1 files changed, 95 insertions, 244 deletions

diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c
index 2803ac111bbd..a82d741e6630 100644
--- a/drivers/gpu/drm/drm_client.c
+++ b/drivers/gpu/drm/drm_client.c
@@ -3,6 +3,7 @@
  * Copyright 2018 Noralf Trønnes
  */
 
+#include <linux/export.h>
 #include <linux/iosys-map.h>
 #include <linux/list.h>
 #include <linux/mutex.h>
@@ -10,13 +11,14 @@
 #include <linux/slab.h>
 
 #include <drm/drm_client.h>
-#include <drm/drm_debugfs.h>
+#include <drm/drm_client_event.h>
 #include <drm/drm_device.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_file.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_framebuffer.h>
 #include <drm/drm_gem.h>
+#include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_mode.h>
 #include <drm/drm_print.h>
 
@@ -168,122 +170,59 @@ void drm_client_release(struct drm_client_dev *client)
 
 	drm_client_modeset_free(client);
 	drm_client_close(client);
-	drm_dev_put(dev);
-}
-EXPORT_SYMBOL(drm_client_release);
 
-/**
- * drm_client_dev_unregister - Unregister clients
- * @dev: DRM device
- *
- * This function releases all clients by calling each client's
- * &drm_client_funcs.unregister callback. The callback function
- * is responsibe for releaseing all resources including the client
- * itself.
- *
- * The helper drm_dev_unregister() calls this function. Drivers
- * that use it don't need to call this function themselves.
- */
-void drm_client_dev_unregister(struct drm_device *dev)
-{
-	struct drm_client_dev *client, *tmp;
+	if (client->funcs && client->funcs->free)
+		client->funcs->free(client);
 
-	if (!drm_core_check_feature(dev, DRIVER_MODESET))
-		return;
-
-	mutex_lock(&dev->clientlist_mutex);
-	list_for_each_entry_safe(client, tmp, &dev->clientlist, list) {
-		list_del(&client->list);
-		if (client->funcs && client->funcs->unregister) {
-			client->funcs->unregister(client);
-		} else {
-			drm_client_release(client);
-			kfree(client);
-		}
-	}
-	mutex_unlock(&dev->clientlist_mutex);
+	drm_dev_put(dev);
 }
-EXPORT_SYMBOL(drm_client_dev_unregister);
+EXPORT_SYMBOL(drm_client_release);
 
 /**
- * drm_client_dev_hotplug - Send hotplug event to clients
- * @dev: DRM device
- *
- * This function calls the &drm_client_funcs.hotplug callback on the attached clients.
- *
- * drm_kms_helper_hotplug_event() calls this function, so drivers that use it
- * don't need to call this function themselves.
+ * drm_client_buffer_delete - Delete a client buffer
+ * @buffer: DRM client buffer
  */
-void drm_client_dev_hotplug(struct drm_device *dev)
+void drm_client_buffer_delete(struct drm_client_buffer *buffer)
 {
-	struct drm_client_dev *client;
+	struct drm_gem_object *gem;
 	int ret;
 
-	if (!drm_core_check_feature(dev, DRIVER_MODESET))
-		return;
-
-	if (!dev->mode_config.num_connector) {
-		drm_dbg_kms(dev, "No connectors found, will not send hotplug events!\n");
+	if (!buffer)
 		return;
-	}
-
-	mutex_lock(&dev->clientlist_mutex);
-	list_for_each_entry(client, &dev->clientlist, list) {
-		if (!client->funcs || !client->funcs->hotplug)
-			continue;
-
-		if (client->hotplug_failed)
-			continue;
-
-		ret = client->funcs->hotplug(client);
-		drm_dbg_kms(dev, "%s: ret=%d\n", client->name, ret);
-		if (ret)
-			client->hotplug_failed = true;
-	}
-	mutex_unlock(&dev->clientlist_mutex);
-}
-EXPORT_SYMBOL(drm_client_dev_hotplug);
 
-void drm_client_dev_restore(struct drm_device *dev)
-{
-	struct drm_client_dev *client;
-	int ret;
-
-	if (!drm_core_check_feature(dev, DRIVER_MODESET))
-		return;
+	gem = buffer->fb->obj[0];
+	drm_gem_vunmap(gem, &buffer->map);
 
-	mutex_lock(&dev->clientlist_mutex);
-	list_for_each_entry(client, &dev->clientlist, list) {
-		if (!client->funcs || !client->funcs->restore)
-			continue;
-
-		ret = client->funcs->restore(client);
-		drm_dbg_kms(dev, "%s: ret=%d\n", client->name, ret);
-		if (!ret) /* The first one to return zero gets the privilege to restore */
-			break;
-	}
-	mutex_unlock(&dev->clientlist_mutex);
-}
+	ret = drm_mode_rmfb(buffer->client->dev, buffer->fb->base.id, buffer->client->file);
+	if (ret)
+		drm_err(buffer->client->dev,
+			"Error removing FB:%u (%d)\n", buffer->fb->base.id, ret);
 
