[Intel-gfx] [PATCH i-g-t] tests: Add exercise for fbdev

[Ville Syrjälä]

On Wed, Nov 13, 2019 at 07:28:54PM +0000, Chris Wilson wrote:
> I broke fb_mmap() proving that we need a test in CI!
> 
> References: https://bugs.freedesktop.org/show_bug.cgi?id=112256
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> ---
>  tests/Makefile.sources                |  1 +
>  tests/fbdev.c                         | 69 +++++++++++++++++++++++++++
>  tests/intel-ci/fast-feedback.testlist |  1 +
>  tests/meson.build                     |  1 +
>  4 files changed, 72 insertions(+)
>  create mode 100644 tests/fbdev.c
> 
> diff --git a/tests/Makefile.sources b/tests/Makefile.sources
> index abf1e2fc1..6b1d4cb22 100644
> --- a/tests/Makefile.sources
> +++ b/tests/Makefile.sources
> @@ -24,6 +24,7 @@ TESTS_progs = \
>  	drm_import_export \
>  	drm_mm \
>  	drm_read \
> +	fbdev \
>  	kms_3d \
>  	kms_addfb_basic \
>  	kms_atomic \
> diff --git a/tests/fbdev.c b/tests/fbdev.c
> new file mode 100644
> index 000000000..170f5dd52
> --- /dev/null
> +++ b/tests/fbdev.c
> @@ -0,0 +1,69 @@
> +/*
> + * Copyright © 2019 Intel Corporation
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> + * copy of this software and associated documentation files (the "Software"),
> + * to deal in the Software without restriction, including without limitation
> + * the rights to use, copy, modify, merge, publish, distribute, sublicense,
> + * and/or sell copies of the Software, and to permit persons to whom the
> + * Software is furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice (including the next
> + * paragraph) shall be included in all copies or substantial portions of the
> + * Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
> + * IN THE SOFTWARE.
> + */
> +
> +#include "config.h"
> +
> +#include "igt.h"
> +
> +#include <fcntl.h>
> +#include <string.h>
> +#include <sys/ioctl.h>
> +#include <sys/mman.h>
> +#include <sys/stat.h>
> +#include <sys/types.h>
> +#include <unistd.h>
> +
> +#include <linux/fb.h>
> +
> +#include "igt.h"
> +
> +igt_main
> +{
> +	struct fb_var_screeninfo var_info;
> +	struct fb_fix_screeninfo fix_info;
> +	int fd = -1;
> +
> +	igt_fixture {
> +		fd = open("/dev/fb0", O_RDWR);
> +		igt_require_f(fd != -1, "/dev/fb0\n");

I suppose we may want to iterate over all the devices eventually.

> +
> +		igt_require(ioctl(fd, FBIOGET_VSCREENINFO, &var_info) == 0);
> +		igt_require(ioctl(fd, FBIOGET_FSCREENINFO, &fix_info) == 0);
> +	}
> +
> +	igt_subtest("mmap") {
> +		unsigned long size;
> +		void *map;
> +
> +		size = var_info.yres * fix_info.line_length;

Or maybe just fix.smem_len?

Either way
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

> +		map = mmap(NULL, size, PROT_WRITE, MAP_SHARED, fd, 0);
> +		igt_assert(map != MAP_FAILED);
> +
> +		memset(map, 0, size);
> +		munmap(map, size);

Another future idea would be to do a crc check to make sure we're
actually affecting the screen contents when we poke at the thing.

> +	}
> +
> +	igt_fixture {
> +		close(fd);
> +	}
> +}
> diff --git a/tests/intel-ci/fast-feedback.testlist b/tests/intel-ci/fast-feedback.testlist
> index 9dd27b42e..dec6fdda1 100644
> --- a/tests/intel-ci/fast-feedback.testlist
> +++ b/tests/intel-ci/fast-feedback.testlist
> @@ -2,6 +2,7 @@
>  
>  igt at core_auth@basic-auth
>  igt at debugfs_test@read_all_entries
> +igt at fbdev@mmap
>  igt at gem_basic@bad-close
>  igt at gem_basic@create-close
>  igt at gem_basic@create-fd-close
> diff --git a/tests/meson.build b/tests/meson.build
> index 98f2db555..44bddd027 100644
> --- a/tests/meson.build
> +++ b/tests/meson.build
> @@ -9,6 +9,7 @@ test_progs = [
>  	'drm_import_export',
>  	'drm_mm',
>  	'drm_read',
> +	'fbdev',
>  	'kms_3d',
>  	'kms_addfb_basic',
>  	'kms_atomic',
> -- 
> 2.24.0
> 
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-- 
Ville Syrjälä
Intel