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files)
Replace the #include of <linux/mod_devicetable.h> by the more specific
<linux/device-id/*.h> where applicable. For most cases the include
can be dropped completely, only a few drivers need one or two headers
added.
Acked-by: Danilo Krummrich <dakr@kernel.org>
Acked-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/1a3f2007c5c5dcf555c09a4035ce3ae8ef1b6c49.1782808461.git.u.kleine-koenig@baylibre.com
Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
Pull pci updates from Bjorn Helgaas:
"Enumeration:
- Remove MPS/MRRS Kconfig settings (CONFIG_PCIE_BUS_*) that worked
around a WiFi device defect; use a quirk or boot-time
"pci=pcie_bus_tune_*" kernel parameter instead (Bjorn Helgaas)
- Always lift 2.5GT/s restriction in PCIe failed link retraining to
avoid clamping a link to 2.5GT/s after hot-plug changes the device
(Maciej W. Rozycki)
- Request bus reassignment when not probe-only to fix an enumeration
regression on Marvell CN106XX and possibly other DT-based systems
(Ratheesh Kannoth)
- Fix procfs race between pci_proc_init() and pci_bus_add_device()
that resulted in 'proc_dir_entry ... already registered' warnings
and pointer corruption (Krzysztof Wilczyński)
- Fix sysfs race that causes 'duplicate filename' warnings and boot
panics by converting PCI resource files to static attributes
(Krzysztof Wilczyński)
- Expose sysfs 'resourceN_resize' attributes only on platforms with
PCI mmap (Krzysztof Wilczyński)
- Require CAP_SYS_ADMIN to write to sysfs 'resourceN_resize'
attributes (Krzysztof Wilczyński)
- Add security_locked_down(LOCKDOWN_PCI_ACCESS) to alpha PCI resource
mmap path to match the generic path (Krzysztof Wilczyński)
- Use kstrtobool() to parse the 'rom' attribute input to avoid the
unexpected behavior of enabling the ROM when writing '0' with no
trailing newline (Krzysztof Wilczyński)
Resource management:
- Improve resource claim logging for debuggability (Ilpo Järvinen)
- Clean up several uses of const parameters (Ilpo Järvinen)
- Check option ROM header signatures and lengths before accessing to
avoid page faults and alignment faults (Guixin Liu)
ASPM:
- Don't reconfigure ASPM when entering low-power D-state; only do it
when returning back to D0 (Carlos Bilbao)
Power management:
- During suspend, set power state to 'unknown' for all devices, not
just those with drivers (Lukas Wunner)
- Skip restoring Resizable BARs and VF Resizable BARs if device
doesn't respond to config reads, to avoid invalid array accesses
(Marco Nenciarini)
- Add pci_suspend_retains_context() so drivers can tell whether
devices retain internal state across suspend/resume, since some
platforms reset devices on suspend; use this in nvme to avoid
issues on Qcom RCs (Manivannan Sadhasivam)
Power control:
- Only to power on/off devices that actually support power control to
avoid poking at incompatible devices mentioned in DT (Manivannan
Sadhasivam)
Virtualization and resets:
- Log device readiness timeouts as errors, not warnings, because the
device is likely unusable in this case (Bjorn Helgaas)
- Wait for device readiness after soft reset (D3hot ->
D0uninitialized transition), when the device may respond with
Request Retry Status (RRS) if it needs more time to initialize
(Bjorn Helgaas)
- Drop unnecessary retries when restoring BARs because resets should
now already include all required delays (Lukas Wunner)
- Avoid FLR for MediaTek MT7925 WiFi, where FLR fails after a VM
terminates uncleanly (Jose Ignacio Tornos Martinez)
- Avoid SBR for Qualcomm WCN6855/WCN7850 WiFi, SDX62/SDX65 modems,
which seem not to support it correctly (Jose Ignacio Tornos
Martinez)
Peer-to-peer DMA:
- Prevent P2PDMA as well as CPU access to non-mappable BARs, e.g.,
s390 ISM BARs (Matt Evans)
- Add Intel QAT, DSA, IAA devices to whitelist (Lukas Wunner)
Endpoint framework:
- Add endpoint controller APIs for use by function drivers to
discover auxiliary blocks like DMA engines (Koichiro Den)
- Remember DesignWare eDMA engine base/size and expose them via the
EPC aux-resource API (Koichiro Den)
- Add endpoint embedded doorbell fallback, used if MSI allocation
fails (Koichiro Den)
- Validate BAR index and remove dead BAR read in endpoint doorbell
test (Carlos Bilbao)
- Unwind MSI/MSI-X vectors if NTB initialization fails part-way
through (Koichiro Den)
- Cache sleepable pci_irq_vector() value at ISR setup to avoid
calling it from hardirq context (Koichiro Den)
- Call sleepable pci_epc_raise_irq() from a work item instead of
atomic context, e.g., when setting bits in NTB peer doorbells in
the ntb_peer_db_set() path (Koichiro Den)
- Report 0-based vNTB doorbell vector to account for link event 0 and
historically skipped slot 1 (Koichiro Den)
- Prevent configfs writes to vNTB db_count and other values that are
already in use after EPC attach (Koichiro Den)
- Account for vNTB db_valid reserved slots (link event 0 and
historically skipped slot 1) so they don't appear as valid
doorbells (Koichiro Den)
- Implement vNTB .db_vector_count()/mask() for doorbells so clients
can use multiple vectors and avoid thundering herds (Koichiro Den)
- Report 0-based NTB doorbell vector to account for link event 0 and
historically skipped slot 1 (Koichiro Den)
