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_sync(priv, cmd, HostCmd_ACT_GEN_SET, 0, NULL);
  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->max_tx_buf_size = (u32) adapter->max_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->num_cmd_host_to_card_failure
 108                                 = adapter->dbg.num_cmd_host_to_card_failure;
 109                 info->num_cmd_sleep_cfm_host_to_card_failure
 110                         = adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure;
 111                 info->num_tx_host_to_card_failure
 112                                 = adapter->dbg.num_tx_host_to_card_failure;
 113                 info->num_event_deauth = adapter->dbg.num_event_deauth;
 114                 info->num_event_disassoc = adapter->dbg.num_event_disassoc;
 115                 info->num_event_link_lost = adapter->dbg.num_event_link_lost;
 116                 info->num_cmd_deauth = adapter->dbg.num_cmd_deauth;
 117                 info->num_cmd_assoc_success =
 118                                         adapter->dbg.num_cmd_assoc_success;
 119                 info->num_cmd_assoc_failure =
 120                                         adapter->dbg.num_cmd_assoc_failure;
 121                 info->num_tx_timeout = adapter->dbg.num_tx_timeout;
 122                 info->num_cmd_timeout = adapter->dbg.num_cmd_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_adapter *adapter,
 150                             struct sk_buff *skb)
 151 {
 152         struct rxpd *rx_pd;
 153         struct mwifiex_private *priv;
 154         u16 pkt_len;
 155
 156         if (!skb)
 157                 return -1;
 158
 159         rx_pd = (struct rxpd *)skb->data;
 160         priv = mwifiex_get_priv_by_id(adapter, rx_pd->bss_num, rx_pd->bss_type);
 161         if (!priv)
 162                 return -1;
 163
 164         skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset));
 165         skb_pull(skb, sizeof(pkt_len));
 166
 167         pkt_len = le16_to_cpu(rx_pd->rx_pkt_length);
 168
 169         /* Remove address4 */
 170         memmove(skb->data + sizeof(struct ieee80211_hdr_3addr),
 171                 skb->data + sizeof(struct ieee80211_hdr),
 172                 pkt_len - sizeof(struct ieee80211_hdr));
 173
 174         pkt_len -= ETH_ALEN + sizeof(pkt_len);
 175         rx_pd->rx_pkt_length = cpu_to_le16(pkt_len);
 176
 177         cfg80211_rx_mgmt(priv->wdev, priv->roc_cfg.chan.center_freq,
 178                          CAL_RSSI(rx_pd->snr, rx_pd->nf),
 179                          skb->data, pkt_len, GFP_ATOMIC);
 180
 181         return 0;
 182 }
 183
 184 /*
 185  * This function processes the received packet before sending it to the
 186  * kernel.
 187  *
 188  * It extracts the SKB from the received buffer and sends it to kernel.
 189  * In case the received buffer does not contain the data in SKB format,
 190  * the function creates a blank SKB, fills it with the data from the
 191  * received buffer and then sends this new SKB to the kernel.
 192  */
 193 int mwifiex_recv_packet(struct mwifiex_adapter *adapter, struct sk_buff *skb)
 194 {
 195         struct mwifiex_rxinfo *rx_info;
 196         struct mwifiex_private *priv;
 197
 198         if (!skb)
 199                 return -1;
 200
 201         rx_info = MWIFIEX_SKB_RXCB(skb);
 202         priv = mwifiex_get_priv_by_id(adapter, rx_info->bss_num,
 203                                       rx_info->bss_type);
 204         if (!priv)
 205                 return -1;
 206
 207         skb->dev = priv->netdev;
 208         skb->protocol = eth_type_trans(skb, priv->netdev);
 209         skb->ip_summed = CHECKSUM_NONE;
 210
 211         /* This is required only in case of 11n and USB as we alloc
 212          * a buffer of 4K only if its 11N (to be able to receive 4K
 213          * AMSDU packets). In case of SD we allocate buffers based
 214          * on the size of packet and hence this is not needed.
 215          *
 216          * Modifying the truesize here as our allocation for each
 217          * skb is 4K but we only receive 2K packets and this cause
 218          * the kernel to start dropping packets in case where
 219          * application has allocated buffer based on 2K size i.e.
 220          * if there a 64K packet received (in IP fragments and
 221          * application allocates 64K to receive this packet but
 222          * this packet would almost double up because we allocate
 223          * each 1.5K fragment in 4K and pass it up. As soon as the
 224          * 64K limit hits kernel will start to drop rest of the
 225          * fragments. Currently we fail the Filesndl-ht.scr script
 226          * for UDP, hence this fix
 227          */
 228         if ((adapter->iface_type == MWIFIEX_USB) &&
 229             (skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE))
 230                 skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE);
 231
 232         priv->stats.rx_bytes += skb->len;
 233         priv->stats.rx_packets++;
 234         if (in_interrupt())
 235                 netif_rx(skb);
 236         else
 237                 netif_rx_ni(skb);
 238
 239         return 0;
 240 }
 241
 242 /*
 243  * IOCTL completion callback handler.
 244  *
 245  * This function is called when a pending IOCTL is completed.
 246  *
 247  * If work queue support is enabled, the function wakes up the
 248  * corresponding waiting function. Otherwise, it processes the
 249  * IOCTL response and frees the response buffer.
 250  */
 251 int mwifiex_complete_cmd(struct mwifiex_adapter *adapter,
 252                          struct cmd_ctrl_node *cmd_node)
 253 {
 254         atomic_dec(&adapter->cmd_pending);
 255         dev_dbg(adapter->dev, "cmd completed: status=%d\n",
 256                 adapter->cmd_wait_q.status);
 257
 258         *(cmd_node->condition) = true;
 259
 260         if (adapter->cmd_wait_q.status == -ETIMEDOUT)
 261                 dev_err(adapter->dev, "cmd timeout\n");
 262         else
 263                 wake_up_interruptible(&adapter->cmd_wait_q.wait);
 264
 265         return 0;
 266 }