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Commit | Line | Data |
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4a776f0a HS |
1 | /* |
2 | * DMA Engine test module | |
3 | * | |
4 | * Copyright (C) 2007 Atmel Corporation | |
851b7e16 | 5 | * Copyright (C) 2013 Intel Corporation |
4a776f0a HS |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/delay.h> | |
b7f080cf | 12 | #include <linux/dma-mapping.h> |
4a776f0a | 13 | #include <linux/dmaengine.h> |
981ed70d | 14 | #include <linux/freezer.h> |
4a776f0a HS |
15 | #include <linux/init.h> |
16 | #include <linux/kthread.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/moduleparam.h> | |
19 | #include <linux/random.h> | |
5a0e3ad6 | 20 | #include <linux/slab.h> |
4a776f0a | 21 | #include <linux/wait.h> |
851b7e16 AS |
22 | #include <linux/ctype.h> |
23 | #include <linux/debugfs.h> | |
24 | #include <linux/uaccess.h> | |
25 | #include <linux/seq_file.h> | |
4a776f0a HS |
26 | |
27 | static unsigned int test_buf_size = 16384; | |
a6c268d0 | 28 | module_param(test_buf_size, uint, S_IRUGO | S_IWUSR); |
4a776f0a HS |
29 | MODULE_PARM_DESC(test_buf_size, "Size of the memcpy test buffer"); |
30 | ||
06190d84 | 31 | static char test_channel[20]; |
a6c268d0 AS |
32 | module_param_string(channel, test_channel, sizeof(test_channel), |
33 | S_IRUGO | S_IWUSR); | |
4a776f0a HS |
34 | MODULE_PARM_DESC(channel, "Bus ID of the channel to test (default: any)"); |
35 | ||
06190d84 | 36 | static char test_device[20]; |
a6c268d0 AS |
37 | module_param_string(device, test_device, sizeof(test_device), |
38 | S_IRUGO | S_IWUSR); | |
4a776f0a HS |
39 | MODULE_PARM_DESC(device, "Bus ID of the DMA Engine to test (default: any)"); |
40 | ||
41 | static unsigned int threads_per_chan = 1; | |
a6c268d0 | 42 | module_param(threads_per_chan, uint, S_IRUGO | S_IWUSR); |
4a776f0a HS |
43 | MODULE_PARM_DESC(threads_per_chan, |
44 | "Number of threads to start per channel (default: 1)"); | |
45 | ||
46 | static unsigned int max_channels; | |
a6c268d0 | 47 | module_param(max_channels, uint, S_IRUGO | S_IWUSR); |
33df8ca0 | 48 | MODULE_PARM_DESC(max_channels, |
4a776f0a HS |
49 | "Maximum number of channels to use (default: all)"); |
50 | ||
0a2ff57d | 51 | static unsigned int iterations; |
a6c268d0 | 52 | module_param(iterations, uint, S_IRUGO | S_IWUSR); |
0a2ff57d NF |
53 | MODULE_PARM_DESC(iterations, |
54 | "Iterations before stopping test (default: infinite)"); | |
55 | ||
b54d5cb9 | 56 | static unsigned int xor_sources = 3; |
a6c268d0 | 57 | module_param(xor_sources, uint, S_IRUGO | S_IWUSR); |
b54d5cb9 DW |
58 | MODULE_PARM_DESC(xor_sources, |
59 | "Number of xor source buffers (default: 3)"); | |
60 | ||
58691d64 | 61 | static unsigned int pq_sources = 3; |
a6c268d0 | 62 | module_param(pq_sources, uint, S_IRUGO | S_IWUSR); |
58691d64 DW |
63 | MODULE_PARM_DESC(pq_sources, |
64 | "Number of p+q source buffers (default: 3)"); | |
65 | ||
d42efe6b | 66 | static int timeout = 3000; |
a6c268d0 | 67 | module_param(timeout, uint, S_IRUGO | S_IWUSR); |
85ee7a1d JP |
68 | MODULE_PARM_DESC(timeout, "Transfer Timeout in msec (default: 3000), " |
69 | "Pass -1 for infinite timeout"); | |
d42efe6b | 70 | |
74b5c07a AS |
71 | /* Maximum amount of mismatched bytes in buffer to print */ |
72 | #define MAX_ERROR_COUNT 32 | |
73 | ||
4a776f0a HS |
74 | /* |
75 | * Initialization patterns. All bytes in the source buffer has bit 7 | |
76 | * set, all bytes in the destination buffer has bit 7 cleared. | |
77 | * | |
78 | * Bit 6 is set for all bytes which are to be copied by the DMA | |
79 | * engine. Bit 5 is set for all bytes which are to be overwritten by | |
80 | * the DMA engine. | |
81 | * | |
82 | * The remaining bits are the inverse of a counter which increments by | |
83 | * one for each byte address. | |
84 | */ | |
85 | #define PATTERN_SRC 0x80 | |
86 | #define PATTERN_DST 0x00 | |
87 | #define PATTERN_COPY 0x40 | |
88 | #define PATTERN_OVERWRITE 0x20 | |
89 | #define PATTERN_COUNT_MASK 0x1f | |
90 | ||
95019c8c AS |
91 | enum dmatest_error_type { |
92 | DMATEST_ET_OK, | |
93 | DMATEST_ET_MAP_SRC, | |
94 | DMATEST_ET_MAP_DST, | |
95 | DMATEST_ET_PREP, | |
96 | DMATEST_ET_SUBMIT, | |
97 | DMATEST_ET_TIMEOUT, | |
98 | DMATEST_ET_DMA_ERROR, | |
99 | DMATEST_ET_DMA_IN_PROGRESS, | |
100 | DMATEST_ET_VERIFY, | |
101 | }; | |
102 | ||
103 | struct dmatest_thread_result { | |
104 | struct list_head node; | |
105 | unsigned int n; | |
106 | unsigned int src_off; | |
107 | unsigned int dst_off; | |
108 | unsigned int len; | |
109 | enum dmatest_error_type type; | |
110 | union { | |
7b610178 DW |
111 | unsigned long data; |
112 | dma_cookie_t cookie; | |
113 | enum dma_status status; | |
114 | int error; | |
95019c8c AS |
115 | }; |
116 | }; | |
117 | ||
118 | struct dmatest_result { | |
119 | struct list_head node; | |
120 | char *name; | |
121 | struct list_head results; | |
122 | }; | |
123 | ||
e03e93a9 AS |
124 | struct dmatest_info; |
125 | ||
4a776f0a HS |
126 | struct dmatest_thread { |
127 | struct list_head node; | |
e03e93a9 | 128 | struct dmatest_info *info; |
4a776f0a HS |
129 | struct task_struct *task; |
130 | struct dma_chan *chan; | |
b54d5cb9 DW |
131 | u8 **srcs; |
132 | u8 **dsts; | |
