[igt-dev] [PATCH i-g-t 4/8] lib/igt_sriov_device: add helpers for operations in different VFs scenarios

[Michal Wajdeczko]

On 06.11.2023 20:59, Lukasz Laguna wrote:
> Added helpers:
> - for_each_vf and for_each_num_vfs
> - for_random_vf and for_random_num_vfs
> - for_last_vf and for_max_num_vfs
> 
> Signed-off-by: Lukasz Laguna <lukasz.laguna at intel.com>
> Reviewed-by: Marcin Bernatowicz <marcin.bernatowicz at linux.intel.com>
> ---
>  lib/igt_sriov_device.h | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/lib/igt_sriov_device.h b/lib/igt_sriov_device.h
> index be4e56cf3..78cb0e73b 100644
> --- a/lib/igt_sriov_device.h
> +++ b/lib/igt_sriov_device.h
> @@ -19,4 +19,22 @@ bool igt_sriov_disable_driver_autoprobe(int pf);
>  int igt_sriov_open_vf_drm_device(int pf, unsigned int vf_num);
>  bool igt_sriov_is_vf_drm_driver_probed(int pf, unsigned int vf_num);
>  

please document macros and their params

> +#define for_each_vf(__pf_fd, __vf_num) \
> +	for (unsigned int __vf_num = 1, __total_vfs = igt_sriov_get_total_vfs(__pf_fd); \
> +	     __vf_num <= __total_vfs; \
> +	     ++__vf_num)
> +#define for_each_num_vfs for_each_vf

why do you need this alias ?

> +
> +#define for_random_vf(__pf_fd, __vf_num) \
> +	for (unsigned int __vf_num = 1 + random() % igt_sriov_get_total_vfs(__pf_fd), __tmp = 0; \
> +	     __tmp < 1; \
> +	     ++__tmp)
> +#define for_random_num_vfs for_random_vf
> +
> +#define for_last_vf(__pf_fd, __vf_num) \
> +	for (unsigned int __vf_num = igt_sriov_get_total_vfs(__pf_fd), __tmp = 0; \
> +	     __tmp < 1; \
> +	     ++__tmp)
> +#define for_max_num_vfs for_last_vf
> +
>  #endif /* __IGT_SRIOV_DEVICE_H__ */