+++ /dev/null
-/*
- * 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/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_up = 0;
- lp->qfull = 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);
-
- /* offload related configuration */
- lp->crc_offload = 0;
- lp->seq_offload = 0;
- lp->lro_enabled = 0;
- lp->lro_xid = 0;
- lp->lso_max = 0;
-
- return 0;
-}
-
-/**
- * fcoe_sw_netdev_config() - Set up netdev for SW FCoE
- * @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;
-
- if (!fcoe_link_ok(lp))
- lp->link_up = 1;
-
- /* offload features support */
- if (fc->real_dev->features & NETIF_F_SG)
- lp->sg_supp = 1;
-
-#ifdef NETIF_F_FCOE_CRC
- if (netdev->features & NETIF_F_FCOE_CRC) {
- lp->crc_offload = 1;
- printk(KERN_DEBUG "fcoe:%s supports FCCRC offload\n",
- netdev->name);
- }
-#endif
-#ifdef NETIF_F_FSO
- if (netdev->features & NETIF_F_FSO) {
- lp->seq_offload = 1;
- lp->lso_max = netdev->gso_max_size;
- printk(KERN_DEBUG "fcoe:%s supports LSO for max len 0x%x\n",
- netdev->name, lp->lso_max);
- }
-#endif
- if (netdev->fcoe_ddp_xid) {
- lp->lro_enabled = 1;
- lp->lro_xid = netdev->fcoe_ddp_xid;
- printk(KERN_DEBUG "fcoe:%s supports LRO for max xid 0x%x\n",
- netdev->name, lp->lro_xid);
- }
- skb_queue_head_init(&fc->fcoe_pending_queue);
- fc->fcoe_pending_queue_active = 0;
-
- /* 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 = lport_priv(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;
-}
-
-/*
- * fcoe_sw_ddp_setup - calls LLD's ddp_setup through net_device
- * @lp: the corresponding fc_lport
- * @xid: the exchange id for this ddp transfer
- * @sgl: the scatterlist describing this transfer
- * @sgc: number of sg items
- *
- * Returns : 0 no ddp
- */
-static int fcoe_sw_ddp_setup(struct fc_lport *lp, u16 xid,
- struct scatterlist *sgl, unsigned int sgc)
-{
- struct net_device *n = fcoe_netdev(lp);
-
- if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_setup)
- return n->netdev_ops->ndo_fcoe_ddp_setup(n, xid, sgl, sgc);
-
- return 0;
-}
-
-/*
- * fcoe_sw_ddp_done - calls LLD's ddp_done through net_device
- * @lp: the corresponding fc_lport
- * @xid: the exchange id for this ddp transfer
- *
- * Returns : the length of data that have been completed by ddp
- */
-static int fcoe_sw_ddp_done(struct fc_lport *lp, u16 xid)
-{
- struct net_device *n = fcoe_netdev(lp);
-
- if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_done)
- return n->netdev_ops->ndo_fcoe_ddp_done(n, xid);
- return 0;
-}
-
-static struct libfc_function_template fcoe_sw_libfc_fcn_templ = {
- .frame_send = fcoe_xmit,
- .ddp_setup = fcoe_sw_ddp_setup,
- .ddp_done = fcoe_sw_ddp_done,
-};
-
-/**
- * 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;
- }
-
- mutex_init(&fcoe_sw_transport.devlock);
- INIT_LIST_HEAD(&fcoe_sw_transport.devlist);
-
- /* 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;
-}
projects / linux-2.6-omap-h63xx.git / blobdiff