| /* |
| * ALSA sequencer Client Manager |
| * Copyright (c) 1998-2001 by Frank van de Pol <fvdpol@coil.demon.nl> |
| * Jaroslav Kysela <perex@suse.cz> |
| * Takashi Iwai <tiwai@suse.de> |
| * |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| */ |
| |
| #include <sound/driver.h> |
| #include <linux/init.h> |
| #include <linux/smp_lock.h> |
| #include <linux/slab.h> |
| #include <sound/core.h> |
| #include <sound/minors.h> |
| #include <linux/kmod.h> |
| |
| #include <sound/seq_kernel.h> |
| #include "seq_clientmgr.h" |
| #include "seq_memory.h" |
| #include "seq_queue.h" |
| #include "seq_timer.h" |
| #include "seq_info.h" |
| #include "seq_system.h" |
| #include <sound/seq_device.h> |
| #ifdef CONFIG_COMPAT |
| #include <linux/compat.h> |
| #endif |
| |
| /* Client Manager |
| |
| * this module handles the connections of userland and kernel clients |
| * |
| */ |
| |
| #define SNDRV_SEQ_LFLG_INPUT 0x0001 |
| #define SNDRV_SEQ_LFLG_OUTPUT 0x0002 |
| #define SNDRV_SEQ_LFLG_OPEN (SNDRV_SEQ_LFLG_INPUT|SNDRV_SEQ_LFLG_OUTPUT) |
| |
| static DEFINE_SPINLOCK(clients_lock); |
| static DECLARE_MUTEX(register_mutex); |
| |
| /* |
| * client table |
| */ |
| static char clienttablock[SNDRV_SEQ_MAX_CLIENTS]; |
| static struct snd_seq_client *clienttab[SNDRV_SEQ_MAX_CLIENTS]; |
| static struct snd_seq_usage client_usage; |
| |
| /* |
| * prototypes |
| */ |
| static int bounce_error_event(struct snd_seq_client *client, |
| struct snd_seq_event *event, |
| int err, int atomic, int hop); |
| static int snd_seq_deliver_single_event(struct snd_seq_client *client, |
| struct snd_seq_event *event, |
| int filter, int atomic, int hop); |
| |
| /* |
| */ |
| |
| static inline mm_segment_t snd_enter_user(void) |
| { |
| mm_segment_t fs = get_fs(); |
| set_fs(get_ds()); |
| return fs; |
| } |
| |
| static inline void snd_leave_user(mm_segment_t fs) |
| { |
| set_fs(fs); |
| } |
| |
| /* |
| */ |
| static inline unsigned short snd_seq_file_flags(struct file *file) |
| { |
| switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { |
| case FMODE_WRITE: |
| return SNDRV_SEQ_LFLG_OUTPUT; |
| case FMODE_READ: |
| return SNDRV_SEQ_LFLG_INPUT; |
| default: |
| return SNDRV_SEQ_LFLG_OPEN; |
| } |
| } |
| |
| static inline int snd_seq_write_pool_allocated(struct snd_seq_client *client) |
| { |
| return snd_seq_total_cells(client->pool) > 0; |
| } |
| |
| /* return pointer to client structure for specified id */ |
| static struct snd_seq_client *clientptr(int clientid) |
| { |
| if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) { |
| snd_printd("Seq: oops. Trying to get pointer to client %d\n", |
| clientid); |
| return NULL; |
| } |
| return clienttab[clientid]; |
| } |
| |
| extern int seq_client_load[]; |
| |
| struct snd_seq_client *snd_seq_client_use_ptr(int clientid) |
| { |
| unsigned long flags; |
| struct snd_seq_client *client; |
| |
| if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) { |
| snd_printd("Seq: oops. Trying to get pointer to client %d\n", |
| clientid); |
| return NULL; |
| } |
| spin_lock_irqsave(&clients_lock, flags); |
| client = clientptr(clientid); |
| if (client) |
| goto __lock; |
| if (clienttablock[clientid]) { |
| spin_unlock_irqrestore(&clients_lock, flags); |
| return NULL; |
| } |
| spin_unlock_irqrestore(&clients_lock, flags); |
| #ifdef CONFIG_KMOD |
| if (!in_interrupt() && current->fs->root) { |
| static char client_requested[64]; |
| static char card_requested[SNDRV_CARDS]; |
| if (clientid < 64) { |
| int idx; |
| |
| if (! client_requested[clientid] && current->fs->root) { |
| client_requested[clientid] = 1; |
| for (idx = 0; idx < 64; idx++) { |
| if (seq_client_load[idx] < 0) |
| break; |
| if (seq_client_load[idx] == clientid) { |
| request_module("snd-seq-client-%i", |
| clientid); |
| break; |
| } |
| } |
| } |
| } else if (clientid >= 64 && clientid < 128) { |
| int card = (clientid - 64) / 8; |
| if (card < snd_ecards_limit) { |
| if (! card_requested[card]) { |
| card_requested[card] = 1; |
| snd_request_card(card); |
| } |
| snd_seq_device_load_drivers(); |
| } |
| } |
| spin_lock_irqsave(&clients_lock, flags); |
| client = clientptr(clientid); |
| if (client) |
| goto __lock; |
| spin_unlock_irqrestore(&clients_lock, flags); |
| } |
| #endif |
| return NULL; |
| |
| __lock: |
| snd_use_lock_use(&client->use_lock); |
| spin_unlock_irqrestore(&clients_lock, flags); |
| return client; |
| } |
| |
| static void usage_alloc(struct snd_seq_usage *res, int num) |
| { |
| res->cur += num; |
| if (res->cur > res->peak) |
| res->peak = res->cur; |
| } |
| |
| static void usage_free(struct snd_seq_usage *res, int num) |
| { |
| res->cur -= num; |
| } |
| |
| /* initialise data structures */ |
| int __init client_init_data(void) |
| { |
| /* zap out the client table */ |
| memset(&clienttablock, 0, sizeof(clienttablock)); |
| memset(&clienttab, 0, sizeof(clienttab)); |
| return 0; |
| } |
| |
| |
| static struct snd_seq_client *seq_create_client1(int client_index, int poolsize) |
| { |
| unsigned long flags; |
| int c; |
| struct snd_seq_client *client; |
| |
| /* init client data */ |
| client = kzalloc(sizeof(*client), GFP_KERNEL); |
| if (client == NULL) |
| return NULL; |
| client->pool = snd_seq_pool_new(poolsize); |
| if (client->pool == NULL) { |
| kfree(client); |
| return NULL; |
| } |
| client->type = NO_CLIENT; |
| snd_use_lock_init(&client->use_lock); |
| rwlock_init(&client->ports_lock); |
| init_MUTEX(&client->ports_mutex); |
| INIT_LIST_HEAD(&client->ports_list_head); |
| |
| /* find free slot in the client table */ |
| spin_lock_irqsave(&clients_lock, flags); |
| if (client_index < 0) { |
| for (c = 128; c < SNDRV_SEQ_MAX_CLIENTS; c++) { |
| if (clienttab[c] || clienttablock[c]) |
| continue; |
| clienttab[client->number = c] = client; |
| spin_unlock_irqrestore(&clients_lock, flags); |
| return client; |
| } |
| } else { |
| if (clienttab[client_index] == NULL && !clienttablock[client_index]) { |
| clienttab[client->number = client_index] = client; |
| spin_unlock_irqrestore(&clients_lock, flags); |
| return client; |
| } |
| } |
| spin_unlock_irqrestore(&clients_lock, flags); |
| snd_seq_pool_delete(&client->pool); |
| kfree(client); |
| return NULL; /* no free slot found or busy, return failure code */ |
| } |
| |
| |
| static int seq_free_client1(struct snd_seq_client *client) |
| { |
| unsigned long flags; |
| |
| snd_assert(client != NULL, return -EINVAL); |
| snd_seq_delete_all_ports(client); |
| snd_seq_queue_client_leave(client->number); |
| spin_lock_irqsave(&clients_lock, flags); |
| clienttablock[client->number] = 1; |
| clienttab[client->number] = NULL; |
| spin_unlock_irqrestore(&clients_lock, flags); |
| snd_use_lock_sync(&client->use_lock); |
| snd_seq_queue_client_termination(client->number); |
| if (client->pool) |
| snd_seq_pool_delete(&client->pool); |
| spin_lock_irqsave(&clients_lock, flags); |
| clienttablock[client->number] = 0; |
| spin_unlock_irqrestore(&clients_lock, flags); |
| return 0; |
| } |
| |
| |
| static void seq_free_client(struct snd_seq_client * client) |
| { |
| down(®ister_mutex); |
| switch (client->type) { |
| case NO_CLIENT: |
| snd_printk(KERN_WARNING "Seq: Trying to free unused client %d\n", |
| client->number); |
| break; |
| case USER_CLIENT: |
| case KERNEL_CLIENT: |
| seq_free_client1(client); |
| usage_free(&client_usage, 1); |
| break; |
| |
| default: |
| snd_printk(KERN_ERR "Seq: Trying to free client %d with undefined type = %d\n", |
| client->number, client->type); |
| } |
| up(®ister_mutex); |
| |
| snd_seq_system_client_ev_client_exit(client->number); |
| } |
| |
| |
| |
| /* -------------------------------------------------------- */ |
| |
| /* create a user client */ |
| static int snd_seq_open(struct inode *inode, struct file *file) |
| { |
| int c, mode; /* client id */ |
| struct snd_seq_client *client; |
| struct snd_seq_user_client *user; |
| |
| if (down_interruptible(®ister_mutex)) |
| return -ERESTARTSYS; |
| client = seq_create_client1(-1, SNDRV_SEQ_DEFAULT_EVENTS); |
| if (client == NULL) { |
| up(®ister_mutex); |
| return -ENOMEM; /* failure code */ |
| } |
| |
| mode = snd_seq_file_flags(file); |
| if (mode & SNDRV_SEQ_LFLG_INPUT) |
| client->accept_input = 1; |
| if (mode & SNDRV_SEQ_LFLG_OUTPUT) |
| client->accept_output = 1; |
| |
| user = &client->data.user; |
| user->fifo = NULL; |
| user->fifo_pool_size = 0; |
| |
| if (mode & SNDRV_SEQ_LFLG_INPUT) { |
| user->fifo_pool_size = SNDRV_SEQ_DEFAULT_CLIENT_EVENTS; |
| user->fifo = snd_seq_fifo_new(user->fifo_pool_size); |
| if (user->fifo == NULL) { |
| seq_free_client1(client); |
| kfree(client); |
| up(®ister_mutex); |
| return -ENOMEM; |
| } |
| } |
| |
| usage_alloc(&client_usage, 1); |
| client->type = USER_CLIENT; |
| up(®ister_mutex); |
| |
| c = client->number; |
| file->private_data = client; |
| |
| /* fill client data */ |
| user->file = file; |
| sprintf(client->name, "Client-%d", c); |
| |
| /* make others aware this new client */ |
