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drivers/dma/dmatest.c
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/* * DMA Engine test module * * Copyright (C) 2007 Atmel Corporation |
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* Copyright (C) 2013 Intel Corporation |
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* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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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> #include <linux/kthread.h> |
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#include <linux/sched/task.h> |
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#include <linux/module.h> #include <linux/moduleparam.h> #include <linux/random.h> |
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#include <linux/slab.h> |
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#include <linux/wait.h> static unsigned int test_buf_size = 16384; |
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module_param(test_buf_size, uint, S_IRUGO | S_IWUSR); |
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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 | S_IWUSR); |
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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[32]; |
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module_param_string(device, test_device, sizeof(test_device), S_IRUGO | S_IWUSR); |
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MODULE_PARM_DESC(device, "Bus ID of the DMA Engine to test (default: any)"); static unsigned int threads_per_chan = 1; |
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module_param(threads_per_chan, uint, S_IRUGO | S_IWUSR); |
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MODULE_PARM_DESC(threads_per_chan, "Number of threads to start per channel (default: 1)"); static unsigned int max_channels; |
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module_param(max_channels, uint, S_IRUGO | S_IWUSR); |
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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 | S_IWUSR); |
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MODULE_PARM_DESC(iterations, "Iterations before stopping test (default: infinite)"); |
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static unsigned int dmatest; |
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module_param(dmatest, uint, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(dmatest, |
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"dmatest 0-memcpy 1-memset (default: 0)"); |
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static unsigned int xor_sources = 3; |
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module_param(xor_sources, uint, S_IRUGO | S_IWUSR); |
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MODULE_PARM_DESC(xor_sources, "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 | S_IWUSR); |
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MODULE_PARM_DESC(pq_sources, "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 | S_IWUSR); |
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MODULE_PARM_DESC(timeout, "Transfer Timeout in msec (default: 3000), " "Pass -1 for infinite timeout"); |
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static bool noverify; module_param(noverify, bool, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(noverify, "Disable random data setup and verification"); |
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static bool verbose; module_param(verbose, bool, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(verbose, "Enable \"success\" result messages (default: off)"); |
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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 * @channel: bus ID of the channel to test * @device: bus ID of the DMA Engine to test * @threads_per_chan: number of threads to start per channel * @max_channels: maximum number of channels to use * @iterations: iterations before stopping test * @xor_sources: number of xor source buffers * @pq_sources: number of p+q source buffers * @timeout: transfer timeout in msec, -1 for infinite timeout */ |
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struct dmatest_params { |
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unsigned int buf_size; char channel[20]; |
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char device[32]; |
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unsigned int threads_per_chan; unsigned int max_channels; unsigned int iterations; unsigned int xor_sources; unsigned int pq_sources; int timeout; |
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bool noverify; |
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}; /** * struct dmatest_info - test information. * @params: test parameters |
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* @lock: access protection to the fields of this structure |
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*/ |
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static struct dmatest_info { |
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/* Test parameters */ struct dmatest_params params; |
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/* Internal state */ struct list_head channels; unsigned int nr_channels; |
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struct mutex lock; |
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bool did_init; } test_info = { .channels = LIST_HEAD_INIT(test_info.channels), .lock = __MUTEX_INITIALIZER(test_info.lock), }; |
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static int dmatest_run_set(const char *val, const struct kernel_param *kp); static int dmatest_run_get(char *val, const struct kernel_param *kp); |
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static const struct kernel_param_ops run_ops = { |
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.set = dmatest_run_set, .get = dmatest_run_get, |
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}; |
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static bool dmatest_run; module_param_cb(run, &run_ops, &dmatest_run, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(run, "Run the test (default: false)"); |
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/* Maximum amount of mismatched bytes in buffer to print */ #define MAX_ERROR_COUNT 32 /* * Initialization patterns. All bytes in the source buffer has bit 7 * set, all bytes in the destination buffer has bit 7 cleared. * * Bit 6 is set for all bytes which are to be copied by the DMA * engine. Bit 5 is set for all bytes which are to be overwritten by * the DMA engine. * * The remaining bits are the inverse of a counter which increments by * one for each byte address. */ #define PATTERN_SRC 0x80 #define PATTERN_DST 0x00 #define PATTERN_COPY 0x40 #define PATTERN_OVERWRITE 0x20 #define PATTERN_COUNT_MASK 0x1f |
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#define PATTERN_MEMSET_IDX 0x01 |
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/* poor man's completion - we want to use wait_event_freezable() on it */ struct dmatest_done { bool done; wait_queue_head_t *wait; }; |
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struct dmatest_thread { struct list_head node; struct dmatest_info *info; struct task_struct *task; struct dma_chan *chan; u8 **srcs; |
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u8 **usrcs; |
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u8 **dsts; |
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u8 **udsts; |
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enum dma_transaction_type type; |
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wait_queue_head_t done_wait; struct dmatest_done test_done; |
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bool done; }; |
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struct dmatest_chan { struct list_head node; struct dma_chan *chan; struct list_head threads; |
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}; |
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static DECLARE_WAIT_QUEUE_HEAD(thread_wait); static bool wait; static bool is_threaded_test_run(struct dmatest_info *info) { struct dmatest_chan *dtc; list_for_each_entry(dtc, &info->channels, node) { struct dmatest_thread *thread; list_for_each_entry(thread, &dtc->threads, node) { if (!thread->done) return true; } } return false; } static int dmatest_wait_get(char *val, const struct kernel_param *kp) { struct dmatest_info *info = &test_info; struct dmatest_params *params = &info->params; if (params->iterations) wait_event(thread_wait, !is_threaded_test_run(info)); wait = true; return param_get_bool(val, kp); } |
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static const struct kernel_param_ops wait_ops = { |
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.get = dmatest_wait_get, .set = param_set_bool, }; module_param_cb(wait, &wait_ops, &wait, S_IRUGO); MODULE_PARM_DESC(wait, "Wait for tests to complete (default: false)"); |
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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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} static unsigned long dmatest_random(void) { unsigned long buf; |
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prandom_bytes(&buf, sizeof(buf)); |
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return buf; } |
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static inline u8 gen_inv_idx(u8 index, bool is_memset) { u8 val = is_memset ? PATTERN_MEMSET_IDX : index; return ~val & PATTERN_COUNT_MASK; } static inline u8 gen_src_value(u8 index, bool is_memset) { return PATTERN_SRC | gen_inv_idx(index, is_memset); } static inline u8 gen_dst_value(u8 index, bool is_memset) { return PATTERN_DST | gen_inv_idx(index, is_memset); } |
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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, bool is_memset) |
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{ unsigned int i; |
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u8 *buf; for (; (buf = *bufs); bufs++) { for (i = 0; i < start; i++) |
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buf[i] = gen_src_value(i, is_memset); |
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for ( ; i < start + len; i++) |
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buf[i] = gen_src_value(i, is_memset) | PATTERN_COPY; |
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for ( ; i < buf_size; i++) |
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buf[i] = gen_src_value(i, is_memset); |
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buf++; } |
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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, bool is_memset) |
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{ unsigned int i; |
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u8 *buf; for (; (buf = *bufs); bufs++) { for (i = 0; i < start; i++) |
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buf[i] = gen_dst_value(i, is_memset); |
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for ( ; i < start + len; i++) |
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buf[i] = gen_dst_value(i, is_memset) | PATTERN_OVERWRITE; |
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for ( ; i < buf_size; i++) |
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buf[i] = gen_dst_value(i, is_memset); |
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} |
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} |
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static void dmatest_mismatch(u8 actual, u8 pattern, unsigned int index, |
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unsigned int counter, bool is_srcbuf, bool is_memset) |
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{ u8 diff = actual ^ pattern; |
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u8 expected = pattern | gen_inv_idx(counter, is_memset); |
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const char *thread_name = current->comm; if (is_srcbuf) pr_warn("%s: srcbuf[0x%x] overwritten! Expected %02x, got %02x ", thread_name, index, expected, actual); else if ((pattern & PATTERN_COPY) && (diff & (PATTERN_COPY | PATTERN_OVERWRITE))) pr_warn("%s: dstbuf[0x%x] not copied! Expected %02x, got %02x ", thread_name, index, expected, actual); else if (diff & PATTERN_SRC) pr_warn("%s: dstbuf[0x%x] was copied! Expected %02x, got %02x ", thread_name, index, expected, actual); else pr_warn("%s: dstbuf[0x%x] mismatch! Expected %02x, got %02x ", thread_name, index, expected, actual); } static unsigned int dmatest_verify(u8 **bufs, unsigned int start, unsigned int end, unsigned int counter, u8 pattern, |
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bool is_srcbuf, bool is_memset) |
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{ unsigned int i; unsigned int error_count = 0; u8 actual; |
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u8 expected; u8 *buf; unsigned int counter_orig = counter; for (; (buf = *bufs); bufs++) { counter = counter_orig; for (i = start; i < end; i++) { actual = buf[i]; |
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expected = pattern | gen_inv_idx(counter, is_memset); |
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if (actual != expected) { |
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if (error_count < MAX_ERROR_COUNT) dmatest_mismatch(actual, pattern, i, |
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counter, is_srcbuf, is_memset); |
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error_count++; } counter++; |
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} |
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} |
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if (error_count > MAX_ERROR_COUNT) |
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pr_warn("%s: %u errors suppressed ", |
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current->comm, error_count - MAX_ERROR_COUNT); |
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return error_count; } |
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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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struct dmatest_thread *thread = |
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container_of(done, struct dmatest_thread, test_done); |
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if (!thread->done) { done->done = true; wake_up_all(done->wait); } else { /* * If thread->done, it means that this callback occurred * after the parent thread has cleaned up. This can * happen in the case that driver doesn't implement * the terminate_all() functionality and a dma operation * did not occur within the timeout period */ WARN(1, "dmatest: Kernel memory may be corrupted!! "); } |
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} |
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static unsigned int min_odd(unsigned int x, unsigned int y) { unsigned int val = min(x, y); return val % 2 ? val : val - 1; } |
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static void result(const char *err, unsigned int n, unsigned int src_off, unsigned int dst_off, unsigned int len, unsigned long data) |
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{ |
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pr_info("%s: result #%u: '%s' with src_off=0x%x dst_off=0x%x len=0x%x (%lu) ", |
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current->comm, n, err, src_off, dst_off, len, data); |
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} |
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static void dbg_result(const char *err, unsigned int n, unsigned int src_off, unsigned int dst_off, unsigned int len, unsigned long data) |
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{ |
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pr_debug("%s: result #%u: '%s' with src_off=0x%x dst_off=0x%x len=0x%x (%lu) ", |
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current->comm, n, err, src_off, dst_off, len, data); |
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} |
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#define verbose_result(err, n, src_off, dst_off, len, data) ({ \ if (verbose) \ result(err, n, src_off, dst_off, len, data); \ else \ dbg_result(err, n, src_off, dst_off, len, data);\ |
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}) |
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static unsigned long long dmatest_persec(s64 runtime, unsigned int val) |
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{ |
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unsigned long long per_sec = 1000000; |
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if (runtime <= 0) return 0; |
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/* drop precision until runtime is 32-bits */ while (runtime > UINT_MAX) { runtime >>= 1; per_sec <<= 1; |
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} |
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per_sec *= val; do_div(per_sec, runtime); return per_sec; |
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} |
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static unsigned long long dmatest_KBs(s64 runtime, unsigned long long len) |
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{ |
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return dmatest_persec(runtime, len >> 10); |
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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 * kthread_stop(). There may be multiple threads running this function * in parallel for a single channel, and there may be multiple channels * being tested in parallel. |
4a776f0aa dmatest: Simple D... |
415 416 417 418 419 420 421 422 423 424 425 |
* * Before each test, the source and destination buffer is initialized * with a known pattern. This pattern is different depending on * whether it's in an area which is supposed to be copied or * overwritten, and different in the source and destination buffers. * So if the DMA engine doesn't copy exactly what we tell it to copy, * we'll notice. */ static int dmatest_func(void *data) { struct dmatest_thread *thread = data; |
0aa5d007b dmaengine: dmates... |
