From: Thomas Gleixner Date: Thu, 24 Nov 2022 23:26:28 +0000 (+0100) Subject: genirq/msi: Provide constants for PCI/IMS support X-Git-Tag: v6.6.17~6028^2~10 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e23d4192bf9b612bce5b24f22719fd3cc6edaa69;p=platform%2Fkernel%2Flinux-rpi.git genirq/msi: Provide constants for PCI/IMS support Provide the necessary constants for PCI/IMS support: - A new bus token for MSI irqdomain identification - A MSI feature flag for the MSI irqdomains to signal support - A secondary domain id The latter expands the device internal domain pointer storage array from 1 to 2 entries. That extra pointer is mostly unused today, but the alternative solutions would not be free either and would introduce more complexity all over the place. Trade the 8bytes for simplicity. Signed-off-by: Thomas Gleixner Reviewed-by: Kevin Tian Acked-by: Marc Zyngier Link: https://lore.kernel.org/r/20221124232326.846169830@linutronix.de --- diff --git a/include/linux/irqdomain_defs.h b/include/linux/irqdomain_defs.h index 0b2d8a8..c29921f 100644 --- a/include/linux/irqdomain_defs.h +++ b/include/linux/irqdomain_defs.h @@ -25,6 +25,7 @@ enum irq_domain_bus_token { DOMAIN_BUS_PCI_DEVICE_MSIX, DOMAIN_BUS_DMAR, DOMAIN_BUS_AMDVI, + DOMAIN_BUS_PCI_DEVICE_IMS, }; #endif /* _LINUX_IRQDOMAIN_DEFS_H */ diff --git a/include/linux/msi.h b/include/linux/msi.h index 3cb1586..a112b91 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -559,6 +559,8 @@ enum { MSI_FLAG_MSIX_CONTIGUOUS = (1 << 19), /* PCI/MSI-X vectors can be dynamically allocated/freed post MSI-X enable */ MSI_FLAG_PCI_MSIX_ALLOC_DYN = (1 << 20), + /* Support for PCI/IMS */ + MSI_FLAG_PCI_IMS = (1 << 21), }; /** diff --git a/include/linux/msi_api.h b/include/linux/msi_api.h index 5ae72d1..391087a 100644 --- a/include/linux/msi_api.h +++ b/include/linux/msi_api.h @@ -15,6 +15,7 @@ struct device; */ enum msi_domain_ids { MSI_DEFAULT_DOMAIN, + MSI_SECONDARY_DOMAIN, MSI_MAX_DEVICE_IRQDOMAINS, };