dmatest.c revision 06190d8415219d9eef7d8f04b52a109e34575a76
14a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen/* 24a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * DMA Engine test module 34a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * 44a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * Copyright (C) 2007 Atmel Corporation 54a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * 64a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * This program is free software; you can redistribute it and/or modify 74a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * it under the terms of the GNU General Public License version 2 as 84a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * published by the Free Software Foundation. 94a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen */ 104a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#include <linux/delay.h> 114a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#include <linux/dmaengine.h> 124a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#include <linux/init.h> 134a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#include <linux/kthread.h> 144a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#include <linux/module.h> 154a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#include <linux/moduleparam.h> 164a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#include <linux/random.h> 174a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#include <linux/wait.h> 184a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 194a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic unsigned int test_buf_size = 16384; 204a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenmodule_param(test_buf_size, uint, S_IRUGO); 214a776f0aa922a552460192c07b56f4fe9cd82632Haavard SkinnemoenMODULE_PARM_DESC(test_buf_size, "Size of the memcpy test buffer"); 224a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 2306190d8415219d9eef7d8f04b52a109e34575a76Kay Sieversstatic char test_channel[20]; 244a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenmodule_param_string(channel, test_channel, sizeof(test_channel), S_IRUGO); 254a776f0aa922a552460192c07b56f4fe9cd82632Haavard SkinnemoenMODULE_PARM_DESC(channel, "Bus ID of the channel to test (default: any)"); 264a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 2706190d8415219d9eef7d8f04b52a109e34575a76Kay Sieversstatic char test_device[20]; 284a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenmodule_param_string(device, test_device, sizeof(test_device), S_IRUGO); 294a776f0aa922a552460192c07b56f4fe9cd82632Haavard SkinnemoenMODULE_PARM_DESC(device, "Bus ID of the DMA Engine to test (default: any)"); 304a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 314a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic unsigned int threads_per_chan = 1; 324a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenmodule_param(threads_per_chan, uint, S_IRUGO); 334a776f0aa922a552460192c07b56f4fe9cd82632Haavard SkinnemoenMODULE_PARM_DESC(threads_per_chan, 344a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen "Number of threads to start per channel (default: 1)"); 354a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 364a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic unsigned int max_channels; 374a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenmodule_param(max_channels, uint, S_IRUGO); 384a776f0aa922a552460192c07b56f4fe9cd82632Haavard SkinnemoenMODULE_PARM_DESC(nr_channels, 394a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen "Maximum number of channels to use (default: all)"); 404a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 414a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen/* 424a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * Initialization patterns. All bytes in the source buffer has bit 7 434a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * set, all bytes in the destination buffer has bit 7 cleared. 444a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * 454a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * Bit 6 is set for all bytes which are to be copied by the DMA 464a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * engine. Bit 5 is set for all bytes which are to be overwritten by 474a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * the DMA engine. 484a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * 494a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * The remaining bits are the inverse of a counter which increments by 504a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * one for each byte address. 514a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen */ 524a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#define PATTERN_SRC 0x80 534a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#define PATTERN_DST 0x00 544a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#define PATTERN_COPY 0x40 554a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#define PATTERN_OVERWRITE 0x20 564a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen#define PATTERN_COUNT_MASK 0x1f 574a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 584a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstruct dmatest_thread { 594a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct list_head node; 604a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct task_struct *task; 614a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dma_chan *chan; 624a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen u8 *srcbuf; 634a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen u8 *dstbuf; 644a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen}; 654a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 664a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstruct dmatest_chan { 674a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct list_head node; 684a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dma_chan *chan; 694a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct list_head threads; 704a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen}; 714a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 724a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen/* 734a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * These are protected by dma_list_mutex since they're only used by 744a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * the DMA client event callback 754a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen */ 764a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic LIST_HEAD(dmatest_channels); 774a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic unsigned int nr_channels; 784a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 794a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic bool dmatest_match_channel(struct dma_chan *chan) 804a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen{ 814a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (test_channel[0] == '\0') 824a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen return true; 8306190d8415219d9eef7d8f04b52a109e34575a76Kay Sievers return strcmp(dev_name(&chan->dev), test_channel) == 0; 844a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen} 854a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 864a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic bool dmatest_match_device(struct dma_device *device) 874a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen{ 884a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (test_device[0] == '\0') 