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
cachemode2protval(vm_memattr_t attr)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
pgprot2cachemode(pgprot_t prot)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 page_to_virt(page) linux_page_address(page)
76 #define virt_to_page(x) PHYS_TO_VM_PAGE(vtophys(x))
77 #define page_to_pfn(pp) (VM_PAGE_TO_PHYS(pp) >> PAGE_SHIFT)
78 #define pfn_to_page(pfn) (PHYS_TO_VM_PAGE((pfn) << PAGE_SHIFT))
79 #define nth_page(page,n) pfn_to_page(page_to_pfn(page) + (n))
80 #define page_to_phys(page) VM_PAGE_TO_PHYS(page)
81
82 #define clear_page(page) memset(page, 0, PAGE_SIZE)
83 #define pgprot_noncached(prot) \
84 (((prot) & VM_PROT_ALL) | cachemode2protval(VM_MEMATTR_UNCACHEABLE))
85 #ifdef VM_MEMATTR_WRITE_COMBINING
86 #define pgprot_writecombine(prot) \
87 (((prot) & VM_PROT_ALL) | cachemode2protval(VM_MEMATTR_WRITE_COMBINING))
88 #else
89 #define pgprot_writecombine(prot) pgprot_noncached(prot)
90 #endif
91
92 #undef PAGE_MASK
93 #define PAGE_MASK (~(PAGE_SIZE-1))
94 /*
95 * Modifying PAGE_MASK in the above way breaks trunc_page, round_page,
96 * and btoc macros. Therefore, redefine them in a way that makes sense
97 * so the LinuxKPI consumers don't get totally broken behavior.
98 */
99 #undef btoc
100 #define btoc(x) (((vm_offset_t)(x) + PAGE_SIZE - 1) >> PAGE_SHIFT)
101 #undef round_page
102 #define round_page(x) ((((uintptr_t)(x)) + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))
103 #undef trunc_page
104 #define trunc_page(x) ((uintptr_t)(x) & ~(PAGE_SIZE - 1))
105
106 #if defined(__i386__) || defined(__amd64__)
107 #undef clflush
108 #undef clflushopt
109 static inline void
lkpi_clflushopt(unsigned long addr)110 lkpi_clflushopt(unsigned long addr)
111 {
112 if (cpu_stdext_feature & CPUID_STDEXT_CLFLUSHOPT)
113 clflushopt(addr);
114 else if (cpu_feature & CPUID_CLFSH)
115 clflush(addr);
116 else
117 pmap_invalidate_cache();
118 }
119 #define clflush(x) clflush((unsigned long)(x))
120 #define clflushopt(x) lkpi_clflushopt((unsigned long)(x))
121
122 static inline void
clflush_cache_range(void * addr,unsigned int size)123 clflush_cache_range(void *addr, unsigned int size)
124 {
125 pmap_force_invalidate_cache_range((vm_offset_t)addr,
126 (vm_offset_t)addr + size);
127 }
128 #endif
129
130 #endif /* _LINUXKPI_LINUX_PAGE_H_ */
131