drm/nouveau/gsp: add common client alloc code

570.144 has incompatible changes to NV0000_ALLOC_PARAMETERS.

Factor out the common code so it can be shared.

Signed-off-by: Ben Skeggs <bskeggs@nvidia.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 49 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/client.c b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/client.c
new file mode 100644
index 000000000000..72d3e3ca84c2
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/client.c
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (c) 2025, NVIDIA CORPORATION. All rights reserved.
+ */
+#include "rm.h"
+
+void
+nvkm_gsp_client_dtor(struct nvkm_gsp_client *client)
+{
+	const unsigned int id = client->object.handle - NVKM_RM_CLIENT(0);
+	struct nvkm_gsp *gsp = client->gsp;
+
+	if (!gsp)
+		return;
+
+	if (client->object.client)
+		nvkm_gsp_rm_free(&client->object);
+
+	mutex_lock(&gsp->client_id.mutex);
+	idr_remove(&gsp->client_id.idr, id);
+	mutex_unlock(&gsp->client_id.mutex);
+
+	client->gsp = NULL;
+}
+
+int
+nvkm_gsp_client_ctor(struct nvkm_gsp *gsp, struct nvkm_gsp_client *client)
+{
+	int id, ret;
+
+	if (WARN_ON(!gsp->rm))
+		return -ENOSYS;
+
+	mutex_lock(&gsp->client_id.mutex);
+	id = idr_alloc(&gsp->client_id.idr, client, 0, NVKM_RM_CLIENT_MASK + 1, GFP_KERNEL);
+	mutex_unlock(&gsp->client_id.mutex);
+	if (id < 0)
+		return id;
+
+	client->gsp = gsp;
+	client->object.client = client;
+	INIT_LIST_HEAD(&client->events);
+
+	ret = gsp->rm->api->client->ctor(client, NVKM_RM_CLIENT(id));
+	if (ret)
+		nvkm_gsp_client_dtor(client);
+
+	return ret;
+}