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 lima_vm_get(struct lima_vm * vm)49 static inline struct lima_vm *lima_vm_get(struct lima_vm *vm) 50 { 51 kref_get(&vm->refcount); 52 return vm; 53 } 54 lima_vm_put(struct lima_vm * vm)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 65