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/* $Id: alloc-r0drv-solaris.c $ */
/** @file
* IPRT - Memory Allocation, Ring-0 Driver, Solaris.
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox 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.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "the-solaris-kernel.h"
#include "internal/iprt.h"
#include <iprt/mem.h>
#include <iprt/assert.h>
#include <iprt/errcore.h>
#include <iprt/log.h>
#include <iprt/param.h>
#include <iprt/thread.h>
#include "r0drv/alloc-r0drv.h"
/*********************************************************************************************************************************
* Structures and Typedefs *
*********************************************************************************************************************************/
static ddi_dma_attr_t s_rtR0SolDmaAttr =
{
DMA_ATTR_V0, /* Version Number */
(uint64_t)0, /* Lower limit */
(uint64_t)0, /* High limit */
(uint64_t)0xffffffff, /* Counter limit */
(uint64_t)PAGESIZE, /* Alignment */
(uint64_t)PAGESIZE, /* Burst size */
(uint64_t)PAGESIZE, /* Effective DMA size */
(uint64_t)0xffffffff, /* Max DMA xfer size */
(uint64_t)0xffffffff, /* Segment boundary */
1, /* Scatter-gather list length (1 for contiguous) */
1, /* Device granularity */
0 /* Bus-specific flags */
};
extern void *contig_alloc(size_t cb, ddi_dma_attr_t *pDmaAttr, size_t uAlign, int fCanSleep);
/**
* OS specific allocation function.
*/
DECLHIDDEN(int) rtR0MemAllocEx(size_t cb, uint32_t fFlags, PRTMEMHDR *ppHdr)
{
size_t cbAllocated = cb;
PRTMEMHDR pHdr;
unsigned fKmFlags = fFlags & RTMEMHDR_FLAG_ANY_CTX_ALLOC ? KM_NOSLEEP : KM_SLEEP;
if (fFlags & RTMEMHDR_FLAG_ZEROED)
pHdr = (PRTMEMHDR)kmem_zalloc(cb + sizeof(*pHdr), fKmFlags);
else
pHdr = (PRTMEMHDR)kmem_alloc(cb + sizeof(*pHdr), fKmFlags);
if (RT_UNLIKELY(!pHdr))
{
LogRel(("rtMemAllocEx(%u, %#x) failed\n", (unsigned)cb + sizeof(*pHdr), fFlags));
return VERR_NO_MEMORY;
}
pHdr->u32Magic = RTMEMHDR_MAGIC;
pHdr->fFlags = fFlags;
pHdr->cb = cbAllocated;
pHdr->cbReq = cb;
*ppHdr = pHdr;
return VINF_SUCCESS;
}
/**
* OS specific free function.
*/
DECLHIDDEN(void) rtR0MemFree(PRTMEMHDR pHdr)
{
pHdr->u32Magic += 1;
kmem_free(pHdr, pHdr->cb + sizeof(*pHdr));
}
/**
* Allocates physical memory which satisfy the given constraints.
*
* @param uPhysHi The upper physical address limit (inclusive).
* @param puPhys Where to store the physical address of the allocated
* memory. Optional, can be NULL.
* @param cb Size of allocation.
* @param uAlignment Alignment.
* @param fContig Whether the memory must be physically contiguous or
* not.
* @returns Virtual address of allocated memory block or NULL if allocation
* failed.
*/
DECLHIDDEN(void *) rtR0SolMemAlloc(uint64_t uPhysHi, uint64_t *puPhys, size_t cb, uint64_t uAlignment, bool fContig)
{
if ((cb & PAGEOFFSET) != 0)
return NULL;
size_t cPages = (cb + PAGESIZE - 1) >> PAGESHIFT;
if (!cPages)
return NULL;
ddi_dma_attr_t DmaAttr = s_rtR0SolDmaAttr;
DmaAttr.dma_attr_addr_hi = uPhysHi;
DmaAttr.dma_attr_align = uAlignment;
if (!fContig)
DmaAttr.dma_attr_sgllen = cPages > INT_MAX ? INT_MAX - 1 : cPages;
else
AssertRelease(DmaAttr.dma_attr_sgllen == 1);
void *pvMem = contig_alloc(cb, &DmaAttr, PAGESIZE, 1 /* can sleep */);
if (!pvMem)
{
LogRel(("rtR0SolMemAlloc failed. cb=%u Align=%u fContig=%d\n", (unsigned)cb, (unsigned)uAlignment, fContig));
return NULL;
}
pfn_t PageFrameNum = hat_getpfnum(kas.a_hat, (caddr_t)pvMem);
AssertRelease(PageFrameNum != PFN_INVALID);
if (puPhys)
*puPhys = (uint64_t)PageFrameNum << PAGESHIFT;
return pvMem;
}
/**
* Frees memory allocated using rtR0SolMemAlloc().
*
* @param pv The memory to free.
* @param cb Size of the memory block
*/
DECLHIDDEN(void) rtR0SolMemFree(void *pv, size_t cb)
{
if (RT_LIKELY(pv))
g_pfnrtR0Sol_contig_free(pv, cb);
}
RTR0DECL(void *) RTMemContAlloc(PRTCCPHYS pPhys, size_t cb)
{
AssertPtrReturn(pPhys, NULL);
AssertReturn(cb > 0, NULL);
RT_ASSERT_PREEMPTIBLE();
/* Allocate physically contiguous (< 4GB) page-aligned memory. */
uint64_t uPhys;
void *pvMem = rtR0SolMemAlloc((uint64_t)_4G - 1, &uPhys, cb, PAGESIZE, true /* fContig */);
if (RT_UNLIKELY(!pvMem))
{
LogRel(("RTMemContAlloc failed to allocate %u bytes\n", cb));
return NULL;
}
Assert(uPhys < _4G);
*pPhys = uPhys;
return pvMem;
}
RTR0DECL(void) RTMemContFree(void *pv, size_t cb)
{
RT_ASSERT_PREEMPTIBLE();
rtR0SolMemFree(pv, cb);
}
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