Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 1 | /* |
| 2 | * DMA Engine test module |
| 3 | * |
| 4 | * Copyright (C) 2007 Atmel Corporation |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 5 | * Copyright (C) 2013 Intel Corporation |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 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 | */ |
Dan Williams | 872f05c | 2013-11-06 16:29:58 -0800 | [diff] [blame^] | 11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 12 | |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 13 | #include <linux/delay.h> |
Alexey Dobriyan | b7f080c | 2011-06-16 11:01:34 +0000 | [diff] [blame] | 14 | #include <linux/dma-mapping.h> |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 15 | #include <linux/dmaengine.h> |
Guennadi Liakhovetski | 981ed70 | 2011-08-18 16:50:51 +0200 | [diff] [blame] | 16 | #include <linux/freezer.h> |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 17 | #include <linux/init.h> |
| 18 | #include <linux/kthread.h> |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/moduleparam.h> |
| 21 | #include <linux/random.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 22 | #include <linux/slab.h> |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 23 | #include <linux/wait.h> |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 24 | #include <linux/ctype.h> |
| 25 | #include <linux/debugfs.h> |
| 26 | #include <linux/uaccess.h> |
| 27 | #include <linux/seq_file.h> |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 28 | |
| 29 | static unsigned int test_buf_size = 16384; |
Andy Shevchenko | a6c268d | 2013-07-23 18:36:46 +0300 | [diff] [blame] | 30 | module_param(test_buf_size, uint, S_IRUGO | S_IWUSR); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 31 | MODULE_PARM_DESC(test_buf_size, "Size of the memcpy test buffer"); |
| 32 | |
Kay Sievers | 06190d8 | 2008-11-11 13:12:33 -0700 | [diff] [blame] | 33 | static char test_channel[20]; |
Andy Shevchenko | a6c268d | 2013-07-23 18:36:46 +0300 | [diff] [blame] | 34 | module_param_string(channel, test_channel, sizeof(test_channel), |
| 35 | S_IRUGO | S_IWUSR); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 36 | MODULE_PARM_DESC(channel, "Bus ID of the channel to test (default: any)"); |
| 37 | |
Kay Sievers | 06190d8 | 2008-11-11 13:12:33 -0700 | [diff] [blame] | 38 | static char test_device[20]; |
Andy Shevchenko | a6c268d | 2013-07-23 18:36:46 +0300 | [diff] [blame] | 39 | module_param_string(device, test_device, sizeof(test_device), |
| 40 | S_IRUGO | S_IWUSR); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 41 | MODULE_PARM_DESC(device, "Bus ID of the DMA Engine to test (default: any)"); |
| 42 | |
| 43 | static unsigned int threads_per_chan = 1; |
Andy Shevchenko | a6c268d | 2013-07-23 18:36:46 +0300 | [diff] [blame] | 44 | module_param(threads_per_chan, uint, S_IRUGO | S_IWUSR); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 45 | MODULE_PARM_DESC(threads_per_chan, |
| 46 | "Number of threads to start per channel (default: 1)"); |
| 47 | |
| 48 | static unsigned int max_channels; |
Andy Shevchenko | a6c268d | 2013-07-23 18:36:46 +0300 | [diff] [blame] | 49 | module_param(max_channels, uint, S_IRUGO | S_IWUSR); |
Dan Williams | 33df8ca | 2009-01-06 11:38:15 -0700 | [diff] [blame] | 50 | MODULE_PARM_DESC(max_channels, |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 51 | "Maximum number of channels to use (default: all)"); |
| 52 | |
Nicolas Ferre | 0a2ff57d | 2009-07-03 19:26:51 +0200 | [diff] [blame] | 53 | static unsigned int iterations; |
Andy Shevchenko | a6c268d | 2013-07-23 18:36:46 +0300 | [diff] [blame] | 54 | module_param(iterations, uint, S_IRUGO | S_IWUSR); |
Nicolas Ferre | 0a2ff57d | 2009-07-03 19:26:51 +0200 | [diff] [blame] | 55 | MODULE_PARM_DESC(iterations, |
| 56 | "Iterations before stopping test (default: infinite)"); |
| 57 | |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 58 | static unsigned int xor_sources = 3; |
Andy Shevchenko | a6c268d | 2013-07-23 18:36:46 +0300 | [diff] [blame] | 59 | module_param(xor_sources, uint, S_IRUGO | S_IWUSR); |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 60 | MODULE_PARM_DESC(xor_sources, |
| 61 | "Number of xor source buffers (default: 3)"); |
| 62 | |
Dan Williams | 58691d6 | 2009-08-29 19:09:27 -0700 | [diff] [blame] | 63 | static unsigned int pq_sources = 3; |
Andy Shevchenko | a6c268d | 2013-07-23 18:36:46 +0300 | [diff] [blame] | 64 | module_param(pq_sources, uint, S_IRUGO | S_IWUSR); |
Dan Williams | 58691d6 | 2009-08-29 19:09:27 -0700 | [diff] [blame] | 65 | MODULE_PARM_DESC(pq_sources, |
| 66 | "Number of p+q source buffers (default: 3)"); |
| 67 | |
Viresh Kumar | d42efe6 | 2011-03-22 17:27:25 +0530 | [diff] [blame] | 68 | static int timeout = 3000; |
Andy Shevchenko | a6c268d | 2013-07-23 18:36:46 +0300 | [diff] [blame] | 69 | module_param(timeout, uint, S_IRUGO | S_IWUSR); |
Joe Perches | 85ee7a1 | 2011-04-23 20:38:19 -0700 | [diff] [blame] | 70 | MODULE_PARM_DESC(timeout, "Transfer Timeout in msec (default: 3000), " |
| 71 | "Pass -1 for infinite timeout"); |
Viresh Kumar | d42efe6 | 2011-03-22 17:27:25 +0530 | [diff] [blame] | 72 | |
Andy Shevchenko | 74b5c07 | 2013-03-04 11:09:32 +0200 | [diff] [blame] | 73 | /* Maximum amount of mismatched bytes in buffer to print */ |
| 74 | #define MAX_ERROR_COUNT 32 |
| 75 | |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 76 | /* |
| 77 | * Initialization patterns. All bytes in the source buffer has bit 7 |
| 78 | * set, all bytes in the destination buffer has bit 7 cleared. |
| 79 | * |
| 80 | * Bit 6 is set for all bytes which are to be copied by the DMA |
| 81 | * engine. Bit 5 is set for all bytes which are to be overwritten by |
| 82 | * the DMA engine. |
| 83 | * |
| 84 | * The remaining bits are the inverse of a counter which increments by |
| 85 | * one for each byte address. |
| 86 | */ |
| 87 | #define PATTERN_SRC 0x80 |
| 88 | #define PATTERN_DST 0x00 |
| 89 | #define PATTERN_COPY 0x40 |
| 90 | #define PATTERN_OVERWRITE 0x20 |
| 91 | #define PATTERN_COUNT_MASK 0x1f |
| 92 | |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 93 | struct dmatest_info; |
| 94 | |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 95 | struct dmatest_thread { |
| 96 | struct list_head node; |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 97 | struct dmatest_info *info; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 98 | struct task_struct *task; |
| 99 | struct dma_chan *chan; |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 100 | u8 **srcs; |
| 101 | u8 **dsts; |
| 102 | enum dma_transaction_type type; |
Andy Shevchenko | 3e5ccd8 | 2013-03-04 11:09:31 +0200 | [diff] [blame] | 103 | bool done; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 104 | }; |
| 105 | |
| 106 | struct dmatest_chan { |
| 107 | struct list_head node; |
| 108 | struct dma_chan *chan; |
