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e3d8b08904
When memory is migrated to the GPU, it is likely to be accessed by GPU code soon afterwards. Instead of waiting for a GPU fault, map the migrated memory into the GPU page tables with the same access permissions as the source CPU page table entries. This preserves copy on write semantics. Signed-off-by: Ralph Campbell <rcampbell@nvidia.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Jason Gunthorpe <jgg@mellanox.com> Cc: "Jérôme Glisse" <jglisse@redhat.com> Cc: Ben Skeggs <bskeggs@redhat.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
#ifndef __NOUVEAU_SVM_H__
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#define __NOUVEAU_SVM_H__
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#include <nvif/os.h>
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struct drm_device;
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struct drm_file;
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struct nouveau_drm;
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struct nouveau_svmm;
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#if IS_ENABLED(CONFIG_DRM_NOUVEAU_SVM)
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void nouveau_svm_init(struct nouveau_drm *);
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void nouveau_svm_fini(struct nouveau_drm *);
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void nouveau_svm_suspend(struct nouveau_drm *);
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void nouveau_svm_resume(struct nouveau_drm *);
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int nouveau_svmm_init(struct drm_device *, void *, struct drm_file *);
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void nouveau_svmm_fini(struct nouveau_svmm **);
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int nouveau_svmm_join(struct nouveau_svmm *, u64 inst);
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void nouveau_svmm_part(struct nouveau_svmm *, u64 inst);
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int nouveau_svmm_bind(struct drm_device *, void *, struct drm_file *);
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u64 *nouveau_pfns_alloc(unsigned long npages);
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void nouveau_pfns_free(u64 *pfns);
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void nouveau_pfns_map(struct nouveau_svmm *svmm, struct mm_struct *mm,
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unsigned long addr, u64 *pfns, unsigned long npages);
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#else /* IS_ENABLED(CONFIG_DRM_NOUVEAU_SVM) */
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static inline void nouveau_svm_init(struct nouveau_drm *drm) {}
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static inline void nouveau_svm_fini(struct nouveau_drm *drm) {}
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static inline void nouveau_svm_suspend(struct nouveau_drm *drm) {}
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static inline void nouveau_svm_resume(struct nouveau_drm *drm) {}
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static inline int nouveau_svmm_init(struct drm_device *device, void *p,
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struct drm_file *file)
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{
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return -ENOSYS;
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}
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static inline void nouveau_svmm_fini(struct nouveau_svmm **svmmp) {}
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static inline int nouveau_svmm_join(struct nouveau_svmm *svmm, u64 inst)
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{
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return 0;
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}
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static inline void nouveau_svmm_part(struct nouveau_svmm *svmm, u64 inst) {}
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static inline int nouveau_svmm_bind(struct drm_device *device, void *p,
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struct drm_file *file)
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{
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return -ENOSYS;
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}
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#endif /* IS_ENABLED(CONFIG_DRM_NOUVEAU_SVM) */
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#endif
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