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Commit | Line | Data |
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4a776f0a HS |
1 | /* |
2 | * DMA Engine test module | |
3 | * | |
4 | * Copyright (C) 2007 Atmel Corporation | |
851b7e16 | 5 | * Copyright (C) 2013 Intel Corporation |
4a776f0a HS |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/delay.h> | |
b7f080cf | 12 | #include <linux/dma-mapping.h> |
4a776f0a | 13 | #include <linux/dmaengine.h> |
981ed70d | 14 | #include <linux/freezer.h> |
4a776f0a HS |
15 | #include <linux/init.h> |
16 | #include <linux/kthread.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/moduleparam.h> | |
19 | #include <linux/random.h> | |
5a0e3ad6 | 20 | #include <linux/slab.h> |
4a776f0a | 21 | #include <linux/wait.h> |
851b7e16 AS |
22 | #include <linux/ctype.h> |
23 | #include <linux/debugfs.h> | |
24 | #include <linux/uaccess.h> | |
25 | #include <linux/seq_file.h> | |
4a776f0a HS |
26 | |
27 | static unsigned int test_buf_size = 16384; | |
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 | ||
e03e93a9 AS |
89 | struct dmatest_info; |
90 | ||
4a776f0a HS |
91 | struct dmatest_thread { |
92 | struct list_head node; | |
e03e93a9 | 93 | struct dmatest_info *info; |
4a776f0a HS |
94 | struct task_struct *task; |
95 | struct dma_chan *chan; | |
b54d5cb9 DW |
96 | u8 **srcs; |
97 | u8 **dsts; | |
98 | enum dma_transaction_type type; | |
3e5ccd86 | 99 | bool done; |
4a776f0a HS |
100 | }; |
101 | ||
102 | struct dmatest_chan { | |
103 | struct list_head node; | |
104 | struct dma_chan *chan; | |
105 | struct list_head threads; | |
106 | }; | |
107 | ||
e03e93a9 | 108 | /** |
15b8a8ea | 109 | * struct dmatest_params - test parameters. |
e03e93a9 AS |
110 | * @buf_size: size of the memcpy test buffer |
111 | * @channel: bus ID of the channel to test | |
112 | * @device: bus ID of the DMA Engine to test | |
113 | * @threads_per_chan: number of threads to start per channel | |
114 | * @max_channels: maximum number of channels to use | |
115 | * @iterations: iterations before stopping test | |
116 | * @xor_sources: number of xor source buffers | |
117 | * @pq_sources: number of p+q source buffers | |
118 | * @timeout: transfer timeout in msec, -1 for infinite timeout | |
119 | */ | |
15b8a8ea | 120 | struct dmatest_params { |
e03e93a9 AS |
121 | unsigned int buf_size; |
122 | char channel[20]; | |
123 | char device[20]; | |
124 | unsigned int threads_per_chan; | |
125 | unsigned int max_channels; | |
126 | unsigned int iterations; | |
127 | unsigned int xor_sources; | |
128 | unsigned int pq_sources; | |
129 | int timeout; | |
15b8a8ea AS |
130 | }; |
131 | ||
132 | /** | |
133 | * struct dmatest_info - test information. | |
134 | * @params: test parameters | |
851b7e16 | 135 | * @lock: access protection to the fields of this structure |
15b8a8ea AS |
136 | */ |
137 | struct dmatest_info { | |
138 | /* Test parameters */ | |
139 | struct dmatest_params params; | |
838cc704 AS |
140 | |
141 | /* Internal state */ | |
142 | struct list_head channels; | |
143 | unsigned int nr_channels; | |
851b7e16 AS |
144 | struct mutex lock; |
145 | ||
146 | /* debugfs related stuff */ | |
147 | struct dentry *root; | |
148 | struct dmatest_params dbgfs_params; | |
e03e93a9 AS |
149 | }; |
150 | ||
151 | static struct dmatest_info test_info; | |
152 | ||
15b8a8ea | 153 | static bool dmatest_match_channel(struct dmatest_params *params, |
e03e93a9 | 154 | struct dma_chan *chan) |
4a776f0a | 155 | { |
15b8a8ea | 156 | if (params->channel[0] == '\0') |
4a776f0a | 157 | return true; |
15b8a8ea | 158 | return strcmp(dma_chan_name(chan), params->channel) == 0; |
4a776f0a HS |
159 | } |
160 | ||
15b8a8ea | 161 | static bool dmatest_match_device(struct dmatest_params *params, |
e03e93a9 | 162 | struct dma_device *device) |
4a776f0a | 163 | { |
15b8a8ea | 164 | if (params->device[0] == '\0') |
4a776f0a | 165 | return true; |
15b8a8ea | 166 | return strcmp(dev_name(device->dev), params->device) == 0; |
4a776f0a HS |
167 | } |
168 | ||
169 | static unsigned long dmatest_random(void) | |
170 | { | |
171 | unsigned long buf; | |
172 | ||
173 | get_random_bytes(&buf, sizeof(buf)); | |
174 | return buf; | |
175 | } | |
176 | ||
e03e93a9 AS |
177 | static void dmatest_init_srcs(u8 **bufs, unsigned int start, unsigned int len, |
178 | unsigned int buf_size) | |
4a776f0a HS |
179 | { |
180 | unsigned int i; | |
b54d5cb9 DW |
181 | u8 *buf; |
182 | ||
183 | for (; (buf = *bufs); bufs++) { | |
184 | for (i = 0; i < start; i++) | |
185 | buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK); | |
186 | for ( ; i < start + len; i++) | |
187 | buf[i] = PATTERN_SRC | PATTERN_COPY | |
