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From: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
To: Guenter Roeck <linux@roeck-us.net>
Cc: Rob Herring <robh@kernel.org>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Scott Branden <scott.branden@broadcom.com>,
	linux-pci@vger.kernel.org, Jan Kiszka <jan.kiszka@siemens.com>,
	Ley Foon Tan <lftan@altera.com>,
	Russell King <linux@armlinux.org.uk>
Subject: Re: [v4] PCI: improve host drivers compile test coverage
Date: Wed, 13 Jun 2018 11:09:35 +0100	[thread overview]
Message-ID: <20180613100935.GA7707@e107981-ln.cambridge.arm.com> (raw)
In-Reply-To: <20180612170229.GA10141@roeck-us.net>

[+Jan, Ley Foon, RMK]

On Tue, Jun 12, 2018 at 10:02:29AM -0700, Guenter Roeck wrote:
> On Thu, Apr 05, 2018 at 02:31:54PM -0500, Rob Herring wrote:
> > Add COMPILE_TEST on driver config options with it. Some ARM drivers
> > still have arch dependencies, so we have to keep those dependent on ARM.
> > 
> > Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> > Cc: Bjorn Helgaas <bhelgaas@google.com>
> > Cc: linux-pci@vger.kernel.org
> > Signed-off-by: Rob Herring <robh@kernel.org>
> 
> This patch has the undesirable side effect that it selects PCI_DOMAINS for
> sparc32:allmodconfig, which in turn results in
> 
> 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'?
> 
> Unfortunately, 37bd62d224c82 ("PCI: Enable PCI_DOMAINS along with generic
> PCI host controller") has pretty much the same result. No idea how to fix
> the problem, so I won't even try.

Sorry about that.

One option would consist in removing all PCI_DOMAINS selection from
drivers/pci/controller/Kconfig and delegate it to arches even though
this would force PCI_DOMAINS selection on all ARM platforms (it is
already selected for ARCH_MULTIPLATFORM).

Or we add back arch dependency to the relevant host bridges.

Everything else I have in mind seems overkill to me given that this
patch was added to improve test coverage (we could add a default
pci_domain_nr() stub - weak or #define - that returns 0 in case arches
do not provide an implementation but do we really want to do that ?).

Thoughts appreciated.