| snd_seq_system_client_ev_client_start(c); |
| |
| return 0; |
| } |
| |
| /* delete a user client */ |
| static int snd_seq_release(struct inode *inode, struct file *file) |
| { |
| struct snd_seq_client *client = file->private_data; |
| |
| if (client) { |
| seq_free_client(client); |
| if (client->data.user.fifo) |
| snd_seq_fifo_delete(&client->data.user.fifo); |
| kfree(client); |
| } |
| |
| return 0; |
| } |
| |
| |
| /* handle client read() */ |
| /* possible error values: |
| * -ENXIO invalid client or file open mode |
| * -ENOSPC FIFO overflow (the flag is cleared after this error report) |
| * -EINVAL no enough user-space buffer to write the whole event |
| * -EFAULT seg. fault during copy to user space |
| */ |
| static ssize_t snd_seq_read(struct file *file, char __user *buf, size_t count, |
| loff_t *offset) |
| { |
| struct snd_seq_client *client = file->private_data; |
| struct snd_seq_fifo *fifo; |
| int err; |
| long result = 0; |
| struct snd_seq_event_cell *cell; |
| |
| if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT)) |
| return -ENXIO; |
| |
| if (!access_ok(VERIFY_WRITE, buf, count)) |
| return -EFAULT; |
| |
| /* check client structures are in place */ |
| snd_assert(client != NULL, return -ENXIO); |
| |
| if (!client->accept_input || (fifo = client->data.user.fifo) == NULL) |
| return -ENXIO; |
| |
| if (atomic_read(&fifo->overflow) > 0) { |
| /* buffer overflow is detected */ |
| snd_seq_fifo_clear(fifo); |
| /* return error code */ |
| return -ENOSPC; |
| } |
| |
| cell = NULL; |
| err = 0; |
| snd_seq_fifo_lock(fifo); |
| |
| /* while data available in queue */ |
| while (count >= sizeof(struct snd_seq_event)) { |
| int nonblock; |
| |
| nonblock = (file->f_flags & O_NONBLOCK) || result > 0; |
| if ((err = snd_seq_fifo_cell_out(fifo, &cell, nonblock)) < 0) { |
| break; |
| } |
| if (snd_seq_ev_is_variable(&cell->event)) { |
| struct snd_seq_event tmpev; |
| tmpev = cell->event; |
| tmpev.data.ext.len &= ~SNDRV_SEQ_EXT_MASK; |
| if (copy_to_user(buf, &tmpev, sizeof(struct snd_seq_event))) { |
| err = -EFAULT; |
| break; |
| } |
| count -= sizeof(struct snd_seq_event); |
| buf += sizeof(struct snd_seq_event); |
| err = snd_seq_expand_var_event(&cell->event, count, |
| (char __force *)buf, 0, |
| sizeof(struct snd_seq_event)); |
| if (err < 0) |
| break; |
| result += err; |
| count -= err; |
| buf += err; |
| } else { |
| if (copy_to_user(buf, &cell->event, sizeof(struct snd_seq_event))) { |
| err = -EFAULT; |
| break; |
| } |
| count -= sizeof(struct snd_seq_event); |
| buf += sizeof(struct snd_seq_event); |
| } |
| snd_seq_cell_free(cell); |
| cell = NULL; /* to be sure */ |
| result += sizeof(struct snd_seq_event); |
| } |
| |
| if (err < 0) { |
| if (cell) |
| snd_seq_fifo_cell_putback(fifo, cell); |
| if (err == -EAGAIN && result > 0) |
| err = 0; |
| } |
| snd_seq_fifo_unlock(fifo); |
| |
| return (err < 0) ? err : result; |
| } |
| |
| |
| /* |
| * check access permission to the port |
| */ |
| static int check_port_perm(struct snd_seq_client_port *port, unsigned int flags) |
| { |
| if ((port->capability & flags) != flags) |
| return 0; |
| return flags; |
| } |
| |
| /* |
| * check if the destination client is available, and return the pointer |
| * if filter is non-zero, client filter bitmap is tested. |
| */ |
| static struct snd_seq_client *get_event_dest_client(struct snd_seq_event *event, |
| int filter) |
| { |
| struct snd_seq_client *dest; |
| |
| dest = snd_seq_client_use_ptr(event->dest.client); |
| if (dest == NULL) |
| return NULL; |
| if (! dest->accept_input) |
| goto __not_avail; |
| if ((dest->filter & SNDRV_SEQ_FILTER_USE_EVENT) && |
| ! test_bit(event->type, dest->event_filter)) |
| goto __not_avail; |
| if (filter && !(dest->filter & filter)) |
| goto __not_avail; |
| |
| return dest; /* ok - accessible */ |
| __not_avail: |
| snd_seq_client_unlock(dest); |
| return NULL; |
| } |
| |
| |
| /* |
| * Return the error event. |
| * |
| * If the receiver client is a user client, the original event is |
| * encapsulated in SNDRV_SEQ_EVENT_BOUNCE as variable length event. If |
| * the original event is also variable length, the external data is |
| * copied after the event record. |
| * If the receiver client is a kernel client, the original event is |
| * quoted in SNDRV_SEQ_EVENT_KERNEL_ERROR, since this requires no extra |
| * kmalloc. |
| */ |
| static int bounce_error_event(struct snd_seq_client *client, |
| struct snd_seq_event *event, |
| int err, int atomic, int hop) |
| { |
| struct snd_seq_event bounce_ev; |
| int result; |
| |
| if (client == NULL || |
| ! (client->filter & SNDRV_SEQ_FILTER_BOUNCE) || |
| ! client->accept_input) |
| return 0; /* ignored */ |
| |
| /* set up quoted error */ |
| memset(&bounce_ev, 0, sizeof(bounce_ev)); |
| bounce_ev.type = SNDRV_SEQ_EVENT_KERNEL_ERROR; |
| bounce_ev.flags = SNDRV_SEQ_EVENT_LENGTH_FIXED; |
| bounce_ev.queue = SNDRV_SEQ_QUEUE_DIRECT; |
| bounce_ev.source.client = SNDRV_SEQ_CLIENT_SYSTEM; |
| bounce_ev.source.port = SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE; |
| bounce_ev.dest.client = client->number; |
| bounce_ev.dest.port = event->source.port; |
| bounce_ev.data.quote.origin = event->dest; |
| bounce_ev.data.quote.event = event; |
| bounce_ev.data.quote.value = -err; /* use positive value */ |
| result = snd_seq_deliver_single_event(NULL, &bounce_ev, 0, atomic, hop + 1); |
| if (result < 0) { |
| client->event_lost++; |
| return result; |
| } |
| |
| return result; |
| } |
| |
| |
| /* |
| * rewrite the time-stamp of the event record with the curren time |
| * of the given queue. |
| * return non-zero if updated. |
| */ |
| static int update_timestamp_of_queue(struct snd_seq_event *event, |
| int queue, int real_time) |
| { |
| struct snd_seq_queue *q; |
| |
| q = queueptr(queue); |
| if (! q) |
| return 0; |
| event->queue = queue; |
| event->flags &= ~SNDRV_SEQ_TIME_STAMP_MASK; |
| if (real_time) { |
| event->time.time = snd_seq_timer_get_cur_time(q->timer); |
| event->flags |= SNDRV_SEQ_TIME_STAMP_REAL; |
| } else { |
| event->time.tick = snd_seq_timer_get_cur_tick(q->timer); |
| event->flags |= SNDRV_SEQ_TIME_STAMP_TICK; |
| } |
| queuefree(q); |
| return 1; |
| } |
| |
| |
| /* |
| * deliver an event to the specified destination. |
| * if filter is non-zero, client filter bitmap is tested. |
| * |
| * RETURN VALUE: 0 : if succeeded |
| * <0 : error |
| */ |
| static int snd_seq_deliver_single_event(struct snd_seq_client *client, |
| struct snd_seq_event *event, |
| int filter, int atomic, int hop) |
| { |
| struct snd_seq_client *dest = NULL; |
| struct snd_seq_client_port *dest_port = NULL; |
| int result = -ENOENT; |
| int direct; |
| |
| direct = snd_seq_ev_is_direct(event); |
| |
| dest = get_event_dest_client(event, filter); |
| if (dest == NULL) |
| goto __skip; |
| dest_port = snd_seq_port_use_ptr(dest, event->dest.port); |
| if (dest_port == NULL) |
| goto __skip; |
| |
| /* check permission */ |
| if (! check_port_perm(dest_port, SNDRV_SEQ_PORT_CAP_WRITE)) { |
| result = -EPERM; |
| goto __skip; |
| } |
| |
| if (dest_port->timestamping) |
| update_timestamp_of_queue(event, dest_port->time_queue, |
| dest_port->time_real); |
| |
| switch (dest->type) { |
| case USER_CLIENT: |
| if (dest->data.user.fifo) |
| result = snd_seq_fifo_event_in(dest->data.user.fifo, event); |
| break; |
| |
| case KERNEL_CLIENT: |
| if (dest_port->event_input == NULL) |
| break; |
| result = dest_port->event_input(event, direct, |
| dest_port->private_data, |
| atomic, hop); |
| break; |
| default: |
| break; |
| } |
| |
| __skip: |
| if (dest_port) |
| snd_seq_port_unlock(dest_port); |
| if (dest) |
| snd_seq_client_unlock(dest); |
| |
| if (result < 0 && !direct) { |
| result = bounce_error_event(client, event, result, atomic, hop); |
| } |
| return result; |
| } |
| |
| |
| /* |
| * send the event to all subscribers: |
| */ |
| static int deliver_to_subscribers(struct snd_seq_client *client, |
| struct snd_seq_event *event, |
| int atomic, int hop) |
| { |
| struct snd_seq_subscribers *subs; |
| int err = 0, num_ev = 0; |
| struct snd_seq_event event_saved; |
| struct snd_seq_client_port *src_port; |
| struct list_head *p; |
| struct snd_seq_port_subs_info *grp; |
| |
| src_port = snd_seq_port_use_ptr(client, event->source.port); |
| if (src_port == NULL) |
| return -EINVAL; /* invalid source port */ |
| /* save original event record */ |
| event_saved = *event; |
| grp = &src_port->c_src; |
| |
| /* lock list */ |
| if (atomic) |
| read_lock(&grp->list_lock); |
| else |
| down_read(&grp->list_mutex); |
| list_for_each(p, &grp->list_head) { |
| subs = list_entry(p, struct snd_seq_subscribers, src_list); |
| event->dest = subs->info.dest; |
| if (subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP) |
| /* convert time according to flag with subscription */ |
| update_timestamp_of_queue(event, subs->info.queue, |
| subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL); |
| err = snd_seq_deliver_single_event(client, event, |
