![Andy Shevchenko](/assets/img/avatar_default.png)
Comparison between buffers is stored to the dedicated structure. Note that the verify result is now accessible only via file 'results' in the debugfs. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
1321 lines
33 KiB
C
1321 lines
33 KiB
C
/*
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* DMA Engine test module
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*
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* Copyright (C) 2007 Atmel Corporation
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* Copyright (C) 2013 Intel Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/delay.h>
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#include <linux/dma-mapping.h>
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#include <linux/dmaengine.h>
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#include <linux/freezer.h>
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#include <linux/init.h>
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#include <linux/kthread.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/random.h>
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#include <linux/slab.h>
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#include <linux/wait.h>
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#include <linux/ctype.h>
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#include <linux/debugfs.h>
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#include <linux/uaccess.h>
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#include <linux/seq_file.h>
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static unsigned int test_buf_size = 16384;
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module_param(test_buf_size, uint, S_IRUGO);
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MODULE_PARM_DESC(test_buf_size, "Size of the memcpy test buffer");
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static char test_channel[20];
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module_param_string(channel, test_channel, sizeof(test_channel), S_IRUGO);
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MODULE_PARM_DESC(channel, "Bus ID of the channel to test (default: any)");
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static char test_device[20];
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module_param_string(device, test_device, sizeof(test_device), S_IRUGO);
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MODULE_PARM_DESC(device, "Bus ID of the DMA Engine to test (default: any)");
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static unsigned int threads_per_chan = 1;
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module_param(threads_per_chan, uint, S_IRUGO);
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MODULE_PARM_DESC(threads_per_chan,
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"Number of threads to start per channel (default: 1)");
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static unsigned int max_channels;
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module_param(max_channels, uint, S_IRUGO);
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MODULE_PARM_DESC(max_channels,
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"Maximum number of channels to use (default: all)");
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static unsigned int iterations;
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module_param(iterations, uint, S_IRUGO);
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MODULE_PARM_DESC(iterations,
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"Iterations before stopping test (default: infinite)");
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static unsigned int xor_sources = 3;
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module_param(xor_sources, uint, S_IRUGO);
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MODULE_PARM_DESC(xor_sources,
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"Number of xor source buffers (default: 3)");
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static unsigned int pq_sources = 3;
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module_param(pq_sources, uint, S_IRUGO);
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MODULE_PARM_DESC(pq_sources,
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"Number of p+q source buffers (default: 3)");
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static int timeout = 3000;
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module_param(timeout, uint, S_IRUGO);
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MODULE_PARM_DESC(timeout, "Transfer Timeout in msec (default: 3000), "
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"Pass -1 for infinite timeout");
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/* Maximum amount of mismatched bytes in buffer to print */
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#define MAX_ERROR_COUNT 32
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/*
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* Initialization patterns. All bytes in the source buffer has bit 7
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* set, all bytes in the destination buffer has bit 7 cleared.
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*
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* Bit 6 is set for all bytes which are to be copied by the DMA
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* engine. Bit 5 is set for all bytes which are to be overwritten by
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* the DMA engine.
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*
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* The remaining bits are the inverse of a counter which increments by
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* one for each byte address.
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*/
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#define PATTERN_SRC 0x80
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#define PATTERN_DST 0x00
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#define PATTERN_COPY 0x40
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#define PATTERN_OVERWRITE 0x20
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#define PATTERN_COUNT_MASK 0x1f
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enum dmatest_error_type {
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DMATEST_ET_OK,
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DMATEST_ET_MAP_SRC,
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DMATEST_ET_MAP_DST,
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DMATEST_ET_PREP,
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DMATEST_ET_SUBMIT,
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DMATEST_ET_TIMEOUT,
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DMATEST_ET_DMA_ERROR,
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DMATEST_ET_DMA_IN_PROGRESS,
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DMATEST_ET_VERIFY,
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DMATEST_ET_VERIFY_BUF,
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};
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struct dmatest_verify_buffer {
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unsigned int index;
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u8 expected;
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u8 actual;
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};
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struct dmatest_verify_result {
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unsigned int error_count;
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struct dmatest_verify_buffer data[MAX_ERROR_COUNT];
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u8 pattern;
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bool is_srcbuf;
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};
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struct dmatest_thread_result {
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struct list_head node;
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unsigned int n;
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unsigned int src_off;
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unsigned int dst_off;
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unsigned int len;
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enum dmatest_error_type type;
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union {
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unsigned long data;
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dma_cookie_t cookie;
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enum dma_status status;
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int error;
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struct dmatest_verify_result *vr;
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};
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};
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struct dmatest_result {
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struct list_head node;
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char *name;
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struct list_head results;
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};
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struct dmatest_info;
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struct dmatest_thread {
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struct list_head node;
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struct dmatest_info *info;
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struct task_struct *task;
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struct dma_chan *chan;
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u8 **srcs;
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u8 **dsts;
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enum dma_transaction_type type;
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bool done;
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};
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struct dmatest_chan {
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struct list_head node;
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struct dma_chan *chan;
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struct list_head threads;
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};
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/**
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* struct dmatest_params - test parameters.
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* @buf_size: size of the memcpy test buffer
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* @channel: bus ID of the channel to test
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* @device: bus ID of the DMA Engine to test
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* @threads_per_chan: number of threads to start per channel
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* @max_channels: maximum number of channels to use
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* @iterations: iterations before stopping test
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* @xor_sources: number of xor source buffers
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* @pq_sources: number of p+q source buffers
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* @timeout: transfer timeout in msec, -1 for infinite timeout
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*/
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struct dmatest_params {
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unsigned int buf_size;
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char channel[20];
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char device[20];
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unsigned int threads_per_chan;
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unsigned int max_channels;
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unsigned int iterations;
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unsigned int xor_sources;
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unsigned int pq_sources;
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int timeout;
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};
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/**
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* struct dmatest_info - test information.
