#define pr_fmt(fmt) "iommu: " fmt
+#include <linux/amba/bus.h>
#include <linux/device.h>
#include <linux/dma-iommu.h>
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/slab.h>
#include <linux/errno.h>
+#include <linux/host1x_context_bus.h>
#include <linux/iommu.h>
#include <linux/idr.h>
#include <linux/err.h>
#include <linux/pci.h>
#include <linux/bitops.h>
+#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/fsl/mc.h>
#include <linux/module.h>
#define IOMMU_CMD_LINE_DMA_API BIT(0)
#define IOMMU_CMD_LINE_STRICT BIT(1)
+static int iommu_bus_notifier(struct notifier_block *nb,
+ unsigned long action, void *data);
static int iommu_alloc_default_domain(struct iommu_group *group,
struct device *dev);
static struct iommu_domain *__iommu_domain_alloc(struct bus_type *bus,
static LIST_HEAD(iommu_device_list);
static DEFINE_SPINLOCK(iommu_device_lock);
+static struct bus_type * const iommu_buses[] = {
+ &platform_bus_type,
+#ifdef CONFIG_PCI
+ &pci_bus_type,
+#endif
+#ifdef CONFIG_ARM_AMBA
+ &amba_bustype,
+#endif
+#ifdef CONFIG_FSL_MC_BUS
+ &fsl_mc_bus_type,
+#endif
+#ifdef CONFIG_TEGRA_HOST1X_CONTEXT_BUS
+ &host1x_context_device_bus_type,
+#endif
+};
+
/*
* Use a function instead of an array here because the domain-type is a
* bit-field, so an array would waste memory.
static int __init iommu_subsys_init(void)
{
+ struct notifier_block *nb;
+
if (!(iommu_cmd_line & IOMMU_CMD_LINE_DMA_API)) {
if (IS_ENABLED(CONFIG_IOMMU_DEFAULT_PASSTHROUGH))
iommu_set_default_passthrough(false);
(iommu_cmd_line & IOMMU_CMD_LINE_STRICT) ?
"(set via kernel command line)" : "");
+ nb = kcalloc(ARRAY_SIZE(iommu_buses), sizeof(*nb), GFP_KERNEL);
+ if (!nb)
+ return -ENOMEM;
+
+ for (int i = 0; i < ARRAY_SIZE(iommu_buses); i++) {
+ nb[i].notifier_call = iommu_bus_notifier;
+ bus_register_notifier(iommu_buses[i], &nb[i]);
+ }
+
return 0;
}
subsys_initcall(iommu_subsys_init);
return ret;
}
-static int iommu_bus_init(struct bus_type *bus, const struct iommu_ops *ops)
-{
- struct notifier_block *nb;
- int err;
-
- nb = kzalloc(sizeof(struct notifier_block), GFP_KERNEL);
- if (!nb)
- return -ENOMEM;
-
- nb->notifier_call = iommu_bus_notifier;
-
- err = bus_register_notifier(bus, nb);
- if (err)
- goto out_free;
-
- err = bus_iommu_probe(bus);
- if (err)
- goto out_err;
-
-
- return 0;
-
-out_err:
- /* Clean up */
- bus_for_each_dev(bus, NULL, NULL, remove_iommu_group);
- bus_unregister_notifier(bus, nb);
-
-out_free:
- kfree(nb);
-
- return err;
-}
-
/**
* bus_set_iommu - set iommu-callbacks for the bus
* @bus: bus.
bus->iommu_ops = ops;
/* Do IOMMU specific setup for this bus-type */
- err = iommu_bus_init(bus, ops);
- if (err)
+ err = bus_iommu_probe(bus);
+ if (err) {
+ /* Clean up */
+ bus_for_each_dev(bus, NULL, NULL, remove_iommu_group);
bus->iommu_ops = NULL;
+ }
return err;
}