On Thu, Nov 14, 2024 at 05:52:36PM -0500, Frank Li wrote: > ┌────────────┐ ┌───────────────────────────────────┐ ┌────────────────┐ > │ │ │ │ │ │ > │ │ │ PCI Endpoint │ │ PCI Host │ > │ │ │ │ │ │ > │ │◄──┤ 1.platform_msi_domain_alloc_irqs()│ │ │ > │ │ │ │ │ │ > │ MSI ├──►│ 2.write_msi_msg() ├──►├─BAR<n> │ > │ Controller │ │ update doorbell register address│ │ │ > │ │ │ for BAR │ │ │ > │ │ │ │ │ 3. Write BAR<n>│ > │ │◄──┼───────────────────────────────────┼───┤ │ > │ │ │ │ │ │ > │ ├──►│ 4.Irq Handle │ │ │ > │ │ │ │ │ │ > │ │ │ │ │ │ > └────────────┘ └───────────────────────────────────┘ └────────────────┘ > > This patches based on old https://lore.kernel.org/imx/20221124055036.1630573-1-Frank.Li@xxxxxxx/ > > Original patch only target to vntb driver. But actually it is common > method. > > This patches add new API to pci-epf-core, so any EP driver can use it. > > Previous v2 discussion here. > https://lore.kernel.org/imx/20230911220920.1817033-1-Frank.Li@xxxxxxx/ > > Changes in v7: > - Add helper function pci_epf_align_addr(); > - Link to v6: https://lore.kernel.org/r/20241112-ep-msi-v6-0-45f9722e3c2a@xxxxxxx V7 looks very nice! Tested-by: Niklas Cassel <cassel@xxxxxxxxxx>
