04b786e009
Compare with LCLK mode, PG mode saves more power, by turning off more circuits. Therefore, to recover from PG mode, driver needs to backup some information into rsvd page. Such as CAM entries, DPK results. As CAM entries can change, it is required to re-download CAM entries after set_key. Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
142 lines
3.5 KiB
C
142 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
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/* Copyright(c) 2018-2019 Realtek Corporation
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*/
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#include "main.h"
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#include "sec.h"
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#include "reg.h"
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int rtw_sec_get_free_cam(struct rtw_sec_desc *sec)
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{
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/* if default key search is enabled, the first 4 cam entries
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* are used to direct map to group key with its key->key_idx, so
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* driver should use cam entries after 4 to install pairwise key
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*/
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if (sec->default_key_search)
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return find_next_zero_bit(sec->cam_map, RTW_MAX_SEC_CAM_NUM,
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RTW_SEC_DEFAULT_KEY_NUM);
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return find_first_zero_bit(sec->cam_map, RTW_MAX_SEC_CAM_NUM);
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}
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void rtw_sec_write_cam(struct rtw_dev *rtwdev,
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struct rtw_sec_desc *sec,
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struct ieee80211_sta *sta,
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struct ieee80211_key_conf *key,
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u8 hw_key_type, u8 hw_key_idx)
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{
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struct rtw_cam_entry *cam = &sec->cam_table[hw_key_idx];
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u32 write_cmd;
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u32 command;
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u32 content;
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u32 addr;
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int i, j;
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set_bit(hw_key_idx, sec->cam_map);
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cam->valid = true;
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cam->group = !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE);
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cam->hw_key_type = hw_key_type;
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cam->key = key;
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if (sta)
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ether_addr_copy(cam->addr, sta->addr);
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else
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eth_broadcast_addr(cam->addr);
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write_cmd = RTW_SEC_CMD_WRITE_ENABLE | RTW_SEC_CMD_POLLING;
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addr = hw_key_idx << RTW_SEC_CAM_ENTRY_SHIFT;
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for (i = 5; i >= 0; i--) {
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switch (i) {
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case 0:
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content = ((key->keyidx & 0x3)) |
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((hw_key_type & 0x7) << 2) |
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(cam->group << 6) |
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(cam->valid << 15) |
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(cam->addr[0] << 16) |
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(cam->addr[1] << 24);
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break;
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case 1:
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content = (cam->addr[2]) |
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(cam->addr[3] << 8) |
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(cam->addr[4] << 16) |
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(cam->addr[5] << 24);
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break;
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default:
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j = (i - 2) << 2;
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content = (key->key[j]) |
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(key->key[j + 1] << 8) |
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(key->key[j + 2] << 16) |
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(key->key[j + 3] << 24);
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break;
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}
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command = write_cmd | (addr + i);
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rtw_write32(rtwdev, RTW_SEC_WRITE_REG, content);
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rtw_write32(rtwdev, RTW_SEC_CMD_REG, command);
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}
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}
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void rtw_sec_clear_cam(struct rtw_dev *rtwdev,
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struct rtw_sec_desc *sec,
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u8 hw_key_idx)
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{
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struct rtw_cam_entry *cam = &sec->cam_table[hw_key_idx];
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u32 write_cmd;
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u32 command;
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u32 addr;
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clear_bit(hw_key_idx, sec->cam_map);
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cam->valid = false;
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cam->key = NULL;
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eth_zero_addr(cam->addr);
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write_cmd = RTW_SEC_CMD_WRITE_ENABLE | RTW_SEC_CMD_POLLING;
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addr = hw_key_idx << RTW_SEC_CAM_ENTRY_SHIFT;
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command = write_cmd | addr;
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rtw_write32(rtwdev, RTW_SEC_WRITE_REG, 0);
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rtw_write32(rtwdev, RTW_SEC_CMD_REG, command);
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}
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u8 rtw_sec_cam_pg_backup(struct rtw_dev *rtwdev, u8 *used_cam)
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{
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struct rtw_sec_desc *sec = &rtwdev->sec;
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u8 offset = 0;
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u8 count, n;
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if (!used_cam)
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return 0;
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for (count = 0; count < MAX_PG_CAM_BACKUP_NUM; count++) {
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n = find_next_bit(sec->cam_map, RTW_MAX_SEC_CAM_NUM, offset);
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if (n == RTW_MAX_SEC_CAM_NUM)
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break;
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used_cam[count] = n;
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offset = n + 1;
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}
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return count;
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}
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void rtw_sec_enable_sec_engine(struct rtw_dev *rtwdev)
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{
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struct rtw_sec_desc *sec = &rtwdev->sec;
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u16 ctrl_reg;
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u16 sec_config;
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/* default use default key search for now */
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sec->default_key_search = true;
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ctrl_reg = rtw_read16(rtwdev, REG_CR);
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ctrl_reg |= RTW_SEC_ENGINE_EN;
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rtw_write16(rtwdev, REG_CR, ctrl_reg);
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sec_config = rtw_read16(rtwdev, RTW_SEC_CONFIG);
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sec_config |= RTW_SEC_TX_DEC_EN | RTW_SEC_RX_DEC_EN;
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if (sec->default_key_search)
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sec_config |= RTW_SEC_TX_UNI_USE_DK | RTW_SEC_RX_UNI_USE_DK |
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RTW_SEC_TX_BC_USE_DK | RTW_SEC_RX_BC_USE_DK;
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rtw_write16(rtwdev, RTW_SEC_CONFIG, sec_config);
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}
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