[reactos] 01/02: [USBOHCI_NEW] Zero out the transfer descriptor right after allocation. Cleaned up transfer routines and added some more docs.
25 Jun
2019
25 Jun
'19
12:15 p.m.
https://git.reactos.org/?p=reactos.git;a=commitdiff;h=9004e64b574adc8a57587…
commit 9004e64b574adc8a575870f2faadd400cac21201
Author: Victor Perevertkin <victor(a)perevertkin.ru>
AuthorDate: Tue Jun 25 15:03:26 2019 +0300
Commit: Victor Perevertkin <victor(a)perevertkin.ru>
CommitDate: Tue Jun 25 15:03:26 2019 +0300
[USBOHCI_NEW] Zero out the transfer descriptor right after allocation.
Cleaned up transfer routines and added some more docs.
---
drivers/usb/usbohci_new/usbohci.c | 178 +++++++++++++-------------------------
1 file changed, 61 insertions(+), 117 deletions(-)
diff --git a/drivers/usb/usbohci_new/usbohci.c b/drivers/usb/usbohci_new/usbohci.c
index 8e05468ef44..6216f80b75f 100644
--- a/drivers/usb/usbohci_new/usbohci.c
+++ b/drivers/usb/usbohci_new/usbohci.c
@@ -1246,6 +1246,8 @@ OHCI_AllocateTD(IN POHCI_EXTENSION OhciExtension,
TD->Flags |= OHCI_HCD_TD_FLAG_ALLOCATED;
+ RtlSecureZeroMemory(&TD->HwTD, sizeof(TD->HwTD));
+
return TD;
}
@@ -1277,23 +1279,19 @@ OHCI_RemainTDs(IN POHCI_EXTENSION OhciExtension,
return RemainTDs;
}
+static
MPSTATUS
-NTAPI
OHCI_ControlTransfer(IN POHCI_EXTENSION OhciExtension,
IN POHCI_ENDPOINT OhciEndpoint,
IN PUSBPORT_TRANSFER_PARAMETERS TransferParameters,
IN POHCI_TRANSFER OhciTransfer,
IN PUSBPORT_SCATTER_GATHER_LIST SGList)
{
- POHCI_HCD_TD FirstTD;
- ULONG FirstTdPA;
+ POHCI_HCD_TD SetupTD;
POHCI_HCD_TD TD;
- POHCI_HCD_TD TD2;
POHCI_HCD_TD PrevTD;
- POHCI_HCD_TD NextTD;
ULONG MaxTDs;
ULONG TransferedLen;
- ULONG BufferEnd;
UCHAR DataToggle;
DPRINT_OHCI("OHCI_ControlTransfer: Ext %p, Endpoint %p\n",
@@ -1305,65 +1303,39 @@ OHCI_ControlTransfer(IN POHCI_EXTENSION OhciExtension,
if ((SGList->SgElementCount + OHCI_NON_DATA_CONTROL_TDS) > MaxTDs)
return MP_STATUS_FAILURE;
- FirstTD = OhciEndpoint->HcdTailP;
- FirstTD->HwTD.gTD.Control.DelayInterrupt = OHCI_TD_INTERRUPT_NONE;
+ /* Form a setup packet first */
+ SetupTD = OhciEndpoint->HcdTailP;
+ RtlSecureZeroMemory(&SetupTD->HwTD, sizeof(SetupTD->HwTD));
- FirstTD->HwTD.gTD.NextTD = 0;
- FirstTD->HwTD.gTD.CurrentBuffer = 0;
- FirstTD->HwTD.gTD.BufferEnd = 0;
-
- FirstTD->Flags |= OHCI_HCD_TD_FLAG_PROCESSED;
- FirstTD->NextHcdTD = 0;
- FirstTD->OhciTransfer = OhciTransfer;
-
- FirstTD->HwTD.Padded[0] = 0;
- FirstTD->HwTD.Padded[1] = 0;
+ SetupTD->Flags |= OHCI_HCD_TD_FLAG_PROCESSED;
+ SetupTD->OhciTransfer = OhciTransfer;
OhciTransfer->PendingTDs++;
- RtlCopyMemory(&FirstTD->HwTD.SetupPacket,
+ RtlCopyMemory(&SetupTD->HwTD.SetupPacket,
&TransferParameters->SetupPacket,
- sizeof(FirstTD->HwTD.SetupPacket));
-
- FirstTdPA = FirstTD->PhysicalAddress;
-
