From c2c19821c41f0e20de1cc0c3f6103d338f868198 Mon Sep 17 00:00:00 2001 From: Sam Hurst Date: Fri, 14 Aug 2020 13:05:20 -0700 Subject: TCPMv2: Don't interrupt RX/TX Extended Chunked Msg sequence Delay sending a new message during the reception or transmitting of Chunked messages. BRANCH=none BUG=b:161836223 TEST=make -j buildall manual: Transmitted an extended message and verified that the sequence was not interrupted by attempting to send a VDM message. Without patch Chunked message request that was interrupted. 20-08-14 10:46:13.473 C1: RECV 9a9f/1 [0]00008c00 20-08-14 10:46:13.494 C1: RECV 9c9f/1 [0]00009400 20-08-14 10:46:13.516 C1: RECV 9e9f/1 [0]00009c00 20-08-14 10:46:13.535 C1: RECV 909f/1 [0]0000a400 Try to send VDM. MSG_TYPE is corrupted, was 0x1f, now 0x0f 20-08-14 10:46:13.563 C1: RECV 928f/1 [0]0000ac00 20-08-14 10:46:13.591 C1: RECV 948f/1 [0]0000b400 20-08-14 10:46:13.618 C1: RECV 968f/1 [0]0000bc00 20-08-14 10:46:13.645 C1: RECV 988f/1 [0]0000c400 20-08-14 10:46:13.674 C1: RECV 9a8f/1 [0]0000cc00 With patch. Chunked message request was not interrupted. 20-08-14 10:50:56.052 C1: RECV 9a9f/1 [0]00008c00 20-08-14 10:50:56.075 C1: RECV 9c9f/1 [0]00009400 20-08-14 10:50:56.093 C1: RECV 9e9f/1 [0]00009c00 20-08-14 10:50:56.114 C1: RECV 909f/1 [0]0000a400 Try to send VDM. Message delayed 20-08-14 10:50:56.134 C1: RECV 929f/1 [0]0000ac00 20-08-14 10:50:56.155 C1: RECV 949f/1 [0]0000b400 20-08-14 10:50:56.175 C1: RECV 969f/1 [0]0000bc00 20-08-14 10:50:56.195 C1: RECV 989f/1 [0]0000c400 20-08-14 10:50:56.216 C1: RECV 9a9f/1 [0]0000cc00 20-08-14 10:50:56.242 C1: RECV 0c90/0 Try to send VDM. Signed-off-by: Sam Hurst wq Change-Id: I5475792ee9f272fe4964e27839e55e3409a6a799 Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2357414 --- include/usb_prl_sm.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'include/usb_prl_sm.h') diff --git a/include/usb_prl_sm.h b/include/usb_prl_sm.h index 4f6f86e346..d5d133f250 100644 --- a/include/usb_prl_sm.h +++ b/include/usb_prl_sm.h @@ -21,6 +21,15 @@ */ int prl_is_running(int port); +/** + * Returns true if the Protocol Layer State Machine is in the + * process of transmitting or receiving chunked messages. + * + * @param port USB-C port number + * @return true if sending or receiving a chunked message, else false + */ +bool prl_is_busy(int port); + /** * Sets the debug level for the PRL layer * -- cgit v1.2.1