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authorJiang Liu <jiang.liu@linux.intel.com>2014-11-15 22:24:04 +0800
committerThomas Gleixner <tglx@linutronix.de>2014-11-23 13:01:47 +0100
commitd9109698be6e7439e6082aa00d79d4556114739b (patch)
tree58b79edd974b2b6d57bd927375946eed9109c333 /include/linux/msi.h
parent926ff9ad76e097011030feaee904395e06eea17a (diff)
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genirq: Introduce msi_domain_alloc/free_irqs()
Introduce msi_domain_{alloc|free}_irqs() to alloc/free interrupts from generic MSI irqdomain. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Tony Luck <tony.luck@intel.com> Cc: linux-arm-kernel@lists.infradead.org Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Grant Likely <grant.likely@linaro.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Yijing Wang <wangyijing@huawei.com> Cc: Yingjoe Chen <yingjoe.chen@mediatek.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Alexander Gordeev <agordeev@redhat.com> Link: http://lkml.kernel.org/r/1416061447-9472-7-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/msi.h')
-rw-r--r--include/linux/msi.h29
1 files changed, 29 insertions, 0 deletions
diff --git a/include/linux/msi.h b/include/linux/msi.h
index b5ca2456769c..7a93a988dce8 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -115,6 +115,9 @@ struct msi_controller {
};
#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
+
+#include <asm/msi.h>
+
struct irq_domain;
struct irq_chip;
struct device_node;
@@ -125,6 +128,18 @@ struct msi_domain_info;
* @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
+ * @msi_check: Callback for verification of the domain/info/dev data
+ * @msi_prepare: Prepare the allocation of the interrupts in the domain
+ * @msi_finish: Optional callbacl to finalize the allocation
+ * @set_desc: Set the msi descriptor for an interrupt
+ * @handle_error: Optional error handler if the allocation fails
+ *
+ * @get_hwirq, @msi_init and @msi_free are callbacks used by
+ * msi_create_irq_domain() and related interfaces
+ *
+ * @msi_check, @msi_prepare, @msi_finish, @set_desc and @handle_error
+ * are callbacks used by msi_irq_domain_alloc_irqs() and related
+ * interfaces which are based on msi_desc.
*/
struct msi_domain_ops {
irq_hw_number_t (*get_hwirq)(struct msi_domain_info *info, void *arg);
@@ -135,6 +150,17 @@ struct msi_domain_ops {
void (*msi_free)(struct irq_domain *domain,
struct msi_domain_info *info,
unsigned int virq);
+ int (*msi_check)(struct irq_domain *domain,
+ struct msi_domain_info *info,
+ struct device *dev);
+ int (*msi_prepare)(struct irq_domain *domain,
+ struct device *dev, int nvec,
+ msi_alloc_info_t *arg);
+ void (*msi_finish)(msi_alloc_info_t *arg, int retval);
+ void (*set_desc)(msi_alloc_info_t *arg,
+ struct msi_desc *desc);
+ int (*handle_error)(struct irq_domain *domain,
+ struct msi_desc *desc, int error);
};
/**
@@ -155,6 +181,9 @@ int msi_domain_set_affinity(struct irq_data *data, const struct cpumask *mask,
struct irq_domain *msi_create_irq_domain(struct device_node *of_node,
struct msi_domain_info *info,
struct irq_domain *parent);
+int msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev,
+ int nvec);
+void msi_domain_free_irqs(struct irq_domain *domain, struct device *dev);
struct msi_domain_info *msi_get_domain_info(struct irq_domain *domain);
#endif /* CONFIG_GENERIC_MSI_IRQ_DOMAIN */