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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channel_map.h (2011B)

      1/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
      2/*
      3 * This file is provided under a dual BSD/GPLv2 license.  When using or
      4 * redistributing this file, you may do so under either license.
      5 *
      6 * Copyright(c) 2019 Intel Corporation. All rights reserved.
      7 */
      8
      9#ifndef __IPC_CHANNEL_MAP_H__
     10#define __IPC_CHANNEL_MAP_H__
     11
     12#include <uapi/sound/sof/header.h>
     13#include <sound/sof/header.h>
     14
     15/**
     16 * \brief Channel map, specifies transformation of one-to-many or many-to-one.
     17 *
     18 * In case of one-to-many specifies how the output channels are computed out of
     19 * a single source channel,
     20 * in case of many-to-one specifies how a single target channel is computed
     21 * from a multichannel input stream.
     22 *
     23 * Channel index specifies position of the channel in the stream on the 'one'
     24 * side.
     25 *
     26 * Ext ID is the identifier of external part of the transformation. Depending
     27 * on the context, it may be pipeline ID, dai ID, ...
     28 *
     29 * Channel mask describes which channels are taken into account on the "many"
     30 * side. Bit[i] set to 1 means that i-th channel is used for computation
     31 * (either as source or as a target).
     32 *
     33 * Channel mask is followed by array of coefficients in Q2.30 format,
     34 * one per each channel set in the mask (left to right, LS bit set in the
     35 * mask corresponds to ch_coeffs[0]).
     36 */
     37struct sof_ipc_channel_map {
     38	uint32_t ch_index;
     39	uint32_t ext_id;
     40	uint32_t ch_mask;
     41	uint32_t reserved;
     42	int32_t ch_coeffs[];
     43} __packed;
     44
     45/**
     46 * \brief Complete map for each channel of a multichannel stream.
     47 *
     48 * num_ch_map Specifies number of items in the ch_map.
     49 * More than one transformation per a single channel is allowed (in case
     50 * multiple external entities are transformed).
     51 * A channel may be skipped in the transformation list, then it is filled
     52 * with 0's by the transformation function.
     53 */
     54struct sof_ipc_stream_map {
     55	struct sof_ipc_cmd_hdr hdr;
     56	uint32_t num_ch_map;
     57	uint32_t reserved[3];
     58	struct sof_ipc_channel_map ch_map[];
     59} __packed;
     60
     61#endif /* __IPC_CHANNEL_MAP_H__ */