PCI: mobiveil: Sort Kconfig entries by vendor

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

Link: https://lore.kernel.org/r/20230418174336.145585-8-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/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

PCI: mobiveil: Improve PCIE_LAYERSCAPE_GEN4 dependencies

- Drop the dependency on PCI, as this is implied by the dependency on
PCI_MSI_IRQ_DOMAIN,
- Drop the dependencies on OF and ARM64, as the driver compiles fine
without OF and/or on other architectures,
- The Freescale Layerscape PCIe Gen4 controller is present only on
Freescale Layerscape SoCs. Hence depend on ARCH_LAYERSCAPE, to
prevent asking the user about this driver when configuring a kernel
without Freescale Layerscape support, unless compile-testing.

Link: https://lore.kernel.org/r/20210208142301.413582-1-geert+renesas@glider.be
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

PCI: mobiveil: Fix unmet dependency warning for PCIE_MOBIVEIL_PLAT

Fix the following warning by adding the dependency PCI_MSI_IRQ_DOMAIN
to PCIE_MOBIVEIL_PLAT.

WARNING: unmet direct dependencies detected for PCIE_MOBIVEIL_HOST
Depends on [n]: PCI [=y] && PCI_MSI_IRQ_DOMAIN [=n]
Selected by [y]:
- PCIE_MOBIVEIL_PLAT [=y] && PCI [=y] && (ARCH_ZYNQMP || COMPILE_TEST [=y]) && OF [=y]

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

PCI: mobiveil: Add PCIe Gen4 RC driver for Layerscape SoCs

Add a PCI host controller driver for Layerscape SoCs integrating
the Mobiveil 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: Minghuan Lian <Minghuan.Lian@nxp.com>
Reviewed-by: Andrew Murray <amurray@thegoodpenguin.co.uk>

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>