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9e567af4 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
960366cf KK |
2 | /* |
3 | * dsp_pipeline.c: pipelined audio processing | |
4 | * | |
5 | * Copyright (C) 2007, Nadi Sarrar | |
6 | * | |
7 | * Nadi Sarrar <nadi@beronet.com> | |
960366cf KK |
8 | */ |
9 | ||
10 | #include <linux/kernel.h> | |
5a0e3ad6 | 11 | #include <linux/slab.h> |
960366cf KK |
12 | #include <linux/list.h> |
13 | #include <linux/string.h> | |
14 | #include <linux/mISDNif.h> | |
15 | #include <linux/mISDNdsp.h> | |
5d76fc21 | 16 | #include <linux/export.h> |
960366cf KK |
17 | #include "dsp.h" |
18 | #include "dsp_hwec.h" | |
19 | ||
960366cf KK |
20 | struct dsp_pipeline_entry { |
21 | struct mISDN_dsp_element *elem; | |
22 | void *p; | |
23 | struct list_head list; | |
24 | }; | |
25 | struct dsp_element_entry { | |
26 | struct mISDN_dsp_element *elem; | |
27 | struct device dev; | |
28 | struct list_head list; | |
29 | }; | |
30 | ||
31 | static LIST_HEAD(dsp_elements); | |
32 | ||
33 | /* sysfs */ | |
479b4bc8 RM |
34 | static const struct class elements_class = { |
35 | .name = "dsp_pipeline", | |
36 | }; | |
960366cf KK |
37 | |
38 | static ssize_t | |
39 | attr_show_args(struct device *dev, struct device_attribute *attr, char *buf) | |
40 | { | |
41 | struct mISDN_dsp_element *elem = dev_get_drvdata(dev); | |
1ce1513f KK |
42 | int i; |
43 | char *p = buf; | |
960366cf KK |
44 | |
45 | *buf = 0; | |
1ce1513f KK |
46 | for (i = 0; i < elem->num_args; i++) |
47 | p += sprintf(p, "Name: %s\n%s%s%sDescription: %s\n\n", | |
475be4d8 JP |
48 | elem->args[i].name, |
49 | elem->args[i].def ? "Default: " : "", | |
50 | elem->args[i].def ? elem->args[i].def : "", | |
51 | elem->args[i].def ? "\n" : "", | |
52 | elem->args[i].desc); | |
960366cf | 53 | |
1ce1513f | 54 | return p - buf; |
960366cf KK |
55 | } |
56 | ||
57 | static struct device_attribute element_attributes[] = { | |
58 | __ATTR(args, 0444, attr_show_args, NULL), | |
59 | }; | |
60 | ||
808a14a1 AE |
61 | static void |
62 | mISDN_dsp_dev_release(struct device *dev) | |
63 | { | |
64 | struct dsp_element_entry *entry = | |
65 | container_of(dev, struct dsp_element_entry, dev); | |
66 | list_del(&entry->list); | |
67 | kfree(entry); | |
68 | } | |
69 | ||
960366cf KK |
70 | int mISDN_dsp_element_register(struct mISDN_dsp_element *elem) |
71 | { | |
72 | struct dsp_element_entry *entry; | |
73 | int ret, i; | |
74 | ||
75 | if (!elem) | |
76 | return -EINVAL; | |
77 | ||
400fd978 | 78 | entry = kzalloc(sizeof(struct dsp_element_entry), GFP_ATOMIC); |
960366cf KK |
79 | if (!entry) |
80 | return -ENOMEM; | |
81 | ||
98a2ac1c | 82 | INIT_LIST_HEAD(&entry->list); |
960366cf KK |
83 | entry->elem = elem; |
84 | ||
479b4bc8 | 85 | entry->dev.class = &elements_class; |
808a14a1 | 86 | entry->dev.release = mISDN_dsp_dev_release; |
960366cf | 87 | dev_set_drvdata(&entry->dev, elem); |
02aa2a37 | 88 | dev_set_name(&entry->dev, "%s", elem->name); |
960366cf KK |
89 | ret = device_register(&entry->dev); |
90 | if (ret) { | |
91 | printk(KERN_ERR "%s: failed to register %s\n", | |
475be4d8 | 92 | __func__, elem->name); |
960366cf KK |
93 | goto err1; |
94 | } | |
808a14a1 | 95 | list_add_tail(&entry->list, &dsp_elements); |
960366cf | 96 | |
