r0drv/solaris/memobj-r0drv-solaris.h

	memobj-r0drv-solaris.h revision 257de41d6538efed2a3741b7669531fcf6a50823
/* $Id$ */
/** @file
 * IPRT - Ring-0 Memory Objects - Segment driver, Solaris.
 */

/*
 * Copyright (C) 2012 Oracle Corporation
 *
 * This file is part of VirtualBox Open Source Edition (OSE), as
 * available from http://www.virtualbox.org. This file is free software;
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software
 * Foundation, in version 2 as it comes in the "COPYING" file of the
 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
 *
 * The contents of this file may alternatively be used under the terms
 * of the Common Development and Distribution License Version 1.0
 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
 * VirtualBox OSE distribution, in which case the provisions of the
 * CDDL are applicable instead of those of the GPL.
 *
 * You may elect to license modified versions of this file under the
 * terms and conditions of either the GPL or the CDDL or both.
 */


#ifndef ___r0drv_solaris_memobj_r0drv_solaris_h
#define ___r0drv_solaris_memobj_r0drv_solaris_h

/*******************************************************************************
*   Header Files                                                               *
*******************************************************************************/
#include "the-solaris-kernel.h"


/*******************************************************************************
*   Structures and Typedefs                                                    *
*******************************************************************************/
typedef struct SEGVBOX_CRARGS
{
    uint64_t *paPhysAddrs;
    uint_t    fPageAccess;
} SEGVBOX_CRARGS;
typedef SEGVBOX_CRARGS *PSEGVBOX_CRARGS;

typedef struct SEGVBOX_DATA
{
    uint_t    fPageAccess;
} SEGVBOX_DATA;
typedef SEGVBOX_DATA *PSEGVBOX_DATA;

static struct seg_ops s_SegVBoxOps;
static vnode_t s_segVBoxVnode;


DECLINLINE(int) rtR0SegVBoxSolCreate(seg_t *pSeg, void *pvArgs)
{
    struct as      *pAddrSpace = pSeg->s_as;
    PSEGVBOX_CRARGS pArgs      = pvArgs;
    PSEGVBOX_DATA   pData      = kmem_zalloc(sizeof(*pData), KM_SLEEP);

    AssertPtr(pAddrSpace);
    AssertPtr(pArgs);
    AssertPtr(pData);

    hat_map(pAddrSpace->a_hat, pSeg->s_base, pSeg->s_size, HAT_MAP);
    pData->fPageAccess = pArgs->fPageAccess | PROT_USER;

    pSeg->s_ops  = &s_SegVBoxOps;
    pSeg->s_data = pData;

    /*
     * Now load the locked mappings to the pages.
     */
    caddr_t virtAddr = pSeg->s_base;
    pgcnt_t cPages   = (pSeg->s_size + PAGESIZE - 1) >> PAGESHIFT;
    for (pgcnt_t iPage = 0; iPage < cPages; ++iPage, virtAddr += PAGESIZE)
    {
        hat_devload(pAddrSpace->a_hat, virtAddr, PAGESIZE, pArgs->paPhysAddrs[iPage] >> PAGESHIFT,
                    pData->fPageAccess | HAT_UNORDERED_OK, HAT_LOAD | HAT_LOAD_LOCK);
    }

    return 0;
}


static int rtR0SegVBoxSolDup(seg_t *pSrcSeg, seg_t *pDstSeg)
{
    /*
     * Duplicate a segment and return the new segment in 'pDstSeg'.
     */
    PSEGVBOX_DATA pSrcData = pSrcSeg->s_data;
    PSEGVBOX_DATA pDstData = kmem_zalloc(sizeof(*pDstData), KM_SLEEP);

    AssertPtr(pDstData);
    AssertPtr(pSrcData);

    pDstData->fPageAccess  = pSrcData->fPageAccess;
    pDstSeg->s_ops         = &s_SegVBoxOps;
    pDstSeg->s_data        = pDstData;

    return 0;
}


static int rtR0SegVBoxSolUnmap(seg_t *pSeg, caddr_t virtAddr, size_t cb)
{
    /** @todo make these into release assertions. */
    if (   virtAddr < pSeg->s_base
        || virtAddr + cb > pSeg->s_base + pSeg->s_size
        || (cb & PAGEOFFSET) || ((uintptr_t)virtAddr & PAGEOFFSET))
    {
        panic("rtRt0SegVBoxSolUnmap");
    }

    if (virtAddr != pSeg->s_base || cb != pSeg->s_size)
        return ENOTSUP;

    hat_unload(pSeg->s_as->a_hat, virtAddr, cb, HAT_UNLOAD_UNMAP | HAT_UNLOAD_UNLOCK);

    seg_free(pSeg);
    return 0;
}


static void rtR0SegVBoxSolFree(seg_t *pSeg)
{
    PSEGVBOX_DATA pData = pSeg->s_data;
    kmem_free(pData, sizeof(*pData));
}


