[Intel-gfx] [PATCH 11/20] drm: Extract drm_framebuffer.[hc]
Sean Paul
seanpaul at chromium.org
Wed Aug 10 14:48:20 UTC 2016
On Tue, Aug 9, 2016 at 9:41 AM, Daniel Vetter <daniel.vetter at ffwll.ch> wrote:
> Also start with drm_modeset.h with the core bits, since we need
> to untangle this mess somehow. That allows us to move the drm_modes.h
> include to the right spot, except for the temporary connector status
> enum. That will get fixed as soon as drm_connector.h exists.
>
> Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
> ---
> Documentation/gpu/drm-kms.rst | 9 +
> drivers/gpu/drm/Makefile | 3 +-
> drivers/gpu/drm/drm_crtc.c | 832 +-----------------------------------
> drivers/gpu/drm/drm_crtc_internal.h | 40 +-
> drivers/gpu/drm/drm_framebuffer.c | 827 +++++++++++++++++++++++++++++++++++
> include/drm/drm_crtc.h | 162 +------
> include/drm/drm_framebuffer.h | 170 ++++++++
> include/drm/drm_modes.h | 2 +
> include/drm/drm_modeset.h | 50 +++
> 9 files changed, 1106 insertions(+), 989 deletions(-)
> create mode 100644 drivers/gpu/drm/drm_framebuffer.c
> create mode 100644 include/drm/drm_framebuffer.h
> create mode 100644 include/drm/drm_modeset.h
>
> diff --git a/Documentation/gpu/drm-kms.rst b/Documentation/gpu/drm-kms.rst
> index 3ae4c12aca08..8264a88a8695 100644
> --- a/Documentation/gpu/drm-kms.rst
> +++ b/Documentation/gpu/drm-kms.rst
> @@ -64,6 +64,15 @@ fbdev framebuffer when the struct :c:type:`struct drm_framebuffer
> drivers can manually clean up a framebuffer at module unload time with
> :c:func:`drm_framebuffer_unregister_private()`.
>
> +Frame Buffer Functions Reference
> +--------------------------------
> +
> +.. kernel-doc:: drivers/gpu/drm/drm_framebuffer.c
> + :export:
> +
> +.. kernel-doc:: include/drm/drm_framebuffer.h
> + :internal:
> +
> DRM Format Handling
> ===================
>
> diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
> index a5824d926dc9..c71ec42ce511 100644
> --- a/drivers/gpu/drm/Makefile
> +++ b/drivers/gpu/drm/Makefile
> @@ -12,7 +12,8 @@ drm-y := drm_auth.o drm_bufs.o drm_cache.o \
> drm_info.o drm_debugfs.o drm_encoder_slave.o \
> drm_trace_points.o drm_global.o drm_prime.o \
> drm_rect.o drm_vma_manager.o drm_flip_work.o \
> - drm_modeset_lock.o drm_atomic.o drm_bridge.o
> + drm_modeset_lock.o drm_atomic.o drm_bridge.o \
> + drm_framebuffer.o
>
> drm-$(CONFIG_COMPAT) += drm_ioc32.o
> drm-$(CONFIG_DRM_GEM_CMA_HELPER) += drm_gem_cma_helper.o
> diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> index deed2e2c8cf1..a3c60f2caa88 100644
> --- a/drivers/gpu/drm/drm_crtc.c
> +++ b/drivers/gpu/drm/drm_crtc.c
> @@ -40,15 +40,11 @@
> #include <drm/drm_modeset_lock.h>
> #include <drm/drm_atomic.h>
> #include <drm/drm_auth.h>
> +#include <drm/drm_framebuffer.h>
>
> #include "drm_crtc_internal.h"
> #include "drm_internal.h"
>
> -static struct drm_framebuffer *
> -internal_framebuffer_create(struct drm_device *dev,
> - const struct drm_mode_fb_cmd2 *r,
> - struct drm_file *file_priv);
> -
> /* Avoid boilerplate. I'm tired of typing. */
> #define DRM_ENUM_NAME_FN(fnname, list) \
> const char *fnname(int val) \
> @@ -238,11 +234,11 @@ EXPORT_SYMBOL(drm_get_subpixel_order_name);
> * Internal function to assign a slot in the object idr and optionally
> * register the object into the idr.
> */
> -static int drm_mode_object_get_reg(struct drm_device *dev,
> - struct drm_mode_object *obj,
> - uint32_t obj_type,
> - bool register_obj,
> - void (*obj_free_cb)(struct kref *kref))
> +int drm_mode_object_get_reg(struct drm_device *dev,
> + struct drm_mode_object *obj,
> + uint32_t obj_type,
> + bool register_obj,
> + void (*obj_free_cb)(struct kref *kref))
> {
> int ret;
>
> @@ -285,8 +281,8 @@ int drm_mode_object_get(struct drm_device *dev,
> return drm_mode_object_get_reg(dev, obj, obj_type, true, NULL);
> }
>
> -static void drm_mode_object_register(struct drm_device *dev,
> - struct drm_mode_object *obj)
> +void drm_mode_object_register(struct drm_device *dev,
> + struct drm_mode_object *obj)
> {
> mutex_lock(&dev->mode_config.idr_mutex);
> idr_replace(&dev->mode_config.crtc_idr, obj, obj->id);
> @@ -315,8 +311,8 @@ void drm_mode_object_unregister(struct drm_device *dev,
> mutex_unlock(&dev->mode_config.idr_mutex);
> }
>
> -static struct drm_mode_object *_object_find(struct drm_device *dev,
> - uint32_t id, uint32_t type)
> +struct drm_mode_object *__drm_mode_object_find(struct drm_device *dev,
> + uint32_t id, uint32_t type)
> {
> struct drm_mode_object *obj = NULL;
>
> @@ -351,7 +347,7 @@ struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
> {
> struct drm_mode_object *obj = NULL;
>
> - obj = _object_find(dev, id, type);
> + obj = __drm_mode_object_find(dev, id, type);
> return obj;
> }
> EXPORT_SYMBOL(drm_mode_object_find);
> @@ -407,233 +403,6 @@ int drm_crtc_force_disable(struct drm_crtc *crtc)
> }
> EXPORT_SYMBOL(drm_crtc_force_disable);
>
> -/**
> - * drm_crtc_force_disable_all - Forcibly turn off all enabled CRTCs
> - * @dev: DRM device whose CRTCs to turn off
> - *
> - * Drivers may want to call this on unload to ensure that all displays are
> - * unlit and the GPU is in a consistent, low power state. Takes modeset locks.
> - *
> - * Returns:
> - * Zero on success, error code on failure.
> - */
> -int drm_crtc_force_disable_all(struct drm_device *dev)
> -{
> - struct drm_crtc *crtc;
> - int ret = 0;
> -
> - drm_modeset_lock_all(dev);
> - drm_for_each_crtc(crtc, dev)
> - if (crtc->enabled) {
> - ret = drm_crtc_force_disable(crtc);
> - if (ret)
> - goto out;
> - }
> -out:
> - drm_modeset_unlock_all(dev);
> - return ret;
> -}
> -EXPORT_SYMBOL(drm_crtc_force_disable_all);
I'm not so sure about moving this one. If it's going to be declared in
drm_crtc.h, it should stay here (with force_disable). Alternatively,
assuming no one else is using this (didn't check), move it to
drm_framebuffer and make it a static helper function there (removing
the declaration from drm_crtc.h).
Sean
> -
> -static void drm_framebuffer_free(struct kref *kref)
> -{
> - struct drm_framebuffer *fb =
> - container_of(kref, struct drm_framebuffer, base.refcount);
> - struct drm_device *dev = fb->dev;
> -
> - /*
> - * The lookup idr holds a weak reference, which has not necessarily been
> - * removed at this point. Check for that.
> - */
> - drm_mode_object_unregister(dev, &fb->base);
> -
> - fb->funcs->destroy(fb);
> -}
> -
> -/**
> - * drm_framebuffer_init - initialize a framebuffer
> - * @dev: DRM device
> - * @fb: framebuffer to be initialized
> - * @funcs: ... with these functions
> - *
> - * Allocates an ID for the framebuffer's parent mode object, sets its mode
> - * functions & device file and adds it to the master fd list.
> - *
> - * IMPORTANT:
> - * This functions publishes the fb and makes it available for concurrent access
> - * by other users. Which means by this point the fb _must_ be fully set up -
> - * since all the fb attributes are invariant over its lifetime, no further
> - * locking but only correct reference counting is required.
> - *
> - * Returns:
> - * Zero on success, error code on failure.
> - */
> -int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
> - const struct drm_framebuffer_funcs *funcs)
> -{
> - int ret;
> -
> - INIT_LIST_HEAD(&fb->filp_head);
> - fb->dev = dev;
> - fb->funcs = funcs;
> -
> - ret = drm_mode_object_get_reg(dev, &fb->base, DRM_MODE_OBJECT_FB,
> - false, drm_framebuffer_free);
> - if (ret)
> - goto out;
> -
> - mutex_lock(&dev->mode_config.fb_lock);
> - dev->mode_config.num_fb++;
> - list_add(&fb->head, &dev->mode_config.fb_list);
> - mutex_unlock(&dev->mode_config.fb_lock);
> -
> - drm_mode_object_register(dev, &fb->base);
> -out:
> - return ret;
> -}
> -EXPORT_SYMBOL(drm_framebuffer_init);
> -
> -/**
> - * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference
> - * @dev: drm device
> - * @id: id of the fb object
> - *
> - * If successful, this grabs an additional reference to the framebuffer -
> - * callers need to make sure to eventually unreference the returned framebuffer
> - * again, using @drm_framebuffer_unreference.
> - */
> -struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
> - uint32_t id)
> -{
> - struct drm_mode_object *obj;
> - struct drm_framebuffer *fb = NULL;
> -
> - obj = _object_find(dev, id, DRM_MODE_OBJECT_FB);
> - if (obj)
> - fb = obj_to_fb(obj);
> - return fb;
> -}
> -EXPORT_SYMBOL(drm_framebuffer_lookup);
> -
> -/**
> - * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr
> - * @fb: fb to unregister
> - *
> - * Drivers need to call this when cleaning up driver-private framebuffers, e.g.
> - * those used for fbdev. Note that the caller must hold a reference of it's own,
> - * i.e. the object may not be destroyed through this call (since it'll lead to a
> - * locking inversion).
> - */
> -void drm_framebuffer_unregister_private(struct drm_framebuffer *fb)
> -{
> - struct drm_device *dev;
> -
> - if (!fb)
> - return;
> -
> - dev = fb->dev;
> -
> - /* Mark fb as reaped and drop idr ref. */
> - drm_mode_object_unregister(dev, &fb->base);
> -}
> -EXPORT_SYMBOL(drm_framebuffer_unregister_private);
> -
> -/**
> - * drm_framebuffer_cleanup - remove a framebuffer object
> - * @fb: framebuffer to remove
> - *
> - * Cleanup framebuffer. This function is intended to be used from the drivers
> - * ->destroy callback. It can also be used to clean up driver private
> - * framebuffers embedded into a larger structure.
> - *
> - * Note that this function does not remove the fb from active usuage - if it is
> - * still used anywhere, hilarity can ensue since userspace could call getfb on
> - * the id and get back -EINVAL. Obviously no concern at driver unload time.
> - *
> - * Also, the framebuffer will not be removed from the lookup idr - for
> - * user-created framebuffers this will happen in in the rmfb ioctl. For
> - * driver-private objects (e.g. for fbdev) drivers need to explicitly call
> - * drm_framebuffer_unregister_private.
> - */
> -void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
> -{
> - struct drm_device *dev = fb->dev;
> -
> - mutex_lock(&dev->mode_config.fb_lock);
> - list_del(&fb->head);
> - dev->mode_config.num_fb--;
> - mutex_unlock(&dev->mode_config.fb_lock);
> -}
> -EXPORT_SYMBOL(drm_framebuffer_cleanup);
> -
> -/**
> - * drm_framebuffer_remove - remove and unreference a framebuffer object
> - * @fb: framebuffer to remove
> - *
> - * Scans all the CRTCs and planes in @dev's mode_config. If they're
> - * using @fb, removes it, setting it to NULL. Then drops the reference to the
> - * passed-in framebuffer. Might take the modeset locks.
> - *
> - * Note that this function optimizes the cleanup away if the caller holds the
> - * last reference to the framebuffer. It is also guaranteed to not take the
> - * modeset locks in this case.
> - */
> -void drm_framebuffer_remove(struct drm_framebuffer *fb)
> -{
> - struct drm_device *dev;
> - struct drm_crtc *crtc;
> - struct drm_plane *plane;
> -
> - if (!fb)
> - return;
> -
> - dev = fb->dev;
> -
> - WARN_ON(!list_empty(&fb->filp_head));
> -
> - /*
> - * drm ABI mandates that we remove any deleted framebuffers from active
> - * useage. But since most sane clients only remove framebuffers they no
> - * longer need, try to optimize this away.
> - *
> - * Since we're holding a reference ourselves, observing a refcount of 1
> - * means that we're the last holder and can skip it. Also, the refcount
> - * can never increase from 1 again, so we don't need any barriers or
> - * locks.
> - *
> - * Note that userspace could try to race with use and instate a new
> - * usage _after_ we've cleared all current ones. End result will be an
> - * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot
> - * in this manner.
> - */
> - if (drm_framebuffer_read_refcount(fb) > 1) {
> - if (dev->mode_config.funcs->atomic_commit) {
> - drm_atomic_remove_fb(fb);
> - goto out;
> - }
> -
> - drm_modeset_lock_all(dev);
> - /* remove from any CRTC */
> - drm_for_each_crtc(crtc, dev) {
> - if (crtc->primary->fb == fb) {
> - /* should turn off the crtc */
> - if (drm_crtc_force_disable(crtc))
> - DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
> - }
> - }
> -
> - drm_for_each_plane(plane, dev) {
> - if (plane->fb == fb)
> - drm_plane_force_disable(plane);
> - }
> - drm_modeset_unlock_all(dev);
> - }
> -
> -out:
> - drm_framebuffer_unreference(fb);
> -}
> -EXPORT_SYMBOL(drm_framebuffer_remove);
> -
> DEFINE_WW_CLASS(crtc_ww_class);
>
> static unsigned int drm_num_crtcs(struct drm_device *dev)
> @@ -3010,7 +2779,7 @@ static int drm_mode_cursor_universal(struct drm_crtc *crtc,
> */
> if (req->flags & DRM_MODE_CURSOR_BO) {
> if (req->handle) {
> - fb = internal_framebuffer_create(dev, &fbreq, file_priv);
> + fb = drm_internal_framebuffer_create(dev, &fbreq, file_priv);
> if (IS_ERR(fb)) {
> DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n");
> return PTR_ERR(fb);
> @@ -3208,578 +2977,6 @@ uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth)
> }
> EXPORT_SYMBOL(drm_mode_legacy_fb_format);
>
> -/**
> - * drm_mode_addfb - add an FB to the graphics configuration
> - * @dev: drm device for the ioctl
> - * @data: data pointer for the ioctl
> - * @file_priv: drm file for the ioctl call
> - *
> - * Add a new FB to the specified CRTC, given a user request. This is the
> - * original addfb ioctl which only supported RGB formats.
> - *
> - * Called by the user via ioctl.
> - *
> - * Returns:
> - * Zero on success, negative errno on failure.
> - */
> -int drm_mode_addfb(struct drm_device *dev,
> - void *data, struct drm_file *file_priv)
> -{
> - struct drm_mode_fb_cmd *or = data;
> - struct drm_mode_fb_cmd2 r = {};
> - int ret;
> -
> - /* convert to new format and call new ioctl */
> - r.fb_id = or->fb_id;
> - r.width = or->width;
> - r.height = or->height;
> - r.pitches[0] = or->pitch;
> - r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth);
> - r.handles[0] = or->handle;
> -
> - ret = drm_mode_addfb2(dev, &r, file_priv);
> - if (ret)
> - return ret;
> -
> - or->fb_id = r.fb_id;
> -
> - return 0;
> -}
> -
> -static int format_check(const struct drm_mode_fb_cmd2 *r)
> -{
> - uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN;
> -
> - switch (format) {
> - case DRM_FORMAT_C8:
> - case DRM_FORMAT_RGB332:
> - case DRM_FORMAT_BGR233:
> - case DRM_FORMAT_XRGB4444:
> - case DRM_FORMAT_XBGR4444:
> - case DRM_FORMAT_RGBX4444:
> - case DRM_FORMAT_BGRX4444:
> - case DRM_FORMAT_ARGB4444:
> - case DRM_FORMAT_ABGR4444:
> - case DRM_FORMAT_RGBA4444:
> - case DRM_FORMAT_BGRA4444:
> - case DRM_FORMAT_XRGB1555:
> - case DRM_FORMAT_XBGR1555:
> - case DRM_FORMAT_RGBX5551:
> - case DRM_FORMAT_BGRX5551:
> - case DRM_FORMAT_ARGB1555:
> - case DRM_FORMAT_ABGR1555:
> - case DRM_FORMAT_RGBA5551:
> - case DRM_FORMAT_BGRA5551:
> - case DRM_FORMAT_RGB565:
> - case DRM_FORMAT_BGR565:
> - case DRM_FORMAT_RGB888:
> - case DRM_FORMAT_BGR888:
> - case DRM_FORMAT_XRGB8888:
> - case DRM_FORMAT_XBGR8888:
> - case DRM_FORMAT_RGBX8888:
> - case DRM_FORMAT_BGRX8888:
> - case DRM_FORMAT_ARGB8888:
> - case DRM_FORMAT_ABGR8888:
> - case DRM_FORMAT_RGBA8888:
> - case DRM_FORMAT_BGRA8888:
> - case DRM_FORMAT_XRGB2101010:
> - case DRM_FORMAT_XBGR2101010:
> - case DRM_FORMAT_RGBX1010102:
> - case DRM_FORMAT_BGRX1010102:
> - case DRM_FORMAT_ARGB2101010:
> - case DRM_FORMAT_ABGR2101010:
> - case DRM_FORMAT_RGBA1010102:
> - case DRM_FORMAT_BGRA1010102:
> - case DRM_FORMAT_YUYV:
> - case DRM_FORMAT_YVYU:
> - case DRM_FORMAT_UYVY:
> - case DRM_FORMAT_VYUY:
> - case DRM_FORMAT_AYUV:
> - case DRM_FORMAT_NV12:
> - case DRM_FORMAT_NV21:
> - case DRM_FORMAT_NV16:
> - case DRM_FORMAT_NV61:
> - case DRM_FORMAT_NV24:
> - case DRM_FORMAT_NV42:
> - case DRM_FORMAT_YUV410:
> - case DRM_FORMAT_YVU410:
> - case DRM_FORMAT_YUV411:
> - case DRM_FORMAT_YVU411:
> - case DRM_FORMAT_YUV420:
> - case DRM_FORMAT_YVU420:
> - case DRM_FORMAT_YUV422:
> - case DRM_FORMAT_YVU422:
> - case DRM_FORMAT_YUV444:
> - case DRM_FORMAT_YVU444:
> - return 0;
> - default:
> - DRM_DEBUG_KMS("invalid pixel format %s\n",
> - drm_get_format_name(r->pixel_format));
> - return -EINVAL;
> - }
> -}
> -
> -static int framebuffer_check(const struct drm_mode_fb_cmd2 *r)
> -{
> - int ret, hsub, vsub, num_planes, i;
> -
> - ret = format_check(r);
> - if (ret) {
> - DRM_DEBUG_KMS("bad framebuffer format %s\n",
> - drm_get_format_name(r->pixel_format));
> - return ret;
> - }
> -
> - hsub = drm_format_horz_chroma_subsampling(r->pixel_format);
> - vsub = drm_format_vert_chroma_subsampling(r->pixel_format);
> - num_planes = drm_format_num_planes(r->pixel_format);
> -
> - if (r->width == 0 || r->width % hsub) {
> - DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width);
> - return -EINVAL;
> - }
> -
> - if (r->height == 0 || r->height % vsub) {
> - DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height);
> - return -EINVAL;
> - }
> -
> - for (i = 0; i < num_planes; i++) {
> - unsigned int width = r->width / (i != 0 ? hsub : 1);
> - unsigned int height = r->height / (i != 0 ? vsub : 1);
> - unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i);
> -
> - if (!r->handles[i]) {
> - DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i);
> - return -EINVAL;
> - }
> -
> - if ((uint64_t) width * cpp > UINT_MAX)
> - return -ERANGE;
> -
> - if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX)
> - return -ERANGE;
> -
> - if (r->pitches[i] < width * cpp) {
> - DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i);
> - return -EINVAL;
> - }
> -
> - if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) {
> - DRM_DEBUG_KMS("bad fb modifier %llu for plane %d\n",
> - r->modifier[i], i);
> - return -EINVAL;
> - }
> -
> - /* modifier specific checks: */
> - switch (r->modifier[i]) {
> - case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE:
> - /* NOTE: the pitch restriction may be lifted later if it turns
> - * out that no hw has this restriction:
> - */
> - if (r->pixel_format != DRM_FORMAT_NV12 ||
> - width % 128 || height % 32 ||
> - r->pitches[i] % 128) {
> - DRM_DEBUG_KMS("bad modifier data for plane %d\n", i);
> - return -EINVAL;
> - }
> - break;
> -
> - default:
> - break;
> - }
> - }
> -
> - for (i = num_planes; i < 4; i++) {
> - if (r->modifier[i]) {
> - DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i);
> - return -EINVAL;
> - }
> -
> - /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */
> - if (!(r->flags & DRM_MODE_FB_MODIFIERS))
> - continue;
> -
> - if (r->handles[i]) {
> - DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i);
> - return -EINVAL;
> - }
> -
> - if (r->pitches[i]) {
> - DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i);
> - return -EINVAL;
> - }
> -
> - if (r->offsets[i]) {
> - DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i);
> - return -EINVAL;
> - }
> - }
> -
> - return 0;
> -}
> -
> -static struct drm_framebuffer *
> -internal_framebuffer_create(struct drm_device *dev,
> - const struct drm_mode_fb_cmd2 *r,
> - struct drm_file *file_priv)
> -{
> - struct drm_mode_config *config = &dev->mode_config;
> - struct drm_framebuffer *fb;
> - int ret;
> -
> - if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) {
> - DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags);
> - return ERR_PTR(-EINVAL);
> - }
> -
> - if ((config->min_width > r->width) || (r->width > config->max_width)) {
> - DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n",
> - r->width, config->min_width, config->max_width);
> - return ERR_PTR(-EINVAL);
> - }
> - if ((config->min_height > r->height) || (r->height > config->max_height)) {
> - DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n",
> - r->height, config->min_height, config->max_height);
> - return ERR_PTR(-EINVAL);
> - }
> -
> - if (r->flags & DRM_MODE_FB_MODIFIERS &&
> - !dev->mode_config.allow_fb_modifiers) {
> - DRM_DEBUG_KMS("driver does not support fb modifiers\n");
> - return ERR_PTR(-EINVAL);
> - }
> -
> - ret = framebuffer_check(r);
> - if (ret)
> - return ERR_PTR(ret);
> -
> - fb = dev->mode_config.funcs->fb_create(dev, file_priv, r);
> - if (IS_ERR(fb)) {
> - DRM_DEBUG_KMS("could not create framebuffer\n");
> - return fb;
> - }
> -
> - return fb;
> -}
> -
> -/**
> - * drm_mode_addfb2 - add an FB to the graphics configuration
> - * @dev: drm device for the ioctl
> - * @data: data pointer for the ioctl
> - * @file_priv: drm file for the ioctl call
> - *
> - * Add a new FB to the specified CRTC, given a user request with format. This is
> - * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers
> - * and uses fourcc codes as pixel format specifiers.
> - *
> - * Called by the user via ioctl.
> - *
> - * Returns:
> - * Zero on success, negative errno on failure.
> - */
> -int drm_mode_addfb2(struct drm_device *dev,
> - void *data, struct drm_file *file_priv)
> -{
> - struct drm_mode_fb_cmd2 *r = data;
> - struct drm_framebuffer *fb;
> -
> - if (!drm_core_check_feature(dev, DRIVER_MODESET))
> - return -EINVAL;
> -
> - fb = internal_framebuffer_create(dev, r, file_priv);
> - if (IS_ERR(fb))
> - return PTR_ERR(fb);
> -
> - DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
> - r->fb_id = fb->base.id;
> -
> - /* Transfer ownership to the filp for reaping on close */
> - mutex_lock(&file_priv->fbs_lock);
> - list_add(&fb->filp_head, &file_priv->fbs);
> - mutex_unlock(&file_priv->fbs_lock);
> -
> - return 0;
> -}
> -
> -struct drm_mode_rmfb_work {
> - struct work_struct work;
> - struct list_head fbs;
> -};
> -
> -static void drm_mode_rmfb_work_fn(struct work_struct *w)
> -{
> - struct drm_mode_rmfb_work *arg = container_of(w, typeof(*arg), work);
> -
> - while (!list_empty(&arg->fbs)) {
> - struct drm_framebuffer *fb =
> - list_first_entry(&arg->fbs, typeof(*fb), filp_head);
> -
> - list_del_init(&fb->filp_head);
> - drm_framebuffer_remove(fb);
> - }
> -}
> -
> -/**
> - * drm_mode_rmfb - remove an FB from the configuration
> - * @dev: drm device for the ioctl
> - * @data: data pointer for the ioctl
> - * @file_priv: drm file for the ioctl call
> - *
> - * Remove the FB specified by the user.
> - *
> - * Called by the user via ioctl.
> - *
> - * Returns:
> - * Zero on success, negative errno on failure.
> - */
> -int drm_mode_rmfb(struct drm_device *dev,
> - void *data, struct drm_file *file_priv)
> -{
> - struct drm_framebuffer *fb = NULL;
> - struct drm_framebuffer *fbl = NULL;
> - uint32_t *id = data;
> - int found = 0;
> -
> - if (!drm_core_check_feature(dev, DRIVER_MODESET))
> - return -EINVAL;
> -
> - fb = drm_framebuffer_lookup(dev, *id);
> - if (!fb)
> - return -ENOENT;
> -
> - mutex_lock(&file_priv->fbs_lock);
> - list_for_each_entry(fbl, &file_priv->fbs, filp_head)
> - if (fb == fbl)
> - found = 1;
> - if (!found) {
> - mutex_unlock(&file_priv->fbs_lock);
> - goto fail_unref;
> - }
> -
> - list_del_init(&fb->filp_head);
> - mutex_unlock(&file_priv->fbs_lock);
> -
> - /* drop the reference we picked up in framebuffer lookup */
> - drm_framebuffer_unreference(fb);
> -
> - /*
> - * we now own the reference that was stored in the fbs list
> - *
> - * drm_framebuffer_remove may fail with -EINTR on pending signals,
> - * so run this in a separate stack as there's no way to correctly
> - * handle this after the fb is already removed from the lookup table.
> - */
> - if (drm_framebuffer_read_refcount(fb) > 1) {
> - struct drm_mode_rmfb_work arg;
> -
> - INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn);
> - INIT_LIST_HEAD(&arg.fbs);
> - list_add_tail(&fb->filp_head, &arg.fbs);
> -
> - schedule_work(&arg.work);
> - flush_work(&arg.work);
> - destroy_work_on_stack(&arg.work);
> - } else
> - drm_framebuffer_unreference(fb);
> -
> - return 0;
> -
> -fail_unref:
> - drm_framebuffer_unreference(fb);
> - return -ENOENT;
> -}
> -
> -/**
> - * drm_mode_getfb - get FB info
> - * @dev: drm device for the ioctl
> - * @data: data pointer for the ioctl
> - * @file_priv: drm file for the ioctl call
> - *
> - * Lookup the FB given its ID and return info about it.
> - *
> - * Called by the user via ioctl.
> - *
> - * Returns:
> - * Zero on success, negative errno on failure.
> - */
> -int drm_mode_getfb(struct drm_device *dev,
> - void *data, struct drm_file *file_priv)
> -{
> - struct drm_mode_fb_cmd *r = data;
> - struct drm_framebuffer *fb;
> - int ret;
> -
> - if (!drm_core_check_feature(dev, DRIVER_MODESET))
> - return -EINVAL;
> -
> - fb = drm_framebuffer_lookup(dev, r->fb_id);
> - if (!fb)
> - return -ENOENT;
> -
> - r->height = fb->height;
> - r->width = fb->width;
> - r->depth = fb->depth;
> - r->bpp = fb->bits_per_pixel;
> - r->pitch = fb->pitches[0];
> - if (fb->funcs->create_handle) {
> - if (drm_is_current_master(file_priv) || capable(CAP_SYS_ADMIN) ||
> - drm_is_control_client(file_priv)) {
> - ret = fb->funcs->create_handle(fb, file_priv,
> - &r->handle);
> - } else {
> - /* GET_FB() is an unprivileged ioctl so we must not
> - * return a buffer-handle to non-master processes! For
> - * backwards-compatibility reasons, we cannot make
> - * GET_FB() privileged, so just return an invalid handle
> - * for non-masters. */
> - r->handle = 0;
> - ret = 0;
> - }
> - } else {
> - ret = -ENODEV;
> - }
> -
> - drm_framebuffer_unreference(fb);
> -
> - return ret;
> -}
> -
> -/**
> - * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB
> - * @dev: drm device for the ioctl
> - * @data: data pointer for the ioctl
> - * @file_priv: drm file for the ioctl call
> - *
> - * Lookup the FB and flush out the damaged area supplied by userspace as a clip
> - * rectangle list. Generic userspace which does frontbuffer rendering must call
> - * this ioctl to flush out the changes on manual-update display outputs, e.g.
> - * usb display-link, mipi manual update panels or edp panel self refresh modes.
> - *
> - * Modesetting drivers which always update the frontbuffer do not need to
> - * implement the corresponding ->dirty framebuffer callback.
> - *
> - * Called by the user via ioctl.
> - *
> - * Returns:
> - * Zero on success, negative errno on failure.
> - */
> -int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
> - void *data, struct drm_file *file_priv)
> -{
> - struct drm_clip_rect __user *clips_ptr;
> - struct drm_clip_rect *clips = NULL;
> - struct drm_mode_fb_dirty_cmd *r = data;
> - struct drm_framebuffer *fb;
> - unsigned flags;
> - int num_clips;
> - int ret;
> -
> - if (!drm_core_check_feature(dev, DRIVER_MODESET))
> - return -EINVAL;
> -
> - fb = drm_framebuffer_lookup(dev, r->fb_id);
> - if (!fb)
> - return -ENOENT;
> -
> - num_clips = r->num_clips;
> - clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr;
> -
> - if (!num_clips != !clips_ptr) {
> - ret = -EINVAL;
> - goto out_err1;
> - }
> -
> - flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags;
> -
> - /* If userspace annotates copy, clips must come in pairs */
> - if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) {
> - ret = -EINVAL;
> - goto out_err1;
> - }
> -
> - if (num_clips && clips_ptr) {
> - if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) {
> - ret = -EINVAL;
> - goto out_err1;
> - }
> - clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
> - if (!clips) {
> - ret = -ENOMEM;
> - goto out_err1;
> - }
> -
> - ret = copy_from_user(clips, clips_ptr,
> - num_clips * sizeof(*clips));
> - if (ret) {
> - ret = -EFAULT;
> - goto out_err2;
> - }
> - }
> -
> - if (fb->funcs->dirty) {
> - ret = fb->funcs->dirty(fb, file_priv, flags, r->color,
> - clips, num_clips);
> - } else {
> - ret = -ENOSYS;
> - }
> -
> -out_err2:
> - kfree(clips);
> -out_err1:
> - drm_framebuffer_unreference(fb);
> -
> - return ret;
> -}
> -
> -/**
> - * drm_fb_release - remove and free the FBs on this file
> - * @priv: drm file for the ioctl
> - *
> - * Destroy all the FBs associated with @filp.
> - *
> - * Called by the user via ioctl.
> - *
> - * Returns:
> - * Zero on success, negative errno on failure.
> - */
> -void drm_fb_release(struct drm_file *priv)
> -{
> - struct drm_framebuffer *fb, *tfb;
> - struct drm_mode_rmfb_work arg;
> -
> - INIT_LIST_HEAD(&arg.fbs);
> -
> - /*
> - * When the file gets released that means no one else can access the fb
> - * list any more, so no need to grab fpriv->fbs_lock. And we need to
> - * avoid upsetting lockdep since the universal cursor code adds a
> - * framebuffer while holding mutex locks.
> - *
> - * Note that a real deadlock between fpriv->fbs_lock and the modeset
> - * locks is impossible here since no one else but this function can get
> - * at it any more.
> - */
> - list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
> - if (drm_framebuffer_read_refcount(fb) > 1) {
> - list_move_tail(&fb->filp_head, &arg.fbs);
> - } else {
> - list_del_init(&fb->filp_head);
> -
> - /* This drops the fpriv->fbs reference. */
> - drm_framebuffer_unreference(fb);
> - }
> - }
> -
> - if (!list_empty(&arg.fbs)) {
> - INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn);
> -
> - schedule_work(&arg.work);
> - flush_work(&arg.work);
> - destroy_work_on_stack(&arg.work);
> - }
> -}
> -
> static bool drm_property_type_valid(struct drm_property *property)
> {
> if (property->flags & DRM_MODE_PROP_EXTENDED_TYPE)
> @@ -4492,7 +3689,7 @@ struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev,
> struct drm_mode_object *obj;
> struct drm_property_blob *blob = NULL;
>
> - obj = _object_find(dev, id, DRM_MODE_OBJECT_BLOB);
> + obj = __drm_mode_object_find(dev, id, DRM_MODE_OBJECT_BLOB);
> if (obj)
> blob = obj_to_blob(obj);
> return blob;
> @@ -4888,7 +4085,8 @@ bool drm_property_change_valid_get(struct drm_property *property,
> if (value == 0)
> return true;
>
> - *ref = _object_find(property->dev, value, property->values[0]);
> + *ref = __drm_mode_object_find(property->dev, value,
> + property->values[0]);
> return *ref != NULL;
> }
>
> diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h
> index 3ea72e1780b1..5f1e9ff71ae4 100644
> --- a/drivers/gpu/drm/drm_crtc_internal.h
> +++ b/drivers/gpu/drm/drm_crtc_internal.h
> @@ -35,8 +35,17 @@
> /* drm_crtc.c */
> void drm_connector_ida_init(void);
> void drm_connector_ida_destroy(void);
> +int drm_mode_object_get_reg(struct drm_device *dev,
> + struct drm_mode_object *obj,
> + uint32_t obj_type,
> + bool register_obj,
> + void (*obj_free_cb)(struct kref *kref));
> +void drm_mode_object_register(struct drm_device *dev,
> + struct drm_mode_object *obj);
> int drm_mode_object_get(struct drm_device *dev,
> struct drm_mode_object *obj, uint32_t obj_type);
> +struct drm_mode_object *__drm_mode_object_find(struct drm_device *dev,
> + uint32_t id, uint32_t type);
> void drm_mode_object_unregister(struct drm_device *dev,
> struct drm_mode_object *object);
> bool drm_property_change_valid_get(struct drm_property *property,
> @@ -64,18 +73,6 @@ int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
> int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
> void *data, struct drm_file *file_priv);
>
> -/* framebuffer IOCTLs */
> -extern int drm_mode_addfb(struct drm_device *dev,
> - void *data, struct drm_file *file_priv);
> -extern int drm_mode_addfb2(struct drm_device *dev,
> - void *data, struct drm_file *file_priv);
> -int drm_mode_rmfb(struct drm_device *dev,
> - void *data, struct drm_file *file_priv);
> -int drm_mode_getfb(struct drm_device *dev,
> - void *data, struct drm_file *file_priv);
> -int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
> - void *data, struct drm_file *file_priv);
> -
> /* IOCTLs */
> int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
> struct drm_file *file_priv);
> @@ -120,6 +117,25 @@ int drm_mode_gamma_set_ioctl(struct drm_device *dev,
> int drm_mode_page_flip_ioctl(struct drm_device *dev,
> void *data, struct drm_file *file_priv);
>
> +/* drm_framebuffer.c */
> +struct drm_framebuffer *
> +drm_internal_framebuffer_create(struct drm_device *dev,
> + const struct drm_mode_fb_cmd2 *r,
> + struct drm_file *file_priv);
> +void drm_framebuffer_free(struct kref *kref);
> +
> +/* IOCTL */
> +int drm_mode_addfb(struct drm_device *dev,
> + void *data, struct drm_file *file_priv);
> +int drm_mode_addfb2(struct drm_device *dev,
> + void *data, struct drm_file *file_priv);
> +int drm_mode_rmfb(struct drm_device *dev,
> + void *data, struct drm_file *file_priv);
> +int drm_mode_getfb(struct drm_device *dev,
> + void *data, struct drm_file *file_priv);
> +int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
> + void *data, struct drm_file *file_priv);
> +
> /* drm_atomic.c */
> int drm_atomic_get_property(struct drm_mode_object *obj,
> struct drm_property *property, uint64_t *val);
> diff --git a/drivers/gpu/drm/drm_framebuffer.c b/drivers/gpu/drm/drm_framebuffer.c
> new file mode 100644
> index 000000000000..c7a8a623b336
> --- /dev/null
> +++ b/drivers/gpu/drm/drm_framebuffer.c
> @@ -0,0 +1,827 @@
> +/*
> + * Copyright (c) 2016 Intel Corporation
> + *
> + * Permission to use, copy, modify, distribute, and sell this software and its
> + * documentation for any purpose is hereby granted without fee, provided that
> + * the above copyright notice appear in all copies and that both that copyright
> + * notice and this permission notice appear in supporting documentation, and
> + * that the name of the copyright holders not be used in advertising or
> + * publicity pertaining to distribution of the software without specific,
> + * written prior permission. The copyright holders make no representations
> + * about the suitability of this software for any purpose. It is provided "as
> + * is" without express or implied warranty.
> + *
> + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
> + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
> + * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
> + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
> + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
> + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
> + * OF THIS SOFTWARE.
> + */
> +
> +#include <linux/export.h>
> +#include <drm/drmP.h>
> +#include <drm/drm_auth.h>
> +#include <drm/drm_framebuffer.h>
> +
> +#include "drm_crtc_internal.h"
> +
> +/**
> + * drm_mode_addfb - add an FB to the graphics configuration
> + * @dev: drm device for the ioctl
> + * @data: data pointer for the ioctl
> + * @file_priv: drm file for the ioctl call
> + *
> + * Add a new FB to the specified CRTC, given a user request. This is the
> + * original addfb ioctl which only supported RGB formats.
> + *
> + * Called by the user via ioctl.
> + *
> + * Returns:
> + * Zero on success, negative errno on failure.