-static void drm_client_buffer_delete(struct drm_client_buffer *buffer)
-{
-	if (buffer->gem) {
-		drm_gem_vunmap_unlocked(buffer->gem, &buffer->map);
-		drm_gem_object_put(buffer->gem);
-	}
+	drm_gem_object_put(buffer->gem);
 
 	kfree(buffer);
 }
+EXPORT_SYMBOL(drm_client_buffer_delete);
 
 static struct drm_client_buffer *
 drm_client_buffer_create(struct drm_client_dev *client, u32 width, u32 height,
-			 u32 format, u32 *handle)
+			 u32 format, u32 handle, u32 pitch)
 {
-	const struct drm_format_info *info = drm_format_info(format);
-	struct drm_mode_create_dumb dumb_args = { };
+	struct drm_mode_fb_cmd2 fb_req = {
+		.width = width,
+		.height = height,
+		.pixel_format = format,
+		.handles = {
+			handle,
+		},
+		.pitches = {
+			pitch,
+		},
+	};
 	struct drm_device *dev = client->dev;
 	struct drm_client_buffer *buffer;
 	struct drm_gem_object *obj;
+	struct drm_framebuffer *fb;
 	int ret;
 
 	buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
@@ -292,28 +231,38 @@ drm_client_buffer_create(struct drm_client_dev *client, u32 width, u32 height,
 
 	buffer->client = client;
 
-	dumb_args.width = width;
-	dumb_args.height = height;
-	dumb_args.bpp = drm_format_info_bpp(info, 0);
-	ret = drm_mode_create_dumb(dev, &dumb_args, client->file);
-	if (ret)
-		goto err_delete;
-
-	obj = drm_gem_object_lookup(client->file, dumb_args.handle);
+	obj = drm_gem_object_lookup(client->file, handle);
 	if (!obj)  {
 		ret = -ENOENT;
 		goto err_delete;
 	}
 
-	buffer->pitch = dumb_args.pitch;
+	ret = drm_mode_addfb2(dev, &fb_req, client->file);
+	if (ret)
+		goto err_drm_gem_object_put;
+
+	fb = drm_framebuffer_lookup(dev, client->file, fb_req.fb_id);
+	if (drm_WARN_ON(dev, !fb)) {
+		ret = -ENOENT;
+		goto err_drm_mode_rmfb;
+	}
+
+	/* drop the reference we picked up in framebuffer lookup */
+	drm_framebuffer_put(fb);
+
+	strscpy(fb->comm, client->name, TASK_COMM_LEN);
+
 	buffer->gem = obj;
-	*handle = dumb_args.handle;
+	buffer->fb = fb;
 
 	return buffer;
 
+err_drm_mode_rmfb:
+	drm_mode_rmfb(dev, fb_req.fb_id, client->file);
+err_drm_gem_object_put:
+	drm_gem_object_put(obj);
 err_delete:
-	drm_client_buffer_delete(buffer);
-
+	kfree(buffer);
 	return ERR_PTR(ret);
 }
 
@@ -340,13 +289,13 @@ err_delete:
 int drm_client_buffer_vmap_local(struct drm_client_buffer *buffer,
 				 struct iosys_map *map_copy)
 {
-	struct drm_gem_object *gem = buffer->gem;
+	struct drm_gem_object *gem = buffer->fb->obj[0];
 	struct iosys_map *map = &buffer->map;
 	int ret;
 
 	drm_gem_lock(gem);
 
-	ret = drm_gem_vmap(gem, map);
+	ret = drm_gem_vmap_locked(gem, map);
 	if (ret)
 		goto err_drm_gem_vmap_unlocked;
 	*map_copy = *map;
@@ -355,7 +304,7 @@ int drm_client_buffer_vmap_local(struct drm_client_buffer *buffer,
 
 err_drm_gem_vmap_unlocked:
 	drm_gem_unlock(gem);
-	return 0;
+	return ret;
 }
 EXPORT_SYMBOL(drm_client_buffer_vmap_local);
 
@@ -369,10 +318,10 @@ EXPORT_SYMBOL(drm_client_buffer_vmap_local);
  */
 void drm_client_buffer_vunmap_local(struct drm_client_buffer *buffer)
 {
-	struct drm_gem_object *gem = buffer->gem;
+	struct drm_gem_object *gem = buffer->fb->obj[0];
 	struct iosys_map *map = &buffer->map;
 
