drivers/staging/brcm80211/util/linux_osl.c

   1 /*
   2  * Copyright (c) 2010 Broadcom Corporation
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <typedefs.h>
  18 #include <bcmendian.h>
  19 #include <linuxver.h>
  20 #include <bcmdefs.h>
  21 #include <osl.h>
  22 #include <bcmutils.h>
  23 #include <linux/delay.h>
  24 #ifdef mips
  25 #include <asm/paccess.h>
  26 #endif                          /* mips */
  27 #include <pcicfg.h>
  28
  29 #include <linux/fs.h>
  30
  31 #define PCI_CFG_RETRY           10
  32
  33 #define OS_HANDLE_MAGIC         0x1234abcd      /* Magic # to recognise osh */
  34 #define BCM_MEM_FILENAME_LEN    24      /* Mem. filename length */
  35
  36 typedef struct bcm_mem_link {
  37         struct bcm_mem_link *prev;
  38         struct bcm_mem_link *next;
  39         uint size;
  40         int line;
  41         char file[BCM_MEM_FILENAME_LEN];
  42 } bcm_mem_link_t;
  43
  44 struct osl_info {
  45         osl_pubinfo_t pub;
  46         uint magic;
  47         void *pdev;
  48         uint malloced;
  49         uint failed;
  50         uint bustype;
  51         bcm_mem_link_t *dbgmem_list;
  52 };
  53
  54 /* Global ASSERT type flag */
  55 uint32 g_assert_type;
  56
  57 static int16 linuxbcmerrormap[] = { 0,  /* 0 */
  58         -EINVAL,                /* BCME_ERROR */
  59         -EINVAL,                /* BCME_BADARG */
  60         -EINVAL,                /* BCME_BADOPTION */
  61         -EINVAL,                /* BCME_NOTUP */
  62         -EINVAL,                /* BCME_NOTDOWN */
  63         -EINVAL,                /* BCME_NOTAP */
  64         -EINVAL,                /* BCME_NOTSTA */
  65         -EINVAL,                /* BCME_BADKEYIDX */
  66         -EINVAL,                /* BCME_RADIOOFF */
  67         -EINVAL,                /* BCME_NOTBANDLOCKED */
  68         -EINVAL,                /* BCME_NOCLK */
  69         -EINVAL,                /* BCME_BADRATESET */
  70         -EINVAL,                /* BCME_BADBAND */
  71         -E2BIG,                 /* BCME_BUFTOOSHORT */
  72         -E2BIG,                 /* BCME_BUFTOOLONG */
  73         -EBUSY,                 /* BCME_BUSY */
  74         -EINVAL,                /* BCME_NOTASSOCIATED */
  75         -EINVAL,                /* BCME_BADSSIDLEN */
  76         -EINVAL,                /* BCME_OUTOFRANGECHAN */
  77         -EINVAL,                /* BCME_BADCHAN */
  78         -EFAULT,                /* BCME_BADADDR */
  79         -ENOMEM,                /* BCME_NORESOURCE */
  80         -EOPNOTSUPP,            /* BCME_UNSUPPORTED */
  81         -EMSGSIZE,              /* BCME_BADLENGTH */
  82         -EINVAL,                /* BCME_NOTREADY */
  83         -EPERM,                 /* BCME_NOTPERMITTED */
  84         -ENOMEM,                /* BCME_NOMEM */
  85         -EINVAL,                /* BCME_ASSOCIATED */
  86         -ERANGE,                /* BCME_RANGE */
  87         -EINVAL,                /* BCME_NOTFOUND */
  88         -EINVAL,                /* BCME_WME_NOT_ENABLED */
  89         -EINVAL,                /* BCME_TSPEC_NOTFOUND */
  90         -EINVAL,                /* BCME_ACM_NOTSUPPORTED */
  91         -EINVAL,                /* BCME_NOT_WME_ASSOCIATION */
  92         -EIO,                   /* BCME_SDIO_ERROR */
  93         -ENODEV,                /* BCME_DONGLE_DOWN */
  94         -EINVAL,                /* BCME_VERSION */
  95         -EIO,                   /* BCME_TXFAIL */
  96         -EIO,                   /* BCME_RXFAIL */
  97         -EINVAL,                /* BCME_NODEVICE */
  98         -EINVAL,                /* BCME_NMODE_DISABLED */
  99         -ENODATA,               /* BCME_NONRESIDENT */
 100
 101 /* When an new error code is added to bcmutils.h, add os
 102  * spcecific error translation here as well
 103  */
 104 /* check if BCME_LAST changed since the last time this function was updated */
 105 #if BCME_LAST != -42
 106 #error "You need to add a OS error translation in the linuxbcmerrormap \
 107         for new error code defined in bcmutils.h"
 108 #endif
 109 };
 110
 111 /* translate bcmerrors into linux errors */
 112 int osl_error(int bcmerror)
 113 {
 114         if (bcmerror > 0)
