1 /*
2  * Copyright 2013 Ilia Mirkin
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  */
22 #include <engine/xtensa.h>
23 
24 #include <core/gpuobj.h>
25 #include <engine/fifo.h>
26 
27 static int
28 nvkm_xtensa_oclass_get(struct nvkm_oclass *oclass, int index)
29 {
30 	struct nvkm_xtensa *xtensa = nvkm_xtensa(oclass->engine);
31 	int c = 0;
32 
33 	while (xtensa->func->sclass[c].oclass) {
34 		if (c++ == index) {
35 			oclass->base = xtensa->func->sclass[index];
36 			return index;
37 		}
38 	}
39 
40 	return c;
41 }
42 
43 static int
44 nvkm_xtensa_cclass_bind(struct nvkm_object *object, struct nvkm_gpuobj *parent,
45 			int align, struct nvkm_gpuobj **pgpuobj)
46 {
47 	return nvkm_gpuobj_new(object->engine->subdev.device, 0x10000, align,
48 			       true, parent, pgpuobj);
49 }
50 
51 static const struct nvkm_object_func
52 nvkm_xtensa_cclass = {
53 	.bind = nvkm_xtensa_cclass_bind,
54 };
55 
56 static void
57 nvkm_xtensa_intr(struct nvkm_engine *engine)
58 {
59 	struct nvkm_xtensa *xtensa = nvkm_xtensa(engine);
60 	struct nvkm_subdev *subdev = &xtensa->engine.subdev;
61 	struct nvkm_device *device = subdev->device;
62 	const u32 base = xtensa->addr;
63 	u32 unk104 = nvkm_rd32(device, base + 0xd04);
64 	u32 intr = nvkm_rd32(device, base + 0xc20);
65 	u32 chan = nvkm_rd32(device, base + 0xc28);
66 	u32 unk10c = nvkm_rd32(device, base + 0xd0c);
67 
68 	if (intr & 0x10)
69 		nvkm_warn(subdev, "Watchdog interrupt, engine hung.\n");
70 	nvkm_wr32(device, base + 0xc20, intr);
71 	intr = nvkm_rd32(device, base + 0xc20);
72 	if (unk104 == 0x10001 && unk10c == 0x200 && chan && !intr) {
73 		nvkm_debug(subdev, "Enabling FIFO_CTRL\n");
74 		nvkm_mask(device, xtensa->addr + 0xd94, 0, xtensa->func->fifo_val);
75 	}
76 }
77 
78 static int
79 nvkm_xtensa_fini(struct nvkm_engine *engine, bool suspend)
80 {
81 	struct nvkm_xtensa *xtensa = nvkm_xtensa(engine);
82 	struct nvkm_device *device = xtensa->engine.subdev.device;
83 	const u32 base = xtensa->addr;
84 
85 	nvkm_wr32(device, base + 0xd84, 0); /* INTR_EN */
86 	nvkm_wr32(device, base + 0xd94, 0); /* FIFO_CTRL */
87 
88 	if (!suspend)
89 		nvkm_memory_unref(&xtensa->gpu_fw);
90 	return 0;
91 }
92 
93 static int
94 nvkm_xtensa_init(struct nvkm_engine *engine)
95 {
96 	struct nvkm_xtensa *xtensa = nvkm_xtensa(engine);
97 	struct nvkm_subdev *subdev = &xtensa->engine.subdev;
98 	struct nvkm_device *device = subdev->device;
99 	const u32 base = xtensa->addr;
100 	const struct firmware *fw;
101 	char name[32];
102 	int i, ret;
103 	u64 addr, size;
104 	u32 tmp;
105 
106 	if (!xtensa->gpu_fw) {
107 		snprintf(name, sizeof(name), "nouveau/nv84_xuc%03x",
108 			 xtensa->addr >> 12);
109 
110 		ret = request_firmware(&fw, name, device->dev);
111 		if (ret) {
112 			nvkm_warn(subdev, "unable to load firmware %s\n", name);
113 			return ret;
114 		}
115 
116 		if (fw->size > 0x40000) {
117 			nvkm_warn(subdev, "firmware %s too large\n", name);
118 			release_firmware(fw);
119 			return -EINVAL;
120 		}
121 
122 		ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST,
123 				      0x40000, 0x1000, false,
124 				      &xtensa->gpu_fw);
125 		if (ret) {
126 			release_firmware(fw);
127 			return ret;
128 		}
129 
130 		nvkm_kmap(xtensa->gpu_fw);
131 		for (i = 0; i < fw->size / 4; i++)
132 			nvkm_wo32(xtensa->gpu_fw, i * 4, *((u32 *)fw->data + i));
133 		nvkm_done(xtensa->gpu_fw);
134 		release_firmware(fw);
135 	}
136 
137 	addr = nvkm_memory_addr(xtensa->gpu_fw);
138 	size = nvkm_memory_size(xtensa->gpu_fw);
139 
140 	nvkm_wr32(device, base + 0xd10, 0x1fffffff); /* ?? */
141 	nvkm_wr32(device, base + 0xd08, 0x0fffffff); /* ?? */
142 
143 	nvkm_wr32(device, base + 0xd28, xtensa->func->unkd28); /* ?? */
144 	nvkm_wr32(device, base + 0xc20, 0x3f); /* INTR */
145 	nvkm_wr32(device, base + 0xd84, 0x3f); /* INTR_EN */
146 
147 	nvkm_wr32(device, base + 0xcc0, addr >> 8); /* XT_REGION_BASE */
148 	nvkm_wr32(device, base + 0xcc4, 0x1c); /* XT_REGION_SETUP */
149 	nvkm_wr32(device, base + 0xcc8, size >> 8); /* XT_REGION_LIMIT */
150 
151 	tmp = nvkm_rd32(device, 0x0);
152 	nvkm_wr32(device, base + 0xde0, tmp); /* SCRATCH_H2X */
153 
154 	nvkm_wr32(device, base + 0xce8, 0xf); /* XT_REGION_SETUP */
155 
156 	nvkm_wr32(device, base + 0xc20, 0x3f); /* INTR */
157 	nvkm_wr32(device, base + 0xd84, 0x3f); /* INTR_EN */
158 	return 0;
159 }
160 
161 static void *
162 nvkm_xtensa_dtor(struct nvkm_engine *engine)
163 {
164 	return nvkm_xtensa(engine);
165 }
166 
167 static const struct nvkm_engine_func
168 nvkm_xtensa = {
169 	.dtor = nvkm_xtensa_dtor,
170 	.init = nvkm_xtensa_init,
171 	.fini = nvkm_xtensa_fini,
172 	.intr = nvkm_xtensa_intr,
173 	.fifo.sclass = nvkm_xtensa_oclass_get,
174 	.cclass = &nvkm_xtensa_cclass,
175 };
176 
177 int
178 nvkm_xtensa_new_(const struct nvkm_xtensa_func *func,
179 		 struct nvkm_device *device, int index, bool enable,
180 		 u32 addr, struct nvkm_engine **pengine)
181 {
182 	struct nvkm_xtensa *xtensa;
183 
184 	if (!(xtensa = kzalloc(sizeof(*xtensa), GFP_KERNEL)))
185 		return -ENOMEM;
186 	xtensa->func = func;
187 	xtensa->addr = addr;
188 	*pengine = &xtensa->engine;
189 
190 	return nvkm_engine_ctor(&nvkm_xtensa, device, index,
191 				enable, &xtensa->engine);
192 }
193