wifi: rtw89: add counters of register-based H2C/C2H

The register-based H2C/C2H are used to exchange information between driver
and firmware, but only apply to narrow area because its data size is
smaller than regular packet-based H2C/C2H.

This kind of H2C/C2H must be paired. To identify if any H2C/C2H is missing,
update counters to help diagnose this kind of problems.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230316063956.71687-1-pkshih@realtek.com

7 files changed, 28 insertions, 0 deletions

diff --git a/drivers/net/wireless/realtek/rtw89/core.h b/drivers/net/wireless/realtek/rtw89/core.h
index ea2eb3ac1df0..62770d445713 100644
--- a/drivers/net/wireless/realtek/rtw89/core.h
+++ b/drivers/net/wireless/realtek/rtw89/core.h
@@ -3140,8 +3140,10 @@ struct rtw89_chip_info {
 	u32 txwd_body_size;
 	u32 h2c_ctrl_reg;
 	const u32 *h2c_regs;
+	struct rtw89_reg_def h2c_counter_reg;
 	u32 c2h_ctrl_reg;
 	const u32 *c2h_regs;
+	struct rtw89_reg_def c2h_counter_reg;
 	const struct rtw89_page_regs *page_regs;
 	bool cfo_src_fd;
 	const struct rtw89_reg_def *dcfo_comp;
@@ -3268,6 +3270,8 @@ struct rtw89_fw_info {
 	struct completion completion;
 	u8 h2c_seq;
 	u8 rec_seq;
+	u8 h2c_counter;
+	u8 c2h_counter;
 	struct rtw89_fw_suit normal;
 	struct rtw89_fw_suit wowlan;
 	bool fw_log_enable;
diff --git a/drivers/net/wireless/realtek/rtw89/fw.c b/drivers/net/wireless/realtek/rtw89/fw.c
index 713aefd0cf8d..5fa6863d36b3 100644
--- a/drivers/net/wireless/realtek/rtw89/fw.c
+++ b/drivers/net/wireless/realtek/rtw89/fw.c
@@ -615,6 +615,8 @@ int rtw89_fw_download(struct rtw89_dev *rtwdev, enum rtw89_fw_type type)
 
 	fw_info->h2c_seq = 0;
 	fw_info->rec_seq = 0;
+	fw_info->h2c_counter = 0;
+	fw_info->c2h_counter = 0;
 	rtwdev->mac.rpwm_seq_num = RPWM_SEQ_NUM_MAX;
 	rtwdev->mac.cpwm_seq_num = CPWM_SEQ_NUM_MAX;
 
@@ -2724,6 +2726,7 @@ static int rtw89_fw_write_h2c_reg(struct rtw89_dev *rtwdev,
 				  struct rtw89_mac_h2c_info *info)
 {
 	const struct rtw89_chip_info *chip = rtwdev->chip;
+	struct rtw89_fw_info *fw_info = &rtwdev->fw;
 	const u32 *h2c_reg = chip->h2c_regs;
 	u8 i, val, len;
 	int ret;
@@ -2743,6 +2746,9 @@ static int rtw89_fw_write_h2c_reg(struct rtw89_dev *rtwdev,
 	for (i = 0; i < RTW89_H2CREG_MAX; i++)
 		rtw89_write32(rtwdev, h2c_reg[i], info->h2creg[i]);
 
+	fw_info->h2c_counter++;
+	rtw89_write8_mask(rtwdev, chip->h2c_counter_reg.addr,
+			  chip->h2c_counter_reg.mask, fw_info->h2c_counter);
 	rtw89_write8(rtwdev, chip->h2c_ctrl_reg, B_AX_H2CREG_TRIGGER);
 
 	return 0;
@@ -2752,6 +2758,7 @@ static int rtw89_fw_read_c2h_reg(struct rtw89_dev *rtwdev,
 				 struct rtw89_mac_c2h_info *info)
 {
 	const struct rtw89_chip_info *chip = rtwdev->chip;
+	struct rtw89_fw_info *fw_info = &rtwdev->fw;
 	const u32 *c2h_reg = chip->c2h_regs;
 	u32 ret;
 	u8 i, val;
@@ -2775,6 +2782,10 @@ static int rtw89_fw_read_c2h_reg(struct rtw89_dev *rtwdev,
 	info->content_len = (RTW89_GET_C2H_HDR_LEN(*info->c2hreg) << 2) -
 				RTW89_C2HREG_HDR_LEN;
 
+	fw_info->c2h_counter++;
+	rtw89_write8_mask(rtwdev, chip->c2h_counter_reg.addr,
+			  chip->c2h_counter_reg.mask, fw_info->c2h_counter);
+
 	return 0;
 }
 
diff --git a/drivers/net/wireless/realtek/rtw89/mac.c b/drivers/net/wireless/realtek/rtw89/mac.c
index 7866fe925d24..d0e138f8b880 100644
--- a/drivers/net/wireless/realtek/rtw89/mac.c
+++ b/drivers/net/wireless/realtek/rtw89/mac.c
@@ -3398,6 +3398,8 @@ int rtw89_mac_enable_cpu(struct rtw89_dev *rtwdev, u8 boot_reason, bool dlfw)
 	if (rtw89_read32(rtwdev, R_AX_PLATFORM_ENABLE) & B_AX_WCPU_EN)
 		return -EFAULT;
 
