From mboxrd@z Thu Jan 1 00:00:00 1970 From: wangyijing@huawei.com (Yijing Wang) Date: Fri, 6 Mar 2015 17:33:22 +0800 Subject: [PATCH v5 05/29] PCI: Combine PCI domain and bus number in u32 arg In-Reply-To: <1425634426-437-1-git-send-email-wangyijing@huawei.com> References: <1425634426-437-1-git-send-email-wangyijing@huawei.com> Message-ID: <1425634426-437-6-git-send-email-wangyijing@huawei.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Currently, we use int type for bus number in pci_create_root_bus(), pci_scan_root_bus() and pci_scan_bus_legacy. Because PCI bus number always <= 255, so we could change the bus number argument type to u32, and combine PCI domain and bus number in one. Also add a domain member in pci_host_bridge to save domain number. Finally, we could eliminate lots of the platform specific pci_domain_nr() in the last of the series. Signed-off-by: Yijing Wang Signed-off-by: Bjorn Helgaas --- drivers/pci/probe.c | 16 +++++++++------- include/linux/pci.h | 7 ++++--- include/uapi/linux/pci.h | 3 +++ 3 files changed, 16 insertions(+), 10 deletions(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 699a238..e426354 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1889,7 +1889,7 @@ void __weak pcibios_remove_bus(struct pci_bus *bus) { } -struct pci_bus *pci_create_root_bus(struct device *parent, int bus, +struct pci_bus *pci_create_root_bus(struct device *parent, u32 db, struct pci_ops *ops, void *sysdata, struct list_head *resources) { int error; @@ -1900,6 +1900,7 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, resource_size_t offset; char bus_addr[64]; char *fmt; + u8 bus = PCI_BUSNUM(db); b = pci_alloc_bus(NULL); if (!b) @@ -1920,6 +1921,7 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, if (!bridge) goto err_out; + bridge->domain = PCI_DOMAIN(db); bridge->dev.parent = parent; bridge->dev.release = pci_release_host_bridge_dev; dev_set_name(&bridge->dev, "pci%04x:%02x", pci_domain_nr(b), bus); @@ -2057,7 +2059,7 @@ void pci_bus_release_busn_res(struct pci_bus *b) res, ret ? "can not be" : "is"); } -struct pci_bus *pci_scan_root_bus(struct device *parent, int bus, +struct pci_bus *pci_scan_root_bus(struct device *parent, u32 db, struct pci_ops *ops, void *sysdata, struct list_head *resources) { struct resource_entry *window; @@ -2071,15 +2073,15 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, int bus, break; } - b = pci_create_root_bus(parent, bus, ops, sysdata, resources); + b = pci_create_root_bus(parent, db, ops, sysdata, resources); if (!b) return NULL; if (!found) { dev_info(&b->dev, "No busn resource found for root bus, will use [bus %02x-ff]\n", - bus); - pci_bus_insert_busn_res(b, bus, 255); + PCI_BUSNUM(db)); + pci_bus_insert_busn_res(b, PCI_BUSNUM(db), 255); } max = pci_scan_child_bus(b); @@ -2091,7 +2093,7 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, int bus, } EXPORT_SYMBOL(pci_scan_root_bus); -struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, +struct pci_bus *pci_scan_bus(u32 db, struct pci_ops *ops, void *sysdata) { LIST_HEAD(resources); @@ -2100,7 +2102,7 @@ struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, pci_add_resource(&resources, &ioport_resource); pci_add_resource(&resources, &iomem_resource); pci_add_resource(&resources, &busn_resource); - b = pci_create_root_bus(NULL, bus, ops, sysdata, &resources); + b = pci_create_root_bus(NULL, db, ops, sysdata, &resources); if (b) { pci_scan_child_bus(b); } else { diff --git a/include/linux/pci.h b/include/linux/pci.h index 36effb8..8b3d245 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -401,6 +401,7 @@ static inline int pci_channel_offline(struct pci_dev *pdev) } struct pci_host_bridge { + u16 domain; struct device dev; struct pci_bus *bus; /* root bus */ struct list_head windows; /* resource_entry */ @@ -769,14 +770,14 @@ void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res, void pcibios_scan_specific_bus(int busn); struct pci_bus *pci_find_bus(int domain, int busnr); void pci_bus_add_devices(const struct pci_bus *bus); -struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata); -struct pci_bus *pci_create_root_bus(struct device *parent, int bus, +struct pci_bus *pci_scan_bus(u32 dombus, struct pci_ops *ops, void *sysdata); +struct pci_bus *pci_create_root_bus(struct device *parent, u32 dombus, struct pci_ops *ops, void *sysdata, struct list_head *resources); int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax); int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax); void pci_bus_release_busn_res(struct pci_bus *b); -struct pci_bus *pci_scan_root_bus(struct device *parent, int bus, +struct pci_bus *pci_scan_root_bus(struct device *parent, u32 dombus, struct pci_ops *ops, void *sysdata, struct list_head *resources); struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, diff --git a/include/uapi/linux/pci.h b/include/uapi/linux/pci.h index 3c292bc..89c6f15 100644 --- a/include/uapi/linux/pci.h +++ b/include/uapi/linux/pci.h @@ -30,6 +30,9 @@ #define PCI_DEVFN(slot, func) ((((slot) & 0x1f) << 3) | ((func) & 0x07)) #define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f) #define PCI_FUNC(devfn) ((devfn) & 0x07) +#define PCI_DOMAIN(db) ((db) >> 16) +#define PCI_BUSNUM(db) ((db) & 0xffff) +#define PCI_DOMBUS(domain, bus) (((domain) << 16) | (bus)) /* Ioctls for /proc/bus/pci/X/Y nodes. */ #define PCIIOC_BASE ('P' << 24 | 'C' << 16 | 'I' << 8) -- 1.7.1