Staging: hv: Move the contents of channel_mgmt.h to hyperv.h

Move the contents of channel_mgmt.h to hyperv.h.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Abhishek Kane <v-abkane@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 289 insertions, 0 deletions

diff --git a/drivers/staging/hv/hyperv.h b/drivers/staging/hv/hyperv.h
index 4ca22c60767f..04f1b0f41b1d 100644
--- a/drivers/staging/hv/hyperv.h
+++ b/drivers/staging/hv/hyperv.h
@@ -318,4 +318,293 @@ enum vmbus_packet_type {
 
 #define VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED	1
 
+
+#include <linux/list.h>
+#include <linux/timer.h>
+#include <linux/workqueue.h>
+#include <linux/completion.h>
+#include "hyperv.h"
+
+/* Version 1 messages */
+enum vmbus_channel_message_type {
+	CHANNELMSG_INVALID			=  0,
+	CHANNELMSG_OFFERCHANNEL		=  1,
+	CHANNELMSG_RESCIND_CHANNELOFFER	=  2,
+	CHANNELMSG_REQUESTOFFERS		=  3,
+	CHANNELMSG_ALLOFFERS_DELIVERED	=  4,
+	CHANNELMSG_OPENCHANNEL		=  5,
+	CHANNELMSG_OPENCHANNEL_RESULT		=  6,
+	CHANNELMSG_CLOSECHANNEL		=  7,
+	CHANNELMSG_GPADL_HEADER		=  8,
+	CHANNELMSG_GPADL_BODY			=  9,
+	CHANNELMSG_GPADL_CREATED		= 10,
+	CHANNELMSG_GPADL_TEARDOWN		= 11,
+	CHANNELMSG_GPADL_TORNDOWN		= 12,
+	CHANNELMSG_RELID_RELEASED		= 13,
+	CHANNELMSG_INITIATE_CONTACT		= 14,
+	CHANNELMSG_VERSION_RESPONSE		= 15,
+	CHANNELMSG_UNLOAD			= 16,
+#ifdef VMBUS_FEATURE_PARENT_OR_PEER_MEMORY_MAPPED_INTO_A_CHILD
+	CHANNELMSG_VIEWRANGE_ADD		= 17,
+	CHANNELMSG_VIEWRANGE_REMOVE		= 18,
+#endif
+	CHANNELMSG_COUNT
+};
+
+struct vmbus_channel_message_header {
+	enum vmbus_channel_message_type msgtype;
+	u32 padding;
+} __packed;
+
+/* Query VMBus Version parameters */
+struct vmbus_channel_query_vmbus_version {
+	struct vmbus_channel_message_header header;
+	u32 version;
+} __packed;
+
+/* VMBus Version Supported parameters */
+struct vmbus_channel_version_supported {
+	struct vmbus_channel_message_header header;
+	bool version_supported;
+} __packed;
+
+/* Offer Channel parameters */
+struct vmbus_channel_offer_channel {
+	struct vmbus_channel_message_header header;
+	struct vmbus_channel_offer offer;
+	u32 child_relid;
+	u8 monitorid;
+	bool monitor_allocated;
+} __packed;
+
+/* Rescind Offer parameters */
+struct vmbus_channel_rescind_offer {
+	struct vmbus_channel_message_header header;
+	u32 child_relid;
+} __packed;
+
+/*
+ * Request Offer -- no parameters, SynIC message contains the partition ID
+ * Set Snoop -- no parameters, SynIC message contains the partition ID
+ * Clear Snoop -- no parameters, SynIC message contains the partition ID
+ * All Offers Delivered -- no parameters, SynIC message contains the partition
+ *		           ID
+ * Flush Client -- no parameters, SynIC message contains the partition ID
+ */
+
+/* Open Channel parameters */
+struct vmbus_channel_open_channel {
+	struct vmbus_channel_message_header header;
+
+	/* Identifies the specific VMBus channel that is being opened. */
+	u32 child_relid;
+
+	/* ID making a particular open request at a channel offer unique. */
+	u32 openid;
+
+	/* GPADL for the channel's ring buffer. */
+	u32 ringbuffer_gpadlhandle;
+
+	/* GPADL for the channel's server context save area. */
+	u32 server_contextarea_gpadlhandle;
+
+	/*
+	* The upstream ring buffer begins at offset zero in the memory
+	* described by RingBufferGpadlHandle. The downstream ring buffer
+	* follows it at this offset (in pages).
+	*/
+	u32 downstream_ringbuffer_pageoffset;
+
+	/* User-specific data to be passed along to the server endpoint. */
+	unsigned char userdata[MAX_USER_DEFINED_BYTES];
+} __packed;
+
+/* Open Channel Result parameters */
+struct vmbus_channel_open_result {
+	struct vmbus_channel_message_header header;
+	u32 child_relid;
+	u32 openid;
+	u32 status;
+} __packed;
+
+/* Close channel parameters; */
+struct vmbus_channel_close_channel {
+	struct vmbus_channel_message_header header;
+	u32 child_relid;
+} __packed;
+
+/* Channel Message GPADL */
+#define GPADL_TYPE_RING_BUFFER		1
+#define GPADL_TYPE_SERVER_SAVE_AREA	2
+#define GPADL_TYPE_TRANSACTION		8
+
+/*
+ * The number of PFNs in a GPADL message is defined by the number of
+ * pages that would be spanned by ByteCount and ByteOffset.  If the
+ * implied number of PFNs won't fit in this packet, there will be a
