lkml.org 
[lkml]   [2019]   [Mar]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [RFC][PATCH 5/5 v2] kselftests: Add dma-heap test
Le mar. 5 mars 2019 à 21:54, John Stultz <john.stultz@linaro.org> a écrit :
>
> Add very trivial allocation test for dma-heaps.
>
> TODO: Need to actually do some validation on
> the returned dma-buf.
>
> Cc: Laura Abbott <labbott@redhat.com>
> Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
> Cc: Greg KH <gregkh@linuxfoundation.org>
> Cc: Sumit Semwal <sumit.semwal@linaro.org>
> Cc: Liam Mark <lmark@codeaurora.org>
> Cc: Brian Starkey <Brian.Starkey@arm.com>
> Cc: Andrew F. Davis <afd@ti.com>
> Cc: Chenbo Feng <fengc@google.com>
> Cc: Alistair Strachan <astrachan@google.com>
> Cc: dri-devel@lists.freedesktop.org
> Signed-off-by: John Stultz <john.stultz@linaro.org>
> ---
> v2: Switched to use reworked dma-heap apis
> ---
> tools/testing/selftests/dmabuf-heaps/Makefile | 11 +++
> tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c | 96 ++++++++++++++++++++++
> 2 files changed, 107 insertions(+)
> create mode 100644 tools/testing/selftests/dmabuf-heaps/Makefile
> create mode 100644 tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c
>
> diff --git a/tools/testing/selftests/dmabuf-heaps/Makefile b/tools/testing/selftests/dmabuf-heaps/Makefile
> new file mode 100644
> index 0000000..c414ad3
> --- /dev/null
> +++ b/tools/testing/selftests/dmabuf-heaps/Makefile
> @@ -0,0 +1,11 @@
> +# SPDX-License-Identifier: GPL-2.0
> +CFLAGS += -static -O3 -Wl,-no-as-needed -Wall
> +#LDLIBS += -lrt -lpthread -lm
> +
> +# these are all "safe" tests that don't modify
> +# system time or require escalated privileges
> +TEST_GEN_PROGS = dmabuf-heap
> +
> +
> +include ../lib.mk
> +
> diff --git a/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c b/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c
> new file mode 100644
> index 0000000..06837a4
> --- /dev/null
> +++ b/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c
> @@ -0,0 +1,96 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +#include <dirent.h>
> +#include <errno.h>
> +#include <fcntl.h>
> +#include <stdio.h>
> +#include <string.h>
> +#include <unistd.h>
> +#include <sys/ioctl.h>
> +#include <sys/mman.h>
> +#include <sys/types.h>
> +
> +#include "../../../../include/uapi/linux/dma-heap.h"
> +
> +#define DEVPATH "/dev/dma_heap"
> +
> +int dmabuf_heap_open(char *name)
> +{
> + int ret, fd;
> + char buf[256];
> +
> + ret = sprintf(buf, "%s/%s", DEVPATH, name);
> + if (ret < 0) {
> + printf("sprintf failed!\n");
> + return ret;
> + }
> +
> + fd = open(buf, O_RDWR);
> + if (fd < 0)
> + printf("open %s failed!\n", buf);
> + return fd;
> +}
> +
> +int dmabuf_heap_alloc(int fd, size_t len, unsigned int flags, int *dmabuf_fd)
> +{
> + struct dma_heap_allocation_data data = {
> + .len = len,
> + .flags = flags,
> + };
> + int ret;
> +
> + if (dmabuf_fd == NULL)
> + return -EINVAL;
> +
> + ret = ioctl(fd, DMA_HEAP_IOC_ALLOC, &data);
> + if (ret < 0)
> + return ret;
> + *dmabuf_fd = (int)data.fd;
> + return ret;
> +}
> +
> +#define ONE_MEG (1024*1024)
> +
> +void do_test(char *heap_name)
> +{
> + int heap_fd = -1, dmabuf_fd = -1;
> + int ret;
> +
> + printf("Testing heap: %s\n", heap_name);
> +
> + heap_fd = dmabuf_heap_open(heap_name);
> + if (heap_fd < 0)
> + return;
> +
> + printf("Allocating 1 MEG\n");
> + ret = dmabuf_heap_alloc(heap_fd, ONE_MEG, 0, &dmabuf_fd);
> + if (ret)
> + goto out;
> +
> + /* DO SOMETHING WITH THE DMABUF HERE? */

You can do a call to mmap and write a pattern in the buffer.

Benjamin
> +
> +out:
> + if (dmabuf_fd >= 0)
> + close(dmabuf_fd);
> + if (heap_fd >= 0)
> + close(heap_fd);
> +}
> +
> +
> +int main(void)
> +{
> + DIR *d;
> + struct dirent *dir;
> +
> + d = opendir(DEVPATH);
> + if (!d) {
> + printf("No %s directory?\n", DEVPATH);
> + return -1;
> + }
> +
> + while ((dir = readdir(d)) != NULL)
> + do_test(dir->d_name);
> +
> +
> + return 0;
> +}
> --
> 2.7.4
>


--
Benjamin Gaignard

Graphic Study Group

Linaro.org │ Open source software for ARM SoCs

Follow Linaro: Facebook | Twitter | Blog

\
 
 \ /
  Last update: 2019-03-06 17:15    [W:0.166 / U:8.272 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site