blob: e8b933111e0df78f100ba1ed0459b9d511afec55 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * IBM ASM Service Processor Device Driver
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 *
18 * Copyright (C) IBM Corporation, 2004
19 *
Al Virod36b6912011-12-29 17:09:01 -050020 * Author: Max Asböck <amax@us.ibm.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021 *
22 */
23
24/*
Dmitry Torokhov3110dc72007-07-17 04:03:58 -070025 * Parts of this code are based on an article by Jonathan Corbet
Linus Torvalds1da177e2005-04-16 15:20:36 -070026 * that appeared in Linux Weekly News.
27 */
28
29
30/*
31 * The IBMASM file virtual filesystem. It creates the following hierarchy
Justin P. Mattock5ecd602e2011-04-08 08:23:23 -070032 * dynamically when mounted from user space:
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 *
34 * /ibmasm
35 * |-- 0
36 * | |-- command
37 * | |-- event
38 * | |-- reverse_heartbeat
39 * | `-- remote_video
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 * | |-- depth
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 * | |-- height
42 * | `-- width
43 * .
44 * .
45 * .
46 * `-- n
47 * |-- command
48 * |-- event
49 * |-- reverse_heartbeat
50 * `-- remote_video
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 * |-- depth
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 * |-- height
53 * `-- width
54 *
55 * For each service processor the following files are created:
56 *
57 * command: execute dot commands
Dmitry Torokhov3110dc72007-07-17 04:03:58 -070058 * write: execute a dot command on the service processor
59 * read: return the result of a previously executed dot command
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 *
61 * events: listen for service processor events
Dmitry Torokhov3110dc72007-07-17 04:03:58 -070062 * read: sleep (interruptible) until an event occurs
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 * write: wakeup sleeping event listener
64 *
65 * reverse_heartbeat: send a heartbeat to the service processor
Dmitry Torokhov3110dc72007-07-17 04:03:58 -070066 * read: sleep (interruptible) until the reverse heartbeat fails
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 * write: wakeup sleeping heartbeat listener
68 *
69 * remote_video/width
70 * remote_video/height
71 * remote_video/width: control remote display settings
Dmitry Torokhov3110dc72007-07-17 04:03:58 -070072 * write: set value
73 * read: read value
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 */
75
76#include <linux/fs.h>
77#include <linux/pagemap.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090078#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070079#include <asm/uaccess.h>
80#include <asm/io.h>
81#include "ibmasm.h"
82#include "remote.h"
83#include "dot_command.h"
84
85#define IBMASMFS_MAGIC 0x66726f67
86
87static LIST_HEAD(service_processors);
88
89static struct inode *ibmasmfs_make_inode(struct super_block *sb, int mode);
Al Viro318ceed2012-02-12 22:08:01 -050090static void ibmasmfs_create_files (struct super_block *sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091static int ibmasmfs_fill_super (struct super_block *sb, void *data, int silent);
92
93
Al Virofc14f2f2010-07-25 01:48:30 +040094static struct dentry *ibmasmfs_mount(struct file_system_type *fst,
95 int flags, const char *name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -070096{
Al Virofc14f2f2010-07-25 01:48:30 +040097 return mount_single(fst, flags, data, ibmasmfs_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -070098}
99
Alexey Dobriyanb87221d2009-09-21 17:01:09 -0700100static const struct super_operations ibmasmfs_s_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 .statfs = simple_statfs,
102 .drop_inode = generic_delete_inode,
103};
104
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800105static const struct file_operations *ibmasmfs_dir_ops = &simple_dir_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106
107static struct file_system_type ibmasmfs_type = {
108 .owner = THIS_MODULE,
109 .name = "ibmasmfs",
Al Virofc14f2f2010-07-25 01:48:30 +0400110 .mount = ibmasmfs_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 .kill_sb = kill_litter_super,
112};
Eric W. Biederman7f78e032013-03-02 19:39:14 -0800113MODULE_ALIAS_FS("ibmasmfs");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