426 |
struct dmatest_done *done = &thread->test_done; |
e03e93a97 dmatest: create d... |
427 |
struct dmatest_info *info; |
15b8a8ea1 dmatest: split te... |
428 |
struct dmatest_params *params; |
4a776f0aa dmatest: Simple D... |
429 |
struct dma_chan *chan; |
8be9e32b3 dmatest: adjust i... |
430 |
struct dma_device *dev; |
4a776f0aa dmatest: Simple D... |
431 432 433 434 435 |
unsigned int error_count; unsigned int failed_tests = 0; unsigned int total_tests = 0; dma_cookie_t cookie; enum dma_status status; |
b54d5cb91 dmatest: add xor ... |
436 |
enum dma_ctrl_flags flags; |
945b5af3c dmatest: allocate... |
437 |
u8 *pq_coefs = NULL; |
4a776f0aa dmatest: Simple D... |
438 |
int ret; |
b54d5cb91 dmatest: add xor ... |
439 440 441 |
int src_cnt; int dst_cnt; int i; |
e9405ef08 dmaengine: dmates... |
442 |
ktime_t ktime, start, diff; |
8b0e19531 ktime: Cleanup kt... |
443 444 |
ktime_t filltime = 0; ktime_t comparetime = 0; |
86727443a dmatest: add basi... |
445 446 |
s64 runtime = 0; unsigned long long total_len = 0; |
d64816086 dmaengine: dmates... |
447 |
u8 align = 0; |
61b5f54d8 dmaengine: dmates... |
448 |
bool is_memset = false; |
4a776f0aa dmatest: Simple D... |
449 |
|
adfa543e7 dmatest: don't us... |
450 |
set_freezable(); |
4a776f0aa dmatest: Simple D... |
451 452 |
ret = -ENOMEM; |
4a776f0aa dmatest: Simple D... |
453 454 |
smp_rmb(); |
e03e93a97 dmatest: create d... |
455 |
info = thread->info; |
15b8a8ea1 dmatest: split te... |
456 |
params = &info->params; |
4a776f0aa dmatest: Simple D... |
457 |
chan = thread->chan; |
8be9e32b3 dmatest: adjust i... |
458 |
dev = chan->device; |
d64816086 dmaengine: dmates... |
459 460 |
if (thread->type == DMA_MEMCPY) { align = dev->copy_align; |
b54d5cb91 dmatest: add xor ... |
461 |
src_cnt = dst_cnt = 1; |
61b5f54d8 dmaengine: dmates... |
462 463 464 465 |
} else if (thread->type == DMA_MEMSET) { align = dev->fill_align; src_cnt = dst_cnt = 1; is_memset = true; |
d64816086 dmaengine: dmates... |
466 |
} else if (thread->type == DMA_XOR) { |
8be9e32b3 dmatest: adjust i... |
467 |
/* force odd to ensure dst = src */ |
15b8a8ea1 dmatest: split te... |
468 |
src_cnt = min_odd(params->xor_sources | 1, dev->max_xor); |
b54d5cb91 dmatest: add xor ... |
469 |
dst_cnt = 1; |
d64816086 dmaengine: dmates... |
470 |
align = dev->xor_align; |
58691d64c dmatest: add pq s... |
471 |
} else if (thread->type == DMA_PQ) { |
8be9e32b3 dmatest: adjust i... |
472 |
/* force odd to ensure dst = src */ |
15b8a8ea1 dmatest: split te... |
473 |
src_cnt = min_odd(params->pq_sources | 1, dma_maxpq(dev, 0)); |
58691d64c dmatest: add pq s... |
474 |
dst_cnt = 2; |
d64816086 dmaengine: dmates... |
475 |
align = dev->pq_align; |
945b5af3c dmatest: allocate... |
476 |
|
31d182574 dmaengine: fix sp... |
477 |
pq_coefs = kmalloc(params->pq_sources + 1, GFP_KERNEL); |
945b5af3c dmatest: allocate... |
478 479 |
if (!pq_coefs) goto err_thread_type; |
94de648d7 dmatest: correct ... |
480 |
for (i = 0; i < src_cnt; i++) |
58691d64c dmatest: add pq s... |
481 |
pq_coefs[i] = 1; |
b54d5cb91 dmatest: add xor ... |
482 |
} else |
945b5af3c dmatest: allocate... |
483 |
goto err_thread_type; |
b54d5cb91 dmatest: add xor ... |
484 |
|
31d182574 dmaengine: fix sp... |
485 |
thread->srcs = kcalloc(src_cnt + 1, sizeof(u8 *), GFP_KERNEL); |
b54d5cb91 dmatest: add xor ... |
486 487 |
if (!thread->srcs) goto err_srcs; |
d64816086 dmaengine: dmates... |
488 489 490 491 |
thread->usrcs = kcalloc(src_cnt + 1, sizeof(u8 *), GFP_KERNEL); if (!thread->usrcs) goto err_usrcs; |
b54d5cb91 dmatest: add xor ... |
492 |
for (i = 0; i < src_cnt; i++) { |
d64816086 dmaengine: dmates... |
493 494 495 |
thread->usrcs[i] = kmalloc(params->buf_size + align, GFP_KERNEL); if (!thread->usrcs[i]) |
b54d5cb91 dmatest: add xor ... |
496 |
goto err_srcbuf; |
d64816086 dmaengine: dmates... |
497 498 499 500 501 502 |
/* align srcs to alignment restriction */ if (align) thread->srcs[i] = PTR_ALIGN(thread->usrcs[i], align); else thread->srcs[i] = thread->usrcs[i]; |
b54d5cb91 dmatest: add xor ... |
503 504 |
} thread->srcs[i] = NULL; |
31d182574 dmaengine: fix sp... |
505 |
thread->dsts = kcalloc(dst_cnt + 1, sizeof(u8 *), GFP_KERNEL); |
b54d5cb91 dmatest: add xor ... |
506 507 |
if (!thread->dsts) goto err_dsts; |
d64816086 dmaengine: dmates... |
508 509 510 511 |
thread->udsts = kcalloc(dst_cnt + 1, sizeof(u8 *), GFP_KERNEL); if (!thread->udsts) goto err_udsts; |
b54d5cb91 dmatest: add xor ... |
512 |
for (i = 0; i < dst_cnt; i++) { |
d64816086 dmaengine: dmates... |
513 514 515 |
thread->udsts[i] = kmalloc(params->buf_size + align, GFP_KERNEL); if (!thread->udsts[i]) |
b54d5cb91 dmatest: add xor ... |
516 |
goto err_dstbuf; |
d64816086 dmaengine: dmates... |
517 518 519 520 521 522 |
/* align dsts to alignment restriction */ if (align) thread->dsts[i] = PTR_ALIGN(thread->udsts[i], align); else thread->dsts[i] = thread->udsts[i]; |
b54d5cb91 dmatest: add xor ... |
523 524 |
} thread->dsts[i] = NULL; |
e44e0aa3c dmatest: add dma ... |
525 |
set_user_nice(current, 10); |
b203bd3f6 dmatest: fix auto... |
526 |
/* |
d1cab34c0 dmatest: make dri... |
527 |
* src and dst buffers are freed by ourselves below |
b203bd3f6 dmatest: fix auto... |
528 |
*/ |
0776ae7b8 dmaengine: remove... |
529 |
flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT; |
4a776f0aa dmatest: Simple D... |
530 |
|
86727443a dmatest: add basi... |
531 |
ktime = ktime_get(); |
0a2ff57d6 dmaengine: dmates... |
532 |
while (!kthread_should_stop() |
15b8a8ea1 dmatest: split te... |
533 |
&& !(params->iterations && total_tests >= params->iterations)) { |
b54d5cb91 dmatest: add xor ... |
534 |
struct dma_async_tx_descriptor *tx = NULL; |
4076e755d dmatest: convert ... |
535 536 537 |
struct dmaengine_unmap_data *um; dma_addr_t srcs[src_cnt]; dma_addr_t *dsts; |
ede23a586 dmatest: move src... |
538 |
unsigned int src_off, dst_off, len; |
d86be86e9 dmatest: Use cust... |
539 |
|
4a776f0aa dmatest: Simple D... |
540 |
total_tests++; |
fbfb8e1dc dmaengine: dmates... |
541 542 543 544 545 546 547 |
/* Check if buffer count fits into map count variable (u8) */ if ((src_cnt + dst_cnt) >= 255) { pr_err("too many buffers (%d of 255 supported) ", src_cnt + dst_cnt); break; } |
15b8a8ea1 dmatest: split te... |
548 |
if (1 << align > params->buf_size) { |
cfe4f2751 dmaengine: fix dm... |
549 550 |
pr_err("%u-byte buffer too small for %d-byte alignment ", |
15b8a8ea1 dmatest: split te... |
551 |
params->buf_size, 1 << align); |
cfe4f2751 dmaengine: fix dm... |
552 553 |
break; } |
ede23a586 dmatest: move src... |
554 |
if (params->noverify) |
e3b9c3473 dmatest: add supp... |
555 |
len = params->buf_size; |
ede23a586 dmatest: move src... |
556 557 558 559 560 561 562 563 564 565 |
else len = dmatest_random() % params->buf_size + 1; len = (len >> align) << align; if (!len) len = 1 << align; total_len += len; if (params->noverify) { |
e3b9c3473 dmatest: add supp... |
566 567 568 |
src_off = 0; dst_off = 0; } else { |
e9405ef08 dmaengine: dmates... |
569 |
start = ktime_get(); |
e3b9c3473 dmatest: add supp... |
570 571 572 573 574 575 576 |
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, |
61b5f54d8 dmaengine: dmates... |
577 |
params->buf_size, is_memset); |
e3b9c3473 dmatest: add supp... |
578 |
dmatest_init_dsts(thread->dsts, dst_off, len, |
61b5f54d8 dmaengine: dmates... |
579 |
params->buf_size, is_memset); |
e9405ef08 dmaengine: dmates... |
580 581 582 |
diff = ktime_sub(ktime_get(), start); filltime = ktime_add(filltime, diff); |
e3b9c3473 dmatest: add supp... |
583 |
} |
31d182574 dmaengine: fix sp... |
584 |
um = dmaengine_get_unmap_data(dev->dev, src_cnt + dst_cnt, |
4076e755d dmatest: convert ... |
585 586 587 588 589 590 591 |
GFP_KERNEL); if (!um) { failed_tests++; result("unmap data NULL", total_tests, src_off, dst_off, len, ret); continue; } |
4a776f0aa dmatest: Simple D... |
592 |
|
4076e755d dmatest: convert ... |
593 |
um->len = params->buf_size; |
b54d5cb91 dmatest: add xor ... |
594 |
for (i = 0; i < src_cnt; i++) { |
745c00daf dmatest: fix buil... |
595 |
void *buf = thread->srcs[i]; |
4076e755d dmatest: convert ... |
596 |
struct page *pg = virt_to_page(buf); |
f62e5f613 dmaengine: dmates... |
597 |
unsigned long pg_off = offset_in_page(buf); |
4076e755d dmatest: convert ... |
598 599 600 601 602 |
um->addr[i] = dma_map_page(dev->dev, pg, pg_off, um->len, DMA_TO_DEVICE); srcs[i] = um->addr[i] + src_off; ret = dma_mapping_error(dev->dev, um->addr[i]); |
afde3be12 dmatest: check fo... |
603 |
if (ret) { |
4076e755d dmatest: convert ... |
604 |
dmaengine_unmap_put(um); |
872f05c6e dmatest: replace ... |
605 606 |
result("src mapping error", total_tests, src_off, dst_off, len, ret); |
afde3be12 dmatest: check fo... |
607 608 609 |
failed_tests++; continue; } |
4076e755d dmatest: convert ... |
610 |
um->to_cnt++; |
b54d5cb91 dmatest: add xor ... |
611 |
} |
d86be86e9 dmatest: Use cust... |
612 |
/* map with DMA_BIDIRECTIONAL to force writeback/invalidate */ |
4076e755d dmatest: convert ... |
613 |
dsts = &um->addr[src_cnt]; |
b54d5cb91 dmatest: add xor ... |
614 |
for (i = 0; i < dst_cnt; i++) { |
745c00daf dmatest: fix buil... |
615 |
void *buf = thread->dsts[i]; |
4076e755d dmatest: convert ... |
616 |
struct page *pg = virt_to_page(buf); |
f62e5f613 dmaengine: dmates... |
617 |
unsigned long pg_off = offset_in_page(buf); |
4076e755d dmatest: convert ... |
618 619 620 621 |
dsts[i] = dma_map_page(dev->dev, pg, pg_off, um->len, DMA_BIDIRECTIONAL); ret = dma_mapping_error(dev->dev, dsts[i]); |
afde3be12 dmatest: check fo... |
622 |
if (ret) { |
4076e755d dmatest: convert ... |
623 |
dmaengine_unmap_put(um); |
872f05c6e dmatest: replace ... |
624 625 |
result("dst mapping error", total_tests, src_off, dst_off, len, ret); |
afde3be12 dmatest: check fo... |
626 627 628 |
failed_tests++; continue; } |
4076e755d dmatest: convert ... |
629 |
um->bidi_cnt++; |
b54d5cb91 dmatest: add xor ... |
630 631 632 633 |
} if (thread->type == DMA_MEMCPY) tx = dev->device_prep_dma_memcpy(chan, |
4076e755d dmatest: convert ... |
634 635 |
dsts[0] + dst_off, srcs[0], len, flags); |
61b5f54d8 dmaengine: dmates... |
636 637 638 639 640 |
else if (thread->type == DMA_MEMSET) tx = dev->device_prep_dma_memset(chan, dsts[0] + dst_off, *(thread->srcs[0] + src_off), len, flags); |
b54d5cb91 dmatest: add xor ... |
641 642 |
else if (thread->type == DMA_XOR) tx = dev->device_prep_dma_xor(chan, |
4076e755d dmatest: convert ... |
643 644 |
dsts[0] + dst_off, srcs, src_cnt, |
b54d5cb91 dmatest: add xor ... |
645 |
len, flags); |
58691d64c dmatest: add pq s... |
646 647 648 649 |
else if (thread->type == DMA_PQ) { dma_addr_t dma_pq[dst_cnt]; for (i = 0; i < dst_cnt; i++) |
4076e755d dmatest: convert ... |
650 651 |
dma_pq[i] = dsts[i] + dst_off; tx = dev->device_prep_dma_pq(chan, dma_pq, srcs, |
94de648d7 dmatest: correct ... |
652 |
src_cnt, pq_coefs, |
58691d64c dmatest: add pq s... |
653 654 |
len, flags); } |
d86be86e9 dmatest: Use cust... |
655 |
|
d86be86e9 dmatest: Use cust... |
656 |
if (!tx) { |
4076e755d dmatest: convert ... |
657 |
dmaengine_unmap_put(um); |
872f05c6e dmatest: replace ... |
658 659 |
result("prep error", total_tests, src_off, dst_off, len, ret); |
d86be86e9 dmatest: Use cust... |
660 661 662 663 |
msleep(100); failed_tests++; continue; } |
e44e0aa3c dmatest: add dma ... |
664 |
|
0aa5d007b dmaengine: dmates... |
665 |
done->done = false; |
e44e0aa3c dmatest: add dma ... |
666 |
tx->callback = dmatest_callback; |
0aa5d007b dmaengine: dmates... |
667 |
tx->callback_param = done; |
d86be86e9 dmatest: Use cust... |
668 |
cookie = tx->tx_submit(tx); |
4a776f0aa dmatest: Simple D... |
669 |
if (dma_submit_error(cookie)) { |
4076e755d dmatest: convert ... |
670 |
dmaengine_unmap_put(um); |
872f05c6e dmatest: replace ... |
671 672 |
result("submit error", total_tests, src_off, dst_off, len, ret); |
4a776f0aa dmatest: Simple D... |
673 674 675 676 |
msleep(100); failed_tests++; continue; } |
b54d5cb91 dmatest: add xor ... |
677 |
dma_async_issue_pending(chan); |
4a776f0aa dmatest: Simple D... |
678 |
|
0aa5d007b dmaengine: dmates... |
679 |
wait_event_freezable_timeout(thread->done_wait, done->done, |
15b8a8ea1 dmatest: split te... |
680 |
msecs_to_jiffies(params->timeout)); |
981ed70d8 dmatest: make dma... |
681 |
|
e44e0aa3c dmatest: add dma ... |
682 |
