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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 | |
4a776f0a HS |
69 | /* |
70 | * Initialization patterns. All bytes in the source buffer has bit 7 | |
71 | * set, all bytes in the destination buffer has bit 7 cleared. | |
72 | * | |
73 | * Bit 6 is set for all bytes which are to be copied by the DMA | |
74 | * engine. Bit 5 is set for all bytes which are to be overwritten by | |
75 | * the DMA engine. | |
76 | * | |
77 | * The remaining bits are the inverse of a counter which increments by | |
78 | * one for each byte address. | |
79 | */ | |
80 | #define PATTERN_SRC 0x80 | |
81 | #define PATTERN_DST 0x00 | |
82 | #define PATTERN_COPY 0x40 | |
83 | #define PATTERN_OVERWRITE 0x20 | |
84 | #define PATTERN_COUNT_MASK 0x1f | |
85 | ||
e03e93a9 AS |
86 | struct dmatest_info; |
87 | ||
4a776f0a HS |
88 | struct dmatest_thread { |
89 | struct list_head node; | |
e03e93a9 | 90 | struct dmatest_info *info; |
4a776f0a HS |
91 | struct task_struct *task; |
92 | struct dma_chan *chan; | |
b54d5cb9 DW |
93 | u8 **srcs; |
94 | u8 **dsts; | |
95 | enum dma_transaction_type type; | |
4a776f0a HS |
96 | }; |
97 | ||
98 | struct dmatest_chan { | |
99 | struct list_head node; | |
100 | struct dma_chan *chan; | |
101 | struct list_head threads; | |
102 | }; | |
103 | ||
e03e93a9 | 104 | /** |
15b8a8ea | 105 | * struct dmatest_params - test parameters. |
e03e93a9 AS |
106 | * @buf_size: size of the memcpy test buffer |
107 | * @channel: bus ID of the channel to test | |
108 | * @device: bus ID of the DMA Engine to test | |
109 | * @threads_per_chan: number of threads to start per channel | |
110 | * @max_channels: maximum number of channels to use | |
111 | * @iterations: iterations before stopping test | |
112 | * @xor_sources: number of xor source buffers | |
113 | * @pq_sources: number of p+q source buffers | |
114 | * @timeout: transfer timeout in msec, -1 for infinite timeout | |
115 | */ | |
15b8a8ea | 116 | struct dmatest_params { |
e03e93a9 AS |
117 | unsigned int buf_size; |
118 | char channel[20]; | |
119 | char device[20]; | |
120 | unsigned int threads_per_chan; | |
121 | unsigned int max_channels; | |
122 | unsigned int iterations; | |
123 | unsigned int xor_sources; | |
124 | unsigned int pq_sources; | |
125 | int timeout; | |
15b8a8ea AS |
126 | }; |
127 | ||
128 | /** | |
129 | * struct dmatest_info - test information. | |
130 | * @params: test parameters | |
851b7e16 | 131 | * @lock: access protection to the fields of this structure |
15b8a8ea AS |
132 | */ |
133 | struct dmatest_info { | |
134 | /* Test parameters */ | |
135 | struct dmatest_params params; | |
838cc704 AS |
136 | |
137 | /* Internal state */ | |
138 | struct list_head channels; | |
139 | unsigned int nr_channels; | |
851b7e16 AS |
140 | struct mutex lock; |
141 | ||
142 | /* debugfs related stuff */ | |
143 | struct dentry *root; | |
144 | struct dmatest_params dbgfs_params; | |
e03e93a9 AS |
145 | }; |
146 | ||
147 | static struct dmatest_info test_info; | |
148 | ||
15b8a8ea | 149 | static bool dmatest_match_channel(struct dmatest_params *params, |
e03e93a9 | 150 | struct dma_chan *chan) |
4a776f0a | 151 | { |
15b8a8ea | 152 | if (params->channel[0] == '\0') |
4a776f0a | 153 | return true; |
15b8a8ea | 154 | return strcmp(dma_chan_name(chan), params->channel) == 0; |
4a776f0a HS |
155 | } |
156 | ||
15b8a8ea | 157 | static bool dmatest_match_device(struct dmatest_params *params, |
e03e93a9 | 158 | struct dma_device *device) |
4a776f0a | 159 | { |
15b8a8ea | 160 | if (params->device[0] == '\0') |
4a776f0a | 161 | return true; |
15b8a8ea | 162 | return strcmp(dev_name(device->dev), params->device) == 0; |
4a776f0a HS |
163 | } |
164 | ||
165 | static unsigned long dmatest_random(void) | |
166 | { | |
167 | unsigned long buf; | |
168 | ||
169 | get_random_bytes(&buf, sizeof(buf)); | |
170 | return buf; | |
171 | } | |
172 | ||
e03e93a9 AS |
173 | static void dmatest_init_srcs(u8 **bufs, unsigned int start, unsigned int len, |
174 | unsigned int buf_size) | |
4a776f0a HS |
175 | { |
176 | unsigned int i; | |
b54d5cb9 DW |
177 | u8 *buf; |
178 | ||
179 | for (; (buf = *bufs); bufs++) { | |
180 | for (i = 0; i < start; i++) | |
181 | buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK); | |
182 | for ( ; i < start + len; i++) | |
183 | buf[i] = PATTERN_SRC | PATTERN_COPY | |
c019894e | 184 | | (~i & PATTERN_COUNT_MASK); |
e03e93a9 | 185 | for ( ; i < buf_size; i++) |
b54d5cb9 DW |
186 | buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK); |
187 | buf++; | |
188 | } | |
