forked from Minki/linux
dmatest: add xor test
Extend dmatest to launch a thread per supported operation type and add an xor test. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams
parent
729b5d1b8e
commit
b54d5cb915
@ -38,6 +38,11 @@ module_param(max_channels, uint, S_IRUGO);
|
||||
MODULE_PARM_DESC(max_channels,
|
||||
"Maximum number of channels to use (default: all)");
|
||||
|
||||
static unsigned int xor_sources = 3;
|
||||
module_param(xor_sources, uint, S_IRUGO);
|
||||
MODULE_PARM_DESC(xor_sources,
|
||||
"Number of xor 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.
|
||||
@ -59,8 +64,9 @@ struct dmatest_thread {
|
||||
struct list_head node;
|
||||
struct task_struct *task;
|
||||
struct dma_chan *chan;
|
||||
u8 *srcbuf;
|
||||
u8 *dstbuf;
|
||||
u8 **srcs;
|
||||
u8 **dsts;
|
||||
enum dma_transaction_type type;
|
||||
};
|
||||
|
||||
struct dmatest_chan {
|
||||
@ -98,30 +104,37 @@ static unsigned long dmatest_random(void)
|
||||
return buf;
|
||||
}
|
||||
|
||||
static void dmatest_init_srcbuf(u8 *buf, unsigned int start, unsigned int len)
|
||||
static void dmatest_init_srcs(u8 **bufs, unsigned int start, unsigned int len)
|
||||
{
|
||||
unsigned int i;
|
||||
u8 *buf;
|
||||
|
||||
for (i = 0; i < start; i++)
|
||||
buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK);
|
||||
for ( ; i < start + len; i++)
|
||||
buf[i] = PATTERN_SRC | PATTERN_COPY
|
||||
| (~i & PATTERN_COUNT_MASK);;
|
||||
for ( ; i < test_buf_size; i++)
|
||||
buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK);
|
||||
for (; (buf = *bufs); bufs++) {
|
||||
for (i = 0; i < start; i++)
|
||||
buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK);
|
||||
for ( ; i < start + len; i++)
|
||||
buf[i] = PATTERN_SRC | PATTERN_COPY
|
||||
| (~i & PATTERN_COUNT_MASK);;
|
||||
for ( ; i < test_buf_size; i++)
|
||||
buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK);
|
||||
buf++;
|
||||
}
|
||||
}
|
||||
|
||||
static void dmatest_init_dstbuf(u8 *buf, unsigned int start, unsigned int len)
|
||||
static void dmatest_init_dsts(u8 **bufs, unsigned int start, unsigned int len)
|
||||
{
|
||||
unsigned int i;
|
||||
u8 *buf;
|
||||
|
||||
for (i = 0; i < start; i++)
|
||||
buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK);
|
||||
for ( ; i < start + len; i++)
|
||||
buf[i] = PATTERN_DST | PATTERN_OVERWRITE
|
||||
| (~i & PATTERN_COUNT_MASK);
|
||||
for ( ; i < test_buf_size; i++)
|
||||
buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK);
|
||||
for (; (buf = *bufs); bufs++) {
|
||||
for (i = 0; i < start; i++)
|
||||
buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK);
|
||||
for ( ; i < start + len; i++)
|
||||
buf[i] = PATTERN_DST | PATTERN_OVERWRITE
|
||||
| (~i & PATTERN_COUNT_MASK);
|
||||
for ( ; i < test_buf_size; i++)
|
||||
buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK);
|
||||
}
|
||||
}
|
||||
|
||||
static void dmatest_mismatch(u8 actual, u8 pattern, unsigned int index,
