diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/msi.h | 49 |
1 files changed, 34 insertions, 15 deletions
diff --git a/include/linux/msi.h b/include/linux/msi.h index 43b8866c8431..a4339ebcc035 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -24,6 +24,8 @@ #include <linux/xarray.h> #include <linux/mutex.h> #include <linux/list.h> +#include <linux/bits.h> + #include <asm/msi.h> /* Dummy shadow structures if an architecture does not define them */ @@ -440,7 +442,16 @@ struct msi_domain_info { void *data; }; -/* Flags for msi_domain_info */ +/* + * Flags for msi_domain_info + * + * Bit 0-15: Generic MSI functionality which is not subject to restriction + * by parent domains + * + * Bit 16-31: Functionality which depends on the underlying parent domain and + * can be masked out by msi_parent_ops::init_dev_msi_info() when + * a device MSI domain is initialized. + */ enum { /* * Init non implemented ops callbacks with default MSI domain @@ -452,33 +463,41 @@ enum { * callbacks. */ MSI_FLAG_USE_DEF_CHIP_OPS = (1 << 1), - /* Support multiple PCI MSI interrupts */ - MSI_FLAG_MULTI_PCI_MSI = (1 << 2), - /* Support PCI MSIX interrupts */ - MSI_FLAG_PCI_MSIX = (1 << 3), /* Needs early activate, required for PCI */ - MSI_FLAG_ACTIVATE_EARLY = (1 << 4), + MSI_FLAG_ACTIVATE_EARLY = (1 << 2), /* * Must reactivate when irq is started even when * MSI_FLAG_ACTIVATE_EARLY has been set. */ - MSI_FLAG_MUST_REACTIVATE = (1 << 5), - /* Is level-triggered capable, using two messages */ - MSI_FLAG_LEVEL_CAPABLE = (1 << 6), + MSI_FLAG_MUST_REACTIVATE = (1 << 3), /* Populate sysfs on alloc() and destroy it on free() */ - MSI_FLAG_DEV_SYSFS = (1 << 7), - /* MSI-X entries must be contiguous */ - MSI_FLAG_MSIX_CONTIGUOUS = (1 << 8), + MSI_FLAG_DEV_SYSFS = (1 << 4), /* Allocate simple MSI descriptors */ - MSI_FLAG_ALLOC_SIMPLE_MSI_DESCS = (1 << 9), + MSI_FLAG_ALLOC_SIMPLE_MSI_DESCS = (1 << 5), /* Free MSI descriptors */ - MSI_FLAG_FREE_MSI_DESCS = (1 << 10), + MSI_FLAG_FREE_MSI_DESCS = (1 << 6), /* * Quirk to handle MSI implementations which do not provide * masking. Currently known to affect x86, but has to be partially * handled in the core MSI code. */ - MSI_FLAG_NOMASK_QUIRK = (1 << 11), + MSI_FLAG_NOMASK_QUIRK = (1 << 7), + + /* Mask for the generic functionality */ + MSI_GENERIC_FLAGS_MASK = GENMASK(15, 0), + + /* Mask for the domain specific functionality */ + MSI_DOMAIN_FLAGS_MASK = GENMASK(31, 16), + + /* Support multiple PCI MSI interrupts */ + MSI_FLAG_MULTI_PCI_MSI = (1 << 16), + /* Support PCI MSIX interrupts */ + MSI_FLAG_PCI_MSIX = (1 << 17), + /* Is level-triggered capable, using two messages */ + MSI_FLAG_LEVEL_CAPABLE = (1 << 18), + /* MSI-X entries must be contiguous */ + MSI_FLAG_MSIX_CONTIGUOUS = (1 << 19), + }; int msi_domain_set_affinity(struct irq_data *data, const struct cpumask *mask, |