Commit | Line | Data |
---|---|---|
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, | |
d86b2f29 AS |
101 | DMATEST_ET_VERIFY_BUF, |
102 | }; | |
103 | ||
104 | struct dmatest_verify_buffer { | |
105 | unsigned int index; | |
106 | u8 expected; | |
107 | u8 actual; | |
108 | }; | |
109 | ||
110 | struct dmatest_verify_result { | |
111 | unsigned int error_count; | |
112 | struct dmatest_verify_buffer data[MAX_ERROR_COUNT]; | |
113 | u8 pattern; | |
114 | bool is_srcbuf; | |
95019c8c AS |
115 | }; |
116 | ||
117 | struct dmatest_thread_result { | |
118 | struct list_head node; | |
119 | unsigned int n; | |
120 | unsigned int src_off; | |
121 | unsigned int dst_off; | |
122 | unsigned int len; | |
123 | enum dmatest_error_type type; | |
124 | union { | |
d86b2f29 AS |
125 | unsigned long data; |
126 | dma_cookie_t cookie; | |
127 | enum dma_status status; | |
128 | int error; | |
129 | struct dmatest_verify_result *vr; | |
95019c8c AS |
130 | }; |
131 | }; | |
132 | ||
133 | struct dmatest_result { | |
134 | struct list_head node; | |
135 | char *name; | |
136 | struct list_head results; | |
137 | }; | |
138 | ||
e03e93a9 AS |
139 | struct dmatest_info; |
140 | ||
4a776f0a HS |
141 | struct dmatest_thread { |
142 | struct list_head node; | |
e03e93a9 | 143 | struct dmatest_info *info; |
4a776f0a HS |
144 | struct task_struct *task; |
145 | struct dma_chan *chan; | |
b54d5cb9 DW |
146 | u8 **srcs; |
147 | u8 **dsts; | |
148 | enum dma_transaction_type type; | |
3e5ccd86 | 149 | bool done; |
4a776f0a HS |
150 | }; |
151 | ||
152 | struct dmatest_chan { | |
153 | struct list_head node; | |
154 | struct dma_chan *chan; | |
155 | struct list_head threads; | |
156 | }; | |
157 | ||
e03e93a9 | 158 | /** |
15b8a8ea | 159 | * struct dmatest_params - test parameters. |
e03e93a9 AS |
160 | * @buf_size: size of the memcpy test buffer |
161 | * @channel: bus ID of the channel to test | |
162 | * @device: bus ID of the DMA Engine to test | |
163 | * @threads_per_chan: number of threads to start per channel | |
164 | * @max_channels: maximum number of channels to use | |
165 | * @iterations: iterations before stopping test | |
166 | * @xor_sources: number of xor source buffers | |
167 | * @pq_sources: number of p+q source buffers | |
168 | * @timeout: transfer timeout in msec, -1 for infinite timeout | |
169 | */ | |
15b8a8ea | 170 | struct dmatest_params { |
e03e93a9 AS |
171 | unsigned int buf_size; |
172 | char channel[20]; | |
173 | char device[20]; | |
174 | unsigned int threads_per_chan; | |
175 | unsigned int max_channels; | |
176 | unsigned int iterations; | |
177 | unsigned int xor_sources; | |
178 | unsigned int pq_sources; | |
179 | int timeout; | |
15b8a8ea AS |
180 | }; |
181 | ||
182 | /** | |
183 | * struct dmatest_info - test information. | |
184 | * @params: test parameters | |
851b7e16 | 185 | * @lock: access protection to the fields of this structure |
15b8a8ea AS |
186 | */ |
187 | struct dmatest_info { | |
188 | /* Test parameters */ | |
189 | struct dmatest_params params; | |
838cc704 AS |
190 | |
191 | /* Internal state */ | |
192 | struct list_head channels; | |
193 | unsigned int nr_channels; | |
851b7e16 AS |
194 | struct mutex lock; |
195 | ||
196 | /* debugfs related stuff */ | |
197 | struct dentry *root; | |
95019c8c AS |
198 | |
199 | /* Test results */ | |
200 | struct list_head results; | |
201 | struct mutex results_lock; | |
e03e93a9 AS |
202 | }; |
203 | ||
204 | static struct dmatest_info test_info; | |
205 | ||
15b8a8ea | 206 | static bool dmatest_match_channel(struct dmatest_params *params, |
e03e93a9 | 207 | struct dma_chan *chan) |
4a776f0a | 208 | { |
15b8a8ea | 209 | if (params->channel[0] == '\0') |
4a776f0a | 210 | return true; |
15b8a8ea | 211 | return strcmp(dma_chan_name(chan), params->channel) == 0; |
4a776f0a HS |
212 | } |
213 | ||
15b8a8ea | 214 | static bool dmatest_match_device(struct dmatest_params *params, |
e03e93a9 | 215 | struct dma_device *device) |
4a776f0a | 216 | { |
15b8a8ea | 217 | if (params->device[0] == '\0') |
4a776f0a | 218 | return true; |
15b8a8ea | 219 | return strcmp(dev_name(device->dev), params->device) == 0; |
4a776f0a HS |
220 | } |
221 | ||
222 | static unsigned long dmatest_random(void) | |
223 | { | |
224 | unsigned long buf; | |
225 | ||
226 | get_random_bytes(&buf, sizeof(buf)); | |
227 | return buf; | |
228 | } | |
229 | ||
e03e93a9 AS |
230 | static void dmatest_init_srcs(u8 **bufs, unsigned int start, unsigned int len, |
231 | unsigned int buf_size) | |
4a776f0a HS |
232 | { |
233 | unsigned int i; | |
b54d5cb9 DW |
234 | u8 *buf; |
235 | ||
236 | for (; (buf = *bufs); bufs++) { | |
237 | for (i = 0; i < start; i++) | |
238 | buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK); | |
239 | for ( ; i < start + len; i++) | |
240 | buf[i] = PATTERN_SRC | PATTERN_COPY | |
c019894e | 241 | | (~i & PATTERN_COUNT_MASK); |
e03e93a9 | 242 | for ( ; i < buf_size; i++) |
b54d5cb9 DW |
243 | buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK); |
244 | buf++; | |
245 | } | |
