This source file includes following definitions.
- is_threaded_test_run
- is_threaded_test_pending
- dmatest_wait_get
- dmatest_match_channel
- dmatest_match_device
- dmatest_random
- gen_inv_idx
- gen_src_value
- gen_dst_value
- dmatest_init_srcs
- dmatest_init_dsts
- dmatest_mismatch
- dmatest_verify
- dmatest_callback
- min_odd
- result
- dbg_result
- dmatest_persec
- dmatest_KBs
- __dmatest_free_test_data
- dmatest_free_test_data
- dmatest_alloc_test_data
- dmatest_func
- dmatest_cleanup_channel
- dmatest_add_threads
- dmatest_add_channel
- filter
- request_channels
- add_threaded_test
- run_pending_tests
- stop_threaded_test
- start_threaded_tests
- dmatest_run_get
- dmatest_run_set
- dmatest_chan_set
- dmatest_chan_get
- dmatest_test_list_get
- dmatest_init
- dmatest_exit
1
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6
7
8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9
10 #include <linux/delay.h>
11 #include <linux/dma-mapping.h>
12 #include <linux/dmaengine.h>
13 #include <linux/freezer.h>
14 #include <linux/init.h>
15 #include <linux/kthread.h>
16 #include <linux/sched/task.h>
17 #include <linux/module.h>
18 #include <linux/moduleparam.h>
19 #include <linux/random.h>
20 #include <linux/slab.h>
21 #include <linux/wait.h>
22
23 static unsigned int test_buf_size = 16384;
24 module_param(test_buf_size, uint, S_IRUGO | S_IWUSR);
25 MODULE_PARM_DESC(test_buf_size, "Size of the memcpy test buffer");
26
27 static char test_device[32];
28 module_param_string(device, test_device, sizeof(test_device),
29 S_IRUGO | S_IWUSR);
30 MODULE_PARM_DESC(device, "Bus ID of the DMA Engine to test (default: any)");
31
32 static unsigned int threads_per_chan = 1;
33 module_param(threads_per_chan, uint, S_IRUGO | S_IWUSR);
34 MODULE_PARM_DESC(threads_per_chan,
35 "Number of threads to start per channel (default: 1)");
36
37 static unsigned int max_channels;
38 module_param(max_channels, uint, S_IRUGO | S_IWUSR);
39 MODULE_PARM_DESC(max_channels,
40 "Maximum number of channels to use (default: all)");
41
42 static unsigned int iterations;
43 module_param(iterations, uint, S_IRUGO | S_IWUSR);
44 MODULE_PARM_DESC(iterations,
45 "Iterations before stopping test (default: infinite)");
46
47 static unsigned int dmatest;
48 module_param(dmatest, uint, S_IRUGO | S_IWUSR);
49 MODULE_PARM_DESC(dmatest,
50 "dmatest 0-memcpy 1-memset (default: 0)");
51
52 static unsigned int xor_sources = 3;
53 module_param(xor_sources, uint, S_IRUGO | S_IWUSR);
54 MODULE_PARM_DESC(xor_sources,
55 "Number of xor source buffers (default: 3)");
56
57 static unsigned int pq_sources = 3;
58 module_param(pq_sources, uint, S_IRUGO | S_IWUSR);
59 MODULE_PARM_DESC(pq_sources,
60 "Number of p+q source buffers (default: 3)");
61
62 static int timeout = 3000;
63 module_param(timeout, uint, S_IRUGO | S_IWUSR);
64 MODULE_PARM_DESC(timeout, "Transfer Timeout in msec (default: 3000), "
65 "Pass 0xFFFFFFFF (4294967295) for maximum timeout");
66
67 static bool noverify;
68 module_param(noverify, bool, S_IRUGO | S_IWUSR);
69 MODULE_PARM_DESC(noverify, "Disable data verification (default: verify)");
70
71 static bool norandom;
72 module_param(norandom, bool, 0644);
73 MODULE_PARM_DESC(norandom, "Disable random offset setup (default: random)");
74
75 static bool polled;
76 module_param(polled, bool, S_IRUGO | S_IWUSR);
77 MODULE_PARM_DESC(polled, "Use polling for completion instead of interrupts");
78
79 static bool verbose;
80 module_param(verbose, bool, S_IRUGO | S_IWUSR);
81 MODULE_PARM_DESC(verbose, "Enable \"success\" result messages (default: off)");
82
83 static int alignment = -1;
84 module_param(alignment, int, 0644);
85 MODULE_PARM_DESC(alignment, "Custom data address alignment taken as 2^(alignment) (default: not used (-1))");
86
87 static unsigned int transfer_size;
88 module_param(transfer_size, uint, 0644);
89 MODULE_PARM_DESC(transfer_size, "Optional custom transfer size in bytes (default: not used (0))");
90
91
92
93
94
95
96
97
98
99
100
101
102
103 struct dmatest_params {
104 unsigned int buf_size;
105 char channel[20];
106 char device[32];
107 unsigned int threads_per_chan;
108 unsigned int max_channels;
109 unsigned int iterations;
110 unsigned int xor_sources;
111 unsigned int pq_sources;
112 unsigned int timeout;
113 bool noverify;
114 bool norandom;
115 int alignment;
116 unsigned int transfer_size;
117 bool polled;
118 };
119
120
121
122
123
124
125 static struct dmatest_info {
126
127 struct dmatest_params params;
128
129
130 struct list_head channels;
131 unsigned int nr_channels;
132 struct mutex lock;
133 bool did_init;
134 } test_info = {
135 .channels = LIST_HEAD_INIT(test_info.channels),
136 .lock = __MUTEX_INITIALIZER(test_info.lock),
137 };
138
139 static int dmatest_run_set(const char *val, const struct kernel_param *kp);
140 static int dmatest_run_get(char *val, const struct kernel_param *kp);
141 static const struct kernel_param_ops run_ops = {
142 .set = dmatest_run_set,
143 .get = dmatest_run_get,
144 };
145 static bool dmatest_run;
146 module_param_cb(run, &run_ops, &dmatest_run, S_IRUGO | S_IWUSR);
147 MODULE_PARM_DESC(run, "Run the test (default: false)");
148
149 static int dmatest_chan_set(const char *val, const struct kernel_param *kp);
150 static int dmatest_chan_get(char *val, const struct kernel_param *kp);
151 static const struct kernel_param_ops multi_chan_ops = {
152 .set = dmatest_chan_set,
153 .get = dmatest_chan_get,
154 };
155
156 static char test_channel[20];
157 static struct kparam_string newchan_kps = {
158 .string = test_channel,
159 .maxlen = 20,
160 };
161 module_param_cb(channel, &multi_chan_ops, &newchan_kps, 0644);
162 MODULE_PARM_DESC(channel, "Bus ID of the channel to test (default: any)");
163
164 static int dmatest_test_list_get(char *val, const struct kernel_param *kp);
165 static const struct kernel_param_ops test_list_ops = {
166 .get = dmatest_test_list_get,
167 };
168 module_param_cb(test_list, &test_list_ops, NULL, 0444);
169 MODULE_PARM_DESC(test_list, "Print current test list");
170
171
172 #define MAX_ERROR_COUNT 32
173
174
175
176
177
178
179
180
181
182
183
184
185 #define PATTERN_SRC 0x80
186 #define PATTERN_DST 0x00
187 #define PATTERN_COPY 0x40
188 #define PATTERN_OVERWRITE 0x20
189 #define PATTERN_COUNT_MASK 0x1f
190 #define PATTERN_MEMSET_IDX 0x01
191
192
193 #define FIXPT_SHIFT 8
194 #define FIXPNT_MASK 0xFF
195 #define FIXPT_TO_INT(a) ((a) >> FIXPT_SHIFT)
196 #define INT_TO_FIXPT(a) ((a) << FIXPT_SHIFT)
197 #define FIXPT_GET_FRAC(a) ((((a) & FIXPNT_MASK) * 100) >> FIXPT_SHIFT)
198
199
200 struct dmatest_done {
201 bool done;
202 wait_queue_head_t *wait;
203 };
204
205 struct dmatest_data {
206 u8 **raw;
207 u8 **aligned;
208 unsigned int cnt;
209 unsigned int off;
210 };
211
212 struct dmatest_thread {
213 struct list_head node;
214 struct dmatest_info *info;
215 struct task_struct *task;
216 struct dma_chan *chan;
217 struct dmatest_data src;
218 struct dmatest_data dst;
219 enum dma_transaction_type type;
220 wait_queue_head_t done_wait;
221 struct dmatest_done test_done;
222 bool done;
223 bool pending;
224 };
225
226 struct dmatest_chan {
227 struct list_head node;
228 struct dma_chan *chan;
229 struct list_head threads;
230 };
231
232 static DECLARE_WAIT_QUEUE_HEAD(thread_wait);
233 static bool wait;
234
235 static bool is_threaded_test_run(struct dmatest_info *info)
236 {
237 struct dmatest_chan *dtc;
238
239 list_for_each_entry(dtc, &info->channels, node) {
240 struct dmatest_thread *thread;
241
242 list_for_each_entry(thread, &dtc->threads, node) {
243 if (!thread->done && !thread->pending)
244 return true;
245 }
246 }
247
248 return false;
249 }
250
251 static bool is_threaded_test_pending(struct dmatest_info *info)
252 {
253 struct dmatest_chan *dtc;
254
255 list_for_each_entry(dtc, &info->channels, node) {
256 struct dmatest_thread *thread;
257
258 list_for_each_entry(thread, &dtc->threads, node) {
259 if (thread->pending)
260 return true;
261 }
262 }
263
264 return false;
265 }
266
267 static int dmatest_wait_get(char *val, const struct kernel_param *kp)
268 {
269 struct dmatest_info *info = &test_info;
270 struct dmatest_params *params = &info->params;
271
272 if (params->iterations)
273 wait_event(thread_wait, !is_threaded_test_run(info));
274 wait = true;
275 return param_get_bool(val, kp);
276 }
277
278 static const struct kernel_param_ops wait_ops = {
279 .get = dmatest_wait_get,
280 .set = param_set_bool,
281 };
282 module_param_cb(wait, &wait_ops, &wait, S_IRUGO);
283 MODULE_PARM_DESC(wait, "Wait for tests to complete (default: false)");
284
285 static bool dmatest_match_channel(struct dmatest_params *params,
286 struct dma_chan *chan)
287 {
288 if (params->channel[0] == '\0')
289 return true;
290 return strcmp(dma_chan_name(chan), params->channel) == 0;
291 }
292
293 static bool dmatest_match_device(struct dmatest_params *params,
294 struct dma_device *device)
295 {
296 if (params->device[0] == '\0')
297 return true;
298 return strcmp(dev_name(device->dev), params->device) == 0;
299 }
300
301 static unsigned long dmatest_random(void)
302 {
303 unsigned long buf;
304
305 prandom_bytes(&buf, sizeof(buf));
306 return buf;
307 }
308
309 static inline u8 gen_inv_idx(u8 index, bool is_memset)
310 {
311 u8 val = is_memset ? PATTERN_MEMSET_IDX : index;
312
313 return ~val & PATTERN_COUNT_MASK;
314 }
315
316 static inline u8 gen_src_value(u8 index, bool is_memset)
317 {
318 return PATTERN_SRC | gen_inv_idx(index, is_memset);
319 }
320
321 static inline u8 gen_dst_value(u8 index, bool is_memset)
322 {
323 return PATTERN_DST | gen_inv_idx(index, is_memset);
324 }
325
326 static void dmatest_init_srcs(u8 **bufs, unsigned int start, unsigned int len,
327 unsigned int buf_size, bool is_memset)
328 {
329 unsigned int i;
330 u8 *buf;
331
332 for (; (buf = *bufs); bufs++) {
333 for (i = 0; i < start; i++)
334 buf[i] = gen_src_value(i, is_memset);
335 for ( ; i < start + len; i++)
336 buf[i] = gen_src_value(i, is_memset) | PATTERN_COPY;
337 for ( ; i < buf_size; i++)
338 buf[i] = gen_src_value(i, is_memset);
339 buf++;
340 }
341 }
342
343 static void dmatest_init_dsts(u8 **bufs, unsigned int start, unsigned int len,
344 unsigned int buf_size, bool is_memset)
345 {
346 unsigned int i;
347 u8 *buf;
348
349 for (; (buf = *bufs); bufs++) {
350 for (i = 0; i < start; i++)
351 buf[i] = gen_dst_value(i, is_memset);
352 for ( ; i < start + len; i++)
353 buf[i] = gen_dst_value(i, is_memset) |
354 PATTERN_OVERWRITE;
355 for ( ; i < buf_size; i++)
356 buf[i] = gen_dst_value(i, is_memset);
357 }
358 }
359
360 static void dmatest_mismatch(u8 actual, u8 pattern, unsigned int index,
361 unsigned int counter, bool is_srcbuf, bool is_memset)
362 {
363 u8 diff = actual ^ pattern;
364 u8 expected = pattern | gen_inv_idx(counter, is_memset);
365 const char *thread_name = current->comm;
366
367 if (is_srcbuf)
368 pr_warn("%s: srcbuf[0x%x] overwritten! Expected %02x, got %02x\n",
369 thread_name, index, expected, actual);
370 else if ((pattern & PATTERN_COPY)
371 && (diff & (PATTERN_COPY | PATTERN_OVERWRITE)))
372 pr_warn("%s: dstbuf[0x%x] not copied! Expected %02x, got %02x\n",
373 thread_name, index, expected, actual);
374 else if (diff & PATTERN_SRC)
375 pr_warn("%s: dstbuf[0x%x] was copied! Expected %02x, got %02x\n",
376 thread_name, index, expected, actual);
377 else
378 pr_warn("%s: dstbuf[0x%x] mismatch! Expected %02x, got %02x\n",
379 thread_name, index, expected, actual);
380 }
381
382 static unsigned int dmatest_verify(u8 **bufs, unsigned int start,
383 unsigned int end, unsigned int counter, u8 pattern,
384 bool is_srcbuf, bool is_memset)
385 {
386 unsigned int i;
387 unsigned int error_count = 0;
388 u8 actual;
389 u8 expected;
390 u8 *buf;
391 unsigned int counter_orig = counter;
392
393 for (; (buf = *bufs); bufs++) {
394 counter = counter_orig;
395 for (i = start; i < end; i++) {
396 actual = buf[i];
397 expected = pattern | gen_inv_idx(counter, is_memset);
398 if (actual != expected) {
399 if (error_count < MAX_ERROR_COUNT)
400 dmatest_mismatch(actual, pattern, i,
401 counter, is_srcbuf,
402 is_memset);
403 error_count++;
404 }
405 counter++;
406 }
407 }
408
409 if (error_count > MAX_ERROR_COUNT)
410 pr_warn("%s: %u errors suppressed\n",
411 current->comm, error_count - MAX_ERROR_COUNT);
412
413 return error_count;
414 }
415
416
417 static void dmatest_callback(void *arg)
418 {
419 struct dmatest_done *done = arg;
420 struct dmatest_thread *thread =
421 container_of(done, struct dmatest_thread, test_done);
422 if (!thread->done) {
423 done->done = true;
424 wake_up_all(done->wait);
425 } else {
426
427
428
429
430
431
432
433 WARN(1, "dmatest: Kernel memory may be corrupted!!\n");
434 }
435 }
436
437 static unsigned int min_odd(unsigned int x, unsigned int y)
438 {
439 unsigned int val = min(x, y);
440
441 return val % 2 ? val : val - 1;
442 }
443
444 static void result(const char *err, unsigned int n, unsigned int src_off,
445 unsigned int dst_off, unsigned int len, unsigned long data)
446 {
447 pr_info("%s: result #%u: '%s' with src_off=0x%x dst_off=0x%x len=0x%x (%lu)\n",
448 current->comm, n, err, src_off, dst_off, len, data);
449 }
450
451 static void dbg_result(const char *err, unsigned int n, unsigned int src_off,
452 unsigned int dst_off, unsigned int len,
453 unsigned long data)
454 {
455 pr_debug("%s: result #%u: '%s' with src_off=0x%x dst_off=0x%x len=0x%x (%lu)\n",
456 current->comm, n, err, src_off, dst_off, len, data);
457 }
458
459 #define verbose_result(err, n, src_off, dst_off, len, data) ({ \
460 if (verbose) \
461 result(err, n, src_off, dst_off, len, data); \
462 else \
463 dbg_result(err, n, src_off, dst_off, len, data);\
464 })
465
466 static unsigned long long dmatest_persec(s64 runtime, unsigned int val)
467 {
468 unsigned long long per_sec = 1000000;
469
470 if (runtime <= 0)
471 return 0;
472
473
474 while (runtime > UINT_MAX) {
475 runtime >>= 1;
476 per_sec <<= 1;
477 }
478
479 per_sec *= val;
480 per_sec = INT_TO_FIXPT(per_sec);
481 do_div(per_sec, runtime);
482
483 return per_sec;
484 }
485
486 static unsigned long long dmatest_KBs(s64 runtime, unsigned long long len)
487 {
488 return FIXPT_TO_INT(dmatest_persec(runtime, len >> 10));
489 }
490
491 static void __dmatest_free_test_data(struct dmatest_data *d, unsigned int cnt)
492 {
493 unsigned int i;
494
495 for (i = 0; i < cnt; i++)
496 kfree(d->raw[i]);
497
498 kfree(d->aligned);
499 kfree(d->raw);
500 }
501
502 static void dmatest_free_test_data(struct dmatest_data *d)
503 {
504 __dmatest_free_test_data(d, d->cnt);
505 }
506
507 static int dmatest_alloc_test_data(struct dmatest_data *d,
508 unsigned int buf_size, u8 align)
509 {
510 unsigned int i = 0;
511
512 d->raw = kcalloc(d->cnt + 1, sizeof(u8 *), GFP_KERNEL);
513 if (!d->raw)
514 return -ENOMEM;
515
516 d->aligned = kcalloc(d->cnt + 1, sizeof(u8 *), GFP_KERNEL);
517 if (!d->aligned)
518 goto err;
519
520 for (i = 0; i < d->cnt; i++) {
521 d->raw[i] = kmalloc(buf_size + align, GFP_KERNEL);
522 if (!d->raw[i])
523 goto err;
524
525
526 if (align)
527 d->aligned[i] = PTR_ALIGN(d->raw[i], align);
528 else
529 d->aligned[i] = d->raw[i];
530 }
531
532 return 0;
533 err:
534 __dmatest_free_test_data(d, i);
535 return -ENOMEM;
536 }
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552 static int dmatest_func(void *data)
553 {
554 struct dmatest_thread *thread = data;
555 struct dmatest_done *done = &thread->test_done;
556 struct dmatest_info *info;
557 struct dmatest_params *params;
558 struct dma_chan *chan;
559 struct dma_device *dev;
560 unsigned int error_count;
561 unsigned int failed_tests = 0;
562 unsigned int total_tests = 0;
563 dma_cookie_t cookie;
564 enum dma_status status;
565 enum dma_ctrl_flags flags;
566 u8 *pq_coefs = NULL;
567 int ret;
568 unsigned int buf_size;
569 struct dmatest_data *src;
570 struct dmatest_data *dst;
571 int i;
572 ktime_t ktime, start, diff;
573 ktime_t filltime = 0;
574 ktime_t comparetime = 0;
575 s64 runtime = 0;
576 unsigned long long total_len = 0;
577 unsigned long long iops = 0;
578 u8 align = 0;
579 bool is_memset = false;
580 dma_addr_t *srcs;
581 dma_addr_t *dma_pq;
582
583 set_freezable();
584
585 ret = -ENOMEM;
586
587 smp_rmb();
588 thread->pending = false;
589 info = thread->info;
590 params = &info->params;
591 chan = thread->chan;
592 dev = chan->device;
593 src = &thread->src;
594 dst = &thread->dst;
595 if (thread->type == DMA_MEMCPY) {
596 align = params->alignment < 0 ? dev->copy_align :
597 params->alignment;
598 src->cnt = dst->cnt = 1;
599 } else if (thread->type == DMA_MEMSET) {
600 align = params->alignment < 0 ? dev->fill_align :
601 params->alignment;
602 src->cnt = dst->cnt = 1;
603 is_memset = true;
604 } else if (thread->type == DMA_XOR) {
605
606 src->cnt = min_odd(params->xor_sources | 1, dev->max_xor);
607 dst->cnt = 1;
608 align = params->alignment < 0 ? dev->xor_align :
609 params->alignment;
610 } else if (thread->type == DMA_PQ) {
611
612 src->cnt = min_odd(params->pq_sources | 1, dma_maxpq(dev, 0));
613 dst->cnt = 2;
614 align = params->alignment < 0 ? dev->pq_align :
615 params->alignment;
616
617 pq_coefs = kmalloc(params->pq_sources + 1, GFP_KERNEL);
618 if (!pq_coefs)
619 goto err_thread_type;
620
621 for (i = 0; i < src->cnt; i++)
622 pq_coefs[i] = 1;
623 } else
624 goto err_thread_type;
625
626
627 if ((src->cnt + dst->cnt) >= 255) {
628 pr_err("too many buffers (%d of 255 supported)\n",
629 src->cnt + dst->cnt);
630 goto err_free_coefs;
631 }
632
633 buf_size = params->buf_size;
634 if (1 << align > buf_size) {
635 pr_err("%u-byte buffer too small for %d-byte alignment\n",
636 buf_size, 1 << align);
637 goto err_free_coefs;
638 }
639
640 if (dmatest_alloc_test_data(src, buf_size, align) < 0)
641 goto err_free_coefs;
642
643 if (dmatest_alloc_test_data(dst, buf_size, align) < 0)
644 goto err_src;
645
646 set_user_nice(current, 10);
647
648 srcs = kcalloc(src->cnt, sizeof(dma_addr_t), GFP_KERNEL);
649 if (!srcs)
650 goto err_dst;
651
652 dma_pq = kcalloc(dst->cnt, sizeof(dma_addr_t), GFP_KERNEL);
653 if (!dma_pq)
654 goto err_srcs_array;
655
656
657
658
659 if (params->polled)
660 flags = DMA_CTRL_ACK;
661 else
662 flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT;
663
664 ktime = ktime_get();
665 while (!(kthread_should_stop() ||
666 (params->iterations && total_tests >= params->iterations))) {
667 struct dma_async_tx_descriptor *tx = NULL;
668 struct dmaengine_unmap_data *um;
669 dma_addr_t *dsts;
670 unsigned int len;
671
672 total_tests++;
673
674 if (params->transfer_size) {
675 if (params->transfer_size >= buf_size) {
676 pr_err("%u-byte transfer size must be lower than %u-buffer size\n",
677 params->transfer_size, buf_size);
678 break;
679 }
680 len = params->transfer_size;
681 } else if (params->norandom) {
682 len = buf_size;
683 } else {
684 len = dmatest_random() % buf_size + 1;
685 }
686
687
688 if (!params->transfer_size) {
689 len = (len >> align) << align;
690 if (!len)
691 len = 1 << align;
692 }
693 total_len += len;
694
695 if (params->norandom) {
696 src->off = 0;
697 dst->off = 0;
698 } else {
699 src->off = dmatest_random() % (buf_size - len + 1);
700 dst->off = dmatest_random() % (buf_size - len + 1);
701
702 src->off = (src->off >> align) << align;
703 dst->off = (dst->off >> align) << align;
704 }
705
706 if (!params->noverify) {
707 start = ktime_get();
708 dmatest_init_srcs(src->aligned, src->off, len,
709 buf_size, is_memset);
710 dmatest_init_dsts(dst->aligned, dst->off, len,
711 buf_size, is_memset);
712
713 diff = ktime_sub(ktime_get(), start);
714 filltime = ktime_add(filltime, diff);
715 }
716
717 um = dmaengine_get_unmap_data(dev->dev, src->cnt + dst->cnt,
718 GFP_KERNEL);
719 if (!um) {
720 failed_tests++;
721 result("unmap data NULL", total_tests,
722 src->off, dst->off, len, ret);
723 continue;
724 }
725
726 um->len = buf_size;
727 for (i = 0; i < src->cnt; i++) {
728 void *buf = src->aligned[i];
729 struct page *pg = virt_to_page(buf);
730 unsigned long pg_off = offset_in_page(buf);
731
732 um->addr[i] = dma_map_page(dev->dev, pg, pg_off,
733 um->len, DMA_TO_DEVICE);
734 srcs[i] = um->addr[i] + src->off;
735 ret = dma_mapping_error(dev->dev, um->addr[i]);
736 if (ret) {
737 result("src mapping error", total_tests,
738 src->off, dst->off, len, ret);
739 goto error_unmap_continue;
740 }
741 um->to_cnt++;
742 }
743
744 dsts = &um->addr[src->cnt];
745 for (i = 0; i < dst->cnt; i++) {
746 void *buf = dst->aligned[i];
747 struct page *pg = virt_to_page(buf);
748 unsigned long pg_off = offset_in_page(buf);
749
750 dsts[i] = dma_map_page(dev->dev, pg, pg_off, um->len,
751 DMA_BIDIRECTIONAL);
752 ret = dma_mapping_error(dev->dev, dsts[i]);
753 if (ret) {
754 result("dst mapping error", total_tests,
755 src->off, dst->off, len, ret);
756 goto error_unmap_continue;
757 }
758 um->bidi_cnt++;
759 }
760
761 if (thread->type == DMA_MEMCPY)
762 tx = dev->device_prep_dma_memcpy(chan,
763 dsts[0] + dst->off,
764 srcs[0], len, flags);
765 else if (thread->type == DMA_MEMSET)
766 tx = dev->device_prep_dma_memset(chan,
767 dsts[0] + dst->off,
768 *(src->aligned[0] + src->off),
769 len, flags);
770 else if (thread->type == DMA_XOR)
771 tx = dev->device_prep_dma_xor(chan,
772 dsts[0] + dst->off,
773 srcs, src->cnt,
774 len, flags);
775 else if (thread->type == DMA_PQ) {
776 for (i = 0; i < dst->cnt; i++)
777 dma_pq[i] = dsts[i] + dst->off;
778 tx = dev->device_prep_dma_pq(chan, dma_pq, srcs,
779 src->cnt, pq_coefs,
780 len, flags);
781 }
782
783 if (!tx) {
784 result("prep error", total_tests, src->off,
785 dst->off, len, ret);
786 msleep(100);
787 goto error_unmap_continue;
788 }
789
790 done->done = false;
791 if (!params->polled) {
792 tx->callback = dmatest_callback;
793 tx->callback_param = done;
794 }
795 cookie = tx->tx_submit(tx);
796
797 if (dma_submit_error(cookie)) {
798 result("submit error", total_tests, src->off,
799 dst->off, len, ret);
800 msleep(100);
801 goto error_unmap_continue;
802 }
803
804 if (params->polled) {
805 status = dma_sync_wait(chan, cookie);
806 dmaengine_terminate_sync(chan);
807 if (status == DMA_COMPLETE)
808 done->done = true;
809 } else {
810 dma_async_issue_pending(chan);
811
812 wait_event_freezable_timeout(thread->done_wait,
813 done->done,
814 msecs_to_jiffies(params->timeout));
815
816 status = dma_async_is_tx_complete(chan, cookie, NULL,
817 NULL);
818 }
819
820 if (!done->done) {
821 result("test timed out", total_tests, src->off, dst->off,
822 len, 0);
823 goto error_unmap_continue;
824 } else if (status != DMA_COMPLETE) {
825 result(status == DMA_ERROR ?
826 "completion error status" :
827 "completion busy status", total_tests, src->off,
828 dst->off, len, ret);
829 goto error_unmap_continue;
830 }
831
832 dmaengine_unmap_put(um);
833
834 if (params->noverify) {
835 verbose_result("test passed", total_tests, src->off,
836 dst->off, len, 0);
837 continue;
838 }
839
840 start = ktime_get();
841 pr_debug("%s: verifying source buffer...\n", current->comm);
842 error_count = dmatest_verify(src->aligned, 0, src->off,
843 0, PATTERN_SRC, true, is_memset);
844 error_count += dmatest_verify(src->aligned, src->off,
845 src->off + len, src->off,
846 PATTERN_SRC | PATTERN_COPY, true, is_memset);
847 error_count += dmatest_verify(src->aligned, src->off + len,
848 buf_size, src->off + len,
849 PATTERN_SRC, true, is_memset);
850
851 pr_debug("%s: verifying dest buffer...\n", current->comm);
852 error_count += dmatest_verify(dst->aligned, 0, dst->off,
853 0, PATTERN_DST, false, is_memset);
854
855 error_count += dmatest_verify(dst->aligned, dst->off,
856 dst->off + len, src->off,
857 PATTERN_SRC | PATTERN_COPY, false, is_memset);
858
859 error_count += dmatest_verify(dst->aligned, dst->off + len,
860 buf_size, dst->off + len,
861 PATTERN_DST, false, is_memset);
862
863 diff = ktime_sub(ktime_get(), start);
864 comparetime = ktime_add(comparetime, diff);
865
866 if (error_count) {
867 result("data error", total_tests, src->off, dst->off,
868 len, error_count);
869 failed_tests++;
870 } else {
871 verbose_result("test passed", total_tests, src->off,
872 dst->off, len, 0);
873 }
874
875 continue;
876
877 error_unmap_continue:
878 dmaengine_unmap_put(um);
879 failed_tests++;
880 }
881 ktime = ktime_sub(ktime_get(), ktime);
882 ktime = ktime_sub(ktime, comparetime);
883 ktime = ktime_sub(ktime, filltime);
884 runtime = ktime_to_us(ktime);
885
886 ret = 0;
887 kfree(dma_pq);
888 err_srcs_array:
889 kfree(srcs);
890 err_dst:
891 dmatest_free_test_data(dst);
892 err_src:
893 dmatest_free_test_data(src);
894 err_free_coefs:
895 kfree(pq_coefs);
896 err_thread_type:
897 iops = dmatest_persec(runtime, total_tests);
898 pr_info("%s: summary %u tests, %u failures %llu.%02llu iops %llu KB/s (%d)\n",
899 current->comm, total_tests, failed_tests,
900 FIXPT_TO_INT(iops), FIXPT_GET_FRAC(iops),
901 dmatest_KBs(runtime, total_len), ret);
902
903
904 if (ret || failed_tests)
905 dmaengine_terminate_sync(chan);
906
907 thread->done = true;
908 wake_up(&thread_wait);
909
910 return ret;
911 }
912
913 static void dmatest_cleanup_channel(struct dmatest_chan *dtc)
914 {
915 struct dmatest_thread *thread;
916 struct dmatest_thread *_thread;
917 int ret;
918
919 list_for_each_entry_safe(thread, _thread, &dtc->threads, node) {
920 ret = kthread_stop(thread->task);
921 pr_debug("thread %s exited with status %d\n",
922 thread->task->comm, ret);
923 list_del(&thread->node);
924 put_task_struct(thread->task);
925 kfree(thread);
926 }
927
928
929 dmaengine_terminate_sync(dtc->chan);
930
931 kfree(dtc);
932 }
933
934 static int dmatest_add_threads(struct dmatest_info *info,
935 struct dmatest_chan *dtc, enum dma_transaction_type type)
936 {
937 struct dmatest_params *params = &info->params;
938 struct dmatest_thread *thread;
939 struct dma_chan *chan = dtc->chan;
940 char *op;
941 unsigned int i;
942
943 if (type == DMA_MEMCPY)
944 op = "copy";
945 else if (type == DMA_MEMSET)
946 op = "set";
947 else if (type == DMA_XOR)
948 op = "xor";
949 else if (type == DMA_PQ)
950 op = "pq";
951 else
952 return -EINVAL;
953
954 for (i = 0; i < params->threads_per_chan; i++) {
955 thread = kzalloc(sizeof(struct dmatest_thread), GFP_KERNEL);
956 if (!thread) {
957 pr_warn("No memory for %s-%s%u\n",
958 dma_chan_name(chan), op, i);
959 break;
960 }
961 thread->info = info;
962 thread->chan = dtc->chan;
963 thread->type = type;
964 thread->test_done.wait = &thread->done_wait;
965 init_waitqueue_head(&thread->done_wait);
966 smp_wmb();
967 thread->task = kthread_create(dmatest_func, thread, "%s-%s%u",
968 dma_chan_name(chan), op, i);
969 if (IS_ERR(thread->task)) {
970 pr_warn("Failed to create thread %s-%s%u\n",
971 dma_chan_name(chan), op, i);
972 kfree(thread);
973 break;
974 }
975
976
977 get_task_struct(thread->task);
978 list_add_tail(&thread->node, &dtc->threads);
979 thread->pending = true;
980 }
981
982 return i;
983 }
984
985 static int dmatest_add_channel(struct dmatest_info *info,
986 struct dma_chan *chan)
987 {
988 struct dmatest_chan *dtc;
989 struct dma_device *dma_dev = chan->device;
990 unsigned int thread_count = 0;
991 int cnt;
992
993 dtc = kmalloc(sizeof(struct dmatest_chan), GFP_KERNEL);
994 if (!dtc) {
995 pr_warn("No memory for %s\n", dma_chan_name(chan));
996 return -ENOMEM;
997 }
998
999 dtc->chan = chan;
1000 INIT_LIST_HEAD(&dtc->threads);
1001
1002 if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) {
1003 if (dmatest == 0) {
1004 cnt = dmatest_add_threads(info, dtc, DMA_MEMCPY);
1005 thread_count += cnt > 0 ? cnt : 0;
1006 }
1007 }
1008
1009 if (dma_has_cap(DMA_MEMSET, dma_dev->cap_mask)) {
1010 if (dmatest == 1) {
1011 cnt = dmatest_add_threads(info, dtc, DMA_MEMSET);
1012 thread_count += cnt > 0 ? cnt : 0;
1013 }
1014 }
1015
1016 if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) {
1017 cnt = dmatest_add_threads(info, dtc, DMA_XOR);
1018 thread_count += cnt > 0 ? cnt : 0;
1019 }
1020 if (dma_has_cap(DMA_PQ, dma_dev->cap_mask)) {
1021 cnt = dmatest_add_threads(info, dtc, DMA_PQ);
1022 thread_count += cnt > 0 ? cnt : 0;
1023 }
1024
1025 pr_info("Added %u threads using %s\n",
1026 thread_count, dma_chan_name(chan));
1027
1028 list_add_tail(&dtc->node, &info->channels);
1029 info->nr_channels++;
1030
1031 return 0;
1032 }
1033
1034 static bool filter(struct dma_chan *chan, void *param)
1035 {
1036 struct dmatest_params *params = param;
1037
1038 if (!dmatest_match_channel(params, chan) ||
1039 !dmatest_match_device(params, chan->device))
1040 return false;
1041 else
1042 return true;
1043 }
1044
1045 static void request_channels(struct dmatest_info *info,
1046 enum dma_transaction_type type)
1047 {
1048 dma_cap_mask_t mask;
1049
1050 dma_cap_zero(mask);
1051 dma_cap_set(type, mask);
1052 for (;;) {
1053 struct dmatest_params *params = &info->params;
1054 struct dma_chan *chan;
1055
1056 chan = dma_request_channel(mask, filter, params);
1057 if (chan) {
1058 if (dmatest_add_channel(info, chan)) {
1059 dma_release_channel(chan);
1060 break;
1061 }
1062 } else
1063 break;
1064 if (params->max_channels &&
1065 info->nr_channels >= params->max_channels)
1066 break;
1067 }
1068 }
1069
1070 static void add_threaded_test(struct dmatest_info *info)
1071 {
1072 struct dmatest_params *params = &info->params;
1073
1074
1075 params->buf_size = test_buf_size;
1076 strlcpy(params->channel, strim(test_channel), sizeof(params->channel));
1077 strlcpy(params->device, strim(test_device), sizeof(params->device));
1078 params->threads_per_chan = threads_per_chan;
1079 params->max_channels = max_channels;
1080 params->iterations = iterations;
1081 params->xor_sources = xor_sources;
1082 params->pq_sources = pq_sources;
1083 params->timeout = timeout;
1084 params->noverify = noverify;
1085 params->norandom = norandom;
1086 params->alignment = alignment;
1087 params->transfer_size = transfer_size;
1088 params->polled = polled;
1089
1090 request_channels(info, DMA_MEMCPY);
1091 request_channels(info, DMA_MEMSET);
1092 request_channels(info, DMA_XOR);
1093 request_channels(info, DMA_PQ);
1094 }
1095
1096 static void run_pending_tests(struct dmatest_info *info)
1097 {
1098 struct dmatest_chan *dtc;
1099 unsigned int thread_count = 0;
1100
1101 list_for_each_entry(dtc, &info->channels, node) {
1102 struct dmatest_thread *thread;
1103
1104 thread_count = 0;
1105 list_for_each_entry(thread, &dtc->threads, node) {
1106 wake_up_process(thread->task);
1107 thread_count++;
1108 }
1109 pr_info("Started %u threads using %s\n",
1110 thread_count, dma_chan_name(dtc->chan));
1111 }
1112 }
1113
1114 static void stop_threaded_test(struct dmatest_info *info)
1115 {
1116 struct dmatest_chan *dtc, *_dtc;
1117 struct dma_chan *chan;
1118
1119 list_for_each_entry_safe(dtc, _dtc, &info->channels, node) {
1120 list_del(&dtc->node);
1121 chan = dtc->chan;
1122 dmatest_cleanup_channel(dtc);
1123 pr_debug("dropped channel %s\n", dma_chan_name(chan));
1124 dma_release_channel(chan);
1125 }
1126
1127 info->nr_channels = 0;
1128 }
1129
1130 static void start_threaded_tests(struct dmatest_info *info)
1131 {
1132
1133
1134
1135 if (!info->did_init)
1136 return;
1137
1138 run_pending_tests(info);
1139 }
1140
1141 static int dmatest_run_get(char *val, const struct kernel_param *kp)
1142 {
1143 struct dmatest_info *info = &test_info;
1144