c019894e | 188 | | (~i & PATTERN_COUNT_MASK); |
e03e93a9 | 189 | for ( ; i < buf_size; i++) |
b54d5cb9 DW |
190 | buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK); |
191 | buf++; | |
192 | } | |
4a776f0a HS |
193 | } |
194 | ||
e03e93a9 AS |
195 | static void dmatest_init_dsts(u8 **bufs, unsigned int start, unsigned int len, |
196 | unsigned int buf_size) | |
4a776f0a HS |
197 | { |
198 | unsigned int i; | |
b54d5cb9 DW |
199 | u8 *buf; |
200 | ||
201 | for (; (buf = *bufs); bufs++) { | |
202 | for (i = 0; i < start; i++) | |
203 | buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK); | |
204 | for ( ; i < start + len; i++) | |
205 | buf[i] = PATTERN_DST | PATTERN_OVERWRITE | |
206 | | (~i & PATTERN_COUNT_MASK); | |
e03e93a9 | 207 | for ( ; i < buf_size; i++) |
b54d5cb9 DW |
208 | buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK); |
209 | } | |
4a776f0a HS |
210 | } |
211 | ||
212 | static void dmatest_mismatch(u8 actual, u8 pattern, unsigned int index, | |
213 | unsigned int counter, bool is_srcbuf) | |
214 | { | |
215 | u8 diff = actual ^ pattern; | |
216 | u8 expected = pattern | (~counter & PATTERN_COUNT_MASK); | |
217 | const char *thread_name = current->comm; | |
218 | ||
219 | if (is_srcbuf) | |
220 | pr_warning("%s: srcbuf[0x%x] overwritten!" | |
221 | " Expected %02x, got %02x\n", | |
222 | thread_name, index, expected, actual); | |
223 | else if ((pattern & PATTERN_COPY) | |
224 | && (diff & (PATTERN_COPY | PATTERN_OVERWRITE))) | |
225 | pr_warning("%s: dstbuf[0x%x] not copied!" | |
226 | " Expected %02x, got %02x\n", | |
227 | thread_name, index, expected, actual); | |
228 | else if (diff & PATTERN_SRC) | |
229 | pr_warning("%s: dstbuf[0x%x] was copied!" | |
230 | " Expected %02x, got %02x\n", | |
231 | thread_name, index, expected, actual); | |
232 | else | |
233 | pr_warning("%s: dstbuf[0x%x] mismatch!" | |
234 | " Expected %02x, got %02x\n", | |
235 | thread_name, index, expected, actual); | |
236 | } | |
237 | ||
b54d5cb9 | 238 | static unsigned int dmatest_verify(u8 **bufs, unsigned int start, |
4a776f0a HS |
239 | unsigned int end, unsigned int counter, u8 pattern, |
240 | bool is_srcbuf) | |
241 | { | |
242 | unsigned int i; | |
243 | unsigned int error_count = 0; | |
244 | u8 actual; | |
b54d5cb9 DW |
245 | u8 expected; |
246 | u8 *buf; | |
247 | unsigned int counter_orig = counter; | |
248 | ||
249 | for (; (buf = *bufs); bufs++) { | |
250 | counter = counter_orig; | |
251 | for (i = start; i < end; i++) { | |
252 | actual = buf[i]; | |
253 | expected = pattern | (~counter & PATTERN_COUNT_MASK); | |
254 | if (actual != expected) { | |
74b5c07a | 255 | if (error_count < MAX_ERROR_COUNT) |
b54d5cb9 DW |
256 | dmatest_mismatch(actual, pattern, i, |
257 | counter, is_srcbuf); | |
258 | error_count++; | |
259 | } | |
260 | counter++; | |
4a776f0a | 261 | } |
4a776f0a HS |
262 | } |
263 | ||
74b5c07a | 264 | if (error_count > MAX_ERROR_COUNT) |
4a776f0a | 265 | pr_warning("%s: %u errors suppressed\n", |
74b5c07a | 266 | current->comm, error_count - MAX_ERROR_COUNT); |
4a776f0a HS |
267 | |
268 | return error_count; | |
269 | } | |
270 | ||
adfa543e TH |
271 | /* poor man's completion - we want to use wait_event_freezable() on it */ |
272 | struct dmatest_done { | |
273 | bool done; | |
274 | wait_queue_head_t *wait; | |
275 | }; | |
276 | ||
277 | static void dmatest_callback(void *arg) | |
e44e0aa3 | 278 | { |
adfa543e TH |
279 | struct dmatest_done *done = arg; |
280 | ||
281 | done->done = true; | |
282 | wake_up_all(done->wait); | |
e44e0aa3 DW |
283 | } |
284 | ||
632fd283 AS |
285 | static inline void unmap_src(struct device *dev, dma_addr_t *addr, size_t len, |
286 | unsigned int count) | |
287 | { | |
288 | while (count--) | |
289 | dma_unmap_single(dev, addr[count], len, DMA_TO_DEVICE); | |
290 | } | |
291 | ||
292 | static inline void unmap_dst(struct device *dev, dma_addr_t *addr, size_t len, | |
293 | unsigned int count) | |
294 | { | |
295 | while (count--) | |
296 | dma_unmap_single(dev, addr[count], len, DMA_BIDIRECTIONAL); | |
297 | } | |
298 | ||
8be9e32b AM |
299 | static unsigned int min_odd(unsigned int x, unsigned int y) |
300 | { | |
301 | unsigned int val = min(x, y); | |
302 | ||
303 | return val % 2 ? val : val - 1; | |
304 | } | |
305 | ||
4a776f0a HS |
306 | /* |
307 | * This function repeatedly tests DMA transfers of various lengths and | |
b54d5cb9 DW |
308 | * offsets for a given operation type until it is told to exit by |
309 | * kthread_stop(). There may be multiple threads running this function | |
310 | * in parallel for a single channel, and there may be multiple channels | |
311 | * being tested in parallel. | |
4a776f0a HS |
312 | * |