4a776f0a HS |
189 | } |
190 | ||
e03e93a9 AS |
191 | static void dmatest_init_dsts(u8 **bufs, unsigned int start, unsigned int len, |
192 | unsigned int buf_size) | |
4a776f0a HS |
193 | { |
194 | unsigned int i; | |
b54d5cb9 DW |
195 | u8 *buf; |
196 | ||
197 | for (; (buf = *bufs); bufs++) { | |
198 | for (i = 0; i < start; i++) | |
199 | buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK); | |
200 | for ( ; i < start + len; i++) | |
201 | buf[i] = PATTERN_DST | PATTERN_OVERWRITE | |
202 | | (~i & PATTERN_COUNT_MASK); | |
e03e93a9 | 203 | for ( ; i < buf_size; i++) |
b54d5cb9 DW |
204 | buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK); |
205 | } | |
4a776f0a HS |
206 | } |
207 | ||
208 | static void dmatest_mismatch(u8 actual, u8 pattern, unsigned int index, | |
209 | unsigned int counter, bool is_srcbuf) | |
210 | { | |
211 | u8 diff = actual ^ pattern; | |
212 | u8 expected = pattern | (~counter & PATTERN_COUNT_MASK); | |
213 | const char *thread_name = current->comm; | |
214 | ||
215 | if (is_srcbuf) | |
216 | pr_warning("%s: srcbuf[0x%x] overwritten!" | |
217 | " Expected %02x, got %02x\n", | |
218 | thread_name, index, expected, actual); | |
219 | else if ((pattern & PATTERN_COPY) | |
220 | && (diff & (PATTERN_COPY | PATTERN_OVERWRITE))) | |
221 | pr_warning("%s: dstbuf[0x%x] not copied!" | |
222 | " Expected %02x, got %02x\n", | |
223 | thread_name, index, expected, actual); | |
224 | else if (diff & PATTERN_SRC) | |
225 | pr_warning("%s: dstbuf[0x%x] was copied!" | |
226 | " Expected %02x, got %02x\n", | |
227 | thread_name, index, expected, actual); | |
228 | else | |
229 | pr_warning("%s: dstbuf[0x%x] mismatch!" | |
230 | " Expected %02x, got %02x\n", | |
231 | thread_name, index, expected, actual); | |
232 | } | |
233 | ||
b54d5cb9 | 234 | static unsigned int dmatest_verify(u8 **bufs, unsigned int start, |
4a776f0a HS |
235 | unsigned int end, unsigned int counter, u8 pattern, |
236 | bool is_srcbuf) | |
237 | { | |
238 | unsigned int i; | |
239 | unsigned int error_count = 0; | |
240 | u8 actual; | |
b54d5cb9 DW |
241 | u8 expected; |
242 | u8 *buf; | |
243 | unsigned int counter_orig = counter; | |
244 | ||
245 | for (; (buf = *bufs); bufs++) { | |
246 | counter = counter_orig; | |
247 | for (i = start; i < end; i++) { | |
248 | actual = buf[i]; | |
249 | expected = pattern | (~counter & PATTERN_COUNT_MASK); | |
250 | if (actual != expected) { | |
251 | if (error_count < 32) | |
252 | dmatest_mismatch(actual, pattern, i, | |
253 | counter, is_srcbuf); | |
254 | error_count++; | |
255 | } | |
256 | counter++; | |
4a776f0a | 257 | } |
4a776f0a HS |
258 | } |
259 | ||
260 | if (error_count > 32) | |
261 | pr_warning("%s: %u errors suppressed\n", | |
262 | current->comm, error_count - 32); | |
263 | ||
264 | return error_count; | |
265 | } | |
266 | ||
adfa543e TH |
267 | /* poor man's completion - we want to use wait_event_freezable() on it */ |
268 | struct dmatest_done { | |
269 | bool done; | |
270 | wait_queue_head_t *wait; | |
271 | }; | |
272 | ||
273 | static void dmatest_callback(void *arg) | |
e44e0aa3 | 274 | { |
adfa543e TH |
275 | struct dmatest_done *done = arg; |
276 | ||
277 | done->done = true; | |
278 | wake_up_all(done->wait); | |
e44e0aa3 DW |
279 | } |
280 | ||
632fd283 AS |
281 | static inline void unmap_src(struct device *dev, dma_addr_t *addr, size_t len, |
282 | unsigned int count) | |
283 | { | |
284 | while (count--) | |
285 | dma_unmap_single(dev, addr[count], len, DMA_TO_DEVICE); | |
286 | } | |
287 | ||
288 | static inline void unmap_dst(struct device *dev, dma_addr_t *addr, size_t len, | |
289 | unsigned int count) | |
290 | { | |
291 | while (count--) | |
292 | dma_unmap_single(dev, addr[count], len, DMA_BIDIRECTIONAL); | |
293 | } | |
294 | ||
8be9e32b AM |
295 | static unsigned int min_odd(unsigned int x, unsigned int y) |
296 | { | |
297 | unsigned int val = min(x, y); | |
298 | ||
299 | return val % 2 ? val : val - 1; | |
300 | } | |
301 | ||
4a776f0a HS |
302 | /* |
303 | * This function repeatedly tests DMA transfers of various lengths and | |
b54d5cb9 DW |
304 | * offsets for a given operation type until it is told to exit by |
305 | * kthread_stop(). There may be multiple threads running this function | |
306 | * in parallel for a single channel, and there may be multiple channels | |
307 | * being tested in parallel. | |
4a776f0a HS |
308 | * |
309 | * Before each test, the source and destination buffer is initialized | |
310 | * with a known pattern. This pattern is different depending on | |
