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->ps_mode = adapter->ps_mode;
 101                 info->ps_state = adapter->ps_state;
 102                 info->is_deep_sleep = adapter->is_deep_sleep;
 103                 info->pm_wakeup_card_req = adapter->pm_wakeup_card_req;
 104                 info->pm_wakeup_fw_try = adapter->pm_wakeup_fw_try;
 105                 info->is_hs_configured = adapter->is_hs_configured;
 106                 info->hs_activated = adapter->hs_activated;
 107                 info->is_cmd_timedout = adapter->is_cmd_timedout;
 108                 info->num_cmd_host_to_card_failure
 109                                 = adapter->dbg.num_cmd_host_to_card_failure;
 110                 info->num_cmd_sleep_cfm_host_to_card_failure
 111                         = adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure;
 112                 info->num_tx_host_to_card_failure
 113                                 = adapter->dbg.num_tx_host_to_card_failure;
 114                 info->num_event_deauth = adapter->dbg.num_event_deauth;
 115                 info->num_event_disassoc = adapter->dbg.num_event_disassoc;
 116                 info->num_event_link_lost = adapter->dbg.num_event_link_lost;
 117                 info->num_cmd_deauth = adapter->dbg.num_cmd_deauth;
 118                 info->num_cmd_assoc_success =
 119                                         adapter->dbg.num_cmd_assoc_success;
 120                 info->num_cmd_assoc_failure =
 121                                         adapter->dbg.num_cmd_assoc_failure;
 122                 info->num_tx_timeout = adapter->dbg.num_tx_timeout;
 123                 info->timeout_cmd_id = adapter->dbg.timeout_cmd_id;
 124                 info->timeout_cmd_act = adapter->dbg.timeout_cmd_act;
 125                 memcpy(info->last_cmd_id, adapter->dbg.last_cmd_id,
 126                        sizeof(adapter->dbg.last_cmd_id));
 127                 memcpy(info->last_cmd_act, adapter->dbg.last_cmd_act,
 128                        sizeof(adapter->dbg.last_cmd_act));
 129                 info->last_cmd_index = adapter->dbg.last_cmd_index;
 130                 memcpy(info->last_cmd_resp_id, adapter->dbg.last_cmd_resp_id,
 131                        sizeof(adapter->dbg.last_cmd_resp_id));
 132                 info->last_cmd_resp_index = adapter->dbg.last_cmd_resp_index;
 133                 memcpy(info->last_event, adapter->dbg.last_event,
 134                        sizeof(adapter->dbg.last_event));
 135                 info->last_event_index = adapter->dbg.last_event_index;
 136                 info->data_sent = adapter->data_sent;
 137                 info->cmd_sent = adapter->cmd_sent;
 138                 info->cmd_resp_received = adapter->cmd_resp_received;
 139         }
 140
 141         return 0;
 142 }
 143
 144 static int
 145 mwifiex_parse_mgmt_packet(struct mwifiex_private *priv, u8 *payload, u16 len,
 146                           struct rxpd *rx_pd)
 147 {
 148         u16 stype;
 149         u8 category, action_code;
 150         struct ieee80211_hdr *ieee_hdr = (void *)payload;
 151
 152         stype = (le16_to_cpu(ieee_hdr->frame_control) & IEEE80211_FCTL_STYPE);
 153
 154         switch (stype) {
 155         case IEEE80211_STYPE_ACTION:
 156                 category = *(payload + sizeof(struct ieee80211_hdr));
 157                 action_code = *(payload + sizeof(struct ieee80211_hdr) + 1);
 158                 if (category == WLAN_CATEGORY_PUBLIC &&
 159                     action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
 160                         dev_dbg(priv->adapter->dev,
 161                                 "TDLS discovery response %pM nf=%d, snr=%d\n",
 162                                 ieee_hdr->addr2, rx_pd->nf, rx_pd->snr);
 163                         mwifiex_auto_tdls_update_peer_signal(priv,
 164                                                              ieee_hdr->addr2,
 165                                                              rx_pd->snr,
 166                                                              rx_pd->nf);
 167                 }
 168                 break;
 169         default:
 170                 dev_dbg(priv->adapter->dev,
 171                         "unknown mgmt frame subytpe %#x\n", stype);
 172         }
 173
 174         return 0;
 175 }
 176 /*
 177  * This function processes the received management packet and send it
 178  * to the kernel.
