dmatest.c revision 872f05c6e9a37e9358fd58eb54deee7337863496
14a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen/* 24a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * DMA Engine test module 34a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * 44a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * Copyright (C) 2007 Atmel Corporation 5851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko * Copyright (C) 2013 Intel Corporation 64a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * 74a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * This program is free software; you can redistribute it and/or modify 84a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * it under the terms of the GNU General Public License version 2 as 94a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * published by the Free Software Foundation. 104a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen */ 11872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 12872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams 134a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#include <linux/delay.h> 14b7f080cfe223b3b7424872639d153695615a9255Alexey Dobriyan#include <linux/dma-mapping.h> 154a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#include <linux/dmaengine.h> 16981ed70d8e4faf3689dbf3c48868a31d5b004d7aGuennadi Liakhovetski#include <linux/freezer.h> 174a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#include <linux/init.h> 184a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#include <linux/kthread.h> 194a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#include <linux/module.h> 204a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#include <linux/moduleparam.h> 214a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#include <linux/random.h> 225a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 234a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#include <linux/wait.h> 244a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#include <linux/ctype.h> 254a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#include <linux/debugfs.h> 26a6c268d033b1f363e0d76c0483a0f99266542820Andy Shevchenko#include <linux/uaccess.h> 274a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#include <linux/seq_file.h> 284a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 2906190d8415219d9eef7d8f04b52a109e34575a76Kay Sieversstatic unsigned int test_buf_size = 16384; 30a6c268d033b1f363e0d76c0483a0f99266542820Andy Shevchenkomodule_param(test_buf_size, uint, S_IRUGO | S_IWUSR); 31a6c268d033b1f363e0d76c0483a0f99266542820Andy ShevchenkoMODULE_PARM_DESC(test_buf_size, "Size of the memcpy test buffer"); 324a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 334a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic char test_channel[20]; 3406190d8415219d9eef7d8f04b52a109e34575a76Kay Sieversmodule_param_string(channel, test_channel, sizeof(test_channel), 35a6c268d033b1f363e0d76c0483a0f99266542820Andy Shevchenko S_IRUGO | S_IWUSR); 36a6c268d033b1f363e0d76c0483a0f99266542820Andy ShevchenkoMODULE_PARM_DESC(channel, "Bus ID of the channel to test (default: any)"); 374a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 384a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic char test_device[20]; 394a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenmodule_param_string(device, test_device, sizeof(test_device), 40a6c268d033b1f363e0d76c0483a0f99266542820Andy Shevchenko S_IRUGO | S_IWUSR); 414a776f0aa922a552460192c07b56f4fe9cd82632Haavard SkinnemoenMODULE_PARM_DESC(device, "Bus ID of the DMA Engine to test (default: any)"); 424a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 434a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic unsigned int threads_per_chan = 1; 444a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenmodule_param(threads_per_chan, uint, S_IRUGO | S_IWUSR); 45a6c268d033b1f363e0d76c0483a0f99266542820Andy ShevchenkoMODULE_PARM_DESC(threads_per_chan, 4633df8ca068123457db56c316946a3c0e4ef787d6Dan Williams "Number of threads to start per channel (default: 1)"); 474a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 484a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic unsigned int max_channels; 490a2ff57d6fba92842272889b4bca447344cd9d36Nicolas Ferremodule_param(max_channels, uint, S_IRUGO | S_IWUSR); 50a6c268d033b1f363e0d76c0483a0f99266542820Andy ShevchenkoMODULE_PARM_DESC(max_channels, 510a2ff57d6fba92842272889b4bca447344cd9d36Nicolas Ferre "Maximum number of channels to use (default: all)"); 520a2ff57d6fba92842272889b4bca447344cd9d36Nicolas Ferre 530a2ff57d6fba92842272889b4bca447344cd9d36Nicolas Ferrestatic unsigned int iterations; 54b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williamsmodule_param(iterations, uint, S_IRUGO | S_IWUSR); 55a6c268d033b1f363e0d76c0483a0f99266542820Andy ShevchenkoMODULE_PARM_DESC(iterations, 56b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams "Iterations before stopping test (default: infinite)"); 57b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams 58b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williamsstatic unsigned int xor_sources = 3; 5958691d64c44ae41ddf098ecb31e9a994026e3cffDan Williamsmodule_param(xor_sources, uint, S_IRUGO | S_IWUSR); 60a6c268d033b1f363e0d76c0483a0f99266542820Andy ShevchenkoMODULE_PARM_DESC(xor_sources, 6158691d64c44ae41ddf098ecb31e9a994026e3cffDan Williams "Number of xor source buffers (default: 3)"); 6258691d64c44ae41ddf098ecb31e9a994026e3cffDan Williams 6358691d64c44ae41ddf098ecb31e9a994026e3cffDan Williamsstatic unsigned int pq_sources = 3; 64d42efe6bfb4eed8314c8ce3547f21954a4140399Viresh Kumarmodule_param(pq_sources, uint, S_IRUGO | S_IWUSR); 65a6c268d033b1f363e0d76c0483a0f99266542820Andy ShevchenkoMODULE_PARM_DESC(pq_sources, 6685ee7a1d39d75d23d21f3871f6dc9b87d572747aJoe Perches "Number of p+q source buffers (default: 3)"); 6785ee7a1d39d75d23d21f3871f6dc9b87d572747aJoe Perches 68d42efe6bfb4eed8314c8ce3547f21954a4140399Viresh Kumarstatic int timeout = 3000; 69e3b9c347316fe243bea6abd08681050c43ca22eeDan Williamsmodule_param(timeout, uint, S_IRUGO | S_IWUSR); 70e3b9c347316fe243bea6abd08681050c43ca22eeDan WilliamsMODULE_PARM_DESC(timeout, "Transfer Timeout in msec (default: 3000), " 71e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams "Pass -1 for infinite timeout"); 72e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams 73e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko/* Maximum amount of mismatched bytes in buffer to print */ 7415b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko#define MAX_ERROR_COUNT 32 75e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko 76e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko/* 77e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko * Initialization patterns. All bytes in the source buffer has bit 7 78e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko * set, all bytes in the destination buffer has bit 7 cleared. 79e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko * 80e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko * Bit 6 is set for all bytes which are to be copied by the DMA 81e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko * engine. Bit 5 is set for all bytes which are to be overwritten by 82e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko * the DMA engine. 83e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko * 84e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko * The remaining bits are the inverse of a counter which increments by 8515b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko * one for each byte address. 86e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko */ 87e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko#define PATTERN_SRC 0x80 88e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko#define PATTERN_DST 0x00 89e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko#define PATTERN_COPY 0x40 90e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko#define PATTERN_OVERWRITE 0x20 91e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko#define PATTERN_COUNT_MASK 0x1f 92e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko 93e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenkostruct dmatest_info; 94e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko 95e3b9c347316fe243bea6abd08681050c43ca22eeDan Williamsstruct dmatest_thread { 9615b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko struct list_head node; 9715b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko struct dmatest_info *info; 9815b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko struct task_struct *task; 9915b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko struct dma_chan *chan; 10015b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko u8 **srcs; 101851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko u8 **dsts; 10215b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko enum dma_transaction_type type; 103a310d037b8d06755c62bb4878c00d19490af5550Dan Williams bool done; 10415b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko}; 10515b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko 106838cc704ce5c8ab2a6d64d1324e37e040fcae3d8Andy Shevchenkostruct dmatest_chan { 107838cc704ce5c8ab2a6d64d1324e37e040fcae3d8Andy Shevchenko struct list_head node; 108838cc704ce5c8ab2a6d64d1324e37e040fcae3d8Andy Shevchenko struct dma_chan *chan; 109838cc704ce5c8ab2a6d64d1324e37e040fcae3d8Andy Shevchenko struct list_head threads; 110851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko}; 111a310d037b8d06755c62bb4878c00d19490af5550Dan Williams 112a310d037b8d06755c62bb4878c00d19490af5550Dan Williams/** 113a310d037b8d06755c62bb4878c00d19490af5550Dan Williams * struct dmatest_params - test parameters. 