311 | * whether it's in an area which is supposed to be copied or | |
312 | * overwritten, and different in the source and destination buffers. | |
313 | * So if the DMA engine doesn't copy exactly what we tell it to copy, | |
314 | * we'll notice. | |
315 | */ | |
316 | static int dmatest_func(void *data) | |
317 | { | |
adfa543e | 318 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(done_wait); |
4a776f0a | 319 | struct dmatest_thread *thread = data; |
adfa543e | 320 | struct dmatest_done done = { .wait = &done_wait }; |
e03e93a9 | 321 | struct dmatest_info *info; |
15b8a8ea | 322 | struct dmatest_params *params; |
4a776f0a | 323 | struct dma_chan *chan; |
8be9e32b | 324 | struct dma_device *dev; |
4a776f0a HS |
325 | const char *thread_name; |
326 | unsigned int src_off, dst_off, len; | |
327 | unsigned int error_count; | |
328 | unsigned int failed_tests = 0; | |
329 | unsigned int total_tests = 0; | |
330 | dma_cookie_t cookie; | |
331 | enum dma_status status; | |
b54d5cb9 | 332 | enum dma_ctrl_flags flags; |
945b5af3 | 333 | u8 *pq_coefs = NULL; |
4a776f0a | 334 | int ret; |
b54d5cb9 DW |
335 | int src_cnt; |
336 | int dst_cnt; | |
337 | int i; | |
4a776f0a HS |
338 | |
339 | thread_name = current->comm; | |
adfa543e | 340 | set_freezable(); |
4a776f0a HS |
341 | |
342 | ret = -ENOMEM; | |
4a776f0a HS |
343 | |
344 | smp_rmb(); | |
e03e93a9 | 345 | info = thread->info; |
15b8a8ea | 346 | params = &info->params; |
4a776f0a | 347 | chan = thread->chan; |
8be9e32b | 348 | dev = chan->device; |
b54d5cb9 DW |
349 | if (thread->type == DMA_MEMCPY) |
350 | src_cnt = dst_cnt = 1; | |
351 | else if (thread->type == DMA_XOR) { | |
8be9e32b | 352 | /* force odd to ensure dst = src */ |
15b8a8ea | 353 | src_cnt = min_odd(params->xor_sources | 1, dev->max_xor); |
b54d5cb9 | 354 | dst_cnt = 1; |
58691d64 | 355 | } else if (thread->type == DMA_PQ) { |
8be9e32b | 356 | /* force odd to ensure dst = src */ |
15b8a8ea | 357 | src_cnt = min_odd(params->pq_sources | 1, dma_maxpq(dev, 0)); |
58691d64 | 358 | dst_cnt = 2; |
945b5af3 | 359 | |
15b8a8ea | 360 | pq_coefs = kmalloc(params->pq_sources+1, GFP_KERNEL); |
945b5af3 AS |
361 | if (!pq_coefs) |
362 | goto err_thread_type; | |
363 | ||
94de648d | 364 | for (i = 0; i < src_cnt; i++) |
58691d64 | 365 | pq_coefs[i] = 1; |
b54d5cb9 | 366 | } else |
945b5af3 | 367 | goto err_thread_type; |
b54d5cb9 DW |
368 | |
369 | thread->srcs = kcalloc(src_cnt+1, sizeof(u8 *), GFP_KERNEL); | |
370 | if (!thread->srcs) | |
371 | goto err_srcs; | |
372 | for (i = 0; i < src_cnt; i++) { | |
15b8a8ea | 373 | thread->srcs[i] = kmalloc(params->buf_size, GFP_KERNEL); |
b54d5cb9 DW |
374 | if (!thread->srcs[i]) |
375 | goto err_srcbuf; | |
376 | } | |
377 | thread->srcs[i] = NULL; | |
378 | ||
379 | thread->dsts = kcalloc(dst_cnt+1, sizeof(u8 *), GFP_KERNEL); | |
380 | if (!thread->dsts) | |
381 | goto err_dsts; | |
382 | for (i = 0; i < dst_cnt; i++) { | |
15b8a8ea | 383 | thread->dsts[i] = kmalloc(params->buf_size, GFP_KERNEL); |
b54d5cb9 DW |
384 | if (!thread->dsts[i]) |
385 | goto err_dstbuf; | |
386 | } | |
387 | thread->dsts[i] = NULL; | |
388 | ||
e44e0aa3 DW |
389 | set_user_nice(current, 10); |
390 | ||
b203bd3f IS |
391 | /* |
392 | * src buffers are freed by the DMAEngine code with dma_unmap_single() | |
393 | * dst buffers are freed by ourselves below | |
394 | */ | |
395 | flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT | |
396 | | DMA_COMPL_SKIP_DEST_UNMAP | DMA_COMPL_SRC_UNMAP_SINGLE; | |
4a776f0a | 397 | |
0a2ff57d | 398 | while (!kthread_should_stop() |
15b8a8ea | 399 | && !(params->iterations && total_tests >= params->iterations)) { |
b54d5cb9 DW |
400 | struct dma_async_tx_descriptor *tx = NULL; |
401 | dma_addr_t dma_srcs[src_cnt]; | |
402 | dma_addr_t dma_dsts[dst_cnt]; | |
83544ae9 | 403 | u8 align = 0; |
d86be86e | 404 | |
4a776f0a HS |
405 | total_tests++; |
406 | ||
83544ae9 DW |
407 | /* honor alignment restrictions */ |
408 | if (thread->type == DMA_MEMCPY) | |
409 | align = dev->copy_align; | |
410 | else if (thread->type == DMA_XOR) | |
411 | align = dev->xor_align; | |
412 | else if (thread->type == DMA_PQ) | |
413 | align = dev->pq_align; | |
414 | ||
15b8a8ea | 415 | if (1 << align > params->buf_size) { |
cfe4f275 | 416 | pr_err("%u-byte buffer too small for %d-byte alignment\n", |
15b8a8ea | 417 | params->buf_size, 1 << align); |
cfe4f275 GL |
418 | break; |
419 | } | |
420 | ||
15b8a8ea | 421 | len = dmatest_random() % params->buf_size + 1; |
83544ae9 | 422 | len = (len >> align) << align; |
cfe4f275 GL |
423 | if (!len) |
424 | len = 1 << align; | |
15b8a8ea AS |
