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// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
//
// This file is provided under a dual BSD/GPLv2 license. When using or
// redistributing this file, you may do so under either license.
//
// Copyright(c) 2019-2021 Intel Corporation. All rights reserved.
// Author: Cezary Rojewski <cezary.rojewski@intel.com>
//
#include <sound/soc.h>
#include "ops.h"
#include "sof-priv.h"
#include "sof-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 {
struct sof_probe_dma dma[0];
struct sof_probe_point_desc desc[0];
};
} __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;
/**
* sof_ipc_probe_init - initialize data probing
* @sdev: SOF sound 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 sof_ipc_probe_init(struct snd_sof_dev *sdev, u32 stream_tag,
size_t buffer_size)
{
struct sof_ipc_probe_dma_add_params *msg;
struct sof_ipc_reply reply;
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_ipc_tx_message(sdev->ipc, msg->hdr.cmd, msg, msg->hdr.size,
&reply, sizeof(reply));
kfree(msg);
return ret;
}
/**
* sof_ipc_probe_deinit - cleanup after data probing
* @sdev: SOF sound 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 sof_ipc_probe_deinit(struct snd_sof_dev *sdev)
{
struct sof_ipc_cmd_hdr msg;
struct sof_ipc_reply reply;
msg.size = sizeof(msg);
msg.cmd = SOF_IPC_GLB_PROBE | SOF_IPC_PROBE_DEINIT;
return sof_ipc_tx_message(sdev->ipc, msg.cmd, &msg, msg.size,
&reply, sizeof(reply));
}
static int sof_ipc_probe_info(struct snd_sof_dev *sdev, unsigned int cmd,
void **params, size_t *num_params)
{
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(SOF_IPC_MSG_MAX_SIZE, GFP_KERNEL);
if (!reply)
return -ENOMEM;
msg.rhdr.hdr.size = sizeof(msg);
msg.rhdr.hdr.cmd = SOF_IPC_GLB_PROBE | cmd;
ret = sof_ipc_tx_message(sdev->ipc, msg.rhdr.hdr.cmd, &msg,
msg.rhdr.hdr.size, reply, SOF_IPC_MSG_MAX_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;
}
/**
* sof_ipc_probe_points_info - retrieve list of active probe points
* @sdev: SOF sound 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.
*/
int sof_ipc_probe_points_info(struct snd_sof_dev *sdev,
struct sof_probe_point_desc **desc,
size_t *num_desc)
{
return sof_ipc_probe_info(sdev, SOF_IPC_PROBE_POINT_INFO,
(void **)desc, num_desc);
}
EXPORT_SYMBOL(sof_ipc_probe_points_info);
/**
* sof_ipc_probe_points_add - connect specified probes
* @sdev: SOF sound 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.
*/
int sof_ipc_probe_points_add(struct snd_sof_dev *sdev,
struct sof_probe_point_desc *desc, size_t num_desc)
{
struct sof_ipc_probe_point_add_params *msg;
struct sof_ipc_reply reply;
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_ipc_tx_message(sdev->ipc, msg->hdr.cmd, msg, msg->hdr.size,
&reply, sizeof(reply));
kfree(msg);
return ret;
}
EXPORT_SYMBOL(sof_ipc_probe_points_add);
/**
* sof_ipc_probe_points_remove - disconnect specified probes
* @sdev: SOF sound 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.
