From 088176e4e038ed69cc185cd9e86797dae956673b Mon Sep 17 00:00:00 2001
From: Marc Kleine-Budde <mkl@pengutronix.de>
Date: Fri, 11 Mar 2022 15:50:02 +0100
Subject: [PATCH 1/5] mcp251xfd-dump: fail if no registers can be read from
 regmap file

---
 mcp251xfd/mcp251xfd-regmap.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/mcp251xfd/mcp251xfd-regmap.c b/mcp251xfd/mcp251xfd-regmap.c
index 61105f0..902ef5f 100644
--- a/mcp251xfd/mcp251xfd-regmap.c
+++ b/mcp251xfd/mcp251xfd-regmap.c
@@ -2,7 +2,7 @@
 //
 // Microchip MCP251xFD Family CAN controller debug tool
 //
-// Copyright (c) 2020 Pengutronix,
+// Copyright (c) 2020, 2022 Pengutronix,
 //               Marc Kleine-Budde <kernel@pengutronix.de>
 //
 
@@ -26,21 +26,32 @@ do_mcp251xfd_regmap_read(struct mcp251xfd_priv *priv,
 	FILE *reg_file;
 	uint16_t reg;
 	uint32_t val;
+	unsigned int n = 0;
+	int err = 0;
 
 	reg_file = fopen(file_path, "r");
 	if (!reg_file)
 		return -errno;
 
 	while (fscanf(reg_file, "%hx: %x\n", &reg, &val) == 2) {
-		if (reg >= ARRAY_SIZE(mem->buf))
-			return -EINVAL;
+		if (reg >= ARRAY_SIZE(mem->buf)) {
+			err = -EINVAL;
+			goto out_close;
+		}
 
 		*(uint32_t *)(mem->buf + reg) = val;
+
+		n++;
 	}
 
+	printf("regmap: Found %u registers in %s\n", n, file_path);
+	if (!n)
+		err = -EINVAL;
+
+ out_close:
 	fclose(reg_file);
 
-	return 0;
+	return err;
 }
 
 int mcp251xfd_regmap_read(struct mcp251xfd_priv *priv,

From ceb9761544ab27189de34f7468964894290736bd Mon Sep 17 00:00:00 2001
From: Marc Kleine-Budde <mkl@pengutronix.de>
Date: Tue, 3 Jan 2023 13:08:00 +0100
Subject: [PATCH 2/5] mcp251xfd-dump: regmap: skip lines that cannot be read

---
 mcp251xfd/mcp251xfd-regmap.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/mcp251xfd/mcp251xfd-regmap.c b/mcp251xfd/mcp251xfd-regmap.c
index 902ef5f..1144722 100644
--- a/mcp251xfd/mcp251xfd-regmap.c
+++ b/mcp251xfd/mcp251xfd-regmap.c
@@ -2,7 +2,7 @@
 //
 // Microchip MCP251xFD Family CAN controller debug tool
 //
-// Copyright (c) 2020, 2022 Pengutronix,
+// Copyright (c) 2020, 2022, 2023 Pengutronix,
 //               Marc Kleine-Budde <kernel@pengutronix.de>
 //
 
@@ -27,13 +27,18 @@ do_mcp251xfd_regmap_read(struct mcp251xfd_priv *priv,
 	uint16_t reg;
 	uint32_t val;
 	unsigned int n = 0;
-	int err = 0;
+	int ret, err = 0;
 
 	reg_file = fopen(file_path, "r");
 	if (!reg_file)
 		return -errno;
 
-	while (fscanf(reg_file, "%hx: %x\n", &reg, &val) == 2) {
+	while ((ret = fscanf(reg_file, "%hx: %x\n", &reg, &val)) != EOF) {
+		if (ret != 2) {
+			fscanf(reg_file, "%*[^\n]\n");
+			continue;
+		}
+
 		if (reg >= ARRAY_SIZE(mem->buf)) {
 			err = -EINVAL;
 			goto out_close;

From 0847fb34b4438e5e6fba8a51e34857f29eb1d3d8 Mon Sep 17 00:00:00 2001
From: Marc Kleine-Budde <mkl@pengutronix.de>
Date: Tue, 3 Jan 2023 15:44:39 +0100
Subject: [PATCH 3/5] mcp251xfd-gen-testdata: add script to generate
 mcp251xfd-dump data

---
 GNUmakefile.am                      |  9 ++++--
 mcp251xfd/mcp251xfd-gen-testdata.sh | 50 +++++++++++++++++++++++++++++
 2 files changed, 56 insertions(+), 3 deletions(-)
 create mode 100755 mcp251xfd/mcp251xfd-gen-testdata.sh

diff --git a/GNUmakefile.am b/GNUmakefile.am
index 86bcb39..a734e9d 100644
--- a/GNUmakefile.am
+++ b/GNUmakefile.am
@@ -60,6 +60,11 @@ mcp251xfd_dump_SOURCES = \
 	mcp251xfd/mcp251xfd-regmap.c \
 	mcp251xfd/mcp251xfd.h
 
+EXTRA_DIST += \
+	mcp251xfd/99-devcoredump.rules \
+	mcp251xfd/devcoredump \
+	mcp251xfd/mcp251xfd-gen-testdata.sh
+
 bin_PROGRAMS = \
 	asc2log \
 	bcmserver \
@@ -106,9 +111,7 @@ EXTRA_DIST += \
 	autogen.sh \
 	can-j1939-kickstart.md \
 	can-j1939.md \
-	can-tc-init-etf.sh \
-	mcp251xfd/99-devcoredump.rules \
-	mcp251xfd/devcoredump
+	can-tc-init-etf.sh
 
 MAINTAINERCLEANFILES = \
 	configure \
diff --git a/mcp251xfd/mcp251xfd-gen-testdata.sh b/mcp251xfd/mcp251xfd-gen-testdata.sh
new file mode 100755
index 0000000..3f57a71
--- /dev/null
+++ b/mcp251xfd/mcp251xfd-gen-testdata.sh
@@ -0,0 +1,50 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) 2023 Pengutronix,
+#               Marc Kleine-Budde <kernel@pengutronix.de>
+
+set -x
+set -e
+
+DEV=${1:-can0}
+SPI=${2:-$(ethtool -i ${DEV}|sed -ne "s/bus-info: //p")}
+
+modprobe -r mcp251xfd
+modprobe mcp251xfd
+
+sleep 2
+
+ip link set ${DEV} down
+
+sleep 2
+rm -vf /var/log/devcoredump-*.dump
+
+ip link set ${DEV} up type can bitrate 1000000 dbitrate 4000000 fd on restart-ms 1000 berr-reporting off listen-only off loopback on
+
+ethtool -g ${DEV} || true
+ethtool -c ${DEV} || true
+
+cangen ${DEV} -Di -L8 -I2 -p 10 -g 200 -n 3
+
+cat /sys/kernel/debug/regmap/${SPI}-crc/registers > data/registers-canfd.dump
+
+ip link set ${DEV} down
+sleep 2
+cp -av /var/log/devcoredump-*.dump data
+
+
+ip link set ${DEV} up type can bitrate 1000000 fd off restart-ms 1000 berr-reporting off listen-only off loopback on
+
+rm -vf /var/log/devcoredump-*.dump
+
+ethtool -g ${DEV} || true
+ethtool -c ${DEV} || true
+
+cangen ${DEV} -Di -L8 -I2 -p 10 -g 200 -n 7
+
+cat /sys/kernel/debug/regmap/${SPI}-crc/registers > data/registers-classic-can.dump
+
+ip link set ${DEV} down
+sleep 2
+cp -av /var/log/devcoredump-*.dump data

From b4042d0205b7b101778a644d44d50d4fcbcfb61e Mon Sep 17 00:00:00 2001
From: Marc Kleine-Budde <mkl@pengutronix.de>
Date: Tue, 8 Mar 2022 18:06:45 +0100
Subject: [PATCH 4/5] mcp251xfd-dump: add test data

---
 GNUmakefile.am                                |   8 +
 mcp251xfd/data/devcoredump-canfd-v5.15.dump   | Bin 0 -> 5888 bytes
 mcp251xfd/data/devcoredump-canfd.dump         | Bin 0 -> 5960 bytes
 .../data/devcoredump-classic-can-v5.15.dump   | Bin 0 -> 5888 bytes
 mcp251xfd/data/devcoredump-classic-can.dump   | Bin 0 -> 6032 bytes
 mcp251xfd/data/registers-canfd-v5.15.dump     | 706 ++++++++++++++++++
 mcp251xfd/data/registers-canfd.dump           | 706 ++++++++++++++++++
 .../data/registers-classic-can-v5.15.dump     | 706 ++++++++++++++++++
 mcp251xfd/data/registers-classic-can.dump     | 706 ++++++++++++++++++
 9 files changed, 2832 insertions(+)
 create mode 100644 mcp251xfd/data/devcoredump-canfd-v5.15.dump
 create mode 100644 mcp251xfd/data/devcoredump-canfd.dump
 create mode 100644 mcp251xfd/data/devcoredump-classic-can-v5.15.dump
 create mode 100644 mcp251xfd/data/devcoredump-classic-can.dump
 create mode 100644 mcp251xfd/data/registers-canfd-v5.15.dump
 create mode 100644 mcp251xfd/data/registers-canfd.dump
 create mode 100644 mcp251xfd/data/registers-classic-can-v5.15.dump
 create mode 100644 mcp251xfd/data/registers-classic-can.dump

diff --git a/GNUmakefile.am b/GNUmakefile.am
index a734e9d..5a7ad75 100644
--- a/GNUmakefile.am
+++ b/GNUmakefile.am
@@ -62,6 +62,14 @@ mcp251xfd_dump_SOURCES = \
 
