606 lines
16 KiB
C
606 lines
16 KiB
C
/****************************************************************************
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2014 - 2019 Vivante Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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*****************************************************************************
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*
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* The GPL License (GPL)
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*
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* Copyright (C) 2014 - 2019 Vivante Corporation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*****************************************************************************
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*
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* Note: This software is released under dual MIT and GPL licenses. A
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* recipient may use this file under the terms of either the MIT license or
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* GPL License. If you wish to use only one license not the other, you can
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* indicate your decision by deleting one of the above license notices in your
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* version of this file.
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*
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*****************************************************************************/
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#include "gc_hal_kernel_linux.h"
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#include "gc_hal_kernel_allocator.h"
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#include <linux/pagemap.h>
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#include <linux/seq_file.h>
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#include <linux/mman.h>
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#include <asm/atomic.h>
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#include <linux/dma-mapping.h>
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0)
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#include <linux/dma-direct.h>
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#endif
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#define _GC_OBJ_ZONE gcvZONE_OS
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typedef struct _gcsDMA_PRIV * gcsDMA_PRIV_PTR;
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typedef struct _gcsDMA_PRIV {
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atomic_t usage;
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}
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gcsDMA_PRIV;
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struct mdl_dma_priv {
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gctPOINTER kvaddr;
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dma_addr_t dmaHandle;
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};
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/*
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* Debugfs support.
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*/
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static int gc_dma_usage_show(struct seq_file* m, void* data)
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{
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gcsINFO_NODE *node = m->private;
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gckALLOCATOR Allocator = node->device;
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gcsDMA_PRIV_PTR priv = Allocator->privateData;
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long long usage = (long long)atomic_read(&priv->usage);
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seq_printf(m, "type n pages bytes\n");
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seq_printf(m, "normal %10llu %12llu\n", usage, usage * PAGE_SIZE);
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return 0;
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}
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static gcsINFO InfoList[] =
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{
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{"dmausage", gc_dma_usage_show},
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};
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static void
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_DebugfsInit(
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IN gckALLOCATOR Allocator,
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IN gckDEBUGFS_DIR Root
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)
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{
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gcmkVERIFY_OK(
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gckDEBUGFS_DIR_Init(&Allocator->debugfsDir, Root->root, "dma"));
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gcmkVERIFY_OK(gckDEBUGFS_DIR_CreateFiles(
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&Allocator->debugfsDir,
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InfoList,
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gcmCOUNTOF(InfoList),
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Allocator
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));
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}
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static void
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_DebugfsCleanup(
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IN gckALLOCATOR Allocator
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)
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{
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gcmkVERIFY_OK(gckDEBUGFS_DIR_RemoveFiles(
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&Allocator->debugfsDir,
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InfoList,
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gcmCOUNTOF(InfoList)
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));
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gckDEBUGFS_DIR_Deinit(&Allocator->debugfsDir);
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}
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static gceSTATUS
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_DmaAlloc(
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IN gckALLOCATOR Allocator,
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INOUT PLINUX_MDL Mdl,
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IN gctSIZE_T NumPages,
