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authorSeraj Alijan <seraj.alijan@sondrel.com>2018-12-10 08:52:37 +0000
committerVinod Koul <vkoul@kernel.org>2018-12-17 11:45:11 +0530
commita875abfadf265cb1970036898068b34fc63759b7 (patch)
tree4a86684f970fa6a467705623d9044fb4217ec90a
parent6138f967bccc7a84a167769c2e045c346ad37191 (diff)
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 <seraj.alijan@sondrel.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
-rw-r--r--drivers/dma/dmatest.c18
1 files changed, 14 insertions, 4 deletions
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);