1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2009-2012 Realtek Corporation.*/
3
4 #include "wifi.h"
5 #include "cam.h"
6 #include <linux/export.h>
7
rtl_cam_reset_sec_info(struct ieee80211_hw * hw)8 void rtl_cam_reset_sec_info(struct ieee80211_hw *hw)
9 {
10 struct rtl_priv *rtlpriv = rtl_priv(hw);
11
12 rtlpriv->sec.use_defaultkey = false;
13 rtlpriv->sec.pairwise_enc_algorithm = NO_ENCRYPTION;
14 rtlpriv->sec.group_enc_algorithm = NO_ENCRYPTION;
15 memset(rtlpriv->sec.key_buf, 0, KEY_BUF_SIZE * MAX_KEY_LEN);
16 memset(rtlpriv->sec.key_len, 0, KEY_BUF_SIZE);
17 rtlpriv->sec.pairwise_key = NULL;
18 }
19
rtl_cam_program_entry(struct ieee80211_hw * hw,u32 entry_no,const u8 * mac_addr,u8 * key_cont_128,u16 us_config)20 static void rtl_cam_program_entry(struct ieee80211_hw *hw, u32 entry_no,
21 const u8 *mac_addr, u8 *key_cont_128,
22 u16 us_config)
23 {
24 struct rtl_priv *rtlpriv = rtl_priv(hw);
25
26 u32 target_command;
27 u32 target_content = 0;
28 int entry_i;
29
30 RT_PRINT_DATA(rtlpriv, COMP_SEC, DBG_DMESG, "Key content :",
31 key_cont_128, 16);
32
33 /* 0-1 config + mac, 2-5 fill 128key,6-7 are reserved */
34 for (entry_i = CAM_CONTENT_COUNT - 1; entry_i >= 0; entry_i--) {
35 target_command = entry_i + CAM_CONTENT_COUNT * entry_no;
36 target_command = target_command | BIT(31) | BIT(16);
37
38 if (entry_i == 0) {
39 target_content = (u32) (*(mac_addr + 0)) << 16 |
40 (u32) (*(mac_addr + 1)) << 24 | (u32) us_config;
41
42 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
43 target_content);
44 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
45 target_command);
46
47 rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
48 "WRITE %x: %x\n",
49 rtlpriv->cfg->maps[WCAMI], target_content);
50 rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
51 "The Key ID is %d\n", entry_no);
52 rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
53 "WRITE %x: %x\n",
54 rtlpriv->cfg->maps[RWCAM], target_command);
55
56 } else if (entry_i == 1) {
57
58 target_content = (u32) (*(mac_addr + 5)) << 24 |
59 (u32) (*(mac_addr + 4)) << 16 |
60 (u32) (*(mac_addr + 3)) << 8 |
61 (u32) (*(mac_addr + 2));
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 rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
69 "WRITE A4: %x\n", target_content);
70 rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
71 "WRITE A0: %x\n", target_command);
72
73 } else {
74
75 target_content =
76 (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 3)) <<
77 24 | (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 2))
78 << 16 |
79 (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 1)) << 8
80 | (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 0));
81
82 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
83 target_content);
84 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
85 target_command);
86
87 rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
88 "WRITE A4: %x\n", target_content);
89 rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
90 "WRITE A0: %x\n", target_command);
91 }
92 }
93
94 rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
95 "after set key, usconfig:%x\n", us_config);
96 }
97
rtl_cam_add_one_entry(struct ieee80211_hw * hw,const u8 * mac_addr,u32 ul_key_id,u32 ul_entry_idx,u32 ul_enc_alg,u32 ul_default_key,u8 * key_content)98 u8 rtl_cam_add_one_entry(struct ieee80211_hw *hw, const u8 *mac_addr,
99 u32 ul_key_id, u32 ul_entry_idx, u32 ul_enc_alg,
100 u32 ul_default_key, u8 *key_content)
101 {
