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-rw-r--r--drivers/dma/dmatest.c110
1 files changed, 59 insertions, 51 deletions
diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index a07ef3d6b3ec..34ff53290b03 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -52,15 +52,10 @@ 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;
module_param(dmatest, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(dmatest,
- "dmatest 0-memcpy 1-slave_sg (default: 0)");
+ "dmatest 0-memcpy 1-memset (default: 0)");
static unsigned int xor_sources = 3;
module_param(xor_sources, uint, S_IRUGO | S_IWUSR);
@@ -158,6 +153,7 @@ MODULE_PARM_DESC(run, "Run the test (default: false)");
#define PATTERN_COPY 0x40
#define PATTERN_OVERWRITE 0x20
#define PATTERN_COUNT_MASK 0x1f
+#define PATTERN_MEMSET_IDX 0x01
struct dmatest_thread {
struct list_head node;
@@ -239,46 +235,62 @@ static unsigned long dmatest_random(void)
return buf;
}
+static inline u8 gen_inv_idx(u8 index, bool is_memset)
+{
+ u8 val = is_memset ? PATTERN_MEMSET_IDX : index;
+
+ return ~val & PATTERN_COUNT_MASK;
+}
+
+static inline u8 gen_src_value(u8 index, bool is_memset)
+{
+ return PATTERN_SRC | gen_inv_idx(index, is_memset);
+}
+
+static inline u8 gen_dst_value(u8 index, bool is_memset)
+{
+ return PATTERN_DST | gen_inv_idx(index, is_memset);
+}
+
static void dmatest_init_srcs(u8 **bufs, unsigned int start, unsigned int len,
- unsigned int buf_size)
+ unsigned int buf_size, bool is_memset)
{
unsigned int i;
u8 *buf;
for (; (buf = *bufs); bufs++) {
for (i = 0; i < start; i++)
- buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK);
+ buf[i] = gen_src_value(i, is_memset);
for ( ; i < start + len; i++)
- buf[i] = PATTERN_SRC | PATTERN_COPY
- | (~i & PATTERN_COUNT_MASK);
+ buf[i] = gen_src_value(i, is_memset) | PATTERN_COPY;
for ( ; i < buf_size; i++)
- buf[i] = PATTERN_SRC | (~i & PATTERN_COUNT_MASK);
+ buf[i] = gen_src_value(i, is_memset);
buf++;
}
}
static void dmatest_init_dsts(u8 **bufs, unsigned int start, unsigned int len,
- unsigned int buf_size)
+ unsigned int buf_size, bool is_memset)
{
unsigned int i;
u8 *buf;
for (; (buf = *bufs); bufs++) {
for (i = 0; i < start; i++)
- buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK);
+ buf[i] = gen_dst_value(i, is_memset);
for ( ; i < start + len; i++)
- buf[i] = PATTERN_DST | PATTERN_OVERWRITE
- | (~i & PATTERN_COUNT_MASK);
+ buf[i] = gen_dst_value(i, is_memset) |
+ PATTERN_OVERWRITE;
for ( ; i < buf_size; i++)
- buf[i] = PATTERN_DST | (~i & PATTERN_COUNT_MASK);
+ buf[i] = gen_dst_value(i, is_memset);
}
}
static void dmatest_mismatch(u8 actual, u8 pattern, unsigned int index,
- unsigned int counter, bool is_srcbuf)
+ unsigned int counter, bool is_srcbuf, bool is_memset)
{
u8 diff = actual ^ pattern;
- u8 expected = pattern | (~counter & PATTERN_COUNT_MASK);
+ u8 expected = pattern | gen_inv_idx(counter, is_memset);
const char *thread_name = current->comm;
if (is_srcbuf)
@@ -298,7 +310,7 @@ static void dmatest_mismatch(u8 actual, u8 pattern, unsigned int index,
static unsigned int dmatest_verify(u8 **bufs, unsigned int start,
unsigned int end, unsigned int counter, u8 pattern,
- bool is_srcbuf)
+ bool is_srcbuf, bool is_memset)
{
unsigned int i;
unsigned int error_count = 0;
@@ -311,11 +323,12 @@ static unsigned int dmatest_verify(u8 **bufs, unsigned int start,
counter = counter_orig;
for (i = start; i < end; i++) {
actual = buf[i];
- expected = pattern | (~counter & PATTERN_COUNT_MASK);
+ expected = pattern | gen_inv_idx(counter, is_memset);
if (actual != expected) {
if (error_count < MAX_ERROR_COUNT)
dmatest_mismatch(actual, pattern, i,
- counter, is_srcbuf);
+ counter, is_srcbuf,
+ is_memset);
error_count++;
}
counter++;
@@ -435,6 +448,7 @@ static int dmatest_func(void *data)
s64 runtime = 0;
unsigned long long total_len = 0;
u8 align = 0;
+ bool is_memset = false;
set_freezable();
@@ -448,9 +462,10 @@ static int dmatest_func(void *data)
if (thread->type == DMA_MEMCPY) {
align = dev->copy_align;
src_cnt = dst_cnt = 1;
- } else if (thread->type == DMA_SG) {
- align = dev->copy_align;
- src_cnt = dst_cnt = sg_buffers;
+ } else if (thread->type == DMA_MEMSET) {
+ align = dev->fill_align;
+ 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);
@@ -530,8 +545,6 @@ static int dmatest_func(void *data)
dma_addr_t srcs[src_cnt];
dma_addr_t *dsts;
unsigned int src_off, dst_off, len;
- struct scatterlist tx_sg[src_cnt];
- struct scatterlist rx_sg[src_cnt];
total_tests++;
@@ -571,9 +584,9 @@ static int dmatest_func(void *data)
dst_off = (dst_off >> align) << align;
dmatest_init_srcs(thread->srcs, src_off, len,
- params->buf_size);
+ params->buf_size, is_memset);
dmatest_init_dsts(thread->dsts, dst_off, len,
- params->buf_size);
+ params->buf_size, is_memset);
diff = ktime_sub(ktime_get(), start);
filltime = ktime_add(filltime, diff);
@@ -627,22 +640,15 @@ 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_MEMSET)
+ tx = dev->device_prep_dma_memset(chan,
+ dsts[0] + dst_off,
+ *(thread->srcs[0] + src_off),
+ len, flags);
else if (thread->type == DMA_XOR)
tx = dev->device_prep_dma_xor(chan,
dsts[0] + dst_off,
@@ -722,23 +728,25 @@ static int dmatest_func(void *data)
start = ktime_get();
pr_debug("%s: verifying source buffer...\n", current->comm);
error_count = dmatest_verify(thread->srcs, 0, src_off,
- 0, PATTERN_SRC, true);
+ 0, PATTERN_SRC, true, is_memset);
error_count += dmatest_verify(thread->srcs, src_off,
src_off + len, src_off,
- PATTERN_SRC | PATTERN_COPY, true);
+ PATTERN_SRC | PATTERN_COPY, true, is_memset);
error_count += dmatest_verify(thread->srcs, src_off + len,
params->buf_size, src_off + len,
- PATTERN_SRC, true);
+ PATTERN_SRC, true, is_memset);
pr_debug("%s: verifying dest buffer...\n", current->comm);
error_count += dmatest_verify(thread->dsts, 0, dst_off,
- 0, PATTERN_DST, false);
+ 0, PATTERN_DST, false, is_memset);
+
error_count += dmatest_verify(thread->dsts, dst_off,
dst_off + len, src_off,
- PATTERN_SRC | PATTERN_COPY, false);
+ PATTERN_SRC | PATTERN_COPY, false, is_memset);
+
error_count += dmatest_verify(thread->dsts, dst_off + len,
params->buf_size, dst_off + len,
- PATTERN_DST, false);
+ PATTERN_DST, false, is_memset);
diff = ktime_sub(ktime_get(), start);
comparetime = ktime_add(comparetime, diff);
@@ -821,8 +829,8 @@ 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_MEMSET)
+ op = "set";
else if (type == DMA_XOR)
op = "xor";
else if (type == DMA_PQ)
@@ -883,9 +891,9 @@ static int dmatest_add_channel(struct dmatest_info *info,
}
}
- if (dma_has_cap(DMA_SG, dma_dev->cap_mask)) {
+ if (dma_has_cap(DMA_MEMSET, dma_dev->cap_mask)) {
if (dmatest == 1) {
- cnt = dmatest_add_threads(info, dtc, DMA_SG);
+ cnt = dmatest_add_threads(info, dtc, DMA_MEMSET);
thread_count += cnt > 0 ? cnt : 0;
}
}
@@ -961,8 +969,8 @@ static void run_threaded_test(struct dmatest_info *info)
params->noverify = noverify;
request_channels(info, DMA_MEMCPY);
+ request_channels(info, DMA_MEMSET);
request_channels(info, DMA_XOR);
- request_channels(info, DMA_SG);
request_channels(info, DMA_PQ);
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.