[SCSI] fcoe: removes fc_transport_fcoe.[ch] code files

Remove unused fc_transport_fcoe.c and fc_transport_fcoe.h
files.
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/fcoe/fc_transport_fcoe.c

-/*
- * 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
- */
-
-#include <linux/pci.h>
-#include <scsi/libfcoe.h>
-#include <scsi/fc_transport_fcoe.h>
-
-/* internal fcoe transport */
-struct fcoe_transport_internal {
-	struct fcoe_transport *t;
-	struct net_device *netdev;
-	struct list_head list;
-};
-
-/* fcoe transports list and its lock */
-static LIST_HEAD(fcoe_transports);
-static DEFINE_MUTEX(fcoe_transports_lock);
-
-/**
- * fcoe_transport_default() - Returns ptr to the default transport fcoe_sw
- */
-struct fcoe_transport *fcoe_transport_default(void)
-{
-	return &fcoe_sw_transport;
-}
-
-/**
- * fcoe_transport_to_pcidev() - get the pci dev from a netdev
- * @netdev: the netdev that pci dev will be retrived from
- *
- * Returns: NULL or the corrsponding pci_dev
- */
-struct pci_dev *fcoe_transport_pcidev(const struct net_device *netdev)
-{
-	if (!netdev->dev.parent)
-		return NULL;
-	return to_pci_dev(netdev->dev.parent);
-}
-
-/**
- * fcoe_transport_device_lookup() - Lookup a transport
- * @netdev: the netdev the transport to be attached to
- *
- * This will look for existing offload driver, if not found, it falls back to
- * the default sw hba (fcoe_sw) as its fcoe transport.
- *
- * Returns: 0 for success
- */
-static struct fcoe_transport_internal *
-fcoe_transport_device_lookup(struct fcoe_transport *t,
-			     struct net_device *netdev)
-{
-	struct fcoe_transport_internal *ti;
-
-	/* assign the transpor to this device */
-	mutex_lock(&t->devlock);
-	list_for_each_entry(ti, &t->devlist, list) {
-		if (ti->netdev == netdev) {
-			mutex_unlock(&t->devlock);
-			return ti;
-		}
-	}
-	mutex_unlock(&t->devlock);
-	return NULL;
-}
-/**
- * fcoe_transport_device_add() - Assign a transport to a device
- * @netdev: the netdev the transport to be attached to
- *
- * This will look for existing offload driver, if not found, it falls back to
- * the default sw hba (fcoe_sw) as its fcoe transport.
- *
- * Returns: 0 for success
- */
-static int fcoe_transport_device_add(struct fcoe_transport *t,
-				     struct net_device *netdev)
-{
-	struct fcoe_transport_internal *ti;
-
-	ti = fcoe_transport_device_lookup(t, netdev);
-	if (ti) {
-		printk(KERN_DEBUG "fcoe_transport_device_add:"
-		       "device %s is already added to transport %s\n",
-		       netdev->name, t->name);
-		return -EEXIST;
-	}
-	/* allocate an internal struct to host the netdev and the list */
-	ti = kzalloc(sizeof(*ti), GFP_KERNEL);
-	if (!ti)
-		return -ENOMEM;
-
-	ti->t = t;
-	ti->netdev = netdev;
-	INIT_LIST_HEAD(&ti->list);
-	dev_hold(ti->netdev);
-
-	mutex_lock(&t->devlock);
-	list_add(&ti->list, &t->devlist);
-	mutex_unlock(&t->devlock);
-
-	printk(KERN_DEBUG "fcoe_transport_device_add:"
-		       "device %s added to transport %s\n",
-		       netdev->name, t->name);
-
-	return 0;
-}
-
-/**
- * fcoe_transport_device_remove() - Remove a device from its transport
- * @netdev: the netdev the transport to be attached to
- *
- * This removes the device from the transport so the given transport will
- * not manage this device any more
- *
- * Returns: 0 for success
- */
-static int fcoe_transport_device_remove(struct fcoe_transport *t,
-					struct net_device *netdev)
-{
-	struct fcoe_transport_internal *ti;
-
-	ti = fcoe_transport_device_lookup(t, netdev);
-	if (!ti) {
-		printk(KERN_DEBUG "fcoe_transport_device_remove:"
-		       "device %s is not managed by transport %s\n",
-		       netdev->name, t->name);
-		return -ENODEV;
-	}
-	mutex_lock(&t->devlock);
-	list_del(&ti->list);
-	mutex_unlock(&t->devlock);
-	printk(KERN_DEBUG "fcoe_transport_device_remove:"
-	       "device %s removed from transport %s\n",
-	       netdev->name, t->name);
-	dev_put(ti->netdev);
-	kfree(ti);
-	return 0;
-}
-
-/**
- * fcoe_transport_device_remove_all() - Remove all from transport devlist
- *
- * This removes the device from the transport so the given transport will
- * not manage this device any more
- *
- * Returns: 0 for success
- */
-static void fcoe_transport_device_remove_all(struct fcoe_transport *t)
-{
-	struct fcoe_transport_internal *ti, *tmp;
-
-	mutex_lock(&t->devlock);
-	list_for_each_entry_safe(ti, tmp, &t->devlist, list) {
-		list_del(&ti->list);
-		kfree(ti);
-	}
-	mutex_unlock(&t->devlock);
-}
-
-/**
- * fcoe_transport_match() - Use the bus device match function to match the hw
- * @t: The fcoe transport to check
- * @netdev: The netdev to match against
- *
- * This function is used to check if the given transport wants to manage the
- * input netdev. if the transports implements the match function, it will be
- * called, o.w. we just compare the pci vendor and device id.
