linux-kernel - [PATCH 0/2] pci: endpoint: vntb: add MSI doorbell support

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Message-Id: <20250815-vntb_msi_doorbell-v1-0-32df6c4bf96c@nxp.com>
Date: Fri, 15 Aug 2025 18:20:52 -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, Frank Li <Frank.Li@....com>
Subject: [PATCH 0/2] pci: endpoint: vntb: add MSI doorbell support

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.

Signed-off-by: Frank Li <Frank.Li@....com>
---
Frank Li (2):
      PCI: endpoint: Enhance pci_epf_alloc_space() and rename to 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           |  69 +++++++++---
 include/linux/pci-epc.h                       |   5 -
 include/linux/pci-epf.h                       |  35 +++++-
 4 files changed, 223 insertions(+), 39 deletions(-)
---
base-commit: c2a282d1fccc53a989da61a5da4f03c9d67ee99a
change-id: 20250812-vntb_msi_doorbell-bf0fbac6d6d7

Best regards,
--
Frank Li <Frank.Li@....com>