[linux-2.6-block.git] / drivers / hv / hyperv_vmbus.h

/*
 *
 * 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_VMBUS_H
#define _HYPERV_VMBUS_H

#include <linux/list.h>
#include <asm/sync_bitops.h>
#include <asm/hyperv-tlfs.h>
#include <linux/atomic.h>
#include <linux/hyperv.h>
#include <linux/interrupt.h>

#include "hv_trace.h"

/*
 * Timeout for services such as KVP and fcopy.
 */
#define HV_UTIL_TIMEOUT 30

/*
 * Timeout for guest-host handshake for services.
 */
#define HV_UTIL_NEGO_TIMEOUT 55


/* Definitions for the monitored notification facility */
union hv_monitor_trigger_group {
	u64 as_uint64;
	struct {
		u32 pending;
		u32 armed;
	};
};

struct hv_monitor_parameter {
	union hv_connection_id connectionid;
	u16 flagnumber;
	u16 rsvdz;
};

union hv_monitor_trigger_state {
	u32 asu32;

	struct {
		u32 group_enable:4;
		u32 rsvdz:28;
	};
};

/* struct hv_monitor_page Layout */
/* ------------------------------------------------------ */
/* | 0   | TriggerState (4 bytes) | Rsvd1 (4 bytes)     | */
/* | 8   | TriggerGroup[0]                              | */
/* | 10  | TriggerGroup[1]                              | */
/* | 18  | TriggerGroup[2]                              | */
/* | 20  | TriggerGroup[3]                              | */
/* | 28  | Rsvd2[0]                                     | */
/* | 30  | Rsvd2[1]                                     | */
/* | 38  | Rsvd2[2]                                     | */
/* | 40  | NextCheckTime[0][0]    | NextCheckTime[0][1] | */
/* | ...                                                | */
/* | 240 | Latency[0][0..3]                             | */
/* | 340 | Rsvz3[0]                                     | */
/* | 440 | Parameter[0][0]                              | */
/* | 448 | Parameter[0][1]                              | */
/* | ...                                                | */
/* | 840 | Rsvd4[0]                                     | */
/* ------------------------------------------------------ */
struct hv_monitor_page {
	union hv_monitor_trigger_state trigger_state;
	u32 rsvdz1;

	union hv_monitor_trigger_group trigger_group[4];
	u64 rsvdz2[3];

	s32 next_checktime[4][32];

	u16 latency[4][32];
	u64 rsvdz3[32];

	struct hv_monitor_parameter parameter[4][32];

	u8 rsvdz4[1984];
};

#define HV_HYPERCALL_PARAM_ALIGN	sizeof(u64)

/* Definition of the hv_post_message hypercall input structure. */
struct hv_input_post_message {
	union hv_connection_id connectionid;
	u32 reserved;
	u32 message_type;
	u32 payload_size;
	u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT];
};


enum {
	VMBUS_MESSAGE_CONNECTION_ID	= 1,
	VMBUS_MESSAGE_CONNECTION_ID_4	= 4,
	VMBUS_MESSAGE_PORT_ID		= 1,
	VMBUS_EVENT_CONNECTION_ID	= 2,
	VMBUS_EVENT_PORT_ID		= 2,
	VMBUS_MONITOR_CONNECTION_ID	= 3,
	VMBUS_MONITOR_PORT_ID		= 3,
	VMBUS_MESSAGE_SINT		= 2,
};

/*
 * Per cpu state for channel handling
 */
struct hv_per_cpu_context {
	void *synic_message_page;
	void *synic_event_page;
	/*
	 * buffer to post messages to the host.
	 */
	void *post_msg_page;

	/*
	 * Starting with win8, we can take channel interrupts on any CPU;
	 * we will manage the tasklet that handles events messages on a per CPU
	 * basis.
	 */
	struct tasklet_struct msg_dpc;

	/*
	 * To optimize the mapping of relid to channel, maintain
	 * per-cpu list of the channels based on their CPU affinity.
	 */
	struct list_head chan_list;
	struct clock_event_device *clk_evt;
};

struct hv_context {
	/* We only support running on top of Hyper-V
	 * So at this point this really can only contain the Hyper-V ID
	 */
	u64 guestid;

	void *tsc_page;

	struct hv_per_cpu_context __percpu *cpu_context;