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IN gctUINT32 Flags
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)
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{
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gceSTATUS status;
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u32 gfp = GFP_KERNEL | gcdNOWARN;
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gcsDMA_PRIV_PTR allocatorPriv = (gcsDMA_PRIV_PTR)Allocator->privateData;
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struct mdl_dma_priv *mdlPriv=gcvNULL;
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gckOS os = Allocator->os;
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gcmkHEADER_ARG("Mdl=%p NumPages=0x%zx Flags=0x%x", Mdl, NumPages, Flags);
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gcmkONERROR(gckOS_Allocate(os, sizeof(struct mdl_dma_priv), (gctPOINTER *)&mdlPriv));
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mdlPriv->kvaddr = gcvNULL;
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#if defined(CONFIG_ZONE_DMA32) && LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)
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if (Flags & gcvALLOC_FLAG_4GB_ADDR)
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{
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gfp |= __GFP_DMA32;
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}
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#endif
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mdlPriv->kvaddr
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#if defined CONFIG_MIPS || defined CONFIG_CPU_CSKYV2 || defined CONFIG_PPC || defined CONFIG_ARM64
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= dma_alloc_coherent(galcore_device, NumPages * PAGE_SIZE, &mdlPriv->dmaHandle, gfp);
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#else
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= dma_alloc_writecombine(galcore_device, NumPages * PAGE_SIZE, &mdlPriv->dmaHandle, gfp);
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#endif
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#ifdef CONFLICT_BETWEEN_BASE_AND_PHYS
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if ((os->device->baseAddress & 0x80000000) != (mdlPriv->dmaHandle & 0x80000000))
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{
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mdlPriv->dmaHandle = (mdlPriv->dmaHandle & ~0x80000000)
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| (os->device->baseAddress & 0x80000000);
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}
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#endif
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if (mdlPriv->kvaddr == gcvNULL)
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{
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gcmkONERROR(gcvSTATUS_OUT_OF_MEMORY);
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}
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Mdl->priv = mdlPriv;
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Mdl->dmaHandle = mdlPriv->dmaHandle;
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/* Statistic. */
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atomic_add(NumPages, &allocatorPriv->usage);
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gcmkFOOTER_NO();
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return gcvSTATUS_OK;
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OnError:
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if (mdlPriv)
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{
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gckOS_Free(os, mdlPriv);
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}
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gcmkFOOTER();
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return status;
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}
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static gceSTATUS
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_DmaGetSGT(
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IN gckALLOCATOR Allocator,
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IN PLINUX_MDL Mdl,
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IN gctSIZE_T Offset,
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IN gctSIZE_T Bytes,
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OUT gctPOINTER *SGT
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)
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{
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0)
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struct page ** pages = gcvNULL;
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struct page * page = gcvNULL;
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struct sg_table *sgt = NULL;
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struct mdl_dma_priv *mdlPriv = (struct mdl_dma_priv*)Mdl->priv;
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gceSTATUS status = gcvSTATUS_OK;
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gctSIZE_T offset = Offset & ~PAGE_MASK; /* Offset to the first page */
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gctSIZE_T skipPages = Offset >> PAGE_SHIFT; /* skipped pages */
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gctSIZE_T numPages = (PAGE_ALIGN(Offset + Bytes) >> PAGE_SHIFT) - skipPages;
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gctSIZE_T i;
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gcmkASSERT(Offset + Bytes <= Mdl->numPages << PAGE_SHIFT);
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sgt = kmalloc(sizeof(struct sg_table), GFP_KERNEL | gcdNOWARN);
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if (!sgt)
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{
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gcmkONERROR(gcvSTATUS_OUT_OF_MEMORY);
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}
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pages = kmalloc(sizeof(struct page*) * numPages, GFP_KERNEL | gcdNOWARN);
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if (!pages)
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{
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gcmkONERROR(gcvSTATUS_OUT_OF_MEMORY);
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}
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#if !defined(phys_to_page)
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page = virt_to_page(mdlPriv->kvaddr);
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#elif LINUX_VERSION_CODE < KERNEL_VERSION(3,13,0)
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page = phys_to_page(mdlPriv->dmaHandle);
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#else
