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/** @file
Implementation of reading the current interrupt status and recycled transmit
buffer status from a network interface.
Copyright (c) 2004 - 2016, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "Snp.h"
/**
Call undi to get the status of the interrupts, get the list of recycled transmit
buffers that completed transmitting. The recycled transmit buffer address will
be saved into Snp->RecycledTxBuf. This function will also update the MediaPresent
field of EFI_SIMPLE_NETWORK_MODE if UNDI support it.
@param[in] Snp Pointer to snp driver structure.
@param[out] InterruptStatusPtr A non null pointer to contain the interrupt
status.
@param[in] GetTransmittedBuf Set to TRUE to retrieve the recycled transmit
buffer address.
@retval EFI_SUCCESS The status of the network interface was retrieved.
@retval EFI_DEVICE_ERROR The command could not be sent to the network
interface.
**/
EFI_STATUS
PxeGetStatus (
IN SNP_DRIVER *Snp,
OUT UINT32 *InterruptStatusPtr,
IN BOOLEAN GetTransmittedBuf
)
{
PXE_DB_GET_STATUS *Db;
UINT16 InterruptFlags;
UINT32 Index;
UINT64 *Tmp;
Tmp = NULL;
Db = Snp->Db;
Snp->Cdb.OpCode = PXE_OPCODE_GET_STATUS;
Snp->Cdb.OpFlags = 0;
if (GetTransmittedBuf) {
Snp->Cdb.OpFlags |= PXE_OPFLAGS_GET_TRANSMITTED_BUFFERS;
ZeroMem (Db->TxBuffer, sizeof (Db->TxBuffer));
}
if (InterruptStatusPtr != NULL) {
Snp->Cdb.OpFlags |= PXE_OPFLAGS_GET_INTERRUPT_STATUS;
}
if (Snp->MediaStatusSupported) {
Snp->Cdb.OpFlags |= PXE_OPFLAGS_GET_MEDIA_STATUS;
}
Snp->Cdb.CPBsize = PXE_CPBSIZE_NOT_USED;
Snp->Cdb.CPBaddr = PXE_CPBADDR_NOT_USED;
Snp->Cdb.DBsize = (UINT16)sizeof (PXE_DB_GET_STATUS);
Snp->Cdb.DBaddr = (UINT64)(UINTN)Db;
Snp->Cdb.StatCode = PXE_STATCODE_INITIALIZE;
Snp->Cdb.StatFlags = PXE_STATFLAGS_INITIALIZE;
Snp->Cdb.IFnum = Snp->IfNum;
Snp->Cdb.Control = PXE_CONTROL_LAST_CDB_IN_LIST;
//
// Issue UNDI command and check result.
//
DEBUG ((DEBUG_NET, "\nSnp->undi.get_status() "));
(*Snp->IssueUndi32Command)((UINT64)(UINTN)&Snp->Cdb);
if (Snp->Cdb.StatCode != PXE_STATCODE_SUCCESS) {
DEBUG (
(DEBUG_NET,
"\nSnp->undi.get_status() %xh:%xh\n",
Snp->Cdb.StatFlags,
Snp->Cdb.StatCode)
);
return EFI_DEVICE_ERROR;
}
//
// report the values back..
//
if (InterruptStatusPtr != NULL) {
InterruptFlags = (UINT16)(Snp->Cdb.StatFlags & PXE_STATFLAGS_GET_STATUS_INTERRUPT_MASK);
*InterruptStatusPtr = 0;
if ((InterruptFlags & PXE_STATFLAGS_GET_STATUS_RECEIVE) == PXE_STATFLAGS_GET_STATUS_RECEIVE) {
*InterruptStatusPtr |= EFI_SIMPLE_NETWORK_RECEIVE_INTERRUPT;
}
if ((InterruptFlags & PXE_STATFLAGS_GET_STATUS_TRANSMIT) == PXE_STATFLAGS_GET_STATUS_TRANSMIT) {
*InterruptStatusPtr |= EFI_SIMPLE_NETWORK_TRANSMIT_INTERRUPT;
}
if ((InterruptFlags & PXE_STATFLAGS_GET_STATUS_COMMAND) == PXE_STATFLAGS_GET_STATUS_COMMAND) {
*InterruptStatusPtr |= EFI_SIMPLE_NETWORK_COMMAND_INTERRUPT;
}
if ((InterruptFlags & PXE_STATFLAGS_GET_STATUS_SOFTWARE) == PXE_STATFLAGS_GET_STATUS_SOFTWARE) {
*InterruptStatusPtr |= EFI_SIMPLE_NETWORK_COMMAND_INTERRUPT;
}
}
if (GetTransmittedBuf) {
if ((Snp->Cdb.StatFlags & PXE_STATFLAGS_GET_STATUS_NO_TXBUFS_WRITTEN) == 0) {
//
// UNDI has written some transmitted buffer addresses into the DB. Store them into Snp->RecycledTxBuf.
//
for (Index = 0; Index < MAX_XMIT_BUFFERS; Index++) {
if (Db->TxBuffer[Index] != 0) {
if (Snp->RecycledTxBufCount == Snp->MaxRecycledTxBuf) {
//
// Snp->RecycledTxBuf is full, reallocate a new one.
//
if ((Snp->MaxRecycledTxBuf + SNP_TX_BUFFER_INCREASEMENT) >= SNP_MAX_TX_BUFFER_NUM) {
return EFI_DEVICE_ERROR;
}
Tmp = AllocatePool (sizeof (UINT64) * (Snp->MaxRecycledTxBuf + SNP_TX_BUFFER_INCREASEMENT));
if (Tmp == NULL) {
return EFI_DEVICE_ERROR;
}
CopyMem (Tmp, Snp->RecycledTxBuf, sizeof (UINT64) * Snp->RecycledTxBufCount);
FreePool (Snp->RecycledTxBuf);
Snp->RecycledTxBuf = Tmp;
Snp->MaxRecycledTxBuf += SNP_TX_BUFFER_INCREASEMENT;
}
Snp->RecycledTxBuf[Snp->RecycledTxBufCount] = Db->TxBuffer[Index];
Snp->RecycledTxBufCount++;
}
}
}
}
//
// Update MediaPresent field of EFI_SIMPLE_NETWORK_MODE if the UNDI support
// returning media status from GET_STATUS command
//
if (Snp->MediaStatusSupported) {
Snp->Snp.Mode->MediaPresent =
(BOOLEAN)(((Snp->Cdb.StatFlags & PXE_STATFLAGS_GET_STATUS_NO_MEDIA) != 0) ? FALSE : TRUE);
}
return EFI_SUCCESS;
}
/**
Reads the current interrupt status and recycled transmit buffer status from a
network interface.
This function gets the current interrupt and recycled transmit buffer status
from the network interface. The interrupt status is returned as a bit mask in
InterruptStatus. If InterruptStatus is NULL, the interrupt status will not be
read. If TxBuf is not NULL, a recycled transmit buffer address will be retrieved.
If a recycled transmit buffer address is returned in TxBuf, then the buffer has
been successfully transmitted, and the status for that buffer is cleared. If
the status of the network interface is successfully collected, EFI_SUCCESS
will be returned. If the driver has not been initialized, EFI_DEVICE_ERROR will
be returned.
@param This A pointer to the EFI_SIMPLE_NETWORK_PROTOCOL instance.
@param InterruptStatus A pointer to the bit mask of the currently active
interrupts (see "Related Definitions"). If this is NULL,
the interrupt status will not be read from the device.
If this is not NULL, the interrupt status will be read
from the device. When the interrupt status is read, it
will also be cleared. Clearing the transmit interrupt does
not empty the recycled transmit buffer array.
@param TxBuf Recycled transmit buffer address. The network interface
will not transmit if its internal recycled transmit
buffer array is full. Reading the transmit buffer does
not clear the transmit interrupt. If this is NULL, then
the transmit buffer status will not be read. If there
are no transmit buffers to recycle and TxBuf is not NULL,
TxBuf will be set to NULL.
@retval EFI_SUCCESS The status of the network interface was retrieved.
@retval EFI_NOT_STARTED The network interface has not been started.
@retval EFI_INVALID_PARAMETER This parameter was NULL or did not point to a valid
EFI_SIMPLE_NETWORK_PROTOCOL structure.
@retval EFI_DEVICE_ERROR The command could not be sent to the network
interface.
**/
EFI_STATUS
EFIAPI
SnpUndi32GetStatus (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
OUT UINT32 *InterruptStatus OPTIONAL,
OUT VOID **TxBuf OPTIONAL
)
{
SNP_DRIVER *Snp;
EFI_TPL OldTpl;
EFI_STATUS Status;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
if ((InterruptStatus == NULL) && (TxBuf == NULL)) {
return EFI_INVALID_PARAMETER;
}
Snp = EFI_SIMPLE_NETWORK_DEV_FROM_THIS (This);
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
if (Snp == NULL) {
return EFI_DEVICE_ERROR;
}
switch (Snp->Mode.State) {
case EfiSimpleNetworkInitialized:
break;
case EfiSimpleNetworkStopped:
Status = EFI_NOT_STARTED;
goto ON_EXIT;
default:
Status = EFI_DEVICE_ERROR;
goto ON_EXIT;
}
if ((Snp->RecycledTxBufCount == 0) && (TxBuf != NULL)) {
Status = PxeGetStatus (Snp, InterruptStatus, TRUE);
} else {
Status = PxeGetStatus (Snp, InterruptStatus, FALSE);
}
if (TxBuf != NULL) {
//
// Get a recycled buf from Snp->RecycledTxBuf
//
if (Snp->RecycledTxBufCount == 0) {
*TxBuf = NULL;
} else {
Snp->RecycledTxBufCount--;
*TxBuf = (VOID *)(UINTN)Snp->RecycledTxBuf[Snp->RecycledTxBufCount];
}
}
ON_EXIT:
gBS->RestoreTPL (OldTpl);
return Status;
}
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