linux-kernel - Re: [PATCH 02/19] iosys-map: Add offset to iosys_map_memcpy

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Date:   Fri, 4 Feb 2022 11:28:08 -0800
From:   Lucas De Marchi <lucas.demarchi@...el.com>
To:     Thomas Zimmermann <tzimmermann@...e.de>
Cc:     intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        Matthew Brost <matthew.brost@...el.com>,
        Thomas Hellström 
        <thomas.hellstrom@...ux.intel.com>, linux-kernel@...r.kernel.org,
        Daniele Ceraolo Spurio <daniele.ceraolospurio@...el.com>,
        Christian König <christian.koenig@....com>,
        John Harrison <John.C.Harrison@...el.com>
Subject: Re: [PATCH 02/19] iosys-map: Add offset to iosys_map_memcpy_to()

On Fri, Feb 04, 2022 at 07:48:10PM +0100, Thomas Zimmermann wrote:
>Hi
>
>Am 04.02.22 um 18:44 schrieb Lucas De Marchi:
>>In certain situations it's useful to be able to write to an
>>offset of the mapping. Add a dst_offset to iosys_map_memcpy_to().
>>
>>Cc: Sumit Semwal <sumit.semwal@...aro.org>
>>Cc: Christian König <christian.koenig@....com>
>>Cc: Thomas Zimmermann <tzimmermann@...e.de>
>>Cc: dri-devel@...ts.freedesktop.org
>>Cc: linux-kernel@...r.kernel.org
>>Signed-off-by: Lucas De Marchi <lucas.demarchi@...el.com>
>>---
>>  drivers/gpu/drm/drm_cache.c     |  2 +-
>>  drivers/gpu/drm/drm_fb_helper.c |  2 +-
>>  include/linux/iosys-map.h       | 17 +++++++++--------
>>  3 files changed, 11 insertions(+), 10 deletions(-)
>>
>>diff --git a/drivers/gpu/drm/drm_cache.c b/drivers/gpu/drm/drm_cache.c
>>index 66597e411764..c3e6e615bf09 100644
>>--- a/drivers/gpu/drm/drm_cache.c
>>+++ b/drivers/gpu/drm/drm_cache.c
>>@@ -218,7 +218,7 @@ static void memcpy_fallback(struct iosys_map *dst,
>>  	if (!dst->is_iomem && !src->is_iomem) {
>>  		memcpy(dst->vaddr, src->vaddr, len);
>>  	} else if (!src->is_iomem) {
>>-		iosys_map_memcpy_to(dst, src->vaddr, len);
>>+		iosys_map_memcpy_to(dst, 0, src->vaddr, len);
>>  	} else if (!dst->is_iomem) {
>>  		memcpy_fromio(dst->vaddr, src->vaddr_iomem, len);
>>  	} else {
>>diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
>>index 238f815cb2a0..bf5cc9a42e5a 100644
>>--- a/drivers/gpu/drm/drm_fb_helper.c
>>+++ b/drivers/gpu/drm/drm_fb_helper.c
>>@@ -385,7 +385,7 @@ static void drm_fb_helper_damage_blit_real(struct drm_fb_helper *fb_helper,
>>  	iosys_map_incr(dst, offset); /* go to first pixel within clip rect */
>>  	for (y = clip->y1; y < clip->y2; y++) {
>>-		iosys_map_memcpy_to(dst, src, len);
>>+		iosys_map_memcpy_to(dst, 0, src, len);
>>  		iosys_map_incr(dst, fb->pitches[0]);
>>  		src += fb->pitches[0];
>>  	}
>>diff --git a/include/linux/iosys-map.h b/include/linux/iosys-map.h
>>index f4186f91caa6..edd7fa3be9e9 100644
>>--- a/include/linux/iosys-map.h
>>+++ b/include/linux/iosys-map.h
>>@@ -220,22 +220,23 @@ static inline void iosys_map_clear(struct iosys_map *map)
>>  }
>>  /**
>>- * iosys_map_memcpy_to - Memcpy into iosys mapping
>>+ * iosys_map_memcpy_to_offset - Memcpy into offset of iosys_map
>
>'iosys_map_memcpy_to'
>
>With that fixed:
>
>Reviewed-by: Thomas Zimmermann <tzimmermann@...e.de>

thanks, I noticed that, but looks like I squashed to the wrong patch.

Lucas De Marchi