 179  */
 180 int
 181 mwifiex_process_mgmt_packet(struct mwifiex_private *priv,
 182                             struct sk_buff *skb)
 183 {
 184         struct rxpd *rx_pd;
 185         u16 pkt_len;
 186         struct ieee80211_hdr *ieee_hdr;
 187
 188         if (!skb)
 189                 return -1;
 190
 191         rx_pd = (struct rxpd *)skb->data;
 192
 193         skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset));
 194         skb_pull(skb, sizeof(pkt_len));
 195
 196         pkt_len = le16_to_cpu(rx_pd->rx_pkt_length);
 197
 198         ieee_hdr = (void *)skb->data;
 199         if (ieee80211_is_mgmt(ieee_hdr->frame_control)) {
 200                 mwifiex_parse_mgmt_packet(priv, (u8 *)ieee_hdr,
 201                                           pkt_len, rx_pd);
 202         }
 203         /* Remove address4 */
 204         memmove(skb->data + sizeof(struct ieee80211_hdr_3addr),
 205                 skb->data + sizeof(struct ieee80211_hdr),
 206                 pkt_len - sizeof(struct ieee80211_hdr));
 207
 208         pkt_len -= ETH_ALEN + sizeof(pkt_len);
 209         rx_pd->rx_pkt_length = cpu_to_le16(pkt_len);
 210
 211         cfg80211_rx_mgmt(priv->wdev, priv->roc_cfg.chan.center_freq,
 212                          CAL_RSSI(rx_pd->snr, rx_pd->nf), skb->data, pkt_len,
 213                          0);
 214
 215         return 0;
 216 }
 217
 218 /*
 219  * This function processes the received packet before sending it to the
 220  * kernel.
 221  *
 222  * It extracts the SKB from the received buffer and sends it to kernel.
 223  * In case the received buffer does not contain the data in SKB format,
 224  * the function creates a blank SKB, fills it with the data from the
 225  * received buffer and then sends this new SKB to the kernel.
 226  */
 227 int mwifiex_recv_packet(struct mwifiex_private *priv, struct sk_buff *skb)
 228 {
 229         if (!skb)
 230                 return -1;
 231
 232         priv->stats.rx_bytes += skb->len;
 233         priv->stats.rx_packets++;
 234
 235         skb->dev = priv->netdev;
 236         skb->protocol = eth_type_trans(skb, priv->netdev);
 237         skb->ip_summed = CHECKSUM_NONE;
 238
 239         /* This is required only in case of 11n and USB/PCIE as we alloc
 240          * a buffer of 4K only if its 11N (to be able to receive 4K
 241          * AMSDU packets). In case of SD we allocate buffers based
 242          * on the size of packet and hence this is not needed.
 243          *
 244          * Modifying the truesize here as our allocation for each
 245          * skb is 4K but we only receive 2K packets and this cause
 246          * the kernel to start dropping packets in case where
 247          * application has allocated buffer based on 2K size i.e.
 248          * if there a 64K packet received (in IP fragments and
 249          * application allocates 64K to receive this packet but
 250          * this packet would almost double up because we allocate
 251          * each 1.5K fragment in 4K and pass it up. As soon as the
 252          * 64K limit hits kernel will start to drop rest of the
 253          * fragments. Currently we fail the Filesndl-ht.scr script
 254          * for UDP, hence this fix
 255          */
 256         if ((priv->adapter->iface_type == MWIFIEX_USB ||
 257              priv->adapter->iface_type == MWIFIEX_PCIE) &&
 258             (skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE))
 259                 skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE);
 260
 261         if (in_interrupt())
 262                 netif_rx(skb);
 263         else
 264                 netif_rx_ni(skb);
 265
 266         return 0;
 267 }
 268
 269 /*
 270  * IOCTL completion callback handler.
 271  *
 272  * This function is called when a pending IOCTL is completed.
 273  *
 274  * If work queue support is enabled, the function wakes up the
 275  * corresponding waiting function. Otherwise, it processes the
 276  * IOCTL response and frees the response buffer.