Lorenzo

> Guenter
> 
> > ---
> > v4: Drop iProc hunks
> > 
> >  drivers/pci/dwc/Kconfig  | 24 ++++++++++++------------
> >  drivers/pci/host/Kconfig | 31 ++++++++++++++-----------------
> >  2 files changed, 26 insertions(+), 29 deletions(-)
> > 
> > diff --git a/drivers/pci/dwc/Kconfig b/drivers/pci/dwc/Kconfig
> > index 8c1a5167fb5b..2902544f5834 100644
> > --- a/drivers/pci/dwc/Kconfig
> > +++ b/drivers/pci/dwc/Kconfig
> > @@ -64,21 +64,21 @@ config PCIE_DW_PLAT
> >  
> >  config PCI_EXYNOS
> >  	bool "Samsung Exynos PCIe controller"
> > -	depends on SOC_EXYNOS5440
> > +	depends on SOC_EXYNOS5440 || COMPILE_TEST
> >  	depends on PCI_MSI_IRQ_DOMAIN
> >  	select PCIEPORTBUS
> >  	select PCIE_DW_HOST
> >  
> >  config PCI_IMX6
> >  	bool "Freescale i.MX6 PCIe controller"
> > -	depends on SOC_IMX6Q
> > +	depends on SOC_IMX6Q || (ARM && COMPILE_TEST)
> >  	depends on PCI_MSI_IRQ_DOMAIN
> >  	select PCIEPORTBUS
> >  	select PCIE_DW_HOST
> >  
> >  config PCIE_SPEAR13XX
> >  	bool "STMicroelectronics SPEAr PCIe controller"
> > -	depends on ARCH_SPEAR13XX
> > +	depends on ARCH_SPEAR13XX || COMPILE_TEST
> >  	depends on PCI_MSI_IRQ_DOMAIN
> >  	select PCIEPORTBUS
> >  	select PCIE_DW_HOST
> > @@ -87,7 +87,7 @@ config PCIE_SPEAR13XX
> >  
> >  config PCI_KEYSTONE
> >  	bool "TI Keystone PCIe controller"
> > -	depends on ARCH_KEYSTONE
> > +	depends on ARCH_KEYSTONE || (ARM && COMPILE_TEST)
> >  	depends on PCI_MSI_IRQ_DOMAIN
> >  	select PCIEPORTBUS
> >  	select PCIE_DW_HOST
> > @@ -99,7 +99,7 @@ config PCI_KEYSTONE
> >  
> >  config PCI_LAYERSCAPE
> >  	bool "Freescale Layerscape PCIe controller"
> > -	depends on OF && (ARM || ARCH_LAYERSCAPE)
> > +	depends on OF && (ARM || ARCH_LAYERSCAPE || COMPILE_TEST)
> >  	depends on PCI_MSI_IRQ_DOMAIN
> >  	select MFD_SYSCON
> >  	select PCIE_DW_HOST
> > @@ -107,7 +107,7 @@ config PCI_LAYERSCAPE
> >  	  Say Y here if you want PCIe controller support on Layerscape SoCs.
> >  
> >  config PCI_HISI
> > -	depends on OF && ARM64
> > +	depends on OF && (ARM64 || COMPILE_TEST)
> >  	bool "HiSilicon Hip05 and Hip06 SoCs PCIe controllers"
> >  	depends on PCI_MSI_IRQ_DOMAIN
> >  	select PCIEPORTBUS
> > @@ -119,7 +119,7 @@ config PCI_HISI
> >  
> >  config PCIE_QCOM
> >  	bool "Qualcomm PCIe controller"
> > -	depends on ARCH_QCOM && OF
> > +	depends on OF && (ARCH_QCOM || COMPILE_TEST)
> >  	depends on PCI_MSI_IRQ_DOMAIN
> >  	select PCIEPORTBUS
> >  	select PCIE_DW_HOST
> > @@ -130,7 +130,7 @@ config PCIE_QCOM
> >  
> >  config PCIE_ARMADA_8K
> >  	bool "Marvell Armada-8K PCIe controller"
> > -	depends on ARCH_MVEBU
> > +	depends on ARCH_MVEBU || COMPILE_TEST
> >  	depends on PCI_MSI_IRQ_DOMAIN
> >  	select PCIEPORTBUS
> >  	select PCIE_DW_HOST
> > @@ -145,7 +145,7 @@ config PCIE_ARTPEC6
> >  
> >  config PCIE_ARTPEC6_HOST
> >  	bool "Axis ARTPEC-6 PCIe controller Host Mode"
> > -	depends on MACH_ARTPEC6
> > +	depends on MACH_ARTPEC6 || COMPILE_TEST
> >  	depends on PCI_MSI_IRQ_DOMAIN
> >  	select PCIEPORTBUS
> >  	select PCIE_DW_HOST
> > @@ -156,7 +156,7 @@ config PCIE_ARTPEC6_HOST
> >  
> >  config PCIE_ARTPEC6_EP
