[PATCH 16/25] [POWERPC] Provide ability to setup P2P bridge registers from struct resource

[Benjamin Herrenschmidt]

On Mon, 2007-07-23 at 15:50 -0500, Kumar Gala wrote:
> We need the ability to set P2P bridge registers to properly setup the virtual
> P2P bridges that exist in PCIe controllers for some of the embedded setups.
> 
> Signed-off-by: Kumar Gala <galak at kernel.crashing.org>

Acked-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>

> ---
>  arch/powerpc/kernel/pci_32.c     |   18 ++++++++++++------
>  include/asm-powerpc/pci-bridge.h |    2 ++
>  2 files changed, 14 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
> index bfcfa14..721a694 100644
> --- a/arch/powerpc/kernel/pci_32.c
> +++ b/arch/powerpc/kernel/pci_32.c
> @@ -415,15 +415,13 @@ probe_resource(struct pci_bus *parent, struct resource *pr,
>  	return 0;
>  }
>  
> -static void __init
> -update_bridge_base(struct pci_bus *bus, int i)
> +void __init
> +update_bridge_resource(struct pci_dev *dev, struct resource *res)
>  {
> -	struct resource *res = bus->resource[i];
>  	u8 io_base_lo, io_limit_lo;
>  	u16 mem_base, mem_limit;
>  	u16 cmd;
>  	unsigned long start, end, off;
> -	struct pci_dev *dev = bus->self;
>  	struct pci_controller *hose = dev->sysdata;
>  
>  	if (!hose) {
> @@ -467,12 +465,20 @@ update_bridge_base(struct pci_bus *bus, int i)
>  		pci_write_config_word(dev, PCI_PREF_MEMORY_LIMIT, mem_limit);
>  
>  	} else {
> -		DBG(KERN_ERR "PCI: ugh, bridge %s res %d has flags=%lx\n",
> -		    pci_name(dev), i, res->flags);
> +		DBG(KERN_ERR "PCI: ugh, bridge %s res has flags=%lx\n",
> +		    pci_name(dev), res->flags);
>  	}
>  	pci_write_config_word(dev, PCI_COMMAND, cmd);
>  }
>  
> +static void __init
> +update_bridge_base(struct pci_bus *bus, int i)
> +{
> +	struct resource *res = bus->resource[i];
> +	struct pci_dev *dev = bus->self;
> +	update_bridge_resource(dev, res);
> +}
> +
>  static inline void alloc_resource(struct pci_dev *dev, int idx)
>  {
>  	struct resource *pr, *r = &dev->resource[idx];
> diff --git a/include/asm-powerpc/pci-bridge.h b/include/asm-powerpc/pci-bridge.h
> index 435bfe8..b7d2ea4 100644
> --- a/include/asm-powerpc/pci-bridge.h
> +++ b/include/asm-powerpc/pci-bridge.h
> @@ -93,6 +93,8 @@ extern int early_find_capability(struct pci_controller *hose, int bus,
>  extern void setup_indirect_pci(struct pci_controller* hose,
>  			       u32 cfg_addr, u32 cfg_data, u32 flags);
>  extern void setup_grackle(struct pci_controller *hose);
> +extern void __init update_bridge_resource(struct pci_dev *dev,
> +					  struct resource *res);
>  
>  #else
>