> + */
> +int drm_mode_addfb(struct drm_device *dev,
> + void *data, struct drm_file *file_priv)
> +{
> + struct drm_mode_fb_cmd *or = data;
> + struct drm_mode_fb_cmd2 r = {};
> + int ret;
> +
> + /* convert to new format and call new ioctl */
> + r.fb_id = or->fb_id;
> + r.width = or->width;
> + r.height = or->height;
> + r.pitches[0] = or->pitch;
> + r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth);
> + r.handles[0] = or->handle;
> +
> + ret = drm_mode_addfb2(dev, &r, file_priv);
> + if (ret)
> + return ret;
> +
> + or->fb_id = r.fb_id;
> +
> + return 0;
> +}
> +
> +static int format_check(const struct drm_mode_fb_cmd2 *r)
> +{
> + uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN;
> +
> + switch (format) {
> + case DRM_FORMAT_C8:
> + case DRM_FORMAT_RGB332:
> + case DRM_FORMAT_BGR233:
> + case DRM_FORMAT_XRGB4444:
> + case DRM_FORMAT_XBGR4444:
> + case DRM_FORMAT_RGBX4444:
> + case DRM_FORMAT_BGRX4444:
> + case DRM_FORMAT_ARGB4444:
> + case DRM_FORMAT_ABGR4444:
> + case DRM_FORMAT_RGBA4444:
> + case DRM_FORMAT_BGRA4444:
> + case DRM_FORMAT_XRGB1555:
> + case DRM_FORMAT_XBGR1555:
> + case DRM_FORMAT_RGBX5551:
> + case DRM_FORMAT_BGRX5551:
> + case DRM_FORMAT_ARGB1555:
> + case DRM_FORMAT_ABGR1555:
> + case DRM_FORMAT_RGBA5551:
> + case DRM_FORMAT_BGRA5551:
> + case DRM_FORMAT_RGB565:
> + case DRM_FORMAT_BGR565:
> + case DRM_FORMAT_RGB888:
> + case DRM_FORMAT_BGR888:
> + case DRM_FORMAT_XRGB8888:
> + case DRM_FORMAT_XBGR8888:
> + case DRM_FORMAT_RGBX8888:
> + case DRM_FORMAT_BGRX8888:
> + case DRM_FORMAT_ARGB8888:
> + case DRM_FORMAT_ABGR8888:
> + case DRM_FORMAT_RGBA8888:
> + case DRM_FORMAT_BGRA8888:
> + case DRM_FORMAT_XRGB2101010:
> + case DRM_FORMAT_XBGR2101010:
> + case DRM_FORMAT_RGBX1010102:
> + case DRM_FORMAT_BGRX1010102:
> + case DRM_FORMAT_ARGB2101010:
> + case DRM_FORMAT_ABGR2101010:
> + case DRM_FORMAT_RGBA1010102:
> + case DRM_FORMAT_BGRA1010102:
> + case DRM_FORMAT_YUYV:
> + case DRM_FORMAT_YVYU:
> + case DRM_FORMAT_UYVY:
> + case DRM_FORMAT_VYUY:
> + case DRM_FORMAT_AYUV:
> + case DRM_FORMAT_NV12:
> + case DRM_FORMAT_NV21:
> + case DRM_FORMAT_NV16:
> + case DRM_FORMAT_NV61:
> + case DRM_FORMAT_NV24:
> + case DRM_FORMAT_NV42:
> + case DRM_FORMAT_YUV410:
> + case DRM_FORMAT_YVU410:
> + case DRM_FORMAT_YUV411:
> + case DRM_FORMAT_YVU411:
> + case DRM_FORMAT_YUV420:
> + case DRM_FORMAT_YVU420:
> + case DRM_FORMAT_YUV422:
> + case DRM_FORMAT_YVU422:
> + case DRM_FORMAT_YUV444:
> + case DRM_FORMAT_YVU444:
> + return 0;
> + default:
> + DRM_DEBUG_KMS("invalid pixel format %s\n",
> + drm_get_format_name(r->pixel_format));
> + return -EINVAL;
> + }
> +}
> +
> +static int framebuffer_check(const struct drm_mode_fb_cmd2 *r)
> +{
> + int ret, hsub, vsub, num_planes, i;
> +
> + ret = format_check(r);
> + if (ret) {
> + DRM_DEBUG_KMS("bad framebuffer format %s\n",
> + drm_get_format_name(r->pixel_format));
> + return ret;
> + }
> +
> + hsub = drm_format_horz_chroma_subsampling(r->pixel_format);
> + vsub = drm_format_vert_chroma_subsampling(r->pixel_format);
> + num_planes = drm_format_num_planes(r->pixel_format);
> +
> + if (r->width == 0 || r->width % hsub) {
> + DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width);
> + return -EINVAL;
> + }
> +
> + if (r->height == 0 || r->height % vsub) {
> + DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height);
> + return -EINVAL;
> + }
> +
> + for (i = 0; i < num_planes; i++) {
> + unsigned int width = r->width / (i != 0 ? hsub : 1);
> + unsigned int height = r->height / (i != 0 ? vsub : 1);
> + unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i);
> +
> + if (!r->handles[i]) {
> + DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i);
> + return -EINVAL;
> + }
> +
> + if ((uint64_t) width * cpp > UINT_MAX)
> + return -ERANGE;
> +
> + if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX)
> + return -ERANGE;
> +
> + if (r->pitches[i] < width * cpp) {
> + DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i);
> + return -EINVAL;
> + }
> +
> + if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) {
> + DRM_DEBUG_KMS("bad fb modifier %llu for plane %d\n",
> + r->modifier[i], i);
> + return -EINVAL;
> + }
> +
> + /* modifier specific checks: */
> + switch (r->modifier[i]) {
> + case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE:
> + /* NOTE: the pitch restriction may be lifted later if it turns
> + * out that no hw has this restriction:
> + */
> + if (r->pixel_format != DRM_FORMAT_NV12 ||
> + width % 128 || height % 32 ||
> + r->pitches[i] % 128) {
> + DRM_DEBUG_KMS("bad modifier data for plane %d\n", i);
> + return -EINVAL;
> + }
> + break;
> +
> + default:
> + break;
> + }
> + }
> +
> + for (i = num_planes; i < 4; i++) {
> + if (r->modifier[i]) {
> + DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i);
> + return -EINVAL;
> + }
> +
> + /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */
> + if (!(r->flags & DRM_MODE_FB_MODIFIERS))
> + continue;
> +
> + if (r->handles[i]) {
> + DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i);
> + return -EINVAL;
> + }
> +
> + if (r->pitches[i]) {
> + DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i);
> + return -EINVAL;
> + }
> +
> + if (r->offsets[i]) {
> + DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i);
> + return -EINVAL;
> + }
> + }
> +
> + return 0;
> +}
> +
> +struct drm_framebuffer *
> +drm_internal_framebuffer_create(struct drm_device *dev,
> + const struct drm_mode_fb_cmd2 *r,
> + struct drm_file *file_priv)
> +{
> + struct drm_mode_config *config = &dev->mode_config;
> + struct drm_framebuffer *fb;
> + int ret;
> +
> + if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) {
> + DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags);
> + return ERR_PTR(-EINVAL);
> + }
> +
> + if ((config->min_width > r->width) || (r->width > config->max_width)) {
> + DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n",
> + r->width, config->min_width, config->max_width);
> + return ERR_PTR(-EINVAL);
> + }
> + if ((config->min_height > r->height) || (r->height > config->max_height)) {
> + DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n",
> + r->height, config->min_height, config->max_height);
> + return ERR_PTR(-EINVAL);
> + }
> +
> + if (r->flags & DRM_MODE_FB_MODIFIERS &&
> + !dev->mode_config.allow_fb_modifiers) {
> + DRM_DEBUG_KMS("driver does not support fb modifiers\n");
> + return ERR_PTR(-EINVAL);
> + }
> +
> + ret = framebuffer_check(r);
> + if (ret)
> + return ERR_PTR(ret);
> +
> + fb = dev->mode_config.funcs->fb_create(dev, file_priv, r);
> + if (IS_ERR(fb)) {
> + DRM_DEBUG_KMS("could not create framebuffer\n");
> + return fb;
> + }
> +
> + return fb;
> +}
> +
> +/**
> + * drm_mode_addfb2 - add an FB to the graphics configuration
> + * @dev: drm device for the ioctl
> + * @data: data pointer for the ioctl
> + * @file_priv: drm file for the ioctl call
> + *
> + * Add a new FB to the specified CRTC, given a user request with format. This is
> + * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers
> + * and uses fourcc codes as pixel format specifiers.
> + *
> + * Called by the user via ioctl.
> + *
> + * Returns:
> + * Zero on success, negative errno on failure.
> + */
> +int drm_mode_addfb2(struct drm_device *dev,
> + void *data, struct drm_file *file_priv)
> +{
> + struct drm_mode_fb_cmd2 *r = data;
> + struct drm_framebuffer *fb;
> +
> + if (!drm_core_check_feature(dev, DRIVER_MODESET))
> + return -EINVAL;
> +
> + fb = drm_internal_framebuffer_create(dev, r, file_priv);
> + if (IS_ERR(fb))
> + return PTR_ERR(fb);
> +
> + DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
> + r->fb_id = fb->base.id;
> +
> + /* Transfer ownership to the filp for reaping on close */
> + mutex_lock(&file_priv->fbs_lock);
> + list_add(&fb->filp_head, &file_priv->fbs);
> + mutex_unlock(&file_priv->fbs_lock);
> +
> + return 0;
> +}
> +
> +struct drm_mode_rmfb_work {
> + struct work_struct work;
> + struct list_head fbs;
> +};
> +
> +static void drm_mode_rmfb_work_fn(struct work_struct *w)
> +{
> + struct drm_mode_rmfb_work *arg = container_of(w, typeof(*arg), work);
> +
> + while (!list_empty(&arg->fbs)) {
> + struct drm_framebuffer *fb =
> + list_first_entry(&arg->fbs, typeof(*fb), filp_head);
> +
> + list_del_init(&fb->filp_head);
> + drm_framebuffer_remove(fb);
> + }
> +}
> +
> +/**
> + * drm_mode_rmfb - remove an FB from the configuration
> + * @dev: drm device for the ioctl
> + * @data: data pointer for the ioctl
> + * @file_priv: drm file for the ioctl call
> + *
> + * Remove the FB specified by the user.
> + *
> + * Called by the user via ioctl.
> + *
> + * Returns:
> + * Zero on success, negative errno on failure.
> + */
> +int drm_mode_rmfb(struct drm_device *dev,
> + void *data, struct drm_file *file_priv)
> +{
> + struct drm_framebuffer *fb = NULL;
> + struct drm_framebuffer *fbl = NULL;
> + uint32_t *id = data;
> + int found = 0;
> +
> + if (!drm_core_check_feature(dev, DRIVER_MODESET))
> + return -EINVAL;
> +
> + fb = drm_framebuffer_lookup(dev, *id);
> + if (!fb)
> + return -ENOENT;
> +
> + mutex_lock(&file_priv->fbs_lock);
> + list_for_each_entry(fbl, &file_priv->fbs, filp_head)
> + if (fb == fbl)
> + found = 1;
> + if (!found) {
> + mutex_unlock(&file_priv->fbs_lock);
> + goto fail_unref;
> + }
> +
> + list_del_init(&fb->filp_head);
> + mutex_unlock(&file_priv->fbs_lock);
> +
> + /* drop the reference we picked up in framebuffer lookup */
> + drm_framebuffer_unreference(fb);
> +
> + /*
> + * we now own the reference that was stored in the fbs list
> + *
> + * drm_framebuffer_remove may fail with -EINTR on pending signals,
> + * so run this in a separate stack as there's no way to correctly
> + * handle this after the fb is already removed from the lookup table.
