ucgrp.c

  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}