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* @params: test parameters
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* @lock: access protection to the fields of this structure
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*/
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struct dmatest_info {
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/* Test parameters */
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struct dmatest_params params;
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/* Internal state */
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struct list_head channels;
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unsigned int nr_channels;
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struct mutex lock;
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/* debugfs related stuff */
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struct dentry *root;
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struct dmatest_params dbgfs_params;
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/* Test results */
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struct list_head results;
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struct mutex results_lock;
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};
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static struct dmatest_info test_info;
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static bool dmatest_match_channel(struct dmatest_params *params,
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struct dma_chan *chan)
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{
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if (params->channel[0] == '\0')
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return true;
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return strcmp(dma_chan_name(chan), params->channel) == 0;
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}
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static bool dmatest_match_device(struct dmatest_params *params,
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struct dma_device *device)
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{
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if (params->device[0] == '\0')
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return true;
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return strcmp(dev_name(device->dev), params->device) == 0;
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}
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static unsigned long dmatest_random(void)
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{
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unsigned long buf;
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get_random_bytes(&buf, sizeof(buf));
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return buf;
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}
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static void dmatest_init_srcs(u8 **bufs, unsigned int start, unsigned int len,
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unsigned int buf_size)
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{
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unsigned int i;
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u8 *buf;
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for (; (buf = *bufs); bufs++) {
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for (i = 0; i < start; i++)
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buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK);
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for ( ; i < start + len; i++)
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buf[i] = PATTERN_SRC | PATTERN_COPY
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| (~i & PATTERN_COUNT_MASK);
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for ( ; i < buf_size; i++)
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buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK);
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buf++;
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}
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}
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static void dmatest_init_dsts(u8 **bufs, unsigned int start, unsigned int len,
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unsigned int buf_size)
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{
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unsigned int i;
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u8 *buf;
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for (; (buf = *bufs); bufs++) {
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for (i = 0; i < start; i++)
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buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK);
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for ( ; i < start + len; i++)
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buf[i] = PATTERN_DST | PATTERN_OVERWRITE
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| (~i & PATTERN_COUNT_MASK);
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for ( ; i < buf_size; i++)
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buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK);
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}
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}
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static unsigned int dmatest_verify(struct dmatest_verify_result *vr, u8 **bufs,
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unsigned int start, unsigned int end, unsigned int counter,
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u8 pattern, bool is_srcbuf)
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{
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unsigned int i;
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unsigned int error_count = 0;
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u8 actual;
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u8 expected;
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u8 *buf;
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unsigned int counter_orig = counter;
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struct dmatest_verify_buffer *vb;
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for (; (buf = *bufs); bufs++) {
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counter = counter_orig;
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for (i = start; i < end; i++) {
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actual = buf[i];
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expected = pattern | (~counter & PATTERN_COUNT_MASK);
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if (actual != expected) {
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if (error_count < MAX_ERROR_COUNT && vr) {
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vb = &vr->data[error_count];
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vb->index = i;
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vb->expected = expected;
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vb->actual = actual;
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}
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error_count++;
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}
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counter++;
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}
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}
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if (error_count > MAX_ERROR_COUNT)
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pr_warning("%s: %u errors suppressed\n",
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current->comm, error_count - MAX_ERROR_COUNT);
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return error_count;
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}
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/* poor man's completion - we want to use wait_event_freezable() on it */
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struct dmatest_done {
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bool done;
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wait_queue_head_t *wait;
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};
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static void dmatest_callback(void *arg)
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{
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struct dmatest_done *done = arg;
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done->done = true;
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wake_up_all(done->wait);
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}
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static inline void unmap_src(struct device *dev, dma_addr_t *addr, size_t len,
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unsigned int count)
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{
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while (count--)
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dma_unmap_single(dev, addr[count], len, DMA_TO_DEVICE);
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}
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static inline void unmap_dst(struct device *dev, dma_addr_t *addr, size_t len,
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unsigned int count)
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{
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while (count--)
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dma_unmap_single(dev, addr[count], len, DMA_BIDIRECTIONAL);
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}
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static unsigned int min_odd(unsigned int x, unsigned int y)
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{
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unsigned int val = min(x, y);
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return val % 2 ? val : val - 1;
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}
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static char *verify_result_get_one(struct dmatest_verify_result *vr,
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unsigned int i)
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{
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struct dmatest_verify_buffer *vb = &vr->data[i];
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u8 diff = vb->actual ^ vr->pattern;
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static char buf[512];
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char *msg;
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if (vr->is_srcbuf)
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msg = "srcbuf overwritten!";
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else if ((vr->pattern & PATTERN_COPY)
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&& (diff & (PATTERN_COPY | PATTERN_OVERWRITE)))
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msg = "dstbuf not copied!";
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else if (diff & PATTERN_SRC)
