Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2007 Mellanox Technologies. All rights reserved. |
| 3 | * |
| 4 | * This software is available to you under a choice of one of two |
| 5 | * licenses. You may choose to be licensed under the terms of the GNU |
| 6 | * General Public License (GPL) Version 2, available from the file |
| 7 | * COPYING in the main directory of this source tree, or the |
| 8 | * OpenIB.org BSD license below: |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or |
| 11 | * without modification, are permitted provided that the following |
| 12 | * conditions are met: |
| 13 | * |
| 14 | * - Redistributions of source code must retain the above |
| 15 | * copyright notice, this list of conditions and the following |
| 16 | * disclaimer. |
| 17 | * |
| 18 | * - Redistributions in binary form must reproduce the above |
| 19 | * copyright notice, this list of conditions and the following |
| 20 | * disclaimer in the documentation and/or other materials |
| 21 | * provided with the distribution. |
| 22 | * |
| 23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 30 | * SOFTWARE. |
| 31 | * |
| 32 | */ |
| 33 | |
| 34 | #include <linux/cpumask.h> |
| 35 | #include <linux/module.h> |
| 36 | #include <linux/delay.h> |
| 37 | #include <linux/netdevice.h> |
| 38 | #include <linux/cpumask.h> |
| 39 | |
| 40 | #include <linux/mlx4/driver.h> |
| 41 | #include <linux/mlx4/device.h> |
| 42 | #include <linux/mlx4/cmd.h> |
| 43 | |
| 44 | #include "mlx4_en.h" |
| 45 | |
| 46 | MODULE_AUTHOR("Liran Liss, Yevgeny Petrilin"); |
| 47 | MODULE_DESCRIPTION("Mellanox ConnectX HCA Ethernet driver"); |
| 48 | MODULE_LICENSE("Dual BSD/GPL"); |
| 49 | MODULE_VERSION(DRV_VERSION " ("DRV_RELDATE")"); |
| 50 | |
| 51 | static const char mlx4_en_version[] = |
| 52 | DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v" |
| 53 | DRV_VERSION " (" DRV_RELDATE ")\n"; |
| 54 | |
| 55 | static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr, |
| 56 | enum mlx4_dev_event event, int port) |
| 57 | { |
| 58 | struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr; |
| 59 | struct mlx4_en_priv *priv; |
| 60 | |
| 61 | if (!mdev->pndev[port]) |
| 62 | return; |
| 63 | |
| 64 | priv = netdev_priv(mdev->pndev[port]); |
| 65 | switch (event) { |
| 66 | case MLX4_DEV_EVENT_PORT_UP: |
| 67 | case MLX4_DEV_EVENT_PORT_DOWN: |
| 68 | /* To prevent races, we poll the link state in a separate |
| 69 | task rather than changing it here */ |
| 70 | priv->link_state = event; |
| 71 | queue_work(mdev->workqueue, &priv->linkstate_task); |
| 72 | break; |
| 73 | |
| 74 | case MLX4_DEV_EVENT_CATASTROPHIC_ERROR: |
| 75 | mlx4_err(mdev, "Internal error detected, restarting device\n"); |
| 76 | break; |
| 77 | |
| 78 | default: |
| 79 | mlx4_warn(mdev, "Unhandled event: %d\n", event); |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr) |
| 84 | { |
| 85 | struct mlx4_en_dev *mdev = endev_ptr; |
| 86 | int i; |
| 87 | |
| 88 | mutex_lock(&mdev->state_lock); |
| 89 | mdev->device_up = false; |
| 90 | mutex_unlock(&mdev->state_lock); |
| 91 | |
| 92 | mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) |
| 93 | if (mdev->pndev[i]) |
| 94 | mlx4_en_destroy_netdev(mdev->pndev[i]); |
| 95 | |
| 96 | flush_workqueue(mdev->workqueue); |
| 97 | destroy_workqueue(mdev->workqueue); |
| 98 | mlx4_mr_free(dev, &mdev->mr); |
| 99 | mlx4_uar_free(dev, &mdev->priv_uar); |
| 100 | mlx4_pd_free(dev, mdev->priv_pdn); |
| 101 | kfree(mdev); |
| 102 | } |
| 103 | |
| 104 | static void *mlx4_en_add(struct mlx4_dev *dev) |
| 105 | { |
| 106 | static int mlx4_en_version_printed; |
| 107 | struct mlx4_en_dev *mdev; |
| 108 | int i; |
| 109 | int err; |
| 110 | |
| 111 | if (!mlx4_en_version_printed) { |
| 112 | printk(KERN_INFO "%s", mlx4_en_version); |
| 113 | mlx4_en_version_printed++; |
| 114 | } |
| 115 | |
| 116 | mdev = kzalloc(sizeof *mdev, GFP_KERNEL); |
| 117 | if (!mdev) { |
| 118 | dev_err(&dev->pdev->dev, "Device struct alloc failed, " |
| 119 | "aborting.\n"); |
| 120 | err = -ENOMEM; |
| 121 | goto err_free_res; |
| 122 | } |
| 123 | |
| 124 | if (mlx4_pd_alloc(dev, &mdev->priv_pdn)) |
| 125 | goto err_free_dev; |
| 126 | |
| 127 | if (mlx4_uar_alloc(dev, &mdev->priv_uar)) |
| 128 | goto err_pd; |
| 129 | |
| 130 | mdev->uar_map = ioremap(mdev->priv_uar.pfn << PAGE_SHIFT, PAGE_SIZE); |
