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Message-ID: <20210723145026.GA3330@lpieralisi>
Date: Fri, 23 Jul 2021 15:50:26 +0100
From: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To: Arnd Bergmann <arnd@...nel.org>
Cc: Linus Walleij <linusw@...nel.org>, soc@...nel.org,
Arnd Bergmann <arnd@...db.de>, Imre Kaloz <kaloz@...nwrt.org>,
Krzysztof Halasa <khalasa@...p.pl>,
Rob Herring <robh@...nel.org>,
Krzysztof Wilczyński <kw@...ux.com>,
Bjorn Helgaas <bhelgaas@...gle.com>,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-pci@...r.kernel.org
Subject: Re: [PATCH] ARM: ixp4xx: fix building both pci drivers
On Wed, Jul 21, 2021 at 05:15:22PM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
>
> When both the old and the new PCI drivers are enabled
> in the same kernel, there are a couple of namespace
> conflicts that cause a build failure:
>
> drivers/pci/controller/pci-ixp4xx.c:38: error: "IXP4XX_PCI_CSR" redefined [-Werror]
> 38 | #define IXP4XX_PCI_CSR 0x1c
> |
> In file included from arch/arm/mach-ixp4xx/include/mach/hardware.h:23,
> from arch/arm/mach-ixp4xx/include/mach/io.h:15,
> from arch/arm/include/asm/io.h:198,
> from include/linux/io.h:13,
> from drivers/pci/controller/pci-ixp4xx.c:20:
> arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h:221: note: this is the location of the previous definition
> 221 | #define IXP4XX_PCI_CSR(x) ((volatile u32 *)(IXP4XX_PCI_CFG_BASE_VIRT+(x)))
> |
> drivers/pci/controller/pci-ixp4xx.c:148:12: error: 'ixp4xx_pci_read' redeclared as different kind of symbol
> 148 | static int ixp4xx_pci_read(struct ixp4xx_pci *p, u32 addr, u32 cmd, u32 *data)
> | ^~~~~~~~~~~~~~~
>
> Rename both the ixp4xx_pci_read/ixp4xx_pci_write functions and the
> IXP4XX_PCI_CSR macro. In each case, I went with the version that
> has fewer callers to keep the change small.
>
> Fixes: f7821b493458 ("PCI: ixp4xx: Add a new driver for IXP4xx")
> Cc: soc@...nel.org
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
> .../mach-ixp4xx/include/mach/ixp4xx-regs.h | 48 +++++++++----------
> drivers/pci/controller/pci-ixp4xx.c | 8 ++--
> 2 files changed, 28 insertions(+), 28 deletions(-)
Are you picking this up via arm-soc ? I can take this via the PCI tree,
just let me know:
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
> diff --git a/arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h b/arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h
> index abb07f105515..74e63d4531aa 100644
> --- a/arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h
