[PATCH v9 1/7] lib/intel_wa: Add check for workaround in GTs

[Kamil Konieczny]

Hi Mohammed,
On 2025-06-30 at 20:49:50 +0530, Mohammed Thasleem wrote:
> This function check the given workaround on available GTs.
> 
> v2: Add discription for return. (Kamil)
>     Rename function to igt_has_intel_wa. (Kamil)
>     Move lib changes to lib/igt_debugfs. (Kamil)
>     Dump the whole wa sysfs file and then search for the wa. (Vinod)
>     Use return true/false directly instead assigning value. (Vinod)
> v3: Updated return type discription and debugfs_fd failure check. (Kamil)
>     Return 0 or 1 instead of true or false. (Kamil)
> v4: Add check for xe device before execution. (Vinod)
> v5: Move igt_has_intel_wa to lib/intel_wa. (Kamil)
> v6: Remove unused header and move xe check to intel_is_fbc_supported. (Kamil)
> v7: Update the title and move header from .h to .c file. (Kamil)
> v8: Close debugfs_fd before exit. (Kamil)
> v9: Remove null ckeck and single line coment for SPDX license. (Kamil)

imho 'fix SPDX line'
This could be fixed at merge, no need for resend,

Reviewed-by: Kamil Konieczny <kamil.konieczny at linux.intel.com>

> 
> Signed-off-by: Mohammed Thasleem <mohammed.thasleem at intel.com>
> ---
>  lib/intel_wa.c  | 54 +++++++++++++++++++++++++++++++++++++++++++++++++
>  lib/intel_wa.h  | 11 ++++++++++
>  lib/meson.build |  1 +
>  3 files changed, 66 insertions(+)
>  create mode 100644 lib/intel_wa.c
>  create mode 100644 lib/intel_wa.h
> 
> diff --git a/lib/intel_wa.c b/lib/intel_wa.c
> new file mode 100644
> index 000000000..685df106f
> --- /dev/null
> +++ b/lib/intel_wa.c
> @@ -0,0 +1,54 @@
> +// SPDX-License-Identifier: MIT
> +/*
> + * Copyright © 2025 Intel Corporation
> + */
> +
> +#include <fcntl.h>
> +#include <stdint.h>
> +#include <stdio.h>
> +
> +#include "igt_debugfs.h"
> +#include "igt_sysfs.h"
> +#include "intel_wa.h"
> +#include "xe/xe_query.h"
> +
> +/**
> + * igt_has_intel_wa:
> + * @drm_fd:	A drm file descriptor
> + * @check_wa:	Workaround to be checked
> + *
> + * Returns:	0 if no WA, 1 if WA present, -1 on error
> + */
> +int igt_has_intel_wa(int drm_fd, const char *check_wa)
> +{
> +	int ret = 0;
> +	int debugfs_fd;
> +	unsigned int xe;
> +	char name[256];
> +	char *debugfs_dump, *has_wa;
> +
> +	debugfs_fd = igt_debugfs_dir(drm_fd);
> +	if (debugfs_fd == -1)
> +		return -1;
> +
> +	xe_for_each_gt(drm_fd, xe) {
> +		sprintf(name, "gt%d/workarounds", xe);
> +		if (!igt_debugfs_exists(drm_fd, name, O_RDONLY)) {
> +			ret = -1;
> +			break;
> +		}
> +
> +		debugfs_dump = igt_sysfs_get(debugfs_fd, name);
> +		if (debugfs_dump) {
> +			has_wa = strstr(debugfs_dump, check_wa);
> +			free(debugfs_dump);
> +			if (has_wa) {
> +				ret = 1;
> +				break;
> +			}
> +		}
> +	}
> +
> +	close(debugfs_fd);
> +	return ret;
> +}
> diff --git a/lib/intel_wa.h b/lib/intel_wa.h
> new file mode 100644
> index 000000000..765a5948e
> --- /dev/null
> +++ b/lib/intel_wa.h
> @@ -0,0 +1,11 @@
> +/* SPDX-License-Identifier: MIT */
> +/*
> + * Copyright © 2025 Intel Corporation
> + */
> +
> +#ifndef __INTEL_WA_H__
> +#define __INTEL_WA_H__
> +
> +int igt_has_intel_wa(int drm_fd, const char *check_wa);
> +
> +#endif /* __INTEL_WA_H__ */
> diff --git a/lib/meson.build b/lib/meson.build
> index 5e4247aad..ef397fe45 100644
> --- a/lib/meson.build
> +++ b/lib/meson.build
> @@ -88,6 +88,7 @@ lib_sources = [
>  	'intel_aux_pgtable.c',
>  	'intel_reg_map.c',
>  	'intel_iosf.c',
> +        'intel_wa.c',
>  	'igt_kms.c',
>  	'igt_fb.c',
>  	'igt_core.c',
> -- 
> 2.25.1
>