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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; | |
28 | module_param(test_buf_size, uint, S_IRUGO); | |
29 | MODULE_PARM_DESC(test_buf_size, "Size of the memcpy test buffer"); | |
30 | ||
06190d84 | 31 | static char test_channel[20]; |
4a776f0a HS |
32 | module_param_string(channel, test_channel, sizeof(test_channel), S_IRUGO); |
33 | MODULE_PARM_DESC(channel, "Bus ID of the channel to test (default: any)"); | |
34 | ||
06190d84 | 35 | static char test_device[20]; |
4a776f0a HS |
36 | module_param_string(device, test_device, sizeof(test_device), S_IRUGO); |
37 | MODULE_PARM_DESC(device, "Bus ID of the DMA Engine to test (default: any)"); | |
38 | ||
39 | static unsigned int threads_per_chan = 1; | |
40 | module_param(threads_per_chan, uint, S_IRUGO); | |
41 | MODULE_PARM_DESC(threads_per_chan, | |
42 | "Number of threads to start per channel (default: 1)"); | |
43 | ||
44 | static unsigned int max_channels; | |
45 | module_param(max_channels, uint, S_IRUGO); | |
33df8ca0 | 46 | MODULE_PARM_DESC(max_channels, |
4a776f0a HS |
47 | "Maximum number of channels to use (default: all)"); |
48 | ||
0a2ff57d NF |
49 | static unsigned int iterations; |
50 | module_param(iterations, uint, S_IRUGO); | |
51 | MODULE_PARM_DESC(iterations, | |
52 | "Iterations before stopping test (default: infinite)"); | |
53 | ||
b54d5cb9 DW |
54 | static unsigned int xor_sources = 3; |
55 | module_param(xor_sources, uint, S_IRUGO); | |
56 | MODULE_PARM_DESC(xor_sources, | |
57 | "Number of xor source buffers (default: 3)"); | |
58 | ||
58691d64 DW |
59 | static unsigned int pq_sources = 3; |
60 | module_param(pq_sources, uint, S_IRUGO); | |
61 | MODULE_PARM_DESC(pq_sources, | |
62 | "Number of p+q source buffers (default: 3)"); | |
63 | ||
d42efe6b VK |
64 | static int timeout = 3000; |
65 | module_param(timeout, uint, S_IRUGO); | |
85ee7a1d JP |
66 | MODULE_PARM_DESC(timeout, "Transfer Timeout in msec (default: 3000), " |
67 | "Pass -1 for infinite timeout"); | |
d42efe6b | 68 | |
74b5c07a AS |
69 | /* Maximum amount of mismatched bytes in buffer to print */ |
70 | #define MAX_ERROR_COUNT 32 | |
71 | ||
4a776f0a HS |
72 | /* |
73 | * Initialization patterns. All bytes in the source buffer has bit 7 | |
74 | * set, all bytes in the destination buffer has bit 7 cleared. | |
75 | * | |
76 | * Bit 6 is set for all bytes which are to be copied by the DMA | |
77 | * engine. Bit 5 is set for all bytes which are to be overwritten by | |
78 | * the DMA engine. | |
79 | * | |
80 | * The remaining bits are the inverse of a counter which increments by | |
81 | * one for each byte address. | |
82 | */ | |
83 | #define PATTERN_SRC 0x80 | |
84 | #define PATTERN_DST 0x00 | |
85 | #define PATTERN_COPY 0x40 | |
86 | #define PATTERN_OVERWRITE 0x20 | |
87 | #define PATTERN_COUNT_MASK 0x1f | |
88 | ||
95019c8c AS |
89 | enum dmatest_error_type { |
90 | DMATEST_ET_OK, | |
91 | DMATEST_ET_MAP_SRC, | |
92 | DMATEST_ET_MAP_DST, | |
93 | DMATEST_ET_PREP, | |
94 | DMATEST_ET_SUBMIT, | |
95 | DMATEST_ET_TIMEOUT, | |
96 | DMATEST_ET_DMA_ERROR, | |
97 | DMATEST_ET_DMA_IN_PROGRESS, | |
98 | DMATEST_ET_VERIFY, | |
d86b2f29 AS |
99 | DMATEST_ET_VERIFY_BUF, |
100 | }; | |
101 | ||
102 | struct dmatest_verify_buffer { | |
103 | unsigned int index; | |
104 | u8 expected; | |
105 | u8 actual; | |
106 | }; | |
107 | ||
108 | struct dmatest_verify_result { | |
109 | unsigned int error_count; | |
110 | struct dmatest_verify_buffer data[MAX_ERROR_COUNT]; | |
111 | u8 pattern; | |
112 | bool is_srcbuf; | |
95019c8c AS |
113 | }; |
114 | ||
115 | struct dmatest_thread_result { | |
116 | struct list_head node; | |
117 | unsigned int n; | |
118 | unsigned int src_off; | |
119 | unsigned int dst_off; | |
120 | unsigned int len; | |
121 | enum dmatest_error_type type; | |
122 | union { | |
d86b2f29 AS |
123 | unsigned long data; |
124 | dma_cookie_t cookie; | |
125 | enum dma_status status; | |
126 | int error; | |
127 | struct dmatest_verify_result *vr; | |
95019c8c AS |
128 | }; |
129 | }; | |
130 | ||
131 | struct dmatest_result { | |
132 | struct list_head node; | |
133 | char *name; | |
134 | struct list_head results; | |
135 | }; | |
136 | ||
e03e93a9 AS |
137 | struct dmatest_info; |
138 | ||
4a776f0a HS |
139 | struct dmatest_thread { |
140 | struct list_head node; | |
e03e93a9 | 141 | struct dmatest_info *info; |
4a776f0a HS |
142 | struct task_struct *task; |
143 | struct dma_chan *chan; | |
b54d5cb9 DW |
144 | u8 **srcs; |
145 | u8 **dsts; | |
146 | enum dma_transaction_type type; | |
3e5ccd86 | 147 | bool done; |
4a776f0a HS |
148 | }; |
149 | ||
150 | struct dmatest_chan { | |
151 | struct list_head node; | |
152 | struct dma_chan *chan; | |
153 | struct list_head threads; | |
154 | }; | |
155 | ||
e03e93a9 | 156 | /** |
15b8a8ea | 157 | * struct dmatest_params - test parameters. |
e03e93a9 AS |
158 | * @buf_size: size of the memcpy test buffer |
159 | * @channel: bus ID of the channel to test | |
160 | * @device: bus ID of the DMA Engine to test | |
161 | * @threads_per_chan: number of threads to start per channel | |
162 | * @max_channels: maximum number of channels to use | |
163 | * @iterations: iterations before stopping test | |
164 | * @xor_sources: number of xor source buffers | |
165 | * @pq_sources: number of p+q source buffers | |
166 | * @timeout: transfer timeout in msec, -1 for infinite timeout | |
167 | */ | |
15b8a8ea | 168 | struct dmatest_params { |
e03e93a9 AS |
169 | unsigned int buf_size; |
170 | char channel[20]; | |
171 | char device[20]; | |
172 | unsigned int threads_per_chan; | |
173 | unsigned int max_channels; | |
174 | unsigned int iterations; | |
175 | unsigned int xor_sources; | |
176 | unsigned int pq_sources; | |
177 | int timeout; | |
15b8a8ea AS |
178 | }; |
179 | ||
180 | /** | |
181 | * struct dmatest_info - test information. | |
182 | * @params: test parameters | |
851b7e16 | 183 | * @lock: access protection to the fields of this structure |