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msg = "dstbuf was copied!";
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else
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msg = "dstbuf mismatch!";
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snprintf(buf, sizeof(buf) - 1, "%s [0x%x] Expected %02x, got %02x", msg,
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vb->index, vb->expected, vb->actual);
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return buf;
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}
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static char *thread_result_get(const char *name,
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struct dmatest_thread_result *tr)
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{
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static const char * const messages[] = {
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[DMATEST_ET_OK] = "No errors",
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[DMATEST_ET_MAP_SRC] = "src mapping error",
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[DMATEST_ET_MAP_DST] = "dst mapping error",
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[DMATEST_ET_PREP] = "prep error",
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[DMATEST_ET_SUBMIT] = "submit error",
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[DMATEST_ET_TIMEOUT] = "test timed out",
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[DMATEST_ET_DMA_ERROR] =
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"got completion callback (DMA_ERROR)",
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[DMATEST_ET_DMA_IN_PROGRESS] =
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"got completion callback (DMA_IN_PROGRESS)",
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[DMATEST_ET_VERIFY] = "errors",
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[DMATEST_ET_VERIFY_BUF] = "verify errors",
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};
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static char buf[512];
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snprintf(buf, sizeof(buf) - 1,
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"%s: #%u: %s with src_off=0x%x ""dst_off=0x%x len=0x%x (%lu)",
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name, tr->n, messages[tr->type], tr->src_off, tr->dst_off,
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tr->len, tr->data);
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return buf;
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}
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static int thread_result_add(struct dmatest_info *info,
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struct dmatest_result *r, enum dmatest_error_type type,
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unsigned int n, unsigned int src_off, unsigned int dst_off,
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unsigned int len, unsigned long data)
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{
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struct dmatest_thread_result *tr;
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tr = kzalloc(sizeof(*tr), GFP_KERNEL);
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if (!tr)
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return -ENOMEM;
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tr->type = type;
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tr->n = n;
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tr->src_off = src_off;
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tr->dst_off = dst_off;
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tr->len = len;
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tr->data = data;
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mutex_lock(&info->results_lock);
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list_add_tail(&tr->node, &r->results);
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mutex_unlock(&info->results_lock);
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pr_warn("%s\n", thread_result_get(r->name, tr));
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return 0;
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}
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static unsigned int verify_result_add(struct dmatest_info *info,
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struct dmatest_result *r, unsigned int n,
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unsigned int src_off, unsigned int dst_off, unsigned int len,
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u8 **bufs, int whence, unsigned int counter, u8 pattern,
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bool is_srcbuf)
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{
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struct dmatest_verify_result *vr;
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unsigned int error_count;
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unsigned int buf_off = is_srcbuf ? src_off : dst_off;
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unsigned int start, end;
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if (whence < 0) {
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start = 0;
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end = buf_off;
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} else if (whence > 0) {
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start = buf_off + len;
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end = info->params.buf_size;
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} else {
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start = buf_off;
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end = buf_off + len;
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}
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vr = kmalloc(sizeof(*vr), GFP_KERNEL);
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if (!vr) {
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pr_warn("dmatest: No memory to store verify result\n");
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return dmatest_verify(NULL, bufs, start, end, counter, pattern,
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is_srcbuf);
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}
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vr->pattern = pattern;
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vr->is_srcbuf = is_srcbuf;
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error_count = dmatest_verify(vr, bufs, start, end, counter, pattern,
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is_srcbuf);
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if (error_count) {
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vr->error_count = error_count;
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thread_result_add(info, r, DMATEST_ET_VERIFY_BUF, n, src_off,
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dst_off, len, (unsigned long)vr);
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return error_count;
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}
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kfree(vr);
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return 0;
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}
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static void result_free(struct dmatest_info *info, const char *name)
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{
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struct dmatest_result *r, *_r;
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mutex_lock(&info->results_lock);
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list_for_each_entry_safe(r, _r, &info->results, node) {
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struct dmatest_thread_result *tr, *_tr;
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if (name && strcmp(r->name, name))
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continue;
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list_for_each_entry_safe(tr, _tr, &r->results, node) {
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if (tr->type == DMATEST_ET_VERIFY_BUF)
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kfree(tr->vr);
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list_del(&tr->node);
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kfree(tr);
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}
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kfree(r->name);
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list_del(&r->node);
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kfree(r);
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}
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mutex_unlock(&info->results_lock);
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}
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static struct dmatest_result *result_init(struct dmatest_info *info,
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const char *name)
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{
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struct dmatest_result *r;
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r = kzalloc(sizeof(*r), GFP_KERNEL);
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if (r) {
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r->name = kstrdup(name, GFP_KERNEL);
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INIT_LIST_HEAD(&r->results);
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mutex_lock(&info->results_lock);
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list_add_tail(&r->node, &info->results);
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mutex_unlock(&info->results_lock);
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}
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return r;
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}
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/*
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* This function repeatedly tests DMA transfers of various lengths and
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* offsets for a given operation type until it is told to exit by
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* kthread_stop(). There may be multiple threads running this function
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* in parallel for a single channel, and there may be multiple channels
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* being tested in parallel.
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*
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* Before each test, the source and destination buffer is initialized
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* with a known pattern. This pattern is different depending on
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* whether it's in an area which is supposed to be copied or
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* overwritten, and different in the source and destination buffers.
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* So if the DMA engine doesn't copy exactly what we tell it to copy,
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* we'll notice.