133 | enum dma_transaction_type type; | |
3e5ccd86 | 134 | bool done; |
4a776f0a HS |
135 | }; |
136 | ||
137 | struct dmatest_chan { | |
138 | struct list_head node; | |
139 | struct dma_chan *chan; | |
140 | struct list_head threads; | |
141 | }; | |
142 | ||
e03e93a9 | 143 | /** |
15b8a8ea | 144 | * struct dmatest_params - test parameters. |
e03e93a9 AS |
145 | * @buf_size: size of the memcpy test buffer |
146 | * @channel: bus ID of the channel to test | |
147 | * @device: bus ID of the DMA Engine to test | |
148 | * @threads_per_chan: number of threads to start per channel | |
149 | * @max_channels: maximum number of channels to use | |
150 | * @iterations: iterations before stopping test | |
151 | * @xor_sources: number of xor source buffers | |
152 | * @pq_sources: number of p+q source buffers | |
153 | * @timeout: transfer timeout in msec, -1 for infinite timeout | |
154 | */ | |
15b8a8ea | 155 | struct dmatest_params { |
e03e93a9 AS |
156 | unsigned int buf_size; |
157 | char channel[20]; | |
158 | char device[20]; | |
159 | unsigned int threads_per_chan; | |
160 | unsigned int max_channels; | |
161 | unsigned int iterations; | |
162 | unsigned int xor_sources; | |
163 | unsigned int pq_sources; | |
164 | int timeout; | |
15b8a8ea AS |
165 | }; |
166 | ||
167 | /** | |
168 | * struct dmatest_info - test information. | |
169 | * @params: test parameters | |
851b7e16 | 170 | * @lock: access protection to the fields of this structure |
15b8a8ea AS |
171 | */ |
172 | struct dmatest_info { | |
173 | /* Test parameters */ | |
174 | struct dmatest_params params; | |
838cc704 AS |
175 | |
176 | /* Internal state */ | |
177 | struct list_head channels; | |
178 | unsigned int nr_channels; | |
851b7e16 AS |
179 | struct mutex lock; |
180 | ||
181 | /* debugfs related stuff */ | |
182 | struct dentry *root; | |
95019c8c AS |
183 | |
184 | /* Test results */ | |
185 | struct list_head results; | |
186 | struct mutex results_lock; | |
e03e93a9 AS |
187 | }; |
188 | ||
189 | static struct dmatest_info test_info; | |
190 | ||
15b8a8ea | 191 | static bool dmatest_match_channel(struct dmatest_params *params, |
e03e93a9 | 192 | struct dma_chan *chan) |
4a776f0a | 193 | { |
15b8a8ea | 194 | if (params->channel[0] == '\0') |
4a776f0a | 195 | return true; |
15b8a8ea | 196 | return strcmp(dma_chan_name(chan), params->channel) == 0; |
4a776f0a HS |
197 | } |
198 | ||
15b8a8ea | 199 | static bool dmatest_match_device(struct dmatest_params *params, |
e03e93a9 | 200 | struct dma_device *device) |
4a776f0a | 201 | { |
15b8a8ea | 202 | if (params->device[0] == '\0') |
4a776f0a | 203 | return true; |
15b8a8ea | 204 | return strcmp(dev_name(device->dev), params->device) == 0; |
4a776f0a HS |
205 | } |
206 | ||
207 | static unsigned long dmatest_random(void) | |
208 | { | |
209 | unsigned long buf; | |
210 | ||
211 | get_random_bytes(&buf, sizeof(buf)); | |
212 | return buf; | |
213 | } | |
214 | ||
e03e93a9 AS |
215 | static void dmatest_init_srcs(u8 **bufs, unsigned int start, unsigned int len, |
216 | unsigned int buf_size) | |
4a776f0a HS |
217 | { |
218 | unsigned int i; | |
b54d5cb9 DW |
219 | u8 *buf; |
220 | ||
221 | for (; (buf = *bufs); bufs++) { | |
222 | for (i = 0; i < start; i++) | |
223 | buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK); | |
224 | for ( ; i < start + len; i++) | |
225 | buf[i] = PATTERN_SRC | PATTERN_COPY | |
c019894e | 226 | | (~i & PATTERN_COUNT_MASK); |
e03e93a9 | 227 | for ( ; i < buf_size; i++) |
b54d5cb9 DW |
228 | buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK); |
229 | buf++; | |
230 | } | |
4a776f0a HS |
231 | } |
232 | ||
e03e93a9 AS |
233 | static void dmatest_init_dsts(u8 **bufs, unsigned int start, unsigned int len, |
234 | unsigned int buf_size) | |
4a776f0a HS |
235 | { |
236 | unsigned int i; | |
b54d5cb9 DW |
237 | u8 *buf; |
238 | ||
239 | for (; (buf = *bufs); bufs++) { | |
240 | for (i = 0; i < start; i++) | |
241 | buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK); | |
242 | for ( ; i < start + len; i++) | |
243 | buf[i] = PATTERN_DST | PATTERN_OVERWRITE | |
244 | | (~i & PATTERN_COUNT_MASK); | |
e03e93a9 | 245 | for ( ; i < buf_size; i++) |
b54d5cb9 DW |
246 | buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK); |
247 | } | |
4a776f0a HS |
248 | } |
249 | ||
7b610178 DW |
250 | static void dmatest_mismatch(u8 actual, u8 pattern, unsigned int index, |
251 | unsigned int counter, bool is_srcbuf) | |
252 | { | |
253 | u8 diff = actual ^ pattern; | |
254 | u8 expected = pattern | (~counter & PATTERN_COUNT_MASK); | |
255 | const char *thread_name = current->comm; | |
256 | ||
257 | if (is_srcbuf) | |
258 | pr_warn("%s: srcbuf[0x%x] overwritten! Expected %02x, got %02x\n", | |
259 | thread_name, index, expected, actual); | |
260 | else if ((pattern & PATTERN_COPY) | |
261 | && (diff & (PATTERN_COPY | PATTERN_OVERWRITE))) | |
262 | pr_warn("%s: dstbuf[0x%x] not copied! Expected %02x, got %02x\n", | |
263 | thread_name, index, expected, actual); | |
264 | else if (diff & PATTERN_SRC) | |
265 | pr_warn("%s: dstbuf[0x%x] was copied! Expected %02x, got %02x\n", | |
266 | thread_name, index, expected, actual); | |
267 | else | |
268 | pr_warn("%s: dstbuf[0x%x] mismatch! Expected %02x, got %02x\n", | |
