5 files changed, 380 insertions, 152 deletions

diff --git a/drivers/net/hyperv/Kconfig b/drivers/net/hyperv/Kconfig
index 936968d23559..0765d5f61714 100644
--- a/drivers/net/hyperv/Kconfig
+++ b/drivers/net/hyperv/Kconfig
@@ -1,5 +1,6 @@
 config HYPERV_NET
 	tristate "Microsoft Hyper-V virtual network driver"
 	depends on HYPERV
+	select UCS2_STRING
 	help
 	  Select this option to enable the Hyper-V virtual network driver.
diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h
index 960f06141472..4b6e308199d2 100644
--- a/drivers/net/hyperv/hyperv_net.h
+++ b/drivers/net/hyperv/hyperv_net.h
@@ -110,7 +110,7 @@ struct ndis_recv_scale_param { /* NDIS_RECEIVE_SCALE_PARAMETERS */
 	u16 hashkey_size;
 
 	/* The offset of the secret key from the beginning of this structure */
-	u32 kashkey_offset;
+	u32 hashkey_offset;
 
 	u32 processor_masks_offset;
 	u32 num_processor_masks;
@@ -189,7 +189,6 @@ struct netvsc_device;
 struct net_device_context;
 
 extern u32 netvsc_ring_bytes;
-extern struct reciprocal_value netvsc_ring_reciprocal;
 
 struct netvsc_device *netvsc_device_add(struct hv_device *device,
 					const struct netvsc_device_info *info);
@@ -211,7 +210,7 @@ int netvsc_recv_callback(struct net_device *net,
 void netvsc_channel_cb(void *context);
 int netvsc_poll(struct napi_struct *napi, int budget);
 
-void rndis_set_subchannel(struct work_struct *w);
+int rndis_set_subchannel(struct net_device *ndev, struct netvsc_device *nvdev);
 int rndis_filter_open(struct netvsc_device *nvdev);
 int rndis_filter_close(struct netvsc_device *nvdev);
 struct netvsc_device *rndis_filter_device_add(struct hv_device *dev,
@@ -237,6 +236,8 @@ void netvsc_switch_datapath(struct net_device *nv_dev, bool vf);
 #define NVSP_PROTOCOL_VERSION_2		0x30002
 #define NVSP_PROTOCOL_VERSION_4		0x40000
 #define NVSP_PROTOCOL_VERSION_5		0x50000
+#define NVSP_PROTOCOL_VERSION_6		0x60000
+#define NVSP_PROTOCOL_VERSION_61	0x60001
 
 enum {
 	NVSP_MSG_TYPE_NONE = 0,
@@ -308,6 +309,12 @@ enum {
 	NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE,
 
 	NVSP_MSG5_MAX = NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE,
+
+	/* Version 6 messages */
+	NVSP_MSG6_TYPE_PD_API,
+	NVSP_MSG6_TYPE_PD_POST_BATCH,
+
+	NVSP_MSG6_MAX = NVSP_MSG6_TYPE_PD_POST_BATCH
 };
 
 enum {
@@ -619,12 +626,168 @@ union nvsp_5_message_uber {
 	struct nvsp_5_send_indirect_table send_table;
 } __packed;
 
