snd_emux_port_t *
snd_emux_create_port(snd_emux_t *emu, char *name,
int max_channels, int oss_port,
snd_seq_port_callback_t *callback)
{
snd_emux_port_t *p;
int i, type, cap;
/* Allocate structures for this channel */
if ((p = snd_magic_kcalloc(snd_emux_port_t, 0, GFP_KERNEL)) == NULL) {
snd_printk("no memory\n");
return NULL;
}
p->chset.channels = snd_kcalloc(max_channels * sizeof(snd_midi_channel_t), GFP_KERNEL);
if (p->chset.channels == NULL) {
snd_printk("no memory\n");
snd_magic_kfree(p);
return NULL;
}
for (i = 0; i < max_channels; i++)
p->chset.channels[i].number = i;
p->chset.private_data = p;
p->chset.max_channels = max_channels;
p->emu = emu;
p->chset.client = emu->client;
#ifdef SNDRV_EMUX_USE_RAW_EFFECT
snd_emux_create_effect(p);
#endif
callback->private_free = free_port;
callback->private_data = p;
cap = SNDRV_SEQ_PORT_CAP_WRITE;
if (oss_port) {
type = SNDRV_SEQ_PORT_TYPE_SPECIFIC;
} else {
type = DEFAULT_MIDI_TYPE;
cap |= SNDRV_SEQ_PORT_CAP_SUBS_WRITE;
}
p->chset.port = snd_seq_event_port_attach(emu->client, callback,
cap, type, max_channels,
emu->max_voices, name);
return p;
}
static int snd_info_entry_open(struct inode *inode, struct file *file)
{
snd_info_entry_t *entry;
snd_info_private_data_t *data;
snd_info_buffer_t *buffer;
struct proc_dir_entry *p;
int mode, err;
down(&info_mutex);
p = (struct proc_dir_entry *) inode->u.generic_ip;
entry = p == NULL ? NULL : (snd_info_entry_t *)p->data;
if (entry == NULL) {
up(&info_mutex);
return -ENODEV;
}
#ifndef LINUX_2_3
MOD_INC_USE_COUNT;
#endif
if (entry->module && !try_inc_mod_count(entry->module)) {
err = -EFAULT;
goto __error1;
}
mode = file->f_flags & O_ACCMODE;
if (mode == O_RDONLY || mode == O_RDWR) {
if ((entry->content == SNDRV_INFO_CONTENT_TEXT &&
!entry->c.text.read_size) ||
(entry->content == SNDRV_INFO_CONTENT_DATA &&
entry->c.ops->read == NULL) ||
entry->content == SNDRV_INFO_CONTENT_DEVICE) {
err = -ENODEV;
goto __error;
}
}
if (mode == O_WRONLY || mode == O_RDWR) {
if ((entry->content == SNDRV_INFO_CONTENT_TEXT &&
!entry->c.text.write_size) ||
(entry->content == SNDRV_INFO_CONTENT_DATA &&
entry->c.ops->write == NULL) ||
entry->content == SNDRV_INFO_CONTENT_DEVICE) {
err = -ENODEV;
goto __error;
}
}
data = snd_magic_kcalloc(snd_info_private_data_t, 0, GFP_KERNEL);
if (data == NULL) {
err = -ENOMEM;
goto __error;
}
data->entry = entry;
switch (entry->content) {
case SNDRV_INFO_CONTENT_TEXT:
if (mode == O_RDONLY || mode == O_RDWR) {
buffer = (snd_info_buffer_t *)
snd_kcalloc(sizeof(snd_info_buffer_t), GFP_KERNEL);
if (buffer == NULL) {
snd_magic_kfree(data);
err = -ENOMEM;
goto __error;
}
buffer->len = (entry->c.text.read_size +
(PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
buffer->buffer = vmalloc(buffer->len);
if (buffer->buffer == NULL) {
kfree(buffer);
snd_magic_kfree(data);
err = -ENOMEM;
goto __error;
}
buffer->curr = buffer->buffer;
data->rbuffer = buffer;
}
if (mode == O_WRONLY || mode == O_RDWR) {
buffer = (snd_info_buffer_t *)
snd_kcalloc(sizeof(snd_info_buffer_t), GFP_KERNEL);
if (buffer == NULL) {
if (mode == O_RDWR) {
vfree(data->rbuffer->buffer);
kfree(data->rbuffer);
}
snd_magic_kfree(data);
err = -ENOMEM;
goto __error;
}
buffer->len = (entry->c.text.write_size +
(PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
buffer->buffer = vmalloc(buffer->len);
if (buffer->buffer == NULL) {
if (mode == O_RDWR) {
vfree(data->rbuffer->buffer);
kfree(data->rbuffer);
}
kfree(buffer);
snd_magic_kfree(data);
err = -ENOMEM;
goto __error;
}
buffer->curr = buffer->buffer;
data->wbuffer = buffer;
}
break;
case SNDRV_INFO_CONTENT_DATA: /* data */
if (entry->c.ops->open) {
if ((err = entry->c.ops->open(entry, mode,
&data->file_private_data)) < 0) {
snd_magic_kfree(data);
goto __error;
}
}
break;
}
file->private_data = data;
up(&info_mutex);
if (entry->content == SNDRV_INFO_CONTENT_TEXT &&
(mode == O_RDONLY || mode == O_RDWR)) {
if (entry->c.text.read) {
down(&entry->access);
entry->c.text.read(entry, data->rbuffer);
up(&entry->access);
}
}
return 0;
__error:
dec_mod_count(entry->module);
__error1:
#ifndef LINUX_2_3
MOD_DEC_USE_COUNT;
#endif
up(&info_mutex);
return err;
}