4a776f0a HS |
246 | } |
247 | ||
e03e93a9 AS |
248 | static void dmatest_init_dsts(u8 **bufs, unsigned int start, unsigned int len, |
249 | unsigned int buf_size) | |
4a776f0a HS |
250 | { |
251 | unsigned int i; | |
b54d5cb9 DW |
252 | u8 *buf; |
253 | ||
254 | for (; (buf = *bufs); bufs++) { | |
255 | for (i = 0; i < start; i++) | |
256 | buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK); | |
257 | for ( ; i < start + len; i++) | |
258 | buf[i] = PATTERN_DST | PATTERN_OVERWRITE | |
259 | | (~i & PATTERN_COUNT_MASK); | |
e03e93a9 | 260 | for ( ; i < buf_size; i++) |
b54d5cb9 DW |
261 | buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK); |
262 | } | |
4a776f0a HS |
263 | } |
264 | ||
d86b2f29 AS |
265 | static unsigned int dmatest_verify(struct dmatest_verify_result *vr, u8 **bufs, |
266 | unsigned int start, unsigned int end, unsigned int counter, | |
267 | u8 pattern, bool is_srcbuf) | |
4a776f0a HS |
268 | { |
269 | unsigned int i; | |
270 | unsigned int error_count = 0; | |
271 | u8 actual; | |
b54d5cb9 DW |
272 | u8 expected; |
273 | u8 *buf; | |
274 | unsigned int counter_orig = counter; | |
d86b2f29 | 275 | struct dmatest_verify_buffer *vb; |
b54d5cb9 DW |
276 | |
277 | for (; (buf = *bufs); bufs++) { | |
278 | counter = counter_orig; | |
279 | for (i = start; i < end; i++) { | |
280 | actual = buf[i]; | |
281 | expected = pattern | (~counter & PATTERN_COUNT_MASK); | |
282 | if (actual != expected) { | |
d86b2f29 AS |
283 | if (error_count < MAX_ERROR_COUNT && vr) { |
284 | vb = &vr->data[error_count]; | |
285 | vb->index = i; | |
286 | vb->expected = expected; | |
287 | vb->actual = actual; | |
288 | } | |
b54d5cb9 DW |
289 | error_count++; |
290 | } | |
291 | counter++; | |
4a776f0a | 292 | } |
4a776f0a HS |
293 | } |
294 | ||
74b5c07a | 295 | if (error_count > MAX_ERROR_COUNT) |
4a776f0a | 296 | pr_warning("%s: %u errors suppressed\n", |
74b5c07a | 297 | current->comm, error_count - MAX_ERROR_COUNT); |
4a776f0a HS |
298 | |
299 | return error_count; | |
300 | } | |
301 | ||
adfa543e TH |
302 | /* poor man's completion - we want to use wait_event_freezable() on it */ |
303 | struct dmatest_done { | |
304 | bool done; | |
305 | wait_queue_head_t *wait; | |
306 | }; | |
307 | ||
308 | static void dmatest_callback(void *arg) | |
e44e0aa3 | 309 | { |
adfa543e TH |
310 | struct dmatest_done *done = arg; |
311 | ||
312 | done->done = true; | |
313 | wake_up_all(done->wait); | |
e44e0aa3 DW |
314 | } |
315 | ||
632fd283 AS |
316 | static inline void unmap_src(struct device *dev, dma_addr_t *addr, size_t len, |
317 | unsigned int count) | |
318 | { | |
319 | while (count--) | |
320 | dma_unmap_single(dev, addr[count], len, DMA_TO_DEVICE); | |
321 | } | |
322 | ||
323 | static inline void unmap_dst(struct device *dev, dma_addr_t *addr, size_t len, | |
324 | unsigned int count) | |
325 | { | |
326 | while (count--) | |
327 | dma_unmap_single(dev, addr[count], len, DMA_BIDIRECTIONAL); | |
328 | } | |
329 | ||
8be9e32b AM |
330 | static unsigned int min_odd(unsigned int x, unsigned int y) |
331 | { | |
332 | unsigned int val = min(x, y); | |
333 | ||
334 | return val % 2 ? val : val - 1; | |
335 | } | |
336 | ||
d86b2f29 AS |
337 | static char *verify_result_get_one(struct dmatest_verify_result *vr, |
338 | unsigned int i) | |
339 | { | |
340 | struct dmatest_verify_buffer *vb = &vr->data[i]; | |
341 | u8 diff = vb->actual ^ vr->pattern; | |
342 | static char buf[512]; | |
343 | char *msg; | |
344 | ||
345 | if (vr->is_srcbuf) | |
346 | msg = "srcbuf overwritten!"; | |
347 | else if ((vr->pattern & PATTERN_COPY) | |
348 | && (diff & (PATTERN_COPY | PATTERN_OVERWRITE))) | |
349 | msg = "dstbuf not copied!"; | |
350 | else if (diff & PATTERN_SRC) | |
351 | msg = "dstbuf was copied!"; | |
352 | else | |
353 | msg = "dstbuf mismatch!"; | |
354 | ||
355 | snprintf(buf, sizeof(buf) - 1, "%s [0x%x] Expected %02x, got %02x", msg, | |
356 | vb->index, vb->expected, vb->actual); | |
357 | ||
358 | return buf; | |
359 | } | |
360 | ||
95019c8c AS |
361 | static char *thread_result_get(const char *name, |
362 | struct dmatest_thread_result *tr) | |
363 | { | |
364 | static const char * const messages[] = { | |
365 | [DMATEST_ET_OK] = "No errors", | |
366 | [DMATEST_ET_MAP_SRC] = "src mapping error", | |
367 | [DMATEST_ET_MAP_DST] = "dst mapping error", | |
368 | [DMATEST_ET_PREP] = "prep error", | |
369 | [DMATEST_ET_SUBMIT] = "submit error", | |
370 | [DMATEST_ET_TIMEOUT] = "test timed out", | |
371 | [DMATEST_ET_DMA_ERROR] = | |
372 | "got completion callback (DMA_ERROR)", | |
373 | [DMATEST_ET_DMA_IN_PROGRESS] = | |
374 | "got completion callback (DMA_IN_PROGRESS)", | |
375 | [DMATEST_ET_VERIFY] = "errors", | |
d86b2f29 | 376 | [DMATEST_ET_VERIFY_BUF] = "verify errors", |
95019c8c AS |
377 | }; |
378 | static char buf[512]; | |
379 | ||
380 | snprintf(buf, sizeof(buf) - 1, | |
381 | "%s: #%u: %s with src_off=0x%x ""dst_off=0x%x len=0x%x (%lu)", | |
382 | name, tr->n, messages[tr->type], tr->src_off, tr->dst_off, | |
383 | tr->len, tr->data); | |
384 | ||
385 | return buf; | |
386 | } | |
387 | ||
388 | static int thread_result_add(struct dmatest_info *info, | |
389 | struct dmatest_result *r, enum dmatest_error_type type, | |
390 | unsigned int n, unsigned int src_off, unsigned int dst_off, | |
391 | unsigned int len, unsigned long data) | |
392 | { | |
393 | struct dmatest_thread_result *tr; | |
394 | ||
395 | tr = kzalloc(sizeof(*tr), GFP_KERNEL); | |
396 | if (!tr) | |
397 | return -ENOMEM; | |
398 | ||
399 | tr->type = type; | |
400 | tr->n = n; | |
401 | tr->src_off = src_off; | |
402 | tr->dst_off = dst_off; | |
403 | tr->len = len; | |
404 | tr->data = data; | |
405 | ||
406 | mutex_lock(&info->results_lock); | |
407 | list_add_tail(&tr->node, &r->results); | |
408 | mutex_unlock(&info->results_lock); | |
409 | ||
ad5278cd AS |
410 | if (tr->type == DMATEST_ET_OK) |
411 | pr_debug("%s\n", thread_result_get(r->name, tr)); | |
412 | else | |
413 | pr_warn("%s\n", thread_result_get(r->name, tr)); | |
414 | ||
95019c8c AS |
415 | return 0; |
416 | } | |
417 | ||
d86b2f29 AS |
418 | static unsigned int verify_result_add(struct dmatest_info *info, |
419 | struct dmatest_result *r, unsigned int n, | |
420 | unsigned int src_off, unsigned int dst_off, unsigned int len, | |
421 | u8 **bufs, int whence, unsigned int counter, u8 pattern, | |
422 | bool is_srcbuf) | |
423 | { | |
424 | struct dmatest_verify_result *vr; | |
425 | unsigned int error_count; | |
426 | unsigned int buf_off = is_srcbuf ? src_off : dst_off; | |
427 | unsigned int start, end; | |
428 | ||
429 | if (whence < 0) { | |
430 | start = 0; | |
431 | end = buf_off; | |
432 | } else if (whence > 0) { | |
433 | start = buf_off + len; | |
434 | end = info->params.buf_size; | |
435 | } else { | |
436 | start = buf_off; | |
437 | end = buf_off + len; | |
438 | } | |
439 | ||
440 | vr = kmalloc(sizeof(*vr), GFP_KERNEL); | |
441 | if (!vr) { | |
442 | pr_warn("dmatest: No memory to store verify result\n"); | |
443 | return dmatest_verify(NULL, bufs, start, end, counter, pattern, | |
444 | is_srcbuf); | |
445 | } | |
446 | ||
447 | vr->pattern = pattern; | |
448 | vr->is_srcbuf = is_srcbuf; | |
449 | ||
450 | error_count = dmatest_verify(vr, bufs, start, end, counter, pattern, | |
451 | is_srcbuf); | |
452 | if (error_count) { | |
453 | vr->error_count = error_count; | |
454 | thread_result_add(info, r, DMATEST_ET_VERIFY_BUF, n, src_off, | |
455 | dst_off, len, (unsigned long)vr); | |
456 | return error_count; | |
457 | } | |
458 | ||
459 | kfree(vr); | |
460 | return 0; | |
461 | } | |
462 | ||
95019c8c AS |
463 | static void result_free(struct dmatest_info *info, const char *name) |
464 | { | |
465 | struct dmatest_result *r, *_r; | |
466 | ||
467 | mutex_lock(&info->results_lock); | |
468 | list_for_each_entry_safe(r, _r, &info->results, node) { | |
469 | struct dmatest_thread_result *tr, *_tr; | |
470 | ||
471 | if (name && strcmp(r->name, name)) | |
472 | continue; | |
473 | ||
474 | list_for_each_entry_safe(tr, _tr, &r->results, node) { | |
d86b2f29 AS |
475 | if (tr->type == DMATEST_ET_VERIFY_BUF) |
476 | kfree(tr->vr); | |
95019c8c AS |
477 | list_del(&tr->node); |
478 | kfree(tr); | |
479 | } | |
480 | ||
481 | kfree(r->name); | |
482 | list_del(&r->node); | |
483 | kfree(r); | |
484 | } | |
485 | ||
486 | mutex_unlock(&info->results_lock); | |
487 | } | |
488 | ||
489 | static struct dmatest_result *result_init(struct dmatest_info *info, | |
490 | const char *name) | |
491 | { | |
492 | struct dmatest_result *r; | |
493 | ||
494 | r = kzalloc(sizeof(*r), GFP_KERNEL); | |
495 | if (r) { | |
496 | r->name = kstrdup(name, GFP_KERNEL); | |
497 | INIT_LIST_HEAD(&r->results); | |
498 | mutex_lock(&info->results_lock); | |
499 | list_add_tail(&r->node, &info->results); | |
500 | mutex_unlock(&info->results_lock); | |
501 | } | |
502 | return r; | |
503 | } | |
504 | ||
4a776f0a HS |
505 | /* |
506 | * This function repeatedly tests DMA transfers of various lengths and | |
b54d5cb9 DW |
507 | * offsets for a given operation type until it is told to exit by |
508 | * kthread_stop(). There may be multiple threads running this function | |
509 | * in parallel for a single channel, and there may be multiple channels | |
510 | * being tested in parallel. | |
4a776f0a HS |
511 | * |
512 | * Before each test, the source and destination buffer is initialized | |
513 | * with a known pattern. This pattern is different depending on | |
514 | * whether it's in an area which is supposed to be copied or | |
515 | * overwritten, and different in the source and destination buffers. | |
516 | * So if the DMA engine doesn't copy exactly what we tell it to copy, | |
517 | * we'll notice. | |
518 | */ | |
519 | static int dmatest_func(void *data) | |
520 | { | |
adfa543e | 521 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(done_wait); |
4a776f0a | 522 | struct dmatest_thread *thread = data; |
adfa543e | 523 | struct dmatest_done done = { .wait = &done_wait }; |
e03e93a9 | 524 | struct dmatest_info *info; |
15b8a8ea | 525 | struct dmatest_params *params; |