+enum nvsp_6_pd_api_op {
+	PD_API_OP_CONFIG = 1,
+	PD_API_OP_SW_DATAPATH, /* Switch Datapath */
+	PD_API_OP_OPEN_PROVIDER,
+	PD_API_OP_CLOSE_PROVIDER,
+	PD_API_OP_CREATE_QUEUE,
+	PD_API_OP_FLUSH_QUEUE,
+	PD_API_OP_FREE_QUEUE,
+	PD_API_OP_ALLOC_COM_BUF, /* Allocate Common Buffer */
+	PD_API_OP_FREE_COM_BUF, /* Free Common Buffer */
+	PD_API_OP_MAX
+};
+
+struct grp_affinity {
+	u64 mask;
+	u16 grp;
+	u16 reserved[3];
+} __packed;
+
+struct nvsp_6_pd_api_req {
+	u32 op;
+
+	union {
+		/* MMIO information is sent from the VM to VSP */
+		struct __packed {
+			u64 mmio_pa; /* MMIO Physical Address */
+			u32 mmio_len;
+
+			/* Number of PD queues a VM can support */
+			u16 num_subchn;
+		} config;
+
+		/* Switch Datapath */
+		struct __packed {
+			/* Host Datapath Is PacketDirect */
+			u8 host_dpath_is_pd;
+
+			/* Guest PacketDirect Is Enabled */
+			u8 guest_pd_enabled;
+		} sw_dpath;
+
+		/* Open Provider*/
+		struct __packed {
+			u32 prov_id; /* Provider id */
+			u32 flag;
+		} open_prov;
+
+		/* Close Provider */
+		struct __packed {
+			u32 prov_id;
+		} cls_prov;
+
+		/* Create Queue*/
+		struct __packed {
+			u32 prov_id;
+			u16 q_id;
+			u16 q_size;
+			u8 is_recv_q;
+			u8 is_rss_q;
+			u32 recv_data_len;
+			struct grp_affinity affy;
+		} cr_q;
+
+		/* Delete Queue*/
+		struct __packed {
+			u32 prov_id;
+			u16 q_id;
+		} del_q;
+
+		/* Flush Queue */
+		struct __packed {
+			u32 prov_id;
+			u16 q_id;
+		} flush_q;
+
+		/* Allocate Common Buffer */
+		struct __packed {
+			u32 len;
+			u32 pf_node; /* Preferred Node */
+			u16 region_id;
+		} alloc_com_buf;
+
+		/* Free Common Buffer */
+		struct __packed {
+			u32 len;
+			u64 pa; /* Physical Address */
+			u32 pf_node; /* Preferred Node */
+			u16 region_id;
+			u8 cache_type;
+		} free_com_buf;
+	} __packed;
+} __packed;
+
+struct nvsp_6_pd_api_comp {
+	u32 op;
+	u32 status;
+
+	union {
+		struct __packed {
+			/* actual number of PD queues allocated to the VM */
+			u16 num_pd_q;
+
+			/* Num Receive Rss PD Queues */
+			u8 num_rss_q;
+
+			u8 is_supported; /* Is supported by VSP */
+			u8 is_enabled; /* Is enabled by VSP */
+		} config;
+
+		/* Open Provider */
+		struct __packed {
+			u32 prov_id;
+		} open_prov;
+
+		/* Create Queue */
+		struct __packed {
+			u32 prov_id;
+			u16 q_id;
+			u16 q_size;
+			u32 recv_data_len;
+			struct grp_affinity affy;
+		} cr_q;
+
+		/* Allocate Common Buffer */
+		struct __packed {
+			u64 pa; /* Physical Address */
+			u32 len;
+			u32 pf_node; /* Preferred Node */
+			u16 region_id;
+			u8 cache_type;
+		} alloc_com_buf;
+	} __packed;
+} __packed;
+
+struct nvsp_6_pd_buf {
+	u32 region_offset;
+	u16 region_id;
+	u16 is_partial:1;
+	u16 reserved:15;
+} __packed;
+
+struct nvsp_6_pd_batch_msg {
+	struct nvsp_message_header hdr;
+	u16 count;
+	u16 guest2host:1;
+	u16 is_recv:1;
+	u16 reserved:14;
+	struct nvsp_6_pd_buf pd_buf[0];
+} __packed;
+
+union nvsp_6_message_uber {
+	struct nvsp_6_pd_api_req pd_req;
+	struct nvsp_6_pd_api_comp pd_comp;
+} __packed;
+
 union nvsp_all_messages {
 	union nvsp_message_init_uber init_msg;
 	union nvsp_1_message_uber v1_msg;
 	union nvsp_2_message_uber v2_msg;
 	union nvsp_4_message_uber v4_msg;
 	union nvsp_5_message_uber v5_msg;
+	union nvsp_6_message_uber v6_msg;
 } __packed;
 
 /* ALL Messages */
@@ -738,6 +901,8 @@ struct net_device_context {
 	struct hv_device *device_ctx;
 	/* netvsc_device */
 	struct netvsc_device __rcu *nvdev;
+	/* list of netvsc net_devices */
+	struct list_head list;
 	/* reconfigure work */
 	struct delayed_work dwork;
 	/* last reconfig time */
@@ -1112,17 +1277,17 @@ struct ndis_lsov2_offload {
 
 struct ndis_ipsecv2_offload {
 	u32	encap;
-	u16	ip6;
-	u16	ip4opt;
-	u16	ip6ext;
-	u16	ah;
-	u16	esp;
-	u16	ah_esp;
-	u16	xport;
-	u16	tun;
-	u16	xport_tun;
-	u16	lso;
-	u16	extseq;
+	u8	ip6;
+	u8	ip4opt;
+	u8	ip6ext;
+	u8	ah;
+	u8	esp;
+	u8	ah_esp;
+	u8	xport;
+	u8	tun;
+	u8	xport_tun;
+	u8	lso;
+	u8	extseq;
 	u32	udp_esp;
 	u32	auth;
 	u32	crypto;
@@ -1130,8 +1295,8 @@ struct ndis_ipsecv2_offload {
 };
 
 struct ndis_rsc_offload {
-	u16	ip4;
-	u16	ip6;
+	u8	ip4;
+	u8	ip6;
 };
 
 struct ndis_encap_offload {
diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c
index 04f611e6f678..31c3d77b4733 100644
--- a/drivers/net/hyperv/netvsc.c
+++ b/drivers/net/hyperv/netvsc.c
@@ -31,7 +31,6 @@
 #include <linux/vmalloc.h>
 #include <linux/rtnetlink.h>
 #include <linux/prefetch.h>
-#include <linux/reciprocal_div.h>
 
