue_depth,
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.change_queue_type = fc_change_queue_type,
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.this_id = -1,
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.cmd_per_lun = 32,
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.can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
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.use_clustering = ENABLE_CLUSTERING,
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.sg_tablesize = SG_ALL,
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.max_sectors = 0xffff,
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};
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2009-05-17 20:33:08 +08:00
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/**
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* fcoe_fip_recv - handle a received FIP frame.
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* @skb: the receive skb
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* @dev: associated &net_device
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* @ptype: the &packet_type structure which was used to register this handler.
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* @orig_dev: original receive &net_device, in case @dev is a bond.
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*
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* Returns: 0 for success
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*/
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static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *dev,
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struct packet_type *ptype,
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struct net_device *orig_dev)
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{
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struct fcoe_softc *fc;
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fc = container_of(ptype, struct fcoe_softc, fip_packet_type);
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fcoe_ctlr_recv(&fc->ctlr, skb);
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return 0;
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}
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/**
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* fcoe_fip_send() - send an Ethernet-encapsulated FIP frame.
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* @fip: FCoE controller.
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* @skb: FIP Packet.
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*/
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static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
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{
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skb->dev = fcoe_from_ctlr(fip)->real_dev;
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dev_queue_xmit(skb);
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}
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/**
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* fcoe_update_src_mac() - Update Ethernet MAC filters.
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* @fip: FCoE controller.
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* @old: Unicast MAC address to delete if the MAC is non-zero.
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* @new: Unicast MAC address to add.
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*
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* Remove any previously-set unicast MAC filter.
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* Add secondary FCoE MAC address filter for our OUI.
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*/
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static void fcoe_update_src_mac(struct fcoe_ctlr *fip, u8 *old, u8 *new)
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{
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struct fcoe_softc *fc;
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fc = fcoe_from_ctlr(fip);
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rtnl_lock();
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if (!is_zero_ether_addr(old))
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2009-05-23 07:22:17 +08:00
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dev_unicast_delete(fc->real_dev, old);
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dev_unicast_add(fc->real_dev, new);
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2009-05-17 20:33:08 +08:00
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rtnl_unlock();
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}
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2009-03-28 00:06:31 +08:00
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/**
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* fcoe_lport_config() - sets up the fc_lport
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* @lp: ptr to the fc_lport
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*
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* Returns: 0 for success
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*/
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static int fcoe_lport_config(struct fc_lport *lp)
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{
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lp->link_up = 0;
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lp->qfull = 0;
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lp->max_retry_count = 3;
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2009-05-02 01:01:26 +08:00
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lp->max_rport_retry_count = 3;
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2009-03-28 00:06:31 +08:00
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lp->e_d_tov = 2 * 1000; /* FC-FS default */
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lp->r_a_tov = 2 * 2 * 1000;
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lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
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FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
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fc_lport_init_stats(lp);
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/* lport fc_lport related configuration */
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fc_lport_config(lp);
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/* offload related configuration */
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lp->crc_offload = 0;
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lp->seq_offload = 0;
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lp->lro_enabled = 0;
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lp->lro_xid = 0;
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lp->lso_max = 0;
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return 0;
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}
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2009-05-17 20:33:08 +08:00
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/**
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* fcoe_netdev_cleanup() - clean up netdev configurations
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* @fc: ptr to the fcoe_softc
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*/
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void fcoe_netdev_cleanup(struct fcoe_softc *fc)
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{
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u8 flogi_maddr[ETH_ALEN];
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/* Don't listen for Ethernet packets anymore */
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dev_remove_pack(&fc->fcoe_packet_type);
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dev_remove_pack(&fc->fip_packet_type);
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/* Delete secondary MAC addresses */
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rtnl_lock();
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memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
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2009-05-23 07:22:17 +08:00
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dev_unicast_delete(fc->real_dev, flogi_maddr);
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2009-05-17 20:33:08 +08:00
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if (!is_zero_ether_addr(fc->ctlr.data_src_addr))
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2009-05-23 07:22:17 +08:00
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dev_unicast_delete(fc->real_dev, fc->ctlr.data_src_addr);
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2009-05-17 20:33:28 +08:00
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if (fc->ctlr.spma)
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2009-05-23 07:22:17 +08:00
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dev_unicast_delete(fc->real_dev, fc->ctlr.ctl_src_addr);
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2009-05-17 20:33:08 +08:00
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dev_mc_delete(fc->real_dev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
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rtnl_unlock();
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}
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2009-05-07 01:52:40 +08:00
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/**
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* fcoe_queue_timer() - fcoe queue timer
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* @lp: the fc_lport pointer
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*
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* Calls fcoe_check_wait_queue on timeout
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*
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*/
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static void fcoe_queue_timer(ulong lp)
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{
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fcoe_check_wait_queue((struct fc_lport *)lp, NULL);
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}
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2009-03-28 00:06:31 +08:00
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/**
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* fcoe_netdev_config() - Set up netdev for SW FCoE
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* @lp : ptr to the fc_lport
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* @netdev : ptr to the associated netdevice struct
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*
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* Must be called after fcoe_lport_config() as it will use lport mutex
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*
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* Returns : 0 for success
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*/
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static int fcoe_netdev_config(struct fc_lport *lp, struct net_device *netdev)
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{
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u32 mfs;
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u64 wwnn, wwpn;
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struct fcoe_softc *fc;
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u8 flogi_maddr[ETH_ALEN];
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2009-05-17 20:33:28 +08:00
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struct netdev_hw_addr *ha;
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2009-03-28 00:06:31 +08:00
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/* Setup lport private data to point to fcoe softc */
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fc = lport_priv(lp);
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2009-03-18 02:42:40 +08:00
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fc->ctlr.lp = lp;
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2009-03-28 00:06:31 +08:00
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fc->real_dev = netdev;
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fc->phys_dev = netdev;
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/* Require support for get_pauseparam ethtool op. */
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if (netdev->priv_flags & IFF_802_1Q_VLAN)
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fc->phys_dev = vlan_dev_real_dev(netdev);
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/* Do not support for bonding device */
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if ((fc->real_dev->priv_flags & IFF_MASTER_ALB) ||
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(fc->real_dev->priv_flags & IFF_SLAVE_INACTIVE) ||
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(fc->real_dev->priv_flags & IFF_MASTER_8023AD)) {
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return -EOPNOTSUPP;
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}
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/*
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* Determine max frame size based on underlying device and optional
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* user-configured limit. If the MFS is too low, fcoe_link_ok()
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* will return 0, so do this first.
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*/
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mfs = fc->real_dev->mtu - (sizeof(struct fcoe_hdr) +
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sizeof(struct fcoe_crc_eof));
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if (fc_set_mfs(lp, mfs))
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return -EINVAL;
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/* offload features support */
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if (fc->real_dev->features & NETIF_F_SG)
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lp->sg_supp = 1;
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#ifdef NETIF_F_FCOE_CRC
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if (netdev->features & NETIF_F_FCOE_CRC) {
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lp->crc_offload = 1;
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2009-06-11 06:30:59 +08:00
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FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
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2009-03-28 00:06:31 +08:00
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}
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#endif
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#ifdef NETIF_F_FSO
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if (netdev->features & NETIF_F_FSO) {
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lp->seq_offload = 1;
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lp->lso_max = netdev->gso_max_size;
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2009-06-11 06:30:59 +08:00
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FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
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lp->lso_max);
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2009-03-28 00:06:31 +08:00
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}
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#endif
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if (netdev->fcoe_ddp_xid) {
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lp->lro_enabled = 1;
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|
|
lp->lro_xid = netdev->fcoe_ddp_xid;
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
|
|
|
|
lp->lro_xid);
|
2009-03-28 00:06:31 +08:00
|
|
|
}
|
|
|
|
skb_queue_head_init(&fc->fcoe_pending_queue);
|
|
|
|
fc->fcoe_pending_queue_active = 0;
|
2009-05-07 01:52:40 +08:00
|
|
|
setup_timer(&fc->timer, fcoe_queue_timer, (unsigned long)lp);
|
2009-03-28 00:06:31 +08:00
|
|
|
|
2009-05-17 20:33:28 +08:00
|
|
|
/* look for SAN MAC address, if multiple SAN MACs exist, only
|
|
|
|
* use the first one for SPMA */
|
|
|
|
rcu_read_lock();
|
|
|
|
for_each_dev_addr(netdev, ha) {
|
|
|
|
if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
|
2009-07-30 08:03:50 +08:00
|
|
|
(is_valid_ether_addr(ha->addr))) {
|
2009-05-17 20:33:28 +08:00
|
|
|
memcpy(fc->ctlr.ctl_src_addr, ha->addr, ETH_ALEN);
|
|
|
|
fc->ctlr.spma = 1;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
|
|
|
2009-03-28 00:06:31 +08:00
|
|
|
/* setup Source Mac Address */
|
2009-05-17 20:33:28 +08:00
|
|
|
if (!fc->ctlr.spma)
|
|
|
|
memcpy(fc->ctlr.ctl_src_addr, fc->real_dev->dev_addr,
|
|
|
|
fc->real_dev->addr_len);
|
2009-03-28 00:06:31 +08:00
|
|
|
|
|
|
|
wwnn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 1, 0);
|
|
|
|
fc_set_wwnn(lp, wwnn);
|
|
|
|
/* XXX - 3rd arg needs to be vlan id */
|
|
|
|
wwpn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 2, 0);
|
|
|
|
fc_set_wwpn(lp, wwpn);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Add FCoE MAC address as second unicast MAC address
|
|
|
|
* or enter promiscuous mode if not capable of listening
|
|
|
|
* for multiple unicast MACs.
