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// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/* Copyright(c) 2019-2020 Realtek Corporation
*/
#include "cam.h"
#include "debug.h"
#include "mac.h"
#include "ps.h"
#include "ser.h"
#include "util.h"
#define SER_RECFG_TIMEOUT 1000
enum ser_evt {
SER_EV_NONE,
SER_EV_STATE_IN,
SER_EV_STATE_OUT,
SER_EV_L1_RESET, /* M1 */
SER_EV_DO_RECOVERY, /* M3 */
SER_EV_MAC_RESET_DONE, /* M5 */
SER_EV_L2_RESET,
SER_EV_L2_RECFG_DONE,
SER_EV_L2_RECFG_TIMEOUT,
SER_EV_M3_TIMEOUT,
SER_EV_FW_M5_TIMEOUT,
SER_EV_L0_RESET,
SER_EV_MAXX
};
enum ser_state {
SER_IDLE_ST,
SER_RESET_TRX_ST,
SER_DO_HCI_ST,
SER_L2_RESET_ST,
SER_ST_MAX_ST
};
struct ser_msg {
struct list_head list;
u8 event;
};
struct state_ent {
u8 state;
char *name;
void (*st_func)(struct rtw89_ser *ser, u8 event);
};
struct event_ent {
u8 event;
char *name;
};
static char *ser_ev_name(struct rtw89_ser *ser, u8 event)
{
if (event < SER_EV_MAXX)
return ser->ev_tbl[event].name;
return "err_ev_name";
}
static char *ser_st_name(struct rtw89_ser *ser)
{
if (ser->state < SER_ST_MAX_ST)
return ser->st_tbl[ser->state].name;
return "err_st_name";
}
static void ser_state_run(struct rtw89_ser *ser, u8 evt)
{
struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
rtw89_debug(rtwdev, RTW89_DBG_SER, "ser: %s receive %s\n",
ser_st_name(ser), ser_ev_name(ser, evt));
rtw89_leave_lps(rtwdev);
ser->st_tbl[ser->state].st_func(ser, evt);
}
static void ser_state_goto(struct rtw89_ser *ser, u8 new_state)
{
struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
if (ser->state == new_state || new_state >= SER_ST_MAX_ST)
return;
ser_state_run(ser, SER_EV_STATE_OUT);
rtw89_debug(rtwdev, RTW89_DBG_SER, "ser: %s goto -> %s\n",
ser_st_name(ser), ser->st_tbl[new_state].name);
ser->state = new_state;
ser_state_run(ser, SER_EV_STATE_IN);
}
static struct ser_msg *__rtw89_ser_dequeue_msg(struct rtw89_ser *ser)
{
struct ser_msg *msg;
spin_lock_irq(&ser->msg_q_lock);
msg = list_first_entry_or_null(&ser->msg_q, struct ser_msg, list);
if (msg)
list_del(&msg->list);
spin_unlock_irq(&ser->msg_q_lock);
return msg;
}
static void rtw89_ser_hdl_work(struct work_struct *work)
{
struct ser_msg *msg;
struct rtw89_ser *ser = container_of(work, struct rtw89_ser,
ser_hdl_work);
while ((msg = __rtw89_ser_dequeue_msg(ser))) {
ser_state_run(ser, msg->event);
kfree(msg);
}
}
static int ser_send_msg(struct rtw89_ser *ser, u8 event)
{
struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
struct ser_msg *msg = NULL;
if (test_bit(RTW89_SER_DRV_STOP_RUN, ser->flags))
return -EIO;
msg = kmalloc(sizeof(*msg), GFP_ATOMIC);
if (!msg)
return -ENOMEM;
