diff options
Diffstat (limited to 'EmbeddedPkg/Drivers/Lan9118Dxe/Lan9118Dxe.c')
| -rw-r--r-- | EmbeddedPkg/Drivers/Lan9118Dxe/Lan9118Dxe.c | 130 |
1 files changed, 76 insertions, 54 deletions
diff --git a/EmbeddedPkg/Drivers/Lan9118Dxe/Lan9118Dxe.c b/EmbeddedPkg/Drivers/Lan9118Dxe/Lan9118Dxe.c index 507e55f450..60b8c96dda 100644 --- a/EmbeddedPkg/Drivers/Lan9118Dxe/Lan9118Dxe.c +++ b/EmbeddedPkg/Drivers/Lan9118Dxe/Lan9118Dxe.c @@ -99,16 +99,25 @@ Lan9118DxeEntry ( SnpMode->NvRamSize = 0; // No NVRAM with this device
SnpMode->NvRamAccessSize = 0; // No NVRAM with this device
- // Update network mode information
- SnpMode->ReceiveFilterMask = EFI_SIMPLE_NETWORK_RECEIVE_MULTICAST |
- EFI_SIMPLE_NETWORK_RECEIVE_UNICAST |
- EFI_SIMPLE_NETWORK_RECEIVE_BROADCAST |
- EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS;/* |
- EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS_MULTICAST;*/
- // Current allowed settings
- SnpMode->ReceiveFilterSetting = EFI_SIMPLE_NETWORK_RECEIVE_MULTICAST |
- EFI_SIMPLE_NETWORK_RECEIVE_UNICAST |
- EFI_SIMPLE_NETWORK_RECEIVE_BROADCAST;
+ //
+ // Claim that all receive filter settings are supported, though the MULTICAST mode
+ // is not completely supported. The LAN9118 Ethernet controller is only able to
+ // do a "hash filtering" and not a perfect filtering on multicast addresses. The
+ // controller does not filter the multicast addresses directly but a hash value
+ // of them. The hash value of a multicast address is derived from its CRC and
+ // ranges from 0 to 63 included.
+ // We claim that the perfect MULTICAST filtering mode is supported because
+ // we do not want the user to switch directly to the PROMISCOUS_MULTICAST mode
+ // and thus not being able to take advantage of the hash filtering.
+ //
+ SnpMode->ReceiveFilterMask = EFI_SIMPLE_NETWORK_RECEIVE_UNICAST |
+ EFI_SIMPLE_NETWORK_RECEIVE_MULTICAST |
+ EFI_SIMPLE_NETWORK_RECEIVE_BROADCAST |
+ EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS |
+ EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS_MULTICAST;
+
+ // We do not intend to receive anything for the time being.
+ SnpMode->ReceiveFilterSetting = 0;
// LAN9118 has 64bit hash table, can filter 64 MCast MAC Addresses
SnpMode->MaxMCastFilterCount = MAX_MCAST_FILTER_CNT;
@@ -344,12 +353,7 @@ SnpInitialize ( return Status;
}
- // Enable the receiver and transmitter
- Status = StartRx (0, Snp);
- if (EFI_ERROR(Status)) {
- return Status;
- }
-
+ // Enable the transmitter
Status = StartTx (START_TX_MAC | START_TX_CFG, Snp);
if (EFI_ERROR(Status)) {
return Status;
@@ -553,7 +557,9 @@ SnpReceiveFilters ( UINT32 Crc;
UINT8 HashValue;
UINT32 MacCSRValue;
+ UINT32 ReceiveFilterSetting;
EFI_MAC_ADDRESS *Mac;
+ EFI_MAC_ADDRESS ZeroMac;
// Check Snp Instance
if (Snp == NULL) {
@@ -632,70 +638,74 @@ SnpReceiveFilters ( }
//
+ // Before to change anything, stop and reset the reception of
+ // packets.
+ //
+ StopRx (STOP_RX_CLEAR, Snp);
+
+ //
// Write the mask of the selected hash values for the multicast filtering.
// The two masks are set to zero if the multicast filtering is not enabled.
//
IndirectMACWrite32 (INDIRECT_MAC_INDEX_HASHL, MultHashTableLow);
IndirectMACWrite32 (INDIRECT_MAC_INDEX_HASHH, MultHashTableHigh);
+ ReceiveFilterSetting = (Mode->ReceiveFilterSetting | Enable) & (~Disable);
+
+ //
// Read MAC controller
- MacCSRValue = IndirectMACRead32 (INDIRECT_MAC_INDEX_CR);
+ //
+ MacCSRValue = IndirectMACRead32 (INDIRECT_MAC_INDEX_CR);
+ MacCSRValue &= ~(MACCR_HPFILT | MACCR_BCAST | MACCR_PRMS | MACCR_MCPAS);
- // Set the options for the MAC_CSR
- if (Enable & EFI_SIMPLE_NETWORK_RECEIVE_UNICAST) {
- StartRx (0, Snp);
+ if (ReceiveFilterSetting & EFI_SIMPLE_NETWORK_RECEIVE_UNICAST) {
+ Lan9118SetMacAddress (&Mode->CurrentAddress, Snp);
DEBUG ((DEBUG_NET, "Allowing Unicast Frame Reception\n"));
+ } else {
+ //
+ // The Unicast packets do not have to be listen to, set the MAC
+ // address of the LAN9118 to be the "not configured" all zeroes
+ // ethernet MAC address.
+ //
+ ZeroMem (&ZeroMac, NET_ETHER_ADDR_LEN);
+ Lan9118SetMacAddress (&ZeroMac, Snp);
}
- if (Disable & EFI_SIMPLE_NETWORK_RECEIVE_UNICAST) {
- StopRx (0, Snp);
- DEBUG ((DEBUG_NET, "Disabling Unicast Frame Reception\n"));
- }
-
- if (Enable & EFI_SIMPLE_NETWORK_RECEIVE_MULTICAST) {
+ if (ReceiveFilterSetting & EFI_SIMPLE_NETWORK_RECEIVE_MULTICAST) {
MacCSRValue |= MACCR_HPFILT;
DEBUG ((DEBUG_NET, "Allowing Multicast Frame Reception\n"));
}
- if (Disable & EFI_SIMPLE_NETWORK_RECEIVE_MULTICAST) {
- MacCSRValue &= ~MACCR_HPFILT;
- DEBUG ((DEBUG_NET, "Disabling Multicast Frame Reception\n"));
- }
-
- if (Enable & EFI_SIMPLE_NETWORK_RECEIVE_BROADCAST) {
- MacCSRValue &= ~(MACCR_BCAST);
- DEBUG ((DEBUG_NET, "Allowing Broadcast Frame Reception\n"));
+ if (ReceiveFilterSetting & EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS_MULTICAST) {
+ MacCSRValue |= MACCR_MCPAS;
+ DEBUG ((DEBUG_NET, "Enabling Promiscuous Multicast Mode\n"));
}
- if (Disable & EFI_SIMPLE_NETWORK_RECEIVE_BROADCAST) {
+ if ((ReceiveFilterSetting & EFI_SIMPLE_NETWORK_RECEIVE_BROADCAST) == 0) {
MacCSRValue |= MACCR_BCAST;
- DEBUG ((DEBUG_NET, "Disabling Broadcast Frame Reception\n"));
+ } else {
+ DEBUG ((DEBUG_NET, "Allowing Broadcast Frame Reception\n"));
}
- if (Enable & EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS) {
+ if (ReceiveFilterSetting & EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS) {
MacCSRValue |= MACCR_PRMS;
DEBUG ((DEBUG_NET, "Enabling Promiscuous Mode\n"));
}
- if (Disable & EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS) {
- MacCSRValue &= ~MACCR_PRMS;
- DEBUG ((DEBUG_NET, "Disabling Promiscuous Mode\n"));
- }
-
- if (Enable & EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS_MULTICAST) {
- MacCSRValue |= (MACCR_HPFILT | MACCR_PRMS);
- DEBUG ((DEBUG_NET, "Enabling Promiscuous Multicast Mode\n"));
- }
-
- if (Disable & EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS_MULTICAST) {
- MacCSRValue &= ~(MACCR_HPFILT | MACCR_PRMS);
- DEBUG ((DEBUG_NET, "Disabling Promiscuous Multicast Mode\n"));
- }
-
+ //
// Write the options to the MAC_CSR
+ //
IndirectMACWrite32 (INDIRECT_MAC_INDEX_CR, MacCSRValue);
gBS->Stall (LAN9118_STALL);
+ //
+ // If we have to retrieve something, start packet reception.
+ //
+ Mode->ReceiveFilterSetting = ReceiveFilterSetting;
+ if (ReceiveFilterSetting != 0) {
+ StartRx (0, Snp);
+ }
+
return EFI_SUCCESS;
}
@@ -769,8 +779,20 @@ SnpStationAddress ( }
}
- // Write address
- Lan9118SetMacAddress (New, Snp);
+ CopyMem (&Snp->Mode->CurrentAddress, New, NET_ETHER_ADDR_LEN);
+
+ //
+ // If packet reception is currently activated, stop and reset it,
+ // set the new ethernet address and restart the packet reception.
+ // Otherwise, nothing to do, the MAC address will be updated in
+ // SnpReceiveFilters() when the UNICAST packet reception will be
+ // activated.
+ //
+ if (Snp->Mode->ReceiveFilterSetting != 0) {
+ StopRx (STOP_RX_CLEAR, Snp);
+ Lan9118SetMacAddress (New, Snp);
+ StartRx (0, Snp);
+ }
return EFI_SUCCESS;
}
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