drivers/staging/rtl8192e/rtl8192e/rtl_cam.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright(c) 2008 - 2010 Realtek Corporation. All rights reserved.
  *
  * Based on the r8180 driver, which is:
  * Copyright 2004-2005 Andrea Merello <andrea.merello@gmail.com>, et al.
  *
  * Contact Information: wlanfae <wlanfae@realtek.com>
  */
 #include "rtl_core.h"
 #include "r8192E_phy.h"
 #include "r8192E_phyreg.h"
 #include "r8190P_rtl8256.h" /* RTL8225 Radio frontend */
 #include "r8192E_cmdpkt.h"

 void rtl92e_cam_reset(struct net_device *dev)
 {
 	u32 ulcommand = 0;

 	ulcommand |= BIT31|BIT30;
 	rtl92e_writel(dev, RWCAM, ulcommand);
 }

 void rtl92e_enable_hw_security_config(struct net_device *dev)
 {
 	u8 SECR_value = 0x0;
 	struct r8192_priv *priv = (struct r8192_priv *)rtllib_priv(dev);
 	struct rtllib_device *ieee = priv->rtllib;

 	SECR_value = SCR_TxEncEnable | SCR_RxDecEnable;
 	if (((ieee->pairwise_key_type == KEY_TYPE_WEP40) ||
 	     (ieee->pairwise_key_type == KEY_TYPE_WEP104)) &&
 	     (priv->rtllib->auth_mode != 2)) {
 		SECR_value |= SCR_RxUseDK;
 		SECR_value |= SCR_TxUseDK;
 	} else if ((ieee->iw_mode == IW_MODE_ADHOC) &&
 		   (ieee->pairwise_key_type & (KEY_TYPE_CCMP |
 		   KEY_TYPE_TKIP))) {
 		SECR_value |= SCR_RxUseDK;
 		SECR_value |= SCR_TxUseDK;
 	}


 	ieee->hwsec_active = 1;
 	if ((ieee->pHTInfo->IOTAction&HT_IOT_ACT_PURE_N_MODE) || !hwwep) {
 		ieee->hwsec_active = 0;
 		SECR_value &= ~SCR_RxDecEnable;
 	}

 	RT_TRACE(COMP_SEC, "%s:, hwsec:%d, pairwise_key:%d, SECR_value:%x\n",
 		 __func__, ieee->hwsec_active, ieee->pairwise_key_type,
 		 SECR_value);
 	rtl92e_writeb(dev, SECR, SECR_value);
 }

 void rtl92e_set_swcam(struct net_device *dev, u8 EntryNo, u8 KeyIndex,
 		      u16 KeyType, const u8 *MacAddr, u8 DefaultKey,
 		      u32 *KeyContent, u8 is_mesh)
 {
 	struct r8192_priv *priv = rtllib_priv(dev);
 	struct rtllib_device *ieee = priv->rtllib;

 	RT_TRACE(COMP_DBG,
 		 "===========>%s():EntryNo is %d,KeyIndex is %d,KeyType is %d,is_mesh is %d\n",
 		 __func__, EntryNo, KeyIndex, KeyType, is_mesh);

 	if (EntryNo >= TOTAL_CAM_ENTRY)
 		return;

 	if (!is_mesh) {
 		ieee->swcamtable[EntryNo].bused = true;
 		ieee->swcamtable[EntryNo].key_index = KeyIndex;
 		ieee->swcamtable[EntryNo].key_type = KeyType;
 		memcpy(ieee->swcamtable[EntryNo].macaddr, MacAddr, 6);
 		ieee->swcamtable[EntryNo].useDK = DefaultKey;
 		memcpy(ieee->swcamtable[EntryNo].key_buf, (u8 *)KeyContent, 16);
 	}
 }

 void rtl92e_set_key(struct net_device *dev, u8 EntryNo, u8 KeyIndex,
 		    u16 KeyType, const u8 *MacAddr, u8 DefaultKey,
 		    u32 *KeyContent)
 {
 	u32 TargetCommand = 0;
 	u32 TargetContent = 0;
 	u16 usConfig = 0;
 	u8 i;
 	struct r8192_priv *priv = (struct r8192_priv *)rtllib_priv(dev);
 	enum rt_rf_power_state rtState;

 	rtState = priv->rtllib->eRFPowerState;
 	if (priv->rtllib->PowerSaveControl.bInactivePs) {
 		if (rtState == eRfOff) {
 			if (priv->rtllib->RfOffReason > RF_CHANGE_BY_IPS) {
 				netdev_warn(dev, "%s(): RF is OFF.\n",
 					    __func__);
 				return;
 			}
 			mutex_lock(&priv->rtllib->ips_mutex);
 			rtl92e_ips_leave(dev);
 			mutex_unlock(&priv->rtllib->ips_mutex);
 		}
 	}
 	priv->rtllib->is_set_key = true;
 	if (EntryNo >= TOTAL_CAM_ENTRY) {
 		netdev_info(dev, "%s(): Invalid CAM entry\n", __func__);
 		return;
 	}

