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dmaengine: dmatest: wrap src & dst data into a struct

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This change wraps the data for the source & destination buffers into a
`struct dmatest_data`. The rename patterns are:
 * src_cnt -> src->cnt
 * dst_cnt -> dst->cnt
 * src_off -> src->off
 * dst_off -> dst->off
 * thread->srcs -> src->aligned
 * thread->usrcs -> src->raw
 * thread->dsts -> dst->aligned
 * thread->udsts -> dst->raw

The intent is to make a function that moves duplicate parts of the code
into common alloc & free functions, which will unclutter the
`dmatest_func()` function.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Alexandru Ardelean 2019-02-12 17:11:37 +02:00 committed by Vinod Koul
parent 528314b503
commit 361deb7243
1 changed files with 101 additions and 94 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

195
drivers/dma/dmatest.c
View File

@ -200,15 +200,20 @@ struct dmatest_done {
wait_queue_head_t *wait;
};
struct dmatest_data {
u8 **raw;
u8 **aligned;
unsigned int cnt;
unsigned int off;
};
struct dmatest_thread {
struct list_head node;
struct dmatest_info *info;
struct task_struct *task;
struct dma_chan *chan;
u8 **srcs;
u8 **usrcs;
u8 **dsts;
u8 **udsts;
struct dmatest_data src;
struct dmatest_data dst;
enum dma_transaction_type type;
wait_queue_head_t done_wait;
struct dmatest_done test_done;
@ -511,8 +516,8 @@ static int dmatest_func(void *data)
enum dma_ctrl_flags flags;
u8 *pq_coefs = NULL;
int ret;
int src_cnt;
int dst_cnt;
struct dmatest_data *src;
struct dmatest_data *dst;
int i;
ktime_t ktime, start, diff;
ktime_t filltime = 0;
@ -535,25 +540,27 @@ static int dmatest_func(void *data)
params = &info->params;
chan = thread->chan;
dev = chan->device;
src = &thread->src;
dst = &thread->dst;
if (thread->type == DMA_MEMCPY) {
align = params->alignment < 0 ? dev->copy_align :
params->alignment;
src_cnt = dst_cnt = 1;
src->cnt = dst->cnt = 1;
} else if (thread->type == DMA_MEMSET) {
align = params->alignment < 0 ? dev->fill_align :
params->alignment;
src_cnt = dst_cnt = 1;
src->cnt = dst->cnt = 1;
is_memset = true;
} else if (thread->type == DMA_XOR) {
/* force odd to ensure dst = src */
src_cnt = min_odd(params->xor_sources | 1, dev->max_xor);
dst_cnt = 1;
src->cnt = min_odd(params->xor_sources | 1, dev->max_xor);
dst->cnt = 1;
align = params->alignment < 0 ? dev->xor_align :
params->alignment;
} else if (thread->type == DMA_PQ) {
/* force odd to ensure dst = src */
src_cnt = min_odd(params->pq_sources | 1, dma_maxpq(dev, 0));
dst_cnt = 2;
src->cnt = min_odd(params->pq_sources | 1, dma_maxpq(dev, 0));
dst->cnt = 2;
align = params->alignment < 0 ? dev->pq_align :
params->alignment;
@ -561,15 +568,15 @@ static int dmatest_func(void *data)
if (!pq_coefs)
goto err_thread_type;
for (i = 0; i < src_cnt; i++)
for (i = 0; i < src->cnt; i++)
pq_coefs[i] = 1;
} else
goto err_thread_type;
/* Check if buffer count fits into map count variable (u8) */
if ((src_cnt + dst_cnt) >= 255) {
if ((src->cnt + dst->cnt) >= 255) {
pr_err("too many buffers (%d of 255 supported)\n",
src_cnt + dst_cnt);
src->cnt + dst->cnt);
goto err_free_coefs;
}
@ -579,57 +586,57 @@ static int dmatest_func(void *data)
goto err_free_coefs;
}
thread->srcs = kcalloc(src_cnt + 1, sizeof(u8 *), GFP_KERNEL);
if (!thread->srcs)
src->aligned = kcalloc(src->cnt + 1, sizeof(u8 *), GFP_KERNEL);
if (!src->aligned)
goto err_free_coefs;
thread->usrcs = kcalloc(src_cnt + 1, sizeof(u8 *), GFP_KERNEL);
if (!thread->usrcs)
src->raw = kcalloc(src->cnt + 1, sizeof(u8 *), GFP_KERNEL);
if (!src->raw)
goto err_usrcs;
for (i = 0; i < src_cnt; i++) {
thread->usrcs[i] = kmalloc(params->buf_size + align,
for (i = 0; i < src->cnt; i++) {
src->raw[i] = kmalloc(params->buf_size + align,
GFP_KERNEL);
if (!thread->usrcs[i])
if (!src->raw[i])
goto err_srcbuf;
/* align srcs to alignment restriction */
if (align)
thread->srcs[i] = PTR_ALIGN(thread->usrcs[i], align);
src->aligned[i] = PTR_ALIGN(src->raw[i], align);
else
thread->srcs[i] = thread->usrcs[i];
src->aligned[i] = src->raw[i];
}
thread->srcs[i] = NULL;
src->aligned[i] = NULL;
thread->dsts = kcalloc(dst_cnt + 1, sizeof(u8 *), GFP_KERNEL);
if (!thread->dsts)
dst->aligned = kcalloc(dst->cnt + 1, sizeof(u8 *), GFP_KERNEL);
if (!dst->aligned)
goto err_dsts;
thread->udsts = kcalloc(dst_cnt + 1, sizeof(u8 *), GFP_KERNEL);
if (!thread->udsts)
dst->raw = kcalloc(dst->cnt + 1, sizeof(u8 *), GFP_KERNEL);
if (!dst->raw)
goto err_udsts;
for (i = 0; i < dst_cnt; i++) {
thread->udsts[i] = kmalloc(params->buf_size + align,
for (i = 0; i < dst->cnt; i++) {
dst->raw[i] = kmalloc(params->buf_size + align,
GFP_KERNEL);
if (!thread->udsts[i])
if (!dst->raw[i])
goto err_dstbuf;
/* align dsts to alignment restriction */
if (align)
thread->dsts[i] = PTR_ALIGN(thread->udsts[i], align);
dst->aligned[i] = PTR_ALIGN(dst->raw[i], align);
else
thread->dsts[i] = thread->udsts[i];
dst->aligned[i] = dst->raw[i];
}
thread->dsts[i] = NULL;
dst->aligned[i] = NULL;
set_user_nice(current, 10);
srcs = kcalloc(src_cnt, sizeof(dma_addr_t), GFP_KERNEL);
srcs = kcalloc(src->cnt, sizeof(dma_addr_t), GFP_KERNEL);
if (!srcs)
goto err_dstbuf;
dma_pq = kcalloc(dst_cnt, sizeof(dma_addr_t), GFP_KERNEL);
dma_pq = kcalloc(dst->cnt, sizeof(dma_addr_t), GFP_KERNEL);
if (!dma_pq)
goto err_srcs_array;
@ -644,7 +651,7 @@ static int dmatest_func(void *data)
struct dma_async_tx_descriptor *tx = NULL;
struct dmaengine_unmap_data *um;
dma_addr_t *dsts;
unsigned int src_off, dst_off, len;
unsigned int len;
total_tests++;
@ -670,59 +677,59 @@ static int dmatest_func(void *data)
total_len += len;
if (params->norandom) {
src_off = 0;
dst_off = 0;
src->off = 0;
dst->off = 0;
} else {
src_off = dmatest_random() % (params->buf_size - len + 1);
dst_off = dmatest_random() % (params->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;
src->off = (src->off >> align) << align;
dst->off = (dst->off >> align) << align;
}
if (!params->noverify) {
start = ktime_get();
dmatest_init_srcs(thread->srcs, src_off, len,
dmatest_init_srcs(src->aligned, src->off, len,
params->buf_size, is_memset);
dmatest_init_dsts(thread->dsts, dst_off, len,
dmatest_init_dsts(dst->aligned, dst->off, len,
