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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 /drivers/base
parent0c4cb97d4ec9d98fc5e30317326f28ed206f3ac6 (diff)
downloadlinux-1f83515bebc236d2acda59976a8e852f1a6d50b7.tar.bz2
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/base')
-rw-r--r--drivers/base/platform-msi.c14
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;