| 0, atomic, hop); |
| if (err < 0) |
| break; |
| num_ev++; |
| /* restore original event record */ |
| *event = event_saved; |
| } |
| if (atomic) |
| read_unlock(&grp->list_lock); |
| else |
| up_read(&grp->list_mutex); |
| *event = event_saved; /* restore */ |
| snd_seq_port_unlock(src_port); |
| return (err < 0) ? err : num_ev; |
| } |
| |
| |
| #ifdef SUPPORT_BROADCAST |
| /* |
| * broadcast to all ports: |
| */ |
| static int port_broadcast_event(struct snd_seq_client *client, |
| struct snd_seq_event *event, |
| int atomic, int hop) |
| { |
| int num_ev = 0, err = 0; |
| struct snd_seq_client *dest_client; |
| struct list_head *p; |
| |
| dest_client = get_event_dest_client(event, SNDRV_SEQ_FILTER_BROADCAST); |
| if (dest_client == NULL) |
| return 0; /* no matching destination */ |
| |
| read_lock(&dest_client->ports_lock); |
| list_for_each(p, &dest_client->ports_list_head) { |
| struct snd_seq_client_port *port = list_entry(p, struct snd_seq_client_port, list); |
| event->dest.port = port->addr.port; |
| /* pass NULL as source client to avoid error bounce */ |
| err = snd_seq_deliver_single_event(NULL, event, |
| SNDRV_SEQ_FILTER_BROADCAST, |
| atomic, hop); |
| if (err < 0) |
| break; |
| num_ev++; |
| } |
| read_unlock(&dest_client->ports_lock); |
| snd_seq_client_unlock(dest_client); |
| event->dest.port = SNDRV_SEQ_ADDRESS_BROADCAST; /* restore */ |
| return (err < 0) ? err : num_ev; |
| } |
| |
| /* |
| * send the event to all clients: |
| * if destination port is also ADDRESS_BROADCAST, deliver to all ports. |
| */ |
| static int broadcast_event(struct snd_seq_client *client, |
| struct snd_seq_event *event, int atomic, int hop) |
| { |
| int err = 0, num_ev = 0; |
| int dest; |
| struct snd_seq_addr addr; |
| |
| addr = event->dest; /* save */ |
| |
| for (dest = 0; dest < SNDRV_SEQ_MAX_CLIENTS; dest++) { |
| /* don't send to itself */ |
| if (dest == client->number) |
| continue; |
| event->dest.client = dest; |
| event->dest.port = addr.port; |
| if (addr.port == SNDRV_SEQ_ADDRESS_BROADCAST) |
| err = port_broadcast_event(client, event, atomic, hop); |
| else |
| /* pass NULL as source client to avoid error bounce */ |
| err = snd_seq_deliver_single_event(NULL, event, |
| SNDRV_SEQ_FILTER_BROADCAST, |
| atomic, hop); |
| if (err < 0) |
| break; |
| num_ev += err; |
| } |
| event->dest = addr; /* restore */ |
| return (err < 0) ? err : num_ev; |
| } |
| |
| |
| /* multicast - not supported yet */ |
| static int multicast_event(struct snd_seq_client *client, struct snd_seq_event *event, |
| int atomic, int hop) |
| { |
| snd_printd("seq: multicast not supported yet.\n"); |
| return 0; /* ignored */ |
| } |
| #endif /* SUPPORT_BROADCAST */ |
| |
| |
| /* deliver an event to the destination port(s). |
| * if the event is to subscribers or broadcast, the event is dispatched |
| * to multiple targets. |
| * |
| * RETURN VALUE: n > 0 : the number of delivered events. |
| * n == 0 : the event was not passed to any client. |
| * n < 0 : error - event was not processed. |
| */ |
| static int snd_seq_deliver_event(struct snd_seq_client *client, struct snd_seq_event *event, |
| int atomic, int hop) |
| { |
| int result; |
| |
| hop++; |
| if (hop >= SNDRV_SEQ_MAX_HOPS) { |
| snd_printd("too long delivery path (%d:%d->%d:%d)\n", |
| event->source.client, event->source.port, |
| event->dest.client, event->dest.port); |
| return -EMLINK; |
| } |
| |
| if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS || |
| event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) |
| result = deliver_to_subscribers(client, event, atomic, hop); |
| #ifdef SUPPORT_BROADCAST |
| else if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST || |
| event->dest.client == SNDRV_SEQ_ADDRESS_BROADCAST) |
| result = broadcast_event(client, event, atomic, hop); |
| else if (event->dest.client >= SNDRV_SEQ_MAX_CLIENTS) |
| result = multicast_event(client, event, atomic, hop); |
| else if (event->dest.port == SNDRV_SEQ_ADDRESS_BROADCAST) |
| result = port_broadcast_event(client, event, atomic, hop); |
| #endif |
| else |
| result = snd_seq_deliver_single_event(client, event, 0, atomic, hop); |
| |
| return result; |
| } |
| |
| /* |
| * dispatch an event cell: |
| * This function is called only from queue check routines in timer |
| * interrupts or after enqueued. |
| * The event cell shall be released or re-queued in this function. |
| * |
| * RETURN VALUE: n > 0 : the number of delivered events. |
| * n == 0 : the event was not passed to any client. |
| * n < 0 : error - event was not processed. |
| */ |
| int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop) |
| { |
| struct snd_seq_client *client; |
| int result; |
| |
| snd_assert(cell != NULL, return -EINVAL); |
| |
| client = snd_seq_client_use_ptr(cell->event.source.client); |
| if (client == NULL) { |
| snd_seq_cell_free(cell); /* release this cell */ |
| return -EINVAL; |
| } |
| |
| if (cell->event.type == SNDRV_SEQ_EVENT_NOTE) { |
| /* NOTE event: |
| * the event cell is re-used as a NOTE-OFF event and |
| * enqueued again. |
| */ |
| struct snd_seq_event tmpev, *ev; |
| |
| /* reserve this event to enqueue note-off later */ |
| tmpev = cell->event; |
| tmpev.type = SNDRV_SEQ_EVENT_NOTEON; |
| result = snd_seq_deliver_event(client, &tmpev, atomic, hop); |
| |
| /* |
| * This was originally a note event. We now re-use the |
| * cell for the note-off event. |
| */ |
| |
| ev = &cell->event; |
| ev->type = SNDRV_SEQ_EVENT_NOTEOFF; |
| ev->flags |= SNDRV_SEQ_PRIORITY_HIGH; |
| |
| /* add the duration time */ |
| switch (ev->flags & SNDRV_SEQ_TIME_STAMP_MASK) { |
| case SNDRV_SEQ_TIME_STAMP_TICK: |
| ev->time.tick += ev->data.note.duration; |
| break; |
| case SNDRV_SEQ_TIME_STAMP_REAL: |
| /* unit for duration is ms */ |
| ev->time.time.tv_nsec += 1000000 * (ev->data.note.duration % 1000); |
| ev->time.time.tv_sec += ev->data.note.duration / 1000 + |
| ev->time.time.tv_nsec / 1000000000; |
| ev->time.time.tv_nsec %= 1000000000; |
| break; |
| } |
| ev->data.note.velocity = ev->data.note.off_velocity; |
| |
| /* Now queue this cell as the note off event */ |
| if (snd_seq_enqueue_event(cell, atomic, hop) < 0) |
| snd_seq_cell_free(cell); /* release this cell */ |
| |
| } else { |
| /* Normal events: |
| * event cell is freed after processing the event |
| */ |
| |
| result = snd_seq_deliver_event(client, &cell->event, atomic, hop); |
| snd_seq_cell_free(cell); |
| } |
| |
| snd_seq_client_unlock(client); |
| return result; |
| } |
| |
| |
| /* Allocate a cell from client pool and enqueue it to queue: |
| * if pool is empty and blocking is TRUE, sleep until a new cell is |
| * available. |
| */ |
| static int snd_seq_client_enqueue_event(struct snd_seq_client *client, |
| struct snd_seq_event *event, |
| struct file *file, int blocking, |
| int atomic, int hop) |
| { |
| struct snd_seq_event_cell *cell; |
| int err; |
| |
| /* special queue values - force direct passing */ |
| if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) { |
| event->dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS; |
| event->queue = SNDRV_SEQ_QUEUE_DIRECT; |
| } else |
| #ifdef SUPPORT_BROADCAST |
| if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST) { |
| event->dest.client = SNDRV_SEQ_ADDRESS_BROADCAST; |
| event->queue = SNDRV_SEQ_QUEUE_DIRECT; |
| } |
| #endif |
| if (event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) { |
| /* check presence of source port */ |
| struct snd_seq_client_port *src_port = snd_seq_port_use_ptr(client, event->source.port); |
| if (src_port == NULL) |
| return -EINVAL; |
| snd_seq_port_unlock(src_port); |
| } |
| |
| /* direct event processing without enqueued */ |
| if (snd_seq_ev_is_direct(event)) { |
| if (event->type == SNDRV_SEQ_EVENT_NOTE) |
| return -EINVAL; /* this event must be enqueued! */ |
| return snd_seq_deliver_event(client, event, atomic, hop); |
| } |
| |
| /* Not direct, normal queuing */ |
| if (snd_seq_queue_is_used(event->queue, client->number) <= 0) |
| return -EINVAL; /* invalid queue */ |
| if (! snd_seq_write_pool_allocated(client)) |
| return -ENXIO; /* queue is not allocated */ |
| |
| /* allocate an event cell */ |
| err = snd_seq_event_dup(client->pool, event, &cell, !blocking || atomic, file); |
| if (err < 0) |
| return err; |
| |
| /* we got a cell. enqueue it. */ |
| if ((err = snd_seq_enqueue_event(cell, atomic, hop)) < 0) { |
| snd_seq_cell_free(cell); |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| |
| /* |
| * check validity of event type and data length. |
| * return non-zero if invalid. |
| */ |
| static int check_event_type_and_length(struct snd_seq_event *ev) |
| { |
| switch (snd_seq_ev_length_type(ev)) { |
| case SNDRV_SEQ_EVENT_LENGTH_FIXED: |
| if (snd_seq_ev_is_variable_type(ev)) |
| return -EINVAL; |
| break; |
| case SNDRV_SEQ_EVENT_LENGTH_VARIABLE: |
| if (! snd_seq_ev_is_variable_type(ev) || |
| (ev->data.ext.len & ~SNDRV_SEQ_EXT_MASK) >= SNDRV_SEQ_MAX_EVENT_LEN) |
| return -EINVAL; |
