redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

dmaengine: dmatest: Add support for scatter-gather DMA mode 

This patch updates the dmatest client to
Support scatter-gather dma mode.

Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
hifive-unleashed-5.1
Kedareswara rao Appana 2016-06-09 21:10:14 +05:30 committed by Vinod Koul
parent ad31aa8fed
commit a0d4cb44da
1 changed files with 41 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
drivers/dma/dmatest.c
View File

@ -51,6 +51,16 @@ module_param(iterations, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(iterations,
"Iterations before stopping test (default: infinite)");
static unsigned int sg_buffers = 1;
module_param(sg_buffers, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(sg_buffers,
"Number of scatter gather buffers (default: 1)");
static unsigned int dmatest = 1;
module_param(dmatest, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(dmatest,
"dmatest 0-memcpy 1-slave_sg (default: 1)");
static unsigned int xor_sources = 3;
module_param(xor_sources, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(xor_sources,
@ -431,6 +441,8 @@ static int dmatest_func(void *data)
dev = chan->device;
if (thread->type == DMA_MEMCPY)
src_cnt = dst_cnt = 1;
else if (thread->type == DMA_SG)
src_cnt = dst_cnt = sg_buffers;
else if (thread->type == DMA_XOR) {
/* force odd to ensure dst = src */
src_cnt = min_odd(params->xor_sources | 1, dev->max_xor);
@ -485,6 +497,8 @@ static int dmatest_func(void *data)
dma_addr_t *dsts;
unsigned int src_off, dst_off, len;
u8 align = 0;
struct scatterlist tx_sg[src_cnt];
struct scatterlist rx_sg[src_cnt];
total_tests++;
@ -577,10 +591,22 @@ static int dmatest_func(void *data)
um->bidi_cnt++;
}
sg_init_table(tx_sg, src_cnt);
sg_init_table(rx_sg, src_cnt);
for (i = 0; i < src_cnt; i++) {
sg_dma_address(&rx_sg[i]) = srcs[i];
sg_dma_address(&tx_sg[i]) = dsts[i] + dst_off;
sg_dma_len(&tx_sg[i]) = len;
sg_dma_len(&rx_sg[i]) = len;
}
if (thread->type == DMA_MEMCPY)
tx = dev->device_prep_dma_memcpy(chan,
dsts[0] + dst_off,
srcs[0], len, flags);
else if (thread->type == DMA_SG)
tx = dev->device_prep_dma_sg(chan, tx_sg, src_cnt,
rx_sg, src_cnt, flags);
else if (thread->type == DMA_XOR)
tx = dev->device_prep_dma_xor(chan,
dsts[0] + dst_off,
@ -748,6 +774,8 @@ static int dmatest_add_threads(struct dmatest_info *info,
if (type == DMA_MEMCPY)
op = "copy";
else if (type == DMA_SG)
op = "sg";
else if (type == DMA_XOR)
op = "xor";
else if (type == DMA_PQ)
@ -802,9 +830,19 @@ static int dmatest_add_channel(struct dmatest_info *info,
INIT_LIST_HEAD(&dtc->threads);
if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) {
cnt = dmatest_add_threads(info, dtc, DMA_MEMCPY);
thread_count += cnt > 0 ? cnt : 0;
if (dmatest == 0) {
cnt = dmatest_add_threads(info, dtc, DMA_MEMCPY);
thread_count += cnt > 0 ? cnt : 0;
}
}
if (dma_has_cap(DMA_SG, dma_dev->cap_mask)) {
if (dmatest == 1) {
cnt = dmatest_add_threads(info, dtc, DMA_SG);
thread_count += cnt > 0 ? cnt : 0;
}
}
if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) {
cnt = dmatest_add_threads(info, dtc, DMA_XOR);
thread_count += cnt > 0 ? cnt : 0;
@ -877,6 +915,7 @@ static void run_threaded_test(struct dmatest_info *info)
request_channels(info, DMA_MEMCPY);
request_channels(info, DMA_XOR);
request_channels(info, DMA_SG);
request_channels(info, DMA_PQ);
}