diff options
| author | Marc Zyngier | 2018-10-01 16:13:45 +0200 |
|---|---|---|
| committer | Marc Zyngier | 2018-10-02 12:16:38 +0200 |
| commit | 1f83515bebc236d2acda59976a8e852f1a6d50b7 (patch) | |
| tree | ddd66f60a07b885f543ef18e54f6b143c46c7b79 /include/linux/msi.h | |
| parent | dt-bindings: irqchip: renesas-irqc: Document r8a7744 support (diff) | |
| download | kernel-qcow2-linux-1f83515bebc236d2acda59976a8e852f1a6d50b7.tar.gz kernel-qcow2-linux-1f83515bebc236d2acda59976a8e852f1a6d50b7.tar.xz kernel-qcow2-linux-1f83515bebc236d2acda59976a8e852f1a6d50b7.zip | |
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.h | 17 |
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, |