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0c817338 LF |
1 | /****************************************************************************** |
2 | * | |
a8d76066 | 3 | * Copyright(c) 2009-2012 Realtek Corporation. |
0c817338 LF |
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 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA | |
17 | * | |
18 | * The full GNU General Public License is included in this distribution in the | |
19 | * file called LICENSE. | |
20 | * | |
21 | * Contact Information: | |
22 | * wlanfae <wlanfae@realtek.com> | |
23 | * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park, | |
24 | * Hsinchu 300, Taiwan. | |
25 | * | |
46a6272c C |
26 | * Larry Finger <Larry.Finger@lwfinger.net> |
27 | * | |
0c817338 LF |
28 | *****************************************************************************/ |
29 | ||
ee40fa06 | 30 | #include <linux/export.h> |
0c817338 LF |
31 | #include "wifi.h" |
32 | #include "cam.h" | |
33 | ||
34 | void rtl_cam_reset_sec_info(struct ieee80211_hw *hw) | |
35 | { | |
36 | struct rtl_priv *rtlpriv = rtl_priv(hw); | |
37 | ||
38 | rtlpriv->sec.use_defaultkey = false; | |
39 | rtlpriv->sec.pairwise_enc_algorithm = NO_ENCRYPTION; | |
40 | rtlpriv->sec.group_enc_algorithm = NO_ENCRYPTION; | |
41 | memset(rtlpriv->sec.key_buf, 0, KEY_BUF_SIZE * MAX_KEY_LEN); | |
42 | memset(rtlpriv->sec.key_len, 0, KEY_BUF_SIZE); | |
43 | rtlpriv->sec.pairwise_key = NULL; | |
44 | } | |
45 | ||
46 | static void rtl_cam_program_entry(struct ieee80211_hw *hw, u32 entry_no, | |
47 | u8 *mac_addr, u8 *key_cont_128, u16 us_config) | |
48 | { | |
49 | struct rtl_priv *rtlpriv = rtl_priv(hw); | |
50 | ||
51 | u32 target_command; | |
52 | u32 target_content = 0; | |
53 | u8 entry_i; | |
54 | ||
ed9f0ed3 AS |
55 | RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, "key_cont_128: %6phC\n", |
56 | key_cont_128); | |
0c817338 LF |
57 | |
58 | for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) { | |
59 | target_command = entry_i + CAM_CONTENT_COUNT * entry_no; | |
60 | target_command = target_command | BIT(31) | BIT(16); | |
61 | ||
62 | if (entry_i == 0) { | |
63 | target_content = (u32) (*(mac_addr + 0)) << 16 | | |
64 | (u32) (*(mac_addr + 1)) << 24 | (u32) us_config; | |
65 | ||
66 | rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], | |
67 | target_content); | |
68 | rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], | |
69 | target_command); | |
70 | ||
f30d7507 JP |
71 | RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, "WRITE %x: %x\n", |
72 | rtlpriv->cfg->maps[WCAMI], target_content); | |
46a6272c | 73 | RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, |
f30d7507 JP |
74 | "The Key ID is %d\n", entry_no); |
75 | RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, "WRITE %x: %x\n", | |
76 | rtlpriv->cfg->maps[RWCAM], target_command); | |
0c817338 LF |
77 | |
78 | } else if (entry_i == 1) { | |
79 | ||
80 | target_content = (u32) (*(mac_addr + 5)) << 24 | | |
81 | (u32) (*(mac_addr + 4)) << 16 | | |
82 | (u32) (*(mac_addr + 3)) << 8 | | |
83 | (u32) (*(mac_addr + 2)); | |
84 | ||
85 | rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], | |
86 | target_content); | |
87 | rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], | |
88 | target_command); | |
89 | ||
f30d7507 JP |
90 | RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, "WRITE A4: %x\n", |
