357 lines
9.4 KiB
C
357 lines
9.4 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* This file contains the handling of command
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* responses as well as events generated by firmware.
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*/
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#include <linux/hardirq.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/sched.h>
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#include <asm/unaligned.h>
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#include <net/cfg80211.h>
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#include "cfg.h"
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#include "cmd.h"
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/**
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* lbs_mac_event_disconnected - handles disconnect event. It
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* reports disconnect to upper layer, clean tx/rx packets,
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* reset link state etc.
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*
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* @priv: A pointer to struct lbs_private structure
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* @locally_generated: indicates disconnect was requested locally
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* (usually by userspace)
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*
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* returns: n/a
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*/
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void lbs_mac_event_disconnected(struct lbs_private *priv,
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bool locally_generated)
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{
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unsigned long flags;
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if (priv->connect_status != LBS_CONNECTED)
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return;
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/*
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* Cisco AP sends EAP failure and de-auth in less than 0.5 ms.
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* It causes problem in the Supplicant
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*/
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msleep_interruptible(1000);
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if (priv->wdev->iftype == NL80211_IFTYPE_STATION)
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lbs_send_disconnect_notification(priv, locally_generated);
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/* report disconnect to upper layer */
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netif_stop_queue(priv->dev);
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netif_carrier_off(priv->dev);
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/* Free Tx and Rx packets */
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spin_lock_irqsave(&priv->driver_lock, flags);
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kfree_skb(priv->currenttxskb);
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priv->currenttxskb = NULL;
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priv->tx_pending_len = 0;
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spin_unlock_irqrestore(&priv->driver_lock, flags);
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priv->connect_status = LBS_DISCONNECTED;
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if (priv->psstate != PS_STATE_FULL_POWER) {
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/* make firmware to exit PS mode */
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lbs_deb_cmd("disconnected, so exit PS mode\n");
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lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, false);
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}
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}
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int lbs_process_command_response(struct lbs_private *priv, u8 *data, u32 len)
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{
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uint16_t respcmd, curcmd;
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struct cmd_header *resp;
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int ret = 0;
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unsigned long flags;
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uint16_t result;
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mutex_lock(&priv->lock);
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spin_lock_irqsave(&priv->driver_lock, flags);
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if (!priv->cur_cmd) {
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lbs_deb_host("CMD_RESP: cur_cmd is NULL\n");
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ret = -1;
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spin_unlock_irqrestore(&priv->driver_lock, flags);
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goto done;
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}
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resp = (void *)data;
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curcmd = le16_to_cpu(priv->cur_cmd->cmdbuf->command);
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respcmd = le16_to_cpu(resp->command);
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result = le16_to_cpu(resp->result);
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lbs_deb_cmd("CMD_RESP: response 0x%04x, seq %d, size %d\n",
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respcmd, le16_to_cpu(resp->seqnum), len);
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lbs_deb_hex(LBS_DEB_CMD, "CMD_RESP", (void *) resp, len);
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if (resp->seqnum != priv->cur_cmd->cmdbuf->seqnum) {
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netdev_info(priv->dev,
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"Received CMD_RESP with invalid sequence %d (expected %d)\n",
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le16_to_cpu(resp->seqnum),
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le16_to_cpu(priv->cur_cmd->cmdbuf->seqnum));
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spin_unlock_irqrestore(&priv->driver_lock, flags);
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ret = -1;
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goto done;
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}
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if (respcmd != CMD_RET(curcmd) &&
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respcmd != CMD_RET_802_11_ASSOCIATE && curcmd != CMD_802_11_ASSOCIATE) {
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netdev_info(priv->dev, "Invalid CMD_RESP %x to command %x!\n",
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respcmd, curcmd);
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spin_unlock_irqrestore(&priv->driver_lock, flags);
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ret = -1;
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goto done;
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}
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if (resp->result == cpu_to_le16(0x0004)) {
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/* 0x0004 means -EAGAIN. Drop the response, let it time out
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and be resubmitted */
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netdev_info(priv->dev,
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"Firmware returns DEFER to command %x. Will let it time out...\n",
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le16_to_cpu(resp->command));
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spin_unlock_irqrestore(&priv->driver_lock, flags);
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ret = -1;
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goto done;
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}
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/* Now we got response from FW, cancel the command timer */
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del_timer(&priv->command_timer);
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priv->cmd_timed_out = 0;
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if (respcmd == CMD_RET(CMD_802_11_PS_MODE)) {
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/* struct cmd_ds_802_11_ps_mode also contains
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* the header
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*/
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struct cmd_ds_802_11_ps_mode *psmode = (void *)resp;
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u16 action = le16_to_cpu(psmode->action);
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lbs_deb_host(
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"CMD_RESP: PS_MODE cmd reply result 0x%x, action 0x%x\n",
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result, action);
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if (result) {
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lbs_deb_host("CMD_RESP: PS command failed with 0x%x\n",
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result);
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/*
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* We should not re-try enter-ps command in
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* ad-hoc mode. It takes place in
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* lbs_execute_next_command().