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*/
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static int dmatest_func(void *data)
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{
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DECLARE_WAIT_QUEUE_HEAD_ONSTACK(done_wait);
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struct dmatest_thread *thread = data;
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struct dmatest_done done = { .wait = &done_wait };
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|
struct dmatest_info *info;
|
|
struct dmatest_params *params;
|
|
struct dma_chan *chan;
|
|
struct dma_device *dev;
|
|
const char *thread_name;
|
|
unsigned int src_off, dst_off, len;
|
|
unsigned int error_count;
|
|
unsigned int failed_tests = 0;
|
|
unsigned int total_tests = 0;
|
|
dma_cookie_t cookie;
|
|
enum dma_status status;
|
|
enum dma_ctrl_flags flags;
|
|
u8 *pq_coefs = NULL;
|
|
int ret;
|
|
int src_cnt;
|
|
int dst_cnt;
|
|
int i;
|
|
struct dmatest_result *result;
|
|
|
|
thread_name = current->comm;
|
|
set_freezable();
|
|
|
|
ret = -ENOMEM;
|
|
|
|
smp_rmb();
|
|
info = thread->info;
|
|
params = &info->params;
|
|
chan = thread->chan;
|
|
dev = chan->device;
|
|
if (thread->type == DMA_MEMCPY)
|
|
src_cnt = dst_cnt = 1;
|
|
else if (thread->type == DMA_XOR) {
|
|
/* force odd to ensure dst = src */
|
|
src_cnt = min_odd(params->xor_sources | 1, dev->max_xor);
|
|
dst_cnt = 1;
|
|
} else if (thread->type == DMA_PQ) {
|
|
/* force odd to ensure dst = src */
|
|
src_cnt = min_odd(params->pq_sources | 1, dma_maxpq(dev, 0));
|
|
dst_cnt = 2;
|
|
|
|
pq_coefs = kmalloc(params->pq_sources+1, GFP_KERNEL);
|
|
if (!pq_coefs)
|
|
goto err_thread_type;
|
|
|
|
for (i = 0; i < src_cnt; i++)
|
|
pq_coefs[i] = 1;
|
|
} else
|
|
goto err_thread_type;
|
|
|
|
result = result_init(info, thread_name);
|
|
if (!result)
|
|
goto err_srcs;
|
|
|
|
thread->srcs = kcalloc(src_cnt+1, sizeof(u8 *), GFP_KERNEL);
|
|
if (!thread->srcs)
|
|
goto err_srcs;
|
|
for (i = 0; i < src_cnt; i++) {
|
|
thread->srcs[i] = kmalloc(params->buf_size, GFP_KERNEL);
|
|
if (!thread->srcs[i])
|
|
goto err_srcbuf;
|
|
}
|
|
thread->srcs[i] = NULL;
|
|
|
|
thread->dsts = kcalloc(dst_cnt+1, sizeof(u8 *), GFP_KERNEL);
|
|
if (!thread->dsts)
|
|
goto err_dsts;
|
|
for (i = 0; i < dst_cnt; i++) {
|
|
thread->dsts[i] = kmalloc(params->buf_size, GFP_KERNEL);
|
|
if (!thread->dsts[i])
|
|
goto err_dstbuf;
|
|
}
|
|
thread->dsts[i] = NULL;
|
|
|
|
set_user_nice(current, 10);
|
|
|
|
/*
|
|
* src buffers are freed by the DMAEngine code with dma_unmap_single()
|
|
* dst buffers are freed by ourselves below
|
|
*/
|
|
flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT
|
|
| DMA_COMPL_SKIP_DEST_UNMAP | DMA_COMPL_SRC_UNMAP_SINGLE;
|
|
|
|
while (!kthread_should_stop()
|
|
&& !(params->iterations && total_tests >= params->iterations)) {
|
|
struct dma_async_tx_descriptor *tx = NULL;
|
|
dma_addr_t dma_srcs[src_cnt];
|
|
dma_addr_t dma_dsts[dst_cnt];
|
|
u8 align = 0;
|
|
|
|
total_tests++;
|
|
|
|
/* honor alignment restrictions */
|
|
if (thread->type == DMA_MEMCPY)
|
|
align = dev->copy_align;
|
|
else if (thread->type == DMA_XOR)
|
|
align = dev->xor_align;
|
|
else if (thread->type == DMA_PQ)
|
|
align = dev->pq_align;
|
|
|
|
if (1 << align > params->buf_size) {
|
|
pr_err("%u-byte buffer too small for %d-byte alignment\n",
|
|
params->buf_size, 1 << align);
|
|
break;
|
|
}
|
|
|
|
len = dmatest_random() % params->buf_size + 1;
|
|
len = (len >> align) << align;
|
|
if (!len)
|
|
len = 1 << align;
|
|
src_off = dmatest_random() % (params->buf_size - len + 1);
|
|
dst_off = dmatest_random() % (params->buf_size - len + 1);
|
|
|
|
src_off = (src_off >> align) << align;
|
|
dst_off = (dst_off >> align) << align;
|
|
|
|
dmatest_init_srcs(thread->srcs, src_off, len, params->buf_size);
|
|
dmatest_init_dsts(thread->dsts, dst_off, len, params->buf_size);
|
|
|
|
for (i = 0; i < src_cnt; i++) {
|
|
u8 *buf = thread->srcs[i] + src_off;
|
|
|
|
dma_srcs[i] = dma_map_single(dev->dev, buf, len,
|
|
DMA_TO_DEVICE);
|
|
ret = dma_mapping_error(dev->dev, dma_srcs[i]);
|
|
if (ret) {
|
|
unmap_src(dev->dev, dma_srcs, len, i);
|
|
thread_result_add(info, result,
|
|
DMATEST_ET_MAP_SRC,
|
|
total_tests, src_off, dst_off,
|
|
len, ret);
|
|
failed_tests++;
|
|
continue;
|
|
}
|
|
}
|
|
/* map with DMA_BIDIRECTIONAL to force writeback/invalidate */
|
|
for (i = 0; i < dst_cnt; i++) {
|
|
dma_dsts[i] = dma_map_single(dev->dev, thread->dsts[i],
|
|