+	rtw89_write32(rtwdev, R_AX_UDM1, 0);
+	rtw89_write32(rtwdev, R_AX_UDM2, 0);
 	rtw89_write32(rtwdev, R_AX_HALT_H2C_CTRL, 0);
 	rtw89_write32(rtwdev, R_AX_HALT_C2H_CTRL, 0);
 	rtw89_write32(rtwdev, R_AX_HALT_H2C, 0);
diff --git a/drivers/net/wireless/realtek/rtw89/reg.h b/drivers/net/wireless/realtek/rtw89/reg.h
index e5c0ab43ab7a..c75aee61f383 100644
--- a/drivers/net/wireless/realtek/rtw89/reg.h
+++ b/drivers/net/wireless/realtek/rtw89/reg.h
@@ -207,6 +207,11 @@
 
 #define R_AX_UDM0 0x01F0
 #define R_AX_UDM1 0x01F4
+#define B_AX_UDM1_MASK GENMASK(31, 16)
+#define B_AX_UDM1_HALMAC_C2H_ENQ_CNT_MASK GENMASK(15, 12)
+#define B_AX_UDM1_HALMAC_H2C_DEQ_CNT_MASK GENMASK(11, 8)
+#define B_AX_UDM1_WCPU_C2H_ENQ_CNT_MASK GENMASK(7, 4)
+#define B_AX_UDM1_WCPU_H2C_DEQ_CNT_MASK GENMASK(3, 0)
 #define R_AX_UDM2 0x01F8
 #define R_AX_UDM3 0x01FC
 
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852a.c b/drivers/net/wireless/realtek/rtw89/rtw8852a.c
index 152f715d55d5..e6f8df929a95 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852a.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852a.c
@@ -2136,9 +2136,11 @@ const struct rtw89_chip_info rtw8852a_chip_info = {
 	.h2c_desc_size		= sizeof(struct rtw89_txwd_body),
 	.txwd_body_size		= sizeof(struct rtw89_txwd_body),
 	.h2c_ctrl_reg		= R_AX_H2CREG_CTRL,
+	.h2c_counter_reg	= {R_AX_UDM1 + 1, B_AX_UDM1_HALMAC_H2C_DEQ_CNT_MASK >> 8},
 	.h2c_regs		= rtw8852a_h2c_regs,
 	.c2h_ctrl_reg		= R_AX_C2HREG_CTRL,
 	.c2h_regs		= rtw8852a_c2h_regs,
+	.c2h_counter_reg	= {R_AX_UDM1 + 1, B_AX_UDM1_HALMAC_C2H_ENQ_CNT_MASK >> 8},
 	.page_regs		= &rtw8852a_page_regs,
 	.cfo_src_fd		= false,
 	.dcfo_comp		= &rtw8852a_dcfo_comp,
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852b.c b/drivers/net/wireless/realtek/rtw89/rtw8852b.c
index 7bab6d2ab776..27733a3da6df 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852b.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852b.c
@@ -2557,8 +2557,10 @@ const struct rtw89_chip_info rtw8852b_chip_info = {
 	.h2c_desc_size		= sizeof(struct rtw89_txwd_body),
 	.txwd_body_size		= sizeof(struct rtw89_txwd_body),
 	.h2c_ctrl_reg		= R_AX_H2CREG_CTRL,
+	.h2c_counter_reg	= {R_AX_UDM1 + 1, B_AX_UDM1_HALMAC_H2C_DEQ_CNT_MASK >> 8},
 	.h2c_regs		= rtw8852b_h2c_regs,
 	.c2h_ctrl_reg		= R_AX_C2HREG_CTRL,
+	.c2h_counter_reg	= {R_AX_UDM1 + 1, B_AX_UDM1_HALMAC_C2H_ENQ_CNT_MASK >> 8},
 	.c2h_regs		= rtw8852b_c2h_regs,
 	.page_regs		= &rtw8852b_page_regs,
 	.cfo_src_fd		= true,
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852c.c b/drivers/net/wireless/realtek/rtw89/rtw8852c.c
index 758021287552..a82bee5c8f0a 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852c.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852c.c
@@ -2872,8 +2872,10 @@ const struct rtw89_chip_info rtw8852c_chip_info = {
 	.h2c_desc_size		= sizeof(struct rtw89_rxdesc_short),
 	.txwd_body_size		= sizeof(struct rtw89_txwd_body_v1),
 	.h2c_ctrl_reg		= R_AX_H2CREG_CTRL_V1,
+	.h2c_counter_reg	= {R_AX_UDM1 + 1, B_AX_UDM1_HALMAC_H2C_DEQ_CNT_MASK >> 8},
 	.h2c_regs		= rtw8852c_h2c_regs,
 	.c2h_ctrl_reg		= R_AX_C2HREG_CTRL_V1,
+	.c2h_counter_reg	= {R_AX_UDM1 + 1, B_AX_UDM1_HALMAC_C2H_ENQ_CNT_MASK >> 8},
 	.c2h_regs		= rtw8852c_c2h_regs,
 	.page_regs		= &rtw8852c_page_regs,
 	.cfo_src_fd		= false,