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mcp251xfd-dump: add tool to decode chip and driver state of mcp251xfd

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It works on dev coredump data generated by the mcp251xfd driver in
case of failures, as well as on regmap based register dumps.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Marc Kleine-Budde
2021-02-13 23:36:43 +01:00
parent e8c90ddff9
commit 66de96d337
13 changed files with 1913 additions and 1 deletions
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mcp251xfd/mcp251xfd-dump-userspace.h
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/* SPDX-License-Identifier: GPL-2.0
*
* Microchip MCP251xFD Family CAN controller debug tool
*
* Copyright (c) 2019, 2020 Pengutronix,
* Marc Kleine-Budde <kernel@pengutronix.de>
*/
#ifndef _MCP251XFD_DUMP_USERSPACE_H
#define _MCP251XFD_DUMP_USERSPACE_H
#include "mcp251xfd.h"
#include "mcp251xfd-dump.h"
#define MCP251XFD_TX_FIFO 1
#define MCP251XFD_RX_FIFO(x) (MCP251XFD_TX_FIFO + 1 + (x))
struct mcp251xfd_mem {
char buf[0x1000];
};
struct mcp251xfd_ring {
unsigned int head;
unsigned int tail;
u16 base;
u8 nr;
u8 fifo_nr;
u8 obj_num;
u8 obj_size;
};
struct mcp251xfd_priv {
struct regmap *map;
struct mcp251xfd_ring tef[1];
struct mcp251xfd_ring tx[1];
struct mcp251xfd_ring rx[1];
u8 rx_ring_num;
};
static inline u8 mcp251xfd_get_ring_head(const struct mcp251xfd_ring *ring)
{
return ring->head & (ring->obj_num - 1);
}
static inline u8 mcp251xfd_get_ring_tail(const struct mcp251xfd_ring *ring)
{
return ring->tail & (ring->obj_num - 1);
}
void mcp251xfd_dump(struct mcp251xfd_priv *priv);
int mcp251xfd_dev_coredump_read(struct mcp251xfd_priv *priv,
struct mcp251xfd_mem *mem,
const char *file_path);
int mcp251xfd_regmap_read(struct mcp251xfd_priv *priv,
struct mcp251xfd_mem *mem,
const char *file_path);
#endif