1 /****************************************************************************** 2 * 3 * Copyright(c) 2009-2012 Realtek Corporation. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of version 2 of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * The full GNU General Public License is included in this distribution in the 15 * file called LICENSE. 16 * 17 * Contact Information: 18 * wlanfae <wlanfae@realtek.com> 19 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park, 20 * Hsinchu 300, Taiwan. 21 * 22 * Larry Finger <Larry.Finger@lwfinger.net> 23 * 24 *****************************************************************************/ 25 #include "wifi.h" 26 #include "cam.h" 27 #include <linux/export.h> 28 29 void rtl_cam_reset_sec_info(struct ieee80211_hw *hw) 30 { 31 struct rtl_priv *rtlpriv = rtl_priv(hw); 32 33 rtlpriv->sec.use_defaultkey = false; 34 rtlpriv->sec.pairwise_enc_algorithm = NO_ENCRYPTION; 35 rtlpriv->sec.group_enc_algorithm = NO_ENCRYPTION; 36 memset(rtlpriv->sec.key_buf, 0, KEY_BUF_SIZE * MAX_KEY_LEN); 37 memset(rtlpriv->sec.key_len, 0, KEY_BUF_SIZE); 38 rtlpriv->sec.pairwise_key = NULL; 39 } 40 41 static void rtl_cam_program_entry(struct ieee80211_hw *hw, u32 entry_no, 42 u8 *mac_addr, u8 *key_cont_128, u16 us_config) 43 { 44 struct rtl_priv *rtlpriv = rtl_priv(hw); 45 46 u32 target_command; 47 u32 target_content = 0; 48 int entry_i; 49 50 RT_PRINT_DATA(rtlpriv, COMP_SEC, DBG_DMESG, "Key content :", 51 key_cont_128, 16); 52 53 /* 0-1 config + mac, 2-5 fill 128key,6-7 are reserved */ 54 for (entry_i = CAM_CONTENT_COUNT - 1; entry_i >= 0; entry_i--) { 55 target_command = entry_i + CAM_CONTENT_COUNT * entry_no; 56 target_command = target_command | BIT(31) | BIT(16); 57 58 if (entry_i == 0) { 59 target_content = (u32) (*(mac_addr + 0)) << 16 | 60 (u32) (*(mac_addr + 1)) << 24 | (u32) us_config; 61 62 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], 63 target_content); 64 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], 65 target_command); 66 67 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, 68 "WRITE %x: %x\n", 69 rtlpriv->cfg->maps[WCAMI], target_content); 70 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, 71 "The Key ID is %d\n", entry_no); 72 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, 73 "WRITE %x: %x\n", 74 rtlpriv->cfg->maps[RWCAM], target_command); 75 76 } else if (entry_i == 1) { 77 78 target_content = (u32) (*(mac_addr + 5)) << 24 | 79 (u32) (*(mac_addr + 4)) << 16 | 80 (u32) (*(mac_addr + 3)) << 8 | 81 (u32) (*(mac_addr + 2)); 82 83 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], 84 target_content); 85 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], 86 target_command); 87 88 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, 89 "WRITE A4: %x\n", target_content); 90 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, 91 "WRITE A0: %x\n", target_command); 92 93 } else { 94 95 target_content = 96 (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 3)) << 97 24 | (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 2)) 98 << 16 | 99 (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 1)) << 8 100 | (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 0)); 101 102 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], 103 target_content); 104 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], 105 target_command); 106 107 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, 108 "WRITE A4: %x\n", target_content); 109 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, 110 "WRITE A0: %x\n", target_command); 