#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/random.h>
+#include <linux/slab.h>
#include <linux/wait.h>
static unsigned int test_buf_size = 16384;
static unsigned int max_channels;
module_param(max_channels, uint, S_IRUGO);
-MODULE_PARM_DESC(nr_channels,
+MODULE_PARM_DESC(max_channels,
"Maximum number of channels to use (default: all)");
+static unsigned int iterations;
+module_param(iterations, uint, S_IRUGO);
+MODULE_PARM_DESC(iterations,
+ "Iterations before stopping test (default: infinite)");
+
+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)");
+
+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.
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 {
/*
* These are protected by dma_list_mutex since they're only used by
- * the DMA client event callback
+ * the DMA filter function callback
*/
static LIST_HEAD(dmatest_channels);
static unsigned int nr_channels;
{
if (test_channel[0] == '\0')
return true;
- return strcmp(dev_name(&chan->dev), test_channel) == 0;
+ return strcmp(dma_chan_name(chan), test_channel) == 0;
}
static bool dmatest_match_device(struct dma_device *device)
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;
-
- 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);
+ u8 *buf;
+
+ 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;
-
- 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);
+ u8 *buf;
+
+ 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,
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;
-
- 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++;
+ u8 expected;
+ u8 *buf;
+ unsigned int counter_orig = counter;
+
+ 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)
return error_count;
}
+static void dmatest_callback(void *completion)
+{
+ complete(completion);
+}
+
/*
* 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
unsigned int total_tests = 0;
dma_cookie_t cookie;
enum dma_status status;
+ enum dma_ctrl_flags flags;
+ u8 pq_coefs[pq_sources + 1];
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 if (thread->type == DMA_PQ) {
+ src_cnt = pq_sources | 1; /* force odd to ensure dst = src */
+ dst_cnt = 2;
+ for (i = 0; i < src_cnt; i++)
+ pq_coefs[i] = 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;
+
+ set_user_nice(current, 10);
+
+ flags = DMA_CTRL_ACK | DMA_COMPL_SKIP_DEST_UNMAP | DMA_PREP_INTERRUPT;
+
+ while (!kthread_should_stop()
+ && !(iterations && total_tests >= iterations)) {
+ struct dma_device *dev = chan->device;
+ struct dma_async_tx_descriptor *tx = NULL;
+ dma_addr_t dma_srcs[src_cnt];
+ dma_addr_t dma_dsts[dst_cnt];
+ struct completion cmp;
+ unsigned long tmo = msecs_to_jiffies(3000);
+ u8 align = 0;
- while (!kthread_should_stop()) {
total_tests++;
+ /* honor alignment restrictions */
+ if (thread->type == DMA_MEMCPY)
+ align = dev->copy_align;
+ else if (thread->type == DMA_XOR)
+ align = dev->xor_align;
+ else if (thread->type == DMA_PQ)
+ align = dev->pq_align;
+
+ if (1 << align > test_buf_size) {
+ pr_err("%u-byte buffer too small for %d-byte alignment\n",
+ test_buf_size, 1 << align);
+ break;
+ }
+
len = dmatest_random() % test_buf_size + 1;
+ len = (len >> align) << align;
+ if (!len)
+ len = 1 << align;
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);
+ src_off = (src_off >> align) << align;
+ dst_off = (dst_off >> align) << align;
+
+ dmatest_init_srcs(thread->srcs, src_off, len);
+ dmatest_init_dsts(thread->dsts, dst_off, len);
+
+ 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 */
+ 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, src_cnt,
+ 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,
+ src_cnt, pq_coefs,
+ len, flags);
+ }
+
+ if (!tx) {
+ 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,
+ src_off, dst_off, len);
+ msleep(100);
+ failed_tests++;
+ continue;
+ }
+
+ init_completion(&cmp);
