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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 * 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 *
26 * Larry Finger <Larry.Finger@lwfinger.net>
27 *
28 *****************************************************************************/
29
30#include <linux/export.h>
31#include "wifi.h"
32#include "cam.h"
33
34void 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
46static 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
55 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, "key_cont_128: %6phC\n",
56 key_cont_128);
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
71 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, "WRITE %x: %x\n",
72 rtlpriv->cfg->maps[WCAMI], target_content);
73 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
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);
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
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);
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
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);
114 }
115 }
116
117 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, "after set key, usconfig:%x\n",
118 us_config);
119}
120
121u8 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
128 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
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);
132
133 if (ul_key_id == TOTAL_CAM_ENTRY) {
134 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
135 "<=== ulKeyId exceed!\n");
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,
146 key_content, us_config);
147
148 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, "<===\n");
149
150 return 1;
151
152}
153EXPORT_SYMBOL(rtl_cam_add_one_entry);
154
155int 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
161 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, "key_idx:%d\n", ul_key_id);
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,
170 "rtl_cam_delete_one_entry(): WRITE A4: %x\n", 0);
171 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG,
172 "rtl_cam_delete_one_entry(): WRITE A0: %x\n", ul_command);
173
174 return 0;
175
176}
177EXPORT_SYMBOL(rtl_cam_delete_one_entry);
178
179void 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}
187EXPORT_SYMBOL(rtl_cam_reset_all_entry);
188
189void 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,
224 "rtl_cam_mark_invalid(): WRITE A4: %x\n", ul_content);
225 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG,
226 "rtl_cam_mark_invalid(): WRITE A0: %x\n", ul_command);
227}
228EXPORT_SYMBOL(rtl_cam_mark_invalid);
229
230void 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,
274 "rtl_cam_empty_entry(): WRITE A4: %x\n",
275 ul_content);
276 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
277 "rtl_cam_empty_entry(): WRITE A0: %x\n",
278 ul_command);
279 }
280
281}
282EXPORT_SYMBOL(rtl_cam_empty_entry);
283
284u8 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) {
292 RT_TRACE(rtlpriv, COMP_SEC, DBG_EMERG, "sta_addr is NULL\n");
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 (ether_addr_equal_unaligned(addr, sta_addr))
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,
305 "-----hwsec_cam_bitmap: 0x%x entry_idx=%d\n",
306 rtlpriv->sec.hwsec_cam_bitmap, entry_idx);
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}
316EXPORT_SYMBOL(rtl_cam_get_free_entry);
317
318void 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) {
325 RT_TRACE(rtlpriv, COMP_SEC, DBG_EMERG, "sta_addr is NULL\n");
326 }
327
328 if (is_zero_ether_addr(sta_addr)) {
329 RT_TRACE(rtlpriv, COMP_SEC, DBG_EMERG,
330 "sta_addr is %pM\n", sta_addr);
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 (ether_addr_equal_unaligned(addr, sta_addr))) {
339 /* Remove from HW Security CAM */
340 eth_zero_addr(rtlpriv->sec.hwsec_cam_sta_addr[i]);
341 rtlpriv->sec.hwsec_cam_bitmap &= ~(BIT(0) << i);
342 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
343 "del CAM entry %d\n", i);
344 }
345 }
346 return;
347}
348EXPORT_SYMBOL(rtl_cam_del_entry);