drivers/gpu/drm/nouveau/include/nvkm/subdev/mmu.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __NVKM_MMU_H__
   3 #define __NVKM_MMU_H__
   4 #include <core/subdev.h>
   5 #include <core/mm.h>
   6 struct nvkm_device;
   7 struct nvkm_mem;
   8
   9 struct nvkm_vm_pgt {
  10         struct nvkm_memory *mem[2];
  11         u32 refcount[2];
  12 };
  13
  14 struct nvkm_vm_pgd {
  15         struct list_head head;
  16         struct nvkm_gpuobj *obj;
  17 };
  18
  19 struct nvkm_vma {
  20         struct list_head head;
  21         int refcount;
  22         struct nvkm_vm *vm;
  23         struct nvkm_mm_node *node;
  24         u64 offset;
  25         u32 access;
  26 };
  27
  28 struct nvkm_vm {
  29         struct nvkm_mmu *mmu;
  30
  31         struct mutex mutex;
  32         struct nvkm_mm mm;
  33         struct kref refcount;
  34
  35         struct list_head pgd_list;
  36         atomic_t engref[NVKM_SUBDEV_NR];
  37
  38         struct nvkm_vm_pgt *pgt;
  39         u32 fpde;
  40         u32 lpde;
  41 };
  42
  43 int  nvkm_vm_new(struct nvkm_device *, u64 offset, u64 length, u64 mm_offset,
  44                  struct lock_class_key *, struct nvkm_vm **);
  45 int  nvkm_vm_ref(struct nvkm_vm *, struct nvkm_vm **, struct nvkm_gpuobj *pgd);
  46 int  nvkm_vm_boot(struct nvkm_vm *, u64 size);
  47 int  nvkm_vm_get(struct nvkm_vm *, u64 size, u32 page_shift, u32 access,
  48                  struct nvkm_vma *);
  49 void nvkm_vm_put(struct nvkm_vma *);
  50 void nvkm_vm_map(struct nvkm_vma *, struct nvkm_mem *);
  51 void nvkm_vm_map_at(struct nvkm_vma *, u64 offset, struct nvkm_mem *);
  52 void nvkm_vm_unmap(struct nvkm_vma *);
  53 void nvkm_vm_unmap_at(struct nvkm_vma *, u64 offset, u64 length);
  54
  55 struct nvkm_mmu {
  56         const struct nvkm_mmu_func *func;
  57         struct nvkm_subdev subdev;
  58
  59         u64 limit;
  60         u8  dma_bits;
  61         u8  lpg_shift;
  62 };
  63
  64 int nv04_mmu_new(struct nvkm_device *, int, struct nvkm_mmu **);
  65 int nv41_mmu_new(struct nvkm_device *, int, struct nvkm_mmu **);
  66 int nv44_mmu_new(struct nvkm_device *, int, struct nvkm_mmu **);
  67 int nv50_mmu_new(struct nvkm_device *, int, struct nvkm_mmu **);
  68 int gf100_mmu_new(struct nvkm_device *, int, struct nvkm_mmu **);
  69 #endif