1 files changed, 115 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_guc_ct_types.h b/drivers/gpu/drm/xe/xe_guc_ct_types.h
new file mode 100644
index 000000000000..d814d4ee3fc6
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_guc_ct_types.h
@@ -0,0 +1,115 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#ifndef _XE_GUC_CT_TYPES_H_
+#define _XE_GUC_CT_TYPES_H_
+
+#include <linux/interrupt.h>
+#include <linux/iosys-map.h>
+#include <linux/spinlock_types.h>
+#include <linux/wait.h>
+#include <linux/xarray.h>
+
+#include "abi/guc_communication_ctb_abi.h"
+
+struct xe_bo;
+
+/**
+ * struct guc_ctb_info - GuC command transport buffer (CTB) info
+ */
+struct guc_ctb_info {
+	/** @size: size of CTB commands (DW) */
+	u32 size;
+	/** @resv_space: reserved space of CTB commands (DW) */
+	u32 resv_space;
+	/** @head: head of CTB commands (DW) */
+	u32 head;
+	/** @tail: tail of CTB commands (DW) */
+	u32 tail;
+	/** @space: space in CTB commands (DW) */
+	u32 space;
+	/** @broken: channel broken */
+	bool broken;
+};
+
+/**
+ * struct guc_ctb - GuC command transport buffer (CTB)
+ */
+struct guc_ctb {
+	/** @desc: dma buffer map for CTB descriptor */
+	struct iosys_map desc;
+	/** @cmds: dma buffer map for CTB commands */
+	struct iosys_map cmds;
+	/** @info: CTB info */
+	struct guc_ctb_info info;
+};
+
+/**
+ * struct guc_ctb_snapshot - GuC command transport buffer (CTB) snapshot
+ */
+struct guc_ctb_snapshot {
+	/** @desc: snapshot of the CTB descriptor */
+	struct guc_ct_buffer_desc desc;
+	/** @cmds: snapshot of the CTB commands */
+	u32 *cmds;
+	/** @info: snapshot of the CTB info */
+	struct guc_ctb_info info;
+};
+
+/**
+ * struct xe_guc_ct_snapshot - GuC command transport (CT) snapshot
+ */
+struct xe_guc_ct_snapshot {
+	/** @ct_enabled: CT enabled info at capture time. */
+	bool ct_enabled;
+	/** @g2h_outstanding: G2H outstanding info at the capture time */
+	u32 g2h_outstanding;
+	/** @g2h: G2H CTB snapshot */
+	struct guc_ctb_snapshot g2h;
+	/** @h2g: H2G CTB snapshot */
+	struct guc_ctb_snapshot h2g;
+};
+
+/**
+ * struct xe_guc_ct - GuC command transport (CT) layer
+ *
+ * Includes a pair of CT buffers for bi-directional communication and tracking
+ * for the H2G and G2H requests sent and received through the buffers.
+ */
+struct xe_guc_ct {
+	/** @bo: XE BO for CT */
+	struct xe_bo *bo;
+	/** @lock: protects everything in CT layer */
+	struct mutex lock;
+	/** @fast_lock: protects G2H channel and credits */
+	spinlock_t fast_lock;
+	/** @ctbs: buffers for sending and receiving commands */
+	struct {
+		/** @send: Host to GuC (H2G, send) channel */
+		struct guc_ctb h2g;
+		/** @recv: GuC to Host (G2H, receive) channel */
+		struct guc_ctb g2h;
+	} ctbs;
+	/** @g2h_outstanding: number of outstanding G2H */
+	u32 g2h_outstanding;
+	/** @g2h_worker: worker to process G2H messages */
+	struct work_struct g2h_worker;
+	/** @enabled: CT enabled */
+	bool enabled;
+	/** @fence_seqno: G2H fence seqno - 16 bits used by CT */
+	u32 fence_seqno;
+	/** @fence_lookup: G2H fence lookup */
+	struct xarray fence_lookup;
+	/** @wq: wait queue used for reliable CT sends and freeing G2H credits */
+	wait_queue_head_t wq;
+	/** @g2h_fence_wq: wait queue used for G2H fencing */
+	wait_queue_head_t g2h_fence_wq;
+	/** @msg: Message buffer */
+	u32 msg[GUC_CTB_MSG_MAX_LEN];
+	/** @fast_msg: Message buffer */
+	u32 fast_msg[GUC_CTB_MSG_MAX_LEN];
+};
+
+#endif