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);
+}