diff options
Diffstat (limited to 'include/linux/msi.h')
| -rw-r--r-- | include/linux/msi.h | 69 |
1 files changed, 50 insertions, 19 deletions
diff --git a/include/linux/msi.h b/include/linux/msi.h index b10093c4d00e..86e42742fd0f 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -73,7 +73,6 @@ struct msi_msg { }; }; -extern int pci_msi_ignore_mask; /* Helper functions */ struct msi_desc; struct pci_dev; @@ -166,6 +165,10 @@ struct msi_desc_data { * @dev: Pointer to the device which uses this descriptor * @msg: The last set MSI message cached for reuse * @affinity: Optional pointer to a cpu affinity mask for this descriptor + * @iommu_msi_iova: Optional shifted IOVA from the IOMMU to override the msi_addr. + * Only used if iommu_msi_shift != 0 + * @iommu_msi_shift: Indicates how many bits of the original address should be + * preserved when using iommu_msi_iova. * @sysfs_attr: Pointer to sysfs device attribute * * @write_msi_msg: Callback that may be called when the MSI message @@ -184,7 +187,8 @@ struct msi_desc { struct msi_msg msg; struct irq_affinity_desc *affinity; #ifdef CONFIG_IRQ_MSI_IOMMU - const void *iommu_cookie; + u64 iommu_msi_iova : 58; + u64 iommu_msi_shift : 6; #endif #ifdef CONFIG_SYSFS struct device_attribute *sysfs_attrs; @@ -285,28 +289,42 @@ struct msi_desc *msi_next_desc(struct device *dev, unsigned int domid, #define msi_desc_to_dev(desc) ((desc)->dev) -#ifdef CONFIG_IRQ_MSI_IOMMU -static inline const void *msi_desc_get_iommu_cookie(struct msi_desc *desc) -{ - return desc->iommu_cookie; -} - -static inline void msi_desc_set_iommu_cookie(struct msi_desc *desc, - const void *iommu_cookie) -{ - desc->iommu_cookie = iommu_cookie; -} -#else -static inline const void *msi_desc_get_iommu_cookie(struct msi_desc *desc) +static inline void msi_desc_set_iommu_msi_iova(struct msi_desc *desc, u64 msi_iova, + unsigned int msi_shift) { - return NULL; +#ifdef CONFIG_IRQ_MSI_IOMMU + desc->iommu_msi_iova = msi_iova >> msi_shift; + desc->iommu_msi_shift = msi_shift; +#endif } -static inline void msi_desc_set_iommu_cookie(struct msi_desc *desc, - const void *iommu_cookie) +/** + * msi_msg_set_addr() - Set MSI address in an MSI message + * + * @desc: MSI descriptor that may carry an IOVA base address for MSI via @iommu_msi_iova/shift + * @msg: Target MSI message to set its address_hi and address_lo + * @msi_addr: Physical address to set the MSI message + * + * Notes: + * - Override @msi_addr using the IOVA base address in the @desc if @iommu_msi_shift is set + * - Otherwise, simply set @msi_addr to @msg + */ +static inline void msi_msg_set_addr(struct msi_desc *desc, struct msi_msg *msg, + phys_addr_t msi_addr) { -} +#ifdef CONFIG_IRQ_MSI_IOMMU + if (desc->iommu_msi_shift) { + u64 msi_iova = desc->iommu_msi_iova << desc->iommu_msi_shift; + + msg->address_hi = upper_32_bits(msi_iova); + msg->address_lo = lower_32_bits(msi_iova) | + (msi_addr & ((1 << desc->iommu_msi_shift) - 1)); + return; + } #endif + msg->address_hi = upper_32_bits(msi_addr); + msg->address_lo = lower_32_bits(msi_addr); +} int msi_domain_insert_msi_desc(struct device *dev, unsigned int domid, struct msi_desc *init_desc); @@ -556,6 +574,16 @@ enum { MSI_FLAG_PCI_MSIX_ALLOC_DYN = (1 << 20), /* PCI MSIs cannot be steered separately to CPU cores */ MSI_FLAG_NO_AFFINITY = (1 << 21), + /* Inhibit usage of entry masking */ + MSI_FLAG_NO_MASK = (1 << 22), +}; + +/* + * Flags for msi_parent_ops::chip_flags + */ +enum { + MSI_CHIP_FLAG_SET_EOI = (1 << 0), + MSI_CHIP_FLAG_SET_ACK = (1 << 1), }; /** @@ -563,6 +591,8 @@ enum { * * @supported_flags: Required: The supported MSI flags of the parent domain * @required_flags: Optional: The required MSI flags of the parent MSI domain + * @chip_flags: Optional: Select MSI chip callbacks to update with defaults + * in msi_lib_init_dev_msi_info(). * @bus_select_token: Optional: The bus token of the real parent domain for * irq_domain::select() * @bus_select_mask: Optional: A mask of supported BUS_DOMAINs for @@ -575,6 +605,7 @@ enum { struct msi_parent_ops { u32 supported_flags; u32 required_flags; + u32 chip_flags; u32 bus_select_token; u32 bus_select_mask; const char *prefix; |