diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index 5185a16..b4a0170 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -1,25 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  *
  * Copyright (c) 2011, Microsoft Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307 USA.
- *
  * Authors:
  *   Haiyang Zhang <haiyangz@microsoft.com>
  *   Hank Janssen  <hjanssen@microsoft.com>
  *   K. Y. Srinivasan <kys@microsoft.com>
- *
  */
 
 #ifndef _HYPERV_H
@@ -141,6 +128,11 @@
 
 	u32 ring_datasize;		/* < ring_size */
 	u32 priv_read_index;
+	/*
+	 * The ring buffer mutex lock. This lock prevents the ring buffer from
+	 * being freed while the ring buffer is being accessed.
+	 */
+	struct mutex ring_buffer_mutex;
 };
 
 
@@ -222,8 +214,8 @@
  * struct contains the fundamental information about an offer.
  */
 struct vmbus_channel_offer {
-	uuid_le if_type;
-	uuid_le if_instance;
+	guid_t if_type;
+	guid_t if_instance;
 
 	/*
 	 * These two fields are not currently used.
@@ -253,7 +245,10 @@
 		} pipe;
 	} u;
 	/*
-	 * The sub_channel_index is defined in win8.
+	 * The sub_channel_index is defined in Win8: a value of zero means a
+	 * primary channel and a value of non-zero means a sub-channel.
+	 *
+	 * Before Win8, the field is reserved, meaning it's always zero.
 	 */
 	u16 sub_channel_index;
 	u16 reserved3;
@@ -431,6 +426,9 @@
 	CHANNELMSG_COUNT
 };
 
+/* Hyper-V supports about 2048 channels, and the RELIDs start with 1. */
+#define INVALID_RELID	U32_MAX
+
 struct vmbus_channel_message_header {
 	enum vmbus_channel_message_type msgtype;
 	u32 padding;
@@ -614,8 +612,8 @@
 /* Hyper-V socket: guest's connect()-ing to host */
 struct vmbus_channel_tl_connect_request {
 	struct vmbus_channel_message_header header;
-	uuid_le guest_endpoint_id;
-	uuid_le host_service_id;
+	guid_t guest_endpoint_id;
+	guid_t host_service_id;
 } __packed;
 
 struct vmbus_channel_version_response {
@@ -714,7 +712,7 @@
 
 struct vmbus_device {
 	u16  dev_type;
-	uuid_le guid;
+	guid_t guid;
 	bool perf_device;
 };
 
@@ -739,8 +737,9 @@
 	u32 ringbuffer_gpadlhandle;
 
 	/* Allocated memory for ring buffer */
-	void *ringbuffer_pages;
+	struct page *ringbuffer_page;
 	u32 ringbuffer_pagecount;
+	u32 ringbuffer_send_offset;
 	struct hv_ring_buffer_info outbound;	/* send to parent */
 	struct hv_ring_buffer_info inbound;	/* receive from parent */
 
@@ -750,6 +749,19 @@
 	u64	interrupts;	/* Host to Guest interrupts */
 	u64	sig_events;	/* Guest to Host events */
 
+	/*
+	 * Guest to host interrupts caused by the outbound ring buffer changing
+	 * from empty to not empty.
+	 */
+	u64 intr_out_empty;
+
+	/*
+	 * Indicates that a full outbound ring buffer was encountered. The flag
+	 * is set to true when a full outbound ring buffer is encountered and
+	 * set to false when a write to the outbound ring buffer is completed.
+	 */
+	bool out_full_flag;
+
 	/* Channel callback's invoked in softirq context */
 	struct tasklet_struct callback_event;
 	void (*onchannel_callback)(void *context);
@@ -830,15 +842,6 @@
 	 */
 	struct list_head sc_list;
 	/*
-	 * Current number of sub-channels.
-	 */
-	int num_sc;
-	/*
-	 * Number of a sub-channel (position within sc_list) which is supposed
-	 * to be used as the next outgoing channel.
-	 */
-	int next_oc;
-	/*
 	 * The primary channel this sub-channel belongs to.
 	 * This will be NULL for the primary channel.
 	 */
@@ -911,6 +914,24 @@
 	 * vmbus_connection.work_queue and hang: see vmbus_process_offer().
 	 */
 	struct work_struct add_channel_work;
+
+	/*
+	 * Guest to host interrupts caused by the inbound ring buffer changing
+	 * from full to not full while a packet is waiting.
+	 */
+	u64 intr_in_full;
+
+	/*
+	 * The total number of write operations that encountered a full
+	 * outbound ring buffer.
+	 */
+	u64 out_full_total;
+
+	/*
+	 * The number of write operations that were the first to encounter a
+	 * full outbound ring buffer.
+	 */
+	u64 out_full_first;
 };
 
 static inline bool is_hvsock_channel(const struct vmbus_channel *c)
@@ -919,6 +940,11 @@
 		  VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER);
 }
 
