diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2022-11-25 02:24:35 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2022-12-05 21:21:00 +0300 |
| commit | f2480e7dacdcd9aab25641346ae53b7ff03777fc (patch) | |
| tree | 921bf1fd59b8eb921a57784943b7202ba0d0e123 /include | |
| parent | 4cd5f4403f283766f73749c4c936801f58ffe77a (diff) | |
| download | linux-f2480e7dacdcd9aab25641346ae53b7ff03777fc.tar.xz | |
genirq/msi: Provide new domain id allocation functions
Provide two sorts of interfaces to handle the different use cases:
- msi_domain_alloc_irqs_range():
Handles a caller defined precise range
- msi_domain_alloc_irqs_all():
Allocates all interrupts associated to a domain by scanning the
allocated MSI descriptors
The latter is useful for the existing PCI/MSI support which does not have
range information available.
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/20221124230314.396497163@linutronix.de
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/msi.h | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/include/linux/msi.h b/include/linux/msi.h index 74cb0a93de6f..611707d619fc 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -383,8 +383,8 @@ struct msi_domain_info; * @get_hwirq, @msi_init and @msi_free are callbacks used by the underlying * irqdomain. * - * @msi_check, @msi_prepare and @set_desc are callbacks used by - * msi_domain_alloc/free_irqs(). + * @msi_check, @msi_prepare and @set_desc are callbacks used by the + * msi_domain_alloc/free_irqs*() variants. * * @domain_alloc_irqs, @domain_free_irqs can be used to override the * default allocation/free functions (__msi_domain_alloc/free_irqs). This @@ -392,11 +392,6 @@ struct msi_domain_info; * be wrapped into the regular irq domains concepts by mere mortals. This * allows to universally use msi_domain_alloc/free_irqs without having to * special case XEN all over the place. - * - * Contrary to other operations @domain_alloc_irqs and @domain_free_irqs - * are set to the default implementation if NULL and even when - * MSI_FLAG_USE_DEF_DOM_OPS is not set to avoid breaking existing users and - * because these callbacks are obviously mandatory. */ struct msi_domain_ops { irq_hw_number_t (*get_hwirq)(struct msi_domain_info *info, @@ -496,14 +491,21 @@ int msi_domain_alloc_irqs_descs_locked(struct irq_domain *domain, struct device int nvec); int msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev, int nvec); + void msi_domain_free_irqs_descs_locked(struct irq_domain *domain, struct device *dev); void msi_domain_free_irqs(struct irq_domain *domain, struct device *dev); +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, + unsigned int first, unsigned int last); +int msi_domain_alloc_irqs_all_locked(struct device *dev, unsigned int domid, int nirqs); + + void msi_domain_free_irqs_range_locked(struct device *dev, unsigned int domid, unsigned int first, unsigned int last); void msi_domain_free_irqs_range(struct device *dev, unsigned int domid, unsigned int first, unsigned int last); - void msi_domain_free_irqs_all_locked(struct device *dev, unsigned int domid); void msi_domain_free_irqs_all(struct device *dev, unsigned int domid); |