wifi: rtw89: debug: support SER L0 simulation

SER (system error recovery) can deal with different crash types by
different levels of processes. Now, add a debug function to trigger
MAC error in purpose for SER L0 simulation/verification. And, extend
dbgfs fw_crash to accept different parameters.

    # simulate MAC error (one kind of SER L0)
    echo 3 > fw_crash

Normally, FW won't report SER L0 cases to driver. Instead, they will
be handled by FW directly. If unfortunately FW handling fails, SER
will rise to L1 and be reported to driver.

Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250915065329.38911-1-pkshih@realtek.com

diff --git a/drivers/net/wireless/realtek/rtw89/debug.c b/drivers/net/wireless/realtek/rtw89/debug.c
index a37cdd73ddc37da50f37bfeda72a550185da2e28..3dc7981c510fdbdde9ff6559dfad9e8f842dce1a 100644 (file)
--- a/drivers/net/wireless/realtek/rtw89/debug.c
+++ b/drivers/net/wireless/realtek/rtw89/debug.c
@@ -3563,6 +3563,58 @@ static int rtw89_dbg_trigger_ctrl_error(struct rtw89_dev *rtwdev)
        return 0;
 }
 
+static int rtw89_dbg_trigger_mac_error_ax(struct rtw89_dev *rtwdev)
+{
+       u16 val16;
+       u8 val8;
+       int ret;
+
+       ret = rtw89_mac_check_mac_en(rtwdev, RTW89_MAC_0, RTW89_CMAC_SEL);
+       if (ret)
+               return ret;
+
+       val8 = rtw89_read8(rtwdev, R_AX_CMAC_FUNC_EN);
+       rtw89_write8(rtwdev, R_AX_CMAC_FUNC_EN, val8 & ~B_AX_TMAC_EN);
+       mdelay(1);
+       rtw89_write8(rtwdev, R_AX_CMAC_FUNC_EN, val8);
+
+       val16 = rtw89_read16(rtwdev, R_AX_PTCL_IMR0);
+       rtw89_write16(rtwdev, R_AX_PTCL_IMR0, val16 | B_AX_F2PCMD_EMPTY_ERR_INT_EN);
+       rtw89_write16(rtwdev, R_AX_PTCL_IMR0, val16);
+
+       return 0;
+}
+
+static int rtw89_dbg_trigger_mac_error_be(struct rtw89_dev *rtwdev)
+{
+       int ret;
+
+       ret = rtw89_mac_check_mac_en(rtwdev, RTW89_MAC_0, RTW89_CMAC_SEL);
+       if (ret)
+               return ret;
+
+       rtw89_write32_set(rtwdev, R_BE_CMAC_FW_TRIGGER_IDCT_ISR,
+                         B_BE_CMAC_FW_TRIG_IDCT | B_BE_CMAC_FW_ERR_IDCT_IMR);
+
+       return 0;
+}
+
+static int rtw89_dbg_trigger_mac_error(struct rtw89_dev *rtwdev)
+{
+       const struct rtw89_chip_info *chip = rtwdev->chip;
+
+       rtw89_leave_ps_mode(rtwdev);
+
+       switch (chip->chip_gen) {
+       case RTW89_CHIP_AX:
+               return rtw89_dbg_trigger_mac_error_ax(rtwdev);
+       case RTW89_CHIP_BE:
+               return rtw89_dbg_trigger_mac_error_be(rtwdev);
+       default:
+               return -EOPNOTSUPP;
+       }
+}
+
 static ssize_t
 rtw89_debug_priv_fw_crash_get(struct rtw89_dev *rtwdev,
                              struct rtw89_debugfs_priv *debugfs_priv,
@@ -3578,6 +3630,7 @@ rtw89_debug_priv_fw_crash_get(struct rtw89_dev *rtwdev,
 enum rtw89_dbg_crash_simulation_type {
        RTW89_DBG_SIM_CPU_EXCEPTION = 1,
        RTW89_DBG_SIM_CTRL_ERROR = 2,
+       RTW89_DBG_SIM_MAC_ERROR = 3,
 };
 
 static ssize_t
@@ -3586,6 +3639,7 @@ rtw89_debug_priv_fw_crash_set(struct rtw89_dev *rtwdev,
                              const char *buf, size_t count)
 {
        int (*sim)(struct rtw89_dev *rtwdev);
+       bool announce = true;
        u8 crash_type;
        int ret;
 
@@ -3604,11 +3658,19 @@ rtw89_debug_priv_fw_crash_set(struct rtw89_dev *rtwdev,
        case RTW89_DBG_SIM_CTRL_ERROR:
                sim = rtw89_dbg_trigger_ctrl_error;
                break;
+       case RTW89_DBG_SIM_MAC_ERROR:
+               sim = rtw89_dbg_trigger_mac_error;
+
+               /* Driver SER flow won't get involved; only FW will. */
+               announce = false;
+               break;
        default:
                return -EINVAL;
        }
 
-       set_bit(RTW89_FLAG_CRASH_SIMULATING, rtwdev->flags);
+       if (announce)
+               set_bit(RTW89_FLAG_CRASH_SIMULATING, rtwdev->flags);
+
        ret = sim(rtwdev);
 
        if (ret)

diff --git a/drivers/net/wireless/realtek/rtw89/reg.h b/drivers/net/wireless/realtek/rtw89/reg.h
index d94d73e50e930ffee0f2e5e3f0c8d318d5c7b599..ed1d958bc49e3c14167c36d097f03a4d9f71d3c7 100644 (file)
--- a/drivers/net/wireless/realtek/rtw89/reg.h
+++ b/drivers/net/wireless/realtek/rtw89/reg.h
@@ -6262,6 +6262,11 @@
 #define B_BE_PTCL_TOP_ERR_IND BIT(1)
 #define B_BE_SCHEDULE_TOP_ERR_IND BIT(0)
 
+#define R_BE_CMAC_FW_TRIGGER_IDCT_ISR 0x10168
+#define R_BE_CMAC_FW_TRIGGER_IDCT_ISR_C1 0x14168
+#define B_BE_CMAC_FW_ERR_IDCT_IMR BIT(31)
+#define B_BE_CMAC_FW_TRIG_IDCT BIT(0)
+
 #define R_BE_SER_L0_DBG_CNT 0x10170
 #define R_BE_SER_L0_DBG_CNT_C1 0x14170
 #define B_BE_SER_L0_PHYINTF_CNT_MASK GENMASK(31, 24)