drm/virtio: Drop deprecated load/unload initialization

Move the code around so the driver is probed the bus
.probe and removed from the bus .remove callbacks.
This commit is just a cleanup and shouldn't affect
functionality.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20190108145930.15080-1-ezequiel@collabora.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

drivers/gpu/drm/virtio/Makefile

@@ -3,7 +3,7 @@
 # Makefile for the drm device driver.  This driver provides support for the
 # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
 
-virtio-gpu-y := virtgpu_drv.o virtgpu_kms.o virtgpu_drm_bus.o virtgpu_gem.o \
+virtio-gpu-y := virtgpu_drv.o virtgpu_kms.o virtgpu_gem.o \
 	virtgpu_fb.o virtgpu_display.o virtgpu_vq.o virtgpu_ttm.o \
 	virtgpu_fence.o virtgpu_object.o virtgpu_debugfs.o virtgpu_plane.o \
 	virtgpu_ioctl.o virtgpu_prime.o

drivers/gpu/drm/virtio/virtgpu_display.c

@@ -358,7 +358,7 @@ static const struct drm_mode_config_funcs virtio_gpu_mode_funcs = {
 	.atomic_commit = drm_atomic_helper_commit,
 };
 
-int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev)
+void virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev)
 {
 	int i;
 
@@ -377,7 +377,6 @@ int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev)
 		vgdev_output_init(vgdev, i);
 
 	drm_mode_config_reset(vgdev->ddev);
-	return 0;
 }
 
 void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev)

drivers/gpu/drm/virtio/virtgpu_drm_bus.c

@@ -1,103 +0,0 @@
-/*
- * Copyright (C) 2015 Red Hat, Inc.
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial
- * portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
- * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-#include <linux/pci.h>
-#include <drm/drm_fb_helper.h>
-
-#include "virtgpu_drv.h"
-
-int drm_virtio_init(struct drm_driver *driver, struct virtio_device *vdev)
-{
-	struct drm_device *dev;
-	int ret;
-
-	dev = drm_dev_alloc(driver, &vdev->dev);
-	if (IS_ERR(dev))
-		return PTR_ERR(dev);
-	vdev->priv = dev;
-
-	if (strcmp(vdev->dev.parent->bus->name, "pci") == 0) {
-		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);
-		ret = drm_dev_set_unique(dev, unique);
-		if (ret)
-			goto err_free;
-
-	}
-
-	ret = drm_dev_register(dev, 0);
-	if (ret)
-		goto err_free;
-
-	return 0;
-
-err_free:
-	drm_dev_put(dev);
-	return ret;
-}

drivers/gpu/drm/virtio/virtgpu_drv.c

@@ -40,8 +40,60 @@ static int virtio_gpu_modeset = -1;
 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
 module_param_named(modeset, virtio_gpu_modeset, int, 0400);
 
+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 virtio_gpu_probe(struct virtio_device *vdev)
 {
+	struct drm_device *dev;
 	int ret;
 
 	if (vgacon_text_force() && virtio_gpu_modeset == -1)
@@ -50,18 +102,39 @@ static int virtio_gpu_probe(struct virtio_device *vdev)
 	if (virtio_gpu_modeset == 0)
 		return -EINVAL;
 
-	ret = drm_virtio_init(&driver, vdev);
+	dev = drm_dev_alloc(&driver, &vdev->dev);
+	if (IS_ERR(dev))
+		return PTR_ERR(dev);
+	vdev->priv = dev;
+
+	if (!strcmp(vdev->dev.parent->bus->name, "pci")) {
+		ret = virtio_gpu_pci_quirk(dev, vdev);
+		if (ret)
+			goto err_free;
+	}
+
+	ret = virtio_gpu_init(dev);
 	if (ret)
-		return ret;
+		goto err_free;
+
+	ret = drm_dev_register(dev, 0);
+	if (ret)
+		goto err_free;
 
 	drm_fbdev_generic_setup(vdev->priv, 32);
 	return 0;
+
+err_free:
+	drm_dev_put(dev);
+	return ret;
 }
 
 static void virtio_gpu_remove(struct virtio_device *vdev)
 {
 	struct drm_device *dev = vdev->priv;
 
+	drm_dev_unregister(dev);
+	virtio_gpu_deinit(dev);
 	drm_put_dev(dev);
 }
 
@@ -123,8 +196,6 @@ static const struct file_operations virtio_gpu_driver_fops = {
 
 static struct drm_driver driver = {
 	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME | DRIVER_RENDER | DRIVER_ATOMIC,
-	.load = virtio_gpu_driver_load,
-	.unload = virtio_gpu_driver_unload,
 	.open = virtio_gpu_driver_open,
 	.postclose = virtio_gpu_driver_postclose,
 

drivers/gpu/drm/virtio/virtgpu_drv.h

@@ -50,9 +50,6 @@
 #define DRIVER_MINOR 1
 #define DRIVER_PATCHLEVEL 0
 
-/* virtgpu_drm_bus.c */
-int drm_virtio_init(struct drm_driver *driver, struct virtio_device *vdev);
-
 struct virtio_gpu_object {
 	struct drm_gem_object gem_base;
 	uint32_t hw_res_handle;
@@ -209,8 +206,8 @@ struct virtio_gpu_fpriv {
 extern struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS];
 
 /* virtio_kms.c */
-int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags);
+int virtio_gpu_init(struct drm_device *dev);
-void virtio_gpu_driver_unload(struct drm_device *dev);
+void virtio_gpu_deinit(struct drm_device *dev);
 int virtio_gpu_driver_open(struct drm_device *dev, struct drm_file *file);
 void virtio_gpu_driver_postclose(struct drm_device *dev, struct drm_file *file);
 
@@ -320,7 +317,7 @@ int virtio_gpu_framebuffer_init(struct drm_device *dev,
 				struct virtio_gpu_framebuffer *vgfb,
 				const struct drm_mode_fb_cmd2 *mode_cmd,
 				struct drm_gem_object *obj);
-int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev);
+void virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev);
 void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev);
 
 /* virtio_gpu_plane.c */

drivers/gpu/drm/virtio/virtgpu_kms.c

@@ -106,7 +106,7 @@ static void virtio_gpu_get_capsets(struct virtio_gpu_device *vgdev,
 	vgdev->num_capsets = num_capsets;
 }
 
-int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags)
+int virtio_gpu_init(struct drm_device *dev)
 {
 	static vq_callback_t *callbacks[] = {
 		virtio_gpu_ctrl_ack, virtio_gpu_cursor_ack
@@ -193,9 +193,7 @@ int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags)
 		     num_capsets, &num_capsets);
 	DRM_INFO("number of cap sets: %d\n", num_capsets);
 
-	ret = virtio_gpu_modeset_init(vgdev);
+	virtio_gpu_modeset_init(vgdev);
-	if (ret)
-		goto err_modeset;
 
 	virtio_device_ready(vgdev->vdev);
 	vgdev->vqs_ready = true;
@@ -209,7 +207,6 @@ int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags)
 			   5 * HZ);
 	return 0;
 
-err_modeset:
 err_scanouts:
 	virtio_gpu_ttm_fini(vgdev);
 err_ttm:
@@ -231,7 +228,7 @@ static void virtio_gpu_cleanup_cap_cache(struct virtio_gpu_device *vgdev)
 	}
 }
 
-void virtio_gpu_driver_unload(struct drm_device *dev)
+void virtio_gpu_deinit(struct drm_device *dev)
 {
 	struct virtio_gpu_device *vgdev = dev->dev_private;