net: wwan: iosm: device trace collection using relayfs

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This patch brings in support for device trace collection.
It implements relayfs interface for pushing device trace
from kernel space to user space.

Driver gets the debugfs base directory associated to WWAN
Device and creates trace_control and trace debugfs for
device tracing. Both trace_control & trace debugfs are
created under /sys/kernel/debug/wwan/wwan0/.

In order to collect device trace on trace0 interface, user
need to write 1 to trace_ctl interface.

Signed-off-by: M Chetan Kumar <m.chetan.kumar@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

M Chetan Kumar 2021-11-20 21:51:55 +05:30 • committed by David S. Miller

parent c480467002

commit 00ef32565b

8 changed files with 271 additions and 13 deletions

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3

drivers/net/wwan/iosm/Makefile

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13

drivers/net/wwan/iosm/iosm_ipc_imem.c

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2

drivers/net/wwan/iosm/iosm_ipc_imem.h

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31

drivers/net/wwan/iosm/iosm_ipc_imem_ops.c

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9

drivers/net/wwan/iosm/iosm_ipc_imem_ops.h

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2

drivers/net/wwan/iosm/iosm_ipc_port.c

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173

drivers/net/wwan/iosm/iosm_ipc_trace.c

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51

drivers/net/wwan/iosm/iosm_ipc_trace.h

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