 EXTRA_DIST += \
 	mcp251xfd/99-devcoredump.rules \
+	mcp251xfd/data/devcoredump-canfd-v5.15.dump \
+	mcp251xfd/data/devcoredump-canfd.dump \
+	mcp251xfd/data/devcoredump-classic-can-v5.15.dump \
+	mcp251xfd/data/devcoredump-classic-can.dump \
+	mcp251xfd/data/registers-canfd-v5.15.dump \
+	mcp251xfd/data/registers-canfd.dump \
+	mcp251xfd/data/registers-classic-can-v5.15.dump \
+	mcp251xfd/data/registers-classic-can.dump \
 	mcp251xfd/devcoredump \
 	mcp251xfd/mcp251xfd-gen-testdata.sh
 
diff --git a/mcp251xfd/data/devcoredump-canfd-v5.15.dump b/mcp251xfd/data/devcoredump-canfd-v5.15.dump
new file mode 100644
index 0000000000000000000000000000000000000000..84ce9fc35cfa2c0e20270de94f283178aa8a2dbb
GIT binary patch
literal 5888
zcmZA5FQ_v49>?){&f~L>yDN)9F7Cx(aKQzG!C(-sa1FwB!62-`Fu`Cj7z_r3ECz$Y
zAY6kN3<iV2U@#aA27|$1ki{TegF#qf4F+NN^L5|59QFspYku!@W}GvQf9Cw~@9%<+
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zflqY4;`v7}`p}O73}Ohw7{MsUFpddKVhYok!7S!5j|D7Z30*8>1*=%YIySJ0Eo@^4
zyV%1%4seJg9ODG1IKw$EaEU8i;|905!#y7Gh$lSb1+RF+J3jD<&euHu=tUp;F@Qk~
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K_vhnfwf;Ny6`u$I

literal 0
HcmV?d00001

diff --git a/mcp251xfd/data/devcoredump-canfd.dump b/mcp251xfd/data/devcoredump-canfd.dump
new file mode 100644
index 0000000000000000000000000000000000000000..57be9555ff5d3863cc1a77a9c49778a2ebe56f6d
GIT binary patch
literal 5960
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literal 0
HcmV?d00001

