linuxkpi: Add asm/set_memory.h

Provide functions needed for drm-kmod.

MFC after:      1 week
Sponsored by:	Beckhoff Automation GmbH & Co. KG
Differential Revision:	https://reviews.freebsd.org/D35571

1 files changed, 117 insertions, 0 deletions

diff --git a/sys/compat/linuxkpi/common/include/asm/set_memory.h b/sys/compat/linuxkpi/common/include/asm/set_memory.h
new file mode 100644
index 000000000000..cdb7ad912acc
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/asm/set_memory.h
@@ -0,0 +1,117 @@
+/*-
+ * Copyright (c) 2010 Isilon Systems, Inc.
+ * Copyright (c) 2016 Matt Macy (mmacy@nextbsd.org)
+ * Copyright (c) 2017 Mellanox Technologies, Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice unmodified, this list of conditions, and the following
+ *    disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _LINUXKPI_ASM_SET_MEMORY_H_
+#define	_LINUXKPI_ASM_SET_MEMORY_H_
+
+#include <linux/page.h>
+
+static inline int
+set_memory_uc(unsigned long addr, int numpages)
+{
+	return (pmap_change_attr(addr, numpages, VM_MEMATTR_UNCACHEABLE));
+}
+
+static inline int
+set_memory_wc(unsigned long addr, int numpages)
+{
+#ifdef VM_MEMATTR_WRITE_COMBINING
+	return (pmap_change_attr(addr, numpages, VM_MEMATTR_WRITE_COMBINING));
+#else
+	return (set_memory_uc(addr, numpages));
+#endif
+}
+
+static inline int
+set_memory_wb(unsigned long addr, int numpages)
+{
+	return (pmap_change_attr(addr, numpages, VM_MEMATTR_WRITE_BACK));
+}
+
+static inline int
+set_pages_uc(vm_page_t page, int numpages)
+{
+	KASSERT(numpages == 1, ("%s: numpages %d", __func__, numpages));
+
+	pmap_page_set_memattr(page, VM_MEMATTR_UNCACHEABLE);
+	return (0);
+}
+
+static inline int
+set_pages_wc(vm_page_t page, int numpages)
+{
+	KASSERT(numpages == 1, ("%s: numpages %d", __func__, numpages));
+
+#ifdef VM_MEMATTR_WRITE_COMBINING
+	pmap_page_set_memattr(page, VM_MEMATTR_WRITE_COMBINING);
+#else
+	return (set_pages_uc(page, numpages));
+#endif
+	return (0);
+}
+
+static inline int
+set_pages_wb(vm_page_t page, int numpages)
+{
+	KASSERT(numpages == 1, ("%s: numpages %d", __func__, numpages));
+
+	pmap_page_set_memattr(page, VM_MEMATTR_WRITE_BACK);
+	return (0);
+}
+
+static inline int
+set_pages_array_wb(vm_page_t *pages, int addrinarray)
+{
+	int i;
+
+	for (i = 0; i < addrinarray; i++)
+		set_pages_wb(pages[i], 1);
+	return (0);
+}
+
+static inline int
+set_pages_array_wc(vm_page_t *pages, int addrinarray)
+{
+	int i;
+
+	for (i = 0; i < addrinarray; i++)
+		set_pages_wc(pages[i], 1);
+	return (0);
+}
+
+static inline int
+set_pages_array_uc(vm_page_t *pages, int addrinarray)
+{
+	int i;
+
+	for (i = 0; i < addrinarray; i++)
+		set_pages_uc(pages[i], 1);
+	return (0);
+}
+
+#endif	/* _LINUXKPI_ASM_SET_MEMORY_H_ */