| break; |
| case SNDRV_SEQ_EVENT_LENGTH_VARUSR: |
| if (! snd_seq_ev_is_instr_type(ev) || |
| ! snd_seq_ev_is_direct(ev)) |
| return -EINVAL; |
| break; |
| } |
| return 0; |
| } |
| |
| |
| /* handle write() */ |
| /* possible error values: |
| * -ENXIO invalid client or file open mode |
| * -ENOMEM malloc failed |
| * -EFAULT seg. fault during copy from user space |
| * -EINVAL invalid event |
| * -EAGAIN no space in output pool |
| * -EINTR interrupts while sleep |
| * -EMLINK too many hops |
| * others depends on return value from driver callback |
| */ |
| static ssize_t snd_seq_write(struct file *file, const char __user *buf, |
| size_t count, loff_t *offset) |
| { |
| struct snd_seq_client *client = file->private_data; |
| int written = 0, len; |
| int err = -EINVAL; |
| struct snd_seq_event event; |
| |
| if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT)) |
| return -ENXIO; |
| |
| /* check client structures are in place */ |
| snd_assert(client != NULL, return -ENXIO); |
| |
| if (!client->accept_output || client->pool == NULL) |
| return -ENXIO; |
| |
| /* allocate the pool now if the pool is not allocated yet */ |
| if (client->pool->size > 0 && !snd_seq_write_pool_allocated(client)) { |
| if (snd_seq_pool_init(client->pool) < 0) |
| return -ENOMEM; |
| } |
| |
| /* only process whole events */ |
| while (count >= sizeof(struct snd_seq_event)) { |
| /* Read in the event header from the user */ |
| len = sizeof(event); |
| if (copy_from_user(&event, buf, len)) { |
| err = -EFAULT; |
| break; |
| } |
| event.source.client = client->number; /* fill in client number */ |
| /* Check for extension data length */ |
| if (check_event_type_and_length(&event)) { |
| err = -EINVAL; |
| break; |
| } |
| |
| /* check for special events */ |
| if (event.type == SNDRV_SEQ_EVENT_NONE) |
| goto __skip_event; |
| else if (snd_seq_ev_is_reserved(&event)) { |
| err = -EINVAL; |
| break; |
| } |
| |
| if (snd_seq_ev_is_variable(&event)) { |
| int extlen = event.data.ext.len & ~SNDRV_SEQ_EXT_MASK; |
| if ((size_t)(extlen + len) > count) { |
| /* back out, will get an error this time or next */ |
| err = -EINVAL; |
| break; |
| } |
| /* set user space pointer */ |
| event.data.ext.len = extlen | SNDRV_SEQ_EXT_USRPTR; |
| event.data.ext.ptr = (char __force *)buf |
| + sizeof(struct snd_seq_event); |
| len += extlen; /* increment data length */ |
| } else { |
| #ifdef CONFIG_COMPAT |
| if (client->convert32 && snd_seq_ev_is_varusr(&event)) { |
| void *ptr = compat_ptr(event.data.raw32.d[1]); |
| event.data.ext.ptr = ptr; |
| } |
| #endif |
| } |
| |
| /* ok, enqueue it */ |
| err = snd_seq_client_enqueue_event(client, &event, file, |
| !(file->f_flags & O_NONBLOCK), |
| 0, 0); |
| if (err < 0) |
| break; |
| |
| __skip_event: |
| /* Update pointers and counts */ |
| count -= len; |
| buf += len; |
| written += len; |
| } |
| |
| return written ? written : err; |
| } |
| |
| |
| /* |
| * handle polling |
| */ |
| static unsigned int snd_seq_poll(struct file *file, poll_table * wait) |
| { |
| struct snd_seq_client *client = file->private_data; |
| unsigned int mask = 0; |
| |
| /* check client structures are in place */ |
| snd_assert(client != NULL, return -ENXIO); |
| |
| if ((snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT) && |
| client->data.user.fifo) { |
| |
| /* check if data is available in the outqueue */ |
| if (snd_seq_fifo_poll_wait(client->data.user.fifo, file, wait)) |
| mask |= POLLIN | POLLRDNORM; |
| } |
| |
| if (snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT) { |
| |
| /* check if data is available in the pool */ |
| if (!snd_seq_write_pool_allocated(client) || |
| snd_seq_pool_poll_wait(client->pool, file, wait)) |
| mask |= POLLOUT | POLLWRNORM; |
| } |
| |
| return mask; |
| } |
| |
| |
| /*-----------------------------------------------------*/ |
| |
| |
| /* SYSTEM_INFO ioctl() */ |
| static int snd_seq_ioctl_system_info(struct snd_seq_client *client, void __user *arg) |
| { |
| struct snd_seq_system_info info; |
| |
| memset(&info, 0, sizeof(info)); |
| /* fill the info fields */ |
| info.queues = SNDRV_SEQ_MAX_QUEUES; |
| info.clients = SNDRV_SEQ_MAX_CLIENTS; |
| info.ports = 256; /* fixed limit */ |
| info.channels = 256; /* fixed limit */ |
| info.cur_clients = client_usage.cur; |
| info.cur_queues = snd_seq_queue_get_cur_queues(); |
| |
| if (copy_to_user(arg, &info, sizeof(info))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| |
| /* RUNNING_MODE ioctl() */ |
| static int snd_seq_ioctl_running_mode(struct snd_seq_client *client, void __user *arg) |
| { |
| struct snd_seq_running_info info; |
| struct snd_seq_client *cptr; |
| int err = 0; |
| |
| if (copy_from_user(&info, arg, sizeof(info))) |
| return -EFAULT; |
| |
| /* requested client number */ |
| cptr = snd_seq_client_use_ptr(info.client); |
| if (cptr == NULL) |
| return -ENOENT; /* don't change !!! */ |
| |
| #ifdef SNDRV_BIG_ENDIAN |
| if (! info.big_endian) { |
| err = -EINVAL; |
| goto __err; |
| } |
| #else |
| if (info.big_endian) { |
| err = -EINVAL; |
| goto __err; |
| } |
| |
| #endif |
| if (info.cpu_mode > sizeof(long)) { |
| err = -EINVAL; |
| goto __err; |
| } |
| cptr->convert32 = (info.cpu_mode < sizeof(long)); |
| __err: |
| snd_seq_client_unlock(cptr); |
| return err; |
| } |
| |
| /* CLIENT_INFO ioctl() */ |
| static void get_client_info(struct snd_seq_client *cptr, |
| struct snd_seq_client_info *info) |
| { |
| info->client = cptr->number; |
| |
| /* fill the info fields */ |
| info->type = cptr->type; |
| strcpy(info->name, cptr->name); |
| info->filter = cptr->filter; |
| info->event_lost = cptr->event_lost; |
| memcpy(info->event_filter, cptr->event_filter, 32); |
| info->num_ports = cptr->num_ports; |
| memset(info->reserved, 0, sizeof(info->reserved)); |
| } |
| |
| static int snd_seq_ioctl_get_client_info(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| struct snd_seq_client *cptr; |
| struct snd_seq_client_info client_info; |
| |
| if (copy_from_user(&client_info, arg, sizeof(client_info))) |
| return -EFAULT; |
| |
| /* requested client number */ |
| cptr = snd_seq_client_use_ptr(client_info.client); |
| if (cptr == NULL) |
| return -ENOENT; /* don't change !!! */ |
| |
| get_client_info(cptr, &client_info); |
| snd_seq_client_unlock(cptr); |
| |
| if (copy_to_user(arg, &client_info, sizeof(client_info))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| |
| /* CLIENT_INFO ioctl() */ |
| static int snd_seq_ioctl_set_client_info(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| struct snd_seq_client_info client_info; |
| |
| if (copy_from_user(&client_info, arg, sizeof(client_info))) |
| return -EFAULT; |
| |
| /* it is not allowed to set the info fields for an another client */ |
| if (client->number != client_info.client) |
| return -EPERM; |
| /* also client type must be set now */ |
| if (client->type != client_info.type) |
| return -EINVAL; |
| |
| /* fill the info fields */ |
| if (client_info.name[0]) |
| strlcpy(client->name, client_info.name, sizeof(client->name)); |
| |
| client->filter = client_info.filter; |
| client->event_lost = client_info.event_lost; |
| memcpy(client->event_filter, client_info.event_filter, 32); |
| |
| return 0; |
| } |
| |
| |
| /* |
| * CREATE PORT ioctl() |
| */ |
| static int snd_seq_ioctl_create_port(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| struct snd_seq_client_port *port; |
| struct snd_seq_port_info info; |
| struct snd_seq_port_callback *callback; |
| |
| if (copy_from_user(&info, arg, sizeof(info))) |
| return -EFAULT; |
| |
| /* it is not allowed to create the port for an another client */ |
| if (info.addr.client != client->number) |
| return -EPERM; |
| |
| port = snd_seq_create_port(client, (info.flags & SNDRV_SEQ_PORT_FLG_GIVEN_PORT) ? info.addr.port : -1); |
| if (port == NULL) |
| return -ENOMEM; |
| |
| if (client->type == USER_CLIENT && info.kernel) { |
| snd_seq_delete_port(client, port->addr.port); |
| return -EINVAL; |
| } |
| if (client->type == KERNEL_CLIENT) { |
| if ((callback = info.kernel) != NULL) { |
| if (callback->owner) |
| port->owner = callback->owner; |
| port->private_data = callback->private_data; |
| port->private_free = callback->private_free; |
| port->callback_all = callback->callback_all; |
| port->event_input = callback->event_input; |
| port->c_src.open = callback->subscribe; |
| port->c_src.close = callback->unsubscribe; |
| port->c_dest.open = callback->use; |
| port->c_dest.close = callback->unuse; |
| } |
| } |
| |
| info.addr = port->addr; |
| |
| snd_seq_set_port_info(port, &info); |
| snd_seq_system_client_ev_port_start(port->addr.client, port->addr.port); |
| |
| if (copy_to_user(arg, &info, sizeof(info))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| /* |
| * DELETE PORT ioctl() |
| */ |
| static int snd_seq_ioctl_delete_port(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| struct snd_seq_port_info info; |
| int err; |
| |
| /* set passed parameters */ |