4a776f0a | 526 | struct dma_chan *chan; |
8be9e32b | 527 | struct dma_device *dev; |
4a776f0a HS |
528 | const char *thread_name; |
529 | unsigned int src_off, dst_off, len; | |
530 | unsigned int error_count; | |
531 | unsigned int failed_tests = 0; | |
532 | unsigned int total_tests = 0; | |
533 | dma_cookie_t cookie; | |
534 | enum dma_status status; | |
b54d5cb9 | 535 | enum dma_ctrl_flags flags; |
945b5af3 | 536 | u8 *pq_coefs = NULL; |
4a776f0a | 537 | int ret; |
b54d5cb9 DW |
538 | int src_cnt; |
539 | int dst_cnt; | |
540 | int i; | |
95019c8c | 541 | struct dmatest_result *result; |
4a776f0a HS |
542 | |
543 | thread_name = current->comm; | |
adfa543e | 544 | set_freezable(); |
4a776f0a HS |
545 | |
546 | ret = -ENOMEM; | |
4a776f0a HS |
547 | |
548 | smp_rmb(); | |
e03e93a9 | 549 | info = thread->info; |
15b8a8ea | 550 | params = &info->params; |
4a776f0a | 551 | chan = thread->chan; |
8be9e32b | 552 | dev = chan->device; |
b54d5cb9 DW |
553 | if (thread->type == DMA_MEMCPY) |
554 | src_cnt = dst_cnt = 1; | |
555 | else if (thread->type == DMA_XOR) { | |
8be9e32b | 556 | /* force odd to ensure dst = src */ |
15b8a8ea | 557 | src_cnt = min_odd(params->xor_sources | 1, dev->max_xor); |
b54d5cb9 | 558 | dst_cnt = 1; |
58691d64 | 559 | } else if (thread->type == DMA_PQ) { |
8be9e32b | 560 | /* force odd to ensure dst = src */ |
15b8a8ea | 561 | src_cnt = min_odd(params->pq_sources | 1, dma_maxpq(dev, 0)); |
58691d64 | 562 | dst_cnt = 2; |
945b5af3 | 563 | |
15b8a8ea | 564 | pq_coefs = kmalloc(params->pq_sources+1, GFP_KERNEL); |
945b5af3 AS |
565 | if (!pq_coefs) |
566 | goto err_thread_type; | |
567 | ||
94de648d | 568 | for (i = 0; i < src_cnt; i++) |
58691d64 | 569 | pq_coefs[i] = 1; |
b54d5cb9 | 570 | } else |
945b5af3 | 571 | goto err_thread_type; |
b54d5cb9 | 572 | |
95019c8c AS |
573 | result = result_init(info, thread_name); |
574 | if (!result) | |
575 | goto err_srcs; | |
576 | ||
b54d5cb9 DW |
577 | thread->srcs = kcalloc(src_cnt+1, sizeof(u8 *), GFP_KERNEL); |
578 | if (!thread->srcs) | |
579 | goto err_srcs; | |
580 | for (i = 0; i < src_cnt; i++) { | |
15b8a8ea | 581 | thread->srcs[i] = kmalloc(params->buf_size, GFP_KERNEL); |
b54d5cb9 DW |
582 | if (!thread->srcs[i]) |
583 | goto err_srcbuf; | |
584 | } | |
585 | thread->srcs[i] = NULL; | |
586 | ||
587 | thread->dsts = kcalloc(dst_cnt+1, sizeof(u8 *), GFP_KERNEL); | |
588 | if (!thread->dsts) | |
589 | goto err_dsts; | |
590 | for (i = 0; i < dst_cnt; i++) { | |
15b8a8ea | 591 | thread->dsts[i] = kmalloc(params->buf_size, GFP_KERNEL); |
b54d5cb9 DW |
592 | if (!thread->dsts[i]) |
593 | goto err_dstbuf; | |
594 | } | |
595 | thread->dsts[i] = NULL; | |
596 | ||
e44e0aa3 DW |
597 | set_user_nice(current, 10); |
598 | ||
b203bd3f | 599 | /* |
d1cab34c | 600 | * src and dst buffers are freed by ourselves below |
b203bd3f | 601 | */ |
0776ae7b | 602 | flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT; |
4a776f0a | 603 | |
0a2ff57d | 604 | while (!kthread_should_stop() |
15b8a8ea | 605 | && !(params->iterations && total_tests >= params->iterations)) { |
b54d5cb9 DW |
606 | struct dma_async_tx_descriptor *tx = NULL; |
607 | dma_addr_t dma_srcs[src_cnt]; | |
608 | dma_addr_t dma_dsts[dst_cnt]; | |
83544ae9 | 609 | u8 align = 0; |
d86be86e | 610 | |
4a776f0a HS |
611 | total_tests++; |
612 | ||
83544ae9 DW |
613 | /* honor alignment restrictions */ |
614 | if (thread->type == DMA_MEMCPY) | |
615 | align = dev->copy_align; | |
616 | else if (thread->type == DMA_XOR) | |
617 | align = dev->xor_align; | |
618 | else if (thread->type == DMA_PQ) | |
619 | align = dev->pq_align; | |
620 | ||
15b8a8ea | 621 | if (1 << align > params->buf_size) { |
cfe4f275 | 622 | pr_err("%u-byte buffer too small for %d-byte alignment\n", |
15b8a8ea | 623 | params->buf_size, 1 << align); |
cfe4f275 GL |
624 | break; |
625 | } | |
626 | ||
15b8a8ea | 627 | len = dmatest_random() % params->buf_size + 1; |
83544ae9 | 628 | len = (len >> align) << align; |
cfe4f275 GL |
629 | if (!len) |
630 | len = 1 << align; | |
15b8a8ea AS |
631 | src_off = dmatest_random() % (params->buf_size - len + 1); |
632 | dst_off = dmatest_random() % (params->buf_size - len + 1); | |
cfe4f275 | 633 | |
83544ae9 DW |
634 | src_off = (src_off >> align) << align; |
635 | dst_off = (dst_off >> align) << align; | |
636 | ||
15b8a8ea AS |
637 | dmatest_init_srcs(thread->srcs, src_off, len, params->buf_size); |
638 | dmatest_init_dsts(thread->dsts, dst_off, len, params->buf_size); | |
4a776f0a | 639 | |
b54d5cb9 DW |
640 | for (i = 0; i < src_cnt; i++) { |
641 | u8 *buf = thread->srcs[i] + src_off; | |
642 | ||
643 | dma_srcs[i] = dma_map_single(dev->dev, buf, len, | |
644 | DMA_TO_DEVICE); | |
afde3be1 AS |
645 | ret = dma_mapping_error(dev->dev, dma_srcs[i]); |
646 | if (ret) { | |
647 | unmap_src(dev->dev, dma_srcs, len, i); | |
95019c8c AS |
648 | thread_result_add(info, result, |
649 | DMATEST_ET_MAP_SRC, | |
650 | total_tests, src_off, dst_off, | |
651 | len, ret); | |
afde3be1 AS |
652 | failed_tests++; |
653 | continue; | |
