diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2022-11-25 00:25:56 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2022-12-05 19:21:01 +0100 |
| commit | 27a6dea3ebaab3d6f8ded969ec3af710bcbe0c02 (patch) | |
| tree | 0266ecea7b918bfb77dd0a4087ef0ecfe4d6f7b5 /include/linux/msi.h | |
| parent | 4443664f298d1a2cba25a2e48d53b78f4138209b (diff) | |
genirq/msi: Provide msi_create/free_device_irq_domain()
Now that all prerequsites are in place, provide the actual interfaces for
creating and removing per device interrupt domains.
MSI device interrupt domains are created from the provided
msi_domain_template which is duplicated so that it can be modified for the
particular device.
The name of the domain and the name of the interrupt chip are composed by
"$(PREFIX)$(CHIPNAME)-$(DEVNAME)"
$PREFIX: The optional prefix provided by the underlying MSI parent domain
via msi_parent_ops::prefix.
$CHIPNAME: The name of the irq_chip in the template
$DEVNAME: The name of the device
The domain is further initialized through a MSI parent domain callback which
fills in the required functionality for the parent domain or domains further
down the hierarchy. This initialization can fail, e.g. when the requested
feature or MSI domain type cannot be supported.
The domain pointer is stored in the pointer array inside of msi_device_data
which is attached to the domain.
The domain can be removed via the API or left for disposal via devres when
the device is torn down. The API removal is useful e.g. for PCI to have
seperate domains for MSI and MSI-X, which are mutually exclusive and always
occupy the default domain id slot.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221124232325.678838546@linutronix.de
Diffstat (limited to 'include/linux/msi.h')
| -rw-r--r-- | include/linux/msi.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/msi.h b/include/linux/msi.h index 08a0e2abf048..ef46a3ee18e4 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -547,6 +547,12 @@ struct irq_domain *msi_create_irq_domain(struct fwnode_handle *fwnode, struct msi_domain_info *info, struct irq_domain *parent); +bool msi_create_device_irq_domain(struct device *dev, unsigned int domid, + const struct msi_domain_template *template, + unsigned int hwsize, void *domain_data, + void *chip_data); +void msi_remove_device_irq_domain(struct device *dev, unsigned int domid); + int msi_domain_alloc_irqs_range_locked(struct device *dev, unsigned int domid, unsigned int first, unsigned int last); int msi_domain_alloc_irqs_range(struct device *dev, unsigned int domid, |