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Commit 58b8e8bf authored by Magnus Damm's avatar Magnus Damm Committed by Alex Williamson
Browse files

iommu/ipmmu-vmsa: Hook up r8a7795 DT matching code 



Tie in r8a7795 features and update the IOMMU_OF_DECLARE
compat string to include the updated compat string.

Signed-off-by: default avatarMagnus Damm <damm+renesas@opensource.se>
Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
parent c295f504

drivers/iommu/ipmmu-vmsa.c

+29 −0
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ 
#include <linux/platform_device.h>

#include <linux/sizes.h>

#include <linux/slab.h>

#include <linux/sys_soc.h>



#if defined(CONFIG_ARM) && !defined(CONFIG_IOMMU_DMA)

#include <asm/dma-iommu.h>
@@ -749,9 +750,24 @@ static int ipmmu_init_platform_device(struct device *dev, 
	return 0;

}



static bool ipmmu_slave_whitelist(struct device *dev)

{

	/* By default, do not allow use of IPMMU */

	return false;

}



static const struct soc_device_attribute soc_r8a7795[] = {

	{ .soc_id = "r8a7795", },

	{ /* sentinel */ }

};



static int ipmmu_of_xlate(struct device *dev,

			  struct of_phandle_args *spec)

{

	/* For R-Car Gen3 use a white list to opt-in slave devices */

	if (soc_device_match(soc_r8a7795) && !ipmmu_slave_whitelist(dev))

		return -ENODEV;



	iommu_fwspec_add_ids(dev, spec->args, 1);



	/* Initialize once - xlate() will call multiple times */
@@ -903,10 +919,21 @@ static const struct ipmmu_features ipmmu_features_default = { 
	.twobit_imttbcr_sl0 = false,

};



static const struct ipmmu_features ipmmu_features_r8a7795 = {

	.use_ns_alias_offset = false,

	.has_cache_leaf_nodes = true,

	.number_of_contexts = 8,

	.setup_imbuscr = false,

	.twobit_imttbcr_sl0 = true,

};



static const struct of_device_id ipmmu_of_ids[] = {

	{

		.compatible = "renesas,ipmmu-vmsa",

		.data = &ipmmu_features_default,

	}, {

		.compatible = "renesas,ipmmu-r8a7795",

		.data = &ipmmu_features_r8a7795,

	}, {

		/* Terminator */

	},
@@ -1090,6 +1117,8 @@ static int __init ipmmu_vmsa_iommu_of_setup(struct device_node *np) 


IOMMU_OF_DECLARE(ipmmu_vmsa_iommu_of, "renesas,ipmmu-vmsa",

		 ipmmu_vmsa_iommu_of_setup);

IOMMU_OF_DECLARE(ipmmu_r8a7795_iommu_of, "renesas,ipmmu-r8a7795",

		 ipmmu_vmsa_iommu_of_setup);

#endif



MODULE_DESCRIPTION("IOMMU API for Renesas VMSA-compatible IPMMU");