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Date: Thu, 24 Oct 2019 11:02:41 +0530 From: Sheetal Tigadoli <sheetal.tigadoli@...adcom.com> To: Rafał Miłecki <zajec5@...il.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Michal Simek <michal.simek@...inx.com>, Rajan Vaja <rajan.vaja@...inx.com>, Scott Branden <scott.branden@...adcom.com>, Ray Jui <ray.jui@...adcom.com>, Vikram Prakash <vikram.prakash@...adcom.com>, Jens Wiklander <jens.wiklander@...aro.org>, Michael Chan <michael.chan@...adcom.com>, "David S. Miller" <davem@...emloft.net>, Vikas Gupta <vikas.gupta@...adcom.com>, Vasundhara Volam <vasundhara-v.volam@...adcom.com> Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, tee-dev@...ts.linaro.org, bcm-kernel-feedback-list@...adcom.com, netdev@...r.kernel.org, Jakub Kicinski <jakub.kicinski@...ronome.com>, Sheetal Tigadoli <sheetal.tigadoli@...adcom.com> Subject: [PATCH V3 3/3] bnxt_en: Add support to collect crash dump via ethtool From: Vasundhara Volam <vasundhara-v.volam@...adcom.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@...ronome.com> Cc: Michael Chan <michael.chan@...adcom.com> Signed-off-by: Vasundhara Volam <vasundhara-v.volam@...adcom.com> Signed-off-by: Sheetal Tigadoli <sheetal.tigadoli@...adcom.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(-) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h index 0943715..3e7d1fb 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h @@ -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; diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c index 51c1404..f2220b8 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c @@ -3311,6 +3311,24 @@ static int bnxt_get_coredump(struct bnxt *bp, void *buf, u32 *dump_len) 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 @@ void bnxt_ethtool_free(struct bnxt *bp) .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, }; diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.h index b5b65b3..01de7e7 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.h @@ -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 | \ -- 1.9.1
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