openwrt/package/linux/kernel-source/drivers/net/hnd/linux_osl.c

   1 /*
   2  * Linux OS Independent Layer
   3  *
   4  * Copyright 2004, Broadcom Corporation
   5  * All Rights Reserved.
   6  *
   7  * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
   8  * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
   9  * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
  10  * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
  11  *
  12  * $Id$
  13  */
  14
  15 #define LINUX_OSL
  16
  17 #include <typedefs.h>
  18 #include <bcmendian.h>
  19 #include <linuxver.h>
  20 #include <linux_osl.h>
  21 #include <bcmutils.h>
  22 #include <linux/delay.h>
  23 #ifdef mips
  24 #include <asm/paccess.h>
  25 #endif
  26 #include <pcicfg.h>
  27
  28 #define PCI_CFG_RETRY 10
  29
  30 void*
  31 osl_pktget(void *drv, uint len, bool send)
  32 {
  33         struct sk_buff *skb;
  34
  35         if ((skb = dev_alloc_skb(len)) == NULL)
  36                 return (NULL);
  37
  38         skb_put(skb, len);
  39
  40         /* ensure the cookie field is cleared */
  41         PKTSETCOOKIE(skb, NULL);
  42
  43         return ((void*) skb);
  44 }
  45
  46 void
  47 osl_pktfree(void *p)
  48 {
  49         struct sk_buff *skb, *nskb;
  50
  51         skb = (struct sk_buff*) p;
  52
  53         /* perversion: we use skb->next to chain multi-skb packets */
  54         while (skb) {
  55                 nskb = skb->next;
  56                 skb->next = NULL;
  57                 if (skb->destructor) {
  58                         /* cannot kfree_skb() on hard IRQ (net/core/skbuff.c) if destructor exists */
  59                         dev_kfree_skb_any(skb);
  60                 } else {
  61                         /* can free immediately (even in_irq()) if destructor does not exist */
  62                         dev_kfree_skb(skb);
  63                 }
  64                 skb = nskb;
  65         }
  66 }
  67
  68 uint32
  69 osl_pci_read_config(void *loc, uint offset, uint size)
  70 {
  71         struct pci_dev *pdev;
  72         uint val;
  73         uint retry=PCI_CFG_RETRY;
  74
  75         /* only 4byte access supported */
  76         ASSERT(size == 4);
  77
  78         pdev = (struct pci_dev*)loc;
  79         do {
  80                 pci_read_config_dword(pdev, offset, &val);
  81                 if (val != 0xffffffff)
  82                         break;
  83         } while (retry--);
  84
  85
  86         return (val);
  87 }
  88
  89 void
  90 osl_pci_write_config(void *loc, uint offset, uint size, uint val)
  91 {
  92         struct pci_dev *pdev;
  93         uint retry=PCI_CFG_RETRY;
  94
  95         /* only 4byte access supported */
  96         ASSERT(size == 4);
  97
  98         pdev = (struct pci_dev*)loc;
  99
 100         do {
 101                 pci_write_config_dword(pdev, offset, val);
 102                 if (offset!=PCI_BAR0_WIN)
 103                         break;
 104                 if (osl_pci_read_config(loc,offset,size) == val)
 105                         break;
 106         } while (retry--);
 107
 108 }
 109
 110 static void
 111 osl_pcmcia_attr(void *osh, uint offset, char *buf, int size, bool write)
 112 {
 113 }
 114
 115 void
 116 osl_pcmcia_read_attr(void *osh, uint offset, void *buf, int size)
 117 {
 118         osl_pcmcia_attr(osh, offset, (char *) buf, size, FALSE);
 119 }
 120
 121 void
 122 osl_pcmcia_write_attr(void *osh, uint offset, void *buf, int size)
 123 {
 124         osl_pcmcia_attr(osh, offset, (char *) buf, size, TRUE);
 125 }
 126
 127 #if defined(BINOSL)
 128
 129 void
 130 osl_assert(char *exp, char *file, int line)
 131 {
 132         char tempbuf[255];
 133
 134         sprintf(tempbuf, "assertion \"%s\" failed: file \"%s\", line %d\n", exp, file, line);
 135         panic(tempbuf);
 136 }
 137
 138
 139
 140 void*
 141 osl_malloc(uint size)
 142 {
 143         return (kmalloc(size, GFP_ATOMIC));
 144 }
 145
 146 void
 147 osl_mfree(void *addr, uint size)
 148 {
 149         kfree(addr);
 150 }
 151
 152 uint
 153 osl_malloced(void)
 154 {
 155 #ifdef MODULE
 156         return malloced;
 157 #else
 158         return 0;
 159 #endif
 160 }
 161
 162 #endif  /* defined(BCMDBG) || defined(BINOSL) */
 163
 164 /*
 165  * BINOSL selects the slightly slower function-call-based binary compatible osl.
