1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /* Copyright(c) 2018-2019 Realtek Corporation
9 int rtw_sec_get_free_cam(struct rtw_sec_desc *sec)
11 /* if default key search is enabled, the first 4 cam entries
12 * are used to direct map to group key with its key->key_idx, so
13 * driver should use cam entries after 4 to install pairwise key
15 if (sec->default_key_search)
16 return find_next_zero_bit(sec->cam_map, RTW_MAX_SEC_CAM_NUM,
17 RTW_SEC_DEFAULT_KEY_NUM);
19 return find_first_zero_bit(sec->cam_map, RTW_MAX_SEC_CAM_NUM);
22 void rtw_sec_write_cam(struct rtw_dev *rtwdev,
23 struct rtw_sec_desc *sec,
24 struct ieee80211_sta *sta,
25 struct ieee80211_key_conf *key,
26 u8 hw_key_type, u8 hw_key_idx)
28 struct rtw_cam_entry *cam = &sec->cam_table[hw_key_idx];
35 set_bit(hw_key_idx, sec->cam_map);
37 cam->group = !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE);
38 cam->hw_key_type = hw_key_type;
41 ether_addr_copy(cam->addr, sta->addr);
43 eth_broadcast_addr(cam->addr);
45 write_cmd = RTW_SEC_CMD_WRITE_ENABLE | RTW_SEC_CMD_POLLING;
46 addr = hw_key_idx << RTW_SEC_CAM_ENTRY_SHIFT;
47 for (i = 5; i >= 0; i--) {
50 content = ((key->keyidx & 0x3)) |
51 ((hw_key_type & 0x7) << 2) |
54 (cam->addr[0] << 16) |
58 content = (cam->addr[2]) |
60 (cam->addr[4] << 16) |
65 content = (key->key[j]) |
66 (key->key[j + 1] << 8) |
67 (key->key[j + 2] << 16) |
68 (key->key[j + 3] << 24);
72 command = write_cmd | (addr + i);
73 rtw_write32(rtwdev, RTW_SEC_WRITE_REG, content);
74 rtw_write32(rtwdev, RTW_SEC_CMD_REG, command);
78 void rtw_sec_clear_cam(struct rtw_dev *rtwdev,
79 struct rtw_sec_desc *sec,
82 struct rtw_cam_entry *cam = &sec->cam_table[hw_key_idx];
87 clear_bit(hw_key_idx, sec->cam_map);
90 eth_zero_addr(cam->addr);
92 write_cmd = RTW_SEC_CMD_WRITE_ENABLE | RTW_SEC_CMD_POLLING;
93 addr = hw_key_idx << RTW_SEC_CAM_ENTRY_SHIFT;
94 command = write_cmd | addr;
95 rtw_write32(rtwdev, RTW_SEC_WRITE_REG, 0);
96 rtw_write32(rtwdev, RTW_SEC_CMD_REG, command);
99 void rtw_sec_enable_sec_engine(struct rtw_dev *rtwdev)
101 struct rtw_sec_desc *sec = &rtwdev->sec;
105 /* default use default key search for now */
106 sec->default_key_search = true;
108 ctrl_reg = rtw_read16(rtwdev, REG_CR);
109 ctrl_reg |= RTW_SEC_ENGINE_EN;
110 rtw_write16(rtwdev, REG_CR, ctrl_reg);
112 sec_config = rtw_read16(rtwdev, RTW_SEC_CONFIG);
114 sec_config |= RTW_SEC_TX_DEC_EN | RTW_SEC_RX_DEC_EN;
115 if (sec->default_key_search)
116 sec_config |= RTW_SEC_TX_UNI_USE_DK | RTW_SEC_RX_UNI_USE_DK |
117 RTW_SEC_TX_BC_USE_DK | RTW_SEC_RX_BC_USE_DK;
119 rtw_write16(rtwdev, RTW_SEC_CONFIG, sec_config);