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Commit 46f4b3ea authored by Michel Dänzer's avatar Michel Dänzer Committed by Dave Airlie
Browse files

drm/ttm: Add some powerpc cache flush code. 



Optimise the powerpc flushing path for TTM.

Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 919f32f1

drivers/gpu/drm/ttm/ttm_tt.c

+10 −1
Original line number Diff line number Diff line
@@ -68,7 +68,7 @@ static void ttm_tt_cache_flush_clflush(struct page *pages[], 
		ttm_tt_clflush_page(*pages++);

	mb();

}

#else

#elif !defined(__powerpc__)

static void ttm_tt_ipi_handler(void *null)

{

	;
@@ -83,6 +83,15 @@ void ttm_tt_cache_flush(struct page *pages[], unsigned long num_pages) 
		ttm_tt_cache_flush_clflush(pages, num_pages);

		return;

	}

#elif defined(__powerpc__)

	unsigned long i;



	for (i = 0; i < num_pages; ++i) {

		if (pages[i]) {

			unsigned long start = (unsigned long)page_address(pages[i]);

			flush_dcache_range(start, start + PAGE_SIZE);

		}

	}

#else

	if (on_each_cpu(ttm_tt_ipi_handler, NULL, 1) != 0)

		printk(KERN_ERR TTM_PFX