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 *****************************************************************************/
31void
32nvkm_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
51int
52nvkm_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
73void
74nvkm_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
81void
82nvkm_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
92int
93nvkm_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
110int
111nvkm_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;
140done:
141	if (ret)
142		nvkm_memory_unref(&memory);
143	*pmemory = memory;
144	return ret;
145}
146
147/******************************************************************************
148 * instmem subdev base implementation
149 *****************************************************************************/
150
151u32
152nvkm_instmem_rd32(struct nvkm_instmem *imem, u32 addr)
153{
154	return imem->func->rd32(imem, addr);
155}
156
157void
158nvkm_instmem_wr32(struct nvkm_instmem *imem, u32 addr, u32 data)
159{
160	return imem->func->wr32(imem, addr, data);
161}
162
163void
164nvkm_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
178static int
179nvkm_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
198static int
199nvkm_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
215static int
216nvkm_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
224static void *
225nvkm_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
235static const struct nvkm_subdev_func
236nvkm_instmem = {
237	.dtor = nvkm_instmem_dtor,
238	.oneinit = nvkm_instmem_oneinit,
239	.init = nvkm_instmem_init,
240	.fini = nvkm_instmem_fini,
241};
242
243void
244nvkm_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