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1c3b002c6b
Implement the doorbell feature by mapping the EP's MSI interrupt controller message address to a dedicated BAR. The EPF driver should pass the actual message data to be written to the message address by the host through implementation-specific logic. Signed-off-by: Frank Li <Frank.Li@nxp.com> [mani: minor code cleanups and reworded commit message] Signed-off-by: Manivannan Sadhasivam <mani@kernel.org> [bhelgaas: fix kernel-doc] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Tested-by: Niklas Cassel <cassel@kernel.org> Link: https://patch.msgid.link/20250710-ep-msi-v21-3-57683fc7fb25@nxp.com
42 lines
1.2 KiB
Plaintext
42 lines
1.2 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0
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#
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# PCI Endpoint Support
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#
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menu "PCI Endpoint"
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config PCI_ENDPOINT
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bool "PCI Endpoint Support"
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depends on HAVE_PCI
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help
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Enable this configuration option to support configurable PCI
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endpoint. This should be enabled if the platform has a PCI
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controller that can operate in endpoint mode.
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Enabling this option will build the endpoint library, which
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includes endpoint controller library and endpoint function
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library.
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If in doubt, say "N" to disable Endpoint support.
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config PCI_ENDPOINT_CONFIGFS
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bool "PCI Endpoint Configfs Support"
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depends on PCI_ENDPOINT
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select CONFIGFS_FS
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help
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This will enable the configfs entry that can be used to
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configure the endpoint function and used to bind the
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function with an endpoint controller.
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config PCI_ENDPOINT_MSI_DOORBELL
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bool "PCI Endpoint MSI Doorbell Support"
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depends on PCI_ENDPOINT && GENERIC_MSI_IRQ
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help
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This enables the EP's MSI interrupt controller to function as a
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doorbell. The RC can trigger doorbell in EP by writing data to a
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dedicated BAR, which the EP maps to the controller's message address.
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source "drivers/pci/endpoint/functions/Kconfig"
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endmenu
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