params->buf_size,
|
|
DMA_BIDIRECTIONAL);
|
|
ret = dma_mapping_error(dev->dev, dma_dsts[i]);
|
|
if (ret) {
|
|
unmap_src(dev->dev, dma_srcs, len, src_cnt);
|
|
unmap_dst(dev->dev, dma_dsts, params->buf_size,
|
|
i);
|
|
thread_result_add(info, result,
|
|
DMATEST_ET_MAP_DST,
|
|
total_tests, src_off, dst_off,
|
|
len, ret);
|
|
failed_tests++;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (thread->type == DMA_MEMCPY)
|
|
tx = dev->device_prep_dma_memcpy(chan,
|
|
dma_dsts[0] + dst_off,
|
|
dma_srcs[0], len,
|
|
flags);
|
|
else if (thread->type == DMA_XOR)
|
|
tx = dev->device_prep_dma_xor(chan,
|
|
dma_dsts[0] + dst_off,
|
|
dma_srcs, src_cnt,
|
|
len, flags);
|
|
else if (thread->type == DMA_PQ) {
|
|
dma_addr_t dma_pq[dst_cnt];
|
|
|
|
for (i = 0; i < dst_cnt; i++)
|
|
dma_pq[i] = dma_dsts[i] + dst_off;
|
|
tx = dev->device_prep_dma_pq(chan, dma_pq, dma_srcs,
|
|
src_cnt, pq_coefs,
|
|
len, flags);
|
|
}
|
|
|
|
if (!tx) {
|
|
unmap_src(dev->dev, dma_srcs, len, src_cnt);
|
|
unmap_dst(dev->dev, dma_dsts, params->buf_size,
|
|
dst_cnt);
|
|
thread_result_add(info, result, DMATEST_ET_PREP,
|
|
total_tests, src_off, dst_off,
|
|
len, 0);
|
|
msleep(100);
|
|
failed_tests++;
|
|
continue;
|
|
}
|
|
|
|
done.done = false;
|
|
tx->callback = dmatest_callback;
|
|
tx->callback_param = &done;
|
|
cookie = tx->tx_submit(tx);
|
|
|
|
if (dma_submit_error(cookie)) {
|
|
thread_result_add(info, result, DMATEST_ET_SUBMIT,
|
|
total_tests, src_off, dst_off,
|
|
len, cookie);
|
|
msleep(100);
|
|
failed_tests++;
|
|
continue;
|
|
}
|
|
dma_async_issue_pending(chan);
|
|
|
|
wait_event_freezable_timeout(done_wait,
|
|
done.done || kthread_should_stop(),
|
|
msecs_to_jiffies(params->timeout));
|
|
|
|
status = dma_async_is_tx_complete(chan, cookie, NULL, NULL);
|
|
|
|
if (!done.done) {
|
|
/*
|
|
* We're leaving the timed out dma operation with
|
|
* dangling pointer to done_wait. To make this
|
|
* correct, we'll need to allocate wait_done for
|
|
* each test iteration and perform "who's gonna
|
|
* free it this time?" dancing. For now, just
|
|
* leave it dangling.
|
|
*/
|
|
thread_result_add(info, result, DMATEST_ET_TIMEOUT,
|
|
total_tests, src_off, dst_off,
|
|
len, 0);
|
|
failed_tests++;
|
|
continue;
|
|
} else if (status != DMA_SUCCESS) {
|
|
enum dmatest_error_type type = (status == DMA_ERROR) ?
|
|
DMATEST_ET_DMA_ERROR : DMATEST_ET_DMA_IN_PROGRESS;
|
|
thread_result_add(info, result, type,
|
|
total_tests, src_off, dst_off,
|
|
len, status);
|
|
failed_tests++;
|
|
continue;
|
|
}
|
|
|
|
/* Unmap by myself (see DMA_COMPL_SKIP_DEST_UNMAP above) */
|
|
unmap_dst(dev->dev, dma_dsts, params->buf_size, dst_cnt);
|
|
|
|
error_count = 0;
|
|
|
|
pr_debug("%s: verifying source buffer...\n", thread_name);
|
|
error_count += verify_result_add(info, result, total_tests,
|
|
src_off, dst_off, len, thread->srcs, -1,
|
|
0, PATTERN_SRC, true);
|
|
error_count += verify_result_add(info, result, total_tests,
|
|
src_off, dst_off, len, thread->srcs, 0,
|
|
src_off, PATTERN_SRC | PATTERN_COPY, true);
|
|
error_count += verify_result_add(info, result, total_tests,
|
|
src_off, dst_off, len, thread->srcs, 1,
|
|
src_off + len, PATTERN_SRC, true);
|
|
|
|
pr_debug("%s: verifying dest buffer...\n", thread_name);
|
|
error_count += verify_result_add(info, result, total_tests,
|
|
src_off, dst_off, len, thread->dsts, -1,
|
|
0, PATTERN_DST, false);
|
|
error_count += verify_result_add(info, result, total_tests,
|
|
src_off, dst_off, len, thread->dsts, 0,
|
|
src_off, PATTERN_SRC | PATTERN_COPY, false);
|
|
error_count += verify_result_add(info, result, total_tests,
|
|
src_off, dst_off, len, thread->dsts, 1,
|
|
dst_off + len, PATTERN_DST, false);
|
|
|
|
if (error_count) {
|
|
thread_result_add(info, result, DMATEST_ET_VERIFY,
|
|
total_tests, src_off, dst_off,
|
|
len, error_count);
|
|
failed_tests++;
|
|
} else {
|
|
thread_result_add(info, result, DMATEST_ET_OK,
|
|
total_tests, src_off, dst_off,
|
|
len, 0);
|
|
}
|
|
}
|
|
|
|
ret = 0;
|
|
for (i = 0; thread->dsts[i]; i++)
|
|
kfree(thread->dsts[i]);
|
|
err_dstbuf:
|
|
kfree(thread->dsts);
|
|
err_dsts:
|
|
for (i = 0; thread->srcs[i]; i++)
|
|
kfree(thread->srcs[i]);
|
|
err_srcbuf:
|
|
kfree(thread->srcs);
|
|
err_srcs:
|
|
kfree(pq_coefs);
|
|
err_thread_type:
|
|
pr_notice("%s: terminating after %u tests, %u failures (status %d)\n",
|
|
thread_name, total_tests, failed_tests, ret);
|
|
|
|
/* terminate all transfers on specified channels */
|
|
if (ret)
|
|
dmaengine_terminate_all(chan);
|
|
|
|
thread->done = true;
