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 */ 34int 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 */ 49int 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 */ 61int 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} 77EXPORT_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 */ 85int 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 */ 148int 149mwifiex_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); 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 */ 189int 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 */ 240int 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 */ 261struct mwifiex_sta_node * 262mwifiex_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 */ 282struct mwifiex_sta_node * 283mwifiex_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 303done: 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 */ 311void 312mwifiex_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 */ 335void 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. */ 353void 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} 369