 277  */
 278 int mwifiex_complete_cmd(struct mwifiex_adapter *adapter,
 279                          struct cmd_ctrl_node *cmd_node)
 280 {
 281         dev_dbg(adapter->dev, "cmd completed: status=%d\n",
 282                 adapter->cmd_wait_q.status);
 283
 284         *(cmd_node->condition) = true;
 285
 286         if (adapter->cmd_wait_q.status == -ETIMEDOUT)
 287                 dev_err(adapter->dev, "cmd timeout\n");
 288         else
 289                 wake_up_interruptible(&adapter->cmd_wait_q.wait);
 290
 291         return 0;
 292 }
 293
 294 /* This function will return the pointer to station entry in station list
 295  * table which matches specified mac address.
 296  * This function should be called after acquiring RA list spinlock.
 297  * NULL is returned if station entry is not found in associated STA list.
 298  */
 299 struct mwifiex_sta_node *
 300 mwifiex_get_sta_entry(struct mwifiex_private *priv, const u8 *mac)
 301 {
 302         struct mwifiex_sta_node *node;
 303
 304         if (!mac)
 305                 return NULL;
 306
 307         list_for_each_entry(node, &priv->sta_list, list) {
 308                 if (!memcmp(node->mac_addr, mac, ETH_ALEN))
 309                         return node;
 310         }
 311
 312         return NULL;
 313 }
 314
 315 /* This function will add a sta_node entry to associated station list
 316  * table with the given mac address.
 317  * If entry exist already, existing entry is returned.
 318  * If received mac address is NULL, NULL is returned.
 319  */
 320 struct mwifiex_sta_node *
 321 mwifiex_add_sta_entry(struct mwifiex_private *priv, const u8 *mac)
 322 {
 323         struct mwifiex_sta_node *node;
 324         unsigned long flags;
 325
 326         if (!mac)
 327                 return NULL;
 328
 329         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 330         node = mwifiex_get_sta_entry(priv, mac);
 331         if (node)
 332                 goto done;
 333
 334         node = kzalloc(sizeof(*node), GFP_ATOMIC);
 335         if (!node)
 336                 goto done;
 337
 338         memcpy(node->mac_addr, mac, ETH_ALEN);
 339         list_add_tail(&node->list, &priv->sta_list);
 340
 341 done:
 342         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 343         return node;
 344 }
 345
 346 /* This function will search for HT IE in association request IEs
 347  * and set station HT parameters accordingly.
 348  */
 349 void
 350 mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies,
 351                        int ies_len, struct mwifiex_sta_node *node)
 352 {
 353         const struct ieee80211_ht_cap *ht_cap;
 354
 355         if (!ies)
 356                 return;
 357
 358         ht_cap = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies, ies_len);
 359         if (ht_cap) {
 360                 node->is_11n_enabled = 1;
 361                 node->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
 362                                   IEEE80211_HT_CAP_MAX_AMSDU ?
 363                                   MWIFIEX_TX_DATA_BUF_SIZE_8K :
 364                                   MWIFIEX_TX_DATA_BUF_SIZE_4K;
 365         } else {
 366                 node->is_11n_enabled = 0;
 367         }
 368
 369         return;
 370 }
 371
 372 /* This function will delete a station entry from station list */
 373 void mwifiex_del_sta_entry(struct mwifiex_private *priv, const u8 *mac)
 374 {
 375         struct mwifiex_sta_node *node;
 376         unsigned long flags;
 377
 378         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 379
 380         node = mwifiex_get_sta_entry(priv, mac);
 381         if (node) {
 382                 list_del(&node->list);
 383                 kfree(node);
 384         }
 385
 386         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 387         return;
 388 }
 389
 390 /* This function will delete all stations from associated station list. */
 391 void mwifiex_del_all_sta_list(struct mwifiex_private *priv)
 392 {
 393         struct mwifiex_sta_node *node, *tmp;
 394         unsigned long flags;
 395
 396         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 397
 398         list_for_each_entry_safe(node, tmp, &priv->sta_list, list) {
 399                 list_del(&node->list);
 400                 kfree(node);
 401         }
 402
 403         INIT_LIST_HEAD(&priv->sta_list);
 404         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 405         return;
 406 }