| 109 | struct list_head threads; |
| 110 | }; |
| 111 | |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 112 | /** |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 113 | * struct dmatest_params - test parameters. |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 114 | * @buf_size: size of the memcpy test buffer |
| 115 | * @channel: bus ID of the channel to test |
| 116 | * @device: bus ID of the DMA Engine to test |
| 117 | * @threads_per_chan: number of threads to start per channel |
| 118 | * @max_channels: maximum number of channels to use |
| 119 | * @iterations: iterations before stopping test |
| 120 | * @xor_sources: number of xor source buffers |
| 121 | * @pq_sources: number of p+q source buffers |
| 122 | * @timeout: transfer timeout in msec, -1 for infinite timeout |
| 123 | */ |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 124 | struct dmatest_params { |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 125 | unsigned int buf_size; |
| 126 | char channel[20]; |
| 127 | char device[20]; |
| 128 | unsigned int threads_per_chan; |
| 129 | unsigned int max_channels; |
| 130 | unsigned int iterations; |
| 131 | unsigned int xor_sources; |
| 132 | unsigned int pq_sources; |
| 133 | int timeout; |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 134 | }; |
| 135 | |
| 136 | /** |
| 137 | * struct dmatest_info - test information. |
| 138 | * @params: test parameters |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 139 | * @lock: access protection to the fields of this structure |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 140 | */ |
| 141 | struct dmatest_info { |
| 142 | /* Test parameters */ |
| 143 | struct dmatest_params params; |
Andy Shevchenko | 838cc70 | 2013-03-04 11:09:28 +0200 | [diff] [blame] | 144 | |
| 145 | /* Internal state */ |
| 146 | struct list_head channels; |
| 147 | unsigned int nr_channels; |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 148 | struct mutex lock; |
| 149 | |
| 150 | /* debugfs related stuff */ |
| 151 | struct dentry *root; |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 152 | }; |
| 153 | |
| 154 | static struct dmatest_info test_info; |
| 155 | |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 156 | static bool dmatest_match_channel(struct dmatest_params *params, |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 157 | struct dma_chan *chan) |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 158 | { |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 159 | if (params->channel[0] == '\0') |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 160 | return true; |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 161 | return strcmp(dma_chan_name(chan), params->channel) == 0; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 162 | } |
| 163 | |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 164 | static bool dmatest_match_device(struct dmatest_params *params, |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 165 | struct dma_device *device) |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 166 | { |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 167 | if (params->device[0] == '\0') |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 168 | return true; |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 169 | return strcmp(dev_name(device->dev), params->device) == 0; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 170 | } |
| 171 | |
| 172 | static unsigned long dmatest_random(void) |
| 173 | { |
| 174 | unsigned long buf; |
| 175 | |
| 176 | get_random_bytes(&buf, sizeof(buf)); |
| 177 | return buf; |
| 178 | } |
| 179 | |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 180 | static void dmatest_init_srcs(u8 **bufs, unsigned int start, unsigned int len, |
| 181 | unsigned int buf_size) |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 182 | { |
| 183 | unsigned int i; |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 184 | u8 *buf; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 185 | |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 186 | for (; (buf = *bufs); bufs++) { |
| 187 | for (i = 0; i < start; i++) |
| 188 | buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK); |
| 189 | for ( ; i < start + len; i++) |
| 190 | buf[i] = PATTERN_SRC | PATTERN_COPY |
Joe Perches | c019894 | 2009-06-28 09:26:21 -0700 | [diff] [blame] | 191 | | (~i & PATTERN_COUNT_MASK); |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 192 | for ( ; i < buf_size; i++) |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 193 | buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK); |
| 194 | buf++; |
| 195 | } |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 196 | } |
| 197 | |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 198 | static void dmatest_init_dsts(u8 **bufs, unsigned int start, unsigned int len, |
| 199 | unsigned int buf_size) |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 200 | { |
| 201 | unsigned int i; |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 202 | u8 *buf; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 203 | |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 204 | for (; (buf = *bufs); bufs++) { |
| 205 | for (i = 0; i < start; i++) |
| 206 | buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK); |
| 207 | for ( ; i < start + len; i++) |
| 208 | buf[i] = PATTERN_DST | PATTERN_OVERWRITE |
| 209 | | (~i & PATTERN_COUNT_MASK); |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 210 | for ( ; i < buf_size; i++) |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 211 | buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK); |
| 212 | } |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 213 | } |
| 214 | |
Dan Williams | 7b61017 | 2013-11-06 16:29:57 -0800 | [diff] [blame] | 215 | static void dmatest_mismatch(u8 actual, u8 pattern, unsigned int index, |
| 216 | unsigned int counter, bool is_srcbuf) |
| 217 | { |
| 218 | u8 diff = actual ^ pattern; |
| 219 | u8 expected = pattern | (~counter & PATTERN_COUNT_MASK); |
| 220 | const char *thread_name = current->comm; |
| 221 | |
| 222 | if (is_srcbuf) |
| 223 | pr_warn("%s: srcbuf[0x%x] overwritten! Expected %02x, got %02x\n", |
| 224 | thread_name, index, expected, actual); |
| 225 | else if ((pattern & PATTERN_COPY) |
| 226 | && (diff & (PATTERN_COPY | PATTERN_OVERWRITE))) |
| 227 | pr_warn("%s: dstbuf[0x%x] not copied! Expected %02x, got %02x\n", |
| 228 | thread_name, index, expected, actual); |
| 229 | else if (diff & PATTERN_SRC) |
| 230 | pr_warn("%s: dstbuf[0x%x] was copied! Expected %02x, got %02x\n", |
| 231 | thread_name, index, expected, actual); |
| 232 | else |
| 233 | pr_warn("%s: dstbuf[0x%x] mismatch! Expected %02x, got %02x\n", |
| 234 | thread_name, index, expected, actual); |
| 235 | } |
| 236 | |
| 237 | static unsigned int dmatest_verify(u8 **bufs, unsigned int start, |