313 | * Before each test, the source and destination buffer is initialized | |
314 | * with a known pattern. This pattern is different depending on | |
315 | * whether it's in an area which is supposed to be copied or | |
316 | * overwritten, and different in the source and destination buffers. | |
317 | * So if the DMA engine doesn't copy exactly what we tell it to copy, | |
318 | * we'll notice. | |
319 | */ | |
320 | static int dmatest_func(void *data) | |
321 | { | |
adfa543e | 322 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(done_wait); |
4a776f0a | 323 | struct dmatest_thread *thread = data; |
adfa543e | 324 | struct dmatest_done done = { .wait = &done_wait }; |
e03e93a9 | 325 | struct dmatest_info *info; |
15b8a8ea | 326 | struct dmatest_params *params; |
4a776f0a | 327 | struct dma_chan *chan; |
8be9e32b | 328 | struct dma_device *dev; |
4a776f0a HS |
329 | const char *thread_name; |
330 | unsigned int src_off, dst_off, len; | |
331 | unsigned int error_count; | |
332 | unsigned int failed_tests = 0; | |
333 | unsigned int total_tests = 0; | |
334 | dma_cookie_t cookie; | |
335 | enum dma_status status; | |
b54d5cb9 | 336 | enum dma_ctrl_flags flags; |
945b5af3 | 337 | u8 *pq_coefs = NULL; |
4a776f0a | 338 | int ret; |
b54d5cb9 DW |
339 | int src_cnt; |
340 | int dst_cnt; | |
341 | int i; | |
4a776f0a HS |
342 | |
343 | thread_name = current->comm; | |
adfa543e | 344 | set_freezable(); |
4a776f0a HS |
345 | |
346 | ret = -ENOMEM; | |
4a776f0a HS |
347 | |
348 | smp_rmb(); | |
e03e93a9 | 349 | info = thread->info; |
15b8a8ea | 350 | params = &info->params; |
4a776f0a | 351 | chan = thread->chan; |
8be9e32b | 352 | dev = chan->device; |
b54d5cb9 DW |
353 | if (thread->type == DMA_MEMCPY) |
354 | src_cnt = dst_cnt = 1; | |
355 | else if (thread->type == DMA_XOR) { | |
8be9e32b | 356 | /* force odd to ensure dst = src */ |
15b8a8ea | 357 | src_cnt = min_odd(params->xor_sources | 1, dev->max_xor); |
b54d5cb9 | 358 | dst_cnt = 1; |
58691d64 | 359 | } else if (thread->type == DMA_PQ) { |
8be9e32b | 360 | /* force odd to ensure dst = src */ |
15b8a8ea | 361 | src_cnt = min_odd(params->pq_sources | 1, dma_maxpq(dev, 0)); |
58691d64 | 362 | dst_cnt = 2; |
945b5af3 | 363 | |
15b8a8ea | 364 | pq_coefs = kmalloc(params->pq_sources+1, GFP_KERNEL); |
945b5af3 AS |
365 | if (!pq_coefs) |
366 | goto err_thread_type; | |
367 | ||
94de648d | 368 | for (i = 0; i < src_cnt; i++) |
58691d64 | 369 | pq_coefs[i] = 1; |
b54d5cb9 | 370 | } else |
945b5af3 | 371 | goto err_thread_type; |
b54d5cb9 DW |
372 | |
373 | thread->srcs = kcalloc(src_cnt+1, sizeof(u8 *), GFP_KERNEL); | |
374 | if (!thread->srcs) | |
375 | goto err_srcs; | |
376 | for (i = 0; i < src_cnt; i++) { | |
15b8a8ea | 377 | thread->srcs[i] = kmalloc(params->buf_size, GFP_KERNEL); |
b54d5cb9 DW |
378 | if (!thread->srcs[i]) |
379 | goto err_srcbuf; | |
380 | } | |
381 | thread->srcs[i] = NULL; | |
382 | ||
383 | thread->dsts = kcalloc(dst_cnt+1, sizeof(u8 *), GFP_KERNEL); | |
384 | if (!thread->dsts) | |
385 | goto err_dsts; | |
386 | for (i = 0; i < dst_cnt; i++) { | |
15b8a8ea | 387 | thread->dsts[i] = kmalloc(params->buf_size, GFP_KERNEL); |
b54d5cb9 DW |
388 | if (!thread->dsts[i]) |
389 | goto err_dstbuf; | |
390 | } | |
391 | thread->dsts[i] = NULL; | |
392 | ||
e44e0aa3 DW |
393 | set_user_nice(current, 10); |
394 | ||
b203bd3f IS |
395 | /* |
396 | * src buffers are freed by the DMAEngine code with dma_unmap_single() | |
397 | * dst buffers are freed by ourselves below | |
398 | */ | |
399 | flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT | |
400 | | DMA_COMPL_SKIP_DEST_UNMAP | DMA_COMPL_SRC_UNMAP_SINGLE; | |
4a776f0a | 401 | |
0a2ff57d | 402 | while (!kthread_should_stop() |
15b8a8ea | 403 | && !(params->iterations && total_tests >= params->iterations)) { |
b54d5cb9 DW |
404 | struct dma_async_tx_descriptor *tx = NULL; |
405 | dma_addr_t dma_srcs[src_cnt]; | |
406 | dma_addr_t dma_dsts[dst_cnt]; | |
83544ae9 | 407 | u8 align = 0; |
d86be86e | 408 | |
4a776f0a HS |
409 | total_tests++; |
410 | ||
83544ae9 DW |
411 | /* honor alignment restrictions */ |
412 | if (thread->type == DMA_MEMCPY) | |
413 | align = dev->copy_align; | |
414 | else if (thread->type == DMA_XOR) | |
415 | align = dev->xor_align; | |
416 | else if (thread->type == DMA_PQ) | |
417 | align = dev->pq_align; | |
418 | ||
15b8a8ea | 419 | if (1 << align > params->buf_size) { |
cfe4f275 | 420 | pr_err("%u-byte buffer too small for %d-byte alignment\n", |
15b8a8ea | 421 | params->buf_size, 1 << align); |
cfe4f275 GL |
422 | break; |
423 | } | |
424 | ||
15b8a8ea | 425 | len = dmatest_random() % params->buf_size + 1; |
83544ae9 | 426 | len = (len >> align) << align; |
cfe4f275 GL |
427 | if (!len) |
428 | len = 1 << align; | |
15b8a8ea AS |
429 | src_off = dmatest_random() % (params->buf_size - len + 1); |
430 | dst_off = dmatest_random() % (params->buf_size - len + 1); | |
cfe4f275 | 431 | |
83544ae9 DW |
432 | src_off = (src_off >> align) << align; |
433 | dst_off = (dst_off >> align) << align; | |
434 | ||
15b8a8ea AS |
435 | dmatest_init_srcs(thread->srcs, src_off, len, params->buf_size); |
436 | dmatest_init_dsts(thread->dsts, dst_off, len, params->buf_size); | |
4a776f0a | 437 | |
b54d5cb9 DW |
438 | for (i = 0; i < src_cnt; i++) { |
439 | u8 *buf = thread->srcs[i] + src_off; | |
440 | ||
441 | dma_srcs[i] = dma_map_single(dev->dev, buf, len, | |
442 | DMA_TO_DEVICE); | |
afde3be1 AS |
443 | ret = dma_mapping_error(dev->dev, dma_srcs[i]); |
444 | if (ret) { | |
445 | unmap_src(dev->dev, dma_srcs, len, i); | |
446 | pr_warn("%s: #%u: mapping error %d with " | |
447 | "src_off=0x%x len=0x%x\n", | |
448 | thread_name, total_tests - 1, ret, | |
449 | src_off, len); | |
450 | failed_tests++; | |
451 | continue; | |
452 | } | |
b54d5cb9 | 453 | } |
d86be86e | 454 | /* map with DMA_BIDIRECTIONAL to force writeback/invalidate */ |
b54d5cb9 DW |
455 | for (i = 0; i < dst_cnt; i++) { |
456 | dma_dsts[i] = dma_map_single(dev->dev, thread->dsts[i], | |
15b8a8ea | 457 | params->buf_size, |
b54d5cb9 | 458 | DMA_BIDIRECTIONAL); |
afde3be1 AS |
459 | ret = dma_mapping_error(dev->dev, dma_dsts[i]); |
460 | if (ret) { | |
461 | unmap_src(dev->dev, dma_srcs, len, src_cnt); | |
15b8a8ea AS |
462 | unmap_dst(dev->dev, dma_dsts, params->buf_size, |
463 | i); | |
afde3be1 AS |
464 | pr_warn("%s: #%u: mapping error %d with " |
465 | "dst_off=0x%x len=0x%x\n", | |
466 | thread_name, total_tests - 1, ret, | |
15b8a8ea | 467 | dst_off, params->buf_size); |
afde3be1 AS |
468 | failed_tests++; |
469 | continue; | |
470 | } | |
b54d5cb9 DW |
471 | } |
472 | ||
473 | if (thread->type == DMA_MEMCPY) | |
474 | tx = dev->device_prep_dma_memcpy(chan, | |
475 | dma_dsts[0] + dst_off, | |
476 | dma_srcs[0], len, | |
477 | flags); | |
478 | else if (thread->type == DMA_XOR) | |
479 | tx = dev->device_prep_dma_xor(chan, | |
480 | dma_dsts[0] + dst_off, | |
67b9124f | 481 | dma_srcs, src_cnt, |
b54d5cb9 | 482 | len, flags); |
58691d64 DW |
483 | else if (thread->type == DMA_PQ) { |
484 | dma_addr_t dma_pq[dst_cnt]; | |
485 | ||
486 | for (i = 0; i < dst_cnt; i++) | |
487 | dma_pq[i] = dma_dsts[i] + dst_off; | |
488 | tx = dev->device_prep_dma_pq(chan, dma_pq, dma_srcs, | |
94de648d | 489 | src_cnt, pq_coefs, |
58691d64 DW |
490 | len, flags); |
491 | } | |
d86be86e | 492 | |
d86be86e | 493 | if (!tx) { |
632fd283 | 494 | unmap_src(dev->dev, dma_srcs, len, src_cnt); |
15b8a8ea AS |
495 | unmap_dst(dev->dev, dma_dsts, params->buf_size, |
496 | dst_cnt); | |
d86be86e AN |
497 | pr_warning("%s: #%u: prep error with src_off=0x%x " |
498 | "dst_off=0x%x len=0x%x\n", | |
499 | thread_name, total_tests - 1, | |
500 | src_off, dst_off, len); | |
501 | msleep(100); | |
502 | failed_tests++; | |
503 | continue; | |
504 | } | |
e44e0aa3 | 505 | |
adfa543e | 506 | done.done = false; |
e44e0aa3 | 507 | tx->callback = dmatest_callback; |
adfa543e | 508 | tx->callback_param = &done; |
d86be86e AN |
509 | cookie = tx->tx_submit(tx); |
510 | ||
4a776f0a HS |
511 | if (dma_submit_error(cookie)) { |
512 | pr_warning("%s: #%u: submit error %d with src_off=0x%x " | |
513 | "dst_off=0x%x len=0x%x\n", | |
514 | thread_name, total_tests - 1, cookie, | |
515 | src_off, dst_off, len); | |
516 | msleep(100); | |
517 | failed_tests++; | |
518 | continue; | |
519 | } | |
b54d5cb9 | 520 | dma_async_issue_pending(chan); |
4a776f0a | 521 | |
77101ce5 AS |
522 | wait_event_freezable_timeout(done_wait, |
523 | done.done || kthread_should_stop(), | |
15b8a8ea | 524 | msecs_to_jiffies(params->timeout)); |
981ed70d | 525 | |
e44e0aa3 | 526 | status = dma_async_is_tx_complete(chan, cookie, NULL, NULL); |
4a776f0a | 527 | |
adfa543e TH |
528 | if (!done.done) { |
529 | /* | |
530 | * We're leaving the timed out dma operation with | |
531 | * dangling pointer to done_wait. To make this | |
532 | * correct, we'll need to allocate wait_done for | |
533 | * each test iteration and perform "who's gonna | |
534 | * free it this time?" dancing. For now, just | |
535 | * leave it dangling. | |
536 | */ | |
e44e0aa3 DW |
537 | pr_warning("%s: #%u: test timed out\n", |
538 | thread_name, total_tests - 1); | |
539 | failed_tests++; | |
540 | continue; | |
541 | } else if (status != DMA_SUCCESS) { | |
542 | pr_warning("%s: #%u: got completion callback," | |
543 | " but status is \'%s\'\n", | |
544 | thread_name, total_tests - 1, | |
545 | status == DMA_ERROR ? "error" : "in progress"); | |
4a776f0a HS |
