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Date: Mon, 4 Mar 2013 11:09:29 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: linux-kernel@...r.kernel.org, Vinod Koul <vinod.koul@...el.com>,
Viresh Kumar <viresh.kumar@...aro.org>,
Andrew Morton <akpm@...ux-foundation.org>
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH 05/10] dmatest: split test parameters to separate structure
Better to keep test parameters separate from internal variables.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
drivers/dma/dmatest.c | 109 ++++++++++++++++++++++++++++----------------------
1 file changed, 62 insertions(+), 47 deletions(-)
diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 475a21a..c6e5d83 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -97,7 +97,7 @@ struct dmatest_chan {
};
/**
- * struct dmatest_info - test information.
+ * struct dmatest_params - test parameters.
* @buf_size: size of the memcpy test buffer
* @channel: bus ID of the channel to test
* @device: bus ID of the DMA Engine to test
@@ -108,8 +108,7 @@ struct dmatest_chan {
* @pq_sources: number of p+q source buffers
* @timeout: transfer timeout in msec, -1 for infinite timeout
*/
-struct dmatest_info {
- /* Test parameters */
+struct dmatest_params {
unsigned int buf_size;
char channel[20];
char device[20];
@@ -119,6 +118,15 @@ struct dmatest_info {
unsigned int xor_sources;
unsigned int pq_sources;
int timeout;
+};
+
+/**
+ * struct dmatest_info - test information.
+ * @params: test parameters
+ */
+struct dmatest_info {
+ /* Test parameters */
+ struct dmatest_params params;
/* Internal state */
struct list_head channels;
@@ -127,20 +135,20 @@ struct dmatest_info {
static struct dmatest_info test_info;
-static bool dmatest_match_channel(struct dmatest_info *info,
+static bool dmatest_match_channel(struct dmatest_params *params,
struct dma_chan *chan)
{
- if (info->channel[0] == '\0')
+ if (params->channel[0] == '\0')
return true;
- return strcmp(dma_chan_name(chan), info->channel) == 0;
+ return strcmp(dma_chan_name(chan), params->channel) == 0;
}
-static bool dmatest_match_device(struct dmatest_info *info,
+static bool dmatest_match_device(struct dmatest_params *params,
struct dma_device *device)
{
- if (info->device[0] == '\0')
+ if (params->device[0] == '\0')
return true;
- return strcmp(dev_name(device->dev), info->device) == 0;
+ return strcmp(dev_name(device->dev), params->device) == 0;
}
static unsigned long dmatest_random(void)
@@ -300,6 +308,7 @@ static int dmatest_func(void *data)
struct dmatest_thread *thread = data;
struct dmatest_done done = { .wait = &done_wait };
struct dmatest_info *info;
+ struct dmatest_params *params;
struct dma_chan *chan;
struct dma_device *dev;
const char *thread_name;
@@ -323,20 +332,21 @@ static int dmatest_func(void *data)
smp_rmb();
info = thread->info;
+ params = &info->params;
chan = thread->chan;
dev = chan->device;
if (thread->type == DMA_MEMCPY)
src_cnt = dst_cnt = 1;
else if (thread->type == DMA_XOR) {
/* force odd to ensure dst = src */
- src_cnt = min_odd(info->xor_sources | 1, dev->max_xor);
+ src_cnt = min_odd(params->xor_sources | 1, dev->max_xor);
dst_cnt = 1;
} else if (thread->type == DMA_PQ) {
/* force odd to ensure dst = src */
- src_cnt = min_odd(info->pq_sources | 1, dma_maxpq(dev, 0));
+ src_cnt = min_odd(params->pq_sources | 1, dma_maxpq(dev, 0));
dst_cnt = 2;
- pq_coefs = kmalloc(info->pq_sources+1, GFP_KERNEL);
+ pq_coefs = kmalloc(params->pq_sources+1, GFP_KERNEL);
if (!pq_coefs)
goto err_thread_type;
@@ -349,7 +359,7 @@ static int dmatest_func(void *data)
if (!thread->srcs)
goto err_srcs;
for (i = 0; i < src_cnt; i++) {
