static int cirrus_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int ret;
ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, "cirrusdrmfb");
if (ret)
return ret;
return drm_get_pci_dev(pdev, ent, &driver);
}
static int virtio_gpu_pci_quirk(struct drm_device *dev, struct virtio_device *vdev)
{
struct pci_dev *pdev = to_pci_dev(vdev->dev.parent);
const char *pname = dev_name(&pdev->dev);
bool vga = (pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA;
char unique[20];
DRM_INFO("pci: %s detected at %s\n",
vga ? "virtio-vga" : "virtio-gpu-pci",
pname);
dev->pdev = pdev;
if (vga)
drm_fb_helper_remove_conflicting_pci_framebuffers(pdev,
0,
"virtiodrmfb");
/*
* Normally the drm_dev_set_unique() call is done by core DRM.
* The following comment covers, why virtio cannot rely on it.
*
* Unlike the other virtual GPU drivers, virtio abstracts the
* underlying bus type by using struct virtio_device.
*
* Hence the dev_is_pci() check, used in core DRM, will fail
* and the unique returned will be the virtio_device "virtio0",
* while a "pci:..." one is required.
*
* A few other ideas were considered:
* - Extend the dev_is_pci() check [in drm_set_busid] to
* consider virtio.
* Seems like a bigger hack than what we have already.
*
* - Point drm_device::dev to the parent of the virtio_device
* Semantic changes:
* * Using the wrong device for i2c, framebuffer_alloc and
* prime import.
* Visual changes:
* * Helpers such as DRM_DEV_ERROR, dev_info, drm_printer,
* will print the wrong information.
*
* We could address the latter issues, by introducing
* drm_device::bus_dev, ... which would be used solely for this.
*
* So for the moment keep things as-is, with a bulky comment
* for the next person who feels like removing this
* drm_dev_set_unique() quirk.
*/
snprintf(unique, sizeof(unique), "pci:%s", pname);
return drm_dev_set_unique(dev, unique);
}
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;
return ret;
err_unload:
bochs_unload(dev);
err_free_dev:
drm_dev_put(dev);
return ret;
}
