[SCSI] fcoe: Fibre Channel over Ethernet
Encapsulation protocol for running Fibre Channel over Ethernet interfaces. Creates virtual Fibre Channel host adapters using libfc. This layer is the LLD to the scsi-ml. It allocates the Scsi_Host, utilizes libfc for Fibre Channel protocol processing and interacts with netdev to send/receive Ethernet packets. Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>hifive-unleashed-5.1
Robert Love
James Bottomley
parent
42e9a92fe6
commit
85b4aa4926
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@ -609,6 +609,13 @@ config LIBFC
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---help---
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Fibre Channel library module
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config FCOE
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tristate "FCoE module"
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depends on SCSI
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select LIBFC
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---help---
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Fibre Channel over Ethernet module
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config SCSI_DMX3191D
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tristate "DMX3191D SCSI support"
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depends on PCI && SCSI
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@ -37,6 +37,7 @@ obj-$(CONFIG_SCSI_SRP_ATTRS) += scsi_transport_srp.o
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obj-$(CONFIG_SCSI_DH) += device_handler/
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obj-$(CONFIG_LIBFC) += libfc/
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obj-$(CONFIG_FCOE) += fcoe/
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obj-$(CONFIG_ISCSI_TCP) += libiscsi.o libiscsi_tcp.o iscsi_tcp.o
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obj-$(CONFIG_INFINIBAND_ISER) += libiscsi.o
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obj-$(CONFIG_SCSI_A4000T) += 53c700.o a4000t.o
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@ -0,0 +1,8 @@
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# $Id: Makefile
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obj-$(CONFIG_FCOE) += fcoe.o
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fcoe-y := \
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libfcoe.o \
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fcoe_sw.o \
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fc_transport_fcoe.o
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@ -0,0 +1,446 @@
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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/pci.h>
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#include <scsi/libfcoe.h>
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#include <scsi/fc_transport_fcoe.h>
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/* internal fcoe transport */
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struct fcoe_transport_internal {
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struct fcoe_transport *t;
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struct net_device *netdev;
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struct list_head list;
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};
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/* fcoe transports list and its lock */
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static LIST_HEAD(fcoe_transports);
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static DEFINE_MUTEX(fcoe_transports_lock);
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/**
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* fcoe_transport_default - returns ptr to the default transport fcoe_sw
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**/
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struct fcoe_transport *fcoe_transport_default(void)
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{
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return &fcoe_sw_transport;
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}
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/**
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* fcoe_transport_to_pcidev - get the pci dev from a netdev
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* @netdev: the netdev that pci dev will be retrived from
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*
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* Returns: NULL or the corrsponding pci_dev
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**/
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struct pci_dev *fcoe_transport_pcidev(const struct net_device *netdev)
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{
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if (!netdev->dev.parent)
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return NULL;
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return to_pci_dev(netdev->dev.parent);
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}
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/**
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* fcoe_transport_device_lookup - find out netdev is managed by the
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* transport
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* assign a transport to a device
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* @netdev: the netdev the transport to be attached to
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*
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* This will look for existing offload driver, if not found, it falls back to
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* the default sw hba (fcoe_sw) as its fcoe transport.
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*
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* Returns: 0 for success
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**/
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static struct fcoe_transport_internal *fcoe_transport_device_lookup(
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struct fcoe_transport *t, struct net_device *netdev)
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{
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struct fcoe_transport_internal *ti;
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/* assign the transpor to this device */
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mutex_lock(&t->devlock);
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list_for_each_entry(ti, &t->devlist, list) {
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if (ti->netdev == netdev) {
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mutex_unlock(&t->devlock);
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return ti;
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}
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}
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mutex_unlock(&t->devlock);
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return NULL;
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}
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/**
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* fcoe_transport_device_add - assign a transport to a device
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* @netdev: the netdev the transport to be attached to
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*
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* This will look for existing offload driver, if not found, it falls back to
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* the default sw hba (fcoe_sw) as its fcoe transport.
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*
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* Returns: 0 for success
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**/
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static int fcoe_transport_device_add(struct fcoe_transport *t,
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struct net_device *netdev)
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{
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struct fcoe_transport_internal *ti;
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ti = fcoe_transport_device_lookup(t, netdev);
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if (ti) {
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printk(KERN_DEBUG "fcoe_transport_device_add:"
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"device %s is already added to transport %s\n",
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netdev->name, t->name);
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return -EEXIST;
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}
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/* allocate an internal struct to host the netdev and the list */
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ti = kzalloc(sizeof(*ti), GFP_KERNEL);
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if (!ti)
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return -ENOMEM;
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ti->t = t;
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ti->netdev = netdev;
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INIT_LIST_HEAD(&ti->list);
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dev_hold(ti->netdev);
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mutex_lock(&t->devlock);
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list_add(&ti->list, &t->devlist);
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mutex_unlock(&t->devlock);
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printk(KERN_DEBUG "fcoe_transport_device_add:"
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"device %s added to transport %s\n",
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netdev->name, t->name);
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return 0;
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}
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/**
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* fcoe_transport_device_remove - remove a device from its transport
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* @netdev: the netdev the transport to be attached to
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*
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* this removes the device from the transport so the given transport will
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* not manage this device any more
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*
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* Returns: 0 for success
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**/
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static int fcoe_transport_device_remove(struct fcoe_transport *t,
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struct net_device *netdev)
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{
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struct fcoe_transport_internal *ti;
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ti = fcoe_transport_device_lookup(t, netdev);
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if (!ti) {
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printk(KERN_DEBUG "fcoe_transport_device_remove:"
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"device %s is not managed by transport %s\n",
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netdev->name, t->name);
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return -ENODEV;
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}
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mutex_lock(&t->devlock);
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list_del(&ti->list);
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mutex_unlock(&t->devlock);
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printk(KERN_DEBUG "fcoe_transport_device_remove:"
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"device %s removed from transport %s\n",
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netdev->name, t->name);
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dev_put(ti->netdev);
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kfree(ti);
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return 0;
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}
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/**
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* fcoe_transport_device_remove_all - remove all from transport devlist
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*
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* this removes the device from the transport so the given transport will
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* not manage this device any more
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*
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* Returns: 0 for success
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**/
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static void fcoe_transport_device_remove_all(struct fcoe_transport *t)
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{
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struct fcoe_transport_internal *ti, *tmp;
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mutex_lock(&t->devlock);
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list_for_each_entry_safe(ti, tmp, &t->devlist, list) {
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list_del(&ti->list);
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kfree(ti);
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}
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mutex_unlock(&t->devlock);
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}
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/**
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* fcoe_transport_match - use the bus device match function to match the hw
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* @t: the fcoe transport
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* @netdev:
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*
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* This function is used to check if the givne transport wants to manage the
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* input netdev. if the transports implements the match function, it will be
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* called, o.w. we just compare the pci vendor and device id.
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*
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* Returns: true for match up
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**/
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static bool fcoe_transport_match(struct fcoe_transport *t,
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struct net_device *netdev)
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{
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/* match transport by vendor and device id */
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struct pci_dev *pci;
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pci = fcoe_transport_pcidev(netdev);
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if (pci) {
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printk(KERN_DEBUG "fcoe_transport_match:"
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"%s:%x:%x -- %s:%x:%x\n",
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t->name, t->vendor, t->device,
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netdev->name, pci->vendor, pci->device);
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/* if transport supports match */
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if (t->match)
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return t->match(netdev);
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/* else just compare the vendor and device id: pci only */
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return (t->vendor == pci->vendor) && (t->device == pci->device);
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}
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return false;
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}
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/**
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* fcoe_transport_lookup - check if the transport is already registered
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* @t: the transport to be looked up
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*
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* This compares the parent device (pci) vendor and device id
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*
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* Returns: NULL if not found
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*
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* TODO - return default sw transport if no other transport is found
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**/
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static struct fcoe_transport *fcoe_transport_lookup(
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struct net_device *netdev)
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{
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struct fcoe_transport *t;
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mutex_lock(&fcoe_transports_lock);
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list_for_each_entry(t, &fcoe_transports, list) {
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if (fcoe_transport_match(t, netdev)) {
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mutex_unlock(&fcoe_transports_lock);
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return t;
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}
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}
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mutex_unlock(&fcoe_transports_lock);
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printk(KERN_DEBUG "fcoe_transport_lookup:"
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"use default transport for %s\n", netdev->name);
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return fcoe_transport_default();
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}
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/**
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* fcoe_transport_register - adds a fcoe transport to the fcoe transports list
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* @t: ptr to the fcoe transport to be added
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*
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* Returns: 0 for success
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**/
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int fcoe_transport_register(struct fcoe_transport *t)
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{
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struct fcoe_transport *tt;
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/* TODO - add fcoe_transport specific initialization here */
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mutex_lock(&fcoe_transports_lock);
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list_for_each_entry(tt, &fcoe_transports, list) {
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if (tt == t) {
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mutex_unlock(&fcoe_transports_lock);
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return -EEXIST;
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}
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}
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list_add_tail(&t->list, &fcoe_transports);
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mutex_unlock(&fcoe_transports_lock);
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mutex_init(&t->devlock);
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INIT_LIST_HEAD(&t->devlist);
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printk(KERN_DEBUG "fcoe_transport_register:%s\n", t->name);
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return 0;
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}
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EXPORT_SYMBOL_GPL(fcoe_transport_register);
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/**
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* fcoe_transport_unregister - remove the tranport fro the fcoe transports list
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* @t: ptr to the fcoe transport to be removed
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*
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* Returns: 0 for success
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**/
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int fcoe_transport_unregister(struct fcoe_transport *t)
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{
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struct fcoe_transport *tt, *tmp;
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mutex_lock(&fcoe_transports_lock);
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list_for_each_entry_safe(tt, tmp, &fcoe_transports, list) {
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if (tt == t) {
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list_del(&t->list);
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mutex_unlock(&fcoe_transports_lock);
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fcoe_transport_device_remove_all(t);
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printk(KERN_DEBUG "fcoe_transport_unregister:%s\n",
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t->name);
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return 0;
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}
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}
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mutex_unlock(&fcoe_transports_lock);
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return -ENODEV;
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}
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EXPORT_SYMBOL_GPL(fcoe_transport_unregister);
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/*
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* fcoe_load_transport_driver - load an offload driver by alias name
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* @netdev: the target net device
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*
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* Requests for an offload driver module as the fcoe transport, if fails, it
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* falls back to use the SW HBA (fcoe_sw) as its transport
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*
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* TODO -
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* 1. supports only PCI device
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* 2. needs fix for VLAn and bonding
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* 3. pure hw fcoe hba may not have netdev
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*
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* Returns: 0 for success
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**/
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int fcoe_load_transport_driver(struct net_device *netdev)
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{
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struct pci_dev *pci;
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struct device *dev = netdev->dev.parent;
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if (fcoe_transport_lookup(netdev)) {
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/* load default transport */
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printk(KERN_DEBUG "fcoe: already loaded transport for %s\n",
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netdev->name);
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return -EEXIST;
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}
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pci = to_pci_dev(dev);
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if (dev->bus != &pci_bus_type) {
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printk(KERN_DEBUG "fcoe: support noly PCI device\n");
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return -ENODEV;
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}
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printk(KERN_DEBUG "fcoe: loading driver fcoe-pci-0x%04x-0x%04x\n",
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pci->vendor, pci->device);
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return request_module("fcoe-pci-0x%04x-0x%04x",
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pci->vendor, pci->device);
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}
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EXPORT_SYMBOL_GPL(fcoe_load_transport_driver);
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/**
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* fcoe_transport_attach - load transport to fcoe
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* @netdev: the netdev the transport to be attached to
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*
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* This will look for existing offload driver, if not found, it falls back to
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* the default sw hba (fcoe_sw) as its fcoe transport.