diff --git a/mcp251xfd/data/devcoredump-classic-can-v5.15.dump b/mcp251xfd/data/devcoredump-classic-can-v5.15.dump
new file mode 100644
index 0000000000000000000000000000000000000000..59f73648f3fdc23af9ef17c41465f73acbc6649b
GIT binary patch
literal 5888
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diff --git a/mcp251xfd/data/registers-canfd-v5.15.dump b/mcp251xfd/data/registers-canfd-v5.15.dump
new file mode 100644
index 0000000..ff0bd20
--- /dev/null
+++ b/mcp251xfd/data/registers-canfd-v5.15.dump
@@ -0,0 +1,706 @@
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diff --git a/mcp251xfd/data/registers-canfd.dump b/mcp251xfd/data/registers-canfd.dump
new file mode 100644
index 0000000..3f1b016
--- /dev/null
+++ b/mcp251xfd/data/registers-canfd.dump
@@ -0,0 +1,706 @@
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diff --git a/mcp251xfd/data/registers-classic-can-v5.15.dump b/mcp251xfd/data/registers-classic-can-v5.15.dump
new file mode 100644
index 0000000..ff711f6
--- /dev/null
+++ b/mcp251xfd/data/registers-classic-can-v5.15.dump
@@ -0,0 +1,706 @@
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+840: 00000000
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+8f0: 00000000
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+970: 00000000
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+978: 00000000
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+a90: 00000000
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+a98: 00000000
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+aa4: 00000000
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+abc: 00000000
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+e08: 03000305
+e0c: 00000007
+e10: 00000000
+e14: 00000000
diff --git a/mcp251xfd/data/registers-classic-can.dump b/mcp251xfd/data/registers-classic-can.dump
new file mode 100644
index 0000000..14a4a03
--- /dev/null
+++ b/mcp251xfd/data/registers-classic-can.dump
@@ -0,0 +1,706 @@
+000: 05ab0760
+004: 001c0900
+008: 000e0303
+00c: 00021000
+010: 03184e05
+014: 00010000
+018: 40400040
+01c: 3f1a0000
+020: 00000000
+024: 00000000
+028: 00000000
+02c: 00000000
+030: 00000000
+034: 00000000
+038: 00000000
+03c: 00000007
+040: 07000029
+044: 00000000
+048: 00000054
+04c: 00000000
+050: 00600080
+054: 00000005
+058: 00000060
+05c: 1f000029
+060: 00000700
+064: 000000ec
+068: 1f000029
+06c: 00000000
+070: 000002e0
+074: 0f000029
+078: 00000000
+07c: 00000560
+080: 07600090
+084: 00000707
+088: 00000710
+08c: 00600000
+090: 00000000
+094: 00000720
+098: 00600000
+09c: 00000000
+0a0: 00000730
+0a4: 00600000
+0a8: 00000000
+0ac: 00000740
+0b0: 00600000
+0b4: 00000000
+0b8: 00000750
+0bc: 00600000
+0c0: 00000000
+0c4: 00000760
+0c8: 00600000
+0cc: 00000000
+0d0: 00000770
+0d4: 00600000
+0d8: 00000000
+0dc: 00000780
+0e0: 00600000
+0e4: 00000000
+0e8: 00000790
+0ec: 00600000
+0f0: 00000000
+0f4: 000007a0
+0f8: 00600000
+0fc: 00000000
+100: 000007b0
+104: 00600000
+108: 00000000
+10c: 000007c0
+110: 00600000
+114: 00000000
+118: 000007d0
+11c: 00600000
+120: 00000000
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+128: 00600000
+12c: 00000000
+130: 000007f0
+134: 00600000
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+14c: 00600000
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+158: 00600000
+15c: 00000000
+160: 00000830
+164: 00600000
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+16c: 00000840
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+174: 00000000
+178: 00000850
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+180: 00000000
+184: 00000860
+188: 00600000
+18c: 00000000
+190: 00000870
+194: 00600000
+198: 00000000
+19c: 00000880
+1a0: 00600000
+1a4: 00000000
+1a8: 00000890
+1ac: 00600000
+1b0: 00000000
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+210: 00000000
+214: 00000000
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+21c: 00000000
+220: 00000000
+224: 00000000
+228: 00000000
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+230: 00000000
+234: 00000000
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+240: 00000000
+244: 00000000
+248: 00000000
+24c: 00000000
+250: 00000000
+254: 00000000
+258: 00000000
+25c: 00000000
+260: 00000000
+264: 00000000
+268: 00000000
+26c: 00000000
+270: 00000000
+274: 00000000
+278: 00000000
+27c: 00000000
+280: 00000000
+284: 00000000
+288: 00000000
+28c: 00000000
+290: 00000000
+294: 00000000
+298: 00000000
+29c: 00000000
+2a0: 00000000
+2a4: 00000000
+2a8: 00000000
+2ac: 00000000
+2b0: 00000000
+2b4: 00000000
+2b8: 00000000
+2bc: 00000000
+2c0: 00000000
+2c4: 00000000
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+2cc: 00000000
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+2d4: 00000000
+2d8: 00000000
+2dc: 00000000
+2e0: 00000000
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+2e8: 00000000
+2ec: 00000000
+400: 00000002
+404: 00000008
+408: 002a5227
+40c: 00000002
+410: 00000208
+414: 00a49627
+418: 00000002
+41c: 00000408
+420: 011edd47
+424: 00000002
+428: 00000608
+42c: 0199149f
+430: 00000002
+434: 00000808
+438: 021357d7
+43c: 00000002
+440: 00000a08
+444: 028d9e07
+448: 00000002
+44c: 00000c08
+450: 0307e45f
+454: 00000000
+458: 00000000
+45c: 00000000
+460: 00000002
+464: 00000008
+468: 002a5227
+46c: 00000000
+470: 00000000
+474: 00000002
+478: 00000008
+47c: 00a49627
+480: 00000001
+484: 00000000
+488: 00000002
+48c: 00000008
+490: 011edd47
+494: 00000002
+498: 00000000
+49c: 00000002
+4a0: 00000008
+4a4: 0199149f
+4a8: 00000003
+4ac: 00000000
+4b0: 00000002
+4b4: 00000008
+4b8: 021357d7
+4bc: 00000004
+4c0: 00000000
+4c4: 00000002
+4c8: 00000008
+4cc: 028d9e07
+4d0: 00000005
+4d4: 00000000
+4d8: 00000002
+4dc: 00000008
+4e0: 0307e45f
+4e4: 00000006
+4e8: 00000000
+4ec: 00000000
+4f0: 00000000
+4f4: 00000000
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+4fc: 00000000
+500: 00000000
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+530: 00000000
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+57c: 00000000
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+584: 00000000
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+5d0: 00000000
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+5d8: 00000000
+5dc: 00000000
+5e0: 00000000
+5e4: 00000000
+5e8: 00000000
+5ec: 00000000
+5f0: 00000000
+5f4: 00000000
+5f8: 00000000
+5fc: 00000000
+600: 00000000
+604: 00000000
+608: 00000000
+60c: 00000000
+610: 00000000
+614: 00000000
+618: 00000000
+61c: 00000000
+620: 00000000
+624: 00000000
+628: 00000000
+62c: 00000000
+630: 00000000
+634: 00000000
+638: 00000000
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+640: 00000000
+644: 00000000
+648: 00000000
+64c: 00000000
+650: 00000000
+654: 00000000
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+65c: 00000000
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+664: 00000000
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+674: 00000000
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+68c: 00000000
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+698: 00000000
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+6a4: 00000000
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+6ac: 00000000
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+6b4: 00000000
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+710: 00000000
+714: 00000000
+718: 00000000
+71c: 00000000
+720: 00000000
+724: 00000000
+728: 00000000
+72c: 00000000
+730: 00000000
+734: 00000000
+738: 00000000
+73c: 00000000
+740: 00000000
+744: 00000000
+748: 00000000
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+78c: 00000000
+790: 00000000
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+7a4: 00000000
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+7ac: 00000000
+7b0: 00000000
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+7c0: 00000000
+7c4: 00000000
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+7cc: 00000000
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+7dc: 00000000
+7e0: 00000000
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+7fc: 00000000
+800: 00000000
+804: 00000000
+808: 00000000
+80c: 00000000
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+814: 00000000
+818: 00000000
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+820: 00000000
+824: 00000000
+828: 00000000
+82c: 00000000
+830: 00000000
+834: 00000000
+838: 00000000
+83c: 00000000
+840: 00000000
+844: 00000000
+848: 00000000
+84c: 00000000
+850: 00000000
+854: 00000000
+858: 00000000
+85c: 00000000
+860: 00000000
+864: 00000000
+868: 00000000
+86c: 00000000
+870: 00000000
+874: 00000000
+878: 00000000
+87c: 00000000
+880: 00000000
+884: 00000000
+888: 00000000
+88c: 00000000
+890: 00000000
+894: 00000000
+898: 00000000
+89c: 00000000
+8a0: 00000000
+8a4: 00000000
+8a8: 00000000
+8ac: 00000000
+8b0: 00000000
+8b4: 00000000
+8b8: 00000000
+8bc: 00000000
+8c0: 00000000
+8c4: 00000000
+8c8: 00000000
+8cc: 00000000
+8d0: 00000000
+8d4: 00000000
+8d8: 00000000
+8dc: 00000000
+8e0: 00000000
+8e4: 00000000
+8e8: 00000000
+8ec: 00000000
+8f0: 00000000
+8f4: 00000000
+8f8: 00000000
+8fc: 00000000
+900: 00000000
+904: 00000000
+908: 00000000
+90c: 00000000
+910: 00000000
+914: 00000000
+918: 00000000
+91c: 00000000
+920: 00000000
+924: 00000000
+928: 00000000
+92c: 00000000
+930: 00000000
+934: 00000000
+938: 00000000
+93c: 00000000
+940: 00000000
+944: 00000000
+948: 00000000
+94c: 00000000
+950: 00000000
+954: 00000000
+958: 00000000
+95c: 00000000
+960: 00000000
+964: 00000000
+968: 00000000
+96c: 00000000
+970: 00000000
+974: 00000000
+978: 00000000
+97c: 00000000
+980: 00000000
+984: 00000000
+988: 00000000
+98c: 00000000
+990: 00000000
+994: 00000000
+998: 00000000
+99c: 00000000
+9a0: 00000000
+9a4: 00000000
+9a8: 00000000
+9ac: 00000000
+9b0: 00000000
+9b4: 00000000
+9b8: 00000000
+9bc: 00000000
+9c0: 00000000
+9c4: 00000000
+9c8: 00000000
+9cc: 00000000
+9d0: 00000000
+9d4: 00000000
+9d8: 00000000
+9dc: 00000000
+9e0: 00000000
+9e4: 00000000
+9e8: 00000000
+9ec: 00000000
+9f0: 00000000
+9f4: 00000000
+9f8: 00000000
+9fc: 00000000
+a00: 00000000
+a04: 00000000
+a08: 00000000
+a0c: 00000000
+a10: 00000000
+a14: 00000000
+a18: 00000000
+a1c: 00000000
+a20: 00000000
+a24: 00000000
+a28: 00000000
+a2c: 00000000
+a30: 00000000
+a34: 00000000
+a38: 00000000
+a3c: 00000000
+a40: 00000000
+a44: 00000000
+a48: 00000000
+a4c: 00000000
+a50: 00000000
+a54: 00000000
+a58: 00000000
+a5c: 00000000
+a60: 00000000
+a64: 00000000
+a68: 00000000
+a6c: 00000000
+a70: 00000000
+a74: 00000000
+a78: 00000000
+a7c: 00000000
+a80: 00000000
+a84: 00000000
+a88: 00000000
+a8c: 00000000
+a90: 00000000
+a94: 00000000
+a98: 00000000
+a9c: 00000000
+aa0: 00000002
+aa4: 00000008
+aa8: 00000000
+aac: 00000000
+ab0: 00000002
+ab4: 00000208
+ab8: 00000001
+abc: 00000000
+ac0: 00000002
+ac4: 00000408
+ac8: 00000002
+acc: 00000000
+ad0: 00000002
+ad4: 00000608
+ad8: 00000003
+adc: 00000000
+ae0: 00000002
+ae4: 00000808
+ae8: 00000004
+aec: 00000000
+af0: 00000002
+af4: 00000a08
+af8: 00000005
+afc: 00000000
+b00: 00000002
+b04: 00000c08
+b08: 00000006
+b0c: 00000000
+b10: 00000000
+b14: 00000000
+b18: 00000000
+b1c: 00000000
+b20: 00000000
+b24: 00000000
+b28: 00000000
+b2c: 00000000
+b30: 00000000
+b34: 00000000
+b38: 00000000
+b3c: 00000000
+b40: 00000000
+b44: 00000000
+b48: 00000000
+b4c: 00000000
+b50: 00000000
+b54: 00000000
+b58: 00000000
+b5c: 00000000
+b60: 00000000
+b64: 00000000
+b68: 00000000
+b6c: 00000000
+b70: 00000000
+b74: 00000000
+b78: 00000000
+b7c: 00000000
+b80: 00000000
+b84: 00000000
+b88: 00000000
+b8c: 00000000
+b90: 00000000
+b94: 00000000
+b98: 00000000
+b9c: 00000000
+ba0: 00000000
+ba4: 00000000
+ba8: 00000000
+bac: 00000000
+bb0: 00000000
+bb4: 00000000
+bb8: 00000000
+bbc: 00000000
+bc0: 00000000
+bc4: 00000000
+bc8: 00000000
+bcc: 00000000
+bd0: 00000000
+bd4: 00000000
+bd8: 00000000
+bdc: 00000000
+be0: 00000000
+be4: 00000000
+be8: 00000000
+bec: 00000000
+bf0: 00000000
+bf4: 00000000
+bf8: 00000000
+bfc: 00000000
+e00: 00000468
+e04: 03030003
+e08: 03000305
+e0c: 00000007
+e10: 00000000
+e14: 00000000

From f3b35e8e8034bf98b7c8d2b379f960117b672961 Mon Sep 17 00:00:00 2001
From: Marc Kleine-Budde <mkl@pengutronix.de>
Date: Wed, 16 Mar 2022 13:18:52 +0100
Subject: [PATCH 5/5] mcp251xfd-dump: add support for dumps created with Linux
 kernel >= v5.18

---
 mcp251xfd/mcp251xfd-dev-coredump.c   |  36 +-
 mcp251xfd/mcp251xfd-dump-userspace.h |  28 +-
 mcp251xfd/mcp251xfd-dump.c           | 608 ++++++++++++++-------------
 mcp251xfd/mcp251xfd-main.c           |  15 +
 4 files changed, 355 insertions(+), 332 deletions(-)

diff --git a/mcp251xfd/mcp251xfd-dev-coredump.c b/mcp251xfd/mcp251xfd-dev-coredump.c
index 680c734..0349d22 100644
--- a/mcp251xfd/mcp251xfd-dev-coredump.c
+++ b/mcp251xfd/mcp251xfd-dev-coredump.c
@@ -21,7 +21,6 @@
 #include "mcp251xfd.h"
 #include "mcp251xfd-dump-userspace.h"
 
-
 struct mcp251xfd_dump_iter {
 	const void *start;
 	const struct mcp251xfd_dump_object_header *hdr;
@@ -29,20 +28,20 @@ struct mcp251xfd_dump_iter {
 	const void *object_end;
 };
 
-static __attribute__((__unused__)) const char *
+const char *
 get_object_type_str(enum mcp251xfd_dump_object_type object_type)
 {
 	switch (object_type) {
 	case MCP251XFD_DUMP_OBJECT_TYPE_REG:
-		return "reg";
+		return "REG";
 	case MCP251XFD_DUMP_OBJECT_TYPE_TEF:
-		return "tef";
+		return "TEF";
 	case MCP251XFD_DUMP_OBJECT_TYPE_RX:
-		return "rx";
+		return "RX";
 	case MCP251XFD_DUMP_OBJECT_TYPE_TX:
-		return "tx";
+		return "TX";
 	case MCP251XFD_DUMP_OBJECT_TYPE_END:
-		return "end";
+		return "END";
 	default:
 		return "<unknown>";
 	}
@@ -86,7 +85,7 @@ do_dev_coredump_read_reg(const struct mcp251xfd_priv *priv,
 		reg = le32toh(object->reg);
 		val = le32toh(object->val);
 
-		pr_debug("%s: object=0x%04zx reg=0x%04x - val=0x%08x\n",
+		pr_debug("%s: offset=0x%04zx reg=0x%04x - val=0x%08x\n",
 			 __func__,
 			 (void *)object - iter->start,
 			 reg, val);
@@ -116,7 +115,7 @@ do_dev_coredump_read_ring(const struct mcp251xfd_priv *priv,
 		key = le32toh(object->reg);
 		val = le32toh(object->val);
 
-		pr_debug("%s: reg=0x%04zx key=0x%02x: %8s - val=0x%08x\n",
+		pr_debug("%s: offset=0x%04zx key=0x%02x: %8s - val=0x%08x\n",
 			 __func__,
 			 (void *)object - iter->start,
 			 key, get_ring_key_str(key), val);
@@ -144,7 +143,7 @@ do_dev_coredump_read_ring(const struct mcp251xfd_priv *priv,
 			ring->obj_size = val;
 			break;
 		default:
-			return -EINVAL;
+			continue;
 		}
 	}
 
@@ -167,6 +166,7 @@ do_dev_coredump_read(struct mcp251xfd_priv *priv,
 	       le32toh(iter->hdr->magic) == MCP251XFD_DUMP_MAGIC) {
 		const struct mcp251xfd_dump_object_header *hdr = iter->hdr;
 		enum mcp251xfd_dump_object_type object_type;
+		struct mcp251xfd_ring ring;
 		size_t object_offset, object_len;
 		int err;
 
@@ -180,6 +180,8 @@ do_dev_coredump_read(struct mcp251xfd_priv *priv,
 		iter->object_start = iter->start + object_offset;
 		iter->object_end = iter->object_start + object_len;
 
+		mcp251xfd_dump_ring_init(&ring);
+
 		pr_debug("%s: hdr=0x%04zx type=0x%08x: %8s - offset=0x%04zx len=0x%04zx end=0x%04zx\n",
 			 __func__,
 			 (void *)iter->hdr - iter->start,
@@ -191,13 +193,17 @@ do_dev_coredump_read(struct mcp251xfd_priv *priv,
 			err = do_dev_coredump_read_reg(priv, iter, mem);
 			break;
 		case MCP251XFD_DUMP_OBJECT_TYPE_TEF:
-			err = do_dev_coredump_read_ring(priv, iter, priv->tef);
-			break;
 		case MCP251XFD_DUMP_OBJECT_TYPE_RX:
-			err = do_dev_coredump_read_ring(priv, iter, priv->rx);
-			break;
 		case MCP251XFD_DUMP_OBJECT_TYPE_TX:
-			err = do_dev_coredump_read_ring(priv, iter, priv->tx);
+			err = do_dev_coredump_read_ring(priv, iter, &ring);
+			if (err)
+				return err;
+
+			if (ring.fifo_nr >= ARRAY_SIZE(priv->ring))
+				return -EINVAL;
+
+			priv->ring[ring.fifo_nr] = ring;
+
 			break;
 		case MCP251XFD_DUMP_OBJECT_TYPE_END:
 			return 0;
diff --git a/mcp251xfd/mcp251xfd-dump-userspace.h b/mcp251xfd/mcp251xfd-dump-userspace.h
index 890821e..0c7ee5d 100644
--- a/mcp251xfd/mcp251xfd-dump-userspace.h
+++ b/mcp251xfd/mcp251xfd-dump-userspace.h
@@ -12,14 +12,17 @@
 #include "mcp251xfd.h"
 #include "mcp251xfd-dump.h"
 
-#define MCP251XFD_TX_FIFO 1
-#define MCP251XFD_RX_FIFO(x) (MCP251XFD_TX_FIFO + 1 + (x))
+#define MCP251XFD_DUMP_UNKNOWN (-1U)
 
 struct mcp251xfd_mem {
 	char buf[0x1000];
 };
 
 struct mcp251xfd_ring {
+	enum mcp251xfd_dump_object_type	type;
+	const struct mcp251xfd_dump_regs_fifo *fifo;
+	void *ram;
+
 	unsigned int head;
 	unsigned int tail;
 
@@ -30,25 +33,14 @@ struct mcp251xfd_ring {
 	u8 obj_size;
 };
 
+#define MCP251XFD_RING_TEF 0
+
 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;
+	struct mcp251xfd_ring ring[32];
 };
 
-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_ring_init(struct mcp251xfd_ring *ring);
 
 void mcp251xfd_dump(struct mcp251xfd_priv *priv);
 int mcp251xfd_dev_coredump_read(struct mcp251xfd_priv *priv,
@@ -57,5 +49,7 @@ int mcp251xfd_dev_coredump_read(struct mcp251xfd_priv *priv,
 int mcp251xfd_regmap_read(struct mcp251xfd_priv *priv,
 			  struct mcp251xfd_mem *mem,
 			  const char *file_path);
+const char *
+get_object_type_str(enum mcp251xfd_dump_object_type object_type);
 
 #endif
diff --git a/mcp251xfd/mcp251xfd-dump.c b/mcp251xfd/mcp251xfd-dump.c
index eb2e1ed..74d9ee8 100644
--- a/mcp251xfd/mcp251xfd-dump.c
+++ b/mcp251xfd/mcp251xfd-dump.c
@@ -2,7 +2,7 @@
 //
 // Microchip MCP251xFD Family CAN controller debug tool
 //
-// Copyright (c) 2019, 2020, 2021 Pengutronix,
+// Copyright (c) 2019, 2020, 2021, 2022 Pengutronix,
 //               Marc Kleine-Budde <kernel@pengutronix.de>
 //
 
@@ -72,6 +72,18 @@ struct mcp251xfd_dump_regs_mcp251xfd {
 	u32 devid;
 };
 
+static bool
+mcp251xfd_fifo_is_unused(const struct mcp251xfd_dump_regs_fifo *fifo)
+{
+	return fifo->con == 0x00600000 && fifo->sta == 0x00000000;
+}
+
+static bool
+mcp251xfd_fifo_is_rx(const struct mcp251xfd_dump_regs_fifo *fifo)
+{
+	return !(fifo->con & MCP251XFD_REG_FIFOCON_TXEN);
+}
+
 #define __dump_bit(val, prefix, bit, desc)	       \
 	pr_info("%16s   %s\t\t%s\n", __stringify(bit), \
 		(val) & prefix##_##bit ? "x" : " ", desc)
@@ -426,6 +438,8 @@ mcp251xfd_dump_regs(const struct mcp251xfd_priv *priv,
 		    const struct mcp251xfd_dump_regs *regs,
 		    const struct mcp251xfd_dump_regs_mcp251xfd *regs_mcp251xfd)
 {
+	unsigned int i;
+
 	netdev_info(priv->ndev, "-------------------- register dump --------------------\n");
 	__dump_call(regs, con);
 	__dump_call(regs, nbtcfg);
@@ -444,29 +458,45 @@ mcp251xfd_dump_regs(const struct mcp251xfd_priv *priv,
 	__dump_call(regs, bdiag1);
 	__dump_call(regs_mcp251xfd, osc);
 	__dump_call(regs_mcp251xfd, iocon);
-	pr_info("-------------------- TEF --------------------\n");
-	__dump_call(regs, tefcon);
-	__dump_call(regs, tefsta);
-	__dump_call(regs, tefua);
-	pr_info("-------------------- TX_FIFO --------------------\n");
-	__dump_call_fifo(fifocon, fifo[MCP251XFD_TX_FIFO].con);
-	__dump_call_fifo(fifosta, fifo[MCP251XFD_TX_FIFO].sta);
-	__dump_call_fifo(fifoua, fifo[MCP251XFD_TX_FIFO].ua);
-	pr_info(" -------------------- RX_FIFO --------------------\n");
-	__dump_call_fifo(fifocon, fifo[MCP251XFD_RX_FIFO(0)].con);
-	__dump_call_fifo(fifosta, fifo[MCP251XFD_RX_FIFO(0)].sta);
-	__dump_call_fifo(fifoua, fifo[MCP251XFD_RX_FIFO(0)].ua);
-	netdev_info(priv->ndev, "------------------------- end -------------------------\n");
+
+	for (i = 0; i < ARRAY_SIZE(regs->fifo); i++) {
+		const struct mcp251xfd_dump_regs_fifo *fifo = &regs->fifo[i];
+
+		if (mcp251xfd_fifo_is_unused(fifo))
+			continue;
+
+		pr_info("----------------------- FIFO %2d - ", i);
+
+		if (i == 0) {
+			pr_info("TEF -----------------\n");
+
+			__dump_call(regs, tefcon);
+			__dump_call(regs, tefsta);
+			__dump_call(regs, tefua);
+		} else {
+			if (mcp251xfd_fifo_is_rx(fifo))
+				pr_info("RX ------------------\n");
+			else
+				pr_info("TX ------------------\n");
+
+			__dump_call_fifo(fifocon, fifo[i].con);
+			__dump_call_fifo(fifosta, fifo[i].sta);
+			__dump_call_fifo(fifoua, fifo[i].ua);
+		}
+	}
+	netdev_info(priv->ndev, "----------------------- end ---------------------------\n");
 }
 
 #undef __dump_call
 #undef __dump_call_fifo
 
-static u8 mcp251xfd_dump_get_fifo_size(const struct mcp251xfd_priv *priv, const struct mcp251xfd_dump_regs *regs, u32 fifo_con)
+static u8
+mcp251xfd_dump_get_fifo_size(const struct mcp251xfd_priv *priv,
+			     const struct mcp251xfd_dump_regs_fifo *regs_fifo)
 {
 	u8 obj_size;
 
-	obj_size = FIELD_GET(MCP251XFD_REG_FIFOCON_PLSIZE_MASK, fifo_con);
+	obj_size = FIELD_GET(MCP251XFD_REG_FIFOCON_PLSIZE_MASK, regs_fifo->con);
 	switch (obj_size) {
 	case MCP251XFD_REG_FIFOCON_PLSIZE_8:
 		return 8;
@@ -489,16 +519,91 @@ static u8 mcp251xfd_dump_get_fifo_size(const struct mcp251xfd_priv *priv, const
 	return 0;
 }
 
-static u8 mcp251xfd_dump_get_fifo_obj_num(const struct mcp251xfd_priv *priv, const struct mcp251xfd_dump_regs *regs, u32 fifo_con)
+static u8
+mcp251xfd_dump_get_tef_obj_size(const struct mcp251xfd_priv *priv,
+				const struct mcp251xfd_dump_regs_fifo *fifo)
+{
+	return sizeof(struct mcp251xfd_hw_tef_obj);
+}
+
+static u8
+mcp251xfd_dump_get_rx_obj_size(const struct mcp251xfd_priv *priv,
+			       const struct mcp251xfd_dump_regs_fifo *fifo)
+{
+	return sizeof(struct mcp251xfd_hw_rx_obj_can) -
+		sizeof_field(struct mcp251xfd_hw_rx_obj_can, data) +
+		mcp251xfd_dump_get_fifo_size(priv, fifo);
+}
+
+static u8
+mcp251xfd_dump_get_tx_obj_size(const struct mcp251xfd_priv *priv,
+			       const struct mcp251xfd_dump_regs_fifo *fifo)
+{
+	return sizeof(struct mcp251xfd_hw_tx_obj_can) -
+		sizeof_field(struct mcp251xfd_hw_tx_obj_can, data) +
+		mcp251xfd_dump_get_fifo_size(priv, fifo);
+}
+
+static u8
+mcp251xfd_dump_get_fifo_obj_num(const struct mcp251xfd_priv *priv,
+				const struct mcp251xfd_dump_regs_fifo *fifo)
 {
 	u8 obj_num;
 
-	obj_num = FIELD_GET(MCP251XFD_REG_FIFOCON_FSIZE_MASK, fifo_con);
+	obj_num = FIELD_GET(MCP251XFD_REG_FIFOCON_FSIZE_MASK, fifo->con);
 
 	return obj_num + 1;
 }
 
-static void mcp251xfd_dump_ram_fifo_obj_data(const struct mcp251xfd_priv *priv, const u8 *data, u8 dlc)
+static u16
+mcp251xfd_dump_get_ring_obj_addr(const struct mcp251xfd_priv *priv,
+				 const struct mcp251xfd_ring *ring,
+				 u8 n)
+{
+	return ring->base + ring->obj_size * n;
+}
+
+static void *
+mcp251xfd_dump_get_ring_hw_obj(const struct mcp251xfd_priv *priv,
+			       const struct mcp251xfd_ring *ring,
+			       u8 n)
+{
+	return ring->ram + ring->obj_size * n;
+}
+
+static u8
+mcp251xfd_dump_get_ring_head(const struct mcp251xfd_priv *priv,
+			     const struct mcp251xfd_ring *ring)
+{
+	return ring->head & (ring->obj_num - 1);
+}
+
+static u8
+mcp251xfd_dump_get_ring_tail(const struct mcp251xfd_priv *priv,
+			     const struct mcp251xfd_ring *ring)
+{
+	return ring->tail & (ring->obj_num - 1);
+}
+
+static u8
+mcp251xfd_dump_get_chip_head(const struct mcp251xfd_priv *priv,
+			     const struct mcp251xfd_ring *ring)
+{
+	return FIELD_GET(MCP251XFD_REG_FIFOSTA_FIFOCI_MASK,
+			 ring->fifo->sta);
+}
+
+static u8
+mcp251xfd_dump_get_chip_tail(const struct mcp251xfd_priv *priv,
+			     const struct mcp251xfd_ring *ring)
+{
+	return (ring->fifo->ua -
+		(ring->base - MCP251XFD_RAM_START)) / ring->obj_size;
+}
+
+static void
+mcp251xfd_dump_ring_obj_data(const struct mcp251xfd_priv *priv,
+			     const u8 *data, u8 dlc)
 {
 	int i;
 	u8 len;
@@ -529,326 +634,228 @@ static void mcp251xfd_dump_ram_fifo_obj_data(const struct mcp251xfd_priv *priv,
 		pr_cont("\n");
 }
 
-/* TEF */
-
-static u8
-mcp251xfd_dump_get_tef_obj_num(const struct mcp251xfd_priv *priv,
-			       const struct mcp251xfd_dump_regs *regs)
+static void
+mcp251xfd_dump_analyze_regs_and_ram(struct mcp251xfd_priv *priv,
+				    const struct mcp251xfd_dump_regs *regs,
+				    const struct mcp251xfd_dump_ram *ram)
 {
-	return mcp251xfd_dump_get_fifo_obj_num(priv, regs, regs->tef.con);
+	u16 base = MCP251XFD_RAM_START;
+	u8 ring_nr_rx = 0, ring_nr_tx = 0;
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(regs->fifo); i++) {
+		const struct mcp251xfd_dump_regs_fifo *fifo;
+		struct mcp251xfd_ring *ring = &priv->ring[i];
+
+		if (i == MCP251XFD_RING_TEF) {
+			/* FIFO 0 is the TXQ, but it's unused by the driver
+			 * put TEF here to make things easier.
+			 */
+			fifo = &regs->tef;
+
+			ring->type = MCP251XFD_DUMP_OBJECT_TYPE_TEF;
+
+			ring->nr = 0;
+			ring->obj_size = mcp251xfd_dump_get_tef_obj_size(priv, fifo);
+		} else {
+			fifo = &regs->fifo[i];
+
+			if (mcp251xfd_fifo_is_unused(fifo)) {
+				continue;
+			} else if (mcp251xfd_fifo_is_rx(fifo)) {
+				ring->type = MCP251XFD_DUMP_OBJECT_TYPE_RX;
+				ring->nr = ring_nr_rx++;
+				ring->obj_size = mcp251xfd_dump_get_rx_obj_size(priv, fifo);
+			} else {
+				ring->type = MCP251XFD_DUMP_OBJECT_TYPE_TX;
+				ring->nr = ring_nr_tx++;
+				ring->obj_size = mcp251xfd_dump_get_tx_obj_size(priv, fifo);
+			}
+		}
+
+		ring->fifo = fifo;
+		ring->ram = (void *)ram + (base - MCP251XFD_RAM_START);
+
+		ring->base = base;
+		ring->fifo_nr = i;
+		ring->obj_num = mcp251xfd_dump_get_fifo_obj_num(priv, fifo);
+
+		base = mcp251xfd_dump_get_ring_obj_addr(priv, ring, ring->obj_num);
+	}
+
+	printf("Found %u RX-FIFO%s, %u TX-FIFO%s\n\n",
+	       ring_nr_rx, ring_nr_rx > 1 ? "s" : "",
+	       ring_nr_tx, ring_nr_tx > 1 ? "s" : "");
 }
 
