1/*	$NetBSD: nouveau_nvkm_engine_dma_base.c,v 1.5 2021/12/18 23:45:35 riastradh Exp $	*/
2
3/*
4 * Copyright 2012 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs
25 */
26#include <sys/cdefs.h>
27__KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_engine_dma_base.c,v 1.5 2021/12/18 23:45:35 riastradh Exp $");
28
29#include "priv.h"
30
31#include <core/client.h>
32#include <engine/fifo.h>
33
34#include <nvif/class.h>
35
36static int
37nvkm_dma_oclass_new(struct nvkm_device *device,
38		    const struct nvkm_oclass *oclass, void *data, u32 size,
39		    struct nvkm_object **pobject)
40{
41	struct nvkm_dma *dma = nvkm_dma(oclass->engine);
42	struct nvkm_dmaobj *dmaobj = NULL;
43	int ret;
44
45	ret = dma->func->class_new(dma, oclass, data, size, &dmaobj);
46	if (dmaobj)
47		*pobject = &dmaobj->object;
48	return ret;
49}
50
51static const struct nvkm_device_oclass
52nvkm_dma_oclass_base = {
53	.ctor = nvkm_dma_oclass_new,
54};
55
56static int
57nvkm_dma_oclass_fifo_new(const struct nvkm_oclass *oclass, void *data, u32 size,
58			 struct nvkm_object **pobject)
59{
60	return nvkm_dma_oclass_new(oclass->engine->subdev.device,
61				   oclass, data, size, pobject);
62}
63
64static const struct nvkm_sclass
65nvkm_dma_sclass[] = {
66	{ 0, 0, NV_DMA_FROM_MEMORY, NULL, nvkm_dma_oclass_fifo_new },
67	{ 0, 0, NV_DMA_TO_MEMORY, NULL, nvkm_dma_oclass_fifo_new },
68	{ 0, 0, NV_DMA_IN_MEMORY, NULL, nvkm_dma_oclass_fifo_new },
69};
70
71static int
72nvkm_dma_oclass_base_get(struct nvkm_oclass *sclass, int index,
73			 const struct nvkm_device_oclass **class)
74{
75	const int count = ARRAY_SIZE(nvkm_dma_sclass);
76	if (index < count) {
77		const struct nvkm_sclass *oclass = &nvkm_dma_sclass[index];
78		sclass->base = oclass[0];
79		sclass->engn = oclass;
80		*class = &nvkm_dma_oclass_base;
81		return index;
82	}
83	return count;
84}
85
86static int
87nvkm_dma_oclass_fifo_get(struct nvkm_oclass *oclass, int index)
88{
89	const int count = ARRAY_SIZE(nvkm_dma_sclass);
90	if (index < count) {
91		oclass->base = nvkm_dma_sclass[index];
92		return index;
93	}
94	return count;
95}
96
97static void *
98nvkm_dma_dtor(struct nvkm_engine *engine)
99{
100	return nvkm_dma(engine);
101}
102
103static const struct nvkm_engine_func
104nvkm_dma = {
105	.dtor = nvkm_dma_dtor,
106	.base.sclass = nvkm_dma_oclass_base_get,
107	.fifo.sclass = nvkm_dma_oclass_fifo_get,
108};
109
110int
111nvkm_dma_new_(const struct nvkm_dma_func *func, struct nvkm_device *device,
112	      int index, struct nvkm_dma **pdma)
113{
114	struct nvkm_dma *dma;
115
116	if (!(dma = *pdma = kzalloc(sizeof(*dma), GFP_KERNEL)))
117		return -ENOMEM;
118	dma->func = func;
119
120	return nvkm_engine_ctor(&nvkm_dma, device, index, true, &dma->engine);
121}
122