269 | thread_name, index, expected, actual); | |
270 | } | |
271 | ||
272 | static unsigned int dmatest_verify(u8 **bufs, unsigned int start, | |
273 | unsigned int end, unsigned int counter, u8 pattern, | |
274 | bool is_srcbuf) | |
4a776f0a HS |
275 | { |
276 | unsigned int i; | |
277 | unsigned int error_count = 0; | |
278 | u8 actual; | |
b54d5cb9 DW |
279 | u8 expected; |
280 | u8 *buf; | |
281 | unsigned int counter_orig = counter; | |
282 | ||
283 | for (; (buf = *bufs); bufs++) { | |
284 | counter = counter_orig; | |
285 | for (i = start; i < end; i++) { | |
286 | actual = buf[i]; | |
287 | expected = pattern | (~counter & PATTERN_COUNT_MASK); | |
288 | if (actual != expected) { | |
7b610178 DW |
289 | if (error_count < MAX_ERROR_COUNT) |
290 | dmatest_mismatch(actual, pattern, i, | |
291 | counter, is_srcbuf); | |
b54d5cb9 DW |
292 | error_count++; |
293 | } | |
294 | counter++; | |
4a776f0a | 295 | } |
4a776f0a HS |
296 | } |
297 | ||
74b5c07a | 298 | if (error_count > MAX_ERROR_COUNT) |
7b610178 | 299 | pr_warn("%s: %u errors suppressed\n", |
74b5c07a | 300 | current->comm, error_count - MAX_ERROR_COUNT); |
4a776f0a HS |
301 | |
302 | return error_count; | |
303 | } | |
304 | ||
adfa543e TH |
305 | /* poor man's completion - we want to use wait_event_freezable() on it */ |
306 | struct dmatest_done { | |
307 | bool done; | |
308 | wait_queue_head_t *wait; | |
309 | }; | |
310 | ||
311 | static void dmatest_callback(void *arg) | |
e44e0aa3 | 312 | { |
adfa543e TH |
313 | struct dmatest_done *done = arg; |
314 | ||
315 | done->done = true; | |
316 | wake_up_all(done->wait); | |
e44e0aa3 DW |
317 | } |
318 | ||
632fd283 AS |
319 | static inline void unmap_src(struct device *dev, dma_addr_t *addr, size_t len, |
320 | unsigned int count) | |
321 | { | |
322 | while (count--) | |
323 | dma_unmap_single(dev, addr[count], len, DMA_TO_DEVICE); | |
324 | } | |
325 | ||
326 | static inline void unmap_dst(struct device *dev, dma_addr_t *addr, size_t len, | |
327 | unsigned int count) | |
328 | { | |
329 | while (count--) | |
330 | dma_unmap_single(dev, addr[count], len, DMA_BIDIRECTIONAL); | |
331 | } | |
332 | ||
8be9e32b AM |
333 | static unsigned int min_odd(unsigned int x, unsigned int y) |
334 | { | |
335 | unsigned int val = min(x, y); | |
336 | ||
337 | return val % 2 ? val : val - 1; | |
338 | } | |
339 | ||
95019c8c AS |
340 | static char *thread_result_get(const char *name, |
341 | struct dmatest_thread_result *tr) | |
342 | { | |
343 | static const char * const messages[] = { | |
344 | [DMATEST_ET_OK] = "No errors", | |
345 | [DMATEST_ET_MAP_SRC] = "src mapping error", | |
346 | [DMATEST_ET_MAP_DST] = "dst mapping error", | |
347 | [DMATEST_ET_PREP] = "prep error", | |
348 | [DMATEST_ET_SUBMIT] = "submit error", | |
349 | [DMATEST_ET_TIMEOUT] = "test timed out", | |
350 | [DMATEST_ET_DMA_ERROR] = | |
351 | "got completion callback (DMA_ERROR)", | |
352 | [DMATEST_ET_DMA_IN_PROGRESS] = | |
353 | "got completion callback (DMA_IN_PROGRESS)", | |
354 | [DMATEST_ET_VERIFY] = "errors", | |
355 | }; | |
356 | static char buf[512]; | |
357 | ||
358 | snprintf(buf, sizeof(buf) - 1, | |
359 | "%s: #%u: %s with src_off=0x%x ""dst_off=0x%x len=0x%x (%lu)", | |
360 | name, tr->n, messages[tr->type], tr->src_off, tr->dst_off, | |
361 | tr->len, tr->data); | |
362 | ||
363 | return buf; | |
364 | } | |
365 | ||
366 | static int thread_result_add(struct dmatest_info *info, | |
367 | struct dmatest_result *r, enum dmatest_error_type type, | |
368 | unsigned int n, unsigned int src_off, unsigned int dst_off, | |
369 | unsigned int len, unsigned long data) | |
370 | { | |
371 | struct dmatest_thread_result *tr; | |
372 | ||
373 | tr = kzalloc(sizeof(*tr), GFP_KERNEL); | |
374 | if (!tr) | |
375 | return -ENOMEM; | |
376 | ||
377 | tr->type = type; | |
378 | tr->n = n; | |
379 | tr->src_off = src_off; | |
380 | tr->dst_off = dst_off; | |
381 | tr->len = len; | |
382 | tr->data = data; | |
383 | ||
384 | mutex_lock(&info->results_lock); | |
385 | list_add_tail(&tr->node, &r->results); | |
386 | mutex_unlock(&info->results_lock); | |
387 | ||
ad5278cd AS |
388 | if (tr->type == DMATEST_ET_OK) |
389 | pr_debug("%s\n", thread_result_get(r->name, tr)); | |
390 | else | |
391 | pr_warn("%s\n", thread_result_get(r->name, tr)); | |
392 | ||
95019c8c AS |
393 | return 0; |
394 | } | |
395 | ||
396 | static void result_free(struct dmatest_info *info, const char *name) | |
397 | { | |
398 | struct dmatest_result *r, *_r; | |
399 | ||
400 | mutex_lock(&info->results_lock); | |
401 | list_for_each_entry_safe(r, _r, &info->results, node) { | |
402 | struct dmatest_thread_result *tr, *_tr; | |
403 | ||
404 | if (name && strcmp(r->name, name)) | |
405 | continue; | |
406 | ||
407 | list_for_each_entry_safe(tr, _tr, &r->results, node) { | |
408 | list_del(&tr->node); | |
409 | kfree(tr); | |
410 | } | |
411 | ||
412 | kfree(r->name); | |
413 | list_del(&r->node); | |
414 | kfree(r); | |
415 | } | |
416 | ||
417 | mutex_unlock(&info->results_lock); | |
418 | } | |
419 | ||
420 | static struct dmatest_result *result_init(struct dmatest_info *info, | |
421 | const char *name) | |
422 | { | |
423 | struct dmatest_result *r; | |
424 | ||