102 u32 us_config;
103 struct rtl_priv *rtlpriv = rtl_priv(hw);
104
105 rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG,
106 "EntryNo:%x, ulKeyId=%x, ulEncAlg=%x, ulUseDK=%x MacAddr %pM\n",
107 ul_entry_idx, ul_key_id, ul_enc_alg,
108 ul_default_key, mac_addr);
109
110 if (ul_key_id == TOTAL_CAM_ENTRY) {
111 rtl_dbg(rtlpriv, COMP_ERR, DBG_WARNING,
112 "ulKeyId exceed!\n");
113 return 0;
114 }
115
116 if (ul_default_key == 1)
117 us_config = CFG_VALID | ((u16) (ul_enc_alg) << 2);
118 else
119 us_config = CFG_VALID | ((ul_enc_alg) << 2) | ul_key_id;
120
121 rtl_cam_program_entry(hw, ul_entry_idx, mac_addr,
122 (u8 *)key_content, us_config);
123
124 rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG, "end\n");
125
126 return 1;
127
128 }
129 EXPORT_SYMBOL(rtl_cam_add_one_entry);
130
rtl_cam_delete_one_entry(struct ieee80211_hw * hw,u8 * mac_addr,u32 ul_key_id)131 int rtl_cam_delete_one_entry(struct ieee80211_hw *hw,
132 u8 *mac_addr, u32 ul_key_id)
133 {
134 u32 ul_command;
135 struct rtl_priv *rtlpriv = rtl_priv(hw);
136
137 rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG, "key_idx:%d\n", ul_key_id);
138
139 ul_command = ul_key_id * CAM_CONTENT_COUNT;
140 ul_command = ul_command | BIT(31) | BIT(16);
141
142 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], 0);
143 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
144
145 rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG,
146 "%s: WRITE A4: %x\n", __func__, 0);
147 rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG,
148 "%s: WRITE A0: %x\n", __func__, ul_command);
149
150 return 0;
151
152 }
153 EXPORT_SYMBOL(rtl_cam_delete_one_entry);
154
rtl_cam_reset_all_entry(struct ieee80211_hw * hw)155 void rtl_cam_reset_all_entry(struct ieee80211_hw *hw)
156 {
157 u32 ul_command;
158 struct rtl_priv *rtlpriv = rtl_priv(hw);
159
160 ul_command = BIT(31) | BIT(30);
161 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
162 }
163 EXPORT_SYMBOL(rtl_cam_reset_all_entry);
164
rtl_cam_mark_invalid(struct ieee80211_hw * hw,u8 uc_index)165 void rtl_cam_mark_invalid(struct ieee80211_hw *hw, u8 uc_index)
166 {
167 struct rtl_priv *rtlpriv = rtl_priv(hw);
168
169 u32 ul_command;
170 u32 ul_content;
171 u32 ul_enc_algo;
172
173 switch (rtlpriv->sec.pairwise_enc_algorithm) {
174 case WEP40_ENCRYPTION:
175 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP40];
176 break;
177 case WEP104_ENCRYPTION:
178 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP104];
179 break;
180 case TKIP_ENCRYPTION:
181 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_TKIP];
182 break;
183 case AESCCMP_ENCRYPTION:
184 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];
185 break;
186 default:
187 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];
188 }
189
190 ul_content = (uc_index & 3) | ((u16) (ul_enc_algo) << 2);
191
192 ul_content |= BIT(15);
193 ul_command = CAM_CONTENT_COUNT * uc_index;
194 ul_command = ul_command | BIT(31) | BIT(16);
195
196 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content);
197 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
198
199 rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG,
200 "%s: WRITE A4: %x\n", __func__, ul_content);
201 rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG,
202 "%s: WRITE A0: %x\n", __func__, ul_command);
203 }
204 EXPORT_SYMBOL(rtl_cam_mark_invalid);
205
rtl_cam_empty_entry(struct ieee80211_hw * hw,u8 uc_index)206 void rtl_cam_empty_entry(struct ieee80211_hw *hw, u8 uc_index)
207 {