-	drm_gem_vunmap(gem, map);
+	drm_gem_vunmap_locked(gem, map);
 	drm_gem_unlock(gem);
 }
 EXPORT_SYMBOL(drm_client_buffer_vunmap_local);
@@ -397,34 +346,18 @@ EXPORT_SYMBOL(drm_client_buffer_vunmap_local);
  * Returns:
  *	0 on success, or a negative errno code otherwise.
  */
-int
-drm_client_buffer_vmap(struct drm_client_buffer *buffer,
-		       struct iosys_map *map_copy)
+int drm_client_buffer_vmap(struct drm_client_buffer *buffer,
+			   struct iosys_map *map_copy)
 {
-	struct drm_gem_object *gem = buffer->gem;
-	struct iosys_map *map = &buffer->map;
+	struct drm_gem_object *gem = buffer->fb->obj[0];
 	int ret;
 
-	drm_gem_lock(gem);
-
-	ret = drm_gem_pin_locked(gem);
+	ret = drm_gem_vmap(gem, &buffer->map);
 	if (ret)
-		goto err_drm_gem_pin_locked;
-	ret = drm_gem_vmap(gem, map);
-	if (ret)
-		goto err_drm_gem_vmap;
-
-	drm_gem_unlock(gem);
-
-	*map_copy = *map;
+		return ret;
+	*map_copy = buffer->map;
 
 	return 0;
-
-err_drm_gem_vmap:
-	drm_gem_unpin_locked(buffer->gem);
-err_drm_gem_pin_locked:
-	drm_gem_unlock(gem);
-	return ret;
 }
 EXPORT_SYMBOL(drm_client_buffer_vmap);
 
@@ -438,63 +371,14 @@ EXPORT_SYMBOL(drm_client_buffer_vmap);
  */
 void drm_client_buffer_vunmap(struct drm_client_buffer *buffer)
 {
-	struct drm_gem_object *gem = buffer->gem;
-	struct iosys_map *map = &buffer->map;
+	struct drm_gem_object *gem = buffer->fb->obj[0];
 
-	drm_gem_lock(gem);
-	drm_gem_vunmap(gem, map);
-	drm_gem_unpin_locked(gem);
-	drm_gem_unlock(gem);
+	drm_gem_vunmap(gem, &buffer->map);
 }
 EXPORT_SYMBOL(drm_client_buffer_vunmap);
 
-static void drm_client_buffer_rmfb(struct drm_client_buffer *buffer)
-{
-	int ret;
-
-	if (!buffer->fb)
-		return;
-
-	ret = drm_mode_rmfb(buffer->client->dev, buffer->fb->base.id, buffer->client->file);
-	if (ret)
-		drm_err(buffer->client->dev,
-			"Error removing FB:%u (%d)\n", buffer->fb->base.id, ret);
-
-	buffer->fb = NULL;
-}
-
-static int drm_client_buffer_addfb(struct drm_client_buffer *buffer,
-				   u32 width, u32 height, u32 format,
-				   u32 handle)
-{
-	struct drm_client_dev *client = buffer->client;
-	struct drm_mode_fb_cmd2 fb_req = { };
-	int ret;
-
-	fb_req.width = width;
-	fb_req.height = height;
-	fb_req.pixel_format = format;
-	fb_req.handles[0] = handle;
-	fb_req.pitches[0] = buffer->pitch;
-
-	ret = drm_mode_addfb2(client->dev, &fb_req, client->file);
-	if (ret)
-		return ret;
-
-	buffer->fb = drm_framebuffer_lookup(client->dev, buffer->client->file, fb_req.fb_id);
-	if (WARN_ON(!buffer->fb))
-		return -ENOENT;
-
-	/* drop the reference we picked up in framebuffer lookup */
-	drm_framebuffer_put(buffer->fb);
-
-	strscpy(buffer->fb->comm, client->name, TASK_COMM_LEN);
-
-	return 0;
-}
-
 /**
- * drm_client_framebuffer_create - Create a client framebuffer
+ * drm_client_buffer_create_dumb - Create a client buffer backed by a dumb buffer
  * @client: DRM client
  * @width: Framebuffer width
  * @height: Framebuffer height
@@ -502,24 +386,33 @@ static int drm_client_buffer_addfb(struct drm_client_buffer *buffer,
  *
  * This function creates a &drm_client_buffer which consists of a
  * &drm_framebuffer backed by a dumb buffer.
- * Call drm_client_framebuffer_delete() to free the buffer.
+ * Call drm_client_buffer_delete() to free the buffer.
  *
  * Returns:
  * Pointer to a client buffer or an error pointer on failure.
  */
 struct drm_client_buffer *
-drm_client_framebuffer_create(struct drm_client_dev *client, u32 width, u32 height, u32 format)
+drm_client_buffer_create_dumb(struct drm_client_dev *client, u32 width, u32 height, u32 format)
 {
+	const struct drm_format_info *info = drm_format_info(format);
+	struct drm_device *dev = client->dev;
+	struct drm_mode_create_dumb dumb_args = { };
 	struct drm_client_buffer *buffer;
-	u32 handle;
 	int ret;
 