+ tx->callback = dmatest_callback;
+ tx->callback_param = &cmp;
+ cookie = tx->tx_submit(tx);
- cookie = dma_async_memcpy_buf_to_buf(chan,
- thread->dstbuf + dst_off,
- thread->srcbuf + src_off,
- len);
if (dma_submit_error(cookie)) {
pr_warning("%s: #%u: submit error %d with src_off=0x%x "
"dst_off=0x%x len=0x%x\n",
failed_tests++;
continue;
}
- dma_async_memcpy_issue_pending(chan);
+ dma_async_issue_pending(chan);
- do {
- msleep(1);
- status = dma_async_memcpy_complete(
- chan, cookie, NULL, NULL);
- } while (status == DMA_IN_PROGRESS);
+ tmo = wait_for_completion_timeout(&cmp, tmo);
+ status = dma_async_is_tx_complete(chan, cookie, NULL, NULL);
- if (status == DMA_ERROR) {
- pr_warning("%s: #%u: error during copy\n",
- thread_name, total_tests - 1);
+ if (tmo == 0) {
+ pr_warning("%s: #%u: test timed out\n",
+ thread_name, total_tests - 1);
+ failed_tests++;
+ continue;
+ } else if (status != DMA_SUCCESS) {
+ pr_warning("%s: #%u: got completion callback,"
+ " but status is \'%s\'\n",
+ thread_name, total_tests - 1,
+ status == DMA_ERROR ? "error" : "in progress");
failed_tests++;
continue;
}
+ /* Unmap by myself (see DMA_COMPL_SKIP_DEST_UNMAP above) */
+ 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);
}
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);
+
+ if (iterations > 0)
+ while (!kthread_should_stop()) {
+ DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wait_dmatest_exit);
+ interruptible_sleep_on(&wait_dmatest_exit);
+ }
+
return ret;
}
kfree(dtc);
}
-static enum dma_state_client dmatest_add_channel(struct dma_chan *chan)
+static int dmatest_add_threads(struct dmatest_chan *dtc, enum dma_transaction_type type)
{
- struct dmatest_chan *dtc;
- struct dmatest_thread *thread;
- unsigned int i;
-
- /* Have we already been told about this channel? */
- list_for_each_entry(dtc, &dmatest_channels, node)
- if (dtc->chan == chan)
- return DMA_DUP;
-
- dtc = kmalloc(sizeof(struct dmatest_chan), GFP_KERNEL);
- if (!dtc) {
- pr_warning("dmatest: No memory for %s\n", dev_name(&chan->dev));
- return DMA_NAK;
- }
+ struct dmatest_thread *thread;
+ struct dma_chan *chan = dtc->chan;
+ char *op;
+ unsigned int i;
- dtc->chan = chan;
- INIT_LIST_HEAD(&dtc->threads);
+ if (type == DMA_MEMCPY)
+ op = "copy";
+ else if (type == DMA_XOR)
+ op = "xor";
+ else if (type == DMA_PQ)
+ op = "pq";
+ 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-test%u\n",
- dev_name(&chan->dev), i);
+ 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-test%u",
- dev_name(&chan->dev), i);
+ 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-test%u\n",
- dev_name(&chan->dev), i);
+ pr_warning("dmatest: Failed to run thread %s-%s%u\n",
+ dma_chan_name(chan), op, i);
kfree(thread);
break;
}
list_add_tail(&thread->node, &dtc->threads);
}
- pr_info("dmatest: Started %u threads using %s\n", i, dev_name(&chan->dev));
-
- list_add_tail(&dtc->node, &dmatest_channels);
- nr_channels++;
-
- return DMA_ACK;
+ return i;
}
-static enum dma_state_client dmatest_remove_channel(struct dma_chan *chan)
+static int dmatest_add_channel(struct dma_chan *chan)
{
- struct dmatest_chan *dtc, *_dtc;
+ struct dmatest_chan *dtc;
+ struct dma_device *dma_dev = chan->device;
+ unsigned int thread_count = 0;
+ unsigned int cnt;
- list_for_each_entry_safe(dtc, _dtc, &dmatest_channels, node) {
- if (dtc->chan == chan) {
- list_del(&dtc->node);
- dmatest_cleanup_channel(dtc);
- pr_debug("dmatest: lost channel %s\n",
- dev_name(&chan->dev));
- return DMA_ACK;
- }
+ dtc = kmalloc(sizeof(struct dmatest_chan), GFP_KERNEL);
+ if (!dtc) {
+ pr_warning("dmatest: No memory for %s\n", dma_chan_name(chan));
+ return -ENOMEM;
}
- return DMA_DUP;
-}
+ dtc->chan = chan;
+ INIT_LIST_HEAD(&dtc->threads);
-/*
- * Start testing threads as new channels are assigned to us, and kill
- * them when the channels go away.