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*/
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if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR &&
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action == PS_MODE_ACTION_ENTER_PS)
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priv->psmode = LBS802_11POWERMODECAM;
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} else if (action == PS_MODE_ACTION_ENTER_PS) {
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priv->needtowakeup = 0;
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priv->psstate = PS_STATE_AWAKE;
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lbs_deb_host("CMD_RESP: ENTER_PS command response\n");
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if (priv->connect_status != LBS_CONNECTED) {
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/*
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* When Deauth Event received before Enter_PS command
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* response, We need to wake up the firmware.
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*/
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lbs_deb_host(
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"disconnected, invoking lbs_ps_wakeup\n");
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spin_unlock_irqrestore(&priv->driver_lock, flags);
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mutex_unlock(&priv->lock);
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lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS,
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false);
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mutex_lock(&priv->lock);
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spin_lock_irqsave(&priv->driver_lock, flags);
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}
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} else if (action == PS_MODE_ACTION_EXIT_PS) {
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priv->needtowakeup = 0;
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priv->psstate = PS_STATE_FULL_POWER;
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lbs_deb_host("CMD_RESP: EXIT_PS command response\n");
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} else {
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lbs_deb_host("CMD_RESP: PS action 0x%X\n", action);
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}
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__lbs_complete_command(priv, priv->cur_cmd, result);
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spin_unlock_irqrestore(&priv->driver_lock, flags);
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ret = 0;
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goto done;
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}
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/* If the command is not successful, cleanup and return failure */
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if ((result != 0 || !(respcmd & 0x8000))) {
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lbs_deb_host("CMD_RESP: error 0x%04x in command reply 0x%04x\n",
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result, respcmd);
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/*
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* Handling errors here
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*/
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switch (respcmd) {
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case CMD_RET(CMD_GET_HW_SPEC):
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case CMD_RET(CMD_802_11_RESET):
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lbs_deb_host("CMD_RESP: reset failed\n");
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break;
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}
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__lbs_complete_command(priv, priv->cur_cmd, result);
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spin_unlock_irqrestore(&priv->driver_lock, flags);
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ret = -1;
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goto done;
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}
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spin_unlock_irqrestore(&priv->driver_lock, flags);
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if (priv->cur_cmd && priv->cur_cmd->callback) {
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ret = priv->cur_cmd->callback(priv, priv->cur_cmd->callback_arg,
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resp);
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}
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spin_lock_irqsave(&priv->driver_lock, flags);
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if (priv->cur_cmd) {
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/* Clean up and Put current command back to cmdfreeq */
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__lbs_complete_command(priv, priv->cur_cmd, result);
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}
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spin_unlock_irqrestore(&priv->driver_lock, flags);
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done:
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mutex_unlock(&priv->lock);
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return ret;
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}
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int lbs_process_event(struct lbs_private *priv, u32 event)
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{
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int ret = 0;
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struct cmd_header cmd;
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switch (event) {
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case MACREG_INT_CODE_LINK_SENSED:
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lbs_deb_cmd("EVENT: link sensed\n");
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break;
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case MACREG_INT_CODE_DEAUTHENTICATED:
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lbs_deb_cmd("EVENT: deauthenticated\n");
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lbs_mac_event_disconnected(priv, false);
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break;
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case MACREG_INT_CODE_DISASSOCIATED:
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lbs_deb_cmd("EVENT: disassociated\n");
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lbs_mac_event_disconnected(priv, false);
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break;
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case MACREG_INT_CODE_LINK_LOST_NO_SCAN:
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lbs_deb_cmd("EVENT: link lost\n");
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lbs_mac_event_disconnected(priv, true);
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break;
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case MACREG_INT_CODE_PS_SLEEP:
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lbs_deb_cmd("EVENT: ps sleep\n");
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/* handle unexpected PS SLEEP event */
