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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virtio_ctl_msg.h (2343B)

      1/* SPDX-License-Identifier: GPL-2.0+ */
      2/*
      3 * virtio-snd: Virtio sound device
      4 * Copyright (C) 2021 OpenSynergy GmbH
      5 */
      6#ifndef VIRTIO_SND_MSG_H
      7#define VIRTIO_SND_MSG_H
      8
      9#include <linux/atomic.h>
     10#include <linux/virtio.h>
     11
     12struct virtio_snd;
     13struct virtio_snd_msg;
     14
     15void virtsnd_ctl_msg_ref(struct virtio_snd_msg *msg);
     16
     17void virtsnd_ctl_msg_unref(struct virtio_snd_msg *msg);
     18
     19void *virtsnd_ctl_msg_request(struct virtio_snd_msg *msg);
     20
     21void *virtsnd_ctl_msg_response(struct virtio_snd_msg *msg);
     22
     23struct virtio_snd_msg *virtsnd_ctl_msg_alloc(size_t request_size,
     24					     size_t response_size, gfp_t gfp);
     25
     26int virtsnd_ctl_msg_send(struct virtio_snd *snd, struct virtio_snd_msg *msg,
     27			 struct scatterlist *out_sgs,
     28			 struct scatterlist *in_sgs, bool nowait);
     29
     30/**
     31 * virtsnd_ctl_msg_send_sync() - Simplified sending of synchronous message.
     32 * @snd: VirtIO sound device.
     33 * @msg: Control message.
     34 *
     35 * After returning from this function, the message will be deleted. If message
     36 * content is still needed, the caller must additionally to
     37 * virtsnd_ctl_msg_ref/unref() it.
     38 *
     39 * The msg_timeout_ms module parameter defines the message completion timeout.
     40 * If the message is not completed within this time, the function will return an
     41 * error.
     42 *
     43 * Context: Any context that permits to sleep.
     44 * Return: 0 on success, -errno on failure.
     45 *
     46 * The return value is a message status code (VIRTIO_SND_S_XXX) converted to an
     47 * appropriate -errno value.
     48 */
     49static inline int virtsnd_ctl_msg_send_sync(struct virtio_snd *snd,
     50					    struct virtio_snd_msg *msg)
     51{
     52	return virtsnd_ctl_msg_send(snd, msg, NULL, NULL, false);
     53}
     54
     55/**
     56 * virtsnd_ctl_msg_send_async() - Simplified sending of asynchronous message.
     57 * @snd: VirtIO sound device.
     58 * @msg: Control message.
     59 *
     60 * Context: Any context.
     61 * Return: 0 on success, -errno on failure.
     62 */
     63static inline int virtsnd_ctl_msg_send_async(struct virtio_snd *snd,
     64					     struct virtio_snd_msg *msg)
     65{
     66	return virtsnd_ctl_msg_send(snd, msg, NULL, NULL, true);
     67}
     68
     69void virtsnd_ctl_msg_cancel_all(struct virtio_snd *snd);
     70
     71void virtsnd_ctl_msg_complete(struct virtio_snd_msg *msg);
     72
     73int virtsnd_ctl_query_info(struct virtio_snd *snd, int command, int start_id,
     74			   int count, size_t size, void *info);
     75
     76void virtsnd_ctl_notify_cb(struct virtqueue *vqueue);
     77
     78#endif /* VIRTIO_SND_MSG_H */