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Message-Id: <20230920201852.3170104-4-Frank.Li@nxp.com>
Date: Wed, 20 Sep 2023 16:18:52 -0400
From: Frank Li <Frank.Li@....com>
To: lkp@...el.com, gregkh@...uxfoundation.org, rafael@...nel.org
Cc: Frank.Li@....com, dmaengine@...r.kernel.org, imx@...ts.linux.dev,
linux-kernel@...r.kernel.org, oe-kbuild-all@...ts.linux.dev,
vkoul@...nel.org
Subject: [PATCH v3 3/3] dmaengine: fsl-edma: add trace event support
Implement trace event support to enhance logging functionality for
register access and the transfer control descriptor (TCD) context.
This will enable more comprehensive monitoring and analysis of system
activities
Signed-off-by: Frank Li <Frank.Li@....com>
---
drivers/dma/Makefile | 6 +-
drivers/dma/fsl-edma-common.c | 2 +
drivers/dma/fsl-edma-common.h | 29 +++++++-
drivers/dma/fsl-edma-trace.c | 4 +
drivers/dma/fsl-edma-trace.h | 134 ++++++++++++++++++++++++++++++++++
5 files changed, 169 insertions(+), 6 deletions(-)
create mode 100644 drivers/dma/fsl-edma-trace.c
create mode 100644 drivers/dma/fsl-edma-trace.h
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index a51c6397bcad0..40b2dd554e5dc 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -32,10 +32,12 @@ obj-$(CONFIG_DW_DMAC_CORE) += dw/
obj-$(CONFIG_DW_EDMA) += dw-edma/
obj-$(CONFIG_EP93XX_DMA) += ep93xx_dma.o
fsl-edma-debugfs-$(CONFIG_DEBUG_FS) := fsl-edma-debugfs.o
+CFLAGS_fsl-edma-trace.o := -I$(src)
+fsl-edma-trace-$(CONFIG_TRACING) := fsl-edma-trace.o
obj-$(CONFIG_FSL_DMA) += fsldma.o
-fsl-edma-objs := fsl-edma-main.o fsl-edma-common.o $(fsl-edma-debugfs-y)
+fsl-edma-objs := fsl-edma-main.o fsl-edma-common.o $(fsl-edma-debugfs-y) ${fsl-edma-trace-y}
obj-$(CONFIG_FSL_EDMA) += fsl-edma.o
-mcf-edma-objs := mcf-edma-main.o fsl-edma-common.o $(fsl-edma-debugfs-y)
+mcf-edma-objs := mcf-edma-main.o fsl-edma-common.o $(fsl-edma-debugfs-y) ${fsl-edma-trace-y}
obj-$(CONFIG_MCF_EDMA) += mcf-edma.o
obj-$(CONFIG_FSL_QDMA) += fsl-qdma.o
obj-$(CONFIG_FSL_RAID) += fsl_raid.o
diff --git a/drivers/dma/fsl-edma-common.c b/drivers/dma/fsl-edma-common.c
index a0f5741abcc47..0182e2695fdc0 100644
--- a/drivers/dma/fsl-edma-common.c
+++ b/drivers/dma/fsl-edma-common.c
@@ -521,6 +521,8 @@ void fsl_edma_fill_tcd(struct fsl_edma_chan *fsl_chan,
csr |= EDMA_TCD_CSR_START;
tcd->csr = cpu_to_le16(csr);
+
+ trace_edma_fill_tcd(fsl_chan->edma, tcd);
}
static struct fsl_edma_desc *fsl_edma_alloc_desc(struct fsl_edma_chan *fsl_chan,
diff --git a/drivers/dma/fsl-edma-common.h b/drivers/dma/fsl-edma-common.h
index ecaba563d4897..a9e27110ac7d7 100644
--- a/drivers/dma/fsl-edma-common.h
+++ b/drivers/dma/fsl-edma-common.h
@@ -234,6 +234,9 @@ struct fsl_edma_engine {
edma_writel(chan->edma, val, \
(void __iomem *)&(container_of(chan->tcd, struct fsl_edma3_ch_reg, tcd)->__name))
+/* Need after struct defination */
+#include "fsl-edma-trace.h"
+
/*
* R/W functions for big- or little-endian registers:
* The eDMA controller's endian is independent of the CPU core's endian.
