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 "priv.h"
25
26 #include <subdev/bar.h>
27
28 /******************************************************************************
29 * instmem object base implementation
30 *****************************************************************************/
31 void
nvkm_instobj_load(struct nvkm_instobj * iobj)32 nvkm_instobj_load(struct nvkm_instobj *iobj)
33 {
34 struct nvkm_memory *memory = &iobj->memory;
35 const u64 size = nvkm_memory_size(memory);
36 void __iomem *map;
37 int i;
38
39 if (!(map = nvkm_kmap(memory))) {
40 for (i = 0; i < size; i += 4)
41 nvkm_wo32(memory, i, iobj->suspend[i / 4]);
42 } else {
43 memcpy_toio(map, iobj->suspend, size);
44 }
45 nvkm_done(memory);
46
47 kvfree(iobj->suspend);
48 iobj->suspend = NULL;
49 }
50
51 int
nvkm_instobj_save(struct nvkm_instobj * iobj)52 nvkm_instobj_save(struct nvkm_instobj *iobj)
53 {
54 struct nvkm_memory *memory = &iobj->memory;
55 const u64 size = nvkm_memory_size(memory);
56 void __iomem *map;
57 int i;
58
59 iobj->suspend = kvmalloc(size, GFP_KERNEL);
60 if (!iobj->suspend)
61 return -ENOMEM;
62
63 if (!(map = nvkm_kmap(memory))) {
64 for (i = 0; i < size; i += 4)
65 iobj->suspend[i / 4] = nvkm_ro32(memory, i);
66 } else {
67 memcpy_fromio(iobj->suspend, map, size);
68 }
69 nvkm_done(memory);
70 return 0;
71 }
72
73 void
nvkm_instobj_dtor(struct nvkm_instmem * imem,struct nvkm_instobj * iobj)74 nvkm_instobj_dtor(struct nvkm_instmem *imem, struct nvkm_instobj *iobj)
75 {
76 spin_lock(&imem->lock);
77 list_del(&iobj->head);
78 spin_unlock(&imem->lock);
79 }
80
81 void
nvkm_instobj_ctor(const struct nvkm_memory_func * func,struct nvkm_instmem * imem,struct nvkm_instobj * iobj)82 nvkm_instobj_ctor(const struct nvkm_memory_func *func,
83 struct nvkm_instmem *imem, struct nvkm_instobj *iobj)
84 {
85 nvkm_memory_ctor(func, &iobj->memory);
86 iobj->suspend = NULL;
87 spin_lock(&imem->lock);
88 list_add_tail(&iobj->head, &imem->list);
89 spin_unlock(&imem->lock);
90 }
91
92 int
nvkm_instobj_wrap(struct nvkm_device * device,struct nvkm_memory * memory,struct nvkm_memory ** pmemory)93 nvkm_instobj_wrap(struct nvkm_device *device,
94 struct nvkm_memory *memory, struct nvkm_memory **pmemory)
95 {
96 struct nvkm_instmem *imem = device->imem;
97 int ret;
98
99 if (!imem->func->memory_wrap)
100 return -ENOSYS;
101
102 ret = imem->func->memory_wrap(imem, memory, pmemory);
103 if (ret)
104 return ret;
105
106 container_of(*pmemory, struct nvkm_instobj, memory)->preserve = true;
107 return 0;
108 }
109
110 int
nvkm_instobj_new(struct nvkm_instmem * imem,u32 size,u32 align,bool zero,bool preserve,struct nvkm_memory ** pmemory)111 nvkm_instobj_new(struct nvkm_instmem *imem, u32 size, u32 align, bool zero, bool preserve,
112 struct nvkm_memory **pmemory)
113 {
114 struct nvkm_subdev *subdev = &imem->subdev;
115 struct nvkm_memory *memory = NULL;
116 u32 offset;
117 int ret;
118
119 ret = imem->func->memory_new(imem, size, align, zero, &memory);
120 if (ret) {
121 nvkm_error(subdev, "OOM: %08x %08x %d\n", size, align, ret);
122 goto done;
123 }
124
125 nvkm_trace(subdev, "new %08x %08x %d: %010llx %010llx\n", size, align,
126 zero, nvkm_memory_addr(memory), nvkm_memory_size(memory));
127
128 if (!imem->func->zero && zero) {
129 void __iomem *map = nvkm_kmap(memory);
130 if (unlikely(!map)) {
131 for (offset = 0; offset < size; offset += 4)
132 nvkm_wo32(memory, offset, 0x00000000);
133 } else {
134 memset_io(map, 0x00, size);
135 }
136 nvkm_done(memory);
137 }
138
139 container_of(memory, struct nvkm_instobj, memory)->preserve = preserve;
140 done:
141 if (ret)
142 nvkm_memory_unref(&memory);
143 *pmemory = memory;
144 return ret;
145 }
146
147 /******************************************************************************
148 * instmem subdev base implementation
149 *****************************************************************************/
150
151 u32
nvkm_instmem_rd32(struct nvkm_instmem * imem,u32 addr)152 nvkm_instmem_rd32(struct nvkm_instmem *imem, u32 addr)
153 {
154 return imem->func->rd32(imem, addr);
155 }
156
157 void
nvkm_instmem_wr32(struct nvkm_instmem * imem,u32 addr,u32 data)158 nvkm_instmem_wr32(struct nvkm_instmem *imem, u32 addr, u32 data)
159 {
160 return imem->func->wr32(imem, addr, data);
161 }
162
163 void
nvkm_instmem_boot(struct nvkm_instmem * imem)164 nvkm_instmem_boot(struct nvkm_instmem *imem)
165 {
166 /* Separate bootstrapped objects from normal list, as we need
167 * to make sure they're accessed with the slowpath on suspend
168 * and resume.