|
||||
@ -150,23 +163,30 @@ static void dmatest_mismatch(u8 actual, u8 pattern, unsigned int index,
|
||||
thread_name, index, expected, actual);
|
||||
}
|
||||
|
||||
static unsigned int dmatest_verify(u8 *buf, unsigned int start,
|
||||
static unsigned int dmatest_verify(u8 **bufs, unsigned int start,
|
||||
unsigned int end, unsigned int counter, u8 pattern,
|
||||
bool is_srcbuf)
|
||||
{
|
||||
unsigned int i;
|
||||
unsigned int error_count = 0;
|
||||
u8 actual;
|
||||
u8 expected;
|
||||
u8 *buf;
|
||||
unsigned int counter_orig = counter;
|
||||
|
||||
for (i = start; i < end; i++) {
|
||||
actual = buf[i];
|
||||
if (actual != (pattern | (~counter & PATTERN_COUNT_MASK))) {
|
||||
if (error_count < 32)
|
||||
dmatest_mismatch(actual, pattern, i, counter,
|
||||
is_srcbuf);
|
||||
error_count++;
|
||||
for (; (buf = *bufs); bufs++) {
|
||||
counter = counter_orig;
|
||||
for (i = start; i < end; i++) {
|
||||
actual = buf[i];
|
||||
expected = pattern | (~counter & PATTERN_COUNT_MASK);
|
||||
if (actual != expected) {
|
||||
if (error_count < 32)
|
||||
dmatest_mismatch(actual, pattern, i,
|
||||
counter, is_srcbuf);
|
||||
error_count++;
|
||||
}
|
||||
counter++;
|
||||
}
|
||||
counter++;
|
||||
}
|
||||
|
||||
if (error_count > 32)
|
||||
@ -178,10 +198,10 @@ static unsigned int dmatest_verify(u8 *buf, unsigned int start,
|
||||
|
||||
/*
|
||||
* This function repeatedly tests DMA transfers of various lengths and
|
||||
* offsets until it is told to exit by kthread_stop(). There may be
|
||||
* multiple threads running this function in parallel for a single
|
||||
* channel, and there may be multiple channels being tested in
|
||||
* parallel.
|
||||
* offsets for a given operation type until it is told to exit by
|
||||
* kthread_stop(). There may be multiple threads running this function
|
||||
* in parallel for a single channel, and there may be multiple channels
|
||||
* being tested in parallel.
|
||||
*
|
||||
* Before each test, the source and destination buffer is initialized
|
||||
* with a known pattern. This pattern is different depending on
|
||||
@ -201,25 +221,53 @@ static int dmatest_func(void *data)
|
||||
unsigned int total_tests = 0;
|
||||
dma_cookie_t cookie;
|
||||
enum dma_status status;
|
||||
enum dma_ctrl_flags flags;
|
||||
int ret;
|
||||
int src_cnt;
|
||||
int dst_cnt;
|
||||
int i;
|
||||
|
||||
thread_name = current->comm;
|
||||
|
||||
ret = -ENOMEM;
|
||||
thread->srcbuf = kmalloc(test_buf_size, GFP_KERNEL);
|
||||
if (!thread->srcbuf)
|
||||
goto err_srcbuf;
|
||||
thread->dstbuf = kmalloc(test_buf_size, GFP_KERNEL);
|
||||
if (!thread->dstbuf)
|
||||
goto err_dstbuf;
|
||||
|
||||
smp_rmb();
|
||||
chan = thread->chan;
|
||||
if (thread->type == DMA_MEMCPY)
|
||||
src_cnt = dst_cnt = 1;
|
||||
else if (thread->type == DMA_XOR) {
|
||||
src_cnt = xor_sources | 1; /* force odd to ensure dst = src */
|
||||
dst_cnt = 1;
|
||||
} else
|
||||
goto err_srcs;
|
||||
|