- *
- * When we unregister the client, all channels are removed so this
- * will also take care of cleaning things up when the module is
- * unloaded.
- */
-static enum dma_state_client
-dmatest_event(struct dma_client *client, struct dma_chan *chan,
- enum dma_state state)
-{
- enum dma_state_client ack = DMA_NAK;
-
- switch (state) {
- case DMA_RESOURCE_AVAILABLE:
- if (!dmatest_match_channel(chan)
- || !dmatest_match_device(chan->device))
- ack = DMA_DUP;
- else if (max_channels && nr_channels >= max_channels)
- ack = DMA_NAK;
- else
- ack = dmatest_add_channel(chan);
- break;
-
- case DMA_RESOURCE_REMOVED:
- ack = dmatest_remove_channel(chan);
- break;
-
- default:
- pr_info("dmatest: Unhandled event %u (%s)\n",
- state, dev_name(&chan->dev));
- break;
+ if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) {
+ cnt = dmatest_add_threads(dtc, DMA_MEMCPY);
+ thread_count += cnt > 0 ? cnt : 0;
+ }
+ if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) {
+ cnt = dmatest_add_threads(dtc, DMA_XOR);
+ thread_count += cnt > 0 ? cnt : 0;
+ }
+ if (dma_has_cap(DMA_PQ, dma_dev->cap_mask)) {
+ cnt = dmatest_add_threads(dtc, DMA_PQ);
+ thread_count += cnt > 0 ?: 0;
}
- return ack;
+ pr_info("dmatest: Started %u threads using %s\n",
+ thread_count, dma_chan_name(chan));
+
+ list_add_tail(&dtc->node, &dmatest_channels);
+ nr_channels++;
+
+ return 0;
}
-static struct dma_client dmatest_client = {
- .event_callback = dmatest_event,
-};
+static bool filter(struct dma_chan *chan, void *param)
+{
+ if (!dmatest_match_channel(chan) || !dmatest_match_device(chan->device))
+ return false;
+ else
+ return true;
+}
static int __init dmatest_init(void)
{
- dma_cap_set(DMA_MEMCPY, dmatest_client.cap_mask);
- dma_async_client_register(&dmatest_client);
- dma_async_client_chan_request(&dmatest_client);
+ dma_cap_mask_t mask;
+ struct dma_chan *chan;
+ int err = 0;
+
+ dma_cap_zero(mask);
+ dma_cap_set(DMA_MEMCPY, mask);
+ for (;;) {
+ chan = dma_request_channel(mask, filter, NULL);
+ if (chan) {
+ err = dmatest_add_channel(chan);
+ if (err) {
+ dma_release_channel(chan);
+ break; /* add_channel failed, punt */
+ }
+ } else
+ break; /* no more channels available */
+ if (max_channels && nr_channels >= max_channels)
+ break; /* we have all we need */
+ }
- return 0;
+ return err;
}
-module_init(dmatest_init);
+/* when compiled-in wait for drivers to load first */
+late_initcall(dmatest_init);
static void __exit dmatest_exit(void)
{
- dma_async_client_unregister(&dmatest_client);
+ struct dmatest_chan *dtc, *_dtc;
+ struct dma_chan *chan;
+
+ list_for_each_entry_safe(dtc, _dtc, &dmatest_channels, node) {
+ list_del(&dtc->node);
+ chan = dtc->chan;
+ dmatest_cleanup_channel(dtc);
+ pr_debug("dmatest: dropped channel %s\n",
+ dma_chan_name(chan));
+ dma_release_channel(chan);
+ }
}
module_exit(dmatest_exit);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff