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Message-ID: <CABdmKX2r=9+dK71qrp4iU8Dkmt=CF1oWWZFmi9Ny+0iphBoynw@mail.gmail.com>
Date: Thu, 29 Feb 2024 09:37:09 -0800
From: "T.J. Mercier" <tjmercier@...gle.com>
To: Muhammad Usama Anjum <usama.anjum@...labora.com>
Cc: Shuah Khan <shuah@...nel.org>, kernel@...labora.com, linux-kselftest@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/2] selftests/dmabuf-heap: conform test to TAP format output
On Thu, Feb 29, 2024 at 1:21 AM Muhammad Usama Anjum
<usama.anjum@...labora.com> wrote:
>
> Conform the layout, informational and status messages to TAP. No
> functional change is intended other than the layout of output messages.
>
> Signed-off-by: Muhammad Usama Anjum <usama.anjum@...labora.com>
> ---
> Changes since v2:
> - Minor improvements in test_alloc_zeroed() results
>
> Changes since v1:
> - Update some more error handling code
> ---
> .../selftests/dmabuf-heaps/dmabuf-heap.c | 234 +++++++-----------
> 1 file changed, 88 insertions(+), 146 deletions(-)
>
> diff --git a/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c b/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c
> index 890a8236a8ba7..bdc157ba542fd 100644
> --- a/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c
> +++ b/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c
> @@ -15,6 +15,7 @@
> #include <linux/dma-buf.h>
> #include <linux/dma-heap.h>
> #include <drm/drm.h>
> +#include "../kselftest.h"
>
> #define DEVPATH "/dev/dma_heap"
>
> @@ -90,14 +91,13 @@ static int dmabuf_heap_open(char *name)
> char buf[256];
>
> ret = snprintf(buf, 256, "%s/%s", DEVPATH, name);
> - if (ret < 0) {
> - printf("snprintf failed!\n");
> - return ret;
> - }
> + if (ret < 0)
> + ksft_exit_fail_msg("snprintf failed!\n");
>
> fd = open(buf, O_RDWR);
> if (fd < 0)
> - printf("open %s failed!\n", buf);
> + ksft_exit_fail_msg("open %s failed: %s\n", buf, strerror(errno));
> +
> return fd;
> }
>
> @@ -140,7 +140,7 @@ static int dmabuf_sync(int fd, int start_stop)
>
> #define ONE_MEG (1024 * 1024)
>
> -static int test_alloc_and_import(char *heap_name)
> +static void test_alloc_and_import(char *heap_name)
> {
> int heap_fd = -1, dmabuf_fd = -1, importer_fd = -1;
> uint32_t handle = 0;
> @@ -148,16 +148,12 @@ static int test_alloc_and_import(char *heap_name)
> int ret;
>
> heap_fd = dmabuf_heap_open(heap_name);
> - if (heap_fd < 0)
> - return -1;
>
> - printf(" Testing allocation and importing: ");
> + ksft_print_msg("Testing allocation and importing:\n");
> ret = dmabuf_heap_alloc(heap_fd, ONE_MEG, 0, &dmabuf_fd);
> - if (ret) {
> - printf("FAIL (Allocation Failed!)\n");
> - ret = -1;
> - goto out;
> - }
> + if (ret)
> + ksft_exit_fail_msg("FAIL (Allocation Failed!)\n");
> +
> /* mmap and write a simple pattern */
> p = mmap(NULL,
> ONE_MEG,
> @@ -165,11 +161,8 @@ static int test_alloc_and_import(char *heap_name)
> MAP_SHARED,
> dmabuf_fd,
> 0);
> - if (p == MAP_FAILED) {
> - printf("FAIL (mmap() failed)\n");
> - ret = -1;
> - goto out;
> - }
> + if (p == MAP_FAILED)
> + ksft_exit_fail_msg("FAIL (mmap() failed)\n");
>
> dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_START);
> memset(p, 1, ONE_MEG / 2);
> @@ -179,70 +172,58 @@ static int test_alloc_and_import(char *heap_name)
> importer_fd = open_vgem();
> if (importer_fd < 0) {
> ret = importer_fd;
> - printf("(Could not open vgem - skipping): ");
> + ksft_test_result_skip("Could not open vgem\n");
> } else {
> ret = import_vgem_fd(importer_fd, dmabuf_fd, &handle);
> - if (ret < 0) {
> - printf("FAIL (Failed to import buffer)\n");
> - goto out;
> - }
> + ksft_test_result(ret >= 0, "Import buffer\n");
