/** @file
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Gbe Library.
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All function in this library is available for PEI, DXE, and SMM,
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But do not support UEFI RUNTIME environment call.
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Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Base.h>
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#include <Uefi/UefiBaseType.h>
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#include <Library/IoLib.h>
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#include <Library/DebugLib.h>
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#include <Library/BaseLib.h>
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#include <Library/PciSegmentLib.h>
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#include <Library/PchInfoLib.h>
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#include <Library/PchPcrLib.h>
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#include <Library/PchCycleDecodingLib.h>
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#include <Library/PmcPrivateLib.h>
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#include <Library/SpiAccessLib.h>
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#include <Library/GbeMdiLib.h>
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#include <IndustryStandard/Pci30.h>
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#include <Register/PchRegs.h>
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#include <Register/GbeRegs.h>
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#include <Library/PchPciBdfLib.h>
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/**
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Check whether GbE region is valid
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Check SPI region directly since GbE might be disabled in SW.
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@retval TRUE Gbe Region is valid
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@retval FALSE Gbe Region is invalid
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**/
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BOOLEAN
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IsGbeRegionValid (
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VOID
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)
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{
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return SpiIsGbeRegionValid ();
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}
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/**
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Check whether GBE controller is enabled in the platform.
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@retval TRUE GbE is enabled
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@retval FALSE GbE is disabled
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**/
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BOOLEAN
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IsGbePresent (
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VOID
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)
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{
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//
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// Check PCH Support
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//
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if (!PchIsGbeSupported ()) {
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return FALSE;
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}
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//
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// Check PMC strap/fuse
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//
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if (!PmcIsGbeSupported ()) {
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return FALSE;
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}
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//
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// Check GbE NVM
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//
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if (IsGbeRegionValid () == FALSE) {
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return FALSE;
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}
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return TRUE;
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}
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/**
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Verifies Gigabit Ethernet PCI Class Code
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@param [in] GbePciCfgBase GbE PCI Config Space Address
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@retval TRUE GbE Class Code match
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@retval FALSE GbE Class Code does not match
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**/
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BOOLEAN
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STATIC
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GbeCheckClassCode (
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UINT64 GbePciCfgBase
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)
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{
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UINT8 BaseCode;
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UINT8 SubClassCode;
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SubClassCode = PciSegmentRead8 (GbePciCfgBase + PCI_CLASSCODE_OFFSET + 1);
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BaseCode = PciSegmentRead8 (GbePciCfgBase + PCI_CLASSCODE_OFFSET + 2);
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if ((BaseCode != PCI_CLASS_NETWORK) || (SubClassCode != PCI_CLASS_NETWORK_ETHERNET)) {
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DEBUG ((DEBUG_ERROR, "GbeCheckClassCode : BaseCode(0x%x) or ClassCode(0x%x) is not supported\n", BaseCode, SubClassCode));
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ASSERT (FALSE);
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return FALSE;
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}
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return TRUE;
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}
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/**
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Checks if Gbe is Enabled or Disabled
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@retval BOOLEAN TRUE if device is enabled, FALSE otherwise.
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**/
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BOOLEAN
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IsGbeEnabled (
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VOID
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)
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{
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UINT64 GbePciBase;
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GbePciBase = GbePciCfgBase ();
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if (PciSegmentRead32 (GbePciBase) != 0xFFFFFFFF) {
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return GbeCheckClassCode (GbePciBase);
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}
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return FALSE;
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}
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