 #include <asm/sync_bitops.h>
 
@@ -66,6 +65,41 @@ void netvsc_switch_datapath(struct net_device *ndev, bool vf)
 			       VM_PKT_DATA_INBAND, 0);
 }
 
+/* Worker to setup sub channels on initial setup
+ * Initial hotplug event occurs in softirq context
+ * and can't wait for channels.
+ */
+static void netvsc_subchan_work(struct work_struct *w)
+{
+	struct netvsc_device *nvdev =
+		container_of(w, struct netvsc_device, subchan_work);
+	struct rndis_device *rdev;
+	int i, ret;
+
+	/* Avoid deadlock with device removal already under RTNL */
+	if (!rtnl_trylock()) {
+		schedule_work(w);
+		return;
+	}
+
+	rdev = nvdev->extension;
+	if (rdev) {
+		ret = rndis_set_subchannel(rdev->ndev, nvdev);
+		if (ret == 0) {
+			netif_device_attach(rdev->ndev);
+		} else {
+			/* fallback to only primary channel */
+			for (i = 1; i < nvdev->num_chn; i++)
+				netif_napi_del(&nvdev->chan_table[i].napi);
+
+			nvdev->max_chn = 1;
+			nvdev->num_chn = 1;
+		}
+	}
+
+	rtnl_unlock();
+}
+
 static struct netvsc_device *alloc_net_device(void)
 {
 	struct netvsc_device *net_device;
@@ -82,7 +116,7 @@ static struct netvsc_device *alloc_net_device(void)
 
 	init_completion(&net_device->channel_init_wait);
 	init_waitqueue_head(&net_device->subchan_open);
-	INIT_WORK(&net_device->subchan_work, rndis_set_subchannel);
+	INIT_WORK(&net_device->subchan_work, netvsc_subchan_work);
 
 	return net_device;
 }
@@ -525,7 +559,8 @@ static int netvsc_connect_vsp(struct hv_device *device,
 	struct net_device *ndev = hv_get_drvdata(device);
 	static const u32 ver_list[] = {
 		NVSP_PROTOCOL_VERSION_1, NVSP_PROTOCOL_VERSION_2,
-		NVSP_PROTOCOL_VERSION_4, NVSP_PROTOCOL_VERSION_5
+		NVSP_PROTOCOL_VERSION_4, NVSP_PROTOCOL_VERSION_5,
+		NVSP_PROTOCOL_VERSION_6, NVSP_PROTOCOL_VERSION_61
 	};
 	struct nvsp_message *init_packet;
 	int ndis_version, i, ret;
@@ -634,33 +669,20 @@ void netvsc_device_remove(struct hv_device *device)
 #define RING_AVAIL_PERCENT_HIWATER 20
 #define RING_AVAIL_PERCENT_LOWATER 10
 
-/*
- * Get the percentage of available bytes to write in the ring.
- * The return value is in range from 0 to 100.
- */
-static u32 hv_ringbuf_avail_percent(const struct hv_ring_buffer_info *ring_info)
-{
-	u32 avail_write = hv_get_bytes_to_write(ring_info);
-
-	return reciprocal_divide(avail_write  * 100, netvsc_ring_reciprocal);
-}
-
 static inline void netvsc_free_send_slot(struct netvsc_device *net_device,
 					 u32 index)
 {
 	sync_change_bit(index, net_device->send_section_map);
 }
 
-static void netvsc_send_tx_complete(struct netvsc_device *net_device,
-				    struct vmbus_channel *incoming_channel,
-				    struct hv_device *device,
+static void netvsc_send_tx_complete(struct net_device *ndev,
+				    struct netvsc_device *net_device,
+				    struct vmbus_channel *channel,
 				    const struct vmpacket_descriptor *desc,
 				    int budget)
 {
 	struct sk_buff *skb = (struct sk_buff *)(unsigned long)desc->trans_id;
-	struct net_device *ndev = hv_get_drvdata(device);
 	struct net_device_context *ndev_ctx = netdev_priv(ndev);
-	struct vmbus_channel *channel = device->channel;
 	u16 q_idx = 0;
 	int queue_sends;
 
@@ -674,7 +696,6 @@ static void netvsc_send_tx_complete(struct netvsc_device *net_device,
 		if (send_index != NETVSC_INVALID_INDEX)
 			netvsc_free_send_slot(net_device, send_index);
 		q_idx = packet->q_idx;
-		channel = incoming_channel;
 
 		tx_stats = &net_device->chan_table[q_idx].tx_stats;
 
