openwrt/package/linux/kernel-source/include/linuxver.h

   1 /*
   2  * Linux-specific abstractions to gain some independence from linux kernel versions.
   3  * Pave over some 2.2 versus 2.4 versus 2.6 kernel differences.
   4  *
   5  * Copyright 2004, Broadcom Corporation
   6  * All Rights Reserved.
   7  *
   8  * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
   9  * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
  10  * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
  11  * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
  12  *
  13  * $Id$
  14  */
  15
  16 #ifndef _linuxver_h_
  17 #define _linuxver_h_
  18
  19 #include <linux/config.h>
  20 #include <linux/version.h>
  21
  22 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
  23 /* __NO_VERSION__ must be defined for all linkables except one in 2.2 */
  24 #ifdef __UNDEF_NO_VERSION__
  25 #undef __NO_VERSION__
  26 #else
  27 #define __NO_VERSION__
  28 #endif
  29 #endif
  30
  31 #if defined(MODULE) && defined(MODVERSIONS)
  32 #include <linux/modversions.h>
  33 #endif
  34
  35 /* linux/malloc.h is deprecated, use linux/slab.h instead. */
  36 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,9))
  37 #include <linux/malloc.h>
  38 #else
  39 #include <linux/slab.h>
  40 #endif
  41
  42 #include <linux/types.h>
  43 #include <linux/init.h>
  44 #include <linux/module.h>
  45 #include <linux/mm.h>
  46 #include <linux/string.h>
  47 #include <linux/pci.h>
  48 #include <linux/interrupt.h>
  49 #include <linux/netdevice.h>
  50 #include <asm/io.h>
  51
  52 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,41))
  53 #include <linux/workqueue.h>
  54 #else
  55 #include <linux/tqueue.h>
  56 #define work_struct tq_struct
  57 #define INIT_WORK(_work, _func, _data) INIT_TQUEUE((_work), (_func), (_data))
  58 #define schedule_work(_work) schedule_task((_work))
  59 #define flush_scheduled_work() flush_scheduled_tasks()
  60 #endif
  61
  62 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0))
  63 /* Some distributions have their own 2.6.x compatibility layers */
  64 #ifndef IRQ_NONE
  65 typedef void irqreturn_t;
  66 #define IRQ_NONE
  67 #define IRQ_HANDLED
  68 #define IRQ_RETVAL(x)
  69 #endif
  70 #endif
  71
  72 #if defined(CONFIG_PCMCIA) || defined(CONFIG_PCMCIA_MODULE)
  73
  74 #include <pcmcia/version.h>
  75 #include <pcmcia/cs_types.h>
  76 #include <pcmcia/cs.h>
  77 #include <pcmcia/cistpl.h>
  78 #include <pcmcia/cisreg.h>
  79 #include <pcmcia/ds.h>
  80
  81 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,69))
  82 /* In 2.5 (as of 2.5.69 at least) there is a cs_error exported which
  83  * does this, but it's not in 2.4 so we do our own for now. */
  84 static inline void
  85 cs_error(client_handle_t handle, int func, int ret)
  86 {
  87         error_info_t err = { func, ret };
  88         CardServices(ReportError, handle, &err);
  89 }
  90 #endif
  91
  92 #endif /* CONFIG_PCMCIA */
  93
  94 #ifndef __exit
  95 #define __exit
  96 #endif
  97 #ifndef __devexit
  98 #define __devexit
  99 #endif
 100 #ifndef __devinit
 101 #define __devinit       __init
 102 #endif
 103 #ifndef __devinitdata
 104 #define __devinitdata
 105 #endif
 106 #ifndef __devexit_p
 107 #define __devexit_p(x)  x
 108 #endif
 109
 110 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0))
 111
 112 #define pci_get_drvdata(dev)            (dev)->sysdata
 113 #define pci_set_drvdata(dev, value)     (dev)->sysdata=(value)
 114
 115 /*
 116  * New-style (2.4.x) PCI/hot-pluggable PCI/CardBus registration
 117  */
 118
 119 struct pci_device_id {
 120         unsigned int vendor, device;            /* Vendor and device ID or PCI_ANY_ID */
 121         unsigned int subvendor, subdevice;      /* Subsystem ID's or PCI_ANY_ID */
 122         unsigned int class, class_mask;         /* (class,subclass,prog-if) triplet */
 123         unsigned long driver_data;              /* Data private to the driver */
 124 };
 125
 126 struct pci_driver {
 127         struct list_head node;
 128         char *name;
 129         const struct pci_device_id *id_table;   /* NULL if wants all devices */
 130         int (*probe)(struct pci_dev *dev, const struct pci_device_id *id);      /* New device inserted */