> + */
> + if (drm_framebuffer_read_refcount(fb) > 1) {
> + struct drm_mode_rmfb_work arg;
> +
> + INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn);
> + INIT_LIST_HEAD(&arg.fbs);
> + list_add_tail(&fb->filp_head, &arg.fbs);
> +
> + schedule_work(&arg.work);
> + flush_work(&arg.work);
> + destroy_work_on_stack(&arg.work);
> + } else
> + drm_framebuffer_unreference(fb);
> +
> + return 0;
> +
> +fail_unref:
> + drm_framebuffer_unreference(fb);
> + return -ENOENT;
> +}
> +
> +/**
> + * drm_mode_getfb - get FB info
> + * @dev: drm device for the ioctl
> + * @data: data pointer for the ioctl
> + * @file_priv: drm file for the ioctl call
> + *
> + * Lookup the FB given its ID and return info about it.
> + *
> + * Called by the user via ioctl.
> + *
> + * Returns:
> + * Zero on success, negative errno on failure.
> + */
> +int drm_mode_getfb(struct drm_device *dev,
> + void *data, struct drm_file *file_priv)
> +{
> + struct drm_mode_fb_cmd *r = data;
> + struct drm_framebuffer *fb;
> + int ret;
> +
> + if (!drm_core_check_feature(dev, DRIVER_MODESET))
> + return -EINVAL;
> +
> + fb = drm_framebuffer_lookup(dev, r->fb_id);
> + if (!fb)
> + return -ENOENT;
> +
> + r->height = fb->height;
> + r->width = fb->width;
> + r->depth = fb->depth;
> + r->bpp = fb->bits_per_pixel;
> + r->pitch = fb->pitches[0];
> + if (fb->funcs->create_handle) {
> + if (drm_is_current_master(file_priv) || capable(CAP_SYS_ADMIN) ||
> + drm_is_control_client(file_priv)) {
> + ret = fb->funcs->create_handle(fb, file_priv,
> + &r->handle);
> + } else {
> + /* GET_FB() is an unprivileged ioctl so we must not
> + * return a buffer-handle to non-master processes! For
> + * backwards-compatibility reasons, we cannot make
> + * GET_FB() privileged, so just return an invalid handle
> + * for non-masters. */
> + r->handle = 0;
> + ret = 0;
> + }
> + } else {
> + ret = -ENODEV;
> + }
> +
> + drm_framebuffer_unreference(fb);
> +
> + return ret;
> +}
> +
> +/**
> + * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB
> + * @dev: drm device for the ioctl
> + * @data: data pointer for the ioctl
> + * @file_priv: drm file for the ioctl call
> + *
> + * Lookup the FB and flush out the damaged area supplied by userspace as a clip
> + * rectangle list. Generic userspace which does frontbuffer rendering must call
> + * this ioctl to flush out the changes on manual-update display outputs, e.g.
> + * usb display-link, mipi manual update panels or edp panel self refresh modes.
> + *
> + * Modesetting drivers which always update the frontbuffer do not need to
> + * implement the corresponding ->dirty framebuffer callback.
> + *
> + * Called by the user via ioctl.
> + *
> + * Returns:
> + * Zero on success, negative errno on failure.
> + */
> +int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
> + void *data, struct drm_file *file_priv)
> +{
> + struct drm_clip_rect __user *clips_ptr;
> + struct drm_clip_rect *clips = NULL;
> + struct drm_mode_fb_dirty_cmd *r = data;
> + struct drm_framebuffer *fb;
> + unsigned flags;
> + int num_clips;
> + int ret;
> +
> + if (!drm_core_check_feature(dev, DRIVER_MODESET))
> + return -EINVAL;
> +
> + fb = drm_framebuffer_lookup(dev, r->fb_id);
> + if (!fb)
> + return -ENOENT;
> +
> + num_clips = r->num_clips;
> + clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr;
> +
> + if (!num_clips != !clips_ptr) {
> + ret = -EINVAL;
> + goto out_err1;
> + }
> +
> + flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags;
> +
> + /* If userspace annotates copy, clips must come in pairs */
> + if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) {
> + ret = -EINVAL;
> + goto out_err1;
> + }
> +
> + if (num_clips && clips_ptr) {
> + if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) {
> + ret = -EINVAL;
> + goto out_err1;
> + }
> + clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
> + if (!clips) {
> + ret = -ENOMEM;
> + goto out_err1;
> + }
> +
> + ret = copy_from_user(clips, clips_ptr,
> + num_clips * sizeof(*clips));
> + if (ret) {
> + ret = -EFAULT;
> + goto out_err2;
> + }
> + }
> +
> + if (fb->funcs->dirty) {
> + ret = fb->funcs->dirty(fb, file_priv, flags, r->color,
> + clips, num_clips);
> + } else {
> + ret = -ENOSYS;
> + }
> +
> +out_err2:
> + kfree(clips);
> +out_err1:
> + drm_framebuffer_unreference(fb);
> +
> + return ret;
> +}
> +
> +/**
> + * drm_fb_release - remove and free the FBs on this file
> + * @priv: drm file for the ioctl
> + *
> + * Destroy all the FBs associated with @filp.
> + *
> + * Called by the user via ioctl.
> + *
> + * Returns:
> + * Zero on success, negative errno on failure.
> + */
> +void drm_fb_release(struct drm_file *priv)
> +{
> + struct drm_framebuffer *fb, *tfb;
> + struct drm_mode_rmfb_work arg;
> +
> + INIT_LIST_HEAD(&arg.fbs);
> +
> + /*
> + * When the file gets released that means no one else can access the fb
> + * list any more, so no need to grab fpriv->fbs_lock. And we need to
> + * avoid upsetting lockdep since the universal cursor code adds a
> + * framebuffer while holding mutex locks.
> + *
> + * Note that a real deadlock between fpriv->fbs_lock and the modeset
> + * locks is impossible here since no one else but this function can get
> + * at it any more.
> + */
> + list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
> + if (drm_framebuffer_read_refcount(fb) > 1) {
> + list_move_tail(&fb->filp_head, &arg.fbs);
> + } else {
> + list_del_init(&fb->filp_head);
> +
> + /* This drops the fpriv->fbs reference. */
> + drm_framebuffer_unreference(fb);
> + }
> + }
> +
> + if (!list_empty(&arg.fbs)) {
> + INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn);
> +
> + schedule_work(&arg.work);
> + flush_work(&arg.work);
> + destroy_work_on_stack(&arg.work);
> + }
> +}
> +
> +/**
> + * drm_crtc_force_disable_all - Forcibly turn off all enabled CRTCs
> + * @dev: DRM device whose CRTCs to turn off
> + *
> + * Drivers may want to call this on unload to ensure that all displays are
> + * unlit and the GPU is in a consistent, low power state. Takes modeset locks.
> + *
> + * Returns:
> + * Zero on success, error code on failure.
> + */
> +int drm_crtc_force_disable_all(struct drm_device *dev)
> +{
> + struct drm_crtc *crtc;
> + int ret = 0;
> +
> + drm_modeset_lock_all(dev);
> + drm_for_each_crtc(crtc, dev)
> + if (crtc->enabled) {
> + ret = drm_crtc_force_disable(crtc);
> + if (ret)
> + goto out;
> + }
> +out:
> + drm_modeset_unlock_all(dev);
> + return ret;
> +}
> +EXPORT_SYMBOL(drm_crtc_force_disable_all);
> +
> +void drm_framebuffer_free(struct kref *kref)
> +{
> + struct drm_framebuffer *fb =
> + container_of(kref, struct drm_framebuffer, base.refcount);
> + struct drm_device *dev = fb->dev;
> +
> + /*
> + * The lookup idr holds a weak reference, which has not necessarily been
> + * removed at this point. Check for that.
> + */
> + drm_mode_object_unregister(dev, &fb->base);
> +
> + fb->funcs->destroy(fb);
> +}
> +
> +/**
> + * drm_framebuffer_init - initialize a framebuffer
> + * @dev: DRM device
> + * @fb: framebuffer to be initialized
> + * @funcs: ... with these functions
> + *
> + * Allocates an ID for the framebuffer's parent mode object, sets its mode
> + * functions & device file and adds it to the master fd list.
> + *
> + * IMPORTANT:
> + * This functions publishes the fb and makes it available for concurrent access
> + * by other users. Which means by this point the fb _must_ be fully set up -
> + * since all the fb attributes are invariant over its lifetime, no further
> + * locking but only correct reference counting is required.
> + *
> + * Returns:
> + * Zero on success, error code on failure.
> + */
> +int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
> + const struct drm_framebuffer_funcs *funcs)
> +{
> + int ret;
> +
> + INIT_LIST_HEAD(&fb->filp_head);
> + fb->dev = dev;
> + fb->funcs = funcs;
> +
> + ret = drm_mode_object_get_reg(dev, &fb->base, DRM_MODE_OBJECT_FB,
> + false, drm_framebuffer_free);
> + if (ret)
> + goto out;
> +
> + mutex_lock(&dev->mode_config.fb_lock);
> + dev->mode_config.num_fb++;
> + list_add(&fb->head, &dev->mode_config.fb_list);
> + mutex_unlock(&dev->mode_config.fb_lock);
> +
> + drm_mode_object_register(dev, &fb->base);
> +out:
> + return ret;
> +}
> +EXPORT_SYMBOL(drm_framebuffer_init);
> +
> +/**
> + * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference
> + * @dev: drm device
> + * @id: id of the fb object
> + *
> + * If successful, this grabs an additional reference to the framebuffer -
> + * callers need to make sure to eventually unreference the returned framebuffer
> + * again, using @drm_framebuffer_unreference.
> + */
> +struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
> + uint32_t id)
> +{
> + struct drm_mode_object *obj;
> + struct drm_framebuffer *fb = NULL;
> +
> + obj = __drm_mode_object_find(dev, id, DRM_MODE_OBJECT_FB);
> + if (obj)
> + fb = obj_to_fb(obj);
> + return fb;
> +}
> +EXPORT_SYMBOL(drm_framebuffer_lookup);
> +
> +/**
> + * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr
> + * @fb: fb to unregister
> + *
> + * Drivers need to call this when cleaning up driver-private framebuffers, e.g.
> + * those used for fbdev. Note that the caller must hold a reference of it's own,
> + * i.e. the object may not be destroyed through this call (since it'll lead to a
> + * locking inversion).