1145 mutex_lock(&info->lock);
1146 if (is_threaded_test_run(info)) {
1147 dmatest_run = true;
1148 } else {
1149 if (!is_threaded_test_pending(info))
1150 stop_threaded_test(info);
1151 dmatest_run = false;
1152 }
1153 mutex_unlock(&info->lock);
1154
1155 return param_get_bool(val, kp);
1156 }
1157
1158 static int dmatest_run_set(const char *val, const struct kernel_param *kp)
1159 {
1160 struct dmatest_info *info = &test_info;
1161 int ret;
1162
1163 mutex_lock(&info->lock);
1164 ret = param_set_bool(val, kp);
1165 if (ret) {
1166 mutex_unlock(&info->lock);
1167 return ret;
1168 } else if (dmatest_run) {
1169 if (!is_threaded_test_pending(info)) {
1170 pr_info("No channels configured, continue with any\n");
1171 add_threaded_test(info);
1172 }
1173 start_threaded_tests(info);
1174 } else {
1175 stop_threaded_test(info);
1176 }
1177
1178 mutex_unlock(&info->lock);
1179
1180 return ret;
1181 }
1182
1183 static int dmatest_chan_set(const char *val, const struct kernel_param *kp)
1184 {
1185 struct dmatest_info *info = &test_info;
1186 struct dmatest_chan *dtc;
1187 char chan_reset_val[20];
1188 int ret = 0;
1189
1190 mutex_lock(&info->lock);
1191 ret = param_set_copystring(val, kp);
1192 if (ret) {
1193 mutex_unlock(&info->lock);
1194 return ret;
1195 }
1196
1197 if (!is_threaded_test_run(info) && !is_threaded_test_pending(info))
1198 stop_threaded_test(info);
1199
1200 if (is_threaded_test_pending(info)) {
1201 list_for_each_entry(dtc, &info->channels, node) {
1202 if (strcmp(dma_chan_name(dtc->chan),
1203 strim(test_channel)) == 0) {
1204 dtc = list_last_entry(&info->channels,
1205 struct dmatest_chan,
1206 node);
1207 strlcpy(chan_reset_val,
1208 dma_chan_name(dtc->chan),
1209 sizeof(chan_reset_val));
1210 ret = -EBUSY;
1211 goto add_chan_err;
1212 }
1213 }
1214 }
1215
1216 add_threaded_test(info);
1217
1218
1219 dtc = list_last_entry(&info->channels, struct dmatest_chan, node);
1220
1221 if (dtc->chan) {
1222
1223
1224
1225
1226
1227
1228 if ((strcmp(dma_chan_name(dtc->chan), strim(test_channel)) != 0)
1229 && (strcmp("", strim(test_channel)) != 0)) {
1230 ret = -EINVAL;
1231 strlcpy(chan_reset_val, dma_chan_name(dtc->chan),
1232 sizeof(chan_reset_val));
1233 goto add_chan_err;
1234 }
1235
1236 } else {
1237
1238 strlcpy(chan_reset_val, "", sizeof(chan_reset_val));
1239 ret = -EBUSY;
1240 goto add_chan_err;
1241 }
1242
1243 mutex_unlock(&info->lock);
1244
1245 return ret;
1246
1247 add_chan_err:
1248 param_set_copystring(chan_reset_val, kp);
1249 mutex_unlock(&info->lock);
1250
1251 return ret;
1252 }
1253
1254 static int dmatest_chan_get(char *val, const struct kernel_param *kp)
1255 {
1256 struct dmatest_info *info = &test_info;
1257
1258 mutex_lock(&info->lock);
1259 if (!is_threaded_test_run(info) && !is_threaded_test_pending(info)) {
1260 stop_threaded_test(info);
1261 strlcpy(test_channel, "", sizeof(test_channel));
1262 }
1263 mutex_unlock(&info->lock);
1264
1265 return param_get_string(val, kp);
1266 }
1267
1268 static int dmatest_test_list_get(char *val, const struct kernel_param *kp)
1269 {
1270 struct dmatest_info *info = &test_info;
1271 struct dmatest_chan *dtc;
1272 unsigned int thread_count = 0;
1273
1274 list_for_each_entry(dtc, &info->channels, node) {
1275 struct dmatest_thread *thread;
1276
1277 thread_count = 0;
1278 list_for_each_entry(thread, &dtc->threads, node) {
1279 thread_count++;
1280 }
1281 pr_info("%u threads using %s\n",
1282 thread_count, dma_chan_name(dtc->chan));
1283 }
1284
1285 return 0;
1286 }
1287
1288 static int __init dmatest_init(void)
1289 {
1290 struct dmatest_info *info = &test_info;
1291 struct dmatest_params *params = &info->params;
1292
1293 if (dmatest_run) {
1294 mutex_lock(&info->lock);
1295 add_threaded_test(info);
1296 run_pending_tests(info);
1297 mutex_unlock(&info->lock);
1298 }
1299
1300 if (params->iterations && wait)
1301 wait_event(thread_wait, !is_threaded_test_run(info));
1302
1303
1304
1305
1306 info->did_init = true;
1307
1308 return 0;
1309 }
1310
1311 late_initcall(dmatest_init);
1312
1313 static void __exit dmatest_exit(void)
1314 {
1315 struct dmatest_info *info = &test_info;
1316
1317 mutex_lock(&info->lock);
1318 stop_threaded_test(info);
1319 mutex_unlock(&info->lock);
1320 }
1321 module_exit(dmatest_exit);
1322
1323 MODULE_AUTHOR("Haavard Skinnemoen (Atmel)");
1324 MODULE_LICENSE("GPL v2");