	/*
	 * To manage allocations in a NUMA node.
	 * Array indexed by numa node ID.
	 */
	struct cpumask *hv_numa_map;
};

extern struct hv_context hv_context;

/* Hv Interface */

extern int hv_init(void);

extern int hv_post_message(union hv_connection_id connection_id,
			 enum hv_message_type message_type,
			 void *payload, size_t payload_size);

extern int hv_synic_alloc(void);

extern void hv_synic_free(void);

extern int hv_synic_init(unsigned int cpu);

extern int hv_synic_cleanup(unsigned int cpu);

extern void hv_synic_clockevents_cleanup(void);

/* Interface */

void hv_ringbuffer_pre_init(struct vmbus_channel *channel);

int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info,
		       struct page *pages, u32 pagecnt);

void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info);

int hv_ringbuffer_write(struct vmbus_channel *channel,
			const struct kvec *kv_list, u32 kv_count);

int hv_ringbuffer_read(struct vmbus_channel *channel,
		       void *buffer, u32 buflen, u32 *buffer_actual_len,
		       u64 *requestid, bool raw);

/*
 * Maximum channels is determined by the size of the interrupt page
 * which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt
 * and the other is receive endpoint interrupt
 */
#define MAX_NUM_CHANNELS	((PAGE_SIZE >> 1) << 3)	/* 16348 channels */

/* The value here must be in multiple of 32 */
/* TODO: Need to make this configurable */
#define MAX_NUM_CHANNELS_SUPPORTED	256


enum vmbus_connect_state {
	DISCONNECTED,
	CONNECTING,
	CONNECTED,
	DISCONNECTING
};

#define MAX_SIZE_CHANNEL_MESSAGE	HV_MESSAGE_PAYLOAD_BYTE_COUNT

struct vmbus_connection {
	/*
	 * CPU on which the initial host contact was made.
	 */
	int connect_cpu;

	u32 msg_conn_id;

	atomic_t offer_in_progress;

	enum vmbus_connect_state conn_state;

	atomic_t next_gpadl_handle;

	struct completion  unload_event;
	/*
	 * Represents channel interrupts. Each bit position represents a
	 * channel.  When a channel sends an interrupt via VMBUS, it finds its
	 * bit in the sendInterruptPage, set it and calls Hv to generate a port
	 * event. The other end receives the port event and parse the
	 * recvInterruptPage to see which bit is set
	 */
	void *int_page;
	void *send_int_page;
	void *recv_int_page;

	/*
	 * 2 pages - 1st page for parent->child notification and 2nd
	 * is child->parent notification
	 */
	struct hv_monitor_page *monitor_pages[2];
	struct list_head chn_msg_list;
	spinlock_t channelmsg_lock;

	/* List of channels */
	struct list_head chn_list;
	struct mutex channel_mutex;

	/*
	 * An offer message is handled first on the work_queue, and then
	 * is further handled on handle_primary_chan_wq or
	 * handle_sub_chan_wq.
	 */
	struct workqueue_struct *work_queue;
	struct workqueue_struct *handle_primary_chan_wq;
	struct workqueue_struct *handle_sub_chan_wq;
};


struct vmbus_msginfo {
	/* Bookkeeping stuff */
	struct list_head msglist_entry;

	/* The message itself */
	unsigned char msg[0];
};


extern struct vmbus_connection vmbus_connection;

static inline void vmbus_send_interrupt(u32 relid)
{
	sync_set_bit(relid, vmbus_connection.send_int_page);
}

enum vmbus_message_handler_type {
	/* The related handler can sleep. */
	VMHT_BLOCKING = 0,

	/* The related handler must NOT sleep. */
	VMHT_NON_BLOCKING = 1,
};

struct vmbus_channel_message_table_entry {
	enum vmbus_channel_message_type message_type;
	enum vmbus_message_handler_type handler_type;
	void (*message_handler)(struct vmbus_channel_message_header *msg);
};

extern const struct vmbus_channel_message_table_entry
	channel_message_table[CHANNELMSG_COUNT];


/* General vmbus interface */

struct hv_device *vmbus_device_create(const guid_t *type,
				      const guid_t *instance,
				      struct vmbus_channel *channel);

int vmbus_device_register(struct hv_device *child_device_obj);
void vmbus_device_unregister(struct hv_device *device_obj);
int vmbus_add_channel_kobj(struct hv_device *device_obj,
			   struct vmbus_channel *channel);

void vmbus_remove_channel_attr_group(struct vmbus_channel *channel);

struct vmbus_channel *relid2channel(u32 relid);

void vmbus_free_channels(void);

/* Connection interface */

int vmbus_connect(void);
void vmbus_disconnect(void);

int vmbus_post_msg(void *buffer, size_t buflen, bool can_sleep);

void vmbus_on_event(unsigned long data);
void vmbus_on_msg_dpc(unsigned long data);

int hv_kvp_init(struct hv_util_service *srv);
void hv_kvp_deinit(void);
void hv_kvp_onchannelcallback(void *context);

int hv_vss_init(struct hv_util_service *srv);
void hv_vss_deinit(void);
void hv_vss_onchannelcallback(void *context);

int hv_fcopy_init(struct hv_util_service *srv);
void hv_fcopy_deinit(void);
void hv_fcopy_onchannelcallback(void *context);
void vmbus_initiate_unload(bool crash);

static inline void hv_poll_channel(struct vmbus_channel *channel,
				   void (*cb)(void *))
{
	if (!channel)
		return;

	if (in_interrupt() && (channel->target_cpu == smp_processor_id())) {
		cb(channel);
		return;
	}
	smp_call_function_single(channel->target_cpu, cb, channel, true);
}

enum hvutil_device_state {
	HVUTIL_DEVICE_INIT = 0,  /* driver is loaded, waiting for userspace */
	HVUTIL_READY,            /* userspace is registered */
	HVUTIL_HOSTMSG_RECEIVED, /* message from the host was received */
	HVUTIL_USERSPACE_REQ,    /* request to userspace was sent */
	HVUTIL_USERSPACE_RECV,   /* reply from userspace was received */
	HVUTIL_DEVICE_DYING,     /* driver unload is in progress */
};

#endif /* _HYPERV_VMBUS_H */
Commit	Line	Data
0f2a6619 S	1	/*
	2	*
	3	* Copyright (c) 2011, Microsoft Corporation.
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms and conditions of the GNU General Public License,
	7	* version 2, as published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*
	14	* You should have received a copy of the GNU General Public License along with
	15	* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
	16	* Place - Suite 330, Boston, MA 02111-1307 USA.
	17	*
	18	* Authors:
	19	* Haiyang Zhang <haiyangz@microsoft.com>
	20	* Hank Janssen <hjanssen@microsoft.com>
	21	* K. Y. Srinivasan <kys@microsoft.com>
	22	*
	23	*/
	24
	25	#ifndef _HYPERV_VMBUS_H
	26	#define _HYPERV_VMBUS_H
	27
43c698b9 S	28	#include <linux/list.h>
43c698b9 S	29	#include <asm/sync_bitops.h>
5a485803	30	#include <asm/hyperv-tlfs.h>
43c698b9	31	#include <linux/atomic.h>
46a97191	32	#include <linux/hyperv.h>
37cdd991	33	#include <linux/interrupt.h>
43c698b9	34
c9fe0f8f VK	35	#include "hv_trace.h"
c9fe0f8f VK	36
c0b200cf S	37	/*
	38	* Timeout for services such as KVP and fcopy.
	39	*/
	40	#define HV_UTIL_TIMEOUT 30
	41
4dbfc2e6 VK	42	/*
	43	* Timeout for guest-host handshake for services.
	44	*/
d7edd31b	45	#define HV_UTIL_NEGO_TIMEOUT 55
4dbfc2e6	46
afbdc4a9 S	47
	48	/* Definitions for the monitored notification facility */
	49	union hv_monitor_trigger_group {
	50	u64 as_uint64;
	51	struct {
	52	u32 pending;
	53	u32 armed;
	54	};
	55	};
	56
	57	struct hv_monitor_parameter {
	58	union hv_connection_id connectionid;
	59	u16 flagnumber;
	60	u16 rsvdz;
	61	};
	62
	63	union hv_monitor_trigger_state {
	64	u32 asu32;
	65
	66	struct {
	67	u32 group_enable:4;
	68	u32 rsvdz:28;
	69	};
	70	};
	71
	72	/* struct hv_monitor_page Layout */
	73	/* ------------------------------------------------------ */
	74	/* \| 0 \| TriggerState (4 bytes) \| Rsvd1 (4 bytes) \| */
	75	/* \| 8 \| TriggerGroup[0] \| */
	76	/* \| 10 \| TriggerGroup[1] \| */
	77	/* \| 18 \| TriggerGroup[2] \| */
	78	/* \| 20 \| TriggerGroup[3] \| */
	79	/* \| 28 \| Rsvd2[0] \| */
	80	/* \| 30 \| Rsvd2[1] \| */
	81	/* \| 38 \| Rsvd2[2] \| */
	82	/* \| 40 \| NextCheckTime[0][0] \| NextCheckTime[0][1] \| */
	83	/* \| ... \| */
	84	/* \| 240 \| Latency[0][0..3] \| */
	85	/* \| 340 \| Rsvz3[0] \| */
	86	/* \| 440 \| Parameter[0][0] \| */
	87	/* \| 448 \| Parameter[0][1] \| */
	88	/* \| ... \| */
	89	/* \| 840 \| Rsvd4[0] \| */
	90	/* ------------------------------------------------------ */
	91	struct hv_monitor_page {
	92	union hv_monitor_trigger_state trigger_state;
	93	u32 rsvdz1;
	94
	95	union hv_monitor_trigger_group trigger_group[4];
	96	u64 rsvdz2[3];
	97
	98	s32 next_checktime[4][32];
	99
	100	u16 latency[4][32];
	101	u64 rsvdz3[32];
	102
	103	struct hv_monitor_parameter parameter[4][32];
	104
	105	u8 rsvdz4[1984];
	106	};
	107
8e27a236 S	108	#define HV_HYPERCALL_PARAM_ALIGN sizeof(u64)
8e27a236 S	109
afbdc4a9 S	110	/* Definition of the hv_post_message hypercall input structure. */
	111	struct hv_input_post_message {
	112	union hv_connection_id connectionid;
	113	u32 reserved;
7797dcf6	114	u32 message_type;
afbdc4a9 S	115	u32 payload_size;
	116	u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT];
	117	};
	118
afbdc4a9	119
3645a917 S	120	enum {
3645a917 S	121	VMBUS_MESSAGE_CONNECTION_ID = 1,
ae20b254	122	VMBUS_MESSAGE_CONNECTION_ID_4 = 4,
3645a917 S	123	VMBUS_MESSAGE_PORT_ID = 1,
	124	VMBUS_EVENT_CONNECTION_ID = 2,
	125	VMBUS_EVENT_PORT_ID = 2,
	126	VMBUS_MONITOR_CONNECTION_ID = 3,
	127	VMBUS_MONITOR_PORT_ID = 3,
	128	VMBUS_MESSAGE_SINT = 2,
	129	};
	130
37cdd991 SH	131	/*
	132	* Per cpu state for channel handling
	133	*/
	134	struct hv_per_cpu_context {
	135	void *synic_message_page;
	136	void *synic_event_page;
	137	/*
	138	* buffer to post messages to the host.
	139	*/
	140	void *post_msg_page;
	141
	142	/*
	143	* Starting with win8, we can take channel interrupts on any CPU;
