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bnxt_en: Add support to collect crash dump via ethtool 

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>
This commit is contained in:
Vasundhara Volam 2019-10-31 15:38:52 +05:30 committed by David S. Miller
parent e07ab2021e
commit 0b0eacf3c8
3 changed files with 40 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/ethernet/broadcom/bnxt/bnxt.h
View File

@ -1807,6 +1807,9 @@ struct bnxt {
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;

37
drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
View File

@ -3311,6 +3311,24 @@ err:
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 @@ static int bnxt_get_dump_flag(struct net_device *dev, struct ethtool_dump *dump)
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 @@ static int bnxt_get_dump_data(struct net_device *dev, struct ethtool_dump *dump,
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 @@ const struct ethtool_ops bnxt_ethtool_ops = {
.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,
};

2
drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.h
View File

@ -59,6 +59,8 @@ struct hwrm_dbg_cmn_output {
#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 | \