diff options
author | Tzu-En Huang <tehuang@realtek.com> | 2020-09-25 14:12:18 +0800 |
---|---|---|
committer | Kalle Valo <kvalo@codeaurora.org> | 2020-09-29 11:22:21 +0300 |
commit | 714f71f94ab34aa14393c305e43debd83928f98c (patch) | |
tree | 0757c3a48f06ee7af22bfab4c6b0ca08cc79e08d | |
parent | 0fbc2f0f34cc57e8d6076631733e0095ac031995 (diff) | |
download | linux-714f71f94ab34aa14393c305e43debd83928f98c.tar.bz2 |
rtw88: add dump fw crash log
This patch adds a function which is able to dump firmware fifo when
firmware crashes. If firmware needs more than one time to dump all logs,
it will set a bit called "more bit" in the header of the first log, and
driver needs to set a register to inform firmware that it is ready for the
next dump.
Signed-off-by: Tzu-En Huang <tehuang@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200925061219.23754-5-tehuang@realtek.com
-rw-r--r-- | drivers/net/wireless/realtek/rtw88/fw.h | 14 | ||||
-rw-r--r-- | drivers/net/wireless/realtek/rtw88/main.c | 61 | ||||
-rw-r--r-- | drivers/net/wireless/realtek/rtw88/main.h | 4 | ||||
-rw-r--r-- | drivers/net/wireless/realtek/rtw88/reg.h | 2 |
4 files changed, 81 insertions, 0 deletions
diff --git a/drivers/net/wireless/realtek/rtw88/fw.h b/drivers/net/wireless/realtek/rtw88/fw.h index 9c4863c011ba..08644540d259 100644 --- a/drivers/net/wireless/realtek/rtw88/fw.h +++ b/drivers/net/wireless/realtek/rtw88/fw.h @@ -507,6 +507,20 @@ static inline void rtw_h2c_pkt_set_header(u8 *h2c_pkt, u8 sub_id) #define SET_NLO_LOC_NLO_INFO(h2c_pkt, value) \ le32p_replace_bits((__le32 *)(h2c_pkt) + 0x00, value, GENMASK(23, 16)) +#define GET_FW_DUMP_LEN(_header) \ + le32_get_bits(*((__le32 *)(_header) + 0x00), GENMASK(15, 0)) +#define GET_FW_DUMP_SEQ(_header) \ + le32_get_bits(*((__le32 *)(_header) + 0x00), GENMASK(22, 16)) +#define GET_FW_DUMP_MORE(_header) \ + le32_get_bits(*((__le32 *)(_header) + 0x00), BIT(23)) +#define GET_FW_DUMP_VERSION(_header) \ + le32_get_bits(*((__le32 *)(_header) + 0x00), GENMASK(31, 24)) +#define GET_FW_DUMP_TLV_TYPE(_header) \ + le32_get_bits(*((__le32 *)(_header) + 0x01), GENMASK(15, 0)) +#define GET_FW_DUMP_TLV_LEN(_header) \ + le32_get_bits(*((__le32 *)(_header) + 0x01), GENMASK(31, 16)) +#define GET_FW_DUMP_TLV_VAL(_header) \ + le32_get_bits(*((__le32 *)(_header) + 0x02), GENMASK(31, 0)) static inline struct rtw_c2h_cmd *get_c2h_from_skb(struct sk_buff *skb) { u32 pkt_offset; diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c index 420853eaf270..565efd880624 100644 --- a/drivers/net/wireless/realtek/rtw88/main.c +++ b/drivers/net/wireless/realtek/rtw88/main.c @@ -317,6 +317,56 @@ void rtw_sta_remove(struct rtw_dev *rtwdev, struct ieee80211_sta *sta, sta->addr, si->mac_id); } +static bool rtw_fw_dump_crash_log(struct rtw_dev *rtwdev) +{ + u32 size = rtwdev->chip->fw_rxff_size; + u32 *buf; + u8 seq; + bool ret = true; + + buf = vmalloc(size); + if (!buf) + goto exit; + + if (rtw_fw_dump_fifo(rtwdev, RTW_FW_FIFO_SEL_RXBUF_FW, 0, size, buf)) { + rtw_dbg(rtwdev, RTW_DBG_FW, "dump fw fifo fail\n"); + goto free_buf; + } + + if (GET_FW_DUMP_LEN(buf) == 0) { + rtw_dbg(rtwdev, RTW_DBG_FW, "fw crash dump's length is 0\n"); + goto free_buf; + } + + seq = GET_FW_DUMP_SEQ(buf); + if (seq > 0 && seq != (rtwdev->fw.prev_dump_seq + 1)) { + rtw_dbg(rtwdev, RTW_DBG_FW, + "fw crash dump's seq is wrong: %d\n", seq); + goto free_buf; + } + if (seq == 0 && + (GET_FW_DUMP_TLV_TYPE(buf) != FW_CD_TYPE || + GET_FW_DUMP_TLV_LEN(buf) != FW_CD_LEN || + GET_FW_DUMP_TLV_VAL(buf) != FW_CD_VAL)) { + rtw_dbg(rtwdev, RTW_DBG_FW, "fw crash dump's tlv is wrong\n"); + goto free_buf; + } + + print_hex_dump_bytes("rtw88 fw dump: ", DUMP_PREFIX_OFFSET, buf, size); + + if (GET_FW_DUMP_MORE(buf) == 1) { + rtwdev->fw.prev_dump_seq = seq; + ret = false; + } + +free_buf: + vfree(buf); +exit: + rtw_write8(rtwdev, REG_MCU_TST_CFG, 0); + + return ret; +} + void rtw_vif_assoc_changed(struct rtw_vif *rtwvif, struct ieee80211_bss_conf *conf) { @@ -373,6 +423,17 @@ static void rtw_fw_recovery_work(struct work_struct *work) struct rtw_dev *rtwdev = container_of(work, struct rtw_dev, fw_recovery_work); + /* rtw_fw_dump_crash_log() returns false indicates that there are + * still more log to dump. Driver set 0x1cf[7:0] = 0x1 to tell firmware + * to dump the remaining part of the log, and firmware will trigger an + * IMR_C2HCMD interrupt to inform driver the log is ready. + */ + if (!rtw_fw_dump_crash_log(rtwdev)) { + rtw_write8(rtwdev, REG_HRCV_MSG, 1); + return; + } + rtwdev->fw.prev_dump_seq = 0; + WARN(1, "firmware crash, start reset and recover\n"); mutex_lock(&rtwdev->mutex); diff --git a/drivers/net/wireless/realtek/rtw88/main.h b/drivers/net/wireless/realtek/rtw88/main.h index 06bdc68555e7..ffb02e614217 100644 --- a/drivers/net/wireless/realtek/rtw88/main.h +++ b/drivers/net/wireless/realtek/rtw88/main.h @@ -1621,6 +1621,9 @@ struct rtw_fifo_conf { const struct rtw_rqpn *rqpn; }; +#define FW_CD_TYPE 0xffff +#define FW_CD_LEN 4 +#define FW_CD_VAL 0xaabbccdd struct rtw_fw_state { const struct firmware *firmware; struct rtw_dev *rtwdev; @@ -1629,6 +1632,7 @@ struct rtw_fw_state { u8 sub_version; u8 sub_index; u16 h2c_version; + u8 prev_dump_seq; }; struct rtw_hal { diff --git a/drivers/net/wireless/realtek/rtw88/reg.h b/drivers/net/wireless/realtek/rtw88/reg.h index 9a696ac17d69..86b94c008a27 100644 --- a/drivers/net/wireless/realtek/rtw88/reg.h +++ b/drivers/net/wireless/realtek/rtw88/reg.h @@ -619,6 +619,8 @@ #define BIT_ANAPAR_BTPS BIT(22) #define REG_RSTB_SEL 0x1c38 +#define REG_HRCV_MSG 0x1cf + #define REG_IGN_GNTBT4 0x4160 #define RF_MODE 0x00 |