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dmaengine: fsl-edma: add trace event support

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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@nxp.com>
Link: https://lore.kernel.org/r/20240425205947.3436501-1-Frank.Li@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Frank Li 2024-04-25 16:59:45 -04:00 committed by Vinod Koul
parent 76e43fa6a4
commit 11102d0c34
5 changed files with 178 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/dma/Makefile
View File

@ -31,10 +31,12 @@ obj-$(CONFIG_DW_AXI_DMAC) += dw-axi-dmac/
obj-$(CONFIG_DW_DMAC_CORE) += dw/
obj-$(CONFIG_DW_EDMA) += dw-edma/
obj-$(CONFIG_EP93XX_DMA) += ep93xx_dma.o
fsl-edma-trace-$(CONFIG_TRACING) := fsl-edma-trace.o
CFLAGS_fsl-edma-trace.o := -I$(src)
obj-$(CONFIG_FSL_DMA) += fsldma.o
fsl-edma-objs := fsl-edma-main.o fsl-edma-common.o
fsl-edma-objs := fsl-edma-main.o fsl-edma-common.o ${fsl-edma-trace-y}
obj-$(CONFIG_FSL_EDMA) += fsl-edma.o
mcf-edma-objs := mcf-edma-main.o fsl-edma-common.o
mcf-edma-objs := mcf-edma-main.o fsl-edma-common.o ${fsl-edma-trace-y}
obj-$(CONFIG_MCF_EDMA) += mcf-edma.o
obj-$(CONFIG_FSL_QDMA) += fsl-qdma.o
obj-$(CONFIG_FSL_RAID) += fsl_raid.o

2
drivers/dma/fsl-edma-common.c
View File

@ -540,6 +540,8 @@ void fsl_edma_fill_tcd(struct fsl_edma_chan *fsl_chan,
csr |= EDMA_TCD_CSR_START;
fsl_edma_set_tcd_to_le(fsl_chan, tcd, csr, csr);
trace_edma_fill_tcd(fsl_chan, tcd);
}
static struct fsl_edma_desc *fsl_edma_alloc_desc(struct fsl_edma_chan *fsl_chan,

45
drivers/dma/fsl-edma-common.h
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@ -246,6 +246,11 @@ struct fsl_edma_engine {
struct fsl_edma_chan chans[] __counted_by(n_chans);
};
static inline u32 fsl_edma_drvflags(struct fsl_edma_chan *fsl_chan)
{
return fsl_chan->edma->drvdata->flags;
}
#define edma_read_tcdreg_c(chan, _tcd, __name) \
(sizeof((_tcd)->__name) == sizeof(u64) ? \
edma_readq(chan->edma, &(_tcd)->__name) : \
@ -349,6 +354,9 @@ do { \
fsl_edma_set_tcd_to_le_c((struct fsl_edma_hw_tcd *)_tcd, _val, _field); \
} while (0)
/* 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.
@ -367,23 +375,38 @@ static inline u64 edma_readq(struct fsl_edma_engine *edma, void __iomem *addr)
h = ioread32(addr + 4);
}
trace_edma_readl(edma, addr, l);
trace_edma_readl(edma, addr + 4, h);
return (h << 32) | l;
}
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,
@ -394,6 +417,8 @@ 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,
@ -404,6 +429,8 @@ 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,
@ -413,6 +440,8 @@ 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 void edma_writeq(struct fsl_edma_engine *edma,
@ -425,6 +454,9 @@ static inline void edma_writeq(struct fsl_edma_engine *edma,
iowrite32(val & 0xFFFFFFFF, addr);
iowrite32(val >> 32, addr + 4);
}
trace_edma_writel(edma, addr, val & 0xFFFFFFFF);
trace_edma_writel(edma, addr + 4, val >> 32);
}
static inline struct fsl_edma_chan *to_fsl_edma_chan(struct dma_chan *chan)
@ -432,11 +464,6 @@ static inline struct fsl_edma_chan *to_fsl_edma_chan(struct dma_chan *chan)
return container_of(chan, struct fsl_edma_chan, vchan.chan);
}
static inline u32 fsl_edma_drvflags(struct fsl_edma_chan *fsl_chan)
{
return fsl_chan->edma->drvdata->flags;
}
static inline struct fsl_edma_desc *to_fsl_edma_desc(struct virt_dma_desc *vd)
{
return container_of(vd, struct fsl_edma_desc, vdesc);

4
drivers/dma/fsl-edma-trace.c Normal file
View File

@ -0,0 +1,4 @@
// SPDX-License-Identifier: GPL-2.0
#define CREATE_TRACE_POINTS
#include "fsl-edma-common.h"

132
drivers/dma/fsl-edma-trace.h Normal file
View File

@ -0,0 +1,132 @@
/* 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_chan *chan, void *tcd),
TP_ARGS(chan, tcd),
TP_STRUCT__entry(
__field(u64, saddr)
__field(u16, soff)
__field(u16, attr)
__field(u32, nbytes)
__field(u64, slast)
__field(u64, daddr)
__field(u16, doff)
__field(u16, citer)
__field(u64, dlast_sga)
__field(u16, csr)
__field(u16, biter)
),
TP_fast_assign(
__entry->saddr = fsl_edma_get_tcd_to_cpu(chan, tcd, saddr),
__entry->soff = fsl_edma_get_tcd_to_cpu(chan, tcd, soff),
__entry->attr = fsl_edma_get_tcd_to_cpu(chan, tcd, attr),
__entry->nbytes = fsl_edma_get_tcd_to_cpu(chan, tcd, nbytes),
__entry->slast = fsl_edma_get_tcd_to_cpu(chan, tcd, slast),
__entry->daddr = fsl_edma_get_tcd_to_cpu(chan, tcd, daddr),
__entry->doff = fsl_edma_get_tcd_to_cpu(chan, tcd, doff),
__entry->citer = fsl_edma_get_tcd_to_cpu(chan, tcd, citer),
__entry->dlast_sga = fsl_edma_get_tcd_to_cpu(chan, tcd, dlast_sga),
__entry->csr = fsl_edma_get_tcd_to_cpu(chan, tcd, csr),
__entry->biter = fsl_edma_get_tcd_to_cpu(chan, tcd, biter);
),
TP_printk("\n==== TCD =====\n"
" saddr: 0x%016llx\n"
" soff: 0x%04x\n"
" attr: 0x%04x\n"
" nbytes: 0x%08x\n"
" slast: 0x%016llx\n"
" daddr: 0x%016llx\n"
" doff: 0x%04x\n"
" citer: 0x%04x\n"
" dlast: 0x%016llx\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_chan *chan, void *tcd),
TP_ARGS(chan, 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>