From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yijing Wang Subject: [PATCH v9 29/30] PCI: Remove pci_bus_assign_domain_nr() Date: Fri, 3 Apr 2015 17:26:03 +0800 Message-ID: <1428053164-28277-31-git-send-email-wangyijing__7477.13875393874$1428053453$gmane$org@huawei.com> References: <1428053164-28277-1-git-send-email-wangyijing@huawei.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1428053164-28277-1-git-send-email-wangyijing@huawei.com> Sender: linux-m68k-owner@vger.kernel.org List-Id: linux-m68k@vger.kernel.org To: Bjorn Helgaas Cc: Jiang Liu , linux-pci@vger.kernel.org, Yinghai Lu , linux-kernel@vger.kernel.org, Marc Zyngier , linux-arm-kernel@lists.infradead.org, Russell King , dja@axtens.net, x86@kernel.org, Thomas Gleixner , Benjamin Herrenschmidt , Rusty Russell , Tony Luck , linux-ia64@vger.kernel.org, "David S. Miller" , Guan Xuetao , linux-alpha@vger.kernel.org, linux-m68k@lists.linux-m68k.org, Liviu Dudau , Arnd Bergmann , Geert Uytterhoeven , Yijing Wang Now we save the domain number in pci_host_bridge, we could remove pci_bus_assign_domain_nr() and clean the domain member in pci_bus. Also move pci_host_assign_domain_nr() to drivers/pci/host-bridge.c for simplicity. Signed-off-by: Yijing Wang --- drivers/pci/host-bridge.c | 63 ++++++++++++++++++++++++++++++++++++++++++ drivers/pci/pci.c | 67 --------------------------------------------- drivers/pci/pci.h | 13 --------- drivers/pci/probe.c | 11 ++----- include/linux/pci.h | 3 -- 5 files changed, 66 insertions(+), 91 deletions(-) diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c index 04c69c5..f193136 100644 --- a/drivers/pci/host-bridge.c +++ b/drivers/pci/host-bridge.c @@ -11,6 +11,8 @@ static LIST_HEAD(pci_host_bridge_list); static DEFINE_MUTEX(pci_host_mutex); +static void pci_host_assign_domain_nr(struct pci_host_bridge *host); + static void pci_release_host_bridge_dev(struct device *dev) { struct pci_host_bridge *bridge = to_pci_host_bridge(dev); @@ -159,8 +161,69 @@ int pci_domain_nr(struct pci_bus *bus) return host->domain; } EXPORT_SYMBOL(pci_domain_nr); + +static atomic_t __domain_nr = ATOMIC_INIT(-1); + +int pci_get_new_domain_nr(void) +{ + return atomic_inc_return(&__domain_nr); +} + +#ifdef CONFIG_PCI_DOMAINS_GENERIC +static int pci_assign_domain_nr(struct device *dev) +{ + static int use_dt_domains = -1; + int domain = of_get_pci_domain_nr(dev->of_node); + + /* + * Check DT domain and use_dt_domains values. + * + * If DT domain property is valid (domain >= 0) and + * use_dt_domains != 0, the DT assignment is valid since this means + * we have not previously allocated a domain number by using + * pci_get_new_domain_nr(); we should also update use_dt_domains to + * 1, to indicate that we have just assigned a domain number from + * DT. + * + * If DT domain property value is not valid (ie domain < 0), and we + * have not previously assigned a domain number from DT + * (use_dt_domains != 1) we should assign a domain number by + * using the: + * + * pci_get_new_domain_nr() + * + * API and update the use_dt_domains value to keep track of method we + * are using to assign domain numbers (use_dt_domains = 0). + * + * All other combinations imply we have a platform that is trying + * to mix domain numbers obtained from DT and pci_get_new_domain_nr(), + * which is a recipe for domain mishandling and it is prevented by + * invalidating the domain value (domain = -1) and printing a + * corresponding error. + */ + if (domain >= 0 && use_dt_domains) { + use_dt_domains = 1; + } else if (domain < 0 && use_dt_domains != 1) { + use_dt_domains = 0; + domain = pci_get_new_domain_nr(); + } else { + dev_err(dev, "Node %s has inconsistent \"linux,pci-domain\" property in DT\n", + dev->of_node->full_name); + domain = -1; + } + + return domain; +} +#endif #endif +static void pci_host_assign_domain_nr(struct pci_host_bridge *host) +{ +#ifdef CONFIG_PCI_DOMAINS_GENERIC + host->domain = pci_assign_domain_nr(host->dev.parent); +#endif +} + void pci_set_host_bridge_release(struct pci_host_bridge *bridge, void (*release_fn)(struct pci_host_bridge *), void *release_data) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 8a2f12c..044801c 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -4515,73 +4515,6 @@ static void pci_no_domains(void) #endif } -#ifdef CONFIG_PCI_DOMAINS -static atomic_t __domain_nr = ATOMIC_INIT(-1); - -int