static int rtR0SegVBoxSolFault(struct hat *pHat, seg_t *pSeg, caddr_t virtAddr, size_t cb, enum fault_type FaultType,
                               enum seg_rw ReadWrite)
{
    /*
     * We would demand fault if the (u)read() path would SEGOP_FAULT() on buffers mapped in via our
     * segment driver i.e. prefaults before DMA. Don't fail in such case where we're called directly,
     * see #5047.
     */
    return 0;
}


static int rtR0SegVBoxSolFaultA(seg_t *pSeg, caddr_t virtAddr)
{
    return 0;
}


static int rtR0SegVBoxSolSetProt(seg_t *pSeg, caddr_t virtAddr, size_t cb, uint_t fPageAccess)
{
    return EACCES;
}


static int rtR0SegVBoxSolCheckProt(seg_t *pSeg, caddr_t virtAddr, size_t cb, uint_t fPageAccess)
{
    return EINVAL;
}


static int rtR0SegVBoxSolKluster(seg_t *pSeg, caddr_t virtAddr, ssize_t Delta)
{
    return -1;
}


static int rtR0SegVBoxSolSync(seg_t *pSeg, caddr_t virtAddr, size_t cb, int Attr, uint_t fFlags)
{
    return 0;
}


static size_t rtR0SegVBoxSolInCore(seg_t *pSeg, caddr_t virtAddr, size_t cb, char *pVec)
{
    size_t cbLen = (cb + PAGEOFFSET) & PAGEMASK;
    for (virtAddr = 0; cbLen != 0; cbLen -= PAGESIZE, virtAddr += PAGESIZE)
        *pVec++ = 1;
    return cbLen;
}


static int rtR0SegVBoxSolLockOp(seg_t *pSeg, caddr_t virtAddr, size_t cb, int Attr, int Op, ulong_t *pLockMap, size_t off)
{
    return 0;
}


static int rtR0SegVBoxSolGetProt(seg_t *pSeg, caddr_t virtAddr, size_t cb, uint_t *pafPageAccess)
{
    PSEGVBOX_DATA pData = pSeg->s_data;
    size_t iPage = seg_page(pSeg, virtAddr + cb) - seg_page(pSeg, virtAddr) + 1;
    if (iPage)
    {
        do
        {
            iPage--;
            pafPageAccess[iPage] = pData->fPageAccess;
        } while (iPage);
    }
    return 0;
}


static u_offset_t rtR0SegVBoxSolGetOffset(seg_t *pSeg, caddr_t virtAddr)
{
    return ((uintptr_t)virtAddr - (uintptr_t)pSeg->s_base);
}


static int rtR0SegVBoxSolGetType(seg_t *pSeg, caddr_t virtAddr)
{
    return MAP_SHARED;
}


static int rtR0SegVBoxSolGetVp(seg_t *pSeg, caddr_t virtAddr, vnode_t **ppVnode)
{
    *ppVnode = &s_segVBoxVnode;
    return 0;
}


static int rtR0SegVBoxSolAdvise(seg_t *pSeg, caddr_t virtAddr, size_t cb, uint_t Behav /* wut? */)
{
    return 0;
}


static void rtR0SegVBoxSolDump(seg_t *pSeg)
{
    /* Nothing to do. */
}


static int rtR0SegVBoxSolPageLock(seg_t *pSeg, caddr_t virtAddr, size_t cb, page_t ***pppPage, enum lock_type LockType, enum seg_rw ReadWrite)
{
    return ENOTSUP;
}


static int rtR0SegVBoxSolSetPageSize(seg_t *pSeg, caddr_t virtAddr, size_t cb, uint_t SizeCode)
{
    return ENOTSUP;
}


static int rtR0SegVBoxSolGetMemId(seg_t *pSeg, caddr_t virtAddr, memid_t *pMemId)
{
    return ENODEV;
}


static lgrp_mem_policy_info_t *rtR0SegVBoxSolGetPolicy(seg_t *pSeg, caddr_t virtAddr)
{
    return NULL;
}


static int rtR0SegVBoxSolCapable(seg_t *pSeg, segcapability_t Capab)
{
    return 0;
}


static struct seg_ops s_SegVBoxOps =
{
    rtR0SegVBoxSolDup,
    rtR0SegVBoxSolUnmap,
    rtR0SegVBoxSolFree,
    rtR0SegVBoxSolFault,
    rtR0SegVBoxSolFaultA,
    rtR0SegVBoxSolSetProt,
    rtR0SegVBoxSolCheckProt,
    rtR0SegVBoxSolKluster,
    NULL,                       /* swapout */
    rtR0SegVBoxSolSync,
    rtR0SegVBoxSolInCore,
    rtR0SegVBoxSolLockOp,
    rtR0SegVBoxSolGetProt,
    rtR0SegVBoxSolGetOffset,
    rtR0SegVBoxSolGetType,
    rtR0SegVBoxSolGetVp,
    rtR0SegVBoxSolAdvise,
    rtR0SegVBoxSolDump,
    rtR0SegVBoxSolPageLock,
    rtR0SegVBoxSolSetPageSize,
    rtR0SegVBoxSolGetMemId,
    rtR0SegVBoxSolGetPolicy,
    rtR0SegVBoxSolCapable
};

#endif /* ___r0drv_solaris_memobj_r0drv_solaris_h */