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// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2009-2012 Realtek Corporation.*/
#include "wifi.h"
#include "cam.h"
#include <linux/export.h>
void rtl_cam_reset_sec_info(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
rtlpriv->sec.use_defaultkey = false;
rtlpriv->sec.pairwise_enc_algorithm = NO_ENCRYPTION;
rtlpriv->sec.group_enc_algorithm = NO_ENCRYPTION;
memset(rtlpriv->sec.key_buf, 0, KEY_BUF_SIZE * MAX_KEY_LEN);
memset(rtlpriv->sec.key_len, 0, KEY_BUF_SIZE);
rtlpriv->sec.pairwise_key = NULL;
}
static void rtl_cam_program_entry(struct ieee80211_hw *hw, u32 entry_no,
u8 *mac_addr, u8 *key_cont_128, u16 us_config)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
u32 target_command;
u32 target_content = 0;
int entry_i;
RT_PRINT_DATA(rtlpriv, COMP_SEC, DBG_DMESG, "Key content :",
key_cont_128, 16);
/* 0-1 config + mac, 2-5 fill 128key,6-7 are reserved */
for (entry_i = CAM_CONTENT_COUNT - 1; entry_i >= 0; entry_i--) {
target_command = entry_i + CAM_CONTENT_COUNT * entry_no;
target_command = target_command | BIT(31) | BIT(16);
if (entry_i == 0) {
target_content = (u32) (*(mac_addr + 0)) << 16 |
(u32) (*(mac_addr + 1)) << 24 | (u32) us_config;
rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
target_content);
rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
target_command);
rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
"WRITE %x: %x\n",
rtlpriv->cfg->maps[WCAMI], target_content);
rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
"The Key ID is %d\n", entry_no);
rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
"WRITE %x: %x\n",
rtlpriv->cfg->maps[RWCAM], target_command);
} else if (entry_i == 1) {
target_content = (u32) (*(mac_addr + 5)) << 24 |
(u32) (*(mac_addr + 4)) << 16 |
(u32) (*(mac_addr + 3)) << 8 |
(u32) (*(mac_addr + 2));
rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
target_content);
rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
target_command);
rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
"WRITE A4: %x\n", target_content);
rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
"WRITE A0: %x\n", target_command);
} else {
target_content =
(u32) (*(key_cont_128 + (entry_i * 4 - 8) + 3)) <<
24 | (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 2))
<< 16 |
(u32) (*(key_cont_128 + (entry_i * 4 - 8) + 1)) << 8
| (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 0));
rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
target_content);
rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
target_command);
rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
"WRITE A4: %x\n", target_content);
rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
"WRITE A0: %x\n", target_command);
}
}
rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
"after set key, usconfig:%x\n", us_config);
}
u8 rtl_cam_add_one_entry(struct ieee80211_hw *hw, u8 *mac_addr,
u32 ul_key_id, u32 ul_entry_idx, u32 ul_enc_alg,
u32 ul_default_key, u8 *key_content)
{
u32 us_config;
struct rtl_priv *rtlpriv = rtl_priv(hw);
rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG,
"EntryNo:%x, ulKeyId=%x, ulEncAlg=%x, ulUseDK=%x MacAddr %pM\n",
ul_entry_idx, ul_key_id, ul_enc_alg,
ul_default_key, mac_addr);
if (ul_key_id == TOTAL_CAM_ENTRY) {
rtl_dbg(rtlpriv, COMP_ERR, DBG_WARNING,
"ulKeyId exceed!\n");
return 0;
}
if (ul_default_key == 1)
us_config = CFG_VALID | ((u16) (ul_enc_alg) << 2);
else
us_config = CFG_VALID | ((ul_enc_alg) << 2) | ul_key_id;
rtl_cam_program_entry(hw, ul_entry_idx, mac_addr,
(u8 *)key_content, us_config);
rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG, "end\n");
return 1;
}
EXPORT_SYMBOL(rtl_cam_add_one_entry);
int rtl_cam_delete_one_entry(struct ieee80211_hw *hw,
u8 *mac_addr, u32 ul_key_id)
{
u32 ul_command;
struct rtl_priv *rtlpriv = rtl_priv(hw);
rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG, "key_idx:%d\n", ul_key_id);
ul_command = ul_key_id * CAM_CONTENT_COUNT;
ul_command = ul_command | BIT(31) | BIT(16);
rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], 0);
rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG,
"%s: WRITE A4: %x\n", __func__, 0);
rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG,
"%s: WRITE A0: %x\n", __func__, ul_command);
return 0;
}
EXPORT_SYMBOL(rtl_cam_delete_one_entry);
void rtl_cam_reset_all_entry(struct ieee80211_hw *hw)
