283 lines
8.0 KiB
C
283 lines
8.0 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/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 " ("DRV_RELDATE")");
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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 " (" DRV_RELDATE ")\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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/* Use a XOR rathern than Toeplitz hash function for RSS */
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MLX4_EN_PARM_INT(rss_xor, 0, "Use XOR hash function for RSS");
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/* RSS hash type mask - default to <saddr, daddr, sport, dport> */
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MLX4_EN_PARM_INT(rss_mask, 0xf, "RSS hash type bitmask");
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/* Number of LRO sessions per Rx ring (rounded up to a power of two) */
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MLX4_EN_PARM_INT(num_lro, MLX4_EN_MAX_LRO_DESCRIPTORS,
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"Number of LRO sessions per ring 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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static int 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->rss_xor = (rss_xor != 0);
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params->rss_mask = rss_mask & 0x1f;
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params->num_lro = min_t(int, num_lro , MLX4_EN_MAX_LRO_DESCRIPTORS);
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for (i = 1; i <= MLX4_MAX_PORTS; i++) {
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params->prof[i].rx_pause = 1;
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params->prof[i].rx_ppp = pfcrx;
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params->prof[i].tx_pause = 1;
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params->prof[i].tx_ppp = pfctx;
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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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params->prof[i].tx_ring_num = MLX4_EN_NUM_TX_RINGS +
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(!!pfcrx) * MLX4_EN_NUM_PPP_RINGS;
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}
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return 0;
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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, int 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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if (!mdev->pndev[port])
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return;
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priv = netdev_priv(mdev->pndev[port]);
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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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/* 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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default:
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mlx4_warn(mdev, "Unhandled event: %d\n", event);
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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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mlx4_mr_free(dev, &mdev->mr);
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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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kfree(mdev);
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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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static int mlx4_en_version_printed;
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struct mlx4_en_dev *mdev;
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int i;
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int err;
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if (!mlx4_en_version_printed) {
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printk(KERN_INFO "%s", mlx4_en_version);
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mlx4_en_version_printed++;
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}
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mdev = kzalloc(sizeof *mdev, GFP_KERNEL);
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if (!mdev) {
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dev_err(&dev->pdev->dev, "Device struct alloc failed, "
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"aborting.\n");
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err = -ENOMEM;
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goto err_free_res;
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}
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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(mdev->priv_uar.pfn << PAGE_SHIFT, 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->pdev->dev);
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mdev->pdev = dev->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 "
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"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_uar;
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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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err = mlx4_en_get_profile(mdev);
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if (err) {
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mlx4_err(mdev, "Bad module parameters, aborting.\n");
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goto err_mr;
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}
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/* Configure wich 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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/* If we did not receive an explicit number of Rx rings, default to
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* the number of completion vectors populated by the mlx4_core */
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mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
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mlx4_info(mdev, "Using %d tx rings for port:%d\n",
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mdev->profile.prof[i].tx_ring_num, i);
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mdev->profile.prof[i].rx_ring_num = min_t(int,
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roundup_pow_of_two(dev->caps.num_comp_vectors),
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MAX_RX_RINGS);
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mlx4_info(mdev, "Defaulting to %d rx rings for port:%d\n",
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mdev->profile.prof[i].rx_ring_num, i);
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}
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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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err = -ENOMEM;
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goto err_mr;
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}
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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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/* Setup ports */
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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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return mdev;
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err_mr:
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mlx4_mr_free(dev, &mdev->mr);
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err_uar:
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mlx4_uar_free(dev, &mdev->priv_uar);
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err_pd:
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mlx4_pd_free(dev, mdev->priv_pdn);
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err_free_dev:
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kfree(mdev);
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err_free_res:
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return NULL;
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}
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static struct mlx4_interface mlx4_en_interface = {
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.add = mlx4_en_add,
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.remove = mlx4_en_remove,
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.event = mlx4_en_event,
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};
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static int __init mlx4_en_init(void)
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{
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return mlx4_register_interface(&mlx4_en_interface);
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}
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static void __exit mlx4_en_cleanup(void)
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{
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mlx4_unregister_interface(&mlx4_en_interface);
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}
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module_init(mlx4_en_init);
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module_exit(mlx4_en_cleanup);
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