654 | } | |
b54d5cb9 | 655 | } |
d86be86e | 656 | /* map with DMA_BIDIRECTIONAL to force writeback/invalidate */ |
b54d5cb9 DW |
657 | for (i = 0; i < dst_cnt; i++) { |
658 | dma_dsts[i] = dma_map_single(dev->dev, thread->dsts[i], | |
15b8a8ea | 659 | params->buf_size, |
b54d5cb9 | 660 | DMA_BIDIRECTIONAL); |
afde3be1 AS |
661 | ret = dma_mapping_error(dev->dev, dma_dsts[i]); |
662 | if (ret) { | |
663 | unmap_src(dev->dev, dma_srcs, len, src_cnt); | |
15b8a8ea AS |
664 | unmap_dst(dev->dev, dma_dsts, params->buf_size, |
665 | i); | |
95019c8c AS |
666 | thread_result_add(info, result, |
667 | DMATEST_ET_MAP_DST, | |
668 | total_tests, src_off, dst_off, | |
669 | len, ret); | |
afde3be1 AS |
670 | failed_tests++; |
671 | continue; | |
672 | } | |
b54d5cb9 DW |
673 | } |
674 | ||
675 | if (thread->type == DMA_MEMCPY) | |
676 | tx = dev->device_prep_dma_memcpy(chan, | |
677 | dma_dsts[0] + dst_off, | |
678 | dma_srcs[0], len, | |
679 | flags); | |
680 | else if (thread->type == DMA_XOR) | |
681 | tx = dev->device_prep_dma_xor(chan, | |
682 | dma_dsts[0] + dst_off, | |
67b9124f | 683 | dma_srcs, src_cnt, |
b54d5cb9 | 684 | len, flags); |
58691d64 DW |
685 | else if (thread->type == DMA_PQ) { |
686 | dma_addr_t dma_pq[dst_cnt]; | |
687 | ||
688 | for (i = 0; i < dst_cnt; i++) | |
689 | dma_pq[i] = dma_dsts[i] + dst_off; | |
690 | tx = dev->device_prep_dma_pq(chan, dma_pq, dma_srcs, | |
94de648d | 691 | src_cnt, pq_coefs, |
58691d64 DW |
692 | len, flags); |
693 | } | |
d86be86e | 694 | |
d86be86e | 695 | if (!tx) { |
632fd283 | 696 | unmap_src(dev->dev, dma_srcs, len, src_cnt); |
15b8a8ea AS |
697 | unmap_dst(dev->dev, dma_dsts, params->buf_size, |
698 | dst_cnt); | |
95019c8c AS |
699 | thread_result_add(info, result, DMATEST_ET_PREP, |
700 | total_tests, src_off, dst_off, | |
701 | len, 0); | |
d86be86e AN |
702 | msleep(100); |
703 | failed_tests++; | |
704 | continue; | |
705 | } | |
e44e0aa3 | 706 | |
adfa543e | 707 | done.done = false; |
e44e0aa3 | 708 | tx->callback = dmatest_callback; |
adfa543e | 709 | tx->callback_param = &done; |
d86be86e AN |
710 | cookie = tx->tx_submit(tx); |
711 | ||
4a776f0a | 712 | if (dma_submit_error(cookie)) { |
95019c8c AS |
713 | thread_result_add(info, result, DMATEST_ET_SUBMIT, |
714 | total_tests, src_off, dst_off, | |
715 | len, cookie); | |
4a776f0a HS |
716 | msleep(100); |
717 | failed_tests++; | |
718 | continue; | |
719 | } | |
b54d5cb9 | 720 | dma_async_issue_pending(chan); |
4a776f0a | 721 | |
bcc567e3 | 722 | wait_event_freezable_timeout(done_wait, done.done, |
15b8a8ea | 723 | msecs_to_jiffies(params->timeout)); |
981ed70d | 724 | |
e44e0aa3 | 725 | status = dma_async_is_tx_complete(chan, cookie, NULL, NULL); |
4a776f0a | 726 | |
adfa543e TH |
727 | if (!done.done) { |
728 | /* | |
729 | * We're leaving the timed out dma operation with | |
730 | * dangling pointer to done_wait. To make this | |
731 | * correct, we'll need to allocate wait_done for | |
732 | * each test iteration and perform "who's gonna | |
733 | * free it this time?" dancing. For now, just | |
734 | * leave it dangling. | |
735 | */ | |
95019c8c AS |
736 | thread_result_add(info, result, DMATEST_ET_TIMEOUT, |
737 | total_tests, src_off, dst_off, | |
738 | len, 0); | |
e44e0aa3 DW |
739 | failed_tests++; |
740 | continue; | |
741 | } else if (status != DMA_SUCCESS) { | |
95019c8c AS |
742 | enum dmatest_error_type type = (status == DMA_ERROR) ? |
743 | DMATEST_ET_DMA_ERROR : DMATEST_ET_DMA_IN_PROGRESS; | |
744 | thread_result_add(info, result, type, | |
745 | total_tests, src_off, dst_off, | |
746 | len, status); | |
4a776f0a HS |
747 | failed_tests++; |
748 | continue; | |
749 | } | |
e44e0aa3 | 750 | |
d1cab34c BZ |
751 | /* Unmap by myself */ |
752 | unmap_src(dev->dev, dma_srcs, len, src_cnt); | |
15b8a8ea | 753 | unmap_dst(dev->dev, dma_dsts, params->buf_size, dst_cnt); |
4a776f0a HS |
754 | |
755 | error_count = 0; | |
756 | ||
757 | pr_debug("%s: verifying source buffer...\n", thread_name); | |
d86b2f29 AS |
758 | error_count += verify_result_add(info, result, total_tests, |
759 | src_off, dst_off, len, thread->srcs, -1, | |
4a776f0a | 760 | 0, PATTERN_SRC, true); |
d86b2f29 AS |
761 | error_count += verify_result_add(info, result, total_tests, |
762 | src_off, dst_off, len, thread->srcs, 0, | |
763 | src_off, PATTERN_SRC | PATTERN_COPY, true); | |
764 | error_count += verify_result_add(info, result, total_tests, | |
765 | src_off, dst_off, len, thread->srcs, 1, | |
766 | src_off + len, PATTERN_SRC, true); | |
767 | ||
768 | pr_debug("%s: verifying dest buffer...\n", thread_name); | |
769 | error_count += verify_result_add(info, result, total_tests, | |
770 | src_off, dst_off, len, thread->dsts, -1, | |
4a776f0a | 771 | 0, PATTERN_DST, false); |
d86b2f29 AS |
772 | error_count += verify_result_add(info, result, total_tests, |
773 | src_off, dst_off, len, thread->dsts, 0, | |
774 | src_off, PATTERN_SRC | PATTERN_COPY, false); | |
775 | error_count += verify_result_add(info, result, total_tests, | |