msg->event = event;
spin_lock_irq(&ser->msg_q_lock);
list_add(&msg->list, &ser->msg_q);
spin_unlock_irq(&ser->msg_q_lock);
ieee80211_queue_work(rtwdev->hw, &ser->ser_hdl_work);
return 0;
}
static void rtw89_ser_alarm_work(struct work_struct *work)
{
struct rtw89_ser *ser = container_of(work, struct rtw89_ser,
ser_alarm_work.work);
ser_send_msg(ser, ser->alarm_event);
ser->alarm_event = SER_EV_NONE;
}
static void ser_set_alarm(struct rtw89_ser *ser, u32 ms, u8 event)
{
struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
if (test_bit(RTW89_SER_DRV_STOP_RUN, ser->flags))
return;
ser->alarm_event = event;
ieee80211_queue_delayed_work(rtwdev->hw, &ser->ser_alarm_work,
msecs_to_jiffies(ms));
}
static void ser_del_alarm(struct rtw89_ser *ser)
{
cancel_delayed_work(&ser->ser_alarm_work);
ser->alarm_event = SER_EV_NONE;
}
/* driver function */
static void drv_stop_tx(struct rtw89_ser *ser)
{
struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
ieee80211_stop_queues(rtwdev->hw);
set_bit(RTW89_SER_DRV_STOP_TX, ser->flags);
}
static void drv_stop_rx(struct rtw89_ser *ser)
{
struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
clear_bit(RTW89_FLAG_RUNNING, rtwdev->flags);
set_bit(RTW89_SER_DRV_STOP_RX, ser->flags);
}
static void drv_trx_reset(struct rtw89_ser *ser)
{
struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
rtw89_hci_reset(rtwdev);
}
static void drv_resume_tx(struct rtw89_ser *ser)
{
struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
if (!test_bit(RTW89_SER_DRV_STOP_TX, ser->flags))
return;
ieee80211_wake_queues(rtwdev->hw);
clear_bit(RTW89_SER_DRV_STOP_TX, ser->flags);
}
static void drv_resume_rx(struct rtw89_ser *ser)
{
struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
if (!test_bit(RTW89_SER_DRV_STOP_RX, ser->flags))
return;
set_bit(RTW89_FLAG_RUNNING, rtwdev->flags);
clear_bit(RTW89_SER_DRV_STOP_RX, ser->flags);
}
static void ser_reset_vif(struct rtw89_dev *rtwdev, struct rtw89_vif *rtwvif)
{
rtw89_core_release_bit_map(rtwdev->hw_port, rtwvif->port);
rtwvif->net_type = RTW89_NET_TYPE_NO_LINK;
rtwvif->trigger = false;
}
static void ser_reset_mac_binding(struct rtw89_dev *rtwdev)
{
struct rtw89_vif *rtwvif;
rtw89_cam_reset_keys(rtwdev);
rtw89_core_release_all_bits_map(rtwdev->mac_id_map, RTW89_MAX_MAC_ID_NUM);
rtw89_for_each_rtwvif(rtwdev, rtwvif)
ser_reset_vif(rtwdev, rtwvif);
}
/* hal function */
static int hal_enable_dma(struct rtw89_ser *ser)
{
struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
int ret;
if (!test_bit(RTW89_SER_HAL_STOP_DMA, ser->flags))
return 0;
if (!rtwdev->hci.ops->mac_lv1_rcvy)
return -EIO;
ret = rtwdev->hci.ops->mac_lv1_rcvy(rtwdev, RTW89_LV1_RCVY_STEP_2);