425 | r = kzalloc(sizeof(*r), GFP_KERNEL); | |
426 | if (r) { | |
427 | r->name = kstrdup(name, GFP_KERNEL); | |
428 | INIT_LIST_HEAD(&r->results); | |
429 | mutex_lock(&info->results_lock); | |
430 | list_add_tail(&r->node, &info->results); | |
431 | mutex_unlock(&info->results_lock); | |
432 | } | |
433 | return r; | |
434 | } | |
435 | ||
4a776f0a HS |
436 | /* |
437 | * This function repeatedly tests DMA transfers of various lengths and | |
b54d5cb9 DW |
438 | * offsets for a given operation type until it is told to exit by |
439 | * kthread_stop(). There may be multiple threads running this function | |
440 | * in parallel for a single channel, and there may be multiple channels | |
441 | * being tested in parallel. | |
4a776f0a HS |
442 | * |
443 | * Before each test, the source and destination buffer is initialized | |
444 | * with a known pattern. This pattern is different depending on | |
445 | * whether it's in an area which is supposed to be copied or | |
446 | * overwritten, and different in the source and destination buffers. | |
447 | * So if the DMA engine doesn't copy exactly what we tell it to copy, | |
448 | * we'll notice. | |
449 | */ | |
450 | static int dmatest_func(void *data) | |
451 | { | |
adfa543e | 452 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(done_wait); |
4a776f0a | 453 | struct dmatest_thread *thread = data; |
adfa543e | 454 | struct dmatest_done done = { .wait = &done_wait }; |
e03e93a9 | 455 | struct dmatest_info *info; |
15b8a8ea | 456 | struct dmatest_params *params; |
4a776f0a | 457 | struct dma_chan *chan; |
8be9e32b | 458 | struct dma_device *dev; |
4a776f0a HS |
459 | const char *thread_name; |
460 | unsigned int src_off, dst_off, len; | |
461 | unsigned int error_count; | |
462 | unsigned int failed_tests = 0; | |
463 | unsigned int total_tests = 0; | |
464 | dma_cookie_t cookie; | |
465 | enum dma_status status; | |
b54d5cb9 | 466 | enum dma_ctrl_flags flags; |
945b5af3 | 467 | u8 *pq_coefs = NULL; |
4a776f0a | 468 | int ret; |
b54d5cb9 DW |
469 | int src_cnt; |
470 | int dst_cnt; | |
471 | int i; | |
95019c8c | 472 | struct dmatest_result *result; |
4a776f0a HS |
473 | |
474 | thread_name = current->comm; | |
adfa543e | 475 | set_freezable(); |
4a776f0a HS |
476 | |
477 | ret = -ENOMEM; | |
4a776f0a HS |
478 | |
479 | smp_rmb(); | |
e03e93a9 | 480 | info = thread->info; |
15b8a8ea | 481 | params = &info->params; |
4a776f0a | 482 | chan = thread->chan; |
8be9e32b | 483 | dev = chan->device; |
b54d5cb9 DW |
484 | if (thread->type == DMA_MEMCPY) |
485 | src_cnt = dst_cnt = 1; | |
486 | else if (thread->type == DMA_XOR) { | |
8be9e32b | 487 | /* force odd to ensure dst = src */ |
15b8a8ea | 488 | src_cnt = min_odd(params->xor_sources | 1, dev->max_xor); |
b54d5cb9 | 489 | dst_cnt = 1; |
58691d64 | 490 | } else if (thread->type == DMA_PQ) { |
8be9e32b | 491 | /* force odd to ensure dst = src */ |
15b8a8ea | 492 | src_cnt = min_odd(params->pq_sources | 1, dma_maxpq(dev, 0)); |
58691d64 | 493 | dst_cnt = 2; |
945b5af3 | 494 | |
15b8a8ea | 495 | pq_coefs = kmalloc(params->pq_sources+1, GFP_KERNEL); |
945b5af3 AS |
496 | if (!pq_coefs) |
497 | goto err_thread_type; | |
498 | ||
94de648d | 499 | for (i = 0; i < src_cnt; i++) |
58691d64 | 500 | pq_coefs[i] = 1; |
b54d5cb9 | 501 | } else |
945b5af3 | 502 | goto err_thread_type; |
b54d5cb9 | 503 | |
95019c8c AS |
504 | result = result_init(info, thread_name); |
505 | if (!result) | |
506 | goto err_srcs; | |
507 | ||
b54d5cb9 DW |
508 | thread->srcs = kcalloc(src_cnt+1, sizeof(u8 *), GFP_KERNEL); |
509 | if (!thread->srcs) | |
510 | goto err_srcs; | |
511 | for (i = 0; i < src_cnt; i++) { | |
15b8a8ea | 512 | thread->srcs[i] = kmalloc(params->buf_size, GFP_KERNEL); |
b54d5cb9 DW |
513 | if (!thread->srcs[i]) |
514 | goto err_srcbuf; | |
515 | } | |
516 | thread->srcs[i] = NULL; | |
517 | ||
518 | thread->dsts = kcalloc(dst_cnt+1, sizeof(u8 *), GFP_KERNEL); | |
519 | if (!thread->dsts) | |
520 | goto err_dsts; | |
521 | for (i = 0; i < dst_cnt; i++) { | |
15b8a8ea | 522 | thread->dsts[i] = kmalloc(params->buf_size, GFP_KERNEL); |
b54d5cb9 DW |
523 | if (!thread->dsts[i]) |
524 | goto err_dstbuf; | |
525 | } | |
526 | thread->dsts[i] = NULL; | |
527 | ||
e44e0aa3 DW |
528 | set_user_nice(current, 10); |
529 | ||
b203bd3f | 530 | /* |
d1cab34c | 531 | * src and dst buffers are freed by ourselves below |
b203bd3f | 532 | */ |
0776ae7b | 533 | flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT; |
4a776f0a | 534 | |
0a2ff57d | 535 | while (!kthread_should_stop() |
15b8a8ea | 536 | && !(params->iterations && total_tests >= params->iterations)) { |
b54d5cb9 DW |
537 | struct dma_async_tx_descriptor *tx = NULL; |
538 | dma_addr_t dma_srcs[src_cnt]; | |
539 | dma_addr_t dma_dsts[dst_cnt]; | |
83544ae9 | 540 | u8 align = 0; |
d86be86e | 541 | |
4a776f0a HS |
542 | total_tests++; |
543 | ||
83544ae9 DW |
544 | /* honor alignment restrictions */ |
545 | if (thread->type == DMA_MEMCPY) | |
546 | align = dev->copy_align; | |
547 | else if (thread->type == DMA_XOR) | |
548 | align = dev->xor_align; | |
549 | else if (thread->type == DMA_PQ) | |
550 | align = dev->pq_align; | |
551 | ||
15b8a8ea | 552 | if (1 << align > params->buf_size) { |
