net: thunderbolt: Add tracepoints (f7586527) · Commits · EulixOS / Software / Kernel

drivers/net/thunderbolt/Makefile

+4 −1

Original line number	Diff line number	Diff line
		# SPDX-License-Identifier: GPL-2.0
		obj-$(CONFIG_USB4_NET) := thunderbolt_net.o
		thunderbolt_net-objs := main.o
		thunderbolt_net-objs := main.o trace.o

		# Tracepoints need to know where to find trace.h
		CFLAGS_trace.o := -I$(src)

drivers/net/thunderbolt/main.c

+21 −0

Original line number	Diff line number	Diff line
		@@ -23,6 +23,8 @@

		#include <net/ip6_checksum.h>

		#include "trace.h"

		/* Protocol timeouts in ms */
		#define TBNET_LOGIN_DELAY 4500
		#define TBNET_LOGIN_TIMEOUT 500
		@@ -353,6 +355,8 @@ static void tbnet_free_buffers(struct tbnet_ring *ring)
		size = TBNET_RX_PAGE_SIZE;
		}

		trace_tbnet_free_frame(i, tf->page, tf->frame.buffer_phy, dir);

		if (tf->frame.buffer_phy)
		dma_unmap_page(dma_dev, tf->frame.buffer_phy, size,
		dir);
		@@ -526,6 +530,9 @@ static int tbnet_alloc_rx_buffers(struct tbnet *net, unsigned int nbuffers)
		tf->frame.buffer_phy = dma_addr;
		tf->dev = net->dev;

		trace_tbnet_alloc_rx_frame(index, tf->page, dma_addr,
		DMA_FROM_DEVICE);

		tb_ring_rx(ring->ring, &tf->frame);

		ring->prod++;
		@@ -602,6 +609,8 @@ static int tbnet_alloc_tx_buffers(struct tbnet *net)
		tf->frame.callback = tbnet_tx_callback;
		tf->frame.sof = TBIP_PDF_FRAME_START;
		tf->frame.eof = TBIP_PDF_FRAME_END;

		trace_tbnet_alloc_tx_frame(i, tf->page, dma_addr, DMA_TO_DEVICE);
		}

		ring->cons = 0;
		@@ -832,12 +841,16 @@ static int tbnet_poll(struct napi_struct *napi, int budget)

		hdr = page_address(page);
		if (!tbnet_check_frame(net, tf, hdr)) {
		trace_tbnet_invalid_rx_ip_frame(hdr->frame_size,
		hdr->frame_id, hdr->frame_index, hdr->frame_count);
		__free_pages(page, TBNET_RX_PAGE_ORDER);
		dev_kfree_skb_any(net->skb);
		net->skb = NULL;
		continue;
		}

		trace_tbnet_rx_ip_frame(hdr->frame_size, hdr->frame_id,
		hdr->frame_index, hdr->frame_count);
		frame_size = le32_to_cpu(hdr->frame_size);

		skb = net->skb;
		@@ -871,6 +884,7 @@ static int tbnet_poll(struct napi_struct *napi, int budget)

		if (last) {
		skb->protocol = eth_type_trans(skb, net->dev);
		trace_tbnet_rx_skb(skb);
		napi_gro_receive(&net->napi, skb);
		net->skb = NULL;
		}
		@@ -990,6 +1004,8 @@ static bool tbnet_xmit_csum_and_map(struct tbnet net, struct sk_buff skb,
		for (i = 0; i < frame_count; i++) {
		hdr = page_address(frames[i]->page);
		hdr->frame_count = cpu_to_le32(frame_count);
		trace_tbnet_tx_ip_frame(hdr->frame_size, hdr->frame_id,
		hdr->frame_index, hdr->frame_count);
		dma_sync_single_for_device(dma_dev,
		frames[i]->frame.buffer_phy,
		tbnet_frame_size(frames[i]), DMA_TO_DEVICE);
		@@ -1054,6 +1070,8 @@ static bool tbnet_xmit_csum_and_map(struct tbnet net, struct sk_buff skb,
		len = le32_to_cpu(hdr->frame_size) - offset;
		wsum = csum_partial(dest, len, wsum);
		hdr->frame_count = cpu_to_le32(frame_count);
		trace_tbnet_tx_ip_frame(hdr->frame_size, hdr->frame_id,
		hdr->frame_index, hdr->frame_count);

		offset = 0;
		}
		@@ -1096,6 +1114,8 @@ static netdev_tx_t tbnet_start_xmit(struct sk_buff *skb,
		bool unmap = false;
		void *dest;

		trace_tbnet_tx_skb(skb);

		nframes = DIV_ROUND_UP(data_len, TBNET_MAX_PAYLOAD_SIZE);
		if (tbnet_available_buffers(&net->tx_ring) < nframes) {
		netif_stop_queue(net->dev);
		@@ -1202,6 +1222,7 @@ static netdev_tx_t tbnet_start_xmit(struct sk_buff *skb,
		net->stats.tx_packets++;
		net->stats.tx_bytes += skb->len;

		trace_tbnet_consume_skb(skb);
		dev_consume_skb_any(skb);

		return NETDEV_TX_OK;

drivers/net/thunderbolt/trace.c

0 → 100644

+10 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0
		/*
		* Tracepoints for Thunderbolt/USB4 networking driver
		*
		* Copyright (C) 2023, Intel Corporation
		* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
		*/

