obj-$(CONFIG_ASHMEM) += ashmem.o
obj-$(CONFIG_ANDROID_LOW_MEMORY_KILLER) += lowmemorykiller.o
-obj-$(CONFIG_SYNC) += sync.o sync_debug.o
+obj-$(CONFIG_SYNC) += sync_file.o sync.o sync_debug.o
obj-$(CONFIG_SW_SYNC) += sw_sync.o
#include <linux/debugfs.h>
#include <linux/export.h>
-#include <linux/file.h>
-#include <linux/fs.h>
#include <linux/kernel.h>
-#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include "trace/sync.h"
static const struct fence_ops android_fence_ops;
-static const struct file_operations sync_file_fops;
struct sync_timeline *sync_timeline_create(const struct sync_timeline_ops *ops,
int size, const char *name)
}
EXPORT_SYMBOL(sync_pt_create);
-static struct sync_file *sync_file_alloc(int size)
-{
- struct sync_file *sync_file;
-
- sync_file = kzalloc(size, GFP_KERNEL);
- if (!sync_file)
- return NULL;
-
- sync_file->file = anon_inode_getfile("sync_file", &sync_file_fops,
- sync_file, 0);
- if (IS_ERR(sync_file->file))
- goto err;
-
- kref_init(&sync_file->kref);
-
- init_waitqueue_head(&sync_file->wq);
-
- return sync_file;
-
-err:
- kfree(sync_file);
- return NULL;
-}
-
-static void fence_check_cb_func(struct fence *f, struct fence_cb *cb)
-{
- struct sync_file_cb *check;
- struct sync_file *sync_file;
-
- check = container_of(cb, struct sync_file_cb, cb);
- sync_file = check->sync_file;
-
- if (atomic_dec_and_test(&sync_file->status))
- wake_up_all(&sync_file->wq);
-}
-
-/**
- * sync_fence_create() - creates a sync fence
- * @fence: fence to add to the sync_fence
- *
- * Creates a sync_file containg @fence. Once this is called, the sync_file
- * takes ownership of @fence.
- */
-struct sync_file *sync_file_create(struct fence *fence)
-{
- struct sync_file *sync_file;
-
- sync_file = sync_file_alloc(offsetof(struct sync_file, cbs[1]));
- if (!sync_file)
- return NULL;
-
- sync_file->num_fences = 1;
- atomic_set(&sync_file->status, 1);
- snprintf(sync_file->name, sizeof(sync_file->name), "%s-%s%d-%d",
- fence->ops->get_driver_name(fence),
- fence->ops->get_timeline_name(fence), fence->context,
- fence->seqno);
-
- sync_file->cbs[0].fence = fence;
- sync_file->cbs[0].sync_file = sync_file;
- if (fence_add_callback(fence, &sync_file->cbs[0].cb,
- fence_check_cb_func))
- atomic_dec(&sync_file->status);
-
- sync_file_debug_add(sync_file);
-
- return sync_file;
-}
-EXPORT_SYMBOL(sync_file_create);
-
-/**
- * sync_file_fdget() - get a sync_file from an fd
- * @fd: fd referencing a fence
- *
- * Ensures @fd references a valid sync_file, increments the refcount of the
- * backing file. Returns the sync_file or NULL in case of error.
- */
-static struct sync_file *sync_file_fdget(int fd)
-{
- struct file *file = fget(fd);
-
- if (!file)
- return NULL;
-
- if (file->f_op != &sync_file_fops)
- goto err;
-
- return file->private_data;
-
-err:
- fput(file);
- return NULL;
-}
-
-static void sync_file_add_pt(struct sync_file *sync_file, int *i,
- struct fence *fence)
-{
- sync_file->cbs[*i].fence = fence;
- sync_file->cbs[*i].sync_file = sync_file;
-
- if (!fence_add_callback(fence, &sync_file->cbs[*i].cb,
- fence_check_cb_func)) {
- fence_get(fence);
- (*i)++;
- }
-}
-
-/**
- * sync_file_merge() - merge two sync_files
- * @name: name of new fence
- * @a: sync_file a
- * @b: sync_file b
- *
- * Creates a new sync_file which contains copies of all the fences in both
- * @a and @b. @a and @b remain valid, independent sync_file. Returns the
- * new merged sync_file or NULL in case of error.