| if (copy_from_user(&info, arg, sizeof(info))) |
| return -EFAULT; |
| |
| /* it is not allowed to remove the port for an another client */ |
| if (info.addr.client != client->number) |
| return -EPERM; |
| |
| err = snd_seq_delete_port(client, info.addr.port); |
| if (err >= 0) |
| snd_seq_system_client_ev_port_exit(client->number, info.addr.port); |
| return err; |
| } |
| |
| |
| /* |
| * GET_PORT_INFO ioctl() (on any client) |
| */ |
| static int snd_seq_ioctl_get_port_info(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| struct snd_seq_client *cptr; |
| struct snd_seq_client_port *port; |
| struct snd_seq_port_info info; |
| |
| if (copy_from_user(&info, arg, sizeof(info))) |
| return -EFAULT; |
| cptr = snd_seq_client_use_ptr(info.addr.client); |
| if (cptr == NULL) |
| return -ENXIO; |
| |
| port = snd_seq_port_use_ptr(cptr, info.addr.port); |
| if (port == NULL) { |
| snd_seq_client_unlock(cptr); |
| return -ENOENT; /* don't change */ |
| } |
| |
| /* get port info */ |
| snd_seq_get_port_info(port, &info); |
| snd_seq_port_unlock(port); |
| snd_seq_client_unlock(cptr); |
| |
| if (copy_to_user(arg, &info, sizeof(info))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| |
| /* |
| * SET_PORT_INFO ioctl() (only ports on this/own client) |
| */ |
| static int snd_seq_ioctl_set_port_info(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| struct snd_seq_client_port *port; |
| struct snd_seq_port_info info; |
| |
| if (copy_from_user(&info, arg, sizeof(info))) |
| return -EFAULT; |
| |
| if (info.addr.client != client->number) /* only set our own ports ! */ |
| return -EPERM; |
| port = snd_seq_port_use_ptr(client, info.addr.port); |
| if (port) { |
| snd_seq_set_port_info(port, &info); |
| snd_seq_port_unlock(port); |
| } |
| return 0; |
| } |
| |
| |
| /* |
| * port subscription (connection) |
| */ |
| #define PERM_RD (SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ) |
| #define PERM_WR (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_SUBS_WRITE) |
| |
| static int check_subscription_permission(struct snd_seq_client *client, |
| struct snd_seq_client_port *sport, |
| struct snd_seq_client_port *dport, |
| struct snd_seq_port_subscribe *subs) |
| { |
| if (client->number != subs->sender.client && |
| client->number != subs->dest.client) { |
| /* connection by third client - check export permission */ |
| if (check_port_perm(sport, SNDRV_SEQ_PORT_CAP_NO_EXPORT)) |
| return -EPERM; |
| if (check_port_perm(dport, SNDRV_SEQ_PORT_CAP_NO_EXPORT)) |
| return -EPERM; |
| } |
| |
| /* check read permission */ |
| /* if sender or receiver is the subscribing client itself, |
| * no permission check is necessary |
| */ |
| if (client->number != subs->sender.client) { |
| if (! check_port_perm(sport, PERM_RD)) |
| return -EPERM; |
| } |
| /* check write permission */ |
| if (client->number != subs->dest.client) { |
| if (! check_port_perm(dport, PERM_WR)) |
| return -EPERM; |
| } |
| return 0; |
| } |
| |
| /* |
| * send an subscription notify event to user client: |
| * client must be user client. |
| */ |
| int snd_seq_client_notify_subscription(int client, int port, |
| struct snd_seq_port_subscribe *info, |
| int evtype) |
| { |
| struct snd_seq_event event; |
| |
| memset(&event, 0, sizeof(event)); |
| event.type = evtype; |
| event.data.connect.dest = info->dest; |
| event.data.connect.sender = info->sender; |
| |
| return snd_seq_system_notify(client, port, &event); /* non-atomic */ |
| } |
| |
| |
| /* |
| * add to port's subscription list IOCTL interface |
| */ |
| static int snd_seq_ioctl_subscribe_port(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| int result = -EINVAL; |
| struct snd_seq_client *receiver = NULL, *sender = NULL; |
| struct snd_seq_client_port *sport = NULL, *dport = NULL; |
| struct snd_seq_port_subscribe subs; |
| |
| if (copy_from_user(&subs, arg, sizeof(subs))) |
| return -EFAULT; |
| |
| if ((receiver = snd_seq_client_use_ptr(subs.dest.client)) == NULL) |
| goto __end; |
| if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL) |
| goto __end; |
| if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL) |
| goto __end; |
| if ((dport = snd_seq_port_use_ptr(receiver, subs.dest.port)) == NULL) |
| goto __end; |
| |
| result = check_subscription_permission(client, sport, dport, &subs); |
| if (result < 0) |
| goto __end; |
| |
| /* connect them */ |
| result = snd_seq_port_connect(client, sender, sport, receiver, dport, &subs); |
| if (! result) /* broadcast announce */ |
| snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0, |
| &subs, SNDRV_SEQ_EVENT_PORT_SUBSCRIBED); |
| __end: |
| if (sport) |
| snd_seq_port_unlock(sport); |
| if (dport) |
| snd_seq_port_unlock(dport); |
| if (sender) |
| snd_seq_client_unlock(sender); |
| if (receiver) |
| snd_seq_client_unlock(receiver); |
| return result; |
| } |
| |
| |
| /* |
| * remove from port's subscription list |
| */ |
| static int snd_seq_ioctl_unsubscribe_port(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| int result = -ENXIO; |
| struct snd_seq_client *receiver = NULL, *sender = NULL; |
| struct snd_seq_client_port *sport = NULL, *dport = NULL; |
| struct snd_seq_port_subscribe subs; |
| |
| if (copy_from_user(&subs, arg, sizeof(subs))) |
| return -EFAULT; |
| |
| if ((receiver = snd_seq_client_use_ptr(subs.dest.client)) == NULL) |
| goto __end; |
| if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL) |
| goto __end; |
| if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL) |
| goto __end; |
| if ((dport = snd_seq_port_use_ptr(receiver, subs.dest.port)) == NULL) |
| goto __end; |
| |
| result = check_subscription_permission(client, sport, dport, &subs); |
| if (result < 0) |
| goto __end; |
| |
| result = snd_seq_port_disconnect(client, sender, sport, receiver, dport, &subs); |
| if (! result) /* broadcast announce */ |
| snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0, |
| &subs, SNDRV_SEQ_EVENT_PORT_UNSUBSCRIBED); |
| __end: |
| if (sport) |
| snd_seq_port_unlock(sport); |
| if (dport) |
| snd_seq_port_unlock(dport); |
| if (sender) |
| snd_seq_client_unlock(sender); |
| if (receiver) |
| snd_seq_client_unlock(receiver); |
| return result; |
| } |
| |
| |
| /* CREATE_QUEUE ioctl() */ |
| static int snd_seq_ioctl_create_queue(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| struct snd_seq_queue_info info; |
| int result; |
| struct snd_seq_queue *q; |
| |
| if (copy_from_user(&info, arg, sizeof(info))) |
| return -EFAULT; |
| |
| result = snd_seq_queue_alloc(client->number, info.locked, info.flags); |
| if (result < 0) |
| return result; |
| |
| q = queueptr(result); |
| if (q == NULL) |
| return -EINVAL; |
| |
| info.queue = q->queue; |
| info.locked = q->locked; |
| info.owner = q->owner; |
| |
| /* set queue name */ |
| if (! info.name[0]) |
| snprintf(info.name, sizeof(info.name), "Queue-%d", q->queue); |
| strlcpy(q->name, info.name, sizeof(q->name)); |
| queuefree(q); |
| |
| if (copy_to_user(arg, &info, sizeof(info))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| /* DELETE_QUEUE ioctl() */ |
| static int snd_seq_ioctl_delete_queue(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| struct snd_seq_queue_info info; |
| |
| if (copy_from_user(&info, arg, sizeof(info))) |
| return -EFAULT; |
| |
| return snd_seq_queue_delete(client->number, info.queue); |
| } |
| |
| /* GET_QUEUE_INFO ioctl() */ |
| static int snd_seq_ioctl_get_queue_info(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| struct snd_seq_queue_info info; |
| struct snd_seq_queue *q; |
| |
| if (copy_from_user(&info, arg, sizeof(info))) |
| return -EFAULT; |
| |
| q = queueptr(info.queue); |
| if (q == NULL) |
| return -EINVAL; |
| |
| memset(&info, 0, sizeof(info)); |
| info.queue = q->queue; |
| info.owner = q->owner; |
| info.locked = q->locked; |
| strlcpy(info.name, q->name, sizeof(info.name)); |
| queuefree(q); |
| |
| if (copy_to_user(arg, &info, sizeof(info))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| /* SET_QUEUE_INFO ioctl() */ |
| static int snd_seq_ioctl_set_queue_info(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| struct snd_seq_queue_info info; |
| struct snd_seq_queue *q; |
| |
| if (copy_from_user(&info, arg, sizeof(info))) |
| return -EFAULT; |
| |
| if (info.owner != client->number) |
| return -EINVAL; |
| |
| /* change owner/locked permission */ |
| if (snd_seq_queue_check_access(info.queue, client->number)) { |
| if (snd_seq_queue_set_owner(info.queue, client->number, info.locked) < 0) |
| return -EPERM; |
| if (info.locked) |
| snd_seq_queue_use(info.queue, client->number, 1); |
| } else { |
| return -EPERM; |
| } |
| |
| q = queueptr(info.queue); |
| if (! q) |
| return -EINVAL; |
| if (q->owner != client->number) { |
| queuefree(q); |
| return -EPERM; |
| } |
| strlcpy(q->name, info.name, sizeof(q->name)); |
| queuefree(q); |
| |
| return 0; |
| } |
| |
| /* GET_NAMED_QUEUE ioctl() */ |
| static int snd_seq_ioctl_get_named_queue(struct snd_seq_client *client, void __user *arg) |
