virtgpu.cpp File Reference

#include <aurora.h>
#include <aucon.h>
#include <Drivers/uart.h>
#include <pcie.h>
#include <Drivers/virtio.h>
#include <Mm/vmmngr.h>
#include <Mm/pmmngr.h>
#include <Mm/kmalloc.h>
#include <Hal/AA64/aa64lowlevel.h>
#include <string.h>
#include "virtiogpu.h"
#include "virtscreen.h"
#include <Hal/AA64/gic.h>
#include <Fs/vfs.h>
#include <Fs/Dev/devfs.h>
#include "cmd2d.h"

Include dependency graph for virtgpu.cpp:

Macros
#define	VIRTIO_PCI_CAP_ID   0x09
#define	VIRTIO_PCI_CAP_COMMON_CFG   1
#define	VIRTIO_PCI_CAP_DEVICE_CFG   4
#define	VIRTIO_STATUS_ACKNOWLEDGE   1
#define	VIRTIO_STATUS_DRIVER   2
#define	VIRTIO_STATUS_DRIVER_OK   4
#define	VIRTIO_STATUS_FEATURES_OK   8
#define	VIRTIO_GPU_F_VIRGL   (1ULL << 0)
#define	VIRTIO_GPU_F_EDID   (1ULL << 1)
#define	VIRTIO_GPU_F_RESOURCE_UUID   (1ULL << 2)
#define	VIRTIO_GPU_F_RESOURCE_BLOB   (1ULL << 3)
#define	VIRTIO_GPU_F_CONTEXT_INIT   (1ULL << 4)
#define	VIRTQ_DESC_F_NEXT   1
#define	VIRTQ_DESC_F_WRITE   2

Functions
AU_EXTERN AU_EXPORT int	AuDriverUnload ()
void	gpu_reset_device (VirtioCommonCfg *cfg)
	gpu_reset_device – reset the virtio gpu device
void	gpu_feature_negotiate (VirtioCommonCfg *cfg)
	gpu_feature_negotiate – check available features of host device and enable only those supported by the driver
bool	gpu_is_virgl_supported ()
	gpu_is_virgl_supported – returns if virgl is supported by host
bool	gpu_is_edid_supported ()
	gpu_is_edid_supported – returns if edid blob is supported by host
void	gpu_initialize_controlq (VirtioCommonCfg *cfg)
void	gpu_initialize_cursorq (VirtioCommonCfg *cfg)
	gpu_initialize_cursorq – initialize the cursor queue
void	gpu_notify_queue (VirtioCommonCfg *cfg, uint16_t queueIdx)
	gpu_notify_queue – notify host that new command is present
void	gpu_execute_command (VirtioCommonCfg *cfg, void *cmd, size_t len)
	gpu_execute_command – submit a command to gpu
void	gpu_attach_back_cmd (VirtioCommonCfg *cfg, void *req, uint32_t len1, void *req2, uint32_t len2)
	gpu_attach_back_cmd – attach backing stroe command needs two descriptor previous gpu_execute_command won't satisfy this
int	gpu_allocate_resource_id ()
	gpu_allocate_resource_id – allocates resource for commands
void	gpu_virt_interrupt (int spinum)
	Virtio-keyboard interrupt handler.
int	virtio_gpu_iocontrol (AuVFSNode *file, int code, void *arg)
	virtio_gpu_iocontrol – io control for virtio gpu
AU_EXTERN AU_EXPORT int	AuDriverMain ()
VirtioCommonCfg *	gpu_get_config_pointer ()
	gpu_get_config_pointer – return the pointer virtio common config descriptor from pcie

Variables
AuVFSNode *	fsnode

Detailed Description

BSD 2-Clause License

Copyright (c) 2022-2023, Manas Kamal Choudhury All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Macro Definition Documentation

VIRTIO_GPU_F_CONTEXT_INIT

#define VIRTIO_GPU_F_CONTEXT_INIT   (1ULL << 4)

VIRTIO_GPU_F_EDID

#define VIRTIO_GPU_F_EDID   (1ULL << 1)

VIRTIO_GPU_F_RESOURCE_BLOB

#define VIRTIO_GPU_F_RESOURCE_BLOB   (1ULL << 3)

VIRTIO_GPU_F_RESOURCE_UUID

#define VIRTIO_GPU_F_RESOURCE_UUID   (1ULL << 2)