- FirstTD->HwTD.gTD.CurrentBuffer = FirstTdPA + FIELD_OFFSET(OHCI_HCD_TD,
HwTD.SetupPacket);
+ sizeof(SetupTD->HwTD.SetupPacket));
- BufferEnd = FirstTdPA + FIELD_OFFSET(OHCI_HCD_TD, HwTD.SetupPacket) +
- sizeof(USB_DEFAULT_PIPE_SETUP_PACKET) - 1;
+ SetupTD->HwTD.gTD.CurrentBuffer = SetupTD->PhysicalAddress +
FIELD_OFFSET(OHCI_HCD_TD, HwTD.SetupPacket);
+ SetupTD->HwTD.gTD.BufferEnd = SetupTD->PhysicalAddress +
FIELD_OFFSET(OHCI_HCD_TD, HwTD.SetupPacket) +
+ sizeof(USB_DEFAULT_PIPE_SETUP_PACKET) - 1;
+ SetupTD->HwTD.gTD.Control.DelayInterrupt = OHCI_TD_INTERRUPT_NONE;
+ SetupTD->HwTD.gTD.Control.ConditionCode = OHCI_TD_CONDITION_NOT_ACCESSED;
+ SetupTD->HwTD.gTD.Control.DataToggle = OHCI_TD_DATA_TOGGLE_DATA0;
- FirstTD->HwTD.gTD.BufferEnd = BufferEnd;
+ PrevTD = SetupTD;
- FirstTD->HwTD.gTD.Control.AsULONG = 0;
- FirstTD->HwTD.gTD.Control.DelayInterrupt = OHCI_TD_INTERRUPT_NONE;
- FirstTD->HwTD.gTD.Control.ConditionCode = OHCI_TD_CONDITION_NOT_ACCESSED;
- FirstTD->HwTD.gTD.Control.DataToggle = OHCI_TD_DATA_TOGGLE_DATA0;
+ /* Data packets follow a setup packet (if any) */
+ TD = OHCI_AllocateTD(OhciExtension, OhciEndpoint);
+ TD->Flags |= OHCI_HCD_TD_FLAG_PROCESSED;
+ TD->OhciTransfer = OhciTransfer;
- TD2 = OHCI_AllocateTD(OhciExtension, OhciEndpoint);
-
- TD2->HwTD.gTD.Control.DelayInterrupt = OHCI_TD_INTERRUPT_NONE;
- TD2->HwTD.gTD.CurrentBuffer = 0;
- TD2->HwTD.gTD.BufferEnd = 0;
- TD2->HwTD.gTD.NextTD = 0;
-
- TD2->Flags |= OHCI_HCD_TD_FLAG_PROCESSED;
- TD2->NextHcdTD = 0;
- TD2->OhciTransfer = OhciTransfer;
-
- RtlZeroMemory(&TD2->HwTD.SetupPacket,
- sizeof(TD2->HwTD.SetupPacket));
-
- TD2->HwTD.Padded[0] = 0;
- TD2->HwTD.Padded[1] = 0;
-
- PrevTD = FirstTD;
- TD = TD2;
-
- PrevTD->HwTD.gTD.NextTD = TD2->PhysicalAddress;
- PrevTD->NextHcdTD = TD2;
+ PrevTD->HwTD.gTD.NextTD = TD->PhysicalAddress;
+ PrevTD->NextHcdTD = TD;
- TransferedLen = 0;
+ /* The first data packet should use DATA1, subsequent ones use DATA0 (OpenHCI spec,
4.3.1.3.4) */
DataToggle = OHCI_TD_DATA_TOGGLE_DATA1;
+ TransferedLen = 0;
while (TransferedLen < TransferParameters->TransferBufferLength)
{
@@ -1375,10 +1347,8 @@ OHCI_ControlTransfer(IN POHCI_EXTENSION OhciExtension,
TD->HwTD.gTD.Control.DirectionPID = OHCI_TD_DIRECTION_PID_OUT;
TD->HwTD.gTD.Control.DelayInterrupt = OHCI_TD_INTERRUPT_NONE;
- TD->HwTD.gTD.Control.DataToggle = DataToggle;
TD->HwTD.gTD.Control.ConditionCode = OHCI_TD_CONDITION_NOT_ACCESSED;
-
- DataToggle = OHCI_TD_DATA_TOGGLE_FROM_ED;
+ TD->HwTD.gTD.Control.DataToggle = DataToggle;
TransferedLen = OHCI_MapTransferToTD(OhciExtension,
TransferedLen,
@@ -1389,26 +1359,14 @@ OHCI_ControlTransfer(IN POHCI_EXTENSION OhciExtension,
PrevTD = TD;
TD = OHCI_AllocateTD(OhciExtension, OhciEndpoint);
-
- TD->Flags |= OHCI_HCD_TD_FLAG_PROCESSED;
-
