From patchwork Mon Jun 18 14:17:35 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Noralf_Tr=C3=B8nnes?= X-Patchwork-Id: 10471647 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 2619B60532 for ; Mon, 18 Jun 2018 14:18:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 170E0286DF for ; Mon, 18 Jun 2018 14:18:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0B9C3289FF; Mon, 18 Jun 2018 14:18:14 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 5C44F286DF for ; Mon, 18 Jun 2018 14:18:13 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0E4BF6E451; Mon, 18 Jun 2018 14:18:06 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from smtp.domeneshop.no (smtp.domeneshop.no [IPv6:2a01:5b40:0:3005::1]) by gabe.freedesktop.org (Postfix) with ESMTPS id E28936E451; Mon, 18 Jun 2018 14:18:03 +0000 (UTC) Received: from 211.81-166-168.customer.lyse.net ([81.166.168.211]:48974 helo=localhost.localdomain) by smtp.domeneshop.no with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_CBC_SHA256:128) (Exim 4.84_2) (envelope-from ) id 1fUuyn-00035v-LF; Mon, 18 Jun 2018 16:18:01 +0200 From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= To: dri-devel@lists.freedesktop.org Date: Mon, 18 Jun 2018 16:17:35 +0200 Message-Id: <20180618141739.48151-9-noralf@tronnes.org> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20180618141739.48151-1-noralf@tronnes.org> References: <20180618141739.48151-1-noralf@tronnes.org> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v2 08/12] drm/client: Add client callbacks X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= , laurent.pinchart@ideasonboard.com Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP Add client callbacks and hook them up. Add a list of clients per drm_device. Signed-off-by: Noralf Trønnes --- Changes since version 1: - Remove unused functions - Change name drm_client_funcs.lastclose -> .restore - Change name drm_client_funcs.remove -> .unregister - Rework unregister code drivers/gpu/drm/drm_client.c | 97 +++++++++++++++++++++++++++++++++++-- drivers/gpu/drm/drm_drv.c | 7 +++ drivers/gpu/drm/drm_fb_cma_helper.c | 2 +- drivers/gpu/drm/drm_file.c | 3 ++ drivers/gpu/drm/drm_probe_helper.c | 3 ++ include/drm/drm_client.h | 69 +++++++++++++++++++++++++- include/drm/drm_device.h | 14 ++++++ 7 files changed, 190 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c index 98dda40f5416..f1dc04d641cc 100644 --- a/drivers/gpu/drm/drm_client.c +++ b/drivers/gpu/drm/drm_client.c @@ -74,6 +74,7 @@ EXPORT_SYMBOL(drm_client_close); * @dev: DRM device * @client: DRM client * @name: Client name + * @funcs: DRM client functions (optional) * * Use drm_client_put() to free the client. * @@ -81,8 +82,9 @@ EXPORT_SYMBOL(drm_client_close); * Zero on success or negative error code on failure. */ int drm_client_new(struct drm_device *dev, struct drm_client_dev *client, - const char *name) + const char *name, const struct drm_client_funcs *funcs) { + bool registered; int ret; if (!drm_core_check_feature(dev, DRIVER_MODESET) || @@ -91,12 +93,23 @@ int drm_client_new(struct drm_device *dev, struct drm_client_dev *client, client->dev = dev; client->name = name; + client->funcs = funcs; kref_init(&client->ref); ret = drm_client_open(client); if (ret) return ret; + mutex_lock(&dev->clientlist_mutex); + registered = dev->registered; + if (registered) + list_add(&client->list, &dev->clientlist); + mutex_unlock(&dev->clientlist_mutex); + if (!registered) { + drm_client_close(client); + return -ENODEV; + } + drm_dev_get(dev); return 0; @@ -110,8 +123,17 @@ static void drm_client_release(struct kref *ref) DRM_DEV_DEBUG_KMS(dev->dev, "%s\n", client->name); - drm_client_close(client); - kfree(client); + mutex_lock(&dev->clientlist_mutex); + if (!list_empty(&client->list)) + list_del(&client->list); + mutex_unlock(&dev->clientlist_mutex); + + if (client->funcs && client->funcs->release) { + client->funcs->release(client); + } else { + drm_client_close(client); + kfree(client); + } drm_dev_put(dev); } @@ -145,6 +167,75 @@ void drm_client_put(struct drm_client_dev *client) } EXPORT_SYMBOL(drm_client_put); +void drm_client_dev_unregister(struct drm_device *dev) +{ + struct drm_client_dev *client, *iter; + + if (!drm_core_check_feature(dev, DRIVER_MODESET)) + return; + + do { + client = NULL; + mutex_lock(&dev->clientlist_mutex); + list_for_each_entry(iter, &dev->clientlist, list) { + list_del_init(&iter->list); + if (iter->funcs && iter->funcs->unregister) { + /* Make sure a release has not begun */ + if (kref_get_unless_zero(&iter->ref)) { + client = iter; + break; + } + } + } + mutex_unlock(&dev->clientlist_mutex); + if (client) { + client->funcs->unregister(client); + drm_client_put(client); + } + } while (client); +} + +void drm_client_dev_hotplug(struct drm_device *dev) +{ + struct drm_client_dev *client; + int ret; + + if (!drm_core_check_feature(dev, DRIVER_MODESET)) + return; + + mutex_lock(&dev->clientlist_mutex); + list_for_each_entry(client, &dev->clientlist, list) { + if (!client->funcs || !client->funcs->hotplug) + continue; + + ret = client->funcs->hotplug(client); + DRM_DEV_DEBUG_KMS(dev->dev, "%s: ret=%d\n", client->name, ret); + } + 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; + + 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_DEV_DEBUG_KMS(dev->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); +} + static void drm_client_buffer_delete(struct drm_client_buffer *buffer) { struct drm_device *dev; diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index 67ac793a7108..00172a3da62c 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -34,6 +34,7 @@ #include #include +#include #include #include @@ -506,6 +507,7 @@ int drm_dev_init(struct drm_device *dev, INIT_LIST_HEAD(&dev->filelist); INIT_LIST_HEAD(&dev->filelist_internal); + INIT_LIST_HEAD(&dev->clientlist); INIT_LIST_HEAD(&dev->ctxlist); INIT_LIST_HEAD(&dev->vmalist); INIT_LIST_HEAD(&dev->maplist); @@ -515,6 +517,7 @@ int drm_dev_init(struct drm_device *dev, spin_lock_init(&dev->event_lock); mutex_init(&dev->struct_mutex); mutex_init(&dev->filelist_mutex); + mutex_init(&dev->clientlist_mutex); mutex_init(&dev->ctxlist_mutex); mutex_init(&dev->master_mutex); @@ -570,6 +573,7 @@ int drm_dev_init(struct drm_device *dev, err_free: mutex_destroy(&dev->master_mutex); mutex_destroy(&dev->ctxlist_mutex); + mutex_destroy(&dev->clientlist_mutex); mutex_destroy(&dev->filelist_mutex); mutex_destroy(&dev->struct_mutex); return ret; @@ -604,6 +608,7 @@ void drm_dev_fini(struct drm_device *dev) mutex_destroy(&dev->master_mutex); mutex_destroy(&dev->ctxlist_mutex); + mutex_destroy(&dev->clientlist_mutex); mutex_destroy(&dev->filelist_mutex); mutex_destroy(&dev->struct_mutex); kfree(dev->unique); @@ -859,6 +864,8 @@ void drm_dev_unregister(struct drm_device *dev) dev->registered = false; + drm_client_dev_unregister(dev); + if (drm_core_check_feature(dev, DRIVER_MODESET)) drm_modeset_unregister_all(dev); diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c b/drivers/gpu/drm/drm_fb_cma_helper.c index dbd1933160d1..31831a7a6a99 100644 --- a/drivers/gpu/drm/drm_fb_cma_helper.c +++ b/drivers/gpu/drm/drm_fb_cma_helper.c @@ -182,7 +182,7 @@ struct drm_fbdev_cma *drm_fbdev_cma_init(struct drm_device *dev, fb_helper = &fbdev_cma->fb_helper; - ret = drm_client_new(dev, &fb_helper->client, "fbdev"); + ret = drm_client_new(dev, &fb_helper->client, "fbdev", NULL); if (ret) goto err_free; diff --git a/drivers/gpu/drm/drm_file.c b/drivers/gpu/drm/drm_file.c index 55505378df47..06e409007495 100644 --- a/drivers/gpu/drm/drm_file.c +++ b/drivers/gpu/drm/drm_file.c @@ -35,6 +35,7 @@ #include #include +#include #include #include @@ -443,6 +444,8 @@ void drm_lastclose(struct drm_device * dev) if (drm_core_check_feature(dev, DRIVER_LEGACY)) drm_legacy_dev_reinit(dev); + + drm_client_dev_restore(dev); } /** diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c index 527743394150..26be57e28a9d 100644 --- a/drivers/gpu/drm/drm_probe_helper.c +++ b/drivers/gpu/drm/drm_probe_helper.c @@ -33,6 +33,7 @@ #include #include +#include #include #include #include @@ -563,6 +564,8 @@ void drm_kms_helper_hotplug_event(struct drm_device *dev) drm_sysfs_hotplug_event(dev); if (dev->mode_config.funcs->output_poll_changed) dev->mode_config.funcs->output_poll_changed(dev); + + drm_client_dev_hotplug(dev); } EXPORT_SYMBOL(drm_kms_helper_hotplug_event); diff --git a/include/drm/drm_client.h b/include/drm/drm_client.h index 12ac2615b17d..80fe21c86f69 100644 --- a/include/drm/drm_client.h +++ b/include/drm/drm_client.h @@ -6,11 +6,61 @@ #include #include +struct drm_client_dev; struct drm_device; struct drm_framebuffer; struct drm_gem_object; struct drm_minor; +/** + * struct drm_client_funcs - DRM client callbacks + */ +struct drm_client_funcs { + /** + * @release: + * + * Called when the reference count is dropped to zero. Users of this + * callback is responsible for calling drm_client_close() and freeing + * the client structure. + * + * This callback is optional. + */ + void (*release)(struct drm_client_dev *client); + + /** + * @unregister: + * + * Called when &drm_device is unregistered. The client should respond by + * releasing it's resources using drm_client_put(). If it can't do so + * due to resoruces being tied up, like fbdev with open file handles, + * it should release it's resources as soon as possible. + * + * This callback is optional. + */ + void (*unregister)(struct drm_client_dev *client); + + /** + * @restore: + * + * Called on drm_lastclose(). The first client instance in the list that + * returns zero gets the privilege to restore and no more clients are + * called. This callback is not called after @unregister has been called. + * + * This callback is optional. + */ + int (*restore)(struct drm_client_dev *client); + + /** + * @hotplug: + * + * Called on drm_kms_helper_hotplug_event(). + * This callback is not called after @unregister has been called. + * + * This callback is optional. + */ + int (*hotplug)(struct drm_client_dev *client); +}; + /** * struct drm_client_dev - DRM client instance */ @@ -33,6 +83,19 @@ struct drm_client_dev { */ struct kref ref; + /** + * @list: + * + * List of all clients of a DRM device, linked into + * &drm_device.clientlist. Protected by &drm_device.clientlist_mutex. + */ + struct list_head list; + + /** + * @funcs: DRM client functions (optional) + */ + const struct drm_client_funcs *funcs; + /** * @file: DRM file */ @@ -41,10 +104,14 @@ struct drm_client_dev { void drm_client_close(struct drm_client_dev *client); int drm_client_new(struct drm_device *dev, struct drm_client_dev *client, - const char *name); + const char *name, const struct drm_client_funcs *funcs); void drm_client_get(struct drm_client_dev *client); void drm_client_put(struct drm_client_dev *client); +void drm_client_dev_unregister(struct drm_device *dev); +void drm_client_dev_hotplug(struct drm_device *dev); +void drm_client_dev_restore(struct drm_device *dev); + /** * struct drm_client_buffer - DRM client buffer */ diff --git a/include/drm/drm_device.h b/include/drm/drm_device.h index 9e29976d4e98..f9c6e0e3aec7 100644 --- a/include/drm/drm_device.h +++ b/include/drm/drm_device.h @@ -81,6 +81,20 @@ struct drm_device { */ struct list_head filelist_internal; + /** + * @clientlist_mutex: + * + * Protects @clientlist access. + */ + struct mutex clientlist_mutex; + + /** + * @clientlist: + * + * List of in-kernel clients. Protected by @clientlist_mutex. + */ + struct list_head clientlist; + /** \name Memory management */ /*@{ */ struct list_head maplist; /**< Linked list of regions */