New upstream version 16.11.4

[deb_dpdk.git] / drivers / net / mlx5 / mlx5_ethdev.c

diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index ca981a5..2ea995f 100644 (file)
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -49,6 +49,7 @@
 #include <linux/sockios.h>
 #include <linux/version.h>
 #include <fcntl.h>
+#include <stdalign.h>
 
 /* DPDK headers don't like -pedantic. */
 #ifdef PEDANTIC
@@ -119,7 +120,6 @@ struct ethtool_link_settings {
 #define ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT 38
 #define ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT 39
 #endif
-#define ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NU32 (SCHAR_MAX)
 
 /**
  * Return private structure associated with an Ethernet device.
@@ -755,12 +755,7 @@ static int
 mlx5_link_update_unlocked_gs(struct rte_eth_dev *dev, int wait_to_complete)
 {
        struct priv *priv = mlx5_get_priv(dev);
-       __extension__ struct {
-               struct ethtool_link_settings edata;
-               uint32_t link_mode_data[3 *
-                                       ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NU32];
-       } ecmd;
-
+       struct ethtool_link_settings gcmd = { .cmd = ETHTOOL_GLINKSETTINGS };
        struct ifreq ifr;
        struct rte_eth_link dev_link;
        uint64_t sc;
@@ -773,59 +768,65 @@ mlx5_link_update_unlocked_gs(struct rte_eth_dev *dev, int wait_to_complete)
        memset(&dev_link, 0, sizeof(dev_link));
        dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
                                (ifr.ifr_flags & IFF_RUNNING));
-       memset(&ecmd, 0, sizeof(ecmd));
-       ecmd.edata.cmd = ETHTOOL_GLINKSETTINGS;
-       ifr.ifr_data = (void *)&ecmd;
+       ifr.ifr_data = (void *)&gcmd;
        if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
                DEBUG("ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS) failed: %s",
                      strerror(errno));
                return -1;
        }
-       ecmd.edata.link_mode_masks_nwords = -ecmd.edata.link_mode_masks_nwords;
+       gcmd.link_mode_masks_nwords = -gcmd.link_mode_masks_nwords;
+
+       alignas(struct ethtool_link_settings)
+       uint8_t data[offsetof(struct ethtool_link_settings, link_mode_masks) +
+                    sizeof(uint32_t) * gcmd.link_mode_masks_nwords * 3];
+       struct ethtool_link_settings *ecmd = (void *)data;
+
+       *ecmd = gcmd;
+       ifr.ifr_data = (void *)ecmd;
        if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
                DEBUG("ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS) failed: %s",
                      strerror(errno));
                return -1;
        }
-       dev_link.link_speed = ecmd.edata.speed;
-       sc = ecmd.edata.link_mode_masks[0] |
-               ((uint64_t)ecmd.edata.link_mode_masks[1] << 32);
+       dev_link.link_speed = ecmd->speed;
+       sc = ecmd->link_mode_masks[0] |
+               ((uint64_t)ecmd->link_mode_masks[1] << 32);
        priv->link_speed_capa = 0;
-       if (sc & ETHTOOL_LINK_MODE_Autoneg_BIT)
+       if (sc & MLX5_BITSHIFT(ETHTOOL_LINK_MODE_Autoneg_BIT))
                priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
-       if (sc & (ETHTOOL_LINK_MODE_1000baseT_Full_BIT |
-                 ETHTOOL_LINK_MODE_1000baseKX_Full_BIT))
+       if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseT_Full_BIT) |
+                 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT)))
                priv->link_speed_capa |= ETH_LINK_SPEED_1G;
-       if (sc & (ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT |
-                 ETHTOOL_LINK_MODE_10000baseKR_Full_BIT |
-                 ETHTOOL_LINK_MODE_10000baseR_FEC_BIT))
+       if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT) |
+                 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT) |
+                 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT)))
                priv->link_speed_capa |= ETH_LINK_SPEED_10G;
-       if (sc & (ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT |
-                 ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT))
+       if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT) |
+                 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT)))
                priv->link_speed_capa |= ETH_LINK_SPEED_20G;
-       if (sc & (ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT |
-                 ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT |
-                 ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT |
-                 ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT))
+       if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT) |
+                 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT) |
+                 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT) |
+                 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT)))
                priv->link_speed_capa |= ETH_LINK_SPEED_40G;
-       if (sc & (ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT |
-                 ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT |
-                 ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT |
-                 ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT))
+       if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT) |
+                 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT) |
+                 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT) |
+                 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT)))
                priv->link_speed_capa |= ETH_LINK_SPEED_56G;
-       if (sc & (ETHTOOL_LINK_MODE_25000baseCR_Full_BIT |
-                 ETHTOOL_LINK_MODE_25000baseKR_Full_BIT |
-                 ETHTOOL_LINK_MODE_25000baseSR_Full_BIT))
+       if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseCR_Full_BIT) |
+                 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT) |
+                 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseSR_Full_BIT)))
                priv->link_speed_capa |= ETH_LINK_SPEED_25G;
-       if (sc & (ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT |
-                 ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT))
+       if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT) |
+                 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT)))
                priv->link_speed_capa |= ETH_LINK_SPEED_50G;
-       if (sc & (ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT |
-                 ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT |
-                 ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT |
-                 ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT))
+       if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT) |
+                 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT) |
+                 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT) |
+                 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT)))
                priv->link_speed_capa |= ETH_LINK_SPEED_100G;
-       dev_link.link_duplex = ((ecmd.edata.duplex == DUPLEX_HALF) ?
+       dev_link.link_duplex = ((ecmd->duplex == DUPLEX_HALF) ?
                                ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
        dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
                                  ETH_LINK_SPEED_FIXED);