diff options
| -rw-r--r-- | Documentation/dmatest.txt | 6 | ||||
| -rw-r--r-- | drivers/dma/dmatest.c | 180 |
2 files changed, 53 insertions, 133 deletions
diff --git a/Documentation/dmatest.txt b/Documentation/dmatest.txt index a2b5663..8b7a5c8 100644 --- a/Documentation/dmatest.txt +++ b/Documentation/dmatest.txt @@ -76,7 +76,5 @@ The message format is unified across the different types of errors. A number in the parens represents additional information, e.g. error code, error counter, or status. -Comparison between buffers is stored to the dedicated structure. - -Note that the verify result is now accessible only via file 'results' in the -debugfs. +Note that the buffer comparison is done in the old way, i.e. data is not +collected and just printed out. diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c index 5791091..dcb38d8 100644 --- a/drivers/dma/dmatest.c +++ b/drivers/dma/dmatest.c @@ -98,20 +98,6 @@ enum dmatest_error_type { DMATEST_ET_DMA_ERROR, DMATEST_ET_DMA_IN_PROGRESS, DMATEST_ET_VERIFY, - DMATEST_ET_VERIFY_BUF, -}; - -struct dmatest_verify_buffer { - unsigned int index; - u8 expected; - u8 actual; -}; - -struct dmatest_verify_result { - unsigned int error_count; - struct dmatest_verify_buffer data[MAX_ERROR_COUNT]; - u8 pattern; - bool is_srcbuf; }; struct dmatest_thread_result { @@ -122,11 +108,10 @@ struct dmatest_thread_result { unsigned int len; enum dmatest_error_type type; union { - unsigned long data; - dma_cookie_t cookie; - enum dma_status status; - int error; - struct dmatest_verify_result *vr; + unsigned long data; + dma_cookie_t cookie; + enum dma_status status; + int error; }; }; @@ -262,9 +247,31 @@ static void dmatest_init_dsts(u8 **bufs, unsigned int start, unsigned int len, } } -static unsigned int dmatest_verify(struct dmatest_verify_result *vr, u8 **bufs, - unsigned int start, unsigned int end, unsigned int counter, - u8 pattern, bool is_srcbuf) +static void dmatest_mismatch(u8 actual, u8 pattern, unsigned int index, + unsigned int counter, bool is_srcbuf) +{ + u8 diff = actual ^ pattern; + u8 expected = pattern | (~counter & PATTERN_COUNT_MASK); + const char *thread_name = current->comm; + + if (is_srcbuf) + pr_warn("%s: srcbuf[0x%x] overwritten! Expected %02x, got %02x\n", + thread_name, index, expected, actual); + else if ((pattern & PATTERN_COPY) + && (diff & (PATTERN_COPY | PATTERN_OVERWRITE))) + pr_warn("%s: dstbuf[0x%x] not copied! Expected %02x, got %02x\n", + thread_name, index, expected, actual); + else if (diff & PATTERN_SRC) + pr_warn("%s: dstbuf[0x%x] was copied! Expected %02x, got %02x\n", + thread_name, index, expected, actual); + else + pr_warn("%s: dstbuf[0x%x] mismatch! Expected %02x, got %02x\n", + thread_name, index, expected, actual); +} + +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; @@ -272,7 +279,6 @@ static unsigned int dmatest_verify(struct dmatest_verify_result *vr, u8 **bufs, u8 expected; u8 *buf; unsigned int counter_orig = counter; - struct dmatest_verify_buffer *vb; for (; (buf = *bufs); bufs++) { counter = counter_orig; @@ -280,12 +286,9 @@ static unsigned int dmatest_verify(struct dmatest_verify_result *vr, u8 **bufs, actual = buf[i]; expected = pattern | (~counter & PATTERN_COUNT_MASK); if (actual != expected) { - if (error_count < MAX_ERROR_COUNT && vr) { - vb = &vr->data[error_count]; - vb->index = i; - vb->expected = expected; - vb->actual = actual; - } + if (error_count < MAX_ERROR_COUNT) + dmatest_mismatch(actual, pattern, i, + counter, is_srcbuf); error_count++; } counter++; @@ -293,7 +296,7 @@ static unsigned int dmatest_verify(struct dmatest_verify_result *vr, u8 **bufs, } if (error_count > MAX_ERROR_COUNT) - pr_warning("%s: %u errors suppressed\n", + pr_warn("%s: %u errors suppressed\n", current->comm, error_count - MAX_ERROR_COUNT); return error_count; @@ -334,30 +337,6 @@ static unsigned int min_odd(unsigned int x, unsigned int y) return val % 2 ? val : val - 1; } -static char *verify_result_get_one(struct dmatest_verify_result *vr, - unsigned int i) -{ - struct dmatest_verify_buffer *vb = &vr->data[i]; - u8 diff = vb->actual ^ vr->pattern; - static char buf[512]; - char *msg; - - if (vr->is_srcbuf) - msg = "srcbuf overwritten!"; - else if ((vr->pattern & PATTERN_COPY) - && (diff & (PATTERN_COPY | PATTERN_OVERWRITE))) - msg = "dstbuf not copied!"; - else if (diff & PATTERN_SRC) - msg = "dstbuf was copied!"; - else - msg = "dstbuf mismatch!"; - - snprintf(buf, sizeof(buf) - 