 	RT_TRACE(COMP_SEC,
 		 "====>to %s, dev:%p, EntryNo:%d, KeyIndex:%d,KeyType:%d, MacAddr %pM\n",
 		 __func__, dev, EntryNo, KeyIndex, KeyType, MacAddr);

 	if (DefaultKey)
 		usConfig |= BIT15 | (KeyType<<2);
 	else
 		usConfig |= BIT15 | (KeyType<<2) | KeyIndex;


 	for (i = 0; i < CAM_CONTENT_COUNT; i++) {
 		TargetCommand  = i + CAM_CONTENT_COUNT * EntryNo;
 		TargetCommand |= BIT31|BIT16;

 		if (i == 0) {
 			TargetContent = (u32)(*(MacAddr+0)) << 16 |
 				(u32)(*(MacAddr+1)) << 24 |
 				(u32)usConfig;

 			rtl92e_writel(dev, WCAMI, TargetContent);
 			rtl92e_writel(dev, RWCAM, TargetCommand);
 		} else if (i == 1) {
 			TargetContent = (u32)(*(MacAddr+2)) |
 				(u32)(*(MacAddr+3)) <<  8 |
 				(u32)(*(MacAddr+4)) << 16 |
 				(u32)(*(MacAddr+5)) << 24;
 			rtl92e_writel(dev, WCAMI, TargetContent);
 			rtl92e_writel(dev, RWCAM, TargetCommand);
 		} else {
 			if (KeyContent != NULL) {
 				rtl92e_writel(dev, WCAMI,
 					      (u32)(*(KeyContent+i-2)));
 				rtl92e_writel(dev, RWCAM, TargetCommand);
 				udelay(100);
 			}
 		}
 	}
 	RT_TRACE(COMP_SEC, "=========>after set key, usconfig:%x\n", usConfig);
 }

 void rtl92e_cam_restore(struct net_device *dev)
 {
 	u8 EntryId = 0;
 	struct r8192_priv *priv = rtllib_priv(dev);
 	u8 *MacAddr = priv->rtllib->current_network.bssid;

 	static u8	CAM_CONST_ADDR[4][6] = {
 		{0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
 		{0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
 		{0x00, 0x00, 0x00, 0x00, 0x00, 0x02},
 		{0x00, 0x00, 0x00, 0x00, 0x00, 0x03}
 	};
 	static u8	CAM_CONST_BROAD[] = {
 		0xff, 0xff, 0xff, 0xff, 0xff, 0xff
 	};

 	RT_TRACE(COMP_SEC, "%s:\n", __func__);


 	if ((priv->rtllib->pairwise_key_type == KEY_TYPE_WEP40) ||
 	    (priv->rtllib->pairwise_key_type == KEY_TYPE_WEP104)) {

 		for (EntryId = 0; EntryId < 4; EntryId++) {
 			MacAddr = CAM_CONST_ADDR[EntryId];
 			if (priv->rtllib->swcamtable[EntryId].bused) {
 				rtl92e_set_key(dev, EntryId, EntryId,
 					       priv->rtllib->pairwise_key_type,
 					       MacAddr, 0,
 					       (u32 *)(&priv->rtllib->swcamtable
 						       [EntryId].key_buf[0]));
 			}
 		}

 	} else if (priv->rtllib->pairwise_key_type == KEY_TYPE_TKIP) {
 		if (priv->rtllib->iw_mode == IW_MODE_ADHOC) {
 			rtl92e_set_key(dev, 4, 0,
 				       priv->rtllib->pairwise_key_type,
 				       (const u8 *)dev->dev_addr, 0,
 				       (u32 *)(&priv->rtllib->swcamtable[4].key_buf[0]));
 		} else {
 			rtl92e_set_key(dev, 4, 0,
 				       priv->rtllib->pairwise_key_type,
 				       MacAddr, 0,
 				       (u32 *)(&priv->rtllib->swcamtable[4].key_buf[0]));
 		}

