drivers/net/wireless/brcm80211/brcmfmac/fwil.c

   1 /*
   2  * Copyright (c) 2012 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 /* FWIL is the Firmware Interface Layer. In this module the support functions
  18  * are located to set and get variables to and from the firmware.
  19  */
  20
  21 #include <linux/kernel.h>
  22 #include <linux/netdevice.h>
  23 #include <brcmu_utils.h>
  24 #include <brcmu_wifi.h>
  25 #include "core.h"
  26 #include "bus.h"
  27 #include "debug.h"
  28 #include "tracepoint.h"
  29 #include "fwil.h"
  30 #include "proto.h"
  31
  32
  33 #define MAX_HEX_DUMP_LEN        64
  34
  35 #ifdef DEBUG
  36 static const char * const brcmf_fil_errstr[] = {
  37         "BCME_OK",
  38         "BCME_ERROR",
  39         "BCME_BADARG",
  40         "BCME_BADOPTION",
  41         "BCME_NOTUP",
  42         "BCME_NOTDOWN",
  43         "BCME_NOTAP",
  44         "BCME_NOTSTA",
  45         "BCME_BADKEYIDX",
  46         "BCME_RADIOOFF",
  47         "BCME_NOTBANDLOCKED",
  48         "BCME_NOCLK",
  49         "BCME_BADRATESET",
  50         "BCME_BADBAND",
  51         "BCME_BUFTOOSHORT",
  52         "BCME_BUFTOOLONG",
  53         "BCME_BUSY",
  54         "BCME_NOTASSOCIATED",
  55         "BCME_BADSSIDLEN",
  56         "BCME_OUTOFRANGECHAN",
  57         "BCME_BADCHAN",
  58         "BCME_BADADDR",
  59         "BCME_NORESOURCE",
  60         "BCME_UNSUPPORTED",
  61         "BCME_BADLEN",
  62         "BCME_NOTREADY",
  63         "BCME_EPERM",
  64         "BCME_NOMEM",
  65         "BCME_ASSOCIATED",
  66         "BCME_RANGE",
  67         "BCME_NOTFOUND",
  68         "BCME_WME_NOT_ENABLED",
  69         "BCME_TSPEC_NOTFOUND",
  70         "BCME_ACM_NOTSUPPORTED",
  71         "BCME_NOT_WME_ASSOCIATION",
  72         "BCME_SDIO_ERROR",
  73         "BCME_DONGLE_DOWN",
  74         "BCME_VERSION",
  75         "BCME_TXFAIL",
  76         "BCME_RXFAIL",
  77         "BCME_NODEVICE",
  78         "BCME_NMODE_DISABLED",
  79         "BCME_NONRESIDENT",
  80         "BCME_SCANREJECT",
  81         "BCME_USAGE_ERROR",
  82         "BCME_IOCTL_ERROR",
  83         "BCME_SERIAL_PORT_ERR",
  84         "BCME_DISABLED",
  85         "BCME_DECERR",
  86         "BCME_ENCERR",
  87         "BCME_MICERR",
  88         "BCME_REPLAY",
  89         "BCME_IE_NOTFOUND",
  90 };
  91
  92 static const char *brcmf_fil_get_errstr(u32 err)
  93 {
  94         if (err >= ARRAY_SIZE(brcmf_fil_errstr))
  95                 return "(unknown)";
  96
  97         return brcmf_fil_errstr[err];
  98 }
  99 #else
 100 static const char *brcmf_fil_get_errstr(u32 err)
 101 {
 102         return "";
 103 }
 104 #endif /* DEBUG */
 105
 106 static s32
 107 brcmf_fil_cmd_data(struct brcmf_if *ifp, u32 cmd, void *data, u32 len, bool set)
 108 {
 109         struct brcmf_pub *drvr = ifp->drvr;
 110         s32 err;
 111
 112         if (drvr->bus_if->state != BRCMF_BUS_UP) {
 113                 brcmf_err("bus is down. we have nothing to do.\n");
 114                 return -EIO;
 115         }
 116
 117         if (data != NULL)
 118                 len = min_t(uint, len, BRCMF_DCMD_MAXLEN);
 119         if (set)
 120                 err = brcmf_proto_set_dcmd(drvr, ifp->ifidx, cmd, data, len);
 121         else
 122                 err = brcmf_proto_query_dcmd(drvr, ifp->ifidx, cmd, data, len);
 123
 124         if (err >= 0)
 125                 return 0;
 126
 127         brcmf_dbg(FIL, "Failed: %s (%d)\n",
 128                   brcmf_fil_get_errstr((u32)(-err)), err);
 129         return -EBADE;
 130 }
 131
 132 s32
 133 brcmf_fil_cmd_data_set(struct brcmf_if *ifp, u32 cmd, void *data, u32 len)
 134 {
 135         s32 err;
 136
 137         mutex_lock(&ifp->drvr->proto_block);
 138
 139         brcmf_dbg(FIL, "ifidx=%d, cmd=%d, len=%d\n", ifp->ifidx, cmd, len);
 140         brcmf_dbg_hex_dump(BRCMF_FIL_ON(), data,
 141                            min_t(uint, len, MAX_HEX_DUMP_LEN), "data\n");
 142
 143         err = brcmf_fil_cmd_data(ifp, cmd, data, len, true);
 144         mutex_unlock(&ifp->drvr->proto_block);
 145
 146         return err;
 147 }
 148
 149 s32
 150 brcmf_fil_cmd_data_get(struct brcmf_if *ifp, u32 cmd, void *data, u32 len)
 151 {
 152         s32 err;
 153
 154         mutex_lock(&ifp->drvr->proto_block);
 155         err = brcmf_fil_cmd_data(ifp, cmd, data, len, false);
 156
 157         brcmf_dbg(FIL, "ifidx=%d, cmd=%d, len=%d\n", ifp->ifidx, cmd, len);
 158         brcmf_dbg_hex_dump(BRCMF_FIL_ON(), data,
 159                            min_t(uint, len, MAX_HEX_DUMP_LEN), "data\n");
 160
 161         mutex_unlock(&ifp->drvr->proto_block);
 162
 163         return err;
 164 }
 165
 166
 167 s32
 168 brcmf_fil_cmd_int_set(struct brcmf_if *ifp, u32 cmd, u32 data)
 169 {
 170         s32 err;
 171         __le32 data_le = cpu_to_le32(data);
 172
 173         mutex_lock(&ifp->drvr->proto_block);
 174         brcmf_dbg(FIL, "ifidx=%d, cmd=%d, value=%d\n", ifp->ifidx, cmd, data);
 175         err = brcmf_fil_cmd_data(ifp, cmd, &data_le, sizeof(data_le), true);
 176         mutex_unlock(&ifp->drvr->proto_block);
 177
 178         return err;
 179 }
 180
 181 s32
 182 brcmf_fil_cmd_int_get(struct brcmf_if *ifp, u32 cmd, u32 *data)
 183 {
 184         s32 err;
 185         __le32 data_le = cpu_to_le32(*data);
 186
 187         mutex_lock(&ifp->drvr->proto_block);
 188         err = brcmf_fil_cmd_data(ifp, cmd, &data_le, sizeof(data_le), false);
 189         mutex_unlock(&ifp->drvr->proto_block);
 190         *data = le32_to_cpu(data_le);
 191         brcmf_dbg(FIL, "ifidx=%d, cmd=%d, value=%d\n", ifp->ifidx, cmd, *data);
 192
 193         return err;
 194 }
 195
 196 static u32
 197 brcmf_create_iovar(char *name, const char *data, u32 datalen,
 198                    char *buf, u32 buflen)
 199 {
 200         u32 len;
 201
 202         len = strlen(name) + 1;
 203
 204         if ((len + datalen) > buflen)
 205                 return 0;
 206
 207         memcpy(buf, name, len);
 208
 209         /* append data onto the end of the name string */
 210         if (data && datalen)
 211                 memcpy(&buf[len], data, datalen);
 212
 213         return len + datalen;
 214 }
 215
 216
 217 s32
 218 brcmf_fil_iovar_data_set(struct brcmf_if *ifp, char *name, const void *data,
 219                          u32 len)
 220 {
 221         struct brcmf_pub *drvr = ifp->drvr;
 222         s32 err;
 223         u32 buflen;
 224
 225         mutex_lock(&drvr->proto_block);
 226
 227         brcmf_dbg(FIL, "ifidx=%d, name=%s, len=%d\n", ifp->ifidx, name, len);
 228         brcmf_dbg_hex_dump(BRCMF_FIL_ON(), data,
 229                            min_t(uint, len, MAX_HEX_DUMP_LEN), "data\n");
