Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * ALSA sequencer Client Manager |
| 3 | * Copyright (c) 1998-2001 by Frank van de Pol <fvdpol@coil.demon.nl> |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 4 | * Jaroslav Kysela <perex@perex.cz> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Takashi Iwai <tiwai@suse.de> |
| 6 | * |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | * |
| 22 | */ |
| 23 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/init.h> |
Paul Gortmaker | d81a6d7 | 2011-09-22 09:34:58 -0400 | [diff] [blame^] | 25 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/slab.h> |
| 27 | #include <sound/core.h> |
| 28 | #include <sound/minors.h> |
| 29 | #include <linux/kmod.h> |
| 30 | |
| 31 | #include <sound/seq_kernel.h> |
| 32 | #include "seq_clientmgr.h" |
| 33 | #include "seq_memory.h" |
| 34 | #include "seq_queue.h" |
| 35 | #include "seq_timer.h" |
| 36 | #include "seq_info.h" |
| 37 | #include "seq_system.h" |
| 38 | #include <sound/seq_device.h> |
| 39 | #ifdef CONFIG_COMPAT |
| 40 | #include <linux/compat.h> |
| 41 | #endif |
| 42 | |
| 43 | /* Client Manager |
| 44 | |
| 45 | * this module handles the connections of userland and kernel clients |
| 46 | * |
| 47 | */ |
| 48 | |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 49 | /* |
| 50 | * There are four ranges of client numbers (last two shared): |
| 51 | * 0..15: global clients |
| 52 | * 16..127: statically allocated client numbers for cards 0..27 |
| 53 | * 128..191: dynamically allocated client numbers for cards 28..31 |
| 54 | * 128..191: dynamically allocated client numbers for applications |
| 55 | */ |
| 56 | |
| 57 | /* number of kernel non-card clients */ |
| 58 | #define SNDRV_SEQ_GLOBAL_CLIENTS 16 |
| 59 | /* clients per cards, for static clients */ |
| 60 | #define SNDRV_SEQ_CLIENTS_PER_CARD 4 |
| 61 | /* dynamically allocated client numbers (both kernel drivers and user space) */ |
| 62 | #define SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN 128 |
Clemens Ladisch | d001544 | 2005-11-20 14:09:05 +0100 | [diff] [blame] | 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #define SNDRV_SEQ_LFLG_INPUT 0x0001 |
| 65 | #define SNDRV_SEQ_LFLG_OUTPUT 0x0002 |
| 66 | #define SNDRV_SEQ_LFLG_OPEN (SNDRV_SEQ_LFLG_INPUT|SNDRV_SEQ_LFLG_OUTPUT) |
| 67 | |
| 68 | static DEFINE_SPINLOCK(clients_lock); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 69 | static DEFINE_MUTEX(register_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
| 71 | /* |
| 72 | * client table |
| 73 | */ |
| 74 | static char clienttablock[SNDRV_SEQ_MAX_CLIENTS]; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 75 | static struct snd_seq_client *clienttab[SNDRV_SEQ_MAX_CLIENTS]; |
| 76 | static struct snd_seq_usage client_usage; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
| 78 | /* |
| 79 | * prototypes |
| 80 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 81 | static int bounce_error_event(struct snd_seq_client *client, |
| 82 | struct snd_seq_event *event, |
| 83 | int err, int atomic, int hop); |
| 84 | static int snd_seq_deliver_single_event(struct snd_seq_client *client, |
| 85 | struct snd_seq_event *event, |
| 86 | int filter, int atomic, int hop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
| 88 | /* |
| 89 | */ |
| 90 | |
| 91 | static inline mm_segment_t snd_enter_user(void) |
| 92 | { |
| 93 | mm_segment_t fs = get_fs(); |
| 94 | set_fs(get_ds()); |
| 95 | return fs; |
| 96 | } |
| 97 | |
| 98 | static inline void snd_leave_user(mm_segment_t fs) |
| 99 | { |
| 100 | set_fs(fs); |
| 101 | } |
| 102 | |
| 103 | /* |
| 104 | */ |
| 105 | static inline unsigned short snd_seq_file_flags(struct file *file) |
| 106 | { |
| 107 | switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { |
| 108 | case FMODE_WRITE: |
| 109 | return SNDRV_SEQ_LFLG_OUTPUT; |
| 110 | case FMODE_READ: |
| 111 | return SNDRV_SEQ_LFLG_INPUT; |
| 112 | default: |
| 113 | return SNDRV_SEQ_LFLG_OPEN; |
| 114 | } |
| 115 | } |
| 116 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 117 | static inline int snd_seq_write_pool_allocated(struct snd_seq_client *client) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | { |
| 119 | return snd_seq_total_cells(client->pool) > 0; |
| 120 | } |
| 121 | |
| 122 | /* return pointer to client structure for specified id */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 123 | static struct snd_seq_client *clientptr(int clientid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | { |
| 125 | if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 126 | snd_printd("Seq: oops. Trying to get pointer to client %d\n", |
| 127 | clientid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | return NULL; |
| 129 | } |
| 130 | return clienttab[clientid]; |
| 131 | } |
| 132 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 133 | struct snd_seq_client *snd_seq_client_use_ptr(int clientid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | { |
| 135 | unsigned long flags; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 136 | struct snd_seq_client *client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
| 138 | if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 139 | snd_printd("Seq: oops. Trying to get pointer to client %d\n", |
| 140 | clientid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | return NULL; |
| 142 | } |
| 143 | spin_lock_irqsave(&clients_lock, flags); |
| 144 | client = clientptr(clientid); |
| 145 | if (client) |
| 146 | goto __lock; |
| 147 | if (clienttablock[clientid]) { |
| 148 | spin_unlock_irqrestore(&clients_lock, flags); |
| 149 | return NULL; |
| 150 | } |
| 151 | spin_unlock_irqrestore(&clients_lock, flags); |
Johannes Berg | ee2da99 | 2008-07-09 10:28:41 +0200 | [diff] [blame] | 152 | #ifdef CONFIG_MODULES |
Jan Blunck | 0d63e4f | 2008-02-14 19:34:28 -0800 | [diff] [blame] | 153 | if (!in_interrupt()) { |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 154 | static char client_requested[SNDRV_SEQ_GLOBAL_CLIENTS]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | static char card_requested[SNDRV_CARDS]; |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 156 | if (clientid < SNDRV_SEQ_GLOBAL_CLIENTS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | int idx; |
| 158 | |
Jan Blunck | 0d63e4f | 2008-02-14 19:34:28 -0800 | [diff] [blame] | 159 | if (!client_requested[clientid]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | client_requested[clientid] = 1; |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 161 | for (idx = 0; idx < 15; idx++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | if (seq_client_load[idx] < 0) |
| 163 | break; |
| 164 | if (seq_client_load[idx] == clientid) { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 165 | request_module("snd-seq-client-%i", |
| 166 | clientid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | break; |
| 168 | } |
| 169 | } |
| 170 | } |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 171 | } else if (clientid < SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN) { |
| 172 | int card = (clientid - SNDRV_SEQ_GLOBAL_CLIENTS) / |
| 173 | SNDRV_SEQ_CLIENTS_PER_CARD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | if (card < snd_ecards_limit) { |
| 175 | if (! card_requested[card]) { |
| 176 | card_requested[card] = 1; |
| 177 | snd_request_card(card); |
| 178 | } |
| 179 | snd_seq_device_load_drivers(); |
| 180 | } |
| 181 | } |
| 182 | spin_lock_irqsave(&clients_lock, flags); |
| 183 | client = clientptr(clientid); |
| 184 | if (client) |
| 185 | goto __lock; |
| 186 | spin_unlock_irqrestore(&clients_lock, flags); |
| 187 | } |
| 188 | #endif |
| 189 | return NULL; |
| 190 | |
| 191 | __lock: |
| 192 | snd_use_lock_use(&client->use_lock); |
| 193 | spin_unlock_irqrestore(&clients_lock, flags); |
| 194 | return client; |
| 195 | } |
| 196 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 197 | static void usage_alloc(struct snd_seq_usage *res, int num) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | { |
| 199 | res->cur += num; |
| 200 | if (res->cur > res->peak) |
| 201 | res->peak = res->cur; |
| 202 | } |
| 203 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 204 | static void usage_free(struct snd_seq_usage *res, int num) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | { |
| 206 | res->cur -= num; |
| 207 | } |
| 208 | |
| 209 | /* initialise data structures */ |
| 210 | int __init client_init_data(void) |
| 211 | { |
| 212 | /* zap out the client table */ |
| 213 | memset(&clienttablock, 0, sizeof(clienttablock)); |
| 214 | memset(&clienttab, 0, sizeof(clienttab)); |
| 215 | return 0; |
| 216 | } |
| 217 | |
| 218 | |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 219 | static struct snd_seq_client *seq_create_client1(int client_index, int poolsize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | { |
| 221 | unsigned long flags; |
| 222 | int c; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 223 | struct snd_seq_client *client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | |
| 225 | /* init client data */ |
Takashi Iwai | ecca82b | 2005-09-09 14:20:49 +0200 | [diff] [blame] | 226 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | if (client == NULL) |
| 228 | return NULL; |
| 229 | client->pool = snd_seq_pool_new(poolsize); |
| 230 | if (client->pool == NULL) { |
| 231 | kfree(client); |
| 232 | return NULL; |
| 233 | } |
| 234 | client->type = NO_CLIENT; |
| 235 | snd_use_lock_init(&client->use_lock); |
| 236 | rwlock_init(&client->ports_lock); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 237 | mutex_init(&client->ports_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | INIT_LIST_HEAD(&client->ports_list_head); |
| 239 | |
| 240 | /* find free slot in the client table */ |
| 241 | spin_lock_irqsave(&clients_lock, flags); |
| 242 | if (client_index < 0) { |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 243 | for (c = SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN; |
| 244 | c < SNDRV_SEQ_MAX_CLIENTS; |
| 245 | c++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | if (clienttab[c] || clienttablock[c]) |
| 247 | continue; |
| 248 | clienttab[client->number = c] = client; |
| 249 | spin_unlock_irqrestore(&clients_lock, flags); |
| 250 | return client; |
| 251 | } |
| 252 | } else { |
| 253 | if (clienttab[client_index] == NULL && !clienttablock[client_index]) { |
| 254 | clienttab[client->number = client_index] = client; |
| 255 | spin_unlock_irqrestore(&clients_lock, flags); |
| 256 | return client; |
| 257 | } |
| 258 | } |
| 259 | spin_unlock_irqrestore(&clients_lock, flags); |
| 260 | snd_seq_pool_delete(&client->pool); |
| 261 | kfree(client); |
| 262 | return NULL; /* no free slot found or busy, return failure code */ |
| 263 | } |
| 264 | |
| 265 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 266 | static int seq_free_client1(struct snd_seq_client *client) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | { |
| 268 | unsigned long flags; |
| 269 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 270 | if (!client) |
| 271 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | snd_seq_delete_all_ports(client); |
| 273 | snd_seq_queue_client_leave(client->number); |
| 274 | spin_lock_irqsave(&clients_lock, flags); |
| 275 | clienttablock[client->number] = 1; |
| 276 | clienttab[client->number] = NULL; |
| 277 | spin_unlock_irqrestore(&clients_lock, flags); |
| 278 | snd_use_lock_sync(&client->use_lock); |
| 279 | snd_seq_queue_client_termination(client->number); |
| 280 | if (client->pool) |
| 281 | snd_seq_pool_delete(&client->pool); |
| 282 | spin_lock_irqsave(&clients_lock, flags); |
| 283 | clienttablock[client->number] = 0; |
| 284 | spin_unlock_irqrestore(&clients_lock, flags); |
| 285 | return 0; |
| 286 | } |
| 287 | |
| 288 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 289 | static void seq_free_client(struct snd_seq_client * client) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 291 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | switch (client->type) { |
| 293 | case NO_CLIENT: |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 294 | snd_printk(KERN_WARNING "Seq: Trying to free unused client %d\n", |
| 295 | client->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | break; |
| 297 | case USER_CLIENT: |
| 298 | case KERNEL_CLIENT: |
| 299 | seq_free_client1(client); |
| 300 | usage_free(&client_usage, 1); |
| 301 | break; |
| 302 | |
| 303 | default: |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 304 | snd_printk(KERN_ERR "Seq: Trying to free client %d with undefined type = %d\n", |
| 305 | client->number, client->type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 307 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | |
| 309 | snd_seq_system_client_ev_client_exit(client->number); |
| 310 | } |
| 311 | |
| 312 | |
| 313 | |
| 314 | /* -------------------------------------------------------- */ |
| 315 | |
| 316 | /* create a user client */ |
| 317 | static int snd_seq_open(struct inode *inode, struct file *file) |
| 318 | { |
| 319 | int c, mode; /* client id */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 320 | struct snd_seq_client *client; |
| 321 | struct snd_seq_user_client *user; |
Takashi Iwai | 02f4865 | 2010-04-13 11:49:04 +0200 | [diff] [blame] | 322 | int err; |
| 323 | |
| 324 | err = nonseekable_open(inode, file); |
| 325 | if (err < 0) |
| 326 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 328 | if (mutex_lock_interruptible(®ister_mutex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | return -ERESTARTSYS; |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 330 | client = seq_create_client1(-1, SNDRV_SEQ_DEFAULT_EVENTS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | if (client == NULL) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 332 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | return -ENOMEM; /* failure code */ |
| 334 | } |
| 335 | |
| 336 | mode = snd_seq_file_flags(file); |
| 337 | if (mode & SNDRV_SEQ_LFLG_INPUT) |
| 338 | client->accept_input = 1; |
| 339 | if (mode & SNDRV_SEQ_LFLG_OUTPUT) |
| 340 | client->accept_output = 1; |
| 341 | |
| 342 | user = &client->data.user; |
| 343 | user->fifo = NULL; |
| 344 | user->fifo_pool_size = 0; |
| 345 | |
| 346 | if (mode & SNDRV_SEQ_LFLG_INPUT) { |
| 347 | user->fifo_pool_size = SNDRV_SEQ_DEFAULT_CLIENT_EVENTS; |
| 348 | user->fifo = snd_seq_fifo_new(user->fifo_pool_size); |
| 349 | if (user->fifo == NULL) { |
| 350 | seq_free_client1(client); |
| 351 | kfree(client); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 352 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | return -ENOMEM; |
| 354 | } |
| 355 | } |
| 356 | |
| 357 | usage_alloc(&client_usage, 1); |
| 358 | client->type = USER_CLIENT; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 359 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
| 361 | c = client->number; |
| 362 | file->private_data = client; |
| 363 | |
| 364 | /* fill client data */ |
| 365 | user->file = file; |
| 366 | sprintf(client->name, "Client-%d", c); |
| 367 | |
| 368 | /* make others aware this new client */ |
| 369 | snd_seq_system_client_ev_client_start(c); |
| 370 | |
| 371 | return 0; |
| 372 | } |
| 373 | |
| 374 | /* delete a user client */ |
| 375 | static int snd_seq_release(struct inode *inode, struct file *file) |
| 376 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 377 | struct snd_seq_client *client = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | |
| 379 | if (client) { |
| 380 | seq_free_client(client); |
| 381 | if (client->data.user.fifo) |
| 382 | snd_seq_fifo_delete(&client->data.user.fifo); |
| 383 | kfree(client); |
| 384 | } |
| 385 | |
| 386 | return 0; |
| 387 | } |
| 388 | |
| 389 | |
| 390 | /* handle client read() */ |
| 391 | /* possible error values: |
| 392 | * -ENXIO invalid client or file open mode |
| 393 | * -ENOSPC FIFO overflow (the flag is cleared after this error report) |
| 394 | * -EINVAL no enough user-space buffer to write the whole event |
| 395 | * -EFAULT seg. fault during copy to user space |
| 396 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 397 | static ssize_t snd_seq_read(struct file *file, char __user *buf, size_t count, |
| 398 | loff_t *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 400 | struct snd_seq_client *client = file->private_data; |
| 401 | struct snd_seq_fifo *fifo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | int err; |
| 403 | long result = 0; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 404 | struct snd_seq_event_cell *cell; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | |
| 406 | if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT)) |
| 407 | return -ENXIO; |
| 408 | |
| 409 | if (!access_ok(VERIFY_WRITE, buf, count)) |
| 410 | return -EFAULT; |
| 411 | |
| 412 | /* check client structures are in place */ |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 413 | if (snd_BUG_ON(!client)) |
| 414 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | |
| 416 | if (!client->accept_input || (fifo = client->data.user.fifo) == NULL) |
| 417 | return -ENXIO; |
| 418 | |
| 419 | if (atomic_read(&fifo->overflow) > 0) { |
| 420 | /* buffer overflow is detected */ |
| 421 | snd_seq_fifo_clear(fifo); |
| 422 | /* return error code */ |
| 423 | return -ENOSPC; |
| 424 | } |
| 425 | |
| 426 | cell = NULL; |
| 427 | err = 0; |
| 428 | snd_seq_fifo_lock(fifo); |
| 429 | |
| 430 | /* while data available in queue */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 431 | while (count >= sizeof(struct snd_seq_event)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | int nonblock; |
| 433 | |
| 434 | nonblock = (file->f_flags & O_NONBLOCK) || result > 0; |
| 435 | if ((err = snd_seq_fifo_cell_out(fifo, &cell, nonblock)) < 0) { |
| 436 | break; |
| 437 | } |
| 438 | if (snd_seq_ev_is_variable(&cell->event)) { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 439 | struct snd_seq_event tmpev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | tmpev = cell->event; |
| 441 | tmpev.data.ext.len &= ~SNDRV_SEQ_EXT_MASK; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 442 | if (copy_to_user(buf, &tmpev, sizeof(struct snd_seq_event))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | err = -EFAULT; |
| 444 | break; |
| 445 | } |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 446 | count -= sizeof(struct snd_seq_event); |
| 447 | buf += sizeof(struct snd_seq_event); |
Clemens Ladisch | 4d23359 | 2005-09-05 10:35:20 +0200 | [diff] [blame] | 448 | err = snd_seq_expand_var_event(&cell->event, count, |
| 449 | (char __force *)buf, 0, |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 450 | sizeof(struct snd_seq_event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | if (err < 0) |
| 452 | break; |
| 453 | result += err; |
| 454 | count -= err; |
| 455 | buf += err; |
| 456 | } else { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 457 | if (copy_to_user(buf, &cell->event, sizeof(struct snd_seq_event))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | err = -EFAULT; |
| 459 | break; |
| 460 | } |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 461 | count -= sizeof(struct snd_seq_event); |
| 462 | buf += sizeof(struct snd_seq_event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | } |
| 464 | snd_seq_cell_free(cell); |
| 465 | cell = NULL; /* to be sure */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 466 | result += sizeof(struct snd_seq_event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | } |
| 468 | |
| 469 | if (err < 0) { |
| 470 | if (cell) |
| 471 | snd_seq_fifo_cell_putback(fifo, cell); |
| 472 | if (err == -EAGAIN && result > 0) |
| 473 | err = 0; |
| 474 | } |
| 475 | snd_seq_fifo_unlock(fifo); |
| 476 | |
| 477 | return (err < 0) ? err : result; |
| 478 | } |
| 479 | |
| 480 | |
| 481 | /* |
| 482 | * check access permission to the port |
| 483 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 484 | static int check_port_perm(struct snd_seq_client_port *port, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | { |
| 486 | if ((port->capability & flags) != flags) |
| 487 | return 0; |
| 488 | return flags; |
| 489 | } |
| 490 | |
| 491 | /* |
| 492 | * check if the destination client is available, and return the pointer |
| 493 | * if filter is non-zero, client filter bitmap is tested. |
| 494 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 495 | static struct snd_seq_client *get_event_dest_client(struct snd_seq_event *event, |
| 496 | int filter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 498 | struct snd_seq_client *dest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | |
| 500 | dest = snd_seq_client_use_ptr(event->dest.client); |
| 501 | if (dest == NULL) |
| 502 | return NULL; |
| 503 | if (! dest->accept_input) |
| 504 | goto __not_avail; |
| 505 | if ((dest->filter & SNDRV_SEQ_FILTER_USE_EVENT) && |
| 506 | ! test_bit(event->type, dest->event_filter)) |
| 507 | goto __not_avail; |
| 508 | if (filter && !(dest->filter & filter)) |
| 509 | goto __not_avail; |
| 510 | |
| 511 | return dest; /* ok - accessible */ |
| 512 | __not_avail: |
| 513 | snd_seq_client_unlock(dest); |
| 514 | return NULL; |
| 515 | } |
| 516 | |
| 517 | |
| 518 | /* |
| 519 | * Return the error event. |
| 520 | * |
| 521 | * If the receiver client is a user client, the original event is |
| 522 | * encapsulated in SNDRV_SEQ_EVENT_BOUNCE as variable length event. If |
| 523 | * the original event is also variable length, the external data is |
| 524 | * copied after the event record. |
| 525 | * If the receiver client is a kernel client, the original event is |
| 526 | * quoted in SNDRV_SEQ_EVENT_KERNEL_ERROR, since this requires no extra |
| 527 | * kmalloc. |
| 528 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 529 | static int bounce_error_event(struct snd_seq_client *client, |
| 530 | struct snd_seq_event *event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | int err, int atomic, int hop) |
| 532 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 533 | struct snd_seq_event bounce_ev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | int result; |
| 535 | |
| 536 | if (client == NULL || |
| 537 | ! (client->filter & SNDRV_SEQ_FILTER_BOUNCE) || |
| 538 | ! client->accept_input) |
| 539 | return 0; /* ignored */ |
| 540 | |
| 541 | /* set up quoted error */ |
| 542 | memset(&bounce_ev, 0, sizeof(bounce_ev)); |
| 543 | bounce_ev.type = SNDRV_SEQ_EVENT_KERNEL_ERROR; |
| 544 | bounce_ev.flags = SNDRV_SEQ_EVENT_LENGTH_FIXED; |
| 545 | bounce_ev.queue = SNDRV_SEQ_QUEUE_DIRECT; |
| 546 | bounce_ev.source.client = SNDRV_SEQ_CLIENT_SYSTEM; |
| 547 | bounce_ev.source.port = SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE; |
| 548 | bounce_ev.dest.client = client->number; |
| 549 | bounce_ev.dest.port = event->source.port; |
| 550 | bounce_ev.data.quote.origin = event->dest; |
| 551 | bounce_ev.data.quote.event = event; |
| 552 | bounce_ev.data.quote.value = -err; /* use positive value */ |
| 553 | result = snd_seq_deliver_single_event(NULL, &bounce_ev, 0, atomic, hop + 1); |
| 554 | if (result < 0) { |
| 555 | client->event_lost++; |
| 556 | return result; |
| 557 | } |
| 558 | |
| 559 | return result; |
| 560 | } |
| 561 | |
| 562 | |
| 563 | /* |
| 564 | * rewrite the time-stamp of the event record with the curren time |
| 565 | * of the given queue. |
| 566 | * return non-zero if updated. |
| 567 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 568 | static int update_timestamp_of_queue(struct snd_seq_event *event, |
| 569 | int queue, int real_time) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 571 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | |
| 573 | q = queueptr(queue); |
| 574 | if (! q) |
| 575 | return 0; |
| 576 | event->queue = queue; |
| 577 | event->flags &= ~SNDRV_SEQ_TIME_STAMP_MASK; |
| 578 | if (real_time) { |
| 579 | event->time.time = snd_seq_timer_get_cur_time(q->timer); |
| 580 | event->flags |= SNDRV_SEQ_TIME_STAMP_REAL; |
| 581 | } else { |
| 582 | event->time.tick = snd_seq_timer_get_cur_tick(q->timer); |
| 583 | event->flags |= SNDRV_SEQ_TIME_STAMP_TICK; |
| 584 | } |
| 585 | queuefree(q); |
| 586 | return 1; |
| 587 | } |
| 588 | |
| 589 | |
| 590 | /* |
| 591 | * deliver an event to the specified destination. |
| 592 | * if filter is non-zero, client filter bitmap is tested. |
| 593 | * |
| 594 | * RETURN VALUE: 0 : if succeeded |
| 595 | * <0 : error |
| 596 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 597 | static int snd_seq_deliver_single_event(struct snd_seq_client *client, |
| 598 | struct snd_seq_event *event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | int filter, int atomic, int hop) |
| 600 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 601 | struct snd_seq_client *dest = NULL; |
| 602 | struct snd_seq_client_port *dest_port = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | int result = -ENOENT; |
| 604 | int direct; |
| 605 | |
| 606 | direct = snd_seq_ev_is_direct(event); |
| 607 | |
| 608 | dest = get_event_dest_client(event, filter); |
| 609 | if (dest == NULL) |
| 610 | goto __skip; |
| 611 | dest_port = snd_seq_port_use_ptr(dest, event->dest.port); |
| 612 | if (dest_port == NULL) |
| 613 | goto __skip; |
| 614 | |
| 615 | /* check permission */ |
| 616 | if (! check_port_perm(dest_port, SNDRV_SEQ_PORT_CAP_WRITE)) { |
| 617 | result = -EPERM; |
| 618 | goto __skip; |
| 619 | } |
| 620 | |
| 621 | if (dest_port->timestamping) |
| 622 | update_timestamp_of_queue(event, dest_port->time_queue, |
| 623 | dest_port->time_real); |
| 624 | |
| 625 | switch (dest->type) { |
| 626 | case USER_CLIENT: |
| 627 | if (dest->data.user.fifo) |
| 628 | result = snd_seq_fifo_event_in(dest->data.user.fifo, event); |
| 629 | break; |
| 630 | |
| 631 | case KERNEL_CLIENT: |
| 632 | if (dest_port->event_input == NULL) |
| 633 | break; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 634 | result = dest_port->event_input(event, direct, |
| 635 | dest_port->private_data, |
| 636 | atomic, hop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | break; |
| 638 | default: |
| 639 | break; |
| 640 | } |
| 641 | |
| 642 | __skip: |
| 643 | if (dest_port) |
| 644 | snd_seq_port_unlock(dest_port); |
| 645 | if (dest) |
| 646 | snd_seq_client_unlock(dest); |
| 647 | |
| 648 | if (result < 0 && !direct) { |
| 649 | result = bounce_error_event(client, event, result, atomic, hop); |
| 650 | } |
| 651 | return result; |
| 652 | } |
| 653 | |
| 654 | |
| 655 | /* |
| 656 | * send the event to all subscribers: |
| 657 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 658 | static int deliver_to_subscribers(struct snd_seq_client *client, |
| 659 | struct snd_seq_event *event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | int atomic, int hop) |
| 661 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 662 | struct snd_seq_subscribers *subs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | int err = 0, num_ev = 0; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 664 | struct snd_seq_event event_saved; |