111 } 112 } 113 114 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, 115 "after set key, usconfig:%x\n", us_config); 116 } 117 118 u8 rtl_cam_add_one_entry(struct ieee80211_hw *hw, u8 *mac_addr, 119 u32 ul_key_id, u32 ul_entry_idx, u32 ul_enc_alg, 120 u32 ul_default_key, u8 *key_content) 121 { 122 u32 us_config; 123 struct rtl_priv *rtlpriv = rtl_priv(hw); 124 125 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, 126 "EntryNo:%x, ulKeyId=%x, ulEncAlg=%x, ulUseDK=%x MacAddr %pM\n", 127 ul_entry_idx, ul_key_id, ul_enc_alg, 128 ul_default_key, mac_addr); 129 130 if (ul_key_id == TOTAL_CAM_ENTRY) { 131 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING, 132 "ulKeyId exceed!\n"); 133 return 0; 134 } 135 136 if (ul_default_key == 1) 137 us_config = CFG_VALID | ((u16) (ul_enc_alg) << 2); 138 else 139 us_config = CFG_VALID | ((ul_enc_alg) << 2) | ul_key_id; 140 141 rtl_cam_program_entry(hw, ul_entry_idx, mac_addr, 142 (u8 *)key_content, us_config); 143 144 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, "end\n"); 145 146 return 1; 147 148 } 149 EXPORT_SYMBOL(rtl_cam_add_one_entry); 150 151 int rtl_cam_delete_one_entry(struct ieee80211_hw *hw, 152 u8 *mac_addr, u32 ul_key_id) 153 { 154 u32 ul_command; 155 struct rtl_priv *rtlpriv = rtl_priv(hw); 156 157 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, "key_idx:%d\n", ul_key_id); 158 159 ul_command = ul_key_id * CAM_CONTENT_COUNT; 160 ul_command = ul_command | BIT(31) | BIT(16); 161 162 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], 0); 163 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command); 164 165 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, 166 "rtl_cam_delete_one_entry(): WRITE A4: %x\n", 0); 167 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, 168 "rtl_cam_delete_one_entry(): WRITE A0: %x\n", ul_command); 169 170 return 0; 171 172 } 173 EXPORT_SYMBOL(rtl_cam_delete_one_entry); 174 175 void rtl_cam_reset_all_entry(struct ieee80211_hw *hw) 176 { 177 u32 ul_command; 178 struct rtl_priv *rtlpriv = rtl_priv(hw); 179 180 ul_command = BIT(31) | BIT(30); 181 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command); 182 } 183 EXPORT_SYMBOL(rtl_cam_reset_all_entry); 184 185 void rtl_cam_mark_invalid(struct ieee80211_hw *hw, u8 uc_index) 186 { 187 struct rtl_priv *rtlpriv = rtl_priv(hw); 188 189 u32 ul_command; 190 u32 ul_content; 191 u32 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES]; 192 193 switch (rtlpriv->sec.pairwise_enc_algorithm) { 194 case WEP40_ENCRYPTION: 195 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP40]; 196 break; 197 case WEP104_ENCRYPTION: 198 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP104]; 199 break; 200 case TKIP_ENCRYPTION: 201 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_TKIP]; 202 break; 203 case AESCCMP_ENCRYPTION: 204 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES]; 205 break; 206 default: 207 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES]; 208 } 209 210 ul_content = (uc_index & 3) | ((u16) (ul_enc_algo) << 2); 211 212 ul_content |= BIT(15); 213 ul_command = CAM_CONTENT_COUNT * uc_index; 214 ul_command = ul_command | BIT(31) | BIT(16); 215 216 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content); 217 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command); 218 219 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, 220 "rtl_cam_mark_invalid(): WRITE A4: %x\n", ul_content); 221 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, 222 "rtl_cam_mark_invalid(): WRITE A0: %x\n", ul_command); 223 } 224 EXPORT_SYMBOL(rtl_cam_mark_invalid); 225 226 void rtl_cam_empty_entry(struct ieee80211_hw *hw, u8 uc_index) 227 { 228 struct rtl_priv *rtlpriv = rtl_priv(hw); 229 230 u32 ul_command; 231 u32 ul_content; 232 u32 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES]; 233 u8 entry_i; 234 235 switch (rtlpriv->sec.pairwise_enc_algorithm) { 236 case WEP40_ENCRYPTION: 237 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP40]; 238 break; 239 case WEP104_ENCRYPTION: 240 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP104]; 241 break; 242 case TKIP_ENCRYPTION: 243 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_TKIP]; 244 break; 245 case AESCCMP_ENCRYPTION: 246 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES]; 247 break; 248 default: 249 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES]; 250 } 251 252 for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) { 253 254 if (entry_i == 0) { 255 ul_content = 256 (uc_index & 0x03) | ((u16) (ul_encalgo) << 2); 257 ul_content |= BIT(15); 258 259 } else { 260 ul_content = 0; 261 } 262 263 ul_command = CAM_CONTENT_COUNT * uc_index + entry_i; 264 ul_command = ul_command | BIT(31) | BIT(16); 265 266 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content); 267 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command); 268 269 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, 270 "rtl_cam_empty_entry(): WRITE A4: %x\n", 271 ul_content); 272 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, 273 "rtl_cam_empty_entry(): WRITE A0: %x\n", 274 ul_command); 275 } 276 277 } 278 EXPORT_SYMBOL(rtl_cam_empty_entry); 279 280 u8 rtl_cam_get_free_entry(struct ieee80211_hw *hw, u8 *sta_addr) 281 { 282 struct rtl_priv *rtlpriv = rtl_priv(hw); 283 u32 bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> 4; 284 u8 entry_idx = 0; 285 u8 i, *addr; 286 287 if (NULL == sta_addr) { 288 pr_err("sta_addr is NULL.\n"); 289 return TOTAL_CAM_ENTRY; 290 } 291 /* Does STA already exist? */ 292 for (i = 4; i < TOTAL_CAM_ENTRY; i++) { 293 addr = rtlpriv->sec.hwsec_cam_sta_addr[i]; 294 if (ether_addr_equal_unaligned(addr, sta_addr)) 295 return i; 296 } 297 /* Get a free CAM entry. */ 298 for (entry_idx = 4; entry_idx < TOTAL_CAM_ENTRY; entry_idx++) { 299 if ((bitmap & BIT(0)) == 0) { 300 pr_err("-----hwsec_cam_bitmap: 0x%x entry_idx=%d\n", 301 rtlpriv->sec.hwsec_cam_bitmap, entry_idx); 302 rtlpriv->sec.hwsec_cam_bitmap |= BIT(0) << entry_idx; 303 memcpy(rtlpriv->sec.hwsec_cam_sta_addr[entry_idx], 304 sta_addr, ETH_ALEN); 305 return entry_idx; 306 } 307 bitmap = bitmap >> 1; 308 } 309 return TOTAL_CAM_ENTRY; 310 } 311 EXPORT_SYMBOL(rtl_cam_get_free_entry); 312 313 void rtl_cam_del_entry(struct ieee80211_hw *hw, u8 *sta_addr) 314 { 315 struct rtl_priv *rtlpriv = rtl_priv(hw); 316 u32 bitmap; 317 u8 i, *addr; 318 319 if (NULL == sta_addr) { 320 pr_err("sta_addr is NULL.\n"); 321 return; 322 } 323 324 if (is_zero_ether_addr(sta_addr)) { 325 pr_err("sta_addr is %pM\n", sta_addr); 326 return; 327 } 328 /* Does STA already exist? */ 329 for (i = 4; i < TOTAL_CAM_ENTRY; i++) { 330 addr = rtlpriv->sec.hwsec_cam_sta_addr[i]; 331 bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> i; 332 if (((bitmap & BIT(0)) == BIT(0)) && 333 (ether_addr_equal_unaligned(addr, sta_addr))) { 334 /* Remove from HW Security CAM */ 335 eth_zero_addr(rtlpriv->sec.hwsec_cam_sta_addr[i]); 336 rtlpriv->sec.hwsec_cam_bitmap &= ~(BIT(0) << i); 337 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, 338 "&&&&&&&&&del entry %d\n", i); 339 } 340 } 341 return; 342 } 343 EXPORT_SYMBOL(rtl_cam_del_entry); 344