PCI: xilinx-xdma: Add Xilinx XDMA Root Port driver

Add support for Xilinx XDMA Soft IP core as Root Port.

The Zynq UltraScale+ MPSoCs devices support XDMA soft IP module in
programmable logic.

The integrated XDMA Soft IP block has integrated bridge function that
can act as PCIe Root Port.

[kwilczynski: correct indentation and whitespaces, Kconfig help update]
Link: https://lore.kernel.org/linux-pci/20231003173453.938190-4-thippeswamy.havalige@amd.com
Signed-off-by: Thippeswamy Havalige <thippeswamy.havalige@amd.com>
Signed-off-by: Bharat Kumar Gogada <bharat.kumar.gogada@amd.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>

PCI: microchip: Enable building driver as a module

Enable building driver as a module. The expected use case is the
driver is built as a module, is installed when needed, and cannot be
removed once installed since it is not possible to clean-up
the irq_chip data structures on removal, as described in:

https://lore.kernel.org/linux-pci/87y1wgbah8.wl-maz@kernel.org/

The driver has .suppress_bind_attrs set to true for the same
reasons (ie prevent unbinding, that would leave the kernel
with stale IRQ configuration that cannot be cleaned up).

Link: https://lore.kernel.org/linux-pci/87y1wgbah8.wl-maz@kernel.org/
Link: https://lore.kernel.org/r/20230728131401.1615724-3-daire.mcnamara@microchip.com
Suggested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Daire McNamara <daire.mcnamara@microchip.com>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>

Revert "PCI: mvebu: Mark driver as BROKEN"

b3574f579ece ("PCI: mvebu: Mark driver as BROKEN") made it impossible to
enable the pci-mvebu driver. The driver does have known problems, but as
Russell and Uwe reported, it does work in some configurations, so removing
it broke some working setups.

Revert b3574f579ece so pci-mvebu is available.

Reported-by: Russell King (Oracle) <linux@armlinux.org.uk>
Link: https://lore.kernel.org/r/ZMzicVQEyHyZzBOc@shell.armlinux.org.uk
Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230804134622.pmbymxtzxj2yfhri@pengutronix.de
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

PCI: xilinx: Drop obsolete dependency on COMPILE_TEST

Since commit 0166dc11be91 ("of: make CONFIG_OF user selectable"), it is
possible to test-build any driver which depends on OF on any architecture
by explicitly selecting OF. Therefore depending on COMPILE_TEST as an
alternative is no longer needed.

Link: https://lore.kernel.org/r/20230407190843.529caf19@endymion.delvare
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Lorenzo Pieralisi <lpieralisi@kernel.org>
Cc: Rob Herring <robh@kernel.org>
Cc: "Krzysztof Wilczyński" <kw@linux.com>

PCI: Sort controller Kconfig entries by vendor

Sort Kconfig entries by vendor so they appear in alphabetical order in
menuconfig.

Link: https://lore.kernel.org/r/20230418174336.145585-6-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

PCI: Use consistent controller Kconfig menu entry language

Use "PCIe controller" consistently instead of "host bridge", "bus driver",
etc. Annotate with "(host mode)" or "(endpoint mode)" as needed.

Link: https://lore.kernel.org/r/20230418174336.145585-5-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

PCI: xilinx-nwl: Add 'Xilinx' to Kconfig prompt

Add the "Xilinx" vendor name to the CONFIG_PCIE_XILINX_NWL Kconfig prompt
so it matches other drivers. Rename from "PCIe Core" to "PCIe controller".

Link: https://lore.kernel.org/r/20230418174336.145585-4-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Michal Simek <michal.simek@amd.com>

PCI: hv: Add 'Microsoft' to Kconfig prompt

Add the "Microsoft" vendor name to the CONFIG_PCI_HYPERV_INTERFACE Kconfig
prompt so it matches other PCIe drivers and other Hyper-V prompts.

Link: https://lore.kernel.org/r/20230418174336.145585-3-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Wei Liu <wei.liu@kernel.org>
Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Dexuan Cui <decui@microsoft.com>

PCI: hv: Drop duplicate PCI_MSI dependency

Commit a474d3fbe287 ("PCI/MSI: Get rid of PCI_MSI_IRQ_DOMAIN") removed
PCI_MSI_IRQ_DOMAIN and made all previous references to it refer to PCI_MSI
instead.

