LXR linux/drivers/gpu/drm/virtio/virtgpu_drm

   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}
  96