| { |
| struct snd_seq_queue_info info; |
| struct snd_seq_queue *q; |
| |
| if (copy_from_user(&info, arg, sizeof(info))) |
| return -EFAULT; |
| |
| q = snd_seq_queue_find_name(info.name); |
| if (q == NULL) |
| return -EINVAL; |
| info.queue = q->queue; |
| info.owner = q->owner; |
| info.locked = q->locked; |
| queuefree(q); |
| |
| if (copy_to_user(arg, &info, sizeof(info))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| /* GET_QUEUE_STATUS ioctl() */ |
| static int snd_seq_ioctl_get_queue_status(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| struct snd_seq_queue_status status; |
| struct snd_seq_queue *queue; |
| struct snd_seq_timer *tmr; |
| |
| if (copy_from_user(&status, arg, sizeof(status))) |
| return -EFAULT; |
| |
| queue = queueptr(status.queue); |
| if (queue == NULL) |
| return -EINVAL; |
| memset(&status, 0, sizeof(status)); |
| status.queue = queue->queue; |
| |
| tmr = queue->timer; |
| status.events = queue->tickq->cells + queue->timeq->cells; |
| |
| status.time = snd_seq_timer_get_cur_time(tmr); |
| status.tick = snd_seq_timer_get_cur_tick(tmr); |
| |
| status.running = tmr->running; |
| |
| status.flags = queue->flags; |
| queuefree(queue); |
| |
| if (copy_to_user(arg, &status, sizeof(status))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| |
| /* GET_QUEUE_TEMPO ioctl() */ |
| static int snd_seq_ioctl_get_queue_tempo(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| struct snd_seq_queue_tempo tempo; |
| struct snd_seq_queue *queue; |
| struct snd_seq_timer *tmr; |
| |
| if (copy_from_user(&tempo, arg, sizeof(tempo))) |
| return -EFAULT; |
| |
| queue = queueptr(tempo.queue); |
| if (queue == NULL) |
| return -EINVAL; |
| memset(&tempo, 0, sizeof(tempo)); |
| tempo.queue = queue->queue; |
| |
| tmr = queue->timer; |
| |
| tempo.tempo = tmr->tempo; |
| tempo.ppq = tmr->ppq; |
| tempo.skew_value = tmr->skew; |
| tempo.skew_base = tmr->skew_base; |
| queuefree(queue); |
| |
| if (copy_to_user(arg, &tempo, sizeof(tempo))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| |
| /* SET_QUEUE_TEMPO ioctl() */ |
| int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo) |
| { |
| if (!snd_seq_queue_check_access(tempo->queue, client)) |
| return -EPERM; |
| return snd_seq_queue_timer_set_tempo(tempo->queue, client, tempo); |
| } |
| |
| static int snd_seq_ioctl_set_queue_tempo(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| int result; |
| struct snd_seq_queue_tempo tempo; |
| |
| if (copy_from_user(&tempo, arg, sizeof(tempo))) |
| return -EFAULT; |
| |
| result = snd_seq_set_queue_tempo(client->number, &tempo); |
| return result < 0 ? result : 0; |
| } |
| |
| |
| /* GET_QUEUE_TIMER ioctl() */ |
| static int snd_seq_ioctl_get_queue_timer(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| struct snd_seq_queue_timer timer; |
| struct snd_seq_queue *queue; |
| struct snd_seq_timer *tmr; |
| |
| if (copy_from_user(&timer, arg, sizeof(timer))) |
| return -EFAULT; |
| |
| queue = queueptr(timer.queue); |
| if (queue == NULL) |
| return -EINVAL; |
| |
| if (down_interruptible(&queue->timer_mutex)) { |
| queuefree(queue); |
| return -ERESTARTSYS; |
| } |
| tmr = queue->timer; |
| memset(&timer, 0, sizeof(timer)); |
| timer.queue = queue->queue; |
| |
| timer.type = tmr->type; |
| if (tmr->type == SNDRV_SEQ_TIMER_ALSA) { |
| timer.u.alsa.id = tmr->alsa_id; |
| timer.u.alsa.resolution = tmr->preferred_resolution; |
| } |
| up(&queue->timer_mutex); |
| queuefree(queue); |
| |
| if (copy_to_user(arg, &timer, sizeof(timer))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| |
| /* SET_QUEUE_TIMER ioctl() */ |
| static int snd_seq_ioctl_set_queue_timer(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| int result = 0; |
| struct snd_seq_queue_timer timer; |
| |
| if (copy_from_user(&timer, arg, sizeof(timer))) |
| return -EFAULT; |
| |
| if (timer.type != SNDRV_SEQ_TIMER_ALSA) |
| return -EINVAL; |
| |
| if (snd_seq_queue_check_access(timer.queue, client->number)) { |
| struct snd_seq_queue *q; |
| struct snd_seq_timer *tmr; |
| |
| q = queueptr(timer.queue); |
| if (q == NULL) |
| return -ENXIO; |
| if (down_interruptible(&q->timer_mutex)) { |
| queuefree(q); |
| return -ERESTARTSYS; |
| } |
| tmr = q->timer; |
| snd_seq_queue_timer_close(timer.queue); |
| tmr->type = timer.type; |
| if (tmr->type == SNDRV_SEQ_TIMER_ALSA) { |
| tmr->alsa_id = timer.u.alsa.id; |
| tmr->preferred_resolution = timer.u.alsa.resolution; |
| } |
| result = snd_seq_queue_timer_open(timer.queue); |
| up(&q->timer_mutex); |
| queuefree(q); |
| } else { |
| return -EPERM; |
| } |
| |
| return result; |
| } |
| |
| |
| /* GET_QUEUE_CLIENT ioctl() */ |
| static int snd_seq_ioctl_get_queue_client(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| struct snd_seq_queue_client info; |
| int used; |
| |
| if (copy_from_user(&info, arg, sizeof(info))) |
| return -EFAULT; |
| |
| used = snd_seq_queue_is_used(info.queue, client->number); |
| if (used < 0) |
| return -EINVAL; |
| info.used = used; |
| info.client = client->number; |
| |
| if (copy_to_user(arg, &info, sizeof(info))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| |
| /* SET_QUEUE_CLIENT ioctl() */ |
| static int snd_seq_ioctl_set_queue_client(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| int err; |
| struct snd_seq_queue_client info; |
| |
| if (copy_from_user(&info, arg, sizeof(info))) |
| return -EFAULT; |
| |
| if (info.used >= 0) { |
| err = snd_seq_queue_use(info.queue, client->number, info.used); |
| if (err < 0) |
| return err; |
| } |
| |
| return snd_seq_ioctl_get_queue_client(client, arg); |
| } |
| |
| |
| /* GET_CLIENT_POOL ioctl() */ |
| static int snd_seq_ioctl_get_client_pool(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| struct snd_seq_client_pool info; |
| struct snd_seq_client *cptr; |
| |
| if (copy_from_user(&info, arg, sizeof(info))) |
| return -EFAULT; |
| |
| cptr = snd_seq_client_use_ptr(info.client); |
| if (cptr == NULL) |
| return -ENOENT; |
| memset(&info, 0, sizeof(info)); |
| info.output_pool = cptr->pool->size; |
| info.output_room = cptr->pool->room; |
| info.output_free = info.output_pool; |
| if (cptr->pool) |
| info.output_free = snd_seq_unused_cells(cptr->pool); |
| if (cptr->type == USER_CLIENT) { |
| info.input_pool = cptr->data.user.fifo_pool_size; |
| info.input_free = info.input_pool; |
| if (cptr->data.user.fifo) |
| info.input_free = snd_seq_unused_cells(cptr->data.user.fifo->pool); |
| } else { |
| info.input_pool = 0; |
| info.input_free = 0; |
| } |
| snd_seq_client_unlock(cptr); |
| |
| if (copy_to_user(arg, &info, sizeof(info))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| /* SET_CLIENT_POOL ioctl() */ |
| static int snd_seq_ioctl_set_client_pool(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| struct snd_seq_client_pool info; |
| int rc; |
| |
| if (copy_from_user(&info, arg, sizeof(info))) |
| return -EFAULT; |
| |
| if (client->number != info.client) |
| return -EINVAL; /* can't change other clients */ |
| |
| if (info.output_pool >= 1 && info.output_pool <= SNDRV_SEQ_MAX_EVENTS && |
| (! snd_seq_write_pool_allocated(client) || |
| info.output_pool != client->pool->size)) { |
| if (snd_seq_write_pool_allocated(client)) { |
| /* remove all existing cells */ |
| snd_seq_queue_client_leave_cells(client->number); |
| snd_seq_pool_done(client->pool); |
| } |
| client->pool->size = info.output_pool; |
| rc = snd_seq_pool_init(client->pool); |
| if (rc < 0) |
| return rc; |
| } |
| if (client->type == USER_CLIENT && client->data.user.fifo != NULL && |
| info.input_pool >= 1 && |
| info.input_pool <= SNDRV_SEQ_MAX_CLIENT_EVENTS && |
| info.input_pool != client->data.user.fifo_pool_size) { |
| /* change pool size */ |
| rc = snd_seq_fifo_resize(client->data.user.fifo, info.input_pool); |
| if (rc < 0) |
| return rc; |
| client->data.user.fifo_pool_size = info.input_pool; |
| } |
| if (info.output_room >= 1 && |
| info.output_room <= client->pool->size) { |
| client->pool->room = info.output_room; |
| } |
| |
| return snd_seq_ioctl_get_client_pool(client, arg); |
| } |
| |
| |
| /* REMOVE_EVENTS ioctl() */ |
| static int snd_seq_ioctl_remove_events(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| struct snd_seq_remove_events info; |
| |
| if (copy_from_user(&info, arg, sizeof(info))) |
| return -EFAULT; |
| |
| /* |
| * Input mostly not implemented XXX. |
| */ |
| if (info.remove_mode & SNDRV_SEQ_REMOVE_INPUT) { |
| /* |
| * No restrictions so for a user client we can clear |
| * the whole fifo |
| */ |
| if (client->type == USER_CLIENT) |
| snd_seq_fifo_clear(client->data.user.fifo); |
| } |
| |
| if (info.remove_mode & SNDRV_SEQ_REMOVE_OUTPUT) |
| snd_seq_queue_remove_cells(client->number, &info); |
| |
| return 0; |
| } |
| |
| |
| /* |
| * get subscription info |
| */ |
| static int snd_seq_ioctl_get_subscription(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| int result; |
| struct snd_seq_client *sender = NULL; |
| struct snd_seq_client_port *sport = NULL; |
