summaryrefslogtreecommitdiff
path: root/sound/soc/sof/probe.c
blob: 14509f4d3f86441ded2704982ec172a8712481d7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
// 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) 2019-2020 Intel Corporation. All rights reserved.
//
// Author: Cezary Rojewski <cezary.rojewski@intel.com>
//

#include "sof-priv.h"
#include "probe.h"

/**
 * 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.
 */
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;
}
EXPORT_SYMBOL(sof_ipc_probe_init);

/**
 * 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.
 */
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));
}
EXPORT_SYMBOL(sof_ipc_probe_deinit);

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_dma_info - retrieve list of active injection dmas
 * @sdev:	SOF sound device
 * @dma:	Returned list of active dmas
 * @num_dma:	Returned count of active dmas
 *
 * Host sends DMA_INFO request to obtain list of injection dmas it
 * can use to transfer data over with.
 *
 * Note that list contains only injection dmas as there is only one
 * extractor (dma) and it is always assigned on probing init.
 * DSP knows exactly where data from extraction probes is going to,
 * which is not the case for injection where multiple streams
 * could be engaged.
 */
int sof_ipc_probe_dma_info(struct snd_sof_dev *sdev,
		struct sof_probe_dma **dma, size_t *num_dma)
{
	return sof_ipc_probe_info(sdev, SOF_IPC_PROBE_DMA_INFO,
			(void **)dma, num_dma);
}
EXPORT_SYMBOL(sof_ipc_probe_dma_info);

/**
 * sof_ipc_probe_dma_add - attach to specified dmas
 * @sdev:	SOF sound device
 * @dma:	List of streams (dmas) to attach to
 * @num_dma:	Number of elements in @dma
 *
 * Contrary to extraction, injection streams are never assigned
 * on init. Before attempting any data injection, host is responsible
 * for specifying streams which will be later used to transfer data
 * to connected probe points.
 */
int sof_ipc_probe_dma_add(struct snd_sof_dev *sdev,
		struct sof_probe_dma *dma, size_t num_dma)
{
	struct sof_ipc_probe_dma_add_params *msg;
	struct sof_ipc_reply reply;
	size_t size = struct_size(msg, dma, num_dma);
	int ret;

	msg = kmalloc(size, GFP_KERNEL);
	if (!msg)
		return -ENOMEM;
	msg->hdr.size = size;
	msg->num_elems = num_dma;
	msg->hdr.cmd = SOF_IPC_GLB_PROBE | SOF_IPC_PROBE_DMA_ADD;
	memcpy(&msg->dma[0], dma, 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_dma_add);

/**
 * sof_ipc_probe_dma_remove - detach from specified dmas
 * @sdev:		SOF sound device
 * @stream_tag:		List of stream tags to detach from
 * @num_stream_tag:	Number of elements in @stream_tag
 *
 * Host sends DMA_REMOVE request to free previously attached stream
 * from being occupied for injection. Each detach operation should
 * match equivalent DMA_ADD. Detach only when all probes tied to
 * given stream have been disconnected.
 */
int sof_ipc_probe_dma_remove(struct snd_sof_dev *sdev,
		unsigned int *stream_tag, size_t num_stream_tag)
{
	struct sof_ipc_probe_dma_remove_params *msg;
	struct sof_ipc_reply reply;
	size_t size = struct_size(msg, stream_tag, num_stream_tag);
	int ret;

	msg = kmalloc(size, GFP_KERNEL);
	if (!msg)
		return -ENOMEM;
	msg->hdr.size = size;
	msg->num_elems = num_stream_tag;
	msg->hdr.cmd = SOF_IPC_GLB_PROBE | SOF_IPC_PROBE_DMA_REMOVE;
	memcpy(&msg->stream_tag[0], stream_tag, 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_dma_remove);

/**
 * 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);