if (!ret)
clear_bit(RTW89_SER_HAL_STOP_DMA, ser->flags);
return ret;
}
static int hal_stop_dma(struct rtw89_ser *ser)
{
struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
int ret;
if (!rtwdev->hci.ops->mac_lv1_rcvy)
return -EIO;
ret = rtwdev->hci.ops->mac_lv1_rcvy(rtwdev, RTW89_LV1_RCVY_STEP_1);
if (!ret)
set_bit(RTW89_SER_HAL_STOP_DMA, ser->flags);
return ret;
}
static void hal_send_m2_event(struct rtw89_ser *ser)
{
struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
rtw89_mac_set_err_status(rtwdev, MAC_AX_ERR_L1_DISABLE_EN);
}
static void hal_send_m4_event(struct rtw89_ser *ser)
{
struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
rtw89_mac_set_err_status(rtwdev, MAC_AX_ERR_L1_RCVY_EN);
}
/* state handler */
static void ser_idle_st_hdl(struct rtw89_ser *ser, u8 evt)
{
switch (evt) {
case SER_EV_STATE_IN:
break;
case SER_EV_L1_RESET:
ser_state_goto(ser, SER_RESET_TRX_ST);
break;
case SER_EV_L2_RESET:
ser_state_goto(ser, SER_L2_RESET_ST);
break;
case SER_EV_STATE_OUT:
default:
break;
}
}
static void ser_reset_trx_st_hdl(struct rtw89_ser *ser, u8 evt)
{
switch (evt) {
case SER_EV_STATE_IN:
drv_stop_tx(ser);
if (hal_stop_dma(ser)) {
ser_state_goto(ser, SER_L2_RESET_ST);
break;
}
drv_stop_rx(ser);
drv_trx_reset(ser);
/* wait m3 */
hal_send_m2_event(ser);
/* set alarm to prevent FW response timeout */
ser_set_alarm(ser, 1000, SER_EV_M3_TIMEOUT);
break;
case SER_EV_DO_RECOVERY:
ser_state_goto(ser, SER_DO_HCI_ST);
break;
case SER_EV_M3_TIMEOUT:
ser_state_goto(ser, SER_L2_RESET_ST);
break;
case SER_EV_STATE_OUT:
ser_del_alarm(ser);
hal_enable_dma(ser);
drv_resume_rx(ser);
drv_resume_tx(ser);
break;
default:
break;
}
}
static void ser_do_hci_st_hdl(struct rtw89_ser *ser, u8 evt)
{
switch (evt) {
case SER_EV_STATE_IN:
/* wait m5 */
hal_send_m4_event(ser);
/* prevent FW response timeout */
ser_set_alarm(ser, 1000, SER_EV_FW_M5_TIMEOUT);
break;
case SER_EV_FW_M5_TIMEOUT:
ser_state_goto(ser, SER_L2_RESET_ST);
break;
case SER_EV_MAC_RESET_DONE:
ser_state_goto(ser, SER_IDLE_ST);
break;
case SER_EV_STATE_OUT:
ser_del_alarm(ser);
break;
default:
break;
}
}
static void ser_l2_reset_st_hdl(struct rtw89_ser *ser, u8 evt)
{
struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
switch (evt) {
case SER_EV_STATE_IN:
mutex_lock(&rtwdev->mutex);
ser_reset_mac_binding(rtwdev);
rtw89_core_stop(rtwdev);
mutex_unlock(&rtwdev->mutex);
ieee80211_restart_hw(rtwdev->hw);
ser_set_alarm(ser, SER_RECFG_TIMEOUT, SER_EV_L2_RECFG_TIMEOUT);
break;
case SER_EV_L2_RECFG_TIMEOUT:
rtw89_info(rtwdev, "Err: ser L2 re-config timeout\n");
fallthrough;
case SER_EV_L2_RECFG_DONE:
ser_state_goto(ser, SER_IDLE_ST);