cfe4f275 | 553 | pr_err("%u-byte buffer too small for %d-byte alignment\n", |
15b8a8ea | 554 | params->buf_size, 1 << align); |
cfe4f275 GL |
555 | break; |
556 | } | |
557 | ||
15b8a8ea | 558 | len = dmatest_random() % params->buf_size + 1; |
83544ae9 | 559 | len = (len >> align) << align; |
cfe4f275 GL |
560 | if (!len) |
561 | len = 1 << align; | |
15b8a8ea AS |
562 | src_off = dmatest_random() % (params->buf_size - len + 1); |
563 | dst_off = dmatest_random() % (params->buf_size - len + 1); | |
cfe4f275 | 564 | |
83544ae9 DW |
565 | src_off = (src_off >> align) << align; |
566 | dst_off = (dst_off >> align) << align; | |
567 | ||
15b8a8ea AS |
568 | dmatest_init_srcs(thread->srcs, src_off, len, params->buf_size); |
569 | dmatest_init_dsts(thread->dsts, dst_off, len, params->buf_size); | |
4a776f0a | 570 | |
b54d5cb9 DW |
571 | for (i = 0; i < src_cnt; i++) { |
572 | u8 *buf = thread->srcs[i] + src_off; | |
573 | ||
574 | dma_srcs[i] = dma_map_single(dev->dev, buf, len, | |
575 | DMA_TO_DEVICE); | |
afde3be1 AS |
576 | ret = dma_mapping_error(dev->dev, dma_srcs[i]); |
577 | if (ret) { | |
578 | unmap_src(dev->dev, dma_srcs, len, i); | |
95019c8c AS |
579 | thread_result_add(info, result, |
580 | DMATEST_ET_MAP_SRC, | |
581 | total_tests, src_off, dst_off, | |
582 | len, ret); | |
afde3be1 AS |
583 | failed_tests++; |
584 | continue; | |
585 | } | |
b54d5cb9 | 586 | } |
d86be86e | 587 | /* map with DMA_BIDIRECTIONAL to force writeback/invalidate */ |
b54d5cb9 DW |
588 | for (i = 0; i < dst_cnt; i++) { |
589 | dma_dsts[i] = dma_map_single(dev->dev, thread->dsts[i], | |
15b8a8ea | 590 | params->buf_size, |
b54d5cb9 | 591 | DMA_BIDIRECTIONAL); |
afde3be1 AS |
592 | ret = dma_mapping_error(dev->dev, dma_dsts[i]); |
593 | if (ret) { | |
594 | unmap_src(dev->dev, dma_srcs, len, src_cnt); | |
15b8a8ea AS |
595 | unmap_dst(dev->dev, dma_dsts, params->buf_size, |
596 | i); | |
95019c8c AS |
597 | thread_result_add(info, result, |
598 | DMATEST_ET_MAP_DST, | |
599 | total_tests, src_off, dst_off, | |
600 | len, ret); | |
afde3be1 AS |
601 | failed_tests++; |
602 | continue; | |
603 | } | |
b54d5cb9 DW |
604 | } |
605 | ||
606 | if (thread->type == DMA_MEMCPY) | |
607 | tx = dev->device_prep_dma_memcpy(chan, | |
608 | dma_dsts[0] + dst_off, | |
609 | dma_srcs[0], len, | |
610 | flags); | |
611 | else if (thread->type == DMA_XOR) | |
612 | tx = dev->device_prep_dma_xor(chan, | |
613 | dma_dsts[0] + dst_off, | |
67b9124f | 614 | dma_srcs, src_cnt, |
b54d5cb9 | 615 | len, flags); |
58691d64 DW |
616 | else if (thread->type == DMA_PQ) { |
617 | dma_addr_t dma_pq[dst_cnt]; | |
618 | ||
619 | for (i = 0; i < dst_cnt; i++) | |
620 | dma_pq[i] = dma_dsts[i] + dst_off; | |
621 | tx = dev->device_prep_dma_pq(chan, dma_pq, dma_srcs, | |
94de648d | 622 | src_cnt, pq_coefs, |
58691d64 DW |
623 | len, flags); |
624 | } | |
d86be86e | 625 | |
d86be86e | 626 | if (!tx) { |
632fd283 | 627 | unmap_src(dev->dev, dma_srcs, len, src_cnt); |
15b8a8ea AS |
628 | unmap_dst(dev->dev, dma_dsts, params->buf_size, |
629 | dst_cnt); | |
95019c8c AS |
630 | thread_result_add(info, result, DMATEST_ET_PREP, |
631 | total_tests, src_off, dst_off, | |
632 | len, 0); | |
d86be86e AN |
633 | msleep(100); |
634 | failed_tests++; | |
635 | continue; | |
636 | } | |
e44e0aa3 | 637 | |
adfa543e | 638 | done.done = false; |
e44e0aa3 | 639 | tx->callback = dmatest_callback; |
adfa543e | 640 | tx->callback_param = &done; |
d86be86e AN |
641 | cookie = tx->tx_submit(tx); |
642 | ||
4a776f0a | 643 | if (dma_submit_error(cookie)) { |
95019c8c AS |
644 | thread_result_add(info, result, DMATEST_ET_SUBMIT, |
645 | total_tests, src_off, dst_off, | |
646 | len, cookie); | |
4a776f0a HS |
647 | msleep(100); |
648 | failed_tests++; | |
649 | continue; | |
650 | } | |
b54d5cb9 | 651 | dma_async_issue_pending(chan); |
4a776f0a | 652 | |
bcc567e3 | 653 | wait_event_freezable_timeout(done_wait, done.done, |
15b8a8ea | 654 | msecs_to_jiffies(params->timeout)); |
981ed70d | 655 | |
e44e0aa3 | 656 | status = dma_async_is_tx_complete(chan, cookie, NULL, NULL); |
4a776f0a | 657 | |
adfa543e TH |
658 | if (!done.done) { |
659 | /* | |
660 | * We're leaving the timed out dma operation with | |
661 | * dangling pointer to done_wait. To make this | |
662 | * correct, we'll need to allocate wait_done for | |
663 | * each test iteration and perform "who's gonna | |
664 | * free it this time?" dancing. For now, just | |
665 | * leave it dangling. | |
666 | */ | |
95019c8c AS |
667 | thread_result_add(info, result, DMATEST_ET_TIMEOUT, |
668 | total_tests, src_off, dst_off, | |
669 | len, 0); | |
e44e0aa3 DW |
670 | failed_tests++; |
671 | continue; | |
672 | } else if (status != DMA_SUCCESS) { | |
95019c8c AS |
673 | enum dmatest_error_type type = (status == DMA_ERROR) ? |
674 | DMATEST_ET_DMA_ERROR : DMATEST_ET_DMA_IN_PROGRESS; | |
675 | thread_result_add(info, result, type, | |
676 | total_tests, src_off, dst_off, | |
677 | len, status); | |
4a776f0a HS |
678 | failed_tests++; |
679 | continue; | |
680 | } | |
e44e0aa3 | 681 | |
d1cab34c BZ |
682 | /* Unmap by myself */ |
683 | unmap_src(dev->dev, dma_srcs, len, src_cnt); | |
15b8a8ea | 684 | unmap_dst(dev->dev, dma_dsts, params->buf_size, dst_cnt); |
4a776f0a HS |
685 | |
