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
===================
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
#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) \
* 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;
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);
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;
{
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);
}
EXPORT_SYMBOL(drm_crtc_force_disable_all);
-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) {
- 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);
- }
-
- 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)
*/
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);
}
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;
- char *format_name;
-
- 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:
- format_name = drm_get_format_name(r->pixel_format);
- DRM_DEBUG_KMS("invalid pixel format %s\n", format_name);
- kfree(format_name);
- 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) {
- char *format_name = drm_get_format_name(r->pixel_format);
- DRM_DEBUG_KMS("bad framebuffer format %s\n", format_name);
- kfree(format_name);
- 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)
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;
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;
}
/* 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,
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);
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);
--- /dev/null
+/*
+ * 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;
+ char *format_name;
+
+ 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:
+ format_name = drm_get_format_name(r->pixel_format);
+ DRM_DEBUG_KMS("invalid pixel format %s\n", format_name);
+ kfree(format_name);
+ 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) {
+ char *format_name = drm_get_format_name(r->pixel_format);
+ DRM_DEBUG_KMS("bad framebuffer format %s\n", format_name);
+ kfree(format_name);
+ 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);
+ }
+}
+
+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) {
+ 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);
+ }
+
+ drm_framebuffer_unreference(fb);
+}
+EXPORT_SYMBOL(drm_framebuffer_remove);
#include <uapi/drm/drm_fourcc.h>
#include <drm/drm_modeset_lock.h>
#include <drm/drm_rect.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;
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;
#define DRM_REFLECT_Y BIT(5)
#define DRM_REFLECT_MASK (DRM_REFLECT_X | DRM_REFLECT_Y)
-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,
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;
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,
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)
{
return clamp_val(val, 0, max);
}
-/**
- * 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
--- /dev/null
+/*
+ * 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
#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,
--- /dev/null
+/*
+ * 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
projects / cascardo / linux.git / commitdiff