pci_get_new_domain_nr(void) -{ - return atomic_inc_return(&__domain_nr); -} - -#ifdef CONFIG_PCI_DOMAINS_GENERIC -static int pci_assign_domain_nr(struct device *dev) -{ - static int use_dt_domains = -1; - int domain = of_get_pci_domain_nr(dev->of_node); - - /* - * Check DT domain and use_dt_domains values. - * - * If DT domain property is valid (domain >= 0) and - * use_dt_domains != 0, the DT assignment is valid since this means - * we have not previously allocated a domain number by using - * pci_get_new_domain_nr(); we should also update use_dt_domains to - * 1, to indicate that we have just assigned a domain number from - * DT. - * - * If DT domain property value is not valid (ie domain < 0), and we - * have not previously assigned a domain number from DT - * (use_dt_domains != 1) we should assign a domain number by - * using the: - * - * pci_get_new_domain_nr() - * - * API and update the use_dt_domains value to keep track of method we - * are using to assign domain numbers (use_dt_domains = 0). - * - * All other combinations imply we have a platform that is trying - * to mix domain numbers obtained from DT and pci_get_new_domain_nr(), - * which is a recipe for domain mishandling and it is prevented by - * invalidating the domain value (domain = -1) and printing a - * corresponding error. - */ - if (domain >= 0 && use_dt_domains) { - use_dt_domains = 1; - } else if (domain < 0 && use_dt_domains != 1) { - use_dt_domains = 0; - domain = pci_get_new_domain_nr(); - } else { - dev_err(dev, "Node %s has inconsistent \"linux,pci-domain\" property in DT\n", - dev->of_node->full_name); - domain = -1; - } - - return domain; -} - -void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent) -{ - bus->domain_nr = pci_assign_domain_nr(parent); -} - -void pci_host_assign_domain_nr(struct pci_host_bridge *host) -{ - host->domain = pci_assign_domain_nr(host->dev.parent); -} - -#endif -#endif - /** * pci_ext_cfg_avail - can we access extended PCI config space? * diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index ef10cc1..a6e4d8f 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -321,19 +321,6 @@ static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe) } #endif -#ifdef CONFIG_PCI_DOMAINS_GENERIC -void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent); -void pci_host_assign_domain_nr(struct pci_host_bridge *host); -#else -static inline void pci_bus_assign_domain_nr(struct pci_bus *bus, - struct device *parent) -{ -} -static inline void pci_host_assign_domain_nr(struct pci_host_bridge *host) -{ -} -#endif - struct pci_host_bridge *pci_create_host_bridge( struct device *parent, int domain, int bus, void *sysdata, struct list_head *resources, struct pci_host_bridge_ops *ops); diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index cb0237f..53e4887 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -480,7 +480,7 @@ void pci_read_bridge_bases(struct pci_bus *child) } } -static struct pci_bus *pci_alloc_bus(struct pci_bus *parent) +static struct pci_bus *pci_alloc_bus(void) { struct pci_bus *b; @@ -495,10 +495,6 @@ static struct pci_bus *pci_alloc_bus(struct pci_bus *parent) INIT_LIST_HEAD(&b->resources); b->max_bus_speed = PCI_SPEED_UNKNOWN; b->cur_bus_speed = PCI_SPEED_UNKNOWN; -#ifdef CONFIG_PCI_DOMAINS_GENERIC - if (parent) - b->domain_nr = parent->domain_nr; -#endif return b; } @@ -645,7 +641,7 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent, /* * Allocate a new bus, and inherit stuff from the parent.. */ - child = pci_alloc_bus(parent); + child = pci_alloc_bus(); if (!child) return NULL; @@ -1865,7 +1861,7 @@ static struct pci_bus *pci_create_root_bus( char *fmt; parent = bridge->dev.parent; - b = pci_alloc_bus(NULL); + b = pci_alloc_bus(); if (!b) return NULL; @@ -1873,7 +1869,6 @@ static struct pci_bus *pci_create_root_bus( b->ops = ops; b->number = b->busn_res.start = pci_host_first_busnr(bridge); - pci_bus_assign_domain_nr(b, parent); bridge->bus = b; b->bridge = get_device(&bridge->dev); diff --git a/include/linux/pci.h b/include/linux/pci.h index c2c6675..7ef205c 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -469,9 +469,6 @@ struct pci_bus { unsigned char primary; /* number of primary bridge */ unsigned char max_bus_speed; /* enum pci_bus_speed */ unsigned char cur_bus_speed; /* enum pci_bus_speed */ -#ifdef CONFIG_PCI_DOMAINS_GENERIC - int domain_nr; -#endif char name[48]; -- 1.7.1