| 1 | /* $Id: alloc-r0drv-solaris.c 106061 2024-09-16 14:03:52Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Memory Allocation, Ring-0 Driver, Solaris.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2024 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | #include "the-solaris-kernel.h"
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| 42 | #include "internal/iprt.h"
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| 43 | #include <iprt/mem.h>
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| 44 |
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| 45 | #include <iprt/assert.h>
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| 46 | #include <iprt/errcore.h>
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| 47 | #include <iprt/log.h>
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| 48 | #include <iprt/param.h>
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| 49 | #include <iprt/thread.h>
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| 50 | #include "r0drv/alloc-r0drv.h"
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| 51 |
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| 52 |
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| 53 | /*********************************************************************************************************************************
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| 54 | * Structures and Typedefs *
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| 55 | *********************************************************************************************************************************/
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| 56 | static ddi_dma_attr_t s_rtR0SolDmaAttr =
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| 57 | {
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| 58 | DMA_ATTR_V0, /* Version Number */
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| 59 | (uint64_t)0, /* Lower limit */
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| 60 | (uint64_t)0, /* High limit */
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| 61 | (uint64_t)0xffffffff, /* Counter limit */
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| 62 | (uint64_t)PAGESIZE, /* Alignment */
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| 63 | (uint64_t)PAGESIZE, /* Burst size */
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| 64 | (uint64_t)PAGESIZE, /* Effective DMA size */
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| 65 | (uint64_t)0xffffffff, /* Max DMA xfer size */
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| 66 | (uint64_t)0xffffffff, /* Segment boundary */
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| 67 | 1, /* Scatter-gather list length (1 for contiguous) */
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| 68 | 1, /* Device granularity */
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| 69 | 0 /* Bus-specific flags */
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| 70 | };
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| 71 |
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| 72 | extern void *contig_alloc(size_t cb, ddi_dma_attr_t *pDmaAttr, size_t uAlign, int fCanSleep);
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| 73 |
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| 74 |
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| 75 | /**
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| 76 | * OS specific allocation function.
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| 77 | */
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| 78 | DECLHIDDEN(int) rtR0MemAllocEx(size_t cb, uint32_t fFlags, PRTMEMHDR *ppHdr)
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| 79 | {
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| 80 | size_t cbAllocated = cb;
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| 81 | PRTMEMHDR pHdr;
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| 82 | unsigned fKmFlags = fFlags & RTMEMHDR_FLAG_ANY_CTX_ALLOC ? KM_NOSLEEP : KM_SLEEP;
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| 83 | if (fFlags & RTMEMHDR_FLAG_ZEROED)
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| 84 | pHdr = (PRTMEMHDR)kmem_zalloc(cb + sizeof(*pHdr), fKmFlags);
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| 85 | else
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| 86 | pHdr = (PRTMEMHDR)kmem_alloc(cb + sizeof(*pHdr), fKmFlags);
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| 87 | if (RT_UNLIKELY(!pHdr))
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| 88 | {
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| 89 | LogRel(("rtMemAllocEx(%u, %#x) failed\n", (unsigned)cb + sizeof(*pHdr), fFlags));
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| 90 | return VERR_NO_MEMORY;
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| 91 | }
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| 92 |
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| 93 | pHdr->u32Magic = RTMEMHDR_MAGIC;
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| 94 | pHdr->fFlags = fFlags;
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| 95 | pHdr->cb = cbAllocated;
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| 96 | pHdr->cbReq = cb;
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| 97 |
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| 98 | *ppHdr = pHdr;
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| 99 | return VINF_SUCCESS;
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| 100 | }
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| 101 |
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| 102 |
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| 103 | /**
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| 104 | * OS specific free function.
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| 105 | */
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| 106 | DECLHIDDEN(void) rtR0MemFree(PRTMEMHDR pHdr)
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| 107 | {
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| 108 | pHdr->u32Magic += 1;
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| 109 | kmem_free(pHdr, pHdr->cb + sizeof(*pHdr));
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| 110 | }
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| 111 |
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| 112 |
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| 113 | /**
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| 114 | * Allocates physical memory which satisfy the given constraints.
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| 115 | *
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| 116 | * @param uPhysHi The upper physical address limit (inclusive).