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if (priv->psstate == PS_STATE_FULL_POWER) {
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lbs_deb_cmd(
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"EVENT: in FULL POWER mode, ignoring PS_SLEEP\n");
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break;
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}
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if (!list_empty(&priv->cmdpendingq)) {
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lbs_deb_cmd("EVENT: commands in queue, do not sleep\n");
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break;
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}
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priv->psstate = PS_STATE_PRE_SLEEP;
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lbs_ps_confirm_sleep(priv);
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break;
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case MACREG_INT_CODE_HOST_AWAKE:
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lbs_deb_cmd("EVENT: host awake\n");
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if (priv->reset_deep_sleep_wakeup)
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priv->reset_deep_sleep_wakeup(priv);
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priv->is_deep_sleep = 0;
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lbs_cmd_async(priv, CMD_802_11_WAKEUP_CONFIRM, &cmd,
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sizeof(cmd));
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priv->is_host_sleep_activated = 0;
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wake_up_interruptible(&priv->host_sleep_q);
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break;
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case MACREG_INT_CODE_DEEP_SLEEP_AWAKE:
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if (priv->reset_deep_sleep_wakeup)
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priv->reset_deep_sleep_wakeup(priv);
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lbs_deb_cmd("EVENT: ds awake\n");
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priv->is_deep_sleep = 0;
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priv->wakeup_dev_required = 0;
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wake_up_interruptible(&priv->ds_awake_q);
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break;
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case MACREG_INT_CODE_PS_AWAKE:
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lbs_deb_cmd("EVENT: ps awake\n");
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/* handle unexpected PS AWAKE event */
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if (priv->psstate == PS_STATE_FULL_POWER) {
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lbs_deb_cmd(
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"EVENT: In FULL POWER mode - ignore PS AWAKE\n");
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break;
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}
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priv->psstate = PS_STATE_AWAKE;
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if (priv->needtowakeup) {
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/*
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* wait for the command processing to finish
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* before resuming sending
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* priv->needtowakeup will be set to FALSE
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* in lbs_ps_wakeup()
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*/
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lbs_deb_cmd("waking up ...\n");
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lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, false);
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}
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break;
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case MACREG_INT_CODE_MIC_ERR_UNICAST:
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lbs_deb_cmd("EVENT: UNICAST MIC ERROR\n");
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lbs_send_mic_failureevent(priv, event);
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break;
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case MACREG_INT_CODE_MIC_ERR_MULTICAST:
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lbs_deb_cmd("EVENT: MULTICAST MIC ERROR\n");
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lbs_send_mic_failureevent(priv, event);
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break;
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case MACREG_INT_CODE_MIB_CHANGED:
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lbs_deb_cmd("EVENT: MIB CHANGED\n");
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break;
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case MACREG_INT_CODE_INIT_DONE:
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lbs_deb_cmd("EVENT: INIT DONE\n");
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break;
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case MACREG_INT_CODE_ADHOC_BCN_LOST:
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lbs_deb_cmd("EVENT: ADHOC beacon lost\n");
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break;
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case MACREG_INT_CODE_RSSI_LOW:
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netdev_alert(priv->dev, "EVENT: rssi low\n");
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break;
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case MACREG_INT_CODE_SNR_LOW:
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netdev_alert(priv->dev, "EVENT: snr low\n");
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break;
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case MACREG_INT_CODE_MAX_FAIL:
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netdev_alert(priv->dev, "EVENT: max fail\n");
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break;
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case MACREG_INT_CODE_RSSI_HIGH:
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netdev_alert(priv->dev, "EVENT: rssi high\n");
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break;
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case MACREG_INT_CODE_SNR_HIGH:
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netdev_alert(priv->dev, "EVENT: snr high\n");
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break;
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case MACREG_INT_CODE_MESH_AUTO_STARTED:
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/* Ignore spurious autostart events */
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netdev_info(priv->dev, "EVENT: MESH_AUTO_STARTED (ignoring)\n");
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break;
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default:
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netdev_alert(priv->dev, "EVENT: unknown event id %d\n", event);
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break;
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}
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return ret;
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}
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