@@ -79,6 +79,10 @@ static bool verbose;
module_param(verbose, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(verbose, "Enable \"success\" result messages (default: off)");
+static int alignment = -1;
+module_param(alignment, int, 0644);
+MODULE_PARM_DESC(alignment, "Custom data address alignment taken as 2^(alignment) (default: not used (-1))");
+
/**
* struct dmatest_params - test parameters.
* @buf_size: size of the memcpy test buffer
@@ -103,6 +107,7 @@ struct dmatest_params {
int timeout;
bool noverify;
bool norandom;
+ int alignment;
};
/**
@@ -526,22 +531,26 @@ static int dmatest_func(void *data)
chan = thread->chan;
dev = chan->device;
if (thread->type == DMA_MEMCPY) {
- align = dev->copy_align;
+ align = params->alignment < 0 ? dev->copy_align :
+ params->alignment;
src_cnt = dst_cnt = 1;
} else if (thread->type == DMA_MEMSET) {
- align = dev->fill_align;
+ align = params->alignment < 0 ? dev->fill_align :
+ params->alignment;
src_cnt = dst_cnt = 1;
is_memset = true;
} 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;
- align = dev->xor_align;
+ align = params->alignment < 0 ? dev->xor_align :
+ params->alignment;
} 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;
- align = dev->pq_align;
+ align = params->alignment < 0 ? dev->pq_align :
+ params->alignment;
pq_coefs = kmalloc(params->pq_sources + 1, GFP_KERNEL);
if (!pq_coefs)
@@ -1037,6 +1046,7 @@ static void add_threaded_test(struct dmatest_info *info)
params->timeout = timeout;
params->noverify = noverify;
params->norandom = norandom;
+ params->alignment = alignment;
request_channels(info, DMA_MEMCPY);
request_channels(info, DMA_MEMSET);
Add parameter "alignment" to allow setting the address alignment manually. Having the ability to configure address alignment from user space adds new testing capabilities where different alignments can be configured for testing without having to modify the dma device alignment properties. If configured, the alignment value will override the device alignment property of the target device. Signed-off-by: Seraj Alijan <seraj.alijan@sondrel.com> --- drivers/dma/dmatest.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-)