Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/net/iseries_veth.c b/drivers/net/iseries_veth.c
new file mode 100644
index 0000000..855f8b2
--- /dev/null
+++ b/drivers/net/iseries_veth.c
@@ -0,0 +1,1422 @@
+/* File veth.c created by Kyle A. Lucke on Mon Aug 7 2000. */
+/*
+ * IBM eServer iSeries Virtual Ethernet Device Driver
+ * Copyright (C) 2001 Kyle A. Lucke (klucke@us.ibm.com), IBM Corp.
+ * Substantially cleaned up by:
+ * Copyright (C) 2003 David Gibson <dwg@au1.ibm.com>, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ *
+ *
+ * This module implements the virtual ethernet device for iSeries LPAR
+ * Linux. It uses hypervisor message passing to implement an
+ * ethernet-like network device communicating between partitions on
+ * the iSeries.
+ *
+ * The iSeries LPAR hypervisor currently allows for up to 16 different
+ * virtual ethernets. These are all dynamically configurable on
+ * OS/400 partitions, but dynamic configuration is not supported under
+ * Linux yet. An ethXX network device will be created for each
+ * virtual ethernet this partition is connected to.
+ *
+ * - This driver is responsible for routing packets to and from other
+ * partitions. The MAC addresses used by the virtual ethernets
+ * contains meaning and must not be modified.
+ *
+ * - Having 2 virtual ethernets to the same remote partition DOES NOT
+ * double the available bandwidth. The 2 devices will share the
+ * available hypervisor bandwidth.
+ *
+ * - If you send a packet to your own mac address, it will just be
+ * dropped, you won't get it on the receive side.
+ *
+ * - Multicast is implemented by sending the frame frame to every
+ * other partition. It is the responsibility of the receiving
+ * partition to filter the addresses desired.
+ *
+ * Tunable parameters:
+ *
+ * VETH_NUMBUFFERS: This compile time option defaults to 120. It
+ * controls how much memory Linux will allocate per remote partition
+ * it is communicating with. It can be thought of as the maximum
+ * number of packets outstanding to a remote partition at a time.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/mm.h>
+#include <linux/ethtool.h>
+#include <asm/iSeries/mf.h>
+#include <asm/iSeries/iSeries_pci.h>
+#include <asm/uaccess.h>
+
+#include <asm/iSeries/HvLpConfig.h>
+#include <asm/iSeries/HvTypes.h>
+#include <asm/iSeries/HvLpEvent.h>
+#include <asm/iommu.h>
+#include <asm/vio.h>
+
+#include "iseries_veth.h"
+
+MODULE_AUTHOR("Kyle Lucke <klucke@us.ibm.com>");
+MODULE_DESCRIPTION("iSeries Virtual ethernet driver");
+MODULE_LICENSE("GPL");
+
+#define VETH_NUMBUFFERS (120)
+#define VETH_ACKTIMEOUT (1000000) /* microseconds */
+#define VETH_MAX_MCAST (12)
+
+#define VETH_MAX_MTU (9000)
+
+#if VETH_NUMBUFFERS < 10
+#define ACK_THRESHOLD (1)
+#elif VETH_NUMBUFFERS < 20
+#define ACK_THRESHOLD (4)
+#elif VETH_NUMBUFFERS < 40
+#define ACK_THRESHOLD (10)
+#else
+#define ACK_THRESHOLD (20)
+#endif
+
+#define VETH_STATE_SHUTDOWN (0x0001)
+#define VETH_STATE_OPEN (0x0002)
+#define VETH_STATE_RESET (0x0004)
+#define VETH_STATE_SENTMON (0x0008)
+#define VETH_STATE_SENTCAPS (0x0010)
+#define VETH_STATE_GOTCAPACK (0x0020)
+#define VETH_STATE_GOTCAPS (0x0040)
+#define VETH_STATE_SENTCAPACK (0x0080)
+#define VETH_STATE_READY (0x0100)
+
+struct veth_msg {
+ struct veth_msg *next;
+ struct VethFramesData data;
+ int token;
+ unsigned long in_use;
+ struct sk_buff *skb;
+ struct device *dev;
+};
+
+struct veth_lpar_connection {
+ HvLpIndex remote_lp;
+ struct work_struct statemachine_wq;
+ struct veth_msg *msgs;
+ int num_events;
+ struct VethCapData local_caps;
+
+ struct timer_list ack_timer;
+
+ spinlock_t lock;
+ unsigned long state;
+ HvLpInstanceId src_inst;
+ HvLpInstanceId dst_inst;
+ struct VethLpEvent cap_event, cap_ack_event;
+ u16 pending_acks[VETH_MAX_ACKS_PER_MSG];
+ u32 num_pending_acks;
+
+ int num_ack_events;
+ struct VethCapData remote_caps;
+ u32 ack_timeout;
+
+ spinlock_t msg_stack_lock;
+ struct veth_msg *msg_stack_head;
+};
+
+struct veth_port {
+ struct device *dev;
+ struct net_device_stats stats;
+ u64 mac_addr;
+ HvLpIndexMap lpar_map;
+
+ spinlock_t pending_gate;
+ struct sk_buff *pending_skb;
+ HvLpIndexMap pending_lpmask;
+
+ rwlock_t mcast_gate;
+ int promiscuous;
+ int all_mcast;
+ int num_mcast;
+ u64 mcast_addr[VETH_MAX_MCAST];
+};
+
+static HvLpIndex this_lp;
+static struct veth_lpar_connection *veth_cnx[HVMAXARCHITECTEDLPS]; /* = 0 */
+static struct net_device *veth_dev[HVMAXARCHITECTEDVIRTUALLANS]; /* = 0 */
+
+static int veth_start_xmit(struct sk_buff *skb, struct net_device *dev);
+static void veth_recycle_msg(struct veth_lpar_connection *, struct veth_msg *);