||||
thread->srcs = kcalloc(src_cnt+1, sizeof(u8 *), GFP_KERNEL);
|
||||
if (!thread->srcs)
|
||||
goto err_srcs;
|
||||
for (i = 0; i < src_cnt; i++) {
|
||||
thread->srcs[i] = kmalloc(test_buf_size, GFP_KERNEL);
|
||||
if (!thread->srcs[i])
|
||||
goto err_srcbuf;
|
||||
}
|
||||
thread->srcs[i] = NULL;
|
||||
|
||||
thread->dsts = kcalloc(dst_cnt+1, sizeof(u8 *), GFP_KERNEL);
|
||||
if (!thread->dsts)
|
||||
goto err_dsts;
|
||||
for (i = 0; i < dst_cnt; i++) {
|
||||
thread->dsts[i] = kmalloc(test_buf_size, GFP_KERNEL);
|
||||
if (!thread->dsts[i])
|
||||
goto err_dstbuf;
|
||||
}
|
||||
thread->dsts[i] = NULL;
|
||||
|
||||
flags = DMA_CTRL_ACK | DMA_COMPL_SKIP_DEST_UNMAP;
|
||||
|
||||
while (!kthread_should_stop()) {
|
||||
struct dma_device *dev = chan->device;
|
||||
struct dma_async_tx_descriptor *tx;
|
||||
dma_addr_t dma_src, dma_dest;
|
||||
struct dma_async_tx_descriptor *tx = NULL;
|
||||
dma_addr_t dma_srcs[src_cnt];
|
||||
dma_addr_t dma_dsts[dst_cnt];
|
||||
|
||||
total_tests++;
|
||||
|
||||
@ -227,22 +275,41 @@ static int dmatest_func(void *data)
|
||||
src_off = dmatest_random() % (test_buf_size - len + 1);
|
||||
dst_off = dmatest_random() % (test_buf_size - len + 1);
|
||||
|
||||
dmatest_init_srcbuf(thread->srcbuf, src_off, len);
|
||||
dmatest_init_dstbuf(thread->dstbuf, dst_off, len);
|
||||
dmatest_init_srcs(thread->srcs, src_off, len);
|
||||
dmatest_init_dsts(thread->dsts, dst_off, len);
|
||||
|
||||
dma_src = dma_map_single(dev->dev, thread->srcbuf + src_off,
|
||||
len, DMA_TO_DEVICE);
|
||||
for (i = 0; i < src_cnt; i++) {
|
||||
u8 *buf = thread->srcs[i] + src_off;
|
||||
|
||||
dma_srcs[i] = dma_map_single(dev->dev, buf, len,
|
||||
DMA_TO_DEVICE);
|
||||
}
|
||||
/* map with DMA_BIDIRECTIONAL to force writeback/invalidate */
|
||||
dma_dest = dma_map_single(dev->dev, thread->dstbuf,
|
||||
test_buf_size, DMA_BIDIRECTIONAL);
|
||||
for (i = 0; i < dst_cnt; i++) {
|
||||
dma_dsts[i] = dma_map_single(dev->dev, thread->dsts[i],
|
||||
test_buf_size,
|
||||
DMA_BIDIRECTIONAL);
|
||||
}
|
||||
|
||||
if (thread->type == DMA_MEMCPY)
|
||||
tx = dev->device_prep_dma_memcpy(chan,
|
||||
dma_dsts[0] + dst_off,
|
||||
dma_srcs[0], len,
|
||||
flags);
|
||||
else if (thread->type == DMA_XOR)
|
||||
tx = dev->device_prep_dma_xor(chan,
|
||||
dma_dsts[0] + dst_off,
|
||||
dma_srcs, xor_sources,
|
||||
len, flags);
|
||||
|
||||
tx = dev->device_prep_dma_memcpy(chan, dma_dest + dst_off,
|
||||
dma_src, len,
|
||||
DMA_CTRL_ACK | DMA_COMPL_SKIP_DEST_UNMAP);
|
||||
if (!tx) {
|
||||
dma_unmap_single(dev->dev, dma_src, len, DMA_TO_DEVICE);
|
||||
dma_unmap_single(dev->dev, dma_dest,
|
||||
test_buf_size, DMA_BIDIRECTIONAL);
|
||||
for (i = 0; i < src_cnt; i++)
|
||||
dma_unmap_single(dev->dev, dma_srcs[i], len,
|
||||
DMA_TO_DEVICE);
|
||||
for (i = 0; i < dst_cnt; i++)
|
||||
dma_unmap_single(dev->dev, dma_dsts[i],
|
||||
test_buf_size,
|
||||
DMA_BIDIRECTIONAL);
|
||||
pr_warning("%s: #%u: prep error with src_off=0x%x "
|
||||
"dst_off=0x%x len=0x%x\n",
|
||||
thread_name, total_tests - 1,
|
||||
@ -263,11 +330,11 @@ static int dmatest_func(void *data)
|
||||
failed_tests++;
|
||||
continue;
|
||||
}
|
||||
dma_async_memcpy_issue_pending(chan);
|
||||
dma_async_issue_pending(chan);
|
||||
|
||||
do {
|
||||
msleep(1);
|
||||
status = dma_async_memcpy_complete(
|
||||
status = dma_async_is_tx_complete(
|
||||
chan, cookie, NULL, NULL);
|
||||
} while (status == DMA_IN_PROGRESS);
|
||||
|
||||
@ -278,29 +345,30 @@ static int dmatest_func(void *data)
|
||||
continue;
|
||||
}
|
||||
/* Unmap by myself (see DMA_COMPL_SKIP_DEST_UNMAP above) */
|
||||
dma_unmap_single(dev->dev, dma_dest,
|
||||
test_buf_size, DMA_BIDIRECTIONAL);
|
||||
for (i = 0; i < dst_cnt; i++)
|
||||
dma_unmap_single(dev->dev, dma_dsts[i], test_buf_size,
|
||||
DMA_BIDIRECTIONAL);
|
||||
|
||||
error_count = 0;
|
||||
|
||||
pr_debug("%s: verifying source buffer...\n", thread_name);
|
||||
error_count += dmatest_verify(thread->srcbuf, 0, src_off,
|
||||
error_count += dmatest_verify(thread->srcs, 0, src_off,
|
||||
0, PATTERN_SRC, true);
|
||||
error_count += dmatest_verify(thread->srcbuf, src_off,
|
||||
error_count += dmatest_verify(thread->srcs, src_off,
|
||||
src_off + len, src_off,
|
||||
PATTERN_SRC | PATTERN_COPY, true);
|
||||
error_count += dmatest_verify(thread->srcbuf, src_off + len,
|
||||
error_count += dmatest_verify(thread->srcs, src_off + len,
|
||||
test_buf_size, src_off + len,
|
||||
PATTERN_SRC, true);
|
||||
|
||||
pr_debug("%s: verifying dest buffer...\n",
|
||||
thread->task->comm);
|
||||
error_count += dmatest_verify(thread->dstbuf, 0, dst_off,
|
||||
error_count += dmatest_verify(thread->dsts, 0, dst_off,
|
||||
0, PATTERN_DST, false);
|
||||
error_count += dmatest_verify(thread->dstbuf, dst_off,
|
||||
error_count += dmatest_verify(thread->dsts, dst_off,
|
||||
dst_off + len, src_off,
|
||||
PATTERN_SRC | PATTERN_COPY, false);
|
||||
error_count += dmatest_verify(thread->dstbuf, dst_off + len,
|
||||
error_count += dmatest_verify(thread->dsts, dst_off + len,
|
||||
test_buf_size, dst_off + len,
|
||||
PATTERN_DST, false);
|
||||
|
||||
@ -319,10 +387,16 @@ static int dmatest_func(void *data)
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
kfree(thread->dstbuf);
|
||||
for (i = 0; thread->dsts[i]; i++)
|
||||
kfree(thread->dsts[i]);
|
||||
err_dstbuf:
|
||||
kfree(thread->srcbuf);
|
||||
kfree(thread->dsts);
|
||||
err_dsts:
|
||||
for (i = 0; thread->srcs[i]; i++)
|
||||
kfree(thread->srcs[i]);
|
||||
err_srcbuf:
|
||||
kfree(thread->srcs);
|
||||
err_srcs:
|
||||
pr_notice("%s: terminating after %u tests, %u failures (status %d)\n",
|
||||
thread_name, total_tests, failed_tests, ret);
|
||||
return ret;
|
||||
@ -344,11 +418,54 @@ static void dmatest_cleanup_channel(struct dmatest_chan *dtc)
|
||||
kfree(dtc);
|
||||
}
|
||||
|
||||
static int dmatest_add_threads(struct dmatest_chan *dtc, enum dma_transaction_type type)
