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
rtl_cam_reset_sec_info(struct ieee80211_hw * hw)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
rtl_cam_program_entry(struct ieee80211_hw * hw,u32 entry_no,u8 * mac_addr,u8 * key_cont_128,u16 us_config)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 |
61 (u32)us_config;
62
63 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
64 target_content);
65 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
66 target_command);
67
68 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
69 "WRITE %x: %x\n",
70 rtlpriv->cfg->maps[WCAMI], target_content);
71 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
72 "The Key ID is %d\n", entry_no);
73 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
74 "WRITE %x: %x\n",
75 rtlpriv->cfg->maps[RWCAM], target_command);
76
77 } 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));
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 } else {
93 target_content =
94 (u32)(*(key_cont_128 + (entry_i * 4 - 8) + 3)) <<
95 24 | (u32)(*(key_cont_128 + (entry_i * 4 - 8) + 2))
96 << 16 |
97 (u32)(*(key_cont_128 + (entry_i * 4 - 8) + 1)) << 8
98 | (u32)(*(key_cont_128 + (entry_i * 4 - 8) + 0));
99
100 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
101 target_content);
102 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
103 target_command);
104
105 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
106 "WRITE A4: %x\n", target_content);
107 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
108 "WRITE A0: %x\n", target_command);
109 }
110 }
111
112 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
113 "after set key, usconfig:%x\n", us_config);
114 }
115
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)116 u8 rtl_cam_add_one_entry(struct ieee80211_hw *hw, u8 *mac_addr,
117 u32 ul_key_id, u32 ul_entry_idx, u32 ul_enc_alg,
118 u32 ul_default_key, u8 *key_content)
119 {
120 u32 us_config;
121 struct rtl_priv *rtlpriv = rtl_priv(hw);
122
123 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG,
124 "EntryNo:%x, ulKeyId=%x, ulEncAlg=%x, ulUseDK=%x MacAddr %pM\n",
125 ul_entry_idx, ul_key_id, ul_enc_alg,
126 ul_default_key, mac_addr);
127
128 if (ul_key_id == TOTAL_CAM_ENTRY) {
129 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
130 "ulKeyId exceed!\n");
131 return 0;
132 }
133
134 if (ul_default_key == 1)
135 us_config = CFG_VALID | ((u16)(ul_enc_alg) << 2);
136 else
137 us_config = CFG_VALID | ((ul_enc_alg) << 2) | ul_key_id;
138
139 rtl_cam_program_entry(hw, ul_entry_idx, mac_addr,
140 (u8 *)key_content, us_config);
141
142 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, "end\n");
143
144 return 1;
145 }
146
rtl_cam_delete_one_entry(struct ieee80211_hw * hw,u8 * mac_addr,u32 ul_key_id)147 int rtl_cam_delete_one_entry(struct ieee80211_hw *hw,
148 u8 *mac_addr, u32 ul_key_id)
149 {
150 u32 ul_command;
151 struct rtl_priv *rtlpriv = rtl_priv(hw);
152
153 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, "key_idx:%d\n", ul_key_id);
154
155 ul_command = ul_key_id * CAM_CONTENT_COUNT;
156 ul_command = ul_command | BIT(31) | BIT(16);
157
158 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], 0);
159 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
160
161 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG,
162 "%s(): WRITE A4: %x\n", __func__, 0);
163 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG,
164 "%s(): WRITE A0: %x\n", __func__, ul_command);
165
166 return 0;
167 }
168
rtl_cam_reset_all_entry(struct ieee80211_hw * hw)169 void rtl_cam_reset_all_entry(struct ieee80211_hw *hw)
170 {
171 u32 ul_command;
172 struct rtl_priv *rtlpriv = rtl_priv(hw);
173
174 ul_command = BIT(31) | BIT(30);
175 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
176 }
177
rtl_cam_mark_invalid(struct ieee80211_hw * hw,u8 uc_index)178 void rtl_cam_mark_invalid(struct ieee80211_hw *hw, u8 uc_index)
179 {
180 struct rtl_priv *rtlpriv = rtl_priv(hw);
181
182 u32 ul_command;
183 u32 ul_content;
184 u32 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];
185
186 switch (rtlpriv->sec.pairwise_enc_algorithm) {
187 case WEP40_ENCRYPTION:
188 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP40];
189 break;
190 case WEP104_ENCRYPTION:
191 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP104];
192 break;
193 case TKIP_ENCRYPTION:
194 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_TKIP];
195 break;
196 case AESCCMP_ENCRYPTION:
197 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];
198 break;
199 default:
200 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];
201 }
202
203 ul_content = (uc_index & 3) | ((u16)(ul_enc_algo) << 2);
204
205 ul_content |= BIT(15);
206 ul_command = CAM_CONTENT_COUNT * uc_index;
207 ul_command = ul_command | BIT(31) | BIT(16);
208
209 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content);
210 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
211
212 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG,
213 "%s(): WRITE A4: %x\n", __func__, ul_content);
214 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG,
215 "%s(): WRITE A0: %x\n", __func__, ul_command);
216 }
217
rtl_cam_empty_entry(struct ieee80211_hw * hw,u8 uc_index)218 void rtl_cam_empty_entry(struct ieee80211_hw *hw, u8 uc_index)
219 {
220 struct rtl_priv *rtlpriv = rtl_priv(hw);
221
222 u32 ul_command;
223 u32 ul_content;
224 u32 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
225 u8 entry_i;
226
227 switch (rtlpriv->sec.pairwise_enc_algorithm) {
228 case WEP40_ENCRYPTION:
229 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP40];
230 break;
231 case WEP104_ENCRYPTION:
232 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP104];
233 break;
234 case TKIP_ENCRYPTION:
235 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_TKIP];
236 break;
237 case AESCCMP_ENCRYPTION:
238 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
239 break;
240 default:
241 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
242 }
243
244 for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) {
245 if (entry_i == 0) {
246 ul_content =
247 (uc_index & 0x03) | ((u16)(ul_encalgo) << 2);
248 ul_content |= BIT(15);
249 } else {
250 ul_content = 0;
251 }
252
253 ul_command = CAM_CONTENT_COUNT * uc_index + entry_i;
254 ul_command = ul_command | BIT(31) | BIT(16);
255
256 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content);
257 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
258
259 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
260 "%s(): WRITE A4: %x\n", __func__, ul_content);
261 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
262 "%s(): WRITE A0: %x\n", __func__, ul_command);
263 }
264 }
265
rtl_cam_get_free_entry(struct ieee80211_hw * hw,u8 * sta_addr)266 u8 rtl_cam_get_free_entry(struct ieee80211_hw *hw, u8 *sta_addr)
267 {
268 struct rtl_priv *rtlpriv = rtl_priv(hw);
269 u32 bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> 4;
270 u8 entry_idx = 0;
271 u8 i, *addr;
272
273 if (!sta_addr) {
274 pr_err("sta_addr is NULL.\n");
275 return TOTAL_CAM_ENTRY;
276 }
277 /* Does STA already exist? */
278 for (i = 4; i < TOTAL_CAM_ENTRY; i++) {
279 addr = rtlpriv->sec.hwsec_cam_sta_addr[i];
280 if (ether_addr_equal_unaligned(addr, sta_addr))
281 return i;
282 }
283 /* Get a free CAM entry. */
284 for (entry_idx = 4; entry_idx < TOTAL_CAM_ENTRY; entry_idx++) {
285 if ((bitmap & BIT(0)) == 0) {
286 pr_err("-----hwsec_cam_bitmap: 0x%x entry_idx=%d\n",
287 rtlpriv->sec.hwsec_cam_bitmap, entry_idx);
288 rtlpriv->sec.hwsec_cam_bitmap |= BIT(0) << entry_idx;
289 memcpy(rtlpriv->sec.hwsec_cam_sta_addr[entry_idx],
290 sta_addr, ETH_ALEN);
291 return entry_idx;
292 }
293 bitmap = bitmap >> 1;
294 }
295 return TOTAL_CAM_ENTRY;
296 }
297
rtl_cam_del_entry(struct ieee80211_hw * hw,u8 * sta_addr)298 void rtl_cam_del_entry(struct ieee80211_hw *hw, u8 *sta_addr)
299 {
300 struct rtl_priv *rtlpriv = rtl_priv(hw);
301 u32 bitmap;
302 u8 i, *addr;
303
304 if (!sta_addr) {
305 pr_err("sta_addr is NULL.\n");
306 return;
307 }
308
309 if (is_zero_ether_addr(sta_addr)) {
310 pr_err("sta_addr is %pM\n", sta_addr);
311 return;
312 }
313 /* Does STA already exist? */
314 for (i = 4; i < TOTAL_CAM_ENTRY; i++) {
315 addr = rtlpriv->sec.hwsec_cam_sta_addr[i];
316 bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> i;
317 if (((bitmap & BIT(0)) == BIT(0)) &&
318 (ether_addr_equal_unaligned(addr, sta_addr))) {
319 /* Remove from HW Security CAM */
320 eth_zero_addr(rtlpriv->sec.hwsec_cam_sta_addr[i]);
321 rtlpriv->sec.hwsec_cam_bitmap &= ~(BIT(0) << i);
322 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG,
323 "&&&&&&&&&del entry %d\n", i);
324 }
325 }
326 }
327