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| author | Marc Zyngier <marc.zyngier@arm.com> | 2018-10-01 17:13:45 +0300 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2018-10-02 13:16:38 +0300 |
| commit | 1f83515bebc236d2acda59976a8e852f1a6d50b7 (patch) | |
| tree | ddd66f60a07b885f543ef18e54f6b143c46c7b79 /drivers | |
| parent | 0c4cb97d4ec9d98fc5e30317326f28ed206f3ac6 (diff) | |
| download | linux-1f83515bebc236d2acda59976a8e852f1a6d50b7.tar.xz | |
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 'drivers')
| -rw-r--r-- | drivers/base/platform-msi.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/base/platform-msi.c b/drivers/base/platform-msi.c index 60d6cc618f1c..f39a920496fb 100644 --- a/drivers/base/platform-msi.c +++ b/drivers/base/platform-msi.c @@ -321,11 +321,12 @@ void *platform_msi_get_host_data(struct irq_domain *domain) * Returns an irqdomain for @nvec interrupts */ 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) { struct platform_msi_priv_data *data; struct irq_domain *domain; @@ -336,7 +337,8 @@ platform_msi_create_device_domain(struct device *dev, return NULL; data->host_data = host_data; - domain = irq_domain_create_hierarchy(dev->msi_domain, 0, nvec, + domain = irq_domain_create_hierarchy(dev->msi_domain, 0, + is_tree ? 0 : nvec, dev->fwnode, ops, data); if (!domain) goto free_priv; |