Following functions are only used internally, not by drivers: - devm_drm_dev_init
Also, now that we have a very slick and polished way to allocate a drm_device with devm_drm_dev_alloc, update all the docs to reflect the new reality. Mostly this consists of deleting old and misleading hints. Two main ones:
- it is no longer required that the drm_device base class is first in the structure. devm_drm_dev_alloc can cope with it being anywhere
- obviously embedded now strongly recommends using devm_drm_dev_alloc
v2: Fix typos (Noralf)
v3: Split out the removal of drm_dev_init, that's blocked on some discussions on how to convert vgem/vkms/i915-selftests. Adjust commit message to reflect that.
Cc: Noralf Trønnes noralf@tronnes.org Acked-by: Noralf Trønnes noralf@tronnes.org (v2) Acked-by: Sam Ravnborg sam@ravnborg.org Cc: Luben Tuikov luben.tuikov@amd.com Cc: amd-gfx@lists.freedesktop.org Signed-off-by: Daniel Vetter daniel.vetter@intel.com --- .../driver-api/driver-model/devres.rst | 2 +- drivers/gpu/drm/drm_drv.c | 78 +++++-------------- drivers/gpu/drm/drm_managed.c | 2 +- include/drm/drm_device.h | 2 +- include/drm/drm_drv.h | 16 ++-- 5 files changed, 30 insertions(+), 70 deletions(-)
diff --git a/Documentation/driver-api/driver-model/devres.rst b/Documentation/driver-api/driver-model/devres.rst index eaaaafc21134..aa4d2420f79e 100644 --- a/Documentation/driver-api/driver-model/devres.rst +++ b/Documentation/driver-api/driver-model/devres.rst @@ -263,7 +263,7 @@ DMA dmam_pool_destroy()
DRM - devm_drm_dev_init() + devm_drm_dev_alloc()
GPIO devm_gpiod_get() diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index d4506f7a234e..7c1689842ec0 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -240,13 +240,13 @@ void drm_minor_release(struct drm_minor *minor) * DOC: driver instance overview * * A device instance for a drm driver is represented by &struct drm_device. This - * is initialized with drm_dev_init(), usually from bus-specific ->probe() - * callbacks implemented by the driver. The driver then needs to initialize all - * the various subsystems for the drm device like memory management, vblank - * handling, modesetting support and intial output configuration plus obviously - * initialize all the corresponding hardware bits. Finally when everything is up - * and running and ready for userspace the device instance can be published - * using drm_dev_register(). + * is allocated and initialized with devm_drm_dev_alloc(), usually from + * bus-specific ->probe() callbacks implemented by the driver. The driver then + * needs to initialize all the various subsystems for the drm device like memory + * management, vblank handling, modesetting support and initial output + * configuration plus obviously initialize all the corresponding hardware bits. + * Finally when everything is up and running and ready for userspace the device + * instance can be published using drm_dev_register(). * * There is also deprecated support for initalizing device instances using * bus-specific helpers and the &drm_driver.load callback. But due to @@ -274,7 +274,7 @@ void drm_minor_release(struct drm_minor *minor) * * The following example shows a typical structure of a DRM display driver. * The example focus on the probe() function and the other functions that is - * almost always present and serves as a demonstration of devm_drm_dev_init(). + * almost always present and serves as a demonstration of devm_drm_dev_alloc(). * * .. code-block:: c * @@ -294,22 +294,12 @@ void drm_minor_release(struct drm_minor *minor) * struct drm_device *drm; * int ret; * - * // devm_kzalloc() can't be used here because the drm_device ' - * // lifetime can exceed the device lifetime if driver unbind - * // happens when userspace still has open file descriptors. - * priv = kzalloc(sizeof(*priv), GFP_KERNEL); - * if (!priv) - * return -ENOMEM; - * + * priv = devm_drm_dev_alloc(&pdev->dev, &driver_drm_driver, + * struct driver_device, drm); + * if (IS_ERR(priv)) + * return PTR_ERR(priv); * drm = &priv->drm; * - * ret = devm_drm_dev_init(&pdev->dev, drm, &driver_drm_driver); - * if (ret) { - * kfree(priv); - * return ret; - * } - * drmm_add_final_kfree(drm, priv); - * * ret = drmm_mode_config_init(drm); * if (ret) * return ret; @@ -550,9 +540,9 @@ static void drm_fs_inode_free(struct inode *inode) * following guidelines apply: * * - The entire device initialization procedure should be run from the - * &component_master_ops.master_bind callback, starting with drm_dev_init(), - * then binding all components with component_bind_all() and finishing with - * drm_dev_register(). + * &component_master_ops.master_bind callback, starting with + * devm_drm_dev_alloc(), then binding all components with + * component_bind_all() and finishing with drm_dev_register(). * * - The opaque pointer passed to all components through component_bind_all() * should point at &struct drm_device of the device instance, not some driver @@ -706,24 +696,9 @@ static void devm_drm_dev_init_release(void *data) drm_dev_put(data); }
-/** - * devm_drm_dev_init - Resource managed drm_dev_init() - * @parent: Parent device object - * @dev: DRM device - * @driver: DRM driver - * - * Managed drm_dev_init(). The DRM device initialized with this function is - * automatically put on driver detach using drm_dev_put(). - * - * Note that drivers must call drmm_add_final_kfree() after this function has - * completed successfully. - * - * RETURNS: - * 0 on success, or error code on failure. - */ -int devm_drm_dev_init(struct device *parent, - struct drm_device *dev, - struct drm_driver *driver) +static int devm_drm_dev_init(struct device *parent, + struct drm_device *dev, + struct drm_driver *driver) { int ret;
@@ -737,7 +712,6 @@ int devm_drm_dev_init(struct device *parent,
return ret; } -EXPORT_SYMBOL(devm_drm_dev_init);
void *__devm_drm_dev_alloc(struct device *parent, struct drm_driver *driver, size_t size, size_t offset) @@ -767,19 +741,9 @@ EXPORT_SYMBOL(__devm_drm_dev_alloc); * @driver: DRM driver to allocate device for * @parent: Parent device object * - * Allocate and initialize a new DRM device. No device registration is done. - * Call drm_dev_register() to advertice the device to user space and register it - * with other core subsystems. This should be done last in the device - * initialization sequence to make sure userspace can't access an inconsistent - * state. - * - * The initial ref-count of the object is 1. Use drm_dev_get() and - * drm_dev_put() to take and drop further ref-counts. - * - * Note that for purely virtual devices @parent can be NULL. - * - * Drivers that wish to subclass or embed &struct drm_device into their - * own struct should look at using drm_dev_init() instead. + * This is the deprecated version of devm_drm_dev_alloc(), which does not support + * subclassing through embedding the struct &drm_device in a driver private + * structure, and which does not support automatic cleanup through devres. * * RETURNS: * Pointer to new DRM device, or ERR_PTR on failure. diff --git a/drivers/gpu/drm/drm_managed.c b/drivers/gpu/drm/drm_managed.c index 1e1356560c2e..c36e3d98fd71 100644 --- a/drivers/gpu/drm/drm_managed.c +++ b/drivers/gpu/drm/drm_managed.c @@ -27,7 +27,7 @@ * be done directly with drmm_kmalloc() and the related functions. Everything * will be released on the final drm_dev_put() in reverse order of how the * release actions have been added and memory has been allocated since driver - * loading started with drm_dev_init(). + * loading started with devm_drm_dev_alloc(). * * Note that release actions and managed memory can also be added and removed * during the lifetime of the driver, all the functions are fully concurrent diff --git a/include/drm/drm_device.h b/include/drm/drm_device.h index 0988351d743c..f4f68e7a9149 100644 --- a/include/drm/drm_device.h +++ b/include/drm/drm_device.h @@ -92,7 +92,7 @@ struct drm_device { * NULL. * * Instead of using this pointer it is recommended that drivers use - * drm_dev_init() and embed struct &drm_device in their larger + * devm_drm_dev_alloc() and embed struct &drm_device in their larger * per-device structure. */ void *dev_private; diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h index 6ba7dd11384d..533c6e1a5a95 100644 --- a/include/drm/drm_drv.h +++ b/include/drm/drm_drv.h @@ -163,13 +163,12 @@ struct drm_driver { /** * @load: * - * Backward-compatible driver callback to complete - * initialization steps after the driver is registered. For - * this reason, may suffer from race conditions and its use is - * deprecated for new drivers. It is therefore only supported - * for existing drivers not yet converted to the new scheme. - * See drm_dev_init() and drm_dev_register() for proper and - * race-free way to set up a &struct drm_device. + * Backward-compatible driver callback to complete initialization steps + * after the driver is registered. For this reason, may suffer from + * race conditions and its use is deprecated for new drivers. It is + * therefore only supported for existing drivers not yet converted to + * the new scheme. See devm_drm_dev_alloc() and drm_dev_register() for + * proper and race-free way to set up a &struct drm_device. * * This is deprecated, do not use! * @@ -595,9 +594,6 @@ struct drm_driver { int drm_dev_init(struct drm_device *dev, struct drm_driver *driver, struct device *parent); -int devm_drm_dev_init(struct device *parent, - struct drm_device *dev, - struct drm_driver *driver);
void *__devm_drm_dev_alloc(struct device *parent, struct drm_driver *driver, size_t size, size_t offset);