| 238 | unsigned int end, unsigned int counter, u8 pattern, |
| 239 | bool is_srcbuf) |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 240 | { |
| 241 | unsigned int i; |
| 242 | unsigned int error_count = 0; |
| 243 | u8 actual; |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 244 | u8 expected; |
| 245 | u8 *buf; |
| 246 | unsigned int counter_orig = counter; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 247 | |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 248 | for (; (buf = *bufs); bufs++) { |
| 249 | counter = counter_orig; |
| 250 | for (i = start; i < end; i++) { |
| 251 | actual = buf[i]; |
| 252 | expected = pattern | (~counter & PATTERN_COUNT_MASK); |
| 253 | if (actual != expected) { |
Dan Williams | 7b61017 | 2013-11-06 16:29:57 -0800 | [diff] [blame] | 254 | if (error_count < MAX_ERROR_COUNT) |
| 255 | dmatest_mismatch(actual, pattern, i, |
| 256 | counter, is_srcbuf); |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 257 | error_count++; |
| 258 | } |
| 259 | counter++; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 260 | } |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 261 | } |
| 262 | |
Andy Shevchenko | 74b5c07 | 2013-03-04 11:09:32 +0200 | [diff] [blame] | 263 | if (error_count > MAX_ERROR_COUNT) |
Dan Williams | 7b61017 | 2013-11-06 16:29:57 -0800 | [diff] [blame] | 264 | pr_warn("%s: %u errors suppressed\n", |
Andy Shevchenko | 74b5c07 | 2013-03-04 11:09:32 +0200 | [diff] [blame] | 265 | current->comm, error_count - MAX_ERROR_COUNT); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 266 | |
| 267 | return error_count; |
| 268 | } |
| 269 | |
Tejun Heo | adfa543 | 2011-11-23 09:28:16 -0800 | [diff] [blame] | 270 | /* poor man's completion - we want to use wait_event_freezable() on it */ |
| 271 | struct dmatest_done { |
| 272 | bool done; |
| 273 | wait_queue_head_t *wait; |
| 274 | }; |
| 275 | |
| 276 | static void dmatest_callback(void *arg) |
Dan Williams | e44e0aa | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 277 | { |
Tejun Heo | adfa543 | 2011-11-23 09:28:16 -0800 | [diff] [blame] | 278 | struct dmatest_done *done = arg; |
| 279 | |
| 280 | done->done = true; |
| 281 | wake_up_all(done->wait); |
Dan Williams | e44e0aa | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 282 | } |
| 283 | |
Andy Shevchenko | 632fd28 | 2012-12-17 15:59:52 -0800 | [diff] [blame] | 284 | static inline void unmap_src(struct device *dev, dma_addr_t *addr, size_t len, |
| 285 | unsigned int count) |
| 286 | { |
| 287 | while (count--) |
| 288 | dma_unmap_single(dev, addr[count], len, DMA_TO_DEVICE); |
| 289 | } |
| 290 | |
| 291 | static inline void unmap_dst(struct device *dev, dma_addr_t *addr, size_t len, |
| 292 | unsigned int count) |
| 293 | { |
| 294 | while (count--) |
| 295 | dma_unmap_single(dev, addr[count], len, DMA_BIDIRECTIONAL); |
| 296 | } |
| 297 | |
Akinobu Mita | 8be9e32b | 2012-10-28 00:49:32 +0900 | [diff] [blame] | 298 | static unsigned int min_odd(unsigned int x, unsigned int y) |
| 299 | { |
| 300 | unsigned int val = min(x, y); |
| 301 | |
| 302 | return val % 2 ? val : val - 1; |
| 303 | } |
| 304 | |
Dan Williams | 872f05c | 2013-11-06 16:29:58 -0800 | [diff] [blame^] | 305 | static void result(const char *err, unsigned int n, unsigned int src_off, |
| 306 | unsigned int dst_off, unsigned int len, unsigned long data) |
Andy Shevchenko | 95019c8 | 2013-03-04 11:09:33 +0200 | [diff] [blame] | 307 | { |
Dan Williams | 872f05c | 2013-11-06 16:29:58 -0800 | [diff] [blame^] | 308 | pr_info("%s: result #%u: '%s' with src_off=0x%x ""dst_off=0x%x len=0x%x (%lu)", |
| 309 | current->comm, n, err, src_off, dst_off, len, data); |
Andy Shevchenko | 95019c8 | 2013-03-04 11:09:33 +0200 | [diff] [blame] | 310 | } |
| 311 | |
Dan Williams | 872f05c | 2013-11-06 16:29:58 -0800 | [diff] [blame^] | 312 | static void dbg_result(const char *err, unsigned int n, unsigned int src_off, |
| 313 | unsigned int dst_off, unsigned int len, |
| 314 | unsigned long data) |
Andy Shevchenko | 95019c8 | 2013-03-04 11:09:33 +0200 | [diff] [blame] | 315 | { |
Dan Williams | 872f05c | 2013-11-06 16:29:58 -0800 | [diff] [blame^] | 316 | pr_debug("%s: result #%u: '%s' with src_off=0x%x ""dst_off=0x%x len=0x%x (%lu)", |
| 317 | current->comm, n, err, src_off, dst_off, len, data); |
Andy Shevchenko | 95019c8 | 2013-03-04 11:09:33 +0200 | [diff] [blame] | 318 | } |
| 319 | |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 320 | /* |
| 321 | * This function repeatedly tests DMA transfers of various lengths and |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 322 | * offsets for a given operation type until it is told to exit by |
| 323 | * kthread_stop(). There may be multiple threads running this function |
| 324 | * in parallel for a single channel, and there may be multiple channels |
| 325 | * being tested in parallel. |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 326 | * |
| 327 | * Before each test, the source and destination buffer is initialized |
| 328 | * with a known pattern. This pattern is different depending on |
| 329 | * whether it's in an area which is supposed to be copied or |
| 330 | * overwritten, and different in the source and destination buffers. |
| 331 | * So if the DMA engine doesn't copy exactly what we tell it to copy, |
| 332 | * we'll notice. |
| 333 | */ |
| 334 | static int dmatest_func(void *data) |
| 335 | { |
Tejun Heo | adfa543 | 2011-11-23 09:28:16 -0800 | [diff] [blame] | 336 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(done_wait); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 337 | struct dmatest_thread *thread = data; |
Tejun Heo | adfa543 | 2011-11-23 09:28:16 -0800 | [diff] [blame] | 338 | struct dmatest_done done = { .wait = &done_wait }; |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 339 | struct dmatest_info *info; |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 340 | struct dmatest_params *params; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 341 | struct dma_chan *chan; |
Akinobu Mita | 8be9e32b | 2012-10-28 00:49:32 +0900 | [diff] [blame] | 342 | struct dma_device *dev; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 343 | unsigned int src_off, dst_off, len; |
| 344 | unsigned int error_count; |
| 345 | unsigned int failed_tests = 0; |
| 346 | unsigned int total_tests = 0; |
| 347 | dma_cookie_t cookie; |
| 348 | enum dma_status status; |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 349 | enum dma_ctrl_flags flags; |
Andy Shevchenko | 945b5af | 2013-03-04 11:09:26 +0200 | [diff] [blame] | 350 | u8 *pq_coefs = NULL; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 351 | int ret; |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 352 | int src_cnt; |
| 353 | int dst_cnt; |
| 354 | int i; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 355 | |
Tejun Heo | adfa543 | 2011-11-23 09:28:16 -0800 | [diff] [blame] | 356 | set_freezable(); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 357 | |
