mlx4_en: Add driver for Mellanox ConnectX 10GbE NIC

The Mellanox ConnectX can operate as an InfiniBand adapter, as an
Ethernet NIC, or as a Fibre Channel (FC) HBA.  The kernel has a
low-level driver, mlx4_core, which handles multiplexing access to the
device, and there is also already an InfiniBad driver, mlx4_ib.

This patch adds a new driver, mlx4_en, which implements a standard
Ethernet NIC driver.

Signed-off-by: Liran Liss <liranl@mellanox.co.il>
Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 480 insertions, 0 deletions

diff --git a/drivers/net/mlx4/en_params.c b/drivers/net/mlx4/en_params.c
new file mode 100644
index 000000000000..c2e69b1bcd0a
--- /dev/null
+++ b/drivers/net/mlx4/en_params.c
@@ -0,0 +1,480 @@
+/*
+ * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/ethtool.h>
+#include <linux/netdevice.h>
+
+#include "mlx4_en.h"
+#include "en_port.h"
+
+#define MLX4_EN_PARM_INT(X, def_val, desc) \
+        static unsigned int X = def_val;\
+        module_param(X , uint, 0444); \
+        MODULE_PARM_DESC(X, desc);
+
+
+/*
+ * Device scope module parameters
+ */
+
+
+/* Use a XOR rathern than Toeplitz hash function for RSS */
+MLX4_EN_PARM_INT(rss_xor, 0, "Use XOR hash function for RSS");
+
+/* RSS hash type mask - default to <saddr, daddr, sport, dport> */
+MLX4_EN_PARM_INT(rss_mask, 0xf, "RSS hash type bitmask");
+
+/* Number of LRO sessions per Rx ring (rounded up to a power of two) */
+MLX4_EN_PARM_INT(num_lro, MLX4_EN_MAX_LRO_DESCRIPTORS,
+                 "Number of LRO sessions per ring or disabled (0)");
+
+/* Priority pausing */
+MLX4_EN_PARM_INT(pptx, MLX4_EN_DEF_TX_PAUSE,
+                 "Pause policy on TX: 0 never generate pause frames "
+                 "1 generate pause frames according to RX buffer threshold");
+MLX4_EN_PARM_INT(pprx, MLX4_EN_DEF_RX_PAUSE,
+                 "Pause policy on RX: 0 ignore received pause frames "
+                 "1 respect received pause frames");
+MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."
+                           " Per priority bit mask");
+MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]."
+                           " Per priority bit mask");
+
+/* Interrupt moderation tunning */
+MLX4_EN_PARM_INT(rx_moder_cnt, MLX4_EN_AUTO_CONF,
+               "Max coalesced descriptors for Rx interrupt moderation");
+MLX4_EN_PARM_INT(rx_moder_time, MLX4_EN_AUTO_CONF,
+               "Timeout following last packet for Rx interrupt moderation");
+MLX4_EN_PARM_INT(auto_moder, 1, "Enable dynamic interrupt moderation");
+
+MLX4_EN_PARM_INT(rx_ring_num1, 0, "Number or Rx rings for port 1 (0 = #cores)");
+MLX4_EN_PARM_INT(rx_ring_num2, 0, "Number or Rx rings for port 2 (0 = #cores)");
+
+MLX4_EN_PARM_INT(tx_ring_size1, MLX4_EN_AUTO_CONF, "Tx ring size for port 1");
+MLX4_EN_PARM_INT(tx_ring_size2, MLX4_EN_AUTO_CONF, "Tx ring size for port 2");
+MLX4_EN_PARM_INT(rx_ring_size1, MLX4_EN_AUTO_CONF, "Rx ring size for port 1");
+MLX4_EN_PARM_INT(rx_ring_size2, MLX4_EN_AUTO_CONF, "Rx ring size for port 2");
+
+
+int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
+{
+        struct mlx4_en_profile *params = &mdev->profile;
+
+        params->rx_moder_cnt = min_t(int, rx_moder_cnt, MLX4_EN_AUTO_CONF);
+        params->rx_moder_time = min_t(int, rx_moder_time, MLX4_EN_AUTO_CONF);
+        params->auto_moder = auto_moder;
+        params->rss_xor = (rss_xor != 0);
+        params->rss_mask = rss_mask & 0x1f;
+        params->num_lro = min_t(int, num_lro , MLX4_EN_MAX_LRO_DESCRIPTORS);
+        params->rx_pause = pprx;
+        params->rx_ppp = pfcrx;
+        params->tx_pause = pptx;
+        params->tx_ppp = pfctx;
+        if (params->rx_ppp || params->tx_ppp) {
+                params->prof[1].tx_ring_num = MLX4_EN_TX_RING_NUM;
+                params->prof[2].tx_ring_num = MLX4_EN_TX_RING_NUM;
+        } else {
+                params->prof[1].tx_ring_num = 1;
+                params->prof[2].tx_ring_num = 1;
+        }
+        params->prof[1].rx_ring_num = min_t(int, rx_ring_num1, MAX_RX_RINGS);
+        params->prof[2].rx_ring_num = min_t(int, rx_ring_num2, MAX_RX_RINGS);
+
+        if (tx_ring_size1 == MLX4_EN_AUTO_CONF)
+                tx_ring_size1 = MLX4_EN_DEF_TX_RING_SIZE;
+        params->prof[1].tx_ring_size =
+                (tx_ring_size1 < MLX4_EN_MIN_TX_SIZE) ?
