drivers/gpu/drm/img-rogue/pvr_drm.c

/* -*- mode: c; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* vi: set ts=8 sw=8 sts=8: */
/*************************************************************************/ /*!
@File
@Title          PowerVR DRM driver
@Codingstyle    LinuxKernel
@Copyright      Copyright (c) Imagination Technologies Ltd. All Rights Reserved
@License        Dual MIT/GPLv2

The contents of this file are subject to the MIT license as set out below.

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of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
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*/ /**************************************************************************/

#include <drm/drm.h>
#include <drm/drmP.h> /* include before drm_crtc.h for kernels older than 3.9 */
#include <drm/drm_crtc.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/version.h>

#include "module_common.h"
#include "pvr_drm.h"
#include "pvr_drv.h"
#include "pvrversion.h"
#include "services_kernel_client.h"

#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 12, 0))
#define DRIVER_RENDER 0
#define DRM_RENDER_ALLOW 0
#endif

#define PVR_DRM_DRIVER_NAME PVR_DRM_NAME
#define PVR_DRM_DRIVER_DESC "Imagination Technologies PVR DRM"
#define	PVR_DRM_DRIVER_DATE "20110701"


static int pvr_pm_suspend(struct device *dev)
{
	struct drm_device *ddev = dev_get_drvdata(dev);

	DRM_DEBUG_DRIVER("device %p\n", dev);

	return PVRSRVCommonDeviceSuspend(ddev->dev_private);
}

static int pvr_pm_resume(struct device *dev)
{
	struct drm_device *ddev = dev_get_drvdata(dev);

	DRM_DEBUG_DRIVER("device %p\n", dev);

	return PVRSRVCommonDeviceResume(ddev->dev_private);
}

const struct dev_pm_ops pvr_pm_ops = {
	.suspend = pvr_pm_suspend,
	.resume = pvr_pm_resume,
};


static int pvr_drm_load(struct drm_device *ddev, unsigned long flags)
{
	struct _PVRSRV_DEVICE_NODE_ *dev_node;
	enum PVRSRV_ERROR srv_err;
	int err;

	DRM_DEBUG_DRIVER("device %p\n", ddev->dev);

	/*
	 * The equivalent is done for PCI modesetting drivers by
	 * drm_get_pci_dev()
	 */
	if (ddev->platformdev)
		platform_set_drvdata(ddev->platformdev, ddev);

	srv_err = PVRSRVDeviceCreate(ddev->dev, &dev_node);
	if (srv_err != PVRSRV_OK) {
		DRM_ERROR("failed to create device node for device %p (%s)\n",
			  ddev->dev, PVRSRVGetErrorStringKM(srv_err));
		if (srv_err == PVRSRV_ERROR_PROBE_DEFER)
			err = -EPROBE_DEFER;
		else
			err = -ENODEV;
		goto err_exit;
	}

	err = PVRSRVCommonDeviceInit(dev_node);
	if (err) {
		DRM_ERROR("device %p initialisation failed (err=%d)\n",
			  ddev->dev, err);
		goto err_device_destroy;
	}

	drm_mode_config_init(ddev);
	ddev->dev_private = dev_node;

	return 0;

err_device_destroy:
	PVRSRVDeviceDestroy(dev_node);
err_exit:
	return err;
}

#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 11, 0))
static int pvr_drm_unload(struct drm_device *ddev)
#else
static void pvr_drm_unload(struct drm_device *ddev)
#endif
{
	DRM_DEBUG_DRIVER("device %p\n", ddev->dev);

	drm_mode_config_cleanup(ddev);

	PVRSRVCommonDeviceDeinit(ddev->dev_private);

	PVRSRVDeviceDestroy(ddev->dev_private);
	ddev->dev_private = NULL;

#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 11, 0))
	return 0;
#endif
}

static int pvr_drm_open(struct drm_device *ddev, struct drm_file *dfile)
{
	int err;

	if (!try_module_get(THIS_MODULE)) {
		DRM_ERROR("failed to get module reference\n");
		return -ENOENT;
	}

	err = PVRSRVCommonDeviceOpen(ddev->dev_private, dfile);
	if (err)
		module_put(THIS_MODULE);

	return err;
}

static void pvr_drm_release(struct drm_device *ddev, struct drm_file *dfile)
{
	PVRSRVCommonDeviceRelease(ddev->dev_private, dfile);

	module_put(THIS_MODULE);
}

/*
 * The DRM global lock is taken for ioctls unless the DRM_UNLOCKED flag is set.
 * If you revise one of the driver specific ioctls, or add a new one, that has
 * DRM_UNLOCKED set then consider whether the gPVRSRVLock mutex needs to be
 * taken.
 */
static struct drm_ioctl_desc pvr_drm_ioctls[] = {
	DRM_IOCTL_DEF_DRV(PVR_SRVKM_CMD, PVRSRV_BridgeDispatchKM, DRM_RENDER_ALLOW | DRM_UNLOCKED),
#if defined(PDUMP)
	DRM_IOCTL_DEF_DRV(PVR_DBGDRV_CMD, dbgdrv_ioctl, DRM_RENDER_ALLOW | DRM_AUTH | DRM_UNLOCKED),
#endif
};

#if defined(CONFIG_COMPAT)
#if defined(PDUMP)
static drm_ioctl_compat_t *pvr_drm_compat_ioctls[] = {
	[DRM_PVR_DBGDRV_CMD] = dbgdrv_ioctl_compat,
};
#endif

static long pvr_compat_ioctl(struct file *file, unsigned int cmd,
			     unsigned long arg)
{
	unsigned int nr = DRM_IOCTL_NR(cmd);

	if (nr < DRM_COMMAND_BASE)
		return drm_compat_ioctl(file, cmd, arg);

#if defined(PDUMP)
	if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(pvr_drm_compat_ioctls)) {
		drm_ioctl_compat_t *pfnBridge;

		pfnBridge = pvr_drm_compat_ioctls[nr - DRM_COMMAND_BASE];
		if (pfnBridge)
			return pfnBridge(file, cmd, arg);
	}
#endif

	return drm_ioctl(file, cmd, arg);
}
#endif /* defined(CONFIG_COMPAT) */

static const struct file_operations pvr_drm_fops = {
	.owner			= THIS_MODULE,
	.open			= drm_open,
	.release		= drm_release,
	/*
	 * FIXME:
	 * Wrap this in a function that checks enough data has been
	 * supplied with the ioctl (e.g. _IOCDIR(nr) != _IOC_NONE &&
	 * _IOC_SIZE(nr) == size).
	 */
	.unlocked_ioctl		= drm_ioctl,
#if defined(CONFIG_COMPAT)
	.compat_ioctl		= pvr_compat_ioctl,
#endif
	.mmap			= PVRSRV_MMap,
	.poll			= drm_poll,
	.read			= drm_read,
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 12, 0))
	.fasync			= drm_fasync,
#endif
};

const struct drm_driver pvr_drm_generic_driver = {
	.driver_features	= DRIVER_MODESET | DRIVER_RENDER,

	.dev_priv_size		= 0,
	.load			= pvr_drm_load,
	.unload			= pvr_drm_unload,
	.open			= pvr_drm_open,
	.postclose		= pvr_drm_release,

	.ioctls			= pvr_drm_ioctls,
	.num_ioctls		= ARRAY_SIZE(pvr_drm_ioctls),
	.fops			= &pvr_drm_fops,

	.name			= PVR_DRM_DRIVER_NAME,
	.desc			= PVR_DRM_DRIVER_DESC,
	.date			= PVR_DRM_DRIVER_DATE,
	.major			= PVRVERSION_MAJ,
	.minor			= PVRVERSION_MIN,
	.patchlevel		= PVRVERSION_BUILD,
};