1 /*
2  * Copyright 2012 Red Hat Inc.
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  * Authors: Ben Skeggs
23  */
24 #include "nv50.h"
25 
26 #include <core/gpuobj.h>
27 #include <subdev/fb.h>
28 #include <subdev/mmu.h>
29 #include <subdev/timer.h>
30 
31 static void
32 nv50_bar_flush(struct nvkm_bar *base)
33 {
34 	struct nv50_bar *bar = nv50_bar(base);
35 	struct nvkm_device *device = bar->base.subdev.device;
36 	unsigned long flags;
37 	spin_lock_irqsave(&bar->base.lock, flags);
38 	nvkm_wr32(device, 0x00330c, 0x00000001);
39 	nvkm_msec(device, 2000,
40 		if (!(nvkm_rd32(device, 0x00330c) & 0x00000002))
41 			break;
42 	);
43 	spin_unlock_irqrestore(&bar->base.lock, flags);
44 }
45 
46 struct nvkm_vmm *
47 nv50_bar_bar1_vmm(struct nvkm_bar *base)
48 {
49 	return nv50_bar(base)->bar1_vmm;
50 }
51 
52 void
53 nv50_bar_bar1_wait(struct nvkm_bar *base)
54 {
55 	nvkm_bar_flush(base);
56 }
57 
58 void
59 nv50_bar_bar1_fini(struct nvkm_bar *bar)
60 {
61 	nvkm_wr32(bar->subdev.device, 0x001708, 0x00000000);
62 }
63 
64 void
65 nv50_bar_bar1_init(struct nvkm_bar *base)
66 {
67 	struct nvkm_device *device = base->subdev.device;
68 	struct nv50_bar *bar = nv50_bar(base);
69 	nvkm_wr32(device, 0x001708, 0x80000000 | bar->bar1->node->offset >> 4);
70 }
71 
72 struct nvkm_vmm *
73 nv50_bar_bar2_vmm(struct nvkm_bar *base)
74 {
75 	return nv50_bar(base)->bar2_vmm;
76 }
77 
78 void
79 nv50_bar_bar2_fini(struct nvkm_bar *bar)
80 {
81 	nvkm_wr32(bar->subdev.device, 0x00170c, 0x00000000);
82 }
83 
84 void
85 nv50_bar_bar2_init(struct nvkm_bar *base)
86 {
87 	struct nvkm_device *device = base->subdev.device;
88 	struct nv50_bar *bar = nv50_bar(base);
89 	nvkm_wr32(device, 0x001704, 0x00000000 | bar->mem->addr >> 12);
90 	nvkm_wr32(device, 0x001704, 0x40000000 | bar->mem->addr >> 12);
91 	nvkm_wr32(device, 0x00170c, 0x80000000 | bar->bar2->node->offset >> 4);
92 }
93 
94 void
95 nv50_bar_init(struct nvkm_bar *base)
96 {
97 	struct nv50_bar *bar = nv50_bar(base);
98 	struct nvkm_device *device = bar->base.subdev.device;
99 	int i;
100 
101 	for (i = 0; i < 8; i++)
102 		nvkm_wr32(device, 0x001900 + (i * 4), 0x00000000);
103 }
104 
105 int
106 nv50_bar_oneinit(struct nvkm_bar *base)
107 {
108 	struct nv50_bar *bar = nv50_bar(base);
109 	struct nvkm_device *device = bar->base.subdev.device;
110 	static struct lock_class_key bar1_lock;
111 	static struct lock_class_key bar2_lock;
112 	u64 start, limit, size;
113 	int ret;
114 
115 	ret = nvkm_gpuobj_new(device, 0x20000, 0, false, NULL, &bar->mem);
116 	if (ret)
117 		return ret;
118 
119 	ret = nvkm_gpuobj_new(device, bar->pgd_addr, 0, false, bar->mem,
120 			      &bar->pad);
121 	if (ret)
122 		return ret;
123 
124 	ret = nvkm_gpuobj_new(device, 0x4000, 0, false, bar->mem, &bar->pgd);
125 	if (ret)
126 		return ret;
127 
128 	/* BAR2 */
129 	start = 0x0100000000ULL;
130 	size = device->func->resource_size(device, 3);
131 	if (!size)
132 		return -ENOMEM;
133 	limit = start + size;
134 
135 	ret = nvkm_vmm_new(device, start, limit-- - start, NULL, 0,
136 			   &bar2_lock, "bar2", &bar->bar2_vmm);
137 	if (ret)
138 		return ret;
139 
140 	atomic_inc(&bar->bar2_vmm->engref[NVKM_SUBDEV_BAR]);
141 	bar->bar2_vmm->debug = bar->base.subdev.debug;
142 
143 	ret = nvkm_vmm_boot(bar->bar2_vmm);
144 	if (ret)
145 		return ret;
146 
