wifi: rtw89: add to dump TX FIFO 0/1 for 8852C

MAC maintains TX FIFO to transmit packets with meta data to BB layer. To
debug abnormal transmission, we need to dump the content to dig problem.
Since FIFO of 8852C locates on different address with different size and
need additional switch to enable read operation, this patch adds the
changes accordingly.

Signed-off-by: Ping-Ke Shih <[email protected]>
Signed-off-by: Kalle Valo <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: Ping-Ke Shih

drivers/net/wireless/realtek/rtw89/debug.c

@@ -774,13 +774,34 @@ rtw89_debug_priv_mac_mem_dump_get(struct seq_file *m, void *v)
 {
 	struct rtw89_debugfs_priv *debugfs_priv = m->private;
 	struct rtw89_dev *rtwdev = debugfs_priv->rtwdev;
+	bool grant_read = false;
+
+	if (debugfs_priv->mac_mem.sel >= RTW89_MAC_MEM_NUM)
+		return -ENOENT;
+
+	if (rtwdev->chip->chip_id == RTL8852C) {
+		switch (debugfs_priv->mac_mem.sel) {
+		case RTW89_MAC_MEM_TXD_FIFO_0_V1:
+		case RTW89_MAC_MEM_TXD_FIFO_1_V1:
+		case RTW89_MAC_MEM_TXDATA_FIFO_0:
+		case RTW89_MAC_MEM_TXDATA_FIFO_1:
+			grant_read = true;
+			break;
+		default:
+			break;
+		}
+	}
 
 	mutex_lock(&rtwdev->mutex);
 	rtw89_leave_ps_mode(rtwdev);
+	if (grant_read)
+		rtw89_write32_set(rtwdev, R_AX_TCR1, B_AX_TCR_FORCE_READ_TXDFIFO);
 	rtw89_debug_dump_mac_mem(m, rtwdev,
 				 debugfs_priv->mac_mem.sel,
 				 debugfs_priv->mac_mem.start,
 				 debugfs_priv->mac_mem.len);
+	if (grant_read)
+		rtw89_write32_clr(rtwdev, R_AX_TCR1, B_AX_TCR_FORCE_READ_TXDFIFO);
 	mutex_unlock(&rtwdev->mutex);
 
 	return 0;

drivers/net/wireless/realtek/rtw89/mac.c

@@ -31,6 +31,8 @@ const u32 rtw89_mac_mem_base_addrs[RTW89_MAC_MEM_NUM] = {
 	[RTW89_MAC_MEM_TXDATA_FIFO_1]	= TXDATA_FIFO_1_BASE_ADDR,
 	[RTW89_MAC_MEM_CPU_LOCAL]	= CPU_LOCAL_BASE_ADDR,
 	[RTW89_MAC_MEM_BSSID_CAM]	= BSSID_CAM_BASE_ADDR,
+	[RTW89_MAC_MEM_TXD_FIFO_0_V1]	= TXD_FIFO_0_BASE_ADDR_V1,
+	[RTW89_MAC_MEM_TXD_FIFO_1_V1]	= TXD_FIFO_1_BASE_ADDR_V1,
 };
 
 static void rtw89_mac_mem_write(struct rtw89_dev *rtwdev, u32 offset,

drivers/net/wireless/realtek/rtw89/mac.h

@@ -245,6 +245,8 @@ enum rtw89_mac_dbg_port_sel {
 #define	BCN_IE_CAM1_BASE_ADDR		0x188A0000
 #define	TXD_FIFO_0_BASE_ADDR		0x18856200
 #define	TXD_FIFO_1_BASE_ADDR		0x188A1080
+#define	TXD_FIFO_0_BASE_ADDR_V1		0x18856400 /* for 8852C */
+#define	TXD_FIFO_1_BASE_ADDR_V1		0x188A1080 /* for 8852C */
 #define	TXDATA_FIFO_0_BASE_ADDR		0x18856000
 #define	TXDATA_FIFO_1_BASE_ADDR		0x188A1000
 #define	CPU_LOCAL_BASE_ADDR		0x18003000
@@ -271,6 +273,8 @@ enum rtw89_mac_mem_sel {
 	RTW89_MAC_MEM_TXDATA_FIFO_1,
 	RTW89_MAC_MEM_CPU_LOCAL,
 	RTW89_MAC_MEM_BSSID_CAM,
+	RTW89_MAC_MEM_TXD_FIFO_0_V1,
+	RTW89_MAC_MEM_TXD_FIFO_1_V1,
 
 	/* keep last */
 	RTW89_MAC_MEM_NUM,