- thread->srcs[i] = kmalloc(info->buf_size, GFP_KERNEL);
+ thread->srcs[i] = kmalloc(params->buf_size, GFP_KERNEL);
if (!thread->srcs[i])
goto err_srcbuf;
}
@@ -359,7 +369,7 @@ static int dmatest_func(void *data)
if (!thread->dsts)
goto err_dsts;
for (i = 0; i < dst_cnt; i++) {
- thread->dsts[i] = kmalloc(info->buf_size, GFP_KERNEL);
+ thread->dsts[i] = kmalloc(params->buf_size, GFP_KERNEL);
if (!thread->dsts[i])
goto err_dstbuf;
}
@@ -375,7 +385,7 @@ static int dmatest_func(void *data)
| DMA_COMPL_SKIP_DEST_UNMAP | DMA_COMPL_SRC_UNMAP_SINGLE;
while (!kthread_should_stop()
- && !(info->iterations && total_tests >= info->iterations)) {
+ && !(params->iterations && total_tests >= params->iterations)) {
struct dma_async_tx_descriptor *tx = NULL;
dma_addr_t dma_srcs[src_cnt];
dma_addr_t dma_dsts[dst_cnt];
@@ -391,24 +401,24 @@ static int dmatest_func(void *data)
else if (thread->type == DMA_PQ)
align = dev->pq_align;
- if (1 << align > info->buf_size) {
+ if (1 << align > params->buf_size) {
pr_err("%u-byte buffer too small for %d-byte alignment\n",
- info->buf_size, 1 << align);
+ params->buf_size, 1 << align);
break;
}
- len = dmatest_random() % info->buf_size + 1;
+ len = dmatest_random() % params->buf_size + 1;
len = (len >> align) << align;
if (!len)
len = 1 << align;
- src_off = dmatest_random() % (info->buf_size - len + 1);
- dst_off = dmatest_random() % (info->buf_size - len + 1);
+ src_off = dmatest_random() % (params->buf_size - len + 1);
+ dst_off = dmatest_random() % (params->buf_size - len + 1);
src_off = (src_off >> align) << align;
dst_off = (dst_off >> align) << align;
- dmatest_init_srcs(thread->srcs, src_off, len, info->buf_size);
- dmatest_init_dsts(thread->dsts, dst_off, len, info->buf_size);
+ dmatest_init_srcs(thread->srcs, src_off, len, params->buf_size);
+ dmatest_init_dsts(thread->dsts, dst_off, len, params->buf_size);
for (i = 0; i < src_cnt; i++) {
u8 *buf = thread->srcs[i] + src_off;
@@ -429,16 +439,17 @@ static int dmatest_func(void *data)
/* map with DMA_BIDIRECTIONAL to force writeback/invalidate */
for (i = 0; i < dst_cnt; i++) {
dma_dsts[i] = dma_map_single(dev->dev, thread->dsts[i],
- info->buf_size,
+ params->buf_size,
DMA_BIDIRECTIONAL);
ret = dma_mapping_error(dev->dev, dma_dsts[i]);
if (ret) {
unmap_src(dev->dev, dma_srcs, len, src_cnt);
- unmap_dst(dev->dev, dma_dsts, info->buf_size, i);
+ unmap_dst(dev->dev, dma_dsts, params->buf_size,
+ i);
pr_warn("%s: #%u: mapping error %d with "
"dst_off=0x%x len=0x%x\n",
thread_name, total_tests - 1, ret,
- dst_off, info->buf_size);
+ dst_off, params->buf_size);
failed_tests++;
continue;
}
@@ -466,7 +477,8 @@ static int dmatest_func(void *data)
if (!tx) {
unmap_src(dev->dev, dma_srcs, len, src_cnt);
- unmap_dst(dev->dev, dma_dsts, info->buf_size, dst_cnt);
+ unmap_dst(dev->dev, dma_dsts, params->buf_size,
+ dst_cnt);
pr_warning("%s: #%u: prep error with src_off=0x%x "
"dst_off=0x%x len=0x%x\n",
thread_name, total_tests - 1,
@@ -494,7 +506,7 @@ static int dmatest_func(void *data)
wait_event_freezable_timeout(done_wait,
done.done || kthread_should_stop(),
- msecs_to_jiffies(info->timeout));
+ msecs_to_jiffies(params->timeout));
status = dma_async_is_tx_complete(chan, cookie, NULL, NULL);
@@ -521,7 +533,7 @@ static int dmatest_func(void *data)
}
/* Unmap by myself (see DMA_COMPL_SKIP_DEST_UNMAP above) */
- unmap_dst(dev->dev, dma_dsts, info->buf_size, dst_cnt);
+ unmap_dst(dev->dev, dma_dsts, params->buf_size, dst_cnt);
error_count = 0;
@@ -532,7 +544,7 @@ static int dmatest_func(void *data)
src_off + len, src_off,
PATTERN_SRC | PATTERN_COPY, true);
error_count += dmatest_verify(thread->srcs, src_off + len,
- info->buf_size, src_off + len,