@@ -696,22 +717,21 @@ static void netvsc_send_tx_complete(struct netvsc_device *net_device,
 		struct netdev_queue *txq = netdev_get_tx_queue(ndev, q_idx);
 
 		if (netif_tx_queue_stopped(txq) &&
-		    (hv_ringbuf_avail_percent(&channel->outbound) > RING_AVAIL_PERCENT_HIWATER ||
-		     queue_sends < 1)) {
+		    (hv_get_avail_to_write_percent(&channel->outbound) >
+		     RING_AVAIL_PERCENT_HIWATER || queue_sends < 1)) {
 			netif_tx_wake_queue(txq);
 			ndev_ctx->eth_stats.wake_queue++;
 		}
 	}
 }
 
-static void netvsc_send_completion(struct netvsc_device *net_device,
+static void netvsc_send_completion(struct net_device *ndev,
+				   struct netvsc_device *net_device,
 				   struct vmbus_channel *incoming_channel,
-				   struct hv_device *device,
 				   const struct vmpacket_descriptor *desc,
 				   int budget)
 {
-	struct nvsp_message *nvsp_packet = hv_pkt_data(desc);
-	struct net_device *ndev = hv_get_drvdata(device);
+	const struct nvsp_message *nvsp_packet = hv_pkt_data(desc);
 
 	switch (nvsp_packet->hdr.msg_type) {
 	case NVSP_MSG_TYPE_INIT_COMPLETE:
@@ -725,8 +745,8 @@ static void netvsc_send_completion(struct netvsc_device *net_device,
 		break;
 
 	case NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE:
-		netvsc_send_tx_complete(net_device, incoming_channel,
-					device, desc, budget);
+		netvsc_send_tx_complete(ndev, net_device, incoming_channel,
+					desc, budget);
 		break;
 
 	default:
@@ -805,7 +825,7 @@ static inline int netvsc_send_pkt(
 	struct netdev_queue *txq = netdev_get_tx_queue(ndev, packet->q_idx);
 	u64 req_id;
 	int ret;
-	u32 ring_avail = hv_ringbuf_avail_percent(&out_channel->outbound);
+	u32 ring_avail = hv_get_avail_to_write_percent(&out_channel->outbound);
 
 	nvmsg.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT;
 	if (skb)
@@ -1091,12 +1111,11 @@ static void enq_receive_complete(struct net_device *ndev,
 
 static int netvsc_receive(struct net_device *ndev,
 			  struct netvsc_device *net_device,
-			  struct net_device_context *net_device_ctx,
-			  struct hv_device *device,
 			  struct vmbus_channel *channel,
 			  const struct vmpacket_descriptor *desc,
-			  struct nvsp_message *nvsp)
+			  const struct nvsp_message *nvsp)
 {
+	struct net_device_context *net_device_ctx = netdev_priv(ndev);
 	const struct vmtransfer_page_packet_header *vmxferpage_packet
 		= container_of(desc, const struct vmtransfer_page_packet_header, d);
 	u16 q_idx = channel->offermsg.offer.sub_channel_index;
@@ -1157,13 +1176,12 @@ static int netvsc_receive(struct net_device *ndev,
 	return count;
 }
 
-static void netvsc_send_table(struct hv_device *hdev,
-			      struct nvsp_message *nvmsg)
+static void netvsc_send_table(struct net_device *ndev,
+			      const struct nvsp_message *nvmsg)
 {
-	struct net_device *ndev = hv_get_drvdata(hdev);
 	struct net_device_context *net_device_ctx = netdev_priv(ndev);
-	int i;
 	u32 count, *tab;
+	int i;
 
 	count = nvmsg->msg.v5_msg.send_table.count;
 	if (count != VRSS_SEND_TAB_SIZE) {
@@ -1178,24 +1196,25 @@ static void netvsc_send_table(struct hv_device *hdev,
 		net_device_ctx->tx_table[i] = tab[i];
 }
 
-static void netvsc_send_vf(struct net_device_context *net_device_ctx,
-			   struct nvsp_message *nvmsg)
+static void netvsc_send_vf(struct net_device *ndev,
+			   const struct nvsp_message *nvmsg)
 {
+	struct net_device_context *net_device_ctx = netdev_priv(ndev);
+
 	net_device_ctx->vf_alloc = nvmsg->msg.v4_msg.vf_assoc.allocated;
 	net_device_ctx->vf_serial = nvmsg->msg.v4_msg.vf_assoc.serial;
 }
 
