1 /* 2 * Copyright (c) 2015 François Tigeot 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef _LINUX_GFP_H_ 28 #define _LINUX_GFP_H_ 29 30 #include <vm/vm_page.h> 31 #include <machine/bus_dma.h> 32 33 #define GFP_NOWAIT M_NOWAIT 34 #define GFP_ATOMIC M_NOWAIT 35 #define GFP_KERNEL M_WAITOK 36 #define GFP_TEMPORARY M_WAITOK 37 #define __GFP_ZERO M_ZERO 38 39 #define GFP_DMA32 0x10000 /* XXX: MUST NOT collide with the M_XXX definitions */ 40 41 static inline void __free_page(struct vm_page *page) 42 { 43 vm_page_free_contig(page, PAGE_SIZE); 44 } 45 46 static inline struct vm_page * alloc_page(int flags) 47 { 48 vm_paddr_t high = ~0LLU; 49 50 if (flags & GFP_DMA32) 51 high = BUS_SPACE_MAXADDR_32BIT; 52 53 return vm_page_alloc_contig(0LLU, ~0LLU, 54 PAGE_SIZE, PAGE_SIZE, PAGE_SIZE, 55 VM_MEMATTR_DEFAULT); 56 } 57 58 #endif /* _LINUX_GFP_H_ */ 59