546 | failed_tests++; |
547 | continue; | |
548 | } | |
e44e0aa3 | 549 | |
d86be86e | 550 | /* Unmap by myself (see DMA_COMPL_SKIP_DEST_UNMAP above) */ |
15b8a8ea | 551 | unmap_dst(dev->dev, dma_dsts, params->buf_size, dst_cnt); |
4a776f0a HS |
552 | |
553 | error_count = 0; | |
554 | ||
555 | pr_debug("%s: verifying source buffer...\n", thread_name); | |
b54d5cb9 | 556 | error_count += dmatest_verify(thread->srcs, 0, src_off, |
4a776f0a | 557 | 0, PATTERN_SRC, true); |
b54d5cb9 | 558 | error_count += dmatest_verify(thread->srcs, src_off, |
4a776f0a HS |
559 | src_off + len, src_off, |
560 | PATTERN_SRC | PATTERN_COPY, true); | |
b54d5cb9 | 561 | error_count += dmatest_verify(thread->srcs, src_off + len, |
15b8a8ea | 562 | params->buf_size, src_off + len, |
4a776f0a HS |
563 | PATTERN_SRC, true); |
564 | ||
565 | pr_debug("%s: verifying dest buffer...\n", | |
566 | thread->task->comm); | |
b54d5cb9 | 567 | error_count += dmatest_verify(thread->dsts, 0, dst_off, |
4a776f0a | 568 | 0, PATTERN_DST, false); |
b54d5cb9 | 569 | error_count += dmatest_verify(thread->dsts, dst_off, |
4a776f0a HS |
570 | dst_off + len, src_off, |
571 | PATTERN_SRC | PATTERN_COPY, false); | |
b54d5cb9 | 572 | error_count += dmatest_verify(thread->dsts, dst_off + len, |
15b8a8ea | 573 | params->buf_size, dst_off + len, |
4a776f0a HS |
574 | PATTERN_DST, false); |
575 | ||
576 | if (error_count) { | |
577 | pr_warning("%s: #%u: %u errors with " | |
578 | "src_off=0x%x dst_off=0x%x len=0x%x\n", | |
579 | thread_name, total_tests - 1, error_count, | |
580 | src_off, dst_off, len); | |
581 | failed_tests++; | |
582 | } else { | |
583 | pr_debug("%s: #%u: No errors with " | |
584 | "src_off=0x%x dst_off=0x%x len=0x%x\n", | |
585 | thread_name, total_tests - 1, | |
586 | src_off, dst_off, len); | |
587 | } | |
588 | } | |
589 | ||
590 | ret = 0; | |
b54d5cb9 DW |
591 | for (i = 0; thread->dsts[i]; i++) |
592 | kfree(thread->dsts[i]); | |
4a776f0a | 593 | err_dstbuf: |
b54d5cb9 DW |
594 | kfree(thread->dsts); |
595 | err_dsts: | |
596 | for (i = 0; thread->srcs[i]; i++) | |
597 | kfree(thread->srcs[i]); | |
4a776f0a | 598 | err_srcbuf: |
b54d5cb9 DW |
599 | kfree(thread->srcs); |
600 | err_srcs: | |
945b5af3 AS |
601 | kfree(pq_coefs); |
602 | err_thread_type: | |
4a776f0a HS |
603 | pr_notice("%s: terminating after %u tests, %u failures (status %d)\n", |
604 | thread_name, total_tests, failed_tests, ret); | |
0a2ff57d | 605 | |
9704efaa | 606 | /* terminate all transfers on specified channels */ |
5e034f7b SH |
607 | if (ret) |
608 | dmaengine_terminate_all(chan); | |
609 | ||
3e5ccd86 AS |
610 | thread->done = true; |
611 | ||
15b8a8ea | 612 | if (params->iterations > 0) |
0a2ff57d | 613 | while (!kthread_should_stop()) { |
b953df7c | 614 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wait_dmatest_exit); |
0a2ff57d NF |
615 | interruptible_sleep_on(&wait_dmatest_exit); |
616 | } | |
617 | ||
4a776f0a HS |
618 | return ret; |
619 | } | |
620 | ||
621 | static void dmatest_cleanup_channel(struct dmatest_chan *dtc) | |
622 | { | |
623 | struct dmatest_thread *thread; | |
624 | struct dmatest_thread *_thread; | |
625 | int ret; | |
626 | ||
627 | list_for_each_entry_safe(thread, _thread, &dtc->threads, node) { | |
628 | ret = kthread_stop(thread->task); | |
629 | pr_debug("dmatest: thread %s exited with status %d\n", | |
630 | thread->task->comm, ret); | |
631 | list_del(&thread->node); | |
632 | kfree(thread); | |
633 | } | |
9704efaa VK |
634 | |
635 | /* terminate all transfers on specified channels */ | |
944ea4dd | 636 | dmaengine_terminate_all(dtc->chan); |
9704efaa | 637 | |
4a776f0a HS |
638 | kfree(dtc); |
639 | } | |
640 | ||
e03e93a9 AS |
641 | static int dmatest_add_threads(struct dmatest_info *info, |
642 | struct dmatest_chan *dtc, enum dma_transaction_type type) | |
4a776f0a | 643 | { |
15b8a8ea | 644 | struct dmatest_params *params = &info->params; |
b54d5cb9 DW |
645 | struct dmatest_thread *thread; |
646 | struct dma_chan *chan = dtc->chan; | |
647 | char *op; | |
648 | unsigned int i; | |
4a776f0a | 649 | |
b54d5cb9 DW |
650 | if (type == DMA_MEMCPY) |
651 | op = "copy"; | |
652 | else if (type == DMA_XOR) | |
653 | op = "xor"; | |
58691d64 DW |
654 | else if (type == DMA_PQ) |
655 | op = "pq"; | |
b54d5cb9 DW |
656 | else |
657 | return -EINVAL; | |
4a776f0a | 658 | |
15b8a8ea | 659 | for (i = 0; i < params->threads_per_chan; i++) { |
4a776f0a HS |
660 | thread = kzalloc(sizeof(struct dmatest_thread), GFP_KERNEL); |
661 | if (!thread) { | |
b54d5cb9 DW |
662 | pr_warning("dmatest: No memory for %s-%s%u\n", |
663 | dma_chan_name(chan), op, i); | |
664 | ||
4a776f0a HS |
665 | break; |
666 | } | |
e03e93a9 | 667 | thread->info = info; |
4a776f0a | 668 | thread->chan = dtc->chan; |
b54d5cb9 | 669 | thread->type = type; |
4a776f0a | 670 | smp_wmb(); |
b54d5cb9 DW |
671 | thread->task = kthread_run(dmatest_func, thread, "%s-%s%u", |
672 | dma_chan_name(chan), op, i); | |
4a776f0a | 673 | if (IS_ERR(thread->task)) { |
b54d5cb9 DW |
674 | pr_warning("dmatest: Failed to run thread %s-%s%u\n", |
675 | dma_chan_name(chan), op, i); | |
4a776f0a HS |
676 | kfree(thread); |
677 | break; | |
678 | } | |
679 | ||
680 | /* srcbuf and dstbuf are allocated by the thread itself */ | |
681 | ||
682 | list_add_tail(&thread->node, &dtc->threads); | |
683 | } | |
684 | ||
b54d5cb9 DW |
685 | return i; |
686 | } | |
687 | ||
e03e93a9 AS |
688 | static int dmatest_add_channel(struct dmatest_info *info, |
689 | struct dma_chan *chan) | |
b54d5cb9 DW |
690 | { |
691 | struct dmatest_chan *dtc; | |
692 | struct dma_device *dma_dev = chan->device; | |
693 | unsigned int thread_count = 0; | |
b9033e68 | 694 | int cnt; |
b54d5cb9 DW |
695 | |
696 | dtc = kmalloc(sizeof(struct dmatest_chan), GFP_KERNEL); | |
697 | if (!dtc) { | |
698 | pr_warning("dmatest: No memory for %s\n", dma_chan_name(chan)); | |
699 | return -ENOMEM; | |
700 | } | |
701 | ||
702 | dtc->chan = chan; | |
703 | INIT_LIST_HEAD(&dtc->threads); | |
704 | ||
705 | if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) { | |
e03e93a9 | 706 | cnt = dmatest_add_threads(info, dtc, DMA_MEMCPY); |
f1aef8b6 | 707 | thread_count += cnt > 0 ? cnt : 0; |
b54d5cb9 DW |
708 | } |
709 | if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) { | |
e03e93a9 | 710 | cnt = dmatest_add_threads(info, dtc, DMA_XOR); |
f1aef8b6 | 711 | thread_count += cnt > 0 ? cnt : 0; |
b54d5cb9 | 712 | } |
58691d64 | 713 | if (dma_has_cap(DMA_PQ, dma_dev->cap_mask)) { |
e03e93a9 | 714 | cnt = dmatest_add_threads(info, dtc, DMA_PQ); |
d07a74a5 | 715 | thread_count += cnt > 0 ? cnt : 0; |
58691d64 | 716 | } |
b54d5cb9 DW |
717 | |
718 | pr_info("dmatest: Started %u threads using %s\n", | |
719 | thread_count, dma_chan_name(chan)); | |
4a776f0a | 720 | |
838cc704 AS |
721 | list_add_tail(&dtc->node, &info->channels); |
722 | info->nr_channels++; | |
4a776f0a | 723 | |
33df8ca0 | 724 | return 0; |
4a776f0a HS |
725 | } |
726 | ||
7dd60251 | 727 | static bool filter(struct dma_chan *chan, void *param) |
4a776f0a | 728 | { |
15b8a8ea | 729 | struct dmatest_params *params = param; |
e03e93a9 | 730 | |
15b8a8ea AS |
731 | if (!dmatest_match_channel(params, chan) || |
732 | !dmatest_match_device(params, chan->device)) | |
7dd60251 | 733 | return false; |
33df8ca0 | 734 | else |
7dd60251 | 735 | return true; |
4a776f0a HS |
736 | } |
737 | ||
851b7e16 | 738 | static int __run_threaded_test(struct dmatest_info *info) |
4a776f0a | 739 | { |
33df8ca0 DW |
740 | dma_cap_mask_t mask; |
741 | struct dma_chan *chan; | |
15b8a8ea | 742 | struct dmatest_params *params = &info->params; |
33df8ca0 DW |
743 | int err = 0; |
744 | ||
745 | dma_cap_zero(mask); | |
746 | dma_cap_set(DMA_MEMCPY, mask); | |
747 | for (;;) { | |
15b8a8ea | 748 | chan = dma_request_channel(mask, filter, params); |
33df8ca0 | 749 | if (chan) { |
e03e93a9 | 750 | err = dmatest_add_channel(info, chan); |
c56c81ab | 751 | if (err) { |
33df8ca0 DW |
752 | dma_release_channel(chan); |
753 | break; /* add_channel failed, punt */ | |
754 | } | |
755 | } else | |
756 | break; /* no more channels available */ | |
15b8a8ea AS |
757 | if (params->max_channels && |
758 | info->nr_channels >= params->max_channels) | |
33df8ca0 DW |
759 | break; /* we have all we need */ |
760 | } | |
33df8ca0 | 761 | return err; |
4a776f0a | 762 | } |
4a776f0a | 763 | |
851b7e16 AS |
764 | #ifndef MODULE |
765 | static int run_threaded_test(struct dmatest_info *info) | |
766 | { | |
767 | int ret; | |
768 | ||
769 | mutex_lock(&info->lock); | |
770 | ret = __run_threaded_test(info); | |
771 | mutex_unlock(&info->lock); | |
772 | return ret; | |
773 | } | |
774 | #endif | |
775 | ||
776 | static void __stop_threaded_test(struct dmatest_info *info) | |
4a776f0a | 777 | { |
33df8ca0 | 778 | struct dmatest_chan *dtc, *_dtc; |
7cbd4877 | 779 | struct dma_chan *chan; |
33df8ca0 | 780 | |
838cc704 | 781 | list_for_each_entry_safe(dtc, _dtc, &info->channels, node) { |
33df8ca0 | 782 | list_del(&dtc->node); |
7cbd4877 | 783 | chan = dtc->chan; |
33df8ca0 | 784 | dmatest_cleanup_channel(dtc); |
838cc704 | 785 | pr_debug("dmatest: dropped channel %s\n", dma_chan_name(chan)); |
7cbd4877 | 786 | dma_release_channel(chan); |
33df8ca0 | 787 | } |
838cc704 AS |
788 | |
789 | info->nr_channels = 0; | |
4a776f0a | 790 | } |
e03e93a9 | 791 | |
851b7e16 AS |
792 | static void stop_threaded_test(struct dmatest_info *info) |
