drivers/staging/lustre/include/linux/libcfs/linux/kp30.h

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #ifndef __LIBCFS_LINUX_KP30_H__
  38 #define __LIBCFS_LINUX_KP30_H__
  39
  40
  41 #include <linux/kernel.h>
  42 #include <linux/mm.h>
  43 #include <linux/string.h>
  44 #include <linux/stat.h>
  45 #include <linux/init.h>
  46 #include <linux/errno.h>
  47 #include <linux/unistd.h>
  48 #include <linux/kmod.h>
  49 #include <linux/notifier.h>
  50 #include <linux/fs.h>
  51 #include <linux/miscdevice.h>
  52 #include <linux/vmalloc.h>
  53 #include <linux/time.h>
  54 #include <linux/slab.h>
  55 #include <linux/interrupt.h>
  56 #include <linux/highmem.h>
  57 #include <linux/module.h>
  58 #include <asm/atomic.h>
  59 #include <asm/uaccess.h>
  60 #include <linux/rwsem.h>
  61 #include <linux/proc_fs.h>
  62 #include <linux/file.h>
  63 #include <linux/smp.h>
  64 #include <linux/ctype.h>
  65 #include <linux/compiler.h>
  66 #include <linux/mm_inline.h>
  67 #include <linux/kallsyms.h>
  68 #include <linux/moduleparam.h>
  69 #include <linux/scatterlist.h>
  70
  71 #include <linux/libcfs/linux/portals_compat25.h>
  72
  73
  74 /******************************************************************************/
  75 /* Module parameter support */
  76 #define CFS_MODULE_PARM(name, t, type, perm, desc) \
  77         module_param(name, type, perm);\
  78         MODULE_PARM_DESC(name, desc)
  79
  80 /******************************************************************************/
  81 /* Light-weight trace
  82  * Support for temporary event tracing with minimal Heisenberg effect. */
  83 #define LWT_SUPPORT  0
  84
  85 #define LWT_MEMORY   (16<<20)
  86
  87 #ifndef KLWT_SUPPORT
  88 #  if !defined(BITS_PER_LONG)
  89 #   error "BITS_PER_LONG not defined"
  90 #  endif
  91
  92 /* kernel hasn't defined this? */
  93 typedef struct {
  94         long long   lwte_when;
  95         char       *lwte_where;
  96         void       *lwte_task;
  97         long    lwte_p1;
  98         long    lwte_p2;
  99         long    lwte_p3;
 100         long    lwte_p4;
 101 # if BITS_PER_LONG > 32
 102         long    lwte_pad;
 103 # endif
 104 } lwt_event_t;
 105 #endif /* !KLWT_SUPPORT */
 106
 107 #if LWT_SUPPORT
 108 #  if !KLWT_SUPPORT
 109
 110 typedef struct _lwt_page {
 111         struct list_head               lwtp_list;
 112         struct page          *lwtp_page;
 113         lwt_event_t          *lwtp_events;
 114 } lwt_page_t;
 115
 116 typedef struct {
 117         int             lwtc_current_index;
 118         lwt_page_t      *lwtc_current_page;
 119 } lwt_cpu_t;
 120
 121 extern int       lwt_enabled;
 122 extern lwt_cpu_t lwt_cpus[];
 123
 124 /* Note that we _don't_ define LWT_EVENT at all if LWT_SUPPORT isn't set.
 125  * This stuff is meant for finding specific problems; it never stays in
 126  * production code... */
 127
 128 #define LWTSTR(n)       #n
 129 #define LWTWHERE(f,l)   f ":" LWTSTR(l)
 130 #define LWT_EVENTS_PER_PAGE (PAGE_CACHE_SIZE / sizeof (lwt_event_t))
 131
 132 #define LWT_EVENT(p1, p2, p3, p4)                                      \
 133 do {                                                                \
 134         unsigned long    flags;                                  \
 135         lwt_cpu_t       *cpu;                                      \
 136         lwt_page_t      *p;                                          \
 137         lwt_event_t     *e;                                          \
 138                                                                         \
 139         if (lwt_enabled) {                                            \
 140                 local_irq_save (flags);                          \
 141                                                                         \
 142                 cpu = &lwt_cpus[smp_processor_id()];                \
 143                 p = cpu->lwtc_current_page;                          \
 144                 e = &p->lwtp_events[cpu->lwtc_current_index++];  \
 145                                                                         \
 146                 if (cpu->lwtc_current_index >= LWT_EVENTS_PER_PAGE) {   \
 147                         cpu->lwtc_current_page =                        \
 148                                 list_entry (p->lwtp_list.next,      \
 149                                                 lwt_page_t, lwtp_list); \
 150                         cpu->lwtc_current_index = 0;                \
 151                 }                                                      \
 152                                                                         \
 153                 e->lwte_when  = get_cycles();                      \
 154                 e->lwte_where = LWTWHERE(__FILE__,__LINE__);        \
 155                 e->lwte_task  = current;                                \
 156                 e->lwte_p1    = (long)(p1);                          \
 157                 e->lwte_p2    = (long)(p2);                          \
 158                 e->lwte_p3    = (long)(p3);                          \
 159                 e->lwte_p4    = (long)(p4);                          \
 160                                                                         \
 161                 local_irq_restore (flags);                            \
 162         }                                                              \
 163 } while (0)
 164
 165 #endif /* !KLWT_SUPPORT */
 166
 167 extern int  lwt_init (void);
 168 extern void lwt_fini (void);
 169 extern int  lwt_lookup_string (int *size, char *knlptr,
 170                                char *usrptr, int usrsize);
 171 extern int  lwt_control (int enable, int clear);
 172 extern int  lwt_snapshot (cfs_cycles_t *now, int *ncpu, int *total_size,
 173                           void *user_ptr, int user_size);
 174 #endif /* LWT_SUPPORT */
 175
 176 /* ------------------------------------------------------------------ */
 177
 178 # define LI_POISON 0x5a5a5a5a
 179 #if BITS_PER_LONG > 32
 180 # define LL_POISON 0x5a5a5a5a5a5a5a5aL
 181 #else
 182 # define LL_POISON 0x5a5a5a5aL
 183 #endif
 184 # define LP_POISON ((void *)LL_POISON)
 185
 186 /* this is a bit chunky */
 187
 188 # define LPU64 "%llu"
 189 # define LPD64 "%lld"
 190 # define LPX64 "%#llx"
 191 # define LPX64i "%llx"
 192 # define LPO64 "%#llo"
 193 # define LPF64 "L"
 194
 195 /*
 196  * long_ptr_t & ulong_ptr_t, same to "long" for gcc
 197  */
 198 # define LPLU "%lu"
 199 # define LPLD "%ld"
 200 # define LPLX "%#lx"
 201
 202 /*
 203  * pid_t
 204  */
 205 # define LPPID "%d"
 206
 207 #endif