425 | src_off = dmatest_random() % (params->buf_size - len + 1); |
426 | dst_off = dmatest_random() % (params->buf_size - len + 1); | |
cfe4f275 | 427 | |
83544ae9 DW |
428 | src_off = (src_off >> align) << align; |
429 | dst_off = (dst_off >> align) << align; | |
430 | ||
15b8a8ea AS |
431 | dmatest_init_srcs(thread->srcs, src_off, len, params->buf_size); |
432 | dmatest_init_dsts(thread->dsts, dst_off, len, params->buf_size); | |
4a776f0a | 433 | |
b54d5cb9 DW |
434 | for (i = 0; i < src_cnt; i++) { |
435 | u8 *buf = thread->srcs[i] + src_off; | |
436 | ||
437 | dma_srcs[i] = dma_map_single(dev->dev, buf, len, | |
438 | DMA_TO_DEVICE); | |
afde3be1 AS |
439 | ret = dma_mapping_error(dev->dev, dma_srcs[i]); |
440 | if (ret) { | |
441 | unmap_src(dev->dev, dma_srcs, len, i); | |
442 | pr_warn("%s: #%u: mapping error %d with " | |
443 | "src_off=0x%x len=0x%x\n", | |
444 | thread_name, total_tests - 1, ret, | |
445 | src_off, len); | |
446 | failed_tests++; | |
447 | continue; | |
448 | } | |
b54d5cb9 | 449 | } |
d86be86e | 450 | /* map with DMA_BIDIRECTIONAL to force writeback/invalidate */ |
b54d5cb9 DW |
451 | for (i = 0; i < dst_cnt; i++) { |
452 | dma_dsts[i] = dma_map_single(dev->dev, thread->dsts[i], | |
15b8a8ea | 453 | params->buf_size, |
b54d5cb9 | 454 | DMA_BIDIRECTIONAL); |
afde3be1 AS |
455 | ret = dma_mapping_error(dev->dev, dma_dsts[i]); |
456 | if (ret) { | |
457 | unmap_src(dev->dev, dma_srcs, len, src_cnt); | |
15b8a8ea AS |
458 | unmap_dst(dev->dev, dma_dsts, params->buf_size, |
459 | i); | |
afde3be1 AS |
460 | pr_warn("%s: #%u: mapping error %d with " |
461 | "dst_off=0x%x len=0x%x\n", | |
462 | thread_name, total_tests - 1, ret, | |
15b8a8ea | 463 | dst_off, params->buf_size); |
afde3be1 AS |
464 | failed_tests++; |
465 | continue; | |
466 | } | |
b54d5cb9 DW |
467 | } |
468 | ||
469 | if (thread->type == DMA_MEMCPY) | |
470 | tx = dev->device_prep_dma_memcpy(chan, | |
471 | dma_dsts[0] + dst_off, | |
472 | dma_srcs[0], len, | |
473 | flags); | |
474 | else if (thread->type == DMA_XOR) | |
475 | tx = dev->device_prep_dma_xor(chan, | |
476 | dma_dsts[0] + dst_off, | |
67b9124f | 477 | dma_srcs, src_cnt, |
b54d5cb9 | 478 | len, flags); |
58691d64 DW |
479 | else if (thread->type == DMA_PQ) { |
480 | dma_addr_t dma_pq[dst_cnt]; | |
481 | ||
482 | for (i = 0; i < dst_cnt; i++) | |
483 | dma_pq[i] = dma_dsts[i] + dst_off; | |
484 | tx = dev->device_prep_dma_pq(chan, dma_pq, dma_srcs, | |
94de648d | 485 | src_cnt, pq_coefs, |
58691d64 DW |
486 | len, flags); |
487 | } | |
d86be86e | 488 | |
d86be86e | 489 | if (!tx) { |
632fd283 | 490 | unmap_src(dev->dev, dma_srcs, len, src_cnt); |
15b8a8ea AS |
491 | unmap_dst(dev->dev, dma_dsts, params->buf_size, |
492 | dst_cnt); | |
d86be86e AN |
493 | pr_warning("%s: #%u: prep error with src_off=0x%x " |
494 | "dst_off=0x%x len=0x%x\n", | |
495 | thread_name, total_tests - 1, | |
496 | src_off, dst_off, len); | |
497 | msleep(100); | |
498 | failed_tests++; | |
499 | continue; | |
500 | } | |
e44e0aa3 | 501 | |
adfa543e | 502 | done.done = false; |
e44e0aa3 | 503 | tx->callback = dmatest_callback; |
adfa543e | 504 | tx->callback_param = &done; |
d86be86e AN |
505 | cookie = tx->tx_submit(tx); |
506 | ||
4a776f0a HS |
507 | if (dma_submit_error(cookie)) { |
508 | pr_warning("%s: #%u: submit error %d with src_off=0x%x " | |
509 | "dst_off=0x%x len=0x%x\n", | |
510 | thread_name, total_tests - 1, cookie, | |
511 | src_off, dst_off, len); | |
512 | msleep(100); | |
513 | failed_tests++; | |
514 | continue; | |
515 | } | |
b54d5cb9 | 516 | dma_async_issue_pending(chan); |
4a776f0a | 517 | |
77101ce5 AS |
518 | wait_event_freezable_timeout(done_wait, |
519 | done.done || kthread_should_stop(), | |
15b8a8ea | 520 | msecs_to_jiffies(params->timeout)); |
981ed70d | 521 | |
e44e0aa3 | 522 | status = dma_async_is_tx_complete(chan, cookie, NULL, NULL); |
4a776f0a | 523 | |
adfa543e TH |
524 | if (!done.done) { |
525 | /* | |
526 | * We're leaving the timed out dma operation with | |
527 | * dangling pointer to done_wait. To make this | |
528 | * correct, we'll need to allocate wait_done for | |
529 | * each test iteration and perform "who's gonna | |
530 | * free it this time?" dancing. For now, just | |
531 | * leave it dangling. | |
532 | */ | |
e44e0aa3 DW |
533 | pr_warning("%s: #%u: test timed out\n", |
534 | thread_name, total_tests - 1); | |
535 | failed_tests++; | |
536 | continue; | |
537 | } else if (status != DMA_SUCCESS) { | |
538 | pr_warning("%s: #%u: got completion callback," | |
539 | " but status is \'%s\'\n", | |
540 | thread_name, total_tests - 1, | |