- Fix doorbell bitmask and IRQ vector handling to clear only
specified bits, use the correct vector for non-contiguous Linux IRQ
numbers, and validate incoming vectors (Koichiro Den)
- Implement NTB .db_vector_count()/mask() for doorbells so clients
can use multiple vectors (Koichiro Den)
Native PCIe controller infrastructure:
- Add pci_host_common_link_train_delay() for the mandatory delay
after > 5GT/s Link training completes and use it for cadence HPA,
j721e, LGA; dwc; aardvark, mediatek-gen3, rzg3s (Hans Zhang)
- Protect root bus removal with rescan lock in altera, brcmstb,
cadence, dwc, iproc, mediatek, plda, rockchip to prevent
use-after-free or crashes when racing with sysfs rescan or hotplug
(Hans Zhang)
- Add pci_host_common_parse_ports() for use by any native driver to
parse Root Port properties (per-Link features like width, speed,
PHY, power and reset control, etc should be described in Root Port
stanzas, not the host bridge; currently only reset GPIOs
implemented) (Sherry Sun)
New native PCIe controller drivers:
- Add DT binding and driver for UltraRISC DP1000 PCIe controller
(Xincheng Zhang, Jia Wang)
Altera PCIe controller driver:
- Do not dispose of the parent IRQ mapping, which belongs to the
parent interrupt controller (Mahesh Vaidya)
- Fix chained IRQ handler ordering issue and resource leaks on probe
failure (Mahesh Vaidya)
AMD MDB PCIe controller driver:
- Assert PERST# on shutdown so any connected Endpoints are held in
reset during shutdown (Sai Krishna Musham)
Amlogic Meson PCIe controller driver:
- Propagate devm_add_action_or_reset() failure to fix probe error
path (Shuvam Pandey)
- Add .remove() callback to deinitialize the host bridge and power
off the PHY (Shuvam Pandey)
Broadcom iProc PCIe controller driver:
- Restore .map_irq() assignment; its removal broke INTx on the iproc
platform bus driver (Mark Tomlinson)
Broadcom STB PCIe controller driver:
- No change, but products using certain WiFi devices may be affected
by removal of CONFIG_PCIE_BUS_* (see above)
Freescale i.MX6 PCIe controller driver:
- Move IMX6SX_GPR12_PCIE_TEST_POWERDOWN handling into the core reset
functions (Richard Zhu)
- Assert PERST# before enabling regulators to ensure that even if
power is enabled, endpoint stays inactive until REFCLK is stable
(Sherry Sun)
- Parse reset properties in Root Port nodes (falling back to host
bridge) to help support Key E connectors and the pwrctrl framework
(Sherry Sun)
- Configure i.MX95 REF_USE_PAD before PHY reset (Richard Zhu)
- Assert i.MX95 ref_clk_en after reference clock stabilizes (Richard
Zhu)
- Integrate new pwrctrl API for DTs with Root Port-level power
supplies (Sherry Sun)
Intel Gateway PCIe controller driver:
- Enable clock before PHY init for correct ordering (Florian Eckert)
- Add .start_link() callback so the driver works again (Florian
Eckert)
- Stop overwriting the ATU base address discovered by
dw_pcie_get_resources() (Florian Eckert)
- Add DT 'atu' region since this is hardware-specific, and fall back
to driver default if lacking (Florian Eckert)
Loongson PCIe controller driver:
- Ignore downstream devices only on internal bridges to avoid
Loongson hardware issue (Rong Zhang)
- Quirk old Loongson-3C6000 bridges that advertise incorrect
supported link speeds (Ziyao Li)
Marvell MVEBU PCIe controller driver:
- Use fixed-width interrupt masks to avoid truncation in 64-bit
builds (Rosen Penev)
MediaTek PCIe controller driver:
- Use FIELD_PREP() to fix incorrect operator precedence in
PCIE_FTS_NUM_L0 (Li RongQing)
- Fix IRQ domain leak when port fails to enable (Manivannan
Sadhasivam)
- Use actual physical address for MSI message address instead of
virt_to_phys() (Manivannan Sadhasivam)
- Add EcoNet EN7528 to DT binding (Caleb James DeLisle)
MediaTek PCIe Gen3 controller driver:
- Deassert PCIE_PHY_RSTB so REFCLK is stable for at least 100ms
(PCIE_T_PVPERL_MS) before deasserting PERST# (Jian Yang)
- Add .shutdown() to assert PERST# before powering down device (Jian
Yang)
- Do full device power down on removal, including asserting PERST#,
when removing driver (Chen-Yu Tsai)
- Fix a 'failed to create pwrctrl devices' error message that was
inadvertently skipped (Chen-Yu Tsai)
NVIDIA Tegra194 PCIe controller driver:
- Program the DesignWare PORT_AFR L1 entrance latency based on the
'aspm-l1-entry-delay-ns' DT property (Manikanta Maddireddy)
Qualcomm PCIe controller driver:
- Add Eliza SoC compatible in DT binding (Krishna Chaitanya Chundru)
- Set max OPP during resume so DBI register accesses don't fail with
NoC errors (Qiang Yu)
- Add pci_host_common_d3cold_possible() to determine whether
downstream devices are already in D3hot and wakeup-enabled devices
are capable of generating PME from D3cold (Krishna Chaitanya
Chundru)
- Add .get_ltssm() callback to get the LTSSM status without DBI,
since DBI may be inaccessible after PME_Turn_Off (Krishna Chaitanya
Chundru)
- Power down PHY via PARF_PHY_CTRL before disabling rails/clocks to
avoid power leakage (Krishna Chaitanya Chundru)
- Decide whether suspend should put the link in L2 and power down
using pci_host_common_d3cold_possible() instead of checking whether
ASPM L1 is enabled (Krishna Chaitanya Chundru)
- Add qcom D3cold support to tear down interconnect bandwidth and OPP
votes (Krishna Chaitanya Chundru)
