drivers/net/wireless/mwifiex/util.c

   1 /*
   2  * Marvell Wireless LAN device driver: utility functions
   3  *
   4  * Copyright (C) 2011, 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 /*
 145  * This function processes the received management packet and send it
 146  * to the kernel.
 147  */
 148 int
 149 mwifiex_process_mgmt_packet(struct mwifiex_private *priv,
 150                             struct sk_buff *skb)
 151 {
 152         struct rxpd *rx_pd;
 153         u16 pkt_len;
 154
 155         if (!skb)
 156                 return -1;
 157
 158         rx_pd = (struct rxpd *)skb->data;
 159
 160         skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset));
 161         skb_pull(skb, sizeof(pkt_len));
 162
 163         pkt_len = le16_to_cpu(rx_pd->rx_pkt_length);
 164
 165         /* Remove address4 */
 166         memmove(skb->data + sizeof(struct ieee80211_hdr_3addr),
 167                 skb->data + sizeof(struct ieee80211_hdr),
 168                 pkt_len - sizeof(struct ieee80211_hdr));
 169
 170         pkt_len -= ETH_ALEN + sizeof(pkt_len);
 171         rx_pd->rx_pkt_length = cpu_to_le16(pkt_len);
 172
 173         cfg80211_rx_mgmt(priv->wdev, priv->roc_cfg.chan.center_freq,
 174                          CAL_RSSI(rx_pd->snr, rx_pd->nf), skb->data, pkt_len,
 175                          0, GFP_ATOMIC);
 176
 177         return 0;
 178 }
 179
 180 /*
 181  * This function processes the received packet before sending it to the
 182  * kernel.
 183  *
 184  * It extracts the SKB from the received buffer and sends it to kernel.
 185  * In case the received buffer does not contain the data in SKB format,
 186  * the function creates a blank SKB, fills it with the data from the
 187  * received buffer and then sends this new SKB to the kernel.
 188  */
 189 int mwifiex_recv_packet(struct mwifiex_private *priv, struct sk_buff *skb)
 190 {
 191         if (!skb)
 192                 return -1;
 193
 194         priv->stats.rx_bytes += skb->len;
 195         priv->stats.rx_packets++;
 196
 197         skb->dev = priv->netdev;
 198         skb->protocol = eth_type_trans(skb, priv->netdev);
 199         skb->ip_summed = CHECKSUM_NONE;
 200
 201         /* This is required only in case of 11n and USB/PCIE as we alloc
 202          * a buffer of 4K only if its 11N (to be able to receive 4K
 203          * AMSDU packets). In case of SD we allocate buffers based
 204          * on the size of packet and hence this is not needed.
 205          *
 206          * Modifying the truesize here as our allocation for each
 207          * skb is 4K but we only receive 2K packets and this cause
 208          * the kernel to start dropping packets in case where
 209          * application has allocated buffer based on 2K size i.e.
 210          * if there a 64K packet received (in IP fragments and
 211          * application allocates 64K to receive this packet but
 212          * this packet would almost double up because we allocate
 213          * each 1.5K fragment in 4K and pass it up. As soon as the
 214          * 64K limit hits kernel will start to drop rest of the
 215          * fragments. Currently we fail the Filesndl-ht.scr script
 216          * for UDP, hence this fix
 217          */
 218         if ((priv->adapter->iface_type == MWIFIEX_USB ||
 219              priv->adapter->iface_type == MWIFIEX_PCIE) &&
 220             (skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE))
 221                 skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE);
 222
 223         if (in_interrupt())
 224                 netif_rx(skb);
 225         else
 226                 netif_rx_ni(skb);
 227
 228         return 0;
 229 }
 230
 231 /*
 232  * IOCTL completion callback handler.
 233  *
 234  * This function is called when a pending IOCTL is completed.
 235  *
 236  * If work queue support is enabled, the function wakes up the
 237  * corresponding waiting function. Otherwise, it processes the
 238  * IOCTL response and frees the response buffer.
