hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

drm/fence: add out-fences support 

Support DRM out-fences by creating a sync_file with a fence for each CRTC
that sets the OUT_FENCE_PTR property.

We use the out_fence pointer received in the OUT_FENCE_PTR prop to send
the sync_file fd back to userspace.

The sync_file and fd are allocated/created before commit, but the
fd_install operation only happens after we know that commit succeed.

v2: Comment by Rob Clark:
	- Squash commit that adds DRM_MODE_ATOMIC_OUT_FENCE flag here.

    Comment by Daniel Vetter:
	- Add clean up code for out_fences

v3: Comments by Daniel Vetter:
	- create DRM_MODE_ATOMIC_EVENT_MASK
	- userspace should fill out_fences_ptr with the crtc_ids for which
	it wants fences back.

v4: Create OUT_FENCE_PTR properties and remove old approach.

v5: Comments by Brian Starkey:
	- Remove extra fence_get() in atomic_ioctl()
	- Check ret before iterating on the crtc_state
	- check ret before fd_install
	- set fence_state to NULL at the beginning
	- check fence_state->out_fence_ptr before put_user()
	- change order of fput() and put_unused_fd() on failure

     - Add access_ok() check to the out_fence_ptr received
     - Rebase after fence -> dma_fence rename
     - Store out_fence_ptr in the drm_atomic_state
     - Split crtc_setup_out_fence()
     - return -1 as out_fence with TEST_ONLY flag

v6: Comments by Daniel Vetter
	- Add prepare/unprepare_crtc_signaling()
	- move struct drm_out_fence_state to drm_atomic.c
	- mark get_crtc_fence() as static

    Comments by Brian Starkey
	- proper set fence_ptr fence_state array
	- isolate fence_idx increment

    - improve error handling

v7: Comments by Daniel Vetter
	- remove prefix from internal functions
	- make out_fence_ptr an s64 pointer
	- degrade DRM_INFO to DRM_DEBUG_ATOMIC when put_user fail
	- fix doc issues
	- filter out OUT_FENCE_PTR == NULL and do not fail in this case
	- add complete_crtc_signalling()
	- krealloc fence_state on demand

    Comment by Brian Starkey
	- remove unused crtc_state arg from get_out_fence()

v8: Comment by Brian Starkey
	- cancel events before check for !fence_state
	- convert a few lefovers u64 types for out_fence_ptr
	- fix memleak by assign fence_state earlier after realloc
	- proper accout num_fences in case of error

v9: Comment by Brian Starkey
	- memset last position of fence_state after krealloc
    Comments by Sean Paul
	- pass install_fds in complete_crtc_signaling() instead of ret

     - put_user(-1, fence_ptr) when decoding props

v10: Comment by Brian Starkey
	- remove unneeded num_fences increment on error path
	- kfree fence_state after installing fences fd

v11: rebase against latest drm-misc

v12: rebase again against latest drm-misc

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Brian Starkey <brian.starkey@arm.com> (v10)
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Tested-by: Robert Foss <robert.foss@collabora.com> (v10)
[danvet: Appease checkpatch.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1479301221-13056-1-git-send-email-gustavo@padovan.org
This commit is contained in:
Gustavo Padovan 2016-11-16 22:00:21 +09:00 committed by Daniel Vetter
parent 6d6003c4b6
commit beaf5af480
5 changed files with 211 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