*/
int sof_ipc_probe_points_remove(struct snd_sof_dev *sdev,
unsigned int *buffer_id, size_t num_buffer_id)
{
struct sof_ipc_probe_point_remove_params *msg;
struct sof_ipc_reply reply;
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_ipc_tx_message(sdev->ipc, msg->hdr.cmd, msg, msg->hdr.size,
&reply, sizeof(reply));
kfree(msg);
return ret;
}
EXPORT_SYMBOL(sof_ipc_probe_points_remove);
static int sof_probe_compr_startup(struct snd_compr_stream *cstream,
struct snd_soc_dai *dai)
{
struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(dai->component);
int ret;
ret = snd_sof_probe_compr_assign(sdev, cstream, dai);
if (ret < 0) {
dev_err(dai->dev, "Failed to assign probe stream: %d\n", ret);
return ret;
}
sdev->extractor_stream_tag = ret;
return 0;
}
static int sof_probe_compr_shutdown(struct snd_compr_stream *cstream,
struct snd_soc_dai *dai)
{
struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(dai->component);
struct sof_probe_point_desc *desc;
size_t num_desc;
int i, ret;
/* disconnect all probe points */
ret = sof_ipc_probe_points_info(sdev, &desc, &num_desc);
if (ret < 0) {
dev_err(dai->dev, "Failed to get probe points: %d\n", ret);
goto exit;
}
for (i = 0; i < num_desc; i++)
sof_ipc_probe_points_remove(sdev, &desc[i].buffer_id, 1);
kfree(desc);
exit:
ret = sof_ipc_probe_deinit(sdev);
if (ret < 0)
dev_err(dai->dev, "Failed to deinit probe: %d\n", ret);
sdev->extractor_stream_tag = SOF_PROBE_INVALID_NODE_ID;
snd_compr_free_pages(cstream);
return snd_sof_probe_compr_free(sdev, cstream, dai);
}
static int sof_probe_compr_set_params(struct snd_compr_stream *cstream,
struct snd_compr_params *params,
struct snd_soc_dai *dai)
{
struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(dai->component);
struct snd_compr_runtime *rtd = cstream->runtime;
int ret;
cstream->dma_buffer.dev.type = SNDRV_DMA_TYPE_DEV_SG;
cstream->dma_buffer.dev.dev = sdev->dev;
ret = snd_compr_malloc_pages(cstream, rtd->buffer_size);
if (ret < 0)
return ret;
ret = snd_sof_probe_compr_set_params(sdev, cstream, params, dai);
if (ret < 0)
return ret;
ret = sof_ipc_probe_init(sdev, sdev->extractor_stream_tag,
rtd->dma_bytes);
if (ret < 0) {
dev_err(dai->dev, "Failed to init probe: %d\n", ret);
return ret;
}
return 0;
}
static int sof_probe_compr_trigger(struct snd_compr_stream *cstream, int cmd,
struct snd_soc_dai *dai)
{
struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(dai->component);
return snd_sof_probe_compr_trigger(sdev, cstream, cmd, dai);
}
static int sof_probe_compr_pointer(struct snd_compr_stream *cstream,
struct snd_compr_tstamp *tstamp,
struct snd_soc_dai *dai)
{
struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(dai->component);
return snd_sof_probe_compr_pointer(sdev, cstream, tstamp, dai);
}
const struct snd_soc_cdai_ops sof_probe_compr_ops = {
.startup = sof_probe_compr_startup,
.shutdown = sof_probe_compr_shutdown,
.set_params = sof_probe_compr_set_params,
.trigger = sof_probe_compr_trigger,
.pointer = sof_probe_compr_pointer,
};
EXPORT_SYMBOL(sof_probe_compr_ops);
static int sof_probe_compr_copy(struct snd_soc_component *component,
struct snd_compr_stream *cstream,
char __user *buf, size_t count)
{
struct snd_compr_runtime *rtd = cstream->runtime;
unsigned int offset, n;
void *ptr;
int ret;
if (count > rtd->buffer_size)
count = rtd->buffer_size;
div_u64_rem(rtd->total_bytes_transferred, rtd->buffer_size, &offset);
ptr = rtd->dma_area + offset;
n = rtd->buffer_size - offset;
if (count < n) {
ret = copy_to_user(buf, ptr, count);
} else {
ret = copy_to_user(buf, ptr, n);
ret += copy_to_user(buf + n, rtd->dma_area, count - n);
}
if (ret)
return count - ret;
return count;
}
const struct snd_compress_ops sof_probe_compressed_ops = {
.copy = sof_probe_compr_copy,
};
EXPORT_SYMBOL(sof_probe_compressed_ops);