21c150a6 | 97 | for (i = 0; i < ARRAY_SIZE(element_attributes); ++i) { |
960366cf | 98 | ret = device_create_file(&entry->dev, |
475be4d8 | 99 | &element_attributes[i]); |
960366cf KK |
100 | if (ret) { |
101 | printk(KERN_ERR "%s: failed to create device file\n", | |
475be4d8 | 102 | __func__); |
960366cf KK |
103 | goto err2; |
104 | } | |
21c150a6 | 105 | } |
960366cf | 106 | |
960366cf KK |
107 | return 0; |
108 | ||
109 | err2: | |
110 | device_unregister(&entry->dev); | |
808a14a1 | 111 | return ret; |
960366cf | 112 | err1: |
98a2ac1c | 113 | put_device(&entry->dev); |
960366cf KK |
114 | return ret; |
115 | } | |
116 | EXPORT_SYMBOL(mISDN_dsp_element_register); | |
117 | ||
118 | void mISDN_dsp_element_unregister(struct mISDN_dsp_element *elem) | |
119 | { | |
120 | struct dsp_element_entry *entry, *n; | |
121 | ||
122 | if (!elem) | |
123 | return; | |
124 | ||
125 | list_for_each_entry_safe(entry, n, &dsp_elements, list) | |
126 | if (entry->elem == elem) { | |
960366cf | 127 | device_unregister(&entry->dev); |
960366cf KK |
128 | return; |
129 | } | |
130 | printk(KERN_ERR "%s: element %s not in list.\n", __func__, elem->name); | |
131 | } | |
132 | EXPORT_SYMBOL(mISDN_dsp_element_unregister); | |
133 | ||
134 | int dsp_pipeline_module_init(void) | |
135 | { | |
479b4bc8 RM |
136 | int err; |
137 | ||
138 | err = class_register(&elements_class); | |
139 | if (err) | |
140 | return err; | |
960366cf | 141 | |
960366cf KK |
142 | dsp_hwec_init(); |
143 | ||
144 | return 0; | |
145 | } | |
146 | ||
147 | void dsp_pipeline_module_exit(void) | |
148 | { | |
149 | struct dsp_element_entry *entry, *n; | |
150 | ||
151 | dsp_hwec_exit(); | |
152 | ||
479b4bc8 | 153 | class_unregister(&elements_class); |
960366cf KK |
154 | |
155 | list_for_each_entry_safe(entry, n, &dsp_elements, list) { | |
156 | list_del(&entry->list); | |
157 | printk(KERN_WARNING "%s: element was still registered: %s\n", | |
475be4d8 | 158 | __func__, entry->elem->name); |
960366cf KK |
159 | kfree(entry); |
160 | } | |
960366cf KK |
161 | } |
162 | ||
163 | int dsp_pipeline_init(struct dsp_pipeline *pipeline) | |
164 | { | |
165 | if (!pipeline) | |
166 | return -EINVAL; | |
167 | ||
168 | INIT_LIST_HEAD(&pipeline->list); | |
169 | ||
960366cf KK |
170 | return 0; |
171 | } | |
172 | ||
173 | static inline void _dsp_pipeline_destroy(struct dsp_pipeline *pipeline) | |
174 | { | |
175 | struct dsp_pipeline_entry *entry, *n; | |
176 | ||
177 | list_for_each_entry_safe(entry, n, &pipeline->list, list) { | |
178 | list_del(&entry->list); | |
179 | if (entry->elem == dsp_hwec) | |
180 | dsp_hwec_disable(container_of(pipeline, struct dsp, | |
475be4d8 | 181 | pipeline)); |
960366cf KK |
182 | else |
183 | entry->elem->free(entry->p); | |
184 | kfree(entry); | |
185 | } | |
186 | } | |
187 | ||
188 | void dsp_pipeline_destroy(struct dsp_pipeline *pipeline) | |
189 | { | |
190 | ||
191 | if (!pipeline) | |
192 | return; | |
193 | ||
194 | _dsp_pipeline_destroy(pipeline); | |
960366cf KK |
195 | } |
196 | ||
197 | int dsp_pipeline_build(struct dsp_pipeline *pipeline, const char *cfg) | |
198 | { | |
2682ea32 | 199 | int found = 0; |
c6a502c2 | 200 | char *dup, *next, *tok, *name, *args; |
960366cf KK |
201 | struct dsp_element_entry *entry, *n; |
202 | struct dsp_pipeline_entry *pipeline_entry; | |
