| /*************************************************************************/ /*! |
| @File dma_support.h |
| @Title Device contiguous memory allocator and I/O re-mapper |
| @Copyright Copyright (c) Imagination Technologies Ltd. All Rights Reserved |
| @Description This header provides a contiguous memory allocator API; mainly |
| used for allocating / ioremapping (DMA/PA <-> CPU/VA) |
| @License Dual MIT/GPLv2 |
| |
| The contents of this file are subject to the MIT license as set out below. |
| |
| 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. |
| |
| Alternatively, the contents of this file may be used under the terms of |
| the GNU General Public License Version 2 ("GPL") in which case the provisions |
| of GPL are applicable instead of those above. |
| |
| If you wish to allow use of your version of this file only under the terms of |
| GPL, and not to allow others to use your version of this file under the terms |
| of the MIT license, indicate your decision by deleting the provisions above |
| and replace them with the notice and other provisions required by GPL as set |
| out in the file called "GPL-COPYING" included in this distribution. If you do |
| not delete the provisions above, a recipient may use your version of this file |
| under the terms of either the MIT license or GPL. |
| |
| This License is also included in this distribution in the file called |
| "MIT-COPYING". |
| |
| EXCEPT AS OTHERWISE STATED IN A NEGOTIATED AGREEMENT: (A) 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; AND (B) 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. |
| */ /**************************************************************************/ |
| |
| #ifndef _DMA_SUPPORT_H_ |
| #define _DMA_SUPPORT_H_ |
| |
| #include "osfunc.h" |
| #include "pvrsrv.h" |
| |
| typedef struct _DMA_ALLOC_ |
| { |
| IMG_UINT64 ui64Size; |
| IMG_CPU_VIRTADDR pvVirtAddr; |
| IMG_DEV_PHYADDR sBusAddr; |
| void *pvOSDevice; |
| } DMA_ALLOC; |
| |
| /*! |
| ****************************************************************************** |
| @Function SysDmaAllocMem |
| |
| @Description Allocates physically contiguous memory |
| |
| @Return PVRSRV_ERROR PVRSRV_OK on success. Otherwise, a PVRSRV_ |
| error code |
| ******************************************************************************/ |
| PVRSRV_ERROR SysDmaAllocMem(DMA_ALLOC *psDmaAlloc); |
| |
| /*! |
| ****************************************************************************** |
| @Function SysDmaFreeMem |
| |
| @Description Free physically contiguous memory |
| |
| @Return void |
| ******************************************************************************/ |
| void SysDmaFreeMem(DMA_ALLOC *psCmaAlloc); |
| |
| /*! |
| ****************************************************************************** |
| @Function SysDmaRegisterForIoRemapping |
| |
| @Description Registers DMA_ALLOC for manual I/O remapping |
| |
| @Return PVRSRV_ERROR PVRSRV_OK on success. Otherwise, a PVRSRV_ |
| error code |
| ******************************************************************************/ |
| PVRSRV_ERROR SysDmaRegisterForIoRemapping(DMA_ALLOC *psPhysHeapDmaAlloc); |
| |
| /*! |
| ****************************************************************************** |
| @Function SysDmaDeregisterForIoRemapping |
| |
| @Description Deregisters DMA_ALLOC from manual I/O remapping |
| |
| @Return void |
| ******************************************************************************/ |
| void SysDmaDeregisterForIoRemapping(DMA_ALLOC *psPhysHeapDmaAlloc); |
| |
| /*! |
| ****************************************************************************** |
| @Function SysDmaDevPAddrToCpuVAddr |
| |
| @Description Maps a DMA_ALLOC physical address to CPU virtual address |
| |
| @Return IMG_CPU_VIRTADDR on success. Otherwise, a NULL |
| ******************************************************************************/ |
| IMG_CPU_VIRTADDR SysDmaDevPAddrToCpuVAddr(IMG_UINT64 uiAddr, IMG_UINT64 ui64Size); |
| |
| /*! |
| ****************************************************************************** |
| @Function SysDmaCpuVAddrToDevPAddr |
| |
| @Description Maps a DMA_ALLOC CPU virtual address to physical address |
| |
| @Return Non-zero value on success. Otherwise, a 0 |
| ******************************************************************************/ |
| IMG_UINT64 SysDmaCpuVAddrToDevPAddr(IMG_CPU_VIRTADDR pvDMAVirtAddr); |
| |
| #endif /* _DMA_SUPPORT_H_ */ |
| |
| /***************************************************************************** |
| End of file (dma_support.h) |
| *****************************************************************************/ |