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![Thomas Zimmermann](/assets/img/avatar_default.png)
Hide the DRM midlayer behind CONFIG_DRM_LEGACY, make functions use the prefix drm_legacy_, and move declarations to drm_legacy.h. In struct drm_device, move the fields irq and irq_enabled behind CONFIG_DRM_LEGACY. All callers have been updated. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-15-tzimmermann@suse.de
602 lines
19 KiB
C
602 lines
19 KiB
C
/*
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* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* Copyright (c) 2009-2010, Code Aurora Forum.
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* Copyright 2016 Intel Corp.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef _DRM_DRV_H_
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#define _DRM_DRV_H_
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#include <linux/list.h>
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#include <linux/irqreturn.h>
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#include <drm/drm_device.h>
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struct drm_file;
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struct drm_gem_object;
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struct drm_master;
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struct drm_minor;
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struct dma_buf;
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struct dma_buf_attachment;
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struct drm_display_mode;
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struct drm_mode_create_dumb;
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struct drm_printer;
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struct sg_table;
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/**
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* enum drm_driver_feature - feature flags
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*
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* See &drm_driver.driver_features, drm_device.driver_features and
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* drm_core_check_feature().
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*/
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enum drm_driver_feature {
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/**
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* @DRIVER_GEM:
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*
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* Driver use the GEM memory manager. This should be set for all modern
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* drivers.
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*/
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DRIVER_GEM = BIT(0),
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/**
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* @DRIVER_MODESET:
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*
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* Driver supports mode setting interfaces (KMS).
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*/
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DRIVER_MODESET = BIT(1),
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/**
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* @DRIVER_RENDER:
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*
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* Driver supports dedicated render nodes. See also the :ref:`section on
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* render nodes <drm_render_node>` for details.
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*/
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DRIVER_RENDER = BIT(3),
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/**
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* @DRIVER_ATOMIC:
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*
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* Driver supports the full atomic modesetting userspace API. Drivers
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* which only use atomic internally, but do not support the full
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* userspace API (e.g. not all properties converted to atomic, or
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* multi-plane updates are not guaranteed to be tear-free) should not
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* set this flag.
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*/
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DRIVER_ATOMIC = BIT(4),
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/**
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* @DRIVER_SYNCOBJ:
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*
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* Driver supports &drm_syncobj for explicit synchronization of command
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* submission.
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*/
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DRIVER_SYNCOBJ = BIT(5),
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/**
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* @DRIVER_SYNCOBJ_TIMELINE:
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*
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* Driver supports the timeline flavor of &drm_syncobj for explicit
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* synchronization of command submission.
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*/
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DRIVER_SYNCOBJ_TIMELINE = BIT(6),
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/* IMPORTANT: Below are all the legacy flags, add new ones above. */
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/**
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* @DRIVER_USE_AGP:
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*
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* Set up DRM AGP support, see drm_agp_init(), the DRM core will manage
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* AGP resources. New drivers don't need this.
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*/
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DRIVER_USE_AGP = BIT(25),
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/**
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* @DRIVER_LEGACY:
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*
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* Denote a legacy driver using shadow attach. Do not use.
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*/
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DRIVER_LEGACY = BIT(26),
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/**
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* @DRIVER_PCI_DMA:
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*
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* Driver is capable of PCI DMA, mapping of PCI DMA buffers to userspace
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* will be enabled. Only for legacy drivers. Do not use.
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*/
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DRIVER_PCI_DMA = BIT(27),
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/**
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* @DRIVER_SG:
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*
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* Driver can perform scatter/gather DMA, allocation and mapping of
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* scatter/gather buffers will be enabled. Only for legacy drivers. Do
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* not use.
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*/
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DRIVER_SG = BIT(28),
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/**
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* @DRIVER_HAVE_DMA:
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*
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* Driver supports DMA, the userspace DMA API will be supported. Only
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* for legacy drivers. Do not use.
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*/
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DRIVER_HAVE_DMA = BIT(29),
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/**
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* @DRIVER_HAVE_IRQ:
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*
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* Legacy irq support. Only for legacy drivers. Do not use.
