From 7a13240e371891d90cd51e3ea55ea04f4b2065dc Mon Sep 17 00:00:00 2001 From: Edwin Peer Date: Mon, 4 May 2020 04:50:33 -0400 Subject: [PATCH] bnxt_en: fix ethtool_reset_flags ABI violations The ethtool ABI specifies that the reset operation should only clear the flags that were actually reset. Setting the flags to zero after a chip reset violates this because it does not include resetting the application processor complex. Similarly, components that are not yet defined are also not necessarily being reset. The fact that chip reset does not cover the AP also means that it is inappropriate to treat these two components exclusively of one another. The ABI provides a mechanism to report a failure to reset independent components via the returned bitmask, so it is also wrong to fail hard if one of a set of independent resets is not possible. It is incorrect to rely on the passed by reference flags in bnxt_reset(), which are being updated as components are reset. The initially requested value should be used instead so that hard errors do not propagate if any earlier components could have been reset successfully. Note, AP and chip resets are global in nature. Dedicated resets are thus not currently supported. Signed-off-by: Edwin Peer Signed-off-by: Michael Chan Signed-off-by: David S. Miller --- .../net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 51 ++++++++++--------- .../net/ethernet/broadcom/bnxt/bnxt_ethtool.h | 8 ++- 2 files changed, 33 insertions(+), 26 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c index d99da82b6eff..9937c216aa48 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c @@ -2999,7 +2999,10 @@ static void bnxt_self_test(struct net_device *dev, struct ethtool_test *etest, static int bnxt_reset(struct net_device *dev, u32 *flags) { struct bnxt *bp = netdev_priv(dev); - int rc = 0; + u32 req = *flags; + + if (!req) + return -EINVAL; if (!BNXT_PF(bp)) { netdev_err(dev, "Reset is not supported from a VF\n"); @@ -3013,33 +3016,33 @@ static int bnxt_reset(struct net_device *dev, u32 *flags) return -EBUSY; } - if (*flags == ETH_RESET_ALL) { + if ((req & BNXT_FW_RESET_CHIP) == BNXT_FW_RESET_CHIP) { /* This feature is not supported in older firmware versions */ - if (bp->hwrm_spec_code < 0x10803) - return -EOPNOTSUPP; - - rc = bnxt_firmware_reset_chip(dev); - if (!rc) { - netdev_info(dev, "Reset request successful.\n"); - if (!(bp->fw_cap & BNXT_FW_CAP_HOT_RESET)) - netdev_info(dev, "Reload driver to complete reset\n"); - *flags = 0; + if (bp->hwrm_spec_code >= 0x10803) { + if (!bnxt_firmware_reset_chip(dev)) { + netdev_info(dev, "Firmware reset request successful.\n"); + if (!(bp->fw_cap & BNXT_FW_CAP_HOT_RESET)) + netdev_info(dev, "Reload driver to complete reset\n"); + *flags &= ~BNXT_FW_RESET_CHIP; + } + } else if (req == BNXT_FW_RESET_CHIP) { + return -EOPNOTSUPP; /* only request, fail hard */ } - } else if (*flags == ETH_RESET_AP) { - /* This feature is not supported in older firmware versions */ - if (bp->hwrm_spec_code < 0x10803) - return -EOPNOTSUPP; - - rc = bnxt_firmware_reset_ap(dev); - if (!rc) { - netdev_info(dev, "Reset Application Processor request successful.\n"); - *flags = 0; - } - } else { - rc = -EINVAL; } - return rc; + if (req & BNXT_FW_RESET_AP) { + /* This feature is not supported in older firmware versions */ + if (bp->hwrm_spec_code >= 0x10803) { + if (!bnxt_firmware_reset_ap(dev)) { + netdev_info(dev, "Reset application processor successful.\n"); + *flags &= ~BNXT_FW_RESET_AP; + } + } else if (req == BNXT_FW_RESET_AP) { + return -EOPNOTSUPP; /* only request, fail hard */ + } + } + + return 0; } static int bnxt_hwrm_dbg_dma_data(struct bnxt *bp, void *msg, int msg_len, diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.h index 3576d951727b..ce7585ff9e4d 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.h @@ -77,8 +77,12 @@ struct hwrm_dbg_cmn_output { #define BNXT_LED_DFLT_ENABLES(x) \ cpu_to_le32(BNXT_LED_DFLT_ENA << (BNXT_LED_DFLT_ENA_SHIFT * (x))) -#define BNXT_FW_RESET_AP 0xfffe -#define BNXT_FW_RESET_CHIP 0xffff +#define BNXT_FW_RESET_AP (ETH_RESET_AP << ETH_RESET_SHARED_SHIFT) +#define BNXT_FW_RESET_CHIP ((ETH_RESET_MGMT | ETH_RESET_IRQ | \ + ETH_RESET_DMA | ETH_RESET_FILTER | \ + ETH_RESET_OFFLOAD | ETH_RESET_MAC | \ + ETH_RESET_PHY | ETH_RESET_RAM) \ + << ETH_RESET_SHARED_SHIFT) extern const struct ethtool_ops bnxt_ethtool_ops;