linux/drivers/gpu/drm/nouveau/nouveau_svm.h
Ralph Campbell e3d8b08904 drm/nouveau/svm: map pages after migration
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>
2020-05-22 11:13:49 +10:00

54 lines
1.7 KiB
C

#ifndef __NOUVEAU_SVM_H__
#define __NOUVEAU_SVM_H__
#include <nvif/os.h>
struct drm_device;
struct drm_file;
struct nouveau_drm;
struct nouveau_svmm;
#if IS_ENABLED(CONFIG_DRM_NOUVEAU_SVM)
void nouveau_svm_init(struct nouveau_drm *);
void nouveau_svm_fini(struct nouveau_drm *);
void nouveau_svm_suspend(struct nouveau_drm *);
void nouveau_svm_resume(struct nouveau_drm *);
int nouveau_svmm_init(struct drm_device *, void *, struct drm_file *);
void nouveau_svmm_fini(struct nouveau_svmm **);
int nouveau_svmm_join(struct nouveau_svmm *, u64 inst);
void nouveau_svmm_part(struct nouveau_svmm *, u64 inst);
int nouveau_svmm_bind(struct drm_device *, void *, struct drm_file *);
u64 *nouveau_pfns_alloc(unsigned long npages);
void nouveau_pfns_free(u64 *pfns);
void nouveau_pfns_map(struct nouveau_svmm *svmm, struct mm_struct *mm,
unsigned long addr, u64 *pfns, unsigned long npages);
#else /* IS_ENABLED(CONFIG_DRM_NOUVEAU_SVM) */
static inline void nouveau_svm_init(struct nouveau_drm *drm) {}
static inline void nouveau_svm_fini(struct nouveau_drm *drm) {}
static inline void nouveau_svm_suspend(struct nouveau_drm *drm) {}
static inline void nouveau_svm_resume(struct nouveau_drm *drm) {}
static inline int nouveau_svmm_init(struct drm_device *device, void *p,
struct drm_file *file)
{
return -ENOSYS;
}
static inline void nouveau_svmm_fini(struct nouveau_svmm **svmmp) {}
static inline int nouveau_svmm_join(struct nouveau_svmm *svmm, u64 inst)
{
return 0;
}
static inline void nouveau_svmm_part(struct nouveau_svmm *svmm, u64 inst) {}
static inline int nouveau_svmm_bind(struct drm_device *device, void *p,
struct drm_file *file)
{
return -ENOSYS;
}
#endif /* IS_ENABLED(CONFIG_DRM_NOUVEAU_SVM) */
#endif