1 files changed, 89 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/falcon/qmgr.h b/drivers/gpu/drm/nouveau/nvkm/falcon/qmgr.h
new file mode 100644
index 000000000000..a45cd705e4f7
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/falcon/qmgr.h
@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: MIT */
+#ifndef __NVKM_FALCON_QMGR_H__
+#define __NVKM_FALCON_QMGR_H__
+#include <core/falcon.h>
+
+#define HDR_SIZE sizeof(struct nv_falcon_msg)
+#define QUEUE_ALIGNMENT 4
+/* max size of the messages we can receive */
+#define MSG_BUF_SIZE 128
+
+/**
+ * struct nvkm_falcon_qmgr_seq - keep track of ongoing commands
+ *
+ * Every time a command is sent, a sequence is assigned to it so the
+ * corresponding message can be matched. Upon receiving the message, a callback
+ * can be called and/or a completion signaled.
+ *
+ * @id:		sequence ID
+ * @state:	current state
+ * @callback:	callback to call upon receiving matching message
+ * @completion:	completion to signal after callback is called
+ */
+struct nvkm_falcon_qmgr_seq {
+	u16 id;
+	enum {
+		SEQ_STATE_FREE = 0,
+		SEQ_STATE_PENDING,
+		SEQ_STATE_USED,
+		SEQ_STATE_CANCELLED
+	} state;
+	bool async;
+	nvkm_falcon_qmgr_callback callback;
+	void *priv;
+	struct completion done;
+	int result;
+};
+
+/*
+ * We can have an arbitrary number of sequences, but realistically we will
+ * probably not use that much simultaneously.
+ */
+#define NVKM_FALCON_QMGR_SEQ_NUM 16
+
+struct nvkm_falcon_qmgr {
+	struct nvkm_falcon *falcon;
+
+	struct {
+		struct mutex mutex;
+		struct nvkm_falcon_qmgr_seq id[NVKM_FALCON_QMGR_SEQ_NUM];
+		unsigned long tbl[BITS_TO_LONGS(NVKM_FALCON_QMGR_SEQ_NUM)];
+	} seq;
+};
+
+struct nvkm_falcon_qmgr_seq *
+nvkm_falcon_qmgr_seq_acquire(struct nvkm_falcon_qmgr *);
+void nvkm_falcon_qmgr_seq_release(struct nvkm_falcon_qmgr *,
+				  struct nvkm_falcon_qmgr_seq *);
+
+struct nvkm_falcon_cmdq {
+	struct nvkm_falcon_qmgr *qmgr;
+	const char *name;
+	struct mutex mutex;
+	struct completion ready;
+
+	u32 head_reg;
+	u32 tail_reg;
+	u32 offset;
+	u32 size;
+
+	u32 position;
+};
+
+struct nvkm_falcon_msgq {
+	struct nvkm_falcon_qmgr *qmgr;
+	const char *name;
+	struct mutex mutex;
+
+	u32 head_reg;
+	u32 tail_reg;
+	u32 offset;
+
+	u32 position;
+};
+
+#define FLCNQ_PRINTK(t,q,f,a...)                                               \
+       FLCN_PRINTK(t, (q)->qmgr->falcon, "%s: "f, (q)->name, ##a)
+#define FLCNQ_DBG(q,f,a...) FLCNQ_PRINTK(debug, (q), f, ##a)
+#define FLCNQ_ERR(q,f,a...) FLCNQ_PRINTK(error, (q), f, ##a)
+#endif