mirror of https://gitee.com/openkylin/linux.git
[ALSA] Clean up PCM codes (take 2)
- Clean up initialization and destruction of substream instance Now snd_pcm_open_substream() alone does most initialization jobs. Add pcm_release callback for cleaning up at snd_pcm_release_substream() - Tidy up PCM oss code Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
Jaroslav Kysela
parent
bf1bbb5a49
commit
3bf75f9b90
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@ -369,6 +369,7 @@ struct snd_pcm_substream {
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/* -- assigned files -- */
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struct snd_pcm_file *file;
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struct file *ffile;
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void (*pcm_release)(struct snd_pcm_substream *);
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#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
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/* -- OSS things -- */
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struct snd_pcm_oss_substream oss;
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@ -381,13 +382,10 @@ struct snd_pcm_substream {
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struct snd_info_entry *proc_prealloc_entry;
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/* misc flags */
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unsigned int no_mmap_ctrl: 1;
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unsigned int hw_opened: 1;
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};
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#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
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#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL || ((substream)->oss.file != NULL))
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#else
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#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL)
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#endif
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struct snd_pcm_str {
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@ -468,8 +466,12 @@ int snd_pcm_suspend(struct snd_pcm_substream *substream);
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int snd_pcm_suspend_all(struct snd_pcm *pcm);
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#endif
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int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
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int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct snd_pcm_substream **rsubstream);
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int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file,
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struct snd_pcm_substream **rsubstream);
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void snd_pcm_release_substream(struct snd_pcm_substream *substream);
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int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file,
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struct snd_pcm_substream **rsubstream);
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void snd_pcm_detach_substream(struct snd_pcm_substream *substream);
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void snd_pcm_vma_notify_data(void *client, void *data);
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int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
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@ -70,7 +70,6 @@ struct snd_pcm_oss_file {
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struct snd_pcm_oss_substream {
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unsigned oss: 1; /* oss mode */
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struct snd_pcm_oss_setup *setup; /* active setup */
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struct snd_pcm_oss_file *file;
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};
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struct snd_pcm_oss_stream {
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@ -1671,6 +1671,18 @@ static struct snd_pcm_oss_setup *snd_pcm_oss_look_for_setup(struct snd_pcm *pcm,
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return NULL;
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}
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static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime;
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runtime = substream->runtime;
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vfree(runtime->oss.buffer);
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runtime->oss.buffer = NULL;
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#ifdef CONFIG_SND_PCM_OSS_PLUGINS
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snd_pcm_oss_plugin_clear(substream);
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#endif
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substream->oss.oss = 0;
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}
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static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
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struct snd_pcm_oss_setup *setup,
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int minor)
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@ -1679,6 +1691,10 @@ static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
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substream->oss.oss = 1;
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substream->oss.setup = setup;
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if (setup->nonblock)
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substream->ffile->f_flags |= O_NONBLOCK;
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else
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substream->ffile->f_flags &= ~O_NONBLOCK;
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runtime = substream->runtime;
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runtime->oss.params = 1;
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runtime->oss.trigger = 1;
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@ -1697,18 +1713,7 @@ static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
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runtime->oss.fragshift = 0;
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runtime->oss.maxfrags = 0;
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runtime->oss.subdivision = 0;
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}
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static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime;
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runtime = substream->runtime;
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vfree(runtime->oss.buffer);
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#ifdef CONFIG_SND_PCM_OSS_PLUGINS
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snd_pcm_oss_plugin_clear(substream);
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#endif
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substream->oss.file = NULL;
