1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * libcfs/include/libcfs/winnt/winnt-mem.h
38 * Basic library routines of memory manipulation routines.
41 #ifndef __LIBCFS_WINNT_CFS_MEM_H__
42 #define __LIBCFS_WINNT_CFS_MEM_H__
44 #ifndef __LIBCFS_LIBCFS_H__
45 #error Do not #include this file directly. #include <libcfs/libcfs.h> instead
48 #include <libcfs/winnt/portals_utils.h>
52 typedef struct cfs_mem_cache cfs_mem_cache_t;
58 #define CFS_PAGE_SIZE PAGE_SIZE
59 #define CFS_PAGE_SHIFT PAGE_SHIFT
60 #define CFS_PAGE_MASK (~(PAGE_SIZE - 1))
62 typedef struct cfs_page {
74 #define page_private(page) ((page)->private)
75 #define set_page_private(page, v) ((page)->private = (v))
78 #define page_count(page) (0)
80 #define PG_locked 0 /* Page is locked. Don't touch. */
82 #define PG_referenced 2
88 #define PG_slab 7 /* slab debug (Suparna wants this) */
90 #define PG_owner_priv_1 8 /* Owner use. If pagecache, fs may use*/
92 #define PG_reserved 10
93 #define PG_private 11 /* If pagecache, has fs-private data */
95 #define PG_writeback 12 /* Page is under writeback */
96 #define PG_compound 14 /* Part of a compound page */
97 #define PG_swapcache 15 /* Swap page: swp_entry_t in private */
99 #define PG_mappedtodisk 16 /* Has blocks allocated on-disk */
100 #define PG_reclaim 17 /* To be reclaimed asap */
101 #define PG_buddy 19 /* Page is free, on buddy lists */
103 #define PG_virt 31 /* addr is not */
105 #ifndef arch_set_page_uptodate
106 #define arch_set_page_uptodate(page)
109 /* Make it prettier to test the above... */
110 #define UnlockPage(page) unlock_page(page)
111 #define Page_Uptodate(page) cfs_test_bit(PG_uptodate, &(page)->flags)
112 #define SetPageUptodate(page) \
114 arch_set_page_uptodate(page); \
115 cfs_set_bit(PG_uptodate, &(page)->flags); \
117 #define ClearPageUptodate(page) cfs_clear_bit(PG_uptodate, &(page)->flags)
118 #define PageDirty(page) cfs_test_bit(PG_dirty, &(page)->flags)
119 #define SetPageDirty(page) cfs_set_bit(PG_dirty, &(page)->flags)
120 #define ClearPageDirty(page) cfs_clear_bit(PG_dirty, &(page)->flags)
121 #define PageLocked(page) cfs_test_bit(PG_locked, &(page)->flags)
122 #define LockPage(page) cfs_set_bit(PG_locked, &(page)->flags)
123 #define TryLockPage(page) cfs_test_and_set_bit(PG_locked, &(page)->flags)
124 #define PageChecked(page) cfs_test_bit(PG_checked, &(page)->flags)
125 #define SetPageChecked(page) cfs_set_bit(PG_checked, &(page)->flags)
126 #define ClearPageChecked(page) cfs_clear_bit(PG_checked, &(page)->flags)
127 #define PageLaunder(page) cfs_test_bit(PG_launder, &(page)->flags)
128 #define SetPageLaunder(page) cfs_set_bit(PG_launder, &(page)->flags)
129 #define ClearPageLaunder(page) cfs_clear_bit(PG_launder, &(page)->flags)
130 #define ClearPageArch1(page) cfs_clear_bit(PG_arch_1, &(page)->flags)
132 #define PageError(page) cfs_test_bit(PG_error, &(page)->flags)
133 #define SetPageError(page) cfs_set_bit(PG_error, &(page)->flags)
134 #define ClearPageError(page) cfs_clear_bit(PG_error, &(page)->flags)
135 #define PageReferenced(page) cfs_test_bit(PG_referenced, &(page)->flags)
136 #define SetPageReferenced(page) cfs_set_bit(PG_referenced, &(page)->flags)