PCI_HYPERV_INTERFACE already depended on PCI_MSI && PCI_MSI_IRQ_DOMAIN, so
we ended up with a redundant dependency on PCI_MSI && PCI_MSI. Drop the
duplicate.

No functional change. Just a stylistic clean-up.

Link: https://lore.kernel.org/r/20221215101310.9135-1-lukas.bulwahn@gmail.com
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

PCI: mvebu: Mark driver as BROKEN

People are reporting that pci-mvebu.c driver does not work with recent
mainline kernel. There are more bugs which prevents its for daily usage.
So lets mark it as broken for now, until somebody would be able to fix it
in mainline kernel.

Link: https://lore.kernel.org/r/20230114164125.1298-1-pali@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>

drivers/pci/controller: Remove "select SRCU"

Now that the SRCU Kconfig option is unconditionally selected, there is
no longer any point in selecting it. Therefore, remove the "select SRCU"
Kconfig statements.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Lorenzo Pieralisi <lpieralisi@kernel.org>
Cc: Rob Herring <robh@kernel.org>
Cc: "Krzysztof Wilczyński" <kw@linux.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: <linux-pci@vger.kernel.org>
Acked-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: John Ogness <john.ogness@linutronix.de>

PCI/MSI: Get rid of PCI_MSI_IRQ_DOMAIN

What a zoo:

PCI_MSI
select GENERIC_MSI_IRQ

PCI_MSI_IRQ_DOMAIN
def_bool y
depends on PCI_MSI
select GENERIC_MSI_IRQ_DOMAIN

Ergo PCI_MSI enables PCI_MSI_IRQ_DOMAIN which in turn selects
GENERIC_MSI_IRQ_DOMAIN. So all the dependencies on PCI_MSI_IRQ_DOMAIN are
just an indirection to PCI_MSI.

Match the reality and just admit that PCI_MSI requires
GENERIC_MSI_IRQ_DOMAIN.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20221111122014.467556921@linutronix.de

arm64: bcmbca: Make BCM4908 drivers depend on ARCH_BCMBCA

With Broadcom Broadband arch ARCH_BCMBCA supported in the kernel, this
patch series migrate the ARCH_BCM4908 symbol to ARCH_BCMBCA. Hence
replace ARCH_BCM4908 with ARCH_BCMBCA in subsystem Kconfig files.

Signed-off-by: William Zhang <william.zhang@broadcom.com>
Acked-by: Guenter Roeck <linux@roeck-us.net> (for watchdog)
Acked-by: Bjorn Helgaas <bhelgaas@google.com> (for drivers/pci)
Acked-by: Wolfram Sang <wsa@kernel.org> (for i2c)
Acked-by: Philipp Zabel <p.zabel@pengutronix.de> (for reset)
Link: https://lore.kernel.org/r/20220803175455.47638-7-william.zhang@broadcom.com
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

PCI: loongson: Add ACPI init support

Loongson PCH (LS7A chipset) will be used by both MIPS-based and LoongArch-
based Loongson processors. MIPS-based Loongson uses FDT, while LoongArch-
based Loongson uses ACPI.

Add ACPI init support for the driver in pci-loongson.c because it is
currently FDT-only.

LoongArch is a new RISC ISA, mainline support will come soon, and
documentations are here (in translation):

https://github.com/loongson/LoongArch-Documentation

Link: https://lore.kernel.org/r/20220714124216.1489304-4-chenhuacai@loongson.cn
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

PCI: mediatek: Allow building for ARCH_AIROHA

Allow selecting the pcie-mediatek driver if ARCH_AIROHA is set, because the
Airoha EN7523 SoC uses the same controller as MT7622.

The driver itself is not modified. The PCIe controller DT node should use
mediatek,mt7622-pcie after airoha,en7523-pcie.

Link: https://lore.kernel.org/r/20220615125335.96089-2-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

PCI: mvebu: Add help string for CONFIG_PCI_MVEBU option

There is no description for CONFIG_PCI_MVEBU option. Add it.

Link: https://lore.kernel.org/r/20220104153529.31647-6-pali@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

PCI: mt7621: Allow COMPILE_TEST for all arches

Since all MIPS-specific code has been removed from driver, allow it to be
enabled for COMPILE_TEST on all architectures.