115static int ibmasmfs_fill_super (struct super_block *sb, void *data, int silent)
116{
117 struct inode *root;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118
119 sb->s_blocksize = PAGE_CACHE_SIZE;
120 sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
121 sb->s_magic = IBMASMFS_MAGIC;
122 sb->s_op = &ibmasmfs_s_ops;
123 sb->s_time_gran = 1;
124
125 root = ibmasmfs_make_inode (sb, S_IFDIR | 0500);
126 if (!root)
127 return -ENOMEM;
128
129 root->i_op = &simple_dir_inode_operations;
130 root->i_fop = ibmasmfs_dir_ops;
131
Al Viro318ceed2012-02-12 22:08:01 -0500132 sb->s_root = d_make_root(root);
133 if (!sb->s_root)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135
Al Viro318ceed2012-02-12 22:08:01 -0500136 ibmasmfs_create_files(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 return 0;
138}
139
140static struct inode *ibmasmfs_make_inode(struct super_block *sb, int mode)
141{
142 struct inode *ret = new_inode(sb);
143
144 if (ret) {
Christoph Hellwig85fe4022010-10-23 11:19:54 -0400145 ret->i_ino = get_next_ino();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 ret->i_mode = mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME;
148 }
149 return ret;
150}
151
Al Viro0507c782013-07-19 18:09:56 +0400152static struct dentry *ibmasmfs_create_file(struct dentry *parent,
Dmitry Torokhov3110dc72007-07-17 04:03:58 -0700153 const char *name,
Arjan van de Vend54b1fd2007-02-12 00:55:34 -0800154 const struct file_operations *fops,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 void *data,
156 int mode)
157{
158 struct dentry *dentry;
159 struct inode *inode;
160
161 dentry = d_alloc_name(parent, name);
162 if (!dentry)
163 return NULL;
164
Al Viro0507c782013-07-19 18:09:56 +0400165 inode = ibmasmfs_make_inode(parent->d_sb, S_IFREG | mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 if (!inode) {
167 dput(dentry);
168 return NULL;
169 }
170
171 inode->i_fop = fops;
Theodore Ts'o8e18e292006-09-27 01:50:46 -0700172 inode->i_private = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
174 d_add(dentry, inode);
175 return dentry;
176}
177
Al Viro0507c782013-07-19 18:09:56 +0400178static struct dentry *ibmasmfs_create_dir(struct dentry *parent,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 const char *name)
180{
181 struct dentry *dentry;
182 struct inode *inode;
183
184 dentry = d_alloc_name(parent, name);
185 if (!dentry)
186 return NULL;
187
Al Viro0507c782013-07-19 18:09:56 +0400188 inode = ibmasmfs_make_inode(parent->d_sb, S_IFDIR | 0500);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 if (!inode) {
190 dput(dentry);
191 return NULL;
192 }
193
194 inode->i_op = &simple_dir_inode_operations;
195 inode->i_fop = ibmasmfs_dir_ops;
196
197 d_add(dentry, inode);
198 return dentry;
199}
200
201int ibmasmfs_register(void)
202{
203 return register_filesystem(&ibmasmfs_type);
204}
205
206void ibmasmfs_unregister(void)
207{
208 unregister_filesystem(&ibmasmfs_type);
209}
210
211void ibmasmfs_add_sp(struct service_processor *sp)
212{
213 list_add(&sp->node, &service_processors);
214}
215
216/* struct to save state between command file operations */
217struct ibmasmfs_command_data {
218 struct service_processor *sp;
219 struct command *command;
220};
221
222/* struct to save state between event file operations */
223struct ibmasmfs_event_data {
224 struct service_processor *sp;
225 struct event_reader reader;
226 int active;
227};
228
229/* struct to save state between reverse heartbeat file operations */
230struct ibmasmfs_heartbeat_data {
231 struct service_processor *sp;
232 struct reverse_heartbeat heartbeat;
233 int active;
234};
235
236static int command_file_open(struct inode *inode, struct file *file)
237{
238 struct ibmasmfs_command_data *command_data;
239
Theodore Ts'o8e18e292006-09-27 01:50:46 -0700240 if (!inode->i_private)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 return -ENODEV;
242
243 command_data = kmalloc(sizeof(struct ibmasmfs_command_data), GFP_KERNEL);
244 if (!command_data)
245 return -ENOMEM;
246
247 command_data->command = NULL;
Theodore Ts'o8e18e292006-09-27 01:50:46 -0700248 command_data->sp = inode->i_private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 file->private_data = command_data;
250 return 0;
251}