15b8a8ea AS |
184 | */ |
185 | struct dmatest_info { | |
186 | /* Test parameters */ | |
187 | struct dmatest_params params; | |
838cc704 AS |
188 | |
189 | /* Internal state */ | |
190 | struct list_head channels; | |
191 | unsigned int nr_channels; | |
851b7e16 AS |
192 | struct mutex lock; |
193 | ||
194 | /* debugfs related stuff */ | |
195 | struct dentry *root; | |
196 | struct dmatest_params dbgfs_params; | |
95019c8c AS |
197 | |
198 | /* Test results */ | |
199 | struct list_head results; | |
200 | struct mutex results_lock; | |
e03e93a9 AS |
201 | }; |
202 | ||
203 | static struct dmatest_info test_info; | |
204 | ||
15b8a8ea | 205 | static bool dmatest_match_channel(struct dmatest_params *params, |
e03e93a9 | 206 | struct dma_chan *chan) |
4a776f0a | 207 | { |
15b8a8ea | 208 | if (params->channel[0] == '\0') |
4a776f0a | 209 | return true; |
15b8a8ea | 210 | return strcmp(dma_chan_name(chan), params->channel) == 0; |
4a776f0a HS |
211 | } |
212 | ||
15b8a8ea | 213 | static bool dmatest_match_device(struct dmatest_params *params, |
e03e93a9 | 214 | struct dma_device *device) |
4a776f0a | 215 | { |
15b8a8ea | 216 | if (params->device[0] == '\0') |
4a776f0a | 217 | return true; |
15b8a8ea | 218 | return strcmp(dev_name(device->dev), params->device) == 0; |
4a776f0a HS |
219 | } |
220 | ||
221 | static unsigned long dmatest_random(void) | |
222 | { | |
223 | unsigned long buf; | |
224 | ||
225 | get_random_bytes(&buf, sizeof(buf)); | |
226 | return buf; | |
227 | } | |
228 | ||
e03e93a9 AS |
229 | static void dmatest_init_srcs(u8 **bufs, unsigned int start, unsigned int len, |
230 | unsigned int buf_size) | |
4a776f0a HS |
231 | { |
232 | unsigned int i; | |
b54d5cb9 DW |
233 | u8 *buf; |
234 | ||
235 | for (; (buf = *bufs); bufs++) { | |
236 | for (i = 0; i < start; i++) | |
237 | buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK); | |
238 | for ( ; i < start + len; i++) | |
239 | buf[i] = PATTERN_SRC | PATTERN_COPY | |
c019894e | 240 | | (~i & PATTERN_COUNT_MASK); |
e03e93a9 | 241 | for ( ; i < buf_size; i++) |
b54d5cb9 DW |
242 | buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK); |
243 | buf++; | |
244 | } | |
4a776f0a HS |
245 | } |
246 | ||
e03e93a9 AS |
247 | static void dmatest_init_dsts(u8 **bufs, unsigned int start, unsigned int len, |
248 | unsigned int buf_size) | |
4a776f0a HS |
249 | { |
250 | unsigned int i; | |
b54d5cb9 DW |
251 | u8 *buf; |
252 | ||
253 | for (; (buf = *bufs); bufs++) { | |
254 | for (i = 0; i < start; i++) | |
255 | buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK); | |
256 | for ( ; i < start + len; i++) | |
257 | buf[i] = PATTERN_DST | PATTERN_OVERWRITE | |
258 | | (~i & PATTERN_COUNT_MASK); | |
e03e93a9 | 259 | for ( ; i < buf_size; i++) |
b54d5cb9 DW |
260 | buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK); |
261 | } | |
4a776f0a HS |
262 | } |
263 | ||
d86b2f29 AS |
264 | static unsigned int dmatest_verify(struct dmatest_verify_result *vr, u8 **bufs, |
265 | unsigned int start, unsigned int end, unsigned int counter, | |
266 | u8 pattern, bool is_srcbuf) | |
4a776f0a HS |
267 | { |
268 | unsigned int i; | |
269 | unsigned int error_count = 0; | |
270 | u8 actual; | |
b54d5cb9 DW |
271 | u8 expected; |
272 | u8 *buf; | |
273 | unsigned int counter_orig = counter; | |
d86b2f29 | 274 | struct dmatest_verify_buffer *vb; |
b54d5cb9 DW |
275 | |
276 | for (; (buf = *bufs); bufs++) { | |
277 | counter = counter_orig; | |
278 | for (i = start; i < end; i++) { | |
279 | actual = buf[i]; | |
280 | expected = pattern | (~counter & PATTERN_COUNT_MASK); | |
281 | if (actual != expected) { | |
d86b2f29 AS |
282 | if (error_count < MAX_ERROR_COUNT && vr) { |
283 | vb = &vr->data[error_count]; | |
284 | vb->index = i; | |
285 | vb->expected = expected; | |
286 | vb->actual = actual; | |
287 | } | |
b54d5cb9 DW |
288 | error_count++; |
289 | } | |
290 | counter++; | |
4a776f0a | 291 | } |
4a776f0a HS |
292 | } |
293 | ||
74b5c07a | 294 | if (error_count > MAX_ERROR_COUNT) |
4a776f0a | 295 | pr_warning("%s: %u errors suppressed\n", |
74b5c07a | 296 | current->comm, error_count - MAX_ERROR_COUNT); |
4a776f0a HS |
297 | |
298 | return error_count; | |
299 | } | |
300 | ||
adfa543e TH |
301 | /* poor man's completion - we want to use wait_event_freezable() on it */ |
302 | struct dmatest_done { | |
303 | bool done; | |
304 | wait_queue_head_t *wait; | |
305 | }; | |
306 | ||
307 | static void dmatest_callback(void *arg) | |
e44e0aa3 | 308 | { |
adfa543e TH |
309 | struct dmatest_done *done = arg; |
310 | ||
311 | done->done = true; | |
312 | wake_up_all(done->wait); | |
e44e0aa3 DW |
313 | } |
314 | ||
632fd283 AS |
315 | static inline void unmap_src(struct device *dev, dma_addr_t *addr, size_t len, |
316 | unsigned int count) | |
317 | { | |
318 | while (count--) | |
319 | dma_unmap_single(dev, addr[count], len, DMA_TO_DEVICE); | |
320 | } | |
321 | ||
322 | static inline void unmap_dst(struct device *dev, dma_addr_t *addr, size_t len, | |
323 | unsigned int count) | |
324 | { | |
325 | while (count--) | |
326 | dma_unmap_single(dev, addr[count], len, DMA_BIDIRECTIONAL); | |
327 | } | |
328 | ||
8be9e32b AM |
329 | static unsigned int min_odd(unsigned int x, unsigned int y) |
330 | { | |
331 | unsigned int val = min(x, y); | |
332 | ||
333 | return val % 2 ? val : val - 1; | |
334 | } | |
335 | ||
d86b2f29 AS |
336 | static char *verify_result_get_one(struct dmatest_verify_result *vr, |
337 | unsigned int i) | |
338 | { | |
339 | struct dmatest_verify_buffer *vb = &vr->data[i]; | |
340 | u8 diff = vb->actual ^ vr->pattern; | |
341 | static char buf[512]; | |
342 | char *msg; | |
343 | ||
344 | if (vr->is_srcbuf) | |
345 | msg = "srcbuf overwritten!"; | |
346 | else if ((vr->pattern & PATTERN_COPY) | |
347 | && (diff & (PATTERN_COPY | PATTERN_OVERWRITE))) | |
348 | msg = "dstbuf not copied!"; | |
349 | else if (diff & PATTERN_SRC) | |
350 | msg = "dstbuf was copied!"; | |
351 | else | |
352 | msg = "dstbuf mismatch!"; | |
353 | ||