Mark it as tristate and remove MIPS the MIPS dependency.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

PCI: hv: Add arm64 Hyper-V vPCI support

Add arm64 Hyper-V vPCI support by implementing the arch specific
interfaces. Introduce an IRQ domain and chip specific to Hyper-v vPCI that
is based on SPIs. The IRQ domain parents itself to the arch GIC IRQ domain
for basic vector management.

[bhelgaas: squash in fix from Yang Li <yang.lee@linux.alibaba.com>:
https://lore.kernel.org/r/20220112003324.62755-1-yang.lee@linux.alibaba.com]
Link: https://lore.kernel.org/r/1641411156-31705-3-git-send-email-sunilmut@linux.microsoft.com
Signed-off-by: Sunil Muthuswamy <sunilmut@microsoft.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>

PCI: mvebu: Add support for compiling driver as module

Now when driver uses devm_pci_remap_iospace() function, it is possible
implement ->remove() callback for unbinding device from driver.

Implement mvebu_pcie_remove() callback with proper cleanup phase, drop
driver's suppress_bind_attrs flag and switch type of CONFIG_PCI_MVEBU
option from bool to tristate.

This allows to compile pci-mvebu.c driver as loadable module pci-mvebu.ko
with ability to unload it.

Link: https://lore.kernel.org/r/20211126144307.7568-3-pali@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

PCI: brcmstb: Augment driver for MIPs SOCs

The current brcmstb driver works for Arm and Arm64. A few things are
modified here for us to support MIPs as well.

o There are four outbound range register groups and each directs a window
of up to 128MB. Even though there are four 128MB DT "ranges" in the
bmips PCIe DT node, these ranges are contiguous and are collapsed into
a single range by the OF range parser. Now the driver assumes a single
range -- for MIPs only -- and splits it back into 128MB sizes.

o For bcm7425, the config space accesses must be 32-bit reads or
writes. In addition, the 4k config space register array is missing
and not used.

o The registers for the upper 32-bits of the outbound window address do
not exist.

o Burst size must be set to 256 (this refers to an internal bus).

Signed-off-by: Jim Quinlan <jim2101024@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

PCI: mt7621: Convert driver into 'bool'

The driver is not ready yet to be compiled as a module since it depends
on some symbols not exported on MIPS. We have the following current
problems:

Building mips:allmodconfig ... failed
--------------
Error log:
ERROR: modpost: missing MODULE_LICENSE() in drivers/pci/controller/pcie-mt7621.o
ERROR: modpost: "mips_cm_unlock_other" [drivers/pci/controller/pcie-mt7621.ko] undefined!
ERROR: modpost: "mips_cpc_base" [drivers/pci/controller/pcie-mt7621.ko] undefined!
ERROR: modpost: "mips_cm_lock_other" [drivers/pci/controller/pcie-mt7621.ko] undefined!
ERROR: modpost: "mips_cm_is64" [drivers/pci/controller/pcie-mt7621.ko] undefined!
ERROR: modpost: "mips_gcr_base" [drivers/pci/controller/pcie-mt7621.ko] undefined!

Temporarily move from 'tristate' to 'bool' until a better solution is
ready.

Also RALINK is redundant because SOC_MT7621 already depends on it.
Hence, simplify condition.

Fixes: 2bdd5238e756 ("PCI: mt7621: Add MediaTek MT7621 PCIe host controller driver").
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Reviewed-and-Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

PCI: brcmstb: Allow building for BMIPS_GENERIC

BMIPS_GENERIC denotes support for the MIPS-based Broadcom STB platforms
which this driver can support.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

iommu/dart: Exclude MSI doorbell from PCIe device IOVA range

The MSI doorbell on Apple HW can be any address in the low 4GB range.
However, the MSI write is matched by the PCIe block before hitting the
iommu. It must thus be excluded from the IOVA range that is assigned to any
PCIe device.

Link: https://lore.kernel.org/r/20210929163847.2807812-9-maz@kernel.org
Tested-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Sven Peter <sven@svenpeter.dev>

PCI: apple: Add initial hardware bring-up

Add a minimal driver to bring up the PCIe bus on Apple system-on-chips,
particularly the Apple M1. This driver exposes the internal bus used for
the USB type-A ports, Ethernet, Wi-Fi, and Bluetooth. Bringing up the
radios requires additional drivers beyond what's necessary for PCIe itself.

