base.c

  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, enum nvkm_suspend_state suspend)
180{
181	struct nvkm_instmem *imem = nvkm_instmem(subdev);
182	int ret;
183
184	if (suspend) {
185		if (imem->func->suspend) {
186			ret = imem->func->suspend(imem);
187			if (ret)
188				return ret;
189		}
190
191		imem->suspend = true;
192	}
193
194	if (imem->func->fini)
195		imem->func->fini(imem);
196
197	return 0;
198}
199
200static int
201nvkm_instmem_init(struct nvkm_subdev *subdev)
202{
203	struct nvkm_instmem *imem = nvkm_instmem(subdev);
204
205	if (imem->suspend) {
206		if (imem->func->resume)
207			imem->func->resume(imem);
208
209		imem->suspend = false;
210		return 0;
211	}
212
213	nvkm_bar_bar2_init(subdev->device);
214	return 0;
215}
216
217static int
218nvkm_instmem_oneinit(struct nvkm_subdev *subdev)
219{
220	struct nvkm_instmem *imem = nvkm_instmem(subdev);
221	if (imem->func->oneinit)
222		return imem->func->oneinit(imem);
223	return 0;
224}
225
226static void *
227nvkm_instmem_dtor(struct nvkm_subdev *subdev)
228{
229	struct nvkm_instmem *imem = nvkm_instmem(subdev);
230	void *data = imem;
231	if (imem->func->dtor)
232		data = imem->func->dtor(imem);
233	mutex_destroy(&imem->mutex);
234	return data;
235}
236
237static const struct nvkm_subdev_func
238nvkm_instmem = {
239	.dtor = nvkm_instmem_dtor,
240	.oneinit = nvkm_instmem_oneinit,
241	.init = nvkm_instmem_init,
242	.fini = nvkm_instmem_fini,
243};
244
245void
246nvkm_instmem_ctor(const struct nvkm_instmem_func *func, struct nvkm_device *device,
247		  enum nvkm_subdev_type type, int inst, struct nvkm_instmem *imem)
248{
249	nvkm_subdev_ctor(&nvkm_instmem, device, type, inst, &imem->subdev);
250	imem->func = func;
251	spin_lock_init(&imem->lock);
252	INIT_LIST_HEAD(&imem->list);
253	INIT_LIST_HEAD(&imem->boot);
254	mutex_init(&imem->mutex);
255}