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 | (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
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)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
rtl_cam_delete_one_entry(struct ieee80211_hw * hw,u8 * mac_addr,u32 ul_key_id)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
rtl_cam_reset_all_entry(struct ieee80211_hw * hw)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
rtl_cam_mark_invalid(struct ieee80211_hw * hw,u8 uc_index)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
rtl_cam_empty_entry(struct ieee80211_hw * hw,u8 uc_index)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
rtl_cam_get_free_entry(struct ieee80211_hw * hw,u8 * sta_addr)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
rtl_cam_del_entry(struct ieee80211_hw * hw,u8 * sta_addr)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
