1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013-2016 Mellanox Technologies, Ltd. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 #ifndef _LINUXKPI_LINUX_PAGE_H_ 30 #define _LINUXKPI_LINUX_PAGE_H_ 31 32 #include <linux/types.h> 33 34 #include <sys/param.h> 35 #include <sys/vmmeter.h> 36 37 #include <machine/atomic.h> 38 #include <vm/vm.h> 39 #include <vm/vm_page.h> 40 #include <vm/pmap.h> 41 42 #if defined(__i386__) || defined(__amd64__) 43 #include <machine/md_var.h> 44 #endif 45 46 typedef unsigned long linux_pte_t; 47 typedef unsigned long linux_pmd_t; 48 typedef unsigned long linux_pgd_t; 49 typedef unsigned long pgprot_t; 50 51 #define page vm_page 52 53 #define LINUXKPI_PROT_VALID (1 << 3) 54 #define LINUXKPI_CACHE_MODE_SHIFT 4 55 56 CTASSERT((VM_PROT_ALL & -LINUXKPI_PROT_VALID) == 0); 57 58 #define PAGE_KERNEL_IO 0x0000 59 60 static inline pgprot_t 61 cachemode2protval(vm_memattr_t attr) 62 { 63 return ((attr << LINUXKPI_CACHE_MODE_SHIFT) | LINUXKPI_PROT_VALID); 64 } 65 66 static inline vm_memattr_t 67 pgprot2cachemode(pgprot_t prot) 68 { 69 if (prot & LINUXKPI_PROT_VALID) 70 return (prot >> LINUXKPI_CACHE_MODE_SHIFT); 71 else 72 return (VM_MEMATTR_DEFAULT); 73 } 74 75 #define virt_to_page(x) PHYS_TO_VM_PAGE(vtophys(x)) 76 #define page_to_pfn(pp) (VM_PAGE_TO_PHYS(pp) >> PAGE_SHIFT) 77 #define pfn_to_page(pfn) (PHYS_TO_VM_PAGE((pfn) << PAGE_SHIFT)) 78 #define nth_page(page,n) pfn_to_page(page_to_pfn(page) + (n)) 79 #define page_to_phys(page) VM_PAGE_TO_PHYS(page) 80 81 #define clear_page(page) memset(page, 0, PAGE_SIZE) 82 #define pgprot_noncached(prot) \ 83 (((prot) & VM_PROT_ALL) | cachemode2protval(VM_MEMATTR_UNCACHEABLE)) 84 #ifdef VM_MEMATTR_WRITE_COMBINING 85 #define pgprot_writecombine(prot) \ 86 (((prot) & VM_PROT_ALL) | cachemode2protval(VM_MEMATTR_WRITE_COMBINING)) 87 #else 88 #define pgprot_writecombine(prot) pgprot_noncached(prot) 89 #endif 90 91 #undef PAGE_MASK 92 #define PAGE_MASK (~(PAGE_SIZE-1)) 93 /* 94 * Modifying PAGE_MASK in the above way breaks trunc_page, round_page, 95 * and btoc macros. Therefore, redefine them in a way that makes sense 96 * so the LinuxKPI consumers don't get totally broken behavior. 97 */ 98 #undef btoc 99 #define btoc(x) (((vm_offset_t)(x) + PAGE_SIZE - 1) >> PAGE_SHIFT) 100 #undef round_page 101 #define round_page(x) ((((uintptr_t)(x)) + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1)) 102 #undef trunc_page 103 #define trunc_page(x) ((uintptr_t)(x) & ~(PAGE_SIZE - 1)) 104 105 #if defined(__i386__) || defined(__amd64__) 106 #undef clflush 107 #undef clflushopt 108 static inline void 109 lkpi_clflushopt(unsigned long addr) 110 { 111 if (cpu_stdext_feature & CPUID_STDEXT_CLFLUSHOPT) 112 clflushopt(addr); 113 else if (cpu_feature & CPUID_CLFSH) 114 clflush(addr); 115 else 116 pmap_invalidate_cache(); 117 } 118 #define clflush(x) clflush((unsigned long)(x)) 119 #define clflushopt(x) lkpi_clflushopt((unsigned long)(x)) 120 121 static inline void 122 clflush_cache_range(void *addr, unsigned int size) 123 { 124 pmap_force_invalidate_cache_range((vm_offset_t)addr, 125 (vm_offset_t)addr + size); 126 } 127 #endif 128 129 #endif /* _LINUXKPI_LINUX_PAGE_H_ */ 130