252
253static int command_file_close(struct inode *inode, struct file *file)
254{
255 struct ibmasmfs_command_data *command_data = file->private_data;
256
257 if (command_data->command)
Dmitry Torokhov3110dc72007-07-17 04:03:58 -0700258 command_put(command_data->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
260 kfree(command_data);
261 return 0;
262}
263
264static ssize_t command_file_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
265{
266 struct ibmasmfs_command_data *command_data = file->private_data;
267 struct command *cmd;
268 int len;
269 unsigned long flags;
270
271 if (*offset < 0)
272 return -EINVAL;
273 if (count == 0 || count > IBMASM_CMD_MAX_BUFFER_SIZE)
274 return 0;
275 if (*offset != 0)
276 return 0;
277
278 spin_lock_irqsave(&command_data->sp->lock, flags);
279 cmd = command_data->command;
280 if (cmd == NULL) {
281 spin_unlock_irqrestore(&command_data->sp->lock, flags);
282 return 0;
283 }
284 command_data->command = NULL;
285 spin_unlock_irqrestore(&command_data->sp->lock, flags);
286
287 if (cmd->status != IBMASM_CMD_COMPLETE) {
288 command_put(cmd);
289 return -EIO;
290 }
291 len = min(count, cmd->buffer_size);
292 if (copy_to_user(buf, cmd->buffer, len)) {
293 command_put(cmd);
294 return -EFAULT;
295 }
296 command_put(cmd);
297
298 return len;
299}
300
301static ssize_t command_file_write(struct file *file, const char __user *ubuff, size_t count, loff_t *offset)
302{
303 struct ibmasmfs_command_data *command_data = file->private_data;
304 struct command *cmd;
305 unsigned long flags;
306
307 if (*offset < 0)
308 return -EINVAL;
309 if (count == 0 || count > IBMASM_CMD_MAX_BUFFER_SIZE)
310 return 0;
311 if (*offset != 0)
312 return 0;
313
314 /* commands are executed sequentially, only one command at a time */
315 if (command_data->command)
316 return -EAGAIN;
317
Max Asbock88187602005-06-21 17:16:36 -0700318 cmd = ibmasm_new_command(command_data->sp, count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 if (!cmd)
320 return -ENOMEM;
321
322 if (copy_from_user(cmd->buffer, ubuff, count)) {
323 command_put(cmd);
324 return -EFAULT;
325 }
326
327 spin_lock_irqsave(&command_data->sp->lock, flags);
328 if (command_data->command) {
329 spin_unlock_irqrestore(&command_data->sp->lock, flags);
330 command_put(cmd);
331 return -EAGAIN;
332 }
333 command_data->command = cmd;
334 spin_unlock_irqrestore(&command_data->sp->lock, flags);
335
336 ibmasm_exec_command(command_data->sp, cmd);
337 ibmasm_wait_for_response(cmd, get_dot_command_timeout(cmd->buffer));
338
339 return count;
340}
341
342static int event_file_open(struct inode *inode, struct file *file)
343{
344 struct ibmasmfs_event_data *event_data;
Dmitry Torokhov3110dc72007-07-17 04:03:58 -0700345 struct service_processor *sp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
Theodore Ts'o8e18e292006-09-27 01:50:46 -0700347 if (!inode->i_private)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 return -ENODEV;
349
Theodore Ts'o8e18e292006-09-27 01:50:46 -0700350 sp = inode->i_private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
352 event_data = kmalloc(sizeof(struct ibmasmfs_event_data), GFP_KERNEL);
353 if (!event_data)
354 return -ENOMEM;
355
356 ibmasm_event_reader_register(sp, &event_data->reader);
357
358 event_data->sp = sp;
Max Asbockb8acb802005-06-21 17:16:33 -0700359 event_data->active = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 file->private_data = event_data;
361 return 0;
362}
363
364static int event_file_close(struct inode *inode, struct file *file)
365{
366 struct ibmasmfs_event_data *event_data = file->private_data;
367
368 ibmasm_event_reader_unregister(event_data->sp, &event_data->reader);
369 kfree(event_data);
370 return 0;
371}
372
373static ssize_t event_file_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
374{
375 struct ibmasmfs_event_data *event_data = file->private_data;
376 struct event_reader *reader = &event_data->reader;
Max Asbockb8acb802005-06-21 17:16:33 -0700377 struct service_processor *sp = event_data->sp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 int ret;
Max Asbockb8acb802005-06-21 17:16:33 -0700379 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
381 if (*offset < 0)
382 return -EINVAL;
383 if (count == 0 || count > IBMASM_EVENT_MAX_SIZE)
384 return 0;