| 665 | struct snd_seq_client_port *src_port; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 666 | struct snd_seq_port_subs_info *grp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | |
| 668 | src_port = snd_seq_port_use_ptr(client, event->source.port); |
| 669 | if (src_port == NULL) |
| 670 | return -EINVAL; /* invalid source port */ |
| 671 | /* save original event record */ |
| 672 | event_saved = *event; |
| 673 | grp = &src_port->c_src; |
| 674 | |
| 675 | /* lock list */ |
| 676 | if (atomic) |
| 677 | read_lock(&grp->list_lock); |
| 678 | else |
| 679 | down_read(&grp->list_mutex); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 680 | list_for_each_entry(subs, &grp->list_head, src_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | event->dest = subs->info.dest; |
| 682 | if (subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP) |
| 683 | /* convert time according to flag with subscription */ |
| 684 | update_timestamp_of_queue(event, subs->info.queue, |
| 685 | subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL); |
| 686 | err = snd_seq_deliver_single_event(client, event, |
| 687 | 0, atomic, hop); |
| 688 | if (err < 0) |
| 689 | break; |
| 690 | num_ev++; |
| 691 | /* restore original event record */ |
| 692 | *event = event_saved; |
| 693 | } |
| 694 | if (atomic) |
| 695 | read_unlock(&grp->list_lock); |
| 696 | else |
| 697 | up_read(&grp->list_mutex); |
| 698 | *event = event_saved; /* restore */ |
| 699 | snd_seq_port_unlock(src_port); |
| 700 | return (err < 0) ? err : num_ev; |
| 701 | } |
| 702 | |
| 703 | |
| 704 | #ifdef SUPPORT_BROADCAST |
| 705 | /* |
| 706 | * broadcast to all ports: |
| 707 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 708 | static int port_broadcast_event(struct snd_seq_client *client, |
| 709 | struct snd_seq_event *event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | int atomic, int hop) |
| 711 | { |
| 712 | int num_ev = 0, err = 0; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 713 | struct snd_seq_client *dest_client; |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 714 | struct snd_seq_client_port *port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | |
| 716 | dest_client = get_event_dest_client(event, SNDRV_SEQ_FILTER_BROADCAST); |
| 717 | if (dest_client == NULL) |
| 718 | return 0; /* no matching destination */ |
| 719 | |
| 720 | read_lock(&dest_client->ports_lock); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 721 | list_for_each_entry(port, &dest_client->ports_list_head, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | event->dest.port = port->addr.port; |
| 723 | /* pass NULL as source client to avoid error bounce */ |
| 724 | err = snd_seq_deliver_single_event(NULL, event, |
| 725 | SNDRV_SEQ_FILTER_BROADCAST, |
| 726 | atomic, hop); |
| 727 | if (err < 0) |
| 728 | break; |
| 729 | num_ev++; |
| 730 | } |
| 731 | read_unlock(&dest_client->ports_lock); |
| 732 | snd_seq_client_unlock(dest_client); |
| 733 | event->dest.port = SNDRV_SEQ_ADDRESS_BROADCAST; /* restore */ |
| 734 | return (err < 0) ? err : num_ev; |
| 735 | } |
| 736 | |
| 737 | /* |
| 738 | * send the event to all clients: |
| 739 | * if destination port is also ADDRESS_BROADCAST, deliver to all ports. |
| 740 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 741 | static int broadcast_event(struct snd_seq_client *client, |
| 742 | struct snd_seq_event *event, int atomic, int hop) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | { |
| 744 | int err = 0, num_ev = 0; |
| 745 | int dest; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 746 | struct snd_seq_addr addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | |
| 748 | addr = event->dest; /* save */ |
| 749 | |
| 750 | for (dest = 0; dest < SNDRV_SEQ_MAX_CLIENTS; dest++) { |
| 751 | /* don't send to itself */ |
| 752 | if (dest == client->number) |
| 753 | continue; |
| 754 | event->dest.client = dest; |
| 755 | event->dest.port = addr.port; |
| 756 | if (addr.port == SNDRV_SEQ_ADDRESS_BROADCAST) |
| 757 | err = port_broadcast_event(client, event, atomic, hop); |
| 758 | else |
| 759 | /* pass NULL as source client to avoid error bounce */ |
| 760 | err = snd_seq_deliver_single_event(NULL, event, |
| 761 | SNDRV_SEQ_FILTER_BROADCAST, |
| 762 | atomic, hop); |
| 763 | if (err < 0) |
| 764 | break; |
| 765 | num_ev += err; |
| 766 | } |
| 767 | event->dest = addr; /* restore */ |
| 768 | return (err < 0) ? err : num_ev; |
| 769 | } |
| 770 | |
| 771 | |
| 772 | /* multicast - not supported yet */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 773 | static int multicast_event(struct snd_seq_client *client, struct snd_seq_event *event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | int atomic, int hop) |
| 775 | { |
| 776 | snd_printd("seq: multicast not supported yet.\n"); |
| 777 | return 0; /* ignored */ |
| 778 | } |
| 779 | #endif /* SUPPORT_BROADCAST */ |
| 780 | |
| 781 | |
| 782 | /* deliver an event to the destination port(s). |
| 783 | * if the event is to subscribers or broadcast, the event is dispatched |
| 784 | * to multiple targets. |
| 785 | * |
| 786 | * RETURN VALUE: n > 0 : the number of delivered events. |
| 787 | * n == 0 : the event was not passed to any client. |
| 788 | * n < 0 : error - event was not processed. |
| 789 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 790 | static int snd_seq_deliver_event(struct snd_seq_client *client, struct snd_seq_event *event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | int atomic, int hop) |
| 792 | { |
| 793 | int result; |
| 794 | |
| 795 | hop++; |
| 796 | if (hop >= SNDRV_SEQ_MAX_HOPS) { |
| 797 | snd_printd("too long delivery path (%d:%d->%d:%d)\n", |
| 798 | event->source.client, event->source.port, |
| 799 | event->dest.client, event->dest.port); |
| 800 | return -EMLINK; |
| 801 | } |
| 802 | |
| 803 | if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS || |
| 804 | event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) |
| 805 | result = deliver_to_subscribers(client, event, atomic, hop); |
| 806 | #ifdef SUPPORT_BROADCAST |
| 807 | else if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST || |
| 808 | event->dest.client == SNDRV_SEQ_ADDRESS_BROADCAST) |
| 809 | result = broadcast_event(client, event, atomic, hop); |
| 810 | else if (event->dest.client >= SNDRV_SEQ_MAX_CLIENTS) |
| 811 | result = multicast_event(client, event, atomic, hop); |
| 812 | else if (event->dest.port == SNDRV_SEQ_ADDRESS_BROADCAST) |
| 813 | result = port_broadcast_event(client, event, atomic, hop); |
| 814 | #endif |
| 815 | else |
| 816 | result = snd_seq_deliver_single_event(client, event, 0, atomic, hop); |
| 817 | |
| 818 | return result; |
| 819 | } |
| 820 | |
| 821 | /* |
| 822 | * dispatch an event cell: |
| 823 | * This function is called only from queue check routines in timer |
| 824 | * interrupts or after enqueued. |
| 825 | * The event cell shall be released or re-queued in this function. |
| 826 | * |
| 827 | * RETURN VALUE: n > 0 : the number of delivered events. |
| 828 | * n == 0 : the event was not passed to any client. |
| 829 | * n < 0 : error - event was not processed. |
| 830 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 831 | int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 833 | struct snd_seq_client *client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | int result; |
| 835 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 836 | if (snd_BUG_ON(!cell)) |
| 837 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | |
| 839 | client = snd_seq_client_use_ptr(cell->event.source.client); |
| 840 | if (client == NULL) { |
| 841 | snd_seq_cell_free(cell); /* release this cell */ |
| 842 | return -EINVAL; |
| 843 | } |
| 844 | |
| 845 | if (cell->event.type == SNDRV_SEQ_EVENT_NOTE) { |
| 846 | /* NOTE event: |
| 847 | * the event cell is re-used as a NOTE-OFF event and |
| 848 | * enqueued again. |
| 849 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 850 | struct snd_seq_event tmpev, *ev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | |
| 852 | /* reserve this event to enqueue note-off later */ |
| 853 | tmpev = cell->event; |
| 854 | tmpev.type = SNDRV_SEQ_EVENT_NOTEON; |
| 855 | result = snd_seq_deliver_event(client, &tmpev, atomic, hop); |
| 856 | |
| 857 | /* |
| 858 | * This was originally a note event. We now re-use the |
| 859 | * cell for the note-off event. |
| 860 | */ |
| 861 | |
| 862 | ev = &cell->event; |
| 863 | ev->type = SNDRV_SEQ_EVENT_NOTEOFF; |
| 864 | ev->flags |= SNDRV_SEQ_PRIORITY_HIGH; |
| 865 | |
| 866 | /* add the duration time */ |
| 867 | switch (ev->flags & SNDRV_SEQ_TIME_STAMP_MASK) { |
| 868 | case SNDRV_SEQ_TIME_STAMP_TICK: |
| 869 | ev->time.tick += ev->data.note.duration; |
| 870 | break; |
| 871 | case SNDRV_SEQ_TIME_STAMP_REAL: |
| 872 | /* unit for duration is ms */ |
| 873 | ev->time.time.tv_nsec += 1000000 * (ev->data.note.duration % 1000); |
| 874 | ev->time.time.tv_sec += ev->data.note.duration / 1000 + |
| 875 | ev->time.time.tv_nsec / 1000000000; |
| 876 | ev->time.time.tv_nsec %= 1000000000; |
| 877 | break; |
| 878 | } |
| 879 | ev->data.note.velocity = ev->data.note.off_velocity; |
| 880 | |
| 881 | /* Now queue this cell as the note off event */ |
| 882 | if (snd_seq_enqueue_event(cell, atomic, hop) < 0) |
| 883 | snd_seq_cell_free(cell); /* release this cell */ |
| 884 | |
| 885 | } else { |
| 886 | /* Normal events: |
| 887 | * event cell is freed after processing the event |
| 888 | */ |
| 889 | |
| 890 | result = snd_seq_deliver_event(client, &cell->event, atomic, hop); |
| 891 | snd_seq_cell_free(cell); |
| 892 | } |
| 893 | |
| 894 | snd_seq_client_unlock(client); |
| 895 | return result; |
| 896 | } |
| 897 | |
| 898 | |
| 899 | /* Allocate a cell from client pool and enqueue it to queue: |
| 900 | * if pool is empty and blocking is TRUE, sleep until a new cell is |
| 901 | * available. |
| 902 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 903 | static int snd_seq_client_enqueue_event(struct snd_seq_client *client, |
| 904 | struct snd_seq_event *event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | struct file *file, int blocking, |
| 906 | int atomic, int hop) |
| 907 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 908 | struct snd_seq_event_cell *cell; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | int err; |
| 910 | |
| 911 | /* special queue values - force direct passing */ |
| 912 | if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) { |
| 913 | event->dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS; |
| 914 | event->queue = SNDRV_SEQ_QUEUE_DIRECT; |
| 915 | } else |
| 916 | #ifdef SUPPORT_BROADCAST |
| 917 | if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST) { |
| 918 | event->dest.client = SNDRV_SEQ_ADDRESS_BROADCAST; |
| 919 | event->queue = SNDRV_SEQ_QUEUE_DIRECT; |
| 920 | } |
| 921 | #endif |
| 922 | if (event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) { |
| 923 | /* check presence of source port */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 924 | struct snd_seq_client_port *src_port = snd_seq_port_use_ptr(client, event->source.port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | if (src_port == NULL) |
| 926 | return -EINVAL; |
| 927 | snd_seq_port_unlock(src_port); |
| 928 | } |
| 929 | |
| 930 | /* direct event processing without enqueued */ |
| 931 | if (snd_seq_ev_is_direct(event)) { |
| 932 | if (event->type == SNDRV_SEQ_EVENT_NOTE) |
| 933 | return -EINVAL; /* this event must be enqueued! */ |
| 934 | return snd_seq_deliver_event(client, event, atomic, hop); |
| 935 | } |
| 936 | |
| 937 | /* Not direct, normal queuing */ |
| 938 | if (snd_seq_queue_is_used(event->queue, client->number) <= 0) |
| 939 | return -EINVAL; /* invalid queue */ |
| 940 | if (! snd_seq_write_pool_allocated(client)) |
| 941 | return -ENXIO; /* queue is not allocated */ |
| 942 | |
| 943 | /* allocate an event cell */ |
| 944 | err = snd_seq_event_dup(client->pool, event, &cell, !blocking || atomic, file); |
| 945 | if (err < 0) |
| 946 | return err; |
| 947 | |
| 948 | /* we got a cell. enqueue it. */ |
| 949 | if ((err = snd_seq_enqueue_event(cell, atomic, hop)) < 0) { |
| 950 | snd_seq_cell_free(cell); |
| 951 | return err; |
| 952 | } |
| 953 | |
| 954 | return 0; |
| 955 | } |
| 956 | |
| 957 | |
| 958 | /* |
| 959 | * check validity of event type and data length. |
| 960 | * return non-zero if invalid. |
| 961 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 962 | static int check_event_type_and_length(struct snd_seq_event *ev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | { |
| 964 | switch (snd_seq_ev_length_type(ev)) { |
| 965 | case SNDRV_SEQ_EVENT_LENGTH_FIXED: |
| 966 | if (snd_seq_ev_is_variable_type(ev)) |
| 967 | return -EINVAL; |
| 968 | break; |
| 969 | case SNDRV_SEQ_EVENT_LENGTH_VARIABLE: |
| 970 | if (! snd_seq_ev_is_variable_type(ev) || |
| 971 | (ev->data.ext.len & ~SNDRV_SEQ_EXT_MASK) >= SNDRV_SEQ_MAX_EVENT_LEN) |
| 972 | return -EINVAL; |
| 973 | break; |
| 974 | case SNDRV_SEQ_EVENT_LENGTH_VARUSR: |
Takashi Iwai | e5723b4 | 2007-10-30 12:17:17 +0100 | [diff] [blame] | 975 | if (! snd_seq_ev_is_direct(ev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | return -EINVAL; |
| 977 | break; |
| 978 | } |
| 979 | return 0; |
| 980 | } |
| 981 | |
| 982 | |
| 983 | /* handle write() */ |
| 984 | /* possible error values: |
| 985 | * -ENXIO invalid client or file open mode |
| 986 | * -ENOMEM malloc failed |
| 987 | * -EFAULT seg. fault during copy from user space |
| 988 | * -EINVAL invalid event |