1, "%s [0x%x] Expected %02x, got %02x", msg, - vb->index, vb->expected, vb->actual); - - return buf; -} - static char *thread_result_get(const char *name, struct dmatest_thread_result *tr) { @@ -373,7 +352,6 @@ static char *thread_result_get(const char *name, [DMATEST_ET_DMA_IN_PROGRESS] = "got completion callback (DMA_IN_PROGRESS)", [DMATEST_ET_VERIFY] = "errors", - [DMATEST_ET_VERIFY_BUF] = "verify errors", }; static char buf[512]; @@ -415,51 +393,6 @@ static int thread_result_add(struct dmatest_info *info, return 0; } -static unsigned int verify_result_add(struct dmatest_info *info, - struct dmatest_result *r, unsigned int n, - unsigned int src_off, unsigned int dst_off, unsigned int len, - u8 **bufs, int whence, unsigned int counter, u8 pattern, - bool is_srcbuf) -{ - struct dmatest_verify_result *vr; - unsigned int error_count; - unsigned int buf_off = is_srcbuf ? src_off : dst_off; - unsigned int start, end; - - if (whence < 0) { - start = 0; - end = buf_off; - } else if (whence > 0) { - start = buf_off + len; - end = info->params.buf_size; - } else { - start = buf_off; - end = buf_off + len; - } - - vr = kmalloc(sizeof(*vr), GFP_KERNEL); - if (!vr) { - pr_warn("dmatest: No memory to store verify result\n"); - return dmatest_verify(NULL, bufs, start, end, counter, pattern, - is_srcbuf); - } - - vr->pattern = pattern; - vr->is_srcbuf = is_srcbuf; - - error_count = dmatest_verify(vr, bufs, start, end, counter, pattern, - is_srcbuf); - if (error_count) { - vr->error_count = error_count; - thread_result_add(info, r, DMATEST_ET_VERIFY_BUF, n, src_off, - dst_off, len, (unsigned long)vr); - return error_count; - } - - kfree(vr); - return 0; -} - static void result_free(struct dmatest_info *info, const char *name) { struct dmatest_result *r, *_r; @@ -472,8 +405,6 @@ static void result_free(struct dmatest_info *info, const char *name) continue; list_for_each_entry_safe(tr, _tr, &r->results, node) { - if (tr->type == DMATEST_ET_VERIFY_BUF) - kfree(tr->vr); list_del(&tr->node); kfree(tr); } @@ -755,26 +686,25 @@ static int dmatest_func(void *data) error_count = 0; pr_debug("%s: verifying source buffer...\n", thread_name); - error_count += verify_result_add(info, result, total_tests, - src_off, dst_off, len, thread->srcs, -1, + error_count += dmatest_verify(thread->srcs, 0, src_off, 0, PATTERN_SRC, true); - error_count += verify_result_add(info, result, total_tests, - src_off, dst_off, len, thread->srcs, 0, - src_off, PATTERN_SRC | PATTERN_COPY, true); - error_count += verify_result_add(info, result, total_tests, - src_off, dst_off, len, thread->srcs, 1, - src_off + len, PATTERN_SRC, true); - - pr_debug("%s: verifying dest buffer...\n", thread_name); - error_count += verify_result_add(info, result, total_tests, - src_off, dst_off, len, thread->dsts, -1, + error_count += dmatest_verify(thread->srcs, src_off, + src_off + len, src_off, + PATTERN_SRC | PATTERN_COPY, true); + error_count += dmatest_verify(thread->srcs, src_off + len, + params->buf_size, src_off + len, + PATTERN_SRC, true); + + pr_debug("%s: verifying dest buffer...\n", + thread->task->comm); + error_count += dmatest_verify(thread->dsts, 0, dst_off, 0, PATTERN_DST, false); - error_count += verify_result_add(info, result, total_tests, - src_off, dst_off, len, thread->dsts, 0, - src_off, PATTERN_SRC | PATTERN_COPY, false); - error_count += verify_result_add(info, result, total_tests, - src_off, dst_off, len, thread->dsts, 1, - dst_off + len, PATTERN_DST, false); + error_count += dmatest_verify(thread->dsts, dst_off, + dst_off + len, src_off, + PATTERN_SRC | PATTERN_COPY, false); + error_count += dmatest_verify(thread->dsts, dst_off + len, + params->buf_size, dst_off + len, + PATTERN_DST, false); if (error_count) { thread_result_add(info, result, DMATEST_ET_VERIFY, @@ -1099,20 +1029,12 @@ static int dtf_results_show(struct seq_file *sf, void *data) struct dmatest_info *info = sf->private; struct dmatest_result *result; struct dmatest_thread_result *tr; - unsigned int i; mutex_lock(&info->results_lock); list_for_each_entry(result, &info->results, node) { - list_for_each_entry(tr, &result->results, node) { + list_for_each_entry(tr, &result->results, node) seq_printf(sf, "%s\n", thread_result_get(result->name, tr)); - if (tr->type == DMATEST_ET_VERIFY_BUF) { - for (i = 0; i < tr->vr->error_count; i++) { - seq_printf(sf, "\t%s\n", - verify_result_get_one(tr->vr, i)); - } - } - } } mutex_unlock(&info->results_lock); |
