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[91.14.162.231]) by smtp.gmail.com with ESMTPSA id ja19-20020a170907989300b008cf8c6f5c43sm3519895ejc.83.2023.03.16.01.20.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Mar 2023 01:20:45 -0700 (PDT) From: " =?utf-8?q?Christian_K=C3=B6nig?= " X-Google-Original-From: =?utf-8?q?Christian_K=C3=B6nig?= To: mcanal@igalia.com, stanislaw.gruszka@linux.intel.com, ogabbay@kernel.org, quic_jhugo@quicinc.com, daniel@ffwll.ch, jani.nikula@linux.intel.com, mwen@igalia.com, maxime@cerno.tech, wambui.karugax@gmail.com, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH 6/7] drm/debugfs: rework drm_debugfs_create_files implementation Date: Thu, 16 Mar 2023 09:20:34 +0100 Message-Id: <20230316082035.567520-7-christian.koenig@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230316082035.567520-1-christian.koenig@amd.com> References: <20230316082035.567520-1-christian.koenig@amd.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Use managed memory allocation for this. That allows us to not keep track of all the files any more. Signed-off-by: Christian König --- drivers/accel/drm_accel.c | 2 - drivers/gpu/drm/drm_debugfs.c | 75 +++++++++------------------------- drivers/gpu/drm/drm_drv.c | 2 - drivers/gpu/drm/drm_internal.h | 5 --- drivers/gpu/drm/tegra/dc.c | 9 +++- drivers/gpu/drm/tegra/dsi.c | 1 + drivers/gpu/drm/tegra/hdmi.c | 3 +- drivers/gpu/drm/tegra/sor.c | 1 + include/drm/drm_debugfs.h | 4 +- include/drm/drm_file.h | 4 -- 10 files changed, 34 insertions(+), 72 deletions(-) diff --git a/drivers/accel/drm_accel.c b/drivers/accel/drm_accel.c index e28fb64cbd5e..82c54bc2dcad 100644 --- a/drivers/accel/drm_accel.c +++ b/drivers/accel/drm_accel.c @@ -100,8 +100,6 @@ void accel_debugfs_register(struct drm_device *dev) { struct drm_minor *minor = dev->accel; - INIT_LIST_HEAD(&minor->debugfs_list); - mutex_init(&minor->debugfs_lock); minor->debugfs_root = dev->debugfs_root; drm_debugfs_create_files(accel_debugfs_list, ACCEL_DEBUGFS_ENTRIES, diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c index 253828133c8c..ee5882f0d335 100644 --- a/drivers/gpu/drm/drm_debugfs.c +++ b/drivers/gpu/drm/drm_debugfs.c @@ -201,7 +201,7 @@ void drm_debugfs_create_files(const struct drm_info_list *files, int count, if (features && !drm_core_check_all_features(dev, features)) continue; - tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL); + tmp = drmm_kzalloc(dev, sizeof(*tmp), GFP_KERNEL); if (tmp == NULL) continue; @@ -210,14 +210,28 @@ void drm_debugfs_create_files(const struct drm_info_list *files, int count, 0444, root, tmp, &drm_debugfs_fops); tmp->info_ent = &files[i]; - - mutex_lock(&minor->debugfs_lock); - list_add(&tmp->list, &minor->debugfs_list); - mutex_unlock(&minor->debugfs_lock); } } EXPORT_SYMBOL(drm_debugfs_create_files); +int drm_debugfs_remove_files(const struct drm_info_list *files, int count, + struct dentry *root, struct drm_minor *minor) +{ + int i; + + for (i = 0; i < count; i++) { + struct dentry *dent = debugfs_lookup(files[i].name, root); + + if (!dent) + continue; + + drmm_kfree(minor->dev, d_inode(dent)->i_private); + debugfs_remove(dent); + } + return 0; +} +EXPORT_SYMBOL(drm_debugfs_remove_files); + void drm_debugfs_dev_init(struct drm_device *dev, struct dentry *root) { dev->debugfs_root = debugfs_create_dir(dev->unique, root); @@ -247,11 +261,8 @@ int drm_debugfs_register(struct drm_minor *minor, int minor_id, struct drm_device *dev = minor->dev; char name[64]; - INIT_LIST_HEAD(&minor->debugfs_list); - mutex_init(&minor->debugfs_lock); sprintf(name, "%d", minor_id); - minor->debugfs_symlink = debugfs_create_symlink(name, root, - dev->unique); + debugfs_create_symlink(name, root, dev->unique); /* TODO: Only for compatibility with drivers */ minor->debugfs_root = dev->debugfs_root; @@ -262,52 +273,6 @@ int drm_debugfs_register(struct drm_minor *minor, int minor_id, return 0; } -int drm_debugfs_remove_files(const struct drm_info_list *files, int count, - struct drm_minor *minor) -{ - struct list_head *pos, *q; - struct drm_info_node *tmp; - int i; - - mutex_lock(&minor->debugfs_lock); - for (i = 0; i < count; i++) { - list_for_each_safe(pos, q, &minor->debugfs_list) { - tmp = list_entry(pos, struct drm_info_node, list); - if (tmp->info_ent == &files[i]) { - debugfs_remove(tmp->dent); - list_del(pos); - kfree(tmp); - } - } - } - mutex_unlock(&minor->debugfs_lock); - return 0; -} -EXPORT_SYMBOL(drm_debugfs_remove_files); - -static void drm_debugfs_remove_all_files(struct drm_minor *minor) -{ - struct drm_info_node *node, *tmp; - - mutex_lock(&minor->debugfs_lock); - list_for_each_entry_safe(node, tmp, &minor->debugfs_list, list) { - debugfs_remove(node->dent); - list_del(&node->list); - kfree(node); - } - mutex_unlock(&minor->debugfs_lock); -} - -void drm_debugfs_cleanup(struct drm_minor *minor) -{ - if (!minor->debugfs_symlink) - return; - - drm_debugfs_remove_all_files(minor); - debugfs_remove(minor->debugfs_symlink); - minor->debugfs_symlink = NULL; -} - /** * drm_debugfs_add_file - Add a given file to the DRM device debugfs file list * @dev: drm device for the ioctl diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index f928b4490ece..9466349769fa 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -198,7 +198,6 @@ static int drm_minor_register(struct drm_device *dev, unsigned int type) return 0; err_debugfs: - drm_debugfs_cleanup(minor); return ret; } @@ -222,7 +221,6 @@ static void drm_minor_unregister(struct drm_device *dev, unsigned int type) device_del(minor->kdev); dev_set_drvdata(minor->kdev, NULL); /* safety belt */ - drm_debugfs_cleanup(minor); } /* diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h index c7f967c0f152..fac86d1998e1 100644 --- a/drivers/gpu/drm/drm_internal.h +++ b/drivers/gpu/drm/drm_internal.h @@ -184,7 +184,6 @@ void drm_debugfs_dev_fini(struct drm_device *dev); void drm_debugfs_dev_register(struct drm_device *dev); int drm_debugfs_register(struct drm_minor *minor, int minor_id, struct dentry *root); -void drm_debugfs_cleanup(struct drm_minor *minor); void drm_debugfs_connector_add(struct drm_connector *connector); void drm_debugfs_connector_remove(struct drm_connector *connector); void drm_debugfs_crtc_add(struct drm_crtc *crtc); @@ -201,10 +200,6 @@ static inline int drm_debugfs_register(struct drm_minor *minor, int minor_id, return 0; } -static inline void drm_debugfs_cleanup(struct drm_minor *minor) -{ -} - static inline void drm_debugfs_connector_add(struct drm_connector *connector) { } diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c index a67453cee883..e53d1b88dc99 100644 --- a/drivers/gpu/drm/tegra/dc.c +++ b/drivers/gpu/drm/tegra/dc.c @@ -1745,8 +1745,15 @@ static void tegra_dc_early_unregister(struct drm_crtc *crtc) unsigned int count = ARRAY_SIZE(debugfs_files); struct drm_minor *minor = crtc->dev->primary; struct tegra_dc *dc = to_tegra_dc(crtc); + struct dentry *root; + +#ifdef CONFIG_DEBUG_FS + root = crtc->debugfs_entry; +#else + root = NULL; +#endif - drm_debugfs_remove_files(dc->debugfs_files, count, minor); + drm_debugfs_remove_files(dc->debugfs_files, count, root, minor); kfree(dc->debugfs_files); dc->debugfs_files = NULL; } diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c index de1333dc0d86..90c6782a663c 100644 --- a/drivers/gpu/drm/tegra/dsi.c +++ b/drivers/gpu/drm/tegra/dsi.c @@ -256,6 +256,7 @@ static void tegra_dsi_early_unregister(struct drm_connector *connector) struct tegra_dsi *dsi = to_dsi(output); drm_debugfs_remove_files(dsi->debugfs_files, count, + connector->debugfs_entry, connector->dev->primary); kfree(dsi->debugfs_files); dsi->debugfs_files = NULL; diff --git a/drivers/gpu/drm/tegra/hdmi.c b/drivers/gpu/drm/tegra/hdmi.c index 40ec3e6cf204..53387aa8b147 100644 --- a/drivers/gpu/drm/tegra/hdmi.c +++ b/drivers/gpu/drm/tegra/hdmi.c @@ -1114,7 +1114,8 @@ static void tegra_hdmi_early_unregister(struct drm_connector *connector) unsigned int count = ARRAY_SIZE(debugfs_files); struct tegra_hdmi *hdmi = to_hdmi(output); - drm_debugfs_remove_files(hdmi->debugfs_files, count, minor); + drm_debugfs_remove_files(hdmi->debugfs_files, count, + connector->debugfs_entry, minor); kfree(hdmi->debugfs_files); hdmi->debugfs_files = NULL; } diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c index 8af632740673..cd286a5c2a9f 100644 --- a/drivers/gpu/drm/tegra/sor.c +++ b/drivers/gpu/drm/tegra/sor.c @@ -1707,6 +1707,7 @@ static void tegra_sor_early_unregister(struct drm_connector *connector) struct tegra_sor *sor = to_sor(output); drm_debugfs_remove_files(sor->debugfs_files, count, + connector->debugfs_entry, connector->dev->primary); kfree(sor->debugfs_files); sor->debugfs_files = NULL; diff --git a/include/drm/drm_debugfs.h b/include/drm/drm_debugfs.h index 7616f457ce70..84ee27dc2317 100644 --- a/include/drm/drm_debugfs.h +++ b/include/drm/drm_debugfs.h @@ -126,8 +126,8 @@ struct drm_debugfs_entry { void drm_debugfs_create_files(const struct drm_info_list *files, int count, struct dentry *root, struct drm_minor *minor); -int drm_debugfs_remove_files(const struct drm_info_list *files, - int count, struct drm_minor *minor); +int drm_debugfs_remove_files(const struct drm_info_list *files, int count, + struct dentry *root, struct drm_minor *minor); void drm_debugfs_add_file(struct drm_device *dev, const char *name, int (*show)(struct seq_file*, void*), void *data); diff --git a/include/drm/drm_file.h b/include/drm/drm_file.h index 688ae56f3800..04d5ece63073 100644 --- a/include/drm/drm_file.h +++ b/include/drm/drm_file.h @@ -78,11 +78,7 @@ struct drm_minor { struct device *kdev; /* Linux device */ struct drm_device *dev; - struct dentry *debugfs_symlink; struct dentry *debugfs_root; - - struct list_head debugfs_list; - struct mutex debugfs_lock; /* Protects debugfs_list. */ }; /**