|
|
|
|
*/
|
|
|
|
rtnl_lock();
|
|
|
|
memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
|
2009-05-23 07:22:17 +08:00
|
|
|
dev_unicast_add(fc->real_dev, flogi_maddr);
|
2009-05-17 20:33:28 +08:00
|
|
|
if (fc->ctlr.spma)
|
2009-05-23 07:22:17 +08:00
|
|
|
dev_unicast_add(fc->real_dev, fc->ctlr.ctl_src_addr);
|
2009-04-22 07:27:46 +08:00
|
|
|
dev_mc_add(fc->real_dev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
|
2009-03-28 00:06:31 +08:00
|
|
|
rtnl_unlock();
|
|
|
|
|
|
|
|
/*
|
|
|
|
* setup the receive function from ethernet driver
|
|
|
|
* on the ethertype for the given device
|
|
|
|
*/
|
|
|
|
fc->fcoe_packet_type.func = fcoe_rcv;
|
|
|
|
fc->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
|
|
|
|
fc->fcoe_packet_type.dev = fc->real_dev;
|
|
|
|
dev_add_pack(&fc->fcoe_packet_type);
|
|
|
|
|
2009-05-17 20:33:08 +08:00
|
|
|
fc->fip_packet_type.func = fcoe_fip_recv;
|
|
|
|
fc->fip_packet_type.type = htons(ETH_P_FIP);
|
|
|
|
fc->fip_packet_type.dev = fc->real_dev;
|
|
|
|
dev_add_pack(&fc->fip_packet_type);
|
|
|
|
|
2009-03-28 00:06:31 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* fcoe_shost_config() - Sets up fc_lport->host
|
|
|
|
* @lp : ptr to the fc_lport
|
|
|
|
* @shost : ptr to the associated scsi host
|
|
|
|
* @dev : device associated to scsi host
|
|
|
|
*
|
|
|
|
* Must be called after fcoe_lport_config() and fcoe_netdev_config()
|
|
|
|
*
|
|
|
|
* Returns : 0 for success
|
|
|
|
*/
|
|
|
|
static int fcoe_shost_config(struct fc_lport *lp, struct Scsi_Host *shost,
|
|
|
|
struct device *dev)
|
|
|
|
{
|
|
|
|
int rc = 0;
|
|
|
|
|
|
|
|
/* lport scsi host config */
|
|
|
|
lp->host = shost;
|
|
|
|
|
|
|
|
lp->host->max_lun = FCOE_MAX_LUN;
|
|
|
|
lp->host->max_id = FCOE_MAX_FCP_TARGET;
|
|
|
|
lp->host->max_channel = 0;
|
|
|
|
lp->host->transportt = scsi_transport_fcoe_sw;
|
|
|
|
|
|
|
|
/* add the new host to the SCSI-ml */
|
|
|
|
rc = scsi_add_host(lp->host, dev);
|
|
|
|
if (rc) {
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_NETDEV_DBG(fcoe_netdev(lp), "fcoe_shost_config: "
|
|
|
|
"error on scsi_add_host\n");
|
2009-03-28 00:06:31 +08:00
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
sprintf(fc_host_symbolic_name(lp->host), "%s v%s over %s",
|
|
|
|
FCOE_NAME, FCOE_VERSION,
|
|
|
|
fcoe_netdev(lp)->name);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* fcoe_em_config() - allocates em for this lport
|
|
|
|
* @lp: the port that em is to allocated for
|
|
|
|
*
|
|
|
|
* Returns : 0 on success
|
|
|
|
*/
|
|
|
|
static inline int fcoe_em_config(struct fc_lport *lp)
|
|
|
|
{
|
|
|
|
BUG_ON(lp->emp);
|
|
|
|
|
|
|
|
lp->emp = fc_exch_mgr_alloc(lp, FC_CLASS_3,
|
|
|
|
FCOE_MIN_XID, FCOE_MAX_XID);
|
|
|
|
if (!lp->emp)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* fcoe_if_destroy() - FCoE software HBA tear-down function
|
|
|
|
* @netdev: ptr to the associated net_device
|
|
|
|
*
|
|
|
|
* Returns: 0 if link is OK for use by FCoE.
|
|
|
|
*/
|
|
|
|
static int fcoe_if_destroy(struct net_device *netdev)
|
|
|
|
{
|
|
|
|
struct fc_lport *lp = NULL;
|
|
|
|
struct fcoe_softc *fc;
|
|
|
|
|
|
|
|
BUG_ON(!netdev);
|
|
|
|
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
|
2009-03-28 00:06:31 +08:00
|
|
|
|
|
|
|
lp = fcoe_hostlist_lookup(netdev);
|
|
|
|
if (!lp)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
fc = lport_priv(lp);
|
|
|
|
|
|
|
|
/* Logout of the fabric */
|
|
|
|
fc_fabric_logoff(lp);
|
|
|
|
|
|
|
|
/* Remove the instance from fcoe's list */
|
|
|
|
fcoe_hostlist_remove(lp);
|
|
|
|
|
2009-05-17 20:33:08 +08:00
|
|
|
/* clean up netdev configurations */
|
|
|
|
fcoe_netdev_cleanup(fc);
|
|
|
|
|
|
|
|
/* tear-down the FCoE controller */
|
2009-03-18 02:42:40 +08:00
|
|
|
fcoe_ctlr_destroy(&fc->ctlr);
|
2009-03-28 00:06:31 +08:00
|
|
|
|
|
|
|
/* Cleanup the fc_lport */
|
|
|
|
fc_lport_destroy(lp);
|
|
|
|
fc_fcp_destroy(lp);
|
|
|
|
|
|
|
|
/* Detach from the scsi-ml */
|
|
|
|
fc_remove_host(lp->host);
|
|
|
|
scsi_remove_host(lp->host);
|
|
|
|
|
|
|
|
/* There are no more rports or I/O, free the EM */
|
|
|
|
if (lp->emp)
|
|
|
|
fc_exch_mgr_free(lp->emp);
|
|
|
|
|
2009-04-22 07:27:36 +08:00
|
|
|
/* Free the per-CPU receive threads */
|
2009-03-28 00:06:31 +08:00
|
|
|
fcoe_percpu_clean(lp);
|
|
|
|
|
|
|
|
/* Free existing skbs */
|
|
|
|
fcoe_clean_pending_queue(lp);
|
|
|
|
|
2009-05-07 01:52:40 +08:00
|
|
|
/* Stop the timer */
|
|
|
|
del_timer_sync(&fc->timer);
|
|
|
|
|
2009-03-28 00:06:31 +08:00
|
|
|
/* Free memory used by statistical counters */
|
|
|
|
fc_lport_free_stats(lp);
|
|
|
|
|
|
|
|
/* Release the net_device and Scsi_Host */
|
|
|
|
dev_put(fc->real_dev);
|
|
|
|
scsi_host_put(lp->host);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* fcoe_ddp_setup - calls LLD's ddp_setup through net_device
|
|
|
|
* @lp: the corresponding fc_lport
|
|
|
|
* @xid: the exchange id for this ddp transfer
|
|
|
|
* @sgl: the scatterlist describing this transfer
|
|
|
|
* @sgc: number of sg items
|
|
|
|
*
|
|
|
|
* Returns : 0 no ddp
|
|
|
|
*/
|
|
|
|
static int fcoe_ddp_setup(struct fc_lport *lp, u16 xid,
|
|
|
|
struct scatterlist *sgl, unsigned int sgc)
|
|
|
|
{
|
|
|
|
struct net_device *n = fcoe_netdev(lp);
|
|
|
|
|
|
|
|
if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_setup)
|
|
|
|
return n->netdev_ops->ndo_fcoe_ddp_setup(n, xid, sgl, sgc);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* fcoe_ddp_done - calls LLD's ddp_done through net_device
|
|
|
|
* @lp: the corresponding fc_lport
|
|
|
|
* @xid: the exchange id for this ddp transfer
|
|
|
|
*
|
|
|
|
* Returns : the length of data that have been completed by ddp
|
|
|
|
*/
|
|
|
|
static int fcoe_ddp_done(struct fc_lport *lp, u16 xid)
|
|
|
|
{
|
|
|
|
struct net_device *n = fcoe_netdev(lp);
|
|
|
|
|
|
|
|
if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_done)
|
|
|
|
return n->netdev_ops->ndo_fcoe_ddp_done(n, xid);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct libfc_function_template fcoe_libfc_fcn_templ = {
|
|
|
|
.frame_send = fcoe_xmit,
|
|
|
|
.ddp_setup = fcoe_ddp_setup,
|
|
|
|
.ddp_done = fcoe_ddp_done,
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* fcoe_if_create() - this function creates the fcoe interface
|
|
|
|
* @netdev: pointer the associated netdevice
|
|
|
|
*
|
|
|
|
* Creates fc_lport struct and scsi_host for lport, configures lport
|
|
|
|
* and starts fabric login.
|
|
|
|
*
|
|
|
|
* Returns : 0 on success
|
|
|
|
*/
|
|
|
|
static int fcoe_if_create(struct net_device *netdev)
|
|
|
|
{
|
|
|
|
int rc;
|
|
|
|
struct fc_lport *lp = NULL;
|
|
|
|
struct fcoe_softc *fc;
|
|
|
|
struct Scsi_Host *shost;
|
|
|
|
|
|
|
|
BUG_ON(!netdev);
|
|
|
|
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_NETDEV_DBG(netdev, "Create Interface\n");
|
2009-03-28 00:06:31 +08:00
|
|
|
|
|
|
|
lp = fcoe_hostlist_lookup(netdev);
|
|
|
|
if (lp)
|
|
|
|
return -EEXIST;
|
|
|
|
|
2009-03-18 02:42:29 +08:00
|
|
|
shost = libfc_host_alloc(&fcoe_shost_template,
|
|
|
|
sizeof(struct fcoe_softc));
|
2009-03-28 00:06:31 +08:00
|
|
|
if (!shost) {
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
|
2009-03-28 00:06:31 +08:00
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
lp = shost_priv(shost);
|
|
|
|
fc = lport_priv(lp);
|
|
|
|
|
|
|
|
/* configure fc_lport, e.g., em */
|
|
|
|
rc = fcoe_lport_config(lp);
|
|
|
|
if (rc) {
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
|
|
|
|
"interface\n");
|
2009-03-28 00:06:31 +08:00
|
|
|
goto out_host_put;
|
|
|
|
}
|
|
|
|
|
2009-03-18 02:42:40 +08:00
|
|
|
/*
|
|
|
|
* Initialize FIP.
