summaryrefslogtreecommitdiffstats
path: root/sound/soc/intel/avs/utils.c
blob: 6473e3ae4c6ec7239ff65de83a662853c4daa213 (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
291
292
293
294
295
296
297
298
299
300
301
// SPDX-License-Identifier: GPL-2.0-only
//
// Copyright(c) 2021-2022 Intel Corporation. All rights reserved.
//
// Authors: Cezary Rojewski <cezary.rojewski@intel.com>
//          Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
//

#include <linux/firmware.h>
#include <linux/slab.h>
#include "avs.h"
#include "messages.h"

/* Caller responsible for holding adev->modres_mutex. */
static int avs_module_entry_index(struct avs_dev *adev, const guid_t *uuid)
{
	int i;

	for (i = 0; i < adev->mods_info->count; i++) {
		struct avs_module_entry *module;

		module = &adev->mods_info->entries[i];
		if (guid_equal(&module->uuid, uuid))
			return i;
	}

	return -ENOENT;
}

/* Caller responsible for holding adev->modres_mutex. */
static int avs_module_id_entry_index(struct avs_dev *adev, u32 module_id)
{
	int i;

	for (i = 0; i < adev->mods_info->count; i++) {
		struct avs_module_entry *module;

		module = &adev->mods_info->entries[i];
		if (module->module_id == module_id)
			return i;
	}

	return -ENOENT;
}

int avs_get_module_entry(struct avs_dev *adev, const guid_t *uuid, struct avs_module_entry *entry)
{
	int idx;

	mutex_lock(&adev->modres_mutex);

	idx = avs_module_entry_index(adev, uuid);
	if (idx >= 0)
		memcpy(entry, &adev->mods_info->entries[idx], sizeof(*entry));

	mutex_unlock(&adev->modres_mutex);
	return (idx < 0) ? idx : 0;
}

int avs_get_module_id_entry(struct avs_dev *adev, u32 module_id, struct avs_module_entry *entry)
{
	int idx;

	mutex_lock(&adev->modres_mutex);

	idx = avs_module_id_entry_index(adev, module_id);
	if (idx >= 0)
		memcpy(entry, &adev->mods_info->entries[idx], sizeof(*entry));

	mutex_unlock(&adev->modres_mutex);
	return (idx < 0) ? idx : 0;
}

int avs_get_module_id(struct avs_dev *adev, const guid_t *uuid)
{
	struct avs_module_entry module;
	int ret;

	ret = avs_get_module_entry(adev, uuid, &module);
	return !ret ? module.module_id : -ENOENT;
}

bool avs_is_module_ida_empty(struct avs_dev *adev, u32 module_id)
{
	bool ret = false;
	int idx;

	mutex_lock(&adev->modres_mutex);

	idx = avs_module_id_entry_index(adev, module_id);
	if (idx >= 0)
		ret = ida_is_empty(adev->mod_idas[idx]);

	mutex_unlock(&adev->modres_mutex);
	return ret;
}

/* Caller responsible for holding adev->modres_mutex. */
static void avs_module_ida_destroy(struct avs_dev *adev)
{
	int i = adev->mods_info ? adev->mods_info->count : 0;

	while (i--) {
		ida_destroy(adev->mod_idas[i]);
		kfree(adev->mod_idas[i]);
	}
	kfree(adev->mod_idas);
}

/* Caller responsible for holding adev->modres_mutex. */
static int
avs_module_ida_alloc(struct avs_dev *adev, struct avs_mods_info *newinfo, bool purge)
{
	struct avs_mods_info *oldinfo = adev->mods_info;
	struct ida **ida_ptrs;
	u32 tocopy_count = 0;
	int i;

	if (!purge && oldinfo) {
		if (oldinfo->count >= newinfo->count)
			dev_warn(adev->dev, "refreshing %d modules info with %d\n",
				 oldinfo->count, newinfo->count);
		tocopy_count = oldinfo->count;
	}

	ida_ptrs = kcalloc(newinfo->count, sizeof(*ida_ptrs), GFP_KERNEL);
	if (!ida_ptrs)
		return -ENOMEM;

	if (tocopy_count)
		memcpy(ida_ptrs, adev->mod_idas, tocopy_count * sizeof(*ida_ptrs));

	for (i = tocopy_count; i < newinfo->count; i++) {
		ida_ptrs[i] = kzalloc(sizeof(**ida_ptrs), GFP_KERNEL);
		if (!ida_ptrs[i]) {
			while (i--)
				kfree(ida_ptrs[i]);

