/*
* Marvell Wireless LAN device driver: utility functions
*
* Copyright (C) 2011-2014, Marvell International Ltd.
*
* This software file (the "File") is distributed by Marvell International
* Ltd. under the terms of the GNU General Public License Version 2, June 1991
* (the "License"). You may use, redistribute and/or modify this File in
* accordance with the terms and conditions of the License, a copy of which
* is available by writing to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
*
* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
* this warranty disclaimer.
*/
#include "decl.h"
#include "ioctl.h"
#include "util.h"
#include "fw.h"
#include "main.h"
#include "wmm.h"
#include "11n.h"
/*
* Firmware initialization complete callback handler.
*
* This function wakes up the function waiting on the init
* wait queue for the firmware initialization to complete.
*/
int mwifiex_init_fw_complete(struct mwifiex_adapter *adapter)
{
adapter->init_wait_q_woken = true;
wake_up_interruptible(&adapter->init_wait_q);
return 0;
}
/*
* Firmware shutdown complete callback handler.
*
* This function sets the hardware status to not ready and wakes up
* the function waiting on the init wait queue for the firmware
* shutdown to complete.
*/
int mwifiex_shutdown_fw_complete(struct mwifiex_adapter *adapter)
{
adapter->hw_status = MWIFIEX_HW_STATUS_NOT_READY;
adapter->init_wait_q_woken = true;
wake_up_interruptible(&adapter->init_wait_q);
return 0;
}
/*
* This function sends init/shutdown command
* to firmware.
*/
int mwifiex_init_shutdown_fw(struct mwifiex_private *priv,
u32 func_init_shutdown)
{
u16 cmd;
if (func_init_shutdown == MWIFIEX_FUNC_INIT) {
cmd = HostCmd_CMD_FUNC_INIT;
} else if (func_init_shutdown == MWIFIEX_FUNC_SHUTDOWN) {
cmd = HostCmd_CMD_FUNC_SHUTDOWN;
} else {
dev_err(priv->adapter->dev, "unsupported parameter\n");
return -1;
}
return mwifiex_send_cmd(priv, cmd, HostCmd_ACT_GEN_SET, 0, NULL, true);
}
EXPORT_SYMBOL_GPL(mwifiex_init_shutdown_fw);
/*
* IOCTL request handler to set/get debug information.
*
* This function collates/sets the information from/to different driver
* structures.
*/
int mwifiex_get_debug_info(struct mwifiex_private *priv,
struct mwifiex_debug_info *info)
{
struct mwifiex_adapter *adapter = priv->adapter;
if (info) {
memcpy(info->packets_out,
priv->wmm.packets_out,
sizeof(priv->wmm.packets_out));
info->curr_tx_buf_size = (u32) adapter->curr_tx_buf_size;
info->tx_buf_size = (u32) adapter->tx_buf_size;
info->rx_tbl_num = mwifiex_get_rx_reorder_tbl(priv,
info->rx_tbl);
info->tx_tbl_num = mwifiex_get_tx_ba_stream_tbl(priv,
info->tx_tbl);
info->ps_mode = adapter->ps_mode;
info->ps_state = adapter->ps_state;
info->is_deep_sleep = adapter->is_deep_sleep;
info->pm_wakeup_card_req = adapter->pm_wakeup_card_req;
info->pm_wakeup_fw_try = adapter->pm_wakeup_fw_try;
info->is_hs_configured = adapter->is_hs_configured;
info->hs_activated = adapter->hs_activated;
info->is_cmd_timedout = adapter->is_cmd_timedout;
info->num_cmd_host_to_card_failure
= adapter->dbg.num_cmd_host_to_card_failure;
info->num_cmd_sleep_cfm_host_to_card_failure
= adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure;
info->num_tx_host_to_card_failure
= adapter->dbg.num_tx_host_to_card_failure;
info->num_event_deauth = adapter->dbg.num_event_deauth;
info->num_event_disassoc = adapter->dbg.num_event_disassoc;
info->num_event_link_lost = adapter->dbg.num_event_link_lost;
info->num_cmd_deauth = adapter->dbg.num_cmd_deauth;
info->num_cmd_assoc_success =
adapter->dbg.num_cmd_assoc_success;
