1 files changed, 353 insertions, 0 deletions

diff --git a/drivers/net/wireless/marvell/libertas/cmdresp.c b/drivers/net/wireless/marvell/libertas/cmdresp.c
new file mode 100644
index 000000000000..e5442e8956f7
--- /dev/null
+++ b/drivers/net/wireless/marvell/libertas/cmdresp.c
@@ -0,0 +1,353 @@
+/*
+ * 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
+ * @locally_generated: indicates disconnect was requested locally
+ *		(usually by userspace)
+ *
+ * returns:	n/a
+ */
+void lbs_mac_event_disconnected(struct lbs_private *priv,
+				bool locally_generated)
+{
+	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, locally_generated);
+
+	/* 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, false);
+		break;
+
+	case MACREG_INT_CODE_DISASSOCIATED:
+		lbs_deb_cmd("EVENT: disassociated\n");
+		lbs_mac_event_disconnected(priv, false);
+		break;
+
+	case MACREG_INT_CODE_LINK_LOST_NO_SCAN:
+		lbs_deb_cmd("EVENT: link lost\n");
+		lbs_mac_event_disconnected(priv, true);
+		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;
+}