libcfs/include/libcfs/linux/kp30.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  */
   4 #ifndef __LIBCFS_LINUX_KP30_H__
   5 #define __LIBCFS_LINUX_KP30_H__
   6
   7 #ifndef __LIBCFS_KP30_H__
   8 #error Do not #include this file directly. #include <libcfs/libcfs.h> instead
   9 #endif
  10
  11 #ifdef __KERNEL__
  12 #ifndef AUTOCONF_INCLUDED
  13 # include <linux/config.h>
  14 #endif
  15 # include <linux/kernel.h>
  16 # include <linux/mm.h>
  17 # include <linux/string.h>
  18 # include <linux/stat.h>
  19 # include <linux/init.h>
  20 # include <linux/errno.h>
  21 # include <linux/unistd.h>
  22 # include <asm/system.h>
  23 # include <linux/kmod.h>
  24 # include <linux/notifier.h>
  25 # include <linux/fs.h>
  26 # include <linux/miscdevice.h>
  27 # include <linux/vmalloc.h>
  28 # include <linux/time.h>
  29 # include <linux/slab.h>
  30 # include <linux/interrupt.h>
  31 # include <linux/highmem.h>
  32 # include <linux/module.h>
  33 # include <linux/version.h>
  34 # include <linux/smp_lock.h>
  35 # include <asm/atomic.h>
  36 # include <asm/uaccess.h>
  37 # include <linux/rwsem.h>
  38 # include <linux/proc_fs.h>
  39 # include <linux/file.h>
  40 # include <linux/smp.h>
  41 # include <linux/ctype.h>
  42 # include <linux/compiler.h>
  43 # ifdef HAVE_MM_INLINE
  44 #  include <linux/mm_inline.h>
  45 # endif
  46 # if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
  47 #  include <linux/kallsyms.h>
  48 #  include <linux/moduleparam.h>
  49 # endif
  50
  51 #include <libcfs/linux/portals_compat25.h>
  52
  53 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
  54 #define schedule_work schedule_task
  55 #define prepare_work(wq,cb,cbdata)                                            \
  56 do {                                                                          \
  57         INIT_TQUEUE((wq), 0, 0);                                              \
  58         PREPARE_TQUEUE((wq), (cb), (cbdata));                                 \
  59 } while (0)
  60
  61 #define PageUptodate Page_Uptodate
  62 #define our_recalc_sigpending(current) recalc_sigpending(current)
  63 #define num_online_cpus() smp_num_cpus
  64 static inline void our_cond_resched(void)
  65 {
  66         if (current->need_resched)
  67                schedule ();
  68 }
  69 #define work_struct_t                   struct tq_struct
  70 #define cfs_get_work_data(type,field,data)   (data)
  71 #else
  72
  73 #ifdef HAVE_3ARGS_INIT_WORK
  74
  75 #define prepare_work(wq,cb,cbdata)                                            \
  76 do {                                                                          \
  77         INIT_WORK((wq), (void *)(cb), (void *)(cbdata));                      \
  78 } while (0)
  79
  80 #define cfs_get_work_data(type,field,data)   (data)
  81
  82 #else
  83
  84 #define prepare_work(wq,cb,cbdata)                                            \
  85 do {                                                                          \
  86         INIT_WORK((wq), (void *)(cb));                                        \
  87 } while (0)
  88
  89 #define cfs_get_work_data(type,field,data) container_of(data,type,field)
  90
  91 #endif
  92
  93 #define wait_on_page wait_on_page_locked
  94 #define our_recalc_sigpending(current) recalc_sigpending()
  95 #define strtok(a,b) strpbrk(a, b)
  96 static inline void our_cond_resched(void)
  97 {
  98         cond_resched();
  99 }
 100 #define work_struct_t      struct work_struct
 101
 102 #endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) */
 103
 104 #ifdef CONFIG_SMP
 105 #define LASSERT_SPIN_LOCKED(lock) LASSERT(spin_is_locked(lock))
 106 #else
 107 #define LASSERT_SPIN_LOCKED(lock) do {} while(0)
 108 #endif
 109 #define LASSERT_SEM_LOCKED(sem) LASSERT(down_trylock(sem) != 0)
 110
 111 #define LIBCFS_PANIC(msg)            panic(msg)
 112
 113 /* ------------------------------------------------------------------- */
 114
 115 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 116
 117 #define PORTAL_SYMBOL_REGISTER(x) inter_module_register(#x, THIS_MODULE, &x)
 118 #define PORTAL_SYMBOL_UNREGISTER(x) inter_module_unregister(#x)
 119
 120 #define PORTAL_SYMBOL_GET(x) ((typeof(&x))inter_module_get(#x))
 121 #define PORTAL_SYMBOL_PUT(x) inter_module_put(#x)
 122
 123 #define PORTAL_MODULE_USE       MOD_INC_USE_COUNT
 124 #define PORTAL_MODULE_UNUSE     MOD_DEC_USE_COUNT
 125 #else
 126
 127 #define PORTAL_SYMBOL_REGISTER(x)
 128 #define PORTAL_SYMBOL_UNREGISTER(x)
 129
 130 #define PORTAL_SYMBOL_GET(x) symbol_get(x)
 131 #define PORTAL_SYMBOL_PUT(x) symbol_put(x)
 132
 133 #define PORTAL_MODULE_USE       try_module_get(THIS_MODULE)
 134 #define PORTAL_MODULE_UNUSE     module_put(THIS_MODULE)
 135
 136 #endif
 137
 138 /******************************************************************************/
 139 /* Module parameter support */
 140 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 141 # define CFS_MODULE_PARM(name, t, type, perm, desc) \
 142         MODULE_PARM(name, t);\
 143         MODULE_PARM_DESC(name, desc)
 144
 145 #else
 146 # define CFS_MODULE_PARM(name, t, type, perm, desc) \
 147         module_param(name, type, perm);\
 148         MODULE_PARM_DESC(name, desc)
 149 #endif
 150
 151 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,9))
 152 # define CFS_SYSFS_MODULE_PARM  0 /* no sysfs module parameters */
 153 #else
 154 # define CFS_SYSFS_MODULE_PARM  1 /* module parameters accessible via sysfs */
 155 #endif
 156 /******************************************************************************/
 157
 158 #if (__GNUC__)
 159 /* Use the special GNU C __attribute__ hack to have the compiler check the
 160  * printf style argument string against the actual argument count and
 161  * types.