541 | status == DMA_ERROR ? "error" : "in progress"); | |
4a776f0a HS |
542 | failed_tests++; |
543 | continue; | |
544 | } | |
e44e0aa3 | 545 | |
d86be86e | 546 | /* Unmap by myself (see DMA_COMPL_SKIP_DEST_UNMAP above) */ |
15b8a8ea | 547 | unmap_dst(dev->dev, dma_dsts, params->buf_size, dst_cnt); |
4a776f0a HS |
548 | |
549 | error_count = 0; | |
550 | ||
551 | pr_debug("%s: verifying source buffer...\n", thread_name); | |
b54d5cb9 | 552 | error_count += dmatest_verify(thread->srcs, 0, src_off, |
4a776f0a | 553 | 0, PATTERN_SRC, true); |
b54d5cb9 | 554 | error_count += dmatest_verify(thread->srcs, src_off, |
4a776f0a HS |
555 | src_off + len, src_off, |
556 | PATTERN_SRC | PATTERN_COPY, true); | |
b54d5cb9 | 557 | error_count += dmatest_verify(thread->srcs, src_off + len, |
15b8a8ea | 558 | params->buf_size, src_off + len, |
4a776f0a HS |
559 | PATTERN_SRC, true); |
560 | ||
561 | pr_debug("%s: verifying dest buffer...\n", | |
562 | thread->task->comm); | |
b54d5cb9 | 563 | error_count += dmatest_verify(thread->dsts, 0, dst_off, |
4a776f0a | 564 | 0, PATTERN_DST, false); |
b54d5cb9 | 565 | error_count += dmatest_verify(thread->dsts, dst_off, |
4a776f0a HS |
566 | dst_off + len, src_off, |
567 | PATTERN_SRC | PATTERN_COPY, false); | |
b54d5cb9 | 568 | error_count += dmatest_verify(thread->dsts, dst_off + len, |
15b8a8ea | 569 | params->buf_size, dst_off + len, |
4a776f0a HS |
570 | PATTERN_DST, false); |
571 | ||
572 | if (error_count) { | |
573 | pr_warning("%s: #%u: %u errors with " | |
574 | "src_off=0x%x dst_off=0x%x len=0x%x\n", | |
575 | thread_name, total_tests - 1, error_count, | |
576 | src_off, dst_off, len); | |
577 | failed_tests++; | |
578 | } else { | |
579 | pr_debug("%s: #%u: No errors with " | |
580 | "src_off=0x%x dst_off=0x%x len=0x%x\n", | |
581 | thread_name, total_tests - 1, | |
582 | src_off, dst_off, len); | |
583 | } | |
584 | } | |
585 | ||
586 | ret = 0; | |
b54d5cb9 DW |
587 | for (i = 0; thread->dsts[i]; i++) |
588 | kfree(thread->dsts[i]); | |
4a776f0a | 589 | err_dstbuf: |
b54d5cb9 DW |
590 | kfree(thread->dsts); |
591 | err_dsts: | |
592 | for (i = 0; thread->srcs[i]; i++) | |
593 | kfree(thread->srcs[i]); | |
4a776f0a | 594 | err_srcbuf: |
b54d5cb9 DW |
595 | kfree(thread->srcs); |
596 | err_srcs: | |
945b5af3 AS |
597 | kfree(pq_coefs); |
598 | err_thread_type: | |
4a776f0a HS |
599 | pr_notice("%s: terminating after %u tests, %u failures (status %d)\n", |
600 | thread_name, total_tests, failed_tests, ret); | |
0a2ff57d | 601 | |
9704efaa | 602 | /* terminate all transfers on specified channels */ |
5e034f7b SH |
603 | if (ret) |
604 | dmaengine_terminate_all(chan); | |
605 | ||
15b8a8ea | 606 | if (params->iterations > 0) |
0a2ff57d | 607 | while (!kthread_should_stop()) { |
b953df7c | 608 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wait_dmatest_exit); |
0a2ff57d NF |
609 | interruptible_sleep_on(&wait_dmatest_exit); |
610 | } | |
611 | ||
4a776f0a HS |
612 | return ret; |
613 | } | |
614 | ||
615 | static void dmatest_cleanup_channel(struct dmatest_chan *dtc) | |
616 | { | |
617 | struct dmatest_thread *thread; | |
618 | struct dmatest_thread *_thread; | |
619 | int ret; | |
620 | ||
621 | list_for_each_entry_safe(thread, _thread, &dtc->threads, node) { | |
622 | ret = kthread_stop(thread->task); | |
623 | pr_debug("dmatest: thread %s exited with status %d\n", | |
624 | thread->task->comm, ret); | |
625 | list_del(&thread->node); | |
626 | kfree(thread); | |
627 | } | |
9704efaa VK |
628 | |
629 | /* terminate all transfers on specified channels */ | |
944ea4dd | 630 | dmaengine_terminate_all(dtc->chan); |
9704efaa | 631 | |
4a776f0a HS |
632 | kfree(dtc); |
633 | } | |
634 | ||
e03e93a9 AS |
635 | static int dmatest_add_threads(struct dmatest_info *info, |
636 | struct dmatest_chan *dtc, enum dma_transaction_type type) | |
4a776f0a | 637 | { |
15b8a8ea | 638 | struct dmatest_params *params = &info->params; |
b54d5cb9 DW |
639 | struct dmatest_thread *thread; |
640 | struct dma_chan *chan = dtc->chan; | |
641 | char *op; | |
642 | unsigned int i; | |
4a776f0a | 643 | |
b54d5cb9 DW |
644 | if (type == DMA_MEMCPY) |
645 | op = "copy"; | |
646 | else if (type == DMA_XOR) | |
647 | op = "xor"; | |
58691d64 DW |
648 | else if (type == DMA_PQ) |
649 | op = "pq"; | |
b54d5cb9 DW |
650 | else |
651 | return -EINVAL; | |
4a776f0a | 652 | |
15b8a8ea | 653 | for (i = 0; i < params->threads_per_chan; i++) { |
4a776f0a HS |
654 | thread = kzalloc(sizeof(struct dmatest_thread), GFP_KERNEL); |
655 | if (!thread) { | |
b54d5cb9 DW |
