1 // SPDX-License-Identifier: GPL-2.0+
10 #include <linux/posix-clock.h>
15 #include "posix-timers.h"
22 	struct posix_clock_context *pccontext = fp->private_data;  in get_posix_clock()
23 	struct posix_clock *clk = pccontext->clk;  in get_posix_clock()  local
25 	down_read(&clk->rwsem);  in get_posix_clock()
27 	if (!clk->zombie)  in get_posix_clock()
28 		return clk;  in get_posix_clock()
30 	up_read(&clk->rwsem);  in get_posix_clock()
35 static void put_posix_clock(struct posix_clock *clk)  in put_posix_clock()  argument
37 	up_read(&clk->rwsem);  in put_posix_clock()
43 	struct posix_clock_context *pccontext = fp->private_data;  in posix_clock_read()
44 	struct posix_clock *clk = get_posix_clock(fp);  in posix_clock_read()  local
45 	int err = -EINVAL;  in posix_clock_read()
47 	if (!clk)  in posix_clock_read()
48 		return -ENODEV;  in posix_clock_read()
50 	if (clk->ops.read)  in posix_clock_read()
51 		err = clk->ops.read(pccontext, fp->f_flags, buf, count);  in posix_clock_read()
53 	put_posix_clock(clk);  in posix_clock_read()
60 	struct posix_clock_context *pccontext = fp->private_data;  in posix_clock_poll()
61 	struct posix_clock *clk = get_posix_clock(fp);  in posix_clock_poll()  local
64 	if (!clk)  in posix_clock_poll()
67 	if (clk->ops.poll)  in posix_clock_poll()
68 		result = clk->ops.poll(pccontext, fp, wait);  in posix_clock_poll()
70 	put_posix_clock(clk);  in posix_clock_poll()
78 	struct posix_clock_context *pccontext = fp->private_data;  in posix_clock_ioctl()
79 	struct posix_clock *clk = get_posix_clock(fp);  in posix_clock_ioctl()  local
80 	int err = -ENOTTY;  in posix_clock_ioctl()
82 	if (!clk)  in posix_clock_ioctl()
83 		return -ENODEV;  in posix_clock_ioctl()
85 	if (clk->ops.ioctl)  in posix_clock_ioctl()
86 		err = clk->ops.ioctl(pccontext, cmd, arg);  in posix_clock_ioctl()
88 	put_posix_clock(clk);  in posix_clock_ioctl()
96 	struct posix_clock *clk =  in posix_clock_open()  local
97 		container_of(inode->i_cdev, struct posix_clock, cdev);  in posix_clock_open()
100 	down_read(&clk->rwsem);  in posix_clock_open()
102 	if (clk->zombie) {  in posix_clock_open()
103 		err = -ENODEV;  in posix_clock_open()
108 		err = -ENOMEM;  in posix_clock_open()
111 	pccontext->clk = clk;  in posix_clock_open()
112 	pccontext->fp = fp;  in posix_clock_open()
113 	if (clk->ops.open) {  in posix_clock_open()
114 		err = clk->ops.open(pccontext, fp->f_mode);  in posix_clock_open()
121 	fp->private_data = pccontext;  in posix_clock_open()
122 	get_device(clk->dev);  in posix_clock_open()
125 	up_read(&clk->rwsem);  in posix_clock_open()
131 	struct posix_clock_context *pccontext = fp->private_data;  in posix_clock_release()
132 	struct posix_clock *clk;  in posix_clock_release()  local
136 		return -ENODEV;  in posix_clock_release()
137 	clk = pccontext->clk;  in posix_clock_release()
139 	if (clk->ops.release)  in posix_clock_release()
140 		err = clk->ops.release(pccontext);  in posix_clock_release()
142 	put_device(clk->dev);  in posix_clock_release()
145 	fp->private_data = NULL;  in posix_clock_release()
160 int posix_clock_register(struct posix_clock *clk, struct device *dev)  in posix_clock_register()  argument
164 	init_rwsem(&clk->rwsem);  in posix_clock_register()
166 	cdev_init(&clk->cdev, &posix_clock_file_operations);  in posix_clock_register()
167 	err = cdev_device_add(&clk->cdev, dev);  in posix_clock_register()
170 			dev_name(dev), MAJOR(dev->devt), MINOR(dev->devt));  in posix_clock_register()
173 	clk->cdev.owner = clk->ops.owner;  in posix_clock_register()
174 	clk->dev = dev;  in posix_clock_register()
180 void posix_clock_unregister(struct posix_clock *clk)  in posix_clock_unregister()  argument
182 	cdev_device_del(&clk->cdev, clk->dev);  in posix_clock_unregister()
184 	down_write(&clk->rwsem);  in posix_clock_unregister()
185 	clk->zombie = true;  in posix_clock_unregister()
186 	up_write(&clk->rwsem);  in posix_clock_unregister()
188 	put_device(clk->dev);  in posix_clock_unregister()
194 	struct posix_clock *clk;  member
200 	int err = -EINVAL;  in get_clock_desc()
205 	if (fp->f_op->open != posix_clock_open || !fp->private_data)  in get_clock_desc()
208 	cd->fp = fp;  in get_clock_desc()
209 	cd->clk = get_posix_clock(fp);  in get_clock_desc()
211 	err = cd->clk ? 0 : -ENODEV;  in get_clock_desc()
220 	put_posix_clock(cd->clk);  in put_clock_desc()
221 	fput(cd->fp);  in put_clock_desc()
233 	if (tx->modes && (cd.fp->f_mode & FMODE_WRITE) == 0) {  in pc_clock_adjtime()
234 		err = -EACCES;  in pc_clock_adjtime()
238 	if (cd.clk->ops.clock_adjtime)  in pc_clock_adjtime()
239 		err = cd.clk->ops.clock_adjtime(cd.clk, tx);  in pc_clock_adjtime()
241 		err = -EOPNOTSUPP;  in pc_clock_adjtime()
257 	if (cd.clk->ops.clock_gettime)  in pc_clock_gettime()
258 		err = cd.clk->ops.clock_gettime(cd.clk, ts);  in pc_clock_gettime()
260 		err = -EOPNOTSUPP;  in pc_clock_gettime()
276 	if (cd.clk->ops.clock_getres)  in pc_clock_getres()
277 		err = cd.clk->ops.clock_getres(cd.clk, ts);  in pc_clock_getres()
279 		err = -EOPNOTSUPP;  in pc_clock_getres()
292 		return -EINVAL;  in pc_clock_settime()
298 	if ((cd.fp->f_mode & FMODE_WRITE) == 0) {  in pc_clock_settime()
299 		err = -EACCES;  in pc_clock_settime()
303 	if (cd.clk->ops.clock_settime)  in pc_clock_settime()
304 		err = cd.clk->ops.clock_settime(cd.clk, ts);  in pc_clock_settime()
306 		err = -EOPNOTSUPP;  in pc_clock_settime()