239
drivers/gpu/drm/drm_atomic.c
View File

@ -290,6 +290,23 @@ drm_atomic_get_crtc_state(struct drm_atomic_state *state,
}
EXPORT_SYMBOL(drm_atomic_get_crtc_state);
static void set_out_fence_for_crtc(struct drm_atomic_state *state,
struct drm_crtc *crtc, s64 __user *fence_ptr)
{
state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr;
}
static s64 __user *get_out_fence_for_crtc(struct drm_atomic_state *state,
struct drm_crtc *crtc)
{
s64 __user *fence_ptr;
fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr;
state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL;
return fence_ptr;
}
/**
* drm_atomic_set_mode_for_crtc - set mode for CRTC
* @state: the CRTC whose incoming state to update
@ -494,6 +511,16 @@ int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
&replaced);
state->color_mgmt_changed |= replaced;
return ret;
} else if (property == config->prop_out_fence_ptr) {
s64 __user *fence_ptr = u64_to_user_ptr(val);
if (!fence_ptr)
return 0;
if (put_user(-1, fence_ptr))
return -EFAULT;
set_out_fence_for_crtc(state->state, crtc, fence_ptr);
} else if (crtc->funcs->atomic_set_property)
return crtc->funcs->atomic_set_property(crtc, state, property, val);
else
@ -536,6 +563,8 @@ drm_atomic_crtc_get_property(struct drm_crtc *crtc,
*val = (state->ctm) ? state->ctm->base.id : 0;
else if (property == config->gamma_lut_property)
*val = (state->gamma_lut) ? state->gamma_lut->base.id : 0;
else if (property == config->prop_out_fence_ptr)
*val = 0;
else if (crtc->funcs->atomic_get_property)
return crtc->funcs->atomic_get_property(crtc, state, property, val);
else
@ -1664,11 +1693,9 @@ int drm_atomic_debugfs_init(struct drm_minor *minor)
*/
static struct drm_pending_vblank_event *create_vblank_event(
struct drm_device *dev, struct drm_file *file_priv,
struct dma_fence *fence, uint64_t user_data)
struct drm_device *dev, uint64_t user_data)
{
struct drm_pending_vblank_event *e = NULL;
int ret;
e = kzalloc(sizeof *e, GFP_KERNEL);
if (!e)
@ -1678,17 +1705,6 @@ static struct drm_pending_vblank_event *create_vblank_event(
e->event.base.length = sizeof(e->event);
e->event.user_data = user_data;
if (file_priv) {
ret = drm_event_reserve_init(dev, file_priv, &e->base,
&e->event.base);
if (ret) {
kfree(e);
return NULL;
}
}
e->base.fence = fence;
return e;
}
@ -1793,6 +1809,165 @@ void drm_atomic_clean_old_fb(struct drm_device *dev,
}
EXPORT_SYMBOL(drm_atomic_clean_old_fb);
static struct dma_fence *get_crtc_fence(struct drm_crtc *crtc)
{
struct dma_fence *fence;
fence = kzalloc(sizeof(*fence), GFP_KERNEL);
if (!fence)
return NULL;
dma_fence_init(fence, &drm_crtc_fence_ops, &crtc->fence_lock,
crtc->fence_context, ++crtc->fence_seqno);
return fence;
}
struct drm_out_fence_state {
s64 __user *out_fence_ptr;
struct sync_file *sync_file;
int fd;
};
static int setup_out_fence(struct drm_out_fence_state *fence_state,
struct dma_fence *fence)
{
fence_state->fd = get_unused_fd_flags(O_CLOEXEC);
if (fence_state->fd < 0)
return fence_state->fd;
if (put_user(fence_state->fd, fence_state->out_fence_ptr))
return -EFAULT;
fence_state->sync_file = sync_file_create(fence);
if (!fence_state->sync_file)
return -ENOMEM;
return 0;
}
static int prepare_crtc_signaling(struct drm_device *dev,
struct drm_atomic_state *state,
struct drm_mode_atomic *arg,
struct drm_file *file_priv,
struct drm_out_fence_state **fence_state,
unsigned int *num_fences)
{
struct drm_crtc *crtc;
struct drm_crtc_state *crtc_state;
int i, ret;
if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)
return 0;
for_each_crtc_in_state(state, crtc, crtc_state, i) {
u64 __user *fence_ptr;
fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc);
if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) {
struct drm_pending_vblank_event *e;
e = create_vblank_event(dev, arg->user_data);
if (!e)
return -ENOMEM;
crtc_state->event = e;
}
if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
struct drm_pending_vblank_event *e = crtc_state->event;
if (!file_priv)
continue;
ret = drm_event_reserve_init(dev, file_priv, &e->base,
&e->event.base);
if (ret) {
kfree(e);
crtc_state->event = NULL;
return ret;
}
}
if (fence_ptr) {
struct dma_fence *fence;
struct drm_out_fence_state *f;
f = krealloc(*fence_state, sizeof(**fence_state) *
(*num_fences + 1), GFP_KERNEL);
if (!f)
return -ENOMEM;
memset(&f[*num_fences], 0, sizeof(*f));
f[*num_fences].out_fence_ptr = fence_ptr;
*fence_state = f;
fence = get_crtc_fence(crtc);
if (!fence)
return -ENOMEM;
ret = setup_out_fence(&f[(*num_fences)++], fence);
if (ret) {
dma_fence_put(fence);
return ret;
}
crtc_state->event->base.fence = fence;
}
}
return 0;
}
static void complete_crtc_signaling(struct drm_device *dev,
struct drm_atomic_state *state,
struct drm_out_fence_state *fence_state,
unsigned int num_fences,
bool install_fds)
{
struct drm_crtc *crtc;
struct drm_crtc_state *crtc_state;
int i;
if (install_fds) {
for (i = 0; i < num_fences; i++)
fd_install(fence_state[i].fd,
fence_state[i].sync_file->file);
kfree(fence_state);
return;
}
for_each_crtc_in_state(state, crtc, crtc_state, i) {
/*
* TEST_ONLY and PAGE_FLIP_EVENT are mutually
* exclusive, if they weren't, this code should be
* called on success for TEST_ONLY too.
*/
if (crtc_state->event)
drm_event_cancel_free(dev, &crtc_state->event->base);
}
if (!fence_state)
return;
for (i = 0; i < num_fences; i++) {
if (fence_state[i].sync_file)
fput(fence_state[i].sync_file->file);
if (fence_state[i].fd >= 0)
put_unused_fd(fence_state[i].fd);
/* If this fails log error to the user */
if (fence_state[i].out_fence_ptr &&
put_user(-1, fence_state[i].out_fence_ptr))
DRM_DEBUG_ATOMIC("Couldn't clear out_fence_ptr\n");
}
kfree(fence_state);
}
int drm_mode_atomic_ioctl(struct drm_device *dev,
void *data, struct drm_file *file_priv)
{
@ -1805,11 +1980,10 @@ int drm_mode_atomic_ioctl(struct drm_device *dev,
struct drm_atomic_state *state;
struct drm_modeset_acquire_ctx ctx;
struct drm_plane *plane;
struct drm_crtc *crtc;
struct drm_crtc_state *crtc_state;
struct drm_out_fence_state *fence_state = NULL;
unsigned plane_mask;
int ret = 0;
unsigned int i, j;
unsigned int i, j, num_fences = 0;
/* disallow for drivers not supporting atomic: */
if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
@ -1924,20 +2098,10 @@ retry:
drm_mode_object_unreference(obj);
}
if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
for_each_crtc_in_state(state, crtc, crtc_state, i) {
struct drm_pending_vblank_event *e;
e = create_vblank_event(dev, file_priv, NULL,
arg->user_data);
if (!e) {
ret = -ENOMEM;
ret = prepare_crtc_signaling(dev, state, arg, file_priv, &fence_state,
&num_fences);
if (ret)
goto out;
}
crtc_state->event = e;
}
}
if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) {
/*
@ -1957,20 +2121,7 @@ retry:
out:
drm_atomic_clean_old_fb(dev, plane_mask, ret);
if (ret && arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
/*
* TEST_ONLY and PAGE_FLIP_EVENT are mutually exclusive,
* if they weren't, this code should be called on success
* for TEST_ONLY too.
*/
for_each_crtc_in_state(state, crtc, crtc_state, i) {
if (!crtc_state->event)
continue;
drm_event_cancel_free(dev, &crtc_state->event->base);
}
}
complete_crtc_signaling(dev, state, fence_state, num_fences, !ret);
if (ret == -EDEADLK) {
drm_atomic_state_clear(state);

