LXR linux/drivers/gpu/drm/lima/lima

   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
  22struct lima_device;
  23
  24struct lima_vm_page {
  25        u32 *cpu;
  26        dma_addr_t dma;
  27};
  28
  29struct 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
  41int lima_vm_bo_add(struct lima_vm *vm, struct lima_bo *bo, bool create);
  42void lima_vm_bo_del(struct lima_vm *vm, struct lima_bo *bo);
  43
  44u32 lima_vm_get_va(struct lima_vm *vm, struct lima_bo *bo);
  45
  46struct lima_vm *lima_vm_create(struct lima_device *dev);
  47void lima_vm_release(struct kref *kref);
  48
  49static inline struct lima_vm *lima_vm_get(struct lima_vm *vm)
  50{
  51        kref_get(&vm->refcount);
  52        return vm;
  53}
  54
  55static inline void lima_vm_put(struct lima_vm *vm)
  56{
  57        if (vm)
  58                kref_put(&vm->refcount, lima_vm_release);
  59}
  60
  61void lima_vm_print(struct lima_vm *vm);
  62int lima_vm_map_bo(struct lima_vm *vm, struct lima_bo *bo, int pageoff);
  63
  64#endif
  65