+static inline bool is_sub_channel(const struct vmbus_channel *c)
+{
+	return c->offermsg.offer.sub_channel_index != 0;
+}
+
 static inline void set_channel_affinity_state(struct vmbus_channel *c,
 					      enum hv_numa_policy policy)
 {
@@ -944,6 +970,21 @@
 static inline void set_channel_pending_send_size(struct vmbus_channel *c,
 						 u32 size)
 {
+	unsigned long flags;
+
+	if (size) {
+		spin_lock_irqsave(&c->outbound.ring_lock, flags);
+		++c->out_full_total;
+
+		if (!c->out_full_flag) {
+			++c->out_full_first;
+			c->out_full_flag = true;
+		}
+		spin_unlock_irqrestore(&c->outbound.ring_lock, flags);
+	} else {
+		c->out_full_flag = false;
+	}
+
 	c->outbound.ring_buffer->pending_send_sz = size;
 }
 
@@ -972,14 +1013,6 @@
 		void (*chn_rescind_cb)(struct vmbus_channel *));
 
 /*
- * Retrieve the (sub) channel on which to send an outgoing request.
- * When a primary channel has multiple sub-channels, we choose a
- * channel whose VCPU binding is closest to the VCPU on which
- * this call is being made.
- */
-struct vmbus_channel *vmbus_get_outgoing_channel(struct vmbus_channel *primary);
-
-/*
  * Check if sub-channels have already been offerred. This API will be useful
  * when the driver is unloaded after establishing sub-channels. In this case,
  * when the driver is re-loaded, the driver would have to check if the
@@ -1028,6 +1061,14 @@
 	struct hv_mpb_array range;
 } __packed;
 
+int vmbus_alloc_ring(struct vmbus_channel *channel,
+		     u32 send_size, u32 recv_size);
+void vmbus_free_ring(struct vmbus_channel *channel);
+
+int vmbus_connect_ring(struct vmbus_channel *channel,
+		       void (*onchannel_callback)(void *context),
+		       void *context);
+int vmbus_disconnect_ring(struct vmbus_channel *channel);
 
 extern int vmbus_open(struct vmbus_channel *channel,
 			    u32 send_ringbuffersize,
@@ -1104,7 +1145,7 @@
 	bool hvsock;
 
 	/* the device type supported by this driver */
-	uuid_le dev_type;
+	guid_t dev_type;
 	const struct hv_vmbus_device_id *id_table;
 
 	struct device_driver driver;
@@ -1119,19 +1160,23 @@
 	int (*remove)(struct hv_device *);
 	void (*shutdown)(struct hv_device *);
 
+	int (*suspend)(struct hv_device *);
+	int (*resume)(struct hv_device *);
+
 };
 
 /* Base device object */
 struct hv_device {
 	/* the device type id of this device */
-	uuid_le dev_type;
+	guid_t dev_type;
 
 	/* the device instance id of this device */
-	uuid_le dev_instance;
+	guid_t dev_instance;
 	u16 vendor_id;
 	u16 device_id;
 
 	struct device device;
+	char *driver_override; /* Driver name to force a match */
 
 	struct vmbus_channel *channel;
 	struct kset	     *channels_kset;
@@ -1166,8 +1211,9 @@
 	u32 bytes_avail_towrite;
 };
 
-void hv_ringbuffer_get_debuginfo(const struct hv_ring_buffer_info *ring_info,
-			    struct hv_ring_buffer_debug_info *debug_info);
+
+int hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info,
+				struct hv_ring_buffer_debug_info *debug_info);
 