	144	* we will manage the tasklet that handles events messages on a per CPU
	145	* basis.
	146	*/
37cdd991 SH	147	struct tasklet_struct msg_dpc;
	148
	149	/*
	150	* To optimize the mapping of relid to channel, maintain
	151	* per-cpu list of the channels based on their CPU affinity.
	152	*/
	153	struct list_head chan_list;
	154	struct clock_event_device *clk_evt;
	155	};
	156
3645a917 S	157	struct hv_context {
3645a917 S	158	/* We only support running on top of Hyper-V
2a9d7de2 SH	159	* So at this point this really can only contain the Hyper-V ID
2a9d7de2 SH	160	*/
3645a917 S	161	u64 guestid;
3645a917 S	162
ca9357bd	163	void *tsc_page;
3645a917	164
37cdd991 SH	165	struct hv_per_cpu_context __percpu *cpu_context;
37cdd991 SH	166
9f01ec53 S	167	/*
	168	* To manage allocations in a NUMA node.
	169	* Array indexed by numa node ID.
	170	*/
	171	struct cpumask *hv_numa_map;
3645a917 S	172	};
	173
	174	extern struct hv_context hv_context;
	175
3645a917 S	176	/* Hv Interface */
	177
	178	extern int hv_init(void);
	179
415f0a02	180	extern int hv_post_message(union hv_connection_id connection_id,
3645a917 S	181	enum hv_message_type message_type,
	182	void *payload, size_t payload_size);
	183
2608fb65 JW	184	extern int hv_synic_alloc(void);
	185
	186	extern void hv_synic_free(void);
	187
76d36ab7	188	extern int hv_synic_init(unsigned int cpu);
3645a917	189
76d36ab7	190	extern int hv_synic_cleanup(unsigned int cpu);
3645a917	191
e086748c VK	192	extern void hv_synic_clockevents_cleanup(void);
e086748c VK	193
940655c1 S	194	/* Interface */
940655c1 S	195
14948e39	196	void hv_ringbuffer_pre_init(struct vmbus_channel *channel);
940655c1	197
9988ce68 VK	198	int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info,
9988ce68 VK	199	struct page *pages, u32 pagecnt);
940655c1 S	200
	201	void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info);
	202
1f6ee4e7	203	int hv_ringbuffer_write(struct vmbus_channel *channel,
e4165a0f	204	const struct kvec *kv_list, u32 kv_count);
940655c1	205
3372592a	206	int hv_ringbuffer_read(struct vmbus_channel *channel,
940b68e2	207	void buffer, u32 buflen, u32 buffer_actual_len,
3372592a	208	u64 *requestid, bool raw);
940655c1	209
89b2ca47 S	210	/*
	211	* Maximum channels is determined by the size of the interrupt page
	212	* which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt
	213	* and the other is receive endpoint interrupt
	214	*/
	215	#define MAX_NUM_CHANNELS ((PAGE_SIZE >> 1) << 3) /* 16348 channels */
	216
	217	/* The value here must be in multiple of 32 */
	218	/* TODO: Need to make this configurable */
	219	#define MAX_NUM_CHANNELS_SUPPORTED 256
	220
	221
	222	enum vmbus_connect_state {
	223	DISCONNECTED,
	224	CONNECTING,
	225	CONNECTED,
	226	DISCONNECTING
	227	};
	228
	229	#define MAX_SIZE_CHANNEL_MESSAGE HV_MESSAGE_PAYLOAD_BYTE_COUNT
	230
	231	struct vmbus_connection {
54a66265 S	232	/*
	233	* CPU on which the initial host contact was made.
	234	*/
	235	int connect_cpu;
	236
ae20b254 DC	237	u32 msg_conn_id;
ae20b254 DC	238
54a66265 S	239	atomic_t offer_in_progress;
54a66265 S	240
89b2ca47 S	241	enum vmbus_connect_state conn_state;
	242
	243	atomic_t next_gpadl_handle;
	244
2db84eff	245	struct completion unload_event;
89b2ca47 S	246	/*
	247	* Represents channel interrupts. Each bit position represents a
	248	* channel. When a channel sends an interrupt via VMBUS, it finds its
	249	* bit in the sendInterruptPage, set it and calls Hv to generate a port
	250	* event. The other end receives the port event and parse the
	251	* recvInterruptPage to see which bit is set
	252	*/
	253	void *int_page;
	254	void *send_int_page;
	255	void *recv_int_page;
	256
	257	/*
	258	* 2 pages - 1st page for parent->child notification and 2nd
	259	* is child->parent notification
	260	*/
8681db44	261	struct hv_monitor_page *monitor_pages[2];
89b2ca47 S	262	struct list_head chn_msg_list;
	263	spinlock_t channelmsg_lock;
	264
	265	/* List of channels */
	266	struct list_head chn_list;
