1 /* SPDX-License-Identifier: MIT */
2 #ifndef __NVKM_FBRAM_FUC_H__
3 #define __NVKM_FBRAM_FUC_H__
4 #include <subdev/fb.h>
5 #include <subdev/pmu.h>
6 
7 struct ramfuc {
8 	struct nvkm_memx *memx;
9 	struct nvkm_fb *fb;
10 	int sequence;
11 };
12 
13 struct ramfuc_reg {
14 	int sequence;
15 	bool force;
16 	u32 addr;
17 	u32 stride; /* in bytes */
18 	u32 mask;
19 	u32 data;
20 };
21 
22 static inline struct ramfuc_reg
23 ramfuc_stride(u32 addr, u32 stride, u32 mask)
24 {
25 	return (struct ramfuc_reg) {
26 		.sequence = 0,
27 		.addr = addr,
28 		.stride = stride,
29 		.mask = mask,
30 		.data = 0xdeadbeef,
31 	};
32 }
33 
34 static inline struct ramfuc_reg
35 ramfuc_reg2(u32 addr1, u32 addr2)
36 {
37 	return (struct ramfuc_reg) {
38 		.sequence = 0,
39 		.addr = addr1,
40 		.stride = addr2 - addr1,
41 		.mask = 0x3,
42 		.data = 0xdeadbeef,
43 	};
44 }
45 
46 static noinline struct ramfuc_reg
47 ramfuc_reg(u32 addr)
48 {
49 	return (struct ramfuc_reg) {
50 		.sequence = 0,
51 		.addr = addr,
52 		.stride = 0,
53 		.mask = 0x1,
54 		.data = 0xdeadbeef,
55 	};
56 }
57 
58 static inline int
59 ramfuc_init(struct ramfuc *ram, struct nvkm_fb *fb)
60 {
61 	int ret = nvkm_memx_init(fb->subdev.device->pmu, &ram->memx);
62 	if (ret)
63 		return ret;
64 
65 	ram->sequence++;
66 	ram->fb = fb;
67 	return 0;
68 }
69 
70 static inline int
71 ramfuc_exec(struct ramfuc *ram, bool exec)
72 {
73 	int ret = 0;
74 	if (ram->fb) {
75 		ret = nvkm_memx_fini(&ram->memx, exec);
76 		ram->fb = NULL;
77 	}
78 	return ret;
79 }
80 
81 static inline u32
82 ramfuc_rd32(struct ramfuc *ram, struct ramfuc_reg *reg)
83 {
84 	struct nvkm_device *device = ram->fb->subdev.device;
85 	if (reg->sequence != ram->sequence)
86 		reg->data = nvkm_rd32(device, reg->addr);
87 	return reg->data;
88 }
89 
90 static inline void
91 ramfuc_wr32(struct ramfuc *ram, struct ramfuc_reg *reg, u32 data)
92 {
93 	unsigned int mask, off = 0;
94 
95 	reg->sequence = ram->sequence;
96 	reg->data = data;
97 
98 	for (mask = reg->mask; mask > 0; mask = (mask & ~1) >> 1) {
99 		if (mask & 1)
100 			nvkm_memx_wr32(ram->memx, reg->addr+off, reg->data);
101 		off += reg->stride;
102 	}
103 }
104 
105 static inline void
106 ramfuc_nuke(struct ramfuc *ram, struct ramfuc_reg *reg)
107 {
108 	reg->force = true;
109 }
110 
111 static inline u32
112 ramfuc_mask(struct ramfuc *ram, struct ramfuc_reg *reg, u32 mask, u32 data)
113 {
114 	u32 temp = ramfuc_rd32(ram, reg);
115 	if (temp != ((temp & ~mask) | data) || reg->force) {
116 		ramfuc_wr32(ram, reg, (temp & ~mask) | data);
117 		reg->force = false;
118 	}
119 	return temp;
120 }
121 
122 static inline void
123 ramfuc_wait(struct ramfuc *ram, u32 addr, u32 mask, u32 data, u32 nsec)
124 {
125 	nvkm_memx_wait(ram->memx, addr, mask, data, nsec);
126 }
127 
128 static inline void
129 ramfuc_nsec(struct ramfuc *ram, u32 nsec)
130 {
131 	nvkm_memx_nsec(ram->memx, nsec);
132 }
133 
134 static inline void
135 ramfuc_wait_vblank(struct ramfuc *ram)
136 {
137 	nvkm_memx_wait_vblank(ram->memx);
138 }
139 
140 static inline void
141 ramfuc_train(struct ramfuc *ram)
142 {
143 	nvkm_memx_train(ram->memx);
144 }
145 
146 static inline int
147 ramfuc_train_result(struct nvkm_fb *fb, u32 *result, u32 rsize)
148 {
149 	return nvkm_memx_train_result(fb->subdev.device->pmu, result, rsize);
150 }
151 
152 static inline void
153 ramfuc_block(struct ramfuc *ram)
154 {
155 	nvkm_memx_block(ram->memx);
156 }
157 
158 static inline void
159 ramfuc_unblock(struct ramfuc *ram)
160 {
161 	nvkm_memx_unblock(ram->memx);
162 }
163 
164 #define ram_init(s,p)        ramfuc_init(&(s)->base, (p))
165 #define ram_exec(s,e)        ramfuc_exec(&(s)->base, (e))
166 #define ram_have(s,r)        ((s)->r_##r.addr != 0x000000)
167 #define ram_rd32(s,r)        ramfuc_rd32(&(s)->base, &(s)->r_##r)
168 #define ram_wr32(s,r,d)      ramfuc_wr32(&(s)->base, &(s)->r_##r, (d))
169 #define ram_nuke(s,r)        ramfuc_nuke(&(s)->base, &(s)->r_##r)
170 #define ram_mask(s,r,m,d)    ramfuc_mask(&(s)->base, &(s)->r_##r, (m), (d))
171 #define ram_wait(s,r,m,d,n)  ramfuc_wait(&(s)->base, (r), (m), (d), (n))
172 #define ram_nsec(s,n)        ramfuc_nsec(&(s)->base, (n))
173 #define ram_wait_vblank(s)   ramfuc_wait_vblank(&(s)->base)
174 #define ram_train(s)         ramfuc_train(&(s)->base)
175 #define ram_train_result(s,r,l) ramfuc_train_result((s), (r), (l))
176 #define ram_block(s)         ramfuc_block(&(s)->base)
177 #define ram_unblock(s)       ramfuc_unblock(&(s)->base)
178 #endif
179