656 | pr_warning("dmatest: No memory for %s-%s%u\n", |
657 | dma_chan_name(chan), op, i); | |
658 | ||
4a776f0a HS |
659 | break; |
660 | } | |
e03e93a9 | 661 | thread->info = info; |
4a776f0a | 662 | thread->chan = dtc->chan; |
b54d5cb9 | 663 | thread->type = type; |
4a776f0a | 664 | smp_wmb(); |
b54d5cb9 DW |
665 | thread->task = kthread_run(dmatest_func, thread, "%s-%s%u", |
666 | dma_chan_name(chan), op, i); | |
4a776f0a | 667 | if (IS_ERR(thread->task)) { |
b54d5cb9 DW |
668 | pr_warning("dmatest: Failed to run thread %s-%s%u\n", |
669 | dma_chan_name(chan), op, i); | |
4a776f0a HS |
670 | kfree(thread); |
671 | break; | |
672 | } | |
673 | ||
674 | /* srcbuf and dstbuf are allocated by the thread itself */ | |
675 | ||
676 | list_add_tail(&thread->node, &dtc->threads); | |
677 | } | |
678 | ||
b54d5cb9 DW |
679 | return i; |
680 | } | |
681 | ||
e03e93a9 AS |
682 | static int dmatest_add_channel(struct dmatest_info *info, |
683 | struct dma_chan *chan) | |
b54d5cb9 DW |
684 | { |
685 | struct dmatest_chan *dtc; | |
686 | struct dma_device *dma_dev = chan->device; | |
687 | unsigned int thread_count = 0; | |
b9033e68 | 688 | int cnt; |
b54d5cb9 DW |
689 | |
690 | dtc = kmalloc(sizeof(struct dmatest_chan), GFP_KERNEL); | |
691 | if (!dtc) { | |
692 | pr_warning("dmatest: No memory for %s\n", dma_chan_name(chan)); | |
693 | return -ENOMEM; | |
694 | } | |
695 | ||
696 | dtc->chan = chan; | |
697 | INIT_LIST_HEAD(&dtc->threads); | |
698 | ||
699 | if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) { | |
e03e93a9 | 700 | cnt = dmatest_add_threads(info, dtc, DMA_MEMCPY); |
f1aef8b6 | 701 | thread_count += cnt > 0 ? cnt : 0; |
b54d5cb9 DW |
702 | } |
703 | if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) { | |
e03e93a9 | 704 | cnt = dmatest_add_threads(info, dtc, DMA_XOR); |
f1aef8b6 | 705 | thread_count += cnt > 0 ? cnt : 0; |
b54d5cb9 | 706 | } |
58691d64 | 707 | if (dma_has_cap(DMA_PQ, dma_dev->cap_mask)) { |
e03e93a9 | 708 | cnt = dmatest_add_threads(info, dtc, DMA_PQ); |
d07a74a5 | 709 | thread_count += cnt > 0 ? cnt : 0; |
58691d64 | 710 | } |
b54d5cb9 DW |
711 | |
712 | pr_info("dmatest: Started %u threads using %s\n", | |
713 | thread_count, dma_chan_name(chan)); | |
4a776f0a | 714 | |
838cc704 AS |
715 | list_add_tail(&dtc->node, &info->channels); |
716 | info->nr_channels++; | |
4a776f0a | 717 | |
33df8ca0 | 718 | return 0; |
4a776f0a HS |
719 | } |
720 | ||
7dd60251 | 721 | static bool filter(struct dma_chan *chan, void *param) |
4a776f0a | 722 | { |
15b8a8ea | 723 | struct dmatest_params *params = param; |
e03e93a9 | 724 | |
15b8a8ea AS |
725 | if (!dmatest_match_channel(params, chan) || |
726 | !dmatest_match_device(params, chan->device)) | |
7dd60251 | 727 | return false; |
33df8ca0 | 728 | else |
7dd60251 | 729 | return true; |
4a776f0a HS |
730 | } |
731 | ||
851b7e16 | 732 | static int __run_threaded_test(struct dmatest_info *info) |
4a776f0a | 733 | { |
33df8ca0 DW |
734 | dma_cap_mask_t mask; |
735 | struct dma_chan *chan; | |
15b8a8ea | 736 | struct dmatest_params *params = &info->params; |
33df8ca0 DW |
737 | int err = 0; |
738 | ||
739 | dma_cap_zero(mask); | |
740 | dma_cap_set(DMA_MEMCPY, mask); | |
741 | for (;;) { | |
15b8a8ea | 742 | chan = dma_request_channel(mask, filter, params); |
33df8ca0 | 743 | if (chan) { |
e03e93a9 | 744 | err = dmatest_add_channel(info, chan); |
c56c81ab | 745 | if (err) { |
33df8ca0 DW |
746 | dma_release_channel(chan); |
747 | break; /* add_channel failed, punt */ | |
748 | } | |
749 | } else | |
750 | break; /* no more channels available */ | |
15b8a8ea AS |
751 | if (params->max_channels && |
752 | info->nr_channels >= params->max_channels) | |
33df8ca0 DW |
753 | break; /* we have all we need */ |
754 | } | |
33df8ca0 | 755 | return err; |
4a776f0a | 756 | } |
4a776f0a | 757 | |
851b7e16 AS |
758 | #ifndef MODULE |
759 | static int run_threaded_test(struct dmatest_info *info) | |
760 | { | |
761 | int ret; | |
762 | ||
763 | mutex_lock(&info->lock); | |
764 | ret = __run_threaded_test(info); | |
765 | mutex_unlock(&info->lock); | |
766 | return ret; | |
767 | } | |
768 | #endif | |
769 | ||
770 | static void __stop_threaded_test(struct dmatest_info *info) | |
4a776f0a | 771 | { |
33df8ca0 | 772 | struct dmatest_chan *dtc, *_dtc; |
7cbd4877 | 773 | struct dma_chan *chan; |
33df8ca0 | 774 | |
838cc704 | 775 | list_for_each_entry_safe(dtc, _dtc, &info->channels, node) { |
33df8ca0 | 776 | list_del(&dtc->node); |
7cbd4877 | 777 | chan = dtc->chan; |
33df8ca0 | 778 | dmatest_cleanup_channel(dtc); |
838cc704 | 779 | pr_debug("dmatest: dropped channel %s\n", dma_chan_name(chan)); |