 115                 bcmerror = 0;
 116         else if (bcmerror < BCME_LAST)
 117                 bcmerror = BCME_ERROR;
 118
 119         /* Array bounds covered by ASSERT in osl_attach */
 120         return linuxbcmerrormap[-bcmerror];
 121 }
 122
 123 osl_t *osl_attach(void *pdev, uint bustype, bool pkttag)
 124 {
 125         osl_t *osh;
 126
 127         osh = kmalloc(sizeof(osl_t), GFP_ATOMIC);
 128         ASSERT(osh);
 129
 130         bzero(osh, sizeof(osl_t));
 131
 132         /* Check that error map has the right number of entries in it */
 133         ASSERT(ABS(BCME_LAST) == (ARRAYSIZE(linuxbcmerrormap) - 1));
 134
 135         osh->magic = OS_HANDLE_MAGIC;
 136         osh->malloced = 0;
 137         osh->failed = 0;
 138         osh->dbgmem_list = NULL;
 139         osh->pdev = pdev;
 140         osh->pub.pkttag = pkttag;
 141         osh->bustype = bustype;
 142
 143         switch (bustype) {
 144         case PCI_BUS:
 145         case SI_BUS:
 146                 osh->pub.mmbus = TRUE;
 147                 break;
 148         case JTAG_BUS:
 149         case SDIO_BUS:
 150         case USB_BUS:
 151         case SPI_BUS:
 152         case RPC_BUS:
 153                 osh->pub.mmbus = FALSE;
 154                 break;
 155         default:
 156                 ASSERT(FALSE);
 157                 break;
 158         }
 159
 160 #ifdef BCMDBG
 161         if (pkttag) {
 162                 struct sk_buff *skb;
 163                 ASSERT(OSL_PKTTAG_SZ <= sizeof(skb->cb));
 164         }
 165 #endif
 166         return osh;
 167 }
 168
 169 void osl_detach(osl_t *osh)
 170 {
 171         if (osh == NULL)
 172                 return;
 173
 174         ASSERT(osh->magic == OS_HANDLE_MAGIC);
 175         kfree(osh);
 176 }
 177
 178 /* Return a new packet. zero out pkttag */
 179 void *BCMFASTPATH osl_pktget(osl_t *osh, uint len)
 180 {
 181         struct sk_buff *skb;
 182
 183         skb = dev_alloc_skb(len);
 184         if (skb) {
 185                 skb_put(skb, len);
 186                 skb->priority = 0;
 187
 188                 osh->pub.pktalloced++;
 189         }
 190
 191         return (void *)skb;
 192 }
 193
 194 /* Free the driver packet. Free the tag if present */
 195 void BCMFASTPATH osl_pktfree(osl_t *osh, void *p, bool send)
 196 {
 197         struct sk_buff *skb, *nskb;
 198         int nest = 0;
 199
 200         skb = (struct sk_buff *)p;
 201         ASSERT(skb);
 202
 203         if (send && osh->pub.tx_fn)
 204                 osh->pub.tx_fn(osh->pub.tx_ctx, p, 0);
 205
 206         /* perversion: we use skb->next to chain multi-skb packets */
 207         while (skb) {
 208                 nskb = skb->next;
 209                 skb->next = NULL;
 210
 211                 if (skb->destructor)
 212                         /* cannot kfree_skb() on hard IRQ (net/core/skbuff.c) if
 213                          * destructor exists
 214                          */
 215                         dev_kfree_skb_any(skb);
 216                 else
 217                         /* can free immediately (even in_irq()) if destructor
 218                          * does not exist
 219                          */
 220                         dev_kfree_skb(skb);
 221
 222                 osh->pub.pktalloced--;
 223                 nest++;
 224                 skb = nskb;
 225         }
 226 }
 227
 228 uint32 osl_pci_read_config(osl_t *osh, uint offset, uint size)
 229 {
 230         uint val = 0;
 231         uint retry = PCI_CFG_RETRY;
 232
 233         ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
 234
 235         /* only 4byte access supported */
 236         ASSERT(size == 4);
 237
 238         do {
 239                 pci_read_config_dword(osh->pdev, offset, &val);
 240                 if (val != 0xffffffff)
 241                         break;
 242         } while (retry--);
 243
 244 #ifdef BCMDBG
 245         if (retry < PCI_CFG_RETRY)
 246                 printk("PCI CONFIG READ access to %d required %d retries\n",
 247                        offset, (PCI_CFG_RETRY - retry));
 248 #endif                          /* BCMDBG */
 249
 250         return val;
 251 }
 252
 253 void osl_pci_write_config(osl_t *osh, uint offset, uint size, uint val)
