From a875abfadf265cb1970036898068b34fc63759b7 Mon Sep 17 00:00:00 2001 From: Seraj Alijan Date: Mon, 10 Dec 2018 08:52:37 +0000 Subject: dmaengine: dmatest: Add alignment parameter 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 Signed-off-by: Vinod Koul --- drivers/dma/dmatest.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) (limited to 'drivers/dma/dmatest.c') diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c index 998344b0fb7a..6302ebef2938 100644 --- a/drivers/dma/dmatest.c +++ b/drivers/dma/dmatest.c @@ -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); -- cgit v1.2.3