| struct snd_seq_port_subscribe subs; |
| struct snd_seq_subscribers *p; |
| |
| if (copy_from_user(&subs, arg, sizeof(subs))) |
| return -EFAULT; |
| |
| result = -EINVAL; |
| if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL) |
| goto __end; |
| if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL) |
| goto __end; |
| p = snd_seq_port_get_subscription(&sport->c_src, &subs.dest); |
| if (p) { |
| result = 0; |
| subs = p->info; |
| } else |
| result = -ENOENT; |
| |
| __end: |
| if (sport) |
| snd_seq_port_unlock(sport); |
| if (sender) |
| snd_seq_client_unlock(sender); |
| if (result >= 0) { |
| if (copy_to_user(arg, &subs, sizeof(subs))) |
| return -EFAULT; |
| } |
| return result; |
| } |
| |
| |
| /* |
| * get subscription info - check only its presence |
| */ |
| static int snd_seq_ioctl_query_subs(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| int result = -ENXIO; |
| struct snd_seq_client *cptr = NULL; |
| struct snd_seq_client_port *port = NULL; |
| struct snd_seq_query_subs subs; |
| struct snd_seq_port_subs_info *group; |
| struct list_head *p; |
| int i; |
| |
| if (copy_from_user(&subs, arg, sizeof(subs))) |
| return -EFAULT; |
| |
| if ((cptr = snd_seq_client_use_ptr(subs.root.client)) == NULL) |
| goto __end; |
| if ((port = snd_seq_port_use_ptr(cptr, subs.root.port)) == NULL) |
| goto __end; |
| |
| switch (subs.type) { |
| case SNDRV_SEQ_QUERY_SUBS_READ: |
| group = &port->c_src; |
| break; |
| case SNDRV_SEQ_QUERY_SUBS_WRITE: |
| group = &port->c_dest; |
| break; |
| default: |
| goto __end; |
| } |
| |
| down_read(&group->list_mutex); |
| /* search for the subscriber */ |
| subs.num_subs = group->count; |
| i = 0; |
| result = -ENOENT; |
| list_for_each(p, &group->list_head) { |
| if (i++ == subs.index) { |
| /* found! */ |
| struct snd_seq_subscribers *s; |
| if (subs.type == SNDRV_SEQ_QUERY_SUBS_READ) { |
| s = list_entry(p, struct snd_seq_subscribers, src_list); |
| subs.addr = s->info.dest; |
| } else { |
| s = list_entry(p, struct snd_seq_subscribers, dest_list); |
| subs.addr = s->info.sender; |
| } |
| subs.flags = s->info.flags; |
| subs.queue = s->info.queue; |
| result = 0; |
| break; |
| } |
| } |
| up_read(&group->list_mutex); |
| |
| __end: |
| if (port) |
| snd_seq_port_unlock(port); |
| if (cptr) |
| snd_seq_client_unlock(cptr); |
| if (result >= 0) { |
| if (copy_to_user(arg, &subs, sizeof(subs))) |
| return -EFAULT; |
| } |
| return result; |
| } |
| |
| |
| /* |
| * query next client |
| */ |
| static int snd_seq_ioctl_query_next_client(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| struct snd_seq_client *cptr = NULL; |
| struct snd_seq_client_info info; |
| |
| if (copy_from_user(&info, arg, sizeof(info))) |
| return -EFAULT; |
| |
| /* search for next client */ |
| info.client++; |
| if (info.client < 0) |
| info.client = 0; |
| for (; info.client < SNDRV_SEQ_MAX_CLIENTS; info.client++) { |
| cptr = snd_seq_client_use_ptr(info.client); |
| if (cptr) |
| break; /* found */ |
| } |
| if (cptr == NULL) |
| return -ENOENT; |
| |
| get_client_info(cptr, &info); |
| snd_seq_client_unlock(cptr); |
| |
| if (copy_to_user(arg, &info, sizeof(info))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| /* |
| * query next port |
| */ |
| static int snd_seq_ioctl_query_next_port(struct snd_seq_client *client, |
| void __user *arg) |
| { |
| struct snd_seq_client *cptr; |
| struct snd_seq_client_port *port = NULL; |
| struct snd_seq_port_info info; |
| |
| if (copy_from_user(&info, arg, sizeof(info))) |
| return -EFAULT; |
| cptr = snd_seq_client_use_ptr(info.addr.client); |
| if (cptr == NULL) |
| return -ENXIO; |
| |
| /* search for next port */ |
| info.addr.port++; |
| port = snd_seq_port_query_nearest(cptr, &info); |
| if (port == NULL) { |
| snd_seq_client_unlock(cptr); |
| return -ENOENT; |
| } |
| |
| /* get port info */ |
| info.addr = port->addr; |
| snd_seq_get_port_info(port, &info); |
| snd_seq_port_unlock(port); |
| snd_seq_client_unlock(cptr); |
| |
| if (copy_to_user(arg, &info, sizeof(info))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| /* -------------------------------------------------------- */ |
| |
| static struct seq_ioctl_table { |
| unsigned int cmd; |
| int (*func)(struct snd_seq_client *client, void __user * arg); |
| } ioctl_tables[] = { |
| { SNDRV_SEQ_IOCTL_SYSTEM_INFO, snd_seq_ioctl_system_info }, |
| { SNDRV_SEQ_IOCTL_RUNNING_MODE, snd_seq_ioctl_running_mode }, |
| { SNDRV_SEQ_IOCTL_GET_CLIENT_INFO, snd_seq_ioctl_get_client_info }, |
| { SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, snd_seq_ioctl_set_client_info }, |
| { SNDRV_SEQ_IOCTL_CREATE_PORT, snd_seq_ioctl_create_port }, |
| { SNDRV_SEQ_IOCTL_DELETE_PORT, snd_seq_ioctl_delete_port }, |
| { SNDRV_SEQ_IOCTL_GET_PORT_INFO, snd_seq_ioctl_get_port_info }, |
| { SNDRV_SEQ_IOCTL_SET_PORT_INFO, snd_seq_ioctl_set_port_info }, |
| { SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, snd_seq_ioctl_subscribe_port }, |
| { SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, snd_seq_ioctl_unsubscribe_port }, |
| { SNDRV_SEQ_IOCTL_CREATE_QUEUE, snd_seq_ioctl_create_queue }, |
| { SNDRV_SEQ_IOCTL_DELETE_QUEUE, snd_seq_ioctl_delete_queue }, |
| { SNDRV_SEQ_IOCTL_GET_QUEUE_INFO, snd_seq_ioctl_get_queue_info }, |
| { SNDRV_SEQ_IOCTL_SET_QUEUE_INFO, snd_seq_ioctl_set_queue_info }, |
| { SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE, snd_seq_ioctl_get_named_queue }, |
| { SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS, snd_seq_ioctl_get_queue_status }, |
| { SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO, snd_seq_ioctl_get_queue_tempo }, |
| { SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO, snd_seq_ioctl_set_queue_tempo }, |
| { SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER, snd_seq_ioctl_get_queue_timer }, |
| { SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER, snd_seq_ioctl_set_queue_timer }, |
| { SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT, snd_seq_ioctl_get_queue_client }, |
| { SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT, snd_seq_ioctl_set_queue_client }, |
| { SNDRV_SEQ_IOCTL_GET_CLIENT_POOL, snd_seq_ioctl_get_client_pool }, |
| { SNDRV_SEQ_IOCTL_SET_CLIENT_POOL, snd_seq_ioctl_set_client_pool }, |
| { SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION, snd_seq_ioctl_get_subscription }, |
| { SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, snd_seq_ioctl_query_next_client }, |
| { SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, snd_seq_ioctl_query_next_port }, |
| { SNDRV_SEQ_IOCTL_REMOVE_EVENTS, snd_seq_ioctl_remove_events }, |
| { SNDRV_SEQ_IOCTL_QUERY_SUBS, snd_seq_ioctl_query_subs }, |
| { 0, NULL }, |
| }; |
| |
| static int snd_seq_do_ioctl(struct snd_seq_client *client, unsigned int cmd, |
| void __user *arg) |
| { |
| struct seq_ioctl_table *p; |
| |
| switch (cmd) { |
| case SNDRV_SEQ_IOCTL_PVERSION: |
| /* return sequencer version number */ |
| return put_user(SNDRV_SEQ_VERSION, (int __user *)arg) ? -EFAULT : 0; |
| case SNDRV_SEQ_IOCTL_CLIENT_ID: |
| /* return the id of this client */ |
| return put_user(client->number, (int __user *)arg) ? -EFAULT : 0; |
| } |
| |
| if (! arg) |
| return -EFAULT; |
| for (p = ioctl_tables; p->cmd; p++) { |
| if (p->cmd == cmd) |
| return p->func(client, arg); |
| } |
| snd_printd("seq unknown ioctl() 0x%x (type='%c', number=0x%2x)\n", |
| cmd, _IOC_TYPE(cmd), _IOC_NR(cmd)); |
| return -ENOTTY; |
| } |
| |
| |
| static long snd_seq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| { |
| struct snd_seq_client *client = file->private_data; |
| |
| snd_assert(client != NULL, return -ENXIO); |
| |
| return snd_seq_do_ioctl(client, cmd, (void __user *) arg); |
| } |
| |
| #ifdef CONFIG_COMPAT |
| #include "seq_compat.c" |
| #else |
| #define snd_seq_ioctl_compat NULL |
| #endif |
| |
| /* -------------------------------------------------------- */ |
| |
| |
| /* exported to kernel modules */ |
| int snd_seq_create_kernel_client(struct snd_card *card, int client_index, |
| struct snd_seq_client_callback *callback) |
| { |
| struct snd_seq_client *client; |
| |
| snd_assert(! in_interrupt(), return -EBUSY); |
| |
| if (callback == NULL) |
| return -EINVAL; |
| if (card && client_index > 7) |
| return -EINVAL; |
| if (card == NULL && client_index > 63) |
| return -EINVAL; |
| if (card) |
| client_index += 64 + (card->number << 3); |
| |
| if (down_interruptible(®ister_mutex)) |
| return -ERESTARTSYS; |
| /* empty write queue as default */ |
| client = seq_create_client1(client_index, 0); |
| if (client == NULL) { |
| up(®ister_mutex); |
| return -EBUSY; /* failure code */ |
| } |
| usage_alloc(&client_usage, 1); |
| |
| client->accept_input = callback->allow_output; |
| client->accept_output = callback->allow_input; |
| |
| /* fill client data */ |
| client->data.kernel.card = card; |
| client->data.kernel.private_data = callback->private_data; |
| sprintf(client->name, "Client-%d", client->number); |
| |
