drivers/net/wireless/mwifiex/util.c

   1 /*
   2  * Marvell Wireless LAN device driver: utility functions
   3  *
   4  * Copyright (C) 2011-2014, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "decl.h"
  21 #include "ioctl.h"
  22 #include "util.h"
  23 #include "fw.h"
  24 #include "main.h"
  25 #include "wmm.h"
  26 #include "11n.h"
  27
  28 /*
  29  * Firmware initialization complete callback handler.
  30  *
  31  * This function wakes up the function waiting on the init
  32  * wait queue for the firmware initialization to complete.
  33  */
  34 int mwifiex_init_fw_complete(struct mwifiex_adapter *adapter)
  35 {
  36
  37         adapter->init_wait_q_woken = true;
  38         wake_up_interruptible(&adapter->init_wait_q);
  39         return 0;
  40 }
  41
  42 /*
  43  * Firmware shutdown complete callback handler.
  44  *
  45  * This function sets the hardware status to not ready and wakes up
  46  * the function waiting on the init wait queue for the firmware
  47  * shutdown to complete.
  48  */
  49 int mwifiex_shutdown_fw_complete(struct mwifiex_adapter *adapter)
  50 {
  51         adapter->hw_status = MWIFIEX_HW_STATUS_NOT_READY;
  52         adapter->init_wait_q_woken = true;
  53         wake_up_interruptible(&adapter->init_wait_q);
  54         return 0;
  55 }
  56
  57 /*
  58  * This function sends init/shutdown command
  59  * to firmware.
  60  */
  61 int mwifiex_init_shutdown_fw(struct mwifiex_private *priv,
  62                              u32 func_init_shutdown)
  63 {
  64         u16 cmd;
  65
  66         if (func_init_shutdown == MWIFIEX_FUNC_INIT) {
  67                 cmd = HostCmd_CMD_FUNC_INIT;
  68         } else if (func_init_shutdown == MWIFIEX_FUNC_SHUTDOWN) {
  69                 cmd = HostCmd_CMD_FUNC_SHUTDOWN;
  70         } else {
  71                 dev_err(priv->adapter->dev, "unsupported parameter\n");
  72                 return -1;
  73         }
  74
  75         return mwifiex_send_cmd(priv, cmd, HostCmd_ACT_GEN_SET, 0, NULL, true);
  76 }
  77 EXPORT_SYMBOL_GPL(mwifiex_init_shutdown_fw);
  78
  79 /*
  80  * IOCTL request handler to set/get debug information.
  81  *
  82  * This function collates/sets the information from/to different driver
  83  * structures.
  84  */
  85 int mwifiex_get_debug_info(struct mwifiex_private *priv,
  86                            struct mwifiex_debug_info *info)
  87 {
  88         struct mwifiex_adapter *adapter = priv->adapter;
  89
  90         if (info) {
  91                 memcpy(info->packets_out,
  92                        priv->wmm.packets_out,
  93                        sizeof(priv->wmm.packets_out));
  94                 info->curr_tx_buf_size = (u32) adapter->curr_tx_buf_size;
  95                 info->tx_buf_size = (u32) adapter->tx_buf_size;
  96                 info->rx_tbl_num = mwifiex_get_rx_reorder_tbl(priv,
  97                                                               info->rx_tbl);
  98                 info->tx_tbl_num = mwifiex_get_tx_ba_stream_tbl(priv,
  99                                                                 info->tx_tbl);
 100                 info->tdls_peer_num = mwifiex_get_tdls_list(priv,
 101                                                             info->tdls_list);
 102                 info->ps_mode = adapter->ps_mode;
 103                 info->ps_state = adapter->ps_state;
 104                 info->is_deep_sleep = adapter->is_deep_sleep;
 105                 info->pm_wakeup_card_req = adapter->pm_wakeup_card_req;
 106                 info->pm_wakeup_fw_try = adapter->pm_wakeup_fw_try;
 107                 info->is_hs_configured = adapter->is_hs_configured;
 108                 info->hs_activated = adapter->hs_activated;
 109                 info->is_cmd_timedout = adapter->is_cmd_timedout;
 110                 info->num_cmd_host_to_card_failure
 111                                 = adapter->dbg.num_cmd_host_to_card_failure;
 112                 info->num_cmd_sleep_cfm_host_to_card_failure
 113                         = adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure;
 114                 info->num_tx_host_to_card_failure
 115                                 = adapter->dbg.num_tx_host_to_card_failure;
 116                 info->num_event_deauth = adapter->dbg.num_event_deauth;
 117                 info->num_event_disassoc = adapter->dbg.num_event_disassoc;
 118                 info->num_event_link_lost = adapter->dbg.num_event_link_lost;
 119                 info->num_cmd_deauth = adapter->dbg.num_cmd_deauth;
 120                 info->num_cmd_assoc_success =
