[mirror_ubuntu-eoan-kernel.git] / drivers / gpu / drm / bochs / bochs_drv.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 */

#include <linux/mm.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_probe_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");

/* ---------------------------------------------------------------------- */
/* drm interface                                                          */

static void bochs_unload(struct drm_device *dev)
{
	struct bochs_device *bochs = dev->dev_private;

	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)
{
	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);
	if (ret)
		goto err;

	ret = bochs_mm_init(bochs);
	if (ret)
		goto err;

	ret = bochs_kms_init(bochs);
	if (ret)
		goto err;

	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 | DRIVER_ATOMIC |
				  DRIVER_PRIME,
	.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,

	.gem_prime_export = drm_gem_prime_export,
	.gem_prime_import = drm_gem_prime_import,
	.gem_prime_pin = bochs_gem_prime_pin,
	.gem_prime_unpin = bochs_gem_prime_unpin,
	.gem_prime_vmap = bochs_gem_prime_vmap,
	.gem_prime_vunmap = bochs_gem_prime_vunmap,
	.gem_prime_mmap = bochs_gem_prime_mmap,
};

/* ---------------------------------------------------------------------- */
/* 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);

	return drm_mode_config_helper_suspend(drm_dev);
}

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);

	return drm_mode_config_helper_resume(drm_dev);
}
#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_pci_probe(struct pci_dev *pdev,
			   const struct pci_device_id *ent)
{
	struct drm_device *dev;
	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 = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, "bochsdrmfb");
	if (ret)
		return ret;

	dev = drm_dev_alloc(&bochs_driver, &pdev->dev);
	if (IS_ERR(dev))
		return PTR_ERR(dev);

	ret = pci_enable_device(pdev);
	if (ret)
		goto err_free_dev;

	dev->pdev = pdev;
	pci_set_drvdata(pdev, dev);

	ret = bochs_load(dev);
	if (ret)
		goto err_free_dev;

	ret = drm_dev_register(dev, 0);
	if (ret)
		goto err_unload;

	drm_fbdev_generic_setup(dev, 32);
	return ret;

err_unload:
	bochs_unload(dev);
err_free_dev:
	drm_dev_put(dev);
	return ret;
}

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

	drm_dev_unregister(dev);
	bochs_unload(dev);
	drm_dev_put(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 pci_register_driver(&bochs_pci_driver);
}