-static inline void netvsc_receive_inband(struct hv_device *hdev,
-				 struct net_device_context *net_device_ctx,
-				 struct nvsp_message *nvmsg)
+static  void netvsc_receive_inband(struct net_device *ndev,
+				   const struct nvsp_message *nvmsg)
 {
 	switch (nvmsg->hdr.msg_type) {
 	case NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE:
-		netvsc_send_table(hdev, nvmsg);
+		netvsc_send_table(ndev, nvmsg);
 		break;
 
 	case NVSP_MSG4_TYPE_SEND_VF_ASSOCIATION:
-		netvsc_send_vf(net_device_ctx, nvmsg);
+		netvsc_send_vf(ndev, nvmsg);
 		break;
 	}
 }
@@ -1207,24 +1226,23 @@ static int netvsc_process_raw_pkt(struct hv_device *device,
 				  const struct vmpacket_descriptor *desc,
 				  int budget)
 {
-	struct net_device_context *net_device_ctx = netdev_priv(ndev);
-	struct nvsp_message *nvmsg = hv_pkt_data(desc);
+	const struct nvsp_message *nvmsg = hv_pkt_data(desc);
 
 	trace_nvsp_recv(ndev, channel, nvmsg);
 
 	switch (desc->type) {
 	case VM_PKT_COMP:
-		netvsc_send_completion(net_device, channel, device,
+		netvsc_send_completion(ndev, net_device, channel,
 				       desc, budget);
 		break;
 
 	case VM_PKT_DATA_USING_XFER_PAGES:
-		return netvsc_receive(ndev, net_device, net_device_ctx,
-				      device, channel, desc, nvmsg);
+		return netvsc_receive(ndev, net_device, channel,
+				      desc, nvmsg);
 		break;
 
 	case VM_PKT_DATA_INBAND:
-		netvsc_receive_inband(device, net_device_ctx, nvmsg);
+		netvsc_receive_inband(ndev, nvmsg);
 		break;
 
 	default:
@@ -1256,6 +1274,7 @@ int netvsc_poll(struct napi_struct *napi, int budget)
 	struct hv_device *device = netvsc_channel_to_device(channel);
 	struct net_device *ndev = hv_get_drvdata(device);
 	int work_done = 0;
+	int ret;
 
 	/* If starting a new interval */
 	if (!nvchan->desc)
@@ -1267,16 +1286,18 @@ int netvsc_poll(struct napi_struct *napi, int budget)
 		nvchan->desc = hv_pkt_iter_next(channel, nvchan->desc);
 	}
 
-	/* If send of pending receive completions suceeded
-	 *   and did not exhaust NAPI budget this time
-	 *   and not doing busy poll
+	/* Send any pending receive completions */
+	ret = send_recv_completions(ndev, net_device, nvchan);
+
+	/* If it did not exhaust NAPI budget this time
+	 *  and not doing busy poll
 	 * then re-enable host interrupts
-	 *     and reschedule if ring is not empty.
+	 *  and reschedule if ring is not empty
+	 *   or sending receive completion failed.
 	 */
-	if (send_recv_completions(ndev, net_device, nvchan) == 0 &&
-	    work_done < budget &&
+	if (work_done < budget &&
 	    napi_complete_done(napi, work_done) &&
-	    hv_end_read(&channel->inbound) &&
+	    (ret || hv_end_read(&channel->inbound)) &&
 	    napi_schedule_prep(napi)) {
 		hv_begin_read(&channel->inbound);
 		__napi_schedule(napi);
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index da07ccdf84bf..dd1d6e115145 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -35,7 +35,6 @@
 #include <linux/slab.h>
 #include <linux/rtnetlink.h>
 #include <linux/netpoll.h>
-#include <linux/reciprocal_div.h>
 
 #include <net/arp.h>
 #include <net/route.h>
@@ -58,7 +57,6 @@ static unsigned int ring_size __ro_after_init = 128;
 module_param(ring_size, uint, 0444);
 MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)");
 unsigned int netvsc_ring_bytes __ro_after_init;
-struct reciprocal_value netvsc_ring_reciprocal __ro_after_init;
 
 static const u32 default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
 				NETIF_MSG_LINK | NETIF_MSG_IFUP |
@@ -69,6 +67,8 @@ static int debug = -1;
 module_param(debug, int, 0444);
 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 
+static LIST_HEAD(netvsc_dev_list);
+
 static void netvsc_change_rx_flags(struct net_device *net, int change)
 {
 	struct net_device_context *ndev_ctx = netdev_priv(net);
@@ -126,8 +126,10 @@ static int netvsc_open(struct net_device *net)
 	}
 
 	rdev = nvdev->extension;
-	if (!rdev->link_state)
+	if (!rdev->link_state) {
 		netif_carrier_on(net);
+		netif_tx_wake_all_queues(net);
+	}
 
 	if (vf_netdev) {
 		/* Setting synthetic device up transparently sets
@@ -903,8 +905,20 @@ static int netvsc_attach(struct net_device *ndev,
 	if (IS_ERR(nvdev))
 		return PTR_ERR(nvdev);
 
