| /**************************************************************************** |
| * |
| * The MIT License (MIT) |
| * |
| * Copyright (c) 2014 - 2016 Vivante Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| * DEALINGS IN THE SOFTWARE. |
| * |
| ***************************************************************************** |
| * |
| * The GPL License (GPL) |
| * |
| * Copyright (C) 2014 - 2016 Vivante Corporation |
| * |
| * 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; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * 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, write to the Free Software Foundation, |
| * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| * |
| ***************************************************************************** |
| * |
| * Note: This software is released under dual MIT and GPL licenses. A |
| * recipient may use this file under the terms of either the MIT license or |
| * GPL License. If you wish to use only one license not the other, you can |
| * indicate your decision by deleting one of the above license notices in your |
| * version of this file. |
| * |
| *****************************************************************************/ |
| |
| |
| #include "gc_hal_kernel_linux.h" |
| #include "gc_hal_kernel_allocator.h" |
| |
| #include <linux/pagemap.h> |
| #include <linux/seq_file.h> |
| #include <linux/mman.h> |
| #include <asm/atomic.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/slab.h> |
| #include <linux/dma-mapping.h> |
| |
| #define _GC_OBJ_ZONE gcvZONE_OS |
| |
| typedef struct _gcsCMA_PRIV * gcsCMA_PRIV_PTR; |
| typedef struct _gcsCMA_PRIV { |
| gctUINT32 cmasize; |
| } |
| gcsCMA_PRIV; |
| |
| struct mdl_cma_priv { |
| gctPOINTER kvaddr; |
| dma_addr_t physical; |
| }; |
| |
| int gc_cma_usage_show(struct seq_file* m, void* data) |
| { |
| gcsINFO_NODE *node = m->private; |
| gckALLOCATOR Allocator = node->device; |
| gcsCMA_PRIV_PTR priv = Allocator->privateData; |
| |
| seq_printf(m, "cma: %u bytes\n", priv->cmasize); |
| |
| return 0; |
| } |
| |
| static gcsINFO InfoList[] = |
| { |
| {"cmausage", gc_cma_usage_show}, |
| }; |
| |
| static void |
| _DefaultAllocatorDebugfsInit( |
| IN gckALLOCATOR Allocator, |
| IN gckDEBUGFS_DIR Root |
| ) |
| { |
| gcmkVERIFY_OK( |
| gckDEBUGFS_DIR_Init(&Allocator->debugfsDir, Root->root, "cma")); |
| |
| gcmkVERIFY_OK(gckDEBUGFS_DIR_CreateFiles( |
| &Allocator->debugfsDir, |
| InfoList, |
| gcmCOUNTOF(InfoList), |
| Allocator |
| )); |
| } |
| |
| static void |
| _DefaultAllocatorDebugfsCleanup( |
| IN gckALLOCATOR Allocator |
| ) |
| { |
| gcmkVERIFY_OK(gckDEBUGFS_DIR_RemoveFiles( |
| &Allocator->debugfsDir, |
| InfoList, |
| gcmCOUNTOF(InfoList) |
| )); |
| |
| gckDEBUGFS_DIR_Deinit(&Allocator->debugfsDir); |
| } |
| |
| static gceSTATUS |
| _CMAFSLAlloc( |
| IN gckALLOCATOR Allocator, |
| INOUT PLINUX_MDL Mdl, |
| IN gctSIZE_T NumPages, |
| IN gctUINT32 Flags |
| ) |
| { |
| gceSTATUS status; |
| gcsCMA_PRIV_PTR priv = (gcsCMA_PRIV_PTR)Allocator->privateData; |
| |
| struct mdl_cma_priv *mdl_priv=gcvNULL; |
| gckOS os = Allocator->os; |
| |
| gcmkHEADER_ARG("Mdl=%p NumPages=%d", Mdl, NumPages); |
| |
| gcmkONERROR(gckOS_Allocate(os, sizeof(struct mdl_cma_priv), (gctPOINTER *)&mdl_priv)); |
| mdl_priv->kvaddr = gcvNULL; |
| |
| mdl_priv->kvaddr = dma_alloc_writecombine(gcvNULL, |
| NumPages * PAGE_SIZE, |