776 | src_off, dst_off, len, thread->dsts, 1, | |
777 | dst_off + len, PATTERN_DST, false); | |
4a776f0a HS |
778 | |
779 | if (error_count) { | |
95019c8c AS |
780 | thread_result_add(info, result, DMATEST_ET_VERIFY, |
781 | total_tests, src_off, dst_off, | |
782 | len, error_count); | |
4a776f0a HS |
783 | failed_tests++; |
784 | } else { | |
95019c8c AS |
785 | thread_result_add(info, result, DMATEST_ET_OK, |
786 | total_tests, src_off, dst_off, | |
787 | len, 0); | |
4a776f0a HS |
788 | } |
789 | } | |
790 | ||
791 | ret = 0; | |
b54d5cb9 DW |
792 | for (i = 0; thread->dsts[i]; i++) |
793 | kfree(thread->dsts[i]); | |
4a776f0a | 794 | err_dstbuf: |
b54d5cb9 DW |
795 | kfree(thread->dsts); |
796 | err_dsts: | |
797 | for (i = 0; thread->srcs[i]; i++) | |
798 | kfree(thread->srcs[i]); | |
4a776f0a | 799 | err_srcbuf: |
b54d5cb9 DW |
800 | kfree(thread->srcs); |
801 | err_srcs: | |
945b5af3 AS |
802 | kfree(pq_coefs); |
803 | err_thread_type: | |
4a776f0a HS |
804 | pr_notice("%s: terminating after %u tests, %u failures (status %d)\n", |
805 | thread_name, total_tests, failed_tests, ret); | |
0a2ff57d | 806 | |
9704efaa | 807 | /* terminate all transfers on specified channels */ |
5e034f7b SH |
808 | if (ret) |
809 | dmaengine_terminate_all(chan); | |
810 | ||
3e5ccd86 AS |
811 | thread->done = true; |
812 | ||
15b8a8ea | 813 | if (params->iterations > 0) |
0a2ff57d | 814 | while (!kthread_should_stop()) { |
b953df7c | 815 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wait_dmatest_exit); |
0a2ff57d NF |
816 | interruptible_sleep_on(&wait_dmatest_exit); |
817 | } | |
818 | ||
4a776f0a HS |
819 | return ret; |
820 | } | |
821 | ||
822 | static void dmatest_cleanup_channel(struct dmatest_chan *dtc) | |
823 | { | |
824 | struct dmatest_thread *thread; | |
825 | struct dmatest_thread *_thread; | |
826 | int ret; | |
827 | ||
828 | list_for_each_entry_safe(thread, _thread, &dtc->threads, node) { | |
829 | ret = kthread_stop(thread->task); | |
830 | pr_debug("dmatest: thread %s exited with status %d\n", | |
831 | thread->task->comm, ret); | |
832 | list_del(&thread->node); | |
833 | kfree(thread); | |
834 | } | |
9704efaa VK |
835 | |
836 | /* terminate all transfers on specified channels */ | |
944ea4dd | 837 | dmaengine_terminate_all(dtc->chan); |
9704efaa | 838 | |
4a776f0a HS |
839 | kfree(dtc); |
840 | } | |
841 | ||
e03e93a9 AS |
842 | static int dmatest_add_threads(struct dmatest_info *info, |
843 | struct dmatest_chan *dtc, enum dma_transaction_type type) | |
4a776f0a | 844 | { |
15b8a8ea | 845 | struct dmatest_params *params = &info->params; |
b54d5cb9 DW |
846 | struct dmatest_thread *thread; |
847 | struct dma_chan *chan = dtc->chan; | |
848 | char *op; | |
849 | unsigned int i; | |
4a776f0a | 850 | |
b54d5cb9 DW |
851 | if (type == DMA_MEMCPY) |
852 | op = "copy"; | |
853 | else if (type == DMA_XOR) | |
854 | op = "xor"; | |
58691d64 DW |
855 | else if (type == DMA_PQ) |
856 | op = "pq"; | |
b54d5cb9 DW |
857 | else |
858 | return -EINVAL; | |
4a776f0a | 859 | |
15b8a8ea | 860 | for (i = 0; i < params->threads_per_chan; i++) { |
4a776f0a HS |
861 | thread = kzalloc(sizeof(struct dmatest_thread), GFP_KERNEL); |
862 | if (!thread) { | |
b54d5cb9 DW |
863 | pr_warning("dmatest: No memory for %s-%s%u\n", |
864 | dma_chan_name(chan), op, i); | |
865 | ||
4a776f0a HS |
866 | break; |
867 | } | |
e03e93a9 | 868 | thread->info = info; |
4a776f0a | 869 | thread->chan = dtc->chan; |
b54d5cb9 | 870 | thread->type = type; |
4a776f0a | 871 | smp_wmb(); |
b54d5cb9 DW |
872 | thread->task = kthread_run(dmatest_func, thread, "%s-%s%u", |
873 | dma_chan_name(chan), op, i); | |
4a776f0a | 874 | if (IS_ERR(thread->task)) { |
b54d5cb9 DW |
875 | pr_warning("dmatest: Failed to run thread %s-%s%u\n", |
876 | dma_chan_name(chan), op, i); | |
4a776f0a HS |
877 | kfree(thread); |
878 | break; | |
879 | } | |
880 | ||
881 | /* srcbuf and dstbuf are allocated by the thread itself */ | |
882 | ||
883 | list_add_tail(&thread->node, &dtc->threads); | |
884 | } | |
885 | ||
b54d5cb9 DW |
886 | return i; |
887 | } | |
888 | ||
e03e93a9 AS |
889 | static int dmatest_add_channel(struct dmatest_info *info, |
890 | struct dma_chan *chan) | |
b54d5cb9 DW |
891 | { |
892 | struct dmatest_chan *dtc; | |
893 | struct dma_device *dma_dev = chan->device; | |
894 | unsigned int thread_count = 0; | |
b9033e68 | 895 | int cnt; |
b54d5cb9 DW |
896 | |
897 | dtc = kmalloc(sizeof(struct dmatest_chan), GFP_KERNEL); | |
898 | if (!dtc) { | |
899 | pr_warning("dmatest: No memory for %s\n", dma_chan_name(chan)); | |
900 | return -ENOMEM; | |
901 | } | |
902 | ||
903 | dtc->chan = chan; | |
904 | INIT_LIST_HEAD(&dtc->threads); | |
905 | ||
906 | if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) { | |
e03e93a9 | 907 | cnt = dmatest_add_threads(info, dtc, DMA_MEMCPY); |
f1aef8b6 | 908 | thread_count += cnt > 0 ? cnt : 0; |
b54d5cb9 DW |
909 | } |
910 | if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) { | |
e03e93a9 | 911 | cnt = dmatest_add_threads(info, dtc, DMA_XOR); |
f1aef8b6 | 912 | thread_count += cnt > 0 ? cnt : 0; |
