tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/******************************************************************************
2 *
3 * Copyright(c) 2009-2010 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#include "wifi.h"
30#include "cam.h"
31#include <linux/export.h>
32
33void rtl_cam_reset_sec_info(struct ieee80211_hw *hw)
34{
35 struct rtl_priv *rtlpriv = rtl_priv(hw);
36
37 rtlpriv->sec.use_defaultkey = false;
38 rtlpriv->sec.pairwise_enc_algorithm = NO_ENCRYPTION;
39 rtlpriv->sec.group_enc_algorithm = NO_ENCRYPTION;
40 memset(rtlpriv->sec.key_buf, 0, KEY_BUF_SIZE * MAX_KEY_LEN);
41 memset(rtlpriv->sec.key_len, 0, KEY_BUF_SIZE);
42 rtlpriv->sec.pairwise_key = NULL;
43}
44
45static void rtl_cam_program_entry(struct ieee80211_hw *hw, u32 entry_no,
46 u8 *mac_addr, u8 *key_cont_128, u16 us_config)
47{
48 struct rtl_priv *rtlpriv = rtl_priv(hw);
49
50 u32 target_command;
51 u32 target_content = 0;
52 u8 entry_i;
53
54 RT_PRINT_DATA(rtlpriv, COMP_SEC, DBG_DMESG, "Key content :",
55 key_cont_128, 16);
56
57 for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) {
58 target_command = entry_i + CAM_CONTENT_COUNT * entry_no;
59 target_command = target_command | BIT(31) | BIT(16);
60
61 if (entry_i == 0) {
62 target_content = (u32) (*(mac_addr + 0)) << 16 |
63 (u32) (*(mac_addr + 1)) << 24 | (u32) us_config;
64
65 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
66 target_content);
67 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
68 target_command);
69
70 RT_TRACE(COMP_SEC, DBG_LOUD,
71 ("WRITE %x: %x \n",
72 rtlpriv->cfg->maps[WCAMI], target_content));
73 RT_TRACE(COMP_SEC, DBG_LOUD,
74 ("The Key ID is %d\n", entry_no));
75 RT_TRACE(COMP_SEC, DBG_LOUD,
76 ("WRITE %x: %x \n",
77 rtlpriv->cfg->maps[RWCAM], target_command));
78
79 } else if (entry_i == 1) {
80
81 target_content = (u32) (*(mac_addr + 5)) << 24 |
82 (u32) (*(mac_addr + 4)) << 16 |
83 (u32) (*(mac_addr + 3)) << 8 |
84 (u32) (*(mac_addr + 2));
85
86 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
87 target_content);
88 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
89 target_command);
90
91 RT_TRACE(COMP_SEC, DBG_LOUD,
92 ("WRITE A4: %x \n", target_content));
93 RT_TRACE(COMP_SEC, DBG_LOUD,
94 ("WRITE A0: %x \n", target_command));
95
96 } else {
97
98 target_content =
99 (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 3)) <<
100 24 | (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 2))
101 << 16 |
102 (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 1)) << 8
103 | (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 0));
104
105 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
106 target_content);
107 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
108 target_command);
109 udelay(100);
110
111 RT_TRACE(COMP_SEC, DBG_LOUD,
112 ("WRITE A4: %x \n", target_content));
113 RT_TRACE(COMP_SEC, DBG_LOUD,
114 ("WRITE A0: %x \n", target_command));
115 }
116 }
117
118 RT_TRACE(COMP_SEC, DBG_LOUD,
119 ("after set key, usconfig:%x\n", us_config));
120}
121
122u8 rtl_cam_add_one_entry(struct ieee80211_hw *hw, u8 *mac_addr,
123 u32 ul_key_id, u32 ul_entry_idx, u32 ul_enc_alg,