| 131 | if (!mdev->uar_map) |
| 132 | goto err_uar; |
| 133 | spin_lock_init(&mdev->uar_lock); |
| 134 | |
| 135 | mdev->dev = dev; |
| 136 | mdev->dma_device = &(dev->pdev->dev); |
| 137 | mdev->pdev = dev->pdev; |
| 138 | mdev->device_up = false; |
| 139 | |
| 140 | mdev->LSO_support = !!(dev->caps.flags & (1 << 15)); |
| 141 | if (!mdev->LSO_support) |
| 142 | mlx4_warn(mdev, "LSO not supported, please upgrade to later " |
| 143 | "FW version to enable LSO\n"); |
| 144 | |
| 145 | if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull, |
| 146 | MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ, |
| 147 | 0, 0, &mdev->mr)) { |
| 148 | mlx4_err(mdev, "Failed allocating memory region\n"); |
| 149 | goto err_uar; |
| 150 | } |
| 151 | if (mlx4_mr_enable(mdev->dev, &mdev->mr)) { |
| 152 | mlx4_err(mdev, "Failed enabling memory region\n"); |
| 153 | goto err_mr; |
| 154 | } |
| 155 | |
| 156 | /* Build device profile according to supplied module parameters */ |
| 157 | err = mlx4_en_get_profile(mdev); |
| 158 | if (err) { |
| 159 | mlx4_err(mdev, "Bad module parameters, aborting.\n"); |
| 160 | goto err_mr; |
| 161 | } |
| 162 | |
| 163 | /* Configure wich ports to start according to module parameters */ |
| 164 | mdev->port_cnt = 0; |
| 165 | mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) |
| 166 | mdev->port_cnt++; |
| 167 | |
| 168 | /* If we did not receive an explicit number of Rx rings, default to |
| 169 | * the number of completion vectors populated by the mlx4_core */ |
| 170 | mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { |
| 171 | mlx4_info(mdev, "Using %d tx rings for port:%d\n", |
| 172 | mdev->profile.prof[i].tx_ring_num, i); |
| 173 | if (!mdev->profile.prof[i].rx_ring_num) { |
| 174 | mdev->profile.prof[i].rx_ring_num = 1; |
| 175 | mlx4_info(mdev, "Defaulting to %d rx rings for port:%d\n", |
| 176 | 1, i); |
| 177 | } else |
| 178 | mlx4_info(mdev, "Using %d rx rings for port:%d\n", |
| 179 | mdev->profile.prof[i].rx_ring_num, i); |
| 180 | } |
| 181 | |
| 182 | /* Create our own workqueue for reset/multicast tasks |
| 183 | * Note: we cannot use the shared workqueue because of deadlocks caused |
| 184 | * by the rtnl lock */ |
| 185 | mdev->workqueue = create_singlethread_workqueue("mlx4_en"); |
| 186 | if (!mdev->workqueue) { |
| 187 | err = -ENOMEM; |
| 188 | goto err_close_nic; |
| 189 | } |
| 190 | |
| 191 | /* At this stage all non-port specific tasks are complete: |
| 192 | * mark the card state as up */ |
| 193 | mutex_init(&mdev->state_lock); |
| 194 | mdev->device_up = true; |
| 195 | |
| 196 | /* Setup ports */ |
| 197 | |
| 198 | /* Create a netdev for each port */ |
| 199 | mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { |
| 200 | mlx4_info(mdev, "Activating port:%d\n", i); |
| 201 | if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i])) { |
| 202 | mdev->pndev[i] = NULL; |
| 203 | goto err_free_netdev; |
| 204 | } |
| 205 | } |
| 206 | return mdev; |
| 207 | |
| 208 | |
| 209 | err_free_netdev: |
| 210 | mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { |
| 211 | if (mdev->pndev[i]) |
| 212 | mlx4_en_destroy_netdev(mdev->pndev[i]); |
| 213 | } |
| 214 | |
| 215 | mutex_lock(&mdev->state_lock); |
| 216 | mdev->device_up = false; |
| 217 | mutex_unlock(&mdev->state_lock); |
| 218 | flush_workqueue(mdev->workqueue); |
| 219 | |
| 220 | /* Stop event queue before we drop down to release shared SW state */ |
| 221 | |
| 222 | err_close_nic: |
| 223 | destroy_workqueue(mdev->workqueue); |
| 224 | err_mr: |
| 225 | mlx4_mr_free(dev, &mdev->mr); |
| 226 | err_uar: |
| 227 | mlx4_uar_free(dev, &mdev->priv_uar); |
| 228 | err_pd: |
| 229 | mlx4_pd_free(dev, mdev->priv_pdn); |
| 230 | err_free_dev: |
| 231 | kfree(mdev); |
| 232 | err_free_res: |
| 233 | return NULL; |
| 234 | } |
| 235 | |
| 236 | static struct mlx4_interface mlx4_en_interface = { |
| 237 | .add = mlx4_en_add, |
| 238 | .remove = mlx4_en_remove, |
| 239 | .event = mlx4_en_event, |
| 240 | }; |
| 241 | |
| 242 | static int __init mlx4_en_init(void) |
| 243 | { |
| 244 | return mlx4_register_interface(&mlx4_en_interface); |
| 245 | } |
| 246 | |
| 247 | static void __exit mlx4_en_cleanup(void) |
| 248 | { |
| 249 | mlx4_unregister_interface(&mlx4_en_interface); |
| 250 | } |
| 251 | |
| 252 | module_init(mlx4_en_init); |
| 253 | module_exit(mlx4_en_cleanup); |
| 254 | |