 131         void (*remove)(struct pci_dev *dev);    /* Device removed (NULL if not a hot-plug capable driver) */
 132         void (*suspend)(struct pci_dev *dev);   /* Device suspended */
 133         void (*resume)(struct pci_dev *dev);    /* Device woken up */
 134 };
 135
 136 #define MODULE_DEVICE_TABLE(type, name)
 137 #define PCI_ANY_ID (~0)
 138
 139 /* compatpci.c */
 140 #define pci_module_init pci_register_driver
 141 extern int pci_register_driver(struct pci_driver *drv);
 142 extern void pci_unregister_driver(struct pci_driver *drv);
 143
 144 #endif /* PCI registration */
 145
 146 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,2,18))
 147 #ifdef MODULE
 148 #define module_init(x) int init_module(void) { return x(); }
 149 #define module_exit(x) void cleanup_module(void) { x(); }
 150 #else
 151 #define module_init(x)  __initcall(x);
 152 #define module_exit(x)  __exitcall(x);
 153 #endif
 154 #endif
 155
 156 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,48))
 157 #define list_for_each(pos, head) \
 158         for (pos = (head)->next; pos != (head); pos = pos->next)
 159 #endif
 160
 161 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,13))
 162 #define pci_resource_start(dev, bar)    ((dev)->base_address[(bar)])
 163 #elif (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,44))
 164 #define pci_resource_start(dev, bar)    ((dev)->resource[(bar)].start)
 165 #endif
 166
 167 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,23))
 168 #define pci_enable_device(dev) do { } while (0)
 169 #endif
 170
 171 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,14))
 172 #define net_device device
 173 #endif
 174
 175 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,42))
 176
 177 /*
 178  * DMA mapping
 179  *
 180  * See linux/Documentation/DMA-mapping.txt
 181  */
 182
 183 #ifndef PCI_DMA_TODEVICE
 184 #define PCI_DMA_TODEVICE        1
 185 #define PCI_DMA_FROMDEVICE      2
 186 #endif
 187
 188 typedef u32 dma_addr_t;
 189
 190 /* Pure 2^n version of get_order */
 191 static inline int get_order(unsigned long size)
 192 {
 193         int order;
 194
 195         size = (size-1) >> (PAGE_SHIFT-1);
 196         order = -1;
 197         do {
 198                 size >>= 1;
 199                 order++;
 200         } while (size);
 201         return order;
 202 }
 203
 204 static inline void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size,
 205                                          dma_addr_t *dma_handle)
 206 {
 207         void *ret;
 208         int gfp = GFP_ATOMIC | GFP_DMA;
 209
 210         ret = (void *)__get_free_pages(gfp, get_order(size));
 211
 212         if (ret != NULL) {
 213                 memset(ret, 0, size);
 214                 *dma_handle = virt_to_bus(ret);
 215         }
 216         return ret;
 217 }
 218 static inline void pci_free_consistent(struct pci_dev *hwdev, size_t size,
 219                                        void *vaddr, dma_addr_t dma_handle)
 220 {
 221         free_pages((unsigned long)vaddr, get_order(size));
 222 }
 223 #ifdef ILSIM
 224 extern uint pci_map_single(void *dev, void *va, uint size, int direction);
 225 extern void pci_unmap_single(void *dev, uint pa, uint size, int direction);
 226 #else
 227 #define pci_map_single(cookie, address, size, dir)      virt_to_bus(address)
 228 #define pci_unmap_single(cookie, address, size, dir)
 229 #endif
 230
 231 #endif /* DMA mapping */
 232
 233 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,43))
 234
 235 #define dev_kfree_skb_any(a)            dev_kfree_skb(a)
 236 #define netif_down(dev)                 do { (dev)->start = 0; } while(0)
 237
 238 /* pcmcia-cs provides its own netdevice compatibility layer */
 239 #ifndef _COMPAT_NETDEVICE_H
 240
 241 /*
 242  * SoftNet
 243  *
 244  * For pre-softnet kernels we need to tell the upper layer not to
 245  * re-enter start_xmit() while we are in there. However softnet
 246  * guarantees not to enter while we are in there so there is no need
 247  * to do the netif_stop_queue() dance unless the transmit queue really
 248  * gets stuck. This should also improve performance according to tests
 249  * done by Aman Singla.
