PCI/DOE: Add DOE mailbox support functions

Introduced in a PCIe r6.0, sec 6.30, DOE provides a config space based mailbox with standard protocol discovery. Each mailbox is accessed through a DOE Extended Capability. Each DOE mailbox must support the DOE discovery protocol in addition to any number of additional protocols. Define core PCIe functionality to manage a single PCIe DOE mailbox at a defined config space offset. Functionality includes iterating, creating, query of supported protocol, and task submission. Destruction of the mailboxes is device managed. Cc: "Li, Ming" <[email protected]> Cc: Bjorn Helgaas <[email protected]> Cc: Matthew Wilcox <[email protected]> Acked-by: Bjorn Helgaas <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]> Co-developed-by: Ira Weiny <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Dan Williams <[email protected]>
chewitt · Jul 19, 2022 · 9d24322 · 9d24322
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commit 9d24322
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diff --git a/.clang-format b/.clang-format
@@ -516,6 +516,7 @@ ForEachMacros:
   - 'of_property_for_each_string'
   - 'of_property_for_each_u32'
   - 'pci_bus_for_each_resource'
+  - 'pci_doe_for_each_off'
   - 'pcl_for_each_chunk'
   - 'pcl_for_each_segment'
   - 'pcm_for_each_format'

diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
@@ -121,6 +121,9 @@ config XEN_PCIDEV_FRONTEND
 config PCI_ATS
 	bool
 
+config PCI_DOE
+	bool
+
 config PCI_ECAM
 	bool
 

diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
@@ -31,6 +31,7 @@ obj-$(CONFIG_PCI_ECAM)		+= ecam.o
 obj-$(CONFIG_PCI_P2PDMA)	+= p2pdma.o
 obj-$(CONFIG_XEN_PCIDEV_FRONTEND) += xen-pcifront.o
 obj-$(CONFIG_VGA_ARB)		+= vgaarb.o
+obj-$(CONFIG_PCI_DOE)		+= doe.o
 
 # Endpoint library must be initialized before its users
 obj-$(CONFIG_PCI_ENDPOINT)	+= endpoint/