break;
case SER_EV_STATE_OUT:
ser_del_alarm(ser);
break;
default:
break;
}
}
static struct event_ent ser_ev_tbl[] = {
{SER_EV_NONE, "SER_EV_NONE"},
{SER_EV_STATE_IN, "SER_EV_STATE_IN"},
{SER_EV_STATE_OUT, "SER_EV_STATE_OUT"},
{SER_EV_L1_RESET, "SER_EV_L1_RESET"},
{SER_EV_DO_RECOVERY, "SER_EV_DO_RECOVERY m3"},
{SER_EV_MAC_RESET_DONE, "SER_EV_MAC_RESET_DONE m5"},
{SER_EV_L2_RESET, "SER_EV_L2_RESET"},
{SER_EV_L2_RECFG_DONE, "SER_EV_L2_RECFG_DONE"},
{SER_EV_L2_RECFG_TIMEOUT, "SER_EV_L2_RECFG_TIMEOUT"},
{SER_EV_M3_TIMEOUT, "SER_EV_M3_TIMEOUT"},
{SER_EV_FW_M5_TIMEOUT, "SER_EV_FW_M5_TIMEOUT"},
{SER_EV_L0_RESET, "SER_EV_L0_RESET"},
{SER_EV_MAXX, "SER_EV_MAX"}
};
static struct state_ent ser_st_tbl[] = {
{SER_IDLE_ST, "SER_IDLE_ST", ser_idle_st_hdl},
{SER_RESET_TRX_ST, "SER_RESET_TRX_ST", ser_reset_trx_st_hdl},
{SER_DO_HCI_ST, "SER_DO_HCI_ST", ser_do_hci_st_hdl},
{SER_L2_RESET_ST, "SER_L2_RESET_ST", ser_l2_reset_st_hdl}
};
int rtw89_ser_init(struct rtw89_dev *rtwdev)
{
struct rtw89_ser *ser = &rtwdev->ser;
memset(ser, 0, sizeof(*ser));
INIT_LIST_HEAD(&ser->msg_q);
ser->state = SER_IDLE_ST;
ser->st_tbl = ser_st_tbl;
ser->ev_tbl = ser_ev_tbl;
bitmap_zero(ser->flags, RTW89_NUM_OF_SER_FLAGS);
spin_lock_init(&ser->msg_q_lock);
INIT_WORK(&ser->ser_hdl_work, rtw89_ser_hdl_work);
INIT_DELAYED_WORK(&ser->ser_alarm_work, rtw89_ser_alarm_work);
return 0;
}
int rtw89_ser_deinit(struct rtw89_dev *rtwdev)
{
struct rtw89_ser *ser = (struct rtw89_ser *)&rtwdev->ser;
set_bit(RTW89_SER_DRV_STOP_RUN, ser->flags);
cancel_delayed_work_sync(&ser->ser_alarm_work);
cancel_work_sync(&ser->ser_hdl_work);
clear_bit(RTW89_SER_DRV_STOP_RUN, ser->flags);
return 0;
}
void rtw89_ser_recfg_done(struct rtw89_dev *rtwdev)
{
ser_send_msg(&rtwdev->ser, SER_EV_L2_RECFG_DONE);
}
int rtw89_ser_notify(struct rtw89_dev *rtwdev, u32 err)
{
u8 event = SER_EV_NONE;
rtw89_info(rtwdev, "ser event = 0x%04x\n", err);
switch (err) {
case MAC_AX_ERR_L1_ERR_DMAC:
case MAC_AX_ERR_L0_PROMOTE_TO_L1:
event = SER_EV_L1_RESET; /* M1 */
break;
case MAC_AX_ERR_L1_RESET_DISABLE_DMAC_DONE:
event = SER_EV_DO_RECOVERY; /* M3 */
break;
case MAC_AX_ERR_L1_RESET_RECOVERY_DONE:
event = SER_EV_MAC_RESET_DONE; /* M5 */
break;
case MAC_AX_ERR_L0_ERR_CMAC0:
case MAC_AX_ERR_L0_ERR_CMAC1:
case MAC_AX_ERR_L0_RESET_DONE:
event = SER_EV_L0_RESET;
break;
default:
if (err == MAC_AX_ERR_L1_PROMOTE_TO_L2 ||
(err >= MAC_AX_ERR_L2_ERR_AH_DMA &&
err <= MAC_AX_GET_ERR_MAX))
event = SER_EV_L2_RESET;
break;
}
if (event == SER_EV_NONE)
return -EINVAL;
ser_send_msg(&rtwdev->ser, event);
return 0;
}
EXPORT_SYMBOL(rtw89_ser_notify);
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