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()
97 	struct posix_clock_context *pccontext = fp->private_data;  in posix_clock_compat_ioctl()
98 	struct posix_clock *clk = get_posix_clock(fp);  in posix_clock_compat_ioctl()  local
99 	int err = -ENOTTY;  in posix_clock_compat_ioctl()
101 	if (!clk)  in posix_clock_compat_ioctl()
102 		return -ENODEV;  in posix_clock_compat_ioctl()
104 	if (clk->ops.ioctl)  in posix_clock_compat_ioctl()
105 		err = clk->ops.ioctl(pccontext, cmd, arg);  in posix_clock_compat_ioctl()
107 	put_posix_clock(clk);  in posix_clock_compat_ioctl()
116 	struct posix_clock *clk =  in posix_clock_open()  local
117 		container_of(inode->i_cdev, struct posix_clock, cdev);  in posix_clock_open()
120 	down_read(&clk->rwsem);  in posix_clock_open()
122 	if (clk->zombie) {  in posix_clock_open()
123 		err = -ENODEV;  in posix_clock_open()
128 		err = -ENOMEM;  in posix_clock_open()
131 	pccontext->clk = clk;  in posix_clock_open()
132 	fp->private_data = pccontext;  in posix_clock_open()
133 	if (clk->ops.open)  in posix_clock_open()
134 		err = clk->ops.open(pccontext, fp->f_mode);  in posix_clock_open()
139 		get_device(clk->dev);  in posix_clock_open()
142 	up_read(&clk->rwsem);  in posix_clock_open()
148 	struct posix_clock_context *pccontext = fp->private_data;  in posix_clock_release()
149 	struct posix_clock *clk;  in posix_clock_release()  local
153 		return -ENODEV;  in posix_clock_release()
154 	clk = pccontext->clk;  in posix_clock_release()
156 	if (clk->ops.release)  in posix_clock_release()
157 		err = clk->ops.release(pccontext);  in posix_clock_release()
159 	put_device(clk->dev);  in posix_clock_release()
162 	fp->private_data = NULL;  in posix_clock_release()
180 int posix_clock_register(struct posix_clock *clk, struct device *dev)  in posix_clock_register()  argument
184 	init_rwsem(&clk->rwsem);  in posix_clock_register()
186 	cdev_init(&clk->cdev, &posix_clock_file_operations);  in posix_clock_register()
187 	err = cdev_device_add(&clk->cdev, dev);  in posix_clock_register()
190 			dev_name(dev), MAJOR(dev->devt), MINOR(dev->devt));  in posix_clock_register()
193 	clk->cdev.owner = clk->ops.owner;  in posix_clock_register()
194 	clk->dev = dev;  in posix_clock_register()
200 void posix_clock_unregister(struct posix_clock *clk)  in posix_clock_unregister()  argument
202 	cdev_device_del(&clk->cdev, clk->dev);  in posix_clock_unregister()
204 	down_write(&clk->rwsem);  in posix_clock_unregister()
205 	clk->zombie = true;  in posix_clock_unregister()
206 	up_write(&clk->rwsem);  in posix_clock_unregister()
208 	put_device(clk->dev);  in posix_clock_unregister()
214 	struct posix_clock *clk;  member
220 	int err = -EINVAL;  in get_clock_desc()
225 	if (fp->f_op->open != posix_clock_open || !fp->private_data)  in get_clock_desc()
228 	cd->fp = fp;  in get_clock_desc()
229 	cd->clk = get_posix_clock(fp);  in get_clock_desc()
231 	err = cd->clk ? 0 : -ENODEV;  in get_clock_desc()
240 	put_posix_clock(cd->clk);  in put_clock_desc()
241 	fput(cd->fp);  in put_clock_desc()
253 	if ((cd.fp->f_mode & FMODE_WRITE) == 0) {  in pc_clock_adjtime()
254 		err = -EACCES;  in pc_clock_adjtime()
258 	if (cd.clk->ops.clock_adjtime)  in pc_clock_adjtime()
259 		err = cd.clk->ops.clock_adjtime(cd.clk, tx);  in pc_clock_adjtime()
261 		err = -EOPNOTSUPP;  in pc_clock_adjtime()
277 	if (cd.clk->ops.clock_gettime)  in pc_clock_gettime()
278 		err = cd.clk->ops.clock_gettime(cd.clk, ts);  in pc_clock_gettime()
280 		err = -EOPNOTSUPP;  in pc_clock_gettime()
296 	if (cd.clk->ops.clock_getres)  in pc_clock_getres()
297 		err = cd.clk->ops.clock_getres(cd.clk, ts);  in pc_clock_getres()
299 		err = -EOPNOTSUPP;  in pc_clock_getres()
315 	if ((cd.fp->f_mode & FMODE_WRITE) == 0) {  in pc_clock_settime()
316 		err = -EACCES;  in pc_clock_settime()
320 	if (cd.clk->ops.clock_settime)  in pc_clock_settime()
321 		err = cd.clk->ops.clock_settime(cd.clk, ts);  in pc_clock_settime()
323 		err = -EOPNOTSUPP;  in pc_clock_settime()