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[SCSI] fcoe: removes fc_transport_fcoe.[ch] code files
Remove unused fc_transport_fcoe.c and fc_transport_fcoe.h files. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Vasu Dev
James Bottomley
parent
5919a59503
commit
61e17afa89
@ -1,443 +0,0 @@
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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() - Lookup a transport
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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 *
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fcoe_transport_device_lookup(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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/* 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 to check
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* @netdev: The netdev to match against
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*
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* This function is used to check if the given 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 *
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fcoe_transport_lookup(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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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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*
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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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@ -1,54 +0,0 @@
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#ifndef FC_TRANSPORT_FCOE_H
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#define FC_TRANSPORT_FCOE_H
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#include <linux/device.h>
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#include <linux/netdevice.h>
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#include <scsi/scsi_host.h>
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#include <scsi/libfc.h>
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/**
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* struct fcoe_transport - FCoE transport struct for generic transport
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* for Ethernet devices as well as pure HBAs
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*
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* @name: name for thsi transport
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* @bus: physical bus type (pci_bus_type)
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* @driver: physical bus driver for network device
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* @create: entry create function
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* @destroy: exit destroy function
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* @list: list of transports
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*/
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struct fcoe_transport {
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char *name;
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unsigned short vendor;
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unsigned short device;
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struct bus_type *bus;
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struct device_driver *driver;
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int (*create)(struct net_device *device);
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int (*destroy)(struct net_device *device);
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bool (*match)(struct net_device *device);
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struct list_head list;
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struct list_head devlist;
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struct mutex devlock;
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};
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/**
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* MODULE_ALIAS_FCOE_PCI
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*
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* some care must be taken with this, vendor and device MUST be a hex value
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* preceded with 0x and with letters in lower case (0x12ab, not 0x12AB or 12AB)
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*/
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#define MODULE_ALIAS_FCOE_PCI(vendor, device) \
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MODULE_ALIAS("fcoe-pci-" __stringify(vendor) "-" __stringify(device))
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/* 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 */
|
||||
Loading…
Reference in New Issue
Block a user