 230
 231         buflen = brcmf_create_iovar(name, data, len, drvr->proto_buf,
 232                                     sizeof(drvr->proto_buf));
 233         if (buflen) {
 234                 err = brcmf_fil_cmd_data(ifp, BRCMF_C_SET_VAR, drvr->proto_buf,
 235                                          buflen, true);
 236         } else {
 237                 err = -EPERM;
 238                 brcmf_err("Creating iovar failed\n");
 239         }
 240
 241         mutex_unlock(&drvr->proto_block);
 242         return err;
 243 }
 244
 245 s32
 246 brcmf_fil_iovar_data_get(struct brcmf_if *ifp, char *name, void *data,
 247                          u32 len)
 248 {
 249         struct brcmf_pub *drvr = ifp->drvr;
 250         s32 err;
 251         u32 buflen;
 252
 253         mutex_lock(&drvr->proto_block);
 254
 255         buflen = brcmf_create_iovar(name, data, len, drvr->proto_buf,
 256                                     sizeof(drvr->proto_buf));
 257         if (buflen) {
 258                 err = brcmf_fil_cmd_data(ifp, BRCMF_C_GET_VAR, drvr->proto_buf,
 259                                          buflen, false);
 260                 if (err == 0)
 261                         memcpy(data, drvr->proto_buf, len);
 262         } else {
 263                 err = -EPERM;
 264                 brcmf_err("Creating iovar failed\n");
 265         }
 266
 267         brcmf_dbg(FIL, "ifidx=%d, name=%s, len=%d\n", ifp->ifidx, name, len);
 268         brcmf_dbg_hex_dump(BRCMF_FIL_ON(), data,
 269                            min_t(uint, len, MAX_HEX_DUMP_LEN), "data\n");
 270
 271         mutex_unlock(&drvr->proto_block);
 272         return err;
 273 }
 274
 275 s32
 276 brcmf_fil_iovar_int_set(struct brcmf_if *ifp, char *name, u32 data)
 277 {
 278         __le32 data_le = cpu_to_le32(data);
 279
 280         return brcmf_fil_iovar_data_set(ifp, name, &data_le, sizeof(data_le));
 281 }
 282
 283 s32
 284 brcmf_fil_iovar_int_get(struct brcmf_if *ifp, char *name, u32 *data)
 285 {
 286         __le32 data_le = cpu_to_le32(*data);
 287         s32 err;
 288
 289         err = brcmf_fil_iovar_data_get(ifp, name, &data_le, sizeof(data_le));
 290         if (err == 0)
 291                 *data = le32_to_cpu(data_le);
 292         return err;
 293 }
 294
 295 static u32
 296 brcmf_create_bsscfg(s32 bssidx, char *name, char *data, u32 datalen, char *buf,
 297                     u32 buflen)
 298 {
 299         const s8 *prefix = "bsscfg:";
 300         s8 *p;
 301         u32 prefixlen;
 302         u32 namelen;
 303         u32 iolen;
 304         __le32 bssidx_le;
 305
 306         if (bssidx == 0)
 307                 return brcmf_create_iovar(name, data, datalen, buf, buflen);
 308
 309         prefixlen = strlen(prefix);
 310         namelen = strlen(name) + 1; /* lengh of iovar  name + null */
 311         iolen = prefixlen + namelen + sizeof(bssidx_le) + datalen;
 312
 313         if (buflen < iolen) {
 314                 brcmf_err("buffer is too short\n");
 315                 return 0;
 316         }
 317
 318         p = buf;
 319
 320         /* copy prefix, no null */
 321         memcpy(p, prefix, prefixlen);
 322         p += prefixlen;
 323
 324         /* copy iovar name including null */
 325         memcpy(p, name, namelen);
 326         p += namelen;
 327
