b88baab828
This commit provides the implementation for the new uapi motivated by the Vulkan API. It allows user mode drivers (UMDs) to: 1) Initialize a GPU virtual address (VA) space via the new DRM_IOCTL_NOUVEAU_VM_INIT ioctl for UMDs to specify the portion of VA space managed by the kernel and userspace, respectively. 2) Allocate and free a VA space region as well as bind and unbind memory to the GPUs VA space via the new DRM_IOCTL_NOUVEAU_VM_BIND ioctl. UMDs can request the named operations to be processed either synchronously or asynchronously. It supports DRM syncobjs (incl. timelines) as synchronization mechanism. The management of the GPU VA mappings is implemented with the DRM GPU VA manager. 3) Execute push buffers with the new DRM_IOCTL_NOUVEAU_EXEC ioctl. The execution happens asynchronously. It supports DRM syncobj (incl. timelines) as synchronization mechanism. DRM GEM object locking is handled with drm_exec. Both, DRM_IOCTL_NOUVEAU_VM_BIND and DRM_IOCTL_NOUVEAU_EXEC, use the DRM GPU scheduler for the asynchronous paths. Reviewed-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Danilo Krummrich <dakr@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230804182406.5222-12-dakr@redhat.com
116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
/*
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* Copyright 2011 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Dave Airlie
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*/
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#include <linux/dma-buf.h>
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#include <drm/ttm/ttm_tt.h>
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#include "nouveau_drv.h"
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#include "nouveau_gem.h"
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struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *obj)
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{
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struct nouveau_bo *nvbo = nouveau_gem_object(obj);
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return drm_prime_pages_to_sg(obj->dev, nvbo->bo.ttm->pages,
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nvbo->bo.ttm->num_pages);
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}
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struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev,
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struct dma_buf_attachment *attach,
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struct sg_table *sg)
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{
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struct nouveau_drm *drm = nouveau_drm(dev);
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struct drm_gem_object *obj;
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struct nouveau_bo *nvbo;
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struct dma_resv *robj = attach->dmabuf->resv;
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u64 size = attach->dmabuf->size;
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int align = 0;
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int ret;
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dma_resv_lock(robj, NULL);
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nvbo = nouveau_bo_alloc(&drm->client, &size, &align,
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NOUVEAU_GEM_DOMAIN_GART, 0, 0, true);
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if (IS_ERR(nvbo)) {
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obj = ERR_CAST(nvbo);
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goto unlock;
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}
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nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART;
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nvbo->bo.base.funcs = &nouveau_gem_object_funcs;
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/* Initialize the embedded gem-object. We return a single gem-reference
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* to the caller, instead of a normal nouveau_bo ttm reference. */
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ret = drm_gem_object_init(dev, &nvbo->bo.base, size);
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if (ret) {
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nouveau_bo_ref(NULL, &nvbo);
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obj = ERR_PTR(-ENOMEM);
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goto unlock;
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}
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ret = nouveau_bo_init(nvbo, size, align, NOUVEAU_GEM_DOMAIN_GART,
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sg, robj);
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if (ret) {
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obj = ERR_PTR(ret);
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goto unlock;
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}
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obj = &nvbo->bo.base;
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unlock:
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dma_resv_unlock(robj);
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return obj;
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}
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int nouveau_gem_prime_pin(struct drm_gem_object *obj)
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{
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struct nouveau_bo *nvbo = nouveau_gem_object(obj);
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int ret;
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/* pin buffer into GTT */
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ret = nouveau_bo_pin(nvbo, NOUVEAU_GEM_DOMAIN_GART, false);
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if (ret)
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return -EINVAL;
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return 0;
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}
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void nouveau_gem_prime_unpin(struct drm_gem_object *obj)
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{
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struct nouveau_bo *nvbo = nouveau_gem_object(obj);
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nouveau_bo_unpin(nvbo);
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}
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struct dma_buf *nouveau_gem_prime_export(struct drm_gem_object *gobj,
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int flags)
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{
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struct nouveau_bo *nvbo = nouveau_gem_object(gobj);
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if (nvbo->no_share)
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return ERR_PTR(-EPERM);
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return drm_gem_prime_export(gobj, flags);
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}
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