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Diffstat (limited to 'drivers/iommu/ipmmu-vmsa.c')
-rw-r--r--drivers/iommu/ipmmu-vmsa.c91
1 files changed, 64 insertions, 27 deletions
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
index b98a03189580..7a4529c61c19 100644
--- a/drivers/iommu/ipmmu-vmsa.c
+++ b/drivers/iommu/ipmmu-vmsa.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
/*
- * IPMMU VMSA
+ * IOMMU API for Renesas VMSA-compatible IPMMU
+ * Author: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
*
* Copyright (C) 2014 Renesas Electronics Corporation
*/
@@ -11,10 +12,10 @@
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/export.h>
+#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iommu.h>
-#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_iommu.h>
@@ -81,7 +82,9 @@ static struct ipmmu_vmsa_domain *to_vmsa_domain(struct iommu_domain *dom)
static struct ipmmu_vmsa_device *to_ipmmu(struct device *dev)
{
- return dev->iommu_fwspec ? dev->iommu_fwspec->iommu_priv : NULL;
+ struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
+
+ return fwspec ? fwspec->iommu_priv : NULL;
}
#define TLB_LOOP_TIMEOUT 100 /* 100us */
@@ -498,6 +501,9 @@ static int ipmmu_domain_init_context(struct ipmmu_vmsa_domain *domain)
static void ipmmu_domain_destroy_context(struct ipmmu_vmsa_domain *domain)
{
+ if (!domain->mmu)
+ return;
+
/*
* Disable the context. Flush the TLB as required when modifying the
* context registers.
@@ -640,7 +646,7 @@ static void ipmmu_domain_free(struct iommu_domain *io_domain)
static int ipmmu_attach_device(struct iommu_domain *io_domain,
struct device *dev)
{
- struct iommu_fwspec *fwspec = dev->iommu_fwspec;
+ struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct ipmmu_vmsa_device *mmu = to_ipmmu(dev);
struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);
unsigned int i;
@@ -689,7 +695,7 @@ static int ipmmu_attach_device(struct iommu_domain *io_domain,
static void ipmmu_detach_device(struct iommu_domain *io_domain,
struct device *dev)
{
- struct iommu_fwspec *fwspec = dev->iommu_fwspec;
+ struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);
unsigned int i;
@@ -741,36 +747,71 @@ static phys_addr_t ipmmu_iova_to_phys(struct iommu_domain *io_domain,
static int ipmmu_init_platform_device(struct device *dev,
struct of_phandle_args *args)
{
+ struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct platform_device *ipmmu_pdev;
ipmmu_pdev = of_find_device_by_node(args->np);
if (!ipmmu_pdev)
return -ENODEV;
- dev->iommu_fwspec->iommu_priv = platform_get_drvdata(ipmmu_pdev);
- return 0;
-}
+ fwspec->iommu_priv = platform_get_drvdata(ipmmu_pdev);
-static bool ipmmu_slave_whitelist(struct device *dev)
-{
- /* By default, do not allow use of IPMMU */
- return false;
+ return 0;
}
static const struct soc_device_attribute soc_rcar_gen3[] = {
+ { .soc_id = "r8a774a1", },
+ { .soc_id = "r8a774c0", },
{ .soc_id = "r8a7795", },
{ .soc_id = "r8a7796", },
{ .soc_id = "r8a77965", },
{ .soc_id = "r8a77970", },
+ { .soc_id = "r8a77990", },
+ { .soc_id = "r8a77995", },
+ { /* sentinel */ }
+};
+
+static const struct soc_device_attribute soc_rcar_gen3_whitelist[] = {
+ { .soc_id = "r8a774c0", },
+ { .soc_id = "r8a7795", .revision = "ES3.*" },
+ { .soc_id = "r8a77965", },
+ { .soc_id = "r8a77990", },
{ .soc_id = "r8a77995", },
{ /* sentinel */ }
};
+static const char * const rcar_gen3_slave_whitelist[] = {
+};
+
+static bool ipmmu_slave_whitelist(struct device *dev)
+{
+ unsigned int i;
+
+ /*
+ * 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;
+
+ /* Check whether this slave device can work with the IPMMU */
+ for (i = 0; i < ARRAY_SIZE(rcar_gen3_slave_whitelist); i++) {
+ if (!strcmp(dev_name(dev), rcar_gen3_slave_whitelist[i]))
+ return true;
+ }
+
+ /* Otherwise, 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);
@@ -938,6 +979,12 @@ static const struct of_device_id ipmmu_of_ids[] = {
.compatible = "renesas,ipmmu-vmsa",
.data = &ipmmu_features_default,
}, {
+ .compatible = "renesas,ipmmu-r8a774a1",
+ .data = &ipmmu_features_rcar_gen3,
+ }, {
+ .compatible = "renesas,ipmmu-r8a774c0",
+ .data = &ipmmu_features_rcar_gen3,
+ }, {
.compatible = "renesas,ipmmu-r8a7795",
.data = &ipmmu_features_rcar_gen3,
}, {
@@ -950,6 +997,9 @@ static const struct of_device_id ipmmu_of_ids[] = {
.compatible = "renesas,ipmmu-r8a77970",
.data = &ipmmu_features_rcar_gen3,
}, {
+ .compatible = "renesas,ipmmu-r8a77990",
+ .data = &ipmmu_features_rcar_gen3,
+ }, {
.compatible = "renesas,ipmmu-r8a77995",
.data = &ipmmu_features_rcar_gen3,
}, {
@@ -957,8 +1007,6 @@ static const struct of_device_id ipmmu_of_ids[] = {
},
};
-MODULE_DEVICE_TABLE(of, ipmmu_of_ids);
-
static int ipmmu_probe(struct platform_device *pdev)
{
struct ipmmu_vmsa_device *mmu;
@@ -1129,15 +1177,4 @@ static int __init ipmmu_init(void)
setup_done = true;
return 0;
}
-
-static void __exit ipmmu_exit(void)
-{
- return platform_driver_unregister(&ipmmu_driver);
-}
-
subsys_initcall(ipmmu_init);
-module_exit(ipmmu_exit);
-
-MODULE_DESCRIPTION("IOMMU API for Renesas VMSA-compatible IPMMU");
-MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
-MODULE_LICENSE("GPL v2");