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authorJiang Liu <jiang.liu@linux.intel.com>2014-11-12 13:39:03 +0300
committerThomas Gleixner <tglx@linutronix.de>2014-11-23 15:01:47 +0300
commitf3cf8bb0d6c3c11ddedf01f02f856f2ae8c33aa4 (patch)
treef61cecf6747f73d028a5f5e87f25a5cede929c39 /include/linux/msi.h
parent9dde55b72dc80bfae4280ddce5dbd69ba8240813 (diff)
downloadlinux-f3cf8bb0d6c3c11ddedf01f02f856f2ae8c33aa4.tar.xz
genirq: Add generic msi irq domain support
Implement the basic functions for MSI interrupt support with hierarchical interrupt domains. [ tglx: Extracted and combined from several patches ] Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Grant Likely <grant.likely@linaro.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Yingjoe Chen <yingjoe.chen@mediatek.com> Cc: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/msi.h')
-rw-r--r--include/linux/msi.h45
1 files changed, 45 insertions, 0 deletions
diff --git a/include/linux/msi.h b/include/linux/msi.h
index e0d08517bd3d..b5ca2456769c 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -114,4 +114,49 @@ struct msi_controller {
void (*teardown_irq)(struct msi_controller *chip, unsigned int irq);
};
+#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
+struct irq_domain;
+struct irq_chip;
+struct device_node;
+struct msi_domain_info;
+
+/**
+ * struct msi_domain_ops - MSI interrupt domain callbacks
+ * @get_hwirq: Retrieve the resulting hw irq number
+ * @msi_init: Domain specific init function for MSI interrupts
+ * @msi_free: Domain specific function to free a MSI interrupts
+ */
+struct msi_domain_ops {
+ irq_hw_number_t (*get_hwirq)(struct msi_domain_info *info, void *arg);
+ int (*msi_init)(struct irq_domain *domain,
+ struct msi_domain_info *info,
+ unsigned int virq, irq_hw_number_t hwirq,
+ void *arg);
+ void (*msi_free)(struct irq_domain *domain,
+ struct msi_domain_info *info,
+ unsigned int virq);
+};
+
+/**
+ * struct msi_domain_info - MSI interrupt domain data
+ * @ops: The callback data structure
+ * @chip: The associated interrupt chip
+ * @data: Domain specific data
+ */
+struct msi_domain_info {
+ struct msi_domain_ops *ops;
+ struct irq_chip *chip;
+ void *data;
+};
+
+int msi_domain_set_affinity(struct irq_data *data, const struct cpumask *mask,
+ bool force);
+
+struct irq_domain *msi_create_irq_domain(struct device_node *of_node,
+ struct msi_domain_info *info,
+ struct irq_domain *parent);
+struct msi_domain_info *msi_get_domain_info(struct irq_domain *domain);
+
+#endif /* CONFIG_GENERIC_MSI_IRQ_DOMAIN */
+
#endif /* LINUX_MSI_H */