147 	ret = nvkm_vmm_join(bar->bar2_vmm, bar->mem->memory);
148 	if (ret)
149 		return ret;
150 
151 	ret = nvkm_gpuobj_new(device, 24, 16, false, bar->mem, &bar->bar2);
152 	if (ret)
153 		return ret;
154 
155 	nvkm_kmap(bar->bar2);
156 	nvkm_wo32(bar->bar2, 0x00, 0x7fc00000);
157 	nvkm_wo32(bar->bar2, 0x04, lower_32_bits(limit));
158 	nvkm_wo32(bar->bar2, 0x08, lower_32_bits(start));
159 	nvkm_wo32(bar->bar2, 0x0c, upper_32_bits(limit) << 24 |
160 				   upper_32_bits(start));
161 	nvkm_wo32(bar->bar2, 0x10, 0x00000000);
162 	nvkm_wo32(bar->bar2, 0x14, 0x00000000);
163 	nvkm_done(bar->bar2);
164 
165 	bar->base.subdev.oneinit = true;
166 	nvkm_bar_bar2_init(device);
167 
168 	/* BAR1 */
169 	start = 0x0000000000ULL;
170 	size = device->func->resource_size(device, 1);
171 	if (!size)
172 		return -ENOMEM;
173 	limit = start + size;
174 
175 	ret = nvkm_vmm_new(device, start, limit-- - start, NULL, 0,
176 			   &bar1_lock, "bar1", &bar->bar1_vmm);
177 	if (ret)
178 		return ret;
179 
180 	atomic_inc(&bar->bar1_vmm->engref[NVKM_SUBDEV_BAR]);
181 	bar->bar1_vmm->debug = bar->base.subdev.debug;
182 
183 	ret = nvkm_vmm_join(bar->bar1_vmm, bar->mem->memory);
184 	if (ret)
185 		return ret;
186 
187 	ret = nvkm_gpuobj_new(device, 24, 16, false, bar->mem, &bar->bar1);
188 	if (ret)
189 		return ret;
190 
191 	nvkm_kmap(bar->bar1);
192 	nvkm_wo32(bar->bar1, 0x00, 0x7fc00000);
193 	nvkm_wo32(bar->bar1, 0x04, lower_32_bits(limit));
194 	nvkm_wo32(bar->bar1, 0x08, lower_32_bits(start));
195 	nvkm_wo32(bar->bar1, 0x0c, upper_32_bits(limit) << 24 |
196 				   upper_32_bits(start));
197 	nvkm_wo32(bar->bar1, 0x10, 0x00000000);
198 	nvkm_wo32(bar->bar1, 0x14, 0x00000000);
199 	nvkm_done(bar->bar1);
200 	return 0;
201 }
202 
203 void *
204 nv50_bar_dtor(struct nvkm_bar *base)
205 {
206 	struct nv50_bar *bar = nv50_bar(base);
207 	if (bar->mem) {
208 		nvkm_gpuobj_del(&bar->bar1);
209 		nvkm_vmm_part(bar->bar1_vmm, bar->mem->memory);
210 		nvkm_vmm_unref(&bar->bar1_vmm);
211 		nvkm_gpuobj_del(&bar->bar2);
212 		nvkm_vmm_part(bar->bar2_vmm, bar->mem->memory);
213 		nvkm_vmm_unref(&bar->bar2_vmm);
214 		nvkm_gpuobj_del(&bar->pgd);
215 		nvkm_gpuobj_del(&bar->pad);
216 		nvkm_gpuobj_del(&bar->mem);
217 	}
218 	return bar;
219 }
220 
221 int
222 nv50_bar_new_(const struct nvkm_bar_func *func, struct nvkm_device *device,
223 	      enum nvkm_subdev_type type, int inst, u32 pgd_addr, struct nvkm_bar **pbar)
224 {
225 	struct nv50_bar *bar;
226 	if (!(bar = kzalloc(sizeof(*bar), GFP_KERNEL)))
227 		return -ENOMEM;
228 	nvkm_bar_ctor(func, device, type, inst, &bar->base);
229 	bar->pgd_addr = pgd_addr;
230 	*pbar = &bar->base;
231 	return 0;
232 }
233 
234 static const struct nvkm_bar_func
235 nv50_bar_func = {
236 	.dtor = nv50_bar_dtor,
237 	.oneinit = nv50_bar_oneinit,
238 	.init = nv50_bar_init,
239 	.bar1.init = nv50_bar_bar1_init,
240 	.bar1.fini = nv50_bar_bar1_fini,
241 	.bar1.wait = nv50_bar_bar1_wait,
242 	.bar1.vmm = nv50_bar_bar1_vmm,
243 	.bar2.init = nv50_bar_bar2_init,
244 	.bar2.fini = nv50_bar_bar2_fini,
245 	.bar2.wait = nv50_bar_bar1_wait,
246 	.bar2.vmm = nv50_bar_bar2_vmm,
247 	.flush = nv50_bar_flush,
248 };
249 
250 int
251 nv50_bar_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
252 	     struct nvkm_bar **pbar)
253 {
254 	return nv50_bar_new_(&nv50_bar_func, device, type, inst, 0x1400, pbar);
255 }
256