Co-developed-by: Stan Skowronek <stan@corellium.com>
Link: https://lore.kernel.org/r/20210929163847.2807812-5-maz@kernel.org
Signed-off-by: Stan Skowronek <stan@corellium.com>
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Sven Peter <sven@svenpeter.dev>

PCI: mt7621: Add MediaTek MT7621 PCIe host controller driver

Add driver for the PCIe controller of the MT7621 SoC.

[bhelgaas: rename from pci-mt7621.c to pcie-mt7621.c; also rename Kconfig
symbol from PCI_MT7621 to PCIE_MT7621]
Link: https://lore.kernel.org/r/20210922050035.18162-3-sergio.paracuellos@gmail.com
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

PCI: vmd: depend on !UML

With UML having enabled (simulated) PCI on UML, VMD breaks
allyesconfig/allmodconfig compilation because it assumes
it's running on X86_64 bare metal, and has hardcoded API
use of ARCH=x86. Make it depend on !UML to fix this.

Link: https://lore.kernel.org/r/20210811162530.affe26231bc3.I131b3c1e67e3d2ead6e98addd256c835fbef9a3e@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Jon Derrick <jonathan.derrick@intel.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested

PCI: controller: PCI_IXP4XX should depend on ARCH_IXP4XX

The Intel IXP4xx PCI controller is only present on Intel IXP4xx
XScale-based network processor SoCs.

Add a dependency on ARCH_IXP4XX, to prevent asking the user about this
driver when configuring a kernel without support for the XScale
processor family.

Link: https://lore.kernel.org/r/6a88e55fe58fc280f4ff1ca83c154e4895b6dcbf.1624972789.git.geert+renesas@glider.be
Fixes: f7821b4934584824 ("PCI: ixp4xx: Add a new driver for IXP4xx")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
[lorenzo.pieralisi@arm.com: commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

PCI: ixp4xx: Add a new driver for IXP4xx

This adds a new PCI controller driver for the Intel IXP4xx
(IX425, IXP435 etc), based on the XScale microarchitecture.

This replaces the old driver in arch/arm/mach-ixp4xx/common-pci.c
which utilized the ARM-specific BIOS32 PCI framework,
and all parameterization for such things as memory and
IO space as well as interrupt swizzling is done from the
device tree.

The plan is to phase out and delete the old driver piecemal.

The __raw_writel() and __raw_readl() are used for accessing
the PCI controller for the same reason that these accessors
are used in the timer, IRQ and GPIO drivers: the platform
will alter its address bus pattern based on whether the
system is booted in big- or little-endian mode. For this
reason all register on IXP4xx must always be accessed in
native (CPU) endianness.

This driver supports 64MB of PCI memory space, but not the
indirect access of 1GB that is available in the old driver.
We can address that later if and only if there are users
that need all 1GB of PCI address space. Krzysztof reports
having to use indirect MMIO only once for a VGA card. There
is work ongoing for general indirect MMIO. (In practice
the indirect MMIO is performed by writing address and
writing and reading values into/from a controller
register.)

Tested by booting the NSLU2, attaching a USB stick, mounting
and browsing the drive.

Link: https://lore.kernel.org/linux-arm-kernel/m37edwuv8m.fsf@t19.piap.pl/
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Imre Kaloz <kaloz@openwrt.org>
Cc: Krzysztof Halasa <khalasa@piap.pl>
Cc: Zoltan HERPAI <wigyori@uid0.hu>
Cc: Raylynn Knight <rayknight@me.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

PCI: mediatek-gen3: Add MediaTek Gen3 driver for MT8192

MediaTek's PCIe host controller has three generation HWs, the new
generation HW is an individual bridge, it supports Gen3 speed and
compatible with Gen2, Gen1 speed.

Add support for new Gen3 controller which can be found on MT8192.

Link: https://lore.kernel.org/r/20210420061723.989-4-jianjun.wang@mediatek.com
Signed-off-by: Jianjun Wang <jianjun.wang@mediatek.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Ryder Lee <ryder.lee@mediatek.com>

PCI: xilinx: Convert to MSI domains

In anticipation of the removal of the msi_controller structure, convert
the ancient xilinx host controller driver to MSI domains.

We end-up with the usual two domain structure, the top one being a
generic PCI/MSI domain, the bottom one being xilinx-specific and handling
the actual HW interrupt allocation.

