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Message-ID: <20080610210244.11186.21580.stgit@dale>
Date: Tue, 10 Jun 2008 17:02:45 -0400
From: Ramachandra K <ramachandra.kuchimanchi@...gic.com>
To: rdreier@...co.com, general@...ts.openfabrics.org,
netdev@...r.kernel.org
Cc: poornima.kamath@...gic.com, amar.mudrankit@...gic.com
Subject: [PATCH v4 01/14] QLogic VNIC: Driver - netdev implementation
From: Ramachandra K <ramachandra.kuchimanchi@...gic.com>
QLogic Virtual NIC Driver. This patch implements netdev registration,
netdev functions and state maintenance of the QLogic Virtual NIC
corresponding to the various events associated with the QLogic Ethernet
Virtual I/O Controller (EVIC/VEx) connection.
Signed-off-by: Ramachandra K <ramachandra.kuchimanchi@...gic.com>
Signed-off-by: Poornima Kamath <poornima.kamath@...gic.com>
Signed-off-by: Amar Mudrankit <amar.mudrankit@...gic.com>
---
drivers/infiniband/ulp/qlgc_vnic/vnic_main.c | 1097 ++++++++++++++++++++++++++
drivers/infiniband/ulp/qlgc_vnic/vnic_main.h | 159 ++++
2 files changed, 1256 insertions(+), 0 deletions(-)
create mode 100644 drivers/infiniband/ulp/qlgc_vnic/vnic_main.c
create mode 100644 drivers/infiniband/ulp/qlgc_vnic/vnic_main.h
diff --git a/drivers/infiniband/ulp/qlgc_vnic/vnic_main.c b/drivers/infiniband/ulp/qlgc_vnic/vnic_main.c
new file mode 100644
index 0000000..665f7dc
--- /dev/null
+++ b/drivers/infiniband/ulp/qlgc_vnic/vnic_main.c
@@ -0,0 +1,1097 @@
+/*
+ * Copyright (c) 2006 QLogic, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/completion.h>
+
+#include "vnic_util.h"
+#include "vnic_main.h"
+#include "vnic_netpath.h"
+#include "vnic_viport.h"
+#include "vnic_ib.h"
+#include "vnic_stats.h"
+
+#define MODULEVERSION "1.3.0.0.4"
+#define MODULEDETAILS \
+ "QLogic Corp. Virtual NIC (VNIC) driver version " MODULEVERSION
+
+MODULE_AUTHOR("QLogic Corp.");
+MODULE_DESCRIPTION(MODULEDETAILS);
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_SUPPORTED_DEVICE("QLogic Ethernet Virtual I/O Controller");
+
+u32 vnic_debug;
+
+module_param(vnic_debug, uint, 0444);
+MODULE_PARM_DESC(vnic_debug, "Enable debug tracing if > 0");
+
+LIST_HEAD(vnic_list);
+
+static DECLARE_WAIT_QUEUE_HEAD(vnic_npevent_queue);
+static LIST_HEAD(vnic_npevent_list);
+static DECLARE_COMPLETION(vnic_npevent_thread_exit);
+static spinlock_t vnic_npevent_list_lock;
+static struct task_struct *vnic_npevent_thread;
+static int vnic_npevent_thread_end;
+
+static const char *const vnic_npevent_str[] = {
+ "PRIMARY CONNECTED",
+ "PRIMARY DISCONNECTED",
+ "PRIMARY CARRIER",
+ "PRIMARY NO CARRIER",
+ "PRIMARY TIMER EXPIRED",
+ "PRIMARY SETLINK",
+ "SECONDARY CONNECTED",
+ "SECONDARY DISCONNECTED",
+ "SECONDARY CARRIER",
+ "SECONDARY NO CARRIER",
+ "SECONDARY TIMER EXPIRED",
+ "SECONDARY SETLINK",
+ "FREE VNIC",
+};
+
+void vnic_connected(struct vnic *vnic, struct netpath *netpath)
+{
+ VNIC_FUNCTION("vnic_connected()\n");
+ if (netpath->second_bias)
+ vnic_npevent_queue_evt(netpath, VNIC_SECNP_CONNECTED);
+ else
+ vnic_npevent_queue_evt(netpath, VNIC_PRINP_CONNECTED);
+
+ vnic_connected_stats(vnic);
+}
+
+void vnic_disconnected(struct vnic *vnic, struct netpath *netpath)
+{
+ VNIC_FUNCTION("vnic_disconnected()\n");
+ if (netpath->second_bias)
+ vnic_npevent_queue_evt(netpath, VNIC_SECNP_DISCONNECTED);
+ else
+ vnic_npevent_queue_evt(netpath, VNIC_PRINP_DISCONNECTED);
+}
+
+void vnic_link_up(struct vnic *vnic, struct netpath *netpath)
+{
+ VNIC_FUNCTION("vnic_link_up()\n");
+ if (netpath->second_bias)
+ vnic_npevent_queue_evt(netpath, VNIC_SECNP_LINKUP);
+ else
+ vnic_npevent_queue_evt(netpath, VNIC_PRINP_LINKUP);
+}
+
+void vnic_link_down(struct vnic *vnic, struct netpath *netpath)
+{
+ VNIC_FUNCTION("vnic_link_down()\n");
+ if (netpath->second_bias)
+ vnic_npevent_queue_evt(netpath, VNIC_SECNP_LINKDOWN);
+ else
