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dmatest: add support for skipping verification and random data setup 

Towards enabling dmatest to checkout performance add a 'noverify' mode.

Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
hifive-unleashed-5.1
Dan Williams 2013-11-06 16:30:05 -08:00
parent be9fa5a436
commit e3b9c34731
1 changed files with 33 additions and 11 deletions
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44
drivers/dma/dmatest.c
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@ -66,6 +66,10 @@ module_param(timeout, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(timeout, "Transfer Timeout in msec (default: 3000), "
"Pass -1 for infinite timeout");
static bool noverify;
module_param(noverify, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(noverify, "Disable random data setup and verification");
/**
* struct dmatest_params - test parameters.
* @buf_size: size of the memcpy test buffer
@ -88,6 +92,7 @@ struct dmatest_params {
unsigned int xor_sources;
unsigned int pq_sources;
int timeout;
bool noverify;
};
/**
@ -435,18 +440,30 @@ static int dmatest_func(void *data)
break;
}
len = dmatest_random() % params->buf_size + 1;
if (params->noverify) {
len = params->buf_size;
src_off = 0;
dst_off = 0;
} else {
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);
}
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;
@ -555,10 +572,14 @@ static int dmatest_func(void *data)
unmap_src(dev->dev, dma_srcs, len, src_cnt);
unmap_dst(dev->dev, dma_dsts, params->buf_size, dst_cnt);
error_count = 0;
if (params->noverify) {
dbg_result("test passed", total_tests, src_off, dst_off,
len, 0);
continue;
}
pr_debug("%s: verifying source buffer...\n", current->comm);
error_count += dmatest_verify(thread->srcs, 0, src_off,
error_count = dmatest_verify(thread->srcs, 0, src_off,
0, PATTERN_SRC, true);
error_count += dmatest_verify(thread->srcs, src_off,
src_off + len, src_off,
@ -773,6 +794,7 @@ static void run_threaded_test(struct dmatest_info *info)
params->xor_sources = xor_sources;
params->pq_sources = pq_sources;
params->timeout = timeout;
params->noverify = noverify;
request_channels(info, DMA_MEMCPY);
request_channels(info, DMA_XOR);