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*/
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DRIVER_HAVE_IRQ = BIT(30),
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/**
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* @DRIVER_KMS_LEGACY_CONTEXT:
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*
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* Used only by nouveau for backwards compatibility with existing
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* userspace. Do not use.
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*/
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DRIVER_KMS_LEGACY_CONTEXT = BIT(31),
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};
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/**
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* struct drm_driver - DRM driver structure
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*
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* This structure represent the common code for a family of cards. There will be
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* one &struct drm_device for each card present in this family. It contains lots
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* of vfunc entries, and a pile of those probably should be moved to more
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* appropriate places like &drm_mode_config_funcs or into a new operations
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* structure for GEM drivers.
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*/
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struct drm_driver {
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/**
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* @load:
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*
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* Backward-compatible driver callback to complete initialization steps
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* after the driver is registered. For this reason, may suffer from
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* race conditions and its use is deprecated for new drivers. It is
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* therefore only supported for existing drivers not yet converted to
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* the new scheme. See devm_drm_dev_alloc() and drm_dev_register() for
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* proper and race-free way to set up a &struct drm_device.
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*
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* This is deprecated, do not use!
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*
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* Returns:
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*
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* Zero on success, non-zero value on failure.
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*/
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int (*load) (struct drm_device *, unsigned long flags);
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/**
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* @open:
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*
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* Driver callback when a new &struct drm_file is opened. Useful for
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* setting up driver-private data structures like buffer allocators,
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* execution contexts or similar things. Such driver-private resources
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* must be released again in @postclose.
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*
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* Since the display/modeset side of DRM can only be owned by exactly
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* one &struct drm_file (see &drm_file.is_master and &drm_device.master)
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* there should never be a need to set up any modeset related resources
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* in this callback. Doing so would be a driver design bug.
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*
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* Returns:
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*
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* 0 on success, a negative error code on failure, which will be
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* promoted to userspace as the result of the open() system call.
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*/
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int (*open) (struct drm_device *, struct drm_file *);
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/**
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* @postclose:
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*
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* One of the driver callbacks when a new &struct drm_file is closed.
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* Useful for tearing down driver-private data structures allocated in
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* @open like buffer allocators, execution contexts or similar things.
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*
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* Since the display/modeset side of DRM can only be owned by exactly
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* one &struct drm_file (see &drm_file.is_master and &drm_device.master)
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* there should never be a need to tear down any modeset related
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* resources in this callback. Doing so would be a driver design bug.
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*/
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void (*postclose) (struct drm_device *, struct drm_file *);
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/**
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* @lastclose:
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*
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* Called when the last &struct drm_file has been closed and there's
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* currently no userspace client for the &struct drm_device.
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*
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* Modern drivers should only use this to force-restore the fbdev
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* framebuffer using drm_fb_helper_restore_fbdev_mode_unlocked().
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* Anything else would indicate there's something seriously wrong.
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* Modern drivers can also use this to execute delayed power switching
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* state changes, e.g. in conjunction with the :ref:`vga_switcheroo`
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* infrastructure.
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*
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* This is called after @postclose hook has been called.
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*
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* NOTE:
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*
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* All legacy drivers use this callback to de-initialize the hardware.
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* This is purely because of the shadow-attach model, where the DRM
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* kernel driver does not really own the hardware. Instead ownershipe is
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* handled with the help of userspace through an inheritedly racy dance
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* to set/unset the VT into raw mode.
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*
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* Legacy drivers initialize the hardware in the @firstopen callback,
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* which isn't even called for modern drivers.
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*/
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void (*lastclose) (struct drm_device *);
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/**
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* @unload:
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*
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* Reverse the effects of the driver load callback. Ideally,
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* the clean up performed by the driver should happen in the
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* reverse order of the initialization. Similarly to the load
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* hook, this handler is deprecated and its usage should be
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* dropped in favor of an open-coded teardown function at the
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* driver layer. See drm_dev_unregister() and drm_dev_put()
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* for the proper way to remove a &struct drm_device.