 121                                         adapter->dbg.num_cmd_assoc_success;
 122                 info->num_cmd_assoc_failure =
 123                                         adapter->dbg.num_cmd_assoc_failure;
 124                 info->num_tx_timeout = adapter->dbg.num_tx_timeout;
 125                 info->timeout_cmd_id = adapter->dbg.timeout_cmd_id;
 126                 info->timeout_cmd_act = adapter->dbg.timeout_cmd_act;
 127                 memcpy(info->last_cmd_id, adapter->dbg.last_cmd_id,
 128                        sizeof(adapter->dbg.last_cmd_id));
 129                 memcpy(info->last_cmd_act, adapter->dbg.last_cmd_act,
 130                        sizeof(adapter->dbg.last_cmd_act));
 131                 info->last_cmd_index = adapter->dbg.last_cmd_index;
 132                 memcpy(info->last_cmd_resp_id, adapter->dbg.last_cmd_resp_id,
 133                        sizeof(adapter->dbg.last_cmd_resp_id));
 134                 info->last_cmd_resp_index = adapter->dbg.last_cmd_resp_index;
 135                 memcpy(info->last_event, adapter->dbg.last_event,
 136                        sizeof(adapter->dbg.last_event));
 137                 info->last_event_index = adapter->dbg.last_event_index;
 138                 info->data_sent = adapter->data_sent;
 139                 info->cmd_sent = adapter->cmd_sent;
 140                 info->cmd_resp_received = adapter->cmd_resp_received;
 141         }
 142
 143         return 0;
 144 }
 145
 146 static int
 147 mwifiex_parse_mgmt_packet(struct mwifiex_private *priv, u8 *payload, u16 len,
 148                           struct rxpd *rx_pd)
 149 {
 150         u16 stype;
 151         u8 category, action_code;
 152         struct ieee80211_hdr *ieee_hdr = (void *)payload;
 153
 154         stype = (le16_to_cpu(ieee_hdr->frame_control) & IEEE80211_FCTL_STYPE);
 155
 156         switch (stype) {
 157         case IEEE80211_STYPE_ACTION:
 158                 category = *(payload + sizeof(struct ieee80211_hdr));
 159                 action_code = *(payload + sizeof(struct ieee80211_hdr) + 1);
 160                 if (category == WLAN_CATEGORY_PUBLIC &&
 161                     action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
 162                         dev_dbg(priv->adapter->dev,
 163                                 "TDLS discovery response %pM nf=%d, snr=%d\n",
 164                                 ieee_hdr->addr2, rx_pd->nf, rx_pd->snr);
 165                         mwifiex_auto_tdls_update_peer_signal(priv,
 166                                                              ieee_hdr->addr2,
 167                                                              rx_pd->snr,
 168                                                              rx_pd->nf);
 169                 }
 170                 break;
 171         default:
 172                 dev_dbg(priv->adapter->dev,
 173                         "unknown mgmt frame subytpe %#x\n", stype);
 174         }
 175
 176         return 0;
 177 }
 178 /*
 179  * This function processes the received management packet and send it
 180  * to the kernel.
 181  */
 182 int
 183 mwifiex_process_mgmt_packet(struct mwifiex_private *priv,
 184                             struct sk_buff *skb)
 185 {
 186         struct rxpd *rx_pd;
 187         u16 pkt_len;
 188         struct ieee80211_hdr *ieee_hdr;
 189
 190         if (!skb)
 191                 return -1;
 192
 193         rx_pd = (struct rxpd *)skb->data;
 194
 195         skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset));
 196         skb_pull(skb, sizeof(pkt_len));
 197
 198         pkt_len = le16_to_cpu(rx_pd->rx_pkt_length);
 199
 200         ieee_hdr = (void *)skb->data;
 201         if (ieee80211_is_mgmt(ieee_hdr->frame_control)) {
 202                 mwifiex_parse_mgmt_packet(priv, (u8 *)ieee_hdr,
 203                                           pkt_len, rx_pd);
 204         }
 205         /* Remove address4 */
 206         memmove(skb->data + sizeof(struct ieee80211_hdr_3addr),
 207                 skb->data + sizeof(struct ieee80211_hdr),
 208                 pkt_len - sizeof(struct ieee80211_hdr));
 209
 210         pkt_len -= ETH_ALEN + sizeof(pkt_len);
 211         rx_pd->rx_pkt_length = cpu_to_le16(pkt_len);
 212
 213         cfg80211_rx_mgmt(priv->wdev, priv->roc_cfg.chan.center_freq,
 214                          CAL_RSSI(rx_pd->snr, rx_pd->nf), skb->data, pkt_len,
 215                          0);
 216
 217         return 0;
 218 }
 219
 220 /*
 221  * This function processes the received packet before sending it to the
 222  * kernel.