- Handle unsupported mixed PERST#/PHY DT configurations, e.g., PHY in
RP node while PERST# is in the RC node, but warn about the DT issue
(Qiang Yu)
- Program T_POWER_ON based on DT 't-power-on-us' property in case
hardware advertises incorrect values (Krishna Chaitanya Chundru)
- Disable ASPM L0s for SA8775P (Shawn Guo)
- Initialize DWC MSI lock for firmware-managed ECAM hosts, which
don't use the dw_pcie_host_init() path that initializes the lock
(Yadu M G)
Renesas RZ/G3S PCIe controller driver:
- Add RZ/V2N DT support (Lad Prabhakar)
SOPHGO PCIe controller driver:
- Add 'dma-coherent' DT property for sg2042-pcie driver (Han Gao)
Synopsys DesignWare PCIe controller driver:
- Apply ECRC TLP Digest workaround for all DesignWare cores prior to
5.10a, not just 4.90a and 5.00a (Manikanta Maddireddy)
- Use common struct dw_pcie 'mode' rather than duplicating it in
artpec6, dra7xx, dwc-pcie, and keembay driver structs (Hans Zhang)
- Use DEFINE_SHOW_ATTRIBUTE for ltssm_status debugfs to reduce
boilerplate and fix a seq_file memory leak by including a
.release() callback (Hans Zhang)
- Fix a signedness bug in fault injection test code (Dan Carpenter)
- Avoid NULL pointer dereference when tearing down debugfs for
controller that lacks RAS DES capability (Shuvam Pandey)
MicroSemi Switchtec management driver:
- Add Gen6 Device IDs (Ben Reed)
Miscellaneous:
- Remove unused gpio.h include from amd-mdb, designware-plat, fu740,
visconti drivers (Andy Shevchenko)
- Fix typos in documentation (josh ziegler)
- Use FIELD_MODIFY() instead of open-coding it (Hans Zhang)"
* tag 'pci-v7.2-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (168 commits)
PCI/sysfs: Use kstrtobool() to parse the ROM attribute input
PCI/sysfs: Limit BAR resize attribute scope to platforms with PCI mmap
PCI/sysfs: Remove pci_create_legacy_files() and pci_sysfs_init()
PCI/sysfs: Convert legacy I/O and memory attributes to static definitions
PCI/sysfs: Add __weak pci_legacy_has_sparse() helper
alpha/PCI: Compute legacy size in pci_mmap_legacy_page_range()
PCI: Add macros for legacy I/O and memory address space sizes
PCI/sysfs: Remove pci_{create,remove}_sysfs_dev_files()
alpha/PCI: Convert resource files to static attributes
alpha/PCI: Add static PCI resource attribute macros
alpha/PCI: Remove WARN from __pci_mmap_fits() and __legacy_mmap_fits()
alpha/PCI: Fix __pci_mmap_fits() overflow for zero-length BARs
alpha/PCI: Use PCI resource accessor macros
alpha/PCI: Use BAR index in sysfs attr->private instead of resource pointer
alpha/PCI: Add security_locked_down() check to pci_mmap_resource()
PCI/sysfs: Limit pci_sysfs_init() late_initcall compile scope
PCI/sysfs: Add stubs for pci_{create,remove}_sysfs_dev_files()
PCI/sysfs: Warn about BAR resize failure in __resource_resize_store()
PCI/sysfs: Convert PCI resource files to static attributes
PCI/proc: Fix race between pci_proc_init() and pci_bus_add_device()
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull MSI irq fix from Ingo Molnar:
- Revert a change that added a bad iounmap(NULL) call
to the MSI IRQ support code (Yuanhe Shu)
* tag 'irq-msi-2026-06-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
Revert "PCI/MSI: Unmap MSI-X region on error"
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- Fix typos in documentation (josh ziegler)
- Use FIELD_MODIFY() instead of open-coding it (Hans Zhang)
* pci/misc:
PCI: Use FIELD_MODIFY() instead of open-coding it
Documentation: PCI: Fix typos
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- Remove unused gpio.h include from amd-mdb, designware-plat, fu740,
visconti drivers (Andy Shevchenko)
* pci/controller/misc:
PCI: visconti: Drop unused include
PCI: fu740: Drop unused include
PCI: designware-plat: Drop unused include
PCI: amd-mdb: Use the right GPIO header
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- Add common TLP Type macros (MRd/Wr, IORd/Wr, CfgRd/Wr 0, CfgRd/Wr 1, Msg)
and use them in aspeed, cadence, dwc, mediatek, tegra drivers (Hans
Zhang)
* pci/controller/tlp_macros:
PCI: cadence: Use common TLP type macros
PCI: dwc: Replace ATU type macros with common TLP type macros
PCI: Add common TLP type macros and convert aspeed/mediatek
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- Protect root bus removal with rescan lock in altera, brcmstb, cadence,
dwc, iproc, mediatek, plda, rockchip to prevent use-after-free or crashes
when racing with sysfs rescan or hotplug (Hans Zhang)
* pci/controller/rescan_lock:
PCI: rockchip: Protect root bus removal with rescan lock
PCI: plda: Protect root bus removal with rescan lock
PCI: mediatek: Protect root bus removal with rescan lock
PCI: iproc: Protect root bus removal with rescan lock
PCI: dwc: Protect root bus removal with rescan lock
PCI: cadence: Protect root bus removal with rescan lock
PCI: brcmstb: Protect root bus removal with rescan lock
PCI: altera: Protect root bus removal with rescan lock
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- Add pci_host_common_link_train_delay() for the mandatory delay after
> 5GT/s Link training completes and use it for cadence HPA, j721e, LGA;
dwc; aardvark, mediatek-gen3, rzg3s (Hans Zhang)
* pci/controller/link_train_delay:
PCI: rzg3s-host: Use common pci_host_common_link_train_delay() helper
