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drm/exynos: add iommu support for ipp

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This patch adds iommu support for IPP subsystem framework.
For this, it adds subdrv_probe/remove callback to enable or
disable ipp iommu.
We can get or put device address to a gem handle from user
through exynos_drm_gem_get/put_dma_addr().

Signed-off-by: Eunchul Kim <chulspro.kim@samsung.com>
Signed-off-by: Jinyoung Jeon <jy0.jeon@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
This commit is contained in:
Eunchul Kim 2012-12-14 17:58:54 +09:00 committed by Inki Dae
parent cb471f14b5
commit c12e2617b2
1 changed files with 18 additions and 0 deletions
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18
drivers/gpu/drm/exynos/exynos_drm_ipp.c
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@ -24,6 +24,7 @@
#include "exynos_drm_drv.h"
#include "exynos_drm_gem.h"
#include "exynos_drm_ipp.h"
#include "exynos_drm_iommu.h"
/*
* IPP is stand for Image Post Processing and
@ -1771,10 +1772,24 @@ static int ipp_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
ippdrv->event_workq = ctx->event_workq;
ippdrv->sched_event = ipp_sched_event;
INIT_LIST_HEAD(&ippdrv->cmd_list);
if (is_drm_iommu_supported(drm_dev)) {
ret = drm_iommu_attach_device(drm_dev, ippdrv->dev);
if (ret) {
DRM_ERROR("failed to activate iommu\n");
goto err_iommu;
}
}
}
return 0;
err_iommu:
/* get ipp driver entry */
list_for_each_entry_reverse(ippdrv, &exynos_drm_ippdrv_list, drv_list)
if (is_drm_iommu_supported(drm_dev))
drm_iommu_detach_device(drm_dev, ippdrv->dev);
err_idr:
idr_remove_all(&ctx->ipp_idr);
idr_remove_all(&ctx->prop_idr);
@ -1791,6 +1806,9 @@ static void ipp_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
/* get ipp driver entry */
list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list) {
if (is_drm_iommu_supported(drm_dev))
drm_iommu_detach_device(drm_dev, ippdrv->dev);
ippdrv->drm_dev = NULL;
exynos_drm_ippdrv_unregister(ippdrv);
}