 223  *
 224  * It extracts the SKB from the received buffer and sends it to kernel.
 225  * In case the received buffer does not contain the data in SKB format,
 226  * the function creates a blank SKB, fills it with the data from the
 227  * received buffer and then sends this new SKB to the kernel.
 228  */
 229 int mwifiex_recv_packet(struct mwifiex_private *priv, struct sk_buff *skb)
 230 {
 231         if (!skb)
 232                 return -1;
 233
 234         priv->stats.rx_bytes += skb->len;
 235         priv->stats.rx_packets++;
 236
 237         skb->dev = priv->netdev;
 238         skb->protocol = eth_type_trans(skb, priv->netdev);
 239         skb->ip_summed = CHECKSUM_NONE;
 240
 241         /* This is required only in case of 11n and USB/PCIE as we alloc
 242          * a buffer of 4K only if its 11N (to be able to receive 4K
 243          * AMSDU packets). In case of SD we allocate buffers based
 244          * on the size of packet and hence this is not needed.
 245          *
 246          * Modifying the truesize here as our allocation for each
 247          * skb is 4K but we only receive 2K packets and this cause
 248          * the kernel to start dropping packets in case where
 249          * application has allocated buffer based on 2K size i.e.
 250          * if there a 64K packet received (in IP fragments and
 251          * application allocates 64K to receive this packet but
 252          * this packet would almost double up because we allocate
 253          * each 1.5K fragment in 4K and pass it up. As soon as the
 254          * 64K limit hits kernel will start to drop rest of the
 255          * fragments. Currently we fail the Filesndl-ht.scr script
 256          * for UDP, hence this fix
 257          */
 258         if ((priv->adapter->iface_type == MWIFIEX_USB ||
 259              priv->adapter->iface_type == MWIFIEX_PCIE) &&
 260             (skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE))
 261                 skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE);
 262
 263         if (in_interrupt())
 264                 netif_rx(skb);
 265         else
 266                 netif_rx_ni(skb);
 267
 268         return 0;
 269 }
 270
 271 /*
 272  * IOCTL completion callback handler.
 273  *
 274  * This function is called when a pending IOCTL is completed.
 275  *
 276  * If work queue support is enabled, the function wakes up the
 277  * corresponding waiting function. Otherwise, it processes the
 278  * IOCTL response and frees the response buffer.
 279  */
 280 int mwifiex_complete_cmd(struct mwifiex_adapter *adapter,
 281                          struct cmd_ctrl_node *cmd_node)
 282 {
 283         dev_dbg(adapter->dev, "cmd completed: status=%d\n",
 284                 adapter->cmd_wait_q.status);
 285
 286         *(cmd_node->condition) = true;
 287
 288         if (adapter->cmd_wait_q.status == -ETIMEDOUT)
 289                 dev_err(adapter->dev, "cmd timeout\n");
 290         else
 291                 wake_up_interruptible(&adapter->cmd_wait_q.wait);
 292
 293         return 0;
 294 }
 295
 296 /* This function will return the pointer to station entry in station list
 297  * table which matches specified mac address.
 298  * This function should be called after acquiring RA list spinlock.
 299  * NULL is returned if station entry is not found in associated STA list.
 300  */
 301 struct mwifiex_sta_node *
 302 mwifiex_get_sta_entry(struct mwifiex_private *priv, const u8 *mac)
 303 {
 304         struct mwifiex_sta_node *node;
 305
 306         if (!mac)
 307                 return NULL;
 308
 309         list_for_each_entry(node, &priv->sta_list, list) {
 310                 if (!memcmp(node->mac_addr, mac, ETH_ALEN))
 311                         return node;
 312         }
 313
 314         return NULL;
 315 }
 316
 317 /* This function will add a sta_node entry to associated station list
 318  * table with the given mac address.
 319  * If entry exist already, existing entry is returned.
 320  * If received mac address is NULL, NULL is returned.
