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  * IOCTL request handler to send function init/shutdown command
  59  * to firmware.
  60  *
  61  * This function prepares the correct firmware command and
  62  * issues it.
  63  */
  64 int mwifiex_misc_ioctl_init_shutdown(struct mwifiex_adapter *adapter,
  65                                      struct mwifiex_wait_queue *wait,
  66                                      u32 func_init_shutdown)
  67 {
  68         struct mwifiex_private *priv = adapter->priv[wait->bss_index];
  69         int ret;
  70         u16 cmd;
  71
  72         if (func_init_shutdown == MWIFIEX_FUNC_INIT) {
  73                 cmd = HostCmd_CMD_FUNC_INIT;
  74         } else if (func_init_shutdown == MWIFIEX_FUNC_SHUTDOWN) {
  75                 cmd = HostCmd_CMD_FUNC_SHUTDOWN;
  76         } else {
  77                 dev_err(adapter->dev, "unsupported parameter\n");
  78                 return -1;
  79         }
  80
  81         /* Send command to firmware */
  82         ret = mwifiex_prepare_cmd(priv, cmd, HostCmd_ACT_GEN_SET,
  83                                   0, wait, NULL);
  84
  85         if (!ret)
  86                 ret = -EINPROGRESS;
  87
  88         return ret;
  89 }
  90
  91 /*
  92  * IOCTL request handler to set/get debug information.
  93  *
  94  * This function collates/sets the information from/to different driver
  95  * structures.
  96  */
  97 int mwifiex_get_debug_info(struct mwifiex_private *priv,
  98                            struct mwifiex_debug_info *info)
  99 {
 100         struct mwifiex_adapter *adapter = priv->adapter;
 101
 102         if (info) {
 103                 memcpy(info->packets_out,
 104                        priv->wmm.packets_out,
 105                        sizeof(priv->wmm.packets_out));
 106                 info->max_tx_buf_size = (u32) adapter->max_tx_buf_size;
 107                 info->tx_buf_size = (u32) adapter->tx_buf_size;
 108                 info->rx_tbl_num = mwifiex_get_rx_reorder_tbl(
 109                                         priv, info->rx_tbl);
 110                 info->tx_tbl_num = mwifiex_get_tx_ba_stream_tbl(
 111                                         priv, info->tx_tbl);
 112                 info->ps_mode = adapter->ps_mode;
 113                 info->ps_state = adapter->ps_state;
 114                 info->is_deep_sleep = adapter->is_deep_sleep;
 115                 info->pm_wakeup_card_req = adapter->pm_wakeup_card_req;
 116                 info->pm_wakeup_fw_try = adapter->pm_wakeup_fw_try;
 117                 info->is_hs_configured = adapter->is_hs_configured;
 118                 info->hs_activated = adapter->hs_activated;
 119                 info->num_cmd_host_to_card_failure
 120                         = adapter->dbg.num_cmd_host_to_card_failure;
 121                 info->num_cmd_sleep_cfm_host_to_card_failure
 122                         = adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure;
 123                 info->num_tx_host_to_card_failure
 124                         = adapter->dbg.num_tx_host_to_card_failure;
 125                 info->num_event_deauth = adapter->dbg.num_event_deauth;
 126                 info->num_event_disassoc = adapter->dbg.num_event_disassoc;
 127                 info->num_event_link_lost = adapter->dbg.num_event_link_lost;
 128                 info->num_cmd_deauth = adapter->dbg.num_cmd_deauth;
 129                 info->num_cmd_assoc_success =
 130                         adapter->dbg.num_cmd_assoc_success;
 131                 info->num_cmd_assoc_failure =
 132                         adapter->dbg.num_cmd_assoc_failure;
 133                 info->num_tx_timeout = adapter->dbg.num_tx_timeout;
 134                 info->num_cmd_timeout = adapter->dbg.num_cmd_timeout;
 135                 info->timeout_cmd_id = adapter->dbg.timeout_cmd_id;
 136                 info->timeout_cmd_act = adapter->dbg.timeout_cmd_act;
 137                 memcpy(info->last_cmd_id, adapter->dbg.last_cmd_id,
 138                        sizeof(adapter->dbg.last_cmd_id));
 139                 memcpy(info->last_cmd_act, adapter->dbg.last_cmd_act,
 140                        sizeof(adapter->dbg.last_cmd_act));
 141                 info->last_cmd_index = adapter->dbg.last_cmd_index;
 142                 memcpy(info->last_cmd_resp_id, adapter->dbg.last_cmd_resp_id,
 143                        sizeof(adapter->dbg.last_cmd_resp_id));
 144                 info->last_cmd_resp_index = adapter->dbg.last_cmd_resp_index;
 145                 memcpy(info->last_event, adapter->dbg.last_event,
 146                        sizeof(adapter->dbg.last_event));
 147                 info->last_event_index = adapter->dbg.last_event_index;
 148                 info->data_sent = adapter->data_sent;
 149                 info->cmd_sent = adapter->cmd_sent;
 150                 info->cmd_resp_received = adapter->cmd_resp_received;
 151         }
 152
 153         return 0;
 154 }
 155
 156 /*
 157  * This function processes the received packet before sending it to the
 158  * kernel.