+                 MLX4_EN_MIN_TX_SIZE : roundup_pow_of_two(tx_ring_size1);
+
+        if (tx_ring_size2 == MLX4_EN_AUTO_CONF)
+                tx_ring_size2 = MLX4_EN_DEF_TX_RING_SIZE;
+        params->prof[2].tx_ring_size =
+                (tx_ring_size2 < MLX4_EN_MIN_TX_SIZE) ?
+                 MLX4_EN_MIN_TX_SIZE : roundup_pow_of_two(tx_ring_size2);
+
+        if (rx_ring_size1 == MLX4_EN_AUTO_CONF)
+                rx_ring_size1 = MLX4_EN_DEF_RX_RING_SIZE;
+        params->prof[1].rx_ring_size =
+                (rx_ring_size1 < MLX4_EN_MIN_RX_SIZE) ?
+                 MLX4_EN_MIN_RX_SIZE : roundup_pow_of_two(rx_ring_size1);
+
+        if (rx_ring_size2 == MLX4_EN_AUTO_CONF)
+                rx_ring_size2 = MLX4_EN_DEF_RX_RING_SIZE;
+        params->prof[2].rx_ring_size =
+                (rx_ring_size2 < MLX4_EN_MIN_RX_SIZE) ?
+                 MLX4_EN_MIN_RX_SIZE : roundup_pow_of_two(rx_ring_size2);
+        return 0;
+}
+
+
+/*
+ * Ethtool support
+ */
+
+static void mlx4_en_update_lro_stats(struct mlx4_en_priv *priv)
+{
+        int i;
+
+        priv->port_stats.lro_aggregated = 0;
+        priv->port_stats.lro_flushed = 0;
+        priv->port_stats.lro_no_desc = 0;
+
+        for (i = 0; i < priv->rx_ring_num; i++) {
+                priv->port_stats.lro_aggregated += priv->rx_ring[i].lro.stats.aggregated;
+                priv->port_stats.lro_flushed += priv->rx_ring[i].lro.stats.flushed;
+                priv->port_stats.lro_no_desc += priv->rx_ring[i].lro.stats.no_desc;
+        }
+}
+
+static void
+mlx4_en_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo)
+{
+        struct mlx4_en_priv *priv = netdev_priv(dev);
+        struct mlx4_en_dev *mdev = priv->mdev;
+
+        sprintf(drvinfo->driver, DRV_NAME " (%s)", mdev->dev->board_id);
+        strncpy(drvinfo->version, DRV_VERSION " (" DRV_RELDATE ")", 32);
+        sprintf(drvinfo->fw_version, "%d.%d.%d",
+                (u16) (mdev->dev->caps.fw_ver >> 32),
+                (u16) ((mdev->dev->caps.fw_ver >> 16) & 0xffff),
+                (u16) (mdev->dev->caps.fw_ver & 0xffff));
+        strncpy(drvinfo->bus_info, pci_name(mdev->dev->pdev), 32);
+        drvinfo->n_stats = 0;
+        drvinfo->regdump_len = 0;
+        drvinfo->eedump_len = 0;
+}
+
+static u32 mlx4_en_get_tso(struct net_device *dev)
+{
+        return (dev->features & NETIF_F_TSO) != 0;
+}
+
+static int mlx4_en_set_tso(struct net_device *dev, u32 data)
+{
+        struct mlx4_en_priv *priv = netdev_priv(dev);
+
+        if (data) {
+                if (!priv->mdev->LSO_support)
+                        return -EPERM;
+                dev->features |= (NETIF_F_TSO | NETIF_F_TSO6);
+        } else
+                dev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
+        return 0;
+}
+
+static u32 mlx4_en_get_rx_csum(struct net_device *dev)
+{
+        struct mlx4_en_priv *priv = netdev_priv(dev);
+        return priv->rx_csum;
+}
+
+static int mlx4_en_set_rx_csum(struct net_device *dev, u32 data)
+{
+        struct mlx4_en_priv *priv = netdev_priv(dev);
+        priv->rx_csum = (data != 0);
+        return 0;
+}
+
+static const char main_strings[][ETH_GSTRING_LEN] = {
