On Mon, Sep 15, 2025 at 06:22:43PM -0400, Frank Li wrote:
> Since commit 1c3b002c6bf68 PCI: endpoint: Add RC-to-EP doorbell support
> using platform MSI controller, PCI EP can get notification from Host.
>
> VNTB use this feature to reduce ping latency.
>
> The first patch impove epf core API to allow set any MMIO address to specfic
> bar.
>
> The second patch add MSI doorbell support.
Manivannan Sadhasivam:
Do you have chance to check these patch again?
Frank
>
> Signed-off-by: Frank Li <Frank.Li@nxp.com>
> ---
> Changes in v2:
> - add help funciton to get bar's inbounce size
> - fix miss x8 when caculate bits
> - Link to v1: https://lore.kernel.org/r/20250815-vntb_msi_doorbell-v1-0-32df6c4bf96c@nxp.com
>
> ---
> Frank Li (3):
> PCI: endpoint: Add helper function pci_epf_get_bar_required_size()
> PCI: endpoint: Add API pci_epf_set_inbound_space()
> PCI: endpoint: pci-epf-vntb: Add MSI doorbell support
>
> drivers/pci/endpoint/functions/pci-epf-vntb.c | 153 +++++++++++++++++++++++---
> drivers/pci/endpoint/pci-epf-core.c | 138 ++++++++++++++++++++---
> include/linux/pci-epf.h | 6 +
> 3 files changed, 262 insertions(+), 35 deletions(-)
> ---
> base-commit: c2a282d1fccc53a989da61a5da4f03c9d67ee99a
> change-id: 20250812-vntb_msi_doorbell-bf0fbac6d6d7
>
> Best regards,
> --
> Frank Li <Frank.Li@nxp.com>
>