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38f993b7c5
The API is not suitable for subsystems consisting of multiple devices and requires severe hacks to use it. To mitigate this, this patch implements allocation and address space management locally by using helpers provided by DRM framework, like other DRM drivers do, e.g. Tegra. This patch should not introduce any functional changes until the driver is made to attach subdevices into an IOMMU domain with the generic IOMMU API, which will happen in following patch. Based heavily on GEM implementation of Tegra DRM driver. Signed-off-by: Tomasz Figa <tfiga@chromium.org> Signed-off-by: Shunqian Zheng <zhengsq@rock-chips.com> Signed-off-by: Mark Yao <mark.yao@rock-chips.com> Signed-off-by: rjan Eide <orjan.eide@arm.com>
63 lines
2 KiB
C
63 lines
2 KiB
C
/*
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* Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
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* Author:Mark Yao <mark.yao@rock-chips.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _ROCKCHIP_DRM_GEM_H
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#define _ROCKCHIP_DRM_GEM_H
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#define to_rockchip_obj(x) container_of(x, struct rockchip_gem_object, base)
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struct rockchip_gem_object {
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struct drm_gem_object base;
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unsigned int flags;
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void *kvaddr;
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dma_addr_t dma_addr;
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/* Used when IOMMU is disabled */
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unsigned long dma_attrs;
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/* Used when IOMMU is enabled */
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struct drm_mm_node mm;
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unsigned long num_pages;
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struct page **pages;
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struct sg_table *sgt;
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size_t size;
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};
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struct sg_table *rockchip_gem_prime_get_sg_table(struct drm_gem_object *obj);
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struct drm_gem_object *
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rockchip_gem_prime_import_sg_table(struct drm_device *dev, size_t size,
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struct sg_table *sgt);
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void *rockchip_gem_prime_vmap(struct drm_gem_object *obj);
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void rockchip_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
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/* drm driver mmap file operations */
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int rockchip_gem_mmap(struct file *filp, struct vm_area_struct *vma);
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/* mmap a gem object to userspace. */
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int rockchip_gem_mmap_buf(struct drm_gem_object *obj,
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struct vm_area_struct *vma);
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struct rockchip_gem_object *
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rockchip_gem_create_object(struct drm_device *drm, unsigned int size,
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bool alloc_kmap);
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void rockchip_gem_free_object(struct drm_gem_object *obj);
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int rockchip_gem_dumb_create(struct drm_file *file_priv,
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struct drm_device *dev,
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struct drm_mode_create_dumb *args);
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int rockchip_gem_dumb_map_offset(struct drm_file *file_priv,
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struct drm_device *dev, uint32_t handle,
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uint64_t *offset);
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#endif /* _ROCKCHIP_DRM_GEM_H */
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