208 struct rtl_priv *rtlpriv = rtl_priv(hw);
209
210 u32 ul_command;
211 u32 ul_content;
212 u32 ul_encalgo;
213 u8 entry_i;
214
215 switch (rtlpriv->sec.pairwise_enc_algorithm) {
216 case WEP40_ENCRYPTION:
217 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP40];
218 break;
219 case WEP104_ENCRYPTION:
220 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP104];
221 break;
222 case TKIP_ENCRYPTION:
223 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_TKIP];
224 break;
225 case AESCCMP_ENCRYPTION:
226 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
227 break;
228 default:
229 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
230 }
231
232 for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) {
233
234 if (entry_i == 0) {
235 ul_content =
236 (uc_index & 0x03) | ((u16) (ul_encalgo) << 2);
237 ul_content |= BIT(15);
238
239 } else {
240 ul_content = 0;
241 }
242
243 ul_command = CAM_CONTENT_COUNT * uc_index + entry_i;
244 ul_command = ul_command | BIT(31) | BIT(16);
245
246 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content);
247 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
248
249 rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
250 "%s: WRITE A4: %x\n", __func__, ul_content);
251 rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
252 "%s: WRITE A0: %x\n", __func__, ul_command);
253 }
254
255 }
256 EXPORT_SYMBOL(rtl_cam_empty_entry);
257
rtl_cam_get_free_entry(struct ieee80211_hw * hw,u8 * sta_addr)258 u8 rtl_cam_get_free_entry(struct ieee80211_hw *hw, u8 *sta_addr)
259 {
260 struct rtl_priv *rtlpriv = rtl_priv(hw);
261 u32 bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> 4;
262 u8 entry_idx = 0;
263 u8 i, *addr;
264
265 if (NULL == sta_addr) {
266 pr_err("sta_addr is NULL.\n");
267 return TOTAL_CAM_ENTRY;
268 }
269 /* Does STA already exist? */
270 for (i = 4; i < TOTAL_CAM_ENTRY; i++) {
271 addr = rtlpriv->sec.hwsec_cam_sta_addr[i];
272 if (ether_addr_equal_unaligned(addr, sta_addr))
273 return i;
274 }
275 /* Get a free CAM entry. */
276 for (entry_idx = 4; entry_idx < TOTAL_CAM_ENTRY; entry_idx++) {
277 if ((bitmap & BIT(0)) == 0) {
278 pr_err("-----hwsec_cam_bitmap: 0x%x entry_idx=%d\n",
279 rtlpriv->sec.hwsec_cam_bitmap, entry_idx);
280 rtlpriv->sec.hwsec_cam_bitmap |= BIT(0) << entry_idx;
281 memcpy(rtlpriv->sec.hwsec_cam_sta_addr[entry_idx],
282 sta_addr, ETH_ALEN);
283 return entry_idx;
284 }
285 bitmap = bitmap >> 1;
286 }
287 return TOTAL_CAM_ENTRY;
288 }
289 EXPORT_SYMBOL(rtl_cam_get_free_entry);
290
rtl_cam_del_entry(struct ieee80211_hw * hw,u8 * sta_addr)291 void rtl_cam_del_entry(struct ieee80211_hw *hw, u8 *sta_addr)
292 {
293 struct rtl_priv *rtlpriv = rtl_priv(hw);
294 u32 bitmap;
295 u8 i, *addr;
296
297 if (NULL == sta_addr) {
298 pr_err("sta_addr is NULL.\n");
299 return;
300 }
301
302 if (is_zero_ether_addr(sta_addr)) {
303 pr_err("sta_addr is %pM\n", sta_addr);
304 return;
305 }
306 /* Does STA already exist? */
307 for (i = 4; i < TOTAL_CAM_ENTRY; i++) {
308 addr = rtlpriv->sec.hwsec_cam_sta_addr[i];
309 bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> i;
310 if (((bitmap & BIT(0)) == BIT(0)) &&
311 (ether_addr_equal_unaligned(addr, sta_addr))) {
312 /* Remove from HW Security CAM */
313 eth_zero_addr(rtlpriv->sec.hwsec_cam_sta_addr[i]);
314 rtlpriv->sec.hwsec_cam_bitmap &= ~(BIT(0) << i);
315 rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG,
316 "&&&&&&&&&del entry %d\n", i);
317 }
318 }
319 return;
320 }
321 EXPORT_SYMBOL(rtl_cam_del_entry);
322