137 #define ClearPageReferenced(page) cfs_clear_bit(PG_referenced, &(page)->flags)
139 #define PageActive(page) cfs_test_bit(PG_active, &(page)->flags)
140 #define SetPageActive(page) cfs_set_bit(PG_active, &(page)->flags)
141 #define ClearPageActive(page) cfs_clear_bit(PG_active, &(page)->flags)
143 #define PageWriteback(page) cfs_test_bit(PG_writeback, &(page)->flags)
144 #define TestSetPageWriteback(page) cfs_test_and_set_bit(PG_writeback, \
146 #define TestClearPageWriteback(page) cfs_test_and_clear_bit(PG_writeback, \
150 #define GFP_KERNEL (2)
151 #define GFP_ATOMIC (4)
153 cfs_page_t *cfs_alloc_page(int flags);
154 void cfs_free_page(cfs_page_t *pg);
155 void cfs_release_page(cfs_page_t *pg);
156 cfs_page_t * virt_to_page(void * addr);
157 int cfs_mem_is_in_cache(const void *addr, const cfs_mem_cache_t *kmem);
159 #define page_cache_get(a) do {} while (0)
160 #define page_cache_release(a) do {} while (0)
162 static inline void *cfs_page_address(cfs_page_t *page)
167 static inline void *cfs_kmap(cfs_page_t *page)
172 static inline void cfs_kunmap(cfs_page_t *page)
177 static inline void cfs_get_page(cfs_page_t *page)
179 cfs_atomic_inc(&page->count);
182 static inline void cfs_put_page(cfs_page_t *page)
184 cfs_atomic_dec(&page->count);
187 static inline int cfs_page_count(cfs_page_t *page)
189 return cfs_atomic_read(&page->count);
192 #define cfs_page_index(p) ((p)->index)
198 #define CFS_ALLOC_ATOMIC_TRY (0)
199 extern void *cfs_alloc(size_t nr_bytes, u_int32_t flags);
200 extern void cfs_free(void *addr);
202 #define kmalloc cfs_alloc
204 extern void *cfs_alloc_large(size_t nr_bytes);
205 extern void cfs_free_large(void *addr);
211 #define CFS_SLAB_HWCACHE_ALIGN 0
213 /* The cache name is limited to 20 chars */
215 struct cfs_mem_cache {
218 NPAGED_LOOKASIDE_LIST npll;
222 extern cfs_mem_cache_t *cfs_mem_cache_create (const char *, size_t, size_t,
224 extern int cfs_mem_cache_destroy (cfs_mem_cache_t * );
225 extern void *cfs_mem_cache_alloc (cfs_mem_cache_t *, int);
226 extern void cfs_mem_cache_free (cfs_mem_cache_t *, void *);
231 typedef int (*shrink_callback)(int nr_to_scan, gfp_t gfp_mask);
232 struct cfs_shrinker {
234 int seeks; /* seeks to recreate an obj */
236 /* These are for internal use */
238 long nr; /* objs pending delete */
241 struct cfs_shrinker *cfs_set_shrinker(int seeks, shrink_callback cb);
242 void cfs_remove_shrinker(struct cfs_shrinker *s);
244 int start_shrinker_timer();
245 void stop_shrinker_timer();
248 * Page allocator slabs
251 extern cfs_mem_cache_t *cfs_page_t_slab;
252 extern cfs_mem_cache_t *cfs_page_p_slab;
255 #define CFS_DECL_MMSPACE
256 #define CFS_MMSPACE_OPEN do {} while(0)
257 #define CFS_MMSPACE_CLOSE do {} while(0)
260 #define cfs_mb() do {} while(0)
261 #define rmb() cfs_mb()
262 #define wmb() cfs_mb()
265 * MM defintions from (linux/mm.h)
268 #define CFS_DEFAULT_SEEKS 2 /* shrink seek */
270 #else /* !__KERNEL__ */
272 #include "../user-mem.h"
274 /* page alignmed buffer allocation */
275 void* pgalloc(size_t factor);
276 void pgfree(void * page);
278 #endif /* __KERNEL__ */
280 #endif /* __WINNT_CFS_MEM_H__ */