894a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen return true; 9006190d8415219d9eef7d8f04b52a109e34575a76Kay Sievers return strcmp(dev_name(device->dev), test_device) == 0; 914a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen} 924a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 934a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic unsigned long dmatest_random(void) 944a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen{ 954a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen unsigned long buf; 964a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 974a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen get_random_bytes(&buf, sizeof(buf)); 984a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen return buf; 994a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen} 1004a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 1014a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic void dmatest_init_srcbuf(u8 *buf, unsigned int start, unsigned int len) 1024a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen{ 1034a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen unsigned int i; 1044a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 1054a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen for (i = 0; i < start; i++) 1064a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK); 1074a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen for ( ; i < start + len; i++) 1084a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen buf[i] = PATTERN_SRC | PATTERN_COPY 1094a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen | (~i & PATTERN_COUNT_MASK);; 1104a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen for ( ; i < test_buf_size; i++) 1114a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK); 1124a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen} 1134a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 1144a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic void dmatest_init_dstbuf(u8 *buf, unsigned int start, unsigned int len) 1154a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen{ 1164a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen unsigned int i; 1174a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 1184a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen for (i = 0; i < start; i++) 1194a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK); 1204a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen for ( ; i < start + len; i++) 1214a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen buf[i] = PATTERN_DST | PATTERN_OVERWRITE 1224a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen | (~i & PATTERN_COUNT_MASK); 1234a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen for ( ; i < test_buf_size; i++) 1244a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK); 1254a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen} 1264a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 1274a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic void dmatest_mismatch(u8 actual, u8 pattern, unsigned int index, 1284a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen unsigned int counter, bool is_srcbuf) 1294a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen{ 1304a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen u8 diff = actual ^ pattern; 1314a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen u8 expected = pattern | (~counter & PATTERN_COUNT_MASK); 1324a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen const char *thread_name = current->comm; 1334a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 1344a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (is_srcbuf) 1354a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_warning("%s: srcbuf[0x%x] overwritten!" 1364a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen " Expected %02x, got %02x\n", 1374a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread_name, index, expected, actual); 1384a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen else if ((pattern & PATTERN_COPY) 1394a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen && (diff & (PATTERN_COPY | PATTERN_OVERWRITE))) 1404a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_warning("%s: dstbuf[0x%x] not copied!" 1414a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen " Expected %02x, got %02x\n", 1424a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread_name, index, expected, actual); 1434a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen else if (diff & PATTERN_SRC) 1444a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_warning("%s: dstbuf[0x%x] was copied!" 1454a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen " Expected %02x, got %02x\n", 1464a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread_name, index, expected, actual); 1474a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen else 1484a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_warning("%s: dstbuf[0x%x] mismatch!" 1494a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen " Expected %02x, got %02x\n", 1504a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread_name, index, expected, actual); 1514a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen} 1524a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 1534a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic unsigned int dmatest_verify(u8 *buf, unsigned int start, 1544a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen unsigned int end, unsigned int counter, u8 pattern, 1554a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen bool is_srcbuf) 1564a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen{ 1574a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen unsigned int i; 1584a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen unsigned int error_count = 0; 1594a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen u8 actual; 1604a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 1614a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen for (i = start; i < end; i++) { 1624a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen actual = buf[i]; 1634a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (actual != (pattern | (~counter & PATTERN_COUNT_MASK))) { 1644a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (error_count < 32) 1654a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dmatest_mismatch(actual, pattern, i, counter, 1664a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen is_srcbuf); 1674a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen error_count++; 1684a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen } 1694a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen counter++; 1704a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen } 1714a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 1724a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (error_count > 32) 1734a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_warning("%s: %u errors suppressed\n", 1744a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen current->comm, error_count - 32); 1754a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 1764a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen return error_count; 1774a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen} 1784a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 1794a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen/* 1804a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * This function repeatedly tests DMA transfers of various lengths and 1814a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * offsets until it is told to exit by kthread_stop(). There may be 1824a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * multiple threads running this function in parallel for a single 1834a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * channel, and there may be multiple channels being tested in 1844a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * parallel. 