7cbd4877 | 780 | dma_release_channel(chan); |
33df8ca0 | 781 | } |
838cc704 AS |
782 | |
783 | info->nr_channels = 0; | |
4a776f0a | 784 | } |
e03e93a9 | 785 | |
851b7e16 AS |
786 | static void stop_threaded_test(struct dmatest_info *info) |
787 | { | |
788 | mutex_lock(&info->lock); | |
789 | __stop_threaded_test(info); | |
790 | mutex_unlock(&info->lock); | |
791 | } | |
792 | ||
793 | static int __restart_threaded_test(struct dmatest_info *info, bool run) | |
794 | { | |
795 | struct dmatest_params *params = &info->params; | |
796 | int ret; | |
797 | ||
798 | /* Stop any running test first */ | |
799 | __stop_threaded_test(info); | |
800 | ||
801 | if (run == false) | |
802 | return 0; | |
803 | ||
804 | /* Copy test parameters */ | |
805 | memcpy(params, &info->dbgfs_params, sizeof(*params)); | |
806 | ||
807 | /* Run test with new parameters */ | |
808 | ret = __run_threaded_test(info); | |
809 | if (ret) { | |
810 | __stop_threaded_test(info); | |
811 | pr_err("dmatest: Can't run test\n"); | |
812 | } | |
813 | ||
814 | return ret; | |
815 | } | |
816 | ||
817 | static ssize_t dtf_write_string(void *to, size_t available, loff_t *ppos, | |
818 | const void __user *from, size_t count) | |
819 | { | |
820 | char tmp[20]; | |
821 | ssize_t len; | |
822 | ||
823 | len = simple_write_to_buffer(tmp, sizeof(tmp) - 1, ppos, from, count); | |
824 | if (len >= 0) { | |
825 | tmp[len] = '\0'; | |
826 | strlcpy(to, strim(tmp), available); | |
827 | } | |
828 | ||
829 | return len; | |
830 | } | |
831 | ||
832 | static ssize_t dtf_read_channel(struct file *file, char __user *buf, | |
833 | size_t count, loff_t *ppos) | |
834 | { | |
835 | struct dmatest_info *info = file->private_data; | |
836 | return simple_read_from_buffer(buf, count, ppos, | |
837 | info->dbgfs_params.channel, | |
838 | strlen(info->dbgfs_params.channel)); | |
839 | } | |
840 | ||
841 | static ssize_t dtf_write_channel(struct file *file, const char __user *buf, | |
842 | size_t size, loff_t *ppos) | |
843 | { | |
844 | struct dmatest_info *info = file->private_data; | |
845 | return dtf_write_string(info->dbgfs_params.channel, | |
846 | sizeof(info->dbgfs_params.channel), | |
847 | ppos, buf, size); | |
848 | } | |
849 | ||
850 | static const struct file_operations dtf_channel_fops = { | |
851 | .read = dtf_read_channel, | |
852 | .write = dtf_write_channel, | |
853 | .open = simple_open, | |
854 | .llseek = default_llseek, | |
855 | }; | |
856 | ||
857 | static ssize_t dtf_read_device(struct file *file, char __user *buf, | |
858 | size_t count, loff_t *ppos) | |
859 | { | |
860 | struct dmatest_info *info = file->private_data; | |
861 | return simple_read_from_buffer(buf, count, ppos, | |
862 | info->dbgfs_params.device, | |
863 | strlen(info->dbgfs_params.device)); | |
864 | } | |
865 | ||
866 | static ssize_t dtf_write_device(struct file *file, const char __user *buf, | |
867 | size_t size, loff_t *ppos) | |
868 | { | |
869 | struct dmatest_info *info = file->private_data; | |
870 | return dtf_write_string(info->dbgfs_params.device, | |
871 | sizeof(info->dbgfs_params.device), | |
872 | ppos, buf, size); | |
873 | } | |
874 | ||
875 | static const struct file_operations dtf_device_fops = { | |
876 | .read = dtf_read_device, | |
877 | .write = dtf_write_device, | |
878 | .open = simple_open, | |
879 | .llseek = default_llseek, | |
880 | }; | |
881 | ||
882 | static ssize_t dtf_read_run(struct file *file, char __user *user_buf, | |
883 | size_t count, loff_t *ppos) | |
884 | { | |
885 | struct dmatest_info *info = file->private_data; | |
886 | char buf[3]; | |
887 | ||
888 | mutex_lock(&info->lock); | |
889 | if (info->nr_channels) | |
890 | buf[0] = 'Y'; | |
891 | else | |
892 | buf[0] = 'N'; | |
893 | mutex_unlock(&info->lock); | |
894 | buf[1] = '\n'; | |
895 | buf[2] = 0x00; | |
896 | return simple_read_from_buffer(user_buf, count, ppos, buf, 2); | |
897 | } | |
898 | ||
899 | static ssize_t dtf_write_run(struct file *file, const char __user *user_buf, | |
900 | size_t count, loff_t *ppos) | |
901 | { | |
902 | struct dmatest_info *info = file->private_data; | |
903 | char buf[16]; | |
904 | bool bv; | |
905 | int ret = 0; | |
906 | ||
907 | if (copy_from_user(buf, user_buf, min(count, (sizeof(buf) - 1)))) | |
908 | return -EFAULT; | |
909 | ||
910 | if (strtobool(buf, &bv) == 0) { | |
911 | mutex_lock(&info->lock); | |
912 | ret = __restart_threaded_test(info, bv); | |
913 | mutex_unlock(&info->lock); | |
914 | } | |
915 | ||
916 | return ret ? ret : count; | |
917 | } | |
918 | ||
