drivers/net/wireless/brcm80211/brcmfmac/dhd_common.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 <linux/kernel.h>
  18 #include <linux/string.h>
  19 #include <linux/netdevice.h>
  20 #include <brcmu_wifi.h>
  21 #include <brcmu_utils.h>
  22 #include "dhd.h"
  23 #include "dhd_bus.h"
  24 #include "dhd_dbg.h"
  25 #include "fwil.h"
  26 #include "tracepoint.h"
  27
  28 #define PKTFILTER_BUF_SIZE              128
  29 #define BRCMF_DEFAULT_BCN_TIMEOUT       3
  30 #define BRCMF_DEFAULT_SCAN_CHANNEL_TIME 40
  31 #define BRCMF_DEFAULT_SCAN_UNASSOC_TIME 40
  32 #define BRCMF_DEFAULT_PACKET_FILTER     "100 0 0 0 0x01 0x00"
  33
  34 #ifdef DEBUG
  35 static const char brcmf_version[] =
  36         "Dongle Host Driver, version " BRCMF_VERSION_STR "\nCompiled on "
  37         __DATE__ " at " __TIME__;
  38 #else
  39 static const char brcmf_version[] =
  40         "Dongle Host Driver, version " BRCMF_VERSION_STR;
  41 #endif
  42
  43
  44 bool brcmf_c_prec_enq(struct device *dev, struct pktq *q,
  45                       struct sk_buff *pkt, int prec)
  46 {
  47         struct sk_buff *p;
  48         int eprec = -1;         /* precedence to evict from */
  49         bool discard_oldest;
  50         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
  51         struct brcmf_pub *drvr = bus_if->drvr;
  52
  53         /* Fast case, precedence queue is not full and we are also not
  54          * exceeding total queue length
  55          */
  56         if (!pktq_pfull(q, prec) && !pktq_full(q)) {
  57                 brcmu_pktq_penq(q, prec, pkt);
  58                 return true;
  59         }
  60
  61         /* Determine precedence from which to evict packet, if any */
  62         if (pktq_pfull(q, prec))
  63                 eprec = prec;
  64         else if (pktq_full(q)) {
  65                 p = brcmu_pktq_peek_tail(q, &eprec);
  66                 if (eprec > prec)
  67                         return false;
  68         }
  69
  70         /* Evict if needed */
  71         if (eprec >= 0) {
  72                 /* Detect queueing to unconfigured precedence */
  73                 discard_oldest = ac_bitmap_tst(drvr->wme_dp, eprec);
  74                 if (eprec == prec && !discard_oldest)
  75                         return false;   /* refuse newer (incoming) packet */
  76                 /* Evict packet according to discard policy */
  77                 p = discard_oldest ? brcmu_pktq_pdeq(q, eprec) :
  78                         brcmu_pktq_pdeq_tail(q, eprec);
  79                 if (p == NULL)
  80                         brcmf_err("brcmu_pktq_penq() failed, oldest %d\n",
  81                                   discard_oldest);
  82
  83                 brcmu_pkt_buf_free_skb(p);
  84         }
  85
  86         /* Enqueue */
  87         p = brcmu_pktq_penq(q, prec, pkt);
  88         if (p == NULL)
  89                 brcmf_err("brcmu_pktq_penq() failed\n");
  90
  91         return p != NULL;
  92 }
  93
  94 /* Convert user's input in hex pattern to byte-size mask */
  95 static int brcmf_c_pattern_atoh(char *src, char *dst)
  96 {
  97         int i;
  98         if (strncmp(src, "0x", 2) != 0 && strncmp(src, "0X", 2) != 0) {
  99                 brcmf_err("Mask invalid format. Needs to start with 0x\n");
 100                 return -EINVAL;
 101         }
 102         src = src + 2;          /* Skip past 0x */
 103         if (strlen(src) % 2 != 0) {
 104                 brcmf_err("Mask invalid format. Length must be even.\n");
 105                 return -EINVAL;
 106         }
 107         for (i = 0; *src != '\0'; i++) {
 108                 unsigned long res;
 109                 char num[3];
 110                 strncpy(num, src, 2);
 111                 num[2] = '\0';
 112                 if (kstrtoul(num, 16, &res))
 113                         return -EINVAL;
 114                 dst[i] = (u8)res;
 115                 src += 2;
 116         }
 117         return i;
 118 }
 119
 120 static void
 121 brcmf_c_pktfilter_offload_enable(struct brcmf_if *ifp, char *arg, int enable,
 122                                  int master_mode)
 123 {
 124         unsigned long res;
 125         char *argv;
 126         char *arg_save = NULL, *arg_org = NULL;
 127         s32 err;
 128         struct brcmf_pkt_filter_enable_le enable_parm;
 129
 130         arg_save = kstrdup(arg, GFP_ATOMIC);
 131         if (!arg_save)
 132                 goto fail;
 133
 134         arg_org = arg_save;
 135
 136         argv = strsep(&arg_save, " ");