+ vnic_npevent_queue_evt(netpath, VNIC_PRINP_LINKDOWN);
+}
+
+void vnic_stop_xmit(struct vnic *vnic, struct netpath *netpath)
+{
+ unsigned long flags;
+
+ VNIC_FUNCTION("vnic_stop_xmit()\n");
+ spin_lock_irqsave(&vnic->current_path_lock, flags);
+ if (netpath == vnic->current_path) {
+ if (!netif_queue_stopped(vnic->netdevice)) {
+ netif_stop_queue(vnic->netdevice);
+ vnic->failed_over = 0;
+ }
+
+ vnic_stop_xmit_stats(vnic);
+ }
+ spin_unlock_irqrestore(&vnic->current_path_lock, flags);
+}
+
+void vnic_restart_xmit(struct vnic *vnic, struct netpath *netpath)
+{
+ unsigned long flags;
+
+ VNIC_FUNCTION("vnic_restart_xmit()\n");
+ spin_lock_irqsave(&vnic->current_path_lock, flags);
+ if (netpath == vnic->current_path) {
+ if (netif_queue_stopped(vnic->netdevice))
+ netif_wake_queue(vnic->netdevice);
+
+ vnic_restart_xmit_stats(vnic);
+ }
+ spin_unlock_irqrestore(&vnic->current_path_lock, flags);
+}
+
+void vnic_recv_packet(struct vnic *vnic, struct netpath *netpath,
+ struct sk_buff *skb)
+{
+ VNIC_FUNCTION("vnic_recv_packet()\n");
+ if ((netpath != vnic->current_path) ||
+ !netif_running(vnic->netdevice)) {
+ VNIC_INFO("tossing packet\n");
+ dev_kfree_skb(skb);
+ return;
+ }
+
+ vnic->netdevice->last_rx = jiffies;
+ skb->dev = vnic->netdevice;
+ skb->protocol = eth_type_trans(skb, skb->dev);
+ if (!vnic->config->use_rx_csum)
+ skb->ip_summed = CHECKSUM_NONE;
+ netif_rx(skb);
+ vnic_recv_pkt_stats(vnic);
+}
+
+static struct net_device_stats *vnic_get_stats(struct net_device *device)
+{
+ struct vnic *vnic;
+ struct netpath *np;
+ unsigned long flags;
+
+ VNIC_FUNCTION("vnic_get_stats()\n");
+ vnic = netdev_priv(device);
+
+ spin_lock_irqsave(&vnic->current_path_lock, flags);
+ np = vnic->current_path;
+ if (np && np->viport) {
+ atomic_inc(&np->viport->reference_count);
+ spin_unlock_irqrestore(&vnic->current_path_lock, flags);
+ viport_get_stats(np->viport, &vnic->netdevice->stats);
+ atomic_dec(&np->viport->reference_count);
+ wake_up(&np->viport->reference_queue);
+ } else
+ spin_unlock_irqrestore(&vnic->current_path_lock, flags);
+
+ return &vnic->netdevice->stats;
+}
+
+static int vnic_open(struct net_device *device)
+{
+ struct vnic *vnic;
+
+ VNIC_FUNCTION("vnic_open()\n");
+ vnic = netdev_priv(device);
+
+ vnic_npevent_queue_evt(&vnic->primary_path, VNIC_PRINP_SETLINK);
+ netif_start_queue(vnic->netdevice);
+
+ return 0;
+}
+
+static int vnic_stop(struct net_device *device)
+{
+ struct vnic *vnic;
+ int ret = 0;
+
+ VNIC_FUNCTION("vnic_stop()\n");
+ vnic = netdev_priv(device);
+ netif_stop_queue(device);
+ vnic_npevent_queue_evt(&vnic->primary_path, VNIC_PRINP_SETLINK);
+
+ return ret;
+}
+
+static int vnic_hard_start_xmit(struct sk_buff *skb,
+ struct net_device *device)
+{
+ struct vnic *vnic;
+ struct netpath *np;
+ cycles_t xmit_time;
+ int ret = -1;
+
+ VNIC_FUNCTION("vnic_hard_start_xmit()\n");
+ vnic = netdev_priv(device);
+ np = vnic->current_path;
+
+ vnic_pre_pkt_xmit_stats(&xmit_time);
+
+ if (np && np->viport)
+ ret = viport_xmit_packet(np->viport, skb);
+
+ if (ret) {
+ vnic_xmit_fail_stats(vnic);
+ dev_kfree_skb_any(skb);
+ vnic->netdevice->stats.tx_dropped++;
+ goto out;
+ }
+
+ device->trans_start = jiffies;
+ vnic_post_pkt_xmit_stats(vnic, xmit_time);
+out:
+ return 0;
+}
+
+static void vnic_tx_timeout(struct net_device *device)
+{
+ struct vnic *vnic;
+ struct viport *viport = NULL;
+ unsigned long flags;
+
+ VNIC_FUNCTION("vnic_tx_timeout()\n");
+ vnic = netdev_priv(device);
+ device->trans_start = jiffies;
+
+ spin_lock_irqsave(&vnic->current_path_lock, flags);
+ if (vnic->current_path && vnic->current_path->viport) {
+ if (vnic->failed_over) {
+ if (vnic->current_path == &vnic->primary_path)
+ viport = vnic->secondary_path.viport;
+ else if (vnic->current_path == &vnic->secondary_path)
+ viport = vnic->primary_path.viport;
+ } else