PCI: mediatek-gen3: Add 100 ms delay after link up
PCI: aardvark: Add 100 ms delay after link training
PCI: dwc: Use common pci_host_common_link_train_delay() helper
PCI: cadence-hpa: Add post-link delay
PCI: cadence: Add post-link delay for LGA and j721e glue driver
PCI: Add pci_host_common_link_train_delay() helper
# Conflicts:
# drivers/pci/controller/pci-host-common.h
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- Remove unused LIST_HEAD(res) (Lad Prabhakar)
* pci/controller/rcar-host:
PCI: rcar-host: Remove unused LIST_HEAD(res)
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- Use fixed-width interrupt masks to avoid truncation in 64-bit builds
(Rosen Penev)
* pci/controller/mvebu:
PCI: mvebu: Use fixed-width interrupt masks to avoid truncation in 64-bit builds
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- Deassert PCIE_PHY_RSTB so REFCLK is stable for at least 100ms
(PCIE_T_PVPERL_MS) before deasserting PERST# (Jian Yang)
- Add .shutdown() to assert PERST# before powering down device (Jian Yang)
- Do full device power down on removal, including asserting PERST#, when
removing driver (Chen-Yu Tsai)
- Fix a 'failed to create pwrctrl devices' error message that was
inadvertently skipped (Chen-Yu Tsai)
* pci/controller/mediatek-gen3:
PCI: mediatek-gen3: Fix incorrectly skipped pwrctrl error message
PCI: mediatek-gen3: Do full device power down on removal
PCI: mediatek-gen3: Add a .shutdown() callback to control PERST# signal
PCI: mediatek-gen3: Fix PERST# control timing during system startup
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- Use FIELD_PREP() to fix incorrect operator precedence in PCIE_FTS_NUM_L0
(Li RongQing)
- Fix IRQ domain leak when port fails to enable (Manivannan Sadhasivam)
- Use actual physical address for MSI message address instead of
virt_to_phys() (Manivannan Sadhasivam)
- Add EcoNet EN7528 to DT binding (Caleb James DeLisle)
* pci/controller/mediatek:
dt-bindings: PCI: mediatek: Add support for EcoNet EN7528
PCI: mediatek: Use actual physical address instead of virt_to_phys()
PCI: mediatek: Fix IRQ domain leak when port fails to enable
PCI: mediatek: Fix operator precedence in PCIE_FTS_NUM_L0 macro
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- Ignore downstream devices only on internal bridges to avoid Loongson
hardware issue (Rong Zhang)
- Quirk old Loongson-3C6000 bridges that advertise incorrect supported link
speeds (Ziyao Li)
* pci/controller/loongson:
PCI: loongson: Override PCIe bridge supported speeds for Loongson-3C6000 series
PCI: loongson: Do not ignore downstream devices on external bridges
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- Restore .map_irq() assignment that broke INTx on the iproc platform bus
driver (Mark Tomlinson)
* pci/controller/iproc-bcma:
PCI: iproc: Restore .map_irq() for the platform bus driver
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- Add UltraRISC DP1000 PCIe controller DT binding and driver (Jia Wang)
* pci/controller/dwc-ultrarisc:
PCI: ultrarisc: Add UltraRISC DP1000 PCIe Root Complex driver
dt-bindings: PCI: Add UltraRISC DP1000 PCIe controller
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- Program the DesignWare PORT_AFR L1 entrance latency based on the
'aspm-l1-entry-delay-ns' DT property (Manikanta Maddireddy)
* pci/controller/dwc-tegra194:
PCI: tegra194: Use aspm-l1-entry-delay-ns DT property for L1 entrance latency
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- Set max OPP during resume so DBI register accesses don't fail with NoC
errors (Qiang Yu)
- Add pci_host_common_d3cold_possible() to determine whether downstream
devices are already in D3hot and wakeup-enabled devices are capable of
generating PME from D3cold (Krishna Chaitanya Chundru)
- Add a .get_ltssm() callback to get the LTSSM status without DBI, since
DBI may be inaccessible after PME_Turn_Off (Krishna Chaitanya Chundru)
- Power down PHY via PARF_PHY_CTRL before disabling rails/clocks to avoid
power leakage (Krishna Chaitanya Chundru)
- Decide whether suspend should put the link in L2 and power down using
pci_host_common_d3cold_possible() instead of checking whether ASPM L1 is
enabled (Krishna Chaitanya Chundru)
- Add qcom D3cold support to tear down interconnect bandwidth and OPP votes
(Krishna Chaitanya Chundru)
- Handle unsupported mixed PERST#/PHY DT configurations, e.g., PHY in RP
node while PERST# is in the RC node, but warn about the DT issue (Qiang
Yu)
- Add pcie_encode_t_power_on() to encode L1SS T_POWER_ON fields (Krishna
Chaitanya Chundru)
- Add dw_pcie_program_t_power_on() to program T_POWER_ON (Krishna Chaitanya
Chundru)
- Program qcom T_POWER_ON based on DT 't-power-on-us' property in case
hardware advertises incorrect values (Krishna Chaitanya Chundru)
- Disable ASPM L0s for SA8775P (Shawn Guo)
- Initialize DWC MSI lock for firmware-managed ECAM hosts, which don't use
the dw_pcie_host_init() path that initializes the lock (Yadu M G)
* pci/controller/dwc-qcom:
PCI: qcom: Initialize DWC MSI lock for firmware-managed ECAM hosts
PCI: qcom: Disable ASPM L0s for SA8775P
PCI: qcom: Program T_POWER_ON
PCI: dwc: Add dw_pcie_program_t_power_on() to program T_POWER_ON
PCI/ASPM: Add pcie_encode_t_power_on() helper to encode L1SS T_POWER_ON fields
PCI: qcom: Handle mixed PERST#/PHY DT configuration
PCI: qcom: Add D3cold support
PCI: dwc: Use common D3cold eligibility helper in suspend path
PCI: qcom: Power down PHY via PARF_PHY_CTRL before disabling rails/clocks
PCI: qcom: Add .get_ltssm() callback to query LTSSM status
PCI: host-common: Add pci_host_common_d3cold_possible() helper
PCI: qcom: Set max OPP before DBI access during resume
# Conflicts:
# drivers/pci/controller/pci-host-common.c
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- Propagate devm_add_action_or_reset() failure to fix probe error path
(Shuvam Pandey)
- Add a .remove() callback to deinitialize the host bridge and power off
the PHY (Shuvam Pandey)
* pci/controller/dwc-meson:
PCI: meson: Add missing remove callback
PCI: meson: Propagate devm_add_action_or_reset() failure
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- Enable clock before PHY init for correct ordering (Florian Eckert)
- Add .start_link() callback so the driver works again (Florian Eckert)
- Stop overwriting the ATU base address discovered by
dw_pcie_get_resources() (Florian Eckert)
- Add DT 'atu' region since this is hardware-specific, and fall back to
driver default if lacking (Florian Eckert)
* pci/controller/dwc-intel-gw:
dt-bindings: PCI: intel,lgm-pcie: Add 'atu' resource
PCI: intel-gw: Fix ATU base address setup and add optional DT 'atu' region
PCI: intel-gw: Add .start_link() callback
PCI: intel-gw: Enable clock before PHY init
PCI: intel-gw: Move interrupt enable to own function
PCI: intel-gw: Remove unused PCIE_APP_INTX_OFST definition
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- Move IMX6SX_GPR12_PCIE_TEST_POWERDOWN handling into the core reset
functions (Richard Zhu)
- Add pci_host_common_parse_ports() for use by any native driver to parse
Root Port properties (currently only reset GPIOs) (Sherry Sun)
- Assert PERST# before enabling regulators to ensure that even if power is
enabled, endpoint stays inactive until REFCLK is stable (Sherry Sun)
- Parse reset properties in Root Port nodes (falling back to host bridge)
to help support Key E connectors and the pwrctrl framework (Sherry Sun)
- Configure i.MX95 REF_USE_PAD before PHY reset (Richard Zhu)
- Assert i.MX95 ref_clk_en after reference clock stabilizes (Richard Zhu)
- Integrate new pwrctrl API for DTs with Root Port-level power supplies
(Sherry Sun)
* pci/controller/dwc-imx6:
PCI: imx6: Integrate new pwrctrl API
PCI: imx6: Assert ref_clk_en after reference clock stabilizes on i.MX95
PCI: imx6: Configure REF_USE_PAD before PHY reset for i.MX95
PCI: imx6: Parse 'reset-gpios' in Root Port nodes
PCI: imx6: Assert PERST# before enabling regulators
PCI: host-generic: Add common helpers for parsing Root Port properties
dt-bindings: PCI: fsl,imx6q-pcie: Add reset GPIO in Root Port node
PCI: imx6: Fix IMX6SX_GPR12_PCIE_TEST_POWERDOWN handling
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- Assert PERST# on shutdown so any connected Endpoints are held in reset
during shutdown (Sai Krishna Musham)
* pci/controller/dwc-amd-mdb:
PCI: amd-mdb: Assert PERST# on shutdown
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- Apply ECRC TLP Digest workaround for all DesignWare cores prior to 5.10a,
not just 4.90a and 5.00a (Manikanta Maddireddy)
- Use common struct dw_pcie 'mode' rather than duplicating it in artpec6,
dra7xx, dwc-pcie, and keembay driver structs (Hans Zhang)
- Use DEFINE_SHOW_ATTRIBUTE for ltssm_status debugfs to reduce boilerplate
and fix a seq_file memory leak by including a .release() callback (Hans
Zhang)
- Fix a signedness bug in fault injection test code (Dan Carpenter)
- Avoid NULL pointer dereference when tearing down debugfs for controller
that lacks RAS DES capability (Shuvam Pandey)
* pci/controller/dwc:
PCI: dwc: Avoid dwc_pcie_rasdes_debugfs_deinit() NULL dereference when no RAS DES capability
PCI: dwc: Fix signedness bug in fault injection test code
PCI: dwc: Use DEFINE_SHOW_ATTRIBUTE for ltssm_status debugfs
PCI: keembay: Use common mode field in struct dw_pcie
PCI: dwc: Use common mode field in struct dw_pcie
PCI: artpec6: Use common mode field in struct dw_pcie
PCI: dra7xx: Use common mode field in struct dw_pcie
PCI: dwc: Apply ECRC workaround for DesignWare cores prior to 5.10a
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- Do not dispose of the parent IRQ mapping, which belongs to the parent
interrupt controller (Mahesh Vaidya)
- Fix chained IRQ handler ordering issue and resource leaks on probe
failure (Mahesh Vaidya)
* pci/controller/altera:
PCI: altera: Fix resource leaks on probe failure
PCI: altera: Do not dispose parent IRQ mapping
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- Request bus reassignment when not probe-only to fix an enumeration
regression on Marvell CN106XX and possibly other DT-based systems
(Ratheesh Kannoth)
* pci/controller/host-common:
PCI: host-common: Request bus reassignment when not probe-only
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- Add endpoint controller APIs for use by function drivers to discover
auxiliary blocks like DMA engines (Koichiro Den)
- Remember DesignWare eDMA engine base/size and expose them via the EPC
aux-resource API (Koichiro Den)
- Refactor endpoint doorbell allocation to allow non-MSI doorbells