 /* Vmbus interface */
 #define vmbus_driver_register(driver)	\
@@ -1194,102 +1240,102 @@
  * {f8615163-df3e-46c5-913f-f2d2f965ed0e}
  */
 #define HV_NIC_GUID \
-	.guid = UUID_LE(0xf8615163, 0xdf3e, 0x46c5, 0x91, 0x3f, \
-			0xf2, 0xd2, 0xf9, 0x65, 0xed, 0x0e)
+	.guid = GUID_INIT(0xf8615163, 0xdf3e, 0x46c5, 0x91, 0x3f, \
+			  0xf2, 0xd2, 0xf9, 0x65, 0xed, 0x0e)
 
 /*
  * IDE GUID
  * {32412632-86cb-44a2-9b5c-50d1417354f5}
  */
 #define HV_IDE_GUID \
-	.guid = UUID_LE(0x32412632, 0x86cb, 0x44a2, 0x9b, 0x5c, \
-			0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5)
+	.guid = GUID_INIT(0x32412632, 0x86cb, 0x44a2, 0x9b, 0x5c, \
+			  0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5)
 
 /*
  * SCSI GUID
  * {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f}
  */
 #define HV_SCSI_GUID \
-	.guid = UUID_LE(0xba6163d9, 0x04a1, 0x4d29, 0xb6, 0x05, \
-			0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f)
+	.guid = GUID_INIT(0xba6163d9, 0x04a1, 0x4d29, 0xb6, 0x05, \
+			  0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f)
 
 /*
  * Shutdown GUID
  * {0e0b6031-5213-4934-818b-38d90ced39db}
  */
 #define HV_SHUTDOWN_GUID \
-	.guid = UUID_LE(0x0e0b6031, 0x5213, 0x4934, 0x81, 0x8b, \
-			0x38, 0xd9, 0x0c, 0xed, 0x39, 0xdb)
+	.guid = GUID_INIT(0x0e0b6031, 0x5213, 0x4934, 0x81, 0x8b, \
+			  0x38, 0xd9, 0x0c, 0xed, 0x39, 0xdb)
 
 /*
  * Time Synch GUID
  * {9527E630-D0AE-497b-ADCE-E80AB0175CAF}
  */
 #define HV_TS_GUID \
-	.guid = UUID_LE(0x9527e630, 0xd0ae, 0x497b, 0xad, 0xce, \
-			0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf)
+	.guid = GUID_INIT(0x9527e630, 0xd0ae, 0x497b, 0xad, 0xce, \
+			  0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf)
 
 /*
  * Heartbeat GUID
  * {57164f39-9115-4e78-ab55-382f3bd5422d}
  */
 #define HV_HEART_BEAT_GUID \
-	.guid = UUID_LE(0x57164f39, 0x9115, 0x4e78, 0xab, 0x55, \
-			0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d)
+	.guid = GUID_INIT(0x57164f39, 0x9115, 0x4e78, 0xab, 0x55, \
+			  0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d)
 
 /*
  * KVP GUID
  * {a9a0f4e7-5a45-4d96-b827-8a841e8c03e6}
  */
 #define HV_KVP_GUID \
-	.guid = UUID_LE(0xa9a0f4e7, 0x5a45, 0x4d96, 0xb8, 0x27, \
-			0x8a, 0x84, 0x1e, 0x8c, 0x03, 0xe6)
+	.guid = GUID_INIT(0xa9a0f4e7, 0x5a45, 0x4d96, 0xb8, 0x27, \
+			  0x8a, 0x84, 0x1e, 0x8c, 0x03, 0xe6)
 
 /*
  * Dynamic memory GUID
  * {525074dc-8985-46e2-8057-a307dc18a502}
  */
 #define HV_DM_GUID \
-	.guid = UUID_LE(0x525074dc, 0x8985, 0x46e2, 0x80, 0x57, \
-			0xa3, 0x07, 0xdc, 0x18, 0xa5, 0x02)
+	.guid = GUID_INIT(0x525074dc, 0x8985, 0x46e2, 0x80, 0x57, \
+			  0xa3, 0x07, 0xdc, 0x18, 0xa5, 0x02)
 
 /*
  * Mouse GUID
  * {cfa8b69e-5b4a-4cc0-b98b-8ba1a1f3f95a}
  */
 #define HV_MOUSE_GUID \
-	.guid = UUID_LE(0xcfa8b69e, 0x5b4a, 0x4cc0, 0xb9, 0x8b, \
-			0x8b, 0xa1, 0xa1, 0xf3, 0xf9, 0x5a)
+	.guid = GUID_INIT(0xcfa8b69e, 0x5b4a, 0x4cc0, 0xb9, 0x8b, \
+			  0x8b, 0xa1, 0xa1, 0xf3, 0xf9, 0x5a)
 
