1 /******************************************************************************
3 * Copyright(c) 2009-2012 Realtek Corporation.
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.
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
14 * The full GNU General Public License is included in this distribution in the
15 * file called LICENSE.
17 * Contact Information:
18 * wlanfae <wlanfae@realtek.com>
19 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
20 * Hsinchu 300, Taiwan.
22 * Larry Finger <Larry.Finger@lwfinger.net>
24 *****************************************************************************/
27 #include <linux/export.h>
29 void rtl_cam_reset_sec_info(struct ieee80211_hw *hw)
31 struct rtl_priv *rtlpriv = rtl_priv(hw);
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;
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)
44 struct rtl_priv *rtlpriv = rtl_priv(hw);
47 u32 target_content = 0;
50 RT_PRINT_DATA(rtlpriv, COMP_SEC, DBG_DMESG, "Key content :",
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);
59 target_content = (u32) (*(mac_addr + 0)) << 16 |
60 (u32) (*(mac_addr + 1)) << 24 | (u32) us_config;
62 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
64 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
67 rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
69 rtlpriv->cfg->maps[WCAMI], target_content);
70 rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
71 "The Key ID is %d\n", entry_no);
72 rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
74 rtlpriv->cfg->maps[RWCAM], target_command);
76 } else if (entry_i == 1) {
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));
83 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
85 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
88 rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
89 "WRITE A4: %x\n", target_content);
90 rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
91 "WRITE A0: %x\n", target_command);
96 (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 3)) <<
97 24 | (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 2))
99 (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 1)) << 8
100 | (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 0));
102 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
104 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
107 rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
108 "WRITE A4: %x\n", target_content);
109 rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
110 "WRITE A0: %x\n", target_command);
114 rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
115 "after set key, usconfig:%x\n", us_config);
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)
123 struct rtl_priv *rtlpriv = rtl_priv(hw);
125 rtl_dbg(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);
130 if (ul_key_id == TOTAL_CAM_ENTRY) {
131 rtl_dbg(rtlpriv, COMP_ERR, DBG_WARNING,
132 "ulKeyId exceed!\n");
136 if (ul_default_key == 1)
137 us_config = CFG_VALID | ((u16) (ul_enc_alg) << 2);
139 us_config = CFG_VALID | ((ul_enc_alg) << 2) | ul_key_id;
141 rtl_cam_program_entry(hw, ul_entry_idx, mac_addr,
142 (u8 *)key_content, us_config);
144 rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG, "end\n");
149 EXPORT_SYMBOL(rtl_cam_add_one_entry);
151 int rtl_cam_delete_one_entry(struct ieee80211_hw *hw,
152 u8 *mac_addr, u32 ul_key_id)
155 struct rtl_priv *rtlpriv = rtl_priv(hw);
157 rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG, "key_idx:%d\n", ul_key_id);
159 ul_command = ul_key_id * CAM_CONTENT_COUNT;
160 ul_command = ul_command | BIT(31) | BIT(16);
162 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], 0);
163 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
165 rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG,
166 "%s: WRITE A4: %x\n", __func__, 0);
167 rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG,
168 "%s: WRITE A0: %x\n", __func__, ul_command);
173 EXPORT_SYMBOL(rtl_cam_delete_one_entry);
175 void rtl_cam_reset_all_entry(struct ieee80211_hw *hw)
178 struct rtl_priv *rtlpriv = rtl_priv(hw);
180 ul_command = BIT(31) | BIT(30);
181 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
183 EXPORT_SYMBOL(rtl_cam_reset_all_entry);
185 void rtl_cam_mark_invalid(struct ieee80211_hw *hw, u8 uc_index)
187 struct rtl_priv *rtlpriv = rtl_priv(hw);
191 u32 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];
193 switch (rtlpriv->sec.pairwise_enc_algorithm) {
194 case WEP40_ENCRYPTION:
195 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP40];
197 case WEP104_ENCRYPTION:
198 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP104];
200 case TKIP_ENCRYPTION:
201 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_TKIP];
203 case AESCCMP_ENCRYPTION:
204 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];
207 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];
210 ul_content = (uc_index & 3) | ((u16) (ul_enc_algo) << 2);
212 ul_content |= BIT(15);
213 ul_command = CAM_CONTENT_COUNT * uc_index;
214 ul_command = ul_command | BIT(31) | BIT(16);
216 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content);
217 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
219 rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG,
220 "%s: WRITE A4: %x\n", __func__, ul_content);
221 rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG,
222 "%s: WRITE A0: %x\n", __func__, ul_command);
224 EXPORT_SYMBOL(rtl_cam_mark_invalid);
226 void rtl_cam_empty_entry(struct ieee80211_hw *hw, u8 uc_index)
228 struct rtl_priv *rtlpriv = rtl_priv(hw);
232 u32 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
235 switch (rtlpriv->sec.pairwise_enc_algorithm) {
236 case WEP40_ENCRYPTION:
237 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP40];
239 case WEP104_ENCRYPTION:
240 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP104];
242 case TKIP_ENCRYPTION:
243 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_TKIP];
245 case AESCCMP_ENCRYPTION:
246 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
249 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
252 for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) {
256 (uc_index & 0x03) | ((u16) (ul_encalgo) << 2);
257 ul_content |= BIT(15);
263 ul_command = CAM_CONTENT_COUNT * uc_index + entry_i;
264 ul_command = ul_command | BIT(31) | BIT(16);
266 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content);
267 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
269 rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
270 "%s: WRITE A4: %x\n", __func__, ul_content);
271 rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
272 "%s: WRITE A0: %x\n", __func__, ul_command);
276 EXPORT_SYMBOL(rtl_cam_empty_entry);
278 u8 rtl_cam_get_free_entry(struct ieee80211_hw *hw, u8 *sta_addr)
280 struct rtl_priv *rtlpriv = rtl_priv(hw);
281 u32 bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> 4;
285 if (NULL == sta_addr) {
286 pr_err("sta_addr is NULL.\n");
287 return TOTAL_CAM_ENTRY;
289 /* Does STA already exist? */
290 for (i = 4; i < TOTAL_CAM_ENTRY; i++) {
291 addr = rtlpriv->sec.hwsec_cam_sta_addr[i];
292 if (ether_addr_equal_unaligned(addr, sta_addr))
295 /* Get a free CAM entry. */
296 for (entry_idx = 4; entry_idx < TOTAL_CAM_ENTRY; entry_idx++) {
297 if ((bitmap & BIT(0)) == 0) {
298 pr_err("-----hwsec_cam_bitmap: 0x%x entry_idx=%d\n",
299 rtlpriv->sec.hwsec_cam_bitmap, entry_idx);
300 rtlpriv->sec.hwsec_cam_bitmap |= BIT(0) << entry_idx;
301 memcpy(rtlpriv->sec.hwsec_cam_sta_addr[entry_idx],
305 bitmap = bitmap >> 1;
307 return TOTAL_CAM_ENTRY;
309 EXPORT_SYMBOL(rtl_cam_get_free_entry);
311 void rtl_cam_del_entry(struct ieee80211_hw *hw, u8 *sta_addr)
313 struct rtl_priv *rtlpriv = rtl_priv(hw);
317 if (NULL == sta_addr) {
318 pr_err("sta_addr is NULL.\n");
322 if (is_zero_ether_addr(sta_addr)) {
323 pr_err("sta_addr is %pM\n", sta_addr);
326 /* Does STA already exist? */
327 for (i = 4; i < TOTAL_CAM_ENTRY; i++) {
328 addr = rtlpriv->sec.hwsec_cam_sta_addr[i];
329 bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> i;
330 if (((bitmap & BIT(0)) == BIT(0)) &&
331 (ether_addr_equal_unaligned(addr, sta_addr))) {
332 /* Remove from HW Security CAM */
333 eth_zero_addr(rtlpriv->sec.hwsec_cam_sta_addr[i]);
334 rtlpriv->sec.hwsec_cam_bitmap &= ~(BIT(0) << i);
335 rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG,
336 "&&&&&&&&&del entry %d\n", i);
341 EXPORT_SYMBOL(rtl_cam_del_entry);