cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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seq_virmidi.h (2123B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2#ifndef __SOUND_SEQ_VIRMIDI_H
      3#define __SOUND_SEQ_VIRMIDI_H
      4
      5/*
      6 *  Virtual Raw MIDI client on Sequencer
      7 *  Copyright (c) 2000 by Takashi Iwai <tiwai@suse.de>,
      8 *                        Jaroslav Kysela <perex@perex.cz>
      9 */
     10
     11#include <sound/rawmidi.h>
     12#include <sound/seq_midi_event.h>
     13
     14/*
     15 * device file instance:
     16 * This instance is created at each time the midi device file is
     17 * opened.  Each instance has its own input buffer and MIDI parser
     18 * (buffer), and is associated with the device instance.
     19 */
     20struct snd_virmidi {
     21	struct list_head list;
     22	int seq_mode;
     23	int client;
     24	int port;
     25	bool trigger;
     26	struct snd_midi_event *parser;
     27	struct snd_seq_event event;
     28	struct snd_virmidi_dev *rdev;
     29	struct snd_rawmidi_substream *substream;
     30	struct work_struct output_work;
     31};
     32
     33#define SNDRV_VIRMIDI_SUBSCRIBE		(1<<0)
     34#define SNDRV_VIRMIDI_USE		(1<<1)
     35
     36/*
     37 * device record:
     38 * Each virtual midi device has one device instance.  It contains
     39 * common information and the linked-list of opened files, 
     40 */
     41struct snd_virmidi_dev {
     42	struct snd_card *card;		/* associated card */
     43	struct snd_rawmidi *rmidi;		/* rawmidi device */
     44	int seq_mode;			/* SNDRV_VIRMIDI_XXX */
     45	int device;			/* sequencer device */
     46	int client;			/* created/attached client */
     47	int port;			/* created/attached port */
     48	unsigned int flags;		/* SNDRV_VIRMIDI_* */
     49	rwlock_t filelist_lock;
     50	struct rw_semaphore filelist_sem;
     51	struct list_head filelist;
     52};
     53
     54/* sequencer mode:
     55 * ATTACH = input/output events from midi device are routed to the
     56 *          attached sequencer port.  sequencer port is not created
     57 *          by virmidi itself.
     58 *          the input to rawmidi must be processed by passing the
     59 *          incoming events via snd_virmidi_receive()
     60 * DISPATCH = input/output events are routed to subscribers.
     61 *            sequencer port is created in virmidi.
     62 */
     63#define SNDRV_VIRMIDI_SEQ_NONE		0
     64#define SNDRV_VIRMIDI_SEQ_ATTACH	1
     65#define SNDRV_VIRMIDI_SEQ_DISPATCH	2
     66
     67int snd_virmidi_new(struct snd_card *card, int device, struct snd_rawmidi **rrmidi);
     68
     69#endif /* __SOUND_SEQ_VIRMIDI */