- */
-static struct sync_file *sync_file_merge(const char *name, struct sync_file *a,
- struct sync_file *b)
-{
- int num_fences = a->num_fences + b->num_fences;
- struct sync_file *sync_file;
- int i, i_a, i_b;
- unsigned long size = offsetof(struct sync_file, cbs[num_fences]);
-
- sync_file = sync_file_alloc(size);
- if (!sync_file)
- return NULL;
-
- atomic_set(&sync_file->status, num_fences);
-
- /*
- * Assume sync_file a and b are both ordered and have no
- * duplicates with the same context.
- *
- * If a sync_file can only be created with sync_file_merge
- * and sync_file_create, this is a reasonable assumption.
- */
- for (i = i_a = i_b = 0; i_a < a->num_fences && i_b < b->num_fences; ) {
- struct fence *pt_a = a->cbs[i_a].fence;
- struct fence *pt_b = b->cbs[i_b].fence;
-
- if (pt_a->context < pt_b->context) {
- sync_file_add_pt(sync_file, &i, pt_a);
-
- i_a++;
- } else if (pt_a->context > pt_b->context) {
- sync_file_add_pt(sync_file, &i, pt_b);
-
- i_b++;
- } else {
- if (pt_a->seqno - pt_b->seqno <= INT_MAX)
- sync_file_add_pt(sync_file, &i, pt_a);
- else
- sync_file_add_pt(sync_file, &i, pt_b);
-
- i_a++;
- i_b++;
- }
- }
-
- for (; i_a < a->num_fences; i_a++)
- sync_file_add_pt(sync_file, &i, a->cbs[i_a].fence);
-
- for (; i_b < b->num_fences; i_b++)
- sync_file_add_pt(sync_file, &i, b->cbs[i_b].fence);
-
- if (num_fences > i)
- atomic_sub(num_fences - i, &sync_file->status);
- sync_file->num_fences = i;
-
- strlcpy(sync_file->name, name, sizeof(sync_file->name));
- sync_file_debug_add(sync_file);
- return sync_file;
-}
-
static const char *android_fence_get_driver_name(struct fence *fence)
{
struct sync_timeline *parent = fence_parent(fence);
.fence_value_str = android_fence_value_str,
.timeline_value_str = android_fence_timeline_value_str,
};
-
-static void sync_file_free(struct kref *kref)
-{
- struct sync_file *sync_file = container_of(kref, struct sync_file,
- kref);
- int i;
-
- for (i = 0; i < sync_file->num_fences; ++i) {
- fence_remove_callback(sync_file->cbs[i].fence,
- &sync_file->cbs[i].cb);
- fence_put(sync_file->cbs[i].fence);
- }
-
- kfree(sync_file);
-}
-
-static int sync_file_release(struct inode *inode, struct file *file)
-{
- struct sync_file *sync_file = file->private_data;
-
- sync_file_debug_remove(sync_file);
-
- kref_put(&sync_file->kref, sync_file_free);
- return 0;
-}
-
-static unsigned int sync_file_poll(struct file *file, poll_table *wait)
-{
- struct sync_file *sync_file = file->private_data;
- int status;
-
- poll_wait(file, &sync_file->wq, wait);
-
- status = atomic_read(&sync_file->status);
-
- if (!status)
- return POLLIN;
- if (status < 0)
- return POLLERR;
- return 0;
-}
-
-static long sync_file_ioctl_merge(struct sync_file *sync_file,
- unsigned long arg)
-{
- int fd = get_unused_fd_flags(O_CLOEXEC);
- int err;
- struct sync_file *fence2, *fence3;
- struct sync_merge_data data;
-
- if (fd < 0)
- return fd;
-
- if (copy_from_user(&data, (void __user *)arg, sizeof(data))) {
- err = -EFAULT;
- goto err_put_fd;
- }
-
- if (data.flags || data.pad) {
- err = -EINVAL;
- goto err_put_fd;
- }
-
- fence2 = sync_file_fdget(data.fd2);
- if (!fence2) {
- err = -ENOENT;
- goto err_put_fd;
- }
-
- data.name[sizeof(data.name) - 1] = '\0';
- fence3 = sync_file_merge(data.name, sync_file, fence2);
