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https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/
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b58e12a66e
Buffers that are not shared between contexts can share a single resv object. This way drm_gpuvm will not track them as external objects, and submit-time validating overhead will be O(1) for all N non-shared BOs, instead of O(n). Signed-off-by: Rob Clark <robdclark@chromium.org> Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com> Tested-by: Antonino Maniscalco <antomani103@gmail.com> Reviewed-by: Antonino Maniscalco <antomani103@gmail.com> Patchwork: https://patchwork.freedesktop.org/patch/661497/
85 lines
1.7 KiB
C
85 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2013 Red Hat
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* Author: Rob Clark <robdclark@gmail.com>
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*/
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#include <linux/dma-buf.h>
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#include <drm/drm_prime.h>
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#include "msm_drv.h"
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#include "msm_gem.h"
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struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj)
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{
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struct msm_gem_object *msm_obj = to_msm_bo(obj);
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int npages = obj->size >> PAGE_SHIFT;
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if (msm_obj->flags & MSM_BO_NO_SHARE)
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return ERR_PTR(-EINVAL);
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if (WARN_ON(!msm_obj->pages)) /* should have already pinned! */
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return ERR_PTR(-ENOMEM);
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return drm_prime_pages_to_sg(obj->dev, msm_obj->pages, npages);
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}
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int msm_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map)
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{
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void *vaddr;
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vaddr = msm_gem_get_vaddr_locked(obj);
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if (IS_ERR(vaddr))
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return PTR_ERR(vaddr);
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iosys_map_set_vaddr(map, vaddr);
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return 0;
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}
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void msm_gem_prime_vunmap(struct drm_gem_object *obj, struct iosys_map *map)
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{
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msm_gem_put_vaddr_locked(obj);
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}
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struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
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struct dma_buf_attachment *attach, struct sg_table *sg)
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{
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return msm_gem_import(dev, attach->dmabuf, sg);
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}
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struct dma_buf *msm_gem_prime_export(struct drm_gem_object *obj, int flags)
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{
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if (to_msm_bo(obj)->flags & MSM_BO_NO_SHARE)
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return ERR_PTR(-EPERM);
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return drm_gem_prime_export(obj, flags);
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}
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int msm_gem_prime_pin(struct drm_gem_object *obj)
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{
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struct page **pages;
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int ret = 0;
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if (drm_gem_is_imported(obj))
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return 0;
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if (to_msm_bo(obj)->flags & MSM_BO_NO_SHARE)
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return -EINVAL;
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pages = msm_gem_pin_pages_locked(obj);
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if (IS_ERR(pages))
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ret = PTR_ERR(pages);
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return ret;
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}
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void msm_gem_prime_unpin(struct drm_gem_object *obj)
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{
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if (drm_gem_is_imported(obj))
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return;
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msm_gem_unpin_pages_locked(obj);
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}
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