124 u32 ul_default_key, u8 *key_content)
125{
126 u32 us_config;
127 struct rtl_priv *rtlpriv = rtl_priv(hw);
128
129 RT_TRACE(COMP_SEC, DBG_DMESG,
130 ("EntryNo:%x, ulKeyId=%x, ulEncAlg=%x, "
131 "ulUseDK=%x MacAddr %pM\n",
132 ul_entry_idx, ul_key_id, ul_enc_alg,
133 ul_default_key, mac_addr));
134
135 if (ul_key_id == TOTAL_CAM_ENTRY) {
136 RT_TRACE(COMP_ERR, DBG_WARNING,
137 ("ulKeyId exceed!\n"));
138 return 0;
139 }
140
141 if (ul_default_key == 1) {
142 us_config = CFG_VALID | ((u16) (ul_enc_alg) << 2);
143 } else {
144 us_config = CFG_VALID | ((ul_enc_alg) << 2) | ul_key_id;
145 }
146
147 rtl_cam_program_entry(hw, ul_entry_idx, mac_addr,
148 (u8 *) key_content, us_config);
149
150 RT_TRACE(COMP_SEC, DBG_DMESG, ("end \n"));
151
152 return 1;
153
154}
155
156int rtl_cam_delete_one_entry(struct ieee80211_hw *hw,
157 u8 *mac_addr, u32 ul_key_id)
158{
159 u32 ul_command;
160 struct rtl_priv *rtlpriv = rtl_priv(hw);
161
162 RT_TRACE(COMP_SEC, DBG_DMESG, ("key_idx:%d\n", ul_key_id));
163
164 ul_command = ul_key_id * CAM_CONTENT_COUNT;
165 ul_command = ul_command | BIT(31) | BIT(16);
166
167 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], 0);
168 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
169
170 RT_TRACE(COMP_SEC, DBG_DMESG,
171 ("rtl_cam_delete_one_entry(): WRITE A4: %x \n", 0));
172 RT_TRACE(COMP_SEC, DBG_DMESG,
173 ("rtl_cam_delete_one_entry(): WRITE A0: %x \n", ul_command));
174
175 return 0;
176
177}
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}
187
188void rtl_cam_mark_invalid(struct ieee80211_hw *hw, u8 uc_index)
189{
190 struct rtl_priv *rtlpriv = rtl_priv(hw);
191
192 u32 ul_command;
193 u32 ul_content;
194 u32 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];
195
196 switch (rtlpriv->sec.pairwise_enc_algorithm) {
197 case WEP40_ENCRYPTION:
198 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP40];
199 break;
200 case WEP104_ENCRYPTION:
201 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP104];
202 break;
203 case TKIP_ENCRYPTION:
204 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_TKIP];
205 break;
206 case AESCCMP_ENCRYPTION:
207 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];
208 break;
209 default:
210 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];
211 }
212
213 ul_content = (uc_index & 3) | ((u16) (ul_enc_algo) << 2);
214
215 ul_content |= BIT(15);
216 ul_command = CAM_CONTENT_COUNT * uc_index;
217 ul_command = ul_command | BIT(31) | BIT(16);
218
219 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content);
220 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
221
222 RT_TRACE(COMP_SEC, DBG_DMESG,
223 ("rtl_cam_mark_invalid(): WRITE A4: %x \n", ul_content));
224 RT_TRACE(COMP_SEC, DBG_DMESG,
225 ("rtl_cam_mark_invalid(): WRITE A0: %x \n", ul_command));
226}
227
228void rtl_cam_empty_entry(struct ieee80211_hw *hw, u8 uc_index)
229{
230 struct rtl_priv *rtlpriv = rtl_priv(hw);
231
232 u32 ul_command;
233 u32 ul_content;
234 u32 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
235 u8 entry_i;
236
237 switch (rtlpriv->sec.pairwise_enc_algorithm) {
238 case WEP40_ENCRYPTION:
239 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP40];
240 break;
241 case WEP104_ENCRYPTION:
242 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP104];
243 break;
244 case TKIP_ENCRYPTION:
245 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_TKIP];
246 break;
247 case AESCCMP_ENCRYPTION:
248 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
249 break;
250 default:
251 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
252 }
253
254 for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) {
255
256 if (entry_i == 0) {
257 ul_content =
258 (uc_index & 0x03) | ((u16) (ul_encalgo) << 2);
259 ul_content |= BIT(15);
260
261 } else {
262 ul_content = 0;
263 }
264
265 ul_command = CAM_CONTENT_COUNT * uc_index + entry_i;
266 ul_command = ul_command | BIT(31) | BIT(16);
267
268 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content);
269 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
270
271 RT_TRACE(COMP_SEC, DBG_LOUD,
272 ("rtl_cam_empty_entry(): WRITE A4: %x \n",
273 ul_content));
274 RT_TRACE(COMP_SEC, DBG_LOUD,
275 ("rtl_cam_empty_entry(): WRITE A0: %x \n",
276 ul_command));
277 }
278
279}
280
281u8 rtl_cam_get_free_entry(struct ieee80211_hw *hw, u8 *sta_addr)
282{
283 struct rtl_priv *rtlpriv = rtl_priv(hw);
284 u32 bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> 4;
285 u8 entry_idx = 0;
286 u8 i, *addr;
287
288 if (NULL == sta_addr) {
289 RT_TRACE(COMP_SEC, DBG_EMERG,
290 ("sta_addr is NULL.\n"));
291 return TOTAL_CAM_ENTRY;
292 }
293 /* Does STA already exist? */
294 for (i = 4; i < TOTAL_CAM_ENTRY; i++) {
295 addr = rtlpriv->sec.hwsec_cam_sta_addr[i];
296 if(memcmp(addr, sta_addr, ETH_ALEN) == 0)
297 return i;
298 }
299 /* Get a free CAM entry. */
300 for (entry_idx = 4; entry_idx < TOTAL_CAM_ENTRY; entry_idx++) {
301 if ((bitmap & BIT(0)) == 0) {
302 RT_TRACE(COMP_SEC, DBG_EMERG,
303 ("-----hwsec_cam_bitmap: 0x%x entry_idx=%d\n",
304 rtlpriv->sec.hwsec_cam_bitmap, entry_idx));
305 rtlpriv->sec.hwsec_cam_bitmap |= BIT(0) << entry_idx;
306 memcpy(rtlpriv->sec.hwsec_cam_sta_addr[entry_idx],
307 sta_addr, ETH_ALEN);
308 return entry_idx;
309 }
310 bitmap = bitmap >>1;
311 }
312 return TOTAL_CAM_ENTRY;
313}
314
315void rtl_cam_del_entry(struct ieee80211_hw *hw, u8 *sta_addr)
316{
317 struct rtl_priv *rtlpriv = rtl_priv(hw);
318 u32 bitmap;
319 u8 i, *addr;
320
321 if (NULL == sta_addr) {
322 RT_TRACE(COMP_SEC, DBG_EMERG,
323 ("sta_addr is NULL.\n"));
324 }
325
326 if ((sta_addr[0]|sta_addr[1]|sta_addr[2]|sta_addr[3]|\
327 sta_addr[4]|sta_addr[5]) == 0) {
328 RT_TRACE(COMP_SEC, DBG_EMERG,
329 ("sta_addr is 00:00:00:00:00:00.\n"));
330 return;
331 }
332 /* Does STA already exist? */
333 for (i = 4; i < TOTAL_CAM_ENTRY; i++) {
334 addr = rtlpriv->sec.hwsec_cam_sta_addr[i];
335 bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> i;
336 if (((bitmap & BIT(0)) == BIT(0)) &&
337 (memcmp(addr, sta_addr, ETH_ALEN) == 0)) {
338 /* Remove from HW Security CAM */
339 memset(rtlpriv->sec.hwsec_cam_sta_addr[i], 0, ETH_ALEN);
340 rtlpriv->sec.hwsec_cam_bitmap &= ~(BIT(0) << i);
341 printk("&&&&&&&&&del entry %d\n",i);
342 }
343 }
344 return;
345}