1854a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * 1864a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * Before each test, the source and destination buffer is initialized 1874a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * with a known pattern. This pattern is different depending on 1884a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * whether it's in an area which is supposed to be copied or 1894a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * overwritten, and different in the source and destination buffers. 1904a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * So if the DMA engine doesn't copy exactly what we tell it to copy, 1914a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * we'll notice. 1924a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen */ 1934a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic int dmatest_func(void *data) 1944a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen{ 1954a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dmatest_thread *thread = data; 1964a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dma_chan *chan; 1974a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen const char *thread_name; 1984a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen unsigned int src_off, dst_off, len; 1994a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen unsigned int error_count; 2004a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen unsigned int failed_tests = 0; 2014a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen unsigned int total_tests = 0; 2024a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dma_cookie_t cookie; 2034a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen enum dma_status status; 2044a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen int ret; 2054a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 2064a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread_name = current->comm; 2074a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 2084a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen ret = -ENOMEM; 2094a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread->srcbuf = kmalloc(test_buf_size, GFP_KERNEL); 2104a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (!thread->srcbuf) 2114a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen goto err_srcbuf; 2124a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread->dstbuf = kmalloc(test_buf_size, GFP_KERNEL); 2134a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (!thread->dstbuf) 2144a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen goto err_dstbuf; 2154a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 2164a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen smp_rmb(); 2174a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen chan = thread->chan; 2184a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dma_chan_get(chan); 2194a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 2204a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen while (!kthread_should_stop()) { 2214a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen total_tests++; 2224a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 2234a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen len = dmatest_random() % test_buf_size + 1; 2244a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen src_off = dmatest_random() % (test_buf_size - len + 1); 2254a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dst_off = dmatest_random() % (test_buf_size - len + 1); 2264a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 2274a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dmatest_init_srcbuf(thread->srcbuf, src_off, len); 2284a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dmatest_init_dstbuf(thread->dstbuf, dst_off, len); 2294a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 2304a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen cookie = dma_async_memcpy_buf_to_buf(chan, 2314a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread->dstbuf + dst_off, 2324a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread->srcbuf + src_off, 2334a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen len); 2344a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (dma_submit_error(cookie)) { 2354a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_warning("%s: #%u: submit error %d with src_off=0x%x " 2364a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen "dst_off=0x%x len=0x%x\n", 2374a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread_name, total_tests - 1, cookie, 2384a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen src_off, dst_off, len); 2394a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen msleep(100); 2404a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen failed_tests++; 2414a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen continue; 2424a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen } 2434a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dma_async_memcpy_issue_pending(chan); 2444a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 2454a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen do { 2464a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen msleep(1); 2474a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen status = dma_async_memcpy_complete( 2484a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen chan, cookie, NULL, NULL); 2494a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen } while (status == DMA_IN_PROGRESS); 2504a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 2514a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (status == DMA_ERROR) { 2524a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_warning("%s: #%u: error during copy\n", 2534a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread_name, total_tests - 1); 2544a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen failed_tests++; 2554a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen continue; 2564a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen } 2574a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 2584a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen error_count = 0; 2594a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 2604a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_debug("%s: verifying source buffer...\n", thread_name); 2614a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen error_count += dmatest_verify(thread->srcbuf, 0, src_off, 2624a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 0, PATTERN_SRC, true); 2634a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen error_count += dmatest_verify(thread->srcbuf, src_off, 2644a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen src_off + len, src_off, 2654a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen PATTERN_SRC | PATTERN_COPY, true); 2664a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen error_count += dmatest_verify(thread->srcbuf, src_off + len, 2674a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen test_buf_size, src_off + len, 2684a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen PATTERN_SRC, true); 2694a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 2704a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_debug("%s: verifying dest buffer...