Commit 58691d64 authored by Dan Williams's avatar Dan Williams

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: default avatarAndre Noll <maan@systemlinux.org>
Acked-by: default avatarMaciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 0a82a623
......@@ -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));
......
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