-	/* Note: enable and attach happen when sub-channels setup */
+	if (nvdev->num_chn > 1) {
+		ret = rndis_set_subchannel(ndev, nvdev);
 
+		/* if unavailable, just proceed with one queue */
+		if (ret) {
+			nvdev->max_chn = 1;
+			nvdev->num_chn = 1;
+		}
+	}
+
+	/* In any case device is now ready */
+	netif_device_attach(ndev);
+
+	/* Note: enable and attach happen when sub-channels setup */
 	netif_carrier_off(ndev);
 
 	if (netif_running(ndev)) {
@@ -1618,8 +1632,24 @@ static int netvsc_set_ringparam(struct net_device *ndev,
 	return ret;
 }
 
+static u32 netvsc_get_msglevel(struct net_device *ndev)
+{
+	struct net_device_context *ndev_ctx = netdev_priv(ndev);
+
+	return ndev_ctx->msg_enable;
+}
+
+static void netvsc_set_msglevel(struct net_device *ndev, u32 val)
+{
+	struct net_device_context *ndev_ctx = netdev_priv(ndev);
+
+	ndev_ctx->msg_enable = val;
+}
+
 static const struct ethtool_ops ethtool_ops = {
 	.get_drvinfo	= netvsc_get_drvinfo,
+	.get_msglevel	= netvsc_get_msglevel,
+	.set_msglevel	= netvsc_set_msglevel,
 	.get_link	= ethtool_op_get_link,
 	.get_ethtool_stats = netvsc_get_ethtool_stats,
 	.get_sset_count = netvsc_get_sset_count,
@@ -1765,13 +1795,10 @@ out_unlock:
 
 static struct net_device *get_netvsc_bymac(const u8 *mac)
 {
-	struct net_device *dev;
-
-	ASSERT_RTNL();
+	struct net_device_context *ndev_ctx;
 
-	for_each_netdev(&init_net, dev) {
-		if (dev->netdev_ops != &device_ops)
-			continue;	/* not a netvsc device */
+	list_for_each_entry(ndev_ctx, &netvsc_dev_list, list) {
+		struct net_device *dev = hv_get_drvdata(ndev_ctx->device_ctx);
 
 		if (ether_addr_equal(mac, dev->perm_addr))
 			return dev;
@@ -1782,25 +1809,18 @@ static struct net_device *get_netvsc_bymac(const u8 *mac)
 
 static struct net_device *get_netvsc_byref(struct net_device *vf_netdev)
 {
+	struct net_device_context *net_device_ctx;
 	struct net_device *dev;
 
-	ASSERT_RTNL();
-
-	for_each_netdev(&init_net, dev) {
-		struct net_device_context *net_device_ctx;
-
-		if (dev->netdev_ops != &device_ops)
-			continue;	/* not a netvsc device */
+	dev = netdev_master_upper_dev_get(vf_netdev);
+	if (!dev || dev->netdev_ops != &device_ops)
+		return NULL;	/* not a netvsc device */
 
-		net_device_ctx = netdev_priv(dev);
-		if (!rtnl_dereference(net_device_ctx->nvdev))
-			continue;	/* device is removed */
+	net_device_ctx = netdev_priv(dev);
+	if (!rtnl_dereference(net_device_ctx->nvdev))
+		return NULL;	/* device is removed */
 
-		if (rtnl_dereference(net_device_ctx->vf_netdev) == vf_netdev)
-			return dev;	/* a match */
-	}
-
-	return NULL;
+	return dev;
 }
 
 /* Called when VF is injecting data into network stack.
@@ -1920,6 +1940,7 @@ static int netvsc_register_vf(struct net_device *vf_netdev)
 	struct net_device *ndev;
 	struct net_device_context *net_device_ctx;
 	struct netvsc_device *netvsc_dev;
+	int ret;
 
 	if (vf_netdev->addr_len != ETH_ALEN)
 		return NOTIFY_DONE;
@@ -1938,11 +1959,29 @@ static int netvsc_register_vf(struct net_device *vf_netdev)
 	if (!netvsc_dev || rtnl_dereference(net_device_ctx->vf_netdev))
 		return NOTIFY_DONE;
 
