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/slab.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); 50 51 static const char mlx4_en_version[] = 52 DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v" 53 DRV_VERSION "\n"; 54 55 #define MLX4_EN_PARM_INT(X, def_val, desc) \ 56 static unsigned int X = def_val;\ 57 module_param(X , uint, 0444); \ 58 MODULE_PARM_DESC(X, desc); 59 60 61 /* 62 * Device scope module parameters 63 */ 64 65 /* Enable RSS UDP traffic */ 66 MLX4_EN_PARM_INT(udp_rss, 1, 67 "Enable RSS for incoming UDP traffic or disabled (0)"); 68 69 /* Priority pausing */ 70 MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]." 71 " Per priority bit mask"); 72 MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]." 73 " Per priority bit mask"); 74 75 MLX4_EN_PARM_INT(inline_thold, MAX_INLINE, 76 "Threshold for using inline data (range: 17-104, default: 104)"); 77 78 #define MAX_PFC_TX 0xff 79 #define MAX_PFC_RX 0xff 80 81 void en_print(const char *level, const struct mlx4_en_priv *priv, 82 const char *format, ...) 83 { 84 va_list args; 85 struct va_format vaf; 86 87 va_start(args, format); 88 89 vaf.fmt = format; 90 vaf.va = &args; 91 if (priv->registered) 92 printk("%s%s: %s: %pV", 93 level, DRV_NAME, priv->dev->name, &vaf); 94 else 95 printk("%s%s: %s: Port %d: %pV", 96 level, DRV_NAME, dev_name(&priv->mdev->pdev->dev), 97 priv->port, &vaf); 98 va_end(args); 99 } 100 101 void mlx4_en_update_loopback_state(struct net_device *dev, 102 netdev_features_t features) 103 { 104 struct mlx4_en_priv *priv = netdev_priv(dev); 105 106 if (features & NETIF_F_LOOPBACK) 107 priv->ctrl_flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK); 108 else 109 priv->ctrl_flags &= cpu_to_be32(~MLX4_WQE_CTRL_FORCE_LOOPBACK); 110 111 priv->flags &= ~(MLX4_EN_FLAG_RX_FILTER_NEEDED| 112 MLX4_EN_FLAG_ENABLE_HW_LOOPBACK); 113 114 /* Drop the packet if SRIOV is not enabled 115 * and not performing the selftest or flb disabled 116 */ 117 if (mlx4_is_mfunc(priv->mdev->dev) && 118 !(features & NETIF_F_LOOPBACK) && !priv->validate_loopback) 119 priv->flags |= MLX4_EN_FLAG_RX_FILTER_NEEDED; 120 121 /* Set dmac in Tx WQE if we are in SRIOV mode or if loopback selftest 122 * is requested 123 */ 124 if (mlx4_is_mfunc(priv->mdev->dev) || priv->validate_loopback) 125 priv->flags |= MLX4_EN_FLAG_ENABLE_HW_LOOPBACK; 126 127 mutex_lock(&priv->mdev->state_lock); 128 if ((priv->mdev->dev->caps.flags2 & 129 MLX4_DEV_CAP_FLAG2_UPDATE_QP_SRC_CHECK_LB) && 130 priv->rss_map.indir_qp && priv->rss_map.indir_qp->qpn) { 131 int i; 132 int err = 0; 133 int loopback = !!(features & NETIF_F_LOOPBACK); 134 135 for (i = 0; i < priv->rx_ring_num; i++) { 136 int ret; 137 138 ret = mlx4_en_change_mcast_lb(priv, 139 &priv->rss_map.qps[i], 140 loopback); 141 if (!err) 142 err = ret; 143 } 144 if (err) 145 mlx4_warn(priv->mdev, "failed to change mcast loopback\n"); 146 } 147 mutex_unlock(&priv->mdev->state_lock); 148 } 149 150 static void mlx4_en_get_profile(struct mlx4_en_dev *mdev) 151 { 152 struct mlx4_en_profile *params = &mdev->profile; 153 int i; 154 155 params->udp_rss = udp_rss; 156 params->max_num_tx_rings_p_up = mlx4_low_memory_profile() ? 157 MLX4_EN_MIN_TX_RING_P_UP : 158 min_t(int, num_online_cpus(), MLX4_EN_MAX_TX_RING_P_UP); 159 160 if (params->udp_rss && !(mdev->dev->caps.flags 161 & MLX4_DEV_CAP_FLAG_UDP_RSS)) { 162 mlx4_warn(mdev, "UDP RSS is not supported on this device\n"); 163 params->udp_rss = 0; 164 } 165 for (i = 1; i <= MLX4_MAX_PORTS; i++) { 166 params->prof[i].rx_pause = !(pfcrx || pfctx); 167 params->prof[i].rx_ppp = pfcrx; 168 params->prof[i].tx_pause = !