| client->type = KERNEL_CLIENT; |
| up(®ister_mutex); |
| |
| /* make others aware this new client */ |
| snd_seq_system_client_ev_client_start(client->number); |
| |
| /* return client number to caller */ |
| return client->number; |
| } |
| |
| /* exported to kernel modules */ |
| int snd_seq_delete_kernel_client(int client) |
| { |
| struct snd_seq_client *ptr; |
| |
| snd_assert(! in_interrupt(), return -EBUSY); |
| |
| ptr = clientptr(client); |
| if (ptr == NULL) |
| return -EINVAL; |
| |
| seq_free_client(ptr); |
| kfree(ptr); |
| return 0; |
| } |
| |
| |
| /* skeleton to enqueue event, called from snd_seq_kernel_client_enqueue |
| * and snd_seq_kernel_client_enqueue_blocking |
| */ |
| static int kernel_client_enqueue(int client, struct snd_seq_event *ev, |
| struct file *file, int blocking, |
| int atomic, int hop) |
| { |
| struct snd_seq_client *cptr; |
| int result; |
| |
| snd_assert(ev != NULL, return -EINVAL); |
| |
| if (ev->type == SNDRV_SEQ_EVENT_NONE) |
| return 0; /* ignore this */ |
| if (ev->type == SNDRV_SEQ_EVENT_KERNEL_ERROR) |
| return -EINVAL; /* quoted events can't be enqueued */ |
| |
| /* fill in client number */ |
| ev->source.client = client; |
| |
| if (check_event_type_and_length(ev)) |
| return -EINVAL; |
| |
| cptr = snd_seq_client_use_ptr(client); |
| if (cptr == NULL) |
| return -EINVAL; |
| |
| if (! cptr->accept_output) |
| result = -EPERM; |
| else /* send it */ |
| result = snd_seq_client_enqueue_event(cptr, ev, file, blocking, atomic, hop); |
| |
| snd_seq_client_unlock(cptr); |
| return result; |
| } |
| |
| /* |
| * exported, called by kernel clients to enqueue events (w/o blocking) |
| * |
| * RETURN VALUE: zero if succeed, negative if error |
| */ |
| int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event * ev, |
| int atomic, int hop) |
| { |
| return kernel_client_enqueue(client, ev, NULL, 0, atomic, hop); |
| } |
| |
| /* |
| * exported, called by kernel clients to enqueue events (with blocking) |
| * |
| * RETURN VALUE: zero if succeed, negative if error |
| */ |
| int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev, |
| struct file *file, |
| int atomic, int hop) |
| { |
| return kernel_client_enqueue(client, ev, file, 1, atomic, hop); |
| } |
| |
| |
| /* |
| * exported, called by kernel clients to dispatch events directly to other |
| * clients, bypassing the queues. Event time-stamp will be updated. |
| * |
| * RETURN VALUE: negative = delivery failed, |
| * zero, or positive: the number of delivered events |
| */ |
| int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event * ev, |
| int atomic, int hop) |
| { |
| struct snd_seq_client *cptr; |
| int result; |
| |
| snd_assert(ev != NULL, return -EINVAL); |
| |
| /* fill in client number */ |
| ev->queue = SNDRV_SEQ_QUEUE_DIRECT; |
| ev->source.client = client; |
| |
| if (check_event_type_and_length(ev)) |
| return -EINVAL; |
| |
| cptr = snd_seq_client_use_ptr(client); |
| if (cptr == NULL) |
| return -EINVAL; |
| |
| if (!cptr->accept_output) |
| result = -EPERM; |
| else |
| result = snd_seq_deliver_event(cptr, ev, atomic, hop); |
| |
| snd_seq_client_unlock(cptr); |
| return result; |
| } |
| |
| |
| /* |
| * exported, called by kernel clients to perform same functions as with |
| * userland ioctl() |
| */ |
| int snd_seq_kernel_client_ctl(int clientid, unsigned int cmd, void *arg) |
| { |
| struct snd_seq_client *client; |
| mm_segment_t fs; |
| int result; |
| |
| client = clientptr(clientid); |
| if (client == NULL) |
| return -ENXIO; |
| fs = snd_enter_user(); |
| result = snd_seq_do_ioctl(client, cmd, (void __user *)arg); |
| snd_leave_user(fs); |
| return result; |
| } |
| |
| |
| /* exported (for OSS emulator) */ |
| int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait) |
| { |
| struct snd_seq_client *client; |
| |
| client = clientptr(clientid); |
| if (client == NULL) |
| return -ENXIO; |
| |
| if (! snd_seq_write_pool_allocated(client)) |
| return 1; |
| if (snd_seq_pool_poll_wait(client->pool, file, wait)) |
| return 1; |
| return 0; |
| } |
| |
| /*---------------------------------------------------------------------------*/ |
| |
| /* |
| * /proc interface |
| */ |
| static void snd_seq_info_dump_subscribers(struct snd_info_buffer *buffer, |
| struct snd_seq_port_subs_info *group, |
| int is_src, char *msg) |
| { |
| struct list_head *p; |
| struct snd_seq_subscribers *s; |
| int count = 0; |
| |
| down_read(&group->list_mutex); |
| if (list_empty(&group->list_head)) { |
| up_read(&group->list_mutex); |
| return; |
| } |
| snd_iprintf(buffer, msg); |
| list_for_each(p, &group->list_head) { |
| if (is_src) |
| s = list_entry(p, struct snd_seq_subscribers, src_list); |
| else |
| s = list_entry(p, struct snd_seq_subscribers, dest_list); |
| if (count++) |
| snd_iprintf(buffer, ", "); |
| snd_iprintf(buffer, "%d:%d", |
| is_src ? s->info.dest.client : s->info.sender.client, |
| is_src ? s->info.dest.port : s->info.sender.port); |
| if (s->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP) |
| snd_iprintf(buffer, "[%c:%d]", ((s->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL) ? 'r' : 't'), s->info.queue); |
| if (group->exclusive) |
| snd_iprintf(buffer, "[ex]"); |
| } |
| up_read(&group->list_mutex); |
| snd_iprintf(buffer, "\n"); |
| } |
| |
| #define FLAG_PERM_RD(perm) ((perm) & SNDRV_SEQ_PORT_CAP_READ ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_READ ? 'R' : 'r') : '-') |
| #define FLAG_PERM_WR(perm) ((perm) & SNDRV_SEQ_PORT_CAP_WRITE ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_WRITE ? 'W' : 'w') : '-') |
| #define FLAG_PERM_EX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_NO_EXPORT ? '-' : 'e') |
| |
| #define FLAG_PERM_DUPLEX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_DUPLEX ? 'X' : '-') |
| |
| static void snd_seq_info_dump_ports(struct snd_info_buffer *buffer, |
| struct snd_seq_client *client) |
| { |
| struct list_head *l; |
| |
| down(&client->ports_mutex); |
| list_for_each(l, &client->ports_list_head) { |
| struct snd_seq_client_port *p = list_entry(l, struct snd_seq_client_port, list); |
| snd_iprintf(buffer, " Port %3d : \"%s\" (%c%c%c%c)\n", |
| p->addr.port, p->name, |
| FLAG_PERM_RD(p->capability), |
| FLAG_PERM_WR(p->capability), |
| FLAG_PERM_EX(p->capability), |
| FLAG_PERM_DUPLEX(p->capability)); |
| snd_seq_info_dump_subscribers(buffer, &p->c_src, 1, " Connecting To: "); |
| snd_seq_info_dump_subscribers(buffer, &p->c_dest, 0, " Connected From: "); |
| } |
| up(&client->ports_mutex); |
| } |
| |
| |
| void snd_seq_info_pool(struct snd_info_buffer *buffer, |
| struct snd_seq_pool *pool, char *space); |
| |
| /* exported to seq_info.c */ |
| void snd_seq_info_clients_read(struct snd_info_entry *entry, |
| struct snd_info_buffer *buffer) |
| { |
| int c; |
| struct snd_seq_client *client; |
| |
| snd_iprintf(buffer, "Client info\n"); |
| snd_iprintf(buffer, " cur clients : %d\n", client_usage.cur); |
| snd_iprintf(buffer, " peak clients : %d\n", client_usage.peak); |
| snd_iprintf(buffer, " max clients : %d\n", SNDRV_SEQ_MAX_CLIENTS); |
| snd_iprintf(buffer, "\n"); |
| |
| /* list the client table */ |
| for (c = 0; c < SNDRV_SEQ_MAX_CLIENTS; c++) { |
| client = snd_seq_client_use_ptr(c); |
| if (client == NULL) |
| continue; |
| if (client->type == NO_CLIENT) { |
| snd_seq_client_unlock(client); |
| continue; |
| } |
| |
| snd_iprintf(buffer, "Client %3d : \"%s\" [%s]\n", |
| c, client->name, |
| client->type == USER_CLIENT ? "User" : "Kernel"); |
| snd_seq_info_dump_ports(buffer, client); |
| if (snd_seq_write_pool_allocated(client)) { |
| snd_iprintf(buffer, " Output pool :\n"); |
| snd_seq_info_pool(buffer, client->pool, " "); |
| } |
| if (client->type == USER_CLIENT && client->data.user.fifo && |
| client->data.user.fifo->pool) { |
| snd_iprintf(buffer, " Input pool :\n"); |
| snd_seq_info_pool(buffer, client->data.user.fifo->pool, " "); |
| } |
| snd_seq_client_unlock(client); |
| } |
| } |
| |
| |
| /*---------------------------------------------------------------------------*/ |
| |
| |
| /* |
| * REGISTRATION PART |
| */ |
| |
| static struct file_operations snd_seq_f_ops = |
| { |
| .owner = THIS_MODULE, |
| .read = snd_seq_read, |
| .write = snd_seq_write, |
| .open = snd_seq_open, |
| .release = snd_seq_release, |
| .poll = snd_seq_poll, |
| .unlocked_ioctl = snd_seq_ioctl, |
| .compat_ioctl = snd_seq_ioctl_compat, |
| }; |
| |
| /* |
| * register sequencer device |
| */ |
| int __init snd_sequencer_device_init(void) |
| { |
| int err; |
| |
| if (down_interruptible(®ister_mutex)) |
| return -ERESTARTSYS; |
| |
| if ((err = snd_register_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0, |
| &snd_seq_f_ops, "seq")) < 0) { |
| up(®ister_mutex); |
| return err; |
| } |
| |
| up(®ister_mutex); |
| |
| return 0; |
| } |
| |
| |
| |
| /* |
| * unregister sequencer device |
| */ |
| void __exit snd_sequencer_device_done(void) |
| { |
| snd_unregister_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0); |
| } |