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*
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* Returns: 0 for success
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**/
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int fcoe_transport_attach(struct net_device *netdev)
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{
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struct fcoe_transport *t;
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/* find the corresponding transport */
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t = fcoe_transport_lookup(netdev);
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if (!t) {
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printk(KERN_DEBUG "fcoe_transport_attach"
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":no transport for %s:use %s\n",
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netdev->name, t->name);
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return -ENODEV;
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}
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/* add to the transport */
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if (fcoe_transport_device_add(t, netdev)) {
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printk(KERN_DEBUG "fcoe_transport_attach"
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":failed to add %s to tramsport %s\n",
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netdev->name, t->name);
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return -EIO;
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}
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/* transport create function */
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if (t->create)
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t->create(netdev);
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printk(KERN_DEBUG "fcoe_transport_attach:transport %s for %s\n",
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t->name, netdev->name);
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return 0;
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}
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EXPORT_SYMBOL_GPL(fcoe_transport_attach);
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/**
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* fcoe_transport_release - unload transport from fcoe
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* @netdev: the net device on which fcoe is to be released
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*
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* Returns: 0 for success
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**/
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int fcoe_transport_release(struct net_device *netdev)
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{
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struct fcoe_transport *t;
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/* find the corresponding transport */
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t = fcoe_transport_lookup(netdev);
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if (!t) {
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printk(KERN_DEBUG "fcoe_transport_release:"
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"no transport for %s:use %s\n",
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netdev->name, t->name);
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return -ENODEV;
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}
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/* remove the device from the transport */
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if (fcoe_transport_device_remove(t, netdev)) {
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printk(KERN_DEBUG "fcoe_transport_release:"
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"failed to add %s to tramsport %s\n",
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netdev->name, t->name);
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return -EIO;
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}
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/* transport destroy function */
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if (t->destroy)
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t->destroy(netdev);
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printk(KERN_DEBUG "fcoe_transport_release:"
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"device %s dettached from transport %s\n",
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netdev->name, t->name);
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return 0;
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}
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EXPORT_SYMBOL_GPL(fcoe_transport_release);
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/**
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* fcoe_transport_init - initializes fcoe transport layer
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*
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* This prepares for the fcoe transport layer
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*
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* Returns: none
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**/
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int __init fcoe_transport_init(void)
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{
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INIT_LIST_HEAD(&fcoe_transports);
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mutex_init(&fcoe_transports_lock);
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return 0;
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}
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/**
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* fcoe_transport_exit - cleans up the fcoe transport layer
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* This cleans up the fcoe transport layer. removing any transport on the list,
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* note that the transport destroy func is not called here.