385 if (*offset != 0)
386 return 0;
387
Max Asbockb8acb802005-06-21 17:16:33 -0700388 spin_lock_irqsave(&sp->lock, flags);
389 if (event_data->active) {
390 spin_unlock_irqrestore(&sp->lock, flags);
391 return -EBUSY;
392 }
393 event_data->active = 1;
394 spin_unlock_irqrestore(&sp->lock, flags);
395
396 ret = ibmasm_get_next_event(sp, reader);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 if (ret <= 0)
Max Asbockb8acb802005-06-21 17:16:33 -0700398 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399
Max Asbockb8acb802005-06-21 17:16:33 -0700400 if (count < reader->data_size) {
401 ret = -EINVAL;
402 goto out;
403 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404
Max Asbockb8acb802005-06-21 17:16:33 -0700405 if (copy_to_user(buf, reader->data, reader->data_size)) {
406 ret = -EFAULT;
407 goto out;
408 }
409 ret = reader->data_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410
Max Asbockb8acb802005-06-21 17:16:33 -0700411out:
412 event_data->active = 0;
413 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414}
415
416static ssize_t event_file_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
417{
418 struct ibmasmfs_event_data *event_data = file->private_data;
419
420 if (*offset < 0)
421 return -EINVAL;
422 if (count != 1)
423 return 0;
424 if (*offset != 0)
425 return 0;
426
Max Asbockb8acb802005-06-21 17:16:33 -0700427 ibmasm_cancel_next_event(&event_data->reader);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 return 0;
429}
430
431static int r_heartbeat_file_open(struct inode *inode, struct file *file)
432{
433 struct ibmasmfs_heartbeat_data *rhbeat;
434
Theodore Ts'o8e18e292006-09-27 01:50:46 -0700435 if (!inode->i_private)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 return -ENODEV;
437
438 rhbeat = kmalloc(sizeof(struct ibmasmfs_heartbeat_data), GFP_KERNEL);
439 if (!rhbeat)
440 return -ENOMEM;
441
Theodore Ts'o8e18e292006-09-27 01:50:46 -0700442 rhbeat->sp = inode->i_private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 rhbeat->active = 0;
444 ibmasm_init_reverse_heartbeat(rhbeat->sp, &rhbeat->heartbeat);
445 file->private_data = rhbeat;
446 return 0;
447}
448
449static int r_heartbeat_file_close(struct inode *inode, struct file *file)
450{
451 struct ibmasmfs_heartbeat_data *rhbeat = file->private_data;
452
453 kfree(rhbeat);
454 return 0;
455}
456
457static ssize_t r_heartbeat_file_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
458{
459 struct ibmasmfs_heartbeat_data *rhbeat = file->private_data;
460 unsigned long flags;
461 int result;
462
463 if (*offset < 0)
464 return -EINVAL;
465 if (count == 0 || count > 1024)
466 return 0;
467 if (*offset != 0)
468 return 0;
469
470 /* allow only one reverse heartbeat per process */
471 spin_lock_irqsave(&rhbeat->sp->lock, flags);
472 if (rhbeat->active) {
473 spin_unlock_irqrestore(&rhbeat->sp->lock, flags);
474 return -EBUSY;
475 }
476 rhbeat->active = 1;
477 spin_unlock_irqrestore(&rhbeat->sp->lock, flags);
478
479 result = ibmasm_start_reverse_heartbeat(rhbeat->sp, &rhbeat->heartbeat);
480 rhbeat->active = 0;
481
482 return result;
483}
484
485static ssize_t r_heartbeat_file_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
486{
487 struct ibmasmfs_heartbeat_data *rhbeat = file->private_data;
488
489 if (*offset < 0)
490 return -EINVAL;
491 if (count != 1)
492 return 0;
493 if (*offset != 0)
494 return 0;
495
496 if (rhbeat->active)
497 ibmasm_stop_reverse_heartbeat(&rhbeat->heartbeat);
498
499 return 1;
500}
501
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502static int remote_settings_file_close(struct inode *inode, struct file *file)
503{
504 return 0;
505}
506
507static ssize_t remote_settings_file_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
508{
509 void __iomem *address = (void __iomem *)file->private_data;
510 unsigned char *page;
511 int retval;
512 int len = 0;
513 unsigned int value;
514
515 if (*offset < 0)
516 return -EINVAL;
517 if (count == 0 || count > 1024)
518 return 0;
519 if (*offset != 0)
520 return 0;
521
522 page = (unsigned char *)__get_free_page(GFP_KERNEL);
523 if (!page)
524 return -ENOMEM;
525
526 value = readl(address);
527 len = sprintf(page, "%d\n", value);
528
529 if (copy_to_user(buf, page, len)) {
530 retval = -EFAULT;
531 goto exit;
532 }