| 989 | * -EAGAIN no space in output pool |
| 990 | * -EINTR interrupts while sleep |
| 991 | * -EMLINK too many hops |
| 992 | * others depends on return value from driver callback |
| 993 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 994 | static ssize_t snd_seq_write(struct file *file, const char __user *buf, |
| 995 | size_t count, loff_t *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 997 | struct snd_seq_client *client = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | int written = 0, len; |
| 999 | int err = -EINVAL; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1000 | struct snd_seq_event event; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | |
| 1002 | if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT)) |
| 1003 | return -ENXIO; |
| 1004 | |
| 1005 | /* check client structures are in place */ |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1006 | if (snd_BUG_ON(!client)) |
| 1007 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | |
| 1009 | if (!client->accept_output || client->pool == NULL) |
| 1010 | return -ENXIO; |
| 1011 | |
| 1012 | /* allocate the pool now if the pool is not allocated yet */ |
| 1013 | if (client->pool->size > 0 && !snd_seq_write_pool_allocated(client)) { |
| 1014 | if (snd_seq_pool_init(client->pool) < 0) |
| 1015 | return -ENOMEM; |
| 1016 | } |
| 1017 | |
| 1018 | /* only process whole events */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1019 | while (count >= sizeof(struct snd_seq_event)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | /* Read in the event header from the user */ |
| 1021 | len = sizeof(event); |
| 1022 | if (copy_from_user(&event, buf, len)) { |
| 1023 | err = -EFAULT; |
| 1024 | break; |
| 1025 | } |
| 1026 | event.source.client = client->number; /* fill in client number */ |
| 1027 | /* Check for extension data length */ |
| 1028 | if (check_event_type_and_length(&event)) { |
| 1029 | err = -EINVAL; |
| 1030 | break; |
| 1031 | } |
| 1032 | |
| 1033 | /* check for special events */ |
| 1034 | if (event.type == SNDRV_SEQ_EVENT_NONE) |
| 1035 | goto __skip_event; |
| 1036 | else if (snd_seq_ev_is_reserved(&event)) { |
| 1037 | err = -EINVAL; |
| 1038 | break; |
| 1039 | } |
| 1040 | |
| 1041 | if (snd_seq_ev_is_variable(&event)) { |
| 1042 | int extlen = event.data.ext.len & ~SNDRV_SEQ_EXT_MASK; |
| 1043 | if ((size_t)(extlen + len) > count) { |
| 1044 | /* back out, will get an error this time or next */ |
| 1045 | err = -EINVAL; |
| 1046 | break; |
| 1047 | } |
| 1048 | /* set user space pointer */ |
| 1049 | event.data.ext.len = extlen | SNDRV_SEQ_EXT_USRPTR; |
Clemens Ladisch | 4d23359 | 2005-09-05 10:35:20 +0200 | [diff] [blame] | 1050 | event.data.ext.ptr = (char __force *)buf |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1051 | + sizeof(struct snd_seq_event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | len += extlen; /* increment data length */ |
| 1053 | } else { |
| 1054 | #ifdef CONFIG_COMPAT |
| 1055 | if (client->convert32 && snd_seq_ev_is_varusr(&event)) { |
Clemens Ladisch | fea952e | 2011-02-14 11:00:47 +0100 | [diff] [blame] | 1056 | void *ptr = (void __force *)compat_ptr(event.data.raw32.d[1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | event.data.ext.ptr = ptr; |
| 1058 | } |
| 1059 | #endif |
| 1060 | } |
| 1061 | |
| 1062 | /* ok, enqueue it */ |
| 1063 | err = snd_seq_client_enqueue_event(client, &event, file, |
| 1064 | !(file->f_flags & O_NONBLOCK), |
| 1065 | 0, 0); |
| 1066 | if (err < 0) |
| 1067 | break; |
| 1068 | |
| 1069 | __skip_event: |
| 1070 | /* Update pointers and counts */ |
| 1071 | count -= len; |
| 1072 | buf += len; |
| 1073 | written += len; |
| 1074 | } |
| 1075 | |
| 1076 | return written ? written : err; |
| 1077 | } |
| 1078 | |
| 1079 | |
| 1080 | /* |
| 1081 | * handle polling |
| 1082 | */ |
| 1083 | static unsigned int snd_seq_poll(struct file *file, poll_table * wait) |
| 1084 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1085 | struct snd_seq_client *client = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | unsigned int mask = 0; |
| 1087 | |
| 1088 | /* check client structures are in place */ |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1089 | if (snd_BUG_ON(!client)) |
| 1090 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | |
| 1092 | if ((snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT) && |
| 1093 | client->data.user.fifo) { |
| 1094 | |
| 1095 | /* check if data is available in the outqueue */ |
| 1096 | if (snd_seq_fifo_poll_wait(client->data.user.fifo, file, wait)) |
| 1097 | mask |= POLLIN | POLLRDNORM; |
| 1098 | } |
| 1099 | |
| 1100 | if (snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT) { |
| 1101 | |
| 1102 | /* check if data is available in the pool */ |
| 1103 | if (!snd_seq_write_pool_allocated(client) || |
| 1104 | snd_seq_pool_poll_wait(client->pool, file, wait)) |
| 1105 | mask |= POLLOUT | POLLWRNORM; |
| 1106 | } |
| 1107 | |
| 1108 | return mask; |
| 1109 | } |
| 1110 | |
| 1111 | |
| 1112 | /*-----------------------------------------------------*/ |
| 1113 | |
| 1114 | |
| 1115 | /* SYSTEM_INFO ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1116 | static int snd_seq_ioctl_system_info(struct snd_seq_client *client, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1118 | struct snd_seq_system_info info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | |
| 1120 | memset(&info, 0, sizeof(info)); |
| 1121 | /* fill the info fields */ |
| 1122 | info.queues = SNDRV_SEQ_MAX_QUEUES; |
| 1123 | info.clients = SNDRV_SEQ_MAX_CLIENTS; |
| 1124 | info.ports = 256; /* fixed limit */ |
| 1125 | info.channels = 256; /* fixed limit */ |
| 1126 | info.cur_clients = client_usage.cur; |
| 1127 | info.cur_queues = snd_seq_queue_get_cur_queues(); |
| 1128 | |
| 1129 | if (copy_to_user(arg, &info, sizeof(info))) |
| 1130 | return -EFAULT; |
| 1131 | return 0; |
| 1132 | } |
| 1133 | |
| 1134 | |
| 1135 | /* RUNNING_MODE ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1136 | static int snd_seq_ioctl_running_mode(struct snd_seq_client *client, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1138 | struct snd_seq_running_info info; |
| 1139 | struct snd_seq_client *cptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | int err = 0; |
| 1141 | |
| 1142 | if (copy_from_user(&info, arg, sizeof(info))) |
| 1143 | return -EFAULT; |
| 1144 | |
| 1145 | /* requested client number */ |
| 1146 | cptr = snd_seq_client_use_ptr(info.client); |
| 1147 | if (cptr == NULL) |
| 1148 | return -ENOENT; /* don't change !!! */ |
| 1149 | |
| 1150 | #ifdef SNDRV_BIG_ENDIAN |
| 1151 | if (! info.big_endian) { |
| 1152 | err = -EINVAL; |
| 1153 | goto __err; |
| 1154 | } |
| 1155 | #else |
| 1156 | if (info.big_endian) { |
| 1157 | err = -EINVAL; |
| 1158 | goto __err; |
| 1159 | } |
| 1160 | |
| 1161 | #endif |
| 1162 | if (info.cpu_mode > sizeof(long)) { |
| 1163 | err = -EINVAL; |
| 1164 | goto __err; |
| 1165 | } |
| 1166 | cptr->convert32 = (info.cpu_mode < sizeof(long)); |
| 1167 | __err: |
| 1168 | snd_seq_client_unlock(cptr); |
| 1169 | return err; |
| 1170 | } |
| 1171 | |
| 1172 | /* CLIENT_INFO ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1173 | static void get_client_info(struct snd_seq_client *cptr, |
| 1174 | struct snd_seq_client_info *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | { |
| 1176 | info->client = cptr->number; |
| 1177 | |
| 1178 | /* fill the info fields */ |
| 1179 | info->type = cptr->type; |
| 1180 | strcpy(info->name, cptr->name); |
| 1181 | info->filter = cptr->filter; |
| 1182 | info->event_lost = cptr->event_lost; |
| 1183 | memcpy(info->event_filter, cptr->event_filter, 32); |
| 1184 | info->num_ports = cptr->num_ports; |
| 1185 | memset(info->reserved, 0, sizeof(info->reserved)); |
| 1186 | } |
| 1187 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1188 | static int snd_seq_ioctl_get_client_info(struct snd_seq_client *client, |
| 1189 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1191 | struct snd_seq_client *cptr; |
| 1192 | struct snd_seq_client_info client_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | |
| 1194 | if (copy_from_user(&client_info, arg, sizeof(client_info))) |
| 1195 | return -EFAULT; |
| 1196 | |
| 1197 | /* requested client number */ |
| 1198 | cptr = snd_seq_client_use_ptr(client_info.client); |
| 1199 | if (cptr == NULL) |
| 1200 | return -ENOENT; /* don't change !!! */ |
| 1201 | |
| 1202 | get_client_info(cptr, &client_info); |
| 1203 | snd_seq_client_unlock(cptr); |
| 1204 | |
| 1205 | if (copy_to_user(arg, &client_info, sizeof(client_info))) |
| 1206 | return -EFAULT; |
| 1207 | return 0; |
| 1208 | } |
| 1209 | |
| 1210 | |
| 1211 | /* CLIENT_INFO ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1212 | static int snd_seq_ioctl_set_client_info(struct snd_seq_client *client, |
| 1213 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1215 | struct snd_seq_client_info client_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | |
| 1217 | if (copy_from_user(&client_info, arg, sizeof(client_info))) |
| 1218 | return -EFAULT; |
| 1219 | |
| 1220 | /* it is not allowed to set the info fields for an another client */ |
| 1221 | if (client->number != client_info.client) |
| 1222 | return -EPERM; |
| 1223 | /* also client type must be set now */ |
| 1224 | if (client->type != client_info.type) |
| 1225 | return -EINVAL; |
| 1226 | |
| 1227 | /* fill the info fields */ |
| 1228 | if (client_info.name[0]) |
| 1229 | strlcpy(client->name, client_info.name, sizeof(client->name)); |
| 1230 | |
| 1231 | client->filter = client_info.filter; |
| 1232 | client->event_lost = client_info.event_lost; |
| 1233 | memcpy(client->event_filter, client_info.event_filter, 32); |
| 1234 | |
| 1235 | return 0; |
| 1236 | } |
| 1237 | |
| 1238 | |
| 1239 | /* |
| 1240 | * CREATE PORT ioctl() |
| 1241 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1242 | static int snd_seq_ioctl_create_port(struct snd_seq_client *client, |
| 1243 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1245 | struct snd_seq_client_port *port; |
| 1246 | struct snd_seq_port_info info; |
| 1247 | struct snd_seq_port_callback *callback; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | |
| 1249 | if (copy_from_user(&info, arg, sizeof(info))) |
| 1250 | return -EFAULT; |
| 1251 | |
| 1252 | /* it is not allowed to create the port for an another client */ |
| 1253 | if (info.addr.client != client->number) |
| 1254 | return -EPERM; |
| 1255 | |
| 1256 | port = snd_seq_create_port(client, (info.flags & SNDRV_SEQ_PORT_FLG_GIVEN_PORT) ? info.addr.port : -1); |
| 1257 | if (port == NULL) |
| 1258 | return -ENOMEM; |
| 1259 | |
| 1260 | if (client->type == USER_CLIENT && info.kernel) { |
| 1261 | snd_seq_delete_port(client, port->addr.port); |
| 1262 | return -EINVAL; |
| 1263 | } |
| 1264 | if (client->type == KERNEL_CLIENT) { |
| 1265 | if ((callback = info.kernel) != NULL) { |
| 1266 | if (callback->owner) |
| 1267 | port->owner = callback->owner; |
| 1268 | port->private_data = callback->private_data; |
| 1269 | port->private_free = callback->private_free; |
| 1270 | port->callback_all = callback->callback_all; |
| 1271 | port->event_input = callback->event_input; |
| 1272 | port->c_src.open = callback->subscribe; |
| 1273 | port->c_src.close = callback->unsubscribe; |
| 1274 | port->c_dest.open = callback->use; |
| 1275 | port->c_dest.close = callback->unuse; |
| 1276 | } |
| 1277 | } |
| 1278 | |
| 1279 | info.addr = port->addr; |
| 1280 | |
| 1281 | snd_seq_set_port_info(port, &info); |
| 1282 | snd_seq_system_client_ev_port_start(port->addr.client, port->addr.port); |
| 1283 | |
| 1284 | if (copy_to_user(arg, &info, sizeof(info))) |
| 1285 | return -EFAULT; |
| 1286 | |
| 1287 | return 0; |
| 1288 | } |
| 1289 | |
| 1290 | /* |
| 1291 | * DELETE PORT ioctl() |
| 1292 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1293 | static int snd_seq_ioctl_delete_port(struct snd_seq_client *client, |
| 1294 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1296 | struct snd_seq_port_info info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | int err; |
| 1298 | |
| 1299 | /* set passed parameters */ |
| 1300 | if (copy_from_user(&info, arg, sizeof(info))) |
| 1301 | return -EFAULT; |
| 1302 | |
| 1303 | /* it is not allowed to remove the port for an another client */ |
| 1304 | if (info.addr.client != client->number) |
| 1305 | return -EPERM; |
| 1306 | |
| 1307 | err = snd_seq_delete_port(client, info.addr.port); |
| 1308 | if (err >= 0) |
| 1309 | snd_seq_system_client_ev_port_exit(client->number, info.addr.port); |
| 1310 | return err; |
| 1311 | } |
| 1312 | |
| 1313 | |
| 1314 | /* |
| 1315 | * GET_PORT_INFO ioctl() (on any client) |
| 1316 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1317 | static int snd_seq_ioctl_get_port_info(struct snd_seq_client *client, |
| 1318 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1320 | struct snd_seq_client *cptr; |
| 1321 | struct snd_seq_client_port *port; |
| 1322 | struct snd_seq_port_info info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | |
| 1324 | if (copy_from_user(&info, arg, sizeof(info))) |
| 1325 | return -EFAULT; |
| 1326 | cptr = snd_seq_client_use_ptr(info.addr.client); |
| 1327 | if (cptr == NULL) |
| 1328 | return -ENXIO; |
| 1329 | |
| 1330 | port = snd_seq_port_use_ptr(cptr, info.addr.port); |
| 1331 | if (port == NULL) { |
| 1332 | snd_seq_client_unlock(cptr); |
| 1333 | return -ENOENT; /* don't change */ |
| 1334 | } |
| 1335 | |
