linux/drivers/net/wireless/mwifiex/util.c
Amitkumar Karwar efaaa8b841 mwifiex: use separate wait condition for each command node
Currently global wait condition (adapter->cmd_wait_q.condition)
is used while sending synchronous commands to FW. When two threads
enter in mwifiex_send_cmd_sync() routine at the same time, both the
threads wait for their command responses. Since wait condition is
same for both, they wake up simultaneously after getting response
of 1st command. After this when a thread is waiting for command
response of 3rd command, it wakes up after getting response of 2nd
command and so on. Therefore we don't wait for the response of last
command(0xaa) during unload. Hence while next time loading the driver
command time out is seen for INIT command.

This problem is resolved by having separate wait condition flag for
each command(except scan command). Since scan command is treated
differently (by maintaining scan pending q etc.), newly defined flag
(scan_wait_q_woken) is used as a scan wait condition.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Yogesh Ashok Powar <yogeshp@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-10-14 14:48:20 -04:00

204 lines
6.4 KiB
C

/*
* Marvell Wireless LAN device driver: utility functions
*
* Copyright (C) 2011, 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_sync(priv, cmd, HostCmd_ACT_GEN_SET, 0, NULL);
}
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->max_tx_buf_size = (u32) adapter->max_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->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->num_cmd_timeout = adapter->dbg.num_cmd_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;
}
/*
* 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_adapter *adapter, struct sk_buff *skb)
{
struct mwifiex_rxinfo *rx_info;
struct mwifiex_private *priv;
if (!skb)
return -1;
rx_info = MWIFIEX_SKB_RXCB(skb);
priv = mwifiex_bss_index_to_priv(adapter, rx_info->bss_index);
if (!priv)
return -1;
skb->dev = priv->netdev;
skb->protocol = eth_type_trans(skb, priv->netdev);
skb->ip_summed = CHECKSUM_NONE;
priv->stats.rx_bytes += skb->len;
priv->stats.rx_packets++;
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)
{
atomic_dec(&adapter->cmd_pending);
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;
}