686 | error_count = 0; | |
687 | ||
688 | pr_debug("%s: verifying source buffer...\n", thread_name); | |
7b610178 | 689 | error_count += dmatest_verify(thread->srcs, 0, src_off, |
4a776f0a | 690 | 0, PATTERN_SRC, true); |
7b610178 DW |
691 | error_count += dmatest_verify(thread->srcs, src_off, |
692 | src_off + len, src_off, | |
693 | PATTERN_SRC | PATTERN_COPY, true); | |
694 | error_count += dmatest_verify(thread->srcs, src_off + len, | |
695 | params->buf_size, src_off + len, | |
696 | PATTERN_SRC, true); | |
697 | ||
698 | pr_debug("%s: verifying dest buffer...\n", | |
699 | thread->task->comm); | |
700 | error_count += dmatest_verify(thread->dsts, 0, dst_off, | |
4a776f0a | 701 | 0, PATTERN_DST, false); |
7b610178 DW |
702 | error_count += dmatest_verify(thread->dsts, dst_off, |
703 | dst_off + len, src_off, | |
704 | PATTERN_SRC | PATTERN_COPY, false); | |
705 | error_count += dmatest_verify(thread->dsts, dst_off + len, | |
706 | params->buf_size, dst_off + len, | |
707 | PATTERN_DST, false); | |
4a776f0a HS |
708 | |
709 | if (error_count) { | |
95019c8c AS |
710 | thread_result_add(info, result, DMATEST_ET_VERIFY, |
711 | total_tests, src_off, dst_off, | |
712 | len, error_count); | |
4a776f0a HS |
713 | failed_tests++; |
714 | } else { | |
95019c8c AS |
715 | thread_result_add(info, result, DMATEST_ET_OK, |
716 | total_tests, src_off, dst_off, | |
717 | len, 0); | |
4a776f0a HS |
718 | } |
719 | } | |
720 | ||
721 | ret = 0; | |
b54d5cb9 DW |
722 | for (i = 0; thread->dsts[i]; i++) |
723 | kfree(thread->dsts[i]); | |
4a776f0a | 724 | err_dstbuf: |
b54d5cb9 DW |
725 | kfree(thread->dsts); |
726 | err_dsts: | |
727 | for (i = 0; thread->srcs[i]; i++) | |
728 | kfree(thread->srcs[i]); | |
4a776f0a | 729 | err_srcbuf: |
b54d5cb9 DW |
730 | kfree(thread->srcs); |
731 | err_srcs: | |
945b5af3 AS |
732 | kfree(pq_coefs); |
733 | err_thread_type: | |
4a776f0a HS |
734 | pr_notice("%s: terminating after %u tests, %u failures (status %d)\n", |
735 | thread_name, total_tests, failed_tests, ret); | |
0a2ff57d | 736 | |
9704efaa | 737 | /* terminate all transfers on specified channels */ |
5e034f7b SH |
738 | if (ret) |
739 | dmaengine_terminate_all(chan); | |
740 | ||
3e5ccd86 AS |
741 | thread->done = true; |
742 | ||
15b8a8ea | 743 | if (params->iterations > 0) |
0a2ff57d | 744 | while (!kthread_should_stop()) { |
b953df7c | 745 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wait_dmatest_exit); |
0a2ff57d NF |
746 | interruptible_sleep_on(&wait_dmatest_exit); |
747 | } | |
748 | ||
4a776f0a HS |
749 | return ret; |
750 | } | |
751 | ||
752 | static void dmatest_cleanup_channel(struct dmatest_chan *dtc) | |
753 | { | |
754 | struct dmatest_thread *thread; | |
755 | struct dmatest_thread *_thread; | |
756 | int ret; | |
757 | ||
758 | list_for_each_entry_safe(thread, _thread, &dtc->threads, node) { | |
759 | ret = kthread_stop(thread->task); | |
760 | pr_debug("dmatest: thread %s exited with status %d\n", | |
761 | thread->task->comm, ret); | |
762 | list_del(&thread->node); | |
763 | kfree(thread); | |
764 | } | |
9704efaa VK |
765 | |
766 | /* terminate all transfers on specified channels */ | |
944ea4dd | 767 | dmaengine_terminate_all(dtc->chan); |
9704efaa | 768 | |
4a776f0a HS |
769 | kfree(dtc); |
770 | } | |
771 | ||
e03e93a9 AS |
772 | static int dmatest_add_threads(struct dmatest_info *info, |
773 | struct dmatest_chan *dtc, enum dma_transaction_type type) | |
4a776f0a | 774 | { |
15b8a8ea | 775 | struct dmatest_params *params = &info->params; |
b54d5cb9 DW |
776 | struct dmatest_thread *thread; |
777 | struct dma_chan *chan = dtc->chan; | |
778 | char *op; | |
779 | unsigned int i; | |
4a776f0a | 780 | |
b54d5cb9 DW |
781 | if (type == DMA_MEMCPY) |
782 | op = "copy"; | |
783 | else if (type == DMA_XOR) | |
784 | op = "xor"; | |
58691d64 DW |
785 | else if (type == DMA_PQ) |
786 | op = "pq"; | |
b54d5cb9 DW |
787 | else |
788 | return -EINVAL; | |
4a776f0a | 789 | |
15b8a8ea | 790 | for (i = 0; i < params->threads_per_chan; i++) { |
4a776f0a HS |
791 | thread = kzalloc(sizeof(struct dmatest_thread), GFP_KERNEL); |
792 | if (!thread) { | |
b54d5cb9 DW |
793 | pr_warning("dmatest: No memory for %s-%s%u\n", |
794 | dma_chan_name(chan), op, i); | |
795 | ||
4a776f0a HS |
796 | break; |
797 | } | |
e03e93a9 | 798 | thread->info = info; |
4a776f0a | 799 | thread->chan = dtc->chan; |
b54d5cb9 | 800 | thread->type = type; |
4a776f0a | 801 | smp_wmb(); |
b54d5cb9 DW |
802 | thread->task = kthread_run(dmatest_func, thread, "%s-%s%u", |
803 | dma_chan_name(chan), op, i); | |
4a776f0a | 804 | if (IS_ERR(thread->task)) { |
b54d5cb9 DW |
805 | pr_warning("dmatest: Failed to run thread %s-%s%u\n", |
806 | dma_chan_name(chan), op, i); | |
4a776f0a HS |
807 | kfree(thread); |
808 | break; | |
809 | } | |
810 | ||
811 | /* srcbuf and dstbuf are allocated by the thread itself */ | |
812 | ||
813 | list_add_tail(&thread->node, &dtc->threads); | |
814 | } | |
815 | ||
b54d5cb9 DW |
816 | return i; |
817 | } | |
818 | ||
e03e93a9 AS |
819 | static int dmatest_add_channel(struct dmatest_info *info, |
820 | struct dma_chan *chan) | |
b54d5cb9 DW |
821 | { |
822 | struct dmatest_chan *dtc; | |
823 | struct dma_device *dma_dev = chan->device; | |
