diff options
Diffstat (limited to 'drivers/gpu/drm/tegra/drm.c')
| -rw-r--r-- | drivers/gpu/drm/tegra/drm.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c index e1632fb03a8..6c9df794b3b 100644 --- a/drivers/gpu/drm/tegra/drm.c +++ b/drivers/gpu/drm/tegra/drm.c @@ -8,6 +8,7 @@ */ #include <linux/host1x.h> +#include <linux/iommu.h> #include "drm.h" #include "gem.h" @@ -33,6 +34,17 @@ static int tegra_drm_load(struct drm_device *drm, unsigned long flags) if (!tegra) return -ENOMEM; + if (iommu_present(&platform_bus_type)) { + tegra->domain = iommu_domain_alloc(&platform_bus_type); + if (IS_ERR(tegra->domain)) { + err = PTR_ERR(tegra->domain); + goto free; + } + + DRM_DEBUG("IOMMU context initialized\n"); + drm_mm_init(&tegra->mm, 0, SZ_2G); + } + mutex_init(&tegra->clients_lock); INIT_LIST_HEAD(&tegra->clients); drm->dev_private = tegra; @@ -76,6 +88,12 @@ fbdev: tegra_drm_fb_free(drm); config: drm_mode_config_cleanup(drm); + + if (tegra->domain) { + iommu_domain_free(tegra->domain); + drm_mm_takedown(&tegra->mm); + } +free: kfree(tegra); return err; } @@ -83,6 +101,7 @@ config: static int tegra_drm_unload(struct drm_device *drm) { struct host1x_device *device = to_host1x_device(drm->dev); + struct tegra_drm *tegra = drm->dev_private; int err; drm_kms_helper_poll_fini(drm); @@ -94,6 +113,11 @@ static int tegra_drm_unload(struct drm_device *drm) if (err < 0) return err; + if (tegra->domain) { + iommu_domain_free(tegra->domain); + drm_mm_takedown(&tegra->mm); + } + return 0; } |