| 358 | ret = -ENOMEM; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 359 | |
| 360 | smp_rmb(); |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 361 | info = thread->info; |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 362 | params = &info->params; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 363 | chan = thread->chan; |
Akinobu Mita | 8be9e32b | 2012-10-28 00:49:32 +0900 | [diff] [blame] | 364 | dev = chan->device; |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 365 | if (thread->type == DMA_MEMCPY) |
| 366 | src_cnt = dst_cnt = 1; |
| 367 | else if (thread->type == DMA_XOR) { |
Akinobu Mita | 8be9e32b | 2012-10-28 00:49:32 +0900 | [diff] [blame] | 368 | /* force odd to ensure dst = src */ |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 369 | src_cnt = min_odd(params->xor_sources | 1, dev->max_xor); |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 370 | dst_cnt = 1; |
Dan Williams | 58691d6 | 2009-08-29 19:09:27 -0700 | [diff] [blame] | 371 | } else if (thread->type == DMA_PQ) { |
Akinobu Mita | 8be9e32b | 2012-10-28 00:49:32 +0900 | [diff] [blame] | 372 | /* force odd to ensure dst = src */ |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 373 | src_cnt = min_odd(params->pq_sources | 1, dma_maxpq(dev, 0)); |
Dan Williams | 58691d6 | 2009-08-29 19:09:27 -0700 | [diff] [blame] | 374 | dst_cnt = 2; |
Andy Shevchenko | 945b5af | 2013-03-04 11:09:26 +0200 | [diff] [blame] | 375 | |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 376 | pq_coefs = kmalloc(params->pq_sources+1, GFP_KERNEL); |
Andy Shevchenko | 945b5af | 2013-03-04 11:09:26 +0200 | [diff] [blame] | 377 | if (!pq_coefs) |
| 378 | goto err_thread_type; |
| 379 | |
Anatolij Gustschin | 94de648 | 2010-02-15 22:35:23 +0100 | [diff] [blame] | 380 | for (i = 0; i < src_cnt; i++) |
Dan Williams | 58691d6 | 2009-08-29 19:09:27 -0700 | [diff] [blame] | 381 | pq_coefs[i] = 1; |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 382 | } else |
Andy Shevchenko | 945b5af | 2013-03-04 11:09:26 +0200 | [diff] [blame] | 383 | goto err_thread_type; |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 384 | |
| 385 | thread->srcs = kcalloc(src_cnt+1, sizeof(u8 *), GFP_KERNEL); |
| 386 | if (!thread->srcs) |
| 387 | goto err_srcs; |
| 388 | for (i = 0; i < src_cnt; i++) { |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 389 | thread->srcs[i] = kmalloc(params->buf_size, GFP_KERNEL); |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 390 | if (!thread->srcs[i]) |
| 391 | goto err_srcbuf; |
| 392 | } |
| 393 | thread->srcs[i] = NULL; |
| 394 | |
| 395 | thread->dsts = kcalloc(dst_cnt+1, sizeof(u8 *), GFP_KERNEL); |
| 396 | if (!thread->dsts) |
| 397 | goto err_dsts; |
| 398 | for (i = 0; i < dst_cnt; i++) { |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 399 | thread->dsts[i] = kmalloc(params->buf_size, GFP_KERNEL); |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 400 | if (!thread->dsts[i]) |
| 401 | goto err_dstbuf; |
| 402 | } |
| 403 | thread->dsts[i] = NULL; |
| 404 | |
Dan Williams | e44e0aa | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 405 | set_user_nice(current, 10); |
| 406 | |
Ira Snyder | b203bd3 | 2011-03-03 07:54:53 +0000 | [diff] [blame] | 407 | /* |
Bartlomiej Zolnierkiewicz | d1cab34 | 2013-10-18 19:35:21 +0200 | [diff] [blame] | 408 | * src and dst buffers are freed by ourselves below |
Ira Snyder | b203bd3 | 2011-03-03 07:54:53 +0000 | [diff] [blame] | 409 | */ |
Bartlomiej Zolnierkiewicz | 0776ae7 | 2013-10-18 19:35:33 +0200 | [diff] [blame] | 410 | flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 411 | |
Nicolas Ferre | 0a2ff57d | 2009-07-03 19:26:51 +0200 | [diff] [blame] | 412 | while (!kthread_should_stop() |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 413 | && !(params->iterations && total_tests >= params->iterations)) { |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 414 | struct dma_async_tx_descriptor *tx = NULL; |
| 415 | dma_addr_t dma_srcs[src_cnt]; |
| 416 | dma_addr_t dma_dsts[dst_cnt]; |
Dan Williams | 83544ae | 2009-09-08 17:42:53 -0700 | [diff] [blame] | 417 | u8 align = 0; |
Atsushi Nemoto | d86be86 | 2009-01-13 09:22:20 -0700 | [diff] [blame] | 418 | |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 419 | total_tests++; |
| 420 | |
Dan Williams | 83544ae | 2009-09-08 17:42:53 -0700 | [diff] [blame] | 421 | /* honor alignment restrictions */ |
| 422 | if (thread->type == DMA_MEMCPY) |
| 423 | align = dev->copy_align; |
| 424 | else if (thread->type == DMA_XOR) |
| 425 | align = dev->xor_align; |
| 426 | else if (thread->type == DMA_PQ) |
| 427 | align = dev->pq_align; |
| 428 | |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 429 | if (1 << align > params->buf_size) { |
Guennadi Liakhovetski | cfe4f27 | 2009-12-04 19:44:48 +0100 | [diff] [blame] | 430 | pr_err("%u-byte buffer too small for %d-byte alignment\n", |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 431 | params->buf_size, 1 << align); |
Guennadi Liakhovetski | cfe4f27 | 2009-12-04 19:44:48 +0100 | [diff] [blame] | 432 | break; |
| 433 | } |
| 434 | |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 435 | len = dmatest_random() % params->buf_size + 1; |
Dan Williams | 83544ae | 2009-09-08 17:42:53 -0700 | [diff] [blame] | 436 | len = (len >> align) << align; |
Guennadi Liakhovetski | cfe4f27 | 2009-12-04 19:44:48 +0100 | [diff] [blame] | 437 | if (!len) |
| 438 | len = 1 << align; |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 439 | src_off = dmatest_random() % (params->buf_size - len + 1); |
| 440 | dst_off = dmatest_random() % (params->buf_size - len + 1); |
Guennadi Liakhovetski | cfe4f27 | 2009-12-04 19:44:48 +0100 | [diff] [blame] | 441 | |
Dan Williams | 83544ae | 2009-09-08 17:42:53 -0700 | [diff] [blame] | 442 | src_off = (src_off >> align) << align; |
| 443 | dst_off = (dst_off >> align) << align; |
| 444 | |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 445 | dmatest_init_srcs(thread->srcs, src_off, len, params->buf_size); |
| 446 | dmatest_init_dsts(thread->dsts, dst_off, len, params->buf_size); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 447 | |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 448 | for (i = 0; i < src_cnt; i++) { |
| 449 | u8 *buf = thread->srcs[i] + src_off; |
| 450 | |
| 451 | dma_srcs[i] = dma_map_single(dev->dev, buf, len, |
| 452 | DMA_TO_DEVICE); |
Andy Shevchenko | afde3be | 2012-12-17 15:59:53 -0800 | [diff] [blame] | 453 | ret = dma_mapping_error(dev->dev, dma_srcs[i]); |
| 454 | if (ret) { |
| 455 | unmap_src(dev->dev, dma_srcs, len, i); |
Dan Williams | 872f05c | 2013-11-06 16:29:58 -0800 | [diff] [blame^] | 456 | result("src mapping error", total_tests, |
| 457 | src_off, dst_off, len, ret); |
Andy Shevchenko | afde3be | 2012-12-17 15:59:53 -0800 | [diff] [blame] | 458 | failed_tests++; |
