| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1453901439-19467-3-git-send-email-gustavo@padovan.org>
Date: Wed, 27 Jan 2016 11:30:30 -0200
From: Gustavo Padovan <gustavo@...ovan.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org,
dri-devel@...ts.freedesktop.org,
Daniel Stone <daniels@...labora.com>,
Arve Hjønnevåg <arve@...roid.com>,
Riley Andrews <riandrews@...roid.com>,
Daniel Vetter <daniel.vetter@...ll.ch>,
Rob Clark <robdclark@...il.com>,
Greg Hackmann <ghackmann@...gle.com>,
John Harrison <John.C.Harrison@...el.com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Gustavo Padovan <gustavo.padovan@...labora.co.uk>
Subject: [PATCH v2 02/11] staging/android: store last signaled value on sync timeline
From: Gustavo Padovan <gustavo.padovan@...labora.co.uk>
Now fence timeline is aware of the last signaled fence, as it
receives the increment to the current value in sync_timeline_signal().
That allow us to remove .has_signaled() from timeline_ops as we can
directly compare using timeline->value and fence->seqno in sync.c
Signed-off-by: Gustavo Padovan <gustavo.padovan@...labora.co.uk>
---
drivers/staging/android/sw_sync.c | 16 ++--------------
drivers/staging/android/sync.c | 15 +++++++--------
drivers/staging/android/sync.h | 14 +++++---------
3 files changed, 14 insertions(+), 31 deletions(-)
diff --git a/drivers/staging/android/sw_sync.c b/drivers/staging/android/sw_sync.c
index 3bee959..b9d53d3 100644
--- a/drivers/staging/android/sw_sync.c
+++ b/drivers/staging/android/sw_sync.c
@@ -30,7 +30,7 @@ struct fence *sw_sync_pt_create(struct sw_sync_timeline *obj, u32 value)
struct sw_sync_pt *pt;
pt = (struct sw_sync_pt *)
- sync_pt_create(&obj->obj, sizeof(struct sw_sync_pt));
+ sync_pt_create(&obj->obj, sizeof(struct sw_sync_pt), value);
pt->value = value;
@@ -38,15 +38,6 @@ struct fence *sw_sync_pt_create(struct sw_sync_timeline *obj, u32 value)
}
EXPORT_SYMBOL(sw_sync_pt_create);
-static int sw_sync_fence_has_signaled(struct fence *fence)
-{
- struct sw_sync_pt *pt = (struct sw_sync_pt *)fence;
- struct sw_sync_timeline *obj =
- (struct sw_sync_timeline *)fence_parent(fence);
-
- return (pt->value > obj->value) ? 0 : 1;
-}
-
static int sw_sync_fill_driver_data(struct fence *fence,
void *data, int size)
{
@@ -77,7 +68,6 @@ static void sw_sync_fence_value_str(struct fence *fence, char *str, int size)
static struct sync_timeline_ops sw_sync_timeline_ops = {
.driver_name = "sw_sync",
- .has_signaled = sw_sync_fence_has_signaled,
.fill_driver_data = sw_sync_fill_driver_data,
.timeline_value_str = sw_sync_timeline_value_str,
.fence_value_str = sw_sync_fence_value_str,
@@ -96,8 +86,6 @@ EXPORT_SYMBOL(sw_sync_timeline_create);
void sw_sync_timeline_inc(struct sw_sync_timeline *obj, u32 inc)
{
- obj->value += inc;
-
- sync_timeline_signal(&obj->obj);
+ sync_timeline_signal(&obj->obj, inc);
}
EXPORT_SYMBOL(sw_sync_timeline_inc);
diff --git a/drivers/staging/android/sync.c b/drivers/staging/android/sync.c
index 1e1c009..4eea5c3 100644
--- a/drivers/staging/android/sync.c
+++ b/drivers/staging/android/sync.c
@@ -90,7 +90,7 @@ void sync_timeline_destroy(struct sync_timeline *obj)
}
EXPORT_SYMBOL(sync_timeline_destroy);
-void sync_timeline_signal(struct sync_timeline *obj)
+void sync_timeline_signal(struct sync_timeline *obj, unsigned int inc)
{
unsigned long flags;
struct fence *fence, *next;
