tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/******************************************************************************
3 *
4 * Copyright(c) 2009-2012 Realtek Corporation.
5 *
6 * Contact Information:
7 * wlanfae <wlanfae@realtek.com>
8 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
9 * Hsinchu 300, Taiwan.
10 *
11 * Larry Finger <Larry.Finger@lwfinger.net>
12 *
13 *****************************************************************************/
14#include "wifi.h"
15#include "cam.h"
16#include <linux/export.h>
17
18void rtl_cam_reset_sec_info(struct ieee80211_hw *hw)
19{
20 struct rtl_priv *rtlpriv = rtl_priv(hw);
21
22 rtlpriv->sec.use_defaultkey = false;
23 rtlpriv->sec.pairwise_enc_algorithm = NO_ENCRYPTION;
24 rtlpriv->sec.group_enc_algorithm = NO_ENCRYPTION;
25 memset(rtlpriv->sec.key_buf, 0, KEY_BUF_SIZE * MAX_KEY_LEN);
26 memset(rtlpriv->sec.key_len, 0, KEY_BUF_SIZE);
27 rtlpriv->sec.pairwise_key = NULL;
28}
29
30static void rtl_cam_program_entry(struct ieee80211_hw *hw, u32 entry_no,
31 u8 *mac_addr, u8 *key_cont_128, u16 us_config)
32{
33 struct rtl_priv *rtlpriv = rtl_priv(hw);
34
35 u32 target_command;
36 u32 target_content = 0;
37 int entry_i;
38
39 RT_PRINT_DATA(rtlpriv, COMP_SEC, DBG_DMESG, "Key content :",
40 key_cont_128, 16);
41
42 /* 0-1 config + mac, 2-5 fill 128key,6-7 are reserved */
43 for (entry_i = CAM_CONTENT_COUNT - 1; entry_i >= 0; entry_i--) {
44 target_command = entry_i + CAM_CONTENT_COUNT * entry_no;
45 target_command = target_command | BIT(31) | BIT(16);
46
47 if (entry_i == 0) {
48 target_content = (u32)(*(mac_addr + 0)) << 16 |
49 (u32)(*(mac_addr + 1)) << 24 |
50 (u32)us_config;
51
52 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
53 target_content);
54 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
55 target_command);
56
57 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
58 "WRITE %x: %x\n",
59 rtlpriv->cfg->maps[WCAMI], target_content);
60 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
61 "The Key ID is %d\n", entry_no);
62 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
63 "WRITE %x: %x\n",
64 rtlpriv->cfg->maps[RWCAM], target_command);
65
66 } else if (entry_i == 1) {
67 target_content = (u32)(*(mac_addr + 5)) << 24 |
68 (u32)(*(mac_addr + 4)) << 16 |
69 (u32)(*(mac_addr + 3)) << 8 |
70 (u32)(*(mac_addr + 2));
71
72 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
73 target_content);
74 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
75 target_command);
76
77 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
78 "WRITE A4: %x\n", target_content);
79 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
80 "WRITE A0: %x\n", target_command);
81 } else {
82 target_content =
83 (u32)(*(key_cont_128 + (entry_i * 4 - 8) + 3)) <<
84 24 | (u32)(*(key_cont_128 + (entry_i * 4 - 8) + 2))
85 << 16 |
86 (u32)(*(key_cont_128 + (entry_i * 4 - 8) + 1)) << 8
87 | (u32)(*(key_cont_128 + (entry_i * 4 - 8) + 0));
88
89 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
90 target_content);
91 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
92 target_command);
93
94 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
95 "WRITE A4: %x\n", target_content);
96 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
97 "WRITE A0: %x\n", target_command);
98 }
99 }
100
101 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
102 "after set key, usconfig:%x\n", us_config);
103}
104
105u8 rtl_cam_add_one_entry(struct ieee80211_hw *hw, u8 *mac_addr,
106 u32 ul_key_id, u32 ul_entry_idx, u32 ul_enc_alg,
107 u32 ul_default_key, u8 *key_content)
108{
109 u32 us_config;
110 struct rtl_priv *rtlpriv = rtl_priv(hw);
111
112 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG,
113 "EntryNo:%x, ulKeyId=%x, ulEncAlg=%x, ulUseDK=%x MacAddr %pM\n",
114 ul_entry_idx, ul_key_id, ul_enc_alg,
115 ul_default_key, mac_addr);
116
117 if (ul_key_id == TOTAL_CAM_ENTRY) {
118 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
119 "ulKeyId exceed!\n");
120 return 0;
121 }
122
123 if (ul_default_key == 1)
124 us_config = CFG_VALID | ((u16)(ul_enc_alg) << 2);
125 else
126 us_config = CFG_VALID | ((ul_enc_alg) << 2) | ul_key_id;
127
128 rtl_cam_program_entry(hw, ul_entry_idx, mac_addr,
129 (u8 *)key_content, us_config);
130
131 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, "end\n");
132
133 return 1;
134}
135
136int rtl_cam_delete_one_entry(struct ieee80211_hw *hw,
137 u8 *mac_addr, u32 ul_key_id)
138{
139 u32 ul_command;
140 struct rtl_priv *rtlpriv = rtl_priv(hw);
141
142 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG, "key_idx:%d\n", ul_key_id);
143
144 ul_command = ul_key_id * CAM_CONTENT_COUNT;
145 ul_command = ul_command | BIT(31) | BIT(16);
146
147 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], 0);
148 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
149
150 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG,
151 "%s(): WRITE A4: %x\n", __func__, 0);