- if (!fence3) {
- err = -ENOMEM;
- goto err_put_fence2;
- }
-
- data.fence = fd;
- if (copy_to_user((void __user *)arg, &data, sizeof(data))) {
- err = -EFAULT;
- goto err_put_fence3;
- }
-
- fd_install(fd, fence3->file);
- fput(fence2->file);
- return 0;
-
-err_put_fence3:
- fput(fence3->file);
-
-err_put_fence2:
- fput(fence2->file);
-
-err_put_fd:
- put_unused_fd(fd);
- return err;
-}
-
-static void sync_fill_fence_info(struct fence *fence,
- struct sync_fence_info *info)
-{
- strlcpy(info->obj_name, fence->ops->get_timeline_name(fence),
- sizeof(info->obj_name));
- strlcpy(info->driver_name, fence->ops->get_driver_name(fence),
- sizeof(info->driver_name));
- if (fence_is_signaled(fence))
- info->status = fence->status >= 0 ? 1 : fence->status;
- else
- info->status = 0;
- info->timestamp_ns = ktime_to_ns(fence->timestamp);
-}
-
-static long sync_file_ioctl_fence_info(struct sync_file *sync_file,
- unsigned long arg)
-{
- struct sync_file_info info;
- struct sync_fence_info *fence_info = NULL;
- __u32 size;
- int ret, i;
-
- if (copy_from_user(&info, (void __user *)arg, sizeof(info)))
- return -EFAULT;
-
- if (info.flags || info.pad)
- return -EINVAL;
-
- /*
- * Passing num_fences = 0 means that userspace doesn't want to
- * retrieve any sync_fence_info. If num_fences = 0 we skip filling
- * sync_fence_info and return the actual number of fences on
- * info->num_fences.
- */
- if (!info.num_fences)
- goto no_fences;
-
- if (info.num_fences < sync_file->num_fences)
- return -EINVAL;
-
- size = sync_file->num_fences * sizeof(*fence_info);
- fence_info = kzalloc(size, GFP_KERNEL);
- if (!fence_info)
- return -ENOMEM;
-
- for (i = 0; i < sync_file->num_fences; ++i)
- sync_fill_fence_info(sync_file->cbs[i].fence, &fence_info[i]);
-
- if (copy_to_user(u64_to_user_ptr(info.sync_fence_info), fence_info,
- size)) {
- ret = -EFAULT;
- goto out;
- }
-
-no_fences:
- strlcpy(info.name, sync_file->name, sizeof(info.name));
- info.status = atomic_read(&sync_file->status);
- if (info.status >= 0)
- info.status = !info.status;
-
- info.num_fences = sync_file->num_fences;
-
- if (copy_to_user((void __user *)arg, &info, sizeof(info)))
- ret = -EFAULT;
- else
- ret = 0;
-
-out:
- kfree(fence_info);
-
- return ret;
-}
-
-static long sync_file_ioctl(struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- struct sync_file *sync_file = file->private_data;
-
- switch (cmd) {
- case SYNC_IOC_MERGE:
- return sync_file_ioctl_merge(sync_file, arg);
-
- case SYNC_IOC_FILE_INFO:
- return sync_file_ioctl_fence_info(sync_file, arg);
-
- default:
- return -ENOTTY;
- }
-}
-
-static const struct file_operations sync_file_fops = {
- .release = sync_file_release,
- .poll = sync_file_poll,
- .unlocked_ioctl = sync_file_ioctl,
- .compat_ioctl = sync_file_ioctl,
-};
-
#include <linux/spinlock.h>
#include <linux/fence.h>
-#include "uapi/sync.h"
+#include "sync_file.h"
+#include "uapi/sync_file.h"
struct sync_timeline;
-struct sync_file;
/**
* struct sync_timeline_ops - sync object implementation ops
child_list_lock);
}
-struct sync_file_cb {
- struct fence_cb cb;
- struct fence *fence;
- struct sync_file *sync_file;
-};
-
-/**
- * struct sync_file - sync file to export to the userspace
- * @file: file representing this fence
- * @kref: reference count on fence.
- * @name: name of sync_file. Useful for debugging
- * @sync_file_list: membership in global file list
- * @num_fences number of sync_pts in the fence
- * @wq: wait queue for fence signaling
- * @status: 0: signaled, >0:active, <0: error
- * @cbs: sync_pts callback information
- */
-struct sync_file {
- struct file *file;
- struct kref kref;
- char name[32];
-#ifdef CONFIG_DEBUG_FS
- struct list_head sync_file_list;
-#endif
- int num_fences;
-
- wait_queue_head_t wq;
- atomic_t status;
-
- struct sync_file_cb cbs[];
-};
-
/*
* API for sync_timeline implementers
*/
*/
struct fence *sync_pt_create(struct sync_timeline *parent, int size);
-struct sync_file *sync_file_create(struct fence *fence);
-
#ifdef CONFIG_DEBUG_FS
void sync_timeline_debug_add(struct sync_timeline *obj);
#include <linux/uaccess.h>
#include <linux/anon_inodes.h>
#include <linux/time64.h>
+#include "sync_file.h"
#include "sw_sync.h"
#ifdef CONFIG_DEBUG_FS
--- /dev/null
+/*
+ * drivers/dma-buf/sync_file.c
+ *
+ * Copyright (C) 2012 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/export.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/poll.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <linux/anon_inodes.h>
+#include "sync_file.h"
+#include "uapi/sync_file.h"
+
+static const struct file_operations sync_file_fops;
+
+static struct sync_file *sync_file_alloc(int size)
+{
+ struct sync_file *sync_file;
+
+ sync_file = kzalloc(size, GFP_KERNEL);
+ if (!sync_file)
+ return NULL;
+
+ sync_file->file = anon_inode_getfile("sync_file", &sync_file_fops,
+ sync_file, 0);
+ if (IS_ERR(sync_file->file))
+ goto err;
+
+ kref_init(&sync_file->kref);
+
+ init_waitqueue_head(&sync_file->wq);
+
+ return sync_file;
+
+err:
+ kfree(sync_file);
+ return NULL;
+}
+
+static void fence_check_cb_func(struct fence *f, struct fence_cb *cb)
+{
+ struct sync_file_cb *check;
+ struct sync_file *sync_file;
+
+ check = container_of(cb, struct sync_file_cb, cb);
+ sync_file = check->sync_file;
+
+ if (atomic_dec_and_test(&sync_file->status))
+ wake_up_all(&sync_file->wq);
+}
+
+/**
+ * sync_fence_create() - creates a sync fence
+ * @fence: fence to add to the sync_fence
+ *
+ * Creates a sync_file containg @fence. Once this is called, the sync_file
+ * takes ownership of @fence.
+ */
+struct sync_file *sync_file_create(struct fence *fence)
+{
+ struct sync_file *sync_file;
+
+ sync_file = sync_file_alloc(offsetof(struct sync_file, cbs[1]));
+ if (!sync_file)
+ return NULL;
+
+ sync_file->num_fences = 1;
+ atomic_set(&sync_file->status, 1);
+ snprintf(sync_file->name, sizeof(sync_file->name), "%s-%s%d-%d",
+ fence->ops->get_driver_name(fence),
+ fence->ops->get_timeline_name(fence), fence->context,
+ fence->seqno);
+
+ sync_file->cbs[0].fence = fence;
+ sync_file->cbs[0].sync_file = sync_file;
+ if (fence_add_callback(fence, &sync_file->cbs[0].cb,
+ fence_check_cb_func))
+ atomic_dec(&sync_file->status);
+
+ return sync_file;
+}
+EXPORT_SYMBOL(sync_file_create);
+
+/**
+ * sync_file_fdget() - get a sync_file from an fd
+ * @fd: fd referencing a fence
+ *
+ * Ensures @fd references a valid sync_file, increments the refcount of the
+ * backing file. Returns the sync_file or NULL in case of error.
+ */
+static struct sync_file *sync_file_fdget(int fd)
+{
+ struct file *file = fget(fd);
+
+ if (!file)
+ return NULL;
+
+ if (file->f_op != &sync_file_fops)
+ goto err;
+
+ return file->private_data;
+
+err:
+ fput(file);
+ return NULL;
+}
+
+static void sync_file_add_pt(struct sync_file *sync_file, int *i,
+ struct fence *fence)
+{
+ sync_file->cbs[*i].fence = fence;
+ sync_file->cbs[*i].sync_file = sync_file;
+
+ if (!fence_add_callback(fence, &sync_file->cbs[*i].cb,
+ fence_check_cb_func)) {
+ fence_get(fence);
+ (*i)++;
+ }
+}
+
+/**
+ * sync_file_merge() - merge two sync_files
+ * @name: name of new fence
+ * @a: sync_file a
+ * @b: sync_file b
+ *
+ * Creates a new sync_file which contains copies of all the fences in both
+ * @a and @b. @a and @b remain valid, independent sync_file. Returns the
+ * new merged sync_file or NULL in case of error.
+ */
+static struct sync_file *sync_file_merge(const char *name, struct sync_file *a,
+ struct sync_file *b)
+{
+ int num_fences = a->num_fences + b->num_fences;
+ struct sync_file *sync_file;
+ int i, i_a, i_b;
+ unsigned long size = offsetof(struct sync_file, cbs[num_fences]);
+
+ sync_file = sync_file_alloc(size);
+ if (!sync_file)
+ return NULL;
+
+ atomic_set(&sync_file->status, num_fences);
+
+ /*
+ * Assume sync_file a and b are both ordered and have no
+ * duplicates with the same context.
+ *
+ * If a sync_file can only be created with sync_file_merge
+ * and sync_file_create, this is a reasonable assumption.
+ */
+ for (i = i_a = i_b = 0; i_a < a->num_fences && i_b < b->num_fences; ) {
+ struct fence *pt_a = a->cbs[i_a].fence;
+ struct fence *pt_b = b->cbs[i_b].fence;
+
+ if (pt_a->context < pt_b->context) {
+ sync_file_add_pt(sync_file, &i, pt_a);
+
+ i_a++;
+ } else if (pt_a->context > pt_b->context) {
+ sync_file_add_pt(sync_file, &i, pt_b);
+
+ i_b++;
+ } else {
+ if (pt_a->seqno - pt_b->seqno <= INT_MAX)
+ sync_file_add_pt(sync_file, &i, pt_a);
+ else
+ sync_file_add_pt(sync_file, &i, pt_b);
+
+ i_a++;
+ i_b++;
+ }
+ }
+
+ for (; i_a < a->num_fences; i_a++)
+ sync_file_add_pt(sync_file, &i, a->cbs[i_a].fence);
+
+ for (; i_b < b->num_fences; i_b++)
+ sync_file_add_pt(sync_file, &i, b->cbs[i_b].fence);
+
+ if (num_fences > i)
+ atomic_sub(num_fences - i, &sync_file->status);
+ sync_file->num_fences = i;
+
+ strlcpy(sync_file->name, name, sizeof(sync_file->name));
+ return sync_file;
+}
+
+static void sync_file_free(struct kref *kref)
+{
+ struct sync_file *sync_file = container_of(kref, struct sync_file,
+ kref);
+ int i;
+
+ for (i = 0; i < sync_file->num_fences; ++i) {
+ fence_remove_callback(sync_file->cbs[i].fence,
+ &sync_file->cbs[i].cb);
+ fence_put(sync_file->cbs[i].fence);
+ }
+
+ kfree(sync_file);
+}
+
+static int sync_file_release(struct inode *inode, struct file *file)
+{
+ struct sync_file *sync_file = file->private_data;
+
+ kref_put(&sync_file->kref, sync_file_free);
+ return 0;
+}
+
+static unsigned int sync_file_poll(struct file *file, poll_table *wait)
+{
+ struct sync_file *sync_file = file->private_data;
+ int status;
+
+ poll_wait(file, &sync_file->wq, wait);
+
+ status = atomic_read(&sync_file->status);
+
+ if (!status)
+ return POLLIN;
+ if (status < 0)
+ return POLLERR;
+ return 0;
+}
+
+static long sync_file_ioctl_merge(struct sync_file *sync_file,
+ unsigned long arg)
+{
+ int fd = get_unused_fd_flags(O_CLOEXEC);
+ int err;
+ struct sync_file *fence2, *fence3;
+ struct sync_merge_data data;
+
+ if (fd < 0)
+ return fd;
+
+ if (copy_from_user(&data, (void __user *)arg, sizeof(data))) {
+ err = -EFAULT;
+ goto err_put_fd;
+ }
+
+ if (data.flags || data.pad) {