203 | struct mISDN_dsp_element *elem; | |
204 | ||
205 | if (!pipeline) | |
206 | return -EINVAL; | |
207 | ||
208 | if (!list_empty(&pipeline->list)) | |
209 | _dsp_pipeline_destroy(pipeline); | |
210 | ||
c6a502c2 | 211 | dup = next = kstrdup(cfg, GFP_ATOMIC); |
960366cf KK |
212 | if (!dup) |
213 | return 0; | |
c6a502c2 | 214 | while ((tok = strsep(&next, "|"))) { |
960366cf KK |
215 | if (!strlen(tok)) |
216 | continue; | |
217 | name = strsep(&tok, "("); | |
218 | args = strsep(&tok, ")"); | |
219 | if (args && !*args) | |
bcf91745 | 220 | args = NULL; |
960366cf KK |
221 | |
222 | list_for_each_entry_safe(entry, n, &dsp_elements, list) | |
223 | if (!strcmp(entry->elem->name, name)) { | |
224 | elem = entry->elem; | |
225 | ||
226 | pipeline_entry = kmalloc(sizeof(struct | |
475be4d8 | 227 | dsp_pipeline_entry), GFP_ATOMIC); |
960366cf | 228 | if (!pipeline_entry) { |
808a14a1 | 229 | printk(KERN_ERR "%s: failed to add " |
475be4d8 JP |
230 | "entry to pipeline: %s (out of " |
231 | "memory)\n", __func__, elem->name); | |
960366cf KK |
232 | goto _out; |
233 | } | |
234 | pipeline_entry->elem = elem; | |
235 | ||
236 | if (elem == dsp_hwec) { | |
237 | /* This is a hack to make the hwec | |
238 | available as a pipeline module */ | |
239 | dsp_hwec_enable(container_of(pipeline, | |
475be4d8 | 240 | struct dsp, pipeline), args); |
960366cf | 241 | list_add_tail(&pipeline_entry->list, |
475be4d8 | 242 | &pipeline->list); |
960366cf KK |
243 | } else { |
244 | pipeline_entry->p = elem->new(args); | |
245 | if (pipeline_entry->p) { | |
246 | list_add_tail(&pipeline_entry-> | |
475be4d8 | 247 | list, &pipeline->list); |
960366cf | 248 | } else { |
808a14a1 | 249 | printk(KERN_ERR "%s: failed " |
475be4d8 JP |
250 | "to add entry to pipeline: " |
251 | "%s (new() returned NULL)\n", | |
252 | __func__, elem->name); | |
960366cf | 253 | kfree(pipeline_entry); |
960366cf KK |
254 | } |
255 | } | |
256 | found = 1; | |
257 | break; | |
258 | } | |
259 | ||
260 | if (found) | |
261 | found = 0; | |
2682ea32 | 262 | else |
808a14a1 | 263 | printk(KERN_ERR "%s: element not found, skipping: " |
475be4d8 | 264 | "%s\n", __func__, name); |
960366cf KK |
265 | } |
266 | ||
267 | _out: | |
268 | if (!list_empty(&pipeline->list)) | |
269 | pipeline->inuse = 1; | |
270 | else | |
271 | pipeline->inuse = 0; | |
272 | ||
960366cf KK |
273 | kfree(dup); |
274 | return 0; | |
275 | } | |
276 | ||
277 | void dsp_pipeline_process_tx(struct dsp_pipeline *pipeline, u8 *data, int len) | |
278 | { | |
279 | struct dsp_pipeline_entry *entry; | |
280 | ||
281 | if (!pipeline) | |
282 | return; | |
283 | ||
284 | list_for_each_entry(entry, &pipeline->list, list) | |
285 | if (entry->elem->process_tx) | |
286 | entry->elem->process_tx(entry->p, data, len); | |
287 | } | |
288 | ||
7cfa153d | 289 | void dsp_pipeline_process_rx(struct dsp_pipeline *pipeline, u8 *data, int len, |
475be4d8 | 290 | unsigned int txlen) |
960366cf KK |
291 | { |
292 | struct dsp_pipeline_entry *entry; | |
293 | ||
294 | if (!pipeline) | |
295 | return; | |
296 | ||
297 | list_for_each_entry_reverse(entry, &pipeline->list, list) | |
298 | if (entry->elem->process_rx) | |
7cfa153d | 299 | entry->elem->process_rx(entry->p, data, len, txlen); |
960366cf | 300 | } |