| 1336 | /* get port info */ |
| 1337 | snd_seq_get_port_info(port, &info); |
| 1338 | snd_seq_port_unlock(port); |
| 1339 | snd_seq_client_unlock(cptr); |
| 1340 | |
| 1341 | if (copy_to_user(arg, &info, sizeof(info))) |
| 1342 | return -EFAULT; |
| 1343 | return 0; |
| 1344 | } |
| 1345 | |
| 1346 | |
| 1347 | /* |
| 1348 | * SET_PORT_INFO ioctl() (only ports on this/own client) |
| 1349 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1350 | static int snd_seq_ioctl_set_port_info(struct snd_seq_client *client, |
| 1351 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1353 | struct snd_seq_client_port *port; |
| 1354 | struct snd_seq_port_info info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | |
| 1356 | if (copy_from_user(&info, arg, sizeof(info))) |
| 1357 | return -EFAULT; |
| 1358 | |
| 1359 | if (info.addr.client != client->number) /* only set our own ports ! */ |
| 1360 | return -EPERM; |
| 1361 | port = snd_seq_port_use_ptr(client, info.addr.port); |
| 1362 | if (port) { |
| 1363 | snd_seq_set_port_info(port, &info); |
| 1364 | snd_seq_port_unlock(port); |
| 1365 | } |
| 1366 | return 0; |
| 1367 | } |
| 1368 | |
| 1369 | |
| 1370 | /* |
| 1371 | * port subscription (connection) |
| 1372 | */ |
| 1373 | #define PERM_RD (SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ) |
| 1374 | #define PERM_WR (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_SUBS_WRITE) |
| 1375 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1376 | static int check_subscription_permission(struct snd_seq_client *client, |
| 1377 | struct snd_seq_client_port *sport, |
| 1378 | struct snd_seq_client_port *dport, |
| 1379 | struct snd_seq_port_subscribe *subs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | { |
| 1381 | if (client->number != subs->sender.client && |
| 1382 | client->number != subs->dest.client) { |
| 1383 | /* connection by third client - check export permission */ |
| 1384 | if (check_port_perm(sport, SNDRV_SEQ_PORT_CAP_NO_EXPORT)) |
| 1385 | return -EPERM; |
| 1386 | if (check_port_perm(dport, SNDRV_SEQ_PORT_CAP_NO_EXPORT)) |
| 1387 | return -EPERM; |
| 1388 | } |
| 1389 | |
| 1390 | /* check read permission */ |
| 1391 | /* if sender or receiver is the subscribing client itself, |
| 1392 | * no permission check is necessary |
| 1393 | */ |
| 1394 | if (client->number != subs->sender.client) { |
| 1395 | if (! check_port_perm(sport, PERM_RD)) |
| 1396 | return -EPERM; |
| 1397 | } |
| 1398 | /* check write permission */ |
| 1399 | if (client->number != subs->dest.client) { |
| 1400 | if (! check_port_perm(dport, PERM_WR)) |
| 1401 | return -EPERM; |
| 1402 | } |
| 1403 | return 0; |
| 1404 | } |
| 1405 | |
| 1406 | /* |
| 1407 | * send an subscription notify event to user client: |
| 1408 | * client must be user client. |
| 1409 | */ |
| 1410 | int snd_seq_client_notify_subscription(int client, int port, |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1411 | struct snd_seq_port_subscribe *info, |
| 1412 | int evtype) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1414 | struct snd_seq_event event; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1415 | |
| 1416 | memset(&event, 0, sizeof(event)); |
| 1417 | event.type = evtype; |
| 1418 | event.data.connect.dest = info->dest; |
| 1419 | event.data.connect.sender = info->sender; |
| 1420 | |
| 1421 | return snd_seq_system_notify(client, port, &event); /* non-atomic */ |
| 1422 | } |
| 1423 | |
| 1424 | |
| 1425 | /* |
| 1426 | * add to port's subscription list IOCTL interface |
| 1427 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1428 | static int snd_seq_ioctl_subscribe_port(struct snd_seq_client *client, |
| 1429 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1430 | { |
| 1431 | int result = -EINVAL; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1432 | struct snd_seq_client *receiver = NULL, *sender = NULL; |
| 1433 | struct snd_seq_client_port *sport = NULL, *dport = NULL; |
| 1434 | struct snd_seq_port_subscribe subs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | |
| 1436 | if (copy_from_user(&subs, arg, sizeof(subs))) |
| 1437 | return -EFAULT; |
| 1438 | |
| 1439 | if ((receiver = snd_seq_client_use_ptr(subs.dest.client)) == NULL) |
| 1440 | goto __end; |
| 1441 | if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL) |
| 1442 | goto __end; |
| 1443 | if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL) |
| 1444 | goto __end; |
| 1445 | if ((dport = snd_seq_port_use_ptr(receiver, subs.dest.port)) == NULL) |
| 1446 | goto __end; |
| 1447 | |
| 1448 | result = check_subscription_permission(client, sport, dport, &subs); |
| 1449 | if (result < 0) |
| 1450 | goto __end; |
| 1451 | |
| 1452 | /* connect them */ |
| 1453 | result = snd_seq_port_connect(client, sender, sport, receiver, dport, &subs); |
| 1454 | if (! result) /* broadcast announce */ |
| 1455 | snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0, |
| 1456 | &subs, SNDRV_SEQ_EVENT_PORT_SUBSCRIBED); |
| 1457 | __end: |
| 1458 | if (sport) |
| 1459 | snd_seq_port_unlock(sport); |
| 1460 | if (dport) |
| 1461 | snd_seq_port_unlock(dport); |
| 1462 | if (sender) |
| 1463 | snd_seq_client_unlock(sender); |
| 1464 | if (receiver) |
| 1465 | snd_seq_client_unlock(receiver); |
| 1466 | return result; |
| 1467 | } |
| 1468 | |
| 1469 | |
| 1470 | /* |
| 1471 | * remove from port's subscription list |
| 1472 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1473 | static int snd_seq_ioctl_unsubscribe_port(struct snd_seq_client *client, |
| 1474 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1475 | { |
| 1476 | int result = -ENXIO; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1477 | struct snd_seq_client *receiver = NULL, *sender = NULL; |
| 1478 | struct snd_seq_client_port *sport = NULL, *dport = NULL; |
| 1479 | struct snd_seq_port_subscribe subs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1480 | |
| 1481 | if (copy_from_user(&subs, arg, sizeof(subs))) |
| 1482 | return -EFAULT; |
| 1483 | |
| 1484 | if ((receiver = snd_seq_client_use_ptr(subs.dest.client)) == NULL) |
| 1485 | goto __end; |
| 1486 | if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL) |
| 1487 | goto __end; |
| 1488 | if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL) |
| 1489 | goto __end; |
| 1490 | if ((dport = snd_seq_port_use_ptr(receiver, subs.dest.port)) == NULL) |
| 1491 | goto __end; |
| 1492 | |
| 1493 | result = check_subscription_permission(client, sport, dport, &subs); |
| 1494 | if (result < 0) |
| 1495 | goto __end; |
| 1496 | |
| 1497 | result = snd_seq_port_disconnect(client, sender, sport, receiver, dport, &subs); |
| 1498 | if (! result) /* broadcast announce */ |
| 1499 | snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0, |
| 1500 | &subs, SNDRV_SEQ_EVENT_PORT_UNSUBSCRIBED); |
| 1501 | __end: |
| 1502 | if (sport) |
| 1503 | snd_seq_port_unlock(sport); |
| 1504 | if (dport) |
| 1505 | snd_seq_port_unlock(dport); |
| 1506 | if (sender) |
| 1507 | snd_seq_client_unlock(sender); |
| 1508 | if (receiver) |
| 1509 | snd_seq_client_unlock(receiver); |
| 1510 | return result; |
| 1511 | } |
| 1512 | |
| 1513 | |
| 1514 | /* CREATE_QUEUE ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1515 | static int snd_seq_ioctl_create_queue(struct snd_seq_client *client, |
| 1516 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1518 | struct snd_seq_queue_info info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | int result; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1520 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | |
| 1522 | if (copy_from_user(&info, arg, sizeof(info))) |
| 1523 | return -EFAULT; |
| 1524 | |
| 1525 | result = snd_seq_queue_alloc(client->number, info.locked, info.flags); |
| 1526 | if (result < 0) |
| 1527 | return result; |
| 1528 | |
| 1529 | q = queueptr(result); |
| 1530 | if (q == NULL) |
| 1531 | return -EINVAL; |
| 1532 | |
| 1533 | info.queue = q->queue; |
| 1534 | info.locked = q->locked; |
| 1535 | info.owner = q->owner; |
| 1536 | |
| 1537 | /* set queue name */ |
| 1538 | if (! info.name[0]) |
| 1539 | snprintf(info.name, sizeof(info.name), "Queue-%d", q->queue); |
| 1540 | strlcpy(q->name, info.name, sizeof(q->name)); |
| 1541 | queuefree(q); |
| 1542 | |
| 1543 | if (copy_to_user(arg, &info, sizeof(info))) |
| 1544 | return -EFAULT; |
| 1545 | |
| 1546 | return 0; |
| 1547 | } |
| 1548 | |
| 1549 | /* DELETE_QUEUE ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1550 | static int snd_seq_ioctl_delete_queue(struct snd_seq_client *client, |
| 1551 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1553 | struct snd_seq_queue_info info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1554 | |
| 1555 | if (copy_from_user(&info, arg, sizeof(info))) |
| 1556 | return -EFAULT; |
| 1557 | |
| 1558 | return snd_seq_queue_delete(client->number, info.queue); |
| 1559 | } |
| 1560 | |
| 1561 | /* GET_QUEUE_INFO ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1562 | static int snd_seq_ioctl_get_queue_info(struct snd_seq_client *client, |
| 1563 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1565 | struct snd_seq_queue_info info; |
| 1566 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | |
| 1568 | if (copy_from_user(&info, arg, sizeof(info))) |
| 1569 | return -EFAULT; |
| 1570 | |
| 1571 | q = queueptr(info.queue); |
| 1572 | if (q == NULL) |
| 1573 | return -EINVAL; |
| 1574 | |
| 1575 | memset(&info, 0, sizeof(info)); |
| 1576 | info.queue = q->queue; |
| 1577 | info.owner = q->owner; |
| 1578 | info.locked = q->locked; |
| 1579 | strlcpy(info.name, q->name, sizeof(info.name)); |
| 1580 | queuefree(q); |
| 1581 | |
| 1582 | if (copy_to_user(arg, &info, sizeof(info))) |
| 1583 | return -EFAULT; |
| 1584 | |
| 1585 | return 0; |
| 1586 | } |
| 1587 | |
| 1588 | /* SET_QUEUE_INFO ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1589 | static int snd_seq_ioctl_set_queue_info(struct snd_seq_client *client, |
| 1590 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1591 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1592 | struct snd_seq_queue_info info; |
| 1593 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | |
| 1595 | if (copy_from_user(&info, arg, sizeof(info))) |
| 1596 | return -EFAULT; |
| 1597 | |
| 1598 | if (info.owner != client->number) |
| 1599 | return -EINVAL; |
| 1600 | |
| 1601 | /* change owner/locked permission */ |
| 1602 | if (snd_seq_queue_check_access(info.queue, client->number)) { |
| 1603 | if (snd_seq_queue_set_owner(info.queue, client->number, info.locked) < 0) |
| 1604 | return -EPERM; |
| 1605 | if (info.locked) |
| 1606 | snd_seq_queue_use(info.queue, client->number, 1); |
| 1607 | } else { |
| 1608 | return -EPERM; |
| 1609 | } |
| 1610 | |
| 1611 | q = queueptr(info.queue); |
| 1612 | if (! q) |
| 1613 | return -EINVAL; |
| 1614 | if (q->owner != client->number) { |
| 1615 | queuefree(q); |
| 1616 | return -EPERM; |
| 1617 | } |
| 1618 | strlcpy(q->name, info.name, sizeof(q->name)); |
| 1619 | queuefree(q); |
| 1620 | |
| 1621 | return 0; |
| 1622 | } |
| 1623 | |
| 1624 | /* GET_NAMED_QUEUE ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1625 | static int snd_seq_ioctl_get_named_queue(struct snd_seq_client *client, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1626 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1627 | struct snd_seq_queue_info info; |
| 1628 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1629 | |
| 1630 | if (copy_from_user(&info, arg, sizeof(info))) |
| 1631 | return -EFAULT; |
| 1632 | |
| 1633 | q = snd_seq_queue_find_name(info.name); |
| 1634 | if (q == NULL) |
| 1635 | return -EINVAL; |
| 1636 | info.queue = q->queue; |
| 1637 | info.owner = q->owner; |
| 1638 | info.locked = q->locked; |
| 1639 | queuefree(q); |
| 1640 | |
| 1641 | if (copy_to_user(arg, &info, sizeof(info))) |
| 1642 | return -EFAULT; |
| 1643 | |
| 1644 | return 0; |
| 1645 | } |
| 1646 | |
| 1647 | /* GET_QUEUE_STATUS ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1648 | static int snd_seq_ioctl_get_queue_status(struct snd_seq_client *client, |
| 1649 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1651 | struct snd_seq_queue_status status; |
| 1652 | struct snd_seq_queue *queue; |
| 1653 | struct snd_seq_timer *tmr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | |
| 1655 | if (copy_from_user(&status, arg, sizeof(status))) |
| 1656 | return -EFAULT; |
| 1657 | |
| 1658 | queue = queueptr(status.queue); |
| 1659 | if (queue == NULL) |
| 1660 | return -EINVAL; |
| 1661 | memset(&status, 0, sizeof(status)); |
| 1662 | status.queue = queue->queue; |
| 1663 | |
| 1664 | tmr = queue->timer; |
| 1665 | status.events = queue->tickq->cells + queue->timeq->cells; |
| 1666 | |
| 1667 | status.time = snd_seq_timer_get_cur_time(tmr); |
| 1668 | status.tick = snd_seq_timer_get_cur_tick(tmr); |
| 1669 | |
| 1670 | status.running = tmr->running; |
| 1671 | |
| 1672 | status.flags = queue->flags; |
| 1673 | queuefree(queue); |
| 1674 | |
| 1675 | if (copy_to_user(arg, &status, sizeof(status))) |
| 1676 | return -EFAULT; |
| 1677 | return 0; |
| 1678 | } |
| 1679 | |
| 1680 | |
| 1681 | /* GET_QUEUE_TEMPO ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1682 | static int snd_seq_ioctl_get_queue_tempo(struct snd_seq_client *client, |
| 1683 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1684 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1685 | struct snd_seq_queue_tempo tempo; |
| 1686 | struct snd_seq_queue *queue; |
| 1687 | struct snd_seq_timer *tmr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1688 | |
