1 files changed, 125 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/ucgrp.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/ucgrp.c
new file mode 100644
index 000000000000..52c594dfb1b8
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/ucgrp.c
@@ -0,0 +1,125 @@
+/*
+ * Copyright 2021 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+#define nvkm_ucgrp(p) container_of((p), struct nvkm_ucgrp, object)
+#include "priv.h"
+#include "cgrp.h"
+#include "runl.h"
+
+#include <subdev/mmu.h>
+
+#include <nvif/if0021.h>
+
+struct nvkm_ucgrp {
+	struct nvkm_object object;
+	struct nvkm_cgrp *cgrp;
+};
+
+static int
+nvkm_ucgrp_chan_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
+		    struct nvkm_object **pobject)
+{
+	struct nvkm_cgrp *cgrp = nvkm_ucgrp(oclass->parent)->cgrp;
+
+	return nvkm_uchan_new(cgrp->runl->fifo, cgrp, oclass, argv, argc, pobject);
+}
+
+static int
+nvkm_ucgrp_sclass(struct nvkm_object *object, int index, struct nvkm_oclass *oclass)
+{
+	struct nvkm_cgrp *cgrp = nvkm_ucgrp(object)->cgrp;
+	struct nvkm_fifo *fifo = cgrp->runl->fifo;
+	const struct nvkm_fifo_func_chan *chan = &fifo->func->chan;
+	int c = 0;
+
+	/* *_CHANNEL_GPFIFO_* */
+	if (chan->user.oclass) {
+		if (c++ == index) {
+			oclass->base = chan->user;
+			oclass->ctor = nvkm_ucgrp_chan_new;
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static void *
+nvkm_ucgrp_dtor(struct nvkm_object *object)
+{
+	struct nvkm_ucgrp *ucgrp = nvkm_ucgrp(object);
+
+	nvkm_cgrp_unref(&ucgrp->cgrp);
+	return ucgrp;
+}
+
+static const struct nvkm_object_func
+nvkm_ucgrp = {
+	.dtor = nvkm_ucgrp_dtor,
+	.sclass = nvkm_ucgrp_sclass,
+};
+
+int
+nvkm_ucgrp_new(struct nvkm_fifo *fifo, const struct nvkm_oclass *oclass, void *argv, u32 argc,
+	       struct nvkm_object **pobject)
+{
+	union nvif_cgrp_args *args = argv;
+	struct nvkm_runl *runl;
+	struct nvkm_vmm *vmm;
+	struct nvkm_ucgrp *ucgrp;
+	int ret;
+
+	if (argc < sizeof(args->v0) || args->v0.version != 0)
+		return -ENOSYS;
+	argc -= sizeof(args->v0);
+
+	if (args->v0.namelen != argc)
+		return -EINVAL;
+
+	/* Lookup objects referenced in args. */
+	runl = nvkm_runl_get(fifo, args->v0.runlist, 0);
+	if (!runl)
+		return -EINVAL;
+
+	vmm = nvkm_uvmm_search(oclass->client, args->v0.vmm);
+	if (IS_ERR(vmm))
+		return PTR_ERR(vmm);
+
+	/* Allocate channel group. */
+	if (!(ucgrp = kzalloc(sizeof(*ucgrp), GFP_KERNEL))) {
+		ret = -ENOMEM;
+		goto done;
+	}
+
+	nvkm_object_ctor(&nvkm_ucgrp, oclass, &ucgrp->object);
+	*pobject = &ucgrp->object;
+
+	ret = nvkm_cgrp_new(runl, args->v0.name, vmm, true, &ucgrp->cgrp);
+	if (ret)
+		goto done;
+
+	/* Return channel group info to caller. */
+	args->v0.cgid = ucgrp->cgrp->id;
+
+done:
+	nvkm_vmm_unref(&vmm);
+	return ret;
+}