919 | static const struct file_operations dtf_run_fops = { | |
920 | .read = dtf_read_run, | |
921 | .write = dtf_write_run, | |
922 | .open = simple_open, | |
923 | .llseek = default_llseek, | |
924 | }; | |
925 | ||
926 | static int dmatest_register_dbgfs(struct dmatest_info *info) | |
927 | { | |
928 | struct dentry *d; | |
929 | struct dmatest_params *params = &info->dbgfs_params; | |
930 | int ret = -ENOMEM; | |
931 | ||
932 | d = debugfs_create_dir("dmatest", NULL); | |
933 | if (IS_ERR(d)) | |
934 | return PTR_ERR(d); | |
935 | if (!d) | |
936 | goto err_root; | |
937 | ||
938 | info->root = d; | |
939 | ||
940 | /* Copy initial values */ | |
941 | memcpy(params, &info->params, sizeof(*params)); | |
942 | ||
943 | /* Test parameters */ | |
944 | ||
945 | d = debugfs_create_u32("test_buf_size", S_IWUSR | S_IRUGO, info->root, | |
946 | (u32 *)¶ms->buf_size); | |
947 | if (IS_ERR_OR_NULL(d)) | |
948 | goto err_node; | |
949 | ||
950 | d = debugfs_create_file("channel", S_IRUGO | S_IWUSR, info->root, | |
951 | info, &dtf_channel_fops); | |
952 | if (IS_ERR_OR_NULL(d)) | |
953 | goto err_node; | |
954 | ||
955 | d = debugfs_create_file("device", S_IRUGO | S_IWUSR, info->root, | |
956 | info, &dtf_device_fops); | |
957 | if (IS_ERR_OR_NULL(d)) | |
958 | goto err_node; | |
959 | ||
960 | d = debugfs_create_u32("threads_per_chan", S_IWUSR | S_IRUGO, info->root, | |
961 | (u32 *)¶ms->threads_per_chan); | |
962 | if (IS_ERR_OR_NULL(d)) | |
963 | goto err_node; | |
964 | ||
965 | d = debugfs_create_u32("max_channels", S_IWUSR | S_IRUGO, info->root, | |
966 | (u32 *)¶ms->max_channels); | |
967 | if (IS_ERR_OR_NULL(d)) | |
968 | goto err_node; | |
969 | ||
970 | d = debugfs_create_u32("iterations", S_IWUSR | S_IRUGO, info->root, | |
971 | (u32 *)¶ms->iterations); | |
972 | if (IS_ERR_OR_NULL(d)) | |
973 | goto err_node; | |
974 | ||
975 | d = debugfs_create_u32("xor_sources", S_IWUSR | S_IRUGO, info->root, | |
976 | (u32 *)¶ms->xor_sources); | |
977 | if (IS_ERR_OR_NULL(d)) | |
978 | goto err_node; | |
979 | ||
980 | d = debugfs_create_u32("pq_sources", S_IWUSR | S_IRUGO, info->root, | |
981 | (u32 *)¶ms->pq_sources); | |
982 | if (IS_ERR_OR_NULL(d)) | |
983 | goto err_node; | |
984 | ||
985 | d = debugfs_create_u32("timeout", S_IWUSR | S_IRUGO, info->root, | |
986 | (u32 *)¶ms->timeout); | |
987 | if (IS_ERR_OR_NULL(d)) | |
988 | goto err_node; | |
989 | ||
990 | /* Run or stop threaded test */ | |
991 | d = debugfs_create_file("run", S_IWUSR | S_IRUGO, info->root, | |
992 | info, &dtf_run_fops); | |
993 | if (IS_ERR_OR_NULL(d)) | |
994 | goto err_node; | |
995 | ||
996 | return 0; | |
997 | ||
998 | err_node: | |
999 | debugfs_remove_recursive(info->root); | |
1000 | err_root: | |
1001 | pr_err("dmatest: Failed to initialize debugfs\n"); | |
1002 | return ret; | |
1003 | } | |
1004 | ||
e03e93a9 AS |
1005 | static int __init dmatest_init(void) |
1006 | { | |
1007 | struct dmatest_info *info = &test_info; | |
15b8a8ea | 1008 | struct dmatest_params *params = &info->params; |
851b7e16 | 1009 | int ret; |
e03e93a9 AS |
1010 | |
1011 | memset(info, 0, sizeof(*info)); | |
1012 | ||
851b7e16 | 1013 | mutex_init(&info->lock); |
838cc704 AS |
1014 | INIT_LIST_HEAD(&info->channels); |
1015 | ||
1016 | /* Set default parameters */ | |
15b8a8ea AS |
1017 | params->buf_size = test_buf_size; |
1018 | strlcpy(params->channel, test_channel, sizeof(params->channel)); | |
1019 | strlcpy(params->device, test_device, sizeof(params->device)); | |
1020 | params->threads_per_chan = threads_per_chan; | |
1021 | params->max_channels = max_channels; | |
1022 | params->iterations = iterations; | |
1023 | params->xor_sources = xor_sources; | |
1024 | params->pq_sources = pq_sources; | |
1025 | params->timeout = timeout; | |
e03e93a9 | 1026 | |
851b7e16 AS |
1027 | ret = dmatest_register_dbgfs(info); |
1028 | if (ret) | |
1029 | return ret; | |
1030 | ||
1031 | #ifdef MODULE | |
1032 | return 0; | |
1033 | #else | |
e03e93a9 | 1034 | return run_threaded_test(info); |
851b7e16 | 1035 | #endif |
e03e93a9 AS |
1036 | } |
1037 | /* when compiled-in wait for drivers to load first */ | |
1038 | late_initcall(dmatest_init); | |
1039 | ||
1040 | static void __exit dmatest_exit(void) | |
1041 | { | |
1042 | struct dmatest_info *info = &test_info; | |
1043 | ||
851b7e16 | 1044 | debugfs_remove_recursive(info->root); |
e03e93a9 AS |
1045 | stop_threaded_test(info); |
1046 | } | |
4a776f0a HS |
1047 | module_exit(dmatest_exit); |
1048 | ||
e05503ef | 1049 | MODULE_AUTHOR("Haavard Skinnemoen (Atmel)"); |
4a776f0a | 1050 | MODULE_LICENSE("GPL v2"); |