+ viport = vnic->current_path->viport;
+
+ spin_unlock_irqrestore(&vnic->current_path_lock, flags);
+ if (viport)
+ viport_failure(viport);
+ } else
+ spin_unlock_irqrestore(&vnic->current_path_lock, flags);
+
+ VNIC_ERROR("vnic_tx_timeout\n");
+}
+
+static void vnic_set_multicast_list(struct net_device *device)
+{
+ struct vnic *vnic;
+ unsigned long flags;
+
+ VNIC_FUNCTION("vnic_set_multicast_list()\n");
+ vnic = netdev_priv(device);
+
+ spin_lock_irqsave(&vnic->lock, flags);
+ if (device->mc_count == 0) {
+ if (vnic->mc_list_len) {
+ vnic->mc_list_len = vnic->mc_count = 0;
+ kfree(vnic->mc_list);
+ }
+ } else {
+ struct dev_mc_list *mc_list = device->mc_list;
+ int i;
+
+ if (device->mc_count > vnic->mc_list_len) {
+ if (vnic->mc_list_len)
+ kfree(vnic->mc_list);
+ vnic->mc_list_len = device->mc_count + 10;
+ vnic->mc_list = kmalloc(vnic->mc_list_len *
+ sizeof *mc_list, GFP_ATOMIC);
+ if (!vnic->mc_list) {
+ vnic->mc_list_len = vnic->mc_count = 0;
+ VNIC_ERROR("failed allocating mc_list\n");
+ goto failure;
+ }
+ }
+ vnic->mc_count = device->mc_count;
+ for (i = 0; i < device->mc_count; i++) {
+ vnic->mc_list[i] = *mc_list;
+ vnic->mc_list[i].next = &vnic->mc_list[i + 1];
+ mc_list = mc_list->next;
+ }
+ }
+ spin_unlock_irqrestore(&vnic->lock, flags);
+
+ if (vnic->primary_path.viport)
+ viport_set_multicast(vnic->primary_path.viport,
+ vnic->mc_list, vnic->mc_count);
+
+ if (vnic->secondary_path.viport)
+ viport_set_multicast(vnic->secondary_path.viport,
+ vnic->mc_list, vnic->mc_count);
+
+ vnic_npevent_queue_evt(&vnic->primary_path, VNIC_PRINP_SETLINK);
+ return;
+failure:
+ spin_unlock_irqrestore(&vnic->lock, flags);
+}
+
+/**
+ * Following set of functions queues up the events for EVIC and the
+ * kernel thread queuing up the event might return.
+ */
+static int vnic_set_mac_address(struct net_device *device, void *addr)
+{
+ struct vnic *vnic;
+ struct sockaddr *sockaddr = addr;
+ u8 *address;
+ int ret = -1;
+
+ VNIC_FUNCTION("vnic_set_mac_address()\n");
+ vnic = netdev_priv(device);
+
+ if (!is_valid_ether_addr(sockaddr->sa_data))
+ return -EADDRNOTAVAIL;
+
+ if (netif_running(device))
+ return -EBUSY;
+
+ memcpy(device->dev_addr, sockaddr->sa_data, ETH_ALEN);
+ address = sockaddr->sa_data;
+
+ if (vnic->primary_path.viport)
+ ret = viport_set_unicast(vnic->primary_path.viport,
+ address);
+
+ if (ret)
+ return ret;
+
+ if (vnic->secondary_path.viport)
+ viport_set_unicast(vnic->secondary_path.viport, address);
+
+ vnic->mac_set = 1;
+ return 0;
+}
+
+static int vnic_change_mtu(struct net_device *device, int mtu)
+{
+ struct vnic *vnic;
+ int ret = 0;
+ int pri_max_mtu;
+ int sec_max_mtu;
+
+ VNIC_FUNCTION("vnic_change_mtu()\n");
+ vnic = netdev_priv(device);
+
+ if (vnic->primary_path.viport)
+ pri_max_mtu = viport_max_mtu(vnic->primary_path.viport);
+ else
+ pri_max_mtu = MAX_PARAM_VALUE;
+
+ if (vnic->secondary_path.viport)
+ sec_max_mtu = viport_max_mtu(vnic->secondary_path.viport);
+ else
+ sec_max_mtu = MAX_PARAM_VALUE;
+
+ if ((mtu < pri_max_mtu) && (mtu < sec_max_mtu)) {
+ device->mtu = mtu;
+ vnic_npevent_queue_evt(&vnic->primary_path,
+ VNIC_PRINP_SETLINK);
+ vnic_npevent_queue_evt(&vnic->secondary_path,
+ VNIC_SECNP_SETLINK);
+ } else if (pri_max_mtu < sec_max_mtu)
+ printk(KERN_WARNING PFX "%s: Maximum "
+ "supported MTU size is %d. "
+ "Cannot set MTU to %d\n",
+ vnic->config->name, pri_max_mtu, mtu);
+ else
+ printk(KERN_WARNING PFX "%s: Maximum "
+ "supported MTU size is %d. "
+ "Cannot set MTU to %d\n",
+ vnic->config->name, sec_max_mtu, mtu);
+
+ return ret;
+}
+
+static int vnic_npevent_register(struct vnic *vnic, struct netpath *netpath)
+{
+ u8 *address;
+ int ret;
+
+ if (!vnic->mac_set) {
+ /* if netpath == secondary_path, then the primary path isn't
+ * connected. MAC address will be set when the primary
+ * connects.
+ */
+ netpath_get_hw_addr(netpath, vnic->netdevice->dev_addr);
+ address = vnic->netdevice->dev_addr;
+
+ if (vnic->secondary_path.viport)
+ viport_set_unicast(vnic->secondary_path.viport,
+ address);
+
+ vnic->mac_set = 1;
+ }
+ ret = register_netdev(vnic->netdevice);
+ if (ret) {
+ printk(KERN_ERR PFX "%s failed registering netdev "
+ "error %d - calling viport_failure\n",
+ config_viport_name(vnic->primary_path.viport->config),
+ ret);
+ vnic_free(vnic);
+ printk(KERN_ERR PFX "%s DELETED : register_netdev failure\n",
+ config_viport_name(vnic->primary_path.viport->config));
+ return ret;
+ }
+
+ vnic->state = VNIC_REGISTERED;
+ vnic->carrier = 2; /*special value to force netif_carrier_(on|off)*/
+ return 0;
+}
+
+static void vnic_npevent_dequeue_all(struct vnic *vnic)
+{
+ unsigned long flags;
+ struct vnic_npevent *npevt, *tmp;
+
+ spin_lock_irqsave(&vnic_npevent_list_lock, flags);
+ if (list_empty(&vnic_npevent_list))
+ goto out;
+ list_for_each_entry_safe(npevt, tmp, &vnic_npevent_list,
+ list_ptrs) {
+ if ((npevt->vnic == vnic)) {
+ list_del(&npevt->list_ptrs);
+ kfree(npevt);
+ }
+ }
+out:
+ spin_unlock_irqrestore(&vnic_npevent_list_lock, flags);
+}
+
+static void update_path_and_reconnect(struct netpath *netpath,
+ struct vnic *vnic)
+{
+ struct viport_config *config = netpath->viport->config;
+ int delay = 1;
+
+ if (vnic_ib_get_path(netpath, vnic))
+ return;
+ /*
+ * tell viport_connect to wait for default_no_path_timeout
+ * before connecting if we are retrying the same path index
+ * within default_no_path_timeout.
+ * This prevents flooding connect requests to a path (or set
+ * of paths) that aren't successfully connecting for some reason.
+ */
+ if (time_after(jiffies,
+ (netpath->connect_time + vnic->config->no_path_timeout))) {
+ netpath->path_idx = config->path_idx;
+ netpath->connect_time = jiffies;
+ netpath->delay_reconnect = 0;
+ delay = 0;
+ } else if (config->path_idx != netpath->path_idx) {
+ delay = netpath->delay_reconnect;
+ netpath->path_idx = config->path_idx;
+ netpath->delay_reconnect = 1;
+ } else
+ delay = 1;
+ viport_connect(netpath->viport, delay);
+}
+
+static inline void vnic_set_checksum_flag(struct vnic *vnic,
+ struct netpath *target_path)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&vnic->current_path_lock, flags);
+ vnic->current_path = target_path;
+ vnic->failed_over = 1;
+ if (vnic->config->use_tx_csum &&
+ netpath_can_tx_csum(vnic->current_path))
+ vnic->netdevice->features |= NETIF_F_IP_CSUM;
+
+ spin_unlock_irqrestore(&vnic->current_path_lock, flags);
+}
+
+static void vnic_set_uni_multicast(struct vnic *vnic,
+ struct netpath *netpath)
+{
+ unsigned long flags;
+ u8 *address;
+
+ if (vnic->mac_set) {
+ address = vnic->netdevice->dev_addr;
+
+ if (netpath->viport)
+ viport_set_unicast(netpath->viport, address);
+ }
+ spin_lock_irqsave(&vnic->lock, flags);
+
+ if (vnic->mc_list && netpath->viport)
+ viport_set_multicast(netpath->viport, vnic->mc_list,
+ vnic->mc_count);
+
+ spin_unlock_irqrestore(&vnic->lock, flags);
+ if (vnic->state == VNIC_REGISTERED) {
+ if (!netpath->viport)
+ return;
+ viport_set_link(netpath->viport,
+ vnic->netdevice->flags & ~IFF_UP,
+ vnic->netdevice->mtu);
+ }
+}
+
+static void vnic_set_netpath_timers(struct vnic *vnic,
+ struct netpath *netpath)
+{
+ switch (netpath->timer_state) {
+ case NETPATH_TS_IDLE:
+ netpath->timer_state = NETPATH_TS_ACTIVE;
+ if (vnic->state == VNIC_UNINITIALIZED)
+ netpath_timer(netpath,
+ vnic->config->
+ primary_connect_timeout);
+ else
+ netpath_timer(netpath,
+ vnic->config->
+ primary_reconnect_timeout);
+ break;
+ case NETPATH_TS_ACTIVE:
+ /*nothing to do*/
+ break;
+ case NETPATH_TS_EXPIRED:
+ if (vnic->state == VNIC_UNINITIALIZED)
+ vnic_npevent_register(vnic, netpath);
+
+ break;
+ }
+}
+
+static void vnic_check_primary_path_timer(struct vnic *vnic)
+{
+ switch (vnic->primary_path.timer_state) {
+ case NETPATH_TS_ACTIVE:
+ /* nothing to do. just wait */
+ break;
+ case NETPATH_TS_IDLE:
+ netpath_timer(&vnic->primary_path,
+ vnic->config->
+ primary_switch_timeout);
+ break;
+ case NETPATH_TS_EXPIRED:
+ printk(KERN_INFO PFX
+ "%s: switching to primary path\n",
+ vnic->config->name);
+
