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