| 459 | continue; |
| 460 | } |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 461 | } |
Atsushi Nemoto | d86be86 | 2009-01-13 09:22:20 -0700 | [diff] [blame] | 462 | /* map with DMA_BIDIRECTIONAL to force writeback/invalidate */ |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 463 | for (i = 0; i < dst_cnt; i++) { |
| 464 | dma_dsts[i] = dma_map_single(dev->dev, thread->dsts[i], |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 465 | params->buf_size, |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 466 | DMA_BIDIRECTIONAL); |
Andy Shevchenko | afde3be | 2012-12-17 15:59:53 -0800 | [diff] [blame] | 467 | ret = dma_mapping_error(dev->dev, dma_dsts[i]); |
| 468 | if (ret) { |
| 469 | unmap_src(dev->dev, dma_srcs, len, src_cnt); |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 470 | unmap_dst(dev->dev, dma_dsts, params->buf_size, |
| 471 | i); |
Dan Williams | 872f05c | 2013-11-06 16:29:58 -0800 | [diff] [blame^] | 472 | result("dst mapping error", total_tests, |
| 473 | src_off, dst_off, len, ret); |
Andy Shevchenko | afde3be | 2012-12-17 15:59:53 -0800 | [diff] [blame] | 474 | failed_tests++; |
| 475 | continue; |
| 476 | } |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 477 | } |
Atsushi Nemoto | d86be86 | 2009-01-13 09:22:20 -0700 | [diff] [blame] | 478 | |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 479 | if (thread->type == DMA_MEMCPY) |
| 480 | tx = dev->device_prep_dma_memcpy(chan, |
| 481 | dma_dsts[0] + dst_off, |
| 482 | dma_srcs[0], len, |
| 483 | flags); |
| 484 | else if (thread->type == DMA_XOR) |
| 485 | tx = dev->device_prep_dma_xor(chan, |
| 486 | dma_dsts[0] + dst_off, |
Dan Williams | 67b9124 | 2010-02-28 22:20:18 -0700 | [diff] [blame] | 487 | dma_srcs, src_cnt, |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 488 | len, flags); |
Dan Williams | 58691d6 | 2009-08-29 19:09:27 -0700 | [diff] [blame] | 489 | else if (thread->type == DMA_PQ) { |
| 490 | dma_addr_t dma_pq[dst_cnt]; |
| 491 | |
| 492 | for (i = 0; i < dst_cnt; i++) |
| 493 | dma_pq[i] = dma_dsts[i] + dst_off; |
| 494 | tx = dev->device_prep_dma_pq(chan, dma_pq, dma_srcs, |
Anatolij Gustschin | 94de648 | 2010-02-15 22:35:23 +0100 | [diff] [blame] | 495 | src_cnt, pq_coefs, |
Dan Williams | 58691d6 | 2009-08-29 19:09:27 -0700 | [diff] [blame] | 496 | len, flags); |
| 497 | } |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 498 | |
Atsushi Nemoto | d86be86 | 2009-01-13 09:22:20 -0700 | [diff] [blame] | 499 | if (!tx) { |
Andy Shevchenko | 632fd28 | 2012-12-17 15:59:52 -0800 | [diff] [blame] | 500 | unmap_src(dev->dev, dma_srcs, len, src_cnt); |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 501 | unmap_dst(dev->dev, dma_dsts, params->buf_size, |
| 502 | dst_cnt); |
Dan Williams | 872f05c | 2013-11-06 16:29:58 -0800 | [diff] [blame^] | 503 | result("prep error", total_tests, src_off, |
| 504 | dst_off, len, ret); |
Atsushi Nemoto | d86be86 | 2009-01-13 09:22:20 -0700 | [diff] [blame] | 505 | msleep(100); |
| 506 | failed_tests++; |
| 507 | continue; |
| 508 | } |
Dan Williams | e44e0aa | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 509 | |
Tejun Heo | adfa543 | 2011-11-23 09:28:16 -0800 | [diff] [blame] | 510 | done.done = false; |
Dan Williams | e44e0aa | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 511 | tx->callback = dmatest_callback; |
Tejun Heo | adfa543 | 2011-11-23 09:28:16 -0800 | [diff] [blame] | 512 | tx->callback_param = &done; |
Atsushi Nemoto | d86be86 | 2009-01-13 09:22:20 -0700 | [diff] [blame] | 513 | cookie = tx->tx_submit(tx); |
| 514 | |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 515 | if (dma_submit_error(cookie)) { |
Dan Williams | 872f05c | 2013-11-06 16:29:58 -0800 | [diff] [blame^] | 516 | result("submit error", total_tests, src_off, |
| 517 | dst_off, len, ret); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 518 | msleep(100); |
| 519 | failed_tests++; |
| 520 | continue; |
| 521 | } |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 522 | dma_async_issue_pending(chan); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 523 | |
Andy Shevchenko | bcc567e | 2013-05-23 14:29:53 +0300 | [diff] [blame] | 524 | wait_event_freezable_timeout(done_wait, done.done, |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 525 | msecs_to_jiffies(params->timeout)); |
Guennadi Liakhovetski | 981ed70 | 2011-08-18 16:50:51 +0200 | [diff] [blame] | 526 | |
Dan Williams | e44e0aa | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 527 | status = dma_async_is_tx_complete(chan, cookie, NULL, NULL); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 528 | |
Tejun Heo | adfa543 | 2011-11-23 09:28:16 -0800 | [diff] [blame] | 529 | if (!done.done) { |
| 530 | /* |
| 531 | * We're leaving the timed out dma operation with |
| 532 | * dangling pointer to done_wait. To make this |
| 533 | * correct, we'll need to allocate wait_done for |
| 534 | * each test iteration and perform "who's gonna |
| 535 | * free it this time?" dancing. For now, just |
| 536 | * leave it dangling. |
| 537 | */ |
Dan Williams | 872f05c | 2013-11-06 16:29:58 -0800 | [diff] [blame^] | 538 | result("test timed out", total_tests, src_off, dst_off, |
| 539 | len, 0); |
Dan Williams | e44e0aa | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 540 | failed_tests++; |
| 541 | continue; |
| 542 | } else if (status != DMA_SUCCESS) { |
Dan Williams | 872f05c | 2013-11-06 16:29:58 -0800 | [diff] [blame^] | 543 | result(status == DMA_ERROR ? |
| 544 | "completion error status" : |
| 545 | "completion busy status", total_tests, src_off, |
| 546 | dst_off, len, ret); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 547 | failed_tests++; |
| 548 | continue; |
| 549 | } |
Dan Williams | e44e0aa | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 550 | |
Bartlomiej Zolnierkiewicz | d1cab34 | 2013-10-18 19:35:21 +0200 | [diff] [blame] | 551 | /* Unmap by myself */ |
| 552 | unmap_src(dev->dev, dma_srcs, len, src_cnt); |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 553 | unmap_dst(dev->dev, dma_dsts, params->buf_size, dst_cnt); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 554 | |
| 555 | error_count = 0; |
| 556 | |
Dan Williams | 872f05c | 2013-11-06 16:29:58 -0800 | [diff] [blame^] | 557 | pr_debug("%s: verifying source buffer...\n", current->comm); |
Dan Williams | 7b61017 | 2013-11-06 16:29:57 -0800 | [diff] [blame] | 558 | error_count += dmatest_verify(thread->srcs, 0, src_off, |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 559 | 0, PATTERN_SRC, true); |
Dan Williams | 7b61017 | 2013-11-06 16:29:57 -0800 | [diff] [blame] | 560 | error_count += dmatest_verify(thread->srcs, src_off, |
| 561 | src_off + len, src_off, |
| 562 | PATTERN_SRC | PATTERN_COPY, true); |
| 563 | error_count += dmatest_verify(thread->srcs, src_off + len, |
| 564 | params->buf_size, src_off + len, |
| 565 | PATTERN_SRC, true); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 566 | |