354 | snprintf(buf, sizeof(buf) - 1, "%s [0x%x] Expected %02x, got %02x", msg, | |
355 | vb->index, vb->expected, vb->actual); | |
356 | ||
357 | return buf; | |
358 | } | |
359 | ||
95019c8c AS |
360 | static char *thread_result_get(const char *name, |
361 | struct dmatest_thread_result *tr) | |
362 | { | |
363 | static const char * const messages[] = { | |
364 | [DMATEST_ET_OK] = "No errors", | |
365 | [DMATEST_ET_MAP_SRC] = "src mapping error", | |
366 | [DMATEST_ET_MAP_DST] = "dst mapping error", | |
367 | [DMATEST_ET_PREP] = "prep error", | |
368 | [DMATEST_ET_SUBMIT] = "submit error", | |
369 | [DMATEST_ET_TIMEOUT] = "test timed out", | |
370 | [DMATEST_ET_DMA_ERROR] = | |
371 | "got completion callback (DMA_ERROR)", | |
372 | [DMATEST_ET_DMA_IN_PROGRESS] = | |
373 | "got completion callback (DMA_IN_PROGRESS)", | |
374 | [DMATEST_ET_VERIFY] = "errors", | |
d86b2f29 | 375 | [DMATEST_ET_VERIFY_BUF] = "verify errors", |
95019c8c AS |
376 | }; |
377 | static char buf[512]; | |
378 | ||
379 | snprintf(buf, sizeof(buf) - 1, | |
380 | "%s: #%u: %s with src_off=0x%x ""dst_off=0x%x len=0x%x (%lu)", | |
381 | name, tr->n, messages[tr->type], tr->src_off, tr->dst_off, | |
382 | tr->len, tr->data); | |
383 | ||
384 | return buf; | |
385 | } | |
386 | ||
387 | static int thread_result_add(struct dmatest_info *info, | |
388 | struct dmatest_result *r, enum dmatest_error_type type, | |
389 | unsigned int n, unsigned int src_off, unsigned int dst_off, | |
390 | unsigned int len, unsigned long data) | |
391 | { | |
392 | struct dmatest_thread_result *tr; | |
393 | ||
394 | tr = kzalloc(sizeof(*tr), GFP_KERNEL); | |
395 | if (!tr) | |
396 | return -ENOMEM; | |
397 | ||
398 | tr->type = type; | |
399 | tr->n = n; | |
400 | tr->src_off = src_off; | |
401 | tr->dst_off = dst_off; | |
402 | tr->len = len; | |
403 | tr->data = data; | |
404 | ||
405 | mutex_lock(&info->results_lock); | |
406 | list_add_tail(&tr->node, &r->results); | |
407 | mutex_unlock(&info->results_lock); | |
408 | ||
409 | pr_warn("%s\n", thread_result_get(r->name, tr)); | |
410 | return 0; | |
411 | } | |
412 | ||
d86b2f29 AS |
413 | static unsigned int verify_result_add(struct dmatest_info *info, |
414 | struct dmatest_result *r, unsigned int n, | |
415 | unsigned int src_off, unsigned int dst_off, unsigned int len, | |
416 | u8 **bufs, int whence, unsigned int counter, u8 pattern, | |
417 | bool is_srcbuf) | |
418 | { | |
419 | struct dmatest_verify_result *vr; | |
420 | unsigned int error_count; | |
421 | unsigned int buf_off = is_srcbuf ? src_off : dst_off; | |
422 | unsigned int start, end; | |
423 | ||
424 | if (whence < 0) { | |
425 | start = 0; | |
426 | end = buf_off; | |
427 | } else if (whence > 0) { | |
428 | start = buf_off + len; | |
429 | end = info->params.buf_size; | |
430 | } else { | |
431 | start = buf_off; | |
432 | end = buf_off + len; | |
433 | } | |
434 | ||
435 | vr = kmalloc(sizeof(*vr), GFP_KERNEL); | |
436 | if (!vr) { | |
437 | pr_warn("dmatest: No memory to store verify result\n"); | |
438 | return dmatest_verify(NULL, bufs, start, end, counter, pattern, | |
439 | is_srcbuf); | |
440 | } | |
441 | ||
442 | vr->pattern = pattern; | |
443 | vr->is_srcbuf = is_srcbuf; | |
444 | ||
445 | error_count = dmatest_verify(vr, bufs, start, end, counter, pattern, | |
446 | is_srcbuf); | |
447 | if (error_count) { | |
448 | vr->error_count = error_count; | |
449 | thread_result_add(info, r, DMATEST_ET_VERIFY_BUF, n, src_off, | |
450 | dst_off, len, (unsigned long)vr); | |
451 | return error_count; | |
452 | } | |
453 | ||
454 | kfree(vr); | |
455 | return 0; | |
456 | } | |
457 | ||
95019c8c AS |
458 | static void result_free(struct dmatest_info *info, const char *name) |
459 | { | |
460 | struct dmatest_result *r, *_r; | |
461 | ||
462 | mutex_lock(&info->results_lock); | |
463 | list_for_each_entry_safe(r, _r, &info->results, node) { | |
464 | struct dmatest_thread_result *tr, *_tr; | |
465 | ||
466 | if (name && strcmp(r->name, name)) | |
467 | continue; | |
468 | ||
469 | list_for_each_entry_safe(tr, _tr, &r->results, node) { | |
d86b2f29 AS |
470 | if (tr->type == DMATEST_ET_VERIFY_BUF) |
471 | kfree(tr->vr); | |
95019c8c AS |
472 | list_del(&tr->node); |
473 | kfree(tr); | |
474 | } | |
475 | ||
476 | kfree(r->name); | |
477 | list_del(&r->node); | |
478 | kfree(r); | |
479 | } | |
480 | ||
481 | mutex_unlock(&info->results_lock); | |
482 | } | |
483 | ||
484 | static struct dmatest_result *result_init(struct dmatest_info *info, | |
485 | const char *name) | |
486 | { | |
487 | struct dmatest_result *r; | |
488 | ||
489 | r = kzalloc(sizeof(*r), GFP_KERNEL); | |
490 | if (r) { | |
491 | r->name = kstrdup(name, GFP_KERNEL); | |
492 | INIT_LIST_HEAD(&r->results); | |
493 | mutex_lock(&info->results_lock); | |
494 | list_add_tail(&r->node, &info->results); | |
495 | mutex_unlock(&info->results_lock); | |
496 | } | |
497 | return r; | |
498 | } | |
499 | ||
4a776f0a HS |
500 | /* |
501 | * This function repeatedly tests DMA transfers of various lengths and | |
b54d5cb9 DW |
502 | * offsets for a given operation type until it is told to exit by |
503 | * kthread_stop(). There may be multiple threads running this function | |
504 | * in parallel for a single channel, and there may be multiple channels | |
505 | * being tested in parallel. | |
4a776f0a HS |
506 | * |
507 | * Before each test, the source and destination buffer is initialized | |
508 | * with a known pattern. This pattern is different depending on | |
509 | * whether it's in an area which is supposed to be copied or | |
510 | * overwritten, and different in the source and destination buffers. | |
511 | * So if the DMA engine doesn't copy exactly what we tell it to copy, | |
512 | * we'll notice. | |
513 | */ | |
514 | static int dmatest_func(void *data) | |
515 | { | |
adfa543e | 516 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(done_wait); |
4a776f0a | 517 | struct dmatest_thread *thread = data; |
adfa543e | 518 | struct dmatest_done done = { .wait = &done_wait }; |