info->num_cmd_assoc_failure =
adapter->dbg.num_cmd_assoc_failure;
info->num_tx_timeout = adapter->dbg.num_tx_timeout;
info->timeout_cmd_id = adapter->dbg.timeout_cmd_id;
info->timeout_cmd_act = adapter->dbg.timeout_cmd_act;
memcpy(info->last_cmd_id, adapter->dbg.last_cmd_id,
sizeof(adapter->dbg.last_cmd_id));
memcpy(info->last_cmd_act, adapter->dbg.last_cmd_act,
sizeof(adapter->dbg.last_cmd_act));
info->last_cmd_index = adapter->dbg.last_cmd_index;
memcpy(info->last_cmd_resp_id, adapter->dbg.last_cmd_resp_id,
sizeof(adapter->dbg.last_cmd_resp_id));
info->last_cmd_resp_index = adapter->dbg.last_cmd_resp_index;
memcpy(info->last_event, adapter->dbg.last_event,
sizeof(adapter->dbg.last_event));
info->last_event_index = adapter->dbg.last_event_index;
info->data_sent = adapter->data_sent;
info->cmd_sent = adapter->cmd_sent;
info->cmd_resp_received = adapter->cmd_resp_received;
}
return 0;
}
static int
mwifiex_parse_mgmt_packet(struct mwifiex_private *priv, u8 *payload, u16 len,
struct rxpd *rx_pd)
{
u16 stype;
u8 category, action_code;
struct ieee80211_hdr *ieee_hdr = (void *)payload;
stype = (cpu_to_le16(ieee_hdr->frame_control) & IEEE80211_FCTL_STYPE);
switch (stype) {
case IEEE80211_STYPE_ACTION:
category = *(payload + sizeof(struct ieee80211_hdr));
action_code = *(payload + sizeof(struct ieee80211_hdr) + 1);
if (category == WLAN_CATEGORY_PUBLIC &&
action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
dev_dbg(priv->adapter->dev,
"TDLS discovery response %pM nf=%d, snr=%d\n",
ieee_hdr->addr2, rx_pd->nf, rx_pd->snr);
mwifiex_auto_tdls_update_peer_signal(priv,
ieee_hdr->addr2,
rx_pd->snr,
rx_pd->nf);
}
break;
default:
dev_dbg(priv->adapter->dev,
"unknown mgmt frame subytpe %#x\n", stype);
}
return 0;
}
/*
* This function processes the received management packet and send it
* to the kernel.
*/
int
mwifiex_process_mgmt_packet(struct mwifiex_private *priv,
struct sk_buff *skb)
{
struct rxpd *rx_pd;
u16 pkt_len;
struct ieee80211_hdr *ieee_hdr;
if (!skb)
return -1;
rx_pd = (struct rxpd *)skb->data;
skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset));
skb_pull(skb, sizeof(pkt_len));
pkt_len = le16_to_cpu(rx_pd->rx_pkt_length);
ieee_hdr = (void *)skb->data;
if (ieee80211_is_mgmt(ieee_hdr->frame_control)) {
mwifiex_parse_mgmt_packet(priv, (u8 *)ieee_hdr,
pkt_len, rx_pd);
}
/* Remove address4 */
memmove(skb->data + sizeof(struct ieee80211_hdr_3addr),
skb->data + sizeof(struct ieee80211_hdr),
pkt_len - sizeof(struct ieee80211_hdr));
pkt_len -= ETH_ALEN + sizeof(pkt_len);
rx_pd->rx_pkt_length = cpu_to_le16(pkt_len);
cfg80211_rx_mgmt(priv->wdev, priv->roc_cfg.chan.center_freq,
CAL_RSSI(rx_pd->snr, rx_pd->nf), skb->data, pkt_len,
0);
return 0;
}
/*
* This function processes the received packet before sending it to the
* kernel.
*
* It extracts the SKB from the received buffer and sends it to kernel.
* In case the received buffer does not contain the data in SKB format,
* the function creates a blank SKB, fills it with the data from the
* received buffer and then sends this new SKB to the kernel.
*/
int mwifiex_recv_packet(struct mwifiex_private *priv, struct sk_buff *skb)
{
if (!skb)
return -1;
priv->stats.rx_bytes += skb->len;
priv->stats.rx_packets++;
skb->dev = priv->netdev;
skb->protocol = eth_type_trans(skb, priv->netdev);
skb->ip_summed = CHECKSUM_NONE;
/* This is required only in case of 11n and USB/PCIE as we alloc
* a buffer of 4K only if its 11N (to be able to receive 4K
* AMSDU packets). In case of SD we allocate buffers based
* on the size of packet and hence this is not needed.