 254 {
 255         uint retry = PCI_CFG_RETRY;
 256
 257         ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
 258
 259         /* only 4byte access supported */
 260         ASSERT(size == 4);
 261
 262         do {
 263                 pci_write_config_dword(osh->pdev, offset, val);
 264                 if (offset != PCI_BAR0_WIN)
 265                         break;
 266                 if (osl_pci_read_config(osh, offset, size) == val)
 267                         break;
 268         } while (retry--);
 269
 270 #ifdef BCMDBG
 271         if (retry < PCI_CFG_RETRY)
 272                 printk("PCI CONFIG WRITE access to %d required %d retries\n",
 273                        offset, (PCI_CFG_RETRY - retry));
 274 #endif                          /* BCMDBG */
 275 }
 276
 277 /* return bus # for the pci device pointed by osh->pdev */
 278 uint osl_pci_bus(osl_t *osh)
 279 {
 280         ASSERT(osh && (osh->magic == OS_HANDLE_MAGIC) && osh->pdev);
 281
 282         return ((struct pci_dev *)osh->pdev)->bus->number;
 283 }
 284
 285 /* return slot # for the pci device pointed by osh->pdev */
 286 uint osl_pci_slot(osl_t *osh)
 287 {
 288         ASSERT(osh && (osh->magic == OS_HANDLE_MAGIC) && osh->pdev);
 289
 290         return PCI_SLOT(((struct pci_dev *)osh->pdev)->devfn);
 291 }
 292
 293 static void
 294 osl_pcmcia_attr(osl_t *osh, uint offset, char *buf, int size, bool write)
 295 {
 296 }
 297
 298 void osl_pcmcia_read_attr(osl_t *osh, uint offset, void *buf, int size)
 299 {
 300         osl_pcmcia_attr(osh, offset, (char *)buf, size, FALSE);
 301 }
 302
 303 void osl_pcmcia_write_attr(osl_t *osh, uint offset, void *buf, int size)
 304 {
 305         osl_pcmcia_attr(osh, offset, (char *)buf, size, TRUE);
 306 }
 307
 308 void *osl_malloc(osl_t *osh, uint size)
 309 {
 310         void *addr;
 311
 312         /* only ASSERT if osh is defined */
 313         if (osh)
 314                 ASSERT(osh->magic == OS_HANDLE_MAGIC);
 315
 316         addr = kmalloc(size, GFP_ATOMIC);
 317         if (addr == NULL) {
 318                 if (osh)
 319                         osh->failed++;
 320                 return NULL;
 321         }
 322         if (osh)
 323                 osh->malloced += size;
 324
 325         return addr;
 326 }
 327
 328 void osl_mfree(osl_t *osh, void *addr, uint size)
 329 {
 330         if (osh) {
 331                 ASSERT(osh->magic == OS_HANDLE_MAGIC);
 332                 osh->malloced -= size;
 333         }
 334         kfree(addr);
 335 }
 336
 337 uint osl_malloced(osl_t *osh)
 338 {
 339         ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
 340         return osh->malloced;
 341 }
 342
 343 uint osl_malloc_failed(osl_t *osh)
 344 {
 345         ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
 346         return osh->failed;
 347 }
 348
 349 uint osl_dma_consistent_align(void)
 350 {
 351         return PAGE_SIZE;
 352 }
 353
 354 void *osl_dma_alloc_consistent(osl_t *osh, uint size, uint16 align_bits,
 355                                uint *alloced, unsigned long *pap)
 356 {
 357         uint16 align = (1 << align_bits);
 358         ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
 359
 360         if (!ISALIGNED(DMA_CONSISTENT_ALIGN, align))
 361                 size += align;
 362         *alloced = size;
 363
 364         return pci_alloc_consistent(osh->pdev, size, (dma_addr_t *) pap);
 365 }
 366
 367 void osl_dma_free_consistent(osl_t *osh, void *va, uint size, unsigned long pa)
 368 {
 369         ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
 370
 371         pci_free_consistent(osh->pdev, size, va, (dma_addr_t) pa);
 372 }
 373
 374 uint BCMFASTPATH osl_dma_map(osl_t *osh, void *va, uint size, int direction)
 375 {
 376         int dir;
 377
 378         ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
 379         dir = (direction == DMA_TX) ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE;
 380         return pci_map_single(osh->pdev, va, size, dir);
 381 }
 382
 383 void BCMFASTPATH osl_dma_unmap(osl_t *osh, uint pa, uint size, int direction)
 384 {
 385         int dir;
 386
 387         ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