params->buf_size, is_memset);
diff = ktime_sub(ktime_get(), start);
filltime = ktime_add(filltime, diff);
}
um = dmaengine_get_unmap_data(dev->dev, src_cnt + dst_cnt,
um = dmaengine_get_unmap_data(dev->dev, src->cnt + dst->cnt,
GFP_KERNEL);
if (!um) {
failed_tests++;
result("unmap data NULL", total_tests,
src_off, dst_off, len, ret);
src->off, dst->off, len, ret);
continue;
}
um->len = params->buf_size;
for (i = 0; i < src_cnt; i++) {
void *buf = thread->srcs[i];
for (i = 0; i < src->cnt; i++) {
void *buf = src->aligned[i];
struct page *pg = virt_to_page(buf);
unsigned long pg_off = offset_in_page(buf);
um->addr[i] = dma_map_page(dev->dev, pg, pg_off,
um->len, DMA_TO_DEVICE);
srcs[i] = um->addr[i] + src_off;
srcs[i] = um->addr[i] + src->off;
ret = dma_mapping_error(dev->dev, um->addr[i]);
if (ret) {
dmaengine_unmap_put(um);
result("src mapping error", total_tests,
src_off, dst_off, len, ret);
src->off, dst->off, len, ret);
failed_tests++;
continue;
}
um->to_cnt++;
}
/* map with DMA_BIDIRECTIONAL to force writeback/invalidate */
dsts = &um->addr[src_cnt];
for (i = 0; i < dst_cnt; i++) {
void *buf = thread->dsts[i];
dsts = &um->addr[src->cnt];
for (i = 0; i < dst->cnt; i++) {
void *buf = dst->aligned[i];
struct page *pg = virt_to_page(buf);
unsigned long pg_off = offset_in_page(buf);
@ -732,7 +739,7 @@ static int dmatest_func(void *data)
if (ret) {
dmaengine_unmap_put(um);
result("dst mapping error", total_tests,
src_off, dst_off, len, ret);
src->off, dst->off, len, ret);
failed_tests++;
continue;
}
@ -741,30 +748,30 @@ static int dmatest_func(void *data)
if (thread->type == DMA_MEMCPY)
tx = dev->device_prep_dma_memcpy(chan,
dsts[0] + dst_off,
dsts[0] + dst->off,
srcs[0], len, flags);
else if (thread->type == DMA_MEMSET)
tx = dev->device_prep_dma_memset(chan,
dsts[0] + dst_off,
*(thread->srcs[0] + src_off),
dsts[0] + dst->off,
*(src->aligned[0] + src->off),
len, flags);
else if (thread->type == DMA_XOR)
tx = dev->device_prep_dma_xor(chan,
dsts[0] + dst_off,
srcs, src_cnt,
dsts[0] + dst->off,
srcs, src->cnt,
len, flags);
else if (thread->type == DMA_PQ) {
for (i = 0; i < dst_cnt; i++)
dma_pq[i] = dsts[i] + dst_off;
for (i = 0; i < dst->cnt; i++)
dma_pq[i] = dsts[i] + dst->off;
tx = dev->device_prep_dma_pq(chan, dma_pq, srcs,
src_cnt, pq_coefs,
src->cnt, pq_coefs,
len, flags);
}
if (!tx) {
dmaengine_unmap_put(um);
result("prep error", total_tests, src_off,
dst_off, len, ret);
result("prep error", total_tests, src->off,
dst->off, len, ret);
msleep(100);
failed_tests++;
continue;
@ -777,8 +784,8 @@ static int dmatest_func(void *data)
if (dma_submit_error(cookie)) {
dmaengine_unmap_put(um);
result("submit error", total_tests, src_off,
dst_off, len, ret);
result("submit error", total_tests, src->off,
dst->off, len, ret);
msleep(100);
failed_tests++;
continue;
@ -793,58 +800,58 @@ static int dmatest_func(void *data)
dmaengine_unmap_put(um);
if (!done->done) {
result("test timed out", total_tests, src_off, dst_off,
result("test timed out", total_tests, src->off, dst->off,
len, 0);
failed_tests++;
continue;
} else if (status != DMA_COMPLETE) {
result(status == DMA_ERROR ?