+ err = -EINVAL;
+ goto err_put_fd;
+ }
+
+ fence2 = sync_file_fdget(data.fd2);
+ if (!fence2) {
+ err = -ENOENT;
+ goto err_put_fd;
+ }
+
+ data.name[sizeof(data.name) - 1] = '\0';
+ fence3 = sync_file_merge(data.name, sync_file, fence2);
+ if (!fence3) {
+ err = -ENOMEM;
+ goto err_put_fence2;
+ }
+
+ data.fence = fd;
+ if (copy_to_user((void __user *)arg, &data, sizeof(data))) {
+ err = -EFAULT;
+ goto err_put_fence3;
+ }
+
+ fd_install(fd, fence3->file);
+ fput(fence2->file);
+ return 0;
+
+err_put_fence3:
+ fput(fence3->file);
+
+err_put_fence2:
+ fput(fence2->file);
+
+err_put_fd:
+ put_unused_fd(fd);
+ return err;
+}
+
+static void sync_fill_fence_info(struct fence *fence,
+ struct sync_fence_info *info)
+{
+ strlcpy(info->obj_name, fence->ops->get_timeline_name(fence),
+ sizeof(info->obj_name));
+ strlcpy(info->driver_name, fence->ops->get_driver_name(fence),
+ sizeof(info->driver_name));
+ if (fence_is_signaled(fence))
+ info->status = fence->status >= 0 ? 1 : fence->status;
+ else
+ info->status = 0;
+ info->timestamp_ns = ktime_to_ns(fence->timestamp);
+}
+
+static long sync_file_ioctl_fence_info(struct sync_file *sync_file,
+ unsigned long arg)
+{
+ struct sync_file_info info;
+ struct sync_fence_info *fence_info = NULL;
+ __u32 size;
+ int ret, i;
+
+ if (copy_from_user(&info, (void __user *)arg, sizeof(info)))
+ return -EFAULT;
+
+ if (info.flags || info.pad)
+ return -EINVAL;
+
+ /*
+ * Passing num_fences = 0 means that userspace doesn't want to
+ * retrieve any sync_fence_info. If num_fences = 0 we skip filling
+ * sync_fence_info and return the actual number of fences on
+ * info->num_fences.
+ */
+ if (!info.num_fences)
+ goto no_fences;
+
+ if (info.num_fences < sync_file->num_fences)
+ return -EINVAL;
+
+ size = sync_file->num_fences * sizeof(*fence_info);
+ fence_info = kzalloc(size, GFP_KERNEL);
+ if (!fence_info)
+ return -ENOMEM;
+
+ for (i = 0; i < sync_file->num_fences; ++i)
+ sync_fill_fence_info(sync_file->cbs[i].fence, &fence_info[i]);
+
+ if (copy_to_user(u64_to_user_ptr(info.sync_fence_info), fence_info,
+ size)) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+no_fences:
+ strlcpy(info.name, sync_file->name, sizeof(info.name));
+ info.status = atomic_read(&sync_file->status);
+ if (info.status >= 0)
+ info.status = !info.status;
+
+ info.num_fences = sync_file->num_fences;
+
+ if (copy_to_user((void __user *)arg, &info, sizeof(info)))
+ ret = -EFAULT;
+ else
+ ret = 0;
+
+out:
+ kfree(fence_info);
+
+ return ret;
+}
+
+static long sync_file_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ struct sync_file *sync_file = file->private_data;
+
+ switch (cmd) {
+ case SYNC_IOC_MERGE:
+ return sync_file_ioctl_merge(sync_file, arg);
+
+ case SYNC_IOC_FILE_INFO:
+ return sync_file_ioctl_fence_info(sync_file, arg);
+
+ default:
+ return -ENOTTY;
+ }
+}
+
+static const struct file_operations sync_file_fops = {
+ .release = sync_file_release,
+ .poll = sync_file_poll,
+ .unlocked_ioctl = sync_file_ioctl,
+ .compat_ioctl = sync_file_ioctl,
+};
+
--- /dev/null
+/*
+ * include/linux/sync_file.h
+ *
+ * Copyright (C) 2012 Google, Inc.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef _LINUX_SYNC_FILE_H
+#define _LINUX_SYNC_FILE_H
+
+#include <linux/types.h>
+#include <linux/kref.h>
+#include <linux/ktime.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/fence.h>
+
+struct sync_file_cb {
+ struct fence_cb cb;
+ struct fence *fence;
+ struct sync_file *sync_file;
+};
+
+/**
+ * struct sync_file - sync file to export to the userspace
+ * @file: file representing this fence
+ * @kref: reference count on fence.
+ * @name: name of sync_file. Useful for debugging
+ * @sync_file_list: membership in global file list
+ * @num_fences number of sync_pts in the fence
+ * @wq: wait queue for fence signaling
+ * @status: 0: signaled, >0:active, <0: error
+ * @cbs: sync_pts callback information
+ */
+struct sync_file {
+ struct file *file;
+ struct kref kref;
+ char name[32];
+#ifdef CONFIG_DEBUG_FS
+ struct list_head sync_file_list;
+#endif
+ int num_fences;
+
+ wait_queue_head_t wq;
+ atomic_t status;
+
+ struct sync_file_cb cbs[];
+};
+
+struct sync_file *sync_file_create(struct fence *fence);
+
+#endif /* _LINUX_SYNC_H */
+++ /dev/null
-/*
- * Copyright (C) 2012 Google, Inc.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef _UAPI_LINUX_SYNC_H
-#define _UAPI_LINUX_SYNC_H
-
-#include <linux/ioctl.h>
-#include <linux/types.h>
-
-/**
- * struct sync_merge_data - data passed to merge ioctl
- * @name: name of new fence
- * @fd2: file descriptor of second fence
- * @fence: returns the fd of the new fence to userspace
- * @flags: merge_data flags
- * @pad: padding for 64-bit alignment, should always be zero
- */
-struct sync_merge_data {
- char name[32];
- __s32 fd2;
- __s32 fence;
- __u32 flags;
- __u32 pad;
-};
-
-/**
- * struct sync_fence_info - detailed fence information
- * @obj_name: name of parent sync_timeline
-* @driver_name: name of driver implementing the parent
-* @status: status of the fence 0:active 1:signaled <0:error
- * @flags: fence_info flags
- * @timestamp_ns: timestamp of status change in nanoseconds
- */
-struct sync_fence_info {
- char obj_name[32];
- char driver_name[32];
- __s32 status;
- __u32 flags;
- __u64 timestamp_ns;
-};
-
-/**
- * struct sync_file_info - data returned from fence info ioctl
- * @name: name of fence
- * @status: status of fence. 1: signaled 0:active <0:error
- * @flags: sync_file_info flags
- * @num_fences number of fences in the sync_file
- * @pad: padding for 64-bit alignment, should always be zero
- * @sync_fence_info: pointer to array of structs sync_fence_info with all
- * fences in the sync_file
- */
-struct sync_file_info {
- char name[32];
- __s32 status;
- __u32 flags;
- __u32 num_fences;
- __u32 pad;
-
- __u64 sync_fence_info;
-};
-
-#define SYNC_IOC_MAGIC '>'
-
-/**
- * Opcodes 0, 1 and 2 were burned during a API change to avoid users of the
- * old API to get weird errors when trying to handling sync_files. The API
- * change happened during the de-stage of the Sync Framework when there was
- * no upstream users available.
- */
-
-/**
- * DOC: SYNC_IOC_MERGE - merge two fences
- *
- * Takes a struct sync_merge_data. Creates a new fence containing copies of
- * the sync_pts in both the calling fd and sync_merge_data.fd2. Returns the
- * new fence's fd in sync_merge_data.fence
- */
-#define SYNC_IOC_MERGE _IOWR(SYNC_IOC_MAGIC, 3, struct sync_merge_data)
-
-/**
- * DOC: SYNC_IOC_FENCE_INFO - get detailed information on a fence
- *
- * Takes a struct sync_file_info_data with extra space allocated for pt_info.