- *
- * Returns: true for match up
- */
-static bool fcoe_transport_match(struct fcoe_transport *t,
-				 struct net_device *netdev)
-{
-	/* match transport by vendor and device id */
-	struct pci_dev *pci;
-
-	pci = fcoe_transport_pcidev(netdev);
-
-	if (pci) {
-		printk(KERN_DEBUG "fcoe_transport_match:"
-		       "%s:%x:%x -- %s:%x:%x\n",
-		       t->name, t->vendor, t->device,
-		       netdev->name, pci->vendor, pci->device);
-
-		/* if transport supports match */
-		if (t->match)
-			return t->match(netdev);
-
-		/* else just compare the vendor and device id: pci only */
-		return (t->vendor == pci->vendor) && (t->device == pci->device);
-	}
-	return false;
-}
-
-/**
- * fcoe_transport_lookup() - Check if the transport is already registered
- * @t: the transport to be looked up
- *
- * This compares the parent device (pci) vendor and device id
- *
- * Returns: NULL if not found
- *
- * TODO: return default sw transport if no other transport is found
- */
-static struct fcoe_transport *
-fcoe_transport_lookup(struct net_device *netdev)
-{
-	struct fcoe_transport *t;
-
-	mutex_lock(&fcoe_transports_lock);
-	list_for_each_entry(t, &fcoe_transports, list) {
-		if (fcoe_transport_match(t, netdev)) {
-			mutex_unlock(&fcoe_transports_lock);
-			return t;
-		}
-	}
-	mutex_unlock(&fcoe_transports_lock);
-
-	printk(KERN_DEBUG "fcoe_transport_lookup:"
-	       "use default transport for %s\n", netdev->name);
-	return fcoe_transport_default();
-}
-
-/**
- * fcoe_transport_register() - Adds a fcoe transport to the fcoe transports list
- * @t: ptr to the fcoe transport to be added
- *
- * Returns: 0 for success
- */
-int fcoe_transport_register(struct fcoe_transport *t)
-{
-	struct fcoe_transport *tt;
-
-	/* TODO - add fcoe_transport specific initialization here */
-	mutex_lock(&fcoe_transports_lock);
-	list_for_each_entry(tt, &fcoe_transports, list) {
-		if (tt == t) {
-			mutex_unlock(&fcoe_transports_lock);
-			return -EEXIST;
-		}
-	}
-	list_add_tail(&t->list, &fcoe_transports);
-	mutex_unlock(&fcoe_transports_lock);
-
-	printk(KERN_DEBUG "fcoe_transport_register:%s\n", t->name);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(fcoe_transport_register);
-
-/**
- * fcoe_transport_unregister() - Remove the tranport fro the fcoe transports list
- * @t: ptr to the fcoe transport to be removed
- *
- * Returns: 0 for success
- */
-int fcoe_transport_unregister(struct fcoe_transport *t)
-{
-	struct fcoe_transport *tt, *tmp;
-
-	mutex_lock(&fcoe_transports_lock);
-	list_for_each_entry_safe(tt, tmp, &fcoe_transports, list) {
-		if (tt == t) {
-			list_del(&t->list);
-			mutex_unlock(&fcoe_transports_lock);
-			fcoe_transport_device_remove_all(t);
-			printk(KERN_DEBUG "fcoe_transport_unregister:%s\n",
-			       t->name);
-			return 0;
-		}
-	}
-	mutex_unlock(&fcoe_transports_lock);
-	return -ENODEV;
-}
-EXPORT_SYMBOL_GPL(fcoe_transport_unregister);
-
-/**
- * fcoe_load_transport_driver() - Load an offload driver by alias name
- * @netdev: the target net device
- *
- * Requests for an offload driver module as the fcoe transport, if fails, it
- * falls back to use the SW HBA (fcoe_sw) as its transport
- *
- * TODO -
- * 	1. supports only PCI device
- * 	2. needs fix for VLAn and bonding
- * 	3. pure hw fcoe hba may not have netdev
- *
- * Returns: 0 for success
- */
-int fcoe_load_transport_driver(struct net_device *netdev)
-{
-	struct pci_dev *pci;
-	struct device *dev = netdev->dev.parent;
-
-	if (fcoe_transport_lookup(netdev)) {
-		/* load default transport */
-		printk(KERN_DEBUG "fcoe: already loaded transport for %s\n",
-		       netdev->name);
-		return -EEXIST;
-	}
-
-	pci = to_pci_dev(dev);
-	if (dev->bus != &pci_bus_type) {
-		printk(KERN_DEBUG "fcoe: support noly PCI device\n");
-		return -ENODEV;
-	}
-	printk(KERN_DEBUG "fcoe: loading driver fcoe-pci-0x%04x-0x%04x\n",
-	       pci->vendor, pci->device);
-
-	return request_module("fcoe-pci-0x%04x-0x%04x",
-			      pci->vendor, pci->device);
-
-}
-EXPORT_SYMBOL_GPL(fcoe_load_transport_driver);
-
-/**
- * fcoe_transport_attach() - Load transport to fcoe
- * @netdev: the netdev the transport to be attached to
- *
- * This will look for existing offload driver, if not found, it falls back to
- * the default sw hba (fcoe_sw) as its fcoe transport.