824 | unsigned int thread_count = 0; | |
b9033e68 | 825 | int cnt; |
b54d5cb9 DW |
826 | |
827 | dtc = kmalloc(sizeof(struct dmatest_chan), GFP_KERNEL); | |
828 | if (!dtc) { | |
829 | pr_warning("dmatest: No memory for %s\n", dma_chan_name(chan)); | |
830 | return -ENOMEM; | |
831 | } | |
832 | ||
833 | dtc->chan = chan; | |
834 | INIT_LIST_HEAD(&dtc->threads); | |
835 | ||
836 | if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) { | |
e03e93a9 | 837 | cnt = dmatest_add_threads(info, dtc, DMA_MEMCPY); |
f1aef8b6 | 838 | thread_count += cnt > 0 ? cnt : 0; |
b54d5cb9 DW |
839 | } |
840 | if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) { | |
e03e93a9 | 841 | cnt = dmatest_add_threads(info, dtc, DMA_XOR); |
f1aef8b6 | 842 | thread_count += cnt > 0 ? cnt : 0; |
b54d5cb9 | 843 | } |
58691d64 | 844 | if (dma_has_cap(DMA_PQ, dma_dev->cap_mask)) { |
e03e93a9 | 845 | cnt = dmatest_add_threads(info, dtc, DMA_PQ); |
d07a74a5 | 846 | thread_count += cnt > 0 ? cnt : 0; |
58691d64 | 847 | } |
b54d5cb9 DW |
848 | |
849 | pr_info("dmatest: Started %u threads using %s\n", | |
850 | thread_count, dma_chan_name(chan)); | |
4a776f0a | 851 | |
838cc704 AS |
852 | list_add_tail(&dtc->node, &info->channels); |
853 | info->nr_channels++; | |
4a776f0a | 854 | |
33df8ca0 | 855 | return 0; |
4a776f0a HS |
856 | } |
857 | ||
7dd60251 | 858 | static bool filter(struct dma_chan *chan, void *param) |
4a776f0a | 859 | { |
15b8a8ea | 860 | struct dmatest_params *params = param; |
e03e93a9 | 861 | |
15b8a8ea AS |
862 | if (!dmatest_match_channel(params, chan) || |
863 | !dmatest_match_device(params, chan->device)) | |
7dd60251 | 864 | return false; |
33df8ca0 | 865 | else |
7dd60251 | 866 | return true; |
4a776f0a HS |
867 | } |
868 | ||
851b7e16 | 869 | static int __run_threaded_test(struct dmatest_info *info) |
4a776f0a | 870 | { |
33df8ca0 DW |
871 | dma_cap_mask_t mask; |
872 | struct dma_chan *chan; | |
15b8a8ea | 873 | struct dmatest_params *params = &info->params; |
33df8ca0 DW |
874 | int err = 0; |
875 | ||
876 | dma_cap_zero(mask); | |
877 | dma_cap_set(DMA_MEMCPY, mask); | |
878 | for (;;) { | |
15b8a8ea | 879 | chan = dma_request_channel(mask, filter, params); |
33df8ca0 | 880 | if (chan) { |
e03e93a9 | 881 | err = dmatest_add_channel(info, chan); |
c56c81ab | 882 | if (err) { |
33df8ca0 DW |
883 | dma_release_channel(chan); |
884 | break; /* add_channel failed, punt */ | |
885 | } | |
886 | } else | |
887 | break; /* no more channels available */ | |
15b8a8ea AS |
888 | if (params->max_channels && |
889 | info->nr_channels >= params->max_channels) | |
33df8ca0 DW |
890 | break; /* we have all we need */ |
891 | } | |
33df8ca0 | 892 | return err; |
4a776f0a | 893 | } |
4a776f0a | 894 | |
851b7e16 AS |
895 | #ifndef MODULE |
896 | static int run_threaded_test(struct dmatest_info *info) | |
897 | { | |
898 | int ret; | |
899 | ||
900 | mutex_lock(&info->lock); | |
901 | ret = __run_threaded_test(info); | |
902 | mutex_unlock(&info->lock); | |
903 | return ret; | |
904 | } | |
905 | #endif | |
906 | ||
907 | static void __stop_threaded_test(struct dmatest_info *info) | |
4a776f0a | 908 | { |
33df8ca0 | 909 | struct dmatest_chan *dtc, *_dtc; |
7cbd4877 | 910 | struct dma_chan *chan; |
33df8ca0 | 911 | |
838cc704 | 912 | list_for_each_entry_safe(dtc, _dtc, &info->channels, node) { |
33df8ca0 | 913 | list_del(&dtc->node); |
7cbd4877 | 914 | chan = dtc->chan; |
33df8ca0 | 915 | dmatest_cleanup_channel(dtc); |
838cc704 | 916 | pr_debug("dmatest: dropped channel %s\n", dma_chan_name(chan)); |
7cbd4877 | 917 | dma_release_channel(chan); |
33df8ca0 | 918 | } |
838cc704 AS |
919 | |
920 | info->nr_channels = 0; | |
4a776f0a | 921 | } |
e03e93a9 | 922 | |
851b7e16 AS |
923 | static void stop_threaded_test(struct dmatest_info *info) |
924 | { | |
925 | mutex_lock(&info->lock); | |
926 | __stop_threaded_test(info); | |
927 | mutex_unlock(&info->lock); | |
928 | } | |
929 | ||
930 | static int __restart_threaded_test(struct dmatest_info *info, bool run) | |
931 | { | |
932 | struct dmatest_params *params = &info->params; | |
851b7e16 AS |
933 | |
934 | /* Stop any running test first */ | |
935 | __stop_threaded_test(info); | |
936 | ||
937 | if (run == false) | |
938 | return 0; | |
939 | ||
95019c8c AS |
940 | /* Clear results from previous run */ |
941 | result_free(info, NULL); | |
942 | ||
851b7e16 | 943 | /* Copy test parameters */ |
a6c268d0 AS |
944 | params->buf_size = test_buf_size; |
945 | strlcpy(params->channel, strim(test_channel), sizeof(params->channel)); | |
946 | strlcpy(params->device, strim(test_device), sizeof(params->device)); | |
947 | params->threads_per_chan = threads_per_chan; | |
948 | params->max_channels = max_channels; | |
949 | params->iterations = iterations; | |
950 | params->xor_sources = xor_sources; | |
951 | params->pq_sources = pq_sources; | |
952 | params->timeout = timeout; | |
851b7e16 AS |
953 | |
954 | /* Run test with new parameters */ | |
bcc567e3 AS |
955 | return __run_threaded_test(info); |
956 | } | |
957 | ||
958 | static bool __is_threaded_test_run(struct dmatest_info *info) | |
959 | { | |
960 | struct dmatest_chan *dtc; | |
961 | ||
962 | list_for_each_entry(dtc, &info->channels, node) { | |
963 | struct dmatest_thread *thread; | |