{
u32 ul_command;
struct rtl_priv *rtlpriv = rtl_priv(hw);
ul_command = BIT(31) | BIT(30);
rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
}
EXPORT_SYMBOL(rtl_cam_reset_all_entry);
void rtl_cam_mark_invalid(struct ieee80211_hw *hw, u8 uc_index)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
u32 ul_command;
u32 ul_content;
u32 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];
switch (rtlpriv->sec.pairwise_enc_algorithm) {
case WEP40_ENCRYPTION:
ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP40];
break;
case WEP104_ENCRYPTION:
ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP104];
break;
case TKIP_ENCRYPTION:
ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_TKIP];
break;
case AESCCMP_ENCRYPTION:
ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];
break;
default:
ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];
}
ul_content = (uc_index & 3) | ((u16) (ul_enc_algo) << 2);
ul_content |= BIT(15);
ul_command = CAM_CONTENT_COUNT * uc_index;
ul_command = ul_command | BIT(31) | BIT(16);
rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content);
rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG,
"%s: WRITE A4: %x\n", __func__, ul_content);
rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG,
"%s: WRITE A0: %x\n", __func__, ul_command);
}
EXPORT_SYMBOL(rtl_cam_mark_invalid);
void rtl_cam_empty_entry(struct ieee80211_hw *hw, u8 uc_index)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
u32 ul_command;
u32 ul_content;
u32 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
u8 entry_i;
switch (rtlpriv->sec.pairwise_enc_algorithm) {
case WEP40_ENCRYPTION:
ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP40];
break;
case WEP104_ENCRYPTION:
ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP104];
break;
case TKIP_ENCRYPTION:
ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_TKIP];
break;
case AESCCMP_ENCRYPTION:
ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
break;
default:
ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
}
for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) {
if (entry_i == 0) {
ul_content =
(uc_index & 0x03) | ((u16) (ul_encalgo) << 2);
ul_content |= BIT(15);
} else {
ul_content = 0;
}
ul_command = CAM_CONTENT_COUNT * uc_index + entry_i;
ul_command = ul_command | BIT(31) | BIT(16);
rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content);
rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
"%s: WRITE A4: %x\n", __func__, ul_content);
rtl_dbg(rtlpriv, COMP_SEC, DBG_LOUD,
"%s: WRITE A0: %x\n", __func__, ul_command);
}
}
EXPORT_SYMBOL(rtl_cam_empty_entry);
u8 rtl_cam_get_free_entry(struct ieee80211_hw *hw, u8 *sta_addr)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
u32 bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> 4;
u8 entry_idx = 0;
u8 i, *addr;
if (NULL == sta_addr) {
pr_err("sta_addr is NULL.\n");
return TOTAL_CAM_ENTRY;
}
/* Does STA already exist? */
for (i = 4; i < TOTAL_CAM_ENTRY; i++) {
addr = rtlpriv->sec.hwsec_cam_sta_addr[i];
if (ether_addr_equal_unaligned(addr, sta_addr))
return i;
}
/* Get a free CAM entry. */
for (entry_idx = 4; entry_idx < TOTAL_CAM_ENTRY; entry_idx++) {
if ((bitmap & BIT(0)) == 0) {
pr_err("-----hwsec_cam_bitmap: 0x%x entry_idx=%d\n",
rtlpriv->sec.hwsec_cam_bitmap, entry_idx);
rtlpriv->sec.hwsec_cam_bitmap |= BIT(0) << entry_idx;
memcpy(rtlpriv->sec.hwsec_cam_sta_addr[entry_idx],
sta_addr, ETH_ALEN);
return entry_idx;
}
bitmap = bitmap >> 1;
}
return TOTAL_CAM_ENTRY;
}
EXPORT_SYMBOL(rtl_cam_get_free_entry);
void rtl_cam_del_entry(struct ieee80211_hw *hw, u8 *sta_addr)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
u32 bitmap;
u8 i, *addr;
if (NULL == sta_addr) {
pr_err("sta_addr is NULL.\n");
return;
}
if (is_zero_ether_addr(sta_addr)) {
pr_err("sta_addr is %pM\n", sta_addr);
return;
}
/* Does STA already exist? */
for (i = 4; i < TOTAL_CAM_ENTRY; i++) {
addr = rtlpriv->sec.hwsec_cam_sta_addr[i];
bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> i;
if (((bitmap & BIT(0)) == BIT(0)) &&
(ether_addr_equal_unaligned(addr, sta_addr))) {
/* Remove from HW Security CAM */
eth_zero_addr(rtlpriv->sec.hwsec_cam_sta_addr[i]);
rtlpriv->sec.hwsec_cam_bitmap &= ~(BIT(0) << i);
rtl_dbg(rtlpriv, COMP_SEC, DBG_DMESG,
"&&&&&&&&&del entry %d\n", i);
}
}
return;
}
EXPORT_SYMBOL(rtl_cam_del_entry);
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