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*
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* The unload() hook is called right after unregistering
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* the device.
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*
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*/
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void (*unload) (struct drm_device *);
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/**
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* @release:
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*
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* Optional callback for destroying device data after the final
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* reference is released, i.e. the device is being destroyed.
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*
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* This is deprecated, clean up all memory allocations associated with a
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* &drm_device using drmm_add_action(), drmm_kmalloc() and related
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* managed resources functions.
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*/
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void (*release) (struct drm_device *);
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/**
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* @master_set:
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*
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* Called whenever the minor master is set. Only used by vmwgfx.
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*/
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void (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
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bool from_open);
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/**
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* @master_drop:
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*
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* Called whenever the minor master is dropped. Only used by vmwgfx.
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*/
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void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv);
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/**
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* @debugfs_init:
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*
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* Allows drivers to create driver-specific debugfs files.
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*/
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void (*debugfs_init)(struct drm_minor *minor);
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/**
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* @gem_create_object: constructor for gem objects
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*
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* Hook for allocating the GEM object struct, for use by the CMA and
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* SHMEM GEM helpers.
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*/
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struct drm_gem_object *(*gem_create_object)(struct drm_device *dev,
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size_t size);
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/**
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* @prime_handle_to_fd:
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*
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* Main PRIME export function. Should be implemented with
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* drm_gem_prime_handle_to_fd() for GEM based drivers.
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*
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* For an in-depth discussion see :ref:`PRIME buffer sharing
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* documentation <prime_buffer_sharing>`.
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*/
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int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
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uint32_t handle, uint32_t flags, int *prime_fd);
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/**
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* @prime_fd_to_handle:
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*
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* Main PRIME import function. Should be implemented with
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* drm_gem_prime_fd_to_handle() for GEM based drivers.
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*
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* For an in-depth discussion see :ref:`PRIME buffer sharing
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* documentation <prime_buffer_sharing>`.
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*/
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int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
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int prime_fd, uint32_t *handle);
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/**
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* @gem_prime_import:
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*
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* Import hook for GEM drivers.
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*
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* This defaults to drm_gem_prime_import() if not set.
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*/
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struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
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struct dma_buf *dma_buf);
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/**
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* @gem_prime_import_sg_table:
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*
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* Optional hook used by the PRIME helper functions
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* drm_gem_prime_import() respectively drm_gem_prime_import_dev().
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*/
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struct drm_gem_object *(*gem_prime_import_sg_table)(
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struct drm_device *dev,
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struct dma_buf_attachment *attach,
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struct sg_table *sgt);
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/**
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* @gem_prime_mmap:
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*
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* mmap hook for GEM drivers, used to implement dma-buf mmap in the
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* PRIME helpers.
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*
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* FIXME: There's way too much duplication going on here, and also moved
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* to &drm_gem_object_funcs.
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*/
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int (*gem_prime_mmap)(struct drm_gem_object *obj,
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struct vm_area_struct *vma);
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/**
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* @dumb_create:
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*
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* This creates a new dumb buffer in the driver's backing storage manager (GEM,
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* TTM or something else entirely) and returns the resulting buffer handle. This
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* handle can then be wrapped up into a framebuffer modeset object.
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*
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* Note that userspace is not allowed to use such objects for render
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* acceleration - drivers must create their own private ioctls for such a use
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* case.
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*
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* Width, height and depth are specified in the &drm_mode_create_dumb
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* argument. The callback needs to fill the handle, pitch and size for
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* the created buffer.
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*
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* Called by the user via ioctl.
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*
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* Returns:
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*
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* Zero on success, negative errno on failure.
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*/
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int (*dumb_create)(struct drm_file *file_priv,
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struct drm_device *dev,
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struct drm_mode_create_dumb *args);
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/**
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* @dumb_map_offset:
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*
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* Allocate an offset in the drm device node's address space to be able to
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* memory map a dumb buffer.
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*
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* The default implementation is drm_gem_create_mmap_offset(). GEM based
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* drivers must not overwrite this.
