svn commit: r349856 - in head/sys/dev/hyperv: include netvsc vmbus

[Wei Hu]

Author: whu
Date: Tue Jul  9 07:24:18 2019
New Revision: 349856
URL: https://svnweb.freebsd.org/changeset/base/349856

Log:
  hyperv/vmbus: Update VMBus version 4.0 and 5.0 support.
  
  Add VMBus protocol version 4.0. and 5.0 to support Windows 10 and newer HyperV hosts.
  
  For VMBus 4.0 and newer HyperV, the netvsc gpadl teardown must be done after vmbus close.
  
  Submitted by:	whu
  MFC after:	2 weeks
  Sponsored by:	Microsoft

Modified:
  head/sys/dev/hyperv/include/hyperv.h
  head/sys/dev/hyperv/include/vmbus.h
  head/sys/dev/hyperv/netvsc/hn_nvs.c
  head/sys/dev/hyperv/netvsc/if_hn.c
  head/sys/dev/hyperv/vmbus/vmbus.c

Modified: head/sys/dev/hyperv/include/hyperv.h
==============================================================================
--- head/sys/dev/hyperv/include/hyperv.h	Tue Jul  9 07:21:33 2019	(r349855)
+++ head/sys/dev/hyperv/include/hyperv.h	Tue Jul  9 07:24:18 2019	(r349856)
@@ -94,6 +94,11 @@ extern hyperv_tc64_t	hyperv_tc64;
 extern u_int		hyperv_features;	/* CPUID_HV_MSR_ */
 extern u_int		hyperv_ver_major;
 
+/*
+ * Vmbus version after negotiation with host.
+ */
+extern uint32_t		vmbus_current_version;
+
 #endif	/* _KERNEL */
 
 #endif  /* _HYPERV_H_ */

Modified: head/sys/dev/hyperv/include/vmbus.h
==============================================================================
--- head/sys/dev/hyperv/include/vmbus.h	Tue Jul  9 07:21:33 2019	(r349855)
+++ head/sys/dev/hyperv/include/vmbus.h	Tue Jul  9 07:24:18 2019	(r349856)
@@ -40,11 +40,15 @@
  * 1.1   --  Windows 7
  * 2.4   --  Windows 8
  * 3.0   --  Windows 8.1
+ * 4.0   --  Windows 10
+ * 5.0   --  Newer Windows 10
  */
 #define VMBUS_VERSION_WS2008		((0 << 16) | (13))
 #define VMBUS_VERSION_WIN7		((1 << 16) | (1))
 #define VMBUS_VERSION_WIN8		((2 << 16) | (4))
 #define VMBUS_VERSION_WIN8_1		((3 << 16) | (0))
+#define VMBUS_VERSION_WIN10		((4 << 16) | (0))
+#define VMBUS_VERSION_WIN10_V5		((5 << 16) | (0))
 
 #define VMBUS_VERSION_MAJOR(ver)	(((uint32_t)(ver)) >> 16)
 #define VMBUS_VERSION_MINOR(ver)	(((uint32_t)(ver)) & 0xffff)

Modified: head/sys/dev/hyperv/netvsc/hn_nvs.c
==============================================================================
--- head/sys/dev/hyperv/netvsc/hn_nvs.c	Tue Jul  9 07:21:33 2019	(r349855)
+++ head/sys/dev/hyperv/netvsc/hn_nvs.c	Tue Jul  9 07:24:18 2019	(r349856)
@@ -365,7 +365,7 @@ hn_nvs_disconn_rxbuf(struct hn_softc *sc)
 		pause("lingtx", (200 * hz) / 1000);
 	}
 
-	if (sc->hn_rxbuf_gpadl != 0) {
+	if (vmbus_current_version < VMBUS_VERSION_WIN10 && sc->hn_rxbuf_gpadl != 0) {
 		/*
 		 * Disconnect RXBUF from primary channel.
 		 */
@@ -426,7 +426,7 @@ hn_nvs_disconn_chim(struct hn_softc *sc)
 		pause("lingtx", (200 * hz) / 1000);
 	}
 
-	if (sc->hn_chim_gpadl != 0) {
+	if (vmbus_current_version < VMBUS_VERSION_WIN10 && sc->hn_chim_gpadl != 0) {
 		/*
 		 * Disconnect chimney sending buffer from primary channel.
 		 */

Modified: head/sys/dev/hyperv/netvsc/if_hn.c
==============================================================================
--- head/sys/dev/hyperv/netvsc/if_hn.c	Tue Jul  9 07:21:33 2019	(r349855)
+++ head/sys/dev/hyperv/netvsc/if_hn.c	Tue Jul  9 07:24:18 2019	(r349856)
@@ -6630,6 +6630,38 @@ hn_synth_detach(struct hn_softc *sc)
 	/* Detach all of the channels. */
 	hn_detach_allchans(sc);
 
+	if (vmbus_current_version >= VMBUS_VERSION_WIN10 && sc->hn_rxbuf_gpadl != 0) {
+		/*
+		 * Host is post-Win2016, disconnect RXBUF from primary channel here.
+		 */
+		int error;
+
+		error = vmbus_chan_gpadl_disconnect(sc->hn_prichan,
+		    sc->hn_rxbuf_gpadl);
+		if (error) {
+			if_printf(sc->hn_ifp,
+			    "rxbuf gpadl disconn failed: %d\n", error);
+			sc->hn_flags |= HN_FLAG_RXBUF_REF;
+		}
+		sc->hn_rxbuf_gpadl = 0;
+	}
+
+	if (vmbus_current_version >= VMBUS_VERSION_WIN10 && sc->hn_chim_gpadl != 0) {
+		/*
+		 * Host is post-Win2016, disconnect chimney sending buffer from
+		 * primary channel here.
+		 */
+		int error;
+
+		error = vmbus_chan_gpadl_disconnect(sc->hn_prichan,
+		    sc->hn_chim_gpadl);
+		if (error) {
+			if_printf(sc->hn_ifp,
+			    "chim gpadl disconn failed: %d\n", error);
+			sc->hn_flags |= HN_FLAG_CHIM_REF;
+		}
+		sc->hn_chim_gpadl = 0;
+	}
 	sc->hn_flags &= ~HN_FLAG_SYNTH_ATTACHED;
 }
 

Modified: head/sys/dev/hyperv/vmbus/vmbus.c
==============================================================================
--- head/sys/dev/hyperv/vmbus/vmbus.c	Tue Jul  9 07:21:33 2019	(r349855)
+++ head/sys/dev/hyperv/vmbus/vmbus.c	Tue Jul  9 07:24:18 2019	(r349856)
@@ -138,7 +138,10 @@ SYSCTL_INT(_hw_vmbus, OID_AUTO, pin_evttask, CTLFLAG_R
 
 extern inthand_t IDTVEC(vmbus_isr), IDTVEC(vmbus_isr_pti);
 
+uint32_t			vmbus_current_version;
+
 static const uint32_t		vmbus_version[] = {
+	VMBUS_VERSION_WIN10,
 	VMBUS_VERSION_WIN8_1,
 	VMBUS_VERSION_WIN8,
 	VMBUS_VERSION_WIN7,
@@ -412,6 +415,7 @@ vmbus_init(struct vmbus_softc *sc)
 
 		error = vmbus_connect(sc, vmbus_version[i]);
 		if (!error) {
+			vmbus_current_version = vmbus_version[i];
 			sc->vmbus_version = vmbus_version[i];
 			device_printf(sc->vmbus_dev, "version %u.%u\n",
 			    VMBUS_VERSION_MAJOR(sc->vmbus_version),