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// SPDX-License-Identifier: GPL-2.0-only
//
// Copyright(c) 2019-2022 Intel Corporation. All rights reserved.
//
// Author: Cezary Rojewski <cezary.rojewski@intel.com>
//
// Code moved to this file by:
// Jyri Sarha <jyri.sarha@intel.com>
//
#include <linux/stddef.h>
#include <sound/soc.h>
#include <sound/sof/header.h>
#include "sof-client.h"
#include "sof-client-probes.h"
struct sof_probe_dma {
unsigned int stream_tag;
unsigned int dma_buffer_size;
} __packed;
struct sof_ipc_probe_dma_add_params {
struct sof_ipc_cmd_hdr hdr;
unsigned int num_elems;
struct sof_probe_dma dma[];
} __packed;
struct sof_ipc_probe_info_params {
struct sof_ipc_reply rhdr;
unsigned int num_elems;
union {
DECLARE_FLEX_ARRAY(struct sof_probe_dma, dma);
DECLARE_FLEX_ARRAY(struct sof_probe_point_desc, desc);
};
} __packed;
struct sof_ipc_probe_point_add_params {
struct sof_ipc_cmd_hdr hdr;
unsigned int num_elems;
struct sof_probe_point_desc desc[];
} __packed;
struct sof_ipc_probe_point_remove_params {
struct sof_ipc_cmd_hdr hdr;
unsigned int num_elems;
unsigned int buffer_id[];
} __packed;
/**
* ipc3_probes_init - initialize data probing
* @cdev: SOF client device
* @stream_tag: Extractor stream tag
* @buffer_size: DMA buffer size to set for extractor
*
* Host chooses whether extraction is supported or not by providing
* valid stream tag to DSP. Once specified, stream described by that
* tag will be tied to DSP for extraction for the entire lifetime of
* probe.
*
* Probing is initialized only once and each INIT request must be
* matched by DEINIT call.
*/
static int ipc3_probes_init(struct sof_client_dev *cdev, u32 stream_tag,
size_t buffer_size)
{
struct sof_ipc_probe_dma_add_params *msg;
size_t size = struct_size(msg, dma, 1);
int ret;
msg = kmalloc(size, GFP_KERNEL);
if (!msg)
return -ENOMEM;
msg->hdr.size = size;
msg->hdr.cmd = SOF_IPC_GLB_PROBE | SOF_IPC_PROBE_INIT;
msg->num_elems = 1;
msg->dma[0].stream_tag = stream_tag;
msg->dma[0].dma_buffer_size = buffer_size;
ret = sof_client_ipc_tx_message_no_reply(cdev, msg);
kfree(msg);
return ret;
}
/**
* ipc3_probes_deinit - cleanup after data probing
* @cdev: SOF client device
*
* Host sends DEINIT request to free previously initialized probe
* on DSP side once it is no longer needed. DEINIT only when there
* are no probes connected and with all injectors detached.
*/
static int ipc3_probes_deinit(struct sof_client_dev *cdev)
{
struct sof_ipc_cmd_hdr msg;
msg.size = sizeof(msg);
msg.cmd = SOF_IPC_GLB_PROBE | SOF_IPC_PROBE_DEINIT;
return sof_client_ipc_tx_message_no_reply(cdev, &msg);
}
static int ipc3_probes_info(struct sof_client_dev *cdev, unsigned int cmd,
void **params, size_t *num_params)
{
size_t max_msg_size = sof_client_get_ipc_max_payload_size(cdev);
struct sof_ipc_probe_info_params msg = {{{0}}};
struct sof_ipc_probe_info_params *reply;
size_t bytes;
int ret;
*params = NULL;
*num_params = 0;
reply = kzalloc(max_msg_size, GFP_KERNEL);
if (!reply)
return -ENOMEM;
msg.rhdr.hdr.size = sizeof(msg);
msg.rhdr.hdr.cmd = SOF_IPC_GLB_PROBE | cmd;
ret = sof_client_ipc_tx_message(cdev, &msg, reply, max_msg_size);
if (ret < 0 || reply->rhdr.error < 0)
goto exit;
if (!reply->num_elems)
goto exit;
if (cmd == SOF_IPC_PROBE_DMA_INFO)
bytes = sizeof(reply->dma[0]);
else
bytes = sizeof(reply->desc[0]);
bytes *= reply->num_elems;
*params = kmemdup(&reply->dma[0], bytes, GFP_KERNEL);
if (!*params) {
ret = -ENOMEM;
goto exit;
}
*num_params = reply->num_elems;
exit:
kfree(reply);
return ret;
}
/**
* ipc3_probes_points_info - retrieve list of active probe points
* @cdev: SOF client device
* @desc: Returned list of active probes
* @num_desc: Returned count of active probes
*
* Host sends PROBE_POINT_INFO request to obtain list of active probe
* points, valid for disconnection when given probe is no longer
* required.
*/
static int ipc3_probes_points_info(struct sof_client_dev *cdev,
struct sof_probe_point_desc **desc,
size_t *num_desc)
{
return ipc3_probes_info(cdev, SOF_IPC_PROBE_POINT_INFO,
(void **)desc, num_desc);
}
/**
* ipc3_probes_points_add - connect specified probes
* @cdev: SOF client device
* @desc: List of probe points to connect
* @num_desc: Number of elements in @desc
*
* Dynamically connects to provided set of endpoints. Immediately
* after connection is established, host must be prepared to
* transfer data from or to target stream given the probing purpose.
*
* Each probe point should be removed using PROBE_POINT_REMOVE
* request when no longer needed.
*/
static int ipc3_probes_points_add(struct sof_client_dev *cdev,
struct sof_probe_point_desc *desc,
size_t num_desc)
{
struct sof_ipc_probe_point_add_params *msg;
size_t size = struct_size(msg, desc, num_desc);
int ret;
msg = kmalloc(size, GFP_KERNEL);
if (!msg)
return -ENOMEM;
msg->hdr.size = size;
msg->num_elems = num_desc;
msg->hdr.cmd = SOF_IPC_GLB_PROBE | SOF_IPC_PROBE_POINT_ADD;
memcpy(&msg->desc[0], desc, size - sizeof(*msg));
ret = sof_client_ipc_tx_message_no_reply(cdev, msg);
kfree(msg);
return ret;
}
/**
* ipc3_probes_points_remove - disconnect specified probes
* @cdev: SOF client device
* @buffer_id: List of probe points to disconnect
* @num_buffer_id: Number of elements in @desc
*
* Removes previously connected probes from list of active probe
* points and frees all resources on DSP side.
*/
static int ipc3_probes_points_remove(struct sof_client_dev *cdev,
unsigned int *buffer_id,
size_t num_buffer_id)
{
struct sof_ipc_probe_point_remove_params *msg;
size_t size = struct_size(msg, buffer_id, num_buffer_id);
int ret;
msg = kmalloc(size, GFP_KERNEL);
if (!msg)
return -ENOMEM;
msg->hdr.size = size;
msg->num_elems = num_buffer_id;
msg->hdr.cmd = SOF_IPC_GLB_PROBE | SOF_IPC_PROBE_POINT_REMOVE;
memcpy(&msg->buffer_id[0], buffer_id, size - sizeof(*msg));
ret = sof_client_ipc_tx_message_no_reply(cdev, msg);
kfree(msg);
return ret;
}
const struct sof_probes_ipc_ops ipc3_probe_ops = {
.init = ipc3_probes_init,
.deinit = ipc3_probes_deinit,
.points_info = ipc3_probes_points_info,
.points_add = ipc3_probes_points_add,
.points_remove = ipc3_probes_points_remove,
};
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