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Commit c12e2617 authored by Eunchul Kim's avatar Eunchul Kim Committed by Inki Dae
Browse files

drm/exynos: add iommu support for ipp 



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: default avatarEunchul Kim <chulspro.kim@samsung.com>
Signed-off-by: default avatarJinyoung Jeon <jy0.jeon@samsung.com>
Signed-off-by: default avatarInki Dae <inki.dae@samsung.com>
Signed-off-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
parent cb471f14

drivers/gpu/drm/exynos/exynos_drm_ipp.c

+18 −0
Original line number Diff line number Diff line
@@ -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);

	}