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 void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port) 187 { 188 struct mlx4_en_dev *endev = ctx; 189 190 return endev->pndev[port]; 191 } 192 193 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr, 194 enum mlx4_dev_event event, unsigned long port) 195 { 196 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr; 197 struct mlx4_en_priv *priv; 198 199 switch (event) { 200 case MLX4_DEV_EVENT_PORT_UP: 201 case MLX4_DEV_EVENT_PORT_DOWN: 202 if (!mdev->pndev[port]) 203 return; 204 priv = netdev_priv(mdev->pndev[port]); 205 /* To prevent races, we poll the link state in a separate 206 task rather than changing it here */ 207 priv->link_state = event; 208 queue_work(mdev->workqueue, &priv->linkstate_task); 209 break; 210 211 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR: 212 mlx4_err(mdev, "Internal error detected, restarting device\n"); 213 break; 214 215 case MLX4_DEV_EVENT_SLAVE_INIT: 216 case MLX4_DEV_EVENT_SLAVE_SHUTDOWN: 217 break; 218 default: 219 if (port < 1 || port > dev->caps.num_ports || 220 !mdev->pndev[port]) 221 return; 222 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event, 223 (int) port); 224 } 225 } 226 227 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr) 228 { 229 struct mlx4_en_dev *mdev = endev_ptr; 230 int i; 231 232 mutex_lock(&mdev->state_lock); 233 mdev->device_up = false; 234 mutex_unlock(&mdev->state_lock); 235 236 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 237 if (mdev->pndev[i]) 238 mlx4_en_destroy_netdev(mdev->pndev[i]); 239 240 destroy_workqueue(mdev->workqueue); 241 (void) mlx4_mr_free(dev, &mdev->mr); 242 iounmap(mdev->uar_map); 243 mlx4_uar_free(dev, &mdev->priv_uar); 244 mlx4_pd_free(dev, mdev->priv_pdn); 245 if (mdev->nb.notifier_call) 246 unregister_netdevice_notifier(&mdev->nb); 247 kfree(mdev); 248 } 249 250 static void mlx4_en_activate(struct mlx4_dev *dev, void *ctx) 251 { 252 int i; 253 struct mlx4_en_dev *mdev = ctx; 254 255 /* Create a netdev for each port */ 256 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { 257 mlx4_info(mdev, "Activating port:%d\n", i); 258 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i])) 259 mdev->pndev[i] = NULL; 260 } 261 262 /* register notifier */ 263 mdev->nb.notifier_call = mlx4_en_netdev_event; 264 if (register_netdevice_notifier(&mdev->nb)) { 265 mdev->nb.notifier_call = NULL; 266 mlx4_err(mdev, "Failed to create notifier\n"); 267 } 268 } 269 270 static void *mlx4_en_add(struct mlx4_dev *dev) 271 { 272 struct mlx4_en_dev *mdev; 273 int i; 274 275 printk_once(KERN_INFO "%s", mlx4_en_version); 276 277 mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); 278 if (!mdev) 279 goto err_free_res; 280 281 if (mlx4_pd_alloc(dev, &mdev->priv_pdn)) 282 goto err_free_dev; 283 284 if (mlx4_uar_alloc(dev, &mdev->priv_uar)) 285 goto err_pd; 286 287 mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT, 288 PAGE_SIZE); 289 if (!mdev->uar_map) 290 goto err_uar; 291 spin_lock_init(&mdev->uar_lock); 292 293 mdev->dev = dev; 294 mdev->dma_device = &dev->persist->pdev->dev; 295 mdev->pdev = dev->persist->pdev; 296 mdev->device_up = false; 297 298 mdev->LSO_support = !!(dev->caps.flags & (1 << 15)); 299 if (!mdev->LSO_support) 300 mlx4_warn(mdev, "LSO not supported, please upgrade to later FW version to enable LSO\n"); 301 302 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull, 303 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ, 304 0, 0, &mdev->mr)) { 305 mlx4_err(mdev, "Failed allocating memory region\n"); 306 goto err_map; 307 } 308 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) { 309 mlx4_err(mdev, "Failed enabling memory region\n"); 310 goto err_mr; 311 } 312 313 /* Build device profile according to supplied module parameters */ 314 mlx4_en_get_profile(mdev); 315 316 /* Configure which ports to start according to module parameters */ 317 mdev->port_cnt = 0; 318 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 319 mdev->port_cnt++; 320 321 /* Set default number of RX rings*/ 322 mlx4_en_set_num_rx_rings(mdev); 323 324 /* Create our own workqueue for reset/multicast tasks 325 * Note: we cannot use the shared workqueue because of deadlocks caused 326 * by the rtnl lock */ 327 mdev->workqueue = create_singlethread_workqueue("mlx4_en"); 328 if (!mdev->workqueue) 329 goto err_mr; 330 331 /* At this stage all non-port specific tasks are complete: 332 * mark the card state as up */ 333 mutex_init(&mdev->state_lock); 334 mdev->device_up = true; 335 336 return mdev; 337 338 err_mr: 339 (void) mlx4_mr_free(dev, &mdev->mr); 340 err_map: 341 if (mdev->uar_map) 342 iounmap(mdev->uar_map); 343 err_uar: 344 mlx4_uar_free(dev, &mdev->priv_uar); 345 err_pd: 346 mlx4_pd_free(dev, mdev->priv_pdn); 347 err_free_dev: 348 kfree(mdev); 349 err_free_res: 350 return NULL; 351 } 352 353 static struct mlx4_interface mlx4_en_interface = { 354 .add = mlx4_en_add, 355 .remove = mlx4_en_remove, 356 .event = mlx4_en_event, 357 .get_dev = mlx4_en_get_netdev, 358 .protocol = MLX4_PROT_ETH, 359 .activate = mlx4_en_activate, 360 }; 361 362 static void mlx4_en_verify_params(void) 363 { 364 if (pfctx > MAX_PFC_TX) { 365 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", 366 pfctx, MAX_PFC_TX); 367 pfctx = 0; 368 } 369 370 if (pfcrx > MAX_PFC_RX) { 371 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", 372 pfcrx, MAX_PFC_RX); 373 pfcrx = 0; 374 } 375 376 if (inline_thold < MIN_PKT_LEN || inline_thold > MAX_INLINE) { 377 pr_warn("mlx4_en: WARNING: illegal module parameter inline_thold %d - should be in range %d-%d, will be changed to default (%d)\n", 378 inline_thold, MIN_PKT_LEN, MAX_INLINE, MAX_INLINE); 379 inline_thold = MAX_INLINE; 380 } 381 } 382 383 static int __init mlx4_en_init(void) 384 { 385 mlx4_en_verify_params(); 386 mlx4_en_init_ptys2ethtool_map(); 387 388 return mlx4_register_interface(&mlx4_en_interface); 389 } 390 391 static void __exit mlx4_en_cleanup(void) 392 { 393 mlx4_unregister_interface(&mlx4_en_interface); 394 } 395 396 module_init(mlx4_en_init); 397 module_exit(mlx4_en_cleanup); 398 399