964 | ||
965 | list_for_each_entry(thread, &dtc->threads, node) { | |
966 | if (!thread->done) | |
967 | return true; | |
968 | } | |
851b7e16 AS |
969 | } |
970 | ||
bcc567e3 | 971 | return false; |
851b7e16 AS |
972 | } |
973 | ||
851b7e16 AS |
974 | static ssize_t dtf_read_run(struct file *file, char __user *user_buf, |
975 | size_t count, loff_t *ppos) | |
976 | { | |
977 | struct dmatest_info *info = file->private_data; | |
978 | char buf[3]; | |
979 | ||
980 | mutex_lock(&info->lock); | |
3e5ccd86 | 981 | |
bcc567e3 | 982 | if (__is_threaded_test_run(info)) { |
851b7e16 | 983 | buf[0] = 'Y'; |
3e5ccd86 AS |
984 | } else { |
985 | __stop_threaded_test(info); | |
851b7e16 | 986 | buf[0] = 'N'; |
3e5ccd86 AS |
987 | } |
988 | ||
851b7e16 AS |
989 | mutex_unlock(&info->lock); |
990 | buf[1] = '\n'; | |
991 | buf[2] = 0x00; | |
992 | return simple_read_from_buffer(user_buf, count, ppos, buf, 2); | |
993 | } | |
994 | ||
995 | static ssize_t dtf_write_run(struct file *file, const char __user *user_buf, | |
996 | size_t count, loff_t *ppos) | |
997 | { | |
998 | struct dmatest_info *info = file->private_data; | |
999 | char buf[16]; | |
1000 | bool bv; | |
1001 | int ret = 0; | |
1002 | ||
1003 | if (copy_from_user(buf, user_buf, min(count, (sizeof(buf) - 1)))) | |
1004 | return -EFAULT; | |
1005 | ||
1006 | if (strtobool(buf, &bv) == 0) { | |
1007 | mutex_lock(&info->lock); | |
bcc567e3 AS |
1008 | |
1009 | if (__is_threaded_test_run(info)) | |
1010 | ret = -EBUSY; | |
1011 | else | |
1012 | ret = __restart_threaded_test(info, bv); | |
1013 | ||
851b7e16 AS |
1014 | mutex_unlock(&info->lock); |
1015 | } | |
1016 | ||
1017 | return ret ? ret : count; | |
1018 | } | |
1019 | ||
1020 | static const struct file_operations dtf_run_fops = { | |
1021 | .read = dtf_read_run, | |
1022 | .write = dtf_write_run, | |
1023 | .open = simple_open, | |
1024 | .llseek = default_llseek, | |
1025 | }; | |
1026 | ||
95019c8c AS |
1027 | static int dtf_results_show(struct seq_file *sf, void *data) |
1028 | { | |
1029 | struct dmatest_info *info = sf->private; | |
1030 | struct dmatest_result *result; | |
1031 | struct dmatest_thread_result *tr; | |
1032 | ||
1033 | mutex_lock(&info->results_lock); | |
1034 | list_for_each_entry(result, &info->results, node) { | |
7b610178 | 1035 | list_for_each_entry(tr, &result->results, node) |
95019c8c AS |
1036 | seq_printf(sf, "%s\n", |
1037 | thread_result_get(result->name, tr)); | |
1038 | } | |
1039 | ||
1040 | mutex_unlock(&info->results_lock); | |
1041 | return 0; | |
1042 | } | |
1043 | ||
1044 | static int dtf_results_open(struct inode *inode, struct file *file) | |
1045 | { | |
1046 | return single_open(file, dtf_results_show, inode->i_private); | |
1047 | } | |
1048 | ||
1049 | static const struct file_operations dtf_results_fops = { | |
1050 | .open = dtf_results_open, | |
1051 | .read = seq_read, | |
1052 | .llseek = seq_lseek, | |
1053 | .release = single_release, | |
1054 | }; | |
1055 | ||
851b7e16 AS |
1056 | static int dmatest_register_dbgfs(struct dmatest_info *info) |
1057 | { | |
1058 | struct dentry *d; | |
851b7e16 AS |
1059 | |
1060 | d = debugfs_create_dir("dmatest", NULL); | |
1061 | if (IS_ERR(d)) | |
1062 | return PTR_ERR(d); | |
1063 | if (!d) | |
1064 | goto err_root; | |
1065 | ||
1066 | info->root = d; | |
1067 | ||
851b7e16 | 1068 | /* Run or stop threaded test */ |
e24775e4 AS |
1069 | debugfs_create_file("run", S_IWUSR | S_IRUGO, info->root, info, |
1070 | &dtf_run_fops); | |
851b7e16 | 1071 | |
95019c8c | 1072 | /* Results of test in progress */ |
e24775e4 AS |
1073 | debugfs_create_file("results", S_IRUGO, info->root, info, |
1074 | &dtf_results_fops); | |
95019c8c | 1075 | |
851b7e16 AS |
1076 | return 0; |
1077 | ||
851b7e16 AS |
1078 | err_root: |
1079 | pr_err("dmatest: Failed to initialize debugfs\n"); | |
e24775e4 | 1080 | return -ENOMEM; |
851b7e16 AS |
1081 | } |
1082 | ||
e03e93a9 AS |
1083 | static int __init dmatest_init(void) |
1084 | { | |
1085 | struct dmatest_info *info = &test_info; | |
851b7e16 | 1086 | int ret; |
e03e93a9 AS |
1087 | |
1088 | memset(info, 0, sizeof(*info)); | |
1089 | ||
851b7e16 | 1090 | mutex_init(&info->lock); |
838cc704 AS |
1091 | INIT_LIST_HEAD(&info->channels); |
1092 | ||
95019c8c AS |
1093 | mutex_init(&info->results_lock); |
1094 | INIT_LIST_HEAD(&info->results); | |
1095 | ||
851b7e16 AS |
1096 | ret = dmatest_register_dbgfs(info); |
1097 | if (ret) | |
1098 | return ret; | |
1099 | ||
1100 | #ifdef MODULE | |
1101 | return 0; | |
1102 | #else | |
e03e93a9 | 1103 | return run_threaded_test(info); |
851b7e16 | 1104 | #endif |
e03e93a9 AS |
1105 | } |
1106 | /* when compiled-in wait for drivers to load first */ | |
1107 | late_initcall(dmatest_init); | |
1108 | ||
1109 | static void __exit dmatest_exit(void) | |
1110 | { | |
1111 | struct dmatest_info *info = &test_info; | |
1112 | ||
851b7e16 | 1113 | debugfs_remove_recursive(info->root); |
e03e93a9 | 1114 | stop_threaded_test(info); |
95019c8c | 1115 | result_free(info, NULL); |
e03e93a9 | 1116 | } |
4a776f0a HS |
1117 | module_exit(dmatest_exit); |
1118 | ||
e05503ef | 1119 | MODULE_AUTHOR("Haavard Skinnemoen (Atmel)"); |
4a776f0a | 1120 | MODULE_LICENSE("GPL v2"); |