1 files changed, 87 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/falcon/qmgr.c b/drivers/gpu/drm/nouveau/nvkm/falcon/qmgr.c
new file mode 100644
index 000000000000..a453de341a75
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/falcon/qmgr.c
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
+ *
+ * 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.
+ *
+ */
+#include "qmgr.h"
+
+struct nvkm_falcon_qmgr_seq *
+nvkm_falcon_qmgr_seq_acquire(struct nvkm_falcon_qmgr *qmgr)
+{
+	const struct nvkm_subdev *subdev = qmgr->falcon->owner;
+	struct nvkm_falcon_qmgr_seq *seq;
+	u32 index;
+
+	mutex_lock(&qmgr->seq.mutex);
+	index = find_first_zero_bit(qmgr->seq.tbl, NVKM_FALCON_QMGR_SEQ_NUM);
+	if (index >= NVKM_FALCON_QMGR_SEQ_NUM) {
+		nvkm_error(subdev, "no free sequence available\n");
+		mutex_unlock(&qmgr->seq.mutex);
+		return ERR_PTR(-EAGAIN);
+	}
+
+	set_bit(index, qmgr->seq.tbl);
+	mutex_unlock(&qmgr->seq.mutex);
+
+	seq = &qmgr->seq.id[index];
+	seq->state = SEQ_STATE_PENDING;
+	return seq;
+}
+
+void
+nvkm_falcon_qmgr_seq_release(struct nvkm_falcon_qmgr *qmgr,
+			     struct nvkm_falcon_qmgr_seq *seq)
+{
+	/* no need to acquire seq.mutex since clear_bit is atomic */
+	seq->state = SEQ_STATE_FREE;
+	seq->callback = NULL;
+	reinit_completion(&seq->done);
+	clear_bit(seq->id, qmgr->seq.tbl);
+}
+
+void
+nvkm_falcon_qmgr_del(struct nvkm_falcon_qmgr **pqmgr)
+{
+	struct nvkm_falcon_qmgr *qmgr = *pqmgr;
+	if (qmgr) {
+		kfree(*pqmgr);
+		*pqmgr = NULL;
+	}
+}
+
+int
+nvkm_falcon_qmgr_new(struct nvkm_falcon *falcon,
+		     struct nvkm_falcon_qmgr **pqmgr)
+{
+	struct nvkm_falcon_qmgr *qmgr;
+	int i;
+
+	if (!(qmgr = *pqmgr = kzalloc(sizeof(*qmgr), GFP_KERNEL)))
+		return -ENOMEM;
+
+	qmgr->falcon = falcon;
+	mutex_init(&qmgr->seq.mutex);
+	for (i = 0; i < NVKM_FALCON_QMGR_SEQ_NUM; i++) {
+		qmgr->seq.id[i].id = i;
+		init_completion(&qmgr->seq.id[i].done);
+	}
+
+	return 0;
+}