+        "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
+        "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
+        "rx_length_errors", "rx_over_errors", "rx_crc_errors",
+        "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
+        "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
+        "tx_heartbeat_errors", "tx_window_errors",
+
+        /* port statistics */
+        "lro_aggregated", "lro_flushed", "lro_no_desc", "tso_packets",
+        "queue_stopped", "wake_queue", "tx_timeout", "rx_alloc_failed",
+        "rx_csum_good", "rx_csum_none", "tx_chksum_offload",
+
+        /* packet statistics */
+        "broadcast", "rx_prio_0", "rx_prio_1", "rx_prio_2", "rx_prio_3",
+        "rx_prio_4", "rx_prio_5", "rx_prio_6", "rx_prio_7", "tx_prio_0",
+        "tx_prio_1", "tx_prio_2", "tx_prio_3", "tx_prio_4", "tx_prio_5",
+        "tx_prio_6", "tx_prio_7",
+};
+#define NUM_MAIN_STATS  21
+#define NUM_ALL_STATS   (NUM_MAIN_STATS + NUM_PORT_STATS + NUM_PKT_STATS + NUM_PERF_STATS)
+
+static u32 mlx4_en_get_msglevel(struct net_device *dev)
+{
+        return ((struct mlx4_en_priv *) netdev_priv(dev))->msg_enable;
+}
+
+static void mlx4_en_set_msglevel(struct net_device *dev, u32 val)
+{
+        ((struct mlx4_en_priv *) netdev_priv(dev))->msg_enable = val;
+}
+
+static void mlx4_en_get_wol(struct net_device *netdev,
+                            struct ethtool_wolinfo *wol)
+{
+        wol->supported = 0;
+        wol->wolopts = 0;
+
+        return;
+}
+
+static int mlx4_en_get_sset_count(struct net_device *dev, int sset)
+{
+        struct mlx4_en_priv *priv = netdev_priv(dev);
+
+        if (sset != ETH_SS_STATS)
+                return -EOPNOTSUPP;
+
+        return NUM_ALL_STATS + (priv->tx_ring_num + priv->rx_ring_num) * 2;
+}
+
+static void mlx4_en_get_ethtool_stats(struct net_device *dev,
+                struct ethtool_stats *stats, uint64_t *data)
+{
+        struct mlx4_en_priv *priv = netdev_priv(dev);
+        int index = 0;
+        int i;
+
+        spin_lock_bh(&priv->stats_lock);
+
+        mlx4_en_update_lro_stats(priv);
+
+        for (i = 0; i < NUM_MAIN_STATS; i++)
+                data[index++] = ((unsigned long *) &priv->stats)[i];
+        for (i = 0; i < NUM_PORT_STATS; i++)
+                data[index++] = ((unsigned long *) &priv->port_stats)[i];
+        for (i = 0; i < priv->tx_ring_num; i++) {
+                data[index++] = priv->tx_ring[i].packets;
+                data[index++] = priv->tx_ring[i].bytes;
+        }
+        for (i = 0; i < priv->rx_ring_num; i++) {
+                data[index++] = priv->rx_ring[i].packets;
+                data[index++] = priv->rx_ring[i].bytes;
+        }
+        for (i = 0; i < NUM_PKT_STATS; i++)
+                data[index++] = ((unsigned long *) &priv->pkstats)[i];
+        spin_unlock_bh(&priv->stats_lock);
+
+}
+
+static void mlx4_en_get_strings(struct net_device *dev,
+                                uint32_t stringset, uint8_t *data)
+{
+        struct mlx4_en_priv *priv = netdev_priv(dev);
+        int index = 0;
+        int i;
+
+        if (stringset != ETH_SS_STATS)
+                return;
+
+        /* Add main counters */
+        for (i = 0; i < NUM_MAIN_STATS; i++)
+                strcpy(data + (index++) * ETH_GSTRING_LEN, main_strings[i]);
+        for (i = 0; i < NUM_PORT_STATS; i++)
+                strcpy(data + (index++) * ETH_GSTRING_LEN,
+                        main_strings[i + NUM_MAIN_STATS]);
+        for (i = 0; i < priv->tx_ring_num; i++) {
+                sprintf(data + (index++) * ETH_GSTRING_LEN,
+                        "tx%d_packets", i);
+                sprintf(data + (index++) * ETH_GSTRING_LEN,
+                        "tx%d_bytes", i);
+        }
+        for (i = 0; i < priv->rx_ring_num; i++) {
+                sprintf(data + (index++) * ETH_GSTRING_LEN,
+                        "rx%d_packets", i);
+                sprintf(data + (index++) * ETH_GSTRING_LEN,
+                        "rx%d_bytes", i);
+        }
+        for (i = 0; i < NUM_PKT_STATS; i++)
+                strcpy(data + (index++) * ETH_GSTRING_LEN,
+                        main_strings[i + NUM_MAIN_STATS + NUM_PORT_STATS]);
+}
+
+static int mlx4_en_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+        cmd->autoneg = AUTONEG_DISABLE;
+        cmd->supported = SUPPORTED_10000baseT_Full;
+        cmd->advertising = SUPPORTED_10000baseT_Full;
+        if (netif_carrier_ok(dev)) {
+                cmd->speed = SPEED_10000;
+                cmd->duplex = DUPLEX_FULL;
+        } else {
+                cmd->speed = -1;
+                cmd->duplex = -1;
+        }
+        return 0;
+}
+
+static int mlx4_en_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+        if ((cmd->autoneg == AUTONEG_ENABLE) ||
+            (cmd->speed != SPEED_10000) || (cmd->duplex != DUPLEX_FULL))
+                return -EINVAL;
+
+        /* Nothing to change */
+        return 0;
+}
+
+static int mlx4_en_get_coalesce(struct net_device *dev,
+                              struct ethtool_coalesce *coal)
+{
+        struct mlx4_en_priv *priv = netdev_priv(dev);
+
+        coal->tx_coalesce_usecs = 0;
+        coal->tx_max_coalesced_frames = 0;
+        coal->rx_coalesce_usecs = priv->rx_usecs;
+        coal->rx_max_coalesced_frames = priv->rx_frames;
+
+        coal->pkt_rate_low = priv->pkt_rate_low;
+        coal->rx_coalesce_usecs_low = priv->rx_usecs_low;
+        coal->pkt_rate_high = priv->pkt_rate_high;
+        coal->rx_coalesce_usecs_high = priv->rx_usecs_high;
+        coal->rate_sample_interval = priv->sample_interval;
+        coal->use_adaptive_rx_coalesce = priv->adaptive_rx_coal;
+        return 0;
+}
+
+static int mlx4_en_set_coalesce(struct net_device *dev,
+                              struct ethtool_coalesce *coal)
+{
+        struct mlx4_en_priv *priv = netdev_priv(dev);
+        int err, i;
+
+        priv->rx_frames = (coal->rx_max_coalesced_frames ==
+                           MLX4_EN_AUTO_CONF) ?
+                                MLX4_EN_RX_COAL_TARGET /
+                                priv->dev->mtu + 1 :
+                                coal->rx_max_coalesced_frames;
+        priv->rx_usecs = (coal->rx_coalesce_usecs ==
+                          MLX4_EN_AUTO_CONF) ?
+                                MLX4_EN_RX_COAL_TIME :
+                                coal->rx_coalesce_usecs;
+
+        /* Set adaptive coalescing params */
+        priv->pkt_rate_low = coal->pkt_rate_low;
+        priv->rx_usecs_low = coal->rx_coalesce_usecs_low;
+        priv->pkt_rate_high = coal->pkt_rate_high;
+        priv->rx_usecs_high = coal->rx_coalesce_usecs_high;
+        priv->sample_interval = coal->rate_sample_interval;
+        priv->adaptive_rx_coal = coal->use_adaptive_rx_coalesce;
+        priv->last_moder_time = MLX4_EN_AUTO_CONF;
+        if (priv->adaptive_rx_coal)
+                return 0;
+
+        for (i = 0; i < priv->rx_ring_num; i++) {
+                priv->rx_cq[i].moder_cnt = priv->rx_frames;
+                priv->rx_cq[i].moder_time = priv->rx_usecs;
+                err = mlx4_en_set_cq_moder(priv, &priv->rx_cq[i]);
+                if (err)
+                        return err;
+        }
+        return 0;
+}
+
+static int mlx4_en_set_pauseparam(struct net_device *dev,
+                                struct ethtool_pauseparam *pause)
+{
+        struct mlx4_en_priv *priv = netdev_priv(dev);
+        struct mlx4_en_dev *mdev = priv->mdev;
+        int err;
+
+        mdev->profile.tx_pause = pause->tx_pause != 0;
+        mdev->profile.rx_pause = pause->rx_pause != 0;
+        err = mlx4_SET_PORT_general(mdev->dev, priv->port,
+                                    priv->rx_skb_size + ETH_FCS_LEN,
+                                    mdev->profile.tx_pause,
+                                    mdev->profile.tx_ppp,
+                                    mdev->profile.rx_pause,
+                                    mdev->profile.rx_ppp);
+        if (err)
+                mlx4_err(mdev, "Failed setting pause params to\n");
+
+        return err;
+}
+
+static void mlx4_en_get_pauseparam(struct net_device *dev,
+                                 struct ethtool_pauseparam *pause)
+{
+        struct mlx4_en_priv *priv = netdev_priv(dev);
+        struct mlx4_en_dev *mdev = priv->mdev;
+
+        pause->tx_pause = mdev->profile.tx_pause;
+        pause->rx_pause = mdev->profile.rx_pause;
+}
+
+static void mlx4_en_get_ringparam(struct net_device *dev,
+                                  struct ethtool_ringparam *param)
+{
+        struct mlx4_en_priv *priv = netdev_priv(dev);
+        struct mlx4_en_dev *mdev = priv->mdev;
+
+        memset(param, 0, sizeof(*param));
+        param->rx_max_pending = mdev->dev->caps.max_rq_sg;
+        param->tx_max_pending = mdev->dev->caps.max_sq_sg;
+        param->rx_pending = mdev->profile.prof[priv->port].rx_ring_size;
+        param->tx_pending = mdev->profile.prof[priv->port].tx_ring_size;
+}
+
+const struct ethtool_ops mlx4_en_ethtool_ops = {
+        .get_drvinfo = mlx4_en_get_drvinfo,
+        .get_settings = mlx4_en_get_settings,
+        .set_settings = mlx4_en_set_settings,
+#ifdef NETIF_F_TSO
+        .get_tso = mlx4_en_get_tso,
+        .set_tso = mlx4_en_set_tso,
+#endif
+        .get_sg = ethtool_op_get_sg,
+        .set_sg = ethtool_op_set_sg,
+        .get_link = ethtool_op_get_link,
+        .get_rx_csum = mlx4_en_get_rx_csum,
+        .set_rx_csum = mlx4_en_set_rx_csum,
+        .get_tx_csum = ethtool_op_get_tx_csum,
+        .set_tx_csum = ethtool_op_set_tx_ipv6_csum,
+        .get_strings = mlx4_en_get_strings,
+        .get_sset_count = mlx4_en_get_sset_count,
+        .get_ethtool_stats = mlx4_en_get_ethtool_stats,
+        .get_wol = mlx4_en_get_wol,
+        .get_msglevel = mlx4_en_get_msglevel,
+        .set_msglevel = mlx4_en_set_msglevel,
+        .get_coalesce = mlx4_en_get_coalesce,
+        .set_coalesce = mlx4_en_set_coalesce,
+        .get_pauseparam = mlx4_en_get_pauseparam,
+        .set_pauseparam = mlx4_en_set_pauseparam,
+        .get_ringparam = mlx4_en_get_ringparam,
+        .get_flags = ethtool_op_get_flags,
+        .set_flags = ethtool_op_set_flags,
+};
+
+
+
+
+