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drm/tegra: Move IOMMU group into host1x client

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Handling of the IOMMU group attachment is common to all clients, so move
the group into the client to simplify code.

Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding
2019-02-08 14:35:13 +01:00
parent 7baa943e0b
commit aacdf19849
8 changed files with 32 additions and 40 deletions
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22
drivers/gpu/drm/tegra/drm.c
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@@ -1068,8 +1068,7 @@ int tegra_drm_unregister_client(struct tegra_drm *tegra,
return 0;
}
struct iommu_group *host1x_client_iommu_attach(struct host1x_client *client,
bool shared)
int host1x_client_iommu_attach(struct host1x_client *client, bool shared)
{
struct drm_device *drm = dev_get_drvdata(client->parent);
struct tegra_drm *tegra = drm->dev_private;
@@ -1080,7 +1079,7 @@ struct iommu_group *host1x_client_iommu_attach(struct host1x_client *client,
group = iommu_group_get(client->dev);
if (!group) {
dev_err(client->dev, "failed to get IOMMU group\n");
return ERR_PTR(-ENODEV);
return -ENODEV;
}
if (!shared || (shared && (group != tegra->group))) {
@@ -1095,7 +1094,7 @@ struct iommu_group *host1x_client_iommu_attach(struct host1x_client *client,
err = iommu_attach_group(tegra->domain, group);
if (err < 0) {
iommu_group_put(group);
return ERR_PTR(err);
return err;
}
if (shared && !tegra->group)
@@ -1103,22 +1102,23 @@ struct iommu_group *host1x_client_iommu_attach(struct host1x_client *client,
}
}
return group;
client->group = group;
return 0;
}
void host1x_client_iommu_detach(struct host1x_client *client,
struct iommu_group *group)
void host1x_client_iommu_detach(struct host1x_client *client)
{
struct drm_device *drm = dev_get_drvdata(client->parent);
struct tegra_drm *tegra = drm->dev_private;
if (group) {
if (group == tegra->group) {
iommu_detach_group(tegra->domain, group);
if (client->group) {
if (client->group == tegra->group) {
iommu_detach_group(tegra->domain, client->group);
tegra->group = NULL;
}
iommu_group_put(group);
iommu_group_put(client->group);
}
}