114a310d037b8d06755c62bb4878c00d19490af5550Dan Williams * @buf_size: size of the memcpy test buffer 115a310d037b8d06755c62bb4878c00d19490af5550Dan Williams * @channel: bus ID of the channel to test 116851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko * @device: bus ID of the DMA Engine to test 117a310d037b8d06755c62bb4878c00d19490af5550Dan Williams * @threads_per_chan: number of threads to start per channel 118a310d037b8d06755c62bb4878c00d19490af5550Dan Williams * @max_channels: maximum number of channels to use 119a310d037b8d06755c62bb4878c00d19490af5550Dan Williams * @iterations: iterations before stopping test 120a310d037b8d06755c62bb4878c00d19490af5550Dan Williams * @xor_sources: number of xor source buffers 121a310d037b8d06755c62bb4878c00d19490af5550Dan Williams * @pq_sources: number of p+q source buffers 122e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko * @timeout: transfer timeout in msec, -1 for infinite timeout 123a310d037b8d06755c62bb4878c00d19490af5550Dan Williams */ 124a310d037b8d06755c62bb4878c00d19490af5550Dan Williamsstruct dmatest_params { 125a310d037b8d06755c62bb4878c00d19490af5550Dan Williams unsigned int buf_size; 126e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko char channel[20]; 127a310d037b8d06755c62bb4878c00d19490af5550Dan Williams char device[20]; 128a310d037b8d06755c62bb4878c00d19490af5550Dan Williams unsigned int threads_per_chan; 129a310d037b8d06755c62bb4878c00d19490af5550Dan Williams unsigned int max_channels; 130a310d037b8d06755c62bb4878c00d19490af5550Dan Williams unsigned int iterations; 131a310d037b8d06755c62bb4878c00d19490af5550Dan Williams unsigned int xor_sources; 132a310d037b8d06755c62bb4878c00d19490af5550Dan Williams unsigned int pq_sources; 133a310d037b8d06755c62bb4878c00d19490af5550Dan Williams int timeout; 134a310d037b8d06755c62bb4878c00d19490af5550Dan Williams}; 135a310d037b8d06755c62bb4878c00d19490af5550Dan Williams 136a310d037b8d06755c62bb4878c00d19490af5550Dan Williams/** 137a310d037b8d06755c62bb4878c00d19490af5550Dan Williams * struct dmatest_info - test information. 138a310d037b8d06755c62bb4878c00d19490af5550Dan Williams * @params: test parameters 139a310d037b8d06755c62bb4878c00d19490af5550Dan Williams * @lock: access protection to the fields of this structure 140a310d037b8d06755c62bb4878c00d19490af5550Dan Williams */ 141a310d037b8d06755c62bb4878c00d19490af5550Dan Williamsstruct dmatest_info { 142a310d037b8d06755c62bb4878c00d19490af5550Dan Williams /* Test parameters */ 143a310d037b8d06755c62bb4878c00d19490af5550Dan Williams struct dmatest_params params; 144a310d037b8d06755c62bb4878c00d19490af5550Dan Williams 145a310d037b8d06755c62bb4878c00d19490af5550Dan Williams /* Internal state */ 146a310d037b8d06755c62bb4878c00d19490af5550Dan Williams struct list_head channels; 147a310d037b8d06755c62bb4878c00d19490af5550Dan Williams unsigned int nr_channels; 148a310d037b8d06755c62bb4878c00d19490af5550Dan Williams struct mutex lock; 149a310d037b8d06755c62bb4878c00d19490af5550Dan Williams 150a310d037b8d06755c62bb4878c00d19490af5550Dan Williams /* debugfs related stuff */ 151a310d037b8d06755c62bb4878c00d19490af5550Dan Williams struct dentry *root; 152a310d037b8d06755c62bb4878c00d19490af5550Dan Williams}; 153a310d037b8d06755c62bb4878c00d19490af5550Dan Williams 154a310d037b8d06755c62bb4878c00d19490af5550Dan Williamsstatic struct dmatest_info test_info; 155a310d037b8d06755c62bb4878c00d19490af5550Dan Williams 156a310d037b8d06755c62bb4878c00d19490af5550Dan Williamsstatic bool dmatest_match_channel(struct dmatest_params *params, 157a310d037b8d06755c62bb4878c00d19490af5550Dan Williams struct dma_chan *chan) 158a310d037b8d06755c62bb4878c00d19490af5550Dan Williams{ 159a310d037b8d06755c62bb4878c00d19490af5550Dan Williams if (params->channel[0] == '\0') 160a310d037b8d06755c62bb4878c00d19490af5550Dan Williams return true; 161a310d037b8d06755c62bb4878c00d19490af5550Dan Williams return strcmp(dma_chan_name(chan), params->channel) == 0; 162a310d037b8d06755c62bb4878c00d19490af5550Dan Williams} 163e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko 16415b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenkostatic bool dmatest_match_device(struct dmatest_params *params, 165e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko struct dma_device *device) 1664a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen{ 16715b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko if (params->device[0] == '\0') 1684a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen return true; 16915b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko return strcmp(dev_name(device->dev), params->device) == 0; 1704a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen} 1714a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 17215b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenkostatic unsigned long dmatest_random(void) 173e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko{ 1744a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen unsigned long buf; 17515b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko 1764a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen get_random_bytes(&buf, sizeof(buf)); 17715b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko return buf; 1784a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen} 1794a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 1804a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic void dmatest_init_srcs(u8 **bufs, unsigned int start, unsigned int len, 1814a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen unsigned int buf_size) 1824a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen{ 1834a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen unsigned int i; 184be9fa5a43641103bf13cd1bb8101a1453da03616Dan Williams u8 *buf; 1854a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 1864a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen for (; (buf = *bufs); bufs++) { 1874a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen for (i = 0; i < start; i++) 188e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK); 189e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko for ( ; i < start + len; i++) 1904a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen buf[i] = PATTERN_SRC | PATTERN_COPY 1914a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen | (~i & PATTERN_COUNT_MASK); 192b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams for ( ; i < buf_size; i++) 193b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK); 194b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams buf++; 195b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams } 196b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams} 197b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams 198b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williamsstatic void dmatest_init_dsts(u8 **bufs, unsigned int start, unsigned int len, 199c019894efc9c9ba5939948caa78c133b1ec8ae63Joe Perches unsigned int buf_size) 200e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko{ 201b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams unsigned int i; 202b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams u8 *buf; 203b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams 2044a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen for (; (buf = *bufs); bufs++) { 2054a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen for (i = 0; i < start; i++) 206e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK); 207e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko for ( ; i < start + len; i++) 2084a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen buf[i] = PATTERN_DST | PATTERN_OVERWRITE 2094a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen | (~i & PATTERN_COUNT_MASK); 210b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams for ( ; i < buf_size; i++) 211b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK); 212b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams } 213b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams} 214b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams 215b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williamsstatic void dmatest_mismatch(u8 actual, u8 pattern, unsigned int index, 216b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams unsigned int counter, bool is_srcbuf) 217b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams{ 218e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko u8 diff = actual ^ pattern; 219b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams u8 expected = pattern | (~counter & PATTERN_COUNT_MASK); 220b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams const char *thread_name = current->comm; 2214a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 2224a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (is_srcbuf) 2237b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams pr_warn("%s: srcbuf[0x%x] overwritten! Expected %02x, got %02x\n", 2247b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams thread_name, index, expected, actual); 2257b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams else if ((pattern & PATTERN_COPY) 2267b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams && (diff & (PATTERN_COPY | PATTERN_OVERWRITE))) 2277b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams pr_warn("%s: dstbuf[0x%x] not copied! Expected %02x, got %02x\n", 2287b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams thread_name, index, expected, actual); 