-static u8
-mcp251xfd_dump_get_tef_tail(const struct mcp251xfd_priv *priv,
-			    const struct mcp251xfd_dump_regs *regs)
+static const char *
+mcp251xfd_dump_ring_obj_one_fifo_flags_chip(const struct mcp251xfd_priv *priv,
+					    const struct mcp251xfd_ring *ring,
+					    const u8 n)
 {
-	return regs->tefua / sizeof(struct mcp251xfd_hw_tef_obj);
+	if (mcp251xfd_dump_get_chip_tail(priv, ring) != n)
+		return "";
+
+	if (ring->type == MCP251XFD_DUMP_OBJECT_TYPE_TX) {
+		if (!(ring->fifo->sta & MCP251XFD_REG_FIFOSTA_TFNRFNIF))
+			return "  chip-FIFO-full";
+		if (ring->fifo->sta & MCP251XFD_REG_FIFOSTA_TFERFFIF)
+			return "  chip-FIFO-empty";
+	} else {
+		if (ring->fifo->sta & MCP251XFD_REG_FIFOSTA_TFERFFIF)
+			return "  chip-FIFO-full";
+		if (!(ring->fifo->sta & MCP251XFD_REG_FIFOSTA_TFNRFNIF))
+			return "  chip-FIFO-empty";
+	}
+
+	return "";
 }
 
-static u16
-mcp251xfd_dump_get_tef_obj_rel_addr(const struct mcp251xfd_priv *priv,
-				    u8 n)
+static const char *
+mcp251xfd_dump_ring_obj_one_fifo_flags_ring(const struct mcp251xfd_priv *priv,
+					    const struct mcp251xfd_ring *ring,
+					    const u8 n)
 {
-	return sizeof(struct mcp251xfd_hw_tef_obj) * n;
+	if (ring->head == MCP251XFD_DUMP_UNKNOWN ||
+	    ring->tail == MCP251XFD_DUMP_UNKNOWN ||
+	    mcp251xfd_dump_get_ring_tail(priv, ring) != n ||
+	    mcp251xfd_dump_get_ring_head(priv, ring) != mcp251xfd_dump_get_ring_tail(priv, ring))
+		return "";
+
+	if (ring->head == ring->tail)
+		return "  ring-FIFO-empty";
+	else
+		return "  ring-FIFO-full";
+
+	return "";
 }
 
-static u16
-mcp251xfd_dump_get_tef_obj_addr(const struct mcp251xfd_priv *priv,
-				u8 n)
-{
-	return mcp251xfd_dump_get_tef_obj_rel_addr(priv, n) +
-		MCP251XFD_RAM_START;
-}
-
-/* TX */
-
-static u8
-mcp251xfd_dump_get_tx_obj_size(const struct mcp251xfd_priv *priv,
-			       const struct mcp251xfd_dump_regs *regs)
-{
-	return sizeof(struct mcp251xfd_hw_tx_obj_can) -
-		sizeof_field(struct mcp251xfd_hw_tx_obj_can, data) +
-		mcp251xfd_dump_get_fifo_size(priv, regs, regs->tx_fifo.con);
-}
-
-static u8
-mcp251xfd_dump_get_tx_obj_num(const struct mcp251xfd_priv *priv,
-			      const struct mcp251xfd_dump_regs *regs)
-{
-	return mcp251xfd_dump_get_fifo_obj_num(priv, regs, regs->tx_fifo.con);
-}
-
-static u16
-mcp251xfd_dump_get_tx_obj_rel_addr(const struct mcp251xfd_priv *priv,
-				   const struct mcp251xfd_dump_regs *regs,
-				   u8 n)
-{
-	return mcp251xfd_dump_get_tef_obj_rel_addr(priv, mcp251xfd_dump_get_tef_obj_num(priv, regs)) +
-		mcp251xfd_dump_get_tx_obj_size(priv, regs) * n;
-}
-
-static u16
-mcp251xfd_dump_get_tx_obj_addr(const struct mcp251xfd_priv *priv,
-			       const struct mcp251xfd_dump_regs *regs, u8 n)
-{
-	return mcp251xfd_dump_get_tx_obj_rel_addr(priv, regs, n) +
-		MCP251XFD_RAM_START;
-}
-
-static u8
-mcp251xfd_dump_get_tx_tail(const struct mcp251xfd_priv *priv,
-			   const struct mcp251xfd_dump_regs *regs)
-{
-	return (regs->fifo[MCP251XFD_TX_FIFO].ua -
-		mcp251xfd_dump_get_tx_obj_rel_addr(priv, regs, 0)) /
-		mcp251xfd_dump_get_tx_obj_size(priv, regs);
-}
-
-static u8
-mcp251xfd_dump_get_tx_head(const struct mcp251xfd_priv *priv,
-			   const struct mcp251xfd_dump_regs *regs)
-{
-	return FIELD_GET(MCP251XFD_REG_FIFOSTA_FIFOCI_MASK,
-			 regs->fifo[MCP251XFD_TX_FIFO].sta);
-}
-
-/* RX */
-
-static u8
-mcp251xfd_dump_get_rx_obj_size(const struct mcp251xfd_priv *priv,
-			       const struct mcp251xfd_dump_regs *regs)
-{
-	return sizeof(struct mcp251xfd_hw_rx_obj_can) -
-		sizeof_field(struct mcp251xfd_hw_rx_obj_can, data) +
-		mcp251xfd_dump_get_fifo_size(priv, regs, regs->rx_fifo.con);
-}
-
-static u8
-mcp251xfd_dump_get_rx_obj_num(const struct mcp251xfd_priv *priv,
-			      const struct mcp251xfd_dump_regs *regs)
-{
-	return mcp251xfd_dump_get_fifo_obj_num(priv, regs, regs->rx_fifo.con);
-}
-
-static u16
-mcp251xfd_dump_get_rx_obj_rel_addr(const struct mcp251xfd_priv *priv,
-				   const struct mcp251xfd_dump_regs *regs, u8 n)
-{
-	return mcp251xfd_dump_get_tx_obj_rel_addr(priv, regs, mcp251xfd_dump_get_tx_obj_num(priv, regs)) +
-		mcp251xfd_dump_get_rx_obj_size(priv, regs) * n;
-}
-
-static u16
-mcp251xfd_dump_get_rx_obj_addr(const struct mcp251xfd_priv *priv,
-			       const struct mcp251xfd_dump_regs *regs, u8 n)
-{
-	return mcp251xfd_dump_get_rx_obj_rel_addr(priv, regs, n) + MCP251XFD_RAM_START;
-}
-
-static u8
-mcp251xfd_dump_get_rx_tail(const struct mcp251xfd_priv *priv,
-			   const struct mcp251xfd_dump_regs *regs)
-{
-	return (regs->fifo[MCP251XFD_RX_FIFO(0)].ua -
-		mcp251xfd_dump_get_rx_obj_rel_addr(priv, regs, 0)) /
-		mcp251xfd_dump_get_rx_obj_size(priv, regs);
-}
-
-static u8
-mcp251xfd_dump_get_rx_head(const struct mcp251xfd_priv *priv,
-			   const struct mcp251xfd_dump_regs *regs)
-{
-	return FIELD_GET(MCP251XFD_REG_FIFOSTA_FIFOCI_MASK, regs->fifo[MCP251XFD_RX_FIFO(0)].sta);
-}
-
-/* dump TEF */
-
 static void
-mcp251xfd_dump_ram_tef_obj_one(const struct mcp251xfd_priv *priv,
-			       const struct mcp251xfd_dump_regs *regs,
-			       const struct mcp251xfd_ring *tef,
-			       const struct mcp251xfd_hw_tef_obj *hw_tef_obj,
-			       u8 n)
+mcp251xfd_dump_ring_obj_one(const struct mcp251xfd_priv *priv,
+			    const struct mcp251xfd_ring *ring,
+			    const void *hw_obj, const u8 n)
 {
-	pr_info("TEF Object: 0x%02x (0x%03x)%s%s%s%s%s\n",
-		n, mcp251xfd_dump_get_tef_obj_addr(priv, n),
-		mcp251xfd_get_ring_head(tef) == n ? "  priv-HEAD" : "",
-		mcp251xfd_dump_get_tef_tail(priv, regs) == n ? "  chip-TAIL" : "",
-		mcp251xfd_get_ring_tail(tef) == n ? "  priv-TAIL" : "",
-		(mcp251xfd_dump_get_tef_tail(priv, regs) == n ?
-		 ((regs->tef.sta & MCP251XFD_REG_TEFSTA_TEFFIF) ? "  chip-FIFO-full" :
-		  !(regs->tef.sta & MCP251XFD_REG_TEFSTA_TEFNEIF) ? "  chip-FIFO-empty" : "") :
-		 ("")),
-		(mcp251xfd_get_ring_head(tef) == mcp251xfd_get_ring_tail(tef) &&
-		 mcp251xfd_get_ring_tail(tef) == n ?
-		 (priv->tef->head == priv->tef->tail ? "  priv-FIFO-empty" : "  priv-FIFO-full") :
-		 ("")));
+	const struct mcp251xfd_hw_tef_obj *hw_tef_obj = hw_obj;
+	const struct mcp251xfd_hw_rx_obj_canfd *hw_rx_obj = hw_obj;
+	const struct mcp251xfd_hw_tx_obj_canfd *hw_tx_obj = hw_obj;
+
+	pr_info("%s-%d Object: "
+		"0x%02x (0x%03x)"
+		"%s%s%s%s%s%s"
+		"\n",
+		get_object_type_str(ring->type), ring->nr,
+		n, mcp251xfd_dump_get_ring_obj_addr(priv, ring, n),
+
+		ring->type != MCP251XFD_DUMP_OBJECT_TYPE_TEF && mcp251xfd_dump_get_chip_head(priv, ring) == n ? "  chip-HEAD" : "",
+		ring->head != MCP251XFD_DUMP_UNKNOWN && mcp251xfd_dump_get_ring_head(priv, ring) == n ? "  ring-HEAD" : "",
+		mcp251xfd_dump_get_chip_tail(priv, ring) == n ? "  chip-TAIL" : "",
+		ring->tail != MCP251XFD_DUMP_UNKNOWN && mcp251xfd_dump_get_ring_tail(priv, ring) == n ? "  ring-TAIL" : "",
+		mcp251xfd_dump_ring_obj_one_fifo_flags_chip(priv, ring, n),
+		mcp251xfd_dump_ring_obj_one_fifo_flags_ring(priv, ring, n)
+		);
 	pr_info("%16s = 0x%08x\n", "id", hw_tef_obj->id);
 	pr_info("%16s = 0x%08x\n", "flags", hw_tef_obj->flags);
-	pr_info("%16s = 0x%08x\n", "ts", hw_tef_obj->ts);
-	__dump_mask(hw_tef_obj->flags, MCP251XFD_OBJ_FLAGS, SEQ, "0x%06lx", "Sequence");
-	pr_info("\n");
-}
 