|
||||
{
|
||||
struct dmatest_thread *thread;
|
||||
struct dma_chan *chan = dtc->chan;
|
||||
char *op;
|
||||
unsigned int i;
|
||||
|
||||
if (type == DMA_MEMCPY)
|
||||
op = "copy";
|
||||
else if (type == DMA_XOR)
|
||||
op = "xor";
|
||||
else
|
||||
return -EINVAL;
|
||||
|
||||
for (i = 0; i < threads_per_chan; i++) {
|
||||
thread = kzalloc(sizeof(struct dmatest_thread), GFP_KERNEL);
|
||||
if (!thread) {
|
||||
pr_warning("dmatest: No memory for %s-%s%u\n",
|
||||
dma_chan_name(chan), op, i);
|
||||
|
||||
break;
|
||||
}
|
||||
thread->chan = dtc->chan;
|
||||
thread->type = type;
|
||||
smp_wmb();
|
||||
thread->task = kthread_run(dmatest_func, thread, "%s-%s%u",
|
||||
dma_chan_name(chan), op, i);
|
||||
if (IS_ERR(thread->task)) {
|
||||
pr_warning("dmatest: Failed to run thread %s-%s%u\n",
|
||||
dma_chan_name(chan), op, i);
|
||||
kfree(thread);
|
||||
break;
|
||||
}
|
||||
|
||||
/* srcbuf and dstbuf are allocated by the thread itself */
|
||||
|
||||
list_add_tail(&thread->node, &dtc->threads);
|
||||
}
|
||||
|
||||
return i;
|
||||
}
|
||||
|
||||
static int dmatest_add_channel(struct dma_chan *chan)
|
||||
{
|
||||
struct dmatest_chan *dtc;
|
||||
struct dmatest_thread *thread;
|
||||
unsigned int i;
|
||||
struct dma_device *dma_dev = chan->device;
|
||||
unsigned int thread_count = 0;
|
||||
unsigned int cnt;
|
||||
|
||||
dtc = kmalloc(sizeof(struct dmatest_chan), GFP_KERNEL);
|
||||
if (!dtc) {
|
||||
@ -359,30 +476,17 @@ static int dmatest_add_channel(struct dma_chan *chan)
|
||||
dtc->chan = chan;
|
||||
INIT_LIST_HEAD(&dtc->threads);
|
||||
|
||||
for (i = 0; i < threads_per_chan; i++) {
|
||||
thread = kzalloc(sizeof(struct dmatest_thread), GFP_KERNEL);
|
||||
if (!thread) {
|
||||
pr_warning("dmatest: No memory for %s-test%u\n",
|
||||
dma_chan_name(chan), i);
|
||||
break;
|
||||
}
|
||||
thread->chan = dtc->chan;
|
||||
smp_wmb();
|
||||
thread->task = kthread_run(dmatest_func, thread, "%s-test%u",
|
||||
dma_chan_name(chan), i);
|
||||
if (IS_ERR(thread->task)) {
|
||||
pr_warning("dmatest: Failed to run thread %s-test%u\n",
|
||||
dma_chan_name(chan), i);
|
||||
kfree(thread);
|
||||
break;
|
||||
}
|
||||
|
||||
/* srcbuf and dstbuf are allocated by the thread itself */
|
||||
|
||||
list_add_tail(&thread->node, &dtc->threads);
|
||||
if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) {
|
||||
cnt = dmatest_add_threads(dtc, DMA_MEMCPY);
|
||||
thread_count += cnt > 0 ?: 0;
|
||||
}
|
||||
if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) {
|
||||
cnt = dmatest_add_threads(dtc, DMA_XOR);
|
||||
thread_count += cnt > 0 ?: 0;
|
||||
}
|
||||
|
||||
pr_info("dmatest: Started %u threads using %s\n", i, dma_chan_name(chan));
|
||||
pr_info("dmatest: Started %u threads using %s\n",
|
||||
thread_count, dma_chan_name(chan));
|
||||
|
||||
list_add_tail(&dtc->node, &dmatest_channels);
|
||||
nr_channels++;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user