 166  */
 167 #ifdef BINOSL
 168
 169 int
 170 osl_printf(const char *format, ...)
 171 {
 172         va_list args;
 173         char buf[1024];
 174         int len;
 175
 176         /* sprintf into a local buffer because there *is* no "vprintk()".. */
 177         va_start(args, format);
 178         len = vsprintf(buf, format, args);
 179         va_end(args);
 180
 181         if (len > sizeof (buf)) {
 182                 printk("osl_printf: buffer overrun\n");
 183                 return (0);
 184         }
 185
 186         return (printk(buf));
 187 }
 188
 189 int
 190 osl_sprintf(char *buf, const char *format, ...)
 191 {
 192         va_list args;
 193         int rc;
 194
 195         va_start(args, format);
 196         rc = vsprintf(buf, format, args);
 197         va_end(args);
 198         return (rc);
 199 }
 200
 201 int
 202 osl_strcmp(const char *s1, const char *s2)
 203 {
 204         return (strcmp(s1, s2));
 205 }
 206
 207 int
 208 osl_strncmp(const char *s1, const char *s2, uint n)
 209 {
 210         return (strncmp(s1, s2, n));
 211 }
 212
 213 int
 214 osl_strlen(char *s)
 215 {
 216         return (strlen(s));
 217 }
 218
 219 char*
 220 osl_strcpy(char *d, const char *s)
 221 {
 222         return (strcpy(d, s));
 223 }
 224
 225 char*
 226 osl_strncpy(char *d, const char *s, uint n)
 227 {
 228         return (strncpy(d, s, n));
 229 }
 230
 231 void
 232 bcopy(const void *src, void *dst, int len)
 233 {
 234         memcpy(dst, src, len);
 235 }
 236
 237 int
 238 bcmp(const void *b1, const void *b2, int len)
 239 {
 240         return (memcmp(b1, b2, len));
 241 }
 242
 243 void
 244 bzero(void *b, int len)
 245 {
 246         memset(b, '\0', len);
 247 }
 248
 249 uint32
 250 osl_readl(volatile uint32 *r)
 251 {
 252         return (readl(r));
 253 }
 254
 255 uint16
 256 osl_readw(volatile uint16 *r)
 257 {
 258         return (readw(r));
 259 }
 260
 261 uint8
 262 osl_readb(volatile uint8 *r)
 263 {
 264         return (readb(r));
 265 }
 266
 267 void
 268 osl_writel(uint32 v, volatile uint32 *r)
 269 {
 270         writel(v, r);
 271 }
 272
 273 void
 274 osl_writew(uint16 v, volatile uint16 *r)
 275 {
 276         writew(v, r);
 277 }
 278
 279 void
 280 osl_writeb(uint8 v, volatile uint8 *r)
 281 {
 282         writeb(v, r);
 283 }
 284
 285 void *
 286 osl_uncached(void *va)
 287 {
 288 #ifdef mips
 289         return ((void*)KSEG1ADDR(va));
 290 #else
 291         return ((void*)va);
 292 #endif
 293 }
 294
 295 uint
 296 osl_getcycles(void)
 297 {
 298         uint cycles;
 299
 300 #if defined(mips)
 301         cycles = read_c0_count() * 2;
 302 #elif defined(__i386__)
 303         rdtscl(cycles);
 304 #else
 305         cycles = 0;
 306 #endif
 307         return cycles;
 308 }
 309
 310 void *
 311 osl_reg_map(uint32 pa, uint size)
 312 {
 313         return (ioremap_nocache((unsigned long)pa, (unsigned long)size));
 314 }
 315
 316 void
 317 osl_reg_unmap(void *va)
 318 {
 319         iounmap(va);
 320 }
 321
 322 int
 323 osl_busprobe(uint32 *val, uint32 addr)
 324 {
 325 #ifdef mips
 326         return get_dbe(*val, (uint32*)addr);
