source: vbox/trunk/src/VBox/Additions/linux/drm/vbox_drv.c@ 69496

/*  $Id: vbox_drv.c 69143 2017-10-20 10:17:44Z vboxsync $ */
/** @file
 * VirtualBox Additions Linux kernel video driver
 */

/*
 * Copyright (C) 2013-2017 Oracle Corporation
 * This file is based on ast_drv.c
 * Copyright 2012 Red Hat Inc.
 *
 * 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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.
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * Authors: Dave Airlie <[email protected]>
 *          Michael Thayer <[email protected],
 *          Hans de Goede <[email protected]>
 */
#include "vbox_drv.h"

#include "version-generated.h"
#include "revision-generated.h"

#include <linux/module.h>
#include <linux/console.h>
#include <linux/vt_kern.h>

#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>

int vbox_modeset = -1;

MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
module_param_named(modeset, vbox_modeset, int, 0400);

static struct drm_driver driver;

static const struct pci_device_id pciidlist[] = {
        { 0x80ee, 0xbeef, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
        { 0, 0, 0},
};
MODULE_DEVICE_TABLE(pci, pciidlist);

static int vbox_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
        return drm_get_pci_dev(pdev, ent, &driver);
}

static void vbox_pci_remove(struct pci_dev *pdev)
{
        struct drm_device *dev = pci_get_drvdata(pdev);

        drm_put_dev(dev);
}

static int vbox_drm_freeze(struct drm_device *dev)
{
        drm_kms_helper_poll_disable(dev);

        pci_save_state(dev->pdev);

        console_lock();
        vbox_fbdev_set_suspend(dev, 1);
        console_unlock();

        return 0;
}

static int vbox_drm_thaw(struct drm_device *dev)
{
        drm_mode_config_reset(dev);
        drm_helper_resume_force_mode(dev);

        console_lock();
        vbox_fbdev_set_suspend(dev, 0);
        console_unlock();

        return 0;
}

static int vbox_drm_resume(struct drm_device *dev)
{
        int ret;

        if (pci_enable_device(dev->pdev))
                return -EIO;

        ret = vbox_drm_thaw(dev);
        if (ret)
                return ret;

        drm_kms_helper_poll_enable(dev);

        return 0;
}

static int vbox_pm_suspend(struct device *dev)
{
        struct pci_dev *pdev = to_pci_dev(dev);
        struct drm_device *ddev = pci_get_drvdata(pdev);
        int error;

        error = vbox_drm_freeze(ddev);
        if (error)
                return error;

        pci_disable_device(pdev);
        pci_set_power_state(pdev, PCI_D3hot);

        return 0;
}

static int vbox_pm_resume(struct device *dev)
{
        struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));

        return vbox_drm_resume(ddev);
}

static int vbox_pm_freeze(struct device *dev)
{
        struct pci_dev *pdev = to_pci_dev(dev);
        struct drm_device *ddev = pci_get_drvdata(pdev);

        if (!ddev || !ddev->dev_private)
                return -ENODEV;

        return vbox_drm_freeze(ddev);
}

static int vbox_pm_thaw(struct device *dev)
{
        struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));

        return vbox_drm_thaw(ddev);
}

static int vbox_pm_poweroff(struct device *dev)
{
        struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));

        return vbox_drm_freeze(ddev);
}

static const struct dev_pm_ops vbox_pm_ops = {
        .suspend = vbox_pm_suspend,
        .resume = vbox_pm_resume,
        .freeze = vbox_pm_freeze,
        .thaw = vbox_pm_thaw,
        .poweroff = vbox_pm_poweroff,
        .restore = vbox_pm_resume,
};

static struct pci_driver vbox_pci_driver = {
        .name = DRIVER_NAME,
        .id_table = pciidlist,
        .probe = vbox_pci_probe,
        .remove = vbox_pci_remove,
        .driver.pm = &vbox_pm_ops,
};

#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0) && !defined(RHEL_74)
/* This works around a bug in X servers prior to 1.18.4, which sometimes
 * submit more dirty rectangles than the kernel is willing to handle and
 * then disable dirty rectangle handling altogether when they see the
 * EINVAL error.  I do not want the code to hang around forever, which is
 * why I am limiting it to certain kernel versions.  We can increase the
 * limit if some distributions uses old X servers with new kernels. */
long vbox_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
        long rc = drm_ioctl(filp, cmd, arg);

        if (cmd == DRM_IOCTL_MODE_DIRTYFB && rc == -EINVAL)
                return -EOVERFLOW;

        return rc;
}
#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0) && !RHEL_74 */

static const struct file_operations vbox_fops = {
        .owner = THIS_MODULE,
        .open = drm_open,
        .release = drm_release,
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0) && !defined(RHEL_74)
        .unlocked_ioctl = vbox_ioctl,
#else
        .unlocked_ioctl = drm_ioctl,
#endif
        .mmap = vbox_mmap,
        .poll = drm_poll,
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 12, 0) && !defined(RHEL_73)
        .fasync = drm_fasync,
#endif
#ifdef CONFIG_COMPAT
        .compat_ioctl = drm_compat_ioctl,
#endif
        .read = drm_read,
};

static int vbox_master_set(struct drm_device *dev,
                           struct drm_file *file_priv, bool from_open)
{
        struct vbox_private *vbox = dev->dev_private;