 388         dir = (direction == DMA_TX) ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE;
 389         pci_unmap_single(osh->pdev, (uint32) pa, size, dir);
 390 }
 391
 392 #if defined(BCMDBG_ASSERT)
 393 void osl_assert(char *exp, char *file, int line)
 394 {
 395         char tempbuf[256];
 396         char *basename;
 397
 398         basename = strrchr(file, '/');
 399         /* skip the '/' */
 400         if (basename)
 401                 basename++;
 402
 403         if (!basename)
 404                 basename = file;
 405
 406 #ifdef BCMDBG_ASSERT
 407         snprintf(tempbuf, 256,
 408                  "assertion \"%s\" failed: file \"%s\", line %d\n", exp,
 409                  basename, line);
 410
 411         /* Print assert message and give it time to be written to /var/log/messages */
 412         if (!in_interrupt()) {
 413                 const int delay = 3;
 414                 printk("%s", tempbuf);
 415                 printk("panic in %d seconds\n", delay);
 416                 set_current_state(TASK_INTERRUPTIBLE);
 417                 schedule_timeout(delay * HZ);
 418         }
 419
 420         switch (g_assert_type) {
 421         case 0:
 422                 panic("%s", tempbuf);
 423                 break;
 424         case 1:
 425                 printk("%s", tempbuf);
 426                 BUG();
 427                 break;
 428         case 2:
 429                 printk("%s", tempbuf);
 430                 break;
 431         default:
 432                 break;
 433         }
 434 #endif                          /* BCMDBG_ASSERT */
 435
 436 }
 437 #endif                          /* defined(BCMDBG_ASSERT) */
 438
 439 void osl_delay(uint usec)
 440 {
 441         uint d;
 442
 443         while (usec > 0) {
 444                 d = MIN(usec, 1000);
 445                 udelay(d);
 446                 usec -= d;
 447         }
 448 }
 449
 450 /* Clone a packet.
 451  * The pkttag contents are NOT cloned.
 452  */
 453 void *osl_pktdup(osl_t *osh, void *skb)
 454 {
 455         void *p;
 456
 457         p = skb_clone((struct sk_buff *)skb, GFP_ATOMIC);
 458         if (p == NULL)
 459                 return NULL;
 460
 461         /* skb_clone copies skb->cb.. we don't want that */
 462         if (osh->pub.pkttag)
 463                 bzero((void *)((struct sk_buff *)p)->cb, OSL_PKTTAG_SZ);
 464
 465         /* Increment the packet counter */
 466         osh->pub.pktalloced++;
 467         return p;
 468 }
 469
 470 #ifdef BCMSDIO
 471 u8 osl_readb(osl_t *osh, volatile u8 *r)
 472 {
 473         osl_rreg_fn_t rreg = ((osl_pubinfo_t *) osh)->rreg_fn;
 474         void *ctx = ((osl_pubinfo_t *) osh)->reg_ctx;
 475
 476         return (u8) ((rreg) (ctx, (void *)r, sizeof(u8)));
 477 }
 478
 479 uint16 osl_readw(osl_t *osh, volatile uint16 *r)
 480 {
 481         osl_rreg_fn_t rreg = ((osl_pubinfo_t *) osh)->rreg_fn;
 482         void *ctx = ((osl_pubinfo_t *) osh)->reg_ctx;
 483
 484         return (uint16) ((rreg) (ctx, (void *)r, sizeof(uint16)));
 485 }
 486
 487 uint32 osl_readl(osl_t *osh, volatile uint32 *r)
 488 {
 489         osl_rreg_fn_t rreg = ((osl_pubinfo_t *) osh)->rreg_fn;
 490         void *ctx = ((osl_pubinfo_t *) osh)->reg_ctx;
 491
 492         return (uint32) ((rreg) (ctx, (void *)r, sizeof(uint32)));
 493 }
 494
 495 void osl_writeb(osl_t *osh, volatile u8 *r, u8 v)
 496 {
 497         osl_wreg_fn_t wreg = ((osl_pubinfo_t *) osh)->wreg_fn;
 498         void *ctx = ((osl_pubinfo_t *) osh)->reg_ctx;
 499
 500         ((wreg) (ctx, (void *)r, v, sizeof(u8)));
 501 }
 502
 503 void osl_writew(osl_t *osh, volatile uint16 *r, uint16 v)
 504 {
 505         osl_wreg_fn_t wreg = ((osl_pubinfo_t *) osh)->wreg_fn;
 506         void *ctx = ((osl_pubinfo_t *) osh)->reg_ctx;
 507
 508         ((wreg) (ctx, (void *)r, v, sizeof(uint16)));
 509 }
 510
 511 void osl_writel(osl_t *osh, volatile uint32 *r, uint32 v)
 512 {
 513         osl_wreg_fn_t wreg = ((osl_pubinfo_t *) osh)->wreg_fn;
 514         void *ctx = ((osl_pubinfo_t *) osh)->reg_ctx;
 515
 516         ((wreg) (ctx, (void *)r, v, sizeof(uint32)));
 517 }
 518 #endif                          /* BCMSDIO */
 519 /* Linux Kernel: File Operations: end */