From: Michel Dänzer <daenzer@vmware.com>
Date: Mon, 15 Jun 2009 14:56:13 +0000 (+0200)
Subject: drm/ttm: Add some powerpc cache flush code.
X-Git-Tag: v2.6.31-rc1~101^2~10
X-Git-Url: http://ftp.safe.ca/?a=commitdiff_plain;h=46f4b3eab73e621bc239bfa62ebdc44dcc0a877a;p=safe%2Fjmp%2Flinux-2.6

drm/ttm: Add some powerpc cache flush code.

Optimise the powerpc flushing path for TTM.

Signed-off-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
index c27ab3a..0331fa7 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -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