static void __exit bochs_exit(void)
{
	pci_unregister_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");
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
0a6659bd	2	/*
0a6659bd GH	3	*/
	4
	5	#include <linux/mm.h>
	6	#include <linux/module.h>
	7	#include <linux/slab.h>
44adece5	8	#include <drm/drm_fb_helper.h>
fcd70cd3	9	#include <drm/drm_probe_helper.h>
0a6659bd GH	10
	11	#include "bochs.h"
	12
1acf5661 MS	13	static int bochs_modeset = -1;
	14	module_param_named(modeset, bochs_modeset, int, 0444);
	15	MODULE_PARM_DESC(modeset, "enable/disable kernel modesetting");
	16
0a6659bd GH	17	/* ---------------------------------------------------------------------- */
	18	/* drm interface */
	19
11b3c20b	20	static void bochs_unload(struct drm_device *dev)
0a6659bd GH	21	{
	22	struct bochs_device *bochs = dev->dev_private;
	23
0a6659bd GH	24	bochs_kms_fini(bochs);
	25	bochs_mm_fini(bochs);
	26	bochs_hw_fini(dev);
	27	kfree(bochs);
	28	dev->dev_private = NULL;
0a6659bd GH	29	}
0a6659bd GH	30
7780eb9c	31	static int bochs_load(struct drm_device *dev)
0a6659bd GH	32	{
	33	struct bochs_device *bochs;
	34	int ret;
	35
	36	bochs = kzalloc(sizeof(*bochs), GFP_KERNEL);
	37	if (bochs == NULL)
	38	return -ENOMEM;
	39	dev->dev_private = bochs;
	40	bochs->dev = dev;
	41
7780eb9c	42	ret = bochs_hw_init(dev);
0a6659bd GH	43	if (ret)
	44	goto err;
	45
	46	ret = bochs_mm_init(bochs);
	47	if (ret)
	48	goto err;
	49
	50	ret = bochs_kms_init(bochs);
	51	if (ret)
	52	goto err;
	53
0a6659bd GH	54	return 0;
	55
	56	err:
	57	bochs_unload(dev);
	58	return ret;
	59	}
	60
	61	static const struct file_operations bochs_fops = {
	62	.owner = THIS_MODULE,
	63	.open = drm_open,
	64	.release = drm_release,
	65	.unlocked_ioctl = drm_ioctl,
0a6659bd	66	.compat_ioctl = drm_compat_ioctl,
0a6659bd GH	67	.poll = drm_poll,
	68	.read = drm_read,
	69	.llseek = no_llseek,
	70	.mmap = bochs_mmap,
	71	};
	72
	73	static struct drm_driver bochs_driver = {
132a4534 GH	74	.driver_features = DRIVER_GEM \| DRIVER_MODESET \| DRIVER_ATOMIC \|
132a4534 GH	75	DRIVER_PRIME,
0a6659bd GH	76	.fops = &bochs_fops,
	77	.name = "bochs-drm",
	78	.desc = "bochs dispi vga interface (qemu stdvga)",
	79	.date = "20130925",
	80	.major = 1,
	81	.minor = 0,
6f2c1c15	82	.gem_free_object_unlocked = bochs_gem_free_object,
0a6659bd GH	83	.dumb_create = bochs_dumb_create,
0a6659bd GH	84	.dumb_map_offset = bochs_dumb_mmap_offset,
132a4534 GH	85
	86	.gem_prime_export = drm_gem_prime_export,
	87	.gem_prime_import = drm_gem_prime_import,
	88	.gem_prime_pin = bochs_gem_prime_pin,
	89	.gem_prime_unpin = bochs_gem_prime_unpin,
	90	.gem_prime_vmap = bochs_gem_prime_vmap,
	91	.gem_prime_vunmap = bochs_gem_prime_vunmap,
	92	.gem_prime_mmap = bochs_gem_prime_mmap,
0a6659bd GH	93	};
0a6659bd GH	94
b8ccd70f GH	95	/* ---------------------------------------------------------------------- */
	96	/* pm interface */
	97
150cee9c	98	#ifdef CONFIG_PM_SLEEP
b8ccd70f GH	99	static int bochs_pm_suspend(struct device *dev)
	100	{
	101	struct pci_dev *pdev = to_pci_dev(dev);
	102	struct drm_device *drm_dev = pci_get_drvdata(pdev);
b8ccd70f	103
568a4c72	104	return drm_mode_config_helper_suspend(drm_dev);
b8ccd70f GH	105	}
	106
	107	static int bochs_pm_resume(struct device *dev)
	108	{
	109	struct pci_dev *pdev = to_pci_dev(dev);
	110	struct drm_device *drm_dev = pci_get_drvdata(pdev);
b8ccd70f	111
568a4c72	112	return drm_mode_config_helper_resume(drm_dev);
b8ccd70f	113	}
150cee9c	114	#endif
b8ccd70f GH	115
	116	static const struct dev_pm_ops bochs_pm_ops = {
	117	SET_SYSTEM_SLEEP_PM_OPS(bochs_pm_suspend,
	118	bochs_pm_resume)
	119	};
	120
0a6659bd GH	121	/* ---------------------------------------------------------------------- */
	122	/* pci interface */
	123
0a6659bd GH	124	static int bochs_pci_probe(struct pci_dev *pdev,
	125	const struct pci_device_id *ent)
	126	{
7780eb9c	127	struct drm_device *dev;
de595762	128	unsigned long fbsize;
0a6659bd GH	129	int ret;
0a6659bd GH	130
de595762 GH	131	fbsize = pci_resource_len(pdev, 0);
	132	if (fbsize < 4 * 1024 * 1024) {
	133	DRM_ERROR("less than 4 MB video memory, ignoring device\n");
	134	return -ENOMEM;
	135	}
	136
77d1ed41	137	ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, "bochsdrmfb");
0a6659bd GH	138	if (ret)
	139	return ret;
	140
7780eb9c PW	141	dev = drm_dev_alloc(&bochs_driver, &pdev->dev);
	142	if (IS_ERR(dev))
	143	return PTR_ERR(dev);
	144
17fb465f AF	145	ret = pci_enable_device(pdev);
	146	if (ret)
	147	goto err_free_dev;
	148
7780eb9c PW	149	dev->pdev = pdev;
	150	pci_set_drvdata(pdev, dev);
	151
	152	ret = bochs_load(dev);
	153	if (ret)
	154	goto err_free_dev;
	155
	156	ret = drm_dev_register(dev, 0);
	157	if (ret)
	158	goto err_unload;
	159
7a0483ac	160	drm_fbdev_generic_setup(dev, 32);
7780eb9c PW	161	return ret;
	162
	163	err_unload:
	164	bochs_unload(dev);
	165	err_free_dev:
	166	drm_dev_put(dev);
	167	return ret;
0a6659bd GH	168	}
	169
	170	static void bochs_pci_remove(struct pci_dev *pdev)
	171	{
	172	struct drm_device *dev = pci_get_drvdata(pdev);
	173
7780eb9c PW	174	drm_dev_unregister(dev);
	175	bochs_unload(dev);
	176	drm_dev_put(dev);
0a6659bd GH	177	}
0a6659bd GH	178
9baa3c34	179	static const struct pci_device_id bochs_pci_tbl[] = {
0a6659bd GH	180	{
	181	.vendor = 0x1234,
	182	.device = 0x1111,
caf02abf RJ	183	.subvendor = PCI_SUBVENDOR_ID_REDHAT_QUMRANET,
caf02abf RJ	184	.subdevice = PCI_SUBDEVICE_ID_QEMU,
0a6659bd GH	185	.driver_data = BOCHS_QEMU_STDVGA,
	186	},
	187	{
	188	.vendor = 0x1234,
	189	.device = 0x1111,
	190	.subvendor = PCI_ANY_ID,
	191	.subdevice = PCI_ANY_ID,
	192	.driver_data = BOCHS_UNKNOWN,
	193	},
	194	{ /* end of list */ }
	195	};
	196
	197	static struct pci_driver bochs_pci_driver = {
	198	.name = "bochs-drm",
	199	.id_table = bochs_pci_tbl,
	200	.probe = bochs_pci_probe,
	201	.remove = bochs_pci_remove,
b8ccd70f	202	.driver.pm = &bochs_pm_ops,
0a6659bd GH	203	};
	204
	205	/* ---------------------------------------------------------------------- */
	206	/* module init/exit */
	207
	208	static int __init bochs_init(void)
	209	{
1acf5661 MS	210	if (vgacon_text_force() && bochs_modeset == -1)
	211	return -EINVAL;
	212
	213	if (bochs_modeset == 0)
	214	return -EINVAL;
	215
10631d72	216	return pci_register_driver(&bochs_pci_driver);
0a6659bd GH	217	}
	218
	219	static void __exit bochs_exit(void)
	220	{
10631d72	221	pci_unregister_driver(&bochs_pci_driver);
0a6659bd GH	222	}
	223
	224	module_init(bochs_init);
	225	module_exit(bochs_exit);
	226
	227	MODULE_DEVICE_TABLE(pci, bochs_pci_tbl);
	228	MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
	229	MODULE_LICENSE("GPL");