mlx4: Wake on LAN support

The driver queries the FW for WOL support.
Ethtool get/set_wol is implemented accordingly.
Only magic packets are supported at the time.

Signed-off-by: Igor Yarovinsky <igory@mellanox.co.il>
Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 89 insertions, 2 deletions

diff --git a/drivers/net/mlx4/en_ethtool.c b/drivers/net/mlx4/en_ethtool.c
index 8cfe8586ed2d..c1f351f6ae57 100644
--- a/drivers/net/mlx4/en_ethtool.c
+++ b/drivers/net/mlx4/en_ethtool.c
@@ -131,8 +131,65 @@ static void mlx4_en_set_msglevel(struct net_device *dev, u32 val)
 static void mlx4_en_get_wol(struct net_device *netdev,
                             struct ethtool_wolinfo *wol)
 {
-        wol->supported = 0;
-        wol->wolopts = 0;
+        struct mlx4_en_priv *priv = netdev_priv(netdev);
+        int err = 0;
+        u64 config = 0;
+
+        if (!priv->mdev->dev->caps.wol) {
+                wol->supported = 0;
+                wol->wolopts = 0;
+                return;
+        }
+
+        err = mlx4_wol_read(priv->mdev->dev, &config, priv->port);
+        if (err) {
+                en_err(priv, "Failed to get WoL information\n");
+                return;
+        }
+
+        if (config & MLX4_EN_WOL_MAGIC)
+                wol->supported = WAKE_MAGIC;
+        else
+                wol->supported = 0;
+
+        if (config & MLX4_EN_WOL_ENABLED)
+                wol->wolopts = WAKE_MAGIC;
+        else
+                wol->wolopts = 0;
+}
+
+static int mlx4_en_set_wol(struct net_device *netdev,
+                            struct ethtool_wolinfo *wol)
+{
+        struct mlx4_en_priv *priv = netdev_priv(netdev);
+        u64 config = 0;
+        int err = 0;
+
+        if (!priv->mdev->dev->caps.wol)
+                return -EOPNOTSUPP;
+
+        if (wol->supported & ~WAKE_MAGIC)
+                return -EINVAL;
+
+        err = mlx4_wol_read(priv->mdev->dev, &config, priv->port);
+        if (err) {
+                en_err(priv, "Failed to get WoL info, unable to modify\n");
+                return err;
+        }
+
+        if (wol->wolopts & WAKE_MAGIC) {
+                config |= MLX4_EN_WOL_DO_MODIFY | MLX4_EN_WOL_ENABLED |
+                                MLX4_EN_WOL_MAGIC;
+        } else {
+                config &= ~(MLX4_EN_WOL_ENABLED | MLX4_EN_WOL_MAGIC);
+                config |= MLX4_EN_WOL_DO_MODIFY;
+        }
+
+        err = mlx4_wol_write(priv->mdev->dev, config, priv->port);
+        if (err)
+                en_err(priv, "Failed to set WoL information\n");
+
+        return err;
 }
 
 static int mlx4_en_get_sset_count(struct net_device *dev, int sset)
@@ -442,6 +499,7 @@ const struct ethtool_ops mlx4_en_ethtool_ops = {
         .get_ethtool_stats = mlx4_en_get_ethtool_stats,
         .self_test = mlx4_en_self_test,
         .get_wol = mlx4_en_get_wol,
+        .set_wol = mlx4_en_set_wol,
         .get_msglevel = mlx4_en_get_msglevel,
         .set_msglevel = mlx4_en_set_msglevel,
         .get_coalesce = mlx4_en_get_coalesce,
diff --git a/drivers/net/mlx4/fw.c b/drivers/net/mlx4/fw.c
index 5de1db897835..fd1c51b6197a 100644
--- a/drivers/net/mlx4/fw.c
+++ b/drivers/net/mlx4/fw.c
@@ -276,6 +276,7 @@ int mlx4_QUERY_DEV_CAP(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
         dev_cap->udp_rss = field & 0x1;
         MLX4_GET(field, outbox, QUERY_DEV_CAP_ETH_UC_LOOPBACK_OFFSET);
         dev_cap->loopback_support = field & 0x1;
+        dev_cap->wol = field & 0x40;
         MLX4_GET(dev_cap->flags, outbox, QUERY_DEV_CAP_FLAGS_OFFSET);
         MLX4_GET(field, outbox, QUERY_DEV_CAP_RSVD_UAR_OFFSET);
         dev_cap->reserved_uars = field >> 4;
@@ -908,3 +909,22 @@ int mlx4_NOP(struct mlx4_dev *dev)
         /* Input modifier of 0x1f means "finish as soon as possible." */
         return mlx4_cmd(dev, 0, 0x1f, 0, MLX4_CMD_NOP, 100);
 }
+
+#define MLX4_WOL_SETUP_MODE (5 << 28)
+int mlx4_wol_read(struct mlx4_dev *dev, u64 *config, int port)
+{
+        u32 in_mod = MLX4_WOL_SETUP_MODE | port << 8;
+
+        return mlx4_cmd_imm(dev, 0, config, in_mod, 0x3,
+                            MLX4_CMD_MOD_STAT_CFG, MLX4_CMD_TIME_CLASS_A);
+}
+EXPORT_SYMBOL_GPL(mlx4_wol_read);
+
+int mlx4_wol_write(struct mlx4_dev *dev, u64 config, int port)
+{
+        u32 in_mod = MLX4_WOL_SETUP_MODE | port << 8;
+
+        return mlx4_cmd(dev, config, in_mod, 0x1, MLX4_CMD_MOD_STAT_CFG,
+                                        MLX4_CMD_TIME_CLASS_A);
+}
+EXPORT_SYMBOL_GPL(mlx4_wol_write);
diff --git a/drivers/net/mlx4/fw.h b/drivers/net/mlx4/fw.h
index 65cc72eb899d..f7b9cc2d1b2a 100644
--- a/drivers/net/mlx4/fw.h
+++ b/drivers/net/mlx4/fw.h
@@ -80,6 +80,7 @@ struct mlx4_dev_cap {
         u16 stat_rate_support;
         int udp_rss;
         int loopback_support;
+        int wol;
         u32 flags;
         int reserved_uars;
         int uar_size;
diff --git a/drivers/net/mlx4/main.c b/drivers/net/mlx4/main.c
index 517ca34f5b37..42d4fb477870 100644
--- a/drivers/net/mlx4/main.c
+++ b/drivers/net/mlx4/main.c
@@ -227,6 +227,7 @@ static int mlx4_dev_cap(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
         dev->caps.stat_rate_support  = dev_cap->stat_rate_support;
         dev->caps.udp_rss            = dev_cap->udp_rss;
         dev->caps.loopback_support   = dev_cap->loopback_support;
+        dev->caps.wol                = dev_cap->wol;
         dev->caps.max_gso_sz         = dev_cap->max_gso_sz;
 
         dev->caps.log_num_macs  = log_num_mac;
diff --git a/drivers/net/mlx4/mlx4_en.h b/drivers/net/mlx4/mlx4_en.h
index 2db245fcd84b..07aea8d0beeb 100644
--- a/drivers/net/mlx4/mlx4_en.h
+++ b/drivers/net/mlx4/mlx4_en.h
@@ -479,6 +479,13 @@ struct mlx4_en_priv {
         int mc_addrs_cnt;
         struct mlx4_en_stat_out_mbox hw_stats;
         int vids[128];
+        bool wol;
+};
+
+enum mlx4_en_wol {
+        MLX4_EN_WOL_MAGIC = (1ULL << 61),
+        MLX4_EN_WOL_ENABLED = (1ULL << 62),
+        MLX4_EN_WOL_DO_MODIFY = (1ULL << 63),
 };