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/* $OpenBSD: xenvar.h,v 1.19 2016/01/05 13:47:28 mikeb Exp $ */
/*
* Copyright (c) 2015 Mike Belopuhov
*
* 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 _XENVAR_H_
#define _XENVAR_H_
#define XEN_DEBUG
#ifdef XEN_DEBUG
#define DPRINTF(x...) printf(x)
#else
#define DPRINTF(x...)
#endif
struct xen_intsrc {
SLIST_ENTRY(xen_intsrc) xi_entry;
void (*xi_handler)(void *);
void *xi_arg;
struct evcount xi_evcnt;
evtchn_port_t xi_port;
short xi_noclose;
short xi_masked;
};
struct xen_gntent {
SLIST_ENTRY(xen_gntent) ge_entry;
grant_entry_t *ge_table;
grant_ref_t ge_start;
short ge_reserved;
short ge_next;
short ge_free;
struct mutex ge_mtx;
};
struct xen_gntmap {
grant_ref_t gm_ref;
paddr_t gm_paddr;
};
struct xen_softc {
struct device sc_dev;
uint32_t sc_base;
void *sc_hc;
uint32_t sc_features;
#define XENFEAT_CBVEC (1<<8)
struct shared_info *sc_ipg; /* HYPERVISOR_shared_info */
int sc_cbvec; /* callback was installed */
uint64_t sc_irq; /* IDT vector number */
struct evcount sc_evcnt; /* upcall counter */
SLIST_HEAD(, xen_intsrc) sc_intrs;
SLIST_HEAD(, xen_gntent) sc_gnts; /* grant table entries */
int sc_gntcnt; /* number of allocated frames */
/*
* Xenstore
*/
struct xs_softc *sc_xs; /* xenstore softc */
};
extern struct xen_softc *xen_sc;
struct xen_attach_args {
void *xa_parent;
char xa_name[16];
char xa_node[64];
char xa_backend[128];
bus_dma_tag_t xa_dmat;
};
/*
* Grant table references don't convey the information about an actual
* offset of the data within the page, however Xen needs to know it.
* We (ab)use bus_dma_segment's _ds_boundary member to store it. Please
* note that we don't save or restore it's original value atm because
* neither i386 nor amd64 bus_dmamap_unload(9) code needs it.
*/
#define ds_offset _ds_boundary
/*
* Hypercalls
*/
#define XC_MEMORY 12
#define XC_VERSION 17
#define XC_GNTTAB 20
#define XC_EVTCHN 32
#define XC_HVM 34
int xen_hypercall(struct xen_softc *, int, int, ...);
int xen_hypercallv(struct xen_softc *, int, int, ulong *);
/*
* Interrupts
*/
typedef uint32_t xen_intr_handle_t;
void xen_intr(void);
void xen_intr_ack(void);
void xen_intr_signal(xen_intr_handle_t);
int xen_intr_establish(evtchn_port_t, xen_intr_handle_t *, void (*)(void *),
void *, char *);
int xen_intr_disestablish(xen_intr_handle_t);
void xen_intr_enable(void);
void xen_intr_mask(xen_intr_handle_t);
int xen_intr_unmask(xen_intr_handle_t);
/*
* XenStore
*/
#define XS_LIST 0x01
#define XS_READ 0x02
#define XS_TOPEN 0x06
#define XS_TCLOSE 0x07
#define XS_WRITE 0x0b
#define XS_RM 0x0d
#define XS_ERROR 0x10
#define XS_MAX 0x16
struct xs_transaction {
uint32_t xst_id;
uint32_t xst_flags;
#define XST_POLL 0x0001
struct xs_softc *xst_sc;
};
int xs_cmd(struct xs_transaction *, int, const char *, struct iovec **,
int *);
int xs_getprop(struct xen_attach_args *, const char *, char *, int);
int xs_setprop(struct xen_attach_args *, const char *, char *, int);
void xs_resfree(struct xs_transaction *, struct iovec *, int);
#endif /* _XENVAR_H_ */
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