> >  	bool "Axis ARTPEC-6 PCIe controller Endpoint Mode"
> > -	depends on MACH_ARTPEC6
> > +	depends on MACH_ARTPEC6 || COMPILE_TEST
> >  	depends on PCI_ENDPOINT
> >  	select PCIE_DW_EP
> >  	select PCIE_ARTPEC6
> > @@ -165,7 +165,7 @@ config PCIE_ARTPEC6_EP
> >  	  endpoint mode. This uses the DesignWare core.
> >  
> >  config PCIE_KIRIN
> > -	depends on OF && ARM64
> > +	depends on OF && (ARM64 || COMPILE_TEST)
> >  	bool "HiSilicon Kirin series SoCs PCIe controllers"
> >  	depends on PCI_MSI_IRQ_DOMAIN
> >  	select PCIEPORTBUS
> > @@ -176,7 +176,7 @@ config PCIE_KIRIN
> >  
> >  config PCIE_HISI_STB
> >  	bool "HiSilicon STB SoCs PCIe controllers"
> > -	depends on ARCH_HISI
> > +	depends on ARCH_HISI || COMPILE_TEST
> >  	depends on PCI_MSI_IRQ_DOMAIN
> >  	select PCIEPORTBUS
> >  	select PCIE_DW_HOST
> > diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig
> > index 0d0177ce436c..3d180b594ff2 100644
> > --- a/drivers/pci/host/Kconfig
> > +++ b/drivers/pci/host/Kconfig
> > @@ -5,13 +5,13 @@ menu "PCI host controller drivers"
> >  
> >  config PCI_MVEBU
> >  	bool "Marvell EBU PCIe controller"
> > -	depends on ARCH_MVEBU || ARCH_DOVE
> > +	depends on ARCH_MVEBU || ARCH_DOVE || COMPILE_TEST
> >  	depends on ARM
> >  	depends on OF
> >  
> >  config PCI_AARDVARK
> >  	bool "Aardvark PCIe controller"
> > -	depends on ARCH_MVEBU && ARM64
> > +	depends on (ARCH_MVEBU && ARM64) || COMPILE_TEST
> >  	depends on OF
> >  	depends on PCI_MSI_IRQ_DOMAIN
> >  	help
> > @@ -21,7 +21,7 @@ config PCI_AARDVARK
> >  
> >  config PCIE_XILINX_NWL
> >  	bool "NWL PCIe Core"
> > -	depends on ARCH_ZYNQMP
> > +	depends on ARCH_ZYNQMP || COMPILE_TEST
> >  	depends on PCI_MSI_IRQ_DOMAIN
> >  	help
> >  	 Say 'Y' here if you want kernel support for Xilinx
> > @@ -32,12 +32,11 @@ config PCIE_XILINX_NWL
> >  config PCI_FTPCI100
> >  	bool "Faraday Technology FTPCI100 PCI controller"
> >  	depends on OF
> > -	depends on ARM
> >  	default ARCH_GEMINI
> >  
> >  config PCI_TEGRA
> >  	bool "NVIDIA Tegra PCIe controller"
> > -	depends on ARCH_TEGRA
> > +	depends on ARCH_TEGRA || COMPILE_TEST
> >  	depends on PCI_MSI_IRQ_DOMAIN
> >  	help
> >  	  Say Y here if you want support for the PCIe host controller found
> > @@ -45,8 +44,8 @@ config PCI_TEGRA
> >  
> >  config PCI_RCAR_GEN2
> >  	bool "Renesas R-Car Gen2 Internal PCI controller"
> > -	depends on ARM
> >  	depends on ARCH_RENESAS || COMPILE_TEST
> > +	depends on ARM
> >  	help
> >  	  Say Y here if you want internal PCI support on R-Car Gen2 SoC.
> >  	  There are 3 internal PCI controllers available with a single
> > @@ -54,7 +53,7 @@ config PCI_RCAR_GEN2
> >  
> >  config PCIE_RCAR
> >  	bool "Renesas R-Car PCIe controller"
> > -	depends on ARCH_RENESAS || (ARM && COMPILE_TEST)
> > +	depends on ARCH_RENESAS || COMPILE_TEST
> >  	depends on PCI_MSI_IRQ_DOMAIN
> >  	help
> >  	  Say Y here if you want PCIe controller support on R-Car SoCs.
> > @@ -65,7 +64,7 @@ config PCI_HOST_COMMON
> >  
> >  config PCI_HOST_GENERIC
> >  	bool "Generic PCI host controller"
> > -	depends on (ARM || ARM64) && OF
> > +	depends on OF
> >  	select PCI_HOST_COMMON
