wifi: mt76: mt7915: enable coredump support

Host triggered and catastrophic event triggered firmware core dumping
for basic firmware issues triage, including state reporting, task/irq
info, function calltrace and MCU memory dump.

Signed-off-by: Ryder Lee <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>

mt7915/coredump.h

@@ -0,0 +1,136 @@
+/* SPDX-License-Identifier: ISC */
+/* Copyright (C) 2022 MediaTek Inc. */
+
+#ifndef _COREDUMP_H_
+#define _COREDUMP_H_
+
+#include "mt7915.h"
+
+struct trace {
+	u32 id;
+	u32 timestamp;
+};
+
+struct mt7915_coredump {
+	char magic[16];
+
+	u32 len;
+
+	guid_t guid;
+
+	/* time-of-day stamp */
+	u64 tv_sec;
+	/* time-of-day stamp, nano-seconds */
+	u64 tv_nsec;
+	/* kernel version */
+	char kernel[64];
+	/* firmware version */
+	char fw_ver[ETHTOOL_FWVERS_LEN];
+
+	u32 device_id;
+
+	/* exception state */
+	char fw_state[12];
+
+	u32 last_msg_id;
+	u32 eint_info_idx;
+	u32 irq_info_idx;
+	u32 sched_info_idx;
+
+	/* schedule info */
+	char trace_sched[32];
+	struct {
+		struct trace t;
+		u32 pc;
+	} sched[60];
+
+	/* irq info */
+	char trace_irq[32];
+	struct trace irq[60];
+
+	/* task queue status */
+	char task_qid[32];
+	struct {
+		u32 read;
+		u32 write;
+	} taskq[2];
+
+	/* task stack info */
+	char task_info[32];
+	struct {
+		u32 start;
+		u32 end;
+		u32 size;
+	} taski[2];
+
+	/* firmware context */
+	char fw_context[24];
+	struct {
+		u32 idx;
+		u32 handler;
+	} context;
+
+	/* link registers calltrace */
+	u32 call_stack[16];
+
+	/* memory content */
+	u8 data[];
+} __packed;
+
+struct mt7915_coredump_mem {
+	u32 len;
+	u8 data[];
+} __packed;
+
+struct mt7915_mem_hdr {
+	u32 start;
+	u32 len;
+	u8 data[];
+};
+
+struct mt7915_mem_region {
+	u32 start;
+	size_t len;
+
+	const char *name;
+};
+
+#ifdef CONFIG_DEV_COREDUMP
+
+const struct mt7915_mem_region *
+mt7915_coredump_get_mem_layout(struct mt7915_dev *dev, u32 *num);
+struct mt7915_crash_data *mt7915_coredump_new(struct mt7915_dev *dev);
+int mt7915_coredump_submit(struct mt7915_dev *dev);
+int mt7915_coredump_register(struct mt7915_dev *dev);
+void mt7915_coredump_unregister(struct mt7915_dev *dev);
+
+#else /* CONFIG_DEV_COREDUMP */
+
+static inline const struct mt7915_mem_region *
+mt7915_coredump_get_mem_layout(struct mt7915_dev *dev, u32 *num)
+{
+	return NULL;
+}
+
+static inline int mt7915_coredump_submit(struct mt7915_dev *dev)
+{
+	return 0;
+}
+
+static inline struct mt7915_crash_data *mt7915_coredump_new(struct mt7915_dev *dev)
+{
+	return NULL;
+}
+
+static inline int mt7915_coredump_register(struct mt7915_dev *dev)
+{
+	return 0;
+}
+
+static inline void mt7915_coredump_unregister(struct mt7915_dev *dev)
+{
+}
+
+#endif /* CONFIG_DEV_COREDUMP */
+
+#endif /* _COREDUMP_H_ */