| &mdl_priv->physical, |
| GFP_KERNEL | gcdNOWARN); |
| |
| if (mdl_priv->kvaddr == gcvNULL) |
| { |
| gcmkONERROR(gcvSTATUS_OUT_OF_MEMORY); |
| } |
| |
| Mdl->priv = mdl_priv; |
| priv->cmasize += NumPages * PAGE_SIZE; |
| |
| gcmkFOOTER_NO(); |
| return gcvSTATUS_OK; |
| |
| OnError: |
| if(mdl_priv) |
| gckOS_Free(os, mdl_priv); |
| gcmkFOOTER(); |
| return status; |
| } |
| |
| static void |
| _CMAFSLFree( |
| IN gckALLOCATOR Allocator, |
| IN OUT PLINUX_MDL Mdl |
| ) |
| { |
| gckOS os = Allocator->os; |
| struct mdl_cma_priv *mdl_priv=(struct mdl_cma_priv *)Mdl->priv; |
| gcsCMA_PRIV_PTR priv = (gcsCMA_PRIV_PTR)Allocator->privateData; |
| dma_free_writecombine(gcvNULL, |
| Mdl->numPages * PAGE_SIZE, |
| mdl_priv->kvaddr, |
| mdl_priv->physical); |
| gckOS_Free(os, mdl_priv); |
| priv->cmasize -= Mdl->numPages * PAGE_SIZE; |
| } |
| |
| gctINT |
| _CMAFSLMapUser( |
| gckALLOCATOR Allocator, |
| PLINUX_MDL Mdl, |
| PLINUX_MDL_MAP MdlMap, |
| gctBOOL Cacheable |
| ) |
| { |
| |
| PLINUX_MDL mdl = Mdl; |
| PLINUX_MDL_MAP mdlMap = MdlMap; |
| struct mdl_cma_priv *mdl_priv=(struct mdl_cma_priv *)Mdl->priv; |
| |
| gcmkHEADER_ARG("Allocator=%p Mdl=%p MdlMap=%p gctBOOL=%d", Allocator, Mdl, MdlMap, Cacheable); |
| |
| #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0) |
| mdlMap->vmaAddr = (gctSTRING)vm_mmap(gcvNULL, |
| 0L, |
| mdl->numPages * PAGE_SIZE, |
| PROT_READ | PROT_WRITE, |
| MAP_SHARED, |
| 0); |
| #else |
| down_write(¤t->mm->mmap_sem); |
| |
| mdlMap->vmaAddr = (gctSTRING)do_mmap_pgoff(gcvNULL, |
| 0L, |
| mdl->numPages * PAGE_SIZE, |
| PROT_READ | PROT_WRITE, |
| MAP_SHARED, |
| 0); |
| |
| up_write(¤t->mm->mmap_sem); |
| #endif |
| |
| gcmkTRACE_ZONE( |
| gcvLEVEL_INFO, gcvZONE_OS, |
| "%s(%d): vmaAddr->0x%X for phys_addr->0x%X", |
| __FUNCTION__, __LINE__, |
| (gctUINT32)(gctUINTPTR_T)mdlMap->vmaAddr, |
| (gctUINT32)(gctUINTPTR_T)mdl |
| ); |
| |
| if (IS_ERR(mdlMap->vmaAddr)) |
| { |
| gcmkTRACE_ZONE( |
| gcvLEVEL_INFO, gcvZONE_OS, |
| "%s(%d): do_mmap_pgoff error", |
| __FUNCTION__, __LINE__ |
| ); |
| |
| mdlMap->vmaAddr = gcvNULL; |
| |
| gcmkFOOTER_ARG("*status=%d", gcvSTATUS_OUT_OF_MEMORY); |
| return gcvSTATUS_OUT_OF_MEMORY; |
| } |
| |
| down_write(¤t->mm->mmap_sem); |
| |
| mdlMap->vma = find_vma(current->mm, (unsigned long)mdlMap->vmaAddr); |
| |
| if (mdlMap->vma == gcvNULL) |
| { |
| up_write(¤t->mm->mmap_sem); |
| |
| gcmkTRACE_ZONE( |
| gcvLEVEL_INFO, gcvZONE_OS, |
| "%s(%d): find_vma error", |
| __FUNCTION__, __LINE__ |
| ); |
| |
| mdlMap->vmaAddr = gcvNULL; |
| |
| gcmkFOOTER_ARG("*status=%d", gcvSTATUS_OUT_OF_RESOURCES); |
| return gcvSTATUS_OUT_OF_RESOURCES; |
| } |
| |
| /* Now map all the vmalloc pages to this user address. */ |
| if (mdl->contiguous) |
| { |
| /* map kernel memory to user space.. */ |
| if (dma_mmap_writecombine(gcvNULL, |
| mdlMap->vma, |
| mdl_priv->kvaddr, |
| mdl_priv->physical, |
| mdl->numPages * PAGE_SIZE) < 0) |
| { |
| up_write(¤t->mm->mmap_sem); |
| |
| gcmkTRACE_ZONE( |
| gcvLEVEL_WARNING, gcvZONE_OS, |
| "%s(%d): dma_mmap_attrs error", |
| __FUNCTION__, __LINE__ |
| ); |
| |
| mdlMap->vmaAddr = gcvNULL; |
| |
| gcmkFOOTER_ARG("*status=%d", gcvSTATUS_OUT_OF_MEMORY); |
| return gcvSTATUS_OUT_OF_MEMORY; |
| } |
| } |
| else |
| { |
| gckOS_Print("incorrect mdl:conti%d\n",mdl->contiguous); |
| } |
| |
| up_write(¤t->mm->mmap_sem); |
| |
| gcmkFOOTER_NO(); |
| return gcvSTATUS_OK; |
| } |
| |
| void |
| _CMAUnmapUser( |
| IN gckALLOCATOR Allocator, |
| IN gctPOINTER Logical, |
| IN gctUINT32 Size |
| ) |
| { |
| if (unlikely(current->mm == gcvNULL)) |
| { |
| /* Do nothing if process is exiting. */ |
| return; |
| } |
| |
| #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0) |
| if (vm_munmap((unsigned long)Logical, Size) < 0) |
| { |
| gcmkTRACE_ZONE( |
| gcvLEVEL_WARNING, gcvZONE_OS, |
| "%s(%d): vm_munmap failed", |
| __FUNCTION__, __LINE__ |
| ); |
| } |
| #else |
| down_write(¤t->mm->mmap_sem); |
| if (do_munmap(current->mm, (unsigned long)Logical, Size) < 0) |
| { |
| gcmkTRACE_ZONE( |
| gcvLEVEL_WARNING, gcvZONE_OS, |
| "%s(%d): do_munmap failed", |
| __FUNCTION__, __LINE__ |
| ); |
| } |
| up_write(¤t->mm->mmap_sem); |
| #endif |
| } |
| |
| gceSTATUS |
| _CMAMapKernel( |
| IN gckALLOCATOR Allocator, |
| IN PLINUX_MDL Mdl, |
| OUT gctPOINTER *Logical |
| ) |
| { |
| struct mdl_cma_priv *mdl_priv=(struct mdl_cma_priv *)Mdl->priv; |
| *Logical =mdl_priv->kvaddr; |
| return gcvSTATUS_OK; |
| } |
| |
| gceSTATUS |
| _CMAUnmapKernel( |
| IN gckALLOCATOR Allocator, |
| IN PLINUX_MDL Mdl, |
| IN gctPOINTER Logical |
| ) |
| { |
| return gcvSTATUS_OK; |
| } |
| |
| extern gceSTATUS |
| _DefaultLogicalToPhysical( |
| IN gckALLOCATOR Allocator, |
| IN PLINUX_MDL Mdl, |
| IN gctPOINTER Logical, |
| IN gctUINT32 ProcessID, |
| OUT gctPHYS_ADDR_T * Physical |
| ); |
| |
| extern gceSTATUS |
| _DefaultCache( |
| IN gckALLOCATOR Allocator, |
| IN PLINUX_MDL Mdl, |
| IN gctPOINTER Logical, |
| IN gctUINT32 Physical, |
| IN gctUINT32 Bytes, |
| IN gceCACHEOPERATION Operation |
| ); |
| |
| gceSTATUS |
| _CMAPhysical( |
| IN gckALLOCATOR Allocator, |
| IN PLINUX_MDL Mdl, |
| IN gctUINT32 Offset, |
| OUT gctPHYS_ADDR_T * Physical |
| ) |
| { |
| struct mdl_cma_priv *mdl_priv=(struct mdl_cma_priv *)Mdl->priv; |
| |
| *Physical = mdl_priv->physical + Offset * PAGE_SIZE; |
| |
| return gcvSTATUS_OK; |
| } |
| |
| |
| extern void |
| _DefaultAllocatorDestructor( |
| IN void* PrivateData |
| ); |
| |
| /* Default allocator operations. */ |
| gcsALLOCATOR_OPERATIONS CMAFSLAllocatorOperations = { |
| .Alloc = _CMAFSLAlloc, |
| .Free = _CMAFSLFree, |
| .MapUser = _CMAFSLMapUser, |
| .UnmapUser = _CMAUnmapUser, |
| .MapKernel = _CMAMapKernel, |
| .UnmapKernel = _CMAUnmapKernel, |
| .LogicalToPhysical = _DefaultLogicalToPhysical, |
| .Cache = _DefaultCache, |
| .Physical = _CMAPhysical, |
| }; |
| |
| /* Default allocator entry. */ |
| gceSTATUS |
| _CMAFSLAlloctorInit( |
| IN gckOS Os, |
| OUT gckALLOCATOR * Allocator |
| ) |
| { |
| gceSTATUS status; |
| gckALLOCATOR allocator; |
| gcsCMA_PRIV_PTR priv = gcvNULL; |
| |
| gcmkONERROR( |
| gckALLOCATOR_Construct(Os, &CMAFSLAllocatorOperations, &allocator)); |
| |
| priv = kzalloc(gcmSIZEOF(gcsCMA_PRIV), GFP_KERNEL | gcdNOWARN); |
| |
| if (!priv) |
| { |
| gcmkONERROR(gcvSTATUS_OUT_OF_MEMORY); |
| } |
| |
| /* Register private data. */ |
| allocator->privateData = priv; |
| allocator->privateDataDestructor = _DefaultAllocatorDestructor; |
| |
| allocator->debugfsInit = _DefaultAllocatorDebugfsInit; |
| allocator->debugfsCleanup = _DefaultAllocatorDebugfsCleanup; |
| |
| allocator->capability = gcvALLOC_FLAG_CONTIGUOUS; |
| |
| *Allocator = allocator; |
| |
| return gcvSTATUS_OK; |
| |
| OnError: |
| return status; |
| } |
| |
