107 lines
2.5 KiB
C
107 lines
2.5 KiB
C
/*
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* Copyright 2007-2012 Haiku, Inc. All rights reserved.
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* Distributed under the terms of the MIT license.
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*
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* Authors:
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* Gerald Zajac
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*/
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#ifndef DRIVERINTERFACE_H
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#define DRIVERINTERFACE_H
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#include <Accelerant.h>
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#include <GraphicsDefs.h>
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#include <Drivers.h>
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#include <edid.h>
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// This file contains info that is shared between the kernel driver and the
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// accelerant, and info that is shared among the source files of the
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// accelerant.
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#define ENABLE_DEBUG_TRACE // if defined, turns on debug output to syslog
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struct Benaphore {
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sem_id sem;
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int32 count;
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status_t Init(const char* name)
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{
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count = 0;
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sem = create_sem(0, name);
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return sem < 0 ? sem : B_OK;
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}
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status_t Acquire()
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{
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if (atomic_add(&count, 1) > 0)
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return acquire_sem(sem);
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return B_OK;
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}
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status_t Release()
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{
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if (atomic_add(&count, -1) > 1)
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return release_sem(sem);
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return B_OK;
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}
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void Delete() { delete_sem(sem); }
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};
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enum {
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INTEL_GET_SHARED_DATA = B_DEVICE_OP_CODES_END + 234,
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INTEL_DEVICE_NAME,
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INTEL_GET_EDID,
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};
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struct DisplayModeEx : display_mode {
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uint8 bitsPerPixel;
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uint8 bytesPerPixel;
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uint16 bytesPerRow; // number of bytes in one line/row
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};
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struct SharedInfo {
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// Device ID info.
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uint16 vendorID; // PCI vendor ID, from pci_info
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uint16 deviceID; // PCI device ID, from pci_info
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uint8 revision; // PCI device revsion, from pci_info
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char chipName[32]; // user recognizable name of chip
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bool bAccelerantInUse; // true = accelerant has been initialized
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// Memory mappings.
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area_id regsArea; // area_id for the memory mapped registers. It
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// will be cloned into accelerant address space.
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area_id videoMemArea; // addr shared with all teams.
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addr_t videoMemAddr; // virtual video memory addr
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phys_addr_t videoMemPCI; // physical video memory addr
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uint32 videoMemSize; // video memory size in bytes (for frame buffer)
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uint32 maxFrameBufferSize; // max available video memory for frame buffer
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// Color spaces supported by current video chip/driver.
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color_space colorSpaces[6];
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uint32 colorSpaceCount; // number of color spaces in array colorSpaces
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// List of screen modes.
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area_id modeArea; // area containing list of display modes
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uint32 modeCount; // number of display modes in the list
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DisplayModeEx displayMode; // current display mode configuration
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edid1_info edidInfo;
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bool bHaveEDID; // true = EDID info from device is in edidInfo
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Benaphore engineLock; // serializing access to the acceleration engine
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};
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#endif // DRIVERINTERFACE_H
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