> }
>
> ret = dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_START);
> if (ret < 0) {
> - printf("FAIL (DMA_BUF_SYNC_START failed!)\n");
> + ksft_print_msg("FAIL (DMA_BUF_SYNC_START failed!)\n");
> goto out;
> }
>
> memset(p, 0xff, ONE_MEG);
> ret = dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_END);
> if (ret < 0) {
> - printf("FAIL (DMA_BUF_SYNC_END failed!)\n");
> + ksft_print_msg("FAIL (DMA_BUF_SYNC_END failed!)\n");
> goto out;
> }
>
> close_handle(importer_fd, handle);
> - ret = 0;
> - printf(" OK\n");
> + ksft_test_result_pass("%s\n", __func__);
> + return;
> out:
> - if (p)
> - munmap(p, ONE_MEG);
> - if (importer_fd >= 0)
> - close(importer_fd);
> - if (dmabuf_fd >= 0)
> - close(dmabuf_fd);
> - if (heap_fd >= 0)
> - close(heap_fd);
> + munmap(p, ONE_MEG);
> + close(importer_fd);
> + close(dmabuf_fd);
> + close(heap_fd);
>
> - return ret;
> + ksft_test_result_fail("%s\n", __func__);
> }
>
> -static int test_alloc_zeroed(char *heap_name, size_t size)
> +static void test_alloc_zeroed(char *heap_name, size_t size)
> {
> int heap_fd = -1, dmabuf_fd[32];
> int i, j, ret;
> void *p = NULL;
> char *c;
>
> - printf(" Testing alloced %ldk buffers are zeroed: ", size / 1024);
> + ksft_print_msg("Testing alloced %ldk buffers are zeroed:\n", size / 1024);
> heap_fd = dmabuf_heap_open(heap_name);
> - if (heap_fd < 0)
> - return -1;
>
> /* Allocate and fill a bunch of buffers */
> for (i = 0; i < 32; i++) {
> ret = dmabuf_heap_alloc(heap_fd, size, 0, &dmabuf_fd[i]);
> - if (ret < 0) {
> - printf("FAIL (Allocation (%i) failed)\n", i);
> - goto out;
> - }
> + if (ret)
> + ksft_exit_fail_msg("FAIL (Allocation (%i) failed)\n", i);
> +
> /* mmap and fill with simple pattern */
> p = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, dmabuf_fd[i], 0);
> - if (p == MAP_FAILED) {
> - printf("FAIL (mmap() failed!)\n");
> - ret = -1;
> - goto out;
> - }
> + if (p == MAP_FAILED)
> + ksft_exit_fail_msg("FAIL (mmap() failed!)\n");
> +
> dmabuf_sync(dmabuf_fd[i], DMA_BUF_SYNC_START);
> memset(p, 0xff, size);
> dmabuf_sync(dmabuf_fd[i], DMA_BUF_SYNC_END);
> @@ -251,48 +232,38 @@ static int test_alloc_zeroed(char *heap_name, size_t size)
> /* close them all */
> for (i = 0; i < 32; i++)
> close(dmabuf_fd[i]);
> + ksft_test_result_pass("Allocate and fill a bunch of buffers\n");
>
> /* Allocate and validate all buffers are zeroed */
> for (i = 0; i < 32; i++) {
> ret = dmabuf_heap_alloc(heap_fd, size, 0, &dmabuf_fd[i]);
> - if (ret < 0) {
> - printf("FAIL (Allocation (%i) failed)\n", i);
> - goto out;
> - }
> + if (ret < 0)
> + ksft_exit_fail_msg("FAIL (Allocation (%i) failed)\n", i);
>
> /* mmap and validate everything is zero */
> p = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, dmabuf_fd[i], 0);
> - if (p == MAP_FAILED) {
> - printf("FAIL (mmap() failed!)\n");
> - ret = -1;
> - goto out;
> - }
> + if (p == MAP_FAILED)
> + ksft_exit_fail_msg("FAIL (mmap() failed!)\n");
> +
> dmabuf_sync(dmabuf_fd[i], DMA_BUF_SYNC_START);
> c = (char *)p;
> for (j = 0; j < size; j++) {
> if (c[j] != 0) {
> - printf("FAIL (Allocated buffer not zeroed @ %i)\n", j);
> + ksft_print_msg("FAIL (Allocated buffer not zeroed @ %i)\n", j);
> break;
> }
> }
> dmabuf_sync(dmabuf_fd[i], DMA_BUF_SYNC_END);
> munmap(p, size);
> }
> +
> + ksft_test_result(i == 32, "Allocate and validate all buffers are zeroed\n");
This part is still incorrect since we will always get i == 32 as long
as the buffer can be allocated and mapped, regardless of the content
of the buffer which this test is supposed to be checking.
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