-static void
-mcp251xfd_dump_ram_tef_obj(const struct mcp251xfd_priv *priv,
-			   const struct mcp251xfd_dump_regs *regs,
-			   const struct mcp251xfd_dump_ram *ram,
-			   const struct mcp251xfd_ring *tef)
-{
-	int i;
+	if (ring->type == MCP251XFD_DUMP_OBJECT_TYPE_TEF ||
+	    ring->type == MCP251XFD_DUMP_OBJECT_TYPE_RX)
+		pr_info("%16s = 0x%08x\n", "ts", hw_tef_obj->ts);
 
-	pr_info("\nTEF Overview:\n");
-	pr_info("%16s =        0x%02x    0x%08x\n", "head (p)",
-		mcp251xfd_get_ring_head(tef),
-		tef->head);
-	pr_info("%16s = 0x%02x   0x%02x    0x%08x\n", "tail (c/p)",
-		mcp251xfd_dump_get_tef_tail(priv, regs),
-		mcp251xfd_get_ring_tail(tef),
-		tef->tail);
-	pr_info("\n");
-
-	for (i = 0; i < mcp251xfd_dump_get_tef_obj_num(priv, regs); i++) {
-		const struct mcp251xfd_hw_tef_obj *hw_tef_obj;
-		u16 hw_tef_obj_rel_addr;
-
-		hw_tef_obj_rel_addr = mcp251xfd_dump_get_tef_obj_rel_addr(priv, i);
-
-		hw_tef_obj = (const struct mcp251xfd_hw_tef_obj *)&ram->ram[hw_tef_obj_rel_addr];
-		mcp251xfd_dump_ram_tef_obj_one(priv, regs, tef, hw_tef_obj, i);
+	if (ring->type == MCP251XFD_DUMP_OBJECT_TYPE_TEF) {
+		__dump_mask(hw_tef_obj->flags, MCP251XFD_OBJ_FLAGS, SEQ, "0x%06lx", "Sequence");
+	} else if (ring->type == MCP251XFD_DUMP_OBJECT_TYPE_TX) {
+		__dump_mask(hw_tx_obj->flags, MCP251XFD_OBJ_FLAGS, SEQ_MCP2517FD, "0x%06lx", "Sequence (MCP2517)");
+		__dump_mask(hw_tx_obj->flags, MCP251XFD_OBJ_FLAGS, SEQ_MCP2518FD, "0x%06lx", "Sequence (MCP2518)");
 	}
-}
 
-/* dump TX */
+	if (ring->type == MCP251XFD_DUMP_OBJECT_TYPE_RX ||
+	    ring->type == MCP251XFD_DUMP_OBJECT_TYPE_TX) {
+		const u8* data;
+		u8 dlc;
 
-static void
-mcp251xfd_dump_ram_tx_obj_one(const struct mcp251xfd_priv *priv,
-			      const struct mcp251xfd_dump_regs *regs,
-			      const struct mcp251xfd_ring *tx,
-			      const struct mcp251xfd_hw_tx_obj_canfd *hw_tx_obj,
-			      u8 n)
-{
-	pr_info("TX Object: 0x%02x (0x%03x)%s%s%s%s%s%s\n",
-		n, mcp251xfd_dump_get_tx_obj_addr(priv, regs, n),
-		mcp251xfd_dump_get_tx_head(priv, regs) == n ? "  chip-HEAD" : "",
-		mcp251xfd_get_ring_head(tx) == n ? "  priv-HEAD" : "",
-		mcp251xfd_dump_get_tx_tail(priv, regs) == n ? "  chip-TAIL" : "",
-		mcp251xfd_get_ring_tail(tx) == n ? "  priv-TAIL" : "",
-		mcp251xfd_dump_get_tx_tail(priv, regs) == n ?
-		(!(regs->tx_fifo.sta & MCP251XFD_REG_FIFOSTA_TFNRFNIF) ? "  chip-FIFO-full" :
-		 (regs->tx_fifo.sta & MCP251XFD_REG_FIFOSTA_TFERFFIF) ? "  chip-FIFO-empty" : "") :
-		(""),
-		(mcp251xfd_get_ring_head(tx) == mcp251xfd_get_ring_tail(tx) &&
-		 mcp251xfd_get_ring_tail(tx) == n ?
-		 (tx->head == tx->tail ? "  priv-FIFO-empty" : "  priv-FIFO-full") :
-		 ("")));
-	pr_info("%16s = 0x%08x\n", "id", hw_tx_obj->id);
-	pr_info("%16s = 0x%08x\n", "flags", hw_tx_obj->flags);
-	__dump_mask(hw_tx_obj->flags, MCP251XFD_OBJ_FLAGS, SEQ_MCP2517FD, "0x%06lx", "Sequence (MCP2517)");
-	__dump_mask(hw_tx_obj->flags, MCP251XFD_OBJ_FLAGS, SEQ_MCP2518FD, "0x%06lx", "Sequence (MCP2518)");
-	mcp251xfd_dump_ram_fifo_obj_data(priv,
-					 hw_tx_obj->data,
-					 FIELD_GET(MCP251XFD_OBJ_FLAGS_DLC, hw_tx_obj->flags));
-	pr_info("\n");
-}
+		if (ring->type == MCP251XFD_DUMP_OBJECT_TYPE_RX)
+			data = hw_rx_obj->data;
+		else
+			data = hw_tx_obj->data;
 
-static void
-mcp251xfd_dump_ram_tx_obj(const struct mcp251xfd_priv *priv,
-			  const struct mcp251xfd_dump_regs *regs,
-			  const struct mcp251xfd_dump_ram *ram,
-			  const struct mcp251xfd_ring *tx)
-{
-	int i;
-
-	pr_info("\nTX Overview:\n");
-	pr_info("%16s = 0x%02x    0x%02x    0x%08x\n", "head (c/p)",
-		mcp251xfd_dump_get_tx_head(priv, regs),
-		mcp251xfd_get_ring_head(tx),
-		tx->head);
-	pr_info("%16s = 0x%02x    0x%02x    0x%08x\n", "tail (c/p)",
-		mcp251xfd_dump_get_tx_tail(priv, regs),
-		mcp251xfd_get_ring_tail(tx),
-		tx->tail);
-	pr_info("\n");
-
-	for (i = 0; i < mcp251xfd_dump_get_tx_obj_num(priv, regs); i++) {
-		const struct mcp251xfd_hw_tx_obj_canfd *hw_tx_obj;
-		u16 hw_tx_obj_rel_addr;
-
-		hw_tx_obj_rel_addr = mcp251xfd_dump_get_tx_obj_rel_addr(priv, regs, i);
-
-		hw_tx_obj = (const struct mcp251xfd_hw_tx_obj_canfd *)&ram->ram[hw_tx_obj_rel_addr];
-		mcp251xfd_dump_ram_tx_obj_one(priv, regs, tx, hw_tx_obj, i);
+		dlc = FIELD_GET(MCP251XFD_OBJ_FLAGS_DLC, hw_rx_obj->flags);
+		mcp251xfd_dump_ring_obj_data(priv, data, dlc);
 	}
-}
 