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substream->oss.oss = 0;
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substream->pcm_release = snd_pcm_oss_release_substream;
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}
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static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
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@ -1717,23 +1722,8 @@ static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
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snd_assert(pcm_oss_file != NULL, return -ENXIO);
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for (cidx = 0; cidx < 2; ++cidx) {
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struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
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struct snd_pcm_runtime *runtime;
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if (substream == NULL)
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continue;
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runtime = substream->runtime;
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snd_pcm_stream_lock_irq(substream);
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if (snd_pcm_running(substream))
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snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
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snd_pcm_stream_unlock_irq(substream);
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if (substream->ffile != NULL) {
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if (substream->ops->hw_free != NULL)
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substream->ops->hw_free(substream);
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substream->ops->close(substream);
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substream->ffile = NULL;
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}
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snd_pcm_oss_release_substream(substream);
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snd_pcm_release_substream(substream);
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if (substream)
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snd_pcm_release_substream(substream);
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}
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kfree(pcm_oss_file);
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return 0;
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@ -1743,12 +1733,11 @@ static int snd_pcm_oss_open_file(struct file *file,
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struct snd_pcm *pcm,
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struct snd_pcm_oss_file **rpcm_oss_file,
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int minor,
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struct snd_pcm_oss_setup *psetup,
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struct snd_pcm_oss_setup *csetup)
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struct snd_pcm_oss_setup **setup)
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{
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int err = 0;
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int idx, err;
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struct snd_pcm_oss_file *pcm_oss_file;
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struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
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struct snd_pcm_substream *substream;
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unsigned int f_mode = file->f_mode;
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snd_assert(rpcm_oss_file != NULL, return -EINVAL);
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@ -1761,73 +1750,31 @@ static int snd_pcm_oss_open_file(struct file *file,
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if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
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(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
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f_mode = FMODE_WRITE;
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if ((f_mode & FMODE_WRITE) && !(psetup && psetup->disable)) {
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if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_PLAYBACK,
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&psubstream)) < 0) {
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for (idx = 0; idx < 2; idx++) {
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if (! setup[idx] || setup[idx]->disable)
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continue;
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if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
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if (! (f_mode & FMODE_WRITE))
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continue;
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} else {
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if (! (f_mode & FMODE_READ))
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continue;
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}
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err = snd_pcm_open_substream(pcm, idx, file, &substream);
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if (err < 0) {
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snd_pcm_oss_release_file(pcm_oss_file);
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return err;
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}
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pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK] = psubstream;
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}
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if ((f_mode & FMODE_READ) && !(csetup && csetup->disable)) {
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if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_CAPTURE,
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&csubstream)) < 0) {
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if (!(f_mode & FMODE_WRITE) || err != -ENODEV) {
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snd_pcm_oss_release_file(pcm_oss_file);
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return err;
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} else {
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csubstream = NULL;
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}
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}
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pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE] = csubstream;
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pcm_oss_file->streams[idx] = substream;
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snd_pcm_oss_init_substream(substream, setup[idx], minor);
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}
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if (psubstream == NULL && csubstream == NULL) {
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if (! pcm_oss_file->streams[0] && pcm_oss_file->streams[1]) {