|
|
|
|
if (params->iterations > 0)
|
|
while (!kthread_should_stop()) {
|
|
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wait_dmatest_exit);
|
|
interruptible_sleep_on(&wait_dmatest_exit);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void dmatest_cleanup_channel(struct dmatest_chan *dtc)
|
|
{
|
|
struct dmatest_thread *thread;
|
|
struct dmatest_thread *_thread;
|
|
int ret;
|
|
|
|
list_for_each_entry_safe(thread, _thread, &dtc->threads, node) {
|
|
ret = kthread_stop(thread->task);
|
|
pr_debug("dmatest: thread %s exited with status %d\n",
|
|
thread->task->comm, ret);
|
|
list_del(&thread->node);
|
|
kfree(thread);
|
|
}
|
|
|
|
/* terminate all transfers on specified channels */
|
|
dmaengine_terminate_all(dtc->chan);
|
|
|
|
kfree(dtc);
|
|
}
|
|
|
|
static int dmatest_add_threads(struct dmatest_info *info,
|
|
struct dmatest_chan *dtc, enum dma_transaction_type type)
|
|
{
|
|
struct dmatest_params *params = &info->params;
|
|
struct dmatest_thread *thread;
|
|
struct dma_chan *chan = dtc->chan;
|
|
char *op;
|
|
unsigned int i;
|
|
|
|
if (type == DMA_MEMCPY)
|
|
op = "copy";
|
|
else if (type == DMA_XOR)
|
|
op = "xor";
|
|
else if (type == DMA_PQ)
|
|
op = "pq";
|
|
else
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < params->threads_per_chan; i++) {
|
|
thread = kzalloc(sizeof(struct dmatest_thread), GFP_KERNEL);
|
|
if (!thread) {
|
|
pr_warning("dmatest: No memory for %s-%s%u\n",
|
|
dma_chan_name(chan), op, i);
|
|
|
|
break;
|
|
}
|
|
thread->info = info;
|
|
thread->chan = dtc->chan;
|
|
thread->type = type;
|
|
smp_wmb();
|
|
thread->task = kthread_run(dmatest_func, thread, "%s-%s%u",
|
|
dma_chan_name(chan), op, i);
|
|
if (IS_ERR(thread->task)) {
|
|
pr_warning("dmatest: Failed to run thread %s-%s%u\n",
|
|
dma_chan_name(chan), op, i);
|
|
kfree(thread);
|
|
break;
|
|
}
|
|
|
|
/* srcbuf and dstbuf are allocated by the thread itself */
|
|
|
|
list_add_tail(&thread->node, &dtc->threads);
|
|
}
|
|
|
|
return i;
|
|
}
|
|
|
|
static int dmatest_add_channel(struct dmatest_info *info,
|
|
struct dma_chan *chan)
|
|
{
|
|
struct dmatest_chan *dtc;
|
|
struct dma_device *dma_dev = chan->device;
|
|
unsigned int thread_count = 0;
|
|
int cnt;
|
|
|
|
dtc = kmalloc(sizeof(struct dmatest_chan), GFP_KERNEL);
|
|
if (!dtc) {
|
|
pr_warning("dmatest: No memory for %s\n", dma_chan_name(chan));
|
|
return -ENOMEM;
|
|
}
|
|
|
|
dtc->chan = chan;
|
|
INIT_LIST_HEAD(&dtc->threads);
|
|
|
|
if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) {
|
|
cnt = dmatest_add_threads(info, dtc, DMA_MEMCPY);
|
|
thread_count += cnt > 0 ? cnt : 0;
|
|
}
|
|
if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) {
|
|
cnt = dmatest_add_threads(info, dtc, DMA_XOR);
|
|
thread_count += cnt > 0 ? cnt : 0;
|
|
}
|
|
if (dma_has_cap(DMA_PQ, dma_dev->cap_mask)) {
|
|
cnt = dmatest_add_threads(info, dtc, DMA_PQ);
|
|
thread_count += cnt > 0 ? cnt : 0;
|
|
}
|
|
|
|
pr_info("dmatest: Started %u threads using %s\n",
|
|
thread_count, dma_chan_name(chan));
|
|
|
|
list_add_tail(&dtc->node, &info->channels);
|
|
info->nr_channels++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool filter(struct dma_chan *chan, void *param)
|
|
{
|
|
struct dmatest_params *params = param;
|
|
|
|
if (!dmatest_match_channel(params, chan) ||
|
|
!dmatest_match_device(params, chan->device))
|
|
return false;
|
|
else
|
|
return true;
|
|
}
|
|
|
|
static int __run_threaded_test(struct dmatest_info *info)
|
|
{
|
|
dma_cap_mask_t mask;
|
|
struct dma_chan *chan;
|
|
struct dmatest_params *params = &info->params;
|
|
int err = 0;
|
|
|
|
dma_cap_zero(mask);
|
|
dma_cap_set(DMA_MEMCPY, mask);
|
|
for (;;) {
|
|
chan = dma_request_channel(mask, filter, params);
|
|
if (chan) {
|
|
err = dmatest_add_channel(info, chan);
|
|
if (err) {
|
|
dma_release_channel(chan);
|
|
break; /* add_channel failed, punt */
|
|
}
|
|
} else
|
|
break; /* no more channels available */
|
|
if (params->max_channels &&
|
|
info->nr_channels >= params->max_channels)
|
|
break; /* we have all we need */
|
|
}
|
|
return err;
|
|
}
|
|
|
|
#ifndef MODULE
|
|
static int run_threaded_test(struct dmatest_info *info)
|
|
{
|
|
int ret;
|
|
|
|
mutex_lock(&info->lock);
|
|
ret = __run_threaded_test(info);
|
|
mutex_unlock(&info->lock);
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
static void __stop_threaded_test(struct dmatest_info *info)
|
|
{
|
|
struct dmatest_chan *dtc, *_dtc;
|
|
struct dma_chan *chan;
|
|
|
|
list_for_each_entry_safe(dtc, _dtc, &info->channels, node) {