+ params->buf_size, src_off + len,
PATTERN_SRC, true);
pr_debug("%s: verifying dest buffer...\n",
@@ -543,7 +555,7 @@ static int dmatest_func(void *data)
dst_off + len, src_off,
PATTERN_SRC | PATTERN_COPY, false);
error_count += dmatest_verify(thread->dsts, dst_off + len,
- info->buf_size, dst_off + len,
+ params->buf_size, dst_off + len,
PATTERN_DST, false);
if (error_count) {
@@ -580,7 +592,7 @@ err_thread_type:
if (ret)
dmaengine_terminate_all(chan);
- if (info->iterations > 0)
+ if (params->iterations > 0)
while (!kthread_should_stop()) {
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wait_dmatest_exit);
interruptible_sleep_on(&wait_dmatest_exit);
@@ -612,6 +624,7 @@ static void dmatest_cleanup_channel(struct dmatest_chan *dtc)
static int dmatest_add_threads(struct dmatest_info *info,
struct dmatest_chan *dtc, enum dma_transaction_type type)
{
+ struct dmatest_params *params = &info->params;
struct dmatest_thread *thread;
struct dma_chan *chan = dtc->chan;
char *op;
@@ -626,7 +639,7 @@ static int dmatest_add_threads(struct dmatest_info *info,
else
return -EINVAL;
- for (i = 0; i < info->threads_per_chan; i++) {
+ for (i = 0; i < params->threads_per_chan; i++) {
thread = kzalloc(sizeof(struct dmatest_thread), GFP_KERNEL);
if (!thread) {
pr_warning("dmatest: No memory for %s-%s%u\n",
@@ -696,10 +709,10 @@ static int dmatest_add_channel(struct dmatest_info *info,
static bool filter(struct dma_chan *chan, void *param)
{
- struct dmatest_info *info = param;
+ struct dmatest_params *params = param;
- if (!dmatest_match_channel(info, chan) ||
- !dmatest_match_device(info, chan->device))
+ if (!dmatest_match_channel(params, chan) ||
+ !dmatest_match_device(params, chan->device))
return false;
else
return true;
@@ -709,12 +722,13 @@ static int run_threaded_test(struct dmatest_info *info)
{
dma_cap_mask_t mask;
struct dma_chan *chan;
+ struct dmatest_params *params = &info->params;
int err = 0;
dma_cap_zero(mask);
dma_cap_set(DMA_MEMCPY, mask);
for (;;) {
- chan = dma_request_channel(mask, filter, info);
+ chan = dma_request_channel(mask, filter, params);
if (chan) {
err = dmatest_add_channel(info, chan);
if (err) {
@@ -723,8 +737,8 @@ static int run_threaded_test(struct dmatest_info *info)
}
} else
break; /* no more channels available */
- if (info->max_channels &&
- info->nr_channels >= info->max_channels)
+ if (params->max_channels &&
+ info->nr_channels >= params->max_channels)
break; /* we have all we need */
}
return err;
@@ -749,21 +763,22 @@ static void stop_threaded_test(struct dmatest_info *info)
static int __init dmatest_init(void)
{
struct dmatest_info *info = &test_info;
+ struct dmatest_params *params = &info->params;
memset(info, 0, sizeof(*info));
INIT_LIST_HEAD(&info->channels);
/* Set default parameters */
- info->buf_size = test_buf_size;
- strlcpy(info->channel, test_channel, sizeof(info->channel));
- strlcpy(info->device, test_device, sizeof(info->device));
- info->threads_per_chan = threads_per_chan;
- info->max_channels = max_channels;
- info->iterations = iterations;
- info->xor_sources = xor_sources;
- info->pq_sources = pq_sources;
- info->timeout = timeout;
+ params->buf_size = test_buf_size;
+ strlcpy(params->channel, test_channel, sizeof(params->channel));
+ strlcpy(params->device, test_device, sizeof(params->device));
+ params->threads_per_chan = threads_per_chan;
+ params->max_channels = max_channels;
+ params->iterations = iterations;
+ params->xor_sources = xor_sources;
+ params->pq_sources = pq_sources;
+ params->timeout = timeout;
return run_threaded_test(info);
}
--
1.8.2.rc0.22.gb3600c3
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