status = dma_async_is_tx_complete(chan, cookie, NULL, NULL); |
4a776f0aa dmatest: Simple D... |
683 |
|
0aa5d007b dmaengine: dmates... |
684 |
if (!done->done) { |
4076e755d dmatest: convert ... |
685 |
dmaengine_unmap_put(um); |
872f05c6e dmatest: replace ... |
686 687 |
result("test timed out", total_tests, src_off, dst_off, len, 0); |
e44e0aa3c dmatest: add dma ... |
688 689 |
failed_tests++; continue; |
19e9f99f2 dmaengine: dmates... |
690 |
} else if (status != DMA_COMPLETE) { |
4076e755d dmatest: convert ... |
691 |
dmaengine_unmap_put(um); |
872f05c6e dmatest: replace ... |
692 693 694 695 |
result(status == DMA_ERROR ? "completion error status" : "completion busy status", total_tests, src_off, dst_off, len, ret); |
4a776f0aa dmatest: Simple D... |
696 697 698 |
failed_tests++; continue; } |
e44e0aa3c dmatest: add dma ... |
699 |
|
4076e755d dmatest: convert ... |
700 |
dmaengine_unmap_put(um); |
4a776f0aa dmatest: Simple D... |
701 |
|
e3b9c3473 dmatest: add supp... |
702 |
if (params->noverify) { |
50137a7df dmatest: verbose ... |
703 704 |
verbose_result("test passed", total_tests, src_off, dst_off, len, 0); |
e3b9c3473 dmatest: add supp... |
705 706 |
continue; } |
4a776f0aa dmatest: Simple D... |
707 |
|
e9405ef08 dmaengine: dmates... |
708 |
start = ktime_get(); |
872f05c6e dmatest: replace ... |
709 710 |
pr_debug("%s: verifying source buffer... ", current->comm); |
e3b9c3473 dmatest: add supp... |
711 |
error_count = dmatest_verify(thread->srcs, 0, src_off, |
61b5f54d8 dmaengine: dmates... |
712 |
0, PATTERN_SRC, true, is_memset); |
7b6101782 Revert "dmatest: ... |
713 714 |
error_count += dmatest_verify(thread->srcs, src_off, src_off + len, src_off, |
61b5f54d8 dmaengine: dmates... |
715 |
PATTERN_SRC | PATTERN_COPY, true, is_memset); |
7b6101782 Revert "dmatest: ... |
716 717 |
error_count += dmatest_verify(thread->srcs, src_off + len, params->buf_size, src_off + len, |
61b5f54d8 dmaengine: dmates... |
718 |
PATTERN_SRC, true, is_memset); |
7b6101782 Revert "dmatest: ... |
719 |
|
872f05c6e dmatest: replace ... |
720 721 |
pr_debug("%s: verifying dest buffer... ", current->comm); |
7b6101782 Revert "dmatest: ... |
722 |
error_count += dmatest_verify(thread->dsts, 0, dst_off, |
61b5f54d8 dmaengine: dmates... |
723 |
0, PATTERN_DST, false, is_memset); |
7b6101782 Revert "dmatest: ... |
724 725 |
error_count += dmatest_verify(thread->dsts, dst_off, dst_off + len, src_off, |
61b5f54d8 dmaengine: dmates... |
726 |
PATTERN_SRC | PATTERN_COPY, false, is_memset); |
7b6101782 Revert "dmatest: ... |
727 728 |
error_count += dmatest_verify(thread->dsts, dst_off + len, params->buf_size, dst_off + len, |
61b5f54d8 dmaengine: dmates... |
729 |
PATTERN_DST, false, is_memset); |
4a776f0aa dmatest: Simple D... |
730 |
|
e9405ef08 dmaengine: dmates... |
731 732 |
diff = ktime_sub(ktime_get(), start); comparetime = ktime_add(comparetime, diff); |
4a776f0aa dmatest: Simple D... |
733 |
if (error_count) { |
872f05c6e dmatest: replace ... |
734 735 |
result("data error", total_tests, src_off, dst_off, len, error_count); |
4a776f0aa dmatest: Simple D... |
736 737 |
failed_tests++; } else { |
50137a7df dmatest: verbose ... |
738 739 |
verbose_result("test passed", total_tests, src_off, dst_off, len, 0); |
4a776f0aa dmatest: Simple D... |
740 741 |
} } |
e9405ef08 dmaengine: dmates... |
742 743 744 745 |
ktime = ktime_sub(ktime_get(), ktime); ktime = ktime_sub(ktime, comparetime); ktime = ktime_sub(ktime, filltime); runtime = ktime_to_us(ktime); |
4a776f0aa dmatest: Simple D... |
746 747 |
ret = 0; |
8e1f50d74 dmatest: prevent ... |
748 |
err_dstbuf: |
d64816086 dmaengine: dmates... |
749 750 751 752 |
for (i = 0; thread->udsts[i]; i++) kfree(thread->udsts[i]); kfree(thread->udsts); err_udsts: |
b54d5cb91 dmatest: add xor ... |
753 754 |
kfree(thread->dsts); err_dsts: |
8e1f50d74 dmatest: prevent ... |
755 |
err_srcbuf: |
d64816086 dmaengine: dmates... |
756 757 758 759 |
for (i = 0; thread->usrcs[i]; i++) kfree(thread->usrcs[i]); kfree(thread->usrcs); err_usrcs: |
b54d5cb91 dmatest: add xor ... |
760 761 |
kfree(thread->srcs); err_srcs: |
945b5af3c dmatest: allocate... |
762 763 |
kfree(pq_coefs); err_thread_type: |
86727443a dmatest: add basi... |
764 765 766 767 768 |
pr_info("%s: summary %u tests, %u failures %llu iops %llu KB/s (%d) ", current->comm, total_tests, failed_tests, dmatest_persec(runtime, total_tests), dmatest_KBs(runtime, total_len), ret); |
0a2ff57d6 dmaengine: dmates... |
769 |
|
9704efaa5 dmaengine/dmatest... |
770 |
/* terminate all transfers on specified channels */ |
0aa5d007b dmaengine: dmates... |
771 |
if (ret || failed_tests) |
5e034f7b6 dmaengine/dmatest... |
772 |
dmaengine_terminate_all(chan); |
3e5ccd866 dmatest: return a... |
773 |
thread->done = true; |
2d88ce76e dmatest: add a 'w... |
774 |
wake_up(&thread_wait); |
0a2ff57d6 dmaengine: dmates... |
775 |
|
4a776f0aa dmatest: Simple D... |
776 777 778 779 780 781 782 783 784 785 786 |
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); |
0adff8006 dmatest: cleanup ... |
787 788 789 |
pr_debug("thread %s exited with status %d ", thread->task->comm, ret); |
4a776f0aa dmatest: Simple D... |
790 |
list_del(&thread->node); |
2d88ce76e dmatest: add a 'w... |
791 |
put_task_struct(thread->task); |
4a776f0aa dmatest: Simple D... |
792 793 |
kfree(thread); } |
9704efaa5 dmaengine/dmatest... |
794 795 |
/* terminate all transfers on specified channels */ |
944ea4dd3 dmatest: Fix NULL... |
796 |
dmaengine_terminate_all(dtc->chan); |
9704efaa5 dmaengine/dmatest... |
797 |
|
4a776f0aa dmatest: Simple D... |
798 799 |
kfree(dtc); } |
e03e93a97 dmatest: create d... |
800 801 |
static int dmatest_add_threads(struct dmatest_info *info, struct dmatest_chan *dtc, enum dma_transaction_type type) |
4a776f0aa dmatest: Simple D... |
802 |
{ |
15b8a8ea1 dmatest: split te... |
803 |
struct dmatest_params *params = &info->params; |
b54d5cb91 dmatest: add xor ... |
804 805 806 807 |
struct dmatest_thread *thread; struct dma_chan *chan = dtc->chan; char *op; unsigned int i; |
4a776f0aa dmatest: Simple D... |
808 |
|
b54d5cb91 dmatest: add xor ... |
809 810 |
if (type == DMA_MEMCPY) op = "copy"; |
61b5f54d8 dmaengine: dmates... |
811 812 |
else if (type == DMA_MEMSET) op = "set"; |
b54d5cb91 dmatest: add xor ... |
813 814 |
else if (type == DMA_XOR) op = "xor"; |
58691d64c dmatest: add pq s... |
815 816 |
else if (type == DMA_PQ) op = "pq"; |
b54d5cb91 dmatest: add xor ... |
817 818 |
else return -EINVAL; |
4a776f0aa dmatest: Simple D... |
819 |
|
15b8a8ea1 dmatest: split te... |
820 |
for (i = 0; i < params->threads_per_chan; i++) { |
4a776f0aa dmatest: Simple D... |
821 822 |
thread = kzalloc(sizeof(struct dmatest_thread), GFP_KERNEL); if (!thread) { |
0adff8006 dmatest: cleanup ... |
823 824 825 |
pr_warn("No memory for %s-%s%u ", dma_chan_name(chan), op, i); |
4a776f0aa dmatest: Simple D... |
826 827 |
break; } |
e03e93a97 dmatest: create d... |
828 |
thread->info = info; |
4a776f0aa dmatest: Simple D... |
829 |
thread->chan = dtc->chan; |
b54d5cb91 dmatest: add xor ... |
830 |
thread->type = type; |
0aa5d007b dmaengine: dmates... |
831 832 |
thread->test_done.wait = &thread->done_wait; init_waitqueue_head(&thread->done_wait); |
4a776f0aa dmatest: Simple D... |
833 |
smp_wmb(); |
2d88ce76e dmatest: add a 'w... |
834 |
thread->task = kthread_create(dmatest_func, thread, "%s-%s%u", |
b54d5cb91 dmatest: add xor ... |
835 |
dma_chan_name(chan), op, i); |
4a776f0aa dmatest: Simple D... |
836 |
if (IS_ERR(thread->task)) { |
2d88ce76e dmatest: add a 'w... |
837 838 |
pr_warn("Failed to create thread %s-%s%u ", |
0adff8006 dmatest: cleanup ... |
839 |
dma_chan_name(chan), op, i); |
4a776f0aa dmatest: Simple D... |
840 841 842 843 844 |
kfree(thread); break; } /* srcbuf and dstbuf are allocated by the thread itself */ |
2d88ce76e dmatest: add a 'w... |
845 |
get_task_struct(thread->task); |
4a776f0aa dmatest: Simple D... |
846 |
list_add_tail(&thread->node, &dtc->threads); |
2d88ce76e dmatest: add a 'w... |
847 |
wake_up_process(thread->task); |
4a776f0aa dmatest: Simple D... |
848 |
} |
b54d5cb91 dmatest: add xor ... |
849 850 |
return i; } |
e03e93a97 dmatest: create d... |
851 852 |
static int dmatest_add_channel(struct dmatest_info *info, struct dma_chan *chan) |
b54d5cb91 dmatest: add xor ... |
853 854 855 856 |
{ struct dmatest_chan *dtc; struct dma_device *dma_dev = chan->device; unsigned int thread_count = 0; |
b9033e682 dma: dmatest: fix... |
857 |
int cnt; |
b54d5cb91 dmatest: add xor ... |
858 859 860 |
dtc = kmalloc(sizeof(struct dmatest_chan), GFP_KERNEL); if (!dtc) { |
0adff8006 dmatest: cleanup ... |
861 862 |
pr_warn("No memory for %s ", dma_chan_name(chan)); |
b54d5cb91 dmatest: add xor ... |
863 864 865 866 867 868 869 |
return -ENOMEM; } dtc->chan = chan; INIT_LIST_HEAD(&dtc->threads); if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) { |
a0d4cb44d dmaengine: dmates... |
870 871 872 873 |
if (dmatest == 0) { cnt = dmatest_add_threads(info, dtc, DMA_MEMCPY); thread_count += cnt > 0 ? cnt : 0; } |
b54d5cb91 dmatest: add xor ... |
874 |
} |
a0d4cb44d dmaengine: dmates... |
875 |
|
61b5f54d8 dmaengine: dmates... |
876 |
if (dma_has_cap(DMA_MEMSET, dma_dev->cap_mask)) { |
a0d4cb44d dmaengine: dmates... |
877 |
if (dmatest == 1) { |
c678fa663 dmaengine: remove... |
878 |
cnt = dmatest_add_threads(info, dtc, DMA_MEMSET); |
a0d4cb44d dmaengine: dmates... |
879 880 881 |
thread_count += cnt > 0 ? cnt : 0; } } |
b54d5cb91 dmatest: add xor ... |
882 |
if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) { |
e03e93a97 dmatest: create d... |
883 |
cnt = dmatest_add_threads(info, dtc, DMA_XOR); |
f1aef8b6e dmaengine: dmates... |
884 |
thread_count += cnt > 0 ? cnt : 0; |
b54d5cb91 dmatest: add xor ... |
885 |
} |
58691d64c dmatest: add pq s... |
886 |
if (dma_has_cap(DMA_PQ, dma_dev->cap_mask)) { |
e03e93a97 dmatest: create d... |
887 |
cnt = dmatest_add_threads(info, dtc, DMA_PQ); |
d07a74a54 dmaengine: fix mi... |
888 |
thread_count += cnt > 0 ? cnt : 0; |
58691d64c dmatest: add pq s... |
889 |
} |
b54d5cb91 dmatest: add xor ... |
890 |
|
0adff8006 dmatest: cleanup ... |
891 892 |
pr_info("Started %u threads using %s ", |
b54d5cb91 dmatest: add xor ... |
893 |
thread_count, dma_chan_name(chan)); |
4a776f0aa dmatest: Simple D... |
894 |
|
838cc704c dmatest: move dma... |
895 896 |
list_add_tail(&dtc->node, &info->channels); info->nr_channels++; |
4a776f0aa dmatest: Simple D... |
897 |
|
33df8ca06 dmatest: convert ... |
898 |
return 0; |
4a776f0aa dmatest: Simple D... |
899 |
} |
7dd602510 dmaengine: kill e... |
900 |
static bool filter(struct dma_chan *chan, void *param) |
4a776f0aa dmatest: Simple D... |
901 |
{ |
15b8a8ea1 dmatest: split te... |
902 |
struct dmatest_params *params = param; |
e03e93a97 dmatest: create d... |
903 |
|
15b8a8ea1 dmatest: split te... |
904 905 |
if (!dmatest_match_channel(params, chan) || !dmatest_match_device(params, chan->device)) |
7dd602510 dmaengine: kill e... |
906 |
return false; |
33df8ca06 dmatest: convert ... |
907 |
else |
7dd602510 dmaengine: kill e... |
908 |
return true; |
4a776f0aa dmatest: Simple D... |
909 |
} |
a9e554957 dmatest: support ... |
910 911 |
static void request_channels(struct dmatest_info *info, enum dma_transaction_type type) |
4a776f0aa dmatest: Simple D... |
912 |
{ |
33df8ca06 dmatest: convert ... |
913 |
dma_cap_mask_t mask; |
33df8ca06 dmatest: convert ... |
914 915 |
dma_cap_zero(mask); |
a9e554957 dmatest: support ... |
916 |
dma_cap_set(type, mask); |
33df8ca06 dmatest: convert ... |
917 |
for (;;) { |
a9e554957 dmatest: support ... |
918 919 |
struct dmatest_params *params = &info->params; struct dma_chan *chan; |
15b8a8ea1 dmatest: split te... |
920 |
chan = dma_request_channel(mask, filter, params); |
33df8ca06 dmatest: convert ... |
921 |
if (chan) { |
a9e554957 dmatest: support ... |
922 |
if (dmatest_add_channel(info, chan)) { |
33df8ca06 dmatest: convert ... |
923 924 925 926 927 |
dma_release_channel(chan); break; /* add_channel failed, punt */ } } else break; /* no more channels available */ |
15b8a8ea1 dmatest: split te... |
928 929 |
if (params->max_channels && info->nr_channels >= params->max_channels) |
33df8ca06 dmatest: convert ... |
930 931 |
break; /* we have all we need */ } |
4a776f0aa dmatest: Simple D... |
932 |
} |
