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>
diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 01ac711..d07b732 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -66,6 +66,10 @@
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 @@
unsigned int xor_sources;
unsigned int pq_sources;
int timeout;
+ bool noverify;
};
/**
@@ -435,18 +440,30 @@
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 @@
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 @@
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);