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[213.17.239.108]) by smtp.gmail.com with ESMTPSA id s194sm468002lfs.40.2016.05.10.08.20.05 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 10 May 2016 08:20:06 -0700 (PDT) From: Tomasz Nowicki To: helgaas@kernel.org, arnd@arndb.de, will.deacon@arm.com, catalin.marinas@arm.com, rafael@kernel.org, hanjun.guo@linaro.org, Lorenzo.Pieralisi@arm.com, okaya@codeaurora.org, jchandra@broadcom.com Cc: robert.richter@caviumnetworks.com, mw@semihalf.com, Liviu.Dudau@arm.com, ddaney@caviumnetworks.com, wangyijing@huawei.com, Suravee.Suthikulpanit@amd.com, msalter@redhat.com, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linaro-acpi@lists.linaro.org, jcm@redhat.com, andrea.gallo@linaro.org, dhdang@apm.com, jeremy.linton@arm.com, liudongdong3@huawei.com, cov@codeaurora.org, Tomasz Nowicki Subject: [PATCH V7 06/11] pci, acpi: Provide a way to assign bus domain number. Date: Tue, 10 May 2016 17:19:56 +0200 Message-Id: <1462893601-8937-7-git-send-email-tn@semihalf.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1462893601-8937-1-git-send-email-tn@semihalf.com> References: <1462893601-8937-1-git-send-email-tn@semihalf.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org This patch provides a way to set the ACPI domain number in PCI code. pci_create_root_bus is called with NULL as parent in ACPI. This ends up calling pci_bus_assign_domain_nr with a NULL parent. So we define acpi_pci_bus_domain_nr() which is meant to retrieve the PCI domain number based on 'struct pci_bus' in the ACPI way. pci_bus_assign_domain_nr() is updated to call acpi_pci_bus_domain_nr() and assign domain number on the root bus, in case of ACPI. acpi_pci_bus_domain_nr function is stub for now. While at it, for the sake of code clarity we put ACPI and DT domain assign methods into the corresponding helpers. Signed-off-by: Jayachandran C Signed-off-by: Tomasz Nowicki --- drivers/pci/pci.c | 11 +++++++++-- include/linux/pci-acpi.h | 5 +++++ 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index ff97a0b..a1d7bcf 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -4918,7 +4919,7 @@ int pci_get_new_domain_nr(void) } #ifdef CONFIG_PCI_DOMAINS_GENERIC -void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent) +static int of_pci_bus_domain_nr(struct device *parent) { static int use_dt_domains = -1; int domain = -1; @@ -4962,7 +4963,13 @@ void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent) domain = -1; } - bus->domain_nr = domain; + return domain; +} + +void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent) +{ + bus->domain_nr = acpi_disabled ? of_pci_bus_domain_nr(parent) : + acpi_pci_bus_domain_nr(bus); } #endif #endif diff --git a/include/linux/pci-acpi.h b/include/linux/pci-acpi.h index 89ab057..09f9f02 100644 --- a/include/linux/pci-acpi.h +++ b/include/linux/pci-acpi.h @@ -111,6 +111,11 @@ static inline void acpi_pci_add_bus(struct pci_bus *bus) { } static inline void acpi_pci_remove_bus(struct pci_bus *bus) { } #endif /* CONFIG_ACPI */ +static inline int acpi_pci_bus_domain_nr(struct pci_bus *bus) +{ + return 0; +} + #ifdef CONFIG_ACPI_APEI extern bool aer_acpi_firmware_first(void); #else