495 строки
12 KiB
C
495 строки
12 KiB
C
/*
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* Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Maintained at www.Open-FCoE.org
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*/
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#include <linux/module.h>
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#include <linux/version.h>
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#include <linux/kernel.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/spinlock.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/if_vlan.h>
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#include <net/rtnetlink.h>
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#include <scsi/fc/fc_els.h>
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#include <scsi/fc/fc_encaps.h>
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#include <scsi/fc/fc_fs.h>
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#include <scsi/scsi_transport.h>
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#include <scsi/scsi_transport_fc.h>
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#include <scsi/libfc.h>
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#include <scsi/libfcoe.h>
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#include <scsi/fc_transport_fcoe.h>
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#define FCOE_SW_VERSION "0.1"
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#define FCOE_SW_NAME "fcoesw"
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#define FCOE_SW_VENDOR "Open-FCoE.org"
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#define FCOE_MAX_LUN 255
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#define FCOE_MAX_FCP_TARGET 256
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#define FCOE_MAX_OUTSTANDING_COMMANDS 1024
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#define FCOE_MIN_XID 0x0001 /* the min xid supported by fcoe_sw */
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#define FCOE_MAX_XID 0x07ef /* the max xid supported by fcoe_sw */
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static struct scsi_transport_template *scsi_transport_fcoe_sw;
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struct fc_function_template fcoe_sw_transport_function = {
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.show_host_node_name = 1,
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.show_host_port_name = 1,
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.show_host_supported_classes = 1,
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.show_host_supported_fc4s = 1,
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.show_host_active_fc4s = 1,
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.show_host_maxframe_size = 1,
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.show_host_port_id = 1,
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.show_host_supported_speeds = 1,
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.get_host_speed = fc_get_host_speed,
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.show_host_speed = 1,
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.show_host_port_type = 1,
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.get_host_port_state = fc_get_host_port_state,
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.show_host_port_state = 1,
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.show_host_symbolic_name = 1,
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.dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
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.show_rport_maxframe_size = 1,
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.show_rport_supported_classes = 1,
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.show_host_fabric_name = 1,
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.show_starget_node_name = 1,
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.show_starget_port_name = 1,
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.show_starget_port_id = 1,
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.set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
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.show_rport_dev_loss_tmo = 1,
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.get_fc_host_stats = fc_get_host_stats,
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.issue_fc_host_lip = fcoe_reset,
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.terminate_rport_io = fc_rport_terminate_io,
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};
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static struct scsi_host_template fcoe_sw_shost_template = {
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.module = THIS_MODULE,
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.name = "FCoE Driver",
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.proc_name = FCOE_SW_NAME,
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.queuecommand = fc_queuecommand,
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.eh_abort_handler = fc_eh_abort,
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.eh_device_reset_handler = fc_eh_device_reset,
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.eh_host_reset_handler = fc_eh_host_reset,
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.slave_alloc = fc_slave_alloc,
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.change_queue_depth = fc_change_queue_depth,
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.change_queue_type = fc_change_queue_type,
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.this_id = -1,
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.cmd_per_lun = 32,
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.can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
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.use_clustering = ENABLE_CLUSTERING,
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.sg_tablesize = SG_ALL,
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.max_sectors = 0xffff,
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};
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/*
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* fcoe_sw_lport_config - sets up the fc_lport
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* @lp: ptr to the fc_lport
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* @shost: ptr to the parent scsi host
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*
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* Returns: 0 for success
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*
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*/
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static int fcoe_sw_lport_config(struct fc_lport *lp)
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{
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int i = 0;
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lp->link_status = 0;
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lp->max_retry_count = 3;
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lp->e_d_tov = 2 * 1000; /* FC-FS default */
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lp->r_a_tov = 2 * 2 * 1000;
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lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
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FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
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/*
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* allocate per cpu stats block
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*/
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for_each_online_cpu(i)
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lp->dev_stats[i] = kzalloc(sizeof(struct fcoe_dev_stats),
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GFP_KERNEL);
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/* lport fc_lport related configuration */
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fc_lport_config(lp);
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return 0;
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}
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/*
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* fcoe_sw_netdev_config - sets up fcoe_softc for lport and network
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* related properties
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* @lp : ptr to the fc_lport
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* @netdev : ptr to the associated netdevice struct
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*
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* Must be called after fcoe_sw_lport_config() as it will use lport mutex
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*
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* Returns : 0 for success
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*
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*/
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static int fcoe_sw_netdev_config(struct fc_lport *lp, struct net_device *netdev)
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{
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u32 mfs;
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u64 wwnn, wwpn;
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struct fcoe_softc *fc;
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u8 flogi_maddr[ETH_ALEN];
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/* Setup lport private data to point to fcoe softc */
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fc = lport_priv(lp);
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fc->lp = lp;
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fc->real_dev = netdev;
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fc->phys_dev = netdev;
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/* Require support for get_pauseparam ethtool op. */
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if (netdev->priv_flags & IFF_802_1Q_VLAN)
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fc->phys_dev = vlan_dev_real_dev(netdev);
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/* Do not support for bonding device */
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if ((fc->real_dev->priv_flags & IFF_MASTER_ALB) ||
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(fc->real_dev->priv_flags & IFF_SLAVE_INACTIVE) ||
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(fc->real_dev->priv_flags & IFF_MASTER_8023AD)) {
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return -EOPNOTSUPP;
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}
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/*
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* Determine max frame size based on underlying device and optional
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* user-configured limit. If the MFS is too low, fcoe_link_ok()
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* will return 0, so do this first.
