lnet/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/kp30.h> instead
   9 #endif
  10
  11 #ifdef __KERNEL__
  12 #ifdef HAVE_KERNEL_CONFIG_H
  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 <asm/segment.h>
  27 # include <linux/miscdevice.h>
  28 # include <linux/vmalloc.h>
  29 # include <linux/time.h>
  30 # include <linux/slab.h>
  31 # include <linux/interrupt.h>
  32 # include <linux/highmem.h>
  33 # include <linux/module.h>
  34 # include <linux/version.h>
  35 # include <lnet/lnet.h>
  36 # include <linux/smp_lock.h>
  37 # include <asm/atomic.h>
  38 # include <asm/uaccess.h>
  39 # include <linux/rwsem.h>
  40 # include <linux/proc_fs.h>
  41 # include <linux/file.h>
  42 # include <linux/smp.h>
  43 # include <linux/ctype.h>
  44 # include <linux/compiler.h>
  45 # ifdef HAVE_MM_INLINE
  46 #  include <linux/mm_inline.h>
  47 # endif
  48 # if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
  49 #  include <linux/kallsyms.h>
  50 #  include <linux/moduleparam.h>
  51 # endif
  52
  53 #include <libcfs/linux/portals_compat25.h>
  54
  55 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
  56 #define schedule_work schedule_task
  57 #define prepare_work(wq,cb,cbdata)                                            \
  58 do {                                                                          \
  59         INIT_TQUEUE((wq), 0, 0);                                              \
  60         PREPARE_TQUEUE((wq), (cb), (cbdata));                                 \
  61 } while (0)
  62
  63 #define PageUptodate Page_Uptodate
  64 #define our_recalc_sigpending(current) recalc_sigpending(current)
  65 #define num_online_cpus() smp_num_cpus
  66 static inline void our_cond_resched(void)
  67 {
  68         if (current->need_resched)
  69                schedule ();
  70 }
  71 #define work_struct_t       struct tq_struct
  72
  73 #else
  74
  75 #define prepare_work(wq,cb,cbdata)                                            \
  76 do {                                                                          \
  77         INIT_WORK((wq), (void *)(cb), (void *)(cbdata));                      \
  78 } while (0)
  79 #define wait_on_page wait_on_page_locked
  80 #define our_recalc_sigpending(current) recalc_sigpending()
  81 #define strtok(a,b) strpbrk(a, b)
  82 static inline void our_cond_resched(void)
  83 {
  84         cond_resched();
  85 }
  86 #define work_struct_t      struct work_struct
  87
  88 #endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) */
  89
  90 #ifdef CONFIG_SMP
  91 #define LASSERT_SPIN_LOCKED(lock) LASSERT(spin_is_locked(lock))
  92 #else
  93 #define LASSERT_SPIN_LOCKED(lock) do {} while(0)
  94 #endif
  95 #define LASSERT_SEM_LOCKED(sem) LASSERT(down_trylock(sem) != 0)
  96
  97 #define LIBCFS_PANIC(msg)            panic(msg)
  98
  99 /* ------------------------------------------------------------------- */
 100
 101 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 102
 103 #define PORTAL_SYMBOL_REGISTER(x) inter_module_register(#x, THIS_MODULE, &x)
 104 #define PORTAL_SYMBOL_UNREGISTER(x) inter_module_unregister(#x)
 105
 106 #define PORTAL_SYMBOL_GET(x) ((typeof(&x))inter_module_get(#x))
 107 #define PORTAL_SYMBOL_PUT(x) inter_module_put(#x)
 108
 109 #define PORTAL_MODULE_USE       MOD_INC_USE_COUNT
 110 #define PORTAL_MODULE_UNUSE     MOD_DEC_USE_COUNT
 111 #else
 112
 113 #define PORTAL_SYMBOL_REGISTER(x)
 114 #define PORTAL_SYMBOL_UNREGISTER(x)
 115
 116 #define PORTAL_SYMBOL_GET(x) symbol_get(x)
 117 #define PORTAL_SYMBOL_PUT(x) symbol_put(x)
 118
 119 #define PORTAL_MODULE_USE       try_module_get(THIS_MODULE)
 120 #define PORTAL_MODULE_UNUSE     module_put(THIS_MODULE)
 121
 122 #endif
 123
 124 /******************************************************************************/
 125 /* Module parameter support */
 126 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 127 # define CFS_MODULE_PARM(name, t, type, perm, desc) \
 128         MODULE_PARM(name, t);\
 129         MODULE_PARM_DESC(name, desc)
 130
 131 #else
 132 # define CFS_MODULE_PARM(name, t, type, perm, desc) \
 133         module_param(name, type, perm);\
 134         MODULE_PARM_DESC(name, desc)
 135 #endif
 136
 137 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,9))
 138 # define CFS_SYSFS_MODULE_PARM  0 /* no sysfs module parameters */
 139 #else
 140 # define CFS_SYSFS_MODULE_PARM  1 /* module parameters accessible via sysfs */
 141 #endif
 142 /******************************************************************************/
 143
 144 #if (__GNUC__)
 145 /* Use the special GNU C __attribute__ hack to have the compiler check the
 146  * printf style argument string against the actual argument count and
 147  * types.
 148  */
 149 #ifdef printf
 150 # warning printf has been defined as a macro...
 151 # undef printf
 152 #endif
 153
 154 #endif /* __GNUC__ */
 155
 156 # define fprintf(a, format, b...) CDEBUG(D_OTHER, format , ## b)
 157 # define printf(format, b...) CDEBUG(D_OTHER, format , ## b)
 158 # define time(a) CURRENT_TIME
 159
 160 #else  /* !__KERNEL__ */
 161 # include <stdio.h>
 162 # include <stdlib.h>
 163 #ifdef CRAY_XT3
 164 # include <ioctl.h>
 165 #elif defined(__CYGWIN__)
 166 # include <cygwin-ioctl.h>
 167 #else
 168 # include <stdint.h>
 169 #endif
 170 # include <unistd.h>
 171 # include <time.h>
 172 # include <limits.h>
 173 # include <errno.h>
 174 # include <sys/ioctl.h>                         /* for _IOWR */
 175
 176 # define CFS_MODULE_PARM(name, t, type, perm, desc)
 177 #define PORTAL_SYMBOL_GET(x) inter_module_get(#x)
 178 #define PORTAL_SYMBOL_PUT(x) inter_module_put(#x)
 179
 180 #endif /* End of !__KERNEL__ */
 181
 182 /******************************************************************************/
 183 /* Light-weight trace
 184  * Support for temporary event tracing with minimal Heisenberg effect. */
 185 #define LWT_SUPPORT  0
 186
 187 #define LWT_MEMORY   (16<<20)
 188
 189 #ifndef KLWT_SUPPORT
 190 # if defined(__KERNEL__)
 191 #  if !defined(BITS_PER_LONG)
 192 #   error "BITS_PER_LONG not defined"
 193 #  endif
 194 # elif !defined(__WORDSIZE)
 195 #  error "__WORDSIZE not defined"
 196 # else
 197 #  define BITS_PER_LONG __WORDSIZE
 198 # endif
 199
 200 /* kernel hasn't defined this? */
 201 typedef struct {
 202         long long   lwte_when;
 203         char       *lwte_where;
 204         void       *lwte_task;
 205         long        lwte_p1;
 206         long        lwte_p2;
 207         long        lwte_p3;
 208         long        lwte_p4;
 209 # if BITS_PER_LONG > 32
 210         long        lwte_pad;
 211 # endif
 212 } lwt_event_t;
 213 #endif /* !KLWT_SUPPORT */
 214
 215 #if LWT_SUPPORT
 216 # ifdef __KERNEL__
 217 #  if !KLWT_SUPPORT
 218
 219 typedef struct _lwt_page {
 220         struct list_head     lwtp_list;
 221         struct page         *lwtp_page;
 222         lwt_event_t         *lwtp_events;
 223 } lwt_page_t;
 224
 225 typedef struct {
 226         int                lwtc_current_index;
 227         lwt_page_t        *lwtc_current_page;
 228 } lwt_cpu_t;
 229
 230 extern int       lwt_enabled;
 231 extern lwt_cpu_t lwt_cpus[];
 232
 233 /* Note that we _don't_ define LWT_EVENT at all if LWT_SUPPORT isn't set.