 321  */
 322 struct mwifiex_sta_node *
 323 mwifiex_add_sta_entry(struct mwifiex_private *priv, const u8 *mac)
 324 {
 325         struct mwifiex_sta_node *node;
 326         unsigned long flags;
 327
 328         if (!mac)
 329                 return NULL;
 330
 331         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 332         node = mwifiex_get_sta_entry(priv, mac);
 333         if (node)
 334                 goto done;
 335
 336         node = kzalloc(sizeof(*node), GFP_ATOMIC);
 337         if (!node)
 338                 goto done;
 339
 340         memcpy(node->mac_addr, mac, ETH_ALEN);
 341         list_add_tail(&node->list, &priv->sta_list);
 342
 343 done:
 344         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 345         return node;
 346 }
 347
 348 /* This function will search for HT IE in association request IEs
 349  * and set station HT parameters accordingly.
 350  */
 351 void
 352 mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies,
 353                        int ies_len, struct mwifiex_sta_node *node)
 354 {
 355         const struct ieee80211_ht_cap *ht_cap;
 356
 357         if (!ies)
 358                 return;
 359
 360         ht_cap = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies, ies_len);
 361         if (ht_cap) {
 362                 node->is_11n_enabled = 1;
 363                 node->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
 364                                   IEEE80211_HT_CAP_MAX_AMSDU ?
 365                                   MWIFIEX_TX_DATA_BUF_SIZE_8K :
 366                                   MWIFIEX_TX_DATA_BUF_SIZE_4K;
 367         } else {
 368                 node->is_11n_enabled = 0;
 369         }
 370
 371         return;
 372 }
 373
 374 /* This function will delete a station entry from station list */
 375 void mwifiex_del_sta_entry(struct mwifiex_private *priv, const u8 *mac)
 376 {
 377         struct mwifiex_sta_node *node;
 378         unsigned long flags;
 379
 380         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 381
 382         node = mwifiex_get_sta_entry(priv, mac);
 383         if (node) {
 384                 list_del(&node->list);
 385                 kfree(node);
 386         }
 387
 388         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 389         return;
 390 }
 391
 392 /* This function will delete all stations from associated station list. */
 393 void mwifiex_del_all_sta_list(struct mwifiex_private *priv)
 394 {
 395         struct mwifiex_sta_node *node, *tmp;
 396         unsigned long flags;
 397
 398         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 399
 400         list_for_each_entry_safe(node, tmp, &priv->sta_list, list) {
 401                 list_del(&node->list);
 402                 kfree(node);
 403         }
 404
 405         INIT_LIST_HEAD(&priv->sta_list);
 406         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 407         return;
 408 }
 409
 410 /* This function adds histogram data to histogram array*/
 411 void mwifiex_hist_data_add(struct mwifiex_private *priv,
 412                            u8 rx_rate, s8 snr, s8 nflr)
 413 {
 414         struct mwifiex_histogram_data *phist_data = priv->hist_data;
 415
 416         if (atomic_read(&phist_data->num_samples) > MWIFIEX_HIST_MAX_SAMPLES)
 417                 mwifiex_hist_data_reset(priv);
 418         mwifiex_hist_data_set(priv, rx_rate, snr, nflr);
 419 }
 420
 421 /* function to add histogram record */
 422 void mwifiex_hist_data_set(struct mwifiex_private *priv, u8 rx_rate, s8 snr,
 423                            s8 nflr)
 424 {
 425         struct mwifiex_histogram_data *phist_data = priv->hist_data;
 426
 427         atomic_inc(&phist_data->num_samples);
 428         atomic_inc(&phist_data->rx_rate[rx_rate]);
 429         atomic_inc(&phist_data->snr[snr]);
 430         atomic_inc(&phist_data->noise_flr[128 + nflr]);
 431         atomic_inc(&phist_data->sig_str[nflr - snr]);
 432 }
 433
 434 /* function to reset histogram data during init/reset */
 435 void mwifiex_hist_data_reset(struct mwifiex_private *priv)
 436 {
 437         int ix;
 438         struct mwifiex_histogram_data *phist_data = priv->hist_data;
 439
 440         atomic_set(&phist_data->num_samples, 0);
 441         for (ix = 0; ix < MWIFIEX_MAX_AC_RX_RATES; ix++)
 442                 atomic_set(&phist_data->rx_rate[ix], 0);
 443         for (ix = 0; ix < MWIFIEX_MAX_SNR; ix++)
 444                 atomic_set(&phist_data->snr[ix], 0);
 445         for (ix = 0; ix < MWIFIEX_MAX_NOISE_FLR; ix++)
 446                 atomic_set(&phist_data->noise_flr[ix], 0);
 447         for (ix = 0; ix < MWIFIEX_MAX_SIG_STRENGTH; ix++)
 448                 atomic_set(&phist_data->sig_str[ix], 0);
 449 }