diff options
| author | Kapil Porwal <kapilporwal@google.com> | 2023-07-31 12:20:31 +0000 |
|---|---|---|
| committer | Jakub Czapiga <jacz@semihalf.com> | 2023-08-01 11:52:23 +0000 |
| commit | d88039cbfec7c46fd63d0f0bfe33ae2a231cb4a2 (patch) | |
| tree | 7bf762a7faada7eaaa5ca15cce763ba01e8f08d0 | |
| parent | b2e7fa515d7b3483141e25098bcb6ab1be7ffef4 (diff) | |
mb/google/rex/var/screebo: Restrict ASPM to L1 for SD controller
Restrict ASPM to L1 for SD controller to avoid AERs.
BUG=b:288830220
TEST=No PCIE AER on SD controller on Screebo.
w/o this CL -
```
~ # lspci -s 00:06.0 -vvv | grep -i aspm
LnkCap: Port #9, Speed 16GT/s, Width x4, ASPM L0s L1, Exit Latency L0s <4us, L1 <64us
ClockPM- Surprise- LLActRep+ BwNot+ ASPMOptComp+
LnkCtl: ASPM L1 Enabled; RCB 64 bytes, Disabled- CommClk+
L1SubCap: PCI-PM_L1.2+ PCI-PM_L1.1+ ASPM_L1.2+ ASPM_L1.1+ L1_PM_Substates+
L1SubCtl1: PCI-PM_L1.2+ PCI-PM_L1.1+ ASPM_L1.2+ ASPM_L1.1+
~ # lspci -s 02:00.0 -vvv | grep -i aspm
LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit Latency L0s unlimited, L1 <64us
ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp+
LnkCtl: ASPM L0s L1 Enabled; RCB 64 bytes, Disabled- CommClk+
L1SubCap: PCI-PM_L1.2+ PCI-PM_L1.1+ ASPM_L1.2+ ASPM_L1.1+ L1_PM_Substates+
L1SubCtl1: PCI-PM_L1.2- PCI-PM_L1.1- ASPM_L1.2- ASPM_L1.1-
~ # dmesg | grep -i -e "pci.*error"
[ 0.734597] pcieport 0000:00:06.1: AER: Corrected error received: 0000:02:00.0
[ 0.734882] rtsx_pci 0000:02:00.0: PCIe Bus Error: severity=Corrected, type=Data Link Layer, (Transmitter ID)
[ 0.735258] rtsx_pci 0000:02:00.0: device [10ec:522a] error status/mask=00001000/00006000
[ 0.736159] pcieport 0000:00:06.1: AER: Corrected error received: 0000:02:00.0
[ 1.520903] pcieport 0000:00:06.1: AER: Corrected error received: 0000:02:00.0
[ 1.531587] rtsx_pci 0000:02:00.0: PCIe Bus Error: severity=Corrected, type=Data Link Layer, (Transmitter ID)
[ 1.548894] rtsx_pci 0000:02:00.0: device [10ec:522a] error status/mask=00001000/00006000
[ 1.567490] pcieport 0000:00:06.1: AER: Multiple Corrected error received: 0000:02:00.0
```
w/ this CL -
```
~ # lspci -s 00:06.0 -vvv | grep -i aspm
LnkCap: Port #9, Speed 16GT/s, Width x4, ASPM L0s L1, Exit Latency L0s <4us, L1 <64us
ClockPM- Surprise- LLActRep+ BwNot+ ASPMOptComp+
LnkCtl: ASPM L1 Enabled; RCB 64 bytes, Disabled- CommClk+
L1SubCap: PCI-PM_L1.2+ PCI-PM_L1.1+ ASPM_L1.2+ ASPM_L1.1+ L1_PM_Substates+
L1SubCtl1: PCI-PM_L1.2+ PCI-PM_L1.1+ ASPM_L1.2+ ASPM_L1.1+
~ # lspci -s 02:00.0 -vvv | grep -i aspm
LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit Latency L0s unlimited, L1 <64us
ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp+
LnkCtl: ASPM L1 Enabled; RCB 64 bytes, Disabled- CommClk+
L1SubCap: PCI-PM_L1.2+ PCI-PM_L1.1+ ASPM_L1.2+ ASPM_L1.1+ L1_PM_Substates+
L1SubCtl1: PCI-PM_L1.2+ PCI-PM_L1.1+ ASPM_L1.2+ ASPM_L1.1+
~ # dmesg | grep -i -e "pci.*error"
```
Signed-off-by: Kapil Porwal <kapilporwal@google.com>
Change-Id: I05f02c46486be42286fe9bc4f4be17763bb12b79
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76829
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Jakub Czapiga <jacz@semihalf.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
| -rw-r--r-- | src/mainboard/google/rex/variants/screebo/overridetree.cb | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/mainboard/google/rex/variants/screebo/overridetree.cb b/src/mainboard/google/rex/variants/screebo/overridetree.cb index 67bc4f80f5..4567d5dfc3 100644 --- a/src/mainboard/google/rex/variants/screebo/overridetree.cb +++ b/src/mainboard/google/rex/variants/screebo/overridetree.cb @@ -238,6 +238,7 @@ chip soc/intel/meteorlake .clk_src = 7, .clk_req = 7, .flags = PCIE_RP_HOTPLUG | PCIE_RP_LTR | PCIE_RP_AER, + .pcie_rp_aspm = ASPM_L1, }" chip soc/intel/common/block/pcie/rtd3 register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_D03)" |