+ * follow-up packet that contains more.
+ */
+struct vmbus_channel_gpadl_header {
+	struct vmbus_channel_message_header header;
+	u32 child_relid;
+	u32 gpadl;
+	u16 range_buflen;
+	u16 rangecount;
+	struct gpa_range range[0];
+} __packed;
+
+/* This is the followup packet that contains more PFNs. */
+struct vmbus_channel_gpadl_body {
+	struct vmbus_channel_message_header header;
+	u32 msgnumber;
+	u32 gpadl;
+	u64 pfn[0];
+} __packed;
+
+struct vmbus_channel_gpadl_created {
+	struct vmbus_channel_message_header header;
+	u32 child_relid;
+	u32 gpadl;
+	u32 creation_status;
+} __packed;
+
+struct vmbus_channel_gpadl_teardown {
+	struct vmbus_channel_message_header header;
+	u32 child_relid;
+	u32 gpadl;
+} __packed;
+
+struct vmbus_channel_gpadl_torndown {
+	struct vmbus_channel_message_header header;
+	u32 gpadl;
+} __packed;
+
+#ifdef VMBUS_FEATURE_PARENT_OR_PEER_MEMORY_MAPPED_INTO_A_CHILD
+struct vmbus_channel_view_range_add {
+	struct vmbus_channel_message_header header;
+	PHYSICAL_ADDRESS viewrange_base;
+	u64 viewrange_length;
+	u32 child_relid;
+} __packed;
+
+struct vmbus_channel_view_range_remove {
+	struct vmbus_channel_message_header header;
+	PHYSICAL_ADDRESS viewrange_base;
+	u32 child_relid;
+} __packed;
+#endif
+
+struct vmbus_channel_relid_released {
+	struct vmbus_channel_message_header header;
+	u32 child_relid;
+} __packed;
+
+struct vmbus_channel_initiate_contact {
+	struct vmbus_channel_message_header header;
+	u32 vmbus_version_requested;
+	u32 padding2;
+	u64 interrupt_page;
+	u64 monitor_page1;
+	u64 monitor_page2;
+} __packed;
+
+struct vmbus_channel_version_response {
+	struct vmbus_channel_message_header header;
+	bool version_supported;
+} __packed;
+
+enum vmbus_channel_state {
+	CHANNEL_OFFER_STATE,
+	CHANNEL_OPENING_STATE,
+	CHANNEL_OPEN_STATE,
+};
+
+struct vmbus_channel {
+	struct list_head listentry;
+
+	struct hv_device *device_obj;
+
+	struct timer_list poll_timer; /* SA-111 workaround */
+	struct work_struct work;
+
+	enum vmbus_channel_state state;
+
+	struct vmbus_channel_offer_channel offermsg;
+	/*
+	 * These are based on the OfferMsg.MonitorId.
+	 * Save it here for easy access.
+	 */
+	u8 monitor_grp;
+	u8 monitor_bit;
+
+	u32 ringbuffer_gpadlhandle;
+
+	/* Allocated memory for ring buffer */
+	void *ringbuffer_pages;
+	u32 ringbuffer_pagecount;
+	struct hv_ring_buffer_info outbound;	/* send to parent */
+	struct hv_ring_buffer_info inbound;	/* receive from parent */
+	spinlock_t inbound_lock;
+	struct workqueue_struct *controlwq;
+
+	/* Channel callback are invoked in this workqueue context */
+	/* HANDLE dataWorkQueue; */
+
+	void (*onchannel_callback)(void *context);
+	void *channel_callback_context;
+};
+
+struct vmbus_channel_debug_info {
+	u32 relid;
+	enum vmbus_channel_state state;
+	struct hv_guid interfacetype;
+	struct hv_guid interface_instance;
+	u32 monitorid;
+	u32 servermonitor_pending;
+	u32 servermonitor_latency;
+	u32 servermonitor_connectionid;
+	u32 clientmonitor_pending;
+	u32 clientmonitor_latency;
+	u32 clientmonitor_connectionid;
+
+	struct hv_ring_buffer_debug_info inbound;
+	struct hv_ring_buffer_debug_info outbound;
+};
+
+/*
+ * Represents each channel msg on the vmbus connection This is a
+ * variable-size data structure depending on the msg type itself
+ */
+struct vmbus_channel_msginfo {
+	/* Bookkeeping stuff */
+	struct list_head msglistentry;
+
+	/* So far, this is only used to handle gpadl body message */
+	struct list_head submsglist;
+
+	/* Synchronize the request/response if needed */
+	struct completion  waitevent;
+	union {
+		struct vmbus_channel_version_supported version_supported;
+		struct vmbus_channel_open_result open_result;
+		struct vmbus_channel_gpadl_torndown gpadl_torndown;
+		struct vmbus_channel_gpadl_created gpadl_created;
+		struct vmbus_channel_version_response version_response;
+	} response;
+
+	u32 msgsize;
+	/*
+	 * The channel message that goes out on the "wire".
+	 * It will contain at minimum the VMBUS_CHANNEL_MESSAGE_HEADER header
+	 */
+	unsigned char msg[0];
+};
+
+
+void free_channel(struct vmbus_channel *channel);
+
+void vmbus_onmessage(void *context);
+
+int vmbus_request_offers(void);
+
 #endif /* _HYPERV_H */