| 1689 | if (copy_from_user(&tempo, arg, sizeof(tempo))) |
| 1690 | return -EFAULT; |
| 1691 | |
| 1692 | queue = queueptr(tempo.queue); |
| 1693 | if (queue == NULL) |
| 1694 | return -EINVAL; |
| 1695 | memset(&tempo, 0, sizeof(tempo)); |
| 1696 | tempo.queue = queue->queue; |
| 1697 | |
| 1698 | tmr = queue->timer; |
| 1699 | |
| 1700 | tempo.tempo = tmr->tempo; |
| 1701 | tempo.ppq = tmr->ppq; |
| 1702 | tempo.skew_value = tmr->skew; |
| 1703 | tempo.skew_base = tmr->skew_base; |
| 1704 | queuefree(queue); |
| 1705 | |
| 1706 | if (copy_to_user(arg, &tempo, sizeof(tempo))) |
| 1707 | return -EFAULT; |
| 1708 | return 0; |
| 1709 | } |
| 1710 | |
| 1711 | |
| 1712 | /* SET_QUEUE_TEMPO ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1713 | int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1714 | { |
| 1715 | if (!snd_seq_queue_check_access(tempo->queue, client)) |
| 1716 | return -EPERM; |
| 1717 | return snd_seq_queue_timer_set_tempo(tempo->queue, client, tempo); |
| 1718 | } |
| 1719 | |
Takashi Iwai | 91715ed | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 1720 | EXPORT_SYMBOL(snd_seq_set_queue_tempo); |
| 1721 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1722 | static int snd_seq_ioctl_set_queue_tempo(struct snd_seq_client *client, |
| 1723 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1724 | { |
| 1725 | int result; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1726 | struct snd_seq_queue_tempo tempo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1727 | |
| 1728 | if (copy_from_user(&tempo, arg, sizeof(tempo))) |
| 1729 | return -EFAULT; |
| 1730 | |
| 1731 | result = snd_seq_set_queue_tempo(client->number, &tempo); |
| 1732 | return result < 0 ? result : 0; |
| 1733 | } |
| 1734 | |
| 1735 | |
| 1736 | /* GET_QUEUE_TIMER ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1737 | static int snd_seq_ioctl_get_queue_timer(struct snd_seq_client *client, |
| 1738 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1739 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1740 | struct snd_seq_queue_timer timer; |
| 1741 | struct snd_seq_queue *queue; |
| 1742 | struct snd_seq_timer *tmr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1743 | |
| 1744 | if (copy_from_user(&timer, arg, sizeof(timer))) |
| 1745 | return -EFAULT; |
| 1746 | |
| 1747 | queue = queueptr(timer.queue); |
| 1748 | if (queue == NULL) |
| 1749 | return -EINVAL; |
| 1750 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1751 | if (mutex_lock_interruptible(&queue->timer_mutex)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | queuefree(queue); |
| 1753 | return -ERESTARTSYS; |
| 1754 | } |
| 1755 | tmr = queue->timer; |
| 1756 | memset(&timer, 0, sizeof(timer)); |
| 1757 | timer.queue = queue->queue; |
| 1758 | |
| 1759 | timer.type = tmr->type; |
| 1760 | if (tmr->type == SNDRV_SEQ_TIMER_ALSA) { |
| 1761 | timer.u.alsa.id = tmr->alsa_id; |
| 1762 | timer.u.alsa.resolution = tmr->preferred_resolution; |
| 1763 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1764 | mutex_unlock(&queue->timer_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1765 | queuefree(queue); |
| 1766 | |
| 1767 | if (copy_to_user(arg, &timer, sizeof(timer))) |
| 1768 | return -EFAULT; |
| 1769 | return 0; |
| 1770 | } |
| 1771 | |
| 1772 | |
| 1773 | /* SET_QUEUE_TIMER ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1774 | static int snd_seq_ioctl_set_queue_timer(struct snd_seq_client *client, |
| 1775 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1776 | { |
| 1777 | int result = 0; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1778 | struct snd_seq_queue_timer timer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1779 | |
| 1780 | if (copy_from_user(&timer, arg, sizeof(timer))) |
| 1781 | return -EFAULT; |
| 1782 | |
| 1783 | if (timer.type != SNDRV_SEQ_TIMER_ALSA) |
| 1784 | return -EINVAL; |
| 1785 | |
| 1786 | if (snd_seq_queue_check_access(timer.queue, client->number)) { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1787 | struct snd_seq_queue *q; |
| 1788 | struct snd_seq_timer *tmr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | |
| 1790 | q = queueptr(timer.queue); |
| 1791 | if (q == NULL) |
| 1792 | return -ENXIO; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1793 | if (mutex_lock_interruptible(&q->timer_mutex)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1794 | queuefree(q); |
| 1795 | return -ERESTARTSYS; |
| 1796 | } |
| 1797 | tmr = q->timer; |
| 1798 | snd_seq_queue_timer_close(timer.queue); |
| 1799 | tmr->type = timer.type; |
| 1800 | if (tmr->type == SNDRV_SEQ_TIMER_ALSA) { |
| 1801 | tmr->alsa_id = timer.u.alsa.id; |
| 1802 | tmr->preferred_resolution = timer.u.alsa.resolution; |
| 1803 | } |
| 1804 | result = snd_seq_queue_timer_open(timer.queue); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1805 | mutex_unlock(&q->timer_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1806 | queuefree(q); |
| 1807 | } else { |
| 1808 | return -EPERM; |
| 1809 | } |
| 1810 | |
| 1811 | return result; |
| 1812 | } |
| 1813 | |
| 1814 | |
| 1815 | /* GET_QUEUE_CLIENT ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1816 | static int snd_seq_ioctl_get_queue_client(struct snd_seq_client *client, |
| 1817 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1818 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1819 | struct snd_seq_queue_client info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1820 | int used; |
| 1821 | |
| 1822 | if (copy_from_user(&info, arg, sizeof(info))) |
| 1823 | return -EFAULT; |
| 1824 | |
| 1825 | used = snd_seq_queue_is_used(info.queue, client->number); |
| 1826 | if (used < 0) |
| 1827 | return -EINVAL; |
| 1828 | info.used = used; |
| 1829 | info.client = client->number; |
| 1830 | |
| 1831 | if (copy_to_user(arg, &info, sizeof(info))) |
| 1832 | return -EFAULT; |
| 1833 | return 0; |
| 1834 | } |
| 1835 | |
| 1836 | |
| 1837 | /* SET_QUEUE_CLIENT ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1838 | static int snd_seq_ioctl_set_queue_client(struct snd_seq_client *client, |
| 1839 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1840 | { |
| 1841 | int err; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1842 | struct snd_seq_queue_client info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1843 | |
| 1844 | if (copy_from_user(&info, arg, sizeof(info))) |
| 1845 | return -EFAULT; |
| 1846 | |
| 1847 | if (info.used >= 0) { |
| 1848 | err = snd_seq_queue_use(info.queue, client->number, info.used); |
| 1849 | if (err < 0) |
| 1850 | return err; |
| 1851 | } |
| 1852 | |
| 1853 | return snd_seq_ioctl_get_queue_client(client, arg); |
| 1854 | } |
| 1855 | |
| 1856 | |
| 1857 | /* GET_CLIENT_POOL ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1858 | static int snd_seq_ioctl_get_client_pool(struct snd_seq_client *client, |
| 1859 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1860 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1861 | struct snd_seq_client_pool info; |
| 1862 | struct snd_seq_client *cptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | |
| 1864 | if (copy_from_user(&info, arg, sizeof(info))) |
| 1865 | return -EFAULT; |
| 1866 | |
| 1867 | cptr = snd_seq_client_use_ptr(info.client); |
| 1868 | if (cptr == NULL) |
| 1869 | return -ENOENT; |
| 1870 | memset(&info, 0, sizeof(info)); |
| 1871 | info.output_pool = cptr->pool->size; |
| 1872 | info.output_room = cptr->pool->room; |
| 1873 | info.output_free = info.output_pool; |
Eugene Teo | e64d2e3 | 2006-03-17 16:32:17 +0100 | [diff] [blame] | 1874 | info.output_free = snd_seq_unused_cells(cptr->pool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1875 | if (cptr->type == USER_CLIENT) { |
| 1876 | info.input_pool = cptr->data.user.fifo_pool_size; |
| 1877 | info.input_free = info.input_pool; |
| 1878 | if (cptr->data.user.fifo) |
| 1879 | info.input_free = snd_seq_unused_cells(cptr->data.user.fifo->pool); |
| 1880 | } else { |
| 1881 | info.input_pool = 0; |
| 1882 | info.input_free = 0; |
| 1883 | } |
| 1884 | snd_seq_client_unlock(cptr); |
| 1885 | |
| 1886 | if (copy_to_user(arg, &info, sizeof(info))) |
| 1887 | return -EFAULT; |
| 1888 | return 0; |
| 1889 | } |
| 1890 | |
| 1891 | /* SET_CLIENT_POOL ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1892 | static int snd_seq_ioctl_set_client_pool(struct snd_seq_client *client, |
| 1893 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1894 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1895 | struct snd_seq_client_pool info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1896 | int rc; |
| 1897 | |
| 1898 | if (copy_from_user(&info, arg, sizeof(info))) |
| 1899 | return -EFAULT; |
| 1900 | |
| 1901 | if (client->number != info.client) |
| 1902 | return -EINVAL; /* can't change other clients */ |
| 1903 | |
| 1904 | if (info.output_pool >= 1 && info.output_pool <= SNDRV_SEQ_MAX_EVENTS && |
| 1905 | (! snd_seq_write_pool_allocated(client) || |
| 1906 | info.output_pool != client->pool->size)) { |
| 1907 | if (snd_seq_write_pool_allocated(client)) { |
| 1908 | /* remove all existing cells */ |
| 1909 | snd_seq_queue_client_leave_cells(client->number); |
| 1910 | snd_seq_pool_done(client->pool); |
| 1911 | } |
| 1912 | client->pool->size = info.output_pool; |
| 1913 | rc = snd_seq_pool_init(client->pool); |
| 1914 | if (rc < 0) |
| 1915 | return rc; |
| 1916 | } |
| 1917 | if (client->type == USER_CLIENT && client->data.user.fifo != NULL && |
| 1918 | info.input_pool >= 1 && |
| 1919 | info.input_pool <= SNDRV_SEQ_MAX_CLIENT_EVENTS && |
| 1920 | info.input_pool != client->data.user.fifo_pool_size) { |
| 1921 | /* change pool size */ |
| 1922 | rc = snd_seq_fifo_resize(client->data.user.fifo, info.input_pool); |
| 1923 | if (rc < 0) |
| 1924 | return rc; |
| 1925 | client->data.user.fifo_pool_size = info.input_pool; |
| 1926 | } |
| 1927 | if (info.output_room >= 1 && |
| 1928 | info.output_room <= client->pool->size) { |
| 1929 | client->pool->room = info.output_room; |
| 1930 | } |
| 1931 | |
| 1932 | return snd_seq_ioctl_get_client_pool(client, arg); |
| 1933 | } |
| 1934 | |
| 1935 | |
| 1936 | /* REMOVE_EVENTS ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1937 | static int snd_seq_ioctl_remove_events(struct snd_seq_client *client, |
| 1938 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1939 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1940 | struct snd_seq_remove_events info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1941 | |
| 1942 | if (copy_from_user(&info, arg, sizeof(info))) |
| 1943 | return -EFAULT; |
| 1944 | |
| 1945 | /* |
| 1946 | * Input mostly not implemented XXX. |
| 1947 | */ |
| 1948 | if (info.remove_mode & SNDRV_SEQ_REMOVE_INPUT) { |
| 1949 | /* |
| 1950 | * No restrictions so for a user client we can clear |
| 1951 | * the whole fifo |
| 1952 | */ |
| 1953 | if (client->type == USER_CLIENT) |
| 1954 | snd_seq_fifo_clear(client->data.user.fifo); |
| 1955 | } |
| 1956 | |
| 1957 | if (info.remove_mode & SNDRV_SEQ_REMOVE_OUTPUT) |
| 1958 | snd_seq_queue_remove_cells(client->number, &info); |
| 1959 | |
| 1960 | return 0; |
| 1961 | } |
| 1962 | |
| 1963 | |
| 1964 | /* |
| 1965 | * get subscription info |
| 1966 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1967 | static int snd_seq_ioctl_get_subscription(struct snd_seq_client *client, |
| 1968 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1969 | { |
| 1970 | int result; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1971 | struct snd_seq_client *sender = NULL; |
| 1972 | struct snd_seq_client_port *sport = NULL; |
| 1973 | struct snd_seq_port_subscribe subs; |
| 1974 | struct snd_seq_subscribers *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1975 | |
| 1976 | if (copy_from_user(&subs, arg, sizeof(subs))) |
| 1977 | return -EFAULT; |
| 1978 | |
| 1979 | result = -EINVAL; |
| 1980 | if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL) |
| 1981 | goto __end; |
| 1982 | if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL) |
| 1983 | goto __end; |
| 1984 | p = snd_seq_port_get_subscription(&sport->c_src, &subs.dest); |
| 1985 | if (p) { |
| 1986 | result = 0; |
| 1987 | subs = p->info; |
| 1988 | } else |
| 1989 | result = -ENOENT; |
| 1990 | |
| 1991 | __end: |
| 1992 | if (sport) |
| 1993 | snd_seq_port_unlock(sport); |
| 1994 | if (sender) |
| 1995 | snd_seq_client_unlock(sender); |
| 1996 | if (result >= 0) { |
| 1997 | if (copy_to_user(arg, &subs, sizeof(subs))) |
| 1998 | return -EFAULT; |
| 1999 | } |
| 2000 | return result; |
| 2001 | } |
| 2002 | |
| 2003 | |
| 2004 | /* |
| 2005 | * get subscription info - check only its presence |
| 2006 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2007 | static int snd_seq_ioctl_query_subs(struct snd_seq_client *client, |
| 2008 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2009 | { |
| 2010 | int result = -ENXIO; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2011 | struct snd_seq_client *cptr = NULL; |
| 2012 | struct snd_seq_client_port *port = NULL; |
| 2013 | struct snd_seq_query_subs subs; |
| 2014 | struct snd_seq_port_subs_info *group; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2015 | struct list_head *p; |
| 2016 | int i; |
| 2017 | |
| 2018 | if (copy_from_user(&subs, arg, sizeof(subs))) |
| 2019 | return -EFAULT; |
| 2020 | |
| 2021 | if ((cptr = snd_seq_client_use_ptr(subs.root.client)) == NULL) |
| 2022 | goto __end; |
| 2023 | if ((port = snd_seq_port_use_ptr(cptr, subs.root.port)) == NULL) |
| 2024 | goto __end; |
| 2025 | |
