1/*
2 * Copyright 2021 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#define nvkm_ucgrp(p) container_of((p), struct nvkm_ucgrp, object)
23#include "priv.h"
24#include "cgrp.h"
25#include "runl.h"
26
27#include <subdev/mmu.h>
28
29#include <nvif/if0021.h>
30
31struct nvkm_ucgrp {
32	struct nvkm_object object;
33	struct nvkm_cgrp *cgrp;
34};
35
36static int
37nvkm_ucgrp_chan_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
38		    struct nvkm_object **pobject)
39{
40	struct nvkm_cgrp *cgrp = nvkm_ucgrp(oclass->parent)->cgrp;
41
42	return nvkm_uchan_new(cgrp->runl->fifo, cgrp, oclass, argv, argc, pobject);
43}
44
45static int
46nvkm_ucgrp_sclass(struct nvkm_object *object, int index, struct nvkm_oclass *oclass)
47{
48	struct nvkm_cgrp *cgrp = nvkm_ucgrp(object)->cgrp;
49	struct nvkm_fifo *fifo = cgrp->runl->fifo;
50	const struct nvkm_fifo_func_chan *chan = &fifo->func->chan;
51	int c = 0;
52
53	/* *_CHANNEL_GPFIFO_* */
54	if (chan->user.oclass) {
55		if (c++ == index) {
56			oclass->base = chan->user;
57			oclass->ctor = nvkm_ucgrp_chan_new;
58			return 0;
59		}
60	}
61
62	return -EINVAL;
63}
64
65static void *
66nvkm_ucgrp_dtor(struct nvkm_object *object)
67{
68	struct nvkm_ucgrp *ucgrp = nvkm_ucgrp(object);
69
70	nvkm_cgrp_unref(&ucgrp->cgrp);
71	return ucgrp;
72}
73
74static const struct nvkm_object_func
75nvkm_ucgrp = {
76	.dtor = nvkm_ucgrp_dtor,
77	.sclass = nvkm_ucgrp_sclass,
78};
79
80int
81nvkm_ucgrp_new(struct nvkm_fifo *fifo, const struct nvkm_oclass *oclass, void *argv, u32 argc,
82	       struct nvkm_object **pobject)
83{
84	union nvif_cgrp_args *args = argv;
85	struct nvkm_runl *runl;
86	struct nvkm_vmm *vmm;
87	struct nvkm_ucgrp *ucgrp;
88	int ret;
89
90	if (argc < sizeof(args->v0) || args->v0.version != 0)
91		return -ENOSYS;
92	argc -= sizeof(args->v0);
93
94	if (args->v0.namelen != argc)
95		return -EINVAL;
96
97	/* Lookup objects referenced in args. */
98	runl = nvkm_runl_get(fifo, args->v0.runlist, 0);
99	if (!runl)
100		return -EINVAL;
101
102	vmm = nvkm_uvmm_search(oclass->client, args->v0.vmm);
103	if (IS_ERR(vmm))
104		return PTR_ERR(vmm);
105
106	/* Allocate channel group. */
107	if (!(ucgrp = kzalloc(sizeof(*ucgrp), GFP_KERNEL))) {
108		ret = -ENOMEM;
109		goto done;
110	}
111
112	nvkm_object_ctor(&nvkm_ucgrp, oclass, &ucgrp->object);
113	*pobject = &ucgrp->object;
114
115	ret = nvkm_cgrp_new(runl, args->v0.name, vmm, true, &ucgrp->cgrp);
116	if (ret)
117		goto done;
118
119	/* Return channel group info to caller. */
120	args->v0.cgid = ucgrp->cgrp->id;
121
122done:
123	nvkm_vmm_unref(&vmm);
124	return ret;
125}
126