@@ -99,6 +99,8 @@ void sync_timeline_signal(struct sync_timeline *obj)
spin_lock_irqsave(&obj->child_list_lock, flags);
+ obj->value += inc;
+
list_for_each_entry_safe(fence, next, &obj->active_list_head,
active_list) {
if (fence_is_signaled_locked(fence))
@@ -109,7 +111,8 @@ void sync_timeline_signal(struct sync_timeline *obj)
}
EXPORT_SYMBOL(sync_timeline_signal);
-struct fence *sync_pt_create(struct sync_timeline *obj, int size)
+struct fence *sync_pt_create(struct sync_timeline *obj, int size,
+ unsigned int value)
{
unsigned long flags;
struct fence *fence;
@@ -124,7 +127,7 @@ struct fence *sync_pt_create(struct sync_timeline *obj, int size)
spin_lock_irqsave(&obj->child_list_lock, flags);
sync_timeline_get(obj);
fence_init(fence, &android_fence_ops, &obj->child_list_lock,
- obj->context, ++obj->value);
+ obj->context, value);
list_add_tail(&fence->child_list, &obj->child_list_head);
INIT_LIST_HEAD(&fence->active_list);
spin_unlock_irqrestore(&obj->child_list_lock, flags);
@@ -164,12 +167,8 @@ static void android_fence_release(struct fence *fence)
static bool android_fence_signaled(struct fence *fence)
{
struct sync_timeline *parent = fence_parent(fence);
- int ret;
- ret = parent->ops->has_signaled(fence);
- if (ret < 0)
- fence->status = ret;
- return ret;
+ return (fence->seqno > parent->value) ? false : true;
}
static bool android_fence_enable_signaling(struct fence *fence)
diff --git a/drivers/staging/android/sync.h b/drivers/staging/android/sync.h
index fb209fc..4d3dfbf 100644
--- a/drivers/staging/android/sync.h
+++ b/drivers/staging/android/sync.h
@@ -27,10 +27,6 @@ struct sync_timeline;
/**
* struct sync_timeline_ops - sync object implementation ops
* @driver_name: name of the implementation
- * @has_signaled: returns:
- * 1 if pt has signaled
- * 0 if pt has not signaled
- * <0 on error
* @fill_driver_data: write implementation specific driver data to data.
* should return an error if there is not enough room
* as specified by size. This information is returned
@@ -41,9 +37,6 @@ struct sync_timeline;
struct sync_timeline_ops {
const char *driver_name;
- /* required */
- int (*has_signaled)(struct fence *fence);
-
/* optional */
int (*fill_driver_data)(struct fence *fence, void *data, int size);
@@ -123,23 +116,26 @@ void sync_timeline_destroy(struct sync_timeline *obj);
/**
* sync_timeline_signal() - signal a status change on a sync_timeline
* @obj: sync_timeline to signal
+ * @inc: num to increment on timeline->value
*
* A sync implementation should call this any time one of it's fences
* has signaled or has an error condition.
*/
-void sync_timeline_signal(struct sync_timeline *obj);
+void sync_timeline_signal(struct sync_timeline *obj, unsigned int inc);
/**
* sync_pt_create() - creates a sync pt
* @parent: fence's parent sync_timeline
* @size: size to allocate for this pt
+ * @inc: value of the fence
*
* Creates a new fence as a child of @parent. @size bytes will be
* allocated allowing for implementation specific data to be kept after
* the generic sync_timeline struct. Returns the fence object or
* NULL in case of error.
*/
-struct fence *sync_pt_create(struct sync_timeline *parent, int size);
+struct fence *sync_pt_create(struct sync_timeline *parent, int size,
+ unsigned int inc);
#ifdef CONFIG_DEBUG_FS
--
2.5.0
Powered by blists - more mailing lists