|
|
list_del(&dtc->node);
|
|
chan = dtc->chan;
|
|
dmatest_cleanup_channel(dtc);
|
|
pr_debug("dmatest: dropped channel %s\n", dma_chan_name(chan));
|
|
dma_release_channel(chan);
|
|
}
|
|
|
|
info->nr_channels = 0;
|
|
}
|
|
|
|
static void stop_threaded_test(struct dmatest_info *info)
|
|
{
|
|
mutex_lock(&info->lock);
|
|
__stop_threaded_test(info);
|
|
mutex_unlock(&info->lock);
|
|
}
|
|
|
|
static int __restart_threaded_test(struct dmatest_info *info, bool run)
|
|
{
|
|
struct dmatest_params *params = &info->params;
|
|
int ret;
|
|
|
|
/* Stop any running test first */
|
|
__stop_threaded_test(info);
|
|
|
|
if (run == false)
|
|
return 0;
|
|
|
|
/* Clear results from previous run */
|
|
result_free(info, NULL);
|
|
|
|
/* Copy test parameters */
|
|
memcpy(params, &info->dbgfs_params, sizeof(*params));
|
|
|
|
/* Run test with new parameters */
|
|
ret = __run_threaded_test(info);
|
|
if (ret) {
|
|
__stop_threaded_test(info);
|
|
pr_err("dmatest: Can't run test\n");
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t dtf_write_string(void *to, size_t available, loff_t *ppos,
|
|
const void __user *from, size_t count)
|
|
{
|
|
char tmp[20];
|
|
ssize_t len;
|
|
|
|
len = simple_write_to_buffer(tmp, sizeof(tmp) - 1, ppos, from, count);
|
|
if (len >= 0) {
|
|
tmp[len] = '\0';
|
|
strlcpy(to, strim(tmp), available);
|
|
}
|
|
|
|
return len;
|
|
}
|
|
|
|
static ssize_t dtf_read_channel(struct file *file, char __user *buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct dmatest_info *info = file->private_data;
|
|
return simple_read_from_buffer(buf, count, ppos,
|
|
info->dbgfs_params.channel,
|
|
strlen(info->dbgfs_params.channel));
|
|
}
|
|
|
|
static ssize_t dtf_write_channel(struct file *file, const char __user *buf,
|
|
size_t size, loff_t *ppos)
|
|
{
|
|
struct dmatest_info *info = file->private_data;
|
|
return dtf_write_string(info->dbgfs_params.channel,
|
|
sizeof(info->dbgfs_params.channel),
|
|
ppos, buf, size);
|
|
}
|
|
|
|
static const struct file_operations dtf_channel_fops = {
|
|
.read = dtf_read_channel,
|
|
.write = dtf_write_channel,
|
|
.open = simple_open,
|
|
.llseek = default_llseek,
|
|
};
|
|
|
|
static ssize_t dtf_read_device(struct file *file, char __user *buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct dmatest_info *info = file->private_data;
|
|
return simple_read_from_buffer(buf, count, ppos,
|
|
info->dbgfs_params.device,
|
|
strlen(info->dbgfs_params.device));
|
|
}
|
|
|
|
static ssize_t dtf_write_device(struct file *file, const char __user *buf,
|
|
size_t size, loff_t *ppos)
|
|
{
|
|
struct dmatest_info *info = file->private_data;
|
|
return dtf_write_string(info->dbgfs_params.device,
|
|
sizeof(info->dbgfs_params.device),
|
|
ppos, buf, size);
|
|
}
|
|
|
|
static const struct file_operations dtf_device_fops = {
|
|
.read = dtf_read_device,
|
|
.write = dtf_write_device,
|
|
.open = simple_open,
|
|
.llseek = default_llseek,
|
|
};
|
|
|
|
static ssize_t dtf_read_run(struct file *file, char __user *user_buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct dmatest_info *info = file->private_data;
|
|
char buf[3];
|
|
struct dmatest_chan *dtc;
|
|
bool alive = false;
|
|
|
|
mutex_lock(&info->lock);
|
|
list_for_each_entry(dtc, &info->channels, node) {
|
|
struct dmatest_thread *thread;
|
|
|
|
list_for_each_entry(thread, &dtc->threads, node) {
|
|
if (!thread->done) {
|
|
alive = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (alive) {
|
|
buf[0] = 'Y';
|
|
} else {
|
|
__stop_threaded_test(info);
|
|
buf[0] = 'N';
|
|
}
|
|
|
|
mutex_unlock(&info->lock);
|
|
buf[1] = '\n';
|
|
buf[2] = 0x00;
|
|
return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
|
|
}
|
|
|
|
static ssize_t dtf_write_run(struct file *file, const char __user *user_buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct dmatest_info *info = file->private_data;
|
|
char buf[16];
|
|
bool bv;
|
|
int ret = 0;
|
|
|
|
if (copy_from_user(buf, user_buf, min(count, (sizeof(buf) - 1))))
|
|
return -EFAULT;
|
|
|
|
if (strtobool(buf, &bv) == 0) {
|
|
mutex_lock(&info->lock);
|
|
ret = __restart_threaded_test(info, bv);
|
|
mutex_unlock(&info->lock);
|
|
}
|
|
|
|
return ret ? ret : count;
|
|
}
|
|
|
|
static const struct file_operations dtf_run_fops = {
|
|
.read = dtf_read_run,
|
|
.write = dtf_write_run,
|
|
.open = simple_open,
|
|
.llseek = default_llseek,
|
|
};
|
|
|
|
static int dtf_results_show(struct seq_file *sf, void *data)
|
|
{
|
|
struct dmatest_info *info = sf->private;
|
|
