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Date:      Fri, 14 Oct 2016 03:32:20 +0000 (UTC)
From:      Sepherosa Ziehau <sephe@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org
Subject:   svn commit: r307256 - stable/10/sys/dev/hyperv/netvsc
Message-ID:  <201610140332.u9E3WKIT076789@repo.freebsd.org>
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Author: sephe
Date: Fri Oct 14 03:32:20 2016
New Revision: 307256
URL: https://svnweb.freebsd.org/changeset/base/307256

Log:
  MFC 306433
  
      hyperv/hn: Don't set HASHVAL pktinfo for NDIS < 6.30
  
      This unbreaks packet sending on WS2008R2.
  
      Sponsored by:   Microsoft
      Differential Revision:  https://reviews.freebsd.org/D8057

Modified:
  stable/10/sys/dev/hyperv/netvsc/hv_net_vsc.h
  stable/10/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
Directory Properties:
  stable/10/   (props changed)

Modified: stable/10/sys/dev/hyperv/netvsc/hv_net_vsc.h
==============================================================================
--- stable/10/sys/dev/hyperv/netvsc/hv_net_vsc.h	Fri Oct 14 03:26:24 2016	(r307255)
+++ stable/10/sys/dev/hyperv/netvsc/hv_net_vsc.h	Fri Oct 14 03:32:20 2016	(r307256)
@@ -168,6 +168,7 @@ struct hn_tx_ring {
 	struct buf_ring	*hn_mbuf_br;
 	int		hn_oactive;
 	int		hn_tx_idx;
+	int		hn_tx_flags;
 
 	struct mtx	hn_tx_lock;
 	struct hn_softc	*hn_sc;
@@ -194,10 +195,10 @@ struct hn_tx_ring {
 	struct hn_txdesc *hn_txdesc;
 	bus_dma_tag_t	hn_tx_rndis_dtag;
 	struct sysctl_oid *hn_tx_sysctl_tree;
-	int		hn_tx_flags;
 } __aligned(CACHE_LINE_SIZE);
 
 #define HN_TX_FLAG_ATTACHED	0x1
+#define HN_TX_FLAG_HASHVAL	0x2	/* support HASHVAL pktinfo */
 
 /*
  * Device-specific softc structure

Modified: stable/10/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
==============================================================================
--- stable/10/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c	Fri Oct 14 03:26:24 2016	(r307255)
+++ stable/10/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c	Fri Oct 14 03:32:20 2016	(r307256)
@@ -1028,14 +1028,16 @@ hn_encap(struct hn_tx_ring *txr, struct 
 	pkt->rm_pktinfooffset = sizeof(*pkt);
 	pkt->rm_pktinfolen = 0;
 
-	/*
-	 * Set the hash value for this packet, so that the host could
-	 * dispatch the TX done event for this packet back to this TX
-	 * ring's channel.
-	 */
-	pi_data = hn_rndis_pktinfo_append(pkt, HN_RNDIS_PKT_LEN,
-	    HN_NDIS_HASH_VALUE_SIZE, HN_NDIS_PKTINFO_TYPE_HASHVAL);
-	*pi_data = txr->hn_tx_idx;
+	if (txr->hn_tx_flags & HN_TX_FLAG_HASHVAL) {
+		/*
+		 * Set the hash value for this packet, so that the host could
+		 * dispatch the TX done event for this packet back to this TX
+		 * ring's channel.
+		 */
+		pi_data = hn_rndis_pktinfo_append(pkt, HN_RNDIS_PKT_LEN,
+		    HN_NDIS_HASH_VALUE_SIZE, HN_NDIS_PKTINFO_TYPE_HASHVAL);
+		*pi_data = txr->hn_tx_idx;
+	}
 
 	if (m_head->m_flags & M_VLANTAG) {
 		pi_data = hn_rndis_pktinfo_append(pkt, HN_RNDIS_PKT_LEN,
@@ -2940,6 +2942,12 @@ hn_fixup_tx_data(struct hn_softc *sc)
 
 	for (i = 0; i < sc->hn_tx_ring_cnt; ++i)
 		sc->hn_tx_ring[i].hn_csum_assist = csum_assist;
+
+	if (sc->hn_ndis_ver >= HN_NDIS_VERSION_6_30) {
+		/* Support HASHVAL pktinfo on TX path. */
+		for (i = 0; i < sc->hn_tx_ring_cnt; ++i)
+			sc->hn_tx_ring[i].hn_tx_flags |= HN_TX_FLAG_HASHVAL;
+	}
 }
 
 static void

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