 239  */
 240 int mwifiex_complete_cmd(struct mwifiex_adapter *adapter,
 241                          struct cmd_ctrl_node *cmd_node)
 242 {
 243         dev_dbg(adapter->dev, "cmd completed: status=%d\n",
 244                 adapter->cmd_wait_q.status);
 245
 246         *(cmd_node->condition) = true;
 247
 248         if (adapter->cmd_wait_q.status == -ETIMEDOUT)
 249                 dev_err(adapter->dev, "cmd timeout\n");
 250         else
 251                 wake_up_interruptible(&adapter->cmd_wait_q.wait);
 252
 253         return 0;
 254 }
 255
 256 /* This function will return the pointer to station entry in station list
 257  * table which matches specified mac address.
 258  * This function should be called after acquiring RA list spinlock.
 259  * NULL is returned if station entry is not found in associated STA list.
 260  */
 261 struct mwifiex_sta_node *
 262 mwifiex_get_sta_entry(struct mwifiex_private *priv, const u8 *mac)
 263 {
 264         struct mwifiex_sta_node *node;
 265
 266         if (!mac)
 267                 return NULL;
 268
 269         list_for_each_entry(node, &priv->sta_list, list) {
 270                 if (!memcmp(node->mac_addr, mac, ETH_ALEN))
 271                         return node;
 272         }
 273
 274         return NULL;
 275 }
 276
 277 /* This function will add a sta_node entry to associated station list
 278  * table with the given mac address.
 279  * If entry exist already, existing entry is returned.
 280  * If received mac address is NULL, NULL is returned.
 281  */
 282 struct mwifiex_sta_node *
 283 mwifiex_add_sta_entry(struct mwifiex_private *priv, const u8 *mac)
 284 {
 285         struct mwifiex_sta_node *node;
 286         unsigned long flags;
 287
 288         if (!mac)
 289                 return NULL;
 290
 291         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 292         node = mwifiex_get_sta_entry(priv, mac);
 293         if (node)
 294                 goto done;
 295
 296         node = kzalloc(sizeof(*node), GFP_ATOMIC);
 297         if (!node)
 298                 goto done;
 299
 300         memcpy(node->mac_addr, mac, ETH_ALEN);
 301         list_add_tail(&node->list, &priv->sta_list);
 302
 303 done:
 304         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 305         return node;
 306 }
 307
 308 /* This function will search for HT IE in association request IEs
 309  * and set station HT parameters accordingly.
 310  */
 311 void
 312 mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies,
 313                        int ies_len, struct mwifiex_sta_node *node)
 314 {
 315         const struct ieee80211_ht_cap *ht_cap;
 316
 317         if (!ies)
 318                 return;
 319
 320         ht_cap = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies, ies_len);
 321         if (ht_cap) {
 322                 node->is_11n_enabled = 1;
 323                 node->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
 324                                   IEEE80211_HT_CAP_MAX_AMSDU ?
 325                                   MWIFIEX_TX_DATA_BUF_SIZE_8K :
 326                                   MWIFIEX_TX_DATA_BUF_SIZE_4K;
 327         } else {
 328                 node->is_11n_enabled = 0;
 329         }
 330
 331         return;
 332 }
 333
 334 /* This function will delete a station entry from station list */
 335 void mwifiex_del_sta_entry(struct mwifiex_private *priv, const u8 *mac)
 336 {
 337         struct mwifiex_sta_node *node;
 338         unsigned long flags;
 339
 340         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 341
 342         node = mwifiex_get_sta_entry(priv, mac);
 343         if (node) {
 344                 list_del(&node->list);
 345                 kfree(node);
 346         }
 347
 348         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 349         return;
 350 }
 351
 352 /* This function will delete all stations from associated station list. */
 353 void mwifiex_del_all_sta_list(struct mwifiex_private *priv)
 354 {
 355         struct mwifiex_sta_node *node, *tmp;
 356         unsigned long flags;
 357
 358         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 359
 360         list_for_each_entry_safe(node, tmp, &priv->sta_list, list) {
 361                 list_del(&node->list);
 362                 kfree(node);
 363         }
 364
 365         INIT_LIST_HEAD(&priv->sta_list);
 366         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 367         return;
 368 }