2297b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams else if (diff & PATTERN_SRC) 2307b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams pr_warn("%s: dstbuf[0x%x] was copied! Expected %02x, got %02x\n", 2317b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams thread_name, index, expected, actual); 2327b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams else 2337b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams pr_warn("%s: dstbuf[0x%x] mismatch! Expected %02x, got %02x\n", 2347b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams thread_name, index, expected, actual); 2357b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams} 2367b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams 2377b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williamsstatic unsigned int dmatest_verify(u8 **bufs, unsigned int start, 2387b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams unsigned int end, unsigned int counter, u8 pattern, 2397b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams bool is_srcbuf) 2407b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams{ 2417b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams unsigned int i; 2427b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams unsigned int error_count = 0; 2437b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams u8 actual; 2447b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams u8 expected; 2457b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams u8 *buf; 2467b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams unsigned int counter_orig = counter; 2477b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams 2484a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen for (; (buf = *bufs); bufs++) { 2494a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen counter = counter_orig; 2504a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen for (i = start; i < end; i++) { 2514a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen actual = buf[i]; 252b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams expected = pattern | (~counter & PATTERN_COUNT_MASK); 253b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams if (actual != expected) { 254b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams if (error_count < MAX_ERROR_COUNT) 255b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams dmatest_mismatch(actual, pattern, i, 256b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams counter, is_srcbuf); 257b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams error_count++; 258b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams } 259b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams counter++; 260b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams } 261b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams } 2627b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams 2637b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams if (error_count > MAX_ERROR_COUNT) 2647b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams pr_warn("%s: %u errors suppressed\n", 265b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams current->comm, error_count - MAX_ERROR_COUNT); 266b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams 267b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams return error_count; 2684a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen} 2694a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 2704a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen/* poor man's completion - we want to use wait_event_freezable() on it */ 27174b5c07a515b2986c9bdfe649213b8e358d32ad2Andy Shevchenkostruct dmatest_done { 2727b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams bool done; 27374b5c07a515b2986c9bdfe649213b8e358d32ad2Andy Shevchenko wait_queue_head_t *wait; 2744a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen}; 2754a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 2764a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic void dmatest_callback(void *arg) 2774a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen{ 278adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo struct dmatest_done *done = arg; 279adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo 280adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo done->done = true; 281adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo wake_up_all(done->wait); 282adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo} 283adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo 284adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heostatic inline void unmap_src(struct device *dev, dma_addr_t *addr, size_t len, 285e44e0aa3cfa97cddff01704751a4b25151830c72Dan Williams unsigned int count) 286adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo{ 287adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo while (count--) 288adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo dma_unmap_single(dev, addr[count], len, DMA_TO_DEVICE); 289adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo} 290e44e0aa3cfa97cddff01704751a4b25151830c72Dan Williams 291e44e0aa3cfa97cddff01704751a4b25151830c72Dan Williamsstatic inline void unmap_dst(struct device *dev, dma_addr_t *addr, size_t len, 292632fd28326c0cc7be9c51ea0d76d8bec39a695e9Andy Shevchenko unsigned int count) 293632fd28326c0cc7be9c51ea0d76d8bec39a695e9Andy Shevchenko{ 294632fd28326c0cc7be9c51ea0d76d8bec39a695e9Andy Shevchenko while (count--) 295632fd28326c0cc7be9c51ea0d76d8bec39a695e9Andy Shevchenko dma_unmap_single(dev, addr[count], len, DMA_BIDIRECTIONAL); 296632fd28326c0cc7be9c51ea0d76d8bec39a695e9Andy Shevchenko} 297632fd28326c0cc7be9c51ea0d76d8bec39a695e9Andy Shevchenko 298632fd28326c0cc7be9c51ea0d76d8bec39a695e9Andy Shevchenkostatic unsigned int min_odd(unsigned int x, unsigned int y) 299632fd28326c0cc7be9c51ea0d76d8bec39a695e9Andy Shevchenko{ 300632fd28326c0cc7be9c51ea0d76d8bec39a695e9Andy Shevchenko unsigned int val = min(x, y); 301632fd28326c0cc7be9c51ea0d76d8bec39a695e9Andy Shevchenko 302632fd28326c0cc7be9c51ea0d76d8bec39a695e9Andy Shevchenko return val % 2 ? val : val - 1; 303632fd28326c0cc7be9c51ea0d76d8bec39a695e9Andy Shevchenko} 304632fd28326c0cc7be9c51ea0d76d8bec39a695e9Andy Shevchenko 305632fd28326c0cc7be9c51ea0d76d8bec39a695e9Andy Shevchenkostatic void result(const char *err, unsigned int n, unsigned int src_off, 3068be9e32b310cd8c4302991c8ff6692689c7d9d76Akinobu Mita unsigned int dst_off, unsigned int len, unsigned long data) 3078be9e32b310cd8c4302991c8ff6692689c7d9d76Akinobu Mita{ 3088be9e32b310cd8c4302991c8ff6692689c7d9d76Akinobu Mita pr_info("%s: result #%u: '%s' with src_off=0x%x ""dst_off=0x%x len=0x%x (%lu)", 3098be9e32b310cd8c4302991c8ff6692689c7d9d76Akinobu Mita current->comm, n, err, src_off, dst_off, len, data); 3108be9e32b310cd8c4302991c8ff6692689c7d9d76Akinobu Mita} 3118be9e32b310cd8c4302991c8ff6692689c7d9d76Akinobu Mita 3128be9e32b310cd8c4302991c8ff6692689c7d9d76Akinobu Mitastatic void dbg_result(const char *err, unsigned int n, unsigned int src_off, 313872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams unsigned int dst_off, unsigned int len, 314872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams unsigned long data) 31595019c8c5af947f64e4a62e08a4a275bc36148eeAndy Shevchenko{ 316872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams pr_debug("%s: result #%u: '%s' with src_off=0x%x ""dst_off=0x%x len=0x%x (%lu)", 317872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams current->comm, n, err, src_off, dst_off, len, data); 31895019c8c5af947f64e4a62e08a4a275bc36148eeAndy Shevchenko} 31995019c8c5af947f64e4a62e08a4a275bc36148eeAndy Shevchenko 320872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams/* 321872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams * This function repeatedly tests DMA transfers of various lengths and 322872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams * offsets for a given operation type until it is told to exit by 32395019c8c5af947f64e4a62e08a4a275bc36148eeAndy Shevchenko * kthread_stop(). There may be multiple threads running this function 324872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams * in parallel for a single channel, and there may be multiple channels 325872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams * being tested in parallel. 32695019c8c5af947f64e4a62e08a4a275bc36148eeAndy Shevchenko * 32795019c8c5af947f64e4a62e08a4a275bc36148eeAndy Shevchenko * Before each test, the source and destination buffer is initialized 3284a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * with a known pattern. This pattern is different depending on 3294a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * whether it's in an area which is supposed to be copied or 330b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams * overwritten, and different in the source and destination buffers. 331b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams * So if the DMA engine doesn't copy exactly what we tell it to copy, 332b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams * we'll notice. 