-	if (netvsc_vf_join(vf_netdev, ndev) != 0)
+	/* if syntihetic interface is a different namespace,
+	 * then move the VF to that namespace; join will be
+	 * done again in that context.
+	 */
+	if (!net_eq(dev_net(ndev), dev_net(vf_netdev))) {
+		ret = dev_change_net_namespace(vf_netdev,
+					       dev_net(ndev), "eth%d");
+		if (ret)
+			netdev_err(vf_netdev,
+				   "could not move to same namespace as %s: %d\n",
+				   ndev->name, ret);
+		else
+			netdev_info(vf_netdev,
+				    "VF moved to namespace with: %s\n",
+				    ndev->name);
 		return NOTIFY_DONE;
+	}
 
 	netdev_info(ndev, "VF registering: %s\n", vf_netdev->name);
 
+	if (netvsc_vf_join(vf_netdev, ndev) != 0)
+		return NOTIFY_DONE;
+
 	dev_hold(vf_netdev);
 	rcu_assign_pointer(net_device_ctx->vf_netdev, vf_netdev);
 	return NOTIFY_OK;
@@ -2062,6 +2101,9 @@ static int netvsc_probe(struct hv_device *dev,
 
 	memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN);
 
+	if (nvdev->num_chn > 1)
+		schedule_work(&nvdev->subchan_work);
+
 	/* hw_features computed in rndis_netdev_set_hwcaps() */
 	net->features = net->hw_features |
 		NETIF_F_HIGHDMA | NETIF_F_SG |
@@ -2077,15 +2119,19 @@ static int netvsc_probe(struct hv_device *dev,
 	else
 		net->max_mtu = ETH_DATA_LEN;
 
-	ret = register_netdev(net);
+	rtnl_lock();
+	ret = register_netdevice(net);
 	if (ret != 0) {
 		pr_err("Unable to register netdev.\n");
 		goto register_failed;
 	}
 
-	return ret;
+	list_add(&net_device_ctx->list, &netvsc_dev_list);
+	rtnl_unlock();
+	return 0;
 
 register_failed:
+	rtnl_unlock();
 	rndis_filter_device_remove(dev, nvdev);
 rndis_failed:
 	free_percpu(net_device_ctx->vf_stats);
@@ -2131,6 +2177,7 @@ static int netvsc_remove(struct hv_device *dev)
 		rndis_filter_device_remove(dev, nvdev);
 
 	unregister_netdevice(net);
+	list_del(&ndev_ctx->list);
 
 	rtnl_unlock();
 	rcu_read_unlock();
@@ -2219,7 +2266,6 @@ static int __init netvsc_drv_init(void)
 			ring_size);
 	}
 	netvsc_ring_bytes = ring_size * PAGE_SIZE;
-	netvsc_ring_reciprocal = reciprocal_value(netvsc_ring_bytes);
 
 	ret = vmbus_driver_register(&netvsc_drv);
 	if (ret)
diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c
index e7ca5b5f39ed..408ece27131c 100644
--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -29,6 +29,7 @@
 #include <linux/nls.h>
 #include <linux/vmalloc.h>
 #include <linux/rtnetlink.h>
+#include <linux/ucs2_string.h>
 
 #include "hyperv_net.h"
 #include "netvsc_trace.h"
@@ -751,7 +752,7 @@ int rndis_filter_set_rss_param(struct rndis_device *rdev,
 	rssp->indirect_tabsize = 4*ITAB_NUM;
 	rssp->indirect_taboffset = sizeof(struct ndis_recv_scale_param);
 	rssp->hashkey_size = NETVSC_HASH_KEYLEN;
-	rssp->kashkey_offset = rssp->indirect_taboffset +
+	rssp->hashkey_offset = rssp->indirect_taboffset +
 			       rssp->indirect_tabsize;
 
 	/* Set indirection table entries */
@@ -760,7 +761,7 @@ int rndis_filter_set_rss_param(struct rndis_device *rdev,
 		itab[i] = rdev->rx_table[i];
 
 	/* Set hask key values */
-	keyp = (u8 *)((unsigned long)rssp + rssp->kashkey_offset);
+	keyp = (u8 *)((unsigned long)rssp + rssp->hashkey_offset);
 	memcpy(keyp, rss_key, NETVSC_HASH_KEYLEN);
 
 	ret = rndis_filter_send_request(rdev, request);
@@ -1061,29 +1062,15 @@ static void netvsc_sc_open(struct vmbus_channel *new_sc)
  * This breaks overlap of processing the host message for the
  * new primary channel with the initialization of sub-channels.
  */
-void rndis_set_subchannel(struct work_struct *w)
+int rndis_set_subchannel(struct net_device *ndev, struct netvsc_device *nvdev)
 {
-	struct netvsc_device *nvdev
-		= container_of(w, struct netvsc_device, subchan_work);
 	struct nvsp_message *init_packet = &nvdev->channel_init_pkt;
-	struct net_device_context *ndev_ctx;
-	struct rndis_device *rdev;
-	struct net_device *ndev;
-	struct hv_device *hv_dev;
+	struct net_device_context *ndev_ctx = netdev_priv(ndev);
+	struct hv_device *hv_dev = ndev_ctx->device_ctx;
+	struct rndis_device *rdev = nvdev->extension;
 	int i, ret;
 
