On Tue, Jul 21, 2020 at 09:02:41AM -0700, Dave Jiang wrote: > From: Megha Dey <megha.dey@xxxxxxxxx> > > The dev-msi interrupts are to be allocated/freed only for custom devices, > not standard PCI-MSIX devices. > > These interrupts are device-defined and they are distinct from the already > existing msi interrupts: > pci-msi: Standard PCI MSI/MSI-X setup format > platform-msi: Platform custom, but device-driver opaque MSI setup/control > arch-msi: fallback for devices not assigned to the generic PCI domain > dev-msi: device defined IRQ domain for ancillary devices. For e.g. DSA > portal devices use device specific IMS(Interrupt message store) interrupts. > > dev-msi interrupts are represented by their own device-type. That means > dev->msi_list is never contended for different interrupt types. It > will either be all PCI-MSI or all device-defined. Not sure I follow this, where is the enforcement that only dev-msi or normal MSI is being used at one time on a single struct device? Jason