e03e93a9 | 519 | struct dmatest_info *info; |
15b8a8ea | 520 | struct dmatest_params *params; |
4a776f0a | 521 | struct dma_chan *chan; |
8be9e32b | 522 | struct dma_device *dev; |
4a776f0a HS |
523 | const char *thread_name; |
524 | unsigned int src_off, dst_off, len; | |
525 | unsigned int error_count; | |
526 | unsigned int failed_tests = 0; | |
527 | unsigned int total_tests = 0; | |
528 | dma_cookie_t cookie; | |
529 | enum dma_status status; | |
b54d5cb9 | 530 | enum dma_ctrl_flags flags; |
945b5af3 | 531 | u8 *pq_coefs = NULL; |
4a776f0a | 532 | int ret; |
b54d5cb9 DW |
533 | int src_cnt; |
534 | int dst_cnt; | |
535 | int i; | |
95019c8c | 536 | struct dmatest_result *result; |
4a776f0a HS |
537 | |
538 | thread_name = current->comm; | |
adfa543e | 539 | set_freezable(); |
4a776f0a HS |
540 | |
541 | ret = -ENOMEM; | |
4a776f0a HS |
542 | |
543 | smp_rmb(); | |
e03e93a9 | 544 | info = thread->info; |
15b8a8ea | 545 | params = &info->params; |
4a776f0a | 546 | chan = thread->chan; |
8be9e32b | 547 | dev = chan->device; |
b54d5cb9 DW |
548 | if (thread->type == DMA_MEMCPY) |
549 | src_cnt = dst_cnt = 1; | |
550 | else if (thread->type == DMA_XOR) { | |
8be9e32b | 551 | /* force odd to ensure dst = src */ |
15b8a8ea | 552 | src_cnt = min_odd(params->xor_sources | 1, dev->max_xor); |
b54d5cb9 | 553 | dst_cnt = 1; |
58691d64 | 554 | } else if (thread->type == DMA_PQ) { |
8be9e32b | 555 | /* force odd to ensure dst = src */ |
15b8a8ea | 556 | src_cnt = min_odd(params->pq_sources | 1, dma_maxpq(dev, 0)); |
58691d64 | 557 | dst_cnt = 2; |
945b5af3 | 558 | |
15b8a8ea | 559 | pq_coefs = kmalloc(params->pq_sources+1, GFP_KERNEL); |
945b5af3 AS |
560 | if (!pq_coefs) |
561 | goto err_thread_type; | |
562 | ||
94de648d | 563 | for (i = 0; i < src_cnt; i++) |
58691d64 | 564 | pq_coefs[i] = 1; |
b54d5cb9 | 565 | } else |
945b5af3 | 566 | goto err_thread_type; |
b54d5cb9 | 567 | |
95019c8c AS |
568 | result = result_init(info, thread_name); |
569 | if (!result) | |
570 | goto err_srcs; | |
571 | ||
b54d5cb9 DW |
572 | thread->srcs = kcalloc(src_cnt+1, sizeof(u8 *), GFP_KERNEL); |
573 | if (!thread->srcs) | |
574 | goto err_srcs; | |
575 | for (i = 0; i < src_cnt; i++) { | |
15b8a8ea | 576 | thread->srcs[i] = kmalloc(params->buf_size, GFP_KERNEL); |
b54d5cb9 DW |
577 | if (!thread->srcs[i]) |
578 | goto err_srcbuf; | |
579 | } | |
580 | thread->srcs[i] = NULL; | |
581 | ||
582 | thread->dsts = kcalloc(dst_cnt+1, sizeof(u8 *), GFP_KERNEL); | |
583 | if (!thread->dsts) | |
584 | goto err_dsts; | |
585 | for (i = 0; i < dst_cnt; i++) { | |
15b8a8ea | 586 | thread->dsts[i] = kmalloc(params->buf_size, GFP_KERNEL); |
b54d5cb9 DW |
587 | if (!thread->dsts[i]) |
588 | goto err_dstbuf; | |
589 | } | |
590 | thread->dsts[i] = NULL; | |
591 | ||
e44e0aa3 DW |
592 | set_user_nice(current, 10); |
593 | ||
b203bd3f IS |
594 | /* |
595 | * src buffers are freed by the DMAEngine code with dma_unmap_single() | |
596 | * dst buffers are freed by ourselves below | |
597 | */ | |
598 | flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT | |
599 | | DMA_COMPL_SKIP_DEST_UNMAP | DMA_COMPL_SRC_UNMAP_SINGLE; | |
4a776f0a | 600 | |
0a2ff57d | 601 | while (!kthread_should_stop() |
15b8a8ea | 602 | && !(params->iterations && total_tests >= params->iterations)) { |
b54d5cb9 DW |
603 | struct dma_async_tx_descriptor *tx = NULL; |
604 | dma_addr_t dma_srcs[src_cnt]; | |
605 | dma_addr_t dma_dsts[dst_cnt]; | |
83544ae9 | 606 | u8 align = 0; |
d86be86e | 607 | |
4a776f0a HS |
608 | total_tests++; |
609 | ||
83544ae9 DW |
610 | /* honor alignment restrictions */ |
611 | if (thread->type == DMA_MEMCPY) | |
612 | align = dev->copy_align; | |
613 | else if (thread->type == DMA_XOR) | |
614 | align = dev->xor_align; | |
615 | else if (thread->type == DMA_PQ) | |
616 | align = dev->pq_align; | |
617 | ||
15b8a8ea | 618 | if (1 << align > params->buf_size) { |
cfe4f275 | 619 | pr_err("%u-byte buffer too small for %d-byte alignment\n", |
15b8a8ea | 620 | params->buf_size, 1 << align); |
cfe4f275 GL |
621 | break; |
622 | } | |
623 | ||
15b8a8ea | 624 | len = dmatest_random() % params->buf_size + 1; |
83544ae9 | 625 | len = (len >> align) << align; |
cfe4f275 GL |
626 | if (!len) |
627 | len = 1 << align; | |
15b8a8ea AS |
628 | src_off = dmatest_random() % (params->buf_size - len + 1); |
629 | dst_off = dmatest_random() % (params->buf_size - len + 1); | |
cfe4f275 | 630 | |
83544ae9 DW |
631 | src_off = (src_off >> align) << align; |
632 | dst_off = (dst_off >> align) << align; | |
633 | ||
15b8a8ea AS |
634 | dmatest_init_srcs(thread->srcs, src_off, len, params->buf_size); |
635 | dmatest_init_dsts(thread->dsts, dst_off, len, params->buf_size); | |
4a776f0a | 636 | |
b54d5cb9 DW |
637 | for (i = 0; i < src_cnt; i++) { |
638 | u8 *buf = thread->srcs[i] + src_off; | |
639 | ||
640 | dma_srcs[i] = dma_map_single(dev->dev, buf, len, | |
641 | DMA_TO_DEVICE); | |
afde3be1 AS |
642 | ret = dma_mapping_error(dev->dev, dma_srcs[i]); |
643 | if (ret) { | |
644 | unmap_src(dev->dev, dma_srcs, len, i); | |
95019c8c AS |
645 | thread_result_add(info, result, |
646 | DMATEST_ET_MAP_SRC, | |
647 | total_tests, src_off, dst_off, | |
648 | len, ret); | |
afde3be1 AS |
649 | failed_tests++; |
650 | continue; | |
651 | } | |
b54d5cb9 | 652 | } |
d86be86e | 653 | /* map with DMA_BIDIRECTIONAL to force writeback/invalidate */ |
b54d5cb9 DW |
654 | for (i = 0; i < dst_cnt; i++) { |
655 | dma_dsts[i] = dma_map_single(dev->dev, thread->dsts[i], | |
15b8a8ea | 656 | params->buf_size, |
b54d5cb9 | 657 | DMA_BIDIRECTIONAL); |
afde3be1 AS |
658 | ret = dma_mapping_error(dev->dev, dma_dsts[i]); |
659 | if (ret) { | |
660 | unmap_src(dev->dev, dma_srcs, len, src_cnt); | |
15b8a8ea AS |
661 | unmap_dst(dev->dev, dma_dsts, params->buf_size, |
662 | i); | |
95019c8c AS |
663 | thread_result_add(info, result, |
664 | DMATEST_ET_MAP_DST, | |
665 | total_tests, src_off, dst_off, | |
666 | len, ret); | |
afde3be1 AS |
667 | failed_tests++; |
668 | continue; | |
669 | } | |
b54d5cb9 DW |
670 | } |
671 | ||
672 | if (thread->type == DMA_MEMCPY) | |
673 | tx = dev->device_prep_dma_memcpy(chan, | |
674 | dma_dsts[0] + dst_off, | |
675 | dma_srcs[0], len, | |
676 | flags); | |
677 | else if (thread->type == DMA_XOR) | |
678 | tx = dev->device_prep_dma_xor(chan, | |
679 | dma_dsts[0] + dst_off, | |
67b9124f | 680 | dma_srcs, src_cnt, |
b54d5cb9 | 681 | len, flags); |
58691d64 DW |
682 | else if (thread->type == DMA_PQ) { |
683 | dma_addr_t dma_pq[dst_cnt]; | |
684 | ||
685 | for (i = 0; i < dst_cnt; i++) | |
686 | dma_pq[i] = dma_dsts[i] + dst_off; | |
687 | tx = dev->device_prep_dma_pq(chan, dma_pq, dma_srcs, | |
94de648d | 688 | src_cnt, pq_coefs, |
58691d64 DW |
689 | len, flags); |
690 | } | |
d86be86e | 691 | |
d86be86e | 692 | if (!tx) { |
632fd283 | 693 | unmap_src(dev->dev, dma_srcs, len, src_cnt); |
15b8a8ea AS |
694 | unmap_dst(dev->dev, dma_dsts, params->buf_size, |
695 | dst_cnt); | |
95019c8c AS |
696 | thread_result_add(info, result, DMATEST_ET_PREP, |
697 | total_tests, src_off, dst_off, | |
698 | len, 0); | |
d86be86e AN |
699 | msleep(100); |
700 | failed_tests++; | |
701 | continue; | |
702 | } | |
e44e0aa3 | 703 | |
adfa543e | 704 | done.done = false; |
e44e0aa3 | 705 | tx->callback = dmatest_callback; |
adfa543e | 706 | tx->callback_param = &done; |
d86be86e AN |
707 | cookie = tx->tx_submit(tx); |
708 | ||
4a776f0a | 709 | if (dma_submit_error(cookie)) { |
95019c8c AS |
710 | thread_result_add(info, result, DMATEST_ET_SUBMIT, |
711 | total_tests, src_off, dst_off, | |
712 | len, cookie); | |
4a776f0a HS |
713 | msleep(100); |
714 | failed_tests++; | |
715 | continue; | |
716 | } | |
b54d5cb9 | 717 | dma_async_issue_pending(chan); |
4a776f0a | 718 | |
bcc567e3 | 719 | wait_event_freezable_timeout(done_wait, done.done, |
15b8a8ea | 720 | msecs_to_jiffies(params->timeout)); |
981ed70d | 721 | |
e44e0aa3 | 722 | status = dma_async_is_tx_complete(chan, cookie, NULL, NULL); |
4a776f0a | 723 | |
adfa543e TH |
724 | if (!done.done) { |
725 | /* | |
726 | * We're leaving the timed out dma operation with | |
727 | * dangling pointer to done_wait. To make this | |
728 | * correct, we'll need to allocate wait_done for | |
729 | * each test iteration and perform "who's gonna | |
730 | * free it this time?" dancing. For now, just | |
731 | * leave it dangling. | |
732 | */ | |
95019c8c AS |
733 | thread_result_add(info, result, DMATEST_ET_TIMEOUT, |
734 | total_tests, src_off, dst_off, | |
735 | len, 0); | |
e44e0aa3 DW |
736 | failed_tests++; |
737 | continue; | |
738 | } else if (status != DMA_SUCCESS) { | |
95019c8c AS |
739 | enum dmatest_error_type type = (status == DMA_ERROR) ? |
740 | DMATEST_ET_DMA_ERROR : DMATEST_ET_DMA_IN_PROGRESS; | |
741 | thread_result_add(info, result, type, | |
742 | total_tests, src_off, dst_off, | |
743 | len, status); | |
4a776f0a HS |
744 | failed_tests++; |
745 | continue; | |
746 | } | |
e44e0aa3 | 747 | |
d86be86e | 748 | /* Unmap by myself (see DMA_COMPL_SKIP_DEST_UNMAP above) */ |
15b8a8ea | 749 | unmap_dst(dev->dev, dma_dsts, params->buf_size, dst_cnt); |
4a776f0a HS |
750 | |
751 | error_count = 0; | |
752 | ||
753 | pr_debug("%s: verifying source buffer...\n", thread_name); | |
d86b2f29 AS |
754 | error_count += verify_result_add(info, result, total_tests, |
755 | src_off, dst_off, len, thread->srcs, -1, | |
4a776f0a | 756 | 0, PATTERN_SRC, true); |
d86b2f29 AS |
757 | error_count += verify_result_add(info, result, total_tests, |
758 | src_off, dst_off, len, thread->srcs, 0, | |
759 | src_off, PATTERN_SRC | PATTERN_COPY, true); | |
760 | error_count += verify_result_add(info, result, total_tests, | |
761 | src_off, dst_off, len, thread->srcs, 1, | |
762 | src_off + len, PATTERN_SRC, true); | |
763 | ||
764 | pr_debug("%s: verifying dest buffer...\n", thread_name); | |
765 | error_count += verify_result_add(info, result, total_tests, | |
766 | src_off, dst_off, len, thread->dsts, -1, | |
4a776f0a | 767 | 0, PATTERN_DST, false); |
d86b2f29 AS |
768 | error_count += verify_result_add(info, result, total_tests, |
769 | src_off, dst_off, len, thread->dsts, 0, | |
770 | src_off, PATTERN_SRC | PATTERN_COPY, false); | |
771 | error_count += verify_result_add(info, result, total_tests, | |
772 | src_off, dst_off, len, thread->dsts, 1, | |
773 | dst_off + len, PATTERN_DST, false); | |
4a776f0a HS |
774 | |
775 | if (error_count) { | |
95019c8c AS |
776 | thread_result_add(info, result, DMATEST_ET_VERIFY, |
777 | total_tests, src_off, dst_off, | |
778 | len, error_count); | |
4a776f0a HS |
779 | failed_tests++; |
780 | } else { | |
95019c8c AS |
781 | thread_result_add(info, result, DMATEST_ET_OK, |
782 | total_tests, src_off, dst_off, | |
783 | len, 0); | |
4a776f0a HS |
784 | } |
785 | } | |
786 | ||
787 | ret = 0; | |
b54d5cb9 DW |
788 | for (i = 0; thread->dsts[i]; i++) |
789 | kfree(thread->dsts[i]); | |
4a776f0a | 790 | err_dstbuf: |
b54d5cb9 DW |
791 | kfree(thread->dsts); |
792 | err_dsts: | |
793 | for (i = 0; thread->srcs[i]; i++) | |
794 | kfree(thread->srcs[i]); | |
4a776f0a | 795 | err_srcbuf: |
b54d5cb9 DW |
796 | kfree(thread->srcs); |
797 | err_srcs: | |
945b5af3 AS |
798 | kfree(pq_coefs); |
799 | err_thread_type: | |
4a776f0a HS |
800 | pr_notice("%s: terminating after %u tests, %u failures (status %d)\n", |
801 | thread_name, total_tests, failed_tests, ret); | |
0a2ff57d | 802 | |
9704efaa | 803 | /* terminate all transfers on specified channels */ |
5e034f7b SH |
804 | if (ret) |
805 | dmaengine_terminate_all(chan); | |
806 | ||
3e5ccd86 AS |
807 | thread->done = true; |
808 | ||
15b8a8ea | 809 | if (params->iterations > 0) |
0a2ff57d | 810 | while (!kthread_should_stop()) { |
b953df7c | 811 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wait_dmatest_exit); |
0a2ff57d NF |
812 | interruptible_sleep_on(&wait_dmatest_exit); |
813 | } | |
814 | ||
4a776f0a HS |
815 | return ret; |
816 | } | |
817 | ||
818 | static void dmatest_cleanup_channel(struct dmatest_chan *dtc) | |
