mt76: mt7615: add tracing support

Introduce token tracing support in mt7615_mac_tx_free routine

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/Makefile b/drivers/net/wireless/mediatek/mt76/mt7615/Makefile
index 5aaac69..dcd6b0e 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mt7615/Makefile
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/Makefile
@@ -2,5 +2,7 @@
 
 obj-$(CONFIG_MT7615E) += mt7615e.o
 
+CFLAGS_trace.o := -I$(src)
+
 mt7615e-y := pci.o init.o dma.o eeprom.o main.o mcu.o mac.o \
-            debugfs.o
+            debugfs.o trace.o

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
index de80e8c..16233ce 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
@@ -12,6 +12,7 @@
 #include "mt7615.h"
 #include "../trace.h"
 #include "../dma.h"
+#include "mt7615_trace.h"
 #include "mac.h"
 
 #define to_rssi(field, rxv)            ((FIELD_GET(field, rxv) - 220) / 2)
@@ -1300,13 +1301,17 @@ void mt7615_mac_tx_free(struct mt7615_dev *dev, struct sk_buff *skb)
 
        count = FIELD_GET(MT_TX_FREE_MSDU_ID_CNT, le16_to_cpu(free->ctrl));
        for (i = 0; i < count; i++) {
+               u16 token = le16_to_cpu(free->token[i]);
+
                spin_lock_bh(&dev->token_lock);
-               txwi = idr_remove(&dev->token, le16_to_cpu(free->token[i]));
+               txwi = idr_remove(&dev->token, token);
                spin_unlock_bh(&dev->token_lock);
 
                if (!txwi)
                        continue;
 
+               trace_mac_tx_free(dev, token);
+
                mt7615_txp_skb_unmap(mdev, txwi);
                if (txwi->skb) {
                        mt76_tx_complete_skb(mdev, txwi->skb);

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mt7615_trace.h b/drivers/net/wireless/mediatek/mt76/mt7615/mt7615_trace.h
new file mode 100644 (file)
index 0000000..d3eb49d
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mt7615_trace.h
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: ISC */
+/*
+ * Copyright (C) 2019 Lorenzo Bianconi <lorenzo@kernel.org>
+ */
+
+#if !defined(__MT7615_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define __MT7615_TRACE_H
+
+#include <linux/tracepoint.h>
+#include "mt7615.h"
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM mt7615
+
+#define MAXNAME                32
+#define DEV_ENTRY      __array(char, wiphy_name, 32)
+#define DEV_ASSIGN     strlcpy(__entry->wiphy_name,    \
+                               wiphy_name(mt76_hw(dev)->wiphy), MAXNAME)
+#define DEV_PR_FMT     "%s"
+#define DEV_PR_ARG     __entry->wiphy_name
+
+#define TOKEN_ENTRY    __field(u16, token)
+#define TOKEN_ASSIGN   __entry->token = token
+#define TOKEN_PR_FMT   " %d"
+#define TOKEN_PR_ARG   __entry->token
+
+DECLARE_EVENT_CLASS(dev_token,
+       TP_PROTO(struct mt7615_dev *dev, u16 token),
+       TP_ARGS(dev, token),
+       TP_STRUCT__entry(
+               DEV_ENTRY
+               TOKEN_ENTRY
+       ),
+       TP_fast_assign(
+               DEV_ASSIGN;
+               TOKEN_ASSIGN;
+       ),
+       TP_printk(
+               DEV_PR_FMT TOKEN_PR_FMT,
+               DEV_PR_ARG, TOKEN_PR_ARG
+       )
+);
+
+DEFINE_EVENT(dev_token, mac_tx_free,
+       TP_PROTO(struct mt7615_dev *dev, u16 token),
+       TP_ARGS(dev, token)
+);
+
+#endif
+
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE mt7615_trace
+
+#include <trace/define_trace.h>

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/trace.c b/drivers/net/wireless/mediatek/mt76/mt7615/trace.c
new file mode 100644 (file)
index 0000000..6c02d5a
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/trace.c
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: ISC
+/*
+ * Copyright (C) 2019 Lorenzo Bianconi <lorenzo@kernel.org>
+ */
+
+#include <linux/module.h>
+
+#ifndef __CHECKER__
+#define CREATE_TRACE_POINTS
+#include "mt7615_trace.h"
+
+#endif