ixv: Reject unsupported E610 Hyper-V VFs

E610 Hyper-V VFs use PCI configuration space communication instead of
the native PF/VF mailbox.  The generic E610 match currently attaches
native mailbox operations to those devices, and the imported Hyper-V
subdevice identifier is incorrect.

Correct the subdevice identifier to 0x00ff, as used by DPDK shared
ixgbe code, and reject that subtype until ixv has a complete Hyper-V
operations table.

Sponsored by:	BBOX.io

(cherry picked from commit 08c41a6)

Author: kev009

sys/dev/ixgbe/if_ixv.c

@@ -78,6 +78,7 @@ static const pci_vendor_info_t ixv_vendor_info_array[] =
  * Function prototypes
  ************************************************************************/
 static void     *ixv_register(device_t);
+static int      ixv_probe(device_t);
 static int      ixv_if_attach_pre(if_ctx_t);
 static int      ixv_if_attach_post(if_ctx_t);
 static int      ixv_if_detach(if_ctx_t);
@@ -147,7 +148,7 @@ static int      ixv_msix_mbx(void *);
 static device_method_t ixv_methods[] = {
 	/* Device interface */
 	DEVMETHOD(device_register, ixv_register),
-	DEVMETHOD(device_probe, iflib_device_probe),
+	DEVMETHOD(device_probe, ixv_probe),
 	DEVMETHOD(device_attach, iflib_device_attach),
 	DEVMETHOD(device_detach, iflib_device_detach),
 	DEVMETHOD(device_shutdown, iflib_device_shutdown),
@@ -234,6 +235,16 @@ ixv_register(device_t dev)
 	return (&ixv_sctx_init);
 }
 
+static int
+ixv_probe(device_t dev)
+{
+	if (pci_get_device(dev) == IXGBE_DEV_ID_E610_VF &&
+	    pci_get_subdevice(dev) == IXGBE_SUBDEV_ID_E610_VF_HV)
+		return (ENXIO);
+
+	return (iflib_device_probe(dev));
+}
+
 /************************************************************************
  * ixv_if_tx_queues_alloc
  ************************************************************************/

sys/dev/ixgbe/ixgbe_type.h

@@ -163,7 +163,7 @@
 #define IXGBE_DEV_ID_X550EM_X_VF		0x15A8
 #define IXGBE_DEV_ID_X550EM_X_VF_HV		0x15A9
 #define IXGBE_DEV_ID_E610_VF			0x57AD
-#define IXGBE_SUBDEV_ID_E610_VF_HV		0x0001
+#define IXGBE_SUBDEV_ID_E610_VF_HV		0x00FF
 
 #define IXGBE_CAT(r, m) IXGBE_##r##m