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page = phys_to_page(dma_to_phys(&Allocator->os->device->platform->device->dev, mdlPriv->dmaHandle));
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#endif
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for (i = 0; i < numPages; ++i)
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{
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pages[i] = nth_page(page, i + skipPages);
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}
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if (sg_alloc_table_from_pages(sgt, pages, numPages, offset, Bytes, GFP_KERNEL) < 0)
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{
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gcmkONERROR(gcvSTATUS_GENERIC_IO);
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}
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*SGT = (gctPOINTER)sgt;
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OnError:
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if (pages)
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{
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kfree(pages);
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}
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if (gcmIS_ERROR(status) && sgt)
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{
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kfree(sgt);
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}
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return status;
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#else
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return gcvSTATUS_NOT_SUPPORTED;
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#endif
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}
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static void
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_DmaFree(
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IN gckALLOCATOR Allocator,
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IN OUT PLINUX_MDL Mdl
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)
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{
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gckOS os = Allocator->os;
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struct mdl_dma_priv *mdlPriv=(struct mdl_dma_priv *)Mdl->priv;
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gcsDMA_PRIV_PTR allocatorPriv = (gcsDMA_PRIV_PTR)Allocator->privateData;
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#if defined CONFIG_MIPS || defined CONFIG_CPU_CSKYV2 || defined CONFIG_PPC || defined CONFIG_ARM64
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dma_free_coherent(galcore_device, Mdl->numPages * PAGE_SIZE, mdlPriv->kvaddr, mdlPriv->dmaHandle);
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#else
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dma_free_writecombine(galcore_device, Mdl->numPages * PAGE_SIZE, mdlPriv->kvaddr, mdlPriv->dmaHandle);
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#endif
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gckOS_Free(os, mdlPriv);
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/* Statistic. */
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atomic_sub(Mdl->numPages, &allocatorPriv->usage);
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}
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static gceSTATUS
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_DmaMmap(
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IN gckALLOCATOR Allocator,
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IN PLINUX_MDL Mdl,
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IN gctBOOL Cacheable,
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IN gctSIZE_T skipPages,
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IN gctSIZE_T numPages,
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IN struct vm_area_struct *vma
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)
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{
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struct mdl_dma_priv *mdlPriv = (struct mdl_dma_priv*)Mdl->priv;
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gceSTATUS status = gcvSTATUS_OK;
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gcmkHEADER_ARG("Allocator=%p Mdl=%p vma=%p", Allocator, Mdl, vma);
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gcmkASSERT(skipPages + numPages <= Mdl->numPages);
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/* map kernel memory to user space.. */
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#if defined CONFIG_MIPS || defined CONFIG_CPU_CSKYV2 || defined CONFIG_PPC
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if (remap_pfn_range(
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vma,
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vma->vm_start,
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(mdlPriv->dmaHandle >> PAGE_SHIFT) + skipPages,
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numPages << PAGE_SHIFT,
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pgprot_writecombine(vma->vm_page_prot)) < 0)
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#else
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/* map kernel memory to user space.. */
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if (dma_mmap_writecombine(galcore_device,
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vma,
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(gctINT8_PTR)mdlPriv->kvaddr + (skipPages << PAGE_SHIFT),
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mdlPriv->dmaHandle + (skipPages << PAGE_SHIFT),
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numPages << PAGE_SHIFT) < 0)
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#endif
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{
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gcmkTRACE_ZONE(
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gcvLEVEL_WARNING, gcvZONE_OS,
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"%s(%d): dma_mmap_attrs error",
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__FUNCTION__, __LINE__
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);
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status = gcvSTATUS_OUT_OF_MEMORY;
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}
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gcmkFOOTER();
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return status;
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}
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static void
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_DmaUnmapUser(
