On 2015/7/25 11:21, Zhou Wang wrote:
> From: Gabriele Paoloni <gabriele.paoloni@xxxxxxxxxx>
>
> This patch is needed in order to unify the PCIe designware framework for ARM and
> ARM64 architectures. In the PCIe designware unification process we are calling
> pci_create_root_bus() passing a "sysdata" parameter that is the same for both
> ARM and ARM64 and is of type "struct pcie_port*". In the ARM case this will
> cause a problem with the function pcibios_align_resource(); in fact this will
> cast "dev->sysdata" to "struct pci_sys_data*", whereas designware had passed a
> "struct pcie_port*" pointer.
>
> This patch solves the issue by removing "align_resource" from "pci_sys_data"
> struct and defining a static global function pointer in "bios32.c"
>
> Signed-off-by: Gabriele Paoloni <gabriele.paoloni@xxxxxxxxxx>
Hi Arnd and Rob,
What is your opinion about this patch? Gabriele adds a global pointer in bios32.c
to store align_resource, so we could remove sys->align_resource in pcibios_align_resource.
As Lorenzo mentioned in v4 series, this is a temporary solution before moving
align_resource to host bridge structure.
Any comments welcome.
Thanks,
Zhou
> ---
> arch/arm/include/asm/mach/pci.h | 5 -----
> arch/arm/kernel/bios32.c | 12 ++++++++----
> 2 files changed, 8 insertions(+), 9 deletions(-)
>
> diff --git a/arch/arm/include/asm/mach/pci.h b/arch/arm/include/asm/mach/pci.h
> index 28b9bb3..8a4e4de 100644
> --- a/arch/arm/include/asm/mach/pci.h
> +++ b/arch/arm/include/asm/mach/pci.h
> @@ -58,11 +58,6 @@ struct pci_sys_data {
> /* IRQ mapping */
> int (*map_irq)(const struct pci_dev *, u8, u8);
> /* Resource alignement requirements */
> - resource_size_t (*align_resource)(struct pci_dev *dev,
> - const struct resource *res,
> - resource_size_t start,
> - resource_size_t size,
> - resource_size_t align);
> void *private_data; /* platform controller private data */
> };
>
> diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
> index fcbbbb1..4cdc64d 100644
> --- a/arch/arm/kernel/bios32.c
> +++ b/arch/arm/kernel/bios32.c
> @@ -17,6 +17,11 @@
> #include <asm/mach/pci.h>
>
> static int debug_pci;
> +static resource_size_t (*align_resource)(struct pci_dev *dev,
> + const struct resource *res,
> + resource_size_t start,
> + resource_size_t size,
> + resource_size_t align) = NULL;
>
> #ifdef CONFIG_PCI_MSI
> struct msi_controller *pcibios_msi_controller(struct pci_dev *dev)
> @@ -468,7 +473,7 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
> sys->busnr = busnr;
> sys->swizzle = hw->swizzle;
> sys->map_irq = hw->map_irq;
> - sys->align_resource = hw->align_resource;
> + align_resource = hw->align_resource;
> INIT_LIST_HEAD(&sys->resources);
>
> if (hw->private_data)
> @@ -589,7 +594,6 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res,
> resource_size_t size, resource_size_t align)
> {
> struct pci_dev *dev = data;
> - struct pci_sys_data *sys = dev->sysdata;
> resource_size_t start = res->start;
>
> if (res->flags & IORESOURCE_IO && start & 0x300)
> @@ -597,8 +601,8 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res,
>
> start = (start + align - 1) & ~(align - 1);
>
> - if (sys->align_resource)
> - return sys->align_resource(dev, res, start, size, align);
> + if (align_resource)
> + return align_resource(dev, res, start, size, align);
>
> return start;
> }
>
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