-/* dump RX */
-
-static void
-mcp251xfd_dump_ram_rx_obj_one(const struct mcp251xfd_priv *priv,
-			      const struct mcp251xfd_dump_regs *regs,
-			      const struct mcp251xfd_ring *rx,
-			      const struct mcp251xfd_hw_rx_obj_canfd *hw_rx_obj,
-			      u8 n)
-{
-	pr_info("RX Object: 0x%02x (0x%03x)%s%s%s%s%s%s\n",
-		n, mcp251xfd_dump_get_rx_obj_addr(priv, regs, n),
-		mcp251xfd_dump_get_rx_head(priv, regs) == n ? "  chip-HEAD" : "",
-		mcp251xfd_get_ring_head(rx) == n ? "  priv-HEAD" : "",
-		mcp251xfd_dump_get_rx_tail(priv, regs) == n ? "  chip-TAIL" : "",
-		mcp251xfd_get_ring_tail(rx) == n ? "  priv-TAIL" : "",
-		mcp251xfd_dump_get_rx_tail(priv, regs) == n ?
-		((regs->rx_fifo.sta & MCP251XFD_REG_FIFOSTA_TFERFFIF) ? "  chip-FIFO-full" :
-		 !(regs->rx_fifo.sta & MCP251XFD_REG_FIFOSTA_TFNRFNIF) ? "  chip-FIFO-empty" : "") :
-		(""),
-		(mcp251xfd_get_ring_head(rx) == mcp251xfd_get_ring_tail(rx) &&
-		 mcp251xfd_get_ring_tail(rx) == n ?
-		 (priv->rx->head == priv->rx->tail ? "  priv-FIFO-empty" : "  priv-FIFO-full") :
-		 ("")));
-	pr_info("%16s = 0x%08x\n", "id", hw_rx_obj->id);
-	pr_info("%16s = 0x%08x\n", "flags", hw_rx_obj->flags);
-	pr_info("%16s = 0x%08x\n", "ts", hw_rx_obj->ts);
-	mcp251xfd_dump_ram_fifo_obj_data(priv, hw_rx_obj->data, FIELD_GET(MCP251XFD_OBJ_FLAGS_DLC, hw_rx_obj->flags));
 	pr_info("\n");
 }
 
 static void
-mcp251xfd_dump_ram_rx_obj(const struct mcp251xfd_priv *priv,
-			  const struct mcp251xfd_dump_regs *regs,
-			  const struct mcp251xfd_dump_ram *ram,
-			  const struct mcp251xfd_ring *rx)
+mcp251xfd_dump_ring(const struct mcp251xfd_priv *priv,
+		    const struct mcp251xfd_ring *ring,
+		    const struct mcp251xfd_dump_regs *regs)
 {
 	int i;
 
-	pr_info("\nRX Overview:\n");
-	pr_info("%16s = 0x%02x    0x%02x    0x%08x\n", "head (c/p)",
-		mcp251xfd_dump_get_rx_head(priv, regs),
-		mcp251xfd_get_ring_head(rx), rx->head);
-	pr_info("%16s = 0x%02x    0x%02x    0x%08x\n", "tail (c/p)",
-		mcp251xfd_dump_get_rx_tail(priv, regs),
-		mcp251xfd_get_ring_tail(rx), rx->tail);
+	pr_info("\n%s-%d FIFO %d Overview:\n",
+		get_object_type_str(ring->type), ring->nr, ring->fifo_nr);
+
+	if (ring->type == MCP251XFD_DUMP_OBJECT_TYPE_TEF) {
+		if (ring->head == MCP251XFD_DUMP_UNKNOWN)
+			pr_info("%16s\n", "head ( / )");
+		else
+			pr_info("%16s =         0x%02x    0x%08x\n", "head ( /r)",
+				mcp251xfd_dump_get_ring_head(priv, ring),
+				ring->head);
+	} else {
+		if (ring->head == MCP251XFD_DUMP_UNKNOWN)
+			pr_info("%16s = 0x%02x\n", "head (c/ )",
+			mcp251xfd_dump_get_chip_head(priv, ring));
+		else
+			pr_info("%16s = 0x%02x    0x%02x    0x%08x\n", "head (c/r)",
+			mcp251xfd_dump_get_chip_head(priv, ring),
+			mcp251xfd_dump_get_ring_head(priv, ring),
+			ring->head);
+	}
+
+	if (ring->tail == MCP251XFD_DUMP_UNKNOWN)
+		pr_info("%16s = 0x%02x\n", "tail (c/ )",
+			mcp251xfd_dump_get_chip_tail(priv, ring));
+	else
+		pr_info("%16s = 0x%02x    0x%02x    0x%08x\n", "tail (c/r)",
+			mcp251xfd_dump_get_chip_tail(priv, ring),
+			mcp251xfd_dump_get_ring_tail(priv, ring),
+			ring->tail);
+
 	pr_info("\n");
 
-	for (i = 0; i < mcp251xfd_dump_get_rx_obj_num(priv, regs); i++) {
-		const struct mcp251xfd_hw_rx_obj_canfd *hw_rx_obj;
-		u16 hw_rx_obj_rel_addr;
+	for (i = 0; i < ring->obj_num; i++) {
+		void *hw_obj;
 
-		hw_rx_obj_rel_addr = mcp251xfd_dump_get_rx_obj_rel_addr(priv, regs, i);
-		hw_rx_obj = (const struct mcp251xfd_hw_rx_obj_canfd *)&ram->ram[hw_rx_obj_rel_addr];
-
-		mcp251xfd_dump_ram_rx_obj_one(priv, regs, rx, hw_rx_obj, i);
+		hw_obj = mcp251xfd_dump_get_ring_hw_obj(priv, ring, i);
+		mcp251xfd_dump_ring_obj_one(priv, ring, hw_obj, i);
 	}
 }
 
 #undef __dump_mask
 #undef __dump_bit
 
-static void mcp251xfd_dump_ram(const struct mcp251xfd_priv *priv, const struct mcp251xfd_dump_regs *regs, const struct mcp251xfd_dump_ram *ram)
+static void
+mcp251xfd_dump_ram(const struct mcp251xfd_priv *priv,
+		   const struct mcp251xfd_dump_regs *regs,
+		   const struct mcp251xfd_dump_ram *ram)
 {
+	unsigned int i;
+
 	netdev_info(priv->ndev, "----------------------- RAM dump ----------------------\n");
-	mcp251xfd_dump_ram_tef_obj(priv, regs, ram, priv->tef);
-	mcp251xfd_dump_ram_tx_obj(priv, regs, ram, priv->tx);
-	mcp251xfd_dump_ram_rx_obj(priv, regs, ram, priv->rx);
+
+	for (i = 0; i < ARRAY_SIZE(regs->fifo); i++) {
+		const struct mcp251xfd_ring *ring = &priv->ring[i];
+
+		switch (ring->type) {
+		case MCP251XFD_DUMP_OBJECT_TYPE_TEF:
+		case MCP251XFD_DUMP_OBJECT_TYPE_RX:
+		case MCP251XFD_DUMP_OBJECT_TYPE_TX:
+			mcp251xfd_dump_ring(priv, ring, regs);
+		default:
+			break;
+		}
+	}
+
 	netdev_info(priv->ndev, "------------------------- end -------------------------\n");
 }
 
@@ -877,6 +884,7 @@ void mcp251xfd_dump(struct mcp251xfd_priv *priv)
 	if (err)
 		return;
 
+	mcp251xfd_dump_analyze_regs_and_ram(priv, &regs, &ram);
 	mcp251xfd_dump_regs(priv, &regs, &regs_mcp251xfd);
 	mcp251xfd_dump_ram(priv, &regs, &ram);
 }
diff --git a/mcp251xfd/mcp251xfd-main.c b/mcp251xfd/mcp251xfd-main.c
index 4acd548..4e8273f 100644
--- a/mcp251xfd/mcp251xfd-main.c
+++ b/mcp251xfd/mcp251xfd-main.c
@@ -45,6 +45,17 @@ int regmap_bulk_read(struct regmap *map, unsigned int reg,
 	return 0;
 }
 
+void mcp251xfd_dump_ring_init(struct mcp251xfd_ring *ring)
+{
+	memset(ring, 0x0, sizeof(*ring));
+
+	ring->type = MCP251XFD_DUMP_UNKNOWN;
+	ring->head = MCP251XFD_DUMP_UNKNOWN;
+	ring->tail = MCP251XFD_DUMP_UNKNOWN;
+	ring->nr = (uint8_t)MCP251XFD_DUMP_UNKNOWN;
+	ring->fifo_nr = (uint8_t)MCP251XFD_DUMP_UNKNOWN;
+}
+
 int main(int argc, char *argv[])
 {
 	struct mcp251xfd_mem mem = { };
@@ -55,6 +66,7 @@ int main(int argc, char *argv[])
 		.map = &map,
 	};
 	const char *file_path;
+	unsigned int i;
 	int opt, err;
 
 	struct option long_options[] = {
@@ -83,6 +95,9 @@ int main(int argc, char *argv[])
 		exit(EXIT_FAILURE);
 	}
 
+	for (i = 0; i < ARRAY_SIZE(priv.ring); i++)
+		mcp251xfd_dump_ring_init(&priv.ring[i]);
+
 	err = mcp251xfd_dev_coredump_read(&priv, &mem, file_path);
 	if (err)
 		err = mcp251xfd_regmap_read(&priv, &mem, file_path);