- *
- * Returns: 0 for success
- */
-int fcoe_transport_attach(struct net_device *netdev)
-{
-	struct fcoe_transport *t;
-
-	/* find the corresponding transport */
-	t = fcoe_transport_lookup(netdev);
-	if (!t) {
-		printk(KERN_DEBUG "fcoe_transport_attach"
-		       ":no transport for %s:use %s\n",
-		       netdev->name, t->name);
-		return -ENODEV;
-	}
-	/* add to the transport */
-	if (fcoe_transport_device_add(t, netdev)) {
-		printk(KERN_DEBUG "fcoe_transport_attach"
-		       ":failed to add %s to tramsport %s\n",
-		       netdev->name, t->name);
-		return -EIO;
-	}
-	/* transport create function */
-	if (t->create)
-		t->create(netdev);
-
-	printk(KERN_DEBUG "fcoe_transport_attach:transport %s for %s\n",
-	       t->name, netdev->name);
-	return 0;
-}
-EXPORT_SYMBOL_GPL(fcoe_transport_attach);
-
-/**
- * fcoe_transport_release() - Unload transport from fcoe
- * @netdev: the net device on which fcoe is to be released
- *
- * Returns: 0 for success
- */
-int fcoe_transport_release(struct net_device *netdev)
-{
-	struct fcoe_transport *t;
-
-	/* find the corresponding transport */
-	t = fcoe_transport_lookup(netdev);
-	if (!t) {
-		printk(KERN_DEBUG "fcoe_transport_release:"
-		       "no transport for %s:use %s\n",
-		       netdev->name, t->name);
-		return -ENODEV;
-	}
-	/* remove the device from the transport */
-	if (fcoe_transport_device_remove(t, netdev)) {
-		printk(KERN_DEBUG "fcoe_transport_release:"
-		       "failed to add %s to tramsport %s\n",
-		       netdev->name, t->name);
-		return -EIO;
-	}
-	/* transport destroy function */
-	if (t->destroy)
-		t->destroy(netdev);
-
-	printk(KERN_DEBUG "fcoe_transport_release:"
-	       "device %s dettached from transport %s\n",
-	       netdev->name, t->name);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(fcoe_transport_release);
-
-/**
- * fcoe_transport_init() - Initializes fcoe transport layer
- *
- * This prepares for the fcoe transport layer
- *
- * Returns: none
- */
-int __init fcoe_transport_init(void)
-{
-	INIT_LIST_HEAD(&fcoe_transports);
-	mutex_init(&fcoe_transports_lock);
-	return 0;
-}
-
-/**
- * fcoe_transport_exit() - Cleans up the fcoe transport layer
- *
- * This cleans up the fcoe transport layer. removing any transport on the list,
- * note that the transport destroy func is not called here.
- *
- * Returns: none
- */
-int __exit fcoe_transport_exit(void)
-{
-	struct fcoe_transport *t, *tmp;
-
-	mutex_lock(&fcoe_transports_lock);
-	list_for_each_entry_safe(t, tmp, &fcoe_transports, list) {
-		list_del(&t->list);
-		mutex_unlock(&fcoe_transports_lock);
-		fcoe_transport_device_remove_all(t);
-		mutex_lock(&fcoe_transports_lock);
-	}
-	mutex_unlock(&fcoe_transports_lock);
-	return 0;
-}

include/scsi/fc_transport_fcoe.h

-#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 */