drm/ttm: consolidate cache flushing code in one place.

This merges the TTM and drm cache flushing into one file in the
drm core.
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/drm_cache.c

@@ -45,25 +45,58 @@ drm_clflush_page(struct page *page)
 		clflush(page_virtual + i);
 	kunmap_atomic(page_virtual, KM_USER0);
 }
-#endif
 
+static void drm_cache_flush_clflush(struct page *pages[],
+				    unsigned long num_pages)
+{
+	unsigned long i;
+
+	mb();
+	for (i = 0; i < num_pages; i++)
+		drm_clflush_page(*pages++);
+	mb();
+}
+
+static void
+drm_clflush_ipi_handler(void *null)
+{
+	wbinvd();
+}
+#elif !defined(__powerpc__)
+static void drm_cache_ipi_handler(void *dummy)
+{
+}
+#endif
 void
 drm_clflush_pages(struct page *pages[], unsigned long num_pages)
 {
 
 #if defined(CONFIG_X86)
 	if (cpu_has_clflush) {
-		unsigned long i;
-
-		mb();
-		for (i = 0; i < num_pages; ++i)
-			drm_clflush_page(*pages++);
-		mb();
-
+		drm_cache_flush_clflush(pages, num_pages);
 		return;
 	}
 
-	wbinvd();
+	if (on_each_cpu(drm_clflush_ipi_handler, NULL, 1) != 0)
+		printk(KERN_ERR "Timed out waiting for cache flush.\n");
+
+#elif defined(__powerpc__)
+	unsigned long i;
+	for (i = 0; i < num_pages; i++) {
+		struct page *page = pages[i];
+		void *page_virtual;
+
+		if (unlikely(page == NULL))
+			continue;
+
+		page_virtual = kmap_atomic(page, KM_USER0);
+		flush_dcache_range((unsigned long)page_virtual,
+				   (unsigned long)page_virtual + PAGE_SIZE);
+		kunmap_atomic(page_virtual, KM_USER0);
+	}
+#else
+	if (on_each_cpu(drm_clflush_ipi_handler, NULL, 1) != 0)
+		printk(KERN_ERR "Timed out waiting for drm cache flush\n");
 #endif
 }
 EXPORT_SYMBOL(drm_clflush_pages);

drivers/gpu/drm/ttm/ttm_tt.c

@@ -34,76 +34,13 @@
 #include <linux/pagemap.h>
 #include <linux/file.h>
 #include <linux/swap.h>
+#include "drm_cache.h"
 #include "ttm/ttm_module.h"
 #include "ttm/ttm_bo_driver.h"
 #include "ttm/ttm_placement.h"
 
 static int ttm_tt_swapin(struct ttm_tt *ttm);
 
-#if defined(CONFIG_X86)
-static void ttm_tt_clflush_page(struct page *page)
-{
-	uint8_t *page_virtual;
-	unsigned int i;
-
-	if (unlikely(page == NULL))
-		return;
-
-	page_virtual = kmap_atomic(page, KM_USER0);
-
-	for (i = 0; i < PAGE_SIZE; i += boot_cpu_data.x86_clflush_size)
-		clflush(page_virtual + i);
-
-	kunmap_atomic(page_virtual, KM_USER0);
-}
-
-static void ttm_tt_cache_flush_clflush(struct page *pages[],
-				       unsigned long num_pages)
-{
-	unsigned long i;
-
-	mb();
-	for (i = 0; i < num_pages; ++i)
-		ttm_tt_clflush_page(*pages++);
-	mb();
-}
-#elif !defined(__powerpc__)
-static void ttm_tt_ipi_handler(void *null)
-{
-	;
-}
-#endif
-
-void ttm_tt_cache_flush(struct page *pages[], unsigned long num_pages)
-{
-
-#if defined(CONFIG_X86)
-	if (cpu_has_clflush) {
-		ttm_tt_cache_flush_clflush(pages, num_pages);
-		return;
-	}
-#elif defined(__powerpc__)
-	unsigned long i;
-
-	for (i = 0; i < num_pages; ++i) {
-		struct page *page = pages[i];
-		void *page_virtual;
-
-		if (unlikely(page == NULL))
-			continue;
-
-		page_virtual = kmap_atomic(page, KM_USER0);
-		flush_dcache_range((unsigned long) page_virtual,
-				   (unsigned long) page_virtual + PAGE_SIZE);
-		kunmap_atomic(page_virtual, KM_USER0);
-	}
-#else
-	if (on_each_cpu(ttm_tt_ipi_handler, NULL, 1) != 0)
-		printk(KERN_ERR TTM_PFX
-		       "Timed out waiting for drm cache flush.\n");
-#endif
-}
-
 /**
  * Allocates storage for pointers to the pages that back the ttm.
  *
@@ -302,7 +239,7 @@ static int ttm_tt_set_caching(struct ttm_tt *ttm,
 	}
 
 	if (ttm->caching_state == tt_cached)
-		ttm_tt_cache_flush(ttm->pages, ttm->num_pages);
+		drm_clflush_pages(ttm->pages, ttm->num_pages);
 
 	for (i = 0; i < ttm->num_pages; ++i) {
 		cur_page = ttm->pages[i];

include/drm/drm_cache.h

+/**************************************************************************
+ *
+ * Copyright 2009 Red Hat Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ *
+ **************************************************************************/
+/*
+ * Authors:
+ * Dave Airlie <airlied@redhat.com>
+ */
+
+#ifndef _DRM_CACHE_H_
+#define _DRM_CACHE_H_
+
+void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
+
+#endif