+ vnic_set_checksum_flag(vnic, &vnic->primary_path);
+ break;
+ }
+}
+
+static void vnic_carrier_loss(struct vnic *vnic,
+ struct netpath *last_path)
+{
+ if (vnic->primary_path.carrier) {
+ vnic->carrier = 1;
+ vnic_set_checksum_flag(vnic, &vnic->primary_path);
+
+ if (last_path && last_path != vnic->current_path)
+ printk(KERN_INFO PFX
+ "%s: failing over to primary path\n",
+ vnic->config->name);
+ else if (!last_path)
+ printk(KERN_INFO PFX "%s: using primary path\n",
+ vnic->config->name);
+
+ } else if ((vnic->secondary_path.carrier) &&
+ (vnic->secondary_path.timer_state != NETPATH_TS_ACTIVE)) {
+ vnic->carrier = 1;
+ vnic_set_checksum_flag(vnic, &vnic->secondary_path);
+
+ if (last_path && last_path != vnic->current_path)
+ printk(KERN_INFO PFX
+ "%s: failing over to secondary path\n",
+ vnic->config->name);
+ else if (!last_path)
+ printk(KERN_INFO PFX "%s: using secondary path\n",
+ vnic->config->name);
+
+ }
+
+}
+
+static void vnic_handle_path_change(struct vnic *vnic,
+ struct netpath **path)
+{
+ struct netpath *last_path = *path;
+
+ if (!last_path) {
+ if (vnic->current_path == &vnic->primary_path)
+ last_path = &vnic->secondary_path;
+ else
+ last_path = &vnic->primary_path;
+
+ }
+
+ if (vnic->current_path && vnic->current_path->viport)
+ viport_set_link(vnic->current_path->viport,
+ vnic->netdevice->flags,
+ vnic->netdevice->mtu);
+
+ if (last_path->viport)
+ viport_set_link(last_path->viport,
+ vnic->netdevice->flags &
+ ~IFF_UP, vnic->netdevice->mtu);
+
+ vnic_restart_xmit(vnic, vnic->current_path);
+}
+
+static void vnic_report_path_change(struct vnic *vnic,
+ struct netpath *last_path,
+ int other_path_ok)
+{
+ if (!vnic->current_path) {
+ if (last_path == &vnic->primary_path)
+ printk(KERN_INFO PFX "%s: primary path lost, "
+ "no failover path available\n",
+ vnic->config->name);
+ else
+ printk(KERN_INFO PFX "%s: secondary path lost, "
+ "no failover path available\n",
+ vnic->config->name);
+ return;
+ }
+
+ if (last_path != vnic->current_path)
+ return;
+
+ if (vnic->current_path == &vnic->secondary_path) {
+ if (other_path_ok != vnic->primary_path.carrier) {
+ if (other_path_ok)
+ printk(KERN_INFO PFX "%s: primary path no"
+ " longer available for failover\n",
+ vnic->config->name);
+ else
+ printk(KERN_INFO PFX "%s: primary path now"
+ " available for failover\n",
+ vnic->config->name);
+ }
+ } else {
+ if (other_path_ok != vnic->secondary_path.carrier) {
+ if (other_path_ok)
+ printk(KERN_INFO PFX "%s: secondary path no"
+ " longer available for failover\n",
+ vnic->config->name);
+ else
+ printk(KERN_INFO PFX "%s: secondary path now"
+ " available for failover\n",
+ vnic->config->name);
+ }
+ }
+}
+
+static void vnic_handle_free_vnic_evt(struct vnic *vnic)
+{
+ unsigned long flags;
+
+ if (!netif_queue_stopped(vnic->netdevice))
+ netif_stop_queue(vnic->netdevice);
+
+ netpath_timer_stop(&vnic->primary_path);
+ netpath_timer_stop(&vnic->secondary_path);
+ spin_lock_irqsave(&vnic->current_path_lock, flags);
+ vnic->current_path = NULL;
+ spin_unlock_irqrestore(&vnic->current_path_lock, flags);
+ netpath_free(&vnic->primary_path);
+ netpath_free(&vnic->secondary_path);
+ if (vnic->state == VNIC_REGISTERED)
+ unregister_netdev(vnic->netdevice);
+
+ vnic_npevent_dequeue_all(vnic);
+ kfree(vnic->config);
+ if (vnic->mc_list_len) {
+ vnic->mc_list_len = vnic->mc_count = 0;
+ kfree(vnic->mc_list);
+ }
+
+ sysfs_remove_group(&vnic->dev_info.dev.kobj,
+ &vnic_dev_attr_group);
+ vnic_cleanup_stats_files(vnic);
+ device_unregister(&vnic->dev_info.dev);
+ wait_for_completion(&vnic->dev_info.released);
+ free_netdev(vnic->netdevice);
+}
+
+static struct vnic *vnic_handle_npevent(struct vnic *vnic,
+ enum vnic_npevent_type npevt_type)
+{
+ struct netpath *netpath;
+ const char *netpath_str;
+
+ if (npevt_type <= VNIC_PRINP_LASTTYPE)
+ netpath_str = netpath_to_string(vnic, &vnic->primary_path);
+ else if (npevt_type <= VNIC_SECNP_LASTTYPE)
+ netpath_str = netpath_to_string(vnic, &vnic->secondary_path);
+ else
+ netpath_str = netpath_to_string(vnic, vnic->current_path);
+
+ VNIC_INFO("%s: processing %s, netpath=%s, carrier=%d\n",
+ vnic->config->name, vnic_npevent_str[npevt_type],
+ netpath_str, vnic->carrier);
+
+ switch (npevt_type) {
+ case VNIC_PRINP_CONNECTED:
+ netpath = &vnic->primary_path;
+ if (vnic->state == VNIC_UNINITIALIZED) {
+ if (vnic_npevent_register(vnic, netpath))
+ break;
+ }
+ vnic_set_uni_multicast(vnic, netpath);
+ break;
+ case VNIC_SECNP_CONNECTED:
+ vnic_set_uni_multicast(vnic, &vnic->secondary_path);
+ break;
+ case VNIC_PRINP_TIMEREXPIRED:
+ netpath = &vnic->primary_path;
+ netpath->timer_state = NETPATH_TS_EXPIRED;
+ if (!netpath->carrier)
+ update_path_and_reconnect(netpath, vnic);
+ break;
+ case VNIC_SECNP_TIMEREXPIRED:
+ netpath = &vnic->secondary_path;
+ netpath->timer_state = NETPATH_TS_EXPIRED;
+ if (!netpath->carrier)
+ update_path_and_reconnect(netpath, vnic);
+ else {
+ if (vnic->state == VNIC_UNINITIALIZED)
+ vnic_npevent_register(vnic, netpath);
+ }
+ break;
+ case VNIC_PRINP_LINKUP:
+ vnic->primary_path.carrier = 1;
+ break;
+ case VNIC_SECNP_LINKUP:
+ netpath = &vnic->secondary_path;
+ netpath->carrier = 1;
+ if (!vnic->carrier)
+ vnic_set_netpath_timers(vnic, netpath);
+ break;
+ case VNIC_PRINP_LINKDOWN:
+ vnic->primary_path.carrier = 0;
+ break;
+ case VNIC_SECNP_LINKDOWN:
+ if (vnic->state == VNIC_UNINITIALIZED)
+ netpath_timer_stop(&vnic->secondary_path);
+ vnic->secondary_path.carrier = 0;
+ break;
+ case VNIC_PRINP_DISCONNECTED:
+ netpath = &vnic->primary_path;
+ netpath_timer_stop(netpath);
+ netpath->carrier = 0;
+ update_path_and_reconnect(netpath, vnic);
+ break;
+ case VNIC_SECNP_DISCONNECTED:
+ netpath = &vnic->secondary_path;
+ netpath_timer_stop(netpath);
+ netpath->carrier = 0;
+ update_path_and_reconnect(netpath, vnic);
+ break;
+ case VNIC_PRINP_SETLINK:
+ netpath = vnic->current_path;
+ if (!netpath || !netpath->viport)
+ break;
+ viport_set_link(netpath->viport,
+ vnic->netdevice->flags,
+ vnic->netdevice->mtu);
+ break;
+ case VNIC_SECNP_SETLINK:
+ netpath = &vnic->secondary_path;
+ if (!netpath || !netpath->viport)
+ break;
+ viport_set_link(netpath->viport,
+ vnic->netdevice->flags,
+ vnic->netdevice->mtu);
+ break;
+ case VNIC_NP_FREEVNIC:
+ vnic_handle_free_vnic_evt(vnic);
+ vnic = NULL;
+ break;
+ }
+ return vnic;
+}
+
+static int vnic_npevent_statemachine(void *context)
+{
+ struct vnic_npevent *vnic_link_evt;
+ enum vnic_npevent_type npevt_type;
+ struct vnic *vnic;
+ int last_carrier;
+ int other_path_ok = 0;
+ struct netpath *last_path;
+
+ while (!vnic_npevent_thread_end ||
+ !list_empty(&vnic_npevent_list)) {
+ unsigned long flags;
+
+ wait_event_interruptible(vnic_npevent_queue,
+ !list_empty(&vnic_npevent_list)
+ || vnic_npevent_thread_end);
+ spin_lock_irqsave(&vnic_npevent_list_lock, flags);
+ if (list_empty(&vnic_npevent_list)) {
+ spin_unlock_irqrestore(&vnic_npevent_list_lock,
+ flags);
+ VNIC_INFO("netpath statemachine wake"
+ " on empty list\n");
+ continue;
+ }
+
+ vnic_link_evt = list_first_entry(&vnic_npevent_list,
+ struct vnic_npevent,
+ list_ptrs);
+ list_del(&vnic_link_evt->list_ptrs);
+ spin_unlock_irqrestore(&vnic_npevent_list_lock, flags);
+ vnic = vnic_link_evt->vnic;
+ npevt_type = vnic_link_evt->event_type;
+ kfree(vnic_link_evt);
+
+ if (vnic->current_path == &vnic->secondary_path)
+ other_path_ok = vnic->primary_path.carrier;
+ else if (vnic->current_path == &vnic->primary_path)
+ other_path_ok = vnic->secondary_path.carrier;
+
+ vnic = vnic_handle_npevent(vnic, npevt_type);
+
+ if (!vnic)
+ continue;
+
+ last_carrier = vnic->carrier;
+ last_path = vnic->current_path;
+
+ if (!vnic->current_path ||
+ !vnic->current_path->carrier) {
+ vnic->carrier = 0;
+ vnic->current_path = NULL;
+ vnic->netdevice->features &= ~NETIF_F_IP_CSUM;
+ }
+
+ if (!vnic->carrier)
+ vnic_carrier_loss(vnic, last_path);
+ else if ((vnic->current_path != &vnic->primary_path) &&
+ (vnic->config->prefer_primary) &&
+ (vnic->primary_path.carrier))
+ vnic_check_primary_path_timer(vnic);
+
+ if (last_path)
+ vnic_report_path_change(vnic, last_path,
+ other_path_ok);
+
+ VNIC_INFO("new netpath=%s, carrier=%d\n",
+ netpath_to_string(vnic, vnic->current_path),
+ vnic->carrier);
+
+ if (vnic->current_path != last_path)
+ vnic_handle_path_change(vnic, &last_path);
+
+ if (vnic->carrier != last_carrier) {
+ if (vnic->carrier) {
+ VNIC_INFO("netif_carrier_on\n");
+ netif_carrier_on(vnic->netdevice);
+ vnic_carrier_loss_stats(vnic);
+ } else {
+ VNIC_INFO("netif_carrier_off\n");
+ netif_carrier_off(vnic->netdevice);
+ vnic_disconn_stats(vnic);
+ }
+
+ }
+ }
+ complete_and_exit(&vnic_npevent_thread_exit, 0);
+ return 0;
+}
+
+void vnic_npevent_queue_evt(struct netpath *netpath,
+ enum vnic_npevent_type evt)
+{
+ struct vnic_npevent *npevent;
+ unsigned long flags;
+
+ npevent = kmalloc(sizeof *npevent, GFP_ATOMIC);
+ if (!npevent) {
+ VNIC_ERROR("Could not allocate memory for vnic event\n");
+ return;
+ }
+ npevent->vnic = netpath->parent;
+ npevent->event_type = evt;
+ INIT_LIST_HEAD(&npevent->list_ptrs);
+ spin_lock_irqsave(&vnic_npevent_list_lock, flags);
+ list_add_tail(&npevent->list_ptrs, &vnic_npevent_list);
+ spin_unlock_irqrestore(&vnic_npevent_list_lock, flags);
+ wake_up(&vnic_npevent_queue);
+}
+
+void vnic_npevent_dequeue_evt(struct netpath *netpath,
+ enum vnic_npevent_type evt)
+{
+ unsigned long flags;
+ struct vnic_npevent *npevt, *tmp;
+ struct vnic *vnic = netpath->parent;
+
+ spin_lock_irqsave(&vnic_npevent_list_lock, flags);
+ if (list_empty(&vnic_npevent_list))
+ goto out;
+ list_for_each_entry_safe(npevt, tmp, &vnic_npevent_list,
+ list_ptrs) {
+ if ((npevt->vnic == vnic) &&
+ (npevt->event_type == evt)) {
+ list_del(&npevt->list_ptrs);
+ kfree(npevt);
+ break;
+ }
+ }
+out:
+ spin_unlock_irqrestore(&vnic_npevent_list_lock, flags);
+}
+
+static int vnic_npevent_start(void)
+{
+ VNIC_FUNCTION("vnic_npevent_start()\n");
+
+ spin_lock_init(&vnic_npevent_list_lock);
+ vnic_npevent_thread = kthread_run(vnic_npevent_statemachine, NULL,
+ "qlgc_vnic_npevent_s_m");
+ if (IS_ERR(vnic_npevent_thread)) {
+ printk(KERN_WARNING PFX "failed to create vnic npevent"
+ " thread; error %d\n",
+ (int) PTR_ERR(vnic_npevent_thread));
+ vnic_npevent_thread = NULL;
+ return 1;
+ }
+
+ return 0;
+}
+
+void vnic_npevent_cleanup(void)
+{
+ if (vnic_npevent_thread) {
+ vnic_npevent_thread_end = 1;
+ wake_up(&vnic_npevent_queue);
+ wait_for_completion(&vnic_npevent_thread_exit);
+ vnic_npevent_thread = NULL;
+ }
+}
+
+static void vnic_setup(struct net_device *device)
+{
+ ether_setup(device);
+
+ /* ether_setup is used to fill
+ * device parameters for ethernet devices.
+ * We override some of the parameters
+ * which are specific to VNIC.
+ */
+ device->get_stats = vnic_get_stats;
+ device->open = vnic_open;
+ device->stop = vnic_stop;
+ device->hard_start_xmit = vnic_hard_start_xmit;
+ device->tx_timeout = vnic_tx_timeout;
+ device->set_multicast_list = vnic_set_multicast_list;
+ device->set_mac_address = vnic_set_mac_address;
+ device->change_mtu = vnic_change_mtu;
+ device->watchdog_timeo = 10 * HZ;
+ device->features = 0;
+}
+
+struct vnic *vnic_allocate(struct vnic_config *config)
+{
+ struct vnic *vnic = NULL;
+ struct net_device *netdev;
+
+ VNIC_FUNCTION("vnic_allocate()\n");
+ netdev = alloc_netdev((int) sizeof(*vnic), config->name, vnic_setup);
+ if (!netdev) {
+ VNIC_ERROR("failed allocating vnic structure\n");
+ return NULL;
+ }
+
+ vnic = netdev_priv(netdev);
+ vnic->netdevice = netdev;
+ spin_lock_init(&vnic->lock);
+ spin_lock_init(&vnic->current_path_lock);
+ vnic_alloc_stats(vnic);
+ vnic->state = VNIC_UNINITIALIZED;
+ vnic->config = config;
+
+ netpath_init(&vnic->primary_path, vnic, 0);
+ netpath_init(&vnic->secondary_path, vnic, 1);
+
+ vnic->current_path = NULL;
+ vnic->failed_over = 0;
+
+ list_add_tail(&vnic->list_ptrs, &vnic_list);
+
+ return vnic;
+}
+
+void vnic_free(struct vnic *vnic)
+{
+ VNIC_FUNCTION("vnic_free()\n");
+ list_del(&vnic->list_ptrs);
+ vnic_npevent_queue_evt(&vnic->primary_path, VNIC_NP_FREEVNIC);
+}
+
+static void __exit vnic_cleanup(void)
+{
+ VNIC_FUNCTION("vnic_cleanup()\n");
+
+ VNIC_INIT("unloading %s\n", MODULEDETAILS);
+
+ while (!list_empty(&vnic_list)) {
+ struct vnic *vnic =
+ list_first_entry(&vnic_list, struct vnic, list_ptrs);
+ vnic_free(vnic);
+ }
+
+ vnic_npevent_cleanup();
+ viport_cleanup();
+ vnic_ib_cleanup();
+}
+
+static int __init vnic_init(void)
+{
+ int ret;
+ VNIC_FUNCTION("vnic_init()\n");
+ VNIC_INIT("Initializing %s\n", MODULEDETAILS);
+
+ ret = config_start();
