diff options
Diffstat (limited to 'drivers/base/sw_sync.c')
-rw-r--r-- | drivers/base/sw_sync.c | 263 |
1 files changed, 0 insertions, 263 deletions
diff --git a/drivers/base/sw_sync.c b/drivers/base/sw_sync.c deleted file mode 100644 index a93145fdcb2a..000000000000 --- a/drivers/base/sw_sync.c +++ /dev/null @@ -1,263 +0,0 @@ -/* - * drivers/base/sw_sync.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/kernel.h> -#include <linux/export.h> -#include <linux/file.h> -#include <linux/fs.h> -#include <linux/miscdevice.h> -#include <linux/module.h> -#include <linux/sw_sync.h> -#include <linux/syscalls.h> -#include <linux/uaccess.h> - -static int sw_sync_cmp(u32 a, u32 b) -{ - if (a == b) - return 0; - - return ((s32)a - (s32)b) < 0 ? -1 : 1; -} - -struct sync_pt *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)); - - pt->value = value; - - return (struct sync_pt *)pt; -} -EXPORT_SYMBOL(sw_sync_pt_create); - -static struct sync_pt *sw_sync_pt_dup(struct sync_pt *sync_pt) -{ - struct sw_sync_pt *pt = (struct sw_sync_pt *) sync_pt; - struct sw_sync_timeline *obj = - (struct sw_sync_timeline *)sync_pt->parent; - - return (struct sync_pt *) sw_sync_pt_create(obj, pt->value); -} - -static int sw_sync_pt_has_signaled(struct sync_pt *sync_pt) -{ - struct sw_sync_pt *pt = (struct sw_sync_pt *)sync_pt; - struct sw_sync_timeline *obj = - (struct sw_sync_timeline *)sync_pt->parent; - - return sw_sync_cmp(obj->value, pt->value) >= 0; -} - -static int sw_sync_pt_compare(struct sync_pt *a, struct sync_pt *b) -{ - struct sw_sync_pt *pt_a = (struct sw_sync_pt *)a; - struct sw_sync_pt *pt_b = (struct sw_sync_pt *)b; - - return sw_sync_cmp(pt_a->value, pt_b->value); -} - -static int sw_sync_fill_driver_data(struct sync_pt *sync_pt, - void *data, int size) -{ - struct sw_sync_pt *pt = (struct sw_sync_pt *)sync_pt; - - if (size < sizeof(pt->value)) - return -ENOMEM; - - memcpy(data, &pt->value, sizeof(pt->value)); - - return sizeof(pt->value); -} - -static void sw_sync_timeline_value_str(struct sync_timeline *sync_timeline, - char *str, int size) -{ - struct sw_sync_timeline *timeline = - (struct sw_sync_timeline *)sync_timeline; - snprintf(str, size, "%d", timeline->value); -} - -static void sw_sync_pt_value_str(struct sync_pt *sync_pt, - char *str, int size) -{ - struct sw_sync_pt *pt = (struct sw_sync_pt *)sync_pt; - snprintf(str, size, "%d", pt->value); -} - -struct sync_timeline_ops sw_sync_timeline_ops = { - .driver_name = "sw_sync", - .dup = sw_sync_pt_dup, - .has_signaled = sw_sync_pt_has_signaled, - .compare = sw_sync_pt_compare, - .fill_driver_data = sw_sync_fill_driver_data, - .timeline_value_str = sw_sync_timeline_value_str, - .pt_value_str = sw_sync_pt_value_str, -}; - - -struct sw_sync_timeline *sw_sync_timeline_create(const char *name) -{ - struct sw_sync_timeline *obj = (struct sw_sync_timeline *) - sync_timeline_create(&sw_sync_timeline_ops, - sizeof(struct sw_sync_timeline), - name); - - return obj; -} -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); -} -EXPORT_SYMBOL(sw_sync_timeline_inc); - -#ifdef CONFIG_SW_SYNC_USER -/* *WARNING* - * - * improper use of this can result in deadlocking kernel drivers from userspace. - */ - -/* opening sw_sync create a new sync obj */ -int sw_sync_open(struct inode *inode, struct file *file) -{ - struct sw_sync_timeline *obj; - char task_comm[TASK_COMM_LEN]; - - get_task_comm(task_comm, current); - - obj = sw_sync_timeline_create(task_comm); - if (obj == NULL) - return -ENOMEM; - - file->private_data = obj; - - return 0; -} - -int sw_sync_release(struct inode *inode, struct file *file) -{ - struct sw_sync_timeline *obj = file->private_data; - sync_timeline_destroy(&obj->obj); - return 0; -} - -long sw_sync_ioctl_create_fence(struct sw_sync_timeline *obj, unsigned long arg) -{ - int fd = get_unused_fd(); - int err; - struct sync_pt *pt; - struct sync_fence *fence; - struct sw_sync_create_fence_data data; - - if (fd < 0) - return fd; - - if (copy_from_user(&data, (void __user *)arg, sizeof(data))) { - err = -EFAULT; - goto err; - } - - pt = sw_sync_pt_create(obj, data.value); - if (pt == NULL) { - err = -ENOMEM; - goto err; - } - - data.name[sizeof(data.name) - 1] = '\0'; - fence = sync_fence_create(data.name, pt); - if (fence == NULL) { - sync_pt_free(pt); - err = -ENOMEM; - goto err; - } - - data.fence = fd; - if (copy_to_user((void __user *)arg, &data, sizeof(data))) { - sync_fence_put(fence); - err = -EFAULT; - goto err; - } - - sync_fence_install(fence, fd); - - return 0; - -err: - put_unused_fd(fd); - return err; -} - -long sw_sync_ioctl_inc(struct sw_sync_timeline *obj, unsigned long arg) -{ - u32 value; - - if (copy_from_user(&value, (void __user *)arg, sizeof(value))) - return -EFAULT; - - sw_sync_timeline_inc(obj, value); - - return 0; -} - -long sw_sync_ioctl(struct file *file, unsigned int cmd, unsigned long arg) -{ - struct sw_sync_timeline *obj = file->private_data; - - switch (cmd) { - case SW_SYNC_IOC_CREATE_FENCE: - return sw_sync_ioctl_create_fence(obj, arg); - - case SW_SYNC_IOC_INC: - return sw_sync_ioctl_inc(obj, arg); - - default: - return -ENOTTY; - } -} - -static const struct file_operations sw_sync_fops = { - .owner = THIS_MODULE, - .open = sw_sync_open, - .release = sw_sync_release, - .unlocked_ioctl = sw_sync_ioctl, - .compat_ioctl = sw_sync_ioctl, -}; - -static struct miscdevice sw_sync_dev = { - .minor = MISC_DYNAMIC_MINOR, - .name = "sw_sync", - .fops = &sw_sync_fops, -}; - -int __init sw_sync_device_init(void) -{ - return misc_register(&sw_sync_dev); -} - -void __exit sw_sync_device_remove(void) -{ - misc_deregister(&sw_sync_dev); -} - -module_init(sw_sync_device_init); -module_exit(sw_sync_device_remove); - -#endif /* CONFIG_SW_SYNC_USER */ |