diff options
Diffstat (limited to 'src/vendorcode/amd/agesa/f14/Proc/GNB/Modules/GnbPcieInitLibV1/PcieAspmExitLatency.c')
| -rw-r--r-- | src/vendorcode/amd/agesa/f14/Proc/GNB/Modules/GnbPcieInitLibV1/PcieAspmExitLatency.c | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/src/vendorcode/amd/agesa/f14/Proc/GNB/Modules/GnbPcieInitLibV1/PcieAspmExitLatency.c b/src/vendorcode/amd/agesa/f14/Proc/GNB/Modules/GnbPcieInitLibV1/PcieAspmExitLatency.c new file mode 100644 index 0000000000..1dffc52b80 --- /dev/null +++ b/src/vendorcode/amd/agesa/f14/Proc/GNB/Modules/GnbPcieInitLibV1/PcieAspmExitLatency.c @@ -0,0 +1,192 @@ +/* $NoKeywords:$ */ +/** + * @file + * + * Service procedure to calculate PCIe topology segment maximum exit latency + * + * + * + * @xrefitem bom "File Content Label" "Release Content" + * @e project: AGESA + * @e sub-project: GNB + * @e \$Revision: 38298 $ @e \$Date: 2010-09-21 07:15:32 -0700 (Tue, 21 Sep 2010) $ + * + */ +/* + ***************************************************************************** + * + * Copyright (c) 2011, Advanced Micro Devices, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of Advanced Micro Devices, Inc. nor the names of + * its contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL ADVANCED MICRO DEVICES, INC. BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * *************************************************************************** + * + */ + +/*---------------------------------------------------------------------------------------- + * M O D U L E S U S E D + *---------------------------------------------------------------------------------------- + */ +#include "AGESA.h" +#include "Ids.h" +#include "Gnb.h" +#include "GnbPcie.h" +#include GNB_MODULE_DEFINITIONS (GnbCommonLib) +#include GNB_MODULE_DEFINITIONS (GnbPcieInitLibV1) +#include "Filecode.h" +#define FILECODE PROC_GNB_MODULES_GNBPCIEINITLIBV1_PCIEASPMEXITLATENCY_FILECODE +/*---------------------------------------------------------------------------------------- + * D E F I N I T I O N S A N D M A C R O S + *---------------------------------------------------------------------------------------- + */ + + +/*---------------------------------------------------------------------------------------- + * T Y P E D E F S A N D S T R U C T U R E S + *---------------------------------------------------------------------------------------- + */ + +typedef struct { + GNB_PCI_SCAN_DATA ScanData; + PCIe_ASPM_LATENCY_INFO *AspmLatencyInfo; + PCI_ADDR DownstreamPort; + UINT8 LinkCount; +} PCIE_EXIT_LATENCY_DATA; + +/*---------------------------------------------------------------------------------------- + * P R O T O T Y P E S O F L O C A L F U N C T I O N S + *---------------------------------------------------------------------------------------- + */ + +SCAN_STATUS +PcieAspmGetMaxExitLatencyCallback ( + IN PCI_ADDR Device, + IN OUT GNB_PCI_SCAN_DATA *ScanData + ); + +/*----------------------------------------------------------------------------------------*/ +/** + * Determine ASPM L-state maximum exit latency for PCIe segment + * + * Scan through all link in segment to determine maxim exit latency requirement by EPs. + * + * @param[in] DownstreamPort PCI address of PCIe port + * @param[out] AspmLatencyInfo Latency info + * @param[in] StdHeader Standard configuration header + * + */ + +VOID +PcieAspmGetMaxExitLatency ( + IN PCI_ADDR DownstreamPort, + OUT PCIe_ASPM_LATENCY_INFO *AspmLatencyInfo, + IN AMD_CONFIG_PARAMS *StdHeader + ) +{ + PCIE_EXIT_LATENCY_DATA PcieExitLatencyData; + PcieExitLatencyData.AspmLatencyInfo = AspmLatencyInfo; + PcieExitLatencyData.ScanData.StdHeader = StdHeader; + PcieExitLatencyData.LinkCount = 0; + PcieExitLatencyData.ScanData.GnbScanCallback = PcieAspmGetMaxExitLatencyCallback; + GnbLibPciScan (DownstreamPort, DownstreamPort, &PcieExitLatencyData.ScanData); +} + +/*----------------------------------------------------------------------------------------*/ +/** + * Evaluate device + * + * + * + * @param[in] Device PCI Address + * @param[in,out] ScanData Scan configuration data + * @retval Scan Status of 0 + */ + +SCAN_STATUS +PcieAspmGetMaxExitLatencyCallback ( + IN PCI_ADDR Device, + IN OUT GNB_PCI_SCAN_DATA *ScanData + ) +{ + SCAN_STATUS ScanStatus; + PCIE_EXIT_LATENCY_DATA *PcieExitLatencyData; + PCIE_DEVICE_TYPE DeviceType; + UINT32 Value; + UINT8 PcieCapPtr; + UINT8 L1AcceptableLatency; + + PcieExitLatencyData = (PCIE_EXIT_LATENCY_DATA*) ScanData; + ScanStatus = SCAN_SUCCESS; + DeviceType = GnbLibGetPcieDeviceType (Device, ScanData->StdHeader); + IDS_HDT_CONSOLE (GNB_TRACE, " PcieAspmGetMaxExitLatencyCallback for Device = %d:%d:%d\n", + Device.Address.Bus, + Device.Address.Device, + Device.Address.Function + ); + switch (DeviceType) { + case PcieDeviceRootComplex: + case PcieDeviceDownstreamPort: + PcieExitLatencyData->DownstreamPort = Device; + PcieExitLatencyData->LinkCount++; + GnbLibPciScanSecondaryBus (Device, &PcieExitLatencyData->ScanData); + PcieExitLatencyData->LinkCount--; + break; + case PcieDeviceUpstreamPort: + GnbLibPciScanSecondaryBus (Device, &PcieExitLatencyData->ScanData); + break; + case PcieDeviceEndPoint: + case PcieDeviceLegacyEndPoint: + PcieCapPtr = GnbLibFindPciCapability (Device.AddressValue, PCIE_CAP_ID, ScanData->StdHeader); + ASSERT (PcieCapPtr != 0); + GnbLibPciRead ( + Device.AddressValue | (PcieCapPtr + PCIE_LINK_CAP_REGISTER), + AccessWidth32, + &Value, + ScanData->StdHeader + ); + if ((Value & PCIE_ASPM_L1_SUPPORT_CAP) != 0) { + GnbLibPciRead ( + Device.AddressValue | (PcieCapPtr + PCIE_DEVICE_CAP_REGISTER), + AccessWidth32, + &Value, + ScanData->StdHeader + ); + L1AcceptableLatency = (UINT8) (1 << ((Value >> 9) & 0x7)); + if (PcieExitLatencyData->LinkCount > 1) { + L1AcceptableLatency = L1AcceptableLatency + PcieExitLatencyData->LinkCount; + } + if (PcieExitLatencyData->AspmLatencyInfo->MaxL1ExitLatency < L1AcceptableLatency) { + PcieExitLatencyData->AspmLatencyInfo->MaxL1ExitLatency = L1AcceptableLatency; + } + IDS_HDT_CONSOLE (PCIE_MISC, " Device max exit latency L1 - %d us\n", + L1AcceptableLatency + ); + } + break; + default: + break; + } + return SCAN_SUCCESS; +} + |