 	} else if (priv->rtllib->pairwise_key_type == KEY_TYPE_CCMP) {
 		if (priv->rtllib->iw_mode == IW_MODE_ADHOC) {
 			rtl92e_set_key(dev, 4, 0,
 				       priv->rtllib->pairwise_key_type,
 				       (const u8 *)dev->dev_addr, 0,
 				       (u32 *)(&priv->rtllib->swcamtable[4].key_buf[0]));
 		} else {
 			rtl92e_set_key(dev, 4, 0,
 				       priv->rtllib->pairwise_key_type, MacAddr,
 				       0, (u32 *)(&priv->rtllib->swcamtable[4].key_buf[0]));
 			}
 	}

 	if (priv->rtllib->group_key_type == KEY_TYPE_TKIP) {
 		MacAddr = CAM_CONST_BROAD;
 		for (EntryId = 1; EntryId < 4; EntryId++) {
 			if (priv->rtllib->swcamtable[EntryId].bused) {
 				rtl92e_set_key(dev, EntryId, EntryId,
 					       priv->rtllib->group_key_type,
 					       MacAddr, 0,
 					       (u32 *)(&priv->rtllib->swcamtable[EntryId].key_buf[0]));
 			}
 		}
 		if (priv->rtllib->iw_mode == IW_MODE_ADHOC) {
 			if (priv->rtllib->swcamtable[0].bused) {
 				rtl92e_set_key(dev, 0, 0,
 					       priv->rtllib->group_key_type,
 					       CAM_CONST_ADDR[0], 0,
 					       (u32 *)(&priv->rtllib->swcamtable[0].key_buf[0]));
 			} else {
 				netdev_warn(dev,
 					    "%s(): ADHOC TKIP: missing key entry.\n",
 					    __func__);
 				return;
 			}
 		}
 	} else if (priv->rtllib->group_key_type == KEY_TYPE_CCMP) {
 		MacAddr = CAM_CONST_BROAD;
 		for (EntryId = 1; EntryId < 4; EntryId++) {
 			if (priv->rtllib->swcamtable[EntryId].bused) {
 				rtl92e_set_key(dev, EntryId, EntryId,
 					       priv->rtllib->group_key_type,
 					       MacAddr, 0,
 					       (u32 *)(&priv->rtllib->swcamtable[EntryId].key_buf[0]));
 			}
 		}

 		if (priv->rtllib->iw_mode == IW_MODE_ADHOC) {
 			if (priv->rtllib->swcamtable[0].bused) {
 				rtl92e_set_key(dev, 0, 0,
 					       priv->rtllib->group_key_type,
 					       CAM_CONST_ADDR[0], 0,
 					       (u32 *)(&priv->rtllib->swcamtable[0].key_buf[0]));
 			} else {
 				netdev_warn(dev,
 					    "%s(): ADHOC CCMP: missing key entry.\n",
 					    __func__);
 				return;
 			}
 		}
 	}
 }
	// SPDX-License-Identifier: GPL-2.0
	/*
	* Copyright(c) 2008 - 2010 Realtek Corporation. All rights reserved.
	*
	* Based on the r8180 driver, which is:
	* Copyright 2004-2005 Andrea Merello <andrea.merello@gmail.com>, et al.
	*
	* Contact Information: wlanfae <wlanfae@realtek.com>
	*/
	#include "rtl_core.h"
	#include "r8192E_phy.h"
	#include "r8192E_phyreg.h"
	#include "r8190P_rtl8256.h" /* RTL8225 Radio frontend */
	#include "r8192E_cmdpkt.h"

	void rtl92e_cam_reset(struct net_device *dev)
	{
	u32 ulcommand = 0;

	ulcommand \|= BIT31\|BIT30;
	rtl92e_writel(dev, RWCAM, ulcommand);
	}

	void rtl92e_enable_hw_security_config(struct net_device *dev)
	{
	u8 SECR_value = 0x0;
	struct r8192_priv priv = (struct r8192_priv )rtllib_priv(dev);
	struct rtllib_device *ieee = priv->rtllib;

	SECR_value = SCR_TxEncEnable \| SCR_RxDecEnable;
	if (((ieee->pairwise_key_type == KEY_TYPE_WEP40) \|\|
	(ieee->pairwise_key_type == KEY_TYPE_WEP104)) &&
	(priv->rtllib->auth_mode != 2)) {
	SECR_value \|= SCR_RxUseDK;
	SECR_value \|= SCR_TxUseDK;
	} else if ((ieee->iw_mode == IW_MODE_ADHOC) &&
	(ieee->pairwise_key_type & (KEY_TYPE_CCMP \|
	KEY_TYPE_TKIP))) {
	SECR_value \|= SCR_RxUseDK;
	SECR_value \|= SCR_TxUseDK;
	}


	ieee->hwsec_active = 1;
	if ((ieee->pHTInfo->IOTAction&HT_IOT_ACT_PURE_N_MODE) \|\| !hwwep) {
	ieee->hwsec_active = 0;
	SECR_value &= ~SCR_RxDecEnable;
	}

	RT_TRACE(COMP_SEC, "%s:, hwsec:%d, pairwise_key:%d, SECR_value:%x\n",
	__func__, ieee->hwsec_active, ieee->pairwise_key_type,
	SECR_value);
	rtl92e_writeb(dev, SECR, SECR_value);
	}

	void rtl92e_set_swcam(struct net_device *dev, u8 EntryNo, u8 KeyIndex,
	u16 KeyType, const u8 *MacAddr, u8 DefaultKey,
	u32 *KeyContent, u8 is_mesh)
	{
	struct r8192_priv *priv = rtllib_priv(dev);
	struct rtllib_device *ieee = priv->rtllib;

	RT_TRACE(COMP_DBG,
	"===========>%s():EntryNo is %d,KeyIndex is %d,KeyType is %d,is_mesh is %d\n",
	__func__, EntryNo, KeyIndex, KeyType, is_mesh);

	if (EntryNo >= TOTAL_CAM_ENTRY)
	return;

	if (!is_mesh) {
	ieee->swcamtable[EntryNo].bused = true;
	ieee->swcamtable[EntryNo].key_index = KeyIndex;
	ieee->swcamtable[EntryNo].key_type = KeyType;
	memcpy(ieee->swcamtable[EntryNo].macaddr, MacAddr, 6);
	ieee->swcamtable[EntryNo].useDK = DefaultKey;
	memcpy(ieee->swcamtable[EntryNo].key_buf, (u8 *)KeyContent, 16);
	}
	}

	void rtl92e_set_key(struct net_device *dev, u8 EntryNo, u8 KeyIndex,
	u16 KeyType, const u8 *MacAddr, u8 DefaultKey,
	u32 *KeyContent)
	{
	u32 TargetCommand = 0;
	u32 TargetContent = 0;
	u16 usConfig = 0;
	u8 i;
	struct r8192_priv priv = (struct r8192_priv )rtllib_priv(dev);
	enum rt_rf_power_state rtState;

	rtState = priv->rtllib->eRFPowerState;
	if (priv->rtllib->PowerSaveControl.bInactivePs) {
	if (rtState == eRfOff) {
	if (priv->rtllib->RfOffReason > RF_CHANGE_BY_IPS) {
	netdev_warn(dev, "%s(): RF is OFF.\n",
	__func__);
	return;
	}
	mutex_lock(&priv->rtllib->ips_mutex);
	rtl92e_ips_leave(dev);
	mutex_unlock(&priv->rtllib->ips_mutex);
	}
	}
	priv->rtllib->is_set_key = true;
	if (EntryNo >= TOTAL_CAM_ENTRY) {
	netdev_info(dev, "%s(): Invalid CAM entry\n", __func__);
	return;
	}

	RT_TRACE(COMP_SEC,
	"====>to %s, dev:%p, EntryNo:%d, KeyIndex:%d,KeyType:%d, MacAddr %pM\n",
	__func__, dev, EntryNo, KeyIndex, KeyType, MacAddr);

	if (DefaultKey)
	usConfig \|= BIT15 \| (KeyType<<2);
	else
	usConfig \|= BIT15 \| (KeyType<<2) \| KeyIndex;


	for (i = 0; i < CAM_CONTENT_COUNT; i++) {
	TargetCommand = i + CAM_CONTENT_COUNT * EntryNo;
	TargetCommand \|= BIT31\|BIT16;

	if (i == 0) {
	TargetContent = (u32)(*(MacAddr+0)) << 16 \|
	(u32)(*(MacAddr+1)) << 24 \|
	(u32)usConfig;

	rtl92e_writel(dev, WCAMI, TargetContent);
	rtl92e_writel(dev, RWCAM, TargetCommand);
	} else if (i == 1) {
	TargetContent = (u32)(*(MacAddr+2)) \|
	(u32)(*(MacAddr+3)) << 8 \|
	(u32)(*(MacAddr+4)) << 16 \|
	(u32)(*(MacAddr+5)) << 24;
	rtl92e_writel(dev, WCAMI, TargetContent);
	rtl92e_writel(dev, RWCAM, TargetCommand);
	} else {
	if (KeyContent != NULL) {
	rtl92e_writel(dev, WCAMI,
	(u32)(*(KeyContent+i-2)));
	rtl92e_writel(dev, RWCAM, TargetCommand);
	udelay(100);
	}
	}
	}
	RT_TRACE(COMP_SEC, "=========>after set key, usconfig:%x\n", usConfig);
	}

	void rtl92e_cam_restore(struct net_device *dev)
	{
	u8 EntryId = 0;
	struct r8192_priv *priv = rtllib_priv(dev);
	u8 *MacAddr = priv->rtllib->current_network.bssid;

	static u8 CAM_CONST_ADDR[4][6] = {
	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
	{0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
	{0x00, 0x00, 0x00, 0x00, 0x00, 0x02},
	{0x00, 0x00, 0x00, 0x00, 0x00, 0x03}
	};
	static u8 CAM_CONST_BROAD[] = {
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff
	};