> >  	select IRQ_DOMAIN
> >  	help
> > @@ -74,14 +73,14 @@ config PCI_HOST_GENERIC
> >  
> >  config PCIE_XILINX
> >  	bool "Xilinx AXI PCIe host bridge support"
> > -	depends on ARCH_ZYNQ || MICROBLAZE || (MIPS && PCI_DRIVERS_GENERIC)
> > +	depends on ARCH_ZYNQ || MICROBLAZE || (MIPS && PCI_DRIVERS_GENERIC) || COMPILE_TEST
> >  	help
> >  	  Say 'Y' here if you want kernel to support the Xilinx AXI PCIe
> >  	  Host Bridge driver.
> >  
> >  config PCI_XGENE
> >  	bool "X-Gene PCIe controller"
> > -	depends on ARM64
> > +	depends on ARM64 || COMPILE_TEST
> >  	depends on OF || (ACPI && PCI_QUIRKS)
> >  	select PCIEPORTBUS
> >  	help
> > @@ -101,7 +100,7 @@ config PCI_XGENE_MSI
> >  config PCI_V3_SEMI
> >  	bool "V3 Semiconductor PCI controller"
> >  	depends on OF
> > -	depends on ARM
> > +	depends on ARM || COMPILE_TEST
> >  	default ARCH_INTEGRATOR_AP
> >  
> >  config PCI_VERSATILE
> > @@ -147,8 +146,7 @@ config PCIE_IPROC_MSI
> >  
> >  config PCIE_ALTERA
> >  	bool "Altera PCIe controller"
> > -	depends on ARM || NIOS2
> > -	depends on OF_PCI
> > +	depends on ARM || NIOS2 || COMPILE_TEST
> >  	select PCI_DOMAINS
> >  	help
> >  	  Say Y here if you want to enable PCIe controller support on Altera
> > @@ -164,7 +162,7 @@ config PCIE_ALTERA_MSI
> >  
> >  config PCI_HOST_THUNDER_PEM
> >  	bool "Cavium Thunder PCIe controller to off-chip devices"
> > -	depends on ARM64
> > +	depends on ARM64 || COMPILE_TEST
> >  	depends on OF || (ACPI && PCI_QUIRKS)
> >  	select PCI_HOST_COMMON
> >  	help
> > @@ -172,7 +170,7 @@ config PCI_HOST_THUNDER_PEM
> >  
> >  config PCI_HOST_THUNDER_ECAM
> >  	bool "Cavium Thunder ECAM controller to on-chip devices on pass-1.x silicon"
> > -	depends on ARM64
> > +	depends on ARM64 || COMPILE_TEST
> >  	depends on OF || (ACPI && PCI_QUIRKS)
> >  	select PCI_HOST_COMMON
> >  	help
> > @@ -191,9 +189,8 @@ config PCIE_ROCKCHIP
> >  
> >  config PCIE_MEDIATEK
> >  	bool "MediaTek PCIe controller"
> > -	depends on (ARM || ARM64) && (ARCH_MEDIATEK || COMPILE_TEST)
> > +	depends on ARCH_MEDIATEK || COMPILE_TEST
> >  	depends on OF
> > -	depends on PCI
> >  	select PCIEPORTBUS
> >  	help
> >  	  Say Y here if you want to enable PCIe controller support on

  reply	other threads:[~2018-06-13 10:09 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-05 19:31 [PATCH v4] " Rob Herring
2018-05-18 21:42 ` Bjorn Helgaas
2018-05-19 19:22   ` Rob Herring
2018-06-12 17:02 ` [v4] " Guenter Roeck
2018-06-13 10:09   ` Lorenzo Pieralisi [this message]
2018-06-13 18:11     ` Guenter Roeck
2018-06-14 16:53       ` Lorenzo Pieralisi
2018-06-15 12:58       ` Lorenzo Pieralisi
2018-06-15 17:55         ` Scott Branden
2018-06-15 17:58           ` Scott Branden
2018-06-18 11:34             ` Lorenzo Pieralisi
2018-06-15 18:34           ` Rob Herring
2018-06-18  9:32             ` Lorenzo Pieralisi
2018-06-18 11:42               ` Jan Kiszka
2018-06-18 12:52                 ` Lorenzo Pieralisi
2018-06-18 16:53                   ` Jan Kiszka
2018-06-19  9:27                     ` Lorenzo Pieralisi

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