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IN gckALLOCATOR Allocator,
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IN PLINUX_MDL Mdl,
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IN PLINUX_MDL_MAP MdlMap,
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IN gctUINT32 Size
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)
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{
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if (unlikely(current->mm == gcvNULL))
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{
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/* Do nothing if process is exiting. */
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return;
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}
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0)
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if (vm_munmap((unsigned long)MdlMap->vmaAddr, Size) < 0)
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{
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gcmkTRACE_ZONE(
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gcvLEVEL_WARNING, gcvZONE_OS,
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"%s(%d): vm_munmap failed",
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__FUNCTION__, __LINE__
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);
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}
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#else
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down_write(¤t->mm->mmap_sem);
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if (do_munmap(current->mm, (unsigned long)MdlMap->vmaAddr, Size) < 0)
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{
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gcmkTRACE_ZONE(
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gcvLEVEL_WARNING, gcvZONE_OS,
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"%s(%d): do_munmap failed",
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__FUNCTION__, __LINE__
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);
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}
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up_write(¤t->mm->mmap_sem);
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#endif
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}
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static gceSTATUS
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_DmaMapUser(
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gckALLOCATOR Allocator,
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PLINUX_MDL Mdl,
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PLINUX_MDL_MAP MdlMap,
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gctBOOL Cacheable
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)
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{
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gctPOINTER userLogical = gcvNULL;
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gceSTATUS status = gcvSTATUS_OK;
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gcmkHEADER_ARG("Allocator=%p Mdl=%p Cacheable=%d", Allocator, Mdl, Cacheable);
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0)
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userLogical = (gctPOINTER)vm_mmap(gcvNULL,
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0L,
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Mdl->numPages * PAGE_SIZE,
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PROT_READ | PROT_WRITE,
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MAP_SHARED | MAP_NORESERVE,
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0);
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#else
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down_write(¤t->mm->mmap_sem);
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userLogical = (gctPOINTER)do_mmap_pgoff(gcvNULL,
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0L,
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Mdl->numPages * PAGE_SIZE,
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PROT_READ | PROT_WRITE,
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MAP_SHARED,
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0);
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up_write(¤t->mm->mmap_sem);
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#endif
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gcmkTRACE_ZONE(
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gcvLEVEL_INFO, gcvZONE_OS,
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"%s(%d): vmaAddr->%p for phys_addr->%p",
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__FUNCTION__, __LINE__, userLogical, Mdl
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);
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if (IS_ERR(userLogical))
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{
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gcmkTRACE_ZONE(
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gcvLEVEL_INFO, gcvZONE_OS,
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"%s(%d): do_mmap_pgoff error",
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__FUNCTION__, __LINE__
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);
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gcmkONERROR(gcvSTATUS_OUT_OF_MEMORY);
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}
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down_write(¤t->mm->mmap_sem);
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do
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{
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struct vm_area_struct *vma = find_vma(current->mm, (unsigned long)userLogical);
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if (vma == gcvNULL)
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{
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gcmkTRACE_ZONE(
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gcvLEVEL_INFO, gcvZONE_OS,
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"%s(%d): find_vma error",
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__FUNCTION__, __LINE__
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);
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gcmkERR_BREAK(gcvSTATUS_OUT_OF_RESOURCES);
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}
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gcmkERR_BREAK(_DmaMmap(Allocator, Mdl, Cacheable, 0, Mdl->numPages, vma));
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MdlMap->vmaAddr = userLogical;
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MdlMap->cacheable = gcvFALSE;
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MdlMap->vma = vma;