 159  *
 160  * It extracts the SKB from the received buffer and sends it to kernel.
 161  * In case the received buffer does not contain the data in SKB format,
 162  * the function creates a blank SKB, fills it with the data from the
 163  * received buffer and then sends this new SKB to the kernel.
 164  */
 165 int mwifiex_recv_packet(struct mwifiex_adapter *adapter, struct sk_buff *skb)
 166 {
 167         struct mwifiex_rxinfo *rx_info = NULL;
 168         struct mwifiex_private *priv = NULL;
 169
 170         if (!skb)
 171                 return -1;
 172
 173         rx_info = MWIFIEX_SKB_RXCB(skb);
 174         priv = mwifiex_bss_index_to_priv(adapter, rx_info->bss_index);
 175         if (!priv)
 176                 return -1;
 177
 178         skb->dev = priv->netdev;
 179         skb->protocol = eth_type_trans(skb, priv->netdev);
 180         skb->ip_summed = CHECKSUM_NONE;
 181         priv->stats.rx_bytes += skb->len;
 182         priv->stats.rx_packets++;
 183         if (in_interrupt())
 184                 netif_rx(skb);
 185         else
 186                 netif_rx_ni(skb);
 187
 188         return 0;
 189 }
 190
 191 /*
 192  * Receive packet completion callback handler.
 193  *
 194  * This function updates the statistics and frees the buffer SKB.
 195  */
 196 int mwifiex_recv_complete(struct mwifiex_adapter *adapter,
 197                           struct sk_buff *skb, int status)
 198 {
 199         struct mwifiex_private *priv = NULL;
 200         struct mwifiex_rxinfo *rx_info = NULL;
 201
 202         if (!skb)
 203                 return 0;
 204
 205         rx_info = MWIFIEX_SKB_RXCB(skb);
 206         priv = mwifiex_bss_index_to_priv(adapter, rx_info->bss_index);
 207
 208         if (priv && (status == -1))
 209                 priv->stats.rx_dropped++;
 210
 211         dev_kfree_skb_any(skb);
 212
 213         return 0;
 214 }
 215
 216 /*
 217  * IOCTL completion callback handler.
 218  *
 219  * This function is called when a pending IOCTL is completed.
 220  *
 221  * If work queue support is enabled, the function wakes up the
 222  * corresponding waiting function. Otherwise, it processes the
 223  * IOCTL response and frees the response buffer.
 224  */
 225 int mwifiex_ioctl_complete(struct mwifiex_adapter *adapter,
 226                            struct mwifiex_wait_queue *wait_queue,
 227                            int status)
 228 {
 229         enum mwifiex_error_code status_code =
 230                 (enum mwifiex_error_code) wait_queue->status;
 231
 232         atomic_dec(&adapter->ioctl_pending);
 233
 234         dev_dbg(adapter->dev, "cmd: IOCTL completed: status=%d,"
 235                         " status_code=%#x\n", status, status_code);
 236
 237         if (wait_queue->enabled) {
 238                 *wait_queue->condition = true;
 239                 wait_queue->status = status;
 240                 if (status && (status_code == MWIFIEX_ERROR_CMD_TIMEOUT))
 241                         dev_err(adapter->dev, "cmd timeout\n");
 242                 else
 243                         wake_up_interruptible(wait_queue->wait);
 244         } else {
 245                 if (status)
 246                         dev_err(adapter->dev, "cmd failed: status_code=%#x\n",
 247                                status_code);
 248                 kfree(wait_queue);
 249         }
 250
 251         return 0;
 252 }