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/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/* Copyright 2017-2019 Qiang Yu <yuq825@gmail.com> */
#ifndef __LIMA_VM_H__
#define __LIMA_VM_H__
#include <drm/drm_mm.h>
#include <linux/kref.h>
#define LIMA_PAGE_SIZE 4096
#define LIMA_PAGE_MASK (LIMA_PAGE_SIZE - 1)
#define LIMA_PAGE_ENT_NUM (LIMA_PAGE_SIZE / sizeof(u32))
#define LIMA_VM_NUM_PT_PER_BT_SHIFT 3
#define LIMA_VM_NUM_PT_PER_BT (1 << LIMA_VM_NUM_PT_PER_BT_SHIFT)
#define LIMA_VM_NUM_BT (LIMA_PAGE_ENT_NUM >> LIMA_VM_NUM_PT_PER_BT_SHIFT)
#define LIMA_VA_RESERVE_START 0x0FFF00000ULL
#define LIMA_VA_RESERVE_DLBU LIMA_VA_RESERVE_START
#define LIMA_VA_RESERVE_END 0x100000000ULL
struct lima_device;
struct lima_vm_page {
u32 *cpu;
dma_addr_t dma;
};
struct lima_vm {
struct mutex lock;
struct kref refcount;
struct drm_mm mm;
struct lima_device *dev;
struct lima_vm_page pd;
struct lima_vm_page bts[LIMA_VM_NUM_BT];
};
int lima_vm_bo_add(struct lima_vm *vm, struct lima_bo *bo, bool create);
void lima_vm_bo_del(struct lima_vm *vm, struct lima_bo *bo);
u32 lima_vm_get_va(struct lima_vm *vm, struct lima_bo *bo);
struct lima_vm *lima_vm_create(struct lima_device *dev);
void lima_vm_release(struct kref *kref);
static inline struct lima_vm *lima_vm_get(struct lima_vm *vm)
{
kref_get(&vm->refcount);
return vm;
}
static inline void lima_vm_put(struct lima_vm *vm)
{
if (vm)
kref_put(&vm->refcount, lima_vm_release);
}
void lima_vm_print(struct lima_vm *vm);
int lima_vm_map_bo(struct lima_vm *vm, struct lima_bo *bo, int pageoff);
#endif
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