4a776f0aa dmatest: Simple D... |
933 |
|
a9e554957 dmatest: support ... |
934 |
static void run_threaded_test(struct dmatest_info *info) |
851b7e16a dmatest: run test... |
935 |
{ |
a9e554957 dmatest: support ... |
936 |
struct dmatest_params *params = &info->params; |
851b7e16a dmatest: run test... |
937 |
|
a9e554957 dmatest: support ... |
938 939 940 941 942 943 944 945 946 947 |
/* Copy test parameters */ params->buf_size = test_buf_size; strlcpy(params->channel, strim(test_channel), sizeof(params->channel)); strlcpy(params->device, strim(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; |
e3b9c3473 dmatest: add supp... |
948 |
params->noverify = noverify; |
a9e554957 dmatest: support ... |
949 950 |
request_channels(info, DMA_MEMCPY); |
61b5f54d8 dmaengine: dmates... |
951 |
request_channels(info, DMA_MEMSET); |
a9e554957 dmatest: support ... |
952 953 |
request_channels(info, DMA_XOR); request_channels(info, DMA_PQ); |
851b7e16a dmatest: run test... |
954 |
} |
851b7e16a dmatest: run test... |
955 |
|
a310d037b dmatest: restore ... |
956 |
static void stop_threaded_test(struct dmatest_info *info) |
4a776f0aa dmatest: Simple D... |
957 |
{ |
33df8ca06 dmatest: convert ... |
958 |
struct dmatest_chan *dtc, *_dtc; |
7cbd4877e dmatest: fix use ... |
959 |
struct dma_chan *chan; |
33df8ca06 dmatest: convert ... |
960 |
|
838cc704c dmatest: move dma... |
961 |
list_for_each_entry_safe(dtc, _dtc, &info->channels, node) { |
33df8ca06 dmatest: convert ... |
962 |
list_del(&dtc->node); |
7cbd4877e dmatest: fix use ... |
963 |
chan = dtc->chan; |
33df8ca06 dmatest: convert ... |
964 |
dmatest_cleanup_channel(dtc); |
0adff8006 dmatest: cleanup ... |
965 966 |
pr_debug("dropped channel %s ", dma_chan_name(chan)); |
7cbd4877e dmatest: fix use ... |
967 |
dma_release_channel(chan); |
33df8ca06 dmatest: convert ... |
968 |
} |
838cc704c dmatest: move dma... |
969 970 |
info->nr_channels = 0; |
4a776f0aa dmatest: Simple D... |
971 |
} |
e03e93a97 dmatest: create d... |
972 |
|
a9e554957 dmatest: support ... |
973 |
static void restart_threaded_test(struct dmatest_info *info, bool run) |
851b7e16a dmatest: run test... |
974 |
{ |
a310d037b dmatest: restore ... |
975 976 977 978 |
/* we might be called early to set run=, defer running until all * parameters have been evaluated */ if (!info->did_init) |
a9e554957 dmatest: support ... |
979 |
return; |
851b7e16a dmatest: run test... |
980 981 |
/* Stop any running test first */ |
a310d037b dmatest: restore ... |
982 |
stop_threaded_test(info); |
851b7e16a dmatest: run test... |
983 984 |
/* Run test with new parameters */ |
a9e554957 dmatest: support ... |
985 |
run_threaded_test(info); |
851b7e16a dmatest: run test... |
986 |
} |
a310d037b dmatest: restore ... |
987 |
static int dmatest_run_get(char *val, const struct kernel_param *kp) |
851b7e16a dmatest: run test... |
988 |
{ |
a310d037b dmatest: restore ... |
989 |
struct dmatest_info *info = &test_info; |
851b7e16a dmatest: run test... |
990 991 |
mutex_lock(&info->lock); |
a310d037b dmatest: restore ... |
992 993 |
if (is_threaded_test_run(info)) { dmatest_run = true; |
3e5ccd866 dmatest: return a... |
994 |
} else { |
a310d037b dmatest: restore ... |
995 996 |
stop_threaded_test(info); dmatest_run = false; |
3e5ccd866 dmatest: return a... |
997 |
} |
851b7e16a dmatest: run test... |
998 |
mutex_unlock(&info->lock); |
851b7e16a dmatest: run test... |
999 |
|
a310d037b dmatest: restore ... |
1000 |
return param_get_bool(val, kp); |
851b7e16a dmatest: run test... |
1001 |
} |
a310d037b dmatest: restore ... |
1002 |
static int dmatest_run_set(const char *val, const struct kernel_param *kp) |
95019c8c5 dmatest: gather t... |
1003 |
{ |
a310d037b dmatest: restore ... |
1004 1005 |
struct dmatest_info *info = &test_info; int ret; |
95019c8c5 dmatest: gather t... |
1006 |
|
a310d037b dmatest: restore ... |
1007 1008 1009 |
mutex_lock(&info->lock); ret = param_set_bool(val, kp); if (ret) { |
851b7e16a dmatest: run test... |
1010 |
mutex_unlock(&info->lock); |
a310d037b dmatest: restore ... |
1011 |
return ret; |
95019c8c5 dmatest: gather t... |
1012 |
} |
a310d037b dmatest: restore ... |
1013 1014 1015 |
if (is_threaded_test_run(info)) ret = -EBUSY; else if (dmatest_run) |
a9e554957 dmatest: support ... |
1016 |
restart_threaded_test(info, dmatest_run); |
851b7e16a dmatest: run test... |
1017 |
|
a310d037b dmatest: restore ... |
1018 |
mutex_unlock(&info->lock); |
851b7e16a dmatest: run test... |
1019 |
|
a310d037b dmatest: restore ... |
1020 |
return ret; |
851b7e16a dmatest: run test... |
1021 |
} |
e03e93a97 dmatest: create d... |
1022 1023 1024 |
static int __init dmatest_init(void) { struct dmatest_info *info = &test_info; |
2d88ce76e dmatest: add a 'w... |
1025 |
struct dmatest_params *params = &info->params; |
e03e93a97 dmatest: create d... |
1026 |
|
a310d037b dmatest: restore ... |
1027 1028 |
if (dmatest_run) { mutex_lock(&info->lock); |
a9e554957 dmatest: support ... |
1029 |
run_threaded_test(info); |
a310d037b dmatest: restore ... |
1030 1031 |
mutex_unlock(&info->lock); } |
838cc704c dmatest: move dma... |
1032 |
|
2d88ce76e dmatest: add a 'w... |
1033 1034 |
if (params->iterations && wait) wait_event(thread_wait, !is_threaded_test_run(info)); |
95019c8c5 dmatest: gather t... |
1035 |
|
a310d037b dmatest: restore ... |
1036 1037 1038 1039 |
/* module parameters are stable, inittime tests are started, * let userspace take over 'run' control */ info->did_init = true; |
851b7e16a dmatest: run test... |
1040 |
|
851b7e16a dmatest: run test... |
1041 |
return 0; |
e03e93a97 dmatest: create d... |
1042 1043 1044 1045 1046 1047 1048 |
} /* 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; |
a310d037b dmatest: restore ... |
1049 |
mutex_lock(&info->lock); |
e03e93a97 dmatest: create d... |
1050 |
stop_threaded_test(info); |
a310d037b dmatest: restore ... |
1051 |
mutex_unlock(&info->lock); |
e03e93a97 dmatest: create d... |
1052 |
} |
4a776f0aa dmatest: Simple D... |
1053 |
module_exit(dmatest_exit); |
e05503ef1 Haavard Skinnemoe... |
1054 |
MODULE_AUTHOR("Haavard Skinnemoen (Atmel)"); |
4a776f0aa dmatest: Simple D... |
1055 |
MODULE_LICENSE("GPL v2"); |