Given the usage of 3/4, u32 pci_find_capability(bdf, cap) would be more direct.
Maybe this is a matter of taste, though.
On Sat, Aug 28, 2010 at 06:02:56PM +0300, Eduard - Gabriel Munteanu wrote:
> This iterates over capabilities exposed by PCI devices. It's needed by
> IOMMU initialization code to discover the Secure Device capability.
>
> Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@xxxxxxxxxxx>
> ---
> src/pci.h | 5 +++++
> 1 files changed, 5 insertions(+), 0 deletions(-)
>
> diff --git a/src/pci.h b/src/pci.h
> index 9c3108c..60e0359 100644
> --- a/src/pci.h
> +++ b/src/pci.h
> @@ -2,6 +2,7 @@
> #define __PCI_H
>
> #include "types.h" // u32
> +#include "pci_regs.h" // PCI_CAPABILITY_LIST et al.
>
> static inline u8 pci_bdf_to_bus(u16 bdf) {
> return bdf >> 8;
> @@ -52,6 +53,10 @@ int pci_next(int bdf, int *pmax);
> for (MAX=0x0100, BDF=pci_next(0, &MAX) \
> ; BDF >= 0 \
> ; BDF=pci_next(BDF+1, &MAX))
> +#define foreachcap(BDF, PTR, CAP) \
> + for (PTR = PCI_CAPABILITY_LIST, CAP = pci_config_readb(BDF, PTR); \
> + CAP; \
> + PTR = CAP + PCI_CAP_LIST_NEXT, CAP = pci_config_readb(BDF, PTR))
>
> #define foreachpci_in_bus(BDF, MAX, BUS) \
> for (MAX = pci_bus_devfn_to_bdf(BUS, 0) + 0x0100, \
> --
> 1.7.1
>
>
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yamahata
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