d6f591e3	267	struct mutex channel_mutex;
89b2ca47	268
37c2578c DC	269	/*
	270	* An offer message is handled first on the work_queue, and then
	271	* is further handled on handle_primary_chan_wq or
	272	* handle_sub_chan_wq.
	273	*/
89b2ca47	274	struct workqueue_struct *work_queue;
37c2578c DC	275	struct workqueue_struct *handle_primary_chan_wq;
37c2578c DC	276	struct workqueue_struct *handle_sub_chan_wq;
89b2ca47 S	277	};
	278
	279
	280	struct vmbus_msginfo {
	281	/* Bookkeeping stuff */
	282	struct list_head msglist_entry;
	283
	284	/* The message itself */
	285	unsigned char msg[0];
	286	};
	287
	288
	289	extern struct vmbus_connection vmbus_connection;
	290
5c1bec61 SH	291	static inline void vmbus_send_interrupt(u32 relid)
	292	{
	293	sync_set_bit(relid, vmbus_connection.send_int_page);
	294	}
	295
652594c7 DC	296	enum vmbus_message_handler_type {
	297	/* The related handler can sleep. */
	298	VMHT_BLOCKING = 0,
	299
	300	/* The related handler must NOT sleep. */
	301	VMHT_NON_BLOCKING = 1,
	302	};
	303
	304	struct vmbus_channel_message_table_entry {
	305	enum vmbus_channel_message_type message_type;
	306	enum vmbus_message_handler_type handler_type;
	307	void (message_handler)(struct vmbus_channel_message_header msg);
	308	};
	309
e6242fa0	310	extern const struct vmbus_channel_message_table_entry
652594c7 DC	311	channel_message_table[CHANNELMSG_COUNT];
652594c7 DC	312
0f70b669	313
89b2ca47 S	314	/* General vmbus interface */
89b2ca47 S	315
593db803 AS	316	struct hv_device vmbus_device_create(const guid_t type,
593db803 AS	317	const guid_t *instance,
1b9d48f2	318	struct vmbus_channel *channel);
89b2ca47	319
22794281	320	int vmbus_device_register(struct hv_device *child_device_obj);
696453ba	321	void vmbus_device_unregister(struct hv_device *device_obj);
c2e5df61 SH	322	int vmbus_add_channel_kobj(struct hv_device *device_obj,
c2e5df61 SH	323	struct vmbus_channel *channel);
89b2ca47	324
46fc1548 KB	325	void vmbus_remove_channel_attr_group(struct vmbus_channel *channel);
46fc1548 KB	326
d43e2fe7	327	struct vmbus_channel *relid2channel(u32 relid);
89b2ca47	328
93e5bd06	329	void vmbus_free_channels(void);
89b2ca47 S	330
	331	/* Connection interface */
	332
	333	int vmbus_connect(void);
09a19628	334	void vmbus_disconnect(void);
89b2ca47	335
c0bb0392	336	int vmbus_post_msg(void *buffer, size_t buflen, bool can_sleep);
89b2ca47	337
89b2ca47	338	void vmbus_on_event(unsigned long data);
d81274aa	339	void vmbus_on_msg_dpc(unsigned long data);
89b2ca47	340
2a9d7de2	341	int hv_kvp_init(struct hv_util_service *srv);
3647a83d	342	void hv_kvp_deinit(void);
2a9d7de2	343	void hv_kvp_onchannelcallback(void *context);
3647a83d	344
2a9d7de2	345	int hv_vss_init(struct hv_util_service *srv);
3647a83d	346	void hv_vss_deinit(void);
2a9d7de2	347	void hv_vss_onchannelcallback(void *context);
3647a83d	348
2a9d7de2	349	int hv_fcopy_init(struct hv_util_service *srv);
01325476	350	void hv_fcopy_deinit(void);
2a9d7de2	351	void hv_fcopy_onchannelcallback(void *context);
75ff3a8a	352	void vmbus_initiate_unload(bool crash);
01325476	353
8efe78fd VK	354	static inline void hv_poll_channel(struct vmbus_channel *channel,
	355	void (cb)(void ))
	356	{
	357	if (!channel)
	358	return;
	359
1e052a16 S	360	if (in_interrupt() && (channel->target_cpu == smp_processor_id())) {
	361	cb(channel);
	362	return;
	363	}
3cace4a6	364	smp_call_function_single(channel->target_cpu, cb, channel, true);
8efe78fd	365	}
89b2ca47	366
636c88da VK	367	enum hvutil_device_state {
	368	HVUTIL_DEVICE_INIT = 0, /* driver is loaded, waiting for userspace */
	369	HVUTIL_READY, /* userspace is registered */
	370	HVUTIL_HOSTMSG_RECEIVED, /* message from the host was received */
	371	HVUTIL_USERSPACE_REQ, /* request to userspace was sent */
	372	HVUTIL_USERSPACE_RECV, /* reply from userspace was received */
	373	HVUTIL_DEVICE_DYING, /* driver unload is in progress */
	374	};
	375
0f2a6619	376	#endif /* _HYPERV_VMBUS_H */