			kfree(ida_ptrs);
			return -ENOMEM;
		}

		ida_init(ida_ptrs[i]);
	}

	/* If old elements have been reused, don't wipe them. */
	if (tocopy_count)
		kfree(adev->mod_idas);
	else
		avs_module_ida_destroy(adev);

	adev->mod_idas = ida_ptrs;
	return 0;
}

int avs_module_info_init(struct avs_dev *adev, bool purge)
{
	struct avs_mods_info *info;
	int ret;

	ret = avs_ipc_get_modules_info(adev, &info);
	if (ret)
		return AVS_IPC_RET(ret);

	mutex_lock(&adev->modres_mutex);

	ret = avs_module_ida_alloc(adev, info, purge);
	if (ret < 0) {
		dev_err(adev->dev, "initialize module idas failed: %d\n", ret);
		goto exit;
	}

	/* Refresh current information with newly received table. */
	kfree(adev->mods_info);
	adev->mods_info = info;

exit:
	mutex_unlock(&adev->modres_mutex);
	return ret;
}

void avs_module_info_free(struct avs_dev *adev)
{
	mutex_lock(&adev->modres_mutex);

	avs_module_ida_destroy(adev);
	kfree(adev->mods_info);
	adev->mods_info = NULL;

	mutex_unlock(&adev->modres_mutex);
}

int avs_module_id_alloc(struct avs_dev *adev, u16 module_id)
{
	int ret, idx, max_id;

	mutex_lock(&adev->modres_mutex);

	idx = avs_module_id_entry_index(adev, module_id);
	if (idx == -ENOENT) {
		dev_err(adev->dev, "invalid module id: %d", module_id);
		ret = -EINVAL;
		goto exit;
	}
	max_id = adev->mods_info->entries[idx].instance_max_count - 1;
	ret = ida_alloc_max(adev->mod_idas[idx], max_id, GFP_KERNEL);
exit:
	mutex_unlock(&adev->modres_mutex);
	return ret;
}

void avs_module_id_free(struct avs_dev *adev, u16 module_id, u8 instance_id)
{
	int idx;

	mutex_lock(&adev->modres_mutex);

	idx = avs_module_id_entry_index(adev, module_id);
	if (idx == -ENOENT) {
		dev_err(adev->dev, "invalid module id: %d", module_id);
		goto exit;
	}

	ida_free(adev->mod_idas[idx], instance_id);
exit:
	mutex_unlock(&adev->modres_mutex);
}

/*
 * Once driver loads FW it should keep it in memory, so we are not affected
 * by FW removal from filesystem or even worse by loading different FW at
 * runtime suspend/resume.
 */
int avs_request_firmware(struct avs_dev *adev, const struct firmware **fw_p, const char *name)
{
	struct avs_fw_entry *entry;
	int ret;

	/* first check in list if it is not already loaded */
	list_for_each_entry(entry, &adev->fw_list, node) {
		if (!strcmp(name, entry->name)) {
			*fw_p = entry->fw;
			return 0;
		}
	}

	/* FW is not loaded, let's load it now and add to the list */
	entry = kzalloc(sizeof(*entry), GFP_KERNEL);
	if (!entry)
		return -ENOMEM;

	entry->name = kstrdup(name, GFP_KERNEL);
	if (!entry->name) {
		kfree(entry);
		return -ENOMEM;
	}

	ret = request_firmware(&entry->fw, name, adev->dev);
	if (ret < 0) {
		kfree(entry->name);
		kfree(entry);
		return ret;
	}

	*fw_p = entry->fw;

	list_add_tail(&entry->node, &adev->fw_list);

	return 0;
}

/*
 * Release single FW entry, used to handle errors in functions calling
 * avs_request_firmware()
 */
void avs_release_last_firmware(struct avs_dev *adev)
{
	struct avs_fw_entry *entry;

	entry = list_last_entry(&adev->fw_list, typeof(*entry), node);

	list_del(&entry->node);
	release_firmware(entry->fw);
	kfree(entry->name);
	kfree(entry);
}

/*
 * Release all FW entries, used on driver removal
 */
void avs_release_firmwares(struct avs_dev *adev)
{
	struct avs_fw_entry *entry, *tmp;

	list_for_each_entry_safe(entry, tmp, &adev->fw_list, node) {
		list_del(&entry->node);
		release_firmware(entry->fw);
		kfree(entry->name);
		kfree(entry);
	}
}