From 0e975980d435d58df2d430d688b8c18778b42218 Mon Sep 17 00:00:00 2001 From: Peter Antoine Date: Tue, 23 Jun 2015 08:18:49 +0100 Subject: drm: Turn off Legacy Context Functions The context functions are not used by the i915 driver and should not be used by modeset drivers. These driver functions contain several bugs and security holes. This change makes these functions optional can be turned on by a setting, they are turned off by default for modeset driver with the exception of the nouvea driver that may require them with an old version of libdrm. The previous attempt was commit 7c510133d93dd6f15ca040733ba7b2891ed61fd1 Author: Daniel Vetter Date: Thu Aug 8 15:41:21 2013 +0200 drm: mark context support as a legacy subsystem but this had to be reverted commit c21eb21cb50d58e7cbdcb8b9e7ff68b85cfa5095 Author: Dave Airlie Date: Fri Sep 20 08:32:59 2013 +1000 Revert "drm: mark context support as a legacy subsystem" v2: remove returns from void function, and formatting (Daniel Vetter) v3: - s/Nova/nouveau/ in the commit message, and add references to the previous attempts - drop the part touching the drm hw lock, that should be a separate patch. Signed-off-by: Peter Antoine (v2) Cc: Peter Antoine (v2) Reviewed-by: Peter Antoine Signed-off-by: Daniel Vetter --- drivers/gpu/drm/drm_drv.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) (limited to 'drivers/gpu/drm/drm_drv.c') diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index b7bf4ce8c012..838657503113 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -582,11 +582,14 @@ struct drm_device *drm_dev_alloc(struct drm_driver *driver, if (drm_ht_create(&dev->map_hash, 12)) goto err_minors; - ret = drm_legacy_ctxbitmap_init(dev); - if (ret) { - DRM_ERROR("Cannot allocate memory for context bitmap.\n"); - goto err_ht; - } + if (drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) || + !drm_core_check_feature(dev, DRIVER_MODESET)) + ret = drm_legacy_ctxbitmap_init(dev); + if (ret) { + DRM_ERROR( + "Cannot allocate memory for context bitmap.\n"); + goto err_ht; + } if (drm_core_check_feature(dev, DRIVER_GEM)) { ret = drm_gem_init(dev); -- cgit v1.2.3-70-g09d2 From ba6976c129a571464fccbbcf866f4f93d91113c0 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Tue, 23 Jun 2015 11:22:36 +0200 Subject: drm: Convert drm_legacy_ctxbitmap_init to void return type It can't fail really. Also remove the redundant kms check Peter added. Cc: Peter Antoine Reviewed-by: Peter Antoine Signed-off-by: Daniel Vetter --- drivers/gpu/drm/drm_context.c | 5 ++--- drivers/gpu/drm/drm_drv.c | 10 +--------- drivers/gpu/drm/drm_legacy.h | 2 +- 3 files changed, 4 insertions(+), 13 deletions(-) (limited to 'drivers/gpu/drm/drm_drv.c') diff --git a/drivers/gpu/drm/drm_context.c b/drivers/gpu/drm/drm_context.c index 32958dabd7b0..192a5f9eeb74 100644 --- a/drivers/gpu/drm/drm_context.c +++ b/drivers/gpu/drm/drm_context.c @@ -89,14 +89,13 @@ static int drm_legacy_ctxbitmap_next(struct drm_device * dev) * * Initialise the drm_device::ctx_idr */ -int drm_legacy_ctxbitmap_init(struct drm_device * dev) +void drm_legacy_ctxbitmap_init(struct drm_device * dev) { if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && drm_core_check_feature(dev, DRIVER_MODESET)) - return -EINVAL; + return; idr_init(&dev->ctx_idr); - return 0; } /** diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index 838657503113..9b51fe11ff19 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -582,14 +582,7 @@ struct drm_device *drm_dev_alloc(struct drm_driver *driver, if (drm_ht_create(&dev->map_hash, 12)) goto err_minors; - if (drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) || - !drm_core_check_feature(dev, DRIVER_MODESET)) - ret = drm_legacy_ctxbitmap_init(dev); - if (ret) { - DRM_ERROR( - "Cannot allocate memory for context bitmap.