This allows us to fix some of the most appaling MSI programming, where
the message programmed in the device is the virtual IRQ number instead
of the allocated vector number. The allocator is also made safe with
a mutex. This should allow support for MultiMSI, but I decided not to
even try, since I cannot test it.

Link: https://lore.kernel.org/r/20210330151145.997953-6-maz@kernel.org
Tested-by: Bharat Kumar Gogada <bharatku@xilinx.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>

PCI: rcar: Convert to MSI domains

In anticipation of the removal of the msi_controller structure, convert
the Rcar host controller driver to MSI domains.

We end-up with the usual two domain structure, the top one being a
generic PCI/MSI domain, the bottom one being Rcar-specific and handling
the actual HW interrupt allocation.

Link: https://lore.kernel.org/r/20210330151145.997953-4-maz@kernel.org
Tested-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
[lorenzo.pieralisi@arm.com: merged fix https://lore.kernel.org/linux-pci/87y2e2p9wk.wl-maz@kernel.org]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>

PCI: tegra: Convert to MSI domains

In anticipation of the removal of the msi_controller structure, convert
the Tegra host controller driver to MSI domains.

We end-up with the usual two domain structure, the top one being a
generic PCI/MSI domain, the bottom one being Tegra-specific and handling
the actual HW interrupt allocation.

While at it, convert the normal interrupt handler to a chained handler,
handle the controller's MSI IRQ edge triggered, support multiple MSIs
per device and use the AFI_MSI_EN_VEC* registers to provide MSI masking.

[treding@nvidia.com: fix, clean up and address TODOs from Marc's draft]

Link: https://lore.kernel.org/r/20210330151145.997953-2-maz@kernel.org
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>

PCI: microchip: Add Microchip PolarFire PCIe controller driver

Add support for the Microchip PolarFire PCIe controller when configured in
host (Root Complex) mode.

[bhelgaas: wrap lines to fit in 80 columns, fix trivial style issues]
Link: https://lore.kernel.org/r/20210125162934.5335-4-daire.mcnamara@microchip.com
Signed-off-by: Daire McNamara <daire.mcnamara@microchip.com>
[lorenzo.pieralisi@arm.com: minor comments tweak]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rob Herring <robh@kernel.org>

PCI: Remove tango host controller driver

The tango platform is getting removed, so the driver is no
longer needed.

Link: https://lore.kernel.org/r/20210120150800.1650898-1-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Mans Rullgard <mans@mansr.com>
Cc: Marc Gonzalez <marc.w.gonzalez@free.fr>
Cc: Mans Rullgard <mans@mansr.com>

PCI: Drop PCIE_RCAR config option

All the defconfig files have replaced PCIE_RCAR config option with
PCIE_RCAR_HOST config option which built the same driver, so we can
now safely drop PCIE_RCAR config option.

Link: https://lore.kernel.org/r/20201229170848.18482-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

PCI: brcmstb: support BCM4908 with external PERST# signal controller

BCM4908 uses external MISC block for controlling PERST# signal. Use it
as a reset controller.

Link: https://lore.kernel.org/r/20201210180421.7230-3-zajec5@gmail.com
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>

PCI: brcmstb: PCIE_BRCMSTB depends on ARCH_BRCMSTB

Have PCIE_BRCMSTB depend on ARCH_BRCMSTB. Also set the default value to
ARCH_BRCMSTB.

Link: https://lore.kernel.org/r/20200911175232.19016-2-james.quinlan@broadcom.com
Signed-off-by: Jim Quinlan <jquinlan@broadcom.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>

PCI/MSI: Make arch_.*_msi_irq[s] fallbacks selectable

The arch_.*_msi_irq[s] fallbacks are compiled in whether an architecture
requires them or not. Architectures which are fully utilizing hierarchical
irq domains should never call into that code.

It's not only architectures which depend on that by implementing one or
more of the weak functions, there is also a bunch of drivers which relies
on the weak functions which invoke msi_controller::setup_irq[s] and
msi_controller::teardown_irq.

Make the architectures and drivers which rely on them select them in Kconfig
and if not selected replace them by stub functions which emit a warning and
fail the PCI/MSI interrupt allocation.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20200826112333.992429909@linutronix.de

PCI: hip: Add handling of HiSilicon HIP PCIe controller errors

The HiSilicon HIP PCIe controller is capable of handling errors
on root port and performing port reset separately at each root port.

