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path: root/drivers/net/wireless/realtek/rtlwifi/cam.c
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Diffstat (limited to 'drivers/net/wireless/realtek/rtlwifi/cam.c')
-rw-r--r--drivers/net/wireless/realtek/rtlwifi/cam.c343
1 files changed, 343 insertions, 0 deletions
diff --git a/drivers/net/wireless/realtek/rtlwifi/cam.c b/drivers/net/wireless/realtek/rtlwifi/cam.c
new file mode 100644
index 0000000..f7a7dcb
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtlwifi/cam.c
@@ -0,0 +1,343 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2009-2012 Realtek Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ * Contact Information:
+ * wlanfae <wlanfae@realtek.com>
+ * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
+ * Hsinchu 300, Taiwan.
+ *
+ * Larry Finger <Larry.Finger@lwfinger.net>
+ *
+ *****************************************************************************/
+#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);
+
+ RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
+ "WRITE %x: %x\n",
+ rtlpriv->cfg->maps[WCAMI], target_content);
+ RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
+ "The Key ID is %d\n", entry_no);
+ RT_TRACE(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);
+
+ RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
+ "WRITE A4: %x\n", target_content);
+ RT_TRACE(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);
+
+ RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
+ "WRITE A4: %x\n", target_content);
+ RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
+ "WRITE A0: %x\n", target_command);
+ }
+ }
+
+ RT_TRACE(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);
+
+ RT_TRACE(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) {
+ RT_TRACE(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);
+
+ RT_TRACE(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);
+
+ RT_TRACE(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);
+
+ RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG,
+ "rtl_cam_delete_one_entry(): WRITE A4: %x\n", 0);
+ RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG,
+ "rtl_cam_delete_one_entry(): WRITE A0: %x\n", 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);
+
+ RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG,
+ "rtl_cam_mark_invalid(): WRITE A4: %x\n", ul_content);
+ RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG,
+ "rtl_cam_mark_invalid(): WRITE A0: %x\n", 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);
+
+ RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
+ "rtl_cam_empty_entry(): WRITE A4: %x\n",
+ ul_content);
+ RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD,
+ "rtl_cam_empty_entry(): WRITE A0: %x\n",
+ 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);
+ RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG,
+ "&&&&&&&&&del entry %d\n", i);
+ }
+ }
+ return;
+}
+EXPORT_SYMBOL(rtl_cam_del_entry);
generated by cgit v1.2.3 (git 2.0.4) at 2024-04-23 08:53:06 +0000