169 */
170 struct nvkm_instobj *iobj, *itmp;
171 spin_lock(&imem->lock);
172 list_for_each_entry_safe(iobj, itmp, &imem->list, head) {
173 list_move_tail(&iobj->head, &imem->boot);
174 }
175 spin_unlock(&imem->lock);
176 }
177
178 static int
nvkm_instmem_fini(struct nvkm_subdev * subdev,bool suspend)179 nvkm_instmem_fini(struct nvkm_subdev *subdev, bool suspend)
180 {
181 struct nvkm_instmem *imem = nvkm_instmem(subdev);
182 int ret;
183
184 if (suspend) {
185 ret = imem->func->suspend(imem);
186 if (ret)
187 return ret;
188
189 imem->suspend = true;
190 }
191
192 if (imem->func->fini)
193 imem->func->fini(imem);
194
195 return 0;
196 }
197
198 static int
nvkm_instmem_init(struct nvkm_subdev * subdev)199 nvkm_instmem_init(struct nvkm_subdev *subdev)
200 {
201 struct nvkm_instmem *imem = nvkm_instmem(subdev);
202
203 if (imem->suspend) {
204 if (imem->func->resume)
205 imem->func->resume(imem);
206
207 imem->suspend = false;
208 return 0;
209 }
210
211 nvkm_bar_bar2_init(subdev->device);
212 return 0;
213 }
214
215 static int
nvkm_instmem_oneinit(struct nvkm_subdev * subdev)216 nvkm_instmem_oneinit(struct nvkm_subdev *subdev)
217 {
218 struct nvkm_instmem *imem = nvkm_instmem(subdev);
219 if (imem->func->oneinit)
220 return imem->func->oneinit(imem);
221 return 0;
222 }
223
224 static void *
nvkm_instmem_dtor(struct nvkm_subdev * subdev)225 nvkm_instmem_dtor(struct nvkm_subdev *subdev)
226 {
227 struct nvkm_instmem *imem = nvkm_instmem(subdev);
228 void *data = imem;
229 if (imem->func->dtor)
230 data = imem->func->dtor(imem);
231 mutex_destroy(&imem->mutex);
232 return data;
233 }
234
235 static const struct nvkm_subdev_func
236 nvkm_instmem = {
237 .dtor = nvkm_instmem_dtor,
238 .oneinit = nvkm_instmem_oneinit,
239 .init = nvkm_instmem_init,
240 .fini = nvkm_instmem_fini,
241 };
242
243 void
nvkm_instmem_ctor(const struct nvkm_instmem_func * func,struct nvkm_device * device,enum nvkm_subdev_type type,int inst,struct nvkm_instmem * imem)244 nvkm_instmem_ctor(const struct nvkm_instmem_func *func, struct nvkm_device *device,
245 enum nvkm_subdev_type type, int inst, struct nvkm_instmem *imem)
246 {
247 nvkm_subdev_ctor(&nvkm_instmem, device, type, inst, &imem->subdev);
248 imem->func = func;
249 spin_lock_init(&imem->lock);
250 INIT_LIST_HEAD(&imem->list);
251 INIT_LIST_HEAD(&imem->boot);
252 mutex_init(&imem->mutex);
253 }
254