819 | { | |
820 | struct dmatest_thread *thread; | |
821 | struct dmatest_thread *_thread; | |
822 | int ret; | |
823 | ||
824 | list_for_each_entry_safe(thread, _thread, &dtc->threads, node) { | |
825 | ret = kthread_stop(thread->task); | |
826 | pr_debug("dmatest: thread %s exited with status %d\n", | |
827 | thread->task->comm, ret); | |
828 | list_del(&thread->node); | |
829 | kfree(thread); | |
830 | } | |
9704efaa VK |
831 | |
832 | /* terminate all transfers on specified channels */ | |
944ea4dd | 833 | dmaengine_terminate_all(dtc->chan); |
9704efaa | 834 | |
4a776f0a HS |
835 | kfree(dtc); |
836 | } | |
837 | ||
e03e93a9 AS |
838 | static int dmatest_add_threads(struct dmatest_info *info, |
839 | struct dmatest_chan *dtc, enum dma_transaction_type type) | |
4a776f0a | 840 | { |
15b8a8ea | 841 | struct dmatest_params *params = &info->params; |
b54d5cb9 DW |
842 | struct dmatest_thread *thread; |
843 | struct dma_chan *chan = dtc->chan; | |
844 | char *op; | |
845 | unsigned int i; | |
4a776f0a | 846 | |
b54d5cb9 DW |
847 | if (type == DMA_MEMCPY) |
848 | op = "copy"; | |
849 | else if (type == DMA_XOR) | |
850 | op = "xor"; | |
58691d64 DW |
851 | else if (type == DMA_PQ) |
852 | op = "pq"; | |
b54d5cb9 DW |
853 | else |
854 | return -EINVAL; | |
4a776f0a | 855 | |
15b8a8ea | 856 | for (i = 0; i < params->threads_per_chan; i++) { |
4a776f0a HS |
857 | thread = kzalloc(sizeof(struct dmatest_thread), GFP_KERNEL); |
858 | if (!thread) { | |
b54d5cb9 DW |
859 | pr_warning("dmatest: No memory for %s-%s%u\n", |
860 | dma_chan_name(chan), op, i); | |
861 | ||
4a776f0a HS |
862 | break; |
863 | } | |
e03e93a9 | 864 | thread->info = info; |
4a776f0a | 865 | thread->chan = dtc->chan; |
b54d5cb9 | 866 | thread->type = type; |
4a776f0a | 867 | smp_wmb(); |
b54d5cb9 DW |
868 | thread->task = kthread_run(dmatest_func, thread, "%s-%s%u", |
869 | dma_chan_name(chan), op, i); | |
4a776f0a | 870 | if (IS_ERR(thread->task)) { |
b54d5cb9 DW |
871 | pr_warning("dmatest: Failed to run thread %s-%s%u\n", |
872 | dma_chan_name(chan), op, i); | |
4a776f0a HS |
873 | kfree(thread); |
874 | break; | |
875 | } | |
876 | ||
877 | /* srcbuf and dstbuf are allocated by the thread itself */ | |
878 | ||
879 | list_add_tail(&thread->node, &dtc->threads); | |
880 | } | |
881 | ||
b54d5cb9 DW |
882 | return i; |
883 | } | |
884 | ||
e03e93a9 AS |
885 | static int dmatest_add_channel(struct dmatest_info *info, |
886 | struct dma_chan *chan) | |
b54d5cb9 DW |
887 | { |
888 | struct dmatest_chan *dtc; | |
889 | struct dma_device *dma_dev = chan->device; | |
890 | unsigned int thread_count = 0; | |
b9033e68 | 891 | int cnt; |
b54d5cb9 DW |
892 | |
893 | dtc = kmalloc(sizeof(struct dmatest_chan), GFP_KERNEL); | |
894 | if (!dtc) { | |
895 | pr_warning("dmatest: No memory for %s\n", dma_chan_name(chan)); | |
896 | return -ENOMEM; | |
897 | } | |
898 | ||
899 | dtc->chan = chan; | |
900 | INIT_LIST_HEAD(&dtc->threads); | |
901 | ||
902 | if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) { | |
e03e93a9 | 903 | cnt = dmatest_add_threads(info, dtc, DMA_MEMCPY); |
f1aef8b6 | 904 | thread_count += cnt > 0 ? cnt : 0; |
b54d5cb9 DW |
905 | } |
906 | if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) { | |
e03e93a9 | 907 | cnt = dmatest_add_threads(info, dtc, DMA_XOR); |
f1aef8b6 | 908 | thread_count += cnt > 0 ? cnt : 0; |
b54d5cb9 | 909 | } |
58691d64 | 910 | if (dma_has_cap(DMA_PQ, dma_dev->cap_mask)) { |
e03e93a9 | 911 | cnt = dmatest_add_threads(info, dtc, DMA_PQ); |
d07a74a5 | 912 | thread_count += cnt > 0 ? cnt : 0; |
58691d64 | 913 | } |
b54d5cb9 DW |
914 | |
915 | pr_info("dmatest: Started %u threads using %s\n", | |
916 | thread_count, dma_chan_name(chan)); | |
4a776f0a | 917 | |
838cc704 AS |
918 | list_add_tail(&dtc->node, &info->channels); |
919 | info->nr_channels++; | |
4a776f0a | 920 | |
33df8ca0 | 921 | return 0; |
4a776f0a HS |
922 | } |
923 | ||
7dd60251 | 924 | static bool filter(struct dma_chan *chan, void *param) |
4a776f0a | 925 | { |
15b8a8ea | 926 | struct dmatest_params *params = param; |
e03e93a9 | 927 | |
15b8a8ea AS |
928 | if (!dmatest_match_channel(params, chan) || |
929 | !dmatest_match_device(params, chan->device)) | |
7dd60251 | 930 | return false; |
33df8ca0 | 931 | else |
7dd60251 | 932 | return true; |
4a776f0a HS |
933 | } |
934 | ||
851b7e16 | 935 | static int __run_threaded_test(struct dmatest_info *info) |
4a776f0a | 936 | { |
33df8ca0 DW |
937 | dma_cap_mask_t mask; |
938 | struct dma_chan *chan; | |
15b8a8ea | 939 | struct dmatest_params *params = &info->params; |
33df8ca0 DW |
940 | int err = 0; |
941 | ||
942 | dma_cap_zero(mask); | |
943 | dma_cap_set(DMA_MEMCPY, mask); | |
944 | for (;;) { | |
15b8a8ea | 945 | chan = dma_request_channel(mask, filter, params); |
33df8ca0 | 946 | if (chan) { |
e03e93a9 | 947 | err = dmatest_add_channel(info, chan); |
c56c81ab | 948 | if (err) { |
33df8ca0 DW |
949 | dma_release_channel(chan); |
950 | break; /* add_channel failed, punt */ | |
951 | } | |
952 | } else | |
953 | break; /* no more channels available */ | |
15b8a8ea AS |
954 | if (params->max_channels && |
955 | info->nr_channels >= params->max_channels) | |
33df8ca0 DW |
956 | break; /* we have all we need */ |
957 | } | |
33df8ca0 | 958 | return err; |
4a776f0a | 959 | } |
4a776f0a | 960 | |
851b7e16 AS |
961 | #ifndef MODULE |
962 | static int run_threaded_test(struct dmatest_info *info) | |
963 | { | |
964 | int ret; | |
965 | ||
966 | mutex_lock(&info->lock); | |
967 | ret = __run_threaded_test(info); | |
968 | mutex_unlock(&info->lock); | |
969 | return ret; | |
970 | } | |
971 | #endif | |
972 | ||
973 | static void __stop_threaded_test(struct dmatest_info *info) | |
4a776f0a | 974 | { |
33df8ca0 | 975 | struct dmatest_chan *dtc, *_dtc; |
7cbd4877 | 976 | struct dma_chan *chan; |
33df8ca0 | 977 | |
838cc704 | 978 | list_for_each_entry_safe(dtc, _dtc, &info->channels, node) { |
33df8ca0 | 979 | list_del(&dtc->node); |
7cbd4877 | 980 | chan = dtc->chan; |
