1 /*- 2 * Copyright (c) 2017 Mellanox Technologies, Ltd. 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 _LINUXKPI_LINUX_PFN_T_H_ 28 #define _LINUXKPI_LINUX_PFN_T_H_ 29 30 #include <linux/mm.h> 31 32 CTASSERT(PAGE_SHIFT > 4); 33 34 #define PFN_FLAGS_MASK (((u64)(PAGE_SIZE - 1)) << (64 - PAGE_SHIFT)) 35 #define PFN_SG_CHAIN (1ULL << (64 - 1)) 36 #define PFN_SG_LAST (1ULL << (64 - 2)) 37 #define PFN_DEV (1ULL << (64 - 3)) 38 #define PFN_MAP (1ULL << (64 - 4)) 39 40 static inline pfn_t 41 __pfn_to_pfn_t(unsigned long pfn, u64 flags) 42 { 43 pfn_t pfn_t = { pfn | (flags & PFN_FLAGS_MASK) }; 44 45 return (pfn_t); 46 } 47 48 static inline pfn_t 49 pfn_to_pfn_t(unsigned long pfn) 50 { 51 return (__pfn_to_pfn_t (pfn, 0)); 52 } 53 54 #endif /* _LINUXKPI_LINUX_PFN_T_H_ */ 55