+static void veth_flush_pending(struct veth_lpar_connection *cnx);
+static void veth_receive(struct veth_lpar_connection *, struct VethLpEvent *);
+static void veth_timed_ack(unsigned long connectionPtr);
+
+/*
+ * Utility functions
+ */
+
+#define veth_printk(prio, fmt, args...) \
+ printk(prio "%s: " fmt, __FILE__, ## args)
+
+#define veth_error(fmt, args...) \
+ printk(KERN_ERR "(%s:%3.3d) ERROR: " fmt, __FILE__, __LINE__ , ## args)
+
+static inline void veth_stack_push(struct veth_lpar_connection *cnx,
+ struct veth_msg *msg)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&cnx->msg_stack_lock, flags);
+ msg->next = cnx->msg_stack_head;
+ cnx->msg_stack_head = msg;
+ spin_unlock_irqrestore(&cnx->msg_stack_lock, flags);
+}
+
+static inline struct veth_msg *veth_stack_pop(struct veth_lpar_connection *cnx)
+{
+ unsigned long flags;
+ struct veth_msg *msg;
+
+ spin_lock_irqsave(&cnx->msg_stack_lock, flags);
+ msg = cnx->msg_stack_head;
+ if (msg)
+ cnx->msg_stack_head = cnx->msg_stack_head->next;
+ spin_unlock_irqrestore(&cnx->msg_stack_lock, flags);
+ return msg;
+}
+
+static inline HvLpEvent_Rc
+veth_signalevent(struct veth_lpar_connection *cnx, u16 subtype,
+ HvLpEvent_AckInd ackind, HvLpEvent_AckType acktype,
+ u64 token,
+ u64 data1, u64 data2, u64 data3, u64 data4, u64 data5)
+{
+ return HvCallEvent_signalLpEventFast(cnx->remote_lp,
+ HvLpEvent_Type_VirtualLan,
+ subtype, ackind, acktype,
+ cnx->src_inst,
+ cnx->dst_inst,
+ token, data1, data2, data3,
+ data4, data5);
+}
+
+static inline HvLpEvent_Rc veth_signaldata(struct veth_lpar_connection *cnx,
+ u16 subtype, u64 token, void *data)
+{
+ u64 *p = (u64 *) data;
+
+ return veth_signalevent(cnx, subtype, HvLpEvent_AckInd_NoAck,
+ HvLpEvent_AckType_ImmediateAck,
+ token, p[0], p[1], p[2], p[3], p[4]);
+}
+
+struct veth_allocation {
+ struct completion c;
+ int num;
+};
+
+static void veth_complete_allocation(void *parm, int number)
+{
+ struct veth_allocation *vc = (struct veth_allocation *)parm;
+
+ vc->num = number;
+ complete(&vc->c);
+}
+
+static int veth_allocate_events(HvLpIndex rlp, int number)
+{
+ struct veth_allocation vc = { COMPLETION_INITIALIZER(vc.c), 0 };
+
+ mf_allocate_lp_events(rlp, HvLpEvent_Type_VirtualLan,
+ sizeof(struct VethLpEvent), number,
+ &veth_complete_allocation, &vc);
+ wait_for_completion(&vc.c);
+
+ return vc.num;
+}
+
+/*
+ * LPAR connection code
+ */
+
+static inline void veth_kick_statemachine(struct veth_lpar_connection *cnx)
+{
+ schedule_work(&cnx->statemachine_wq);
+}
+
+static void veth_take_cap(struct veth_lpar_connection *cnx,
+ struct VethLpEvent *event)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&cnx->lock, flags);
+ /* Receiving caps may mean the other end has just come up, so
+ * we need to reload the instance ID of the far end */
+ cnx->dst_inst =
+ HvCallEvent_getTargetLpInstanceId(cnx->remote_lp,
+ HvLpEvent_Type_VirtualLan);
+
+ if (cnx->state & VETH_STATE_GOTCAPS) {
+ veth_error("Received a second capabilities from lpar %d\n",
+ cnx->remote_lp);
+ event->base_event.xRc = HvLpEvent_Rc_BufferNotAvailable;
+ HvCallEvent_ackLpEvent((struct HvLpEvent *) event);
+ } else {
+ memcpy(&cnx->cap_event, event, sizeof(cnx->cap_event));
+ cnx->state |= VETH_STATE_GOTCAPS;
+ veth_kick_statemachine(cnx);
+ }
+ spin_unlock_irqrestore(&cnx->lock, flags);
+}
+
+static void veth_take_cap_ack(struct veth_lpar_connection *cnx,
+ struct VethLpEvent *event)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&cnx->lock, flags);
+ if (cnx->state & VETH_STATE_GOTCAPACK) {
+ veth_error("Received a second capabilities ack from lpar %d\n",
+ cnx->remote_lp);
+ } else {
+ memcpy(&cnx->cap_ack_event, event,
+ sizeof(&cnx->cap_ack_event));
+ cnx->state |= VETH_STATE_GOTCAPACK;
+ veth_kick_statemachine(cnx);
+ }
+ spin_unlock_irqrestore(&cnx->lock, flags);
+}
+
+static void veth_take_monitor_ack(struct veth_lpar_connection *cnx,
+ struct VethLpEvent *event)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&cnx->lock, flags);
+ veth_printk(KERN_DEBUG, "Monitor ack returned for lpar %d\n",
+ cnx->remote_lp);
+ cnx->state |= VETH_STATE_RESET;
+ veth_kick_statemachine(cnx);
+ spin_unlock_irqrestore(&cnx->lock, flags);
+}
+
+static void veth_handle_ack(struct VethLpEvent *event)
+{
+ HvLpIndex rlp = event->base_event.xTargetLp;
+ struct veth_lpar_connection *cnx = veth_cnx[rlp];
+
+ BUG_ON(! cnx);
+
+ switch (event->base_event.xSubtype) {
+ case VethEventTypeCap:
+ veth_take_cap_ack(cnx, event);
+ break;
+ case VethEventTypeMonitor:
+ veth_take_monitor_ack(cnx, event);
+ break;
+ default:
+ veth_error("Unknown ack type %d from lpar %d\n",
