| From: |
| Frank Li <Frank.Li-AT-nxp.com> |
| To: |
| Manivannan Sadhasivam <mani-AT-kernel.org>, Krzysztof Wilczyński <kwilczynski-AT-kernel.org>, Kishon Vijay Abraham I <kishon-AT-kernel.org>, Bjorn Helgaas <bhelgaas-AT-google.com>, Jon Mason <jdmason-AT-kudzu.us>, Dave Jiang <dave.jiang-AT-intel.com>, Allen Hubbe <allenbh-AT-gmail.com> |
| Subject: |
| [PATCH v4 0/3] pci: endpoint: vntb: add MSI doorbell support |
| Date: |
| Tue, 30 Sep 2025 16:39:36 -0400 |
| Message-ID: |
| <20250930-vntb_msi_doorbell-v4-0-ea2c94c6ff2e@nxp.com> |
| Cc: |
| linux-pci-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org, ntb-AT-lists.linux.dev, imx-AT-lists.linux.dev, Frank Li <Frank.Li-AT-nxp.com> |
| Archive-link: |
| Article |
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@nxp.com>
---
Changes in v4:
- use 'bar_size' instead of aligned_bar_size
- Link to v3: https://lore.kernel.org/r/20250925-vntb_msi_doorbell-v3-0...
Changes in v3:
- update function name to pci_epf_assign_bar_space()
- detail check each patch's change log
- Link to v2: https://lore.kernel.org/r/20250915-vntb_msi_doorbell-v2-0...
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...
---
Frank Li (3):
PCI: endpoint: Add helper function pci_epf_get_bar_required_size()
PCI: endpoint: Add API pci_epf_assign_bar_space()
PCI: endpoint: pci-epf-vntb: Add MSI doorbell support
drivers/pci/endpoint/functions/pci-epf-vntb.c | 152 +++++++++++++++++++++---
drivers/pci/endpoint/pci-epf-core.c | 161 +++++++++++++++++++++-----
include/linux/pci-epf.h | 6 +
3 files changed, 272 insertions(+), 47 deletions(-)
---
base-commit: c2a282d1fccc53a989da61a5da4f03c9d67ee99a
change-id: 20250812-vntb_msi_doorbell-bf0fbac6d6d7
Best regards,
--
Frank Li <Frank.Li@nxp.com>