 250  */
 251
 252 #define dev_kfree_skb_irq(a)            dev_kfree_skb(a)
 253 #define netif_wake_queue(dev)           do { clear_bit(0, &(dev)->tbusy); mark_bh(NET_BH); } while(0)
 254 #define netif_stop_queue(dev)           set_bit(0, &(dev)->tbusy)
 255
 256 static inline void netif_start_queue(struct net_device *dev)
 257 {
 258         dev->tbusy = 0;
 259         dev->interrupt = 0;
 260         dev->start = 1;
 261 }
 262
 263 #define netif_queue_stopped(dev)        (dev)->tbusy
 264 #define netif_running(dev)              (dev)->start
 265
 266 #endif /* _COMPAT_NETDEVICE_H */
 267
 268 #define netif_device_attach(dev)        netif_start_queue(dev)
 269 #define netif_device_detach(dev)        netif_stop_queue(dev)
 270
 271 /* 2.4.x renamed bottom halves to tasklets */
 272 #define tasklet_struct                          tq_struct
 273 static inline void tasklet_schedule(struct tasklet_struct *tasklet)
 274 {
 275         queue_task(tasklet, &tq_immediate);
 276         mark_bh(IMMEDIATE_BH);
 277 }
 278
 279 static inline void tasklet_init(struct tasklet_struct *tasklet,
 280                                 void (*func)(unsigned long),
 281                                 unsigned long data)
 282 {
 283         tasklet->next = NULL;
 284         tasklet->sync = 0;
 285         tasklet->routine = (void (*)(void *))func;
 286         tasklet->data = (void *)data;
 287 }
 288 #define tasklet_kill(tasklet)                   {do{} while(0);}
 289
 290 /* 2.4.x introduced del_timer_sync() */
 291 #define del_timer_sync(timer) del_timer(timer)
 292
 293 #else
 294
 295 #define netif_down(dev)
 296
 297 #endif /* SoftNet */
 298
 299 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,3))
 300
 301 /*
 302  * Emit code to initialise a tq_struct's routine and data pointers
 303  */
 304 #define PREPARE_TQUEUE(_tq, _routine, _data)                    \
 305         do {                                                    \
 306                 (_tq)->routine = _routine;                      \
 307                 (_tq)->data = _data;                            \
 308         } while (0)
 309
 310 /*
 311  * Emit code to initialise all of a tq_struct
 312  */
 313 #define INIT_TQUEUE(_tq, _routine, _data)                       \
 314         do {                                                    \
 315                 INIT_LIST_HEAD(&(_tq)->list);                   \
 316                 (_tq)->sync = 0;                                \
 317                 PREPARE_TQUEUE((_tq), (_routine), (_data));     \
 318         } while (0)
 319
 320 #endif
 321
 322 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,6))
 323
 324 /* Power management related routines */
 325
 326 static inline int
 327 pci_save_state(struct pci_dev *dev, u32 *buffer)
 328 {
 329         int i;
 330         if (buffer) {
 331                 for (i = 0; i < 16; i++)
 332                         pci_read_config_dword(dev, i * 4,&buffer[i]);
 333         }
 334         return 0;
 335 }
 336
 337 static inline int
 338 pci_restore_state(struct pci_dev *dev, u32 *buffer)
 339 {
 340         int i;
 341
 342         if (buffer) {
 343                 for (i = 0; i < 16; i++)
 344                         pci_write_config_dword(dev,i * 4, buffer[i]);
 345         }
 346         /*
 347          * otherwise, write the context information we know from bootup.
 348          * This works around a problem where warm-booting from Windows
 349          * combined with a D3(hot)->D0 transition causes PCI config
 350          * header data to be forgotten.
 351          */
 352         else {
 353                 for (i = 0; i < 6; i ++)
 354                         pci_write_config_dword(dev,
 355                                                PCI_BASE_ADDRESS_0 + (i * 4),
 356                                                pci_resource_start(dev, i));
 357                 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
 358         }
 359         return 0;
 360 }
 361
 362 #endif /* PCI power management */
 363
 364 /* Old cp0 access macros deprecated in 2.4.19 */
 365 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,19))
 366 #define read_c0_count() read_32bit_cp0_register(CP0_COUNT)
 367 #endif
 368
 369 /* Module refcount handled internally in 2.6.x */
 370 #ifndef SET_MODULE_OWNER
 371 #define SET_MODULE_OWNER(dev)           do {} while (0)
 372 #define OLD_MOD_INC_USE_COUNT           MOD_INC_USE_COUNT
 373 #define OLD_MOD_DEC_USE_COUNT           MOD_DEC_USE_COUNT
 374 #else
 375 #define OLD_MOD_INC_USE_COUNT           do {} while (0)
 376 #define OLD_MOD_DEC_USE_COUNT           do {} while (0)
 377 #endif
 378
 379 #ifndef SET_NETDEV_DEV
 380 #define SET_NETDEV_DEV(net, pdev)       do {} while (0)
 381 #endif
 382
 383 #ifndef HAVE_FREE_NETDEV
 384 #define free_netdev(dev)                kfree(dev)
 385 #endif
 386
 387 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0))
 388 /* struct packet_type redefined in 2.6.x */
 389 #define af_packet_priv                  data
 390 #endif
 391
 392 #endif /* _linuxver_h_ */