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*/
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mfs = fc->real_dev->mtu - (sizeof(struct fcoe_hdr) +
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sizeof(struct fcoe_crc_eof));
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if (fc_set_mfs(lp, mfs))
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return -EINVAL;
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lp->link_status = ~FC_PAUSE & ~FC_LINK_UP;
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if (!fcoe_link_ok(lp))
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lp->link_status |= FC_LINK_UP;
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/* offload features support */
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if (fc->real_dev->features & NETIF_F_SG)
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lp->sg_supp = 1;
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skb_queue_head_init(&fc->fcoe_pending_queue);
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/* setup Source Mac Address */
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memcpy(fc->ctl_src_addr, fc->real_dev->dev_addr,
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fc->real_dev->addr_len);
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wwnn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 1, 0);
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fc_set_wwnn(lp, wwnn);
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/* XXX - 3rd arg needs to be vlan id */
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wwpn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 2, 0);
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fc_set_wwpn(lp, wwpn);
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/*
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* Add FCoE MAC address as second unicast MAC address
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* or enter promiscuous mode if not capable of listening
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* for multiple unicast MACs.
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*/
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rtnl_lock();
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memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
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dev_unicast_add(fc->real_dev, flogi_maddr, ETH_ALEN);
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rtnl_unlock();
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/*
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* setup the receive function from ethernet driver
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* on the ethertype for the given device
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*/
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fc->fcoe_packet_type.func = fcoe_rcv;
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fc->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
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fc->fcoe_packet_type.dev = fc->real_dev;
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dev_add_pack(&fc->fcoe_packet_type);
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return 0;
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}
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/*
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* fcoe_sw_shost_config - sets up fc_lport->host
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* @lp : ptr to the fc_lport
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* @shost : ptr to the associated scsi host
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* @dev : device associated to scsi host
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*
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* Must be called after fcoe_sw_lport_config) and fcoe_sw_netdev_config()
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*
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* Returns : 0 for success
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*
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*/
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static int fcoe_sw_shost_config(struct fc_lport *lp, struct Scsi_Host *shost,
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struct device *dev)
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{
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int rc = 0;
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/* lport scsi host config */
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lp->host = shost;
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lp->host->max_lun = FCOE_MAX_LUN;
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lp->host->max_id = FCOE_MAX_FCP_TARGET;
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lp->host->max_channel = 0;
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lp->host->transportt = scsi_transport_fcoe_sw;
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/* add the new host to the SCSI-ml */
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rc = scsi_add_host(lp->host, dev);
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if (rc) {
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FC_DBG("fcoe_sw_shost_config:error on scsi_add_host\n");
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return rc;
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}
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sprintf(fc_host_symbolic_name(lp->host), "%s v%s over %s",
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FCOE_SW_NAME, FCOE_SW_VERSION,
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fcoe_netdev(lp)->name);
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return 0;
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}
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/*
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* fcoe_sw_em_config - allocates em for this lport
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* @lp: the port that em is to allocated for
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*
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* Returns : 0 on success
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*/
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static inline int fcoe_sw_em_config(struct fc_lport *lp)
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{
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BUG_ON(lp->emp);
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lp->emp = fc_exch_mgr_alloc(lp, FC_CLASS_3,
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FCOE_MIN_XID, FCOE_MAX_XID);
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if (!lp->emp)
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return -ENOMEM;
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return 0;
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}
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/*
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* fcoe_sw_destroy - FCoE software HBA tear-down function
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* @netdev: ptr to the associated net_device
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*
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* Returns: 0 if link is OK for use by FCoE.
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*/
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static int fcoe_sw_destroy(struct net_device *netdev)
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{
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int cpu;
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struct fc_lport *lp = NULL;
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struct fcoe_softc *fc;
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u8 flogi_maddr[ETH_ALEN];
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BUG_ON(!netdev);
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printk(KERN_DEBUG "fcoe_sw_destroy:interface on %s\n",
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netdev->name);
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lp = fcoe_hostlist_lookup(netdev);
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if (!lp)
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return -ENODEV;
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fc = fcoe_softc(lp);
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/* Logout of the fabric */
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fc_fabric_logoff(lp);
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/* Remove the instance from fcoe's list */
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fcoe_hostlist_remove(lp);
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/* Don't listen for Ethernet packets anymore */
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dev_remove_pack(&fc->fcoe_packet_type);
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/* Cleanup the fc_lport */
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fc_lport_destroy(lp);
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fc_fcp_destroy(lp);
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/* Detach from the scsi-ml */
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fc_remove_host(lp->host);
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scsi_remove_host(lp->host);
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/* There are no more rports or I/O, free the EM */
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if (lp->emp)
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fc_exch_mgr_free(lp->emp);
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/* Delete secondary MAC addresses */
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rtnl_lock();
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memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
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dev_unicast_delete(fc->real_dev, flogi_maddr, ETH_ALEN);
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if (compare_ether_addr(fc->data_src_addr, (u8[6]) { 0 }))
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dev_unicast_delete(fc->real_dev, fc->data_src_addr, ETH_ALEN);
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rtnl_unlock();
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/* Free the per-CPU revieve threads */
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fcoe_percpu_clean(lp);
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/* Free existing skbs */
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fcoe_clean_pending_queue(lp);
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/* Free memory used by statistical counters */
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for_each_online_cpu(cpu)
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kfree(lp->dev_stats[cpu]);
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/* Release the net_device and Scsi_Host */
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dev_put(fc->real_dev);
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scsi_host_put(lp->host);
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return 0;
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}
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static struct libfc_function_template fcoe_sw_libfc_fcn_templ = {
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.frame_send = fcoe_xmit,
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};
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/*
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* fcoe_sw_create - this function creates the fcoe interface
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* @netdev: pointer the associated netdevice
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*
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* Creates fc_lport struct and scsi_host for lport, configures lport
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* and starts fabric login.
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*
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* Returns : 0 on success
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*/
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static int fcoe_sw_create(struct net_device *netdev)
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{
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int rc;
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struct fc_lport *lp = NULL;
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struct fcoe_softc *fc;
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struct Scsi_Host *shost;
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BUG_ON(!netdev);
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printk(KERN_DEBUG "fcoe_sw_create:interface on %s\n",
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netdev->name);
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lp = fcoe_hostlist_lookup(netdev);
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if (lp)
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return -EEXIST;
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shost = fcoe_host_alloc(&fcoe_sw_shost_template,
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sizeof(struct fcoe_softc));
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if (!shost) {
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FC_DBG("Could not allocate host structure\n");
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return -ENOMEM;
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}
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lp = shost_priv(shost);
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fc = lport_priv(lp);
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/* configure fc_lport, e.g., em */
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rc = fcoe_sw_lport_config(lp);
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if (rc) {
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FC_DBG("Could not configure lport\n");
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goto out_host_put;
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}
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/* configure lport network properties */
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rc = fcoe_sw_netdev_config(lp, netdev);
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if (rc) {
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FC_DBG("Could not configure netdev for lport\n");
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goto out_host_put;
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}
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/* configure lport scsi host properties */
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rc = fcoe_sw_shost_config(lp, shost, &netdev->dev);
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if (rc) {
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FC_DBG("Could not configure shost for lport\n");
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goto out_host_put;
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}
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/* lport exch manager allocation */
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rc = fcoe_sw_em_config(lp);
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if (rc) {
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FC_DBG("Could not configure em for lport\n");
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goto out_host_put;
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}
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/* Initialize the library */
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rc = fcoe_libfc_config(lp, &fcoe_sw_libfc_fcn_templ);
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if (rc) {
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FC_DBG("Could not configure libfc for lport!\n");
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goto out_lp_destroy;
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}
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/* add to lports list */
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fcoe_hostlist_add(lp);
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lp->boot_time = jiffies;
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fc_fabric_login(lp);
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dev_hold(netdev);
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return rc;
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out_lp_destroy:
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fc_exch_mgr_free(lp->emp); /* Free the EM */
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out_host_put:
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scsi_host_put(lp->host);
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return rc;
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}
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/*
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* fcoe_sw_match - the fcoe sw transport match function
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*
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* Returns : false always
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*/
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static bool fcoe_sw_match(struct net_device *netdev)
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{
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/* FIXME - for sw transport, always return false */
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return false;
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}
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/* the sw hba fcoe transport */
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struct fcoe_transport fcoe_sw_transport = {
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.name = "fcoesw",
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.create = fcoe_sw_create,
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.destroy = fcoe_sw_destroy,
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.match = fcoe_sw_match,
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.vendor = 0x0,
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.device = 0xffff,
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};
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/*
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* fcoe_sw_init - registers fcoe_sw_transport
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*
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* Returns : 0 on success
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*/
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int __init fcoe_sw_init(void)
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{
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/* attach to scsi transport */
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scsi_transport_fcoe_sw =
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fc_attach_transport(&fcoe_sw_transport_function);
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if (!scsi_transport_fcoe_sw) {
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printk(KERN_ERR "fcoe_sw_init:fc_attach_transport() failed\n");
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return -ENODEV;
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}
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/* register sw transport */
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fcoe_transport_register(&fcoe_sw_transport);
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return 0;
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}
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/*
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* fcoe_sw_exit - unregisters fcoe_sw_transport
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*
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* Returns : 0 on success
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*/
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int __exit fcoe_sw_exit(void)
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{
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/* dettach the transport */
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fc_release_transport(scsi_transport_fcoe_sw);
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fcoe_transport_unregister(&fcoe_sw_transport);
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return 0;
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}
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