152 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG,
153 "%s(): WRITE A0: %x\n", __func__, ul_command);
154
155 return 0;
156}
157
158void rtl_cam_reset_all_entry(struct ieee80211_hw *hw)
159{
160 u32 ul_command;
161 struct rtl_priv *rtlpriv = rtl_priv(hw);
162
163 ul_command = BIT(31) | BIT(30);
164 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
165}
166
167void rtl_cam_mark_invalid(struct ieee80211_hw *hw, u8 uc_index)
168{
169 struct rtl_priv *rtlpriv = rtl_priv(hw);
170
171 u32 ul_command;
172 u32 ul_content;
173 u32 ul_enc_algo;
174
175 switch (rtlpriv->sec.pairwise_enc_algorithm) {
176 case WEP40_ENCRYPTION:
177 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP40];
178 break;
179 case WEP104_ENCRYPTION:
180 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP104];
181 break;
182 case TKIP_ENCRYPTION:
183 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_TKIP];
184 break;
185 case AESCCMP_ENCRYPTION:
186 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];
187 break;
188 default:
189 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];
190 }
191
192 ul_content = (uc_index & 3) | ((u16)(ul_enc_algo) << 2);
193
194 ul_content |= BIT(15);
195 ul_command = CAM_CONTENT_COUNT * uc_index;
196 ul_command = ul_command | BIT(31) | BIT(16);
197
198 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content);
199 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
200
201 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG,
202 "%s(): WRITE A4: %x\n", __func__, ul_content);
203 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG,
204 "%s(): WRITE A0: %x\n", __func__, ul_command);
205}
206
207void rtl_cam_empty_entry(struct ieee80211_hw *hw, u8 uc_index)
208{
209 struct rtl_priv *rtlpriv = rtl_priv(hw);
210
211 u32 ul_command;
212 u32 ul_content;
213 u32 ul_encalgo;
214 u8 entry_i;
215
216 switch (rtlpriv->sec.pairwise_enc_algorithm) {
217 case WEP40_ENCRYPTION:
218 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP40];
219 break;
220 case WEP104_ENCRYPTION:
221 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP104];
222 break;
223 case TKIP_ENCRYPTION:
224 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_TKIP];
225 break;
226 case AESCCMP_ENCRYPTION:
227 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
228 break;
229 default:
230 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
231 }
232
233 for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) {
234 if (entry_i == 0) {
235 ul_content =
236 (uc_index & 0x03) | ((u16)(ul_encalgo) << 2);
237 ul_content |= BIT(15);
238 } else {
239 ul_content = 0;
240 }
241
242 ul_command = CAM_CONTENT_COUNT * uc_index + entry_i;
243 ul_command = ul_command | BIT(31) | BIT(16);
244
245 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content);
246 rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
247
248 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
249 "%s(): WRITE A4: %x\n", __func__, ul_content);
250 RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
251 "%s(): WRITE A0: %x\n", __func__, ul_command);
252 }
253}
254
255u8 rtl_cam_get_free_entry(struct ieee80211_hw *hw, u8 *sta_addr)
256{
257 struct rtl_priv *rtlpriv = rtl_priv(hw);
258 u32 bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> 4;
259 u8 entry_idx = 0;
260 u8 i, *addr;
261
262 if (!sta_addr) {
263 pr_err("sta_addr is NULL.\n");
264 return TOTAL_CAM_ENTRY;
265 }
266 /* Does STA already exist? */
267 for (i = 4; i < TOTAL_CAM_ENTRY; i++) {
268 addr = rtlpriv->sec.hwsec_cam_sta_addr[i];
269 if (ether_addr_equal_unaligned(addr, sta_addr))
270 return i;
271 }
272 /* Get a free CAM entry. */
273 for (entry_idx = 4; entry_idx < TOTAL_CAM_ENTRY; entry_idx++) {
274 if ((bitmap & BIT(0)) == 0) {
275 pr_err("-----hwsec_cam_bitmap: 0x%x entry_idx=%d\n",
276 rtlpriv->sec.hwsec_cam_bitmap, entry_idx);
277 rtlpriv->sec.hwsec_cam_bitmap |= BIT(0) << entry_idx;
278 memcpy(rtlpriv->sec.hwsec_cam_sta_addr[entry_idx],
279 sta_addr, ETH_ALEN);
280 return entry_idx;
281 }
282 bitmap = bitmap >> 1;
283 }
284 return TOTAL_CAM_ENTRY;
285}
286
287void rtl_cam_del_entry(struct ieee80211_hw *hw, u8 *sta_addr)
288{
289 struct rtl_priv *rtlpriv = rtl_priv(hw);
290 u32 bitmap;
291 u8 i, *addr;
292
293 if (!sta_addr) {
294 pr_err("sta_addr is NULL.\n");
295 return;
296 }
297
298 if (is_zero_ether_addr(sta_addr)) {
299 pr_err("sta_addr is %pM\n", sta_addr);
300 return;
301 }
302 /* Does STA already exist? */
303 for (i = 4; i < TOTAL_CAM_ENTRY; i++) {
304 addr = rtlpriv->sec.hwsec_cam_sta_addr[i];
305 bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> i;
306 if (((bitmap & BIT(0)) == BIT(0)) &&
307 (ether_addr_equal_unaligned(addr, sta_addr))) {
308 /* Remove from HW Security CAM */
309 eth_zero_addr(rtlpriv->sec.hwsec_cam_sta_addr[i]);
310 rtlpriv->sec.hwsec_cam_bitmap &= ~(BIT(0) << i);
311 RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG,
312 "&&&&&&&&&del entry %d\n", i);
313 }
314 }
315}