b54d5cb9 | 913 | } |
58691d64 | 914 | if (dma_has_cap(DMA_PQ, dma_dev->cap_mask)) { |
e03e93a9 | 915 | cnt = dmatest_add_threads(info, dtc, DMA_PQ); |
d07a74a5 | 916 | thread_count += cnt > 0 ? cnt : 0; |
58691d64 | 917 | } |
b54d5cb9 DW |
918 | |
919 | pr_info("dmatest: Started %u threads using %s\n", | |
920 | thread_count, dma_chan_name(chan)); | |
4a776f0a | 921 | |
838cc704 AS |
922 | list_add_tail(&dtc->node, &info->channels); |
923 | info->nr_channels++; | |
4a776f0a | 924 | |
33df8ca0 | 925 | return 0; |
4a776f0a HS |
926 | } |
927 | ||
7dd60251 | 928 | static bool filter(struct dma_chan *chan, void *param) |
4a776f0a | 929 | { |
15b8a8ea | 930 | struct dmatest_params *params = param; |
e03e93a9 | 931 | |
15b8a8ea AS |
932 | if (!dmatest_match_channel(params, chan) || |
933 | !dmatest_match_device(params, chan->device)) | |
7dd60251 | 934 | return false; |
33df8ca0 | 935 | else |
7dd60251 | 936 | return true; |
4a776f0a HS |
937 | } |
938 | ||
851b7e16 | 939 | static int __run_threaded_test(struct dmatest_info *info) |
4a776f0a | 940 | { |
33df8ca0 DW |
941 | dma_cap_mask_t mask; |
942 | struct dma_chan *chan; | |
15b8a8ea | 943 | struct dmatest_params *params = &info->params; |
33df8ca0 DW |
944 | int err = 0; |
945 | ||
946 | dma_cap_zero(mask); | |
947 | dma_cap_set(DMA_MEMCPY, mask); | |
948 | for (;;) { | |
15b8a8ea | 949 | chan = dma_request_channel(mask, filter, params); |
33df8ca0 | 950 | if (chan) { |
e03e93a9 | 951 | err = dmatest_add_channel(info, chan); |
c56c81ab | 952 | if (err) { |
33df8ca0 DW |
953 | dma_release_channel(chan); |
954 | break; /* add_channel failed, punt */ | |
955 | } | |
956 | } else | |
957 | break; /* no more channels available */ | |
15b8a8ea AS |
958 | if (params->max_channels && |
959 | info->nr_channels >= params->max_channels) | |
33df8ca0 DW |
960 | break; /* we have all we need */ |
961 | } | |
33df8ca0 | 962 | return err; |
4a776f0a | 963 | } |
4a776f0a | 964 | |
851b7e16 AS |
965 | #ifndef MODULE |
966 | static int run_threaded_test(struct dmatest_info *info) | |
967 | { | |
968 | int ret; | |
969 | ||
970 | mutex_lock(&info->lock); | |
971 | ret = __run_threaded_test(info); | |
972 | mutex_unlock(&info->lock); | |
973 | return ret; | |
974 | } | |
975 | #endif | |
976 | ||
977 | static void __stop_threaded_test(struct dmatest_info *info) | |
4a776f0a | 978 | { |
33df8ca0 | 979 | struct dmatest_chan *dtc, *_dtc; |
7cbd4877 | 980 | struct dma_chan *chan; |
33df8ca0 | 981 | |
838cc704 | 982 | list_for_each_entry_safe(dtc, _dtc, &info->channels, node) { |
33df8ca0 | 983 | list_del(&dtc->node); |
7cbd4877 | 984 | chan = dtc->chan; |
33df8ca0 | 985 | dmatest_cleanup_channel(dtc); |
838cc704 | 986 | pr_debug("dmatest: dropped channel %s\n", dma_chan_name(chan)); |
7cbd4877 | 987 | dma_release_channel(chan); |
33df8ca0 | 988 | } |
838cc704 AS |
989 | |
990 | info->nr_channels = 0; | |
4a776f0a | 991 | } |
e03e93a9 | 992 | |
851b7e16 AS |
993 | static void stop_threaded_test(struct dmatest_info *info) |
994 | { | |
995 | mutex_lock(&info->lock); | |
996 | __stop_threaded_test(info); | |
997 | mutex_unlock(&info->lock); | |
998 | } | |
999 | ||
1000 | static int __restart_threaded_test(struct dmatest_info *info, bool run) | |
1001 | { | |
1002 | struct dmatest_params *params = &info->params; | |
851b7e16 AS |
1003 | |
1004 | /* Stop any running test first */ | |
1005 | __stop_threaded_test(info); | |
1006 | ||
1007 | if (run == false) | |
1008 | return 0; | |
1009 | ||
95019c8c AS |
1010 | /* Clear results from previous run */ |
1011 | result_free(info, NULL); | |
1012 | ||
851b7e16 | 1013 | /* Copy test parameters */ |
a6c268d0 AS |
1014 | params->buf_size = test_buf_size; |
1015 | strlcpy(params->channel, strim(test_channel), sizeof(params->channel)); | |
1016 | strlcpy(params->device, strim(test_device), sizeof(params->device)); | |
1017 | params->threads_per_chan = threads_per_chan; | |
1018 | params->max_channels = max_channels; | |
1019 | params->iterations = iterations; | |
1020 | params->xor_sources = xor_sources; | |
1021 | params->pq_sources = pq_sources; | |
1022 | params->timeout = timeout; | |
851b7e16 AS |
1023 | |
1024 | /* Run test with new parameters */ | |
bcc567e3 AS |
1025 | return __run_threaded_test(info); |
1026 | } | |
1027 | ||
1028 | static bool __is_threaded_test_run(struct dmatest_info *info) | |
1029 | { | |
1030 | struct dmatest_chan *dtc; | |
1031 | ||
1032 | list_for_each_entry(dtc, &info->channels, node) { | |
1033 | struct dmatest_thread *thread; | |
1034 | ||
1035 | list_for_each_entry(thread, &dtc->threads, node) { | |
1036 | if (!thread->done) | |
1037 | return true; | |
1038 | } | |
851b7e16 AS |
1039 | } |
1040 | ||
bcc567e3 | 1041 | return false; |
851b7e16 AS |
1042 | } |
1043 | ||
851b7e16 AS |
1044 | static ssize_t dtf_read_run(struct file *file, char __user *user_buf, |
1045 | size_t count, loff_t *ppos) | |
1046 | { | |
1047 | struct dmatest_info *info = file->private_data; | |
1048 | char buf[3]; | |
1049 | ||
1050 | mutex_lock(&info->lock); | |