\n", 2714a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread->task->comm); 2724a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen error_count += dmatest_verify(thread->dstbuf, 0, dst_off, 2734a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 0, PATTERN_DST, false); 2744a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen error_count += dmatest_verify(thread->dstbuf, dst_off, 2754a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dst_off + len, src_off, 2764a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen PATTERN_SRC | PATTERN_COPY, false); 2774a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen error_count += dmatest_verify(thread->dstbuf, dst_off + len, 2784a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen test_buf_size, dst_off + len, 2794a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen PATTERN_DST, false); 2804a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 2814a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (error_count) { 2824a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_warning("%s: #%u: %u errors with " 2834a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen "src_off=0x%x dst_off=0x%x len=0x%x\n", 2844a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread_name, total_tests - 1, error_count, 2854a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen src_off, dst_off, len); 2864a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen failed_tests++; 2874a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen } else { 2884a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_debug("%s: #%u: No errors with " 2894a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen "src_off=0x%x dst_off=0x%x len=0x%x\n", 2904a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread_name, total_tests - 1, 2914a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen src_off, dst_off, len); 2924a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen } 2934a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen } 2944a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 2954a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen ret = 0; 2964a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dma_chan_put(chan); 2974a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen kfree(thread->dstbuf); 2984a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenerr_dstbuf: 2994a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen kfree(thread->srcbuf); 3004a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenerr_srcbuf: 3014a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_notice("%s: terminating after %u tests, %u failures (status %d)\n", 3024a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread_name, total_tests, failed_tests, ret); 3034a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen return ret; 3044a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen} 3054a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 3064a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic void dmatest_cleanup_channel(struct dmatest_chan *dtc) 3074a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen{ 3084a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dmatest_thread *thread; 3094a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dmatest_thread *_thread; 3104a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen int ret; 3114a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 3124a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen list_for_each_entry_safe(thread, _thread, &dtc->threads, node) { 3134a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen ret = kthread_stop(thread->task); 3144a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_debug("dmatest: thread %s exited with status %d\n", 3154a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread->task->comm, ret); 3164a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen list_del(&thread->node); 3174a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen kfree(thread); 3184a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen } 3194a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen kfree(dtc); 3204a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen} 3214a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 3224a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic enum dma_state_client dmatest_add_channel(struct dma_chan *chan) 3234a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen{ 3244a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dmatest_chan *dtc; 3254a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dmatest_thread *thread; 3264a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen unsigned int i; 3274a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 3286b3141962dc82cfe1c30afdf91d564b309859cbeTimur Tabi /* Have we already been told about this channel? */ 3296b3141962dc82cfe1c30afdf91d564b309859cbeTimur Tabi list_for_each_entry(dtc, &dmatest_channels, node) 3306b3141962dc82cfe1c30afdf91d564b309859cbeTimur Tabi if (dtc->chan == chan) 3316b3141962dc82cfe1c30afdf91d564b309859cbeTimur Tabi return DMA_DUP; 3326b3141962dc82cfe1c30afdf91d564b309859cbeTimur Tabi 3336fdb8bd47111d3f94be221082b725ec2dec1d5c7Andrew Morton dtc = kmalloc(sizeof(struct dmatest_chan), GFP_KERNEL); 3344a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (!dtc) { 33506190d8415219d9eef7d8f04b52a109e34575a76Kay Sievers pr_warning("dmatest: No memory for %s\n", dev_name(&chan->dev)); 3364a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen return DMA_NAK; 3374a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen } 3384a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 3394a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dtc->chan = chan; 3404a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen INIT_LIST_HEAD(&dtc->threads); 3414a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 3424a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen for (i = 0; i < threads_per_chan; i++) { 3434a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread = kzalloc(sizeof(struct dmatest_thread), GFP_KERNEL); 3444a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (!thread) { 3454a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_warning("dmatest: No memory for %s-test%u\n", 34606190d8415219d9eef7d8f04b52a109e34575a76Kay Sievers dev_name(&chan->dev), i); 3474a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen break; 3484a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen } 3494a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread->chan = dtc->chan; 3504a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen smp_wmb(); 3514a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen thread->task = kthread_run(dmatest_func, thread, "%s-test%u", 35206190d8415219d9eef7d8f04b52a109e34575a76Kay Sievers dev_name(&chan->dev), i); 3534a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (IS_ERR(thread->task)) { 3544a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_warning("dmatest: Failed to run thread %s-test%u\n", 35506190d8415219d9eef7d8f04b52a109e34575a76Kay Sievers dev_name(&chan->dev), i); 3564a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen kfree(thread); 3574a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen break; 3584a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen } 3594a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 3604a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen /* srcbuf and dstbuf are allocated by the thread itself */ 3614a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 3624a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen list_add_tail(&thread->node, &dtc->threads); 3634a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen } 3644a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 36506190d8415219d9eef7d8f04b52a109e34575a76Kay Sievers pr_info("dmatest: Started %u threads using %s\n", i, dev_name(&chan->dev)); 3664a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 3674a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen list_add_tail(&dtc->node, &dmatest_channels); 3684a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen nr_channels++; 3694a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 3704a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen return DMA_ACK; 3714a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen} 3724a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 3734a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic enum dma_state_client dmatest_remove_channel(struct dma_chan *chan) 3744a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen{ 3754a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen struct dmatest_chan *dtc, *_dtc; 3764a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 3774a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen list_for_each_entry_safe(dtc, _dtc, &dmatest_channels, node) { 3784a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (dtc->chan == chan) { 3794a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen list_del(&dtc->node); 3804a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dmatest_cleanup_channel(dtc); 3814a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_debug("dmatest: lost channel %s\n", 38206190d8415219d9eef7d8f04b52a109e34575a76Kay Sievers dev_name(&chan->dev)); 3834a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen return DMA_ACK; 3844a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen } 3854a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen } 3864a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 3874a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen return DMA_DUP; 3884a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen} 3894a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 3904a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen/* 3914a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * Start testing threads as new channels are assigned to us, and kill 3924a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * them when the channels go away. 3934a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * 3944a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * When we unregister the client, all channels are removed so this 3954a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * will also take care of cleaning things up when the module is 3964a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen * unloaded. 3974a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen */ 3984a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic enum dma_state_client 3994a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoendmatest_event(struct dma_client *client, struct dma_chan *chan, 4004a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen enum dma_state state) 4014a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen{ 4024a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen enum dma_state_client ack = DMA_NAK; 4034a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 4044a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen switch (state) { 4054a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen case DMA_RESOURCE_AVAILABLE: 4064a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen if (!dmatest_match_channel(chan) 4074a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen || !dmatest_match_device(chan->device)) 4084a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen ack = DMA_DUP; 4094a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen else if (max_channels && nr_channels >= max_channels) 4104a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen ack = DMA_NAK; 4114a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen else 4124a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen ack = dmatest_add_channel(chan); 4134a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen break; 4144a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 4154a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen case DMA_RESOURCE_REMOVED: 4164a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen ack = dmatest_remove_channel(chan); 4174a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen break; 4184a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 4194a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen default: 4204a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen pr_info("dmatest: Unhandled event %u (%s)\n", 42106190d8415219d9eef7d8f04b52a109e34575a76Kay Sievers state, dev_name(&chan->dev)); 4224a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen break; 4234a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen } 4244a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 4254a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen return ack; 4264a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen} 4274a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 4284a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic struct dma_client dmatest_client = { 4294a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen .event_callback = dmatest_event, 4304a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen}; 4314a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 4324a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic int __init dmatest_init(void) 4334a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen{ 4344a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dma_cap_set(DMA_MEMCPY, dmatest_client.cap_mask); 4354a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dma_async_client_register(&dmatest_client); 4364a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dma_async_client_chan_request(&dmatest_client); 4374a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 4384a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen return 0; 4394a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen} 4404a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenmodule_init(dmatest_init); 4414a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 4424a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenstatic void __exit dmatest_exit(void) 4434a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen{ 4444a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen dma_async_client_unregister(&dmatest_client); 4454a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen} 4464a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoenmodule_exit(dmatest_exit); 4474a776f0aa922a552460192c07b56f4fe9cd82632Haavard Skinnemoen 4484a776f0aa922a552460192c07b56f4fe9cd82632Haavard SkinnemoenMODULE_AUTHOR("Haavard Skinnemoen <hskinnemoen@atmel.com>"); 4494a776f0aa922a552460192c07b56f4fe9cd82632Haavard SkinnemoenMODULE_LICENSE("GPL v2"); 450