Commit e149573b authored Nov 20, 2019 by Will Deacon Committed by Greg Kroah-Hartman Nov 21, 2019

of: property: Add device link support for "iommu-map"



Commit 8e12257d ("of: property: Add device link support for iommus,
mboxes and io-channels") added device link support for IOMMU linkages
described using the "iommus" property. For PCI devices, this property
is not present and instead the "iommu-map" property is used on the host
bridge node to map the endpoint RequesterIDs to their corresponding
IOMMU instance.

Add support for "iommu-map" to the device link supplier bindings so that
probing of PCI devices can be deferred until after the IOMMU is
available.

Cc: Rob Herring <robh@kernel.org>
Cc: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Acked-by: Saravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/r/20191120190028.4722-1-will@kernel.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 38835391

drivers/of/property.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -1190,10 +1190,20 @@ DEFINE_SIMPLE_PROP(mboxes, "mboxes", "#mbox-cells")
		DEFINE_SIMPLE_PROP(io_channels, "io-channel", "#io-channel-cells")
		DEFINE_SUFFIX_PROP(regulators, "-supply", NULL)

		static struct device_node parse_iommu_maps(struct device_node np,
		const char *prop_name, int index)
		{
		if (strcmp(prop_name, "iommu-map"))
		return NULL;

		return of_parse_phandle(np, prop_name, (index * 4) + 1);
		}

		static const struct supplier_bindings of_supplier_bindings[] = {
		{ .parse_prop = parse_clocks, },
		{ .parse_prop = parse_interconnects, },
		{ .parse_prop = parse_iommus, },
		{ .parse_prop = parse_iommu_maps, },
		{ .parse_prop = parse_mboxes, },
		{ .parse_prop = parse_io_channels, },
		{ .parse_prop = parse_regulators, },

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