diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/msi.h | 48 |
1 files changed, 42 insertions, 6 deletions
diff --git a/include/linux/msi.h b/include/linux/msi.h index fdbc80d81e26..764a4e8828fb 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -206,11 +206,48 @@ int msi_setup_device_data(struct device *dev); void msi_lock_descs(struct device *dev); void msi_unlock_descs(struct device *dev); -struct msi_desc *msi_first_desc(struct device *dev, enum msi_desc_filter filter); -struct msi_desc *msi_next_desc(struct device *dev, enum msi_desc_filter filter); +struct msi_desc *msi_domain_first_desc(struct device *dev, unsigned int domid, + enum msi_desc_filter filter); /** - * msi_for_each_desc - Iterate the MSI descriptors + * msi_first_desc - Get the first MSI descriptor of the default irqdomain + * @dev: Device to operate on + * @filter: Descriptor state filter + * + * Must be called with the MSI descriptor mutex held, i.e. msi_lock_descs() + * must be invoked before the call. + * + * Return: Pointer to the first MSI descriptor matching the search + * criteria, NULL if none found. + */ +static inline struct msi_desc *msi_first_desc(struct device *dev, + enum msi_desc_filter filter) +{ + return msi_domain_first_desc(dev, MSI_DEFAULT_DOMAIN, filter); +} + +struct msi_desc *msi_next_desc(struct device *dev, unsigned int domid, + enum msi_desc_filter filter); + +/** + * msi_domain_for_each_desc - Iterate the MSI descriptors in a specific domain + * + * @desc: struct msi_desc pointer used as iterator + * @dev: struct device pointer - device to iterate + * @domid: The id of the interrupt domain which should be walked. + * @filter: Filter for descriptor selection + * + * Notes: + * - The loop must be protected with a msi_lock_descs()/msi_unlock_descs() + * pair. + * - It is safe to remove a retrieved MSI descriptor in the loop. + */ +#define msi_domain_for_each_desc(desc, dev, domid, filter) \ + for ((desc) = msi_domain_first_desc((dev), (domid), (filter)); (desc); \ + (desc) = msi_next_desc((dev), (domid), (filter))) + +/** + * msi_for_each_desc - Iterate the MSI descriptors in the default irqdomain * * @desc: struct msi_desc pointer used as iterator * @dev: struct device pointer - device to iterate @@ -221,9 +258,8 @@ struct msi_desc *msi_next_desc(struct device *dev, enum msi_desc_filter filter); * pair. * - It is safe to remove a retrieved MSI descriptor in the loop. */ -#define msi_for_each_desc(desc, dev, filter) \ - for ((desc) = msi_first_desc((dev), (filter)); (desc); \ - (desc) = msi_next_desc((dev), (filter))) +#define msi_for_each_desc(desc, dev, filter) \ + msi_domain_for_each_desc((desc), (dev), MSI_DEFAULT_DOMAIN, (filter)) #define msi_desc_to_dev(desc) ((desc)->dev) |