c6aeaf56f4
DMA-BUF requires that each device that accesses a DMA-BUF attaches to it separately. To do so the host1x_bo_pin() and host1x_bo_unpin() functions need to be reimplemented so that they can return a mapping, which either represents an attachment or a map of the driver's own GEM object. Signed-off-by: Thierry Reding <treding@nvidia.com>
58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* Copyright (c) 2020 NVIDIA Corporation */
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#ifndef _TEGRA_DRM_UAPI_H
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#define _TEGRA_DRM_UAPI_H
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#include <linux/dma-mapping.h>
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#include <linux/idr.h>
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#include <linux/kref.h>
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#include <linux/xarray.h>
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#include <drm/drm.h>
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struct drm_file;
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struct drm_device;
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struct tegra_drm_file {
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/* Legacy UAPI state */
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struct idr legacy_contexts;
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struct mutex lock;
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/* New UAPI state */
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struct xarray contexts;
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struct xarray syncpoints;
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};
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struct tegra_drm_mapping {
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struct kref ref;
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struct host1x_bo_mapping *map;
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struct host1x_bo *bo;
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dma_addr_t iova;
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dma_addr_t iova_end;
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};
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int tegra_drm_ioctl_channel_open(struct drm_device *drm, void *data,
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struct drm_file *file);
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int tegra_drm_ioctl_channel_close(struct drm_device *drm, void *data,
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struct drm_file *file);
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int tegra_drm_ioctl_channel_map(struct drm_device *drm, void *data,
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struct drm_file *file);
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int tegra_drm_ioctl_channel_unmap(struct drm_device *drm, void *data,
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struct drm_file *file);
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int tegra_drm_ioctl_channel_submit(struct drm_device *drm, void *data,
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struct drm_file *file);
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int tegra_drm_ioctl_syncpoint_allocate(struct drm_device *drm, void *data,
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struct drm_file *file);
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int tegra_drm_ioctl_syncpoint_free(struct drm_device *drm, void *data,
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struct drm_file *file);
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int tegra_drm_ioctl_syncpoint_wait(struct drm_device *drm, void *data,
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struct drm_file *file);
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void tegra_drm_uapi_close_file(struct tegra_drm_file *file);
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void tegra_drm_mapping_put(struct tegra_drm_mapping *mapping);
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#endif
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