	RT_TRACE(COMP_SEC, "%s:\n", __func__);


	if ((priv->rtllib->pairwise_key_type == KEY_TYPE_WEP40) \|\|
	(priv->rtllib->pairwise_key_type == KEY_TYPE_WEP104)) {

	for (EntryId = 0; EntryId < 4; EntryId++) {
	MacAddr = CAM_CONST_ADDR[EntryId];
	if (priv->rtllib->swcamtable[EntryId].bused) {
	rtl92e_set_key(dev, EntryId, EntryId,
	priv->rtllib->pairwise_key_type,
	MacAddr, 0,
	(u32 *)(&priv->rtllib->swcamtable
	[EntryId].key_buf[0]));
	}
	}

	} else if (priv->rtllib->pairwise_key_type == KEY_TYPE_TKIP) {
	if (priv->rtllib->iw_mode == IW_MODE_ADHOC) {
	rtl92e_set_key(dev, 4, 0,
	priv->rtllib->pairwise_key_type,
	(const u8 *)dev->dev_addr, 0,
	(u32 *)(&priv->rtllib->swcamtable[4].key_buf[0]));
	} else {
	rtl92e_set_key(dev, 4, 0,
	priv->rtllib->pairwise_key_type,
	MacAddr, 0,
	(u32 *)(&priv->rtllib->swcamtable[4].key_buf[0]));
	}

	} else if (priv->rtllib->pairwise_key_type == KEY_TYPE_CCMP) {
	if (priv->rtllib->iw_mode == IW_MODE_ADHOC) {
	rtl92e_set_key(dev, 4, 0,
	priv->rtllib->pairwise_key_type,
	(const u8 *)dev->dev_addr, 0,
	(u32 *)(&priv->rtllib->swcamtable[4].key_buf[0]));
	} else {
	rtl92e_set_key(dev, 4, 0,
	priv->rtllib->pairwise_key_type, MacAddr,
	0, (u32 *)(&priv->rtllib->swcamtable[4].key_buf[0]));
	}
	}

	if (priv->rtllib->group_key_type == KEY_TYPE_TKIP) {
	MacAddr = CAM_CONST_BROAD;
	for (EntryId = 1; EntryId < 4; EntryId++) {
	if (priv->rtllib->swcamtable[EntryId].bused) {
	rtl92e_set_key(dev, EntryId, EntryId,
	priv->rtllib->group_key_type,
	MacAddr, 0,
	(u32 *)(&priv->rtllib->swcamtable[EntryId].key_buf[0]));
	}
	}
	if (priv->rtllib->iw_mode == IW_MODE_ADHOC) {
	if (priv->rtllib->swcamtable[0].bused) {
	rtl92e_set_key(dev, 0, 0,
	priv->rtllib->group_key_type,
	CAM_CONST_ADDR[0], 0,
	(u32 *)(&priv->rtllib->swcamtable[0].key_buf[0]));
	} else {
	netdev_warn(dev,
	"%s(): ADHOC TKIP: missing key entry.\n",
	__func__);
	return;
	}
	}
	} else if (priv->rtllib->group_key_type == KEY_TYPE_CCMP) {
	MacAddr = CAM_CONST_BROAD;
	for (EntryId = 1; EntryId < 4; EntryId++) {
	if (priv->rtllib->swcamtable[EntryId].bused) {
	rtl92e_set_key(dev, EntryId, EntryId,
	priv->rtllib->group_key_type,
	MacAddr, 0,
	(u32 *)(&priv->rtllib->swcamtable[EntryId].key_buf[0]));
	}
	}

	if (priv->rtllib->iw_mode == IW_MODE_ADHOC) {
	if (priv->rtllib->swcamtable[0].bused) {
	rtl92e_set_key(dev, 0, 0,
	priv->rtllib->group_key_type,
	CAM_CONST_ADDR[0], 0,
	(u32 *)(&priv->rtllib->swcamtable[0].key_buf[0]));
	} else {
	netdev_warn(dev,
	"%s(): ADHOC CCMP: missing key entry.\n",
	__func__);
	return;
	}
	}
	}
	}