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Code Issues Releases Activity

hyperv/hn: Regroup ifnet setup code.

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While I'm here, add comment along the attach DEVMETHOD.

MFC after:	1 week
Sponsored by:	Microsoft
Differential Revision:	https://reviews.freebsd.org/D7874
This commit is contained in:
Sepherosa Ziehau 2016-09-18 07:37:59 +00:00
parent a5ec35dfee
commit 174e02e003
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=305923
1 changed files with 64 additions and 42 deletions
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106
sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
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@ -456,6 +456,9 @@ netvsc_attach(device_t dev)
sc->hn_prichan = vmbus_get_channel(dev); sc->hn_prichan = vmbus_get_channel(dev);
HN_LOCK_INIT(sc); HN_LOCK_INIT(sc);
/*
* Setup taskqueue for transmission.
*/
if (hn_tx_taskq == NULL) { if (hn_tx_taskq == NULL) {
sc->hn_tx_taskq = taskqueue_create("hn_tx", M_WAITOK, sc->hn_tx_taskq = taskqueue_create("hn_tx", M_WAITOK,
taskqueue_thread_enqueue, &sc->hn_tx_taskq); taskqueue_thread_enqueue, &sc->hn_tx_taskq);
@ -477,10 +480,21 @@ netvsc_attach(device_t dev)
sc->hn_tx_taskq = hn_tx_taskq; sc->hn_tx_taskq = hn_tx_taskq;
} }
/*
* Allocate ifnet and setup its name earlier, so that if_printf
* can be used by functions, which will be called after
* ether_ifattach().
*/
ifp = sc->hn_ifp = if_alloc(IFT_ETHER); ifp = sc->hn_ifp = if_alloc(IFT_ETHER);
ifp->if_softc = sc; ifp->if_softc = sc;
if_initname(ifp, device_get_name(dev), device_get_unit(dev)); if_initname(ifp, device_get_name(dev), device_get_unit(dev));
/*
* Initialize ifmedia earlier so that it can be unconditionally
* destroyed, if error happened later on.
*/
ifmedia_init(&sc->hn_media, 0, hn_ifmedia_upd, hn_ifmedia_sts);
/* /*
* Figure out the # of RX rings (ring_cnt) and the # of TX rings * Figure out the # of RX rings (ring_cnt) and the # of TX rings
* to use (tx_ring_cnt). * to use (tx_ring_cnt).
@ -511,6 +525,10 @@ netvsc_attach(device_t dev)
*/ */
sc->hn_cpu = atomic_fetchadd_int(&hn_cpu_index, ring_cnt) % mp_ncpus; sc->hn_cpu = atomic_fetchadd_int(&hn_cpu_index, ring_cnt) % mp_ncpus;
/*
* Create enough TX/RX rings, even if only limited number of
* channels can be allocated.
*/
error = hn_create_tx_data(sc, tx_ring_cnt); error = hn_create_tx_data(sc, tx_ring_cnt);
if (error) if (error)
goto failed; goto failed;
@ -533,6 +551,51 @@ netvsc_attach(device_t dev)
if (error) if (error)
goto failed; goto failed;
error = hn_rndis_get_linkstatus(sc, &link_status);
if (error)
goto failed;
if (link_status == NDIS_MEDIA_STATE_CONNECTED)
sc->hn_carrier = 1;
error = hn_rndis_get_eaddr(sc, eaddr);
if (error)
goto failed;
#if __FreeBSD_version >= 1100099
if (sc->hn_rx_ring_inuse > 1) {
/*
* Reduce TCP segment aggregation limit for multiple
* RX rings to increase ACK timeliness.
*/
hn_set_lro_lenlim(sc, HN_LRO_LENLIM_MULTIRX_DEF);
}
#endif
hn_set_chim_size(sc, sc->hn_chim_szmax);
if (hn_tx_chimney_size > 0 &&
hn_tx_chimney_size < sc->hn_chim_szmax)
hn_set_chim_size(sc, hn_tx_chimney_size);
ctx = device_get_sysctl_ctx(dev);
child = SYSCTL_CHILDREN(device_get_sysctl_tree(dev));
SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "nvs_version", CTLFLAG_RD,
&sc->hn_nvs_ver, 0, "NVS version");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "ndis_version",
CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
hn_ndis_version_sysctl, "A", "NDIS version");