Dan Williams | 872f05c | 2013-11-06 16:29:58 -0800 | [diff] [blame^] | 567 | pr_debug("%s: verifying dest buffer...\n", current->comm); |
Dan Williams | 7b61017 | 2013-11-06 16:29:57 -0800 | [diff] [blame] | 568 | error_count += dmatest_verify(thread->dsts, 0, dst_off, |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 569 | 0, PATTERN_DST, false); |
Dan Williams | 7b61017 | 2013-11-06 16:29:57 -0800 | [diff] [blame] | 570 | error_count += dmatest_verify(thread->dsts, dst_off, |
| 571 | dst_off + len, src_off, |
| 572 | PATTERN_SRC | PATTERN_COPY, false); |
| 573 | error_count += dmatest_verify(thread->dsts, dst_off + len, |
| 574 | params->buf_size, dst_off + len, |
| 575 | PATTERN_DST, false); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 576 | |
| 577 | if (error_count) { |
Dan Williams | 872f05c | 2013-11-06 16:29:58 -0800 | [diff] [blame^] | 578 | result("data error", total_tests, src_off, dst_off, |
| 579 | len, error_count); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 580 | failed_tests++; |
| 581 | } else { |
Dan Williams | 872f05c | 2013-11-06 16:29:58 -0800 | [diff] [blame^] | 582 | dbg_result("test passed", total_tests, src_off, dst_off, |
| 583 | len, 0); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 584 | } |
| 585 | } |
| 586 | |
| 587 | ret = 0; |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 588 | for (i = 0; thread->dsts[i]; i++) |
| 589 | kfree(thread->dsts[i]); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 590 | err_dstbuf: |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 591 | kfree(thread->dsts); |
| 592 | err_dsts: |
| 593 | for (i = 0; thread->srcs[i]; i++) |
| 594 | kfree(thread->srcs[i]); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 595 | err_srcbuf: |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 596 | kfree(thread->srcs); |
| 597 | err_srcs: |
Andy Shevchenko | 945b5af | 2013-03-04 11:09:26 +0200 | [diff] [blame] | 598 | kfree(pq_coefs); |
| 599 | err_thread_type: |
Dan Williams | 872f05c | 2013-11-06 16:29:58 -0800 | [diff] [blame^] | 600 | pr_info("%s: terminating after %u tests, %u failures (status %d)\n", |
| 601 | current->comm, total_tests, failed_tests, ret); |
Nicolas Ferre | 0a2ff57d | 2009-07-03 19:26:51 +0200 | [diff] [blame] | 602 | |
Viresh Kumar | 9704efa | 2011-07-29 16:21:57 +0530 | [diff] [blame] | 603 | /* terminate all transfers on specified channels */ |
Shiraz Hashim | 5e034f7 | 2012-11-09 15:26:29 +0000 | [diff] [blame] | 604 | if (ret) |
| 605 | dmaengine_terminate_all(chan); |
| 606 | |
Andy Shevchenko | 3e5ccd8 | 2013-03-04 11:09:31 +0200 | [diff] [blame] | 607 | thread->done = true; |
| 608 | |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 609 | if (params->iterations > 0) |
Nicolas Ferre | 0a2ff57d | 2009-07-03 19:26:51 +0200 | [diff] [blame] | 610 | while (!kthread_should_stop()) { |
Yong Zhang | b953df7 | 2010-02-05 21:52:37 +0800 | [diff] [blame] | 611 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wait_dmatest_exit); |
Nicolas Ferre | 0a2ff57d | 2009-07-03 19:26:51 +0200 | [diff] [blame] | 612 | interruptible_sleep_on(&wait_dmatest_exit); |
| 613 | } |
| 614 | |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 615 | return ret; |
| 616 | } |
| 617 | |
| 618 | static void dmatest_cleanup_channel(struct dmatest_chan *dtc) |
| 619 | { |
| 620 | struct dmatest_thread *thread; |
| 621 | struct dmatest_thread *_thread; |
| 622 | int ret; |
| 623 | |
| 624 | list_for_each_entry_safe(thread, _thread, &dtc->threads, node) { |
| 625 | ret = kthread_stop(thread->task); |
| 626 | pr_debug("dmatest: thread %s exited with status %d\n", |
| 627 | thread->task->comm, ret); |
| 628 | list_del(&thread->node); |
| 629 | kfree(thread); |
| 630 | } |
Viresh Kumar | 9704efa | 2011-07-29 16:21:57 +0530 | [diff] [blame] | 631 | |
| 632 | /* terminate all transfers on specified channels */ |
Jon Mason | 944ea4d | 2012-11-11 23:03:20 +0000 | [diff] [blame] | 633 | dmaengine_terminate_all(dtc->chan); |
Viresh Kumar | 9704efa | 2011-07-29 16:21:57 +0530 | [diff] [blame] | 634 | |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 635 | kfree(dtc); |
| 636 | } |
| 637 | |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 638 | static int dmatest_add_threads(struct dmatest_info *info, |
| 639 | struct dmatest_chan *dtc, enum dma_transaction_type type) |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 640 | { |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 641 | struct dmatest_params *params = &info->params; |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 642 | struct dmatest_thread *thread; |
| 643 | struct dma_chan *chan = dtc->chan; |
| 644 | char *op; |
| 645 | unsigned int i; |
| 646 | |
| 647 | if (type == DMA_MEMCPY) |
| 648 | op = "copy"; |
| 649 | else if (type == DMA_XOR) |
| 650 | op = "xor"; |
Dan Williams | 58691d6 | 2009-08-29 19:09:27 -0700 | [diff] [blame] | 651 | else if (type == DMA_PQ) |
| 652 | op = "pq"; |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 653 | else |
| 654 | return -EINVAL; |
| 655 | |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 656 | for (i = 0; i < params->threads_per_chan; i++) { |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 657 | thread = kzalloc(sizeof(struct dmatest_thread), GFP_KERNEL); |
| 658 | if (!thread) { |
| 659 | pr_warning("dmatest: No memory for %s-%s%u\n", |
| 660 | dma_chan_name(chan), op, i); |
| 661 | |
| 662 | break; |
| 663 | } |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 664 | thread->info = info; |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 665 | thread->chan = dtc->chan; |
| 666 | thread->type = type; |
| 667 | smp_wmb(); |
| 668 | thread->task = kthread_run(dmatest_func, thread, "%s-%s%u", |
| 669 | dma_chan_name(chan), op, i); |
| 670 | if (IS_ERR(thread->task)) { |
| 671 | pr_warning("dmatest: Failed to run thread %s-%s%u\n", |
| 672 | dma_chan_name(chan), op, i); |
| 673 | kfree(thread); |
| 674 | break; |
| 675 | } |
| 676 | |
| 677 | /* srcbuf and dstbuf are allocated by the thread itself */ |
| 678 | |
| 679 | list_add_tail(&thread->node, &dtc->threads); |
| 680 | } |
| 681 | |
| 682 | return i; |
| 683 | } |
| 684 | |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 685 | static int dmatest_add_channel(struct dmatest_info *info, |
| 686 | struct dma_chan *chan) |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 687 | { |
| 688 | struct dmatest_chan *dtc; |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 689 | struct dma_device *dma_dev = chan->device; |
| 690 | unsigned int thread_count = 0; |
Kulikov Vasiliy | b9033e6 | 2010-07-17 19:19:48 +0400 | [diff] [blame] | 691 | int cnt; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 692 | |
Andrew Morton | 6fdb8bd | 2008-09-19 04:16:23 -0700 | [diff] [blame] | 693 | dtc = kmalloc(sizeof(struct dmatest_chan), GFP_KERNEL); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 694 | if (!dtc) { |
