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author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-02-24 16:51:40 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-02-24 16:51:40 -0800 |
commit | 90ddb3f03418cce0d83c415c0c1d470cf524ba46 (patch) | |
tree | b61a296898b66941cb77819230fa4df2d975a5b5 /drivers/pci/controller/vmd.c | |
parent | 8cbd92339db08b19b93d1637e5799ff2a8dddfd2 (diff) | |
parent | 3eb5d0f26f4ea604e83ca499a72c0d33638f4765 (diff) | |
download | linux-90ddb3f03418cce0d83c415c0c1d470cf524ba46.tar.gz linux-90ddb3f03418cce0d83c415c0c1d470cf524ba46.tar.bz2 linux-90ddb3f03418cce0d83c415c0c1d470cf524ba46.zip |
Merge tag 'pci-v6.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
Pull PCI updates from Bjorn Helgaas:
"Enumeration:
- Rework portdrv shutdown so it disables interrupts but doesn't
disable bus mastering, which leads to hangs on Loongson LS7A
- Add mechanism to prevent Max_Read_Request_Size (MRRS) increases,
again to avoid hardware issues on Loongson LS7A (and likely other
devices based on DesignWare IP)
- Ignore devices with a firmware (DT or ACPI) node that says the
device is disabled
Resource management:
- Distribute spare resources to unconfigured hotplug bridges at
boot-time (not just when hot-adding such a bridge), which makes
hot-adding devices to docks work better. Tried this in v6.1 but had
to revert for regressions, so try again
- Fix root bus issue that dropped resources that happened to end
at 0, e.g., [bus 00]
PCI device hotplug:
- Remove device locking when marking device as disconnected so this
doesn't have to wait for concurrent driver bind/unbind to complete
- Quirk more Qualcomm bridges that don't fully implement the PCIe
Slot Status 'Command Completed' bit
Power management:
- Account for _S0W of the target bridge in acpi_pci_bridge_d3() so we
don't miss hot-add notifications for USB4 docks, Thunderbolt, etc
Reset:
- Observe delay after reset, e.g., resuming from system sleep,
regardless of whether a bridge can suspend to D3cold at runtime
- Wait for secondary bus to become ready after a bridge reset
Virtualization:
- Avoid FLR on some AMD FCH AHCI adapters where it doesn't work
- Allow independent IOMMU groups for some Wangxun NICs that prevent
peer-to-peer transactions but don't advertise an ACS Capability
Error handling:
- Configure End-to-End-CRC (ECRC) only if Linux owns the AER
Capability
- Remove redundant Device Control Error Reporting Enable in the AER
service driver since this is already done for all devices during
enumeration
ASPM:
- Add pci_enable_link_state() interface to allow drivers to enable
ASPM link state
Endpoint framework:
- Move dra7xx and tegra194 linkup processing from hard IRQ to
threaded IRQ handler
- Add a separate lock for endpoint controller list of endpoint
function drivers to prevent deadlock in callbacks
- Pass events from endpoint controller to endpoint function drivers
via callbacks instead of notifiers
Synopsys DesignWare eDMA controller driver (acked by Vinod):
- Fix CPU vs PCI address issues
- Fix source vs destination address issues
- Fix issues with interleaved transfer semantics
- Fix channel count initialization issue (issue still exists in
several other drivers)
- Clean up and improve debugfs usage so it will work on platforms
with several eDMA devices
Baikal T-1 PCIe controller driver:
- Set a 64-bit DMA mask
Freescale i.MX6 PCIe controller driver:
- Add i.MX8MM, i.MX8MQ, i.MX8MP endpoint mode DT binding and driver
support
Intel VMD host bridge driver:
- Add quirk to configure PCIe ASPM and LTR. This is normally done by
BIOS, and will be for future products
Marvell MVEBU PCIe controller driver:
- Mark this driver as broken in Kconfig since bugs prevent its daily
usage
MediaTek MT7621 PCIe controller driver:
- Delay PHY port initialization to improve boot reliability for ZBT
WE1326, ZBT WF3526-P, and some Netgear models
Qualcomm PCIe controller driver:
- Add MSM8998 DT compatible string
- Unify MSM8996 and MSM8998 clock orderings
- Add SM8350 DT binding and driver support
- Add IPQ8074 Gen3 DT binding and driver support
- Correct qcom,perst-regs in DT binding
- Add qcom_pcie_host_deinit() so the PHY is powered off and
regulators and clocks are disabled on late host-init errors
Socionext UniPhier Pro5 controller driver:
- Clean up uniphier-ep reg, clocks, resets, and their names in DT
binding
Synopsys DesignWare PCIe controller driver:
- Restrict coherent DMA mask to 32 bits for MSI, but allow controller
drivers to set 64-bit streaming DMA mask
- Add eDMA engine support in both Root Port and Endpoint controllers
Miscellaneous:
- Remove MODULE_LICENSE from boolean drivers so they don't look like
modules so modprobe can complain about them"
* tag 'pci-v6.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (86 commits)
PCI: dwc: Add Root Port and Endpoint controller eDMA engine support
PCI: bt1: Set 64-bit DMA mask
PCI: dwc: Restrict only coherent DMA mask for MSI address allocation
dmaengine: dw-edma: Prepare dw_edma_probe() for builtin callers
dmaengine: dw-edma: Depend on DW_EDMA instead of selecting it
dmaengine: dw-edma: Add mem-mapped LL-entries support
PCI: Remove MODULE_LICENSE so boolean drivers don't look like modules
PCI: hv: Drop duplicate PCI_MSI dependency
PCI/P2PDMA: Annotate RCU dereference
PCI/sysfs: Constify struct kobj_type pci_slot_ktype
PCI: hotplug: Allow marking devices as disconnected during bind/unbind
PCI: pciehp: Add Qualcomm quirk for Command Completed erratum
PCI: qcom: Add IPQ8074 Gen3 port support
dt-bindings: PCI: qcom: Add IPQ8074 Gen3 port
dt-bindings: PCI: qcom: Sort compatibles alphabetically
PCI: qcom: Fix host-init error handling
PCI: qcom: Add SM8350 support
dt-bindings: PCI: qcom: Add SM8350
dt-bindings: PCI: qcom-ep: Correct qcom,perst-regs
dt-bindings: PCI: qcom: Unify MSM8996 and MSM8998 clock order
...
Diffstat (limited to 'drivers/pci/controller/vmd.c')
-rw-r--r-- | drivers/pci/controller/vmd.c | 97 |
1 files changed, 71 insertions, 26 deletions
diff --git a/drivers/pci/controller/vmd.c b/drivers/pci/controller/vmd.c index 769eedeb8802..990630ec57c6 100644 --- a/drivers/pci/controller/vmd.c +++ b/drivers/pci/controller/vmd.c @@ -66,8 +66,23 @@ enum vmd_features { * interrupt handling. */ VMD_FEAT_CAN_BYPASS_MSI_REMAP = (1 << 4), + + /* + * Enable ASPM on the PCIE root ports and set the default LTR of the + * storage devices on platforms where these values are not configured by + * BIOS. This is needed for laptops, which require these settings for + * proper power management of the SoC. + */ + VMD_FEAT_BIOS_PM_QUIRK = (1 << 5), }; +#define VMD_BIOS_PM_QUIRK_LTR 0x1003 /* 3145728 ns */ + +#define VMD_FEATS_CLIENT (VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP | \ + VMD_FEAT_HAS_BUS_RESTRICTIONS | \ + VMD_FEAT_OFFSET_FIRST_VECTOR | \ + VMD_FEAT_BIOS_PM_QUIRK) + static DEFINE_IDA(vmd_instance_ida); /* @@ -709,6 +724,46 @@ static void vmd_copy_host_bridge_flags(struct pci_host_bridge *root_bridge, vmd_bridge->native_dpc = root_bridge->native_dpc; } +/* + * Enable ASPM and LTR settings on devices that aren't configured by BIOS. + */ +static int vmd_pm_enable_quirk(struct pci_dev *pdev, void *userdata) +{ + unsigned long features = *(unsigned long *)userdata; + u16 ltr = VMD_BIOS_PM_QUIRK_LTR; + u32 ltr_reg; + int pos; + + if (!(features & VMD_FEAT_BIOS_PM_QUIRK)) + return 0; + + pci_enable_link_state(pdev, PCIE_LINK_STATE_ALL); + + pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_LTR); + if (!pos) + return 0; + + /* + * Skip if the max snoop LTR is non-zero, indicating BIOS has set it + * so the LTR quirk is not needed. + */ + pci_read_config_dword(pdev, pos + PCI_LTR_MAX_SNOOP_LAT, <r_reg); + if (!!(ltr_reg & (PCI_LTR_VALUE_MASK | PCI_LTR_SCALE_MASK))) + return 0; + + /* + * Set the default values to the maximum required by the platform to + * allow the deepest power management savings. Write as a DWORD where + * the lower word is the max snoop latency and the upper word is the + * max non-snoop latency. + */ + ltr_reg = (ltr << 16) | ltr; + pci_write_config_dword(pdev, pos + PCI_LTR_MAX_SNOOP_LAT, ltr_reg); + pci_info(pdev, "VMD: Default LTR value set by driver\n"); + + return 0; +} + static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features) { struct pci_sysdata *sd = &vmd->sysdata; @@ -881,6 +936,8 @@ static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features) pci_assign_unassigned_bus_resources(vmd->bus); + pci_walk_bus(vmd->bus, vmd_pm_enable_quirk, &features); + /* * VMD root buses are virtual and don't return true on pci_is_pcie() * and will fail pcie_bus_configure_settings() early. It can instead be @@ -1017,36 +1074,24 @@ static int vmd_resume(struct device *dev) static SIMPLE_DEV_PM_OPS(vmd_dev_pm_ops, vmd_suspend, vmd_resume); static const struct pci_device_id vmd_ids[] = { - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_VMD_201D), + {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_VMD_201D), .driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP,}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_VMD_28C0), + {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_VMD_28C0), .driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW | VMD_FEAT_HAS_BUS_RESTRICTIONS | VMD_FEAT_CAN_BYPASS_MSI_REMAP,}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x467f), - .driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP | - VMD_FEAT_HAS_BUS_RESTRICTIONS | - VMD_FEAT_OFFSET_FIRST_VECTOR,}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4c3d), - .driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP | - VMD_FEAT_HAS_BUS_RESTRICTIONS | - VMD_FEAT_OFFSET_FIRST_VECTOR,}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa77f), - .driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP | - VMD_FEAT_HAS_BUS_RESTRICTIONS | - VMD_FEAT_OFFSET_FIRST_VECTOR,}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7d0b), - .driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP | - VMD_FEAT_HAS_BUS_RESTRICTIONS | - VMD_FEAT_OFFSET_FIRST_VECTOR,}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xad0b), - .driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP | - VMD_FEAT_HAS_BUS_RESTRICTIONS | - VMD_FEAT_OFFSET_FIRST_VECTOR,}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_VMD_9A0B), - .driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP | - VMD_FEAT_HAS_BUS_RESTRICTIONS | - VMD_FEAT_OFFSET_FIRST_VECTOR,}, + {PCI_VDEVICE(INTEL, 0x467f), + .driver_data = VMD_FEATS_CLIENT,}, + {PCI_VDEVICE(INTEL, 0x4c3d), + .driver_data = VMD_FEATS_CLIENT,}, + {PCI_VDEVICE(INTEL, 0xa77f), + .driver_data = VMD_FEATS_CLIENT,}, + {PCI_VDEVICE(INTEL, 0x7d0b), + .driver_data = VMD_FEATS_CLIENT,}, + {PCI_VDEVICE(INTEL, 0xad0b), + .driver_data = VMD_FEATS_CLIENT,}, + {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_VMD_9A0B), + .driver_data = VMD_FEATS_CLIENT,}, {0,} }; MODULE_DEVICE_TABLE(pci, vmd_ids); |