533 *offset += len;
534 retval = len;
535
536exit:
537 free_page((unsigned long)page);
538 return retval;
539}
540
541static ssize_t remote_settings_file_write(struct file *file, const char __user *ubuff, size_t count, loff_t *offset)
542{
543 void __iomem *address = (void __iomem *)file->private_data;
544 char *buff;
545 unsigned int value;
546
547 if (*offset < 0)
548 return -EINVAL;
549 if (count == 0 || count > 1024)
550 return 0;
551 if (*offset != 0)
552 return 0;
553
Yoann Padioleaudd00cc42007-07-19 01:49:03 -0700554 buff = kzalloc (count + 1, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 if (!buff)
556 return -ENOMEM;
557
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558
559 if (copy_from_user(buff, ubuff, count)) {
560 kfree(buff);
561 return -EFAULT;
562 }
Dmitry Torokhov3110dc72007-07-17 04:03:58 -0700563
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 value = simple_strtoul(buff, NULL, 10);
565 writel(value, address);
566 kfree(buff);
567
568 return count;
569}
570
Arjan van de Vend54b1fd2007-02-12 00:55:34 -0800571static const struct file_operations command_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 .open = command_file_open,
573 .release = command_file_close,
574 .read = command_file_read,
575 .write = command_file_write,
Arnd Bergmann275bd412010-07-06 22:54:51 +0200576 .llseek = generic_file_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577};
578
Arjan van de Vend54b1fd2007-02-12 00:55:34 -0800579static const struct file_operations event_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 .open = event_file_open,
581 .release = event_file_close,
582 .read = event_file_read,
583 .write = event_file_write,
Arnd Bergmann275bd412010-07-06 22:54:51 +0200584 .llseek = generic_file_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585};
586
Arjan van de Vend54b1fd2007-02-12 00:55:34 -0800587static const struct file_operations r_heartbeat_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 .open = r_heartbeat_file_open,
589 .release = r_heartbeat_file_close,
590 .read = r_heartbeat_file_read,
591 .write = r_heartbeat_file_write,
Arnd Bergmann275bd412010-07-06 22:54:51 +0200592 .llseek = generic_file_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593};
594
Arjan van de Vend54b1fd2007-02-12 00:55:34 -0800595static const struct file_operations remote_settings_fops = {
Stephen Boyd234e3402012-04-05 14:25:11 -0700596 .open = simple_open,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597 .release = remote_settings_file_close,
598 .read = remote_settings_file_read,
599 .write = remote_settings_file_write,
Arnd Bergmann275bd412010-07-06 22:54:51 +0200600 .llseek = generic_file_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601};
602
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603
Al Viro318ceed2012-02-12 22:08:01 -0500604static void ibmasmfs_create_files (struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605{
606 struct list_head *entry;
607 struct service_processor *sp;
608
609 list_for_each(entry, &service_processors) {
610 struct dentry *dir;
611 struct dentry *remote_dir;
612 sp = list_entry(entry, struct service_processor, node);
Al Viro0507c782013-07-19 18:09:56 +0400613 dir = ibmasmfs_create_dir(sb->s_root, sp->dirname);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 if (!dir)
615 continue;
616
Al Viro0507c782013-07-19 18:09:56 +0400617 ibmasmfs_create_file(dir, "command", &command_fops, sp, S_IRUSR|S_IWUSR);
618 ibmasmfs_create_file(dir, "event", &event_fops, sp, S_IRUSR|S_IWUSR);
619 ibmasmfs_create_file(dir, "reverse_heartbeat", &r_heartbeat_fops, sp, S_IRUSR|S_IWUSR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620
Al Viro0507c782013-07-19 18:09:56 +0400621 remote_dir = ibmasmfs_create_dir(dir, "remote_video");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 if (!remote_dir)
623 continue;
624
Al Viro0507c782013-07-19 18:09:56 +0400625 ibmasmfs_create_file(remote_dir, "width", &remote_settings_fops, (void *)display_width(sp), S_IRUSR|S_IWUSR);
626 ibmasmfs_create_file(remote_dir, "height", &remote_settings_fops, (void *)display_height(sp), S_IRUSR|S_IWUSR);
627 ibmasmfs_create_file(remote_dir, "depth", &remote_settings_fops, (void *)display_depth(sp), S_IRUSR|S_IWUSR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 }
629}