hypervvar.h

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Author : mikeb
Date : 2017-06-23 19:05:42
Hash : 8f767439
Message : Introduce deferred interrupt processing capability Hyper-V interrupts seem to be sometimes delivered before the message becomes available on the channel ring. This is reproducible on hvs(4) under load. This change is modelled on the workaround found in the Linux driver.
sys/dev/pv/hypervvar.h
/*
 * Copyright (c) 2016 Mike Belopuhov <mike@esdenera.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef _DEV_PV_HYPERVVAR_H_
#define _DEV_PV_HYPERVVAR_H_

/* #define HYPERV_DEBUG */

#ifdef HYPERV_DEBUG
#define DPRINTF(x...)		printf(x)
#else
#define DPRINTF(x...)
#endif

struct hv_softc;

struct hv_msg {
	uint64_t			 msg_flags;
#define  MSGF_NOSLEEP			  0x0001
#define  MSGF_NOQUEUE			  0x0002
#define  MSGF_ORPHANED			  0x0004
	struct hypercall_postmsg_in	 msg_req; /* must be 8 byte aligned */
	void				*msg_rsp;
	size_t				 msg_rsplen;
	TAILQ_ENTRY(hv_msg)		 msg_entry;
};
TAILQ_HEAD(hv_queue, hv_msg);

struct hv_offer {
	struct vmbus_chanmsg_choffer	 co_chan;
	SIMPLEQ_ENTRY(hv_offer)		 co_entry;
};
SIMPLEQ_HEAD(hv_offers, hv_offer);

struct hv_ring_data {
	struct vmbus_bufring		*rd_ring;
	uint32_t			 rd_size;
	struct mutex			 rd_lock;
	uint32_t			 rd_prod;
	uint32_t			 rd_cons;
	uint32_t			 rd_dsize;
};

struct hv_channel {
	struct hv_softc			*ch_sc;

	int				 ch_state;
#define  HV_CHANSTATE_OFFERED		  1
#define  HV_CHANSTATE_OPENED		  2
#define  HV_CHANSTATE_CLOSING		  3
#define  HV_CHANSTATE_CLOSED		  4
	uint32_t			 ch_id;

	struct hv_guid			 ch_type;
	struct hv_guid			 ch_inst;
	char				 ch_ident[38];

	void				*ch_ring;
	uint32_t			 ch_ring_gpadl;
	u_long				 ch_ring_size;

	struct hv_ring_data		 ch_wrd;
	struct hv_ring_data		 ch_rrd;

	uint32_t			 ch_vcpu;

	void				(*ch_handler)(void *);
	void				 *ch_ctx;
	struct evcount			  ch_evcnt;
	struct taskq			*ch_taskq;
	struct task			 ch_task;

	uint32_t			 ch_flags;
#define  CHF_BATCHED			  0x0001
#define  CHF_MONITOR			  0x0002

	uint8_t				 ch_mgroup;
	uint8_t				 ch_mindex;
	struct hv_mon_param		 ch_monprm __attribute__((aligned(8)));

	TAILQ_ENTRY(hv_channel)		 ch_entry;
};
TAILQ_HEAD(hv_channels, hv_channel);

struct hv_attach_args {
	void				*aa_parent;
	bus_dma_tag_t			 aa_dmat;
	struct hv_guid			*aa_type;
	struct hv_guid			*aa_inst;
	char				*aa_ident;
	struct hv_channel		*aa_chan;
};

struct hv_dev {
	struct hv_attach_args		 dv_aa;
	SLIST_ENTRY(hv_dev)		 dv_entry;
};
SLIST_HEAD(hv_devices, hv_dev);

struct hv_softc {
	struct device			 sc_dev;
	struct pvbus_hv			*sc_pvbus;
	struct bus_dma_tag		*sc_dmat;

	void				*sc_hc;
	uint32_t			 sc_features;

	uint32_t			 sc_flags;
#define  HSF_CONNECTED			  0x0001
#define  HSF_OFFERS_DELIVERED		  0x0002

	int				 sc_idtvec;
	int				 sc_proto;