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*
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* Returns: none
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**/
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int __exit fcoe_transport_exit(void)
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{
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struct fcoe_transport *t, *tmp;
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mutex_lock(&fcoe_transports_lock);
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list_for_each_entry_safe(t, tmp, &fcoe_transports, list) {
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list_del(&t->list);
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mutex_unlock(&fcoe_transports_lock);
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fcoe_transport_device_remove_all(t);
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mutex_lock(&fcoe_transports_lock);
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}
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mutex_unlock(&fcoe_transports_lock);
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return 0;
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}
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@ -0,0 +1,494 @@
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/*
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* Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
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*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms and conditions of the GNU General Public License,
|
||||
* version 2, as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope it will be useful, but WITHOUT
|
||||
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||||
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||||
* more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License along with
|
||||
* this program; if not, write to the Free Software Foundation, Inc.,
|
||||
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
|
||||
*
|
||||
* Maintained at www.Open-FCoE.org
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/version.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/pci.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/spinlock.h>
|
||||
#include <linux/netdevice.h>
|
||||
#include <linux/etherdevice.h>
|
||||
#include <linux/if_vlan.h>
|
||||
#include <net/rtnetlink.h>
|
||||
|
||||
#include <scsi/fc/fc_els.h>
|
||||
#include <scsi/fc/fc_encaps.h>
|
||||
#include <scsi/fc/fc_fs.h>
|
||||
#include <scsi/scsi_transport.h>
|
||||
#include <scsi/scsi_transport_fc.h>
|
||||
|
||||
#include <scsi/libfc.h>
|
||||
#include <scsi/libfcoe.h>
|
||||
#include <scsi/fc_transport_fcoe.h>
|
||||
|
||||
#define FCOE_SW_VERSION "0.1"
|
||||
#define FCOE_SW_NAME "fcoesw"
|
||||
#define FCOE_SW_VENDOR "Open-FCoE.org"
|
||||
|
||||
#define FCOE_MAX_LUN 255
|
||||
#define FCOE_MAX_FCP_TARGET 256
|
||||
|
||||
#define FCOE_MAX_OUTSTANDING_COMMANDS 1024
|
||||
|
||||
#define FCOE_MIN_XID 0x0001 /* the min xid supported by fcoe_sw */
|
||||
#define FCOE_MAX_XID 0x07ef /* the max xid supported by fcoe_sw */
|
||||
|
||||
static struct scsi_transport_template *scsi_transport_fcoe_sw;
|
||||
|
||||
struct fc_function_template fcoe_sw_transport_function = {
|
||||
.show_host_node_name = 1,
|
||||
.show_host_port_name = 1,
|
||||
.show_host_supported_classes = 1,
|
||||
.show_host_supported_fc4s = 1,
|
||||
.show_host_active_fc4s = 1,
|
||||
.show_host_maxframe_size = 1,
|
||||
|
||||
.show_host_port_id = 1,
|
||||
.show_host_supported_speeds = 1,
|
||||
.get_host_speed = fc_get_host_speed,
|
||||
.show_host_speed = 1,
|
||||
.show_host_port_type = 1,
|
||||
.get_host_port_state = fc_get_host_port_state,
|
||||
.show_host_port_state = 1,
|
||||
.show_host_symbolic_name = 1,
|
||||
|
||||
.dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
|
||||
.show_rport_maxframe_size = 1,
|
||||
.show_rport_supported_classes = 1,
|
||||
|
||||
.show_host_fabric_name = 1,
|
||||
.show_starget_node_name = 1,
|
||||
.show_starget_port_name = 1,
|
||||
.show_starget_port_id = 1,
|
||||
.set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
|
||||
.show_rport_dev_loss_tmo = 1,
|
||||
.get_fc_host_stats = fc_get_host_stats,
|
||||
.issue_fc_host_lip = fcoe_reset,
|
||||
|
||||
.terminate_rport_io = fc_rport_terminate_io,
|
||||
};
|
||||
|
||||
static struct scsi_host_template fcoe_sw_shost_template = {
|
||||
.module = THIS_MODULE,
|
||||
.name = "FCoE Driver",
|
||||
.proc_name = FCOE_SW_NAME,
|
||||
.queuecommand = fc_queuecommand,
|
||||
.eh_abort_handler = fc_eh_abort,
|
||||
.eh_device_reset_handler = fc_eh_device_reset,
|
||||
.eh_host_reset_handler = fc_eh_host_reset,
|
||||
.slave_alloc = fc_slave_alloc,
|
||||
.change_queue_depth = fc_change_queue_depth,
|
||||
.change_queue_type = fc_change_queue_type,
|
||||
.this_id = -1,
|
||||
.cmd_per_lun = 32,
|
||||
.can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
|
||||
.use_clustering = ENABLE_CLUSTERING,
|
||||
.sg_tablesize = SG_ALL,
|
||||
.max_sectors = 0xffff,
|
||||
};
|
||||
|
||||
/*
|
||||
* fcoe_sw_lport_config - sets up the fc_lport
|
||||
* @lp: ptr to the fc_lport
|
||||
* @shost: ptr to the parent scsi host
|
||||
*
|
||||
* Returns: 0 for success
|
||||
*
|
||||
*/
|
||||
static int fcoe_sw_lport_config(struct fc_lport *lp)
|
||||
{
|
||||
int i = 0;
|
||||
|
||||
lp->link_status = 0;
|
||||
lp->max_retry_count = 3;
|
||||
lp->e_d_tov = 2 * 1000; /* FC-FS default */
|
||||
lp->r_a_tov = 2 * 2 * 1000;
|
||||
lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
|
||||
FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
|
||||
|
||||
/*
|
||||
* allocate per cpu stats block
|
||||
*/
|
||||
for_each_online_cpu(i)
|
||||
lp->dev_stats[i] = kzalloc(sizeof(struct fcoe_dev_stats),
|
||||
GFP_KERNEL);
|
||||
|
||||
/* lport fc_lport related configuration */
|
||||
fc_lport_config(lp);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* fcoe_sw_netdev_config - sets up fcoe_softc for lport and network
|
||||
* related properties
|
||||
* @lp : ptr to the fc_lport
|
||||
* @netdev : ptr to the associated netdevice struct
|
||||
*
|
||||
* Must be called after fcoe_sw_lport_config() as it will use lport mutex
|
||||
*
|
||||
* Returns : 0 for success
|
||||
*
|
||||
*/
|
||||
static int fcoe_sw_netdev_config(struct fc_lport *lp, struct net_device *netdev)
|
||||
{
|
||||
u32 mfs;
|
||||
u64 wwnn, wwpn;
|
||||
struct fcoe_softc *fc;
|
||||
u8 flogi_maddr[ETH_ALEN];
|
||||
|
||||
/* Setup lport private data to point to fcoe softc */
|
||||
fc = lport_priv(lp);
|
||||
fc->lp = lp;
|
||||
fc->real_dev = netdev;
|
||||
fc->phys_dev = netdev;
|
||||
|
||||
/* Require support for get_pauseparam ethtool op. */
|
||||
if (netdev->priv_flags & IFF_802_1Q_VLAN)
|
||||
fc->phys_dev = vlan_dev_real_dev(netdev);
|
||||
|
||||
/* Do not support for bonding device */
|
||||
if ((fc->real_dev->priv_flags & IFF_MASTER_ALB) ||
|
||||
(fc->real_dev->priv_flags & IFF_SLAVE_INACTIVE) ||
|
||||
(fc->real_dev->priv_flags & IFF_MASTER_8023AD)) {
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
|
||||
/*
|
||||
* Determine max frame size based on underlying device and optional
|
||||
* user-configured limit. If the MFS is too low, fcoe_link_ok()
|
||||
* will return 0, so do this first.
|
||||
*/
|
||||
mfs = fc->real_dev->mtu - (sizeof(struct fcoe_hdr) +
|
||||
sizeof(struct fcoe_crc_eof));
|
||||
if (fc_set_mfs(lp, mfs))
|
||||
return -EINVAL;
|
||||
|
||||
lp->link_status = ~FC_PAUSE & ~FC_LINK_UP;
|
||||
if (!fcoe_link_ok(lp))
|
||||
lp->link_status |= FC_LINK_UP;
|
||||
|
||||
/* offload features support */
|
||||
if (fc->real_dev->features & NETIF_F_SG)
|
||||
lp->sg_supp = 1;
|
||||
|
||||
|
||||
skb_queue_head_init(&fc->fcoe_pending_queue);
|
||||
|
||||
/* setup Source Mac Address */
|
||||
memcpy(fc->ctl_src_addr, fc->real_dev->dev_addr,
|
||||
fc->real_dev->addr_len);
|
||||
|
||||
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);
|
||||
dev_unicast_add(fc->real_dev, flogi_maddr, ETH_ALEN);
|
||||
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);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* fcoe_sw_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_sw_lport_config) and fcoe_sw_netdev_config()
|
||||
*
|
||||
* Returns : 0 for success
|
||||
*
|
||||
*/
|
||||
static int fcoe_sw_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) {
|
||||
FC_DBG("fcoe_sw_shost_config:error on scsi_add_host\n");
|
||||
return rc;
|
||||
}
|
||||
sprintf(fc_host_symbolic_name(lp->host), "%s v%s over %s",
|
||||
FCOE_SW_NAME, FCOE_SW_VERSION,
|
||||
fcoe_netdev(lp)->name);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* fcoe_sw_em_config - allocates em for this lport
|
||||
* @lp: the port that em is to allocated for
|
||||
*
|
||||
* Returns : 0 on success
|
||||
*/
|
||||
static inline int fcoe_sw_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_sw_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_sw_destroy(struct net_device *netdev)
|
||||
{
|
||||
int cpu;
|
||||
struct fc_lport *lp = NULL;
|
||||
struct fcoe_softc *fc;
|
||||
u8 flogi_maddr[ETH_ALEN];
|
||||
|
||||
BUG_ON(!netdev);
|
||||
|
||||
printk(KERN_DEBUG "fcoe_sw_destroy:interface on %s\n",
|
||||
netdev->name);
|
||||
|
||||
lp = fcoe_hostlist_lookup(netdev);
|
||||
if (!lp)
|
||||
return -ENODEV;
|
||||
|
||||
fc = fcoe_softc(lp);
|
||||
|
||||
/* Logout of the fabric */
|
||||
fc_fabric_logoff(lp);
|
||||
|
||||
/* Remove the instance from fcoe's list */
|
||||
fcoe_hostlist_remove(lp);
|
||||
|
||||
/* Don't listen for Ethernet packets anymore */
|
||||
dev_remove_pack(&fc->fcoe_packet_type);
|
||||
|
||||
/* 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);
|
||||
|
||||
/* Delete secondary MAC addresses */
|
||||
rtnl_lock();
|
||||
memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
|
||||
dev_unicast_delete(fc->real_dev, flogi_maddr, ETH_ALEN);
|
||||
if (compare_ether_addr(fc->data_src_addr, (u8[6]) { 0 }))
|
||||
dev_unicast_delete(fc->real_dev, fc->data_src_addr, ETH_ALEN);
|
||||
rtnl_unlock();
|
||||
|
||||
/* Free the per-CPU revieve threads */
|
||||
fcoe_percpu_clean(lp);
|
||||
|
||||
/* Free existing skbs */
|
||||
fcoe_clean_pending_queue(lp);
|
||||
|
||||
/* Free memory used by statistical counters */
|
||||
for_each_online_cpu(cpu)
|
||||
kfree(lp->dev_stats[cpu]);
|
||||
|
||||
/* Release the net_device and Scsi_Host */
|
||||
dev_put(fc->real_dev);
|
||||
scsi_host_put(lp->host);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct libfc_function_template fcoe_sw_libfc_fcn_templ = {
|
||||
.frame_send = fcoe_xmit,
|
||||
};
|
||||
|
||||
/*
|
||||
* fcoe_sw_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_sw_create(struct net_device *netdev)
|
||||
{
|
||||
int rc;
|
||||
struct fc_lport *lp = NULL;
|
||||
struct fcoe_softc *fc;
|
||||
struct Scsi_Host *shost;
|
||||
|
||||
BUG_ON(!netdev);
|
||||
|
||||
printk(KERN_DEBUG "fcoe_sw_create:interface on %s\n",
|
||||
netdev->name);
|
||||
|
||||
lp = fcoe_hostlist_lookup(netdev);
|
||||
if (lp)
|
||||
return -EEXIST;
|
||||
|
||||
shost = fcoe_host_alloc(&fcoe_sw_shost_template,
|
||||
sizeof(struct fcoe_softc));
|
||||
if (!shost) {
|
||||
FC_DBG("Could not allocate host structure\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
lp = shost_priv(shost);
|
||||
fc = lport_priv(lp);
|
||||
|
||||
/* configure fc_lport, e.g., em */
|
||||
rc = fcoe_sw_lport_config(lp);
|
||||
if (rc) {
|
||||
FC_DBG("Could not configure lport\n");
|
||||
goto out_host_put;
|
||||
}
|
||||
|
||||
/* configure lport network properties */
|
||||
rc = fcoe_sw_netdev_config(lp, netdev);
|
||||
if (rc) {
|
||||
FC_DBG("Could not configure netdev for lport\n");
|
||||
goto out_host_put;
|
||||
}
|
||||
|
||||
/* configure lport scsi host properties */
|
||||
rc = fcoe_sw_shost_config(lp, shost, &netdev->dev);
|
||||
if (rc) {
|
||||
FC_DBG("Could not configure shost for lport\n");
|
||||
goto out_host_put;
|
||||
}
|
||||
|
||||
/* lport exch manager allocation */
|
||||
rc = fcoe_sw_em_config(lp);
|
||||
if (rc) {
|
||||
FC_DBG("Could not configure em for lport\n");
|
||||
goto out_host_put;
|
||||
}
|
||||
|
||||
/* Initialize the library */
|
||||
rc = fcoe_libfc_config(lp, &fcoe_sw_libfc_fcn_templ);
|
||||
if (rc) {
|
||||
FC_DBG("Could not configure libfc for lport!\n");
|
||||
goto out_lp_destroy;
|
||||
}
|
||||
|
||||
/* add to lports list */
|
||||
fcoe_hostlist_add(lp);
|
||||
|
||||
lp->boot_time = jiffies;
|
||||
|
||||
fc_fabric_login(lp);
|
||||
|
||||
dev_hold(netdev);
|
||||
|
||||
return rc;
|
||||
|
||||
out_lp_destroy:
|
||||
fc_exch_mgr_free(lp->emp); /* Free the EM */
|
||||
out_host_put:
|
||||
scsi_host_put(lp->host);
|
||||
return rc;
|
||||
}
|
||||
|
||||
/*
|
||||
* fcoe_sw_match - the fcoe sw transport match function
|
||||
*
|
||||
* Returns : false always
|
||||
*/
|
||||
static bool fcoe_sw_match(struct net_device *netdev)
|
||||
{
|
||||
/* FIXME - for sw transport, always return false */
|
||||
return false;
|
||||
}
|
||||
|
||||
/* the sw hba fcoe transport */
|
||||
struct fcoe_transport fcoe_sw_transport = {
|
||||
.name = "fcoesw",
|
||||
.create = fcoe_sw_create,
|
||||
.destroy = fcoe_sw_destroy,
|
||||
.match = fcoe_sw_match,
|
||||
.vendor = 0x0,
|
||||
.device = 0xffff,
|
||||
};
|
||||
|
||||
/*
|
||||
* fcoe_sw_init - registers fcoe_sw_transport
|
||||
*
|
||||
* Returns : 0 on success
|
||||
*/
|
||||
int __init fcoe_sw_init(void)
|
||||
{
|
||||
/* attach to scsi transport */
|
||||
scsi_transport_fcoe_sw =
|
||||
fc_attach_transport(&fcoe_sw_transport_function);
|
||||
if (!scsi_transport_fcoe_sw) {
|
||||
printk(KERN_ERR "fcoe_sw_init:fc_attach_transport() failed\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
/* register sw transport */
|
||||
fcoe_transport_register(&fcoe_sw_transport);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* fcoe_sw_exit - unregisters fcoe_sw_transport
|
||||
*
|
||||
* Returns : 0 on success
|
||||
*/
|
||||
int __exit fcoe_sw_exit(void)
|
||||
{
|
||||
/* dettach the transport */
|
||||
fc_release_transport(scsi_transport_fcoe_sw);
|
||||
fcoe_transport_unregister(&fcoe_sw_transport);
|
||||
return 0;
|
||||
}
|
||||
File diff suppressed because it is too large
Load Diff
|
|
@ -0,0 +1,54 @@
|
|||
#ifndef FC_TRANSPORT_FCOE_H
|
||||
#define FC_TRANSPORT_FCOE_H
|
||||
|
||||
#include <linux/device.h>
|
||||
#include <linux/netdevice.h>
|
||||
#include <scsi/scsi_host.h>
|
||||
#include <scsi/libfc.h>
|
||||
|
||||
/**
|
||||
* struct fcoe_transport - FCoE transport struct for generic transport
|
||||
* for Ethernet devices as well as pure HBAs
|
||||
*
|
||||
* @name: name for thsi transport
|
||||
* @bus: physical bus type (pci_bus_type)
|
||||
* @driver: physical bus driver for network device
|
||||
* @create: entry create function
|
||||
* @destroy: exit destroy function
|
||||
* @list: list of transports
|
||||
*/
|
||||
struct fcoe_transport {
|
||||
char *name;
|
||||
unsigned short vendor;
|
||||
unsigned short device;
|
||||
struct bus_type *bus;
|
||||
struct device_driver *driver;
|
||||
int (*create)(struct net_device *device);
|
||||
int (*destroy)(struct net_device *device);
|
||||
bool (*match)(struct net_device *device);
|
||||
struct list_head list;
|
||||
struct list_head devlist;
|
||||
struct mutex devlock;
|
||||
};
|
||||
|
||||
/**
|
||||
* MODULE_ALIAS_FCOE_PCI
|
||||
*
|
||||
* some care must be taken with this, vendor and device MUST be a hex value
|
||||
* preceded with 0x and with letters in lower case (0x12ab, not 0x12AB or 12AB)
|
||||
*/
|
||||
#define MODULE_ALIAS_FCOE_PCI(vendor, device) \
|
||||
MODULE_ALIAS("fcoe-pci-" __stringify(vendor) "-" __stringify(device))
|
||||
|
||||
/* exported funcs */
|
||||
int fcoe_transport_attach(struct net_device *netdev);
|
||||
int fcoe_transport_release(struct net_device *netdev);
|
||||
int fcoe_transport_register(struct fcoe_transport *t);
|
||||
int fcoe_transport_unregister(struct fcoe_transport *t);
|
||||
int fcoe_load_transport_driver(struct net_device *netdev);
|
||||
int __init fcoe_transport_init(void);
|
||||
int __exit fcoe_transport_exit(void);
|
||||
|
||||
/* fcow_sw is the default transport */
|
||||
extern struct fcoe_transport fcoe_sw_transport;
|
||||
#endif /* FC_TRANSPORT_FCOE_H */
|
||||
|
|
@ -0,0 +1,176 @@
|
|||
/*
|
||||
* Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms and conditions of the GNU General Public License,
|
||||
* version 2, as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope it will be useful, but WITHOUT
|
||||
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||||
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||||
* more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License along with
|
||||
* this program; if not, write to the Free Software Foundation, Inc.,
|
||||
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
|
||||
*
|
||||
* Maintained at www.Open-FCoE.org
|
||||
*/
|
||||
|
||||
#ifndef _LIBFCOE_H
|
||||
#define _LIBFCOE_H
|
||||
|
||||
#include <linux/netdevice.h>
|
||||
#include <linux/skbuff.h>
|
||||
#include <scsi/fc/fc_fcoe.h>
|
||||
#include <scsi/libfc.h>
|
||||
|
||||
/*
|
||||
* this percpu struct for fcoe
|
||||
*/
|
||||
struct fcoe_percpu_s {
|
||||
int cpu;
|
||||
struct task_struct *thread;
|
||||
struct sk_buff_head fcoe_rx_list;
|
||||
struct page *crc_eof_page;
|
||||
int crc_eof_offset;
|
||||
};
|
||||
|
||||
/*
|
||||
* the fcoe sw transport private data
|
||||
*/
|
||||
struct fcoe_softc {
|
||||
struct list_head list;
|
||||
struct fc_lport *lp;
|
||||
struct net_device *real_dev;
|
||||
struct net_device *phys_dev; /* device with ethtool_ops */
|
||||
struct packet_type fcoe_packet_type;
|
||||
struct sk_buff_head fcoe_pending_queue;
|
||||
|
||||
u8 dest_addr[ETH_ALEN];
|
||||
u8 ctl_src_addr[ETH_ALEN];
|
||||
u8 data_src_addr[ETH_ALEN];
|
||||
/*
|
||||
* fcoe protocol address learning related stuff
|
||||
*/
|
||||
u16 flogi_oxid;
|
||||
u8 flogi_progress;
|
||||
u8 address_mode;
|
||||
};
|
||||
|
||||
static inline struct fcoe_softc *fcoe_softc(
|
||||
const struct fc_lport *lp)
|
||||
{
|
||||
return (struct fcoe_softc *)lport_priv(lp);
|
||||
}
|
||||
|
||||
static inline struct net_device *fcoe_netdev(
|
||||
const struct fc_lport *lp)
|
||||
{
|
||||
return fcoe_softc(lp)->real_dev;
|
||||
}
|
||||
|
||||
static inline struct fcoe_hdr *skb_fcoe_header(const struct sk_buff *skb)
|
||||
{
|
||||
return (struct fcoe_hdr *)skb_network_header(skb);
|
||||
}
|
||||
|
||||
static inline int skb_fcoe_offset(const struct sk_buff *skb)
|
||||
{
|
||||
return skb_network_offset(skb);
|
||||
}
|
||||
|
||||
static inline struct fc_frame_header *skb_fc_header(const struct sk_buff *skb)
|
||||
{
|
||||
return (struct fc_frame_header *)skb_transport_header(skb);
|
||||
}
|
||||
|
||||
static inline int skb_fc_offset(const struct sk_buff *skb)
|
||||
{
|
||||
return skb_transport_offset(skb);
|
||||
}
|
||||
|
||||
static inline void skb_reset_fc_header(struct sk_buff *skb)
|
||||
{
|
||||
skb_reset_network_header(skb);
|
||||
skb_set_transport_header(skb, skb_network_offset(skb) +
|
||||
sizeof(struct fcoe_hdr));
|
||||
}
|
||||
|
||||
static inline bool skb_fc_is_data(const struct sk_buff *skb)
|
||||
{
|
||||
return skb_fc_header(skb)->fh_r_ctl == FC_RCTL_DD_SOL_DATA;
|
||||
}
|
||||
|
||||
static inline bool skb_fc_is_cmd(const struct sk_buff *skb)
|
||||
{
|
||||
return skb_fc_header(skb)->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD;
|
||||
}
|
||||
|
||||
static inline bool skb_fc_has_exthdr(const struct sk_buff *skb)
|
||||
{
|
||||
return (skb_fc_header(skb)->fh_r_ctl == FC_RCTL_VFTH) ||
|
||||
(skb_fc_header(skb)->fh_r_ctl == FC_RCTL_IFRH) ||
|
||||
(skb_fc_header(skb)->fh_r_ctl == FC_RCTL_ENCH);
|
||||
}
|
||||
|
||||
static inline bool skb_fc_is_roff(const struct sk_buff *skb)
|
||||
{
|
||||
return skb_fc_header(skb)->fh_f_ctl[2] & FC_FC_REL_OFF;
|
||||
}
|
||||
|
||||
static inline u16 skb_fc_oxid(const struct sk_buff *skb)
|
||||
{
|
||||
return be16_to_cpu(skb_fc_header(skb)->fh_ox_id);
|
||||
}
|
||||
|
||||
static inline u16 skb_fc_rxid(const struct sk_buff *skb)
|
||||
{
|
||||
return be16_to_cpu(skb_fc_header(skb)->fh_rx_id);
|
||||
}
|
||||
|
||||
/* FIXME - DMA_BIDIRECTIONAL ? */
|
||||
#define skb_cb(skb) ((struct fcoe_rcv_info *)&((skb)->cb[0]))
|
||||
#define skb_cmd(skb) (skb_cb(skb)->fr_cmd)
|
||||
#define skb_dir(skb) (skb_cmd(skb)->sc_data_direction)
|
||||
static inline bool skb_fc_is_read(const struct sk_buff *skb)
|
||||
{
|
||||
if (skb_fc_is_cmd(skb) && skb_cmd(skb))
|
||||
return skb_dir(skb) == DMA_FROM_DEVICE;
|
||||
return false;
|
||||
}
|
||||
|
||||
static inline bool skb_fc_is_write(const struct sk_buff *skb)
|
||||
{
|
||||
if (skb_fc_is_cmd(skb) && skb_cmd(skb))
|
||||
return skb_dir(skb) == DMA_TO_DEVICE;
|
||||
return false;
|
||||
}
|
||||
|
||||
/* libfcoe funcs */
|
||||
int fcoe_reset(struct Scsi_Host *shost);
|
||||
u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN],
|
||||
unsigned int scheme, unsigned int port);
|
||||
|
||||
u32 fcoe_fc_crc(struct fc_frame *fp);
|
||||
int fcoe_xmit(struct fc_lport *, struct fc_frame *);
|
||||
int fcoe_rcv(struct sk_buff *, struct net_device *,
|
||||
struct packet_type *, struct net_device *);
|
||||
|
||||
int fcoe_percpu_receive_thread(void *arg);
|
||||
void fcoe_clean_pending_queue(struct fc_lport *lp);
|
||||
void fcoe_percpu_clean(struct fc_lport *lp);
|
||||
void fcoe_watchdog(ulong vp);
|
||||
int fcoe_link_ok(struct fc_lport *lp);
|
||||
|
||||
struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
|
||||
int fcoe_hostlist_add(const struct fc_lport *);
|
||||
int fcoe_hostlist_remove(const struct fc_lport *);
|
||||
|
||||
struct Scsi_Host *fcoe_host_alloc(struct scsi_host_template *, int);
|
||||
int fcoe_libfc_config(struct fc_lport *, struct libfc_function_template *);
|
||||
|
||||
/* fcoe sw hba */
|
||||
int __init fcoe_sw_init(void);
|
||||
int __exit fcoe_sw_exit(void);
|
||||
#endif /* _LIBFCOE_H */
|
||||
Loading…
Reference in New Issue