@@ -242,18 +245,30 @@ struct fsl_edma_engine {
*/
static inline u32 edma_readl(struct fsl_edma_engine *edma, void __iomem *addr)
{
+ u32 val;
+
if (edma->big_endian)
- return ioread32be(addr);
+ val = ioread32be(addr);
else
- return ioread32(addr);
+ val = ioread32(addr);
+
+ trace_edma_readl(edma, addr, val);
+
+ return val;
}
static inline u16 edma_readw(struct fsl_edma_engine *edma, void __iomem *addr)
{
+ u16 val;
+
if (edma->big_endian)
- return ioread16be(addr);
+ val = ioread16be(addr);
else
- return ioread16(addr);
+ val = ioread16(addr);
+
+ trace_edma_readw(edma, addr, val);
+
+ return val;
}
static inline void edma_writeb(struct fsl_edma_engine *edma,
@@ -264,6 +279,8 @@ static inline void edma_writeb(struct fsl_edma_engine *edma,
iowrite8(val, (void __iomem *)((unsigned long)addr ^ 0x3));
else
iowrite8(val, addr);
+
+ trace_edma_writeb(edma, addr, val);
}
static inline void edma_writew(struct fsl_edma_engine *edma,
@@ -274,6 +291,8 @@ static inline void edma_writew(struct fsl_edma_engine *edma,
iowrite16be(val, (void __iomem *)((unsigned long)addr ^ 0x2));
else
iowrite16(val, addr);
+
+ trace_edma_writew(edma, addr, val);
}
static inline void edma_writel(struct fsl_edma_engine *edma,
@@ -283,6 +302,8 @@ static inline void edma_writel(struct fsl_edma_engine *edma,
iowrite32be(val, addr);
else
iowrite32(val, addr);
+
+ trace_edma_writel(edma, addr, val);
}
static inline struct fsl_edma_chan *to_fsl_edma_chan(struct dma_chan *chan)
diff --git a/drivers/dma/fsl-edma-trace.c b/drivers/dma/fsl-edma-trace.c
new file mode 100644
index 0000000000000..28300ad80bb75
--- /dev/null
+++ b/drivers/dma/fsl-edma-trace.c
@@ -0,0 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#define CREATE_TRACE_POINTS
+#include "fsl-edma-common.h"
diff --git a/drivers/dma/fsl-edma-trace.h b/drivers/dma/fsl-edma-trace.h
new file mode 100644
index 0000000000000..9dd08a42ad54a
--- /dev/null
+++ b/drivers/dma/fsl-edma-trace.h
@@ -0,0 +1,134 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2023 NXP.
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM fsl_edma
+
+#if !defined(__LINUX_FSL_EDMA_TRACE) || defined(TRACE_HEADER_MULTI_READ)
+#define __LINUX_FSL_EDMA_TRACE
+
+#include <linux/types.h>
+#include <linux/tracepoint.h>
+
+DECLARE_EVENT_CLASS(edma_log_io,
+ TP_PROTO(struct fsl_edma_engine *edma, void __iomem *addr, u32 value),
+ TP_ARGS(edma, addr, value),
+ TP_STRUCT__entry(
+ __field(struct fsl_edma_engine *, edma)
+ __field(void __iomem *, addr)
+ __field(u32, value)
+ ),
+ TP_fast_assign(
+ __entry->edma = edma;
+ __entry->addr = addr;
+ __entry->value = value;
+ ),
+ TP_printk("offset %08x: value %08x",
+ (u32)(__entry->addr - __entry->edma->membase), __entry->value)
+);
+
+DEFINE_EVENT(edma_log_io, edma_readl,
+ TP_PROTO(struct fsl_edma_engine *edma, void __iomem *addr, u32 value),
+ TP_ARGS(edma, addr, value)
+);
+
+DEFINE_EVENT(edma_log_io, edma_writel,
+ TP_PROTO(struct fsl_edma_engine *edma, void __iomem *addr, u32 value),
+ TP_ARGS(edma, addr, value)
+);
+
+DEFINE_EVENT(edma_log_io, edma_readw,
+ TP_PROTO(struct fsl_edma_engine *edma, void __iomem *addr, u32 value),
+ TP_ARGS(edma, addr, value)
+);
+
+DEFINE_EVENT(edma_log_io, edma_writew,
+ TP_PROTO(struct fsl_edma_engine *edma, void __iomem *addr, u32 value),
+ TP_ARGS(edma, addr, value)
+);
+
+DEFINE_EVENT(edma_log_io, edma_readb,
+ TP_PROTO(struct fsl_edma_engine *edma, void __iomem *addr, u32 value),
+ TP_ARGS(edma, addr, value)
+);
+
+DEFINE_EVENT(edma_log_io, edma_writeb,
+ TP_PROTO(struct fsl_edma_engine *edma, void __iomem *addr, u32 value),
+ TP_ARGS(edma, addr, value)
+);
+
+DECLARE_EVENT_CLASS(edma_log_tcd,
+ TP_PROTO(struct fsl_edma_engine *edma, struct fsl_edma_hw_tcd *tcd),
+ TP_ARGS(edma, tcd),
+ TP_STRUCT__entry(
+ __field(struct fsl_edma_engine *, edma)
+ __field(u32, saddr)
+ __field(u16, soff)
+ __field(u16, attr)
+ __field(u32, nbytes)
+ __field(u32, slast)
+ __field(u32, daddr)
+ __field(u16, doff)
+ __field(u16, citer)
+ __field(u32, dlast_sga)
+ __field(u16, csr)
+ __field(u16, biter)
+
+ ),
+ TP_fast_assign(
+ __entry->edma = edma;
+ __entry->saddr = le32_to_cpu(tcd->saddr),
+ __entry->soff = le16_to_cpu(tcd->soff),
+ __entry->attr = le16_to_cpu(tcd->attr),
+ __entry->nbytes = le32_to_cpu(tcd->nbytes),
+ __entry->slast = le32_to_cpu(tcd->slast),
+ __entry->daddr = le32_to_cpu(tcd->daddr),
+ __entry->doff = le16_to_cpu(tcd->doff),
+ __entry->citer = le16_to_cpu(tcd->citer),
+ __entry->dlast_sga = le32_to_cpu(tcd->dlast_sga),
+ __entry->csr = le16_to_cpu(tcd->csr),
+ __entry->biter = le16_to_cpu(tcd->biter);
+ ),
+ TP_printk("\n==== TCD =====\n"
+ " saddr: 0x%08x\n"
+ " soff: 0x%04x\n"
+ " attr: 0x%04x\n"
+ " nbytes: 0x%08x\n"
+ " slast: 0x%08x\n"
+ " daddr: 0x%08x\n"
+ " doff: 0x%04x\n"
+ " citer: 0x%04x\n"
+ " dlast: 0x%08x\n"
+ " csr: 0x%04x\n"
+ " biter: 0x%04x\n",
+ __entry->saddr,
+ __entry->soff,
+ __entry->attr,
+ __entry->nbytes,
+ __entry->slast,
+ __entry->daddr,
+ __entry->doff,
+ __entry->citer,
+ __entry->dlast_sga,
+ __entry->csr,
+ __entry->biter)
+);
+
+DEFINE_EVENT(edma_log_tcd, edma_fill_tcd,
+ TP_PROTO(struct fsl_edma_engine *edma, struct fsl_edma_hw_tcd *tcd),
+ TP_ARGS(edma, tcd)
+);
+
+#endif
+
+/* this part must be outside header guard */
+
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE fsl-edma-trace
+
+#include <trace/define_trace.h>
--
2.34.1
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