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[v7,0/4] usb: gadget: reduce usb gadget trace event buffer usage

Message ID 20230918112534.2108-1-quic_linyyuan@quicinc.com (mailing list archive)
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Series usb: gadget: reduce usb gadget trace event buffer usage | expand

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Linyu Yuan Sept. 18, 2023, 11:25 a.m. UTC 
some trace event use an integer to save a bit field info of gadget,
also some trace save endpoint name in string forat, it all can be
chagned to other way at trace event store phase.

save one integer member which can parse it for multiple bit field
information.

ep name stringe can be replace to a integer which contaion number
and dir info.

in order to make sure bit field have same bit postion in memory for little
and big endian, define the bit fields differently according host cpu
endian type.

v1: https://lore.kernel.org/linux-usb/20230911042843.2711-1-quic_linyyuan@quicinc.com/
v2: fix two compile issues that COMPILE_TEST not covered
    https://lore.kernel.org/linux-usb/20230911112446.1791-1-quic_linyyuan@quicinc.com/
v3: fix reviewer comments, allow bit fields work on both little and big endian
    https://lore.kernel.org/linux-usb/20230912104455.7737-1-quic_linyyuan@quicinc.com/
v4: add DECLARE_EVENT_CLASS_PRINT_INIT() new trace class and use it
    https://lore.kernel.org/linux-usb/20230914100302.30274-1-quic_linyyuan@quicinc.com/
v5: use cpu_to_le32() at fast assign stage to fix endian issue
    https://lore.kernel.org/linux-usb/20230915051123.26486-1-quic_linyyuan@quicinc.com/
v6: missing three cpu_to_le32() usage in dwc3 trace
    https://lore.kernel.org/linux-usb/20230915052716.28540-1-quic_linyyuan@quicinc.com/
v7: define bit field according cpu endian type, remove wrong cpu_to_le32()
    usage which point by Alan Stern.

Linyu Yuan (4):
  usb: gadget: remove UDC_TRACE_STR_MAX definition
  usb: gadget: add anonymous definition in some struct for trace purpose
  usb: udc: trace: reduce buffer usage of trace event
  usb: dwc3: trace: reduce buffer usage of trace event

 drivers/usb/dwc3/trace.h       |  63 ++++----
 drivers/usb/gadget/udc/trace.h | 114 ++++----------
 include/linux/usb/gadget.h     | 268 +++++++++++++++++++++++++++------
 3 files changed, 285 insertions(+), 160 deletions(-)