> +++ b/arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h
> @@ -218,30 +218,30 @@
> /*
> * PCI Control/Status Registers
> */
> -#define IXP4XX_PCI_CSR(x) ((volatile u32 *)(IXP4XX_PCI_CFG_BASE_VIRT+(x)))
> -
> -#define PCI_NP_AD IXP4XX_PCI_CSR(PCI_NP_AD_OFFSET)
> -#define PCI_NP_CBE IXP4XX_PCI_CSR(PCI_NP_CBE_OFFSET)
> -#define PCI_NP_WDATA IXP4XX_PCI_CSR(PCI_NP_WDATA_OFFSET)
> -#define PCI_NP_RDATA IXP4XX_PCI_CSR(PCI_NP_RDATA_OFFSET)
> -#define PCI_CRP_AD_CBE IXP4XX_PCI_CSR(PCI_CRP_AD_CBE_OFFSET)
> -#define PCI_CRP_WDATA IXP4XX_PCI_CSR(PCI_CRP_WDATA_OFFSET)
> -#define PCI_CRP_RDATA IXP4XX_PCI_CSR(PCI_CRP_RDATA_OFFSET)
> -#define PCI_CSR IXP4XX_PCI_CSR(PCI_CSR_OFFSET)
> -#define PCI_ISR IXP4XX_PCI_CSR(PCI_ISR_OFFSET)
> -#define PCI_INTEN IXP4XX_PCI_CSR(PCI_INTEN_OFFSET)
> -#define PCI_DMACTRL IXP4XX_PCI_CSR(PCI_DMACTRL_OFFSET)
> -#define PCI_AHBMEMBASE IXP4XX_PCI_CSR(PCI_AHBMEMBASE_OFFSET)
> -#define PCI_AHBIOBASE IXP4XX_PCI_CSR(PCI_AHBIOBASE_OFFSET)
> -#define PCI_PCIMEMBASE IXP4XX_PCI_CSR(PCI_PCIMEMBASE_OFFSET)
> -#define PCI_AHBDOORBELL IXP4XX_PCI_CSR(PCI_AHBDOORBELL_OFFSET)
> -#define PCI_PCIDOORBELL IXP4XX_PCI_CSR(PCI_PCIDOORBELL_OFFSET)
> -#define PCI_ATPDMA0_AHBADDR IXP4XX_PCI_CSR(PCI_ATPDMA0_AHBADDR_OFFSET)
> -#define PCI_ATPDMA0_PCIADDR IXP4XX_PCI_CSR(PCI_ATPDMA0_PCIADDR_OFFSET)
> -#define PCI_ATPDMA0_LENADDR IXP4XX_PCI_CSR(PCI_ATPDMA0_LENADDR_OFFSET)
> -#define PCI_ATPDMA1_AHBADDR IXP4XX_PCI_CSR(PCI_ATPDMA1_AHBADDR_OFFSET)
> -#define PCI_ATPDMA1_PCIADDR IXP4XX_PCI_CSR(PCI_ATPDMA1_PCIADDR_OFFSET)
> -#define PCI_ATPDMA1_LENADDR IXP4XX_PCI_CSR(PCI_ATPDMA1_LENADDR_OFFSET)
> +#define _IXP4XX_PCI_CSR(x) ((volatile u32 *)(IXP4XX_PCI_CFG_BASE_VIRT+(x)))
> +
> +#define PCI_NP_AD _IXP4XX_PCI_CSR(PCI_NP_AD_OFFSET)
> +#define PCI_NP_CBE _IXP4XX_PCI_CSR(PCI_NP_CBE_OFFSET)
> +#define PCI_NP_WDATA _IXP4XX_PCI_CSR(PCI_NP_WDATA_OFFSET)
> +#define PCI_NP_RDATA _IXP4XX_PCI_CSR(PCI_NP_RDATA_OFFSET)
> +#define PCI_CRP_AD_CBE _IXP4XX_PCI_CSR(PCI_CRP_AD_CBE_OFFSET)
> +#define PCI_CRP_WDATA _IXP4XX_PCI_CSR(PCI_CRP_WDATA_OFFSET)
> +#define PCI_CRP_RDATA _IXP4XX_PCI_CSR(PCI_CRP_RDATA_OFFSET)
> +#define PCI_CSR _IXP4XX_PCI_CSR(PCI_CSR_OFFSET)
> +#define PCI_ISR _IXP4XX_PCI_CSR(PCI_ISR_OFFSET)
> +#define PCI_INTEN _IXP4XX_PCI_CSR(PCI_INTEN_OFFSET)
> +#define PCI_DMACTRL _IXP4XX_PCI_CSR(PCI_DMACTRL_OFFSET)
> +#define PCI_AHBMEMBASE _IXP4XX_PCI_CSR(PCI_AHBMEMBASE_OFFSET)
> +#define PCI_AHBIOBASE _IXP4XX_PCI_CSR(PCI_AHBIOBASE_OFFSET)
