/****************************************************************************** * * Copyright(c) 2009-2010 Realtek Corporation. * * This program is free software; you can redistribute it and/or modify it * under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA * * The full GNU General Public License is included in this distribution in the * file called LICENSE. * * Contact Information: * wlanfae <wlanfae@realtek.com> * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park, * Hsinchu 300, Taiwan. * * Larry Finger <Larry.Finger@lwfinger.net> * *****************************************************************************/ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/export.h> #include "wifi.h" #include "cam.h" void rtl_cam_reset_sec_info(struct ieee80211_hw *hw) { struct rtl_priv *rtlpriv = rtl_priv(hw); rtlpriv->sec.use_defaultkey = false; rtlpriv->sec.pairwise_enc_algorithm = NO_ENCRYPTION; rtlpriv->sec.group_enc_algorithm = NO_ENCRYPTION; memset(rtlpriv->sec.key_buf, 0, KEY_BUF_SIZE * MAX_KEY_LEN); memset(rtlpriv->sec.key_len, 0, KEY_BUF_SIZE); rtlpriv->sec.pairwise_key = NULL; } static void rtl_cam_program_entry(struct ieee80211_hw *hw, u32 entry_no, u8 *mac_addr, u8 *key_cont_128, u16 us_config) { struct rtl_priv *rtlpriv = rtl_priv(hw); u32 target_command; u32 target_content = 0; u8 entry_i; RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, ("key_cont_128:\n %x:%x:%x:%x:%x:%x\n", key_cont_128[0], key_cont_128[1], key_cont_128[2], key_cont_128[3], key_cont_128[4], key_cont_128[5])); for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) { target_command = entry_i + CAM_CONTENT_COUNT * entry_no; target_command = target_command | BIT(31) | BIT(16); if (entry_i == 0) { target_content = (u32) (*(mac_addr + 0)) << 16 | (u32) (*(mac_addr + 1)) << 24 | (u32) us_config; rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], target_content); rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], target_command); RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, ("WRITE %x: %x\n", rtlpriv->cfg->maps[WCAMI], target_content)); RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, ("The Key ID is %d\n", entry_no)); RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, ("WRITE %x: %x\n", rtlpriv->cfg->maps[RWCAM], target_command)); } else if (entry_i == 1) { target_content = (u32) (*(mac_addr + 5)) << 24 | (u32) (*(mac_addr + 4)) << 16 | (u32) (*(mac_addr + 3)) << 8 | (u32) (*(mac_addr + 2)); rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], target_content); rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], target_command); RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, ("WRITE A4: %x\n", target_content)); RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, ("WRITE A0: %x\n", target_command)); } else { target_content = (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 3)) << 24 | (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 2)) << 16 | (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 1)) << 8 | (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 0)); rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], target_content); rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], target_command); udelay(100); RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, ("WRITE A4: %x\n", target_content)); RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, ("WRITE A0: %x\n", target_command)); } } RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, ("after set key, usconfig:%x\n", us_config)); } u8 rtl_cam_add_one_entry(struct ieee80211_hw *hw, u8 *mac_addr, u32 ul_key_id, u32 ul_entry_idx, u32 ul_enc_alg, u32 ul_default_key, u8 *key_content) { u32 us_config; struct rtl_priv *rtlpriv = rtl_priv(hw); RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, ("EntryNo:%x, ulKeyId=%x, ulEncAlg=%x, " "ulUseDK=%x MacAddr %pM\n", ul_entry_idx, ul_key_id, ul_enc_alg, ul_default_key, mac_addr)); if (ul_key_id == TOTAL_CAM_ENTRY) { RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING, ("<=== ulKeyId exceed!\n")); return 0; } if (ul_default_key == 1) { us_config = CFG_VALID | ((u16) (ul_enc_alg) << 2); } else { us_config = CFG_VALID | ((ul_enc_alg) << 2) | ul_key_id; } rtl_cam_program_entry(hw, ul_entry_idx, mac_addr, (u8 *) key_content, us_config); RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, ("<===\n")); return 1; } EXPORT_SYMBOL(rtl_cam_add_one_entry); int rtl_cam_delete_one_entry(struct ieee80211_hw *hw, u8 *mac_addr, u32 ul_key_id) { u32 ul_command; struct rtl_priv *rtlpriv = rtl_priv(hw); RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, ("key_idx:%d\n", ul_key_id)); ul_command = ul_key_id * CAM_CONTENT_COUNT; ul_command = ul_command | BIT(31) | BIT(16); rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], 0); rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command); RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, ("rtl_cam_delete_one_entry(): WRITE A4: %x\n", 0)); RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, ("rtl_cam_delete_one_entry(): WRITE A0: %x\n", ul_command)); return 0; } EXPORT_SYMBOL(rtl_cam_delete_one_entry); void rtl_cam_reset_all_entry(struct ieee80211_hw *hw) { u32 ul_command; struct rtl_priv *rtlpriv = rtl_priv(hw); ul_command = BIT(31) | BIT(30); rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command); } EXPORT_SYMBOL(rtl_cam_reset_all_entry); void rtl_cam_mark_invalid(struct ieee80211_hw *hw, u8 uc_index) { struct rtl_priv *rtlpriv = rtl_priv(hw); u32 ul_command; u32 ul_content; u32 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES]; switch (rtlpriv->sec.pairwise_enc_algorithm) { case WEP40_ENCRYPTION: ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP40]; break; case WEP104_ENCRYPTION: ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP104]; break; case TKIP_ENCRYPTION: ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_TKIP]; break; case AESCCMP_ENCRYPTION: ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES]; break; default: ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES]; } ul_content = (uc_index & 3) | ((u16) (ul_enc_algo) << 2); ul_content |= BIT(15); ul_command = CAM_CONTENT_COUNT * uc_index; ul_command = ul_command | BIT(31) | BIT(16); rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content); rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command); RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, ("rtl_cam_mark_invalid(): WRITE A4: %x\n", ul_content)); RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, ("rtl_cam_mark_invalid(): WRITE A0: %x\n", ul_command)); } EXPORT_SYMBOL(rtl_cam_mark_invalid); void rtl_cam_empty_entry(struct ieee80211_hw *hw, u8 uc_index) { struct rtl_priv *rtlpriv = rtl_priv(hw); u32 ul_command; u32 ul_content; u32 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES]; u8 entry_i; switch (rtlpriv->sec.pairwise_enc_algorithm) { case WEP40_ENCRYPTION: ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP40]; break; case WEP104_ENCRYPTION: ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP104]; break; case TKIP_ENCRYPTION: ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_TKIP]; break; case AESCCMP_ENCRYPTION: ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES]; break; default: ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES]; } for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) { if (entry_i == 0) { ul_content = (uc_index & 0x03) | ((u16) (ul_encalgo) << 2); ul_content |= BIT(15); } else { ul_content = 0; } ul_command = CAM_CONTENT_COUNT * uc_index + entry_i; ul_command = ul_command | BIT(31) | BIT(16); rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content); rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command); RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, ("rtl_cam_empty_entry(): WRITE A4: %x\n", ul_content)); RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, ("rtl_cam_empty_entry(): WRITE A0: %x\n", ul_command)); } } EXPORT_SYMBOL(rtl_cam_empty_entry); u8 rtl_cam_get_free_entry(struct ieee80211_hw *hw, u8 *sta_addr) { struct rtl_priv *rtlpriv = rtl_priv(hw); u32 bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> 4; u8 entry_idx = 0; u8 i, *addr; if (NULL == sta_addr) { RT_TRACE(rtlpriv, COMP_SEC, DBG_EMERG, ("sta_addr is NULL.\n")); return TOTAL_CAM_ENTRY; } /* Does STA already exist? */ for (i = 4; i < TOTAL_CAM_ENTRY; i++) { addr = rtlpriv->sec.hwsec_cam_sta_addr[i]; if (memcmp(addr, sta_addr, ETH_ALEN) == 0) return i; } /* Get a free CAM entry. */ for (entry_idx = 4; entry_idx < TOTAL_CAM_ENTRY; entry_idx++) { if ((bitmap & BIT(0)) == 0) { RT_TRACE(rtlpriv, COMP_SEC, DBG_EMERG, ("-----hwsec_cam_bitmap: 0x%x entry_idx=%d\n", rtlpriv->sec.hwsec_cam_bitmap, entry_idx)); rtlpriv->sec.hwsec_cam_bitmap |= BIT(0) << entry_idx; memcpy(rtlpriv->sec.hwsec_cam_sta_addr[entry_idx], sta_addr, ETH_ALEN); return entry_idx; } bitmap = bitmap >> 1; } return TOTAL_CAM_ENTRY; } EXPORT_SYMBOL(rtl_cam_get_free_entry); void rtl_cam_del_entry(struct ieee80211_hw *hw, u8 *sta_addr) { struct rtl_priv *rtlpriv = rtl_priv(hw); u32 bitmap; u8 i, *addr; if (NULL == sta_addr) { RT_TRACE(rtlpriv, COMP_SEC, DBG_EMERG, ("sta_addr is NULL.\n")); } if ((sta_addr[0]|sta_addr[1]|sta_addr[2]|sta_addr[3]|\ sta_addr[4]|sta_addr[5]) == 0) { RT_TRACE(rtlpriv, COMP_SEC, DBG_EMERG, ("sta_addr is 00:00:00:00:00:00.\n")); return; } /* Does STA already exist? */ for (i = 4; i < TOTAL_CAM_ENTRY; i++) { addr = rtlpriv->sec.hwsec_cam_sta_addr[i]; bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> i; if (((bitmap & BIT(0)) == BIT(0)) && (memcmp(addr, sta_addr, ETH_ALEN) == 0)) { /* Remove from HW Security CAM */ memset(rtlpriv->sec.hwsec_cam_sta_addr[i], 0, ETH_ALEN); rtlpriv->sec.hwsec_cam_bitmap &= ~(BIT(0) << i); pr_info("&&&&&&&&&del entry %d\n", i); } } return; } EXPORT_SYMBOL(rtl_cam_del_entry);