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authorDmitry Osipenko <digetx@gmail.com>2018-12-12 23:38:56 +0300
committerJoerg Roedel <jroedel@suse.de>2019-01-16 13:54:12 +0100
commitce2785a75dbca27375f3723f4e697a2a8dc096ee (patch)
tree89451c3cdcc2103f759587db69e6eb9355423459 /drivers/iommu/tegra-gart.c
parent45594c683ef780f20f11b1e0018b933b6ff5d9a1 (diff)
iommu/tegra: gart: Integrate with Memory Controller driver
The device-tree binding has been changed. There is no separate GART device anymore, it is squashed into the Memory Controller. Integrate GART module with the MC in a way it is done for the SMMU on Tegra30+. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/tegra-gart.c')
-rw-r--r--drivers/iommu/tegra-gart.c71
1 files changed, 18 insertions, 53 deletions
diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
index 835fea461c59..b35ffa312a83 100644
--- a/drivers/iommu/tegra-gart.c
+++ b/drivers/iommu/tegra-gart.c
@@ -19,16 +19,17 @@
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#include <linux/init.h>
#include <linux/io.h>
#include <linux/iommu.h>
#include <linux/list.h>
#include <linux/moduleparam.h>
-#include <linux/of_device.h>
+#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/vmalloc.h>
+#include <soc/tegra/mc.h>
+
/* bitmap of the page sizes currently supported */
#define GART_IOMMU_PGSIZES (SZ_4K)
@@ -397,9 +398,8 @@ static const struct iommu_ops gart_iommu_ops = {
.iotlb_sync = gart_iommu_sync,
};
-static int tegra_gart_suspend(struct device *dev)
+int tegra_gart_suspend(struct gart_device *gart)
{
- struct gart_device *gart = dev_get_drvdata(dev);
unsigned long iova;
u32 *data = gart->savedata;
unsigned long flags;
@@ -411,9 +411,8 @@ static int tegra_gart_suspend(struct device *dev)
return 0;
}
-static int tegra_gart_resume(struct device *dev)
+int tegra_gart_resume(struct gart_device *gart)
{
- struct gart_device *gart = dev_get_drvdata(dev);
unsigned long flags;
spin_lock_irqsave(&gart->pte_lock, flags);
@@ -422,41 +421,33 @@ static int tegra_gart_resume(struct device *dev)
return 0;
}
-static int tegra_gart_probe(struct platform_device *pdev)
+struct gart_device *tegra_gart_probe(struct device *dev, struct tegra_mc *mc)
{
struct gart_device *gart;
- struct resource *res, *res_remap;
+ struct resource *res_remap;
void __iomem *gart_regs;
- struct device *dev = &pdev->dev;
int ret;
BUILD_BUG_ON(PAGE_SHIFT != GART_PAGE_SHIFT);
/* the GART memory aperture is required */
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- res_remap = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- if (!res || !res_remap) {
+ res_remap = platform_get_resource(to_platform_device(dev),
+ IORESOURCE_MEM, 1);
+ if (!res_remap) {
dev_err(dev, "GART memory aperture expected\n");
- return -ENXIO;
+ return ERR_PTR(-ENXIO);
}
gart = devm_kzalloc(dev, sizeof(*gart), GFP_KERNEL);
if (!gart) {
dev_err(dev, "failed to allocate gart_device\n");
- return -ENOMEM;
- }
-
- gart_regs = devm_ioremap(dev, res->start, resource_size(res));
- if (!gart_regs) {
- dev_err(dev, "failed to remap GART registers\n");
- return -ENXIO;
+ return ERR_PTR(-ENOMEM);
}
- ret = iommu_device_sysfs_add(&gart->iommu, &pdev->dev, NULL,
- dev_name(&pdev->dev));
+ ret = iommu_device_sysfs_add(&gart->iommu, dev, NULL, "gart");
if (ret) {
dev_err(dev, "Failed to register IOMMU in sysfs\n");
- return ret;
+ return ERR_PTR(ret);
}
iommu_device_set_ops(&gart->iommu, &gart_iommu_ops);
@@ -468,7 +459,8 @@ static int tegra_gart_probe(struct platform_device *pdev)
goto remove_sysfs;
}
- gart->dev = &pdev->dev;
+ gart->dev = dev;
+ gart_regs = mc->regs + GART_REG_BASE;
spin_lock_init(&gart->pte_lock);
spin_lock_init(&gart->client_lock);
INIT_LIST_HEAD(&gart->client);
@@ -483,46 +475,19 @@ static int tegra_gart_probe(struct platform_device *pdev)
goto unregister_iommu;
}
- platform_set_drvdata(pdev, gart);
do_gart_setup(gart, NULL);
gart_handle = gart;
- return 0;
+ return gart;
unregister_iommu:
iommu_device_unregister(&gart->iommu);
remove_sysfs:
iommu_device_sysfs_remove(&gart->iommu);
- return ret;
-}
-
-static const struct dev_pm_ops tegra_gart_pm_ops = {
- .suspend = tegra_gart_suspend,
- .resume = tegra_gart_resume,
-};
-
-static const struct of_device_id tegra_gart_of_match[] = {
- { .compatible = "nvidia,tegra20-gart", },
- { },
-};
-
-static struct platform_driver tegra_gart_driver = {
- .probe = tegra_gart_probe,
- .driver = {
- .name = "tegra-gart",
- .pm = &tegra_gart_pm_ops,
- .of_match_table = tegra_gart_of_match,
- .suppress_bind_attrs = true,
- },
-};
-
-static int __init tegra_gart_init(void)
-{
- return platform_driver_register(&tegra_gart_driver);
+ return ERR_PTR(ret);
}
-subsys_initcall(tegra_gart_init);
module_param(gart_debug, bool, 0644);
MODULE_PARM_DESC(gart_debug, "Enable GART debugging");