2 * Copyright (C) 2015 Red Hat, Inc.
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
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10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
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.
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.
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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.
26 #include <linux/pci.h>
27 #include <drm/drm_fb_helper.h>
29 #include "virtgpu_drv.h"
31 static void virtio_pci_kick_out_firmware_fb(struct pci_dev *pci_dev)
33 struct apertures_struct *ap;
36 ap = alloc_apertures(1);
40 ap->ranges[0].base = pci_resource_start(pci_dev, 0);
41 ap->ranges[0].size = pci_resource_len(pci_dev, 0);
43 primary = pci_dev->resource[PCI_ROM_RESOURCE].flags
44 & IORESOURCE_ROM_SHADOW;
46 drm_fb_helper_remove_conflicting_framebuffers(ap, "virtiodrmfb", primary);
51 int drm_virtio_init(struct drm_driver *driver, struct virtio_device *vdev)
53 struct drm_device *dev;
56 dev = drm_dev_alloc(driver, &vdev->dev);
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;
68 DRM_INFO("pci: %s detected at %s\n",
69 vga ? "virtio-vga" : "virtio-gpu-pci",
73 virtio_pci_kick_out_firmware_fb(pdev);
75 snprintf(unique, sizeof(unique), "pci:%s", pname);
76 ret = drm_dev_set_unique(dev, unique);
82 ret = drm_dev_register(dev, 0);