400 lines
11 KiB
C
400 lines
11 KiB
C
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/*
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* Copyright (c) 2007 Mellanox Technologies. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#include <linux/cpumask.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/slab.h>
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#include <linux/mlx4/driver.h>
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#include <linux/mlx4/device.h>
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#include <linux/mlx4/cmd.h>
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#include "mlx4_en.h"
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MODULE_AUTHOR("Liran Liss, Yevgeny Petrilin");
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MODULE_DESCRIPTION("Mellanox ConnectX HCA Ethernet driver");
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_VERSION(DRV_VERSION);
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static const char mlx4_en_version[] =
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DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v"
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DRV_VERSION "\n";
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#define MLX4_EN_PARM_INT(X, def_val, desc) \
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static unsigned int X = def_val;\
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module_param(X , uint, 0444); \
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MODULE_PARM_DESC(X, desc);
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/*
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* Device scope module parameters
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*/
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/* Enable RSS UDP traffic */
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MLX4_EN_PARM_INT(udp_rss, 1,
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"Enable RSS for incoming UDP traffic or disabled (0)");
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/* Priority pausing */
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MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."
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" Per priority bit mask");
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MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]."
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" Per priority bit mask");
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MLX4_EN_PARM_INT(inline_thold, MAX_INLINE,
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"Threshold for using inline data (range: 17-104, default: 104)");
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#define MAX_PFC_TX 0xff
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#define MAX_PFC_RX 0xff
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void en_print(const char *level, const struct mlx4_en_priv *priv,
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const char *format, ...)
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{
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va_list args;
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struct va_format vaf;
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va_start(args, format);
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vaf.fmt = format;
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vaf.va = &args;
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if (priv->registered)
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printk("%s%s: %s: %pV",
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level, DRV_NAME, priv->dev->name, &vaf);
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else
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printk("%s%s: %s: Port %d: %pV",
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level, DRV_NAME, dev_name(&priv->mdev->pdev->dev),
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priv->port, &vaf);
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va_end(args);
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}
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void mlx4_en_update_loopback_state(struct net_device *dev,
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netdev_features_t features)
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{
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struct mlx4_en_priv *priv = netdev_priv(dev);
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if (features & NETIF_F_LOOPBACK)
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priv->ctrl_flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
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else
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priv->ctrl_flags &= cpu_to_be32(~MLX4_WQE_CTRL_FORCE_LOOPBACK);
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priv->flags &= ~(MLX4_EN_FLAG_RX_FILTER_NEEDED|
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MLX4_EN_FLAG_ENABLE_HW_LOOPBACK);
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/* Drop the packet if SRIOV is not enabled
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* and not performing the selftest or flb disabled
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*/
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if (mlx4_is_mfunc(priv->mdev->dev) &&
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!(features & NETIF_F_LOOPBACK) && !priv->validate_loopback)
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priv->flags |= MLX4_EN_FLAG_RX_FILTER_NEEDED;
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/* Set dmac in Tx WQE if we are in SRIOV mode or if loopback selftest
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* is requested
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*/
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if (mlx4_is_mfunc(priv->mdev->dev) || priv->validate_loopback)
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priv->flags |= MLX4_EN_FLAG_ENABLE_HW_LOOPBACK;
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mutex_lock(&priv->mdev->state_lock);
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if ((priv->mdev->dev->caps.flags2 &
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MLX4_DEV_CAP_FLAG2_UPDATE_QP_SRC_CHECK_LB) &&
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priv->rss_map.indir_qp && priv->rss_map.indir_qp->qpn) {
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int i;
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int err = 0;
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int loopback = !!(features & NETIF_F_LOOPBACK);
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for (i = 0; i < priv->rx_ring_num; i++) {
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int ret;
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ret = mlx4_en_change_mcast_lb(priv,
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&priv->rss_map.qps[i],
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loopback);
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if (!err)
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err = ret;
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}
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if (err)
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mlx4_warn(priv->mdev, "failed to change mcast loopback\n");
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}
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mutex_unlock(&priv->mdev->state_lock);
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}
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static void mlx4_en_get_profile(struct mlx4_en_dev *mdev)
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{
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struct mlx4_en_profile *params = &mdev->profile;
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int i;
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params->udp_rss = udp_rss;
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params->max_num_tx_rings_p_up = mlx4_low_memory_profile() ?
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MLX4_EN_MIN_TX_RING_P_UP :
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min_t(int, num_online_cpus(), MLX4_EN_MAX_TX_RING_P_UP);
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if (params->udp_rss && !(mdev->dev->caps.flags
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& MLX4_DEV_CAP_FLAG_UDP_RSS)) {
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mlx4_warn(mdev, "UDP RSS is not supported on this device\n");
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params->udp_rss = 0;
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}
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for (i = 1; i <= MLX4_MAX_PORTS; i++) {
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params->prof[i].rx_pause = !(pfcrx || pfctx);
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params->prof[i].rx_ppp = pfcrx;
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params->prof[i].tx_pause = !(pfcrx || pfctx);
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params->prof[i].tx_ppp = pfctx;
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if (mlx4_low_memory_profile()) {
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params->prof[i].tx_ring_size = MLX4_EN_MIN_TX_SIZE;
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params->prof[i].rx_ring_size = MLX4_EN_MIN_RX_SIZE;
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} else {
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params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
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params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
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}
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params->prof[i].num_up = MLX4_EN_NUM_UP_LOW;
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params->prof[i].num_tx_rings_p_up = params->max_num_tx_rings_p_up;
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params->prof[i].tx_ring_num[TX] = params->max_num_tx_rings_p_up *
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params->prof[i].num_up;
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params->prof[i].rss_rings = 0;
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params->prof[i].inline_thold = inline_thold;
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}
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}
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static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port)
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{
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struct mlx4_en_dev *endev = ctx;
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return endev->pndev[port];
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}
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static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
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enum mlx4_dev_event event, unsigned long port)
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{
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struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
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struct mlx4_en_priv *priv;
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switch (event) {
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case MLX4_DEV_EVENT_PORT_UP:
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case MLX4_DEV_EVENT_PORT_DOWN:
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if (!mdev->pndev[port])
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return;
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priv = netdev_priv(mdev->pndev[port]);
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/* To prevent races, we poll the link state in a separate
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task rather than changing it here */
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priv->link_state = event;
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queue_work(mdev->workqueue, &priv->linkstate_task);
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break;
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case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
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mlx4_err(mdev, "Internal error detected, restarting device\n");
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break;
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case MLX4_DEV_EVENT_SLAVE_INIT:
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case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
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break;
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default:
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if (port < 1 || port > dev->caps.num_ports ||
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!mdev->pndev[port])
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return;
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mlx4_warn(mdev, "Unhandled event %d for port %d\n", event,
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(int) port);
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}
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}
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static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
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{
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struct mlx4_en_dev *mdev = endev_ptr;
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int i;
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mutex_lock(&mdev->state_lock);
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mdev->device_up = false;
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mutex_unlock(&mdev->state_lock);
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mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
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if (mdev->pndev[i])
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mlx4_en_destroy_netdev(mdev->pndev[i]);
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flush_workqueue(mdev->workqueue);
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destroy_workqueue(mdev->workqueue);
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(void) mlx4_mr_free(dev, &mdev->mr);
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iounmap(mdev->uar_map);
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mlx4_uar_free(dev, &mdev->priv_uar);
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mlx4_pd_free(dev, mdev->priv_pdn);
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if (mdev->nb.notifier_call)
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unregister_netdevice_notifier(&mdev->nb);
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kfree(mdev);
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}
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static void mlx4_en_activate(struct mlx4_dev *dev, void *ctx)
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{
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int i;
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struct mlx4_en_dev *mdev = ctx;
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/* Create a netdev for each port */
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mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
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mlx4_info(mdev, "Activating port:%d\n", i);
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if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
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mdev->pndev[i] = NULL;
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}
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/* register notifier */
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mdev->nb.notifier_call = mlx4_en_netdev_event;
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if (register_netdevice_notifier(&mdev->nb)) {
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mdev->nb.notifier_call = NULL;
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mlx4_err(mdev, "Failed to create notifier\n");
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}
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}
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static void *mlx4_en_add(struct mlx4_dev *dev)
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{
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struct mlx4_en_dev *mdev;
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int i;
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printk_once(KERN_INFO "%s", mlx4_en_version);
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mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
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if (!mdev)
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goto err_free_res;
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if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
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goto err_free_dev;
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if (mlx4_uar_alloc(dev, &mdev->priv_uar))
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goto err_pd;
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mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
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PAGE_SIZE);
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if (!mdev->uar_map)
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goto err_uar;
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spin_lock_init(&mdev->uar_lock);
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mdev->dev = dev;
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mdev->dma_device = &dev->persist->pdev->dev;
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mdev->pdev = dev->persist->pdev;
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mdev->device_up = false;
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mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
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if (!mdev->LSO_support)
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mlx4_warn(mdev, "LSO not supported, please upgrade to later FW version to enable LSO\n");
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if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
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MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ,
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0, 0, &mdev->mr)) {
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mlx4_err(mdev, "Failed allocating memory region\n");
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goto err_map;
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}
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if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
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mlx4_err(mdev, "Failed enabling memory region\n");
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goto err_mr;
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}
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/* Build device profile according to supplied module parameters */
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mlx4_en_get_profile(mdev);
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/* Configure which ports to start according to module parameters */
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mdev->port_cnt = 0;
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mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
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mdev->port_cnt++;
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/* Set default number of RX rings*/
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mlx4_en_set_num_rx_rings(mdev);
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/* Create our own workqueue for reset/multicast tasks
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* Note: we cannot use the shared workqueue because of deadlocks caused
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* by the rtnl lock */
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mdev->workqueue = create_singlethread_workqueue("mlx4_en");
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if (!mdev->workqueue)
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goto err_mr;
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/* At this stage all non-port specific tasks are complete:
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* mark the card state as up */
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mutex_init(&mdev->state_lock);
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mdev->device_up = true;
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return mdev;
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err_mr:
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(void) mlx4_mr_free(dev, &mdev->mr);
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err_map:
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if (mdev->uar_map)
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iounmap(mdev->uar_map);
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err_uar:
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mlx4_uar_free(dev, &mdev->priv_uar);
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|
|
err_pd:
|
||
|
|
mlx4_pd_free(dev, mdev->priv_pdn);
|
||
|
|
err_free_dev:
|
||
|
|
kfree(mdev);
|
||
|
|
err_free_res:
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct mlx4_interface mlx4_en_interface = {
|
||
|
|
.add = mlx4_en_add,
|
||
|
|
.remove = mlx4_en_remove,
|
||
|
|
.event = mlx4_en_event,
|
||
|
|
.get_dev = mlx4_en_get_netdev,
|
||
|
|
.protocol = MLX4_PROT_ETH,
|
||
|
|
.activate = mlx4_en_activate,
|
||
|
|
};
|
||
|
|
|
||
|
|
static void mlx4_en_verify_params(void)
|
||
|
|
{
|
||
|
|
if (pfctx > MAX_PFC_TX) {
|
||
|
|
pr_warn("mlx4_en: WARNING: illegal module parameter pfctx 0x%x - should be in range 0-0x%x, will be changed to default (0)\n",
|
||
|
|
pfctx, MAX_PFC_TX);
|
||
|
|
pfctx = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pfcrx > MAX_PFC_RX) {
|
||
|
|
pr_warn("mlx4_en: WARNING: illegal module parameter pfcrx 0x%x - should be in range 0-0x%x, will be changed to default (0)\n",
|
||
|
|
pfcrx, MAX_PFC_RX);
|
||
|
|
pfcrx = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (inline_thold < MIN_PKT_LEN || inline_thold > MAX_INLINE) {
|
||
|
|
pr_warn("mlx4_en: WARNING: illegal module parameter inline_thold %d - should be in range %d-%d, will be changed to default (%d)\n",
|
||
|
|
inline_thold, MIN_PKT_LEN, MAX_INLINE, MAX_INLINE);
|
||
|
|
inline_thold = MAX_INLINE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int __init mlx4_en_init(void)
|
||
|
|
{
|
||
|
|
mlx4_en_verify_params();
|
||
|
|
mlx4_en_init_ptys2ethtool_map();
|
||
|
|
|
||
|
|
return mlx4_register_interface(&mlx4_en_interface);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __exit mlx4_en_cleanup(void)
|
||
|
|
{
|
||
|
|
mlx4_unregister_interface(&mlx4_en_interface);
|
||
|
|
}
|
||
|
|
|
||
|
|
module_init(mlx4_en_init);
|
||
|
|
module_exit(mlx4_en_cleanup);
|
||
|
|
|