| 2026 | switch (subs.type) { |
| 2027 | case SNDRV_SEQ_QUERY_SUBS_READ: |
| 2028 | group = &port->c_src; |
| 2029 | break; |
| 2030 | case SNDRV_SEQ_QUERY_SUBS_WRITE: |
| 2031 | group = &port->c_dest; |
| 2032 | break; |
| 2033 | default: |
| 2034 | goto __end; |
| 2035 | } |
| 2036 | |
| 2037 | down_read(&group->list_mutex); |
| 2038 | /* search for the subscriber */ |
| 2039 | subs.num_subs = group->count; |
| 2040 | i = 0; |
| 2041 | result = -ENOENT; |
| 2042 | list_for_each(p, &group->list_head) { |
| 2043 | if (i++ == subs.index) { |
| 2044 | /* found! */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2045 | struct snd_seq_subscribers *s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2046 | if (subs.type == SNDRV_SEQ_QUERY_SUBS_READ) { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2047 | s = list_entry(p, struct snd_seq_subscribers, src_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2048 | subs.addr = s->info.dest; |
| 2049 | } else { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2050 | s = list_entry(p, struct snd_seq_subscribers, dest_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2051 | subs.addr = s->info.sender; |
| 2052 | } |
| 2053 | subs.flags = s->info.flags; |
| 2054 | subs.queue = s->info.queue; |
| 2055 | result = 0; |
| 2056 | break; |
| 2057 | } |
| 2058 | } |
| 2059 | up_read(&group->list_mutex); |
| 2060 | |
| 2061 | __end: |
| 2062 | if (port) |
| 2063 | snd_seq_port_unlock(port); |
| 2064 | if (cptr) |
| 2065 | snd_seq_client_unlock(cptr); |
| 2066 | if (result >= 0) { |
| 2067 | if (copy_to_user(arg, &subs, sizeof(subs))) |
| 2068 | return -EFAULT; |
| 2069 | } |
| 2070 | return result; |
| 2071 | } |
| 2072 | |
| 2073 | |
| 2074 | /* |
| 2075 | * query next client |
| 2076 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2077 | static int snd_seq_ioctl_query_next_client(struct snd_seq_client *client, |
| 2078 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2079 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2080 | struct snd_seq_client *cptr = NULL; |
| 2081 | struct snd_seq_client_info info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2082 | |
| 2083 | if (copy_from_user(&info, arg, sizeof(info))) |
| 2084 | return -EFAULT; |
| 2085 | |
| 2086 | /* search for next client */ |
| 2087 | info.client++; |
| 2088 | if (info.client < 0) |
| 2089 | info.client = 0; |
| 2090 | for (; info.client < SNDRV_SEQ_MAX_CLIENTS; info.client++) { |
| 2091 | cptr = snd_seq_client_use_ptr(info.client); |
| 2092 | if (cptr) |
| 2093 | break; /* found */ |
| 2094 | } |
| 2095 | if (cptr == NULL) |
| 2096 | return -ENOENT; |
| 2097 | |
| 2098 | get_client_info(cptr, &info); |
| 2099 | snd_seq_client_unlock(cptr); |
| 2100 | |
| 2101 | if (copy_to_user(arg, &info, sizeof(info))) |
| 2102 | return -EFAULT; |
| 2103 | return 0; |
| 2104 | } |
| 2105 | |
| 2106 | /* |
| 2107 | * query next port |
| 2108 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2109 | static int snd_seq_ioctl_query_next_port(struct snd_seq_client *client, |
| 2110 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2111 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2112 | struct snd_seq_client *cptr; |
| 2113 | struct snd_seq_client_port *port = NULL; |
| 2114 | struct snd_seq_port_info info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2115 | |
| 2116 | if (copy_from_user(&info, arg, sizeof(info))) |
| 2117 | return -EFAULT; |
| 2118 | cptr = snd_seq_client_use_ptr(info.addr.client); |
| 2119 | if (cptr == NULL) |
| 2120 | return -ENXIO; |
| 2121 | |
| 2122 | /* search for next port */ |
| 2123 | info.addr.port++; |
| 2124 | port = snd_seq_port_query_nearest(cptr, &info); |
| 2125 | if (port == NULL) { |
| 2126 | snd_seq_client_unlock(cptr); |
| 2127 | return -ENOENT; |
| 2128 | } |
| 2129 | |
| 2130 | /* get port info */ |
| 2131 | info.addr = port->addr; |
| 2132 | snd_seq_get_port_info(port, &info); |
| 2133 | snd_seq_port_unlock(port); |
| 2134 | snd_seq_client_unlock(cptr); |
| 2135 | |
| 2136 | if (copy_to_user(arg, &info, sizeof(info))) |
| 2137 | return -EFAULT; |
| 2138 | return 0; |
| 2139 | } |
| 2140 | |
| 2141 | /* -------------------------------------------------------- */ |
| 2142 | |
| 2143 | static struct seq_ioctl_table { |
| 2144 | unsigned int cmd; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2145 | int (*func)(struct snd_seq_client *client, void __user * arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2146 | } ioctl_tables[] = { |
| 2147 | { SNDRV_SEQ_IOCTL_SYSTEM_INFO, snd_seq_ioctl_system_info }, |
| 2148 | { SNDRV_SEQ_IOCTL_RUNNING_MODE, snd_seq_ioctl_running_mode }, |
| 2149 | { SNDRV_SEQ_IOCTL_GET_CLIENT_INFO, snd_seq_ioctl_get_client_info }, |
| 2150 | { SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, snd_seq_ioctl_set_client_info }, |
| 2151 | { SNDRV_SEQ_IOCTL_CREATE_PORT, snd_seq_ioctl_create_port }, |
| 2152 | { SNDRV_SEQ_IOCTL_DELETE_PORT, snd_seq_ioctl_delete_port }, |
| 2153 | { SNDRV_SEQ_IOCTL_GET_PORT_INFO, snd_seq_ioctl_get_port_info }, |
| 2154 | { SNDRV_SEQ_IOCTL_SET_PORT_INFO, snd_seq_ioctl_set_port_info }, |
| 2155 | { SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, snd_seq_ioctl_subscribe_port }, |
| 2156 | { SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, snd_seq_ioctl_unsubscribe_port }, |
| 2157 | { SNDRV_SEQ_IOCTL_CREATE_QUEUE, snd_seq_ioctl_create_queue }, |
| 2158 | { SNDRV_SEQ_IOCTL_DELETE_QUEUE, snd_seq_ioctl_delete_queue }, |
| 2159 | { SNDRV_SEQ_IOCTL_GET_QUEUE_INFO, snd_seq_ioctl_get_queue_info }, |
| 2160 | { SNDRV_SEQ_IOCTL_SET_QUEUE_INFO, snd_seq_ioctl_set_queue_info }, |
| 2161 | { SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE, snd_seq_ioctl_get_named_queue }, |
| 2162 | { SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS, snd_seq_ioctl_get_queue_status }, |
| 2163 | { SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO, snd_seq_ioctl_get_queue_tempo }, |
| 2164 | { SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO, snd_seq_ioctl_set_queue_tempo }, |
| 2165 | { SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER, snd_seq_ioctl_get_queue_timer }, |
| 2166 | { SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER, snd_seq_ioctl_set_queue_timer }, |
| 2167 | { SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT, snd_seq_ioctl_get_queue_client }, |
| 2168 | { SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT, snd_seq_ioctl_set_queue_client }, |
| 2169 | { SNDRV_SEQ_IOCTL_GET_CLIENT_POOL, snd_seq_ioctl_get_client_pool }, |
| 2170 | { SNDRV_SEQ_IOCTL_SET_CLIENT_POOL, snd_seq_ioctl_set_client_pool }, |
| 2171 | { SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION, snd_seq_ioctl_get_subscription }, |
| 2172 | { SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, snd_seq_ioctl_query_next_client }, |
| 2173 | { SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, snd_seq_ioctl_query_next_port }, |
| 2174 | { SNDRV_SEQ_IOCTL_REMOVE_EVENTS, snd_seq_ioctl_remove_events }, |
| 2175 | { SNDRV_SEQ_IOCTL_QUERY_SUBS, snd_seq_ioctl_query_subs }, |
| 2176 | { 0, NULL }, |
| 2177 | }; |
| 2178 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2179 | static int snd_seq_do_ioctl(struct snd_seq_client *client, unsigned int cmd, |
| 2180 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2181 | { |
| 2182 | struct seq_ioctl_table *p; |
| 2183 | |
| 2184 | switch (cmd) { |
| 2185 | case SNDRV_SEQ_IOCTL_PVERSION: |
| 2186 | /* return sequencer version number */ |
| 2187 | return put_user(SNDRV_SEQ_VERSION, (int __user *)arg) ? -EFAULT : 0; |
| 2188 | case SNDRV_SEQ_IOCTL_CLIENT_ID: |
| 2189 | /* return the id of this client */ |
| 2190 | return put_user(client->number, (int __user *)arg) ? -EFAULT : 0; |
| 2191 | } |
| 2192 | |
| 2193 | if (! arg) |
| 2194 | return -EFAULT; |
| 2195 | for (p = ioctl_tables; p->cmd; p++) { |
| 2196 | if (p->cmd == cmd) |
| 2197 | return p->func(client, arg); |
| 2198 | } |
Thadeu Lima de Souza Cascardo | c85a400 | 2010-02-01 16:17:01 -0200 | [diff] [blame] | 2199 | snd_printd("seq unknown ioctl() 0x%x (type='%c', number=0x%02x)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2200 | cmd, _IOC_TYPE(cmd), _IOC_NR(cmd)); |
| 2201 | return -ENOTTY; |
| 2202 | } |
| 2203 | |
| 2204 | |
| 2205 | static long snd_seq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| 2206 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2207 | struct snd_seq_client *client = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2208 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2209 | if (snd_BUG_ON(!client)) |
| 2210 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2211 | |
| 2212 | return snd_seq_do_ioctl(client, cmd, (void __user *) arg); |
| 2213 | } |
| 2214 | |
| 2215 | #ifdef CONFIG_COMPAT |
| 2216 | #include "seq_compat.c" |
| 2217 | #else |
| 2218 | #define snd_seq_ioctl_compat NULL |
| 2219 | #endif |
| 2220 | |
| 2221 | /* -------------------------------------------------------- */ |
| 2222 | |
| 2223 | |
| 2224 | /* exported to kernel modules */ |
Clemens Ladisch | 7b6d924 | 2005-12-12 09:33:37 +0100 | [diff] [blame] | 2225 | int snd_seq_create_kernel_client(struct snd_card *card, int client_index, |
| 2226 | const char *name_fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2227 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2228 | struct snd_seq_client *client; |
Clemens Ladisch | 7b6d924 | 2005-12-12 09:33:37 +0100 | [diff] [blame] | 2229 | va_list args; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2230 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2231 | if (snd_BUG_ON(in_interrupt())) |
| 2232 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2233 | |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 2234 | if (card && client_index >= SNDRV_SEQ_CLIENTS_PER_CARD) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2235 | return -EINVAL; |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 2236 | if (card == NULL && client_index >= SNDRV_SEQ_GLOBAL_CLIENTS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2237 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2238 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2239 | if (mutex_lock_interruptible(®ister_mutex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2240 | return -ERESTARTSYS; |
Clemens Ladisch | d001544 | 2005-11-20 14:09:05 +0100 | [diff] [blame] | 2241 | |
| 2242 | if (card) { |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 2243 | client_index += SNDRV_SEQ_GLOBAL_CLIENTS |
| 2244 | + card->number * SNDRV_SEQ_CLIENTS_PER_CARD; |
| 2245 | if (client_index >= SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN) |
Clemens Ladisch | d001544 | 2005-11-20 14:09:05 +0100 | [diff] [blame] | 2246 | client_index = -1; |
| 2247 | } |
| 2248 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2249 | /* empty write queue as default */ |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 2250 | client = seq_create_client1(client_index, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2251 | if (client == NULL) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2252 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2253 | return -EBUSY; /* failure code */ |
| 2254 | } |
| 2255 | usage_alloc(&client_usage, 1); |
| 2256 | |
Clemens Ladisch | 83e8ad6 | 2005-12-12 09:30:43 +0100 | [diff] [blame] | 2257 | client->accept_input = 1; |
| 2258 | client->accept_output = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2259 | |
Clemens Ladisch | 7b6d924 | 2005-12-12 09:33:37 +0100 | [diff] [blame] | 2260 | va_start(args, name_fmt); |
| 2261 | vsnprintf(client->name, sizeof(client->name), name_fmt, args); |
| 2262 | va_end(args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2263 | |
| 2264 | client->type = KERNEL_CLIENT; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2265 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2266 | |
| 2267 | /* make others aware this new client */ |
| 2268 | snd_seq_system_client_ev_client_start(client->number); |
| 2269 | |
| 2270 | /* return client number to caller */ |
| 2271 | return client->number; |
| 2272 | } |
| 2273 | |
Takashi Iwai | 91715ed | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 2274 | EXPORT_SYMBOL(snd_seq_create_kernel_client); |
| 2275 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2276 | /* exported to kernel modules */ |
| 2277 | int snd_seq_delete_kernel_client(int client) |
| 2278 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2279 | struct snd_seq_client *ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2280 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2281 | if (snd_BUG_ON(in_interrupt())) |
| 2282 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2283 | |
| 2284 | ptr = clientptr(client); |
| 2285 | if (ptr == NULL) |
| 2286 | return -EINVAL; |
| 2287 | |
| 2288 | seq_free_client(ptr); |
| 2289 | kfree(ptr); |
| 2290 | return 0; |
| 2291 | } |
| 2292 | |
Takashi Iwai | 91715ed | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 2293 | EXPORT_SYMBOL(snd_seq_delete_kernel_client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2294 | |
| 2295 | /* skeleton to enqueue event, called from snd_seq_kernel_client_enqueue |
| 2296 | * and snd_seq_kernel_client_enqueue_blocking |
| 2297 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2298 | static int kernel_client_enqueue(int client, struct snd_seq_event *ev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2299 | struct file *file, int blocking, |
| 2300 | int atomic, int hop) |