        /*
         * We do not yet know whether the new owner can handle hotplug, so we
         * do not advertise dynamic modes on the first query and send a
         * tentative hotplug notification after that to see if they query again.
         */
        vbox->initial_mode_queried = false;

        mutex_lock(&vbox->hw_mutex);
        /*
         * Disable VBVA when someone releases master in case the next person
         * tries tries to do VESA.
         */
        /** @todo work out if anyone is likely to and whether it will work. */
        /*
         * Update: we also disable it because if the new master does not do
         * dirty rectangle reporting (e.g. old versions of Plymouth) then at
         * least the first screen will still be updated. We enable it as soon
         * as we receive a dirty rectangle report.
         */
        vbox_disable_accel(vbox);
        mutex_unlock(&vbox->hw_mutex);

        return 0;
}

#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 8, 0) && !defined(RHEL_74)
static void vbox_master_drop(struct drm_device *dev,
                             struct drm_file *file_priv, bool from_release)
#else
static void vbox_master_drop(struct drm_device *dev, struct drm_file *file_priv)
#endif
{
        struct vbox_private *vbox = dev->dev_private;

        /* See vbox_master_set() */
        vbox->initial_mode_queried = false;

        mutex_lock(&vbox->hw_mutex);
        vbox_disable_accel(vbox);
        mutex_unlock(&vbox->hw_mutex);
}

static struct drm_driver driver = {
        .driver_features =
            DRIVER_MODESET | DRIVER_GEM | DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED |
            DRIVER_PRIME,
        .dev_priv_size = 0,

        .load = vbox_driver_load,
        .unload = vbox_driver_unload,
        .lastclose = vbox_driver_lastclose,
        .master_set = vbox_master_set,
        .master_drop = vbox_master_drop,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 18, 0) || defined(RHEL_73)
# if LINUX_VERSION_CODE < KERNEL_VERSION(4, 14, 0)
        .set_busid = drm_pci_set_busid,
# endif
#endif

        .fops = &vbox_fops,
        .irq_handler = vbox_irq_handler,
        .name = DRIVER_NAME,
        .desc = DRIVER_DESC,
        .date = DRIVER_DATE,
        .major = DRIVER_MAJOR,
        .minor = DRIVER_MINOR,
        .patchlevel = DRIVER_PATCHLEVEL,

        .gem_free_object = vbox_gem_free_object,
        .dumb_create = vbox_dumb_create,
        .dumb_map_offset = vbox_dumb_mmap_offset,
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 12, 0) && !defined(RHEL_73)
        .dumb_destroy = vbox_dumb_destroy,
#else
        .dumb_destroy = drm_gem_dumb_destroy,
#endif
        .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
        .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
        .gem_prime_export = drm_gem_prime_export,
        .gem_prime_import = drm_gem_prime_import,
        .gem_prime_pin = vbox_gem_prime_pin,
        .gem_prime_unpin = vbox_gem_prime_unpin,
        .gem_prime_get_sg_table = vbox_gem_prime_get_sg_table,
        .gem_prime_import_sg_table = vbox_gem_prime_import_sg_table,
        .gem_prime_vmap = vbox_gem_prime_vmap,
        .gem_prime_vunmap = vbox_gem_prime_vunmap,
        .gem_prime_mmap = vbox_gem_prime_mmap,
};

static int __init vbox_init(void)
{
#ifdef CONFIG_VGA_CONSOLE || LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0)
        if (vgacon_text_force() && vbox_modeset == -1)
                return -EINVAL;
#endif

        if (vbox_modeset == 0)
                return -EINVAL;

        return pci_register_driver(&vbox_pci_driver);
}

static void __exit vbox_exit(void)
{
        pci_unregister_driver(&vbox_pci_driver);
}

module_init(vbox_init);
module_exit(vbox_exit);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL and additional rights");
#ifdef MODULE_VERSION
MODULE_VERSION(VBOX_VERSION_STRING " r" __stringify(VBOX_SVN_REV));
#endif