Add error handling driver for HIP PCIe controller to log
and report recoverable errors. Perform root port reset and restore
link status after the recovery.

Following are some of the PCIe controller's recoverable errors
1. completion transmission timeout error.
2. CRS retry counter over the threshold error.
3. ECC 2 bit errors
4. AXI bresponse/rresponse errors etc.

The driver placed in the drivers/pci/controller/ because the
HIP PCIe controller does not use DWC IP.

Link: https://lore.kernel.org/r/20200903123456.1823-3-shiju.jose@huawei.com
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>

PCI: aardvark: Implement driver 'remove' function and allow to build it as module

Providing driver's 'remove' function allows kernel to bind and unbind devices
from aardvark driver. It also allows to build aardvark driver as a module.

Compiling aardvark as a module simplifies development and debugging of
this driver as it can be reloaded at runtime without the need to reboot
to new kernel.

Link: https://lore.kernel.org/r/20200907111038.5811-5-pali@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Marek Behún <marek.behun@nic.cz>

PCI: xilinx-cpm: Add Versal CPM Root Port driver

Add support for Versal CPM as Root Port.

The Versal ACAP devices include CCIX-PCIe Module (CPM). The integrated
block for CPM along with the integrated bridge can function as PCIe Root
Port.

Bridge error and legacy interrupts in Versal CPM are handled using Versal
CPM specific interrupt line.

[bhelgaas: fold in kerneldoc fix from
https://lore.kernel.org/linux-acpi/20200729201224.26799-7-krzk@kernel.org/]
Link: https://lore.kernel.org/r/1592312214-9347-3-git-send-email-bharat.kumar.gogada@xilinx.com
Signed-off-by: Bharat Kumar Gogada <bharat.kumar.gogada@xilinx.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rob Herring <robh@kernel.org>

treewide: replace '---help---' in Kconfig files with 'help'

Since commit 84af7a6194e4 ("checkpatch: kconfig: prefer 'help' over
'---help---'"), the number of '---help---' has been gradually
decreasing, but there are still more than 2400 instances.

This commit finishes the conversion. While I touched the lines,
I also fixed the indentation.

There are a variety of indentation styles found.

a) 4 spaces + '---help---'
b) 7 spaces + '---help---'
c) 8 spaces + '---help---'
d) 1 space + 1 tab + '---help---'
e) 1 tab + '---help---' (correct indentation)
f) 1 tab + 1 space + '---help---'
g) 1 tab + 2 spaces + '---help---'

In order to convert all of them to 1 tab + 'help', I ran the
following commend:

$ find . -name 'Kconfig*' | xargs sed -i 's/^[[:space:]]*---help---/\thelp/'

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

PCI: Add Loongson PCI Controller support

This controller can be found on Loongson-2K SoC, Loongson-3
systems with RS780E/LS7A PCH.

The RS780E part of code was previously located at
arch/mips/pci/ops-loongson3.c and now it can use generic PCI
driver implementation.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

PCI: rcar: Add endpoint mode support

Add support for R-Car PCIe controller to work in endpoint mode.

Link: https://lore.kernel.org/r/1588854799-13710-8-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>

PCI: rcar: Rename pcie-rcar.c to pcie-rcar-host.c

This commit renames pcie-rcar.c to pcie-rcar-host.c in preparation for
adding support for endpoint mode. CONFIG_PCIE_RCAR is kept so that arm64
defconfig change can be a separate patch.

With this patch both config options PCIE_RCAR and PCIE_RCAR_HOST will be
available but PCIE_RCAR internally selects PCIE_RCAR_HOST so that bisect
builds wont be affected.

Link: https://lore.kernel.org/r/1588854799-13710-2-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>

PCI: host-generic: Support building as modules

Enable building host-generic and its host-common dependency as a
module.

Link: https://lore.kernel.org/r/20200409234923.21598-3-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Andrew Murray <amurray@thegoodpenguin.co.uk>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Will Deacon <will@kernel.org>
Cc: linux-pci@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org

PCI: mobiveil: Modularize the Mobiveil PCIe Host Bridge IP driver

Modularize the Mobiveil PCIe host driver according to the abstraction of
Root Complex and Endpoint and move it into a new directory in order to
make it easier to reuse the driver functions to add new host drivers for
systems integrating the Mobiveil PCIe GPEX IP.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
[lorenzo.pieralisi@arm.com: updated commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>

PCI: brcmstb: Add MSI support

This adds MSI support to the Broadcom STB PCIe host controller. The MSI
controller is physically located within the PCIe block, however, there
is no reason why the MSI controller could not be moved elsewhere in the
future. MSIX is not supported by the HW.