+ if (ret) {
+ VNIC_ERROR("config_start failed\n");
+ goto failure;
+ }
+
+ ret = vnic_ib_init();
+ if (ret) {
+ VNIC_ERROR("ib_start failed\n");
+ goto failure;
+ }
+
+ ret = viport_start();
+ if (ret) {
+ VNIC_ERROR("viport_start failed\n");
+ goto failure;
+ }
+
+ ret = vnic_npevent_start();
+ if (ret) {
+ VNIC_ERROR("vnic_npevent_start failed\n");
+ goto failure;
+ }
+
+ return 0;
+failure:
+ vnic_cleanup();
+ return ret;
+}
+
+module_init(vnic_init);
+module_exit(vnic_cleanup);
diff --git a/drivers/infiniband/ulp/qlgc_vnic/vnic_main.h b/drivers/infiniband/ulp/qlgc_vnic/vnic_main.h
new file mode 100644
index 0000000..568e045
--- /dev/null
+++ b/drivers/infiniband/ulp/qlgc_vnic/vnic_main.h
@@ -0,0 +1,159 @@
+/*
+ * Copyright (c) 2006 QLogic, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef VNIC_MAIN_H_INCLUDED
+#define VNIC_MAIN_H_INCLUDED
+
+#include <linux/timex.h>
+#include <linux/netdevice.h>
+#include <linux/kthread.h>
+#include <linux/fs.h>
+
+#include "vnic_config.h"
+#include "vnic_netpath.h"
+
+extern u16 vnic_max_mtu;
+extern struct list_head vnic_list;
+extern struct attribute_group vnic_stats_attr_group;
+extern cycles_t vnic_recv_ref;
+
+enum vnic_npevent_type {
+ VNIC_PRINP_CONNECTED = 0,
+ VNIC_PRINP_DISCONNECTED = 1,
+ VNIC_PRINP_LINKUP = 2,
+ VNIC_PRINP_LINKDOWN = 3,
+ VNIC_PRINP_TIMEREXPIRED = 4,
+ VNIC_PRINP_SETLINK = 5,
+
+ /* used to figure out PRI vs SEC types for dbg msg*/
+ VNIC_PRINP_LASTTYPE = VNIC_PRINP_SETLINK,
+
+ VNIC_SECNP_CONNECTED = 6,
+ VNIC_SECNP_DISCONNECTED = 7,
+ VNIC_SECNP_LINKUP = 8,
+ VNIC_SECNP_LINKDOWN = 9,
+ VNIC_SECNP_TIMEREXPIRED = 10,
+ VNIC_SECNP_SETLINK = 11,
+
+ /* used to figure out PRI vs SEC types for dbg msg*/
+ VNIC_SECNP_LASTTYPE = VNIC_SECNP_SETLINK,
+
+ VNIC_NP_FREEVNIC = 12,
+
+ /*
+ * NOTE : If any new netpath event is being added, don't forget to
+ * add corresponding netpath event string into vnic_main.c.
+ */
+};
+
+struct vnic_npevent {
+ struct list_head list_ptrs;
+ struct vnic *vnic;
+ enum vnic_npevent_type event_type;
+};
+
+void vnic_npevent_queue_evt(struct netpath *netpath,
+ enum vnic_npevent_type evt);
+void vnic_npevent_dequeue_evt(struct netpath *netpath,
+ enum vnic_npevent_type evt);
+
+enum vnic_state {
+ VNIC_UNINITIALIZED = 0,
+ VNIC_REGISTERED = 1
+};
+
+struct vnic_param {
+ int rx_csum;
+ int tx_csum;
+ struct vnic_path_param primary_path;
+ struct vnic_path_param secondary_path;
+};
+
+struct vnic {
+ struct list_head list_ptrs;
+ enum vnic_state state;
+ struct vnic_param params;
+ struct vnic_config *config;
+ struct netpath *current_path;
+ struct netpath primary_path;
+ struct netpath secondary_path;
+ int carrier;
+ int failed_over;
+ int mac_set;
+ struct net_device *netdevice;
+ struct dev_info dev_info;
+ struct dev_mc_list *mc_list;
+ int mc_list_len;
+ int mc_count;
+ spinlock_t lock;
+ spinlock_t current_path_lock;
+#ifdef CONFIG_INFINIBAND_QLGC_VNIC_STATS
+ struct {
+ cycles_t start_time;
+ cycles_t conn_time;
+ cycles_t disconn_ref; /* intermediate time */
+ cycles_t disconn_time;
+ u32 disconn_num;
+ cycles_t xmit_time;
+ u32 xmit_num;
+ u32 xmit_fail;
+ cycles_t recv_time;
+ u32 recv_num;
+ u32 multicast_recv_num;
+ cycles_t xmit_ref; /* intermediate time */
+ cycles_t xmit_off_time;
+ u32 xmit_off_num;
+ cycles_t carrier_ref; /* intermediate time */
+ cycles_t carrier_off_time;
+ u32 carrier_off_num;
+ } statistics;
+ struct dev_info stat_info;
+#endif /* CONFIG_INFINIBAND_QLGC_VNIC_STATS */
+};
+
+struct vnic *vnic_allocate(struct vnic_config *config);
+
+void vnic_free(struct vnic *vnic);
+
+void vnic_connected(struct vnic *vnic, struct netpath *netpath);
+void vnic_disconnected(struct vnic *vnic, struct netpath *netpath);
+
+void vnic_link_up(struct vnic *vnic, struct netpath *netpath);
+void vnic_link_down(struct vnic *vnic, struct netpath *netpath);
+
+void vnic_stop_xmit(struct vnic *vnic, struct netpath *netpath);
+void vnic_restart_xmit(struct vnic *vnic, struct netpath *netpath);
+
+void vnic_recv_packet(struct vnic *vnic, struct netpath *netpath,
+ struct sk_buff *skb);
+void vnic_npevent_cleanup(void);
+#endif /* VNIC_MAIN_H_INCLUDED */
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