linux-kernel - Re: [PATCH v2 0/3] pci: endpoint: vntb: add MSI doorbell support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <aNQbF/5gX9VXlv0o@lizhi-Precision-Tower-5810>
Date: Wed, 24 Sep 2025 12:23:51 -0400
From: Frank Li <Frank.li@....com>
To: Manivannan Sadhasivam <mani@...nel.org>,
	Krzysztof Wilczyński <kwilczynski@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>, Jon Mason <jdmason@...zu.us>,
	Dave Jiang <dave.jiang@...el.com>, Allen Hubbe <allenbh@...il.com>
Cc: linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	ntb@...ts.linux.dev, imx@...ts.linux.dev
Subject: Re: [PATCH v2 0/3] pci: endpoint: vntb: add MSI doorbell support

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@....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@....com>
>