793 | { | |
794 | mutex_lock(&info->lock); | |
795 | __stop_threaded_test(info); | |
796 | mutex_unlock(&info->lock); | |
797 | } | |
798 | ||
799 | static int __restart_threaded_test(struct dmatest_info *info, bool run) | |
800 | { | |
801 | struct dmatest_params *params = &info->params; | |
802 | int ret; | |
803 | ||
804 | /* Stop any running test first */ | |
805 | __stop_threaded_test(info); | |
806 | ||
807 | if (run == false) | |
808 | return 0; | |
809 | ||
810 | /* Copy test parameters */ | |
811 | memcpy(params, &info->dbgfs_params, sizeof(*params)); | |
812 | ||
813 | /* Run test with new parameters */ | |
814 | ret = __run_threaded_test(info); | |
815 | if (ret) { | |
816 | __stop_threaded_test(info); | |
817 | pr_err("dmatest: Can't run test\n"); | |
818 | } | |
819 | ||
820 | return ret; | |
821 | } | |
822 | ||
823 | static ssize_t dtf_write_string(void *to, size_t available, loff_t *ppos, | |
824 | const void __user *from, size_t count) | |
825 | { | |
826 | char tmp[20]; | |
827 | ssize_t len; | |
828 | ||
829 | len = simple_write_to_buffer(tmp, sizeof(tmp) - 1, ppos, from, count); | |
830 | if (len >= 0) { | |
831 | tmp[len] = '\0'; | |
832 | strlcpy(to, strim(tmp), available); | |
833 | } | |
834 | ||
835 | return len; | |
836 | } | |
837 | ||
838 | static ssize_t dtf_read_channel(struct file *file, char __user *buf, | |
839 | size_t count, loff_t *ppos) | |
840 | { | |
841 | struct dmatest_info *info = file->private_data; | |
842 | return simple_read_from_buffer(buf, count, ppos, | |
843 | info->dbgfs_params.channel, | |
844 | strlen(info->dbgfs_params.channel)); | |
845 | } | |
846 | ||
847 | static ssize_t dtf_write_channel(struct file *file, const char __user *buf, | |
848 | size_t size, loff_t *ppos) | |
849 | { | |
850 | struct dmatest_info *info = file->private_data; | |
851 | return dtf_write_string(info->dbgfs_params.channel, | |
852 | sizeof(info->dbgfs_params.channel), | |
853 | ppos, buf, size); | |
854 | } | |
855 | ||
856 | static const struct file_operations dtf_channel_fops = { | |
857 | .read = dtf_read_channel, | |
858 | .write = dtf_write_channel, | |
859 | .open = simple_open, | |
860 | .llseek = default_llseek, | |
861 | }; | |
862 | ||
863 | static ssize_t dtf_read_device(struct file *file, char __user *buf, | |
864 | size_t count, loff_t *ppos) | |
865 | { | |
866 | struct dmatest_info *info = file->private_data; | |
867 | return simple_read_from_buffer(buf, count, ppos, | |
868 | info->dbgfs_params.device, | |
869 | strlen(info->dbgfs_params.device)); | |
870 | } | |
871 | ||
872 | static ssize_t dtf_write_device(struct file *file, const char __user *buf, | |
873 | size_t size, loff_t *ppos) | |
874 | { | |
875 | struct dmatest_info *info = file->private_data; | |
876 | return dtf_write_string(info->dbgfs_params.device, | |
877 | sizeof(info->dbgfs_params.device), | |
878 | ppos, buf, size); | |
879 | } | |
880 | ||
881 | static const struct file_operations dtf_device_fops = { | |
882 | .read = dtf_read_device, | |
883 | .write = dtf_write_device, | |
884 | .open = simple_open, | |
885 | .llseek = default_llseek, | |
886 | }; | |
887 | ||
888 | static ssize_t dtf_read_run(struct file *file, char __user *user_buf, | |
889 | size_t count, loff_t *ppos) | |
890 | { | |
891 | struct dmatest_info *info = file->private_data; | |
892 | char buf[3]; | |
3e5ccd86 AS |
893 | struct dmatest_chan *dtc; |
894 | bool alive = false; | |
851b7e16 AS |
895 | |
896 | mutex_lock(&info->lock); | |
3e5ccd86 AS |
897 | list_for_each_entry(dtc, &info->channels, node) { |
898 | struct dmatest_thread *thread; | |
899 | ||
900 | list_for_each_entry(thread, &dtc->threads, node) { | |
901 | if (!thread->done) { | |
902 | alive = true; | |
903 | break; | |
904 | } | |
905 | } | |
906 | } | |
907 | ||
908 | if (alive) { | |
851b7e16 | 909 | buf[0] = 'Y'; |
3e5ccd86 AS |
910 | } else { |
911 | __stop_threaded_test(info); | |
851b7e16 | 912 | buf[0] = 'N'; |
3e5ccd86 AS |
913 | } |
914 | ||
851b7e16 AS |
915 | mutex_unlock(&info->lock); |
916 | buf[1] = '\n'; | |
917 | buf[2] = 0x00; | |
918 | return simple_read_from_buffer(user_buf, count, ppos, buf, 2); | |
919 | } | |
920 | ||
921 | static ssize_t dtf_write_run(struct file *file, const char __user *user_buf, | |
922 | size_t count, loff_t *ppos) | |
923 | { | |
924 | struct dmatest_info *info = file->private_data; | |
925 | char buf[16]; | |
926 | bool bv; | |
927 | int ret = 0; | |
928 | ||
929 | if (copy_from_user(buf, user_buf, min(count, (sizeof(buf) - 1)))) | |
930 | return -EFAULT; | |
931 | ||
932 | if (strtobool(buf, &bv) == 0) { | |
933 | mutex_lock(&info->lock); | |
934 | ret = __restart_threaded_test(info, bv); | |
935 | mutex_unlock(&info->lock); | |
