drivers/gpu/drm/lima/lima_vm.h

   1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
   2 /* Copyright 2017-2019 Qiang Yu <yuq825@gmail.com> */
   3
   4 #ifndef __LIMA_VM_H__
   5 #define __LIMA_VM_H__
   6
   7 #include <drm/drm_mm.h>
   8 #include <linux/kref.h>
   9
  10 #define LIMA_PAGE_SIZE    4096
  11 #define LIMA_PAGE_MASK    (LIMA_PAGE_SIZE - 1)
  12 #define LIMA_PAGE_ENT_NUM (LIMA_PAGE_SIZE / sizeof(u32))
  13
  14 #define LIMA_VM_NUM_PT_PER_BT_SHIFT 3
  15 #define LIMA_VM_NUM_PT_PER_BT (1 << LIMA_VM_NUM_PT_PER_BT_SHIFT)
  16 #define LIMA_VM_NUM_BT (LIMA_PAGE_ENT_NUM >> LIMA_VM_NUM_PT_PER_BT_SHIFT)
  17
  18 #define LIMA_VA_RESERVE_START  0x0FFF00000ULL
  19 #define LIMA_VA_RESERVE_DLBU   LIMA_VA_RESERVE_START
  20 #define LIMA_VA_RESERVE_END    0x100000000ULL
  21
  22 struct lima_device;
  23
  24 struct lima_vm_page {
  25         u32 *cpu;
  26         dma_addr_t dma;
  27 };
  28
  29 struct lima_vm {
  30         struct mutex lock;
  31         struct kref refcount;
  32
  33         struct drm_mm mm;
  34
  35         struct lima_device *dev;
  36
  37         struct lima_vm_page pd;
  38         struct lima_vm_page bts[LIMA_VM_NUM_BT];
  39 };
  40
  41 int lima_vm_bo_add(struct lima_vm *vm, struct lima_bo *bo, bool create);
  42 void lima_vm_bo_del(struct lima_vm *vm, struct lima_bo *bo);
  43
  44 u32 lima_vm_get_va(struct lima_vm *vm, struct lima_bo *bo);
  45
  46 struct lima_vm *lima_vm_create(struct lima_device *dev);
  47 void lima_vm_release(struct kref *kref);
  48
  49 static inline struct lima_vm *lima_vm_get(struct lima_vm *vm)
  50 {
  51         kref_get(&vm->refcount);
  52         return vm;
  53 }
  54
  55 static inline void lima_vm_put(struct lima_vm *vm)
  56 {
  57         if (vm)
  58                 kref_put(&vm->refcount, lima_vm_release);
  59 }
  60
  61 void lima_vm_print(struct lima_vm *vm);
  62 int lima_vm_map_bo(struct lima_vm *vm, struct lima_bo *bo, int pageoff);
  63
  64 #endif