-	buffer = drm_client_buffer_create(client, width, height, format,
-					  &handle);
-	if (IS_ERR(buffer))
-		return buffer;
+	dumb_args.width = width;
+	dumb_args.height = height;
+	dumb_args.bpp = drm_format_info_bpp(info, 0);
+	ret = drm_mode_create_dumb(dev, &dumb_args, client->file);
+	if (ret)
+		return ERR_PTR(ret);
 
-	ret = drm_client_buffer_addfb(buffer, width, height, format, handle);
+	buffer = drm_client_buffer_create(client, width, height, format,
+					  dumb_args.handle, dumb_args.pitch);
+	if (IS_ERR(buffer)) {
+		ret = PTR_ERR(buffer);
+		goto err_drm_mode_destroy_dumb;
+	}
 
 	/*
 	 * The handle is only needed for creating the framebuffer, destroy it
@@ -527,34 +420,19 @@ drm_client_framebuffer_create(struct drm_client_dev *client, u32 width, u32 heig
 	 * object as DMA-buf. The framebuffer and our buffer structure are still
 	 * holding references to the GEM object to prevent its destruction.
 	 */
-	drm_mode_destroy_dumb(client->dev, handle, client->file);
-
-	if (ret) {
-		drm_client_buffer_delete(buffer);
-		return ERR_PTR(ret);
-	}
+	drm_mode_destroy_dumb(client->dev, dumb_args.handle, client->file);
 
 	return buffer;
-}
-EXPORT_SYMBOL(drm_client_framebuffer_create);
-
-/**
- * drm_client_framebuffer_delete - Delete a client framebuffer
- * @buffer: DRM client buffer (can be NULL)
- */
-void drm_client_framebuffer_delete(struct drm_client_buffer *buffer)
-{
-	if (!buffer)
-		return;
 
-	drm_client_buffer_rmfb(buffer);
-	drm_client_buffer_delete(buffer);
+err_drm_mode_destroy_dumb:
+	drm_mode_destroy_dumb(client->dev, dumb_args.handle, client->file);
+	return ERR_PTR(ret);
 }
-EXPORT_SYMBOL(drm_client_framebuffer_delete);
+EXPORT_SYMBOL(drm_client_buffer_create_dumb);
 
 /**
- * drm_client_framebuffer_flush - Manually flush client framebuffer
- * @buffer: DRM client buffer (can be NULL)
+ * drm_client_buffer_flush - Manually flush client buffer
+ * @buffer: DRM client buffer
  * @rect: Damage rectangle (if NULL flushes all)
  *
  * This calls &drm_framebuffer_funcs->dirty (if present) to flush buffer changes
@@ -563,7 +441,7 @@ EXPORT_SYMBOL(drm_client_framebuffer_delete);
  * Returns:
  * Zero on success or negative error code on failure.
  */
-int drm_client_framebuffer_flush(struct drm_client_buffer *buffer, struct drm_rect *rect)
+int drm_client_buffer_flush(struct drm_client_buffer *buffer, struct drm_rect *rect)
 {
 	if (!buffer || !buffer->fb || !buffer->fb->funcs->dirty)
 		return 0;
@@ -583,31 +461,4 @@ int drm_client_framebuffer_flush(struct drm_client_buffer *buffer, struct drm_re
 	return buffer->fb->funcs->dirty(buffer->fb, buffer->client->file,
 					0, 0, NULL, 0);
 }
-EXPORT_SYMBOL(drm_client_framebuffer_flush);
-
-#ifdef CONFIG_DEBUG_FS
-static int drm_client_debugfs_internal_clients(struct seq_file *m, void *data)
-{
-	struct drm_debugfs_entry *entry = m->private;
-	struct drm_device *dev = entry->dev;
-	struct drm_printer p = drm_seq_file_printer(m);
-	struct drm_client_dev *client;
-
-	mutex_lock(&dev->clientlist_mutex);
-	list_for_each_entry(client, &dev->clientlist, list)
-		drm_printf(&p, "%s\n", client->name);
-	mutex_unlock(&dev->clientlist_mutex);
-
-	return 0;
-}
-
-static const struct drm_debugfs_info drm_client_debugfs_list[] = {
-	{ "internal_clients", drm_client_debugfs_internal_clients, 0 },
-};
-
-void drm_client_debugfs_init(struct drm_device *dev)
-{
-	drm_debugfs_add_files(dev, drm_client_debugfs_list,
-			      ARRAY_SIZE(drm_client_debugfs_list));
-}
-#endif
+EXPORT_SYMBOL(drm_client_buffer_flush);