33df8ca0 | 981 | dmatest_cleanup_channel(dtc); |
838cc704 | 982 | pr_debug("dmatest: dropped channel %s\n", dma_chan_name(chan)); |
7cbd4877 | 983 | dma_release_channel(chan); |
33df8ca0 | 984 | } |
838cc704 AS |
985 | |
986 | info->nr_channels = 0; | |
4a776f0a | 987 | } |
e03e93a9 | 988 | |
851b7e16 AS |
989 | static void stop_threaded_test(struct dmatest_info *info) |
990 | { | |
991 | mutex_lock(&info->lock); | |
992 | __stop_threaded_test(info); | |
993 | mutex_unlock(&info->lock); | |
994 | } | |
995 | ||
996 | static int __restart_threaded_test(struct dmatest_info *info, bool run) | |
997 | { | |
998 | struct dmatest_params *params = &info->params; | |
851b7e16 AS |
999 | |
1000 | /* Stop any running test first */ | |
1001 | __stop_threaded_test(info); | |
1002 | ||
1003 | if (run == false) | |
1004 | return 0; | |
1005 | ||
95019c8c AS |
1006 | /* Clear results from previous run */ |
1007 | result_free(info, NULL); | |
1008 | ||
851b7e16 AS |
1009 | /* Copy test parameters */ |
1010 | memcpy(params, &info->dbgfs_params, sizeof(*params)); | |
1011 | ||
1012 | /* Run test with new parameters */ | |
bcc567e3 AS |
1013 | return __run_threaded_test(info); |
1014 | } | |
1015 | ||
1016 | static bool __is_threaded_test_run(struct dmatest_info *info) | |
1017 | { | |
1018 | struct dmatest_chan *dtc; | |
1019 | ||
1020 | list_for_each_entry(dtc, &info->channels, node) { | |
1021 | struct dmatest_thread *thread; | |
1022 | ||
1023 | list_for_each_entry(thread, &dtc->threads, node) { | |
1024 | if (!thread->done) | |
1025 | return true; | |
1026 | } | |
851b7e16 AS |
1027 | } |
1028 | ||
bcc567e3 | 1029 | return false; |
851b7e16 AS |
1030 | } |
1031 | ||
1032 | static ssize_t dtf_write_string(void *to, size_t available, loff_t *ppos, | |
1033 | const void __user *from, size_t count) | |
1034 | { | |
1035 | char tmp[20]; | |
1036 | ssize_t len; | |
1037 | ||
1038 | len = simple_write_to_buffer(tmp, sizeof(tmp) - 1, ppos, from, count); | |
1039 | if (len >= 0) { | |
1040 | tmp[len] = '\0'; | |
1041 | strlcpy(to, strim(tmp), available); | |
1042 | } | |
1043 | ||
1044 | return len; | |
1045 | } | |
1046 | ||
1047 | static ssize_t dtf_read_channel(struct file *file, char __user *buf, | |
1048 | size_t count, loff_t *ppos) | |
1049 | { | |
1050 | struct dmatest_info *info = file->private_data; | |
1051 | return simple_read_from_buffer(buf, count, ppos, | |
1052 | info->dbgfs_params.channel, | |
1053 | strlen(info->dbgfs_params.channel)); | |
1054 | } | |
1055 | ||
1056 | static ssize_t dtf_write_channel(struct file *file, const char __user *buf, | |
1057 | size_t size, loff_t *ppos) | |
1058 | { | |
1059 | struct dmatest_info *info = file->private_data; | |
1060 | return dtf_write_string(info->dbgfs_params.channel, | |
1061 | sizeof(info->dbgfs_params.channel), | |
1062 | ppos, buf, size); | |
1063 | } | |
1064 | ||
1065 | static const struct file_operations dtf_channel_fops = { | |
1066 | .read = dtf_read_channel, | |
1067 | .write = dtf_write_channel, | |
1068 | .open = simple_open, | |
1069 | .llseek = default_llseek, | |
1070 | }; | |
1071 | ||
1072 | static ssize_t dtf_read_device(struct file *file, char __user *buf, | |
1073 | size_t count, loff_t *ppos) | |
1074 | { | |
1075 | struct dmatest_info *info = file->private_data; | |
1076 | return simple_read_from_buffer(buf, count, ppos, | |
1077 | info->dbgfs_params.device, | |
1078 | strlen(info->dbgfs_params.device)); | |
1079 | } | |
1080 | ||
1081 | static ssize_t dtf_write_device(struct file *file, const char __user *buf, | |
1082 | size_t size, loff_t *ppos) | |
1083 | { | |
1084 | struct dmatest_info *info = file->private_data; | |
1085 | return dtf_write_string(info->dbgfs_params.device, | |
1086 | sizeof(info->dbgfs_params.device), | |
1087 | ppos, buf, size); | |
1088 | } | |
1089 | ||
1090 | static const struct file_operations dtf_device_fops = { | |
1091 | .read = dtf_read_device, | |
1092 | .write = dtf_write_device, | |
1093 | .open = simple_open, | |
1094 | .llseek = default_llseek, | |
1095 | }; | |
1096 | ||
1097 | static ssize_t dtf_read_run(struct file *file, char __user *user_buf, | |
1098 | size_t count, loff_t *ppos) | |
1099 | { | |
1100 | struct dmatest_info *info = file->private_data; | |
1101 | char buf[3]; | |
1102 | ||
1103 | mutex_lock(&info->lock); | |
3e5ccd86 | 1104 | |
bcc567e3 | 1105 | if (__is_threaded_test_run(info)) { |
851b7e16 | 1106 | buf[0] = 'Y'; |
3e5ccd86 AS |
1107 | } else { |
1108 | __stop_threaded_test(info); | |
851b7e16 | 1109 | buf[0] = 'N'; |
3e5ccd86 AS |
1110 | } |
1111 | ||
851b7e16 AS |
1112 | mutex_unlock(&info->lock); |
1113 | buf[1] = '\n'; | |
1114 | buf[2] = 0x00; | |
1115 | return simple_read_from_buffer(user_buf, count, ppos, buf, 2); | |
1116 | } | |
1117 | ||
1118 | static ssize_t dtf_write_run(struct file *file, const char __user *user_buf, | |
1119 | size_t count, loff_t *ppos) | |
1120 | { | |
1121 | struct dmatest_info *info = file->private_data; | |
1122 | char buf[16]; | |
1123 | bool bv; | |
1124 | int ret = 0; | |
1125 | ||
1126 | if (copy_from_user(buf, user_buf, min(count, (sizeof(buf) - 1)))) | |
1127 | return -EFAULT; | |
1128 | ||
1129 | if (strtobool(buf, &bv) == 0) { | |
1130 | mutex_lock(&info->lock); | |
bcc567e3 AS |
1131 | |
1132 | if (__is_threaded_test_run(info)) | |
1133 | ret = -EBUSY; | |
1134 | else | |
1135 | ret = __restart_threaded_test(info, bv); | |
1136 | ||
851b7e16 AS |
1137 | mutex_unlock(&info->lock); |
1138 | } | |
1139 | ||
1140 | return ret ? ret : count; | |
1141 | } | |
1142 | ||
1143 | static const struct file_operations dtf_run_fops = { | |
1144 | .read = dtf_read_run, | |
1145 | .write = dtf_write_run, | |
1146 | .open = simple_open, | |
1147 | .llseek = default_llseek, | |
1148 | }; | |
1149 | ||
95019c8c AS |
1150 | static int dtf_results_show(struct seq_file *sf, void *data) |
1151 | { | |
1152 | struct dmatest_info *info = sf->private; | |
1153 | struct dmatest_result *result; | |
1154 | struct dmatest_thread_result *tr; | |
