From: Frank Li <Frank.Li@nxp.com>
To: tglx@linutronix.de
Cc: aisheng.dong@nxp.com, bhelgaas@google.com,
devicetree@vger.kernel.org, festevam@gmail.com, frank.li@nxp.com,
imx@lists.linux.dev, jdmason@kudzu.us, kernel@pengutronix.de,
kishon@ti.com, krzysztof.kozlowski+dt@linaro.org, kw@linux.com,
linux-arm-kernel@lists.infradead.org, linux-imx@nxp.com,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
lorenzo.pieralisi@arm.com, lpieralisi@kernel.org,
manivannan.sadhasivam@linaro.org, maz@kernel.org,
ntb@lists.linux.dev, peng.fan@nxp.com, robh+dt@kernel.org,
s.hauer@pengutronix.de, shawnguo@kernel.org
Subject: [PATCH 0/3] Add RC-to-EP doorbell with platform MSI controller
Date: Wed, 26 Apr 2023 16:34:33 -0400 [thread overview]
Message-ID: <20230426203436.1277307-1-Frank.Li@nxp.com> (raw)
┌────────────┐ ┌───────────────────────────────────┐ ┌────────────────┐
│ │ │ │ │ │
│ │ │ 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@nxp.com/
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.
The key point is comments from Thomas Gleixner, who suggest use new
PCI/IMS. But arm platform change still not be merged yet.
git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git devmsi-v2-arm
So I still use existed method implement RC to EP doorbell.
If Thomas Gleixner want to continue work on devmsi-v2-arm, I can help test
and update this patch.
Frank Li (3):
PCI: endpoint: Add RC-to-EP doorbell support using platform MSI
controller
misc: pci_endpoint_test: Add doorbell test case
tools: PCI: Add 'B' option for test doorbell
drivers/misc/pci_endpoint_test.c | 41 +++++++++++
drivers/pci/endpoint/pci-epf-core.c | 109 ++++++++++++++++++++++++++++
include/linux/pci-epf.h | 16 ++++
include/uapi/linux/pcitest.h | 1 +
tools/pci/pcitest.c | 16 +++-
5 files changed, 182 insertions(+), 1 deletion(-)
--
2.34.1
next reply other threads:[~2023-04-26 20:35 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-26 20:34 Frank Li [this message]
2023-04-26 20:34 ` [PATCH 1/3] PCI: endpoint: Add RC-to-EP doorbell support using platform MSI controller Frank Li
2023-09-02 4:52 ` Manivannan Sadhasivam
2023-09-02 4:53 ` Manivannan Sadhasivam
2023-09-06 4:24 ` Frank Li
2023-09-06 12:26 ` Manivannan Sadhasivam
2023-09-06 14:33 ` Frank Li
2023-09-06 14:52 ` Manivannan Sadhasivam
2023-09-06 15:00 ` Frank Li
2023-09-06 15:27 ` Manivannan Sadhasivam
2023-09-06 15:36 ` Frank Li
2023-04-26 20:34 ` [PATCH 2/3] misc: pci_endpoint_test: Add doorbell test case Frank Li
2023-09-02 5:11 ` Manivannan Sadhasivam
2023-04-26 20:34 ` [PATCH 3/3] tools: PCI: Add 'B' option for test doorbell Frank Li
2023-05-12 14:45 ` [PATCH 0/3] Add RC-to-EP doorbell with platform MSI controller Frank Li
2023-06-12 16:17 ` Frank Li
2023-07-17 14:06 ` Frank Li
2023-08-24 19:01 ` Frank Li
2023-08-25 8:34 ` Manivannan Sadhasivam
2023-08-30 7:36 ` Li Chen
2023-08-30 18:27 ` Frank Li
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