Since the internal Brcmstb MSI controller is intertwined with the PCIe
controller, it is not its own platform device but rather part of the
PCIe platform device.

Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com>
Co-developed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>

PCI: brcmstb: Add Broadcom STB PCIe host controller driver

This adds a basic driver for Broadcom's STB PCIe controller, for now
aimed at Raspberry Pi 4's SoC, bcm2711.

Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com>
Co-developed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
[lorenzo.pieralisi@arm.com: updated brcm_pcie_get_rc_bar2_size_and_offset()according to https://lore.kernel.org/linux-pci/be8ddb33a7360af1815cf686f77f3f0913d02be3.camel@suse.de]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
Reviewed-by: Jeremy Linton <jeremy.linton@arm.com>

PCI: vmd: Remove dma_map_ops overrides

Devices on the VMD domain use the VMD endpoint's requester ID and have been
relying on the VMD endpoint's DMA operations. The problem with this was
that VMD domain devices would use the VMD endpoint's attributes when doing
DMA and IOMMU mapping. We can be smarter about this by only using the VMD
endpoint when mapping and providing the correct child device's attributes
during DMA operations.

Remove the dma_map_ops redirect.

Link: https://lore.kernel.org/r/1579613871-301529-7-git-send-email-jonathan.derrick@intel.com
Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

PCI: cadence: Move all files to per-device cadence directory

Cadence core library files may be used by various platform drivers.
Add a new directory "cadence" to group all the Cadence core library files
and the platforms using Cadence core library.

Signed-off-by: Tom Joseph <tjoseph@cadence.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>

PCI: cadence: Refactor driver to use as a core library

Cadence PCIe host and endpoint IP may be embedded into a variety of
SoCs/platforms. Let's extract the platform related APIs/Structures in the
current driver to a separate file (pcie-cadence-plat.c), such that the
common functionality can be used by future platforms.

Signed-off-by: Tom Joseph <tjoseph@cadence.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>

PCI: versatile: Enable COMPILE_TEST

Since commit a574795bc383 ("PCI: generic,versatile: Remove unused
pci_sys_data structures") the build dependency on ARM is gone, so let's
enable COMPILE_TEST for versatile.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>

PCI: hv: Add a Hyper-V PCI interface driver for software backchannel interface

This interface driver is a helper driver allows other drivers to
have a common interface with the Hyper-V PCI frontend driver.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

PCI: altera-msi: Allow building as module

Altera MSI IP is a soft IP and is only available after
an FPGA image (with design containing it) is programmed.

Make driver modulable to support use case FPGA image is programmed the
after kernel has booted, so that the driver can be loaded upon request.

Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

PCI: altera: Allow building as module

Altera PCIe Rootport IP is a soft IP and is only available after
an FPGA image (whose design contains it) is programmed.

Make driver modulable to support use cases when FPGA image is
programmed after the kernel has booted, so that the driver
can be loaded upon request.

Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

x86/pci: Clean up usage of X86_DEV_DMA_OPS

We have supported per-device dma_map_ops in generic code for a long
time, and this symbol just guards the inclusion of the dma_map_ops
registry used for vmd. Stop enabling it for anything but vmd.

No change in functionality intended.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20190410080220.21705-3-hch@lst.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>

PCI: altera: Enable driver on ARM64

Enable PCIE_ALTERA on ARM64 platform.

Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

PCI: aardvark: Implement emulated root PCI bridge config space

The PCI controller in the Marvell Armada 3720 does not implement a
software-accessible root port PCI bridge configuration space. This
causes a number of problems when using PCIe switches or when the Max
Payload size needs to be aligned between the root complex and the
endpoint.

Implementing an emulated root PCI bridge, like is already done in the
pci-mvebu driver for older Marvell platforms allows to solve those
issues, and also to support features such as ASR, PME, VC, HP.

Signed-off-by: Zachary Zhang <zhangzg@marvell.com>
[Thomas: convert to the common emulated PCI bridge logic.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

PCI: mvebu: Convert to PCI emulated bridge config space

Convert the pci-mvebu driver to use the pci-bridge-emul logic, that
helps emulating a root port PCI bridge configuration space.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
[lorenzo.pieralisi@arm.com: updated commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

PCI: mediatek: Add loadable kernel module support

Implement remove() callback function for the Mediatek PCIe controller
driver to add loadable kernel module support.

Save the PCIe's GIC IRQ at probe so that it can be retrieved to
call dispose_irq() to tear down the IRQ upon module removal.

Signed-off-by: Honghui Zhang <honghui.zhang@mediatek.com>
[lorenzo.pieralisi@arm.com: updated commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Ryder Lee <ryder.lee@mediatek.com>

PCI/xilinx: Depend on OF instead of the ARCH

There isn't a hard dependency of the Xilinx AXI-PCIe host bridge on any
architecture. For example: at SiFive we map RISC-V cores to Xilinx FPGAs
and connect the Xilinx IP via a TileLink adapter, so the RISC-V Linux
port will need to be able to enable PCIE_XILINX in order to have PCIe
support.

This patch decouples the PCIE_XILINX support from ARCH. Instead it just
depends on OF, which is the only true dependency.

Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
[hch: switch to OF instead of OF_PCI now that the latter is gone]
Signed-off-by: Christoph Hellwig <hch@lst.de>
[lorenzo.pieralisi@arm.com: trimmed the commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

PCI: mobiveil: Add Kconfig/Makefile entries

commit 9af6bcb11e12 ("PCI: mobiveil: Add Mobiveil PCIe Host Bridge IP
driver") did not add the configuration and build infrastructure to
configure and build the mobiveil controller driver, so at present the
driver code is in the kernel but cannot be compiled.

Add the mobiveil controller driver Kconfig/Makefile infrastructure.

Fixes: 9af6bcb11e12 ("PCI: mobiveil: Add Mobiveil PCIe Host Bridge IP
driver")
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>

PCI: controller: Move PCI_DOMAINS selection to arch Kconfig

Commit 51bc085d6454 ("PCI: Improve host drivers compile test coverage")
added configuration options to allow PCI host controller drivers to be
compile tested on all architectures.

Some host controller drivers (eg PCIE_ALTERA) config entries select the
PCI_DOMAINS config option to enable PCI domains management in the kernel.
Now that host controller drivers can be compiled on all architectures, this
triggers build regressions on arches that do not implement the PCI_DOMAINS
required API (ie pci_domain_nr()):

drivers/ata/pata_ali.c: In function 'ali_init_chipset':
drivers/ata/pata_ali.c:469:38: error: implicit declaration of function 'pci_domain_nr'; did you mean 'pci_iomap_wc'?

Furthemore, some software configurations (ie Jailhouse) require a
PCI_DOMAINS enabled kernel to configure multiple host controllers without
having an explicit dependency on the ARM platform on which they run.

Make PCI_DOMAINS a visible configuration option on ARM so that software
configurations that need it can manually select it and move the PCI_DOMAINS
selection from PCI controllers configuration file to ARM sub-arch config
entries that currently require it, fixing the issue.

Fixes: 51bc085d6454 ("PCI: Improve host drivers compile test coverage")
Link: https://lkml.kernel.org/r/20180612170229.GA10141@roeck-us.net
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <helgaas@kernel.org>
Acked-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Ley Foon Tan <ley.foon.tan@intel.com>
Acked-by: Rob Herring <robh@kernel.org>
Cc: Scott Branden <scott.branden@broadcom.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Guenter Roeck <linux@roeck-us.net>

PCI: Collect all native drivers under drivers/pci/controller/

Native PCI drivers for root complex devices were originally all in
drivers/pci/host/. Some of these devices can also be operated in endpoint
mode. Drivers for endpoint mode didn't seem to fit in the "host"
directory, so we put both the root complex and endpoint drivers in
per-device directories, e.g., drivers/pci/dwc/, drivers/pci/cadence/, etc.

These per-device directories contain trivial Kconfig and Makefiles and
clutter drivers/pci/. Make a new drivers/pci/controllers/ directory and
collect all the device-specific drivers there.

No functional change intended.

Link: https://lkml.kernel.org/r/1520304202-232891-1-git-send-email-shawn.lin@rock-chips.com
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
[bhelgaas: changelog]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>