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}
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while (gcvFALSE);
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up_write(¤t->mm->mmap_sem);
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OnError:
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if (gcmIS_ERROR(status) && userLogical)
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{
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_DmaUnmapUser(Allocator, Mdl, userLogical, Mdl->numPages * PAGE_SIZE);
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}
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gcmkFOOTER();
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return status;
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}
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static gceSTATUS
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_DmaMapKernel(
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IN gckALLOCATOR Allocator,
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IN PLINUX_MDL Mdl,
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IN gctSIZE_T Offset,
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IN gctSIZE_T Bytes,
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OUT gctPOINTER *Logical
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)
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{
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struct mdl_dma_priv *mdlPriv=(struct mdl_dma_priv *)Mdl->priv;
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*Logical = (uint8_t *)mdlPriv->kvaddr + Offset;
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return gcvSTATUS_OK;
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}
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static gceSTATUS
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_DmaUnmapKernel(
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IN gckALLOCATOR Allocator,
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IN PLINUX_MDL Mdl,
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IN gctPOINTER Logical
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)
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{
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return gcvSTATUS_OK;
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}
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static gceSTATUS
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_DmaCache(
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IN gckALLOCATOR Allocator,
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IN PLINUX_MDL Mdl,
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IN gctSIZE_T Offset,
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IN gctPOINTER Logical,
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IN gctSIZE_T Bytes,
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IN gceCACHEOPERATION Operation
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)
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{
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switch (Operation)
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{
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case gcvCACHE_CLEAN:
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case gcvCACHE_FLUSH:
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_MemoryBarrier();
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break;
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case gcvCACHE_INVALIDATE:
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break;
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default:
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return gcvSTATUS_INVALID_ARGUMENT;
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}
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return gcvSTATUS_OK;
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}
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static gceSTATUS
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_DmaPhysical(
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IN gckALLOCATOR Allocator,
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IN PLINUX_MDL Mdl,
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IN gctUINT32 Offset,
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OUT gctPHYS_ADDR_T * Physical
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)
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{
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struct mdl_dma_priv *mdlPriv=(struct mdl_dma_priv *)Mdl->priv;
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*Physical = mdlPriv->dmaHandle + Offset;
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return gcvSTATUS_OK;
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}
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static void
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|
_DmaAllocatorDestructor(
|
|
gcsALLOCATOR *Allocator
|
|
)
|
|
{
|
|
_DebugfsCleanup(Allocator);
|
|
|
|
if (Allocator->privateData)
|
|
{
|
|
kfree(Allocator->privateData);
|
|
}
|
|
|
|
kfree(Allocator);
|
|
}
|
|
|
|
/* Default allocator operations. */
|
|
gcsALLOCATOR_OPERATIONS DmaAllocatorOperations = {
|
|
.Alloc = _DmaAlloc,
|
|
.Free = _DmaFree,
|
|
.Mmap = _DmaMmap,
|
|
.MapUser = _DmaMapUser,
|
|
.UnmapUser = _DmaUnmapUser,
|
|
.MapKernel = _DmaMapKernel,
|
|
.UnmapKernel = _DmaUnmapKernel,
|
|
.Cache = _DmaCache,
|
|
.Physical = _DmaPhysical,
|
|
.GetSGT = _DmaGetSGT,
|
|
};
|
|
|
|
/* Default allocator entry. */
|
|
gceSTATUS
|
|
_DmaAlloctorInit(
|
|
IN gckOS Os,
|
|
IN gcsDEBUGFS_DIR *Parent,
|
|
OUT gckALLOCATOR * Allocator
|
|
)
|
|
{
|
|
gceSTATUS status;
|
|
gckALLOCATOR allocator = gcvNULL;
|
|
gcsDMA_PRIV_PTR priv = gcvNULL;
|
|
|
|
gcmkONERROR(gckALLOCATOR_Construct(Os, &DmaAllocatorOperations, &allocator));
|
|
|
|
priv = kzalloc(gcmSIZEOF(gcsDMA_PRIV), GFP_KERNEL | gcdNOWARN);
|
|
|
|
if (!priv)
|
|
{
|
|
gcmkONERROR(gcvSTATUS_OUT_OF_MEMORY);
|
|
}
|
|
|
|
atomic_set(&priv->usage, 0);
|
|
|
|
/* Register private data. */
|
|
allocator->privateData = priv;
|
|
allocator->destructor = _DmaAllocatorDestructor;
|
|
|
|
_DebugfsInit(allocator, Parent);
|
|
|
|
/*
|
|
* DMA allocator is only used for NonPaged memory
|
|
* when NO_DMA_COHERENT is not defined.
|
|
*/
|
|
allocator->capability = gcvALLOC_FLAG_CONTIGUOUS
|
|
| gcvALLOC_FLAG_DMABUF_EXPORTABLE
|
|
#if defined(CONFIG_ZONE_DMA32) && LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)
|
|
| gcvALLOC_FLAG_4GB_ADDR
|
|
#endif
|
|
;
|
|
|
|
*Allocator = allocator;
|
|
|
|
return gcvSTATUS_OK;
|
|
|
|
OnError:
|
|
if (allocator)
|
|
{
|
|
kfree(allocator);
|
|
}
|
|
return status;
|
|
}
|
|
|