333b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams */ 3344a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic int dmatest_func(void *data) 3354a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen{ 3364a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen DECLARE_WAIT_QUEUE_HEAD_ONSTACK(done_wait); 3374a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dmatest_thread *thread = data; 3384a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dmatest_done done = { .wait = &done_wait }; 3394a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dmatest_info *info; 3404a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dmatest_params *params; 3414a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dma_chan *chan; 3424a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dma_device *dev; 3434a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen unsigned int src_off, dst_off, len; 344adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo unsigned int error_count; 3454a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen unsigned int failed_tests = 0; 346adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo unsigned int total_tests = 0; 347e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko dma_cookie_t cookie; 34815b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko enum dma_status status; 3494a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen enum dma_ctrl_flags flags; 3508be9e32b310cd8c4302991c8ff6692689c7d9d76Akinobu Mita u8 *pq_coefs = NULL; 3514a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen int ret; 3524a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen int src_cnt; 3534a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen int dst_cnt; 3544a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen int i; 3554a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 3564a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen set_freezable(); 357b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams 358945b5af3cedcdfed6d2d940e53cd19933bb57386Andy Shevchenko ret = -ENOMEM; 3594a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 360b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams smp_rmb(); 361b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams info = thread->info; 362b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams params = &info->params; 3634a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen chan = thread->chan; 364adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo dev = chan->device; 3654a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (thread->type == DMA_MEMCPY) 3664a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen src_cnt = dst_cnt = 1; 3674a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen else if (thread->type == DMA_XOR) { 3684a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen /* force odd to ensure dst = src */ 369e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko src_cnt = min_odd(params->xor_sources | 1, dev->max_xor); 37015b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko dst_cnt = 1; 3714a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen } else if (thread->type == DMA_PQ) { 3728be9e32b310cd8c4302991c8ff6692689c7d9d76Akinobu Mita /* force odd to ensure dst = src */ 373b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams src_cnt = min_odd(params->pq_sources | 1, dma_maxpq(dev, 0)); 374b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams dst_cnt = 2; 375b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams 3768be9e32b310cd8c4302991c8ff6692689c7d9d76Akinobu Mita pq_coefs = kmalloc(params->pq_sources+1, GFP_KERNEL); 37715b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko if (!pq_coefs) 378b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams goto err_thread_type; 37958691d64c44ae41ddf098ecb31e9a994026e3cffDan Williams 3808be9e32b310cd8c4302991c8ff6692689c7d9d76Akinobu Mita for (i = 0; i < src_cnt; i++) 38115b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko pq_coefs[i] = 1; 38258691d64c44ae41ddf098ecb31e9a994026e3cffDan Williams } else 383945b5af3cedcdfed6d2d940e53cd19933bb57386Andy Shevchenko goto err_thread_type; 38415b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko 385945b5af3cedcdfed6d2d940e53cd19933bb57386Andy Shevchenko thread->srcs = kcalloc(src_cnt+1, sizeof(u8 *), GFP_KERNEL); 386945b5af3cedcdfed6d2d940e53cd19933bb57386Andy Shevchenko if (!thread->srcs) 387945b5af3cedcdfed6d2d940e53cd19933bb57386Andy Shevchenko goto err_srcs; 38894de648d72c8bc833590523f22386d4babbea988Anatolij Gustschin for (i = 0; i < src_cnt; i++) { 38958691d64c44ae41ddf098ecb31e9a994026e3cffDan Williams thread->srcs[i] = kmalloc(params->buf_size, GFP_KERNEL); 390b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams if (!thread->srcs[i]) 391945b5af3cedcdfed6d2d940e53cd19933bb57386Andy Shevchenko goto err_srcbuf; 392b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams } 393b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams thread->srcs[i] = NULL; 394b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams 395b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams thread->dsts = kcalloc(dst_cnt+1, sizeof(u8 *), GFP_KERNEL); 396b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams if (!thread->dsts) 39715b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko goto err_dsts; 398b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams for (i = 0; i < dst_cnt; i++) { 399b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams thread->dsts[i] = kmalloc(params->buf_size, GFP_KERNEL); 400b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams if (!thread->dsts[i]) 401b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams goto err_dstbuf; 402b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams } 403b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams thread->dsts[i] = NULL; 404b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams 405b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams set_user_nice(current, 10); 406b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams 40715b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko /* 408b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams * src and dst buffers are freed by ourselves below 409b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams */ 410b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT; 411b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams 412b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams while (!kthread_should_stop() 413e44e0aa3cfa97cddff01704751a4b25151830c72Dan Williams && !(params->iterations && total_tests >= params->iterations)) { 414e44e0aa3cfa97cddff01704751a4b25151830c72Dan Williams struct dma_async_tx_descriptor *tx = NULL; 415b203bd3f6b9c3db3b1979c2ff79bb2b9be8f03a3Ira Snyder dma_addr_t dma_srcs[src_cnt]; 416d1cab34c039584ebe76b04d2f2109e0d87d344e1Bartlomiej Zolnierkiewicz dma_addr_t dma_dsts[dst_cnt]; 417b203bd3f6b9c3db3b1979c2ff79bb2b9be8f03a3Ira Snyder u8 align = 0; 4180776ae7b89782124ddd72eafe0b1e0fdcdabe32eBartlomiej Zolnierkiewicz 4194a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen total_tests++; 4200a2ff57d6fba92842272889b4bca447344cd9d36Nicolas Ferre 42115b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko /* honor alignment restrictions */ 422b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams if (thread->type == DMA_MEMCPY) 423b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams align = dev->copy_align; 424b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams else if (thread->type == DMA_XOR) 42583544ae9f3991bfc7d5e0fe9a3008cd05a8d57b7Dan Williams align = dev->xor_align; 426d86be86e9aab221089d72399072511f13fe2a771Atsushi Nemoto else if (thread->type == DMA_PQ) 4274a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen align = dev->pq_align; 4284a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 42983544ae9f3991bfc7d5e0fe9a3008cd05a8d57b7Dan Williams if (1 << align > params->buf_size) { 43083544ae9f3991bfc7d5e0fe9a3008cd05a8d57b7Dan Williams pr_err("%u-byte buffer too small for %d-byte alignment\n", 43183544ae9f3991bfc7d5e0fe9a3008cd05a8d57b7Dan Williams params->buf_size, 1 << align); 43283544ae9f3991bfc7d5e0fe9a3008cd05a8d57b7Dan Williams break; 43383544ae9f3991bfc7d5e0fe9a3008cd05a8d57b7Dan Williams } 43483544ae9f3991bfc7d5e0fe9a3008cd05a8d57b7Dan Williams 43583544ae9f3991bfc7d5e0fe9a3008cd05a8d57b7Dan Williams len = dmatest_random() % params->buf_size + 1; 43683544ae9f3991bfc7d5e0fe9a3008cd05a8d57b7Dan Williams len = (len >> align) << align; 43715b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko if (!len) 438cfe4f2751ef1a5390b56c5d263f90b6ff138ba31Guennadi Liakhovetski len = 1 << align; 43915b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko src_off = dmatest_random() % (params->buf_size - len + 1); 440cfe4f2751ef1a5390b56c5d263f90b6ff138ba31Guennadi Liakhovetski dst_off = dmatest_random() % (params->buf_size - len + 1); 441cfe4f2751ef1a5390b56c5d263f90b6ff138ba31Guennadi Liakhovetski 442cfe4f2751ef1a5390b56c5d263f90b6ff138ba31Guennadi Liakhovetski src_off = (src_off >> align) << align; 443e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams dst_off = (dst_off >> align) << align; 444e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams 445e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams dmatest_init_srcs(thread->srcs, src_off, len, params->buf_size); 446e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams dmatest_init_dsts(thread->dsts, dst_off, len, params->buf_size); 447e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams 448e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams for (i = 0; i < src_cnt; i++) { 449e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams u8 *buf = thread->srcs[i] + src_off; 450e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams 451e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams dma_srcs[i] = dma_map_single(dev->dev, buf, len, 452e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams DMA_TO_DEVICE); 453e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams ret = dma_mapping_error(dev->dev, dma_srcs[i]); 