 234  * This stuff is meant for finding specific problems; it never stays in
 235  * production code... */
 236
 237 #define LWTSTR(n)       #n
 238 #define LWTWHERE(f,l)   f ":" LWTSTR(l)
 239 #define LWT_EVENTS_PER_PAGE (CFS_PAGE_SIZE / sizeof (lwt_event_t))
 240
 241 #define LWT_EVENT(p1, p2, p3, p4)                                       \
 242 do {                                                                    \
 243         unsigned long    flags;                                         \
 244         lwt_cpu_t       *cpu;                                           \
 245         lwt_page_t      *p;                                             \
 246         lwt_event_t     *e;                                             \
 247                                                                         \
 248         if (lwt_enabled) {                                              \
 249                 local_irq_save (flags);                                 \
 250                                                                         \
 251                 cpu = &lwt_cpus[smp_processor_id()];                    \
 252                 p = cpu->lwtc_current_page;                             \
 253                 e = &p->lwtp_events[cpu->lwtc_current_index++];         \
 254                                                                         \
 255                 if (cpu->lwtc_current_index >= LWT_EVENTS_PER_PAGE) {   \
 256                         cpu->lwtc_current_page =                        \
 257                                 list_entry (p->lwtp_list.next,          \
 258                                             lwt_page_t, lwtp_list);     \
 259                         cpu->lwtc_current_index = 0;                    \
 260                 }                                                       \
 261                                                                         \
 262                 e->lwte_when  = get_cycles();                           \
 263                 e->lwte_where = LWTWHERE(__FILE__,__LINE__);            \
 264                 e->lwte_task  = current;                                \
 265                 e->lwte_p1    = (long)(p1);                             \
 266                 e->lwte_p2    = (long)(p2);                             \
 267                 e->lwte_p3    = (long)(p3);                             \
 268                 e->lwte_p4    = (long)(p4);                             \
 269                                                                         \
 270                 local_irq_restore (flags);                              \
 271         }                                                               \
 272 } while (0)
 273
 274 #endif /* !KLWT_SUPPORT */
 275
 276 extern int  lwt_init (void);
 277 extern void lwt_fini (void);
 278 extern int  lwt_lookup_string (int *size, char *knlptr,
 279                                char *usrptr, int usrsize);
 280 extern int  lwt_control (int enable, int clear);
 281 extern int  lwt_snapshot (cycles_t *now, int *ncpu, int *total_size,
 282                           void *user_ptr, int user_size);
 283 # else  /* __KERNEL__ */
 284 #  define LWT_EVENT(p1,p2,p3,p4)     /* no userland implementation yet */
 285 # endif /* __KERNEL__ */
 286 #endif /* LWT_SUPPORT */
 287
 288 /* ------------------------------------------------------------------ */
 289
 290 #define IOCTL_LIBCFS_TYPE long
 291
 292 #ifdef __CYGWIN__
 293 # ifndef BITS_PER_LONG
 294 #  if (~0UL) == 0xffffffffUL
 295 #   define BITS_PER_LONG 32
 296 #  else
 297 #   define BITS_PER_LONG 64
 298 #  endif
 299 # endif
 300 #endif
 301
 302 #if BITS_PER_LONG > 32
 303 # define LI_POISON ((int)0x5a5a5a5a5a5a5a5a)
 304 # define LL_POISON ((long)0x5a5a5a5a5a5a5a5a)
 305 # define LP_POISON ((void *)(long)0x5a5a5a5a5a5a5a5a)
 306 #else
 307 # define LI_POISON ((int)0x5a5a5a5a)
 308 # define LL_POISON ((long)0x5a5a5a5a)
 309 # define LP_POISON ((void *)(long)0x5a5a5a5a)
 310 #endif
 311
 312 /* this is a bit chunky */
 313
 314 #if defined(__KERNEL__)
 315  #define _LWORDSIZE BITS_PER_LONG
 316 #else
 317  #define _LWORDSIZE __WORDSIZE
 318 #endif
 319
 320 #if (defined(__x86_64__) && (defined(__KERNEL__) || defined(CRAY_XT3)))
 321 /* x86_64 defines __u64 as "long" in userspace, but "long long" in the kernel */
 322 # define LPU64 "%Lu"
 323 # define LPD64 "%Ld"
 324 # define LPX64 "%#Lx"
 325 # define LPF64 "L"
 326 # define LPSZ  "%lu"
 327 # define LPSSZ "%ld"
 328 #elif (_LWORDSIZE == 32)
 329 # define LPU64 "%Lu"
 330 # define LPD64 "%Ld"
 331 # define LPX64 "%#Lx"
 332 # define LPF64 "L"
 333 # define LPSZ  "%u"
 334 # define LPSSZ "%d"
 335 #elif (_LWORDSIZE == 64)
 336 # define LPU64 "%lu"
 337 # define LPD64 "%ld"
 338 # define LPX64 "%#lx"
 339 # define LPF64 "l"
 340 # define LPSZ  "%lu"
 341 # define LPSSZ "%ld"
 342 #endif
 343 #ifndef LPU64
 344 # error "No word size defined"
 345 #endif
 346
 347 #undef _LWORDSIZE
 348
 349 #endif