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Commit 82626363 authored by Chunming Zhou's avatar Chunming Zhou Committed by Alex Deucher
Browse files

drm: add func to get max iomem address v2 



it will be used to check if the driver needs swiotlb
v2: Don't use inline, instead, move function to drm_memory.c (Michel Daenzer <michel@daenzer.net>)

Signed-off-by: default avatarChunming Zhou <david1.zhou@amd.com>
Reviewed-by: default avatarMonk Liu <monk.liu@amd.com>
Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Reviewed-by: default avatarMichel Dänzer <michel.daenzer@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180209024410.1469-1-david1.zhou@amd.com
parent 65101d8c

drivers/gpu/drm/drm_memory.c

+13 −0
Original line number Diff line number Diff line
@@ -149,3 +149,16 @@ void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev) 
		iounmap(map->handle);

}

EXPORT_SYMBOL(drm_legacy_ioremapfree);



u64 drm_get_max_iomem(void)

{

	struct resource *tmp;

	u64 max_iomem = 0;



	for (tmp = iomem_resource.child; tmp; tmp = tmp->sibling) {

		max_iomem = max(max_iomem,  tmp->end);

	}



	return max_iomem;

}

EXPORT_SYMBOL(drm_get_max_iomem);

include/drm/drm_cache.h

+2 −0
Original line number Diff line number Diff line
@@ -38,6 +38,8 @@ 
void drm_clflush_pages(struct page *pages[], unsigned long num_pages);

void drm_clflush_sg(struct sg_table *st);

void drm_clflush_virt_range(void *addr, unsigned long length);

u64 drm_get_max_iomem(void);





static inline bool drm_arch_can_wc_memory(void)

{