 137
 138         if (argv == NULL) {
 139                 brcmf_err("No args provided\n");
 140                 goto fail;
 141         }
 142
 143         /* Parse packet filter id. */
 144         enable_parm.id = 0;
 145         if (!kstrtoul(argv, 0, &res))
 146                 enable_parm.id = cpu_to_le32((u32)res);
 147
 148         /* Enable/disable the specified filter. */
 149         enable_parm.enable = cpu_to_le32(enable);
 150
 151         err = brcmf_fil_iovar_data_set(ifp, "pkt_filter_enable", &enable_parm,
 152                                        sizeof(enable_parm));
 153         if (err)
 154                 brcmf_err("Set pkt_filter_enable error (%d)\n", err);
 155
 156         /* Control the master mode */
 157         err = brcmf_fil_iovar_int_set(ifp, "pkt_filter_mode", master_mode);
 158         if (err)
 159                 brcmf_err("Set pkt_filter_mode error (%d)\n", err);
 160
 161 fail:
 162         kfree(arg_org);
 163 }
 164
 165 static void brcmf_c_pktfilter_offload_set(struct brcmf_if *ifp, char *arg)
 166 {
 167         struct brcmf_pkt_filter_le *pkt_filter;
 168         unsigned long res;
 169         int buf_len;
 170         s32 err;
 171         u32 mask_size;
 172         u32 pattern_size;
 173         char *argv[8], *buf = NULL;
 174         int i = 0;
 175         char *arg_save = NULL, *arg_org = NULL;
 176
 177         arg_save = kstrdup(arg, GFP_ATOMIC);
 178         if (!arg_save)
 179                 goto fail;
 180
 181         arg_org = arg_save;
 182
 183         buf = kmalloc(PKTFILTER_BUF_SIZE, GFP_ATOMIC);
 184         if (!buf)
 185                 goto fail;
 186
 187         argv[i] = strsep(&arg_save, " ");
 188         while (argv[i]) {
 189                 i++;
 190                 if (i >= 8) {
 191                         brcmf_err("Too many parameters\n");
 192                         goto fail;
 193                 }
 194                 argv[i] = strsep(&arg_save, " ");
 195         }
 196
 197         if (i != 6) {
 198                 brcmf_err("Not enough args provided %d\n", i);
 199                 goto fail;
 200         }
 201
 202         pkt_filter = (struct brcmf_pkt_filter_le *)buf;
 203
 204         /* Parse packet filter id. */
 205         pkt_filter->id = 0;
 206         if (!kstrtoul(argv[0], 0, &res))
 207                 pkt_filter->id = cpu_to_le32((u32)res);
 208
 209         /* Parse filter polarity. */
 210         pkt_filter->negate_match = 0;
 211         if (!kstrtoul(argv[1], 0, &res))
 212                 pkt_filter->negate_match = cpu_to_le32((u32)res);
 213
 214         /* Parse filter type. */
 215         pkt_filter->type = 0;
 216         if (!kstrtoul(argv[2], 0, &res))
 217                 pkt_filter->type = cpu_to_le32((u32)res);
 218
 219         /* Parse pattern filter offset. */
 220         pkt_filter->u.pattern.offset = 0;
 221         if (!kstrtoul(argv[3], 0, &res))
 222                 pkt_filter->u.pattern.offset = cpu_to_le32((u32)res);
 223
 224         /* Parse pattern filter mask. */
 225         mask_size = brcmf_c_pattern_atoh(argv[4],
 226                         (char *)pkt_filter->u.pattern.mask_and_pattern);
 227
 228         /* Parse pattern filter pattern. */
 229         pattern_size = brcmf_c_pattern_atoh(argv[5],
 230                 (char *)&pkt_filter->u.pattern.mask_and_pattern[mask_size]);
 231
 232         if (mask_size != pattern_size) {
 233                 brcmf_err("Mask and pattern not the same size\n");
 234                 goto fail;
 235         }
 236
 237         pkt_filter->u.pattern.size_bytes = cpu_to_le32(mask_size);
 238         buf_len = offsetof(struct brcmf_pkt_filter_le,
 239                            u.pattern.mask_and_pattern);
 240         buf_len += mask_size + pattern_size;
 241
 242         err = brcmf_fil_iovar_data_set(ifp, "pkt_filter_add", pkt_filter,
 243                                        buf_len);
 244         if (err)
 245                 brcmf_err("Set pkt_filter_add error (%d)\n", err);
 246
 247 fail:
 248         kfree(arg_org);
 249
 250         kfree(buf);
 251 }
 252
 253 int brcmf_c_preinit_dcmds(struct brcmf_if *ifp)
 254 {
 255         s8 eventmask[BRCMF_EVENTING_MASK_LEN];
 256         u8 buf[BRCMF_DCMD_SMLEN];
 257         char *ptr;
 258         s32 err;
 259
 260         /* retreive mac address */
 261         err = brcmf_fil_iovar_data_get(ifp, "cur_etheraddr", ifp->mac_addr,
 262                                        sizeof(ifp->mac_addr));
 263         if (err < 0) {