+ event->base_event.xSubtype, rlp);
+ };
+}
+
+static void veth_handle_int(struct VethLpEvent *event)
+{
+ HvLpIndex rlp = event->base_event.xSourceLp;
+ struct veth_lpar_connection *cnx = veth_cnx[rlp];
+ unsigned long flags;
+ int i;
+
+ BUG_ON(! cnx);
+
+ switch (event->base_event.xSubtype) {
+ case VethEventTypeCap:
+ veth_take_cap(cnx, event);
+ break;
+ case VethEventTypeMonitor:
+ /* do nothing... this'll hang out here til we're dead,
+ * and the hypervisor will return it for us. */
+ break;
+ case VethEventTypeFramesAck:
+ spin_lock_irqsave(&cnx->lock, flags);
+ for (i = 0; i < VETH_MAX_ACKS_PER_MSG; ++i) {
+ u16 msgnum = event->u.frames_ack_data.token[i];
+
+ if (msgnum < VETH_NUMBUFFERS)
+ veth_recycle_msg(cnx, cnx->msgs + msgnum);
+ }
+ spin_unlock_irqrestore(&cnx->lock, flags);
+ veth_flush_pending(cnx);
+ break;
+ case VethEventTypeFrames:
+ veth_receive(cnx, event);
+ break;
+ default:
+ veth_error("Unknown interrupt type %d from lpar %d\n",
+ event->base_event.xSubtype, rlp);
+ };
+}
+
+static void veth_handle_event(struct HvLpEvent *event, struct pt_regs *regs)
+{
+ struct VethLpEvent *veth_event = (struct VethLpEvent *)event;
+
+ if (event->xFlags.xFunction == HvLpEvent_Function_Ack)
+ veth_handle_ack(veth_event);
+ else if (event->xFlags.xFunction == HvLpEvent_Function_Int)
+ veth_handle_int(veth_event);
+}
+
+static int veth_process_caps(struct veth_lpar_connection *cnx)
+{
+ struct VethCapData *remote_caps = &cnx->remote_caps;
+ int num_acks_needed;
+
+ /* Convert timer to jiffies */
+ cnx->ack_timeout = remote_caps->ack_timeout * HZ / 1000000;
+
+ if ( (remote_caps->num_buffers == 0)
+ || (remote_caps->ack_threshold > VETH_MAX_ACKS_PER_MSG)
+ || (remote_caps->ack_threshold == 0)
+ || (cnx->ack_timeout == 0) ) {
+ veth_error("Received incompatible capabilities from lpar %d\n",
+ cnx->remote_lp);
+ return HvLpEvent_Rc_InvalidSubtypeData;
+ }
+
+ num_acks_needed = (remote_caps->num_buffers
+ / remote_caps->ack_threshold) + 1;
+
+ /* FIXME: locking on num_ack_events? */
+ if (cnx->num_ack_events < num_acks_needed) {
+ int num;
+
+ num = veth_allocate_events(cnx->remote_lp,
+ num_acks_needed-cnx->num_ack_events);
+ if (num > 0)
+ cnx->num_ack_events += num;
+
+ if (cnx->num_ack_events < num_acks_needed) {
+ veth_error("Couldn't allocate enough ack events for lpar %d\n",
+ cnx->remote_lp);
+
+ return HvLpEvent_Rc_BufferNotAvailable;
+ }
+ }
+
+
+ return HvLpEvent_Rc_Good;
+}
+
+/* FIXME: The gotos here are a bit dubious */
+static void veth_statemachine(void *p)
+{
+ struct veth_lpar_connection *cnx = (struct veth_lpar_connection *)p;
+ int rlp = cnx->remote_lp;
+ int rc;
+
+ spin_lock_irq(&cnx->lock);
+
+ restart:
+ if (cnx->state & VETH_STATE_RESET) {
+ int i;
+
+ del_timer(&cnx->ack_timer);
+
+ if (cnx->state & VETH_STATE_OPEN)
+ HvCallEvent_closeLpEventPath(cnx->remote_lp,
+ HvLpEvent_Type_VirtualLan);
+
+ /* reset ack data */
+ memset(&cnx->pending_acks, 0xff, sizeof (cnx->pending_acks));
+ cnx->num_pending_acks = 0;
+
+ cnx->state &= ~(VETH_STATE_RESET | VETH_STATE_SENTMON
+ | VETH_STATE_OPEN | VETH_STATE_SENTCAPS
+ | VETH_STATE_GOTCAPACK | VETH_STATE_GOTCAPS
+ | VETH_STATE_SENTCAPACK | VETH_STATE_READY);
+
+ /* Clean up any leftover messages */
+ if (cnx->msgs)
+ for (i = 0; i < VETH_NUMBUFFERS; ++i)
+ veth_recycle_msg(cnx, cnx->msgs + i);
+ spin_unlock_irq(&cnx->lock);
+ veth_flush_pending(cnx);
+ spin_lock_irq(&cnx->lock);
+ if (cnx->state & VETH_STATE_RESET)
+ goto restart;
+ }
+
+ if (cnx->state & VETH_STATE_SHUTDOWN)
+ /* It's all over, do nothing */
+ goto out;
+
+ if ( !(cnx->state & VETH_STATE_OPEN) ) {
+ if (! cnx->msgs || (cnx->num_events < (2 + VETH_NUMBUFFERS)) )
+ goto cant_cope;
+
+ HvCallEvent_openLpEventPath(rlp, HvLpEvent_Type_VirtualLan);
+ cnx->src_inst =
+ HvCallEvent_getSourceLpInstanceId(rlp,
+ HvLpEvent_Type_VirtualLan);
+ cnx->dst_inst =
+ HvCallEvent_getTargetLpInstanceId(rlp,
+ HvLpEvent_Type_VirtualLan);
+ cnx->state |= VETH_STATE_OPEN;
+ }
+
+ if ( (cnx->state & VETH_STATE_OPEN)
+ && !(cnx->state & VETH_STATE_SENTMON) ) {
+ rc = veth_signalevent(cnx, VethEventTypeMonitor,
+ HvLpEvent_AckInd_DoAck,
+ HvLpEvent_AckType_DeferredAck,
+ 0, 0, 0, 0, 0, 0);
+
+ if (rc == HvLpEvent_Rc_Good) {
+ cnx->state |= VETH_STATE_SENTMON;
+ } else {
+ if ( (rc != HvLpEvent_Rc_PartitionDead)
+ && (rc != HvLpEvent_Rc_PathClosed) )
+ veth_error("Error sending monitor to "
+ "lpar %d, rc=%x\n",
+ rlp, (int) rc);
+
+ /* Oh well, hope we get a cap from the other
+ * end and do better when that kicks us */
+ goto out;
+ }
+ }
+
+ if ( (cnx->state & VETH_STATE_OPEN)
+ && !(cnx->state & VETH_STATE_SENTCAPS)) {
