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