2
drivers/gpu/drm/drm_crtc.c
View File

@ -267,6 +267,8 @@ int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
drm_object_attach_property(&crtc->base, config->prop_active, 0);
drm_object_attach_property(&crtc->base, config->prop_mode_id, 0);
drm_object_attach_property(&crtc->base,
config->prop_out_fence_ptr, 0);
}
return 0;

6
drivers/gpu/drm/drm_mode_config.c
View File

@ -314,6 +314,12 @@ static int drm_mode_create_standard_properties(struct drm_device *dev)
return -ENOMEM;
dev->mode_config.prop_in_fence_fd = prop;
prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
"OUT_FENCE_PTR", 0, U64_MAX);
if (!prop)
return -ENOMEM;
dev->mode_config.prop_out_fence_ptr = prop;
prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
"CRTC_ID", DRM_MODE_OBJECT_CRTC);
if (!prop)

1
include/drm/drm_atomic.h
View File

@ -144,6 +144,7 @@ struct __drm_crtcs_state {
struct drm_crtc *ptr;
struct drm_crtc_state *state;
struct drm_crtc_commit *commit;
s64 __user *out_fence_ptr;
};
struct __drm_connnectors_state {

6
include/drm/drm_mode_config.h
View File

@ -485,6 +485,12 @@ struct drm_mode_config {
* for a Plane.
*/
struct drm_property *prop_in_fence_fd;
/**
* @prop_out_fence_ptr: Sync File fd pointer representing the
* outgoing fences for a CRTC. Userspace should provide a pointer to a
* value of type s64, and then cast that pointer to u64.
*/
struct drm_property *prop_out_fence_ptr;
/**
* @prop_crtc_id: Default atomic plane property to specify the
* &drm_crtc.