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There is a regular need in the kernel to provide a way to declare having a dynamically sized set of trailing elements in a structure. Kernel code should always use “flexible array members”[1] for these cases. The older style of one-element or zero-length arrays should no longer be used[2]. [1] https://en.wikipedia.org/wiki/Flexible_array_member [2] https://github.com/KSPP/linux/issues/21 Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
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/*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* Copyright(c) 2019-2020 Intel Corporation. All rights reserved.
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*
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* Author: Cezary Rojewski <cezary.rojewski@intel.com>
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*/
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#ifndef __SOF_PROBE_H
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#define __SOF_PROBE_H
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#include <sound/sof/header.h>
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struct snd_sof_dev;
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#define SOF_PROBE_INVALID_NODE_ID UINT_MAX
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struct sof_probe_dma {
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unsigned int stream_tag;
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unsigned int dma_buffer_size;
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} __packed;
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enum sof_connection_purpose {
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SOF_CONNECTION_PURPOSE_EXTRACT = 1,
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SOF_CONNECTION_PURPOSE_INJECT,
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};
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struct sof_probe_point_desc {
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unsigned int buffer_id;
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unsigned int purpose;
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unsigned int stream_tag;
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} __packed;
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struct sof_ipc_probe_dma_add_params {
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struct sof_ipc_cmd_hdr hdr;
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unsigned int num_elems;
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struct sof_probe_dma dma[];
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} __packed;
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struct sof_ipc_probe_info_params {
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struct sof_ipc_reply rhdr;
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unsigned int num_elems;
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union {
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struct sof_probe_dma dma[0];
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struct sof_probe_point_desc desc[0];
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};
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} __packed;
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struct sof_ipc_probe_dma_remove_params {
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struct sof_ipc_cmd_hdr hdr;
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unsigned int num_elems;
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unsigned int stream_tag[];
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} __packed;
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struct sof_ipc_probe_point_add_params {
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struct sof_ipc_cmd_hdr hdr;
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unsigned int num_elems;
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struct sof_probe_point_desc desc[];
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} __packed;
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struct sof_ipc_probe_point_remove_params {
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struct sof_ipc_cmd_hdr hdr;
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unsigned int num_elems;
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unsigned int buffer_id[];
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} __packed;
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int sof_ipc_probe_init(struct snd_sof_dev *sdev,
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u32 stream_tag, size_t buffer_size);
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int sof_ipc_probe_deinit(struct snd_sof_dev *sdev);
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int sof_ipc_probe_dma_info(struct snd_sof_dev *sdev,
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struct sof_probe_dma **dma, size_t *num_dma);
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int sof_ipc_probe_dma_add(struct snd_sof_dev *sdev,
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struct sof_probe_dma *dma, size_t num_dma);
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int sof_ipc_probe_dma_remove(struct snd_sof_dev *sdev,
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unsigned int *stream_tag, size_t num_stream_tag);
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int sof_ipc_probe_points_info(struct snd_sof_dev *sdev,
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struct sof_probe_point_desc **desc, size_t *num_desc);
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int sof_ipc_probe_points_add(struct snd_sof_dev *sdev,
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struct sof_probe_point_desc *desc, size_t num_desc);
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int sof_ipc_probe_points_remove(struct snd_sof_dev *sdev,
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unsigned int *buffer_id, size_t num_buffer_id);
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#endif
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