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authorMarc Zyngier <marc.zyngier@arm.com>2018-10-01 16:13:45 +0200
committerMarc Zyngier <marc.zyngier@arm.com>2018-10-02 11:16:38 +0100
commit1f83515bebc236d2acda59976a8e852f1a6d50b7 (patch)
treeddd66f60a07b885f543ef18e54f6b143c46c7b79 /include/linux/msi.h
parent0c4cb97d4ec9d98fc5e30317326f28ed206f3ac6 (diff)
genirq/msi: Allow creation of a tree-based irqdomain for platform-msi
platform_msi_create_device_domain() always creates a revmap-based irqdomain, which has the drawback of requiring the number of MSIs that can be allocated ahead of time. This is not always possible, and we sometimes need to use a tree-based irqdomain instead. Add a new platform_msi_create_device_tree_domain() helper to that effect. Reported-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'include/linux/msi.h')
-rw-r--r--include/linux/msi.h17
1 files changed, 12 insertions, 5 deletions
diff --git a/include/linux/msi.h b/include/linux/msi.h
index 5839d8062dfc..0e9c50052ff3 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -317,11 +317,18 @@ int msi_domain_prepare_irqs(struct irq_domain *domain, struct device *dev,
int msi_domain_populate_irqs(struct irq_domain *domain, struct device *dev,
int virq, int nvec, msi_alloc_info_t *args);
struct irq_domain *
-platform_msi_create_device_domain(struct device *dev,
- unsigned int nvec,
- irq_write_msi_msg_t write_msi_msg,
- const struct irq_domain_ops *ops,
- void *host_data);
+__platform_msi_create_device_domain(struct device *dev,
+ unsigned int nvec,
+ bool is_tree,
+ irq_write_msi_msg_t write_msi_msg,
+ const struct irq_domain_ops *ops,
+ void *host_data);
+
+#define platform_msi_create_device_domain(dev, nvec, write, ops, data) \
+ __platform_msi_create_device_domain(dev, nvec, false, write, ops, data)
+#define platform_msi_create_device_tree_domain(dev, nvec, write, ops, data) \
+ __platform_msi_create_device_domain(dev, nvec, true, write, ops, data)
+
int platform_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
unsigned int nr_irqs);
void platform_msi_domain_free(struct irq_domain *domain, unsigned int virq,