+ u64 *rawcap = (u64 *)&cnx->local_caps;
+
+ rc = veth_signalevent(cnx, VethEventTypeCap,
+ HvLpEvent_AckInd_DoAck,
+ HvLpEvent_AckType_ImmediateAck,
+ 0, rawcap[0], rawcap[1], rawcap[2],
+ rawcap[3], rawcap[4]);
+
+ if (rc == HvLpEvent_Rc_Good) {
+ cnx->state |= VETH_STATE_SENTCAPS;
+ } else {
+ if ( (rc != HvLpEvent_Rc_PartitionDead)
+ && (rc != HvLpEvent_Rc_PathClosed) )
+ veth_error("Error sending caps to "
+ "lpar %d, rc=%x\n",
+ rlp, (int) rc);
+ /* Oh well, hope we get a cap from the other
+ * end and do better when that kicks us */
+ goto out;
+ }
+ }
+
+ if ((cnx->state & VETH_STATE_GOTCAPS)
+ && !(cnx->state & VETH_STATE_SENTCAPACK)) {
+ struct VethCapData *remote_caps = &cnx->remote_caps;
+
+ memcpy(remote_caps, &cnx->cap_event.u.caps_data,
+ sizeof(*remote_caps));
+
+ spin_unlock_irq(&cnx->lock);
+ rc = veth_process_caps(cnx);
+ spin_lock_irq(&cnx->lock);
+
+ /* We dropped the lock, so recheck for anything which
+ * might mess us up */
+ if (cnx->state & (VETH_STATE_RESET|VETH_STATE_SHUTDOWN))
+ goto restart;
+
+ cnx->cap_event.base_event.xRc = rc;
+ HvCallEvent_ackLpEvent((struct HvLpEvent *)&cnx->cap_event);
+ if (rc == HvLpEvent_Rc_Good)
+ cnx->state |= VETH_STATE_SENTCAPACK;
+ else
+ goto cant_cope;
+ }
+
+ if ((cnx->state & VETH_STATE_GOTCAPACK)
+ && (cnx->state & VETH_STATE_GOTCAPS)
+ && !(cnx->state & VETH_STATE_READY)) {
+ if (cnx->cap_ack_event.base_event.xRc == HvLpEvent_Rc_Good) {
+ /* Start the ACK timer */
+ cnx->ack_timer.expires = jiffies + cnx->ack_timeout;
+ add_timer(&cnx->ack_timer);
+ cnx->state |= VETH_STATE_READY;
+ } else {
+ veth_printk(KERN_ERR, "Caps rejected (rc=%d) by "
+ "lpar %d\n",
+ cnx->cap_ack_event.base_event.xRc,
+ rlp);
+ goto cant_cope;
+ }
+ }
+
+ out:
+ spin_unlock_irq(&cnx->lock);
+ return;
+
+ cant_cope:
+ /* FIXME: we get here if something happens we really can't
+ * cope with. The link will never work once we get here, and
+ * all we can do is not lock the rest of the system up */
+ veth_error("Badness on connection to lpar %d (state=%04lx) "
+ " - shutting down\n", rlp, cnx->state);
+ cnx->state |= VETH_STATE_SHUTDOWN;
+ spin_unlock_irq(&cnx->lock);
+}
+
+static int veth_init_connection(u8 rlp)
+{
+ struct veth_lpar_connection *cnx;
+ struct veth_msg *msgs;
+ int i;
+
+ if ( (rlp == this_lp)
+ || ! HvLpConfig_doLpsCommunicateOnVirtualLan(this_lp, rlp) )
+ return 0;
+
+ cnx = kmalloc(sizeof(*cnx), GFP_KERNEL);
+ if (! cnx)
+ return -ENOMEM;
+ memset(cnx, 0, sizeof(*cnx));
+
+ cnx->remote_lp = rlp;
+ spin_lock_init(&cnx->lock);
+ INIT_WORK(&cnx->statemachine_wq, veth_statemachine, cnx);
+ init_timer(&cnx->ack_timer);
+ cnx->ack_timer.function = veth_timed_ack;
+ cnx->ack_timer.data = (unsigned long) cnx;
+ memset(&cnx->pending_acks, 0xff, sizeof (cnx->pending_acks));
+
+ veth_cnx[rlp] = cnx;
+
+ msgs = kmalloc(VETH_NUMBUFFERS * sizeof(struct veth_msg), GFP_KERNEL);
+ if (! msgs) {
+ veth_error("Can't allocate buffers for lpar %d\n", rlp);
+ return -ENOMEM;
+ }
+
+ cnx->msgs = msgs;
+ memset(msgs, 0, VETH_NUMBUFFERS * sizeof(struct veth_msg));
+ spin_lock_init(&cnx->msg_stack_lock);
+
+ for (i = 0; i < VETH_NUMBUFFERS; i++) {
+ msgs[i].token = i;
+ veth_stack_push(cnx, msgs + i);
+ }
+
+ cnx->num_events = veth_allocate_events(rlp, 2 + VETH_NUMBUFFERS);
+
+ if (cnx->num_events < (2 + VETH_NUMBUFFERS)) {
+ veth_error("Can't allocate events for lpar %d, only got %d\n",
+ rlp, cnx->num_events);
+ return -ENOMEM;
+ }
+
+ cnx->local_caps.num_buffers = VETH_NUMBUFFERS;
+ cnx->local_caps.ack_threshold = ACK_THRESHOLD;
+ cnx->local_caps.ack_timeout = VETH_ACKTIMEOUT;
+
+ return 0;
+}
+
+static void veth_stop_connection(u8 rlp)
+{
+ struct veth_lpar_connection *cnx = veth_cnx[rlp];
+
+ if (! cnx)
+ return;
+
+ spin_lock_irq(&cnx->lock);
+ cnx->state |= VETH_STATE_RESET | VETH_STATE_SHUTDOWN;
+ veth_kick_statemachine(cnx);
+ spin_unlock_irq(&cnx->lock);
+
+ flush_scheduled_work();
+
+ /* FIXME: not sure if this is necessary - will already have
+ * been deleted by the state machine, just want to make sure
+ * its not running any more */
+ del_timer_sync(&cnx->ack_timer);
+
+ if (cnx->num_events > 0)
+ mf_deallocate_lp_events(cnx->remote_lp,
+ HvLpEvent_Type_VirtualLan,
+ cnx->num_events,
+ NULL, NULL);
+ if (cnx->num_ack_events > 0)
+ mf_deallocate_lp_events(cnx->remote_lp,
+ HvLpEvent_Type_VirtualLan,
+ cnx->num_ack_events,
+ NULL, NULL);
+}
+
+static void veth_destroy_connection(u8 rlp)
+{
+ struct veth_lpar_connection *cnx = veth_cnx[rlp];
+
+ if (! cnx)
+ return;
+
+ kfree(cnx->msgs);
+ kfree(cnx);
+ veth_cnx[rlp] = NULL;
+}
+
+/*
+ * net_device code
+ */
+
+static int veth_open(struct net_device *dev)