91 | target_content); | |
92 | RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, "WRITE A0: %x\n", | |
93 | target_command); | |
0c817338 LF |
94 | |
95 | } else { | |
96 | ||
97 | target_content = | |
98 | (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 3)) << | |
99 | 24 | (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 2)) | |
100 | << 16 | | |
101 | (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 1)) << 8 | |
102 | | (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 0)); | |
103 | ||
104 | rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], | |
105 | target_content); | |
106 | rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], | |
107 | target_command); | |
108 | udelay(100); | |
109 | ||
f30d7507 JP |
110 | RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, "WRITE A4: %x\n", |
111 | target_content); | |
112 | RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, "WRITE A0: %x\n", | |
113 | target_command); | |
0c817338 LF |
114 | } |
115 | } | |
116 | ||
f30d7507 JP |
117 | RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, "after set key, usconfig:%x\n", |
118 | us_config); | |
0c817338 LF |
119 | } |
120 | ||
121 | u8 rtl_cam_add_one_entry(struct ieee80211_hw *hw, u8 *mac_addr, | |
122 | u32 ul_key_id, u32 ul_entry_idx, u32 ul_enc_alg, | |
123 | u32 ul_default_key, u8 *key_content) | |
124 | { | |
125 | u32 us_config; | |
126 | struct rtl_priv *rtlpriv = rtl_priv(hw); | |
127 | ||
5ea27696 | 128 | RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, |
f30d7507 JP |
129 | "EntryNo:%x, ulKeyId=%x, ulEncAlg=%x, ulUseDK=%x MacAddr %pM\n", |
130 | ul_entry_idx, ul_key_id, ul_enc_alg, | |
131 | ul_default_key, mac_addr); | |
0c817338 LF |
132 | |
133 | if (ul_key_id == TOTAL_CAM_ENTRY) { | |
134 | RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING, | |
f30d7507 | 135 | "<=== ulKeyId exceed!\n"); |
0c817338 LF |
136 | return 0; |
137 | } | |
138 | ||
139 | if (ul_default_key == 1) { | |
140 | us_config = CFG_VALID | ((u16) (ul_enc_alg) << 2); | |
141 | } else { | |
142 | us_config = CFG_VALID | ((ul_enc_alg) << 2) | ul_key_id; | |
143 | } | |
144 | ||
145 | rtl_cam_program_entry(hw, ul_entry_idx, mac_addr, | |
2c208890 | 146 | key_content, us_config); |
0c817338 | 147 | |
f30d7507 | 148 | RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, "<===\n"); |
0c817338 LF |
149 | |
150 | return 1; | |
151 | ||
152 | } | |
153 | EXPORT_SYMBOL(rtl_cam_add_one_entry); | |
154 | ||
155 | int rtl_cam_delete_one_entry(struct ieee80211_hw *hw, | |
156 | u8 *mac_addr, u32 ul_key_id) | |
157 | { | |
158 | u32 ul_command; | |
159 | struct rtl_priv *rtlpriv = rtl_priv(hw); | |
160 | ||
f30d7507 | 161 | RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, "key_idx:%d\n", ul_key_id); |
0c817338 LF |
162 | |
163 | ul_command = ul_key_id * CAM_CONTENT_COUNT; | |
164 | ul_command = ul_command | BIT(31) | BIT(16); | |
165 | ||
166 | rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], 0); | |
167 | rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command); | |
168 | ||
169 | RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, | |
f30d7507 | 170 | "rtl_cam_delete_one_entry(): WRITE A4: %x\n", 0); |
0c817338 | 171 | RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, |
f30d7507 | 172 | "rtl_cam_delete_one_entry(): WRITE A0: %x\n", ul_command); |
