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 <core/client.h>
27#include <engine/fifo.h>
28
29#include <nvif/class.h>
30
31static int
32nvkm_dma_oclass_new(struct nvkm_device *device,
33		    const struct nvkm_oclass *oclass, void *data, u32 size,
34		    struct nvkm_object **pobject)
35{
36	struct nvkm_dma *dma = nvkm_dma(oclass->engine);
37	struct nvkm_dmaobj *dmaobj = NULL;
38	int ret;
39
40	ret = dma->func->class_new(dma, oclass, data, size, &dmaobj);
41	if (dmaobj)
42		*pobject = &dmaobj->object;
43	return ret;
44}
45
46static const struct nvkm_device_oclass
47nvkm_dma_oclass_base = {
48	.ctor = nvkm_dma_oclass_new,
49};
50
51static int
52nvkm_dma_oclass_fifo_new(const struct nvkm_oclass *oclass, void *data, u32 size,
53			 struct nvkm_object **pobject)
54{
55	return nvkm_dma_oclass_new(oclass->engine->subdev.device,
56				   oclass, data, size, pobject);
57}
58
59static const struct nvkm_sclass
60nvkm_dma_sclass[] = {
61	{ 0, 0, NV_DMA_FROM_MEMORY, NULL, nvkm_dma_oclass_fifo_new },
62	{ 0, 0, NV_DMA_TO_MEMORY, NULL, nvkm_dma_oclass_fifo_new },
63	{ 0, 0, NV_DMA_IN_MEMORY, NULL, nvkm_dma_oclass_fifo_new },
64};
65
66static int
67nvkm_dma_oclass_base_get(struct nvkm_oclass *sclass, int index,
68			 const struct nvkm_device_oclass **class)
69{
70	const int count = ARRAY_SIZE(nvkm_dma_sclass);
71	if (index < count) {
72		const struct nvkm_sclass *oclass = &nvkm_dma_sclass[index];
73		sclass->base = oclass[0];
74		sclass->engn = oclass;
75		*class = &nvkm_dma_oclass_base;
76		return index;
77	}
78	return count;
79}
80
81static int
82nvkm_dma_oclass_fifo_get(struct nvkm_oclass *oclass, int index)
83{
84	const int count = ARRAY_SIZE(nvkm_dma_sclass);
85	if (index < count) {
86		oclass->base = nvkm_dma_sclass[index];
87		return index;
88	}
89	return count;
90}
91
92static void *
93nvkm_dma_dtor(struct nvkm_engine *engine)
94{
95	return nvkm_dma(engine);
96}
97
98static const struct nvkm_engine_func
99nvkm_dma = {
100	.dtor = nvkm_dma_dtor,
101	.base.sclass = nvkm_dma_oclass_base_get,
102	.fifo.sclass = nvkm_dma_oclass_fifo_get,
103};
104
105int
106nvkm_dma_new_(const struct nvkm_dma_func *func, struct nvkm_device *device,
107	      enum nvkm_subdev_type type, int inst, struct nvkm_dma **pdma)
108{
109	struct nvkm_dma *dma;
110
111	if (!(dma = *pdma = kzalloc(sizeof(*dma), GFP_KERNEL)))
112		return -ENOMEM;
113	dma->func = func;
114
115	return nvkm_engine_ctor(&nvkm_dma, device, type, inst, true, &dma->engine);
116}
117