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drm: Extract drm_framebuffer.[hc]

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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.

v2: Rebase.

v3: Move drm_crtc_force_disable_all back again, that wasn't meant to
be moved (Sean).

v4: Rebase.

Cc: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2016-08-15 16:07:02 +02:00
parent 5d070be683
commit 7520a277d9
9 changed files with 1075 additions and 958 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
Documentation/gpu/drm-kms.rst
View File

@ -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
===================

3
drivers/gpu/drm/Makefile
View File

@ -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

801
drivers/gpu/drm/drm_crtc.c
View File

@ -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);
@ -435,199 +431,6 @@ out:
}
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)
@ -3011,7 +2814,7 @@ 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);
@ -3209,581 +3012,6 @@ 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;
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)
@ -4496,7 +3724,7 @@ 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;
@ -4892,7 +4120,8 @@ 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;
}

40
drivers/gpu/drm/drm_crtc_internal.h
View File

@ -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);

796
drivers/gpu/drm/drm_framebuffer.c Normal file
View File

@ -0,0 +1,796 @@
/*
* 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);

162
include/drm/drm_crtc.h
View File

@ -36,10 +36,12 @@
#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;
@ -47,14 +49,6 @@ 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;
@ -94,15 +88,6 @@ static inline uint64_t I642U64(int64_t val)
#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,
@ -166,101 +151,6 @@ 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;
@ -2888,14 +2778,6 @@ 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,
@ -2976,11 +2858,6 @@ 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)
{
@ -3048,39 +2925,6 @@ static inline uint32_t drm_color_lut_extract(uint32_t user_input,
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

170
include/drm/drm_framebuffer.h Normal file
View File

@ -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

2
include/drm/drm_modes.h
View File

@ -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,

50
include/drm/drm_modeset.h Normal file
View File

@ -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