summaryrefslogtreecommitdiffstats
path: root/drivers/dma
diff options
context:
space:
mode:
authorDan Williams <dan.j.williams@intel.com>2009-08-29 19:09:27 -0700
committerDan Williams <dan.j.williams@intel.com>2009-08-29 19:09:27 -0700
commit58691d64c44ae41ddf098ecb31e9a994026e3cff (patch)
tree93c36b2d244648a9b5880dc97de3cb945fdebda7 /drivers/dma
parent0a82a6239beecc95db6e05fe43ee62d16b381d38 (diff)
downloadop-kernel-dev-58691d64c44ae41ddf098ecb31e9a994026e3cff.zip
op-kernel-dev-58691d64c44ae41ddf098ecb31e9a994026e3cff.tar.gz
dmatest: add pq support
Test raid6 p+q operations with a simple "always multiply by 1" q calculation to fit into dmatest's current destination verification scheme. Reviewed-by: Andre Noll <maan@systemlinux.org> Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/dmatest.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index a27c0fb..a5ee541 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -43,6 +43,11 @@ module_param(xor_sources, uint, S_IRUGO);
MODULE_PARM_DESC(xor_sources,
"Number of xor source buffers (default: 3)");
+static unsigned int pq_sources = 3;
+module_param(pq_sources, uint, S_IRUGO);
+MODULE_PARM_DESC(pq_sources,
+ "Number of p+q source buffers (default: 3)");
+
/*
* Initialization patterns. All bytes in the source buffer has bit 7
* set, all bytes in the destination buffer has bit 7 cleared.
@@ -227,6 +232,7 @@ static int dmatest_func(void *data)
dma_cookie_t cookie;
enum dma_status status;
enum dma_ctrl_flags flags;
+ u8 pq_coefs[pq_sources];
int ret;
int src_cnt;
int dst_cnt;
@@ -243,6 +249,11 @@ static int dmatest_func(void *data)
else if (thread->type == DMA_XOR) {
src_cnt = xor_sources | 1; /* force odd to ensure dst = src */
dst_cnt = 1;
+ } else if (thread->type == DMA_PQ) {
+ src_cnt = pq_sources | 1; /* force odd to ensure dst = src */
+ dst_cnt = 2;
+ for (i = 0; i < pq_sources; i++)
+ pq_coefs[i] = 1;
} else
goto err_srcs;
@@ -310,6 +321,15 @@ static int dmatest_func(void *data)
dma_dsts[0] + dst_off,
dma_srcs, xor_sources,
len, flags);
+ else if (thread->type == DMA_PQ) {
+ dma_addr_t dma_pq[dst_cnt];
+
+ for (i = 0; i < dst_cnt; i++)
+ dma_pq[i] = dma_dsts[i] + dst_off;
+ tx = dev->device_prep_dma_pq(chan, dma_pq, dma_srcs,
+ pq_sources, pq_coefs,
+ len, flags);
+ }
if (!tx) {
for (i = 0; i < src_cnt; i++)
@@ -446,6 +466,8 @@ static int dmatest_add_threads(struct dmatest_chan *dtc, enum dma_transaction_ty
op = "copy";
else if (type == DMA_XOR)
op = "xor";
+ else if (type == DMA_PQ)
+ op = "pq";
else
return -EINVAL;
@@ -501,6 +523,10 @@ static int dmatest_add_channel(struct dma_chan *chan)
cnt = dmatest_add_threads(dtc, DMA_XOR);
thread_count += cnt > 0 ?: 0;
}
+ if (dma_has_cap(DMA_PQ, dma_dev->cap_mask)) {
+ cnt = dmatest_add_threads(dtc, DMA_PQ);
+ thread_count += cnt > 0 ?: 0;
+ }
pr_info("dmatest: Started %u threads using %s\n",
thread_count, dma_chan_name(chan));
OpenPOWER on IntegriCloud