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Message-ID: <CAOesGMh2Dz2HWpAg0Yh71QYfnAyMRae929p=mqGmopGdrVWgxQ@mail.gmail.com>
Date: Tue, 28 Jul 2015 15:24:00 +0200
From: Olof Johansson <olof@...om.net>
To: Ray Jui <rjui@...adcom.com>
Cc: Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will.deacon@....com>,
Arnd Bergmann <arnd@...db.de>,
Mark Rutland <mark.rutland@....com>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Hauke Mehrtens <hauke@...ke-m.de>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Broadcom Kernel Feedback List
<bcm-kernel-feedback-list@...adcom.com>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"arm@...nel.org" <arm@...nel.org>,
"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
Subject: Re: [PATCH v5 1/4] PCI: iproc: enable arm64 support for iProc PCIe
Hi Ray,
I get the following when building an allmodconfig on arm64:
drivers/pci/host/pcie-iproc-bcma.c: In function 'iproc_pcie_bcma_map_irq':
drivers/pci/host/pcie-iproc-bcma.c:37:31: error: dereferencing pointer
to incomplete type
struct iproc_pcie *pcie = sys->private_data;
^
Should be easy for you to reproduce, please send incremental fix.
-Olof
On Tue, Jul 28, 2015 at 12:42 AM, Ray Jui <rjui@...adcom.com> wrote:
> PCI: iproc: Add arm64 support
>
> Add arm64 support to the iProc PCIe driver.
>
> Note that on arm32, bus->sysdata points to the arm32-specific
> pci_sys_data struct, and pci_sys_data.private_data contains the
> iproc_pcie pointer. For arm64, there's nothing corresponding to
> pci_sys_data, so we keep the iproc_pcie pointer directly in
> bus->sysdata.
>
> In addition, arm64 does IRQ mapping in pcibios_add_device(), so it
> doesn't need pci_fixup_irqs() as arm32 does.
>
> Signed-off-by: Ray Jui <rjui@...adcom.com>
> Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
> Reviewed-by: Scott Branden <sbranden@...adcom.com>
> Acked-by: Bjorn Helgaas <bhelgaas@...gle.com>
> ---
> drivers/pci/host/pcie-iproc.c | 27 ++++++++++++++++++++-------
> drivers/pci/host/pcie-iproc.h | 4 +++-
> 2 files changed, 23 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/pci/host/pcie-iproc.c b/drivers/pci/host/pcie-iproc.c
> index d77481e..ba087b5 100644
> --- a/drivers/pci/host/pcie-iproc.c
> +++ b/drivers/pci/host/pcie-iproc.c
> @@ -58,9 +58,17 @@
> #define SYS_RC_INTX_EN 0x330
> #define SYS_RC_INTX_MASK 0xf
>
> -static inline struct iproc_pcie *sys_to_pcie(struct pci_sys_data *sys)
> +static inline struct iproc_pcie *iproc_data(struct pci_bus *bus)
> {
> - return sys->private_data;
> + struct iproc_pcie *pcie;
> +#ifdef CONFIG_ARM
> + struct pci_sys_data *sys = bus->sysdata;
> +
> + pcie = sys->private_data;
> +#else
> + pcie = bus->sysdata;
> +#endif
> + return pcie;
> }
>
> /**
> @@ -71,8 +79,7 @@ static void __iomem *iproc_pcie_map_cfg_bus(struct pci_bus *bus,
> unsigned int devfn,
> int where)
> {
> - struct pci_sys_data *sys = bus->sysdata;
> - struct iproc_pcie *pcie = sys_to_pcie(sys);
> + struct iproc_pcie *pcie = iproc_data(bus);
> unsigned slot = PCI_SLOT(devfn);
> unsigned fn = PCI_FUNC(devfn);
> unsigned busno = bus->number;
> @@ -186,6 +193,7 @@ static void iproc_pcie_enable(struct iproc_pcie *pcie)
> int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
> {
> int ret;
> + void *sysdata;
> struct pci_bus *bus;
>
> if (!pcie || !pcie->dev || !pcie->base)
> @@ -208,10 +216,13 @@ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
>
> iproc_pcie_reset(pcie);
>
> +#ifdef CONFIG_ARM
> pcie->sysdata.private_data = pcie;
> -
> - bus = pci_create_root_bus(pcie->dev, 0, &iproc_pcie_ops,
> - &pcie->sysdata, res);
> + sysdata = &pcie->sysdata;
> +#else
> + sysdata = pcie;
> +#endif
> + bus = pci_create_root_bus(pcie->dev, 0, &iproc_pcie_ops, sysdata, res);
> if (!bus) {
> dev_err(pcie->dev, "unable to create PCI root bus\n");
> ret = -ENOMEM;
> @@ -229,7 +240,9 @@ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
>
> pci_scan_child_bus(bus);
> pci_assign_unassigned_bus_resources(bus);
> +#ifdef CONFIG_ARM
> pci_fixup_irqs(pci_common_swizzle, pcie->map_irq);
> +#endif
> pci_bus_add_devices(bus);
>
> return 0;
> diff --git a/drivers/pci/host/pcie-iproc.h b/drivers/pci/host/pcie-iproc.h
> index ba0a108..c9e4c10 100644
> --- a/drivers/pci/host/pcie-iproc.h
> +++ b/drivers/pci/host/pcie-iproc.h
> @@ -21,7 +21,7 @@
> * @dev: pointer to device data structure
> * @base: PCIe host controller I/O register base
> * @resources: linked list of all PCI resources
> - * @sysdata: Per PCI controller data
> + * @sysdata: Per PCI controller data (ARM-specific)
> * @root_bus: pointer to root bus
> * @phy: optional PHY device that controls the Serdes
> * @irqs: interrupt IDs
> @@ -29,7 +29,9 @@
> struct iproc_pcie {
> struct device *dev;
> void __iomem *base;
> +#ifdef CONFIG_ARM
> struct pci_sys_data sysdata;
> +#endif
> struct pci_bus *root_bus;
> struct phy *phy;
> int irqs[IPROC_PCIE_MAX_NUM_IRQS];
> --
> 1.7.9.5
>
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