- * Caller should write the size of the buffer into len. On return, len is
- * updated to reflect the total size of the sync_file_info_data including
- * pt_info.
- *
- * pt_info is a buffer containing sync_pt_infos for every sync_pt in the fence.
- * To iterate over the sync_pt_infos, use the sync_pt_info.len field.
- */
-#define SYNC_IOC_FILE_INFO _IOWR(SYNC_IOC_MAGIC, 4, struct sync_file_info)
-
-#endif /* _UAPI_LINUX_SYNC_H */
--- /dev/null
+/*
+ * Copyright (C) 2012 Google, Inc.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef _UAPI_LINUX_SYNC_H
+#define _UAPI_LINUX_SYNC_H
+
+#include <linux/ioctl.h>
+#include <linux/types.h>
+
+/**
+ * struct sync_merge_data - data passed to merge ioctl
+ * @name: name of new fence
+ * @fd2: file descriptor of second fence
+ * @fence: returns the fd of the new fence to userspace
+ * @flags: merge_data flags
+ * @pad: padding for 64-bit alignment, should always be zero
+ */
+struct sync_merge_data {
+ char name[32];
+ __s32 fd2;
+ __s32 fence;
+ __u32 flags;
+ __u32 pad;
+};
+
+/**
+ * struct sync_fence_info - detailed fence information
+ * @obj_name: name of parent sync_timeline
+* @driver_name: name of driver implementing the parent
+* @status: status of the fence 0:active 1:signaled <0:error
+ * @flags: fence_info flags
+ * @timestamp_ns: timestamp of status change in nanoseconds
+ */
+struct sync_fence_info {
+ char obj_name[32];
+ char driver_name[32];
+ __s32 status;
+ __u32 flags;
+ __u64 timestamp_ns;
+};
+
+/**
+ * struct sync_file_info - data returned from fence info ioctl
+ * @name: name of fence
+ * @status: status of fence. 1: signaled 0:active <0:error
+ * @flags: sync_file_info flags
+ * @num_fences number of fences in the sync_file
+ * @pad: padding for 64-bit alignment, should always be zero
+ * @sync_fence_info: pointer to array of structs sync_fence_info with all
+ * fences in the sync_file
+ */
+struct sync_file_info {
+ char name[32];
+ __s32 status;
+ __u32 flags;
+ __u32 num_fences;
+ __u32 pad;
+
+ __u64 sync_fence_info;
+};
+
+#define SYNC_IOC_MAGIC '>'
+
+/**
+ * Opcodes 0, 1 and 2 were burned during a API change to avoid users of the
+ * old API to get weird errors when trying to handling sync_files. The API
+ * change happened during the de-stage of the Sync Framework when there was
+ * no upstream users available.
+ */
+
+/**
+ * DOC: SYNC_IOC_MERGE - merge two fences
+ *
+ * Takes a struct sync_merge_data. Creates a new fence containing copies of
+ * the sync_pts in both the calling fd and sync_merge_data.fd2. Returns the
+ * new fence's fd in sync_merge_data.fence
+ */
+#define SYNC_IOC_MERGE _IOWR(SYNC_IOC_MAGIC, 3, struct sync_merge_data)
+
+/**
+ * DOC: SYNC_IOC_FENCE_INFO - get detailed information on a fence
+ *
+ * Takes a struct sync_file_info_data with extra space allocated for pt_info.
+ * Caller should write the size of the buffer into len. On return, len is
+ * updated to reflect the total size of the sync_file_info_data including
+ * pt_info.
+ *
+ * pt_info is a buffer containing sync_pt_infos for every sync_pt in the fence.
+ * To iterate over the sync_pt_infos, use the sync_pt_info.len field.
+ */
+#define SYNC_IOC_FILE_INFO _IOWR(SYNC_IOC_MAGIC, 4, struct sync_file_info)
+
+#endif /* _UAPI_LINUX_SYNC_H */
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff