2 * Copyright (c) 2010-2012 Citrix Inc.
3 * Copyright (c) 2009-2012 Microsoft Corp.
4 * Copyright (c) 2012 NetApp Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 * Copyright (c) 2004-2006 Kip Macy
31 * All rights reserved.
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
36 * 1. Redistributions of source code must retain the above copyright
37 * notice, this list of conditions and the following disclaimer.
38 * 2. Redistributions in binary form must reproduce the above copyright
39 * notice, this list of conditions and the following disclaimer in the
40 * documentation and/or other materials provided with the distribution.
42 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
43 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
44 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
45 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
46 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
47 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
48 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
49 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
50 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
51 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
55 #include <sys/cdefs.h>
56 __FBSDID("$FreeBSD$");
58 #include <sys/param.h>
59 #include <sys/systm.h>
60 #include <sys/sockio.h>
62 #include <sys/malloc.h>
63 #include <sys/module.h>
64 #include <sys/kernel.h>
65 #include <sys/socket.h>
66 #include <sys/queue.h>
71 #include <net/if_arp.h>
72 #include <net/ethernet.h>
73 #include <net/if_dl.h>
74 #include <net/if_media.h>
78 #include <net/if_var.h>
79 #include <net/if_types.h>
80 #include <net/if_vlan_var.h>
82 #include <netinet/in_systm.h>
83 #include <netinet/in.h>
84 #include <netinet/ip.h>
85 #include <netinet/if_ether.h>
88 #include <vm/vm_param.h>
89 #include <vm/vm_kern.h>
92 #include <machine/bus.h>
93 #include <machine/resource.h>
94 #include <machine/frame.h>
95 #include <machine/vmparam.h>
99 #include <sys/mutex.h>
100 #include <sys/errno.h>
101 #include <sys/types.h>
102 #include <machine/atomic.h>
104 #include <machine/intr_machdep.h>
106 #include <dev/hyperv/include/hyperv.h>
107 #include "hv_net_vsc.h"
108 #include "hv_rndis.h"
109 #include "hv_rndis_filter.h"
112 /* Short for Hyper-V network interface */
113 #define NETVSC_DEVNAME "hn"
116 * It looks like offset 0 of buf is reserved to hold the softc pointer.
117 * The sc pointer evidently not needed, and is not presently populated.
118 * The packet offset is where the netvsc_packet starts in the buffer.
120 #define HV_NV_SC_PTR_OFFSET_IN_BUF 0
121 #define HV_NV_PACKET_OFFSET_IN_BUF 16
128 struct hv_netvsc_driver_context {
133 * Be aware that this sleepable mutex will exhibit WITNESS errors when
134 * certain TCP and ARP code paths are taken. This appears to be a
135 * well-known condition, as all other drivers checked use a sleeping
136 * mutex to protect their transmit paths.
137 * Also Be aware that mutexes do not play well with semaphores, and there
138 * is a conflicting semaphore in a certain channel code path.
140 #define NV_LOCK_INIT(_sc, _name) \
141 mtx_init(&(_sc)->hn_lock, _name, MTX_NETWORK_LOCK, MTX_DEF)
142 #define NV_LOCK(_sc) mtx_lock(&(_sc)->hn_lock)
143 #define NV_LOCK_ASSERT(_sc) mtx_assert(&(_sc)->hn_lock, MA_OWNED)
144 #define NV_UNLOCK(_sc) mtx_unlock(&(_sc)->hn_lock)
145 #define NV_LOCK_DESTROY(_sc) mtx_destroy(&(_sc)->hn_lock)
152 int hv_promisc_mode = 0; /* normal mode by default */
154 /* The one and only one */
155 static struct hv_netvsc_driver_context g_netvsc_drv;
159 * Forward declarations
161 static void hn_stop(hn_softc_t *sc);
162 static void hn_ifinit_locked(hn_softc_t *sc);
163 static void hn_ifinit(void *xsc);
164 static int hn_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
165 static int hn_start_locked(struct ifnet *ifp);
166 static void hn_start(struct ifnet *ifp);
170 * NetVsc driver initialization
171 * Note: Filter init is no longer required
174 netvsc_drv_init(void)
180 * NetVsc global initialization entry point
186 printf("Netvsc initializing... ");
189 * XXXKYS: cleanup initialization
191 if (!cold && !g_netvsc_drv.drv_inited) {
192 g_netvsc_drv.drv_inited = 1;
196 } else if (bootverbose)
197 printf("Already initialized!\n");
200 /* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */
201 static const hv_guid g_net_vsc_device_type = {
202 .data = {0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46,
203 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E}
207 * Standard probe entry point.
211 netvsc_probe(device_t dev)
215 p = vmbus_get_type(dev);
216 if (!memcmp(p, &g_net_vsc_device_type.data, sizeof(hv_guid))) {
217 device_set_desc(dev, "Synthetic Network Interface");
219 printf("Netvsc probe... DONE \n");
221 return (BUS_PROBE_DEFAULT);
228 * Standard attach entry point.
230 * Called when the driver is loaded. It allocates needed resources,
231 * and initializes the "hardware" and software.
234 netvsc_attach(device_t dev)
236 struct hv_device *device_ctx = vmbus_get_devctx(dev);
237 netvsc_device_info device_info;
239 int unit = device_get_unit(dev);
245 sc = device_get_softc(dev);
250 bzero(sc, sizeof(hn_softc_t));
254 NV_LOCK_INIT(sc, "NetVSCLock");
256 sc->hn_dev_obj = device_ctx;
258 ifp = sc->hn_ifp = if_alloc(IFT_ETHER);
261 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
262 ifp->if_dunit = unit;
263 ifp->if_dname = NETVSC_DEVNAME;
265 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
266 ifp->if_ioctl = hn_ioctl;
267 ifp->if_start = hn_start;
268 ifp->if_init = hn_ifinit;
269 /* needed by hv_rf_on_device_add() code */
270 ifp->if_mtu = ETHERMTU;
271 IFQ_SET_MAXLEN(&ifp->if_snd, 512);
272 ifp->if_snd.ifq_drv_maxlen = 511;
273 IFQ_SET_READY(&ifp->if_snd);
276 * Tell upper layers that we support full VLAN capability.
278 ifp->if_hdrlen = sizeof(struct ether_vlan_header);
279 ifp->if_capabilities |= IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU;
280 ifp->if_capenable |= IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU;
282 ret = hv_rf_on_device_add(device_ctx, &device_info);
288 if (device_info.link_state == 0) {
292 ether_ifattach(ifp, device_info.mac_addr);
298 * Standard detach entry point
301 netvsc_detach(device_t dev)
303 struct hv_device *hv_device = vmbus_get_devctx(dev);
306 printf("netvsc_detach\n");
309 * XXXKYS: Need to clean up all our
310 * driver state; this is the driver
315 * XXXKYS: Need to stop outgoing traffic and unregister
319 hv_rf_on_device_remove(hv_device, HV_RF_NV_DESTROY_CHANNEL);
325 * Standard shutdown entry point
328 netvsc_shutdown(device_t dev)
334 * Send completion processing
336 * Note: It looks like offset 0 of buf is reserved to hold the softc
337 * pointer. The sc pointer is not currently needed in this function, and
338 * it is not presently populated by the TX function.
341 netvsc_xmit_completion(void *context)
343 netvsc_packet *packet = (netvsc_packet *)context;
347 mb = (struct mbuf *)(uintptr_t)packet->compl.send.send_completion_tid;
348 buf = ((uint8_t *)packet) - HV_NV_PACKET_OFFSET_IN_BUF;
358 * Start a transmit of one or more packets
361 hn_start_locked(struct ifnet *ifp)
363 hn_softc_t *sc = ifp->if_softc;
364 struct hv_device *device_ctx = vmbus_get_devctx(sc->hn_dev);
366 netvsc_packet *packet;
367 struct mbuf *m_head, *m;
368 struct mbuf *mc_head = NULL;
377 while (!IFQ_DRV_IS_EMPTY(&sc->hn_ifp->if_snd)) {
378 IFQ_DRV_DEQUEUE(&sc->hn_ifp->if_snd, m_head);
379 if (m_head == NULL) {
387 /* Walk the mbuf list computing total length and num frags */
388 for (m = m_head; m != NULL; m = m->m_next) {
396 * Reserve the number of pages requested. Currently,
397 * one page is reserved for the message in the RNDIS
400 num_frags += HV_RF_NUM_TX_RESERVED_PAGE_BUFS;
402 /* If exceeds # page_buffers in netvsc_packet */
403 if (num_frags > NETVSC_PACKET_MAXPAGE) {
410 if (m_head->m_flags & M_VLANTAG) {
411 rppi_size = sizeof(rndis_per_packet_info) +
412 sizeof(ndis_8021q_info);
416 * Allocate a buffer with space for a netvsc packet plus a
417 * number of reserved areas. First comes a (currently 16
418 * bytes, currently unused) reserved data area. Second is
419 * the netvsc_packet, which includes (currently 4) page
420 * buffers. Third (optional) is a rndis_per_packet_info
421 * struct, but only if a VLAN tag should be inserted into the
422 * Ethernet frame by the Hyper-V infrastructure. Fourth is
423 * an area reserved for an rndis_filter_packet struct.
424 * Changed malloc to M_NOWAIT to avoid sleep under spin lock.
425 * No longer reserving extra space for page buffers, as they
426 * are already part of the netvsc_packet.
428 buf = malloc(HV_NV_PACKET_OFFSET_IN_BUF +
429 sizeof(netvsc_packet) + rppi_size +
430 sizeof(rndis_filter_packet),
431 M_DEVBUF, M_ZERO | M_NOWAIT);
438 packet = (netvsc_packet *)(buf + HV_NV_PACKET_OFFSET_IN_BUF);
439 *(vm_offset_t *)buf = HV_NV_SC_PTR_OFFSET_IN_BUF;
442 * extension points to the area reserved for the
443 * rndis_filter_packet, which is placed just after
444 * the netvsc_packet (and rppi struct, if present;
445 * length is updated later).
447 packet->extension = packet + 1;
449 /* Set up the rndis header */
450 packet->page_buf_count = num_frags;
452 /* Initialize it from the mbuf */
453 packet->tot_data_buf_len = len;
456 * If the Hyper-V infrastructure needs to embed a VLAN tag,
457 * initialize netvsc_packet and rppi struct values as needed.
460 /* Lower layers need the VLAN TCI */
461 packet->vlan_tci = m_head->m_pkthdr.ether_vtag;
465 * Fill the page buffers with mbuf info starting at index
466 * HV_RF_NUM_TX_RESERVED_PAGE_BUFS.
468 i = HV_RF_NUM_TX_RESERVED_PAGE_BUFS;
469 for (m = m_head; m != NULL; m = m->m_next) {
472 vtophys(mtod(m, vm_offset_t));
473 packet->page_buffers[i].pfn =
475 packet->page_buffers[i].offset =
476 paddr & (PAGE_SIZE - 1);
477 packet->page_buffers[i].length = m->m_len;
483 * If bpf, copy the mbuf chain. This is less expensive than
484 * it appears; the mbuf clusters are not copied, only their
485 * reference counts are incremented.
486 * Needed to avoid a race condition where the completion
487 * callback is invoked, freeing the mbuf chain, before the
488 * bpf_mtap code has a chance to run.
491 mc_head = m_copypacket(m_head, M_NOWAIT);
494 /* Set the completion routine */
495 packet->compl.send.on_send_completion = netvsc_xmit_completion;
496 packet->compl.send.send_completion_context = packet;
497 packet->compl.send.send_completion_tid = (uint64_t)(uintptr_t)m_head;
499 /* Removed critical_enter(), does not appear necessary */
500 ret = hv_rf_on_send(device_ctx, packet);
503 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
504 /* if bpf && mc_head, call bpf_mtap code */
506 ETHER_BPF_MTAP(ifp, mc_head);
514 IF_PREPEND(&ifp->if_snd, m_head);
515 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
518 * Null the mbuf pointer so the completion function
519 * does not free the mbuf chain. We just pushed the
520 * mbuf chain back on the if_snd queue.
522 packet->compl.send.send_completion_tid = 0;
525 * Release the resources since we will not get any
528 netvsc_xmit_completion(packet);
531 /* if bpf && mc_head, free the mbuf chain copy */
541 * Link up/down notification
544 netvsc_linkstatus_callback(struct hv_device *device_obj, uint32_t status)
546 hn_softc_t *sc = device_get_softc(device_obj->device);
560 * Append the specified data to the indicated mbuf chain,
561 * Extend the mbuf chain if the new data does not fit in
564 * This is a minor rewrite of m_append() from sys/kern/uipc_mbuf.c.
565 * There should be an equivalent in the kernel mbuf code,
566 * but there does not appear to be one yet.
568 * Differs from m_append() in that additional mbufs are
569 * allocated with cluster size MJUMPAGESIZE, and filled
572 * Return 1 if able to complete the job; otherwise 0.
575 hv_m_append(struct mbuf *m0, int len, c_caddr_t cp)
578 int remainder, space;
580 for (m = m0; m->m_next != NULL; m = m->m_next)
583 space = M_TRAILINGSPACE(m);
586 * Copy into available space.
588 if (space > remainder)
590 bcopy(cp, mtod(m, caddr_t) + m->m_len, space);
595 while (remainder > 0) {
597 * Allocate a new mbuf; could check space
598 * and allocate a cluster instead.
600 n = m_getjcl(M_NOWAIT, m->m_type, 0, MJUMPAGESIZE);
603 n->m_len = min(MJUMPAGESIZE, remainder);
604 bcopy(cp, mtod(n, caddr_t), n->m_len);
606 remainder -= n->m_len;
610 if (m0->m_flags & M_PKTHDR)
611 m0->m_pkthdr.len += len - remainder;
613 return (remainder == 0);
618 * Called when we receive a data packet from the "wire" on the
621 * Note: This is no longer used as a callback
624 netvsc_recv(struct hv_device *device_ctx, netvsc_packet *packet)
626 hn_softc_t *sc = (hn_softc_t *)device_get_softc(device_ctx->device);
633 return (0); /* TODO: KYS how can this be! */
638 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
643 * Bail out if packet contains more data than configured MTU.
645 if (packet->tot_data_buf_len > (ifp->if_mtu + ETHER_HDR_LEN)) {
650 * Get an mbuf with a cluster. For packets 2K or less,
651 * get a standard 2K cluster. For anything larger, get a
652 * 4K cluster. Any buffers larger than 4K can cause problems
653 * if looped around to the Hyper-V TX channel, so avoid them.
657 if (packet->tot_data_buf_len > MCLBYTES) {
662 m_new = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, size);
668 * Remove trailing junk from RX data buffer.
669 * Fixme: This will not work for multiple Hyper-V RX buffers.
670 * Fortunately, the channel gathers all RX data into one buffer.
672 * L2 frame length, with L2 header, not including CRC
674 packet->page_buffers[0].length = packet->tot_data_buf_len;
677 * Copy the received packet to one or more mbufs.
678 * The copy is required since the memory pointed to by netvsc_packet
679 * cannot be deallocated
681 for (i=0; i < packet->page_buf_count; i++) {
682 /* Shift virtual page number to form virtual page address */
683 uint8_t *vaddr = (uint8_t *)(uintptr_t)
684 (packet->page_buffers[i].pfn << PAGE_SHIFT);
686 hv_m_append(m_new, packet->page_buffers[i].length,
687 vaddr + packet->page_buffers[i].offset);
690 m_new->m_pkthdr.rcvif = ifp;
692 if ((packet->vlan_tci != 0) &&
693 (ifp->if_capenable & IFCAP_VLAN_HWTAGGING) != 0) {
694 m_new->m_pkthdr.ether_vtag = packet->vlan_tci;
695 m_new->m_flags |= M_VLANTAG;
699 * Note: Moved RX completion back to hv_nv_on_receive() so all
700 * messages (not just data messages) will trigger a response.
703 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
705 /* We're not holding the lock here, so don't release it */
706 (*ifp->if_input)(ifp, m_new);
712 * Rules for using sc->temp_unusable:
713 * 1. sc->temp_unusable can only be read or written while holding NV_LOCK()
714 * 2. code reading sc->temp_unusable under NV_LOCK(), and finding
715 * sc->temp_unusable set, must release NV_LOCK() and exit
716 * 3. to retain exclusive control of the interface,
717 * sc->temp_unusable must be set by code before releasing NV_LOCK()
718 * 4. only code setting sc->temp_unusable can clear sc->temp_unusable
719 * 5. code setting sc->temp_unusable must eventually clear sc->temp_unusable
723 * Standard ioctl entry point. Called when the user wants to configure
727 hn_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
729 hn_softc_t *sc = ifp->if_softc;
730 struct ifreq *ifr = (struct ifreq *)data;
731 netvsc_device_info device_info;
732 struct hv_device *hn_dev;
740 error = ether_ioctl(ifp, cmd, data);
743 hn_dev = vmbus_get_devctx(sc->hn_dev);
745 /* Check MTU value change */
746 if (ifp->if_mtu == ifr->ifr_mtu)
749 if (ifr->ifr_mtu > NETVSC_MAX_CONFIGURABLE_MTU) {
754 /* Obtain and record requested MTU */
755 ifp->if_mtu = ifr->ifr_mtu;
759 if (!sc->temp_unusable) {
760 sc->temp_unusable = TRUE;
768 } while (retry_cnt > 0);
770 if (retry_cnt == 0) {
775 /* We must remove and add back the device to cause the new
776 * MTU to take effect. This includes tearing down, but not
777 * deleting the channel, then bringing it back up.
779 error = hv_rf_on_device_remove(hn_dev, HV_RF_NV_RETAIN_CHANNEL);
782 sc->temp_unusable = FALSE;
786 error = hv_rf_on_device_add(hn_dev, &device_info);
789 sc->temp_unusable = FALSE;
794 hn_ifinit_locked(sc);
797 sc->temp_unusable = FALSE;
803 if (!sc->temp_unusable) {
804 sc->temp_unusable = TRUE;
812 } while (retry_cnt > 0);
814 if (retry_cnt == 0) {
819 if (ifp->if_flags & IFF_UP) {
821 * If only the state of the PROMISC flag changed,
822 * then just use the 'set promisc mode' command
823 * instead of reinitializing the entire NIC. Doing
824 * a full re-init means reloading the firmware and
825 * waiting for it to start up, which may take a
829 /* Fixme: Promiscuous mode? */
830 if (ifp->if_drv_flags & IFF_DRV_RUNNING &&
831 ifp->if_flags & IFF_PROMISC &&
832 !(sc->hn_if_flags & IFF_PROMISC)) {
833 /* do something here for Hyper-V */
834 } else if (ifp->if_drv_flags & IFF_DRV_RUNNING &&
835 !(ifp->if_flags & IFF_PROMISC) &&
836 sc->hn_if_flags & IFF_PROMISC) {
837 /* do something here for Hyper-V */
840 hn_ifinit_locked(sc);
842 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
847 sc->temp_unusable = FALSE;
849 sc->hn_if_flags = ifp->if_flags;
853 mask = ifr->ifr_reqcap ^ ifp->if_capenable;
854 if (mask & IFCAP_HWCSUM) {
855 if (IFCAP_HWCSUM & ifp->if_capenable) {
856 ifp->if_capenable &= ~IFCAP_HWCSUM;
858 ifp->if_capenable |= IFCAP_HWCSUM;
866 /* Fixme: Multicast mode? */
867 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
880 error = ether_ioctl(ifp, cmd, data);
891 hn_stop(hn_softc_t *sc)
895 struct hv_device *device_ctx = vmbus_get_devctx(sc->hn_dev);
900 printf(" Closing Device ...\n");
902 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
905 ret = hv_rf_on_close(device_ctx);
909 * FreeBSD transmit entry point
912 hn_start(struct ifnet *ifp)
918 if (sc->temp_unusable) {
922 hn_start_locked(ifp);
930 hn_ifinit_locked(hn_softc_t *sc)
933 struct hv_device *device_ctx = vmbus_get_devctx(sc->hn_dev);
938 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
944 ret = hv_rf_on_open(device_ctx);
950 ifp->if_drv_flags |= IFF_DRV_RUNNING;
951 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
960 hn_softc_t *sc = xsc;
963 if (sc->temp_unusable) {
967 sc->temp_unusable = TRUE;
970 hn_ifinit_locked(sc);
973 sc->temp_unusable = FALSE;
982 hn_watchdog(struct ifnet *ifp)
987 printf("hn%d: watchdog timeout -- resetting\n", sc->hn_unit);
988 hn_ifinit(sc); /*???*/
989 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
993 static device_method_t netvsc_methods[] = {
994 /* Device interface */
995 DEVMETHOD(device_probe, netvsc_probe),
996 DEVMETHOD(device_attach, netvsc_attach),
997 DEVMETHOD(device_detach, netvsc_detach),
998 DEVMETHOD(device_shutdown, netvsc_shutdown),
1003 static driver_t netvsc_driver = {
1009 static devclass_t netvsc_devclass;
1011 DRIVER_MODULE(hn, vmbus, netvsc_driver, netvsc_devclass, 0, 0);
1012 MODULE_VERSION(hn, 1);
1013 MODULE_DEPEND(hn, vmbus, 1, 1, 1);
1014 SYSINIT(netvsc_initx, SI_SUB_KTHREAD_IDLE, SI_ORDER_MIDDLE + 1, netvsc_init,