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path: root/drivers/net/wireless/realtek/rtw88/sec.c
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Diffstat (limited to 'drivers/net/wireless/realtek/rtw88/sec.c')
-rw-r--r--drivers/net/wireless/realtek/rtw88/sec.c120
1 files changed, 120 insertions, 0 deletions
diff --git a/drivers/net/wireless/realtek/rtw88/sec.c b/drivers/net/wireless/realtek/rtw88/sec.c
new file mode 100644
index 000000000000..c594fc02804d
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw88/sec.c
@@ -0,0 +1,120 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/* Copyright(c) 2018-2019 Realtek Corporation
+ */
+
+#include "main.h"
+#include "sec.h"
+#include "reg.h"
+
+int rtw_sec_get_free_cam(struct rtw_sec_desc *sec)
+{
+ /* if default key search is enabled, the first 4 cam entries
+ * are used to direct map to group key with its key->key_idx, so
+ * driver should use cam entries after 4 to install pairwise key
+ */
+ if (sec->default_key_search)
+ return find_next_zero_bit(sec->cam_map, RTW_MAX_SEC_CAM_NUM,
+ RTW_SEC_DEFAULT_KEY_NUM);
+
+ return find_first_zero_bit(sec->cam_map, RTW_MAX_SEC_CAM_NUM);
+}
+
+void rtw_sec_write_cam(struct rtw_dev *rtwdev,
+ struct rtw_sec_desc *sec,
+ struct ieee80211_sta *sta,
+ struct ieee80211_key_conf *key,
+ u8 hw_key_type, u8 hw_key_idx)
+{
+ struct rtw_cam_entry *cam = &sec->cam_table[hw_key_idx];
+ u32 write_cmd;
+ u32 command;
+ u32 content;
+ u32 addr;
+ int i, j;
+
+ set_bit(hw_key_idx, sec->cam_map);
+ cam->valid = true;
+ cam->group = !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE);
+ cam->hw_key_type = hw_key_type;
+ cam->key = key;
+ if (sta)
+ ether_addr_copy(cam->addr, sta->addr);
+ else
+ eth_broadcast_addr(cam->addr);
+
+ write_cmd = RTW_SEC_CMD_WRITE_ENABLE | RTW_SEC_CMD_POLLING;
+ addr = hw_key_idx << RTW_SEC_CAM_ENTRY_SHIFT;
+ for (i = 5; i >= 0; i--) {
+ switch (i) {
+ case 0:
+ content = ((key->keyidx & 0x3)) |
+ ((hw_key_type & 0x7) << 2) |
+ (cam->group << 6) |
+ (cam->valid << 15) |
+ (cam->addr[0] << 16) |
+ (cam->addr[1] << 24);
+ break;
+ case 1:
+ content = (cam->addr[2]) |
+ (cam->addr[3] << 8) |
+ (cam->addr[4] << 16) |
+ (cam->addr[5] << 24);
+ break;
+ default:
+ j = (i - 2) << 2;
+ content = (key->key[j]) |
+ (key->key[j + 1] << 8) |
+ (key->key[j + 2] << 16) |
+ (key->key[j + 3] << 24);
+ break;
+ }
+
+ command = write_cmd | (addr + i);
+ rtw_write32(rtwdev, RTW_SEC_WRITE_REG, content);
+ rtw_write32(rtwdev, RTW_SEC_CMD_REG, command);
+ }
+}
+
+void rtw_sec_clear_cam(struct rtw_dev *rtwdev,
+ struct rtw_sec_desc *sec,
+ u8 hw_key_idx)
+{
+ struct rtw_cam_entry *cam = &sec->cam_table[hw_key_idx];
+ u32 write_cmd;
+ u32 command;
+ u32 addr;
+
+ clear_bit(hw_key_idx, sec->cam_map);
+ cam->valid = false;
+ cam->key = NULL;
+ eth_zero_addr(cam->addr);
+
+ write_cmd = RTW_SEC_CMD_WRITE_ENABLE | RTW_SEC_CMD_POLLING;
+ addr = hw_key_idx << RTW_SEC_CAM_ENTRY_SHIFT;
+ command = write_cmd | addr;
+ rtw_write32(rtwdev, RTW_SEC_WRITE_REG, 0);
+ rtw_write32(rtwdev, RTW_SEC_CMD_REG, command);
+}
+
+void rtw_sec_enable_sec_engine(struct rtw_dev *rtwdev)
+{
+ struct rtw_sec_desc *sec = &rtwdev->sec;
+ u16 ctrl_reg;
+ u16 sec_config;
+
+ /* default use default key search for now */
+ sec->default_key_search = true;
+
+ ctrl_reg = rtw_read16(rtwdev, REG_CR);
+ ctrl_reg |= RTW_SEC_ENGINE_EN;
+ rtw_write16(rtwdev, REG_CR, ctrl_reg);
+
+ sec_config = rtw_read16(rtwdev, RTW_SEC_CONFIG);
+
+ sec_config |= RTW_SEC_TX_DEC_EN | RTW_SEC_RX_DEC_EN;
+ if (sec->default_key_search)
+ sec_config |= RTW_SEC_TX_UNI_USE_DK | RTW_SEC_RX_UNI_USE_DK |
+ RTW_SEC_TX_BC_USE_DK | RTW_SEC_RX_BC_USE_DK;
+
+ rtw_write16(rtwdev, RTW_SEC_CONFIG, sec_config);
+}