- TD->HwTD.gTD.NextTD = 0;
TD->HwTD.gTD.Control.DelayInterrupt = OHCI_TD_INTERRUPT_NONE;
-
- TD->NextHcdTD = 0;
+ TD->Flags |= OHCI_HCD_TD_FLAG_PROCESSED;
TD->OhciTransfer = OhciTransfer;
- TD->HwTD.gTD.CurrentBuffer = 0;
- TD->HwTD.gTD.BufferEnd = 0;
-
- RtlZeroMemory(&TD->HwTD.SetupPacket,
- sizeof(TD->HwTD.SetupPacket));
-
- TD->HwTD.Padded[0] = 0;
- TD->HwTD.Padded[1] = 0;
-
PrevTD->HwTD.gTD.NextTD = TD->PhysicalAddress;
PrevTD->NextHcdTD = TD;
+
+ DataToggle = OHCI_TD_DATA_TOGGLE_DATA0;
}
if (TransferParameters->TransferFlags & USBD_SHORT_TRANSFER_OK)
@@ -1417,16 +1375,14 @@ OHCI_ControlTransfer(IN POHCI_EXTENSION OhciExtension,
OhciTransfer->Flags |= OHCI_TRANSFER_FLAGS_SHORT_TRANSFER_OK;
}
- TD->HwTD.gTD.CurrentBuffer = 0;
- TD->HwTD.gTD.BufferEnd = 0;
+ /* After data packets, goes a status packet */
TD->Flags |= OHCI_HCD_TD_FLAG_CONTROL_STATUS;
TD->TransferLen = 0;
- TD->HwTD.gTD.Control.AsULONG = 0;
-
if ((TransferParameters->TransferFlags & USBD_TRANSFER_DIRECTION_IN) != 0)
{
+ TD->HwTD.gTD.Control.BufferRounding = FALSE;
TD->HwTD.gTD.Control.DirectionPID = OHCI_TD_DIRECTION_PID_OUT;
}
else
@@ -1435,44 +1391,37 @@ OHCI_ControlTransfer(IN POHCI_EXTENSION OhciExtension,
TD->HwTD.gTD.Control.DirectionPID = OHCI_TD_DIRECTION_PID_IN;
}
+ /* OpenHCI spec, 4.3.1.3.4 */
TD->HwTD.gTD.Control.DataToggle = OHCI_TD_DATA_TOGGLE_DATA1;
TD->HwTD.gTD.Control.ConditionCode = OHCI_TD_CONDITION_NOT_ACCESSED;
+ TD->HwTD.gTD.Control.DelayInterrupt = OHCI_TD_INTERRUPT_IMMEDIATE;
OhciTransfer->PendingTDs++;
OhciTransfer->ControlStatusTD = TD;
- NextTD = OHCI_AllocateTD(OhciExtension, OhciEndpoint);
+ PrevTD = TD;
- TD->HwTD.gTD.NextTD = NextTD->PhysicalAddress;
- TD->NextHcdTD = NextTD;
+ /* And the last descriptor, which is not used in the current transfer (OpenHCI spec,
4.6) */
+ TD = OHCI_AllocateTD(OhciExtension, OhciEndpoint);
- NextTD->NextHcdTD = 0;
- NextTD->HwTD.gTD.NextTD = 0;
+ PrevTD->HwTD.gTD.NextTD = TD->PhysicalAddress;
+ PrevTD->NextHcdTD = TD;
- OhciTransfer->NextTD = NextTD;
- OhciEndpoint->HcdTailP = NextTD;
+ TD->NextHcdTD = 0;
+ /* TD->HwTD.gTD.NextTD = 0; */
- OhciEndpoint->HcdED->HwED.TailPointer = NextTD->PhysicalAddress;
+ OhciTransfer->NextTD = TD;
+ OhciEndpoint->HcdTailP = TD;
+
+ OhciEndpoint->HcdED->HwED.TailPointer = TD->PhysicalAddress;
OHCI_EnableList(OhciExtension, OhciEndpoint);
return MP_STATUS_SUCCESS;
}
-/**
- * @brief Creates the transfer descriptor chain for the given transfer's buffer
- * and attaches it to a given endpoint (for bulk or interrupt transfers)
- *
- * @param[in] OhciExtension The ohci extension
- * @param[in] OhciEndpoint The ohci endpoint
- * @param[in] TransferParameters The transfer parameters
- * @param[in] OhciTransfer The ohci transfer
- * @param[in] SGList The scatter/gather list
- *
