| /**************************************************************************** |
| * |
| * 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 |
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| * 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/dma-buf.h> |
| #include <linux/platform_device.h> |
| |
| #define _GC_OBJ_ZONE gcvZONE_OS |
| |
| /* Descriptor of a dma_buf imported. */ |
| typedef struct _gcsDMABUF |
| { |
| struct dma_buf *dmabuf; |
| struct dma_buf_attachment *attachment; |
| struct sg_table *sgtable; |
| unsigned long *pagearray; |
| int handle; |
| int fd; |
| } |
| gcsDMABUF; |
| |
| static gceSTATUS |
| _DmabufAttach( |
| IN gckALLOCATOR Allocator, |
| IN gcsATTACH_DESC_PTR Desc, |
| IN PLINUX_MDL Mdl |
| ) |
| { |
| gceSTATUS status; |
| |
| gckOS os = Allocator->os; |
| |
| int fd = (int) Desc->handle; |
| |
| struct dma_buf *dmabuf = NULL; |
| struct sg_table *sgt = NULL; |
| struct dma_buf_attachment *attachment = NULL; |
| int npages = 0; |
| unsigned long *pagearray = NULL; |
| int i, j, k = 0; |
| struct scatterlist *s; |
| gcsDMABUF *gcdmabuf = NULL; |
| |
| gcmkHEADER(); |
| |
| gcmkVERIFY_OBJECT(os, gcvOBJ_OS); |
| |
| /* Import dma buf handle. */ |
| dmabuf = dma_buf_get(fd); |
| |
| if (!dmabuf) |
| { |
| gcmkONERROR(gcvSTATUS_NOT_SUPPORTED); |
| } |
| |
| attachment = dma_buf_attach(dmabuf, &os->device->platform->device->dev); |
| |
| if (!attachment) |
| { |
| gcmkONERROR(gcvSTATUS_NOT_SUPPORTED); |
| } |
| |
| sgt = dma_buf_map_attachment(attachment, DMA_BIDIRECTIONAL); |
| |
| if (!sgt) |
| { |
| gcmkONERROR(gcvSTATUS_NOT_SUPPORTED); |
| } |
| |
| /* Prepare page array. */ |
| /* Get number of pages. */ |
| for_each_sg(sgt->sgl, s, sgt->orig_nents, i) |
| { |
| npages += (sg_dma_len(s) + PAGE_SIZE - 1) / PAGE_SIZE; |
| } |
| |
| /* Allocate page arrary. */ |
| gcmkONERROR(gckOS_Allocate(os, npages * gcmSIZEOF(*pagearray), (gctPOINTER *)&pagearray)); |
| |
| /* Fill page arrary. */ |
| for_each_sg(sgt->sgl, s, sgt->orig_nents, i) |
| { |
| for (j = 0; j < (sg_dma_len(s) + PAGE_SIZE - 1) / PAGE_SIZE; j++) |
| { |
| pagearray[k++] = sg_dma_address(s) + j * PAGE_SIZE; |
| } |
| } |
| |
| /* Prepare descriptor. */ |
| gcmkONERROR(gckOS_Allocate(os, sizeof(gcsDMABUF), (gctPOINTER *)&gcdmabuf)); |
| |
| gcdmabuf->fd = fd; |
| gcdmabuf->dmabuf = dmabuf; |
| gcdmabuf->pagearray = pagearray; |
| gcdmabuf->attachment = attachment; |
| gcdmabuf->sgtable = sgt; |
| |
| /* Record page number. */ |
| Mdl->numPages = npages; |
| |
| Mdl->priv = gcdmabuf; |
| |
| gcmkFOOTER_NO(); |
| return gcvSTATUS_OK; |
| |
| OnError: |
| gcmkFOOTER(); |
| return status; |
| } |
| |
| |
| static void |
| _DmabufFree( |
| IN gckALLOCATOR Allocator, |
| IN PLINUX_MDL Mdl |
| ) |
| { |
| gcsDMABUF *gcdmabuf = Mdl->priv; |
| gckOS os = Allocator->os; |
| |
| dma_buf_unmap_attachment(gcdmabuf->attachment, gcdmabuf->sgtable, DMA_BIDIRECTIONAL); |
| |
| dma_buf_detach(gcdmabuf->dmabuf, gcdmabuf->attachment); |
| |
| dma_buf_put(gcdmabuf->dmabuf); |
| |
| gckOS_Free(os, gcdmabuf->pagearray); |
| |
| gckOS_Free(os, gcdmabuf); |
| } |
| |
| static gctINT |
| _DmabufMapUser( |
| IN gckALLOCATOR Allocator, |
| IN PLINUX_MDL Mdl, |
| IN PLINUX_MDL_MAP MdlMap, |
| IN gctBOOL Cacheable |
| ) |
| { |
| gcsDMABUF *gcdmabuf = Mdl->priv; |
| gceSTATUS status; |
| PLINUX_MDL mdl = Mdl; |
| PLINUX_MDL_MAP mdlMap = MdlMap; |
| struct file * file = gcdmabuf->dmabuf->file; |
| |
| mdlMap->vmaAddr = (gctSTRING)vm_mmap(file, |
| 0L, |
| mdl->numPages * PAGE_SIZE, |
| PROT_READ | PROT_WRITE, |
| MAP_SHARED, |
| 0); |
| |
| if (IS_ERR(mdlMap->vmaAddr)) |
| { |
| gcmkONERROR(gcvSTATUS_OUT_OF_RESOURCES); |
| } |
| |
| down_write(¤t->mm->mmap_sem); |
| |
| mdlMap->vma = find_vma(current->mm, (unsigned long)mdlMap->vmaAddr); |
| |
| up_write(¤t->mm->mmap_sem); |
| |
| if (mdlMap->vma == gcvNULL) |
| { |
| gcmkONERROR(gcvSTATUS_OUT_OF_RESOURCES); |
| } |
| |
| return 0; |
| |
| OnError: |
| return status; |
| } |
| |
| static void |
| _DmabufUnmapUser( |
| IN gckALLOCATOR Allocator, |
| IN gctPOINTER Logical, |
| IN gctUINT32 Size |
| ) |
| { |
| if (unlikely(current->mm == gcvNULL)) |
| { |
| /* Do nothing if process is exiting. */ |
| return; |
| } |
| |
| vm_munmap((unsigned long)Logical, Size); |
| } |
| |
| static gceSTATUS |
| _DmabufMapKernel( |
| IN gckALLOCATOR Allocator, |
| IN PLINUX_MDL Mdl, |
| OUT gctPOINTER *Logical |
| ) |
| { |
| /* Kernel doesn't acess video memory. */ |
| return gcvSTATUS_NOT_SUPPORTED; |
| |
| } |
| |
| static gceSTATUS |
| _DmabufUnmapKernel( |
| IN gckALLOCATOR Allocator, |
| IN PLINUX_MDL Mdl, |
| IN gctPOINTER Logical |
| ) |
| { |
| /* Kernel doesn't acess video memory. */ |
| return gcvSTATUS_NOT_SUPPORTED; |
| } |
| |
| static gceSTATUS |
| _DmabufLogicalToPhysical( |
| IN gckALLOCATOR Allocator, |
| IN PLINUX_MDL Mdl, |
| IN gctPOINTER Logical, |
| IN gctUINT32 ProcessID, |
| OUT gctPHYS_ADDR_T * Physical |
| ) |
| { |
| return gcvSTATUS_NOT_SUPPORTED; |
| } |
| |
| |
| static gceSTATUS |
| _DmabufCache( |
| IN gckALLOCATOR Allocator, |
| IN PLINUX_MDL Mdl, |
| IN gctPOINTER Logical, |
| IN gctUINT32 Physical, |
| IN gctUINT32 Bytes, |
| IN gceCACHEOPERATION Operation |
| ) |
| { |
| return gcvSTATUS_OK; |
| } |
| |
| |
| static gceSTATUS |
| _DmabufPhysical( |
| IN gckALLOCATOR Allocator, |
| IN PLINUX_MDL Mdl, |
| IN gctUINT32 Offset, |
| OUT gctPHYS_ADDR_T * Physical |
| ) |
| { |
| gcsDMABUF *gcdmabuf = Mdl->priv; |
| |
| *Physical = gcdmabuf->pagearray[Offset]; |
| |
| |
| return gcvSTATUS_OK; |
| } |
| |
| /* Default allocator operations. */ |
| static gcsALLOCATOR_OPERATIONS DmabufAllocatorOperations = |
| { |
| .Attach = _DmabufAttach, |
| .Free = _DmabufFree, |
| .MapUser = _DmabufMapUser, |
| .UnmapUser = _DmabufUnmapUser, |
| .MapKernel = _DmabufMapKernel, |
| .UnmapKernel = _DmabufUnmapKernel, |
| .LogicalToPhysical = _DmabufLogicalToPhysical, |
| .Cache = _DmabufCache, |
| .Physical = _DmabufPhysical, |
| }; |
| |
| /* Default allocator entry. */ |
| gceSTATUS |
| _DmabufAlloctorInit( |
| IN gckOS Os, |
| OUT gckALLOCATOR * Allocator |
| ) |
| { |
| gceSTATUS status; |
| gckALLOCATOR allocator; |
| |
| gcmkONERROR( |
| gckALLOCATOR_Construct(Os, &DmabufAllocatorOperations, &allocator)); |
| |
| allocator->capability = gcvALLOC_FLAG_DMABUF; |
| |
| *Allocator = allocator; |
| |
| return gcvSTATUS_OK; |
| |
| OnError: |
| return status; |
| } |
| |