/*
* Setup the ifmedia, which has been initialized earlier.
*/
ifmedia_add(&sc->hn_media, IFM_ETHER | IFM_AUTO, 0, NULL);
ifmedia_set(&sc->hn_media, IFM_ETHER | IFM_AUTO);
/* XXX ifmedia_set really should do this for us */
sc->hn_media.ifm_media = sc->hn_media.ifm_cur->ifm_media;
/*
* Setup the ifnet for this interface.
*/
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_ioctl = hn_ioctl; ifp->if_ioctl = hn_ioctl;
ifp->if_init = hn_init; ifp->if_init = hn_init;
@ -548,15 +611,6 @@ netvsc_attach(device_t dev)
ifp->if_qflush = hn_xmit_qflush; ifp->if_qflush = hn_xmit_qflush;
} }
ifmedia_init(&sc->hn_media, 0, hn_ifmedia_upd, hn_ifmedia_sts);
ifmedia_add(&sc->hn_media, IFM_ETHER | IFM_AUTO, 0, NULL);
ifmedia_set(&sc->hn_media, IFM_ETHER | IFM_AUTO);
/* XXX ifmedia_set really should do this for us */
sc->hn_media.ifm_media = sc->hn_media.ifm_cur->ifm_media;
/*
* Tell upper layers that we support full VLAN capability.
*/
ifp->if_capabilities |= ifp->if_capabilities |=
IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU | IFCAP_HWCSUM | IFCAP_TSO | IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU | IFCAP_HWCSUM | IFCAP_TSO |
IFCAP_LRO; IFCAP_LRO;
@ -565,34 +619,14 @@ netvsc_attach(device_t dev)
IFCAP_LRO; IFCAP_LRO;
ifp->if_hwassist = sc->hn_tx_ring[0].hn_csum_assist | CSUM_TSO; ifp->if_hwassist = sc->hn_tx_ring[0].hn_csum_assist | CSUM_TSO;
#if __FreeBSD_version >= 1100099
if (sc->hn_rx_ring_inuse > 1) {
/*
* Reduce TCP segment aggregation limit for multiple
* RX rings to increase ACK timeliness.
*/
hn_set_lro_lenlim(sc, HN_LRO_LENLIM_MULTIRX_DEF);
}
#endif
error = hn_rndis_get_linkstatus(sc, &link_status);
if (error)
goto failed;
if (link_status == NDIS_MEDIA_STATE_CONNECTED)
sc->hn_carrier = 1;
tso_maxlen = hn_tso_maxlen; tso_maxlen = hn_tso_maxlen;
if (tso_maxlen <= 0 || tso_maxlen > IP_MAXPACKET) if (tso_maxlen <= 0 || tso_maxlen > IP_MAXPACKET)
tso_maxlen = IP_MAXPACKET; tso_maxlen = IP_MAXPACKET;
ifp->if_hw_tsomaxsegcount = HN_TX_DATA_SEGCNT_MAX; ifp->if_hw_tsomaxsegcount = HN_TX_DATA_SEGCNT_MAX;
ifp->if_hw_tsomaxsegsize = PAGE_SIZE; ifp->if_hw_tsomaxsegsize = PAGE_SIZE;
ifp->if_hw_tsomax = tso_maxlen - ifp->if_hw_tsomax = tso_maxlen -
(ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN); (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN);
error = hn_rndis_get_eaddr(sc, eaddr);
if (error)
goto failed;
ether_ifattach(ifp, eaddr); ether_ifattach(ifp, eaddr);
if_printf(ifp, "TSO: %u/%u/%u\n", ifp->if_hw_tsomax, if_printf(ifp, "TSO: %u/%u/%u\n", ifp->if_hw_tsomax,
@ -601,21 +635,9 @@ netvsc_attach(device_t dev)
/* Inform the upper layer about the long frame support. */ /* Inform the upper layer about the long frame support. */
ifp->if_hdrlen = sizeof(struct ether_vlan_header); ifp->if_hdrlen = sizeof(struct ether_vlan_header);
hn_set_chim_size(sc, sc->hn_chim_szmax);
if (hn_tx_chimney_size > 0 &&
hn_tx_chimney_size < sc->hn_chim_szmax)
hn_set_chim_size(sc, hn_tx_chimney_size);
ctx = device_get_sysctl_ctx(dev);
child = SYSCTL_CHILDREN(device_get_sysctl_tree(dev));
SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "nvs_version", CTLFLAG_RD,
&sc->hn_nvs_ver, 0, "NVS version");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "ndis_version",
CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
hn_ndis_version_sysctl, "A", "NDIS version");
return (0); return (0);
failed: failed:
/* TODO: reuse netvsc_detach() */
hn_destroy_tx_data(sc); hn_destroy_tx_data(sc);
if (ifp != NULL) if (ifp != NULL)
if_free(ifp); if_free(ifp);