From 36a2341eb0c9dbff43d31d3ed2ac50acd1b56b47 Mon Sep 17 00:00:00 2001
From: Jonathan Toppins <jtoppins@redhat.com>
Date: Fri, 6 Dec 2019 20:12:48 -0500
Subject: [PATCH 92/96] [netdrv] bnxt_en: Add support to collect crash dump via
ethtool
Message-id: <cb065cce89746b909d8b6c83587e9bb55465950c.1575651772.git.jtoppins@redhat.com>
Patchwork-id: 291386
O-Subject: [PATCH rhel8 08/13] bnxt_en: Add support to collect crash dump via ethtool
Bugzilla: 1773724
RH-Acked-by: Steve Best <sbest@redhat.com>
RH-Acked-by: David Arcari <darcari@redhat.com>
RH-Acked-by: Jarod Wilson <jarod@redhat.com>
RH-Acked-by: John Linville <linville@redhat.com>
Driver supports 2 types of core dumps.
1. Live dump - Firmware dump when system is up and running.
2. Crash dump - Dump which is collected during firmware crash
that can be retrieved after recovery.
Crash dump is currently supported only on specific 58800 chips
which can be retrieved using OP-TEE API only, as firmware cannot
access this region directly.
User needs to set the dump flag using following command before
initiating the dump collection:
$ ethtool -W|--set-dump eth0 N
Where N is "0" for live dump and "1" for crash dump
Command to collect the dump after setting the flag:
$ ethtool -w eth0 data Filename
v3: Modify set_dump to support even when CONFIG_TEE_BNXT_FW=n.
Also change log message to netdev_info().
Cc: Jakub Kicinski <jakub.kicinski@netronome.com>
Cc: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Sheetal Tigadoli <sheetal.tigadoli@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 0b0eacf3c83cb292c6eef55c76d5138c9302dc20)
Bugzilla: 1773724
Build Info: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=25154853
Tested: simple boot test
Signed-off-by: Jonathan Toppins <jtoppins@redhat.com>
Signed-off-by: Bruno Meneguele <bmeneg@redhat.com>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.h | 3 ++
drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 37 +++++++++++++++++++++--
drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.h | 2 ++
3 files changed, 40 insertions(+), 2 deletions(-)
Index: src/drivers/net/ethernet/broadcom/bnxt/bnxt.h
===================================================================
--- src.orig/drivers/net/ethernet/broadcom/bnxt/bnxt.h 2020-02-06 16:23:22.576450128 +0100
+++ src/drivers/net/ethernet/broadcom/bnxt/bnxt.h 2020-02-06 16:23:22.708448916 +0100
@@ -1807,6 +1807,9 @@
u8 num_leds;
struct bnxt_led_info leds[BNXT_MAX_LED];
+ u16 dump_flag;
+#define BNXT_DUMP_LIVE 0
+#define BNXT_DUMP_CRASH 1
struct bpf_prog *xdp_prog;
Index: src/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
===================================================================
--- src.orig/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c 2020-02-06 16:23:21.412460813 +0100
+++ src/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c 2020-02-06 16:23:22.709448907 +0100
@@ -3311,6 +3311,24 @@
return rc;
}
+static int bnxt_set_dump(struct net_device *dev, struct ethtool_dump *dump)
+{
+ struct bnxt *bp = netdev_priv(dev);
+
+ if (dump->flag > BNXT_DUMP_CRASH) {
+ netdev_info(dev, "Supports only Live(0) and Crash(1) dumps.\n");
+ return -EINVAL;
+ }
+
+ if (!IS_ENABLED(CONFIG_TEE_BNXT_FW) && dump->flag == BNXT_DUMP_CRASH) {
+ netdev_info(dev, "Cannot collect crash dump as TEE_BNXT_FW config option is not enabled.\n");
+ return -EOPNOTSUPP;
+ }
+
+ bp->dump_flag = dump->flag;
+ return 0;
+}
+
static int bnxt_get_dump_flag(struct net_device *dev, struct ethtool_dump *dump)
{
struct bnxt *bp = netdev_priv(dev);
@@ -3323,7 +3341,12 @@
bp->ver_resp.hwrm_fw_bld_8b << 8 |
bp->ver_resp.hwrm_fw_rsvd_8b;
- return bnxt_get_coredump(bp, NULL, &dump->len);
+ dump->flag = bp->dump_flag;
+ if (bp->dump_flag == BNXT_DUMP_CRASH)
+ dump->len = BNXT_CRASH_DUMP_LEN;
+ else
+ bnxt_get_coredump(bp, NULL, &dump->len);
+ return 0;
}
static int bnxt_get_dump_data(struct net_device *dev, struct ethtool_dump *dump,
@@ -3336,7 +3359,16 @@
memset(buf, 0, dump->len);
- return bnxt_get_coredump(bp, buf, &dump->len);
+ dump->flag = bp->dump_flag;
+ if (dump->flag == BNXT_DUMP_CRASH) {
+#ifdef CONFIG_TEE_BNXT_FW
+ return tee_bnxt_copy_coredump(buf, 0, dump->len);
+#endif
+ } else {
+ return bnxt_get_coredump(bp, buf, &dump->len);
+ }
+
+ return 0;
}
void bnxt_ethtool_init(struct bnxt *bp)
@@ -3446,6 +3478,7 @@
.set_phys_id = bnxt_set_phys_id,
.self_test = bnxt_self_test,
.reset = bnxt_reset,
+ .set_dump = bnxt_set_dump,
.get_dump_flag = bnxt_get_dump_flag,
.get_dump_data = bnxt_get_dump_data,
};
Index: src/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.h
===================================================================
--- src.orig/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.h 2020-02-06 16:22:53.098720710 +0100
+++ src/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.h 2020-02-06 16:23:22.709448907 +0100
@@ -59,6 +59,8 @@
#define HWRM_DBG_CMN_FLAGS_MORE 1
};
+#define BNXT_CRASH_DUMP_LEN (8 << 20)
+
#define BNXT_LED_DFLT_ENA \
(PORT_LED_CFG_REQ_ENABLES_LED0_ID | \
PORT_LED_CFG_REQ_ENABLES_LED0_STATE | \