On Thu, Feb 26, 2015 at 04:12:06PM +0800, Yijing Wang wrote:
> Now we have weak functions like pcibios_root_bridge_prepare()
> to setup pci host bridge, We could introduce pci_host_bridge_ops
> which contain host bridge specific ops to setup pci_host_bridge.
> Then host bridge driver could add pci_host_bridge_ops hooks
> intead of weak function to setup pci_host_bridge.
> This patch add following pci_host_bridge_ops hooks:
>
> pci_host_bridge_ops {
> /* set root bus speed, some platform need this like powerpc */
> void (*phb_set_root_bus_speed)(struct pci_host_bridge *host);
> /* setup pci_host_bridge before pci_host_bridge be added to driver core */
> int (*phb_prepare)(struct pci_host_bridge *host);
> /* platform specific of scan hook to scan pci device */
> void (*phb_of_scan_bus)(struct pci_host_bridge *);
> }
> We could easily extend it to support different host bridge
> specific operations.
>
> Signed-off-by: Yijing Wang <wangyijing@xxxxxxxxxx>
> ---
> drivers/pci/host-bridge.c | 12 ++++++++++--
> drivers/pci/probe.c | 17 +++++++++++------
> include/linux/pci.h | 12 ++++++++++--
> 3 files changed, 31 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c
> index b42a4bb..4a2baa2 100644
> --- a/drivers/pci/host-bridge.c
> +++ b/drivers/pci/host-bridge.c
> @@ -23,8 +23,8 @@ static void pci_release_host_bridge_dev(struct device *dev)
> }
>
> struct pci_host_bridge *pci_create_host_bridge(
> - struct device *parent, u32 db,
> - struct list_head *resources, void *sysdata)
> + struct device *parent, u32 db, struct list_head *resources,
> + void *sysdata, struct pci_host_bridge_ops *ops)
> {
> int error;
> int bus = PCI_BUSNUM(db);
> @@ -56,6 +56,7 @@ struct pci_host_bridge *pci_create_host_bridge(
> }
> mutex_unlock(&phb_mutex);
>
> + host->ops = ops;
> host->dev.parent = parent;
> INIT_LIST_HEAD(&host->windows);
> host->dev.release = pci_release_host_bridge_dev;
> @@ -63,6 +64,13 @@ struct pci_host_bridge *pci_create_host_bridge(
> dev_set_name(&host->dev, "pci%04x:%02x", host->domain,
> host->busnum);
>
> + if (host->ops && host->ops->phb_prepare) {
> + error = host->ops->phb_prepare(host);
> + if(error) {
Whitespace error.
> --- a/include/linux/pci.h
> +++ b/include/linux/pci.h
> @@ -400,6 +400,13 @@ static inline int pci_channel_offline(struct pci_dev *pdev)
> return (pdev->error_state != pci_channel_io_normal);
> }
>
> +struct pci_host_bridge;
> +struct pci_host_bridge_ops {
> + void (*phb_set_root_bus_speed)(struct pci_host_bridge *host);
> + int (*phb_prepare)(struct pci_host_bridge *host);
> + void (*phb_of_scan_bus)(struct pci_host_bridge *);
These function pointers don't need a "phb_" prefix.
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