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-rw-r--r--sys/compat/linuxkpi/common/include/linux/gfp.h149
1 files changed, 149 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/gfp.h b/sys/compat/linuxkpi/common/include/linux/gfp.h
new file mode 100644
index 000000000000..a82f30d15ac6
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/gfp.h
@@ -0,0 +1,149 @@
+/*-
+ * Copyright (c) 2010 Isilon Systems, Inc.
+ * Copyright (c) 2010 iX Systems, Inc.
+ * Copyright (c) 2010 Panasas, Inc.
+ * Copyright (c) 2013 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.
+ *
+ * $FreeBSD$
+ */
+#ifndef _LINUX_GFP_H_
+#define _LINUX_GFP_H_
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+
+#include <linux/page.h>
+
+#include <vm/vm_param.h>
+#include <vm/vm_object.h>
+#include <vm/vm_extern.h>
+#include <vm/vm_kern.h>
+
+#define __GFP_NOWARN 0
+#define __GFP_HIGHMEM 0
+#define __GFP_ZERO M_ZERO
+
+#define GFP_NOWAIT M_NOWAIT
+#define GFP_ATOMIC (M_NOWAIT | M_USE_RESERVE)
+#define GFP_KERNEL M_WAITOK
+#define GFP_USER M_WAITOK
+#define GFP_HIGHUSER M_WAITOK
+#define GFP_HIGHUSER_MOVABLE M_WAITOK
+#define GFP_IOFS M_NOWAIT
+
+static inline void *
+page_address(struct page *page)
+{
+
+ if (page->object != kmem_object && page->object != kernel_object)
+ return (NULL);
+ return ((void *)(uintptr_t)(VM_MIN_KERNEL_ADDRESS +
+ IDX_TO_OFF(page->pindex)));
+}
+
+static inline unsigned long
+_get_page(gfp_t mask)
+{
+
+ return kmem_malloc(kmem_arena, PAGE_SIZE, mask);
+}
+
+#define get_zeroed_page(mask) _get_page((mask) | M_ZERO)
+#define alloc_page(mask) virt_to_page(_get_page((mask)))
+#define __get_free_page(mask) _get_page((mask))
+
+static inline void
+free_page(unsigned long page)
+{
+
+ if (page == 0)
+ return;
+ kmem_free(kmem_arena, page, PAGE_SIZE);
+}
+
+static inline void
+__free_page(struct page *m)
+{
+
+ if (m->object != kmem_object)
+ panic("__free_page: Freed page %p not allocated via wrappers.",
+ m);
+ kmem_free(kmem_arena, (vm_offset_t)page_address(m), PAGE_SIZE);
+}
+
+static inline void
+__free_pages(struct page *m, unsigned int order)
+{
+ size_t size;
+
+ if (m == NULL)
+ return;
+ size = PAGE_SIZE << order;
+ kmem_free(kmem_arena, (vm_offset_t)page_address(m), size);
+}
+
+static inline void free_pages(uintptr_t addr, unsigned int order)
+{
+ if (addr == 0)
+ return;
+ __free_pages(virt_to_page((void *)addr), order);
+}
+
+/*
+ * Alloc pages allocates directly from the buddy allocator on linux so
+ * order specifies a power of two bucket of pages and the results
+ * are expected to be aligned on the size as well.
+ */
+static inline struct page *
+alloc_pages(gfp_t gfp_mask, unsigned int order)
+{
+ unsigned long page;
+ size_t size;
+
+ size = PAGE_SIZE << order;
+ page = kmem_alloc_contig(kmem_arena, size, gfp_mask, 0, -1,
+ size, 0, VM_MEMATTR_DEFAULT);
+ if (page == 0)
+ return (NULL);
+ return (virt_to_page(page));
+}
+
+static inline uintptr_t __get_free_pages(gfp_t gfp_mask, unsigned int order)
+{
+ struct page *page;
+
+ page = alloc_pages(gfp_mask, order);
+ if (page == NULL)
+ return (0);
+ return ((uintptr_t)page_address(page));
+}
+
+#define alloc_pages_node(node, mask, order) alloc_pages(mask, order)
+
+#define kmalloc_node(chunk, mask, node) kmalloc(chunk, mask)
+
+#endif /* _LINUX_GFP_H_ */