On Thu, Oct 10, 2024 at 12:32:00PM +0200, Michał Winiarski wrote:
> There are multiple places where special handling is required for IOV
> resources.
> Extract it to a helper and drop a few ifdefs.
Add blank line between paragraphs.
Include name of helper in subject line and commit log, i.e.,
pci_resource_is_iov(). No point in guessing or making us extract it
from the patch. This will also make the commit log say more clearly
what the patch does.
> Signed-off-by: Michał Winiarski <michal.winiarski@xxxxxxxxx>
> ---
> drivers/pci/pci.h | 18 ++++++++++++++----
> drivers/pci/setup-bus.c | 5 +----
> drivers/pci/setup-res.c | 4 +---
> 3 files changed, 16 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
> index 14d00ce45bfa9..c55f2d7a4f37e 100644
> --- a/drivers/pci/pci.h
> +++ b/drivers/pci/pci.h
> @@ -580,6 +580,10 @@ void pci_iov_update_resource(struct pci_dev *dev, int resno);
> resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno);
> void pci_restore_iov_state(struct pci_dev *dev);
> int pci_iov_bus_range(struct pci_bus *bus);
> +static inline bool pci_resource_is_iov(int resno)
> +{
> + return resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END;
> +}
> extern const struct attribute_group sriov_pf_dev_attr_group;
> extern const struct attribute_group sriov_vf_dev_attr_group;
> #else
> @@ -589,12 +593,20 @@ static inline int pci_iov_init(struct pci_dev *dev)
> }
> static inline void pci_iov_release(struct pci_dev *dev) { }
> static inline void pci_iov_remove(struct pci_dev *dev) { }
> +static inline void pci_iov_update_resource(struct pci_dev *dev, int resno) { }
> +static inline resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno)
> +{
> + return 0;
> +}
> static inline void pci_restore_iov_state(struct pci_dev *dev) { }
> static inline int pci_iov_bus_range(struct pci_bus *bus)
> {
> return 0;
> }
> -
> +static inline bool pci_resource_is_iov(int resno)
> +{
> + return false;
> +}
> #endif /* CONFIG_PCI_IOV */
>
> #ifdef CONFIG_PCIE_PTM
> @@ -616,12 +628,10 @@ unsigned long pci_cardbus_resource_alignment(struct resource *);
> static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
> struct resource *res)
> {
> -#ifdef CONFIG_PCI_IOV
> int resno = res - dev->resource;
>
> - if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END)
> + if (pci_resource_is_iov(resno))
> return pci_sriov_resource_alignment(dev, resno);
> -#endif
> if (dev->class >> 8 == PCI_CLASS_BRIDGE_CARDBUS)
> return pci_cardbus_resource_alignment(res);
> return resource_alignment(res);
> diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
> index 23082bc0ca37a..8909948bc9a9f 100644
> --- a/drivers/pci/setup-bus.c
> +++ b/drivers/pci/setup-bus.c
> @@ -1093,17 +1093,14 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
> (r->flags & mask) != type3))
> continue;
> r_size = resource_size(r);
> -#ifdef CONFIG_PCI_IOV
> /* Put SRIOV requested res to the optional list */
> - if (realloc_head && i >= PCI_IOV_RESOURCES &&
> - i <= PCI_IOV_RESOURCE_END) {
> + if (realloc_head && pci_resource_is_iov(i)) {
> add_align = max(pci_resource_alignment(dev, r), add_align);
> r->end = r->start - 1;
> add_to_list(realloc_head, dev, r, r_size, 0 /* Don't care */);
> children_add_size += r_size;
> continue;
> }
> -#endif
> /*
> * aligns[0] is for 1MB (since bridge memory
> * windows are always at least 1MB aligned), so
> diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
> index c6d933ddfd464..e2cf79253ebda 100644
> --- a/drivers/pci/setup-res.c
> +++ b/drivers/pci/setup-res.c
> @@ -127,10 +127,8 @@ void pci_update_resource(struct pci_dev *dev, int resno)
> {
> if (resno <= PCI_ROM_RESOURCE)
> pci_std_update_resource(dev, resno);
> -#ifdef CONFIG_PCI_IOV
> - else if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END)
> + else if (pci_resource_is_iov(resno))
> pci_iov_update_resource(dev, resno);
> -#endif
> }
>
> int pci_claim_resource(struct pci_dev *dev, int resource)
> --
> 2.47.0
>