+{
+ struct veth_port *port = (struct veth_port *) dev->priv;
+
+ memset(&port->stats, 0, sizeof (port->stats));
+ netif_start_queue(dev);
+ return 0;
+}
+
+static int veth_close(struct net_device *dev)
+{
+ netif_stop_queue(dev);
+ return 0;
+}
+
+static struct net_device_stats *veth_get_stats(struct net_device *dev)
+{
+ struct veth_port *port = (struct veth_port *) dev->priv;
+
+ return &port->stats;
+}
+
+static int veth_change_mtu(struct net_device *dev, int new_mtu)
+{
+ if ((new_mtu < 68) || (new_mtu > VETH_MAX_MTU))
+ return -EINVAL;
+ dev->mtu = new_mtu;
+ return 0;
+}
+
+static void veth_set_multicast_list(struct net_device *dev)
+{
+ struct veth_port *port = (struct veth_port *) dev->priv;
+ unsigned long flags;
+
+ write_lock_irqsave(&port->mcast_gate, flags);
+
+ if (dev->flags & IFF_PROMISC) { /* set promiscuous mode */
+ printk(KERN_INFO "%s: Promiscuous mode enabled.\n",
+ dev->name);
+ port->promiscuous = 1;
+ } else if ( (dev->flags & IFF_ALLMULTI)
+ || (dev->mc_count > VETH_MAX_MCAST) ) {
+ port->all_mcast = 1;
+ } else {
+ struct dev_mc_list *dmi = dev->mc_list;
+ int i;
+
+ /* Update table */
+ port->num_mcast = 0;
+
+ for (i = 0; i < dev->mc_count; i++) {
+ u8 *addr = dmi->dmi_addr;
+ u64 xaddr = 0;
+
+ if (addr[0] & 0x01) {/* multicast address? */
+ memcpy(&xaddr, addr, ETH_ALEN);
+ port->mcast_addr[port->num_mcast] = xaddr;
+ port->num_mcast++;
+ }
+ dmi = dmi->next;
+ }
+ }
+
+ write_unlock_irqrestore(&port->mcast_gate, flags);
+}
+
+static void veth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
+{
+ strncpy(info->driver, "veth", sizeof(info->driver) - 1);
+ info->driver[sizeof(info->driver) - 1] = '\0';
+ strncpy(info->version, "1.0", sizeof(info->version) - 1);
+}
+
+static int veth_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
+{
+ ecmd->supported = (SUPPORTED_1000baseT_Full
+ | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
+ ecmd->advertising = (SUPPORTED_1000baseT_Full
+ | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
+ ecmd->port = PORT_FIBRE;
+ ecmd->transceiver = XCVR_INTERNAL;
+ ecmd->phy_address = 0;
+ ecmd->speed = SPEED_1000;
+ ecmd->duplex = DUPLEX_FULL;
+ ecmd->autoneg = AUTONEG_ENABLE;
+ ecmd->maxtxpkt = 120;
+ ecmd->maxrxpkt = 120;
+ return 0;
+}
+
+static u32 veth_get_link(struct net_device *dev)
+{
+ return 1;
+}
+
+static struct ethtool_ops ops = {
+ .get_drvinfo = veth_get_drvinfo,
+ .get_settings = veth_get_settings,
+ .get_link = veth_get_link,
+};
+
+static void veth_tx_timeout(struct net_device *dev)
+{
+ struct veth_port *port = (struct veth_port *)dev->priv;
+ struct net_device_stats *stats = &port->stats;
+ unsigned long flags;
+ int i;
+
+ stats->tx_errors++;
+
+ spin_lock_irqsave(&port->pending_gate, flags);
+
+ printk(KERN_WARNING "%s: Tx timeout! Resetting lp connections: %08x\n",
+ dev->name, port->pending_lpmask);
+
+ /* If we've timed out the queue must be stopped, which should
+ * only ever happen when there is a pending packet. */
+ WARN_ON(! port->pending_lpmask);
+
+ for (i = 0; i < HVMAXARCHITECTEDLPS; i++) {
+ struct veth_lpar_connection *cnx = veth_cnx[i];
+
+ if (! (port->pending_lpmask & (1<<i)))
+ continue;
+
+ /* If we're pending on it, we must be connected to it,
+ * so we should certainly have a structure for it. */
+ BUG_ON(! cnx);
+
+ /* Theoretically we could be kicking a connection
+ * which doesn't deserve it, but in practice if we've
+ * had a Tx timeout, the pending_lpmask will have
+ * exactly one bit set - the connection causing the
+ * problem. */
+ spin_lock(&cnx->lock);
+ cnx->state |= VETH_STATE_RESET;
+ veth_kick_statemachine(cnx);
+ spin_unlock(&cnx->lock);
+ }
+
+ spin_unlock_irqrestore(&port->pending_gate, flags);
+}
+
+static struct net_device * __init veth_probe_one(int vlan, struct device *vdev)
+{
+ struct net_device *dev;
+ struct veth_port *port;
+ int i, rc;
+
+ dev = alloc_etherdev(sizeof (struct veth_port));
+ if (! dev) {
+ veth_error("Unable to allocate net_device structure!\n");
+ return NULL;
+ }
+
+ port = (struct veth_port *) dev->priv;
+
+ spin_lock_init(&port->pending_gate);
+ rwlock_init(&port->mcast_gate);
+
+ for (i = 0; i < HVMAXARCHITECTEDLPS; i++) {
+ HvLpVirtualLanIndexMap map;
+
+ if (i == this_lp)
+ continue;
+ map = HvLpConfig_getVirtualLanIndexMapForLp(i);
+ if (map & (0x8000 >> vlan))
+ port->lpar_map |= (1 << i);
+ }
+ port->dev = vdev;
+
+ dev->dev_addr[0] = 0x02;
+ dev->dev_addr[1] = 0x01;
+ dev->dev_addr[2] = 0xff;
+ dev->dev_addr[3] = vlan;
+ dev->dev_addr[4] = 0xff;
+ dev->dev_addr[5] = this_lp;
+
+ dev->mtu = VETH_MAX_MTU;
+
+ memcpy(&port->mac_addr, dev->dev_addr, 6);
+
+ dev->open = veth_open;