 /*
  * Keyboard GUID
  * {f912ad6d-2b17-48ea-bd65-f927a61c7684}
  */
 #define HV_KBD_GUID \
-	.guid = UUID_LE(0xf912ad6d, 0x2b17, 0x48ea, 0xbd, 0x65, \
-			0xf9, 0x27, 0xa6, 0x1c, 0x76, 0x84)
+	.guid = GUID_INIT(0xf912ad6d, 0x2b17, 0x48ea, 0xbd, 0x65, \
+			  0xf9, 0x27, 0xa6, 0x1c, 0x76, 0x84)
 
 /*
  * VSS (Backup/Restore) GUID
  */
 #define HV_VSS_GUID \
-	.guid = UUID_LE(0x35fa2e29, 0xea23, 0x4236, 0x96, 0xae, \
-			0x3a, 0x6e, 0xba, 0xcb, 0xa4, 0x40)
+	.guid = GUID_INIT(0x35fa2e29, 0xea23, 0x4236, 0x96, 0xae, \
+			  0x3a, 0x6e, 0xba, 0xcb, 0xa4, 0x40)
 /*
  * Synthetic Video GUID
  * {DA0A7802-E377-4aac-8E77-0558EB1073F8}
  */
 #define HV_SYNTHVID_GUID \
-	.guid = UUID_LE(0xda0a7802, 0xe377, 0x4aac, 0x8e, 0x77, \
-			0x05, 0x58, 0xeb, 0x10, 0x73, 0xf8)
+	.guid = GUID_INIT(0xda0a7802, 0xe377, 0x4aac, 0x8e, 0x77, \
+			  0x05, 0x58, 0xeb, 0x10, 0x73, 0xf8)
 
 /*
  * Synthetic FC GUID
  * {2f9bcc4a-0069-4af3-b76b-6fd0be528cda}
  */
 #define HV_SYNTHFC_GUID \
-	.guid = UUID_LE(0x2f9bcc4a, 0x0069, 0x4af3, 0xb7, 0x6b, \
-			0x6f, 0xd0, 0xbe, 0x52, 0x8c, 0xda)
+	.guid = GUID_INIT(0x2f9bcc4a, 0x0069, 0x4af3, 0xb7, 0x6b, \
+			  0x6f, 0xd0, 0xbe, 0x52, 0x8c, 0xda)
 
 /*
  * Guest File Copy Service
@@ -1297,16 +1343,16 @@
  */
 
 #define HV_FCOPY_GUID \
-	.guid = UUID_LE(0x34d14be3, 0xdee4, 0x41c8, 0x9a, 0xe7, \
-			0x6b, 0x17, 0x49, 0x77, 0xc1, 0x92)
+	.guid = GUID_INIT(0x34d14be3, 0xdee4, 0x41c8, 0x9a, 0xe7, \
+			  0x6b, 0x17, 0x49, 0x77, 0xc1, 0x92)
 
 /*
  * NetworkDirect. This is the guest RDMA service.
  * {8c2eaf3d-32a7-4b09-ab99-bd1f1c86b501}
  */
 #define HV_ND_GUID \
-	.guid = UUID_LE(0x8c2eaf3d, 0x32a7, 0x4b09, 0xab, 0x99, \
-			0xbd, 0x1f, 0x1c, 0x86, 0xb5, 0x01)
+	.guid = GUID_INIT(0x8c2eaf3d, 0x32a7, 0x4b09, 0xab, 0x99, \
+			  0xbd, 0x1f, 0x1c, 0x86, 0xb5, 0x01)
 
 /*
  * PCI Express Pass Through
@@ -1314,8 +1360,8 @@
  */
 
 #define HV_PCIE_GUID \
-	.guid = UUID_LE(0x44c4f61d, 0x4444, 0x4400, 0x9d, 0x52, \
-			0x80, 0x2e, 0x27, 0xed, 0xe1, 0x9f)
+	.guid = GUID_INIT(0x44c4f61d, 0x4444, 0x4400, 0x9d, 0x52, \
+			  0x80, 0x2e, 0x27, 0xed, 0xe1, 0x9f)
 
 /*
  * Linux doesn't support the 3 devices: the first two are for
@@ -1327,16 +1373,16 @@
  */
 
 #define HV_AVMA1_GUID \
-	.guid = UUID_LE(0xf8e65716, 0x3cb3, 0x4a06, 0x9a, 0x60, \
-			0x18, 0x89, 0xc5, 0xcc, 0xca, 0xb5)
+	.guid = GUID_INIT(0xf8e65716, 0x3cb3, 0x4a06, 0x9a, 0x60, \
+			  0x18, 0x89, 0xc5, 0xcc, 0xca, 0xb5)
 
 #define HV_AVMA2_GUID \
-	.guid = UUID_LE(0x3375baf4, 0x9e15, 0x4b30, 0xb7, 0x65, \
-			0x67, 0xac, 0xb1, 0x0d, 0x60, 0x7b)
+	.guid = GUID_INIT(0x3375baf4, 0x9e15, 0x4b30, 0xb7, 0x65, \
+			  0x67, 0xac, 0xb1, 0x0d, 0x60, 0x7b)
 
 #define HV_RDV_GUID \
-	.guid = UUID_LE(0x276aacf4, 0xac15, 0x426c, 0x98, 0xdd, \
-			0x75, 0x21, 0xad, 0x3f, 0x01, 0xfe)
+	.guid = GUID_INIT(0x276aacf4, 0xac15, 0x426c, 0x98, 0xdd, \
+			  0x75, 0x21, 0xad, 0x3f, 0x01, 0xfe)
 
 /*
  * Common header for Hyper-V ICs
@@ -1438,7 +1484,7 @@
 struct hyperv_service_callback {
 	u8 msg_type;
 	char *log_msg;
-	uuid_le data;
+	guid_t data;
 	struct vmbus_channel *channel;
 	void (*callback)(void *context);
 };
@@ -1449,7 +1495,7 @@
 				const int *srv_version, int srv_vercnt,
 				int *nego_fw_version, int *nego_srv_version);
 
-void hv_process_channel_removal(u32 relid);
+void hv_process_channel_removal(struct vmbus_channel *channel);
 
 void vmbus_setevent(struct vmbus_channel *channel);
 /*
@@ -1458,8 +1504,8 @@
 
 extern __u32 vmbus_proto_version;
 
-int vmbus_send_tl_connect_request(const uuid_le *shv_guest_servie_id,
-				  const uuid_le *shv_host_servie_id);
+int vmbus_send_tl_connect_request(const guid_t *shv_guest_servie_id,
+				  const guid_t *shv_host_servie_id);
 void vmbus_set_event(struct vmbus_channel *channel);
 
 /* Get the start of the ring buffer. */
@@ -1546,4 +1592,33 @@
 	for (pkt = hv_pkt_iter_first(channel); pkt; \
 	    pkt = hv_pkt_iter_next(channel, pkt))
 
+/*
+ * Interface for passing data between SR-IOV PF and VF drivers. The VF driver
+ * sends requests to read and write blocks. Each block must be 128 bytes or
+ * smaller. Optionally, the VF driver can register a callback function which
+ * will be invoked when the host says that one or more of the first 64 block
+ * IDs is "invalid" which means that the VF driver should reread them.
+ */
+#define HV_CONFIG_BLOCK_SIZE_MAX 128
+
+int hyperv_read_cfg_blk(struct pci_dev *dev, void *buf, unsigned int buf_len,
+			unsigned int block_id, unsigned int *bytes_returned);
+int hyperv_write_cfg_blk(struct pci_dev *dev, void *buf, unsigned int len,
+			 unsigned int block_id);
+int hyperv_reg_block_invalidate(struct pci_dev *dev, void *context,
+				void (*block_invalidate)(void *context,
+							 u64 block_mask));
+
+struct hyperv_pci_block_ops {
+	int (*read_block)(struct pci_dev *dev, void *buf, unsigned int buf_len,
+			  unsigned int block_id, unsigned int *bytes_returned);
+	int (*write_block)(struct pci_dev *dev, void *buf, unsigned int len,
+			   unsigned int block_id);
+	int (*reg_blk_invalidate)(struct pci_dev *dev, void *context,
+				  void (*block_invalidate)(void *context,
+							   u64 block_mask));
+};
+
+extern struct hyperv_pci_block_ops hvpci_block_ops;
+
 #endif /* _HYPERV_H */