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snd_pcm_oss_release_file(pcm_oss_file);
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return -EINVAL;
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}
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if (psubstream != NULL) {
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psubstream->oss.file = pcm_oss_file;
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err = snd_pcm_hw_constraints_init(psubstream);
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if (err < 0) {
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snd_printd("snd_pcm_hw_constraint_init failed\n");
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snd_pcm_oss_release_file(pcm_oss_file);
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return err;
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}
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if ((err = psubstream->ops->open(psubstream)) < 0) {
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snd_pcm_oss_release_file(pcm_oss_file);
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return err;
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}
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psubstream->ffile = file;
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err = snd_pcm_hw_constraints_complete(psubstream);
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if (err < 0) {
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snd_printd("snd_pcm_hw_constraint_complete failed\n");
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snd_pcm_oss_release_file(pcm_oss_file);
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return err;
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}
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snd_pcm_oss_init_substream(psubstream, psetup, minor);
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}
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if (csubstream != NULL) {
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csubstream->oss.file = pcm_oss_file;
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err = snd_pcm_hw_constraints_init(csubstream);
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if (err < 0) {
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snd_printd("snd_pcm_hw_constraint_init failed\n");
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snd_pcm_oss_release_file(pcm_oss_file);
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return err;
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}
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if ((err = csubstream->ops->open(csubstream)) < 0) {
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snd_pcm_oss_release_file(pcm_oss_file);
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return err;
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}
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csubstream->ffile = file;
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err = snd_pcm_hw_constraints_complete(csubstream);
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if (err < 0) {
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snd_printd("snd_pcm_hw_constraint_complete failed\n");
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snd_pcm_oss_release_file(pcm_oss_file);
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return err;
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}
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snd_pcm_oss_init_substream(csubstream, csetup, minor);
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}
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file->private_data = pcm_oss_file;
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*rpcm_oss_file = pcm_oss_file;
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@ -1852,7 +1799,7 @@ static int snd_pcm_oss_open(struct inode *inode, struct file *file)
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char task_name[32];
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struct snd_pcm *pcm;
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struct snd_pcm_oss_file *pcm_oss_file;
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struct snd_pcm_oss_setup *psetup = NULL, *csetup = NULL;
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struct snd_pcm_oss_setup *setup[2];
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int nonblock;
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wait_queue_t wait;
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@ -1873,23 +1820,13 @@ static int snd_pcm_oss_open(struct inode *inode, struct file *file)
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err = -EFAULT;
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goto __error;
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}
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memset(setup, 0, sizeof(*setup));
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if (file->f_mode & FMODE_WRITE)
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psetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, task_name);
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setup[0] = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, task_name);
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if (file->f_mode & FMODE_READ)
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csetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, task_name);
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setup[1] = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, task_name);
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nonblock = !!(file->f_flags & O_NONBLOCK);
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if (psetup && !psetup->disable) {
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if (psetup->nonblock)
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nonblock = 1;
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else if (psetup->block)
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nonblock = 0;
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} else if (csetup && !csetup->disable) {
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if (csetup->nonblock)
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nonblock = 1;
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else if (csetup->block)
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nonblock = 0;
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}
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if (!nonblock)
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nonblock = nonblock_open;
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@ -1898,7 +1835,7 @@ static int snd_pcm_oss_open(struct inode *inode, struct file *file)
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mutex_lock(&pcm->open_mutex);
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while (1) {
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err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
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iminor(inode), psetup, csetup);
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iminor(inode), setup);
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if (err >= 0)
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break;
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if (err == -EAGAIN) {
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@ -777,8 +777,9 @@ static void snd_pcm_tick_timer_func(unsigned long data)
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snd_pcm_tick_elapsed(substream);
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}
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int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
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struct snd_pcm_substream **rsubstream)
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int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream,
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struct file *file,
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struct snd_pcm_substream **rsubstream)
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{
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struct snd_pcm_str * pstr;
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struct snd_pcm_substream *substream;
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@ -793,7 +794,7 @@ int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
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*rsubstream = NULL;
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snd_assert(pcm != NULL, return -ENXIO);
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pstr = &pcm->streams[stream];
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if (pstr->substream == NULL)
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if (pstr->substream == NULL || pstr->substream_count == 0)
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return -ENODEV;
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card = pcm->card;
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@ -807,8 +808,6 @@ int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
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}
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up_read(&card->controls_rwsem);
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if (pstr->substream_count == 0)
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return -ENODEV;
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switch (stream) {
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case SNDRV_PCM_STREAM_PLAYBACK:
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if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) {
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@ -874,12 +873,13 @@ int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
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substream->runtime = runtime;
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substream->private_data = pcm->private_data;
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substream->ffile = file;
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pstr->substream_opened++;
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*rsubstream = substream;
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return 0;
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}
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void snd_pcm_release_substream(struct snd_pcm_substream *substream)
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void snd_pcm_detach_substream(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime;
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substream->file = NULL;
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@ -2299,19 +2299,7 @@ snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const v
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if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
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return -EBADFD;
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snd_assert(substream->ffile != NULL, return -ENXIO);
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nonblock = !!(substream->ffile->f_flags & O_NONBLOCK);
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#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
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if (substream->oss.oss) {
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struct snd_pcm_oss_setup *setup = substream->oss.setup;
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if (setup != NULL) {
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if (setup->nonblock)
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nonblock = 1;
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else if (setup->block)
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nonblock = 0;
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}
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}
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#endif
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if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED &&
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runtime->channels > 1)
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@ -2374,19 +2362,7 @@ snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
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if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
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return -EBADFD;
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snd_assert(substream->ffile != NULL, return -ENXIO);
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nonblock = !!(substream->ffile->f_flags & O_NONBLOCK);
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#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
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if (substream->oss.oss) {
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struct snd_pcm_oss_setup *setup = substream->oss.setup;
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if (setup != NULL) {
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if (setup->nonblock)
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nonblock = 1;
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else if (setup->block)
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nonblock = 0;
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}
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}
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#endif
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if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
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return -EINVAL;
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@ -2596,19 +2572,7 @@ snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __u
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if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
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return -EBADFD;
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snd_assert(substream->ffile != NULL, return -ENXIO);
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nonblock = !!(substream->ffile->f_flags & O_NONBLOCK);
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#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
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if (substream->oss.oss) {
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struct snd_pcm_oss_setup *setup = substream->oss.setup;