|
|
|
|
*/
|
|
|
|
fcoe_ctlr_init(&fc->ctlr);
|
|
|
|
fc->ctlr.send = fcoe_fip_send;
|
|
|
|
fc->ctlr.update_mac = fcoe_update_src_mac;
|
|
|
|
|
2009-05-17 20:33:08 +08:00
|
|
|
/* configure lport network properties */
|
|
|
|
rc = fcoe_netdev_config(lp, netdev);
|
|
|
|
if (rc) {
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
|
|
|
|
"interface\n");
|
2009-05-17 20:33:08 +08:00
|
|
|
goto out_netdev_cleanup;
|
|
|
|
}
|
2009-03-18 02:42:40 +08:00
|
|
|
|
2009-03-28 00:06:31 +08:00
|
|
|
/* configure lport scsi host properties */
|
|
|
|
rc = fcoe_shost_config(lp, shost, &netdev->dev);
|
|
|
|
if (rc) {
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
|
|
|
|
"interface\n");
|
2009-05-17 20:33:08 +08:00
|
|
|
goto out_netdev_cleanup;
|
2009-03-28 00:06:31 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* lport exch manager allocation */
|
|
|
|
rc = fcoe_em_config(lp);
|
|
|
|
if (rc) {
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_NETDEV_DBG(netdev, "Could not configure the EM for the "
|
|
|
|
"interface\n");
|
2009-05-17 20:33:08 +08:00
|
|
|
goto out_netdev_cleanup;
|
2009-03-28 00:06:31 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Initialize the library */
|
|
|
|
rc = fcoe_libfc_config(lp, &fcoe_libfc_fcn_templ);
|
|
|
|
if (rc) {
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
|
|
|
|
"interface\n");
|
2009-03-28 00:06:31 +08:00
|
|
|
goto out_lp_destroy;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* add to lports list */
|
|
|
|
fcoe_hostlist_add(lp);
|
|
|
|
|
|
|
|
lp->boot_time = jiffies;
|
|
|
|
|
|
|
|
fc_fabric_login(lp);
|
|
|
|
|
2009-03-18 02:42:40 +08:00
|
|
|
if (!fcoe_link_ok(lp))
|
|
|
|
fcoe_ctlr_link_up(&fc->ctlr);
|
|
|
|
|
2009-03-28 00:06:31 +08:00
|
|
|
dev_hold(netdev);
|
|
|
|
|
|
|
|
return rc;
|
|
|
|
|
|
|
|
out_lp_destroy:
|
|
|
|
fc_exch_mgr_free(lp->emp); /* Free the EM */
|
2009-05-17 20:33:08 +08:00
|
|
|
out_netdev_cleanup:
|
|
|
|
fcoe_netdev_cleanup(fc);
|
2009-03-28 00:06:31 +08:00
|
|
|
out_host_put:
|
|
|
|
scsi_host_put(lp->host);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* fcoe_if_init() - attach to scsi transport
|
|
|
|
*
|
|
|
|
* Returns : 0 on success
|
|
|
|
*/
|
|
|
|
static int __init fcoe_if_init(void)
|
|
|
|
{
|
|
|
|
/* attach to scsi transport */
|
|
|
|
scsi_transport_fcoe_sw =
|
|
|
|
fc_attach_transport(&fcoe_transport_function);
|
|
|
|
|
|
|
|
if (!scsi_transport_fcoe_sw) {
|
2009-06-11 06:30:59 +08:00
|
|
|
printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
|
2009-03-28 00:06:31 +08:00
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* fcoe_if_exit() - detach from scsi transport
|
|
|
|
*
|
|
|
|
* Returns : 0 on success
|
|
|
|
*/
|
|
|
|
int __exit fcoe_if_exit(void)
|
|
|
|
{
|
|
|
|
fc_release_transport(scsi_transport_fcoe_sw);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-03-18 02:41:46 +08:00
|
|
|
/**
|
|
|
|
* fcoe_percpu_thread_create() - Create a receive thread for an online cpu
|
|
|
|
* @cpu: cpu index for the online cpu
|
|
|
|
*/
|
|
|
|
static void fcoe_percpu_thread_create(unsigned int cpu)
|
|
|
|
{
|
|
|
|
struct fcoe_percpu_s *p;
|
|
|
|
struct task_struct *thread;
|
|
|
|
|
|
|
|
p = &per_cpu(fcoe_percpu, cpu);
|
|
|
|
|
|
|
|
thread = kthread_create(fcoe_percpu_receive_thread,
|
|
|
|
(void *)p, "fcoethread/%d", cpu);
|
|
|
|
|
|
|
|
if (likely(!IS_ERR(p->thread))) {
|
|
|
|
kthread_bind(thread, cpu);
|
|
|
|
wake_up_process(thread);
|
|
|
|
|
|
|
|
spin_lock_bh(&p->fcoe_rx_list.lock);
|
|
|
|
p->thread = thread;
|
|
|
|
spin_unlock_bh(&p->fcoe_rx_list.lock);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* fcoe_percpu_thread_destroy() - removes the rx thread for the given cpu
|
|
|
|
* @cpu: cpu index the rx thread is to be removed
|
|
|
|
*
|
|
|
|
* Destroys a per-CPU Rx thread. Any pending skbs are moved to the
|
|
|
|
* current CPU's Rx thread. If the thread being destroyed is bound to
|
|
|
|
* the CPU processing this context the skbs will be freed.
|
|
|
|
*/
|
|
|
|
static void fcoe_percpu_thread_destroy(unsigned int cpu)
|
|
|
|
{
|
|
|
|
struct fcoe_percpu_s *p;
|
|
|
|
struct task_struct *thread;
|
|
|
|
struct page *crc_eof;
|
|
|
|
struct sk_buff *skb;
|
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
struct fcoe_percpu_s *p0;
|
|
|
|
unsigned targ_cpu = smp_processor_id();
|
|
|
|
#endif /* CONFIG_SMP */
|
|
|
|
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
|
2009-03-18 02:41:46 +08:00
|
|
|
|
|
|
|
/* Prevent any new skbs from being queued for this CPU. */
|
|
|
|
p = &per_cpu(fcoe_percpu, cpu);
|
|
|
|
spin_lock_bh(&p->fcoe_rx_list.lock);
|
|
|
|
thread = p->thread;
|
|
|
|
p->thread = NULL;
|
|
|
|
crc_eof = p->crc_eof_page;
|
|
|
|
p->crc_eof_page = NULL;
|
|
|
|
p->crc_eof_offset = 0;
|
|
|
|
spin_unlock_bh(&p->fcoe_rx_list.lock);
|
|
|
|
|
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
/*
|
|
|
|
* Don't bother moving the skb's if this context is running
|
|
|
|
* on the same CPU that is having its thread destroyed. This
|
|
|
|
* can easily happen when the module is removed.
|
|
|
|
*/
|
|
|
|
if (cpu != targ_cpu) {
|
|
|
|
p0 = &per_cpu(fcoe_percpu, targ_cpu);
|
|
|
|
spin_lock_bh(&p0->fcoe_rx_list.lock);
|
|
|
|
if (p0->thread) {
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
|
|
|
|
cpu, targ_cpu);
|
2009-03-18 02:41:46 +08:00
|
|
|
|
|
|
|
while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
|
|
|
|
__skb_queue_tail(&p0->fcoe_rx_list, skb);
|
|
|
|
spin_unlock_bh(&p0->fcoe_rx_list.lock);
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* The targeted CPU is not initialized and cannot accept
|
|
|
|
* new skbs. Unlock the targeted CPU and drop the skbs
|
|
|
|
* on the CPU that is going offline.
|
|
|
|
*/
|
|
|
|
while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
|
|
|
|
kfree_skb(skb);
|
|
|
|
spin_unlock_bh(&p0->fcoe_rx_list.lock);
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* This scenario occurs when the module is being removed
|
|
|
|
* and all threads are being destroyed. skbs will continue
|
|
|
|
* to be shifted from the CPU thread that is being removed
|
|
|
|
* to the CPU thread associated with the CPU that is processing
|
|
|
|
* the module removal. Once there is only one CPU Rx thread it
|
|
|
|
* will reach this case and we will drop all skbs and later
|
|
|
|
* stop the thread.
|
|
|
|
*/
|
|
|
|
spin_lock_bh(&p->fcoe_rx_list.lock);
|
|
|
|
while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
|
|
|
|
kfree_skb(skb);
|
|
|
|
spin_unlock_bh(&p->fcoe_rx_list.lock);
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
/*
|
2009-04-22 07:27:36 +08:00
|
|
|
* This a non-SMP scenario where the singular Rx thread is
|
2009-03-18 02:41:46 +08:00
|
|
|
* being removed. Free all skbs and stop the thread.
|
|
|
|
*/
|
|
|
|
spin_lock_bh(&p->fcoe_rx_list.lock);
|
|
|
|
while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
|
|
|
|
kfree_skb(skb);
|
|
|
|
spin_unlock_bh(&p->fcoe_rx_list.lock);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
if (thread)
|
|
|
|
kthread_stop(thread);
|
|
|
|
|
|
|
|
if (crc_eof)
|
|
|
|
put_page(crc_eof);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* fcoe_cpu_callback() - fcoe cpu hotplug event callback
|
|
|
|
* @nfb: callback data block
|
|
|
|
* @action: event triggering the callback
|
|
|
|
* @hcpu: index for the cpu of this event
|
|
|
|
*
|
|
|
|
* This creates or destroys per cpu data for fcoe
|
|
|
|
*
|
|
|
|
* Returns NOTIFY_OK always.
|
|
|
|
*/
|
|
|
|
static int fcoe_cpu_callback(struct notifier_block *nfb,
|
|
|
|
unsigned long action, void *hcpu)
|
|
|
|
{
|
|
|
|
unsigned cpu = (unsigned long)hcpu;
|
|
|
|
|
|
|
|
switch (action) {
|
|
|
|
case CPU_ONLINE:
|
|
|
|
case CPU_ONLINE_FROZEN:
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
|
2009-03-18 02:41:46 +08:00
|
|
|
fcoe_percpu_thread_create(cpu);
|
|
|
|
break;
|
|
|
|
case CPU_DEAD:
|
|
|
|
case CPU_DEAD_FROZEN:
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
|
2009-03-18 02:41:46 +08:00
|
|
|
fcoe_percpu_thread_destroy(cpu);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
return NOTIFY_OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct notifier_block fcoe_cpu_notifier = {
|
|
|
|
.notifier_call = fcoe_cpu_callback,
|
|
|
|
};
|
|
|
|
|
2008-12-10 07:10:24 +08:00
|
|
|
/**
|
2009-02-28 02:55:45 +08:00
|
|
|
* fcoe_rcv() - this is the fcoe receive function called by NET_RX_SOFTIRQ
|
2008-12-10 07:10:24 +08:00
|
|
|
* @skb: the receive skb
|
|
|
|
* @dev: associated net device
|
|
|
|
* @ptype: context
|
2009-04-22 07:27:36 +08:00
|
|
|
* @olddev: last device
|
2008-12-10 07:10:24 +08:00
|
|
|
*
|
|
|
|
* this function will receive the packet and build fc frame and pass it up
|
|
|
|
*
|
|
|
|
* Returns: 0 for success
|
2009-02-28 02:55:45 +08:00
|
|
|
*/
|
2008-12-10 07:10:24 +08:00
|
|
|
int fcoe_rcv(struct sk_buff *skb, struct net_device *dev,
|
|
|
|
struct packet_type *ptype, struct net_device *olddev)
|
|
|
|
{
|
|
|
|
struct fc_lport *lp;
|
|
|
|
struct fcoe_rcv_info *fr;
|
|
|
|
struct fcoe_softc *fc;
|
|
|
|
struct fc_frame_header *fh;
|
|
|
|
struct fcoe_percpu_s *fps;
|
2009-03-18 02:41:30 +08:00
|
|
|
unsigned short oxid;
|
2009-03-18 02:41:46 +08:00
|
|
|
unsigned int cpu = 0;
|
2008-12-10 07:10:24 +08:00
|
|
|
|
|
|
|
fc = container_of(ptype, struct fcoe_softc, fcoe_packet_type);
|
2009-03-18 02:42:40 +08:00
|
|
|
lp = fc->ctlr.lp;
|
2008-12-10 07:10:24 +08:00
|
|
|
if (unlikely(lp == NULL)) {
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_NETDEV_DBG(dev, "Cannot find hba structure");
|
2008-12-10 07:10:24 +08:00
|
|
|
goto err2;
|
|
|
|
}
|
2009-03-18 02:42:40 +08:00
|
|
|
if (!lp->link_up)
|
|
|
|
goto err2;
|
2008-12-10 07:10:24 +08:00
|
|
|
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_NETDEV_DBG(dev, "skb_info: len:%d data_len:%d head:%p "
|
|
|
|
"data:%p tail:%p end:%p sum:%d dev:%s",
|
|
|
|
skb->len, skb->data_len, skb->head, skb->data,
|
|
|
|
skb_tail_pointer(skb), skb_end_pointer(skb),
|
|
|
|
skb->csum, skb->dev ? skb->dev->name : "<NULL>");
|
2008-12-10 07:10:24 +08:00
|
|
|
|
|
|
|
/* check for FCOE packet type */
|
|
|
|
if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) {
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_NETDEV_DBG(dev, "Wrong FC type frame");
|
2008-12-10 07:10:24 +08:00
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Check for minimum frame length, and make sure required FCoE
|
|
|
|
* and FC headers are pulled into the linear data area.
