On Wed, Dec 11 2024 at 13:39, Sasha Levin wrote: > platform-msi: Prepare for real per device domains > > [ Upstream commit c88f9110bfbca5975a8dee4c9792ba12684c7bca ] > > Provide functions to create and remove per device MSI domains which replace > the platform-MSI domains. The new model is that each of the devices which > utilize platform-MSI gets now its private MSI domain which is "customized" > in size and with a device specific function to write the MSI message into > the device. > > This is the same functionality as platform-MSI but it avoids all the down > sides of platform MSI, i.e. the extra ID book keeping, the special data > structure in the msi descriptor. Further the domains are only created when > the devices are really in use, so the burden is on the usage and not on the > infrastructure. > > Fill in the domain template and provide two functions to init/allocate and > remove a per device MSI domain. > > Until all users and parent domain providers are converted, the init/alloc > function invokes the original platform-MSI code when the irqdomain which is > associated to the device does not provide MSI parent functionality yet. > > Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > Signed-off-by: Anup Patel <apatel@xxxxxxxxxxxxxxxx> > Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > Link: https://lore.kernel.org/r/20240127161753.114685-6-apatel@xxxxxxxxxxxxxxxx > Stable-dep-of: 64506b3d23a3 ("scsi: ufs: qcom: Only free platform MSIs when ESI is enabled") See my other reply. Please don't backport the world if it's not really required. I'll send a backport of 64506b3d23a3 in a minute. Thanks, tglx