(pfcrx || pfctx); 169 params->prof[i].tx_ppp = pfctx; 170 if (mlx4_low_memory_profile()) { 171 params->prof[i].tx_ring_size = MLX4_EN_MIN_TX_SIZE; 172 params->prof[i].rx_ring_size = MLX4_EN_MIN_RX_SIZE; 173 } else { 174 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE; 175 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE; 176 } 177 params->prof[i].num_up = MLX4_EN_NUM_UP_LOW; 178 params->prof[i].num_tx_rings_p_up = params->max_num_tx_rings_p_up; 179 params->prof[i].tx_ring_num[TX] = params->max_num_tx_rings_p_up * 180 params->prof[i].num_up; 181 params->prof[i].rss_rings = 0; 182 params->prof[i].inline_thold = inline_thold; 183 } 184 } 185 186 static int mlx4_en_event(struct notifier_block *this, unsigned long event, 187 void *param) 188 { 189 struct mlx4_en_dev *mdev = 190 container_of(this, struct mlx4_en_dev, mlx_nb); 191 struct mlx4_dev *dev = mdev->dev; 192 struct mlx4_en_priv *priv; 193 int port; 194 195 switch (event) { 196 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR: 197 case MLX4_DEV_EVENT_PORT_MGMT_CHANGE: 198 case MLX4_DEV_EVENT_SLAVE_INIT: 199 case MLX4_DEV_EVENT_SLAVE_SHUTDOWN: 200 break; 201 default: 202 port = *(int *)param; 203 break; 204 } 205 206 switch (event) { 207 case MLX4_DEV_EVENT_PORT_UP: 208 case MLX4_DEV_EVENT_PORT_DOWN: 209 if (!mdev->pndev[port]) 210 return NOTIFY_DONE; 211 priv = netdev_priv(mdev->pndev[port]); 212 /* To prevent races, we poll the link state in a separate 213 task rather than changing it here */ 214 priv->link_state = event; 215 queue_work(mdev->workqueue, &priv->linkstate_task); 216 break; 217 218 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR: 219 mlx4_err(mdev, "Internal error detected, restarting device\n"); 220 break; 221 222 case MLX4_DEV_EVENT_PORT_MGMT_CHANGE: 223 case MLX4_DEV_EVENT_SLAVE_INIT: 224 case MLX4_DEV_EVENT_SLAVE_SHUTDOWN: 225 break; 226 default: 227 if (port < 1 || port > dev->caps.num_ports || 228 !mdev->pndev[port]) 229 return NOTIFY_DONE; 230 mlx4_warn(mdev, "Unhandled event %d for port %d\n", (int)event, 231 port); 232 } 233 234 return NOTIFY_DONE; 235 } 236 237 static void mlx4_en_remove(struct auxiliary_device *adev) 238 { 239 struct mlx4_adev *madev = container_of(adev, struct mlx4_adev, adev); 240 struct mlx4_dev *dev = madev->mdev; 241 struct mlx4_en_dev *mdev = auxiliary_get_drvdata(adev); 242 int i; 243 244 mlx4_unregister_event_notifier(dev, &mdev->mlx_nb); 245 246 mutex_lock(&mdev->state_lock); 247 mdev->device_up = false; 248 mutex_unlock(&mdev->state_lock); 249 250 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 251 if (mdev->pndev[i]) 252 mlx4_en_destroy_netdev(mdev->pndev[i]); 253 254 destroy_workqueue(mdev->workqueue); 255 (void) mlx4_mr_free(dev, &mdev->mr); 256 iounmap(mdev->uar_map); 257 mlx4_uar_free(dev, &mdev->priv_uar); 258 mlx4_pd_free(dev, mdev->priv_pdn); 259 if (mdev->netdev_nb.notifier_call) 260 unregister_netdevice_notifier(&mdev->netdev_nb); 261 kfree(mdev); 262 } 263 264 static int mlx4_en_probe(struct auxiliary_device *adev, 265 const struct auxiliary_device_id *id) 266 { 267 struct mlx4_adev *madev = container_of(adev, struct mlx4_adev, adev); 268 struct mlx4_dev *dev = madev->mdev; 269 struct mlx4_en_dev *mdev; 270 int err, i; 271 272 printk_once(KERN_INFO "%s", mlx4_en_version); 273 274 mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); 275 if (!mdev) { 276 err = -ENOMEM; 277 goto err_free_res; 278 } 279 280 err = mlx4_pd_alloc(dev, &mdev->priv_pdn); 281 if (err) 282 goto err_free_dev; 283 284 err = mlx4_uar_alloc(dev, &mdev->priv_uar); 285 if (err) 286 goto err_pd; 287 288 mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT, 289 PAGE_SIZE); 290 if (!mdev->uar_map) { 291 err = -ENOMEM; 292 goto err_uar; 293 } 294 spin_lock_init(&mdev->uar_lock); 295 296 mdev->dev = dev; 297 mdev->dma_device = &dev->persist->pdev->dev; 298 mdev->pdev = dev->persist->pdev; 299 mdev->device_up = false; 300 301 mdev->LSO_support = !!(dev->caps.flags & (1 << 15)); 302 if (!mdev->LSO_support) 303 mlx4_warn(mdev, "LSO not supported, please upgrade to later FW version to enable LSO\n"); 304 305 err = mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull, 306 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ, 0, 0, 307 &mdev->mr); 308 if (err) { 309 mlx4_err(mdev, "Failed allocating memory region\n"); 310 goto err_map; 311 } 312 err = mlx4_mr_enable(mdev->dev, &mdev->mr); 313 if (err) { 314 mlx4_err(mdev, "Failed enabling memory region\n"); 315 goto err_mr; 316 } 317 318 /* Build device profile according to supplied module parameters */ 319 mlx4_en_get_profile(mdev); 320 321 /* Configure which ports to start according to module parameters */ 322 mdev->port_cnt = 0; 323 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 324 mdev->port_cnt++; 325 326 /* Set default number of RX rings*/ 327 mlx4_en_set_num_rx_rings(mdev); 328 329 /* Create our own workqueue for reset/multicast tasks 330 * Note: we cannot use the shared workqueue because of deadlocks caused 331 * by the rtnl lock */ 332 mdev->workqueue = create_singlethread_workqueue("mlx4_en"); 333 if (!mdev->workqueue) { 334 err = -ENOMEM; 335 goto err_mr; 336 } 337 338 /* At this stage all non-port specific tasks are complete: 339 * mark the card state as up */ 340 mutex_init(&mdev->state_lock); 341 mdev->device_up = true; 342 343 /* register mlx4 core notifier */ 344 mdev->mlx_nb.notifier_call = mlx4_en_event; 345 err = mlx4_register_event_notifier(dev, &mdev->mlx_nb); 346 WARN(err, "failed to register mlx4 event notifier (%d)", err); 347 348 /* Setup ports */ 349 350 /* Create a netdev for each port */ 351 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { 352 mlx4_info(mdev, "Activating port:%d\n", i); 353 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i])) 354 mdev->pndev[i] = NULL; 355 } 356 357 /* register netdev notifier */ 358 mdev->netdev_nb.notifier_call = mlx4_en_netdev_event; 359 if (register_netdevice_notifier(&mdev->netdev_nb)) { 360 mdev->netdev_nb.notifier_call = NULL; 361 mlx4_err(mdev, "Failed to create netdev notifier\n"); 362 } 363 364 auxiliary_set_drvdata(adev, mdev); 365 return 0; 366 367 err_mr: 368 (void) mlx4_mr_free(dev, &mdev->mr); 369 err_map: 370 if (mdev->uar_map) 371 iounmap(mdev->uar_map); 372 err_uar: 373 mlx4_uar_free(dev, &mdev->priv_uar); 374 err_pd: 375 mlx4_pd_free(dev, mdev->priv_pdn); 376 err_free_dev: 377 kfree(mdev); 378 err_free_res: 379 return err; 380 } 381 382 static const struct auxiliary_device_id mlx4_en_id_table[] = { 383 { .name = MLX4_ADEV_NAME ".eth" }, 384 {}, 385 }; 386 387 MODULE_DEVICE_TABLE(auxiliary, mlx4_en_id_table); 388 389 static struct mlx4_adrv mlx4_en_adrv = { 390 .adrv = { 391 .name = "eth", 392 .probe = mlx4_en_probe, 393 .remove = mlx4_en_remove, 394 .id_table = mlx4_en_id_table, 395 }, 396 .protocol = MLX4_PROT_ETH, 397 }; 398 399 static void mlx4_en_verify_params(void) 400 { 401 if (pfctx > MAX_PFC_TX) { 402 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", 403 pfctx, MAX_PFC_TX); 404 pfctx = 0; 405 } 406 407 if (pfcrx > MAX_PFC_RX) { 408 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", 409 pfcrx, MAX_PFC_RX); 410 pfcrx = 0; 411 } 412 413 if (inline_thold < MIN_PKT_LEN || inline_thold > MAX_INLINE) { 414 pr_warn("mlx4_en: WARNING: illegal module parameter inline_thold %d - should be in range %d-%d, will be changed to default (%d)\n", 415 inline_thold, MIN_PKT_LEN, MAX_INLINE, MAX_INLINE); 416 inline_thold = MAX_INLINE; 417 } 418 } 419 420 static int __init mlx4_en_init(void) 421 { 422 mlx4_en_verify_params(); 423 mlx4_en_init_ptys2ethtool_map(); 424 425 return mlx4_register_auxiliary_driver(&mlx4_en_adrv); 426 } 427 428 static void __exit mlx4_en_cleanup(void) 429 { 430 mlx4_unregister_auxiliary_driver(&mlx4_en_adrv); 431 } 432 433 module_init(mlx4_en_init); 434 module_exit(mlx4_en_cleanup); 435 436