 327 #else
 328         *val = readl(addr);
 329         return 0;
 330 #endif
 331 }
 332
 333 void*
 334 osl_dma_alloc_consistent(void *dev, uint size, ulong *pap)
 335 {
 336         return (pci_alloc_consistent((struct pci_dev*)dev, size, (dma_addr_t*)pap));
 337 }
 338
 339 void
 340 osl_dma_free_consistent(void *dev, void *va, uint size, ulong pa)
 341 {
 342         pci_free_consistent((struct pci_dev*)dev, size, va, (dma_addr_t)pa);
 343 }
 344
 345 uint
 346 osl_dma_map(void *dev, void *va, uint size, int direction)
 347 {
 348         int dir;
 349
 350         dir = (direction == DMA_TX)? PCI_DMA_TODEVICE: PCI_DMA_FROMDEVICE;
 351         return (pci_map_single(dev, va, size, dir));
 352 }
 353
 354 void
 355 osl_dma_unmap(void *dev, uint pa, uint size, int direction)
 356 {
 357         int dir;
 358
 359         dir = (direction == DMA_TX)? PCI_DMA_TODEVICE: PCI_DMA_FROMDEVICE;
 360         pci_unmap_single(dev, (uint32)pa, size, dir);
 361 }
 362
 363 void
 364 osl_delay(uint usec)
 365 {
 366         udelay(usec);
 367 }
 368
 369 uchar*
 370 osl_pktdata(void *drv, void *skb)
 371 {
 372         return (((struct sk_buff*)skb)->data);
 373 }
 374
 375 uint
 376 osl_pktlen(void *drv, void *skb)
 377 {
 378         return (((struct sk_buff*)skb)->len);
 379 }
 380
 381 uint
 382 osl_pktheadroom(void *drv, void *skb)
 383 {
 384         return (uint) skb_headroom((struct sk_buff *) skb);
 385 }
 386
 387 uint
 388 osl_pkttailroom(void *drv, void *skb)
 389 {
 390         return (uint) skb_tailroom((struct sk_buff *) skb);
 391 }
 392
 393 void*
 394 osl_pktnext(void *drv, void *skb)
 395 {
 396         return (((struct sk_buff*)skb)->next);
 397 }
 398
 399 void
 400 osl_pktsetnext(void *skb, void *x)
 401 {
 402         ((struct sk_buff*)skb)->next = (struct sk_buff*)x;
 403 }
 404
 405 void
 406 osl_pktsetlen(void *drv, void *skb, uint len)
 407 {
 408         __skb_trim((struct sk_buff*)skb, len);
 409 }
 410
 411 uchar*
 412 osl_pktpush(void *drv, void *skb, int bytes)
 413 {
 414         return (skb_push((struct sk_buff*)skb, bytes));
 415 }
 416
 417 uchar*
 418 osl_pktpull(void *drv, void *skb, int bytes)
 419 {
 420         return (skb_pull((struct sk_buff*)skb, bytes));
 421 }
 422
 423 void*
 424 osl_pktdup(void *drv, void *skb)
 425 {
 426         return (skb_clone((struct sk_buff*)skb, GFP_ATOMIC));
 427 }
 428
 429 void*
 430 osl_pktcookie(void *skb)
 431 {
 432         return ((void*)((struct sk_buff*)skb)->csum);
 433 }
 434
 435 void
 436 osl_pktsetcookie(void *skb, void *x)
 437 {
 438         ((struct sk_buff*)skb)->csum = (uint)x;
 439 }
 440
 441 void*
 442 osl_pktlink(void *skb)
 443 {
 444         return (((struct sk_buff*)skb)->prev);
 445 }
 446
 447 void
 448 osl_pktsetlink(void *skb, void *x)
 449 {
 450         ((struct sk_buff*)skb)->prev = (struct sk_buff*)x;
 451 }
 452
 453 uint
 454 osl_pktprio(void *skb)
 455 {
 456         return (((struct sk_buff*)skb)->priority);
 457 }
 458
 459 void
 460 osl_pktsetprio(void *skb, uint x)
 461 {
 462         ((struct sk_buff*)skb)->priority = x;
 463 }
 464
 465 #endif  /* BINOSL */