+ dev->hard_start_xmit = veth_start_xmit;
+ dev->stop = veth_close;
+ dev->get_stats = veth_get_stats;
+ dev->change_mtu = veth_change_mtu;
+ dev->set_mac_address = NULL;
+ dev->set_multicast_list = veth_set_multicast_list;
+ SET_ETHTOOL_OPS(dev, &ops);
+
+ dev->watchdog_timeo = 2 * (VETH_ACKTIMEOUT * HZ / 1000000);
+ dev->tx_timeout = veth_tx_timeout;
+
+ SET_NETDEV_DEV(dev, vdev);
+
+ rc = register_netdev(dev);
+ if (rc != 0) {
+ veth_printk(KERN_ERR,
+ "Failed to register ethernet device for vlan %d\n",
+ vlan);
+ free_netdev(dev);
+ return NULL;
+ }
+
+ veth_printk(KERN_DEBUG, "%s attached to iSeries vlan %d (lpar_map=0x%04x)\n",
+ dev->name, vlan, port->lpar_map);
+
+ return dev;
+}
+
+/*
+ * Tx path
+ */
+
+static int veth_transmit_to_one(struct sk_buff *skb, HvLpIndex rlp,
+ struct net_device *dev)
+{
+ struct veth_lpar_connection *cnx = veth_cnx[rlp];
+ struct veth_port *port = (struct veth_port *) dev->priv;
+ HvLpEvent_Rc rc;
+ u32 dma_address, dma_length;
+ struct veth_msg *msg = NULL;
+ int err = 0;
+ unsigned long flags;
+
+ if (! cnx) {
+ port->stats.tx_errors++;
+ dev_kfree_skb(skb);
+ return 0;
+ }
+
+ spin_lock_irqsave(&cnx->lock, flags);
+
+ if (! cnx->state & VETH_STATE_READY)
+ goto drop;
+
+ if ((skb->len - 14) > VETH_MAX_MTU)
+ goto drop;
+
+ msg = veth_stack_pop(cnx);
+
+ if (! msg) {
+ err = 1;
+ goto drop;
+ }
+
+ dma_length = skb->len;
+ dma_address = dma_map_single(port->dev, skb->data,
+ dma_length, DMA_TO_DEVICE);
+
+ if (dma_mapping_error(dma_address))
+ goto recycle_and_drop;
+
+ /* Is it really necessary to check the length and address
+ * fields of the first entry here? */
+ msg->skb = skb;
+ msg->dev = port->dev;
+ msg->data.addr[0] = dma_address;
+ msg->data.len[0] = dma_length;
+ msg->data.eofmask = 1 << VETH_EOF_SHIFT;
+ set_bit(0, &(msg->in_use));
+ rc = veth_signaldata(cnx, VethEventTypeFrames, msg->token, &msg->data);
+
+ if (rc != HvLpEvent_Rc_Good)
+ goto recycle_and_drop;
+
+ spin_unlock_irqrestore(&cnx->lock, flags);
+ return 0;
+
+ recycle_and_drop:
+ msg->skb = NULL;
+ /* need to set in use to make veth_recycle_msg in case this
+ * was a mapping failure */
+ set_bit(0, &msg->in_use);
+ veth_recycle_msg(cnx, msg);
+ drop:
+ port->stats.tx_errors++;
+ dev_kfree_skb(skb);
+ spin_unlock_irqrestore(&cnx->lock, flags);
+ return err;
+}
+
+static HvLpIndexMap veth_transmit_to_many(struct sk_buff *skb,
+ HvLpIndexMap lpmask,
+ struct net_device *dev)
+{
+ struct veth_port *port = (struct veth_port *) dev->priv;
+ int i;
+ int rc;
+
+ for (i = 0; i < HVMAXARCHITECTEDLPS; i++) {
+ if ((lpmask & (1 << i)) == 0)
+ continue;
+
+ rc = veth_transmit_to_one(skb_get(skb), i, dev);
+ if (! rc)
+ lpmask &= ~(1<<i);
+ }
+
+ if (! lpmask) {
+ port->stats.tx_packets++;
+ port->stats.tx_bytes += skb->len;
+ }
+
+ return lpmask;
+}
+
+static int veth_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ unsigned char *frame = skb->data;
+ struct veth_port *port = (struct veth_port *) dev->priv;
+ unsigned long flags;
+ HvLpIndexMap lpmask;
+
+ if (! (frame[0] & 0x01)) {
+ /* unicast packet */
+ HvLpIndex rlp = frame[5];
+
+ if ( ! ((1 << rlp) & port->lpar_map) ) {
+ dev_kfree_skb(skb);
+ return 0;
+ }
+
+ lpmask = 1 << rlp;
+ } else {
+ lpmask = port->lpar_map;
+ }
+
+ spin_lock_irqsave(&port->pending_gate, flags);
+
+ lpmask = veth_transmit_to_many(skb, lpmask, dev);
+
+ if (! lpmask) {
+ dev_kfree_skb(skb);
+ } else {
+ if (port->pending_skb) {
+ veth_error("%s: Tx while skb was pending!\n",
+ dev->name);
+ dev_kfree_skb(skb);
+ spin_unlock_irqrestore(&port->pending_gate, flags);
+ return 1;
+ }
+
+ port->pending_skb = skb;
+ port->pending_lpmask = lpmask;
+ netif_stop_queue(dev);
+ }
+
+ spin_unlock_irqrestore(&port->pending_gate, flags);
+
+ return 0;
+}
+
+static void veth_recycle_msg(struct veth_lpar_connection *cnx,
+ struct veth_msg *msg)
+{
+ u32 dma_address, dma_length;
+
+ if (test_and_clear_bit(0, &msg->in_use)) {
+ dma_address = msg->data.addr[0];
+ dma_length = msg->data.len[0];
+
+ dma_unmap_single(msg->dev, dma_address, dma_length,
+ DMA_TO_DEVICE);
+
+ if (msg->skb) {
+ dev_kfree_skb_any(msg->skb);
+ msg->skb = NULL;
+ }
+
+ memset(&msg->data, 0, sizeof(msg->data));
+ veth_stack_push(cnx, msg);
+ } else
+ if (cnx->state & VETH_STATE_OPEN)
+ veth_error("Bogus frames ack from lpar %d (#%d)\n",
+ cnx->remote_lp, msg->token);
+}
+
+static void veth_flush_pending(struct veth_lpar_connection *cnx)
+{
+ int i;
+ for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
+ struct net_device *dev = veth_dev[i];
+ struct veth_port *port;
+ unsigned long flags;
+
+ if (! dev)
+ continue;
+
+ port = (struct veth_port *)dev->priv;
+
+ if (! (port->lpar_map & (1<<cnx->remote_lp)))
+ continue;
+
+ spin_lock_irqsave(&port->pending_gate, flags);
+ if (port->pending_skb) {
+ port->pending_lpmask =
+ veth_transmit_to_many(port->pending_skb,
+ port->pending_lpmask,
+ dev);
+ if (! port->pending_lpmask) {
+ dev_kfree_skb_any(port->pending_skb);
+ port->pending_skb = NULL;
+ netif_wake_queue(dev);
+ }
+ }
+ spin_unlock_irqrestore(&port->pending_gate, flags);
+ }
+}
+
+/*
+ * Rx path
+ */
+
+static inline int veth_frame_wanted(struct veth_port *port, u64 mac_addr)
+{
+ int wanted = 0;
+ int i;
+ unsigned long flags;
+
+ if ( (mac_addr == port->mac_addr) || (mac_addr == 0xffffffffffff0000) )
+ return 1;
+
+ if (! (((char *) &mac_addr)[0] & 0x01))
+ return 0;
+
+ read_lock_irqsave(&port->mcast_gate, flags);
+
+ if (port->promiscuous || port->all_mcast) {
+ wanted = 1;
+ goto out;
+ }
+
+ for (i = 0; i < port->num_mcast; ++i) {
+ if (port->mcast_addr[i] == mac_addr) {
+ wanted = 1;
+ break;
+ }
+ }
+
+ out:
+ read_unlock_irqrestore(&port->mcast_gate, flags);
+
+ return wanted;
+}
+
+struct dma_chunk {
+ u64 addr;
+ u64 size;
+};
+
+#define VETH_MAX_PAGES_PER_FRAME ( (VETH_MAX_MTU+PAGE_SIZE-2)/PAGE_SIZE + 1 )
+
+static inline void veth_build_dma_list(struct dma_chunk *list,
+ unsigned char *p, unsigned long length)
+{
+ unsigned long done;
+ int i = 1;
+
+ /* FIXME: skbs are continguous in real addresses. Do we
+ * really need to break it into PAGE_SIZE chunks, or can we do
+ * it just at the granularity of iSeries real->absolute
+ * mapping? Indeed, given the way the allocator works, can we
+ * count on them being absolutely contiguous? */
+ list[0].addr = ISERIES_HV_ADDR(p);
+ list[0].size = min(length,
+ PAGE_SIZE - ((unsigned long)p & ~PAGE_MASK));
+
+ done = list[0].size;
+ while (done < length) {
+ list[i].addr = ISERIES_HV_ADDR(p + done);
+ list[i].size = min(length-done, PAGE_SIZE);
+ done += list[i].size;
+ i++;
+ }
+}
+
+static void veth_flush_acks(struct veth_lpar_connection *cnx)
+{
+ HvLpEvent_Rc rc;
+
+ rc = veth_signaldata(cnx, VethEventTypeFramesAck,
+ 0, &cnx->pending_acks);
+
+ if (rc != HvLpEvent_Rc_Good)
+ veth_error("Error 0x%x acking frames from lpar %d!\n",
+ (unsigned)rc, cnx->remote_lp);
+
+ cnx->num_pending_acks = 0;
+ memset(&cnx->pending_acks, 0xff, sizeof(cnx->pending_acks));
+}
+
+static void veth_receive(struct veth_lpar_connection *cnx,
+ struct VethLpEvent *event)
+{
+ struct VethFramesData *senddata = &event->u.frames_data;
+ int startchunk = 0;
+ int nchunks;
+ unsigned long flags;
+ HvLpDma_Rc rc;
+
+ do {
+ u16 length = 0;
+ struct sk_buff *skb;
+ struct dma_chunk local_list[VETH_MAX_PAGES_PER_FRAME];
+ struct dma_chunk remote_list[VETH_MAX_FRAMES_PER_MSG];
+ u64 dest;
+ HvLpVirtualLanIndex vlan;
+ struct net_device *dev;
+ struct veth_port *port;
+
+ /* FIXME: do we need this? */
+ memset(local_list, 0, sizeof(local_list));
+ memset(remote_list, 0, sizeof(VETH_MAX_FRAMES_PER_MSG));
+
+ /* a 0 address marks the end of the valid entries */
+ if (senddata->addr[startchunk] == 0)
+ break;
+
+ /* make sure that we have at least 1 EOF entry in the
+ * remaining entries */
+ if (! (senddata->eofmask >> (startchunk + VETH_EOF_SHIFT))) {
+ veth_error("missing EOF frag in event "
+ "eofmask=0x%x startchunk=%d\n",
+ (unsigned) senddata->eofmask, startchunk);
+ break;
+ }
+
+ /* build list of chunks in this frame */
+ nchunks = 0;
+ do {
+ remote_list[nchunks].addr =
+ (u64) senddata->addr[startchunk+nchunks] << 32;
+ remote_list[nchunks].size =
+ senddata->len[startchunk+nchunks];
+ length += remote_list[nchunks].size;
+ } while (! (senddata->eofmask &
+ (1 << (VETH_EOF_SHIFT + startchunk + nchunks++))));
+
+ /* length == total length of all chunks */
+ /* nchunks == # of chunks in this frame */
+
+ if ((length - ETH_HLEN) > VETH_MAX_MTU) {
+ veth_error("Received oversize frame from lpar %d "
+ "(length=%d)\n", cnx->remote_lp, length);
+ continue;
+ }
+
+ skb = alloc_skb(length, GFP_ATOMIC);
+ if (!skb)
+ continue;
+
+ veth_build_dma_list(local_list, skb->data, length);
+
+ rc = HvCallEvent_dmaBufList(HvLpEvent_Type_VirtualLan,
+ event->base_event.xSourceLp,
+ HvLpDma_Direction_RemoteToLocal,
+ cnx->src_inst,
+ cnx->dst_inst,
+ HvLpDma_AddressType_RealAddress,
+ HvLpDma_AddressType_TceIndex,
+ ISERIES_HV_ADDR(&local_list),
+ ISERIES_HV_ADDR(&remote_list),
+ length);
+ if (rc != HvLpDma_Rc_Good) {
+ dev_kfree_skb_irq(skb);
+ continue;
+ }
+
+ vlan = skb->data[9];
+ dev = veth_dev[vlan];
+ if (! dev)
+ /* Some earlier versions of the driver sent
+ broadcasts down all connections, even to
+ lpars that weren't on the relevant vlan.
+ So ignore packets belonging to a vlan we're
+ not on. */
+ continue;
+
+ port = (struct veth_port *)dev->priv;
+ dest = *((u64 *) skb->data) & 0xFFFFFFFFFFFF0000;
+
+ if ((vlan > HVMAXARCHITECTEDVIRTUALLANS) || !port) {
+ dev_kfree_skb_irq(skb);
+ continue;
+ }
+ if (! veth_frame_wanted(port, dest)) {
+ dev_kfree_skb_irq(skb);
+ continue;
+ }
+
+ skb_put(skb, length);
+ skb->dev = dev;
+ skb->protocol = eth_type_trans(skb, dev);
+ skb->ip_summed = CHECKSUM_NONE;
+ netif_rx(skb); /* send it up */
+ port->stats.rx_packets++;
+ port->stats.rx_bytes += length;
+ } while (startchunk += nchunks, startchunk < VETH_MAX_FRAMES_PER_MSG);
+
+ /* Ack it */
+ spin_lock_irqsave(&cnx->lock, flags);
+ BUG_ON(cnx->num_pending_acks > VETH_MAX_ACKS_PER_MSG);
+
+ cnx->pending_acks[cnx->num_pending_acks++] =
+ event->base_event.xCorrelationToken;
+
+ if ( (cnx->num_pending_acks >= cnx->remote_caps.ack_threshold)
+ || (cnx->num_pending_acks >= VETH_MAX_ACKS_PER_MSG) )
+ veth_flush_acks(cnx);
+
+ spin_unlock_irqrestore(&cnx->lock, flags);
+}
+
+static void veth_timed_ack(unsigned long ptr)
+{
+ struct veth_lpar_connection *cnx = (struct veth_lpar_connection *) ptr;
+ unsigned long flags;
+
+ /* Ack all the events */
+ spin_lock_irqsave(&cnx->lock, flags);
+ if (cnx->num_pending_acks > 0)
+ veth_flush_acks(cnx);
+
+ /* Reschedule the timer */
+ cnx->ack_timer.expires = jiffies + cnx->ack_timeout;
+ add_timer(&cnx->ack_timer);
+ spin_unlock_irqrestore(&cnx->lock, flags);
+}
+
+static int veth_remove(struct vio_dev *vdev)
+{
+ int i = vdev->unit_address;
+ struct net_device *dev;
+
+ dev = veth_dev[i];
+ if (dev != NULL) {
+ veth_dev[i] = NULL;
+ unregister_netdev(dev);
+ free_netdev(dev);
+ }
+ return 0;
+}
+
+static int veth_probe(struct vio_dev *vdev, const struct vio_device_id *id)
+{
+ int i = vdev->unit_address;
+ struct net_device *dev;
+
+ dev = veth_probe_one(i, &vdev->dev);
+ if (dev == NULL) {
+ veth_remove(vdev);
+ return 1;
+ }
+ veth_dev[i] = dev;
+
+ /* Start the state machine on each connection, to commence
+ * link negotiation */
+ for (i = 0; i < HVMAXARCHITECTEDLPS; i++)
+ if (veth_cnx[i])
+ veth_kick_statemachine(veth_cnx[i]);
+
+ return 0;
+}
+
+/**
+ * veth_device_table: Used by vio.c to match devices that we
+ * support.
+ */
+static struct vio_device_id veth_device_table[] __devinitdata = {
+ { "vlan", "" },
+ { NULL, NULL }
+};
+MODULE_DEVICE_TABLE(vio, veth_device_table);
+
+static struct vio_driver veth_driver = {
+ .name = "iseries_veth",
+ .id_table = veth_device_table,
+ .probe = veth_probe,
+ .remove = veth_remove
+};
+
+/*
+ * Module initialization/cleanup
+ */
+
+void __exit veth_module_cleanup(void)
+{
+ int i;
+
+ vio_unregister_driver(&veth_driver);
+
+ for (i = 0; i < HVMAXARCHITECTEDLPS; ++i)
+ veth_stop_connection(i);
+
+ HvLpEvent_unregisterHandler(HvLpEvent_Type_VirtualLan);
+
+ /* Hypervisor callbacks may have scheduled more work while we
+ * were destroying connections. Now that we've disconnected from
+ * the hypervisor make sure everything's finished. */
+ flush_scheduled_work();
+
+ for (i = 0; i < HVMAXARCHITECTEDLPS; ++i)
+ veth_destroy_connection(i);
+
+}
+module_exit(veth_module_cleanup);
+
+int __init veth_module_init(void)
+{
+ int i;
+ int rc;
+
+ this_lp = HvLpConfig_getLpIndex_outline();
+
+ for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) {
+ rc = veth_init_connection(i);
+ if (rc != 0) {
+ veth_module_cleanup();
+ return rc;
+ }
+ }
+
+ HvLpEvent_registerHandler(HvLpEvent_Type_VirtualLan,
+ &veth_handle_event);
+
+ return vio_register_driver(&veth_driver);
+}
+module_init(veth_module_init);
