xref: /openbmc/linux/drivers/gpu/drm/lima/lima_vm.h (revision 24943269)
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