\n"); - goto err_ht; - } + drm_legacy_ctxbitmap_init(dev); if (drm_core_check_feature(dev, DRIVER_GEM)) { ret = drm_gem_init(dev); @@ -603,7 +596,6 @@ struct drm_device *drm_dev_alloc(struct drm_driver *driver, err_ctxbitmap: drm_legacy_ctxbitmap_cleanup(dev); -err_ht: drm_ht_remove(&dev->map_hash); err_minors: drm_minor_free(dev, DRM_MINOR_LEGACY); diff --git a/drivers/gpu/drm/drm_legacy.h b/drivers/gpu/drm/drm_legacy.h index c1dc61473db5..9b731786e4db 100644 --- a/drivers/gpu/drm/drm_legacy.h +++ b/drivers/gpu/drm/drm_legacy.h @@ -42,7 +42,7 @@ struct drm_file; #define DRM_KERNEL_CONTEXT 0 #define DRM_RESERVED_CONTEXTS 1 -int drm_legacy_ctxbitmap_init(struct drm_device *dev); +void drm_legacy_ctxbitmap_init(struct drm_device *dev); void drm_legacy_ctxbitmap_cleanup(struct drm_device *dev); void drm_legacy_ctxbitmap_free(struct drm_device *dev, int ctx_handle); void drm_legacy_ctxbitmap_flush(struct drm_device *dev, struct drm_file *file); -- cgit v1.2.3-70-g09d2 From 3fdefa399e4644399ce3e74e65a75122d52dba6a Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Thu, 9 Jul 2015 23:44:37 +0200 Subject: drm: gc now dead mode_group code Two nice things here: - drm_dev_register will truly register everything in the right order if the driver doesn't have a ->load callback. Before this we had to init the primary mode_group after the device nodes where already registered. - Less things to keep track of when reworking the connector locking, yay! Reviewed-by: Maarten Lankhorst Signed-off-by: Daniel Vetter --- drivers/gpu/drm/drm_crtc.c | 64 ---------------------------------- drivers/gpu/drm/drm_drv.c | 12 ------- drivers/gpu/drm/i915/intel_dp_mst.c | 3 -- drivers/gpu/drm/radeon/radeon_dp_mst.c | 3 -- include/drm/drmP.h | 1 - include/drm/drm_crtc.h | 26 -------------- 6 files changed, 109 deletions(-) (limited to 'drivers/gpu/drm/drm_drv.c') diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 805ef2f408a7..e385014ed616 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -1679,70 +1679,6 @@ int drm_mode_create_suggested_offset_properties(struct drm_device *dev) } EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); -static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group) -{ - uint32_t total_objects = 0; - - total_objects += dev->mode_config.num_crtc; - total_objects += dev->mode_config.num_connector; - total_objects += dev->mode_config.num_encoder; - - group->id_list = kcalloc(total_objects, sizeof(uint32_t), GFP_KERNEL); - if (!group->id_list) - return -ENOMEM; - - group->num_crtcs = 0; - group->num_connectors = 0; - group->num_encoders = 0; - return 0; -} - -void drm_mode_group_destroy(struct drm_mode_group *group) -{ - kfree(group->id_list); - group->id_list = NULL; -} - -/* - * NOTE: Driver's shouldn't ever call drm_mode_group_init_legacy_group - it is - * the drm core's responsibility to set up mode control groups. - */ -int drm_mode_group_init_legacy_group(struct drm_device *dev, - struct drm_mode_group *group) -{ - struct drm_crtc *crtc; - struct drm_encoder *encoder; - struct drm_connector *connector; - int ret; - - ret = drm_mode_group_init(dev, group); - if (ret) - return ret; - - drm_for_each_crtc(crtc, dev) - group->id_list[group->num_crtcs++] = crtc->base.id; - - drm_for_each_encoder(encoder, dev) - group->id_list[group->num_crtcs + group->num_encoders++] = - encoder->base.id; - - drm_for_each_connector(connector, dev) - group->id_list[group->num_crtcs + group->num_encoders + - group->num_connectors++] = connector->base.id; - - return 0; -} -EXPORT_SYMBOL(drm_mode_group_init_legacy_group); - -void drm_reinit_primary_mode_group(struct drm_device *dev) -{ - drm_modeset_lock_all(dev); - drm_mode_group_destroy(&dev->primary->mode_group); - drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group); - drm_modeset_unlock_all(dev); -} -EXPORT_SYMBOL(drm_reinit_primary_mode_group); - /** * drm_mode_getresources - get graphics configuration * @dev: drm device for the ioctl diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index b7bf4ce8c012..f7798c3b543e 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -285,7 +285,6 @@ static void drm_minor_free(struct drm_device *dev, unsigned int type) if (!minor) return; - drm_mode_group_destroy(&minor->mode_group); put_device(minor->kdev); spin_lock_irqsave(&drm_minor_lock, flags); @@ -705,20 +704,9 @@ int drm_dev_register(struct drm_device *dev, unsigned long flags) goto err_minors; } - /* setup grouping for legacy outputs */ - if (drm_core_check_feature(dev, DRIVER_MODESET)) { - ret = drm_mode_group_init_legacy_group(dev, - &dev->primary->mode_group); - if (ret) - goto err_unload; - } - ret = 0; goto out_unlock; -err_unload: - if (dev->driver->unload) - dev->driver->unload(dev); err_minors: drm_minor_unregister(dev, DRM_MINOR_LEGACY); drm_minor_unregister(dev, DRM_MINOR_RENDER); diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c index d0b2569c6241..585f0a45b3f1 100644 --- a/drivers/gpu/drm/i915/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/intel_dp_mst.c @@ -441,7 +441,6 @@ static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topolo drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0); drm_mode_connector_set_path_property(connector, pathprop); - drm_reinit_primary_mode_group(dev); drm_modeset_lock_all(dev); intel_connector_add_to_fbdev(intel_connector); drm_modeset_unlock_all(dev); @@ -466,8 +465,6 @@ static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr, drm_connector_cleanup(connector); drm_modeset_unlock_all(dev); - drm_reinit_primary_mode_group(dev); - kfree(intel_connector); DRM_DEBUG_KMS("\n"); } diff --git a/drivers/gpu/drm/radeon/radeon_dp_mst.c b/drivers/gpu/drm/radeon/radeon_dp_mst.c index e649c8ff20a0..e4fc8f3bf58b 100644 --- a/drivers/gpu/drm/radeon/radeon_dp_mst.c +++ b/drivers/gpu/drm/radeon/radeon_dp_mst.c @@ -284,7 +284,6 @@ static struct drm_connector *radeon_dp_add_mst_connector(struct drm_dp_mst_topol drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0); drm_mode_connector_set_path_property(connector, pathprop); - drm_reinit_primary_mode_group(dev); drm_modeset_lock_all(dev); radeon_fb_add_connector(rdev, connector); @@ -309,8 +308,6 @@ static void radeon_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr, drm_connector_cleanup(connector); drm_modeset_unlock_all(dev); - drm_reinit_primary_mode_group(dev); - kfree(connector); DRM_DEBUG_KMS("\n"); diff --git a/include/drm/drmP.h b/include/drm/drmP.h index 48db6a56975f..c89351ede92c 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -675,7 +675,6 @@ struct drm_minor { /* currently active master for this node. Protected by master_mutex */ struct drm_master *master; - struct drm_mode_group mode_group; }; diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index fe3100115a41..3071319ea194 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -1017,29 +1017,6 @@ struct drm_mode_config_funcs { void (*atomic_state_free)(struct drm_atomic_state *state); }; -/** - * struct drm_mode_group - group of mode setting resources for potential sub-grouping - * @num_crtcs: CRTC count - * @num_encoders: encoder count - * @num_connectors: connector count - * @num_bridges: bridge count - * @id_list: list of KMS object IDs in this group - * - * Currently this simply tracks the global mode setting state. But in the - * future it could allow groups of objects to be set aside into independent - * control groups for use by different user level processes (e.g. two X servers - * running simultaneously on different heads, each with their own mode - * configuration and freedom of mode setting). - */ -struct drm_mode_group { - uint32_t num_crtcs; - uint32_t num_encoders; - uint32_t num_connectors; - - /* list of object IDs for this group */ - uint32_t *id_list; -}; - /** * struct drm_mode_config - Mode configuration control structure * @mutex: mutex protecting KMS related lists and structures @@ -1324,9 +1301,6 @@ extern const char *drm_get_tv_select_name(int val); extern void drm_fb_release(struct drm_file *file_priv); extern void drm_property_destroy_user_blobs(struct drm_device *dev, struct drm_file *file_priv); -extern int drm_mode_group_init_legacy_group(struct drm_device *dev, struct drm_mode_group *group); -extern void drm_mode_group_destroy(struct drm_mode_group *group); -extern void drm_reinit_primary_mode_group(struct drm_device *dev); extern bool drm_probe_ddc(struct i2c_adapter *adapter); extern struct edid *drm_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter); -- cgit v1.2.3-70-g09d2