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353 lines
9.4 KiB
353 lines
9.4 KiB
// 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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void lbs_process_event(struct lbs_private *priv, u32 event) |
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{ |
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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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}
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