[Intel-gfx] [PATCH 2/4] drm/i915/selftests: Improve handling of iomem around stolen

[Tvrtko Ursulin]

On 06/01/2021 12:39, Chris Wilson wrote:
> Use memset_io() on the iomem, and silence sparse as we copy from the
> iomem to normal system pages.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> ---
>   drivers/gpu/drm/i915/gt/selftest_reset.c | 10 +++++-----
>   1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/gt/selftest_reset.c b/drivers/gpu/drm/i915/gt/selftest_reset.c
> index 5ec8d4e9983f..b7befcfbdcde 100644
> --- a/drivers/gpu/drm/i915/gt/selftest_reset.c
> +++ b/drivers/gpu/drm/i915/gt/selftest_reset.c
> @@ -96,10 +96,10 @@ __igt_reset_stolen(struct intel_gt *gt,
>   		if (!__drm_mm_interval_first(&gt->i915->mm.stolen,
>   					     page << PAGE_SHIFT,
>   					     ((page + 1) << PAGE_SHIFT) - 1))
> -			memset32(s, STACK_MAGIC, PAGE_SIZE / sizeof(u32));
> +			memset_io(s, STACK_MAGIC, PAGE_SIZE);
>   
> -		in = s;
> -		if (i915_memcpy_from_wc(tmp, s, PAGE_SIZE))
> +		in = (void __force *)s;
> +		if (i915_memcpy_from_wc(tmp, in, PAGE_SIZE))
>   			in = tmp;
>   		crc[page] = crc32_le(0, in, PAGE_SIZE);
>   
> @@ -134,8 +134,8 @@ __igt_reset_stolen(struct intel_gt *gt,
>   				      ggtt->error_capture.start,
>   				      PAGE_SIZE);
>   
> -		in = s;
> -		if (i915_memcpy_from_wc(tmp, s, PAGE_SIZE))
> +		in = (void __force *)s;
> +		if (i915_memcpy_from_wc(tmp, in, PAGE_SIZE))
>   			in = tmp;
>   		x = crc32_le(0, in, PAGE_SIZE);
>   
> 

Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

Regards,

Tvrtko