> + */
> +void drm_framebuffer_unregister_private(struct drm_framebuffer *fb)
> +{
> + struct drm_device *dev;
> +
> + if (!fb)
> + return;
> +
> + dev = fb->dev;
> +
> + /* Mark fb as reaped and drop idr ref. */
> + drm_mode_object_unregister(dev, &fb->base);
> +}
> +EXPORT_SYMBOL(drm_framebuffer_unregister_private);
> +
> +/**
> + * drm_framebuffer_cleanup - remove a framebuffer object
> + * @fb: framebuffer to remove
> + *
> + * Cleanup framebuffer. This function is intended to be used from the drivers
> + * ->destroy callback. It can also be used to clean up driver private
> + * framebuffers embedded into a larger structure.
> + *
> + * Note that this function does not remove the fb from active usuage - if it is
> + * still used anywhere, hilarity can ensue since userspace could call getfb on
> + * the id and get back -EINVAL. Obviously no concern at driver unload time.
> + *
> + * Also, the framebuffer will not be removed from the lookup idr - for
> + * user-created framebuffers this will happen in in the rmfb ioctl. For
> + * driver-private objects (e.g. for fbdev) drivers need to explicitly call
> + * drm_framebuffer_unregister_private.
> + */
> +void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
> +{
> + struct drm_device *dev = fb->dev;
> +
> + mutex_lock(&dev->mode_config.fb_lock);
> + list_del(&fb->head);
> + dev->mode_config.num_fb--;
> + mutex_unlock(&dev->mode_config.fb_lock);
> +}
> +EXPORT_SYMBOL(drm_framebuffer_cleanup);
> +
> +/**
> + * drm_framebuffer_remove - remove and unreference a framebuffer object
> + * @fb: framebuffer to remove
> + *
> + * Scans all the CRTCs and planes in @dev's mode_config. If they're
> + * using @fb, removes it, setting it to NULL. Then drops the reference to the
> + * passed-in framebuffer. Might take the modeset locks.
> + *
> + * Note that this function optimizes the cleanup away if the caller holds the
> + * last reference to the framebuffer. It is also guaranteed to not take the
> + * modeset locks in this case.
> + */
> +void drm_framebuffer_remove(struct drm_framebuffer *fb)
> +{
> + struct drm_device *dev;
> + struct drm_crtc *crtc;
> + struct drm_plane *plane;
> +
> + if (!fb)
> + return;
> +
> + dev = fb->dev;
> +
> + WARN_ON(!list_empty(&fb->filp_head));
> +
> + /*
> + * drm ABI mandates that we remove any deleted framebuffers from active
> + * useage. But since most sane clients only remove framebuffers they no
> + * longer need, try to optimize this away.
> + *
> + * Since we're holding a reference ourselves, observing a refcount of 1
> + * means that we're the last holder and can skip it. Also, the refcount
> + * can never increase from 1 again, so we don't need any barriers or
> + * locks.
> + *
> + * Note that userspace could try to race with use and instate a new
> + * usage _after_ we've cleared all current ones. End result will be an
> + * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot
> + * in this manner.
> + */
> + if (drm_framebuffer_read_refcount(fb) > 1) {
> + if (dev->mode_config.funcs->atomic_commit) {
> + drm_atomic_remove_fb(fb);
> + goto out;
> + }
> +
> + drm_modeset_lock_all(dev);
> + /* remove from any CRTC */
> + drm_for_each_crtc(crtc, dev) {
> + if (crtc->primary->fb == fb) {
> + /* should turn off the crtc */
> + if (drm_crtc_force_disable(crtc))
> + DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
> + }
> + }
> +
> + drm_for_each_plane(plane, dev) {
> + if (plane->fb == fb)
> + drm_plane_force_disable(plane);
> + }
> + drm_modeset_unlock_all(dev);
> + }
> +
> +out:
> + drm_framebuffer_unreference(fb);
> +}
> +EXPORT_SYMBOL(drm_framebuffer_remove);
> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> index 52edecef5325..e973b54c1e9f 100644
> --- a/include/drm/drm_crtc.h
> +++ b/include/drm/drm_crtc.h
> @@ -35,10 +35,12 @@
> #include <uapi/drm/drm_mode.h>
> #include <uapi/drm/drm_fourcc.h>
> #include <drm/drm_modeset_lock.h>
> +#include <drm/drm_modeset.h>
> +#include <drm/drm_framebuffer.h>
> +#include <drm/drm_modes.h>
>
> struct drm_device;
> struct drm_mode_set;
> -struct drm_framebuffer;
> struct drm_object_properties;
> struct drm_file;
> struct drm_clip_rect;
> @@ -46,14 +48,6 @@ struct device_node;
> struct fence;
> struct edid;
>
> -struct drm_mode_object {
> - uint32_t id;
> - uint32_t type;
> - struct drm_object_properties *properties;
> - struct kref refcount;
> - void (*free_cb)(struct kref *kref);
> -};
> -
> #define DRM_OBJECT_MAX_PROPERTY 24
> struct drm_object_properties {
> int count, atomic_count;
> @@ -92,15 +86,6 @@ static inline uint64_t I642U64(int64_t val)
> #define DRM_REFLECT_X 4
> #define DRM_REFLECT_Y 5
>
> -enum drm_connector_force {
> - DRM_FORCE_UNSPECIFIED,
> - DRM_FORCE_OFF,
> - DRM_FORCE_ON, /* force on analog part normally */
> - DRM_FORCE_ON_DIGITAL, /* for DVI-I use digital connector */
> -};
> -
> -#include <drm/drm_modes.h>
> -
> enum drm_connector_status {
> connector_status_connected = 1,
> connector_status_disconnected = 2,
> @@ -164,101 +149,6 @@ struct drm_tile_group {
> u8 group_data[8];
> };
>
> -/**
> - * struct drm_framebuffer_funcs - framebuffer hooks
> - */
> -struct drm_framebuffer_funcs {
> - /**
> - * @destroy:
> - *
> - * Clean up framebuffer resources, specifically also unreference the
> - * backing storage. The core guarantees to call this function for every
> - * framebuffer successfully created by ->fb_create() in
> - * &drm_mode_config_funcs. Drivers must also call
> - * drm_framebuffer_cleanup() to release DRM core resources for this
> - * framebuffer.
> - */
> - void (*destroy)(struct drm_framebuffer *framebuffer);
> -
> - /**
> - * @create_handle:
> - *
> - * Create a buffer handle in the driver-specific buffer manager (either
> - * GEM or TTM) valid for the passed-in struct &drm_file. This is used by
> - * the core to implement the GETFB IOCTL, which returns (for
> - * sufficiently priviledged user) also a native buffer handle. This can
> - * be used for seamless transitions between modesetting clients by
> - * copying the current screen contents to a private buffer and blending
> - * between that and the new contents.
> - *
> - * GEM based drivers should call drm_gem_handle_create() to create the
> - * handle.
> - *
> - * RETURNS:
> - *
> - * 0 on success or a negative error code on failure.
> - */
> - int (*create_handle)(struct drm_framebuffer *fb,
> - struct drm_file *file_priv,
> - unsigned int *handle);
> - /**
> - * @dirty:
> - *
> - * Optional callback for the dirty fb IOCTL.
> - *
> - * Userspace can notify the driver via this callback that an area of the
> - * framebuffer has changed and should be flushed to the display
> - * hardware. This can also be used internally, e.g. by the fbdev
> - * emulation, though that's not the case currently.
> - *
> - * See documentation in drm_mode.h for the struct drm_mode_fb_dirty_cmd
> - * for more information as all the semantics and arguments have a one to
> - * one mapping on this function.
> - *
> - * RETURNS:
> - *
> - * 0 on success or a negative error code on failure.
> - */
> - int (*dirty)(struct drm_framebuffer *framebuffer,
> - struct drm_file *file_priv, unsigned flags,
> - unsigned color, struct drm_clip_rect *clips,
> - unsigned num_clips);
> -};
> -
> -struct drm_framebuffer {
> - struct drm_device *dev;
> - /*
> - * Note that the fb is refcounted for the benefit of driver internals,
> - * for example some hw, disabling a CRTC/plane is asynchronous, and
> - * scanout does not actually complete until the next vblank. So some
> - * cleanup (like releasing the reference(s) on the backing GEM bo(s))
> - * should be deferred. In cases like this, the driver would like to
> - * hold a ref to the fb even though it has already been removed from
> - * userspace perspective.
> - * The refcount is stored inside the mode object.
> - */
> - /*
> - * Place on the dev->mode_config.fb_list, access protected by
> - * dev->mode_config.fb_lock.
> - */
> - struct list_head head;
> - struct drm_mode_object base;
> - const struct drm_framebuffer_funcs *funcs;
> - unsigned int pitches[4];
> - unsigned int offsets[4];
> - uint64_t modifier[4];
> - unsigned int width;
> - unsigned int height;
> - /* depth can be 15 or 16 */
> - unsigned int depth;
> - int bits_per_pixel;
> - int flags;
> - uint32_t pixel_format; /* fourcc format */
> - int hot_x;
> - int hot_y;
> - struct list_head filp_head;
> -};
> -
> struct drm_property_blob {
> struct drm_mode_object base;
> struct drm_device *dev;
> @@ -2874,14 +2764,6 @@ extern int drm_object_property_set_value(struct drm_mode_object *obj,
> extern int drm_object_property_get_value(struct drm_mode_object *obj,
> struct drm_property *property,
> uint64_t *value);
> -extern int drm_framebuffer_init(struct drm_device *dev,
> - struct drm_framebuffer *fb,
> - const struct drm_framebuffer_funcs *funcs);
> -extern struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
> - uint32_t id);
> -extern void drm_framebuffer_remove(struct drm_framebuffer *fb);
> -extern void drm_framebuffer_cleanup(struct drm_framebuffer *fb);
> -extern void drm_framebuffer_unregister_private(struct drm_framebuffer *fb);
>
> extern void drm_object_attach_property(struct drm_mode_object *obj,
> struct drm_property *property,
> @@ -2962,11 +2844,6 @@ int drm_plane_create_zpos_immutable_property(struct drm_plane *plane,
> unsigned int zpos);
>
> /* Helpers */
> -struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
> - uint32_t id, uint32_t type);
> -void drm_mode_object_reference(struct drm_mode_object *obj);
> -void drm_mode_object_unreference(struct drm_mode_object *obj);
> -
> static inline struct drm_plane *drm_plane_find(struct drm_device *dev,
> uint32_t id)
> {
> @@ -3035,39 +2912,6 @@ static inline uint32_t drm_color_lut_extract(uint32_t user_input,
> }
>
> /**
> - * drm_framebuffer_reference - incr the fb refcnt
> - * @fb: framebuffer
> - *
> - * This functions increments the fb's refcount.