 264                 brcmf_err("Retreiving cur_etheraddr failed, %d\n",
 265                           err);
 266                 goto done;
 267         }
 268         memcpy(ifp->drvr->mac, ifp->mac_addr, sizeof(ifp->drvr->mac));
 269
 270         /* query for 'ver' to get version info from firmware */
 271         memset(buf, 0, sizeof(buf));
 272         strcpy(buf, "ver");
 273         err = brcmf_fil_iovar_data_get(ifp, "ver", buf, sizeof(buf));
 274         if (err < 0) {
 275                 brcmf_err("Retreiving version information failed, %d\n",
 276                           err);
 277                 goto done;
 278         }
 279         ptr = (char *)buf;
 280         strsep(&ptr, "\n");
 281
 282         /* Print fw version info */
 283         brcmf_err("Firmware version = %s\n", buf);
 284
 285         /* locate firmware version number for ethtool */
 286         ptr = strrchr(buf, ' ') + 1;
 287         strlcpy(ifp->drvr->fwver, ptr, sizeof(ifp->drvr->fwver));
 288
 289         /*
 290          * Setup timeout if Beacons are lost and roam is off to report
 291          * link down
 292          */
 293         err = brcmf_fil_iovar_int_set(ifp, "bcn_timeout",
 294                                       BRCMF_DEFAULT_BCN_TIMEOUT);
 295         if (err) {
 296                 brcmf_err("bcn_timeout error (%d)\n", err);
 297                 goto done;
 298         }
 299
 300         /* Enable/Disable build-in roaming to allowed ext supplicant to take
 301          * of romaing
 302          */
 303         err = brcmf_fil_iovar_int_set(ifp, "roam_off", 1);
 304         if (err) {
 305                 brcmf_err("roam_off error (%d)\n", err);
 306                 goto done;
 307         }
 308
 309         /* Setup event_msgs, enable E_IF */
 310         err = brcmf_fil_iovar_data_get(ifp, "event_msgs", eventmask,
 311                                        BRCMF_EVENTING_MASK_LEN);
 312         if (err) {
 313                 brcmf_err("Get event_msgs error (%d)\n", err);
 314                 goto done;
 315         }
 316         setbit(eventmask, BRCMF_E_IF);
 317         err = brcmf_fil_iovar_data_set(ifp, "event_msgs", eventmask,
 318                                        BRCMF_EVENTING_MASK_LEN);
 319         if (err) {
 320                 brcmf_err("Set event_msgs error (%d)\n", err);
 321                 goto done;
 322         }
 323
 324         /* Setup default scan channel time */
 325         err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCAN_CHANNEL_TIME,
 326                                     BRCMF_DEFAULT_SCAN_CHANNEL_TIME);
 327         if (err) {
 328                 brcmf_err("BRCMF_C_SET_SCAN_CHANNEL_TIME error (%d)\n",
 329                           err);
 330                 goto done;
 331         }
 332
 333         /* Setup default scan unassoc time */
 334         err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCAN_UNASSOC_TIME,
 335                                     BRCMF_DEFAULT_SCAN_UNASSOC_TIME);
 336         if (err) {
 337                 brcmf_err("BRCMF_C_SET_SCAN_UNASSOC_TIME error (%d)\n",
 338                           err);
 339                 goto done;
 340         }
 341
 342         /* Setup packet filter */
 343         brcmf_c_pktfilter_offload_set(ifp, BRCMF_DEFAULT_PACKET_FILTER);
 344         brcmf_c_pktfilter_offload_enable(ifp, BRCMF_DEFAULT_PACKET_FILTER,
 345                                          0, true);
 346
 347         /* do bus specific preinit here */
 348         err = brcmf_bus_preinit(ifp->drvr->bus_if);
 349 done:
 350         return err;
 351 }
 352
 353 #ifdef CONFIG_BRCM_TRACING
 354 void __brcmf_err(const char *func, const char *fmt, ...)
 355 {
 356         struct va_format vaf = {
 357                 .fmt = fmt,
 358         };
 359         va_list args;
 360
 361         va_start(args, fmt);
 362         vaf.va = &args;
 363         pr_err("%s: %pV", func, &vaf);
 364         trace_brcmf_err(func, &vaf);
 365         va_end(args);
 366 }
 367 #endif
 368 #if defined(CONFIG_BRCM_TRACING) || defined(CONFIG_BRCMDBG)
 369 void __brcmf_dbg(u32 level, const char *func, const char *fmt, ...)
 370 {
 371         struct va_format vaf = {
 372                 .fmt = fmt,
 373         };
 374         va_list args;
 375
 376         va_start(args, fmt);
 377         vaf.va = &args;
 378         if (brcmf_msg_level & level)
 379                 pr_debug("%s %pV", func, &vaf);
 380         trace_brcmf_dbg(level, func, &vaf);
 381         va_end(args);
 382 }
 383 #endif