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if (setup != NULL) {
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if (setup->nonblock)
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nonblock = 1;
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else if (setup->block)
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nonblock = 0;
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}
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}
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#endif
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if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED)
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return -EINVAL;
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return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer);
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@ -2665,20 +2629,7 @@ snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
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if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
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return -EBADFD;
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snd_assert(substream->ffile != NULL, return -ENXIO);
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nonblock = !!(substream->ffile->f_flags & O_NONBLOCK);
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#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
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if (substream->oss.oss) {
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struct snd_pcm_oss_setup *setup = substream->oss.setup;
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if (setup != NULL) {
|
||||
if (setup->nonblock)
|
||||
nonblock = 1;
|
||||
else if (setup->block)
|
||||
nonblock = 0;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
|
||||
return -EINVAL;
|
||||
return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer);
|
||||
|
|
|
|||
|
|
@ -1995,28 +1995,63 @@ static void snd_pcm_remove_file(struct snd_pcm_str *str,
|
|||
}
|
||||
}
|
||||
|
||||
static int snd_pcm_release_file(struct snd_pcm_file * pcm_file)
|
||||
static void pcm_release_private(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct snd_pcm_substream *substream;
|
||||
struct snd_pcm_runtime *runtime;
|
||||
struct snd_pcm_str * str;
|
||||
struct snd_pcm_file *pcm_file = substream->file;
|
||||
|
||||
snd_assert(pcm_file != NULL, return -ENXIO);
|
||||
substream = pcm_file->substream;
|
||||
snd_assert(substream != NULL, return -ENXIO);
|
||||
runtime = substream->runtime;
|
||||
str = substream->pstr;
|
||||
snd_pcm_unlink(substream);
|
||||
if (substream->ffile != NULL) {
|
||||
snd_pcm_remove_file(substream->pstr, pcm_file);
|
||||
kfree(pcm_file);
|
||||
}
|
||||
|
||||
void snd_pcm_release_substream(struct snd_pcm_substream *substream)
|
||||
{
|
||||
snd_pcm_drop(substream);
|
||||
if (substream->pcm_release)
|
||||
substream->pcm_release(substream);
|
||||
if (substream->hw_opened) {
|
||||
if (substream->ops->hw_free != NULL)
|
||||
substream->ops->hw_free(substream);
|
||||
substream->ops->close(substream);
|
||||
substream->ffile = NULL;
|
||||
substream->hw_opened = 0;
|
||||
}
|
||||
snd_pcm_remove_file(str, pcm_file);
|
||||
snd_pcm_release_substream(substream);
|
||||
kfree(pcm_file);
|
||||
snd_pcm_detach_substream(substream);
|
||||
}
|
||||
|
||||
int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
|
||||
struct file *file,
|
||||
struct snd_pcm_substream **rsubstream)
|
||||
{
|
||||
struct snd_pcm_substream *substream;
|
||||
int err;
|
||||
|
||||
err = snd_pcm_attach_substream(pcm, stream, file, &substream);
|
||||
if (err < 0)
|
||||
return err;
|
||||
substream->no_mmap_ctrl = 0;
|
||||
err = snd_pcm_hw_constraints_init(substream);
|
||||
if (err < 0) {
|
||||
snd_printd("snd_pcm_hw_constraints_init failed\n");
|
||||
goto error;
|
||||
}
|
||||
|
||||
if ((err = substream->ops->open(substream)) < 0)
|
||||
goto error;
|
||||
|
||||
substream->hw_opened = 1;
|
||||
|
||||
err = snd_pcm_hw_constraints_complete(substream);
|
||||
if (err < 0) {
|
||||
snd_printd("snd_pcm_hw_constraints_complete failed\n");
|
||||
goto error;
|
||||
}
|
||||
|
||||
*rsubstream = substream;
|
||||
return 0;
|
||||
|
||||
error:
|
||||
snd_pcm_release_substream(substream);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int snd_pcm_open_file(struct file *file,
|
||||
|
|
@ -2024,52 +2059,29 @@ static int snd_pcm_open_file(struct file *file,
|
|||
int stream,
|
||||
struct snd_pcm_file **rpcm_file)
|
||||
{
|
||||
int err = 0;
|
||||
struct snd_pcm_file *pcm_file;
|
||||
struct snd_pcm_substream *substream;
|
||||
struct snd_pcm_str *str;
|
||||
int err;
|
||||
|
||||
snd_assert(rpcm_file != NULL, return -EINVAL);
|
||||
*rpcm_file = NULL;
|
||||
|
||||
err = snd_pcm_open_substream(pcm, stream, file, &substream);
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
|
||||
if (pcm_file == NULL) {
|
||||
snd_pcm_release_substream(substream);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
if ((err = snd_pcm_open_substream(pcm, stream, &substream)) < 0) {
|
||||
kfree(pcm_file);
|
||||
return err;
|
||||
}
|
||||
|
||||
str = substream->pstr;
|
||||
substream->file = pcm_file;
|
||||
substream->no_mmap_ctrl = 0;
|
||||
|
||||
substream->pcm_release = pcm_release_private;
|
||||
pcm_file->substream = substream;
|
||||
|
||||
snd_pcm_add_file(str, pcm_file);
|
||||
|
||||
err = snd_pcm_hw_constraints_init(substream);
|
||||
if (err < 0) {
|
||||
snd_printd("snd_pcm_hw_constraints_init failed\n");
|
||||
snd_pcm_release_file(pcm_file);
|
||||
return err;
|
||||
}
|
||||
|
||||
if ((err = substream->ops->open(substream)) < 0) {
|
||||
snd_pcm_release_file(pcm_file);
|
||||
return err;
|
||||
}
|
||||
substream->ffile = file;
|
||||
|
||||
err = snd_pcm_hw_constraints_complete(substream);
|
||||
if (err < 0) {
|
||||
snd_printd("snd_pcm_hw_constraints_complete failed\n");
|
||||
snd_pcm_release_file(pcm_file);
|
||||
return err;
|
||||
}
|
||||
|
||||
file->private_data = pcm_file;
|
||||
*rpcm_file = pcm_file;
|
||||
return 0;
|
||||
|
|
@ -2158,10 +2170,9 @@ static int snd_pcm_release(struct inode *inode, struct file *file)
|
|||
snd_assert(substream != NULL, return -ENXIO);
|
||||
snd_assert(!atomic_read(&substream->runtime->mmap_count), );
|
||||
pcm = substream->pcm;
|
||||
snd_pcm_drop(substream);
|
||||
fasync_helper(-1, file, 0, &substream->runtime->fasync);
|
||||
mutex_lock(&pcm->open_mutex);
|
||||
snd_pcm_release_file(pcm_file);
|
||||
snd_pcm_release_substream(substream);
|
||||
mutex_unlock(&pcm->open_mutex);
|
||||
wake_up(&pcm->open_wait);
|
||||
module_put(pcm->card->module);
|
||||
|
|
@ -2480,11 +2491,6 @@ static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
|
|||
return 0;
|
||||
}
|
||||
|
||||
static int snd_pcm_playback_ioctl1(struct snd_pcm_substream *substream,
|
||||
unsigned int cmd, void __user *arg);
|
||||
static int snd_pcm_capture_ioctl1(struct snd_pcm_substream *substream,
|
||||
unsigned int cmd, void __user *arg);
|
||||
|
||||
static int snd_pcm_common_ioctl1(struct snd_pcm_substream *substream,
|
||||
unsigned int cmd, void __user *arg)
|
||||
{
|
||||
|
|
|
|||
Loading…
Reference in New Issue