936 | } | |
937 | ||
938 | return ret ? ret : count; | |
939 | } | |
940 | ||
941 | static const struct file_operations dtf_run_fops = { | |
942 | .read = dtf_read_run, | |
943 | .write = dtf_write_run, | |
944 | .open = simple_open, | |
945 | .llseek = default_llseek, | |
946 | }; | |
947 | ||
948 | static int dmatest_register_dbgfs(struct dmatest_info *info) | |
949 | { | |
950 | struct dentry *d; | |
951 | struct dmatest_params *params = &info->dbgfs_params; | |
952 | int ret = -ENOMEM; | |
953 | ||
954 | d = debugfs_create_dir("dmatest", NULL); | |
955 | if (IS_ERR(d)) | |
956 | return PTR_ERR(d); | |
957 | if (!d) | |
958 | goto err_root; | |
959 | ||
960 | info->root = d; | |
961 | ||
962 | /* Copy initial values */ | |
963 | memcpy(params, &info->params, sizeof(*params)); | |
964 | ||
965 | /* Test parameters */ | |
966 | ||
967 | d = debugfs_create_u32("test_buf_size", S_IWUSR | S_IRUGO, info->root, | |
968 | (u32 *)¶ms->buf_size); | |
969 | if (IS_ERR_OR_NULL(d)) | |
970 | goto err_node; | |
971 | ||
972 | d = debugfs_create_file("channel", S_IRUGO | S_IWUSR, info->root, | |
973 | info, &dtf_channel_fops); | |
974 | if (IS_ERR_OR_NULL(d)) | |
975 | goto err_node; | |
976 | ||
977 | d = debugfs_create_file("device", S_IRUGO | S_IWUSR, info->root, | |
978 | info, &dtf_device_fops); | |
979 | if (IS_ERR_OR_NULL(d)) | |
980 | goto err_node; | |
981 | ||
982 | d = debugfs_create_u32("threads_per_chan", S_IWUSR | S_IRUGO, info->root, | |
983 | (u32 *)¶ms->threads_per_chan); | |
984 | if (IS_ERR_OR_NULL(d)) | |
985 | goto err_node; | |
986 | ||
987 | d = debugfs_create_u32("max_channels", S_IWUSR | S_IRUGO, info->root, | |
988 | (u32 *)¶ms->max_channels); | |
989 | if (IS_ERR_OR_NULL(d)) | |
990 | goto err_node; | |
991 | ||
992 | d = debugfs_create_u32("iterations", S_IWUSR | S_IRUGO, info->root, | |
993 | (u32 *)¶ms->iterations); | |
994 | if (IS_ERR_OR_NULL(d)) | |
995 | goto err_node; | |
996 | ||
997 | d = debugfs_create_u32("xor_sources", S_IWUSR | S_IRUGO, info->root, | |
998 | (u32 *)¶ms->xor_sources); | |
999 | if (IS_ERR_OR_NULL(d)) | |
1000 | goto err_node; | |
1001 | ||
1002 | d = debugfs_create_u32("pq_sources", S_IWUSR | S_IRUGO, info->root, | |
1003 | (u32 *)¶ms->pq_sources); | |
1004 | if (IS_ERR_OR_NULL(d)) | |
1005 | goto err_node; | |
1006 | ||
1007 | d = debugfs_create_u32("timeout", S_IWUSR | S_IRUGO, info->root, | |
1008 | (u32 *)¶ms->timeout); | |
1009 | if (IS_ERR_OR_NULL(d)) | |
1010 | goto err_node; | |
1011 | ||
1012 | /* Run or stop threaded test */ | |
1013 | d = debugfs_create_file("run", S_IWUSR | S_IRUGO, info->root, | |
1014 | info, &dtf_run_fops); | |
1015 | if (IS_ERR_OR_NULL(d)) | |
1016 | goto err_node; | |
1017 | ||
1018 | return 0; | |
1019 | ||
1020 | err_node: | |
1021 | debugfs_remove_recursive(info->root); | |
1022 | err_root: | |
1023 | pr_err("dmatest: Failed to initialize debugfs\n"); | |
1024 | return ret; | |
1025 | } | |
1026 | ||
e03e93a9 AS |
1027 | static int __init dmatest_init(void) |
1028 | { | |
1029 | struct dmatest_info *info = &test_info; | |
15b8a8ea | 1030 | struct dmatest_params *params = &info->params; |
851b7e16 | 1031 | int ret; |
e03e93a9 AS |
1032 | |
1033 | memset(info, 0, sizeof(*info)); | |
1034 | ||
851b7e16 | 1035 | mutex_init(&info->lock); |
838cc704 AS |
1036 | INIT_LIST_HEAD(&info->channels); |
1037 | ||
1038 | /* Set default parameters */ | |
15b8a8ea AS |
1039 | params->buf_size = test_buf_size; |
1040 | strlcpy(params->channel, test_channel, sizeof(params->channel)); | |
1041 | strlcpy(params->device, test_device, sizeof(params->device)); | |
1042 | params->threads_per_chan = threads_per_chan; | |
1043 | params->max_channels = max_channels; | |
1044 | params->iterations = iterations; | |
1045 | params->xor_sources = xor_sources; | |
1046 | params->pq_sources = pq_sources; | |
1047 | params->timeout = timeout; | |
e03e93a9 | 1048 | |
851b7e16 AS |
1049 | ret = dmatest_register_dbgfs(info); |
1050 | if (ret) | |
1051 | return ret; | |
1052 | ||
1053 | #ifdef MODULE | |
1054 | return 0; | |
1055 | #else | |
e03e93a9 | 1056 | return run_threaded_test(info); |
851b7e16 | 1057 | #endif |
e03e93a9 AS |
1058 | } |
1059 | /* when compiled-in wait for drivers to load first */ | |
1060 | late_initcall(dmatest_init); | |
1061 | ||
1062 | static void __exit dmatest_exit(void) | |
1063 | { | |
1064 | struct dmatest_info *info = &test_info; | |
1065 | ||
851b7e16 | 1066 | debugfs_remove_recursive(info->root); |
e03e93a9 AS |
1067 | stop_threaded_test(info); |
1068 | } | |
4a776f0a HS |
1069 | module_exit(dmatest_exit); |
1070 | ||
e05503ef | 1071 | MODULE_AUTHOR("Haavard Skinnemoen (Atmel)"); |
4a776f0a | 1072 | MODULE_LICENSE("GPL v2"); |