diff options
Diffstat (limited to 'drivers/scsi/fcoe/fcoe_sw.c')
| -rw-r--r-- | drivers/scsi/fcoe/fcoe_sw.c | 561 |
1 files changed, 0 insertions, 561 deletions
diff --git a/drivers/scsi/fcoe/fcoe_sw.c b/drivers/scsi/fcoe/fcoe_sw.c deleted file mode 100644 index 2bbbe3c0cc7b..000000000000 --- a/drivers/scsi/fcoe/fcoe_sw.c +++ /dev/null @@ -1,561 +0,0 @@ -/* - * 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; -} |