On 08/04/2015 10:04 PM, Marc Zyngier wrote:
On 29/07/15 11:08, Hanjun Guo wrote:From: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx> This patch introduces pci_host_bridge_acpi_msi_domain(), which queries a GIC MSI irq-domain token and use it to retrieve an irq_domain with DOMAIN_BUS_PCI_MSI bus type, and bind it to PCI host-bridge. Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx> Signed-off-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx> --- drivers/pci/pci-acpi.c | 18 ++++++++++++++++++ drivers/pci/probe.c | 3 +++ include/linux/pci-acpi.h | 4 ++++ 3 files changed, 25 insertions(+) diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index 314a625..5f11653 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -9,6 +9,7 @@ #include <linux/delay.h> #include <linux/init.h> +#include <linux/irqdomain.h> #include <linux/pci.h> #include <linux/pci_hotplug.h> #include <linux/module.h> @@ -16,6 +17,7 @@ #include <linux/pci-acpi.h> #include <linux/pm_runtime.h> #include <linux/pm_qos.h> +#include <acpi/acpi_gic.h> #include "pci.h" /* @@ -681,6 +683,22 @@ static bool pci_acpi_bus_match(struct device *dev) return dev_is_pci(dev); } +#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN +struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) +{ + struct irq_domain *d = NULL; + void *token = acpi_gic_get_msi_token(&bus->dev);Do you see why I positively *hate* having hardware details in generic layers? They propagate everywhere...+ + if (token) + d = irq_find_matching_host(token, DOMAIN_BUS_PCI_MSI); + + if (!d) + pr_debug("Fail to find domain for MSI\n"); + + return d; +} +#endif /*CONFIG_GENERIC_MSI_IRQ_DOMAIN*/ + static struct acpi_bus_type acpi_pci_bus = { .name = "PCI", .match = pci_acpi_bus_match, diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index a7afeac..8c1204c 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -12,6 +12,7 @@ #include <linux/module.h> #include <linux/cpumask.h> #include <linux/pci-aspm.h> +#include <linux/pci-acpi.h> #include <asm-generic/pci-bridge.h> #include "pci.h" @@ -670,6 +671,8 @@ static struct irq_domain *pci_host_bridge_msi_domain(struct pci_bus *bus) * should be called from here. */ d = pci_host_bridge_of_msi_domain(bus); + if (!d) + d = pci_host_bridge_acpi_msi_domain(bus); return d; } diff --git a/include/linux/pci-acpi.h b/include/linux/pci-acpi.h index a965efa..766d045 100644 --- a/include/linux/pci-acpi.h +++ b/include/linux/pci-acpi.h @@ -77,6 +77,8 @@ static inline void acpiphp_remove_slots(struct pci_bus *bus) { } static inline void acpiphp_check_host_bridge(struct acpi_device *adev) { } #endif +struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus); + extern const u8 pci_acpi_dsm_uuid[]; #define DEVICE_LABEL_DSM 0x07 #define RESET_DELAY_DSM 0x08 @@ -85,6 +87,8 @@ extern const u8 pci_acpi_dsm_uuid[]; #else /* CONFIG_ACPI */ static inline void acpi_pci_add_bus(struct pci_bus *bus) { } static inline void acpi_pci_remove_bus(struct pci_bus *bus) { } +static inline struct irq_domain * +pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) { return NULL; } #endif /* CONFIG_ACPI */ #ifdef CONFIG_ACPI_APEIOnce you solve the HW abstraction issue, this will be OK.
Sure, I will sync with Suravee to fix that. Thanks for you comments! Hanjun -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