d86b2f29 | 1155 | unsigned int i; |
95019c8c AS |
1156 | |
1157 | mutex_lock(&info->results_lock); | |
1158 | list_for_each_entry(result, &info->results, node) { | |
d86b2f29 | 1159 | list_for_each_entry(tr, &result->results, node) { |
95019c8c AS |
1160 | seq_printf(sf, "%s\n", |
1161 | thread_result_get(result->name, tr)); | |
d86b2f29 AS |
1162 | if (tr->type == DMATEST_ET_VERIFY_BUF) { |
1163 | for (i = 0; i < tr->vr->error_count; i++) { | |
1164 | seq_printf(sf, "\t%s\n", | |
1165 | verify_result_get_one(tr->vr, i)); | |
1166 | } | |
1167 | } | |
1168 | } | |
95019c8c AS |
1169 | } |
1170 | ||
1171 | mutex_unlock(&info->results_lock); | |
1172 | return 0; | |
1173 | } | |
1174 | ||
1175 | static int dtf_results_open(struct inode *inode, struct file *file) | |
1176 | { | |
1177 | return single_open(file, dtf_results_show, inode->i_private); | |
1178 | } | |
1179 | ||
1180 | static const struct file_operations dtf_results_fops = { | |
1181 | .open = dtf_results_open, | |
1182 | .read = seq_read, | |
1183 | .llseek = seq_lseek, | |
1184 | .release = single_release, | |
1185 | }; | |
1186 | ||
851b7e16 AS |
1187 | static int dmatest_register_dbgfs(struct dmatest_info *info) |
1188 | { | |
1189 | struct dentry *d; | |
1190 | struct dmatest_params *params = &info->dbgfs_params; | |
1191 | int ret = -ENOMEM; | |
1192 | ||
1193 | d = debugfs_create_dir("dmatest", NULL); | |
1194 | if (IS_ERR(d)) | |
1195 | return PTR_ERR(d); | |
1196 | if (!d) | |
1197 | goto err_root; | |
1198 | ||
1199 | info->root = d; | |
1200 | ||
1201 | /* Copy initial values */ | |
1202 | memcpy(params, &info->params, sizeof(*params)); | |
1203 | ||
1204 | /* Test parameters */ | |
1205 | ||
1206 | d = debugfs_create_u32("test_buf_size", S_IWUSR | S_IRUGO, info->root, | |
1207 | (u32 *)¶ms->buf_size); | |
1208 | if (IS_ERR_OR_NULL(d)) | |
1209 | goto err_node; | |
1210 | ||
1211 | d = debugfs_create_file("channel", S_IRUGO | S_IWUSR, info->root, | |
1212 | info, &dtf_channel_fops); | |
1213 | if (IS_ERR_OR_NULL(d)) | |
1214 | goto err_node; | |
1215 | ||
1216 | d = debugfs_create_file("device", S_IRUGO | S_IWUSR, info->root, | |
1217 | info, &dtf_device_fops); | |
1218 | if (IS_ERR_OR_NULL(d)) | |
1219 | goto err_node; | |
1220 | ||
1221 | d = debugfs_create_u32("threads_per_chan", S_IWUSR | S_IRUGO, info->root, | |
1222 | (u32 *)¶ms->threads_per_chan); | |
1223 | if (IS_ERR_OR_NULL(d)) | |
1224 | goto err_node; | |
1225 | ||
1226 | d = debugfs_create_u32("max_channels", S_IWUSR | S_IRUGO, info->root, | |
1227 | (u32 *)¶ms->max_channels); | |
1228 | if (IS_ERR_OR_NULL(d)) | |
1229 | goto err_node; | |
1230 | ||
1231 | d = debugfs_create_u32("iterations", S_IWUSR | S_IRUGO, info->root, | |
1232 | (u32 *)¶ms->iterations); | |
1233 | if (IS_ERR_OR_NULL(d)) | |
1234 | goto err_node; | |
1235 | ||
1236 | d = debugfs_create_u32("xor_sources", S_IWUSR | S_IRUGO, info->root, | |
1237 | (u32 *)¶ms->xor_sources); | |
1238 | if (IS_ERR_OR_NULL(d)) | |
1239 | goto err_node; | |
1240 | ||
1241 | d = debugfs_create_u32("pq_sources", S_IWUSR | S_IRUGO, info->root, | |
1242 | (u32 *)¶ms->pq_sources); | |
1243 | if (IS_ERR_OR_NULL(d)) | |
1244 | goto err_node; | |
1245 | ||
1246 | d = debugfs_create_u32("timeout", S_IWUSR | S_IRUGO, info->root, | |
1247 | (u32 *)¶ms->timeout); | |
1248 | if (IS_ERR_OR_NULL(d)) | |
1249 | goto err_node; | |
1250 | ||
1251 | /* Run or stop threaded test */ | |
1252 | d = debugfs_create_file("run", S_IWUSR | S_IRUGO, info->root, | |
1253 | info, &dtf_run_fops); | |
1254 | if (IS_ERR_OR_NULL(d)) | |
1255 | goto err_node; | |
1256 | ||
95019c8c AS |
1257 | /* Results of test in progress */ |
1258 | d = debugfs_create_file("results", S_IRUGO, info->root, info, | |
1259 | &dtf_results_fops); | |
1260 | if (IS_ERR_OR_NULL(d)) | |
1261 | goto err_node; | |
1262 | ||
851b7e16 AS |
1263 | return 0; |
1264 | ||
1265 | err_node: | |
1266 | debugfs_remove_recursive(info->root); | |
1267 | err_root: | |
1268 | pr_err("dmatest: Failed to initialize debugfs\n"); | |
1269 | return ret; | |
1270 | } | |
1271 | ||
e03e93a9 AS |
1272 | static int __init dmatest_init(void) |
1273 | { | |
1274 | struct dmatest_info *info = &test_info; | |
15b8a8ea | 1275 | struct dmatest_params *params = &info->params; |
851b7e16 | 1276 | int ret; |
e03e93a9 AS |
1277 | |
1278 | memset(info, 0, sizeof(*info)); | |
1279 | ||
851b7e16 | 1280 | mutex_init(&info->lock); |
838cc704 AS |
1281 | INIT_LIST_HEAD(&info->channels); |
1282 | ||
95019c8c AS |
1283 | mutex_init(&info->results_lock); |
1284 | INIT_LIST_HEAD(&info->results); | |
1285 | ||
838cc704 | 1286 | /* Set default parameters */ |
15b8a8ea AS |
1287 | params->buf_size = test_buf_size; |
1288 | strlcpy(params->channel, test_channel, sizeof(params->channel)); | |
1289 | strlcpy(params->device, test_device, sizeof(params->device)); | |
1290 | params->threads_per_chan = threads_per_chan; | |
1291 | params->max_channels = max_channels; | |
1292 | params->iterations = iterations; | |
1293 | params->xor_sources = xor_sources; | |
1294 | params->pq_sources = pq_sources; | |
1295 | params->timeout = timeout; | |
e03e93a9 | 1296 | |
851b7e16 AS |
1297 | ret = dmatest_register_dbgfs(info); |
1298 | if (ret) | |
1299 | return ret; | |
1300 | ||
1301 | #ifdef MODULE | |
1302 | return 0; | |
1303 | #else | |
e03e93a9 | 1304 | return run_threaded_test(info); |
851b7e16 | 1305 | #endif |
e03e93a9 AS |
1306 | } |
1307 | /* when compiled-in wait for drivers to load first */ | |
1308 | late_initcall(dmatest_init); | |
1309 | ||
1310 | static void __exit dmatest_exit(void) | |
1311 | { | |
1312 | struct dmatest_info *info = &test_info; | |
1313 | ||
851b7e16 | 1314 | debugfs_remove_recursive(info->root); |
e03e93a9 | 1315 | stop_threaded_test(info); |
95019c8c | 1316 | result_free(info, NULL); |
e03e93a9 | 1317 | } |
4a776f0a HS |
1318 | module_exit(dmatest_exit); |
1319 | ||
e05503ef | 1320 | MODULE_AUTHOR("Haavard Skinnemoen (Atmel)"); |
4a776f0a | 1321 | MODULE_LICENSE("GPL v2"); |