(Koichiro Den)
- Add endpoint embedded doorbell fallback, used if MSI allocation fails
(Koichiro Den)
- Validate BAR index and remove dead BAR read in endpoint doorbell test
(Carlos Bilbao)
- Unwind MSI/MSI-X vectors if NTB initialization fails part-way through
(Koichiro Den)
- Cache sleepable pci_irq_vector() value at ISR setup to avoid calling it
from hardirq context (Koichiro Den)
- Validate doorbell count when configuring NTB and vNTB doorbells
(Manivannan Sadhasivam)
- Call sleepable pci_epc_raise_irq() from a work item instead of atomic
context, e.g., when setting bits in NTB peer doorbells in the
ntb_peer_db_set() path (Koichiro Den)
- Report 0-based vNTB doorbell vector to account for link event 0 and
historically skipped slot 1 (Koichiro Den)
- Reject unusable vNTB doorbell counts, e.g., if they don't allow space for
link event 0 and historically skipped slot 1 (Koichiro Den)
- Prevent configfs writes to vNTB db_count and other values that are
already in use after EPC attach (Koichiro Den)
- Account for vNTB db_valid reserved slots (link event 0 and historically
skipped slot 1) so they don't appear as valid doorbells (Koichiro Den)
- Implement vNTB .db_vector_count()/mask() for doorbells so clients can use
multiple vectors and avoid thundering herds (Koichiro Den)
- Report 0-based NTB doorbell vector to account for link event 0 and
historically skipped slot 1 (Koichiro Den)
- Fix doorbell bitmask and IRQ vector handling to clear only specified
bits, use the correct vector for non-contiguous Linux IRQ numbers, and
validate incoming vectors (Koichiro Den)
- Implement NTB .db_vector_count()/mask() for doorbells so clients can use
multiple vectors (Koichiro Den)
* pci/endpoint:
NTB: epf: Implement .db_vector_count()/mask() for doorbells
NTB: epf: Fix doorbell bitmask and IRQ vector handling
NTB: epf: Report 0-based doorbell vector via ntb_db_event()
NTB: epf: Make db_valid_mask cover only real doorbell bits
NTB: epf: Document legacy doorbell slot offset in ntb_epf_peer_db_set()
PCI: endpoint: pci-epf-vntb: Implement .db_vector_count()/mask() for doorbells
PCI: endpoint: pci-epf-vntb: Exclude reserved slots from db_valid_mask
PCI: endpoint: pci-epf-vntb: Guard configfs writes after EPC attach
PCI: endpoint: pci-epf-vntb: Reject unusable doorbell counts
PCI: endpoint: pci-epf-vntb: Report 0-based doorbell vector via ntb_db_event()
PCI: endpoint: pci-epf-vntb: Defer pci_epc_raise_irq() out of atomic context
PCI: endpoint: pci-epf-vntb: Document legacy MSI doorbell offset
PCI: endpoint: pci-epf-ntb: Add check to detect 'db_count' value of 0
PCI: endpoint: pci-epf-vntb: Add check to detect 'db_count' value of 0
NTB: epf: Avoid calling pci_irq_vector() from hardirq context
NTB: epf: Fix request_irq() unwind in ntb_epf_init_isr()
misc: pci_endpoint_test: Remove dead BAR read before doorbell trigger
misc: pci_endpoint_test: Validate BAR index in doorbell test
PCI: endpoint: pci-ep-msi: Add embedded doorbell fallback
PCI: endpoint: pci-epf-test: Reuse pre-exposed doorbell targets
PCI: endpoint: pci-epf-vntb: Reuse pre-exposed doorbells and IRQ flags
PCI: endpoint: pci-ep-msi: Refactor doorbell allocation for new backends
PCI: dwc: ep: Expose integrated eDMA resources via EPC aux-resource API
PCI: dwc: Record integrated eDMA register window
PCI: endpoint: Add auxiliary resource query API
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- Add Gen6 Device IDs to the switchtec driver (Ben Reed)
* pci/switchtec:
PCI: switchtec: Add Gen6 Device IDs
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- Avoid FLR for MediaTek MT7925 WiFi, where FLR fails after a VM terminates
uncleanly (Jose Ignacio Tornos Martinez)
- Avoid SBR for Qualcomm WCN6855/WCN7850 WiFi, SDX62/SDX65 modems, which
seem not to support it correctly (Jose Ignacio Tornos Martinez)
* pci/virtualization:
PCI: Avoid SBR for Qualcomm WCN6855/WCN7850 WiFi, SDX62/SDX65 modems
PCI: Avoid FLR for MediaTek MT7925 WiFi
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- Require CAP_SYS_ADMIN to write to sysfs 'resourceN_resize' attributes
(Krzysztof Wilczyński)
- Convert PCI resource files to static attributes to avoid races that cause
'duplicate filename' warnings and boot panics (Krzysztof Wilczyński)
- Remove pci_create_sysfs_dev_files() and pci_remove_sysfs_dev_files(),
which are obsolete after converting to static attributes (Krzysztof
Wilczyński)
- Add security_locked_down(LOCKDOWN_PCI_ACCESS) to alpha PCI resource mmap
path to match the generic path (Krzysztof Wilczyński)
- Convert sysfs 'legacy_io' and 'legacy_mem' to static attributes
(Krzysztof Wilczyński)
- Remove pci_create_legacy_files() and pci_sysfs_init(), which are obsolete
after converting to static attributes (Krzysztof Wilczyński)
- Expose sysfs 'resourceN_resize' attributes only on platforms with PCI
mmap (Krzysztof Wilczyński)
- Use kstrtobool() to parse the 'rom' attribute input to avoid the
unexpected behavior of enabling the ROM when writing '0' with no trailing
newline (Krzysztof Wilczyński)
* pci/sysfs:
PCI/sysfs: Use kstrtobool() to parse the ROM attribute input
PCI/sysfs: Limit BAR resize attribute scope to platforms with PCI mmap
PCI/sysfs: Remove pci_create_legacy_files() and pci_sysfs_init()