*
* Modifying the truesize here as our allocation for each
* skb is 4K but we only receive 2K packets and this cause
* the kernel to start dropping packets in case where
* application has allocated buffer based on 2K size i.e.
* if there a 64K packet received (in IP fragments and
* application allocates 64K to receive this packet but
* this packet would almost double up because we allocate
* each 1.5K fragment in 4K and pass it up. As soon as the
* 64K limit hits kernel will start to drop rest of the
* fragments. Currently we fail the Filesndl-ht.scr script
* for UDP, hence this fix
*/
if ((priv->adapter->iface_type == MWIFIEX_USB ||
priv->adapter->iface_type == MWIFIEX_PCIE) &&
(skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE))
skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE);
if (in_interrupt())
netif_rx(skb);
else
netif_rx_ni(skb);
return 0;
}
/*
* IOCTL completion callback handler.
*
* This function is called when a pending IOCTL is completed.
*
* If work queue support is enabled, the function wakes up the
* corresponding waiting function. Otherwise, it processes the
* IOCTL response and frees the response buffer.
*/
int mwifiex_complete_cmd(struct mwifiex_adapter *adapter,
struct cmd_ctrl_node *cmd_node)
{
dev_dbg(adapter->dev, "cmd completed: status=%d\n",
adapter->cmd_wait_q.status);
*(cmd_node->condition) = true;
if (adapter->cmd_wait_q.status == -ETIMEDOUT)
dev_err(adapter->dev, "cmd timeout\n");
else
wake_up_interruptible(&adapter->cmd_wait_q.wait);
return 0;
}
/* This function will return the pointer to station entry in station list
* table which matches specified mac address.
* This function should be called after acquiring RA list spinlock.
* NULL is returned if station entry is not found in associated STA list.
*/
struct mwifiex_sta_node *
mwifiex_get_sta_entry(struct mwifiex_private *priv, const u8 *mac)
{
struct mwifiex_sta_node *node;
if (!mac)
return NULL;
list_for_each_entry(node, &priv->sta_list, list) {
if (!memcmp(node->mac_addr, mac, ETH_ALEN))
return node;
}
return NULL;
}
/* This function will add a sta_node entry to associated station list
* table with the given mac address.
* If entry exist already, existing entry is returned.
* If received mac address is NULL, NULL is returned.
*/
struct mwifiex_sta_node *
mwifiex_add_sta_entry(struct mwifiex_private *priv, const u8 *mac)
{
struct mwifiex_sta_node *node;
unsigned long flags;
if (!mac)
return NULL;
spin_lock_irqsave(&priv->sta_list_spinlock, flags);
node = mwifiex_get_sta_entry(priv, mac);
if (node)
goto done;
node = kzalloc(sizeof(*node), GFP_ATOMIC);
if (!node)
goto done;
memcpy(node->mac_addr, mac, ETH_ALEN);
list_add_tail(&node->list, &priv->sta_list);
done:
spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
return node;
}
/* This function will search for HT IE in association request IEs
* and set station HT parameters accordingly.
*/
void
mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies,
int ies_len, struct mwifiex_sta_node *node)
{
const struct ieee80211_ht_cap *ht_cap;
if (!ies)
return;
ht_cap = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies, ies_len);
if (ht_cap) {
node->is_11n_enabled = 1;
node->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
IEEE80211_HT_CAP_MAX_AMSDU ?
MWIFIEX_TX_DATA_BUF_SIZE_8K :
MWIFIEX_TX_DATA_BUF_SIZE_4K;
} else {
node->is_11n_enabled = 0;
}
return;
}
/* This function will delete a station entry from station list */
void mwifiex_del_sta_entry(struct mwifiex_private *priv, const u8 *mac)
{
struct mwifiex_sta_node *node;
unsigned long flags;
spin_lock_irqsave(&priv->sta_list_spinlock, flags);
node = mwifiex_get_sta_entry(priv, mac);
if (node) {
list_del(&node->list);
kfree(node);
}
spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
return;
}
/* This function will delete all stations from associated station list. */
void mwifiex_del_all_sta_list(struct mwifiex_private *priv)
{
struct mwifiex_sta_node *node, *tmp;
unsigned long flags;
spin_lock_irqsave(&priv->sta_list_spinlock, flags);
list_for_each_entry_safe(node, tmp, &priv->sta_list, list) {
list_del(&node->list);
kfree(node);
}
INIT_LIST_HEAD(&priv->sta_list);
spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
return;
}