		#define CREATE_TRACE_POINTS
		#include "trace.h"

drivers/net/thunderbolt/trace.h

0 → 100644

+141 −0

Original line number	Diff line number	Diff line
		/* SPDX-License-Identifier: GPL-2.0 */
		/*
		* Tracepoints for Thunderbolt/USB4 networking driver
		*
		* Copyright (C) 2023, Intel Corporation
		* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
		*/

		#undef TRACE_SYSTEM
		#define TRACE_SYSTEM thunderbolt_net

		#if !defined(__TRACE_THUNDERBOLT_NET_H) \|\| defined(TRACE_HEADER_MULTI_READ)
		#define __TRACE_THUNDERBOLT_NET_H

		#include <linux/dma-direction.h>
		#include <linux/skbuff.h>
		#include <linux/tracepoint.h>

		#define DMA_DATA_DIRECTION_NAMES \
		{ DMA_BIDIRECTIONAL, "DMA_BIDIRECTIONAL" }, \
		{ DMA_TO_DEVICE, "DMA_TO_DEVICE" }, \
		{ DMA_FROM_DEVICE, "DMA_FROM_DEVICE" }, \
		{ DMA_NONE, "DMA_NONE" }

		DECLARE_EVENT_CLASS(tbnet_frame,
		TP_PROTO(unsigned int index, const void *page, dma_addr_t phys,
		enum dma_data_direction dir),
		TP_ARGS(index, page, phys, dir),
		TP_STRUCT__entry(
		__field(unsigned int, index)
		__field(const void *, page)
		__field(dma_addr_t, phys)
		__field(enum dma_data_direction, dir)
		),
		TP_fast_assign(
		__entry->index = index;
		__entry->page = page;
		__entry->phys = phys;
		__entry->dir = dir;
		),
		TP_printk("index=%u page=%p phys=%pad dir=%s",
		__entry->index, __entry->page, &__entry->phys,
		__print_symbolic(__entry->dir, DMA_DATA_DIRECTION_NAMES))
		);

		DEFINE_EVENT(tbnet_frame, tbnet_alloc_rx_frame,
		TP_PROTO(unsigned int index, const void *page, dma_addr_t phys,
		enum dma_data_direction dir),
		TP_ARGS(index, page, phys, dir)
		);

		DEFINE_EVENT(tbnet_frame, tbnet_alloc_tx_frame,
		TP_PROTO(unsigned int index, const void *page, dma_addr_t phys,
		enum dma_data_direction dir),
		TP_ARGS(index, page, phys, dir)
		);

		DEFINE_EVENT(tbnet_frame, tbnet_free_frame,
		TP_PROTO(unsigned int index, const void *page, dma_addr_t phys,
		enum dma_data_direction dir),
		TP_ARGS(index, page, phys, dir)
		);

		DECLARE_EVENT_CLASS(tbnet_ip_frame,
		TP_PROTO(__le32 size, __le16 id, __le16 index, __le32 count),
		TP_ARGS(size, id, index, count),
		TP_STRUCT__entry(
		__field(u32, size)
		__field(u16, id)
		__field(u16, index)
		__field(u32, count)
		),
		TP_fast_assign(
		__entry->size = le32_to_cpu(size);
		__entry->id = le16_to_cpu(id);
		__entry->index = le16_to_cpu(index);
		__entry->count = le32_to_cpu(count);
		),
		TP_printk("id=%u size=%u index=%u count=%u",
		__entry->id, __entry->size, __entry->index, __entry->count)
		);

		DEFINE_EVENT(tbnet_ip_frame, tbnet_rx_ip_frame,
		TP_PROTO(__le32 size, __le16 id, __le16 index, __le32 count),
		TP_ARGS(size, id, index, count)
		);

		DEFINE_EVENT(tbnet_ip_frame, tbnet_invalid_rx_ip_frame,
		TP_PROTO(__le32 size, __le16 id, __le16 index, __le32 count),
		TP_ARGS(size, id, index, count)
		);

		DEFINE_EVENT(tbnet_ip_frame, tbnet_tx_ip_frame,
		TP_PROTO(__le32 size, __le16 id, __le16 index, __le32 count),
		TP_ARGS(size, id, index, count)
		);

		DECLARE_EVENT_CLASS(tbnet_skb,
		TP_PROTO(const struct sk_buff *skb),
		TP_ARGS(skb),
		TP_STRUCT__entry(
		__field(const void *, addr)
		__field(unsigned int, len)
		__field(unsigned int, data_len)
		__field(unsigned int, nr_frags)
		),
		TP_fast_assign(
		__entry->addr = skb;
		__entry->len = skb->len;
		__entry->data_len = skb->data_len;
		__entry->nr_frags = skb_shinfo(skb)->nr_frags;
		),
		TP_printk("skb=%p len=%u data_len=%u nr_frags=%u",
		__entry->addr, __entry->len, __entry->data_len,
		__entry->nr_frags)
		);

		DEFINE_EVENT(tbnet_skb, tbnet_rx_skb,
		TP_PROTO(const struct sk_buff *skb),
		TP_ARGS(skb)
		);

		DEFINE_EVENT(tbnet_skb, tbnet_tx_skb,
		TP_PROTO(const struct sk_buff *skb),
		TP_ARGS(skb)
		);

		DEFINE_EVENT(tbnet_skb, tbnet_consume_skb,
		TP_PROTO(const struct sk_buff *skb),
		TP_ARGS(skb)
		);

		#endif /* _TRACE_THUNDERBOLT_NET_H */

		#undef TRACE_INCLUDE_PATH
		#define TRACE_INCLUDE_PATH .

		#undef TRACE_INCLUDE_FILE
		#define TRACE_INCLUDE_FILE trace

		#include <trace/define_trace.h>