PCI/sysfs: Convert legacy I/O and memory attributes to static definitions
PCI/sysfs: Add __weak pci_legacy_has_sparse() helper
alpha/PCI: Compute legacy size in pci_mmap_legacy_page_range()
PCI: Add macros for legacy I/O and memory address space sizes
PCI/sysfs: Remove pci_{create,remove}_sysfs_dev_files()
alpha/PCI: Convert resource files to static attributes
alpha/PCI: Add static PCI resource attribute macros
alpha/PCI: Remove WARN from __pci_mmap_fits() and __legacy_mmap_fits()
alpha/PCI: Fix __pci_mmap_fits() overflow for zero-length BARs
alpha/PCI: Use PCI resource accessor macros
alpha/PCI: Use BAR index in sysfs attr->private instead of resource pointer
alpha/PCI: Add security_locked_down() check to pci_mmap_resource()
PCI/sysfs: Limit pci_sysfs_init() late_initcall compile scope
PCI/sysfs: Add stubs for pci_{create,remove}_sysfs_dev_files()
PCI/sysfs: Warn about BAR resize failure in __resource_resize_store()
PCI/sysfs: Convert PCI resource files to static attributes
PCI/sysfs: Add static PCI resource attribute macros
PCI/sysfs: Add CAP_SYS_ADMIN check to __resource_resize_store()
PCI/sysfs: Split pci_llseek_resource() for device and legacy attributes
PCI/sysfs: Only allow supported resource types in I/O and MMIO helpers
PCI: Add pci_resource_is_io() and pci_resource_is_mem() helpers
PCI/sysfs: Use PCI resource accessor macros
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- Check option ROM header signatures and lengths before accessing to avoid
page faults and alignment faults (Guixin Liu)
* pci/rom:
PCI: Check ROM header and data structure addr before accessing
PCI: Introduce named defines for PCI ROM
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- Improve resource claim logging for debuggability (Ilpo Järvinen)
- Rename 'added' to 'add_list' for naming consistency (Ilpo Järvinen)
- Consolidate 'add_list' sanity checks (Ilpo Järvinen)
- Clean up several uses of const parameters (Ilpo Järvinen)
- Move pci_resource_alignment() from header to setup-res.c file (Ilpo
Järvinen)
* pci/resource:
PCI: Move pci_resource_alignment() to setup-res.c file
PCI: Convert pci_resource_alignment() input parameters to const
PCI: Make pci_sriov_resource_alignment() pci_dev const
powerpc/pseries: Make pseries_get_iov_fw_value() & pnv_iov_get() pci_dev const
resource: Make resource_alignment() input const resource
PCI: Remove const removal cast
PCI: Consolidate add_list (aka realloc_head) empty sanity checks
PCI: Rename 'added' to 'add_list'
PCI: Log all resource claims
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- Log device readiness timeouts as errors, not warnings (Bjorn Helgaas)
- Wait for device readiness after soft reset (D3hot -> D0uninitialized
transition), when the device may respond with Request Retry Status if it
needs more time to initialize (Bjorn Helgaas)
- Drop unnecessary retries when restoring BARs (Lukas Wunner)
* pci/reset:
PCI: Drop unnecessary retries when restoring BARs
PCI: Wait for device readiness after D3hot -> D0uninitialized transition
PCI: Log device readiness timeouts as errors
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- Don't try to power on/off devices unless we know they actually support
power control (Manivannan Sadhasivam)
* pci/pwrctrl:
PCI/pwrctrl: Lock device when calling device_is_bound()
PCI/pwrctrl: Do not try to power on/off devices that don't need pwrctrl
PCI/pwrctrl: Move pci_pwrctrl_is_required() earlier in file
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- Fix race between pci_proc_init() and pci_bus_add_device() (Krzysztof
Wilczyński)
* pci/procfs:
PCI/proc: Fix race between pci_proc_init() and pci_bus_add_device()
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- Set power state to 'unknown' for all devices, not just those with
drivers, during suspend (Lukas Wunner)
- Skip restoring Resizable BARs and VF Resizable BARs if device doesn't
respond to config reads, to avoid invalid array accesses (Marco
Nenciarini)
- Add pci_suspend_retains_context() so drivers can tell whether devices may
be reset while resuming from suspend due to platform issues; use this in
nvme to avoid issues on Qcom RCs (Manivannan Sadhasivam)
* pci/pm:
nvme-pci: Use pci_suspend_retains_context() during suspend
PCI: qcom: Indicate broken L1SS exit during resume from system suspend
PCI: Indicate context lost if L1SS exit is broken during resume from system suspend
PCI: Add pci_suspend_retains_context() to check if device state is preserved during suspend
PCI/IOV: Skip VF Resizable BAR restore on read error
PCI: Skip Resizable BAR restore on read error
PCI: Stop setting cached power state to 'unknown' on unbind
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- Prevent P2PDMA as well as CPU access to non-mappable BARs, e.g., s390 ISM
BARs (Matt Evans)
- Add Intel QAT, DSA, IAA devices to whitelist (Lukas Wunner)
* pci/p2pdma:
PCI/P2PDMA: Add Intel QAT, DSA, IAA devices to whitelist
PCI/P2PDMA: Avoid returning a provider for non_mappable_bars
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- Remove MPS/MRRS Kconfig settings (CONFIG_PCIE_BUS_*) that worked around a
WiFi device defect (Bjorn Helgaas)
- Always lift 2.5GT/s restriction in PCIe failed link retraining to avoid
clamping a link to 2.5GT/s after hot-plug changes the device (Maciej W.