> +#define PCI_PCIMEMBASE _IXP4XX_PCI_CSR(PCI_PCIMEMBASE_OFFSET)
> +#define PCI_AHBDOORBELL _IXP4XX_PCI_CSR(PCI_AHBDOORBELL_OFFSET)
> +#define PCI_PCIDOORBELL _IXP4XX_PCI_CSR(PCI_PCIDOORBELL_OFFSET)
> +#define PCI_ATPDMA0_AHBADDR _IXP4XX_PCI_CSR(PCI_ATPDMA0_AHBADDR_OFFSET)
> +#define PCI_ATPDMA0_PCIADDR _IXP4XX_PCI_CSR(PCI_ATPDMA0_PCIADDR_OFFSET)
> +#define PCI_ATPDMA0_LENADDR _IXP4XX_PCI_CSR(PCI_ATPDMA0_LENADDR_OFFSET)
> +#define PCI_ATPDMA1_AHBADDR _IXP4XX_PCI_CSR(PCI_ATPDMA1_AHBADDR_OFFSET)
> +#define PCI_ATPDMA1_PCIADDR _IXP4XX_PCI_CSR(PCI_ATPDMA1_PCIADDR_OFFSET)
> +#define PCI_ATPDMA1_LENADDR _IXP4XX_PCI_CSR(PCI_ATPDMA1_LENADDR_OFFSET)
>
> /*
> * PCI register values and bit definitions
> diff --git a/drivers/pci/controller/pci-ixp4xx.c b/drivers/pci/controller/pci-ixp4xx.c
> index 896a45b24236..654ac4a82beb 100644
> --- a/drivers/pci/controller/pci-ixp4xx.c
> +++ b/drivers/pci/controller/pci-ixp4xx.c
> @@ -145,7 +145,7 @@ static int ixp4xx_pci_check_master_abort(struct ixp4xx_pci *p)
> return 0;
> }
>
> -static int ixp4xx_pci_read(struct ixp4xx_pci *p, u32 addr, u32 cmd, u32 *data)
> +static int ixp4xx_pci_read_indirect(struct ixp4xx_pci *p, u32 addr, u32 cmd, u32 *data)
> {
> ixp4xx_writel(p, IXP4XX_PCI_NP_AD, addr);
>
> @@ -170,7 +170,7 @@ static int ixp4xx_pci_read(struct ixp4xx_pci *p, u32 addr, u32 cmd, u32 *data)
> return ixp4xx_pci_check_master_abort(p);
> }
>
> -static int ixp4xx_pci_write(struct ixp4xx_pci *p, u32 addr, u32 cmd, u32 data)
> +static int ixp4xx_pci_write_indirect(struct ixp4xx_pci *p, u32 addr, u32 cmd, u32 data)
> {
> ixp4xx_writel(p, IXP4XX_PCI_NP_AD, addr);
>
> @@ -308,7 +308,7 @@ static int ixp4xx_pci_read_config(struct pci_bus *bus, unsigned int devfn,
> dev_dbg(p->dev, "read_config from %d size %d dev %d:%d:%d address: %08x cmd: %08x\n",
> where, size, bus_num, PCI_SLOT(devfn), PCI_FUNC(devfn), addr, cmd);
>
> - ret = ixp4xx_pci_read(p, addr, cmd, &val);
> + ret = ixp4xx_pci_read_indirect(p, addr, cmd, &val);
> if (ret)
> return PCIBIOS_DEVICE_NOT_FOUND;
>
> @@ -356,7 +356,7 @@ static int ixp4xx_pci_write_config(struct pci_bus *bus, unsigned int devfn,
> dev_dbg(p->dev, "write_config_byte %#x to %d size %d dev %d:%d:%d addr: %08x cmd %08x\n",
> value, where, size, bus_num, PCI_SLOT(devfn), PCI_FUNC(devfn), addr, cmd);
>
> - ret = ixp4xx_pci_write(p, addr, cmd, val);
> + ret = ixp4xx_pci_write_indirect(p, addr, cmd, val);
> if (ret)
> return PCIBIOS_DEVICE_NOT_FOUND;
>
> --
> 2.29.2
>
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