summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/mgag200/mgag200_drv.c
blob: c2f0e4b40b0527fd4dccf85a22fa89008c3f2211 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright 2012 Red Hat
 *
 * Authors: Matthew Garrett
 *          Dave Airlie
 */

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

#include <drm/drm_drv.h>
#include <drm/drm_file.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_pciids.h>

#include "mgag200_drv.h"

/*
 * This is the generic driver code. This binds the driver to the drm core,
 * which then performs further device association and calls our graphics init
 * functions
 */
int mgag200_modeset = -1;

MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
module_param_named(modeset, mgag200_modeset, int, 0400);

int mgag200_hw_bug_no_startadd = -1;
MODULE_PARM_DESC(modeset, "HW does not interpret scanout-buffer start address correctly");
module_param_named(hw_bug_no_startadd, mgag200_hw_bug_no_startadd, int, 0400);

static struct drm_driver driver;

static const struct pci_device_id pciidlist[] = {
	{ PCI_VENDOR_ID_MATROX, 0x522, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
		G200_SE_A | MGAG200_FLAG_HW_BUG_NO_STARTADD},
	{ PCI_VENDOR_ID_MATROX, 0x524, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_B },
	{ PCI_VENDOR_ID_MATROX, 0x530, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EV },
	{ PCI_VENDOR_ID_MATROX, 0x532, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_WB },
	{ PCI_VENDOR_ID_MATROX, 0x533, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH },
	{ PCI_VENDOR_ID_MATROX, 0x534, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_ER },
	{ PCI_VENDOR_ID_MATROX, 0x536, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EW3 },
	{ PCI_VENDOR_ID_MATROX, 0x538, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH3 },
	{0,}
};

MODULE_DEVICE_TABLE(pci, pciidlist);


static int mga_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	struct drm_device *dev;
	int ret;

	drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, "mgag200drmfb");

	ret = pci_enable_device(pdev);
	if (ret)
		return ret;

	dev = drm_dev_alloc(&driver, &pdev->dev);
	if (IS_ERR(dev)) {
		ret = PTR_ERR(dev);
		goto err_pci_disable_device;
	}

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

	ret = mgag200_driver_load(dev, ent->driver_data);
	if (ret)
		goto err_drm_dev_put;

	ret = drm_dev_register(dev, ent->driver_data);
	if (ret)
		goto err_mgag200_driver_unload;

	drm_fbdev_generic_setup(dev, 0);

	return 0;

err_mgag200_driver_unload:
	mgag200_driver_unload(dev);
err_drm_dev_put:
	drm_dev_put(dev);
err_pci_disable_device:
	pci_disable_device(pdev);
	return ret;
}

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

	drm_dev_unregister(dev);
	mgag200_driver_unload(dev);
	drm_dev_put(dev);
}

DEFINE_DRM_GEM_FOPS(mgag200_driver_fops);

static bool mgag200_pin_bo_at_0(const struct mga_device *mdev)
{
	if (mgag200_hw_bug_no_startadd > 0) {
		DRM_WARN_ONCE("Option hw_bug_no_startradd is enabled. Please "
			      "report the output of 'lspci -vvnn' to "
			      "<dri-devel@lists.freedesktop.org> if this "
			      "option is required to make mgag200 work "
			      "correctly on your system.\n");
		return true;
	} else if (!mgag200_hw_bug_no_startadd) {
		return false;
	}
	return mdev->flags & MGAG200_FLAG_HW_BUG_NO_STARTADD;
}

int mgag200_driver_dumb_create(struct drm_file *file,
			       struct drm_device *dev,
			       struct drm_mode_create_dumb *args)
{
	struct mga_device *mdev = to_mga_device(dev);
	unsigned long pg_align;

	if (WARN_ONCE(!dev->vram_mm, "VRAM MM not initialized"))
		return -EINVAL;

	pg_align = 0ul;

	/*
	 * Aligning scanout buffers to the size of the video ram forces
	 * placement at offset 0. Works around a bug where HW does not
	 * respect 'startadd' field.
	 */
	if (mgag200_pin_bo_at_0(mdev))
		pg_align = PFN_UP(mdev->mc.vram_size);

	return drm_gem_vram_fill_create_dumb(file, dev, pg_align, 0, args);
}

static struct drm_driver driver = {
	.driver_features = DRIVER_GEM | DRIVER_MODESET,
	.fops = &mgag200_driver_fops,
	.name = DRIVER_NAME,
	.desc = DRIVER_DESC,
	.date = DRIVER_DATE,
	.major = DRIVER_MAJOR,
	.minor = DRIVER_MINOR,
	.patchlevel = DRIVER_PATCHLEVEL,
	.debugfs_init = drm_vram_mm_debugfs_init,
	.dumb_create = mgag200_driver_dumb_create,
	.dumb_map_offset = drm_gem_vram_driver_dumb_mmap_offset,
	.gem_prime_mmap = drm_gem_prime_mmap,
};

static struct pci_driver mgag200_pci_driver = {
	.name = DRIVER_NAME,
	.id_table = pciidlist,
	.probe = mga_pci_probe,
	.remove = mga_pci_remove,
};

static int __init mgag200_init(void)
{
	if (vgacon_text_force() && mgag200_modeset == -1)
		return -EINVAL;

	if (mgag200_modeset == 0)
		return -EINVAL;

	return pci_register_driver(&mgag200_pci_driver);
}

static void __exit mgag200_exit(void)
{
	pci_unregister_driver(&mgag200_pci_driver);
}

module_init(mgag200_init);
module_exit(mgag200_exit);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");