Rozycki)
- Don't bother trying to retrain a 2.5GT/s link at 2.5GT/s since nothing
would be gained by the retrain (Maciej W. Rozycki)
* pci/enumeration:
PCI: Bail out early for 2.5GT/s devices in PCIe failed link retraining
PCI: Use pcie_get_speed_cap() in PCIe failed link retraining
PCI: Always lift 2.5GT/s restriction in PCIe failed link retraining
PCI: Remove MPS/MRRS Kconfig settings (CONFIG_PCIE_BUS_*)
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pci_write_rom() controls access to the ROM content through the
corresponding sysfs attribute, and treats the input as a request to
disable only when it matches the string "0\n" exactly:
if ((off == 0) && (*buf == '0') && (count == 2))
The count == 2 condition encodes the trailing newline that echo(1) appends.
This was found when userspace wrote "0" without a trailing newline aiming
to disable access, which failed to match the condition above and enabled
access instead. For example:
$ echo 0 > rom # "0\n", count 2, access disabled
$ echo -n 0 > rom # "0", count 1, access enabled
$ echo > rom # "", count 1, access enabled (likely not desirable)
Parse the input with kstrtobool(), which handles common boolean inputs such
as "0", "1", "n", "y" or "off", "on", with or without a trailing newline,
so both of the above disable access, and update the now stale comment.
As a side effect, input that does not parse as a boolean is rejected with
-EINVAL rather than enabling access. The documented "0" and "1" continue
to work as before, and rejecting malformed input brings the attribute in
line with how sysfs attributes typically handle it.
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20260612182448.552406-1-kwilczynski@kernel.org
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Currently, __resource_resize_store() uses sysfs_remove_groups() and
sysfs_create_groups() on pci_dev_resource_attr_groups to tear down and
recreate the resourceN files after a BAR resize, so the updated BAR sizes
are visible in sysfs.
The resourceN files only exist on platforms that define HAVE_PCI_MMAP or
ARCH_GENERIC_PCI_MMAP_RESOURCE. On platforms that define neither,
pci_dev_resource_attr_groups is NULL and the sysfs_remove_groups() and
sysfs_create_groups() calls in __resource_resize_store() become no-ops.
Resizable BAR (ReBAR) is a PCI Express Extended Capability
(PCI_EXT_CAP_ID_REBAR) that requires PCIe extended config space. Every
PCIe-capable architecture defines HAVE_PCI_MMAP or
ARCH_GENERIC_PCI_MMAP_RESOURCE (via arch headers or the asm-generic/pci.h
fallback). Architectures without either only support conventional PCI and
cannot have any ReBAR-capable devices.
Move the resize show and store helpers, the per-BAR attribute definitions,
and the attribute group behind the existing #ifdef HAVE_PCI_MMAP ||
ARCH_GENERIC_PCI_MMAP_RESOURCE guard, and fold the group reference in
pci_dev_groups[] into the existing #if block.
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Link: https://patch.msgid.link/20260508043543.217179-25-kwilczynski@kernel.org
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Currently, pci_create_legacy_files() and pci_remove_legacy_files() are
no-op stubs. With legacy attributes now handled by static groups
registered via pcibus_groups[], no call site needs them.
Remove both functions, their declarations, and the call sites in
pci_register_host_bridge(), pci_alloc_child_bus(), and pci_remove_bus().
Remove the pci_sysfs_init() late_initcall and sysfs_initialized. The
late_initcall originally existed to create all the dynamic PCI sysfs files,
but with both resource and legacy attributes now handled by static groups,
it is no longer needed.
Remove the legacy_io and legacy_mem fields from struct pci_bus which were
used to track the dynamically allocated legacy attributes.
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Link: https://patch.msgid.link/20260508043543.217179-24-kwilczynski@kernel.org
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Currently, legacy_io and legacy_mem are dynamically allocated and created
by pci_create_legacy_files(), with pci_adjust_legacy_attr() updating the
attributes at runtime on Alpha to rename them and shift the size for sparse
addressing.
Convert to four static const attributes (legacy_io, legacy_io_sparse,
legacy_mem, legacy_mem_sparse) with .is_bin_visible() callbacks that use
pci_legacy_has_sparse() to select the appropriate variant per bus. The
sizes are compile-time constants and .size is set directly on each
attribute.
Register the groups in pcibus_groups[] under a HAVE_PCI_LEGACY guard so the
driver model handles creation and removal automatically.
Stub out pci_create_legacy_files() and pci_remove_legacy_files() as the
dynamic creation is no longer needed. Remove the __weak
pci_adjust_legacy_attr(), Alpha's override, and its declaration from both
Alpha and PowerPC asm/pci.h headers.
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Link: https://patch.msgid.link/20260508043543.217179-23-kwilczynski@kernel.org
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Currently, Alpha's sparse/dense legacy attribute handling is done via
pci_adjust_legacy_attr(), which updates dynamically allocated attributes at
runtime. The upcoming conversion to static attributes needs a way to
determine sparse support at visibility check time.
Add a __weak pci_legacy_has_sparse() that returns false by default. Alpha
overrides it to check has_sparse() on the bus host controller.
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Link: https://patch.msgid.link/20260508043543.217179-22-kwilczynski@kernel.org
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