diff options
Diffstat (limited to 'drivers/net/mlx4/en_main.c')
| -rw-r--r-- | drivers/net/mlx4/en_main.c | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/drivers/net/mlx4/en_main.c b/drivers/net/mlx4/en_main.c new file mode 100644 index 00000000000..1b0eebf84f7 --- /dev/null +++ b/drivers/net/mlx4/en_main.c @@ -0,0 +1,254 @@ +/* + * 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/cpumask.h> +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/netdevice.h> +#include <linux/cpumask.h> + +#include <linux/mlx4/driver.h> +#include <linux/mlx4/device.h> +#include <linux/mlx4/cmd.h> + +#include "mlx4_en.h" + +MODULE_AUTHOR("Liran Liss, Yevgeny Petrilin"); +MODULE_DESCRIPTION("Mellanox ConnectX HCA Ethernet driver"); +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_VERSION(DRV_VERSION " ("DRV_RELDATE")"); + +static const char mlx4_en_version[] = + DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v" + DRV_VERSION " (" DRV_RELDATE ")\n"; + +static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr, + enum mlx4_dev_event event, int port) +{ + struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr; + struct mlx4_en_priv *priv; + + if (!mdev->pndev[port]) + return; + + priv = netdev_priv(mdev->pndev[port]); + switch (event) { + case MLX4_DEV_EVENT_PORT_UP: + case MLX4_DEV_EVENT_PORT_DOWN: + /* To prevent races, we poll the link state in a separate + task rather than changing it here */ + priv->link_state = event; + queue_work(mdev->workqueue, &priv->linkstate_task); + break; + + case MLX4_DEV_EVENT_CATASTROPHIC_ERROR: + mlx4_err(mdev, "Internal error detected, restarting device\n"); + break; + + default: + mlx4_warn(mdev, "Unhandled event: %d\n", event); + } +} + +static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr) +{ + struct mlx4_en_dev *mdev = endev_ptr; + int i; + + mutex_lock(&mdev->state_lock); + mdev->device_up = false; + mutex_unlock(&mdev->state_lock); + + mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) + if (mdev->pndev[i]) + mlx4_en_destroy_netdev(mdev->pndev[i]); + + flush_workqueue(mdev->workqueue); + destroy_workqueue(mdev->workqueue); + mlx4_mr_free(dev, &mdev->mr); + mlx4_uar_free(dev, &mdev->priv_uar); + mlx4_pd_free(dev, mdev->priv_pdn); + kfree(mdev); +} + +static void *mlx4_en_add(struct mlx4_dev *dev) +{ + static int mlx4_en_version_printed; + struct mlx4_en_dev *mdev; + int i; + int err; + + if (!mlx4_en_version_printed) { + printk(KERN_INFO "%s", mlx4_en_version); + mlx4_en_version_printed++; + } + + mdev = kzalloc(sizeof *mdev, GFP_KERNEL); + if (!mdev) { + dev_err(&dev->pdev->dev, "Device struct alloc failed, " + "aborting.\n"); + err = -ENOMEM; + goto err_free_res; + } + + if (mlx4_pd_alloc(dev, &mdev->priv_pdn)) + goto err_free_dev; + + if (mlx4_uar_alloc(dev, &mdev->priv_uar)) + goto err_pd; + + mdev->uar_map = ioremap(mdev->priv_uar.pfn << PAGE_SHIFT, PAGE_SIZE); + if (!mdev->uar_map) + goto err_uar; + spin_lock_init(&mdev->uar_lock); + + mdev->dev = dev; + mdev->dma_device = &(dev->pdev->dev); + mdev->pdev = dev->pdev; + mdev->device_up = false; + + mdev->LSO_support = !!(dev->caps.flags & (1 << 15)); + if (!mdev->LSO_support) + mlx4_warn(mdev, "LSO not supported, please upgrade to later " + "FW version to enable LSO\n"); + + if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull, + MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ, + 0, 0, &mdev->mr)) { + mlx4_err(mdev, "Failed allocating memory region\n"); + goto err_uar; + } + if (mlx4_mr_enable(mdev->dev, &mdev->mr)) { + mlx4_err(mdev, "Failed enabling memory region\n"); + goto err_mr; + } + + /* Build device profile according to supplied module parameters */ + err = mlx4_en_get_profile(mdev); + if (err) { + mlx4_err(mdev, "Bad module parameters, aborting.\n"); + goto err_mr; + } + + /* Configure wich ports to start according to module parameters */ + mdev->port_cnt = 0; + mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) + mdev->port_cnt++; + + /* If we did not receive an explicit number of Rx rings, default to + * the number of completion vectors populated by the mlx4_core */ + mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { + mlx4_info(mdev, "Using %d tx rings for port:%d\n", + mdev->profile.prof[i].tx_ring_num, i); + if (!mdev->profile.prof[i].rx_ring_num) { + mdev->profile.prof[i].rx_ring_num = 1; + mlx4_info(mdev, "Defaulting to %d rx rings for port:%d\n", + 1, i); + } else + mlx4_info(mdev, "Using %d rx rings for port:%d\n", + mdev->profile.prof[i].rx_ring_num, i); + } + + /* Create our own workqueue for reset/multicast tasks + * Note: we cannot use the shared workqueue because of deadlocks caused + * by the rtnl lock */ + mdev->workqueue = create_singlethread_workqueue("mlx4_en"); + if (!mdev->workqueue) { + err = -ENOMEM; + goto err_close_nic; + } + + /* At this stage all non-port specific tasks are complete: + * mark the card state as up */ + mutex_init(&mdev->state_lock); + mdev->device_up = true; + + /* Setup ports */ + + /* Create a netdev for each port */ + mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { + mlx4_info(mdev, "Activating port:%d\n", i); + if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i])) { + mdev->pndev[i] = NULL; + goto err_free_netdev; + } + } + return mdev; + + +err_free_netdev: + mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { + if (mdev->pndev[i]) + mlx4_en_destroy_netdev(mdev->pndev[i]); + } + + mutex_lock(&mdev->state_lock); + mdev->device_up = false; + mutex_unlock(&mdev->state_lock); + flush_workqueue(mdev->workqueue); + + /* Stop event queue before we drop down to release shared SW state */ + +err_close_nic: + destroy_workqueue(mdev->workqueue); +err_mr: + mlx4_mr_free(dev, &mdev->mr); +err_uar: + mlx4_uar_free(dev, &mdev->priv_uar); +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, +}; + +static int __init mlx4_en_init(void) +{ + 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); + |