 328         /* bss config index as first data */
 329         bssidx_le = cpu_to_le32(bssidx);
 330         memcpy(p, &bssidx_le, sizeof(bssidx_le));
 331         p += sizeof(bssidx_le);
 332
 333         /* parameter buffer follows */
 334         if (datalen)
 335                 memcpy(p, data, datalen);
 336
 337         return iolen;
 338 }
 339
 340 s32
 341 brcmf_fil_bsscfg_data_set(struct brcmf_if *ifp, char *name,
 342                           void *data, u32 len)
 343 {
 344         struct brcmf_pub *drvr = ifp->drvr;
 345         s32 err;
 346         u32 buflen;
 347
 348         mutex_lock(&drvr->proto_block);
 349
 350         brcmf_dbg(FIL, "ifidx=%d, bssidx=%d, name=%s, len=%d\n", ifp->ifidx,
 351                   ifp->bssidx, name, len);
 352         brcmf_dbg_hex_dump(BRCMF_FIL_ON(), data,
 353                            min_t(uint, len, MAX_HEX_DUMP_LEN), "data\n");
 354
 355         buflen = brcmf_create_bsscfg(ifp->bssidx, name, data, len,
 356                                      drvr->proto_buf, sizeof(drvr->proto_buf));
 357         if (buflen) {
 358                 err = brcmf_fil_cmd_data(ifp, BRCMF_C_SET_VAR, drvr->proto_buf,
 359                                          buflen, true);
 360         } else {
 361                 err = -EPERM;
 362                 brcmf_err("Creating bsscfg failed\n");
 363         }
 364
 365         mutex_unlock(&drvr->proto_block);
 366         return err;
 367 }
 368
 369 s32
 370 brcmf_fil_bsscfg_data_get(struct brcmf_if *ifp, char *name,
 371                           void *data, u32 len)
 372 {
 373         struct brcmf_pub *drvr = ifp->drvr;
 374         s32 err;
 375         u32 buflen;
 376
 377         mutex_lock(&drvr->proto_block);
 378
 379         buflen = brcmf_create_bsscfg(ifp->bssidx, name, data, len,
 380                                      drvr->proto_buf, sizeof(drvr->proto_buf));
 381         if (buflen) {
 382                 err = brcmf_fil_cmd_data(ifp, BRCMF_C_GET_VAR, drvr->proto_buf,
 383                                          buflen, false);
 384                 if (err == 0)
 385                         memcpy(data, drvr->proto_buf, len);
 386         } else {
 387                 err = -EPERM;
 388                 brcmf_err("Creating bsscfg failed\n");
 389         }
 390         brcmf_dbg(FIL, "ifidx=%d, bssidx=%d, name=%s, len=%d\n", ifp->ifidx,
 391                   ifp->bssidx, name, len);
 392         brcmf_dbg_hex_dump(BRCMF_FIL_ON(), data,
 393                            min_t(uint, len, MAX_HEX_DUMP_LEN), "data\n");
 394
 395         mutex_unlock(&drvr->proto_block);
 396         return err;
 397
 398 }
 399
 400 s32
 401 brcmf_fil_bsscfg_int_set(struct brcmf_if *ifp, char *name, u32 data)
 402 {
 403         __le32 data_le = cpu_to_le32(data);
 404
 405         return brcmf_fil_bsscfg_data_set(ifp, name, &data_le,
 406                                          sizeof(data_le));
 407 }
 408
 409 s32
 410 brcmf_fil_bsscfg_int_get(struct brcmf_if *ifp, char *name, u32 *data)
 411 {
 412         __le32 data_le = cpu_to_le32(*data);
 413         s32 err;
 414
 415         err = brcmf_fil_bsscfg_data_get(ifp, name, &data_le,
 416                                         sizeof(data_le));
 417         if (err == 0)
 418                 *data = le32_to_cpu(data_le);
 419         return err;
 420 }