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USB: Make "buffer error" reporting consistent.

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This error means that the controller failed to read or write data
to/from system memory fast enough. As a result, we should report it
as READ_ERROR/WRITE_ERROR, rather than something that sounds like
an error with the device itself.

Then, make BABBLE reporting consistent: this is a data overrun/underrun
of the device itself, not the buffers passed to the controller.
This then leaves B_DEV_FIFO_OVERRUN/UNDERRUN unused, and thus usable
for reporting ring overrun/underrun on isochronous transfers.

The API documentation already described DATA_OVERRUN/UNDERRUN basically
like they were babble errors, while FIFO_OVERRUN/UNDERRUN are
currently described as "internal errors" at present. No driver actually
checked for these.
This commit is contained in:
Augustin Cavalier 2024-01-31 13:54:53 -05:00
parent 22f0158a25
commit be3ce6d7e9
4 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/add-ons/kernel/busses/usb/ehci.cpp
View File

@ -1900,7 +1900,7 @@ EHCI::FinishTransfers()
int32 reasons = 0;
if (status & EHCI_QTD_STATUS_BUFFER) {
callbackStatus = transfer->incoming
? B_DEV_DATA_OVERRUN : B_DEV_DATA_UNDERRUN;
? B_DEV_WRITE_ERROR : B_DEV_READ_ERROR;
reasons++;
}
if (status & EHCI_QTD_STATUS_TERROR) {
@ -1928,7 +1928,7 @@ EHCI::FinishTransfers()
} else if (status & EHCI_QTD_STATUS_BABBLE) {
// there is a babble condition
callbackStatus = transfer->incoming
? B_DEV_FIFO_OVERRUN : B_DEV_FIFO_UNDERRUN;
? B_DEV_DATA_OVERRUN : B_DEV_DATA_UNDERRUN;
} else {
// if the error counter didn't count down to zero
// and there was no babble, then this halt was caused

4
src/add-ons/kernel/busses/usb/ohci.cpp
View File

@ -2594,10 +2594,10 @@ OHCI::_GetStatusOfConditionCode(uint8 conditionCode)
return B_DEV_DATA_UNDERRUN;
case OHCI_TD_CONDITION_BUFFER_OVERRUN:
return B_DEV_FIFO_OVERRUN;
return B_DEV_WRITE_ERROR;
case OHCI_TD_CONDITION_BUFFER_UNDERRUN:
return B_DEV_FIFO_UNDERRUN;
return B_DEV_READ_ERROR;
case OHCI_TD_CONDITION_NOT_ACCESSED:
return B_DEV_PENDING;

4
src/add-ons/kernel/busses/usb/uhci.cpp
View File

@ -1527,7 +1527,7 @@ UHCI::FinishTransfers()
// the error counter counted down to zero, report why
int32 reasons = 0;
if (status & TD_STATUS_ERROR_BUFFER) {
callbackStatus = transfer->incoming ? B_DEV_DATA_OVERRUN : B_DEV_DATA_UNDERRUN;
callbackStatus = transfer->incoming ? B_DEV_WRITE_ERROR : B_DEV_READ_ERROR;
reasons++;
}
if (status & TD_STATUS_ERROR_TIMEOUT) {
@ -1547,7 +1547,7 @@ UHCI::FinishTransfers()
callbackStatus = B_DEV_MULTIPLE_ERRORS;
} else if (status & TD_STATUS_ERROR_BABBLE) {
// there is a babble condition
callbackStatus = transfer->incoming ? B_DEV_FIFO_OVERRUN : B_DEV_FIFO_UNDERRUN;
callbackStatus = transfer->incoming ? B_DEV_DATA_OVERRUN : B_DEV_DATA_UNDERRUN;
} else {
// if the error counter didn't count down to zero
// and there was no babble, then this halt was caused

4
src/add-ons/kernel/busses/usb/xhci.cpp
View File

@ -270,9 +270,9 @@ xhci_error_status(uint32 error, bool directionIn)
case COMP_SUCCESS:
return B_OK;
case COMP_DATA_BUFFER:
return directionIn ? B_DEV_DATA_OVERRUN : B_DEV_DATA_UNDERRUN;
return directionIn ? B_DEV_WRITE_ERROR : B_DEV_READ_ERROR;
case COMP_BABBLE:
return directionIn ? B_DEV_FIFO_OVERRUN : B_DEV_FIFO_UNDERRUN;
return directionIn ? B_DEV_DATA_OVERRUN : B_DEV_DATA_UNDERRUN;
case COMP_MISSED_SERVICE:
return B_DEV_TOO_LATE;
case COMP_USB_TRANSACTION: