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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <drm/drm_fb_helper.h>
#include "bochs.h"
static int bochs_modeset = -1;
module_param_named(modeset, bochs_modeset, int, 0444);
MODULE_PARM_DESC(modeset, "enable/disable kernel modesetting");
static bool enable_fbdev = true;
module_param_named(fbdev, enable_fbdev, bool, 0444);
MODULE_PARM_DESC(fbdev, "register fbdev device");
/* ---------------------------------------------------------------------- */
/* drm interface */
static void bochs_unload(struct drm_device *dev)
{
struct bochs_device *bochs = dev->dev_private;
bochs_fbdev_fini(bochs);
bochs_kms_fini(bochs);
bochs_mm_fini(bochs);
bochs_hw_fini(dev);
kfree(bochs);
dev->dev_private = NULL;
}
static int bochs_load(struct drm_device *dev, unsigned long flags)
{
struct bochs_device *bochs;
int ret;
bochs = kzalloc(sizeof(*bochs), GFP_KERNEL);
if (bochs == NULL)
return -ENOMEM;
dev->dev_private = bochs;
bochs->dev = dev;
ret = bochs_hw_init(dev, flags);
if (ret)
goto err;
ret = bochs_mm_init(bochs);
if (ret)
goto err;
ret = bochs_kms_init(bochs);
if (ret)
goto err;
if (enable_fbdev)
bochs_fbdev_init(bochs);
return 0;
err:
bochs_unload(dev);
return ret;
}
static const struct file_operations bochs_fops = {
.owner = THIS_MODULE,
.open = drm_open,
.release = drm_release,
.unlocked_ioctl = drm_ioctl,
.compat_ioctl = drm_compat_ioctl,
.poll = drm_poll,
.read = drm_read,
.llseek = no_llseek,
.mmap = bochs_mmap,
};
static struct drm_driver bochs_driver = {
.driver_features = DRIVER_GEM | DRIVER_MODESET,
.load = bochs_load,
.unload = bochs_unload,
.set_busid = drm_pci_set_busid,
.fops = &bochs_fops,
.name = "bochs-drm",
.desc = "bochs dispi vga interface (qemu stdvga)",
.date = "20130925",
.major = 1,
.minor = 0,
.gem_free_object_unlocked = bochs_gem_free_object,
.dumb_create = bochs_dumb_create,
.dumb_map_offset = bochs_dumb_mmap_offset,
.dumb_destroy = drm_gem_dumb_destroy,
};
/* ---------------------------------------------------------------------- */
/* pm interface */
#ifdef CONFIG_PM_SLEEP
static int bochs_pm_suspend(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct drm_device *drm_dev = pci_get_drvdata(pdev);
struct bochs_device *bochs = drm_dev->dev_private;
drm_kms_helper_poll_disable(drm_dev);
if (bochs->fb.initialized) {
console_lock();
drm_fb_helper_set_suspend(&bochs->fb.helper, 1);
console_unlock();
}
return 0;
}
static int bochs_pm_resume(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct drm_device *drm_dev = pci_get_drvdata(pdev);
struct bochs_device *bochs = drm_dev->dev_private;
drm_helper_resume_force_mode(drm_dev);
if (bochs->fb.initialized) {
console_lock();
drm_fb_helper_set_suspend(&bochs->fb.helper, 0);
console_unlock();
}
drm_kms_helper_poll_enable(drm_dev);
return 0;
}
#endif
static const struct dev_pm_ops bochs_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(bochs_pm_suspend,
bochs_pm_resume)
};
/* ---------------------------------------------------------------------- */
/* pci interface */
static int bochs_kick_out_firmware_fb(struct pci_dev *pdev)
{
struct apertures_struct *ap;
ap = alloc_apertures(1);
if (!ap)
return -ENOMEM;
ap->ranges[0].base = pci_resource_start(pdev, 0);
ap->ranges[0].size = pci_resource_len(pdev, 0);
drm_fb_helper_remove_conflicting_framebuffers(ap, "bochsdrmfb", false);
kfree(ap);
return 0;
}
static int bochs_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
unsigned long fbsize;
int ret;
fbsize = pci_resource_len(pdev, 0);
if (fbsize < 4 * 1024 * 1024) {
DRM_ERROR("less than 4 MB video memory, ignoring device\n");
return -ENOMEM;
}
ret = bochs_kick_out_firmware_fb(pdev);
if (ret)
return ret;
return drm_get_pci_dev(pdev, ent, &bochs_driver);
}
static void bochs_pci_remove(struct pci_dev *pdev)
{
struct drm_device *dev = pci_get_drvdata(pdev);
drm_put_dev(dev);
}
static const struct pci_device_id bochs_pci_tbl[] = {
{
.vendor = 0x1234,
.device = 0x1111,
.subvendor = PCI_SUBVENDOR_ID_REDHAT_QUMRANET,
.subdevice = PCI_SUBDEVICE_ID_QEMU,
.driver_data = BOCHS_QEMU_STDVGA,
},
{
.vendor = 0x1234,
.device = 0x1111,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = BOCHS_UNKNOWN,
},
{ /* end of list */ }
};
static struct pci_driver bochs_pci_driver = {
.name = "bochs-drm",
.id_table = bochs_pci_tbl,
.probe = bochs_pci_probe,
.remove = bochs_pci_remove,
.driver.pm = &bochs_pm_ops,
};
/* ---------------------------------------------------------------------- */
/* module init/exit */
static int __init bochs_init(void)
{
if (vgacon_text_force() && bochs_modeset == -1)
return -EINVAL;
if (bochs_modeset == 0)
return -EINVAL;
return drm_pci_init(&bochs_driver, &bochs_pci_driver);
}
static void __exit bochs_exit(void)
{
drm_pci_exit(&bochs_driver, &bochs_pci_driver);
}
module_init(bochs_init);
module_exit(bochs_exit);
MODULE_DEVICE_TABLE(pci, bochs_pci_tbl);
MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
MODULE_LICENSE("GPL");
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