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*
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* Called by the user via ioctl.
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*
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* Returns:
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*
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* Zero on success, negative errno on failure.
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*/
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int (*dumb_map_offset)(struct drm_file *file_priv,
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struct drm_device *dev, uint32_t handle,
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uint64_t *offset);
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/**
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* @dumb_destroy:
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*
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* This destroys the userspace handle for the given dumb backing storage buffer.
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* Since buffer objects must be reference counted in the kernel a buffer object
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* won't be immediately freed if a framebuffer modeset object still uses it.
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*
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* Called by the user via ioctl.
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*
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* The default implementation is drm_gem_dumb_destroy(). GEM based drivers
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* must not overwrite this.
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*
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* Returns:
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*
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* Zero on success, negative errno on failure.
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*/
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int (*dumb_destroy)(struct drm_file *file_priv,
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struct drm_device *dev,
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uint32_t handle);
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/** @major: driver major number */
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int major;
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/** @minor: driver minor number */
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int minor;
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/** @patchlevel: driver patch level */
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int patchlevel;
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/** @name: driver name */
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char *name;
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/** @desc: driver description */
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char *desc;
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/** @date: driver date */
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char *date;
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/**
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* @driver_features:
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* Driver features, see &enum drm_driver_feature. Drivers can disable
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* some features on a per-instance basis using
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* &drm_device.driver_features.
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*/
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u32 driver_features;
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/**
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* @ioctls:
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*
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* Array of driver-private IOCTL description entries. See the chapter on
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* :ref:`IOCTL support in the userland interfaces
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* chapter<drm_driver_ioctl>` for the full details.
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*/
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const struct drm_ioctl_desc *ioctls;
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/** @num_ioctls: Number of entries in @ioctls. */
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int num_ioctls;
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/**
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* @fops:
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*
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* File operations for the DRM device node. See the discussion in
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* :ref:`file operations<drm_driver_fops>` for in-depth coverage and
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* some examples.
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*/
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const struct file_operations *fops;
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#ifdef CONFIG_DRM_LEGACY
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/* Everything below here is for legacy driver, never use! */
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/* private: */
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int (*firstopen) (struct drm_device *);
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void (*preclose) (struct drm_device *, struct drm_file *file_priv);
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int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
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int (*dma_quiescent) (struct drm_device *);
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int (*context_dtor) (struct drm_device *dev, int context);
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irqreturn_t (*irq_handler)(int irq, void *arg);
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void (*irq_preinstall)(struct drm_device *dev);
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int (*irq_postinstall)(struct drm_device *dev);
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void (*irq_uninstall)(struct drm_device *dev);
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u32 (*get_vblank_counter)(struct drm_device *dev, unsigned int pipe);
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int (*enable_vblank)(struct drm_device *dev, unsigned int pipe);
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void (*disable_vblank)(struct drm_device *dev, unsigned int pipe);
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int dev_priv_size;
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#endif
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};
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void *__devm_drm_dev_alloc(struct device *parent,
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const struct drm_driver *driver,
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size_t size, size_t offset);
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/**
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* devm_drm_dev_alloc - Resource managed allocation of a &drm_device instance
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* @parent: Parent device object
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* @driver: DRM driver
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* @type: the type of the struct which contains struct &drm_device
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* @member: the name of the &drm_device within @type.
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*
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* This allocates and initialize a new DRM device. No device registration is done.
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* Call drm_dev_register() to advertice the device to user space and register it
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* with other core subsystems. This should be done last in the device
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* initialization sequence to make sure userspace can't access an inconsistent
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* state.
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*
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* The initial ref-count of the object is 1. Use drm_dev_get() and
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* drm_dev_put() to take and drop further ref-counts.
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*
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* It is recommended that drivers embed &struct drm_device into their own device
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* structure.
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*
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* Note that this manages the lifetime of the resulting &drm_device
|
|
* automatically using devres. The DRM device initialized with this function is
|
|
* automatically put on driver detach using drm_dev_put().
|
|
*
|
|
* RETURNS:
|
|
* Pointer to new DRM device, or ERR_PTR on failure.
|
|
*/
|
|
#define devm_drm_dev_alloc(parent, driver, type, member) \
|
|
((type *) __devm_drm_dev_alloc(parent, driver, sizeof(type), \
|
|
offsetof(type, member)))
|
|
|
|
struct drm_device *drm_dev_alloc(const struct drm_driver *driver,
|
|
struct device *parent);
|
|
int drm_dev_register(struct drm_device *dev, unsigned long flags);
|
|
void drm_dev_unregister(struct drm_device *dev);
|
|
|
|
void drm_dev_get(struct drm_device *dev);
|
|
void drm_dev_put(struct drm_device *dev);
|
|
void drm_put_dev(struct drm_device *dev);
|
|
bool drm_dev_enter(struct drm_device *dev, int *idx);
|
|
void drm_dev_exit(int idx);
|
|
void drm_dev_unplug(struct drm_device *dev);
|
|
|
|
/**
|
|
* drm_dev_is_unplugged - is a DRM device unplugged
|
|
* @dev: DRM device
|
|
*
|
|
* This function can be called to check whether a hotpluggable is unplugged.
|
|
* Unplugging itself is singalled through drm_dev_unplug(). If a device is
|
|
* unplugged, these two functions guarantee that any store before calling
|
|
* drm_dev_unplug() is visible to callers of this function after it completes
|
|
*
|
|
* WARNING: This function fundamentally races against drm_dev_unplug(). It is
|
|
* recommended that drivers instead use the underlying drm_dev_enter() and
|
|
* drm_dev_exit() function pairs.
|
|
*/
|
|
static inline bool drm_dev_is_unplugged(struct drm_device *dev)
|
|
{
|
|
int idx;
|
|
|
|
if (drm_dev_enter(dev, &idx)) {
|
|
drm_dev_exit(idx);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* drm_core_check_all_features - check driver feature flags mask
|
|
* @dev: DRM device to check
|
|
* @features: feature flag(s) mask
|
|
*
|
|
* This checks @dev for driver features, see &drm_driver.driver_features,
|
|
* &drm_device.driver_features, and the various &enum drm_driver_feature flags.
|
|
*
|
|
* Returns true if all features in the @features mask are supported, false
|
|
* otherwise.
|
|
*/
|
|
static inline bool drm_core_check_all_features(const struct drm_device *dev,
|
|
u32 features)
|
|
{
|
|
u32 supported = dev->driver->driver_features & dev->driver_features;
|
|
|
|
return features && (supported & features) == features;
|
|
}
|
|
|
|
/**
|
|
* drm_core_check_feature - check driver feature flags
|
|
* @dev: DRM device to check
|
|
* @feature: feature flag
|
|
*
|
|
* This checks @dev for driver features, see &drm_driver.driver_features,
|
|
* &drm_device.driver_features, and the various &enum drm_driver_feature flags.
|
|
*
|
|
* Returns true if the @feature is supported, false otherwise.
|
|
*/
|
|
static inline bool drm_core_check_feature(const struct drm_device *dev,
|
|
enum drm_driver_feature feature)
|
|
{
|
|
return drm_core_check_all_features(dev, feature);
|
|
}
|
|
|
|
/**
|
|
* drm_drv_uses_atomic_modeset - check if the driver implements
|
|
* atomic_commit()
|
|
* @dev: DRM device
|
|
*
|
|
* This check is useful if drivers do not have DRIVER_ATOMIC set but
|
|
* have atomic modesetting internally implemented.
|
|
*/
|
|
static inline bool drm_drv_uses_atomic_modeset(struct drm_device *dev)
|
|
{
|
|
return drm_core_check_feature(dev, DRIVER_ATOMIC) ||
|
|
(dev->mode_config.funcs && dev->mode_config.funcs->atomic_commit != NULL);
|
|
}
|
|
|
|
|
|
int drm_dev_set_unique(struct drm_device *dev, const char *name);
|
|
|
|
|
|
#endif
|