diff options
Diffstat (limited to 'sound/core/seq/seq_clientmgr.c')
| -rw-r--r-- | sound/core/seq/seq_clientmgr.c | 2503 |
1 files changed, 2503 insertions, 0 deletions
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c new file mode 100644 index 00000000000..d8f76afd284 --- /dev/null +++ b/sound/core/seq/seq_clientmgr.c @@ -0,0 +1,2503 @@ +/* + * 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 client_t *clienttab[SNDRV_SEQ_MAX_CLIENTS]; +static usage_t client_usage; + +/* + * prototypes + */ +static int bounce_error_event(client_t *client, snd_seq_event_t *event, int err, int atomic, int hop); +static int snd_seq_deliver_single_event(client_t *client, snd_seq_event_t *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(client_t *client) +{ + return snd_seq_total_cells(client->pool) > 0; +} + +/* return pointer to client structure for specified id */ +static client_t *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[]; + +client_t *snd_seq_client_use_ptr(int clientid) +{ + unsigned long flags; + client_t *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(usage_t * res, int num) +{ + res->cur += num; + if (res->cur > res->peak) + res->peak = res->cur; +} + +static void usage_free(usage_t * 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 client_t *seq_create_client1(int client_index, int poolsize) +{ + unsigned long flags; + int c; + client_t *client; + + /* init client data */ + client = kcalloc(1, 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(client_t *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(client_t * 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 */ + client_t *client; + user_client_t *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) +{ + client_t *client = (client_t *) 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) +{ + client_t *client = (client_t *) file->private_data; + fifo_t *fifo; + int err; + long result = 0; + snd_seq_event_cell_t *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(snd_seq_event_t)) { + 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)) { + snd_seq_event_t tmpev; + tmpev = cell->event; + tmpev.data.ext.len &= ~SNDRV_SEQ_EXT_MASK; + if (copy_to_user(buf, &tmpev, sizeof(snd_seq_event_t))) { + err = -EFAULT; + break; + } + count -= sizeof(snd_seq_event_t); + buf += sizeof(snd_seq_event_t); + err = snd_seq_expand_var_event(&cell->event, count, (char *)buf, 0, sizeof(snd_seq_event_t)); + if (err < 0) + break; + result += err; + count -= err; + buf += err; + } else { + if (copy_to_user(buf, &cell->event, sizeof(snd_seq_event_t))) { + err = -EFAULT; + break; + } + count -= sizeof(snd_seq_event_t); + buf += sizeof(snd_seq_event_t); + } + snd_seq_cell_free(cell); + cell = NULL; /* to be sure */ + result += sizeof(snd_seq_event_t); + } + + 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(client_port_t *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 client_t *get_event_dest_client(snd_seq_event_t *event, int filter) +{ + client_t *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(client_t *client, snd_seq_event_t *event, + int err, int atomic, int hop) +{ + snd_seq_event_t 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(snd_seq_event_t *event, int queue, int real_time) +{ + queue_t *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(client_t *client, + snd_seq_event_t *event, + int filter, int atomic, int hop) +{ + client_t *dest = NULL; + client_port_t *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(client_t *client, + snd_seq_event_t *event, + int atomic, int hop) +{ + subscribers_t *subs; + int err = 0, num_ev = 0; + snd_seq_event_t event_saved; + client_port_t *src_port; + struct list_head *p; + port_subs_info_t *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, subscribers_t, 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(client_t *client, + snd_seq_event_t *event, + int atomic, int hop) +{ + int num_ev = 0, err = 0; + client_t *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) { + client_port_t *port = list_entry(p, client_port_t, 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(client_t *client, + snd_seq_event_t *event, int atomic, int hop) +{ + int err = 0, num_ev = 0; + int dest; + snd_seq_addr_t 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(client_t *client, snd_seq_event_t *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(client_t *client, snd_seq_event_t *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(snd_seq_event_cell_t *cell, int atomic, int hop) +{ + client_t *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. + */ + snd_seq_event_t 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(client_t *client, + snd_seq_event_t *event, + struct file *file, int blocking, + int atomic, int hop) +{ + snd_seq_event_cell_t *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 */ + client_port_t *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(snd_seq_event_t *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) +{ + client_t *client = (client_t *) file->private_data; + int written = 0, len; + int err = -EINVAL; + snd_seq_event_t 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(snd_seq_event_t)) { + /* 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*)buf + sizeof(snd_seq_event_t); + 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) +{ + client_t *client = (client_t *) 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(client_t *client, void __user *arg) +{ + snd_seq_system_info_t 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(client_t *client, void __user *arg) +{ + struct sndrv_seq_running_info info; + client_t *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(client_t *cptr, snd_seq_client_info_t *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(client_t * client, void __user *arg) +{ + client_t *cptr; + snd_seq_client_info_t 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(client_t * client, void __user *arg) +{ + snd_seq_client_info_t 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(client_t * client, void __user *arg) +{ + client_port_t *port; + snd_seq_port_info_t info; + snd_seq_port_callback_t *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(client_t * client, void __user *arg) +{ + snd_seq_port_info_t 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(client_t *client, void __user *arg) +{ + client_t *cptr; + client_port_t *port; + snd_seq_port_info_t 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(client_t * client, void __user *arg) +{ + client_port_t *port; + snd_seq_port_info_t 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(client_t *client, client_port_t *sport, + client_port_t *dport, + snd_seq_port_subscribe_t *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, + snd_seq_port_subscribe_t *info, int evtype) +{ + snd_seq_event_t 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(client_t * client, void __user *arg) +{ + int result = -EINVAL; + client_t *receiver = NULL, *sender = NULL; + client_port_t *sport = NULL, *dport = NULL; + snd_seq_port_subscribe_t 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(client_t * client, void __user *arg) +{ + int result = -ENXIO; + client_t *receiver = NULL, *sender = NULL; + client_port_t *sport = NULL, *dport = NULL; + snd_seq_port_subscribe_t 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(client_t *client, void __user *arg) +{ + snd_seq_queue_info_t info; + int result; + queue_t *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(client_t *client, void __user *arg) +{ + snd_seq_queue_info_t 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(client_t *client, void __user *arg) +{ + snd_seq_queue_info_t info; + queue_t *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(client_t *client, void __user *arg) +{ + snd_seq_queue_info_t info; + queue_t *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(client_t *client, void __user *arg) +{ + snd_seq_queue_info_t info; + queue_t *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(client_t * client, void __user *arg) +{ + snd_seq_queue_status_t status; + queue_t *queue; + seq_timer_t *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(client_t * client, void __user *arg) +{ + snd_seq_queue_tempo_t tempo; + queue_t *queue; + seq_timer_t *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, snd_seq_queue_tempo_t *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(client_t * client, void __user *arg) +{ + int result; + snd_seq_queue_tempo_t 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(client_t * client, void __user *arg) +{ + snd_seq_queue_timer_t timer; + queue_t *queue; + seq_timer_t *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(client_t * client, void __user *arg) +{ + int result = 0; + snd_seq_queue_timer_t 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)) { + queue_t *q; + seq_timer_t *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(client_t * client, void __user *arg) +{ + snd_seq_queue_client_t 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(client_t * client, void __user *arg) +{ + int err; + snd_seq_queue_client_t 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(client_t * client, void __user *arg) +{ + snd_seq_client_pool_t info; + client_t *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(client_t * client, void __user *arg) +{ + snd_seq_client_pool_t 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(client_t * client, void __user *arg) +{ + snd_seq_remove_events_t 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(client_t *client, void __user *arg) +{ + int result; + client_t *sender = NULL; + client_port_t *sport = NULL; + snd_seq_port_subscribe_t subs; + subscribers_t *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(client_t *client, void __user *arg) +{ + int result = -ENXIO; + client_t *cptr = NULL; + client_port_t *port = NULL; + snd_seq_query_subs_t subs; + port_subs_info_t *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! */ + subscribers_t *s; + if (subs.type == SNDRV_SEQ_QUERY_SUBS_READ) { + s = list_entry(p, subscribers_t, src_list); + subs.addr = s->info.dest; + } else { + s = list_entry(p, subscribers_t, 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(client_t *client, void __user *arg) +{ + client_t *cptr = NULL; + snd_seq_client_info_t 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(client_t *client, void __user *arg) +{ + client_t *cptr; + client_port_t *port = NULL; + snd_seq_port_info_t 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)(client_t *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(client_t *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) +{ + client_t *client = (client_t *) 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(snd_card_t *card, int client_index, snd_seq_client_callback_t * callback) +{ + client_t *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) +{ + client_t *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, snd_seq_event_t *ev, + struct file *file, int blocking, + int atomic, int hop) +{ + client_t *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, snd_seq_event_t * 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, snd_seq_event_t * 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, snd_seq_event_t * ev, + int atomic, int hop) +{ + client_t *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) +{ + client_t *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) +{ + client_t *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(snd_info_buffer_t *buffer, port_subs_info_t *group, int is_src, char *msg) +{ + struct list_head *p; + subscribers_t *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, subscribers_t, src_list); + else + s = list_entry(p, subscribers_t, 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(snd_info_buffer_t *buffer, client_t *client) +{ + struct list_head *l; + + down(&client->ports_mutex); + list_for_each(l, &client->ports_list_head) { + client_port_t *p = list_entry(l, client_port_t, 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); +} + + +/* exported to seq_info.c */ +void snd_seq_info_clients_read(snd_info_entry_t *entry, + snd_info_buffer_t * buffer) +{ + extern void snd_seq_info_pool(snd_info_buffer_t * buffer, pool_t * pool, char *space); + int c; + client_t *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, +}; + +static snd_minor_t snd_seq_reg = +{ + .comment = "sequencer", + .f_ops = &snd_seq_f_ops, +}; + + +/* + * 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_reg, "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); +} |