|
|
|
|
*/
|
|
|
|
if (unlikely((skb->len < FCOE_MIN_FRAME) ||
|
|
|
|
!pskb_may_pull(skb, FCOE_HEADER_LEN)))
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
|
|
|
|
fh = (struct fc_frame_header *) skb_transport_header(skb);
|
|
|
|
|
|
|
|
oxid = ntohs(fh->fh_ox_id);
|
|
|
|
|
|
|
|
fr = fcoe_dev_from_skb(skb);
|
|
|
|
fr->fr_dev = lp;
|
|
|
|
fr->ptype = ptype;
|
2009-03-18 02:41:35 +08:00
|
|
|
|
2008-12-10 07:10:24 +08:00
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
/*
|
|
|
|
* The incoming frame exchange id(oxid) is ANDed with num of online
|
2009-03-18 02:41:46 +08:00
|
|
|
* cpu bits to get cpu and then this cpu is used for selecting
|
|
|
|
* a per cpu kernel thread from fcoe_percpu.
|
2008-12-10 07:10:24 +08:00
|
|
|
*/
|
2009-03-18 02:41:46 +08:00
|
|
|
cpu = oxid & (num_online_cpus() - 1);
|
2008-12-10 07:10:24 +08:00
|
|
|
#endif
|
2009-03-18 02:41:35 +08:00
|
|
|
|
2009-03-18 02:41:46 +08:00
|
|
|
fps = &per_cpu(fcoe_percpu, cpu);
|
2008-12-10 07:10:24 +08:00
|
|
|
spin_lock_bh(&fps->fcoe_rx_list.lock);
|
2009-03-18 02:41:46 +08:00
|
|
|
if (unlikely(!fps->thread)) {
|
|
|
|
/*
|
|
|
|
* The targeted CPU is not ready, let's target
|
|
|
|
* the first CPU now. For non-SMP systems this
|
|
|
|
* will check the same CPU twice.
|
|
|
|
*/
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_NETDEV_DBG(dev, "CPU is online, but no receive thread "
|
|
|
|
"ready for incoming skb- using first online "
|
|
|
|
"CPU.\n");
|
2009-03-18 02:41:46 +08:00
|
|
|
|
|
|
|
spin_unlock_bh(&fps->fcoe_rx_list.lock);
|
|
|
|
cpu = first_cpu(cpu_online_map);
|
|
|
|
fps = &per_cpu(fcoe_percpu, cpu);
|
|
|
|
spin_lock_bh(&fps->fcoe_rx_list.lock);
|
|
|
|
if (!fps->thread) {
|
|
|
|
spin_unlock_bh(&fps->fcoe_rx_list.lock);
|
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We now have a valid CPU that we're targeting for
|
|
|
|
* this skb. We also have this receive thread locked,
|
|
|
|
* so we're free to queue skbs into it's queue.
|
|
|
|
*/
|
2008-12-10 07:10:24 +08:00
|
|
|
__skb_queue_tail(&fps->fcoe_rx_list, skb);
|
|
|
|
if (fps->fcoe_rx_list.qlen == 1)
|
|
|
|
wake_up_process(fps->thread);
|
|
|
|
|
|
|
|
spin_unlock_bh(&fps->fcoe_rx_list.lock);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
err:
|
2009-04-01 06:51:50 +08:00
|
|
|
fc_lport_get_stats(lp)->ErrorFrames++;
|
2008-12-10 07:10:24 +08:00
|
|
|
|
|
|
|
err2:
|
|
|
|
kfree_skb(skb);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2009-02-28 02:55:45 +08:00
|
|
|
* fcoe_start_io() - pass to netdev to start xmit for fcoe
|
2008-12-10 07:10:24 +08:00
|
|
|
* @skb: the skb to be xmitted
|
|
|
|
*
|
|
|
|
* Returns: 0 for success
|
2009-02-28 02:55:45 +08:00
|
|
|
*/
|
2008-12-10 07:10:24 +08:00
|
|
|
static inline int fcoe_start_io(struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
skb_get(skb);
|
|
|
|
rc = dev_queue_xmit(skb);
|
|
|
|
if (rc != 0)
|
|
|
|
return rc;
|
|
|
|
kfree_skb(skb);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2009-04-22 07:27:36 +08:00
|
|
|
* fcoe_get_paged_crc_eof() - in case we need to alloc a page for crc_eof
|
2008-12-10 07:10:24 +08:00
|
|
|
* @skb: the skb to be xmitted
|
|
|
|
* @tlen: total len
|
|
|
|
*
|
|
|
|
* Returns: 0 for success
|
2009-02-28 02:55:45 +08:00
|
|
|
*/
|
2008-12-10 07:10:24 +08:00
|
|
|
static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen)
|
|
|
|
{
|
|
|
|
struct fcoe_percpu_s *fps;
|
|
|
|
struct page *page;
|
|
|
|
|
2009-03-18 02:41:35 +08:00
|
|
|
fps = &get_cpu_var(fcoe_percpu);
|
2008-12-10 07:10:24 +08:00
|
|
|
page = fps->crc_eof_page;
|
|
|
|
if (!page) {
|
|
|
|
page = alloc_page(GFP_ATOMIC);
|
|
|
|
if (!page) {
|
2009-03-18 02:41:35 +08:00
|
|
|
put_cpu_var(fcoe_percpu);
|
2008-12-10 07:10:24 +08:00
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
fps->crc_eof_page = page;
|
2009-03-18 02:41:46 +08:00
|
|
|
fps->crc_eof_offset = 0;
|
2008-12-10 07:10:24 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
get_page(page);
|
|
|
|
skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page,
|
|
|
|
fps->crc_eof_offset, tlen);
|
|
|
|
skb->len += tlen;
|
|
|
|
skb->data_len += tlen;
|
|
|
|
skb->truesize += tlen;
|
|
|
|
fps->crc_eof_offset += sizeof(struct fcoe_crc_eof);
|
|
|
|
|
|
|
|
if (fps->crc_eof_offset >= PAGE_SIZE) {
|
|
|
|
fps->crc_eof_page = NULL;
|
|
|
|
fps->crc_eof_offset = 0;
|
|
|
|
put_page(page);
|
|
|
|
}
|
2009-03-18 02:41:35 +08:00
|
|
|
put_cpu_var(fcoe_percpu);
|
2008-12-10 07:10:24 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2009-02-28 02:55:45 +08:00
|
|
|
* fcoe_fc_crc() - calculates FC CRC in this fcoe skb
|
2009-04-22 07:27:36 +08:00
|
|
|
* @fp: the fc_frame containing data to be checksummed
|
2008-12-10 07:10:24 +08:00
|
|
|
*
|
|
|
|
* This uses crc32() to calculate the crc for fc frame
|
|
|
|
* Return : 32 bit crc
|
2009-02-28 02:55:45 +08:00
|
|
|
*/
|
2008-12-10 07:10:24 +08:00
|
|
|
u32 fcoe_fc_crc(struct fc_frame *fp)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb = fp_skb(fp);
|
|
|
|
struct skb_frag_struct *frag;
|
|
|
|
unsigned char *data;
|
|
|
|
unsigned long off, len, clen;
|
|
|
|
u32 crc;
|
|
|
|
unsigned i;
|
|
|
|
|
|
|
|
crc = crc32(~0, skb->data, skb_headlen(skb));
|
|
|
|
|
|
|
|
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
|
|
|
|
frag = &skb_shinfo(skb)->frags[i];
|
|
|
|
off = frag->page_offset;
|
|
|
|
len = frag->size;
|
|
|
|
while (len > 0) {
|
|
|
|
clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK));
|
|
|
|
data = kmap_atomic(frag->page + (off >> PAGE_SHIFT),
|
|
|
|
KM_SKB_DATA_SOFTIRQ);
|
|
|
|
crc = crc32(crc, data + (off & ~PAGE_MASK), clen);
|
|
|
|
kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ);
|
|
|
|
off += clen;
|
|
|
|
len -= clen;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return crc;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2009-02-28 02:55:45 +08:00
|
|
|
* fcoe_xmit() - FCoE frame transmit function
|
2008-12-10 07:10:24 +08:00
|
|
|
* @lp: the associated local port
|
|
|
|
* @fp: the fc_frame to be transmitted
|
|
|
|
*
|
|
|
|
* Return : 0 for success
|
2009-02-28 02:55:45 +08:00
|
|
|
*/
|
2008-12-10 07:10:24 +08:00
|
|
|
int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
|
|
|
|
{
|
2009-05-07 01:52:34 +08:00
|
|
|
int wlen;
|
2008-12-10 07:10:24 +08:00
|
|
|
u32 crc;
|
|
|
|
struct ethhdr *eh;
|
|
|
|
struct fcoe_crc_eof *cp;
|
|
|
|
struct sk_buff *skb;
|
|
|
|
struct fcoe_dev_stats *stats;
|
|
|
|
struct fc_frame_header *fh;
|
|
|
|
unsigned int hlen; /* header length implies the version */
|
|
|
|
unsigned int tlen; /* trailer length */
|
|
|
|
unsigned int elen; /* eth header, may include vlan */
|
|
|
|
struct fcoe_softc *fc;
|
|
|
|
u8 sof, eof;
|
|
|
|
struct fcoe_hdr *hp;
|
|
|
|
|
|
|
|
WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
|
|
|
|
|
2009-02-28 02:55:55 +08:00
|
|
|
fc = lport_priv(lp);
|
2008-12-10 07:10:24 +08:00
|
|
|
fh = fc_frame_header_get(fp);
|
2009-03-18 02:42:40 +08:00
|
|
|
skb = fp_skb(fp);
|
|
|
|
wlen = skb->len / FCOE_WORD_TO_BYTE;
|
|
|
|
|
|
|
|
if (!lp->link_up) {
|
2009-04-22 07:27:25 +08:00
|
|
|
kfree_skb(skb);
|
2009-03-18 02:42:40 +08:00
|
|
|
return 0;
|
2008-12-10 07:10:24 +08:00
|
|
|
}
|
|
|
|
|
2009-03-18 02:42:40 +08:00
|
|
|
if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
|
|
|
|
fcoe_ctlr_els_send(&fc->ctlr, skb))
|
|
|
|
return 0;
|
|
|
|
|
2008-12-10 07:10:24 +08:00
|
|
|
sof = fr_sof(fp);
|
|
|
|
eof = fr_eof(fp);
|
|
|
|
|
2009-05-07 01:52:46 +08:00
|
|
|
elen = sizeof(struct ethhdr);
|
2008-12-10 07:10:24 +08:00
|
|
|
hlen = sizeof(struct fcoe_hdr);
|
|
|
|
tlen = sizeof(struct fcoe_crc_eof);
|
|
|
|
wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
|
|
|
|
|
|
|
|
/* crc offload */
|
|
|
|
if (likely(lp->crc_offload)) {
|
2009-02-28 06:07:15 +08:00
|
|
|
skb->ip_summed = CHECKSUM_PARTIAL;
|
2008-12-10 07:10:24 +08:00
|
|
|
skb->csum_start = skb_headroom(skb);
|
|
|
|
skb->csum_offset = skb->len;
|
|
|
|
crc = 0;
|
|
|
|
} else {
|
|
|
|
skb->ip_summed = CHECKSUM_NONE;
|
|
|
|
crc = fcoe_fc_crc(fp);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* copy fc crc and eof to the skb buff */
|
|
|
|
if (skb_is_nonlinear(skb)) {
|
|
|
|
skb_frag_t *frag;
|
|
|
|
if (fcoe_get_paged_crc_eof(skb, tlen)) {
|
2009-02-28 02:56:22 +08:00
|
|
|
kfree_skb(skb);
|
2008-12-10 07:10:24 +08:00
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
|
|
|
|
cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ)
|
|
|
|
+ frag->page_offset;
|
|
|
|
} else {
|
|
|
|
cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
|
|
|
|
}
|
|
|
|
|
|
|
|
memset(cp, 0, sizeof(*cp));
|
|
|
|
cp->fcoe_eof = eof;
|
|
|
|
cp->fcoe_crc32 = cpu_to_le32(~crc);
|
|
|
|
|
|
|
|
if (skb_is_nonlinear(skb)) {
|
|
|
|
kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
|
|
|
|
cp = NULL;
|
|
|
|
}
|
|
|
|
|
2009-04-22 07:27:36 +08:00
|
|
|
/* adjust skb network/transport offsets to match mac/fcoe/fc */
|
2008-12-10 07:10:24 +08:00
|
|
|
skb_push(skb, elen + hlen);
|
|
|
|
skb_reset_mac_header(skb);
|
|
|
|
skb_reset_network_header(skb);
|
|
|
|
skb->mac_len = elen;
|
2009-02-28 06:06:37 +08:00
|
|
|
skb->protocol = htons(ETH_P_FCOE);
|
2008-12-10 07:10:24 +08:00
|
|
|
skb->dev = fc->real_dev;
|
|
|
|
|
|
|
|
/* fill up mac and fcoe headers */
|
|
|
|
eh = eth_hdr(skb);
|
|
|
|
eh->h_proto = htons(ETH_P_FCOE);
|
2009-03-18 02:42:40 +08:00
|
|
|
if (fc->ctlr.map_dest)
|
2008-12-10 07:10:24 +08:00
|
|
|
fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
|
|
|
|
else
|
|
|
|
/* insert GW address */
|
2009-03-18 02:42:40 +08:00
|
|
|
memcpy(eh->h_dest, fc->ctlr.dest_addr, ETH_ALEN);
|
2008-12-10 07:10:24 +08:00
|
|
|
|
2009-03-18 02:42:40 +08:00
|
|
|
if (unlikely(fc->ctlr.flogi_oxid != FC_XID_UNKNOWN))
|
|
|
|
memcpy(eh->h_source, fc->ctlr.ctl_src_addr, ETH_ALEN);
|
2008-12-10 07:10:24 +08:00
|
|
|
else
|
2009-03-18 02:42:40 +08:00
|
|
|
memcpy(eh->h_source, fc->ctlr.data_src_addr, ETH_ALEN);
|
2008-12-10 07:10:24 +08:00
|
|
|
|
|
|
|
hp = (struct fcoe_hdr *)(eh + 1);
|
|
|
|
memset(hp, 0, sizeof(*hp));
|
|
|
|
if (FC_FCOE_VER)
|
|
|
|
FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
|
|
|
|
hp->fcoe_sof = sof;
|
|
|
|
|
2009-02-28 06:07:15 +08:00
|
|
|
#ifdef NETIF_F_FSO
|
|
|
|
/* fcoe lso, mss is in max_payload which is non-zero for FCP data */
|
|
|
|
if (lp->seq_offload && fr_max_payload(fp)) {
|
|
|
|
skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
|
|
|
|
skb_shinfo(skb)->gso_size = fr_max_payload(fp);
|
|
|
|
} else {
|
|
|
|
skb_shinfo(skb)->gso_type = 0;
|
|
|
|
skb_shinfo(skb)->gso_size = 0;
|
|
|
|
}
|
|
|
|
#endif
|
2008-12-10 07:10:24 +08:00
|
|
|
/* update tx stats: regardless if LLD fails */
|
2009-04-01 06:51:50 +08:00
|
|
|
stats = fc_lport_get_stats(lp);
|
|
|
|
stats->TxFrames++;
|
|
|
|
stats->TxWords += wlen;
|
2008-12-10 07:10:24 +08:00
|
|
|
|
|
|
|
/* send down to lld */
|
|
|
|
fr_dev(fp) = lp;
|
|
|
|
if (fc->fcoe_pending_queue.qlen)
|
2009-05-07 01:52:34 +08:00
|
|
|
fcoe_check_wait_queue(lp, skb);
|
|
|
|
else if (fcoe_start_io(skb))
|
|
|
|
fcoe_check_wait_queue(lp, skb);
|
2008-12-10 07:10:24 +08:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-02-28 02:55:45 +08:00
|
|
|
/**
|
|
|
|
* fcoe_percpu_receive_thread() - recv thread per cpu
|
2008-12-10 07:10:24 +08:00
|
|
|
* @arg: ptr to the fcoe per cpu struct
|
|
|
|
*
|
|
|
|
* Return: 0 for success
|
|
|
|
*/
|
|
|
|
int fcoe_percpu_receive_thread(void *arg)
|
|
|
|
{
|
|
|
|
struct fcoe_percpu_s *p = arg;
|
|
|
|
u32 fr_len;
|
|
|
|
struct fc_lport *lp;
|
|
|
|
struct fcoe_rcv_info *fr;
|
|
|
|
struct fcoe_dev_stats *stats;
|
|
|
|
struct fc_frame_header *fh;
|
|
|
|
struct sk_buff *skb;
|
|
|
|
struct fcoe_crc_eof crc_eof;
|
|
|
|
struct fc_frame *fp;
|
|
|
|
u8 *mac = NULL;
|
|
|
|
struct fcoe_softc *fc;
|
|
|
|
struct fcoe_hdr *hp;
|
|
|
|
|
2009-02-28 02:56:38 +08:00
|
|
|
set_user_nice(current, -20);
|
2008-12-10 07:10:24 +08:00
|
|
|
|
|
|
|
while (!kthread_should_stop()) {
|
|
|
|
|
|
|
|
spin_lock_bh(&p->fcoe_rx_list.lock);
|
|
|
|
while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) {
|
|
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
|
|
spin_unlock_bh(&p->fcoe_rx_list.lock);
|
|
|
|
schedule();
|
|
|
|
set_current_state(TASK_RUNNING);
|
|
|
|
if (kthread_should_stop())
|
|
|
|
return 0;
|
|
|
|
spin_lock_bh(&p->fcoe_rx_list.lock);
|
|
|
|
}
|
|
|
|
spin_unlock_bh(&p->fcoe_rx_list.lock);
|
|
|
|
fr = fcoe_dev_from_skb(skb);
|
|
|
|
lp = fr->fr_dev;
|
|
|
|
if (unlikely(lp == NULL)) {
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_NETDEV_DBG(skb->dev, "Invalid HBA Structure");
|
2008-12-10 07:10:24 +08:00
|
|
|
kfree_skb(skb);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d "
|
|
|
|
"head:%p data:%p tail:%p end:%p sum:%d dev:%s",
|
|
|
|
skb->len, skb->data_len,
|
|
|
|
skb->head, skb->data, skb_tail_pointer(skb),
|
|
|
|
skb_end_pointer(skb), skb->csum,
|
|
|
|
skb->dev ? skb->dev->name : "<NULL>");
|
2008-12-10 07:10:24 +08:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Save source MAC address before discarding header.
|
|
|
|
*/
|
|
|
|
fc = lport_priv(lp);
|
|
|
|
if (skb_is_nonlinear(skb))
|
|
|
|
skb_linearize(skb); /* not ideal */
|
2009-03-18 02:42:40 +08:00
|
|
|
mac = eth_hdr(skb)->h_source;
|
2008-12-10 07:10:24 +08:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Frame length checks and setting up the header pointers
|
|
|
|
* was done in fcoe_rcv already.
|
|
|
|
*/
|
|
|
|
hp = (struct fcoe_hdr *) skb_network_header(skb);
|
|
|
|
fh = (struct fc_frame_header *) skb_transport_header(skb);
|
|
|
|
|
2009-04-01 06:51:50 +08:00
|
|
|
stats = fc_lport_get_stats(lp);
|
2008-12-10 07:10:24 +08:00
|
|
|
if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
|
2009-04-01 06:51:50 +08:00
|
|
|
if (stats->ErrorFrames < 5)
|
2009-06-11 06:30:59 +08:00
|
|
|
printk(KERN_WARNING "fcoe: FCoE version "
|
2009-04-01 06:51:50 +08:00
|
|
|
"mismatch: The frame has "
|
|
|
|
"version %x, but the "
|
|
|
|
"initiator supports version "
|
|
|
|
"%x\n", FC_FCOE_DECAPS_VER(hp),
|
|
|
|
FC_FCOE_VER);
|
|
|
|
stats->ErrorFrames++;
|
2008-12-10 07:10:24 +08:00
|
|
|
kfree_skb(skb);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
skb_pull(skb, sizeof(struct fcoe_hdr));
|
|
|
|
fr_len = skb->len - sizeof(struct fcoe_crc_eof);
|
|
|
|
|
2009-04-01 06:51:50 +08:00
|
|
|
stats->RxFrames++;
|
|
|
|
stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
|
2008-12-10 07:10:24 +08:00
|
|
|
|
|
|
|
fp = (struct fc_frame *)skb;
|
|
|
|
fc_frame_init(fp);
|
|
|
|
fr_dev(fp) = lp;
|
|
|
|
fr_sof(fp) = hp->fcoe_sof;
|
|
|
|
|
|
|
|
/* Copy out the CRC and EOF trailer for access */
|
|
|
|
if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) {
|
|
|
|
kfree_skb(skb);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
fr_eof(fp) = crc_eof.fcoe_eof;
|
|
|
|
fr_crc(fp) = crc_eof.fcoe_crc32;
|
|
|
|
if (pskb_trim(skb, fr_len)) {
|
|
|
|
kfree_skb(skb);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We only check CRC if no offload is available and if it is
|
|
|
|
* it's solicited data, in which case, the FCP layer would
|
|
|
|
* check it during the copy.
|
|
|
|
*/
|
2009-02-28 06:07:31 +08:00
|
|
|
if (lp->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
|
2008-12-10 07:10:24 +08:00
|
|
|
fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
|
|
|
|
else
|
|
|
|
fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
|
|
|
|
|
|
|
|
fh = fc_frame_header_get(fp);
|
|
|
|
if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
|
|
|
|
fh->fh_type == FC_TYPE_FCP) {
|
|
|
|
fc_exch_recv(lp, lp->emp, fp);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) {
|
|
|
|
if (le32_to_cpu(fr_crc(fp)) !=
|
|
|
|
~crc32(~0, skb->data, fr_len)) {
|
2009-06-11 06:30:59 +08:00
|
|
|
if (stats->InvalidCRCCount < 5)
|
2008-12-10 07:10:24 +08:00
|
|
|
printk(KERN_WARNING "fcoe: dropping "
|
|
|
|
"frame with CRC error\n");
|
|
|
|
stats->InvalidCRCCount++;
|
|
|
|
stats->ErrorFrames++;
|
|
|
|
fc_frame_free(fp);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
|
|
|
|
}
|
2009-03-18 02:42:40 +08:00
|
|
|
if (unlikely(fc->ctlr.flogi_oxid != FC_XID_UNKNOWN) &&
|
|
|
|
fcoe_ctlr_recv_flogi(&fc->ctlr, fp, mac)) {
|
|
|
|
fc_frame_free(fp);
|
|
|
|
continue;
|
|
|
|
}
|
2008-12-10 07:10:24 +08:00
|
|
|
fc_exch_recv(lp, lp->emp, fp);
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2009-04-22 07:27:36 +08:00
|
|
|
* fcoe_check_wait_queue() - attempt to clear the transmit backlog
|
|
|
|
* @lp: the fc_lport
|
2008-12-10 07:10:24 +08:00
|
|
|
*
|
|
|
|
* This empties the wait_queue, dequeue the head of the wait_queue queue
|
|
|
|
* and calls fcoe_start_io() for each packet, if all skb have been
|
2009-02-28 02:56:27 +08:00
|
|
|
* transmitted, return qlen or -1 if a error occurs, then restore
|
2009-04-22 07:27:36 +08:00
|
|
|
* wait_queue and try again later.
|
2008-12-10 07:10:24 +08:00
|
|
|
*
|
|
|
|
* The wait_queue is used when the skb transmit fails. skb will go
|
2009-04-22 07:27:36 +08:00
|
|
|
* in the wait_queue which will be emptied by the timer function or
|
2008-12-10 07:10:24 +08:00
|
|
|
* by the next skb transmit.
|
2009-02-28 02:55:45 +08:00
|
|
|
*/
|
2009-05-07 01:52:34 +08:00
|
|
|
static void fcoe_check_wait_queue(struct fc_lport *lp, struct sk_buff *skb)
|
2008-12-10 07:10:24 +08:00
|
|
|
{
|
2009-02-28 02:56:32 +08:00
|
|
|
struct fcoe_softc *fc = lport_priv(lp);
|
2009-05-07 01:52:34 +08:00
|
|
|
int rc;
|
2008-12-10 07:10:24 +08:00
|
|
|
|
|
|
|
spin_lock_bh(&fc->fcoe_pending_queue.lock);
|
2009-05-07 01:52:34 +08:00
|
|
|
|
|
|
|
if (skb)
|
|
|
|
__skb_queue_tail(&fc->fcoe_pending_queue, skb);
|
|
|
|
|
2009-02-28 02:56:27 +08:00
|
|
|
if (fc->fcoe_pending_queue_active)
|
|
|
|
goto out;
|
|
|
|
fc->fcoe_pending_queue_active = 1;
|
2009-02-28 02:56:32 +08:00
|
|
|
|
|
|
|
while (fc->fcoe_pending_queue.qlen) {
|
|
|
|
/* keep qlen > 0 until fcoe_start_io succeeds */
|
|
|
|
fc->fcoe_pending_queue.qlen++;
|
|
|
|
skb = __skb_dequeue(&fc->fcoe_pending_queue);
|
|
|
|
|
|
|
|
spin_unlock_bh(&fc->fcoe_pending_queue.lock);
|
|
|
|
rc = fcoe_start_io(skb);
|
|
|
|
spin_lock_bh(&fc->fcoe_pending_queue.lock);
|
|
|
|
|
|
|
|
if (rc) {
|
|
|
|
__skb_queue_head(&fc->fcoe_pending_queue, skb);
|
|
|
|
/* undo temporary increment above */
|
|
|
|
fc->fcoe_pending_queue.qlen--;
|
|
|
|
break;
|
2008-12-10 07:10:24 +08:00
|
|
|
}
|
2009-02-28 02:56:32 +08:00
|
|
|
/* undo temporary increment above */
|
|
|
|
fc->fcoe_pending_queue.qlen--;
|
2008-12-10 07:10:24 +08:00
|
|
|
}
|
2009-02-28 02:56:32 +08:00
|
|
|
|
|
|
|
if (fc->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH)
|
|
|
|
lp->qfull = 0;
|
2009-05-07 01:52:40 +08:00
|
|
|
if (fc->fcoe_pending_queue.qlen && !timer_pending(&fc->timer))
|
|
|
|
mod_timer(&fc->timer, jiffies + 2);
|
2009-02-28 02:56:27 +08:00
|
|
|
fc->fcoe_pending_queue_active = 0;
|
|
|
|
out:
|
2009-05-07 01:52:34 +08:00
|
|
|
if (fc->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
|
|
|
|
lp->qfull = 1;
|
2008-12-10 07:10:24 +08:00
|
|
|
spin_unlock_bh(&fc->fcoe_pending_queue.lock);
|
2009-05-07 01:52:34 +08:00
|
|
|
return;
|
2008-12-10 07:10:24 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2009-02-28 02:55:45 +08:00
|
|
|
* fcoe_dev_setup() - setup link change notification interface
|
|
|
|
*/
|
2009-04-28 12:49:31 +08:00
|
|
|
static void fcoe_dev_setup(void)
|
2008-12-10 07:10:24 +08:00
|
|
|
{
|
|
|
|
register_netdevice_notifier(&fcoe_notifier);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2009-04-28 12:49:31 +08:00
|
|
|
* fcoe_dev_cleanup() - cleanup link change notification interface
|
2009-02-28 02:55:45 +08:00
|
|
|
*/
|
2008-12-10 07:10:24 +08:00
|
|
|
static void fcoe_dev_cleanup(void)
|
|
|
|
{
|
|
|
|
unregister_netdevice_notifier(&fcoe_notifier);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2009-02-28 02:55:45 +08:00
|
|
|
* fcoe_device_notification() - netdev event notification callback
|
2008-12-10 07:10:24 +08:00
|
|
|
* @notifier: context of the notification
|
|
|
|
* @event: type of event
|
|
|
|
* @ptr: fixed array for output parsed ifname
|
|
|
|
*
|
|
|
|
* This function is called by the ethernet driver in case of link change event
|
|
|
|
*
|
|
|
|
* Returns: 0 for success
|
2009-02-28 02:55:45 +08:00
|
|
|
*/
|
2008-12-10 07:10:24 +08:00
|
|
|
static int fcoe_device_notification(struct notifier_block *notifier,
|
|
|
|
ulong event, void *ptr)
|
|
|
|
{
|
|
|
|
struct fc_lport *lp = NULL;
|
|
|
|
struct net_device *real_dev = ptr;
|
|
|
|
struct fcoe_softc *fc;
|
|
|
|
struct fcoe_dev_stats *stats;
|
2009-03-18 02:42:40 +08:00
|
|
|
u32 link_possible = 1;
|
2008-12-10 07:10:24 +08:00
|
|
|
u32 mfs;
|
|
|
|
int rc = NOTIFY_OK;
|
|
|
|
|
|
|
|
read_lock(&fcoe_hostlist_lock);
|
|
|
|
list_for_each_entry(fc, &fcoe_hostlist, list) {
|
|
|
|
if (fc->real_dev == real_dev) {
|
2009-03-18 02:42:40 +08:00
|
|
|
lp = fc->ctlr.lp;
|
2008-12-10 07:10:24 +08:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
read_unlock(&fcoe_hostlist_lock);
|
|
|
|
if (lp == NULL) {
|
|
|
|
rc = NOTIFY_DONE;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
switch (event) {
|
|
|
|
case NETDEV_DOWN:
|
|
|
|
case NETDEV_GOING_DOWN:
|
2009-03-18 02:42:40 +08:00
|
|
|
link_possible = 0;
|
2008-12-10 07:10:24 +08:00
|
|
|
break;
|
|
|
|
case NETDEV_UP:
|
|
|
|
case NETDEV_CHANGE:
|
|
|
|
break;
|
|
|
|
case NETDEV_CHANGEMTU:
|
|
|
|
mfs = fc->real_dev->mtu -
|
|
|
|
(sizeof(struct fcoe_hdr) +
|
|
|
|
sizeof(struct fcoe_crc_eof));
|
|
|
|
if (mfs >= FC_MIN_MAX_FRAME)
|
|
|
|
fc_set_mfs(lp, mfs);
|
|
|
|
break;
|
|
|
|
case NETDEV_REGISTER:
|
|
|
|
break;
|
|
|
|
default:
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_NETDEV_DBG(real_dev, "Unknown event %ld "
|
|
|
|
"from netdev netlink\n", event);
|
2008-12-10 07:10:24 +08:00
|
|
|
}
|
2009-03-18 02:42:40 +08:00
|
|
|
if (link_possible && !fcoe_link_ok(lp))
|
|
|
|
fcoe_ctlr_link_up(&fc->ctlr);
|
|
|
|
else if (fcoe_ctlr_link_down(&fc->ctlr)) {
|
|
|
|
stats = fc_lport_get_stats(lp);
|
|
|
|
stats->LinkFailureCount++;
|
|
|
|
fcoe_clean_pending_queue(lp);
|
2008-12-10 07:10:24 +08:00
|
|
|
}
|
|
|
|
out:
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2009-02-28 02:55:45 +08:00
|
|
|
* fcoe_if_to_netdev() - parse a name buffer to get netdev
|
2008-12-10 07:10:24 +08:00
|
|
|
* @buffer: incoming buffer to be copied
|
|
|
|
*
|
2009-04-22 07:27:36 +08:00
|
|
|
* Returns: NULL or ptr to net_device
|
2009-02-28 02:55:45 +08:00
|
|
|
*/
|
2008-12-10 07:10:24 +08:00
|
|
|
static struct net_device *fcoe_if_to_netdev(const char *buffer)
|
|
|
|
{
|
|
|
|
char *cp;
|
|
|
|
char ifname[IFNAMSIZ + 2];
|
|
|
|
|
|
|
|
if (buffer) {
|
|
|
|
strlcpy(ifname, buffer, IFNAMSIZ);
|
|
|
|
cp = ifname + strlen(ifname);
|
|
|
|
while (--cp >= ifname && *cp == '\n')
|
|
|
|
*cp = '\0';
|
|
|
|
return dev_get_by_name(&init_net, ifname);
|
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2009-04-22 07:27:36 +08:00
|
|
|
* fcoe_netdev_to_module_owner() - finds out the driver module of the netdev
|
2008-12-10 07:10:24 +08:00
|
|
|
* @netdev: the target netdev
|
|
|
|
*
|
|
|
|
* Returns: ptr to the struct module, NULL for failure
|
2009-02-28 02:55:45 +08:00
|
|
|
*/
|
2009-02-28 02:55:50 +08:00
|
|
|
static struct module *
|
|
|
|
fcoe_netdev_to_module_owner(const struct net_device *netdev)
|
2008-12-10 07:10:24 +08:00
|
|
|
{
|
|
|
|
struct device *dev;
|
|
|
|
|
|
|
|
if (!netdev)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
dev = netdev->dev.parent;
|
|
|
|
if (!dev)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
if (!dev->driver)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
return dev->driver->owner;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2009-02-28 02:55:45 +08:00
|
|
|
* fcoe_ethdrv_get() - Hold the Ethernet driver
|
2008-12-10 07:10:24 +08:00
|
|
|
* @netdev: the target netdev
|
|
|
|
*
|
2009-02-28 02:55:45 +08:00
|
|
|
* Holds the Ethernet driver module by try_module_get() for
|
|
|
|
* the corresponding netdev.
|
|
|
|
*
|
2009-04-22 07:27:36 +08:00
|
|
|
* Returns: 0 for success
|
2009-02-28 02:55:45 +08:00
|
|
|
*/
|
2008-12-10 07:10:24 +08:00
|
|
|
static int fcoe_ethdrv_get(const struct net_device *netdev)
|
|
|
|
{
|
|
|
|
struct module *owner;
|
|
|
|
|
|
|
|
owner = fcoe_netdev_to_module_owner(netdev);
|
|
|
|
if (owner) {
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_NETDEV_DBG(netdev, "Hold driver module %s\n",
|
|
|
|
module_name(owner));
|
2008-12-10 07:10:24 +08:00
|
|
|
return try_module_get(owner);
|
|
|
|
}
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2009-02-28 02:55:45 +08:00
|
|
|
* fcoe_ethdrv_put() - Release the Ethernet driver
|
2008-12-10 07:10:24 +08:00
|
|
|
* @netdev: the target netdev
|
|
|
|
*
|
2009-02-28 02:55:45 +08:00
|
|
|
* Releases the Ethernet driver module by module_put for
|
|
|
|
* the corresponding netdev.
|
|
|
|
*
|
2009-04-22 07:27:36 +08:00
|
|
|
* Returns: 0 for success
|
2009-02-28 02:55:45 +08:00
|
|
|
*/
|
2008-12-10 07:10:24 +08:00
|
|
|
static int fcoe_ethdrv_put(const struct net_device *netdev)
|
|
|
|
{
|
|
|
|
struct module *owner;
|
|
|
|
|
|
|
|
owner = fcoe_netdev_to_module_owner(netdev);
|
|
|
|
if (owner) {
|
2009-06-11 06:30:59 +08:00
|
|
|
FCOE_NETDEV_DBG(netdev, "Release driver module %s\n",
|
|
|
|
module_name(owner));
|
2008-12-10 07:10:24 +08:00
|
|
|
module_put(owner);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2009-02-28 02:55:45 +08:00
|
|
|
* fcoe_destroy() - handles the destroy from sysfs
|
2009-04-22 07:27:36 +08:00
|
|
|
* @buffer: expected to be an eth if name
|
2008-12-10 07:10:24 +08:00
|
|
|
* @kp: associated kernel param
|
|
|
|
*
|
|
|
|
* Returns: 0 for success
|
2009-02-28 02:55:45 +08:00
|
|
|
*/
|
2008-12-10 07:10:24 +08:00
|
|
|
static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
|
|
|
|
{
|
|
|
|
int rc;
|
|
|
|
struct net_device *netdev;
|
|
|
|
|
|
|
|
netdev = fcoe_if_to_netdev(buffer);
|
|
|
|
if (!netdev) {
|
|
|
|
rc = -ENODEV;
|
|
|
|
goto out_nodev;
|
|
|
|
}
|
|
|
|
/* look for existing lport */
|
|
|
|
if (!fcoe_hostlist_lookup(netdev)) {
|
|
|
|
rc = -ENODEV;
|
|
|
|
goto out_putdev;
|
|
|
|
}
|
2009-03-28 00:06:31 +08:00
|
|
|
rc = fcoe_if_destroy(netdev);
|
2008-12-10 07:10:24 +08:00
|
|
|
if (rc) {
|
2009-06-11 06:30:59 +08:00
|
|
|
printk(KERN_ERR "fcoe: Failed to destroy interface (%s)\n",
|
2008-12-10 07:10:24 +08:00
|
|
|
netdev->name);
|
|
|
|
rc = -EIO;
|
|
|
|
goto out_putdev;
|
|
|
|
}
|
|
|
|
fcoe_ethdrv_put(netdev);
|
|
|
|
rc = 0;
|
|
|
|
out_putdev:
|
|
|
|
dev_put(netdev);
|
|
|
|
out_nodev:
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2009-02-28 02:55:45 +08:00
|
|
|
* fcoe_create() - Handles the create call from sysfs
|
2009-04-22 07:27:36 +08:00
|
|
|
* @buffer: expected to be an eth if name
|
2008-12-10 07:10:24 +08:00
|
|
|
* @kp: associated kernel param
|
|
|
|
*
|
|
|
|
* Returns: 0 for success
|
2009-02-28 02:55:45 +08:00
|
|
|
*/
|
2008-12-10 07:10:24 +08:00
|
|
|
static int fcoe_create(const char *buffer, struct kernel_param *kp)
|
|
|
|
{
|
|
|
|
int rc;
|
|
|
|
struct net_device *netdev;
|
|
|
|
|
|
|
|
netdev = fcoe_if_to_netdev(buffer);
|
|
|
|
if (!netdev) {
|
|
|
|
rc = -ENODEV;
|
|
|
|
goto out_nodev;
|
|
|
|
}
|
|
|
|
/* look for existing lport */
|
|
|
|
if (fcoe_hostlist_lookup(netdev)) {
|
|
|
|
rc = -EEXIST;
|
|
|
|
goto out_putdev;
|
|
|
|
}
|
|
|
|
fcoe_ethdrv_get(netdev);
|
|
|
|
|
2009-03-28 00:06:31 +08:00
|
|
|
rc = fcoe_if_create(netdev);
|
2008-12-10 07:10:24 +08:00
|
|
|
if (rc) {
|
2009-06-11 06:30:59 +08:00
|
|
|
printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
|
2008-12-10 07:10:24 +08:00
|
|
|
netdev->name);
|
|
|
|
fcoe_ethdrv_put(netdev);
|
|
|
|
rc = -EIO;
|
|
|
|
goto out_putdev;
|
|
|
|
}
|
|
|
|
rc = 0;
|
|
|
|
out_putdev:
|
|
|
|
dev_put(netdev);
|
|
|
|
out_nodev:
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR);
|
|
|
|
__MODULE_PARM_TYPE(create, "string");
|
|
|
|
MODULE_PARM_DESC(create, "Create fcoe port using net device passed in.");
|
|
|
|
module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR);
|
|
|
|
__MODULE_PARM_TYPE(destroy, "string");
|
|
|
|
MODULE_PARM_DESC(destroy, "Destroy fcoe port");
|
|
|
|
|
2009-02-28 02:55:45 +08:00
|
|
|
/**
|
|
|
|
* fcoe_link_ok() - Check if link is ok for the fc_lport
|
2008-12-10 07:10:24 +08:00
|
|
|
* @lp: ptr to the fc_lport
|
|
|
|
*
|
|
|
|
* Any permanently-disqualifying conditions have been previously checked.
|
|
|
|
* This also updates the speed setting, which may change with link for 100/1000.
|
|
|
|
*
|
|
|
|
* This function should probably be checking for PAUSE support at some point
|
|
|
|
* in the future. Currently Per-priority-pause is not determinable using
|
|
|
|
* ethtool, so we shouldn't be restrictive until that problem is resolved.
|
|
|
|
*
|
|
|
|
* Returns: 0 if link is OK for use by FCoE.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
int fcoe_link_ok(struct fc_lport *lp)
|
|
|
|
{
|
2009-02-28 02:55:55 +08:00
|
|
|
struct fcoe_softc *fc = lport_priv(lp);
|
2008-12-10 07:10:24 +08:00
|
|
|
struct net_device *dev = fc->real_dev;
|
|
|
|
struct ethtool_cmd ecmd = { ETHTOOL_GSET };
|
|
|
|
|
2009-07-30 08:04:01 +08:00
|
|
|
if ((dev->flags & IFF_UP) && netif_carrier_ok(dev) &&
|
|
|
|
(!dev_ethtool_get_settings(dev, &ecmd))) {
|
|
|
|
lp->link_supported_speeds &=
|
|
|
|
~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
|
|
|
|
if (ecmd.supported & (SUPPORTED_1000baseT_Half |
|
|
|
|
SUPPORTED_1000baseT_Full))
|
|
|
|
lp->link_supported_speeds |= FC_PORTSPEED_1GBIT;
|
|
|
|
if (ecmd.supported & SUPPORTED_10000baseT_Full)
|
|
|
|
lp->link_supported_speeds |=
|
|
|
|
FC_PORTSPEED_10GBIT;
|
|
|
|
if (ecmd.speed == SPEED_1000)
|
|
|
|
lp->link_speed = FC_PORTSPEED_1GBIT;
|
|
|
|
if (ecmd.speed == SPEED_10000)
|
|
|
|
lp->link_speed = FC_PORTSPEED_10GBIT;
|
2008-12-10 07:10:24 +08:00
|
|
|
|
2009-07-30 08:04:01 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
return -1;
|
2008-12-10 07:10:24 +08:00
|
|
|
}
|
|
|
|
|
2009-02-28 02:55:45 +08:00
|
|
|
/**
|
|
|
|
* fcoe_percpu_clean() - Clear the pending skbs for an lport
|
2008-12-10 07:10:24 +08:00
|
|
|
* @lp: the fc_lport
|
|
|
|
*/
|
|
|
|
void fcoe_percpu_clean(struct fc_lport *lp)
|
|
|
|
{
|
|
|
|
struct fcoe_percpu_s *pp;
|
|
|
|
struct fcoe_rcv_info *fr;
|
|
|
|
struct sk_buff_head *list;
|
|
|
|
struct sk_buff *skb, *next;
|
|
|
|
struct sk_buff *head;
|
2009-03-18 02:41:35 +08:00
|
|
|
unsigned int cpu;
|
2008-12-10 07:10:24 +08:00
|
|
|
|
2009-03-18 02:41:35 +08:00
|
|
|
for_each_possible_cpu(cpu) {
|
|
|
|
pp = &per_cpu(fcoe_percpu, cpu);
|
|
|
|
spin_lock_bh(&pp->fcoe_rx_list.lock);
|
|
|
|
list = &pp->fcoe_rx_list;
|
|
|
|
head = list->next;
|
|
|
|
for (skb = head; skb != (struct sk_buff *)list;
|
|
|
|
skb = next) {
|
|
|
|
next = skb->next;
|
|
|
|
fr = fcoe_dev_from_skb(skb);
|
|
|
|
if (fr->fr_dev == lp) {
|
|
|
|
__skb_unlink(skb, list);
|
|
|
|
kfree_skb(skb);
|
2008-12-10 07:10:24 +08:00
|
|
|
}
|
|
|
|
}
|
2009-03-18 02:41:35 +08:00
|
|
|
spin_unlock_bh(&pp->fcoe_rx_list.lock);
|
2008-12-10 07:10:24 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2009-02-28 02:55:45 +08:00
|
|
|
* fcoe_clean_pending_queue() - Dequeue a skb and free it
|
2008-12-10 07:10:24 +08:00
|
|
|
* @lp: the corresponding fc_lport
|
|
|
|
*
|
|
|
|
* Returns: none
|
2009-02-28 02:55:45 +08:00
|
|
|
*/
|
2008-12-10 07:10:24 +08:00
|
|
|
void fcoe_clean_pending_queue(struct fc_lport *lp)
|
|
|
|
{
|
|
|
|
struct fcoe_softc *fc = lport_priv(lp);
|
|
|
|
struct sk_buff *skb;
|
|
|
|
|
|
|
|
spin_lock_bh(&fc->fcoe_pending_queue.lock);
|
|
|
|
while ((skb = __skb_dequeue(&fc->fcoe_pending_queue)) != NULL) {
|
|
|
|
spin_unlock_bh(&fc->fcoe_pending_queue.lock);
|
|
|
|
kfree_skb(skb);
|
|
|
|
spin_lock_bh(&fc->fcoe_pending_queue.lock);
|
|
|
|
}
|
|
|
|
spin_unlock_bh(&fc->fcoe_pending_queue.lock);
|
|
|
|
}
|
|
|
|
|
2009-02-28 02:55:45 +08:00
|
|
|
/**
|
|
|
|
* fcoe_reset() - Resets the fcoe
|
2008-12-10 07:10:24 +08:00
|
|
|
* @shost: shost the reset is from
|
|
|
|
*
|
|
|
|
* Returns: always 0
|
|
|
|
*/
|
|
|
|
int fcoe_reset(struct Scsi_Host *shost)
|
|
|
|
{
|
|
|
|
struct fc_lport *lport = shost_priv(shost);
|
|
|
|
fc_lport_reset(lport);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-02-28 02:55:45 +08:00
|
|
|
/**
|
|
|
|
* fcoe_hostlist_lookup_softc() - find the corresponding lport by a given device
|
2009-04-22 07:27:36 +08:00
|
|
|
* @dev: this is currently ptr to net_device
|
2008-12-10 07:10:24 +08:00
|
|
|
*
|
|
|
|
* Returns: NULL or the located fcoe_softc
|
|
|
|
*/
|
2009-02-28 02:55:50 +08:00
|
|
|
static struct fcoe_softc *
|
|
|
|
fcoe_hostlist_lookup_softc(const struct net_device *dev)
|
2008-12-10 07:10:24 +08:00
|
|
|
{
|
|
|
|
struct fcoe_softc *fc;
|
|
|
|
|
|
|
|
read_lock(&fcoe_hostlist_lock);
|
|
|
|
list_for_each_entry(fc, &fcoe_hostlist, list) {
|
|
|
|
if (fc->real_dev == dev) {
|
|
|
|
read_unlock(&fcoe_hostlist_lock);
|
|
|
|
return fc;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
read_unlock(&fcoe_hostlist_lock);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2009-02-28 02:55:45 +08:00
|
|
|
/**
|
|
|
|
* fcoe_hostlist_lookup() - Find the corresponding lport by netdev
|
2008-12-10 07:10:24 +08:00
|
|
|
* @netdev: ptr to net_device
|
|
|
|
*
|
|
|
|
* Returns: 0 for success
|
|
|
|
*/
|
|
|
|
struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
|
|
|
|
{
|
|
|
|
struct fcoe_softc *fc;
|
|
|
|
|
|
|
|
fc = fcoe_hostlist_lookup_softc(netdev);
|
|
|
|
|
2009-03-18 02:42:40 +08:00
|
|
|
return (fc) ? fc->ctlr.lp : NULL;
|
2008-12-10 07:10:24 +08:00
|
|
|
}
|
|
|
|
|
2009-02-28 02:55:45 +08:00
|
|
|
/**
|
|
|
|
* fcoe_hostlist_add() - Add a lport to lports list
|
2009-04-22 07:27:36 +08:00
|
|
|
* @lp: ptr to the fc_lport to be added
|
2008-12-10 07:10:24 +08:00
|
|
|
*
|
|
|
|
* Returns: 0 for success
|
|
|
|
*/
|
|
|
|
int fcoe_hostlist_add(const struct fc_lport *lp)
|
|
|
|
{
|
|
|
|
struct fcoe_softc *fc;
|
|
|
|
|
|
|
|
fc = fcoe_hostlist_lookup_softc(fcoe_netdev(lp));
|
|
|
|
if (!fc) {
|
2009-02-28 02:55:55 +08:00
|
|
|
fc = lport_priv(lp);
|
2008-12-10 07:10:24 +08:00
|
|
|
write_lock_bh(&fcoe_hostlist_lock);
|
|
|
|
list_add_tail(&fc->list, &fcoe_hostlist);
|
|
|
|
write_unlock_bh(&fcoe_hostlist_lock);
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-02-28 02:55:45 +08:00
|
|
|
/**
|
|
|
|
* fcoe_hostlist_remove() - remove a lport from lports list
|
2009-04-22 07:27:36 +08:00
|
|
|
* @lp: ptr to the fc_lport to be removed
|
2008-12-10 07:10:24 +08:00
|
|
|
*
|
|
|
|
* Returns: 0 for success
|
|
|
|
*/
|
|
|
|
int fcoe_hostlist_remove(const struct fc_lport *lp)
|
|
|
|
{
|
|
|
|
struct fcoe_softc *fc;
|
|
|
|
|
|
|
|
fc = fcoe_hostlist_lookup_softc(fcoe_netdev(lp));
|
|
|
|
BUG_ON(!fc);
|
|
|
|
write_lock_bh(&fcoe_hostlist_lock);
|
|
|
|
list_del(&fc->list);
|
|
|
|
write_unlock_bh(&fcoe_hostlist_lock);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2009-02-28 02:55:45 +08:00
|
|
|
* fcoe_init() - fcoe module loading initialization
|
2008-12-10 07:10:24 +08:00
|
|
|
*
|
|
|
|
* Returns 0 on success, negative on failure
|
2009-02-28 02:55:45 +08:00
|
|
|
*/
|
2008-12-10 07:10:24 +08:00
|
|
|
static int __init fcoe_init(void)
|
|
|
|
{
|
2009-03-18 02:41:30 +08:00
|
|
|
unsigned int cpu;
|
2009-03-18 02:41:46 +08:00
|
|
|
int rc = 0;
|
2008-12-10 07:10:24 +08:00
|
|
|
struct fcoe_percpu_s *p;
|
|
|
|
|
|
|
|
INIT_LIST_HEAD(&fcoe_hostlist);
|
|
|
|
rwlock_init(&fcoe_hostlist_lock);
|
|
|
|
|
2009-03-18 02:41:30 +08:00
|
|
|
for_each_possible_cpu(cpu) {
|
2009-03-18 02:41:35 +08:00
|
|
|
p = &per_cpu(fcoe_percpu, cpu);
|
2009-03-18 02:41:30 +08:00
|
|
|
skb_queue_head_init(&p->fcoe_rx_list);
|
|
|
|
}
|
|
|
|
|
2009-03-18 02:41:46 +08:00
|
|
|
for_each_online_cpu(cpu)
|
|
|
|
fcoe_percpu_thread_create(cpu);
|
2008-12-10 07:10:24 +08:00
|
|
|
|
2009-03-18 02:41:46 +08:00
|
|
|
/* Initialize per CPU interrupt thread */
|
|
|
|
rc = register_hotcpu_notifier(&fcoe_cpu_notifier);
|
|
|
|
if (rc)
|
|
|
|
goto out_free;
|
2008-12-10 07:10:24 +08:00
|
|
|
|
2009-03-18 02:41:46 +08:00
|
|
|
/* Setup link change notification */
|
2008-12-10 07:10:24 +08:00
|
|
|
fcoe_dev_setup();
|
|
|
|
|
2009-03-28 00:06:31 +08:00
|
|
|
fcoe_if_init();
|
2008-12-10 07:10:24 +08:00
|
|
|
|
|
|
|
return 0;
|
2009-03-18 02:41:46 +08:00
|
|
|
|
|
|
|
out_free:
|
|
|
|
for_each_online_cpu(cpu) {
|
|
|
|
fcoe_percpu_thread_destroy(cpu);
|
|
|
|
}
|
|
|
|
|
|
|
|
return rc;
|
2008-12-10 07:10:24 +08:00
|
|
|
}
|
|
|
|
module_init(fcoe_init);
|
|
|
|
|
|
|
|
/**
|
2009-02-28 02:55:45 +08:00
|
|
|
* fcoe_exit() - fcoe module unloading cleanup
|
2008-12-10 07:10:24 +08:00
|
|
|
*
|
|
|
|
* Returns 0 on success, negative on failure
|
2009-02-28 02:55:45 +08:00
|
|
|
*/
|
2008-12-10 07:10:24 +08:00
|
|
|
static void __exit fcoe_exit(void)
|
|
|
|
{
|
2009-03-18 02:41:35 +08:00
|
|
|
unsigned int cpu;
|
2008-12-10 07:10:24 +08:00
|
|
|
struct fcoe_softc *fc, *tmp;
|
|
|
|
|
|
|
|
fcoe_dev_cleanup();
|
|
|
|
|
2009-03-28 00:03:29 +08:00
|
|
|
/* releases the associated fcoe hosts */
|
2008-12-10 07:10:24 +08:00
|
|
|
list_for_each_entry_safe(fc, tmp, &fcoe_hostlist, list)
|
2009-03-28 00:06:31 +08:00
|
|
|
fcoe_if_destroy(fc->real_dev);
|
2008-12-10 07:10:24 +08:00
|
|
|
|
2009-03-18 02:41:46 +08:00
|
|
|
unregister_hotcpu_notifier(&fcoe_cpu_notifier);
|
|
|
|
|
|
|
|
for_each_online_cpu(cpu) {
|
|
|
|
fcoe_percpu_thread_destroy(cpu);
|
2008-12-10 07:10:24 +08:00
|
|
|
}
|
|
|
|
|
2009-03-28 00:06:31 +08:00
|
|
|
/* detach from scsi transport */
|
|
|
|
fcoe_if_exit();
|
2008-12-10 07:10:24 +08:00
|
|
|
}
|
|
|
|
module_exit(fcoe_exit);
|