-	if (!rtnl_trylock()) {
-		schedule_work(w);
-		return;
-	}
-
-	rdev = nvdev->extension;
-	if (!rdev)
-		goto unlock;	/* device was removed */
-
-	ndev = rdev->ndev;
-	ndev_ctx = netdev_priv(ndev);
-	hv_dev = ndev_ctx->device_ctx;
+	ASSERT_RTNL();
 
 	memset(init_packet, 0, sizeof(struct nvsp_message));
 	init_packet->hdr.msg_type = NVSP_MSG5_TYPE_SUBCHANNEL;
@@ -1099,13 +1086,13 @@ void rndis_set_subchannel(struct work_struct *w)
 			       VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
 	if (ret) {
 		netdev_err(ndev, "sub channel allocate send failed: %d\n", ret);
-		goto failed;
+		return ret;
 	}
 
 	wait_for_completion(&nvdev->channel_init_wait);
 	if (init_packet->msg.v5_msg.subchn_comp.status != NVSP_STAT_SUCCESS) {
 		netdev_err(ndev, "sub channel request failed\n");
-		goto failed;
+		return -EIO;
 	}
 
 	nvdev->num_chn = 1 +
@@ -1124,21 +1111,7 @@ void rndis_set_subchannel(struct work_struct *w)
 	for (i = 0; i < VRSS_SEND_TAB_SIZE; i++)
 		ndev_ctx->tx_table[i] = i % nvdev->num_chn;
 
-	netif_device_attach(ndev);
-	rtnl_unlock();
-	return;
-
-failed:
-	/* fallback to only primary channel */
-	for (i = 1; i < nvdev->num_chn; i++)
-		netif_napi_del(&nvdev->chan_table[i].napi);
-
-	nvdev->max_chn = 1;
-	nvdev->num_chn = 1;
-
-	netif_device_attach(ndev);
-unlock:
-	rtnl_unlock();
+	return 0;
 }
 
 static int rndis_netdev_set_hwcaps(struct rndis_device *rndis_device,
@@ -1223,6 +1196,32 @@ static int rndis_netdev_set_hwcaps(struct rndis_device *rndis_device,
 	return ret;
 }
 
+static void rndis_get_friendly_name(struct net_device *net,
+				    struct rndis_device *rndis_device,
+				    struct netvsc_device *net_device)
+{
+	ucs2_char_t wname[256];
+	unsigned long len;
+	u8 ifalias[256];
+	u32 size;
+
+	size = sizeof(wname);
+	if (rndis_filter_query_device(rndis_device, net_device,
+				      RNDIS_OID_GEN_FRIENDLY_NAME,
+				      wname, &size) != 0)
+		return;	/* ignore if host does not support */
+
+	if (size == 0)
+		return;	/* name not set */
+
+	/* Convert Windows Unicode string to UTF-8 */
+	len = ucs2_as_utf8(ifalias, wname, sizeof(ifalias));
+
+	/* ignore the default value from host */
+	if (strcmp(ifalias, "Network Adapter") != 0)
+		dev_set_alias(net, ifalias, len);
+}
+
 struct netvsc_device *rndis_filter_device_add(struct hv_device *dev,
 				      struct netvsc_device_info *device_info)
 {
@@ -1276,6 +1275,10 @@ struct netvsc_device *rndis_filter_device_add(struct hv_device *dev,
 
 	memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN);
 
+	/* Get friendly name as ifalias*/
+	if (!net->ifalias)
+		rndis_get_friendly_name(net, rndis_device, net_device);
+
 	/* Query and set hardware capabilities */
 	ret = rndis_netdev_set_hwcaps(rndis_device, net_device);
 	if (ret != 0)
@@ -1329,21 +1332,13 @@ struct netvsc_device *rndis_filter_device_add(struct hv_device *dev,
 		netif_napi_add(net, &net_device->chan_table[i].napi,
 			       netvsc_poll, NAPI_POLL_WEIGHT);
 
-	if (net_device->num_chn > 1)
-		schedule_work(&net_device->subchan_work);
+	return net_device;
 
 out:
-	/* if unavailable, just proceed with one queue */
-	if (ret) {
-		net_device->max_chn = 1;
-		net_device->num_chn = 1;
-	}
-
-	/* No sub channels, device is ready */
-	if (net_device->num_chn == 1)
-		netif_device_attach(net);
-
-	return net_device;
+	/* setting up multiple channels failed */
+	net_device->max_chn = 1;
+	net_device->num_chn = 1;
+	return 0;
 
 err_dev_remv:
 	rndis_filter_device_remove(dev, net_device);