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| 117 | * @param puPhys Where to store the physical address of the allocated
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| 118 | * memory. Optional, can be NULL.
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| 119 | * @param cb Size of allocation.
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| 120 | * @param uAlignment Alignment.
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| 121 | * @param fContig Whether the memory must be physically contiguous or
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| 122 | * not.
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| 123 | * @returns Virtual address of allocated memory block or NULL if allocation
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| 124 | * failed.
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| 125 | */
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| 126 | DECLHIDDEN(void *) rtR0SolMemAlloc(uint64_t uPhysHi, uint64_t *puPhys, size_t cb, uint64_t uAlignment, bool fContig)
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| 127 | {
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| 128 | if ((cb & PAGEOFFSET) != 0)
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| 129 | return NULL;
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| 130 |
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| 131 | size_t cPages = (cb + PAGESIZE - 1) >> PAGESHIFT;
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| 132 | if (!cPages)
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| 133 | return NULL;
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| 134 |
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| 135 | ddi_dma_attr_t DmaAttr = s_rtR0SolDmaAttr;
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| 136 | DmaAttr.dma_attr_addr_hi = uPhysHi;
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| 137 | DmaAttr.dma_attr_align = uAlignment;
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| 138 | if (!fContig)
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| 139 | DmaAttr.dma_attr_sgllen = cPages > INT_MAX ? INT_MAX - 1 : cPages;
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| 140 | else
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| 141 | AssertRelease(DmaAttr.dma_attr_sgllen == 1);
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| 142 |
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| 143 | void *pvMem = contig_alloc(cb, &DmaAttr, PAGESIZE, 1 /* can sleep */);
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| 144 | if (!pvMem)
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| 145 | {
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| 146 | LogRel(("rtR0SolMemAlloc failed. cb=%u Align=%u fContig=%d\n", (unsigned)cb, (unsigned)uAlignment, fContig));
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| 147 | return NULL;
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| 148 | }
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| 149 |
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| 150 | pfn_t PageFrameNum = hat_getpfnum(kas.a_hat, (caddr_t)pvMem);
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| 151 | AssertRelease(PageFrameNum != PFN_INVALID);
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| 152 | if (puPhys)
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| 153 | *puPhys = (uint64_t)PageFrameNum << PAGESHIFT;
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| 154 |
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| 155 | return pvMem;
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| 156 | }
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| 157 |
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| 158 |
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| 159 | /**
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| 160 | * Frees memory allocated using rtR0SolMemAlloc().
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| 161 | *
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| 162 | * @param pv The memory to free.
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| 163 | * @param cb Size of the memory block
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| 164 | */
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| 165 | DECLHIDDEN(void) rtR0SolMemFree(void *pv, size_t cb)
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| 166 | {
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| 167 | if (RT_LIKELY(pv))
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| 168 | g_pfnrtR0Sol_contig_free(pv, cb);
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| 169 | }
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| 170 |
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| 171 |
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| 172 | RTR0DECL(void *) RTMemContAlloc(PRTCCPHYS pPhys, size_t cb)
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| 173 | {
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| 174 | AssertPtrReturn(pPhys, NULL);
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| 175 | AssertReturn(cb > 0, NULL);
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| 176 | RT_ASSERT_PREEMPTIBLE();
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| 177 |
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| 178 | /* Allocate physically contiguous (< 4GB) page-aligned memory. */
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| 179 | uint64_t uPhys;
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| 180 | void *pvMem = rtR0SolMemAlloc((uint64_t)_4G - 1, &uPhys, cb, PAGESIZE, true /* fContig */);
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| 181 | if (RT_UNLIKELY(!pvMem))
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| 182 | {
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| 183 | LogRel(("RTMemContAlloc failed to allocate %u bytes\n", cb));
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| 184 | return NULL;
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| 185 | }
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| 186 |
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| 187 | Assert(uPhys < _4G);
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| 188 | *pPhys = uPhys;
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| 189 | return pvMem;
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| 190 | }
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| 191 |
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| 192 |
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| 193 | RTR0DECL(void) RTMemContFree(void *pv, size_t cb)
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| 194 | {
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| 195 | RT_ASSERT_PREEMPTIBLE();
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| 196 | rtR0SolMemFree(pv, cb);
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| 197 | }
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| 198 |
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