	/* CPU id to VCPU id mapping */
	uint32_t			 sc_vcpus[1];	/* XXX: per-cpu */
	/* Synthetic Interrupt Message Page (SIMP) */
	void				*sc_simp[1];	/* XXX: per-cpu */
	/* Synthetic Interrupt Event Flags Page (SIEFP) */
	void				*sc_siep[1];	/* XXX: per-cpu */

	/* Channel port events page */
	void				*sc_events;
	u_long				*sc_wevents;	/* Write events */
	u_long				*sc_revents;	/* Read events */

	/* Monitor pages for parent<->child notifications */
	struct vmbus_mnf		*sc_monitor[2];

	struct hv_queue	 		 sc_reqs;	/* Request queue */
	struct mutex			 sc_reqlck;
	struct hv_queue	 		 sc_rsps;	/* Response queue */
	struct mutex			 sc_rsplck;

	struct hv_offers		 sc_offers;
	struct mutex			 sc_offerlck;

	struct hv_channels		 sc_channels;
	struct mutex			 sc_channelck;

	volatile uint32_t		 sc_handle;

	struct hv_devices		 sc_devs;
	struct mutex			 sc_devlck;

	struct task			 sc_sdtask;	/* shutdown */

	struct ksensordev		 sc_sensordev;
	struct ksensor			 sc_sensor;
};

static __inline void
clear_bit(u_int b, volatile void *p)
{
	atomic_clearbits_int(((volatile u_int *)p) + (b >> 5), 1 << (b & 0x1f));
}

static __inline void
set_bit(u_int b, volatile void *p)
{
	atomic_setbits_int(((volatile u_int *)p) + (b >> 5), 1 << (b & 0x1f));
}

static __inline int
test_bit(u_int b, volatile void *p)
{
	return !!(((volatile u_int *)p)[b >> 5] & (1 << (b & 0x1f)));
}

extern const struct hv_guid hv_guid_network;
extern const struct hv_guid hv_guid_ide;
extern const struct hv_guid hv_guid_scsi;
extern const struct hv_guid hv_guid_shutdown;
extern const struct hv_guid hv_guid_timesync;
extern const struct hv_guid hv_guid_heartbeat;
extern const struct hv_guid hv_guid_kvp;
#ifdef HYPERV_DEBUG
extern const struct hv_guid hv_guid_vss;
extern const struct hv_guid hv_guid_dynmem;
extern const struct hv_guid hv_guid_mouse;
extern const struct hv_guid hv_guid_kbd;
extern const struct hv_guid hv_guid_video;
extern const struct hv_guid hv_guid_fc;
extern const struct hv_guid hv_guid_fcopy;
extern const struct hv_guid hv_guid_pcie;
extern const struct hv_guid hv_guid_netdir;
extern const struct hv_guid hv_guid_rdesktop;
extern const struct hv_guid hv_guid_avma1;
extern const struct hv_guid hv_guid_avma2;
extern const struct hv_guid hv_guid_avma3;
extern const struct hv_guid hv_guid_avma4;
#endif	/* HYPERV_DEBUG */

int	hv_handle_alloc(struct hv_channel *, void *, uint32_t, uint32_t *);
void	hv_handle_free(struct hv_channel *, uint32_t);
int	hv_channel_open(struct hv_channel *, size_t, void *, size_t,
	    void (*)(void *), void *);
int	hv_channel_close(struct hv_channel *);
int	hv_channel_setdeferred(struct hv_channel *, const char *);
void	hv_channel_schedule(struct hv_channel *);
void	hv_evcount_attach(struct hv_channel *, const char *);
int	hv_channel_send(struct hv_channel *, void *, uint32_t, uint64_t,
	    int, uint32_t);
int	hv_channel_send_sgl(struct hv_channel *, struct vmbus_gpa *,
	    uint32_t, void *, uint32_t, uint64_t);
int	hv_channel_send_prpl(struct hv_channel *, struct vmbus_gpa_range *,
	    uint32_t, void *, uint32_t, uint64_t);
int	hv_channel_recv(struct hv_channel *, void *, uint32_t, uint32_t *,
	    uint64_t *, int);

#endif	/* _DEV_PV_HYPERVVAR_H_ */
IABSD.fr/src/sys/dev/pv/hypervvar.h

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IABSD.fr/src /sys/dev/pv/hypervvar.h
