drm/ttm: add ttm_set_memory header (v2)

This patch moves all non-x86 abstraction to the ttm_set_memory header.
It is to make function calling more clearly.

(v2): add ttm_ prefix.
Suggested-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Bas Nieuwenhuizen <basni@chromium.org>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

include/drm/ttm/ttm_set_memory.h

+/**************************************************************************
+ *
+ * Copyright (c) 2018 Advanced Micro Devices, 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: Huang Rui <ray.huang@amd.com>
+ */
+
+#ifndef TTM_SET_MEMORY
+#define TTM_SET_MEMORY
+
+#include <linux/mm.h>
+
+#ifdef CONFIG_X86
+
+#include <asm/set_memory.h>
+
+static inline int ttm_set_pages_array_wb(struct page **pages, int addrinarray)
+{
+	return set_pages_array_wb(pages, addrinarray);
+}
+
+static inline int ttm_set_pages_array_wc(struct page **pages, int addrinarray)
+{
+	return set_pages_array_wc(pages, addrinarray);
+}
+
+static inline int ttm_set_pages_array_uc(struct page **pages, int addrinarray)
+{
+	return set_pages_array_uc(pages, addrinarray);
+}
+
+static inline int ttm_set_pages_wb(struct page *page, int numpages)
+{
+	return set_pages_wb(page, numpages);
+}
+
+#else /* for CONFIG_X86 */
+
+#if IS_ENABLED(CONFIG_AGP)
+
+#include <asm/agp.h>
+
+static inline int ttm_set_pages_array_wb(struct page **pages, int addrinarray)
+{
+	int i;
+
+	for (i = 0; i < addrinarray; i++)
+		unmap_page_from_agp(pages[i]);
+	return 0;
+}
+
+static inline int ttm_set_pages_array_wc(struct page **pages, int addrinarray)
+{
+	int i;
+
+	for (i = 0; i < addrinarray; i++)
+		map_page_into_agp(pages[i]);
+	return 0;
+}
+
+static inline int ttm_set_pages_array_uc(struct page **pages, int addrinarray)
+{
+	int i;
+
+	for (i = 0; i < addrinarray; i++)
+		map_page_into_agp(pages[i]);
+	return 0;
+}
+
+static inline int ttm_set_pages_wb(struct page *page, int numpages)
+{
+	int i;
+
+	for (i = 0; i < numpages; i++)
+		unmap_page_from_agp(page++);
+	return 0;
+}
+
+#else /* for CONFIG_AGP */
+
+static inline int ttm_set_pages_array_wb(struct page **pages, int addrinarray)
+{
+	return 0;
+}
+
+static inline int ttm_set_pages_array_wc(struct page **pages, int addrinarray)
+{
+	return 0;
+}
+
+static inline int ttm_set_pages_array_uc(struct page **pages, int addrinarray)
+{
+	return 0;
+}
+
+static inline int ttm_set_pages_wb(struct page *page, int numpages)
+{
+	return 0;
+}
+
+#endif /* for CONFIG_AGP */
+
+#endif /* for CONFIG_X86 */
+
+#endif