struct dmatest_result *result;
|
|
struct dmatest_thread_result *tr;
|
|
unsigned int i;
|
|
|
|
mutex_lock(&info->results_lock);
|
|
list_for_each_entry(result, &info->results, node) {
|
|
list_for_each_entry(tr, &result->results, node) {
|
|
seq_printf(sf, "%s\n",
|
|
thread_result_get(result->name, tr));
|
|
if (tr->type == DMATEST_ET_VERIFY_BUF) {
|
|
for (i = 0; i < tr->vr->error_count; i++) {
|
|
seq_printf(sf, "\t%s\n",
|
|
verify_result_get_one(tr->vr, i));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&info->results_lock);
|
|
return 0;
|
|
}
|
|
|
|
static int dtf_results_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, dtf_results_show, inode->i_private);
|
|
}
|
|
|
|
static const struct file_operations dtf_results_fops = {
|
|
.open = dtf_results_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static int dmatest_register_dbgfs(struct dmatest_info *info)
|
|
{
|
|
struct dentry *d;
|
|
struct dmatest_params *params = &info->dbgfs_params;
|
|
int ret = -ENOMEM;
|
|
|
|
d = debugfs_create_dir("dmatest", NULL);
|
|
if (IS_ERR(d))
|
|
return PTR_ERR(d);
|
|
if (!d)
|
|
goto err_root;
|
|
|
|
info->root = d;
|
|
|
|
/* Copy initial values */
|
|
memcpy(params, &info->params, sizeof(*params));
|
|
|
|
/* Test parameters */
|
|
|
|
d = debugfs_create_u32("test_buf_size", S_IWUSR | S_IRUGO, info->root,
|
|
(u32 *)¶ms->buf_size);
|
|
if (IS_ERR_OR_NULL(d))
|
|
goto err_node;
|
|
|
|
d = debugfs_create_file("channel", S_IRUGO | S_IWUSR, info->root,
|
|
info, &dtf_channel_fops);
|
|
if (IS_ERR_OR_NULL(d))
|
|
goto err_node;
|
|
|
|
d = debugfs_create_file("device", S_IRUGO | S_IWUSR, info->root,
|
|
info, &dtf_device_fops);
|
|
if (IS_ERR_OR_NULL(d))
|
|
goto err_node;
|
|
|
|
d = debugfs_create_u32("threads_per_chan", S_IWUSR | S_IRUGO, info->root,
|
|
(u32 *)¶ms->threads_per_chan);
|
|
if (IS_ERR_OR_NULL(d))
|
|
goto err_node;
|
|
|
|
d = debugfs_create_u32("max_channels", S_IWUSR | S_IRUGO, info->root,
|
|
(u32 *)¶ms->max_channels);
|
|
if (IS_ERR_OR_NULL(d))
|
|
goto err_node;
|
|
|
|
d = debugfs_create_u32("iterations", S_IWUSR | S_IRUGO, info->root,
|
|
(u32 *)¶ms->iterations);
|
|
if (IS_ERR_OR_NULL(d))
|
|
goto err_node;
|
|
|
|
d = debugfs_create_u32("xor_sources", S_IWUSR | S_IRUGO, info->root,
|
|
(u32 *)¶ms->xor_sources);
|
|
if (IS_ERR_OR_NULL(d))
|
|
goto err_node;
|
|
|
|
d = debugfs_create_u32("pq_sources", S_IWUSR | S_IRUGO, info->root,
|
|
(u32 *)¶ms->pq_sources);
|
|
if (IS_ERR_OR_NULL(d))
|
|
goto err_node;
|
|
|
|
d = debugfs_create_u32("timeout", S_IWUSR | S_IRUGO, info->root,
|
|
(u32 *)¶ms->timeout);
|
|
if (IS_ERR_OR_NULL(d))
|
|
goto err_node;
|
|
|
|
/* Run or stop threaded test */
|
|
d = debugfs_create_file("run", S_IWUSR | S_IRUGO, info->root,
|
|
info, &dtf_run_fops);
|
|
if (IS_ERR_OR_NULL(d))
|
|
goto err_node;
|
|
|
|
/* Results of test in progress */
|
|
d = debugfs_create_file("results", S_IRUGO, info->root, info,
|
|
&dtf_results_fops);
|
|
if (IS_ERR_OR_NULL(d))
|
|
goto err_node;
|
|
|
|
return 0;
|
|
|
|
err_node:
|
|
debugfs_remove_recursive(info->root);
|
|
err_root:
|
|
pr_err("dmatest: Failed to initialize debugfs\n");
|
|
return ret;
|
|
}
|
|
|
|
static int __init dmatest_init(void)
|
|
{
|
|
struct dmatest_info *info = &test_info;
|
|
struct dmatest_params *params = &info->params;
|
|
int ret;
|
|
|
|
memset(info, 0, sizeof(*info));
|
|
|
|
mutex_init(&info->lock);
|
|
INIT_LIST_HEAD(&info->channels);
|
|
|
|
mutex_init(&info->results_lock);
|
|
INIT_LIST_HEAD(&info->results);
|
|
|
|
/* Set default parameters */
|
|
params->buf_size = test_buf_size;
|
|
strlcpy(params->channel, test_channel, sizeof(params->channel));
|
|
strlcpy(params->device, test_device, sizeof(params->device));
|
|
params->threads_per_chan = threads_per_chan;
|
|
params->max_channels = max_channels;
|
|
params->iterations = iterations;
|
|
params->xor_sources = xor_sources;
|
|
params->pq_sources = pq_sources;
|
|
params->timeout = timeout;
|
|
|
|
ret = dmatest_register_dbgfs(info);
|
|
if (ret)
|
|
return ret;
|
|
|
|
#ifdef MODULE
|
|
return 0;
|
|
#else
|
|
return run_threaded_test(info);
|
|
#endif
|
|
}
|
|
/* when compiled-in wait for drivers to load first */
|
|
late_initcall(dmatest_init);
|
|
|
|
static void __exit dmatest_exit(void)
|
|
{
|
|
struct dmatest_info *info = &test_info;
|
|
|
|
debugfs_remove_recursive(info->root);
|
|
stop_threaded_test(info);
|
|
result_free(info, NULL);
|
|
}
|
|
module_exit(dmatest_exit);
|
|
|
|
MODULE_AUTHOR("Haavard Skinnemoen (Atmel)");
|
|
MODULE_LICENSE("GPL v2");
|