3e5ccd86 | 1051 | |
bcc567e3 | 1052 | if (__is_threaded_test_run(info)) { |
851b7e16 | 1053 | buf[0] = 'Y'; |
3e5ccd86 AS |
1054 | } else { |
1055 | __stop_threaded_test(info); | |
851b7e16 | 1056 | buf[0] = 'N'; |
3e5ccd86 AS |
1057 | } |
1058 | ||
851b7e16 AS |
1059 | mutex_unlock(&info->lock); |
1060 | buf[1] = '\n'; | |
1061 | buf[2] = 0x00; | |
1062 | return simple_read_from_buffer(user_buf, count, ppos, buf, 2); | |
1063 | } | |
1064 | ||
1065 | static ssize_t dtf_write_run(struct file *file, const char __user *user_buf, | |
1066 | size_t count, loff_t *ppos) | |
1067 | { | |
1068 | struct dmatest_info *info = file->private_data; | |
1069 | char buf[16]; | |
1070 | bool bv; | |
1071 | int ret = 0; | |
1072 | ||
1073 | if (copy_from_user(buf, user_buf, min(count, (sizeof(buf) - 1)))) | |
1074 | return -EFAULT; | |
1075 | ||
1076 | if (strtobool(buf, &bv) == 0) { | |
1077 | mutex_lock(&info->lock); | |
bcc567e3 AS |
1078 | |
1079 | if (__is_threaded_test_run(info)) | |
1080 | ret = -EBUSY; | |
1081 | else | |
1082 | ret = __restart_threaded_test(info, bv); | |
1083 | ||
851b7e16 AS |
1084 | mutex_unlock(&info->lock); |
1085 | } | |
1086 | ||
1087 | return ret ? ret : count; | |
1088 | } | |
1089 | ||
1090 | static const struct file_operations dtf_run_fops = { | |
1091 | .read = dtf_read_run, | |
1092 | .write = dtf_write_run, | |
1093 | .open = simple_open, | |
1094 | .llseek = default_llseek, | |
1095 | }; | |
1096 | ||
95019c8c AS |
1097 | static int dtf_results_show(struct seq_file *sf, void *data) |
1098 | { | |
1099 | struct dmatest_info *info = sf->private; | |
1100 | struct dmatest_result *result; | |
1101 | struct dmatest_thread_result *tr; | |
d86b2f29 | 1102 | unsigned int i; |
95019c8c AS |
1103 | |
1104 | mutex_lock(&info->results_lock); | |
1105 | list_for_each_entry(result, &info->results, node) { | |
d86b2f29 | 1106 | list_for_each_entry(tr, &result->results, node) { |
95019c8c AS |
1107 | seq_printf(sf, "%s\n", |
1108 | thread_result_get(result->name, tr)); | |
d86b2f29 AS |
1109 | if (tr->type == DMATEST_ET_VERIFY_BUF) { |
1110 | for (i = 0; i < tr->vr->error_count; i++) { | |
1111 | seq_printf(sf, "\t%s\n", | |
1112 | verify_result_get_one(tr->vr, i)); | |
1113 | } | |
1114 | } | |
1115 | } | |
95019c8c AS |
1116 | } |
1117 | ||
1118 | mutex_unlock(&info->results_lock); | |
1119 | return 0; | |
1120 | } | |
1121 | ||
1122 | static int dtf_results_open(struct inode *inode, struct file *file) | |
1123 | { | |
1124 | return single_open(file, dtf_results_show, inode->i_private); | |
1125 | } | |
1126 | ||
1127 | static const struct file_operations dtf_results_fops = { | |
1128 | .open = dtf_results_open, | |
1129 | .read = seq_read, | |
1130 | .llseek = seq_lseek, | |
1131 | .release = single_release, | |
1132 | }; | |
1133 | ||
851b7e16 AS |
1134 | static int dmatest_register_dbgfs(struct dmatest_info *info) |
1135 | { | |
1136 | struct dentry *d; | |
851b7e16 AS |
1137 | |
1138 | d = debugfs_create_dir("dmatest", NULL); | |
1139 | if (IS_ERR(d)) | |
1140 | return PTR_ERR(d); | |
1141 | if (!d) | |
1142 | goto err_root; | |
1143 | ||
1144 | info->root = d; | |
1145 | ||
851b7e16 | 1146 | /* Run or stop threaded test */ |
e24775e4 AS |
1147 | debugfs_create_file("run", S_IWUSR | S_IRUGO, info->root, info, |
1148 | &dtf_run_fops); | |
851b7e16 | 1149 | |
95019c8c | 1150 | /* Results of test in progress */ |
e24775e4 AS |
1151 | debugfs_create_file("results", S_IRUGO, info->root, info, |
1152 | &dtf_results_fops); | |
95019c8c | 1153 | |
851b7e16 AS |
1154 | return 0; |
1155 | ||
851b7e16 AS |
1156 | err_root: |
1157 | pr_err("dmatest: Failed to initialize debugfs\n"); | |
e24775e4 | 1158 | return -ENOMEM; |
851b7e16 AS |
1159 | } |
1160 | ||
e03e93a9 AS |
1161 | static int __init dmatest_init(void) |
1162 | { | |
1163 | struct dmatest_info *info = &test_info; | |
851b7e16 | 1164 | int ret; |
e03e93a9 AS |
1165 | |
1166 | memset(info, 0, sizeof(*info)); | |
1167 | ||
851b7e16 | 1168 | mutex_init(&info->lock); |
838cc704 AS |
1169 | INIT_LIST_HEAD(&info->channels); |
1170 | ||
95019c8c AS |
1171 | mutex_init(&info->results_lock); |
1172 | INIT_LIST_HEAD(&info->results); | |
1173 | ||
851b7e16 AS |
1174 | ret = dmatest_register_dbgfs(info); |
1175 | if (ret) | |
1176 | return ret; | |
1177 | ||
1178 | #ifdef MODULE | |
1179 | return 0; | |
1180 | #else | |
e03e93a9 | 1181 | return run_threaded_test(info); |
851b7e16 | 1182 | #endif |
e03e93a9 AS |
1183 | } |
1184 | /* when compiled-in wait for drivers to load first */ | |
1185 | late_initcall(dmatest_init); | |
1186 | ||
1187 | static void __exit dmatest_exit(void) | |
1188 | { | |
1189 | struct dmatest_info *info = &test_info; | |
1190 | ||
851b7e16 | 1191 | debugfs_remove_recursive(info->root); |
e03e93a9 | 1192 | stop_threaded_test(info); |
95019c8c | 1193 | result_free(info, NULL); |
e03e93a9 | 1194 | } |
4a776f0a HS |
1195 | module_exit(dmatest_exit); |
1196 | ||
e05503ef | 1197 | MODULE_AUTHOR("Haavard Skinnemoen (Atmel)"); |
4a776f0a | 1198 | MODULE_LICENSE("GPL v2"); |