0c817338 LF |
173 | |
174 | return 0; | |
175 | ||
176 | } | |
177 | EXPORT_SYMBOL(rtl_cam_delete_one_entry); | |
178 | ||
179 | void rtl_cam_reset_all_entry(struct ieee80211_hw *hw) | |
180 | { | |
181 | u32 ul_command; | |
182 | struct rtl_priv *rtlpriv = rtl_priv(hw); | |
183 | ||
184 | ul_command = BIT(31) | BIT(30); | |
185 | rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command); | |
186 | } | |
187 | EXPORT_SYMBOL(rtl_cam_reset_all_entry); | |
188 | ||
189 | void rtl_cam_mark_invalid(struct ieee80211_hw *hw, u8 uc_index) | |
190 | { | |
191 | struct rtl_priv *rtlpriv = rtl_priv(hw); | |
192 | ||
193 | u32 ul_command; | |
194 | u32 ul_content; | |
195 | u32 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES]; | |
196 | ||
197 | switch (rtlpriv->sec.pairwise_enc_algorithm) { | |
198 | case WEP40_ENCRYPTION: | |
199 | ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP40]; | |
200 | break; | |
201 | case WEP104_ENCRYPTION: | |
202 | ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP104]; | |
203 | break; | |
204 | case TKIP_ENCRYPTION: | |
205 | ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_TKIP]; | |
206 | break; | |
207 | case AESCCMP_ENCRYPTION: | |
208 | ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES]; | |
209 | break; | |
210 | default: | |
211 | ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES]; | |
212 | } | |
213 | ||
214 | ul_content = (uc_index & 3) | ((u16) (ul_enc_algo) << 2); | |
215 | ||
216 | ul_content |= BIT(15); | |
217 | ul_command = CAM_CONTENT_COUNT * uc_index; | |
218 | ul_command = ul_command | BIT(31) | BIT(16); | |
219 | ||
220 | rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content); | |
221 | rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command); | |
222 | ||
223 | RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, | |
f30d7507 | 224 | "rtl_cam_mark_invalid(): WRITE A4: %x\n", ul_content); |
0c817338 | 225 | RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, |
f30d7507 | 226 | "rtl_cam_mark_invalid(): WRITE A0: %x\n", ul_command); |
0c817338 LF |
227 | } |
228 | EXPORT_SYMBOL(rtl_cam_mark_invalid); | |
229 | ||
230 | void rtl_cam_empty_entry(struct ieee80211_hw *hw, u8 uc_index) | |
231 | { | |
232 | struct rtl_priv *rtlpriv = rtl_priv(hw); | |
233 | ||
234 | u32 ul_command; | |
235 | u32 ul_content; | |
236 | u32 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES]; | |
237 | u8 entry_i; | |
238 | ||
239 | switch (rtlpriv->sec.pairwise_enc_algorithm) { | |
240 | case WEP40_ENCRYPTION: | |
241 | ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP40]; | |
242 | break; | |
243 | case WEP104_ENCRYPTION: | |
244 | ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP104]; | |
245 | break; | |
246 | case TKIP_ENCRYPTION: | |
247 | ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_TKIP]; | |
248 | break; | |
249 | case AESCCMP_ENCRYPTION: | |
250 | ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES]; | |
251 | break; | |
252 | default: | |
253 | ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES]; | |
254 | } | |
255 | ||
256 | for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) { | |
257 | ||
258 | if (entry_i == 0) { | |
259 | ul_content = | |
260 | (uc_index & 0x03) | ((u16) (ul_encalgo) << 2); | |
261 | ul_content |= BIT(15); | |
262 | ||
263 | } else { | |
264 | ul_content = 0; | |
265 | } | |
266 | ||
267 | ul_command = CAM_CONTENT_COUNT * uc_index + entry_i; | |
268 | ul_command = ul_command | BIT(31) | BIT(16); | |
269 | ||
270 | rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content); | |
271 | rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command); | |
272 | ||
273 | RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, | |
f30d7507 JP |
274 | "rtl_cam_empty_entry(): WRITE A4: %x\n", |
275 | ul_content); | |
0c817338 | 276 | RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, |
f30d7507 JP |
277 | "rtl_cam_empty_entry(): WRITE A0: %x\n", |
278 | ul_command); | |
0c817338 LF |
279 | } |
280 | ||
281 | } | |
282 | EXPORT_SYMBOL(rtl_cam_empty_entry); | |
46a6272c C |
283 | |
284 | u8 rtl_cam_get_free_entry(struct ieee80211_hw *hw, u8 *sta_addr) | |
285 | { | |
286 | struct rtl_priv *rtlpriv = rtl_priv(hw); | |
287 | u32 bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> 4; | |
288 | u8 entry_idx = 0; | |
289 | u8 i, *addr; | |
290 | ||
291 | if (NULL == sta_addr) { | |
f30d7507 | 292 | RT_TRACE(rtlpriv, COMP_SEC, DBG_EMERG, "sta_addr is NULL\n"); |
46a6272c C |
293 | return TOTAL_CAM_ENTRY; |
294 | } | |
295 | /* Does STA already exist? */ | |
296 | for (i = 4; i < TOTAL_CAM_ENTRY; i++) { | |
297 | addr = rtlpriv->sec.hwsec_cam_sta_addr[i]; | |
298 | if (memcmp(addr, sta_addr, ETH_ALEN) == 0) | |
299 | return i; | |
300 | } | |
301 | /* Get a free CAM entry. */ | |
302 | for (entry_idx = 4; entry_idx < TOTAL_CAM_ENTRY; entry_idx++) { | |
303 | if ((bitmap & BIT(0)) == 0) { | |
304 | RT_TRACE(rtlpriv, COMP_SEC, DBG_EMERG, | |
f30d7507 JP |
305 | "-----hwsec_cam_bitmap: 0x%x entry_idx=%d\n", |
306 | rtlpriv->sec.hwsec_cam_bitmap, entry_idx); | |
46a6272c C |
307 | rtlpriv->sec.hwsec_cam_bitmap |= BIT(0) << entry_idx; |
308 | memcpy(rtlpriv->sec.hwsec_cam_sta_addr[entry_idx], | |
309 | sta_addr, ETH_ALEN); | |
310 | return entry_idx; | |
311 | } | |
312 | bitmap = bitmap >> 1; | |
313 | } | |
314 | return TOTAL_CAM_ENTRY; | |
315 | } | |
316 | EXPORT_SYMBOL(rtl_cam_get_free_entry); | |
317 | ||
318 | void rtl_cam_del_entry(struct ieee80211_hw *hw, u8 *sta_addr) | |
319 | { | |
320 | struct rtl_priv *rtlpriv = rtl_priv(hw); | |
321 | u32 bitmap; | |
322 | u8 i, *addr; | |
323 | ||
324 | if (NULL == sta_addr) { | |
f30d7507 | 325 | RT_TRACE(rtlpriv, COMP_SEC, DBG_EMERG, "sta_addr is NULL\n"); |
46a6272c C |
326 | } |
327 | ||
68e052d5 | 328 | if (is_zero_ether_addr(sta_addr)) { |
46a6272c | 329 | RT_TRACE(rtlpriv, COMP_SEC, DBG_EMERG, |
68e052d5 | 330 | "sta_addr is %pM\n", sta_addr); |
46a6272c C |
331 | return; |
332 | } | |
333 | /* Does STA already exist? */ | |
334 | for (i = 4; i < TOTAL_CAM_ENTRY; i++) { | |
335 | addr = rtlpriv->sec.hwsec_cam_sta_addr[i]; | |
336 | bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> i; | |
337 | if (((bitmap & BIT(0)) == BIT(0)) && | |
338 | (memcmp(addr, sta_addr, ETH_ALEN) == 0)) { | |
339 | /* Remove from HW Security CAM */ | |
ccd95369 | 340 | eth_zero_addr(rtlpriv->sec.hwsec_cam_sta_addr[i]); |
46a6272c | 341 | rtlpriv->sec.hwsec_cam_bitmap &= ~(BIT(0) << i); |
5ea27696 LF |
342 | RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, |
343 | "del CAM entry %d\n", i); | |
46a6272c C |
344 | } |
345 | } | |
346 | return; | |
347 | } | |
348 | EXPORT_SYMBOL(rtl_cam_del_entry); |