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Revert "iommu/arm-smmu: Make arm-smmu explicitly non-modular" 

This reverts commit addb672f20.

Let's get the SMMU driver building as a module, which means putting
back some dead code that we used to carry.

Signed-off-by: Will Deacon <will@kernel.org>
Tested-by: John Garry <john.garry@huawei.com> # smmu v3
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Will Deacon 2019-12-19 12:03:45 +00:00 committed by Joerg Roedel
parent 6e8fa7404c
commit b06c076ea9
1 changed files with 19 additions and 13 deletions
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32
drivers/iommu/arm-smmu.c
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@ -27,8 +27,7 @@
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/init.h>
#include <linux/moduleparam.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
@ -60,10 +59,6 @@
#define MSI_IOVA_LENGTH 0x100000
static int force_stage;
/*
* not really modular, but the easiest way to keep compat with existing
* bootargs behaviour is to continue using module_param() here.
*/
module_param(force_stage, int, S_IRUGO);
MODULE_PARM_DESC(force_stage,
"Force SMMU mappings to be installed at a particular stage of translation. A value of '1' or '2' forces the corresponding stage. All other values are ignored (i.e. no stage is forced). Note that selecting a specific stage will disable support for nested translation.");
@ -1911,6 +1906,7 @@ static const struct of_device_id arm_smmu_of_match[] = {
{ .compatible = "qcom,smmu-v2", .data = &qcom_smmuv2 },
{ },
};
MODULE_DEVICE_TABLE(of, arm_smmu_of_match);
#ifdef CONFIG_ACPI
static int acpi_smmu_get_data(u32 model, struct arm_smmu_device *smmu)
@ -2196,12 +2192,12 @@ static int arm_smmu_legacy_bus_init(void)
}
device_initcall_sync(arm_smmu_legacy_bus_init);
static void arm_smmu_device_shutdown(struct platform_device *pdev)
static int arm_smmu_device_remove(struct platform_device *pdev)
{
struct arm_smmu_device *smmu = platform_get_drvdata(pdev);
if (!smmu)
return;
return -ENODEV;
if (!bitmap_empty(smmu->context_map, ARM_SMMU_MAX_CBS))
dev_err(&pdev->dev, "removing device with active domains!\n");
@ -2217,6 +2213,12 @@ static void arm_smmu_device_shutdown(struct platform_device *pdev)
clk_bulk_disable(smmu->num_clks, smmu->clks);
clk_bulk_unprepare(smmu->num_clks, smmu->clks);
return 0;
}
static void arm_smmu_device_shutdown(struct platform_device *pdev)
{
arm_smmu_device_remove(pdev);
}
static int __maybe_unused arm_smmu_runtime_resume(struct device *dev)
@ -2266,12 +2268,16 @@ static const struct dev_pm_ops arm_smmu_pm_ops = {
static struct platform_driver arm_smmu_driver = {
.driver = {
.name = "arm-smmu",
.of_match_table = of_match_ptr(arm_smmu_of_match),
.pm = &arm_smmu_pm_ops,
.suppress_bind_attrs = true,
.name = "arm-smmu",
.of_match_table = of_match_ptr(arm_smmu_of_match),
.pm = &arm_smmu_pm_ops,
},
.probe = arm_smmu_device_probe,
.remove = arm_smmu_device_remove,
.shutdown = arm_smmu_device_shutdown,
};
builtin_platform_driver(arm_smmu_driver);
module_platform_driver(arm_smmu_driver);
MODULE_DESCRIPTION("IOMMU API for ARM architected SMMU implementations");
MODULE_AUTHOR("Will Deacon <will.deacon@arm.com>");
MODULE_LICENSE("GPL v2");