hi Paul:
> Please read section 3.2.11 in the xHCI spec, which is freely available on
> the web.
I found what you mean.
I dump "ep context", "ep ring" and "event ring" for handling short package.
Driver prepare ep ring like below
xhci.0: @000000002796e150 279cfb04 00000000 000404fc 80021415 //xxxxxx
xhci.0: @000000002796e160 279d0000 00000000 000006f8 00000625 //normal
xhci.0: @000000002796e170 279d06f8 00000000 00000bf4 80021625
but event ring get below result
xhci.0: @00000000278d1710 2796e150 00000000 0d0004fc 01038001
xhci.0: @00000000278d1720 2796e160 00000000 01000000 01038001
//event for normal
My questions are
1. The xhci controller seems not handle the normal TRB for short package.
as you can see the length of event package for normal package is 0.
am I correct?
2. if above #1 is correct, how xhci controller get the left 0x6f8 data
in original normal package?
the controller did fire iso in token to get 0x4fc bytes, above
marked "xxxx", and if xhci controller didn't firing the left in tokens
to get 0x6f8 bytes, that mean the data we get from iso-in pipe is not
continuous, right?
3. is there any relationship between below patch
https://lkml.org/lkml/2013/6/26/501
appreciate your help,
Endpoint 02 Context:
xhci.0: @e52e90c0 (virt) @27f660c0 (dma) 0x000001 - ep_info
xhci.0: @e52e90c4 (virt) @27f660c4 (dma) 0x3fc0228 - ep_info2
xhci.0: @e52e90c8 (virt) @27f660c8 (dma) 0x2796e001 - deq
xhci.0: @e52e90d0 (virt) @27f660d0 (dma) 0xbf40bf4 - tx_info
xhci.0: @e52e90d4 (virt) @27f660d4 (dma) 0x000000 - rsvd[0]
xhci.0: @e52e90d8 (virt) @27f660d8 (dma) 0x000000 - rsvd[1]
xhci.0: @e52e90dc (virt) @27f660dc (dma) 0x3000000 - rsvd[2]
ep ring
xhci.0: @000000002796e110 279ccb34 00000000 00000bf4 80021625
xhci.0: @000000002796e120 279cd728 00000000 00000bf4 80021625
xhci.0: @000000002796e130 279ce31c 00000000 00000bf4 80021625
xhci.0: @000000002796e140 279cef10 00000000 00000bf4 80021625
xhci.0: @000000002796e150 279cfb04 00000000 000404fc 80021415 //xxxxxx
xhci.0: @000000002796e160 279d0000 00000000 000006f8 00000625 //normal
xhci.0: @000000002796e170 279d06f8 00000000 00000bf4 80021625
event ring:
xhci.0: @00000000278d1700 2796e140 00000000 0d000bf4 01038001
xhci.0: @00000000278d1710 2796e150 00000000 0d0004fc 01038001
xhci.0: @00000000278d1720 2796e160 00000000 01000000 01038001 //event for normal
xhci.0: @00000000278d1730 2796e170 00000000 0d000bf4 01038001
xhci.0: @00000000278d1740 2796e180 00000000 0d000bf4 01038001
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