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iommu/ipmmu-vmsa: Modify ipmmu_slave_whitelist() to check SoC revisions 

Some R-Car Gen3 SoCs has hardware restrictions on the IPMMU. So,
to check whether this R-Car Gen3 SoC can use the IPMMU correctly,
this patch modifies the ipmmu_slave_whitelist().

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
hifive-unleashed-5.1
Yoshihiro Shimoda 2018-11-28 09:23:36 +00:00 committed by Joerg Roedel
parent 31fc9763f9
commit b7ee92c6ff
1 changed files with 26 additions and 8 deletions
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34
drivers/iommu/ipmmu-vmsa.c
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@ -751,12 +751,6 @@ 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_rcar_gen3[] = {
{ .soc_id = "r8a774a1", },
{ .soc_id = "r8a7795", },
@ -768,11 +762,35 @@ static const struct soc_device_attribute soc_rcar_gen3[] = {
{ /* sentinel */ }
};
static const struct soc_device_attribute soc_rcar_gen3_whitelist[] = {
{ .soc_id = "r8a7795", .revision = "ES3.*" },
{ .soc_id = "r8a77965", },
{ .soc_id = "r8a77990", },
{ .soc_id = "r8a77995", },
{ /* sentinel */ }
};
static bool ipmmu_slave_whitelist(struct device *dev)
{
/*
* For R-Car Gen3 use a white list to opt-in slave devices.
* For Other SoCs, this returns true anyway.
*/
if (!soc_device_match(soc_rcar_gen3))
return true;
/* Check whether this R-Car Gen3 can use the IPMMU correctly or not */
if (!soc_device_match(soc_rcar_gen3_whitelist))
return false;
/* By default, do not allow use of IPMMU */
return false;
}
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_rcar_gen3) && !ipmmu_slave_whitelist(dev))
if (!ipmmu_slave_whitelist(dev))
return -ENODEV;
iommu_fwspec_add_ids(dev, spec->args, 1);