| 2301 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2302 | struct snd_seq_client *cptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2303 | int result; |
| 2304 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2305 | if (snd_BUG_ON(!ev)) |
| 2306 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2307 | |
| 2308 | if (ev->type == SNDRV_SEQ_EVENT_NONE) |
| 2309 | return 0; /* ignore this */ |
| 2310 | if (ev->type == SNDRV_SEQ_EVENT_KERNEL_ERROR) |
| 2311 | return -EINVAL; /* quoted events can't be enqueued */ |
| 2312 | |
| 2313 | /* fill in client number */ |
| 2314 | ev->source.client = client; |
| 2315 | |
| 2316 | if (check_event_type_and_length(ev)) |
| 2317 | return -EINVAL; |
| 2318 | |
| 2319 | cptr = snd_seq_client_use_ptr(client); |
| 2320 | if (cptr == NULL) |
| 2321 | return -EINVAL; |
| 2322 | |
| 2323 | if (! cptr->accept_output) |
| 2324 | result = -EPERM; |
| 2325 | else /* send it */ |
| 2326 | result = snd_seq_client_enqueue_event(cptr, ev, file, blocking, atomic, hop); |
| 2327 | |
| 2328 | snd_seq_client_unlock(cptr); |
| 2329 | return result; |
| 2330 | } |
| 2331 | |
| 2332 | /* |
| 2333 | * exported, called by kernel clients to enqueue events (w/o blocking) |
| 2334 | * |
| 2335 | * RETURN VALUE: zero if succeed, negative if error |
| 2336 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2337 | int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event * ev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2338 | int atomic, int hop) |
| 2339 | { |
| 2340 | return kernel_client_enqueue(client, ev, NULL, 0, atomic, hop); |
| 2341 | } |
| 2342 | |
Takashi Iwai | 91715ed | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 2343 | EXPORT_SYMBOL(snd_seq_kernel_client_enqueue); |
| 2344 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2345 | /* |
| 2346 | * exported, called by kernel clients to enqueue events (with blocking) |
| 2347 | * |
| 2348 | * RETURN VALUE: zero if succeed, negative if error |
| 2349 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2350 | int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2351 | struct file *file, |
| 2352 | int atomic, int hop) |
| 2353 | { |
| 2354 | return kernel_client_enqueue(client, ev, file, 1, atomic, hop); |
| 2355 | } |
| 2356 | |
Takashi Iwai | 91715ed | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 2357 | EXPORT_SYMBOL(snd_seq_kernel_client_enqueue_blocking); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2358 | |
| 2359 | /* |
| 2360 | * exported, called by kernel clients to dispatch events directly to other |
| 2361 | * clients, bypassing the queues. Event time-stamp will be updated. |
| 2362 | * |
| 2363 | * RETURN VALUE: negative = delivery failed, |
| 2364 | * zero, or positive: the number of delivered events |
| 2365 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2366 | int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event * ev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2367 | int atomic, int hop) |
| 2368 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2369 | struct snd_seq_client *cptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2370 | int result; |
| 2371 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2372 | if (snd_BUG_ON(!ev)) |
| 2373 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2374 | |
| 2375 | /* fill in client number */ |
| 2376 | ev->queue = SNDRV_SEQ_QUEUE_DIRECT; |
| 2377 | ev->source.client = client; |
| 2378 | |
| 2379 | if (check_event_type_and_length(ev)) |
| 2380 | return -EINVAL; |
| 2381 | |
| 2382 | cptr = snd_seq_client_use_ptr(client); |
| 2383 | if (cptr == NULL) |
| 2384 | return -EINVAL; |
| 2385 | |
| 2386 | if (!cptr->accept_output) |
| 2387 | result = -EPERM; |
| 2388 | else |
| 2389 | result = snd_seq_deliver_event(cptr, ev, atomic, hop); |
| 2390 | |
| 2391 | snd_seq_client_unlock(cptr); |
| 2392 | return result; |
| 2393 | } |
| 2394 | |
Takashi Iwai | 91715ed | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 2395 | EXPORT_SYMBOL(snd_seq_kernel_client_dispatch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2396 | |
| 2397 | /* |
| 2398 | * exported, called by kernel clients to perform same functions as with |
| 2399 | * userland ioctl() |
| 2400 | */ |
| 2401 | int snd_seq_kernel_client_ctl(int clientid, unsigned int cmd, void *arg) |
| 2402 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2403 | struct snd_seq_client *client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2404 | mm_segment_t fs; |
| 2405 | int result; |
| 2406 | |
| 2407 | client = clientptr(clientid); |
| 2408 | if (client == NULL) |
| 2409 | return -ENXIO; |
| 2410 | fs = snd_enter_user(); |
Clemens Ladisch | fea952e | 2011-02-14 11:00:47 +0100 | [diff] [blame] | 2411 | result = snd_seq_do_ioctl(client, cmd, (void __force __user *)arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2412 | snd_leave_user(fs); |
| 2413 | return result; |
| 2414 | } |
| 2415 | |
Takashi Iwai | 91715ed | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 2416 | EXPORT_SYMBOL(snd_seq_kernel_client_ctl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2417 | |
| 2418 | /* exported (for OSS emulator) */ |
| 2419 | int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait) |
| 2420 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2421 | struct snd_seq_client *client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2422 | |
| 2423 | client = clientptr(clientid); |
| 2424 | if (client == NULL) |
| 2425 | return -ENXIO; |
| 2426 | |
| 2427 | if (! snd_seq_write_pool_allocated(client)) |
| 2428 | return 1; |
| 2429 | if (snd_seq_pool_poll_wait(client->pool, file, wait)) |
| 2430 | return 1; |
| 2431 | return 0; |
| 2432 | } |
| 2433 | |
Takashi Iwai | 91715ed | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 2434 | EXPORT_SYMBOL(snd_seq_kernel_client_write_poll); |
| 2435 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2436 | /*---------------------------------------------------------------------------*/ |
| 2437 | |
Takashi Iwai | 04f141a | 2005-12-01 10:43:51 +0100 | [diff] [blame] | 2438 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2439 | /* |
| 2440 | * /proc interface |
| 2441 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2442 | static void snd_seq_info_dump_subscribers(struct snd_info_buffer *buffer, |
| 2443 | struct snd_seq_port_subs_info *group, |
| 2444 | int is_src, char *msg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2445 | { |
| 2446 | struct list_head *p; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2447 | struct snd_seq_subscribers *s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2448 | int count = 0; |
| 2449 | |
| 2450 | down_read(&group->list_mutex); |
| 2451 | if (list_empty(&group->list_head)) { |
| 2452 | up_read(&group->list_mutex); |
| 2453 | return; |
| 2454 | } |
| 2455 | snd_iprintf(buffer, msg); |
| 2456 | list_for_each(p, &group->list_head) { |
| 2457 | if (is_src) |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2458 | s = list_entry(p, struct snd_seq_subscribers, src_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2459 | else |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2460 | s = list_entry(p, struct snd_seq_subscribers, dest_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2461 | if (count++) |
| 2462 | snd_iprintf(buffer, ", "); |
| 2463 | snd_iprintf(buffer, "%d:%d", |
| 2464 | is_src ? s->info.dest.client : s->info.sender.client, |
| 2465 | is_src ? s->info.dest.port : s->info.sender.port); |
| 2466 | if (s->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP) |
| 2467 | snd_iprintf(buffer, "[%c:%d]", ((s->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL) ? 'r' : 't'), s->info.queue); |
| 2468 | if (group->exclusive) |
| 2469 | snd_iprintf(buffer, "[ex]"); |
| 2470 | } |
| 2471 | up_read(&group->list_mutex); |
| 2472 | snd_iprintf(buffer, "\n"); |
| 2473 | } |
| 2474 | |
| 2475 | #define FLAG_PERM_RD(perm) ((perm) & SNDRV_SEQ_PORT_CAP_READ ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_READ ? 'R' : 'r') : '-') |
| 2476 | #define FLAG_PERM_WR(perm) ((perm) & SNDRV_SEQ_PORT_CAP_WRITE ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_WRITE ? 'W' : 'w') : '-') |
| 2477 | #define FLAG_PERM_EX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_NO_EXPORT ? '-' : 'e') |
| 2478 | |
| 2479 | #define FLAG_PERM_DUPLEX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_DUPLEX ? 'X' : '-') |
| 2480 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2481 | static void snd_seq_info_dump_ports(struct snd_info_buffer *buffer, |
| 2482 | struct snd_seq_client *client) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2483 | { |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 2484 | struct snd_seq_client_port *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2485 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2486 | mutex_lock(&client->ports_mutex); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 2487 | list_for_each_entry(p, &client->ports_list_head, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2488 | snd_iprintf(buffer, " Port %3d : \"%s\" (%c%c%c%c)\n", |
| 2489 | p->addr.port, p->name, |
| 2490 | FLAG_PERM_RD(p->capability), |
| 2491 | FLAG_PERM_WR(p->capability), |
| 2492 | FLAG_PERM_EX(p->capability), |
| 2493 | FLAG_PERM_DUPLEX(p->capability)); |
| 2494 | snd_seq_info_dump_subscribers(buffer, &p->c_src, 1, " Connecting To: "); |
| 2495 | snd_seq_info_dump_subscribers(buffer, &p->c_dest, 0, " Connected From: "); |
| 2496 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2497 | mutex_unlock(&client->ports_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2498 | } |
| 2499 | |
| 2500 | |
| 2501 | /* exported to seq_info.c */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2502 | void snd_seq_info_clients_read(struct snd_info_entry *entry, |
| 2503 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2504 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2505 | int c; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2506 | struct snd_seq_client *client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2507 | |
| 2508 | snd_iprintf(buffer, "Client info\n"); |
| 2509 | snd_iprintf(buffer, " cur clients : %d\n", client_usage.cur); |
| 2510 | snd_iprintf(buffer, " peak clients : %d\n", client_usage.peak); |
| 2511 | snd_iprintf(buffer, " max clients : %d\n", SNDRV_SEQ_MAX_CLIENTS); |
| 2512 | snd_iprintf(buffer, "\n"); |
| 2513 | |
| 2514 | /* list the client table */ |
| 2515 | for (c = 0; c < SNDRV_SEQ_MAX_CLIENTS; c++) { |
| 2516 | client = snd_seq_client_use_ptr(c); |
| 2517 | if (client == NULL) |
| 2518 | continue; |
| 2519 | if (client->type == NO_CLIENT) { |
| 2520 | snd_seq_client_unlock(client); |
| 2521 | continue; |
| 2522 | } |
| 2523 | |
| 2524 | snd_iprintf(buffer, "Client %3d : \"%s\" [%s]\n", |
| 2525 | c, client->name, |
| 2526 | client->type == USER_CLIENT ? "User" : "Kernel"); |
| 2527 | snd_seq_info_dump_ports(buffer, client); |
| 2528 | if (snd_seq_write_pool_allocated(client)) { |
| 2529 | snd_iprintf(buffer, " Output pool :\n"); |
| 2530 | snd_seq_info_pool(buffer, client->pool, " "); |
| 2531 | } |
| 2532 | if (client->type == USER_CLIENT && client->data.user.fifo && |
| 2533 | client->data.user.fifo->pool) { |
| 2534 | snd_iprintf(buffer, " Input pool :\n"); |
| 2535 | snd_seq_info_pool(buffer, client->data.user.fifo->pool, " "); |
| 2536 | } |
| 2537 | snd_seq_client_unlock(client); |
| 2538 | } |
| 2539 | } |
Takashi Iwai | 04f141a | 2005-12-01 10:43:51 +0100 | [diff] [blame] | 2540 | #endif /* CONFIG_PROC_FS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2541 | |
| 2542 | /*---------------------------------------------------------------------------*/ |
| 2543 | |
| 2544 | |
| 2545 | /* |
| 2546 | * REGISTRATION PART |
| 2547 | */ |
| 2548 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 2549 | static const struct file_operations snd_seq_f_ops = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2550 | { |
| 2551 | .owner = THIS_MODULE, |
| 2552 | .read = snd_seq_read, |
| 2553 | .write = snd_seq_write, |
| 2554 | .open = snd_seq_open, |
| 2555 | .release = snd_seq_release, |
Takashi Iwai | 02f4865 | 2010-04-13 11:49:04 +0200 | [diff] [blame] | 2556 | .llseek = no_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2557 | .poll = snd_seq_poll, |
| 2558 | .unlocked_ioctl = snd_seq_ioctl, |
| 2559 | .compat_ioctl = snd_seq_ioctl_compat, |
| 2560 | }; |
| 2561 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2562 | /* |
| 2563 | * register sequencer device |
| 2564 | */ |
| 2565 | int __init snd_sequencer_device_init(void) |
| 2566 | { |
| 2567 | int err; |
| 2568 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2569 | if (mutex_lock_interruptible(®ister_mutex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2570 | return -ERESTARTSYS; |
| 2571 | |
Clemens Ladisch | 2af677f | 2005-11-20 14:03:48 +0100 | [diff] [blame] | 2572 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0, |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 2573 | &snd_seq_f_ops, NULL, "seq")) < 0) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2574 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2575 | return err; |
| 2576 | } |
| 2577 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2578 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2579 | |
| 2580 | return 0; |
| 2581 | } |
| 2582 | |
| 2583 | |
| 2584 | |
| 2585 | /* |
| 2586 | * unregister sequencer device |
| 2587 | */ |
| 2588 | void __exit snd_sequencer_device_done(void) |
| 2589 | { |
| 2590 | snd_unregister_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0); |
| 2591 | } |