Dan Williams | 41d5e59 | 2009-01-06 11:38:21 -0700 | [diff] [blame] | 695 | pr_warning("dmatest: No memory for %s\n", dma_chan_name(chan)); |
Dan Williams | 33df8ca | 2009-01-06 11:38:15 -0700 | [diff] [blame] | 696 | return -ENOMEM; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 697 | } |
| 698 | |
| 699 | dtc->chan = chan; |
| 700 | INIT_LIST_HEAD(&dtc->threads); |
| 701 | |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 702 | if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) { |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 703 | cnt = dmatest_add_threads(info, dtc, DMA_MEMCPY); |
Nicolas Ferre | f1aef8b | 2009-07-06 18:19:44 +0200 | [diff] [blame] | 704 | thread_count += cnt > 0 ? cnt : 0; |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 705 | } |
| 706 | if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) { |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 707 | cnt = dmatest_add_threads(info, dtc, DMA_XOR); |
Nicolas Ferre | f1aef8b | 2009-07-06 18:19:44 +0200 | [diff] [blame] | 708 | thread_count += cnt > 0 ? cnt : 0; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 709 | } |
Dan Williams | 58691d6 | 2009-08-29 19:09:27 -0700 | [diff] [blame] | 710 | if (dma_has_cap(DMA_PQ, dma_dev->cap_mask)) { |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 711 | cnt = dmatest_add_threads(info, dtc, DMA_PQ); |
Dr. David Alan Gilbert | d07a74a | 2011-08-25 16:13:55 -0700 | [diff] [blame] | 712 | thread_count += cnt > 0 ? cnt : 0; |
Dan Williams | 58691d6 | 2009-08-29 19:09:27 -0700 | [diff] [blame] | 713 | } |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 714 | |
Dan Williams | b54d5cb | 2009-03-25 09:13:25 -0700 | [diff] [blame] | 715 | pr_info("dmatest: Started %u threads using %s\n", |
| 716 | thread_count, dma_chan_name(chan)); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 717 | |
Andy Shevchenko | 838cc70 | 2013-03-04 11:09:28 +0200 | [diff] [blame] | 718 | list_add_tail(&dtc->node, &info->channels); |
| 719 | info->nr_channels++; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 720 | |
Dan Williams | 33df8ca | 2009-01-06 11:38:15 -0700 | [diff] [blame] | 721 | return 0; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 722 | } |
| 723 | |
Dan Williams | 7dd6025 | 2009-01-06 11:38:19 -0700 | [diff] [blame] | 724 | static bool filter(struct dma_chan *chan, void *param) |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 725 | { |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 726 | struct dmatest_params *params = param; |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 727 | |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 728 | if (!dmatest_match_channel(params, chan) || |
| 729 | !dmatest_match_device(params, chan->device)) |
Dan Williams | 7dd6025 | 2009-01-06 11:38:19 -0700 | [diff] [blame] | 730 | return false; |
Dan Williams | 33df8ca | 2009-01-06 11:38:15 -0700 | [diff] [blame] | 731 | else |
Dan Williams | 7dd6025 | 2009-01-06 11:38:19 -0700 | [diff] [blame] | 732 | return true; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 733 | } |
| 734 | |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 735 | static int __run_threaded_test(struct dmatest_info *info) |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 736 | { |
Dan Williams | 33df8ca | 2009-01-06 11:38:15 -0700 | [diff] [blame] | 737 | dma_cap_mask_t mask; |
| 738 | struct dma_chan *chan; |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 739 | struct dmatest_params *params = &info->params; |
Dan Williams | 33df8ca | 2009-01-06 11:38:15 -0700 | [diff] [blame] | 740 | int err = 0; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 741 | |
Dan Williams | 33df8ca | 2009-01-06 11:38:15 -0700 | [diff] [blame] | 742 | dma_cap_zero(mask); |
| 743 | dma_cap_set(DMA_MEMCPY, mask); |
| 744 | for (;;) { |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 745 | chan = dma_request_channel(mask, filter, params); |
Dan Williams | 33df8ca | 2009-01-06 11:38:15 -0700 | [diff] [blame] | 746 | if (chan) { |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 747 | err = dmatest_add_channel(info, chan); |
Dan Williams | c56c81a | 2009-04-08 15:08:23 -0700 | [diff] [blame] | 748 | if (err) { |
Dan Williams | 33df8ca | 2009-01-06 11:38:15 -0700 | [diff] [blame] | 749 | dma_release_channel(chan); |
| 750 | break; /* add_channel failed, punt */ |
| 751 | } |
| 752 | } else |
| 753 | break; /* no more channels available */ |
Andy Shevchenko | 15b8a8e | 2013-03-04 11:09:29 +0200 | [diff] [blame] | 754 | if (params->max_channels && |
| 755 | info->nr_channels >= params->max_channels) |
Dan Williams | 33df8ca | 2009-01-06 11:38:15 -0700 | [diff] [blame] | 756 | break; /* we have all we need */ |
| 757 | } |
Dan Williams | 33df8ca | 2009-01-06 11:38:15 -0700 | [diff] [blame] | 758 | return err; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 759 | } |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 760 | |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 761 | #ifndef MODULE |
| 762 | static int run_threaded_test(struct dmatest_info *info) |
| 763 | { |
| 764 | int ret; |
| 765 | |
| 766 | mutex_lock(&info->lock); |
| 767 | ret = __run_threaded_test(info); |
| 768 | mutex_unlock(&info->lock); |
| 769 | return ret; |
| 770 | } |
| 771 | #endif |
| 772 | |
| 773 | static void __stop_threaded_test(struct dmatest_info *info) |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 774 | { |
Dan Williams | 33df8ca | 2009-01-06 11:38:15 -0700 | [diff] [blame] | 775 | struct dmatest_chan *dtc, *_dtc; |
Dan Williams | 7cbd487 | 2009-03-04 16:06:03 -0700 | [diff] [blame] | 776 | struct dma_chan *chan; |
Dan Williams | 33df8ca | 2009-01-06 11:38:15 -0700 | [diff] [blame] | 777 | |
Andy Shevchenko | 838cc70 | 2013-03-04 11:09:28 +0200 | [diff] [blame] | 778 | list_for_each_entry_safe(dtc, _dtc, &info->channels, node) { |
Dan Williams | 33df8ca | 2009-01-06 11:38:15 -0700 | [diff] [blame] | 779 | list_del(&dtc->node); |
Dan Williams | 7cbd487 | 2009-03-04 16:06:03 -0700 | [diff] [blame] | 780 | chan = dtc->chan; |
Dan Williams | 33df8ca | 2009-01-06 11:38:15 -0700 | [diff] [blame] | 781 | dmatest_cleanup_channel(dtc); |
Andy Shevchenko | 838cc70 | 2013-03-04 11:09:28 +0200 | [diff] [blame] | 782 | pr_debug("dmatest: dropped channel %s\n", dma_chan_name(chan)); |
Dan Williams | 7cbd487 | 2009-03-04 16:06:03 -0700 | [diff] [blame] | 783 | dma_release_channel(chan); |
Dan Williams | 33df8ca | 2009-01-06 11:38:15 -0700 | [diff] [blame] | 784 | } |
Andy Shevchenko | 838cc70 | 2013-03-04 11:09:28 +0200 | [diff] [blame] | 785 | |
| 786 | info->nr_channels = 0; |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 787 | } |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 788 | |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 789 | static void stop_threaded_test(struct dmatest_info *info) |
| 790 | { |
| 791 | mutex_lock(&info->lock); |
| 792 | __stop_threaded_test(info); |
| 793 | mutex_unlock(&info->lock); |
| 794 | } |
| 795 | |
| 796 | static int __restart_threaded_test(struct dmatest_info *info, bool run) |
| 797 | { |
| 798 | struct dmatest_params *params = &info->params; |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 799 | |
| 800 | /* Stop any running test first */ |
| 801 | __stop_threaded_test(info); |
| 802 | |
| 803 | if (run == false) |
| 804 | return 0; |
| 805 | |
| 806 | /* Copy test parameters */ |
Andy Shevchenko | a6c268d | 2013-07-23 18:36:46 +0300 | [diff] [blame] | 807 | params->buf_size = test_buf_size; |
| 808 | strlcpy(params->channel, strim(test_channel), sizeof(params->channel)); |
| 809 | strlcpy(params->device, strim(test_device), sizeof(params->device)); |
| 810 | params->threads_per_chan = threads_per_chan; |
| 811 | params->max_channels = max_channels; |
| 812 | params->iterations = iterations; |
| 813 | params->xor_sources = xor_sources; |
| 814 | params->pq_sources = pq_sources; |
| 815 | params->timeout = timeout; |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 816 | |
| 817 | /* Run test with new parameters */ |
Andy Shevchenko | bcc567e | 2013-05-23 14:29:53 +0300 | [diff] [blame] | 818 | return __run_threaded_test(info); |
| 819 | } |
| 820 | |
| 821 | static bool __is_threaded_test_run(struct dmatest_info *info) |
| 822 | { |
| 823 | struct dmatest_chan *dtc; |
| 824 | |
| 825 | list_for_each_entry(dtc, &info->channels, node) { |
| 826 | struct dmatest_thread *thread; |
| 827 | |
| 828 | list_for_each_entry(thread, &dtc->threads, node) { |
| 829 | if (!thread->done) |
| 830 | return true; |
| 831 | } |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 832 | } |
| 833 | |
Andy Shevchenko | bcc567e | 2013-05-23 14:29:53 +0300 | [diff] [blame] | 834 | return false; |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 835 | } |
| 836 | |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 837 | static ssize_t dtf_read_run(struct file *file, char __user *user_buf, |
| 838 | size_t count, loff_t *ppos) |
| 839 | { |
| 840 | struct dmatest_info *info = file->private_data; |
| 841 | char buf[3]; |
| 842 | |
| 843 | mutex_lock(&info->lock); |
Andy Shevchenko | 3e5ccd8 | 2013-03-04 11:09:31 +0200 | [diff] [blame] | 844 | |
Andy Shevchenko | bcc567e | 2013-05-23 14:29:53 +0300 | [diff] [blame] | 845 | if (__is_threaded_test_run(info)) { |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 846 | buf[0] = 'Y'; |
Andy Shevchenko | 3e5ccd8 | 2013-03-04 11:09:31 +0200 | [diff] [blame] | 847 | } else { |
| 848 | __stop_threaded_test(info); |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 849 | buf[0] = 'N'; |
Andy Shevchenko | 3e5ccd8 | 2013-03-04 11:09:31 +0200 | [diff] [blame] | 850 | } |
| 851 | |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 852 | mutex_unlock(&info->lock); |
| 853 | buf[1] = '\n'; |
| 854 | buf[2] = 0x00; |
| 855 | return simple_read_from_buffer(user_buf, count, ppos, buf, 2); |
| 856 | } |
| 857 | |
| 858 | static ssize_t dtf_write_run(struct file *file, const char __user *user_buf, |
| 859 | size_t count, loff_t *ppos) |
| 860 | { |
| 861 | struct dmatest_info *info = file->private_data; |
| 862 | char buf[16]; |
| 863 | bool bv; |
| 864 | int ret = 0; |
| 865 | |
| 866 | if (copy_from_user(buf, user_buf, min(count, (sizeof(buf) - 1)))) |
| 867 | return -EFAULT; |
| 868 | |
| 869 | if (strtobool(buf, &bv) == 0) { |
| 870 | mutex_lock(&info->lock); |
Andy Shevchenko | bcc567e | 2013-05-23 14:29:53 +0300 | [diff] [blame] | 871 | |
| 872 | if (__is_threaded_test_run(info)) |
| 873 | ret = -EBUSY; |
| 874 | else |
| 875 | ret = __restart_threaded_test(info, bv); |
| 876 | |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 877 | mutex_unlock(&info->lock); |
| 878 | } |
| 879 | |
| 880 | return ret ? ret : count; |
| 881 | } |
| 882 | |
| 883 | static const struct file_operations dtf_run_fops = { |
| 884 | .read = dtf_read_run, |
| 885 | .write = dtf_write_run, |
| 886 | .open = simple_open, |
| 887 | .llseek = default_llseek, |
| 888 | }; |
| 889 | |
| 890 | static int dmatest_register_dbgfs(struct dmatest_info *info) |
| 891 | { |
| 892 | struct dentry *d; |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 893 | |
| 894 | d = debugfs_create_dir("dmatest", NULL); |
| 895 | if (IS_ERR(d)) |
| 896 | return PTR_ERR(d); |
| 897 | if (!d) |
| 898 | goto err_root; |
| 899 | |
| 900 | info->root = d; |
| 901 | |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 902 | /* Run or stop threaded test */ |
Andy Shevchenko | e24775e | 2013-07-23 18:36:47 +0300 | [diff] [blame] | 903 | debugfs_create_file("run", S_IWUSR | S_IRUGO, info->root, info, |
| 904 | &dtf_run_fops); |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 905 | |
| 906 | return 0; |
| 907 | |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 908 | err_root: |
| 909 | pr_err("dmatest: Failed to initialize debugfs\n"); |
Andy Shevchenko | e24775e | 2013-07-23 18:36:47 +0300 | [diff] [blame] | 910 | return -ENOMEM; |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 911 | } |
| 912 | |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 913 | static int __init dmatest_init(void) |
| 914 | { |
| 915 | struct dmatest_info *info = &test_info; |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 916 | int ret; |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 917 | |
| 918 | memset(info, 0, sizeof(*info)); |
| 919 | |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 920 | mutex_init(&info->lock); |
Andy Shevchenko | 838cc70 | 2013-03-04 11:09:28 +0200 | [diff] [blame] | 921 | INIT_LIST_HEAD(&info->channels); |
| 922 | |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 923 | ret = dmatest_register_dbgfs(info); |
| 924 | if (ret) |
| 925 | return ret; |
| 926 | |
| 927 | #ifdef MODULE |
| 928 | return 0; |
| 929 | #else |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 930 | return run_threaded_test(info); |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 931 | #endif |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 932 | } |
| 933 | /* when compiled-in wait for drivers to load first */ |
| 934 | late_initcall(dmatest_init); |
| 935 | |
| 936 | static void __exit dmatest_exit(void) |
| 937 | { |
| 938 | struct dmatest_info *info = &test_info; |
| 939 | |
Andy Shevchenko | 851b7e1 | 2013-03-04 11:09:30 +0200 | [diff] [blame] | 940 | debugfs_remove_recursive(info->root); |
Andy Shevchenko | e03e93a | 2013-03-04 11:09:27 +0200 | [diff] [blame] | 941 | stop_threaded_test(info); |
| 942 | } |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 943 | module_exit(dmatest_exit); |
| 944 | |
Jean Delvare | e05503e | 2011-05-18 16:49:24 +0200 | [diff] [blame] | 945 | MODULE_AUTHOR("Haavard Skinnemoen (Atmel)"); |
Haavard Skinnemoen | 4a776f0 | 2008-07-08 11:58:45 -0700 | [diff] [blame] | 946 | MODULE_LICENSE("GPL v2"); |