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/*
 * Copyright (c) 1998, 2021, Oracle and/or its affiliates.
 */

#ifndef _VM_SEG_GUEST_H
#define	_VM_SEG_GUEST_H

#ifdef	__cplusplus
extern "C" {
#endif

#include <vm/as.h>
#include <vm/mrp_impl.h>
#include <sys/lgrp.h>
#include <sys/zvmm/zvmm.h>

/*
 * VM - Kernel Zone Guest Memory Segment Driver
 */

#if defined(_KERNEL)

#define	SGD_VMEM_NAMELEN	30	/* Same as VMEM_NAMELEN */

/*
 * Used to track segguest's reverse mappings.
 */
typedef struct segguest_rm_node {
	u_offset_t	sgrn_off;
	rm_t		*sgrn_rm;
	avl_node_t	sgrn_node;
} segguest_rm_node_t;

typedef struct segguest_data {
	char		sgmd_name[SGD_VMEM_NAMELEN]; /* vmem name prefix */
	zvmm_meml_t	sgmd_mem_layout;	/* memory layout of guest PA */
	size_t		sgmd_reserved;  /* reserved memory */
	flr_t		*sgmd_flr;	/* our flr */
	mo_t		*sgmd_mo;	/* segment's Memory Object */
	ulong_t		*sgmd_pages;	/* page alloc bitmap */
	szc_t		sgmd_szc;	/* page size code */
	uint8_t		sgmd_rms_alloced; /* !=0 -> memory alloc'ed */
	size_t		sgmd_pgsz;	/* page size */
	uint_t		sgmd_prot;	/* mapping protections */
	size_t		sgmd_realsize;	/* end of last mapped page */
	lgrp_mpi_t	sgmd_policy;	/* mem allocation policy */
	vmem_t		**sgmd_vmem;    /* address allocators */
	u_offset_t	sgmd_vmem_lastpa; /* next vmem span base */
	avl_tree_t	sgmd_rms;	/* for offset to RM translation */
	size_t		sgmd_len;	/* segment length */
	oneszc_wallet_t	sgmd_ws;
	crd_t		*sgmd_crd;
	mrp_t		*sgmd_mrp;
	size_t		sgmd_amount;	/* RAM size (without holes) */
} segguest_data_t;

/*
 * Guest RAM allocation.
 */
typedef struct guestmem {
	size_t		ram_gpa_size;	/* size of GPA space incl PA holes */
	uint_t		ram_lgcnt;

/*
	 * ram_mr describes where to layout each range of memory, there is
	 * one range per lgrp. ram_resuming simply tells us this is not a boot
	 * operation and that we must preserve the exact 1:1 GPA layout
	 * described in ram_mr. In this case memory for more than one lgrp
	 * can live in the same range. If ram_dense_gpa true then layout memory
	 * from [0, maxpa) with no holes and update each range with spa, len
	 * for each lgrp.
	 */
	memrange_t	*ram_mr;
	boolean_t	ram_resuming;
	zvmm_meml_t	ram_layout;
	mrp_t		*ram_mrp;
} guestmem_t;

extern int zvmm_guestmem_setup(const char *, caddr_t *, size_t, guestmem_t *,
    szcmap_t, szc_t *, uint_t, klgrpset_t *);
extern void zvmm_guestmem_destroy(caddr_t, size_t);
extern size_t segguest_getmemsize(struct seg *);
extern int zvmm_guestmem_add(caddr_t, memrange_t *);
extern int zvmm_guestmem_remove(caddr_t, memrange_t *);
extern memrange_t *zvmm_guestmem_list(caddr_t, uint_t *);
extern size_t zvmm_guestmem_getmemsize(caddr_t);

extern  struct seg_ops segguest_ops;

#endif	/* _KERNEL */

#ifdef	__cplusplus
}
#endif

#endif	/* _VM_SEG_GUEST_H */