 162  */
 163 #ifdef printf
 164 # warning printf has been defined as a macro...
 165 # undef printf
 166 #endif
 167
 168 #endif /* __GNUC__ */
 169
 170 # define fprintf(a, format, b...) CDEBUG(D_OTHER, format , ## b)
 171 # define printf(format, b...) CDEBUG(D_OTHER, format , ## b)
 172 # define time(a) CURRENT_TIME
 173
 174 #ifndef num_possible_cpus
 175 #define num_possible_cpus() NR_CPUS
 176 #endif
 177 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
 178 #define i_size_read(a) ((a)->i_size)
 179 #endif
 180
 181 #else  /* !__KERNEL__ */
 182 # include <stdio.h>
 183 # include <stdlib.h>
 184 #if defined(__CYGWIN__)
 185 # include <cygwin-ioctl.h>
 186 #else
 187 # include <stdint.h>
 188 #endif
 189 # include <unistd.h>
 190 # include <time.h>
 191 # include <limits.h>
 192 # include <errno.h>
 193 # include <sys/ioctl.h>                         /* for _IOWR */
 194 #ifndef _IOWR
 195 #include "ioctl.h"
 196 #endif
 197
 198 # define CFS_MODULE_PARM(name, t, type, perm, desc)
 199 #define PORTAL_SYMBOL_GET(x) inter_module_get(#x)
 200 #define PORTAL_SYMBOL_PUT(x) inter_module_put(#x)
 201
 202 #endif /* End of !__KERNEL__ */
 203
 204 /******************************************************************************/
 205 /* Light-weight trace
 206  * Support for temporary event tracing with minimal Heisenberg effect. */
 207 #define LWT_SUPPORT  0
 208
 209 #define LWT_MEMORY   (16<<20)
 210
 211 #ifndef KLWT_SUPPORT
 212 # if defined(__KERNEL__)
 213 #  if !defined(BITS_PER_LONG)
 214 #   error "BITS_PER_LONG not defined"
 215 #  endif
 216 # elif !defined(__WORDSIZE)
 217 #  error "__WORDSIZE not defined"
 218 # else
 219 #  define BITS_PER_LONG __WORDSIZE
 220 # endif
 221
 222 /* kernel hasn't defined this? */
 223 typedef struct {
 224         long long   lwte_when;
 225         char       *lwte_where;
 226         void       *lwte_task;
 227         long        lwte_p1;
 228         long        lwte_p2;
 229         long        lwte_p3;
 230         long        lwte_p4;
 231 # if BITS_PER_LONG > 32
 232         long        lwte_pad;
 233 # endif
 234 } lwt_event_t;
 235 #endif /* !KLWT_SUPPORT */
 236
 237 #if LWT_SUPPORT
 238 # ifdef __KERNEL__
 239 #  if !KLWT_SUPPORT
 240
 241 typedef struct _lwt_page {
 242         struct list_head     lwtp_list;
 243         struct page         *lwtp_page;
 244         lwt_event_t         *lwtp_events;
 245 } lwt_page_t;
 246
 247 typedef struct {
 248         int                lwtc_current_index;
 249         lwt_page_t        *lwtc_current_page;
 250 } lwt_cpu_t;
 251
 252 extern int       lwt_enabled;
 253 extern lwt_cpu_t lwt_cpus[];
 254
 255 /* Note that we _don't_ define LWT_EVENT at all if LWT_SUPPORT isn't set.
 256  * This stuff is meant for finding specific problems; it never stays in
 257  * production code... */
 258
 259 #define LWTSTR(n)       #n
 260 #define LWTWHERE(f,l)   f ":" LWTSTR(l)
 261 #define LWT_EVENTS_PER_PAGE (CFS_PAGE_SIZE / sizeof (lwt_event_t))
 262
 263 #define LWT_EVENT(p1, p2, p3, p4)                                       \
 264 do {                                                                    \
 265         unsigned long    flags;                                         \
 266         lwt_cpu_t       *cpu;                                           \
 267         lwt_page_t      *p;                                             \
 268         lwt_event_t     *e;                                             \
 269                                                                         \
 270         if (lwt_enabled) {                                              \
 271                 local_irq_save (flags);                                 \
 272                                                                         \
 273                 cpu = &lwt_cpus[smp_processor_id()];                    \
 274                 p = cpu->lwtc_current_page;                             \
 275                 e = &p->lwtp_events[cpu->lwtc_current_index++];         \
 276                                                                         \
 277                 if (cpu->lwtc_current_index >= LWT_EVENTS_PER_PAGE) {   \
 278                         cpu->lwtc_current_page =                        \
 279                                 list_entry (p->lwtp_list.next,          \
 280                                             lwt_page_t, lwtp_list);     \
 281                         cpu->lwtc_current_index = 0;                    \
 282                 }                                                       \
 283                                                                         \
 284                 e->lwte_when  = get_cycles();                           \
 285                 e->lwte_where = LWTWHERE(__FILE__,__LINE__);            \
 286                 e->lwte_task  = current;                                \
 287                 e->lwte_p1    = (long)(p1);                             \
 288                 e->lwte_p2    = (long)(p2);                             \
 289                 e->lwte_p3    = (long)(p3);                             \
 290                 e->lwte_p4    = (long)(p4);                             \
 291                                                                         \
 292                 local_irq_restore (flags);                              \
 293         }                                                               \
 294 } while (0)
 295
 296 #endif /* !KLWT_SUPPORT */
 297
 298 extern int  lwt_init (void);
 299 extern void lwt_fini (void);
 300 extern int  lwt_lookup_string (int *size, char *knlptr,
 301                                char *usrptr, int usrsize);
 302 extern int  lwt_control (int enable, int clear);
 303 extern int  lwt_snapshot (cycles_t *now, int *ncpu, int *total_size,
 304                           void *user_ptr, int user_size);
 305 # else  /* __KERNEL__ */
 306 #  define LWT_EVENT(p1,p2,p3,p4)     /* no userland implementation yet */
 307 # endif /* __KERNEL__ */
 308 #endif /* LWT_SUPPORT */
 309
 310 /* ------------------------------------------------------------------ */
 311
 312 #define IOCTL_LIBCFS_TYPE long
 313
 314 #ifdef __CYGWIN__
 315 # ifndef BITS_PER_LONG
 316 #  if (~0UL) == 0xffffffffUL
 317 #   define BITS_PER_LONG 32
 318 #  else
 319 #   define BITS_PER_LONG 64
 320 #  endif
 321 # endif
 322 #endif
 323
 324 #if BITS_PER_LONG > 32
 325 # define LI_POISON ((int)0x5a5a5a5a5a5a5a5a)
 326 # define LL_POISON ((long)0x5a5a5a5a5a5a5a5a)
 327 # define LP_POISON ((void *)(long)0x5a5a5a5a5a5a5a5a)
 328 #else
 329 # define LI_POISON ((int)0x5a5a5a5a)
 330 # define LL_POISON ((long)0x5a5a5a5a)
 331 # define LP_POISON ((void *)(long)0x5a5a5a5a)
 332 #endif
 333
 334 /* this is a bit chunky */
 335
 336 #if defined(__KERNEL__)
 337  #define _LWORDSIZE BITS_PER_LONG
 338 #else
 339  #define _LWORDSIZE __WORDSIZE
 340 #endif
 341
 342 #if (defined(__x86_64__) && (defined(__KERNEL__) || defined(CRAY_XT3))) || defined(HAVE_U64_LONG_LONG)
 343 /* x86_64 defines __u64 as "long" in userspace, but "long long" in the kernel */
 344 # define LPU64 "%Lu"
 345 # define LPD64 "%Ld"
 346 # define LPX64 "%#Lx"
 347 # define LPF64 "L"
 348 #elif (_LWORDSIZE == 32)
 349 # define LPU64 "%Lu"
 350 # define LPD64 "%Ld"
 351 # define LPX64 "%#Lx"
 352 # define LPF64 "L"
 353 #elif (_LWORDSIZE == 64)
 354 # define LPU64 "%lu"
 355 # define LPD64 "%ld"
 356 # define LPX64 "%#lx"
 357 # define LPF64 "l"
 358 #endif
 359
 360 #ifdef HAVE_SIZE_T_LONG
 361 # define LPSZ  "%lu"
 362 #else
 363 # define LPSZ  "%u"
 364 #endif
 365
 366 #ifdef HAVE_SSIZE_T_LONG
 367 # define LPSSZ "%ld"
 368 #else
 369 # define LPSSZ "%d"
 370 #endif
 371
 372 #ifndef LPU64
 373 # error "No word size defined"
 374 #endif
 375
 376 #undef _LWORDSIZE
 377
 378 #endif