454e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams if (ret) { 455e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams unmap_src(dev->dev, dma_srcs, len, i); 456e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams result("src mapping error", total_tests, 457e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams src_off, dst_off, len, ret); 458e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams failed_tests++; 459e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams continue; 460e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams } 461e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams } 462e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams /* map with DMA_BIDIRECTIONAL to force writeback/invalidate */ 463e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams for (i = 0; i < dst_cnt; i++) { 46483544ae9f3991bfc7d5e0fe9a3008cd05a8d57b7Dan Williams dma_dsts[i] = dma_map_single(dev->dev, thread->dsts[i], 465cfe4f2751ef1a5390b56c5d263f90b6ff138ba31Guennadi Liakhovetski params->buf_size, 466cfe4f2751ef1a5390b56c5d263f90b6ff138ba31Guennadi Liakhovetski DMA_BIDIRECTIONAL); 4674a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen ret = dma_mapping_error(dev->dev, dma_dsts[i]); 468b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams if (ret) { 469b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams unmap_src(dev->dev, dma_srcs, len, src_cnt); 470b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams unmap_dst(dev->dev, dma_dsts, params->buf_size, 471b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams i); 472b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams result("dst mapping error", total_tests, 473afde3be121efcc658e26f8cc71ead04af96d38f9Andy Shevchenko src_off, dst_off, len, ret); 474afde3be121efcc658e26f8cc71ead04af96d38f9Andy Shevchenko failed_tests++; 475afde3be121efcc658e26f8cc71ead04af96d38f9Andy Shevchenko continue; 476872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams } 477872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams } 478afde3be121efcc658e26f8cc71ead04af96d38f9Andy Shevchenko 479afde3be121efcc658e26f8cc71ead04af96d38f9Andy Shevchenko if (thread->type == DMA_MEMCPY) 480afde3be121efcc658e26f8cc71ead04af96d38f9Andy Shevchenko tx = dev->device_prep_dma_memcpy(chan, 481b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams dma_dsts[0] + dst_off, 482d86be86e9aab221089d72399072511f13fe2a771Atsushi Nemoto dma_srcs[0], len, 483b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams flags); 484b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams else if (thread->type == DMA_XOR) 48515b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko tx = dev->device_prep_dma_xor(chan, 486b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams dma_dsts[0] + dst_off, 487afde3be121efcc658e26f8cc71ead04af96d38f9Andy Shevchenko dma_srcs, src_cnt, 488afde3be121efcc658e26f8cc71ead04af96d38f9Andy Shevchenko len, flags); 489afde3be121efcc658e26f8cc71ead04af96d38f9Andy Shevchenko else if (thread->type == DMA_PQ) { 49015b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko dma_addr_t dma_pq[dst_cnt]; 49115b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko 492872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams for (i = 0; i < dst_cnt; i++) 493872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams dma_pq[i] = dma_dsts[i] + dst_off; 494afde3be121efcc658e26f8cc71ead04af96d38f9Andy Shevchenko tx = dev->device_prep_dma_pq(chan, dma_pq, dma_srcs, 495afde3be121efcc658e26f8cc71ead04af96d38f9Andy Shevchenko src_cnt, pq_coefs, 496afde3be121efcc658e26f8cc71ead04af96d38f9Andy Shevchenko len, flags); 497b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams } 498b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams 499b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams if (!tx) { 500b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams unmap_src(dev->dev, dma_srcs, len, src_cnt); 501b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams unmap_dst(dev->dev, dma_dsts, params->buf_size, 502b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams dst_cnt); 503b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams result("prep error", total_tests, src_off, 504b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams dst_off, len, ret); 505b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams msleep(100); 506b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams failed_tests++; 50767b9124f734b22b30d9adf18c39fe795e2901070Dan Williams continue; 508b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams } 50958691d64c44ae41ddf098ecb31e9a994026e3cffDan Williams 51058691d64c44ae41ddf098ecb31e9a994026e3cffDan Williams done.done = false; 51158691d64c44ae41ddf098ecb31e9a994026e3cffDan Williams tx->callback = dmatest_callback; 51258691d64c44ae41ddf098ecb31e9a994026e3cffDan Williams tx->callback_param = &done; 51358691d64c44ae41ddf098ecb31e9a994026e3cffDan Williams cookie = tx->tx_submit(tx); 51458691d64c44ae41ddf098ecb31e9a994026e3cffDan Williams 51594de648d72c8bc833590523f22386d4babbea988Anatolij Gustschin if (dma_submit_error(cookie)) { 51658691d64c44ae41ddf098ecb31e9a994026e3cffDan Williams result("submit error", total_tests, src_off, 51758691d64c44ae41ddf098ecb31e9a994026e3cffDan Williams dst_off, len, ret); 518d86be86e9aab221089d72399072511f13fe2a771Atsushi Nemoto msleep(100); 519d86be86e9aab221089d72399072511f13fe2a771Atsushi Nemoto failed_tests++; 520632fd28326c0cc7be9c51ea0d76d8bec39a695e9Andy Shevchenko continue; 52115b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko } 52215b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko dma_async_issue_pending(chan); 523872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams 524872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams wait_event_freezable_timeout(done_wait, done.done, 525d86be86e9aab221089d72399072511f13fe2a771Atsushi Nemoto msecs_to_jiffies(params->timeout)); 526d86be86e9aab221089d72399072511f13fe2a771Atsushi Nemoto 527d86be86e9aab221089d72399072511f13fe2a771Atsushi Nemoto status = dma_async_is_tx_complete(chan, cookie, NULL, NULL); 528d86be86e9aab221089d72399072511f13fe2a771Atsushi Nemoto 529e44e0aa3cfa97cddff01704751a4b25151830c72Dan Williams if (!done.done) { 530adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo /* 531e44e0aa3cfa97cddff01704751a4b25151830c72Dan Williams * We're leaving the timed out dma operation with 532adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo * dangling pointer to done_wait. To make this 533d86be86e9aab221089d72399072511f13fe2a771Atsushi Nemoto * correct, we'll need to allocate wait_done for 534d86be86e9aab221089d72399072511f13fe2a771Atsushi Nemoto * each test iteration and perform "who's gonna 5354a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * free it this time?" dancing. For now, just 536872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams * leave it dangling. 537872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams */ 5384a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen result("test timed out", total_tests, src_off, dst_off, 5394a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen len, 0); 5404a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen failed_tests++; 5414a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen continue; 542b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams } else if (status != DMA_SUCCESS) { 5434a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen result(status == DMA_ERROR ? 544bcc567e3115055a9cc256183d72864f01286be22Andy Shevchenko "completion error status" : 54515b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko "completion busy status", total_tests, src_off, 546981ed70d8e4faf3689dbf3c48868a31d5b004d7aGuennadi Liakhovetski dst_off, len, ret); 547e44e0aa3cfa97cddff01704751a4b25151830c72Dan Williams failed_tests++; 5484a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen continue; 549adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo } 550adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo 551adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo /* Unmap by myself */ 552adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo unmap_src(dev->dev, dma_srcs, len, src_cnt); 553adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo unmap_dst(dev->dev, dma_dsts, params->buf_size, dst_cnt); 554adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo 555adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo error_count = 0; 556adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo 557adfa543e7314b36ac55a40019977de6e47946dd7Tejun Heo pr_debug("%s: verifying source buffer...\n", current->comm); 558872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams error_count += dmatest_verify(thread->srcs, 0, src_off, 559872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams 0, PATTERN_SRC, true); 560e44e0aa3cfa97cddff01704751a4b25151830c72Dan Williams error_count += dmatest_verify(thread->srcs, src_off, 561e44e0aa3cfa97cddff01704751a4b25151830c72Dan Williams src_off + len, src_off, 562e44e0aa3cfa97cddff01704751a4b25151830c72Dan Williams PATTERN_SRC | PATTERN_COPY, true); 563872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams error_count += dmatest_verify(thread->srcs, src_off + len, 564872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams params->buf_size, src_off + len, 565872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams PATTERN_SRC, true); 566872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams 5674a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_debug("%s: verifying dest buffer...\n", current->comm); 5684a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen error_count += dmatest_verify(thread->dsts, 0, dst_off, 5694a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 0, PATTERN_DST, false); 570e44e0aa3cfa97cddff01704751a4b25151830c72Dan Williams error_count += dmatest_verify(thread->dsts, dst_off, 571d1cab34c039584ebe76b04d2f2109e0d87d344e1Bartlomiej Zolnierkiewicz dst_off + len, src_off, 572d1cab34c039584ebe76b04d2f2109e0d87d344e1Bartlomiej Zolnierkiewicz PATTERN_SRC | PATTERN_COPY, false); 57315b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko error_count += dmatest_verify(thread->dsts, dst_off + len, 5744a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen params->buf_size, dst_off + len, 575e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams PATTERN_DST, false); 576e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams 577e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams if (error_count) { 578e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams result("data error", total_tests, src_off, dst_off, 579e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams len, error_count); 5804a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen failed_tests++; 581872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams } else { 582e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams dbg_result("test passed", total_tests, src_off, dst_off, 5834a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen len, 0); 5847b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams } 5857b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams } 5867b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams 5877b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams ret = 0; 5887b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams for (i = 0; thread->dsts[i]; i++) 5897b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams kfree(thread->dsts[i]); 5907b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williamserr_dstbuf: 591872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams kfree(thread->dsts); 5927b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williamserr_dsts: 5934a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen for (i = 0; thread->srcs[i]; i++) 5947b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams kfree(thread->srcs[i]); 5957b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williamserr_srcbuf: 5967b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams kfree(thread->srcs); 5977b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williamserr_srcs: 5987b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williams kfree(pq_coefs); 5997b61017822cdff9c18ae70005cf52d84e8dafe5dDan Williamserr_thread_type: 6004a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_info("%s: terminating after %u tests, %u failures (status %d)\n", 6014a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen current->comm, total_tests, failed_tests, ret); 602872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams 603872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams /* terminate all transfers on specified channels */ 6044a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (ret) 6054a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dmaengine_terminate_all(chan); 606872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams 607872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams thread->done = true; 6084a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 6094a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (params->iterations > 0) 6104a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen while (!kthread_should_stop()) { 6114a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wait_dmatest_exit); 612b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams interruptible_sleep_on(&wait_dmatest_exit); 613b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams } 6144a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 615b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams return ret; 616b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams} 617b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams 618b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williamsstatic void dmatest_cleanup_channel(struct dmatest_chan *dtc) 6194a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen{ 620b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams struct dmatest_thread *thread; 621b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams struct dmatest_thread *_thread; 622945b5af3cedcdfed6d2d940e53cd19933bb57386Andy Shevchenko int ret; 623945b5af3cedcdfed6d2d940e53cd19933bb57386Andy Shevchenko 624872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams list_for_each_entry_safe(thread, _thread, &dtc->threads, node) { 625872f05c6e9a37e9358fd58eb54deee7337863496Dan Williams ret = kthread_stop(thread->task); 6260a2ff57d6fba92842272889b4bca447344cd9d36Nicolas Ferre pr_debug("dmatest: thread %s exited with status %d\n", 6279704efaa52ab18eb3504c4e0bc421c1d01b7981aViresh Kumar thread->task->comm, ret); 6285e034f7b659be9d94e64aaaa985ab530dd847fdbShiraz Hashim list_del(&thread->node); 6295e034f7b659be9d94e64aaaa985ab530dd847fdbShiraz Hashim kfree(thread); 6305e034f7b659be9d94e64aaaa985ab530dd847fdbShiraz Hashim } 6313e5ccd866fdf3a1e1d4d2c08c81f861ad6798d32Andy Shevchenko 6323e5ccd866fdf3a1e1d4d2c08c81f861ad6798d32Andy Shevchenko /* terminate all transfers on specified channels */ 63315b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko dmaengine_terminate_all(dtc->chan); 6340a2ff57d6fba92842272889b4bca447344cd9d36Nicolas Ferre 635b953df7c70740cd7593072ebec77a8f658505630Yong Zhang kfree(dtc); 6360a2ff57d6fba92842272889b4bca447344cd9d36Nicolas Ferre} 6370a2ff57d6fba92842272889b4bca447344cd9d36Nicolas Ferre 6380a2ff57d6fba92842272889b4bca447344cd9d36Nicolas Ferrestatic int dmatest_add_threads(struct dmatest_info *info, 6394a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dmatest_chan *dtc, enum dma_transaction_type type) 6404a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen{ 6414a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dmatest_params *params = &info->params; 6424a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dmatest_thread *thread; 6434a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dma_chan *chan = dtc->chan; 6444a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen char *op; 6454a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen unsigned int i; 6464a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 6474a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (type == DMA_MEMCPY) 6484a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen op = "copy"; 6494a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen else if (type == DMA_XOR) 6500adff800662f52d0ffc3e420db231769cb3fff13Dan Williams op = "xor"; 6510adff800662f52d0ffc3e420db231769cb3fff13Dan Williams else if (type == DMA_PQ) 6524a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen op = "pq"; 6534a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen else 6544a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen return -EINVAL; 6559704efaa52ab18eb3504c4e0bc421c1d01b7981aViresh Kumar 6569704efaa52ab18eb3504c4e0bc421c1d01b7981aViresh Kumar for (i = 0; i < params->threads_per_chan; i++) { 657944ea4dd38b8575e30a5699633c81945bff1864dJon Mason thread = kzalloc(sizeof(struct dmatest_thread), GFP_KERNEL); 6589704efaa52ab18eb3504c4e0bc421c1d01b7981aViresh Kumar if (!thread) { 6594a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_warning("dmatest: No memory for %s-%s%u\n", 6604a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dma_chan_name(chan), op, i); 6614a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 662e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko break; 663e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko } 6644a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread->info = info; 66515b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko thread->chan = dtc->chan; 666b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams thread->type = type; 667b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams smp_wmb(); 668b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams thread->task = kthread_run(dmatest_func, thread, "%s-%s%u", 669b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams dma_chan_name(chan), op, i); 6704a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (IS_ERR(thread->task)) { 671b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams pr_warning("dmatest: Failed to run thread %s-%s%u\n", 672b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams dma_chan_name(chan), op, i); 673b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams kfree(thread); 674b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams break; 67558691d64c44ae41ddf098ecb31e9a994026e3cffDan Williams } 67658691d64c44ae41ddf098ecb31e9a994026e3cffDan Williams 677b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams /* srcbuf and dstbuf are allocated by the thread itself */ 678b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams 6794a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen list_add_tail(&thread->node, &dtc->threads); 68015b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko } 6814a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 6824a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen return i; 6830adff800662f52d0ffc3e420db231769cb3fff13Dan Williams} 6840adff800662f52d0ffc3e420db231769cb3fff13Dan Williams 6854a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic int dmatest_add_channel(struct dmatest_info *info, 6864a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dma_chan *chan) 687e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko{ 6884a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dmatest_chan *dtc; 689b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams struct dma_device *dma_dev = chan->device; 6904a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen unsigned int thread_count = 0; 691b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams int cnt; 692b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams 6934a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dtc = kmalloc(sizeof(struct dmatest_chan), GFP_KERNEL); 6940adff800662f52d0ffc3e420db231769cb3fff13Dan Williams if (!dtc) { 6950adff800662f52d0ffc3e420db231769cb3fff13Dan Williams pr_warning("dmatest: No memory for %s\n", dma_chan_name(chan)); 6964a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen return -ENOMEM; 6974a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen } 6984a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 6994a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dtc->chan = chan; 7004a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen INIT_LIST_HEAD(&dtc->threads); 7014a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 7024a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) { 7034a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen cnt = dmatest_add_threads(info, dtc, DMA_MEMCPY); 7044a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread_count += cnt > 0 ? cnt : 0; 705b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams } 706b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) { 707b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams cnt = dmatest_add_threads(info, dtc, DMA_XOR); 708e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko thread_count += cnt > 0 ? cnt : 0; 709e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko } 710b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams if (dma_has_cap(DMA_PQ, dma_dev->cap_mask)) { 711b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams cnt = dmatest_add_threads(info, dtc, DMA_PQ); 712b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams thread_count += cnt > 0 ? cnt : 0; 713b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams } 714b9033e682e86f3c6a66763f9b6a3935c5c64e145Kulikov Vasiliy 715b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams pr_info("dmatest: Started %u threads using %s\n", 716b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams thread_count, dma_chan_name(chan)); 717b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams 7180adff800662f52d0ffc3e420db231769cb3fff13Dan Williams list_add_tail(&dtc->node, &info->channels); 719b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams info->nr_channels++; 720b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams 721b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams return 0; 722b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams} 723b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams 724b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williamsstatic bool filter(struct dma_chan *chan, void *param) 725b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams{ 726e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko struct dmatest_params *params = param; 727f1aef8b6e6abf32a3a269542f95a19e2cb319f6cNicolas Ferre 728b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams if (!dmatest_match_channel(params, chan) || 729b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams !dmatest_match_device(params, chan->device)) 730e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko return false; 731f1aef8b6e6abf32a3a269542f95a19e2cb319f6cNicolas Ferre else 732b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams return true; 73358691d64c44ae41ddf098ecb31e9a994026e3cffDan Williams} 734e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko 735d07a74a546981a09ba490936645fbf0d1340b96cDr. David Alan Gilbertstatic int __run_threaded_test(struct dmatest_info *info) 73658691d64c44ae41ddf098ecb31e9a994026e3cffDan Williams{ 737b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams dma_cap_mask_t mask; 7380adff800662f52d0ffc3e420db231769cb3fff13Dan Williams struct dma_chan *chan; 739b54d5cb9156868fb4f27ccd46a3afb0bf3ef8e0cDan Williams struct dmatest_params *params = &info->params; 7404a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen int err = 0; 741838cc704ce5c8ab2a6d64d1324e37e040fcae3d8Andy Shevchenko 742838cc704ce5c8ab2a6d64d1324e37e040fcae3d8Andy Shevchenko dma_cap_zero(mask); 7434a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dma_cap_set(DMA_MEMCPY, mask); 74433df8ca068123457db56c316946a3c0e4ef787d6Dan Williams for (;;) { 7454a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen chan = dma_request_channel(mask, filter, params); 7464a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (chan) { 7477dd602510128d7a64b11ff3b7d4f30ac8e3946ceDan Williams err = dmatest_add_channel(info, chan); 7484a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (err) { 74915b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko dma_release_channel(chan); 750e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko break; /* add_channel failed, punt */ 75115b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko } 75215b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko } else 7537dd602510128d7a64b11ff3b7d4f30ac8e3946ceDan Williams break; /* no more channels available */ 75433df8ca068123457db56c316946a3c0e4ef787d6Dan Williams if (params->max_channels && 7557dd602510128d7a64b11ff3b7d4f30ac8e3946ceDan Williams info->nr_channels >= params->max_channels) 7564a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen break; /* we have all we need */ 7574a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen } 758a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams return err; 759a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams} 7604a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 76133df8ca068123457db56c316946a3c0e4ef787d6Dan Williams#ifndef MODULE 762a310d037b8d06755c62bb4878c00d19490af5550Dan Williamsstatic int run_threaded_test(struct dmatest_info *info) 76333df8ca068123457db56c316946a3c0e4ef787d6Dan Williams{ 764a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams int ret; 76533df8ca068123457db56c316946a3c0e4ef787d6Dan Williams 766a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams mutex_lock(&info->lock); 767a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams ret = __run_threaded_test(info); 768a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams mutex_unlock(&info->lock); 76915b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko return ret; 77033df8ca068123457db56c316946a3c0e4ef787d6Dan Williams} 771a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams#endif 77233df8ca068123457db56c316946a3c0e4ef787d6Dan Williams 77333df8ca068123457db56c316946a3c0e4ef787d6Dan Williamsstatic void __stop_threaded_test(struct dmatest_info *info) 77433df8ca068123457db56c316946a3c0e4ef787d6Dan Williams{ 77533df8ca068123457db56c316946a3c0e4ef787d6Dan Williams struct dmatest_chan *dtc, *_dtc; 77633df8ca068123457db56c316946a3c0e4ef787d6Dan Williams struct dma_chan *chan; 77715b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko 77815b8a8ea1a87313f1b46ea878c65942fd52147edAndy Shevchenko list_for_each_entry_safe(dtc, _dtc, &info->channels, node) { 77933df8ca068123457db56c316946a3c0e4ef787d6Dan Williams list_del(&dtc->node); 78033df8ca068123457db56c316946a3c0e4ef787d6Dan Williams chan = dtc->chan; 7814a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dmatest_cleanup_channel(dtc); 7824a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_debug("dmatest: dropped channel %s\n", dma_chan_name(chan)); 783a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams dma_release_channel(chan); 784a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams } 785a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams 786a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams info->nr_channels = 0; 787a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams} 788a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams 789a9e554957de406d6adc581731f571b8a1503f6b0Dan Williamsstatic void stop_threaded_test(struct dmatest_info *info) 790a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams{ 791a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams mutex_lock(&info->lock); 792a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams __stop_threaded_test(info); 793a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams mutex_unlock(&info->lock); 794a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams} 795a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams 796a9e554957de406d6adc581731f571b8a1503f6b0Dan Williamsstatic int __restart_threaded_test(struct dmatest_info *info, bool run) 797e3b9c347316fe243bea6abd08681050c43ca22eeDan Williams{ 798a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams struct dmatest_params *params = &info->params; 799a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams 800a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams /* Stop any running test first */ 801a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams __stop_threaded_test(info); 802a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams 803851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko if (run == false) 804a310d037b8d06755c62bb4878c00d19490af5550Dan Williams return 0; 8054a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 80633df8ca068123457db56c316946a3c0e4ef787d6Dan Williams /* Copy test parameters */ 8077cbd4877e5b167b56a3d6033b926a9f925186e12Dan Williams params->buf_size = test_buf_size; 80833df8ca068123457db56c316946a3c0e4ef787d6Dan Williams strlcpy(params->channel, strim(test_channel), sizeof(params->channel)); 809838cc704ce5c8ab2a6d64d1324e37e040fcae3d8Andy Shevchenko strlcpy(params->device, strim(test_device), sizeof(params->device)); 81033df8ca068123457db56c316946a3c0e4ef787d6Dan Williams params->threads_per_chan = threads_per_chan; 8117cbd4877e5b167b56a3d6033b926a9f925186e12Dan Williams params->max_channels = max_channels; 81233df8ca068123457db56c316946a3c0e4ef787d6Dan Williams params->iterations = iterations; 8130adff800662f52d0ffc3e420db231769cb3fff13Dan Williams params->xor_sources = xor_sources; 8147cbd4877e5b167b56a3d6033b926a9f925186e12Dan Williams params->pq_sources = pq_sources; 81533df8ca068123457db56c316946a3c0e4ef787d6Dan Williams params->timeout = timeout; 816838cc704ce5c8ab2a6d64d1324e37e040fcae3d8Andy Shevchenko 817838cc704ce5c8ab2a6d64d1324e37e040fcae3d8Andy Shevchenko /* Run test with new parameters */ 8184a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen return __run_threaded_test(info); 819e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko} 820a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams 821851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenkostatic bool __is_threaded_test_run(struct dmatest_info *info) 822a310d037b8d06755c62bb4878c00d19490af5550Dan Williams{ 823a310d037b8d06755c62bb4878c00d19490af5550Dan Williams struct dmatest_chan *dtc; 824a310d037b8d06755c62bb4878c00d19490af5550Dan Williams 825a310d037b8d06755c62bb4878c00d19490af5550Dan Williams list_for_each_entry(dtc, &info->channels, node) { 826a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams struct dmatest_thread *thread; 827851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko 828a310d037b8d06755c62bb4878c00d19490af5550Dan Williams list_for_each_entry(thread, &dtc->threads, node) { 829a310d037b8d06755c62bb4878c00d19490af5550Dan Williams if (!thread->done) 830851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko return true; 831851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko } 832a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams } 833bcc567e3115055a9cc256183d72864f01286be22Andy Shevchenko 834bcc567e3115055a9cc256183d72864f01286be22Andy Shevchenko return false; 835a310d037b8d06755c62bb4878c00d19490af5550Dan Williams} 836bcc567e3115055a9cc256183d72864f01286be22Andy Shevchenko 837bcc567e3115055a9cc256183d72864f01286be22Andy Shevchenkostatic ssize_t dtf_read_run(struct file *file, char __user *user_buf, 838bcc567e3115055a9cc256183d72864f01286be22Andy Shevchenko size_t count, loff_t *ppos) 839bcc567e3115055a9cc256183d72864f01286be22Andy Shevchenko{ 840bcc567e3115055a9cc256183d72864f01286be22Andy Shevchenko struct dmatest_info *info = file->private_data; 841bcc567e3115055a9cc256183d72864f01286be22Andy Shevchenko char buf[3]; 842bcc567e3115055a9cc256183d72864f01286be22Andy Shevchenko 843bcc567e3115055a9cc256183d72864f01286be22Andy Shevchenko mutex_lock(&info->lock); 844bcc567e3115055a9cc256183d72864f01286be22Andy Shevchenko 845bcc567e3115055a9cc256183d72864f01286be22Andy Shevchenko if (__is_threaded_test_run(info)) { 846851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko buf[0] = 'Y'; 847851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko } else { 848bcc567e3115055a9cc256183d72864f01286be22Andy Shevchenko __stop_threaded_test(info); 849851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko buf[0] = 'N'; 850851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko } 851a310d037b8d06755c62bb4878c00d19490af5550Dan Williams 852851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko mutex_unlock(&info->lock); 853a310d037b8d06755c62bb4878c00d19490af5550Dan Williams buf[1] = '\n'; 854851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko buf[2] = 0x00; 855851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko return simple_read_from_buffer(user_buf, count, ppos, buf, 2); 856a310d037b8d06755c62bb4878c00d19490af5550Dan Williams} 857a310d037b8d06755c62bb4878c00d19490af5550Dan Williams 8583e5ccd866fdf3a1e1d4d2c08c81f861ad6798d32Andy Shevchenkostatic ssize_t dtf_write_run(struct file *file, const char __user *user_buf, 859a310d037b8d06755c62bb4878c00d19490af5550Dan Williams size_t count, loff_t *ppos) 860a310d037b8d06755c62bb4878c00d19490af5550Dan Williams{ 8613e5ccd866fdf3a1e1d4d2c08c81f861ad6798d32Andy Shevchenko struct dmatest_info *info = file->private_data; 862851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko char buf[16]; 863a310d037b8d06755c62bb4878c00d19490af5550Dan Williams bool bv; 864a310d037b8d06755c62bb4878c00d19490af5550Dan Williams int ret = 0; 865851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko 866851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko if (copy_from_user(buf, user_buf, min(count, (sizeof(buf) - 1)))) 867a310d037b8d06755c62bb4878c00d19490af5550Dan Williams return -EFAULT; 868851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko 869a310d037b8d06755c62bb4878c00d19490af5550Dan Williams if (strtobool(buf, &bv) == 0) { 870a310d037b8d06755c62bb4878c00d19490af5550Dan Williams mutex_lock(&info->lock); 871bcc567e3115055a9cc256183d72864f01286be22Andy Shevchenko 872a310d037b8d06755c62bb4878c00d19490af5550Dan Williams if (__is_threaded_test_run(info)) 873a310d037b8d06755c62bb4878c00d19490af5550Dan Williams ret = -EBUSY; 874a310d037b8d06755c62bb4878c00d19490af5550Dan Williams else 875851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko ret = __restart_threaded_test(info, bv); 876a310d037b8d06755c62bb4878c00d19490af5550Dan Williams 877851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko mutex_unlock(&info->lock); 878851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko } 879a310d037b8d06755c62bb4878c00d19490af5550Dan Williams 880a310d037b8d06755c62bb4878c00d19490af5550Dan Williams return ret ? ret : count; 881a310d037b8d06755c62bb4878c00d19490af5550Dan Williams} 882a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams 883851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenkostatic const struct file_operations dtf_run_fops = { 884a310d037b8d06755c62bb4878c00d19490af5550Dan Williams .read = dtf_read_run, 885851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko .write = dtf_write_run, 886a310d037b8d06755c62bb4878c00d19490af5550Dan Williams .open = simple_open, 887851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko .llseek = default_llseek, 888851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko}; 889e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko 890e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenkostatic int dmatest_register_dbgfs(struct dmatest_info *info) 891e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko{ 892e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko struct dentry *d; 893a310d037b8d06755c62bb4878c00d19490af5550Dan Williams 894a310d037b8d06755c62bb4878c00d19490af5550Dan Williams d = debugfs_create_dir("dmatest", NULL); 895a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams if (IS_ERR(d)) 896a310d037b8d06755c62bb4878c00d19490af5550Dan Williams return PTR_ERR(d); 897a310d037b8d06755c62bb4878c00d19490af5550Dan Williams if (!d) 898838cc704ce5c8ab2a6d64d1324e37e040fcae3d8Andy Shevchenko goto err_root; 899a310d037b8d06755c62bb4878c00d19490af5550Dan Williams 900a310d037b8d06755c62bb4878c00d19490af5550Dan Williams info->root = d; 901a310d037b8d06755c62bb4878c00d19490af5550Dan Williams 902a310d037b8d06755c62bb4878c00d19490af5550Dan Williams /* Run or stop threaded test */ 903851b7e16a07dfda6178d4e35fea9a9e3eb8954aeAndy Shevchenko debugfs_create_file("run", S_IWUSR | S_IRUGO, info->root, info, 904a9e554957de406d6adc581731f571b8a1503f6b0Dan Williams &dtf_run_fops); 905e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko 906e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko return 0; 907e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko 908e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenkoerr_root: 909e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko pr_err("dmatest: Failed to initialize debugfs\n"); 910e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko return -ENOMEM; 911e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko} 912e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko 913a310d037b8d06755c62bb4878c00d19490af5550Dan Williamsstatic int __init dmatest_init(void) 914e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko{ 915a310d037b8d06755c62bb4878c00d19490af5550Dan Williams struct dmatest_info *info = &test_info; 916e03e93a976d0f0da63f02fd3384c4b99cac8d715Andy Shevchenko int ret; 9174a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 9184a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen memset(info, 0, sizeof(*info)); 919e05503ef1186ad33dfe56794407891eb1dd93ef6Jean Delvare 9204a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen mutex_init(&info->lock); 921 INIT_LIST_HEAD(&info->channels); 922 923 ret = dmatest_register_dbgfs(info); 924 if (ret) 925 return ret; 926 927#ifdef MODULE 928 return 0; 929#else 930 return run_threaded_test(info); 931#endif 932} 933/* when compiled-in wait for drivers to load first */ 934late_initcall(dmatest_init); 935 936static void __exit dmatest_exit(void) 937{ 938 struct dmatest_info *info = &test_info; 939 940 debugfs_remove_recursive(info->root); 941 stop_threaded_test(info); 942} 943module_exit(dmatest_exit); 944 945MODULE_AUTHOR("Haavard Skinnemoen (Atmel)"); 946MODULE_LICENSE("GPL v2"); 947