/*
 * Copyright (C) 2015 Mihai Carabas <mihai.carabas@gmail.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _VMM_DEV_H_
#define _VMM_DEV_H_

#include <sys/domainset.h>

#include <machine/vmm.h>

#include <dev/vmm/vmm_param.h>

struct vm_memmap {
        vm_paddr_t      gpa;
        int             segid;          /* memory segment */
        vm_ooffset_t    segoff;         /* offset into memory segment */
        size_t          len;            /* mmap length */
        int             prot;           /* RWX */
        int             flags;
};
#define VM_MEMMAP_F_WIRED       0x01

struct vm_munmap {
        vm_paddr_t      gpa;
        size_t          len;
};

#define VM_MEMSEG_NAME(m)       ((m)->name[0] != '\0' ? (m)->name : NULL)
struct vm_memseg {
        int             segid;
        size_t          len;
        char            name[VM_MAX_SUFFIXLEN + 1];
        domainset_t     *ds_mask;
        size_t          ds_mask_size;
        int             ds_policy;
};

struct vm_register {
        int             cpuid;
        int             regnum;         /* enum vm_reg_name */
        uint64_t        regval;
};

struct vm_register_set {
        int             cpuid;
        unsigned int    count;
        const int       *regnums;       /* enum vm_reg_name */
        uint64_t        *regvals;
};

struct vm_run {
        int             cpuid;
        cpuset_t        *cpuset;        /* CPU set storage */
        size_t          cpusetsize;
        struct vm_exit  *vm_exit;
};

struct vm_exception {
        int             cpuid;
        uint64_t        esr;
        uint64_t        far;
};

struct vm_msi {
        uint64_t        msg;
        uint64_t        addr;
        int             bus;
        int             slot;
        int             func;
};

struct vm_capability {
        int             cpuid;
        enum vm_cap_type captype;
        int             capval;
        int             allcpus;
};

#define MAX_VM_STATS    64
struct vm_stats {
        int             cpuid;                          /* in */
        int             index;                          /* in */
        int             num_entries;                    /* out */
        struct timeval  tv;
        uint64_t        statbuf[MAX_VM_STATS];
};
struct vm_stat_desc {
        int             index;                          /* in */
        char            desc[128];                      /* out */
};

struct vm_suspend {
        enum vm_suspend_how how;
};

struct vm_gla2gpa {
        int             vcpuid;         /* inputs */
        int             prot;           /* PROT_READ or PROT_WRITE */
        uint64_t        gla;
        struct vm_guest_paging paging;
        int             fault;          /* outputs */
        uint64_t        gpa;
};

struct vm_activate_cpu {
        int             vcpuid;
};

struct vm_cpuset {
        int             which;
        int             cpusetsize;
        cpuset_t        *cpus;
};
#define VM_ACTIVE_CPUS          0
#define VM_SUSPENDED_CPUS       1
#define VM_DEBUG_CPUS           2

struct vm_vgic_version {
        u_int version;
        u_int flags;
};

struct vm_vgic_descr {
        struct vm_vgic_version ver;
        union {
                struct {
                        uint64_t dist_start;
                        uint64_t dist_size;
                        uint64_t redist_start;
                        uint64_t redist_size;
                } v3_regs;
        };
};

struct vm_irq {
        uint32_t irq;
};

struct vm_cpu_topology {
        uint16_t        sockets;
        uint16_t        cores;
        uint16_t        threads;
        uint16_t        maxcpus;
};

enum {
        /* general routines */
        IOCNUM_ABIVERS = 0,
        IOCNUM_RUN = 1,
        IOCNUM_SET_CAPABILITY = 2,
        IOCNUM_GET_CAPABILITY = 3,
        IOCNUM_SUSPEND = 4,
        IOCNUM_REINIT = 5,

        /* memory apis */
        IOCNUM_GET_GPA_PMAP = 12,
        IOCNUM_GLA2GPA_NOFAULT = 13,
        IOCNUM_ALLOC_MEMSEG = 14,
        IOCNUM_GET_MEMSEG = 15,
        IOCNUM_MMAP_MEMSEG = 16,
        IOCNUM_MMAP_GETNEXT = 17,
        IOCNUM_MUNMAP_MEMSEG = 18,

        /* register/state accessors */
        IOCNUM_SET_REGISTER = 20,
        IOCNUM_GET_REGISTER = 21,
        IOCNUM_SET_REGISTER_SET = 24,
        IOCNUM_GET_REGISTER_SET = 25,

        /* statistics */
        IOCNUM_VM_STATS = 50, 
        IOCNUM_VM_STAT_DESC = 51,

        /* CPU Topology */
        IOCNUM_SET_TOPOLOGY = 63,
        IOCNUM_GET_TOPOLOGY = 64,

        /* interrupt injection */
        IOCNUM_ASSERT_IRQ = 80,
        IOCNUM_DEASSERT_IRQ = 81,
        IOCNUM_RAISE_MSI = 82,
        IOCNUM_INJECT_EXCEPTION = 83,

        /* vm_cpuset */
        IOCNUM_ACTIVATE_CPU = 90,
        IOCNUM_GET_CPUSET = 91,
        IOCNUM_SUSPEND_CPU = 92,
        IOCNUM_RESUME_CPU = 93,

        /* vm_attach_vgic */
        IOCNUM_GET_VGIC_VERSION = 110,
        IOCNUM_ATTACH_VGIC = 111,
};

#define VM_RUN          \
        _IOWR('v', IOCNUM_RUN, struct vm_run)
#define VM_SUSPEND      \
        _IOW('v', IOCNUM_SUSPEND, struct vm_suspend)
#define VM_REINIT       \
        _IO('v', IOCNUM_REINIT)
#define VM_ALLOC_MEMSEG \
        _IOW('v', IOCNUM_ALLOC_MEMSEG, struct vm_memseg)
#define VM_GET_MEMSEG   \
        _IOWR('v', IOCNUM_GET_MEMSEG, struct vm_memseg)
#define VM_MMAP_MEMSEG  \
        _IOW('v', IOCNUM_MMAP_MEMSEG, struct vm_memmap)
#define VM_MMAP_GETNEXT \
        _IOWR('v', IOCNUM_MMAP_GETNEXT, struct vm_memmap)
#define VM_MUNMAP_MEMSEG        \
        _IOW('v', IOCNUM_MUNMAP_MEMSEG, struct vm_munmap)
#define VM_SET_REGISTER \
        _IOW('v', IOCNUM_SET_REGISTER, struct vm_register)
#define VM_GET_REGISTER \
        _IOWR('v', IOCNUM_GET_REGISTER, struct vm_register)
#define VM_SET_REGISTER_SET \
        _IOW('v', IOCNUM_SET_REGISTER_SET, struct vm_register_set)
#define VM_GET_REGISTER_SET \
        _IOWR('v', IOCNUM_GET_REGISTER_SET, struct vm_register_set)
#define VM_SET_CAPABILITY \
        _IOW('v', IOCNUM_SET_CAPABILITY, struct vm_capability)
#define VM_GET_CAPABILITY \
        _IOWR('v', IOCNUM_GET_CAPABILITY, struct vm_capability)
#define VM_STATS \
        _IOWR('v', IOCNUM_VM_STATS, struct vm_stats)
#define VM_STAT_DESC \
        _IOWR('v', IOCNUM_VM_STAT_DESC, struct vm_stat_desc)
#define VM_ASSERT_IRQ \
        _IOW('v', IOCNUM_ASSERT_IRQ, struct vm_irq)
#define VM_DEASSERT_IRQ \
        _IOW('v', IOCNUM_DEASSERT_IRQ, struct vm_irq)
#define VM_RAISE_MSI \
        _IOW('v', IOCNUM_RAISE_MSI, struct vm_msi)
#define VM_INJECT_EXCEPTION     \
        _IOW('v', IOCNUM_INJECT_EXCEPTION, struct vm_exception)
#define VM_SET_TOPOLOGY \
        _IOW('v', IOCNUM_SET_TOPOLOGY, struct vm_cpu_topology)
#define VM_GET_TOPOLOGY \
        _IOR('v', IOCNUM_GET_TOPOLOGY, struct vm_cpu_topology)
#define VM_GLA2GPA_NOFAULT \
        _IOWR('v', IOCNUM_GLA2GPA_NOFAULT, struct vm_gla2gpa)
#define VM_ACTIVATE_CPU \
        _IOW('v', IOCNUM_ACTIVATE_CPU, struct vm_activate_cpu)
#define VM_GET_CPUS     \
        _IOW('v', IOCNUM_GET_CPUSET, struct vm_cpuset)
#define VM_SUSPEND_CPU \
        _IOW('v', IOCNUM_SUSPEND_CPU, struct vm_activate_cpu)
#define VM_RESUME_CPU \
        _IOW('v', IOCNUM_RESUME_CPU, struct vm_activate_cpu)
#define VM_GET_VGIC_VERSION     \
        _IOR('v', IOCNUM_GET_VGIC_VERSION, struct vm_vgic_version)
#define VM_ATTACH_VGIC  \
        _IOW('v', IOCNUM_ATTACH_VGIC, struct vm_vgic_descr)
#endif