drivers/misc/mediatek/gpu/gpu_rgx/m1.11_5516664/rgxfwload.h

/*************************************************************************/ /*!
@File
@Title          Services RGX OS Interface for loading the firmware
@Copyright      Copyright (c) Imagination Technologies Ltd. All Rights Reserved
@Description    This file defines the OS interface through which the RGX
                device initialisation code in the kernel/server will obtain
                the RGX firmware binary image. The API is used during the
                initialisation of an RGX device via the PVRSRVDeviceInitialise()
                call sequence.
@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
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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
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COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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*/ /**************************************************************************/

#ifndef __RGXFWLOAD_H__
#define __RGXFWLOAD_H__

#include "img_defs.h"
#include "rgxdefs_km.h"
#include "device_connection.h"

#if defined (__cplusplus)
extern "C" {
#endif


/*! Opaque type handle defined and known to the OS layer implementation of this
 * rgxfwload.h OS API. This private data is allocated in the implementation
 * of RGXLoadFirmware() and contains whatever data and information needed to
 * be able to acquire and return the firmware binary image to the Services
 * kernel/server during initialisation.
 * It is no longer required and may be freed when RGXUnloadFirmware()
 * is called.
 */
typedef struct RGXFW RGXFW_t;


/*************************************************************************/ /*!
@Function     RGXLoadFirmware
@Description  The OS implementation must load or acquire the
              firmware (FW) image binary needed by the RGX driver stack.
              A handle to the common layer device node is given
              to identify which device instance in the system is being
              initialised. The BVNC string is also supplied so that the
              implementation knows which FW image to retrieve
              since each FW image only supports one GPU type/revision.
              The calling server code supports multiple GPU types and revisions
              and will detect the specific GPU type and revision before calling
              this API. It will also have runtime configuration of the VZ mode,
              hence this API must be able to retrieve different FW binary images
              based on the pszBVNCString given. The purpose of the end
              platform/system is key to understand which FW images must be
              available to the kernel server.
              On exit the implementation must return a pointer to some private
              data it uses to hold the FW image information and data. It will
              be passed onto later API calls by the kernel server code.
              NULL should be returned if the FW image could not be retrieved.
              The format of the BVNC string is as follows ([x] denotes
              optional field):
                "rgx.fw[.signed].B.V[p].N.C[.vz]"
              The implementation must first try to load the FW identified
              by the pszBVpNCString parameter. If this is not available then it
              should drop back to retrieving the FW identified by the
              pszBVNCString parameter. The fields in the string are:
                B, V, N, C are all unsigned integer identifying type/revision,
                [.signed] is present when RGX_FW_SIGNED=1 is defined in the
                  server build,
                [p] is present for provisional GPU configurations (pre-silicon),
                [.vz] is present when the kernel server is loaded on the HOST
                  of a virtualised platform. See the DriverMode server
                  AppHint for details.

@Input        psDeviceNode    Device instance identifier.
@Input        pszBVNCString   Identifier string of the FW image to
                              be loaded/acquired in production driver.
@Return       RGXFW*          Ptr to private data on success, NULL otherwise.
*/ /**************************************************************************/
struct RGXFW* RGXLoadFirmware(PVRSRV_DEVICE_NODE *psDeviceNode,
                       const IMG_CHAR *pszBVNCString);

/*************************************************************************/ /*!
@Function     RGXFirmwareData
@Description  This function returns a pointer to the start of the FW image
              binary data held in memory. It must remain valid until
              RGXUnloadFirmware() is called.
@Input        psRGXFW  Private data opaque handle
@Return       void*    Ptr to FW binary image to start on GPU.
*/ /**************************************************************************/
const void* RGXFirmwareData(struct RGXFW *psRGXFW);

/*************************************************************************/ /*!
@Function     RGXFirmwareSize
@Description  This function returns the size of the FW image binary data.
@Input        psRGXFW  Private data opaque handle
@Return       size_t   Size in bytes of the firmware binary image
*/ /**************************************************************************/
size_t RGXFirmwareSize(struct RGXFW *psRGXFW);

/*************************************************************************/ /*!
@Function     RGXUnloadFirmware
@Description  This is called when the server has completed firmware
              initialisation and no longer needs the private data, possibly
              allocated by RGXLoadFirmware().
@Input        psRGXFW  Private data opaque handle
*/ /**************************************************************************/
void RGXUnloadFirmware(struct RGXFW *psRGXFW);


#if defined(__cplusplus)
}
#endif


#endif /* __RGXFWLOAD_H__ */

/******************************************************************************
 End of file (rgxfwload.h)
******************************************************************************/