- * @return MP_STATUS_SUCCESS or MP_STATUS_FAILURE if there are not enough TDs left
- */
+static
MPSTATUS
-NTAPI
OHCI_BulkOrInterruptTransfer(IN POHCI_EXTENSION OhciExtension,
IN POHCI_ENDPOINT OhciEndpoint,
IN PUSBPORT_TRANSFER_PARAMETERS TransferParameters,
@@ -1497,13 +1446,12 @@ OHCI_BulkOrInterruptTransfer(IN POHCI_EXTENSION OhciExtension,
do
{
- TD->HwTD.gTD.Control.AsULONG = 0;
TD->HwTD.gTD.Control.DelayInterrupt = OHCI_TD_INTERRUPT_NONE;
TD->HwTD.gTD.Control.ConditionCode = OHCI_TD_CONDITION_NOT_ACCESSED;
if (TransferParameters->TransferFlags & USBD_TRANSFER_DIRECTION_IN)
{
- TD->HwTD.gTD.Control.BufferRounding = 0;
+ TD->HwTD.gTD.Control.BufferRounding = FALSE;
TD->HwTD.gTD.Control.DirectionPID = OHCI_TD_DIRECTION_PID_IN;
}
else
@@ -1512,19 +1460,8 @@ OHCI_BulkOrInterruptTransfer(IN POHCI_EXTENSION OhciExtension,
TD->HwTD.gTD.Control.DirectionPID = OHCI_TD_DIRECTION_PID_OUT;
}
- TD->HwTD.gTD.CurrentBuffer = 0;
- TD->HwTD.gTD.NextTD = 0;
- TD->HwTD.gTD.BufferEnd = 0;
-
- RtlZeroMemory(&TD->HwTD.SetupPacket,
- sizeof(TD->HwTD.SetupPacket));
-
- TD->HwTD.Padded[0] = 0;
- TD->HwTD.Padded[1] = 0;
-
TD->Flags |= OHCI_HCD_TD_FLAG_PROCESSED;
TD->OhciTransfer = OhciTransfer;
- TD->NextHcdTD = 0;
if (TransferParameters->TransferBufferLength)
{
@@ -1537,10 +1474,6 @@ OHCI_BulkOrInterruptTransfer(IN POHCI_EXTENSION OhciExtension,
else
{
ASSERT(SGList->SgElementCount == 0);
-
- TD->HwTD.gTD.CurrentBuffer = 0;
- TD->HwTD.gTD.BufferEnd = 0;
-
TD->TransferLen = 0;
}
@@ -1561,13 +1494,11 @@ OHCI_BulkOrInterruptTransfer(IN POHCI_EXTENSION OhciExtension,
}
PrevTD->HwTD.gTD.Control.DelayInterrupt = OHCI_TD_INTERRUPT_IMMEDIATE;
- PrevTD->HwTD.gTD.NextTD = TD->PhysicalAddress;
- PrevTD->NextHcdTD = TD;
/* The last TD in a chain is not used in a transfer. The controller does not access
it
* so it will be used for chaining a next transfer to it (OpenHCI spec, 4.6)
*/
- TD->HwTD.gTD.NextTD = 0;
+ /* TD->HwTD.gTD.NextTD = 0; */
TD->NextHcdTD = 0;
OhciTransfer->NextTD = TD;
@@ -1580,6 +1511,19 @@ OHCI_BulkOrInterruptTransfer(IN POHCI_EXTENSION OhciExtension,
return MP_STATUS_SUCCESS;
}
+/**
+ * @brief Creates the transfer descriptor chain for the given transfer's buffer
+ * and attaches it to a given endpoint (for control, bulk or interrupt
transfers)
+ *
+ * @param[in] OhciExtension The ohci extension
+ * @param[in] OhciEndpoint The ohci endpoint
+ * @param[in] TransferParameters The transfer parameters
+ * @param[in] OhciTransfer The ohci transfer
+ * @param[in] SGList The scatter/gather list
+ *
+ * @return MP_STATUS_SUCCESS or MP_STATUS_FAILURE if there are not enough TDs left
+ * or wrong transfer type given
+ */
MPSTATUS
NTAPI
OHCI_SubmitTransfer(IN PVOID ohciExtension,
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Victor Perevertkin