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hyperv/hn: Workaround erroneous hash type observed on WS2016 for VF.

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The background was described in r324489.

MFC after:	3 days
Sponsored by:	Microsoft
This commit is contained in:
Sepherosa Ziehau 2017-10-11 05:15:49 +00:00
parent 8e4db4e4a1
commit 6f12c42e8b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=324516
3 changed files with 36 additions and 8 deletions
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13
sys/dev/hyperv/netvsc/hn_rndis.c
View File

@ -521,6 +521,10 @@ hn_rndis_query_rsscaps(struct hn_softc *sc, int *rxr_cnt0)
/* Commit! */
sc->hn_rss_ind_size = indsz;
sc->hn_rss_hcap = hash_func | hash_types;
if (sc->hn_caps & HN_CAP_UDPHASH) {
/* UDP 4-tuple hash is unconditionally enabled. */
sc->hn_rss_hcap |= NDIS_HASH_UDP_IPV4_X;
}
*rxr_cnt0 = rxr_cnt;
return (0);
}
@ -760,8 +764,10 @@ hn_rndis_conf_rss(struct hn_softc *sc, uint16_t flags)
("NDIS 6.20+ is required, NDIS version 0x%08x", sc->hn_ndis_ver));
/* XXX only one can be specified through, popcnt? */
KASSERT((sc->hn_rss_hash & NDIS_HASH_FUNCTION_MASK), ("no hash func"));
KASSERT((sc->hn_rss_hash & NDIS_HASH_TYPE_MASK), ("no hash types"));
KASSERT((sc->hn_rss_hash & NDIS_HASH_FUNCTION_MASK),
("no hash func %08x", sc->hn_rss_hash));
KASSERT((sc->hn_rss_hash & NDIS_HASH_STD),
("no standard hash types %08x", sc->hn_rss_hash));
KASSERT(sc->hn_rss_ind_size > 0, ("no indirect table size"));
if (bootverbose) {
@ -780,7 +786,8 @@ hn_rndis_conf_rss(struct hn_softc *sc, uint16_t flags)
prm->ndis_hdr.ndis_rev = NDIS_RSS_PARAMS_REV_2;
prm->ndis_hdr.ndis_size = rss_size;
prm->ndis_flags = flags;
prm->ndis_hash = sc->hn_rss_hash;
prm->ndis_hash = sc->hn_rss_hash &
(NDIS_HASH_FUNCTION_MASK | NDIS_HASH_STD);
prm->ndis_indsize = sizeof(rss->rss_ind[0]) * sc->hn_rss_ind_size;
prm->ndis_indoffset =
__offsetof(struct ndis_rssprm_toeplitz, rss_ind[0]);

20
sys/dev/hyperv/netvsc/if_hn.c
View File

@ -1424,6 +1424,8 @@ hn_rss_type_fromndis(uint32_t rss_hash)
types |= RSS_TYPE_TCP_IPV6;
if (rss_hash & NDIS_HASH_TCP_IPV6_EX)
types |= RSS_TYPE_TCP_IPV6_EX;
if (rss_hash & NDIS_HASH_UDP_IPV4_X)
types |= RSS_TYPE_UDP_IPV4;
return (types);
}
@ -1432,9 +1434,8 @@ hn_rss_type_tondis(uint32_t types)
{
uint32_t rss_hash = 0;
KASSERT((types &
(RSS_TYPE_UDP_IPV4 | RSS_TYPE_UDP_IPV6 | RSS_TYPE_UDP_IPV6_EX)) == 0,
("UDP4, UDP6 and UDP6EX are not supported"));
KASSERT((types & (RSS_TYPE_UDP_IPV6 | RSS_TYPE_UDP_IPV6_EX)) == 0,
("UDP6 and UDP6EX are not supported"));
if (types & RSS_TYPE_IPV4)
rss_hash |= NDIS_HASH_IPV4;
@ -1448,6 +1449,8 @@ hn_rss_type_tondis(uint32_t types)
rss_hash |= NDIS_HASH_TCP_IPV6;
if (types & RSS_TYPE_TCP_IPV6_EX)
rss_hash |= NDIS_HASH_TCP_IPV6_EX;
if (types & RSS_TYPE_UDP_IPV4)
rss_hash |= NDIS_HASH_UDP_IPV4_X;
return (rss_hash);
}
@ -1546,6 +1549,13 @@ hn_vf_rss_fixup(struct hn_softc *sc, bool reconf)
* NOTE:
* We don't disable the hash type, but stop delivery the hash
* value/type through mbufs on RX path.
*
* XXX If HN_CAP_UDPHASH is set in hn_caps, then UDP 4-tuple
* hash is delivered with type of TCP_IPV4. This means if
* UDP_IPV4 is enabled, then TCP_IPV4 should be forced, at
* least to hn_mbuf_hash. However, given that _all_ of the
* NICs implement TCP_IPV4, this will _not_ impose any issues
* here.
*/
if ((my_types & RSS_TYPE_IPV4) &&
(diff_types & ifrh.ifrh_types &
@ -3582,7 +3592,9 @@ hn_rxpkt(struct hn_rx_ring *rxr, const void *data, int dlen,
&l3proto, &l4proto);
}
if (l3proto == ETHERTYPE_IP) {
if (l4proto == IPPROTO_UDP) {
if (l4proto == IPPROTO_UDP &&
(rxr->hn_mbuf_hash &
NDIS_HASH_UDP_IPV4_X)) {
hash_type =
M_HASHTYPE_RSS_UDP_IPV4;
do_lro = 0;

11
sys/dev/hyperv/netvsc/ndis.h
View File

@ -56,8 +56,17 @@
#define NDIS_HASH_IPV6_EX 0x00000800
#define NDIS_HASH_TCP_IPV6 0x00001000
#define NDIS_HASH_TCP_IPV6_EX 0x00002000
#define NDIS_HASH_UDP_IPV4_X 0x00004000 /* XXX non-standard */
#define NDIS_HASH_ALL (NDIS_HASH_IPV4 | \
NDIS_HASH_TCP_IPV4 | \
NDIS_HASH_IPV6 | \
NDIS_HASH_IPV6_EX | \
NDIS_HASH_TCP_IPV6 | \
NDIS_HASH_TCP_IPV6_EX |\
NDIS_HASH_UDP_IPV4_X)
#define NDIS_HASH_STD (NDIS_HASH_IPV4 | \
NDIS_HASH_TCP_IPV4 | \
NDIS_HASH_IPV6 | \
NDIS_HASH_IPV6_EX | \
@ -66,7 +75,7 @@
/* Hash description for use with printf(9) %b identifier. */
#define NDIS_HASH_BITS \
"\20\1TOEPLITZ\11IP4\12TCP4\13IP6\14IP6EX\15TCP6\16TCP6EX"
"\20\1TOEPLITZ\11IP4\12TCP4\13IP6\14IP6EX\15TCP6\16TCP6EX\17UDP4_X"
#define NDIS_HASH_KEYSIZE_TOEPLITZ 40
#define NDIS_HASH_INDCNT 128