Hi Thinh, On 2/24/2022 5:26 PM, Thinh Nguyen wrote: > Hi Wesley, > > Wesley Cheng wrote: >> Hi Thinh, >> >> On 2/22/2022 6:59 PM, Thinh Nguyen wrote: >>> Hi Wesley, >>> > > <snip> > >>> >>> Can you provide a full trace? >>> >> Sorry for doing this, but we didn't have a way to share the file >> directly, so I have to paste the trace below. :/ >> >>> Btw, when you experiment with increasing the timeout to 10 seconds, did >>> you use the mdelay() in each loop? The delta time for End Transfer >>> timeout here seems very small. >>> >> This particular run did not modify the timeout for the cmd status polling. >> >> Is that something that you want to try? Not pertaining to this dequeue >> situation, during the pullup disable path debug, I noticed that as long >> as there was a pending EP0 SETUP packet (not data/status) cached in the >> controller, it would also have endxfer timeouts on non-control EPs. We >> were able to capture a bus sniffer log + ftrace, and it showed that at >> the point of the error, the lecroy/bus log saw a SETUP token ACK'ed, >> while on the ftrace, there were endxfer timeouts for all non-control EPs >> (due to the dwc3_gadget_stop_active_transfers() call) >> >> Thanks >> Wesley >> >> TRACE >> --------------------------------------------------------------------- >> > > <snip> > >> [ 1023.912550050 0x4af666fd2] dbg_trace_log_ctrl: Clear Endpoint >> Feature(Halt ep4in) >> [ 1023.912934738 0x4af668cab] dbg_send_ep_cmd: ep0out: cmd 'Set >> Stall' [404] params 00000000 00000000 00000000 --> status: Successful >> [ 1023.913361561 0x4af66acae] dbg_send_ep_cmd: ep0out: cmd >> 'Start Transfer' [406] params 00000000 efffa000 00000000 --> status: >> Successful >> [ 1024.336480573 0x4afe2a29b] dbg_trace_log_ctrl: Clear Endpoint >> Feature(Halt ep5in) >> [ 1024.336855573 0x4afe2bebc] dbg_send_ep_cmd: ep5in: cmd 'Clear >> Stall' [405] params 00000000 00000000 00000000 --> status: Successful >> [ 1024.337264531 0x4afe2dd68] dbg_send_ep_cmd: ep0in: cmd 'Start >> Transfer' [406] params 00000000 efffa000 00000000 --> status: Successful >> [ 1024.351910156 0x4afe727d4] dbg_send_ep_cmd: ep0out: cmd >> 'Start Transfer' [406] params 00000000 efffa000 00000000 --> status: >> Successful >> [ 1024.363139896 0x4afea720f] dbg_trace_log_ctrl: Clear Endpoint >> Feature(Halt ep4in) >> [ 1024.363898281 0x4afeaaaf0] dbg_send_ep_cmd: ep0out: cmd 'Set >> Stall' [404] params 00000000 00000000 00000000 --> status: Successful >> [ 1024.364734010 0x4afeae99e] dbg_send_ep_cmd: ep0out: cmd >> 'Start Transfer' [406] params 00000000 efffa000 00000000 --> status: >> Successful >> [ 1024.776173803 0x4b063739a] dbg_trace_log_ctrl: Clear Endpoint >> Feature(Halt ep5in) >> [ 1024.776907188 0x4b063aa9b] dbg_send_ep_cmd: ep5in: cmd 'Clear >> Stall' [405] params 00000000 00000000 00000000 --> status: Successful >> [ 1024.777646147 0x4b063e208] dbg_send_ep_cmd: ep0in: cmd 'Start >> Transfer' [406] params 00000000 efffa000 00000000 --> status: Successful >> [ 1024.788641980 0x4b0671ab8] dbg_send_ep_cmd: ep0out: cmd >> 'Start Transfer' [406] params 00000000 efffa000 00000000 --> status: >> Successful >> [ 1024.799682397 0x4b06a56bf] dbg_trace_log_ctrl: Clear Endpoint >> Feature(Halt ep4in) >> [ 1024.800442605 0x4b06a8fc3] dbg_send_ep_cmd: ep0out: cmd 'Set >> Stall' [404] params 00000000 00000000 00000000 --> status: Successful >> [ 1024.801184584 0x4b06ac769] dbg_send_ep_cmd: ep0out: cmd >> 'Start Transfer' [406] params 00000000 efffa000 00000000 --> status: >> Successful >> [ 1025.222173752 0x4b0e61d99] dbg_trace_log_ctrl: Clear Endpoint >> Feature(Halt ep5in) >> [ 1025.222991669 0x4b0e65af1] dbg_send_ep_cmd: ep5in: cmd 'Clear >> Stall' [405] params 00000000 00000000 00000000 --> status: Successful >> [ 1025.223850731 0x4b0e69b5f] dbg_send_ep_cmd: ep0in: cmd 'Start >> Transfer' [406] params 00000000 efffa000 00000000 --> status: Successful >> [ 1025.239023492 0x4b0eb0d54] dbg_send_ep_cmd: ep0out: cmd >> 'Start Transfer' [406] params 00000000 efffa000 00000000 --> status: >> Successful >> [ 1025.248963179 0x4b0edf6ce] dbg_trace_log_ctrl: Clear Endpoint >> Feature(Halt ep4in) >> [ 1025.249709846 0x4b0ee2ecd] dbg_send_ep_cmd: ep0out: cmd 'Set >> Stall' [404] params 00000000 00000000 00000000 --> status: Successful >> [ 1025.250533440 0x4b0ee6c93] dbg_send_ep_cmd: ep0out: cmd >> 'Start Transfer' [406] params 00000000 efffa000 00000000 --> status: >> Successful >> [ 1025.667084535 0x4b16875e7] dbg_trace_log_ctrl: Clear Endpoint >> Feature(Halt ep5in) >> [ 1025.667827764 0x4b168ada6] dbg_send_ep_cmd: ep5in: cmd 'Clear >> Stall' [405] params 00000000 00000000 00000000 --> status: Successful >> [ 1025.668635993 0x4b168ea44] dbg_send_ep_cmd: ep0in: cmd 'Start >> Transfer' [406] params 00000000 efffa000 00000000 --> status: Successful >> [ 1025.674777764 0x4b16ab6e7] dbg_send_ep_cmd: ep0out: cmd >> 'Start Transfer' [406] params 00000000 efffa000 00000000 --> status: >> Successful >> [ 1025.684733597 0x4b16da197] dbg_trace_log_ctrl: Clear Endpoint >> Feature(Halt ep4in) >> [ 1025.685336150 0x4b16dcec7] dbg_send_ep_cmd: ep0out: cmd 'Set >> Stall' [404] params 00000000 00000000 00000000 --> status: Successful >> [ 1025.686112608 0x4b16e0904] dbg_send_ep_cmd: ep0out: cmd >> 'Start Transfer' [406] params 00000000 efffa000 00000000 --> status: >> Successful >> [ 1025.698842347 0x4b171c3bf] dbg_send_ep_cmd: ep0out: cmd 'Set >> Stall' [404] params 00000000 00000000 00000000 --> status: Successful >> [ 1026.444051569 0x4b24c1670] dbg_send_ep_cmd: ep0out: cmd >> 'Start Transfer' [406] params 00000000 efffa000 00000000 --> status: No >> Resource > > Why did this fail with No Resource? Was it sent before the control TRB > completion? > >> [ 1027.225705425 0x4b3311678] dbg_trace_log_ctrl: Clear Endpoint >> Feature(Halt ep5in) >> [ 1027.225820165 0x4b3311f14] dbg_send_ep_cmd: ep5in: cmd 'Clear >> Stall' [405] params 00000000 00000000 00000000 --> status: Successful >> [ 1027.225931467 0x4b331276c] dbg_send_ep_cmd: ep0in: cmd 'Start >> Transfer' [406] params 00000000 efffa000 00000000 --> status: Successful >> [ 1027.234311467 0x4b3339bed] dbg_ep_dequeue: ep7in: req >> ffffff87f99b8f00 length 0/61696 zsI ==> -115 >> [ 1027.247409123 0x4b337723f] dbg_send_ep_cmd: ep7in: cmd 'End >> Transfer' [f0d08] params 00000000 00000000 00000000 --> status: Timed Out >> > > If the Start Transfer for ep0 failed and the Setup packet can't be > DMA'ed out, the End Transfer may not go through. > > Can you leave the log unfiltered and is it possible to send as > attachment? It's missing some important info in this log. > Are there any specific logs you were looking for? trace_dwc3_event trace_dwc3_prepare_trb Part of reproducing this issue will not allow me to enable tracing, so I have to make changes in our driver to reroute the logs elsewhere. So far I've added changes to do: trace_dwc3_ctrl_req trace_dwc3_ep_queue trace_dwc3_ep_dequeue trace_dwc3_gadget_giveback trace_dwc3_gadget_ep_cmd I can add the above 2 tracepoints as well, but wondering if you needed anything else. Thanks Wesley Cheng -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
