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1/*
2 * Copyright (C) 2015 Red Hat, Inc.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26#include <linux/pci.h>
27
28#include "virtgpu_drv.h"
29
30int drm_virtio_set_busid(struct drm_device *dev, struct drm_master *master)
31{
32 struct pci_dev *pdev = dev->pdev;
33
34 if (pdev) {
35 return drm_pci_set_busid(dev, master);
36 }
37 return 0;
38}
39
40static void virtio_pci_kick_out_firmware_fb(struct pci_dev *pci_dev)
41{
42 struct apertures_struct *ap;
43 bool primary;
44
45 ap = alloc_apertures(1);
46 if (!ap)
47 return;
48
49 ap->ranges[0].base = pci_resource_start(pci_dev, 0);
50 ap->ranges[0].size = pci_resource_len(pci_dev, 0);
51
52 primary = pci_dev->resource[PCI_ROM_RESOURCE].flags
53 & IORESOURCE_ROM_SHADOW;
54
55 remove_conflicting_framebuffers(ap, "virtiodrmfb", primary);
56
57 kfree(ap);
58}
59
60int drm_virtio_init(struct drm_driver *driver, struct virtio_device *vdev)
61{
62 struct drm_device *dev;
63 int ret;
64
65 dev = drm_dev_alloc(driver, &vdev->dev);
66 if (!dev)
67 return -ENOMEM;
68 dev->virtdev = vdev;
69 vdev->priv = dev;
70
71 if (strcmp(vdev->dev.parent->bus->name, "pci") == 0) {
72 struct pci_dev *pdev = to_pci_dev(vdev->dev.parent);
73 bool vga = (pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA;
74
75 DRM_INFO("pci: %s detected\n",
76 vga ? "virtio-vga" : "virtio-gpu-pci");
77 dev->pdev = pdev;
78 if (vga)
79 virtio_pci_kick_out_firmware_fb(pdev);
80 }
81
82 ret = drm_dev_register(dev, 0);
83 if (ret)
84 goto err_free;
85
86 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
87 driver->major, driver->minor, driver->patchlevel,
88 driver->date, dev->primary->index);
89
90 return 0;
91
92err_free:
93 drm_dev_unref(dev);
94 return ret;
95}
1/*
2 * Copyright (C) 2015 Red Hat, Inc.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26#include <linux/pci.h>
27#include <drm/drm_fb_helper.h>
28
29#include "virtgpu_drv.h"
30
31static void virtio_pci_kick_out_firmware_fb(struct pci_dev *pci_dev)
32{
33 struct apertures_struct *ap;
34 bool primary;
35
36 ap = alloc_apertures(1);
37 if (!ap)
38 return;
39
40 ap->ranges[0].base = pci_resource_start(pci_dev, 0);
41 ap->ranges[0].size = pci_resource_len(pci_dev, 0);
42
43 primary = pci_dev->resource[PCI_ROM_RESOURCE].flags
44 & IORESOURCE_ROM_SHADOW;
45
46 drm_fb_helper_remove_conflicting_framebuffers(ap, "virtiodrmfb", primary);
47
48 kfree(ap);
49}
50
51int drm_virtio_init(struct drm_driver *driver, struct virtio_device *vdev)
52{
53 struct drm_device *dev;
54 int ret;
55
56 dev = drm_dev_alloc(driver, &vdev->dev);
57 if (IS_ERR(dev))
58 return PTR_ERR(dev);
59 dev->virtdev = vdev;
60 vdev->priv = dev;
61
62 if (strcmp(vdev->dev.parent->bus->name, "pci") == 0) {
63 struct pci_dev *pdev = to_pci_dev(vdev->dev.parent);
64 const char *pname = dev_name(&pdev->dev);
65 bool vga = (pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA;
66 char unique[20];
67
68 DRM_INFO("pci: %s detected at %s\n",
69 vga ? "virtio-vga" : "virtio-gpu-pci",
70 pname);
71 dev->pdev = pdev;
72 if (vga)
73 virtio_pci_kick_out_firmware_fb(pdev);
74
75 snprintf(unique, sizeof(unique), "pci:%s", pname);
76 ret = drm_dev_set_unique(dev, unique);
77 if (ret)
78 goto err_free;
79
80 }
81
82 ret = drm_dev_register(dev, 0);
83 if (ret)
84 goto err_free;
85
86 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
87 driver->major, driver->minor, driver->patchlevel,
88 driver->date, dev->primary->index);
89
90 return 0;
91
92err_free:
93 drm_dev_unref(dev);
94 return ret;
95}