VIRTIO_GPU_F_VIRGL

#define VIRTIO_GPU_F_VIRGL   (1ULL << 0)

feature bits

VIRTIO_PCI_CAP_COMMON_CFG

#define VIRTIO_PCI_CAP_COMMON_CFG   1

VIRTIO_PCI_CAP_DEVICE_CFG

#define VIRTIO_PCI_CAP_DEVICE_CFG   4

VIRTIO_PCI_CAP_ID

#define VIRTIO_PCI_CAP_ID   0x09

VIRTIO_STATUS_ACKNOWLEDGE

#define VIRTIO_STATUS_ACKNOWLEDGE   1

VIRTIO_STATUS_DRIVER

#define VIRTIO_STATUS_DRIVER   2

VIRTIO_STATUS_DRIVER_OK

#define VIRTIO_STATUS_DRIVER_OK   4

VIRTIO_STATUS_FEATURES_OK

#define VIRTIO_STATUS_FEATURES_OK   8

VIRTQ_DESC_F_NEXT

#define VIRTQ_DESC_F_NEXT   1

VIRTQ_DESC_F_WRITE

#define VIRTQ_DESC_F_WRITE   2

Function Documentation

AuDriverMain()

AU_EXTERN AU_EXPORT int AuDriverMain

(

)

reset the device first

negotiate features

initialize both queues

initialize the screen data and start scanout 0

AuDriverUnload()

AU_EXTERN AU_EXPORT int AuDriverUnload

(

)

gpu_allocate_resource_id()

int gpu_allocate_resource_id

(

)

gpu_allocate_resource_id – allocates resource for commands

Returns

newly allocated resource id

gpu_attach_back_cmd()

void gpu_attach_back_cmd	(	VirtioCommonCfg *	cfg,
		void *	req,
		uint32_t	len1,
		void *	req2,
		uint32_t	len2
	)

gpu_attach_back_cmd – attach backing stroe command needs two descriptor previous gpu_execute_command won't satisfy this

Parameters

cfg	– pointer to virtio common config
req	– pointer to request command one
len1	– request command one length
req2	– pointer to request command two
len2	– request command two length

gpu_execute_command()

void gpu_execute_command	(	VirtioCommonCfg *	cfg,
		void *	cmd,
		size_t	len
	)

gpu_execute_command – submit a command to gpu

Parameters

cfg	– pointer to virtio common config
cmd	– Pointer to command struct
len	– total length of the command

gpu_feature_negotiate()

void gpu_feature_negotiate

(

VirtioCommonCfg *

cfg

)

gpu_feature_negotiate – check available features of host device and enable only those supported by the driver

Parameters

cfg	– pointer to virtio common config

examine the supported feature step by step

gpu_get_config_pointer()

VirtioCommonCfg * gpu_get_config_pointer

(

)

gpu_get_config_pointer – return the pointer virtio common config descriptor from pcie

Returns

system config descriptor from pcie config space

gpu_initialize_controlq()

void gpu_initialize_controlq

(

VirtioCommonCfg *

cfg

)

gpu_initialize_controlq – initialize the control queue

Parameters

cfg	- Pointer to virtio common config

gpu_initialize_cursorq()

void gpu_initialize_cursorq

(

VirtioCommonCfg *

cfg

)

gpu_initialize_cursorq – initialize the cursor queue

Parameters

cfg	– Pointer to virtio common config

gpu_is_edid_supported()

bool gpu_is_edid_supported

(

)

gpu_is_edid_supported – returns if edid blob is supported by host

Returns

true if supported, false if not supported

gpu_is_virgl_supported()

bool gpu_is_virgl_supported

(

)

gpu_is_virgl_supported – returns if virgl is supported by host

Returns

true if supported, false if not supported

gpu_notify_queue()

void gpu_notify_queue	(	VirtioCommonCfg *	cfg,
		uint16_t	queueIdx
	)

gpu_notify_queue – notify host that new command is present

Parameters

queueIdx

– queue number, zero for controlq and one for cursorq

gpu_reset_device()

void gpu_reset_device

(

VirtioCommonCfg *

cfg

)

gpu_reset_device – reset the virtio gpu device

Parameters

cfg	– pointer to virtio common config

gpu_virt_interrupt()

void gpu_virt_interrupt

(

int

spinum

)

Virtio-keyboard interrupt handler.

shoud read the status register

but skipping it for now

virtio_gpu_iocontrol()

int virtio_gpu_iocontrol	(	AuVFSNode *	file,
		int	code,
		void *	arg
	)

virtio_gpu_iocontrol – io control for virtio gpu

Parameters

file	– Pointer to gpu file struct
code	– code number
arg	– data struct passed to this driver

Variable Documentation

fsnode

AuVFSNode* fsnode