"completion error status" :
"completion busy status", total_tests, src_off,
dst_off, len, ret);
"completion busy status", total_tests, src->off,
dst->off, len, ret);
failed_tests++;
continue;
}
if (params->noverify) {
verbose_result("test passed", total_tests, src_off,
dst_off, len, 0);
verbose_result("test passed", total_tests, src->off,
dst->off, len, 0);
continue;
}
start = ktime_get();
pr_debug("%s: verifying source buffer...\n", current->comm);
error_count = dmatest_verify(thread->srcs, 0, src_off,
error_count = dmatest_verify(src->aligned, 0, src->off,
0, PATTERN_SRC, true, is_memset);
error_count += dmatest_verify(thread->srcs, src_off,
src_off + len, src_off,
error_count += dmatest_verify(src->aligned, src->off,
src->off + len, src->off,
PATTERN_SRC | PATTERN_COPY, true, is_memset);
error_count += dmatest_verify(thread->srcs, src_off + len,
params->buf_size, src_off + len,
error_count += dmatest_verify(src->aligned, src->off + len,
params->buf_size, src->off + len,
PATTERN_SRC, true, is_memset);
pr_debug("%s: verifying dest buffer...\n", current->comm);
error_count += dmatest_verify(thread->dsts, 0, dst_off,
error_count += dmatest_verify(dst->aligned, 0, dst->off,
0, PATTERN_DST, false, is_memset);
error_count += dmatest_verify(thread->dsts, dst_off,
dst_off + len, src_off,
error_count += dmatest_verify(dst->aligned, dst->off,
dst->off + len, src->off,
PATTERN_SRC | PATTERN_COPY, false, is_memset);
error_count += dmatest_verify(thread->dsts, dst_off + len,
params->buf_size, dst_off + len,
error_count += dmatest_verify(dst->aligned, dst->off + len,
params->buf_size, dst->off + len,
PATTERN_DST, false, is_memset);
diff = ktime_sub(ktime_get(), start);
comparetime = ktime_add(comparetime, diff);
if (error_count) {
result("data error", total_tests, src_off, dst_off,
result("data error", total_tests, src->off, dst->off,
len, error_count);
failed_tests++;
} else {
verbose_result("test passed", total_tests, src_off,
dst_off, len, 0);
verbose_result("test passed", total_tests, src->off,
dst->off, len, 0);
}
}
ktime = ktime_sub(ktime_get(), ktime);
@ -857,18 +864,18 @@ static int dmatest_func(void *data)
err_srcs_array:
kfree(srcs);
err_dstbuf:
for (i = 0; thread->udsts[i]; i++)
kfree(thread->udsts[i]);
kfree(thread->udsts);
for (i = 0; dst->raw[i]; i++)
kfree(dst->raw[i]);
kfree(dst->raw);
err_udsts:
kfree(thread->dsts);
kfree(dst->aligned);
err_dsts:
err_srcbuf:
for (i = 0; thread->usrcs[i]; i++)
kfree(thread->usrcs[i]);
kfree(thread->usrcs);
for (i = 0; src->raw[i]; i++)
kfree(src->raw[i]);
kfree(src->raw);
err_usrcs:
kfree(thread->srcs);
kfree(src->aligned);
err_free_coefs:
kfree(pq_coefs);
err_thread_type: