[PATCH v2 0/2] dmaengine: fsl_edma: add trace and debugfs support

From: Frank Li
Date: Tue Sep 19 2023 - 11:14:58 EST


Change from v1 to v2
Fixed tcd trace issue, data need be saved firstly.

=== Trace ===

echo 1 >/sys/kernel/debug/tracing/tracing_on
echo 1 >/sys/kernel/debug/tracing/events/fsl_edma/enable

Run any dma test
...

cat /sys/kernel/debug/tracing/trace

uart_testapp_11-448 [000] d..1. 69.185019: edma_fill_tcd:
==== TCD =====
saddr: 0x831ee020
soff: 0x8000
attr: 0xffff
nbytes: 0xfba40000
slast: 0x00000000
daddr: 0x8aaa4800
doff: 0x0001
citer: 0x0800
dlast: 0xfba40020
csr: 0x0052
biter: 0x0800

uart_testapp_11-448 [000] d..2. 69.185022: edma_writew: offset 0001803c: value 00000000
uart_testapp_11-448 [000] d..2. 69.185023: edma_writel: offset 00018020: value 4259001c
uart_testapp_11-448 [000] d..2. 69.185024: edma_writel: offset 00018030: value 8aaa4000

=== DebugFS ===

cat /sys/kernel/debug/dmaengine/42000000.dma-controller/42000000.dma-controller-CH00/ch_sbr
0x00208003

Frank Li (2):
dmaengine: fsl-emda: add debugfs support
dmaengine: fsl-edma: add trace event support

drivers/dma/Makefile | 7 +-
drivers/dma/fsl-edma-common.c | 2 +
drivers/dma/fsl-edma-common.h | 37 ++++++++-
drivers/dma/fsl-edma-debugfs.c | 116 ++++++++++++++++++++++++++++
drivers/dma/fsl-edma-main.c | 2 +
drivers/dma/fsl-edma-trace.c | 4 +
drivers/dma/fsl-edma-trace.h | 134 +++++++++++++++++++++++++++++++++
7 files changed, 296 insertions(+), 6 deletions(-)
create mode 100644 drivers/dma/fsl-edma-debugfs.c
create mode 100644 drivers/dma/fsl-edma-trace.c
create mode 100644 drivers/dma/fsl-edma-trace.h

--
2.34.1