> - */
> -static inline void drm_framebuffer_reference(struct drm_framebuffer *fb)
> -{
> - drm_mode_object_reference(&fb->base);
> -}
> -
> -/**
> - * drm_framebuffer_unreference - unref a framebuffer
> - * @fb: framebuffer to unref
> - *
> - * This functions decrements the fb's refcount and frees it if it drops to zero.
> - */
> -static inline void drm_framebuffer_unreference(struct drm_framebuffer *fb)
> -{
> - drm_mode_object_unreference(&fb->base);
> -}
> -
> -/**
> - * drm_framebuffer_read_refcount - read the framebuffer reference count.
> - * @fb: framebuffer
> - *
> - * This functions returns the framebuffer's reference count.
> - */
> -static inline uint32_t drm_framebuffer_read_refcount(struct drm_framebuffer *fb)
> -{
> - return atomic_read(&fb->base.refcount.refcount);
> -}
> -
> -/**
> * drm_connector_reference - incr the connector refcnt
> * @connector: connector
> *
> diff --git a/include/drm/drm_framebuffer.h b/include/drm/drm_framebuffer.h
> new file mode 100644
> index 000000000000..46abdace8fa5
> --- /dev/null
> +++ b/include/drm/drm_framebuffer.h
> @@ -0,0 +1,170 @@
> +/*
> + * Copyright (c) 2016 Intel Corporation
> + *
> + * Permission to use, copy, modify, distribute, and sell this software and its
> + * documentation for any purpose is hereby granted without fee, provided that
> + * the above copyright notice appear in all copies and that both that copyright
> + * notice and this permission notice appear in supporting documentation, and
> + * that the name of the copyright holders not be used in advertising or
> + * publicity pertaining to distribution of the software without specific,
> + * written prior permission. The copyright holders make no representations
> + * about the suitability of this software for any purpose. It is provided "as
> + * is" without express or implied warranty.
> + *
> + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
> + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
> + * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
> + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
> + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
> + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
> + * OF THIS SOFTWARE.
> + */
> +
> +#ifndef __DRM_FRAMEBUFFER_H__
> +#define __DRM_FRAMEBUFFER_H__
> +
> +#include <linux/list.h>
> +#include <linux/ctype.h>
> +#include <drm/drm_modeset.h>
> +
> +struct drm_framebuffer;
> +struct drm_file;
> +struct drm_device;
> +
> +/**
> + * struct drm_framebuffer_funcs - framebuffer hooks
> + */
> +struct drm_framebuffer_funcs {
> + /**
> + * @destroy:
> + *
> + * Clean up framebuffer resources, specifically also unreference the
> + * backing storage. The core guarantees to call this function for every
> + * framebuffer successfully created by ->fb_create() in
> + * &drm_mode_config_funcs. Drivers must also call
> + * drm_framebuffer_cleanup() to release DRM core resources for this
> + * framebuffer.
> + */
> + void (*destroy)(struct drm_framebuffer *framebuffer);
> +
> + /**
> + * @create_handle:
> + *
> + * Create a buffer handle in the driver-specific buffer manager (either
> + * GEM or TTM) valid for the passed-in struct &drm_file. This is used by
> + * the core to implement the GETFB IOCTL, which returns (for
> + * sufficiently priviledged user) also a native buffer handle. This can
> + * be used for seamless transitions between modesetting clients by
> + * copying the current screen contents to a private buffer and blending
> + * between that and the new contents.
> + *
> + * GEM based drivers should call drm_gem_handle_create() to create the
> + * handle.
> + *
> + * RETURNS:
> + *
> + * 0 on success or a negative error code on failure.
> + */
> + int (*create_handle)(struct drm_framebuffer *fb,
> + struct drm_file *file_priv,
> + unsigned int *handle);
> + /**
> + * @dirty:
> + *
> + * Optional callback for the dirty fb IOCTL.
> + *
> + * Userspace can notify the driver via this callback that an area of the
> + * framebuffer has changed and should be flushed to the display
> + * hardware. This can also be used internally, e.g. by the fbdev
> + * emulation, though that's not the case currently.
> + *
> + * See documentation in drm_mode.h for the struct drm_mode_fb_dirty_cmd
> + * for more information as all the semantics and arguments have a one to
> + * one mapping on this function.
> + *
> + * RETURNS:
> + *
> + * 0 on success or a negative error code on failure.
> + */
> + int (*dirty)(struct drm_framebuffer *framebuffer,
> + struct drm_file *file_priv, unsigned flags,
> + unsigned color, struct drm_clip_rect *clips,
> + unsigned num_clips);
> +};
> +
> +struct drm_framebuffer {
> + struct drm_device *dev;
> + /*
> + * Note that the fb is refcounted for the benefit of driver internals,
> + * for example some hw, disabling a CRTC/plane is asynchronous, and
> + * scanout does not actually complete until the next vblank. So some
> + * cleanup (like releasing the reference(s) on the backing GEM bo(s))
> + * should be deferred. In cases like this, the driver would like to
> + * hold a ref to the fb even though it has already been removed from
> + * userspace perspective.
> + * The refcount is stored inside the mode object.
> + */
> + /*
> + * Place on the dev->mode_config.fb_list, access protected by
> + * dev->mode_config.fb_lock.
> + */
> + struct list_head head;
> + struct drm_mode_object base;
> + const struct drm_framebuffer_funcs *funcs;
> + unsigned int pitches[4];
> + unsigned int offsets[4];
> + uint64_t modifier[4];
> + unsigned int width;
> + unsigned int height;
> + /* depth can be 15 or 16 */
> + unsigned int depth;
> + int bits_per_pixel;
> + int flags;
> + uint32_t pixel_format; /* fourcc format */
> + int hot_x;
> + int hot_y;
> + struct list_head filp_head;
> +};
> +
> +int drm_framebuffer_init(struct drm_device *dev,
> + struct drm_framebuffer *fb,
> + const struct drm_framebuffer_funcs *funcs);
> +struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
> + uint32_t id);
> +void drm_framebuffer_remove(struct drm_framebuffer *fb);
> +void drm_framebuffer_cleanup(struct drm_framebuffer *fb);
> +void drm_framebuffer_unregister_private(struct drm_framebuffer *fb);
> +
> +/**
> + * drm_framebuffer_reference - incr the fb refcnt
> + * @fb: framebuffer
> + *
> + * This functions increments the fb's refcount.
> + */
> +static inline void drm_framebuffer_reference(struct drm_framebuffer *fb)
> +{
> + drm_mode_object_reference(&fb->base);
> +}
> +
> +/**
> + * drm_framebuffer_unreference - unref a framebuffer
> + * @fb: framebuffer to unref
> + *
> + * This functions decrements the fb's refcount and frees it if it drops to zero.
> + */
> +static inline void drm_framebuffer_unreference(struct drm_framebuffer *fb)
> +{
> + drm_mode_object_unreference(&fb->base);
> +}
> +
> +/**
> + * drm_framebuffer_read_refcount - read the framebuffer reference count.
> + * @fb: framebuffer
> + *
> + * This functions returns the framebuffer's reference count.
> + */
> +static inline uint32_t drm_framebuffer_read_refcount(struct drm_framebuffer *fb)
> +{
> + return atomic_read(&fb->base.refcount.refcount);
> +}
> +#endif
> diff --git a/include/drm/drm_modes.h b/include/drm/drm_modes.h
> index ff481770d76b..f0af1edcbefe 100644
> --- a/include/drm/drm_modes.h
> +++ b/include/drm/drm_modes.h
> @@ -27,6 +27,8 @@
> #ifndef __DRM_MODES_H__
> #define __DRM_MODES_H__
>
> +#include <drm/drm_modeset.h>
> +
> /*
> * Note on terminology: here, for brevity and convenience, we refer to connector
> * control chips as 'CRTCs'. They can control any type of connector, VGA, LVDS,
> diff --git a/include/drm/drm_modeset.h b/include/drm/drm_modeset.h
> new file mode 100644
> index 000000000000..0c2b0f3c5f34
> --- /dev/null
> +++ b/include/drm/drm_modeset.h
> @@ -0,0 +1,50 @@
> +/*
> + * Copyright (c) 2016 Intel Corporation
> + *
> + * Permission to use, copy, modify, distribute, and sell this software and its
> + * documentation for any purpose is hereby granted without fee, provided that
> + * the above copyright notice appear in all copies and that both that copyright
> + * notice and this permission notice appear in supporting documentation, and
> + * that the name of the copyright holders not be used in advertising or
> + * publicity pertaining to distribution of the software without specific,
> + * written prior permission. The copyright holders make no representations
> + * about the suitability of this software for any purpose. It is provided "as
> + * is" without express or implied warranty.
> + *
> + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
> + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
> + * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
> + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
> + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
> + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
> + * OF THIS SOFTWARE.
> + */
> +
> +#ifndef __DRM_MODESET_H__
> +#define __DRM_MODESET_H__
> +
> +#include <linux/kref.h>
> +struct drm_object_properties;
> +
> +struct drm_mode_object {
> + uint32_t id;
> + uint32_t type;
> + struct drm_object_properties *properties;
> + struct kref refcount;
> + void (*free_cb)(struct kref *kref);
> +};
> +
> +struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
> + uint32_t id, uint32_t type);
> +void drm_mode_object_reference(struct drm_mode_object *obj);
> +void drm_mode_object_unreference(struct drm_mode_object *obj);
> +
> +/* FIXME: This is temporary until we have a drm_connector.h */
> +enum drm_connector_force {
> + DRM_FORCE_UNSPECIFIED,
> + DRM_FORCE_OFF,
> + DRM_FORCE_ON, /* force on analog part normally */
> + DRM_FORCE_ON_DIGITAL, /* for DVI-I use digital connector */
> +};
> +
> +#endif
> --
> 2.8.1
>
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