On 07/23/2015 05:26 PM, Marc Zyngier wrote:
It is not uncommon (at least with the ARM stuff) to have a piece of hardware that implements different flavours of "interrupts". A typical example of this is the GICv3 ITS, which implements standard PCI/MSI support, but also some form of "generic MSI".So far, the PCI/MSI domain is registered using the ITS device_node, so that irq_find_host can return it. On the contrary, the raw MSI domain is not registered with an device_node, making it impossible to be looked up by another subsystem (obviously, using the same device_node twice would only result in confusion, as it is not defined which one irq_find_host would return). A solution to this is to "type" domains that may be aliasing, and to be able to lookup an device_node that matches a given type. For this, we introduce irq_find_matching_host() as a superset of irq_find_host: struct irq_domain *irq_find_matching_host(struct device_node *node, enum irq_domain_bus_token bus_token); where bus_token is the "type" we want to match the domain against (so far, only DOMAIN_BUS_ANY is defined). This result in some moderately invasive changes on the PPC side (which is the only user of the .match method). This has otherwise no functionnal change. Signed-off-by: Marc Zyngier <marc.zyng...@arm.com> --- arch/powerpc/platforms/512x/mpc5121_ads_cpld.c | 3 ++- arch/powerpc/platforms/cell/interrupt.c | 3 ++- arch/powerpc/platforms/embedded6xx/flipper-pic.c | 3 ++- arch/powerpc/platforms/powermac/pic.c | 3 ++- arch/powerpc/platforms/powernv/opal-irqchip.c | 3 ++- arch/powerpc/platforms/ps3/interrupt.c | 3 ++- arch/powerpc/sysdev/ehv_pic.c | 3 ++- arch/powerpc/sysdev/i8259.c | 3 ++- arch/powerpc/sysdev/ipic.c | 3 ++- arch/powerpc/sysdev/mpic.c | 3 ++- arch/powerpc/sysdev/qe_lib/qe_ic.c | 3 ++- arch/powerpc/sysdev/xics/xics-common.c | 3 ++- include/linux/irqdomain.h | 23 +++++++++++++++++++++-- kernel/irq/irqdomain.c | 18 +++++++++++++----- 14 files changed, 58 insertions(+), 19 deletions(-)
[...]
/** * irq_domain_add_linear() - Allocate and register a linear revmap irq_domain. * @of_node: pointer to interrupt controller's device tree node. diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index 8c3577f..995d217 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -187,10 +187,12 @@ struct irq_domain *irq_domain_add_legacy(struct device_node *of_node, EXPORT_SYMBOL_GPL(irq_domain_add_legacy); /** - * irq_find_host() - Locates a domain for a given device node + * irq_find_matching_host() - Locates a domain for a given device node * @node: device-tree node of the interrupt controller + * @data: domain-specific data
Typo, @bus_token.
*/ -struct irq_domain *irq_find_host(struct device_node *node) +struct irq_domain *irq_find_matching_host(struct device_node *node, + enum irq_domain_bus_token bus_token)
Other than that, Reviewed-by: Hanjun Guo <hanjun....@linaro.org> Thanks Hanjun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
