FreeBSD/Linux Kernel Cross Reference
sys/compat/linuxkpi/common/include/linux/gfp.h

     /*-
      * Copyright (c) 2010 Isilon Systems, Inc.
      * Copyright (c) 2010 iX Systems, Inc.
      * Copyright (c) 2010 Panasas, Inc.
      * Copyright (c) 2013-2017 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.
     *
     * $FreeBSD$
     */
    #ifndef _LINUXKPI_LINUX_GFP_H_
    #define _LINUXKPI_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_NORETRY   0
    #define __GFP_NOMEMALLOC 0
    #define __GFP_RECLAIM   0
    #define __GFP_RECLAIMABLE   0
    #define __GFP_RETRY_MAYFAIL 0
    #define __GFP_MOVABLE   0
    #define __GFP_COMP      0
    #define __GFP_KSWAPD_RECLAIM 0
    
    #define __GFP_IO        0
    #define __GFP_NO_KSWAPD 0
    #define __GFP_KSWAPD_RECLAIM    0
    #define __GFP_WAIT      M_WAITOK
    #define __GFP_DMA32     (1U << 24) /* LinuxKPI only */
    #define __GFP_BITS_SHIFT 25
    #define __GFP_BITS_MASK ((1 << __GFP_BITS_SHIFT) - 1)
    #define __GFP_NOFAIL    M_WAITOK
    
    #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
    #define GFP_NOIO        M_NOWAIT
    #define GFP_NOFS        M_NOWAIT
    #define GFP_DMA32       __GFP_DMA32
    #define GFP_TEMPORARY   M_NOWAIT
    #define GFP_NATIVE_MASK (M_NOWAIT | M_WAITOK | M_USE_RESERVE | M_ZERO)
    #define GFP_TRANSHUGE   0
    #define GFP_TRANSHUGE_LIGHT     0
    
    CTASSERT((__GFP_DMA32 & GFP_NATIVE_MASK) == 0);
    CTASSERT((__GFP_BITS_MASK & GFP_NATIVE_MASK) == GFP_NATIVE_MASK);
    
    struct page_frag_cache {
            void *va;
            int pagecnt_bias;
    };
    
    /*
     * Resolve a page into a virtual address:
     *
     * NOTE: This function only works for pages allocated by the kernel.
     */
    extern void *linux_page_address(struct page *);
    
    #define page_address(page) linux_page_address(page)
    
    /*
    * Page management for unmapped pages:
    */
   extern vm_page_t linux_alloc_pages(gfp_t flags, unsigned int order);
   extern void linux_free_pages(vm_page_t page, unsigned int order);
   void *linuxkpi_page_frag_alloc(struct page_frag_cache *, size_t, gfp_t);
   void linuxkpi_page_frag_free(void *);
   void linuxkpi__page_frag_cache_drain(struct page *, size_t);
   
   static inline struct page *
   alloc_page(gfp_t flags)
   {
   
           return (linux_alloc_pages(flags, 0));
   }
   
   static inline struct page *
   alloc_pages(gfp_t flags, unsigned int order)
   {
   
           return (linux_alloc_pages(flags, order));
   }
   
   static inline struct page *
   alloc_pages_node(int node_id, gfp_t flags, unsigned int order)
   {
   
           return (linux_alloc_pages(flags, order));
   }
   
   static inline void
   __free_pages(struct page *page, unsigned int order)
   {
   
           linux_free_pages(page, order);
   }
   
   static inline void
   __free_page(struct page *page)
   {
   
           linux_free_pages(page, 0);
   }
   
   /*
    * Page management for mapped pages:
    */
   extern vm_offset_t linux_alloc_kmem(gfp_t flags, unsigned int order);
   extern void linux_free_kmem(vm_offset_t, unsigned int order);
   
   static inline vm_offset_t
   get_zeroed_page(gfp_t flags)
   {
   
           return (linux_alloc_kmem(flags | __GFP_ZERO, 0));
   }
   
   static inline vm_offset_t
   __get_free_page(gfp_t flags)
   {
   
           return (linux_alloc_kmem(flags, 0));
   }
   
   static inline vm_offset_t
   __get_free_pages(gfp_t flags, unsigned int order)
   {
   
           return (linux_alloc_kmem(flags, order));
   }
   
   static inline void
   free_pages(uintptr_t addr, unsigned int order)
   {
           if (addr == 0)
                   return;
   
           linux_free_kmem(addr, order);
   }
   
   static inline void
   free_page(uintptr_t addr)
   {
           if (addr == 0)
                   return;
   
           linux_free_kmem(addr, 0);
   }
   
   static inline void *
   page_frag_alloc(struct page_frag_cache *pfc, size_t fragsz, gfp_t gfp)
   {
   
           return (linuxkpi_page_frag_alloc(pfc, fragsz, gfp));
   }
   
   static inline void
   page_frag_free(void *addr)
   {
   
           linuxkpi_page_frag_free(addr);
   }
   
   static inline void
   __page_frag_cache_drain(struct page *page, size_t count)
   {
   
           linuxkpi__page_frag_cache_drain(page, count);
   }
   
   static inline bool
   gfpflags_allow_blocking(const gfp_t gfp_flags)
   {
           return ((gfp_flags & (M_WAITOK | M_NOWAIT)) == M_WAITOK);
   }
   
   #define SetPageReserved(page)   do { } while (0)        /* NOP */
   #define ClearPageReserved(page) do { } while (0)        /* NOP */
   
   #endif  /* _LINUXKPI_LINUX_GFP_H_ */

Cache object: d5af37d4d37e7ffa21a973f7109f11db