mirror of
https://github.com/thead-yocto-mirror/gpu_bxm_4_64-kernel
synced 2026-07-19 14:44:50 +02:00
117 lines
6.0 KiB
C
117 lines
6.0 KiB
C
/*************************************************************************/ /*!
|
|
@File
|
|
@Title OS Interface for mapping PMRs into CPU space.
|
|
@Copyright Copyright (c) Imagination Technologies Ltd. All Rights Reserved
|
|
@Description OS abstraction for the mmap2 interface for mapping PMRs into
|
|
User Mode memory
|
|
@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 OSMMAP_H
|
|
#define OSMMAP_H
|
|
|
|
#include <powervr/mem_types.h>
|
|
|
|
#include "img_types.h"
|
|
#include "pvrsrv_error.h"
|
|
#include "pvrsrv_memallocflags.h"
|
|
|
|
/*************************************************************************/ /*!
|
|
@Function OSMMapPMR
|
|
@Description Maps the specified PMR into CPU memory so that it may be
|
|
accessed by the user process.
|
|
Whether the memory is mapped read only, read/write, or not at
|
|
all, is dependent on the PMR itself.
|
|
The PMR handle is opaque to the user, and lower levels of this
|
|
stack ensure that the handle is private to this process, such
|
|
that this API cannot be abused to gain access to other people's
|
|
PMRs. The OS implementation of this function should return the
|
|
virtual address and length for the User to use. The "PrivData"
|
|
is to be stored opaquely by the caller (N.B. he should make no
|
|
assumptions, in particular, NULL is a valid handle) and given
|
|
back to the call to OSMUnmapPMR.
|
|
The OS implementation is free to use the PrivData handle for
|
|
any purpose it sees fit.
|
|
@Input hBridge The bridge handle.
|
|
@Input hPMR The handle of the PMR to be mapped.
|
|
@Input uiPMRLength The size of the PMR.
|
|
@Input uiFlags Flags indicating how the mapping should
|
|
be done (read-only, etc). These may not
|
|
be honoured if the PMR does not permit
|
|
them.
|
|
@Input uiPMRLength The size of the PMR.
|
|
@Output phOSMMapPrivDataOut Returned private data.
|
|
@Output ppvMappingAddressOut The returned mapping.
|
|
@Output puiMappingLengthOut The size of the returned mapping.
|
|
@Return PVRSRV_OK on success, failure code otherwise.
|
|
*/ /*************************************************************************/
|
|
PVRSRV_ERROR
|
|
OSMMapPMR(IMG_HANDLE hBridge,
|
|
IMG_HANDLE hPMR,
|
|
IMG_DEVMEM_SIZE_T uiPMRLength,
|
|
PVRSRV_MEMALLOCFLAGS_T uiFlags,
|
|
IMG_HANDLE *phOSMMapPrivDataOut,
|
|
void **ppvMappingAddressOut,
|
|
size_t *puiMappingLengthOut);
|
|
|
|
/*************************************************************************/ /*!
|
|
@Function OSMUnmapPMR
|
|
@Description Unmaps the specified PMR from CPU memory.
|
|
This function is the counterpart to OSMMapPMR.
|
|
The caller is required to pass the PMR handle back in along
|
|
with the same 3-tuple of information that was returned by the
|
|
call to OSMMapPMR in phOSMMapPrivDataOut.
|
|
It is possible to unmap only part of the original mapping
|
|
with this call, by specifying only the address range to be
|
|
unmapped in pvMappingAddress and uiMappingLength.
|
|
@Input hBridge The bridge handle.
|
|
@Input hPMR The handle of the PMR to be unmapped.
|
|
@Input hOSMMapPrivData The OS private data of the mapping.
|
|
@Input pvMappingAddress The address to be unmapped.
|
|
@Input uiMappingLength The size to be unmapped.
|
|
@Return PVRSRV_OK on success, failure code otherwise.
|
|
*/ /*************************************************************************/
|
|
void
|
|
OSMUnmapPMR(IMG_HANDLE hBridge,
|
|
IMG_HANDLE hPMR,
|
|
IMG_HANDLE hOSMMapPrivData,
|
|
void *pvMappingAddress,
|
|
size_t uiMappingLength);
|
|
|
|
#endif /* OSMMAP_H */
|